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Sample records for materialy 9-j mezhdunarodnoj

  1. Proceedings of the Fourth international conference 'Interaction of radiation with solids'; Materialy chetvertoj mezhdunarodnoj konferentsii 'Vzaimodejstvie izluchenij s tverdym telom'

    Energy Technology Data Exchange (ETDEWEB)

    Anishchik, V M [ed.; Zhukova, S I; Azarko, I I; Prikhod' ko, Zh L

    2001-10-01

    The 132 collected papers form the Proceedings of the International Conference 'Interaction of Radiation with Solids'. This Conference is the fourth forum biennially gathering in Minsk the specialists from different countries. The scope of the problems considered at the Conference is widening steadily from year to year including the recent results and most advanced leads in the field of radiation physics of condensed matter. In the proceedings consideration is being given to 'Processes of ion interaction with solids', 'Plasma interaction with surface' and 'Radiation effects in solids'.

  2. Exact computation of the 9-j symbols

    International Nuclear Information System (INIS)

    Lai Shantao; Chiu Jingnan

    1992-01-01

    A useful algebraic formula for the 9-j symbol has been rewritten for convenient use on a computer. A simple FORTRAN program for the exact computation of 9-j symbols has been written for the VAX with VMS version V5,4-1 according to this formula. The results agree with the approximate values in existing literature. Some specific values of 9-j symbols needed for the intensity and alignments of three-photon nonresonant transitions are tabulated. Approximate 9-j symbol values beyond the limitation of the computer can also be computed by this program. The computer code of the exact computation of 3-j, 6-j and 9-j symbols are available through electronic mail upon request. (orig.)

  3. Proceedings of international scientific conference 'Sakharov readings 2004: Environmental problems of the XXI century'; Materialy mezhdunarodnoj nauchnoj konferentsii 'Sakharovskie chteniya 2004 goda: Ehkologicheskie problemy XXI veka'

    Energy Technology Data Exchange (ETDEWEB)

    Kundas, S P; Chudakov, V A [International A. Sakharov Environmental Univ., Minsk (Belarus)

    2004-05-01

    The present publication represents the collection of materials of a scientific conference, which was organized by Ministry for Education of the Republic of Belarus on the basis of International A. Sakharov Environmental University (Minsk, Republic of Belarus). The ecological problems were viewed on the following directions: medical and biological ecology, radioecology and ecological monitoring, eco priority power engineering, social ecology.

  4. Proceedings of 7. international scientific conference 'Sakharov readings 2007: Ecological problems of XXI century'; Materialy 7-oj mezhdunarodnoj nauchnoj konferentsii 'Sakharovskie chteniya 2007 goda: Ehkologicheskie problemy XXI veka'

    Energy Technology Data Exchange (ETDEWEB)

    Kundas, S P; Mel' nov, S B; Poznyak, S S [International A. Sakharov environmental univ., Minsk (Belarus)

    2007-05-15

    Abstracts of the seventh international scientific conference 'Sakharov readings 2007: Ecological problems of XXI century', which was held in the International A. Sakharov environmental university, contents materials on topics: socio-ecological problems, medical ecology, biomonitoring and bioindication, biological ecology. The proceedings are intended for specialists in field of ecology and related sciences, teachers, students and post-graduate students. (authors)

  5. Proceedings of 8. international scientific conference 'Sakharov readings 2008: Ecological problems of XXI century'; Materialy 8-oj mezhdunarodnoj nauchnoj konferentsii 'Sakharovskie chteniya 2008 goda: Ehkologicheskie problemy XXI veka'

    Energy Technology Data Exchange (ETDEWEB)

    Kundas, S P; Mel' nov, S B; Poznyak, S S [International A. Sakharov environmental univ., Minsk (Belarus)

    2008-05-15

    The proceedings of the eighth international scientific conference 'Sakharov readings 2008: Ecological problems of XXI century', which was held in the International A. Sakharov environmental university, contents materials on topics: socio-ecological problems in the light of ideas of academic A. Sakharov; medical ecology; bioecology; biomonitoring, bioindication and bioremediation; radioecology and radiation protection; information systems and technologies in ecology; ecological management; ecological monitoring; ecological education, education for sustainable development; ecological ethics in bioethics education system; problems and prospects of renewable energetics development in Belarus. The proceedings are intended for specialists in field of ecology and related sciences, teachers, students and post-graduate students. (authors)

  6. Proceeding of the 2-nd International Conference 'Long-term Health Consequences of the Chernobyl Disaster'; Materialy 2-j Mezhdunarodnoj konferentsii 'Otdalennye Meditsinskie posledstviya Chernobyl'skoj katastrofy'

    Energy Technology Data Exchange (ETDEWEB)

    Nyagu, A I; Sushkevitch, G N [eds.

    1998-07-01

    On the second International conference 'Long-term health consequences of the Chernobyl disaster' in 1-6 June 1998 Kiev (Ukraine) the following problems were discussed: 1.Epidemiological aspects of the Chernobyl disaster; 2.Clinical and biological effects of ionizing radiation; 3.Social and psychological aftermath of the Chernobyl disaster; 4.Rehabilitation of the Chernobyl disaster survivors.

  7. Proceedings of international conference of leading specialists, young scientists and students 'Ecological problems of XXI century'; Materialy mezhdunarodnoj konferentsii vedushchikh spetsialistov, molodykh uchenykh i studentov 'Sakharovskie chteniya 2002 goda: Ehkologicheskie problemy XXI veka'

    Energy Technology Data Exchange (ETDEWEB)

    Milyutin, A A [International A. Sakharov Environmental Univ., Minsk (Belarus)

    2002-05-01

    The present publication represents the collection of materials of a scientific conference of the leading specialists, young scientists and students, which was organized by Ministry for Education of the Republic of Belarus on the basis of International A. Sakharov Environmental University (Minsk, Republic of Belarus). The ecological problems were viewed on the following directions: ecology, radioecology, ecological monitoring, ecological information systems, eco priority power engineering, eco biology, medical ecology, molecular medicine, social ecology.

  8. Proceedings of 6. international scientific conference 'Sakharov readings 2006: Ecological problems of XXI century'. Pt. 1; Materialy 6-oj mezhdunarodnoj nauchnoj konferentsii 'Sakharovskie chteniya 2006 goda: Ehkologicheskie problemy XXI veka'. Ch. 1

    Energy Technology Data Exchange (ETDEWEB)

    Kundas, S P; Okeanov, A E; Poznyak, S S [International A. Sakharov environmental univ., Minsk (Belarus)

    2006-05-15

    The first part of proceedings of the sixth international scientific conference 'Sakharov readings 2006: Ecological problems of XXI century', which was held in the International A. Sakharov environmental university, contents materials on topics: socio-ecological problems, medical ecology, biomonitoring and bioindication, biological ecology. The proceedings are intended for specialists in field of ecology and related sciences, teachers, students and post-graduate students. (authors)

  9. Proceedings of 5. international scientific conference 'Sakharov readings 2005: Ecological problems of XXI century'. Pt. 2; Materialy 5-oj mezhdunarodnoj nauchnoj konferentsii 'Sakharovskie chteniya 2005 goda: Ehkologicheskie problemy XXI veka'. Ch. 2

    Energy Technology Data Exchange (ETDEWEB)

    Kundas, S P; Okeanov, A E [International A. Sakharov environmental univ., Minsk (Belarus); Shevchuk, V E [Kamiteht pa prablemam nastupstvaw katastrofy na Charnobyl' skaj AEhS pry Savetse Ministraw Rehspubliki Belarus' , Minsk (Belarus)

    2005-05-15

    The first part of proceedings of the fifth international scientific conference 'Sakharov readings 2005: Ecological problems of XXI century', which was held in the International A. Sakharov Environmental University, contents materials on topics: radioecology, ecological and radiation monitoring, new information systems and technologies in ecology, priority ecological power engineering, management in ecology, ecological education. The proceedings are intended for specialists in field of ecology and related sciences, dosimetry, engineers, teachers, students and post-graduate students.

  10. Proceedings of 5. international scientific conference 'Sakharov readings 2005: Ecological problems of XXI century'. Pt. 1; Materialy 5-oj mezhdunarodnoj nauchnoj konferentsii 'Sakharovskie chteniya 2005 goda: Ehkologicheskie problemy XXI veka'. Ch. 1

    Energy Technology Data Exchange (ETDEWEB)

    Kundas, S P; Okeanov, A E [International A. Sakharov environmental univ., Minsk (Belarus); Shevchuk, V E [Kamiteht pa prablemam nastupstvaw katastrofy na Charnobyl' skaj AEhS pry Savetse Ministraw Rehspubliki Belarus' , Minsk (Belarus)

    2005-05-15

    The first part of proceedings of the fifth international scientific conference 'Sakharov readings 2005: Ecological problems of XXI century', which was held in the International A. Sakharov Environmental University, contents materials on topics: socio-ecological problems, medical ecology, biological ecology. The proceedings are intended for specialists in field of ecology and related sciences, teachers, students and post-graduate students. (authors)

  11. Materiali acustici fonoisolanti e fonoassorbenti di origine vegetale - Acoustic materials of vegetable origin for sound absorption and sound insulation

    Directory of Open Access Journals (Sweden)

    Francesco Asdrubali

    2015-10-01

    Full Text Available I materiali acustici di origine vegetale possono rappresentare delle valide alternative sia dal punto di vista prestazionale che ambientale ai materiali sintetici e minerali, ma al momento attuale un esiguo numero di essi è già pronto da essere commercializzato. La presente memoria propone uno stato dell’arte su questa famiglia di materiali, fornendo le caratteristiche di fonoisolamento/assorbimento a partire dai materiali più diffusi fino a quelli meno convenzionali. Tali prodotti sono realizzati dagli scarti delle coltivazioni e delle aziende di trasformazione: ciò comporta un impatto ambientale basso se i materiali sono disponibili localmente e non in conflitto con colture alimentari. ------ Acoustic materials of vegetable origin can be a good alternative to traditional ones both from the technical and environmental point of view but very few of them are technologically mature enough to be commercialized. The present paper reports a state of the art of this family of materials, providing the acoustic characteristics starting from the most widespread and promising products to the unconventional ones. These products are realized using the residuals of the cultivation process or of the processing industry so their environmental impact is very low, if the raw materials are local and are not in contrast with food crops.

  12. Potential of polymeric materials for packaging; L'impiego dei materiali polimerici nell'imballaggio

    Energy Technology Data Exchange (ETDEWEB)

    Lanchi, M [ENEA, Divisione Nuovi Materiali, Centro Ricerche Casaccia, Rome (Italy)

    2001-07-01

    'industria italiana del packaging si colloca tra i settori piu' efficienti e competitivi. Per quanto riguarda i campi di utilizzo, la destinazione degli imballaggi e' principalmente verso il settore alimentare, che da solo copre una quota di circa il 42%, mentre, considerando anche il comparto delle bevande, tale quota sale al 65%. Le materie plastiche vengono largamente impiegate in questo settore, grazie alla proprieta' molto diversificate: leggerezza, inerzia e resistenza alla corrosione, facile formabilita', buona trasparenza, capacita' di attenuazione delle vibrazioni meccaniche e sonore, elevata conservabilita' nel tempo, elevate caratteristiche dielettriche, ecc. I numerosi metodi di trasformazione attualmente in uso e le diverse tecniche di lavorazione dei materiali polimerici consentono di ottenere i prodotti estremamente variegati. Restringendo il campo di interesse al settore agroalimentare, fortemente sviluppato nel sud-italia, si possono individuare numerose prospettive di crescita per i polimeri utilizzati nell'imballaggio: sviluppo di films polimerici a bassa permeabilita' e ad alta selettivita'; sviluppo della tecnologia dell'atmosfera modificata; sviluppo di films polimerici attivi quali i films antimicrobici o i films trasferitori di odore e di colore. Altra linea di ricerca promettente e' lo sviluppo di imballaggi in plastica ecocompatibili mediante la produzione di materiali ad alte prestazioni specifiche che riducano i volumi dei rifiuti e agevolino le operazioni di smaltimento, e/o la realizzazione di confezioni alimentari in materiale il piu' possibile biodegradabile, attraverso il ricorso a blend di plastiche e polimeri bioderivati.

  13. Proceedings of the second international scientific and practical conference 'Mitigation of the consequences of the catastrophe at the Chernobyl NPP: state and perspectives'; Materialy II mezhdunarodnoj nauchno-prakticheskoj konferentsii 'Preodolenie posledstvij katastrofy na Chernobyl'skoj AEhS: sostoyanie i perspektivy'simpoziuma 'Aktual'nye problemy dozimetrii'

    Energy Technology Data Exchange (ETDEWEB)

    Shevchuk, V E; Gurachevskij, V L; Kapitonova, Eh K [eds.

    2004-04-01

    The proceeding reflects new scientific results and contains three parts - medical consequences of the Chernobyl NPP accident and dose monitoring of human population; problems of the contaminated territories and social and economical development of the regions; radioecological and radiobiological consequences of the accident and their forecasting.

  14. Potential of polymeric materials for packaging; L'impiego dei materiali polimerici nell'imballaggio

    Energy Technology Data Exchange (ETDEWEB)

    Lanchi, M. [ENEA, Divisione Nuovi Materiali, Centro Ricerche Casaccia, Rome (Italy)

    2001-07-01

    'ambito della produzione, l'industria italiana del packaging si colloca tra i settori piu' efficienti e competitivi. Per quanto riguarda i campi di utilizzo, la destinazione degli imballaggi e' principalmente verso il settore alimentare, che da solo copre una quota di circa il 42%, mentre, considerando anche il comparto delle bevande, tale quota sale al 65%. Le materie plastiche vengono largamente impiegate in questo settore, grazie alla proprieta' molto diversificate: leggerezza, inerzia e resistenza alla corrosione, facile formabilita', buona trasparenza, capacita' di attenuazione delle vibrazioni meccaniche e sonore, elevata conservabilita' nel tempo, elevate caratteristiche dielettriche, ecc. I numerosi metodi di trasformazione attualmente in uso e le diverse tecniche di lavorazione dei materiali polimerici consentono di ottenere i prodotti estremamente variegati. Restringendo il campo di interesse al settore agroalimentare, fortemente sviluppato nel sud-italia, si possono individuare numerose prospettive di crescita per i polimeri utilizzati nell'imballaggio: sviluppo di films polimerici a bassa permeabilita' e ad alta selettivita'; sviluppo della tecnologia dell'atmosfera modificata; sviluppo di films polimerici attivi quali i films antimicrobici o i films trasferitori di odore e di colore. Altra linea di ricerca promettente e' lo sviluppo di imballaggi in plastica ecocompatibili mediante la produzione di materiali ad alte prestazioni specifiche che riducano i volumi dei rifiuti e agevolino le operazioni di smaltimento, e/o la realizzazione di confezioni alimentari in materiale il piu' possibile biodegradabile, attraverso il ricorso a blend di plastiche e polimeri bioderivati.

  15. Impiego di materiali plastici nell'industria alimentare: rilascio di 'Endocrine Disruptors' valutato mediante test a breve termine in vitro

    Directory of Open Access Journals (Sweden)

    D. Reali

    2003-05-01

    Full Text Available

    Obiettivi: valutazione del rischio di esposizione della popolazione a composti chimici estrogenomimetici rilasciati da materiali plastici utilizzati nell’industria delle bevande e nel packaging di alimenti

    Metodi: messa a punto di un metodo di estrazione di composti organici da flussi acquosi tramite l’uso di resine di amberlite® XAD®-2 con passaggio di matrice acquosa (50ml/min attraverso tubi di adduzione. L’analisi chimica di eventuali composti chimici migranti da tubi e contenitori per bevande è stata effettuata con GC/MS e arricchimento con tecnica SPME. L’attività estrogeno mimetica degli estratti è stata saggiata con un test biologico a breve termine, il Yeast Estrogen Screen. Il costrutto di Saccharomyces cerevisiae è vettore di sequenze di DNA che codificano il recettore estrogenico alfaumano e i rispettivi response elements legati alla regione promotrice del gene reporter LacZ per la ßgalattosidasi. L’induzione di sintesi di ß-galattosidasi dipende dall’attivazione del gene reporter conseguente all’affinità di legame ligando-recettore e viene misurata spettrofotometricamente. La potenza estrogenica viene calcolata in riferimento all’attività elicitata dall’ormone naturale 17ß-estradiolo nelle stesse condizioni sperimentali preso come controllo positivo di riferimento (RIE.

    Risultati preliminari e Conclusioni: l’analisi tossicologica in vitro ha evidenziato che nell’acqua che è stata a contatto con silicone e PVC in condizioni dinamiche sono presenti composti chimici (1-10 μg/lt: con attività estrogeno-mimetica (RIE= 87.31;44.28. Sono emersi aspetti interessanti da studiare ulteriormente nell’ottica della promozione della sicurezza alimentare.

  16. Analytical complements to the parity-independent Racah-Wigner calculus for the superalgebra osp(1/2). Part 2. (9-jS symbols)

    International Nuclear Information System (INIS)

    Brehamet, L.

    2006-01-01

    An original method for defining 9-j S symbols for osp(1|2), directly in terms of parity-independent 6-j S symbols is developed, from both osp(1|2) Racah and Biedenharn-Elliott sum rules only. The important property of invariance under transposition is preserved. This method exhibits at the same time their definition and their permutational symmetries. Formulas of the six different 9-j S symbols with one argument zero are listed. In addition to the pseudo-orthogonality relation, various sum rules up to triple summations, analogous to those known for su(2), are also derived, the phase factors of which are given with the most compact form as possible, mainly in terms of integral parts. osp(1|2) analog of the famous Innes-Ufford identity is written down. Definition of mixed tensor operators is given, followed by the formula of its associated osp(1|2) tensorial permutation identity. Expressions for their reduced matrix elements in coupled basis are derived and explicited in terms of 9-j S symbols. After a detailed approach of the concept of a total super angular momentum J (1x2), examples of calculus with products of mixed tensor operators are presented, showing clearly the occurrence of 9-j S symbols in the study of reduced matrix elements problems

  17. Mechanochemical treatment of polymeric materials. A low environmental impact solution for mixed plastic waste recycling; Il trattamento meccanochimico di materiali polimerici: una soluzione a basso impatto ambientale per il riciclaggio di plastiche eterogenee

    Energy Technology Data Exchange (ETDEWEB)

    Padella, F.; Magini, M.; Masci, A. [ENEA Centro Ricerche Casaccia, Rome (Italy). Dipt. Innovazione

    1999-07-01

    Standard polymeric materials as well as mixtures of them coming from urban wastes, were milled at near room temperature in suitable milling conditions. All the experiments carried out gave a material having a homogeneous fibrous aspect. Structural and thermal analysis of the resulting material clearly shows that the mechanochemical action is able to promote a deep destructuring of the starting networks with a very high energy storage in the milled materials. Further, the fibrous material can be easily consolidated whatever the starting composition of the mixture. preliminary results, coming from mechanical tests on compacted materials, lead to an optimistic conclusion as far as plastic recycling by ball milling is concerned. [Italian] Materiali polimerici standard, cosi' come miscele di materiali plastici provenienti da rifiuti solidi urbani, sono stati macinati a temperatura pressoche' ambiente in opportune condizioni operative. Tutti gli esperimenti hanno prodotto un materiale morfologicamente omogeneo di aspetto fibroso. Le analisi termiche e strutturali condotte sui prodotti mostrano chiaramente come l'azione meccanochimica sia in grado di promuovere una forte destrutturazione del materiale di partenza, accompagnata da un evidente accumulo di energia nel prodotto macinato. In aggiunta, il materiale fibroso puo' essere facilmente consolidato in forme finite, indipendemente dalla composizione di partenza. I risultati preliminari delle prove meccaniche eseguite sui materiali consolidati inducono a conclusioni ottimistiche relativamente all'utilizzo di tecniche di macinazione ad alta energia per il riciclaggio di materiali plastici.

  18. L’italiano L2 : auto-apprendimento e narratività. Materiali multimediali di italiano L2 per bambini e ragazzi.

    Directory of Open Access Journals (Sweden)

    Graziella Favaro

    2009-12-01

    Full Text Available Normal 0 14 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabella normale"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} Normal 0 14 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabella normale"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} Insegnare l'italiano come seconda lingua ai bambini e ragazzi di recente immigrazione è un percorso  delicato e complesso che  fa ormai parte  dei compiti professionali ";ordinari"; dei docenti che operano nelle classi sempre più multiculturali e plurilingui. La modalità di insegnamento/apprendimento della L2 più diffusa ed efficace è quella integrata: l'alunno non italofono è inserito nella classe comune e, parallelamente, in determinati momenti, frequenta il laboratorio  di italiano L2. Per  sostenere  questo modello integrato e accompagnare il  viaggio dentro l'italiano dei bambini e dei ragazzi neoarrivati, servono materiali didattici flessibili e ricchi di proposte, utilizzabili in maniera autonoma e in piccolo gruppo; proponibili in maniera tradizionale o anche attraverso la LIM; adatti a sviluppare competenze diverse, proprie della lingua per comunicare, dell'italiano scritto e propedeutiche all'apprendimento del curricolo comune. I due corsi di italiano L2  che vengono presentati nell'ultima parte dell'articolo rispondono a queste esigenze, in quanto a sono rivolti l'uno ai bambini e l'altro ai ragazzi stranieri neo arrivati; b si propongono  il passaggio dal livello prebasico ai livelli A1, A2 e B1 del QCERL; c si

  19. Condizioni materiali ed effetti concreti del pensiero

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    Enrico Redaelli

    2011-01-01

    Full Text Available L’autore tesse un dialogo tra le svariate istanze emerse dagli altri saggi qui raccolti, rimettendo via via in prospettiva quei problemi all’interno di una originale rilettura della proposta “etica” variamente elaborata dalle voci più avanzate dell’ermeneutica contemporanea: fare filosofia dopo Nietzsche significa esibire il limite e la volontà di verità a partire da cui parla la filosofia stessa; ma esibire quel limite non è più un gesto “veritativo” quanto un atto “politico”: non è un nuovo sapere né un ironico non sapere, ma un fare; non un’esercitazione alla morte ma una messa in opera della vita.

  20. Artificial implantation materials; Sztuczne materialy implantacyjne

    Energy Technology Data Exchange (ETDEWEB)

    Lewandowska-Szumiel, M [Akademia Medyczna, Warsaw (Poland)

    1997-10-01

    The radiation techniques for sterilization of orthopedic materials and high performance biomaterials have been reviewed. The radiation formulation of synthetic biomaterials for implantation and other medical use have been also performed. 18 refs, 3 tabs.

  1. Allestimenti museali, mostre e aura dei materiali tra le due guerre nel pensiero di Amedeo Maiuri / Museum displays, exhibitions and aura of materials between WWI and the WWII in Amedeo Maiuri’s thinking

    Directory of Open Access Journals (Sweden)

    Gabriella Prisco

    2016-12-01

    Full Text Available Obiettivo di questo studio è l’approfondimento di un aspetto poco noto dell’attività del soprintendente archeologo della Campania Amedeo Maiuri, ossia il suo pensiero e le sue realizzazioni in campo museale negli anni Trenta, sia attraverso allestimenti stabili, sia la partecipazione ad alcune grandi mostre-evento. Nessuno di tali allestimenti è sopravvissuto; ci si è avvalsi pertanto di immagini, documenti d’archivio e testi d’epoca, con particolar riguardo a quanto Maiuri stesso illustrò in contributi dedicati ai singoli allestimenti, ma soprattutto nel rapporto redatto in occasione della conferenza di Madrid del 1934 dedicata ai musei. Da questo percorso emerge il ritratto di un Maiuri ben informato sulle più aggiornate linee di tendenza sul tema, alcune delle quali – come il doppio percorso dedicato a grande pubblico e studiosi, il diradamento degli oggetti da esporre, lo schiarimento delle pareti – egli applicò costantemente, all’interno di allestimenti dove si coglie un’eco dei musei di ambientazione. Nella sua partecipazione alle due grandi mostre (quella “Augustea della Romanità” e la “Prima Mostra Triennale delle Terre Italiane d’Oltremare” che videro protagonista l’archeologia, si coglie infi ne un attaccamento all’esposizione di originali che contrasta con la prevalente volontà dell’epoca di abdicare all’aura dei materiali a favore di allestimenti più liberi, ma anche maggiormente piegati alle necessità della propaganda, fi no a confl iggere con i fondamenti stessi della disciplina di cui pure Maiuri fu un insigne rappresentante. The aim of this study is the deepening of a little-known aspect of the activity of the Superintendent Archaeologist of Campania, Amedeo Maiuri, his thinking and his accomplishments on the museum fi eld in the ‘30, both through permanent displays, both for participation in some large exhibitions-event. None of these displays has survived; there has therefore made

  2. Adesione batterica e fungina a materiali protesici del cavo orale

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    Fabrizio Cavallini

    2005-12-01

    Full Text Available Introduction.The microbial adhesion to dental material was studied employing a acrylic resin and representative microrganisms. Method. Bacterial suspensions (about 108 CFU/ml were mixed to dental material with different surface finishes. Bacterial counts were carried out before and after 1 hour at 37°C.A tube without dental material was used as control.The same experiments were also performed at the presence of saliva. Results. Candida albicans demonstrated to adhere to free energy material at an incidence 64% while Staphylococcus aureus and Streptococcus oralis showed more adhesive properties for roughness material (34 and 52% respectively. The presence of saliva influenced the adhesiveness to all materials with the exception of S. aureus that increased from 20 to 29% the number of cells on the surface of free energy material. Conclusion. The surface finishes appeared did not significantly influence the adhesion of microrganisms to this material.

  3. Workshop UNK-600 (proceedings); Materialy rabochego soveshchaniya UNK-600

    Energy Technology Data Exchange (ETDEWEB)

    Zajtsev, A M; Bitykov, S I [eds.

    1994-12-31

    Proceedings are presented of the workshop devoted to the accelerating storage complex of IHEP (UNK-600). In the first section is given the information on the present status of the UNK-600 and particle channels design and on the adopted experiment NEPTUN-A. In the papers of the second section are discussed hadron physics investigations at 600 GeV. Experiments in the neutrino and muon beams are analyzed. A possible program of studying the charged kaon rare decays is described.

  4. Sovremennye immobilizatsionnye materialy v lechenii sindroma diabeticheskoy stopy

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    Alla Yur'evna Tokmakova

    2001-06-01

    Full Text Available В отделении диабетической стопы ЭНЦ РАМН разработана методика создания индивидуальной разгрузочной повязки с использованием современного синтетического фиксирующего материала ЦЕЛЛОКАСТ (Lohmann, Австрия. Повязки были применены у пациентов с нейропатическими язвами пяточной области и средней части стопы. В настоящей статье представлена серия клинических наблюдений пациентов с синдромом диабетической стопы, для лечения которых была применена инновационная технология разгрузки.

  5. Dispersion-Type Absorbing Materials for the Control Organs of Thermal Reactors; Absorbants du Type a Dispersion pour les Organes de Commande des Reacteurs a Neutrons Thermiques; Pogloshchayushchie materialy dispersionnogo tipa dlya organov regulirovaniya teplovykh reaktorov; Absorbentes de Tipo Dispersion para los Organos de Mando de los Reactores Termicos

    Energy Technology Data Exchange (ETDEWEB)

    Nosov, V. I.; Ponomarjov-Stepnoj, H. H.; Portnoj, K. I.; Savel' ev, E. G.

    1964-06-15

    'nyh jelementov (gadolinija, samarija, evropija it d.). Rassmatrivajutsja voprosy izmenenija pogloshhajushhej sposobnosti ot sostava materiala, mehanicheskie i teplofizicheskie svojstva pogloshhajushhih materialov v zavisimosti ot koncentracii vvodimogo v splav poglotitelja i, nakonec, rezul'taty izuchenija vlijanija obluchenija na svojstva ukazannyh materialov. Pokazano, chto pogloshhajushhie splavy s okislami redkozemel'nyh jelementov, dispergirovannymi v metallicheskuju matricu, obladajut znachitel'noj pogloshhajushhej sposobnost'ju pri sravnitel'no nebol'shom soderzhanii poglotitelja v splave - (5 - 10). Splavy tipa nimonik s dobavkami okislov redkozemel'nyh jelementov imejut sravnitel'no vysokie znachenija prochnostnyh i teplofizicheskih harakteristik (o{sub B}, E, {lambda}) pri povyshennyh temperaturah v oblasti koncentracij poglotitelja Tilde-Operator do (10% Dispersionnye materialy podobnogo tipa obladajut udovletvoritel'noj radiacionnoj stojkost'ju v pole obluchenija ( Tilde-Operator 3 x 10{sup 20} n/cm{sup 2}) v uslovijah vysokih temperatur. (author)

  6. 9-J N AGBO-BOOK REVIEW-EXISTENCE AND CONSOLATION-FT ...

    African Journals Online (AJOL)

    JONATHAN

    Every culture and people have made attempts to address this question, since ... morality, life, relativism, death, immortality, comparative philosophy, et cetera . ... concept of humanity on the ground of the necessity of consolation, we speak of.

  7. Transgenic expression of the Aedes aegypti CYP9J28 confers pyrethroid resistance in Drosophila melanogaster

    NARCIS (Netherlands)

    Pavlidi, N.; Monastirioti, M.; Daborn, P.; Van Leeuwen, T.; Vontas, J.

    2012-01-01

    The emergence and spread of insecticide resistance in mosquitoes, such as the major vector of dengue and yellow fever Aedes aegypti, is a major public health problem. A number of studies have been conducted to-date aiming to identify specific molecular changes that are associated with the phenotype,

  8. Evroregiony kak faktor uspeshnoj mezhdunarodnoj integracii v sovremennyh uslovijah [Euroregions as a factor of successful international integration in modern conditions

    Directory of Open Access Journals (Sweden)

    Vovenda Alexei

    2011-01-01

    Full Text Available This article focuses on the correlation between the contemporary crisis phenomenon in the Eurozone and some CIS countries, and the existing Euroregions. We attempt to analyze the interdependence of the qualitative aspect of cross-border relations of European countries with their economic sustainability in the context of regional international integration. The theoretical significance of this work lies in the revealed correlation between the efficiency of cross-border Euroregions and the additional resources that can be retrieved in the framework of national economic policy during global recession. The practical component lies in clarifying the conceptual framework for the formation of successful crossborder cooperation in today's Europe. The authors employed the historical-descriptive approach and factual consideration of the cross-border and macro-regional level of interaction between European countries. The main results are as follows. The crisis in several EU countries is associated with a complex of causes that deplete the platform for multilateral cooperation in Europe. To a lesser extent, the crisis has affected the states that are actively involved in cross-border cooperation projects. The formation of European regions is closely related to the industrial development of their regions. The Post-Soviet space requires a redistribution of the overcentralized power. The abundance of Euroregions along the perimeter of certain states may be an indicator of economy's resilience to potential shocks. The provisions set forth in the article contribute to an improvement of the scientific understanding of political regionalistics and take the current understanding of the international system to the level of cross-border relations and institutions creating a system of interrelated elements of macro-regional and national building. The results can be applied in the development of a conceptual and legal framework for the construction of cross-border political formations in the Post-Soviet space, especially, within the Eurasian Economic Community, which coined the concept of «eurasiaregion».

  9. I learning object: la condivisione dei materiali didattici come naturale evoluzione del web

    Directory of Open Access Journals (Sweden)

    Corrado Petrucco

    2004-01-01

    Full Text Available Discussion of Learning Objects (LO and sharing of educational materials. In addition to the standards that exist today, some issues are dealt with the emergence of these new objects of learning.

  10. ODPADNI MATERIALI PRI LIKOVNIH DEJAVNOSTIH S PODROČJA KIPARSTVA V PREDŠOLSKEM OBDOBJU

    OpenAIRE

    Pejčić, Lidija

    2014-01-01

    Živimo v času tehnološkega napredka in rasti svetovnega prebivalstva, ki hkrati za svoj obstoj ustvarjata v okolju neugodne posledice. Sedanje ekološko stanje nas spodbuja k razmišljanju in reševanju položaja, v katerega je zabredel človek s sodobnim, a za naravo ogrožajočim načinom življenja. Narava je izčrpana od posegov vanjo, okolje pa je prepolno z negativnimi vplivi materialnega obilja. Človek mora najti zagon in poti, da bo izboljšal kakovost življenja zase in za prihodnje rodov...

  11. Approccio pedagogico alla dimensione partecipativa per l’integrazione tra saperi materiali e immateriali

    Directory of Open Access Journals (Sweden)

    Giovanna Del Gobbo

    2011-11-01

    Full Text Available The present contribution is placed in the frame of international research project (Italy, Brazil, Cuba, Guatemala, Nicaragua that, from 2006 until 2010 with the involvement of ten Universities, developed the elaboration and the application of interdisciplinary theoretical and methodological models for the analysis and the valorization of human capital and territorial patrimony for the endogenous sustainable development. In the Project, the appeal to heuristic methodologies, for experiences’ analysis, has allowed to individualize interpretative categories that can represent criterions for transfer and dissemination of the research outputs. The dimension of “participation” appears surely an interesting category, especially if it is in relationship to the idea of development of the communities and the subjects. The contribution, further to a theoretical-methodological reflection on the “participation”, introduces the analysis of a research experience in the Mayan communities of Guatemala.

  12. Ricostruzione 3D e caratterizzazione dei materiali delle statue Moai dell’Isola di Pasqua

    Directory of Open Access Journals (Sweden)

    Maria Marsella

    2009-03-01

    Full Text Available Integration of advanced geomatic and geophysics surveys for characterization of Moai statues in Easter Island (Chile Between 15 and 27 July 2008 a field campaign aimed at collecting topographical and geophysical data useful for geometric reconstruction and material characterization of a Moai Statue was carried out on the Ester Island (Rapa Nui,Chile. The scientific activity, conducted by a team of researchers of Sapienza University of Rome (DITS and of the Institute for Environmental Protection and Research (ISPRA, is part of the “MOAI AL MONDO” Project, coordinated by Marenostrum Foundation and sponsorized by Louis Vuitton Malletier. which promote the dissemination of the cultural and archeological heritage of Easter Island’s people to Europe and to the world.

  13. Analisi dell’anisotropia microstrutturale in materiali compositi rinforzati con fibre corte

    Directory of Open Access Journals (Sweden)

    D. Dreossi

    2008-01-01

    Full Text Available La microtomografia con luce di sincrotrone si è rivelata una tecnica particolarmente efficace per l’analisi della struttura risultante dalla distribuzione degli orientamenti assunti dalle fibre di rinforzo di compositi rinforzati con fibre di vetro. La ricostruzione dell'immagine tridimensionale ha consentito la visualizzazionedella distribuzione spaziale delle fibre all'interno della matrice polimerica anche nel caso di fibre di piccole dimensioni (diametro medio di 10 micrometri. E' stato quindi possibile misurare le differenze nell'orientamento delle fibre nei differenti strati di un campione utilizzando metodi basati sulla valutazione del Mean Intercept Length (MIL e del fabric tensor. La tecnica descritta è stata applicata a un campione di poliammide 6 rinforzato con il 30% di fibre corte di vetro ricavato da lastra.

  14. Applicazione di film sottili per il controllo della diffusione e della permeabilità di materiali polimerici per UHV

    CERN Document Server

    Bellachioma, Maria Cristina; Kenny, Josè M

    The solubility and transport behaviour of low molecular weight substances in polymeric materials are topics of interest for many fields of science and technology. The importance and relevance of such behaviour has become more apparent in recent years because of the large number of conceivable applications, such as gas barriers or gas separation membranes in the medical or industrial field. For instance, polymers with high barrier properties are required for packaging of carbonated soft drinks, where the permeation of carbon dioxide, oxygen and water should be suppressed. Products containing fats and oils require protection against oxygen and in gas separation processes polymeric membranes presenting both high permeability and selectivity are applied. In the biomedical area, materials used in contact lenses require high oxygen permeability, surface hydrophilicity and biocompatibility. Moreover, polymers present many attractive properties for the construction of vacuum components. They are easily formed, light,...

  15. Proceedings of the V. international symposium 'Actual problems of dosimetry'; Materialy V mezhdunarodnogo simpoziuma 'Aktual'nye problemy dozimetrii'

    Energy Technology Data Exchange (ETDEWEB)

    Kundas, S P; Okeanov, A E [International A. Sakharov environmental univ., Minsk (Belarus); Shevchuk, V E [Komitet po problemam posledstvij katastrofy na Chernobyl' skoj AEhS pri Sovete Ministrov Respubliki Belarus' , Minsk (Belarus)

    2005-10-01

    The main topics of the workshop were: monitoring and reconstruction of radiation doses at radiation accidents, biological dosimetry and markers of radiation effects as well as normative, metrological and technical aspects of dosimetric and radiometric monitoring.

  16. I materiali della collezione Altobello del Museo di Zoologia dell'Università di Bologna 1. Mammiferi

    Directory of Open Access Journals (Sweden)

    Dino Scaravelli

    1994-05-01

    Full Text Available Abstract Materials of Altobello collection in the Zoological Museum, University of Bologna 1. Mammals - Mammals of Altobello Collection of the Zoologica1 Museum, University of Bologna, are listed. 165 stuffed specimens of 26 species are now present, coming from Central Italy (years 1889 - 1929. Only a specimens of Sciurus vulgaris coming from Tuscany is not comprised in the "Catalogo manoscritto della fauna dell'Abruzzo e del Molise" of the Author. Riassunto Sono passati in rassegna i Mammiferi della Collezione Altobello presenti nel Museo di Zoologia dell'Università di Bologna. 165 esemplari naturalizzati appartenenti a 26 specie e provenienti dal centro Italia (anni 1889 - 1929 sono attualmente presenti. Solo un esemplare di Sciurus vulgaris proveniente dalla Toscana non fa parte del "Catalogo manoscritto della fauna dell'Abruzzo e del Molise" dell'Autore.

  17. L'Uso dei Materiali Video nei Test Linguistici (The Use of Video Materials in Language Tests).

    Science.gov (United States)

    Diadori, Pierangela

    1995-01-01

    This article argues that a communicative language course must have communicative exams. It explains how to choose and use material to test students' listening comprehension and socio-cultural knowledge. Transcripts of a commercial, a talk show, a film, a TV news show, and a documentary are included accompanied by exercises. (CFM)

  18. A study on damage and fatigue characteristics of plain woven carbon fiber reinforced composite material(I)

    International Nuclear Information System (INIS)

    Kim, Kwang Soo; Kim, Sang Tae

    1993-01-01

    The characteristics of damage and fatigue subjected to tensile fatigue loading in plain woven carbon fiber reinforced composite material were studied. Constant amplitude load of 90% stress of notch strength was applied to each specimen, which had different initial notch length, and crack dectectvie compliance curve was determined form load-displacement data. The effective crack length(a eff ) was obtained form this compliance curve and the effective crack growth could be divided to three-steps and explained separately. After cycling the shape of fatigue crack was observed by S.E.M.. Change of elastic modulus(E N ) during fatigue cycle was explained by repeated sudden-death medel. The material constant determined by Jen-Hsu model was more useful to evaluate damage than Wang-Chim model. (Author)

  19. Materials of conference: Hydrogeological Problems of South-West Poland; Materialy konferencji: Problemy Hydrogeologiczne Poludniowo-Zachodniej Polski

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-12-31

    Hydrogeological problems of South-west Poland is the collection of conference papers held in Szklarska Poreba on 20-22 June 1996. The materials have been gathered in three topical groups: water quality problems in hydrological cycle, regional hydrogeology of South-west Poland, theoretical problems and research methods in hydrogeology. More of performed articles have a interdisciplinary character taking into account the precipitation and surface water quality and their influence on ground water features.

  20. Book of abstracts of the 3rd International conference and the 3rd International School for young scientists Interaction of hydrogen isotopes with structural materials. IHISM-07; Tezisy dokladov Tret'ej mezhdunarodnoj konferentsii i Tret'ej mezhdunarodnoj Shkoly molodykh uchenykh i spetsialistov Vzaimodejstvie izotopov vodoroda s konstruktsionnymi materialami. IHISM-07

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    The book involves abstracts of presentations at the 3rd International Conference and the 3rd International School for Young Scientists Interaction of Hydrogen Isotopes with Structural Materials (IHISM-07). The activities of Russian and foreign scientific centers associated with the use of hydrogen isotopes in power engineering, national economy and basic research are considered. The presentations cover the following areas: kinetics and interaction between hydrogen isotopes and solids including effects of radiogenic helium accumulation, hydrides and hydride transformations; structural transformations and mechanical properties; equipment and research techniques.

  1. Data summary report for the destructive examination of Rods G7, G9, J8, I9, and H6 from Turkey Point Fuel Assembly B17

    Energy Technology Data Exchange (ETDEWEB)

    Davis, R B; Pasupathi, V

    1981-04-01

    Destructive examination results of five spent fuel rods from a Turkey Point Unit 3 pressurized water reactor are reported. Examinations included fission gas analysis, cladding hydrogen content analysis, fuel burnup analysis, metallographic examination, autoradiography and shielded electron microprobe analysis. All rods were found to be of sound integrity with an average burnup of 27 GWd/MTU and a 0.3% fission gas release.

  2. Juhtimise juhiseid 11/9-järgsesse maailma : ettevaatusabinõud ja strateegia ebajärjekindluse ajastul / Ralph W Shrader, Mike McConnell

    Index Scriptorium Estoniae

    Shrader, Ralph W

    2002-01-01

    Ettevõtete juhtide kohustuste hulka kuulub turvalisuse tagamine ja riskide juhtimine. See hõlmab töötajate ohutuse tagamist, firma põhitegevuse ning süsteemide kaitset. Diagrammid. Lisa: Juhend sõjamängude mõistmiseks: vahend haavatuse/töökatkestuste hindamiseks

  3. 17 years after the Chernobyl' accident: problems and decisions. Proceedings of the International scientific and practical conference; 17 let posle Chernobylya: problemy i resheniya. Sbornik nauchnykh trudov Mezhdunarodnoj nauchno-prakticheskoj konferentsii

    Energy Technology Data Exchange (ETDEWEB)

    Shevchuk, V E; Gurachevskij, V L; Kolbanov, V V

    2003-04-01

    The book contains proceedings of the scientific conference on difference medical and biological problems of consequences of the Chernobyl NPP accident, as well as on the problems of rehabilitation of the contaminated territories and ecosystems.

  4. Materials of 3. scientific-technical seminar: Materials Investigation for Power Industry; Materialy 3. seminarium naukowo-technicznego: Badania Materialowe na Potrzeby Elektrowni i Przemyslu Energetycznego

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-12-31

    The report is an assembly of the papers concerning material problems during the exploitation of power stations as well as during construction and exploitation of gas pipelines. The accreditation problems according to the European Standards and Office of Technical Inspection prescription are also discussed.

  5. Materials of All-Polish Symposium Nuclear Techniques in Industry, Medicine, Agriculture and Environment Protection; Materialy Krajowego Sympozjum Technika Jadrowa w Przemysle, Medycynie, Rolnictwie i Ochronie Srodowiska

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-07-01

    The All-Polish Symposium Nuclear Techniques in Industry, Medicine, Agriculture and Environment Protection is cyclic (in 3 year period) conference being a broad review of state of art and development of all nuclear branches cooperated with industry and other branches of national economy and public life in Poland. The conference has been divided in one plenary session and 8 problem sessions as follow: Radiation technologies of flue gas purification; radiation technologies in food and cosmetic industry; application of nuclear techniques in environmental studies and earth science; radiometric methods in material engineering; isotope tracers in biological studies and medical diagnostics; radiometric industrial measuring systems; radiation detectors and device; nuclear methods in cultural objects examination. The poster section as well as small exhibition have been also organised.

  6. 2. National scientific conference on process engineering in environment protection. Conference materials; 2. Ogolnopolska konferencja naukowa ``inzynieria procesowa w ochronie srodowiska``. Materialy konferencyjne

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-12-31

    The national conference on `Process engineering in environment protection` Jachranka 1994 has been divided into three sessions. Section 1 has been devoted to flue gas purification and collects 13 papers. Section 2 on liquid purification gathered 8 presentation. Section 3 - the poster session with 12 posters on related topics. During the conference 2 lectures and 3 posters have been devoted to the application of nuclear techniques to the solution different problems connected with environment protection.

  7. Valutazione della sostenibilità ambientale tramite metodologia LCA di sistemi per lo sfruttamento di fonti alternative di energia e materiali

    OpenAIRE

    Chiavetta, Cristian

    2013-01-01

    La dissertazione ha riguardato l’analisi di sostenibilità di un sistema agronomico per la produzione di olio vegetale a fini energetici in terreni resi marginali dall’infestazione di nematodi. Il processo indagato ha previsto il sovescio di una coltura con proprietà biofumiganti (brassicacea) coltivata in precessione alla specie oleosa (soia e tabacco) al fine di contrastare il proliferare dell’infestazione nel terreno. Tale sistema agronomico è stato confrontato attraverso una analisi di cic...

  8. All-union symposium on radiodiagnosis and radiotherapy of malignant neoplasms in children; Luchevaya diagnostika i luchevaya terapiya zlokachestvennykh novoobrazovanij u detej. Materialy Vsesoyuznogo simposiuma

    Energy Technology Data Exchange (ETDEWEB)

    Tsyb, A F; Durnov, L A [eds.

    1990-07-01

    This volume contains the proceedings of the All-Union Symposium on Radcodiagnosis and Radiotherapy of Malignant Neoplasms in Children held in Obnisk, Russian SFSR May 10-11, 1990. Individual papers were prepared for the database.

  9. Materials of 4. Spring School of Radiation Sterilization of Medical Materials, Grafts, Pharmaceutics and Cosmetics; Materialy 4. Wiosennej Szkoly Sterylizacji Radiacyjnej Sprzetu Medycznego, Przeszczepow, Farmaceutykow i Kosmetykow

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-10-01

    The state of art in well developed in Poland radiation technologies has been done. The legal and economical aspects have been discussed for radiation sterilization of health care products, drugs, biomaterials and grafts. Industrial plants and radiation procedures have been described. The perspectives for further development and other industrial applications have been also discussed.

  10. Materials from seminar session of the 3.general assembly of Polish Nuclear Society; 3.Walny Zjazd Polskiego Towarzystwa Nukleonicznego. Materialy sesji seminaryjnej

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-12-31

    This publication edited as a scientific report of the Institute of Atomic Energy contains papers presented on the seminar session accompanying the 3rd General Assembly of Polish Nuclear Society. Five of these are dealing with the present situation in Poland in the framework of the following subjects: foreseeing electricity demand as a significant factor of development of electricity generation sector and nuclear option choice; present state and development trends of nuclear technique applications in industry, agriculture, health and environment protection; radioactive waste management especially related to the storage of spent fuel from EWA and MARIA research reactors; present educational problems in nuclear science and technology. The problems of nuclear power could not be excluded from the session, although it does not exist in Poland and no plans foresee it currently. The paper on nuclear power contains an extensive summary of nuclear power development worldwide, its safety problems, economic competitiveness and public acceptance. The so called ``Sellafield phenomenon`` considering the growth of leukaemia deaths of children living near that reprocessing plant in England has been commented in mass media criticizing nuclear energy application. The paper on this problem present the results of investigations and hypotheses on reasons having caused this phenomenon. The declaration of the International Council of Nuclear Societies on the role of nuclear science and technology in supporting the development is also included in the report.

  11. Isotope Shifts and Hyperfine Structure in the[Xe]4f(7)5d 6s(2) D-2(J)->[Xe]4f(7)5d 6s 6p F-9(J+1) Transitions of Gadolinium

    International Nuclear Information System (INIS)

    Blaum, K.; Bushaw, Bruce A.; Diel, S; Geppert, Ch; Kuschnick, A; Muller, P.; Nortershauser, W.; Schmitt, A.; Wendt, K.

    1999-01-01

    High-resolution resonance ionization mass spectrometry has been used to measure isotope shifts and hyperfine structure in all[Xe] 4f 7 5d 6s2 9DJ ---[Xe] 4f 7 5d 6s 6p 9FJ+1 (J= 2-6) and the[Xe] 4f 7 5d 6s2 9D6---[Xe] 4f 7 5d 6s 6p 9D5 transitions of gadolinium (Gd I). Gadolinium atoms in an atomic beam were excited with a tunable single-frequency laser in the wavelength range of 422 - 429 nm. Resonant excitation was followed by photoionization with the 363.8 nm line of an argon ion laser and resulting ions were mass separated and detected with a quadrupole mass spectrometer. Isotope shifts for all stable gadolinium isotopes in these transitions have been measured for the first time. Additionally, the hyperfine structure constants of the upper states have been derived for the isotopes 155, 157Gd and are compared with previous work. Using prior experimental values for the mean nuclear charge radii, derived from the combination of muonic atoms and electron scattering data, field shift a nd specific mass shift coefficients for the investigated transitions have been determined and nuclear charge parameters l for the minor isotopes 152, 154Gd have been calculated

  12. Electronic properties of SPFC electrodes materials. Macroscopic phenomena and effects induced by nanometric size of catalyst; Proprieta' elettroniche di materiali per elettrodi di SPFC: fenomeni macroscopici ed effetti legati alle dimensioni nanometriche del catalizzatore

    Energy Technology Data Exchange (ETDEWEB)

    Giorgi, R.; Turtu' , S. [ENEA, Centro Ricerche Casaccia, S. Maria di Galeria, RM (Italy). Dipt. Innovazione; Ascarelli, P. [Consiglio Nazionale delle Ricerche, Montelibretti, RM (Italy). Ist. di Metodologie Inorganiche Avanzate

    1999-07-01

    In this work the electronic properties and the composition of the three layers (diffusive, catalytic and outermost) are studied separately. In the first part, an anomalous behaviour of the photoemission peaks from the diffusive layer has been evidenced and correlated with the macroscopic electronic conductivity. In the second part, the electronic properties of the PT clusters are compared with the macroscopic electron conductivity. In the second part, the electronic properties of the PT clusters are compared with those of PT bulk, as a function of thermal treatment and after half-cell measurements. A correlation of the binding energy, asymmetry and width of the peaks with the different status of the metal has been attempted. [Italian] Il lavoro consiste di due parti: l'una dedicata allo studio delle caratteristiche dello strato di supporto e diffusivo, l'altra allo studio dello strato catalizzatore. Nella prima parte, la presenza anomala negli spettri XPS viene messa in relazione con la conducibilita' elettronica delle nanoparticelle metalliche in funzione delle condizioni di preparazione degli elettrodi e delle simulazioni di funzionamento. Sono messe in evidenza le problematiche connesse all'interpretazione degli spettri di fotoemissione da sistemi costituiti da particelle nanometriche, intermedi tra la condizione di atomo isolato e quella del solido, in cui gli effetti di dimensione svolgono un ruolo importante nel determinare risposte diverse ed inaspettate rispetto al comportamento del metallo massivo.

  13. Materials presented at the 27 All-Polish Seminar on the Nuclear Magnetic Resonance and its application; Materialy 27 ogolnopolskiego seminarium na temat magnetycznego rezonansu jadrowego i jego zastosowan

    Energy Technology Data Exchange (ETDEWEB)

    Hennel, J.W. [comp.

    1995-12-31

    In this report the contributions to the 27 All-Polish seminar on the Nuclear Magnetic Resonance and its Application are presented. They cover wide range of problems as NMR instrumentation, the NMR and spin relaxation theory, image analysis and computerized control systems for NMR spectrometers. The results of investigation using NMR on different scientific fields are also presented.

  14. [Vostochnoslavianskie zagovory : materialy k functional'nomu ukazateliu siuzhetov i motivov : annotirovannaia bibliografiia : ed. by T. A. Agapkina, A. L. Toporkov] = East Slavic charms : materials for a functional index of plot structures and motifs

    Index Scriptorium Estoniae

    Ryan, William F.

    2014-01-01

    Tutvustus: Агапкина, Т. А., Топорков, А. Л. Восточнославянские заговоры: Материалы к функциональному указателю сюжетов и мотивов : Аннотированная библиография. Москва : Индрик, 2014

  15. Materials presented at the 26. All-Polish Seminar on the Nuclear Magnetic Resonance and its application; Materialy 26 ogolnopolskiego seminarium na temat magnetycznego rezonansu jadrowego i jego zastosowan

    Energy Technology Data Exchange (ETDEWEB)

    Hennel, J W [comp.

    1994-12-31

    In this report the contributions to the 26. All-Polish seminar on the Nuclear Magnetic Resonance and its Application are presented. They cover wide range of problems as NMR instrumentation, the NMR and spin relaxation theory, image analysis and computerized control systems for NMR spectrometers. The results of investigation using NMR on different scientific fields are also presented.

  16. Materials presented at the 27 All-Polish Seminar on the Nuclear Magnetic Resonance and its application; Materialy 27 ogolnopolskiego seminarium na temat magnetycznego rezonansu jadrowego i jego zastosowan

    Energy Technology Data Exchange (ETDEWEB)

    Hennel, J W [comp.

    1996-12-31

    In this report the contributions to the 27 All-Polish seminar on the Nuclear Magnetic Resonance and its Application are presented. They cover wide range of problems as NMR instrumentation, the NMR and spin relaxation theory, image analysis and computerized control systems for NMR spectrometers. The results of investigation using NMR on different scientific fields are also presented.

  17. Utilization of industrial solid wastes able to generate calcium trisulphoaluminate and silicate hydrates in stabilization processes and for the manufacture of building materials; Utilizzazione di residui solidi industriali in grado di generare trisolfoalluminato e silicato di calcio idrati nei processi di stabilizzazione e nella produzione di materiali da costruzione

    Energy Technology Data Exchange (ETDEWEB)

    Santoro, L. [Naples, Univ. `Federico II` (Italy). Dipt. di Chimica; Cioffi, R. [Naples, Univ. `Federico II` (Italy). Ditp. di Ingegneria dei Materiali e della Produzione

    1998-01-01

    In this work the stabilization of hazardous solid wastes containing heavy metals has been studied by means of novel matrices able to generate calcium trisulphoaluminate and silicate hydrates. The process is based on the hydration of two different mixtures containing blast furnace slag, coal ashes, chemical gypsum and Portland cement. The stabilization capacity of the two mixtures has been checked with regard to both a residue from an incinerator of municipal solid wastes and model systems obtained by adding 5 and 10% of soluble nitrates of Cd, Cr, Cu, Ni, Pb and Zn. The stabilized products have been validated from the point of view of mechanical properties by determining the unconfined compressive strength, and from the environmental point of view by means of static and dynamic leaching tests. Both matrices have proved to have great potentiality for the stabilization of hazardous solid wastes, the one based on blast furnace slag being better. Finally, evidence is given that different leaching tests are necessary to fully understand the immobilization mechanism responsible for stabilization. [Italiano] In questo lavoro e` stata studiata la atbilizzazione di residui tossici e nocivi contenenti metalli pesanti per mezzo di matrici leganti innovative capaci di generare trisolfoalluminato e silicato di calcio idrati. Il processo e` basato sull`idratazione di due diverse miscele contenenti scoria d`alto forno, ceneri di carbone, gessi chimici e cemento Portland. Le capacita` stabilizzanti delle due miscele sono state verificate sia nei confronti di un residuo solido generato a seguito dell`incenerimento di RSU, che nei confronti di sistemi modello ottenuti aggiungendo singolarmente il 5 e 10% dei nitrati solubili di Cd, Cr, Cu, Ni, Pb e Zn. I prodotti solidi stabilizzati sono stati validati dal punto di vista delle prestazioni meccaniche mediante prove di resistenza a compressione, e dal punto di vista ambientale mediante test di rilascio sia statici che dinamici. Entrambe le matrici hanno mostrato grande potenzialita` nella stabilizzazione di residui solidi tossici e nocivi, ma quella a base di scoria d`alto forno ha fornito prestazioni migliori. Infine, e` apparsa evidente la necessita` di utilizzare differenti test di rilascio per comprendere appieno i meccanismi di immobilizzazione che intervengono nei processi di stabilizzazione.

  18. Particelle

    CERN Document Server

    Franzinetti, Carlo

    1982-01-01

    Introduzione, cenni storici ; la natura delle particelle materiali ; le interazioni fra particelle e campi ; leggi di conservazione e simmetrie ; simmetrie unitarie speciali e multipletti ; gli strumenti della ricerca sperimentale.

  19. New Materials for Sample Treatment, MS-Based Methods and Clinical Applications

    OpenAIRE

    Riboni, Nicolò

    2018-01-01

    Lo sviluppo e l’utilizzo di nuovi materiali per scopi analitici è un campo di grande interesse per la ricerca scientifica. I progressi ottenuti nell’ambito della chimica dei materiali hanno permesso lo sviluppo di nuovi metodi analitici e tecniche di estrazione caratterizzati da alte performance in termini di selettività e sensibilità. In particolare sono stati incrementati nuovi dispositivi in grado di operare in-situ e in tempo reale tramite controllo remoto, interfacciandosi con smartphone...

  20. Introduzione alla Teoria della elasticità Meccanica dei solidi continui in regime lineare elastico

    CERN Document Server

    Colombo, Luciano

    2007-01-01

    La meccanica dei solidi rappresenta un corpus di conoscenze di formidabile robustezza concettuale, di raffinata eleganza matematico-formale e di grandissima utilita’ applicativa. Come tale ha una valenza formativa molto forte in diversi campi delle scienze naturali (fisica della materia, scienza dei materiali), ingegneristiche (scienza delle costruzioni, ingegneria strutturale e meccanica) e matematiche (matematica applicata). La teoria della elasticita’costituisce inoltre uno dei punti-cardine su cui si articola il moderno paradigma di ricerca detto "modellazione multi-scala dei materiali", secondo il quale le proprieta’ di un materiale sono descritte tramite la concorrenza di metodi teorici affatto diversi: mentre alla nanoscala opera la meccanica quantistica, alla micro- e meso-scala opera il continuo. La conoscenza del continuo elastico abilita lo Studente di Fisica, di Scienza dei Materiali, di Matematica o l’Allievo Ingegnere a confrontarsi con questo moderno e affascinate strumento di ricerca s...

  1. Progettazione e disciplina dell’esoscheletro : l'inestricabile co-evoluzione tra umani e robot

    NARCIS (Netherlands)

    Fosch Villaronga, Eduard; Özcan, Beste; Pirni, A.

    2017-01-01

    Quest’articolo descrive come sia stretto il legame tra esseri umani e l’evoluzione degli esoscheletri in termini di design, di regolamentazione e di necessità umane. Mentre gli attuali esoscheletri sono ingombranti e pesanti, i progressi nei materiali e nel design concettuale cambieranno

  2. NOTES AND GLEANINGS / NOTE E CURIOSITÀ

    African Journals Online (AJOL)

    User

    però potuto prevedere il ruolo e l'utilità del cinema nella didattica delle lingue straniere. L'uso di materiali audiovisivi e di film in particolare è una prassi ormai consolidata nell'insegnamento delle lingue e i numerosi libri ed articoli scritti su questo argomento presentano un'ampia panoramica di prospettive, alcune orientate ...

  3. Creato un nuovo stato della materia

    CERN Document Server

    Valsecchi, M C

    2004-01-01

    "Nei laboratori di tutto il mondo nascono continuamente nuovi materiali plastici, leghe di metallo, molecole progettate e assemblate atomo per atomo. I ricercatori dell'Istituto nazionale di fisica nucleare hanno fatto un passo in piu': manipolando i costituenti fondamentali dei nuclei atomici, hanno creato una nuova forma di materia, radicalmente diversa da quella che noi conosciamo" (1 page)

  4. Air Force Sustainment Center Logistics and Sustainment Enterprise 2040. Version 2.0

    Science.gov (United States)

    2016-04-15

    TCIR)/ Days Away from Work, Restricted Work Activity, and/or Job Transfer ( DART ) rates in the industry. AFSC shall be a leader in material...is presented to the technician in paper -printed format widely throughout LSE maintenance operations, (13) management of paper format technical

  5. Termodinamica aspetti recenti e applicazioni alla chimica e all'ingegneria

    CERN Document Server

    Carrà, Sergio

    1990-01-01

    Dalla fine del secolo scorso la termodinamica è stata applicata allo studio delle proprietà della materia e delle sue trasformazioni e si è andata via via evolvendo interessando campi diversi, come la meccanica statistica, la fisica molecolare, le scienze ambientali, la biofisica, la scienza dei materiali e le tecnologie chimiche....

  6. Pilk kahe keelemehe pikale kirjavahetusele / Paul Alvre

    Index Scriptorium Estoniae

    Alvre, Paul

    2004-01-01

    Arvustus: Baudouin de Courtenay, Jan. Briefwechsel zwischen Jan Baudouin de Courtenay und Jooseppi J. Mikkola aus den Jahren 1898-1926 = Jan Baudouin de Courtenay i Jooseppi J. Mikkola korespondencja z lat 1898-1926 / herausgegeben von Raimo Pullat in Zusammenarbeit mit Magdalena Smoczynska. Krak̤w : Polska Akademia Umiejetnosci, 2004. (Studia i materialy do dziej̤w Polskiej Akademii Umiejetnosci ; 4)

  7. Meccanica applicata

    CERN Document Server

    Timoshenko, Stephen

    1957-01-01

    Statica : principi di statica, forze complanari concorrenti, forze complanari parallele, forze complanari nel caso generale, sistemi di forze nello spazio, principio dei lavori virtuali ; Dinamica : principi di dinamica, traslazione rettilinea, traslazione curvilinea, rotazione di un corpo rigido intorno a un asse fisso, moto piano di un corpo rigido, moto relativo, momenti d'inerzia di figure piane, momenti d'inerzia di corpi materiali.

  8. Source Hierarchy List. Volume 3. O through Z

    Science.gov (United States)

    1994-07-01

    UNIVERSIDAD NACIONAL DE CORDOBA 387102 (ARGENTINA) 01 UNIVERSIDAD NACIONAL DE CORDOBA 4O5530 (ARGENTINA) INSTITUTO DE CIENCIAS QUIMICAS ...UNIVERSIDADE ESTADUAL DE CAMPINAS 426597 (BRAZIL) 01 UNIVERSIDADE ESTADUAL DE CAMPINAS (BRAZIL) FACULDADE DE ENGENHARIA * 5133 398130 UNIVERSIDADE...UNIVERSIDADE FEDERAL DE SAD CARLOS 420497 (BRAZIL) 01 UNIVERSIDADE FEDERAL OE SAO CARLOS (BRAZIL) OEPT OE ENGENHARIA DE MATERIALIS

  9. Application of Newly Developed Rotational Sensor for Monitoring of Mining Induced Seismic Events in The Karvina region

    Czech Academy of Sciences Publication Activity Database

    Kaláb, Zdeněk; Knejzlík, Jaromír; Lednická, Markéta

    2013-01-01

    Roč. 10, č. 2 (2013), s. 197-205 ISSN 1214-9705 Institutional support: RVO:68145535 Keywords : rotational ground motion * rotational sensor * seismic monitoring Subject RIV: DC - Siesmology, Volcanology, Earth Structure Impact factor: 0.667, year: 2013 http://www.irsm.cas.cz/materialy/acta_content/2013_02/acta_170_09_Kalab_197-205.pdf

  10. Structural analysis within the Rožná and Olší uranium deposits (Strážek Moldanubicum) for the estimation of deformation and stress conditions of underground gas storage

    Czech Academy of Sciences Publication Activity Database

    Ptáček, Jiří; Melichar, R.; Hájek, Antonín; Koníček, Petr; Souček, Kamil; Staš, Lubomír; Kříž, P.; Lazárek, J.

    2013-01-01

    Roč. 10, č. 2 (2013), s. 237-246 ISSN 1214-9705 Institutional support: RVO:68145535 Keywords : structural analysis * deformation * stress * underground gas storage Subject RIV: DH - Mining, incl. Coal Mining Impact factor: 0.667, year: 2013 http://www.irsm.cas.cz/materialy/acta_content/2013_02/acta_170_13_Ptacek_237-246.pdf

  11. Pre-portland cements and geopolymers

    Czech Academy of Sciences Publication Activity Database

    Hanzlíček, Tomáš; Perná, Ivana; Ertl, Z.; Miller, S.M.

    2012-01-01

    Roč. 9, č. 1 (2012), s. 57-62 ISSN 1214-9705 Institutional research plan: CEZ:AV0Z30460519 Keywords : caementum * cement itious * calcareous cement Subject RIV: JN - Civil Engineering Impact factor: 0.530, year: 2011 http://www.irsm.cas.cz/materialy/acta_content/2012_01/5_Hanzlicek.pdf

  12. JPRS Report, Soviet Union, Kommunist, No. 14, September 1987.

    Science.gov (United States)

    1988-01-06

    archaeology , ethnography, and others. During his lifetime Vavilov collected with his expedi- tions a truly unique wealth: 160,000 live samples of... Maya 1987 Goda. Dokumenty i Materialy" [Visit to the Soviet Union by Vietnamese Communist Party 9. Vityuk, V.V and Efirov, S.A. "’Levyy’ Terrorizm na

  13. QGM Research Report

    DEFF Research Database (Denmark)

    Schaetz, Florian

    2014-01-01

    I outlined my joint work with Camilo Arias Abad (Max Planck Institute, Bonn) on higher holonomies for flat superconnections and explained some background material.......I outlined my joint work with Camilo Arias Abad (Max Planck Institute, Bonn) on higher holonomies for flat superconnections and explained some background material....

  14. Glycerol as high-permittivity liquid filler in dielectric silicone elastomers

    DEFF Research Database (Denmark)

    Mazurek, Piotr Stanislaw; Yu, Liyun; Gerhard, R.

    2016-01-01

    A recently reported novel class of elastomers was tested with respect to its dielectric properties. The new elastomer materialis based on a commercially available poly(dimethylsiloxane) composition, which has been modified by embedding glycerol droplets intoits matrix. The approach has two major ......, and the applicability ofthe models is discussed. VC 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44153....

  15. Molecules as nanomagnets

    Energy Technology Data Exchange (ETDEWEB)

    Caneschi, A.; Gatteschi, D.; Sessoli, R. [Florence Univ. (Italy). Dep. di Chimica

    1998-12-01

    The design and the synthesis of molecular clusters which give rise to slow relaxation of the magnetization at low temperature are the focus of a great interdisciplinary interest, because they provide unique materials to test the theories of quantum tunneling of the magnetization. A short review is provided here of the best systems so far discovered, outlining the possible relevance of this new class of materials to future applications. [Italiano] La progettazione e la sintesi di cluster molecolari che danno luogo a rilassamento lento della magnetizzazione a bassa temperatura sono oggetto di un grande interesse interdisciplinare, perche` sono materiali unici per mettere alla prova le teorie sugli effetti quantistici che si possono osservare in sintesi macroscopici. In questo articolo vengono brevemente passati in rassegna i migliori sistemi fin qui scoperti e vengono date alcune indicazioni per la possibile importanza di questa nuova classe di materiali per applicazioni future.

  16. Environmental policy in the 9th German Bundestag and the Bundesrat (1980-1983)

    International Nuclear Information System (INIS)

    1983-01-01

    This presentation of environmental policy constitutes the continuation of copies No. 49 and No. 72 of the 'Materialien' [Materials] (Environmental policy in the 7th German Bundestag or environmental policy in the 8. German Bundestag and in the Bundesrat, resp. - 1976 to 1980). References to factual terms espec. indications of speech references, apply to the register annexed to 'Verhandlungen des Deutschen Bundestages und des Bundesrates' (Deliberations of the German Bundestag and the Bundesrat) for the 9th period of office on which the 'Materialie' is based. Among other things, the 'Materialie' comprises: General fundamentals and primaples, aspects of structural policy, scientific and technical/technological fundamentals, organizational fundamentals, international and intergovernmental co-operation, air-borne emission abatement, waste management, chemical substances released to environment, nuclear energy. (orig./HP) [de

  17. Materials and creation in design and architecture: sharing experiences for a creative economy

    Directory of Open Access Journals (Sweden)

    Denise Dantas

    2017-04-01

    Full Text Available Entre 5 e 23 de setembro de 2016 a Faculdade de Arquitetura e Urbanismo da Universidade de São Paulo sediou o evento Materiais e Criação em Design e Arquitetura: compartilhando experiências para a economia criativa. Este evento foi organizado em parceria entre o LabDesign FAU USP e o Materiali e Design, do Politecnico di Milano, como parte das atividades do projeto Pesquisa em materiais e inovação para aplicação nas indústrias criativas nos campos do design e da arquitetura: a experiência do Politecnico di Milano trazida para o contexto brasileiro. As atividades contaram com a presença da Profa. Dra. Barbara Del Curto, docente e pesquisadora na área de materiais para o design e coordenadora do acervo Materiali e Design, materioteca na mesma instituição em funcionamento desde o ano 2000.

  18. Humic acids quality of Cambisols developed on gneiss and amphibolite

    Czech Academy of Sciences Publication Activity Database

    Pospíšilová, Ľ.; Žigová, Anna; Šťastný, Martin; Liptaj, T.

    2012-01-01

    Roč. 9, č. 4 (2012), s. 503-510 ISSN 1214-9705 R&D Projects: GA ČR GA526/08/0434 Institutional support: RVO:67985831 Keywords : Cambisols * parent material * arable soil, * grassland soil * X-ray diffraction * humic acids * SRATR FTIR and 13C NMR spectroscopy Subject RIV: DF - Soil Science Impact factor: 0.530, year: 2011 http://www.irsm.cas.cz/materialy/acta_content/2012_04/8.Pospisilova.pdf

  19. Educazione all'igiene orale ed eradicazione della carie dentale nellíinfanzia. Risultati finali di uno studio in un campione di popolazione infantile di Ferrara

    OpenAIRE

    M. Bergamini; P. Simioli; A. Stefanati; A. Grilli; P. Gregorio

    2003-01-01

    Introduzione: poichè nel 1985 l’O.M.S. collocò l’eradicazione della carie infantile fra gli obiettivi epidemiologici da raggiungere nella regione europea entro l’anno 2000, è stato effettuato uno screening microbiologico finalizzato all’isolamento di germi cariogeni nel cavo orale dei bambini.

    Materiali e metodi: secondo le procedure correnti, sono stati eseguiti tamponi gengivo-coronali in 476 bambini delle ...

  20. The characterization of the Ca–K geopolymer/solidified fluid fly-ash interlayer

    Czech Academy of Sciences Publication Activity Database

    Perná, Ivana; Šupová, Monika; Hanzlíček, Tomáš

    2017-01-01

    Roč. 61, č. 1 (2017), s. 26-33 ISSN 0862-5468 Institutional support: RVO:67985891 Keywords : fluid fly ash * blast-furnace slag * geopolymer * interlayer * recycling Subject RIV: DM - Solid Waste and Recycling OBOR OECD: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics Impact factor: 0.439, year: 2016 https://www.irsm.cas.cz/materialy/cs_content/2016_doi/Perna_CS_2016_0056.pdf

  1. Current Induced Seismicity in the Paskov Mine Field

    Czech Academy of Sciences Publication Activity Database

    Holub, Karel; Rušajová, Jana; Holečko, J.

    2013-01-01

    Roč. 10, č. 2 (2013), s. 181-187 ISSN 1214-9705 R&D Projects: GA MŠk LM2010008 Institutional support: RVO:68145535 Keywords : Ostrava-Karviná coal mines * seismic network * induced seismicity * location plot Subject RIV: DC - Siesmology, Volcanology, Earth Structure Impact factor: 0.667, year: 2013 http://www.irsm.cas.cz/materialy/acta_content/2013_02/acta_170_07_%20Holub_181-187.pdf

  2. Environmental Record in Soils on Loess in Northern Moravia, Czech Republic

    Czech Academy of Sciences Publication Activity Database

    Žigová, Anna; Šťastný, Martin

    2006-01-01

    Roč. 3, č. 4 (2006), s. 33-39 ISSN 1214-9705 R&D Projects: GA AV ČR IAA300130504 Institutional research plan: CEZ:AV0Z30130516; CEZ:AV0Z30460519 Keywords : evolution of soil cover * micromorphological analysis * clay mineralogy Subject RIV: DF - Soil Science https://www.irsm.cas.cz/materialy/acta_content/2006_04/033-039%20Zigova.pdf

  3. Study of the effect of moisture content and bending rate on the fracture toughness of rocks

    Czech Academy of Sciences Publication Activity Database

    Vavro, Leona; Souček, Kamil

    2013-01-01

    Roč. 10, č. 2 (2013), s. 247-253 ISSN 1214-9705 R&D Projects: GA MŠk ED2.1.00/03.0082 Institutional support: RVO:68145535 Keywords : fracture toughness * bending rate * tensile strength Subject RIV: DB - Geology ; Mineralogy Impact factor: 0.667, year: 2013 http://www.irsm.cas.cz/materialy/acta_content/2013_02/acta_170_14_Vavro_Soucek_247-253.pdf

  4. Design Of a Fixed-Dome Ferrocement Biodigester Built Partiall y Underground

    OpenAIRE

    Marianela de la Caridad Ortiz Alvarez; Hugo Rafael Wainshtok Rivas; Henry Hernández Sotomayor

    2016-01-01

    The analysis, structural design and constructive sequence of a fixed-dome biodigester built partially underground and using ferrocement as construction material under normal work conditions is in this paper developed. The biodigester capacity is 24 m3 and it is composed by a semispherical dome (cover), cylindricalwalls (body) and a circular slab(bottom). The biodigester using ferrocement as construction materialis in agreement with the service guaranty requirements settled for the established...

  5. Fisica dello stato solido

    CERN Document Server

    Bassani, Franco

    2000-01-01

    Il volume è un manuale introduttivo allo studio delle proprietà dei materiali cristallini. Mentre gli argomenti trattati sono quelli tipici di un testo di base (diffrazione, bande elettroniche, fononi, proprietà di trasporto, metalli e semiconduttori, proprietà ottiche e magnetiche...), caratteristica peculiare di questa opera che la differenzia da analoghi manuali in lingua italiana e inglese è l'uso intensivo delle proprietà di simmetria dei sistemi in studio ricavate dalla teoria dei gruppi.

  6. Preceedings of the International Congress (12th), Corrosion Control for Low-Cost Reliability, Held in Houston, Texas on September 19 -24, 1993. Volume 4. Oil/Gas/Pipeline

    Science.gov (United States)

    1993-09-24

    Milano, Italy G. Rondelli, B.Vicentini CNR - Istituto Tecnologia Materiali - Via Bassini, 15, 20133, Milano, Italy Abstract Environmental cracking of...21.8 11.1 0.69 199 Moderale 20%-40% 25.4 8.7 0.29 371 Moderale 3D %,50% 23.5 10.8 0.54 412 Severe >50% 30.3 10.8 0.00 53 1991 and 1992 data only. 2744

  7. 20th International Conference on Solid State Ionics (SSI 20)

    Science.gov (United States)

    2016-05-20

    Italy; 2CNST @PoliMI, Istituto Italiano di Tecnologia , Milano, Italy; 3Physical Chemistry of Solids, Max Planck Institute for Solid State Research...Coughlin5; 1Chemical Sciences, University of Padova, Padova, Italy; 2Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali...Germany; 2Instituto de Tecnologia Quimica , Valencia, Spain; 3Ernst Ruska Center, Jülich, Germany. 4:50 PM J5.05 Hydrogen Permeation through CO2-Stable

  8. Phonolite weathering profiles at Mariánská hora Hill, České středohoří Mts., and sorption properties of clay residues

    Czech Academy of Sciences Publication Activity Database

    Novák, Jiří Karel; Melka, Karel; Ulrych, Jaromír; Řanda, Zdeněk

    2005-01-01

    Roč. 2, 2 /138/ (2005), s. 135-149 ISSN 1211-1910. [Conference on Clay Mineralogy and Petrology /17./. Prague, 13.09.2004-17.09.2004] R&D Projects: GA AV ČR IAA3048201 Institutional research plan: CEZ:AV0Z3013912; CEZ:AV0Z1048901 Keywords : phonolite * weathering * saprolite Subject RIV: DB - Geology ; Mineralogy https://www.irsm.cas.cz/materialy/acta_content/2005_02/17_Novak.pdf

  9. L’Area archeologica di Santusangius-Serrenti (Sud Sardegna e la questione del ʽvillaggio scomparsoʼ di Monpusi

    Directory of Open Access Journals (Sweden)

    Daniele Carta

    2017-11-01

    Full Text Available Riassunto. Lo studio delle fonti storico-archivistiche e delle evidenze materiali in località Bruncu Pubusa/Santusangius, importante sito tra l’Età nuragica e quella romana, pone in luce come quello che alcuni Autori ritengono essere un villaggio spopolato nel basso medioevo (Monpusi non sia in realtà mai esistito in tale periodo e con il nome citato.

  10. EKOLOGIJA LESENE GRADNJE

    OpenAIRE

    Kuhelnik, Lidija

    2011-01-01

    Diplomska naloga obravnava sisteme lesene montažne gradnje. Opisani so vsi trije sistemi, torej skeletni, okvirni in masivni. Obravnavani so lesni kompoziti za konstrukcije. V nadaljevanju je obravnavana gradbena biologija in zelena trajnostna gradnja. Podrobno je opisana zdrava hiša in njeni materiali. Predstavljen je tudi sindrom nezdrave zgradbe. Opisana je konstrukcijska zaščita lesa in modifikacija lesa.

  11. Conocimiento de los riesgos del tabaquismo en fumadores, exfumadores y no fumadores

    OpenAIRE

    Ruiz Mori, Enrique; Profesor de Fisiología y Fisiopatología. Facultad de Medicina Universidad de San Martín de Porres; Ruiz Mori, Hernán; Profesor de Fisiología y Fisiopatología. Facultad de Medicina Universidad de San Martín de Porres; Salazar-Rojas, Ronald; Alumnos de la Facultad de Medicina USMP.; Torres-Mallma, Cristina; Alumnos de la Facultad de Medicina USMP.; Valer-Villanueva, Sergio; Alumnos de la Facultad de Medicina USMP. Sociedad de Estudiantes de Medicina de la Universidad de San Martín de Porres (SOCIEM-USMP); Santiago, Brendy; Alumnos de la Facultad de Medicina USMP. Sociedad de Estudiantes de Medicina de la Universidad de San Martín de Porres (SOCIEM-USMP); Blas-Rodriguez, Humberto Joel; Alumnos de la Facultad de Medicina USMP.; Vásquez Tornero, Cindy; Alumnos de la Facultad de Medicina USMP.; Guevara Gonzales, Leslye; Alumnos de la Facultad de Medicina USMP. Sociedad de Estudiantes de Medicina de la Universidad de San Martín de Porres (SOCIEM-USMP)

    2016-01-01

    Objetivo:Determinar en una población de no fumadores, fumadores y exfumadores, el nivel de conocimiento sobre los peligrosyriesgosenlasaludquegeneraeltabaquismo.MaterialyMétodos:Esunestudioepidemiológico,observacional,descriptivoytransversal,queserealizóensetiembre del2015enlaciudaddeLimayelCallao.Seaplicóunaencuestaamayoresde18años.Losparticipantesfuerondivididos entresgrupos,fumadores,exfumadoresyno-fumadores.Resultados:Seincluyerona2270sujetos,744eranfumadores,752exfumadoresy774no-fumadore...

  12. SULL'AUMENTO DI TEMPERATURA NEL MANTELLO DELLA TERRA PER COMPRESSIONE ADIABATICA

    Directory of Open Access Journals (Sweden)

    P. E. Valle

    1951-06-01

    Full Text Available Viene stabilita una relazione fra la densità, la temperatura e lavelocità delle onde longitudinali e trasversali relativa ad una particolaretrasformazione adiabatica di un solido ideale.L'equazione, applicata al mantello della. Terra, conduce al risultatoche la temperatura in prossimità del nucleo sarebbe circa 1,24volte, la temperatura alla profondità di 1000 km, se la compressionedei materiali fosse avvenuta adiabaticamente.

  13. Polycyclic aromatic hydrocarbons and other organic compounds in ashes from biomass combustion

    Czech Academy of Sciences Publication Activity Database

    Straka, Pavel; Havelcová, Martina

    2012-01-01

    Roč. 9, č. 4 (2012), s. 481-490 ISSN 1214-9705 R&D Projects: GA MZe QI102A207 Institutional research plan: CEZ:AV0Z30460519 Keywords : biomass combustion * ash * PAHs Subject RIV: GD - Fertilization, Irrigation, Soil Processing Impact factor: 0.530, year: 2011 http://www.irsm.cas.cz/materialy/acta_content/2012_04/6.Straka_%20Havelcova.pdf

  14. Immagini della luce nelle Epistulae di Seneca.

    OpenAIRE

    Zudini, Giulia

    2008-01-01

    2006/2007 Studiare gli ambiti metaforici cui Seneca attinge con maggior frequenza nella sua opera filosofica è un mezzo per avvicinare molti aspetti della sua cultura stilistico-retorica e, allo stesso tempo, del suo mondo ideologico e psicologico. Oltre ai realia – alle realtà sociali, politiche, materiali del mondo che lo circonda – l’immaginario di Seneca accoglie e contribuisce a convogliare soprattutto realtà culturali: esse si traducono in immagini che rivelano le convergenze tra la ...

  15. Much ado about nothing? Sustainability disclosure in the banking industry

    OpenAIRE

    Hummel, Katrin; Festl-Pell, Diana Brigitte

    2015-01-01

    This paper examines the sustainability disclosure in the banking industry with respect to potential greenwashing. We build a theoretical framework to assess the sustainability disclosure along materiali-ty criteria in the banking industry and apply this framework to the corporate sustainability reporting of two global systemically important banks. The results of our case study point toward the existence of greenwashing mainly in the most material area of the sustainability disclosure of our s...

  16. TEHNOLOGIJA UPORABE FRP KOMPOZITOV, TER BETONOV VISOKE IN ULTRA VISOKE TRDNOSTI V GRADBENIH KONSTRUKCIJAH

    OpenAIRE

    Kos, Kevin

    2016-01-01

    Beton je kot konstrukcijski material še vedno najbolj uporabljen material. Betonska konstrukcija, armirana z jeklom, zahteva nenehno vzdrževanje, saj v nasprotnem primeru zaradi korozije betona in jekla armiranobetonski objekti sčasoma propadajo. Polimerni kompoziti ali FRP (ang. Fibre Reinforced Polymers) so materiali, ki se po svetu uporabljajo v vse namene. Vedno več pa se uporabljajo tudi v namene grajenja, saj zaradi dobrih lastnosti konkurirajo armirnemu jeklu v betonskih konstrukcij...

  17. Ricerca clinico-epidemiologica sullo stato di salute del cavo orale nei pazienti tossicodipendenti

    OpenAIRE

    Bromo, Francesco

    2010-01-01

    Obiettivo: Lo scopo della ricerca è stato quello di mettere in evidenza la presenza di patologie del cavo orale in soggetti tossicodipendenti Materiali e Metodi: Sono stati reclutati 71 pazienti in terapia di recupero presso la Comunità Incontro di Amelia. I soggetti sono stati sottoposti a visite clinico-anamnestiche adottando una cartella clinica da noi stessi costruita. Risultati: Dei 71 soggetti tossicodipendenti, 42 facevano uso di eroina e 39 assumevano droghe per v...

  18. The realization of strong, stray static magnetic fields

    Czech Academy of Sciences Publication Activity Database

    Žežulka, Václav; Straka, Pavel

    2012-01-01

    Roč. 9, č. 1 (2012), s. 71-77 ISSN 1214-9705 Institutional research plan: CEZ:AV0Z30460519 Keywords : magnetic fields * magnetic circuits * permanent NdFeB magnets Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 0.530, year: 2011 http://www.irsm.cas.cz/materialy/acta_content/2012_01/7_Zezulka.pdf

  19. Analysis of inner structure changes of concretes exposed to high temperatures using micro X-ray computed tomography

    Czech Academy of Sciences Publication Activity Database

    Sitek, Libor; Bodnárová, L.; Souček, Kamil; Staš, Lubomír; Gurková, Lucie

    2015-01-01

    Roč. 12, č. 1 (2015), s. 78-89 ISSN 1214-9705 R&D Projects: GA ČR GAP104/12/1988 Institutional support: RVO:68145535 Keywords : concrete * cement paste * aggregate * high temperature Subject RIV: JQ - Machines ; Tools Impact factor: 0.561, year: 2015 https://www.irsm.cas.cz/materialy/acta_content/2015_doi/Sitek_AGG_2015_0009.pdf

  20. Seismicity, groundwater level variations and Earth tides in the Hronov-Poříčí Fault Zone, Czech Republic

    Czech Academy of Sciences Publication Activity Database

    Kolínský, Petr; Valenta, Jan; Gaždová, Renata

    2012-01-01

    Roč. 9, č. 2 (2012), s. 191-209 ISSN 1214-9705 R&D Projects: GA ČR GA205/09/1244 Institutional research plan: CEZ:AV0Z30460519 Keywords : Eastern Bohemian Massif * groundwater level * seismic ity Subject RIV: DC - Siesmology, Volcanology, Earth Structure Impact factor: 0.530, year: 2011 http://www.irsm.cas.cz/materialy/acta_content/2012_02/9_Kolinsky.pdf

  1. MOOCs and academic libraries: a chance or a problem? An overview

    Directory of Open Access Journals (Sweden)

    Laura Testoni

    2013-11-01

    Nella seconda parte parte dell'articolo si focalizza l'attenzione sulle possibili interazioni tra MOOCs e biblioteche accademiche, concentrandosi sui temi seguenti: coinvolgimento e ruolo dei bibliotecari nell'implementazione dei MOOCs; gestione del copyright all'interno dei materiali didattici che costituiscono un corso; information literacy; advocacy della biblioteca; impatto dei MOOCs nei servizi informativi forniti dalle biblioteche accademiche.

  2. Veryfying the Possibilities of Using a 3D Laser Scanner in the Mining Underground

    Czech Academy of Sciences Publication Activity Database

    Kajzar, Vlastimil; Kukutsch, Radovan; Heroldová, Nikola

    2015-01-01

    Roč. 12, č. 1 (2015), s. 51-58 ISSN 1214-9705 R&D Projects: GA MŠk(CZ) LO1406; GA MŠk ED2.1.00/03.0082 Institutional support: RVO:68145535 Keywords : HDS * laser scanning * convergence measurement Subject RIV: DH - Mining , incl. Coal Mining Impact factor: 0.561, year: 2015 https://www.irsm.cas.cz/materialy/acta_content/2015_doi/Kajzar_AGG_2015_0004.pdf

  3. Problemi di stabilità negli elementi in vetro strutturale e studio innovativo di facciate in vetro-acciaio sottoposte a carico da esplosione

    OpenAIRE

    Bedon, Chiara

    2012-01-01

    2010/2011 Recentemente, la richiesta architettonica sempre più spinta di trasparenza e luminosità ha favorito la diffusione nell’edilizia del vetro come materiale da costruzione. Sebbene si tratti di un materiale ancora poco conosciuto rispetto ad altri materiali convenzionali, il vetro trova, infatti, ampia applicazione nelle realizzazioni strutturali più innovative. Anche se le soluzioni architettoniche proposte trovano ampio consenso, spesso la difficoltà principale consiste nel di...

  4. An Analysis of Aviation Maintenance Operations and Supporting Costs, and Cost Capturing Systems

    Science.gov (United States)

    2012-12-04

    the La Mesa Parent Teacher Association. = ^Åèìáëáíáçå=oÉëÉ~êÅÜ=mêçÖê~ã= do^ar^qb=p`elli=lc=_rpfkbpp=C=mr_if`=mlif`v= = - vii -= k^s^i=mlpqdo^ar^qb=p...host.uniroma3.it/facolta/ economia /db/materiali/insegnamenti/588_3930.pdf Cost Analysis Improvement Group (CAIG). (2007). Office of the Secretary of

  5. Video e comunicazione scientifica. Il laboratorio MELA dell’Università di Bologna

    Directory of Open Access Journals (Sweden)

    Laura Corazza

    2010-07-01

    Full Text Available Al Media Education e-learning LAboratorio del Dipartimento di Scienze dell’educazione e della Facoltà di Scienze della formazione, Università di Bologna, un gruppo di esperti e di tecnici svolge attività di supporto alla didattica e alla ricerca, lavorando con i docenti per produrre audiovisivi e materiali multimediali. I prodotti MELA sono video per l’approfondimento culturale, per la produzione scientifica, per la documentazione.

  6. Fitotossine di Inula viscosa per il controllo di piante parassite

    OpenAIRE

    Avolio, Fabiana

    2013-01-01

    Le piante parassite sono incapaci di sintetizzare dagli elementi minerali e nutritivi materiali sufficienti per la loro crescita e sopperiscono a questa deficienza fisiologica utilizzando le sostanze elaborate dalle piante ospiti, che di conseguenza manifestano generalmente una crescita ridotta. Le Orobanche, la Striga e la Cuscuta sono le piante parassite più diffuse nelle regioni del Mediterraneo e del continente africano interessando colture di rilevanza strategica. Diverse strategie...

  7. Results of repeated measurements at the Železné hory – Tišnov fault system surroundings

    Czech Academy of Sciences Publication Activity Database

    Švábenský, O.; Pospíšil, L.; Weigel, J.; Roštínský, Pavel; Witiska, M.

    2014-01-01

    Roč. 11, č. 3 (2014), s. 211-223 ISSN 1214-9705 Grant - others:GA MŠk(CZ) 2.1.00/03.0097 Institutional support: RVO:68145535 Keywords : Železné hory – Tišnov tectonic zone * GPS * movement tendencies Subject RIV: DE - Earth Magnetism, Geodesy, Geography Impact factor: 0.389, year: 2014 http://www.irsm.cas.cz/materialy/acta_content/2014_doi/Svabensky_AGG_2014_0009.pdf

  8. Geodynamic risk zone at northern part of the Boskovice Furrow

    Czech Academy of Sciences Publication Activity Database

    Pospíšil, L.; Švábenský, O.; Roštínský, Pavel; Nováková, Eva; Weigel, J.

    2017-01-01

    Roč. 14, č. 1 (2017), s. 113-129 ISSN 1214-9705 Institutional support: RVO:68145535 Keywords : Boskovice Furrow * Nectava – Konice Fault * horizontal and vertical velocities Subject RIV: DE - Earth Magnetism, Geodesy, Geography OBOR OECD: Geology Impact factor: 0.699, year: 2016 https://www.irsm.cas.cz/materialy/acta_content/2016_doi/Pospisil_AGG_2016_0033.pdf

  9. Sperimentare e simulare la fisica attraverso la manipolazione e l’uso di tecnologie didattiche

    Directory of Open Access Journals (Sweden)

    Eugenia Lucia Bossio

    2013-03-01

    Full Text Available Nell'ambito di una ricerca volta a investigare la possibilità di presentare la teoria del caos, un tema della fisica assai ostico per i non specialisti, a studenti di scuole medie e superiori, sono stati sviluppati e raccolti una serie di materiali didattici. Il presente lavoro descrive gli strumenti utilizzati per le sperimentazioni nelle scuole descritte in un altro articolo1 contenuto in questo stesso numero della rivista. Le tematiche scientifiche sono state poste sotto una veste accattivante al fine di suscitare curiosità. Si è provveduto, inoltre, a strutturare i materiali didattici in maniera da proporre dei percorsi formativi poliedrici e diversificati anche tramite l'uso delle tecnologie informatiche. Lo sviluppo e la raccolta di applicativi multimediali, facilmente reperibili in rete, ha contribuito alla realizzazione di un pacchetto di strumenti che, nel suo insieme, consente un’applicazione didattica efficace realizzata più volte nel corso delle sperimentazioni compiute presso le scuole. Nel seguito saranno descritti gli elementi elettrici ed elettronici per la costruzione di un circuito elettronico che mostra un comportamento caotico e le varie operazioni necessarie per realizzarlo, gli strumenti informatici utili per la visualizzazione, su di un calcolatore, del segnale di tensione prodotto dal circuito, infine, i diversi software attraverso cui è possibile realizzare la simulazione del circuito elettronico e la visualizzazione delle traiettorie caotiche. Sono presentati, infine, i test di verifica e alcuni altri materiali didattici utilizzati durante le sperimentazioni già realizzate.

  10. State of the art on bioethanol production; Stato dell'arte della produzione di bioetanolo

    Energy Technology Data Exchange (ETDEWEB)

    Barisano, D; De Bari, I; Viola, E; Zimbardi, F; Braccio, G [ENEA, Divisione Fonti Rinnovabili di Energia, Centro Ricerche Trisaia, Policoro, Matera (Italy); Cantarella, M; Gallifuoco, A [L' Aquila Univ., L' Aquila (Italy). Dipt. di Ingegneria Chimica e dei Materiali

    2001-07-01

    The state of the art, deals with the ethanol production from current processes based on the use of sugar and starch as feedstock and those under development based on lignocellulosic biomass. In the first section are reported the commercially available processes together with hints to the newest technologies. As regard the ethanol production from lignocellulosics, it has been collected data on the biomass availability in Europe as energy crops, industrial crops, agricultural residues and domestic waste. It is provided a bibliographic study on the technologies and processes under development worldwide for the conversion of lignocellulosics into ethanol. Finally, a brief discussion on the economics highlights the near term viability of producing ethanol by this way. [Italian] Questo lavoro tratta della produzione di etanolo da diverse biomasse, compreso i materiali lignocellulosici. Sono riportati cenni al mercato mondiale ed europeo dell'etanolo insieme ad una breve rassegna dei processi impiegati correntemente; si tratta per lo piu' di tecnologie ormai mature basate sull'utilizzo di piante ad alto contenuto di zucchero o di amido. Per quanto riguarda la produzione di etanolo da biomasse lignocellulosiche, sono riportati i risultati di un'indagine statistica sulla disponibilita' in Europa di questi materiali in termini di coltivazini dedicate, residui agro-forestali e rifiuti domestici. E' riportata altresi una ricerca bibliografica sui recenti sviluppi dei processi di conversione a etanolo su scala banco e pilota. Infine, una breve discussione sugli aspetti economici connessi all'utilizzo di materiali lignocellulosici per la produzione di etanolo mostra come questi processi si stiano avvicinando alla completa fattibilita'.

  11. State of the art on bioethanol production; Stato dell'arte della produzione di bioetanolo

    Energy Technology Data Exchange (ETDEWEB)

    Barisano, D.; De Bari, I.; Viola, E.; Zimbardi, F.; Braccio, G. [ENEA, Divisione Fonti Rinnovabili di Energia, Centro Ricerche Trisaia, Policoro, Matera (Italy); Cantarella, M.; Gallifuoco, A. [L' Aquila Univ., L' Aquila (Italy). Dipt. di Ingegneria Chimica e dei Materiali

    2001-07-01

    The state of the art, deals with the ethanol production from current processes based on the use of sugar and starch as feedstock and those under development based on lignocellulosic biomass. In the first section are reported the commercially available processes together with hints to the newest technologies. As regard the ethanol production from lignocellulosics, it has been collected data on the biomass availability in Europe as energy crops, industrial crops, agricultural residues and domestic waste. It is provided a bibliographic study on the technologies and processes under development worldwide for the conversion of lignocellulosics into ethanol. Finally, a brief discussion on the economics highlights the near term viability of producing ethanol by this way. [Italian] Questo lavoro tratta della produzione di etanolo da diverse biomasse, compreso i materiali lignocellulosici. Sono riportati cenni al mercato mondiale ed europeo dell'etanolo insieme ad una breve rassegna dei processi impiegati correntemente; si tratta per lo piu' di tecnologie ormai mature basate sull'utilizzo di piante ad alto contenuto di zucchero o di amido. Per quanto riguarda la produzione di etanolo da biomasse lignocellulosiche, sono riportati i risultati di un'indagine statistica sulla disponibilita' in Europa di questi materiali in termini di coltivazini dedicate, residui agro-forestali e rifiuti domestici. E' riportata altresi una ricerca bibliografica sui recenti sviluppi dei processi di conversione a etanolo su scala banco e pilota. Infine, una breve discussione sugli aspetti economici connessi all'utilizzo di materiali lignocellulosici per la produzione di etanolo mostra come questi processi si stiano avvicinando alla completa fattibilita'.

  12. IZOLACIJA α- IN β- PINENA IZ RASTLINSKIH MATERIALOV

    OpenAIRE

    Lekše, Simona

    2011-01-01

    Materiali rastlinskega izvora, med njimi tudi navadna smreka (Picea abies), vsebujejo substance, ki nastajajo v presnovi med razvojem rastline in se kopičijo v različnih delih rastlin. Prav tako te zdravilne rastline vsebujejo spojine, ki imajo številne specifične farmakološke in tehnološke vrednote. V diplomski nalogi smo raziskali različne postopke izolacije hlapnih aromatskih substanc (α- in β- pinena) iz lubja, žagovine in iglic navadne smreke. Izolacija monoterpenov je potekala s postopk...

  13. Characterizing gas permeability and pore properties of Czech granitic rocks

    Czech Academy of Sciences Publication Activity Database

    Konečný, Pavel; Kožušníková, Alena

    2016-01-01

    Roč. 13, č. 4 (2016), s. 331-338 ISSN 1214-9705 R&D Projects: GA ČR GA105/09/0089; GA MŠk(CZ) LO1406; GA MŠk ED2.1.00/03.0082 Institutional support: RVO:68145535 Keywords : granitic rocks * permeability * pore properties Subject RIV: DB - Geology ; Mineralogy Impact factor: 0.699, year: 2016 https://www.irsm.cas.cz/materialy/acta_content/2016_doi/Konecny_AGG_2016_0015.pdf

  14. Inflation and Instability of a Polymeric Membrane

    DEFF Research Database (Denmark)

    Neergaard, Jesper; Hassager, Ole

    1999-01-01

    We consider an axisymmetric polymeric membrane inflated by a uniform pressure difference acting across the membrane. The polymeric materialis described by an arbitrary combination of a viscoelastic and a purely viscous component to the stress. Some viscoelastic materials described by a Mooney......-Rivlin model show a monotone increasingpressure during inflation of a spherical membrane. These materials develop a homogeneous membrane thickness in agreement with the Considere-Pearson condition. Molecularly based models such as the neo-Hookean, Doi-Edwards or Tom-Pom model show a pressure maximum when...... inflated. Membranesdescribed by these models develop a local thinning of the membrane which may lead to bursting in finite time....

  15. Vanadium oxide based cpd. useful as a cathode active material - is used in lithium or alkali metal batteries to prolong life cycles

    DEFF Research Database (Denmark)

    1997-01-01

    A mixt. of metallic iron particles and vanadium pentoxide contg. V in its pentavalent state in a liq. is reacted to convert at least some of the pentavalent V to its tetravalent state and form a gel. The liq. phase is then sepd. from the oxide based gel to obtain a solid material(I) comprising Fe......, V and oxygen where at least some of the V is in the tetravalent state. USE-(I) is a cathode active material in electric current producing storage cells. ADVANTAGE-Use of (I) in Li or alkali metal batteries gives prolonged life cycles.Storage cells using (I) have improved capacity during charge...

  16. Numeriske tåger

    DEFF Research Database (Denmark)

    Knakkergaard, Martin

    2015-01-01

    med dette talpar omtyder vi alt, hvad der lader sig omtyde, til tabeller i en ustoppelig bevægelse, som efterlader det omtydede til glemsel og nostalgi. Afhængig af hvordan vi anskuer disse tabeller, i det rene Aristoteliske perspektiv eller i Heideggers mere spekulative optik, er det enten causa...... finalis eller causa efficiens, som tabellerne fremstiller for os, men hvad blev der af causa materialis og causa formalis undervejs? Og at producere betyder netop at stille frem, at fremstille - dette vægter ifølge sagens natur det 'stillads' - den teknik eller teknologi - gennem hvilket noget stilles...

  17. Dose evaluation for workers employed in an industry involving enamel paints containing zirconium silicate; Valutazione di dose per i lavoratori occupati in una industria che utilizza vernici a smalto contenenti silicato di zirconio

    Energy Technology Data Exchange (ETDEWEB)

    Castellani, C.M.; Berico, M.; De Zaiacomo, T.; Formignani, M.; Ianni, A.; Nobili, C.; Sandri, S.; Vasselli, R. [ENEA, Centro Ricerche Ezio Clementel, Bologna (Italy). Dipt. Ambiente

    1999-07-01

    In the frame of the European Recommendations for radiological protection, an evaluation of the annual dose has been made for workers employed in an industry for the production of sanitary equipment involving the use of enamel paints containing zirconium silicate. [Italian] Nella prospettiva dell'applicazione della direttiva europea relativa alla protezione radiologica dei lavoratori, vengono presentati i risultati relativi alla valutazione di dose annuale complessiva per i lavoratori occupati in una industria per la produzione di articoli igienico-sanitari che utilizza vernici a smalto contenenti silicato di zirconio. Il fine e' la valutazione del problema radioprotezionistico per gli addetti a causa delle impurezza radioattive presenti nei materiali utlizzati.

  18. PENDIDIKAN ANAK KREATIF PERSPEKTIF PROFETIK

    Directory of Open Access Journals (Sweden)

    Moh. Roqib

    2014-12-01

    Full Text Available Semua muslim bercita-cita untuk maju dengan identitas seorang Muslim dan Indonesia yang baik. Upaya yang dilakukan selama ini dengan mengadopsi pemikiran dan model pendidikan Barat yang dianggap modern dan maju. Namun, hasil pendidikannya memiliki kelemahan, seperti munculnya perilaku amoral, pemalas, korup, hedonis, dan materialis. Berbeda dengan pendidikan Barat, pendidikan profetik menjadikan sosok Nabi sebagai acuan pengembangan pendidikan Islam.  Berdasarkan pada filsafat profetik, pendidikan Islam digerakkan untuk maju secara integratif dan tidak menyisakan problem dan mampu membentuk peserta didik yang religius dan kreatif serta membentuk komunitas terbaik (khair ummah di lingkungannya masing-masing. 

  19. Le seriazioni nel processo di formazione dei canzonieri francesi: alcuni aspetti significativi

    Directory of Open Access Journals (Sweden)

    Stefano Resconi

    2014-07-01

    Full Text Available Attraverso l’analisi di seriazioni di componimenti, il contributo formula alcune riflessioni sulle modalità di formazione dei canzonieri lirici francesi: particolare attenzione è dedicata al riconoscimento della fisionomia dei materiali disponibili ai piani medî e alti della tradizione, e alle relative ripercussioni sui criterî di organizzazione interna delle raccolte.By analyzing sequences of poems, the essay aims to discuss the formation of French lyric chansonniers, with particular attention to the features of sources available in the early stages of the manuscript tradition, and their consequences on the internal organization of the anthologies. 

  20. SIGNIFAKANSI MAQAMAT DAN AMALAN PADA PENDIDIKAN TASAWUF DALAM PERUBAHAN TINGKAH LAKU MANUSIA

    Directory of Open Access Journals (Sweden)

    Mihmidaty

    2014-05-01

    Full Text Available Masyarakat dewasa ini cenderung mengikuti gaya hidup materialistic hedonistic. Pada umumnya kontak antar manusia atas dasar prinsip-prinsip fungsional, pragmatis, materialis. Manusia yang seperti itu ternyata tidak bahagia dan diliputi kegelisahan, sehingga terjadi kekeringan spiritual. Oleh karena itu sebagian manusia kembali kepada nilai-nilai keagamaan, cenderung ke arah spiritualisme. Pendidikan tasawuf merupakan alternatif untuk mengatasi masalah ini. Pendidiknya adalah seorang guru yang ma’rifat (mengenal rahasia Ketuhanan yang diberi kemampuan oleh Allah SWT untuk membimbing jiwa menuju pada kedekatan dengan Allah SWT dan mencapai kebahagiaan yang hakiki, melalui ajaran maqamat dan amalan-amalan tertentu secara disiplin, sehingga dapat menimbulkan perubahan tingkah laku.

  1. Dove sta andando l'analisi musicale? Riflessioni sul VII EuroMac

    Directory of Open Access Journals (Sweden)

    Mario Baroni

    2014-01-01

    Full Text Available Come tutti i lettori della Rivista ormai sapranno, si è svolto a Roma dal 29 settembre al 2 ottobre di quest’anno, presso il Conservatorio di S. Cecilia, il settimo convegno europeo di analisi musicale (VII European Music Analysis Conference ossia VII EuroMac. Nel convegno, organizzato dal GATM e diretto da Giorgio Sanguinetti, sono state presentate 197 relazioni e svolti otto laboratori. Tutti i materiali sono stati riassunti in un volume (Programme and Abstract Book, Iter Edizioni di Subiaco curato da Egidio Pozzi e Antonio Cascelli.

  2. Ipotesi progettuale di rigenerazione urbana: il caso di studio dell’ex Caserma Monti già Convento di S. Maria della Ripa nella città di Forlì

    Directory of Open Access Journals (Sweden)

    Alessandro Castagnoli

    2011-12-01

    Full Text Available Un’ampia area dismessa nel centro della città storica, è stata considerata l’opportunità strategica per valorizzare e rigenerare anche interi brani di tessuto urbano circostante con l’obiettivo di riammagliare gli sfrangiamenti materiali e immateriali nel complesso rapporto fra passato, presente e futuro.Questo caso di studio ha consentito di approfondire un approccio meta progettuale più generale, puntando sulla ricerca di una metodologia appropriata rispetto alla progettazione dello spazio architettonico in quanto tale, con l’obiettivo di sviluppare ragionamenti di compatibilità nell’ambito della vasta tematica del riuso urbano ed edilizio.

  3. Effect of high temperatures on cement composite materials in concrete structures

    Czech Academy of Sciences Publication Activity Database

    Bodnárová, L.; Válek, J.; Sitek, Libor; Foldyna, Josef

    2013-01-01

    Roč. 10, č. 2 (2013), s. 173-180 ISSN 1214-9705 R&D Projects: GA MŠk ED2.1.00/03.0082; GA ČR GAP104/12/1988 Institutional support: RVO:68145535 Keywords : high temperature * load resistance * concrete * reinforcing of mine works * fiber reinforcement Subject RIV: JJ - Other Materials Impact factor: 0.667, year: 2013 http://www.irsm.cas.cz/materialy/acta_content/2013_02/acta_170_06_Bodnirovi_173-180.pdf

  4. Analysis of Inner Structure Changes of Concretes Exposed to High Temperatures Using Micro X-ray Computed Tomography

    Czech Academy of Sciences Publication Activity Database

    Sitek, Libor; Bodnárová, L.; Souček, Kamil; Staš, Lubomír; Gurková, Lucie

    2015-01-01

    Roč. 12, č. 1 (2015), s. 79-89 ISSN 1214-9705 R&D Projects: GA MŠk(CZ) LO1406; GA ČR GAP104/12/1988; GA MŠk ED2.1.00/03.0082 Institutional support: RVO:68145535 Keywords : concrete * cement paste * aggregate * high temperature Subject RIV: JQ - Machines ; Tools Impact factor: 0.561, year: 2015 https://www.irsm.cas.cz/materialy/acta_content/2015_doi/Sitek_AGG_2015_0009.pdf

  5. Ketorolaco versus Metamizol en el tratamiento del dolor posoperatorio en niños

    OpenAIRE

    Palo Núñez, Gloria Pamella; Hospital II Cañete Essalud; Jiménez Castro, Jesús Orlando; Hospital San José Callao MINSA

    2015-01-01

    Objetivo:Evaluar la efectividad de Ketorolaco y Metamizol en el tratamiento del dolor agudo posoperatorio de adenoamigdalectomías en niños de tres a seis años atendidos en el Servicio de Anestesiología en el Hospital Alberto Sabogal Sologuren durante el periodo 2012-2013.MaterialyMétodos:Estudio observacional, descriptivo, retrospectivo y transversal. La investigación incluyó 115 niños que fueron sometidos de forma electiva a adenoamigdalectomías cuyas edades estuvieron comprendidas entre los...

  6. Mechanism of rigid overlaying of carboniferous strata failure in face mining in the case of multiseams deposit

    Czech Academy of Sciences Publication Activity Database

    Jiránková, E.; Staš, Lubomír; Kajzar, Vlastimil; Doležalová, Hana

    2013-01-01

    Roč. 10, č. 2 (2013), s. 189-195 ISSN 1214-9705 R&D Projects: GA MŠk ED2.1.00/03.0082; GA MV VG20102014034 Institutional support: RVO:68145535 Keywords : subsidence trough * rock mass * overlaying strata * longwall mining * tensor stress measurement Subject RIV: DH - Mining, incl. Coal Mining Impact factor: 0.667, year: 2013 http://www.irsm.cas.cz/materialy/acta_content/2013_02/acta_170_08_Jirankova_189-195.pdf

  7. Stability of the old mine workings in the Jeroným at Čistá, Sokolov District

    Czech Academy of Sciences Publication Activity Database

    Kukutsch, Radovan; Žůrek, P.; Kořínek, R.

    2012-01-01

    Roč. 135, č. 42 (2012), s. 67-74 ISSN 0324-9670 Institutional support: RVO:68145535 Keywords : Jeroným Mine in Čistá * stability * geomechanical monitoring * old mine workings Subject RIV: DH - Mining , incl. Coal Mining http://yadda.icm.edu.pl/baztech/element/bwmeta1.element.baztech-article-BPW6-0029-0005?q=bwmeta1.element.baztech-volume-0370-0798-prace_naukowe_instytutu_gornictwa_politechniki_wroclawskiej__studia_i_materialy-2012-vol__135_nr_42;4&qt=CHILDREN-STATELESS

  8. Removal of chemical alterations produced by environmental pollution on 16. century frescoed mortars

    Energy Technology Data Exchange (ETDEWEB)

    Campanella, L.; Marinucci, F.; Tomassetti, M. [Rome Univ. La Sapienza, Rome (Italy). Dipt. di Chimica

    1999-10-01

    The paper describes and discusses the results obtained by analyzing the materials and pigments used to paint three important frescoes in Vatican palace (Rome, Italy), using several instrumental and mineralogical techniques and microchemical assays. The results obtained are also discussed with special reference to the effectiveness of the various cleaning solutions used. [Italian] Vengono descritti e discussi i risultati ottenuti analizzando i materiali e i pigmenti utilizzati negli affreschi delle antiche Stanze del Vaticano (Roma), adoperando alcune moderne tecniche strumentali e mineralogiche e saggi microchimici. E' stata anche valutata la diversa efficienza delle differenti soluzioni impiegate nell'operazione di pulitura.

  9. Fistole retto-vaginali Crohn-relate trattate mediante trasposizione del muscolo gracile: risultati a lungo termine e qualità della vita

    OpenAIRE

    Tassone, Daniela

    2015-01-01

    OBIETTIVO: Le fistole retto-vaginali Crohn-relate hanno un impatto significativo sulla qualità della vita. Quando il canale anale è alterato da ulcerazioni e stenosi o in pazienti con difetti estesi del perineo, la chirurgia locale produce risultati insoddisfacenti. Lo scopo di questo studio è quello di valutare l'efficacia della trasposizione del muscolo gracile nelle fistole retto-vaginali Crohn-relate e determinare i suoi effetti sulla qualità della vita. MATERIALI E METODI: Da gennaio...

  10. Bizarre marriages: Weddings as a form of legitimization of intimate relations with non-human agents

    Directory of Open Access Journals (Sweden)

    Jan Stasieńko

    2015-10-01

    Full Text Available L’articolo presenta il caso di un matrimonio tra l’utente di una Nintendo DS, Sal9000, e un personaggio del videogame Love Plus, Nene Anegasaki, come esempio della più ampia pratica di far sposare oggetti materiali e immateriali che caratterizza la community Objectum Sexuals. Il testo analizza le forme di intimità e i codici di comunicazione che si creano tra umani e oggetti e presenta pratiche pseudo-legali di matrimonio come manifesti dell’apertura alla relazionità postumana.

  11. CONTENUTO DI URANIO E TORIO NELLE METEORITI

    Directory of Open Access Journals (Sweden)

    M. SANTANGELO

    1955-06-01

    Full Text Available Molti ricercatori in questi ultimi anni si sono interessati al problema
    della composizione delle meteoriti; dai risultati sperimentali si
    è cercato trarre elementi circa la genesi di questi materiali, questione
    ancora aperta, ed avere informazioni sui processi chimici e termodinamici
    cui le meteoriti furono soggette prima della loro caduta sulla
    terra.
    Uno degli aspetti del problema è quello dell'abbondanza percentuale
    degli elementi chimici e della loro composizione isotopica nella
    materia meteorica dei diversi tipi : ciò perché esso è connesso con
    quello piii generale dell'origine e distribuzione degli elementi nel cosmo
    e nella terra, nonché con quello dell'età delle meteoriti (l .
    In un recente lavoro Urey e collaboratori (-, esaminando un gran
    numero di analisi chimiche effettuate su questi materiali, sono pervenuti
    alla formulazione di alcuni criteri di classificazione in base alla
    percentuale dei componenti più abbondanti ed alla presenza o meno
    di disomogeneità strutturali nella massa fondamentale. Fra gli elementi
    meno abbondanti presentano particolare interesse quelli delle due famiglie
    radioattive naturali Torio e Uranio; le loro concentrazioni sono
    state determinate per alcune meteoriti siliciche (stonv ineteorites e
    per qualcuna ferrica (iron meteorites

  12. Scuolavisione: ipervideo e formazione professionale

    Directory of Open Access Journals (Sweden)

    Alberto Cattaneo

    2013-03-01

    Full Text Available Che l’uso dell’immagine possa avere un ruolo interessante nel contesto scolastico non è certo una novità, e più volte la scuola ha tentato – con alterne vicende – di sfruttare questa potenzialità. Lo stesso potremmo dire sia avvenuto con la multimedialità, e in particolare con il ricorso ai collegamenti ipertestuali per riprodurre una logica reticolare piuttosto che lineare. Cosa succede però quando tentiamo di combinare le due possibilità in un’unica soluzione? È possibile integrare in un supporto multimediale materiali audiovisivi e di altro genere? Come è possibile utilizzare tale supporto per l’insegnamento? È lecito aspettarsi degli effetti positivi sull’apprendimento?Da interrogativi come questi nasce Scuolavisione, un progetto che vuole sfruttare la possibilità di rendere interattivi brevi estratti video, al fine di favorire l’apprendimento, realizzando la duplice ambizione di permettere a tutti i docenti di personalizzare e strutturare materiale da utilizzare durante le proprie attività didattiche e di condividere con i colleghi gli stessi materiali. Il contributo presenta nel dettaglio gli strumenti offerti dal progetto e le prospettive future.

  13. Organic luminescent materials. First results on synthesis and characterization of Alq{sub 3} thin films

    Energy Technology Data Exchange (ETDEWEB)

    Baldacchini, G.; Gagliardi, S.; Montereali, R.M.; Pace, A. [ENEA, Centro Ricerche Frascati, Frascati, RM (Italy). Div. Fisica Applicata; Balaji Pode, R. [Nagpur University, Nagpur (India). Dept. of Physics

    2000-07-01

    Inorganic semiconductor diodes brought a technological revolution in the field of efficient light and laser sources in the last 20 years. New development in this field are expected from organic compounds, thanks to their low cost of synthesis and the relative easiness of growth as thin films. In particular, electrically pumped luminescent devices based on organic thin layers are among the most promising systems for next generation flat panel displays and semiconductor lasers. The tris - (8-hydroxy quinoline)-aluminium complex-Alq{sub 3} - is one of the most studied electro luminescent materials. In this paper, after a short introduction regarding historical development in the field, are reported preliminary results on the growth of Alq{sub 3} films and on their optical and spectroscopic characterization. [Italian] Negli ultimi 20 anni i diodi semiconduttori hanno portato una rivoluzione tecnologica nel campo delle sorgenti luminose e laser. Un nuovo sviluppo possibile in questo campo sono i composti organici, grazie al basso costo di sintesi e la relativa facilita' di crescerli in forma di film sottile. In particolare, dispositivi luminescenti pompati elettricamente basati su film sottili di materiali organici sono promettenti per una nuova generazione di display per schermi piatti e laser a Alq{sub 3} e' uno dei materiali elettroluminescenti piu' studiati. In questo rapporto, dopo una breve introduzione sullo sviluppo storico in questo campo, presentiamo i nostri primi risultati sulla crescita e caratterizzazione ottica di film di Alq{sub 3}.

  14. Mahlburg's Work on Crank Functions

    Indian Academy of Sciences (India)

    IAS Admin

    640–651, 2006. [8]. G N Watson, Ramanujan's Vermutung uber zerfallungsanzahlen, J. Reine Angew Math., Vol.179, pp.97–128, 1938. [9]. J Lehner, Ramanujan identities involving the partition function for the moduli 11α, Amer. J. Math.

  15. Ablation of Liquids for Laser Propulsion With TEA CO2 Laser

    National Research Council Canada - National Science Library

    Sinko, John; Kodgis, Lisa; Porter, Simon; Sterling, Enrique; Lin, Jun; Pakhomov, Andrew V; Larson, C. W; Mead, Jr., Franklin B

    2005-01-01

    .... A Transversely Excited at Atmospheric pressure (TEA) CO2 laser operated at 10.6 um, 300 ns pulse width, and 9 J pulse energy was used to ablate liquids contained in various aluminum and glass vessels...

  16. Ablation of Liquids for Laser Propulsion with TEA CO2 Laser

    National Research Council Canada - National Science Library

    Sinko, John; Kodgis, Lisa; Porter, Simon; Sterling, Enrique; Lin, Jun; Pakhomov, Andrew V; Larson, C. W; Mead, Jr, Franklin B

    2005-01-01

    .... A Transversely Excited at Atmospheric pressure (TEA) CO2 laser operated at 10.6 micro-m, 300 ns pulse width, and 9 J pulse energy was used to ablate liquids contained in various aluminum and glass vessels...

  17. CSIR ScienceScope: Science for a sustainable earth

    CSIR Research Space (South Africa)

    CSIR

    2008-06-01

    Full Text Available .................................................................................6 W9rl5-Jame5 Jauna 5e?tr9ying the Kar99? ..................................................................................................9 Fir?t ntate 9J the Air Rep9rt ?he5? light 9n the ?eemingly invi... .....................................................................................................Y0 Ec9n9mic? 9J wa?te management: the way J9rwar5 ...................................................................................Y6 nnap?h9t Jr9m the ?,y...

  18. Synthesis and pharmacological characterization of novel N-(trans-4-(2-(4-(benzo[d]isothiazol-3-yl)piperazin-1-yl)ethyl)cyclohexyl)amides as potential multireceptor atypical antipsychotics.

    Science.gov (United States)

    Chen, Xiao-Wen; Sun, Yuan-Yuan; Fu, Lei; Li, Jian-Qi

    2016-11-10

    A series of novel benzisothiazolylpiperazine derivatives combining potent dopamine D2 and D3, and serotonin 5-HT1A and 5-HT2A receptor properties were synthesized and evaluated for their potential antipsychotic properties. The most-promising derivative was 9j. The unique pharmacological features of 9j were a high affinity for D2, D3, 5-HT1A, and 5-HT2A receptors, together with a 20-fold selectivity for the D3 versus D2 subtype, and a low affinity for muscarinic M1 (reducing the risk of anticholinergic side effects), and for hERG channels (reducing incidence of QT interval prolongation). In animal behavioral models, 9j inhibited the locomotor-stimulating effects of phencyclidine, blocked conditioned avoidance response, and improved the cognitive deficit in the novel object recognition tests in rats. 9j exhibited a low potential for catalepsy, consistent with results with risperidone. In addition, favorable brain penetration of 9j in rats was detected. These studies have demonstrated that 9j is a potential atypical antipsychotic candidate. Copyright © 2016 Elsevier Masson SAS. All rights reserved.

  19. Lezioni di meccanica razionale con elementi di statica grafica

    CERN Document Server

    Sbrana, Francesco

    1950-01-01

    Elementi di calcolo vettoriale ; riduzione di un sistema qualunque di vettori applicati ; trattazione analitica dei sistemi di vettori applicati ; uso dei poligni funicolari per la composizione di più vettori applicati complanari ; vettori variabili ; cinematica del punto ; studio del moto di un punto in un piano in coordinate polari ; cinematica de sistemi rigidi ; moto di un sistema rigido con un punto fisso (moto rigido sferico) ; moto relativo ; sistemi di punti in general, vincoli ; concetti e postulati fondamentali della meccanica ; unità mecchaniche, omogeneità, modelli ; equilibrio di un punto e di un sistema di punti materiali ; statica dei solidi indeformabili (sistemi rigidi) ; sistemi deformabili, travature reticolari ; equilibrio dei poligoni funicolari e delle curve funicolari ; nozioni sull'attrito ; integrazione grafica ; baricentri ; momenti d'inerzia ; calcolo grafico dei momenti statici e dei momenti d'inerzia dei sistemi piani ; dinamica del punto libero ; dinamica del punto vincolato ;...

  20. River-bed erosion due to changing boundary conditions: performance of a protective measure

    Directory of Open Access Journals (Sweden)

    D. Termini

    2014-09-01

    Full Text Available Due to the introduction of man-made sediment barriers along a river, the amount of sediment load entering the downstream river reach is different to that leaving the reach, and erosion processes occur downstream of the barrier itself. Designers are often required to take into account the scouring process and to include adequate protective measures against the local scour. This paper addresses the performance of bio-engineering protective measures against the erosion process. In particular, a green carpet, realized with real flexible vegetation, has been used as the protective measure against erosion processes downstream of a rigid bed. Analyses are based on experimental work carried out in a straight channel constructed at the laboratory of the Dipartimento di Ingegneria Civile, Ambientale, Aereospaziale, dei Materiali, Palermo University (Italy.

  1. Enzo Croatto, Vocabolario ampezzano, Cortina d'Ampezzo, 1986; XXX + 426 pagine.Enzo Croatto, Vocabolario ampezzano, Cortina d'Ampezzo, 1986; XXX + 426 pagine

    Directory of Open Access Journals (Sweden)

    Mitja Skubic

    1997-12-01

    Full Text Available Il  prof. Enzo Croatto si dichiara solo coordinatore di questo vocabolario, ma i  suoi meriti non sono pochi. E' vero che ha raccolto oltre alle inchieste dirette anche fonti già pubblicate, soprattutto il vocabolario di Angelo Majoni, pubblicato nel lontano 1929, che ottenne delle lodi da parte del grande conoscitore del lessico e della vita nelle Dolomiti che fu Carlo Battisti; però ha arricchito il vocabolario aggiungendo le inchieste dirette e anche i materiali dell'AIS e del (mai pubblicato ALI, nonché il materiale che contiene il Vocabolario provvisorio della parlata ampezzana, pubblicato nei fascicoli tra il 1974 e il 1977. Il vocabolario fornisce anche informazioni grammaticali, ad es. sulla formazione del plurale dei nomi o sulle forme verbali le quali, per i così detti verbi irregolari, appaiono per intero

  2. Note di fotonica

    CERN Document Server

    Degiorgio, Vittorio

    2016-01-01

    L’invenzione del laser ha generato una vera rivoluzione nella scienza e nella tecnologia e ha dato luogo alla nascita di una nuova disciplina chiamata Fotonica. Le applicazioni della Fotonica che hanno un impatto cruciale in molti ambiti della nostra vita sono le comunicazioni in fibra ottica su cui si basa il funzionamento di Internet e del traffico telefonico su grandi distanze, i dischi ottici (CD, DVD, Blu-ray), la sensoristica ottica di tipo industriale e ambientale, la lavorazione dei materiali e la chirurgia con il laser, l’illuminazione con i LED. Questa seconda edizione contiene diversi ampliamenti e modifiche al testo pubblicato nel 2012, che ha colmato un vuoto nel panorama italiano di testi universitari riguardanti la Fotonica. Dopo avere esposto in modo sintetico ma rigoroso i concetti che stanno alla base del funzionamento del laser e della propagazione della luce nella materia, sono descritti i principali componenti e dispositivi ottici e optoelettronici, quali le fibre ottiche, gli amplifi...

  3. A technical report on the evaluation of the integrity for the TIG welded spacer grid

    International Nuclear Information System (INIS)

    Song, Kee Nam; Yoo, Ho Sik; Lww, Chang Woo

    1994-07-01

    The spacer grid, which supports fuel rods, guide thimble and instrumentation tube, is classified into two types according to their strap material,.ie. inconel and zircaloy spacer grid. KOFA fuel of 14 x 14 and 17 x 17 type has seven and eight spacer grid respectively. Zircaloy spacer grid is assembled by straps whose cross points are welded by TIG welding method. This technical report provides to give some information about structure and function of the spacer grid and the basis and characteristic of the TIG welding method. A series of test which is conducted to evaluate the integrity of TIG welded zircaloy spacer grid and their results have been also studied. (Author) 18 refs., 23 figs., 3 tabs

  4. A technical report on the evaluation of the integrity for the TIG welded spacer grid

    Energy Technology Data Exchange (ETDEWEB)

    Song, Kee Nam; Yoo, Ho Sik; Lww, Chang Woo [Korea Atomic Energy Research Institute, Taejon (Korea, Republic of)

    1994-07-01

    The spacer grid, which supports fuel rods, guide thimble and instrumentation tube, is classified into two types according to their strap material,.ie. inconel and zircaloy spacer grid. KOFA fuel of 14 x 14 and 17 x 17 type has seven and eight spacer grid respectively. Zircaloy spacer grid is assembled by straps whose cross points are welded by TIG welding method. This technical report provides to give some information about structure and function of the spacer grid and the basis and characteristic of the TIG welding method. A series of test which is conducted to evaluate the integrity of TIG welded zircaloy spacer grid and their results have been also studied. (Author) 18 refs., 23 figs., 3 tabs.

  5. Producing Films, Producing Meanings: Some Theoretical Reflections

    Directory of Open Access Journals (Sweden)

    Giorgio Grignaffini

    2015-01-01

    Full Text Available L'articolo si pone l'obiettivo di stimolare una maggiore attenzione da parte della semiotica del cinema alle pratiche produttive e ai materiali preparatori del film, finora poco studiati rispetto alle dinamiche che i testi stessi attivano sulla ricezione. Tale proposta di allargamento del campo di ricerca, viene approfondita nelle sue premesse teoriche in due momenti. Dapprima viene contestualizzata rispetto alla pratica dell'analisi semiotica "tradizionale"; poi, utilizzando gli strumenti della sociosemiotica elaborata da Eric Landowski, in particolare sfruttando il concetto di "aggiustamento" sviluppato nel quadro della riflessione sulle modalità di interazione, vengono evidenziati campi di applicazione (ad es. il lavoro del regista con l’attore e possibili vantaggi euristici.

  6. CORRIGENDUM: Atoms riding Rayleigh waves Atoms riding Rayleigh waves

    Science.gov (United States)

    Benedek, G.; Echenique, P. M.; Toennies, J. P.; Traeger, F.

    2010-09-01

    In the original paper the affiliation list is incorrect. The correct address list is as follows: G Benedek1, 5, P M Echenique1, 2, J P Toennies3 and F Traeger4 1 Donostia International Physics Center (DIPC), Paseo Manuel de Lardizábal 4, 20018 Donostia—San Sebastián, Spain 2 Departamento de Física de Materiales and CFM (CSIC-UPV/EHU), Universidad del País Vasco/Euskal Herriko Unibertsitatea, E-20018 San Sebastián/Donostia, Spain 3 Max Planck-Institut für Dynamik und Selbstorganisation, Bunsenstraße 10 D-37073 Göttingen, Germany 4 Fakultät für Chemie und Biochemie, Ruhr-Universität Bochum Universitätsstraße 150, 44801 Bochum, Germany 5 Permanent address: Dipartimento di Scienza dei Materiali, Universitá di Milano-Bicocca, Via Cozzi 53, 20125 Milano, Italy

  7. I corpi disponibili dei lavoratori senza progetti

    Directory of Open Access Journals (Sweden)

    Andrea Pietrantoni

    2011-07-01

    Full Text Available Quei lavoratori senza progetti, cui sarcasticamente si allude nel titolo, debbono essere sempre pronti ad un nuovo incarico (non a caso si parla di missione, capaci di immaginarsi in nuove attività, plastici e performanti; traggono la loro motivazione e un’improbabile compensazione in un’impiegabilità, sempre revocabile e provvisoria, che trasforma il lavoro in una ricerca trobadorica, in un percorso spirituale. La possibilità di accedere ad un’occupazione è vincolata a un continuo rimodellamento della proprie caratteristiche, attitudini, abilità, con un dispendio di risorse, materiali e simboliche, che supera ampiamente la riorganizzazione di tempi e spazi di vita in funzione della produttività imposta dal fordismo, o l’iperidentificazione con il proprio lavoro nel senso weberiano del sentirsi vocati a ciò che si fa.

  8. La tradizione di Peire d’Alvernhe e altri appunti

    Directory of Open Access Journals (Sweden)

    Giorgio Barachini

    2014-07-01

    Full Text Available L’articolo si propone di studiare i canali attraverso i quali l’opera di Peire d’Alvernhe ha raggiunto l’età di compilazione dei canzonieri provenzali. Il contributo analizza il numero e la disposizione dei testi conservati in ciascun canzoniere e, passando attraverso lo studio della varia lectio, individua sei fonti principali, di cui tre tra le più antiche a noi note (tradizione musicale, tradizione catalana, tradizione italiana ε+β. Inoltre, lo studio tenta di astrarre dal caso concreto di Peire d’Alvernhe alcuni comportamenti tipici dei compilatori dei canzonieri: operazioni di recensione di materiali di diversa provenienza, loro organizzazione in sezioni d’autore più complete, eventuale collazione dei materiali ed eventuale revisione testuale. Lo studio puntuale della sezione di Peire d’Alvernhe in ogni ms. ha permesso infine di rettificare alcune sviste che persistevano nella tradizione di studi. The paper aims to study the channels through which Peire d’Alvernhe’s poetry was able to reach the time when the Provençal chansonniers have been produced. Analysing the number and disposition of the texts preserved by each manuscript, and taking into account the lessons found in the varia lectio, it’s possible to recognize six main sources: among them we find the musical tradition, the Catalan tradition and the Italian tradition ε+β, which are three of the most ancient sources of Provençal poetry. In addition, the particular case of Peire d’Alvernhe unfolds some aspects of the work of the medieval ‘editors’: recension of texts coming from different sources, their organisation in a new completer authorial section, their possible collation and textual editing. Finally, it’s possible to rectify some oversights found in previous bibliography. 

  9. Analysis of the situation of the vacuum in FTU; Analisi della situazione del vuoto di FTU (Resoconto del lavoro svolto dalla task force)

    Energy Technology Data Exchange (ETDEWEB)

    Alessandrini, C.; Angelini, B.; Apicella, M.L.; Mazzitelli, G.; Pirani, S.; Zanza, V. [ENEA, Centro Ricerche Frascati, Rome (Italy). Dipt. Energia

    1999-01-01

    To analyze the situation of the vacuum in the FTU tokamak, on 22/5/96 was set up a task force to identify the problem(s) and to settle the operative and cleaning procedures. The main actions of the task force were: leak tests, automatic procedure to monitor on line the state of the machine vacuum and an exhaustive analysis of the work done before. The task force reviewed the outgassing measurements of the plastic materials inserted into the machine and was decided to repeat the test on the thermocouples. The results pointed out that the thermocouples are a practically infinite reservoir of water. The outcome of the task force was a set of new procedures and recommendations during both the operation of FTU and the shutdown periods. FTU is now operating at more acceptable plasma purity. [Italiano] Il 22/5/96 fu costituita una Task Force (TF) per analizzare le cause della `non pulizia` di FTU e per identificare le nuove procedure da seguire per la pulizia della camera da vuoto. Le azioni che la TF intraprese furono: leak tests, monitoraggio continuo dello stato del vuoto e revisione critica del lavoro fatto precedentemente. Vennero poi analizzate delle misure fatte a suo tempo sui materiali presenti nella camera da vuoto di FTU e, nel caso delle termocoppie, si decise di ripetere il test. Da questa seconda prova emerse che i cilindretti di queste termocoppie sono delle riserve inesauribili di acqua che vengono alimentate da ogni riapertura della macchina. Il lavoro della TF si concluse con una serie di procedure e raccomandazioni, da seguire prima di ogni riapertura della macchina e durante le campagne sperimentali a macchina fredda; tali procedure tengono conto del fatto che negli anni e` aumentata la quantita` di materiali plastici presenti nella camera da vuoto, soprattutto nei ports. FTU sta attualmente operando in condizioni piu` accettabili di pulizia della camera.

  10. Archeologia e storia del cantiere di costruzione

    Directory of Open Access Journals (Sweden)

    Mannoni, Tiziano

    2002-12-01

    Full Text Available The history of architecture, for more than two centuries, has tried to understand the buildings using written sources, reaching in this way an outstanding specialisation.The very most recent building archaeology is trying to make the built heritage itself speak about its history, even that of the construction site.The archaeological data (stratigraphic sequences, archaeological dating, materials and building techniques, put in dialogue with the archaeometric data (natural watches; characteristics, provenience and preciousness of the materials and following the rules of the “cultura materiale” - material culture - (empirical way of doing apprehension and transmission, allow us to begin the study of the builders choices, their possibilities and their motivations (archaeological critic. At this point, the research makes a real qualitative and quantitative jump if we read again, with an archaeological eye, all the written data coming from tenders, public permissions, construction site computations and from the ancient estimations and appraisals.La storia dell’architettura per più di duecento anni ha cercato di capire la costruzione attraverso le fonti scritte, raggiungendo in ciò una notevole specializzazione. La assai più recente archeologia dell’architettura sta cercando di far parlare il costruito stesso sulla sua storia, ivi compresa quella del cantiere di costruzione. I dati archeologici (sequenze stratigrafiche, datazioni archeologiche, materiali e tecniche costruttive, fatti dialogare con i dati archeometrici (orologi naturali, provenienze, caratteristiche e rarità dei materiali, secondo le regole della cultura materiale (apprendimento e trasmissione del saper fare empirico, permettono di affrontare la conoscenza delle scelte effettuate dai costruttori, le loro possibilità e le loro motivazioni (critica archeologica. E’ a questo punto che la ricerca fa un vero salto di qualità e di quantità se si rileggono con l

  11. 17 CFR 248.3 - Definitions.

    Science.gov (United States)

    2010-04-01

    ... 1940 (15 U.S.C. 80a-2(a)(9)). (j) Customer means a consumer who has a customer relationship with you. (k)(1) Customer relationship means a continuing relationship between a consumer and you under which... provide brokerage services to the individual or establish a continuing relationship with the individual...

  12. 21 CFR 101.36 - Nutrition labeling of dietary supplements.

    Science.gov (United States)

    2010-04-01

    ... or linear fashion, and indented under the term “Proprietary Blend” or other appropriately descriptive... (consumer packages) or 10 percent of the number of packages in the same inspection lot, whichever is smaller....9(j)(1) for foods that are offered for sale by a person who makes direct sales to consumers (i.e., a...

  13. Search for the weak decay eta ' -> K-+/-pi(-/+) and precise measurement of the branching fraction B(J/psi -> phi eta ')

    NARCIS (Netherlands)

    Haddadi, Z.; Kalantar-Nayestanaki, N.; Kavatsyuk, M.; Löhner, H.; Messchendorp, J. G.; Tiemens, M.

    2016-01-01

    We present the first search for the rare decay of eta' into K-+/- pi(-/+) in J/psi -> phi eta', using a sample of 1.3 x 10(9) J/psi events collected with the BESIII detector. No significant signal is observed, and the upper limit at the 90% confidence level for the ratio B(eta' -> K-+/-

  14. Processing of C60 thin films by Matrix-Assisted Pulsed Laser Evaporation (MAPLE)

    DEFF Research Database (Denmark)

    Canulescu, Stela; Schou, Jørgen; Fæster, Søren

    2011-01-01

    Thin films of fullerenes (C60) were deposited onto silicon using matrix-assisted pulsed laser evaporation (MAPLE). The deposition was carried out from a frozen homogeneous dilute solution of C60 in anisole (0.67 wt%), and over a broad range of laser fluences, from 0.15 J/cm2 up to 3.9 J/cm2. MAPLE...

  15. Density excitations of a harmonically trapped ideal gas

    Indian Academy of Sciences (India)

    †Worked as a summer student fellow of the Indian Academy of Sciences for six weeks. 83 ... Motivation for calculating the dynamical structure factor is its ...... [9] J P Hansen and I R McDonald, Theory of simple liquids (Academic Press, London.

  16. The development and validation of a new collision processor for MONK

    International Nuclear Information System (INIS)

    Connolly, Simon; Grimstone, Malcolm

    2003-01-01

    This paper summarises the progress with a major development project for the MONK Monte Carlo criticality code, namely the development of a new collision processing modelling package and nuclear data library. The development has now reached the final validation stage and further results will become available over the coming months in the period leading up the release of MONK9. (J.P.N.)

  17. Magnetic Surfaces, Thin Films, and Multilayers

    Science.gov (United States)

    1992-01-01

    58 ACKNOWLEDGEMENTS. The authors of this paper would like to acknowledge many useful discussions with Mike Weinert. This work is supported in part by... Sharples , J. Mater. Res. 3, 856 (1988). 9. J.A. Thornton, J. Vac. Technol. A4, 3059 (1986). 10. O.K. Andersen, J. Madsen, U.K. Poulsen, 0. Jepsen, and J

  18. Observation of an Anomalous Line Shape of the eta 'pi(+)pi(-) Mass Spectrum near the p(p)over-bar Mass Threshold in J/psi -> gamma eta 'pi(+)pi(-)

    NARCIS (Netherlands)

    Ablikim, M.; Achasov, M. N.; Ahmed, S.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Ferroli, R. Baldini; Ban, Y.; Bennett, D. W.; Bennett, J. V.; Berger, N.; Bertani, M.; Bettoni, D.; Bian, J. M.; Bianchi, F.; Boger, E.; Boyko, I.; Briere, R. A.; Cai, H.; Cai, X.; Cakir, O.; Calcaterra, A.; Cao, G. F.; Cetin, S. A.; Chang, J. F.; Chelkov, G.; Chen, G.; Chen, H. S.; Chen, H. Y.; Chen, J. C.; Chen, M. L.; Chen, S.; Chen, S. J.; Chen, X.; Chen, X. R.; Chen, Y. B.; Cheng, H. P.; Chu, X. K.; Cibinetto, G.; Dai, H. L.; Dai, J. P.; Dbeyssi, A.; Dedovich, D.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; De Mori, F.; Ding, Y.; Dong, C.; Dong, J.; Dong, L. Y.; Dong, M. Y.; Dou, Z. L.; Du, S. X.; Duan, P. F.; Fan, J. Z.; Fang, J.; Fang, S. S.; Fang, X.; Fang, Y.; Farinelli, R.; Fava, L.; Fedorov, O.; Feldbauer, F.; Felici, G.; Feng, C. Q.; Fioravanti, E.; Fritsch, M.; Fu, C. D.; Gao, Q.; Gao, X. L.; Gao, X. Y.; Gao, Y.; Gao, Z.; Garzia, I.; Goetzen, K.; Gong, L.; Gong, W. X.; Gradl, W.; Greco, M.; Gu, M. H.; Gu, Y. T.; Guan, Y. H.; Guo, A. Q.; Guo, L. B.; Guo, R. P.; Guo, Y.; Guo, Y. P.; Haddadi, Z.; Hafner, A.; Han, S.; Hao, X. Q.; Harris, F. A.; He, K. L.; Heinsius, F. H.; Held, T.; Heng, Y. K.; Holtmann, T.; Hou, Z. L.; Hu, C.; Hu, H. M.; Hu, J. F.; Hu, T.; Hu, Y.; Huang, G. S.; Huang, Y. P.; Huang, J. S.; Huang, X. T.; Huang, X. Z.; Huang, Y.; Huang, Z. L.; Hussain, T.; Ji, Q.; Ji, Q. P.; Ji, X. B.; Ji, X. L.; Jiang, L. W.; Jiang, X. S.; Jiang, X. Y.; Jiao, J. B.; Jiao, Z.; Jin, D. P.; Jin, S.; Johansson, T.; Julin, A.; Kalantar-Nayestanaki, N.; Kang, X. L.; Kang, X. S.; Kavatsyuk, M.; Ke, B. C.; Kiese, P.; Kliemt, R.; Kloss, B.; Kolcu, O. B.; Kopf, B.; Kornicer, M.; Kupsc, A.; Kuehn, W.; Lange, J. S.; Lara, M.; Larin, P.; Leithoff, H.; Leng, C.; Li, C.; Li, Cheng; Li, D. M.; Li, F.; Li, F. Y.; Li, G.; Li, H. B.; Li, H. J.; Li, J. C.; Li, Jin; Li, K.; Li, K.; Li, Lei; Li, P. R.; Li, Q. Y.; Li, T.; Li, W. D.; Li, W. G.; Li, X. L.; Li, X. N.; Li, X. Q.; Li, Y. B.; Li, Z. B.; Liang, H.; Liang, Y. F.; Liang, Y. T.; Liao, G. R.; Lin, D. X.; Liu, B.; Liu, B. J.; Liu, C. X.; Liu, D.; Liu, F. H.; Liu, Fang; Liu, Feng; Liu, H. B.; Liu, H. H.; Liu, H. H.; Liu, H. M.; Liu, J.; Liu, J. B.; Liu, J. P.; Liu, J. Y.; Liu, K.; Liu, K. Y.; Liu, L. D.; Liu, P. L.; Liu, Q.; Liu, S. B.; Liu, X.; Liu, Y. B.; Liu, Y. Y.; Liu, Z. A.; Liu, Zhiqing; Loehner, H.; Lou, X. C.; Lu, H. J.; Lu, J. G.; Lu, Y.; Lu, Y. P.; Luo, C. L.; Luo, M. X.; Luo, T.; Luo, X. L.; Lyu, X. R.; Ma, F. C.; Ma, H. L.; Ma, L. L.; Ma, M. M.; Ma, Q. M.; Ma, T.; Ma, X. N.; Ma, X. Y.; Ma, Y. M.; Maas, F. E.; Maggiora, M.; Malik, Q. A.; Mao, Y. J.; Mao, Z. P.; Marcello, S.; Messchendorp, J. G.; Mezzadri, G.; Min, J.; Min, T. J.; Mitchell, R. E.; Mo, X. H.; Mo, Y. J.; Morales, C. Morales; Muchnoi, N. Yu.; Muramatsu, H.; Musiol, P.; Nefedov, Y.; Nerling, F.; Nikolaev, I. B.; Ning, Z.; Nisar, S.; Niu, S. L.; Niu, X. Y.; Olsen, S. L.; Ouyang, Q.; Pacetti, S.; Pan, Y.; Patteri, P.; Pelizaeus, M.; Peng, H. P.; Peters, K.; Pettersson, J.; Ping, J. L.; Ping, R. G.; Poling, R.; Prasad, V.; Qi, H. R.; Qi, M.; Qian, S.; Qiao, C. F.; Qin, L. Q.; Qin, N.; Qin, X. S.; Qin, Z. H.; Qiu, J. F.; Rashid, K. H.; Redmer, C. F.; Ripka, M.; Rong, G.; Rosner, C. H.; Ruan, X. D.; Sarantsev, A.; Savrie, M.; Schnier, C.; Schoenning, K.; Schumann, S.; Shan, W.; Shao, M.; Shen, C. P.; Shen, P. X.; Shen, X. Y.; Sheng, H. Y.; Shi, M.; Song, W. M.; Song, X. Y.; Sosio, S.; Spataro, S.; Sun, G. X.; Sun, J. F.; Sun, S. S.; Sun, X. H.; Sun, Y. J.; Sun, Y. Z.; Sun, Z. J.; Sun, Z. T.; Tang, C. J.; Tang, X.; Tapan, I.; Thorndike, E. H.; Tiemens, M.; Uman, I.; Varner, G. S.; Wang, B.; Wang, B. L.; Wang, D.; Wang, D. Y.; Wang, K.; Wang, L. L.; Wang, L. S.; Wang, M.; Wang, P.; Wang, P. L.; Wang, S. G.; Wang, W.; Wang, W. P.; Wang, X. F.; Wang, Y.; Wang, Y. D.; Wang, Y. F.; Wang, Y. Q.; Wang, Z.; Wang, Z. G.; Wang, Z. H.; Wang, Z. Y.; Wang, Z. Y.; Weber, T.; Wei, D. H.; Wei, J. B.; Weidenkaff, P.; Wen, S. P.; Wiedner, U.; Wolke, M.; Wu, L. H.; Wu, L. J.; Wu, Z.; Xia, L.; Xia, L. G.; Xia, Y.; Xiao, D.; Xiao, H.; Xiao, Z. J.; Xie, Y. G.; Xiu, Q. L.; Xu, G. F.; Xu, J. J.; Xu, L.; Xu, Q. J.; Xu, Q. N.; Xu, X. P.; Yan, L.; Yan, W. B.; Yan, W. C.; Yan, Y. H.; Yang, H. J.; Yang, H. X.; Yang, L.; Yang, Y. X.; Ye, M.; Ye, M. H.; Yin, J. H.; Yu, B. X.; Yu, C. X.; Yu, J. S.; Yuan, C. Z.; Yuan, W. L.; Yuan, Y.; Yuncu, A.; Zafar, A. A.; Zallo, A.; Zeng, Y.; Zeng, Z.; Zhang, B. X.; Zhang, B. Y.; Zhang, C.; Zhang, C. C.; Zhang, D. H.; Zhang, H. H.; Zhang, H. Y.; Zhang, J.; Zhang, J. J.; Zhang, J. L.; Zhang, J. Q.; Zhang, J. W.; Zhang, J. Y.; Zhang, J. Z.; Zhang, K.; Zhang, L.; Zhang, S. Q.; Zhang, X. Y.; Zhang, Y.; Zhang, Y. H.; Zhang, Y. N.; Zhang, Y. T.; Zhang, Yu; Zhang, Z. H.; Zhang, Z. P.; Zhang, Z. Y.; Zhao, G.; Zhao, J. W.; Zhao, J. Y.; Zhao, J. Z.; Zhao, Lei; Zhao, Ling; Zhao, M. G.; Zhao, Q.; Zhao, Q. W.; Zhao, S. J.; Zhao, T. C.; Zhao, Y. B.; Zhao, Z. G.; Zhemchugov, A.; Zheng, B.; Zheng, J. P.; Zheng, W. J.; Zheng, Y. H.; Zhong, B.; Zhou, L.; Zhou, X.; Zhou, X. K.; Zhou, X. R.; Zhou, X. Y.; Zhu, K.; Zhu, K. J.; Zhu, S.; Zhu, S. H.; Zhu, X. L.; Zhu, Y. C.; Zhu, Y. S.; Zhu, Z. A.; Zhuang, J.; Zotti, L.; Zou, B. S.; Zou, J. H.

    2016-01-01

    Using 1.09 x 10(9) J/psi events collected by the BESIII experiment in 2012, we study the J / psi -> gamma eta'pi(+)pi(-) process and observe a significant abrupt change in the slope of the eta'pi(+)pi(-) invariant mass distribution at the proton-antiproton (p (p) over bar) mass threshold. We use two

  19. Un taccuino a forma di strada. Su "Einbahnstrasse" di Walter Benjamin

    Directory of Open Access Journals (Sweden)

    Pier Giovanni Adamo

    2016-05-01

    Full Text Available La poetica di F. Schlegel ha realizzato una storicizzazione della teoria dei generi letterari sostituendo alla dicotomia del classicismo tra forma e contenuto una distinzione tra forma e spirito, secondo cui i materiali linguistico-tematici rappresentano i precipitati di quest’ultimo. Riprendendo questa intuizione di P. Szondi, potremmo affermare che, nella modernità letteraria, l’ibridazione è il processo di transizione dei materiali attraverso le forme. Un’opera tanto esemplare quanto strutturalmente rilevante, nell’orizzonte dell’ibridazione, è Einbahnstraße di Walter Benjamin, dove i materiali più disparati sono combinati a modellare una forma innovativa. Vi si mescolano stilemi della poesia in prosa, narrazione diaristica, (antimetodo surrealista, satira e intuizioni filosofiche. L’unicità, d’altra parte, risiede innanzitutto nell’essenza metacritica del procedimento organizzativo del libro: il frammentismo sistematico è un’applicazione pratica della teoria allegorica del montaggio, descritta nell’Ursprung des deutschen Trauerspiels. Il saggio si propone di leggere il testo come «un taccuino a forma di strada», anche per indagarne il valore di prologo al Passagenwerk, nato dall’avida lettura del Paysan de Paris di Aragon: istituisce un confronto per rilevare, nell’affinità di fondo, la  diversità di approccio tra il pensatore tedesco e il surrealismo, distinguendo tecniche di assemblaggio e ruolo dell’immaginario nell’uso di pubblicità e altri oggetti metropolitani. L’intenzione di una simile analisi di Einbahnstraße è dimostrare che Benjamin combina modelli letterari (Baudelaire, Proust, Kraus su tutti con i nuovi linguaggi artistici e le strategie discorsive della stampa per creare un’«immagine dialettica» dell’esistenza nel XX secolo.Friedrich Schlegel’s poetics realized a historicisation of literary genres theory by replacing classicist dichotomy between form and content with a

  20. Permethrin induction of multiple cytochrome P450 genes in insecticide resistant mosquitoes, Culex quinquefasciatus.

    Science.gov (United States)

    Gong, Youhui; Li, Ting; Zhang, Lee; Gao, Xiwu; Liu, Nannan

    2013-01-01

    The expression of some insect P450 genes can be induced by both exogenous and endogenous compounds and there is evidence to suggest that multiple constitutively overexpressed P450 genes are co-responsible for the development of resistance to permethrin in resistant mosquitoes. This study characterized the permethrin induction profiles of P450 genes known to be constitutively overexpressed in resistant mosquitoes, Culex quinquefasciatus. The gene expression in 7 of the 19 P450 genes CYP325K3v1, CYP4D42v2, CYP9J45, (CYP) CPIJ000926, CYP325G4, CYP4C38, CYP4H40 in the HAmCqG8 strain, increased more than 2-fold after exposure to permethrin at an LC50 concentration (10 ppm) compared to their acetone treated counterpart; no significant differences in the expression of these P450 genes in susceptible S-Lab mosquitoes were observed after permethrin treatment. Eleven of the fourteen P450 genes overexpressed in the MAmCqG6 strain, CYP9M10, CYP6Z12, CYP9J33, CYP9J43, CYP9J34, CYP306A1, CYP6Z15, CYP9J45, CYPPAL1, CYP4C52v1, CYP9J39, were also induced more than doubled after exposure to an LC50 (0.7 ppm) dose of permethrin. No significant induction in P450 gene expression was observed in the susceptible S-Lab mosquitoes after permethrin treatment except for CYP6Z15 and CYP9J39, suggesting that permethrin induction of these two P450 genes are common to both susceptible and resistant mosquitoes while the induction of the others are specific to insecticide resistant mosquitoes. These results demonstrate that multiple P450 genes are co-up-regulated in insecticide resistant mosquitoes through both constitutive overexpression and induction mechanisms, providing additional support for their involvement in the detoxification of insecticides and the development of insecticide resistance.

  1. Cathalitic burners for residential gas appliances; Bruciatori catalitici di gas naturale per apparecchi domestici

    Energy Technology Data Exchange (ETDEWEB)

    Accornero, R.; Canci, F. [Italgas Spa, Rome (Italy)

    2000-12-01

    The growing interest for the rational use of natural gas as a primary source of energy and for the reduction of pollutant emissions from combustion processes has kindled, in recent years, a widespread interest in studies and experimental investigations on the use of premix burners (either ceramic or metallic) for heat generators in domestic applications. The present paper deals with the R and D activities developed in this field by Italgas, Politecnico di Torino (Dipartimento di Scienza dei Materiali ed Ingegneria Chimica) and Merloni TermoSanitari, (an Italian gas boiler manufacturer). The technology hereby presented aims at reducing the pollutants emissions (CO, NO{sub x}, HC) in a wide range of working regimes of the burner, typical of residential heat appliances. The positive results in a lab scale experimental pilot plant have been in some cases confirmed in experimental runs performed on boiler prototypes suitable for large scale industrial production. Some projects, financially supported by the European Community and involving, beyond the above mentioned partners, also other gas distribution companies, universities, research institutes and burner manufacturers, are currently in progress to further analyse the performance of these burners. [Italian] Il crescente interesse per l'uso razionale del gas naturale quale fonte energetica primaria e quale combustibile a basso impatto ambientale, ha suscitato, nei tempi piu' recenti, un vasto interesse per gli studi e per le ricerche nel settore dei bruciatori di gas di tipo a premiscelazione, siano essi in materiale ceramico che metallico, allo scopo di rendere praticabile la loro applicazione nei generatori di calore di tipo domestico. L'articolo descrive l'attivita' di R e S sviluppata da Italgas, Politecnico di Torino - Dipartimento di Scienza dei Materiali ed Ingegneria Chimica - e da Merloni TermoSanitari. La tecnologia sperimentata e' finalizzata alla riduzione delle emissioni di

  2. La Llegenda del llibreter assassí de Barcelona. Tradizione e traduzione. Note al margine dell’edizione italiana

    Directory of Open Access Journals (Sweden)

    Inés Ravasini

    2013-12-01

    Full Text Available La recente pubblicazione in Italia della traduzione de La llegenda del llibreter assassí di Ramon Miquel i Planas offre lo spunto per un confronto con alcune precedenti traduzioni in castigliano e per una breve riflessione di metodo sulla traduzione. Le due versioni spagnole (1991 e 2011 si configurano infatti, a differenza di quella italiana, come libere rielaborazioni dell’originale dal momento che ne alterano la struttura, trasformando il testo e piegandolo a nuove finalità. L’elemento di interesse di questa «manipolazione» risiede nel fatto che essa è in qualche modo autorizzata dalla stessa natura miscellanea dell’opera di Miquel i Planas, al contempo libro erudito e antologia di materiali narrativi diversi, e dalle variegate forme di trasmissione dei materiali leggendari raccolti dallo studioso catalano. Le versioni della Llegenda consentono così d’iscrivere la riflessione sul tradurre nell’ambito della ricezione e dell’influsso esercitato dalla tradizione di un testo sulle sue modalità di traduzione. The recent publication of the Italian translation of La llegenda del llibreter assassí by Ramon Miquel i Planas provides an opportunity to make a comparison with some previous Spanish translations and to reflect briefly on translation methods. The two Spanish versions (1991 and 2011, unlike the Italian one, are free reworkings of the original, in the sense that they alter the structure, transform the text and shape it to new ends. What is interesting about this «manipulation» is that it is in some way legitimised by the heterogeneous nature of Miquel i Planas’s work, which is both an erudite volume and an anthology of different narrative materials, as well as by the varied ways in which the Catalan scholar handles materials relating to legends. The versions of Llegenda thus permit the inclusion of this reflection on translation in the sphere of the reception of a text and of the influence exerted by the tradition

  3. Mussel tissue (T-31) - A new analytical quality control material for the determination of mercury and arsenic in mussels

    Energy Technology Data Exchange (ETDEWEB)

    Gawlik, B. [Joint Research Centre Ispra, Ispra, Varese (Italy). Environment Institute]|[Muenchen, Technische Universitaet (Germany). Lehrstuhl fuer Oekologische Chemie und Umweltanalytik; Druges, M. [Thomson Microelectronics, Crolles (France); Bianchi, M.; Muntau, H. [Joint Research Centre Ispra, Ispra, Varese (Italy). Environment Institute; Bortoli, A. [ULSS 12, Venice (Italy). Presidio Multizonale di Prevenzione; Kettrup, A. [Muenchen, Technische Universitaet (Germany). Lehrstuhl fur Oekologische Chemie und Umweltanalytik]|[GSF Forschungszentrum fuer Umwelt und Gesundheit, Oberschleissheim (Germany). Inst. fuer Oekologische Chemie

    1998-05-01

    The use of filter-feeding molluscs for the monitoring of selected contaminant levels in the marine environment is well-known in the scientific community. In the order to assure the quality of those analysis and to prepare laboratories for accreditation procedures certified reference materials and proficiency testing campaigns were introduced. However, there is still a need for the introduction of suitable analytical quality materials of high quality which can be used on a daily basis. This paper therefore describes the preparation of a mussel tissue material for the internal quality control of Hg and As analysis in bivalves, as well as the principle of preparation and the analytical characterisation of such a material. The total concentration for arsenic (8.98 {+-} 0.67 {mu}g/g) and mercury (0.169 {+-} 0.005 {mu}g/g) was determined by the use of different techniques. Additionally, indicative values for major constituents (C, H, N, Na, Cl, P, S, K, Mg, Ca, Si, Fe, Al, Br, Zn, Sr) and some trace elements (Cu, Cd, Pb, Ni) were measured. [Italiano] L`uso di molluschi filtratori nel monitoraggio dei livelli di contaminazione in ambiente marino e` ben noto in ambito scientifico. Per assicurare la qualita` di queste analisi e preparare i laboratori alle procedure di accreditamento e stato introdotto l`uso di materiali di riferimento certificati accoppiato alla partecipazione a campagne di controllo interlaboratoriale. Attualmente non sono ancora disponibili materiali di riferimento appropriati e di alta qualita`, che possano essere usati su base quotidiana. Questo lavoro descrive la preparazione di un materiale di riferimanto di cozze da usare come mezzo di controllo di qualita` interna e i principi di preparazione e di caratterizzazione analitica di un materiale di questo tipo. La concentrazione totale dell`arsenico (8.98 {+-} 0.67 {mu}g/g) e del mercurio (0.169 {+-} 0.005 {mu}g/g) sono state determinati mediante l`uso di differenti tecniche. Sono stati in oltre misurati

  4. Multiple Cytochrome P450 genes: their constitutive overexpression and permethrin induction in insecticide resistant mosquitoes, Culex quinquefasciatus.

    Science.gov (United States)

    Liu, Nannan; Li, Ting; Reid, William R; Yang, Ting; Zhang, Lee

    2011-01-01

    Four cytochrome P450 cDNAs, CYP6AA7, CYP9J40, CYP9J34, and CYP9M10, were isolated from mosquitoes, Culex quinquefasciatus. The P450 gene expression and induction by permethrin were compared for three different mosquito populations bearing different resistance phenotypes, ranging from susceptible (S-Lab), through intermediate (HAmCq(G0), the field parental population) to highly resistant (HAmCq(G8), the 8(th) generation of permethrin selected offspring of HAmCq(G0)). A strong correlation was found for P450 gene expression with the levels of resistance and following permethrin selection at the larval stage of mosquitoes, with the highest expression levels identified in HAmCq(G8), suggesting the importance of CYP6AA7, CYP9J40, CYP9J34, and CYP9M10 in the permethrin resistance of larva mosquitoes. Only CYP6AA7 showed a significant overexpression in HAmCq(G8) adult mosquitoes. Other P450 genes had similar expression levels among the mosquito populations tested, suggesting different P450 genes may be involved in the response to insecticide pressure in different developmental stages. The expression of CYP6AA7, CYP9J34, and CYP9M10 was further induced by permethrin in resistant mosquitoes. Taken together, these results indicate that multiple P450 genes are up-regulated in insecticide resistant mosquitoes through both constitutive overexpression and induction mechanisms, thus increasing the overall expression levels of P450 genes.

  5. MOOC, OER e l’approccio “flipped classroom”: due case study di transizione in ambito scolastico e aziendale

    Directory of Open Access Journals (Sweden)

    Susanna Sancassani

    2014-08-01

    Full Text Available La portata innovativa dei MOOC non esaurisce la sua rilevanza nell’ambito dei processi di apprendimento che si svolgono in rete. Uno dei principali obiettivi che ha mosso grandi università quali Stanford o MIT ad impegnarsi prima nello sviluppo di OER (Open Educational Resources e poi nei MOOC, è stato quello di trovare modalità che consentissero di migliorare la qualità didattica face-to-face riducendone i costi. In questa prospettiva i materiali didattici online stanno ora consentendo di sperimentare la metodologia delle “flipped classroom” in cui le dinamiche didattiche in aula sono basate su un’elevata interattività con i docenti e tra i pari. Nell’articolo si analizzano due progetti inseriti in differenti contesti, quello scolastico e quello aziendale, basati su un approccio “flipped”. I risultati in termini di efficacia appaiono confortanti, ma ancora più promettenti sono i riflessi sulla sostenibilità dei processi e sui livelli di motivazione di docenti e studenti.

  6. Processes of Interaction between Refractory Materials and Gas Flows in the Duct of an MHD Generator; ИССЛЕДОВАНИЕ ПРОЦЕССОВ ВЗАИМОДЕЙСТВИЯ ЖАРОПРОЧНЫХ МАТЕРИАЛОВ С ГАЗОВЫМ ПОТОКОМ В КАНАЛЕ МГД ГЕНЕРАТОРА

    Energy Technology Data Exchange (ETDEWEB)

    Rekov, A. I.; Romanov, A. I.; Ivanov, A. B. [Nauchno-Issledovatel' skij Institut Vysokih Temperatur, Moskva, SSSR (Russian Federation)

    1966-12-15

    The behaviour of a wide range of materials has been studied in conditions simulating the operating conditions of open- and closed-cycle MHD generators. A number of possible electrode and insulating materials are discussed, in particular the oxides ZrO{sub 2} , MgO, BeO and Al{sub 2}O{sub 3}, the carbides SiC, TiC, ZrC and NbC, the borides ZrB{sub 2} TiB{sub 2} and LaB{sub 6}, and various alloying materials. The possibility of using high-temperature concretes for electrical insulation is considered. (author) [Russian] Issledovano povedenie shirokogo kruga materialov v uslovijah, modelirujushhih uslovija raboty M G D generatorov s otkrytym i zakrytym ciklami. Rassmotren rjad vozmozhnyh jelektrodnyh i izoljacionnyh materialov, v chastnosti, okisly ZrO{sub 2} , MgO, BeO, Al{sub 2}O{sub 3}) , karbidy (SiC, TiC, ZrC, NbC), boridy (ZrB{sub 2} TiB{sub 2}, LaB{sub 6}) i kompozicionnye materialy. Izuchena vozmozhnost' primenenija dlja jelektro- izoljacii zharoupornyh betonov. (author)

  7. Infrastrutture e pianificazione paesaggistica nel rinnovato Codice dei Beni culturali e del Paesaggio

    Directory of Open Access Journals (Sweden)

    Saverio Santangelo

    2012-08-01

    Full Text Available Le infrastrutture agiscono sul paesaggio con effetti sia diretti, e spazialmente limitati, che indiretti, e non precisamente limitati nello spazio e nel tempo. Gli effetti indiretti, in particolare, riguardano anche le infrastrutture che non vediamo, perché nel sottosuolo, o di cui vediamo solo gli elementi puntuali e materiali di reti prevalentemente immateriali. In quest’ultimo caso si tratta dei sistemi di flusso delle informazioni, che oggi e ancor più in prospettiva, insieme ai sistemi per la produzione locale di energia (segnatamente fotovoltaico ed eolico, rafforzano le tendenze all’indifferenza dei fattori localizzativi di attività e residenze. Tutto questo da un lato consente riduzioni dei suoli impegnati e, per alcuni versi, la stessa salvaguardia del paesaggio (possono ridursi le reti fisiche per il trasporto di energia elettrica e gas, ed esempio, ma dall’altro favorisce nuove domande di suolo a fini urbanizzativi e di infrastrutture, non soltanto stradali, per servire ed accedere alle nuove aree interessate dalla domanda, e quindi comporta altri impatti sul paesaggio.

  8. E-books for Italian school, between Law Requirements and Publishers' Choices

    Directory of Open Access Journals (Sweden)

    Maria Vincelli

    2011-11-01

    Full Text Available Il saggio presenta un'analisi del quadro legislativo italiano sulla transizione dei libri di testo dal formato cartaceo a quello digitale, oltre a una panoramica sull'offerta dei maggiori editori a riguardo, prendendo come esempio i libri di testo di Latino per le scuole superiori. Il concetto di libro digitale viene declinato oggi principalmente in due forme: il libro "on-line", digitale (generalmente in PDF o Epub, equivalente ai testi tradizionali a stampa per struttura e tipo di utilizzo; il libro che integra le caratteristiche del libro sia digitale che a stampa con una serie di materiali digitali supplementari. L'opinione dell'autrice è che l'offerta di pubblicazioni scolastiche in formato digitale si attiene a un'interpretazione limitata della legge italiana, e che dunque si prospettano nuove ipotesi che possano unire in modo efficace l'autorevolezza e il valore culturale dei libri di testo con le soluzioni più avanzate del digitale.

  9. Analysis of xanthines in beverages using a fully automated SPE-SPC-DAD hyphenated system

    Energy Technology Data Exchange (ETDEWEB)

    Medvedovici, A. [Bucarest Univ., Bucarest (Romania). Faculty of Chemistry, Dept. of Analytical Chemistry; David, F.; David, V.; Sandra, P. [Research Institute of Chromatography, Kortrijk (Belgium)

    2000-08-01

    Analysis of some xanthines (caffeine, theophylline and theobromine) in beverages has been achieved by a fully automated on-line Solid Phase Extraction - Supercritical Fluid Chromatography - Diode Array Detection (Spe - Sofc - Dad). Three adsorbents have been tested for the Spe procedure: octadecyl modified silicagel (ODS) and two types of styrene-divinylbenzen copolymer based materials, from which Porapack proved to be the most suitable adsorbent. Optimisation and correlation of both Spe and Sofc operational parameters are also discussed. By this technique, caffeine was determined in ice tea and Coca-Cola in a concentration of 0.15 ppm, theobromine - 1.5 ppb, and theophylline - 0.15 ppb. [Italian] Si e' realizzata l'analis di alcune xantine (caffeina, teofillina e teobromina) mediante un sistema, in linea, completamente automatizzato basato su Estrazione in Fase Solida - Cromatografia in Fase Supercritica - Rivelazione con Diode Array (Spe - Sfc - Dad). Per la procedura Spe sono stati valutati tre substrati: silice ottadecilica (ODS) e due tipi di materiali polimerici a base stirene-divinilbenzene, di cui, quello denominato PRP-1, e' risultato essere il piu' efficiente. Sono discusse sia l'ottimizzazione che la correlazione dei parametri operazionali per la Spe e la Sfc. Con questa tecnica sono state determinate, in te' ghiacciato e Coca-Cola, la caffeina, la teobromina e la teofillina alle concentrazini di 0.15, 1.5 e 0.15 ppm.

  10. Evaluation method for material flow and MSW calorific power object of differentiated collection; Metodo per la valutazione dei flussi di materia e del potere calorifico di RSU oggetto di raccolta differenziata

    Energy Technology Data Exchange (ETDEWEB)

    Florio, G. [Rende, Cosenza, Univ. della Calabria (Italy). Dip. di Meccanica; Giordano, R.; Greco, G.

    1998-11-01

    The method developed in the present paper, starting from a knowledge of demographic data, the growth of refuse production and the material composition of solid urban refuse, allows the evaluation of the effects of the aims of differentiated collection, over a period of time, provided for by the norm in force (D.Lgs 22/97). This evaluation is effected both on the quantity of individual materials to be recovered and on the average MSW calorific power to be incinerated. The model was applied to the Region of Calabria and a parametric study was carried out on the average calorific power of the refuse produced by the two different strategies employed to attain the aims provided for by the Ronchi Act (mainly dry and mainly wet differentiated collection). [Italiano] La metodologia sviluppata nel presente lavoro, interamente automatizzata in ambiente Excel, permette, a partire dalla conoscenza di dati demografici, di crescita della produzione di rifiuti e della composizione merceologica del rifiuto solido urbano, di valutare, in un fissato periodo temporale, gli effetti degli obiettivi di raccolta differenziata previsti dalla norma vigente (D.Legs. 22/97) sia sui quantitativi dei singoli materiali da recuperare sia sul potere calorifico medio del RSU da incenerire. Oltre ad una applicazione alla Regione Calabria e` presentato, a titolo esemplificativo, uno studio parametrico sul potere calorifico medio del rifiuto per effetto di due diverse strategie di raggiungimento degli obiettivi previsti dal decreto Ronchi (raccolta differenziata a prevalenza secco e a prevalenza umido).

  11. Confessions of a Heretic Pop. Conversation with Angelo Liberati

    Directory of Open Access Journals (Sweden)

    Roberta Cocco

    2016-07-01

    Full Text Available Conversazione con Angelo Liberati è un intervista rilasciata a chi scrive presso lo studio dell'artista, nel quartiere di Castello a Cagliari. In questo luogo evocativo, che tanto ha in comune con le sue opere per la ricchezza che lo contraddistingue, Liberati si è consegnato ad una chiacchierata a cuore aperto, quasi un flusso di coscienza, la 'confessione' di un 'realista' emerso dalla generazione pop. Una lettura consapevole e sincera della sua vita e delle sue opere, che si è rivelata una testimonianza viva, vibrante e partecipe degli anni della sua infanzia e della sua giovinezza, della scoperta dell’arte e dell’incontro con i suoi maestri, delle sue riflessioni e dei suoi ricordi sul mondo artistico a lui contemporaneo, della sua fascinazione per il mondo del cinema, ma anche di una lucida analisi della sua carriera artistica e di quelle difficoltà materiali e pratiche della vita del pittore nel mondo contemporaneo. Come per le sue opere in cui allestisce tutte le sue memorie, dalle ruminazioni colte ai ricordi personali e quotidiani, anche in questa 'confessione' occorre provare a ristabilire i nessi, ricongiungere passi lontani, che tuttavia si integrano, e catturare, pur nel frammento, qualcosa di profondo e di imprescindibile per leggere e comprendere la ricca produzione dell'artista.

  12. Celano’s Naples: Itineraries through a Material City (1692

    Directory of Open Access Journals (Sweden)

    Joris van Gastel

    2014-10-01

    Full Text Available La Napoli di Carlo Celano (1692: itinerari in una città materialeIl saggio propone una rilettura della nota guida di Napoli pubblicata nel 1692 da Carlo Celano, le Notitie del bello, dell’antico e del curioso della città di Napoli, ma con particolare attenzione per l’interesse continuo ivi dimostrato per la dimensione materiale della città. Soffermandosi sistematicamente sulla qualità della pietra utilizzata in molti edifici napoletani, Celano offre nella sua guida un’illustrazione dettagliata ed esperta della notevole varietà e ricchezza di materiali edili, che nella realtà napoletana del Seicento contraddistingue non solo il panorama urbano ma anche la stessa identità cittadina. La documentazione contenuta nel libro di Celano illustra pertanto un fenomeno caratteristico per l’urbanistica napoletana, e in un momento che precede di poco la sua distruzione, in seguito all’introduzione di stucco come materiale adatto per coprire quasi tutte le superfici, anche quelle in pietre solo recentemente elogiate per la loro propria qualità estetica.

  13. BIM-based Modeling and Data Enrichment of Classical Architectural Buildings

    Directory of Open Access Journals (Sweden)

    Fabrizio Ivan Apollonio

    2012-12-01

    Full Text Available EnIn this paper we presented a BIM-based approach for the documentation of Architectural Heritage. Knowledge of classical architecture is first extracted from the treatises for parametric modeling in object level. Then we established a profile library based on semantic studies to sweep out different objects. Variants grow out from the parametric models by editing or regrouping parameters based on grammars. Multiple data including material, structure and real-life state are enriched with respect to different research motivations. The BIM models are expected to ease the modeling process and provide comprehensive data shared among different platforms for further simulations.ItIn questo articolo è presentata una procedura definita nell'ambito dei sistemi BIM con l'obiettivo di documentare il Patrimonio Architettonico. I dati conoscitivi relativi all'architettura classica sono, in una prima fase, ottenuti dai trattati al fine di modellare in maniera parametrica a livello di oggetti. Successivamente è stata definita una libreria di profili, basata su principi semantici, dalla quale è possibile ottenere oggetti differenti. Dati di natura differente, relativi ad esempio ai materiali, alle strutture, allo stato di fatto, sono implementati in funzione delle differenti esigenze. I modelli BIM hanno la potenzialità di facilitare le procedure di modellazione e di fornire informazioni e dati completi che possono essere condivisi tra piattaforme differenti per ulteriori simulazioni ed analisi.

  14. Critical analyses on the localized corrosion behaviour in materials of energetic interests: Inconcel 600 CSM and Deltacogne

    International Nuclear Information System (INIS)

    Borello, A.; Frangini, S.; Masci, D.

    1989-06-01

    Concerning the two commonly observed phenomena of localized corrosion of Inconel 600 in high temperature caustic environments normally encountered in steam generators of PWR nuclear reactors, the aim of this work is to investigate the intergranular and the stress corrosion cracking behaviour of two heats of Alloy 600, having different origin. In fact one heat was produced by Centro Sviluppo Materiali (CSM) in laboratory scale; the other one was manufactured by Deltacogne following conventional industrial practices. The evaluation of intergranular corrosion susceptibility has been performed by means of the modified Huey test and the Electrochemical Potentiokinetic Reactivation (EPR). The stress corrosion cracking susceptibility was determined by the slow strain rate technique. The results of the present study show that the CSM heat has a better behaviour than the Deltacogne one as for the stress corrosion cracking susceptibility. On the contrary, concerning the intergranular corrosion resistance, both used tests point out that the Deltacogne material has a lower susceptibility to this type of localized corrosion. The sensitization areas in the TTS diagram, depend, even for the same heat, on the type of the test used for the evaluation. (author)

  15. Note di fotonica

    CERN Document Server

    Degiorgio, Vittorio

    2012-01-01

    L’invenzione del laser ha generato una vera rivoluzione nella scienza e nella tecnologia e ha dato luogo alla nascita di una nuova disciplina chiamata Fotonica. Le più importanti applicazioni della Fotonica che hanno un impatto cruciale in molti ambiti della nostra vita sono le comunicazioni in fibra ottica su cui si basa il funzionamento di Internet e del traffico telefonico su grandi distanze, i dischi ottici (CD, DVD, Blue-ray), la sensoristica ottica di tipo industriale e ambientale, la lavorazione dei materiali, l’illuminazione con i LED e la chirurgia. Questo volume ha come obiettivo quello di colmare un vuoto nel panorama italiano di testi universitari riguardanti la Fotonica. Lo scopo principale è quello di esporre in modo sintetico ma rigoroso i concetti che stanno alla base del funzionamento del laser e della propagazione della luce nella materia, e di descrivere i principali componenti e dispositivi ottici e optoelettronici, quali le fibre ottiche, gli amplificatori, i modulatori e i rivelato...

  16. Experience of using Xenical for pilots

    Directory of Open Access Journals (Sweden)

    A S Ametov

    2008-06-01

    Full Text Available Lack of exercise, hypoxia, stress, constant psychological stress, longer shifts, a violation of the feeding process contribute to the development of metabolic disorders. Thus, persons Summer Special can be seen as a model for the study of risk factors for type 2 diabetes and the development of optimal preventive measures that determined the relevance and purpose of the study. The purpose of research - to evaluate the effectiveness of the correction of overweight and disorders of carbohydrate and lipid metabolism in patients with risk factors for type 2 diabetes. For the correction of body weight was used Orlistat (Xenical - specific inhibitor of gastrointestinal lipases, acting locally in the lumen of the gastrointestinal trakta.Materialy and methods The study was performed at the Central Clinical Hospital of Civil Aviation. The study found that those aircrew who are overweight are at high risk of developing type 2 diabetes, which is due on the one hand, metabolic disorders due to abdominal obesity, and on the other - especially the professional activity (physical inactivity, a violation of the process food, emotional stress. As an effective therapy to persons aircrew appropriate to recommend treatment with Xenical against the background of a moderately hypocaloric diet combined with the expansion of physical activity.

  17. Lo Sport e le sue storie: l'esperienza aquilana, quando lo sport supera l'emergenza

    Directory of Open Access Journals (Sweden)

    Marco Pasini

    2013-04-01

    Full Text Available Tale progetto di ricerca, della durata di 12 mesi (da luglio 2010 a luglio 2011 e commissionato dal Ministero del Lavoro e delle Politiche Sociali , intende ricostruire il tessuto sociale di 400 giovani delle scuole secondarie di I e II livello de L’Aquila e provincia attraverso lo sport. Tessuto sociale leso e sfaldato in seguito all’evento sismico che il 6 aprile 2009 colpì il capoluogo abruzzese, in cui oltre all’improvvisa e immediata perdita di tutti i beni materiali sono venuti meno anche i canali di socializzazione primari e secondari. Una quotidianità da ricostruire anche e soprattutto attraverso il concetto di attività sportiva volta, in questo caso più che mai, alla realizzazione di cittadinanza, partecipazione, formazione umana, integrazione e coesione sociale. Con particolare attenzione agli sport di squadra che permettono uno sviluppo affettivo, cognitivo, relazionale e una maggiore comprensione/costruzione della propria personalità. Dunque lo sport come strumento principe per l’inclusione sociale, in quanto gioco che esalta l’armonia e le dinamiche di cooperazione. Lo sport, in generale, va considerato un fatto sociale; è un fenomeno sociale, un sistema culturale - che agisce tra comunicazione, economia e politica - e si presenta come una costruzione sociale. Costruzione generata da significati e rappresentazioni collettive.

  18. Proposta di utilizzo di metodologie termografiche per il controllo di qualità di componenti meccanici

    Directory of Open Access Journals (Sweden)

    Roberto D’Andrea

    2010-04-01

    Full Text Available In base all’esperienza maturata in anni di sperimentazione sull’analisi delle caratteristiche meccaniche dei materiali mediante indagine termografica, nel presente lavoro è proposta una procedura per il controllo di qualità di componenti meccanici in linea di produzione, che è già stata argomento di brevetto. Lo sviluppo di questo lavoro si colloca nell’ambito del progetto FIRB Smart Reflex “Sistemi di produzione intelligenti, flessibili e riconfigurabili”. L’attività svolta dal DIIM riguarda il controllo avanzato dell’affidabilità di componenti meccanici per l’industria automobilistica. Viene proposta, quindi, la realizzazione di una cella di controllo in linea di produzione capace di valutare la presenza di eventuali componenti difettosi attraverso l’analisi termica degli stessi, sollecitati secondo un modello predefinito. L’attività, svolta in questa prima fase in laboratorio, è facilmente trasferibile in linea di produzione, considerando la possibilità di realizzare celle di prova in ambiente controllato, con condizioni praticamente identiche a quelle di laboratorio, eliminando gli effetti di disturbo che possono influenzare la risposta dell’indagine termografica in ambiente non strutturato.

  19. L’incontro di Bruno Munari con la didattica attiva. I fondamenti pedagogici dei laboratori "Giocare con l’arte".

    Directory of Open Access Journals (Sweden)

    Laura Panizza

    2009-07-01

    Full Text Available Il saggio affronta il tema: quali idee pedagogiche hanno influenzato la progettazione dei laboratori "Giocare con l’arte", ideati da Bruni Munari negli anni Settanta e destinati a trasformare profondamente il modo d’intendere la didattica museale e l’educazione estetico-artistica. L’ipotesi dell’autrice è che questi laboratori riprendano alcuni principi dell’attivismo pedagogico, a cui Munari non fa però esplicito riferimento nei suoi scritti. Per questo motivo, il saggio cerca di ricostruire gli incontri più significativi che possono aver mediato l’approccio alla didattica attiva, soffermandosi in particolare sui rapporti di collaborazione intessuti da Munari con lo scrittore Gianni Rodari e con il pedagogista Giovanni Belgrano. Sia Rodari, sia Belgrano erano legati – seppure con diverse modalità – al Movimento di Cooperazione Educativa, che si proponeva di rinnovare la scuola italiana ispirandosi alla pedagogia deweyana. Attraverso la loro mediazione, Munari può essersi avvicinato all’attivismo, di cui condivideva peraltro molteplici assunti: dall’esigenza di promuovere la creatività del bambino, mediante la sperimentazione di materiali e tecniche, alla concezione dell’educatore come animatore delle attività volte alla padronanza dei saperi. In tal senso, il saggio si propone anche di mostrare la continuità esistente tra questa linea teorica e la riflessione sulla democratizzazione dell’arte intrapresa da Munari già nel 1948, con la fondazione – insieme ad altri artisti – del Movimento Arte Concreta.

  20. Una riconsiderazione sul ripostiglio di S'Adde 'e S'Ulumu-Usini

    Directory of Open Access Journals (Sweden)

    Salvatore Merella

    2012-12-01

    Full Text Available In this poster the author presents the results of a study on several pieces of ashlar masonry were recently discovered in a locale called S'Iscia 'e Su Puttu, indicating the likely presence of sacred place belonging to the Nuragic - Bronze and Early Iron Age - phase. It is located very close to the site of S'Adde 'e S'Ulumu, where an important hoard of bronze objects was found, once considered to belong to a single individual for the absence of any clear archaeological context. This hoard acquires a new dimension thanks to the new data presented here: it could have reasonably been part of a set of ritual activities carried out in a sacred area formed of buildings and spaces between them, a common pattern in Sardinian communities during the Early Iron phase. This poster was presented at the Workshop Materiali e contesti dell'Età del Ferro sarda (Materials and contexts in the Sardinian Iron Age, organised by the University of Glasgow and the Comune di San Vero Milis on the 25th of May 2012, and supported for by the Royal Society of Edinburgh, the Comune di San Vero Milis, the University of Glasgow and the Carnegie Trust of the Universities of Scotland.

  1. Rappresentazioni digitali al tratto: tecniche visuali per un utilizzo avanzato del CAD

    Directory of Open Access Journals (Sweden)

    Simone Garagnani

    2006-12-01

    Full Text Available Il vasto panorama esistente di prodotti software destinati al mondo del disegno architettonico, rischia di compromettere quell'individualità che distingue lo stile di rappresentazione del progettista puro. La consuetudine moderna alla rappresentazione tridimensionale fotorealistica a tutti i costi, dove tessiture di materiali e contrasti di luci ed ombre sono a volte talmente esasperati da avere ben poco del fotografico, ha condotto a trascurare le più tradizionali visualizzazioni al tratto, ancora importanti per la loro intrinseca chiarezza esplicativa e visuale delle forme. Non sono pochi infatti i software di nuova produzione che implementano con discutibile disinvoltura motori di rendering più o meno realistici, ma che non sono in grado di presentare disegni prospettici od assonometrici formalmente corretti e gradevoli. Il tracciamento assistito tuttavia può essere un valido strumento di sviluppo anche per tecniche visuali più classiche; in questo breve scritto verranno analizzati due metodi per ottenere questo tipo di elaborati con un pacchetto di disegno digitale standard come AutoCAD.

  2. Le Terme a sud del Pretorio di Gortina. Produzione e circolazione dei contenitori da trasporto

    Directory of Open Access Journals (Sweden)

    Ilaria De Aloe

    2010-03-01

    Full Text Available La posizione centrale nell’Egeo ed i pochi giorni di navigazione dall’Africa e dall’Egitto, come dalla Siria e Palestina, hanno reso la città di Gortina, e Creta stessa, un punto nevralgico all’interno delle rotte commerciali di collegamento e distribuzione di beni tra le sponde del Mediterraneo. Lo studio delle anfore rinvenute nelle campagne di scavo 2003-2006 presso le Terme a sud del Pretorio, ed il necessario confronto con le grandi quantità di materiali provenienti soprattutto dai contesti del Pretorio confermano questa intricata rete commerciale. Già tra Ellenismo e prima età imperiale romana, Gortina svolse una funzione di mercato di raccolta e probabilmente di smistamento delle merci provenienti dall’Occidente e dall’Egeo, assumendo poi nella piena età imperiale, un ruolo sempre più attivo nella produzione delle stesse. La mutata situazione socio-economica dell’età tardo romana - bizantina, nonché la fondazione di una nuova capitale, Costantinopoli, portò Creta e Gortina ad avere scambi commerciali e collegamenti intensi soprattutto con le aree orientali del Mediterraneo privilegiando l’importazione di prodotti dall’esterno.

  3. La materia dei sogni Sbirciatina su un mondo di cose soffici (lettore compreso)

    CERN Document Server

    Piazza, Roberto

    2010-01-01

    Dall’aria che respiriamo ai cibi di cui ci nutriamo, dai vestiti che indossiamo ai detersivi con cui li laviamo, dai colori con cui dipingiamo agli schermi su cui li guardiamo, la nostra realtà quotidiana brulica di cose troppo piccole per essere viste, ma pur sempre enormi rispetto ai mattoni di cui è fatto il mondo, gli atomi e le molecole. Oltre ad essere alla radice di molte tecnologie di oggi e di domani, questi piccoli personaggi, ingredienti primari di quelli che gli scienziati chiamano "materiali soffici", "sistemi sovramolecolari", o " fluidi complessi", ci permettono anche di esplorare i segreti con cui la materia si organizza spontaneamente, perché anche la Vita altro non è se non l’apoteosi di questa incredibile "Terra di Mezzo", a metà strada tra le molecole e l’Uomo. Sfruttando l’esperienza scientifica accumulata dall’autore nel corso di molti anni, questo libro si propone di guidare il lettore attraverso un lungo, ma non troppo faticoso viaggio nel mondo delle nanoparticelle, dei...

  4. Geochemical investigation of Sasa tailings dam material and its influence on the Lake Kalimanci surficial sediments (Republic of Macedonia – preliminary study

    Directory of Open Access Journals (Sweden)

    Petra Vrhovnik

    2011-12-01

    Full Text Available This research is aimed at investigating the mineralogical characteristics of the tailings material and heavy metal contents of the tailings material deposited close to the Sasa Pb-Zn Mine in the Osogovo Mountains (eastern Macedonia and on its possible impact on Lake Kalimanci. The mineral composition of Sasa Mine tailings materialis dominated by quartz, pyrite, galena, sphalerite, magnetite and others. Geochemical analysis was performed in a certified commercial laboratory for the following elements: Mo, Cu, Pb, Zn, Ni, As, Cd, Sb, Bi, Ag, Al, Fe, Mn, S.Analysis revealed very high concentrations of toxic metals in the tailing material – with average values [ mg kg-1]:Mo 2.9, Cu 279, Pb 3975, Zn 5320, Ni 30, As 69, Cd 84, Sb 4.2, Bi 9.4 and Ag 4.1. The multi-element contamination of Sasa Mine tailings material was assigned a pollution index greater of 15, indicating that the tailings material from Sasa Mine contains very high amounts of toxic metals and represents a high environmental risk for surrounding ecosystems. For this reason the influence of discharged tailings dam material into Lake Kalimanci which liesapproximately 12 km lower than Sasa Mine, was also established. Calculated pollution index values for Lake Kalimancisediments vary from 21 to 65 and for Sasa mine surficial tailings dam material from 15 to 60.

  5. Resilience and motivation: a training course for primary teachers

    Directory of Open Access Journals (Sweden)

    Sabrina Schiavone

    2016-07-01

    Full Text Available The research starts from a reflection on educational resilience as a prerequisite for the development of inclusive competences for teachers. 42 teachers and 226 students were involved from three primary schools in the province of Trapani and Palermo, situated in contexts at risk of cultural degradation, early school dropout and high multiculturalism. Research enabled teachers to know and deal with the sense of resilience, not yet widely known, in view of the educational/developmental context, providing them with tools and materials to be used in the classroom, in order to carry out activities, promote resilience and support processes of inclusion by providing causes for reflection on their professional motivation.Resilienza e motivazione: un percorso per la formazione dei docenti di scuola primariaLa ricerca nasce dalla riflessione sull’aspetto educativo della resilienza come presupposto per lo sviluppo di competenze inclusive per i docenti. Sono stati coinvolti 42 docenti e 226 studenti di tre scuole primarie della provincia di Trapani e Palermo, situate in contesti a rischio di degrado culturale, dispersione scolastica ed alta multiculturalità. Il percorso di ricerca ha permesso agli insegnanti di conoscere e di affrontare il costrutto di resilienza, non ancora ampiamente conosciuto, in un’ottica di tipo educativo/evolutivo fornendo loro strumenti e materiali da applicare in classe per la realizzazione di attività per promuovere la resilienza e favorire processi di inclusione ed offrendo spunti di riflessione sulla loro motivazione alla professione.

  6. REKONSTRUKSI PENDIDIKAN PESANTREN SEBAGAI CHARACTER BUILDING MENGHADAPI TANTANGAN KEHIDUPAN MODERN

    Directory of Open Access Journals (Sweden)

    Mohammad Muchlis Solichin

    2012-07-01

    Full Text Available Abstrak: Sebagai lembaga pendidikan tertua dan asli (indegenous Indonesia, pesantren menampilkan suatu sistem pendidikan tradisional dengan mempertahankan tradisi dan tetap berlandaskan pada nilai-nilai dan ajaran Islam. Dalam perkembangannya, banyak pesantren yang menyelenggarakan pendidikan madrasah dan sekolah sebagai respon pesantren terhadap perkembagan dan perubahan yang terjadi di masyarakat. Dengan dikenalnya pendidikan sekolah dan madrasah, maka pesantren sebagai lembaga character building menghadapi berbagai tantangan kehidupan modern yang cenderung materialis, oportunis, dan hedonis. Untuk itu, pesantren harus mampu merumuskan pendidikan yang berorientasi pada penamanaman nilai-nilai keislaman yang berdasarkan pada fithrah (potensi dasar peserta didik.   Abstract: As the oldest and indegenous educational institution of Indonesian, pesantren featuring a traditional education system, maintains the tradition while still being based on the values ​​and teachings of Islam. In its development, many pesantrens adopt madrasah and school as education systems to respond the development and changes in society. Through the adoption of school and madrasah, pesantren as character building institution has to face modernity which tends to be materialistic, oppurtunistic, hedonic. For this reason, pesantren should be able to formulate its education by implementing Islamic values ​​ based on the human nature (basic potential.   Kata Kunci: Pendidikan, pesantren, character building, modern

  7. Prospettive sonore nell’analisi sensoriale-acustica e nella progettazione del cibo - Sound perspectives in the sensory-acoustic analysis and design of food

    Directory of Open Access Journals (Sweden)

    Doriana Dal Palù

    2015-09-01

    Full Text Available L’articolo affronta il complesso tema della progettazione del suono del cibo, ponendo l’aspetto al centro del processo progettuale e considerandolo come un reale requisito di progetto. Sono messe in luce le potenzialità del progettare il suono, ma anche le difficoltà attuali da tenere in considerazione. Si propone l’applicazione di SounBe, una metodologia ed uno strumento brevettati che traggono origine dal mondo della psicoacustica e dell’analisi sensoriale, permettendo di confrontare attraverso una procedura standardizzata suoni di campioni di materiali o di cibi. È riportata una prima applicazione sperimentale e sono discusse le prospettive future nel mondo del cibo. ------ This paper deals with the complex theme of food sound design, focusing this issue at the core of the design process and considering it as a real project requirement. Some opportunities of sound design will be proposed, as well as some criticalities to be always considered. It will propose the application of SounBe, a patented method and tool developed drawing information from psychoacoustics and sensory analysis fields, that allows to compare by a standardized procedure the sounds produced by material samples or foodstuffs. A first experimental application of the method will be presented and, in conclusion, several future perspectives in the world of food will be discussed.

  8. Reconstructing the history of science education through its materiality

    Directory of Open Access Journals (Sweden)

    Francesca Davida Pizzigoni

    2016-04-01

    Full Text Available “Things of Science” is a project promoted in 2014 by the Polytechnic of Turin in partnership with several other scientific territorial institutions that intended to survey and study the educational scientific historical heritage of schools in Turin. It aims to derive from material traces some testimonies of teaching science in different historical periods. Through the project, over 47.000 historical teaching aids have been made available representing a significant basis for numerous studies and insights as well as a safeguard action towards this important source for scientific research in terms of the materiality of the school and in particular of science in school. Ricostruire la storia della didattica scientifica attraverso la sua materialità“Cose di Scienza” è un progetto promosso nel 2014 dal Politecnico di Torino in partenariato con diverse altre realtà scientifiche territoriali che ha inteso censire e studiare il patrimonio didattico scientifico storico presente nelle scuole torinesi, al fine di ricavare dalle tracce materiali alcune testimonianze di didattica della scienza nei diversi periodi storici. Attraverso il progetto sono stati reperiti oltre 47.000 supporti didattici storici che costituiscono da un lato una significativa base per numerosi studi e approfondimenti, e dall’altro una azione di salvaguardia verso questa importante fonte per la ricerca scientifica costituita dalla materialità della scuola e in particolare della scienza a scuola.

  9. Online Pornography. The panopticon and its pleasures

    Directory of Open Access Journals (Sweden)

    Walter Stefano Baroni

    2015-05-01

    Full Text Available L’articolo affronta la questione della pornografia online, concentrandosi su alcuni dei suoi grandi hub presenti sulla rete, come xnxx.com, youporn.com e worldsex.com, cercando di ottenere una comprensione più ampia dell’esperienza che offrono ai loro fruitori.  A partire da una prospettiva foucaultiana e dalle nozioni di panopticon e disciplina, il saggio cerca di proporre una descrizione thick dell’hardcore digitale. Seguendo le indicazioni di Geertz, per cui i testi culturali possono essere intesi solo a partire da un’attenta lettura del contesto semiotico in cui sono inseriti, i materiali pornografici online sono analizzati non solo nelle loro dimensioni testuali, ma anche in quelle paratestuali. In questo modo, gli hub del porno cambiano aspetto. Non più semplici canali di distribuzione di sesso da guardare, ma spettacoli disciplinari, nei quali i corpi sono sottoposti a una disciplina anarchica di estrazione del piacere. Le pratiche disciplinari in questione si svolgono in un mondo privo di uno spazio e di un tempo preciso, dando così forma alla rappresentazione di una società utopica, il cui centro è il corpo della vittima come superficie infinitamente lacerabile.

  10. Porting of a serial molecular dynamics code on MIMD platforms

    Energy Technology Data Exchange (ETDEWEB)

    Celino, M. [ENEA Centro Ricerche Casaccia, S. Maria di Galeria, RM (Italy). HPCN Project

    1999-07-01

    A molecular dynamics (MD) code, utilized for the study of atomistic models of metallic systems has been parallelized for MIMD (multiple instructions multiple data) parallel platforms by means of the parallel virtual machine (PVM) message passing library. Since the parallelization implies modifications of the sequential algorithms, these are described from the point of view of the statistical mechanical theory. Furthermore, techniques and parallelization strategies utilized and the MD parallel code are described in detail. Benchmarks on several MIMD platforms (IBM SP1, SP2, Cray T3D, cluster of workstations) allow performances evaluation of the code versus the different characteristics of the parallel platforms. [Italian] Un codice seriale di dinamica molecolare (MD) utilizzato per lo studio di modelli atomici di materiali metallici e' stato parallelizzato per piattaforme parallele MIMD (multiple instructions multiple data) utilizzando librerie del parallel virtual machine (PVM). Poiche' l'operazione di parallelizzazione ha implicato la modifica degli algoritmi seriali del codice, questi vengono descritti ripercorrendo i concetti fondamentali della meccanica statistica. Inoltre sono presentate le tecniche e le strategie di parallelizzazione utilizzate descrivendo in dettaglio il codice parallelo di MD: Risultati di benchmark su diverse piattaforme MIMD (IBM SP1, SP2, Cray T3D, cluster of workstations) permettono di analizzare le performances del codice in funzione delle differenti caratteristiche delle piattaforme parallele.

  11. Anti-Ro and anti-La autoantibodies induce TNF-α production by human salivary gland cells: an in vitro study

    Directory of Open Access Journals (Sweden)

    V. Mitolo

    2011-09-01

    Full Text Available Obiettivo: Lo scopo di questo studio è stato valutare la produzione di TNF-α, induttore della via estrinseca del processo apoptotico, in seguito al trattamento con gli autoanticorpi anti-Ro ed anti-La isolati da pazienti con sindrome di Sjögren primaria in un modello sperimentale rappresentato dalla linea cellulare di ghiandole salivari umane, A- 253. È stata, inoltre, valutata la presenza sulla superficie di tali cellule di recettori specifici per tale induttore, TNFR1 e TNFR2. Materiali e metodi: Gli autoanticorpi anti-La ed anti-Ro sono stati purificati su una colonna cromatografia ad alta affinità. Le metodiche utilizzate per la valutazione della produzione di TNF-α e lo studio dei recettori di superficie sono state immunofluorescenza, RT-PCR e saggi immunoenzimatici. Risultati: I nostri risultati hanno dimostrato che le cellule A-253 esprimono in superficie i recettori TNFR1 e TNFR2 e che gli autoanticorpi anti-Ro e anti-La sono in grado di indurre la produzione di TNF-α nelle stesse cellule. Conclusioni: Il trattamento con gli autoanticorpi anti-Ro ed anti-La induce la produzione di TNF-α in cellule di ghiandole salivari umane e questo potrebbe spiegare la attivazione della via estrinseca della apoptosi.

  12. Annual cycle energy system (ACES). Performance report, November 1977-September 1978

    Energy Technology Data Exchange (ETDEWEB)

    Holman, A.S.; Abbatiello, L.A.

    1980-05-01

    A single-family residence near Knoxville, Tennessee, is being used to demonstrate the energy-conserving features of the annual cycle energy system (ACES), an integrated heating and cooling system that utilizes a unidirectional heat pump and low-temperature thermal storage. A second house, the control house, is being used to compare the performance of the ACES with that of an electric-resistance heating and hot-water system combined with a central air conditioning system. The results of one year's operation, from November 1977 through mid-September 1978, showed that the ACES consumed 9012 kWhr of electricity and delivered 40.8 x 10/sup 6/ Btu (43.03 x 10/sup 9/J) of heating, 19.8 x 10/sup 6/ Btu (20.89 x 10/sup 9/J) of hot water, and 24.8 x 10/sup 6/ Btu (26.17 x 10/sup 9/J) of cooling; the annual coefficient of performance (COP) was 2.78. The control house consumed 20,523 kWhr of electricity and delivered 41.3 x 10/sup 6/ Btu (43.57 x 10/sup 9/J) of heating, 14.8 x 10/sup 6/ Btu (15.61 x 10/sup 9/J) of hot water, and 23.2 x 10/sup 6/ Btu (24.41 x 10/sup 9/J) of cooling; the annual COP was 1.13. These loads were delivered in a test year in which the heating season was one of the most severe in the past 20 years and the cooling season was normal. In addition, the ACES reduced peak utility system demands significantly: a reduction from 11.7 to 3.1 kW was achieved in the winter and from 4.1 to 0.7 kW in the summer. The only problems encountered were a heat leak into the storage bin that was twice the calculated value and control logic errors that produced excessive hot water in the winter, requiring extensive use of the night heat-rejection mode in the summer. These problems are currently being corrected.

  13. The Development of Materials for Application to Control Rod Systems in Graphite moderated Reactors; Mise au Point de Materiaux pour les Dispositifs de Controle a Barres, Utilbes dans les Reacteurs Ralentis au Graphite; Razrabotka materialov , primenyaemykh v sistemakh upravlyayushchikh sterzhnej v reaktorakh s grafitovym zamedlitelem; Perfeccionamiento de Materiales Aplicables a las Barras de Control en los Reactores Moderados por Grafito

    Energy Technology Data Exchange (ETDEWEB)

    Wade, G. E.; Kempf, F. J. [Hanford Atomic Products Operation, General Electric Company, Richland, WA (United States)

    1964-06-15

    utilizando cualquiera de los materiales mencionados. Los canales de las barras requieren a menudo un revestimiento para proteger el moderador de grafito que los circunda contra los impactos y el efecto de desgaste debidos a la insercion de las barras y para asegurar que el canal conserve la alineacion correcta. Tales revestimientos deben consistir en materiales capaces de soportar la abrasion y el impacto, dotados de gran resistencia mecanica, de reducida seccion eficaz y aptos para trabajar sin refrigeracion. Se ha ensayado con ese fin el grafito pirolitico puro y en forma de mezclas, el oxido de aluminio y el carburo de silicio. Los datos obtenidos acerca de los danos fisicos y de irradiacion indican que algunos de estos materiales se prestan para el revestimiento de los canales de las barras en los reactores. (author) [Russian] Materialy, primenjaemye v sistemah upravljajushhih i avarijnyh sterzhnej reaktorov s grafitovym zamedlitelem i teplonositelem v trubkah, mogut byt' podrazdeleny na dve kategorii: materialy dlja izgotovlenija upravljajushhih sterzhnej i materialy dlja izgotovlenija rubashek rabochih kanalov sterzhnej. Materialy dlja izgotovlenija upravljajushhih sterzhnej, naprimer bor ili gadolinij, mogut sostavljat' edinoe celoe s obolochkoj sterzhnja, kak pri ispol'zovanii boristoj nerzhavejushhej stali, primenjaemoj dlja izgotovlenija avarijnyh sterzhnej. Drugoj metod sostoit v zakljuchenii spechennogo bloka, soderzhashhego bor, naprimer B{sub 4}C -grafit ili B{sub 4}C -aljuminij, v metallicheskuju obolochku. Sterzhni poslednego tipa podhodjat dlja celej regulirovanija vvidu povyshennogo procenta soderzhanija bora. Ispytanija i opyt izgotovlenija pokazyvajut, chto pri ispol'zovanii jetih materialov mozhno skonstruirovat' razlichnye tipy udovletvoritel'nyh sterzhnej;. V kanalah sterzhnej v reaktore chasto trebujutsja rubashki dlja zashhity okruzhajushhego grafitovogo zamedlitelja ot vozdejstvija nagruzok pri vvedenii sterzhnja i iznosa i dlja podderzhanija

  14. EPR ohmic heating energy storage

    International Nuclear Information System (INIS)

    Heck, F.M.; Stillwagon, R.E.; King, E.I.

    1977-01-01

    The Ohmic Heating (OH) Systems for all the Experimental Power Reactor (EPR) designs to date have all used temporary energy storage to assist in providing the OH current charge required to build up the plasma current. The energies involved (0.8 x 10 9 J to 1.9 x 10 9 J) are so large as to make capacitor storage impractical. Two alternative approaches are homopolar dc generators and ac generators. Either of these can be designed for pulse duty and can be made to function in a manner similar to a capacitor in the OH circuit and are therefore potential temporary energy storage devices for OH systems for large tokamaks. This study compared total OH system costs using homopolar and ac generators to determine their relative merits. The total system costs were not significantly different for either type of machine. The added flexibility and the lower maintenance of the ac machine system make it the more attractive approach

  15. Gallium Nitride Direct Energy Conversion Betavoltaic Modeling and Optimization

    Science.gov (United States)

    2017-03-01

    power source. Autonomous systems such as space satellites require power sources that have strict size , weight, and power (SWaP) limitations, which...conversion process, called beta- photovoltaics , has a system efficiency that is dependent on both the conversion efficiency of the phosphor and the...effectively providing 9 J per day for autonomous systems . However, the volume for beta- photovoltaics is larger due to the need for phosphors to

  16. Analytical scheme calculations of angular momentum coupling and recoupling coefficients

    Science.gov (United States)

    Deveikis, A.; Kuznecovas, A.

    2007-03-01

    We investigate the Scheme programming language opportunities to analytically calculate the Clebsch-Gordan coefficients, Wigner 6j and 9j symbols, and general recoupling coefficients that are used in the quantum theory of angular momentum. The considered coefficients are calculated by a direct evaluation of the sum formulas. The calculation results for large values of quantum angular momenta were compared with analogous calculations with FORTRAN and Java programming languages.

  17. Analytical scheme calculations of angular momentum coupling and recoupling coefficients

    International Nuclear Information System (INIS)

    Deveikis, A.; Kuznecovas, A.

    2007-01-01

    We investigate the Scheme programming language opportunities to analytically calculate the Clebsch-Gordan coefficients, Wigner 6j and 9j symbols, and general recoupling coefficients that are used in the quantum theory of angular momentum. The considered coefficients are calculated by a direct evaluation of the sum formulas. The calculation results for large values of quantum angular momenta were compared with analogous calculations with FORTRAN and Java programming languages

  18. Untitled

    Indian Academy of Sciences (India)

    Proc. Nat. Acad. Sci., U.S.A., 1929, 15, 896. 5. D. N. Read & sº ... Phys. Rev., 1934, 46, 571. 6. D. Coster and F. Brons ... Physica, 1934, 1, 155; Nature, 1934, 133, 140. 7. W. W. Watson ... ... Phys. Rev., 1932, 42, 509. -. 8. R. de L. Kronig .. . . Zs. f. Physik, 1928, 50, 347. 9. J. Kaplan * * ... Phys. Rev., 1930, 36, 788. 10. L. Gerő .

  19. Effect of ionizing and nonionizing radiations on the mechanical properties of cellulose tri acetate polymer

    Energy Technology Data Exchange (ETDEWEB)

    Sallam, M M; El-Fiki, S A; Nooh, S A [Physics Department, Faculty of Science, Ain Chams Univ, Cairo (Egypt); Eissa, H M [National Institute for Standard, Cairo (Egypt)

    1997-12-31

    Several quantities including modulus of elasticity, fracture stress, fracture strain, yield tress and yield strain, were calculated for cellulose tri acetate polymer. These samples were exposed to different gamma doses in the range from (32 kg y), and different energies of infrared pulsated laser of 5 watt power in the range (Zero to 9 j/cm 2). The changes in these parameters were found to be due to changes in degree of crystallinity of polymers.4 figs., 3 tabs.

  20. Coherent Structures and Chaos Control in High-Power Microwave and Charged-Particle Beam Devices

    Science.gov (United States)

    2009-01-31

    3D OMNITRAK [13, 19] simulation is performed for the 6:1 nonrelativistic elliptic beam. Since 3D trajectory simulations are time- consuming , only a 2...conditions on 1>. One can write 2() » I ce^^n.^dq I _ \\ ... .... 1., •><> ce^ir.k)^ i-"\\ce^: kfc 4>Cc,.r\\,z)-\\dk[Mk)e b\\ma)R&m^;k)dal (1.9) /_j £"\\ce^n

  1. Summer Undergraduate Training Program in Breast Cancer Research

    Science.gov (United States)

    2005-05-01

    of bovine papilloma - with steroid receptors, Am. J. Pathol. 148 (1996) 549-558. virus type 1 and human papillomavirus type 16, J. Virol. 65 [9] J.M...test did indeed have a peak at the desired molecular weight, but it wasn’t the most prevalent peak in the sample. Nothing more was done with this...in approximately 30% of all human cancers and thus present themselves as a possible target for anticancer agent development. Mutated ras lacks normal

  2. Management of Bottom Sediments Containing Toxic Substances. Proceedings of the U.S./Japan Experts Meeting (8th) Held at Tokyo, Japan on 8-10 November 1982

    Science.gov (United States)

    1984-07-01

    Erosion Board, Washington, D.C., May 1950. HALL, J.V. and WATTS, G.M.,, Beach Rehabilitation by Fill and Nourishment. TYazactionz o6 the AmeAican...Demonstration Project 9J a statistically significant 1ioaccumulation of PCB. The capping exercise was based upon two premises: (1) that the capped mound would...Health., 18:22-2.9 (1969). (6) Prineas, .𔃻. Tre pathogenesis of dying-back polyneuropathies , II. An ultrastructural study of experimental acrylamide

  3. Verhaltenstherapie bei Enkopresis am Beispiel einer Patientin mit chronischem "Toiletten-Verweigerungssyndrom"

    OpenAIRE

    Hansen, Berit; Lehmkuhl, Ulrike

    2007-01-01

    Enkopresis gehört zu den wenig beforschten psychischen Störungen im Kindes- und Jugendalter. Auch Literatur zur psychotherapeutischen Behandlung der Störung findet man kaum. Das verhaltenstherapeutische Standardbehandlungsvorgehen soll beschrieben und anhand eines ausführlichen Fallbeispiels eines 7,9-jährigen Mädchens mit "Toilettenverweigerungssyndrom" erläutert werden. Schlagwörter Verhaltenstherapie - Kindesalter - Enkopresis- "Toilettenverweigerungssyndrom" Encopresis is one of...

  4. Solid State Research

    Science.gov (United States)

    1975-04-17

    D = n — n is the dispersion , and B = n — n is the birefringence. Differentiation of Eq. (II-l) gives 60j = | tan9j...than the measured value; therefore, the change in bi- refringence must be canceled partially by a change in dispersion . The type I room...chromel-alumel ther- mocouple that was mounted on the substrate surface with kaolin -sodium silicate paste and pro- tected from RF interference by

  5. MARSnet: Mission-aware Autonomous Radar Sensor Network for Future Combat Systems

    Science.gov (United States)

    2009-03-23

    in the set is: = R,lv(TmodN] )RbJb’ (rmodN2) IEN2, ifr = 0,i=j 0, if 0 < \\T\\ < Ni - l,i = j (10) 0, if* 9* J According to Definition 3...Telecommunications Engineering University of Texas at Arlington Beijing University of Posts and Tele. AArlington. TX 76010. USA Beijing 100876, China E-mail

  6. Testing IFE materials on Z

    International Nuclear Information System (INIS)

    Tanaka, Tina J.; Rochau, Greg A.; Peterson, Robert R.; Olson, Craig L.

    2005-01-01

    On a single-pulse basis, the tungsten armor for the chamber walls in a laser inertial fusion energy power plant must withstand X-ray fluences of 0.4-1.2 J/cm 2 with almost no mass loss, and preferably no surface changes. We have exposed preheated tungsten samples to 0.27 and 0.9 J/cm 2 X-ray fluence from the Z accelerator at Sandia National Laboratories to determine the single-shot X-ray damage threshold. Earlier focused ion beam analysis has shown that rolled powdered metal formed tungsten and tungsten alloys, will melt when exposed to 2.3 J/cm 2 on Z, but not at 1.3 J/cm 2 . Three forms of tungsten - single-crystal (SING), chemical-vapor-deposited (CVD), and rolled powdered metal (PWM) - were exposed to fluence levels of 0.9 J/cm 2 without any apparent melting. However, the CVD and PWM sample surfaces were rougher after exposure than the SING sample, which was not roughened. BUCKY (1D) calculations show a threshold of 0.5 J/cm 2 for melting on Z. The present experiments indicate no melting but limited surface changes occur with polycrystalline samples (PWM and CVD) at 0.9 J/cm 2 and no surface changes other than debris for samples at 0.27 J/cm 2

  7. Semiclassical analysis of the Wigner 12j symbol with one small angular momentum

    International Nuclear Information System (INIS)

    Yu Liang

    2011-01-01

    We derive an asymptotic formula for the Wigner 12j symbol, in the limit of one small and 11 large angular momenta. There are two kinds of asymptotic formulas for the 12j symbol with one small angular momentum. We present the first kind of formula in this paper. Our derivation relies on the techniques developed in the semiclassical analysis of the Wigner 9j symbol [L. Yu and R. G. Littlejohn, Phys. Rev. A 83, 052114 (2011)], where we used a gauge-invariant form of the multicomponent WKB wave functions to derive asymptotic formulas for the 9j symbol with small and large angular momenta. When applying the same technique to the 12j symbol in this paper, we find that the spinor is diagonalized in the direction of an intermediate angular momentum. In addition, we find that the geometry of the derived asymptotic formula for the 12j symbol is expressed in terms of the vector diagram for a 9j symbol. This illustrates a general geometric connection between asymptotic limits of the various 3nj symbols. This work contributes an asymptotic formula for the 12j symbol to the quantum theory of angular momentum, and serves as a basis for finding asymptotic formulas for the Wigner 15j symbol with two small angular momenta.

  8. Properties and processing technologies of polymers for medical devices; Proprieta' e tecnologie di lavorazione dei polimeri utilizzati nei dispositivi medici

    Energy Technology Data Exchange (ETDEWEB)

    Salernitano, E. [ENEA, Divisione Nuovi Materiali, Centro Ricerche Casaccia, Rome (Italy)

    2000-07-01

    ortopedia, in chirurgia cardiovascolare ed in odontoiatria. Le prestazioni dei materiali utilizzati in campo medico sono valutate analizzandone le caratteristiche di biofunzionalita' e biocompatibilita'. Tali concetti sono strettamente collegati: la biofunzionalita' si riferice alle proprieta' che un dispositivo deve avere per realizzare una certa funzione dal punto di vista fisico e meccanico, mentre la biocompatibilita' alla capacita' del dispositivo di continuare a svolgere quella determinata funzione, nel o sul corpo, durante tutta la vita utile dell'impianto che puo' anche essere permanente. I numerosi metodi di trasformazione e le differenti tecniche di lavorazione dei materiali polimerici consentono di ottenere dei prodotti che soddisfano diverse proprieta' fisico-chimiche e meccaniche, come la stabilita' chimica e fisica, la biocompatibilita', la possibilita' di subire processi di sterilizzazione, il controllo della permeabilita' a gas e umidita', il controllo dei processi di biodegradazione, la resistenza all'usura ed ai carichi ciclici, la durezza. Gran parte della ricerca sara' mirata al miglioramento dell'affidabilita' e della durata dei biomateriali gia' impiegati attualmente grazie alle loro caratteristiche di biofunzionalita' e biocompatibilita'. Gli sviluppi piu' attesi nel campo dei dispositivi medici sono relativi alla produzione di organi bioartificiali, in cui i biomateriali facciano da supporto per la crescita cellulare tridimensionale, utilizzando le competenze dell'ingegneria tissutale.

  9. Women's voices in English course-books in Italy: a diachronic survey from the 50s to the 80s

    Directory of Open Access Journals (Sweden)

    Paola Vettorel

    2014-03-01

    Full Text Available Normal 0 14 false false false IT X-NONE X-NONE MicrosoftInternetExplorer4 Abstract English language teaching materials usually reflect both the explicit and the implicit attitudes and beliefs of their authors, of the society and the culture of the times they live in. Attitudes and beliefs are bound to change over time and are affected by socio-cultural changes, particularly in areas such as power relationships, the image of women and that of identity construction. The first coursebook analyses in terms of women’s representations and sexist attitudes date back to the 70s and the 80s (e.g. Hartman, Judd 1978; Stern 1976; Porreca 1984; Schmitz 1975, 1984 and have been greatly influenced by language and gender studies (e.g. Sunderland 1992, 1994, 2000; Sunderland, Litosseliti 2002; Cameron 2005. This paper is aimed at presenting the results of a study on how women and their voices have been portrayed in ELT coursebooks addressed to Italian students over time. The analysis carried out in a diachronic perspective, have specifically focussed upon textbooks published between the 1950s and the beginning of the 80s in order to represent different historical perspectives. The proposed stretch in time to the 80s is aimed at investigating the most relevant shifts occurring in ELT coursebooks in the 70s as a consequence of changes in society and the influence of gender studies. The categories used to analyse the ELT materials have been: the representation (as well as the omission of women and their roles in texts and illustrations; the language used to refer to women and its role in maintaining, diminishing or reinforcing sexist values. Despite a correspondence between gender representations and ongoing changes in society, the textbooks examined appear to represent more traditional than innovative views on women. Keywords: ELT course-books, women, attitudes, gender studies, diachronic study Abstract I materiali utilizzati per l’insegnamento dell

  10. Properties and processing technologies of polymers for medical devices; Proprieta' e tecnologie di lavorazione dei polimeri utilizzati nei dispositivi medici

    Energy Technology Data Exchange (ETDEWEB)

    Salernitano, E [ENEA, Divisione Nuovi Materiali, Centro Ricerche Casaccia, Rome (Italy)

    2000-07-01

    chirurgia cardiovascolare ed in odontoiatria. Le prestazioni dei materiali utilizzati in campo medico sono valutate analizzandone le caratteristiche di biofunzionalita' e biocompatibilita'. Tali concetti sono strettamente collegati: la biofunzionalita' si riferice alle proprieta' che un dispositivo deve avere per realizzare una certa funzione dal punto di vista fisico e meccanico, mentre la biocompatibilita' alla capacita' del dispositivo di continuare a svolgere quella determinata funzione, nel o sul corpo, durante tutta la vita utile dell'impianto che puo' anche essere permanente. I numerosi metodi di trasformazione e le differenti tecniche di lavorazione dei materiali polimerici consentono di ottenere dei prodotti che soddisfano diverse proprieta' fisico-chimiche e meccaniche, come la stabilita' chimica e fisica, la biocompatibilita', la possibilita' di subire processi di sterilizzazione, il controllo della permeabilita' a gas e umidita', il controllo dei processi di biodegradazione, la resistenza all'usura ed ai carichi ciclici, la durezza. Gran parte della ricerca sara' mirata al miglioramento dell'affidabilita' e della durata dei biomateriali gia' impiegati attualmente grazie alle loro caratteristiche di biofunzionalita' e biocompatibilita'. Gli sviluppi piu' attesi nel campo dei dispositivi medici sono relativi alla produzione di organi bioartificiali, in cui i biomateriali facciano da supporto per la crescita cellulare tridimensionale, utilizzando le competenze dell'ingegneria tissutale.

  11. Biobanche in bilico tra proprietà privata e beni comuni: brevetti o open data sharing? Biobanks on Balance between Private Property and Commons: Patents or Open Data sharing?

    Directory of Open Access Journals (Sweden)

    Antonella De Robbio

    2010-12-01

    Full Text Available

    La diffusione e la condivisione dei dati contenuti nelle Biobanche è studiato attraverso lo statuto normativo di queste istituzioni, con particolare attenzione al diritto d'autore. Queste istituzioni sono rappresentate da un complesso organizzato di campioni biologici umani con finalità diagnostiche, terapeutiche e di ricerca. Data la relativa novità dell'argomento, il loro statuto è molto controverso e particolarmente complicato è il caso dello sfruttamento di eventuali scoperte.

    La titolarità della proprietà dei materiali (cellule, tessuti o organi e la titolarità della proprietà della biobanca, intesa come entità che si occupa della gestione della banca dati, è infatti fondamentale al fine di determinare eventuali diritti su ricerche brevettabili. In Europa esiste il diritto sui generis, che stabilisce i diritti per il costitutore della banca dati, il quale stanzia un investimento economico al fine di costituire un insieme organizzato di informazioni. Tuttavia, il principale problema di questo tipo di banche dati è legato alla qualità dell'oggetto brevettabile: la materia organica, vivente ed autoreplicante.

    Al riguardo, vi è una netta contrapposizione tra coloro che spingono per la privatizzazione di questi beni biologici, al fine del loro possibile sfruttamento commerciale, e coloro che si rifanno ai modelli di open data sharing, che considerano Commons, "beni comuni", anche questo tipo di materiali organici. La tendenza generale risulta essere la seconda, proteggere il corpo umano e il suo genoma da ogni forma di sfruttamento economico, pur riconoscendo in alcuni casi la possibilità di profitti connessi con la proprietà intellettuale derivante dall'opera dell'ingegno.

    The circulation and sharing of contents in biobanks is approached with the study of the normative statutes of these institutions, with careful attention to copyright. Such institutions are an

  12. STRUMENTI E TECNOLOGIE IN RETE PER L’INSEGNAMENTO E L’APPRENDIMENTO DELLA LINGUA

    Directory of Open Access Journals (Sweden)

    Diego Santalucia

    2011-02-01

    Full Text Available L’articolo analizza il processo di sviluppo delle tecnologie finalizzate alla comunicazione in rete nel web 2.0 e alcune possibilità della loro utilizzazione a fini didattici. La prima parte illustra la situazione attuale del web, con le sue risorse in ambito tecnologico e le sue peculiarità rispetto a una didattica che dovrebbe tener conto, in maniera sempre maggiore, dei nuovi strumenti di comunicazione basati sulla percezione sociale della rete.  Nella sua parte centrale, l’articolo propone alcune possibilità d’uso di strumenti web in situazioni “non ideali” - dal punto di vista della disponibilità oggettiva delle nuove tecnologie in classe - e illustra alcuni esempi di utilizzo degli stessi in situazioni, invece, “ideali”.  Tra gli strumenti oggetto di questo lavoro c’è una piattaforma didattica utilizzata per attività di apprendimento assistito dell’Italiano per Stranieri con riferimenti ai suoi strumenti di amministrazione dei contenuti, con approfondimenti sulla presentazione di attività video, audio e scrittura attraverso software di gestione e presentazione dei materiali. Oltre a fornire un quadro, si spera, concreto e sintetico delle prospettive dell’uso di strumenti in continuo divenire, un altro obiettivo dell’articolo è quello di mostrare la possibilità di uno sviluppo ulteriore della già sostanziale funzione autoriale di un docente di lingua, attraverso la creazione di materiali specifici per un corso con strumenti che possano favorirne il riutilizzo e l’aggiornamento.     Online tools and technologies for teaching and learning languages This article analyzes the development of technologies aimed at online communication in the 2.0 web ambient and a few ways they can be used for teaching. The first part describes the current situation of the Internet, with its technological resources and peculiarities with respect to teaching.  It is more and more important to keep in mind the new communication

  13. Gunshot wounds to the head. Correlations between CT and clinical findings, neurosurgical treatment and long-term sequels; Traumi cranio-encefalici da proiettile: correlazione tra tomografia computerizzata, clinica, trattamento neurochirurgico e sequele a distanza

    Energy Technology Data Exchange (ETDEWEB)

    Salzano, A.; Nocera, V. [Ospedale S. Giovanni di Dio, Frattamaggiore, NA (Italy). Servizio di Radiologia; De Rosa, A.; Nunziata, A. [Ospedale Loreto Mare, Neaples (Italy). Servizio di Radiologia; Rossi, E.; Brunese, L. [Universita' degli Studi Federico II, Neaples (Italy). Ist. di Scienze Radiologiche; Tuccillo, M. [Azienda Ospedaliera di Rilievo Nazionale A. Cardarelli, Neaples (Italy). Servizio di Radiologia; Grassi, R. [Seconda Universita' degli Studi, Neaples (Italy). Ist. di Radiologia

    2000-03-01

    With the aim of demonstrating the usefulness of computerised tomography (CT) findings in the planning of brain neurosurgery in gunshot victims, for prompt and successful treatment, 30 patients with brain gunshot wounds were examined with CT over 5 years. The mortality rate of firearm wounds of the skull base was 34% higher than that of the hemisphere; this is due to carotid hemorrhage and midbrain damage. Such traumas require emergency radiological diagnosis and neurosurgical treatment because of their severity and early irreversible complications. Complex operations and skilled surgeons may prevent disabling postoperative sequels. CT findings are indispensable and must be correctly interpreted. The radiologist and the neurosurgeon must collaborate closely and both must consider several diagnostic factors affecting surgical planning. [Italian] Scopo dello studio e' stato quello di dimostrare l'utilita' della semeiologia della tomografia computerizzata in relazione con la pianificazione dell'intervento neochirurgico, al fine di attuare con tempestivita' interventi chirurgici soddisfacenti e meno lesivi. Lo studio comprende 30 casi di lesioni cranio-encefaliche da arma da fuoco esaminate con tomografia computerizzata nel periodo di 5 anni. Materiali e metodi utilizzati sono analiticamente descritti. L'esperienza dimostra che nelle lesioni da arma da fuoco del basicranio si nota una mortalita' del 34% superiore rispetto a quelle piu' craniali come quelle emisferiche in relazione a emorragie carotidee e lesioni tronco-mesencefaliche. Tali traumi esigono diagnosi radiologica e terapia neurochirurgica d'urgenza per la gravita' e le precoci complicanze irreversibili. Cio' richiede interventi complessi e manualita' esperte e rapide al fine di evitare sequele postoperatorie invalidanti. La corretta e indispensabile interpretazione dei segni radiologici della tomografia computerizzata deve avvenire in stretta

  14. Venezia da città con porto a città-porto: proposta di rigenerazione urbana della Marittima

    Directory of Open Access Journals (Sweden)

    Daniele Cannatella

    2014-06-01

    Full Text Available La città di Venezia, insieme al complesso sistema lagunare di cui fa parte e al quale è strettamente connessa, costituisce un interessante oggetto di studio per quanto riguarda l’equilibrio raggiunto nel tempo fra uomo e acqua, nello specifico, fra processi antropici e dinamiche ambientali. Le tradizionali tecniche costruttive veneziane sono uno degli esempi più evidenti di come l’ingegno umano abbia superato la sfida dell’acqua, riuscendo ad urbanizzare un ambiente inizialmente ostile e a creare le condizioni favorevoli all’abitabilità e ad uno sviluppo economico prevalentemente commerciale. Questo equilibrio era basato sulla profonda conoscenza dei processi naturali che caratterizzavano, e caratterizzano, la laguna e derivava dall’acquisizione di quella sapienza costruttiva generata dalle continue sperimentazioni nella ricerca di fondali idonei, di materiali adeguati e di tecniche rispondenti ad esigenze sempre più complesse, con un’estrema attenzione al territorio e alle sue risorse.Con l’affermarsi dell’era industriale, nel corso del diciannovesimo secolo, Venezia riformula le sue strategie di sviluppo puntando sulla costruzione di una nuova base industriale connessa al porto e sulla promozione turistica dell’isola. Il superamento della capacità di carico è sicuramente uno dei più consistenti punti di rottura di quel delicato equilibrio su cui è stata fondata la città fin dalle sue origini.L’articolo presenta una proposta progettuale di riconfigurazione della Marittima di Venezia basata sulla ridistribuzione dei flussi turistici e sull’incremento di resilienza del sistema economico, sociale ed ambientale della città, puntando sul porto come importante risorsa strategica per il territorio. 

  15. Amebiasi cutanea in iraniano alcolista, immunocompromesso aspetti immunochimici e istopatologici.

    Directory of Open Access Journals (Sweden)

    E. Ventura Spagnolo

    2003-05-01

    Full Text Available

    Obiettivo: nel quadro delle infrequenti manifestazioni extraintestinali dell’amebiasi, le localizzazioni cutanee relative, in corso della mutevole reattività ospite parassita, risultano molto rare. È esposto, pertanto, un caso di amebiasi cutanea, caratterizzato dalla presenza del parassita nelle lesioni dermiche, con i suoi particolari aspetti immuno istologici e clinici, che ne derivano.

    Materiali e metodi: uomo di aa. 30, iraniano, residente in Messina, da più tempo. Nel corso di screening parassitologico presso il Centro Assistenza Immigrati, è risultato portatore (fecale di cisti di E. Histolytica. Durante la permanenza in Iran, lavoro agricolo con maneggio di fertilizzanti fecali; abuso di alcolici da più anni. Epatomegalia; in sede mesogastrica, presenza di una lesione ulcerativa, rotondeggiante (cm 2,5 D con induito rossastro e margini sclerotici e dolenti. Esame istologico da frammento bioptico: infiltrato monocitario con degenerazione degli elementi cutanei, e presenza nell’essudato di trofozoiti di E. Histolytica. Parametri immunoematologici: corrispondenti a paziente alcolista, con immunodeficienza cellulo mediata, e negatività per HIV.

    Risultati: adoperato trattamento con metronidazolo e paramomicina, insieme a terapia correttiva dei disordini alcolcorrelati, nonché dell’immuno deficit mediato. Aggiunto, inoltre, trattamento topico con pasta di RAVAULT’S, medicata con idroemetina, a forti dosi. Guarigione senza recidive, dopo 4 settimane del complessivo trattamento.

    Conclusioni: facilitazione impianto e/o colonizzazione E. Histolytica in sede cutanea, in rapporto ad alterazioni conseguenti ad abuso alcolico e/a immunodeficit cellulo mediato, svolgentisi da più anni, nel caso descritto. Tale lesione cutanea, osservata in soggetto alcolista e immunocompromesso, può rientrare, certamente, nel quadro delle infezioni opportunistiche.

  16. ICT: interfacce tra persone e luoghi

    Directory of Open Access Journals (Sweden)

    Corinna Morandi

    2013-04-01

    Full Text Available Nonostante la diffusione del paradigma della smart city sia stata esponenziale, con l’effetto di confonderne il significato, il concetto di “città intelligente” indica comunque un tema di ricerca importante, in particolare quando venga esteso a contesti territoriali più ampi. In questo senso, la ricerca La smart region tra Torino e Milano. I servizi mobili come driver di innovazione territoriale in vista di Expo 2015 (Politecnico di Milano-Telecom Italia si propone di sperimentare l’uso delle ICT per un sistema integrato di servizi nel territorio tra Torino e Milano, anche in prospettiva di Expo 2015: una regione metropolitana valorizzata da un sistema di relazioni già attive e inserita nel contesto più ampio della city-region del Nord Italia, il cui sviluppo va legato ad una strategia di scala vasta, declinabile nella definizione di “smart city-region” o, più semplicemente, di “smart region”. In tale contesto, il ruolo delle università nei processi di sviluppo territoriale, il miglioramento dei servizi materiali e immateriali erogati dai campus, su cui la ricerca (in corso ha scelto di concentrarsi, può contribuire ad aumentare la sostenibilità e competitività del territorio. Una prima sperimentazione è stata condotta sull’area di Città Studi a Milano, testando una metodologia utile a comprenderne le esigenze e individuando soluzioni e servizi funzionanti su  terminali di comunicazione mobile, interfaccia tra persone e luoghi nel campus e nel contesto urbano circostante.

  17. Museum theriological collections for the study of genetic diversity

    Directory of Open Access Journals (Sweden)

    Ettore Randi

    2008-02-01

    Full Text Available Abstract Molecular methods to analyse DNA variability are opening new perspectives in the role played by museums in biodiversity research. DNA can be extracted from specific tissue collections, as well as from traditional voucher specimens. Ancient and museum DNA research produce valuable information for defining the phylogenetic positions of extinct taxa, the reconstruction of molecular and organismal evolution in extinct species, the characterization of extinct populations, including animal diets or microbial infections. Historical DNA samples are important sources of information also for conservation and evolutionary studies. In this paper, the methods used for ancient DNA analysis and the main results reported in published studies are reviewed. Riassunto Le collezioni teriologiche museali e lo studio della variabilità genetica. I metodi di analisi del DNA aprono nuove prospettive per il ruolo dei musei nello studio della biodiversità. Il DNA può essere estratto da collezioni di tessuti, oppure dai tradizionali materiali museali. Le ricerche che utilizzano DNA antico e museale possono produrre informazioni utili per definire la posizione filogenetica di taxa, la ricostruzione dell’evoluzione molecolare e fenotipica di specie e la caratterizzazione di popolazioni estinte, incluse l’identificazione della dieta e la presenza di malattie infettive. L’analisi del DNA estratto da campioni storici può fornire informazioni importanti anche per ricerche di biologia della conservazione. Si analizzano i metodi utilizzati per l’analisi del DNA antico, corredati da un breve excursus dei risultati delle principali ricerche disponibili in letteratura.

  18. Alfred Kubin: un sognatore a vita

    Directory of Open Access Journals (Sweden)

    Simona Argentieri

    2010-12-01

    Full Text Available Il saggio considera l’opera grafica e narrativa di Alfred Kubin (1877-1959, artista boemo ai margini del movimento espressionista, che con i suoi scritti fantastici e i suoi disegni onirici ha suscitato infiniti spunti di interpretazione psicologica. Secondo l’autrice, la qualità e l’originalità delle creazioni di Kubin non si può però cercare nella decifrazione simbolica dei contenuti, considerandoli a priori spie di materiali psichici profondi sgorgati dall’inconscio. Più interessante semmai tentare di far ordine tra i diversi livelli di intenzionalità e di coscienza che si intrecciano nelle sue creazioni. Freud e Kubin sono contemporanei; vivono entrambi nel cuore della mitteleuropa, parlano la stessa lingua, respirano lo stesso fervido clima culturale, ma si sono reciprocamente ignorati. Le loro differenze sono irriducibili fin dal piano teorico, poiché per Freud il sogno è solo la via -sia pure regia- per scrutare l’inconscio, ma è in sé materia bruta, ipoevoluta. Per Kubin invece è un fenomeno ipervalutato, un principio creativo autonomo e superiore, quasi metafisico. E’ invece profondamente aderente al più moderno spirito psicoanalitico il metodo secondo il quale Kubin dice come vorrebbe essere guardato: “Il vero fruitore, così come io lo desidero, dovrà guardare i miei fogli non solo apprezzandoli e criticandoli, ma come animato da sensazioni segrete, dovrebbe rivolgere la sua attenzione anche alla ricchissima camera oscura della propria coscienza onirica.” Cioè, detto nei nostri più attuali termini psicoanalitici, lo “spazio transizionale” dell’opera è abitato da artista e fruitore, che vi attribuiscono significati potenzialmente infiniti, più o meno condivisi, ma che comunque nell’incontro con l’altro acquistano senso attivando circuiti sinestetici affettivi e cognitivi.

  19. Globalization in the post - colonial world

    Directory of Open Access Journals (Sweden)

    Korobeynikova Larisa A.

    2016-01-01

    Full Text Available The paper presents a new interpretation of globalization within the boundaries of the author’s concept of soft globalization, which exploits a normatively attractive alternative to the concept of the Empire. It is argued here that the conditions of development of contemporary post - colonial world communities do not require any unification in the form of the Empire, but instead the creation of a non repressive mechanism of social regulation - the implementation of a form of soft globalization, a globalization with a mental form are expedient here. Historically, globalization occurred in a strict material(i.e. economical and military form that prompted the conditions for the evolution of civilization as the Empire: a case in which the development of the world occurs under the power of a single dominating state. Imperialistic politics leads to colonial politics formation. The history of the phenomena of civilization shows many instances of Empire globalization. Globalization in the Empire form was already observed at the time of the Roman Empire. At this time processes of development inside the Empire were manifestations of globalization in its highest cultural shape. But ancient Rome was also a social and political experiment that acquired the attributes of a purely material globalization in the end, and historically brought about the irreversible crash of the Roman Empire itself. Contemporary fluctuations referring to the process of globalization can be registered in the US’s attempts of material domination inside this or that existing case of civilization, which causes colonialism appearance. The main idea stressed in the paper is that only a mental globalization could succeed in the end.

  20. CLIL and CALL for a teacher’s expertise: an international training experience

    Directory of Open Access Journals (Sweden)

    Letizia Cinganotto

    2016-07-01

    Full Text Available The paper deals with the link between Content and Language Integrated Learning (CLIL and Computer Assisted Language Learning (CALL, that is the use of ICT to enhance language teaching-learning and the teaching of subject content in a foreign language. Starting from this background, the paper describes an online training initiative promoted by the authors within an international community of peers, made up of teachers, trainers and educators from all over the world, named “Techno-CLIL for EVO 2016”. The initiative was aimed at supporting and guiding participants to discover and experiment digital tools for CLIL lessons, offering the opportunity to share ideas, materials, good practices in an international perspective. Particular attention is devoted to the personal and professional enrichment and growth this training pathway may have helped the 5.000 participants to achieve.CLIL e CALL nell’expertise del docente: un’esperienza di formazione internazionaleIl contributo focalizza l’attenzione sulla correlazione tra Content and Language Integrated Learning (CLIL e Computer Assisted Language Learning (CALL, cioè l’uso delle tecnologie per una maggiore efficacia dell’insegnamento-apprendimento delle lingue o di contenuti disciplinari veicolati in lingua straniera. Partendo da questo background, il contributo descrive una iniziativa di formazione online in lingua inglese promossa dalle autrici all’interno di un contesto internazionale, costituito da una comunità di pratica di docenti, formatori, educatori di tutto il mondo, denominata “Techno-CLIL for EVO 2016”. L’iniziativa mirava a sensibilizzare e guidare i partecipanti nella scoperta e sperimentazione della didattica CLIL in modalità digitale, offrendo l’opportunità di un confronto ed uno scambio di idee, materiali, buone pratiche in una prospettiva internazionale. Particolarmente significative le ricadute che questo percorso ha comportato per i circa 5.000 partecipanti

  1. Advanced welding for closed structure. Pt. 3 The thermal approach

    Energy Technology Data Exchange (ETDEWEB)

    Sacripanti, A.; Bonanno, G.; Paoloni, M.; Sagratella, G. [ENEA Centro Ricerche Casaccia, Rome (Italy). Dipt. Innovazione; Arborino, A.; Varesi, R.; Antonucci, A. [DUNE, (Italy)

    1999-07-01

    This report describes the activities developed for the European Contract BRITE AWCS III to study the use of thermal sensing techniques to obtain an accurate detection of the internal reinforcement of the closed steel structures employed in the shipbuilding industry. After a description of the methods, normally developed in Russia, about the techniques and problems, for the thermal testing of materials in the conventional approach, a new thermal detector was utilized, a new bolometric thermo camera is introduced with a special software for the on line image analysis, there are also shown the experimental tests and results. The obtained conclusion shows that the thermal non destructive testing techniques with the new detector should be useful to assemble a complete sensing system with one ultrasonic head. [Italian] Questo rapporto descrive le attivita' sperimentali sviluppate nell'ambito del contratto europeo BRITE AWCS III, in cui si sono utilizzate tecniche termiche per ottenere un preciso rilevamento dei rinforzi interni di strutture metalliche chiuse utilizzate nell'industria delle costruzioni navali. Dopo la descrizione dei metodi sviluppati essenzialmente in Russia, circa le tecniche e i problemi riguardanti il testing termico dei materiali, e' stato introdotto un approccio innovativo basato su un nuovo sensore: una termocamera bolometrica connessa con un software dedicato per l'analisi online del setto; vengono inoltre mostrati i risultati sperimentali ottenuti. Le conclusioni ottenute mostrano che nel nuovo approccio, il testing termico non distruttivo dovrebbe essere utile per assemblare un sistema sensoriale completo che utilizzi anche un sensore di tipo ultrasonico.

  2. Modeling boron separation from water by activated carbon, impregnated and unimpregnated

    Energy Technology Data Exchange (ETDEWEB)

    Ristic, M.; Grbavcic, Z. [Belgrade Univ., Belgrade (BA). Faculty of Technology and Metallurgy; Marinovic, V. [Belgrade Univ., Belgrade (BA). Ist. of Technical Science of the Serbian Academy of Science and Arts

    2000-10-01

    The sorption of boron from boric acid water solution by impregnated activated carbon has been studied. Barium, calcium, mannitol, tartaric acid and citric acid were used as chemical active materials. All processes were performed in a chromatographic continuous system at 22{sup 0} C. Experimental results show that activated carbon impregnated with mannitol is effective in removing boron from water. The separation of boron from the wastewater from a factory for producing enameled dishes by activated carbon impregnated with mannitol was also performed. Two models have been applied to describe published and new data on boron sorption by impregnated activated carbon. Both of them are based on the analysis of boron concentration response to the step input function. This led to a mathematical model that quite successfully described impregnation effects on adsorption capacities. [Italian] E' stato studiato l'assorbimento del boro, mediante carbone attivo impregnato, da soluzioni acquose di acido borico. Quali materiali chimici attivi sono stati utilizzati: bario, calcio, mannitolo, acido tartarico ed acido citrico. Tutti i processi sono stati condotti in un sistema cromatografico continuo a 22{sup 0}C. I risultati sperimentali mostrano che il carbone attivo impregnato con mannitolo e' efficace nella rimozione del boro dall'acqua. E' anche stata effettuata la separazione del boro da acque di scarico di un'industria per la produzione di piatti smaltati mediante carbone attivo impregnato con mannitolo. Sono stati applicati due modelli per descrivere i risultati, pubblicati e nuovi, dell'assorbimento del boro mediante carbone attivo impregnato. Entrambi sono basati sull'analisi della risposta alla concentrazione di boro successivamente incrementata a stadi. Cio' porta ad un modello matematico che descrive abbastanza soddisfacentemente gli effetti dell'impregnazione sulla capacita' di assorbimento.

  3. Cruetzfieldt Jakob Disease e sindromi correlate Il centro di riferimento Piemontese e la sua sorveglianza epidemiologica

    Directory of Open Access Journals (Sweden)

    G. Catapano

    2003-05-01

    Full Text Available

    Le encefalopatie spongiformi trasmissibili (EST sono malattie del sistema nervoso dell’uomo, ad esito infausto. L’agente eziologico, la proteina prionica (PrP, può trasformarsi e accumularsi nella cellula nervosa causandone la morte. La scoperta negli anni ‘90 di una variante (v. Cruetzfieldt Jakob Disease, correlata all’encefalopatia spongiforme bovina, che colpisce soggetti sotto i 30 anni, ha aumentato l’interesse per le EST.

    I paesi della comunità europea hanno adottano misure di controllo della carne bovina e si sono dotati di osservatori epidemiologici. Pertanto anche in Italia si è avuta l’esigenza di doverne disporre. Si è deciso quindi di istituire anche in Piemonte un centro per la sorveglianza e la notifica delle EST tramite sorveglianza epidemiologica e diagnosi, per mezzo di indagini molecolari e neuropatologiche con la successiva costituzione di una banca dati condivisa con altri centri di riferimento regionali, per la raccolta di dati clinici e strumentali dai reparti di neurologia piemontesi con ricovero in sede dei casi di EST giunti all’osservazione.

    In sede vengono effettuati anche il prelievo, la raccolta, la conservazione di tessuti e altri materiali biologici e si svolgono successive indagini neurobiologiche quali:

     1 la ricerca della proteina 14 3 3 su liquor;

     2 determinazione genotipo del codone 129;

     3 determinazione della sequenza del gene della PrP,

     4 ricerca della PrP proteasi resistente a livello tissutale;

     5 determinazione del sottotipo di PrP. Le indagini neuropatologiche vengono effettuate in collaborazione con dipartimento di Neuroscienze dell’Università di Torino. Si intende inoltre fare promozione attiva delle attività e condivisione delle informazioni raccolte con altri centri.

  4. In vivo anticancer evaluation of the hyperthermic efficacy of anti-human epidermal growth factor receptor-targeted PEG-based nanocarrier containing magnetic nanoparticles

    Directory of Open Access Journals (Sweden)

    Baldi G

    2014-06-01

    Full Text Available Giovanni Baldi,1 Costanza Ravagli,1 Filippo Mazzantini,1 George Loudos,2 Jaume Adan,3 Marc Masa,3 Dimitrios Psimadas,2 Eirini A Fragogeorgi,2 Erica Locatelli,4 Claudia Innocenti,5,6 Claudio Sangregorio,5,7 Mauro Comes Franchini4 1CERICOL, Sovigliana-Vinci, Italy; 2Technological Educational Institute of Athens, Athens, Greece; 3Leitat Technological Center, Barcelona, Spain; 4Department of Industrial Chemistry Toso Montanari, University of Bologna, Bologna, 5Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM, 6Dipartimento di Chimica U Schiff, Università di Firenze, Firenze, 7Centro Nazionale delle Ricerche (ICCOM – CNR, Firenze, Italy Abstract: Polymeric nanoparticles with targeting moieties containing magnetic nanoparticles as theranostic agents have considerable potential for the treatment of cancer. Here we report the chemical synthesis and characterization of a poly(D,L-lactide-co-glycolide-b-poly(ethylene glycol-based nanocarrier containing iron oxide nanoparticles and human epithelial growth factor receptor on the outer shell. The nanocarrier was also radiolabeled with 99mTc and tested as a theranostic nanomedicine, ie, it was investigated for both its diagnostic ability in vivo and its therapeutic hyperthermic effects in a standard A431 human tumor cell line. Following radiolabeling with 99mTc, the biodistribution and therapeutic hyperthermic effects of the nanosystem were studied noninvasively in vivo in tumor-bearing mice. A substantial decrease in tumor size correlated with an increase in both nanoparticle concentration and local temperature was achieved, confirming the possibility of using this multifunctional nanosystem as a therapeutic tool for epidermoid carcinoma. Keywords: magnetic nanoparticles, polymeric nanocarriers, skin cancer, hyperthermia, single-photon emission computed tomography, imaging

  5. A glorious, yet almost forgotten, mathematical theory, and some possibly new applications of it to physics; Una gloriosa ma quasi dimenticata teoria matematica e certe sue inedite applicazioni alla fisica

    Energy Technology Data Exchange (ETDEWEB)

    Lo Surdo, C. [ENEA, Divisione Fusione Centro Ricerche Frascati, Rome (Italy)

    2001-07-01

    Hardly the role and the importance of Classical-Invariant Theory is the history of mathematics (say, between - 1850 and - 1920) can be fully appreciated by a nonspecialist. In this study, it was firstly purposed to provide a compact sketch of its foundations starting from (and keeping the framework of) some very basic ideas in the equation theory; and then, after reviewing a couple of classical examples, to illustrate a number of (presumably new) applications to physics, with special reference to constitutive relations in continuous material media. As a significant example of the latter type (amongst other ones), it shall be completely worked out the problem of the a priori structure of linear viscous-stress tensor in a magnetoplasma. [Italian] Non e' facile, da parte del non-specialista, apprezzare pienamente il ruolo e l'importanza della Teoria degli Invarianti Classici nella storia della matematica (diciamo all'incirca tra il 1850 e il 1920). In questo studio, il lettore trova anzitutto una rassegna, succinta ma largamente improntata alla generalita', dei suoi fondamenti a partire da poche idee di base della teoria delle equazioni, oltre ad un breve inquadramento storico e alla illustrazione di un paio di esempi classici. Seguono poi alcune applicazion - presuntivamente nuove - alla fisica matematica, con particolare riferimento alle relazioni costitutive in mezzi materiali continui. Come significativo esempio di applicazione di quest'ultimo tipo, e' infine completamente sviluppato il calcolo della struttura a priori del tensore di viscosita' lineare in un magnetoplasma.

  6. PAROLE, LINGUE E ALFABETI NELLA CLASSE MULTICULTURALE

    Directory of Open Access Journals (Sweden)

    Graziella Favaro

    2012-07-01

    Full Text Available Il bilinguismo è soprattutto un’opportunità e una ricchezza perché la padronanza di due lingue amplia le frontiere delle possibilità e il mondo si allarga di conseguenza. Ma che cosa succede quando in epoche diverse della vita – nella prima infanzia, nell’infanzia o nell’adolescenza – a causa del viaggio di migrazione, una nuova lingua entra a far parte del patrimonio linguistico dei bambini? Quali rapporti profondi  di concorrenza, conflitto, complementarietà, integrazione  si stabiliscono tra i due codici, tra i diversi significati e i significanti? E se la lingua madre diventa improvvisamente muta e una nuova lingua sostituisce quella originaria, quali cambiamenti e perdite si verificano nella vita emotiva dei bambini venuti da lontano? Sono queste alcune delle domande a cui il contributo si propone di rispondere, analizzando la condizione bilingue  variegata e molteplice  degli alunni stranieri in Italia e presentando alcuni progetti significativi e materiali innovativi per valorizzare la pluralità linguistica della classe.WORDS, LANGUAGES AND ALPHABETS IN THE MULTICULTURAL CLASSROOMBilingualism is above all an opportunity and a richness, since mastering two languages creates greater possibilities and the world expands as a consequence. But what happens in different stages of life- in childhood or adolescence- due to migration, when a new language becomes part of a child’s heritage? What profound relationships –competition, conflict, complementarity, integration- are established between the two codes, between different meanings and signifiers? And if the new language renders the mother tongue mute, what changes and losses take place in the emotional sphere of migrant children? These are a few of the questions which the paper attempts to answer, by analyzing the varied and multifaceted bilingual condition of foreign students in Italy. The paper presents a few important projects and innovative materials to give

  7. Advanced welding for closed structure. Pt. 1 The magnetic approach

    Energy Technology Data Exchange (ETDEWEB)

    Sacripanti, A.; Paoloni, M.; Sagratella, G. [ENEA Centro Ricerche Casaccia, Rome (Italy). Dipt. Innovazione

    1999-07-01

    This report describes the activities developed for the European Contract BRITE AWCS III to study the use of magnetic sensing techniques to obtain an accurate detection of the internal reinforcement of the closed steel structures employed in the shipbuilding industry. After a description of the methods, techniques and problems for the magnetic testing of materials in the conventional approach, a new method was tried to obtain the wanted results. The obtained conclusion shows that the magnetic non destructive testing approach produce very small effects to measure, are too much sensible to the anisotropy of the magnetic properties of the steel plates and to the quality of the contact with the reinforcement. This system is not flexible enough to assemble a sensing for the goal of the BRITE AWCS III. [Italian] Questo rapporto descrive le attivita' sperimentali sviluppate nell'ambito del contratto europeo BRITE AWCS III, in cui si sono utilizzate tecniche magnetiche per ottenere un preciso rilevamento dei rinforzi interni di strutture metalliche chiuse utilizzate nell'industria delle costruzioni navali. Dopo la descrizione dei metodi, delle tecniche e dei problemi riguardanti il testing magnetico dei materiali, e' stato introdotto un approccio innovativo basato su elettromagneti costruiti ad hoc. Le conclusioni ottenute mostrano che nel nuovo approccio, il testing magnetico non distruttivo produce perturbazioni troppo piccole per essere correttamente apprezzate, risulta inoltre troppo legato alle anisotropie ed alla qualita' del contatto tra piatto e web ed infine esso appare poco flessibile per soddisfare le richieste tecniche del BRITE AWCS III.

  8. L'uso del doppiaggio e del sottotitolaggio nell'insegnamento della L2: Il caso della piattaforma ClipFlair

    Directory of Open Access Journals (Sweden)

    Lupe Romero

    2016-01-01

    , where the users can find materials – including activities, clips and tutorials – collaborate through groups, send feedback through forums, etc.   Keywords: foreign learning language; translation; subtitling; dubbing; video.   Riassunto – Lo scopo di questo articolo è quello di presentare il progetto Clipflair, una piattaforma web per l'apprendimento delle lingue straniere (L2 attraverso la risonorizzazione (revoicing e il sottotitolaggio (captioning nei filmati. L’uso di materiale audiovisivo nelle aule di lingua è una pratica frequente per gli insegnanti in quanto introduce varietà linguistiche, mostra elementi culturali non verbali e, ciò che è più importante, presenta aspetti linguistici e culturali della comunicazione nel loro contesto. Tuttavia, gli insegnanti che usano gli audiovisivi hanno la difficoltà di trovare attività che permettano un ruolo attivo degli studenti al di là della semplice visione del film. ClipFlair permette di lavorare con materiale audiovisivo in modo produttivo e anche motivante, chiedendo agli studenti di fare il revoicing  o il sottotitolaggio di un filmato. Revoicing è un termine usato per riferirsi alla risonorizzazione di un filmato, come sarebbe il doppiaggio, il libero commento, l’audiodescrizione o il karaoke. Il termine captioning fa riferimento all’inserimento di un testo scritto sul filmato come nel caso dei sottotitoli convenzionali oppure i commenti o gli intertitoli. I filmati possono essere brevi file di video o audio, compresi i documentari, scene di film, notizie, animazioni e canzoni. ClipFlair sviluppa materiali che permettono agli studenti di lingue straniere di mettere in pratica le quattro abilità basilari del QCER: scrivere, parlare, ascoltare e leggere. Nell’ambito del progetto, sono state elaborate più di 350 attività di doppiaggio e/o sottotitolaggio. Queste attività sono state create per più di 16 lingue tra cui l’inglese, lo spagnolo e l’italiano, ma soprattutto ci sono attivit

  9. Chemical Production using Fission Fragments; Emploi des fragments de fission dans la production de substances chimiques; Ispol'zovanie produkto v raspada v khimicheskom proizvodstve; Empleo de los fragmentos de fision en la industria quimica

    Energy Technology Data Exchange (ETDEWEB)

    Dawson, J K; Moseley, F [AERE, Harwell (United Kingdom)

    1960-07-15

    'eau. Aucun des systemes etudies jusqu'a present ne parait offrir de possibilites interessantes pour la grande industrie chimique. (author) [Spanish] En una memoria presentada en la segunda Conferencia Internacional sobre la Utilizacion de la Energia Atomica con Fines Pacificos [A/Conf. 15/P. 76] se expusieron algunas consideraciones , atendiendo al diseno de los reactores, sobre la utilizacion de la energia de retroceso de los fragmentos de fision para la produccion de ciertos compuestos quimicos de importancia industrial. La presente memoria pasa revista a los progresos realizados desde entonces en esta materia por el Atomic Energy Research Establishment de Harwell. Los autores examinan la relacion entre el alcance y la energia para los fragmentos de fision al discutirse la eleccion del combustible para un reactor destinado a la produccion de compuestos quimicos y describen la variacion de efecto quimico observada a lo largo de la trayectoria de los fragmentos de fision en la irradiacion de mezclas de nitrogeno y oxigeno. Analizan tambien los resultados de investigaciones recientes acerca de los efectos de fragmentos de fision sobre mezclas de monoxido de carbono e hidrogeno y sobre el vapor de agua. Al parecer, ninguno de los sistemas estudiados hasta la fecha ofrece perspectivas particularmente interesantes para la industria quimica pesada. (author) [Russian] V doklade, predstavlennom ran'she na Vtoroj mezhdunarodnoj konferentsii Organizatsii Ob'edinennykh Natsij po mirnomu ispol'zovaniyu atomnoj ehnergii (A/Conf. 15/P. 76) v svyazi s konstruktsiej reaktorov obsuzhdalis' nekotorye soobrazheniya otnositel'no vozmozhnosti ispol'zovaniya ehnergii otdachi produktov raspada dlya proizvodstva vazhnykh dlya promyshlennosti khimikaliev. V nastoyashchem doklade rezyumiruyutsya bolee nedavnie rezul'taty, dostignutye v ehtoj oblasti Nauchno-issledo-vatel'skim institutom po atomnoj ehnergii v KHaruehlle. Sootnoshenie mezhdu prokhodimym rasstoyaniem i ehnergiej produktov deleniya

  10. The Public Health Problems of Nuclear Waste Disposal; L'Elimination des Dechets Radioactifs et la Sante Publique; 041f 0420 041e 0414 ; Problemas que Presenta para la Salud Publica la Evacuacion de Desechos Radiactivos

    Energy Technology Data Exchange (ETDEWEB)

    Dunster, H. J. [United Kingdom Atomic Energy Authority, Health and Safety Branch (United Kingdom)

    1960-07-01

    problemes que pose la fixation d'un taux maximum en ce qui concerne l'evacuation des dechets dans les rivieres, leur enfouissement' dans le sol ou leur immersion dans les eaux profondes de la mer. L'auteur conclut qu'il est possible de demontrer sans difficulte que la plupart des solutions proposees offrent toutes les garanties de securite voulues, mais qu'une enquete et un controle rigoureux sont necessaires lorsque des doses substantiefles de radioactivite peuvent se repandre dans une zone d'habitat humain. (author) [Spanish] Los principios en que se base la solucion de los problemas que presenta para la salud publica la evacuacion de desechos radiactivos son las recomendaciones de la Comision Internacional para la Proteccion Radiologica. Estas recomendaciones no pueden ser aplicadas directamente a Ja evacuacion de desechos debido a que la radiactividad producida no alcanza casi nunca al hombre en forma directa. Asi pues, para establecer las cifras maximas de descarga radiactiva admisibles es preciso conocer no solamente la forma en que el hombre emplea el medio que le rodea sino tambien los distintos procesos que rigen el comportamiento de las materias radiactivas en ese medio precisamente. Como ejemplo de la forma en que el Reino Unido ha tratado estos problemas, el autor de la memoria hace un estudio de la descarga de desechos liquidos de baja actividad en el mar y se refiere brevemente a los problemas similares que plantea el control de las descargas en rios y de la evacuacion en el suelo o en alta mar. Llega a la conclusion de que es posible demostrar sin dificultad el grado de seguridad de la mayoria de las operaciones propuestas para evacuacion de desechos, pero que es necesaria una investigacion y un control meticulosos siempre que haya que evacuar desechos de alto nivel radiactivo en las proximidades de habitaciones humanas. (author) [Russian] Rekomendacii Mezhdunarodnoj komissii po zashhite ot radioaktivnogo obluchenija javljajutsja fundamental'noj osnovoj

  11. Improving the performance of nickel-coated fluorine-doped tin oxide thin films by magnetic-field-assisted laser annealing

    Energy Technology Data Exchange (ETDEWEB)

    Li, Bao-jia, E-mail: li_bjia@126.com [School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013 (China); Jiangsu Provincial Key Laboratory of Center for Photon Manufacturing Science and Technology, Jiangsu University, Zhenjiang 212013 (China); Huang, Li-jing [School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013 (China); Jiangsu Provincial Key Laboratory of Center for Photon Manufacturing Science and Technology, Jiangsu University, Zhenjiang 212013 (China); Ren, Nai-fei [Jiangsu Provincial Key Laboratory of Center for Photon Manufacturing Science and Technology, Jiangsu University, Zhenjiang 212013 (China); School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013 (China); Kong, Xia; Cai, Yun-long; Zhang, Jie-lu [Jiangsu Tailong Reduction Box Co. Ltd., Taixing 225400 (China)

    2015-10-01

    Highlights: • Ni/FTO films were prepared by sputtering Ni layers on commercial FTO glass. • The as-prepared Ni/FTO films underwent magnetic-field-assisted laser annealing. • Magnetic field and laser fluence were crucial for improving quality of the films. • All Ni/FTO films displayed enhanced compactness after magnetic laser annealing. • Magnetic laser annealing using a fluence of 0.9 J/cm{sup 2} led to the best film quality. - Abstract: Nickel-coated fluorine-doped tin oxide (Ni/FTO) thin films were prepared by sputtering Ni layers on commercial FTO glass. The as-prepared Ni/FTO films underwent nanosecond pulsed laser annealing in an external magnetic field (0.4 T). The effects of the presence of magnetic field and laser fluence on surface morphology, crystal structure and photoelectric properties of the films were investigated. All the films displayed enhanced compactness after magnetic-field-assisted laser annealing. It was notable that both crystallinity and grain size of the films gradually increased with increasing laser fluence from 0.6 to 0.9 J/cm{sup 2}, and then decreased slightly with an increase in laser fluence to 1.1 J/cm{sup 2}. As a result, the film obtained by magnetic-field-assisted laser annealing using a fluence of 0.9 J/cm{sup 2} had the best overall photoelectric property with an average transmittance of 81.2%, a sheet resistance of 5.5 Ω/sq and a figure of merit of 2.27 × 10{sup −2} Ω{sup −1}, outperforming that of the film obtained by pure laser annealing using the same fluence.

  12. The State of the Art. Bridge Protective Systems and Devices.

    Science.gov (United States)

    1978-10-01

    FOR 19=1 TO L4 STEP 1 1255 LET J=(I-1)*14+1 1268 LET LS=J+13 1265 LET L5=INT( L53 1278 FOR J9=J TO L5 STEP 1 1275 READ :1,"(J9) 1277 NEXT J9 1288 NEXT...T=R 2960 MAT R=T*B 2976 MAT T=R 2986 MAT R= TD 2996 "AT T=R 308 MAT R=T*E 3010 RE

  13. Chemically triggered ejection of membrane tubules controlled by intermonolayer friction.

    Science.gov (United States)

    Fournier, J-B; Khalifat, N; Puff, N; Angelova, M I

    2009-01-09

    We report a chemically driven membrane shape instability that triggers the ejection of a tubule growing exponentially toward a chemical source. The instability is initiated by a dilation of the exposed monolayer, which is coupled to the membrane spontaneous curvature and slowed down by intermonolayer friction. Our experiments are performed by local delivery of a basic pH solution to a giant vesicle. Quantitative fits of the data give an intermonolayer friction coefficient b approximately 2x10;{9} J s/m;{4}. The exponential growth of the tubule may be explained by a Marangoni stress yielding a pulling force proportional to its length.

  14. ARPA-NRL Laser Program - Semiannual Technical Report to Defense Advanced Research Projects Agency, 1 January 1974-30 June 1974

    Science.gov (United States)

    1975-04-01

    Johnson and R.G, Fijw!’r, I. Chem. I’hys P. Millet , i. Salamero, n. Brunei, J. Goly, Ü. Bl.inc, and J, L. fuysslri...Chem Phys. 53, 1004 (1970). i «. wnem. ’Reference 4. ’P. Millet , Y. Salamero, H. Brunei, ,1. Galv. D. Blanc and J.L. reysster, J, Chem...1973) . 7. N. Djeu and R. Burnham, to be published. 8. P. Jean , M. Martin, J.P. Barrat, and J.L. Cojan, Compt. Rend. 264B, 609 (1967). 9. J.P

  15. types sat 1 and sat 2 in bhk, bk, vero and lk cell

    African Journals Online (AJOL)

    BSN

    i\\IATERIALS AND i\\IETllODS. Viruses: 1\\ total or 14 F~~[) ,·1rus isolates \\\\l'l"L' used. I hesc include. :\\ig I 9..J ..... CELLS LOG TCI. DR50. 3.24. 119 ... 3.4 1. 4.25. 4.56. 5.25. 4.38. ·---. --I. I. TABLE IV: TITRE OF SOME SAT 2 STRAINS OF F\\1D IN BTY urns AND BHK - 21. CELLS. VIRUS STRAINS TITRE IN BTY. 1 l"IRE 11 IBRS ...

  16. Final Remedial Investigation Sampling Plan Addendum. Milan Army Ammunition Plant Remedial Investigation Southern Study Area (Operable Unit No. 5)

    Science.gov (United States)

    1997-09-01

    91-D-0012 Task Order No. 0007 2.4.7 Milan Army Ammunition Plant, Phytoremediation Pilot Study, USAEC, 1996 .. .............................. 2-28 2.5...indicated that heavy metal contamination (lead, chromium, and mercury ) was present at relatively low levels, and explosive contamination was limited to...and MI172 where lead was found at 22.9 j.g/1 and 18.4 Ig/l, respectively. 2.4.7 Milan Army Ammunition Plant, Phytoremediation Pilot Study, USAEC, 1996

  17. NATO Planning Guide for the Estimation of Chemical, Biological, Radiological, and Nuclear (CBRN) Casualties (AMedP-8(C)) - Parameters for Estimation of Casualties from Exposure to Specified Biological Agents. Addenda to Allied Medical Publication 8

    Science.gov (United States)

    2011-01-01

    no. 2510 (1909): 319–25; I. Sobol , “A Case of Chronic Nasal Glanders,” Acta Oto-Laryngologica 18, no. 4 (1933): 500–9; J. F. Burgess, “Chronic...Observations on Human Glanders;” Sobol , “A Case of Chronic Nasal Glanders;” Burgess, “Chronic Glanders;” Herold and Erickson, "Human Glanders: Case...Human Subject;” Hunting, Glanders: A Clinical Treatise; Bernstein and Carling, “Observations on Human Glanders;” Sobol , “A Case of Chronic Nasal

  18. A comparison of different quasi-newton acceleration methods for partitioned multi-physics codes

    CSIR Research Space (South Africa)

    Haelterman, R

    2018-02-01

    Full Text Available & structures, 88/7, pp. 446–457 (2010) 8. J.E. Dennis, J.J. More´, Quasi-Newton methods: motivation and theory. SIAM Rev. 19, pp. 46–89 (1977) A Comparison of Quasi-Newton Acceleration Methods 15 9. J.E. Dennis, R.B. Schnabel, Least Change Secant Updates... Dois Metodos de Broyden. Mat. Apl. Comput. 1/2, pp. 135– 143 (1982) 25. J.M. Martinez, A quasi-Newton method with modification of one column per iteration. Com- puting 33, pp. 353–362 (1984) 26. J.M. Martinez, M.C. Zambaldi, An Inverse Column...

  19. Advanced Concepts of Naval Engineering Maintenance Training. Volume 2. Appendix F

    Science.gov (United States)

    1976-05-01

    maintenance instruction, the Hagan Automatic Boiler Control (ABC) course. These job requirements also included the tasks, skills, and knowledges for all...Pressure 1 3/4 NAVTRAEQÜIPCEN 74-C-0151-1 TABLE OF CONTENTS VOLUME II OF II APPENDIX F Page Hagan Automatic Boiler Controls Systems (FAS) 6...a c a ■* w ■H u 0 M « s? u ’• B n J-riH 3 o c 0 hhO a a o -i •H -I 0 -H 9J ■ a a oi « C -a u <rl « vi) •a - 8 ai >> u u

  20. Pyrethroid Resistance in Malaysian Populations of Dengue Vector Aedes aegypti Is Mediated by CYP9 Family of Cytochrome P450 Genes.

    Science.gov (United States)

    Ishak, Intan H; Kamgang, Basile; Ibrahim, Sulaiman S; Riveron, Jacob M; Irving, Helen; Wondji, Charles S

    2017-01-01

    Dengue control and prevention rely heavily on insecticide-based interventions. However, insecticide resistance in the dengue vector Aedes aegypti, threatens the continued effectiveness of these tools. The molecular basis of the resistance remains uncharacterised in many endemic countries including Malaysia, preventing the design of evidence-based resistance management. Here, we investigated the underlying molecular basis of multiple insecticide resistance in Ae. aegypti populations across Malaysia detecting the major genes driving the metabolic resistance. Genome-wide microarray-based transcription analysis was carried out to detect the genes associated with metabolic resistance in these populations. Comparisons of the susceptible New Orleans strain to three non-exposed multiple insecticide resistant field strains; Penang, Kuala Lumpur and Kota Bharu detected 2605, 1480 and 425 differentially expressed transcripts respectively (fold-change>2 and p-value ≤ 0.05). 204 genes were commonly over-expressed with monooxygenase P450 genes (CYP9J27, CYP6CB1, CYP9J26 and CYP9M4) consistently the most up-regulated detoxification genes in all populations, indicating that they possibly play an important role in the resistance. In addition, glutathione S-transferases, carboxylesterases and other gene families commonly associated with insecticide resistance were also over-expressed. Gene Ontology (GO) enrichment analysis indicated an over-representation of GO terms linked to resistance such as monooxygenases, carboxylesterases, glutathione S-transferases and heme-binding. Polymorphism analysis of CYP9J27 sequences revealed a high level of polymorphism (except in Joho Bharu), suggesting a limited directional selection on this gene. In silico analysis of CYP9J27 activity through modelling and docking simulations suggested that this gene is involved in the multiple resistance in Malaysian populations as it is predicted to metabolise pyrethroids, DDT and bendiocarb. The predominant

  1. Pinpointing P450s Associated with Pyrethroid Metabolism in the Dengue Vector, Aedes aegypti: Developing New Tools to Combat Insecticide Resistance

    OpenAIRE

    Stevenson, Bradley J.; Pignatelli, Patricia; Nikou, Dimitra; Paine, Mark J. I.

    2012-01-01

    Background\\ud \\ud Pyrethroids are increasingly used to block the transmission of diseases spread by Aedes aegypti such as dengue and yellow fever. However, insecticide resistance poses a serious threat, thus there is an urgent need to identify the genes and proteins associated with pyrethroid resistance in order to produce effective counter measures. In Ae. aegypti, overexpression of P450s such as the CYP9J32 gene have been linked with pyrethroid resistance. Our aim was to confirm the role of...

  2. Linear and Nonlinear Time-Frequency Analysis for Parameter Estimation of Resident Space Objects

    Science.gov (United States)

    2017-02-22

    Vector Machines”, IEEE Trans. on Neural Networks , vol. 13(2), March 2002. [11] T. M. Mitchell, “Machine Learning”, McGraw-Hill, 1997 76DISTRIBUTION A...by the observer is given by: L = n∑ j=1 S(µ, µ0, α)ρjaj (31) where S is the scattering law (or Bidirectional Reflectance Distribution Function, BRDF...vector ma- chine learning”, Adv. Neural Information Processing Systems (NIPS*2000), Cambridge, MA, MIT Press, vol.13, 2001. [9] J., Wetson, and C

  3. Naval Aircraft Operating and Support Cost-Estimating Model - FY77 Revision

    Science.gov (United States)

    1979-02-01

    cont’d.) SAMPLE DPERflTING AND SUPPDRT COST ESTIMATE CTHQUSAMtiS DP FY77S:> iso AVERAGE AHNUAL TDTflL COST COST PER UE 10 AC TDTflL 939...0 01 1 1 0 0 J 9 ? 9 p 14 0 0J 15 0 0, 9 1 P 1700J 18ij 0 P 1900 P 9p £1 0 0 P £8 00 P 9» £400 P 9J 9P 27001 £8 0 0 P 9p 3 000 £ P 31 01 j P 9 ? 3

  4. Shock Ignition Target Design for Inertial Fusion Energy

    Science.gov (United States)

    2010-01-01

    on the Nike KrF laser (0.248µm wavelength) are consistent with an intensity limit of about a factor of two higher8,9, and further experiments are...McLean, and C. Manka, “Observations of the Two Plasmon Decay Instability Driven by the Nike KrF Laser” submitted to Physical Review Letters. 9J. L...Lehmberg, J. A. Giuliani, and A. J. Schmitt, Journal Appl . Phys. 106, 023103 (2009). 17In general, we use V 2 ≡ I0.78R/ρ∆R, T ≡ R/V , E ≡ IR2T , and ṁ

  5. Crystal Growth and Characterization of THO2 and UxTh1-xO2

    Science.gov (United States)

    2013-03-01

    the opaqueness is a result of crystalline defects or a result of the Beer -Lambert law is difficult to say, though both factors are likely...Alloys and Compounds, vol. 451, no. 1–2, pp. 248–250, Feb. 2008. [5] S. L. Chaplot, R. Mittal, and N. Choudhury, Eds., Thermodynamic Properties of...Defective UO 2 (100),” The Journal of Physical Chemistry B, vol. 108, no. 7, pp. 2362–2364, Feb. 2004. [9] J. M. Haschke, “ Thermodynamics of water

  6. NF-kappa B activity in T cells stably expressing the Tax protein of human T cell lymphotropic virus type I

    International Nuclear Information System (INIS)

    Lacoste, J.; Cohen, L.; Hiscott, J.

    1991-01-01

    The effect of constitutive Tax expression on the interaction of NF-κ B with its recognition sequence and on NF-κ B-dependent gene expression was examined in T lymphoid Jurkat cell lines (19D and 9J) stably transformed with a Tax expression vector. Tax expressing T cell lines contained a constitutive level of NF-κ B binding activity, detectable by mobility shift assay and uv cross-linking using a palindromic NF-κ B probe homologous to the interferon beta PRDII site. In Jurkat and NC2.10 induction with phorbol esters resulted in the appearance of new DNA binding proteins of 85, 75, and 54 kDa, whereas in Tax expressing cells the 85-kDa protein and a 92-kDa DNA binding protein were constitutively induced. Expression of Tax protein in 19D and 9J resulted in transcription of the endogenous NF-kappa B-dependent granulocyte-macrophage colony stimulating factor gene and increased basal level expression of transfected NF-kappa B-regulated promoters. Nonetheless transcription of both the endogenous and the transfected gene was inducible by PMA treatment. Tax expression in Jurkat T cells may alter the stoichiometry of NF-kappa B DNA binding proteins and thus change the expression of NF-kappa B-regulated promoters

  7. FT-IR emissivity measurements of Nb melt using an electrostatic levitation furnace

    International Nuclear Information System (INIS)

    Sakata, K.; Watanabe, Y.; Okada, J.T.; Kumar, M.V.; Paradis, P.-F.; Ishikawa, T.

    2015-01-01

    Highlights: • Since molten Nb has a high melting point, its thermal properties were measured using FT-IR combined with an electrostatic levitator. • The measured ε_T of molten Nb at the melting temperature in this study was 0.29, and the C_p was calculated as 41.9 J ⋅ mol"−"1 ⋅ K"−"1. - Abstract: Total hemispherical emissivity (ε_T) and constant pressure heat capacity (C_p) of molten Nb, which has a high melting point, was measured using FT-IR combined with an electrostatic levitator. In order to heat the sample to temperatures higher than 2000 °C and avoid chemical reactions between the sample and a crucible, a containerless method was needed. By applying these methods, the measured ε_T of molten Nb at the melting temperature was 0.29, and the C_p was calculated as 41.9 J ⋅ mol"−"1 ⋅ K"−"1. Both data showed good agreement with the literature values. In addition, the result was compared with the Drude model and the difference of emissivity between Zr and Nb was discussed.

  8. Elementi di Icnografia mediterranea (Protonuraghi a camera naviforme

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    Manca Demurtas, Lucia

    1991-12-01

    Full Text Available Not available

    Definimos como protonuraghi con cámara «naviforme» aquellos nuraghi caracterizados por un corredor o espacio principal que, por ampliación de las paredes laterales, se transforma en cámara Esta presenta la parte posterior en forma de ábside semicircular y la cubierta en ojiva. El tipo, ya examinado por nosotros en el ámbito de un análisis general, aunque preliminar, sobre los protonuraghi, parece, por el momento, preludiar. en una propuesta de evolución arquitectónica, al nuraghe en tholos. Nuestro análisis no intenta fijar los puntos cronológicos en el interior del paso evolutivo aunque parece presumible que la creación y la difusión de este tipo de monumento pueda encuadrarse entre el Bronce antiguo y el Bronce medio teniendo en cuenta también los datos materiales adquiridos hasta ahora. Aunque sin infravalorar un posible aporte externo en la definición del tholos, parece igualmente evidente que la aceptación de tal modelo arquitectónico no pudo ser tan contrastante con la experiencia ya adquirida. [it] Definiamo protonuraghi con camera «naviforme» quei nuraghi il cui elemento caratterizzante è il corridoio o spazio principale che per l'ampliamento delle pareti laterali si muta in camera. Essa presenta la parte posteriore in forma di abside semicircolare e la copertura ad ogiva . II tipo, da noi giii preso in esame nell'ambito di un'analisi generale, seppure preliminare, sui protonuraghi, sembrerebbe, al momento, preludere, in una proposta di evoluzione architettonica, al nuraghe a tholos. La nostra analisi esula dall'intento di fissare dei punti cronologici all'interno del passaggio evolutivo anche se appare presumibile che la creazione e la diffusione di questo tipo di monumento possa inquadrarsi tra il Bronzo antieo e il Bronzo medio tenendo conto anche dei dati materiali fin' ora acquisiti. Anche non sottovalutando un possibile apporto estemo nel definirsi della

  9. Pyrolysis process application on scrap tyres. Experimental results on pilot scale; Applicazione del processo di pirolisi al trattamento del granulato di pneumatico. Sperimentazione su impianto pilota

    Energy Technology Data Exchange (ETDEWEB)

    Galvagno, S.; Casu, S.; Casabianca, T.; Calabrese, A.; Cornacchia, G. [ENEA, Dipartimento Ambiente, Centro Ricerche Trisaia, Rotondella, MT (Italy)

    2001-04-01

    The world production of waste tyres amounts to 5 {center_dot} 10{sup 6} ton/year, 2 {center_dot} 10{sup 6} tons of which are produced in Europe; the Italian production of waste tyres is up to 360 thousand tons per year. Even today, the final destination of nearly 65-70% of waste tyres is the landfill, legal or illegal; but this solution seems to be not so advantageous, as far as the high added value materials lost and the environmental impact are concerned. Treatments alternative to land filling take into account the tyres reconstruction and reuse or the matter and/or energy recovery by means of thermal treatment processes. With respect to the latter processes, the pyrolysis process definitely shows the less environmental impact and gets to process products (gases, oils and solid residue) able to be back on the market after the suitable treatment. Present work shows the results of the pyrolysis process experimental survey on tyres granulate, developed on the pilot plant of ENEA-Trisaia Research Centre. [Italian] La produzione mondiale di pneumatici usati conta annualmente piu' di 5 milioni di tonnellate di cui 2 milioni generati in Europa: in Italia, sono generate circa 360 mila tonnellate l'anno di pneumatici usati. Il destino finale del 65-70% dei pneumatici usati e' ancora oggi lo smaltimento in discarica, sia essa autorizzata o abusiva; questa soluzione risulta poco vantaggiosa per la perdita di materiali che in precedenza possedevano un alto valore aggiunto e in termini d'impatto ambientale. Trattamenti alternativi alla discarica, prevedono la ricostruzione e il riutilizzo oppure il recupero di materia e/o di energia mediante processi di trattamento termico. Tra questi ultimi il processo di pirolisi presenta senz'altro il minor impatto ambientale e conduce a prodotti di processo (gas, olii e residuo solido) che, opportunamente trattati, possono essere immessi sul mercato. Questo lavoro presenta i risultati della sperimentazione del

  10. E-books for Italian school, between Law Requirements and Publishers' Choices L'ebook per le scuole italiane fra requisiti normativi e scelte editoriali

    Directory of Open Access Journals (Sweden)

    Maria Vincelli

    2011-12-01

    Full Text Available

    Il saggio presenta un'analisi del quadro legislativo italiano sulla transizione dei libri di testo dal formato cartaceo a quello digitale, oltre a una panoramica sull'offerta dei maggiori editori a riguardo, prendendo come esempio i libri di testo di Latino per le scuole superiori. Il concetto di libro digitale viene declinato oggi principalmente in due forme: il libro "on-line", digitale (generalmente in PDF o Epub, equivalente ai testi tradizionali a stampa per struttura e tipo di utilizzo; il libro che integra le caratteristiche del libro sia digitale che a stampa con una serie di materiali digitali supplementari. L'opinione dell'autrice è che l'offerta di pubblicazioni scolastiche in formato digitale si attiene a un'interpretazione limitata della legge italiana, e che dunque si prospettano nuove ipotesi che possano unire in modo efficace l'autorevolezza e il valore culturale dei libri di testo con le soluzioni più avanzate del digitale.

    This paper offers an analysis of the Italian legislation about the transition from printed school-books to digital ones and, in turn, it presents an overview of the digital publishing offer of major media groups, by taking as case study the Latin textbooks for high-schools. The concept of digital book has been declined nowadays in two main forms: the first one is the so-called "on-line book", which are digital books (typically in PDF or ePub format equivalent in structure and in the mode of use to classical printed books; the latter form integrates printed or digital books with a set of varied, and often incoherent, supplementary digital materials. The conclusion is that the current offer of digital publishing about school-books is a narrow interpretation of the Italian legislation, and thus it foresees the design of new paradigms that efficaciously merge the authoritativeness and cultural value of school-books with the advanced features and the new way of uses of digital media.

  11. Didattica online

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    L. Charrier

    2003-05-01

    Full Text Available

    Obiettivi: formare un gruppo di operatori della Facoltà di Medicina e Chirurgia alle metodiche di progettazione e gestione di processi di didattica integrata basati sull’uso di tecnologie e risorse di rete, al fine di produrre e pubblicare materiale ODL per la Facoltà. Nel caso specifico, il progetto da realizzare era il modulo “Il rischio biologico” nell’ambito del corso “Rischio lavorativo in ambito sanitario”, allo scopo di integrare l’attività d’aula e offrire un pacchetto formativo cui i corsi di laurea interessati possano accedere per la didattica e la valutazione.

    Materiali e metodi: l’azione formativa è stata condotta con la tecnica “project based”, basata cioè sullo sviluppo di un progetto da parte dei borsisti. Le attività sono state articolate come incontri e attività di esercitazione in presenza sugli strumenti di produzione del materiale didattico (DreamWeaver, attività in “computer conferencing” sui temi trattati a lezione, attività di studio individuale assistite a distanza e attività assistita, sia in presenza che a distanza, di progettazione e realizzazione dei moduli didattici da fruirsi in rete con approccio ODL. Risultati: é stato prodotto il modulo “Il rischio biologico”, destinato agli studenti dei Corsi di Laurea della Facoltà di Medicina e Chirurgia e delle Scuole di Specializzazione. Il modulo è stato strutturato in quattro unità didattiche (Legislazione, Precauzioni, Misure di contenimento, Vaccinazioni, ciascuna delle quali contiene documenti di lettura e consultazione, riferimenti normativi in materia di rischio in ambito sanitario, immagini che presentano comportamenti (utilizzo dei DPI, lavaggio delle mani…, esercizi e test di autovalutazione con feedback e soluzioni consultabili online.

     Conclusioni: il modulo sarà fruibile online a partire dal I semestre dell’ anno accademico 2003-2004; si sta

  12. Reperti ceramici dalle campagne di ricognizione 2006-2008 del progetto R.I.M.E.M.: metodologie di lavoro e risultati / Pottery finds from the 2006-2008 field-walking campaigns of the R.I.M.E.M. project: methodology and results

    Directory of Open Access Journals (Sweden)

    Ana Konestra

    2015-12-01

    Full Text Available In questo contributo s’intende illustrare alcune valutazioni introduttive e metodologiche riguardanti il lavoro di studio e classificazione operato sui reperti ceramici del progetto R.I.M.E.M. e presentato nel dettaglio negli articoli a seguire (Konestra, Virgili. Il materiale da ricognizione presenta, infatti, numerose problematiche di riconoscimento e datazione, soprattutto per i secoli altomedievali, alle quali si è cercato di far fronte attraverso una catalogazione intensiva dei singoli reperti diagnostici, per mezzo di un database creato ad hoc. La seconda sezione dell’articolo è dedicata interamente ai dati ricavati dalle analisi archeometriche, effettuate dal dip. di Scienze della Terra dell’Università di Camerino (prof. E. Paris e focalizzate alla comprensione di alcuni aspetti tecnologici e produttivi riguardanti in particolare le classi morfologiche dei forni coperchio e dei paioli a cestello. Segue un breve paragrafo conclusivo sui risultati salienti delle indagini sui materiali di età romana e medievale e un catalogo degli impasti autopticamente riconosciuti e citati negli articoli successivi. This paper aims to illustrate introductory and methodological features peculiar to the study and classification of pottery finds yielded by the R.I.M.E.M. project surveys and presented in detail in the following papers (Konestra and Virgili. Field-walking finds, in fact, present numerous issues in recognition and dating, particularly for those of early Middle Age date, which we tried to overcome by intensive cataloguing of diagnostic shreds by means of an ad hoc database. A brief overview of the conclusions drawn from Roman and Medieval finds study is presented as well, with an appendix containing the fabric’s catalogue referred to in the following papers and compiled by macroscopic shred analysis. The second section of the paper is entirely dedicated to presenting the data from the archaeometric analysis carried out by the

  13. CORSO DI ITALIANO PER STUDENTI ANGLOFONI NEGLI USA: L’IMPORTANZA DEL LIBRO DI TESTO

    Directory of Open Access Journals (Sweden)

    Ilaria Sacchini

    2011-02-01

    Full Text Available L’insegnamento dell’italiano all’estero si colloca all’interno di un contesto specifico che deve essere tenuto in considerazione al momento della pianificazione di un corso di italiano LS. Dopo una analisi delle specifiche caratteristiche dell’ambiente universitario americano e delle difficoltà che lo studente incontra nell’apprendimento della lingua italiana in relazione alla sua lingua madre, l’attenzione si focalizza poi sul libro di testo, strumento fondamentale per lo studio e l’insegnamento/apprendimento della lingua straniera. Avanti!, manuale di lingua italiana utilizzato nei corsi di lingua italiana presso un’università americana, viene analizzato dal punto di vista glottodidattico attraverso una descrizione e una valutazione dettagliata della sua struttura, degli obiettivi linguistico- comunicativi e dei materiali didattici presenti, con particolare attenzione alla tipologia degli esercizi, nonché alla varietà di italiano presentata. Infine, vengono elencate alcune attività extra a completamento del corso di italiano da proporre agli studenti per un loro più ampio coinvolgimento nella lingua e nella cultura italiana.     Italian lessons for american english-speaking students: the importance of the textbook   Teaching Italian abroad takes place in a specific context which needs to be considered in planning Italian as a Foreign Language courses.  After analyzing the specific characteristics of the American university environment and the difficulty students have in learning the Italian language in comparison to their mother tongue, attention is focused on the textbook used, a fundamental tool for the study and learning/teaching of a foreign language. Avanti! is the textbook utilized in Italian language courses in American universities.  It is analyzed from a glottodidactic point of view through the detailed description and evaluation of its structure, the linguistic-communicative objectives and the didactic

  14. Star bene donna, star bene mamma: il counseling a sostegno della maternità presso l’Ospedale Macedonio Melloni di Milano

    Directory of Open Access Journals (Sweden)

    Roberta Riolo

    2013-12-01

    Full Text Available Il progetto “Star bene donna, star bene mamma – il Counseling a sostegno della maternità”, è finanziato dalla L.R. 23/99, ed è completamente gratuito per l’utenza. Finalità del progetto è la tutela della maternità, della genitorialità, della salute e del benessere della donna, rimuovendo ostacoli materiali e culturali tramite interventi integrati, con particolare attenzione alle situazioni di fragilità e in prevenzione all’uso dell’IVG. Il progetto, attivo da settembre 2011, prevede sei azioni svolte in modo integrato sul territorio cittadino, in collaborazione con alcuni Enti pubblici e strutture private: 1 Sostegno e accompagnamento alla donna, o coppia, attraverso sportello di Counseling attivo all’interno dell’Ospedale Macedonio Melloni e tramite lavoro di rete con Madre Segreta, servizio a tutela della maternità della Provincia di Milano. 2 Utilizzo del mediatore linguistico. 3 Formazione e orientamento al lavoro per donne in evidente stato di disagio economico all’interno di un’Associazione culturale per bambini, che offre servizi alle famiglie. 4 Fornitura pacchi alimentari per nuclei monoparentali o famiglie in provato stato di bisogno. 5 Formazione agli operatori su tematiche quali: la maternità migrante, la relazione e la comunicazione, la comunicazione difficile. 6 Formazione affettiva e sessuale ad adolescenti, volta a promuovere una sessualità consapevole e senza rischi. Il Counseling sistemico si inserisce in questo progetto come elemento di aiuto per la presa in carico tempestiva dell’utenza ospedaliera, offrendo un immediato spazio di confronto e di dialogo utile a raccogliere e identificare la difficoltà portata. Il lavoro del Counselor non è di ostacolo agli altri operatori in quanto si muove entro limiti ben chiari, anzi può essere di utilità alleggerendo, nello specifico, il lavoro di Psicologi e Psicoterapeuti per una presa in carico di tutte quelle situazioni di disagio evolutivo e pu

  15. Determination of lead in papers and cardboards for food packaging; La determinazione del piombo in carte e cartoni per alimenti. Giornata di studio

    Energy Technology Data Exchange (ETDEWEB)

    Costantini, S.; Giordano, R. [eds.] [Istituto Superiore di Sanita`, Rome (Italy). Lab. di Tossicologia Applicata

    1998-06-01

    matematico, puo` fornire in questo caso un valido aiuto. L`ideoneita` dei materiali utilizzati in un circuito di controllo di qualita` deveessere considerata come premessa esseniale alla valutazione dei risultati ottenuti, poiche` la performance dei laboratori e` influenzata dalla qualita` del materiale utilizzato. Il saggio collaborativo espletato nel 1997 e` stato articolato in quattro fasi mediante l`invio di campioni dicrescente difficolta` a 70 laboratori del Servizio Sanitario Nazionale.

  16. Upaya Meningkatkan Hasil Belajar Melalui Media Interactive Video pada Mata Diklat Memahami Prinsip-Prinsip Penyelengaraan Administrasi Perkantoran (Studi Kasus pada Kelas X Administrasi Perkantoran SMK Negeri 1 Batang Tahun Ajaran 2011/2012

    Directory of Open Access Journals (Sweden)

    Dewi Ciptaningsih

    2012-06-01

    Full Text Available Media interactive video suatu sistem penyampaian pengajaran dimana materi video rekaman disajikan dengan pengendalian komputer kepada penonton (siswa yang tidak hanya mendengar dan melihat video dan suara tetapi juga memberikan respon yang aktif. Memahami prinsip-prinsip penyelenggaraan administrasi perkantoran merupakan Kompetensi awal yang dipelajari siswa karena merupakan urat nadi dalam kegiatan administrasi Perkantoran. Subjek penelitian ini adalah siswa kelas X AP 1 SMK Negeri 1 Batang tahun ajaran 2011/2012. Prosedur penelitian ini terdiri dari dua siklus, meliputi perencanaan, tindakan, pengamatan dan refleksi. Metode pengumpulan data� adalah dokumentasi, lembar observasi kinerja guru dan aktivitas siswa, serta tes. Hasil penelitian yang diperoleh adalah terjadi peningkatan hasil belajar siswa dari siklus I ke siklus II. Pada siklus I ketuntasan belajar secara klasikal sebesar 73% berarti ada 27% siswa atau 10 siswa yang nilainya masih dibawah KKM. Hasil belajar siswa pada siklus II ketuntasan belajar klasikal sebesar 92% atau sebanyak 32 siswa mengalami peningkatan hasil belajar. Selain itu Aktivitas belajar siswa mengalami peningkatan dari siklus I ke siklus II. Pada siklus I aktivitas belajar sebesar 48% sedangkan pada siklus II aktivitas belajar mencapai sebesar 82%. Terjadi peningkatan pada kinerja guru yaitu siklus I sebesar 66% sedangkan pada siklus II adalah sebesar 90%. Kesimpulannya adalah terjadi peningkatan hasil belajar melalui media interactive video pada mata diklat memahami prinsip-prinsip penyelenggaraan administrasi perkantoran kelas X AP SMK Negeri 1 Batang. Avideointeractivemediadeliverysystem ofvideorecordingsof teaching wherethe materialis presentedwitha computercontrolto the audience(students whonot onlyhearandsee thevideoandsoundbutalsoprovideanactiveresponse. Understandingthe principlesof the administrationofficesarebeginningcompetencystudents are learningas it is aveinin theOfficeadministrative activities

  17. Valutazione del carico di stress nei Vigili del Fuoco: correlazione con il profilo psicologico ed alcuni indicatori biologici di rischio

    Directory of Open Access Journals (Sweden)

    P. Giacobazzi

    2003-05-01

    Full Text Available

    Obiettivo: approfondire i rapporti tra carico lavorativo, personalità ed alcuni indicatori biochimici di risposta allo stress le cui modificazioni possono contribuire a spiegare la suscettibilità/resistenza al rischio di malattie.

     Materiali e metodi: l’indagine è stata effettuata su un gruppo di Vigili del Fuoco (n°61 confrontati con un gruppo di controllo (ricercatori universitari; entrambi hanno aderito tramite consenso informato e fornito un campione di saliva per la misura del cortisolo e delle IgA in condizioni di base. Un sottogruppo di vigili ha fornito anche un campione di saliva dopo un turno lavorativo notturno (condizione di stress. Parallelamente si è effettuato un assessment psicologico tramite la somministrazione di questionari quali: lo State-Trait Anxiety Inventory, il Big Five Observer, il Locus of Control ed il Sensation Seeking Scale. Risultati: in condizioni basali i Vigili del Fuoco mostrano un livello di cortisolo salivare più elevato dei controlli (24,9 ± 11,3 vs 20,0 ± 8,6 nmol/l, p=0,091, mentre il livello di IgA è simile nei due gruppi. Nei vigili, dopo lo stress lavorativo, si è evidenziato un calo significativo delle IgA (296,5 ± 160,5 vs 191,9 ± 95,3 Bg/ml, p=0,014 ed una correlazione positiva tra il cortisolo salivare e l’ansietà di stato e di tratto.

    Conclusioni: i Vigili del Fuoco sono risultati meno ansiosi, più predisposti al rischio e con un profilo di personalità di tipo realistico in linea con la scelta professionale. Lo stress lavorativo si associa ad una riduzione significativa dell’ escrezione salivare di IgA, assunta come indice di attività del sistema immunitario, mentre il cortisolo salivare, che rappresenta un indicatore sensibile di attività neuroendocrina sotto stress, pur non modificandosi in termini assoluti si associa con il livello di ansietà dei vigili allo studio.

  18. Dai bisogni di salute al consumo di risorse sanitarie in provincia di Bergamo: profilo degli indicatori di bisogno, domanda, offerta

    Directory of Open Access Journals (Sweden)

    A. Zucchi

    2003-05-01

    Full Text Available

    Introduzione: la complessità interpretativa dei dati relativi ad alcuni fenomeni sanitari a livello territoriale impone la necessità di uno strumento semplice di lettura “epidemiologica”; tale lettura si fonda sull’utilizzo di una serie di “indicatori”, fondamenta di un processo dinamico di monitoraggio temporale e spaziale in grado di descrivere sinteticamente fenomeni di per sé complessi, al fine di fornire al decisore un supporto sintetico ma scientificamente solido.

    Obiettivi: istituzione di un sistema di monitoraggio sanitario community-based; definizione di indicatori sanitari comparabili tramite un esame critico dei dati esistenti; sviluppo di metodologie per la raccolta e la validazione dei dati; supporto alla creazione di un sistema efficace e affidabile di trasferimento e scambio dei dati e degli indicatori stessi con uso spinto della tecnologia telematica; elaborazione di metodi e di strumenti necessari alla produzione di analisi e relazioni.

    Materiali e metodi: gli indicatori analizzati fanno riferimento
    all’elenco definito dal decreto ministeriale n. 27 del 12 dicembre 2001 “sistema di garanzie per il monitoraggio dell’assistenza sanitaria”. A questo elenco ne sono stati aggiunti altri, per un totale di 127, divisi in grandi capitoli tematici: assistenza sanitaria, assistenza distrettuale, assistenza ospedaliera, indicatori stato di salute, consumo di risorse sanitarie (cui è stato dato particolare enfasi, indicatori di domanda/accessibilità. Per definire infine un
    profilo di sintesi di questi grandi capitoli e delle relative
    eterogeneità territoriali si è successivamente applicata la tecnica statistica dello “z-score”.
    Risultati: le differenze emerse a livello distrettuale hanno permesso di disegnare una ‘mappa’ degli indicatori sanitari in provincia di Bergamo.

    Conclusioni:i risultati di

  19. L'applicazione dei Sistemi Informativi Geografici per la valutazione dei bisogni di salute della popolazione pediatrica immigrata residente a Roma

    Directory of Open Access Journals (Sweden)

    A. G. De Belvis

    2003-05-01

    Full Text Available

    Obiettivi: lo studio applica i GIS per l’analisi dei bisogni di salute della popolazione immigrata in età pediatrica regolarmente residente a Roma e per la costruzione di bacini di utenza a livello di Municipio, ASL e Comune rispetto alle corrispondenti strutture di offerta.

    Materiali e Metodi: i dati sono stati acquisiti dall’Ufficio Statistica del Comune di Roma (popolazione in età 0-18 anni residente al 31/12/2002 per Municipio, Distretto e ASL. I dati relativi all’offerta dei servizi per l’infanzia delle ASL sono stati reperiti dalle ASL, dal Comune e dalla Caritas di Roma. I dati sono stati successivamente inseriti, verificati ed analizzati attraverso i programmi Excel e Stata7. L’utilizzo delle applicazioni GIS è stato realizzato attraverso il software Arc-View.

    Risultati: dei 169.064 immigrati presenti al 31/12/2002, quelli in età pediatrica (29.629 sono variabilmente distribuiti rispetto al totale degli immigrati e alla popolazione pediatrica residente.
    Ad esempio, la proporzione immigrati minori/immigrati varia da un minimo del 7,3% in Municipio I, ad un massimo del 20,1% nei Municipi VII e VII (Media: 13.26, I.C.95%: 11.46-15.05.
    L’analisi ha permesso di caratterizzare i bisogni socio-sanitari per Municipio, distretto e ASL. Una valutazione quantitativa della relazione bisogno/offerta è stata realizzata georeferenziando la popolazione immigrata in età pediatrica con le corrispondenti strutture di offerta censite.

    Conclusioni: l’utilizzo dei GIS in epidemiologia e sanità pubblica si presenta sempre più prezioso, per la capacità di sintetizzare, rappresentare efficacemente i fenomeni, suggerire ipotesi di correlazioni tra i fenomeni e indirizzare le decisioni in sanità.
    L’applicazione dei GIS sulla popolazione immigrata in età pediatrica – regolarmente residente a Roma - si è prestata in maniera efficace

  20. La leucemia del bambino come causa di disgregazione familiare

    Directory of Open Access Journals (Sweden)

    G. Varchetta

    2003-05-01

    Full Text Available

    Introduzione: le patologie del bambino, soprattutto se gravi e durature, possono essere definite come “malattie della famiglia” a causa dell’intensità di assistenza richiesta, delle difficoltà organizzative quotidiane e dello stress causato. Obiettivo: identificare il ruolo di alcuni potenziali fattori di rischio coinvolti nella rottura di famiglie di bambini leucemici.

    Materiali e metodi: mediante l’uso di questionari, sono state studiate, durante l’anno 2002, 150 cartelle cliniche di bambini leucemici dell’ospedale pediatrico “Santobono-Pausillipon”- Dipartimento di Oncologia; 11 casi sono stati esclusi per incompletezza dei dati. Outcome è stata considerata la “separazione familiare.” Sono state analizzate le seguenti variabili: trapianto di midollo osseo, lavoro del padre, della madre e loro età ed educazione, sesso ed età del bambino (CA, numerosità della famiglia, stato socio-economico, probabilità clinica di guarire (CPR, appartenenza ad una associazione. Sono state condotte analisi bivariate e logistiche. Risultati: all’analisi bivariata CA e CPR, entrambi stratificati in tre livelli, sono risultati associati alla separazione. L’Odds Ratio grezzo (OR della separazione familiare con CA di 5/10 anni e bambini di 11 anni o più a confronto con quelli d’età di 0/4 era, rispettivamente, di 8.68 (p=0.02 e di 5.7 (p=0.07. L’OR grezzo della separazione con un CPR medio e un CPR buono confrontato con un CPR basso ha dato rispettivamente 0.35 (p=0.02 e 0.08 (p‹0.001. Un modello logistico che includeva CPR come variabile principale e controllata per CA ha evidenziato che la probabilità di guarigione è media o alta e, dopo aver aggiustato per l’età del bambino, è stato ottenuto un rischio di rottura familiare rispettivamente di 0.29 (p=0.01 e 0.08 (p=0.02.

    Conclusioni: la rottura dell’unità familiare è evento frequente in caso di grave

  1. Indagine sulle conoscenze dei modelli di prevenzione delle epatiti A e B nell'ambito di inchieste epidemiologiche condotte per tali patologie

    Directory of Open Access Journals (Sweden)

    P. Giametta

    2003-05-01

    Full Text Available

    Obiettivi: rilevare le conoscenze sull’eziopatogenesi, sui modelli preventivi comportamentali e sulle offerte di vaccinoprofilassi delle Epatiti A e B.

    Materiali e Metodi: l’indagine è stata effettuata su pazienti affetti da Epatite A e B integrando la scheda di inchiesta epidemiologica con un apposito questionario strutturato in tre sezioni. Nella prima sezione del questionario è stata valutata la conoscenza sull’eziopatogenesi delle epatiti; nella seconda sezione è stato saggiato il grado di conoscenza sui modelli comportamentali e sulla pratica dell’immunoprofilassi; nella terza è stato indagato nello specifico il probabile meccanismo di trasmissione con riferimento anche alla mancata adozione di eventuali pratiche di prevenzione possibili ed adottabili.

    Il questionario è stato somministrato preliminarmente all’inchiesta epidemiologica.

    Risultati: sono stati valutati complessivamente 85 questionari, nel periodo Gennaio 2002-Marzo 2003. I casi di Epatite A affrontati sono stati 19, mentre i casi di Epatite B sono stati 66. Una percentuale elevata di soggetti (89% era a conoscenza dell’eziologia virale e delle principali modalità di trasmissione. Apprezzabile la percentuale di soggetti (78% che non ha attribuito all’Epatite A una
    trasmissione di tipo sessuale. La conoscenza dell’immunoprofilassi e delle offerte vaccinali condotte
    dai servizi territoriali è risultata essere piuttosto bassa (34%. Per i casi di Epatite B, la causa più frequentemente indicata quale elemento determinante il contagio è stata individuata nei rapporti occasionali non protetti (anche a rischio. Per i casi di Epatite A, è da rilevare la superficialità al consumo di alimenti a rischio (frutti di mare o pesce
    crudo soprattutto in occasione di viaggi all’estero.

    Conclusioni: i dati suggeriscono l

  2. Educazione all'igiene orale ed eradicazione della carie dentale nellíinfanzia. Risultati finali di uno studio in un campione di popolazione infantile di Ferrara

    Directory of Open Access Journals (Sweden)

    M. Bergamini

    2003-05-01

    Full Text Available

    Introduzione: poichè nel 1985 l’O.M.S. collocò l’eradicazione della carie infantile fra gli obiettivi epidemiologici da raggiungere nella regione europea entro l’anno 2000, è stato effettuato uno screening microbiologico finalizzato all’isolamento di germi cariogeni nel cavo orale dei bambini.

    Materiali e metodi: secondo le procedure correnti, sono stati eseguiti tamponi gengivo-coronali in 476 bambini delle scuole elementari e medie inferiori di Ferrara, cui è stato somministrato anche un questionario, mirato a conoscere il loro grado di informazione sull’igiene orale. Risultati: nel periodo Gennaio-Aprile 2000, sono stati esaminati 476 bambini suddivisi per sesso ed età [6-8 anni: 67 maschi, 98 femmine; 9-11: 53 maschi, 81 femmine; 12-14: 99 maschi, 78 femmine]. Sono stati isolati 119 ceppi di Rothia dentocariosa, con una preponderanza fra i maschi di 12-14 anni (n. 86; 86,8%. Dai questionari (476 consegnati; 399 compilati si evince che l’86,4% ritiene importante l’igiene orale, ma solo il 51,8% si lava i denti dopo ogni pasto ed appena il 22,3% esegue un controllo periodico dal dentista. Rothia dentocariosa è stata isolata nel 56,5% di coloro che si lavano i denti una volta al giorno e nel 75,9% di quelli che non li lavano.

    Conclusioni: considerando che Rothia dentocariosa non risulta essere un normale saprofita del cavo orale ma è probabilmente un germe opportunista in grado di promuovere attivamente le lesioni della carie iniziale, il suo isolamento può essere considerato un indice precoce di lesione cariogena in progressione. Ne deriva che, nonostante i notevoli progressi compiuti negli ultimi anni, paragonabili a quelli di nazioni ad alto tenore sociosanitario, l’obiettivo dell’eradicazione totale della carie dalla popolazione infantile ferrarese non è stato ancora raggiunto. Ciò principalmente a causa di un difetto di formazione culturale sia

  3. What we miss in order to be able to design and build a commercially viable fusion reactor

    Energy Technology Data Exchange (ETDEWEB)

    Andreani, R. [ENEA, Centro Ricerche Frascati, Rome (Italy). Dipt. Energia

    1999-07-01

    materiali capaci di resistere all'ambiente ostile del reattore a fusione per un suffciente numero di anni. Una sorgente intensa di neutroni e' necessaria per permettere gli sviluppi necessari.

  4. Scegliere la musica nell’era di Internet

    Directory of Open Access Journals (Sweden)

    Marco Russo

    2014-01-01

    Full Text Available La diffusione della musica su Internet è sorta solo dopo l’avvento di due specifiche tecnologie. La prima è relativa ai sistemi di compressione (soprattutto MP3 che ha permesso di ridurre le dimensioni di ciascun file, la seconda al progressivo ampliamento della banda disponibile agli utenti casalinghi (ADSL che ha drasticamente velocizzato i tempi di trasferimento dei dati. La nascita di Napster e dei successive sistemi peer to peer [Merriden 2001] ha reso infine la pratica di ricerca di brani musicali su Internet una prassi diffusa e stabilizzata [Mari 1999], tanto da soppiantare gran parte dei tradizionali media musicali ed ingenerare nuove forme di commercializzazione e gestione dei dati sonori [Prato 1995; Silva-Ramello 1999]. Senza entrare nel dettaglio legale dell’irruzione di Internet nella diffusione di materiali [Darias de las Heras 2003], aspetto che è tutt’altro dall’apparire chiaramente definito anche a causa di rapide trasformazioni normative locali rispetto ad un evento di dimensione assolutamente internazionale, certo è che le iniziali, e primitive, modalità di raccolta di brani su Internet si sono progressivamente evolute sino ad assumere rilevanti connotati tecnologici e commerciali [Di Carlo 2000] che rendono possibile individuare e effettuare il download di pressoché qualsiasi brano si desideri. Il rilievo principale che sorge da queste considerazioni impone dunque una nuova modalità di fruizione della musica rispetto a quella diffusa dai tradizionali media, poiché questi ultimi, al contrario di Internet, non permettono alcuna interazione ed è quindi essenzialmente passiva. Con l’avvento di Internet e tutti i suoi corollari il problema del fruitore di musica cambia profondamente, spostando l’attenzione principalmente verso quello della “scelta” della musica, indipendentemente, spesso, dall’uso che se ne potrà fare o delle modalità di ascolto che saranno messe in atto. Con questo intervento

  5. Power deposition distribution in liquid lead cooled fission reactors and effects on the reactor thermal behaviour; Distribuzione di potenza nei reattori a fusione refrigerante ed effetti sul comportamento del reattore termale

    Energy Technology Data Exchange (ETDEWEB)

    Cevolani, S.; Nava, E.; Burn, K.W. [ENEA, Divisione Sistemi Energetici Ecosostenibili, Centro Ricerche Ezio Clementel, Bologna (Italy)

    2001-07-01

    In the framework of an ADS study (Accelerator Driven System, a reactor cooled by a lead bismuth alloy) the distribution of the deposited energy between the fuel, coolant and structural materials was evaluated by means of Monte Carlo calculations. The energy deposition in the coolant turned out to be about four percent of the total deposited energy. In order to study this effect, further calculations were performed on water and sodium cooled reactors. Such an analysis showed, for both coolant materials, a much lower heat deposition, about one percent. Based on such results, a thermohydraulic analysis was performed in order to verify the effect of this phenomenon on the fuel assembly temperature distribution. The main effect of a significant fraction of energy deposition in the coolant is concerned with the decrease of the fuel pellet temperature. As a consequence, taking into account this effect allows to increase the possibilities of optimization at the disposal of the designer. [Italian] Nell'ambito dello studio di un ADS (Accelerator Driven System, un reattore refrigerato per mezzo di una lega di piombo-bismuto) per mezzo di calcoli Monte Carlo sono stati valutati i contributi di deposizione di potenza nei materiali fissile, strutturale e refrigerante, ottenendo che il contributo della potenza depositata nel refrigerante e' pari al quattro per cento circa del totale. Allo scopo di meglio approfondire questo effetto, sono stati effettuati ulteriori calcoli in relazione a reattori refrigeranti ad acqua e sodio; i risultati mostrano come, in questi casi, la deposizione di potenza nel refrigerante sia decisamente inferiore dell'ordine di un per cento circa. Sulla base di tali risultati, e' stata avviata un'analisi di caratterre termoidraulico avente lo scopo di verificare l'effetto di questo fenomeno sulla distribuzione di temperatura negli elementi di combustibile. L'effetto principale di una sensibile frazione di energia

  6. Cateterismo vescicale: appropriatezza dell´uso ed esiti clinici nell´Azienda Sanitaria Ospedaliera "Maggiore della Caritá" di Novara

    Directory of Open Access Journals (Sweden)

    M. Luparia

    2003-05-01

    Full Text Available

    Obiettivi: valutare le relazioni intercorrenti tra i livelli di appropriatezza di indicazione e di gestione del cateterismo vescicale e lo sviluppo delle IVU.

    Materiali e metodi: studio descrittivo condotto in una giornata con rilevazione basata su cartelle cliniche ed infermieristiche. Le relazioni intercorrenti tra la cateterizzazione vescicale e l’insorgenza dell’IVU sono stati studiati mediante modelli di regressione logistica in grado di valutare l’appropriatezza del processo assistenziale e per identificare i determinanti dell’esitto. Risultati: nel giorno dell’indagine son risultati ricoverati 166 pazienti, di questi 57 (34,34%; IC 95% 28,06- 40,62% erano portatori di catetere urinario. In totale sono state analizzate oltre 1200 procedure. La prevalenza di infezioni nosocomiali delle vie urinarie è stata del 12,28% (IC 95% 7,98-16,50%. Tutti i cateterizzati avevano un sistema di drenaggio di tipo chiuso. I modelli di regressione logistica hanno dimostrato un accresciuto rischio di mancato lavaggio delle mani in presenza di un regime di ricovero d’urgenza e in unità operativa chirurgica (p‹0,01, parimenti si è evidenziato un minor livello di controllo del meato urnario in presenza del regime del ricovero d’urgenza in unità operativa chirurgica (p‹0,01.

    Conclusioni: le raccomandazioni fornite dalla letteratura in relazione all’inserimento e alla gestione del cateterismo vescicale sono solo in parte seguite nella pratica quotidiana. In particolare il lavaggio delle mani, anche se è una procedura semplice e poco costosa risulta comunque poco seguita, soprattutto in regime di urgenze e nelle chirurgie, dove per la tipologia delle prestazioni effettuata, l’aderenza a queste procedure dovrebbe essere massima. Questi comportamenti “scorretti” rendono inefficace l’utilizzo del cateterismo vescicale a ciclo chiuso. Nonostante queste problematicità la

  7. Sieropositivitá per HIV, HBV e HCV negli utenti del Servizio di Tossicodipendenza di Formia (ASL di Latina

    Directory of Open Access Journals (Sweden)

    G. La Torre

    2003-05-01

    Full Text Available

    Obiettivi: valutare la prevalenza sieropositività per HIV, HBV e HCV nei tossicodipendenti afferenti al Ser.T di Formia (LT.

    Materiali e metodi: sono state consultate le cartelle cliniche degli afferenti al Ser.T. nel 2002, estraendo dati relativi ai parametri socio-demografici ed alle sieropositività. L’analisi statistica ha previsto l’impiego del test del χ2 e della regressione logistica multipla.

    Risultati: sono stati presi in considerazione 135 tossicodipendenti, di cui 103 (76.3% maschi e 32 (23.7% femmine. L’età mediana dell’inizio della tossicodipendenza e della presa in carico presso il servizio erano, rispettivamente, di 18 e di 23 anni. Il 94.1% dei tossicodipendenti risulta dipendente primariamente da eroina, il 5.2% da cocaina e lo 0.7% da alcol. Relativamente alle positività per i virus considerati, 7 soggetti (5.2% sono risultati positivi all’HIV, 23 (17% sieropositivi per HBV e 50 (37% sieropositivi per HCV. L’analisi multivariata mostra che sono associate alla sieropositività per HCV la sieropositività per HBV (OR = 3.87 e l’età della presa in carico presso il servizio superiore a 25 anni (OR = 1.88; alla sieropositività per HBV l’occupazione saltuaria (OR = 4.58, la HCV positività (OR = 4.41 e la HIV positività (OR = 5.39; alla sieropositività per HIV l’età della presa in carico presso il servizio superiore a 25 anni (OR = 4.94.

    Discussione: l’indagine ha messo in evidenza prevalenze di sieropositività per HCV, HBV e HIV decisamente inferiori a quelle registrate in altre realtà italiane ed internazionali. Una possibile spiegazione potrebbe essere ricercata nei bassi livelli di sieropositività per questi virus nella popolazione generale del Basso Lazio, o nella scarsa abitudine di scambiarsi le siringhe fra tossicodipendenti di questa area geografica.

  8. Standardizzazione isogravitá di un case-mix ospedaliero mediante Charlson index

    Directory of Open Access Journals (Sweden)

    G. Messina

    2003-05-01

    Full Text Available

    Introduzione: la comorbidità è un importante fattore confondente negli studi epidemiologici valutativi dell’assistenza ospedaliera. Diversi strumenti di risk adjustment misurano la complessità della malattia, consentendo di correlarla al consumo di risorse assistenziali, agli esiti, nonchè di confrontare studi eseguiti in tempi e realtà diversi.

    Obiettivi: - Standardizzare per complessità casistica la mortalità dei pazienti assistiti da un grande ospedale; - Identificare le variabili in grado di migliorare la capacità predittiva di mortalità intraospedaliera (IM. Materiali e

    Metodi: sono state analizzate 40.801 schede di dimissione prodotte dal Policlinico Senese nel 2001. Sono stati studiati i tassi di IM specifici per Charlson Index Score (CSI: quest’ultimo considera 19 categorie di patologia e si basa sull’ ICD-IX-CM. Le variabili studiate mediante analisi bivariate e regressione logistica, sono state: CSI (codificato in 5 livelli 0, 1, 2, 3, 4, lunghezza del ricovero (LR, sesso ed età. Risultati: CSI è risultato associato con IM (p‹0.001. Sesso, età e LR sono risultati associati sia con CSI (p‹0.001 che IM (p‹0.001. Confrontando i 4 livelli di CSI con quello di riferimento (0, le seguenti Odds Ratio (OR di IM sono state trovate: Livello 1 verso livello 0 OR: 6.79 (p‹0.001, Livello 2 verso livello 0 OR: 15.8 (p‹0.001, Livello 3 verso livello 0 OR: 9.36 (p‹0.001, Livello 4 verso livello 0 OR: 7.4 (p‹0.001. La variabile sesso non è risultata aver un effetto confondente tra CSI e IM al contrario delle variabili LR ed età.

    Conclusioni: il CSI aiuta a valutare (predire il rischio di mortalità intraospedaliera, sebbene in modo non lineare. Abbiamo sempre rilevato valori più alti di mortalità confrontando i livelli 1, 2, 3, e 4 con quello di riferimento (0. In particolare il valore più alto lo ha raggiunto il secondo livello

  9. La costruzione di edifici in muratura di pietra: aspetti sinergici tra prevenzione sismica, prestazioni acustiche ed energetiche - The construction of stone masonry buildings: synergy aspects between seismic safety, acoustic and energy performances

    Directory of Open Access Journals (Sweden)

    Alessandro Schiavi

    2018-02-01

    Full Text Available Le murature portanti realizzate con materiali lapidei naturali possono costituire una risorsa per la ricostruzione di aree devastate da eventi sismici nella misura in cui si chieda di recuperare,oltre ad una maggiore sicurezza antisismica, anche un’identità storico-tipologica e tecnologica del tessuto urbano, unitamente alla possibilità di rilanciare le attività edilizie artigianali delle economie locali, altrimenti tagliate fuori dal processo di ricostruzione spesso basato sull’importazione di tecniche costruttive avulse dal contesto in cui si affermano.Se da un lato l’emergenza impone l’uso di sistemi costruttivi a secco solitamente basati su legno e acciaio, che consentono in tempi rapidi di dare ricovero a persone e cose, appare tuttavia evidente chequeste, unitamente al cemento armato,non possono essere imposte come la soluzione valida ovunque e comunque per la ricostruzione di antichi borghi completamente distrutti,dei quali deve essere tramandata la memoria storica anche in base alle recenti direttive ministeriali. Nella memoria si indagano sinteticamente le tecnologie costruttive in muratura ammesse dalle normative antisismiche, alla luce del fatto chele stesse offrono interessanti prestazioni acustiche ed energetiche, grazie all’elevata massa ed inerzia termica, aspetti anch’essi oggetto di specifiche normative cogenti. --- Natural stone masonry is a fundamental resource for buildings reconstruction or renovation in areas devastated by seismic events, in order to recover the historical-typological identity of Central Italy urban landscape. As a matter of facts, this kind of building material,united with the new seismic safety technologies, allows to relaunch local handcrafts, otherwise cut off from the reconstruction process based on foreign constructive techniques. Whereas, on the one hand, emergency requires the use of wood and steel building systems or reinforced concrete, allowing rapid provision of shelter to people

  10. LIPSI. IL LESSICO DI FREQUENZA DELL’ITALIANO PARLATO IN SVIZZERA

    Directory of Open Access Journals (Sweden)

    Massimo Prada

    2010-09-01

    Full Text Available L'articolo illustra le caratteristiche del LIPSI, il lessico di frequenza dell'italiano parlato in Svizzera.  Il LIPSI, elaborato con metodi di linguistica computazionale sulla base di  materiali linguistici raccolti sul campo, è il risultato di una ricerca durata quattro anni realizzata nell'ambito dei progetti dell' OLSI (Osservatorio linguistico della Svizzera italiana, istituito per la promozione della lingua e della cultura del Cantone Ticino.  Il LIPSI non solo fornisce la lista di frequenza di circa 13.000 parole dell'italiano parlato nel Cantone Ticino e nelle Valli Grigioni italiane, ma la confronta con quella del LIP e di altri strumenti di statistica linguistica  apparsi in Italia, e approfondisce alcuni aspetti che chiariscono meglio i contorni dell'italiano "statale" svizzero. Tale denominazione  si fonda su ragioni di natura sia geografica-politica-amministrativa sia interne alla varietà e propone una considerazione dell'italiano come una lingua pluricentrica, una lingua cioè che presenta accanto al tradizionale centro metropolitano italiano, imperniato sul modello fiorentino assorbito nella lingua letteraria con apporti di altre varietà, un altro centro almeno parzialmente autonomo di irradiazione e di sviluppo, quello della Svizzera italiana. Il LIPSI si configura inoltre come strumento metodologico importante per la ricerca e la didattica nell'ambito dell'italiano L1/L2.   This article illustrates the characteristics of LIPSI, the frequency lexicon of Italian spoken in Switzerland. LIPSI was compiled using computational linguistics methods based on materials collected in the field. It is the result of a four-year study carried out as part of OLSI (Osservatorio linguistico della Svizzera italiana, an institution which promotes the language and culture of Canton Ticino. LIPSI not only supplies a frequency list of about 13,000 Italian words spoken in Canton Ticino and the Italian Grigioni Valley, but it also compares this

  11. Contact sponge water absorption test implemented for in situ measures

    Science.gov (United States)

    Gaggero, Laura; Scrivano, Simona

    2016-04-01

    implemented measurements gave the possibility of a direct comparison with the capillary water absorption method. Pardini C. & Tiano P. 2004. Valutazione in situ dei trattamenti protettivi per il materiale lapideo, proposta di una nuova semplice metodologia. ARKOS, 5, 30-36. UNI 11432. 2011. Beni culturali Materiali lapidei naturali ed artificiali - Misura della capacita di assorbimento di acqua mediante spugna di contatto. P. 6.

  12. Il Gambling Compulsivo: rilevanza epidemiologica

    Directory of Open Access Journals (Sweden)

    A. Coacci

    2003-05-01

    Full Text Available

    Introduzione: il gioco d’azzardo ha profonde radici nella storia e nella cultura di ogni popolo. Si stima che circa l’80% della popolazione adulta nel nostro Paese giochi d’azzardo. Esso, pur rappresentando per la maggior parte di queste persone solo un innocuo passatempo, si trasforma talora in una vera e propria malattia (gambling compulsivo, con comportamenti che denotano forme estreme di rischio, sino a forme che portano alla distruzione della famiglia e persino della propria vita.

    Si tratta un disturbo poco conosciuto e spesso non diagnosticato. Infatti, benché sia largamente diffuso e comporti rilevanti costi umani e sociali, il gambling compulsivo solo di recente è stato incluso nelle classificazioni diagnostiche internazionali.

    Obiettivi: valutare l’impatto epidemiologico del gambling compulsivo (gioco d’azzardo patologico in una ASL/provincia.

    Materiali e metodi: è stato inviato un questionario ai 190 Medici di Medicina Generale della provincia di Grosseto (ASL 8, per raccogliere informazioni su: sistema di cura, numero di soggetti che si sono rivolti al proprio medico di famiglia per tale problema, eventuale coesistenza di problemi e comportamenti di dipendenza e di abuso (alcool, psicofarmaci, droghe illegali, ecc.

    Risultati: sono pervenuti 127 (pari al 66,8% questionari compilati. L’elaborazione dei dati è tuttora in corso.

    Conclusioni: dai risultati preliminari sembra emergere che il numero di persone che chiede aiuto al medico e al SSN, differentemente da quanto accade per i tossicodipendenti, è molto limitato e, quindi, intuitivamente poco indicativo della massa di soggetti realmente coinvolti dalla problematica studiata. Si discute del ruolo nella promozione della salute potenzialmente svolto dai Medici di Medicina Generale. Per quanto la tecnica di rilevazione appaia relativamente poco sensibile

  13. Lo screening auxologico: un'indagine necessaria per la prevenzione dell'obesitá in etá scolare

    Directory of Open Access Journals (Sweden)

    R. La Licata

    2003-05-01

    Full Text Available

    Obiettivi: l’interesse suscitato dall’obesità in età scolare è in continuo aumento, sia a causa della prevalenza sempre più estesa di tale patologia in questa età, sia perché il bambino vive con ansia e ostilità questo suo stato divenendo spesso oggetto di derisione da parte del gruppo. In un progetto di educazione alimentare che potesse avere un’azione di prevenzione primaria nei riguardi dell’obesità in età evolutiva; il nostro obiettivo è stato quello di effettuare uno screening prima di iniziare l’intervento su una porzione di popolazione scolastica per valutare lo stato auxologico dei soggetti e saggiare le loro conoscenze sulla nutrizione e sulle abitudini alimentari. Abbiamo ritenuto che ormai sia assolutamente necessario ricavare queste informazioni per poi programmare interventi efficaci ed efficienti per migliorare la qualità di ogni programma di educazione alimentare.

    Materiali e metodi: l’indagine condotta in tre scuole elementari di Palermo ha coinvolto per ogni scuola due terze, due quarte, due quinte per un totale di 360 bambini con un’età compresa tra i 7 e gli 11 anni. Per la valutazione auxologica sono stati presi in considerazione statura, peso ed età cronologica secondo il metodo di J.M. Tanner. Il rilevamento delle abitudini alimentari e stili di vita è stato effettuato per mezzo di un questionario a risposta multipla.

    Risultati: dai risultati di questa indagine preliminare è emerso che la prevalenza dell’obesità in età evolutiva nella nostra popolazione si avvicina notevolmente a quella italiana che è del 19%. Lo stile di vita sedentario aggrava la già precaria situazione dovuta alla cattiva alimentazione.

    Conclusioni: dalle considerazioni fatte appare evidente quanto sia necessario e urgente un intervento efficiente di educazione alimentare che non resti sporadico e privo di una metodologia ben

  14. Utilizzo della metodologia di progettazione secondo ISO 9001:2000 per il re-engineering dei ricoveri chirurgici in degenza breve

    Directory of Open Access Journals (Sweden)

    G. Tarassi

    2003-05-01

    Full Text Available

    Obiettivi: migliorare l’assistenza al paziente, riducendo
    il periodo della degenza nella fase immediatamente
    postoperatoria; ridurre l’inappropriatezza di ricoveri in particolare inseriti nella lista del decreto sui LEA; utilizzare con maggior efficienza i posti letto e le risorse infermieristiche; avviare la organizzazione dell’attività per processi all’interno del Sistema qualità ISO 9001:2000.


    Materiali e metodi: la riorganizzazione ha interessato
    tutte le 6 unità operative di area chirurgica (chirurgia generale, chirurgia plastica, urologia, oculistica, ortopedia, ginecologia i servizi di prenotazione ed accettazione ricoveri, l’ambulatorio degli accertamenti preoperatori per un’area polidisciplinare di degenza breve da lunedì a venerdì con patologie chirurgiche con degenza media tra 0 e 4 giorni. Definiti i membri del gruppo di progetto, è
    stato stilato un calendario comprensivo di 2 riesami, 2 verifiche ed 1 validazione, secondo la metodologia ISO. È stato inoltre realizzato uno studio preliminare effettuato in collaborazione con tre ospedali.

    Risultati: risparmio di giornate di degenza a parità di case-mix; risparmio risorse infermieristiche a parità di assistenza; effettuazione DRG chirurgici a rischio di inappropriatezza in Day Surgery o One Day Surgery; verifica di un buon livello di customer satisfation; articolazione di unica segreteria per l’intero processo da prenotazione, accertamenti preoperatori, ricovero, intervento, dimissione, controlli con unico riferimento per il paziente con buon gradimento complessivo; costruzione di percorsi diagnostico-terapeutici
    condivisi tra diverse.

    Conclusioni: il progetto ha permesso di utilizzare in modo più efficiente posti letto e di organizzare per processi l’attività assistenziale con soddisfazione dell’utenza esterna e

  15. Low-power laser irradiation improves histomorphometrical parameters and bone matrix organization during tibia wound healing in rats.

    Science.gov (United States)

    Garavello-Freitas, I; Baranauskas, V; Joazeiro, P P; Padovani, C R; Dal Pai-Silva, M; da Cruz-Höfling, Maria Alice

    2003-01-01

    The influence of daily energy doses of 0.03, 0.3 and 0.9 J of He-Ne laser irradiation on the repair of surgically produced tibia damage was investigated in Wistar rats. Laser treatment was initiated 24 h after the trauma and continued daily for 7 or 14 days in two groups of nine rats (n=3 per laser dose and period). Two control groups (n=9 each) with injured tibiae were used. The course of healing was monitored using morphometrical analysis of the trabecular area. The organization of collagen fibers in the bone matrix and the histology of the tissue were evaluated using Picrosirius-polarization method and Masson's trichrome. After 7 days, there was a significant increase in the area of neoformed trabeculae in tibiae irradiated with 0.3 and 0.9 J compared to the controls. At a daily dose of 0.9 J (15 min of irradiation per day) the 7-day group showed a significant increase in trabecular bone growth compared to the 14-day group. However, the laser irradiation at the daily dose of 0.3 J produced no significant decrease in the trabecular area of the 14-day group compared to the 7-day group, but there was significant increase in the trabecular area of the 15-day controls compared to the 8-day controls. Irradiation increased the number of hypertrophic osteoclasts compared to non-irradiated injured tibiae (controls) on days 8 and 15. The Picrosirius-polarization method revealed bands of parallel collagen fibers (parallel-fibered bone) at the repair site of 14-day-irradiated tibiae, regardless of the dose. This organization improved when compared to 7-day-irradiated tibiae and control tibiae. These results show that low-level laser therapy stimulated the growth of the trabecular area and the concomitant invasion of osteoclasts during the first week, and hastened the organization of matrix collagen (parallel alignment of the fibers) in a second phase not seen in control, non-irradiated tibiae at the same period. The active osteoclasts that invaded the regenerating site were

  16. High fluence deposition of polyethylene glycol films at 1064 nm by matrix assisted pulsed laser evaporation (MAPLE)

    DEFF Research Database (Denmark)

    Purice, Andreea; Schou, Jørgen; Kingshott, P.

    2007-01-01

    Matrix assisted pulsed laser evaporation (MAPLE) has been applied for deposition of thin polyethylene glycol (PEG) films with infrared laser light at 1064 nm. We have irradiated frozen targets (of 1 wt.% PEG dissolved in water) and measured the deposition rate in situ with a quartz crystal 2...... microbalance. The laser fluence needed to produce PEG films turned out to be unexpectedly high with a threshold of 9 J/cm(2) and the deposition rate was much lower than that with laser light at 355 nm. Results from matrix assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI......-TOF-MS) analysis demonstrate that the chemistry, molecular weight and polydispersity of the PEG films were identical to the starting material. Studies of the film surface with scanning electron microscopy (SEM) indicate that the Si-substrate is covered by a relatively homogenous PEG film with few bare spots. (c...

  17. Portable monitors for measuring radon and its progenies air by intergrated sampling method

    International Nuclear Information System (INIS)

    Zhang Huaiqin; Su Jingling; Yao Wanyuan; Liu Jinhua

    1989-01-01

    Two kinds of portable monitors have been developed, which can be used to measure the concentration of radon or potential energy concentration of radon or potential energy concentration of radon progenies in air. The thermoluminescent material CaSO 4 (Tm) is used as a detecting element for both of them. The lowest detectable limit of the passive radon monitor is about 1.5 Bq/m 3 for radon in air, as the exposure time being one week. Its main advantages are high reliability and convenient manipulation. The working level monitor for radon progenies in air consists of a mini membrane pump and an integrating probe. The lowest detectable limit is about 6.2 x 10 -9 J/m 3 , as the sampling time being 6 hours. It weights only about 0.35 kg

  18. Comparisons of selected frame constructions considering effects of rock bursts and earthquakes. [Poland

    Energy Technology Data Exchange (ETDEWEB)

    Trojan, Z.; Lipski, Z.; Raczek, R.

    1985-01-01

    Methods for assessing apartment buildings with frames made of reinforced concrete or steel elements situated above coal mines in Upper Silesia are analyzed. Six buildings from 13.5 m to 37.8 m high are analyzed. Methods for design of earthquake-resistant buildings and buildings constructed in areas affected by underground coal mining are compared. Safety standards used in Israel, the FRG, the USSR, Czechoslovakia and Australia are compared to standards used in Poland for buildings in areas affected by underground mining in Upper Silesia. Loads on a building frame during a shock (caused by mining) with an energy of 10/sup 9/ J are analyzed. Force of inertia and bending moment in the building frame is calculated. Investigation results are shown in 3 tables and in a diagram. Recommendations for methods of calculating bending moment in frames of buildings affected by shocks caused by underground coal mining are made. 11 references.

  19. Channel catfish response to ultraviolet-B radiation

    Science.gov (United States)

    Ewing, M.S.; Blazer, V.S.; Fabacher, D.L.; Little, E.E.; Kocan, K.M.

    1999-01-01

    Fingerling channel catfish Ictalurus punctatus exposed to simulated ultraviolet-B radiation at an average daily dose of 2.9 J/cm2 were quite sensitive to the radiation. After a 24-h exposure, thinning of the most dorsal epidermis frequently was accompanied by edema. Compared with epidermis of unexposed fish, mucous cells in exposed fish were less superficial and club cells were less numerous both dorsally and high on the lateral surface of the body. Sunburn cells with pyknotic nuclei were evident in the epidermis of exposed fish. Among fish exposed for 48 h, focal necrosis and sloughing of the outer epidermal layer were widespread. A methanol-extractable skin substance that is associated with resistance to sunburn in other fish species was not detected in channel catfish.

  20. KWIK Smoke Obscuration Model: User’s Guide.

    Science.gov (United States)

    1982-09-01

    t ’ustr ( td I IK,j) 384: prt 3o :: pr t 6 k AC 1-4G" 36~b : pr t " ~ L 3b7: if j~i;prt &t(t1,] 3 8 8: it J=2;pr. "&str(Zjl,1,KI) 3 0 9: j~r t "I 39u...t.2~t71. * j3 3 2u: w r t 7uX ,"i(Lz~j i21iJ "c3wt70, )i: lnt 4 5X, "irI I U uIL - = 01 17.2;wrt 701,kq3 j~b: Lirt. 45x,"a..~c4 uAT - LiLY = g,t4.2

  1. Specific heat measurements of TiB2 and 6LiF from 0.5 to 30 K

    International Nuclear Information System (INIS)

    Lang, Brian E.; Donaldson, Marcus H.; Woodfield, Brian F.; Burger, Arnold; Roy, Utupal N.; Lamberti, Vincent; Bell, Zane W.

    2005-01-01

    The specific heats of TiB 2 and 6 LiF have been measured from 0.5 to 30 K as part of a larger project in the construction of a neutron spectrometer. For this application, the measured specific heats were used to extrapolate the specific heats down to 0.1 K with lattice, electronic, and Schottky equations for the respective samples. The resultant specific heat values at 0.1 K for TiB 2 and 6 LiF are 4.08 x 10 -4 ± 0.27 x 10 -4 J/K/mol and 9.19 x 10 -9 ± 0.15 x 10 -9 J/K/mol, respectively

  2. Gateway to Care Management Analysis Series. Department of Army Health Services Command, Champus Catastrophic Payments for First Quarter, Fiscal Year 1993. Gateway Catchment Areas

    Science.gov (United States)

    1993-02-26

    CDU *~ IA C, Mt ac ca~ ;-§ = WEBS ~ 2WW -J OWO W W w U .41w 991o 2. Z 9. .J4NUIW fu -W gW atZ W ~~4 uu U~jW * WO W~I WI u at N. 0 0 W W 43I M c MCW4 - IA...t Z --w A -~ 4 -ti LUW C- o.nfl$I-V Pd . - K ~~~s- 5o. In U N U, I.-W cB w o S. -.-Bg a U I N N E % J N*B 0 u ra wz -It- ! - %n .~ *4- De IW. WIx -C

  3. Very large scale characterization of graphene mechanical devices using a colorimetry technique.

    Science.gov (United States)

    Cartamil-Bueno, Santiago Jose; Centeno, Alba; Zurutuza, Amaia; Steeneken, Peter Gerard; van der Zant, Herre Sjoerd Jan; Houri, Samer

    2017-06-08

    We use a scalable optical technique to characterize more than 21 000 circular nanomechanical devices made of suspended single- and double-layer graphene on cavities with different diameters (D) and depths (g). To maximize the contrast between suspended and broken membranes we used a model for selecting the optimal color filter. The method enables parallel and automatized image processing for yield statistics. We find the survival probability to be correlated with a structural mechanics scaling parameter given by D 4 /g 3 . Moreover, we extract a median adhesion energy of Γ = 0.9 J m -2 between the membrane and the native SiO 2 at the bottom of the cavities.

  4. Meiotic behavior of wild Caricaceae species potentially suitable for papaya improvement

    Directory of Open Access Journals (Sweden)

    Emanuelli Narducci da Silva

    2012-01-01

    Full Text Available The purpose of this study was to evaluate the meiotic behavior and determine the meiotic index and pollen viability of representative plants of the wild species V. goudotiana, V. quercifolia and J. spinosa. Meiotic analysis confirmed that the species are diploid and have 18 chromosomes. Meiosis was partially normal, since some abnormalities, e.g, sticky and lagging chromosomes, precocious segregation, lack of synchrony, and disturbances in the spindle fibers were observed. These abnormalities resulted in post-meiotic products (monads, dyads, triads, and polyads that probably contributed to the meiotic index of 85.7 % (V. goudotiana to 95.9 % (J. spinosa; significant variation was observed in the species V. goudotiana. The pollen viability of 68.0% (V. goudotiana to 96.0 % (J. spinosa was reasonably good in these wild species. Crossings in breeding programs involving V. goudotiana should therefore be carefully planned, since part of the gametes of this species is unviable.

  5. Analysis of the radiative decay J/ψ → γωω at BESIII

    Energy Technology Data Exchange (ETDEWEB)

    Albrecht, Malte [Institut fuer Experimentalphysik I, Ruhr-Universitaet Bochum (Germany)

    2015-07-01

    Gluonic bound states like glueballs or hybrids are predicted to be copiously produced in the radiative decays of J/ψ. Especially the radiative decays into two vector mesons, J/ψ → γVV, have been intensively studied, since pseudoscalar (0{sup -}) enhancements have been observed in the ρρ, φφ and ωω final states with low statistics in the past. In this talk we show preliminary results of the analysis of the radiative decay J/ψ → γωω, using the world's largest data sample of ∼ 1.2.10{sup 9} J/ψ events collected with the Beijing Spectrometer III (BESIII) at the Beijing Electron-Positron Collider (BEPCII). The data selection, background analysis and preliminary results of a mass-independent partial wave analysis of the selected sample are presented.

  6. Laser damage studies on MgF2 thin films

    International Nuclear Information System (INIS)

    Protopapa, Maria Lucia; De Tomasi, Ferdinando; Perrone, Maria Rita; Piegari, Angela; Masetti, Enrico; Ristau, Detlev; Quesnel, Etienne; Duparre, Angela

    2001-01-01

    The results of laser damage studies performed at 248 nm (KrF excimer laser) on MgF 2 thin films deposited by different techniques (electron-beam evaporation, thermal boat evaporation, and ion-beam sputtering) on fused silica and CaF 2 substrates are presented. We find that the films deposited on CaF 2 substrates by the electron-beam evaporation technique present the highest damage threshold fluence (9 J/cm2). The photoacoustic (PA) beam deflection technique was employed, in addition to microscopical inspection, to determine laser damage fluences. We confirm, by scanning electron microscopy analysis of the damaged spots, the capability of the PA technique to provide information on the mechanisms leading to damage. The dependence of both laser damage fluence and damage morphology on the film deposition technique, as well as on the film substrate, is discussed

  7. Study on the resistance of haloferax radiotolerans, an extreme Halophilic archaebacterium from Uromia lake against ultraviolet (UV) light and 60Co gamma-rays

    International Nuclear Information System (INIS)

    Asgarni, E.; Shirzad, M.; Soudi, M. R.; Shahmohammadi, H. R.; Falsafi, T.

    2006-01-01

    In this work, the capacity of an extreme halophilic archaebacterium, isolated from Uromia lake, Haloferax radiotolerans to withstand the lethal effects of ultraviolet light (UV),and 60 Co r-rays has been studied. The resistibility of this organism against the DNA-damaging agents was evaluated by calculating of the survival fractions at different dose rates of W and 60 Co r-rays radiations and compared with those of Escherichia coli B/r (a radioresistant strain of E. coli). D 37 values for Haloferax radiotolerans and E. coli B/r were 23 1, and 9 J/m 2 , respectively, by exposure to the UV light. They were 645, and 99 Gy, respectively, by exposure to 60 Co r-rays. Against these agents, Haloferax radiotolerans shows much more resistance compare to that of E. coli B/r. This is categorized as the first report of resistibility in the member of Archaea

  8. Studies of Solar Flares and Coronal Loops.

    Science.gov (United States)

    1984-07-10

    i( Tipo + T pl) and equations (5) and (8), we get P (D - w t P = + 0 (9j where 0 = o ’-, +T (k" -B,)- (o fTQ 10R B0 . G!) = ( - 1 ) R p + T ( k...andStegun. 1 . eds. 1970. HandhoolMathemarical Davis. J. M., and Webb. D F 1981. Bull • 4.4S. 13. -21 F!,n,; .ns INew York Do’er). p. 17 Einaudi. G...Sakanaka. P H 19-4. Ph s fIhids. 17, SIX 1951. Proc Ros Sit London. 1. 244. 17. Harsey. K. L. 1981. Bull . 44S. 13. ,90 tiider. C. Einaudi. G. and

  9. Pengembangan Tungku Gasifikasi Arang Biomassa Tipe Natural Draft Gasification Berdasarkan Analisis Computational Fluid Dynamics (CFD

    Directory of Open Access Journals (Sweden)

    Erlanda Augupta Pane

    2014-10-01

    Full Text Available A biomass stove based on natural draft gasification (NDG has been developed in a previous study (Nelwa, et al. 2013 by using simulation based on heat transfer and equilibrium modeling. In this study, a CFD simulation was performed in order to analyze the effect of chimney height, and inlet hole diameter of the stove to the performance of the stove. The results of simulation showed that power produced by stove was between 1863.9 J/s until 2585.7 J/s, and its gasification efficiency was 67.11%. The results of simulation also showed that charcoal gasification produces combustible gases (CO, CH4, and H2 at the bottom and the center of stove, and then they were oxidized by secondary air at the top of stove. This oxidation reaction produces sufficient heat energy which can be used for cooking process.

  10. Exact computation and large angular momentum asymptotics of 3nj symbols: Semiclassical disentangling of spin networks

    International Nuclear Information System (INIS)

    Anderson, Roger W.; Aquilanti, Vincenzo; Silva Ferreira, Cristiane da

    2008-01-01

    Spin networks, namely, the 3nj symbols of quantum angular momentum theory and their generalizations to groups other than SU(2) and to quantum groups, permeate many areas of pure and applied science. The issues of their computation and characterization for large values of their entries are a challenge for diverse fields, such as spectroscopy and quantum chemistry, molecular and condensed matter physics, quantum computing, and the geometry of space time. Here we record progress both in their efficient calculation and in the study of the large j asymptotics. For the 9j symbol, a prototypical entangled network, we present and extensively check numerically formulas that illustrate the passage to the semiclassical limit, manifesting both the occurrence of disentangling and the discrete-continuum transition.

  11. Asymptotics of Wigner 3nj-symbols with small and large angular momenta: an elementary method

    International Nuclear Information System (INIS)

    Bonzom, Valentin; Fleury, Pierre

    2012-01-01

    Yu and Littlejohn recently studied in (2011 Phys. Rev. A 83 052114 (arXiv:1104.1499)) some asymptotics of Wigner symbols with some small and large angular momenta. They found that in this regime the essential information is captured by the geometry of a tetrahedron, and gave new formulae for 9j-, 12j- and 15j-symbols. We present here an alternative derivation which leads to a simpler formula, based on the use of the Ponzano–Regge formula for the relevant tetrahedron. The approach is generalized to Wigner 3nj-symbols with some large and small angular momenta, where more than one tetrahedron are needed, leading to new asymptotics for Wigner 3nj-symbols. As an illustration, we present 15j-symbols with one, two and four small angular momenta, and give an alternative formula to Yu’s recent 15j-symbol with three small spins. (paper)

  12. Vapour pressure and excess Gibbs free energy of binary mixtures of hydrogen sulphide with ethane, propane, and n-butane at temperature of 182.33K

    International Nuclear Information System (INIS)

    Lobo, L.Q.; Ferreira, A.G.M.; Fonseca, I.M.A.; Senra, A.M.P.

    2006-01-01

    The vapour pressure of binary mixtures of hydrogen sulphide with ethane, propane, and n-butane was measured at T=182.33K covering most of the composition range. The excess Gibbs free energy of these mixtures has been derived from the measurements made. For the equimolar mixtures G m E (x 1 =0.5)=(835.5+/-5.8)J.mol -1 for (H 2 S+C 2 H 6 ) (820.1+/-2.4)J.mol -1 for (H 2 S+C 3 H 8 ), and (818.6+/-0.9)J.mol -1 for (H 2 S+n-C 4 H 10 ). The binary mixtures of H 2 S with ethane and with propane exhibit azeotropes, but that with n-butane does not

  13. Global optimization numerical strategies for rate-independent processes

    Czech Academy of Sciences Publication Activity Database

    Benešová, Barbora

    2011-01-01

    Roč. 50, č. 2 (2011), s. 197-220 ISSN 0925-5001 R&D Projects: GA ČR GAP201/10/0357 Grant - others:GA MŠk(CZ) LC06052 Program:LC Institutional research plan: CEZ:AV0Z20760514 Keywords : rate-independent processes * numerical global optimization * energy estimates based algorithm Subject RIV: BA - General Mathematics Impact factor: 1.196, year: 2011 http://math.hnue.edu.vn/portal/rss.viewpage.php?id=0000037780&ap=L3BvcnRhbC9ncmFiYmVyLnBocD9jYXRpZD0xMDEyJnBhZ2U9Mg==

  14. Economic Drivers of Strategic & Critical Materials

    Science.gov (United States)

    2012-05-01

    Calla<la. r>eru, cnre ZINC 7J ----i Can.ad:J, Peru, Mexico, l relaniJ TIT .. .Nll.JM (&p1111ge) ’i">9 -----j K azaUI&tan. Japan. ~ R~a ~.0:!\\JM Ml N...G YPS’Uloil PHOSPI1AT E ROCK IRON and STEEL IRON and STE EL SlAG OEME:NT PUMICE DIIL\\IO.N !> (na:lr.ll t1du&trtal s!Oile) U:ME STO.N E (Ct...PLATINUM ZINC TU.NGSTE.N mA.~w.l ($f10nge) HICK EL PEAT MAGNESIUM METAL SltVER S t’UCON BERYLUUM MAGNESIUM COMPOU l>S ALUMI NUM PUMICIE

  15. First-Principles Study of the Polar TiC/Ti Interface

    Institute of Scientific and Technical Information of China (English)

    Limin LIU; Shaoqing WANG; Hengqiang YE

    2003-01-01

    The interface structure, work of adhesion, and bonding character of the polar TiC/Ti interface have been examined by the first-principles density functional plane-wave pseudopotential calculations. Both Ti- and C-terminated interfaces including six different interface structures were calculated, which present quite different features. For the Ti-terminated interface, the interfacial Ti-Ti bond has a strong metallic and weak covalent character; while for the C-terminated interface, the interfacial bond is a strong polar covalent interaction between the Ti-3d and C-2p orbital.The work of adhesion of C-terminated interface is nearly 9 J/m2 stronger than that of the Ti-terminated. It is found that each termination has relatively large work of adhesion, which is consistent with other polar interfaces.

  16. Pulsed chemical oxygen - iodine laser initiated by a transverse electric discharge

    International Nuclear Information System (INIS)

    Vagin, Nikolai P; Yuryshev, Nikolai N

    2001-01-01

    A pulsed chemical oxygen - iodine laser with a volume production of atomic iodine in a pulsed transverse electric discharge is studied. An increase in the partial oxygen pressure was shown to increase the pulse energy with retention of the pulse duration. At the same time, an increase in the iodide pressure and the discharge energy shortens the pulse duration. Pulses with a duration of 6.5 μs were obtained, which corresponds to a concentration of iodine atoms of 1.8 x 10 15 cm -3 . This concentration is close to the maximum concentration attained in studies of both cw and pulsed oxygen-iodine lasers. A specific energy output of 0.9 J litre -1 and a specific power of 75 kW litre -1 were obtained. The ways of increasing these parameters were indicated. It was found that SF 6 is an efficient buffer gas favouring improvements in the energy pulse parameters. (lasers)

  17. Prime Contract Awards, Fiscal Year 1984.

    Science.gov (United States)

    1984-01-01

    o NCv Ca 0 C a 0) 10 . a 4. .10a 0, Ga, 0w 10 . N104 N V a 10a .2at 0. wGa c N Co 0. V0- D V (0a 10 0i . or a 1 0Y N -a Na 1 Na N10 01 a V G *0 a ~a...atL U4 U -1 2- .0 UW web C-O: ILO 0 0 , 4242 6 1 9 -j 0 -1 w - W -0 4 - 4 WC 0 U > - C > . VC- 400IL I-1. ~24 -C -U W N 041- 0 . !k 0 1*4 W W WO W

  18. Portable devices for monitoring radon and its progeny in air

    International Nuclear Information System (INIS)

    Zhang Huaiqin; Yao Wanyuan; Su Jingling; Liu Jinhua

    1990-01-01

    We have developed two kinds of portable monitoring devices to measure the concentration and potential energy concentration of radon and its progeny in air. The thermoluminescence material CaSO4 (Tm) is used as the detection element. One of the devices is called passive radon monitor. The lowest detectable limit for radon in air is about 1.5 Bq/m 3 , as a sampling time being one week. Good reliability and ease to operate are its main advantages. The second kind of device is called a working level monitor which consists of a miniature remembrane pump and an integrating sampling probe. The lowest detectable limit is about 0.00043 WL (9x10 -9 J/m 3 ) for a sampling time of 6 hours. It weighs only 0.35 kg, but maintenance is necessary sometimes. (author). 6 refs, 2 figs, 4 tabs

  19. Wide spectrum antireflective coating for laser fusion systems. Final report

    International Nuclear Information System (INIS)

    Yoldas, B.E; Partlow, D.P.; Smith, H.D.; Mattox, D.M.

    1984-01-01

    A method of depositing a laser damage resistant, wide-spectrum antireflective coating on fused silica has been developed. This work was sponsored under a subcontract with the University of California, with technical direction from the Lawrence Livermore National Laboratory. The coating is applied from a specific silanol polymer solution and converted to a porous SiO 2 film. The pore size of the film is first reduced by a heat treatment to prevent uv scattering. Then gradation of the pore volume is achieved by a mild etching to a sufficient depth to prevent a smoother index transition from air to the substrate glass. The resulting antireflectivity covers the entire transmission range of silica and may be extended to a wavelength as short as 250 nm. Laser damage thresholds as high as 9 j/cm 2 have been demonstrated on processed samples

  20. Late complications after percutaneous tracheostomy and oral intubation: Evaluation of 1,628 procedures.

    Science.gov (United States)

    Storm, Benjamin; Dybwik, Knut; Nielsen, Erik Waage

    2016-05-01

    In large international studies, upper airway-related stenosis, granulomas, malacias, and laryngeal nerve palsies following percutaneous tracheostomy have an estimated incidence of 6% to 31%. The incidence following prolonged oral intubation is estimated to be 10% to 22%. The purpose of this study was to assess the incidence of late complications in our unit. Retrospective search of a single-unit intensive care patient population. Patient records for a defined period were searched using a predefined search string, identifying those who received invasive mechanical ventilation and split in subgroups by orotracheal tube or tracheostomy tube. This search was cross-linked with the International Statistical Classification of Diseases and Related Health Problems, 10th Revision (ICD-10) codes associated with recognized complications (J38.0, J38.3,J38.6, J38.7, J39.8, J39.9, J95.0, J95.5, J95.8, J95.9, J99, R04.8,S27.5). During the period January 1, 1997 to December 31, 2013, 32,852 patients were admitted to the intensive care unit. Of these, 1,620 patients received invasive mechanical ventilation. Out of this group, 519 had a tracheostomy and 1,109 were orally intubated. Four tracheostomized and zero orotracheally intubated patients had ICD-10 codes related to complications. From the patient records it became clear that three of four patients with tracheostomy had airway symptoms before being tracheostomized, and the fourth patient had her tracheostomy following a postintubation airway stenosis. Spanning a 17-year period, our study did not show any long-term symptomatic upper airway complications following tracheostomy and only one following orotracheal intubation. This contrasts the internationally estimated incidence. 4 Laryngoscope, 126:1077-1082, 2016. © 2015 The American Laryngological, Rhinological and Otological Society, Inc.

  1. Genome-Wide Transcription and Functional Analyses Reveal Heterogeneous Molecular Mechanisms Driving Pyrethroids Resistance in the Major Malaria Vector Anopheles funestus Across Africa.

    Science.gov (United States)

    Riveron, Jacob M; Ibrahim, Sulaiman S; Mulamba, Charles; Djouaka, Rousseau; Irving, Helen; Wondji, Murielle J; Ishak, Intan H; Wondji, Charles S

    2017-06-07

    Pyrethroid resistance in malaria vector, An. funestus is increasingly reported across Africa, threatening the sustainability of pyrethroid-based control interventions, including long lasting insecticidal nets (LLINs). Managing this problem requires understanding of the molecular basis of the resistance from different regions of the continent, to establish whether it is being driven by a single or independent selective events. Here, using a genome-wide transcription profiling of pyrethroid resistant populations from southern (Malawi), East (Uganda), and West Africa (Benin), we investigated the molecular basis of resistance, revealing strong differences between the different African regions. The duplicated cytochrome P450 genes ( CYP6P9a and CYP6P9b ) which were highly overexpressed in southern Africa are not the most upregulated in other regions, where other genes are more overexpressed, including GSTe2 in West (Benin) and CYP9K1 in East (Uganda). The lack of directional selection on both CYP6P9a and CYP6P9b in Uganda in contrast to southern Africa further supports the limited role of these genes outside southern Africa. However, other genes such as the P450 CYP9J11 are commonly overexpressed in all countries across Africa. Here, CYP9J11 is functionally characterized and shown to confer resistance to pyrethroids and moderate cross-resistance to carbamates (bendiocarb). The consistent overexpression of GSTe2 in Benin is coupled with a role of allelic variation at this gene as GAL4-UAS transgenic expression in Drosophila flies showed that the resistant 119F allele is highly efficient in conferring both DDT and permethrin resistance than the L119. The heterogeneity in the molecular basis of resistance and cross-resistance to insecticides in An. funestus populations throughout sub-Saharan African should be taken into account in designing resistance management strategies. Copyright © 2017 Riveron et al.

  2. Perspectives of the antipsoriatic heliotherapy in Poland.

    Science.gov (United States)

    Krzyścin, J W; Narbutt, J; Lesiak, A; Jarosławski, J; Sobolewski, P S; Rajewska-Więch, B; Szkop, A; Wink, J; Czerwińska, A

    2014-11-01

    Statistical analysis of the daily course of exposures to TL-01 tube radiation for 93 psoriatic patients from the Medical University of Łódź during 20-day phototherapy shows that the dose of 1 J/cm(2) represents a unit of single exposure necessary for psoriasis healing. This value is converted to the antipsoriatic effective dose of 317.9 J/m(2) using the TL-01 lamp irradiance spectrum and the antipsoriatic action spectrum. It is proposed that the daily exposure of 317.9 J/m(2) serves as the standard antipsoriatic dose (SAPD) providing a link between the cabinet and the out-door exposures and it could be used for planning heliotherapy in Poland. A model is proposed to calculate ambient antipsoriatic doses for 3 h exposures around the local noon (9 am-12 am GMT) based on satellite measurements of ozone and cloud characteristics. The model constants are determined by a comparison with pertaining antipsoriatic doses measured by the Brewer spectrophotometer in central Poland. It is found that 3 h exposures to solar radiation in the period 15 May-15 September provides the mean (2005-2013) doses in the range 2.7-3.1 SAPD over Poland. Thus, heliotherapy could be treated as an alternative to the cabinet phototherapy for almost 4 months. It seems that the most effective site for antipsoriatic heliotherapy is the south/east part of Poland (the Bieszczady Mountains). The heliotherapy could be carried out in existing national health centers equipped with the standard easy-to-use biometers for on-line monitoring of UV level and controlling duration of sunbathing to avoid erythema risks. It is even possible to control the antipsoriatic heliotherapy by a patient himself, using low-cost hand-held instruments measuring UV index. Copyright © 2014 Elsevier B.V. All rights reserved.

  3. Amplificación del Segundo Armónico Mediante el Uso de un Cristal Fotónico Amplificación del Segundo Armónico Mediante el Uso de un Cristal Fotónico

    Directory of Open Access Journals (Sweden)

    G. Cerda-Villicaña

    2012-02-01

    Full Text Available Presentamos evidencia experimental de la generación y amplificación de un haz de segundo armónico en una guía de onda plana de niobato de litio mediante la inscripción de un cristal fotónico unidimensional en dicha guía de onda. La observación fue realizada utilizando un láser de Neodimio-YAG (Nd:YAG en modo continuo (cw así como en amarre de modos, obteniendo pulsos con una potencia promedio por debajo del orden de nanojoules (10-9 J y con duración de 150 picosegundos (10-12 seg. La dispersión geométrica introducida por la estructura de bandas fotónica (PGB para los modos de la guía de onda a la frecuencia fundamental y doblada mejora las condiciones de empalme de fase y por lo tanto aumenta la eficiencia de conversión. We present experimental evidence of enhanced second harmonic generation in planar lithiumniobate waveguides by using a photonic crystal on the waveguide. The enhanced signal was observed by using a Nd: YAG pump laser in both continuous mode (c. w. and mode-locked. This last produced sub-nanojoules (10-9 J average power pulses with 150 picoseconds (10-12 s time duration. Phase matching conditions and the conversion efficiency process were improved because of the geometrical dispersion introduced in waveguide modes inside of the photonic band gap structure (PBG at fundamental and second harmonic frequencies.

  4. Intensity-Modulated Radiotherapy for Craniospinal Irradiation: Target Volume Considerations, Dose Constraints, and Competing Risks

    International Nuclear Information System (INIS)

    Parker, William; Filion, Edith; Roberge, David; Freeman, Carolyn R.

    2007-01-01

    Purpose: To report the results of an analysis of dose received to tissues and organs outside the target volume, in the setting of spinal axis irradiation for the treatment of medulloblastoma, using three treatment techniques. Methods and Materials: Treatment plans (total dose, 23.4 Gy) for a standard two-dimensional (2D) technique, a three-dimensional (3D) technique using a 3D imaging-based target volume, and an intensity-modulated radiotherapy (IMRT) technique, were compared for 3 patients in terms of dose-volume statistics for target coverage, as well as organ at risk (OAR) and overall tissue sparing. Results: Planning target volume coverage and dose homogeneity was superior for the IMRT plans for V 95% (IMRT, 100%; 3D, 96%; 2D, 98%) and V 107% (IMRT, 3%; 3D, 38%; 2D, 37%). In terms of OAR sparing, the IMRT plan was better for all organs and whole-body contour when comparing V 10Gy , V 15Gy , and V 20Gy . The 3D plan was superior for V 5Gy and below. For the heart and liver in particular, the IMRT plans provided considerable sparing in terms of V 10Gy and above. In terms of the integral dose, the IMRT plans were superior for liver (IMRT, 21.9 J; 3D, 28.6 J; 2D, 38.6 J) and heart (IMRT, 9 J; 3D, 14.1J; 2D, 19.4 J), the 3D plan for the body contour (IMRT, 349 J; 3D, 337 J; 2D, 555 J). Conclusions: Intensity-modulated radiotherapy is a valid treatment option for spinal axis irradiation. We have shown that IMRT results in sparing of organs at risk without a significant increase in integral dose

  5. Genome-Wide Transcription and Functional Analyses Reveal Heterogeneous Molecular Mechanisms Driving Pyrethroids Resistance in the Major Malaria Vector Anopheles funestus Across Africa

    Science.gov (United States)

    Riveron, Jacob M.; Ibrahim, Sulaiman S.; Mulamba, Charles; Djouaka, Rousseau; Irving, Helen; Wondji, Murielle J.; Ishak, Intan H.; Wondji, Charles S.

    2017-01-01

    Pyrethroid resistance in malaria vector, An. funestus is increasingly reported across Africa, threatening the sustainability of pyrethroid-based control interventions, including long lasting insecticidal nets (LLINs). Managing this problem requires understanding of the molecular basis of the resistance from different regions of the continent, to establish whether it is being driven by a single or independent selective events. Here, using a genome-wide transcription profiling of pyrethroid resistant populations from southern (Malawi), East (Uganda), and West Africa (Benin), we investigated the molecular basis of resistance, revealing strong differences between the different African regions. The duplicated cytochrome P450 genes (CYP6P9a and CYP6P9b) which were highly overexpressed in southern Africa are not the most upregulated in other regions, where other genes are more overexpressed, including GSTe2 in West (Benin) and CYP9K1 in East (Uganda). The lack of directional selection on both CYP6P9a and CYP6P9b in Uganda in contrast to southern Africa further supports the limited role of these genes outside southern Africa. However, other genes such as the P450 CYP9J11 are commonly overexpressed in all countries across Africa. Here, CYP9J11 is functionally characterized and shown to confer resistance to pyrethroids and moderate cross-resistance to carbamates (bendiocarb). The consistent overexpression of GSTe2 in Benin is coupled with a role of allelic variation at this gene as GAL4-UAS transgenic expression in Drosophila flies showed that the resistant 119F allele is highly efficient in conferring both DDT and permethrin resistance than the L119. The heterogeneity in the molecular basis of resistance and cross-resistance to insecticides in An. funestus populations throughout sub-Saharan African should be taken into account in designing resistance management strategies. PMID:28428243

  6. Criteria for Special Nuclear Materials Inventory and Control Procedures; Criteres a Suivre Pour Proceder a l'Inventaire des Matieres Nucleaires Speciales et aux Mesures de Controle; Kriterii dlya inventarizatsii spetsial'nykh yadernykh materialov i metody ucheta; Criterios a Que Deben Ajustarse los Procedimientos de Inventario y Control de los Materiales Nucleares Especiales

    Energy Technology Data Exchange (ETDEWEB)

    Kinderman, E. M.; Tarrice, R. R. [Stanford Research Institute, Menlo Park, CA (United States)

    1966-02-15

    nucleares se emplearan en grandes cantidades: basta senalar que un reactor de 500 MW, moderado por agua ligera, necesitara de 50 a 75 toneladas de material enriquecido al 3% y que es probable que en 1980 funcionen en el mundo de 200 a 300 reactores de esta potencia. La experiencia ha permitido elaborar procedimientos y practicas especiales para el control comercial de grandes cantidades de materiales baratos, como el carbon o el mineral de hierro, y de pequenas cantidades de materiales caros, como los metales preciosos. Aunque sus precios son similares a los de estos ultimos, los materiales nucleares especiales son de distinta clase y se utilizaran en cantidades mucho mayores. De todas formas, aunque quiza sea necesario recurrir a tecnicas especiales o adaptar tecnicas antiguas, en la mayoria de los casos bastara utilizar convenientemente los procedimientos ya conocidos de control de las existencias para proteger en forma adecuada las inversiones nacionales o individuales en esos materiales tan caros. En la memoria se exponen algunos criterios para el control de los materiales. Se estudian especialmente las tecnicas de control de las existencias (desde el balance contable anual hasta el inventario ffsico efectuado a diario) que resultan mas apropiadas dado el valor especffico y la cantidad total de los materiales nucleares especiales. Se presenta una matriz de soluciones para la administracion y el control de esas existencias. Se evalua la multiplicidad y la eficacia relativa de diversas tecnicas en momentos decisivos del suministro, el empleo y la regeneracion de los materiales. (author) [Russian] Odnoj iz samyh vazhnyh problem, s kotoroj stolknutsja predprinimateli, rukovoditeli i operatory v oblasti atomnoj jenergii, i osobenno v oblasti promyshlennoj jadernoj jenergetiki, javljaetsja ustanovlenie nadlezhashhego kontrolja inventarizacii jadernyh materialov, stoimost' kotoryh k 1980 godu prevysit 5 mlrd. doll. SShA. Special'nye jadernye materialy dorogi po sravneniju s

  7. Microbiological Studies on the Influence of Combined Processes of Heat and Irradiation on the Survival of Saccharomyces Cerevisiae Var. Ellipsoideus; Etudes Microbiologiques sur l'Influence d'un Traitement Mixte par Chauffage et Irradiation sur la Survie de Saccharomyces Cerevisiae Var. Ellipsoideus; Mikrobiologicheskie issledovaniya vliyaniya sovmestnykh protsessov nagreva i oblucheniya na vyzhivanie saccharomyces Cerevisiae Var. Ellipsoideus; Estudios Microbiologicos de la Influencia del Calentamiento e Irradiacion Combinados Sobre la Supervivencia del Saccharomyces Cerevisiae Var. Ellipsoideus

    Energy Technology Data Exchange (ETDEWEB)

    Stehlik, G.; Kaindl, K. [Institute for Biology and Agriculture, Reaktorzentrum, Seibersdorf (Austria)

    1966-11-15

    irradiacion se traduce en un grafico de supervivencia (fracciones de supervivencia) que presenta la forma de linea recta en funcion de la dosis de irradiacion en una escala semilogantmica para el intervalo de temperaturas comprendido entre la temperatura ambiente y 45 Degree-Sign C. Por encima de los 45 Degree-Sign C las lineas revelan un aumento de las supervivencias, en comparacion con la muestra no irradiada, para dosis inferiores a 30 krad. Comparando las pendientes de las lineas de supervivencia obtenidas a distintas temperaturas, puede observarse que en el caso de una irradiacion a temperaturas superiores a 40 Degree-Sign C se produce un acusado efecto. (author) [Russian] V ramkah mezhdunarodnoj programmy Zajbersdorfskoj laboratorii po oblucheniju fruktov i fruktovyh sokov s cel'ju ih sohranenija odnim iz naibolee vazhnyh issledovanij javljaetsja radiacionnaja sensibilizacija mikroorganizmov. Dlja izuchenija vlijanija termicheskoj obra tki i obluchenija na vyzhivanie drozhzhevyh kletok (obrazovanie kolonii) vysokoustojchivaja k radiacii raznovidnost' Saccharomyces cerevisiae var. ellipsoideus, vyrashhennaja v polusinteticheskoj pitatel'noj srede, podvergalas' v nachale log-fazy svoego razvitija kombinirovannoj obrabotke nagrevom i gamma-oblucheniem (istochnik - kobal't-60). Nagrev proizvodilsja ili neposredstvenno pered processom obluchenija, ili odnovremenno s nim, ili posle nego. Temperatura menjalas' ot 20 do 52,5 Degree-Sign C. Obluchenie velos' v horosho produtoj vozduhom stekljannoj trubke v intervale doz do 0,3 x 10{sup 6} rad. Ingibirujushee vlijanie takoj obrabotki zavisit ot posledovatel'nosti nagreva i obluchenija. Bylo ustanovleno sledujushhee: naibolee jeffektivnym javljaetsja odnovremennoe provedenie nagreva i obluchenija; menee jeffektivnym javljaetsja obluchenie pri komnatnoj temperature posle nagreva; naimenee jeffektivnym okazalsja nagrev posle obluchenija pri komnatnoj temperature. V rezul'tate kombinirovannoj termicheskoj i radiacionnoj obrabotki

  8. On Mixing Processes in the Sea; Processus de Melange dans la Mer; 041f 0420 041e 0414 ; Los Procesos de Mezclado en las Aguas del Mar

    Energy Technology Data Exchange (ETDEWEB)

    Joseph, Joachim [German Hydrographic Institute, Hamburg, Federal Republic of Germany (Germany)

    1960-07-01

    dolgozhivushhej iskusstvennoj radioaktivnosti v obshirnyh rajonah okeana neizvestno. Nashe znanie processov smeshenija i rasseivanija v morjah nedostatochno dlja kakih-libo prognozov. Otsutstvie dostatochnyh znanij o vozmozhnyh vrednyh posledstvijah ni v koem sluchae ne dolzhno privesti nas k oshibochnomu chuvstvu bezopasnosti. Takim obrazom, sleduet vnimatel'no izuchit' vse drugie vozmozhnosti jeffektivnogo udalenija othodov atomnoj promyshlennosti. Vvidu jetogo V. Filbert izuchil vopros udalenija othodov vo l'dy arkticheskogo i antarkticheskogo rajonov zemli. Tshhatel'noe issledovanie i opyty processov, vyzvannyh sbrasyvaniem radioaktivnyh materialov v morja, javljajutsja neizbezhnoj neobhodimost'ju. Doskonal'noe znanie jetih problem javljaetsja neizbezhnym dlja otveta na mnogie nerazreshennye voprosy v jetoj oblasti. V svjazi s jetim issledovanie processov smeshenija i rasseivanija v morjah priobretaet pervostepennuju vazhnost'. Budet proveden obzor, pokazyvajushhij nastojashhij uroven' teoreticheskih znanij i prakticheskogo opyta. V opredelennyh predelah statisticheskie dannye mogut osvetit' vopros o peremeshhenii v morjah nekotoryh koncentrirovannyh veshhestv iz odnoj tochki v rajone so srednim radiusom ot 10 do 1500 km. Jetot metod zavisit ot faktov, svjazannyh s turbulentnym rezhimom, poka eshhe ne izvestnym dlja mnogih morskih rajonov. Privoditsja ob{sup j}asnenie razlichnyh uslovij, sushhestvujushhih v razlichnyh rajonah okeana, a takzhe vo vnutrennih morjah. Predlagaetsja plan usilenija neobhodimyh issledovatel'skih rabot po okeanografii na mezhdunarodnoj osnove. (author)

  9. Rapid Methods of Determining Internal Radioactive Contamination; Methodes Rapides Permettant d'Evaluer la Contamination Radioactive Interne; 0411 042b 0414 ; Metodos Rapidos para Determinar la Contaminacion Radiactiva Interna

    Energy Technology Data Exchange (ETDEWEB)

    Sedlet, J.; Fairman, W. D.; Robinson, J. J. [Industrial Hygiene and Safety Division, Argonne National Laboratory, Argonne, IL (United States)

    1965-06-15

    ) [Russian] Metody opredelenija vnutrennego radioaktivnogo zagrjaznenija, prednaznachennye dlja ispol'zovanija vo vremja avarij i neschastnyh sluchaev, dolzhny byt' dostatochno bystrymi i chuvstvitel'nymi, chtoby v techenie ogranichennogo vremeni poluchit' trebuemye rezul'taty dlja uspeshnyh meroprijatij po spaseniju postradavshih ot sverhobluchenija. Priemlemye sroki budut zaviset', v chastnosti, ot chisla obluchennyh lic. Esli mozhno poluchit' znachitel'nye rezul'taty v techenie neskol'kih chasov, to mozhno osushhestvit' pervichnuju funkciju bystrogo izmerenija radioaktivnosti organizma s cel'ju okazanija pomoshhi pri svedenii k minimumu ushherba, nanosimogo organizmu otlozhivshimisja vnutri radioizotopami. Dlja avarijnoj ocenki vnutrennego zagrjaznenija rassmatrivajutsja sledujushhie metody: schet gamma- i rentgenovskih luchej in vivo, schet gamma- i rentgenovskih luchej v obrazcah vydelenij i krovi bez obrabotki obrazcov, radiohimicheskie razdelenija obrazcov vydelenij i krovi posle scheta. Voprosy primenimosti, ogranichenij, chuvstvitel'nosti i predelov vremeni kazhdogo metoda obsuzhdajutsja dlja opredelennyh radioizotopov, v tom chisle aktinidov, obshhih produktov delenija, beta-izluchatelej nizkoj jenergii i drugih. Ukazyvajutsja predpochitaemye metody. Metod schitaetsja otvechajushhim trebovanijam, esli v techenie neskol'kih chasov mozhno obnaruzhit' pogloshhenie, jekvivalentnoe naimen'shej velichine postojannogo dopustimogo soderzhanija radioaktivnosti v organizme cheloveka, ustanovlennoj Mezhdunarodnoj komissiej po radiologicheskoj zashhite. Hotja takaja chuvstvitel'nost' ne vsegda javljaetsja neobhodimoj, ona vsegda dolzhna byt' dostatochnoj, i ee mozhno obychno poluchit'. Ispol'zovanie al'fa-izluchatelej i chistyh beta-izluchatelej nizkoj 3Heprnn predstavljaet naibol'shie trudnosti, poskol'ku soderzhanie jetih izotopov v organizme cheloveka obychno nuzhno opredeljat' putem radiohimicheskogo analiza krovi ili vydelenij. Predstavljajutsja metody radiohimicheskogo

  10. Mostre e musei nei cinegiornali dell’Archivio Luce tra le due guerre / Exhibitions and museums in the newsreels of the Institute Luce Archive between the WWI and the WWII

    Directory of Open Access Journals (Sweden)

    Tommaso Casini

    2016-12-01

    Full Text Available Il patrimonio cinematografi co dell’Istituto Nazionale Luce raccoglie alcune centinaia di ore di fi lmati che riguardano la storia delle mostre e dei musei del ‘900 in Italia e non solo. Sin dalla sua nascita, nel 1925, il LUCE (L’Unione Cinematografi ca Educativa inviò i suoi operatori a documentare musei, gallerie e mostre, specialmente in occasione di visite ufficiali dei sovrani e di esponenti del regime fascista. Cinegiornali e documentari didattici sono visibili on-line sul sito dell’Archivio, e parzialmente anche sul canale dedicato di YouTube. Il contributo traccia una prima ricognizione di un vasto panorama di materiali documentari e informativi, dando conto dell’uso del mezzo fi lmico per documentare le esposizioni temporanee e i musei. L’importanza del materiale del LUCE, che a partire dal 1931 diventa anche sonoro, offre uno spaccato ancora poco conosciuto di questa forma di documentazione in relazione al coevo dibattito sui musei, tra propaganda e uso pedagogico dell’immagine. Vengono esaminate modalità e strategie di presentazione visive e testuali distinguendo tra gli i musei di archeologia, arte antica, arte moderna e contemporanea, considerando alcuni casi specifi ci di esposizioni temporanee come la Biennale di Venezia e la Quadriennale di Roma. La conclusione è dedicata ad una rifl essione sui viaggi di Adolf Hitler in Italia in rapporto al patrimonio artistico e architettonico. The film heritage of the National Institute Luce collects several hundred hours of footage covering the history of the exhibitions and museums of the ‘900 in Italy and beyond. Since its inception in 1925, the LUCE (The Union Educational Film sent his workers to document museums, galleries and exhibitions, especially on the occasion of offi cial visits of kings and members of the fascist regime. Newsreels and educational documentaries and that for some years on-line are also visible on the Archive audiovisual database, and partly also

  11. IL PARLATO DELL’INSEGNANTE NELLA CLASSE DI LINGUA

    Directory of Open Access Journals (Sweden)

    Daniele Corradi

    2013-01-01

    Full Text Available In questo contributo si analizzano, in un contesto di insegnamento/apprendimento dell’italiano L2, esempi di parlato del docente, a cui è affidata la gestione della comunicazione didattica, ed esempi di parlato degli apprendenti, osservando, in particolare, in quale modo la loro produzione orale e il loro coinvolgimento nell’interazione verbale in classe sia previsto e guidato dalla forma della lezione e dalle strutture dialogiche a cui è correlato l’apprendimento della lingua. Nell’analisi di parlato e di interazioni verbali in classe si sono riscontrati due modelli fondamentali: la lingua della conversazione, macro-obiettivo comunicativo di lezioni svolte nell’ambito del progetto “Marco Polo” presso l’Università degli Studi di Milano, e la lingua dell’esposizione, perseguito nelle lezioni dei corsi sull’italiano disciplinare L2, sempre promossi dall’UniMi, e denominati “CALP” (Cognitive Academic Language Proficiency. La scelta metodologica di riportare la trascrizione e l’analisi di un’intera lezione del progetto “Marco Polo” è motivata dalla convinzione che la lezione è l’unità che riassume tutti gli elementi costitutivi del discorso didattico. A questa analisi segue l’esame di campioni audio-video registrati durante le lezioni dei corsi CALP, per mostrare come l’insegnamento/apprendimento dell’italiano L2/LS possa richiedere diverse tipologie di materiali e strumenti che supportano il parlato dell’insegnante e facilitano la comunicazione di contenuti didattici tra insegnante e apprendenti, se usati coerentemente con i micro-obiettivi e macro-obiettivi della lezione.  Language teacher in-class speech In this paper we analyze examples of in-class teacher speech, responsible for managing the teaching communication, and examples of learners' speech in an Italian L2 teaching/learning context. In particular we observe how the student’s speech and involvement in verbal interaction in the

  12. IL FILM A LEZIONE DI ITALIANO L2: GLI ESAMI AL CINEMA

    Directory of Open Access Journals (Sweden)

    Michela Albizzati

    2014-02-01

    Full Text Available Può il film rivelarsi uno strumento utile a lezione di italiano L2? Quali sono i limiti ed i vantaggi dell’utilizzo di materiale audiovisivo autentico in aula? Come strutturare un’attività basata sulla visione di un film italiano in lingua originale? Quali strategie mette in atto l’apprendente per comprendere un film nella L2? “Il film a lezione di italiano L2: gli esami al cinema” cerca di rispondere a queste domande attraverso una riflessione sull’utilità del cinema a lezione e proponendo un’attività didattica basata sulla visione di sequenze tratte da film italiani. Considerando la pellicola come documento di civiltà, veicolo di una lingua viva e “in situazione” ed esperienza di apprendimento plurisensoriale, l’articolo mette in luce come l’apprendimento dell’italiano L2 possa trarre beneficio dall’utilizzo in aula di materiali audiovisivi autentici quali i film, se opportunamente selezionati e didattizzati. Dalla riflessione alla pratica: dopo aver identificato obiettivi, destinatari ed i loro bisogni linguistico-comunicativi, viene presentata un’attività basata sulla didattizzazione di tre sequenze che hanno come tema centrale l’esame universitario orale. Ponendo i bisogni linguistico-comunicativi dei discenti al centro si scoprirà che, se opportunamente didattizzato, un film o parte di esso può trasformarsi in materiale didattico estremamente utile ai fini dell’apprendimento di una L2, nonché fonte inesauribile di spunti a partire dai quali l’insegnante può creare attività didattiche originali e stimolanti non solo linguistiche ma anche interculturali. Movies during italian l2 lessons: exams at the cinemaAre movies useful tools during Italian L2 lessons? What are the limits and advantages of using authentic audio-visual materials in the classroom? How can an activity based on viewing an Italian film in the original language be structured? What strategies do learners use to understand movies in

  13. Portable hyperspectral device as a valuable tool for the detection of protective agents applied on hystorical buildings

    Science.gov (United States)

    Vettori, S.; Pecchioni, E.; Camaiti, M.; Garfagnoli, F.; Benvenuti, M.; Costagliola, P.; Moretti, S.

    2012-04-01

    the laboratory experiments indicate that this hyperspectral technique is able to distinguish the different protective agents and, therefore, may be used to monitor the conservation treatments employed for the stone surfaces of historic materials. [1] G.G. Amoroso, M. Camaiti, Scienza dei materiali e restauro - La pietra: dalle mani degli artisti e degli scalpellini a quelle dei chimici macromolecolari, Alinea Ed., Firenze, 1997. [2] S. Vettori, M. Benvenuti, M. Camaiti, L. Chiarantini, P. Costagliola, S. Moretti, E. Pecchioni, 2008, "Assessment of the deterioration status of historical buildings by hyperspectral imaging techniques", in Proceedings of the "In situ Monitoring of Monumental Surfaces -SMS/08" Congress, Edifir-Edizioni Firenze 2008, 55-64. [3] M. Camaiti, S. Vettori, M. Benvenuti, L. Chiarantini, P. Costagliola, F. Di Benedetto, S. Moretti, F. Paba, E. Pecchioni, 2011, "Hyperspectral sensor for gypsum detection on monumental buildings", Journal of Geophysics and Engineering, 8, S126-S131.

  14. Raccomandazione CM/ Rec(20145 del Comitato dei Ministri agli Stati membri sull’importanza delle competenze nella(e lingua(e di scolarizzazione per l’equità e la qualità nell’istruzione e per il successo scolastico

    Directory of Open Access Journals (Sweden)

    (Adottata dal Comitato dei Ministri il 2 Raccomandazione C/M Rec(20145

    2015-02-01

    Full Text Available L’espressione “lingua di scolarizzazione” è usata per indicare la “lingua usata per fini di studio” e fa riferimento alla lingua (nazionale o maggioritaria nelle sue diverse varietà diafasiche ma anche diamesiche e comprende la lingua usata nella vita scolastica, la lingua usata dall’insegnante per esporre oralmente i contenuti disciplinari e per svolgere l’attività didattica, la lingua usata per l’assegnazione e lo svolgimento dei compiti e delle attività scolastiche, la lingua per la valutazione e/o la certificazione degli apprendimenti, la lingua interdisciplinare e metalinguistica trasversale alle diverse discipline di insegnamento, la lingua di ciascuna disciplina, la lingua dei materiali e dei testi (manuali, articoli, testi di divulgazione, enciclopedie, ecc, su stampa o su siti Internet per l’insegnamento/apprendimento disciplinare. È, insomma, la lingua attraverso la quale si costruiscono gli apprendimenti scolastici (saperi, nozioni, ragionamenti, comportamenti, ecc. quale che sia la lingua madre degli apprendenti.La Raccomandazione approvata dal Comitato dei Ministri del Consiglio d’Europa che qui si presenta sottolinea come la padronanza della lingua di scolarizzazione sia indispensabile per il successo scolastico degli apprendenti immigrati come degli apprendenti la cui lingua di scolarizzazione è anche la lingua madre usata nella comunicazione ordinaria e in particolare per gli apprendenti cosiddetti “vulnerabili” che provengono da ambienti socio-economicamente e culturalmente svantaggiati. Far acquisire tale padronanza è un compito e una responsabilità dei decisori politici così come di tutti gli insegnanti (tutti gli insegnanti sono insegnanti di lingua; il rapporto che accompagna la Raccomandazione suggerisce strategie e modalità da implementare nella definizione dei curricoli e nelle pratiche di insegnamento a scuola.  Recommendation CM/Rec(20145of the Committee of Ministers to member

  15. La raccolta archeologica del Museo Comunale di Fermo: note su alcune terrecotte architettoniche romane / The archaeological collection of Fermo’s Civic Museum: notes on a group of architectural terracotta

    Directory of Open Access Journals (Sweden)

    Emanuela Stortoni

    2013-05-01

    Full Text Available In questo lavoro sono enucleate alcune preliminari considerazioni riguardo ad un gruppo di terrecotte architettoniche, facenti parte della ricca ed interessante collezione archeologica del Museo Comunale di Fermo, ancora troppo poco nota alla letteratura scientifica. La raccolta, costituita ufficialmente nel 1890 anche grazie al contributo di eclettici cultori dell’antichità, come il Carducci e i De Minicis, si compone di qualche migliaio tra manufatti e monete, in gran parte di età proto-storica e romana, con significative testimonianze etrusche, greche e tardo-antiche. Nonostante l’eterogeneità, la pertinenza a differenti facies culturali, la frammentarietà e la mancanza di contestualizzazione dei reperti, la raccolta fermana rappresenta un prezioso esempio di collezionismo archeologico dell’area marchigiana tra XVIII e XIX sec. La possibilità, inoltre, di ricondurre, pur se genericamente, molti di questi materiali a Fermo e al suo territorio fa della raccolta anche un importante strumento di indagine per migliorare la lettura storico-archeologica di uno dei più antichi e vivaci centri piceni e romani del territorio regionale, qual è appunto Firmum Picenum. Lo studio sulle terrecotte architettoniche della raccolta, benché ancora incompleto, ne è una dimostrazione. Trattasi di un piccolo nucleo, composto da sima, antepagmenta, antefisse e acroteri, molto frammentari, probabili parti del rivestimento delle strutture lignee di edifici diversi, forse per lo più sacri. Le terrecotte in esame sono databili tra la fine del III sec. a.C. e gli inizi del I sec. a.C., ad eccezione di un solo manufatto ascrivibile al primo quarto del I sec. d.C. Gli ambiti cronologici individuati ben si contestualizzano con i periodi rispettivamente della prima e della seconda colonizzazione di Firmum Picenum.   This work presents some preliminary considerations concerning a group of terracotta architectural features held in the rich and interesting

  16. Model-based choice between different alternatives of solid waste management applied to the province of Trent; Applicazione di un modello decisionale per la gestione dei rifiuti solidi al caso del Trentino

    Energy Technology Data Exchange (ETDEWEB)

    Canziani, R. [Milan Politecnico, Milan (Italy). Dipt. di Ingegneria Idraulica, Ambientale e del Rilevamento; Ragazzi, M. [Trent Univ., Trent (Italy). Dipt. di Ingegneria Civile e Ambientale; Tonolli, E.

    2000-06-01

    performance indicators have higher values. [Italian] I sistemi di supporto alle decisioni che fanno uso di tecniche di analisi multicriterio sono strumenti che, adattandosi ai vari problemi, affiancano il decisore senza sostituirlo, assistendolo nella formulazione del problema, suggerendo e confrontando soluzioni alternative, scartando quelle inefficienti. per valutare la scelta tra due ipotesi alternative di gestione dei rifiuti solidi urbani e' stato applicato al caso di Trento un modello di supporto alle decisioni denominato AHP (Analytic Hierarchy Process), ampiamente utilizzato nella valutazione del ciclo di vita dei prodotti (LCA). Il metodo consente di evidenziare la soluzione che, tra piu' alternative rispetta maggiormente la scala di priorita' definita dal decisore, mantenendo quindi la maggior coerenza possibile tra le premesse e gli obiettivi. Il modello ha messo a confronto due sistemi integrati di smaltimento dei rifiuti per il Trentino. Una soluzione basata sullo schema del Piano Provinciale di smaltimento dei rifiuti del 1997 in cui la discarica ha ancora un ruolo di primo ordine, ed una soluzione alternativa che attribuisce un ruolo centrale alla termodistruzione. Ilmodello ha integrato contemporaneamente tutti gli indicatori (economici, ambientali, energetici e prestazionali), e ha consentito di identificare come soluzione migliore, l'ipotesi alternativa. I vantaggi ambientali, energetici e di prestazione (maggiore recupero di energia e materiali, maggiore autonomia di smaltimento garantita dal sistema e minore impatto tossicologico) conseguibili con la seconda ipotesi, opportunamente pesati, possono orientare il decisore verso una scelta non dettata da sole motivazioni di ordine economico, ma che tenga conto delle esternalita' incluse nella valutazione.

  17. Railway traffic noise pollution. Source, propagation and abatement systems; L'inquinamento acustico prodotto da traffico ferroviario. Origine, propagazione e sistemi di attenuazione. Progetto Apparati silenti

    Energy Technology Data Exchange (ETDEWEB)

    Lanchi, M.; Salernitano, E. [ENEA, Div. Nuovi Materiali, Centro Ricerche Casaccia, Rome (Italy)

    2001-07-01

    specifico alla Legge Quadro n. 447 del 26/10/95 e al D.P.R. n. 459 del 18/11/98. Vengono poi trattati, da un punto di vista fenomenologico e di modellizzazione, i meccanismi di generazione e di propagazione del rumore, con particolare riferimento al processo di attenuazione del livello sonoro, ad opera di dispositivi naturali o artificiali. Lo studio di quest'ultimo aspetto rappresenta la parte centrale del presente lavoro: sono state esaminate diverse configurazioni di barriere antirumore artificiali, riportando i risultati sia di sperimentazioni condotte in situ, sia di simulazioni avanzate. Le prestazioni di diverse soluzioni schermanti, caratterizzate da geometrie e materiali differenti, sono state messe a confronto in base a parametri tecnici, economici e di fattibilita'. Infine sulla base delle attuali tecnologie, viene proposta una soluzione progettuale innovativa per la realizzazione di un sistema antirumore efficace e a basso impatto visivo. Essa e' costituita da una barriera fissa, adiacente ai binari e realizzata in plastica riciclata, e da uno schermo mobile, solidale al vagone, in materiale composito. Secondo i criteri di confronto sopra esposti, tale soluzione sembra rispondere alle esigenze di riduzione del fonoinquinamento, basso impatto ambientale e costi contenuti.

  18. Proposta di uno studio multicentrico per la valutazione del fenomeno delle infezioni correlate a pratiche assistenziali in residenze socioassistenziali in Italia

    Directory of Open Access Journals (Sweden)

    S. Brusaferro

    2003-05-01

    Full Text Available

    Razionale dello studio proposto In contesti come le Residenze Sanitarie Assistenziali (RSA, le Residenze Protette (RP, l’Assistenza Domiciliare Integrata (ADI la letteratura e le prime esperirne italiane evidenziano come il problema ICPA sia importante e, pur variando le tipologie di infezione prevalenti, i costi individuali, sociali ed economici ad esse collegati rimangono molto elevati.

    In questo scenario diventa importante che i Comitati per il Controllo delle Infezioni Ospedaliere (CIO aziendali affrontino il problema del controllo delle infezioni in ambito extraospedaliero e comincino a strutturare modelli organizzativi in grado di operare efficacemente. Il dimensionamento del problema, ovvero l’attività di sorveglianza epidemiologica, anche in questo caso è tra le prime attività necessarie di provata efficacia.

    Obiettivo dello studio: una prima valutazione della dimensione del problema ICPA nelle strutture RSA presenti nelle diverse regioni italiane attraverso uno studio di prevalenza nazionale. Materiali e metodi: l progetto prevede una prima fase con l’individuazione dei centri partecipanti e dei rispettivi referenti medici ed infermieristici. Successivamente si procederà, utilizzando la metodologia già testata in uno studio pilota, alla formazione del personale sull’uso degli strumenti. Saranno arruolati tutti i pazienti degenti da oltre 48 ore nelle RSA partecipanti, escludendo quelli in dimissione o in trasferimento nel giorno di rilevazione. I rilevatori, esterni alla struttura, raccoglieranno i dati consultando il quaderno infermieristico, il quaderno terapia, il diario clinico, la cartella clinica ed esaminando ciascun paziente per validare la eventuale presenza di “devices” e confermare sintomi e segni rientranti nelle definizioni di caso. Laddove necessario verrà consultato il personale medico ed infermieristico della struttura. Le variabili raccolte saranno centrate su dati

  19. Sicurezza, tollerabilitá ed immunogenicitá di un vaccino influenzale a virosomi somministrato per via intranasale a soggetti HIV positivi e negativi residenti in una comunitá di recupero

    Directory of Open Access Journals (Sweden)

    R. Gasparini

    2003-05-01

    Full Text Available

    Obiettivi: valutatazione della sicurezza, tollerabilità
    e immunogenicità di un nuovo vaccino influenzale
    virosomale, adiuvato con la frazione termolabile
    della tossina di E. Coli, somministato per via
    intranasale a soggetti ex tossicodipendenti, HIV
    positivi e negativi.

    Materiali e metodi: 349 soggetti HIV negativi ed 88
    HIV positivi hanno ricevuto 2 dosi di vaccino a distanza di 8 1giorni. I soggetti hanno registrato su un apposito diario clinico la comparsa di reazioni locali e sistemiche. L’immunogenicità è stata valutata mediante HAI test al giorno della vaccinazione (T0 e a distanza di 29+3 giorni dalla stessa (T1.

    Risultati: non si sono verificati seri eventi avversi. Cefalea e naso chiuso sono state le reazioni postimmunizzazione, sistemiche e locali, più frequenti. Nel gruppo di soggetti HIV negativi, le percentuali di sieroconversione sono state 41,26% per il ceppo virale A/H3N2, 43,55% per A/H1N1 e 41,26% per il ceppo B.
    Le percentuali di sieroprotezione sono state le seguenti: 68,48% per A/H3N2, 67,9% per A/H1N1 e 85,95% per B. L’incremento del Titolo Geometrico Medio (GMT T1/T0 è stato di 2,68 per A/H3N2, 3,41 per A/H1N1 e 2,58 per B, in ottemperanza ai criteri E.M.E.A. Il gruppo di soggetti HIV positivi ha mostrato una risposta immunologica minore (percentuali di sieroconversione: 33% per A/H3N2, 28,4% per A/H1N1, 39,8% per B; percentuali di sieroprotezione: 50% per A/H3N2, 36,4% per A/H1N1, 63,6% per B; GMT T1/T0: 2,1% per A/H3N2, 1,9% per A/H1N1e 2,3% per B. La regressione logistica ha dimostrato come una conta di
    CD4+ ›350/ml e un titolo anticorpale prevaccinale ›5
    siano parametri correlati positivamente con il livello di
    protezione nei soggetti HIV positivi.

    Conclusioni: il vaccino si è dimostrato sicuro e ben tollerato in entrambi i gruppi. L

  20. Raccomandazione CM/ Rec(20145 del Comitato dei Ministri agli Stati membri sull’importanza delle competenze nella(e lingua(e di scolarizzazione per l’equità e la qualità nell’istruzione e per il successo scolastico

    Directory of Open Access Journals (Sweden)

    (Adottata dal Comitato dei Ministri il 2 aprile 2014 in occasione della riunione 1196 dei Delegati dei Ministri Raccomandazione C/M Rec(20145

    2014-07-01

    Full Text Available L’espressione “lingua di scolarizzazione” è usata per indicare la “lingua usata per fini di studio” e fa riferimento alla lingua (nazionale o maggioritaria nelle sue diverse varietà diafasiche ma anche diamesiche e comprende la lingua usata nella vita scolastica, la lingua usata dall’insegnante per esporre oralmente i contenuti disciplinari e per svolgere l’attività didattica, la lingua usata per l’assegnazione e lo svolgimento dei compiti e delle attività scolastiche, la lingua per la valutazione e/o la certificazione degli apprendimenti, la lingua interdisciplinare e metalinguistica trasversale alle diverse discipline di insegnamento, la lingua di ciascuna disciplina, la lingua dei materiali e dei testi (manuali, articoli, testi di divulgazione, enciclopedie, ecc, su stampa o su siti Internet per l’insegnamento/apprendimento disciplinare. È, insomma, la lingua attraverso la quale si costruiscono gli apprendimenti scolastici (saperi, nozioni, ragionamenti, comportamenti, ecc. quale che sia la lingua madre degli apprendenti.La Raccomandazione approvata dal Comitato dei Ministri del Consiglio d’Europa che qui si presenta sottolinea come la padronanza della lingua di scolarizzazione sia indispensabile per il successo scolastico degli apprendenti immigrati come degli apprendenti la cui lingua di scolarizzazione è anche la lingua madre usata nella comunicazione ordinaria e in particolare per gli apprendenti cosiddetti “vulnerabili” che provengono da ambienti socio-economicamente e culturalmente svantaggiati. Far acquisire tale padronanza è un compito e una responsabilità dei decisori politici così come di tutti gli insegnanti (tutti gli insegnanti sono insegnanti di lingua; il rapporto che accompagna la Raccomandazione suggerisce strategie e modalità da implementare nella definizione dei curricoli e nelle pratiche di insegnamento a scuola.  Recommendation CM/Rec(20145 of the Committee of Ministers to member States

  1. Profili di salute soggettivi e oggettivi: una combinazione vincente

    Directory of Open Access Journals (Sweden)

    C. Quercioli

    2003-05-01

    Full Text Available

    Introduzione: nella valutazione prospettica dell’impegno assistenziale richiesto o retrospettiva del risultato di salute ottenuto, entrambi collegabili a meccanismi retributivi, diventa sempre più importante usare sintetici descrittori di severità/complessità/outcome. In quest’ottica abbiamo studiato con strumenti oggettivi (Charlson Index Score-CSI e soggettivi (SF36 lo stato di salute di pazienti non ospedalizzati. Obiettivo: confrontare e correlare i livelli di salute registrati con i due strumenti.

    Materiali e Metodi: il CSI è un indice che considera numero e severità delle copatologie. Il questionario SF36 studia lo stato di salute percepito attraverso 8 domini. Sono stati studiati 137 pazienti di un Medico di Medicina Generale, che ha fornito età, sesso, livello di istruzione e stato civile dei pazienti. È stato creato un modello di regressione in cui il punteggio del CSI costituiva la variabile dipendente e le quattro scale dell’SF36 che sono risultate correlate con il CSI le variabili indipendenti. Risultati: è stata identificata correlazione tra i punteggi del CSI e le scale Salute Generale (SG (Coefficiente di Spearman 0,38 p‹0,001, Attività Fisica (AF (C.S. 0,35 p‹0,001, Ruolo Fisico (RF (C.S. 0,37 p‹0,001, Ruolo Emotivo (RE (C.S. 0,25 p=0,003. Aggiustando il CSI e le suddette 4 scale dell’SF 36 per “sesso”, “livello di istruzione” e “stato civile”, si è trovato che: (i “stato civile” influenza l’associazione tra RF e CSI (crude O.R. 1,71, p‹0,001; O.R. coniugati 1,47 p= 0,025; O.R. non coniugati 3,05 p‹ 0,001 e SG e CSI (crude O.R. 1,76 p‹0,001; O.R. stato civile 1,61 p=0,006; (ii “livello di istruzione” influenza l’associazione tra AF e CSI (crude O.R. 1,88 p‹0,001; O.R. livello di istruzione 1,76 p=0,001 e SG e CSI (crude O.R. 1,76 p‹0,001; O.R. elevata istruzione 1,22 p=0,33; O.R. scarsa istruzione 2,69 p‹0,001.

  2. Human Periapical Cysts-Mesenchymal Stem Cells Cultured with Allogenic Human Serum are a “clinical-grade” construct alternative to bovine fetal serum and indicated in the regeneration of endo-periodontal tissues

    Directory of Open Access Journals (Sweden)

    Marco Tatullo

    2018-06-01

    Full Text Available Aim: Our research investigated the use of human serum (HS as a safe and clinical-grade culture medium, using a new cell-model: hPCy-MSCs. This article is aimed to concretely applicate the concept of “waste-based regenerative dentistry” to translate it in future endo-periodontal applications. Methodology: HPCy-MSCs were cultured in 2 different mediums, both containing α-MEM: the 1st with 10% FBS (Control group, and the 2nd with 10% human serum (Test group.Cell proliferation and stemness assays, gene expression, immunophenotypic analysis and osteogenic differentiation were performed to verify our hypothesis. cDNA samples were amplified with qPCR.Experiments were performed in triplicate and analysed with statistical software. Results: The hPCy-MSCs cultivated in a medium with HS were morphologically similar to those cultivated with FBS, and showed a significantly higher proliferation rate. Von Kossa's staining revealed that osteoblasts from hPCy-MSCs in HS implemented with osteogenic induction factors, showed a better osteogenic activity, also confirmed by a significant upregulation of osteopotin (OPN and matrix extracellular phosphoglycoprotein (MEPE. Conclusions: HPCy-MSCs cultivated in HS showed phenotypic stability and a clear regenerative binding, thus, suggesting these two components as a clinically-grade construct for future endo-periodontal therapies. Riassunto: Obiettivi: La nostra ricerca ha analizzato l’utilizzo del siero umano (HS come mezzo di coltura sicuro e “clinical-grade”, per uso clinico, utilizzando un nuovo modello cellulare: le hPC-MSCs. Questo articolo ha lo scopo di applicare concretamente il concetto di “odontoiatria rigenerativa basata sui rifiuti biologici”, al fine di tradurlo in future applicazioni endo-periodontali. Materiali e metodi: Le HPCy-MSCs sono state coltivate in 2 mezzi di coltura diversi, entrambi contenenti α-MEM: il primo con 10% di FBS (gruppo di controllo e il secondo con il 10% di siero

  3. AV e attività di eccellenza. Nuove opportunità localizzative nel sistema Roma-Napoli

    Directory of Open Access Journals (Sweden)

    Adriana Galderisi

    2008-06-01

    Full Text Available Il contributo propone una lettura delle possibili influenze della realizzazione delle reti AV sulla localizzazione/distribuzione di attività di eccellenza, quali attività direzionali, di management, di servizio alle imprese e alla pubblica amministrazione, con specifico riferimento alla tratta AV Roma-Napoli. A partire da una caratterizzazione delle attività di eccellenza, se ne evidenzia anzitutto la spiccata tendenza alla concentrazione urbana, la dipendenza da efficaci connessioni sia immateriali che materiali e la rilevanza assunta dalla variabile temporale nelle scelte localizzative (Sassen, 2001. Quindi, in riferimento ad alcune esperienze europee, si esaminano i principali effetti, in termini di attrazione/concentrazione di tali attività, connessi alla realizzazione delle reti AV (Sands 1993; Vickerman e Ulied, 2006; Gemeente Amsterdam, 2007. Sulla base di tali considerazioni e tenendo conto delle più recenti definizioni e metodi di misura dell’accessibilità (Axhausen et al. 2006; Spiekermann, Wegener, 2005, lo studio propone un indicatore di “accessibilità” finalizzato ad individuare e graduare, in ragione dei livelli di accessibilità, un sistema di luoghi urbani interconnessi mediante reti su ferro (AV e reti metropolitane e regionali dai quali le attività di eccellenza potranno massimizzare il proprio bacino di utenza. L’individuazione di un sistema di luoghi urbani a diverso grado di accessibilità consente di evidenziare le numerose opportunità per la localizzazione di attività di eccellenza che si dischiudono a seguito della riduzione dei tempi di spostamento consentita dalle reti AV. In tal senso, l’indicatore proposto può costituire un utile supporto alle decisioni sia per l’attore pubblico consentendo di governare e orientare i processi di trasformazione conseguenti alla realizzazione della rete AV, estendendone i benefici dalle aree di stazione a più ampie porzioni urbane sia per l’investitore privato

  4. Environmental Implications of Radioactive Waste Disposal as Related to Stream Environments; Incidences du Milieu sur l'Elimination des Dechets Radioactifs dans le Voisinage des Cours d'Eau; 0412 041b 0418 042f 0414 ; Efectos de la Evacuacion de Desechos Radiactivos en las Corrientes Fluviales

    Energy Technology Data Exchange (ETDEWEB)

    Straub, Conrad P.; Goldin, Abraham S.; Friend, Albert G.; Taft, Robert A. [Sanitary Engineering Center, US Department of Health, Education and Welfare, Cincinnati, OH (United States)

    1960-07-01

    hay que anadir las sustancias provenientes de la precipitacion radiactiva y las que se depositan directamente en el rio o incorporan a la corriente{sub a} traves de sus afluentes. Como las corrientes fluviales pueden utilizarse con diversos fines: para obtener agua potable, para el consumo industrial, como lugar de recreo, para la pesca, el riego o la navegacion, hay que evaluar cuidadosamente los efectos de la evacuacion en cada uno de los casos mencionados. Los criterios actualmente establecidos no proporcionan una base suficiente para determinar el limite admisible de evacuacion, a no ser que se conozcan las cantidades.de cada radionuclido ya presentes en el agua y su comportamiento al ser arrastrados por la corriente. Habra que modificar los limites admisibles de evacuacion segun estos datos y, sobre todo, segun los fines con que se utilice el rio aguas abajo del punto de descarga. Si en un rio determinado se permite la evacuacion de desechos radiactivos en diferentes puntos, habra que determinar las cantidades maximas correspondientes a cada radionuclido teniendo en cuenta la exposicion de las poblaciones situadas aguas abajo de todos los puntos de descarga. En la memoria se sugieren diversas maneras de abordar el problema de la evacuacion de desechos segun el uso que se hace de la comente aguas abajo del punto de evacuacion, y se examinan las dificultades practicas inherentes a cada una de ellas. (author) [Russian] V nastojashhee vremja ezhegodno v reki popadajut vse v bol'shem kolichestve, radioaktivnye othody. Oni idut iz mnogochislennyh laboratorij, v kotoryh ispol'zujutsja radioaktivnye materialy dlja poleznyh celej, a takzhe iz sushhestvujushhih sredstv ispol'zovanija atomnoj jenergii. K jetomu- kolichestvu, popadajushhemu neposredstvenno v reki pri uslovijah kontrolja, sleduet dobavit' eshhe i radioaktivnye materialy, kotorye javljajutsja sledstviem vypadenija i prosachivanija ili prjamye osadki, popadajushhie v reki. Poskol'ku jeti zhe reki mogut ispol

  5. Detection, fate and inactivation of pathogenic norovirus employing settlement and UV treatment in wastewater treatment facilities

    International Nuclear Information System (INIS)

    Barrett, M.; Fitzhenry, K.; O'Flaherty, V.; Dore, W.; Keaveney, S.; Cormican, M.; Rowan, N.; Clifford, E.

    2016-01-01

    It is accepted that discharged wastewaters can be a significant source of pathogenic viruses in receiving water bodies contributing to pollution and may in turn enter the human food chain and pose a risk to human health, thus norovirus (NoV) is often a predominant cause of gastroenteritis globally. Working with NoV poses particular challenges as it cannot be readily identified and detection by molecular methods does not assess infectivity. It has been proposed that the infectivity of NoV may be modelled through the use of an alternative virus; F-specific RNA (FRNA) bacteriophages; GA genotype and other FRNA bacteriophages have been used as a surrogate in studies of NoV inactivation. This study investigated the efficiency of novel pulsed ultraviolet irradiation and low pressure ultraviolet irradiation as a potential pathogen inactivation system for NoV and FRNA bacteriophage (GA) in secondary treated wastewaters. The role of UV dose and the impact of suspended solids concentration on removal efficiency were also examined. The study also investigated the role of settlement processes in wastewater treatment plants in removing NoV. While NoV inactivation could not be determined it was found that at a maximum UV dose of 6.9 J/cm"2 (6900 mJ/cm"2) an average 2.4 log removal of FRNA bacteriophage (GA) was observed; indicating the potential need for high UV doses to remove NoV if FRNA bacteriophage prove a suitable indicator for NoV. The study found that increasing concentrations of suspended solids impacted on PUV efficiency however, it appears the extent of the impact may be site specific. Furthermore, the study found that settlement processes can play a significant role in the removal of FRNA bacteriophage, thus potentially NoV. - Highlights: • Effectiveness of low pressure UV and novel high-intensity pulsed UV disinfection in NoVs removal. • Reduction of FRNA bacteriophage was seen in clarified wastewater after settling. • Adsorption of viral particles to solids

  6. Characterization of early-age hydration processes in lime-ceramic binders using isothermal calorimetry, X-ray diffraction and scanning electron microscopy

    International Nuclear Information System (INIS)

    Jerman, Miloš; Tydlitát, Vratislav; Keppert, Martin; Čáchová, Monika; Černý, Robert

    2016-01-01

    Highlights: • Early age hydration processes in lime-ceramic binders are analyzed within a wide range of component ratios. • The applied waste ceramic dust exhibits partial hydraulic properties, ettringite and calcite are formed. • Transition from tobermorite- to jennite-like structures is identified by SEM within the first 48 h. • The highest specific hydration heat after 300 h, 63 J/g, is measured for the binder containing 70% ceramic. • Substantial effect of the heat of wetting is observed, ranging from 10 J/g for lime to 3.9 J/g for ceramic. - Abstract: Early-age hydration processes in a lime-ceramic-water system are analyzed within the whole range of possible lime/ceramic ratios. The isothermal calorimetry shows a substantial effect of the heat of wetting on the total heat evolved, ranging from 10 J/g for lime to 3.9 J/g for ceramic. The highest specific hydration heat of 63 J/g during the analyzed 300-h hydration period exhibits the blended binder containing 70% ceramic and 30% lime which correlates well with the highest compressive and bending strengths of the paste prepared using this blend. Portlandite, ettringite and calcite are the main phases identified by the X-ray diffraction analysis after the hydration of ceramic-rich blends. According to the results of scanning electron microscopy, the initial course of pozzolanic reaction is for this type of binders characterized by the transition from tobermorite-like calcium-silicate-hydrate structures into jennite-like structures within the first 48 h. Blends with the ceramic content lower than 70% show a high portion of portlandite, calcite is present in low amount, and the jennite-like structures are observed after 48 h, following the initial formation of components with a very high Ca content. The favorable properties of the ceramic-rich blended binders can be explained by the partial hydraulic character of the ceramic. With the specific hydration heat of 29 J/g after 300 h and compressive strength

  7. Characterization of early-age hydration processes in lime-ceramic binders using isothermal calorimetry, X-ray diffraction and scanning electron microscopy

    Energy Technology Data Exchange (ETDEWEB)

    Jerman, Miloš; Tydlitát, Vratislav; Keppert, Martin; Čáchová, Monika; Černý, Robert, E-mail: cernyr@fsv.cvut.cz

    2016-06-10

    Highlights: • Early age hydration processes in lime-ceramic binders are analyzed within a wide range of component ratios. • The applied waste ceramic dust exhibits partial hydraulic properties, ettringite and calcite are formed. • Transition from tobermorite- to jennite-like structures is identified by SEM within the first 48 h. • The highest specific hydration heat after 300 h, 63 J/g, is measured for the binder containing 70% ceramic. • Substantial effect of the heat of wetting is observed, ranging from 10 J/g for lime to 3.9 J/g for ceramic. - Abstract: Early-age hydration processes in a lime-ceramic-water system are analyzed within the whole range of possible lime/ceramic ratios. The isothermal calorimetry shows a substantial effect of the heat of wetting on the total heat evolved, ranging from 10 J/g for lime to 3.9 J/g for ceramic. The highest specific hydration heat of 63 J/g during the analyzed 300-h hydration period exhibits the blended binder containing 70% ceramic and 30% lime which correlates well with the highest compressive and bending strengths of the paste prepared using this blend. Portlandite, ettringite and calcite are the main phases identified by the X-ray diffraction analysis after the hydration of ceramic-rich blends. According to the results of scanning electron microscopy, the initial course of pozzolanic reaction is for this type of binders characterized by the transition from tobermorite-like calcium-silicate-hydrate structures into jennite-like structures within the first 48 h. Blends with the ceramic content lower than 70% show a high portion of portlandite, calcite is present in low amount, and the jennite-like structures are observed after 48 h, following the initial formation of components with a very high Ca content. The favorable properties of the ceramic-rich blended binders can be explained by the partial hydraulic character of the ceramic. With the specific hydration heat of 29 J/g after 300 h and compressive strength

  8. Evaluation of a novel ventricular support device with defibrillation capabilities in canine and porcine animal models.

    Science.gov (United States)

    Killingsworth, Cheryl R; Rippy, Marian K; Virmani, Renu; Rollins, Dennis L; McGiffin, David C; Ideker, Raymond E

    2008-08-01

    Sudden death is prevalent in heart failure patients. We tested an implantable ventricular support device consisting of a wireform harness with one or two pairs of integrated defibrillation electrode coils. The device was implanted into six pigs (36-44 kg) through a subxiphoid incision. Peak voltage (V) defibrillation thresholds (DFT) were determined for five test configurations compared with a control transvenous lead (RV to CanPect). Defibrillator can location (abdominal or pectoral) and common coil separation on the implant (0 degrees or 60 degrees ) were studied.(.) The DFT for RV60 to LV60 + CanPect was significantly less than control (348 +/- 57 vs 473 +/- 27 V, P < 0.05). The DFTs for other vectors were similar to control except for RV0 to LV0 + CanAbd (608 +/- 159 V). The device was implanted into 12 adult dogs for 42, 90, or 180 days with DFT and pathological examination performed at the terminal study. Cardiac pressures were determined at baseline, after implantation, and at the terminal study. The DFT was also determined in a separate group of four dogs at 42 days following implantation of the support device with one pair of defibrillation electrodes. The DFTs at implant and explant in dogs with one pair (8 +/- 1.5 Joules [J] and 6 +/- 1.9 J) or two pairs (8 +/- 3.4 J and 7 +/- 1.9 J) of defibrillation electrodes were not significantly different from each other but significantly less than control measured at the terminal study (18 +/- 3.4 J). Left-sided pressures were significantly decreased at explant but within expected normal ranges. Right-sided pressures were not different except for RV systolic. Histopathology indicated mild to moderate epicardial inflammation and fibrosis, consistent with a foreign body healing response. This defibrillation-enabled ventricular support system maintained mechanical functionality for up to 6 months while inducing typical chronic healing responses. The DFT was equal to or lower than a standard transvenous vector.

  9. Detection, fate and inactivation of pathogenic norovirus employing settlement and UV treatment in wastewater treatment facilities

    Energy Technology Data Exchange (ETDEWEB)

    Barrett, M. [Microbial Ecology Laboratory, Microbiology, School of Natural sciences, National University of Ireland Galway (Ireland); Ryan Institute, National University of Ireland Galway (Ireland); College of Engineering and Informatics, National University of Ireland Galway (Ireland); Fitzhenry, K. [Ryan Institute, National University of Ireland Galway (Ireland); College of Engineering and Informatics, National University of Ireland Galway (Ireland); O' Flaherty, V. [Microbial Ecology Laboratory, Microbiology, School of Natural sciences, National University of Ireland Galway (Ireland); Ryan Institute, National University of Ireland Galway (Ireland); Dore, W.; Keaveney, S. [Marine Institute, Galway (Ireland); Cormican, M. [Ryan Institute, National University of Ireland Galway (Ireland); Centre for Health from Environment, Ryan Institute, National University of Ireland Galway (Ireland); Rowan, N. [Bioscience Research Institute, Athlone Institute of Technology (Ireland); Clifford, E., E-mail: eoghan.clifford@nuigalway.ie [Ryan Institute, National University of Ireland Galway (Ireland); College of Engineering and Informatics, National University of Ireland Galway (Ireland)

    2016-10-15

    It is accepted that discharged wastewaters can be a significant source of pathogenic viruses in receiving water bodies contributing to pollution and may in turn enter the human food chain and pose a risk to human health, thus norovirus (NoV) is often a predominant cause of gastroenteritis globally. Working with NoV poses particular challenges as it cannot be readily identified and detection by molecular methods does not assess infectivity. It has been proposed that the infectivity of NoV may be modelled through the use of an alternative virus; F-specific RNA (FRNA) bacteriophages; GA genotype and other FRNA bacteriophages have been used as a surrogate in studies of NoV inactivation. This study investigated the efficiency of novel pulsed ultraviolet irradiation and low pressure ultraviolet irradiation as a potential pathogen inactivation system for NoV and FRNA bacteriophage (GA) in secondary treated wastewaters. The role of UV dose and the impact of suspended solids concentration on removal efficiency were also examined. The study also investigated the role of settlement processes in wastewater treatment plants in removing NoV. While NoV inactivation could not be determined it was found that at a maximum UV dose of 6.9 J/cm{sup 2} (6900 mJ/cm{sup 2}) an average 2.4 log removal of FRNA bacteriophage (GA) was observed; indicating the potential need for high UV doses to remove NoV if FRNA bacteriophage prove a suitable indicator for NoV. The study found that increasing concentrations of suspended solids impacted on PUV efficiency however, it appears the extent of the impact may be site specific. Furthermore, the study found that settlement processes can play a significant role in the removal of FRNA bacteriophage, thus potentially NoV. - Highlights: • Effectiveness of low pressure UV and novel high-intensity pulsed UV disinfection in NoVs removal. • Reduction of FRNA bacteriophage was seen in clarified wastewater after settling. • Adsorption of viral particles

  10. Refinement in the structural and magnetic properties of Co{sub 0.5}Ni{sub 0.5}Fe{sub 2}O{sub 4} and its application as laser micro-propellant using ablation confinement

    Energy Technology Data Exchange (ETDEWEB)

    Raza Ahmad, Muhammad, E-mail: mrazaahmad@gmail.com [Centre for Advanced Studies in Physics (CASP), GC University, Lahore, Punjab (Pakistan); Jamil, Yasir, E-mail: yasirjamil@yahoo.com [Department of Physics, University of Agriculture, Faisalabad, Punjab (Pakistan); Tabasuum, Ayesha [Department of Physics, University of Agriculture, Faisalabad, Punjab (Pakistan); Hussain, Tousif [Centre for Advanced Studies in Physics (CASP), GC University, Lahore, Punjab (Pakistan)

    2015-06-15

    The transition metal-substituted cobalt ferrite nanoparticles Co{sub 0.5}X{sub 0.5}Fe{sub 2}O{sub 4} (with X=Cu, Zn, Mn and Ni) exhibit a wide range of properties that result in their application in low loss magnetic core materials, vertical recording heads, antenna rods, memory elements, ferrofluids, biomedical applications, sensors and laser propulsion. Keeping in view its importance we investigated for the first time the structural and magnetic properties of the Co{sub 0.5}Ni{sub 0.5}Fe{sub 2}O{sub 4} samples that were subsequently subjected to thermal treatments for different time durations. The average crystallite sizes of the synthesized samples were found in the range of 24–46 nm. The values of the saturation magnetization and coercivity varied from 25.7 to 31.2 emu/g and 523.59 to 927.62 O{sub e}, respectively. The XRD patterns showed that increase in thermal treatment time resulted in the refinement of the structure whereas the SEM micrographs depicted a uniform particle size distribution of the synthesized material. We also explored the application of the synthesized material as a micro-thruster. It was found that the confinement of the laser induced plasma of Co{sub 0.5}×{sub 0.5}Fe{sub 2}O{sub 4} led to an increase in the value of coupling coefficient from the range of 5.747×10{sup −5}–7.0644×10{sup −5} N-s/J for unconfined to that of 1.41×10{sup −4}–2.68×10{sup −4}N-s/J for confined plasma corresponding to the Nd:YAG laser fluencies of 4×10{sup 9} J/m{sup 2}–6×10{sup 9} J/m{sup 2}. - Highlights: • Thermal treatment modifies the properties of Co{sub 0.5}Ni{sub 0.5}Fe{sub 2}O{sub 4}. • Change in magnetic properties with increase in calcination time. • Confinement increases the laser propulsion parameters of Co{sub 0.5}Ni{sub 0.5}Fe{sub 2}O{sub 4}.

  11. Levels of insecticide resistance to deltamethrin, malathion, and temephos, and associated mechanisms in Aedes aegypti mosquitoes from the Guadeloupe and Saint Martin islands (French West Indies).

    Science.gov (United States)

    Goindin, Daniella; Delannay, Christelle; Gelasse, Andric; Ramdini, Cédric; Gaude, Thierry; Faucon, Frédéric; David, Jean-Philippe; Gustave, Joël; Vega-Rua, Anubis; Fouque, Florence

    2017-02-10

    In the Guadeloupe and Saint Martin islands, Aedes aegypti mosquitoes are the only recognized vectors of dengue, chikungunya, and Zika viruses. For around 40 years, malathion was used as a mosquito adulticide and temephos as a larvicide. Since the European Union banned the use of these two insecticide molecules in the first decade of the 21st century, deltamethrin and Bacillus thuringiensis var. israelensis are the remaining adulticide and larvicide, respectively, used in Guadeloupe. In order to improve the management of vector control activities in Guadeloupe and Saint Martin, we investigated Ae. aegypti resistance to and mechanisms associated with deltamethrin, malathion, and temephos. Ae. aegypti mosquitoes were collected from six different localities of Guadeloupe and Saint Martin. Larvae were used for malathion and temephos bioassays, and adult mosquitoes for deltamethrin bioassays, following World Health Organization recommendations. Knockdown resistance (Kdr) genotyping for V1016I and F1534C mutations, and expression levels of eight enzymes involved in detoxification mechanisms were examined in comparison with the susceptible reference Bora Bora strain. Resistance ratios (RR 50 ) calculated for Ae. aegypti larvae showed high resistance levels to temephos (from 8.9 to 33.1-fold) and low resistance levels to malathion (from 1.7 to 4.4-fold). Adult females displayed moderate resistance levels to deltamethrin regarding the time necessary to affect 50% of individuals, varying from 8.0 to 28.1-fold. Molecular investigations on adult mosquitoes showed high resistant allele frequencies for V1016I and F1534C (from 85 to 96% and from 90 to 98%, respectively), as well as an overexpression of the glutathione S-transferase gene, GSTe2, the carboxylesterase CCEae3a, and the cytochrome genes 014614, CYP6BB2, CYP6M11, and CYP9J23. Ae. aegypti populations from Guadeloupe and Saint Martin exhibit multiple resistance to organophosphates (temephos and malathion), and

  12. Ion assistance effects on electron beam deposited MgF sub 2 films

    CERN Document Server

    Alvisi, M; Della Patria, A; Di Giulio, M; Masetti, E; Perrone, M R; Protopapa, M L; Tepore, A

    2002-01-01

    Thin films of MgF sub 2 have been deposited by the ion-assisted electron-beam evaporation technique in order to find out the ion beam parameters leading to films of high laser damage threshold whose optical properties are stable under uncontrolled atmosphere conditions. It has been found that the ion-assisted electron-beam evaporation technique allows getting films with optical properties (refraction index and extinction coefficient) of high environmental stability by properly choosing the ion-source voltage and current. But, the laser damage fluence at 308 nm was quite dependent on the assisting ion beam parameters. Larger laser damage fluences have been found for the films deposited by using assisting ion beams delivered at lower anode voltage and current values. It has also been found that the films deposited without ion assistance were characterized by the highest laser damage fluence (5.9 J/cm sup 2) and the lowest environmental stability. The scanning electron microscopy analysis of the irradiated areas...

  13. Nonlinear photoluminescence of graded band-gap Al sub x Ga sub 1 sub - sub x As solid solutions

    CERN Document Server

    Kovalenko, V F; Shutov, S V

    2002-01-01

    The dependence of the photoluminescence (PL) intensity of undoped and doped graded band-gap Al sub x Ga sub 1 sub - sub x As (x <= 0.36) solid solutions on the excitation level J (1 x 10 sup 1 sup 9 <= J <= 1 x 10 sup 2 sup 2 quantum cm sup - sup 2 s) for different values of built-in quasi-electrical field E (85 <= E <= 700 V/cm) has been studied. It is found that the dependence of the near-band-edge PL intensity I in the excitation level J at an accelerating action of the field E has a complex character. The nonlinearity of I(J) dependence is explained by contribution of the two-photon absorption of the radiating recombination in the process of its remission. The optimum range of E values (120 <= E <= 200 V/cm) providing the greatest contribution of the two-photon absorption in the reemission in undoped solid solutions is determined

  14. Microstructure and mechanical properties of metal/oxide and metal/silicide interfaces

    International Nuclear Information System (INIS)

    Shaw, L.; Miracle, D.; Abbaschian, R.

    1995-01-01

    Fracture energies of Al 2 O 3 /Nb interfaces and MoSi 2 /Nb interfaces with and without Al 2 O 3 coating were measured using sandwich-type chevron-notched specimens. The relations between the mechanical properties, microstructures, types of bonds at the interface and processing routes were explored. The fracture energy of the Al 2 O 3 /Nb interface was determined to be 9 J/m 2 and changed to 16 J/m 2 when Nb was pre-oxidized before the formation of the Al 2 O 3 /Nb interface. The fracture energy of the MoSi 2 /Nb interface could not be determined directly because of the formation of the interfacial compounds. However, the fracture energy at the MoSi 2 /Nb interfacial region was found to depend on the interfacial bond strength, roughness of interfaces and microstructure of interfacial compounds. The interfacial fracture energies of Al 2 O 3 with silicides, MoSi 2 , Nb 5 Si 3 , or (Nb, Mo)Si 2 were estimated to be about 16 J/m 2 , while the interfacial fracture energies between two silicides or between Nb and a silicide were larger than 34 J/m 2 . The measured fracture energies between two silicides or between Nb and a silicide were larger than 34 J/m 2 . The measured fracture energies of the various interfaces are discussed in terms of the interfacial microstructures and types of bonds at the interfaces

  15. Ultraviolet Radiation Increases the Toxicity of Pyrene, 1-Aminopyrene and 1-Hydroxypyrene to Human Keratinocytes

    Directory of Open Access Journals (Sweden)

    Huey-Min Hwang

    2005-04-01

    Full Text Available Over the past several years, a great deal of interest has been focused on the harmful effects of ultraviolet (UV radiation to human skin. UV light has been implicated in aging, sunburn and skin cancer. Few studies, however, have been done to determine the effects that UV light, in conjunction with other environmental contaminants, may have on human skin. Polycyclic Aromatic Hydrocarbons (PAHs are a class of compounds that have been reported to be toxic, mutagenic and carcinogenic to many eukaryotic organisms. UV light is also known to increase the toxicity of PAHs through photo-activation and photo-modification. The purpose of this study was to assess the effects of UV-A irradiated pyrene (Pyr, 1-aminopyrene (1-AP and 1-hydroxypyrene (1-HP on human keratinocytes, the skin primary site of UV irradiated PAH exposure. Our findings indicate that simultaneous treatment of human keratinocyte cell line, HaCaT, with 1.0μg/ml pyrene, 1-AP or 1-HP and 3.9 J/cm2/min UV-A light resulted in significant inhibition of cell proliferation. Approximately 100% of the cells died in the case of UV-A irradiated 1-AP and 1-HP. In the case of UV-A irradiated pyrene, more than 70% of the cells died, indicating that UV-A is able to transform these PAHs into more harmful intermediates.

  16. High Discharge Energy Density at Low Electric Field Using an Aligned Titanium Dioxide/Lead Zirconate Titanate Nanowire Array.

    Science.gov (United States)

    Zhang, Dou; Liu, Weiwei; Guo, Ru; Zhou, Kechao; Luo, Hang

    2018-02-01

    Polymer-based capacitors with high energy density have attracted significant attention in recent years due to their wide range of potential applications in electronic devices. However, the obtained high energy density is predominantly dependent on high applied electric field, e.g., 400-600 kV mm -1 , which may bring more challenges relating to the failure probability. Here, a simple two-step method for synthesizing titanium dioxide/lead zirconate titanate nanowire arrays is exploited and a demonstration of their ability to achieve high discharge energy density capacitors for low operating voltage applications is provided. A high discharge energy density of 6.9 J cm -3 is achieved at low electric fields, i.e., 143 kV mm -1 , which is attributed to the high relative permittivity of 218.9 at 1 kHz and high polarization of 23.35 µC cm -2 at this electric field. The discharge energy density obtained in this work is the highest known for a ceramic/polymer nanocomposite at such a low electric field. The novel nanowire arrays used in this work are applicable to a wide range of fields, such as energy harvesting, energy storage, and photocatalysis.

  17. Various categories of defects after surface alloying induced by high current pulsed electron beam irradiation

    Energy Technology Data Exchange (ETDEWEB)

    Luo, Dian [State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001 (China); Tang, Guangze, E-mail: oaktang@hit.edu.cn [School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001 (China); Ma, Xinxin [State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001 (China); Gu, Le [School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001 (China); Sun, Mingren [School of Material Science & Engineering, Harbin Institute of Technology, Harbin 150001 (China); Wang, Liqin [School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001 (China)

    2015-10-01

    Highlights: • Four kinds of defects are found during surface alloying by high current electron beam. • Exploring the mechanism how these defects appear after irradiation. • Increasing pulsing cycles will help to get good surface quality. • Choosing proper energy density will increase surface quality. - Abstract: High current pulsed electron beam (HCPEB) is an attractive advanced materials processing method which could highly increase the mechanical properties and corrosion resistance. However, how to eliminate different kinds of defects during irradiation by HCPEB especially in condition of adding new elements is a challenging task. In the present research, the titanium and TaNb-TiW composite films was deposited on the carburizing steel (SAE9310 steel) by DC magnetron sputtering before irradiation. The process of surface alloying was induced by HCPEB with pulse duration of 2.5 μs and energy density ranging from 3 to 9 J/cm{sup 2}. Investigation of the microstructure indicated that there were several forms of defects after irradiation, such as surface unwetting, surface eruption, micro-cracks and layering. How the defects formed was explained by the results of electron microscopy and energy dispersive spectroscopy. The results also revealed that proper energy density (∼6 J/cm{sup 2}) and multi-number of irradiation (≥50 times) contributed to high quality of alloyed layers after irradiation.

  18. Os conflitos conjugais na perspectiva dos filhos

    Directory of Open Access Journals (Sweden)

    Viviane Ribeiro Goulart

    2013-01-01

    Full Text Available Se investigó sobre la perspectiva de los hijos en los conflictos conyugales. Participaron 17 estudiantes de una escuela pública de Porto Alegre (RS, de ambos sexos, reunidos en dos grupos focales: uno con 8 niños (8-9 años, y otro con 9 jóvenes (12-13 años, que vivían con sus padres. Cada grupo ha tenido sólo una cita en la escuela. Las informaciones fueron grabadas, transcritas y el contenido analizado a partir de los temas emergentes. De acuerdo con los niños, los conflictos conyugales van desde una discusión hasta la agresión física, son recurrientes, versan sobre cualquier tema, y su expresión es predominantemente negativa. Los niños reconocen la existencia del conflicto pero ni siempre entienden sus causas y todavía sufren sus consecuencias. Los niños adoptan distintas estrategias para lidiar con los conflictos, desde ignorarlos hasta las actitudes autodestructivas. Se concluye que los sujetos son conscientes de los conflictos conyugales de sus padres y reconocen sus repercusiones.

  19. Regional new energy vision formulation survey for Ochi Town. Report; 2001 nendo Ouchi cho chiiki shin energy vision sakutei chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-02-01

    For promoting the introduction of new energy and for elevating people's consciousness of such in Ochi Town, Saga Prefecture, surveys and studies were conducted involving the amount of energy needed by the town, the amount of new energy resources in existence, and new energy introduction programs, and a vision was formulated. The demand for energy of the town is estimated at 613,575 times 10{sup 9} J, with the industrial sector responsible for 47.7%, the transportation sector for 26.6%, and the residential and commercial sector for 25.7%. Electric power, heavy oil, gas oil, gasoline, and kerosene are demanded, named in the descending order in terms of magnitude of demand. Key projects were discussed for new energy introduction, which included the introduction of photovoltaic power into a culture exchange center; nighttime illumination of Mikaeri Waterfall by micro-scale hydroelectric power; installation of a water purification system for the Ikisa Dam using photovoltaic power and micro-scale hydroelectric power; introduction of photovoltaic power into a comprehensive sports park and the Ochi Junior High School; and large-scale agricultural production and processing plant operation using photovoltaic power. (NEDO)

  20. Analysis of photodynamic cream effect in dental caries using optical coherence tomography

    Science.gov (United States)

    Barbosa, P. S.; Freitas, A. Z.; de Sant´Anna, G. R.

    2015-06-01

    The aim of this study was to assess the effect in the enamel demineralization of low-intensity infrared laser (λ=810 nm, 100 mW/cm2, 90 sec, 4.47 J/cm2, 9 J) with or without photodynamic cream fluorinated or not fluorinated, using Optical Coherence Tomography (OCT). Background data: Lasers can be used as tools for the prevention of tooth enamel demineralization. All enamel specimens (n= 105) were analyzed using OCT at baseline, and randomly assigned into seven groups (n=15): C (+), laser application; C(-), no treatment; (F), acid fluoride gel; cream (IV); cream and neutral fluoride (IVF); cream and laser (IVL); and cream with neutral fluoride+ laser (IVFL). The specimens were submitted to all kind of treatments before demineralizing pH cycling challenge and were reanalyzed. ANOVA and Tukey's multiple comparative analysis (p <0.01) demonstrated a greater delta attenuation between baseline and post challenge for C + (0.034 +/- 0.011) compared to IVF (0.016 +/- 0.007) F (0.018 +/- 0.010) IVFL (0.019 +/- 0.008), and IVL (0.014 +/- 0.010). The cream laser group (IVL) also showed lower delta (0.014 +/- 0.010) compared to C - (0.025 +/- 0.008). The OCT technique demonstrated that cream associated with laser showed the lowest quantitative enamel mineral looses after cariogenic challenge.

  1. Molecular Docking Analysis of Ginger Active Compound on Transient Receptor Potential Cation Channel Subfamily V Member 1 (TRPV1

    Directory of Open Access Journals (Sweden)

    Fifteen Aprila Fajrin

    2018-02-01

    Full Text Available Ginger had been reported to ameliorate painful diabetic neuropathy (PDN in an animal model. Gingerol and shogaol were active compounds of ginger that potentially act on transient receptor potential cation channel subfamily V member 1 (TRPV1, a key receptor in PDN. This study aims to predict the binding of gingerol and shogaol to TRPV1 using an in silico model. The ligands of the docking study were 3 chemical compounds of each gingerol and shogaol, i.e. 6-shogaol, 8-shogaol, 10-shogaol, 6-gingerol, 8 gingerol and 10-gingerol. Capsaicin, a TRPV1 agonist, was used as a native ligand. The TRPV1 structure was taken from Protein Data Bank (ID 3J9J. The docking analysis was performed using Autodock Vina. The result showed that among the ginger active compounds, 6-shogaol had the strongest binding energy (-7.10 kcal/mol to TRPV1. The 6-shogaol lacked the potential hydrogen bond to Ile265 of TRPV1 protein, which capsacin had. However, it's binding energy towards TRPV1 was not significantly different compared to capsaicin. Therefore, 6-shogaol had potential to be developed as a treatment for PDN.

  2. Reconstruction of the erythemal UV radiation data in Novi Sad (Serbia) using the NEOPLANTA parametric model

    Science.gov (United States)

    Malinovic-Milicevic, S.; Mihailovic, D. T.; Radovanovic, M. M.

    2015-07-01

    This paper focuses on the development and application of a technique for filling the daily erythemal UV dose data gaps and the reconstruction of the past daily erythemal UV doses in Novi Sad, Serbia. The technique implies developing the empirical equation for estimation of daily erythemal UV doses by means of relative daily sunshine duration under all sky conditions. A good agreement was found between modeled and measured values of erythemal UV doses. This technique was used for filling the short gaps in the erythemal UV dose measurement series (2003-2009) as well as for the reconstruction of the past time-series values (1981-2002). Statistically significant positive erythemal UV dose trend of 6.9 J m-2 per year was found during the period 1981-2009. In relation to the reference period 1981-1989, an increase in the erythemal UV dose of 6.92 % is visible in the period 1990-1999 and the increase of 9.67 % can be seen in the period 2000-2009. The strongest increase in erythemal UV doses has been found for winter and spring seasons.

  3. Difficulties Review Atlas Booster Airborne and Ground Support Systems. Book 2. General Information. Volume 7. Hydraulic System Airborne Difficulties Review

    Science.gov (United States)

    1966-08-15

    4 NoOKf 6- p It -: a. ow "IIn$-m j j Ad x V i w’ p. S . J S- w IV- ; I p.. S. . W Cu . VC CE K4 .9 w I Ut I OPm so 4 go le * *2oIt c:~ V hh at ~ tD a...04 v ~ 49 he 44 w.9 . j -j Z; U op 9- ii fI U Sb td a .10 6S* be es1 A a I 2I6 0 1 21ý ii 0 a 4 hi J - o 49w b. X U,1 U U b.- a W b- V -dI v *2 ot 3...0 %all 0 Id .400 c3£~ ’ 7-W .4 0. W Id IN .4151ith 4~I I WX. U3 4 ~ ~ ~ ~ 6 143 . aId £ - 4bd 1 00 a:as 141 -v . -~ ~I& ;: . me le le v IWO. bi 0 O SI

  4. The use of green waste from tourist attractions for renewable energy production: The potential and policy implications

    International Nuclear Information System (INIS)

    Shi, Yan; Du, Yuanyuan; Yang, Guofu; Tang, Yuli; Fan, Likun; Zhang, Jun; Lu, Yijun; Ge, Ying; Chang, Jie

    2013-01-01

    Quantifying potential renewable energy sources from tourist attractions is a pivotal initial step in developing energy policies and strategies for low-carbon tourist industry development. Although solar energy and wind power have been in use for providing power for tourist attractions, the value of using waste biomass for energy production is still poorly understood. Here we advocate a promising approach that produces energy from green waste created by tourism attractions currently existing in large numbers and is still increasing dramatically. Using the Yangtze River Delta (YRD) of China as an example, we evaluated the potential of utilizing green waste to produce energy from 385 tourist attractions in 16 cities of this region. Our results showed that the total potential energy production using the green waste biomass was estimated at 6740 TJ/yr (1 TJ=10 12 J) with an average of 137 GJ/ha/yr (1 GJ=10 9 J), accounting for 6% (the average of the Yangtze River Delta, some scenic areas up to 93%) of YRD′s tourism industry′s energy consumption in 2008. The use of green waste for energy production is possible using current technology and could result in a win–win approach by reducing waste and increasing the renewable energy yields. -- Highlights: •Green waste from tourist attractions could help offset the tourist′s fossil fuel consumption. •Economic, technical, and social feasibility analysis of green waste for energy production. •Puts forward policy recommendations, from management regulations, public support etc

  5. The heat-capacity of ilmenite and phase equilibria in the system Fe-T-O

    Science.gov (United States)

    Anovitz, Lawrence M.; Treiman, A.H.; Essene, E.J.; Hemingway, B.S.; Westrum, E.F.; Wall, V.J.; Burriel, R.; Bohlen, S.R.

    1985-01-01

    Low temperature adiabatic calorimetry and high temperature differential scanning calorimetry have been used to measure the heat-capacity of ilmenite (FeTiO3) from 5 to 1000 K. These measurements yield S2980 = 108.9 J/(mol ?? K). Calculations from published experimental data on the reduction of ilmenite yield ??2980(I1) = -1153.9 kJ/(mol ?? K). These new data, combined with available experimental and thermodynamic data for other phases, have been used to calculate phase equilibria in the system Fe-Ti-O. Calculations for the subsystem Ti-O show that extremely low values of f{hook}O2 are necessary to stabilize TiO, the mineral hongquiite reported from the Tao district in China. This mineral may not be TiO, and it should be re-examined for substitution of other elements such as N or C. Consideration of solid-solution models for phases in the system Fe-Ti-O allows derivation of a new thermometer/oxybarometer for assemblages of ferropseudobrookite-pseudobrookitess and hematite-ilmenitess. Preliminary application of this new thermometer/oxybarometer to lunar and terrestrial lavas gives reasonable estimates of oxygen fugacities, but generally yields subsolidus temperatures, suggesting re-equilibration of one or more phases during cooling. ?? 1985.

  6. Orbifolds of M-theory and type II string theories in two dimensions

    International Nuclear Information System (INIS)

    Roy, S.

    1997-01-01

    We consider several orbifold compactifications of M-theory and theircorresponding type II duals in two space-time dimensions. In particular, we show that while the orbifold compactification of M-theory on T 9 /J 9 is dual to the orbifold compactification of type IIB string theory on T 8 /I 8 , the same orbifold T 8 /I 8 of type IIA string theory is dual to M-theory compactified on a smooth product manifold K3 x T 5 . Similarly, while the orbifold compactification of M-theory on (K3 x T 5 )/σ. J 5 is dual to the orbifold compactification of type IIB string theory on (K3 x T 4 )/σ.I 4 , the same orbifold of type IIA string theory is dual to the orbifold T 4 x (K3 x S 1 )/σ.J 1 of M-theory. The spectrum of various orbifold compactifications of M-theory and type II string theories on both sides are compared giving evidence in favor of these duality conjectures. We also comment on a connection between the Dasgupta-Mukhi-Witten conjecture and the Dabholkar-Park-Sen conjecture for the six-dimensional orbifold models of type IIB string theory and M-theory. (orig.)

  7. Stability tests of the Westinghouse coil in the International Fusion Superconducting Magnet Test Facility

    International Nuclear Information System (INIS)

    Dresner, L.; Fehling, D.T.; Lubell, M.S.; Lue, J.W.; Luton, J.N.; McManamy, T.J.; Shen, S.S.; Wilson, C.T.

    1987-09-01

    The Westinghouse coil is one of three forced-flow coils in the six-coil toroidal array of the International Fusion Superconducting Magnet Test Facility at Oak Ridge National Laboratory. It is wound with an 18-kA, Nb 3 Sn/Cu, cable-in-conduit superconductor structurally supported by aluminum plates and cooled by 4-K, 15-atm supercritical helium. The coil is instrumented to permit measurement of helium temperature, pressure, and flow rate; structure temperature and strain; field; and normal zone voltage. A resistive heater has been installed to simulate nuclear heating, and inductive heaters have been installed to facilitate stability testing. The coil has been tested both individually and in the six-coil array. The tests covered charging to full design current and field, measuring the current-sharing threshold temperature using the resistive heaters, and measuring the stability margin using the pulsed inductive heaters. At least one section of the conductor exhibits a very broad resistive transition (resistive transition index = 4). The broad transition, though causing the appearance of voltage at relatively low temperatures, does not compromise the stability margin of the coil, which was greater than 1.1 J/cm 3 of strands. In another, nonresistive location, the stability margin was between 1.7 and 1.9 J/cm 3 of strands. The coil is completely stable in operation at 100% design current in both the single- and six-coil modes

  8. Calcium D-saccharate

    DEFF Research Database (Denmark)

    Garcia, André Castilho; Hedegaard, Martina Vavrusova; Skibsted, Leif Horsfelt

    2016-01-01

    Molar conductivity of saturated aqueous solutions of calcium d-saccharate, used as a stabilizer of beverages fortified with calcium d-gluconate, increases strongly upon dilution, indicating complex formation between calcium and d-saccharate ions, for which, at 25 °C, Kassoc = 1032 ± 80, ΔHassoc......° = -34 ± 6 kJ mol-1, and ΔSassoc° = -55 ± 9 J mol-1 K-1, were determined electrochemically. Calcium d-saccharate is sparingly soluble, with a solubility product, Ksp, of (6.17 ± 0.32) × 10-7 at 25 °C, only moderately increasing with the temperature: ΔHsol° = 48 ± 2 kJ mol-1, and ΔSassoc° = 42 ± 7 J mol-1...... K-1. Equilibria in supersaturated solutions of calcium d-saccharate seem only to adjust slowly, as seen from calcium activity measurements in calcium d-saccharate solutions made supersaturated by cooling. Solutions formed by isothermal dissolution of calcium d-gluconate in aqueous potassium d...

  9. Characterization of the protective capacity of flooring systems using force-deflection profiling.

    Science.gov (United States)

    Glinka, Michal N; Karakolis, Thomas; Callaghan, Jack P; Laing, Andrew C

    2013-01-01

    'Safety floors' aim to decrease the risk of fall-related injuries by absorbing impact energy during falls. Ironically, excessive floor deflection during walking or standing may increase fall risk. In this study we used a materials testing system to characterize the ability of a range of floors to absorb energy during simulated head and hip impacts while resisting deflection during simulated single-leg stance. We found that energy absorption for all safety floors (mean (SD)=14.8 (4.9)J) and bedside mats (25.1 (9.3)J) was 3.2- to 5.4-fold greater than the control condition (commercial carpet). While footfall deflections were not significantly different between safety floors (1.8 (0.7)mm) and the control carpet (3.7 (0.6)mm), they were significantly higher for two bedside mats. Finally, all of the safety floors, and two bedside mats, displayed 3-10 times the energy-absorption-to-deflection ratios observed for the baseline carpet. Overall, these results suggest that the safety floors we tested effectively addressed two competing demands required to reduce fall-related injury risk; namely the ability to absorb substantial impact energy without increasing footfall deflections. This study contributes to the literature suggesting that safety floors are a promising intervention for reducing fall-related injury risk in older adults. Copyright © 2012 IPEM. Published by Elsevier Ltd. All rights reserved.

  10. Water-Vapor Raman Lidar System Reaches Higher Altitude

    Science.gov (United States)

    Leblanc, Thierry; McDermid, I. Stewart

    2010-01-01

    A Raman lidar system for measuring the vertical distribution of water vapor in the atmosphere is located at the Table Mountain Facility (TMF) in California. Raman lidar systems for obtaining vertical water-vapor profiles in the troposphere have been in use for some time. The TMF system incorporates a number of improvements over prior such systems that enable extension of the altitude range of measurements through the tropopause into the lower stratosphere. One major obstacle to extension of the altitude range is the fact that the mixing ratio of water vapor in the tropopause and the lower stratosphere is so low that Raman lidar measurements in this region are limited by noise. Therefore, the design of the TMF system incorporates several features intended to maximize the signal-to-noise ratio. These features include (1) the use of 355-nm-wavelength laser pulses having an energy (0.9 J per pulse) that is high relative to the laser-pulse energy levels of prior such systems, (2) a telescope having a large aperture (91 cm in diameter) and a narrow field of view (angular width .0.6 mrad), and (3) narrow-bandpass (wavelength bandwidth 0.6 nm) filters for the water-vapor Raman spectral channels. In addition to the large-aperture telescope, three telescopes having apertures 7.5 cm in diameter are used to collect returns from low altitudes.

  11. Mechanistic comparison of pulse laser induced phase separation of particulates from cellulose paper at 213 nm and 532 nm

    Energy Technology Data Exchange (ETDEWEB)

    Arif, S.; Forster, M.; Kautek, W. [University of Vienna, Department of Physical Chemistry, Wien (Austria); Bushuk, S.; Kouzmouk, A.; Tatur, H.; Batishche, S. [National Academy of Sciences of the Republic of Belarus, Institute of Physics, Minsk (Belarus)

    2013-02-15

    The laser-induced phase separation of charcoal particles on additive-free cotton linters cellulose paper was investigated by electron and optical microscopy, colorimetry, and diffuse reflectance FT-IR. The fibre bundles were vaporised in depth of several 10 {mu}m above destruction fluence thresholds using visible 532 nm radiation. This is in contrast to mid-ultraviolet 213 nm radiation, where only the top fibre bundles were modified and partially evaporated. The colorimetric lightness results generally represented the cleaning status, whereas the colorimetric yellowing data represented irreversible chemical and/or photochemical changes. Charcoal-contaminated paper treated with visible and mid-ultraviolet radiation exhibited yellowing, whereas uncontaminated did not. This suggests that the electron-rich plasma generated by the evaporation of the particles heats the adjacent substrate and also excludes oxygen. Mid-ultraviolet, in contrast to visible radiation, shows particle removal always accompanied by paper destruction. IR spectroscopy results suggest cross-linking by ether bonds near the destruction threshold, but do not prove the formation of oxidation products and double bonds as the basis of the yellowing. A ''cleaning window'' between the cleaning threshold (0.1 J/cm{sup 2}) and the paper destruction threshold (2.9 J/cm{sup 2}) with a pulse number of 2 is provided by visible 532 nm laser treatment. (orig.)

  12. Mechanistic comparison of pulse laser induced phase separation of particulates from cellulose paper at 213 nm and 532 nm

    International Nuclear Information System (INIS)

    Arif, S.; Forster, M.; Kautek, W.; Bushuk, S.; Kouzmouk, A.; Tatur, H.; Batishche, S.

    2013-01-01

    The laser-induced phase separation of charcoal particles on additive-free cotton linters cellulose paper was investigated by electron and optical microscopy, colorimetry, and diffuse reflectance FT-IR. The fibre bundles were vaporised in depth of several 10 μm above destruction fluence thresholds using visible 532 nm radiation. This is in contrast to mid-ultraviolet 213 nm radiation, where only the top fibre bundles were modified and partially evaporated. The colorimetric lightness results generally represented the cleaning status, whereas the colorimetric yellowing data represented irreversible chemical and/or photochemical changes. Charcoal-contaminated paper treated with visible and mid-ultraviolet radiation exhibited yellowing, whereas uncontaminated did not. This suggests that the electron-rich plasma generated by the evaporation of the particles heats the adjacent substrate and also excludes oxygen. Mid-ultraviolet, in contrast to visible radiation, shows particle removal always accompanied by paper destruction. IR spectroscopy results suggest cross-linking by ether bonds near the destruction threshold, but do not prove the formation of oxidation products and double bonds as the basis of the yellowing. A ''cleaning window'' between the cleaning threshold (0.1 J/cm 2 ) and the paper destruction threshold (2.9 J/cm 2 ) with a pulse number of 2 is provided by visible 532 nm laser treatment. (orig.)

  13. Bone repair of the periapical lesions treated or not with low intensity laser ({lambda} = 904 nm).(An X-ray study in human); Reparacao ossea de lesoes perirradiculares tratadas ou nao com lasers em baixa intensidade ({lambda}=904 nm). Estudo radiografico em humanos

    Energy Technology Data Exchange (ETDEWEB)

    Sousa, Gerdal Roberto de

    2001-07-01

    The purpose of this study was to evaluate the influence of low intensity laser on the bone repair over periapical lesions of dental elements. Fifteen patients with a total of eighteen periapical lesions were selected and divided into two groups. Lesions of the control group were submitted to endodontic treatment and/or periapical surgery and the lesions of the experimental laser group, were submitted to the same procedures of the first group but also irradiated by low intensity laser. It was used a 904 nm wavelength laser GaAs, employing 11 mW of power delivered by a fiber optic system, irradiation continuos and contact mode, using a fluency of 9 J/cm{sup 2}. The mentioned treatment was repeated for 10 sessions with intervals of 72 hours between each session. Bone repair was evaluated through lesion measurements, which were accessed from the X ray pictures using a time and then, were also statistically analyzed. Results showed a significant difference between lased and control groups (p<0,10), emphasizing that for the laser group presented a significant reduction of the lesions area, confirmed by X ray. (author)

  14. Bone repair of the periapical lesions treated or not with low intensity laser (λ = 904 nm).(An X-ray study in human)

    International Nuclear Information System (INIS)

    Sousa, Gerdal Roberto de

    2001-01-01

    The purpose of this study was to evaluate the influence of low intensity laser on the bone repair over periapical lesions of dental elements. Fifteen patients with a total of eighteen periapical lesions were selected and divided into two groups. Lesions of the control group were submitted to endodontic treatment and/or periapical surgery and the lesions of the experimental laser group, were submitted to the same procedures of the first group but also irradiated by low intensity laser. It was used a 904 nm wavelength laser GaAs, employing 11 mW of power delivered by a fiber optic system, irradiation continuos and contact mode, using a fluency of 9 J/cm 2 . The mentioned treatment was repeated for 10 sessions with intervals of 72 hours between each session. Bone repair was evaluated through lesion measurements, which were accessed from the X ray pictures using a time and then, were also statistically analyzed. Results showed a significant difference between lased and control groups (p<0,10), emphasizing that for the laser group presented a significant reduction of the lesions area, confirmed by X ray. (author)

  15. In Vitro Antimicrobial Photodynamic Therapy Against Trichophyton mentagrophytes Using New Methylene Blue as the Photosensitizer.

    Science.gov (United States)

    López-Chicón, P; Gulías, Ò; Nonell, S; Agut, M

    2016-11-01

    Antimicrobial photodynamic therapy combines the use of a photosensitizing drug with light and oxygen to eradicate pathogens. Trichophyton mentagrophytes is a dermatophytic fungus able to invade the skin and keratinized tissues. We have investigated the use of new methylene blue as the photosensitizing agent for antimicrobial photodynamic therapy to produce the in vitro inactivation of T mentagrophytes. A full factorial design was employed to optimize the parameters for photoinactivation of the dermatophyte. The parameters studied were new methylene blue concentration, contact time between the photosensitizing agent and the fungus prior to light treatment, and the fluence of red light (wavelength, 620-645nm) applied. The minimum concentration of new methylene blue necessary to induce the death of all T. mentagrophytes cells in the initial suspension (approximate concentration, 10 6 colony forming units per milliliter) was 50μM for a fluence of 81J/cm 2 after a contact time of 10minutes with the photosensitizing-agent. Increasing the concentration to 100μM allowed the fluence to be decreased to 9J/cm 2 . Comparison of our data with other published data shows that the susceptibility of T. mentagrophytes to antimicrobial photodynamic therapy with new methylene blue is strain-dependent. New methylene blue is a photosensitizing agent that should be considered for the treatment of fungal skin infections caused by this dermatophyte. Copyright © 2016 AEDV. Publicado por Elsevier España, S.L.U. All rights reserved.

  16. A Minkowski Fractal Circularly Polarized Antenna for RFID Reader

    Directory of Open Access Journals (Sweden)

    Yanzhong Yu

    2014-11-01

    Full Text Available A design of fractal-like antenna with circular polarization for radio frequency identification (RFID reader applications is presented in this article. The modified Minkowski fractal structure is adopted as radiating patch for size reduction and broadband operation. A corner-truncated technology and a slot-opened method are employed to realize circular polarization and improve the gain of the proposed antenna, respectively. The proposed antenna is analyzed and optimized by HFSS. Return loss and maximum gain of the optimized antenna achieve to -22.2 dB and 1.12 dB at 920 MHz, respectively. The optimized design has an axial ratio (AR of 1.2 dB at central frequency of 920 MHz and impedance bandwidth (S11<=-10 dB of 40 MHz (4.3 %. Its input impedance is (57.9-j2.6 W that is close to input impedance of coaxial line (50 W. Numerical results demonstrate that the optimized antenna exhibits acceptable performances and may satisfy requirements of RFID reader applications.

  17. Thermochemical characteristics of La n+1Ni nO3n+1 oxides

    International Nuclear Information System (INIS)

    Bannikov, D.O.; Safronov, A.P.; Cherepanov, V.A.

    2006-01-01

    Lanthanum nickelates: La 2 NiO 4+δ , La 3 Ni 2 O 7-δ , La 4 Ni 3 O 10-δ and LaNiO 3-δ the members of Ruddlesden-Popper series La n+1 Ni n O 3n+1 were prepared using citrate route. Dissolution enthalpies of complex oxides as well as a number of subsidiary substances were measured by means of Calvet calorimeter in 1 M solution of hydrochloric acid at 25 deg. C. The dissolution scheme of complex oxides in hydrochloric acid was proposed and enthalpies of formation of the complex oxides from binary oxides were calculated considering oxygen nonstoichiometry of these substances. Enthalpies of step-by-step oxidation were evaluated. Partial enthalpy contribution of LaO layers was calculated endothermic equals to 30.9 J/mol while partial enthalpy contribution of perovskite LaNiO 3 layers was negative equals to -97.0 J/mol. Enthalpy of formation of any complex oxide of Ruddlesden-Popper series fits very well to the linear regression based on these values

  18. Magnetocaloric effect in In doped YbMnO{sub 3}

    Energy Technology Data Exchange (ETDEWEB)

    Sattibabu, Bhumireddi, E-mail: bsb.satti@gmail.com [School of Engineering Sciences and Technology, University of Hyderabad, Hyderabad 500046 (India); Department of Electronics and Physics, Institute of Science, GITAM University, Visakhapatnam 530045 (India); Bhatnagar, A.K., E-mail: anilb42@gmail.com [School of Physics, University of Hyderabad, Hyderabad 500046 (India); Vinod, K.; Mani, Awadhesh [Condensed Matter Physics Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India)

    2017-06-01

    Magnetic and magnetocaloric (MCE) properties of Yb{sub 0.9}In{sub 0.1}MnO{sub 3} and Yb{sub 0.8}In{sub 0.2}MnO{sub 3} polycrystalline samples are presented in this paper. Isothermal magnetization measurements reveal a field induced magnetic transition. Magnetic entropy change of 2.34±0.35 J/mole-K for Yb{sub 0.9}In{sub 0.1}MnO{sub 3} and 2.64±0.38 J/mole-K for Yb{sub 0.8}In{sub 0.2}MnO{sub 3} field change ΔH =10 KOe is observed around the ferromagnetic ordering temperature of Yb{sup 3+}. Values of relative cooling power for the same field change are found to be 38.03±9 J /mol, and 40.90±10 J/mol for Yb{sub 0.9}In{sub 0.1}MnO{sub 3} and Yb{sub 0.8}In{sub 0.2}MnO{sub 3}, respectively. These values suggest In doped YbMnO{sub 3} may be a potential candidate for magnetic refrigerant at low temperatures.

  19. Application of Auxetic Foam in Sports Helmets

    Directory of Open Access Journals (Sweden)

    Leon Foster

    2018-03-01

    Full Text Available This investigation explored the viability of using open cell polyurethane auxetic foams to augment the conformable layer in a sports helmet and improve its linear impact acceleration attenuation. Foam types were compared by examining the impact severity on an instrumented anthropomorphic headform within a helmet consisting of three layers: a rigid shell, a stiff closed cell foam, and an open cell foam as a conformable layer. Auxetic and conventional foams were interchanged to act as the helmet’s conformable component. Attenuation of linear acceleration was examined by dropping the combined helmet and headform on the front and the side. The helmet with auxetic foam reduced peak linear accelerations (p < 0.05 relative to its conventional counterpart at the highest impact energy in both orientations. Gadd Severity Index reduced by 11% for frontal impacts (38.9 J and 44% for side impacts (24.3 J. The conformable layer within a helmet can influence the overall impact attenuating properties. The helmet fitted with auxetic foam can attenuate impact severity more than when fitted with conventional foam, and warrants further investigation for its potential to reduce the risk of traumatic brain injuries in sport specific impacts.

  20. Preparation and Characterization of PbO-SrO-Na2O-Nb2O5-SiO2 Glass Ceramics Thin Film for High-Energy Storage Application

    Science.gov (United States)

    Tan, Feihu; Zhang, Qingmeng; Zhao, Hongbin; Wei, Feng; Du, Jun

    2018-03-01

    PbO-SrO-Na2O-Nb2O5-SiO2 (PSNNS) glass ceramic thin films were prepared by pulsed laser deposition technology on heavily doped silicon substrates. The influence of annealing temperatures on microstructures, dielectric properties and energy storage performances of the as-prepared films were investigated in detail. X-ray diffraction studies indicate that Pb2Nb2O7 crystallizes at 800°C and disappears at 900°C, while NaNbO3 and PbNb2O6 are formed at the higher temperature of 900°C. The dielectric properties of the glass ceramics thin films have a strong dependence on the phase assemblages that are developed during heat treatment. The maximum dielectric constant value of 171 was obtained for the film annealed at 800°C, owing to the high electric breakdown field strength, The energy storage densities of the PSNNS films annealed at 800°C were as large as 36.9 J/cm3, These results suggest that PSNNS thin films are promising for energy storage applications.

  1. Station Climatic Summaries, North America. Volume 2. Alaska, Canada and Greenland

    Science.gov (United States)

    1993-02-01

    36 IZ50 NNE 13 5$ 9 J7 1 4 17 11 a a 13 4 ISO NNE 4 52 9 1 21 1 41 19. :5 :S 10 1, 𔃻:: Z. 1:9 1 4ý1 11 1 2 :07 165 E 7 67 V.c 1 9 1, . ý I IDECp 8 1...WP.T. SASKATOIEAN4 p11100 i8-t976 a $lueLye$ C429 ,"omber 197r ILOCA&130N 𔃾S 26 WIN7 40 9LX 184 1Im AN ISO US00 AW CLMATIC. BRE- --- L ItI of. o4 U1 99...JUN 62 45 33 14 4.1 3.1 57 W 7 55 8583 . 9003 1 014621 JUL 78 50 3725 3.0.0 _# #W 7 477972 35.21900 5 20 0 010153 5 0 6 AUG72 -318 5.3 4.9 1 4W 7 47875

  2. All Biomass and UV Protective Composite Composed of Compatibilized Lignin and Poly (Lactic-acid)

    Science.gov (United States)

    Kim, Youngjun; Suhr, Jonghwan; Seo, Hee-Won; Sun, Hanna; Kim, Sanghoon; Park, In-Kyung; Kim, Soo-Hyun; Lee, Youngkwan; Kim, Kwang-Jin; Nam, Jae-Do

    2017-03-01

    Utilization of carbon-neutral biomass became increasingly important due to a desperate need for carbon reduction in the issue of global warming in light of replacing petroleum-based materials. We used lignin, which was an abundant, low cost, and non-food based biomass, for the development of all biomass-based films and composites through reactive compatibilization with poly (lactic-acid) (PLA). Using a facile and practical route, the hydrophilic hydroxyl groups of lignin were acetylated to impose the compatibility with PLA. The solubility parameter of the pristine lignin at 26.3 (J/cm3)0.5 was altered to 20.9 (J/cm3)0.5 by acetylation allowing the good compatibility with PLA at 20.2 (J/cm3)0.5. The improved compatibility of lignin and PLA provided substantially decreased lignin domain size in composites (12.7 μm), which subsequently gave transparent and UV-protection films (visual transmittance at 76% and UV protection factor over 40). The tensile strength and elongation of the developed composite films were increased by 22% and 76%, respectively, and the biobased carbon content was confirmed as 96 ± 3%. The developed PLA/lignin composites provided 100% all-biomass contents and balanced optical and mechanical properties that could broaden its eco-friendly applications in various industries.

  3. Polyethylene Glycol Based Graphene Aerogel Confined Phase Change Materials with High Thermal Stability.

    Science.gov (United States)

    Fu, Yang; Xiong, Weilai; Wang, Jianying; Li, Jinghua; Mei, Tao; Wang, Xianbao

    2018-05-01

    Polyethylene glycol (PEG) based graphene aerogel (GA) confined shaped-stabilized phase change materials (PCMs) are simply prepared by a one-step hydrothermal method. Three-dimensional GA inserted by PEG molecule chains, as a supporting material, obtained by reducing graphene oxide sheets, is used to keep their stabilized shape during a phase change process. The volume of GA is obviously expended after adding PEG, and only 9.8 wt% of GA make the composite achieve high energy efficiency without leakage during their phase change because of hydrogen bonding widely existing in the GA/PEG composites (GA-PCMs). The heat storage energy of GA-PCMs is 164.9 J/g, which is 90.2% of the phase change enthalpy of pure PEG. In addition, this composite inherits the natural thermal properties of graphene and thus shows enhanced thermal conductivity compared with pure PEG. This novel study provides an efficient way to fabricate shape-stabilized PCMs with a high content of PEG for thermal energy storage.

  4. Schlieren Visualization of the Energy Addition by Multi Laser Pulse in Hypersonic Flow

    International Nuclear Information System (INIS)

    Oliveira, A. C.; Minucci, M. A. S.; Toro, P. G. P.; Chanes, J. B. Jr; Myrabo, L. N.

    2008-01-01

    The experimental results of the energy addition by multi laser pulse in Mach 7 hypersonic flow are presented. Two high power pulsed CO 2 TEA lasers (TEA1 5.5 J, TEA2 3.9 J) were assembled sharing the same optical cavity to generate the plasma upstream of a hemispherical model installed in the tunnel test section. The lasers can be triggered with a selectable time delay and in the present report the results obtained with delay between 30 μs and 80 μs are shown. The schlieren technique associated with a high speed camera was used to accomplish the influence of the energy addition in the mitigation of the shock wave formed on the model surface by the hypersonic flow. A piezoelectric pressure transducer was used to obtain the time history of the impact pressure at stagnation point of the model and the pressure reduction could be measured. The total recovery of the shock wave between pulses as well as the prolonged effect of the mitigation without recovery was observed by changing the delay

  5. Biomimetic autonomous robot inspired by the Cyanea capillata (Cyro)

    International Nuclear Information System (INIS)

    Villanueva, Alex A; Marut, Kenneth J; Michael, Tyler; Priya, Shashank

    2013-01-01

    A biomimetic robot inspired by Cyanea capillata, termed as ‘Cyro’, was developed to meet the functional demands of underwater surveillance in defense and civilian applications. The vehicle was designed to mimic the morphology and swimming mechanism of the natural counterpart. The body of the vehicle consists of a rigid support structure with linear DC motors which actuate eight mechanical arms. The mechanical arms in conjunction with artificial mesoglea create the hydrodynamic force required for propulsion. The full vehicle measures 170 cm in diameter and has a total mass of 76 kg. An analytical model of the mechanical arm kinematics was developed. The analytical and experimental bell kinematics were analyzed and compared to the C. capillata. Cyro was found to reach the water surface untethered and autonomously from a depth of 182 cm in five actuation cycles. It achieved an average velocity of 8.47 cm s −1  while consuming an average power of 70 W. A two-axis thrust stand was developed to calculate the thrust directly from a single bell segment yielding an average thrust of 27.9 N for the whole vehicle. Steady state velocity during Cyro's swimming test was not reached but the measured performance during its last swim cycle resulted in a cost of transport of 10.9 J (kg ⋅ m) −1  and total efficiency of 0.03. (paper)

  6. Towards an autonomous self-tuning vibration energy harvesting device for wireless sensor network applications

    International Nuclear Information System (INIS)

    Challa, Vinod R; Prasad, M G; Fisher, Frank T

    2011-01-01

    Future deployment of wireless sensor networks will ultimately require a self-sustainable local power source for each sensor, and vibration energy harvesting is a promising approach for such applications. A requirement for efficient vibration energy harvesting is to match the device and source frequencies. While techniques to tune the resonance frequency of an energy harvesting device have recently been described, in many applications optimization of such systems will require the energy harvesting device to be able to autonomously tune its resonance frequency. In this work a vibration energy harvesting device with autonomous resonance frequency tunability utilizing a magnetic stiffness technique is presented. Here a piezoelectric cantilever beam array is employed with magnets attached to the free ends of cantilever beams to enable magnetic force resonance frequency tuning. The device is successfully tuned from − 27% to + 22% of its untuned resonance frequency while outputting a peak power of approximately 1 mW. Since the magnetic force tuning technique is semi-active, energy is only consumed during the tuning process. The developed prototype consumed maximum energies of 3.3 and 3.9 J to tune to the farthest source frequencies with respect to the untuned resonance frequency of the device. The time necessary for this prototype device to harvest the energy expended during its most energy-intensive (largest resonant frequency adjustment) tuning operation is 88 min in a low amplitude 0.1g vibration environment, which could be further optimized using higher efficiency piezoelectric materials and system components

  7. Flexibility of Physiological Traits Underlying Inter-Individual Growth Differences in Intertidal and Subtidal Mussels Mytilusgalloprovincialis.

    Directory of Open Access Journals (Sweden)

    María José Fernández-Reiriz

    Full Text Available Mussel seed (Mytilusgalloprovincialis gathered from the intertidal and subtidal environments of a Galician embayment (NW, Spain were maintained in the laboratory during five months to select fast (F and slow (S growing mussels. The physiological basis underlying inter-individual growth variations were compared for F and S mussels from both origins. Fast growing seemed to be a consequence of greater energy intake (20% higher clearance and ingestion rate and higher food absorption rate coupled with low metabolic costs. The enhanced energy absorption (around 65% higher resulted in 3 times higher Scope for Growth in F mussels (20.5±4.9 J h(-1 than S individuals (7.3±1.1 J h(-1. The higher clearance rate of F mussels appears to be linked with larger gill filtration surface compared to S mussels. Intertidal mussels showed higher food acquisition and absorption per mg of organic weight (i.e. mass-specific standardization than subtidal mussels under the optimal feeding conditions of the laboratory. However, the enhanced feeding and digestive rates were not enough to compensate for the initial differences in tissue weight between mussels of similar shell length collected from the intertidal and subtidal environments. At the end of the experiment, subtidal individuals had higher gill efficiency, which probably lead to higher total feeding and absorption rates relative to intertidal individuals.

  8. Treatment of pigmented keratosis pilaris in Asian patients with a novel Q-switched Nd:YAG laser.

    Science.gov (United States)

    Kim, Sangeun

    2011-06-01

    Treatment for most cases of keratosis pilaris requires simple reassurance and general skin care recommendations. Many Asian patients find lesions due to pigmented keratosis pilaris to be cosmetically unappealing. Treatment of post-inflammatory hyperpigmentation using a 1064-nm Q-switched Nd:YAG laser with low fluence is reported. To investigate the efficacy of a novel Q-switched Nd:YAG laser for the treatment of pigmented keratosis pilaris in Asian patients. Ten patients with pigmented keratosis pilaris underwent five weekly treatments using a Q-switched Nd:YAG laser (RevLite(®); HOYA ConBio(®), Freemont, CA, USA) at 1064 nm with a 6-mm spot size and a fluence of 5.9 J/cm(2). Photographic documentation was obtained at baseline and 2 months after the final treatment. Clinical improvement was achieved in all 10 patients with minimal adverse effects. For the treatment of keratosis pilaris, the use of a Q-switched Nd:YAG laser can be helpful for improving cosmetic appearance as it can improve pigmentation.

  9. Structural and magnetic properties of MnCo1-xVxGe compounds

    International Nuclear Information System (INIS)

    Meng, G.H.; Tegus, O.; Zhang, W.G.; Song, L.; Huang, J.H.

    2010-01-01

    The structural and magnetic properties of MnCo 1-x V x Ge (x = 0.00, 0.02, 0.04, 0.06, 0.08, 0.10, 0.20 and 0.30) compounds were investigated by means of X-ray diffraction, scanning electron microscopy and magnetization measurements. The MnCo 1-x V x Ge compounds crystallize in the orthorhombic TiNiSi-type crystal structure for x ≤ 0.02 and in the hexagonal Ni 2 In-type structure for x > 0.02. The magnetization measurements show that the MnCo 1-x V x Ge compounds exhibit a complex magnetic behavior. The Curie temperature can be tuned from 360 K to 148 K by increasing x. The maximal magnetic-entropy change is 3.9 J/kg K for x = 0.06 at a field change from 0 to 1.5 T at about 265 K.

  10. Spectral emissivity measurements of liquid refractory metals by spectrometers combined with an electrostatic levitator

    International Nuclear Information System (INIS)

    Ishikawa, Takehiko; Okada, Junpei T; Paradis, Paul-François; Ito, Yusuke; Masaki, Tadahiko; Watanabe, Yuki

    2012-01-01

    A spectral emissivity measurement system combined with an electrostatic levitator was developed for high-temperature melts. The radiation intensity from a high-temperature sample was measured with a multichannel photospectrometer (MCPD) over the 700–1000 nm spectral range, while a Fourier transform infrared spectrometer (FTIR) measured the radiation over the 1.1–6 µm interval. These spectrometers were calibrated with a blackbody radiation furnace, and the spectral hemispherical emissivity was calculated. The system's capability was evaluated with molten zirconium samples. The spectral hemispherical emissivity of molten zirconium showed a negative wavelength dependence and an almost constant variation over the 1850–2210 K temperature range. The total hemispherical emissivity of zirconium calculated by integrating the spectral hemispherical emissivity was found to be around 0.32, which showed good agreement with the literature values. The constant pressure heat capacity of molten zirconium at melting temperature was calculated to be 40.9 J mol −1 K −1 . (paper)

  11. Effect of UV radiation on the genetic inactivation of sperm of the bullseye puffer Sphoeroides annulatus (Jenyns, 1842); Efecto de la radiacion UV en la inactivacion genetica del esperma de botete diana Sphoeroides annulatus (Jenyns, 1842)

    Energy Technology Data Exchange (ETDEWEB)

    Arias-Rodriguez, Lenin; Rodriguez-Ibarra, Luz Estela; Del Valle-Pignataro, Gabriela [Laboratorio de Genetica, Centro de Investigacion en Alimentacion y Desarrollo, A. C., Sinaloa (Mexico)

    2004-09-15

    Genetic (DNA) inactivation of fish sperm with ultraviolet irradiation is generally accompanied by a paradoxical effect on survival rates (Hertwig effect). In the present study, sperm samples from ten males bullseye puffer fish (Sphoeroides annulatus) were diluted 1:50 using Cortland's extender solution and used to test the effect of nine ultraviolet doses (0.2-1.0 J cm{sup -}2 ) on motility time in seconds, motility index, and embryo survival rate after fertilizing eggs from five bullseye puffer females. Motility time of sperm irradiated with 0.2-0.9 J cm{sup -}2 were not statistically different from the controls, but sperm irradiated with a dosage of 1.0 J cm{sup -}2 dosage had significant lower motility time. Motility indices (MI) allowed for the statistical differentiation of four groups in relation to their response to different radiation doses: the first had high MI, and included the controls and 0.2-0.3 J cm{sup -}2 treatments; the second had lower MI and included the 0.4-0.7 J cm{sup -}2 treatments; the third showed recovery of MI and included the 0.8-0.9 J cm{sup -}2 treatments; and the fourth showed the lowest MI with the 1.0 J cm{sup -}2 treatment. Embryo survival was highest for the controls and 0.2 J cm{sup -}2 treatment, decreasing in the 0.3-0.4 J cm{sup -}2 treatments, increasing again in the 0.5-0.8 J cm{sup -}2 treatments, until reaching lowest survival in the 0.9-1.0 J cm{sup -}2 treatments. These results indicate that the best ultraviolet dosage to achieve genetic inactivation of sperm of this species is close to 0.7 J cm{sup -}2, a dosage in which fish fry showed typical haploid syndrome characteristics. [Spanish] La inactivacion genetica (ADN) del esperma de peces se realiza mediante luz ultravioleta que, en irradiaciones crecientes, genera efectos paradojicos (efecto Hertwig) en los porcentajes de supervivencia. En este trabajo se diluyeron muestras de semen provenientes de diez machos de botete diana (Sphoeroides annulatus) en solucion

  12. High contrast high intensity petawatt J-KAREN-P laser facility at QST

    Science.gov (United States)

    Nishiuchi, Mamiko; Kiriyama, Hiromitsu; Sakaki, Hironao; Dover, Nicholas P.; Kondo, Kotaro; Pirozhkov, Alexander S.; Sagisaka, Akito; Fukuda, Yuji; Nishitani, Keita; Miyahara, Takumi; Ogura, Koichi; Alkhimova, Mariya A.; Pikuz, Tatiana A.; Faenov, Anatoly Y.; Watanabe, Yukinobu; Koga, James; Bulanov, Sergei V.; Kando, Masaki; Kondo, Kiminori

    2017-05-01

    We report on the J-KAREN-P laser facility at QST, which can provide PW peak power at 0.1 Hz on target. The system can deliver short pulses with an energy of 30 J and pulse duration of 30 fs after compression with a contrast level of better than 1012. Such performance in high field science will give rise to the birth of new applications and breakthroughs, which include relativistic particle acceleration, bright x-ray source generation, and nuclear activation. The current achieved laser intensity on target is up to > 9x1021 Wcm-2 with an energy of 9 J on target. The interaction with a 3 to 5- μm stainless steel tape target provides us electrons with a typical temperature of more than 10 MeV and energetic proton beams with typical maximum energies of > 40 MeV with good reproducibility. The protons are accelerated in the Target Normal Sheath Acceleration regime, which is suitable for many applications including as an injector into a beamline for medical use, which is one of our objectives.

  13. 670nm photobiomodulation as a novel protection against retinopathy of prematurity: evidence from oxygen induced retinopathy models.

    Directory of Open Access Journals (Sweden)

    Riccardo Natoli

    Full Text Available INTRODUCTION: To investigate the validity of using 670nm red light as a preventative treatment for Retinopathy of Prematurity in two animal models of oxygen-induced retinopathy (OIR. MATERIALS AND METHODS: During and post exposure to hyperoxia, C57BL/6J mice or Sprague-Dawley rats were exposed to 670 nm light for 3 minutes a day (9J/cm². Whole mounted retinas were investigated for evidence of vascular abnormalities, while sections of neural retina were used to quantify levels of cell death using the TUNEL technique. Organs were removed, weighed and independent histopathology examination performed. RESULTS: 670 nm light reduced neovascularisation, vaso-obliteration and abnormal peripheral branching patterns of retinal vessels in OIR. The neural retina was also protected against OIR by 670 nm light exposure. OIR-exposed animals had severe lung pathology, including haemorrhage and oedema, that was significantly reduced in 670 nm+OIR light-exposed animals. There were no significance differences in the organ weights of animals in the 670 nm light-exposed animals, and no adverse effects of exposure to 670 nm light were detected. DISCUSSION: Low levels of exposure to 670 nm light protects against OIR and lung damage associated with exposure to high levels of oxygen, and may prove to be a non-invasive and inexpensive preventative treatment for ROP and chronic lung disease associated with prematurity.

  14. Pharmaceutical direct-to-consumer advertising and US Hispanic patient-consumers.

    Science.gov (United States)

    Barker, Kristin K; Vasquez Guzman, Cirila Estela

    2015-11-01

    Hispanic Americans use prescription medications at markedly lower rates than do non-Hispanic whites. At the same time, Hispanics are the largest racial-ethnic minority in the USA. In a recent effort to reach this underdeveloped market, the pharmaceutical industry has begun to create Spanish-language direct-to-consumer advertising (DTCA) campaigns. The substantive content of these campaigns is being tailored to appeal to the purported cultural values, beliefs and identities of Latino consumers. We compare English-language and Spanish-language television commercials for two prescription medications. We highlight the importance of selling medicine to a medically under-served population as a key marketing element of Latino-targeted DTCA. We define selling medicine as the pharmaceutical industry's explicit promotion of medicine's cultural authority as a means of expanding its markets and profits. We reflect on the prospects of this development in terms of promoting medicalisation in a US subgroup that has heretofore eluded the pharmaceutical industry's marketing influence. Our analysis draws on Nikolas Rose's insights concerning variations in the degree to which certain groups of people are more medically made up than others, by reflecting on the racial and ethnic character of medicalisation in the USA and the role DTCA plays in shaping medicalisation trends. A video abstract of this article can be found at: https://www.youtube.com/watch?v=ZabCle9-jHw&feature=youtu.be. © 2015 Foundation for the Sociology of Health & Illness.

  15. Photo-stimulatory effect of low energy helium-neon laser irradiation on excisional diabetic wound healing dynamics in wistar rats

    Directory of Open Access Journals (Sweden)

    Maiya Arun

    2009-01-01

    Full Text Available Background: Generally, the significances of laser photo stimulation are now accepted, but the laser light facilitates wound healing and tissue repair remains poorly understood. Aims: We have examined the hypothesis that the laser photo stimulation can enhance the collagen production in diabetic wounds using the excision wound model in the Wistar rat model. Methods: The circular wounds were created on the dorsum of the back of the animals. The animals were divided into two groups. The study group (N = 24 wound was treated with 632.8 nm He-Ne laser at a dose of 3-9J/cm 2 for 5 days a week until the wounds healed completely. The control group was sham irradiated. Result: A significant increase in the hydroxyproline content and reduction in the wound size were observed in the study group. The pro-healing actions seem to be due to increased collagen deposition as well as better alignment and maturation. Conclusion: The biochemical analysis and clinical observation suggested that 3-6 J/cm 2 laser photo stimulation facilitates the tissue repair process by accelerating collagen production in diabetic wound healing.

  16. Langmuir probe measurements and mass spectrometry of plasma plumes generated by laser ablation of La0.4Ca0.6MnO3

    Science.gov (United States)

    Chen, Jikun; Lunney, James G.; Lippert, Thomas; Ojeda-G-P, Alejandro; Stender, Dieter; Schneider, Christof W.; Wokaun, Alexander

    2014-08-01

    The plasma formed in vacuum by UV nanosecond laser ablation of La0.4Ca0.6MnO3 in the fluence range of 0.8 to 1.9 J cm-2 using both Langmuir probe analysis and energy-resolved mass spectrometry has been studied. Mass spectrometry shows that the main positive ion species are Ca+, Mn+, La+, and LaO+. The Ca+ and Mn+ energy distributions are quite broad and lie in the 0-100 eV region, with the average energies increasing with laser fluence. In contrast, the La+ and LaO+ distributions are strongly peaked around 10 eV. The net time-of-arrival signal derived from the measured positive ion energy distributions is broadly consistent with the positive ion signal measured by the Langmuir probe. We also detected a significant number of O- ions with energies in the range of 0 to 10 eV. The Langmuir probe was also used to measure the temporal variation of the electron density and temperature at 6 cm from the ablation target. In the period when O- ions are found at this position, the plasma conditions are consistent with those required for significant negative oxygen ion formation, as revealed by studies on radio frequency excited oxygen plasma.

  17. The effect of UV-B radiation on chloroplast translation in Pisum sativum

    International Nuclear Information System (INIS)

    Raab, M.M.; Jagendorf, A.T.

    1990-01-01

    UV-B radiation has previously been reported to reduce growth, flowering, and net photosynthesis. The present study examines the effect of UV-B radiation on isolated chloroplast of 7-10 day old pea seedlings. Amount of ( 3 H)-Leu incorporated into isolated chloroplasts was measured in the presence or absence of UV-B exposure. Preliminary experiments show a 30% inhibition of protein synthesis in isolated chloroplasts after only 20 mins of UV-B exposure (6.9 J/m 2 /30 min). Percent inhibition of chloroplast translation is directly correlated with UV-B exposure over a 60 min time span. Preliminary studies also show no change in both cold and radiolabeled protein profiles as expressed on 1-D PAGE and autofluorography. Comparative studies on the sensitivity of e - flow vs protein synthesis following UV-B exposure are underway. Further work on the role of oxygen free radicals and the specific site of action of UV-B damage to the translation machinery of chloroplasts will be discussed

  18. Cannon AFB, Clovis, New Mexico. Revised Uniform Summary of Surface Weather Observations (RUSSWO), Parts A-F

    Science.gov (United States)

    1975-06-16

    I 91, 91o4 9i.4 91. 91.6 9j.6 91. S700 tb~o 097K97 89o 90.106 9o’ - 9 -1LT ItC lp -,1 󈨟.7 s6 91p 9 91* WO- 96 6000 6.4 9c1 90.4, 90,9 91,2 91.3 9i...88.7 88.7 88.8 68.9 9i86 S700 ~78.5 04I70 53~ v "om 39-; Th 18b17 l 9 9313 6W_- 78.6 64.2 85.3 86.9 88.2 88.4 89?o 89.1 89.1 89.6 89.8 89.8 89.9 9o...800 086 93,6 94.11 947 95.3 95.4 95.6 95,7 95.7 96.2 96.3 96.3 9 6 ,L 96.4 96.4 96.4 S700 - _ 94.2 94o8 9ř. 95 e 99--9 9 - -- 99 6 65 965 >__6W 88.6

  19. FT Stewart AAF, Savannah, Georgia. Revised Uniform Summary of Surface Weather Observations (RUSSWO)

    Science.gov (United States)

    1979-04-18

    8 3.5194.:2 96. 9 e , 8.4 98 98 ,9 981 989 98.99 9819 98. S700 67.01 88*91 93,5’ 94*4 97,01 97:61 98.9 98 91 9)8 9 99.5 99*5 9995 99.5 99051 9 9 j,5...91.6 92.6192.6 93,.3 94.1 C 33.1 54.3 71.4 77.5 8697 87.4 89.9 90.7 90Q±9 9 196 92*0 92 93.1 93.1 93.9 94. S700 33.1 54. 171,6 77.9 87,4 88.2 9o*7...940𔃾 9 5:O 95931 95.3 95.6 95.6 95.6 95.6 95.6 95.6 95.6 S700 54.2 78.0 88.9 92.2 9500 95.8 9604 96.8 96.9 97.4 97.4 97.41 97.4 97.4 97.4 97.4 S54.21

  20. China's rising hydropower demand challenges water sector.

    Science.gov (United States)

    Liu, Junguo; Zhao, Dandan; Gerbens-Leenes, P W; Guan, Dabo

    2015-07-09

    Demand for hydropower is increasing, yet the water footprints (WFs) of reservoirs and hydropower, and their contributions to water scarcity, are poorly understood. Here, we calculate reservoir WFs (freshwater that evaporates from reservoirs) and hydropower WFs (the WF of hydroelectricity) in China based on data from 875 representative reservoirs (209 with power plants). In 2010, the reservoir WF totaled 27.9 × 10(9) m(3) (Gm(3)), or 22% of China's total water consumption. Ignoring the reservoir WF seriously underestimates human water appropriation. The reservoir WF associated with industrial, domestic and agricultural WFs caused water scarcity in 6 of the 10 major Chinese river basins from 2 to 12 months annually. The hydropower WF was 6.6 Gm(3) yr(-1) or 3.6 m(3) of water to produce a GJ (10(9) J) of electricity. Hydropower is a water intensive energy carrier. As a response to global climate change, the Chinese government has promoted a further increase in hydropower energy by 70% by 2020 compared to 2012. This energy policy imposes pressure on available freshwater resources and increases water scarcity. The water-energy nexus requires strategic and coordinated implementations of hydropower development among geographical regions, as well as trade-off analysis between rising energy demand and water use sustainability.

  1. The impact of fabrication parameters and substrate stiffness in direct writing of living constructs.

    Science.gov (United States)

    Tirella, Annalisa; Ahluwalia, Arti

    2012-01-01

    Biomolecules and living cells can be printed in high-resolution patterns to fabricate living constructs for tissue engineering. To evaluate the impact of processing cells with rapid prototyping (RP) methods, we modeled the printing phase of two RP systems that use biomaterial inks containing living cells: a high-resolution inkjet system (BioJet) and a lower-resolution nozzle-based contact printing system (PAM(2)). In the first fabrication method, we reasoned that cell damage occurs principally during drop collision on the printing surface, in the second we hypothesize that shear stresses act on cells during extrusion (within the printing nozzle). The two cases were modeled changing the printing conditions: biomaterial substrate stiffness and volumetric flow rate, respectively, in BioJet and PAM(2). Results show that during inkjet printing impact energies of about 10(-8) J are transmitted to cells, whereas extrusion energies of the order of 10(-11) J are exerted in direct printing. Viability tests of printed cells can be related to those numerical simulations, suggesting a threshold energy of 10(-9) J to avoid permanent cell damage. To obtain well-defined living constructs, a combination of these methods is proposed for the fabrication of scaffolds with controlled 3D architecture and spatial distribution of biomolecules and cells. Copyright © 2012 American Institute of Chemical Engineers (AIChE).

  2. Laser Shock Processing of 6061-T6 Al alloy with 1064 nm and 532 nm wavelengths

    International Nuclear Information System (INIS)

    Gomez-Rosas, G.; Rubio-Gonzalez, C.; Ocana, J.L.; Molpeceres, C.; Porro, J.A.; Morales, M.; Casillas, F.J.

    2010-01-01

    Laser Shock Processing (LSP) has been proposed as a competitive alternative technology to classical treatments for improving fatigue and wear resistance of metals. We present a configuration and results in the LSP concept for metal surface treatments in underwater laser irradiation at 532 nm and 1064 nm. The purpose of the work is to compare the effect of both wavelengths on the same material. A convergent lens is used to deliver 1.2 J/pulse (1064 nm) and 0.9 J/pulse (532 nm) in a 8 ns laser FWHM pulse produced by 10 Hz Q-switched Nd:YAG laser with spots of a 1.5 mm in diameter moving forward along the work piece. A LSP configuration with experimental results using a pulse density of 2500 pulses/cm 2 and 5000 pulses/cm 2 in 6061-T6 aluminum samples are presented. High level compressive residual stresses are produced using both wavelengths. It has been shown that surface residual stress level is comparable to that achieved by conventional shot peening, but with greater depths. This method can be applied to surface treatment of final metal products.

  3. Fabrication and performances of microencapsulated paraffin composites with polymethylmethacrylate shell based on ultraviolet irradiation-initiated

    Energy Technology Data Exchange (ETDEWEB)

    Wang Yi, E-mail: wangyi@lut.cn [State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050 (China); College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050 (China); Shi Huan [College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050 (China); Xia Tiandong [State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050 (China); Zhang Ting; Feng Huixia [College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050 (China)

    2012-07-16

    In order to identify the validity of fabricating microencapsulated phase change material by ultraviolet irradiation-initiated method, the paraffin wax/polymethyl methacrylate microcapsules were prepared. The structural characteristics and thermal properties of the microcapsules were also determined by various techniques. The results of differential scanning calorimetry analyses indicate that the melting and freezing temperatures and latent heats of the microcapsules are 55.8 Degree-Sign C, 50.1 Degree-Sign C and 106.9 J g{sup -1}, 112.3 J g{sup -1}, respectively. Morphology and chemical characteristic analysis indicate that the spherical microcapsules were formed with average diameter of 0.21 {mu}m and maximum microencapsulation ratio of 66 wt.% without leakage of core materials. The results of accelerated thermal cyclic test show that the microcapsules have good thermal reliability and chemical stability although they were subjected 3000 melting/freezing cycles. Based on all these results, it can be concluded that the microencapsulated paraffin composites have good potential for thermal energy storage purposes and ultraviolet irradiation-initiated method is a prominent candidate for preparing microencapsulated PCMs. - Highlights: Black-Right-Pointing-Pointer Microencapsulated paraffin with PMMA shell was synthesized via self-assembly. Black-Right-Pointing-Pointer Microcapsules with excellent properties can be prepared by UV initiated method. Black-Right-Pointing-Pointer The microencapsulation ratio is as high as 66 wt.%. Black-Right-Pointing-Pointer Thermal properties are as high as comparable with microcapsules in the literature.

  4. Fabrication and performances of microencapsulated paraffin composites with polymethylmethacrylate shell based on ultraviolet irradiation-initiated

    International Nuclear Information System (INIS)

    Wang Yi; Shi Huan; Xia Tiandong; Zhang Ting; Feng Huixia

    2012-01-01

    In order to identify the validity of fabricating microencapsulated phase change material by ultraviolet irradiation-initiated method, the paraffin wax/polymethyl methacrylate microcapsules were prepared. The structural characteristics and thermal properties of the microcapsules were also determined by various techniques. The results of differential scanning calorimetry analyses indicate that the melting and freezing temperatures and latent heats of the microcapsules are 55.8 °C, 50.1 °C and 106.9 J g −1 , 112.3 J g −1 , respectively. Morphology and chemical characteristic analysis indicate that the spherical microcapsules were formed with average diameter of 0.21 μm and maximum microencapsulation ratio of 66 wt.% without leakage of core materials. The results of accelerated thermal cyclic test show that the microcapsules have good thermal reliability and chemical stability although they were subjected 3000 melting/freezing cycles. Based on all these results, it can be concluded that the microencapsulated paraffin composites have good potential for thermal energy storage purposes and ultraviolet irradiation-initiated method is a prominent candidate for preparing microencapsulated PCMs. - Highlights: ► Microencapsulated paraffin with PMMA shell was synthesized via self-assembly. ► Microcapsules with excellent properties can be prepared by UV initiated method. ► The microencapsulation ratio is as high as 66 wt.%. ► Thermal properties are as high as comparable with microcapsules in the literature.

  5. The effect of MLS laser radiation on cell lipid membrane.

    Science.gov (United States)

    Pasternak, Kamila; Wróbel, Dominika; Nowacka, Olga; Pieszyński, Ireneusz; Bryszewska, Maria; Kujawa, Jolanta

    2018-03-14

    Authors of numerous publications have proved the therapeutic effect of laser irradiation on biological material, but the mechanisms at cellular and subcellular level are not yet well understood. The aim of this study was to assess the effect of laser radiation emitted by the MLS M1 system (Multiwave Locked System) at two wavelengths (808 nm continuous and 905 nm pulsed) on the stability and fluidity of liposomes with a lipid composition similar to that of human erythrocyte membrane or made of phosphatidylocholine. Liposomes were exposed to low-energy laser radiation at surface densities 195 mW/cm2 (frequency 1,000 Hz) and 230 mW/cm2 (frequency 2,000 Hz). Different doses of radiation energy in the range 0-15 J were applied. The surface energy density was within the range 0.46 - 4.9 J/cm 2. The fluidity and stability of liposomes subjected to such irradiation changed depending on the parameters of radiation used. Since MLS M1 laser radiation, depending on the parameters used, affects fluidity and stability of liposomes with the lipid content similar to erythrocyte membrane, it may also cause structural and functional changes in cell membranes.

  6. Variation on Molecular Structure, Crystallinity, and Optical Properties of Dentin Due to Nd:YAG Laser and Fluoride Aimed at Tooth Erosion Prevention

    Science.gov (United States)

    Freitas, Anderson Z.; Bachmann, Luciano; Benetti, Carolina; Ana, Patricia A.

    2018-01-01

    This in vitro study evaluated the compositional, crystalline, and morphological effects promoted by Nd:YAG laser on root dentin, and verified the effects of laser and topical acidulated phosphate fluoride application (APF-gel) on dentin erosion. 180 bovine dentin slabs were randomized into 4 groups (n = 45): G1–untreated, G2–APF-gel (1.23% F−, 4 min), G3–Nd:YAG (1064 nm, 84.9 J/cm2, 10 Hz), and G4–APF-gel application followed by Nd:YAG laser irradiation. The compositional, crystalline, and morphological effects promoted by treatments were investigated on five samples of each experimental group. The other samples were submitted to a 5-day, 10-day, or 15-day erosive and abrasive demineralization and remineralization cycling in order to create erosion lesions. The area and depth of lesions, as well as the optical attenuation coefficient, were assessed, and all data were statistically analysed (p laser promoted the reduction of carbonate, the formation of tetracalcium phosphate, as well as the melting and recrystallization of the dentin surface. Laser significantly decreased the area and depth of erosion lesions and altered the optical attenuation coefficient when compared to untreated and APF-gel groups, but the association of APF-gel and laser did not promote an additional effect. Nd:YAG laser irradiation can be a promissory treatment to prevent dentin erosion and the abrasion process. PMID:29389868

  7. Application of Nuclear Radiation to Textile Materials and Processes. Radiation-induced graft copolymerization of vinyl monomers and fibrous polymers; Applications des rayonnements aux textiles. Formation radiochimique de copolymeres ''greffes'' par l'action de monomeres vinyliques sur des polymeres en fibre; Primenenie yadernogo izlucheniya v tekstil'noj promyshlennosti. Obrazovanie privitykh sopolimerov iz vinilovykh monomerov i voloknistykh polimerov pod dejstviem izlucheniya; Aplicaciones de las radiaciones nucleares a los procesos y materiales textiles. Copolimerizacion por injerto radioinducida de monomeros vinilicos y de polimeros fibrosos

    Energy Technology Data Exchange (ETDEWEB)

    Armstrong, Jr., A. A.; Rutherford, H. A. [University of North Carolina at Raleigh, NC (United States)

    1963-11-15

    que la modificacion de las propiedades de la fibra mediante el procedimiento descrito podria aprovecharse en el terreno comerical de encontrarse procedimientos que permitan aumentar la velocidad de difusion del monomero en la estructura de la fibra. (author) [Russian] Razrabotana standartnaya metodika radiatsionnoj privivki letuchikh vinilovykh monomerov k voloknistym polimeram. Ehta metodika sostoit v vvedenii organicheskogo soedineniya v parovoj faze; protsess osushchestvlyaetsya ili putem odnovremennogo oblucheniya ili predvaritel'nym oblucheniem ot istochnika Co''6''0. Issledovany sistemy, povyshayushchie skorost' privitoj sopolimeriehatsii. Ustanovleno, chto mozhno vvodit' znachitel'nye kolichestva nekotorykh monomerov, ne vyzyvaya radiatsionnogo povrezhdeniya voloknistogo substrata. Imenno te voloknistye materialy, kotorye sravnitel'no neustojchivo reagiruyut na radiatsiyu naibolee legko prisoedinyayut vinilovye soedineniya. K takim materialam otnosyatsya tsellyulozy, slozhnye ehfiry tsellyulozy, poliamidy i polipropilen. Prisoedinenie monomera k voloknistomu substratu, ochevidno, proiskhodit po svobodno-radikal'nomu mekhanizmu, i, kak uzhe ukazyvalos' vyshe, mozhno snachala obluchit' volokno a zatem provodit' privivku, podvergaya obluchennyj material vozdejstviyu parov mono- mera. Predprinimalis' popytki vyyasnit' dlitel'nost' sushchestvovaniya svobodnykh radikalov i, khotya dovol'no trudno poluchit' tochnye dannye, bylo pokazano, chto svobodnye radikaly prodolzhayut sokhranyat'sya v nekotorykh voloknakh spustya 15 - 20 chasov posle oblucheniya, dazhe pri komnatnoj temperature. Predvaritel'nye opytnye dannye takzhe navodyat na mysl' o tom,chto pri posleradiatsionnom privivanii monomer diffundiruet k svobodno-radikal'nym tsentram s razlichnymi skorostyami v raznykh voloknakh. Volokno khlopka, modifitsirovannoe vvedeniem v ego sostav poliakrilonitrila, ustojchivo k dejstviyu mikroorganizmov. Vvedenie 3,5%-nogo poliakrilonitrila pozvolyaet materialu sokhranyat

  8. The Cobalt-60 Research Facility at Seibersdorf; L'Installation de Recherche sur l'Iradiation au {sup 60}Co de Seibersdorf; Obluchayushchaya ustanovka s istochnikom Kobal'ta-60 reaktornogo tsentra v Zajbersdorfe; La Instalacion Experimental de {sup 60}Co de Seibersdorf

    Energy Technology Data Exchange (ETDEWEB)

    Weidinger, N.; Kaindl, K. [Institute Of Biology And Agriculture, Reactor Centre, Seibersdorf (Austria)

    1966-11-15

    caso de grave peligro ese dispositivo hace que las fuentes vuelvan inmediatamente a su posicion de reposo; si el peligro no es grave, las pone al alcance del cientifico para.que este decida si debe o no continuarse la irradiacion. (author) [Russian] Nahodjashhajasja v stadii stroitel'stva v nastojashhee vremja ustanovka po oblucheniju skonstruirovana, v osnovnom, dlja issledovanij v ramkah Mezhdunarodnoj programmy po fruktovym sokam. Ustanovka sostoit iz dvuh kamer obluchenija moshhnost'ju 30 i 10. kkjuri sootvetstvenno. Pervaja kamera prednaznachaetsja dlja obluchenija partij fruktovogo soka s cel'ju provedenija opytov na prigodnost' upotreblenija v pishhu, a takzhe dlja issledovanij v oblasti tehnologii istochnikov. Vtoraja kamera prednaznachena dlja mikrobiologicheskih i himicheskih issledovanij i imeet maksimal'nye vozmozhnosti izmenenija konfiguracii i pozicii istochnika v.zavisimosti ot uslovij opyta. Biologicheskij jekran, izgotovlennyj iz obychnogo betona plotnost'ju okolo 2,4 tonny/m3 snizhaet maksimal'nuju moshhnost' dozy snaruzhi do 0,2 mkrentgen.v chas. Oba istochnika pokojatsja v svincovom cilindre, opushhennom v beton zashhitnogo jekrana. Sootvetstvenno 12 i 6 trubok iz nerzhavejushhej stali, v kotoryh smontirovany kobal'tovye sterzhni,prohodjat v kameru obluchenija cherez sfericheskij kanal. Sterzhni iz kobal'ta-60 ustanovki .moshhnost'ju 30 kkjuri imejut 300 mm v dlinu i sostojat iz dvuh chastej. Oni mogut byt' ustanovleny poodinochke ili v ljuboj kombinacii priblizitel'no za 5 sekund pri pomoshhi vozdushnopnevmaticheskoj sistemy. Ispol'zovanie razlichnyh trubok sootvetstvujushhego izgiba pozvoljaet dobit'sja prakticheski ljuboj geometrii istochnika. Kamera imeet vnutrennie razmery 3 x 3 x 3 m i zakryvaetsja betonnoj dver'ju. Vo vremja obluchenija za opytom mozhno nabljudat' s pomoshh'ju binokuljarnogo periskopa . Dostup v druguju kameru s vnutrennimi razmerami 3,5 x 3 x 3 m i istochnikom moshhnost'ju 10 kkjuri osushhestvljaetsja cherez labirint. Shest

  9. Fission gas pressure build-up and fast-breeder economy; Accumulation de la pression des gaz de fission et economie des reacteurs surgenerateurs a neutrons rapides; Nakoplenie davleniya gazov produktov deleniya i ehkonomika reaktorov-razmnozhitelej na bystrykh nejtronakh; Aumento de la presion de los gases de fision y economia de los reactores reproductores rapidos

    Energy Technology Data Exchange (ETDEWEB)

    Engelmann, P [Kernforschungszentrum, Karlsruhe (Germany)

    1962-03-15

    materiales de alta resistencia, tales como el Inconel-X y el molibdeno pueden soportar la presion de los gases de fision a las temperaturas de funcionamiento corrientes. Desgraciadamente , la seccion eficaz de absorcion de estos materiales es superior a la del acero inoxidable. El autor presenta los resultados de calculos, realizados segun una teoria de varios grupos, que permite conocer el efecto de la utilizacion de estos materiales y de la disminucion de la densidad del combustible, sobre la masa critica y sobre la razon de reproduccion en los reactores reproductores de pequenas y medianas dimensiones. (author) [Russian] Na stoimost' toplivnogo tsikla i na vremya udvoeniya reaktorovbriderov na bystrykh nejtronakh sil'no vliyaet stepen' dostigaemogo vygoraniya topliva. Ispol'zovani e oksidnogo ili karbidnogo topliva daet vozmozhnost' dostignut' vygoraniya poryadka 100 000 mvt-n/t. V toplivnykh ehlementakh s pokrytiem ogranichivayushchi m faktorom yavlyaetsya rost gazov produktov deleniya. Pri rassmatrivaemo m vysokom vygoranii poddayushchayasya otsenke fraktsiya gazov, obrazuemykh pri delenii, popadaet v pory i tem samym uvelichivaet davlenie na obolochku. Iskhodya iz izvestnykh vykhodov produktov deleniya i tsepochek raspada bylo vychisleno kolichestvo obrazuyushchegosya gaza i sozdavaemoe im davlenie. Pri raschete davleniya, dejstvuyushchego na obolochku, byli ispol'zovany tri fizicheskikh modeli: i) gaz soderzhalsya v svyazanykh mezhdu soboj porakh, ii) v otdel'nykh porakh i iii) v tsentral'nom otverstii. Budet rassmotrena zavisimost' davleniya ot svobodnogo ob{sup e}ma (plotnost' topliva) i temperatury. Obolochki, izgotovlennye iz vysokoprochnykh materialov, naprimer, iz inkonelya-Kh i molibdena, mogli by vyderzhat' pri rabochikh temperaturakh davlenie gazov, vydelyayushchikhsya v rezul'tate deleniya. K sozhaleniyu, ehti materialy obladayut bolee vysokimi poperechnymi secheniyami pogloshcheniya, chem nerzhaveyushchaya stal'. Budut dany rezul'taty mnogogruppovog o

  10. The production of radioisotopes with a betatron using an internal bombarding technique; Production de radioisotopes par bombardement interne dans un betatron; Proizvodstvo radioizotopov s pomoshch'yu betatrona s ispol'zovaniem metoda vnutrennej bombardirovki; Obtencion de radioisotopos por bombardeo interno en el betatron

    Energy Technology Data Exchange (ETDEWEB)

    Morinaga, H [Department of Physics, Tohoku University, Sendai (Japan)

    1962-01-15

    pueden servir para la obtencion de isotopos. Con frecuencia es conveniente emplear isotopos de periodo corto debido a su rapida desintegracion, al hecho de que emitan radiaciones de alta energia y a la facilidad con que pueden obtenerse incluso sin necesidad de poseer conocimientos especiales. (author) [Russian] Razrabotan i uspeshno ispol'zuetsya novyj metod proizvodstva radioizotopov s vysokoj udel'noj aktivnost'yu s pomoshch'yu betatrona. Podvergaemye aktivatsii materialy pomeshchayutsya vnutr' vakuumnoj kamery betatrona v kontse slepogo tsilindra, ustanovlennogo izvne; takim obrazom, proby podvergayutsya bombardirovke pri odnoj atmosfere neposredstvenno za mishen'yu tormoznogo izlucheniya, gde intensivnost' radiatsii chrezvychajno vysoka. Aktivnost' pri nasyshchenii Cu{sup 62}, vyzvannaya v nebol'shoj chastitse medi, prevyshala 1 millikyuri, i poluchaemaya naivysshaya udel'naya aktivnost' priblizitel'no v 500 raz prevyshala aktivnost', vyzvannuyu v obychnom ustrojstve. Do sikh por ehtot metod vnutrennej misheni ispol'zuetsya tol'ko dlya rabot v oblasti yadernoj spektroskopii; bylo ustanovleno vosem' novykh vidov radioaktivnykh izotopov (Co{sup 63}, Ga{sup 75}, As{sup 81}, In{sup 121}, In{sup 123}, Tm{sup 173}, Tm{sup 175} i Ac{sup 231}). Gibkost' takogo metoda bombardirovki otkryvaet novye vozmozhnosti, t.k. meditsinskij, promyshlennyj, a takzhe issledovatel'skij betatrony mogut ispol'zovat'sya dlya proizvodstva izotopov. Korotkozhivushchie izotopy, kotorye chasto yavlyayutsya bolee udobnymi pri razlichnykh vidakh primeneniya vsledstvie ikh bystrogo raspada i obychno vysokoj ehnergii radiatsii, mogut byt' bystro polucheny bez kakogo-libo dopolnitel'nogo umeniya. (author)

  11. Radioactive Waste Control at the United Kingdom Atomic Energy Research Establishment, Harwell; Traitement des Dechets Radioactifs au Centre de Recherche sur l'Energie Atomique de Harwell; 041a 041e 041d 0422 0420 041e 041b 042c 0417 0410 0423 0414 ; Control de Desechos Radiactivos en el A.E.R.E., Harwell

    Energy Technology Data Exchange (ETDEWEB)

    Burns, R. H. [United Kingdom Atomic Energy Authority (United Kingdom)

    1960-07-01

    desechos solidos contaminados son almacenados o bien hundidos en el mar. Es importante reducir su volumen en la medida de lo posible; los metodos empleados para ello consisten en el embalado a presion, la fusion y la incineracion de los materiales combustibles. Pequenas cantidades de radiactividad pasan a la atmosfera traves de chimeneas. La purificacion de este 'aire que sale de las instalaciones se efectua generalmente mediante filtros de alta eficacia o con sistemas de filtracion por rociado. Las chimeneas son objeto de un control metodico, complementado con un amplio programa de muestreo por sectores. (author) [Russian] V dokumente izlagaetsja porjadok obrabotki radioaktivnyh othodov i kontrolja za ih udaleniem, prinjatyj v Harujelle. Zhidkie othody s nizkoj aktivnost'ju obrabatyvajutsja putem primenenija fosfatno-koaguljacionnogo metoda, a zatem otvodjatsja v Temzu. Othody so srednej aktivnost'ju otdeljajutsja i prohodjat himicheskuju obrabotku v dva jetapa, posle chego oni propuskajutsja cherez vermikulitovye kolonki. Jetot metod pozvoljaet jeffektivno udaljat' iz othodov radioaktivnyj cezij, kotoryj ne poddaetsja osazhdeniju. Zhidkie othody s vysokoj aktivnost'ju otvodjatsja v hranilishha. V nastojashhee vremja stroitsja novaja ustanovka, kotoraja pozvolit provodit' himicheskuju obrabotku takih othodov, budet imet' iono-obmenniki i daet vozmozhnost' osushhestvljat' vyparivanie othodov. Himicheskie materialy, ispol'zovannye dlja obrabotki othodov, posle obezvozhivanija i fil'trovanija otvodjatsja v more. Tverdye radioaktivnye othody libo hranjatsja, libo udaljajutsja v more. Ves'ma vazhno umen'shit' ob'em takih othodov. Dlja jetoj celi tverdye othody plavjatsja, razmel'chajutsja ili szhigajutsja. Nebol'shoe kolichestvo othodov otvoditsja v atmosferu cherez dymohodnye truby. Ochistka otvodimogo takim putem vozduha osushhestvljaetsja s pomoshh'ju vysokojeffektivnyh fil'trov. Reguljarno provoditsja dozimetricheskij kontrol' dymohodnyh trub i vzjatie prob vozduha dlja

  12. The isotope-dilution method of fluorine microestimation; Microdosage du fluor pur dilution isotopique; Mikroopredelenie ftora no metodu razbavleniya izotopov; Microvaloracion del fluor por dilucion isotopica

    Energy Technology Data Exchange (ETDEWEB)

    Kudahl, J N; Fremlin, J H; Hardwick, J L [Department of Physics, University of Birmingham (United Kingdom)

    1962-01-15

    pomeshchayutsya na opredelennuyu ploshchad' stekla, to nekotoroe kolichestvo F{sup 18} adsorbiruetsya i po ustanovlenii sostoyaniya ravnovesiya mozhet byt' zakrepleno posredstvom uvelicheniya pH. Radioaktivnost' stekla mozhet sluzhit' meroj obshchego kolichestva ftora na stekle i ehta mera mozhet byt' ispol'zovana dlya postroeniya izotermy adsorbtsii, iz kotoroj mozhno vyvesti soderzhanie ftora v neizvestnom rastvore dannoj serii. Bylo izucheno vliyanie pokazatelya rN i prisutstvie ionov kal'tsiya i fosfata i pokazano, chto organicheskie materialy mozhno szhigat' bez kakoj-libo opasnosti, esli oni soderzhat iony kal'tsiya i magniya. Tochnost' ehtogo metoda ne zavisit ot kontsentratsii ftora v rastvorakh, krepost' kotorykh mozhet vyrazhat'sya menee, chem v odnu chast' na million. (author)

  13. Plutarque juge et partie : à propos des débats entre l’Académie, le Jardin et le Portique Plutarch as judge and litigant: on the debate between Academy, Garden and Stoa Plutarco, giudice e parte in causa: sul dibattito fra l'Academia, il Giardino e il Portico

    Directory of Open Access Journals (Sweden)

    Carlos Lévy

    2013-05-01

    Full Text Available In questo articolo, cerco di mostrare che:1. L’indicazione di Plutarco (Adv. Col. 1121E-1122A di un certo numero di presocratici, fra cui Eraclito, non permette di trarne che questo pensatore fosse incluso dalla Nuova Academia fra i filosofi giudicati come propri predecessori sulla via della sospensione del giudizio.2. Il passo (1122A-F sulle critiche rivolte da Colote e da altri filosofi contro la sospensione del giudizio della Nuova Academia non permette di dedurre che la risposta a queste critiche, così come è riportata da Plutarco, provenisse dal solo Arcesilao e che avesse un carattere assertivo. Pare più ragionevole considerarla come un pastiche costruito da Plutarco sulla base di materiali diversi e con una pronunciata coloritura dialettica.3. La polemica antiepicurea (1123A-1124C condotta da Plutarco conduce a presentare l’epicureismo come una sorta di scetticismo paradossale che poggia, non sul timore di ingannarsi, ma sulla certezza che i sensi non ingannano mai. Stando a Plutarco, il principio della verità di tutte le sensazioni dovrebbe spingere gli Epicurei, se fossero conseguenti, all’afasia, ossia a una posizione che li avvicinerebbe alla forma più radicale di pirrronismo.In this article I show:(1 Plutarch’s inclusion of Heraclitus among the list of Presocratics at Adv. Col. 1121E-1122A should lead us to conclude that this philosopher was included by the New Academy among those predecessors who had advocated the suspension of judgement. (2 The passage (1122A-F that deals with Colotes’ formulation of criticisms of the New Academy’s suspension of judgement should not be taken as evidence that Plutarch’s response to these criticisms derives solely from Arcesilaus and has a positive assertive character. Rather, it is a patchwork assembled by Plutarch from various sources and has a markedly dialectical aspect. (3 Plutarch’s anti-Epicurean polemic at 1123A-1124C offers a distorted picture of Epicureanism as a

  14. Regularities in the Changes of Absorber Material Properties as a Function of Absorber Concentration; Regularite des Variations des Proprietes des Substances Absorbantes en Fonction de la Concentration de l'Absorbant; Zakonomernosti izmeneniya svojstv poglashchayushchikh materialov v zavisimosti ot kontsentratsii poglotitelya; Leyes de Variacion de las Propiedades de los Materiales Absorbentes en Funcion de la Concentracion del Absorbente

    Energy Technology Data Exchange (ETDEWEB)

    Portnoj, K. I.

    1964-06-15

    raboty v re akto r ah na teplovyh i promezhutochnyh nejtronah. Pogloshhajushhte materialy, soderzhashhie bor, naprimer boridy,obladajut nizkimi mehanicheskimi svojstvami, chto svjazano s osobennostjami ih kristallicheskoj struktury. M a terialy, soderzhashhie okisly redkozemel'nyh jelementov (samarij, evropij, gadolinij, disprozij idr.), dispergirovannye v matrice iz splava tipa nimonik ili v nerzhavejushhej stali znachitel'no izmenjajut mehanicheskie svojstva v zavisimosti ot koncentracii poglotitelja. Avtory vyskazali gipotezu ob obrazovanii maksimumo pogloshhajushhej sposobnosti pri vzaimnom legirovanii poglotitelej. Jeta gipoteza poluchila dal'nejshee podtverzhdenie opy tami s mnogimi metallicheskimi i nemetallicheskimi pogloshhajushhimi sistemami v reaktorah na teplovyh i promezhutochnyh nejtronah. (author)

  15. Apical surgery vs apical surgery with simultaneous orthograde retreatment: A prospective cohort clinical study of teeth affected by persistent periapical lesion

    Directory of Open Access Journals (Sweden)

    Carlo Prati

    2018-06-01

    questo studio sono stati confrontati pazienti trattati con chirurgia apicale convenzionale vs chirurgia apicale con ritrattamento ortogrado simultaneo. Come gruppo controllo, sono stati considerati pazienti sottoposti a ritrattamento ortogrado. Materiali e metodi: Questo studio ha incluso 83 elementi con lesioni periapicali persistente (68 pazienti. Ventotto casi di chirurgia apicale, 16 casi di chirurgia apicale con ritrattamento ortogrado simultaneo e 39 casi di ritrattamento ortogrado non chirurgico come gruppo controllo. L’indice periapicale (PAI è stato utilizzato come criterio radiografico. Gli elementi sono stati esaminati ogni 6 mesi per 24 mesi e classificati in base a criteri clinici e radiografici come guarito (assenza di sintomi e PAI≤2, in guarigione (assenza di sintomi e PAI = 3 e non guarito (presenza di sintomi o PAI≥4. A 24 mesi gli elementi guariti e in guarigione sono stati classificati come successo clinico mentre gli elementi non guariti e fratturati come fallimento. È stata eseguita un’analisi statistica sul modello multilevel GLM e regressione logistica per valutare una possibile differenza significativa tra i gruppi (p < 0.05. Risultati: Il drop-out è stato del 7% (n = 6. Sei elementi (3 dal gruppo chirurgia apicale, 2 dal gruppo chirurgia apicale con ritrattamento ortogrado simultaneo e 1 dal gruppo ritrattamento ortogrado non chirurgico sono stati estratti dopo 6-9 mesi per frattura radicolare e sono stati considerati come fallimento. Nel gruppo di chirurgia apicale si è osservato un successo clinico a 24 mesi del 78% (n = 17, nel gruppo chirurgia apicale con ritrattamento ortogrado simultaneo dell’ 81% (n = 10 e nel gruppo ritrattamento ortogrado non chirurgico dell’ 80% (n = 24. Conclusioni: Entrambe le tecniche chirurgiche hanno mostrato un’alta percentuale di successo a 24 mesi. Non ci sono state differenze significative tra i trattamenti (p = .890 a 24 mesi. È stato osservato una guarigione più rapida nel

  16. Characterization of hydrogenated fats for margarine manufacturing purposes.

    Directory of Open Access Journals (Sweden)

    Grimaldi, Renato

    1998-02-01

    Full Text Available Eight samples of hydrogenated vegetable fats were characterized by their fatty acid composition, trans isomers content and thermal behaviour, using gas chromatography (GC, infrared spectroscopy (IR, pulsed Nuclear Magnetic Resonance (pNMR and Differential Scanning Calorimetry (DSC techniques, respectively. Fatty acid composition showed some variations In relation to the unsaturated fatty acids. Trans isomer content, values varied from 22.8% to 35.6%. Solid fat content values were measured using AOCS and lUPAC methods, which differ In the tempering procedures. Values obtained by IUPAC method were higher than the AOCS ones, only at lower temperatures (10 and 21,1°C. Samples were divided Into three groups according to their solids profile: superior (C/E/G/H intermediate (F and Inferior (A/B/D. Melting and crystallization curves were obtained by Differential Scanning Calorimetry. Melting enthalpies ranged from 51.3 to 76.5 J.g-1 and crystallization enthalpies varied from -34.2 to -18.9 J.g-1 Characteristic temperatures showed little differences between the samples and each of them showed a characteristic DSC curve. All samples showed a great melting range as expected for hydrogenated fats used for margarines manufacture.

    Ocho muestras de aceites vegetales hidrogenados fueron caracterizados por su composición en ácidos grasos, contenido de isómeros trans y comportamiento térmico, usando las técnicas de cromatografía gaseosa (CG, espectroscopía Infrarrojo (IR, Resonancia Magnética Nuclear Pulsante (pRMN, Calorimetría Diferencial de Barrido (DSC, respectivamente. La composición en ácidos grasos mostró algunas variaciones respecto a los ácidos grasos insaturados. El contenido en isómeros trans varió de valores de 22,8 a 35,6%. El valor del contenido en grasa sólido fue medido usando los métodos de la AOCS y lUPAC, que difieren en los procedimientos de atemperado. Los valores obtenidos por el método l

  17. z ~ 7-10 Galaxies in the HUDF and GOODS Fields: UV Luminosity Functions

    Science.gov (United States)

    Bouwens, Rychard J.; Illingworth, Garth D.; Franx, Marijn; Ford, Holland

    2008-10-01

    We use all available deep optical ACS and near-IR data over both the HUDF and the two GOODS fields to search for star-forming galaxies at zgtrsim 7 and constrain the UV LF within the first 700 Myr. Our data set includes ~23 arcmin2 of deep NICMOS J + H data and ~248 arcmin2 of ground-based (ISAAC+MOIRCS) data, coincident with ACS optical data of greater or equal depths. In total, we find eight ~ 7.3 z-dropouts in our search fields, but no z ~ 9 J-dropout candidates. A careful consideration of a wide variety of different contaminants suggest an overall contamination level of just ~12% for our z-dropout selection. After performing detailed simulations to accurately estimate the selection volumes, we derive constraints on the UV LFs at z ~ 7 and z ~ 9. For a faint-end slope α = - 1.74, our most likely values for MUV* and phiv* at z ~ 7 are -19.8 +/- 0.4 mag and 1.1+ 1.7-0.7 × 10-3 Mpc-3, respectively. Our search results for z ~ 9 J-dropouts set a 1 σ lower limit on MUV* of -19.6 mag assuming that phiv* and α are the same as their values at slightly later times. This lower limit on MUV* is 1.4 mag fainter than our best-fit value at z ~ 4, suggesting that the UV LF has undergone substantial evolution over this time period. No evolution is ruled out at 99% confidence from z ~ 7 to z ~ 6 and at 80% confidence from z ~ 9 to z ~ 7. We find that the mass-to-light ratio of halos evolves as ~(1 + z)-1 if we require that the observed brightening in MUV* with redshift [i.e., MUV* = (- 21.02 +/- 0.09) + (0.36 +/- 0.08) (z - 3.8) ] be consistent with the expected evolution in the halo mass function. Finally, we consider the shape of the UV LF at zgtrsim 5 and discuss the implications of the Schechter-like form of the observed LFs, particularly the unexpected abrupt cutoff at the bright end. Based on observations made with the NASA/ESA Hubble Space Telescope, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5

  18. Magnetic ordering of YPd{sub 2}Si-type HoNi{sub 2}Si and ErNi{sub 2}Si compounds

    Energy Technology Data Exchange (ETDEWEB)

    Morozkin, A.V., E-mail: morozkin@tech.chem.msu.ru [Department of Chemistry, Moscow State University, Leninskie Gory, House 1, Building 3, GSP-2, Moscow, 119992 (Russian Federation); Isnard, O. [CNRS, Insitut. Néel, 25 Rue Des Martyrs BP166 x, F-38042 Grenoble (France); Université Grenoble Alpes, Inst. Néel, F-38042 Grenoble (France); Nirmala, R. [Indian Institute of Technology Madras, Chennai 600 036 (India); Quezado, S.; Malik, S.K. [Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, Natal 59082-970 (Brazil)

    2016-12-01

    Magnetic properties of YPd{sub 2}Si-type HoNi{sub 2}Si and ErNi{sub 2}Si were investigated via neutron diffraction and magnetisation measurements. HoNi{sub 2}Si and ErNi{sub 2}Si show ferromagnetic-like ordering at T{sub C} of 9 K and 7 K, respectively. The paramagnetic Weiss temperatures are 9 K and 11 K and the effective magnetic moments are 10.76 μ{sub B}/fu and 9.79 μ{sub B}/fu for HoNi{sub 2}Si and ErNi{sub 2}Si compounds, respectively. The HoNi{sub 2}Si and ErNi{sub 2}Si are soft ferromagnets with saturation magnetization of 8.1 μ{sub B}/fu and 7.5 μ{sub B}/fu, respectively at 2 K and in field of 140 kOe. The isothermal magnetic entropy change, ΔS{sub m}, has a maximum value of −15.6 J/kg·K at 10 K for HoNi{sub 2}Si and −13.9 J/kg·K at 6 K for ErNi{sub 2}Si for a field change of 50 kOe. Neutron diffraction study in zero applied field shows mixed ferromagnetic-antiferromagnetic ordering of HoNi{sub 2}Si at ~9 K and its magnetic structure is a sum of a-axis ferromagnetic F{sub a}, b-axis antiferromagnetic AF{sub b} and c-axis antiferrromagnetic AF{sub c} components of Pn′a2{sub 1}′={1, m_x′/[1/2, 1/2, 1/2], 2_y′/[0, 1/2, 0], m_z/[1/2, 0, 1/2]} magnetic space group and propagation vector K{sub 0}=[0, 0, 0]. The holmium magnetic moment reaches a value of 9.23(9) μ{sub B} at 1.5 K and the unit cell of HoNi{sub 2}Si undergoes isotropic contraction around the temperature of magnetic transition. - Graphical abstract: HoNi{sub 2}Si: mixed ferro-antiferromagnet (F{sub a}+AF{sub b}+AF{sub c}){sup K0} with Pn′a2{sub 1}′ magnetic space group and K{sub 0}=[0, 0, 0] propagation vector below 10 K. - Highlights: • Ferro-antiferromagnetic ordering is observed in HoNi{sub 2}Si at 9 K and in ErNi{sub 2}Si at 7 K. • HoNi{sub 2}Si is soft ferromagnet with ΔS{sub m} of −15.6 J/kg·K at 10 K in field of 0–50 kOe. • ErNi{sub 2}Si is soft ferromagnet with ΔS{sub m} of −13.9 J/kg·K at 6 K in field of 0–50 kOe. • HoNi{sub 2}Si shows mixed F

  19. Genetic analysis of mitochondrial DNA control region variations in four tribes of Khyber Pakhtunkhwa, Pakistan.

    Science.gov (United States)

    Bhatti, Shahzad; Aslamkhan, M; Abbas, Sana; Attimonelli, Marcella; Aydin, Hikmet Hakan; de Souza, Erica Martinha Silva

    2017-09-01

    Due to its geo strategic position at the crossroad of Asia, Pakistan has gained crucial importance of playing its pivotal role in subsequent human migratory events, both prehistoric and historic. This human movement became possible through an ancient overland network of trails called "The Silk Route" linking Asia Minor, Middle East China, Central Asia and Southeast Asia. This study was conducted to analyze complete mitochondrial control region samples of 100 individuals of four major Pashtun tribes namely, Bangash, Khattak, Mahsuds and Orakzai in the province of Khyber Pakhtunkhwa, Pakistan. All Pashtun tribes revealed high genetic diversity which is comparable to the other Central Asian, Southeast Asian and European populations. The configuration of genetic variation and heterogeneity further unveiled through Multidimensional Scaling, Principal Component Analysis and phylogenetic analysis. The results revealed that Pashtun are the composite mosaic of West Eurasian ancestry of numerous geographic origin. They received substantial gene flow during different invasive movements and have a high element of the Western provenance. The most common haplogroups reported in this study are: South Asian haplogroups M (28%) and R (8%); whereas, West Asians haplogroups are present, albeit in high frequencies (67%) and widespread over all; HV (15%), U (17%), H (9%), J (8%), K (8%), W (4%), N (3%) and T (3%). Moreover, we linked the unexplored genetic connection between Ashkenazi Jews and Pashtun. The presence of specific haplotypes J1b (4%) and K1a1b1a (5%) pointed to a genetic connection of Jewish conglomeration in Khattak tribe. This was a result of an ancient genetic influx in the early Neolithic period that led to the formation of a diverse genetic substratum in present day Pashtun.

  20. Genome-wide and expression-profiling analyses suggest the main cytochrome P450 genes related to pyrethroid resistance in the malaria vector, Anopheles sinensis (Diptera Culicidae).

    Science.gov (United States)

    Yan, Zheng-Wen; He, Zheng-Bo; Yan, Zhen-Tian; Si, Feng-Ling; Zhou, Yong; Chen, Bin

    2018-02-02

    Anopheles sinensis is one of the major malaria vectors. However, pyrethroid resistance in An. sinensis is threatening malaria control. Cytochrome P450-mediated detoxification is an important pyrethroid resistance mechanism that has been unexplored in An. sinensis. In this study, we performed a comprehensive analysis of the An. sinensis P450 gene superfamily with special attention to their role in pyrethroid resistance using bioinformatics and molecular approaches. Our data revealed the presence of 112 individual P450 genes in An. sinensis, which were classified into four major clans (mitochondrial, CYP2, CYP3 and CYP4), 18 families and 50 subfamilies. Sixty-seven genes formed nine gene clusters, and genes within the same cluster and the same gene family had a similar gene structure. Phylogenetic analysis showed that most of An. sinensis P450s (82/112) had very close 1: 1 orthology with Anopheles gambiae P450s. Five genes (AsCYP6Z2, AsCYP6P3v1, AsCYP6P3v2, AsCYP9J5 and AsCYP306A1) were significantly upregulated in three pyrethroid-resistant populations in both RNA-seq and RT-qPCR analyses, suggesting that they could be the most important P450 genes involved in pyrethroid resistance in An. sinensis. Our study provides insight on the diversity of An. sinensis P450 superfamily and basis for further elucidating pyrethroid resistance mechanism in this mosquito species. © 2018 Society of Chemical Industry. © 2018 Society of Chemical Industry.

  1. A case report of low intensity laser therapy (LILT) in the management of venous ulceration: potential effects of wound debridement upon efficacy.

    Science.gov (United States)

    Lagan, K M; Mc Donough, S M; Clements, B A; Baxter, G D

    2000-02-01

    This single case report (ABA design) was undertaken as a preliminary investigation into the clinical effects of low intensity laser upon venous ulceration, applied to wound margins only, and the potential relevance of wound debridement and wound measurement techniques to any effects observed. Ethical approval was granted by the University of Ulster's Research Ethical Committee and the patient recruited was required to attend 3 times per week for a total of 8 weeks. Treatments were carried out using single source irradiation (830 nm; 9 J/cm2, CB Medico, Copenhagen, Denmark) in conjunction with dry dressings during each visit. Assessment of wound surface area, wound appearance, and current pain were completed by an independent investigator. Planimetry and digitizing were completed for wound tracings and for photographs to quantify surface areas. Video image analysis was also performed on photographs of wounds. The primary findings were changes in wound appearance, and a decrease in wound surface area (range 33.3-46.3%), dependent on the choice of measurement method. Video image analysis was used, but rejected as an accurate method of wound measurement. Treatment intervention produced a statistically significant reduction in wound area using the C statistic on digitizing data for photographs (at Phase one only; Z = 2.412; p debridement emerged as an important procedure to be carried out prior to measuring wounds. Despite fluctuating pain levels recorded throughout the duration of the study, VAS scores showed a decrease of 15% at the end of the study. This hypoalgesic effect was, however, statistically significant (using the C statistic) at Phase one only (Z = 2.554; p types of ulceration.

  2. Coupling coefficients of SO(n) and integrals involving Jacobi and Gegenbauer polynomials

    International Nuclear Information System (INIS)

    Alisauskas, Sigitas

    2002-01-01

    The expressions for the coupling coefficients (3j-symbols) for most degenerate (symmetric) representations of orthogonal groups SO(n) in a canonical basis (with SO(n) restricted to SO(n-1) and different semicanonical or tree bases (with SO(n) restricted to SO(n')xSO(n''), n'+n''=n) are considered, respectively, in context of integrals involving triplets of the Gegenbauer and the Jacobi polynomials. Since the directly derived triple-hypergeometric series do not reveal the apparent triangle conditions of the 3j-symbols, they are rearranged, using their relation with semistretched isofactors of the second kind for the complementary chain Sp(4) contains SU(2)xSU(2) and analogy with the stretched 9j coefficients of SU(2), into formulae with more rich limits for summation intervals and obvious triangle conditions. The isofactors of class-one representations of orthogonal groups or class-two representations of unitary groups (and, of course, the related integrals involving triplets of the Gegenbauer and the Jacobi polynomials) turn into double sums in the cases of canonical SO(n) contains SO(n-1) or U(n) contains U(n-1) and semicanonical SO(n) contains SO(n-2)xSO(2) chains, as well as into the 4 F 3 (1) series under more specific conditions. Some ambiguities of the phase choice of the complementary group approach are adjusted, as well as problems with an alternating sign parameter of SO(2) representations in the SO(3) contains SO(2) and SO(n) contains SO(n-2)xSO(2) chains. (author)

  3. Comparison of Exercise Performance in Recreationally Active and Masters Athlete Women.

    Science.gov (United States)

    Stone, Matthew S; Glenn, Jordan M; Vincenzo, Jennifer L; Gray, Michelle

    2018-02-01

    Stone, MS, Glenn, JM, Vincenzo, JL, and Gray, M. Comparison of exercise performance in recreationally active and masters athlete women. J Strength Cond Res 32(2): 565-571, 2018-Master athletes (MA) are an understudied, ever-growing cohort. As such, it is important to examine how age affects muscular power and fatigability. Of particular interest is muscular power maintenance and fatigue mitigation of MA compared with young, healthy adults. The purpose of this investigation was to examine the differences in peak power, average power, total work (WRK), and fatigue index (FI) between recreationally active (RA) younger adults and female MA during anaerobic cycling exercise. Two groups, RA (n = 15; 20.6 ± 0.8 years) and MA (n = 17; 50.5 ± 8.6 years), participated in this study. Peak power, APWR, WRK, and FI were measured during a 30-second Wingate maximum anaerobic cycling protocol at a predetermined resistance of 7.5% body mass. Peak power (p = 0.92; RA: 654.1 ± 114.5 W; MA: 658.6 ± 147.6 W), APWR (p = 0.09; RA: 429.8 ± 73.3 W; MA: 384 ± 73.8 W), WRK (p = 0.09; RA: 12,894.3 ± 2,198.3 J; MA: 18,044.3 ± 27,184.9 J), and FI (p = 0.30; RA: 11.8 ± 4.1 W·s; MA: 14 ± 5.2 W·s) were not significantly different between groups. Master athletes produce power and WRK comparable to rates of fatigue among RA. This suggests that MA can maintain physical ability similar to RA in multiple parameters of high-intensity exercise while mitigating fatigue comparably. These data allow for advancements in exercise training and performance outcomes in MA populations. Further research within the MA population is warranted regarding other aspects of exercise and sport performance.

  4. Cavitation in a metallic liquid: homogeneous nucleation and growth of nanovoids.

    Science.gov (United States)

    Cai, Y; Wu, H A; Luo, S N

    2014-06-07

    Large-scale molecular dynamics (MD) simulations are performed to investigate homogeneous nucleation and growth of nanovoids during cavitation in liquid Cu. We characterize in detail the atomistic cavitation processes by following the temporal evolution of cavities or voids, analyze the nucleation behavior with the mean first-passage time (MFPT) and survival probability (SP) methods, and discuss the results against classical nucleation theory (CNT), the Tolman equation for surface energy, independent calculation of surface tension via integrating the stress profiles, the Johnson-Mehl-Avrami (JMA) growth law, and the power law for nucleus size distributions. Cavitation in this representative metallic liquid is a high energy barrier Poisson processes, and the steady-state nucleation rates obtained from statistical runs with the MFPT and SP methods are in agreement. The MFPT method also yields the critical nucleus size and the Zeldovich factor. Fitting with the Tolman's equation to the MD simulations yields the surface energy of a planar interface (~0.9 J m⁻²) and the Tolman length (0.4-0.5 Å), and those values are in accord with those from integrating the stress profiles of a planar interface. Independent CNT predictions of the nucleation rate (10(33 - 34) s(-1) m(-3)) and critical size (3-4 Å in radius) are in agreement with the MFPT and SP results. The JMA law can reasonably describe the nucleation and growth process. The size distribution of subcritical nuclei appears to follow a power law with an exponent decreasing with increasing tension owing to coupled nucleation and growth, and that of the supercritical nuclei becomes flattened during further stress relaxation due to void coalescence.

  5. Effect of low velocity impact damage on the natural frequency of composite plates

    Science.gov (United States)

    Chok, E. Y. L.; Majid, D. L. A. A.; Harmin, M. Y.

    2017-12-01

    Biodegradable natural fibers have been suggested to replace the hazardous synthetic fibers in many aerospace applications. However, this notion has been limited due to their low mechanical properties, which leads to the idea of hybridizing the two materials. Many aircraft components such as radome, aft body and wing are highly susceptible to low velocity impact damage while in-service. The damages degrade the structural integrity of the components and change their dynamic characteristics. In worst case scenario, the changes can lead to resonance, which is an excessive vibration. This research is conducted to study the dynamic characteristic changes of low velocity impact damaged hybrid composites that is designed for aircraft radome applications. Three materials, which are glass fiber, kenaf fiber and kenaf/glass fiber hybrid composites, have been impacted with 3J, 6J and 9J of energy. Cantilevered and also vertically clamped boundary conditions are used and the natural frequencies are extracted for each of the specimens. The obtained results show that natural frequency decreases with increasing impact level. Cantilevered condition is found to induce lower modes due to the gravitational pull. To eliminate mass and geometrical effects, normalized modes are computed. Among the three materials considered, glass fiber composites have displayed the highest normalized frequency that reflects on its higher stiffness compared to the other two materials. As the damage level is increased, glass fiber composites have shown the highest frequency reduction to a maximum of 35% while kenaf composites have the least frequency reduction in the range of 1 - 18%. Thus, kenaf fiber is taken to be helpful in stalling the damage progression and reducing the effect of damage. This has been proven when the percentage frequency decrement shown by kenaf/glass fiber composite lies between glass fiber and kenaf fiber composites.

  6. A study on laser welding deformation of 304 stainless steel

    International Nuclear Information System (INIS)

    Kitagawa, Akikazu; Maehara, Kenji; Takeda, Shinnosuke; Matsunawa, Akira

    2002-01-01

    In heavy industries, 304 austenitic stainless steel is the most popular material which is used for nuclear equipment, chemical vessels, vacuum vessels and so on. On the fabrication, not only a joint quality but also severe dimensional accuracy is required. To keep dimensional accuracy, considerable cost and efforts are requested, because the welding deformation of austenitic stainless steel is deeply depended on the physical properties of material itself. To decrease welding deformation, big jigs or water cooling method are commonly used which lead to the high cost. In general, the fusion welding by high energy density heat source results in less distortion. Today, laser welding technology has grown up to the stage that enables to weld thick plate with small deformation. The researches of welding deformation have been conducted intensively, but they are mainly concerned for arc welding, and studies for laser welding are very few. In this report, the authors will show the test results of deformation behavior in laser welding of 304 stainless steel. Also, they will discuss the deformation behavior comparing to that in arc welding. The main results of this study are as follows. 1. The angular distortion of laser welding can be unified by heat input parameter (Hp) which is used for arc welding deformation. 2. The angular distortion are same under the condition of Hp 3 in spite of different welding method, however under the condition of Hp>6-9 J/mm 3 the angular distortion is quite different depending on the power density of welding method. 3. Pure angular distortion seemed to complete just after welding, but following longitudinal distortion took place for long period. 4. The critical value of longitudinal distortion can be estimated from heat input parameter. The transverse deformation can be also estimated by heat input parameter. (author)

  7. Nível de conhecimentos sobre Leishmaniose Tegumentar Americana (LTA e uso de terapias alternativas por populações de uma área endêmica da Amazônia do Maranhão, Brasil

    Directory of Open Access Journals (Sweden)

    Moreira Rosilene da Conceição R.

    2002-01-01

    Full Text Available Realizou-se estudo visando identificar e comparar que conhecimentos básicos e uso de terapias alternativas relativos à Leishmaniose Tegumentar Americana (LTA, têm populações residentes em cinco áreas rurais (Sexta Vicinal, Quinta Vicinal, Trilha 410, Vila União e Buritizinho pertencentes ao município de Buriticupu, Maranhão. No período de setembro de 1997 a janeiro de 1998, aplicou-se questionários com perguntas abertas e fechadas, abordando aspectos epidemiológicos, modos de prevenção, clínica e terapêutica alternativa. A população estudada foi de 378 (19% indivíduos de um total de 1980 habitantes. Na Sexta Vicinal (35 indivíduos, Quinta Vicinal (63, Trilha 410 (96, Vila União (85 e Buritizinho (99. Dos entrevistados, 72% tinham poucos conhecimentos dos modos de transmissão, 96,9% já ouviram falar da doença, a maioria obteve informações com amigos, 60,7% conheciam a LTA como lésh. O Glucantime foi a droga mais citada para o tratamento, 29,6% relataram uso de plantas no local da lesão. O Citrus limon (limão foi a planta mais citada (15,4% dos entrevistados, o modo de uso mais freqüente era o pó espalhado sobre a lesão. Conclui-se que o nível de conhecimento sobre LTA foi incipiente, principalmente na prevenção e terapêutica, situação similar nas cinco áreas estudadas.

  8. High resolution imaging of colliding blast waves in cluster media

    Energy Technology Data Exchange (ETDEWEB)

    Smith, Roland A [Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2AZ (United Kingdom); Lazarus, James [Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2AZ (United Kingdom); Hohenberger, Matthias [Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2AZ (United Kingdom); Marocchino, Alberto [Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2AZ (United Kingdom); Robinson, Joseph S [Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2AZ (United Kingdom); Chittenden, Jeremy P [Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2AZ (United Kingdom); Moore, Alastair S [Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2AZ (United Kingdom); Gumbrell, Edward T [Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2AZ (United Kingdom); Dunne, Mike [Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 OQX (United Kingdom)

    2007-12-15

    Strong shocks and blast wave collisions are commonly observed features in astrophysical objects such as nebulae and supernova remnants. Numerical simulations often underpin our understanding of these complex systems, however modelling of such extreme phenomena remains challenging, particularly so for the case of radiative or colliding shocks. This highlights the need for well-characterized laboratory experiments both to guide physical insight and to provide robust data for code benchmarking. Creating a sufficiently high-energy-density gas medium for conducting scaled laboratory astrophysics experiments has historically been problematic, but the unique ability of atomic cluster gases to efficiently couple to intense pulses of laser light now enables table top scale (1 J input energy) studies to be conducted at gas densities of >10{sup 19} particles cm{sup -3} with an initial energy density >5 x 10{sup 9} J g{sup -1}. By laser heating atomic cluster gas media we can launch strong (up to Mach 55) shocks in a range of geometries, with and without radiative precursors. These systems have been probed with a range of optical and interferometric diagnostics in order to retrieve electron density profiles and blast wave trajectories. Colliding cylindrical shock systems have also been studied, however the strongly asymmetric density profiles and radial and longitudinal mass flow that result demand a more complex diagnostic technique based on tomographic phase reconstruction. We have used the 3D magnetoresistive hydrocode GORGON to model these systems and to highlight interesting features such as the formation of a Mach stem for further study.

  9. FT-Raman spectroscopic analysis of Nd:YAG and Er,Cr:YSGG laser irradiated enamel for preventive purposes

    Science.gov (United States)

    Ana, P. A.; Kauffmann, C. M. F.; Bachmann, L.; Soares, L. E. S.; Martin, A. A.; Gomes, A. S. L.; Zezell, D. M.

    2014-03-01

    This study evaluated the effect of combining laser irradiation with fluoride on an enamel microstructure and demineralization by FT-Raman spectroscopy (FTRS). Eighty human enamel slabs were divided into eight groups: (G1) untreated; (G2) acidulated phosphate fluoride application (APF—1.23% F- for 4 min) (G3) Nd:YAG irradiation (84.9 J cm-2, 60 mJ/pulse) (G4) Nd:YAG + APF; (G5) APF + Nd:YAG; (G6) Er,Cr:YSGG irradiation (2.8 J cm-2, 12.5 mJ/pulse) (G7) Er,Cr:YSGG + APF; and (G8) APF + Er,Cr:YSGG. After treatment, the samples were submitted to a ten-day pH-cycling model. Chemical changes were determined on the slabs before and after treatment, and also after pH-cycling, by FTRS in the range 400-4000 cm-1. The inorganic bands at 440, 590, 870, 960, 1100 cm-1, and the organic bands at 1270, 1450, 1670, 2945 cm-1 were considered. Demineralization promoted reduction in organic contents; Nd:YAG laser irradiation promoted loss of carbonate and organic content, while Er,Cr:YSGG did not produce significant changes in the relative band intensities of organic and inorganic contents of the enamel. In lased samples, no effects caused by pH-cycling on enamel were observed. In conclusion, laser treatment and its association with fluoride can somehow interfere with the demineralization dynamics, reducing its effects over the enamel.

  10. Concept of a Series-Parallel Elastic Actuator for a Powered Transtibial Prosthesis

    Directory of Open Access Journals (Sweden)

    Bram Vanderborght

    2013-07-01

    Full Text Available The majority of the commercial transtibial prostheses are purely passive devices. They store energy in an elastic element during the beginning of a step and release it at the end. A 75 kg human, however, produces on average 26 J of energy during one stride at the ankle joint when walking at normal cadence and stores/releases 9 J of energy, contributing to energy efficient locomotion. According to Winter, a subject produces on average of 250W peak power at a maximum joint torque of 125 Nm. As a result, powering a prosthesis with traditional servomotors leads to excessive motors and gearboxes at the outer extremities of the legs. Therefore, research prototypes use series elastic actuation (SEA concepts to reduce the power requirements of the motor. In the paper, it will be shown that SEAs are able to reduce the power of the electric motor, but not the torque. To further decrease the motor size, a novel human-centered actuator concept is developed, which is inspired by the variable recruitment of muscle fibers of a human muscle. We call this concept series-parallel elastic actuation (SPEA, and the actuator consists of multiple parallel springs, each connected to an intermittent mechanism with internal locking and a single motor. As a result, the motor torque requirements can be lowered and the efficiency drastically increased. In the paper, the novel actuation concept is explained, and a comparative study between a stiff motor, an SEA and an SPEA, which all aim at mimicking human ankle behavior, is performed.

  11. Characterization of caries progression on dentin after irradiation with Nd:YAG laser by FTIR spectroscopy and fluorescence imaging

    Science.gov (United States)

    Ana, P. A.; Brito, A. M. M.; Zezell, D. M.; Lins, E. C. C. C.

    2015-06-01

    Considering the use of high intensity lasers for preventing dental caries, this blind in vitro study evaluated the compositional and fluorescence effects promoted by Nd:YAG laser (λ=1064 nm) when applied for prevention of progression of dentin caries, in association or not with topical application of acidulated phosphate fluoride (APF). Sixty bovine root dentin slabs were prepared and demineralized by 32h in order to create early caries lesions. After, the slabs were distributed into six experimental groups: G1- untreated and not submitted to a pH-cycling model; G2- untreated and submitted to a pH-cycling model; G3- acidulated phosphate fluoride application (APF); G4- Nd:YAG irradiation (84.9 J/cm2, 60 mJ/pulse); G5- treated with Nd:YAG+APF; G6- treated with APF+Nd:YAG. After treatments, the samples of groups G2 to G6 were submitted to a 4-day pH-cycling model in order to simulate the progression of early caries lesions. All samples were characterized by the micro-attenuated total reflection technique of Fourier transformed infrared spectroscopy (μATR-FTIR), using a diamond crystal, and by a fluorescence imaging system (FIS), in which it was used an illuminating system at λ= 405±30 nm. Demineralization promoted reduction in carbonate and phosphate contents, exposing the organic matter; as well, it was observed a significant reduction of fluorescence intensity. Nd:YAG laser promoted additional chemical changes, and increased the fluorescence intensity even with the development of caries lesions. It was concluded that the compositional changes promoted by Nd:YAG, when associated to APF, are responsible for the reduction of demineralization progression observed on root dentin.

  12. What is the best treatment to decrease pro-inflammatory cytokine release in acute skeletal muscle injury induced by trauma in rats: low-level laser therapy, diclofenac, or cryotherapy?

    Science.gov (United States)

    de Almeida, Patrícia; Tomazoni, Shaiane Silva; Frigo, Lucio; de Carvalho, Paulo de Tarso Camillo; Vanin, Adriane Aver; Santos, Larissa Aline; Albuquerque-Pontes, Gianna Móes; De Marchi, Thiago; Tairova, Olga; Marcos, Rodrigo Labat; Lopes-Martins, Rodrigo Álvaro Brandão; Leal-Junior, Ernesto Cesar Pinto

    2014-03-01

    Currently, treatment of muscle injuries represents a challenge in clinical practice. In acute phase, the most employed therapies are cryotherapy and nonsteroidal anti-inflammatory drugs. In the last years, low-level laser therapy (LLLT) has becoming a promising therapeutic agent; however, its effects are not fully known. The aim of this study was to analyze the effects of sodium diclofenac (topical application), cryotherapy, and LLLT on pro-inflammatory cytokine levels after a controlled model of muscle injury. For such, we performed a single trauma in tibialis anterior muscle of rats. After 1 h, animals were treated with sodium diclofenac (11.6 mg/g of solution), cryotherapy (20 min), or LLLT (904 nm; superpulsed; 700 Hz; 60 mW mean output power; 1.67 W/cm(2); 1, 3, 6 or 9 J; 17, 50, 100 or 150 s). Assessment of interleukin-1β and interleukin-6 (IL-1β and IL-6) and tumor necrosis factor-alpha (TNF-α) levels was performed at 6 h after trauma employing enzyme-linked immunosorbent assay method. LLLT with 1 J dose significantly decreased (p cryotherapy groups. On the other hand, treatment with diclofenac and cryotherapy does not decrease pro-inflammatory cytokine levels compared to the non-treated injured group. Therefore, we can conclude that 904 nm LLLT with 1 J dose has better effects than topical application of diclofenac or cryotherapy in acute inflammatory phase after muscle trauma.

  13. Effects of oxytocin on high intensity focused ultrasound (HIFU) ablation of adenomysis: A prospective study

    International Nuclear Information System (INIS)

    Zhang, Xin; Zou, Min; Zhang, Cai; He, Jia; Mao, Shihua; Wu, Qingrong; He, Min; Wang, Jian; Zhang, Ruitao; Zhang, Lian

    2014-01-01

    Objective: To investigate the effects of oxytocin on high-intensity focused ultrasound (HIFU) ablation for the treatment of adenomyosis. Materials and methods: Eighty-six patients with adenomyosis from three hospitals were randomly assigned to the oxytocin group or control group for HIFU treatment. During HIFU treatment, 80 units of oxytocin was added in 500 ml of 0.9% normal saline running at the rate of 2 ml/min (0.32 U/min) in the oxytocin group, while 0.9% normal saline was used in the control group. Both patients and HIFU operators were blinded to oxytocin or saline application. Treatment results, adverse effects were compared. Results: When using oxytocin, the non-perfused volume (NPV) ratio was 80.7 ± 11.6%, the energy-efficiency factor (EEF) was 8.1 ± 9.9 J/mm 3 , and the sonication time required to ablate 1 cm 3 was 30.0 ± 36.0 s/cm 3 . When not using oxytocin, the non-perfused volume ratio was 70.8 ± 16.7%, the EEF was 15.8 ± 19.6 J/mm 3 , and the sonication time required to ablate 1 cm 3 was 58.2 ± 72.7 S/cm 3 . Significant difference in the NPV ratio, EEF, and the sonication time required to ablate 1 cm 3 between the two groups was observed. No oxytocin related adverse effects occurred. Conclusion: Oxytocin could significantly decrease the energy for ablating adenomyosis with HIFU, safely enhance the treatment efficiency

  14. Quantitative measurement of ventricular dilatation on CT scan

    International Nuclear Information System (INIS)

    Okita, Naoshi; Mochizuki, Hiroshi; Takase, Sadao

    1985-01-01

    Cerebral atrophy might be judged from the ventricular dilatation with some indices, calculated from various ventricular width. But, there is no general agreement on what index is the most reliable. In this paper, we attempted to establish the index, easy to measure and most reliable. Our method is as follow. 1) We carried out the CT scan (EMI 1010) on 89 neurologically intact patients. Scans were parallel to orbito-meatal line (OML), and were 10 mm in thickness. On CT scan films, various width, area of anterior horns and area of bodies of lateral ventricles were measured. Measurement about the anterior horns of lateral ventricles were carried out on image the most clearly showed the foramen of Monro. And measurements about the bodies of lateral ventricles were on image, 20 mm above the image of anterior horn. Correlations of various width and areas were calculated. Then we proposed new indices with high correlations (over 0.9) with ventricular area; Anterior horn CVI (Cerebro-Ventricular Index) and Body CVI. 2) Patients with myotonic dystrophy show cerebral atrophy. We carried out the CT scan (GECT/T 8800) on 17 myotonic dystrophy patients and 30 controls. Between the two groups, age and sex were almost matched. In the two groups, we calculated our new indices as well as various indices which have been reported; Huckman number, Bifrontal CVI, Bicaudal CVI, Anterior horn index, Hirajima's index, and Cella-media index. The data were analyzed statistically. The ventricular dilatation of myotonic dystrophy patients is more definite with Anterior horn CVI, Bicaudal CVI and Body CVI (p<0.01). These indices have higher correlations with the ventricular area (about 0.9). (J.P.N.)

  15. Comparative analysis of serial and parallel laser patterning of Ag nanowire thin films

    Energy Technology Data Exchange (ETDEWEB)

    Oh, Harim; Lee, Myeongkyu, E-mail: myeong@yonsei.ac.kr

    2017-03-31

    Highlights: • Serial and parallel laser patterning of Ag nanowire thin films is comparatively analyzed. • AgNW film can be directly patterned by a spatially-modulated pulsed Nd:YAG laser beam. • An area of 2.24 cm{sup 2} can be simultaneously patterned by a single pulse with energy of 350 mJ. - Abstract: Ag nanowire (AgNW) films solution-coated on a glass substrate were laser-patterned in two different ways. For the conventional serial process, a pulsed ultraviolet laser of 30 kHz repetition rate and ∼20 ns pulse width was employed as the laser source. For parallel patterning, the film was directly irradiated by a spatially-modulated Nd:YAG laser beam that has a low repetition rate of 10 kHz and a shorter pulse width of 5 ns. While multiple pulses with energy density ranging from 3 to 9 J/cm{sup 2} were required to pattern the film in the serial process, a single pulse with energy density of 0.16 J/cm{sup 2} completely removed AgNWs in the parallel patterning. This may be explained by the difference in patterning mechanism. In the parallel process using short pulses of 5 ns width, AgNWs can be removed in their solid state by the laser-induced thermo-elastic force, while they should be evaporated in the serial process utilizing a high-repetition rate laser. Important process parameters such as threshold energy density, speed, and available feature sizes are comparatively discussed for the two patterning.

  16. Influence of hot rolling and high speed hydrostatic extrusion on the microstructure and mechanical properties of an ODS RAF steel

    Energy Technology Data Exchange (ETDEWEB)

    Oksiuta, Z., E-mail: oksiuta@pb.edu.pl [Bialystok Technical University, Faculty of Mechanical Engineering, Wiejska 45c, 15-352 Bialystok (Poland); Lewandowska, M.; Kurzydlowski, K.J. [Warsaw University of Technology, Faculty of Materials Science and Engineering, Woloska 141, 02-504 Warsaw (Poland); Baluc, N. [Ecole Polytechnique Federale de Lausanne (EPFL), Centre de Recherches en Physique des Plasmas, Association Euratom-Confederation Suisse, 5232 Villigen PSI (Switzerland)

    2011-02-15

    An argon gas atomized, pre-alloyed Fe-14Cr-2W-0.3Ti (wt.%) reduced activation ferritic (RAF) steel powder was mechanically alloyed with 0.3wt.% Y{sub 2}O{sub 3} nano-particles in an attritor ball mill and consolidated by hot isostatic pressing at 1150 {sup o}C under a pressure of 200 MPa for 3 h. In the aim to improve its mechanical properties the ODS steel was then submitted to a thermo-mechanical treatment (TMT): hot rolling (HR) at 850 deg. C or high speed hydrostatic extrusion (HSHE) at 900 deg. C, followed by heat treatment (HT). Transmission electron microscopy (TEM) observations of the ODS alloys after TMT and heat treatment revealed the presence of elongated grains in the longitudinal direction, with an average width of 8 {mu}m and an average length of 75 {mu}m, and equiaxed grains, a few microns in diameter, in the transverse direction. Two populations of oxide particles were observed by TEM: large Ti-Al-O particles, up to 250 nm in diameter, usually located at the grain boundaries and small Y-Ti-O nanoclusters, about 2.5 nm in diameter, uniformly distributed in the matrix. Charpy impact tests revealed that the HSHE material exhibits a larger upper shelf energy (5.8 J) than the HR material (2.9 J). The ductile-to-brittle transition temperature of both alloys is relatively high, in the range of 55-72 deg. C. Tensile mechanical properties of both ODS alloys were found satisfactory over the full range of investigated temperatures (23-750 deg. C). The HSHE material exhibits better tensile strength and ductility than the HR material. These results indicate that HSHE can be considered as a promising TMT method for improving the mechanical properties of ODS RAF steels.

  17. Nd:YAG laser in caries prevention: a clinical study; Avaliacao clinica da eficiencia do laser de Nd:YAG associado ao fluor fosfato acidulado na prevencao de caries de sulcos e fissuras de criancas e adolescentes

    Energy Technology Data Exchange (ETDEWEB)

    Boari, Heloisa Gomes Dimiranda

    2000-07-01

    The caries prevention by using laser irradiation has been investigated during the last 30 years. The Nd: YAG laser associated with acidulated phosphate fluoride has been shown as a very promising technique for enamel caries prevention. The aim of this work was to clinically evaluate the efficiency of Nd: YAG laser associated with acidulated phosphate fluoride in pit and fissure caries prevention of children and adolescents. In this work it was determined the dye that enhance the effect of Nd: YAG laser in enamel. It was selected 242 pre-molar and molar teeth from 33 children and adolescents, aged from 7 to 15 years old. The selected teeth were free from caries or decalcification marks (active white marks) to the clinical and radiographic exams. The teeth were divided into two groups: the first group was laser irradiated and their homologous remained as a control. The right side teeth were dye-assisted Nd:YAG laser irradiated. The dye solution was a moisture of dust coal and equal parts of water and alcohol. The irradiation conditions were 60 mJ/10 Hz, optical fiber in contact mode, with diameter of 300 {mu}m, resulting in an energy density of 84,9 J/cm{sup 2}. The oclusal surface of the teeth was completely irradiated, specially on the slopes and in the deepest part of the pits and fissures. This procedure was repeated three times. In the sequence it was applied the acidulated phosphate fluoride for 4 minutes. On the left side teeth - control group- only acidulated phosphate fluoride was applied for the same time. The final examination considered the presence of caries and active white marks after a period of one year. There were statistical significant differences (p < 0.01) between the lased + fluoride group and the non irradiated group. The present study concluded that the technique used in this work can be an alternative clinical method for caries prevention. (author)

  18. Efficacy of the Q-switched Neodymium: Yttrium Aluminum Garnet Laser in the Treatment of Blue-black Amateur and Professional Tattoos.

    Science.gov (United States)

    Lakshmi, Chembolli; Krishnaswamy, Gayathri

    2015-01-01

    Q-switched neodymium: yttrium aluminum garnet (Nd: YAG) laser at a wavelength of 1064 nm primarily targets dermal melanin and black tattoo ink. Recent studies have shown that this laser is effective in treating black tattoos. There are few studies conducted in India for the same. The aim was to assess the effectiveness of Q-switched Nd: YAG laser (QSNYL) in the treatment of blue-black tattoos following 3 treatment sessions. This study, a prospective interventional study included a total of 12 blue-black tattoos. Following informed consent for the procedure, as well as for photographs, a questionnaire was administered, and improvement perceived by the patient was recorded. In addition, global assessment score (GAS) by a blinded physician was also recorded. Photographs were taken at baseline and at every follow-up. Each patient underwent three treatment sessions with 1064 nm QSNYL at 4-6 weekly intervals. Fluences ranged from 1.8 to 9 J/cm(2). The follow-up was done monthly for 4 months from the first treatment session. The response was assessed by patient assessment (PA) and GAS by comparing photographs. After three treatment sessions, although no patient achieved clearance, most patients showed good response with few adverse effects. An average of 64.1% (GAS) and 54.2% (PA) improvement was observed in 12 tattoos. Tattoos more than 10-year-old showed quicker clearing than those less than 10-year-old. Amateur tattoos also showed a better response in comparison to professional tattoos. Totally, 1064 nm QSNYL is safe and effective for lightening blue-black tattoos in pigmented Indian skin. All patients achieved near complete clearance following the continuation of treatment (an average of six sessions) although this was spaced at longer intervals.

  19. Accuracy of automatic tube compensation in new-generation mechanical ventilators.

    Science.gov (United States)

    Elsasser, Serge; Guttmann, Josef; Stocker, Reto; Mols, Georg; Priebe, Hans-Joachim; Haberthür, Christoph

    2003-11-01

    To compare performance of flow-adapted compensation of endotracheal tube resistance (automatic tube compensation, ATC) between the original ATC system and ATC systems incorporated in commercially available ventilators. Bench study. University research laboratory. The original ATC system, Dräger Evita 2 prototype, Dräger Evita 4, Puritan-Bennett 840. The four ventilators under investigation were alternatively connected via different sized endotracheal tubes and an artificial trachea to an active lung model. Test conditions consisted of two ventilatory modes (ATC vs. continuous positive airway pressure), three different sized endotracheal tubes (inner diameter 7.0, 8.0, and 9.0 mm), two ventilatory rates (15/min and 30/min), and four levels of positive end-expiratory pressure (0, 5, 10, and 15 cm H2O). Performance of tube compensation was assessed by the amount of tube-related (additional) work of breathing (WOBadd), which was calculated on the basis of pressure gradient across the endotracheal tube. Compared with continuous positive airway pressure, ATC reduced inspiratory WOBadd by 58%, 68%, 50%, and 97% when using the Evita 4, the Evita 2 prototype, the Puritan-Bennett 840, and the original ATC system, respectively. Depending on endotracheal tube diameter and ventilatory pattern, inspiratory WOBadd was 0.12-5.2 J/L with the original ATC system, 1.5-28.9 J/L with the Puritan-Bennett 840, 10.4-21.0 J/L with the Evita 2 prototype, and 10.1-36.1 J/L with the Evita 4 (difference between each ventilator at identical test situations, p ventilator (p <.025). Flow-adapted tube compensation by the original ATC system significantly reduced tube-related inspiratory and expiratory work of breathing. The commercially available ATC modes investigated here may be adequate for inspiratory but probably not for expiratory tube compensation.

  20. Histidine Metabolism and IGPD Play a Key Role in Cefquinome Inhibiting Biofilm Formation of Staphylococcus xylosus

    Directory of Open Access Journals (Sweden)

    Yong-hui Zhou

    2018-04-01

    Full Text Available Staphylococcus xylosus (S. xylosus is an AT-rich and coagulase-negative Staphylococcus (CNS. It is normally regarded as non-pathogenic, however, recent studies have demonstrated that it is related to human opportunistic infections and bovine mastitis. In addition, S. xylosus strains have the ability to form biofilm. Biofilms are also involved in chronic infections and antibiotic resistance, there are only a few reports about cefquinome inhibiting S. xylosus biofilm formation and the protein targets of cefquinome. In our study, we found that sub-MICs of cefquinome were sufficient to inhibit biofilm formation. To investigate the potential protein targets of cefquinome, we used iTRAQ for the analyses of cells at two different conditions: 1/2-MIC (0.125 μg/mL cefquinome treatment and no treatment. Using iTRAQ technique and KEGG database analysis, we found that proteins differently expression in histidine metabolism pathway may play a role in the process by which 1/2-MIC (0.125 μg/mL cefquinome inhibits S. xylosus biofilm formation. Interestingly, we found a sharply down-regulated enzyme [A0A068E9J3 imidazoleglycerol-phosphate dehydratase (IGPD] involved in histidine metabolism pathway in cefquinome-treated cells. We demonstrated the important role of IGPD in sub-MICs cefquinome inhibiting biofilm formation of S. xylosus by gene (hisB knockout, IGPD enzyme activity and histidine content assays. Thus, our data sheds light on important role of histidine metabolism in S. xylosus biofilm formation; especially, IGPD involved in histidine metabolism might play a crucial role in sub-MICs cefquinome inhibition of biofilm formation of S. xylosus, and we propose IGPD as an attractive protein target of cefquinome.

  1. Eficiência de extratos vegetais e urina de vaca no controle de Neoleucinodes elegantalis (Guenée, 1854 (Lepidoptera: Pyralidae e Bemisia sp (Hemiptera: Aleurodidae em tomateiro orgânico

    Directory of Open Access Journals (Sweden)

    Maria Socorro Rocha Melo Peixoto

    2013-05-01

    Full Text Available O cultivo do tomateiro (Lycopersicum esculentum Mill ocupa o segundo lugar entre as culturas oleráceas no Brasil (IBGE, 2008, GRAVENA, 1998. Com a expansão da cultura, devido suas qualidades organolépticas, fonte natural de vitaminas, sais minerais e outros metabólitos entre eles o licopeno, os problemas fitossanitários vêm-se agravando. Assim é que, desde a semeadura até a colheita, grande número de pragas e doenças ocorre na cultura do tomateiro. Considerando-se a carência de estudos voltados para utilização de plantas com ação inseticidas e urina de vaca, esse trabalho tem como objetivo avaliar suas eficiências no controle de N. elegantalis e Bemisia sp na cultura do tomate. A pesquisa foi desenvolvida em área experimental da Escola Agrícola “Assis Chateaubriand” e no Núcleo de Manejo de Pragas pertencentes a Universidade Estadual da Paraíba. Resultados: Constatou-se que a associação dos produtos químicos com dipel apresentou maior eficiência no controle para N. elegantalise Bemisia na fase pupal de 95 e 93%, respectivamente em relação aos demais produtos testados. Dentre os tratamentos alternativos a melhor eficiência para N. elegantalis foi obtida com extrato de faveleira (53,6% e extrato de óleo de neem (43,9%, já para a fase pulpal da Bemisia o extrato de óleo de neem apresentou 66,3% de eficiência, em aplicações a cada 4 dias.  Palavras - chave: pragas, extratos vegetais, tomateiro.

  2. Effect of photodynamic therapy in the reduction of halitosis in patients with multiple sclerosis: clinical trial.

    Science.gov (United States)

    Gonçalves, Marcela Leticia Leal; Kalil Bussadori, Sandra; Dadalti Fragoso, Yara; da Silva, Vinicius Vieira Belarmino; Melo Deana, Alessandro; da Mota, Ana Carolina Costa; Horácio Pinto, Erika; Horliana, Anna Carolina RattoTempestini; Miranda França, Cristiane

    2017-10-27

    Smell and odours play a vital role in social interaction. Halitosis is a social problem that affects one third of the population, causing a negative impact on the quality of life. There is little knowledge on the prevalence and management of halitosis in multiple sclerosis (MS) patients. The present study aims to evaluate the presence of halitosis in patients with MS when compared to a control group, and also evaluate treatment of the problem with antimicrobial photodynamic therapy (aPDT). This is a case-control clinical study in which 60 patients were evaluated: 30 MS patients in treatment at the Specialties Clinic School of Medicine, and 30 healthy patients, matched in age and gender for the control group. Data was collected on the duration of the disease as well as the degree of disability and medication use in the MS group. For all patients, halitosis was assessed with Oral Chroma™. Individuals with halitosis underwent treatment with tongue scraping and aPDT. The photosensitizer was methylene blue (0.005%) and a THERAPY XT-EC ® laser (660 nm, 9 J, 100 mW for 90 s per point, 320 J cm -2 , 3537 mW cm -2 ) was used. Six points 1 cm apart from each other were irradiated in the tongue dorsum. There was a positive correlation between the disability and disease duration. No parameter was correlated with halitosis. Patients with MS have higher levels of SH 2 compounds when compared to the control group (p = 0.003, Mann-Whitney), but after aPDT both groups significantly reduced the levels to under the halitosis threshold. The aPDT scraping treatment was effective in the immediate reduction of halitosis in both groups.

  3. Gamma knife radiosurgery for ten or more brain metastases. Analysis of the whole brain irradiation doses

    International Nuclear Information System (INIS)

    Nakaya, Kotaro; Hori, Tomokatsu; Izawa, Masahiro; Yamamoto, Masaaki

    2002-01-01

    Gamma knife (GK) radiosurgery has recently been recognized as the most powerful treatment modality in managing patients with brain metastasis, be they radioresistant or not, solitary or multiple. Very recently, this treatment has been employed in patients with numerous brain metastases, even those with 10 or more lesions. However, cumulative irradiation doses to the whole brain, with such treatment, remain unknown. Since the Gamma Plan ver. 5.10 (ver. 5.30 is presently available, Leksell Gamma Plan) became available in November, 1998, 105 GK procedures have been performed at our two facilities, Tokyo Women's Medical University and Katsuta Hospital Mito Gamma House. The median lesion number was 17, ranging 10-43, and the median cumulative volume of all tumors was 8.72 cm 3 , ranging 0.41-81.41 cm 3 . The selected doses at the lesion periphery ranged 12-25 Gy, the median being 20 Gy. Based on these treatment protocols, the cumulative irradiation dose was computed. The median cumulative irradiation dose to the whole brain was 4.83, ranging 2.16-8.51 Gy: the median integrated dose to the whole brain was 6.2 J, ranging 2.16-11.9 J. The median brain volumes receiving ≥2, ≥5, ≥10, ≥15 and ≥20 Gy were 1105 (range: 410-1501), 309 (46-1247), 64 (13-282), 24 (2-77), and 8 (0-40) cm 3 , respectively. The cumulative whole brain irradiation doses for patients with numerous radiosurgical targets were considered not to exceed the threshold level of normal brain necrosis. (author)

  4. Photoactive dye enhanced tissue ablation for endoscopic laser prostatectomy

    Science.gov (United States)

    Ahn, Minwoo; Nguyen, Trung Hau; Nguyen, Van Phuc; Oh, Junghwan; Kang, Hyun Wook

    2015-02-01

    Laser light has been widely used as a surgical tool to treat benign prostate hyperplasia with high laser power. The purpose of this study was to validate the feasibility of photoactive dye injection to enhance light absorption and eventually to facilitate tissue ablation with low laser power. The experiment was implemented on chicken breast due to minimal optical absorption Amaranth (AR), black dye (BD), hemoglobin powder (HP), and endoscopic marker (EM), were selected and tested in vitro with a customized 532-nm laser system with radiant exposure ranging from 0.9 to 3.9 J/cm2. Light absorbance and ablation threshold were measured with UV-VIS spectrometer and Probit analysis, respectively, and compared to feature the function of the injected dyes. Ablation performance with dye-injection was evaluated in light of radiant exposure, dye concentration, and number of injection. Higher light absorption by injected dyes led to lower ablation threshold as well as more efficient tissue removal in the order of AR, BD, HP, and EM. Regardless of the injected dyes, ablation efficiency principally increased with input parameter. Among the dyes, AR created the highest ablation rate of 44.2+/-0.2 μm/pulse due to higher absorbance and lower ablation threshold. Preliminary tests on canine prostate with a hydraulic injection system demonstrated that 80 W with dye injection yielded comparable ablation efficiency to 120 W with no injection, indicating 33 % reduced laser power with almost equivalent performance. In-depth comprehension on photoactive dye-enhanced tissue ablation can help accomplish efficient and safe laser treatment for BPH with low power application.

  5. Postembryonic development of Antygomonas incomitata (Kinorhyncha: Cyclorhagida).

    Science.gov (United States)

    Sørensen, Martin V; Accogli, Gianluca; Hansen, Jesper G

    2010-07-01

    Postembryonic development in the kinorhynch species Antygomonas incomitata was examined using scanning electron microscopy. The morphology of the six juvenile stages, J-1 to J-6, varies at numerous details, but they can also be distinguished by a few key characters. Juvenile stage 1 by its composition of only nine trunk segments; J-2 by the combination of possessing 10 trunk segments, but no cuspidate spines on segment 9; J-3 by the presence of cuspidate spines on segment 9, but only one pair of cuspidate spines on segment 8; J-4 by the combination of 10 trunk segments only, but having two pairs of cuspidate spines on segment 8; J-5 by possessing 11 trunk segments and same spine compositions as adults but is still maintaining postmarginal spiculae; J-6 specimens closely resemble adults and are most easily identified by their reduced trunk lengths. New segments are formed in a growth zone in the anterior part of the terminal segment. The complete number of segments is reached in J-5. Development of cuticular head and trunk structures are described through all postembryonic stages and following developmental patterns could be outlined: the mouth cone possesses outer oral styles from J-1, but in J-1 to J-3, the styles alternate in size. Scalids of the introvert are added after each molt, and scalids appear earliest in the anterior rings, whereas scalids in more posterior rings are added in older postembryonic stages. The early J-1 stage is poor in spines and sensory spots and both structures increase in number after each molt. The complete spine composition is reached in J-4, whereas new sensory spots appear after all molts, inclusive the final one from J-6 to adult. Sensory spots in the paraventral positions often appear as Type 3 sensory spots but are through development transformed to Type 2. This transformation happens earliest on the anterior segments.

  6. Liquid egg white pasteurization using a centrifugal UV irradiator.

    Science.gov (United States)

    Geveke, David J; Torres, Daniel

    2013-03-01

    Studies are limited on UV nonthermal pasteurization of liquid egg white (LEW). The objective of this study was to inactivate Escherichia coli using a UV irradiator that centrifugally formed a thin film of LEW on the inside of a rotating cylinder. The LEW was inoculated with E. coli K12 to approximately 8 log cfu/ml and was processed at the following conditions: UV intensity 1.5 to 9.0 mW/cm²; cylinder rotational speed 450 to 750 RPM, cylinder inclination angle 15° to 45°, and flow rate 300 to 900 ml/min, and treatment time 1.1 to 3.2s. Appropriate dilutions of the samples were pourplated with tryptic soy agar (TSA). Sublethal injury was determined using TSA+4% NaCl. The regrowth of surviving E. coli during refrigerated storage for 28 days was investigated. The electrical energy of the UV process was also determined. The results demonstrated that UV processing of LEW at a dose of 29 mJ/cm² at 10°C reduced E. coli by 5 log cfu/ml. Inactivation significantly increased with increasing UV dose and decreasing flow rate. The results at cylinder inclination angles of 30° and 45° were similar and were significantly better than those at 15°. The cylinder rotational speed had no significant effect on inactivation. The occurrence of sublethal injury was detected. Storage of UV processed LEW at 4° and 10°C for 21 days further reduced the population of E. coli to approximately 1 log cfu/ml where it remained for an additional 7 days. The UV energy applied to the LEW to obtain a 5 log reduction of E. coli was 3.9 J/ml. These results suggest that LEW may be efficiently pasteurized, albeit at low flow rates, using a nonthermal UV device that centrifugally forms a thin film. Published by Elsevier B.V.

  7. Human amnion-derived mesenchymal stem cells protect against UVA irradiation-induced human dermal fibroblast senescence, in vitro

    Science.gov (United States)

    Zhang, Chunli; Yuchi, Haishen; Sun, Lu; Zhou, Xiaoli; Lin, Jinde

    2017-01-01

    The aim of the present study was to determine if human amnion-derived mesenchymal stem cells (HAMSCs) exert a protective effect on ultraviolet A (UVA) irradiation-induced human dermal fibroblast (HDF) senescence. A senescence model was constructed as follows: HDFs (104–106 cells/well) were cultured in a six-well plate in vitro and then exposed to UVA irradiation at 9 J/cm2 for 30 min. Following the irradiation period, HDFs were co-cultured with HAMSCs, which were seeded on transwells. A total of 72 h following the co-culturing, senescence-associated β-galactosidase staining was performed and reactive oxygen species (ROS) content and mitochondrial membrane potential (Δψm) were detected in the HDFs via flow cytometric analysis. The results demonstrated that the percentage of HDFs, detected via staining with X-gal, were markedly decreased when co-cultured with human HAMSCs, compared with the group that were not co-cultured. The ROS content was decreased and the mitochondrial membrane potential (Δψm) recovered in cells treated with UVA and HAMSCs, compared with that of cells treated with UVA alone. Reverse transcription-quantitative polymerase chain reaction revealed the significant effects of HAMSCs on the HDF senescence marker genes p53 and matrix metalloproteinase-1 mRNA expression. In addition to this, western blot analysis verified the effects of HAMSCs on UVA induced senescence, providing a foundation for novel regenerative therapeutic methods. Furthermore, the results suggested that activation of the extracellular-signal regulated kinase 1/2 mitogen activated protein kinase signal transduction pathway, is essential for the HAMSC-mediated UVA protective effects. The decrease in ROS content additionally indicated that HAMSCs may exhibit the potential to treat oxidative stress-mediated UVA skin senescence in the future. PMID:28627622

  8. Applications of phase conjugate mirror to Thomson scattering diagnostics (invited)

    International Nuclear Information System (INIS)

    Hatae, T.; Naito, O.; Nakatsuka, M.; Yoshida, H.

    2006-01-01

    A high performance phase conjugate mirror based on stimulated Brillouin scattering (SBS-PCM) has been applied to the Thomson scattering system in the JT-60U tokamak for the first time in order to improve the measurement performance. A SBS-PCM realized a high reflectivity of 95% at a high input power of 145 W (2.9 J, 50 Hz). Using the SBS-PCM, two methods have been developed to increase the intensity of scattered light. For the first method, we have developed a new optical design to provide a double-pass scattering method with the SBS-PCM. A laser beam passing through the plasma is reflected by the SBS-PCM. The reflected beam passes the plasma again along the same path by means of the phase conjugation of the optically nonlinear stimulated Brillouin scattering process. The double-pass Thomson scattering method using the SBS-PCM has demonstrated an increase of the scattered light by a factor of 1.6 compared with the single-pass scattering method in JT-60U. A multipass Thomson scattering method in which the laser beam can be confined between a couple of SBS-PCMs is also proposed. It is estimated that the multipass scattering method generates the scattered light more than several times as large as that of the single-pass scattering method. For the second method, a high-average-power yttrium aluminum garnet (Nd:YAG) laser system has been developed using the SBS-PCM. The SBS-PCM effectively compensated thermal degradation at two amplifier lines, and the average power was increased by a factor of >8 from 45 W (1.5 J, 30 Hz) to 373 W (7.46 J, 50 Hz). A Nd:YAG laser (5 J, 100 Hz) for the edge Thomson scattering in International Thermonuclear Experimental Reactor (ITER) has been designed based on the result

  9. Thermodynamic Properties, Hysteresis Behavior and Stress-Strain Analysis of MgH2 Thin Films, Studied over a Wide Temperature Range

    Directory of Open Access Journals (Sweden)

    Yevheniy Pivak

    2012-06-01

    Full Text Available Using hydrogenography, we investigate the thermodynamic parameters and hysteresis behavior in Mg thin films capped by Ta/Pd, in a temperature range from 333 K to 545 K. The enthalpy and entropy of hydride decomposition, ∆Hdes = −78.3 kJ/molH2, ∆Sdes = −136.1 J/K molH2, estimated from the Van't Hoff analysis, are in good agreement with bulk results, while the absorption thermodynamics, ∆Habs = −61.6 kJ/molH2, ∆Sabs = −110.9 J/K molH2, appear to be substantially affected by the clamping of the film to the substrate. The clamping is negligible at high temperatures, T > 523 K, while at lower temperatures, T < 393 K, it is considerable. The hysteresis at room temperature in Mg/Ta/Pd films increases by a factor of 16 as compared to MgH2 bulk. The hysteresis increases even further in Mg/Pd films, most likely due to the formation of a Mg-Pd alloy at the Mg/Pd interface. The stress–strain analysis of the Mg/Ta/Pd films at 300–333 K proves that the increase of the hysteresis occurs due to additional mechanical work during the (de-hydrogenation cycle. With a proper temperature correction, our stress–strain analysis quantitatively and qualitatively explains the hysteresis behavior in thin films, as compared to bulk, over the whole temperature range.

  10. Nd:YAG laser in caries prevention: a clinical study

    International Nuclear Information System (INIS)

    Boari, Heloisa Gomes Dimiranda

    2000-01-01

    The caries prevention by using laser irradiation has been investigated during the last 30 years. The Nd: YAG laser associated with acidulated phosphate fluoride has been shown as a very promising technique for enamel caries prevention. The aim of this work was to clinically evaluate the efficiency of Nd: YAG laser associated with acidulated phosphate fluoride in pit and fissure caries prevention of children and adolescents. In this work it was determined the dye that enhance the effect of Nd: YAG laser in enamel. It was selected 242 pre-molar and molar teeth from 33 children and adolescents, aged from 7 to 15 years old. The selected teeth were free from caries or decalcification marks (active white marks) to the clinical and radiographic exams. The teeth were divided into two groups: the first group was laser irradiated and their homologous remained as a control. The right side teeth were dye-assisted Nd:YAG laser irradiated. The dye solution was a moisture of dust coal and equal parts of water and alcohol. The irradiation conditions were 60 mJ/10 Hz, optical fiber in contact mode, with diameter of 300 μm, resulting in an energy density of 84,9 J/cm 2 . The oclusal surface of the teeth was completely irradiated, specially on the slopes and in the deepest part of the pits and fissures. This procedure was repeated three times. In the sequence it was applied the acidulated phosphate fluoride for 4 minutes. On the left side teeth - control group- only acidulated phosphate fluoride was applied for the same time. The final examination considered the presence of caries and active white marks after a period of one year. There were statistical significant differences (p < 0.01) between the lased + fluoride group and the non irradiated group. The present study concluded that the technique used in this work can be an alternative clinical method for caries prevention. (author)

  11. The Application of Non-Metallic Core Materials in a High-Temperature Reactor Experiment; Utilisation de materes non metalliques dans le coeur d'un reacteur experimental a haute temperature; Ispol'zovanie nemetallicheskikh materialov dlya aktivnoj zony vysokotemperaturnogo opytnogo reaktora; Empleo de materiales no metalicos en el nucleo de un reactor experimental de alta temperatura

    Energy Technology Data Exchange (ETDEWEB)

    Huddle, R. A.U.; Shepherd, L. R. [Organization for Economic Co-Operation and Development, Dragon Project, Atomic Energy Establishment, Winfrith, Dorset (United Kingdom)

    1963-11-15

    comportamiento de estos materiales en condiciones de funcionamiento normales. Se comunican los resultados de las investigaciones sobre irradiacion, asi como de los trabajos efectuados en los circuitos del reactor. El objetivo principal de este programa es el perfeccionamiento de los reactores de elevada temperatura refrigerados por gas para aplicarlos a la generacion de electricidad en condiciones rentables. (author) [Russian] Proekt vysokotemperaturnogo reaktora (DRAGON)sozdan dlya razrabotki tekhnologii vysokotemperaturnykh reaktorov s gazovym okhladitelem; v nem predusmatrivalos' sooruzhenie i ehkspluatatsiya opytnogo reaktora na 20 mgvt (tepl.). Reaktor, sooruzhenie kotorogo budet vskore zakoncheno, predstavlyaet soboj sistemu, okhlazhdaemuyu geliem; temperatura na vykhode iz aktivnoj zony budet dostigat' 750{sup o}C. V nem budet ispol'zovat'sya U-235 v kachestve goryuchego i torij v kachestve vosproizvodyashchego materiala. Kharakternoj osobennost'yu sistemy yavlyaetsya otsutstvie kakogo-libo metalla v aktivnoj zone. Vvidu togo, chto v reaktore dolzhny razvivat'sya ves'ma vysokie temperatury,' a imenno, 1050{sup o}C na poverkhnosti teplovydelyayushchego ehlementa i do 1500{sup o}C v naibolee sil'no nagrevaemykh tochkakh topliva, dlya ego sooruzheniya ispol'zovany ogneupornye nemetallicheskie materialy. Vse veshchestvo aktivnoj zony sosredotocheno v teplovydelyayushchem ehlemente, blagodarya chemu sootnoshenie mezhdu poverkhnost'yu teploperedachi i ob{sup e}mom aktivnoj zony dostigaet bol'shogo znacheniya, i, sledovatel'no, pozvolyaet dostigat' vysokoj srednej plotnosti ehnergii v sravnitel'no kompaktnoj sisteme. Kazhdyj teplovydelyayushchij ehlement sostoit ieh gruppy grafitovykh trubok, zapolnennykh grafitovymi tabletkami, soderzhashchimi rasshcheplyayushcheesya i vosproizvodyashchee veshchestva v vide karbidov. Gelievyj okhladitel' prokhodit po osi. kazhdogo teplovydelyayushchego sterzhnya i vyvoditsya u ego osnovaniya, okhladitel' zatem napravlyaetsya v ochistitel

  12. Ultrasonic Inspection following Heat Treatment of Uranium Alloys; Controle des Traitements Thermiques d'Alliage d'Uranium par Ultrasons; Kontrol' termicheskoj obrabotki uranovykh splavov s pomoshch'yu ul'trazvuka; Control Ultrasonico de los Tratamientos Termicos de Aleaciones de Uranio

    Energy Technology Data Exchange (ETDEWEB)

    Destribats, Marie-Therese; Cherpentier, C.; Papezik, F.; Pigeon, M. [Centre d' Etudes Nucleaires Desaclay (France)

    1965-10-15

    'zujutsja slegka legirovannye splavy urana, chasto voznikaet neobhodimost' izmel'chat' zerna termicheskoj obrabotkoj. Pri jetom okazalos' neobhodimym osushhestvljat' kontrol' za vsemi jelementami i za vsem proizvodstvom, chtoby tochno znat' kachestvo ispol'zovannogo topliva. Jetot kontrol' nevozmozhno osushhestvljat' cherez mikrografiju, tak kak on zanimaet mnogo vremeni i ne daet polnyh rezul'tatov. Kontrol prinjatyj v jadernom centre, osnovan na principe pogloshhenija ul'trazvukov materialami. Dannoe pogloshhenie svjazano so strukturoj sredy. Esli znachenie Xmalo po sravneniju s velichinoj zerna {lambda}, to pogloshhenie slaboe, a esli G sostavljaet porjadka {lambda}/2, to pogloshhenie ochen' sil'noe. Vse pervye opyty provodili v vozduhe na osnove analiza mnogokratnyh jeho i zatem izmerjali vysoty pervogo jeha. Dalee izmerenie provodili v vode. Pri jetom sravnivali vysoty propushhennogo i pervonachal'nogo jeha. Pri promyshlennom kontrole sravnivaetsja amplituda jeha, propushhennogo cherez material, s jehom, poluchennym na horosho obrabotannom jetalone togo zhe tipa i toj zhe geometricheskoj formy. Ispytanie provodili v special'noj ustanovke, kogda materialy zapuskali v rotaciju s pomoshh'ju rolikov, a napravljaemye preobrazovateli peremeshhali vdol' jelementa. Vintovoe skennirovanie osushhestvljali pri shage menee 5 mm. V ul'trazvukovom generatore imeetsja sistema regulirovanija,kotoraja podderzhivaet kontrol'noe jeho. Privoditsja serija zapisej po razlichnym splavam, i v chastnosti govoritsja o defektah, nabljudaemyh u jelementov, kotorye byli obrabotany indukciej vo vremja prohozhdenija. Obnaruzhivajutsja ploho obrabotannye uchastki razmerom menee 1 sm{sup 2} . V nastojashhee vremja podobnym obrazom osushhestvljaetsja kontrol' za vsemi tipami topliva v vide slegka legirovannyh uranovyh splavov, primenjaemyh v reaktorah G2 EL3,EF1 EdF2 i INCA, inymi slovami, kontrolirujutsja vse sterzhni i trubki s diametrom mezhdu 20 i 95 mm. (author)

  13. Economic Aspects of Air and Gas Cleaning for Nuclear Energy Processes; Aspects Economiques de l'Epuration de l'Air et des Gaz au Cours des Operations Nucleaires; 042d 041a 041e 041d 041e 0414 0; Aspectos Economicos de la Depuracion del Aire y de los Gases en los Procesos de Obtencion de Energia Nuclear

    Energy Technology Data Exchange (ETDEWEB)

    Silverman, Leslie [Harvard School of Public Health, Boston, MA (United States)

    1960-07-01

    los que ciertos materiales nucleares no radiactivos dan origen a efluentes toxicos o nocivos que deben tambien ser evacuados sin incurrir en gastos excesivos. El autor describe con cierto detalle los factores que influyen en el precio de costo y en los gastos de funcionamiento de los equipos de depuracion de gases, asi como los diferentes sistemas utilizados en los Estados Unidos. Naturalmente, los problemas que plantean los efluentes gaseosos han sido abordados y resueltos mediante varios tipos de dispositivos, pero el rendimiento de estos ha podido medirse en terminos comparables. Por lo tanto, resulta posible evaluar los aspectos economicos relacionados con el consumo de energia, coste de los materiales adsorbentes, necesidades de espacio, problemas de corrosion y otras caracteristicas de funcionamiento de los aparatos. En virtud de un contrato concertado con el Laboratorio de Depuracion del Aire de la Universidad de Harvard, la Comision de Energia Atomica de los Estados Unidos ha iniciado un programa de evaluacion en cuya ejecucion cooperan diversos laboratorios y contratistas de la Comision. En la memoria se enumeran los factores basicos que se han de tener en cuenta para definir y analizar los costos y se presentan algunos resultados preliminares. Asimismo, se describen otros estudios de caracter economico llevados a cabo en los Estados Unidos sobre el empleo de determinados procesos o instalaciones. (author) [Russian] V nastojashhem doklade privodjatsja osnovnye trebovanija po kontrolju za gazovymi i zhidkimi obrazovanijami; jeti trebovanija kasajutsja problem proizvodstva ishodnyh produktov, razdelenija izotopov, proizvodstva toplivnyh jelementov, regeneracii gorjuchego i jekspluatacii reaktorov. Imejutsja takzhe sluchai, kogda neradioaktivnye jadernye materialy, obladajushhie toksichnost'ju ili neznachitel'nym zhidkostnym obrazovaniem (k nim, naprimer, otnosjatsja proizvodstvo berillija i cirkonija), predstavljajut interes, i na nih takzhe dolzhen

  14. Hanford High-Level Waste Management; Gestion des Dechets de Haute Activite a Hanford; 041e 0411 0420 0410 0411 041e 0422 041a 0410 0412 042b 0421 041e 041a 041e 0420 0410 0414 0418 041e 0410 041a 0422 0418 0412 041d 042b 0425 041e 0422 0425 041e 0414 041e 0412 0412 0425 042d 041d 0424 041e 0420 0414 0415 ; Tratamiento y Evacuacion de Desechos de Elevada Radiactividad en Hanford

    Energy Technology Data Exchange (ETDEWEB)

    Tomlinson, R. E. [Hanford Laboratories, General Electric Co., Richland, WA (United States)

    1963-02-15

    bol'shej uverennosti v nadezhnosti ih dlitel'nogo hranenija. Bol'shie ob'my prakticheski ne nagrevahhcihsja othodov poduchennyh v rezul'tate snjatija obolochek s teplovydeljajushhih jelementov, budut uparivat'sja v sushhestvujushhih podzemnyh bakah do poluchenija solenyh briketov. Laboratornye issledovanija i probnaja operacija v bake emkost'ju v 18 900 l pokazyvajut, chto putem -propuskanija nagretogo vozduha cherez rastvor mozhno udalit' dostatochnoe kolichestvo vody i chto reguliruemoe nasyshhenie ugol'noj kislotoj dlja prevrashhenija svobodnogo edkogo natrija v karbonat daet vozmozhnost' poluchat' negigroskopichnye soljanye brikety. Samoproizvol'no nagrevajushhiesja othody budut frakcionizirovat'sja dlja togo, chtoby dolgozhivushhie izluchateli tepla mozhje bylo hranit' razdel'no v prochnyh kontejnerah malogo ob{sup e}ma. V sluchae neobhodimosti jeti materialy mogut byt' ispol'zovany dlja razlichnyh celej. Cherez 5 idi 10 det posle raspada korotko-- zhivushhih izluchatelej tepla, ostavshiesja oodjanye othody budut smeshivat'sja s othodami, poluchaemymi v rezul'tate udalenija obolochek, uparivat'sja i briketirovat'sja. Dlja provedenija neobhodimyh rabot po himicheskoj pererabotke v nastojashhee vremja vosstanavlivaetsja i rekonstruiruetsja staroe zdanie s kan'onami. Dlja vydelenija stroncija i cerija iz kislyh othodov, verojatno, budet ispol'zovan metod jekstrakcii rastvoritelem (D2EHPA). Dlja vydelenija cezija eshhe ne sdelano okonchatel'nogo vybora mezhdu jekstrakciej, ionnym obmenom i metodom osazhdenija. Predpolagaetsja, chto processy vydelenija otdel'nyh izotopov budut vneseny primerno v 1966 godu. (author)

  15. Wear studies in the shearing process by means of irradiated tools; Etudes d'usure dans les operations de cisaillement, au moyen d'outils irradies; Issledovaniya problemy iznosa v protsesse skalyvaniya posredstvom obluchennykh instrumentov; Estudios de desgaste en las operaciones de cizallamiento, realizados con ayuda de herramientas irradiadas

    Energy Technology Data Exchange (ETDEWEB)

    Sata, Toshio; Abe, Kunio; Nakajima, Kiyoshi [Institute of Physical and Chemical Research, Komagome, Bunkyo-Ku, Tokyo (Japan)

    1962-01-15

    shtampovki primerno 400-500 detalej. 2) Probojnik iznashivaetsya v bol'shej stepeni, primerno na 20% bol'she, chem puanson. 3) Smazochnye materialy s prisadkoj na predel'noe davlenie, takoj, kak khlor, fosfor ili sera, snizhayut iznos instrumenta, v to vremya kak ochishchennye mineral'nye masla dayut neznachitel'nyj ehffekt. 4) Naibol'shij iznos instrumenta obnaruzhen pri shtampovke bolee tverdykh metallicheskikh listov. Iznos instrumenta pri shtampovke nerzhaveyushchej stali vtroe, a pri shtampovke kremnievoj stali primerno v shest' raz prevyshaet iznos pri shtampovke stali s nizkim soderzhaniem ugleroda. (author)

  16. Tourism is a Spatial Phenomenon Il turismo è un fenomeno spaziale

    Directory of Open Access Journals (Sweden)

    Pasquale Boccagna

    2010-11-01

    che attiva un processo di spesa di parte del suo reddito in un luogo diverso dalla sua abituale dimora. La scelta della destinazione in cui fruire dei servizi turistici e svolgere le attività collaterali di consumo è il frutto di un processo decisionale complesso basato sulla selezione competitiva tra soluzioni alternative che siano in grado di rispondere ad un insieme di bisogni ed aspirazioni a parità di costi e di livello di servizi richiesti. Successivamente viene preso in esame il modo con cui una località geografica diviene destinazione turistica e come le caratteristiche strutturali (servizi di alloggio, ristorazione, accessori ed infrastrutturali (accessibilità geografica, sociale ed economica possano essere in grado di esprimere un richiamo "emozionale" per il turista; l’incontro tra domanda ed offerta viene visto in un’ottica postfordista secondo il framework “Mutual Value” che assegna un ruolo fondamentale alla componente dei servizi presente nell’offerta di vendita dei beni (materiali ed immateriali per generare un vantaggio competitivo sul mercato. In prosieguo il fenomeno turistico viene messo in relazione al concetto di mobilità territoriale per evidenziare l’impatto che esso genera sul piano ambientale ed urbanistico e la necessità di monitorare il fenomeno e pianificare le azioni di adeguamento strutturale ed infrastrutturale del territorio nella direzione della sostenibilità. Infine verranno esposti dei casi di mobilità urbana ed extraurbana di tipo turistico secondo una prospettiva che vede il trasporto urbano ed extraurbano una vera e propria risorsa (VRIO generatrice di vantaggio competitivo per il sistema locale.

  17. Dispersions of Oxides in Oxide Matrices as High-Temperature Reactor Fuels; Dispersions d'oxyde dans des matrices d'oxyde, utilisees comme combustibles dans des reacteurs a haute temperature; Dispersiya okisej v okislovykh matritsakh v kachestve topliva dlya vysokotemperaturnogo reaktora; Empleo de dispersiones de oxidos en matrices de oxidos, como combustibles para reactores de elevada temperatura

    Energy Technology Data Exchange (ETDEWEB)

    Williams, J. [Atomic Energy Research Establishment, Harwell (United Kingdom)

    1963-11-15

    incorporarlas en matrices de elevada densidad. Los trabajos sobre metodos de elaboracion en escala experimental se hallan bastante avanzados. (author) [Russian] Daetsya obzor vozmozhnosti primeneniya dispersij PuO{sub 2},UO{sub 2}, ThO{sub 2} v matritsakh iz BeO, Al{sub 2}O{sub 3}, MgO i SiO{sub 2} s tochki zreniya sokhraneniya tselostnosti takogo topliva i sposobov ego izgotovleniya. Neizmennost' razmerov i sposobnost' uderzhaniya produktov deleniya yavlyayutsya naibolee vazhnymi svojstvami s tochki zreniya sokhraneniya tselostnosti topliva. Sovmestimost' sostavnykh ehlementov topliva drug s drugom i s teplonositelem okazyvayut vliyanie na neizmennost' razmerov, no v ehtom otnoshenii okislovye vidy topliva obladayut znachitel'nymi preimushchestvami. Na izmenenie razmerov pod dejstviem oblucheniya okazyvayut vliyanie: povrezhdeniya matritsy pod dejstviem nejtronov i oskolkov deleniya; radiatsionnoe povrezhdenie fazy delyashchikhsya veshchestv vosproizvodyashchikh materialov i nakoplenie produktov deleniya v gazoobraznom sostoyanii. Termicheskie napryazheniya takzhe mogut vyzyvat' izmeneniya formy. Odnako svedeniya o mekhanizme relaksatsii napryazhenij slishkom ogranicheny, chtoby mozhno bylo dat' kakuyu-libo priemlimuyu teoreticheskuyu otsenku povedeniyu topliva. Issledovaniya vykhoda produktov deleniya kak v sluchae legkogo oblucheniya, tak i pri sil'nom vygoranii okisej delyashchikhsya veshchestv/vosproizvodyashchikh materialov ogranichivalis' glavnym obrazom gazoobraznymi produktami deleniya, preimushchestvenno ksenonom. Dannye o vykhode drugikh produktov deleniya, a takzhe svedeniya o prokhozhdenii produktov deleniya voobshche cherez vozmozhnye materialy dlya matrits ochen' ogranicheny. Issledovaniya pronitsaemosti chistykh spekshikhsya okisej pokazyvayut, chto dlya ustraneniya otkrytoj poristosti takikh matrits potrebovalos' by dostizhenie plotnostej, dokhodyashchikh po men'shej mere do 95, a to i do 98% ot teoreticheski osushchestvimoj. Dlya izgotovleniya chastits

  18. PVDF-based copolymers, terpolymers and their multi-component material systems for capacitor applications

    Science.gov (United States)

    Chu, Baojin

    ferroelectrics. P(VDF-TrFE-CFE) terpolymers possess a high dielectric constant (larger than 50 at 1 kHz) at room temperature and excellent electromechanical properties. Here, the P(VDF-TrFE-CFE) terpolymers were studied as dielectric materials for capacitor applications. The electrical, thermal and microstructure characterizations were performed on the terpolymers. The terpolymers exhibit a high breakdown field (higher than 400 MV/m) and energy density (larger than 9 J/cm 3). The energy discharge characteristics of the terpolymer were studied by directly discharging the stored energy in the terpolymers to a load resistor. Due to the highly field-dependent nonlinear and frequency dependent dielectric response of the terpolymers, the discharge energy density and equivalent series resistance strongly depend on the load resistor and discharge speed. This study found that for high energy density dielectric materials, a very high dielectric constant might not be an advantage. In the case of terpolymers, this leads to early polarization saturation, i.e., polarization response saturates under an electric field much lower than the breakdown field and causes lower than expected energy density. Due to the dielectric nonlinearity and early saturation of polarization, the energy density of the terpolymers increases linearly with the applied electric fields. It was also found that the polymer-metal interface played an important role for conduction and the breakdown field in the terpolymers, which was related to the charge injection from the metal to the polymer. Due to highly nonlinear dielectric behavior and early polarization saturation in the terpolymers, it was proposed that a high dielectric constant might not be desirable to obtain high energy density. Poly(vinylidene fluoride-chlorotrifluoroethylene) (P(VDFCTFE), 10, 15 and 20 wt% CTFE) and Poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP), 10 and 12 wt% HFP) copolymers, which possess a much lower dielectric constant (about 12

  19. Antimicrobial photodynamic therapy combined with periodontal treatment for metabolic control in patients with type 2 diabetes mellitus: study protocol for a randomized controlled trial.

    Science.gov (United States)

    Evangelista, Erika Elisabeth; França, Cristiane Miranda; Veni, Priscila; de Oliveira Silva, Tamires; Gonçalves, Rafael Moredo; de Carvalho, Verônica Franco; Deana, Alessandro Melo; Fernandes, Kristianne P S; Mesquita-Ferrari, Raquel A; Camacho, Cleber P; Bussadori, Sandra Kalil; Alvarenga, Letícia Heineck; Prates, Renato Araujo

    2015-05-27

    The relationship between diabetes mellitus (DM) and periodontal disease is bidirectional. DM is a predisposing and modifying factor of periodontitis, which, in turn, worsens glycemic control and increases proteins found in the acute phase of inflammation, such as C-reactive protein. The gold standard for the treatment of periodontal disease is oral hygiene orientation, scaling and planing. Moreover, systemic antibiotic therapy may be employed in some cases. In an effort to minimize the prescription of antibiotics, photodynamic therapy (PDT) has been studied as an antimicrobial technique and has demonstrated promising results. The aim of the proposed study is to determine whether PDT as a complement to periodontal therapy (PT) is helpful in the metabolic control of individuals with type 2 diabetes and the reduction of acute-phase inflammatory markers. The patients will be randomized using a proper software program into two groups: 1) PT + placebo PDT or 2) PT + active PDT. All patients will first be examined by a specialist, followed by PT performed by two other healthcare professionals. At the end of each session, PDT (active or placebo) will be administered by a fourth healthcare professional. The following will be the PDT parameters: diode laser (660 nm); power output = 110 mW; exposure time = 90 s per point (9 J/point); and energy density = 22 J/cm(2). The photosensitizer will be methylene blue (50 μg/mL). The patients will be re-evaluated 15, 30, 90 and 180 days after treatment. Serological examinations with complete blood count, fasting glucose, glycated hemoglobin and salivary examinations to screen for tumor necrosis factor alpha, interleukin 1, interleukin 6, ostelocalcin, and osteoprotegerin/RANKL will be performed at each evaluation. The data will be statistically evaluated using the most appropriate tests. The results of this study will determine the efficacy of photodynamic therapy as an adjuvant to periodontal treatment in diabetic patients. The

  20. Laser polishing of 3D printed mesoscale components

    International Nuclear Information System (INIS)

    Bhaduri, Debajyoti; Penchev, Pavel; Batal, Afif; Dimov, Stefan; Soo, Sein Leung; Sten, Stella; Harrysson, Urban; Zhang, Zhenxue; Dong, Hanshan

    2017-01-01

    Highlights: • Process optimisation for laser polishing novel 3D printed SS316L parts. • Evaluating the effects of key polishing parameters on SS316L surface roughness. • Detailed spectroscopic analysis of oxide layer formation due to laser polishing. • Comparative surface integrity analysis of SS parts polished in air and argon. • A maximum reduction in roughness of over 94% achieved at optimised polishing settings. - Abstract: Laser polishing of various engineered materials such as glass, silica, steel, nickel and titanium alloys, has attracted considerable interest in the last 20 years due to its superior flexibility, operating speed and capability for localised surface treatment compared to conventional mechanical based methods. The paper initially reports results from process optimisation experiments aimed at investigating the influence of laser fluence and pulse overlap parameters on resulting workpiece surface roughness following laser polishing of planar 3D printed stainless steel (SS316L) specimens. A maximum reduction in roughness of over 94% (from ∼3.8 to ∼0.2 μm S_a) was achieved at the optimised settings (fluence of 9 J/cm"2 and overlap factors of 95% and 88–91% along beam scanning and step-over directions respectively). Subsequent analysis using both X-ray photoelectron spectroscopy (XPS) and glow discharge optical emission spectroscopy (GDOES) confirmed the presence of surface oxide layers (predominantly consisting of Fe and Cr phases) up to a depth of ∼0.5 μm when laser polishing was performed under normal atmospheric conditions. Conversely, formation of oxide layers was negligible when operating in an inert argon gas environment. The microhardness of the polished specimens was primarily influenced by the input thermal energy, with greater sub-surface hardness (up to ∼60%) recorded in the samples processed with higher energy density. Additionally, all of the polished surfaces were free of the scratch marks, pits, holes, lumps

  1. Effects of 2.0 Gy of 60Co gamma rays irradiation on rat embryos

    International Nuclear Information System (INIS)

    Lee, Juing-Yi; Satow, Yukio

    1987-01-01

    Pregnant rats of Donryu strain were exposed to a whole-body 60 Co γ ray irradiation of a single dose of 2.0 Gy (Dose rate: 0.5 Gy/min) on day 7, 8, 9, 10 or 11 of gestation (sperm day = day 0). The rats were sacrificed on day 18 and the offspring were examined for external and visceral malformations. Malformed embryos occurred between days 7 and 11 with the highest incidence occurring on day 9. Dose with 2.0 Gy increased the rate of resorption or death (52.1 %), in the survivors, caused congenital malformation in a majority of embryos (86.5 %) on day 8 of gestation. There is an increase in malformation (93.3 %) and growth retardation, but no increase in mortality (42.9 %) on day 9 of gestation. Relatively few anomalies resulted from irradiation on day 7 of gestation. The peak day for cardiovascular anomalies occurred on day 9 (88.3 % of all survival embryos) with high levels also occurring on day 8 (86.5 %). Cardiovascular anomalies consisted of VSD, hypoplasia of the pulmonary trunk, coarctation of the aorta, double aortic arch, right aortic arch, riding aorta, complete transposition of the aorta, persistent atrioventricular canal, vascular ring, aberrant right subclavian artery and others. Similar anomalies, but at a lower incidence, were produced by 60 Co γ ray at dose levels of 2.0 Gy on day 10 or 11 of gestation. Cases of cleft lip and cleft palate or facial cleft were observed seventeen fetuses on day 9 of gestation (31 %). Exencephaly occurred in nine embryos treated on day 9 (16.1 %) and in one embryos treated on day 10. Tail defects appeared with treatment on day 9 with the latter predominating on day 11. The present study show that maximum resorption (52.1 %) was seen with treatment on day 8 whereas the highest rate of malformation (93.3 %) was observed with treatment on day 9. (J.P.N.)

  2. Evaluation of pulsed light treatments on inactivation of Salmonella on blueberries and its impact on shelf-life and quality attributes.

    Science.gov (United States)

    Cao, Xinang; Huang, Runze; Chen, Haiqiang

    2017-11-02

    Blueberry have a short shelf life when fully ripe and susceptible to contamination of various pathogens. Our study investigated the effect of pulsed light (PL) on inactivation of Salmonella on blueberries and its impact on shelf-life, quality attributes and health-benefit compounds of blueberries. Dry PL (6J/cm 2 ) and water-assisted PL (samples were agitated in water during PL treatment; 9J/cm 2 ) along with two controls, dry control (untreated) and water-assisted control (water washing without PL), were applied to blueberries with subsequent storages at room temperature (3days) or 5°C (7days). For Salmonella inactivation, dry PL treatment achieved 0.9 and 0.6 log reduction of Salmonella for spot and dip inoculation, respectively; while the water-assisted PL treatment reduced Salmonella by 4.4 log and 0.8 log for spot and dip inoculation, respectively. The water-assisted PL treatment resulted in Salmonella populations significantly lower than the dry control after storage regardless of the storage temperature and inoculation method. Neither dry nor water-assisted PL treatments improved the shelf life of blueberries even though direct inactivation of natural yeasts and molds were achieved. Surface lightness was instantly reduced after both dry and water-assisted PL treatments. Compared with the dry control, the two PL treatments did not reduce the firmness of blueberries. Weight loss was increased for the dry PL treated samples, but not for the water-assisted PL treatment for both storage conditions. Delayed anthocyanins accumulation and reduced total antioxidant activity were induced by both PL treatments at the end of storage at room temperature, while slight enhancement in total phenolics content was achieved by water-assisted PL treatment. In conclusion, the water-assisted PL treatment could effectively decontaminate Salmonella on blueberries while showed minimal or no impact on the shelf-life, quality attributes and health-benefit compounds of blueberries. PL

  3. Effects of 2. 0 Gy of /sup 60/Co gamma rays irradiation on rat embryos

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Juing-Yi; Satow, Yukio

    1987-01-01

    Pregnant rats of Donryu strain were exposed to a whole-body /sup 60/Co ..gamma.. ray irradiation of a single dose of 2.0 Gy (Dose rate: 0.5 Gy/min) on day 7, 8, 9, 10 or 11 of gestation (sperm day = day 0). The rats were sacrificed on day 18 and the offspring were examined for external and visceral malformations. Malformed embryos occurred between days 7 and 11 with the highest incidence occurring on day 9. Dose with 2.0 Gy increased the rate of resorption or death (52.1 %), in the survivors, caused congenital malformation in a majority of embryos (86.5 %) on day 8 of gestation. There is an increase in malformation (93.3 %) and growth retardation, but no increase in mortality (42.9 %) on day 9 of gestation. Relatively few anomalies resulted from irradiation on day 7 of gestation. The peak day for cardiovascular anomalies occurred on day 9 (88.3 % of all survival embryos) with high levels also occurring on day 8 (86.5 %). Cardiovascular anomalies consisted of VSD, hypoplasia of the pulmonary trunk, coarctation of the aorta, double aortic arch, right aortic arch, riding aorta, complete transposition of the aorta, persistent atrioventricular canal, vascular ring, aberrant right subclavian artery and others. Similar anomalies, but at a lower incidence, were produced by /sup 60/Co ..gamma.. ray at dose levels of 2.0 Gy on day 10 or 11 of gestation. Cases of cleft lip and cleft palate or facial cleft were observed seventeen fetuses on day 9 of gestation (31 %). Exencephaly occurred in nine embryos treated on day 9 (16.1 %) and in one embryos treated on day 10. Tail defects appeared with treatment on day 9 with the latter predominating on day 11. The present study show that maximum resorption (52.1 %) was seen with treatment on day 8 whereas the highest rate of malformation (93.3 %) was observed with treatment on day 9. (J.P.N.).

  4. Laser polishing of 3D printed mesoscale components

    Energy Technology Data Exchange (ETDEWEB)

    Bhaduri, Debajyoti, E-mail: debajyoti.bhaduri@gmail.com [Department of Mechanical Engineering, School of Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT (United Kingdom); Penchev, Pavel; Batal, Afif; Dimov, Stefan; Soo, Sein Leung [Department of Mechanical Engineering, School of Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT (United Kingdom); Sten, Stella; Harrysson, Urban [Digital Metal, Höganäs AB, 263 83 Höganäs (Sweden); Zhang, Zhenxue; Dong, Hanshan [School of Metallurgy and Materials, University of Birmingham, Edgbaston, Birmingham, B15 2TT (United Kingdom)

    2017-05-31

    Highlights: • Process optimisation for laser polishing novel 3D printed SS316L parts. • Evaluating the effects of key polishing parameters on SS316L surface roughness. • Detailed spectroscopic analysis of oxide layer formation due to laser polishing. • Comparative surface integrity analysis of SS parts polished in air and argon. • A maximum reduction in roughness of over 94% achieved at optimised polishing settings. - Abstract: Laser polishing of various engineered materials such as glass, silica, steel, nickel and titanium alloys, has attracted considerable interest in the last 20 years due to its superior flexibility, operating speed and capability for localised surface treatment compared to conventional mechanical based methods. The paper initially reports results from process optimisation experiments aimed at investigating the influence of laser fluence and pulse overlap parameters on resulting workpiece surface roughness following laser polishing of planar 3D printed stainless steel (SS316L) specimens. A maximum reduction in roughness of over 94% (from ∼3.8 to ∼0.2 μm S{sub a}) was achieved at the optimised settings (fluence of 9 J/cm{sup 2} and overlap factors of 95% and 88–91% along beam scanning and step-over directions respectively). Subsequent analysis using both X-ray photoelectron spectroscopy (XPS) and glow discharge optical emission spectroscopy (GDOES) confirmed the presence of surface oxide layers (predominantly consisting of Fe and Cr phases) up to a depth of ∼0.5 μm when laser polishing was performed under normal atmospheric conditions. Conversely, formation of oxide layers was negligible when operating in an inert argon gas environment. The microhardness of the polished specimens was primarily influenced by the input thermal energy, with greater sub-surface hardness (up to ∼60%) recorded in the samples processed with higher energy density. Additionally, all of the polished surfaces were free of the scratch marks, pits, holes

  5. Performance evaluation of non-thermal plasma injection for elemental mercury oxidation in a simulated flue gas

    Energy Technology Data Exchange (ETDEWEB)

    An, Jiutao; Shang, Kefeng; Lu, Na [Institute of Electrostatics and Special Power, Dalian University of Technology, Dalian 116024 (China); Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People' s Republic of China, Dalian 116024 (China); Jiang, Yuze [Shandong Electric Power Research Institute, Jinan 250002 (China); Wang, Tiecheng [Institute of Electrostatics and Special Power, Dalian University of Technology, Dalian 116024 (China); Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People' s Republic of China, Dalian 116024 (China); Li, Jie, E-mail: lijie@dlut.edu.cn [Institute of Electrostatics and Special Power, Dalian University of Technology, Dalian 116024 (China); Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People' s Republic of China, Dalian 116024 (China); Wu, Yan [Institute of Electrostatics and Special Power, Dalian University of Technology, Dalian 116024 (China); Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education of the People' s Republic of China, Dalian 116024 (China)

    2014-03-01

    Graphical abstract: - Highlights: • The use of non-thermal plasma injection approach to oxidize Hg{sup 0} in simulated flue gas at 110 °C was studied. • A high Hg{sup 0} oxidation efficiency was observed in the mixed flue gas that included O{sub 2}, H{sub 2}O, SO{sub 2}, NO and HCl. • Chemical and physical processes (e.g., ozone, N{sub 2} metastable states and UV-light) contributed to Hg{sup 0} oxidation. • Mercury species mainly existed in the form of HgO(s) adhering to the suspended aerosols in the gas-phase. - Abstract: The use of non-thermal plasma (NTP) injection approach to oxidize elemental mercury (Hg{sup 0}) in simulated flue gas at 110 °C was studied, where a surface discharge plasma reactor (SDPR) inserted in the simulated flue duct was used to generate and inject active species into the flue gas. Approximately 81% of the Hg{sup 0} was oxidized and 20.5 μg kJ{sup −1} of energy yield was obtained at a rate of 3.9 J L{sup −1}. A maximal Hg{sup 0} oxidation efficiency was found with a change in the NTP injection air flow rate. A high Hg{sup 0} oxidation efficiency was observed in the mixed flue gas that included O{sub 2}, H{sub 2}O, SO{sub 2}, NO and HCl. Chemical and physical processes (e.g., ozone, N{sub 2} metastable states and UV-light) were found to contribute to Hg{sup 0} oxidation, with ozone playing a dominant role. The deposited mercury species on the internal surface of the flue duct was analyzed using X-ray photoelectron spectroscopy (XPS) and electronic probe microanalysis (EPMA), and the deposit was identified as HgO. The mercury species is thought to primarily exist in the form of HgO(s) by adhering to the suspended aerosols in the gas-phase.

  6. z ~ 7 Galaxy Candidates from NICMOS Observations Over the HDF-South and the CDF-South and HDF-North Goods Fields

    Science.gov (United States)

    Bouwens, Rychard J.; Illingworth, Garth D.; González, Valentino; Labbé, Ivo; Franx, Marijn; Conselice, Christopher J.; Blakeslee, John; van Dokkum, Pieter; Holden, Brad; Magee, Dan; Marchesini, Danilo; Zheng, Wei

    2010-12-01

    We use ~88 arcmin2 of deep (gsim26.5 mag at 5σ) NICMOS data over the two GOODS fields and the HDF-South to conduct a search for bright z >~ 7 galaxy candidates. This search takes advantage of an efficient preselection over 58 arcmin2 of NICMOS H 160-band data where only plausible z >~ 7 candidates are followed up with NICMOS J 110-band observations. ~248 arcmin2 of deep ground-based near-infrared data (gsim25.5 mag, 5σ) are also considered in the search. In total, we report 15 z 850-dropout candidates over this area—7 of which are new to these search fields. Two possible z ~ 9 J 110-dropout candidates are also found, but seem unlikely to correspond to z ~ 9 galaxies (given the estimated contamination levels). The present z ~ 9 search is used to set upper limits on the prevalence of such sources. Rigorous testing is undertaken to establish the level of contamination of our selections by photometric scatter, low-mass stars, supernovae, and spurious sources. The estimated contamination rate of our z ~ 7 selection is ~24%. Through careful simulations, the effective volume available to our z >~ 7 selections is estimated and used to establish constraints on the volume density of luminous (L* z = 3, or ~-21 mag) galaxies from these searches. We find that the volume density of luminous star-forming galaxies at z ~ 7 is 13+8 -5 times lower than at z ~ 4 and >25 times lower (1σ) at z ~ 9 than at z ~ 4. This is the most stringent constraint yet available on the volume density of gsimL* z = 3 galaxies at z ~ 9. The present wide-area, multi-field search limits cosmic variance to lsim20%. The evolution we find at the bright end of the UV LF is similar to that found from recent Subaru Suprime-Cam, HAWK-I or ERS WFC3/IR searches. The present paper also includes a complete summary of our final z ~ 7 z 850-dropout sample (18 candidates) identified from all NICMOS observations to date (over the two GOODS fields, the HUDF, galaxy clusters). Based on observations made with the

  7. z ~ 7-10 Galaxies Behind Lensing Clusters: Contrast with Field Search Results

    Science.gov (United States)

    Bouwens, Rychard J.; Illingworth, Garth D.; Bradley, Larry D.; Ford, Holland; Franx, Marijn; Zheng, Wei; Broadhurst, Tom; Coe, Dan; Jee, M. James

    2009-01-01

    We conduct a search for z gsim 7 dropout galaxies behind 11 massive lensing clusters using 21 arcmin2 of deep Hubble Space Telescope NICMOS, ACS, and WFPC2 image data. In total, over this entire area, we find only one robust z ~ 7 z-dropout candidate (previously reported around Abell 1689). Four less robust z-dropout and J-dropout candidates are also found. The nature of the four weaker candidates could not be precisely determined due to the limited depth of the available optical data, but detailed simulations suggest that all four are likely to be low-redshift interlopers. By contrast, we estimate that our robust candidate A1689-zD1 has dropouts and 0.3 z ~ 9 J-dropouts over our cluster search area, in reasonable agreement with our observational results, given the small numbers. The number of z gsim 7 candidates we find in the present search is much lower than that which has been reported in several previous studies of the prevalence of z gsim 7 galaxies behind lensing clusters. To understand these differences, we examined z gsim 7 candidates in other studies and conclude that only a small fraction are likely to be z gsim 7 galaxies. Our findings support models that show that gravitational lensing from clusters is of the most value for detecting galaxies at magnitudes brighter than L* (H lsim 27) where the LF is expected to be very steep. Use of these clusters to constrain the faint-end slope or determine the full LF is likely of less value due to the shallower effective slope measured for the LF at fainter magnitudes, as well as significant uncertainties introduced from modeling both the gravitational lensing and incompleteness. Based on observations made with the NASA/ESA Hubble Space Telescope, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. These observations are associated with programs #5352, 5935, 6488, 8249, 8882, 9289, 9452, 9717, 10150, 10154, 10200, 10325, 10504, 10863, 10996.

  8. Synthesis, linear and nonlinear optical properties of phosphonato-substituted bithiophenes derived from 2,2'-biphenol.

    Science.gov (United States)

    Freeman, Jason L; Zhao, Qun; Zhang, Yuanli; Wang, Jianwei; Lawson, Christopher M; Gray, Gary M

    2013-10-21

    Two new series of phosphonato-substituted bithiophenes, BpP(X)(C4H2S)2H and BpP(X)(C4H2S)2P(X)Bp (Bp = 2,2'-C12H8O2, X = O, S, Se), have been synthesized and characterized using linear absorption and emission spectra, and third-order nonlinear absorption measurements at 430 nm with 27 ps laser pulses. The compounds were synthesized in three steps: (1) reacting lithiated bithiophene with (Et2N)2PCl; (2) reacting the product from the first step with biphenol; and (3) reacting the product from the second step with the appropriate chalcogen. The X-ray crystal structures of two of the compounds, BpP(O)(C4H2S)2P(O)Bp and BpP(Se)(C4H2S)2P(Se)Bp, are reported and show a number of intermolecular π-π interactions. The linear absorption spectra, emission spectra, and emission quantum yields show distinct trends with respect to the chalcogen and the number of phosphorus substituents attached to the 2,2'-bithiophene ring. The compounds show emission maxima at wavelengths ranging from 380-400 nm and, BpP(S)(C4H2S)2H shows a 23-fold increase in fluorescence quantum yield relative to that of 2,2'-bithiophene. Fluorescence lifetimes and radiative and non-radiative decay rate constants for the first singlet excited state have been extracted from the quantum yields using time-dependent DFT calculations. Nonlinear transmission measurements indicate that all of the compounds show nonlinear absorption at 430 nm with 27 ps laser pulses in spite of their low solubilities. Notably, the nonlinear absorption threshold of a 0.16 mol L(-1) CH2Cl2 solution of BpP(Se)(C4H2S)2H is 0.9 J cm(-2). The excellent emission quantum yields and good nonlinear absorptions make these compounds promising candidates for optical power limiting applications and as host materials for violet-blue organic light emitting diodes.

  9. The hypoalgesic effects of low-intensity infrared laser therapy: a study on 555 cases

    Science.gov (United States)

    Tam, Giuseppe

    2004-09-01

    Objective: Low energy lasers are widely used to treat a variety of musculoskeletal conditions. The aim of this clinical study is to determine the action of the IR diode laser 904 nm pulsed on pain reduction therapy. Summary Background Data: With respect to pain, has been shown the Low power density laser increases the endorphin synthesis in the dorsal posterior horn of the spinal cord stopping the production of bradykinin and serotonin. Besides laser causes local vasodilatation of the capillaries and an improved circulation of drainage liquids in interstitial space causing an analgesic effect. Additionally, laser interferes in the cytochines (TNF-α, interleukin-1 and interleukin-6) that drive inflammation in the arthritis and are secreted from CD4 e T cells. Methods: Treatment was carried out on 555 cases and 525 patients (322 women and 203 men) in the period between 1987 and 2002. The patients, whose age ranged from 25 to 70, with a mean age of 45 years, were suffering from rheumatic, degenerative and traumatic pathologies. The majority of the patients had been seen by orthopaedists and rheumatologists and had undergone x-ray, ultrasound scanning, Tac, RM examination. All patients had received drug-based treatment and/or physiotherapy with poor results. Two thirds were experiencing acute symptomatic pain, while the others presented a chronic pathology with recurrent crises. We used a pulsed IR diode laser, GaAs 904 nm, maximum power 60 W, frequency impulse 1300 Hz, pulsed duration 200 nanoseconds; peak power per pulse 27W; maximal energy density: 9J/cm2; total number of Joules per treatment session: 10-75J/cm2, chronic 12-90J/cm2. Average number of applications: 12; maximum number of applications: 20. Results: In the evaluation of the results the following parameters have been considered: disappearance of spontaneous and induced pain (Likert scale, Rolland Morris disability scale, dynamometer). The pathologies treated were osteoarthritis in general, epicondylitis

  10. What can we learn about Mars from satellite magnetic field measurements?

    Science.gov (United States)

    Morschhauser, A.; Mittelholz, A.; Thomas, P.; Vervelidou, F.; Grott, M.; Johnson, C.; Lesur, V.; Lillis, R. J.

    2017-12-01

    .1111/j.1365-246X.2011.05153.x [8] B. Langlais and M. Purucker (2007), PSS, 10.1016/j.pss.2006.03.008 [8] F. Vervelidou et al., Constraining the date of the martian dynamo shutdown by means of craters' magnetization signatures, JGR, submitted 2017 [9] J. Arkani-Hamed and D. Boutin (2004), JGR, 10.1029/2003JE002229

  11. The Eastern side of the Westernmost Europeans: Insights from subclades within Y-chromosome haplogroup J-M304.

    Science.gov (United States)

    Manco, Licínio; Albuquerque, Joana; Sousa, Maria Francisca; Martiniano, Rui; de Oliveira, Ricardo Costa; Marques, Sofia; Gomes, Verónica; Amorim, António; Alvarez, Luís; Prata, Maria João

    2018-03-01

    We examined internal lineages and haplotype diversity in Portuguese samples belonging to J-M304 to improve the spatial and temporal understanding of the introduction of this haplogroup in Iberia, using the available knowledge about the phylogeography of its main branches, J1-M267 and J2-M172. A total of 110 males of Portuguese descent were analyzed for 17 Y-chromosome bi-allelic markers and seven Y-chromosome short tandem repeats (Y-STR) loci. Among J1-M267 individuals (n = 36), five different sub-haplogroups were identified, with the most common being J1a2b2-L147.1 (∼72%), which encompassed the majority of representatives of the J1a2b-P58 subclade. One sample belonged to the rare J1a1-M365.1 lineage and presented a core Y-STR haplotype consistent with the Iberian settlement during the fifth century by the Alans, a people of Iranian heritage. The analysis of J2-M172 Portuguese males (n = 74) enabled the detection of the two main subclades at very dissimilar frequencies, J2a-M410 (∼80%) and J2b-M12 (∼20%), among which the most common branches were J2a1(xJ2a1b,h)-L26 (22.9%), J2a1b(xJ2a1b1)-M67 (20.3%), J2a1h-L24 (27%), and J2b2-M241 (20.3%). While previous inferences based on modern haplogroup J Y-chromosomes implicated a main Neolithic dissemination, here we propose a later arrival of J lineages into Iberia using a combination of novel Portuguese Y-chromosomal data and recent evidence from ancient DNA. Our analysis suggests that a substantial tranche of J1-M267 lineages was likely carried into the Iberian Peninsula as a consequence of the trans-Mediterranean contacts during the first millennium BC, while most of the J2-M172 lineages may be associated with post-Neolithic population movements within Europe. © 2017 Wiley Periodicals, Inc.

  12. Thermal characterization of semiconducting polymer bulk heterojunctions

    Science.gov (United States)

    Remy, Roddel A.

    Polymer semiconductors are intriguing due to their potential use in flexible electronics. Poly (3-hexylthiophene) (P3HT)--a very common polymer in this field--is semicrystalline and it is known that crystalline P3HT has a higher hole mobility than amorphous P3HT. Quantifying each fraction in the bulk and thin film states is therefore crucial to understanding its performance in transistor and other applications. In polymer solar cells, it acts as an electron donor and is typically mixed with the nanoparticle-like molecule, phenyl-C61-butyric acid methyl ester (PCBM)--an electron acceptor--in a thin film morphology termed a bulk heterojunction (BHJ). The structural hierarchy within the bulk heterojunction is complicated and its characterization, with a focus on P3HT morphology, is the topic of this dissertation. Calorimetry can play an important role in the elucidation of P3HT morphology with quantitative analysis of the crystalline and amorphous fractions present in the material. This was demonstrated by employing differential scanning calorimetry (DSC) to obtain the enthalpy of fusion of 100% crystalline P3HT (42.9 J/g) using oligomeric P3HT measurements. The more sensitive temperature modulated DSC (TMDSC) was then used to examine the glass transition of P3HT and the crystalline, mobile amorphous and rigid amorphous phases were quantified. The presence of these phases can play a large role in understanding the charge transfer process in polymer semiconductors. BHJ thin films of 50 wt.% PCBM were then analyzed and a polymer crystallinity of 30% was found after thermal annealing from initially non-crystalline polymer material. With assistance from previously acquired small angle neutron scattering data, a thorough analysis of the entire BHJ morphology was accomplished. A surprisingly large rigid amorphous polymer phase is present in the BHJ which could be located at the P3HT/PCBM interface, affecting charge transfer. Finally, interlayer diffusion of PCBM was

  13. z ∼ 7 GALAXY CANDIDATES FROM NICMOS OBSERVATIONS OVER THE HDF-SOUTH AND THE CDF-SOUTH AND HDF-NORTH GOODS FIELDS

    International Nuclear Information System (INIS)

    Bouwens, Rychard J.; Illingworth, Garth D.; Gonzalez, Valentino; Holden, Brad; Magee, Dan; Labbe, Ivo; Franx, Marijn; Conselice, Christopher J.; Blakeslee, John; Van Dokkum, Pieter; Marchesini, Danilo; Zheng Wei

    2010-01-01

    We use ∼88 arcmin 2 of deep (∼>26.5 mag at 5σ) NICMOS data over the two GOODS fields and the HDF-South to conduct a search for bright z ∼> 7 galaxy candidates. This search takes advantage of an efficient preselection over 58 arcmin 2 of NICMOS H 160 -band data where only plausible z ∼> 7 candidates are followed up with NICMOS J 110 -band observations. ∼248 arcmin 2 of deep ground-based near-infrared data (∼>25.5 mag, 5σ) are also considered in the search. In total, we report 15 z 850 -dropout candidates over this area-7 of which are new to these search fields. Two possible z ∼ 9 J 110 -dropout candidates are also found, but seem unlikely to correspond to z ∼ 9 galaxies (given the estimated contamination levels). The present z ∼ 9 search is used to set upper limits on the prevalence of such sources. Rigorous testing is undertaken to establish the level of contamination of our selections by photometric scatter, low-mass stars, supernovae, and spurious sources. The estimated contamination rate of our z ∼ 7 selection is ∼24%. Through careful simulations, the effective volume available to our z ∼> 7 selections is estimated and used to establish constraints on the volume density of luminous (L* z =3 , or ∼-21 mag) galaxies from these searches. We find that the volume density of luminous star-forming galaxies at z ∼ 7 is 13 +8 -5 times lower than at z ∼ 4 and >25 times lower (1σ) at z ∼ 9 than at z ∼ 4. This is the most stringent constraint yet available on the volume density of ∼>L* z =3 galaxies at z ∼ 9. The present wide-area, multi-field search limits cosmic variance to ∼ 850 -dropout sample (18 candidates) identified from all NICMOS observations to date (over the two GOODS fields, the HUDF, galaxy clusters).

  14. Pulse Generator Exchange Does Not Accelerate the Rate of Electrical Failure in a Recalled Small Caliber ICD Lead.

    Science.gov (United States)

    Lovelock, Joshua D; Premkumar, Ajay; Levy, Mathew R; Mengistu, Andenet; Hoskins, Michael H; El-Chami, Mikhael F; Lloyd, Michael S; Leon, Angel R; Langberg, Jonathan J; Delurgio, David B

    2015-12-01

    St. Jude Riata/Riata ST defibrillator leads (St. Jude Medical, Sylmar, CA, USA) were recalled by the Food and Drug Administration in 2011 for an increased rate of failure. More than 227,000 leads were implanted and at least 79,000 patients still have active Riata leads. Studies have examined clinical predictors of lead failure in Riata leads, but none have addressed the effect of implantable cardioverter defibrillator (ICD) generator exchange on lead failure. The purpose of this study is to assess the effect of ICD generator exchange on the rate of electrical failure in the Riata lead at 1 year. A retrospective chart review was conducted in patients who underwent implantation of a Riata/Riata ST lead at one center. Patients with a functioning Riata lead (with/without externalized conductor) at the time of ICD exchange were compared to controls with Riata leads implanted for a comparable amount of time who did not undergo generator replacement. Riata leads were implanted in 1,042 patients prior to the recall and 153 of these patients underwent generator exchange without lead replacement. Conductor externalization was noted in 21.5% of Riata leads in the ICD exchange cohort, which was not different from the control group (19.2%; P = 0.32). Two leads failed in the first year after generator replacement (1.5%) which did not significantly differ from the control group (2.0%; P = 0.57). At change-out, 54% received a commanded shock (18.6 ± 0.9 J) that did not result in any change in the high-voltage lead impedance (46.1 ± 1.1 ohms). Conductor externalization was seen frequently in our cohort of patients. ICD generator exchange did not accelerate the rate of Riata lead failure at 1 year. Although both the control and the change-out cohorts failed at a rate much greater than nonrecalled leads, generator exchange did not appear to add to the problem. ©2015 Wiley Periodicals, Inc.

  15. Experimental investigation of performance, exhaust emission and combustion parameters of stationary compression ignition engine using ethanol fumigation in dual fuel mode

    International Nuclear Information System (INIS)

    Jamuwa, D.K.; Sharma, D.; Soni, S.L.

    2016-01-01

    ethanol content. The rise in peak pressure of cycle, heat release rate and ignition delay along with decrease in combustion duration for different rates of ethanol fumigation have been observed. The increasing fumigation levels of ethanol results in the increase of maximum rate of pressure rise by 0.3–0.5 bar/°crank angle and the crank angle after top dead centre, where peak pressure occurs, shifts by 1–4° of crank angle. It is also observed that maximum heat release rate increases by 2–9 J/°crank angle as compared to baseline diesel case. Coefficient of Variance of indicated mean effective pressure increases with ethanol fumigation.

  16. Kinetics of the R + HBr ↔ RH + Br (CH3CHBr, CHBr2 or CDBr2) equilibrium. Thermochemistry of the CH3CHBr and CHBr2 radicals

    International Nuclear Information System (INIS)

    Seetula, Jorma A.; Eskola, Arkke J.

    2008-01-01

    The kinetics of the reaction of the CH 3 CHBr, CHBr 2 or CDBr 2 radicals, R, with HBr have been investigated in a temperature-controlled tubular reactor coupled to a photoionization mass spectrometer. The CH 3 CHBr (or CHBr 2 or CDBr 2 ) radical was produced homogeneously in the reactor by a pulsed 248 nm exciplex laser photolysis of CH 3 CHBr 2 (or CHBr 3 or CDBr 3 ). The decay of R was monitored as a function of HBr concentration under pseudo-first-order conditions to determine the rate constants as a function of temperature. The reactions were studied separately from 253 to 344 K (CH 3 CHBr + HBr) and from 288 to 477 K (CHBr 2 + HBr) and in these temperature ranges the rate constants determined were fitted to an Arrhenius expression (error limits stated are 1σ + Student's t values, units in cm 3 molecule -1 s -1 , no error limits for the third reaction): k(CH 3 CHBr + HBr) = (1.7 ± 1.2) x 10 -13 exp[+ (5.1 ± 1.9) kJ mol -1 /RT], k(CHBr 2 + HBr) = (2.5 ± 1.2) x 10 -13 exp[-(4.04 ± 1.14) kJ mol -1 /RT] and k(CDBr 2 + HBr) = 1.6 x 10 -13 exp(-2.1 kJ mol -1 /RT). The energy barriers of the reverse reactions were taken from the literature. The enthalpy of formation values of the CH 3 CHBr and CHBr 2 radicals and an experimental entropy value at 298 K for the CH 3 CHBr radical were obtained using a second-law method. The result for the entropy value for the CH 3 CHBr radical is 305 ± 9 J K -1 mol -1 . The results for the enthalpy of formation values at 298 K are (in kJ mol -1 ): 133.4 ± 3.4 (CH 3 CHBr) and 199.1 ± 2.7 (CHBr 2 ), and for α-C-H bond dissociation energies of analogous compounds are (in kJ mol -1 ): 415.0 ± 2.7 (CH 3 CH 2 Br) and 412.6 ± 2.7 (CH 2 Br 2 ), respectively

  17. Composition and thermochemistry of the equilibrium vapour of the systems NaI-FeI2 and NaI-PbI2

    International Nuclear Information System (INIS)

    Hilpert, K.; Gerads, H.; Koberts, D.; Miller, M.

    1987-01-01

    The vaporization of NaI/FeI 2 and NaI/PbI 2 samples of equimolar composition was investigated was investigated in the temperature ranges between 574 to 683 K and 562 to 669 K, respectively, by using the mass spectrometric Knudsen effusion method. The gaseous species I, I 2 , NaI, (NaI) 2 , FeI 2 , (FeI 2 ) 2 , FeI 3 , NaFeI 3 , and Na 2 FeI 4 (NaI-FeI 2 system) as well as NaI, (NaI) 2 , PbI 2 , (PbI 2 ) 2 , and NaPbI 3 (NaI-PbI 2 system) are present in the equilibrium vapours. The equilibrium partial pressures of these species were determined with the exception of I, I 2 , and FeI 3 . Enthalpies and entropies of dissociation resulted for the reactions NaFeI 3 (g) ↔ NaI(g)+FeI 2 (g) (1), Na 2 FeI 4 (g) ↔ 2NaI(g)+FeI 2 (g) and (2) NaPbI 3 (g) ↔ NaI(g)+PbI 2 (g) (3) as Δ d H 298 0 (Eq. (1)) = 184±5 kJ mol -1 , Δ d S 298 0 (Eq. (1)) = 143±8 J mol -1 K -1 ; Δ d H 298 0 (Eq. (2)) = 333±9 kJ mol -1 , Δ d S 298 0 (Eq. (2)) = 274±14 J mol -1 K -1 ; and Δ d H 298 0 (Eq. (3)) = 168±5 kJ mol -1 , Δ d S 298 0 (Eq. (3)) = 151±9 J mol -1 K -1 . Equilibrium constants for these reactions are additionally given. The pressures of NaFeI 3 (g) and NaPbI 3 (g) as all as their enthalpies of dissociation are discussed with respect to their significance of semi empirical rules. (orig.)

  18. Solubilidade de micronutrientes contidos em formulações de fertilizantes, em extratores químicos Micronutrient solubility in fertilizer mixtures by chemical extractors

    Directory of Open Access Journals (Sweden)

    J. C. Alcarde

    2003-04-01

    Full Text Available A legislação brasileira adota o teor total para a garantia dos micronutrientes em fertilizantes. Isso permite a utilização de subprodutos de várias origens, baratos, mas que nem sempre apresentam os micronutrientes em formas disponíveis às plantas. Estudou-se a solubilidade dos micronutrientes em formulações de fertilizantes, utilizando os extratores água e soluções de ácido cítrico 20 g L-1 e citrato neutro de amônio (1 + 9, já usados na avaliação de matérias-primas. Os resultados foram semelhantes, tanto na avaliação das formulações como de matérias-primas, isto é, a solução de ácido cítrico a 20 g L-1 possibilita avaliar, com mais segurança, o conteúdo de micronutrientes em formulações de fertilizantes, representando uma alternativa para o teor total, que não é um critério adequado, do ponto de vista agronômico, para avaliar os micronutrientes contidos em fertilizantes.In Brazilian legislation, the control for micronutrient concentrations in mineral fertilizers considers the total content. As a consequence, low-cost by-products and even industrial residues are generally used as a source for micronutrients, despite their low availability to plants. To evaluate fertilizer solubilities, water, citric acid 20 g L-1, and neutral ammonium citrate (1 + 9 extracting solutions were applied to mixtures containing micronutrients. The same study was realized for micronutrient sources. Results were similar for both sources and mixtures. Citric acid solution 20 g L-1 was the most promising option to evaluate micronutrient contents in fertilizer mixtures. From the agronomic point of view, the total content is an inadequate criterion for the determination of micronutrient contents in chemical fertilizers.

  19. Energy and nitrogen budgets for larval and aduit Paropsis charybdis Stål (Coleoptera: Chrysomelidae) feeding on Eucalyptus viminalis.

    Science.gov (United States)

    Edwards, Penelope B; Wightman, John A

    1984-03-01

    (MR = C +NU) was 194.3 mg, 3978.9 J or 4.527 mgN. NU per day for an average adult was 4.86 mg, 99.5 J or 0.113 mgN. Therefore adults removed 32.33 mg, 659.9 J or 0.751 mgN per day. (8) Ecological efficiencies (energy) of P. charybdis larvae (using P = P L * + P EX and A = assimilation + C - FU ) were: net ecological efficiency (P.A. -1 )=56.8%, gross ecological efficiency (P.C -1 )=15.2%, assimilation efficiency (A.C. -1 )=26.8%, P.R. -1 =121.5%. Adult efficiencies were: P. A. -1 =28.6%, P.C. -1 =11.1%, A.C. -1 =38.7% and P.R. -1 =55.7%. Efficiencies in terms of nitrogen were (larval data followed by adult data in parentheses): P.A. -1 =97.2 (71.4)%, P.C. -1 =56.9 (39.5)% and A.C. -1 =58.6 (55.3)%. (9) Regressions were calculated to link larval length (1) or larval live weight (lwt) and the dry weight of leaf material removed from a tree by that individual so that these results can be readily applied to field studies: logMR = -2.042 + 3.418 log1 logMR = -0.728 + 1.023 log 1wt.

  20. Magnetic ordering of Hf{sub 3}Ni{sub 2}Si{sub 3}-type {Sm, Tb, Er}{sub 3}Co{sub 2}Ge{sub 3} and {Tb, Ho}{sub 3}Ni{sub 2}Ge{sub 3} compounds

    Energy Technology Data Exchange (ETDEWEB)

    Morozkin, A.V., E-mail: morozkin@tech.chem.msu.ru [Department of Chemistry, Moscow State University, Leninskie Gory, House 1, Building 3, Moscow, GSP-1, 119991 (Russian Federation); Yapaskurt, V.O. [Department of Petrology, Geological Faculty Moscow State University, Leninskie Gory, Moscow 119991 (Russian Federation); Nirmala, R. [Indian Institute of Technology Madras, Chennai 600036 (India); Quezado, S.; Malik, S.K. [Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, Natal 59082-970 (Brazil); Mozharivskyj, Y. [Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1 (Canada); Isnard, O. [CNRS, Institut. Néel, 25 rue des Martyrs BP166 x, F-38042 Grenoble (France); Université Grenoble Alpes, Inst. Néel, F-38042 Grenoble (France)

    2017-02-15

    The magnetic ordering of Hf{sub 3}Ni{sub 2}Si{sub 3}-type {Sm, Tb, Er}{sub 3}Co{sub 2}Ge{sub 3} and {Tb, Ho}{sub 3}Ni{sub 2}Ge{sub 3} compounds (space group Cmcm, oC32) was investigated via magnetization measurements and neutron diffraction study in a zero-applied field. {Sm, Tb, Er}{sub 3}Co{sub 2}Ge{sub 3} and Ho{sub 3}Ni{sub 2}Ge{sub 3} exhibit field sensitive complex antiferromagnetic orderings with T{sub N}=51 K, T{sub m}=10 K for Sm{sub 3}Co{sub 2}Ge{sub 3}, T{sub N}=34 K, T{sub m}=13 K for Tb{sub 3}Co{sub 2}Ge{sub 3}, T{sub N}=7 K for Er{sub 3}Co{sub 2}Ge{sub 3} and T{sub N}=11 K for Ho{sub 3}Ni{sub 2}Ge{sub 3}. At 2 K and above the critical field of ~5 kOe, 20 kOe, 4 kOe and 7 kOe for Sm{sub 3}Co{sub 2}Ge{sub 3}, Tb{sub 3}Co{sub 2}Ge{sub 3}, Er{sub 3}Co{sub 2}Ge{sub 3} and Ho{sub 3}Ni{sub 2}Ge{sub 3}, respectively, saturation magnetizations per rare-earth atom are 6.5 μ{sub B} for Tb{sub 3}Co{sub 2}Ge{sub 3}, 7.0 μ{sub B} for Er{sub 3}Co{sub 2}Ge{sub 3} and 8.0 μ{sub B} for Ho{sub 3}Ni{sub 2}Ge{sub 3} in the field of 140 kOe, whereas magnetization of Sm{sub 3}Co{sub 2}Ge{sub 3} has an antiferromagnetic behaviour. The isothermal magnetic entropy change, ΔS{sub m}, indicates a field-induced ferromagnetic ordering in Sm{sub 3}Co{sub 2}Ge{sub 3}, Tb{sub 3}Co{sub 2}Ge3, Er{sub 3}Co{sub 2}Ge{sub 3} and Ho{sub 3}Ni{sub 2}Ge{sub 3} with a maximal ΔS{sub m} value of −10.9 J/kg K for Ho{sub 3}Ni{sub 2}Ge{sub 3} at 11 K for a field change of 50 kOe. In a zero-applied magnetic field, below T{sub N}=33 K and down to T{sub m}{sup ND}=15 K Tb{sub 3}Ni{sub 2}Ge{sub 3} shows an ac-antiferromagnetic ordering with the C2′/c magnetic space group, a K{sub 0}=[0, 0, 0] propagation vector and a a{sub Tb3Ni2Ge3}×b{sub Tb3Ni2Ge3}×c{sub Tb3Ni2Ge3} magnetic unit cell. Below T{sub m}{sup ND}=15 K, its magnetic structure is a sum of the ac-antiferromagnetic component with the C2′/c magnetic space group of the K{sub 0} vector and a sine-modulated a

  1. In vitro effect of Q-switched Nd:YAG laser exposure on morphology, hydroxyapatite composition and microhardness properties of human dentin

    Directory of Open Access Journals (Sweden)

    Retna Apsari

    2011-12-01

    Full Text Available Background: A Q-switched Nd:YAG laser was employed as a source of ablation. The fundamental wavelength of the laser is 1064 nm, with pulse duration of 8 nanosecond operates with uniphase mode of TEM00. In the following experiments, dentin samples (without caries and plaque are exposed to pulse laser with Q-switching effect at various energy dose. Purpose: The aim of this study was to investigate the effect of laser ablation on dentin samples using Q-switched Nd:YAG laser exposure. Methods: The laser was operated in repetitive mode with frequency of 10 Hz. The energy dose of the laser was ranging from 13.9 J/cm2, 21.2 J/cm2 and 41.7 J/cm2. The target material comprised of human dentin. The laser was exposed in one mode with Q-switched Nd:YAG laser. Energy delivered to the target through free beam technique. The exposed human dentin was examined by using x-ray diffraction (XRD and fluoresence scanning electron microscopy for energy dispersive (FESEM-EDAX. Microhardness of human dentin were examined by using microhardness vickers test (MVT. Results: The result obtained showed that the composition of hydroxyapatite of the dentin after exposed by Q-switched Nd:YAG laser are 75.02% to 78.21%, with microhardness of 38.7 kgf/mm2 to 86.6 kgf/mm2. This indicated that exposed pulsed Nd:YAG laser on the human dentin attributed to the phototermal effect. The power density created by the Q-switched Nd:YAG laser enables the heat to produce optical breakdown (melting and hole associated with plasma formation and shock wave propagation, from energy dose of 21.2 J/cm2. From XRD analysis showed that the exposure of Nd:YAG laser did not involve in changing the crystal structure of the dentin, but due to photoablation effect. Conclusion: In conclusion, the application of Q-switched Nd:YAG laser as contactless drills in dentistry should be regarded as an alternative to the classical mechanical technique to improve the quality of the dentin treatment.Latar belakang

  2. Suitability of Cadmium Tantalate and Indium Tantalate as Control Materials for High-Temperature Reactors; Le Tantalate de Cadmium et le Tantalate d'Indium Comme Absorbants pour les Reacteurs a Haute Temperature; Vozmozhnosti ispol'zovaniya tantalatov kadmiya i indiya v kachestve kontrol'nogo materiala dlya vysokotemperaturnykh reaktorov; Empleo del Tantalato de Cadmio y del Tantalato de Indio Como Materiales de Control Para Reactores de Alta Temperatura

    Energy Technology Data Exchange (ETDEWEB)

    Preisler, E.; Haessner, F.; Petzow, G. [Max-Planck-Institut fuer Metallforschung, Stuttgart, Federal Republic of Germany (Germany)

    1964-06-15

    apropiados los oxidos dobles CdWO{sub 4}, Cd {sub 2}Ta{sub 2}O{sub 7} y CdIn{sub 2}O{sub 2} , CdjTajO, y Cdln204 . De estos, el que mas resistencia termica tiene es el tantalato de cadmio. Otro oxido doble que posee, en combinacion con el tantalato de cadmio, un espectro apropiado de absorcion neutronica es el tantalato de indio. Su resistencia termica es tambien satisfactoria. Dado que los absorbentes a base de material ceramico han de ser a menudo moldeados por deformacion plastica, se suelen emplear en forma de cermets. Por lo tanto, han de ser compatibles con metales. El tantalato de cadmio es compatible con la plata y con el cobre y tambien lo es con el niquel hasta 700 Degree-Sign C; el tantalato de indio es completamente compatible con la plata, el cobre y el niquel, y tambien, hasta 700 Degree-Sign C, con el molibdeno y, hasta cierto punto, con el hierro.' Estos resultados concuerdan con los calculos termodinamicos. Para juzgar el comportamiento de los materiales absorbentes en las condiciones propias de un reactor, hay que considerar los productos descendientes que se originan por absorcion neutronica. Si bien el {sup 113}Cd se transforma en {sup 114}Cd estable, el tantalo se transmuta en volframio, y el indio, en estano. Ambos productos descendientes pueden fijar, en sus estados de valencia mas estables, una mayor proporcion de oxigeno que los elementos ascendientes. Asi pues, es de esperar que el Cd{sup ++} se reduzca pasando a la forma metalica, y que, en cambio, el tantalato de indio permanezca estable. Ello se ha confirmado experimentalmente agregando SnO y WO{sub 2} a tantalato de cadmio. Este efecto puede eliminarse anadiendo oxido cuproso a los compuestos. (author) [Russian] Nezavisimo ot trebovanija v kazhdom otdel'nom sluchae, kontrol'nye materialy, prednaznachennye dlja prakticheskogo ispol'zovanija v vysokotemperaturnyh reaktorah dolzhny obladat' sledujushhimi svojstvami: I . a) vysokim pogloshheniem poperechnogo sechenija nejtronov v shirokom diapazone

  3. Administrative Co-ordination of Fissile Material Management and Accounting in the U.K.A.E.A; Coordination Administrative de la Gestion et de la Comptabilite des Matieres Fissiles dans les Etabussements de l'Autorite de l'Energie Atomique du Royaume-Uni; Administrativnaya koordinatsiya kontrolya i ucheta delyashchikhsya materialov v upravlenii po atomnoj ehnergii soedinennogo korolevstva; Coordinacion Administrativa de la Gestion y la Contabilidad de Materiales Fisionables en la Comision de Energia Atomica del Reino Unido

    Energy Technology Data Exchange (ETDEWEB)

    Hood, St. C.C. [United Kingdom Atomic Energy Authority, London (United Kingdom)

    1966-02-15

    , recuperacion de desechos, importacion - y todas las cantidades empleadas, incluidos los materiales agotados, las perdidas y las exportaciones; b) recomiendan la mejor manera de asignar cantidades determinadas de materiales para fines aprobados, teniendo en cuenta el conjunto de las necesidades, el volumen de las existencias y los aspectos economicos de la operacion; c) registran y controlan todas las asignaciones aprobadas; en relacion con los criterios y los objectivos establecidos, verifican la naturaleza de los materiales que se estan utilizando, sus cantidades, y los fines a que se les destina; d) registran y estudian todas las perdidas de material fisionable que se producen durante los procesos de elaboracion y tratamiento, asf como las medidas adoptadas para evitar dichas perdidas; e) contribuyen a establecer procedimientos y a crear incentivos para lograr que los materiales se empleen con economia y se devuelvan con rapidez. (author) [Russian] Kak postavshhik deljashhihsja materialov Upravlenie po atomnoj jenergii zanimaetsja ih proizvodstvom, raspredeleniem i pererabotkoj. Upravleniju, kak potrebitelju, deljashhiesja materialy nuzhny dlja ispol'zovanija v kachestve topliva v opytnyh jenergeticheskih reaktorah razlichnyh tipov, reaktorah dlja ispytanija materialov, issledovatel'skih reaktorah nulevoj moshhnosti, v rabotah po sozdaniju novyh tipov teplovydeljajushhih jelementov, a takzhe dlja provedenija laboratornyh jeksperimentov i issledovanij. Ispolnitel'nye funkcii po jetim vidam dejatel'nosti vozlozheny na chetyre strukturnyh podrazdelenija upravlenija (gruppy). Bylo najdeno poleznym derzhat' jeti vidy dejatel'nosti pod nabljudeniem special'nyh mezhgruppovyh komitetov s obshhim sekretariatom. Jeti komitety: a) zanimajutsja izucheniem vseh proektov ili predlozhenij otnositel'no rabot, svjazannyh so znachitel'nymi kolichestvami deljashhihsja materialov (plutonija i obogashhennogo urana pomimo prirodnogo urana ili obednennogo urana) v svete ozhidaemyh postavok za

  4. Materials Control in the Fabrication of Enriched Uranium Fuels; Controle des Matieres au Cours de la Fabrication des Combustibles a Base d'Uranium Enrichi; Uchet materialov pri izgotovlenii topliva na obogashchennom urane; Control de Materiales en la Elaboracion de Combustibles de Uranio Enriquecido

    Energy Technology Data Exchange (ETDEWEB)

    Cardwell, Jr., R. G. [Oak Ridge National Laboratory, Oak Ridge, TN (United States)

    1966-02-15

    rashozhdenij; 3) svedenie maksimal'nogo chisla proverok v minimal'noe chislo zapjsej vo izbezhanie povtorenij i 4) vvedenie v sistemu dostatochnogo chisla perekrestnyh proverok dlja obespechenija nadezhnosti. V kazhdoj programme izgotovlenija uspeh obespechivalo vvedenie edinoobraznoj procedury na sledujushhih stadijah: 1) ishodnye materialy v tom vide, kak oni poluchajutsja; 2) izgotovlenie komponentov; 3) obrabotka komponentov i 4) obrashhenie s lomom. Svedenie dannyh ucheta v obshhuju glavnuju svodku okazalos' poleznym dlja podtverzhdenija pravil'nosti material'noj inventarizacii, dlja ocenki tehnologicheskih processov izgotovlenija i dlja sostavlenija otchetov dlja rukovodstva. Vyrabotka metodov vyborki prob i izuchenie rezul'tatov pokazali, chto dlja dostizhenija pravil'nogo sostava topliva neobhodimo proizvodit' mnogokratnyj kontrol'. V sluchajah, kogda samym vazhnym predstavljaetsja sostav topliva v vide splava, uspeshno primenjali mehanicheskoe gruppirovanie i izmerenie plotnosti. Obrashhenie s lomom igraet bol'shuju rol' v ustanovlenii material'nogo balansa, kotoryj pozvoljaet podtverdit' pravil'nost' sostava topliva i obespechivaet horoshee vedenie otchetnosti. Zapisi i instrukcii po obrashheniju s materialami, vkljuchaja metody sostavlenija partij i fizicheskoj markirovki, formulirovalis' takim obrazom, chtoby oni mogli byt' poleznymi dlja izgotovitelja pri kontrole nad kritichnost'ju. (author)

  5. An Appraisal of Analytical Methods for Plutonium and their Applications to the Analysis of Nuclear Materials; Evaluation des Methodes Analytiques de Dosage du Plutonium et de Leur Application a l'Analyse des Matieres Nucleaires; Otsenka analiticheskikh metodov opredeleniya plutoniya i ikh primenenie dlya analiza yadernykh materialov; Metodos Analiticos de Determinacion del Plutonio y su Empleo en el Analisis de Materiales Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Milner, G. W.C.; Phillips, G. [Atomic Energy Research Establishment, Harwell, Berks. (United Kingdom)

    1966-02-15

    hromatograficheskogo sposoba obratnoj fazy, prichem osoboe vnimanie obrashhaetsja na ih prigodnost' dlja radioaktivnyh obrazcov. Udeljaetsja vnimanie mnogim problemam, kotorye voznikajut pri uspeshnom primenenii jetih metodov dlja analiza splavov plutonija, keramiki i kermetov v razlichnyh sistemah, soderzhashhih uran, torij, zhelezo, hrom, molibden, cerij i kobal't. Opisyvajutsja trudnosti, voznikajushhie pri rastvorenii obrazcov i pri podgonke plutonija k trebuemomu sostojaniju valentnosti. V doklade na primerah kommentirujutsja sootvetstvujushhie preimushhestva rastvorenija v smesjah obychnyh mineral'nyh kislot s pomoshh'ju plavlenija. Izlagajutsja procedury s odnovremennym opisaniem analiticheskih rezul'tatov dlja tipichnyh obrazcov s cel'ju ispol'zovanija ih dlja analizov splavov Pu-U, Pu-Ce-Co i Pu-U-Mo, okisej i karbidov Pu-U karbidnyh kermetov Pu-U s dobavleniem Fe, M.o i Sg. Jeti materialy polucheny na osnove metallurgicheskih issledovanij i programmnyh razrabotok dlja novogo jadernogo topliva. (author)

  6. The Use of Research Reactors and Short-Lived Isotopes in the Study of Nuclear-Reactor Fuel Materials; Emploi de Reacteurs de Recherche et de Radioisotopes de Courte Periode dans l'Etude des Combustibles pour Reacteurs Nucleaires; ИСПОЛЬЗОВАНИЕ ИССЛЕДОВАТЕЛЬСКИХ РЕАКТОРОВ И КОРОТКОЖИВУЩИХ ИЗОТОПОВ ПРИ ИЗУЧЕНИИ ТОПЛИВНЫХ МАТЕРИАЛОВ ДЛЯ ЯДЕРННХ РЕАКТОРОВ; Empleo de Reactores de Investigacion y de Isotopos de Periodo Corto en el Estudio de Combustibles Nucleares

    Energy Technology Data Exchange (ETDEWEB)

    Elleman, T. S.; Townley, C. W.; Sunderman, D. N. [Battelle Memorial Institute, Columbus, OH (United States)

    1963-03-15

    tipos de materiales sin que sea preciso emplear grandes reactores de ensayo ni recintos blindados para manipular muestras irradiadas de elevada actividad. (author) [Russian] Issledovatel'skij reaktor mozhet byt' ispol'zovan dlja izuchenija podvizhnosti produktov delenija v prototipah jadernyh toplivnyh materialov, tak kak on pozvoljaet vosproizvodit' vneshnie uslovija analogichnye tem, v kotoryh okazyvajutsja toplivnye materialy v uslovijah normal'noj jekspluatacii. Vmeste s tem on pozvoljaet tochno kontrolirovat' uslovija jeksperimenta i obespechivaet mnogoobrazie jeksperimental'nyh konstrukcij. Izmeneniem uslovij obluchenija i putem kolichestvennogo opredelenija vydeljajushhihsja iz obrazca produktov delenija s korotkim poluperiodom raspada mozhno ustanovit' mehanizm vysvobozhdenija produktov delenija i ego svjaz' s fizicheskimi i himicheskimi svojstvami obrazca topliva i produktov delenija. Pomimo jetogo, mogut byt' polucheny poleznye svedenija otnositel'no obshhego kolichestva vydeljaemoj radioaktivnosti i pred- polagaemogogo sroka raboty toplivnyh jelementov. Obrazcy obychno obluchajutsja v podogrevaemyh kapsulah s dvojnymi stenkami, pogruzhaemyh a bassejn reaktora ili v reaktornye kanaly dlja obluchenija, a vydeljaemye letuchie produkty delenija uvlekajutsja iz kapsuly struej gaza. Vvidu togo, chto sootnoshenie mezhdu skorost'ju vysvobozhdenija i poluperiodom zhizni radioizotopa javljajutsja vazhnym pokazatelem mehanizma vydelenija, sobirajutsja i analizirujutsja gazy delenija kripton i ksenon s poluperiodami zhizni ot 1,7 sek do 5,3 dnej. Korotkozhivushhie redkie gazy (kripton-89, kripton-91, kripton-92, ksenon-137, ksenon-138, ksenon-139, ksenon-140 i ksenon-141) opredeljajutsja putem sbora neletuchih radioaktivnyh dochernih produktov na zarjazhennom jelektrode dlja posledujushhego radiohimicheskogo analiza, togda kak gazoobraznye produkty delenija s bolee dlitel'nym poluperiodom zhizni (kripton-85, kripton-87, kripton-88, jod-131, ksenon-133 i ksenon-135

  7. Short-Lived Isotopes Used as Tracers in Industry (with Special Reference to Swedish Industry); Emploi de Radioindicateurs de Courte Periode a l'Echelle Industrielie dans les Usines Suedoises; ПРИМЕНЕНИЕ КОРОТКОЖИВУЩИХ ИЗОТОПОВ В ПРОМЫШЛЕННОСТИ В КАЧЕСТВЕ МЕЧЕНЫХ АТОМОВ; Isotopos de Periodo Corto Utilizados Como Indicadores en la Industria Sueca

    Energy Technology Data Exchange (ETDEWEB)

    Erwall, L. G.; Forsberg, H. G.; Ljunggren, K. [Isotoptekniska Laboratoriet, Stockholm (Sweden)

    1963-03-15

    prestar asistencia a las empresas industriales proporcionandoles asesoiamiento, personal y los instrumentos necesarios para las aplicaciones industriales de los radioisotopos. (author) [Russian] Metody radioaktivnyh mechenyh atomov bystro nahodjat svoe priznanie kak neocenimoe sredstvo dlja issledovanij i kontrolja v promyshlennosti. Oni uhe uspeshno primenjalis' v avarijnyh sluchajah, pri issle- dovanii harakteristik proizvodstvennyh uzlov i kak vspomogatel'noe sredstvo pri konstruirovanii takih proizvodstvennyh uzlov. Dannyj obzor soderzhit tipichnye primery primenenija korotkozhivushhih mechenyh atomov, kotorye mogut byt' polucheny v umerennyh nejtronnyh potokah, naprimer,natrija-24, magnija-56, broma-62, lantana-140, a takzhe hlora-38, kalija-42 i zolota-196. S pomoshh'ju korotkozhivushhih izotopov mozhno proizvodit': - izuchenie prohozhdenija tverdyh veshhestv cherez proizvodstvennye uzly (vrashhavshiesja sushil'nye pechi, domennye pechi, celljuloznye avtoklavy, bashni dlja otbelki, sgustiteli Dorra) ; - opredelenie skorosti potoka zhidkostej v trubah i v otkrytyh ruslah (naprimer, dlja izmerenija obshego kolichestva potreblenija vody na ustanovke); - opredelenie vremeni nahozhdenija zaderzhki i ob{sup e}ma zhidkostej v razlichnyh tehnologicheskih uzlah v celljuloznoj i bumazhnoj promyshlennosti - ''vzveshivanie'' po metodu izotopnogo razbavlenija dlja opredelenija kolichestva shlakov v martenovskih pechah; - opredelenie proishozhdenija nemetallicheskih primesej v stali dlja izyskanija luchshih materialov dlja oblicovki i dlja usovershenstvovanija metodov otlivki; - mechenie dlja opredelenija kachestva, pozvoljajushhee ustanovit' s absoljutnoj dostovernost'ju jeksperimental'nye stal'nye plavki i specificheskie materialy v chernoj metallurgii; - opredelenie jeffektivnosti mesilok v betonnoj promyshlennosti; - sostavlenie diagramm potoka v bassejnah dlja stochnyh vod ili zhidkih othodov v celjah nahozhdenija nailuchshego mesta dlja spuska takih zhidkostej

  8. Studies on radiation-image detectors; Etudes sur les detecteurs a images de rayonnements; Izuchenie detektorov izobrazheniya radiatsii; Estudios sobre detectores de radiaciones productores de imagenes

    Energy Technology Data Exchange (ETDEWEB)

    Reiffel, L [Armour Research Foundation, Chicago, IL (United States)

    1962-04-15

    }mkoj raspredeleniya iskr. Pri rabote s issledovatel'skim reaktorom Armor na rezhime maloj moshchnosti za desyat' MINUT byla zasnyata kartina raspredeleniya nejtronov po Laueh; pikovyj potok aktivnoj zony sostavlyal 10{sup 11} nv, a kollimator sostoyal iz pryamoj trubki diametrom 1 X 1 cm. Opisano primenenie ehtikh schetchikov dlya drugikh nejtronnykh issledovanij s ukazaniem nailuchshej dostizhimoj razreshayushchej sposobnosti, kotoraya mozhet byt' poluchena pri men'shikh rasstoyaniyakh mezhdu ehlektrodami, ispol'zovanii dinamicheskoj razvertki, a, vozmozhno, i pri prostranstvennom fil'trovanii opticheskogo izobrazheniya. Vtorym obshchim podkhodom k obnaruzheniyu izobrazheniya, vyzyvaemogo radiatsiej, yavlyaetsya ispol'zovanie v preobrazovatele lyuminestsiruyushchikh i fosforestsiruyushchikh ehkranov. V nastoyashchee vremya ispytyvayutsya matritsy lyuminestsiruyushchikh volokon, sostoyashchikh iz ves'ma tonkikh steklyannykh trubok, napolnennykh stsintillyatsionnoj zhidkost'yu. EHti matritsy oka- zyvayutsya poleznymi pri obnaruzhenii rentgenovskikh luchej i gamma-izluchenij; dlya polucheniya chuvstvitel'nosti k nejtronam MOGUT ''zaryazhat'sya'' libo materialy stenok, libo soderzhashchayasya vnutri trubok zhidkost'. BUDUT izlozheny novye metody vyrabotki lyuminestsiruyushchikh voloknistykh ehkranov razlichnogo tipa s ukazaniem ikh opticheskikh svojstv, chto takzhe tesno svyazano s tekhnologiej stsintillyatsionnykh kamer. BUDUT kratko obsuzhdeny vozmozhnosti postrojki vosproizvodyashchikh izobrazheniya detektorov s ispol'zovaniem tolstykh blokov materiala, sposobnykh khranit' znachitel'nyj zapas ehnergii i vyzyvat' fosforestsentsiyu pri ikh obluchenii; budut takzhe opisany metody otscheta pokazanij pri pomoshchi opticheskoj razvertki luchej dlya ustraneniya poter' v razreshayushchej sposobnosti iz-za konechnoj tolshchiny lyuminofora. (author)

  9. Cold storage condensation heat recovery system with a novel composite phase change material

    International Nuclear Information System (INIS)

    Xia, Mingzhu; Yuan, Yanping; Zhao, Xudong; Cao, Xiaoling; Tang, Zhonghua

    2016-01-01

    Highlights: • Cold storage condensation heat recovery system using PCM was proposed. • CW with a phase change temperature of nearly 80 °C was selected as the potential PCM. • The optimal mass ratio between the CW and EG was 10:1. • The thermal and physical performances of the CW/EG were investigated. • The thermal reliability was demonstrated by 1000 cycles. - Abstract: Using condensation heat from cold storage refrigeration systems to provide heat for domestic hot water preparation and industrial hot water supply promotes energy conservation. However, few studies have investigated cold storage condensation heat recovery using phase change materials (PCMs). In this study, a cold storage condensation heat recovery system that uses PCMs has been designed and analysed. According to the principle of energy cascade recycling, different operation modes could be effectively switched to recycle condensation heat. Furthermore, a novel and suitable phase change composite material is developed for cold storage condensation heat recovery, which has a relatively large latent heat, high thermal conductivity, and an appropriate phase change temperature (i.e. 80 °C). With carnauba wax (CW) as the PCM and expanded graphite (EG) as the additive, a composite was developed with an optimal mass ratio of CW:EG = 10:1. The thermal and physical properties and the interior structure of the composite were then investigated using a scanning electron microscope (SEM), thermal constants analyser (Hot Disk), differential scanning calorimeter (DSC), and Fourier transform infrared spectrometer (FT-IR). Furthermore, experiments on the melting and solidification processes and accelerated thermal cycling were also conducted. It was found that at the optimal mass ratio of 10:1, the temperatures of the CW/EG composite in the melting and solidification processes were 81.98 °C and 80.43 °C, respectively, while the corresponding latent heats were 150.9 J/g and 142.6 J/g, respectively

  10. Vapor Pressure Measurements of LiBH4, NaBH 4 and Ca(BH4)2 using Knudsen Torsion Effusion Gravimetric Method

    Science.gov (United States)

    Danyan, Mohammad Masoumi

    .7 +/-177)/ T+ (2.57 +/-0.155). The enthalpy and entropy of vaporization, DeltaH evap.= 29.9+/-3.3kJ/molH2, DeltaSevap.=49.14 +/-2.9 J/molH2.K (400-650K) respectively. More details of the properties of the vaporization such partial pressures of effusing gases, Gibbs energies of vaporization, molecular weight of effusing gases, as well as decomposition products, evaporation reactions, thermodynamic modeling of the disproportionation of these three compounds are discussed in this dissertation.

  11. Heat capacity measurements and XPS studies on uranium-lanthanum mixed oxides

    International Nuclear Information System (INIS)

    Venkata Krishnan, R.; Mittal, V.K.; Babu, R.; Senapati, Abhiram; Bera, Santanu; Nagarajan, K.

    2011-01-01

    Research highlights: → Heat capacity measurements were carried out on (U 1-y La y )O 2±x (y = 0.2, 0.4, 0.6, and 0.8) using differential scanning calorimeter (DSC) in the temperature range 298-800 K. → Enthalpy increment measurements were carried out on the above solid solution using high temperature drop calorimetry in the temperature range 800-1800 K. → Chemical states of U and La in the solid solutions of mixed oxides were determined using X-ray photoelectron spectroscopy (XPS). → The anomalous increase in the heat capacity is attributed to certain thermal excitation process namely Frenkel pair defect of oxygen. → From the XPS investigation, it is observed that the O/M ratio at the surface is higher than that to the bulk. → In uranium rich mixed oxide samples, the surface O/M is greater than 2 whereas that in La rich mixed oxides, it is less than 2, though the bulk O/M in all the samples are less than 2. - Abstract: Heat capacity measurements were carried out on (U 1-y La y )O 2±x (y = 0.2, 0.4, 0.6, and 0.8) using differential scanning calorimeter (DSC) in the temperature range 298-800 K. Enthalpy increment measurements were carried out on the above solid solutions using high temperature drop calorimetry in the temperature range 800-1800 K. Chemical states of U and La in the solid solutions of mixed oxides were determined using X-ray photoelectron spectroscopy (XPS). Oxygen to metal ratios of (U 1-y La y )O 2±x were estimated from the ratios of different chemical states of U present in the sample. Anomalous increase in the heat capacity is observed for (U 1-y La y )O 2±x (y = 0.4, 0.6 and 0.8) with onset temperatures in the range of 1000-1200 K. The anomalous increase in the heat capacity is attributed to certain thermal excitation process, namely, Frenkel pair defect of oxygen. The heat capacity value of (U 1-y La y )O 2±x (y = 0.2, 0.4, 0.6, and 0.8) at 298 K are 65.3, 64.1, 57.7, 51.9 J K -1 mol -1 , respectively. From the XPS investigations

  12. A multilayer approach for turbidity currents

    Science.gov (United States)

    Fernandez-Nieto, Enrique; Castro Díaz, Manuel J.; Morales de Luna, Tomás

    2017-04-01

    analysis. Journal of Hydraulic Engineering, 125(10):1006-1015, (1999). [4] F. H. Chu, W. D. Pilkey, and O. H. Pilkey. An analytical study of turbidity current steady flow. Marine Geology, 33(3-4):205-220, 1979. [5] E. D. Fernández-Nieto, E. H. Koné, and T. C. Rebollo. A Multilayer Method for the Hydrostatic Navier-Stokes Equations: A Particular Weak Solution. J. of Scientific Computing, 60(2):408-437, (2013). [6] E. D. Fernández-Nieto, E. H. Koné, T. Morales de Luna, and R. Bürger. A multilayer shallow water system for polydisperse sedimentation. J. of Computational Physics, 238:281-314, (2013). [7] T. Mulder and J. P. M. Syvitski. Turbidity Currents Generated at River Mouths during Exceptional Discharges to the World Oceans. The Journal of Geology, 103(3):285-299, (1995). [8] G. Parker, Y. Fukushima, and H. M. Pantin. Self-accelerating turbidity currents. Journal of Fluid Mechanics, 171:145-181, (1986). [9] J. D. Parsons, J. W. M. Bush, and J. P. M. Syvitski. Hyperpycnal plume formation from riverine outflows with small sediment concentrations. Sedimentology, 48(2):465-478, (2001).

  13. Large Meteoroid Impact on the Moon on 17 March 2013

    Science.gov (United States)

    Moser, Danielle E.; Suggs, Robert M.; Suggs, Ronnie J.

    2014-01-01

    , the impactor kinetic energy was 5.4 × 10(exp 9) J and the impactor mass was 16 kg. Assuming an impact angle of 56deg from horizontal (based on fireball orbit measurements), a regolith density of 1500 kg/m(exp 3), and impactor density between 1800 and 3000 kg/m(exp 3), the impact crater diameter was estimated to be 8-18 m at the pre-impact surface and 10-23 m rim-to-rim using the Holsapple [6] and Gault [7] models, a result consistent with the observed crater.

  14. Kinetics of the R + HBr {r_reversible} RH + Br (CH{sub 3}CHBr, CHBr{sub 2} or CDBr{sub 2}) equilibrium. Thermochemistry of the CH{sub 3}CHBr and CHBr{sub 2} radicals

    Energy Technology Data Exchange (ETDEWEB)

    Seetula, Jorma A. [Laboratory of Physical Chemistry, P.O. Box 55 (A.I. Virtasen aukio 1), FIN-00014 University of Helsinki, Helsinki (Finland)], E-mail: j.seetula@kolumbus.fi; Eskola, Arkke J. [Laboratory of Physical Chemistry, P.O. Box 55 (A.I. Virtasen aukio 1), FIN-00014 University of Helsinki, Helsinki (Finland)

    2008-07-03

    The kinetics of the reaction of the CH{sub 3}CHBr, CHBr{sub 2} or CDBr{sub 2} radicals, R, with HBr have been investigated in a temperature-controlled tubular reactor coupled to a photoionization mass spectrometer. The CH{sub 3}CHBr (or CHBr{sub 2} or CDBr{sub 2}) radical was produced homogeneously in the reactor by a pulsed 248 nm exciplex laser photolysis of CH{sub 3}CHBr{sub 2} (or CHBr{sub 3} or CDBr{sub 3}). The decay of R was monitored as a function of HBr concentration under pseudo-first-order conditions to determine the rate constants as a function of temperature. The reactions were studied separately from 253 to 344 K (CH{sub 3}CHBr + HBr) and from 288 to 477 K (CHBr{sub 2} + HBr) and in these temperature ranges the rate constants determined were fitted to an Arrhenius expression (error limits stated are 1{sigma} + Student's t values, units in cm{sup 3} molecule{sup -1} s{sup -1}, no error limits for the third reaction): k(CH{sub 3}CHBr + HBr) = (1.7 {+-} 1.2) x 10{sup -13} exp[+ (5.1 {+-} 1.9) kJ mol{sup -1}/RT], k(CHBr{sub 2} + HBr) = (2.5 {+-} 1.2) x 10{sup -13} exp[-(4.04 {+-} 1.14) kJ mol{sup -1}/RT] and k(CDBr{sub 2} + HBr) = 1.6 x 10{sup -13} exp(-2.1 kJ mol{sup -1}/RT). The energy barriers of the reverse reactions were taken from the literature. The enthalpy of formation values of the CH{sub 3}CHBr and CHBr{sub 2} radicals and an experimental entropy value at 298 K for the CH{sub 3}CHBr radical were obtained using a second-law method. The result for the entropy value for the CH{sub 3}CHBr radical is 305 {+-} 9 J K{sup -1} mol{sup -1}. The results for the enthalpy of formation values at 298 K are (in kJ mol{sup -1}): 133.4 {+-} 3.4 (CH{sub 3}CHBr) and 199.1 {+-} 2.7 (CHBr{sub 2}), and for {alpha}-C-H bond dissociation energies of analogous compounds are (in kJ mol{sup -1}): 415.0 {+-} 2.7 (CH{sub 3}CH{sub 2}Br) and 412.6 {+-} 2.7 (CH{sub 2}Br{sub 2}), respectively.

  15. Set-up and calibration of an indoor nozzle-type rainfall simulator for soil erosion studies

    Science.gov (United States)

    Lassu, T.; Seeger, M.

    2012-04-01

    flow rates (4,5 l/min and 5,5 l/min), resulting in different rainfall intensities and made 2 repetitions each. The average rainfall intensity was 36,8 mm/h at the first and 37,6 mm/h at the second repetition with the lower flow rate (4,5 l/min). With the higher flow rate (5,5 l/min) at the first repetition it was 44,4 mm/h and 46 mm/h at the second one. The maximum and minimum values were 22 mm and 2 mm at the lower (4,5 l/min) flow rate, respectively 26 mm and 4 mm at the higher one (5,5 l/min). In this latter case, the resulting average kinetic energy reached 7 J m-2 mm-1, with a maximum 31,3 J m-2 mm-1 of and a minimum of 2,9 J m-2 mm-1. The Christiansen Uniformity coefficient (CU) for the lower intensities was 66% and 69%, respectively, with the higher intensities slightly better (70% and 72%). The data of the rainfall simulator in Wageningen make it a promising tool for research in soil erosion processes.

  16. The Protective Effect of Kevlar ® Socks Against Hockey Skate Blade Injuries: A Biomechanical Study

    Science.gov (United States)

    Nauth, Aaron; Aziz, Mina; Tsuji, Matthew; Whelan, Daniel B.; Theodoropoulos, John S.; Zdero, Rad

    2014-01-01

    simulate a typical ice hockey injury. Peak force, energy and power were calculated from the force-displacement data collected from the 7 matched pair trials. The cadavers were then dissected to identify the extent of the injury the skin and Achilles tendon from blade impact. Analysis of variance was used to test for a significant difference between the groups. Results: None (0/7) of the achilles tendons were lacerated when protected with Kevlar® reinforced socks; whereas all (7/7) achilles tendons tested using the standard synthetic sock were completely severed (Figure 1). Peak force (4030 +/- 1191 N vs. 2037 +/- 729 N), energy (81.4 +/- 38.9 J vs. 26.3 +/- 13.2 J) and power (471.2 +/- 166.7 W vs. 258.3 +/- 93.5 W) were all significantly (pKevlar® reinforced sock group compared to the standard synthetic sock group in our testing model (Figures 2 and 3). Conclusion: The Kevlar® reinforced socks provided significantly more cut resistance and were able to withstand a significantly larger peak force, energy and power from skate blade impact and prevent achilles tendon laceration when compared to standard synthetic hockey socks in a biomechanical testing model using human cadaver limbs. This is the first investigation to address the benefits of wearing Kevlar® reinforced hockey socks in a simulated model of hockey skate injuries and our results suggest a significant protective effect from the use of Kevlar® reinforced socks against hockey skate injuries.

  17. Development of an indoor air quality checklist for risk assessment of indoor air pollutants by semiquantitative score in nonindustrial workplaces

    Directory of Open Access Journals (Sweden)

    Syazwan AI

    2012-04-01

    Full Text Available AI Syazwan1, B Mohd Rafee1, Juahir Hafizan2, AZF Azman1, AM Nizar3, Z Izwyn4, AA Muhaimin5, MA Syafiq Yunos6, AR Anita1, J Muhamad Hanafiah1, MS Shaharuddin1, A Mohd Ibthisham7, Mohd Hasmadi Ismail8, MN Mohamad Azhar1, HS Azizan1, I Zulfadhli9, J Othman101Department of Community Health, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Selangor, Malaysia; 2Department of Environmental Science, Faculty of Environmental Studies, Universiti Putra Malaysia, Selangor, Malaysia; 3Pharmacology Unit, Department of Human Anatomy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Selangor, Malaysia; 4Department of Therapy and Rehabilitation, Faculty of Health Science and Biomedical Engineering, Universiti Teknologi Malaysia, Johor, Malaysia; 5Department of Environmental Management, Faculty of Environmental Studies, Universiti Putra Malaysia, Selangor, Malaysia; 6Plant Assessment Technology (PAT, Industrial Technology Division (BTI, Malaysian Nuclear Agency (Nuklear Malaysia, Bangi, Kajang, Malaysia; 7Department of Mechanical Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, UTM Skudai, Johor, Malaysia; 8Department of Forest Production, Faculty of Forestry, Universiti Putra Malaysia, Selangor, Malaysia; 9Faculty of Built Environment and Architect, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia; 10Department of Counsellor Education and Counselling Psychology (DCECP, Faculty of Educational Studies, Universiti Putra Malaysia, Selangor, MalaysiaBackground: To meet the current diversified health needs in workplaces, especially in nonindustrial workplaces in developing countries, an indoor air quality (IAQ component of a participatory occupational safety and health survey should be included.Objectives: The purpose of this study was to evaluate and suggest a multidisciplinary, integrated IAQ checklist for evaluating the health risk of building occupants. This IAQ checklist proposed to support

  18. Effect of controlled laser microporation on drug transport kinetics into and across the skin.

    Science.gov (United States)

    Bachhav, Y G; Summer, S; Heinrich, A; Bragagna, T; Böhler, C; Kalia, Y N

    2010-08-17

    The objectives of this study were to investigate a novel laser microporation technology ( P.L.E.A.S.E. Painless Laser Epidermal System) and to determine the effect of pore number and depth on the rate and extent of drug delivery across the skin. In addition, the micropores were visualized by confocal laser scanning microscopy and histological studies were used to determine the effect of laser fluence (energy applied per unit area) on pore depth. Porcine ear skin was used as the membrane for both the pore characterization and drug transport studies. Confocal images in the XY-plane revealed that the pores were typically 150-200 microm in diameter. Histological sections confirmed that fluence could be used to effectively control pore depth - low energy application (4.53 and 13.59 J/cm(2)) resulted in selective removal of the stratum corneum (20-30 microm), intermediate energies (e.g., 22.65 J/cm(2)) produced pores that penetrated the viable epidermis (60-100 microm) and higher application energies created pores that reached the dermis (>150-200 microm). The effects of pore number and pore depth on molecular transport were quantified by comparing lidocaine delivery kinetics across intact and porated skin samples. After 24h, cumulative skin permeation of lidocaine with 0 (control), 150, 300, 450 and 900 pores was 107+/-46, 774+/-110, 1400+/-344, 1653+/-437 and 1811+/-642 microg/cm(2), respectively; there was no statistically significant difference between 300, 450 and 900 pore data - probably due to the effect of drug depletion since >50% of the applied dose was delivered. Importantly, increasing fluence did not produce a statistically significant increase in lidocaine permeation; after 24h, cumulative lidocaine permeation was 1180+/-448, 1350+/-445, 1240+/-483 and 1653+/-436 microg/cm(2) at fluences of 22.65, 45.3, 90.6 and 135.9 J/cm(2), respectively. Thus, shallow pores were equally effective in delivering lidocaine. Increasing lidocaine concentration in the

  19. Action of Mercaptan and Disulfide in Hydrogen Atom Exchange Reactions; Action des Thioalcools et des Disulfures dans les Reactions d'Echange d'Atomes d'Hydrogene; Vozdejstvie merkaptanov i disul'fidov v reaktsiyakh obmena atoma vodoroda; Accion de los Mercaptanos y Disulfuros en las Reacciones de Intercambio del Hidrogeno Atomico

    Energy Technology Data Exchange (ETDEWEB)

    Cohen, S. G. [Brandeis University Waltham, MA (United States)

    1965-10-15

    radikalami, a takzhe fotohimicheskie i navedennye radiaciej bol'shoj jenergii reakcii mogut byt' katalizirovany ili zatormozheny bystrymi reakcijami obmena atoma vodoroda merkaptanov i disul'fidov. Navedennye pod vlijaniem sveta radikaly i senzitivirovannye benzofenonom reakcii dekarbonizacii aldegidov katalizirujutsja merkaptanami. Cepnaja reakcija posledovatel'nogo perenosa vodoroda R' + RCH = O -> RH + RC = O uskorjaetsja analogichnoj posledovatel'nost'ju perenosov atoma vodoroda s uchastiem slozhnyh soedinenij sery: R' + C{sub 6}H{sub 5}CH{sub 2}SH -> RH + C{sub 6}H{sub 5}CH{sub 2}S'; C{sub 6}H{sub 5}CH{sub 2}S + RCH = 0 -> C{sub 6}H{sub 5}CH{sub 2}SH + RC = 0. Fotovosstanovlenie benzofenona v 2-propanole vedet k obrazovaniju benzpinakola cherez necepnuju reakciju posredstvom radikalov (C{sub 6}H{sub 5}){sub 2}C-OH and (CH{sub 3}){sub 2}COH. Jeta reakcija zamedljaetsja i tormozitsja merkaptanom i disul'fidom, kotorye vnov' prevrashhajut radikaly v ishodnye materialy bystrymi reakcijami perenosa vodoroda, a sami reagenty regenerirujutsja v svoi sostojanija drugoj valentnosti, prichem kazhdaja molekula slozhnogo soedinenija sery prohodit bez himicheskih posledstvij cherez mnogie kvanty: (C{sub 6}H{sub 5}){sub 2}C-OH + AS' -> (C{sub 6}H{sub 5}){sub 2}C = O + ASH; (CH{sub 3}){sub 2}C-OH + ASH -> (CH{sub 3}){sub 2}C = 0 + AS'. Dokazatel'stvami takogo mehanizma mogut sluzhit': privedenie v sostojanie ravnovesija pervonachal'no prisutstvovavshego merkaptana ili disul'fida vo vremja tormozhenija; grozdevanie opticheski aktivnogo spirta vo vremja tormozhenija; obmen dejterija vo vremja tormozhenija. Analogichnoe tormozhenie nabljudaetsja pri obrazovanii odnogo tol'ko promezhutochnogo radikala, kak jeto proishodit v spirtovyh sostavah benzofenona - benzgidrola i acetofenona - {alpha} - metilbenzila. Tormozhenie slozhnymi soedinenijami sery putem takogo zhe mehanizma nabljudaetsja v navedennom gamma-luchami kobal'ta-60 prevrashhenii benzofenona v benzpinakol; naftalin ne proizvodit

  20. Psychische Belastungen durch die Dissektion am Leichnam im anatomischen Präparierkurs bei Erstsemestern des Studienfachs Medizin [Psychological Stress In First Year Medical Students In Response To The Dissection Of A Human Corpse

    Directory of Open Access Journals (Sweden)

    Bernhardt, Veronika

    2012-02-01

    were very worried about the confrontation with corpses. Furthermore, personality tests were shown to be only partly reliable for selecting affected people in advance. With regard to these results capabilities to provide support to the first year medical students should be discussed.[german] Ziel der Studie: Das Fachgebiet der Anatomie ist eines der wichtigsten und lernintensivsten Fächer im vorklinischen Studienabschnitt eines Medizinstudierenden. An der Otto-von-Guericke-Universität in Magdeburg stellten sich im Oktober 2007 186 Studierende, davon 126 weiblich und 60 männlich, der Begegnung mit der anatomischen Dissektion von Verstorbenen. Das Ziel dieser Studie ist es, herauszufinden welche Rolle der emotionale Aspekt im Bezug auf diesen Kurs spielt. Es wurde untersucht, wie die Studierenden die erste Konfrontation und den weiteren Umgang mit den Präparaten von Verstorbenen subjektiv wahrnehmen und verarbeiten und inwieweit diesbezügliche Unterschiede zwischen verschiedenen Gruppen (Alter, Geschlecht, Vorerfahrung aufzufinden sind.Methoden: Die Studie wurde an 155 Erstsemestern durchgeführt (112 w, 43 m; 21,4±2,9 J.. Es wurden selbstkonstruierte Fragebögen benutzt, die schwerpunktmäßig Befürchtungen hinsichtlich des anatomischen Präparierkurses erfragen und mit Erfahrungen hinsichtlich des Sterbens und eigenen Ängsten vor dem Tod verglichen. Es wurde je ein Fragebogen zu Beginn des ersten Semesters und nach dem ersten Semester ausgehändigt (n=94, 66 w, 28 m, um Entwicklungen und Veränderungen erkennen zu können. Zur Erfassung der Persönlichkeitseigenschaften wurde außerdem zwei Skalen aus dem Freiburger Persönlichkeitsinventar (FPI-R vorgelegt. Ergebnisse: Der selbstentwickelte Fragebogen zeigte hohe Reliabilität. Der Präparierkurs stellte für einige Studierende eine subjektive psychische Belastung dar; rund 50% hatten sich Sorgen gemacht, wie sie die erste Begegnung vertragen, allerdings nur 12% in einem wirklich schweren Ausmaß. Die

  1. Thermodynamic investigation of fluoride salts for nuclear energy production

    International Nuclear Information System (INIS)

    Beilmann, Markus

    2013-01-01

    chemical nature of the investigated system and to simplify the integration of the obtained data in an already existing database of fluoride salt phase diagrams at the Institute for Transuranium Elements in Karlsruhe, Germany. In the Molten salt reactor technology UF 3 has a big influence on the corrosion properties of the used salt mixture. But only limited phase diagram data exist regarding this compound. Therefore, the LiF-UF 3 and NaF-UF 3 system was measured with the DSC method and the LiF-NaF-UF 3 -UF 4 quaternary system was mathematically assessed. The assessment was complicated by a disproportionation of UF 3 during the measurements which is faster in the NaF-UF 3 system due to the fluoroacidity difference of LiF and NaF. A key system for various designs of the Molten Salt Reactor is LiF-ThF 4 binary system. The phase diagram of that system was reassessed based on various newly measured data in this study. In this context also a modication to the used DSC measurement technique was done in order to be able to measure enthalpies of mixing of the two components LiF and ThF 4 . This method was developed during this work and was verified by the measurement of the LiF-KF system where experimental data exist. A very good agreement between the measured data and the literature was obtained. Also an intermediate solid compound of the LiF-ThF 4 system, namely Li 3 ThF 7 , was synthesized and the enthalpy of fusion was determined. All new experimental results were considered in the reassessment of the phase diagram. As consequence the assumption of the liquid heat capacity of ThF 4 was corrected from 133.9 J . K -1 . mol -1 to 170 J . K -1 . mol -1 . With the obtained results and several new phase diagram descriptions it was investigated, if CaF 2 is a beneficial component to be used in the salt mixture of two different molten salt reactor designs. It is concluded that CaF 2 has no profitable influence on the LiF-NaF-BeF 2 -PuF 3 salt mixture in a specific transuranium burner

  2. LISA Pathfinder author list

    International Nuclear Information System (INIS)

    2017-01-01

    M Armano, 1 H Audley, 2 G Auger, 3 J Baird, 4 M Bassan, 5 P Binetruy, 3 M Born, 2 D Bortoluzzi, 6 N Brandt, 7 M Caleno, 8 A Cavalleri, 9 A Cesarini, 9 M Cruise, 10 K Danzmann, 2 M de Deus Silva, 1 R De Rosa, 11 L Di Fiore, 12 I Diepholz, 2 R Dolesi, 9 N Dunbar, 13 L Ferraioli, 14 V Ferroni, 9 E Fitzsimons, 15 R Flatscher, 7 M Freschi, 1 C García Marrirodriga, 8 R Gerndt, 7 L Gesa, 16 F Gibert, 9 D Giardini, 14 R Giusteri, 9 A Grado, 11 C Grimani, 17 J Grzymisch, 8 I Harrison, 18 G Heinzel, 2 M Hewitson, 2 D Hollington, 4 D Hoyland, 10 M Hueller, 9 H Inchauspé, 3 O Jennrich, 8 P Jetzer, 19 B Johlander, 8 N Karnesis, 2 B Kaune, 2 N Korsakova, 2 C Killow, 20 A Lobo, 16 , I Lloro, 16 L Liu, 9 J.P. López-Zaragoza, 16 R Maarschalkerweerd, 18 D Mance, 14 V Martín, 16 L Martin-Polo, 1 J Martino, 3 F Martin-Porqueras, 1 S Madden, 8 I Mateos, 16 P W McNamara, 8 J Mendes, 18 L Mendes, 1 M Nofrarias, 16 S Paczkowski, 2 M Perreur-Lloyd, 20 A Petiteau, 3 P Pivato, 9 E Plagnol, 3 P Prat, 3 U Ragnit, 8 J Ramos-Castro, 21 J Reiche, 2 D I Robertson, 20 H Rozemeijer, 8 F Rivas, 16 G Russano, 9 P Sarra, 22 A Schleicher, 7 D Shaul, 4 J Slutsky, 23 C F Sopuerta, 16 R Stanga, 24 T Sumner, 4 D Texier, 1 J I Thorpe, 23 C Trenkel, 13 M Troebs, 2 D Vetrugno, 9 S Vitale, 9 G Wanner, 2 H Ward, 20 P Wass, 4 D Wealthy, 13 W J Weber, 9 L Wissel, 2 A Wittchen, 2 A Zambotti, 6 C Zanoni, 6 T Ziegler, 7 and P Zweifel 14 1 European Space Astronomy Centre, European Space Agency, Villanueva de la Cañada, 28692 Madrid, Spain 2 Albert-Einstein-Institut, Max-Planck-Institut für Gravitationsphysik und Universität Hannover, Callinstrasse 38, 30167 Hannover, Germany 3 APC, Univ Paris Diderot, CNRS/IN2P3, CEA/lrfu, Obs de Paris, Sorbonne Paris Cité, France 4 High Energy Physics Group, Physics Department, Imperial College London, Blackett Laboratory, Prince Consort Road, London, SW7 2BW, UK 5 Dipartimento di Fisica, Università di Roma “Tor Vergata”, and INFN, sezione Roma Tor Vergata, I-00133 Roma

  3. Hydrogen storage on carbon materials: state of the art

    International Nuclear Information System (INIS)

    D Cazorla Amoros; D Lozano Castello; F Suarez Garcia; M Jorda Beneytoa; A Linares Solano

    2005-01-01

    Strobel et al. (15]. References: 1)S. Hynek et al, Int.J.Hyd.EnM 1997, 22, 601. 2)A. Chambers et al. J. Phys. Chem. B. 1998, 22, 4253. 3)G.G. Tibbetts, et al. Carbon, 2001, 39, 2291. 4)D. Lozano-Castello, et al. Fuel, 2002, 81, 1777. 5)L. Zhou, Y. et al. Inter. J. Hydrogen Energy, 2004, 29, 475. 6)M. Rzepka, Pet al. J. Phys. Chem. B. 1998,102, 10894. 7)M.G. Nijkamp, et al. Appl. Phys. A, 2001, 72, 619. 8)D.Quinn. British Carbon Group Workshop. Carbon Adsorbents: Porosity, surface chemistry and use, Aberdeen, 2002. 9)J.B. Pana, et al. J. Alloys Compounds, 2004, 379, 280. 10)N. Texier-Mandoki, et al. Carbon, 2004, 42, 2735. 11)E. Terres, et al. Chem. Phys. Letter., 2005, 403, 363. 12)L. Zhan, et al. Carbon, 2002, 40, 445. 13)H. Takae et al. Mater. Science Engineering B, 2004,108, 143. 14)M.A. de la Casa-Lillo, et al. J. Phys. Chem. B. 2002,106, 10930. 15)R. Strobel, et al. J. Power Sources, 1999, 84, 221. 16)H. Kajiura, et al. Appl. Phys. Letter. 2003, 82, 1105

  4. Hydrogen storage on carbon materials: state of the art

    International Nuclear Information System (INIS)

    Cazorla-Amoros, D.; Lozano-Castello, D.; Suarez-Garcia, F.; Jorda-Beneyto, M.; Linares-Solano, A.

    2005-01-01

    et al. [15]. [1] S. Hynek et al, Int.J.Hyd.EnERG 1997, 22, 601. [2] A. Chambers et al. J. Phys. Chem. B. 1998, 22, 4253. [3] G.G. Tibbetts, et al. Carbon, 2001, 39, 2291. D. Lozano-Castello, et al. Fuel, 2002, 81, 1777. [5] L. Zhou, Y. et al. Inter. J. Hydrogen Energy, 2004, 29, 475. [6] M. Rzepka, Pet al. J. Phys. Chem. B. 1998,102, 10894. [7] M.G. Nijkamp, et al. Appl. Phys. A, 2001, 72, 619. [8] D.Quinn. British Carbon Group Workshop. Carbon Adsorbents: Porosity, surface chemistry and use, Aberdeen, 2002. [9] J.B. Parra, et al. J. Alloys Compounds, 2004, 379, 280. [10] N. Texier-Mandoki, et al. Carbon, 2004, 42, 2735. [11] E. Terres, et al. Chem. Phys. Letter., 2005, 403, 363. [12] L. Zhan, et al. Carbon, 2002, 40, 445. [13] H. Takagi et al. Mater. Science Engineering B, 2004,108, 143. [14] M.A. de la Casa-Lillo, et al. J. Phys. Chem. B. 2002,106, 10930. [15] R. Strobel, et al. J. Power Sources, 1999, 84, 221. [16] H. Kajiura, et al. Appl. Phys. Letter. 2003, 82, 1105. (authors)

  5. Time-scale calibration by U-Pb geochronology: Examples from the Triassic Period

    Science.gov (United States)

    Mundil, R.

    2009-05-01

    )) and the Early-Middle Triassic (Olenekian-Anisian) boundary (247.2 Ma, (8, 9)), resulting in a surprisingly short duration of the Early Triassic which has implications for the timing of biotic recovery and major changes in ocean chemistry during this time. Furthermore, the Anisian-Ladinian boundary is constrained to 242.0 Ma by new U-Pb and 40Ar/39Ar ages. Radio-isotopic ages for the Late Triassic are scarce and the only reliable and biostratigraphically controlled age is from an upper Carnian tuff dated to 230.9 Ma (10), yielding a duration of more than 35 Ma for the Late Triassic. The resulting time-scale is at odds with the most recent compilation (11) but arguably more accurate because it is entirely based on U-Pb analyses applied to closed-system zircons with uncertainties at the permil level or better. 1. T. E. Krogh, Geochimica et Cosmochimica Acta 37, 485 (1973); 2. T. E. Krogh, Geochimica et Cosmochimica Acta 46, 637 (1982); 3. J. M. Mattinson, Chemical Geology 220, 47 (2005); 4. R. Mundil, K. R. Ludwig, I. Metcalfe, P. R. Renne, Science 305, 1760 (2004); 5. U. Schaltegger, J. Guex, A. Bartolini, B. Schoene, M. Ovtcharova, Earth and Planetary Science Letters 267, 266 (2008); 6. R. Mundil, P. R. Renne, K. K. Min, K. R. Ludwig, in Eos Trans. AGU, Fall Meet. Suppl. (2006), vol. 87(52), pp. V21A-0543; 7. T. Galfetti et al., Earth and Planetary Science Letters 258, 593 (2007). 8. M. Ovtcharova et al., Earth and Planetary Science Letters 243, 463 (2006). 9. J. Ramezani et al., Earth and Planetary Science Letters 256, 244 (2007). 10. S. Furin et al., Geology 34, 1009 (2006); 11. J. G. Ogg, in A Geologic Time Scale 2004 F. M. Gradstein, J. G. Ogg, A. G. Smith, Eds. (University Press, Cambridge, 2004) pp. 271-306.

  6. Investigation of small scale roughness properties of Martian terrains using Mars Reconnaissance Orbiter data.

    Science.gov (United States)

    Ivanov, A. B.; Rossi, A.

    2009-04-01

    . 2003. [5] A. B. Ivanov and J. J. Lorre. Analysis of Mars Orbiter Camera Stereo Pairs. In Lunar and Planetary Institute Conference Abstracts, volume 33 of Lunar and Planetary Inst. Technical Report, pages 1845-+, Mar. 2002. [6] R. Jaumann, et al. The high-resolution stereo camera (HRSC) experiment on mars express: Instrument aspects and experiment conduct from interplanetary cruise through the nominal mission. Planetary and Space Science, 55(7-8):928-952, MAY 2007. [7] R. L. Kirk, et al. Ultrahigh resolution topographic mapping of mars with MRO HIRISE stereo images: Meter-scale slopes of candidate phoenix landing sites. Journal of Geophysical Research-Planets, 113, NOV 15 2008. [8] S. Lavoie, et al. Processing and analysis of mars pathfinder science data at the jet propulsion laboratory's science data processing systems section. Journal of Geophysical Research-Planets, 104(E4):8831-8852, APR 25 1999. [9] J. J. Lorre, et al. Recent developments at JPL in the application of image processing to astronomy. In D. L. Crawford, editor, Instrumentation in Astronomy III, volume 172 of Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, pages 394-402, 1979. [10] M. Malin, et al. Early views of the martian surface from the mars orbiter camera of mars global surveyor. Science, 279(5357):1681-1685, MAR 13 1998. [11] M. C. Malin,et al. Context camera investigation on board the mars reconnaissance orbiter. Journal of Geophysical Research-Planets, 112(E5), MAY 18 2007. [12] A. S. McEwen, et al.. Mars reconnaissance orbiter's high resolution imaging science experiment (HIRISE). Journal of Geophysical Research-Planets, 112(E5), MAY 17 2007. [13] A. Rossi, et al. Multi-spacecraft synergy with MEX HRSC and MRO SHARAD: Light-Toned Deposits in crater bulges. AGU Fall Meeting Abstracts, pages B1371+, Dec. 2008. [14] A. P. Rossi, et al. Stratigraphic architecture and structural control on sediment emplacement in Becquerel crater (Mars). volume 40. Lunar and Planetary

  7. Determinantes de risco para doenças cardiovasculares em escolares Determinants of risk of cardiovascular diseases in schoolchildren

    Directory of Open Access Journals (Sweden)

    Estelamaris T. Monego

    2006-07-01

    Full Text Available OBJETIVO: Conhecer a ocorrência e associação de hipertensão arterial com algumas variáveis relacionadas ao estilo de vida. MÉTODOS: Estudo transversal, base populacional, amostra aleatória em indivíduos (7 a 14 anos de escolas (rede pública e particular. Investigados o estado nutricional, pressão arterial e hábitos de vida (tabaco, álcool, atividade física e hábito alimentar. RESULTADOS: Dos 3.169 escolares avaliados, destacaram-se 5,0% de hipertensão arterial e 6,2% de pressão normal-alta. A categorização por sexo mostra 6,4% meninos e 6,0% meninas com pressão normal-alta e 4,3% meninos e 5,7% meninas com hipertensão arterial. O índice de massa corporal (IMC identificou 16,0% com excesso de peso, dos quais 4,9% já obesos. Houve associação significante (p = 0,01 entre hipertensão arterial e excesso de peso. Dentre os investigados, 11,6% não faziam aulas de educação física e 37,8% eram sedentários no lazer. O tabagismo foi informado por vinte 0,6% escolares, e a experimentação de bebida alcoólica por 32,7%. Nenhuma dessas variáveis apresentou significância estatística em relação aos valores pressóricos e estado nutricional. CONCLUSÃO: Diante do encontro de escolares com valores médios de pressão arterial e IMC com freqüência acima da esperada, associado a hábitos de vida que tendem a favorecer o desenvolvimento das doenças cardiovasculares, sugere-se a proposição de medidas de intervenção cujo foco seja o escolar, como elemento capaz de disseminar as informações no núcleo familiar. Essa possibilidade nos mobiliza para uma proposta de atuação nas escolas como parceiras na promoção da saúde.OBJECTIVE: To investigate the occurrence and association of arterial hypertension with several lifestyle variables. METHODS: Transversal population-based study with a random sample of students (7 to 14 years of age of public and private schools. Variables investigated were nutritional status, blood

  8. Controlled intra- and transdermal protein delivery using a minimally invasive Erbium:YAG fractional laser ablation technology.

    Science.gov (United States)

    Bachhav, Y G; Heinrich, A; Kalia, Y N

    2013-06-01

    significant effect on the cumulative permeation of both Cyt c (at 100, 150, 300 and 600 pores/cm(2), permeation was 11.2±2.4, 15.3±11.8, 33.8±10.5 and 51.2±15.8 4 μg/cm(2), respectively) and FITC-BSA (at 50, 100, 150 and 300 pores/cm(2), it was 58.5±15.3, 132.6±40.0, 192.7±24.4, 293.3±76.5 μg/cm(2), respectively). Linear relationships were established in both cases. However, only the delivery of FITC-BSA was improved upon increasing fluence (53.3±22.5, 293.3±76.5, 329.6±11.5 and 222.1±29.4 μg/cm(2) at 22.65, 45.3, 90.6 and 135.9 J/cm(2), respectively). The impact of fluence - and hence pore depth - on transport will depend on the relative diffusivities of the protein in the micropore and in the 'bulk' epidermis/dermis. Experiments with Cyt c and FSH confirmed that delivery was dependent upon concentration, and it was shown that therapeutic delivery of the latter was feasible. Cumulative permeation of Cyt c and FITC-BSA was also shown to be statistically equivalent across porcine and human skin. In conclusion, it was demonstrated that laser microporation enabled protein delivery into and across the skin and that this could be modulated via the poration parameters and was also dependent upon the concentration gradient in the pore. However, the role of protein physicochemical properties and their influence on transport rates remains to be elucidated and will be explored in future studies. Copyright © 2012 Elsevier B.V. All rights reserved.

  9. Indicadores antropométricos como preditores de pressão arterial elevada em adolescentes Indicadores antropométricos como predictores de presión arterial elevada en adolescentes Anthropometric indicators as predictors of high blood pressure in adolescents

    Directory of Open Access Journals (Sweden)

    Carmem Cristina Beck

    2011-02-01

    étricos. OBJETIVO: Determinar el poder predictivo de indicadores antropométricos y establecer sus puntos de corte como discriminadores de presión arterial elevada. MÉTODOS: Estudio transversal realizado con una muestra de 660 adolescentes de 14 a 19 años siendo 51,9% jóvenes del sexo femenino. Se tuvieron en cuenta los siguientes indicadores antropométricos: índice de masa corporal (IMC, circunferencia de la cintura, razón cintura/estatura e índice de conicidad. La presión arterial elevada se caracterizó por valores superiores a un percentil 90 para presión arterial sistólica y/o presión arterial diastólica. Para identificación de los predictores de presión arterial elevada, se adoptó el análisis de las curvas Receiver Operating Characteristic (ROC, con intervalo de confianza del 95%. Posteriormente, se identificaron los puntos de corte con sus respectivas sensibilidades y especificidades. RESULTADOS: Las áreas bajo las curvas ROC con los intervalos de confianza fueron: Jóvenes del sexo masculino - circunferencia de cintura = 0,80 (0,72 - 0,89; IMC = 0,79 (0,68 - 0,89; razón cintura/estatura = 0,77 (0,66 - 0,88; índice de conicidad = 0,69 (0,56 - 0,81 y para las jóvenes del sexo femenino - circunferencia de la cintura = 0,96 (0,92 - 1,00; IMC = 0,95 (0,87 - 1,00; razón cintura/estatura = 0,93 (0,85 - 1,00; índice de conicidad = 0,74 (0,50 - 0,98. Se identificaron los diversos puntos de corte de los indicadores antropométricos con mejores poderes predictivos y sus respectivas sensibilidades y especificidades. CONCLUSIÓN: A pesar de la razón cintura/estatura y del IMC haber presentado buenas áreas bajo la curva ROC, se sugiere la utilización de la circunferencia de la cintura para la predicción de la presión arterial elevada.BACKGROUND: Hypertension is related to increased body fat, which can be evaluated by anthropometric indicators. OBJECTIVE: To determine the predictive power of anthropometric indicators and establish their cutoff points as

  10. A Study of the Recoil Reactions of Three Isotopes of Ruthenium in Ruthenocene; Etude des Reactions d'Atomes de Recul de Trois Isotopes du Ruthenium dans le Ruthenocen; 0418 0417 0423 0427 0415 041d 0418 0415 0420 0415 0410 041a 0426 0418 0419 041e 0422 0414 0410 0427 0418 0422 0420 0415 0425 0418 0417 041e 0422 041e 041f 041e 0412 0420 0423 0422 0415 041d 0418 042f 0412 0420 0423 0422 0415 041d 041e 0421 0415 041d 0415 ; Estudio de las Reacciones de Retroceso de Tres Isotopos del Rutenio en el Rutenoceno

    Energy Technology Data Exchange (ETDEWEB)

    Harbottle, G.; Zahn, U. [Brookhaven National Laboratory, Upton, NY (United States)

    1965-04-15

    -state of the different ruthenium isotopes following de-excitation of the compound nuclear state, must also be considered. Several alternative explanations of these results are discussed. (author) [French] Les auteurs ont etudie les reactions d'atomes de recul de trois isotopes de ruthenium dans le ruthenocene, compose moleculaire 'sandwich' [(C{sub 5}H{sub 5}){sub 2} Ru]. Les radioisotopes produits dans le reacteur par des reactions (n, {gamma}) etaient: {sup 97}Ru (2, 9 j) {sup 109}Ru (40 j) et {sup 105}Ru (4,45 h); leurs activites relatives ont ete determinees par analyse des spectres de scintillation au moyen d'un appareil multicanaux. Les auteurs ont bombarde des cristaux de ruthenocene a diverses temperatures et en divers emplacements; a la temperature ambiante, ils ont observe les retentions suivantes: {sup 97}Ru, 9.5{+-}0.1; {sup 103}Ru, 10.7 {+-} 0.2; et {sup 105}Ru , 9.9{+-}0.2%. A la suite d'un recuit des cristaux a 140 Degree-Sign C, la retention n'a augmente que legerement; toutefois, il s'est forme un autre compose organique volatil (inconnu), marque par le ruthenium, qui a pu etre separe du ruthenocene par sublimation repetee. Lorsque les auteurs ont pris pour cible une solution a 2% de ruthenocene dans du benzene, ils ont observe les retentions suivantes: 0.61{+-}0.03, 1.04{+-}0.02 and 0.98{+-}0.02%; ces valeurs n'ont pas sensiblement varie lorsqu'ils ont pris comme cible une solution dix fois plus diluee (concentration 0,2%). Pour determiner l'effet possible de la viscosite du milieu, les auteurs ont egalement fait des recherches sur des solutions a 2% de ruthenocene dans du benzene contenant 2, 10 et 20% de polystyrene. La encore, les resultats etaient tres analogues a ceux qu'ils avaient obtenus pour le benzene pur. Les auteurs ont aussi etudie des solutions benzeniques (2 et 0,2% de ruthenocene) solides a basse temperature; les valeurs de la retention se rapprochaient de celles des cristaux de ruthenocene a la meme temperature. Si l'on exprime l

  11. Fractional and fractal dynamics approach to anomalous diffusion in porous media: application to landslide behavior

    Science.gov (United States)

    Martelloni, Gianluca; Bagnoli, Franco

    2016-04-01

    , Springer, Berlin, 1967. [7] S.R. de Groot, P. Mazur, Non-equilibrium Thermodynamics, North-Holland, Amsterdam, 1969. [8] J.L. Doob, Stochastic Processes, Wiley, New York, 1953. [9] J. Crank, The Mathematics of Diffusion, Clarendon Press, Oxford, 1970. [10] D.R. Cox, H.D. Miller, The Theory of Stochastic Processes, Methuen, London, 1965. [11] R. Aris, The Mathematical Theory of Diffusion and Reaction in Permeable Catalysis, Vols. I and II, Clarendon Press, Oxford, 1975. [12] L.D. Landau, E.M. Lifschitz, Statistische Physik, Akademie, Leipzig, 1989; Statistical Physics, Pergamon, Oxford, 1980. [13] N.G. van Kampen, Stochastic Processes in Physics and Chemistry, North-Holland, Amsterdam, 1981. [14] H. Risken, The Fokker-Planck Equation, Springer, Berlin, 1989. [15] W.T. Coffey, Yu.P. Kalmykov, J.T. Waldron, The Langevin Equation, World Scientific, Singapore, 1996. [16] B.D. Hughes, Random Walks and Random Environments, Vol. 1: Random Walks, Oxford University Press, Oxford, 1995. [17] G.H. Weiss, R.J. Rubin, Adv. Chem. Phys. 52 (1983) 363. [18] A. Blumen, J. Klafter, G. Zumofen, in: I. Zschokke (Ed.), Optical Spectroscopy of Glasses, Reidel, Dordrecht, 1986. [19] G.M. Zaslavsky, S. Benkadda, Chaos, Kinetics and Nonlinear Dynamics in Fluids and Plasmas, Springer, Berlin, 1998. [20] R. Metzler, J. Klafter, The random walk's guide to anomalous diffusion: a fractional dynamics approach, Physics Reports 339 (2000) 1-77. [21] P. Levy, Calcul des Probabilites, Gauthier-Villars, Paris, 1925. [22] P. Levy, Theorie de l'addition des variables Aleatoires, Gauthier-Villars, Paris, 1954. [23] B.V. Gnedenko, A.N. Kolmogorov, Limit Distributions for Sums of Random Variables, Addison-Wesley, Reading, MA, 1954. [24] L.F. Richardson, Atmospheric diffusion shown on a distance-neighbour graph, Proc. R. Soc.Lond. A 110, 709-737, 1926. [25] H. Scher, E.W. Montroll, Phys. Rev. B 12 (1975) 2455. [26] J. P. Bouchaud, A. Georges, Anomalous diffusion in disordered media: Statistical mechanisms, models