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Sample records for monte dei corvi

  1. The upper Tortonian-lower Messinian at Monte dei Corvi (Northern Apennines, Italy) : Completing a Mediterranean reference section for the Tortonian Stage

    NARCIS (Netherlands)

    Hüsing, S. K.; Kuiper, K. F.; Link, W.; Hilgen, Frederik J.; Krijgsman, W.

    2009-01-01

    A high-resolution integrated stratigraphy including biostratigraphy, magnetostratigraphy, tephrostratigraphy and cyclostratigraphy is presented for the upper Tortonian and lower Messinian (Upper Miocene) at Monte dei Corvi. Numerical age control comes from a combination of magnetobiostratigrapic

  2. Probable late Messinian tsunamiites near Monte Dei Corvi, Italy, and the Nijar Basin, Spain: expected architecture of offshore tsunami deposits

    NARCIS (Netherlands)

    Smit, J.; Laffra, C.; Meulenaars, K.; Montanari, A.

    2011-01-01

    Three distinct, 30- to 80-cm-thick, graded, multilayered, coarse-grained sandstone layers, intercalated in the late Messinian mudstones of the Colombacci formation in Lago Mare facies of the Trave section are interpreted as tsunamiites (Ts1-Ts3). Each of these layers is sheet-like and could be

  3. Bulk rock composition and geochemistry of olivine-hosted melt inclusions in the Grey Porri Tuff and selected lavas of the Monte dei Porri volcano, Salina, Aeolian Islands, southern Italy

    Science.gov (United States)

    Doherty, Angela L.; Bodnar, Robert J.; De Vivo, Benedetto; Bohrson, Wendy A.; Belkin, Harvey E.; Messina, Antonia; Tracy, Robert J.

    2012-01-01

    The Aeolian Islands are an arcuate chain of submarine seamounts and volcanic islands, lying just north of Sicily in southern Italy. The second largest of the islands, Salina, exhibits a wide range of compositional variation in its erupted products, from basaltic lavas to rhyolitic pumice. The Monte dei Porri eruptions occurred between 60 ka and 30 ka, following a period of approximately 60,000 years of repose. The bulk rock composition of the Monte dei Porri products range from basaltic-andesite scoria to andesitic pumice in the Grey Porri Tuff (GPT), with the Monte dei Porri lavas having basaltic-andesite compositions. The typical mineral assemblage of the GPT is calcic plagioclase, clinopyroxene (augite), olivine (Fo72−84) and orthopyroxene (enstatite) ± amphibole and Ti-Fe oxides. The lava units show a similar mineral assemblage, but contain lower Fo olivines (Fo57−78). The lava units also contain numerous glomerocrysts, including an unusual variety that contains quartz, K-feldspar and mica. Melt inclusions (MI) are ubiquitous in all mineral phases from all units of the Monte dei Porri eruptions; however, only data from olivine-hosted MI in the GPT are reported here. Compositions of MI in the GPT are typically basaltic (average SiO2 of 49.8 wt %) in the pumices and basaltic-andesite (average SiO2 of 55.6 wt %) in the scoriae and show a bimodal distribution in most compositional discrimination plots. The compositions of most of the MI in the scoriae overlap with bulk rock compositions of the lavas. Petrological and geochemical evidence suggest that mixing of one or more magmas and/or crustal assimilation played a role in the evolution of the Monte dei Porri magmatic system, especially the GPT. Analyses of the more evolved mineral phases are required to better constrain the evolution of the magma.

  4. CORVI,Corvus frugilegus L.,SVERNANTI NELLA VALPADANA CENTRALE E CONSERVAZIONE DEL PAESAGGIO AGRARIO TRADIZIONALE

    Institute of Scientific and Technical Information of China (English)

    RICCARDO GROPPALI

    1993-01-01

    <正> RIASSUNTO-Nel corso di tre inverni(1990-91,1991-92 e 1992-93)sono stati osservati,lungo differentipercorsi stradali della Valpadana centrale,10370 Corvi.Per ogni individuo sono stati rilevati tipo dicoltivazione sulla quale era posato,ampiezza del campo e presenza di filari/siepi.In anni singoli sonostati esaminati altri fattori(distanza da abitazioni,dalla strada e dai filari o loro uso come posatoio).Lungo un percorso di circa 70 km(Cremona-Pavia)è stata inoltre rilevata la posizione cartografica deiCorvi osservati.Dai dati raccolti si può dedurre che questa specie può svernare soltanto in aree consufficiente varietà colturale e paesaggio agrario tradizionale,e che modificazioni gestionali possono elimi-narne la presenza.Wintering Rooks,Corvus frugilegus L.,in the central Po Valley and conservation ofthe traditional agricultural landscape.During three winter seasons(1990-91,1991-92 and 1992-93)10370Rooks were observed,along roads of the central Po Valley.The kind of cultivation,the extension offield and the presence of tree rows/hedges was noted for every resting Rook.Other factors(distancefrom habitations,road and tree rows,and their use for resting)were examined during single years.Alonga 70 km road(Cremona-Pavia,Northern Italy)the geographic position of the observed Rooks was noted.According to the observations,it seems that Rooks can winter only in areas with sufficiently variouscultivations and a traditional agricultural landscape,and that variations in their management can elimina-te the presence of the species.

  5. Selected parameters of the corneal deformation in the Corvis tonometer.

    Science.gov (United States)

    Koprowski, Robert; Lyssek-Boron, Anita; Nowinska, Anna; Wylegala, Edward; Kasprzak, Henryk; Wrobel, Zygmunt

    2014-05-03

    Contemporary ophthalmology knows many methods of measuring intraocular pressure, namely the methods of non-contact and impression applanation tonometry. In non-contact applanation tonometers, e.g. the Corvis, the corneal flattening is caused by an air puff. Image registration of the corneal deflection performed by a tonometer enables to determine other interesting biomechanical parameters of the eye, which are not available in the tonometer. The measurement of new selected parameters is presented in this paper. Images with an M × N × I resolution of 200 × 576 × 140 pixels were acquired from the Corvis device in the source recording format *.cst. A total of 13'400 2D images of patients examined routinely in the Clinical Department of Ophthalmology, in District Railway Hospital in Katowice, Poland, were analysed in accordance with the Declaration of Helsinki. A new method has been proposed for the analysis of corneal deflection images in the Corvis tonometer with the use of the Canny edge detection method, mathematical morphology methods and context-free operations. The resulting image analysis tool allows determination of the response of the cornea and the entire eyeball to an air puff. The paper presents the method that enables the measurement of the amplitude of curvature changes in the frequency range from 150 to 500 Hz and automatic designation of the eyeball movement direction. The analysis of these data resulted in 3 new features of dynamics of the eye reaction to an air puff. Classification of these features enabled to propose 4 classes of deformation. The proposed algorithm allows to obtain reproducible results fully automatically at a time of 5 s per patient using the Core i5 CPU M460 @ 2.5GHz 4GB of RAM. The paper presents the possibility of using a profiled algorithm of image analysis, proposed by the authors, to measure additional cornea deformation parameters. The new tool enables automatic measurement of the additional new

  6. Elaborazione dei dati sperimentali

    Science.gov (United States)

    Dapor, M.; Ropele, M.

    L'analisi statistica dei dati sperimentali, la loro elaborazione ed una corretta stima degli errori sono conoscenze necessarie agli studenti di fisica, biologia, chimica, ingegneria e dei corsi di specializzazione tecnico-scientifici in cui a di laboratorio. Chi si occupa di problemi tecnici e di misure, per studio o per lavoro, deve possedere gli strumenti matematici di calcolo e di analisi necessari ad una corretta interpretazione dei dati sperimentali. Il testo fornisce in modo sintetico, chiaro ed esaustivo, tutte le nozioni e le conoscenze utili allo scopo.

  7. Quantitative assessment of responses of the eyeball based on data from the Corvis tonometer.

    Science.gov (United States)

    Koprowski, Robert; Wilczyński, Sławomir; Nowinska, Anna; Lyssek-Boron, Anita; Teper, Sławomir; Wylegala, Edward; Wróbel, Zygmunt

    2015-03-01

    The "air-puff" tonometers, include the Corvis, are a type of device for measuring intraocular pressure and biomechanics parameters. The paper attempts to analyse this response and its relationship with other parameters measured in the Corvis tonometer. A number of 13,400 2D images were acquired from the Corvis device and analysed (32 healthy and 16 ill people). A new method has been proposed for the analysis of responses of the eyeball based on morphological transformations and contextual operations. The proposed algorithm enables to determine responses of the eyeball to an air puff coming from the Corvis tonometer. Additionally, responses of the eyeball have been linked to some selected features of corneal deformation. The results include, among others: (1) distinguishability between the left and right eye with an error of 7%; (2) the correlation between the area under the curve in corneal deformation and the response of the eyeball -0.26; (3) the correlation between the highest concavity time and the maximum deformation amplitude of 0.4. All these features are obtained fully automatically and repetitively at a time of 3.8s per patient (Core i7 10GB RAM). It is possible to measure additional parameters of the eye deformation which are not available in the original software of the Corvis tonometer. The use of the proposed methods of image analysis and processing provides results directly from the eye response measurement when measuring intraocular pressure. Copyright © 2015 Elsevier Ltd. All rights reserved.

  8. Elaborazione dei dati sperimentali

    CERN Document Server

    Dapor, Maurizio

    2005-01-01

    L'analisi statistica dei dati sperimentali, la loro elaborazione ed una corretta stima degli errori sono conoscenze necessarie agli studenti di fisica, biologia, chimica, ingegneria e dei corsi di specializzazione tecnico-scientifici in cui è richiesta pratica di laboratorio. Chi si occupa di problemi tecnici e di misure, per studio o per lavoro, deve possedere gli strumenti matematici di calcolo e di analisi necessari ad una corretta interpretazione dei dati sperimentali. Il testo fornisce in modo sintetico, chiaro ed esaustivo, tutte le nozioni e le conoscenze utili allo scopo. Gli argomenti sono esposti in modo rigoroso ma fluido e vengono introdotti con gradualità. Sono riportati i teoremi e le formule essenziali per una completa comprensione evitando, tuttavia, eccessivi appesantimenti matematici. Il libro è stato pensato per consentire ai docenti di scegliere autonomamente gli esperimenti per l'applicazione delle nozioni studiate.

  9. Teoria dei campi

    CERN Document Server

    Landau, Lev Davidovich

    1996-01-01

    Principio di relatività ; meccanica relativistica ; carica in un campo elettromagnetico ; equazioni del campo elettromagnetico ; campo elettromagnetico costante ; onde elettromagnetiche ; propagazione della luce ; campo di cariche in moto ; radiazione elettromagnetica ; particella in un campo gravitazionale ; equazioni del campo gravitazionale ; campo dei gravi ; onde gravitazionali ; cosmologia relativistica.

  10. Scienza dei servizi

    Science.gov (United States)

    Cavenago, Dario; Mezzanzanica, Mario

    I servizi sono oramai centrali nella vita sociale di ogni Paese. L'aspettativa di ogni attore sociale, sia esso cittadino/utente e/o istituzione, è quella di ricevere da uno scambio che ha alla base un servizio un contributo che si caratterizza per una qualità intrinseca. Il mantenimento di tale promessa richiede all'azienda erogatrice un forte coinvolgimento, nel disegno del servizio, degli utenti ed una capacità di gestione della conoscenza; ciò è particolarmente significativo per quei servizi che si caratterizzano per una forte personalizzazione o complessità progettuale. Disegnare un servizio, metterlo in produzione e gestirne l'erogazione ha una complessità variabile in base al grado di coinvolgimento dei destinati ed alle dimensioni critiche che esprimono le condizioni di fattibilità di un servizio di qualità appropriato alle attese degli utilizzatori. Ugualmente la globalizzazione dell'economia e la scarsità delle risorse ha portato l'attenzione, ai fini della sostenibilità delle condizioni sopra richiamate, di una ricerca di modelli e strumenti che permettano una valutazione e una standardizzazione dei processi di produzione ed erogazione secondo condizioni di economicità. Tali primi e sintetici elementi hanno condotto diversi attori istituzionali, grandi imprese ed università attraverso i loro centri di ricerca, ad una azione di riflessione sul grado di "ingegnerizzazione" dei processi sottesi alla erogazione dei servizi ed in particolare ai servizi che attuano le politiche dei grandi settori di base dell'economia di una Nazione: educazione, sanità, sociale, sviluppo infrastrutture ecc.

  11. Il cumulo dei redditi.

    Directory of Open Access Journals (Sweden)

    V. BARATTIERI

    2014-08-01

    Full Text Available L’imposizione dei redditi familiari è diffusa nella maggior parte dei paesi sviluppati, seppure con varianti profondamente diverse per mitigare l’onere. La tassazione separata è in vigore solo in Canada, Grecia e Nuova Zelanda, on chè , tra i paesi latini, in Argentina. Non sempre però la tassazione separata risulta più favorevole, in quanto alcune forme peculiari del cumulo, quali “splitting” ed il quoziente familiare, consentono un trattamento preferenziale per le famiglie rispetto ai nn coniugati. I vantaggi del quoziente familiare sono ancora maggiori , specie per le famiglie numerose, e questo sembra anacronistico in un momento in cui vi è larga convergenza d’opinioni sull’opportunità di non incoraggiare l’espansione demografica.

  12. Assessment of corneal biomechanical parameters in myopes and emmetropes using the Corvis ST.

    Science.gov (United States)

    Lee, Rachel; Chang, Robert T; Wong, Ian Y H; Lai, Jimmy S M; Lee, Jacky W Y; Singh, Kuldev

    2016-03-01

    Prior studies have demonstrated conflicting results regarding the relationship between corneal biomechanical properties and refractive error. Thus, the purpose of this study was to compare the corneal biomechanical parameters of myopes and emmetropes. Ninety-four subjects with varying degrees of myopia (aged 29 to 74 years, spherical equivalent [SE] -0.5 to -17.5 D) and 25 emmetropes (aged 19 to 75 years, SE: -0.5 to +0.5 D) presenting at the Queen Mary Hospital, Hong Kong were recruited sequentially for this prospective study. All patients were phakic with no history of coexisting ocular disease. The corneal biomechanical parameters of the right eye of each subject were analysed using the Corvis ST non-contact tonometer. Intraocular pressure (IOP) was measured using both the Corvis ST and the Topcon Non-Contact Tonometer CT-80. Refractive error was measured by non-cycloplegic subjective and objective refractometry. High myopes (SE greater than -6.00 D) demonstrated greater mean outward applanation velocities (p < 0.001) and peak distance measurements (p = 0.009) compared to both low to moderate myopes (SE -0.50 to -6.00 D) and emmetropes. Both outward applanation velocity and peak distance were moderately correlated with refractive error (p ≤ 0.001), strongly correlated with IOP and weakly correlated with central corneal thickness. There were no statistically significant differences in age, IOP or central corneal thickness among emmetropes, low to moderate myopes or high myopes. Within this study of Chinese subjects, high myopes demonstrate greater corneal mean outward applanation velocity on Corvis ST testing, than emmetropes. In particular, those with high myopia (SE greater than -6.00 D) show a distinct corneal biomechanical profile relative to those with either emmetropia or low to moderate myopia using the Corvis ST. © 2016 Optometry Australia.

  13. Repeatability and Reproducibility of Intraocular Pressure and Dynamic Corneal Response Parameters Assessed by the Corvis ST

    Directory of Open Access Journals (Sweden)

    Bernardo T. Lopes

    2017-01-01

    Full Text Available Purpose. To assess the repeatability and reproducibility of dynamic corneal response parameters measured by the Corvis ST (Oculus, Wetzlar, Germany. Methods. One eye randomly selected from 32 healthy volunteers was examined by the Corvis ST. Three different devices were used in an alternated random order for taking three measurements at each device in each subject. Standard intraocular pressure (IOP, the biomechanical-compensated IOP (bIOP, and DCR parameters were evaluated. The within-subject standard deviation (ζw and coefficient of variation (CV were assessed. Results. Regarding pressure indices, the ζw was below 1 mmHg for repeatability (0.98 for IOP and 0.89 for bIOP and the CV was 6.6% for IOP and 6.1% for bIOP. For reproducibility, the ζw was around 1 mmHg (1.12 for IOP and 1.05 for bIOP and the CV was 7.6% for IOP and 7.1% for bIOP. Most of DCR indices presented CV for repeatability below 4%. For reproducibility, the CV of most of the indices were below 6%. The deformation amplitude (DA ratio in 1 mm and integrated radius were below 4% (1.2% and 3.8%, resp.. Conclusions. The Corvis ST showed good precision (repeatability and reproducibility for IOP measurements and for DCR in healthy eyes.

  14. Storia della teoria dei quanti

    CERN Document Server

    Hund, Friedrich

    1980-01-01

    La storia della fisica ha vissuto tra il 1900 e il 1927 uno dei suoi periodi più entusiasmanti. La teoria dei quanti non è stata importante solo per la fisica atomica, ma ha improntato di sé tutta l'epistemologia attuale : grazie ad essa il mondo viene oggi visto con occhi diversi e il concetto di realtà ha subìto profonde modificazioni.

  15. Image analysis for ophthalmological diagnosis image processing of Corvis ST images using Matlab

    CERN Document Server

    Koprowski, Robert

    2016-01-01

    This monograph focuses on the use of analysis and processing methods for images from the Corvis® ST tonometer. The presented analysis is associated with the quantitative, repeatable and fully automatic evaluation of the response of the eye, eyeball and cornea to an air-puff. All the described algorithms were practically implemented in MATLAB®. The monograph also describes and provides the full source code designed to perform the discussed calculations. As a result, this monograph is intended for scientists, graduate students and students of computer science and bioengineering as well as doctors wishing to expand their knowledge of modern diagnostic methods assisted by various image analysis and processing methods.

  16. Fondamenti di fisica dei plasmi

    CERN Document Server

    Golant, V E; Sacharov, I E

    1983-01-01

    Introduzione ; collisioni del plasma ; equazioni cinetiche per particelle cariche ; plasmi in equilibrio termodinamico ; funzione di distribuzione di particelle cariche in un campo elettrico ; equazioni dei momenti della funzione di distribuzione ; processi di trasporto nel plasma in assenza di campi magnetici ; moto di particelle cariche nel plasma in presenza di campi magnetici ; processi di trasporto in campo magnetico ; confinamento del plasma mediante campi magnetici.

  17. Dinamica classica dei sistemi fisici

    CERN Document Server

    Turchetti, Giorgio

    1998-01-01

    Principi generali ; problemi unidimensionali ; campo centrale ; sistemi di punti ; punto vincolato ; sistemi di punti vincolati ; simmetrie ; rotazioni e moto relativo ; corpo rigido ; sistemi lineari ; stabilità ; teoria qualitativa ; piccole oscillazioni ; principi variazionali ; trasformazioni canoniche ; serie di Lie ; proprietà dell'azione ; sistemi integrabili ; teoria perturbativa ; sistemi quasi integrabili ; sistemi caotici ; integrazione numerica ; modelli hamiltoniani ; equazioni stocastiche ; meccanica statistica ; corda elastica ; equazione delle onde ; meccanica dei continui.

  18. Eye retraction and rotation during Corvis ST 'air puff' intraocular pressure measurement and its quantitative analysis.

    Science.gov (United States)

    Boszczyk, Agnieszka; Kasprzak, Henryk; Jóźwik, Agnieszka

    2017-05-01

    The aim of this study was to analyse the indentation and deformation of the corneal surface, as well as eye retraction, which occur during air puff intraocular pressure (IOP) measurement. A group of 10 subjects was examined using a non-contact Corvis ST tonometer, which records image sequences of corneas deformed by an air puff. Obtained images were processed numerically in order to extract information about corneal deformation, indentation and eyeball retraction. The time dependency of the apex deformation/eye retraction ratio and the curve of dependency between apex indentation and eye retraction take characteristic shapes for individual subjects. It was noticed that the eye globes tend to rotate towards the nose in response to the air blast during measurement. This means that the eye globe not only displaces but also rotates during retraction. Some new parameters describing the shape of this curve are introduced. Our data show that intraocular pressure and amplitude of corneal indentation are inversely related (r 8  = -0.83, P = 0.0029), but the correlation between intraocular pressure and amplitude of eye retraction is low and not significant (r 8  = -0.24, P = 0.51). The curves describing corneal behaviour during air puff tonometry were determined and show that the eye globe rotates towards the nose during measurement. In addition, eye retraction amplitudes may be related to elastic or viscoelastic properties of deeper structures in the eye or behind the eye and this should be further investigated. Many of the proposed new parameters present comparable or even higher repeatability than the standard parameters provided by the Corvis ST. © 2017 The Authors Ophthalmic & Physiological Optics © 2017 The College of Optometrists.

  19. I diritti sindacali nel titolo III dello Statuto dei lavoratori

    Directory of Open Access Journals (Sweden)

    Alessandro Riccobono

    2011-12-01

    Full Text Available Sommario: 1. I diritti sindacali: struttura del titolo III e differenze rispetto al titolo II dello Statuto dei la­voratori. – 2. I limiti all’esercizio dell’attività sindaca­le privilegiata. – 2.1. segue: la selezione dei soggetti protetti. – 2.2. segue: il criterio dimensionale e la no­zione di unità produttiva. – 2.3. segue: il contempera­mento con interessi pari o sovraordinati. – 3. Il diritto di assemblea tra istanze di democrazia diretta e afflati di democrazia rappresentativa. – 3.1. I soggetti legitti­mati alla convocazione. – 3.2. Il dibattito sulla titolari­tà, individuale o collegiale, del potere di convocazione. – 3.3. L’oggetto dell’assemblea. – 3.4. Il luogo di svol­gimento dell’assemblea. – 3.5. Assemblea in orario di lavoro. – 3.6. Imputazione del monte orario e diritto alla conservazione della retribuzione. – 3.7. Il ruolo della contrattazione collettiva. – 4. Il referendum: struttura e funzione. – 4.1. I contenuti e le modalità di svolgimento. – 5. Il trasferimento dei dirigenti sindaca­li: profili generali. – 5.1. Il rapporto con i divieti di di­scriminazione ex art. 15 st. lav. – 5.3. I soggetti benefi­ciari. – 5.4. L’ambito di applicazione oggettivo. – 5.5. L’applicazione dell’art. 22 nel pubblico impiego. Cen­ni. – 6. Il diritto di affissione. Profili generali. – 6.1. Ti­pologia ubicazione e distribuzione dei canali informa­tivi. – 6.2. Contenuti delle comunicazioni e limiti alla defissione unilaterale da parte del datore di lavoro. – 7. I locali delle Rsa. – 7.1. Le caratteristiche dei locali: idoneità, dotazioni, ubicazione. – 7.2. Sulla possibilità di ingresso da parte dei sindacalisti esterni. – 7.3. La disciplina apprestata per le articolazioni aziendali di minori dimensioni.

  20. Characterizing the X-ray & Stellar Wind Environment in the ~1 Gyr Late Heavy Bombardment System Eta Corvi

    Science.gov (United States)

    Lisse, Carey

    2012-09-01

    We propose a 40 ksec ACIS-S observation of the 1 Gyr old system Eta Corvi, the site of an on-going Late Heavy Bombardment (Lisse et al. 2012), in order to determine the spectrum of x-ray radiation in the burgeoning system, its origin in the stellar coronae and circumstellar debris belts, and its impact on the water and organics recently delivered to a rocky planet in the terrestrial habitability zone.

  1. Open source software for the analysis of corneal deformation parameters on the images from the Corvis tonometer.

    Science.gov (United States)

    Koprowski, Robert

    2015-04-11

    The software supplied with the Corvis tonometer (which is designed to measure intraocular pressure with the use of the air-puff method) is limited to providing basic numerical data. These data relate to the values of the measured intraocular pressure and, for example, applanation amplitudes. However, on the basis of a sequence of images obtained from the Corvis tonometer, it is possible to obtain much more information which is not available in its original software. This will be presented in this paper. The proposed software has been tested on 1400 images from the Corvis tonometer. The number of analysed 2D images (with a resolution of 200 × 576 pixels) in a sequence is arbitrary. However, in typical cases there are 140 images. The proposed software has been written in Matlab (Version 7.11.0.584, R2010b). The methods of image analysis and processing and in particular edge detection and the fast Fourier transform have been applied. The software allows for fully automatic (1) acquisition of 12 new parameters previously unavailable in the original software of the Corvis tonometer. It also enables off-line (2) manual and (3) automatic browsing of images in a sequence; 3D graph visualization of: (4) the corneal deformation and (5) eyeball response; 6) change of the colour palette; (7) filtration and (8) visualization of selected measured values on individual 2D images. In addition, the proposed software enables (9) to save the obtained results for further analysis and processing. The dedicated software described in this paper enables to obtain additional new features of corneal deformations during intraocular pressure measurement. The software can be applied in the diagnosis of corneal deformation vibrations, glaucoma diagnosis, evaluation of measurement repeatability and others. The software has no licensing restrictions and can be used both commercially and non-commercially without any limitations.

  2. A cross-sectional study to compare intraocular pressure measurement by sequential use of Goldman applanation tonometry, dynamic contour tonometry, ocular response analyzer, and Corvis ST

    Directory of Open Access Journals (Sweden)

    Sushma Tejwani

    2015-01-01

    Full Text Available Objective: To study the correlation and effect of sequential measurement of intraocular pressure (IOP with Goldmann applanation tonometer (GAT, ocular response analyzer (ORA, dynamic contour tonometer (DCT, and Corvis ST. Setting and Design: Observational cross-sectional series from the comprehensive clinic of a tertiary eye care center seen during December 2012. Methods: One hundred and twenty-five study eyes of 125 patients with normal IOP and biomechanical properties underwent IOP measurement on GAT, DCT, ORA, and Corvis ST; in four different sequences. Patients with high refractive errors, recent surgeries, glaucoma, and corneal disorders were excluded so as to rule out patients with evident altered corneal biomechanics. Statistical Analysis: Linear regression and Bland-Altman using MedCalc software. Results: Multivariate analysis of variance with repeated measures showed no influence of sequence of device use on IOP (P = 0.85. Linear regression r 2 between GAT and Corvis ST, Corvis ST and Goldmann-correlated IOP (IOPg, and DCT and Corvis ST were 0.37 (P = 0.675, 0.63 (P = 0.607, and 0.19 (P = 0.708, respectively. The Bland-Altman agreement of Corvis ST with GAT, corneal compensated IOP, and IOPg was 2 mmHg (−5.0 to + 10.3, −0.5 mmHg (−8.1 to 7.1, and 0.5 mmHg (−6.2 to 7.1, respectively. Intraclass correlation coefficient for repeatability ranged from 0.81 to 0.96. Conclusions: Correlation between Corvis ST and ORA was found to be good and not so with GAT. However, agreement between the devices was statistically insignificant, and no influence of sequence was observed.

  3. Modeling the η Corvi debris disk from the sub-AU scale to its outermost regions

    Science.gov (United States)

    Lebreton, J.; Beichman, C. A.; Bryden, G.; Defrère, D.; Mennesson, Bertr; Millan-Gabet, R.

    2014-03-01

    Dusty debris disks surrounding main sequence stars are thought to be analogues to thepopulations of small bodies of the Solar System (asteroids, comets/icy bodies and dust grains), however with often much higher masses and associated dust production rates. Mecanisms such as massive collisions or LHB-like events must therefore be invoked to justify their existence. This is especially striking for the nearby F2V star η Corvi that shows a very strong mid- and far-infrared excess despite an estimated age of ~1.4 Gyr (Lisse et al. 2012, Wyatt et al. 2005). We present new observations of the η Crv debris disk obtained in the far-infrared with Herschel/PACS and SPIRE and in the mid-infrared with the Keck Interferometer Nuller (Millan-Gabet et al. 2011). The Herschel/PACS images at 70, 100 and 160 μm reveal a well resolved belt of cold material at ~130 AU, as well as an unresolved component in the innermost parts of the system. This warmer counterpart is resolved in the mid-infrared as a strong null excess originating from within the ~2x4 AU field-of-view of the interferometer, which is reminiscent of the architecture of the Fomalhaut debris disk (Mennesson et al. 2012, Lebreton et al. 2013). The signature of warm silicate dust is also very clear in Spitzer/IRS high-resolution spectra (Chen et al. 2006) at intermediate wavelengths (10-35 μm). We undertake to establish a consistent model of the debris disk from the sub-AU scale to its outermost regions using the GRaTer radiative transfer code (Augereau et al. 1999a, Lebreton et al. 2013) by adjusting simultaneously the interferometric nulls, the resolved Herschel images and the spectro-photometric data against a large parameter space. Our analysis providesaccurate estimates of the fundamental parameters of the disk: its surface density profile, grain size distribution and mass, making it possible to unveil the origin of the dust and the relation between the cold (~50 K) Kuiper-like belt and the warm (~500 K) exo

  4. Principle of diffraction enhanced imaging (DEI) and computed tomography based on DEI method

    International Nuclear Information System (INIS)

    Zhu Peiping; Huang Wanxia; Yuan Qingxi; Wang Junyue; Zheng Xin; Shu Hang; Chen Bo; Liu Yijin; Li Enrong; Wu Ziyu; Yu Jian

    2006-01-01

    In the first part of this article a more general DEI equation was derived using simple concepts. Not only does the new DEI equation explain all the problems that can be done by the DEI equation proposed by Chapman, but also explains the problem that can not be explained with the old DEI equation, such as the noise background caused by the small angle scattering reflected by the analyzer. In the second part, a DEI-PI-CT formula has been proposed and the contour contrast caused by the extinction of refraction beam has been qualitatively explained, and then based on the work of Ando's group two formulae of refraction CT with DEI method has been proposed. Combining one refraction CT formula proposed by Dilmanian with the two refraction CT formulae proposed by us, the whole framework of CT algorithm can be made to reconstruct three components of the gradient of refractive index. (authors)

  5. Effects of laser in situ keratomileusis (LASIK) on corneal biomechanical measurements with the Corvis ST tonometer.

    Science.gov (United States)

    Frings, Andreas; Linke, Stephan J; Bauer, Eva L; Druchkiv, Vasyl; Katz, Toam; Steinberg, Johannes

    2015-01-01

    This study was initiated to evaluate biomechanical changes using the Corvis ST tonometer (CST) on the cornea after laser in situ keratomileusis (LASIK). University Medical Center Hamburg-Eppendorf, Germany, and Care Vision Refractive Centers, Germany. Retrospective cohort study. This retrospective study included 37 eyes of 37 refractive patients. All CST measurements were performed 1 day before surgery and at the 1-month follow-up examination. The LASIK procedure included mechanical flap preparation using a Moria SBK microkeratome and an Allegretto excimer laser platform. Statistically significant differences were observed for mean first applanation length, mean first and second deflection lengths, mean first and second deflection amplitudes, radius of curvature, and peak distance. Significant positive correlations were found between the change (Δ) of radius of curvature and manifest refraction spherical equivalent (MRSE), ablation depth, and Δintraocular pressure as well as between AD and ΔHC-time. Each diopter of myopic correction in MRSE resulted in an increase in Δradius of curvature of 0.2 mm. Several CST parameters were statistically significantly altered by LASIK, thereby indicating that flap creation, ablation, or both, significantly change the ability of the cornea to absorb or dissipate energy.

  6. L’addomesticamento dei corpi selvaggi

    Directory of Open Access Journals (Sweden)

    Maurizio Gnerre

    2013-07-01

    Full Text Available Nella prima parte di questo testo esporrò in modo sintetico alcuni concetti necessari a un impianto prospettico sulle radici corporee della significazione. In tale ambito, porrò in evidenza il ruolo dei micro- e macro-gesti e dei movimenti e della costruzione degli spazi socio-comunicativi che emergono da coordinamenti e sincronizzazioni motorie. Sulla base dei concetti esposti procederò a un’interpretazione di una dimensione centrale dell’attuazione missionaria, quella rivolta alla re-impostazione della gestualità.

  7. Il bizzarro mondo dei quanti

    CERN Document Server

    Camejo, Silvia Arroyo

    2008-01-01

    Scritto prima dell'esame di maturità da una giovane di eccezionale talento, questo libro colma il vuoto esistente tra la letteratura divulgativa sulla fisica quantistica, che normalmente evita ogni formula matematica, e la letteratura specialistica, ben farcita, invece, di matematica avanzata. L'autrice, appena diciannovenne, con l'ausilio della sola matematica della scuola superiore, introduce il lettore ai principi della fisica dei quanti. Se ne ricava uno sguardo profondo sul microcosmo, il regno affascinante delle particelle elementari: oggetti il cui comportamento si distingue in modo drastico e fondamentale da tutto ciò a cui è avvezzo il nostro umano buonsenso. "Un libro... che avrei desiderato avere a 17 anni". Silvia Arroyo Camejo "In modo assolutamente preciso dal punto di vista fisico, l'autrice spiega con grande passione e divertimento i fondamenti della moderna fisica quantistica ... " Prof. Reinhold A. Bertlmann "Un libro stupefacente di un'autrice straordinaria! Si avverte il suo entusiasmo ...

  8. Prosumer e star dei videogiochi

    Directory of Open Access Journals (Sweden)

    Giuseppe Frazzetto

    2012-03-01

    Full Text Available Su molti server di World of Warcraft ci sono toon (“personaggi” pilotati dal giocatore “famosi”. Il caso più significativo è quello di Kungen (cioè “re”, toon del giocatore svedese Thomas Bengtsson, leader prima dei Nihilum poi di un’altra celebre gilda, Ensidia. Questa peculiare fama settoriale è certamente legata alla struttura degli MMORPG, al loro essere basati su una specifica forma di socializzazione. Tuttavia ci si potrebbe chiedere: il giocatore capace di guidare un suo toon fino alla “celebrità” è un “produttore”? Un prosumer? Certo, non è “produttore” del software. Qui è in questione qualcosa di molto diverso.

  9. IRAC Monitoring of the Late Heavy Comet Bombardment in the eta Corvi System

    Science.gov (United States)

    Marengo, Massimo; Lisse, Carey; Stapelfeldt, Karl; Hulsebus, Alan

    2014-12-01

    The nearby sun-like star eta Corvi (F2V, d=18 pc, age =1.2 Gyr) has long been known to possess a bright, dusty Kuiper Belt that has now been resolved with Herschel PACS. A warm inner dust belt indicated by an IRAS 12 micron excess and has recently been resolved as a 3-AU scale structure by VLT observations. In 2012 Lisse et al. further characterized this warm dust using Spitzer IRS, identifying the signatures of ice, organics and silicate dust in this system's Terrestrial Habitability Zone (THZ). The system appears to be undergoing a Late Heavy Bombardment (LHB), delivering primitive, water- and organic-rich material from the Kuiper Belt to the THZ, at roughly the same relative age as the solar system's LHB. Our data also showed an upturn in the excess flux shortwards of 6 micron ? evidence for a surprisingly large amount of icy dust scattering in the inner system (fscat/fstar ~ 1.0%). This results is corroborated by our recent 2-5 micron NASA/IRTF SpeX spectroscopy. In 2012 we have obtained Spitzer/IRAC photometric data for the system, detecting the disk at 3.6 and 4.5 micron in two separate epochs, followed by a third epoch in 2013. We now propose to continue our photometric monitoring with 15 additional visits to be scheduled within cycle 11, in order to extend our temporal coverage to 4 years on a variety of timescales ranging from days, to weeks, to months. The proposed campaign will allow us to test the two competing hypothesis for the origin of the warm disk: (1) single collison event leading to the breakup of a large Kuiper Belt object in the system or (2) continual raining of small comets scattered towards the inner system.

  10. UN NUOVO DUVALIUS DEI MONTI MARTANI (UMBRIA (Coleoptera, Carabidae

    Directory of Open Access Journals (Sweden)

    P. Magrini

    2006-10-01

    Full Text Available Viene descritto Duvalius consortii n. sp. del Monte Martano in Umbria: anoftalmo, con habitus molto specializzato e quindi insolito per un endogeo. In base alla struttura dell’organo genitale maschile la nuova specie risulta non inquadrabile in nessuno dei gruppi di specie già noti (Magrini 1997, 1998. La forma dell’edeago, corto, tozzo e uncinato inferiormente all’apice è ben diversa da quella di tutti i Duvalius noti, mentre la lamella copulatrice si discosta nettamente da quella delle specie dell’Italia centro-meridionale, ricordando solo vagamente la forma di quella di alcuni gruppi alpini,come Duvalius boldorii Jeannel, 1926, ma riteniamo che si tratti sicuramente solo di una convergenza evolutiva. Per questo taxon viene pertanto considerata una nuova linea filetica nella quale istituiamo un “gruppo consortii”.

  11. Assessment of Corneal Biomechanical Properties by CorVis ST in Patients with Dry Eye and in Healthy Subjects

    Directory of Open Access Journals (Sweden)

    Qin Long

    2015-01-01

    Full Text Available Purpose. To investigate corneal biomechanical properties in patients with dry eye and in healthy subjects using Corneal Visualization Scheimpflug Technology (CorVis ST. Methods. Biomechanical parameters were measured using CorVis ST in 28 eyes of 28 patients with dry eye (dry eye group and 26 normal subjects (control group. The Schirmer I test value, tear film break-up time (TBUT, and corneal staining score (CSS were recorded for each eye. Biomechanical properties were compared between the two groups and bivariate correlation analysis was used to assess the relationship between biomechanical parameters and dry eye signs. Results. Only one of the ten biomechanical parameters was significantly different between the two groups. Patients in the dry eye group had significantly lower highest concavity time (HC-time (P=0.02 than the control group. Correlation analysis showed a significant negative correlation between HC-time and CSS with marginal P value (ρ=-0.39, P=0.04 in the dry eye group. Conclusions. The corneal biomechanical parameter of HC-time is reduced in dry eyes compared to normal eyes. There was also a very weak but significant negative correlation between HC-time and CSS in the dry eye group, indicating that ocular surface damage can give rise to a more compliant cornea in dry eyes.

  12. Meccanica quantistica relativistica introduzione alla teoria quantistica dei campi

    CERN Document Server

    Maiani, Luciano

    2012-01-01

    Tra gli argomenti trattati: le simmetrie dello spazio-tempo; la particella libera classica; teoria lagrangiana dei campi; quantizzazione dell' equazione di Klein Gordon; quantizzazione del campo elettromagnetico; l'equazione di Dirac; i propagatori dei campi liberi; interazioni; evoluzione nel tempo dei sistemi quantistici; teoria relativistica delle perturbazioni...

  13. Vaccinazione antinfluenzale nella ASL RMF della Regione Lazio: verifica dei risultati e dei costi sostenuti

    Directory of Open Access Journals (Sweden)

    L. Di Marzio

    2003-05-01

    Full Text Available

    Obiettivi: la vaccinazione antinfluenzale nella
    Regione Lazio dalla campagna 1999-2000 viene
    condotta sulla base di un protocollo regionale che,
    per favorire il raggiungimento degli obiettivi stabiliti
    dal Piano Sanitario Nazionale, coinvolge i
    Medici di Medicina Generale (MMG prevedendo
    una remunerazione aggiuntiva in parte fissa (a prestazione, in parte variabile (condizionata dal risultato
    del singolo medico e della ASL.
    Gli autori si propongono una verifica dei risultati raggiunti e dei costi sostenuti dall’ultima campagna eseguita con sole risorse aziendali del 1998-99 a quella del 2002-03.

    Metodi: il protocollo regionale prevede la raccolta
    delle informazioni per ciascun vaccinato presente
    nell’anagrafe informatizzata degli assistiti aziendali
    e ciò consente la valutazione delle coperture vaccinali
    aziendale e per ciascun MMG.
    Parallelamente sono considerati costi dei vaccini
    acquistati e retribuzione aggiuntiva dei MMG.

    Risultati: esaminati gli archivi dal 1998-99 al 2002-
    03, emerge il progressivo coinvolgimento dei MMG fino al recente 97%, l’aumento inequivocabile delle dosi di vaccino somministrate (da 9.406 a 36.692 e del tasso di copertura negli anziani (dal 24,2% al 66%. Invece la percentuale dei vaccini somministrati ai ›65 diminuisce dal 85,47% al 71,77% ed aumenta a favore dei più giovani così da risultare coperture negli ultrasessantacinquenni inferiori alle attese.Con gli anni l’integrazione dell’esperienza del servizio e dei MMG ha favorito un più oculato approvvigionamento
    con diminuzione degli sprechi passando dal 15,56% nel 2000-01 all’attuale 4,45%, ma contestualmente i costi risultano decuplicati (da 90 a 938 milioni di lire per maggior numero di dosi somministrate e costo delle prestazioni dei MMG

  14. LA RIABILITAZIONE IMPLANTOPROTESICA DEI PAZIENTI SOTTOPOSTI A RESEZIONE ONCOLOGICA DEI MASCELLARI: NOSTRO PROTOCOLLO DI TRATTAMENTO.

    OpenAIRE

    Bucci, Tommaso

    2010-01-01

    I pazienti sottoposti a resezione oncologica per patologia neoplastica del cavo orale, subiscono interventi chirurgici molto spesso mutilanti che, nonostante la ricostruzione del difetto osseo e dei tessuti molli, determinano una alterazione della normale anatomia della cavitá orale, una alterazione dei normali movimenti della lingua e della mandibola, un deficit della sensibilitá propriocettiva della mucosa orale. Tutte queste variabili determinano una impossibilitá da parte del pazie...

  15. The Grotta dei Cervi (Otranto – Lecce

    Directory of Open Access Journals (Sweden)

    Elettra Ingravallo

    2007-12-01

    Full Text Available Warburg (1988 offers an interesting interpretative approach to the images of Grotta dei Cervi by the notion of the concept of ‘survival’. We can read them as the images of memory which acquire other meanings every time they are brought back to the present flow.

  16. On generalized Rédei functions

    Directory of Open Access Journals (Sweden)

    R. Matthews

    1988-01-01

    Full Text Available A generalization of Rédei functions to polynomial vectors in n indeterminates over finite fields or residue class rings of integers is given by considering special types of polynomial vectors. Properties such as polynomial composition, change of basis, group structure and fixed points are studied together with applications in cryptography.

  17. Fisica degli atomi e dei nuclei

    CERN Document Server

    Bernardini, Carlo

    1965-01-01

    Evidenza della struttura atomica della materia ; le proprietà degli atomi e la meccanica atomica ; gli atomi e le radiazioni elettromagnetiche ; struttura microscopica dello stato gassoso ; struttura microscopica dello stato liquido ; struttura microscopica della stato solido ; proprietà elettriche e magnetiche delle sostanze ; proprietà dei nuclei degli atomi ; le particelle elementari.

  18. Il Garante e la protezione dei dati personali

    OpenAIRE

    Carlesi, Carlo

    2006-01-01

    Presentazione PowerPoint, svolta come parte del tema: Sicurezza dei dati e applicazione del 'Codice in materia di protezione dei dati personali', nell'ambito del corso di formazione 'STeP: Sicurezza Tutela e Privacy'. Obiettivo della presentazione, illustrare le principali attivit? svolte dal 'Garante per la protezione dei dati personali' in qualit? di autorit? indipendente istituita con la legge n.675 del 1996, detta anche legge sulla 'Privacy'.

  19. Analisi della dipendenza spaziale dei prezzi delle abitazioni e dei sottomercati abitativi nella Tainan Metropolis, Taiwan

    Directory of Open Access Journals (Sweden)

    Bor-Ming Hsieh

    2012-06-01

    Full Text Available All’interno di questo studio vengono utilizzate diverse metodologie, comprese alcune tecniche di analisi statistica e spaziale, sia per definire i sottomercati spaziali dei prezzi delle abitazioni che per esaminare la dipendenza spaziale dei prezzi delle abitazioni. I dati sono desunti dai prezzi delle transazioni relativi al 2009, riferite all’edilizia abitativa nella Tainan Metropolis. La Tainan Metropolis è una nuova metropoli formata dalla fusione dell'ex Tainan City e di Tainan County. In seguito alla fusione delle municipalità verranno adeguati i confini amministrativi e, nel frattempo, è opportuno individuare i sottomercati spaziali dei prezzi delle abitazioni nell'area metropolitana in relazione ai sottomercati relativi ai precedenti confini amministrativi. Si è constatato che i prezzi più alti delle abitazioni sono concentrati nella zona del centro della città, mentre i prezzi più bassi sono diffusi soprattutto nell'anello esterno al centro della città di Tainan Metropolis. Nella sperimentazione dell’autocorrelazione spaziale dei prezzi delle abitazioni, si è rilevato che si riscontrava una significativa dipendenza spaziale tra i prezzi delle case. I risultati della modellazione dei prezzi delle abitazioni mostrano che i sottomercati spaziali derivati da tecniche di autocorrelazione spaziale hanno impatti più forti e più significativi sui prezzi delle case, inoltre, rispetto ai due modelli alternativi, il modello ha una migliore goodness-of-fit. Le tecniche spaziali possono essere considerate metodi appropriati per classificare sottomercati spaziali dei prezzi delle abitazioni soprattutto nelle aree metropolitane.

  20. Fenologia dei Chirotteri nella grotta di Onferno

    Directory of Open Access Journals (Sweden)

    Massimo Bertozzi

    2003-10-01

    Full Text Available Con le sue 11 specie e le oltre 6000 presenze di Chirotteri la Riserva naturale orientata di Onferno è certamente un punto di notevole interesse nel patrimonio naturale italiano. A seguito dei piani di indagine e di sorveglianza posti in essere fin dalla sua creazione nel 1992 da parte della gestione della Riserva e soprattutto grazie al progetto LIFE in corso, si riassumono qui i principali tratti fenologci delle diverse specie nella cavità. Il sistema ipogeo è altamente differenziato topografica e in termini di microclima, come rilevato dal sistema di monitoraggio presente. Da Dicembre inizia il periodo più tipicamente invernale con rapido abbandono della cavità principale da parte dei miniotteri. Vi rimangono poche decine di esemplari e altrettanti rinolofidi delle diverse specie. Tale situazione si prolunga con alcune piccole variazioni fino a Marzo. Al cambio di stagione i miniotteri si muovono dai rifugi posti soprattutto in un tunnel a S. Marino (circa 11 km in linea d?aria a temperatura tra i 3 e 5 °C per tornare nel tratto principale a circa 7°C. I rinolofidi mantengono le posizioni e i numeri precedenti. Con Aprile il gruppo dei miniotteri, oramai completo o quasi, si sposta nella Sala Guano o rimane in vari ambiti del percorso principale. I rinolofidi appaiono in movimento ma il loro numero diminuisce almeno dalle zone di controllo. A Maggio compaiono anche i grandi vespertili già aggregati al grande gruppo dei miniotteri che spesso si presenta in contingenti suddivisi in vari ambiti della grotta. Non si ritrovano più rinolofi maggiori, mentre euryale e minore raggiungono le sale più calde e secche. Con Giugno i contingenti si concentrano nella grande sala ?Quarina? per formare nella seconda metà la colonia riproduttiva. Dal 15 circa iniziano i parti in tutte le specie. Nel Miniottero si registrano scarti di almeno una settimana tra l?avvio della riproduzione e le ultime nascite. Tutto Luglio è speso nella crescita dei

  1. Effetti dei blocchi totali del traffico motorizzato sulla concentrazione dei principali inquinamenti atmosferici

    Directory of Open Access Journals (Sweden)

    C. Signorelli

    2003-05-01

    Full Text Available

    Obiettivi: il contenimento degli inquinamenti atmosferici attraverso blocchi parziali e totali dei veicoli circolanti nelle aree critiche è un tema molto dibattuto negli ultimi anni, soprattutto in relazione all’efficacia a breve e medio termine di questi provvedimenti sulla concentrazione degli inquinanti nell’aria. Sulla base dei dati diffusi dall’ARPA della Regione Lombardia sono stati analizzati gli effetti di due blocchi totali del traffico motorizzato, avvenuti in due domeniche dell’inverno 2001-2002, sulle concentrazioni di due inquinanti specifici per il traffico veicolare, il PM10 e il benzene.

    Metodologia: l’analisi è stata condotta in Lombardia considerando i dati ambientali delle tre zone critiche dove sono stati registrati i valori più elevati di inquinanti atmosferici e dove sono stati attuati i blocchi del traffico come misura d’emergenza (Milano, Como e Sempione. Tramite l’elaborazione di alcuni parametri metereologici, di grafici e di dati relativi l’andamento delle medie giornaliere e orarie degli inquinanti considerati è stata, quindi valutata l’efficacia dei blocchi stradali ai fini della diminuzione dell’inquinamento atmosferico.

    Risultati: i risultati ottenuti hanno evidenziato che le concentrazioni di inquinanti subiscono complessivamente un calo nelle ore di blocco del traffico, ma risalgono rapidamente a partire dalle ore successive la conclusione dei blocchi e non subiscono variazioni significative nei giorni successivi. I fattori metereologici (vento e pioggia intensa rivestono grande importanza nel condizionare la concentrazioni di PM10 e benzene.

    Conclusioni: i risultati confermano che i provvedimenti d’emergenza di limitazione del traffico non rappresentano una soluzione definitiva per ridurre complessivamente l’inquinamento atmosferico nelle aree urbane. Risulta, quindi, necessario effettuare

  2. Spitzer Evidence for a Late Heavy Bombardment and the Formation of Urelites in {eta}Corvi at Approximately 1 Gyr

    Science.gov (United States)

    Lisse, C. M.; Wyatt, M. C.; Chen, C. H.; Morlok, A.; Watson, D. M.; Manj, P.; Sheehan, P.; Currie, T. M.; Thebault, P.; Sitko, M. L.

    2011-01-01

    We have analyzed Spitzer and NASA/IRTF 2 - 35 micrometer spectra of the warm, 350 K circumstellar dust around the nearby MS star eta Corvi (F2V, 1.4 plus or minus 0.3 Gyr). The spectra show clear evidence for warm, water- and carbon-rich dust at 3 AU from the central star, in the system's Terrestrial Habitability Zone. Spectral features due to ultra-primitive cometary material were found, in addition to features due to impact produced silica and high temperature carbonaceous phases. At least 9 x 10(exp 18) kg of 0.1 - 100 micrometer warm dust is present in a collisional equilibrium distribution with dn/da a(exp -3.5), the equivalent of a 130 km radius KBO of 1.0 grams per cubic centimeter density and similar to recent estimates of the mass delivered to the Earth at 0.6 - 0.8 Gyr during the Late Heavy Bombardment. We conclude that the parent body was a Kuiper-Belt body or bodies which captured a large amount of early primitive material in the first Myrs of the system's lifetime and preserved it in deep freeze at approximately 150 AU. At approximately 1.4 Gyr they were prompted by dynamical stirring of their parent Kuiper Belt into spiraling into the inner system, eventually colliding at 5-10 kilometers per second with a rocky planetary body of mass less than or equal to M(sub Earth at approximately 3 AU, delivering large amounts of water (greater than 0.1 % of M(sub Earth's Oceans)) and carbon-rich material. The Spitzer spectrum also closely matches spectra reported for the Ureilite meteorites of the Sudan Almahata Sitta fall in 2008, suggesting that one of the Ureilite parent bodies was a KBO.

  3. SPITZER EVIDENCE FOR A LATE-HEAVY BOMBARDMENT AND THE FORMATION OF UREILITES IN {eta} CORVI At {approx}1 Gyr

    Energy Technology Data Exchange (ETDEWEB)

    Lisse, C. M. [JHU-APL, 11100 Johns Hopkins Road, Laurel, MD 20723 (United States); Wyatt, M. C. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA (United Kingdom); Chen, C. H. [STScI, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Morlok, A. [Department of Earth and Planetary Sciences, The Open University, Milton-Keynes (United Kingdom); Watson, D. M.; Manoj, P.; Sheehan, P. [Department of Physics and Astronomy, University of Rochester, Rochester, NY (United States); Currie, T. M. [NASA-GSFC, Code 667, Greenbelt, MD 20771 (United States); Thebault, P. [Observatoire de Paris, F-92195 Meudon Principal Cedex (France); Sitko, M. L., E-mail: carey.lisse@jhuapl.edu, E-mail: wyatt@ast.cam.ac.uk, E-mail: cchen@stsci.edu, E-mail: a.morlok@open.ac.uk, E-mail: dmw@pas.rochester.edu, E-mail: manoj@pas.rochester.edu, E-mail: psheeha2@mail.rochester.edu, E-mail: thayne.m.currie@nasa.gov, E-mail: philippe.thebault@obspm.fr, E-mail: sitko@spacescience.org [Space Science Institute, 475 Walnut Street, Suite 205, Boulder, CO 80301 (United States)

    2012-03-10

    We have analyzed Spitzer and NASA/IRTF 2-35 {mu}m spectra of the warm, {approx}350 K circumstellar dust around the nearby MS star {eta} Corvi (F2V, 1.4 {+-} 0.3 Gyr). The spectra show clear evidence for warm, water- and carbon-rich dust at {approx}3 AU from the central star, in the system's terrestrial habitability zone. Spectral features due to ultra-primitive cometary material were found, in addition to features due to impact produced silica and high-temperature carbonaceous phases. At least 9 Multiplication-Sign 10{sup 18} kg of 0.1-100 {mu}m warm dust is present in a collisional equilibrium distribution with dn/da {approx} a{sup -3.5}, the equivalent of a 130 km radius Kuiper Belt object (KBO) of 1.0 g cm{sup 3} density and similar to recent estimates of the mass delivered to the Earth at 0.6-0.8 Gyr during the late-heavy bombardment. We conclude that the parent body was a Kuiper Belt body or bodies which captured a large amount of early primitive material in the first megayears of the system's lifetime and preserved it in deep freeze at {approx}150 AU. At {approx}1.4 Gyr they were prompted by dynamical stirring of their parent Kuiper Belt into spiraling into the inner system, eventually colliding at 5-10 km s{sup -1} with a rocky planetary body of mass {<=}M{sub Earth} at {approx}3 AU, delivering large amounts of water (>0.1% of M{sub Earth'sOceans}) and carbon-rich material. The Spitzer spectrum also closely matches spectra reported for the Ureilite meteorites of the Sudan Almahata Sitta fall in 2008, suggesting that one of the Ureilite parent bodies was a KBO.

  4. SPITZER EVIDENCE FOR A LATE-HEAVY BOMBARDMENT AND THE FORMATION OF UREILITES IN η CORVI At ∼1 Gyr

    International Nuclear Information System (INIS)

    Lisse, C. M.; Wyatt, M. C.; Chen, C. H.; Morlok, A.; Watson, D. M.; Manoj, P.; Sheehan, P.; Currie, T. M.; Thebault, P.; Sitko, M. L.

    2012-01-01

    We have analyzed Spitzer and NASA/IRTF 2-35 μm spectra of the warm, ∼350 K circumstellar dust around the nearby MS star η Corvi (F2V, 1.4 ± 0.3 Gyr). The spectra show clear evidence for warm, water- and carbon-rich dust at ∼3 AU from the central star, in the system's terrestrial habitability zone. Spectral features due to ultra-primitive cometary material were found, in addition to features due to impact produced silica and high-temperature carbonaceous phases. At least 9 × 10 18 kg of 0.1-100 μm warm dust is present in a collisional equilibrium distribution with dn/da ∼ a –3.5 , the equivalent of a 130 km radius Kuiper Belt object (KBO) of 1.0 g cm 3 density and similar to recent estimates of the mass delivered to the Earth at 0.6-0.8 Gyr during the late-heavy bombardment. We conclude that the parent body was a Kuiper Belt body or bodies which captured a large amount of early primitive material in the first megayears of the system's lifetime and preserved it in deep freeze at ∼150 AU. At ∼1.4 Gyr they were prompted by dynamical stirring of their parent Kuiper Belt into spiraling into the inner system, eventually colliding at 5-10 km s –1 with a rocky planetary body of mass ≤M Earth at ∼3 AU, delivering large amounts of water (>0.1% of M Earth'sOceans ) and carbon-rich material. The Spitzer spectrum also closely matches spectra reported for the Ureilite meteorites of the Sudan Almahata Sitta fall in 2008, suggesting that one of the Ureilite parent bodies was a KBO.

  5. Biomechanics of the cornea evaluated by spectral analysis of waveforms from ocular response analyzer and Corvis-ST.

    Directory of Open Access Journals (Sweden)

    Sushma Tejwani

    Full Text Available In this study, spectral analysis of the deformation signal from Corvis-ST (CoST and reflected light intensity from ocular response analyzer (ORA was performed to evaluate biomechanical concordance with each other.The study was non-interventional, observational, cross-sectional and involved 188 eyes from 94 normal subjects. Three measurements were made on each eye with ORA and CoST each and then averaged for each device. The deformation signal from CoST and reflected light intensity (applanation signal from ORA was compiled for all the eyes. The ORA signal was inverted about a line joining the two applanation peaks. All the signals were analyzed with Fourier series. The area under the signal curves (AUC, root mean square (RMS of all the harmonics, lower order (LO included 1st and 2nd order harmonic, higher order (HO up to 6th harmonic, CoST deformation amplitude (DA, corneal hysteresis (CH and corneal resistance factor (CRF were analyzed.The device variables and those calculated by Fourier transform were statistically significantly different between CoST and ORA. These variables also differed between the eyes of the same subject. There was also statistically significant influence of eyes (left vs. right on the differences in a sub-set of RMS variables only. CH and CRF differed statistically significantly between the eyes of subject (p<0.001 but not DA (p = 0.65.CoST was statistically significantly different from ORA. CoST may be useful in delineating true biomechanical differences between the eyes of a subject as it reports deformation.

  6. Elementi e relazioni in un sistema di classificazione dei record

    Directory of Open Access Journals (Sweden)

    Maria Mata Caravaca

    2017-05-01

    Full Text Available La costruzione di schemi di classificazione dei record è un tema poco sviluppato a cui la disciplina archivistica ha finora dedicato poca attenzione. Non si tratta di un argomento di facile comprensione, dal momento che gli schemi di classificazione dei record sono gli strumenti principali utilizzati tradizionalmente per l'organizzazione e la gestione dei record. Questo articolo esamina gli elementi presi in considerazione nella costruzione di uno schema di classificazione, così come le modalità attraverso le quali questi elementi sono correlati. Vengono inoltre esaminate le relazioni gerarchiche e non gerearchiche, ed identificate le possibili future direzioni della ricerca su questi temi.

  7. Missionale kerk, missio Dei en kerkverband: ’n Diskussie

    Directory of Open Access Journals (Sweden)

    Griffel van Wyk

    2014-11-01

    focused on recent criticism of the missional church movement in South Africa, probed the underlying role of the missio Dei in the missional church movement and touched on the implications of the missio Dei for inter-church relations. The missio Dei proves to be of much value for fruitful discussion on the emerging and missional church, because it functions as a suitable paradigm of reference and theological enquiry and also seems able to address issues arising within denominations and inter-church relations caused by the emerging church phenomenon.

  8. Jeanne Hersch: una filosofia dei contorni

    Directory of Open Access Journals (Sweden)

    Roberta De Monticelli

    2013-07-01

    Full Text Available A Si tracciano le linee fondamentali del pensiero di Jeanne Hersch (Ginevra, 1910-2000, che concepisce la filosofia come servizio anti-idolatrico nei confronti della trascendenza da un lato, e dall’altro come continua presa di coscienza dei gesti della libertà che fanno irriducibile al dato e insieme profondamente individuata, qui ed ora, la nostra vita. Si mostra come l’ontologia di questa pensatrice sia indissociabile dalla sua estetica, o piuttosto dalla sua teoria del fare umano quale partecipazione finita e incarnata alla creazione. Si mostra il nesso da lei particolarmente sottolineato fra consistenza morale personale e responsabilità del pensiero teorico, sulla base dell’esempio negativo di Heidegger, sostenitore del nazismo. Si discute la netta presa di posizione che Jeanne Hersch assume contro le seduzioni e le liturgie verbali del suo pensiero incantatorio, irresponsabile nei confronti della verità e “radicato nel disprezzo”.

  9. Idraulica dei sistemi fognari dalla teoria alla pratica

    CERN Document Server

    Gisonni, Corrado

    2012-01-01

    La progettazione dei sistemi fognari e dei manufatti in essi presenti richiede un’attenta conoscenza delle leggi che regolano i fenomeni idraulici, con particolare riferimento alle correnti idriche a superficie libera. Partendo dalle nozioni fondamentali dell’Idraulica, il testo intende colmare alcune importanti lacune che ancora caratterizzano la letteratura italiana nel settore e che spesso sono alla base di errori progettuali, con ovvie conseguenze sulla sicurezza dei centri abitati (come testimoniato dai frequenti fenomeni di allagamento che sono stati registrati negli ultimi anni). Il libro è rivolto agli allievi dei corsi di studio nel settore dell’ingegneria Civile ed Ambientale. Particolare interesse è rivolto ai professionisti operanti nel settore della ingegneria idraulica e della pianificazione urbana, per i quali è forte l’esigenza di testi che contengano indicazioni di carattere sia teorico sia pratico, finalizzate alla progettazione di sistemi di drenaggio nei centri abitati.

  10. Sulla ricerca del minimo dei consumi per vetture sportive

    OpenAIRE

    Dolcini, Enrico

    2008-01-01

    La ricerca oggetto di questa tesi, come si evince dal titolo stesso, è volta alla riduzione dei consumi per vetture a forte carattere sportivo ed elevate prestazioni specifiche. In particolare, tutte le attività descritte fanno riferimento ad un ben definito modello di vettura, ovvero la Maserati Quattroporte. Lo scenario all’interno del quale questo lavoro si inquadra, è quello di una forte spinta alla riduzione dei cosiddetti gas serra, ossia dell’anidride carbonica, in linea con quelle ...

  11. LA GESTIONE DEI CREDITI ANOMALI IN TEMPO DI CRISI

    OpenAIRE

    MANUELA GERANIO

    2013-01-01

    L'evoluzione del mercato del credito al dettaglio negli anni più recenti, caratterizzati da una riduzione dei volumi erogati e da un aumento delle anomalie, va evidenziando l'importanza di un approccio proattivo e sempre più business oriented anche nella fase di recupero dei crediti, volto a minimizzare i tempi ed i costi della collection nonché a conservare, dove possibile, la relazione con il cliente.

  12. Synchrotron-based DEI for bio-imaging and DEI-CT to image phantoms with contrast agents

    International Nuclear Information System (INIS)

    Rao, Donepudi V.; Swapna, Medasani; Cesareo, Roberto; Brunetti, Antonio; Akatsuka, Tako; Yuasa, Tetsuya; Zhong, Zhong; Takeda, Tohoru; Gigante, Giovanni E.

    2012-01-01

    The introduction of water, physiological, or iodine as contrast agents is shown to enhance minute image features in synchrotron-based X-ray diffraction radiographic and tomographic imaging. Anatomical features of rat kidney, such as papillary ducts, ureter, renal artery and renal vein are clearly distinguishable. Olfactory bulb, olfactory tact, and descending bundles of the rat brain are visible with improved contrast. - Highlights: ► Distinguishable anatomical structures features of rat kidney and rat brain are acquired with Sy-DEI in planar mode. ► Images of a small brain phantom and cylindrical phantom are acquired in tomography mode (Sy-DEI-CT) with contrast agents. ► Sy-DEI and Sy-DEI-CT techniques provide new source of information related to biological microanatomy.

  13. Status sulle conoscenze dei mammiferi molisani

    Directory of Open Access Journals (Sweden)

    Nicola Norante

    2003-10-01

    Full Text Available Il Molise risulta poco studiato dal punto di vista teriologico e, per colmare almeno in parte tale lacuna, il GMSO si è proposto di raccogliere dati bibliografici e inediti e promuovere qualche progetto. Si riportano sinteticamente dati relativi ad alcune specie. Sciurus vulgaris risulta comune in Prov. di Isernia, più localizzato in quella di Campobasso, presente nelle riserve MAB, nel Parco Naz. d?Abruzzo, Matese e Venafrano, nei pressi della zona ospedaliera di Campobasso ed anche al centro del capoluogo. Hystrix cristata, segnalata fino agli anni anni ?60 a Campomarino è stata trovata di recente (aculei in Alto Molise, sporadiche le segnalazioni nell?agro di S. Croce di Magliano-Colletorto (CB. Canis lupus ha recentemente allargato il suo areale raggiungendo anche siti in collina (per l?immissione dei Daini. Presente oltre che nel PNA, in tutta la Prov. di Isernia, Matese, montagna di Frosolone fino a Castropignano-Casalciprano. Preoccupante invece il randagismo canino verso il quale è auspicabile prendere dei provvedimenti. Ursus arctos è in aumento con massimi in Val di Mezzo, Val Fiorita, Val Pagana, M .te Marrone ed in tutto il gruppo delle Mainarde; fuori dal PNA è sempre più frequente: Matese, Carpinone e recentemente (27.04.03 una coppia in Valle del Sangro a S. Angelo in Pesco (IS. Nel 1995 una femmina è stata investita dal treno nei pressi di Carpinone (IS. Lutra lutra invece è diminuita rispetto al passato. La si incontrava fino agli anni ?70/80 fino alla foce dei fiumi Trigno, Biferno e T. Saccione. Attualmente è segnalata in prov. di Isernia (es. Venafrano, Matese, Montagna di Frosolone. Felis silvestris è presente soprattutto in Prov. di Isernia dove è segnalato in 38 Comuni. In quella di Campobasso appare più localizzato a nord e nel Matese. Riguardo Lynx lynx pare che qualche soggetto sia stato osservato nell?area limitrofa al P.N.A. dove è stata

  14. L'amministrazione dei culti in Francia

    Directory of Open Access Journals (Sweden)

    Anna Sammassimo

    2013-10-01

    Full Text Available Contributo sottoposto a valutazioneSOMMARIO: 1. Introduzione - 2. La Francia e l’amministrazione dei culti - 3. Le bureau central des cultes: 3.1 - Le origini: dal Consolato al periodo imperiale; 3.2 - dalla Prima alla Seconda Restaurazione; 3.3 - dalla Monarchia di luglio alla Legge sulla separazione; 3.4 - le competenze - 4. Le bureau des cultes des départements du Bas-Rhin, du Haut-Rhin et de la Moselle: 4.1 - la specificità dell’Alsazia-Mosella; 4.2 - le origini del bureau; 4.3 - le competenze - 5. Il conseiller pour les affaires religieuses: 5.1 - le origini; 5.2 - la posizione fuori dagli schemi; 5.3 - le competenze – 6. Conclusioni.  Abstract:The administration of cults in FranceThe expression “Administration of cults” born in France in the 19th century, when the 1801 Conordat made the cults into a public service and the cult's clerics a corp of nominated functionaries. Thus administration referred precisely to that branch of the civil service which under the flourishing Concordat concerned itself with the problems of claims from and requirements of the religious cults in French territories. Our paper means to trace France's administration of cults from its beginnings to its precise modern competences and functions. We wish to show how this administrative structure has been and still is an important apparatus for interpretation and even for 'liberal administration' of the Law as regards the separation of State and Church and the very concept of laïcité.Key words: France, administration, cults, laïcité

  15. La guerra dei poveri (novela, fragmento

    Directory of Open Access Journals (Sweden)

    Nuto Revelli

    2013-07-01

    Full Text Available NUTO REVELLI (Cuneo, 1919-2004, enviado al desastroso frente ruso en 1942 como teniente de la División Tridentina, a su vuelta a Italia decidió abandonar el ejército regular y unirse a la resistencia en la región del Cuneo, donde fundó la Compagnia Rivendicazione Caduti y asumió el mando de las brigadas de los valles Vermenagna y Stura. Ambas experiencias, el frente ruso, y sobre todo, su experiencia como partisano, son los dos ejes en torno a los cuales se ha organizado su narrativa, centrada en dejar constancia de la guerra y de dar voz a soldados, campesinos y rebeldes en obras de la relevancia de Mai tardi. Diario di un alpino in Russia (1946, L'ultimo fronte. Lettere di soldati caduti o dispersi nella II guerra mondiale (1971 o la más reciente Le due guerre. Guerra fascista e guerra partigiana, publicada póstumamente en 2005 en Einaudi, como la mayor parte de su producción. Aunque es sin duda la autobiográfica La guerra dei poveri (1962 la que ha gozado de un mayor reconocimiento, especialmente por la inmediatez del mensaje y el cuidado en los detalles del día a día partisano y de los caracteres, todos ellos reales, que desfilan por sus páginas. Escrita en forma de diario entre el 16 de enero de 1943, día en que inicia sus anotaciones sobre la retirada del frente ruso a orilla del Don  y el 30 de abril de 1945, fecha en que cierra el diario tratando la liberación del Cuneo, el siguiente fragmento consta de las entradas comprendidas entre el 24 de abril y el 4 de mayo de 1944. Traducción de Sonia Mota Pérez.

  16. Preliminary attempt on maximum likelihood tomosynthesis reconstruction of DEI data

    International Nuclear Information System (INIS)

    Wang Zhentian; Huang Zhifeng; Zhang Li; Kang Kejun; Chen Zhiqiang; Zhu Peiping

    2009-01-01

    Tomosynthesis is a three-dimension reconstruction method that can remove the effect of superimposition with limited angle projections. It is especially promising in mammography where radiation dose is concerned. In this paper, we propose a maximum likelihood tomosynthesis reconstruction algorithm (ML-TS) on the apparent absorption data of diffraction enhanced imaging (DEI). The motivation of this contribution is to develop a tomosynthesis algorithm in low-dose or noisy circumstances and make DEI get closer to clinic application. The theoretical statistical models of DEI data in physics are analyzed and the proposed algorithm is validated with the experimental data at the Beijing Synchrotron Radiation Facility (BSRF). The results of ML-TS have better contrast compared with the well known 'shift-and-add' algorithm and FBP algorithm. (authors)

  17. ANOMALIE RESUDUE E DERIVATE SECONDE NELLA INTERPRETAZIONE DEI DATI GRAMIMETRICI

    Directory of Open Access Journals (Sweden)

    G. TRIBALTO

    1956-06-01

    Full Text Available L'eliminazione dell'effetto del campo gravimetrico regionale dall'anomalia
    di Bouguer è uno dei problemi più discussi nell'interpretazione
    dei rilevamenti geofisici.
    Esso consiste nel decomporre l'anomalia di Bouguer nelle sue due
    parti componenti, anomalia residua ed anomalia regionale, allo scopo
    di individuare le strutture locali.
    L'anomalia regionale è dovuta all'effetto delle strutture profonde
    e di grande estensione; le curve isoanomale relative a tale campo hanno
    generalmente un andamento regolare e quindi un gradiente non
    variabile rapidamente.

  18. Intensificazione del significato tramite l’uso dei prefissi e dei suffissi superlativi nel linguaggio giovanile e nello stile femminile

    Directory of Open Access Journals (Sweden)

    Małgorzata Berezowska

    2017-07-01

    Full Text Available L’uso dei prefissi e dei suffissi superlativi, oltre alla loro funzione di base in quanto indicatori delle dimensioni dell’oggetto descritto o dell’intensità delle sue proprietà, può servire a esprimere l’atteggiamento del parlante nei confronti della realtà extralinguistica. Questi elementi morfologici svolgono non solo la loro funzione di base, ma possono essere utilizzati nella loro funzione secondaria: quella di trasmettere le emozioni dell’autore dell’enunciato. Il materiale linguistico analizzato nell’articolo, tratto dai forum di discussione, riflette le tendenze tipiche dello stile femminile e del linguaggio giovanile.

  19. Implicazioni della regolazione dei mercati dei derivati sulle materie prime negli USA e nell’Unione Europea

    Directory of Open Access Journals (Sweden)

    Jayati Ghosh

    2011-12-01

    Full Text Available Implicazioni della regolazione dei mercati dei derivati sulle materie prime negli USA e nell’Unione EuropeaAbstract: The argument for effective financial regulation to curb financial activity and associated volatility in primary commodity markets is now more compelling than ever, in the context of the renewed increase in food prices. However, as in much other financial regulation, the devil is in the detail. This paper considers recent patterns in global food markets and discusses some of the implications of recent moves to regulate financial activity in commodity futures markets in the US and the EU. Specific regulatory issues are considered and alternative strategies are considered.

  20. IMMIGRATION AND IDENTITY IN L'ALBERO DEI DESTINI SOSPESI

    African Journals Online (AJOL)

    User

    culture-crossed lovers' feelings and fears that intersperse their process of acculturation ultimately result in changes to their self-categorisation and identity. L'albero dei destini .... The absence of women is highly significant in the film, although the .... This is reinforced by the political use of information by the media – see.

  1. The Athletae Dei: Missing the Meaning of Sport.

    Science.gov (United States)

    Hoffman, Shirl J.

    By making virtue of ascesis or self-discipline in their sport, the athlete evangelists (the "athletae-Dei"), unwittingly rob sport of its fundamental theological significance. These proponents of an evangelical brand of protestant theology have shifted drastically from an anti-sport stance of a century ago to a position that not only…

  2. Augustinus' geschrift 'De stad van God' (De ciuitate Dei): Een ...

    African Journals Online (AJOL)

    Test

    7 juni 2011 ... als doctor litterarum sacrae scripturae. Twee mooie titels, maar voor wie goed leest en hoort zeggen ze in feite hetzelfde. Graag wil ik daarom van beide leraren nog veel leren. Inleiding. In het enorme œuvre van Augustinus wordt zijn geschrift De ciuitate Dei ofwel De stad van God, gewoonlijk samen met ...

  3. Radioactivity level and toxic elemental concentration in groundwater at Dei-Dei and Kubwa areas of Abuja, north-central Nigeria

    Science.gov (United States)

    Maxwell, O.; Wagiran, H.; Lee, S. K.; Embong, Z.; Ugwuoke, P. E.

    2015-02-01

    The activity concentrations of uranium and toxic elements in Dei-Dei borehole, Kubwa borehole, Water Board and hand-dug well water samples in Abuja area were measured using inductively coupled plasma mass spectrometry (ICP-MS) system. The results obtained were used to calculate human radiological risk over lifetime consumption by the inhabitants in the area. The activity concentrations of 238U in all the water supplies for drinking ranges from 0.849 mBq L-1 to 2.699 mBq L-1 with the highest value of 2.699 mBq L-1 noted at Dei-Dei borehole whereas the lowest value of 0.849 mBq L-1 was noted in Kubwa borehole. The highest annual effective dose from natural 238U in all the water samples was found in Dei-Dei borehole with a value of 8.9×10-5 mSv y-1 whereas the lowest value was noted in Kubwa borehole with a value of 2.8×10-5 mSv y-1. The radiological risks for cancer mortality were found distinctly low, with the highest value of 1.01×10-7 reported at Dei-Dei borehole compared to Kubwa borehole with a value of 3.01×10-8. The cancer morbidity risk was noted higher in Dei-Dei borehole with a value of 1.55×10-7 whereas lower value of 4.88×10-9 was reported in Kubwa borehole. The chemical toxicity risk of 238U in drinking water over a lifetime consumption has a value of 0.006 μg kg-1 day-1 in Dei-Dei borehole whereas lower value of 0.002 μg kg-1 day-1 was found in Kubwa borehole. Measured lead (Pb) and chromium (Cr) concentrations reported higher in Water Board compared to Dei-Dei and Kubwa borehole samples. Significantly, this study inferred that the 238U concentrations originate from granitic strata of the tectonic events in the area; thus, there was a trend of diffusion towards north to south and re-deposition towards Dei-Dei area.

  4. Radioactivity level and toxic elemental concentration in groundwater at Dei-Dei and Kubwa areas of Abuja, north-central Nigeria

    International Nuclear Information System (INIS)

    Maxwell, O.; Wagiran, H.; Lee, S.K.; Embong, Z.; Ugwuoke, P.E

    2015-01-01

    The activity concentrations of uranium and toxic elements in Dei-Dei borehole, Kubwa borehole, Water Board and hand-dug well water samples in Abuja area were measured using inductively coupled plasma mass spectrometry (ICP-MS) system. The results obtained were used to calculate human radiological risk over lifetime consumption by the inhabitants in the area. The activity concentrations of 238 U in all the water supplies for drinking ranges from 0.849 mBq L −1 to 2.699 mBq L −1 with the highest value of 2.699 mBq L −1 noted at Dei-Dei borehole whereas the lowest value of 0.849 mBq L −1 was noted in Kubwa borehole. The highest annual effective dose from natural 238 U in all the water samples was found in Dei-Dei borehole with a value of 8.9×10 −5 mSv y −1 whereas the lowest value was noted in Kubwa borehole with a value of 2.8×10 −5 mSv y −1 . The radiological risks for cancer mortality were found distinctly low, with the highest value of 1.01×10 −7 reported at Dei-Dei borehole compared to Kubwa borehole with a value of 3.01×10 −8 . The cancer morbidity risk was noted higher in Dei-Dei borehole with a value of 1.55×10 −7 whereas lower value of 4.88×10 −9 was reported in Kubwa borehole. The chemical toxicity risk of 238 U in drinking water over a lifetime consumption has a value of 0.006 μg kg −1 day −1 in Dei-Dei borehole whereas lower value of 0.002 μg kg −1 day −1 was found in Kubwa borehole. Measured lead (Pb) and chromium (Cr) concentrations reported higher in Water Board compared to Dei-Dei and Kubwa borehole samples. Significantly, this study inferred that the 238 U concentrations originate from granitic strata of the tectonic events in the area; thus, there was a trend of diffusion towards north to south and re-deposition towards Dei-Dei area. - Highlights: • The estimation of human radiological risk over lifetime consumption. • Determination of radiological risks. • The annual effective dose of 238 U in drinking

  5. Il mondo dei quanti la fisica quantistica per tutti

    CERN Document Server

    Ford, Kenneth W

    2006-01-01

    L'autore spiega come le leggi che governano l'enormemente piccolo e l'enormemente rapido sfidino il senso comune e mettano alla prova l'intelletto al limite delle sue possibilità. Ford introduce alle grandi idee di una teoria - la fisica quantistica - che continua a rimanere misteriosa nonostante i numerosi successi: la granularità (la materia e alcune sue proprietà, come l'energia, sono "grumose"), il dualismo onda-particella, il principio di indeterminazione, la natura dei bosoni e dei fermioni, il principio di sovrapposizione e la non separabilità (il fatto che un atomo possa trovarsi simultaneamente in due o più stati di moto diversi).

  6. Il ‘volontariato’ dei richiedenti asilo in Italia

    Directory of Open Access Journals (Sweden)

    Martina Pasqualetto

    Full Text Available Riassunto L'articolo analizza la politica pubblica italiana che prevede il coinvolgimento dei richiedenti asilo in attività di 'volontariato' a favore delle amministrazioni locali per calmare il malcontento popolare causato dalla loro presunta inattività. In primo luogo l'autrice mette in discussione l'efficacia di tale policy e ne destruttura il discorso governativo mettendone in luce le mistificazioni. Mediante una ricerca esplorativa ispirata alla grounded theory si dimostra inoltre che la reale natura delle attività promosse risiede nel lavoro gratuito e che esse veicolano un messaggio di simbolica e percepita utilità dei profughi che impatta negativamente sull'immaginario collettivo rispetto al tema del diritto d'asilo.

  7. Fondamenti di Meccanica e Biomeccanica Meccanica dei corpi rigidi articolati

    CERN Document Server

    Picasso, Bruno

    2013-01-01

    Nel presente volume vengono presentati in forma estesa e rigorosa i principi della Meccanica dei corpi rigidi, il cui apprendimento richiede solo le conoscenze di base della Fisica, studiata nella Scuola Superiore. La quasi totalità delle applicazioni, degli esempi e degli esercizi presentati si riferisce all’analisi del movimento e degli stati di sforzo nel corpo umano. Le applicazioni svolte con Matlab e Simulink richiedono una conoscenza elementare di programmazione in questi ambienti. Nel testo si privilegia l’approccio applicativo, perché la materia rimanga viva nella successiva vita professionale del lettore. Il testo si rivolge principalmente agli studenti dei Corsi di Biomeccanica, professati nei Corsi di Studio di base in Bioingegneria, in Scienze Motorie e nelle Scuole di Specializzazione in Ortopedia. Per l’estensione della materia trattata e per le applicazioni, il testo può essere utilmente adottato anche nei Corsi di Laurea specialistica in Bioingegneria.

  8. Mario Soldati voyageur dans La messa dei villeggianti

    OpenAIRE

    Alexandre, Denise

    2015-01-01

    Sont examinés les textes appartenant au recueil La messa dei villeggianti, que Mario Soldati a publié à l’âge de cinquante-deux ans. Occasion tour à tour de références artistiques, de pèlerinages littéraires, de souvenirs de gastronome et même de réminiscences de séducteur déçu, ces récits de voyage laissent percer les états d’âme d’un écrivain s’estimant vieillissant qui s’interroge sur le sens de sa vie. Sono presi in esame i testi appartenenti alla raccolta La messa dei villeggianti, pu...

  9. The missio Dei as context for a ministry to refugees

    Directory of Open Access Journals (Sweden)

    Diniz R. Soares

    2017-02-01

    Full Text Available The current global escalation of refugees and involuntary migration, due to the effects of war and world disasters, makes it imperative to devise an effective approach to care for refugees. This article, therefore examines the problem of displacement from the perspective of missio Dei. It presents God’s active involvement in his creation, recreating it and providing particular care for the vulnerable and refugees.

  10. 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...

  11. L’ACQUISIZIONE DEI SEGNALI DISCORSIVI IN ITALIANO L2

    Directory of Open Access Journals (Sweden)

    Elisabetta Jafrancesco

    2015-07-01

    Full Text Available Il contributo presenta i risultati di una ricerca sull’acquisizione dei segnali discorsivi (SD in italiano L2, condotta su un corpus di parlato di studenti universitari in mobilità accademica, presenti nell’università di Firenze e inseriti in percorsi formativi di italiano L2 presso il Centro Linguistico di Ateneo. Il principale obiettivo dello studio è indagare l’italiano di stranieri relativamente a questo tratto specifico al fine di individuare eventuali sequenze acquisizionali, contribuendo a delineare lo sviluppo della competenza sociopragmatica degli apprendenti nei livelli di competenza proposti nel Quadro comune europeo di riferimento per le lingue (QCER Si analizza, in particolare, l’uso dei SD nel parlato dialogico degli informanti nei Livelli basico, indipendente e competente del QCER – con riferimento al modello tassonomico dei SD proposto da Bazzanella nella Grande grammatica italiana di consultazione (1995, integrato, in relazione allo specifico contesto, con nuove funzioni – evidenziando i principali macrofenomeni emersi, con l’intento inoltre di riflettere su come i dati dell’acquisizione dell’italiano L2 possono rappresentare un punto di riferimento per la definizione di percorsi formativi coerenti con i processi naturali di sviluppo della competenza.Acquisition of discourse markers in Italian L2The paper presents the results of a study on the acquisition of discourse markers (SD in Italian L2 students, conducted on a corpus of spoken language by university students at the University of Florence who attended Italian L2 language course at the University Language Center. The main objective of the study was to investigate the Italian of foreigners in relation to this specific trait in order to identify possible acquisitional sequences, helping shape the development of learners' socio-pragmatic competence levels proposed in the Common European Framework of Reference for Languages (CEFR. In particular, we

  12. Sorveglianza della circolazione ambientale dei poliovirus nel Lazio

    Directory of Open Access Journals (Sweden)

    A.M. Patti

    2003-05-01

    Full Text Available Ancora oggi in tutto il mondo il vaccino antipolio più utilizzato è l’OPV costituito da virus viventi attenuati che vengono eliminati per un periodo di tempo variabile dal soggetto vaccinato. L’immissione di virus vaccinali nell’ambiente è stata in passato, e lo è tuttora nelle zone endemiche, estremamente importante per assicurare e la competizione con il poliovirus selvaggio e una immunità di gregge. Nei paesi polio-free, ed in futuro in tutto il mondo, la circolazione di virus vaccinali potrebbe viceversa diventare un punto critico in grado di inficiare i risultati dell’eradicazione. Infatti i virus vaccino derivati, replicando, retromutano verso la neurovirulenza e/o accumulano mutazioni che alla fine conferiscono loro caratteristiche del tutto diverse dai ceppi parentali; inoltre possono anche ricombinarsi con il selvaggio o con altri enterovirus assumendo caratteristiche di virulenza e di trasmissibilità interumana che emergono con lo scoppio di focolai epidemici. Obiettivo del presente progetto è stata la valutazione della circolazione dei poliovirus e degli eventuali virus vaccino derivati in matrici ambientali nella regione Lazio nel periodo 1996-2002. Metodo: sono stati analizzati 26 campioni di liquami e 36 campioni di acque superficiali contaminate da liquami. Le particelle virali sono state concentrate mediante ultra filtrazione tangenziale (10.000 NMWR – Millipore. I concentrati sono stati seminati su cellule BGM ed L20B. I virus isolati sono stati identificati con antisieri specifici (RIUM e sui poliovirus, presso l’ISS, sono stati effettuati la differenziazione intratipica, il sequenziamento della regione VPI/2A, il sequenziamento della regione 5’ NCR e la regione codificante la polimerasi virale. Risultati e conclusioni: sono stati isolati complessivamente 6 poliovirus di cui 4 da acque superficiali. I virus erano tutti Sabin-kike e retromutati ma non ricombinanti. I dati ottenuti sottolineano l

  13. L’AZIONE DI CANCELLAZIONE - TUTELA DEI DIRITTI TAVOLARI

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    Zrinka Radić

    2017-01-01

    Full Text Available Il titolare di un diritto tavolare, leso dall’iscrizione a favore di altro soggetto, al fi ne di tutelare il proprio diritto è autorizzato a pretendere la cancellazione di qualsiasi iscrizione che lo offenda ed a ripristinare nel libro fondiario lo stato precedente. Se l’iscrizione di un diritto tavolare a favore di altro soggetto sia o no fondata, verrà stabilito dal tribunale in sede contenziosa. L’autore del lavoro si occupa della questione della legittimazione attiva e passiva e dei termini quali presupposti incontrovertibili volti alla presentazione della domanda di cancellazione. Si disaminano le questioni che sono problematiche in giurisprudenza ed in dottrina. Precisamente: la valutazione della legittimazione attiva, le questioni riguardanti dunque l’individuazione di coloro che in qualità di «lesi nel proprio diritto tavolare» possano intraprendere l’azione di cancellazione e la questione circa i tipi di iscrizione in occasione delle quali si possa giungere ad una tale lesione. Ancora, si valuta se l’attore debba in caso di azione di cancellazione provare il suo diritto sostanziale e quali eccezioni possa sollevare nell’azione. Al centro dell’attenzione v’è anche la questione della legittimazione passiva e dei termini quali presupposti incontrovertibili ai fi ni della presentazione della domanda di cancellazione; come pure l’interrogativo se l’azione di cancellazione sia giustifi cata soltanto nel caso di un’iniziale nullità del titolo o se sia suffi ciente anche una nullità successiva.

  14. CONTRIBUTO AL DIBATTITO SUL PRINCIPIO DI EGUAGLIANZA DEI MEZZI PROCESSUALI

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    Dejan Bodul

    2017-01-01

    Full Text Available Il principio di eguaglianza dei mezzi processuali presuppone l’esistenza di una ragionevole possibilità in capo ad entrambe le parti di esporre e comprovare i fatti, in un modo che non metta alcuna delle parti in posizione sfavorevole rispetto alla controparte (caso LB INTERFINANZ A.G. v. Croazia, sentenza del 27.03.2008, riscorso n. 29549/04.. Un tanto rappresenta, nella sua espressione di equilibrio tra le parti processuali, uno degli elementi costitutivi del diritto ad un giusto processo. Tuttavia, con l’entrata in vigore della (nuova legge fallimentare (GU, n. 71/15. in avanti LF la questione dell’eguaglianza sul piano processuale diviene nuovamente di attualità. Precisamene, la LF ha mantenuto una soluzione in base alla quale il creditore ha la possibilità di instaurare il procedimento fallimentare qualora renda probabile l’esistenza del proprio credito e la sussistenza del fondamento fallimentare così che è trattenuto ed eccepito il provvedimento in base al quale la probabilità della sussistenza del credito non può venire dimostrata dal creditore sulla base di una decisione dell’autorità giudiziale o amministrativa che non sia passata in giudicato. Posto che esistono diverse soluzioni con riguardo alle questioni illustrate, gli autori si limiteranno a delle constatazioni di carattere generale sulla base di esperienze comparate, senza una dettagliata disamina delle variegate e peculiari soluzioni giuridiche straniere. Nel lavoro si disaminano sia le implicazioni pratiche che quelle teoriche della soluzione giuridica di diritto positivo, analizzando la giurisprudenza della Corte europea dei diritti dell’uomo nei procedimenti in base all’art. 6 (diritto ad un giusto processo della Convenzione europea per la salvaguardia dei diritti dell’uomo e delle libertà fondamentali, poiché partiamo dal presupposto che le conoscenze sul punto possono essere fondamentali per la comprensione dell’oggetto dell’indagine condotta

  15. Piano dei Servizi. Proposal for Contents and Guideline

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    Roberto Gerundo

    2014-05-01

    Full Text Available As an endless melting pot of experimentation and innovation, cities must reorganize and retrain compared to the growing new needs. In the light of the actual urban debate, it can be useful to do an in-depth study. In fact, the quality of urban life and collective well-being cannot be separated from the identification of a network of public services and facilities, that organizes and structures the city. That network is not resolved in the themes of pre-school and compulsory education, public interest, green spaces, car parks and public interest, but rather has a wider variety of types. Noting the failure of attempts to define, a priori, a quantity of universally valid services, it is necessary to rethink the ways and criteria of most of the infrastructural facilities. The "Piano dei Servizi" is the tool for the implementation of a concrete policy of services for public interest, and it means the transition between a planning standard, in terms of quantity, in a standard that meets quality requirements. It represents a specific section of the urban development plan, which has to consider problems and shortcomings, and try to solve them by finding opportunities which physical locations offer. In this way a planning standard is not configured as an abstract quantity, but as the material composition of the urban plan, which results in a land use and land development proposal.

  16. Micromammiferi dei piani carsici di Colfiorito (Perugia - Macerata

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    A. Gaggi

    2003-10-01

    Full Text Available È stata condotta la prima indagine qualitativa sulla microteriofauna del Parco Regionale di Colfiorito (PG e dell?intero sistema dei piani carsici, che si sviluppano tra 750 e 800 m. s.l.m. sullo spartiacque appenninico umbro-marchigiano centro- meridionale. L?area di studio si estende per 5651,27 ha con un?escursione altitudinale da 750 a 1440 m s.l.m., interessando la palude omonima e alcuni territori limitrofi. Si è indagato nelle seguenti categorie ambientali: palude (fascia esterna, prato umido e torbiera, pascolo, bosco di latifoglie e zone antropizzate. Tra giugno 2000 e maggio 2001 sono state effettuate 16 uscite (4 per stagione, utilizzando i seguenti metodi: a trappolamento incruento, con trappole ed esche di vario tipo e successivo rilascio dei selvatici catturati, per 616 notti trappola, 38 catture, 6 specie: Clethrionomys glareolus, Microtus savii, Apodemus flavicollis, A. sylvaticus, Rattus norvegicus e Mus domesticus; b raccolta di boli. La mancata reperibilità di siti di Barbagianni Tyto alba e di Allocco Strix aluco ha portato a recuperare ed analizzare 65 borre di Albanella reale Circus cyaneus e 13 di Albanella minore C. pygargus, con il contenuto di microroditori rispettivamente del 77,3% e del 10%. In entrambe le diete è apparsa interessante la presenza di crani riferibili a Microtus cfr. subterraneus. Il metodo ha fornito, contemporaneamente, nuove informazioni sull?alimentazione di queste albanelle in Italia; c ricerca di resti di pasto, nidi e tane, impronte, carcasse. Ha accertato le specie Erinaceus europaeus e Sciurus vulgaris oltre al genere Talpa; d ricerca bibliografica, museografica e fotografica. Ha accertato Sorex minutus, S. samniticus, Neomys fodiens, Glis glis,

  17. LA CORRETTA VALORIZZAZIONE DEI RIFIUTI AGRICOLI ED AGROINDUSTRIALI

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    Francesco Saverio Nesci

    2014-12-01

    Full Text Available Farming and agro-industrial waste can represent a resource when destined to energy production and they can contribute to reduce greenhouse gas emission, to improve energetic efficiency and increase renewable energies. 6 stations are already working in Calabria for agro-zootechnical biomasses and agro-industrial waste transformation, in compliance with 91/676/CEE, Nitrates Directive, then D.L. 152/99 and D.M. 7 April 2006, redefined by D.M. 6-7-2012 It reduced incentives, with the aim of implementing small sized stations powered by recyclable byproducts, which are easier to manage especially in the form of consortium by medium and small sized companies that would otherwise be excluded from the market. An appropriate use of pruning waste would also mean turning a problem into an opportunity if, instead of burning it and producing high levels of CO2 (as forbidden by D.L. “terra dei fuochi” it could be destined to produce a new kind of power source, biochar, with a carbon negative function. Concerning the market of carbon credits derivable from pruning waste and from the production of more than 130.000 t of biochar (which, differently from the forestry sector, hasn’t been accepted in farming yet, the potential wealth on the regional territory could vary from 5 to 11 million € according to the set price. Establishing a more competitive and sustainable source of energy is one of the most important challenges that our Country has to face today. This sector plays a key role in the economic development of the Country, not only as a distinctive feature of low cost energy production, limited impact on environment and high utilization, but also as an element of growth per se, with a boost in ecologic economy thanks to a predominant use of renewable resources, recycling and curbing domestic or industrial waste, according to Green Economy parameters.

  18. The imago Dei Weltanschauung as narrative motif within the Corinthian correspondence

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    Jacobus (Kobus Kok

    2016-03-01

    Full Text Available This article reflects on the doctrine of humanity to explore that God created humankind in his image and likeness, and this means that all human beings have an inherent capacity to know the difference between good and bad, and between right and wrong. Thus, all human beings have an innate ability to be ethical, as the God who created them is good, and so becomes the source of their ethics. This article title highlights the interrelationships between identity, ethics, and ethos. These three related analytical categories, within the New Testament, show the necessity for an interdisciplinary approach in treating questions of the origin of humanity. This article incorporates reflections in the studies of anthropology, philosophy, and theology and draws from the writings of Apostle Paul, in his Corinthian Correspondence, as he instructed them on how they ought to relate, and what would be their roles within the broader scope of God�s original intention for humanity. In this attempt, he made reference to the anthropological identity of the imago Dei, and he shows that the perfect expression of the imago Dei is Christ Jesus; thus, this is the image they ought to emulate. Therefore, this article investigates �The imago Dei weltanschauung as narrative motif within the Corinthian correspondence�.Intradisciplinary and/or interdisciplinary implications: This research gives the perspective of the presupposition of the imago Dei as presented in the New Testament as the framework of understanding ethics, as it appears within the formation of an anthropological horizon. In relation to accepting the message of the New Testament, this article shows how the imago Dei worldview underpins Pauline ethics and can serve as a framework of understanding an anthropological ethical paradigm.Keywords: Imago Dei; Corinthian; Paul

  19. [Application research of DEI technique based on synchrotron X-ray source in imaging rabbit eyeball in vitro].

    Science.gov (United States)

    Yin, Hong-xia; Huang, Zhi-feng; Wang, Zhen-chang; Liu, Zhao-hui; Li, Yong; Zhu, Pei-ping

    2010-03-23

    To study the application of DEI technique in imaging the small structures of rabbit eyeball. DEI technique was used to image the eyeball of New Zealand white rabbit in vitro. The experiments were performed using beamline 4W1A at the topography station of Beijing Synchrotron Radiation Facility (BSRF). DEI image showed clearly the fine structures of the rabbit eyeball, such as the transparent cornea, the sclera, the ciliaris, and the ciliary body. DEI is a new X-ray imaging modality which achieves high contrast and spatial resolution. It also showed obvious effect of edge enhancement. DEI has good potential in observing the micro-structures of eyeballs and other small organs.

  20. Changes in intraocular pressure values measured with noncontact tonometer (NCT), ocular response analyzer (ORA) and corvis scheimpflug technology tonometer (CST) in the early phase after small incision lenticule extraction (SMILE).

    Science.gov (United States)

    Shen, Yang; Su, Xiangjian; Liu, Xiu; Miao, Huamao; Fang, Xuejun; Zhou, Xingtao

    2016-11-18

    Corneal biomechanical properties are always compromised after corneal refractive surgeries thus leading to underestimated intraocular pressure (IOP) that complicates the management of IOP. We investigated the changes in postoperative baseline of IOP values measured with noncontact tonometer (NCT), ocular response analyzer (ORA) and corvis scheimpflug technology (CST) in the early phase after small incision lenticule extraction (SMILE). Twenty-two eyes (-6.76 ± 1.39D) of 22 moderate and high myopes, (28.36 ± 7.14 years, 12 male and 10 female) were involved in this prospective study. IOP values were measured using a non-contact tomometer (NCT-IOP), an ocular response analyzer (corneal-compensated IOP, IOPcc and Goldmann-correlated IOP, IOPg) and a Corvis scheimpflug technology tonometer (CST-IOP) preoperatively, at 20 min and 24 h, postoperatively. Repeated measures analysis of variance (RM-ANOVA), Pearson's correlation analysis and multiple linear regression models (stepwise) were performed. Cut-off P values were 0.05. Except for IOPcc, NCT-IOP, IOPg, and CST-IOP values significantly decreased after SMILE procedure (All P values 0.05). Multiple linear regression models (stepwise) showed that the practical post-operative IOP value was the main predictor of the theoretical post-operative NCT-IOP, IOPcc and IOPg values (all P values <0.001). The postoperative applanation time 1 (AT1) value (B = 8.079, t = 4.866, P < 0.001), preoperative central corneal thickness (CCT) value (B = 0.035, t = 2.732, P = 0.014) and postoperative peak distance (PD) value (B = 0.515, t = 2.176, P = 0.043) were the main predictors of the theoretical post-operative CST-IOP value. IOP values are underestimated when assessed after SMILE by using NCT-IOP, IOPg and CST-IOP. The practical postoperative IOPcc value and theoretical post-operative CST-IOP value may be more preferable for IOP assessment in the early phase after SMILE. Current Controlled

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

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    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. 

  2. L’enigma dei raggi cosmici le più grandi energie dell’universo

    CERN Document Server

    De Angelis, Alessandro

    2012-01-01

    Grazie ad avventurosi studi fu possibile dimostrare un secolo fa che parte della radiazione naturale che si osserva sulla Terra è di natura extraterrestre: era la scoperta dei cosiddetti “raggi cosmici”, particelle che arrivano da misteriosi acceleratori nell’universo, probabilmente buchi neri supermassicci e resti di supernova, a energie anche centinaia di milioni di volte di quelle a cui riusciamo a produrle con i più potenti acceleratori della Terra. A cent’anni dalle prime scoperte questo libro si propone, con l’aiuto di documenti scoperti recentemente, di raccontare la vera storia di questa appassionante avventura scientifica e le frontiere dell'esplorazione dei raggi cosmici.

  3. Aspetti tributari dei crediti d’impresa contabilizzati secondo gli Ias/Ifrs: prime riflessioni sistematiche

    OpenAIRE

    A. CONTRINO

    2011-01-01

    1. La disciplina dei crediti d’impresa nei principi contabili internazionali. – 1.1. Costo ammortizzato, valore di presumibile realizzo e «perdite da valutazione». – 1.2. Derecognition, «realizzo» ai fini IAS/IFRS e «perdite da cancellazione». – 2. I nuovi termini di rilevanza fiscale dei crediti IAS/IFRS in forza del principio di derivazione «rafforzata». – 2.1. Sui confini dell’area di determinazione dell’imponibile riservata dall’art. 83 ai principi contabili internazionali. – 2.2. Il nuov...

  4. Prime note sulla tutela penale dei culti nei Paesi dell’Est Europa

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    Giovanni Cimbalo

    2011-05-01

    Full Text Available Testo della relazione tenuta al Convegno “La Carta e la Corte” (Ferrara, 27 ottobre 2007 destinata alla pubblicazione negli Atti. SOMMARIO: 1. Alcune considerazioni preliminari sullo status delle Confessioni religiose nei paesi dell’Est Europa - 2. I nuovi orientamenti del diritto penale nell’Est Europa - 3. Le norme statali in materia di tutela penale dei culti e del sentimento religioso. 3. Le norme penali relative ai culti e a al sentimento religioso prima del 1992 nei Paesi dell’Est Europa - 4. Tipologie e tecniche legislative di tutela penale dei culti dopo il 1992 nei Paesi dell’Est Europa - 5. Alcune sommarie considerazioni.

  5. I nuovi criteri di valutazione dei terreni in seguito al regolamento spagnolo per la valutazione dei terreni del 2011: l’oggettivazione delle aspettative edificatorie nel territorio rurale

    Directory of Open Access Journals (Sweden)

    Ana Maria De La Encarnación Valcárcel

    2013-06-01

    Full Text Available Il regime di valutazione dei terreni ha subito una delle sue più importanti modifiche ad opera della Legge sui Suoli del 2008 e del relativo Regolamento del 2011. Secondo il cosiddetto principio di oggettività, che definisce tutti i metodi fissati per le nuove "situazioni di base" dei terreni, ed in base al prescritto divieto di prendere in considerazione le aspettative edificatorie derivanti dal rilascio di una concessione edilizia, è facilmente desumibile l’esistenza di circostanze, che non sono una conseguenza naturale degli investimenti effettuati per il bene da parte del proprietario. Questo è in contrasto con lo spirito della Legge sui Suoli in vigore, enunciato nella Relazione Esplicativa.

  6. Borges, Ariosto e la vita segreta dei personaggi minori

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    Marco Dorigatti

    2013-12-01

    Full Text Available Inteso quale omaggio a Emilio Bigi, sia pure indiretto, lo studio prende spunto da un’intervista, tuttora inedita, rilasciata nel 1984 dallo scrittore argentino Jorge Luis Borges, in cui aveva citato, credendoli ariosteschi, dei versi che per lui, giunto in età ormai avanzata, erano diventati, più che un motto, una metafora di vita. Poco importa che, come verrà chiarito vagliando la loro storia e le relative fonti, quei versi, facenti capo alla misteriosa figura di un personaggio saraceno, Alibante di Toledo, in realtà appartenessero all’officina poetica di Francesco Berni: essi vengono ciò nondimeno assunti quale filo conduttore per un percorso esplorativo all’interno dell’Orlando furioso che ne vaglia la valenza per così dire “ariostesca”, giusta la reminiscenza borgesiana. Approdata infine a Cervantes, la discussione si conclude facendo ritorno a Borges e misurando l’impatto che quei medesimi versi hanno avuto sulla sua propria opera poetica.Intended as a heartfelt tribute to Emilio Bigi, albeit an indirect one, this essay draws on an interview, still unpublished, given by Argentine writer Jorge Luis Borges in 1984, in which he quoted a couple of lines of poetry which he firmly believed to be by Ariosto, and which for him, by then an old man, had become, more than a motto, a metaphor of life. It does not really matter that, as will become apparent retracing their history as well as their sources, these lines, centring on the mysterious figure of a Saracen character called Alibante of Toledo, actually belonged to Francesco Berni: they are here assumed as the main motif to be explored within Orlando furioso, in order to ascertain to what extent their nature may be regarded to be Ariostan, just as Borges thought. Having finally reached Cervantes, the discussion concludes by returning once more to Borges and considering the impact that these lines, which had remained engrained in his memory throughout his life, had on his own

  7. Exploring Monte Carlo methods

    CERN Document Server

    Dunn, William L

    2012-01-01

    Exploring Monte Carlo Methods is a basic text that describes the numerical methods that have come to be known as "Monte Carlo." The book treats the subject generically through the first eight chapters and, thus, should be of use to anyone who wants to learn to use Monte Carlo. The next two chapters focus on applications in nuclear engineering, which are illustrative of uses in other fields. Five appendices are included, which provide useful information on probability distributions, general-purpose Monte Carlo codes for radiation transport, and other matters. The famous "Buffon's needle proble

  8. Monte Carlo methods

    Directory of Open Access Journals (Sweden)

    Bardenet Rémi

    2013-07-01

    Full Text Available Bayesian inference often requires integrating some function with respect to a posterior distribution. Monte Carlo methods are sampling algorithms that allow to compute these integrals numerically when they are not analytically tractable. We review here the basic principles and the most common Monte Carlo algorithms, among which rejection sampling, importance sampling and Monte Carlo Markov chain (MCMC methods. We give intuition on the theoretical justification of the algorithms as well as practical advice, trying to relate both. We discuss the application of Monte Carlo in experimental physics, and point to landmarks in the literature for the curious reader.

  9. 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

  10. Valutazione e mappatura dei servizi culturali nei paesaggi terrazzati. Il caso studio della Costiera Amalfitana

    Directory of Open Access Journals (Sweden)

    Antonia Gravagnuolo

    2016-06-01

    Full Text Available I paesaggi culturali rappresentano una risorsa fondamentale per lo sviluppo sostenibile. Tra questi, i paesaggi terrazzati sono classificati come paesaggi culturali “evolutivi viventi” (UNESCO, 2012, espressione della storica interrelazione tra uomo e territorio. Attualmente molti paesaggi terrazzati sono considerati a rischio a causa delle mutate condizioni socio-economiche. L’esigenza della conservazione e di una gestione efficace di questo eccezionale patrimonio pone la questione dell’identificazione di funzioni e valori complessi del paesaggio, tenendo conto di bisogni, visioni e preferenze delle comunità locali. Questo studio ha l’obiettivo di identificare valori e servizi del paesaggio terrazzato sulla base della teoria dei servizi ecosistemici. Viene affrontato il tema della valutazione e mappatura dei servizi culturali, con riferimento al paesaggio terrazzato della Costiera Amalfitana in Campania. Le categorie di servizi sono state valutate con il coinvolgimento della comunità locale attraverso un questionario semi-strutturato somministrato online ad un campione di 147 soggetti. L’integrazione tra valutazione multicriterio e analisi spaziale in ambito GIS (Geographic Information System ha condotto alla costruzione di mappe dei servizi culturali che permettono di visualizzare in maniera sintetica le relazioni complesse che legano l’uomo al paesaggio. Gli strumenti di mapping collaborativo (Volunteered Geographic Information – VGI sono stati utilizzati per la costruzione di alcune delle mappe dei servizi culturali, integrando i risultati del questionario con i dati relativi all’esperienza diretta degli utenti.

  11. Inizio di Carlo Sini: la crisi dei saperi e il compito pedagogico del pensiero

    Directory of Open Access Journals (Sweden)

    Paolo Beretta

    2016-08-01

    Full Text Available Nelle diverse sezioni che compongono Inizio, Carlo Sini affronta in vari modi, a partire da spunti differenti, la crisi attuale dei saperi nel loro senso complessivo e la necessità per la filosofia di ritornare alla sua vocazione pedagogica.

  12. Trent'anni che sconvolsero la fisica la storia della teoria dei quanti

    CERN Document Server

    Gamow, George

    1993-01-01

    Gli anni dal 1900 al 1930 hanno portato un profondo mutamento nella visione che l'uomo aveva dell'universo: tra la prima idea di Max Planck dei quanti di luce nel 1900, e la previsione dell'esistenza delle antiparticelle formulata da P. A. M. Dirac nel 1929, corre un periodo di emozionanti progressi nel campo della fisica teorica.

  13. Social media e sentiment analysis l’evoluzione dei fenomeni sociali attraverso la rete

    CERN Document Server

    Ceron, Andrea; Iacus, Stefano M

    2014-01-01

    Due miliardi e mezzo di utenti internet, oltre un miliardo di account Facebook, 550 milioni di profili Twitter. Che parlano, discutono, si confrontano sui temi più svariati. Un flusso in continuo divenire di informazioni che dà sostanza ogni giorno al mondo dei Big Data. Ma come si analizza concretamente il “sentiment” della Rete? Quali sono i pregi e i limiti dei diversi metodi esistenti? E a quali domande possiamo dare una risposta? Dopo aver presentato le varie tecniche di analisi testuale applicate ai social media, questo libro discute di come l’informazione presente in Rete sia in grado di aiutarci a meglio comprendere il presente e a fare previsioni sul futuro riguardo a una molteplicità di fenomeni sociali, che spaziano dall’andamento dei mercati finanziari, alla diffusione di malattie, alle rivolte e ai sommovimenti popolari fino ai risultati dei talent show, prima di concentrarsi su due casi specifici: l’andamento della felicità degli italiani giorno per giorno, e i risultati delle camp...

  14. "Rulers of Venice, 1349 to 1524". Alcune osservazioni sulla schedatura dei registri del Segretario alle Voci

    Directory of Open Access Journals (Sweden)

    Andrea Mozzato

    2005-12-01

    Full Text Available Illustrazione dei criteri di compilazione del data-base Rulers of Venice, progettato dallo storico americano Benjamin Kohl utilizzando l’archivio della magistratura della repubblica di Venezia denominata “Segretario alle voci”, ed esemplificazione del funzionamento di tale repertorio mediante alcuni case-studies.

  15. DUE NUOVE SPECIE DI OTIORHYNCHUS (LIXORRHYNCHUS REITTER, 1914 E UNA NUOVA SPECIE DI RAYMONDIONYMUS WOLLASTON, 1873 DEI MONTI AURUNCI (LAZIO (COLEOPTERA, CURCULIONOIDEA

    Directory of Open Access Journals (Sweden)

    Paolo Magrini

    2008-10-01

    Full Text Available Nella presente nota vengono descritti tre nuovi Curculionoidea ipogei dei Monti Aurunci (Lazio: Otiorhynchus (Lixorrhynchus avoni n. sp.; Otiorhynchus (Lixorrhyn­chus paulae n. sp. e Raymondionymus pulcherrimus n. sp. Nel testo vengono riportate immagini fotografiche dei principali caratteri esoscheletrici (sia interni che esterni che contraddistinguono le nuove specie, nell’ambito dei gruppi di appartenenza. Una cartina geografica riassume lo stato dell’attuale distribuzione dei Lixorrhynchus anoftalmi o microftalmi in Italia penisulare e nell’area Sardo-Corsa. Le prime due specie presentano indubbie affinità con Otiorhynchus (Lixorrhynchus bastianinii Magrini, Meoli & Abbazzi, 2005, recentemente descritto dei Monti Aurunci centrali [Grava dei Serini (= Grotta dei Serini 587 La/FR], mentre la terza specie costituisce, insieme a R. meggiolaroi (Osella, 1977 (Liguria, R. eximius Meregalli & Osella, 2006 (Lazio, Monti Simbruini e R. zoiai (Osella & Giusto, 1985 (Piemonte, Massiccio del Monviso, un gruppo immediatamente riconoscibile rispetto ai taxa congeneri, per la particolare conformazione del pronoto.

  16. Quality of the Fosso della Casaccia: analysis of the macroinvertebrates colonizing artificial substrates; Stato di qualita` del fosso della Casaccia: analisi dei macroinvertebrati che colonizzano substrati artificiali

    Energy Technology Data Exchange (ETDEWEB)

    Prato, S.; Morgana, J.G.; Antonelli, D.; Folletto, A. [ENEA, Centro Ricerche Casaccia, Rome (Italy). Dipt. Ambiente

    1999-01-01

    Aim of this work is to analyse the environmental quality of a small stream, the Fosso della Casaccia, flowing near Research Centre of ENEA (Rome, Central Italy). The study was carried out comparing zoo benthic communities of two sampling sites, chosen upstream and downstream the sewage of the Research Centre. Macro invertebrates were sampled using artificial substrates and standard hand net. Taxa number and distribution along along the watercourse were compared. Moreover, biotic index values (I.B.E.=Indice Biotico Esteso) were calculated using data on macro invertebrates collected with both sampling methodologies. Artificial substrates were also useful in establishing colonization patterns at each sampling site, and bio masses of individuals belonging to different trophic groups. The results show the greater sampling effectiveness of artificial substrates, confirming their usefulness for establishing the environmental quality. [Italiano] Il presente lavoro prende in considerazione la qualita` ambientale del Fosso della Casaccia, un piccolo corso d`acqua che scorre in prossimita` del Centro di Ricerche ENEA Casaccia (Italia Centrale). Lo studio e` stato realizzato in base al confronto fra le comunita` zoobentoniche di due stazioni sperimentali situate a monte e a valle dello scarico di acque reflue del centro. Il campionamento dei macroinvertebrati e` stato effettuato utilizzando due diversi metodi di raccolta: i substrati artificiali e il retino immanicato standard. Gli organismi sono stati classificati in unita` sistematiche, e si e` analizzata la loro distribuzione lungo il corso d`acqua. Inoltre sono stati calcolati i valori degli indici biotici I.B.E. (Indice Biotico Esteso) utilizzando i dati ottenuti con le due metodologie di campionamento. L`uso di substrati artificiali in ogni stazione di campionamento e` stato utile anche per stabilire il tipo di colonizzazione, l`abbondanza e le biomasse degli individui appartenenti ai vari gruppi trofici. I nostri

  17. Studiare i prezzi dei libri nell'Europa della prima età moderna: questioni e fonti

    Directory of Open Access Journals (Sweden)

    Angela Nuovo

    2017-09-01

    Full Text Available Il contributo presenta in modo sintetico il quadro concettuale all'interno del quale uno studio dei prezzi dei libri nella prima età moderna dovrebbe muoversi, così come i problemi metodologici da affrontare. Nonostante la natura di manufatto semi-industriale ponga il libro a stampa in una classe merceologica del tutto particolare nell'economia pre-industriale, è possibile utilizzare le categorie generali di domanda e offerta per identificare alcuni fattori atti ad impostare specifici percorsi di ricerca basati sull'analisi storico-economica. La storia del libro può essere quindi messa in relazione con alcuni temi classici della storia economica, allo scopo di inserire il problema del commercio librario e dei prezzi dei libri in un dibattito storiografico più ampio. Tra le fonti disponibili per lo studio dei prezzi dei libri nella prima età moderna, l'inventario di bottega di Bernardo Giunti (Department of Special Collections, UCLA, Collection 170/622 è una chiara testimonianza del fiorente mercato librario allora esistente a Venezia. Le quasi 12.000 registrazioni incluse nella lista dei libri in vendita riflettono gli scopi e gli obiettivi dell’azienda. La struttura di questo documento è decisamente complessa, frutto di più di venti anni di uso continuo (1600-1620 c.. Lungo questo periodo di tempo, il documento sembra essere evoluto da un semplice elenco o catalogo ad uso del personale interno a un importante strumento per la gestione della bottega e del suo magazzino. Quasi ogni titolo presenta un prezzo, e ciò rende questo inventario una delle fonti più ampie e significative per lo studio dei prezzi dei libri nella prima età moderna.This project has received funding from the European Research Council (ERC under the European Union's Horizon 2020 research and innovation programme (Grant Agreement n° 694476.

  18. Monte Carlo: Basics

    OpenAIRE

    Murthy, K. P. N.

    2001-01-01

    An introduction to the basics of Monte Carlo is given. The topics covered include, sample space, events, probabilities, random variables, mean, variance, covariance, characteristic function, chebyshev inequality, law of large numbers, central limit theorem (stable distribution, Levy distribution), random numbers (generation and testing), random sampling techniques (inversion, rejection, sampling from a Gaussian, Metropolis sampling), analogue Monte Carlo and Importance sampling (exponential b...

  19. MORSE Monte Carlo code

    International Nuclear Information System (INIS)

    Cramer, S.N.

    1984-01-01

    The MORSE code is a large general-use multigroup Monte Carlo code system. Although no claims can be made regarding its superiority in either theoretical details or Monte Carlo techniques, MORSE has been, since its inception at ORNL in the late 1960s, the most widely used Monte Carlo radiation transport code. The principal reason for this popularity is that MORSE is relatively easy to use, independent of any installation or distribution center, and it can be easily customized to fit almost any specific need. Features of the MORSE code are described

  20. La costellazione dei generi: forme letterarie e modi del discorso nel pensiero di Paul Ricœur

    Directory of Open Access Journals (Sweden)

    Roberto Talamo

    2013-12-01

    Full Text Available Il pensiero filosofico di Ricœur si è sviluppato attraverso un costante e proficuo confronto con le diverse forme della letteratura antica e moderna. Con una carrellata attraverso i testi del filosofo e quelli dei principali interpreti della sua riflessione, si ricostruisce la trama significativa dei nessi tra filosofia e generi letterari: questi offrono al pensiero ricoeuriano la possibilità di «pensare di più» i nodi etici del campo filosofico.

  1. Indagini su conoscenze e comportamenti dei medici in tema di prevenzione delle neoplasie del cavo orale: primi risultati

    Directory of Open Access Journals (Sweden)

    G. Nicotera

    2003-05-01

    Full Text Available

    Obiettivi: l’indagine si propone di valutare il livello di conoscenze ed i comportamenti dei medici italiani in merito alla prevenzione delle neoplasie del cavo orale.

    Metodi: lo studio è stato effettuato mediante l’invio postale ad un campione casuale di 500 di medici di medicina generale della regione Calabria di un questionario con 38 domande strutturate in 3 sezioni: caratteristiche anagrafiche e lavorative (sesso, età, anni di attività, etc., conoscenze (principali fattori di rischio, lesioni precancerose, sede di insorgenza, etc. e comportamenti (esame obiettivo del cavo orale, anamnesi personale, etc..

    Risultati: i dati si riferiscono ai primi 151 questionari
    restituiti. La maggior parte dei rispondenti è di
    sesso maschile, l’età media è di 51.4 anni, la media
    degli anni di attività lavorativa è 19 anni e meno dei
    due terzi dei medici afferma di lavorare più di 30
    ore settimanali. Relativamente al livello delle conoscenze,
    solo il 19% dei medici conosce almeno 3 dei principali fattori di rischio del cancro della cavità orale, poco più di un terzo (35.1% riconosce la leucoplachia e l’eritroplachia come le due principali lesioni precancerose associate alle neoplasie e il 56.7% identifica il carcinoma squamocellulare
    come la forma neoplastica più diffusa della bocca.

    Per quanto riguarda i comportamenti, i primi risultati si evidenziano che il 67% del campione effettua l’esame obiettivo del cavo orale e poco meno dei due raccoglie informazioni inerenti all’ uso/abuso di alcool e tabacco dei pazienti.

    Conclusioni: i primi risultati dello studio, se pur preliminari, fanno emergere l’importanza di pianificare interventi formativi in merito alla prevenzione delle neoplasie del cavo orale.

  2. Variational Monte Carlo Technique

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 19; Issue 8. Variational Monte Carlo Technique: Ground State Energies of Quantum Mechanical Systems. Sukanta Deb. General Article Volume 19 Issue 8 August 2014 pp 713-739 ...

  3. Femminile/Maschile nel corpo danzante: Il lago dei cigni

    Directory of Open Access Journals (Sweden)

    Rita Maria Fabris

    2014-02-01

    Full Text Available The gender transformation myth of Ceni/Ceneus, described in Ovid's Metamorphoses, impregnates the reflection on the social perception of the gender identity, which has been reworked by the culture since the Greek-Roman antiquity until today. While the phenomenological philosophy argues that the 'incarnation' of gender belongs to the ontology of the human being, cultural studies point out that it has been produced by a systematic use of codes and conventions shared by a group. By this perspective, in the re-creations of the most well-known Swan Lake the gender transformation originally 'incarnated' by female swans – representations of the western female ideology in the Nineteenth century – then by the Matthew Bourne's manly swans in 1995, gives me the opportuny to deconstruct how the male gaze perceives the female gender both through the Ballets Trockadero de Monte Carlo's irony and Mats Ek's parody. I use also this occasion to repeat a compelling question: does the female body matter in the social perception nowadays?

  4. Evaluation of Biomechanical Changes in Myopia Patients with Unsatisfactory Corneas After Femto Second-Laser In Situ Keratomileusis (FS-LASIK) Concurrent with Accelerated Corneal Collagen Cross-Linking Using Corvis-ST: Two-Year Follow-Up Results.

    Science.gov (United States)

    Xu, Weiwei; Tao, Ye; Wang, Liqiang; Huang, Yifei

    2017-07-27

    BACKGROUND Some myopia patients with unsatisfactory corneas consider corneal refractive surgery for different reasons. Accelerated corneal collagen crosslinking (ACXL) is an effective method to enhance the resistance of the cornea. The present investigation was designed to evaluate the changes of biomechanical properties in patients with myopia and thin corneas after femtosecond-laser in situ keratomileusis (FS-LASIK) concurrent with ACXL. MATERIAL AND METHODS A prospective study was designed. A total of 22 eyes of 11 myopia astigmatism patients with unsatisfactory corneas were enrolled. The patients were assigned to femtosecond-laser in situ keratomileusis concurrent with accelerated corneal collagen crosslinking (FS-LASIK-ACXL). The follow-up duration was 24 months. Manifest refraction, uncorrected (UDVA), and corrected distance visual acuity (CDVA), ultra-high-speed camera (Corvis-ST), corneal topography, anterior segment OCT (AS-OCT), Pentacam, and endothelial cell density (ECD) were examined before and after the operation. The corneal biomechanical and refractive data was analyzed using SAS9.3. Data were analyzed through normal distribution test and variance of analysis. The difference was considered as statistically significant when pLASIK-ACXL operation. The values of first applanation length (A1L), the second applanation length (A2L), the first applanation velocity (A1V), the second applanation velocity (A2V), deformation amplitude (DA), highest concavity peak distance (PD), and radius of curvature at the time of highest concavity (HCR) did not show significant difference after the operation. CONCLUSIONS FS-LASIK-ACXL is an effective and safe surgery for improving visual acuity for myopic patients with thin corneas, and it does not increase the risk of iatrogenic keratectasia.

  5. Valutazione dei parametri ecocardiografici di funzionalità atriale in cavalli dell’Esercito Italiano

    OpenAIRE

    Carta, Sergio

    2017-01-01

    In cardiologia equina, nonostante la fibrillazione atriale rappresenti l’aritmia di più frequente riscontro nei cavalli atleti, le metodiche ecocardiografiche per valutare le dimensioni dell’atrio sinistro non appaiono ancora ben standardizzate. Lo scopo della presente tesi è stato quello di contribuire alla standardizzazione della valutazione ecocardiografica delle dimensioni dell’atrio sinistro e dei parametri di funzionalità atriale, calcolati sulla base delle misure bidimensionali (dia...

  6. La gestione dei flussi turistici tramite sistemi di trasporto innovativi: l’esempio di Perugia

    Directory of Open Access Journals (Sweden)

    Leonardo Naldini

    2010-10-01

    Full Text Available La città di Perugia ha, fin dagli anni ’70, unito alla sua capacità di attrazione turistica, dovuta al patrimonio storico ambientale plurimillenario, una volontà di affrontare il tema della mobilità urbana in maniera profondamente innovativa ed ambientalmente sostenibile. Il concetto della creazione di parcheggi di attestazione, serviti da percorsi meccanizzati di risalita verso l’acropoli, è stato recentemente ampliato dalla creazione del Minimetro, mezzo di trasporto innovativo, dal ridottissimo impatto ambientale, che unisce in soli 12 minuti, con un servizio semicontinuo, l’area di valle di Pian di Massiano, dotata di un capace parcheggio da circa 2800 posti auto, al centro cittadino, servendo diversi quartieri urbani. Tale sistema di trasporto, corridoio forte del trasporto pubblico urbano, ha fornito lo spunto per attuare una nuova modalità di gestione dei flussi turistici, che individua nel Minimetro la modalità principale di accesso al centro storico sia per i gruppi a numero ridotto, sia per i gruppi organizzati in arrivo con i bus turistici. L’organizzazione della mobilità turistica che ne è derivata costituisce un ulteriore passo in avanti lungo quell’itinerario di gestione della città che cerca di coniugare l’attrattiva turistica, con le sue ricadute in termini di crescita economica, e la salvaguardia del patrimonio storico artistico e della qualità della vita dei cittadini. Gli scenari futuri vedono un’iniezione di tecnologia in questo contesto, con l’introduzione nella gestione dei flussi turistici dei concetti di accreditamento, dell’infomobilità come supporto alle politiche urbane, del controllo unito alla fornitura di servizi georeferenziati.

  7. La libertà religiosa tra ascesa e crisi dei diritti umani

    Directory of Open Access Journals (Sweden)

    Carlo Cardia

    2016-06-01

    SOMMARIO: 1. Premessa – 2. Il cammino verso la laicità dello Stato – 3. La rivoluzione della laicità, i totalitarismi, la terra promessa dei diritti umani – 4. Le nuove sfide. il secolarismo senza etica – 5. Altri segni di regresso: antisemitismo, guerra ai simboli religiosi – 6. Il mischiarsi della storia, il confondersi di religioni, popoli, culture – 7. La bestemmia della violenza religiosa.

  8. Analisi dei metaboliti secondari da fonti naturali: isolamento, caratterizzazione strutturale e attività biologiche

    OpenAIRE

    Nini, Antonella

    2015-01-01

    L’ attività di ricerca del Dottorato di Ricerca in Scienze e Tecnologie Biologiche, XXVII ciclo, si inserisce nell’ambito della chimica delle sostanze naturali ed è rivolta all’isolamento e alla caratterizzazione strutturale dei metaboliti secondari provenienti da matrici vegetali . Le specie oggetto di studio sono piante, utilizzate nella medicina popolare per le loro caratteristiche fitoterapiche, oppure sono impiegate anche nell’alimentazione. L’indagine chimica si è concentrata sulle ...

  9. Considerazioni sul problema dei rigassificatori tra aggregazione del consenso e conflitto ambientale

    OpenAIRE

    Lodoli, Flavio

    2011-01-01

    2009/2010 Considerazioni sul problema dei Rigassificatori tra Aggregazione del Consenso e Conflitto Ambientale 1. Il nostro Paese, per scelta politica e per una sostanziale limitata capacità di innovazione del mondo industriale, ha una quota attuale di produzione di energia da fonti rinnovabili poco significativa nonostante gli investimenti, i contributi e le agevolazioni fiscali che dovrebbero incentivare opportunamente ad esempio, l’utilizzo dell’energia solare che rappresenta una...

  10. La qualità dell'eLearning Un approccio qualitativo per l'analisi dei feedback degli studenti e dei docenti

    Directory of Open Access Journals (Sweden)

    Patrizia Ghislandi

    2012-11-01

    Full Text Available La discussione sulla qualità dell'eLearning accademico si sta orientando verso una critica dei modelli di qualità più legati alla produzione industriale, che sono principalmente fondati sulla conformità a standards prestabiliti, i quali a loro volta richiedono generalmente metodi di valutazione quantitativi (Ehlers & Schneckenberg, 2010, Ghislandi, 2008, 2012. In ambito formativo questo implica una visione molto centrata sui risultati (outputs e sull'impatto (outcomes, con scarsa attenzione ai processi. Una visione innovativa della qualità richiede la profonda comprensione di elementi contestuali complessi, delle interazioni e dimensioni relazionali spesso invisibili dagli strumenti quantitativi; e, soprattutto, della generazione di logiche partecipate che aumentino la consapevolezza degli attori coinvolti nei processi che portano alla qualità del modello formativo. In questo lavoro, attraverso la presentazione di uno studio di caso di formazione continua blended, viene introdotto un approccio per il monitoraggio della qualità dell'eLearning. Tale approccio predilige metodologie di analisi qualitativa e partecipata, basate sulla riflessione e  sull’utilizzo di rubric per l’analisi dell’attività formativa. Tale approccio, secondo le autrici, risulta coerente sia dal punto di vista metodologico sia da quello epistemologico, con una nuova visione della qualità come processo continuo di riflessione sulla valutazione dell'esperienza formativa alla scoperta del senso e dei valori portanti della stessa.

  11. 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.

  12. Image quality dependence on thickness of sliced rat kidney taken by a simplest DEI construction

    Energy Technology Data Exchange (ETDEWEB)

    Li Gang [Institute of High Energy Physics, Chinese Academy of Science, Yuquan Rd. No 19, Beijing 100039 (China)]. E-mail: lig@ihep.ac.cn; Chen Zhihua [China-Japan Friendship Institute of Clinical Medical Science, Yinghua Rd., Beijing 100029 (China); Wu Ziyu [Institute of High Energy Physics, Chinese Academy of Science, Yuquan Rd. No 19, Beijing 100039 (China); Ando, M. [Photon Factory, KEK, Oho 1-1, Tsukuba, Ibaraki 305-0801 (Japan); Pan Lin [China-Japan Friendship Institute of Clinical Medical Science, Yinghua Rd., Beijing 100029 (China); Wang, J.Y. [Institute of High Energy Physics, Chinese Academy of Science, Yuquan Rd. No 19, Beijing 100039 (China); Jiang, X.M. [Institute of High Energy Physics, Chinese Academy of Science, Yuquan Rd. No 19, Beijing 100039 (China)

    2005-08-11

    The excised rat kidney slices were investigated using a simplified diffraction-enhanced imaging (DEI) configuration with only two crystals: the first one working as monochromator and the second one working as analyzer in the Bragg geometry that was developed at Beijing Synchrotron Radiation Facility (BSRF). Many fine anatomic structures of the sliced rat kidneys with thickness of 2mm and 120{mu}m can be distinguished clearly in the DEI images that were obtained at the shoulder of a rocking curve. The authors would like to emphasize that the thick and thin slices DEI provides very different images; in the thick sample only the structure with the big density gradient or that near the surface where X-ray comes out can be distinguished, while in the thin ones some fine structures, which can not be distinguished at the thick sample under the same condition, can be seen very clearly. The reason related with the counteraction of {delta}(x,y,z) gradient in the integral process along the X-ray path inside the thick sample is discussed.

  13. Musei post-etnografici: Le trasformazioni dei rapporti tra antropologia e museo in Francia

    Directory of Open Access Journals (Sweden)

    Benoît de L'Estoile

    2016-08-01

    Full Text Available L’articolo riflette sulle trasformazioni contemporanee dei rapporti tra antropologia e museo in Francia alla luce dell’apertura negli ultimi anni del Musée du quai Branly, del Musée des Civilisations de l'Europe et de la Méditerranée (MUCEM, e del rinnovamento del Musée de l'Homme. La relazione tra musei e antropologia, storicamente più stretta in Francia che in altri contesti nazionali, spiega l’intensità delle reazioni suscitate da queste trasformazioni. La ricostruzione della successione dei progetti di musei etnografici, e in particolare l’ideale del ‘museo-laboratorio’, dimostra il ruolo duraturo del paradigma enciclopedico-naturalista. L’esaurimento del paradigma naturalista, tanto negli stessi musei di storia naturale come il Muséum National d'Histoire Naturelle di Parigi quanto nei musei etnografici, ha prodotto una trasformazione del ruolo dei musei, sancito dal passaggio da un discorso museografico centrato sulla scienza e il razionalismo ad un approccio estetizzante fondato sulle emozioni. Allo stesso tempo, il paradigma naturalista ed evoluzionista rinasce nel nuovo Musée de l'Homme, inaugurato nel 2015. Questi nuovi musei, che possono essere definiti come ‘post-etnografici’, non sono ancora riusciti a fare i conti con la storia e con il loro passato coloniale. Nel contempo, l’antropologia francese si trova di fronte alla sfida di reinventarsi come ‘antropologia post-museo’.

  14. Image quality dependence on thickness of sliced rat kidney taken by a simplest DEI construction

    International Nuclear Information System (INIS)

    Li Gang; Chen Zhihua; Wu Ziyu; Ando, M.; Pan Lin; Wang, J.Y.; Jiang, X.M.

    2005-01-01

    The excised rat kidney slices were investigated using a simplified diffraction-enhanced imaging (DEI) configuration with only two crystals: the first one working as monochromator and the second one working as analyzer in the Bragg geometry that was developed at Beijing Synchrotron Radiation Facility (BSRF). Many fine anatomic structures of the sliced rat kidneys with thickness of 2mm and 120μm can be distinguished clearly in the DEI images that were obtained at the shoulder of a rocking curve. The authors would like to emphasize that the thick and thin slices DEI provides very different images; in the thick sample only the structure with the big density gradient or that near the surface where X-ray comes out can be distinguished, while in the thin ones some fine structures, which can not be distinguished at the thick sample under the same condition, can be seen very clearly. The reason related with the counteraction of δ(x,y,z) gradient in the integral process along the X-ray path inside the thick sample is discussed

  15. Wisdom of God as Ars Dei Have bl. Augustine: between Neoplatonism and Christianity

    Directory of Open Access Journals (Sweden)

    Fokin Aleksei

    2016-10-01

    Full Text Available The article deals with the notion of ars Dei (“art of God” in philosophical and theological thought of St. Augustine of Hippo. It is argued that ars Dei is not only an intelligent design or knowledge which God had with regard to his creation, but also the divine Wisdom and Word of God, in whom exist the eternal and unchangeable forms and reasons of all things, according to which God not only knows, but also creates everything. It is notified, that the notion of ars Dei reflects the Neo-Platonic notion of the universal Intellect (νοDς and also has an affi nity with the concept of the universal Logos, or “designing Logos” (τεχνικOς λMγος, as found in the works of Philo and in those of several Greek Fathers of the Church, as well as is a result of a development of the biblical notions of the Wisdom and Word of God, through whom all things were made. In the same time Augustine’s doctrine is truly without peer in contemporary philosophical and Patristic literature.

  16. La misurazione dei processi di regolazione cognitiva e metacognitiva durante lo studio con gli ipermedia

    Directory of Open Access Journals (Sweden)

    Roger Azevedo

    2010-01-01

    Full Text Available L’apprendimento autoregolato rappresenta una modalità di apprendimento di fondamentale importanza quando ci si avvale del supporto di ambienti ipermediali. Obiettivo di questo articolo è presentare quattro assunzioni chiave che consentono la misurazione dei processi cognitivi e metacognitivi attivati durante l’apprendimento tramite ipermedia. Innanzi tutto, assumiamo che sia possibile individuare, tracciare, modellare e favorire processi di apprendimento auto-regolato durante lo studio con gli ipermedia. La seconda assunzione si focalizza sul comprendere come la complessità dei processi regolatori che avvengono durante l’apprendimento mediato da sistemi ipermediali sia importante per determinare il perché alcuni processi vengono messi in atto durante l’esecuzione di un compito. Le terza assunzione è relativa al considerare che l’utilizzo di processi di apprendimento auto-regolato possa dinamicamente cambiare nel tempo e che tali processi sono di natura ciclica (influenzati dalle condizioni interne ed esterne e da meccanismi di feedback. Infine, l’identificazione, raccolta e classificazione dei processi di apprendimento autoregolato utilizzati durante lo studio con sistemi ipermediali, può risultare un compito alquanto difficoltoso.

  17. Monte Carlo codes and Monte Carlo simulator program

    International Nuclear Information System (INIS)

    Higuchi, Kenji; Asai, Kiyoshi; Suganuma, Masayuki.

    1990-03-01

    Four typical Monte Carlo codes KENO-IV, MORSE, MCNP and VIM have been vectorized on VP-100 at Computing Center, JAERI. The problems in vector processing of Monte Carlo codes on vector processors have become clear through the work. As the result, it is recognized that these are difficulties to obtain good performance in vector processing of Monte Carlo codes. A Monte Carlo computing machine, which processes the Monte Carlo codes with high performances is being developed at our Computing Center since 1987. The concept of Monte Carlo computing machine and its performance have been investigated and estimated by using a software simulator. In this report the problems in vectorization of Monte Carlo codes, Monte Carlo pipelines proposed to mitigate these difficulties and the results of the performance estimation of the Monte Carlo computing machine by the simulator are described. (author)

  18. Taking bail-in seriously: The looming risks for banking policy in the rescue of Monte Paschi di Siena

    OpenAIRE

    Götz, Martin; Krahnen, Jan Pieter; Tröger, Tobias

    2017-01-01

    According to the Bank Recovery and Resolution Directive (BRRD), introduced as a lesson from the recent financial crisis, the losses a failing bank incurred should generally be borne by its investors. Before a minimum bail-in has occurred, government money can only be injected in emergency cas-es to remedy a serious disturbance in the economy and to preserve financial stability. This policy letter argues that in case of the Italian Bank Monte dei Paschi di Siena (MPS), which the Italian gov-er...

  19. Vectorized Monte Carlo

    International Nuclear Information System (INIS)

    Brown, F.B.

    1981-01-01

    Examination of the global algorithms and local kernels of conventional general-purpose Monte Carlo codes shows that multigroup Monte Carlo methods have sufficient structure to permit efficient vectorization. A structured multigroup Monte Carlo algorithm for vector computers is developed in which many particle events are treated at once on a cell-by-cell basis. Vectorization of kernels for tracking and variance reduction is described, and a new method for discrete sampling is developed to facilitate the vectorization of collision analysis. To demonstrate the potential of the new method, a vectorized Monte Carlo code for multigroup radiation transport analysis was developed. This code incorporates many features of conventional general-purpose production codes, including general geometry, splitting and Russian roulette, survival biasing, variance estimation via batching, a number of cutoffs, and generalized tallies of collision, tracklength, and surface crossing estimators with response functions. Predictions of vectorized performance characteristics for the CYBER-205 were made using emulated coding and a dynamic model of vector instruction timing. Computation rates were examined for a variety of test problems to determine sensitivities to batch size and vector lengths. Significant speedups are predicted for even a few hundred particles per batch, and asymptotic speedups by about 40 over equivalent Amdahl 470V/8 scalar codes arepredicted for a few thousand particles per batch. The principal conclusion is that vectorization of a general-purpose multigroup Monte Carlo code is well worth the significant effort required for stylized coding and major algorithmic changes

  20. L’interconnessione dei registri europei della proprietà immobiliare: il caso italiano e spagnolo a confronto

    Directory of Open Access Journals (Sweden)

    Agostina Lodde

    2017-06-01

    Full Text Available La necessità che le informazioni detenute dai Registri Immobiliari possano liberamente circolare all’interno dello spazio dell’Unione rappresenta un obiettivo prioritario nell’ambito della strategia delineata dal Consiglio UE in materia di giustizia elettronica europea 2014-2018, la quale prevede di incentrare l’azione “sulla interconnessione dei registri che presentino un interesse per i cittadini, le imprese, gli operatori della giustizia e i magistrati”. Pertanto, si afferma che “si dovrebbero assicurare i presupposti tecnici e giuridici necessari per rendere possibile tale interconnessione”. La realizzazione dei “presupposti tecnici” di cui si parla, grazie agli sviluppi straordinari delle tecnologie informatiche, rappresenta il traguardo meno difficile da raggiungere, mentre è di gran lunga più complicato risolvere le difficoltà giuridiche derivanti dalla storica diversità dei Registri, tenendo anche in considerazione il limite posto dall’art. 345 del Trattato sul Funzionamento dell’Unione Europea, secondo il quale “I trattati lasciano del tutto impregiudicato il regime di proprietà esistente negli Stati membri”. Per meglio comprendere le suddette diversità e facendo seguito alla panoramica sui diversi sistemi europei di registrazione immobiliare illustrata da Lodde (2016, si è cercato di fornire un quadro comparato dei sistemi di registrazione italiano e spagnolo, sistemi che poggiano su tradizioni giuridiche comuni (quelle di civil law ma che, per diversi percorsi evolutivi, sono pervenuti a una regolamentazione completamente differente dei rispettivi Registri.

  1. Imaging lobular breast carcinoma: comparison of synchrotron radiation DEI-CT technique with clinical CT, mammography and histology

    Science.gov (United States)

    Fiedler, S.; Bravin, A.; Keyriläinen, J.; Fernández, M.; Suortti, P.; Thomlinson, W.; Tenhunen, M.; Virkkunen, P.; Karjalainen-Lindsberg, M.-L.

    2004-01-01

    Different modalities for imaging cancer-bearing breast tissue samples are described and compared. The images include clinical mammograms and computed tomography (CT) images, CT images with partly coherent synchrotron radiation (SR), and CT and radiography images taken with SR using the diffraction enhanced imaging (DEI) method. The images are evaluated by a radiologist and compared with histopathological examination of the samples. Two cases of lobular carcinoma are studied in detail. The indications of cancer are very weak or invisible in the conventional images, but the morphological changes due to invasion of cancer become pronounced in the images taken by the DEI method. The strands penetrating adipose tissue are seen clearly in the DEI-CT images, and the histopathology confirms that some strands contain the so-called 'Indian file' formations of cancer cells. The radiation dose is carefully measured for each of the imaging modalities. The mean glandular dose (MGD) for 50% glandular breast tissue is about 1 mGy in conventional mammography and less than 0.25 mGy in projection DEI, while in the clinical CT imaging the MGD is very high, about 45 mGy. The entrance dose of 95 mGy in DEI-CT imaging gives rise to an MGD of 40 mGy, but the dose may be reduced by an order of magnitude, because the contrast is very large in most images.

  2. Markov Chain Monte Carlo

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 7; Issue 3. Markov Chain Monte Carlo - Examples. Arnab Chakraborty. General Article Volume 7 Issue 3 March 2002 pp 25-34. Fulltext. Click here to view fulltext PDF. Permanent link: https://www.ias.ac.in/article/fulltext/reso/007/03/0025-0034. Keywords.

  3. Monte Carlo and Quasi-Monte Carlo Sampling

    CERN Document Server

    Lemieux, Christiane

    2009-01-01

    Presents essential tools for using quasi-Monte Carlo sampling in practice. This book focuses on issues related to Monte Carlo methods - uniform and non-uniform random number generation, variance reduction techniques. It covers several aspects of quasi-Monte Carlo methods.

  4. Valutazione dell'appropriatezza dei ricoveri in un Policlinico Universitario: analisi mediante l'uso comparativo dei sistemi di classificazione isogravitá APR-DRG e Disease Staging e del PRUO

    Directory of Open Access Journals (Sweden)

    M. Volpe

    2003-05-01

    Full Text Available

    Obiettivi: valutare l’appropriatezza organizzativa dei ricoveri effettuati in un Policlinico Universitario attraverso la comparazione di due metodi, dei quali uno basato sui dati della scheda di dimissione ospedaliera ed utilizza, rispettivamente, i sistemi di classificazione iso-gravità APR-DRG e Disease Staging e l’altro sulla revisione delle cartelle cliniche mediante il PRUO.

    Metodi: oggetto di analisi sono i ricoveri ordinari effettuati nell’anno 2001 ed afferenti ai DRG inclusi nella delibera della Giunta Regionale del Lazio 864/2002 che recepisce il D.P.C.M. 29/11/2001 sui livelli essenziali di assistenza.

    Risultati: i risultati evidenziano che le due varianti del
    metodo basato sulla SDO (metodo APPRO mostrano quote di ricoveri inappropriati sovrapponibili rispetto al complesso dei ricoveri oggetto di analisi, ma con differenze anche rilevanti tra APR-DRG e Disease Staging in relazione ai singoli DRG considerati, riconducibili ai diversi algoritmi di attribuzione del livello di severità utilizzati dai due sistemi. L’analisi campionaria effettuata con il metodo PRUO su casi afferenti ai DRG della DGR 864/2002 caratterizzati da livelli di severità minimi evidenzia una proporzione di ricoveri inappropriati superiore a quella determinata tramite i metodi basati sulla SDO. Tale differenza è verosimilmente dovuta al ruolo del valore delle soglie percentuali di accettabilità individuate dalla Regione Lazio per ciascun DRG: le quote di ricoveri che eccedono tali soglie sono considerate inappropriate.

    Conclusioni: sulla base dei risultati ottenuti gli autori
    descrivono gli interventi organizzativi adottati per ottimizzare il contesto di erogazione delle prestazioni
    oggetto di analisi, discutono vantaggi e limiti dei metodi SDO-based e del metodo analitico PRUObased e ne propongono l

  5. Reclutamento e formazione dei poliziotti: il caso degli ufficiali della gendarmeria francese

    Directory of Open Access Journals (Sweden)

    François Dieu

    2007-04-01

    Full Text Available Partendo dal caso degli ufficiali della gendarmeria francese, questo articolo illustra il modo in cui il reclutamento e la formazione possono contribuire, informalmente, alla ripartizione del potere nelle organizzazioni di polizia. Tramite la diversità delle vie di reclutamento si costituisce, di fatto, un vero e proprio sistema di "caste", con una stratificazione degli ufficiali in tre livelli gerarchici, che produce, al di là dei principi meritocratici, delle ineguaglianze manifeste nella ripartizione del potere nell'organizzazione della gendarmeria.

  6. OCT structural examination of Madonna dei Fusi by Leonardo da Vinci

    Science.gov (United States)

    Targowski, Piotr; Iwanicka, Magdalena; Sylwestrzak, Marcin; Kaszewska, Ewa A.; Frosinini, Cecilia

    2013-05-01

    Madonna dei Fusi (`Madonna of the Yarnwider') is a spectacular example of Italian Renaissance painting, attributed to Leonardo da Vinci. The aim of this study is to give an account of past restoration procedures. The evidence of a former retouching campaign will be presented with cross-sectional images obtained non-invasively with Optical Coherence Tomography (OCT). Specifically, the locations of overpaintings/retouchings with respect to the original paint layer and secondary varnishes will be given. Additionally, the evidence of a former transfer of the pictorial layer to the new canvas support by detecting the presence of its structure incised into paint layer will be shown.

  7. Valutazione della qualitá dei dati in uno studio post marketing

    Directory of Open Access Journals (Sweden)

    D. D’Alessandro

    2003-05-01

    Full Text Available

    Obiettivo: misurare l'affidabilita nella segnalazione
    di eventi avversi a vaccino nell'ambito di uno studio post-marketing sulla tollerabilita della vaccinazione antipneumococcica (AP in associazione con la vaccinazione antinfluenzale (AI nella popolazione anziana.


    Metodi: e stato predisposto un modello di regressione
    logistica per stimare gli OR tra la segnalazione di almeno un effetto collaterale locale (y ed alcune variabili individuali dei vaccinati (x1: eta .75 anni; x2: sesso; x3: allergie; x4: associazione AI+AP; x5: vivere solo; x6: patologie croniche. I medici aderenti al progetto (229 sono stati stratificati in cinque categorie in funzione dellfincidenza media di eventi avversi da loro registrata: 0% (29, 1-5%
    (68, 6-10% (50, 11-50% (72, .50% (10. Lo stesso modello di regressione e stato applicato ai quattro
    sotto-gruppi di vaccinati afferenti alle categorie di medici che hanno segnalato sintomi, per valutare la coerenza degli OR registrati nei gruppi.

    Risultati: tra i 29.086 vaccinati, l'f11,3% (3.278 ha segnalato almeno un evento avverso locale nelle
    72 ore successive alla vaccinazione: 9,9% tra i soggetti vaccinati con AI e 13,9% tra i vaccinati con
    AI+AP. I fattori significativamente associati all'faumento di rischio sono: AI+AP (OR 1,4; allergie (OR 1,3; patologie croniche (OR 1,3. L' applicazione del modello di regressione ai sotto-gruppi di vaccinati ha mostrato un trend negli OR per le categorie di medici che hanno segnalato dall'f1-5% fino all'f11- 50%, mostrando un'effettiva differenza di rischio dei pazienti.

    Tale coerenza non si e evinta nell'ultima categoria (.50%, dove tali fattori appaiono addiritura protettivi nei riguardi dei sintomi (AI+AP: OR 0,5; allergie: OR 0,7, o non associati
    (patologie croniche: OR 1,0.

    Conclusioni: il 4,3% dei medici arruolati nello studio (10 su 229 ha

  8. Monte Carlo principles and applications

    Energy Technology Data Exchange (ETDEWEB)

    Raeside, D E [Oklahoma Univ., Oklahoma City (USA). Health Sciences Center

    1976-03-01

    The principles underlying the use of Monte Carlo methods are explained, for readers who may not be familiar with the approach. The generation of random numbers is discussed, and the connection between Monte Carlo methods and random numbers is indicated. Outlines of two well established Monte Carlo sampling techniques are given, together with examples illustrating their use. The general techniques for improving the efficiency of Monte Carlo calculations are considered. The literature relevant to the applications of Monte Carlo calculations in medical physics is reviewed.

  9. Bayesian Monte Carlo method

    International Nuclear Information System (INIS)

    Rajabalinejad, M.

    2010-01-01

    To reduce cost of Monte Carlo (MC) simulations for time-consuming processes, Bayesian Monte Carlo (BMC) is introduced in this paper. The BMC method reduces number of realizations in MC according to the desired accuracy level. BMC also provides a possibility of considering more priors. In other words, different priors can be integrated into one model by using BMC to further reduce cost of simulations. This study suggests speeding up the simulation process by considering the logical dependence of neighboring points as prior information. This information is used in the BMC method to produce a predictive tool through the simulation process. The general methodology and algorithm of BMC method are presented in this paper. The BMC method is applied to the simplified break water model as well as the finite element model of 17th Street Canal in New Orleans, and the results are compared with the MC and Dynamic Bounds methods.

  10. Delicta reservata seu delicta graviora: la disciplina dei crimini rimessi alla competenza della Congregazione per la Dottrina della Fede

    Directory of Open Access Journals (Sweden)

    Daniela Milani

    2013-10-01

    Full Text Available contributo sottoposto a valutazioneSOMMARIO: 1. La disciplina dei delicta graviora: una riforma mossa dall'esigenza di contrastare la piaga della pedofilia – 2. Delicta graviora o delicta reservata? Una bussola per orientarsi tra entità del vulnus e competenza – 3. Introduzione alle fattispecie – 4. I delitti contro la fede  – 5. (segue contro la celebrazione dei sacramenti – 6. (segue contro i costumi – 7. La procedura – 8. Qualche considerazione di sistema.

  11. Contributon Monte Carlo

    International Nuclear Information System (INIS)

    Dubi, A.; Gerstl, S.A.W.

    1979-05-01

    The contributon Monte Carlo method is based on a new recipe to calculate target responses by means of volume integral of the contributon current in a region between the source and the detector. A comprehensive description of the method, its implementation in the general-purpose MCNP code, and results of the method for realistic nonhomogeneous, energy-dependent problems are presented. 23 figures, 10 tables

  12. Fundamentals of Monte Carlo

    International Nuclear Information System (INIS)

    Wollaber, Allan Benton

    2016-01-01

    This is a powerpoint presentation which serves as lecture material for the Parallel Computing summer school. It goes over the fundamentals of the Monte Carlo calculation method. The material is presented according to the following outline: Introduction (background, a simple example: estimating @@), Why does this even work? (The Law of Large Numbers, The Central Limit Theorem), How to sample (inverse transform sampling, rejection), and An example from particle transport.

  13. Microcanonical Monte Carlo

    International Nuclear Information System (INIS)

    Creutz, M.

    1986-01-01

    The author discusses a recently developed algorithm for simulating statistical systems. The procedure interpolates between molecular dynamics methods and canonical Monte Carlo. The primary advantages are extremely fast simulations of discrete systems such as the Ising model and a relative insensitivity to random number quality. A variation of the algorithm gives rise to a deterministic dynamics for Ising spins. This model may be useful for high speed simulation of non-equilibrium phenomena

  14. Fundamentals of Monte Carlo

    Energy Technology Data Exchange (ETDEWEB)

    Wollaber, Allan Benton [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-06-16

    This is a powerpoint presentation which serves as lecture material for the Parallel Computing summer school. It goes over the fundamentals of the Monte Carlo calculation method. The material is presented according to the following outline: Introduction (background, a simple example: estimating π), Why does this even work? (The Law of Large Numbers, The Central Limit Theorem), How to sample (inverse transform sampling, rejection), and An example from particle transport.

  15. Monte Carlo alpha calculation

    Energy Technology Data Exchange (ETDEWEB)

    Brockway, D.; Soran, P.; Whalen, P.

    1985-01-01

    A Monte Carlo algorithm to efficiently calculate static alpha eigenvalues, N = ne/sup ..cap alpha..t/, for supercritical systems has been developed and tested. A direct Monte Carlo approach to calculating a static alpha is to simply follow the buildup in time of neutrons in a supercritical system and evaluate the logarithmic derivative of the neutron population with respect to time. This procedure is expensive, and the solution is very noisy and almost useless for a system near critical. The modified approach is to convert the time-dependent problem to a static ..cap alpha../sup -/eigenvalue problem and regress ..cap alpha.. on solutions of a/sup -/ k/sup -/eigenvalue problem. In practice, this procedure is much more efficient than the direct calculation, and produces much more accurate results. Because the Monte Carlo codes are intrinsically three-dimensional and use elaborate continuous-energy cross sections, this technique is now used as a standard for evaluating other calculational techniques in odd geometries or with group cross sections.

  16. Ferrihydrite flocs, native copper nanocrystals and spontaneous remediation in the Fosso dei Noni stream, Tuscany, Italy

    International Nuclear Information System (INIS)

    Genovese, Alessandro; Mellini, Marcello

    2007-01-01

    The Fosso dei Noni stream drains the abandoned mixed-sulfide mining area of Fenice Capanne in Italy. Water pollution mostly derives from two tributaries, one of which adds Cu and the other Zn. Downstream, water pollution is progressively remediated through the spontaneous precipitation of abundant, deeply-colored flocs. Within 1 km, flocs change from yellow-red to whitish and green, as the pH increases from 4.59 to 7.70 and the Eh decreases from +311 to +165 mV. Flocs are initially amorphous; with a near-neutral pH, their X-ray diffraction properties suggest the presence of two-line ferrihydrite. Transmission electron microscopy reveals major nanotextural modifications in flocs along the entire stream. Upstream, flocs consist of globular particles with a radius of 25-50 nm. Downstream, they change to globular particles with elongated features. Lastly, further downstream, flocs consist of elongated features interconnected by continuous films. Nanochemical data are consistent with Al and Fe hydroxides (largely contaminated by S, Si, Ca, Cu and Zn); the Cu content increases progressively downstream to a maximum of 18 at. %. The increasing Cu content is paralleled by the appearance of isolated Cu nanocrystals adsorbed on floc surfaces. Spontaneous processes in the Fosso dei Noni stream (water neutralization, formation of ferrihydrite-like flocs and crystallization of native Cu) allow the temporary storage of Cu, providing hints on how to optimize remediation processes and Cu recovery

  17. Topicality of the Second Vatican Council Constitution Dei Verbum in Contemporary Biblical Studies

    Directory of Open Access Journals (Sweden)

    Bogdan Zbroja

    2013-09-01

    Full Text Available The article discusses the issue of how strongly contemporary ecclesiological and scholarly approach to the Sacred Scripture is rooted in the Second Vatican Council Constitution Dei Verbum. The Bible originates from the faith of the Church, and, together with Tradition, helps to build this faith. The text consists of three sections. The first one focuses on God, who reveals Himself and His plan of salvation to man. Then, the ways in which God communicates with man through human authors and the long process of writing the inspired sacred books  are mentioned. The last part emphasises how important it is for man to respond to the Word of God, which will enable the salvific dialogue of man with his Father, through His Son in the Holy Spirit. The community of Church faith is a natural environment of research,  devotional reading and encounters with the Word of God, which are the elements of Christian life that the Constitution Dei Verbum (no. 25 encourages to implement.

  18. Conference Held at the Centro Linceo Interdisciplinare, Accademia Nazionale dei Lincei

    CERN Document Server

    1980-01-01

    The idea of organizing a symposium on mathematical models in biology came to some colleagues, members of the Accademia dei Lincei, in order to point out the importance of mathematics not only for supplying instruments for the elaboration and the evaluation of experimental data, but also for discussing the possibility of developing mathematical formulations of biological problems. This appeared particularly appropriate for genetics, where mathematical models have been of historical importance. When the organizing work had started, it became clear to us that the classic studies of Vito Volterra (who was also a Member of the Academy and its President from 1923 to 1926) might be con­ sidered a further reason to have the meeting in Rome at the Accademia dei Lincei; thus the meeting is dedicated to his memory. Biology, in its manifold aspects proved to Se ~ difficult object for an exhaustive approach; thus it became necessary for practical reasons to make a choice of problems. Therefore not all branches of biology...

  19. Comparison of activity concentration of 238U, 232Th and 40K in different Layers of subsurface Structures in Dei-Dei and Kubwa, Abuja, northcentral Nigeria

    International Nuclear Information System (INIS)

    Maxwell, Omeje; Wagiran, Husin; Ibrahim, Noorddin; Lee, Siak Kuan; Sabri, Soheil

    2013-01-01

    The study of activity concentration of 232 Th, 238 U and 40 K of rock samples from site one (S1L1–S1L11, 70 m) and site two (S2L1–S2L9, 60 m) boreholes in Dei-Dei and Kubwa was presented and the first time in the region to be compared. Activity concentrations were analysed using a high resolution co-axial HPGe gamma ray spectrometer system. The activity concentration ranges in site one borehole were from 45±1 to 98±6 Bq kg −1 for 232 Th, from 18±2 to 37±4 Bq kg −1 for 238 U and from 254 ±32 Bq kg −1 to 1195 ±151 Bq kg −1 for 40 K. The activity concentration ranges in site two borehole were from 32±3 to 84±7 Bq kg −1 for 232 Th, from 15±2 to 52±5 Bq kg −1 for 238 U and from 119±15 to 705±94 for 40 K Bq kg −1 . Significantly higher concentration of 232 Th and 238 U occurs in samples collected from S1L7, S1L11 and S2L1 layers. These zones experienced granitic intrusions produced by denudation and tectonism. 40 K in rock samples of S1L4 and S2L4 activity concentrations is close; it could be that biotite granitic intrusion that is inferred as the formation in that layer reflects the same activity of potassium in rock's radioactivity measurement. The area requires further investigation of soil geochemistry and activity concentration of radionuclides in groundwater. - Highlights: • Activity concentration of 238 U, 232 Th and 40 K was noted high. • The two boreholes show significant different concentrations of 238 U, 232 Th and 40 K. • The Th/U ratio was high in both, but distinctly higher in first borehole. • 232 Th was increasing with depth in site one almost 100%. • The radiological monitoring on groundwater is recommended

  20. Il commercio dei captivi nel Mediterraneo di età moderna (secc. XVI - XVIII. Orientamenti e prospettive attuali di ricerca

    Directory of Open Access Journals (Sweden)

    Bosco, Michele

    2014-02-01

    Full Text Available Da oltre un ventennio, il tema della guerra da corsa e quello del commercio dei captivi nel Mediterraneo di età moderna, ad esso strettamente connesso, sono oggetto di rinnovato interesse da parte della storiografia internazionale. Soprattutto in Italia, Spagna e Francia (ma anche altrove, ricerche sistematiche hanno permesso di ricostruire diversi aspetti della schiavitù nel Mediterraneo di età moderna: modalità della cattura, condizioni di vita dei prigionieri, riscatti, conversioni. Non solo storici, ma anche antropologi, economisti, storici delle religioni e del diritto hanno dato il loro contributo alla ricerca, tradottosi in raccolte di saggi o in volumi monografici; tale abbondante produzione ha innanzitutto mostrato chiaramente come la guerra da corsa e il commercio dei captivi abbiano rappresentato a lungo un elemento cruciale della storia dei paesi che si affacciano sul Mediterraneo, dal medioevo all’età moderna, giungendo fino ai primi decenni del secolo XIX. Nelle prossime pagine proveremo a ricostruire, a grandi linee, l’evoluzione del dibattito storiografico sull’argomento, in modo da far emergere le questioni ancora aperte e di individuare nuovi possibili percorsi di indagine, che sfruttino in particolare le serie documentarie ancora scarsamente utilizzate o meritevoli di ulteriori ricerche.

  1. Un passo indietro sul fronte dei diritti di libertà e di eguaglianza in materia religiosa [?

    Directory of Open Access Journals (Sweden)

    Sergio Lariccia

    2016-06-01

    SOMMARIO: 1. Premessa – 2. La corte ritiene ammissibile l’intervento, nel giudizio costituzionale, dell’associazione privata degli atei e degli agnostici razionalisti. Funzione e importanza dei gruppi sociali organizzati per l’affermazione dei diritti verso e contro le religioni – 3. L’UAAR può essere considerata una confessione religiosa? – 4. Non è ammesso un controllo giurisdizionale sulle decisioni del consiglio dei ministri riguardanti l’avvio delle trattative per la stipulazione di eventuali intese tra una confessione religiosa e lo Stato. Ma “ci sarà pure un giudice a Berlino!” – 5. Potere politico, potere amministrativo e potere giurisdizionale in tema di diritti dei gruppi religiosi in Italia – 6. Ragioni della politica e ragioni del diritto: una scelta metodologica. Dubbi, nella fattispecie, sul ruolo del parlamento come organo di garanzia che esercita il controllo sul governo – 7. 2 aprile 1966: il ricordo di una giornata particolare di cinquant’anni fa.

  2. Comportamento strutturale e qualita' di campo delle bobine dei dipoli per LHC studio e confronto con i risultati sperimentali

    CERN Document Server

    Ferracin, P

    1998-01-01

    Il lavoro di questa tesi consiste nell’analisi e verifica dello stato di tensione e deformazione della bobina dei dipoli superconduttori per LHC (Large Hadron Collider) Il lavoro di questa tesi consiste nell’analisi e verifica dello stato di tensione e deformazione…

  3. “Deus está sonhando você”: Narrativa como Imitatio Dei em Miguel de Unamuno

    Directory of Open Access Journals (Sweden)

    Jaimir Conte

    2010-09-01

    Full Text Available Traduçáo do artigo "'God is dreaming you': Narrative as Imitatio Dei in Miguel de Unamuno," artigo publicado originalmente Janus Head –Interdisciplinary Studies in Continental Philosophy, Literature, and the Arts, Volume 7, Issue 2

  4. Monts Jura Jazz Festival

    CERN Multimedia

    Jazz Club

    2012-01-01

    The 5th edition of the "Monts Jura Jazz Festival" that will take place on September 21st and 22nd 2012 at the Esplanade du Lac in Divonne-les-Bains. This festival is organized by the "CERN Jazz Club" with the support of the "CERN Staff Association". This festival is a major musical event in the French/Swiss area and proposes a world class program with jazz artists such as D.Lockwood and D.Reinhardt. More information on http://www.jurajazz.com.

  5. Monts Jura Jazz Festival

    CERN Document Server

    2012-01-01

    The 5th edition of the "Monts Jura Jazz Festival" will take place at the Esplanade du Lac in Divonne-les-Bains, France on September 21 and 22. This festival organized by the CERN Jazz Club and supported by the CERN Staff Association is becoming a major musical event in the Geneva region. International Jazz artists like Didier Lockwood and David Reinhardt are part of this year outstanding program. Full program and e-tickets are available on the festival website. Don't miss this great festival!

  6. ELABORAZIONE DI UN QUESTIONARIO PER LA RILEVAZIONE DEI BISOGNI COMUNICATIVI DEGLI ADULTI IMMIGRATI

    Directory of Open Access Journals (Sweden)

    Annamaria Aquilino

    2012-02-01

    Full Text Available L’intensità del fenomeno migratorio in Italia suscita una riflessione critica sui bisogni linguistici di un  nuovo pubblico di apprendenti, spinti verso la conoscenza della lingua italiana da una forte esigenza di integrazione sociale. L’articolo presenta l’elaborazione di un questionario come strumento d’indagine essenziale per la rilevazione dei bisogni comunicativi degli immigrati adulti. Progettato nell’ambito di un corso di italiano L2  presso il CTP di Rozzano (Milano e sottoposto a un campione di 24 stranieri, il questionario si  è rivelato molto utile per la definizione del profilo dei singoli apprendenti e dell’intera classe che, caratterizzata da una grande differenziazione, non è sempre facile da gestire. L’interpretazione finale dei dati ha messo in luce non solo gli elementi di diversità ma ha anche permesso di cogliere alcuni tratti omogenei molto interessanti, indispensabili per la programmazione del percorso didattico, che sarà tanto efficace quanto più si adatterà alla realtà psicologica e socio-culturale degli apprendenti.     Questionnaire design to Survey the communicative needs of adult immigrants   Widespread immigration in Italy has brought about critical reflection on the linguistic needs of a new group of learners, highly motivated to learn the Italian language because of their strong need for social integration.  This article presents the designing of a questionnaire as an essential tool for surveying the communicative needs of adult immigrants.  Designed for an Italian L2 course held at the CTP in Rozzano (Milano and administered to 24 foreigners, the questionnaire was very useful for defining the profile of the single learners and the whole class group, which was dissimilar, and thus not the easiest to conduct.  The final interpretation of the data brought to light not only the elements of diversity but they also allowed us to recognize a few interesting common traits, essential for

  7. Strategic solid waste management in cities in Japan; La gestione strategica dei rifiuti solidi nelle citta giapponesi

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, M. [Okayama Univ. (Japan). Istituto di scienze naturali e tecnologiche

    2005-09-15

    SWM (Solid Waste Management) systems have always been compatible with the societal need at every point of time. In 1950's it was oriented towards maintaining public health standards mainly to control infectious diseases. While in 1970's energy generation was considered as the vital aspect of the system. In 1990's reduction in waste generation and recycling were officially incorporated in the waste management regulation. By enacting basic law in 2000 A.D.; the society is poised to become a recycling based society in its drive towards sustainable society. The document explain the actual solid waste strategic management, and related issues, in Japan. [Italian] Nel corso della storia la gestione dei rifiuti solidi si e sempre resa compatibile con le esigenze della societa espresse in quel determinato momento. Negli anni '50 la gestione era orientata al mantenimento di determinati standard di salute pubblica, principalmente rivolti al controllo della diffusione di malattie infettive, mentre negli anni '70 la produzione di energia dai rifiuti era considerato l'aspetto prioritario per la corretta risoluzione del problema gestionale dei rifiuti. Negli anni '90 la riduzione della produzione dei rifiuti e il loro riciclaggio sono stati inseriti, come principio, nei documenti per la regolamentazione della gestione dei rifiuti solidi. Con l'approvazione di specifiche normative quadro, a partire dai primi anni del 2000, la societa si avvia ad essere una societa basata sul riciclaggio, nel suo cammino verso la sostenibilita. Nel testo si esaminano i principali aspetti strategici della gestione dei rifiuti solidi, e problematiche annesse, in Giappone.

  8. Ripensare l’integrazione attraverso lo sport: la partecipazione sportiva a livello comunitario dei migranti turchi in Francia

    Directory of Open Access Journals (Sweden)

    William Gasparini

    2013-04-01

    Full Text Available Storicamente, la Francia è una terra d’immigrazione già a partire dal XIX secolo, periodo in cui lo sport moderno si è sviluppato. Progressivamente, i migranti e i loro discendenti si sono mescolati nello “creuset français” anche attraverso il contributo che lo sport ha dato all’integrazione sociale di numerosi sportivi migranti. Lo sport (e più particolarmente il calcio si presenta dunque come un terreno di studio particolarmente interessante sia sull’ambito delle espressioni di identità che sulle nuove forme del “vivere insieme”. L’articolo propone di mettere questi aspetti alla prova dei fatti analizzando la pratica sportiva dei migranti turchi, l’ultima grande onda di migranti in Francia e prima comunità di migranti in Europa. I dati empirici raccolti nell’ambito dei club turchi nella regione d’Alsazia (nord-est della Francia mostrano la presenza, chiara, di un raggruppamento comunitario che pone una serie di domande: tali raggruppamenti esistono poiché costretti o derivano da una scelta fatta in senso militante ? Da questo punto di vista, in che modo lo sport permette la loro coesione e la loro integrazione sociale ? Al di là della sola “identità turca” verrà dimostrato che l’esistenza di un club “turco” nell’ambito della società di accoglienza e la partecipazione sportiva a livello comunitario sono legati a dei fattori sociali e politici. Nel mettere in luce le cause sociali dei raggruppamenti sportivi, l’articolo intende inoltre superare l’opposizione classica tra la socializzazione comunitaria e la socializzazione societaria.

  9. Nuove Tecnologie per il Monitoraggio e la Gestione dei giardini storici

    Directory of Open Access Journals (Sweden)

    Maurizio Romani

    2012-07-01

    Full Text Available ItSotto la spinta dei cambiamenti socio-economici e di significativi progressi tecnici, la gestione dei giardini storici e degli spazi verdi in genere, sta vivendo un periodo di forte cambiamento ed evoluzione. Nel tentativo di razionalizzare l’uso delle risorse naturali e umane, nascono nuovi servizi che fanno intravedere la necessità di creare specifiche figure professionali, in grado di colmare in tempi rapidi il divario tra le potenzialità applicative offerte dalle nuove tecnologie e le diverse realtà operative, ancora legate all’uso di pratiche e metodologie tradizionali. Anche nel settore dei giardini e dei parchi storici è giunto il momento di approfondire i temi relativi alla loro conservazione e valorizzazione, che oggi sono strettamente legati a una concreta sostenibilità economica e ambientale delle pratiche di gestione e di promozione. Queste considerazioni sono state alla base di una serie di iniziative e di progetti promossi a livello nazionale ed europeo, che, grazie all’integrazione di strumenti ICT, SMART-Sensors e IA, in alcuni casi si sono concretizzati nella realizzazione di metodologie e soluzioni di grande interesse operativo.Le procedure e i criteri presentati in questo articolo sono il risultato dell’attività di ricerca e trasferimento tecnologico condotta dal CNR-IBIMET di Firenze negli ultimi dieci anni. Già nella sua versione prototipale, il sistema proposto mostra tutte le sue potenzialità di monitoraggio e supporto alle attività gestionali e manutentive degli spazi verdi, aprendo la strada a una progressiva automazione e virtualizzazione delle procedure (creazione di scenari, elementi essenziali per la successiva valorizzazione e promozione del bene a livello sociale e culturale.In particolare, oltre allo schema logico del sistema, si discutono alcune tra le funzioni di monitoraggio di maggiore interesse (disponibilità idrica, stato fitosanitario e fenologia, evidenziando quali siano i vantaggi

  10. Introduzione all'analisi qualitativa dei sistemi dinamici discreti e continui

    CERN Document Server

    Squassina, Marco

    2016-01-01

    Il testo è stato concepito per la struttura degli attuali corsi di laurea in Biologia, Matematica, Matematica Applicata, Ingegneria, Scienze Naturali e Mediche. Esso si concentra sugli aspetti qualitativi delle equazioni differenziali come limitatezza o illimitatezza delle soluzioni, esistenza o non esistenza di orbite periodiche, stabilità o instabilità dei punti di equilibrio, biforcazione del sistema al variare di un parametro, robustezza del sistema in presenza di perturbazioni. L'analisi qualitativa di sistemi dinamici discreti e continui è un argomento tecnicamente accessibile anche agli studenti di primo livello e consente di collegare, combinare ed esercitare nozioni che provengono dall'algebra, dal calcolo differenziale di base e dalla geometria elementare, stimolando l'intuizione matematica. Il volume si caratterizza per due aspetti: quello induttivo e quello figurativo. L'approccio induttivo si basa su un'ampia gamma di problemi risolti e pensati per introdurre, gradualmente, sia le conoscenze ...

  11. Making Sense of Dei Verbum : Moslem Reflections on The Relation Between Scripture and Tradition

    Directory of Open Access Journals (Sweden)

    Muhammad Modassir Ali

    2016-04-01

    Full Text Available Like all great religions of the world, Christianity is a religion steeped in revelation. It tries to convince its followers that it was through the process of revelation that God made Himself known both in the Old and New Testaments, climaxing in the saving action of Jesus Christ. Although this is the starting point of Christian revelation, it would surprise many to know that it was only in the last five centuries that Christians started debating the issue and nature of revelation. In the present article, we shall critically examine how Catholic Christians started perceiving the notion of revelation from the Second Vatican Council (1962-1965 as enshrined in the Constitution Dei Verbum of the Council and the issues that keep Catholics engaged with regard to it with particular focus upon the relation between Scripture and Tradition and the ensuing tensions.

  12. Antropologia visuale dei senza casa di Place de la Réunion

    Directory of Open Access Journals (Sweden)

    Sylvaine Conord

    2008-07-01

    Full Text Available Questo quartiere negli anni 90 veniva considerato una zona prevalentemente popolare. Oggi resta l’esempio emblematico di una Parigi popolare in mutamento. Questa ricerca è sempre attuale grazie al soggetto: i senza casa. La questione dei senza casa nella regione parigina non è risolta: migliaia di nuclei familiari attendono l'assegnazione di un alloggio abitabile. Numerose famiglie vivono in palazzi occupati, nonostante abbiano presentato presso i servizi pubblici la loro domanda da molti anni. Quindi, oltre ad un osservazione partecipante, questo lavoro pone l’accento "su una sociologia militante" che prende corpo attraverso le testimonianze e la partecipazione attiva dell'osservatrice alle diverse situazioni che vive e vede.

  13. Unionismo fiorentino negli anni Venti. L’Associazione Cristiana dei Giovani di Firenze

    Directory of Open Access Journals (Sweden)

    Letizia Pagliai

    2013-02-01

    Full Text Available Scarni sono i riferimenti storiografici sulla sezione fiorentina dell’Associazione Cristiana dei Giovani (ACDG, il corrispettivo italiano della Young Men’s Christian Association (YMCA, costituita dopo la Grande Guerra da quel Giovanni Battista Giorgini (1898-1971, noto piuttosto come talento imprenditoriale della ‘moda italiana’ negli anni del Miracolo economico. Sotto la presidenza di Giorgini (1924-1933, di formazione religiosa valdese, la sezione fiorentina dell’ACDG divenne punto di riferimento di tutta l’organizzazione italiana. Questo contributo, attraverso documenti esemplificativi, segue alcune fondamentali tappe e aspetti della vita dell’Associazione fino al 1931, quando il governo fascista ne intimò drasticamente lo scioglimento con ordinanza prefettizia.

  14. Multi-technique investigation of Roman decorated plasters from Villa dei Quintili (Rome, Italy)

    International Nuclear Information System (INIS)

    Crupi, Vincenza; Galli, Giuliana; La Russa, Mauro Francesco; Longo, Francesca; Maisano, Giacomo; Majolino, Domenico; Malagodi, Marco; Pezzino, Antonino; Ricca, Michela; Rossi, Barbara; Ruffolo, Silvestro Antonio

    2015-01-01

    Highlights: • A multi-technique non-invasive approach using portable instrumentation is proposed. • Due to the use of different techniques, pigments of same color were distinguished. • The experimental results shed light on the used painting methodologies. • The experimental results provided useful information for restoration processes. • This work is the first study of coloring matter used in Villa dei Quintili. - Abstract: In the present study, we investigated by the joint use of portable instrumentations, namely a handheld X-ray fluorescence (XRF) analyser and a portable Raman spectrometer, the painted surface of plasters withdrawn from different areas of an important Roman monumental complex, known as Villa dei Quintili (Rome, Italy), dated back to the first half of the 2nd century a.C. XRF and Raman measurements contributed to the identification of the pigments through the elemental and molecular composition, respectively. In particular, the multi-technique non-invasive approach proved to be crucial for distinguishing two different reddish pigments. In order to confirm and integrate XRF and Raman results, two micro-destructive laboratory methods, namely optical microscopy (OM) and scanning electron microscopy coupled with energy-dispersive X-ray spectrometry (SEM-EDS), were also employed on the same samples. All the experimental results shed light on the material characterizing the painted surface layer and the painting methodologies, providing in principle useful information for proper restoration processes. It is worth underlining that this experimental investigation takes part of a recent multidisciplinary study performed on this impressive archaeological site, aimed to characterize for the first time the monumental complex from an archaeometric point of view

  15. Multi-technique investigation of Roman decorated plasters from Villa dei Quintili (Rome, Italy)

    Energy Technology Data Exchange (ETDEWEB)

    Crupi, Vincenza, E-mail: vcrupi@unime.it [Dipartimento di Fisica e di Scienze della Terra, Università degli Studi di Messina, Viale Ferdinando Stagno d’Alcontres 31, 98166 Messina (Italy); Galli, Giuliana [Soprintendenza Speciale per i Beni Archeologici di Roma, Villa dei Quintili, via Appia Nuova 1092, 00197 Roma (Italy); La Russa, Mauro Francesco [Dipartimento di Biologia, Ecologia e Scienze della Terra (DiBEST), Università degli Studi della Calabria, Via Pietro Bucci, 87036 Arcavacata di Rende (Cs) (Italy); Longo, Francesca; Maisano, Giacomo; Majolino, Domenico [Dipartimento di Fisica e di Scienze della Terra, Università degli Studi di Messina, Viale Ferdinando Stagno d’Alcontres 31, 98166 Messina (Italy); Malagodi, Marco [Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100 Pavia (Italy); Pezzino, Antonino [Dipartimento di Scienze Biologiche, Geologiche e Ambientali—Sezione di Scienze della Terra, Università degli Studi di Catania, Corso Italia 57, 95129 Catania (Italy); Ricca, Michela [Dipartimento di Biologia, Ecologia e Scienze della Terra (DiBEST), Università degli Studi della Calabria, Via Pietro Bucci, 87036 Arcavacata di Rende (Cs) (Italy); Rossi, Barbara [Elettra – Sincrotrone Trieste, Strada Statale 14 km 163.5, Area Science 70 Park, 34149 Trieste (Italy); Dipartimento di Fisica, Università degli Studi di Trento, via Sommarive 14, 38123 Povo, Trento (Italy); Ruffolo, Silvestro Antonio [Dipartimento di Biologia, Ecologia e Scienze della Terra (DiBEST), Università degli Studi della Calabria, Via Pietro Bucci, 87036 Arcavacata di Rende (Cs) (Italy); and others

    2015-09-15

    Highlights: • A multi-technique non-invasive approach using portable instrumentation is proposed. • Due to the use of different techniques, pigments of same color were distinguished. • The experimental results shed light on the used painting methodologies. • The experimental results provided useful information for restoration processes. • This work is the first study of coloring matter used in Villa dei Quintili. - Abstract: In the present study, we investigated by the joint use of portable instrumentations, namely a handheld X-ray fluorescence (XRF) analyser and a portable Raman spectrometer, the painted surface of plasters withdrawn from different areas of an important Roman monumental complex, known as Villa dei Quintili (Rome, Italy), dated back to the first half of the 2nd century a.C. XRF and Raman measurements contributed to the identification of the pigments through the elemental and molecular composition, respectively. In particular, the multi-technique non-invasive approach proved to be crucial for distinguishing two different reddish pigments. In order to confirm and integrate XRF and Raman results, two micro-destructive laboratory methods, namely optical microscopy (OM) and scanning electron microscopy coupled with energy-dispersive X-ray spectrometry (SEM-EDS), were also employed on the same samples. All the experimental results shed light on the material characterizing the painted surface layer and the painting methodologies, providing in principle useful information for proper restoration processes. It is worth underlining that this experimental investigation takes part of a recent multidisciplinary study performed on this impressive archaeological site, aimed to characterize for the first time the monumental complex from an archaeometric point of view.

  16. MONTE and ANAL1

    International Nuclear Information System (INIS)

    Lupton, L.R.; Keller, N.A.

    1982-09-01

    The design of a positron emission tomography (PET) ring camera involves trade-offs between such things as sensitivity, resolution and cost. As a design aid, a Monte Carlo simulation of a single-ring camera system has been developed. The model includes a source-filled phantom, collimators, detectors, and optional shadow shields and inter-crystal septa. Individual gamma rays are tracked within the system materials until they escape, are absorbed, or are detected. Compton and photelectric interactions are modelled. All system dimensions are variable within the computation. Coincidence and singles data are recorded according to type (true or scattered), annihilation origin, and detected energy. Photon fluxes at various points of interest, such as the edge of the phantom and the collimator, are available. This report reviews the basics of PET, describes the physics involved in the simulation, and provides detailed outlines of the routines

  17. Frost in Charitum Montes

    Science.gov (United States)

    2003-01-01

    MGS MOC Release No. MOC2-387, 10 June 2003This is a Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) wide angle view of the Charitum Montes, south of Argyre Planitia, in early June 2003. The seasonal south polar frost cap, composed of carbon dioxide, has been retreating southward through this area since spring began a month ago. The bright features toward the bottom of this picture are surfaces covered by frost. The picture is located near 57oS, 43oW. North is at the top, south is at the bottom. Sunlight illuminates the scene from the upper left. The area shown is about 217 km (135 miles) wide.

  18. 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

    The variety of biomaterials applications in medical devices for substitution or functional integration of organs and tissues has remarkably grown. This has allowed an increased survival of patients affected by traumatic or pathologic events. Biomaterials growing variety and improvement were remarkable and constant over the last twenty years; this fact yielded important clinical effects in every medical area, especially in orthopaedics, cardiovascular surgery and dentistry. Performances of medical materials are evaluated according to their bio functionality and biocompatibility. These concepts are strongly connected: bio functionality refers to devices physical and mechanical properties which allow to perform a specific function. Several transformation methods and different processing technologies allow to obtain products having different physico-chemical and mechanical properties. Among them, chemical and physical stability, biocompatibility, possibility to undergo sterilisation process, control of gases and moisture permeability, control of biodegradation products, wear and fatigue resistance and toughness are the most relevant. Most of research efforts are devoted to improve reliability and last of biomaterials already used thanks to their bio functionality and biocompatibility. Expected developments of medial devices are associated with the design of bio artificial organs, where biomaterials act as a scaffold for the three-dimensional cells growth. [Italian] Il numero delle applicazioni dei biomateriali in dispositivi medici che sostituiscono od integrino dal punto di vista funzionale organi o tessuti e' cresciuto notevolmente. Questo ha portato ad un aumento della sopravvivenza dei pazienti colpiti da eventi patologici o traumatici. La crescita ed il perfezionamento dei biomateriali e' stata, infatti, nell'ultimo ventennio considerevole e costante ed ha avuto importanti ricadute cliniche in tutte le discipline mediche ed in particolare in ortopedia, in

  19. Cineturismo ed economia dei media: il caso dei film indiani girati in Italia / Cine-tourism and media economy: the case of Indian films shot in Italy

    Directory of Open Access Journals (Sweden)

    Marco Cucco

    2016-05-01

    Full Text Available A partire dalla fine degli anni Novanta l’industria audiovisiva indiana ha intensificato il numero di riprese effettuate all’estero, in particolar modo nei paesi occidentali. Questa migrazione di riprese rappresenta una grande occasione per i paesi ospitanti. L’industria cinematografica indiana, infatti, è la più prolifica al mondo e i suoi film riscuotono un ampio successo nel mercato domestico, con una quota di mercato stimata attorno al 90-95%. Ma il cinema indiano sta raccogliendo consensi anche all’estero, e i suoi spettatori non appartengono più solo alle classi popolari della società indiana, ma anche a quelle più facoltose, e dunque sono potenzialmente in grado di intraprendere viaggi verso i luoghi visti sul grande schermo. In virtù di queste considerazioni, il saggio analizza innanzitutto le ragioni che hanno spinto i produttori indiani a delocalizzare le proprie riprese all’estero, in particolar modo in Italia. Solo alla luce di questa analisi della domanda, infatti, è poi possibile comprendere come i territori possono aver intercettato le necessità dell’industria del cinema (e di riflesso anche i desideri del suo pubblico e divenire potenziali mete turistiche per gli spettatori indiani. Da un punto di vista metodologico, invece, il saggio ambisce a mostrare come gli studi condotti nell’ambito dell’economia dei media possano contribuire all’analisi dei fenomeni cineturistici e all’elaborazione di iniziative di successo in grado di intrecciare sviluppo territoriale e industrie creative.   Since the end of the 1990s Indian producers have been outsourcing an increasing number of film productions to Western countries, and this trend represents an important opportunity for the hosting territories. The Indian film industry is the main film producer in the world, and its movies achieve a wide success in the domestic market (where they hold a market share of about 90-95%. Moreover, from few years Indian films are

  20. Monte Carlo Methods in Physics

    International Nuclear Information System (INIS)

    Santoso, B.

    1997-01-01

    Method of Monte Carlo integration is reviewed briefly and some of its applications in physics are explained. A numerical experiment on random generators used in the monte Carlo techniques is carried out to show the behavior of the randomness of various methods in generating them. To account for the weight function involved in the Monte Carlo, the metropolis method is used. From the results of the experiment, one can see that there is no regular patterns of the numbers generated, showing that the program generators are reasonably good, while the experimental results, shows a statistical distribution obeying statistical distribution law. Further some applications of the Monte Carlo methods in physics are given. The choice of physical problems are such that the models have available solutions either in exact or approximate values, in which comparisons can be mode, with the calculations using the Monte Carlo method. Comparison show that for the models to be considered, good agreement have been obtained

  1. Bambini stranieri con bisogni speciali: rappresentazione della disabilità dei figli da parte delle famiglie migranti e degli insegnanti

    Directory of Open Access Journals (Sweden)

    Alain Goussot

    2010-02-01

    Full Text Available Interviste qualitative a genitori immigrati di bambine e bambini con disabilità: 5 interviste a Cesena e 4 interviste a Pescara. Somministrazione questionari ad insegnanti. La maggioranza dei bambini frequenta la scuola primaria e qualcuno la secondaria. Dalle interviste fatte ai genitori, in particolare le madri si hanno una serie di indicazioni sulla storia nella prima infanzia, su come i genitori vivono la disabilità dei propri figli in una condizione particolare che è quella dell'esperienza migratoria. Nella ricostruzione della storia migratoria abbiamo anche la ricostruzione delle storie cliniche dei bambini; alcuni con disabilità congenite (la maggior parte di tipo sensoriale (sordità, cecità , qualcuno con disabilità intellettiva, vi sono anche due casi con disabilità acquisite. la ricerca mette in evidenza quanto lo sguardo e il vissuto dei genitori sia fortemente condizionato da alcuni variabili: cultura di origine, condizioni e motivi dell'esperienza migratoria, evento traumatico che provoca la disabilità, condizioni dell'accoglienza in Italia, storia familiare, aspettative di guarigione dei genitori. Vi è anche una analisi del vissuto delle madri e del loro modo di concepire la relazione con il figlio disabile: vissuto e concezione fortemente condizionati dalla cultura della cura del proprio contesto di origine e dalle condizioni psico-affettive e sociali dell'inserimento della donna. Vi sono madri che arrivano in Italia pensando di curare e 'riparare' il figlio, vi è anche chi si trova in difficoltà nel combinare lo sguardo medico della neuropsichiatria infantile 'occidentale' con lo sguardo della cultura tradizionale del paese di provenienza. Quello che emerge dal lavoro è anche l'importanza del nesso madre-figlia/o disabile nonché la valorizzazione delle forme di maternage veicolate dalle madri migranti; forme che non coincidono sempre con quelle italiane. I casi di accompagnamento positivo sono dovuti all

  2. Lectures on Monte Carlo methods

    CERN Document Server

    Madras, Neal

    2001-01-01

    Monte Carlo methods form an experimental branch of mathematics that employs simulations driven by random number generators. These methods are often used when others fail, since they are much less sensitive to the "curse of dimensionality", which plagues deterministic methods in problems with a large number of variables. Monte Carlo methods are used in many fields: mathematics, statistics, physics, chemistry, finance, computer science, and biology, for instance. This book is an introduction to Monte Carlo methods for anyone who would like to use these methods to study various kinds of mathemati

  3. Il problem solving aritmetico: analisi dei processi cognitivi e metacognitivi e illustrazione del software "Risolvere problemi aritmetici"

    Directory of Open Access Journals (Sweden)

    Antonella D'Amico

    2010-01-01

    Full Text Available Il presente contributo esamina la letteratura relativa al problem solving matematico ed illustra uno strumento multimediale per la soluzione dei problemi aritmetici in bambini del secondo ciclo della scuola primaria e in bambini che presentano difficoltà in tale area. Il software presenta sia un modulo test, in cui vengono presentati problemi aritmetici di livello di difficoltà crescente, che un modulo di training. Il training è stato elaborato in base alle più recenti ricerche nell’area del problem solving matematico e prevede attività sulla comprensione, rappresentazione, categorizzazione e pianificazione del problema. Il training prevede inoltre particolari attività che stimolano l’uso della memoria di lavoro nella soluzione dei problemi. Il training si presenta come metacognitivamente orientato, in quanto i personaggi guida dell’ambientazione si configurano come compagni di studio che stimolano la riflessione metacognitiva rispetto alle attività affrontate.

  4. La nuova qualificazione dei docenti di religione: note a margine del D.P.R. n. 175 del 2012

    Directory of Open Access Journals (Sweden)

    Simona Attollino

    2013-12-01

    Full Text Available Il contributo, sottoposto a valutazione, è destinato alla pubblicazione negli atti del Convegno nazionale ADEC "Insegnamenti e insegnanti di religione nella scuola pubblica italiana" (Catanzaro, 25-27 ottobre 2012. SOMMARIO: 1. Il piano dei diritti: incompiute acquisizioni giurisprudenziali - 2. La qualificazione professionale dei docenti alla luce del D.P.R. n. 175 del 20 agosto 2012 - 3. Verso l’accentuazione del carattere culturale dell’I.R.C. - 4. L’ermeneutica del pluralismo sociale: un’offerta formativa aperta. ABSTRACT This essay regards the new professional status of teacher's religion in public school, in the light of juridical discipline approved in 2012. It analyses the rules as well as the abundant case-law in this field, underling the trend that considers the cultural value of catholicism teaching in public school in respect to the context of religious and social pluralism.

  5. Protesta dei ricercatori contro gli editori: politiche di prezzo insostenibili per la ricerca. Nel mirino Elsevier e Springer

    Directory of Open Access Journals (Sweden)

    Maria Chiara Pievatolo

    2012-02-01

    Full Text Available Ricopio, per chi non segue il nostro servizio Twitter, la notizia uscita ieri su Ciber Newsletter, su PLEIADI e altrove.  I mostruosi margini di profitto delle multinazionali dell’editoria scientifica sono riportati qui. Aggiornamento 2/2/2012:  la risposta di Springer è visibile qui; quella di Elsevier qui.  Qui c’è un’analisi dei loro argomenti. Aggiornamento 3/2/2012:  l’Economist si [...

  6. Ecce Agnus Dei, qui tollit peccata mundi. Sobre los símbolos de Jesucristo en la Edad Media

    Directory of Open Access Journals (Sweden)

    Torres Jiménez, Raquel

    2013-06-01

    Full Text Available The article deals with the symbolic meanings of Agnus Dei in the Middle Ages, its uses, reception and evolution, from the perspective of both religious and cultural history. It makes use of the analysis of the Church Fathers’ texts, Christian medieval literature, theological discourse, biblical exegesis in the medieval context, iconography, objects from churches, as well as the analysis of liturgy and mysticism. The text gives priority to an integral view of the symbol, which, beyond moral analogies, is able to explain the whole history of salvation: Agnus Dei evokes how the salvific facts of the past become present in the Eucharist and extend triumphantly into the future.El artículo trata de los significados simbólicos del Agnus Dei en la Edad Media, sus usos, recepciones y evolución, desde la perspectiva de la historia religiosa y de la historia cultural. Se sirve del análisis de textos de los Padres de la Iglesia, literatura cristiana medieval, discursos teológicos, exégesis bíblica en el contexto medieval, iconografía, objetos de iglesias, liturgia, mística. Se privilegia la visión integral de este símbolo, que, más allá de analogías morales, tiene capacidad para explicar toda la historia de la salvación: el Agnus Dei evoca cómo los hechos salvíficos del pasado se hacen presentes en la eucaristía y se proyectan triunfalmente hacia el futuro.

  7. [Voluntary mediation in healthcare disputes: the experience of the "Fondazione IRCCS Istituto Nazionale dei Tumori" in Milan (Italy)].

    Science.gov (United States)

    Tereanu, Carmen; Bettega, Silvia; Regalia, Enrico; Mazza, Roberto; Greco, Margherita; Lozza, Laura; Saita, Luigi; Borreani, Claudia; Quattrocolo, Alberto

    2014-01-01

    The "Fondazione IRCCS Istituto Nazionale dei Tumori" ( National Tumour Institute) in Milan (Italy) offers mediation services aimed at restoring communication between patients and healthcare professionals, when their relationship has been altered by a conflict during the diagnosis or treatment process. A method derived from transformative mediation is used. The purpose of mediation is not to examine clinical aspects, nor to identify who is right and who is wrong. Individual sessions are often sufficient to reduce litigation.

  8. Solid municipal waste management in a mediterranean sea; La gestione dei rifiuti solidi urbani in un'area mediterranea

    Energy Technology Data Exchange (ETDEWEB)

    Falcetta, M. [Ministero degli Esteri, Direzione Generale per la Cooperazione e lo Sviluppo, Rome (Italy); Grauso, S. [ENEA, Divisione Caratterizzazione del Territorio, S. Maria di Galeria, Rome (Italy); Pietrelli, L.; Sgroi, S. [ENEA, Divisione Ingegneria Ambientale, S. Maria di Galeria, Rome (Italy)

    2001-02-01

    Development and results of a co-operative project on solid waste management in Palestine. The project was the first part of a broader programme of environmental co-operation between Italy and the Palestinian National Authority. [Italian] Lo sviluppo e i risultati raggiunti da un progetto di cooperazione italo-palestinese sulla gestione dei rifiuti solidi urbani in Palestina. Il progetto si presta ad essere replicato nei Paesi in via di sviluppo mediterranea.

  9. Indagini su conoscenze e comportamenti dei medici in tema di prevenzione delle neoplasie del cavo orale: primi risultati

    OpenAIRE

    G. Nicotera; A. Di Stasio; F. Angelillo

    2003-01-01

    Obiettivi: l’indagine si propone di valutare il livello di conoscenze ed i comportamenti dei medici italiani in merito alla prevenzione delle neoplasie del cavo orale.

    Metodi: lo studio è stato effettuato mediante l’invio postale ad un campione casuale di 500 di medici di medicina generale della regione Calabria di un questionario con 38 domande strutturate in 3 sezioni: caratteristiche anagrafiche e lavorati...

  10. Climatic change impacts on italian agricultural ecosystems; Impatto dei cambiamenti climatici negli agroecosistemi italiani

    Energy Technology Data Exchange (ETDEWEB)

    Maracchi, G.; Crisci, A. [Consiglio Nazionale delle Ricerche, International Air Transport Association, Florence (Italy)

    2001-06-01

    In the last decade it was found specific climatological trends due to increasing available energy in climatic system in Mediterranean area. Such trends mainly concern the modification in extreme events frequency about rainfall distribution and intensity. In late summer and at the beginning of the autumn it was a significant positive trend in Sea Surface Temperature that leads to more severe rainfall events. During winter time it was a decrease of rainfall and an increase of dry periods. Increasing cloudiness in springtime leads a decrease in the number of frost days. In late springtime it was again a growth of heavy rainfall. All together these phenomena modify the phenology of the cultivated plants lead to an increment of winter and summer forest's fire and to the modification of forest productivity mainly due to a winter drought. [Italian] Nell'ultima decade a causa dell'incremento di energia disponibile nel sistema climatico mondiale sono stati misurati trend climatologici specifici per l'area mediterranea. Tali trend consistono prevalentemente in una crescita degli eventi estremi legati alle precipitazioni in termini di intensita' e distribuzione e alle temperature in termini di distribuzione. Alla fine dell'estate e all'inizio dell'autunno si assiste ad un aumento della temperatura del mare (anomalia termica positiva) che da' luogo ad un incremento degli eventi di precipitazione con un quantitativo cumulato superiore a 60 mm causa, questi ultimi, di frequenti fenomeni alluvionali. Durante l'inverno si assiste invece ad una diminuzione delle precipitazioni con un aumento dei periodi asciutti. In primavera aumenta la nuvolosita' con una parallela diminuzione dei giorni con temperatura minima giornaliera inferiore a 0{sup 0}C. Infine nella tarda primavera si assite ad un anticipo delle fasi di sviluppo delle colture, ad un incremento degli incendi boschivi estivi ed invernali, ad una modifica della tipologia

  11. Advanced Multilevel Monte Carlo Methods

    KAUST Repository

    Jasra, Ajay; Law, Kody; Suciu, Carina

    2017-01-01

    This article reviews the application of advanced Monte Carlo techniques in the context of Multilevel Monte Carlo (MLMC). MLMC is a strategy employed to compute expectations which can be biased in some sense, for instance, by using the discretization of a associated probability law. The MLMC approach works with a hierarchy of biased approximations which become progressively more accurate and more expensive. Using a telescoping representation of the most accurate approximation, the method is able to reduce the computational cost for a given level of error versus i.i.d. sampling from this latter approximation. All of these ideas originated for cases where exact sampling from couples in the hierarchy is possible. This article considers the case where such exact sampling is not currently possible. We consider Markov chain Monte Carlo and sequential Monte Carlo methods which have been introduced in the literature and we describe different strategies which facilitate the application of MLMC within these methods.

  12. Advanced Multilevel Monte Carlo Methods

    KAUST Repository

    Jasra, Ajay

    2017-04-24

    This article reviews the application of advanced Monte Carlo techniques in the context of Multilevel Monte Carlo (MLMC). MLMC is a strategy employed to compute expectations which can be biased in some sense, for instance, by using the discretization of a associated probability law. The MLMC approach works with a hierarchy of biased approximations which become progressively more accurate and more expensive. Using a telescoping representation of the most accurate approximation, the method is able to reduce the computational cost for a given level of error versus i.i.d. sampling from this latter approximation. All of these ideas originated for cases where exact sampling from couples in the hierarchy is possible. This article considers the case where such exact sampling is not currently possible. We consider Markov chain Monte Carlo and sequential Monte Carlo methods which have been introduced in the literature and we describe different strategies which facilitate the application of MLMC within these methods.

  13. Monte Carlo simulation for IRRMA

    International Nuclear Information System (INIS)

    Gardner, R.P.; Liu Lianyan

    2000-01-01

    Monte Carlo simulation is fast becoming a standard approach for many radiation applications that were previously treated almost entirely by experimental techniques. This is certainly true for Industrial Radiation and Radioisotope Measurement Applications - IRRMA. The reasons for this include: (1) the increased cost and inadequacy of experimentation for design and interpretation purposes; (2) the availability of low cost, large memory, and fast personal computers; and (3) the general availability of general purpose Monte Carlo codes that are increasingly user-friendly, efficient, and accurate. This paper discusses the history and present status of Monte Carlo simulation for IRRMA including the general purpose (GP) and specific purpose (SP) Monte Carlo codes and future needs - primarily from the experience of the authors

  14. Geology of Maxwell Montes, Venus

    Science.gov (United States)

    Head, J. W.; Campbell, D. B.; Peterfreund, A. R.; Zisk, S. A.

    1984-01-01

    Maxwell Montes represent the most distinctive topography on the surface of Venus, rising some 11 km above mean planetary radius. The multiple data sets of the Pioneer missing and Earth based radar observations to characterize Maxwell Montes are analyzed. Maxwell Montes is a porkchop shaped feature located at the eastern end of Lakshmi Planum. The main massif trends about North 20 deg West for approximately 1000 km and the narrow handle extends several hundred km West South-West WSW from the north end of the main massif, descending down toward Lakshmi Planum. The main massif is rectilinear and approximately 500 km wide. The southern and northern edges of Maxwell Montes coincide with major topographic boundaries defining the edge of Ishtar Terra.

  15. Adjoint electron Monte Carlo calculations

    International Nuclear Information System (INIS)

    Jordan, T.M.

    1986-01-01

    Adjoint Monte Carlo is the most efficient method for accurate analysis of space systems exposed to natural and artificially enhanced electron environments. Recent adjoint calculations for isotropic electron environments include: comparative data for experimental measurements on electronics boxes; benchmark problem solutions for comparing total dose prediction methodologies; preliminary assessment of sectoring methods used during space system design; and total dose predictions on an electronics package. Adjoint Monte Carlo, forward Monte Carlo, and experiment are in excellent agreement for electron sources that simulate space environments. For electron space environments, adjoint Monte Carlo is clearly superior to forward Monte Carlo, requiring one to two orders of magnitude less computer time for relatively simple geometries. The solid-angle sectoring approximations used for routine design calculations can err by more than a factor of 2 on dose in simple shield geometries. For critical space systems exposed to severe electron environments, these potential sectoring errors demand the establishment of large design margins and/or verification of shield design by adjoint Monte Carlo/experiment

  16. Monte Carlo theory and practice

    International Nuclear Information System (INIS)

    James, F.

    1987-01-01

    Historically, the first large-scale calculations to make use of the Monte Carlo method were studies of neutron scattering and absorption, random processes for which it is quite natural to employ random numbers. Such calculations, a subset of Monte Carlo calculations, are known as direct simulation, since the 'hypothetical population' of the narrower definition above corresponds directly to the real population being studied. The Monte Carlo method may be applied wherever it is possible to establish equivalence between the desired result and the expected behaviour of a stochastic system. The problem to be solved may already be of a probabilistic or statistical nature, in which case its Monte Carlo formulation will usually be a straightforward simulation, or it may be of a deterministic or analytic nature, in which case an appropriate Monte Carlo formulation may require some imagination and may appear contrived or artificial. In any case, the suitability of the method chosen will depend on its mathematical properties and not on its superficial resemblance to the problem to be solved. The authors show how Monte Carlo techniques may be compared with other methods of solution of the same physical problem

  17. Il nuovo ortofotopiano del Comune di Venezia nell’Infrastruttura dei dati Territoriali di Base (ITB

    Directory of Open Access Journals (Sweden)

    Paolo Barbieri

    2006-06-01

    Full Text Available Il Comune di Venezia, nell’ambito delle attività per lo sviluppo del proprio Sistema Informativo Territoriale, ha messo a punto e avviato a realizzazione uno specifico progetto per la costruzione di un’Infrastruttura di dati Territoriali di Base (ITB. Il progetto, che ha visto il coinvolgimento dei vari Uffici comunali interessati, dellaRegione del Veneto e dell’Agenzia del Territorio, si è sviluppato a partire dal 2002 con gli studi di fattibilità, cui è seguita nel 2003 la fase della progettazione esecutiva e quindi, a partire dal 2004, dell’attuazione. Attualmente le componenti dell’infrastruttura sono state realizzate e si sta procedendo alla definizione di una piattaforma tecnologica per la gestione e l’utilizzo della ITB, basata su di un Geo-DBMS e meccanismi di interoperabilità, con l’obiettivo di interfacciare le diverse applicazioni gestionali presenti in Comune. Nel presente articolo si intende presentare il modello concettuale di riferimento ed evidenziare, in particolare, il ruolo in esso svolto dalle immagini ortofotografiche.

  18. Architettura e magnificenza nella Palermo del primo Cinquecento : il prospetto denominato di Santa Eulalia dei Catalani

    Directory of Open Access Journals (Sweden)

    Fulvia Scaduto

    2006-01-01

    Full Text Available A una attenta analisi, la misteriosa facciata nota come prospetto della chiesa di Santa Eulalia dei Catalani a Palermo risulta essere il frammento superstite di una Loggia realizzata, e forse mai completata, a partire dalla fine degli anni trenta del Cinquecento. La comunità e i banchieri catalani presenti a Palermo sono certamente i promotori di una architettura all’antica che si avvia dopo il trionfale ingresso dell’imperatore Carlo V in città nel 1535. Lo studio di questo edificio e le ipotesi sulla spazialità interna risultano estremamente illuminanti per comprendere una fase architettonica ancora poco nota nella capitale del Regno di Sicilia.At a careful analysis, the mysterious façade known as the front of St. Eulalia of the Catalans church in Palermo turns out to be the surviving fragment of a Loggia, wich construction, maybe never ended, started in the 153’s. The Catalan community and bankers living in Palermo are doubtless the promoters of an architecture in ancient style, starting after the triumphal entrance in the city of the emperor Carlo V in 1535. The study of this building and the hypothesis about its interior space are extremely evealing to understand an architectonical phase in the capital of Sicilian Reign still not well known.

  19. Evaluation of the structural health status of the covering of Villa dei Misteri in Pompeii

    International Nuclear Information System (INIS)

    Carpani, B.

    2015-01-01

    'Villa dei Misteri' is one of the most visited monuments of the archaeological area of Pompeii. It is sited just outside the ancient city and takes its name from the superb frescoes cycle depicting ritual mysteries. The ancient masonry structures, dating from the 2. century B.C. to the Vesuvian eruption, are protected from weathering by modern roofs built in various materials (reinforced concrete, timber, steel). After the collapse, in the fall of 2012, of a decayed timber beam, the Suprintendence decided to carry out, in collaboration with ENEA, a detailed survey of all the covering structures to evaluate its health status and to assess the safety condition of the monument. This paper illustrates the research methodology developed, which is based on a multidisciplinary approach including historical research, geometrical and structural surveys, damage assessment based on both in situ and laboratory diagnostic test, UAV (Unmanned Aerial Vehicles) remote sensing to inspect area and coverings not easy to reach in safe, and, as basis for seismic safety assessment, ambient vibration measurement to characterize the dynamic response of the soil and of the most relevant structural components of the 'Villa'. The preliminary results of the first stage of the diagnostic campaign are also presented.

  20. 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...

  1. Interrogarsi sull’umano. Questione antropologica e scommessa su una possibile ritessitura dei saperi

    Directory of Open Access Journals (Sweden)

    Giovanni Grandi

    2013-12-01

    Full Text Available Questioning What Human is. The Anthropological Question and a Proposal for a New Fabric of Understanding - The essay reviews the first four issues of the Yearbook of Philosophical Studies "Anthropologica" – La differenza umana. Riduzionismo e antiumanesimo (2009, La struttura dei legami (2010, La vita in questione. Potenziamento o compimento dell'essere umano? (2011, Chi dice io? Riflessioni sull’identità personale (2012 – and introduces the research program developed by the interdisciplinary group of study promoted by the Jacques Maritain Study Centre. According to the perspective of Classical and Christian Thought, and to contemporary developments in the personalist tradition, the authors deal with many issues of the current debate on the human being and human condition. The main place in the discussion is occupied by the critical deal with different forms of anti-humanism, that directly or indirectly arise in the areas of Life Sciences, especially where there are new possibilities of intervention on human nature, opened by technological development. Investigations, always punctual and documented, analyze issues in a clear way, reporting limits, but also resources and stimulating suggestions coming from the perspectives examined.

  2. Multilevel sequential Monte Carlo samplers

    KAUST Repository

    Beskos, Alexandros; Jasra, Ajay; Law, Kody; Tempone, Raul; Zhou, Yan

    2016-01-01

    In this article we consider the approximation of expectations w.r.t. probability distributions associated to the solution of partial differential equations (PDEs); this scenario appears routinely in Bayesian inverse problems. In practice, one often has to solve the associated PDE numerically, using, for instance finite element methods which depend on the step-size level . hL. In addition, the expectation cannot be computed analytically and one often resorts to Monte Carlo methods. In the context of this problem, it is known that the introduction of the multilevel Monte Carlo (MLMC) method can reduce the amount of computational effort to estimate expectations, for a given level of error. This is achieved via a telescoping identity associated to a Monte Carlo approximation of a sequence of probability distributions with discretization levels . ∞>h0>h1⋯>hL. In many practical problems of interest, one cannot achieve an i.i.d. sampling of the associated sequence and a sequential Monte Carlo (SMC) version of the MLMC method is introduced to deal with this problem. It is shown that under appropriate assumptions, the attractive property of a reduction of the amount of computational effort to estimate expectations, for a given level of error, can be maintained within the SMC context. That is, relative to exact sampling and Monte Carlo for the distribution at the finest level . hL. The approach is numerically illustrated on a Bayesian inverse problem. © 2016 Elsevier B.V.

  3. Multilevel sequential Monte Carlo samplers

    KAUST Repository

    Beskos, Alexandros

    2016-08-29

    In this article we consider the approximation of expectations w.r.t. probability distributions associated to the solution of partial differential equations (PDEs); this scenario appears routinely in Bayesian inverse problems. In practice, one often has to solve the associated PDE numerically, using, for instance finite element methods which depend on the step-size level . hL. In addition, the expectation cannot be computed analytically and one often resorts to Monte Carlo methods. In the context of this problem, it is known that the introduction of the multilevel Monte Carlo (MLMC) method can reduce the amount of computational effort to estimate expectations, for a given level of error. This is achieved via a telescoping identity associated to a Monte Carlo approximation of a sequence of probability distributions with discretization levels . ∞>h0>h1⋯>hL. In many practical problems of interest, one cannot achieve an i.i.d. sampling of the associated sequence and a sequential Monte Carlo (SMC) version of the MLMC method is introduced to deal with this problem. It is shown that under appropriate assumptions, the attractive property of a reduction of the amount of computational effort to estimate expectations, for a given level of error, can be maintained within the SMC context. That is, relative to exact sampling and Monte Carlo for the distribution at the finest level . hL. The approach is numerically illustrated on a Bayesian inverse problem. © 2016 Elsevier B.V.

  4. Monte Carlo simulation of experiments

    International Nuclear Information System (INIS)

    Opat, G.I.

    1977-07-01

    An outline of the technique of computer simulation of particle physics experiments by the Monte Carlo method is presented. Useful special purpose subprograms are listed and described. At each stage the discussion is made concrete by direct reference to the programs SIMUL8 and its variant MONTE-PION, written to assist in the analysis of the radiative decay experiments μ + → e + ν sub(e) antiνγ and π + → e + ν sub(e)γ, respectively. These experiments were based on the use of two large sodium iodide crystals, TINA and MINA, as e and γ detectors. Instructions for the use of SIMUL8 and MONTE-PION are given. (author)

  5. 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.

  6. Strategije drevesnega preiskovanja Monte Carlo

    OpenAIRE

    VODOPIVEC, TOM

    2018-01-01

    Po preboju pri igri go so metode drevesnega preiskovanja Monte Carlo (ang. Monte Carlo tree search – MCTS) sprožile bliskovit napredek agentov za igranje iger: raziskovalna skupnost je od takrat razvila veliko variant in izboljšav algoritma MCTS ter s tem zagotovila napredek umetne inteligence ne samo pri igrah, ampak tudi v številnih drugih domenah. Čeprav metode MCTS združujejo splošnost naključnega vzorčenja z natančnostjo drevesnega preiskovanja, imajo lahko v praksi težave s počasno konv...

  7. Il riutilizzo dei nuraghi tra Marmilla e Sarcidano in epoca romana

    Directory of Open Access Journals (Sweden)

    Enrico Trudu

    2017-01-01

    Full Text Available Riassunto: Il riutilizzo dei nuraghi in epoca romana appare un fenomeno numericamente rilevante e caratteristico delle dinamiche di occupazione delle aree rurali della Sardegna, che risulta ancora di difficile inquadramento. Sono attestate, infatti, diverse finalità di riutilizzo ma non è stato finora possibile tracciare un quadro ipotetico delle modalità e delle finalità complessive di tale riuso, che viene tradizionalmente legato a una continuità di frequentazione di comunità locali e a un processo di acculturazione e romanizzazione più o meno profonda degli etnici indigeni. Nel presente contributo si presentano i dati relativi alle attestazioni di riutilizzo in un’area compresa tra Marmilla e Sarcidano, particolarmente importante per la sua collocazione geografica e strategica, nella quale si evidenzia un interessante quadro diacronico delle dinamiche di riutilizzo e della loro matrice culturale. Abstract: Reuse of nuraghi in Roman age appears as a numerically significant phenomenon and  a characteristic of settlement dynamics in Sardinian rural areas, but  still difficult to classify. Different purposes of reuse are known but has not yet been possible to draw a picture of the mode of operation and of the objectives of such re-use, which is traditionally linked to a continuity of  use related to local communities and to a process of acculturation and Romanization of indigenous ethnic groups. In this paper we present the reuse exemples of an area between Marmilla and Sarcidano, particularly important for its geographical and strategic position, in which is possible to highlight an interesting diachronic picture of reuse dynamics and of the cultural matrix of the phenomenon.

  8. «PALPITANTE, RIDENTE, NOSTALGICA, APPASSIONATA»: LA LINGUA DEI DIARI DI ANTONIA POZZI

    Directory of Open Access Journals (Sweden)

    Giuseppe Sergio

    2013-01-01

    Full Text Available L’articolo prende in considerazione i diari della poetessa e fotografa Antonia Pozzi, nata nel 1912 e morta suicida nel 1938. Essi si presentano come particolarmente eterogenei, certo per la tipica “cavità” della forma diaristica, ma anche in ragione delle tre distinte tranches in cui vengono stesi: il Quaderno dal ’25 al ’27; le Note di viaggio nel 1933; il Diario intimo vero e proprio fra il ’35 e l’anno della morte. L’analisi si concentra sulle diverse fisionomie linguistiche dei diari e sulla funzione che Antonia Pozzi affida loro, funzione che è sia esistenziale che poetica. Nel Diario intimo, in particolare, la scrittura infatti si configura da un lato come pharmacon, pur elevandosi volentieri dalle contingenze a questioni filosofiche e letterarie, dall’altro come luogo in cui fissare immagini, riflessioni e impressioni in vista di una futura rielaborazione poetica, come dimostrano precise rispondenze fra gli uni e l’altra.  “Throbbing, laughing, nostalgic, passionate”language in the diaries of Antonia Pozzi The article studies the diaries of the poet and photographer Antonia Pozzi, born in 1912 and who committed suicide in 1938. They seem very heterogeneous due to their typical “cavity” form, but also because of their division into three separate sections: there are her notebooks from ’25 to ’27, travel notes from 1933, the intimate diary written between the '35 and the year of her death. The analysis focuses on the different language of the diaries and the functions that Antonia Pozzi gives them, functions that are both existential and poetic. In the intimate diary, in particular, the writing is on the one hand configured as a pharmacon, rising above contingencies to address philosophical and literary issues, but it is also a place to fix images, reflections and impressions in view of a future poetic revision, as shown by the precise correspondences present between them. 

  9. [Production of accentuated personality traits in baroque opera : Opera buffa Arcifanfano-Re dei matti (1749)].

    Science.gov (United States)

    Brunner, J; Hirsch, T; Steger, F

    2016-05-01

    Madness served primarily as a form of amusement for the spectators in operas of the seventeenth century. This representation was far removed from clinical reality. This circumstance changed in the eighteenth century at the time when tragic madness emerged in numerous operas. The opera buffa Arcifanfano-Re dei matti (Arcifanfano-King of fools, premiered in 1749 in Venice, text by Carlo Goldoni 1707-1793 and music by Baldassare Galuppi 1706-1785), which continuously enacts a realm of fools and is meant to appear amusing, is riddled with psychopathological abnormalities for which a retrospective diagnosis is methodologically rejected. However, the opera presents many subjects for working out a typology of fools based on outlasting personality traits of the protagonists. The libretto is investigated. A musical analysis is spared. The conceptualized typology of fools in the opera, which is oriented towards the seven main vices or deadly sins serves, in the tradition of moral satire, to critically hold up a mirror to the audience to reflect their own vices by an amusing characterization of the latter. Historically classified, the treatment of fools by means of isolation, custody, locking up in cages as well as authoritarian measures of submission reflects the custom in those days before humanizing the treatment of people with mental illness in the course of the Enlightenment and the French Revolution. The opera Arcifanfano is essentially characterized by continuous madness. A typology of the fools can be worked out from the precise depiction of the personalities. A mirror is held up to the spectators in terms of vices, in the tradition of the contemporary baroque opera. At the same time, the opera can be classified psychiatrically and historically as a seismograph of its time when in the seventeenth and eighteenth centuries people with mental illness were isolated and incarcerated.

  10. Il servizio di EV-mobile ed i suoi utenti: un approccio metodologico all’analisi dei loro comportamenti

    Directory of Open Access Journals (Sweden)

    Ugo Contino

    2012-07-01

    Full Text Available ItLa possibilità di accedere al Web mediante dispositivi mobili, ad esempio tablet o smartphone, ha comportato la creazione di ulteriori portali, semplificati, che consentono di diffondere contenuti ed informazione in maniera rapida ai propri utenti. Nel caso del servizio di Emeroteca Virtuale Mobile si è voluto ampliare la gamma dei servizi offerti all’utenza, includendo una piattaforma che fosse navigabile attraverso i browser disponibili nei moderni smart phone. L’analisi dei loro comportamenti ci ha permesso di verificare quanto gli utenti preferiscano i contesti mobili come ambienti di rapida verifica delle novità disponibili in Emeroteca, relativamente ai periodici di loro interesse (4 a 1 è infatti il rapporto tra la navigazione e la ricerca dei contenuti. Ciò chiarisce il ruolo che tale servizio sta assumendo nel contesto dell’Emeroteca, non alternativo a quello classico, ma, pur se ancora non privo di una sua connotazione sperimentale, certamente complementare a quest’ultimo.EnThe diffusion of the so called smart-phone and tablet among WEB users community caused a growth in the offering of specific portals, simplified comparing to the classic ones, but capable of a more direct and fast information flow towards their own users. Emeroteca Virtuale service too has been provided of a specific “mobile” portal dedicated to people having a smart-phone as a web access tool. Last two years usage data analysis on this service has revealed a peculiar behavior of Emeroteca Virtuale Mobile users: they tend to use the service as a rapid check of new entries in Emeroteca (issues or articles, specifically for those e-journals they are interested in (the ratio between browsing and search actions is 4 to 1. This clarifies better the role this “mobile” service is having versus the classical one: it is not an alternative to it, but a complementary way to get information from Emeroteca.

  11. Composition and stratigraphy of the paint layers: investigation on the Madonna dei Fusi by ion beam analysis techniques

    Science.gov (United States)

    Grassi, N.

    2005-06-01

    In the framework of the extensive study on the wood painting "Madonna dei fusi" attributed to Leonardo da Vinci, Ion Beam Analysis (IBA) techniques were used at the Florence accelerator laboratory to get information about the elemental composition of the paint layers. After a brief description of the basic principle and the general features of IBA techniques, we will illustrate in detail how the analysis allowed us to characterise the pigments of original and restored areas and the substrate composition, and to obtain information about the stratigraphy of the painting, also providing an estimate of the paint layer thickness.

  12. Quando la Generazione Erasmus incontra la Generazione Precaria. La mobilità transnazionale dei giovani italiani e spagnoli

    Directory of Open Access Journals (Sweden)

    Luca Raffini

    2014-07-01

    Full Text Available Uno dei più importanti risultati del processo di integrazione europea è la costruzione di uno spazio transnazionale in cui i cittadini europei possono muoversi liberamente. La mobilità favorisce dinamiche di europeizzazione dal basso –o di europeizzazione orizzontale–, e lo sviluppo di pratiche cross-nazionali e amplia le risorse individuali e relazionali a disposizione dei giovani per progettare i propri percorsi professionali e di vita. La Generazione Erasmus definisce giovani socializzati a un humus culturale transnazionale e fortemente identificati con l’Europa. Nell’attuale contesto di crisi economica, a sperimentare la mobilità sono sempre più i giovani altamente qualificati dei paesi dell’Europa del sud, quale strategia individuale cui ricorrere per trovare risposta ai problemi connessi alla precarietà, alla disoccupazione, alla sotto-qualificazione degli impieghi. Il risultato è che la mobilità può assumere il volto di un obbligo, più che di una scelta e, più che dinamiche di europeizzazione orizzontale, può favorire una “fuga dei cervelli” dai paesi del sud ai paesi del centro e del nord Europa. L’articolo, focalizzandosi sui giovani italiani e spagnoli, si chiede cosa succede quando la Generazione Erasmus incontra la Generazione Precaria, analizzando cause ed effetti della mobilità, sul piano micro e macro sociale e sul piano politico. | One of the main achievement of the European integration process is the making of a transnational space where European citizens can freely circulate. Mobility promotes a kind of bottom-up, or horizontal europeanization, and the spread of cross-national practices. It also contributes to a widening in the individual and relational resources available to youth to carry out their professional and personal life projects. The so called Erasmus Generation, defines young peoples socialized to a transnational cultural humus and highly identified with Europe. Indeed, in the current

  13. Playmarche: un distretto regionale dei beni culturali 2.0 / Playmarche: a 2.0 regional cultural heritage district

    Directory of Open Access Journals (Sweden)

    Roberto Perna

    2015-08-01

    The paper aims to provide a brief overview on the objectives and methods of realization of the project PlayMarche: un Distretto regionale dei beni culturali 2.0. The project – presented by the University of Macerata and approved in the call for the DCE of the Marche Region – aims to develop and consolidate the economic sector of the ICT technologies applied to communication, dissemination and innovative exploitation of cultural heritage. It focuses, in particular, on the supply chain both of edutainment and entertainment, with consequences in terms of job creation in sectors with high innovation and economic sustainability.

  14. Premessa del progetto esecutivo del piano pilota per la conservazione dei beni culturali in Umbria / Introduction to the executive project of the Pilot plan for the “programmed conservation” of cultural heritage in Umbria Region

    Directory of Open Access Journals (Sweden)

    Giovanni Urbani

    2011-11-01

    Il primo testo prescelto, che appare ancora oggi sostanzialmente attuale e predittivo rispetto ai problemi contemporanei della gestione dei beni culturali, è lapremessa al progetto esecutivo del piano pilota per la conservazione dei beni culturali della regione Umbria, elaborato da Giovanni Urbani nel 1975.

  15. Is Monte Carlo embarrassingly parallel?

    Energy Technology Data Exchange (ETDEWEB)

    Hoogenboom, J. E. [Delft Univ. of Technology, Mekelweg 15, 2629 JB Delft (Netherlands); Delft Nuclear Consultancy, IJsselzoom 2, 2902 LB Capelle aan den IJssel (Netherlands)

    2012-07-01

    Monte Carlo is often stated as being embarrassingly parallel. However, running a Monte Carlo calculation, especially a reactor criticality calculation, in parallel using tens of processors shows a serious limitation in speedup and the execution time may even increase beyond a certain number of processors. In this paper the main causes of the loss of efficiency when using many processors are analyzed using a simple Monte Carlo program for criticality. The basic mechanism for parallel execution is MPI. One of the bottlenecks turn out to be the rendez-vous points in the parallel calculation used for synchronization and exchange of data between processors. This happens at least at the end of each cycle for fission source generation in order to collect the full fission source distribution for the next cycle and to estimate the effective multiplication factor, which is not only part of the requested results, but also input to the next cycle for population control. Basic improvements to overcome this limitation are suggested and tested. Also other time losses in the parallel calculation are identified. Moreover, the threading mechanism, which allows the parallel execution of tasks based on shared memory using OpenMP, is analyzed in detail. Recommendations are given to get the maximum efficiency out of a parallel Monte Carlo calculation. (authors)

  16. Is Monte Carlo embarrassingly parallel?

    International Nuclear Information System (INIS)

    Hoogenboom, J. E.

    2012-01-01

    Monte Carlo is often stated as being embarrassingly parallel. However, running a Monte Carlo calculation, especially a reactor criticality calculation, in parallel using tens of processors shows a serious limitation in speedup and the execution time may even increase beyond a certain number of processors. In this paper the main causes of the loss of efficiency when using many processors are analyzed using a simple Monte Carlo program for criticality. The basic mechanism for parallel execution is MPI. One of the bottlenecks turn out to be the rendez-vous points in the parallel calculation used for synchronization and exchange of data between processors. This happens at least at the end of each cycle for fission source generation in order to collect the full fission source distribution for the next cycle and to estimate the effective multiplication factor, which is not only part of the requested results, but also input to the next cycle for population control. Basic improvements to overcome this limitation are suggested and tested. Also other time losses in the parallel calculation are identified. Moreover, the threading mechanism, which allows the parallel execution of tasks based on shared memory using OpenMP, is analyzed in detail. Recommendations are given to get the maximum efficiency out of a parallel Monte Carlo calculation. (authors)

  17. Exact Monte Carlo for molecules

    International Nuclear Information System (INIS)

    Lester, W.A. Jr.; Reynolds, P.J.

    1985-03-01

    A brief summary of the fixed-node quantum Monte Carlo method is presented. Results obtained for binding energies, the classical barrier height for H + H 2 , and the singlet-triplet splitting in methylene are presented and discussed. 17 refs

  18. Monte Carlo - Advances and Challenges

    International Nuclear Information System (INIS)

    Brown, Forrest B.; Mosteller, Russell D.; Martin, William R.

    2008-01-01

    Abstract only, full text follows: With ever-faster computers and mature Monte Carlo production codes, there has been tremendous growth in the application of Monte Carlo methods to the analysis of reactor physics and reactor systems. In the past, Monte Carlo methods were used primarily for calculating k eff of a critical system. More recently, Monte Carlo methods have been increasingly used for determining reactor power distributions and many design parameters, such as β eff , l eff , τ, reactivity coefficients, Doppler defect, dominance ratio, etc. These advanced applications of Monte Carlo methods are now becoming common, not just feasible, but bring new challenges to both developers and users: Convergence of 3D power distributions must be assured; confidence interval bias must be eliminated; iterated fission probabilities are required, rather than single-generation probabilities; temperature effects including Doppler and feedback must be represented; isotopic depletion and fission product buildup must be modeled. This workshop focuses on recent advances in Monte Carlo methods and their application to reactor physics problems, and on the resulting challenges faced by code developers and users. The workshop is partly tutorial, partly a review of the current state-of-the-art, and partly a discussion of future work that is needed. It should benefit both novice and expert Monte Carlo developers and users. In each of the topic areas, we provide an overview of needs, perspective on past and current methods, a review of recent work, and discussion of further research and capabilities that are required. Electronic copies of all workshop presentations and material will be available. The workshop is structured as 2 morning and 2 afternoon segments: - Criticality Calculations I - convergence diagnostics, acceleration methods, confidence intervals, and the iterated fission probability, - Criticality Calculations II - reactor kinetics parameters, dominance ratio, temperature

  19. (U) Introduction to Monte Carlo Methods

    Energy Technology Data Exchange (ETDEWEB)

    Hungerford, Aimee L. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2017-03-20

    Monte Carlo methods are very valuable for representing solutions to particle transport problems. Here we describe a “cook book” approach to handling the terms in a transport equation using Monte Carlo methods. Focus is on the mechanics of a numerical Monte Carlo code, rather than the mathematical foundations of the method.

  20. Mr. Starbene e il Club dei Vincenti: assessing an anti-smoking campaign for school children

    Directory of Open Access Journals (Sweden)

    Federico Roncarolo

    2008-03-01

    Full Text Available

    Background: People start smoking during childhood and adolescence and the age at which children start smoking is gradually falling: in 2005, it rose to 3.3% in the 11-to-14 year age group whereas in 2002 it was only 1.4% in the same age group.

    Methods: “Mr Starbene e il Club dei Vincenti”, part of a regional program, Liberi dal Fumo, was assessed through an experimental non-randomized study, by involving parents and teachers, using short questionnaires. The project’s objective was orienting fourth and fifth grade children towards a no-smoking lifestyle. The enrolled population was composed of 5,552 students in the treatment group and 4,758 controls.

    Results:: after two years, the number of children who had tried smoking but no longer smoked at the moment decreased by 16.3% in the treatment group, while it increased by 12.5% in the controls (p=0.000. The number of children who considered smoking a few cigarettes/day dangerous was higher in the treatment group (+8% than in the controls (+4.4% which suggests significant results vis-à-vis perceived smoking hazards. Children who claimed they would not smoke in the future decreased by 57.1% in the treated group as compared with a 21.4% reduction in the control group (p<0.001; children who said they would accept an offer of a cigarette decreased in the treated group (-12.5%, but not in the controls (p<0.001. The study pointed out also the influence of role-models in children attitudes toward smoking.

    Conclusions: The positive results of this project give rise to hope for the future, even if long term evaluation is necessary. The good scores obtained from the teachers are very positive because they make the project work.

  1. Monte Carlo analysis of radiative transport in oceanographic lidar measurements

    Energy Technology Data Exchange (ETDEWEB)

    Cupini, E.; Ferro, G. [ENEA, Divisione Fisica Applicata, Centro Ricerche Ezio Clementel, Bologna (Italy); Ferrari, N. [Bologna Univ., Bologna (Italy). Dipt. Ingegneria Energetica, Nucleare e del Controllo Ambientale

    2001-07-01

    The analysis of oceanographic lidar systems measurements is often carried out with semi-empirical methods, since there is only a rough understanding of the effects of many environmental variables. The development of techniques for interpreting the accuracy of lidar measurements is needed to evaluate the effects of various environmental situations, as well as of different experimental geometric configurations and boundary conditions. A Monte Carlo simulation model represents a tool that is particularly well suited for answering these important questions. The PREMAR-2F Monte Carlo code has been developed taking into account the main molecular and non-molecular components of the marine environment. The laser radiation interaction processes of diffusion, re-emission, refraction and absorption are treated. In particular are considered: the Rayleigh elastic scattering, produced by atoms and molecules with small dimensions with respect to the laser emission wavelength (i.e. water molecules), the Mie elastic scattering, arising from atoms or molecules with dimensions comparable to the laser wavelength (hydrosols), the Raman inelastic scattering, typical of water, the absorption of water, inorganic (sediments) and organic (phytoplankton and CDOM) hydrosols, the fluorescence re-emission of chlorophyll and yellow substances. PREMAR-2F is an extension of a code for the simulation of the radiative transport in atmospheric environments (PREMAR-2). The approach followed in PREMAR-2 was to combine conventional Monte Carlo techniques with analytical estimates of the probability of the receiver to have a contribution from photons coming back after an interaction in the field of view of the lidar fluorosensor collecting apparatus. This offers an effective mean for modelling a lidar system with realistic geometric constraints. The retrieved semianalytic Monte Carlo radiative transfer model has been developed in the frame of the Italian Research Program for Antarctica (PNRA) and it is

  2. Il problema dei debiti internazionali nel periodo tra le due guerre mondiali. (The international debt problem in the interwar period

    Directory of Open Access Journals (Sweden)

    M. DE CECCO

    2013-12-01

    Full Text Available Grande attenzione è stata recentemente dedicata al problema attuale del debito del terzo mondo e le sue implicazioni per il sistema bancario internazionale . Una rassegna di eventi simili a volte precedenti in passato dimostra che gli operatori dei mercati finanziari internazionali hanno la memoria corta , poiché la maggior parte degli aspetti della crisi si sono verificati in passato. Questo è confermato dal considerare il problema del debito internazionale tra la prima e la seconda guerra mondiale . La principale differenza tra allora e adesso è che il periodo tra le due guerre fu un periodo di transizione da un sistema di commercio dominato daòòa sterlina ad uno dominato  dal dollaro statunitense . Molti dei problemi di oggi derivano da questa continua dominazione dollaroConsiderable attention has recently been paid to the current problem of third world debt and its implications for the international banking system. A review of similar events at previous times in the past shows that operators in international financial markets have very short memories, since most of the aspects of the current crisis have occurred in the past. This is borne out by considering the international debt problem between the first and second world wars. The major difference between then and now is that the interwar period was a time of transition from a sterling-dominated trading system to one dominated by the US dollar. Many of today's problems stem from this continuing dollar domination.JEL: N24

  3. 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.

  4. LE PAROLE DEI LIBRI NEL "VOCABOLARIO MILANESE-ITALIANO" DI FRANCESCO CHERUBINI. RIFLESSI DEL MONDO EDITORIALE (MILANESE NEL LESSICO DIALETTALE

    Directory of Open Access Journals (Sweden)

    Edoardo Buroni

    2016-09-01

    Full Text Available Oltre che come lessicografo e dialettologo, Francesco Cherubini spese gran parte della sua vita professionale occupandosi di libri: il vasto mondo editoriale di stamperie, tipografie e cartiere costituisce uno dei settori specialistici più rappresentati nel Vocabolario milanese-italiano, opera contraddistinta da una particolare attenzione alle voci di arti e mestieri. Questo saggio fornisce un regesto ragionato e commentato di tali lemmi, sottolineando la grande competenza del compilatore e la forte componente autobiografica che emergono dalle “parole dei libri”. Words about books in Francesco Cherubini’s “Vocabolario milanese-italiano”. Reflections of the (milanese world of publishing in dialect As well as being a lexicographer and dialectologist, Francesco Cherubini spent much of his professional life dealing with books: the vast world of publishing, printing and the paper industry was one of the most specialized sectors represented in the Vocabolario milanese-italiano, a work characterized by a particular focus on arts and crafts terminology. This paper provides an annotated summary and comments on such items, emphasizing the great responsibility of the compiler and the strong autobiographical component emerging from the “words of books”.

  5. Near-surface geophysical investigations inside the cloister of the historical palace 'Palazzo dei Celestini' in Lecce, Italy

    International Nuclear Information System (INIS)

    Nuzzo, Luigia; Quarta, Tatiana

    2010-01-01

    Non-invasive geophysical investigations are usually the only way to gain information on subsurface properties that can affect the stability of historical structures and accelerate degradation processes. A combined multi-frequency ground-penetrating radar (GPR) geoelectrical and induced polarization (IP) survey was performed in the cloister of 'Palazzo dei Celestini', Lecce, southern Italy, in order to investigate possible subsurface causes of deterioration. The historical palace was originally a convent connected to the Basilica of 'Santa Croce' and is now the head office of the Province of Lecce Administration and the Prefecture. Built in Pietra Leccese, a fine-grained calcarenite, Santa Croce and Palazzo dei Celestini is the most famous baroque architectural complex of the historical centre of Lecce. The high capillarity of the building material causes deterioration problems especially at some altars of the church and in the lower portion of the walls and pillars of the monumental building. The integrated geophysical survey yielded a detailed description of the shallow stratigraphical and hydro-geological setting of the area and an accurate location of ancient and modern drainage systems. The geophysical information was essential for identifying natural or anthropogenic causes of the local increase in subsoil moisture that could accelerate the degradation process and for developing effective remediation activities

  6. Gestione e manutenzione dell’illuminazione pubblica e dei centri luminosi: l’esperienza del Comune di Verona

    Directory of Open Access Journals (Sweden)

    Redazione Redazione

    2006-04-01

    Full Text Available Nella Gestione dei servizi da parte della Pubblica Amministrazione riveste una particolare importanza quellodell'illuminazione pubblica generalmente collegato alle forniture dell'energia elettrica. Tali servizi sono spesso gestiti da società municipalizate che nelle grandi città sono state privatizzate o si appoggiano a società private in grado di gestire convenientemente e con i mezzi opportuni gli obblighi nei confronti degli utenti. Di fondamentale importanza sono gli strumenti GIS in grado di poter gestire geograficamente gli interventi manutentivi e il monitoraggio costante della situazione al fine di evitare i disservizi più disparati dovuti sia al degrado che al consumo o ai fenomeni meteorologici.Di rilevamte importanza la gestione della manutenzione programmata per il suo benficio sia in termini qualitativiche economici. E' noto, ad esempio, che un intervento di riverniciatura a cadenza prestabilita ha dei costi inferiori allasostituzione integrale per degrado. In questi termini viene affrontato dall'Amministrazione di Verona la gestione della pubblica illuminazione.

  7. Isotopic depletion with Monte Carlo

    International Nuclear Information System (INIS)

    Martin, W.R.; Rathkopf, J.A.

    1996-06-01

    This work considers a method to deplete isotopes during a time- dependent Monte Carlo simulation of an evolving system. The method is based on explicitly combining a conventional estimator for the scalar flux with the analytical solutions to the isotopic depletion equations. There are no auxiliary calculations; the method is an integral part of the Monte Carlo calculation. The method eliminates negative densities and reduces the variance in the estimates for the isotope densities, compared to existing methods. Moreover, existing methods are shown to be special cases of the general method described in this work, as they can be derived by combining a high variance estimator for the scalar flux with a low-order approximation to the analytical solution to the depletion equation

  8. Monte Carlo Methods in ICF

    Science.gov (United States)

    Zimmerman, George B.

    Monte Carlo methods appropriate to simulate the transport of x-rays, neutrons, ions and electrons in Inertial Confinement Fusion targets are described and analyzed. The Implicit Monte Carlo method of x-ray transport handles symmetry within indirect drive ICF hohlraums well, but can be improved 50X in efficiency by angular biasing the x-rays towards the fuel capsule. Accurate simulation of thermonuclear burn and burn diagnostics involves detailed particle source spectra, charged particle ranges, inflight reaction kinematics, corrections for bulk and thermal Doppler effects and variance reduction to obtain adequate statistics for rare events. It is found that the effects of angular Coulomb scattering must be included in models of charged particle transport through heterogeneous materials.

  9. Monte Carlo methods in ICF

    International Nuclear Information System (INIS)

    Zimmerman, G.B.

    1997-01-01

    Monte Carlo methods appropriate to simulate the transport of x-rays, neutrons, ions and electrons in Inertial Confinement Fusion targets are described and analyzed. The Implicit Monte Carlo method of x-ray transport handles symmetry within indirect drive ICF hohlraums well, but can be improved 50X in efficiency by angular biasing the x-rays towards the fuel capsule. Accurate simulation of thermonuclear burn and burn diagnostics involves detailed particle source spectra, charged particle ranges, inflight reaction kinematics, corrections for bulk and thermal Doppler effects and variance reduction to obtain adequate statistics for rare events. It is found that the effects of angular Coulomb scattering must be included in models of charged particle transport through heterogeneous materials. copyright 1997 American Institute of Physics

  10. Monte Carlo methods in ICF

    International Nuclear Information System (INIS)

    Zimmerman, George B.

    1997-01-01

    Monte Carlo methods appropriate to simulate the transport of x-rays, neutrons, ions and electrons in Inertial Confinement Fusion targets are described and analyzed. The Implicit Monte Carlo method of x-ray transport handles symmetry within indirect drive ICF hohlraums well, but can be improved 50X in efficiency by angular biasing the x-rays towards the fuel capsule. Accurate simulation of thermonuclear burn and burn diagnostics involves detailed particle source spectra, charged particle ranges, inflight reaction kinematics, corrections for bulk and thermal Doppler effects and variance reduction to obtain adequate statistics for rare events. It is found that the effects of angular Coulomb scattering must be included in models of charged particle transport through heterogeneous materials

  11. Shell model Monte Carlo methods

    International Nuclear Information System (INIS)

    Koonin, S.E.; Dean, D.J.; Langanke, K.

    1997-01-01

    We review quantum Monte Carlo methods for dealing with large shell model problems. These methods reduce the imaginary-time many-body evolution operator to a coherent superposition of one-body evolutions in fluctuating one-body fields; the resultant path integral is evaluated stochastically. We first discuss the motivation, formalism, and implementation of such Shell Model Monte Carlo (SMMC) methods. There then follows a sampler of results and insights obtained from a number of applications. These include the ground state and thermal properties of pf-shell nuclei, the thermal and rotational behavior of rare-earth and γ-soft nuclei, and the calculation of double beta-decay matrix elements. Finally, prospects for further progress in such calculations are discussed. (orig.)

  12. A contribution Monte Carlo method

    International Nuclear Information System (INIS)

    Aboughantous, C.H.

    1994-01-01

    A Contribution Monte Carlo method is developed and successfully applied to a sample deep-penetration shielding problem. The random walk is simulated in most of its parts as in conventional Monte Carlo methods. The probability density functions (pdf's) are expressed in terms of spherical harmonics and are continuous functions in direction cosine and azimuthal angle variables as well as in position coordinates; the energy is discretized in the multigroup approximation. The transport pdf is an unusual exponential kernel strongly dependent on the incident and emergent directions and energies and on the position of the collision site. The method produces the same results obtained with the deterministic method with a very small standard deviation, with as little as 1,000 Contribution particles in both analog and nonabsorption biasing modes and with only a few minutes CPU time

  13. Shell model Monte Carlo methods

    International Nuclear Information System (INIS)

    Koonin, S.E.

    1996-01-01

    We review quantum Monte Carlo methods for dealing with large shell model problems. These methods reduce the imaginary-time many-body evolution operator to a coherent superposition of one-body evolutions in fluctuating one-body fields; resultant path integral is evaluated stochastically. We first discuss the motivation, formalism, and implementation of such Shell Model Monte Carlo methods. There then follows a sampler of results and insights obtained from a number of applications. These include the ground state and thermal properties of pf-shell nuclei, thermal behavior of γ-soft nuclei, and calculation of double beta-decay matrix elements. Finally, prospects for further progress in such calculations are discussed. 87 refs

  14. Parallel Monte Carlo reactor neutronics

    International Nuclear Information System (INIS)

    Blomquist, R.N.; Brown, F.B.

    1994-01-01

    The issues affecting implementation of parallel algorithms for large-scale engineering Monte Carlo neutron transport simulations are discussed. For nuclear reactor calculations, these include load balancing, recoding effort, reproducibility, domain decomposition techniques, I/O minimization, and strategies for different parallel architectures. Two codes were parallelized and tested for performance. The architectures employed include SIMD, MIMD-distributed memory, and workstation network with uneven interactive load. Speedups linear with the number of nodes were achieved

  15. Elements of Monte Carlo techniques

    International Nuclear Information System (INIS)

    Nagarajan, P.S.

    2000-01-01

    The Monte Carlo method is essentially mimicking the real world physical processes at the microscopic level. With the incredible increase in computing speeds and ever decreasing computing costs, there is widespread use of the method for practical problems. The method is used in calculating algorithm-generated sequences known as pseudo random sequence (prs)., probability density function (pdf), test for randomness, extension to multidimensional integration etc

  16. Adaptive Multilevel Monte Carlo Simulation

    KAUST Repository

    Hoel, H

    2011-08-23

    This work generalizes a multilevel forward Euler Monte Carlo method introduced in Michael B. Giles. (Michael Giles. Oper. Res. 56(3):607–617, 2008.) for the approximation of expected values depending on the solution to an Itô stochastic differential equation. The work (Michael Giles. Oper. Res. 56(3):607– 617, 2008.) proposed and analyzed a forward Euler multilevelMonte Carlo method based on a hierarchy of uniform time discretizations and control variates to reduce the computational effort required by a standard, single level, Forward Euler Monte Carlo method. This work introduces an adaptive hierarchy of non uniform time discretizations, generated by an adaptive algorithmintroduced in (AnnaDzougoutov et al. Raùl Tempone. Adaptive Monte Carlo algorithms for stopped diffusion. In Multiscale methods in science and engineering, volume 44 of Lect. Notes Comput. Sci. Eng., pages 59–88. Springer, Berlin, 2005; Kyoung-Sook Moon et al. Stoch. Anal. Appl. 23(3):511–558, 2005; Kyoung-Sook Moon et al. An adaptive algorithm for ordinary, stochastic and partial differential equations. In Recent advances in adaptive computation, volume 383 of Contemp. Math., pages 325–343. Amer. Math. Soc., Providence, RI, 2005.). This form of the adaptive algorithm generates stochastic, path dependent, time steps and is based on a posteriori error expansions first developed in (Anders Szepessy et al. Comm. Pure Appl. Math. 54(10):1169– 1214, 2001). Our numerical results for a stopped diffusion problem, exhibit savings in the computational cost to achieve an accuracy of ϑ(TOL),from(TOL−3), from using a single level version of the adaptive algorithm to ϑ(((TOL−1)log(TOL))2).

  17. Geometrical splitting in Monte Carlo

    International Nuclear Information System (INIS)

    Dubi, A.; Elperin, T.; Dudziak, D.J.

    1982-01-01

    A statistical model is presented by which a direct statistical approach yielded an analytic expression for the second moment, the variance ratio, and the benefit function in a model of an n surface-splitting Monte Carlo game. In addition to the insight into the dependence of the second moment on the splitting parameters the main importance of the expressions developed lies in their potential to become a basis for in-code optimization of splitting through a general algorithm. Refs

  18. Extending canonical Monte Carlo methods

    International Nuclear Information System (INIS)

    Velazquez, L; Curilef, S

    2010-01-01

    In this paper, we discuss the implications of a recently obtained equilibrium fluctuation-dissipation relation for the extension of the available Monte Carlo methods on the basis of the consideration of the Gibbs canonical ensemble to account for the existence of an anomalous regime with negative heat capacities C α with α≈0.2 for the particular case of the 2D ten-state Potts model

  19. Non statistical Monte-Carlo

    International Nuclear Information System (INIS)

    Mercier, B.

    1985-04-01

    We have shown that the transport equation can be solved with particles, like the Monte-Carlo method, but without random numbers. In the Monte-Carlo method, particles are created from the source, and are followed from collision to collision until either they are absorbed or they leave the spatial domain. In our method, particles are created from the original source, with a variable weight taking into account both collision and absorption. These particles are followed until they leave the spatial domain, and we use them to determine a first collision source. Another set of particles is then created from this first collision source, and tracked to determine a second collision source, and so on. This process introduces an approximation which does not exist in the Monte-Carlo method. However, we have analyzed the effect of this approximation, and shown that it can be limited. Our method is deterministic, gives reproducible results. Furthermore, when extra accuracy is needed in some region, it is easier to get more particles to go there. It has the same kind of applications: rather problems where streaming is dominant than collision dominated problems

  20. BREM5 electroweak Monte Carlo

    International Nuclear Information System (INIS)

    Kennedy, D.C. II.

    1987-01-01

    This is an update on the progress of the BREMMUS Monte Carlo simulator, particularly in its current incarnation, BREM5. The present report is intended only as a follow-up to the Mark II/Granlibakken proceedings, and those proceedings should be consulted for a complete description of the capabilities and goals of the BREMMUS program. The new BREM5 program improves on the previous version of BREMMUS, BREM2, in a number of important ways. In BREM2, the internal loop (oblique) corrections were not treated in consistent fashion, a deficiency that led to renormalization scheme-dependence; i.e., physical results, such as cross sections, were dependent on the method used to eliminate infinities from the theory. Of course, this problem cannot be tolerated in a Monte Carlo designed for experimental use. BREM5 incorporates a new way of treating the oblique corrections, as explained in the Granlibakken proceedings, that guarantees renormalization scheme-independence and dramatically simplifies the organization and calculation of radiative corrections. This technique is to be presented in full detail in a forthcoming paper. BREM5 is, at this point, the only Monte Carlo to contain the entire set of one-loop corrections to electroweak four-fermion processes and renormalization scheme-independence. 3 figures

  1. Statistical implications in Monte Carlo depletions - 051

    International Nuclear Information System (INIS)

    Zhiwen, Xu; Rhodes, J.; Smith, K.

    2010-01-01

    As a result of steady advances of computer power, continuous-energy Monte Carlo depletion analysis is attracting considerable attention for reactor burnup calculations. The typical Monte Carlo analysis is set up as a combination of a Monte Carlo neutron transport solver and a fuel burnup solver. Note that the burnup solver is a deterministic module. The statistical errors in Monte Carlo solutions are introduced into nuclide number densities and propagated along fuel burnup. This paper is towards the understanding of the statistical implications in Monte Carlo depletions, including both statistical bias and statistical variations in depleted fuel number densities. The deterministic Studsvik lattice physics code, CASMO-5, is modified to model the Monte Carlo depletion. The statistical bias in depleted number densities is found to be negligible compared to its statistical variations, which, in turn, demonstrates the correctness of the Monte Carlo depletion method. Meanwhile, the statistical variation in number densities generally increases with burnup. Several possible ways of reducing the statistical errors are discussed: 1) to increase the number of individual Monte Carlo histories; 2) to increase the number of time steps; 3) to run additional independent Monte Carlo depletion cases. Finally, a new Monte Carlo depletion methodology, called the batch depletion method, is proposed, which consists of performing a set of independent Monte Carlo depletions and is thus capable of estimating the overall statistical errors including both the local statistical error and the propagated statistical error. (authors)

  2. Aperture eutanasiche e aporie nel documento del Cortile dei Gentili “Linee propositive per un diritto della relazione di cura e delle decisioni di fine vita”

    Directory of Open Access Journals (Sweden)

    Tommaso Scandroglio

    2017-07-01

    Full Text Available SOMMARIO: 1. L’oggetto del presente contributo - 2. Bene vita e ordinamento giuridico - 3. Il Cortile dei Gentili apre all’eutanasia - 4. Pianificazione condivisa di cure e Dichiarazioni anticipate - 5. Profili di criticità delle D.a.t.

  3. Critical load of acid precipitations. Mapping of Italian regions; Mappa dei carichi critici di acidita' totale riferita al territorio italiano

    Energy Technology Data Exchange (ETDEWEB)

    Bonanni, P.; Brini, S.; Delmonaco, G.; Liburdi, R.; Trocciola, A.; Vetrella, G. [ENEA Centro Ricerche Casaccia, S. Maria di Galeria, RM (Italy). Dipt. Ambiente

    1999-07-01

    In this report the mapping of critical loads of acidity for the Italian terrestrial ecosystems is presented. The level O method (Stockholm Environment Institute) has been used to determine sensitivity to acid deposition; this semi-quantitative method has been modified to address some Italian characteristics. The results show that the sensitivity of the Italian soils to acidification is not particularly elevated: there are really only few small areas with poor tolerance to acid depositions. These areas are in the north-east of Italy, in Alpine and Prealpine region. [Italian] Nel rapporto vengono riportati i risultati della mappatura, riferita agli ecosistemi terrestri del territorio italiano, dei carichi critici per l'acidita' totale. Il calcolo dei carichi critici e' stato eseguito sulla base della metodologia messa a punto dallo Stokholm Environment Institute; a questo metodo semi-quantitativo sono state apportate alcune modifiche per meglio adattarlo alle caratteristiche del territorio italiano. Dall'analisi dei risultati ottenuti, si evince come la sensibilita' dei suoli italiani all'acidificazione non sia particolarmente elevata: sono state riscontrate infatti solo alcune aree, peraltro con superficie limitata, con una scarsa tolleranza alle deposizioni acide. Tali aree sono localizzate nell'Italia nord-orientale, in zona alpina e prealpina.

  4. La religione nell’ordinamento algerino tra previsioni costituzionali e normativa ordinaria in materia di esercizio dei culti diversi dal musulmano

    Directory of Open Access Journals (Sweden)

    Maria Cristina Ivaldi

    2012-11-01

    SOMMARIO: 1. Rilievi introduttivi – 2. Il trattamento riservato alla religione nelle costituzioni algerine postcoloniali – 3. La disciplina in materia di esercizio dei culti diversi dal musulmano varata nel 2006 – 4. I decreti di esecuzione della normativa de qua – 5. Tendenze evolutive:

  5. La partecipazione dei fedeli laici alla vita pubblica. Testimonianza cristiana, etica pubblica e bene comune nell’insegnamento di Benedetto XVI

    Directory of Open Access Journals (Sweden)

    Fabio Franceschi

    2011-11-01

    Full Text Available Versione riveduta e ampliata, nel testo e nell’apparato bibliografico, della relazione presentata con il titolo “L’impegno dei fedeli laici nella vita pubblica tra responsabilità propria, libertà e dovere di obbedienza al magistero. L’insegnamento di Benedetto XVI” al Convegno di studi “Il fedele laico: realtà e prospettive”, organizzato dalla Pontificia Università della Santa Croce (7-8 aprile 2011. Il contributo è destinato alla pubblicazione negli Atti del Convegno. SOMMARIO: 1. Considerazioni introduttive. Natura essenzialmente laicale della responsabilità politica - 2. L’intervento della Chiesa nel dibattito pubblico su questioni inerenti alla vita sociale e politica. I principi c.d. non negoziabili - 3. Fondamentale libertà dei fedeli rispetto alle indicazioni della gerarchia in materia temporale – 4. La funzione di orientamento dei pastori della comunità ecclesiale e i confini dell’intervento della stessa – 5. I limiti alla libertà dei fedeli in materia temporale: il rapporto tra libertà e verità e la salvaguardia delle esigenze etiche fondamentali e irrinunciabili per il bene comune e della società – 6. Benedetto XVI e l’invito a una nuova generazione di cattolici impegnati in politica. La difesa della centralità della persona umana come compito primario dei credenti impegnati nel governo della città terrena– 7. (segue L’impegno a favore della promozione di un concetto positivo di laicità, aperto alla Trascendenza − 8. (segue La politica come forma singolare di realizzazione della carità – 9. (segue La dottrina sociale della Chiesa come strumento di formazione essenziale e guida sicura per i fedeli laici impegnati nell’ambito socio-politico – 10. Considerazioni conclusive. Doveri, rispettivi, dello Stato e della Chiesa affinché si conservino, o se necessario si creino le condizioni esterne idonee e necessarie allo svolgimento dei compiti dei christifideles laici nella polis.

  6. Abdominal ultrasonography in inheredited diseases of carbohydrate metabolism; Ecografia dell'addome nelle malattie ereditarie del metabolismo dei carboidrati

    Energy Technology Data Exchange (ETDEWEB)

    Pozzato, Carlo; Curti, Alessandra; Cornalba, Gianpaolo [Milano Univ., Ospedale San Paolo, Milano (Italy). Unita' Operativa di Radiologia Diagnostica ed Interventistica, Istituto di Scienze Radiologiche; Radaelli, Giovanni [Milano Univ., Ospedale San Paolo, Milano (Italy). Unita' Operativa di Statistica Medica; Fiori, Laura; Rossi, Samantha; Riva, Enrica [Milano Univ., Ospedale San Paolo, Mialno (Italy). Dipartimento di Pediatria

    2005-02-01

    Purpose: To determine the usefulness of abdominal sonography in inherited diseases of carbohydrate metabolism. Materials and methods: Thirty patients (age range, 4 months to 27 years) with glycogen storage diseases, galactosemia, disorders of fructose metabolism were studied with sonography. Echogenicity of the liver, sonographic dimensions of liver, kidneys and spleen were evaluated. Plasma blood parameters (ALT, AST, total cholesterol, triglycerides) were determined. Results: Liver was enlarged in 21/22 patients (95.4%) with glycogen storage diseases, in both subjects with disorders of fructose metabolism, and in 2/6 patients (33.3%) with galactosemia. Hepatic echogenicity was increased in 20/22 patients (90.9%) with glycogen storage diseases, and in the subject with hereditary fructose intolerance. Patients with galactosemia did not show increased liver echogenicity. Both kidney were enlarged in 8/17 patients (47.0%) with glycogen storage disease type I. Subjects with increased hepatic echogenicity exhibited higher plasma concentrations of any blood parameter than the others with normal echogenicity (p<0.05). Conclusions: Sonography can be useful in identification of inherited diseases of carbohydrate metabolism even if further examinations are necessary for an ultimate diagnosis. [Italian] Scopo: Determinare l'utilita' dell'ecografia addominale nelle malattie ereditarie del metabolismo dei carboidrati. Materiale e metodi: Di 30 pazienti (eta' compresa tra 4 mesi e 27 anni), affetti da malattie di accumulo di glicogeno (glicogenosi), galattosemia, disordini del metabolismo del fruttosio, sono stati valutati tramite ecografia l'ecogenicita' epatica e le dimensioni ecografiche di fegato, reni e milza. Sono stati determinati alcuni parametri ematici (ALT, AST, colesterolo totale, trigliceridi). Risultati: Il fegato e' risultato ingrandito in 21/22 pazienti (95,4%) con malattie da accumolo di glicogeno, in entrambi i soggetti con

  7. Teoria e crisi della libera fluttuazione dei cambi. (The theory and crisis of free floating exchange rates

    Directory of Open Access Journals (Sweden)

    R. TAMBORINI

    2013-12-01

    Full Text Available  Dopo la fine del sistema di fede, di Bretton Woods in un regime di cambio liberamente fluttuante, e in particolare la completa politica di laissez-faire degli Stati Uniti dopo il 1980, è stata sostenuta da una letteratura vasta e influente - la cosiddetta "teoria il punto della cambio "- che ha avuto predominio quasi assoluto nel campo. Il presente lavoro è di natura teorica in primo luogo, richiamando l'attenzione sul recente cambiamento drastico di opinione per quanto riguarda l'efficienza dei mercati dei cambi, delle aspettative e speculazioni. In contrasto con la credenza precedentemente detenuta, gli agenti che anticipano il mercato sono ora accusati di inefficiente, se non il comportamento irrazionale; si dice che essere mal interpretare o violare i "dati concreti", che dovrebbero portare il mercato sul sentiero di equilibrio. Secondo l'autore, questa nuova vena è impegnativo, ma il nuovo "cattivo" deus ex machina è convincente come i suoi predecessori "buoni". Così, l'attenzione è proprio sui fattori fondamentali della dinamica dei tassi di cambio nel contesto attuale di finanza integrata Lowing the end of the Bretton Woods system faith in a freely floating exchange rate regime, and in particular the complete Laissez-faire policy of the US after 1980, was supported by a large and influential literature - the so-called "stock theory of the exchange rate" - which has had almost absolute dominance in the field. The present work is of primarily a theoretical nature, calling attention to the recent drastic change of opinion regarding the efficiency of foreign exchange markets, of expectations and speculation. In contrast to the previously held belief, agents that anticipate the market are now accused of inefficient, if not irrational behaviour; they are said to be misinterpreting or violating the "hard data" that should lead the market on the path of equilibrium. According to the author, this new vein is challenging, yet the new "bad

  8. Non solo quotidiani in classe: considerazioni sull’italiano dei mass media.

    Directory of Open Access Journals (Sweden)

    Silvia Morgana

    2009-12-01

    Full Text Available Normal 0 14 MicrosoftInternetExplorer4 /* 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";} L’articolo suggerisce che la scuola, sede dell’educazione linguistica,  deve insegnare a riflettere sulla ‘norma implicita’ dei media, a cui i ragazzi sono esposti quotidianamente  nel mondo extrascolastico. La formazione di capacità critiche rispetto alla lingua veicolata dai media può avere come punto di partenza l’esperienza del quotidiano in classe alle superiori, che oggi coinvolge più di  44.000 docenti e quasi un milione e ottocentomila studenti. L’osservazione di fenomeni innovativi rispetto all’italiano standard descritto dalle grammatiche, la riflessione sulle varietà e sul dilagare della dimensione orale nello scritto, il riconoscimento di tendenze ‘trasversali’ che coinvolgono diversi ambiti testuali, possono fornire validi strumenti  alla pratica didattica.  Ma tutto il sistema massmediatico  oggi punta alla complementarietà, ai rimandi  tra i vari media, con passaggi continui: i giornali dalla Tv e dal web,  il cinema dal fumetto, il fumetto dal cinema, la pubblicità dal fumetto. Appare allora importante l’esigenza di introdurre nella pratica scolastica anche la capacità di riflettere sulla lingua di altri media che entrano nella esperienza quotidiana giovanile, come il fumetto.  Normal 0 14 MicrosoftInternetExplorer4 /* 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

  9. Monte Carlo Particle Lists: MCPL

    DEFF Research Database (Denmark)

    Kittelmann, Thomas; Klinkby, Esben Bryndt; Bergbäck Knudsen, Erik

    2017-01-01

    A binary format with lists of particle state information, for interchanging particles between various Monte Carlo simulation applications, is presented. Portable C code for file manipulation is made available to the scientific community, along with converters and plugins for several popular...... simulation packages. Program summary: Program Title: MCPL. Program Files doi: http://dx.doi.org/10.17632/cby92vsv5g.1 Licensing provisions: CC0 for core MCPL, see LICENSE file for details. Programming language: C and C++ External routines/libraries: Geant4, MCNP, McStas, McXtrace Nature of problem: Saving...

  10. Synchrotron supported Dei/KES of a brain tumor in an animal model: The search for a microimaging modality

    International Nuclear Information System (INIS)

    Mannan, K.A.; Schueltke, E.; Menk, R.H.; Siu, K.; Pavlov, K.; Kelly, M.; McLoughlin, G.; Beveridge, T.; Tromba, G.; Juurlink, B.H.; Chapman, D.; Rigon, L.; Griebel, R.W.

    2005-01-01

    Glioblastoma multiforme (GBM) is the commonest and most aggressive primary brain tumor in humans. The high rate of tumor recurrence results in a poor prognosis despite multimodality treatment. One reason for high rate of recurrence is the invasive nature of the tumor into the surrounding normal brain tissue or multifocal occurrence at sites remote from that of the primary tumor establishment. Existing imaging demonstrates the primary tumor but fail to show the residual tumor microaggregates left behind following initial treatment. In this study, we employed diffraction-enhanced imaging (DEI) in an attempt to find an imaging modality that will provide visualization of residual disease that is not be apparent on MRI or CT scans

  11. Peracetic acid as disinfectant of municipal wastewaters; L'acido peracetico nella disinfezione dei reflui urbani

    Energy Technology Data Exchange (ETDEWEB)

    Funari, E. [Istituto Superiore di Sanita' , Laboratorio di Igiene Ambientale, Reparto di Medicina Ambientale, Rome (Italy); Lopez, A. [Consiglio Nazionale delle Ricerche, Istituto di Ricerca sulle Acque, Reparto di Chimica e Tecnologia delle Acque, Bari (Italy)

    2000-09-01

    altri settori tra cui quello alimentare, e' dovuto, diversamente da quanto si verifica con l'uso di altri disinfettanti, alla dichiarata assenza di sottoprodotti pericolosi ed al conseguente mancato aumento di tossicita' dei reflui trattati. Tuttavia, nonostante tali premesse, nel settore dei reflui urbani l'impiego dell'acido peracetico stenta ad affermarsi sia per fattori economici che per la prevedibile diffidenza verso un prodotto relativamente nuovo che cosi' <> la limitata conoscenza, specie se comparata con quella relativa al cloro, della sua reale efficacia germicida nei confronti dei diversi tipi di microrganismi patogeni (batteri, virus, parassiti), delle sue proprieta' eco-tossicologiche, delle sue prestazioni come disinfettante in impianti in piena scala. Il presente lavoro oltre a fornire un'ampia raccolta di riferimenti bibliografici, esamina i dati disponibili sul PAA con particolare riferimento: all'efficacia disinfettante nei confronti dei diversi microrganismi patogeni; alla formazione e tossicita' di sottoprodotti di disinfezione; all'impatto ambientale associato allo scarico di reflui trattati con PAA nei corpi idrici; alle condizioni operative adottate in impianti di dimensioni signficative.

  12. Superfluità e ‘vuoto mentale’ dei lavoratori: una esplorazione attraverso i racconti di Franz Kafka

    Directory of Open Access Journals (Sweden)

    Luigi Ferrari

    2015-09-01

    Full Text Available Kafka non è stato un impiegato passivo e distratto. Recenti studi sui suoi documenti di lavoro hanno evidenziato una passione e una competenza professionale notevoli. Questa competenza è stata riversata nelle sue opere letterarie che parlano di lavoro e di organizzazioni con una conoscenza diretta. Lo stile simbolista di Kafka è stato molto efficace nel cambiare il modo di vedere le organizzazioni. Lo scrittore, in particolare, ha intuito la crescita degli ultimi anni della popolazione eccedente. Kafka ha saputo afferrare la psicologia e gli atteggiamenti profondi dei lavoratori che fronteggiano la loro superfluità e l’espulsione dal mondo del lavoro. Più in dettaglio, Kafka è stato capace di analizzare la resa psicologica alla superfluità che si esprime soprattutto con una specifica forma di “vuoto mentale”. Parole chiave: , disoccupazione, Kafka, narrazioni del lavoro

  13. La pianificazione del paesaggio: principi innovativi ed esperienze applicate. il caso studio della Valle dei Templi di Agrigento

    Directory of Open Access Journals (Sweden)

    Giuliana Campioni

    2015-11-01

    Full Text Available La Convenzione Europea del Paesaggio, sottoscritta il 20 ottobre 2000 dagli Stati membri del Consiglio d’Europa, aggiorna il concetto stesso di paesaggio, direzionandolo verso lo sviluppo sostenibile. Il piano del paesaggio redatto per la Valle dei Templi di Agrigento, una fra le più importanti aree archeologiche protette della Sicilia, applica le nuove idee della Convenzione Europea, al fine di dimostrare che la conservazione, pianificazione e gestione effettiva di una eredità paesaggistica di questo tipo consiste in un processo di arricchimento e di crescita delle diversità e, soprattutto, nel provocare un’evoluzione e uno sviluppo equilibrati. D’altro canto, se il caso studio del paesaggio di Agrigento è essenzialmente riferito ad un patrimonio storico di eccezionale interesse, risultato di rilevanti diversità ambientali e culturali, bisogna anche ricordare che esso costituisce una risorsa economica da cui possono essere estratti particolari benefici, con particolare riferimento al turismo. 

  14. Notas críticas sobre la ética religiosa del trabajo en el Opus Dei

    Directory of Open Access Journals (Sweden)

    Antoni Jesús Aguiló Bonet

    2009-07-01

    Full Text Available El objetivo de este artículo es el de realizar una exposición crítica de los principales contenidos de la ética religiosa del trabajo del Opus Dei, basada en la concepción del trabajo como requerimiento divino y la doctrina de la santificación personal por medio de la actividad profesional diaria. El análisis revela la existencia de una ética de virtuosos que equipara la santidad y la perfección espiritual con el éxito social y el liderazgo profesional. Para ello adopta, en nombre de la santidad, estrategias instrumentales de acción que chocan frontalmente con la práctica y los principios del cristianismo emancipador.

  15. Monte Carlo techniques in radiation therapy

    CERN Document Server

    Verhaegen, Frank

    2013-01-01

    Modern cancer treatment relies on Monte Carlo simulations to help radiotherapists and clinical physicists better understand and compute radiation dose from imaging devices as well as exploit four-dimensional imaging data. With Monte Carlo-based treatment planning tools now available from commercial vendors, a complete transition to Monte Carlo-based dose calculation methods in radiotherapy could likely take place in the next decade. Monte Carlo Techniques in Radiation Therapy explores the use of Monte Carlo methods for modeling various features of internal and external radiation sources, including light ion beams. The book-the first of its kind-addresses applications of the Monte Carlo particle transport simulation technique in radiation therapy, mainly focusing on external beam radiotherapy and brachytherapy. It presents the mathematical and technical aspects of the methods in particle transport simulations. The book also discusses the modeling of medical linacs and other irradiation devices; issues specific...

  16. Ripensare la Grande Guerra: ancora a proposito di Viva Caporetto! La rivolta dei santi maledetti di Curzio Malaparte.

    Directory of Open Access Journals (Sweden)

    Federico Montanari

    2016-05-01

    Full Text Available La prima guerra mondiale, anche nell’occasione del suo centenario, è stata da sempre oggetto di riflessioni per quanto riguarda la memorialistica, i diari, la letteratura e il cinema. In quanto evento, come più volte sottolineato, di inizio (del “secolo breve” di cesura del tempo della modernità, di disillusione (rinarrata e raccontata per una generazione, e al contempo oggetto di mitizzazione (i fascismi e il mito delle trincee sanguinanti o di rimozione e di opposizione (per un’altra generazione, quella dell’antifascismo e della resistenza. Laboratorio sociale, scientifico e culturale ("L’officina della guerra", per dirla con Gibelli, per il rapporto fra innovazione letteraria, diaristica e percezione (da Céline a Cendrars, a Musil. Lo scopo di questa comunicazione è, tenendo conto di tale vasto orizzonte di esperienze, di riprendere un caso specifico: l’ipotesi del legame guerra/”rivoluzione possibile”, per come presentato da Curzio Malaparte nel suo Viva Caporetto! La rivolta dei santi maledetti. E’ noto il percorso complesso e contraddittori di Malaparte (dall’adesione al fascismo, fino alla sua critica e rifiuto, attraverso la visione anarchica che gli era propria, e all’avvicinarsi al partito comunista e alle idee di sinistra dopo la seconda guerra mondiale. In ogni caso, cercheremo di mostrare quali dispositivi valoriali e discorsivi vengono a costituirsi nel testo di Malaparte. Testo interessante anche per un lavoro di comparazione con altri testi e autori: sia dal punto di vista tematico che di organizzazioni dei punti di vista, nelle forme dell’enunciazione; così come delle organizzazioni narrative, che espongono la vicenda non solo della disfatta di Caporetto, ma, più in generale, del “momento in cui gli uomini decidono di smettere di combattere” e, forse, di trasformare questo momento in qualcos’altro.

  17. Il delitto di onore e l'aggravante dei “futili motivi” culturalmente (e religiosamente motivata

    Directory of Open Access Journals (Sweden)

    Germana Carobene

    2014-09-01

    Full Text Available Contributo sottoposto a valutazione. Il contributo è destinato alla pubblicazione nel volume degli Atti del Corso di formazione giuridica in materia di pari opportunità e violazione del divieto di discriminazione di genere, organizzato dal Comitato Pari Opportunità presso il Consiglio dell'Ordine degli Avvocati di Napoli, ottobre 2013- giugno 2014SOMMARIO:1. I reati culturalmente motivati e il tentato omicidio per causa di “onore” - 2. Il concetto di onore nella cultura e nella tradizione giuridica dei Paesi mussulmani - 3. L'aggravante dei futili motivi nel nostro sistema penale - 4. Considerazioni conclusive. ABSTRACT The crime of honor and the aggravating factor of the trivial reasons' culturally (and religiously motivated A recent case law of the Italian Court of Cassation, on 2013, ruled that, in the case of the attempted murder of a daughter, trivial reasons cannot be considered based on the honor of the family and the violation of a fundamental religious precept. The evaluation of these cases then relates to that, of a much broader scope, linked to the concept of 'cultural crimes' or cultural defence. It is necessary, however, to perform a careful balancing between guilt and offensiveness proportion on the one hand and, on the other hand, to consider the extent to which the author of a culturally motivated crime can enjoy a punitive treatment, though attenuated compared to those who commit the same crime without a cultural motivation. A judgment intrinsically linked to a cultural and ethical relativism, cannot be accepted that though respecting the multiculturalism of the western society in general, and of the Italian one in particular, must always find its legitimacy by submitting to the principles and values on which the Italian Constitution is founded.

  18. Mean field simulation for Monte Carlo integration

    CERN Document Server

    Del Moral, Pierre

    2013-01-01

    In the last three decades, there has been a dramatic increase in the use of interacting particle methods as a powerful tool in real-world applications of Monte Carlo simulation in computational physics, population biology, computer sciences, and statistical machine learning. Ideally suited to parallel and distributed computation, these advanced particle algorithms include nonlinear interacting jump diffusions; quantum, diffusion, and resampled Monte Carlo methods; Feynman-Kac particle models; genetic and evolutionary algorithms; sequential Monte Carlo methods; adaptive and interacting Marko

  19. Monte Carlo simulations of neutron scattering instruments

    International Nuclear Information System (INIS)

    Aestrand, Per-Olof; Copenhagen Univ.; Lefmann, K.; Nielsen, K.

    2001-01-01

    A Monte Carlo simulation is an important computational tool used in many areas of science and engineering. The use of Monte Carlo techniques for simulating neutron scattering instruments is discussed. The basic ideas, techniques and approximations are presented. Since the construction of a neutron scattering instrument is very expensive, Monte Carlo software used for design of instruments have to be validated and tested extensively. The McStas software was designed with these aspects in mind and some of the basic principles of the McStas software will be discussed. Finally, some future prospects are discussed for using Monte Carlo simulations in optimizing neutron scattering experiments. (R.P.)

  20. Monte Carlo surface flux tallies

    International Nuclear Information System (INIS)

    Favorite, Jeffrey A.

    2010-01-01

    Particle fluxes on surfaces are difficult to calculate with Monte Carlo codes because the score requires a division by the surface-crossing angle cosine, and grazing angles lead to inaccuracies. We revisit the standard practice of dividing by half of a cosine 'cutoff' for particles whose surface-crossing cosines are below the cutoff. The theory behind this approximation is sound, but the application of the theory to all possible situations does not account for two implicit assumptions: (1) the grazing band must be symmetric about 0, and (2) a single linear expansion for the angular flux must be applied in the entire grazing band. These assumptions are violated in common circumstances; for example, for separate in-going and out-going flux tallies on internal surfaces, and for out-going flux tallies on external surfaces. In some situations, dividing by two-thirds of the cosine cutoff is more appropriate. If users were able to control both the cosine cutoff and the substitute value, they could use these parameters to make accurate surface flux tallies. The procedure is demonstrated in a test problem in which Monte Carlo surface fluxes in cosine bins are converted to angular fluxes and compared with the results of a discrete ordinates calculation.

  1. On the use of stochastic approximation Monte Carlo for Monte Carlo integration

    KAUST Repository

    Liang, Faming

    2009-01-01

    The stochastic approximation Monte Carlo (SAMC) algorithm has recently been proposed as a dynamic optimization algorithm in the literature. In this paper, we show in theory that the samples generated by SAMC can be used for Monte Carlo integration

  2. 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

    The variety of biomaterials applications in medical devices for substitution or functional integration of organs and tissues has remarkably grown. This has allowed an increased survival of patients affected by traumatic or pathologic events. Biomaterials growing variety and improvement were remarkable and constant over the last twenty years; this fact yielded important clinical effects in every medical area, especially in orthopaedics, cardiovascular surgery and dentistry. Performances of medical materials are evaluated according to their bio functionality and biocompatibility. These concepts are strongly connected: bio functionality refers to devices physical and mechanical properties which allow to perform a specific function. Several transformation methods and different processing technologies allow to obtain products having different physico-chemical and mechanical properties. Among them, chemical and physical stability, biocompatibility, possibility to undergo sterilisation process, control of gases and moisture permeability, control of biodegradation products, wear and fatigue resistance and toughness are the most relevant. Most of research efforts are devoted to improve reliability and last of biomaterials already used thanks to their bio functionality and biocompatibility. Expected developments of medial devices are associated with the design of bio artificial organs, where biomaterials act as a scaffold for the three-dimensional cells growth. [Italian] Il numero delle applicazioni dei biomateriali in dispositivi medici che sostituiscono od integrino dal punto di vista funzionale organi o tessuti e' cresciuto notevolmente. Questo ha portato ad un aumento della sopravvivenza dei pazienti colpiti da eventi patologici o traumatici. La crescita ed il perfezionamento dei biomateriali e' stata, infatti, nell'ultimo ventennio considerevole e costante ed ha avuto importanti ricadute cliniche in tutte le discipline mediche ed in particolare in

  3. La qualitá percepita dei pazienti con infezione da HIV presso il servizio di diagnosi e cura dell' AIDS di Novara

    Directory of Open Access Journals (Sweden)

    M. Renna

    2003-05-01

    Full Text Available

    Obiettivi: costruire e sperimentare un modello per lo studio della qualità percepita dai pazienti affetti da HIV/AIDS.

    Metodi: è stato condotto uno studio di tipo osservazionale descrittivo mediante un’indagine con l’utilizzo di un questionario di soddisfazione presso il Servizio di diagnosi e terapia dell’AIDS dell’UOA di Malattie Infettive dell’ASO “Maggiore della Carità” di Novara. I dati sono stati analizzati mediante l’analisi fattoriale e l’analisi dei cluster.

    Risultati: il campione è stato rappresentato da 62 soggetti (35 uomini e 27 donne, età media di 39,40 anni. Sono stati identificati tre fattori principali determinanti la soddisfazione dei pazienti: l’assistenza infermieristica (che ha spiegato il 24,03% della variabilità delle risposte, l’assistenza medica (21,18% e l’organizzazione del servizio (22,22%. Nel dettaglio livelli di soddisfazione elevati sono stati registrati per la qualità dell’assistenza del personale, la competenza dei medici ed il funzionamento della terapia, mentre i più bassi sono stati misurati per il rispetto della privacy e la disponibilità di servizi accessori. L’analisi dei cluster ha permesso di aggregare gli utenti in 3 gruppi in base al livello di soddisfazione. I fattori che hanno maggiormente determinato il diverso livello di soddisfazione misurato nei tre gruppi sono stati: la prima accoglienza presso il servizio, il livello di informazione ricevuto e l’efficacia nel controllo del dolore e dei sintomi.

    Conclusioni: il modello di analisi adottato ha reso possibile l’identificazione dei determinanti della soddisfazione degli utenti afferenti al servizio, evidenziando gli elementi di criticità del percorso assistenziale. I risultati hanno dimostrato la necessità per gli studi di valutazione della qualità percepita di adottare i metodi e gli strumenti della ricerca

  4. Favelleran di te sempre le stelle Galileo, i primi Lincei e l'astronomia : Biblioteca dell'Accademia Nazionale dei Lincei e Corsiniana, Roma 6 aprile - 30 giugno 2009

    CERN Document Server

    Romanello, Alessandro; Trentini, Andrea

    2009-01-01

    Catalogo dell'esposizione del prezioso patrimonio custodito nella Biblioteca dell'Accademia dei Lincei, costituito da documenti manoscritti riguardanti gli esordi e da libri stampati di Galileo e su Galileo.

  5. General Monte Carlo code MONK

    International Nuclear Information System (INIS)

    Moore, J.G.

    1974-01-01

    The Monte Carlo code MONK is a general program written to provide a high degree of flexibility to the user. MONK is distinguished by its detailed representation of nuclear data in point form i.e., the cross-section is tabulated at specific energies instead of the more usual group representation. The nuclear data are unadjusted in the point form but recently the code has been modified to accept adjusted group data as used in fast and thermal reactor applications. The various geometrical handling capabilities and importance sampling techniques are described. In addition to the nuclear data aspects, the following features are also described; geometrical handling routines, tracking cycles, neutron source and output facilities. 12 references. (U.S.)

  6. Monte Carlo lattice program KIM

    International Nuclear Information System (INIS)

    Cupini, E.; De Matteis, A.; Simonini, R.

    1980-01-01

    The Monte Carlo program KIM solves the steady-state linear neutron transport equation for a fixed-source problem or, by successive fixed-source runs, for the eigenvalue problem, in a two-dimensional thermal reactor lattice. Fluxes and reaction rates are the main quantities computed by the program, from which power distribution and few-group averaged cross sections are derived. The simulation ranges from 10 MeV to zero and includes anisotropic and inelastic scattering in the fast energy region, the epithermal Doppler broadening of the resonances of some nuclides, and the thermalization phenomenon by taking into account the thermal velocity distribution of some molecules. Besides the well known combinatorial geometry, the program allows complex configurations to be represented by a discrete set of points, an approach greatly improving calculation speed

  7. Advanced Computational Methods for Monte Carlo Calculations

    Energy Technology Data Exchange (ETDEWEB)

    Brown, Forrest B. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2018-01-12

    This course is intended for graduate students who already have a basic understanding of Monte Carlo methods. It focuses on advanced topics that may be needed for thesis research, for developing new state-of-the-art methods, or for working with modern production Monte Carlo codes.

  8. Nested Sampling with Constrained Hamiltonian Monte Carlo

    OpenAIRE

    Betancourt, M. J.

    2010-01-01

    Nested sampling is a powerful approach to Bayesian inference ultimately limited by the computationally demanding task of sampling from a heavily constrained probability distribution. An effective algorithm in its own right, Hamiltonian Monte Carlo is readily adapted to efficiently sample from any smooth, constrained distribution. Utilizing this constrained Hamiltonian Monte Carlo, I introduce a general implementation of the nested sampling algorithm.

  9. Monte Carlo Treatment Planning for Advanced Radiotherapy

    DEFF Research Database (Denmark)

    Cronholm, Rickard

    This Ph.d. project describes the development of a workflow for Monte Carlo Treatment Planning for clinical radiotherapy plans. The workflow may be utilized to perform an independent dose verification of treatment plans. Modern radiotherapy treatment delivery is often conducted by dynamically...... modulating the intensity of the field during the irradiation. The workflow described has the potential to fully model the dynamic delivery, including gantry rotation during irradiation, of modern radiotherapy. Three corner stones of Monte Carlo Treatment Planning are identified: Building, commissioning...... and validation of a Monte Carlo model of a medical linear accelerator (i), converting a CT scan of a patient to a Monte Carlo compliant phantom (ii) and translating the treatment plan parameters (including beam energy, angles of incidence, collimator settings etc) to a Monte Carlo input file (iii). A protocol...

  10. The MC21 Monte Carlo Transport Code

    International Nuclear Information System (INIS)

    Sutton TM; Donovan TJ; Trumbull TH; Dobreff PS; Caro E; Griesheimer DP; Tyburski LJ; Carpenter DC; Joo H

    2007-01-01

    MC21 is a new Monte Carlo neutron and photon transport code currently under joint development at the Knolls Atomic Power Laboratory and the Bettis Atomic Power Laboratory. MC21 is the Monte Carlo transport kernel of the broader Common Monte Carlo Design Tool (CMCDT), which is also currently under development. The vision for CMCDT is to provide an automated, computer-aided modeling and post-processing environment integrated with a Monte Carlo solver that is optimized for reactor analysis. CMCDT represents a strategy to push the Monte Carlo method beyond its traditional role as a benchmarking tool or ''tool of last resort'' and into a dominant design role. This paper describes various aspects of the code, including the neutron physics and nuclear data treatments, the geometry representation, and the tally and depletion capabilities

  11. Monte Carlo simulation in nuclear medicine

    International Nuclear Information System (INIS)

    Morel, Ch.

    2007-01-01

    The Monte Carlo method allows for simulating random processes by using series of pseudo-random numbers. It became an important tool in nuclear medicine to assist in the design of new medical imaging devices, optimise their use and analyse their data. Presently, the sophistication of the simulation tools allows the introduction of Monte Carlo predictions in data correction and image reconstruction processes. The availability to simulate time dependent processes opens up new horizons for Monte Carlo simulation in nuclear medicine. In a near future, these developments will allow to tackle simultaneously imaging and dosimetry issues and soon, case system Monte Carlo simulations may become part of the nuclear medicine diagnostic process. This paper describes some Monte Carlo method basics and the sampling methods that were developed for it. It gives a referenced list of different simulation software used in nuclear medicine and enumerates some of their present and prospective applications. (author)

  12. 180 meteorological stations data analysis to find out a meteodiffusivity index of sites; Analisi dei dati relativi a 180 stazioni meteorologiche al fine di individuare un indice per la caratterizzazione meteodiffusiva dei siti

    Energy Technology Data Exchange (ETDEWEB)

    Cagnetti, P.; Grandoni, G.; Mammarella, M.C.; Pellegrini, A.; Racalbuto, S.; Boccadoro, M.; Fedele, P. [ENEA, Centro Ricerche Casaccia, Rome (Italy). Dipt. Ambiente

    1999-07-01

    The present work has been done during the preparatory events of the National Conference on Energy and Environment (CNEA), studying the diffusive properties of the lower layers of the atmosphere, in order to find out a set of air quality indicators for urban areas. The data of 180 meteorological stations of the Italian Air Force Meteorological Service cover the whole Italian territory and are easily available; for this reason, this study, is based on those data. By analysing the available data, the variability range of the considered parameters was investigated and then an attempt was done to combine those parameters in order to describe, with a general index related to each site, the higher or lower attitude to diffuse pollutants released in the atmosphere. After that, the sites have been classified by their capacity of dispersion in atmosphere, making use of the meteo-diffusivity index described above, and pointing out the importance of meteorology in the study of the air quality of urban sites. [Italian] Questo lavoro e' stato svolto durante gli eventi preparatori della Conferenza Nazionale Energia Ambiente (CNEA), con lo scopo di individuare un set di indicatori della qualita' dell'aria in aree urbane, sulla base di studi e ricerche sui parametri meteodiffusivi dei bassi strati dell'atmosfera. Sono stati presi in considerazione, perche' subito fruibili e a diffusione nazionale, i dati provenienti dalle 180 stazioni meteorologiche dell'Areonautica Militare. Dopo un'analisi di tali dati al fine di individuare l'intervallo di variabilita' dei parametri meteorologici presi in considerazione, e' stata proposta una combinazione di tali parametri in grado di descrivere, sotto forma di un indice generale ed in relazione a tutti i siti considerati, la maggiore o minore tendenza alla diffusione degli inquinanti immessi in atmosfera. Sulla base di tale definizione di un indice di meteodiffusivita', sono stati

  13. L'aumento dei prezzi delle attività e della politica monetaria (The increase in asset prices and monetary policy

    Directory of Open Access Journals (Sweden)

    Charles P. Kindleberger

    2009-12-01

    Full Text Available L’inflazione degli asset, a differenza dell’inflazione ordinaria, che si riferisce a  l'aumento dei prezzi dei beni di consumo, merci all'ingrosso, o il deflatore del reddito nazionale, è un termine che non è in uso in occidente, ma corrente in Giappone. Ci sono momenti in cui gli assets aumenteranno di prezzo in modo inflazionistico, un boom o anche una bolla, mentre i prezzi dell’output sono relativamente stabili o addirittura in calo. Asset inflation, as distinguished from ordinary inflation, the latter referring to rising prices of consumer goods, wholesale commodities, or the national-income deflator, is a phrase not in use in the west, but current in Japan. There are times when assets rise in price in an inflationary way, a boom or even a bubble, while output prices are relatively stable or even declining. JEL Codes: F3, G1, N1, B5 

  14. THE DRAINAGE EFFICIENCY INDEX (DEI) AS AN MORPHOLOGIAL INDICATOR OF LANDSLIDE SPATIAL OCCURRENCE IN MOUNTAINOUS CATCHMENTS. A case of study applied in the mountainous region of Brazilian Southeastern.

    Science.gov (United States)

    Henrique Muniz Lima, Pedro; Luiza Coelho Netto, Ana; do Couto Fernandes, Manoel

    2016-04-01

    Morphometric parameters, acquired notoriety mainly after the Drainage Density proposition (Horton 1932, 1945) and after they were applied by geomorphologists on the perspective to understand landscape functionalities, quantifying their characteristics through parameters and indexes. After the drainage density, many other parameters which describe the basin characteristics, behavior and dynamics have been proposed. Among them, for example, the DEI was proposed by Coelho Netto and contributors during the 80's, while they were seek to understand the hydrological and erosive dynamics on Bananal river basin (Brazilian Southeastern). Through this investigations the DEI was created, revealing the importance of parameters as hollow and drainage density, conjugated to the topographic gradient (Meis et al. 1982) who prosecute controls on the water flow efficiency along the hollows in order to activate the regressive erosion of the main channel. Later on this index was applied on the basin scale in several works developed in mountainous regions, showing a remarkable correlation with the occurrence of landslides such as showed by Coelho Netto et al. (2007); that posteriorly use this index as one of the components of the landslide susceptibility map for the Tijuca Massif, located in Rio de Janeiro Municipality. This work aims to establish patterns of the DEI index values (applied to mountainous low order basins) and the relationship on the occurrence of Debriflows or shallow translational slides. For this, the DEI index was applied on 4 different study areas located on the Southeastern mountainous region of Brazil to address deeply the connection between the index and the occurrence of landslides of different types applied for first and second order basins. The major study area is the Córrego Dantas Basin, situated in Nova Friburgo municipality (RJ), which is a 53 km² basin was affected by 327 landslides caused by a heavy rainfall on January 2011; Coelho Netto et al. (in

  15. Da Rabelais a Zola, da Erasmo a Camus: la psicologia del processo, le intuizioni dei grandi autori, la conferma delle scienze cognitive

    Directory of Open Access Journals (Sweden)

    Carlo Bona

    2012-06-01

    Full Text Available Rabelais, Zola, Camus hanno intuito che le sentenze spesso si reggono su complessi meccanismi psicologici, oltre che sulla razionalità giuridica. Ci si chiede se queste intuizioni trovino conferma nelle più recenti acquisizioni della psicologia della decisione e delle scienze cognitive. Per rispondere al quesito si analizzano passi del Gargantua e Pantagruele, di Thérèse Raquin, de Lo straniero, mettendoli a confronto con alcuni esperimenti condotti in ambito psicologico. Si dimostra come Rabelais abbia correttamente intuito quanto rilevino le euristiche nella decisione, come Zola abbia colto il ruolo delle aspettative nella percezione da parte dei testi, come Camus abbia descritto le distorsioni che si possono produrre nella fase narrativa della testimonianza. Se ne conclude che a volte la materia della giustizia si intende meglio esplorando le opere dei grandi autori che non, per dirla con Erasmo, ammucchiando glosse su glosse.

  16. IL SAPERE …..E’ Libere dissertazioni sul trasversale gioco dei saperi nella promozione sociale e culturale del ben vivere urbano.

    Directory of Open Access Journals (Sweden)

    Mario Coletta

    2013-07-01

    Full Text Available Il Sapere filosofico, sin dal suo primo manifestarsi, detta ordine spaziale ed organizzativo alla vita della città, facendo scuola di pensiero e di azione, di razionalizzazione degli spazi, di organizzazione delle attività, di progettazione e di amministrazione gestionale, conferendo equilibri agli assetti insediativi, mediando esigenze, aspirazioni, necessità ed interessi dei singoli, con il tessere normativo dei reciproci gradi di libertà, dando forza all’insieme senza indebolire le parti che concorrono a determinarlo. L’urbanistica si configura come la figlia primogenita della Filosofia ( etimologicamente intesa come “amore della sapienza”, che ha scelto la città come luogo di sua privilegiata residenza dalla quale si dipartono e nella quale  è giusto che convergano le molteplici irradiazioni disciplinari dell’umano sapere il cui “gioco” non abbia a convertirsi in “giogo”.

  17. Bico 2: second national intercomparison campaign of WBC centres working in Italy; Bico 2: la seconda campagna MIDIA di interconfronto dei WBC operanti in Italia

    Energy Technology Data Exchange (ETDEWEB)

    Castellani, C.M.; Battisti, P.; Tarroni, G. [ENEA, Centro Ricerche `Ezio Clementel`, Bologna (Italy). Dip. Ambiente

    1998-12-31

    During the period November 1994 - May 1995 the coordinating group of WBC centres working in Italy organised the 2. national intercalibration and intercomparison campaign. A BOMAB phantom was used filled with four radionuclides gel solution with gamma energy emissions ranging between 100 keV and 2 MeV. 17 out of 21 Italian WBC centres took part in the campaign. Through the intercalibration, organised according to internationally accepted methodologies, each WBC centre could check its own calibration procedures. many intermediate data, collected for the methodologies and measurement procedures intercomparison, permitted analyses and comparison of uncertainly causes in a WBC measurement of the internal contamination. A proposal of MDA definition and assessment procedure resulted from the intercomparison campaign. [Italiano] Il Coordinamento dei Centri WBC operanti in Italia ha organizzato la seconda campagna di intercalibrazione ed interconfronto nazionale basata sulle misure di un fantoccio BOMAB riempito con una soluzione radioattiva gelificata contenente 4 radionuclidi con emissioni gamma nell`intervallo energetico compreso fra 100 keV e 2 MeV. Alla campagna, che si e` svolta fra novembre 1994 e maggio 1995, hanno partecipato 17 dei 21 Centri WBC censiti in Italia. L`intercalibrazione e` stata organizzata secondo criteri ormai consolidati in campo internazionale ed ha permesso ad ognuno dei partecipanti di verificare le proprie procedure di calibrazione. Per l`interconfronto delle procedure e dei metodi di misura impiegati e` stata raccolta una serie di dati intermedi che hanno consentito di analizzare e confrontare le fonti di incertezza insite nella misura di contaminazione interna nell`uomo tramite WBC. Cio` ha infine reso possibile una proposta di definizione e di procedura di determinazione del valore della minima attivita` rivelabile (MDA) in accordo con le piu` recenti tendenze in campo internazionale.

  18. Studio della superficie degli impianti dentali in titanio: La nanotecnologia nella valutazione delle nuove superfici implantari in rapporto all'osteointegrazione dei mascellari

    OpenAIRE

    Ricci, Emanuele

    2015-01-01

    Il presente lavoro parte dalla descrizione dei processi di rimodellamento osseo mascellare a seguito della perdita di elementi dentari e la successiva riabilitazione mediante impianto dentale osteointegrato. Approfondiremo proprio i complessi aspetti dell’osteointegrazione su superfici implantari in titanio sia a livello micro che macroscopico. Nel campo dell’implantologia, infatti, il titanio risulta essere il materiale maggiormente impiegato in virtù della sua eccellente biocompatibilità...

  19. LA FORMACIÓN DE UNA NUEVA MENTALIDAD RELIGIOSA DE LA ELITE EMPRESARIAL DURANTE LA DICTADURA MILITAR, 1974-1990. EL CATOLICISMO EMPRESARIAL DEL OPUS DEI.

    Directory of Open Access Journals (Sweden)

    Fabián Gaspar Bustamante Olguín

    2010-04-01

    Full Text Available Este artículo tiene como objetivo comprender las claves de la formación de la nueva mentalidad religiosa de la elite empresarial, nacida durante la dictadura militar, a través del análisis de los postulados de Monseñor Josemaría Escrivá de Balaguer, líder y fundador del Opus Dei. La interrogante de este artículo es ¿de qué manera el Opus Dei le imprimió un nuevo ethos cultural y una justificación ideológica al empresariado y a su sistema neoliberal? ¿Cuánto de esamentalidad religiosa conservadora aportó al proyecto económico de la elite empresarial? De lo anterior, se sostiene que los planteamientos del Opus Dei, basados en la santificación del trabajo ordinario y la justificación que hacen de la riqueza, permitieron sintetizar los valores tradicionales católicos de la élite con las exigencias de la modernización económica capitalista neoliberal.

  20. Il contributo dell'ECU alla stabilità dei cambi: una replica. (The contribution of the ECU to exchange-rate stability. A comment

    Directory of Open Access Journals (Sweden)

    M. SARCINELLI

    2013-12-01

    Full Text Available L'articolo è una breve nota critica alcuni elementi essenziali di Jager e De Jong del potenziale impatto del dell'ECU privato sulla stabilità dei tassi di cambio mondiale ed europeo ( 1988 . L'autore fornisce tre punti di critica che minano l'analisi di quel articolo. In primo luogo , l'ECU deve essere considerata in tutte le sue funzioni di una valuta di riserva internazionale e non solo come valuta di investimento . In secondo luogo, la restrittività delle assunzioni sottostanti l'approccio di portafoglio fanno esito degli autori inutile nella pratica . In terzo luogo, il risultato dei loro calcoli favorisce l'ipotesi che la centralina crea stabilità dei cambi The article is a brief note criticising some essential elements of Jager and De Jong’s The private ECU’s potential impact on Global and European exchange-rate stability (1988. The author provides three points of criticism which undermine that article’s analysis. Firstly, the ECU ought to be considered in all its functions of an international reserve currency and not only as an investment currency. Secondly, the restrictiveness of the assumptions underlying the portfolio approach make the authors’ outcome useless in practice. Thirdly, the outcome of their calculations favours the hypothesis that the ECU creates exchange-rate stability.JEL: F33, F36

  1. La parola a mamme e papà: cosa pensano i genitori della propria efficacia educativa e dei bisogni delle famiglie

    Directory of Open Access Journals (Sweden)

    Alessandra Gigli

    2010-02-01

    Full Text Available Famiglie in crisi, genitori assenti, distratti, tendenti alla delega che non fanno fronte alle proprie responsabilità, incapaci di porre limiti e regole ai propri figli: lo stereotipo negativo di “famiglia incapace di educare” sembra ormai consolidato e socialmente condiviso anche da parte di molti operatori dei servizi per la prima infanzia. Per evitare atteggiamenti giudicanti che possono ulteriormente indebolire il ruolo educativo delle famiglie ed ostacolare lo sviluppo di un rapporto di cooperazione, per evitare che si sviluppi sfiducia reciproca tra educatori/insegnanti e genitori, la presente ricerca è stata finalizzata a comprendere il punto di vista dei genitori su una serie di elementi caratterizzanti il “quotidiano dell’educazione” in famiglia. Con la rilevazione effettuata, tramite focus group e questionari, si è cercato di mettere a fuoco il punto di vista dei genitori, di bambini in età 0-6, su alcuni temi tra cui: cosa si inceppa e cosa ostacola l’esercizio delle funzioni normative da parte di padri e madri; il modo in cui vengono condivise le funzioni di cura nella coppia; le coordinate della rete sociale che può sostenere le famiglie nel loro compito; lo stato di salute della relazione educativa e le idee di “buona educazione” più diffuse.

  2. Mapping of critical loads of acidity for the Italian terrestrial ecosystems; Mappa dei carichi critici di acidita' totale riferita al territorio italiano

    Energy Technology Data Exchange (ETDEWEB)

    Bonanni, P.; Brini, S.; Delmonaco, G.; Liburdi, C.; Trocciola, A.; Vetrella, G. [ENEA, Centro Ricerche Casaccia, Rome (Italy). Dipt. Ambiente

    1999-07-01

    In this report the mapping of critical loads of acidity for the Italian terrestrial ecosystems is presented. The level 0 method (Stockholm Environment Institute) has been used to determine sensitivity to acid deposition; this semi-quantitative method has been modified to address some Italian characteristics. The sensitivity of the Italian soils to acidification is not particularly elevated: there are really only few small areas with poor tolerance to acid depositions in the north-east Italy, Alpine and Prealpine region. [Italian] Nel presente relazione vengono riportati i risultati della mappatura riferita ad ecosistemi terrestri del territorio italiano, dei carichi critici per l'acidita' totale. Il calcolo dei carichi e' stato eseguito sulla base della metodologia messa a punto dallo Stockholm Environment Institute con alcune modifiche per adattarlo meglio alle caratteristiche del territorio italiano. Si dimostra che la sensibilita' dei suoli italiani all'acidificazione non sia particolarmente elevata: sono state riscontrate infatti solo alcune aree, peraltro con superficie limitata, con una scarsa tolleranza alle deposizioni acide nelle zone del Nord Est, in zona alpina e prealpina.

  3. Role of land filling in the modern strategies for solid waste management; Il ruolo della discarica nelle moderne strategie di smaltimento dei rifiuti solidi urbani

    Energy Technology Data Exchange (ETDEWEB)

    Cossu, R.; Lavagnolo, M. C.; Raga, R. [Padua Univ., Padua (Italy). Dipt. di Ingegneria, Idraulica, Marittima, Ambientale e Geotecnica

    2001-09-01

    The new environmental regulations in Europe require higher standards for design and management of new landfills. Municipal solid wastes (MSW) have to be pretreated before land filling, in order to enable strong reduction of landfill emissions and environmental impact. The paper briefly describes the role of new landfills in solid waste management and the influence of some measures on the reduction of emissions and environmental impact. [Italian] In base alle nuove Direttive italiane e comunitarie, la discarica controllata e' destinata ad avere anche in futuro un ruolo di primo piano nella gestione dei rifiuti solidi urbani. In particolare, saranno destinati a smaltimento in discarica rifiuti pretrattati che garantiscano limitata putrescibilita' e minore impatto ambientale della discarica. Nell'articolo vengono esposte alcune considerazioni sul ruolo delle discariche nelle moderne strategie di smaltimento dei rifiuti solidi urbani, sugli effetti del pretrattamento dei rifiuti sulle emissioni di biogas e percolato dalle discariche e sulle caratteristiche idrauliche e meccaniche delle discariche per rifiuti pretrattati.

  4. The study of urban systems by indicators. State of the art and implementation problems; Lo studio dei sistemi urbani attraverso indicatori. Stato dell'arte e problematiche operative

    Energy Technology Data Exchange (ETDEWEB)

    Del Ciello, R; Napoleoni, S [ENEA, Divisione Caratterizzazione dell' Ambiente e del Territorio, Centro Ricerche Casaccia, S. Maria di Galeria, RM (Italy)

    2001-07-01

    The purpose of this work is to define the state of the art about the problem of the indicators and their capability in reading and foreseeing the urban complexity. Therefore, the theoretical elaborations and the suggestions developed in the report try to convert the different contributions in the Italian and international literature in a frame-work, focusing on those arguments which assume a key role in the study of the urban areas: (a) the problematic definition of the administrative, physics and functional boarders of the cities; (b) the selection of the indicators that describe the urban areas; (c) the description and quality of life and of environment quality in the cities; (d) the sustainability in urban areas. [Italian] Il lavoro si propone di delineare lo stato dell'arte sul problema degli indicatori e sulla loro capacita' di leggere e prevedere la complessita' urbana. Le elaborazioni teoriche e i suggerimenti metodologici sviluppati nel rapporto tentano dunque di tradurre in protocolli di lavoro i diversi contributi prodotti negli ultimi anni nella letteratura italiana e internazionale concentrando in particolare l'attenzione su quei temi che all'interno dello studio dei sistemi urbani assumono un ruolo chiave: (a) la problematica definizione dei confini amministrativi, fisici e funzionali delle citta'; (b) la selezione degli indicatori che descrivono con piu' efficacia il sistema urbano; (c) le dimensioni e la misura della qualita' della vita e dell'ambiente nelle citta'; (d) la sostenibilita' all'interno dei sistemi urbani.

  5. Importance iteration in MORSE Monte Carlo calculations

    International Nuclear Information System (INIS)

    Kloosterman, J.L.; Hoogenboom, J.E.

    1994-01-01

    An expression to calculate point values (the expected detector response of a particle emerging from a collision or the source) is derived and implemented in the MORSE-SGC/S Monte Carlo code. It is outlined how these point values can be smoothed as a function of energy and as a function of the optical thickness between the detector and the source. The smoothed point values are subsequently used to calculate the biasing parameters of the Monte Carlo runs to follow. The method is illustrated by an example that shows that the obtained biasing parameters lead to a more efficient Monte Carlo calculation

  6. Monte Carlo approaches to light nuclei

    International Nuclear Information System (INIS)

    Carlson, J.

    1990-01-01

    Significant progress has been made recently in the application of Monte Carlo methods to the study of light nuclei. We review new Green's function Monte Carlo results for the alpha particle, Variational Monte Carlo studies of 16 O, and methods for low-energy scattering and transitions. Through these calculations, a coherent picture of the structure and electromagnetic properties of light nuclei has arisen. In particular, we examine the effect of the three-nucleon interaction and the importance of exchange currents in a variety of experimentally measured properties, including form factors and capture cross sections. 29 refs., 7 figs

  7. Monte Carlo approaches to light nuclei

    Energy Technology Data Exchange (ETDEWEB)

    Carlson, J.

    1990-01-01

    Significant progress has been made recently in the application of Monte Carlo methods to the study of light nuclei. We review new Green's function Monte Carlo results for the alpha particle, Variational Monte Carlo studies of {sup 16}O, and methods for low-energy scattering and transitions. Through these calculations, a coherent picture of the structure and electromagnetic properties of light nuclei has arisen. In particular, we examine the effect of the three-nucleon interaction and the importance of exchange currents in a variety of experimentally measured properties, including form factors and capture cross sections. 29 refs., 7 figs.

  8. Importance iteration in MORSE Monte Carlo calculations

    International Nuclear Information System (INIS)

    Kloosterman, J.L.; Hoogenboom, J.E.

    1994-02-01

    An expression to calculate point values (the expected detector response of a particle emerging from a collision or the source) is derived and implemented in the MORSE-SGC/S Monte Carlo code. It is outlined how these point values can be smoothed as a function of energy and as a function of the optical thickness between the detector and the source. The smoothed point values are subsequently used to calculate the biasing parameters of the Monte Carlo runs to follow. The method is illustrated by an example, which shows that the obtained biasing parameters lead to a more efficient Monte Carlo calculation. (orig.)

  9. Monte carlo simulation for soot dynamics

    KAUST Repository

    Zhou, Kun

    2012-01-01

    A new Monte Carlo method termed Comb-like frame Monte Carlo is developed to simulate the soot dynamics. Detailed stochastic error analysis is provided. Comb-like frame Monte Carlo is coupled with the gas phase solver Chemkin II to simulate soot formation in a 1-D premixed burner stabilized flame. The simulated soot number density, volume fraction, and particle size distribution all agree well with the measurement available in literature. The origin of the bimodal distribution of particle size distribution is revealed with quantitative proof.

  10. Monte Carlo Codes Invited Session

    International Nuclear Information System (INIS)

    Trama, J.C.; Malvagi, F.; Brown, F.

    2013-01-01

    This document lists 22 Monte Carlo codes used in radiation transport applications throughout the world. For each code the names of the organization and country and/or place are given. We have the following computer codes. 1) ARCHER, USA, RPI; 2) COG11, USA, LLNL; 3) DIANE, France, CEA/DAM Bruyeres; 4) FLUKA, Italy and CERN, INFN and CERN; 5) GEANT4, International GEANT4 collaboration; 6) KENO and MONACO (SCALE), USA, ORNL; 7) MC21, USA, KAPL and Bettis; 8) MCATK, USA, LANL; 9) MCCARD, South Korea, Seoul National University; 10) MCNP6, USA, LANL; 11) MCU, Russia, Kurchatov Institute; 12) MONK and MCBEND, United Kingdom, AMEC; 13) MORET5, France, IRSN Fontenay-aux-Roses; 14) MVP2, Japan, JAEA; 15) OPENMC, USA, MIT; 16) PENELOPE, Spain, Barcelona University; 17) PHITS, Japan, JAEA; 18) PRIZMA, Russia, VNIITF; 19) RMC, China, Tsinghua University; 20) SERPENT, Finland, VTT; 21) SUPERMONTECARLO, China, CAS INEST FDS Team Hefei; and 22) TRIPOLI-4, France, CEA Saclay

  11. Advanced computers and Monte Carlo

    International Nuclear Information System (INIS)

    Jordan, T.L.

    1979-01-01

    High-performance parallelism that is currently available is synchronous in nature. It is manifested in such architectures as Burroughs ILLIAC-IV, CDC STAR-100, TI ASC, CRI CRAY-1, ICL DAP, and many special-purpose array processors designed for signal processing. This form of parallelism has apparently not been of significant value to many important Monte Carlo calculations. Nevertheless, there is much asynchronous parallelism in many of these calculations. A model of a production code that requires up to 20 hours per problem on a CDC 7600 is studied for suitability on some asynchronous architectures that are on the drawing board. The code is described and some of its properties and resource requirements ae identified to compare with corresponding properties and resource requirements are identified to compare with corresponding properties and resource requirements are identified to compare with corresponding properties and resources of some asynchronous multiprocessor architectures. Arguments are made for programer aids and special syntax to identify and support important asynchronous parallelism. 2 figures, 5 tables

  12. Adaptive Markov Chain Monte Carlo

    KAUST Repository

    Jadoon, Khan

    2016-08-08

    A substantial interpretation of electromagnetic induction (EMI) measurements requires quantifying optimal model parameters and uncertainty of a nonlinear inverse problem. For this purpose, an adaptive Bayesian Markov chain Monte Carlo (MCMC) algorithm is used to assess multi-orientation and multi-offset EMI measurements in an agriculture field with non-saline and saline soil. In the MCMC simulations, posterior distribution was computed using Bayes rule. The electromagnetic forward model based on the full solution of Maxwell\\'s equations was used to simulate the apparent electrical conductivity measured with the configurations of EMI instrument, the CMD mini-Explorer. The model parameters and uncertainty for the three-layered earth model are investigated by using synthetic data. Our results show that in the scenario of non-saline soil, the parameters of layer thickness are not well estimated as compared to layers electrical conductivity because layer thicknesses in the model exhibits a low sensitivity to the EMI measurements, and is hence difficult to resolve. Application of the proposed MCMC based inversion to the field measurements in a drip irrigation system demonstrate that the parameters of the model can be well estimated for the saline soil as compared to the non-saline soil, and provide useful insight about parameter uncertainty for the assessment of the model outputs.

  13. Una ricerca sulla qualità della vita scolastica di bambini e bambine affetti da malattie emorragiche congenite. Lettura critica dei dati e considerazioni pedagogiche.

    Directory of Open Access Journals (Sweden)

    Alessandra Gigli

    2009-07-01

    Full Text Available Il presente rapporto di ricerca costituisce l'esito del lavoro svolto dalle ricercatrici A. Gigli, S. Demozzi del Dipartimento di Scienze dell’Educazione dell’Università di Bologna all'interno del progetto Strategico di Ateneo dal titolo “Definizione di linee guida d’intervento sui pazienti pediatrici affetti da malattie emorragiche congenite: aspetti medici, psicosociali, educativi ed etici”. L'obiettivo principale del lavoro è stato quello di analizzare il punto di vista degli insegnanti in merito alla vita scolastica dei bambini con malattie emorragiche congenite (Mec, le loro relazioni con insegnanti e compagni, i rapporti tra scuola e famiglie. Per monitorare questi aspetti legati alla vita scolastica, nel 2008 è stata realizzata un’indagine sul campo che ha coinvolto insegnanti di scuole dell’infanzia, scuole primarie, scuole secondarie di primo grado della Provincia di Bologna che hanno in classe un/a bambino/a affetti da Mec. Le rilevazioni effettuate tramite interviste semi strutturate hanno avuto i seguenti obiettivi: verificare l’esistenza di rappresentazioni “distorte” delle patologie ed eventuali pregiudizi esistenti; analizzare il processo informativo attraverso cui i docenti conoscono la situazione del bambino e vengono informati sulle Mec; rilevare i nodi problematici e punti di forza, che qualificano negativamente o positivamente le relazione scuola-famiglia; monitorare l’esistenza di pregiudizi in merito alle capacità cognitive dei bambini; verificare se, secondo i docenti, la malattia influisce sulla qualità della relazione educativa, indagando, in particolare, sugli aspetti comunicativi; rilevare eventuali problematiche di integrazione nel gruppo dei pari; verificare se l’adozione di strategie per permettere una migliore integrazione o lo svolgimento delle attività didattiche, ludiche e sportive; rilevare i bisogni formativi e informativi dei docenti. Nell’articolo si presenta una lettura

  14. Falquet de Romans, “Ma bella dompna, per vos dei esser gais” (BdT 156.8

    Directory of Open Access Journals (Sweden)

    Paolo Di Luca

    2010-08-01

    Full Text Available “Ma bella dompna per vos dei esser gais” by Falquet de Romans has been taken for a courtly song for a long time. However, the poem’s metrical form is derived directly from that of the epic, as illustrated by the use of monorhymed ‘décasyllabes’ with non-systematic epic caesura and the presence of a ‘petit vers’ at the end of each stanza. The poem may thus be defined as stanzaic but not lyric because its versification is that of the chanson de geste and its music must be that of an epic chant. Moreover, its content reflects the rhetorical structure of the ‘salut d’amor’, an epistolary genre in which the lover sends a letter to his lady asking her to respond to his love. Thus, “Ma bella dompna” should be considered a formal hybrid between ‘salut d’amor’ and ‘chanson de geste’; in this sense it is to be compared to those few compositions of an epistolary nature that employ epic form, such as Raimbaut de Vaqueiras’ famous letter to the Marquis Boniface of Monferrato, which is probably the prototype of this poetic experiment, along with two pairs of ‘laisses’ exchanged between Gui de Cavaillon and Bertran Folco d’Avignon.

  15. La Torre dei Venti di Atene. Un rilievo in remoto per lo studio e la disseminazione di un orologio archeologico

    Directory of Open Access Journals (Sweden)

    Ramona Quattrini

    2014-07-01

    Full Text Available ItLa Torre dei Venti di Atene è un manufatto di grande rilevanza storica e documentale, significativo anche per l’eccellente stato di conservazione. Mancandone una documentazione di rilievo con tecnologie attuali, è stata scelta come caso studio per verificare fattibilità e performance di un rilievo image-based, lontano dall’edificio e condotto con prese fotografiche non professionali. Gli utilizzi del modello reality-based sono la disseminazione fotorealistica, il confronto con basi di dati scientificamente affidabili e un corpus abilitante per la migliore soluzione di ricostruzione virtuale allo stato originario. In particolare il lavoro si inserisce in un quadro di studi, condotti dal nostro gruppo, nell’ambito della verifica delle rispondenze di alcuni significativi manufatti alle norme e prescrizioni vitruviane.EnThe Tower of Winds (Athens is a very important historical and archaeological monument, very well preserved. In this paper the Tower is presented as a case study, that investigates performance of image-based survey. This survey is performed with current technologies, using non metric and non professional pictures. A specific goal is a reality-based 3D model, enabling photorealistic dissemination and comparison with scientific data and historical surveys. Furthermore we obtained a corpus allowing a correct virtual archaeological reconstruction. This research falls in studies field, carried out by our group, of comparison and check between artifacts and Vitruvian standards.

  16. Convivenza delle diversità, pluralismo religioso e universalità dei diritti. Modelli di approccio. Indicazioni metodologiche

    Directory of Open Access Journals (Sweden)

    Vincenzo Turchi

    2017-05-01

    Abstract. The paper highlights the limits of the most well-known models of approach to cultural diversities, the assimilationist one and the communitarian one, which are typical, respectively, of France and England and of their colonial history. Italy has not remarkable colonial traditions and so it can be more free from the weight of the past in developing strategies able to face up to the problems of the multi-ethnic and multi-religious societies. Starting from the basic principles of pluralism and secularism (principio supremo di laicità, according to the words of Italian Constitutional Court, are examined the “Carta dei valori della cittadinanza e dell’integrazione” (15th June 2007 and the recent “Patto nazionale per un Islam italiano” (1st of February 2017. From a more general point of view, the paper describes and supports the thesis of Jacques Maritain about the foundation of human rights, the basis of a peaceful coexistence in a pluralistic society. Finally, it deals with the issue of teaching about religion and history of religions in Italian public schools. These kinds of courses should help students to get to know the religions present in our country - both the historical ones and the “new” ones, coming from the recent processes of immigration - in order to promote and increase the mutual respect and the inter-cultural dialogue.

  17. I sistemi biometrici lo sviluppo dei mercati negli Usa, UE e nel mondo. La normativa frena quello italiano

    Directory of Open Access Journals (Sweden)

    Franco Zucchetti

    2007-04-01

    Full Text Available Negli ultimi anni il settore biometrico sta compiendo, a livello mondiale, importanti passi in avanti soprattutto in termini di sviluppo e di diffusione. Questo trend positivo riguarda il mondo anglosassone e, in particolare, la realtà statunitense dove i sistemi biometrici vengono utilizzati, nelle più svariate situazioni, sia come controllo della sicurezza fisica delle persone, sia come terminali per l’autorizzazione all’accesso. La stessa diffusione non è riscontrabile nella maggior parte dei Paesi europei e in Italia dove raffrontiamo una realtà assai atipica nella quale la biometria fa un gran parlare di sé ma, in concreto, viene utilizzata con molta difficoltà. Tuttavia, un punto di contatto tra tutti gli attori europei ed extraeuropei può essere individuato nello sviluppo del settore relativo al riconoscimento biometrico applicato ai passaporti ed alle carte di identità. Il processo di globalizzazione ha generato, infatti, grandi masse di individui in continuo e costante movimento da un Paese all’altro e, contestualmente, ha prodotto una crescente domanda di sicurezza soprattutto nei confronti della minaccia terroristica. Appare chiaro, quindi, come l’identificazione certa delle persone diventi una necessità e debba presentare tecnologie simili per essere utilizzate ovunque.

  18. Immagini dietro le sbarre: l’utilizzo della fotografia per lo sviluppo dell’intelligenza emotiva dei detenuti

    Directory of Open Access Journals (Sweden)

    Emanuela Saita

    2015-12-01

    Full Text Available Nel presente contributo verrà descritto un intervento che utilizza tecniche fotografiche in attività trattamentali rivolte a soggetti in condizione di detenzione, attività le cui finalità sono la risocializzazione e la rieducazione del reo. Scopo dell'intervento è favorire lo sviluppo dell'intelligenza emotiva (IE, intesa come la capacità di comprendere e riconoscere i propri e gli altrui stati emotivi; essa infatti è associata in letteratura ad una riduzione della recidiva e ad un aumentato benessere dei soggetti reclusi. Le tecniche fotografiche costituiscono uno strumento in grado di superare barriere linguistico-culturali ed eventuali resistenze individuali per far emergere contenuti simbolici connessi a stati emotivi, credenze o percezioni. L'intervento descritto prevede incontri di gruppo, una tipologia di setting che diviene possibile strumento di apprendimento, riflessione sul sé, oltre che luogo di confronto e possibile cambiamento. La struttura degli incontri è tale da perseguire sia l'obiettivo generale (sviluppo dell'IE che obiettivi più specifici, calibrati su differenti categorie di detenuti. Ad esempio, favorire il reinserimento dopo la detenzione in caso di pene medio/brevi, piuttosto che l’accettazione della pena e l’adattamento alla vita carceraria, nel caso di pene più lunghe. Il contributo si chiude con un’apertura sulle possibili modalità di valutazione di tale intervento, al fine di giungere alla formulazione di un protocollo generalizzabile e applicabile a differenti contesti.

  19. ISS-NIH Collaborative Programme: final report of the projects; Programma di collaborazione ISS-NIH: relazioni conclusive dei progetti

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-07-01

    In July 2003, the National Institutes of Health (NIH) of the United States of America and the Istituto Superiore di Sanita (ISS) of Italy signed an agreement aimed at strengthening the ongoing research cooperation between USA and Italy. Over the years, the programme was able to create new partnerships and to foster the establishment of innovative synergies, the exchange of young researcher, and the merging of the best available skills, talents and know-how in different fields of biomedical sciences. This book contains the final report of the projects of the scientific cooperation between the two Countries. The report consists of two parts (in Italian and English) divided into four sections: Cancer, Neuroscience, Cardiovascular diseases, Infectious diseases. [Italian] Nel luglio 2003, i National Institutes of Health (NIH) americani e l'Istituto Superiore di Sanita (ISS) hanno firmato un accordo mirato a rafforzare la cooperazione scientifica tra Italia e USA. Nel corso degli anni il programma ha permesso di ampliare le collaborazioni e di promuovere nuove sinergie attraverso lo scambio di giovani ricercatori e la condivisione delle migliori competenze, conoscenze e capacita in diversi campi delle scienze biomediche. Questo volume contiene le relazioni finali dei progetti del programma di cooperazione scientifica tra i due Paesi. Il rapporto e articolato in due parti (in italiano e inglese) divise in quattro sezioni: Tumori, Neuroscienze, Malattie cardiovascolari, Malattie infettive.

  20. God’s Word in The Bible and in The Mission to Evangelize: fifty years after Dei Verbum

    Directory of Open Access Journals (Sweden)

    Johan Konings

    2015-12-01

    Full Text Available At the 50th. anniversary of the constitution Dei Verbum of Council Vatican II, we perceive its working in Catholic thought of the last decade, especially in Verbum Domini of Pope Benedict XVI, in the “document of  Aparecida” (CELAM and in Evangelii Gaudium of Pope Francis. Starting from the consideration of the dialogic word as space of creative “letting-be” for the other, we highlight the human-divine character of God’s Word as creative and “humanized” in Christ. The living Tradition of the Church, that configures in his womb the Christian Scripture as fundamental rule of its faith, keeps the memoria Christi, the Word present in celebration and announcement, not only to those who stay outside, but, urgently, in the permanent formation and mystagogical accompanying of those who are considered Christians. The memoria Christi is guarded and interpreted also in the Christian life praxis. So we evoke the complex interaction of human and divine, memory and presence, word and praxis of faith, in order to value specially the human word, if authentic and dialogic, at the service of the humanatio of God’s word, that is also divinization of human word.

  1. PER L’IMPIEGATO MILANESE E IL BUON COSTUME DEI GIOVANETTI: IL "VOCABOLARIO MANTOVANO-ITALIANO" DI FRANCESCO CHERUBINI

    Directory of Open Access Journals (Sweden)

    Mario Piotti

    2016-09-01

    Full Text Available Produzione minore nell’ambito della produzione cherubiniana, il Vocabolario mantovano-italiano consente di mostrare una tappa intermedia del lavoro di Cherubini e della sua riflessione lessicografica tra le due edizioni del Vocabolario milanese. Pur se i contemporanei non mancarono di sottolinearne alcuni limiti, l’interesse dell’opera emerge fin dalla delineazione dei destinatari: da un lato la scuola e dall’altro i funzionari pubblici che, spostandosi entro i confini del regno Lombardo-Veneto, si confrontavano con un dialetto che non comprendevano. For employees in Milan and proper behavior of young men: Francesco Cherubini’s "Vocabolario mantovano-italiano" This minor work within Cherubini’s production, the Vocabolario mantovano-italiano, represents an intermediate stage in Cherubini’s work and his lexicographical reflections between the two editions of the Vocabolario milanese. Although his contemporaries did not fail to point out some limitations, the work is striking when considering who it was intended for: schools and public officials who, moving around the Lombard-Venetian Kingdom, were confronted with a dialect they did not understand.

  2. From Point Cloud to Digital Fabrication: a Tangible Reconstruction of Ca' Venier Dei Leoni, the Guggenheim Museum in Venice

    Science.gov (United States)

    Balletti, C.; D'Agnano, F.; Guerra, F.; Vernier, P.

    2016-06-01

    The paper describes how new digital methodologies can be used within the field of Cultural Heritage, not only with the aim of documenting the actual state of an architecture but to review the past transformations it has undergone, conserving and representing these histories as well. The premise to conservation and enhancement of our Heritage is a deep study in terms of position, shape, colour, and also of the historical and artistic features. Survey methods have acquired data acquisition techniques in line with technological progress: today's electronic and IT technologies, that are the tools of modern Geomatics, allow the effective survey and representation of 3D objects, from architectural structures to sculptures or archaeological finds. Over the last few years, the methodologies of acquisition and integrated representation for 3D patrimony documentation have developed and consolidated considerably: the possibilities of the digital realm can augment the understanding and the valorisation of a monument. The specific case offered in the present paper, Ca' Venier dei Leoni, the palace where is the Guggenheim Museum in Venice, is a significant example. It suggests not only the theme of the "no longer existing", or better never built, but also the opportunity to formulate hypotheses regarding its implementation and the impact that the palace would have had in the Venetian contest.

  3. GIANFRANCO BETTETINI, Il timpano dell’occhio. Gli intrecci e i giochi dei suoni e delle immagini, Milano, Bompiani, 2009

    Directory of Open Access Journals (Sweden)

    Alessandro Bratus

    2013-12-01

    Full Text Available Il timpano dell’occhio di Gianfranco Bettetini è uno studio dedicato all’analisi semiotica dei testi audiovisivi. Nel volume l’autore si propone di indagare gli effetti che l’azione «strutturalmente sinergica e compatta» (p. 9 di suono e immagine produce sullo spettatore. Lungo tale percorso, Bettetini affronta un nodo cruciale degli studi attuali sulla comunicazione audiovisiva, offrendo allo stesso tempo un prezioso compendio della letteratura semiotica sull’argomento. Nella prima parte del volume lo studioso definisce le linee essenziali di un nuovo approccio metodologico che integra, con la sociologia e la psicologia, il quadro delle discipline che si sono occupate sistematicamente di analisi del testo filmico dal secondo dopoguerra in avanti. Nella seconda parte l’autore prende in esame quattro lungometraggi: Caterina va in città (2003 di Paolo Virzì, Notturno Bus (2007 di Davide Marengo, Il flauto magico (2007 di Kenneth Branagh e La fine del mondo – Ministoria della musica in un tempo (1969 dello stesso Bettetini.

  4. Aspettative. Corsi dei cambi a termine e riflessi sulla politica monetaria. (Expectations, foreign exchange forwards and reflections on monetary policy

    Directory of Open Access Journals (Sweden)

    A. FERRO

    2014-03-01

    Full Text Available L'articolo fornisce un'analisi preliminare sui rapporti che si possono stabilire tra i tassi di cambio a termine e i tassi di cambio secondo le aspettative di diverse ipotesi . Gli autori evidenziano le implicazioni di politica monetaria che i vari tipi di aspettative comportano. Per verificare in particolare il ruolo delle aspettative nella determinazione dei tassi di cambio, si procederà attraverso un paio di semplici test empirici che si riferiscono al prezzo a termine del marco tedesco contro la sterlina sul mercato di Francoforte nei primi quattro mesi del 1976.The paper provides preliminary analysis on the relationships that can be established between the rates of the forward exchange rate and the spot exchange rates at the various expectations hypothesis. The authors go on to highlight the implications of monetary policy that the various kinds of expectations entail. To test specifically the role of expectations in the determination of exchange rates at the end we will proceed through a couple of simple empirical tests that refer to the spot and forward prices of the Deutsche Mark against the pound on the Frankfurt market in the first four months of 1976. JEL: E52, E42, F31

  5. Aspettative. Corsi dei cambi a termine e riflessi sulla politica monetaria. (Expectations, foreign exchange forwards and reflections on monetary policy

    Directory of Open Access Journals (Sweden)

    A. FERRO

    1977-06-01

    Full Text Available L'articolo fornisce un'analisi preliminare sui rapporti che si possono stabilire tra i tassi di cambio a termine e i tassi di cambio secondo le aspettative di diverse ipotesi . Gli autori evidenziano le implicazioni di politica monetaria che i vari tipi di aspettative comportano. Per verificare in particolare il ruolo delle aspettative nella determinazione dei tassi di cambio, si procederà attraverso un paio di semplici test empirici che si riferiscono al prezzo a termine del marco tedesco contro la sterlina sul mercato di Francoforte nei primi quattro mesi del 1976. The paper provides preliminary analysis on the relationships that can be established between the rates of the forward exchange rate and the spot exchange rates at the various expectations hypothesis. The authors go on to highlight the implications of monetary policy that the various kinds of expectations entail. To test specifically the role of expectations in the determination of exchange rates at the end we will proceed through a couple of simple empirical tests that refer to the spot and forward prices of the Deutsche Mark against the pound on the Frankfurt market in the first four months of 1976. JEL: E52, E42, F31

  6. 2D and 3D optical diagnostic techniques applied to Madonna dei Fusi by Leonardo da Vinci

    Science.gov (United States)

    Fontana, R.; Gambino, M. C.; Greco, M.; Marras, L.; Materazzi, M.; Pampaloni, E.; Pelagotti, A.; Pezzati, L.; Poggi, P.; Sanapo, C.

    2005-06-01

    3D measurement and modelling have been traditionally applied to statues, buildings, archeological sites or similar large structures, but rarely to paintings. Recently, however, 3D measurements have been performed successfully also on easel paintings, allowing to detect and document the painting's surface. We used 3D models to integrate the results of various 2D imaging techniques on a common reference frame. These applications show how the 3D shape information, complemented with 2D colour maps as well as with other types of sensory data, provide the most interesting information. The 3D data acquisition was carried out by means of two devices: a high-resolution laser micro-profilometer, composed of a commercial distance meter mounted on a scanning device, and a laser-line scanner. The 2D data acquisitions were carried out using a scanning device for simultaneous RGB colour imaging and IR reflectography, and a UV fluorescence multispectral image acquisition system. We present here the results of the techniques described, applied to the analysis of an important painting of the Italian Reinassance: `Madonna dei Fusi', attributed to Leonardo da Vinci.

  7. 11th International Conference on Monte Carlo and Quasi-Monte Carlo Methods in Scientific Computing

    CERN Document Server

    Nuyens, Dirk

    2016-01-01

    This book presents the refereed proceedings of the Eleventh International Conference on Monte Carlo and Quasi-Monte Carlo Methods in Scientific Computing that was held at the University of Leuven (Belgium) in April 2014. These biennial conferences are major events for Monte Carlo and quasi-Monte Carlo researchers. The proceedings include articles based on invited lectures as well as carefully selected contributed papers on all theoretical aspects and applications of Monte Carlo and quasi-Monte Carlo methods. Offering information on the latest developments in these very active areas, this book is an excellent reference resource for theoreticians and practitioners interested in solving high-dimensional computational problems, arising, in particular, in finance, statistics and computer graphics.

  8. Quantum Monte Carlo approaches for correlated systems

    CERN Document Server

    Becca, Federico

    2017-01-01

    Over the past several decades, computational approaches to studying strongly-interacting systems have become increasingly varied and sophisticated. This book provides a comprehensive introduction to state-of-the-art quantum Monte Carlo techniques relevant for applications in correlated systems. Providing a clear overview of variational wave functions, and featuring a detailed presentation of stochastic samplings including Markov chains and Langevin dynamics, which are developed into a discussion of Monte Carlo methods. The variational technique is described, from foundations to a detailed description of its algorithms. Further topics discussed include optimisation techniques, real-time dynamics and projection methods, including Green's function, reptation and auxiliary-field Monte Carlo, from basic definitions to advanced algorithms for efficient codes, and the book concludes with recent developments on the continuum space. Quantum Monte Carlo Approaches for Correlated Systems provides an extensive reference ...

  9. Monte Carlo simulations for plasma physics

    International Nuclear Information System (INIS)

    Okamoto, M.; Murakami, S.; Nakajima, N.; Wang, W.X.

    2000-07-01

    Plasma behaviours are very complicated and the analyses are generally difficult. However, when the collisional processes play an important role in the plasma behaviour, the Monte Carlo method is often employed as a useful tool. For examples, in neutral particle injection heating (NBI heating), electron or ion cyclotron heating, and alpha heating, Coulomb collisions slow down high energetic particles and pitch angle scatter them. These processes are often studied by the Monte Carlo technique and good agreements can be obtained with the experimental results. Recently, Monte Carlo Method has been developed to study fast particle transports associated with heating and generating the radial electric field. Further it is applied to investigating the neoclassical transport in the plasma with steep gradients of density and temperatures which is beyong the conventional neoclassical theory. In this report, we briefly summarize the researches done by the present authors utilizing the Monte Carlo method. (author)

  10. Frontiers of quantum Monte Carlo workshop: preface

    International Nuclear Information System (INIS)

    Gubernatis, J.E.

    1985-01-01

    The introductory remarks, table of contents, and list of attendees are presented from the proceedings of the conference, Frontiers of Quantum Monte Carlo, which appeared in the Journal of Statistical Physics

  11. Avariide kiuste Monte Carlosse / Aare Arula

    Index Scriptorium Estoniae

    Arula, Aare

    2007-01-01

    Vt. ka Tehnika dlja Vsehh nr. 3, lk. 26-27. 26. jaanuaril 1937 Tallinnast Monte Carlo tähesõidule startinud Karl Siitanit ja tema meeskonda ootasid ees seiklused, mis oleksid neile peaaegu elu maksnud

  12. Monte Carlo code development in Los Alamos

    International Nuclear Information System (INIS)

    Carter, L.L.; Cashwell, E.D.; Everett, C.J.; Forest, C.A.; Schrandt, R.G.; Taylor, W.M.; Thompson, W.L.; Turner, G.D.

    1974-01-01

    The present status of Monte Carlo code development at Los Alamos Scientific Laboratory is discussed. A brief summary is given of several of the most important neutron, photon, and electron transport codes. 17 references. (U.S.)

  13. Experience with the Monte Carlo Method

    Energy Technology Data Exchange (ETDEWEB)

    Hussein, E M.A. [Department of Mechanical Engineering University of New Brunswick, Fredericton, N.B., (Canada)

    2007-06-15

    Monte Carlo simulation of radiation transport provides a powerful research and design tool that resembles in many aspects laboratory experiments. Moreover, Monte Carlo simulations can provide an insight not attainable in the laboratory. However, the Monte Carlo method has its limitations, which if not taken into account can result in misleading conclusions. This paper will present the experience of this author, over almost three decades, in the use of the Monte Carlo method for a variety of applications. Examples will be shown on how the method was used to explore new ideas, as a parametric study and design optimization tool, and to analyze experimental data. The consequences of not accounting in detail for detector response and the scattering of radiation by surrounding structures are two of the examples that will be presented to demonstrate the pitfall of condensed.

  14. Experience with the Monte Carlo Method

    International Nuclear Information System (INIS)

    Hussein, E.M.A.

    2007-01-01

    Monte Carlo simulation of radiation transport provides a powerful research and design tool that resembles in many aspects laboratory experiments. Moreover, Monte Carlo simulations can provide an insight not attainable in the laboratory. However, the Monte Carlo method has its limitations, which if not taken into account can result in misleading conclusions. This paper will present the experience of this author, over almost three decades, in the use of the Monte Carlo method for a variety of applications. Examples will be shown on how the method was used to explore new ideas, as a parametric study and design optimization tool, and to analyze experimental data. The consequences of not accounting in detail for detector response and the scattering of radiation by surrounding structures are two of the examples that will be presented to demonstrate the pitfall of condensed

  15. Monte Carlo Transport for Electron Thermal Transport

    Science.gov (United States)

    Chenhall, Jeffrey; Cao, Duc; Moses, Gregory

    2015-11-01

    The iSNB (implicit Schurtz Nicolai Busquet multigroup electron thermal transport method of Cao et al. is adapted into a Monte Carlo transport method in order to better model the effects of non-local behavior. The end goal is a hybrid transport-diffusion method that combines Monte Carlo Transport with a discrete diffusion Monte Carlo (DDMC). The hybrid method will combine the efficiency of a diffusion method in short mean free path regions with the accuracy of a transport method in long mean free path regions. The Monte Carlo nature of the approach allows the algorithm to be massively parallelized. Work to date on the method will be presented. This work was supported by Sandia National Laboratory - Albuquerque and the University of Rochester Laboratory for Laser Energetics.

  16. A continuation multilevel Monte Carlo algorithm

    KAUST Repository

    Collier, Nathan; Haji Ali, Abdul Lateef; Nobile, Fabio; von Schwerin, Erik; Tempone, Raul

    2014-01-01

    We propose a novel Continuation Multi Level Monte Carlo (CMLMC) algorithm for weak approximation of stochastic models. The CMLMC algorithm solves the given approximation problem for a sequence of decreasing tolerances, ending when the required error

  17. Aasta film - joonisfilm "Mont Blanc" / Verni Leivak

    Index Scriptorium Estoniae

    Leivak, Verni, 1966-

    2002-01-01

    Eesti Filmiajakirjanike Ühing andis aasta 2001 parima filmi tiitli Priit Tenderi joonisfilmile "Mont Blanc" : Eesti Joonisfilm 2001.Ka filmikriitikute eelistused kinodes ja televisioonis 2001. aastal näidatud filmide osas

  18. Simulation and the Monte Carlo method

    CERN Document Server

    Rubinstein, Reuven Y

    2016-01-01

    Simulation and the Monte Carlo Method, Third Edition reflects the latest developments in the field and presents a fully updated and comprehensive account of the major topics that have emerged in Monte Carlo simulation since the publication of the classic First Edition over more than a quarter of a century ago. While maintaining its accessible and intuitive approach, this revised edition features a wealth of up-to-date information that facilitates a deeper understanding of problem solving across a wide array of subject areas, such as engineering, statistics, computer science, mathematics, and the physical and life sciences. The book begins with a modernized introduction that addresses the basic concepts of probability, Markov processes, and convex optimization. Subsequent chapters discuss the dramatic changes that have occurred in the field of the Monte Carlo method, with coverage of many modern topics including: Markov Chain Monte Carlo, variance reduction techniques such as the transform likelihood ratio...

  19. Hybrid Monte Carlo methods in computational finance

    NARCIS (Netherlands)

    Leitao Rodriguez, A.

    2017-01-01

    Monte Carlo methods are highly appreciated and intensively employed in computational finance in the context of financial derivatives valuation or risk management. The method offers valuable advantages like flexibility, easy interpretation and straightforward implementation. Furthermore, the

  20. LCG Monte-Carlo Data Base

    CERN Document Server

    Bartalini, P.; Kryukov, A.; Selyuzhenkov, Ilya V.; Sherstnev, A.; Vologdin, A.

    2004-01-01

    We present the Monte-Carlo events Data Base (MCDB) project and its development plans. MCDB facilitates communication between authors of Monte-Carlo generators and experimental users. It also provides a convenient book-keeping and an easy access to generator level samples. The first release of MCDB is now operational for the CMS collaboration. In this paper we review the main ideas behind MCDB and discuss future plans to develop this Data Base further within the CERN LCG framework.

  1. Multilevel Monte Carlo in Approximate Bayesian Computation

    KAUST Repository

    Jasra, Ajay

    2017-02-13

    In the following article we consider approximate Bayesian computation (ABC) inference. We introduce a method for numerically approximating ABC posteriors using the multilevel Monte Carlo (MLMC). A sequential Monte Carlo version of the approach is developed and it is shown under some assumptions that for a given level of mean square error, this method for ABC has a lower cost than i.i.d. sampling from the most accurate ABC approximation. Several numerical examples are given.

  2. Monte Carlo method applied to medical physics

    International Nuclear Information System (INIS)

    Oliveira, C.; Goncalves, I.F.; Chaves, A.; Lopes, M.C.; Teixeira, N.; Matos, B.; Goncalves, I.C.; Ramalho, A.; Salgado, J.

    2000-01-01

    The main application of the Monte Carlo method to medical physics is dose calculation. This paper shows some results of two dose calculation studies and two other different applications: optimisation of neutron field for Boron Neutron Capture Therapy and optimization of a filter for a beam tube for several purposes. The time necessary for Monte Carlo calculations - the highest boundary for its intensive utilisation - is being over-passed with faster and cheaper computers. (author)

  3. 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.

  4. 3DHOP: una piattaforma flessibile per la pubblicazione e visualizzazione su Web dei risultati di digitalizzazioni 3D

    Directory of Open Access Journals (Sweden)

    Marco Potenziani

    2016-04-01

    Full Text Available 3D Heritage Online Presenter (3DHOP è una piattaforma per integrare all’interno di pagine internet modelli 3D ad alta risoluzione, quali ad esempio quelli ottenuti per scansione 3D, progettata per far fronte alle specifiche esigenze del settore Cultural Heritage (CH. 3DHOP gestisce la complessità dei dati in ingresso mediante un motore di rappresentazione e rendering multirisoluzione, pertanto, è in grado di trasmettere in modo progressivo ed efficiente anche modelli 3D di grandi dimensioni. 3DHOP fornisce una serie di template pronti all’uso per la presentazione di modelli CH, collegando la visualizzazione 3D con il resto della pagina Web e rendendo possibile la creazione di presentazioni integrate (3D ed altri contenuti multimediali. Nella sua progettazione e sviluppo abbiamo posto particolare attenzione alla facilità d'uso ed alle prestazioni della piattaforma, che dunque è caratterizzata da una curva di apprendimento sostenibile e da performance ottimali nella visualizzazione di modelli ad alta risoluzione. Grazie alla sua natura modulare e una configurazione dichiarativa, imparare ad usare, configurare e personalizzare a diversi livelli 3DHOP è alla portata anche di personale non esperto sui temi della grafica 3D. Questo permette ad utenti con esperienza diversa (utilizzatori finali, sviluppatori di pagine Web, programmatori un diverso accesso al sistema. 3DHOP è scritto principalmente in JavaScript ed è basato sulla libreria SpiderGL, che a sua volta poggia sulla componente WebGL di HTML5. Ciò permette di gestire il rendering di modelli 3D su tutti i più comuni browser Web e senza richiedere l’uso di plugin. In questo articolo presentiamo le capacità e le caratteristiche della piattaforma 3DHOP, utilizzando diversi esempi pratici d’uso.

  5. Successful vectorization - reactor physics Monte Carlo code

    International Nuclear Information System (INIS)

    Martin, W.R.

    1989-01-01

    Most particle transport Monte Carlo codes in use today are based on the ''history-based'' algorithm, wherein one particle history at a time is simulated. Unfortunately, the ''history-based'' approach (present in all Monte Carlo codes until recent years) is inherently scalar and cannot be vectorized. In particular, the history-based algorithm cannot take advantage of vector architectures, which characterize the largest and fastest computers at the current time, vector supercomputers such as the Cray X/MP or IBM 3090/600. However, substantial progress has been made in recent years in developing and implementing a vectorized Monte Carlo algorithm. This algorithm follows portions of many particle histories at the same time and forms the basis for all successful vectorized Monte Carlo codes that are in use today. This paper describes the basic vectorized algorithm along with descriptions of several variations that have been developed by different researchers for specific applications. These applications have been mainly in the areas of neutron transport in nuclear reactor and shielding analysis and photon transport in fusion plasmas. The relative merits of the various approach schemes will be discussed and the present status of known vectorization efforts will be summarized along with available timing results, including results from the successful vectorization of 3-D general geometry, continuous energy Monte Carlo. (orig.)

  6. Etnoarcheologia dei paesaggi alpini di alta quota nelle Alpi occidentali: un bilancio preliminare / Ethnoarchaeology of Western Alpine upland landscapes: preliminary results

    Directory of Open Access Journals (Sweden)

    Francesco Carrer

    2015-12-01

    Full Text Available Lo studio dell’interazione tra gruppi umani e ambiente montano è centrale nell’attuale ricerca archeologica. L’etnoarcheologia contribuisce analizzando questa interazione nei contesti moderni e contemporanei, con lo scopo di creare modelli analogici per interpretare il passato e di comprendere più a fondo le strategie umane storiche e attuali. Il progetto EthWAL (Etnoarcheologia dei paesaggi alpini di alta quota nelle Alpi occidentali, nato nel 2013, si pone come punto di riferimento per lo studio delle attività umane nelle alte quote alpine in epoca moderna e contemporanea. È un progetto multidisciplinare (unisce i metodi archeologici a quelli etnografici e storiografici, alle analisi spaziali e alle analisi dei suoli e multiscalare (dalla piccola alla grande scala. Particolare attenzione è data alle capanne pastorali tradizionali. I risultati di questo progetto saranno utili all’archeologia e permetteranno la valorizzazione delle caratteristiche culturali dei paesaggi di alta montagna. The study of the interaction between human groups and mountain environment is crucial for archaeological research. Ethnoarchaeology contributes the analysis of this interaction in modern and contemporary contexts, aimed at creating analogical models for interpreting the past and understanding human strategies in historical and modern periods. The EthWAL project (Ethnoarchaeology of Western Alpine upland Landscapes, started in 2013, and aims to be a reference for the study of human activities in the alpine uplands during the modern and contemporary age. This is a multidisciplinary (associating archaeological methods to ethnography, historiography, spatial analysis and soil analysis and multiscalar project (small to large scale. Specific attention is given to traditional pastoral huts. The results of this project will be useful for archaeology and contribute to the management of cultural heritage in high altitude landscapes.

  7. L’intermodalità a supporto della riduzione dell’impatto ambientale dei trasporti: il caso dell’interporto quadrante Europa di Verona

    OpenAIRE

    Chimenti, Matteo; Dal Dosso, Michele

    2015-01-01

    Il presente paper si pone l’obiettivo di analizzare l’impatto delle “esternalità” dei trasporti sull’ambiente e sulla società. Nello specifico l’analisi verterà sul sistema interportuale italiano, quale strumento strategico per incrementare la mobilità sostenibile del futuro. Lo studio si concentrerà dapprima su di una panoramica del disegno dell’interportualità italiana per poi focalizzarsi sull’Interporto Quadrante Europa di Verona, che diverrà il case study del presente paper. Tale s...

  8. An assessment of econometric models applied to fossil fuel power generation; Un'analisi critica dell'applicazione dei modelli econometrici alla generazione termoelettrica

    Energy Technology Data Exchange (ETDEWEB)

    Gracceva, F.; Quercioli, R. [ENEA, Funzione Centrale Studi, Centro Ricerche Casaccia, Rome (Italy)

    2001-07-01

    The main purpose of this report is to provide a general view of those studies, in which the econometric approach is applied to the selection of fuel in fossil fired power generation, focusing the attention to the key role played by the fuel prices. The report consists of a methodological analysis and a survey of the studies available in literature. The methodological analysis allows to assess the adequateness of the econometric approach, in the electrical power utilities policy. With this purpose, the fundamentals of microeconomics, which are the basis of the econometric models, are pointed out and discussed, and then the hypotheses, which are needed to be assumed for complying the economic theory, are verified in their actual implementation in the power generation sector. The survey of the available studies provides a detailed description of the Translog and Logit models, and the results achieved with their application. From these results, the estimated models show to fit the data with good approximation, a certain degree of interfuel substitution and a meaningful reaction to prices on demand side. [Italian] In questo rapporto viene tracciato un quadro generale degli studi che utilizzano modelli econometrici per analizzare la scelta dei combustibili nella termogenerazione, con particoalre attenzione al ruolo svolto dal prezzo dei combustibili. La trattazione si compone di un'analisi di tipo metodologico e di una rassegna della letteratura. L'analisi metodologica consente di valutare l'adeguatezza dell'approccio econometrico nell'analisi del comportamento delle imprese di generazione elettrica. A tal fine vengono esplicitati e discussi i fondamenti microeconomici su cui poggiano i modelli econometrici, e viene verificata la sussistenza, nel settore termoelettrico, delle ipotesi che e' necessario assumere per soddisfare la teoria economica. La rassegna fornisce invece una descrizione dei modelli translog e logit lineare, ed un

  9. Verifica dell'appropriatezza dei ricoveri chirurgici secondo lo strumento RL-PVACE: valutazione economica e organizzativa nell'Azienda Ospedaliera G. Salvini

    Directory of Open Access Journals (Sweden)

    R. Barni

    2003-05-01

    Full Text Available

    Obiettivi: analizzare con lo strumento RL-PVACE l’appropriatezza dei ricoveri ordinari esitati in DRG chirurgici ad alto rischio di inappropriatezza; individuare e valutare economicamente i cambiamenti organizzativi necessari per raggiungere il livello di appropriatezza della circolare regionale 39/SAN.

    Metodi: il disegno dello studio è longitudinale e retrospettivo. È stata analizzata la sola giornata di ammissione di tutti i casi ordinari dimessi nel primo semestre dell’anno 2001, con esclusione dei casi 0- 1 giorno, ed esitati in DRG chirurgici che presentavano una quota di ricoveri ordinari, valutabili con RLPVA, superiore alla soglia di ammissibilità definita nel ddg n° 20180 (2002. I DRG così selezionati sono stati in ordine decrescente di numerosità: 119, 162, 55, 158, 222, 160, 267, 232, 270, 262, 40. Utilizzando i dati della contabilità analitica e ipotizzando lo spostamento in 1^ giornata o in day hospital dei ricoveri ordinari, è stato calcolato il punto di pareggio mediante la break-even analysis.

    Risultati: i dati presentati sono relativi a 845 cartelle cliniche corrispondenti ai DRG selezionati nei Presidi di Garbagnate e Bollate. È stato rilevato un livello assistenziale appropriato nel 38,3% dei casi mentre solo il 3,8% delle ammissioni si è rilevata tempestiva (appropriatezza complessiva 40,9%. Il criterio più adottato per l’attribuzione dell’appropriatezza del livello assistenziale è stato K3 (58,3%, seguito da L4 (20%, K1 (7%; meno frequenti i criteri J6 (3,4%, L3 (3,4%, J6 (3,4%, J4 (2,8%. Gli override sono stati attivati in una quota minoritaria di casi (2,1%. Dal punto di vista economico risulta relativamente conveniente il ricorso alla modalità del “one day surgery”.

    Conclusioni: l’utilizzo del protocollo RL-PVACE è risultato agevole (basso ricorso agli override. Il livello di appropriatezza raggiunto è in

  10. L'area faunistica del camoscio appenninico (Rupicapra pyrenaica ornata di Lama dei Peligni. Evoluzione del nucleo e problemi gestionali

    Directory of Open Access Journals (Sweden)

    L. Gentile

    2003-10-01

    Full Text Available L'Area Faunistica del Camoscio appenninico di Lama dei Peligni (CH nel Parco Nazionale della Majella è stata istituita nel 1990 con lo scopo principale di fungere da serbatoio di animali da utilizzare per operazioni di rinforzo della popolazione di Camosci in natura. Inoltre è stata ed è un notevole strumento per sensibilizzare la popolazione ed il pubblico alla conservazione della specie nonché una forte attrazione turistica per l'intera Valle dell'Aventino nel Parco Nazionale della Majella. L'Area Faunistica è ubicata nei pressi del centro abitato di Lama dei Peligni (CH sul versante Orientale della Majella ad un'altitudine che va dai 750 agli 850 m s.l.m. ed ha un'astensione complessiva di 4,2 ettari. Nel corso degli anni è stato necessario suddividere il recinto in 4 subrecinti per poter disporre di spazi separati utili per la gestione sanitaria del nucleo di animali ospitati. Inizialmente la responsabilità tecnica amministrativa è stata curata dal Parco Nazionale d'Abruzzo in collaborazione con il WWF Italia, successivamente è stata curata dalla Riserva Regionale "Majella Orientale" per passare dal 2000 all'Ente Parco Nazionale della Majella. L'area faunistica di Lama dei Peligni è stata attivata con l'immissione di un maschio prelevato in natura dalla popolazione della Val di Rose nel Parco Nazionale d'Abruzzo, Lazio e Molise e 5 femmine provenienti dal'Area Faunistica di Bisegna nel medesimo Parco. Nel periodo dal 1990 al 2002 sono nati 37 camosci e ne sono deceduti 20. Inoltre si sono verificati 14 rientri di animali provenienti dalla popolazione in natura e dall'Area Faunistica sono stati reimmessi 25 capi sul massiccio della Majella. L'Area di Lama dei Peligni ha consentito l'attivazione di un'ulteriore Area Faunistica nel Parco Nazionale del Gran Sasso Monti della Laga fornendo 1 femmina. Lo scopo principale del presente lavoro è di analizzare criticamente i dati raccolti in un database e di individuare un protocollo di

  11. Monte Carlo strategies in scientific computing

    CERN Document Server

    Liu, Jun S

    2008-01-01

    This paperback edition is a reprint of the 2001 Springer edition This book provides a self-contained and up-to-date treatment of the Monte Carlo method and develops a common framework under which various Monte Carlo techniques can be "standardized" and compared Given the interdisciplinary nature of the topics and a moderate prerequisite for the reader, this book should be of interest to a broad audience of quantitative researchers such as computational biologists, computer scientists, econometricians, engineers, probabilists, and statisticians It can also be used as the textbook for a graduate-level course on Monte Carlo methods Many problems discussed in the alter chapters can be potential thesis topics for masters’ or PhD students in statistics or computer science departments Jun Liu is Professor of Statistics at Harvard University, with a courtesy Professor appointment at Harvard Biostatistics Department Professor Liu was the recipient of the 2002 COPSS Presidents' Award, the most prestigious one for sta...

  12. Random Numbers and Monte Carlo Methods

    Science.gov (United States)

    Scherer, Philipp O. J.

    Many-body problems often involve the calculation of integrals of very high dimension which cannot be treated by standard methods. For the calculation of thermodynamic averages Monte Carlo methods are very useful which sample the integration volume at randomly chosen points. After summarizing some basic statistics, we discuss algorithms for the generation of pseudo-random numbers with given probability distribution which are essential for all Monte Carlo methods. We show how the efficiency of Monte Carlo integration can be improved by sampling preferentially the important configurations. Finally the famous Metropolis algorithm is applied to classical many-particle systems. Computer experiments visualize the central limit theorem and apply the Metropolis method to the traveling salesman problem.

  13. Off-diagonal expansion quantum Monte Carlo.

    Science.gov (United States)

    Albash, Tameem; Wagenbreth, Gene; Hen, Itay

    2017-12-01

    We propose a Monte Carlo algorithm designed to simulate quantum as well as classical systems at equilibrium, bridging the algorithmic gap between quantum and classical thermal simulation algorithms. The method is based on a decomposition of the quantum partition function that can be viewed as a series expansion about its classical part. We argue that the algorithm not only provides a theoretical advancement in the field of quantum Monte Carlo simulations, but is optimally suited to tackle quantum many-body systems that exhibit a range of behaviors from "fully quantum" to "fully classical," in contrast to many existing methods. We demonstrate the advantages, sometimes by orders of magnitude, of the technique by comparing it against existing state-of-the-art schemes such as path integral quantum Monte Carlo and stochastic series expansion. We also illustrate how our method allows for the unification of quantum and classical thermal parallel tempering techniques into a single algorithm and discuss its practical significance.

  14. Reflections on early Monte Carlo calculations

    International Nuclear Information System (INIS)

    Spanier, J.

    1992-01-01

    Monte Carlo methods for solving various particle transport problems developed in parallel with the evolution of increasingly sophisticated computer programs implementing diffusion theory and low-order moments calculations. In these early years, Monte Carlo calculations and high-order approximations to the transport equation were seen as too expensive to use routinely for nuclear design but served as invaluable aids and supplements to design with less expensive tools. The earliest Monte Carlo programs were quite literal; i.e., neutron and other particle random walk histories were simulated by sampling from the probability laws inherent in the physical system without distoration. Use of such analogue sampling schemes resulted in a good deal of time being spent in examining the possibility of lowering the statistical uncertainties in the sample estimates by replacing simple, and intuitively obvious, random variables by those with identical means but lower variances

  15. Monte Carlo simulation of Markov unreliability models

    International Nuclear Information System (INIS)

    Lewis, E.E.; Boehm, F.

    1984-01-01

    A Monte Carlo method is formulated for the evaluation of the unrealibility of complex systems with known component failure and repair rates. The formulation is in terms of a Markov process allowing dependences between components to be modeled and computational efficiencies to be achieved in the Monte Carlo simulation. Two variance reduction techniques, forced transition and failure biasing, are employed to increase computational efficiency of the random walk procedure. For an example problem these result in improved computational efficiency by more than three orders of magnitudes over analog Monte Carlo. The method is generalized to treat problems with distributed failure and repair rate data, and a batching technique is introduced and shown to result in substantial increases in computational efficiency for an example problem. A method for separating the variance due to the data uncertainty from that due to the finite number of random walks is presented. (orig.)

  16. Shell model the Monte Carlo way

    International Nuclear Information System (INIS)

    Ormand, W.E.

    1995-01-01

    The formalism for the auxiliary-field Monte Carlo approach to the nuclear shell model is presented. The method is based on a linearization of the two-body part of the Hamiltonian in an imaginary-time propagator using the Hubbard-Stratonovich transformation. The foundation of the method, as applied to the nuclear many-body problem, is discussed. Topics presented in detail include: (1) the density-density formulation of the method, (2) computation of the overlaps, (3) the sign of the Monte Carlo weight function, (4) techniques for performing Monte Carlo sampling, and (5) the reconstruction of response functions from an imaginary-time auto-correlation function using MaxEnt techniques. Results obtained using schematic interactions, which have no sign problem, are presented to demonstrate the feasibility of the method, while an extrapolation method for realistic Hamiltonians is presented. In addition, applications at finite temperature are outlined

  17. Shell model the Monte Carlo way

    Energy Technology Data Exchange (ETDEWEB)

    Ormand, W.E.

    1995-03-01

    The formalism for the auxiliary-field Monte Carlo approach to the nuclear shell model is presented. The method is based on a linearization of the two-body part of the Hamiltonian in an imaginary-time propagator using the Hubbard-Stratonovich transformation. The foundation of the method, as applied to the nuclear many-body problem, is discussed. Topics presented in detail include: (1) the density-density formulation of the method, (2) computation of the overlaps, (3) the sign of the Monte Carlo weight function, (4) techniques for performing Monte Carlo sampling, and (5) the reconstruction of response functions from an imaginary-time auto-correlation function using MaxEnt techniques. Results obtained using schematic interactions, which have no sign problem, are presented to demonstrate the feasibility of the method, while an extrapolation method for realistic Hamiltonians is presented. In addition, applications at finite temperature are outlined.

  18. SPQR: a Monte Carlo reactor kinetics code

    International Nuclear Information System (INIS)

    Cramer, S.N.; Dodds, H.L.

    1980-02-01

    The SPQR Monte Carlo code has been developed to analyze fast reactor core accident problems where conventional methods are considered inadequate. The code is based on the adiabatic approximation of the quasi-static method. This initial version contains no automatic material motion or feedback. An existing Monte Carlo code is used to calculate the shape functions and the integral quantities needed in the kinetics module. Several sample problems have been devised and analyzed. Due to the large statistical uncertainty associated with the calculation of reactivity in accident simulations, the results, especially at later times, differ greatly from deterministic methods. It was also found that in large uncoupled systems, the Monte Carlo method has difficulty in handling asymmetric perturbations

  19. Current and future applications of Monte Carlo

    International Nuclear Information System (INIS)

    Zaidi, H.

    2003-01-01

    Full text: The use of radionuclides in medicine has a long history and encompasses a large area of applications including diagnosis and radiation treatment of cancer patients using either external or radionuclide radiotherapy. The 'Monte Carlo method'describes a very broad area of science, in which many processes, physical systems, and phenomena are simulated by statistical methods employing random numbers. The general idea of Monte Carlo analysis is to create a model, which is as similar as possible to the real physical system of interest, and to create interactions within that system based on known probabilities of occurrence, with random sampling of the probability density functions (pdfs). As the number of individual events (called 'histories') is increased, the quality of the reported average behavior of the system improves, meaning that the statistical uncertainty decreases. The use of the Monte Carlo method to simulate radiation transport has become the most accurate means of predicting absorbed dose distributions and other quantities of interest in the radiation treatment of cancer patients using either external or radionuclide radiotherapy. The same trend has occurred for the estimation of the absorbed dose in diagnostic procedures using radionuclides as well as the assessment of image quality and quantitative accuracy of radionuclide imaging. As a consequence of this generalized use, many questions are being raised primarily about the need and potential of Monte Carlo techniques, but also about how accurate it really is, what would it take to apply it clinically and make it available widely to the nuclear medicine community at large. Many of these questions will be answered when Monte Carlo techniques are implemented and used for more routine calculations and for in-depth investigations. In this paper, the conceptual role of the Monte Carlo method is briefly introduced and followed by a survey of its different applications in diagnostic and therapeutic

  20. Monte Carlo method for array criticality calculations

    International Nuclear Information System (INIS)

    Dickinson, D.; Whitesides, G.E.

    1976-01-01

    The Monte Carlo method for solving neutron transport problems consists of mathematically tracing paths of individual neutrons collision by collision until they are lost by absorption or leakage. The fate of the neutron after each collision is determined by the probability distribution functions that are formed from the neutron cross-section data. These distributions are sampled statistically to establish the successive steps in the neutron's path. The resulting data, accumulated from following a large number of batches, are analyzed to give estimates of k/sub eff/ and other collision-related quantities. The use of electronic computers to produce the simulated neutron histories, initiated at Los Alamos Scientific Laboratory, made the use of the Monte Carlo method practical for many applications. In analog Monte Carlo simulation, the calculation follows the physical events of neutron scattering, absorption, and leakage. To increase calculational efficiency, modifications such as the use of statistical weights are introduced. The Monte Carlo method permits the use of a three-dimensional geometry description and a detailed cross-section representation. Some of the problems in using the method are the selection of the spatial distribution for the initial batch, the preparation of the geometry description for complex units, and the calculation of error estimates for region-dependent quantities such as fluxes. The Monte Carlo method is especially appropriate for criticality safety calculations since it permits an accurate representation of interacting units of fissile material. Dissimilar units, units of complex shape, moderators between units, and reflected arrays may be calculated. Monte Carlo results must be correlated with relevant experimental data, and caution must be used to ensure that a representative set of neutron histories is produced

  1. Monte Carlo simulation applied to alpha spectrometry

    International Nuclear Information System (INIS)

    Baccouche, S.; Gharbi, F.; Trabelsi, A.

    2007-01-01

    Alpha particle spectrometry is a widely-used analytical method, in particular when we deal with pure alpha emitting radionuclides. Monte Carlo simulation is an adequate tool to investigate the influence of various phenomena on this analytical method. We performed an investigation of those phenomena using the simulation code GEANT of CERN. The results concerning the geometrical detection efficiency in different measurement geometries agree with analytical calculations. This work confirms that Monte Carlo simulation of solid angle of detection is a very useful tool to determine with very good accuracy the detection efficiency.

  2. Simplified monte carlo simulation for Beijing spectrometer

    International Nuclear Information System (INIS)

    Wang Taijie; Wang Shuqin; Yan Wuguang; Huang Yinzhi; Huang Deqiang; Lang Pengfei

    1986-01-01

    The Monte Carlo method based on the functionization of the performance of detectors and the transformation of values of kinematical variables into ''measured'' ones by means of smearing has been used to program the Monte Carlo simulation of the performance of the Beijing Spectrometer (BES) in FORTRAN language named BESMC. It can be used to investigate the multiplicity, the particle type, and the distribution of four-momentum of the final states of electron-positron collision, and also the response of the BES to these final states. Thus, it provides a measure to examine whether the overall design of the BES is reasonable and to decide the physical topics of the BES

  3. Self-learning Monte Carlo (dynamical biasing)

    International Nuclear Information System (INIS)

    Matthes, W.

    1981-01-01

    In many applications the histories of a normal Monte Carlo game rarely reach the target region. An approximate knowledge of the importance (with respect to the target) may be used to guide the particles more frequently into the target region. A Monte Carlo method is presented in which each history contributes to update the importance field such that eventually most target histories are sampled. It is a self-learning method in the sense that the procedure itself: (a) learns which histories are important (reach the target) and increases their probability; (b) reduces the probabilities of unimportant histories; (c) concentrates gradually on the more important target histories. (U.K.)

  4. Burnup calculations using Monte Carlo method

    International Nuclear Information System (INIS)

    Ghosh, Biplab; Degweker, S.B.

    2009-01-01

    In the recent years, interest in burnup calculations using Monte Carlo methods has gained momentum. Previous burn up codes have used multigroup transport theory based calculations followed by diffusion theory based core calculations for the neutronic portion of codes. The transport theory methods invariably make approximations with regard to treatment of the energy and angle variables involved in scattering, besides approximations related to geometry simplification. Cell homogenisation to produce diffusion, theory parameters adds to these approximations. Moreover, while diffusion theory works for most reactors, it does not produce accurate results in systems that have strong gradients, strong absorbers or large voids. Also, diffusion theory codes are geometry limited (rectangular, hexagonal, cylindrical, and spherical coordinates). Monte Carlo methods are ideal to solve very heterogeneous reactors and/or lattices/assemblies in which considerable burnable poisons are used. The key feature of this approach is that Monte Carlo methods permit essentially 'exact' modeling of all geometrical detail, without resort to ene and spatial homogenization of neutron cross sections. Monte Carlo method would also be better for in Accelerator Driven Systems (ADS) which could have strong gradients due to the external source and a sub-critical assembly. To meet the demand for an accurate burnup code, we have developed a Monte Carlo burnup calculation code system in which Monte Carlo neutron transport code is coupled with a versatile code (McBurn) for calculating the buildup and decay of nuclides in nuclear materials. McBurn is developed from scratch by the authors. In this article we will discuss our effort in developing the continuous energy Monte Carlo burn-up code, McBurn. McBurn is intended for entire reactor core as well as for unit cells and assemblies. Generally, McBurn can do burnup of any geometrical system which can be handled by the underlying Monte Carlo transport code

  5. Improvements for Monte Carlo burnup calculation

    Energy Technology Data Exchange (ETDEWEB)

    Shenglong, Q.; Dong, Y.; Danrong, S.; Wei, L., E-mail: qiangshenglong@tsinghua.org.cn, E-mail: d.yao@npic.ac.cn, E-mail: songdr@npic.ac.cn, E-mail: luwei@npic.ac.cn [Nuclear Power Inst. of China, Cheng Du, Si Chuan (China)

    2015-07-01

    Monte Carlo burnup calculation is development trend of reactor physics, there would be a lot of work to be done for engineering applications. Based on Monte Carlo burnup code MOI, non-fuel burnup calculation methods and critical search suggestions will be mentioned in this paper. For non-fuel burnup, mixed burnup mode will improve the accuracy of burnup calculation and efficiency. For critical search of control rod position, a new method called ABN based on ABA which used by MC21 will be proposed for the first time in this paper. (author)

  6. A keff calculation method by Monte Carlo

    International Nuclear Information System (INIS)

    Shen, H; Wang, K.

    2008-01-01

    The effective multiplication factor (k eff ) is defined as the ratio between the number of neutrons in successive generations, which definition is adopted by most Monte Carlo codes (e.g. MCNP). Also, it can be thought of as the ratio of the generation rate of neutrons by the sum of the leakage rate and the absorption rate, which should exclude the effect of the neutron reaction such as (n, 2n) and (n, 3n). This article discusses the Monte Carlo method for k eff calculation based on the second definition. A new code has been developed and the results are presented. (author)

  7. Monte Carlo electron/photon transport

    International Nuclear Information System (INIS)

    Mack, J.M.; Morel, J.E.; Hughes, H.G.

    1985-01-01

    A review of nonplasma coupled electron/photon transport using Monte Carlo method is presented. Remarks are mainly restricted to linerarized formalisms at electron energies from 1 keV to 1000 MeV. Applications involving pulse-height estimation, transport in external magnetic fields, and optical Cerenkov production are discussed to underscore the importance of this branch of computational physics. Advances in electron multigroup cross-section generation is reported, and its impact on future code development assessed. Progress toward the transformation of MCNP into a generalized neutral/charged-particle Monte Carlo code is described. 48 refs

  8. Monte Carlo simulation of neutron scattering instruments

    International Nuclear Information System (INIS)

    Seeger, P.A.

    1995-01-01

    A library of Monte Carlo subroutines has been developed for the purpose of design of neutron scattering instruments. Using small-angle scattering as an example, the philosophy and structure of the library are described and the programs are used to compare instruments at continuous wave (CW) and long-pulse spallation source (LPSS) neutron facilities. The Monte Carlo results give a count-rate gain of a factor between 2 and 4 using time-of-flight analysis. This is comparable to scaling arguments based on the ratio of wavelength bandwidth to resolution width

  9. Monte Carlo applications to radiation shielding problems

    International Nuclear Information System (INIS)

    Subbaiah, K.V.

    2009-01-01

    Monte Carlo methods are a class of computational algorithms that rely on repeated random sampling of physical and mathematical systems to compute their results. However, basic concepts of MC are both simple and straightforward and can be learned by using a personal computer. Uses of Monte Carlo methods require large amounts of random numbers, and it was their use that spurred the development of pseudorandom number generators, which were far quicker to use than the tables of random numbers which had been previously used for statistical sampling. In Monte Carlo simulation of radiation transport, the history (track) of a particle is viewed as a random sequence of free flights that end with an interaction event where the particle changes its direction of movement, loses energy and, occasionally, produces secondary particles. The Monte Carlo simulation of a given experimental arrangement (e.g., an electron beam, coming from an accelerator and impinging on a water phantom) consists of the numerical generation of random histories. To simulate these histories we need an interaction model, i.e., a set of differential cross sections (DCS) for the relevant interaction mechanisms. The DCSs determine the probability distribution functions (pdf) of the random variables that characterize a track; 1) free path between successive interaction events, 2) type of interaction taking place and 3) energy loss and angular deflection in a particular event (and initial state of emitted secondary particles, if any). Once these pdfs are known, random histories can be generated by using appropriate sampling methods. If the number of generated histories is large enough, quantitative information on the transport process may be obtained by simply averaging over the simulated histories. The Monte Carlo method yields the same information as the solution of the Boltzmann transport equation, with the same interaction model, but is easier to implement. In particular, the simulation of radiation

  10. Simulation of transport equations with Monte Carlo

    International Nuclear Information System (INIS)

    Matthes, W.

    1975-09-01

    The main purpose of the report is to explain the relation between the transport equation and the Monte Carlo game used for its solution. The introduction of artificial particles carrying a weight provides one with high flexibility in constructing many different games for the solution of the same equation. This flexibility opens a way to construct a Monte Carlo game for the solution of the adjoint transport equation. Emphasis is laid mostly on giving a clear understanding of what to do and not on the details of how to do a specific game

  11. Monte Carlo dose distributions for radiosurgery

    International Nuclear Information System (INIS)

    Perucha, M.; Leal, A.; Rincon, M.; Carrasco, E.

    2001-01-01

    The precision of Radiosurgery Treatment planning systems is limited by the approximations of their algorithms and by their dosimetrical input data. This fact is especially important in small fields. However, the Monte Carlo methods is an accurate alternative as it considers every aspect of particle transport. In this work an acoustic neurinoma is studied by comparing the dose distribution of both a planning system and Monte Carlo. Relative shifts have been measured and furthermore, Dose-Volume Histograms have been calculated for target and adjacent organs at risk. (orig.)

  12. Fast sequential Monte Carlo methods for counting and optimization

    CERN Document Server

    Rubinstein, Reuven Y; Vaisman, Radislav

    2013-01-01

    A comprehensive account of the theory and application of Monte Carlo methods Based on years of research in efficient Monte Carlo methods for estimation of rare-event probabilities, counting problems, and combinatorial optimization, Fast Sequential Monte Carlo Methods for Counting and Optimization is a complete illustration of fast sequential Monte Carlo techniques. The book provides an accessible overview of current work in the field of Monte Carlo methods, specifically sequential Monte Carlo techniques, for solving abstract counting and optimization problems. Written by authorities in the

  13. Specialized Monte Carlo codes versus general-purpose Monte Carlo codes

    International Nuclear Information System (INIS)

    Moskvin, Vadim; DesRosiers, Colleen; Papiez, Lech; Lu, Xiaoyi

    2002-01-01

    The possibilities of Monte Carlo modeling for dose calculations and optimization treatment are quite limited in radiation oncology applications. The main reason is that the Monte Carlo technique for dose calculations is time consuming while treatment planning may require hundreds of possible cases of dose simulations to be evaluated for dose optimization. The second reason is that general-purpose codes widely used in practice, require an experienced user to customize them for calculations. This paper discusses the concept of Monte Carlo code design that can avoid the main problems that are preventing wide spread use of this simulation technique in medical physics. (authors)

  14. On the use of stochastic approximation Monte Carlo for Monte Carlo integration

    KAUST Repository

    Liang, Faming

    2009-03-01

    The stochastic approximation Monte Carlo (SAMC) algorithm has recently been proposed as a dynamic optimization algorithm in the literature. In this paper, we show in theory that the samples generated by SAMC can be used for Monte Carlo integration via a dynamically weighted estimator by calling some results from the literature of nonhomogeneous Markov chains. Our numerical results indicate that SAMC can yield significant savings over conventional Monte Carlo algorithms, such as the Metropolis-Hastings algorithm, for the problems for which the energy landscape is rugged. © 2008 Elsevier B.V. All rights reserved.

  15. Keratoconus diagnosis using Corvis ST measured biomechanical parameters

    Directory of Open Access Journals (Sweden)

    Roghiyeh Elham

    2017-09-01

    Conclusions: The A1T seems a valuable parameter in the diagnosis of keratoconic eyes. It showed excellent diagnostic ability even when controlled for CCT. None of the parameters were reliable index for keratoconus staging.

  16. Marsiglia, una terra a Sud di nessun nord. La presenza dei gruppi criminali nella ville méditerranée

    Directory of Open Access Journals (Sweden)

    Rosaria Anghelone

    2015-07-01

    Full Text Available Il lavoro si propone di affrontare la presenza dei gruppi criminali a Marsiglia, dagli anni delle grandi migrazioni di inizio secolo scorso, in cui il porto Mediterraneo è stato il cuore di scambi commerciali e culturali, sino agli anni recenti, in cui la città ha tirato fuori, costruendola, la sua faccia europea. Lungo tutto quest’arco temporale, confronteremo le vicende e le figure che emergeranno nel contesto, che si determinerà di fase in fase, con la concettualizzazione del fenomeno mafioso italiano; quest’ultima, come cartina al tornasole, ci permetterà di cogliere le caratteristiche del milieu marsigliese, i suoi tratti specifici e quelli che lo accomunano, sia nella logica che nell’esplicazione del suo potere, alla mafia. Marsiglia, incarnando tutte le contraddizioni delle terre del Sud, farà da palcoscenico per la riflessione sui fattori che favoriscono la nascita e rafforzano la crescita dei gruppi criminali. L’intento, oltre l’analisi del singolo caso marsigliese, è, altresì, quello di constatare quanto la Francia sia ancora impreparata in tema di contrasto alla criminalità organizzata di stampo mafioso, sottovalutandone gli effetti, e quanto, ancor di più, sia ormai imprescindibile un intervento europeo su questo versante, tendente all’armonizzazione delle legislazioni nazionali.

  17. Energy model in regional energy system; Modello computazionale dei flussi di enegia, massa e materia in un sistema energetico regionale per la valutazione delle emissioni

    Energy Technology Data Exchange (ETDEWEB)

    Mura, P.G.; Baccoli, R.; Carlini, U.; Innamorati, R.; Mariotti, S. [Cagliari Univ., Cagliari (Italy). Sezione Fisica Tecnica ed Energetica Facolta' d' Ingegneria

    2005-09-01

    In this report is presented a computational model for analysis of energy, materials and mass flux in a complex energy system, at regional scale level. Specifically is described a calculation model of electric power generation for emission forecasting of CO{sub 2}, SO{sub x}, NO{sub x}, particulate matter, ashes, limestone, chalks. [Italian] Dopo aver ricordato che nel campo della Fisica Tecnica ambientale acquista sempre piu' importanza l'analisi dei processi che interessano l'ambiente esterno in stretto rapporto con i processi di conversione ed uso dell'energia e con le condizioni di benessere nell'ambiente interno, in questa memoria viene presentato un modello computazionale per l'analisi dei flussi di energia, massa e materia che hanno luogo in un sistema energetico complesso esteso al territorio di una regione. In particolare viene descritto il modello di calcolo del sottosistema di generazione elettrica finalizzato alla previsione delle emissioni nocive riversate nell'ambiente naturale quali CO{sub 2}, SO{sub x}, NO{sub x}, polveri, ceneri, calcare, gessi.

  18. La restituzione virtuale dell’architettura antica come strumento di ricerca e comunicazione dei beni culturali: ricerca estetica e gestione delle fonti

    Directory of Open Access Journals (Sweden)

    Stefano Borghini

    2011-12-01

    Full Text Available Raffaello Sanzio intuì per primo che il mondo antico, come lo vedevano i suoi occhi, non era che l’eco sbiadita di quella ricchezza che pur doveva caratterizzarne l’esperienza artistica. Oggi la tecnologia permette di realizzare il sogno di Raffaello e di restituire le immagini delle antiche architetture, rivoluzionando la percezione del patrimonio culturale da parte del pubblico moderno. La nostra esperienza decennale nel settore della comunicazione del bene culturale ha consentito di confrontarci con diversi casi: dalla Domus Aurea, all'Ara Pacis; dai filmati divulgativi agli applicativi pensati per le postazioni fisse dei musei, fino alla creazione di software per la gestione dei dati degli scavi archeologici. Sempre ponendo al centro di ogni lavoro i cardini del nostro modo di fare ricerca: l'attenzione al linguaggio, quale strumento di comprensione estetica, e la gestione informatizzata delle fonti, come apparato di studio e metodo di validazione scientifica delle ricostruzioni.[L’impostazione del saggio è comune ai due autori. In particolare, però, Stefano Borghini ha curato il paragrafo “Considerazioni generali”, mentre Raffaele Carlani “Alcune esperienze”].

  19. Economies of scale in the Italian waste collection sector; Analisi dei rendimenti di scala per il servizio di igiene urbana in Italia

    Energy Technology Data Exchange (ETDEWEB)

    Antonioli, B. [Ferrara Univ., Ferrara (Italy). Facolta' di Economia; Universita' della Svizzera Italiana, Facolta' di Economia, Lugano (Switzerland); Fazioli, R. [Ferrara Univ., Ferrara (Italy). Facolta' di Economia; Filippini, M. [Universita' della Svizzera Italiana, Facolta' di Economia, Lugano (Switzerland); Politecnico Federale, Zurich(Switzerland)

    2000-06-01

    The purpose of this study is to analyse the cost structure of a sample of Italian waste collection firms in order to assess economies of scale and density so to estimate economic rationality of competition in the waste collection sector. A trans log cost function was estimated using panel data for a sample of 30 firms of waste collection and disposal operating at provincial level over the period 1991-1995. The results indicate the existence of economies of density and scale for most output levels. The empirical evidence suggests that franchised monopolies, rather than side-by-side competition, is the most efficient form of production organisation in the waste collection sector. [Italian] L'obiettivo del presente studio e' l'analisi della struttura dei costi di un campione di imprese pubbliche italiane operanti nel settore dell'igiene urbana, allo scopo di valutare la presenza di economie di scala e di densita' e, conseguentemente, l'opportunita' di introdurre concorrenza nel settore. A tal fine, e' stata stimata una funzione di costo translogaritmica per un campione di 30 imprese pubbliche di raccolta e smaltimento dei rifiuti, operanti a livello provinciale, per il periodo 1991-1995. I risultati indicano la presenza di economie di scala e di monopolies, piuttosto che la side-by-side competition, costituiscono la forma gestionale maggiormente efficiente per il settore.

  20. Ambiente sonoro e percezione di alcune caratteristiche dei parchi urbani: analisi e modelli - Sonic environment and perception of some features of urban parks: analysis and models

    Directory of Open Access Journals (Sweden)

    Giovanni Brambilla

    2016-07-01

    Full Text Available Sui dati raccolti in otto parchi urbani, comprendenti alcuni parametri acustici e le valutazioni dei fruitori sulla qualità complessiva del parco percepita e di alcune sue caratteristiche, si è proceduto a diverse analisi statistiche. L’analisi delle componenti principali e quella cluster gerarchica sui dati acustici ha fornito una classificazione in tre gruppi risultata poco sovrapponibile a quella ottenuta con l’analisi cluster e delle corrispondenze multiple condotta sui responsi soggettivi. La discrepanza, confermata anche da alcuni modelli di regressione logistica multinomiale, evidenzia l’influenza di altri fattori non acustici sulla percezione dell’ambiente dei parchi urbani. ------ Different statistical analyses have been carried out on data collected in eight urban parks, including some acoustical parameters and the appraisals of park visitors on the perceived overall quality of the park and some of its features. Principal component analysis and hierarchical cluster one on the acoustic data have identified three groups. This classification poorly overlaps that obtained by hierarchical cluster analysis and multiple correspondence one performed on subjective appraisals data. The difference, confirmed also by models developed by multinomial logistic regression, points out the influence of other non-acoustic factors on the perception of the urban parks environment.

  1. Parallel processing Monte Carlo radiation transport codes

    International Nuclear Information System (INIS)

    McKinney, G.W.

    1994-01-01

    Issues related to distributed-memory multiprocessing as applied to Monte Carlo radiation transport are discussed. Measurements of communication overhead are presented for the radiation transport code MCNP which employs the communication software package PVM, and average efficiency curves are provided for a homogeneous virtual machine

  2. Monte Carlo determination of heteroepitaxial misfit structures

    DEFF Research Database (Denmark)

    Baker, J.; Lindgård, Per-Anker

    1996-01-01

    We use Monte Carlo simulations to determine the structure of KBr overlayers on a NaCl(001) substrate, a system with large (17%) heteroepitaxial misfit. The equilibrium relaxation structure is determined for films of 2-6 ML, for which extensive helium-atom scattering data exist for comparison...

  3. The Monte Carlo applied for calculation dose

    International Nuclear Information System (INIS)

    Peixoto, J.E.

    1988-01-01

    The Monte Carlo method is showed for the calculation of absorbed dose. The trajectory of the photon is traced simulating sucessive interaction between the photon and the substance that consist the human body simulator. The energy deposition in each interaction of the simulator organ or tissue per photon is also calculated. (C.G.C.) [pt

  4. Monte Carlo code for neutron radiography

    International Nuclear Information System (INIS)

    Milczarek, Jacek J.; Trzcinski, Andrzej; El-Ghany El Abd, Abd; Czachor, Andrzej

    2005-01-01

    The concise Monte Carlo code, MSX, for simulation of neutron radiography images of non-uniform objects is presented. The possibility of modeling the images of objects with continuous spatial distribution of specific isotopes is included. The code can be used for assessment of the scattered neutron component in neutron radiograms

  5. Monte Carlo code for neutron radiography

    Energy Technology Data Exchange (ETDEWEB)

    Milczarek, Jacek J. [Institute of Atomic Energy, Swierk, 05-400 Otwock (Poland)]. E-mail: jjmilcz@cyf.gov.pl; Trzcinski, Andrzej [Institute for Nuclear Studies, Swierk, 05-400 Otwock (Poland); El-Ghany El Abd, Abd [Institute of Atomic Energy, Swierk, 05-400 Otwock (Poland); Nuclear Research Center, PC 13759, Cairo (Egypt); Czachor, Andrzej [Institute of Atomic Energy, Swierk, 05-400 Otwock (Poland)

    2005-04-21

    The concise Monte Carlo code, MSX, for simulation of neutron radiography images of non-uniform objects is presented. The possibility of modeling the images of objects with continuous spatial distribution of specific isotopes is included. The code can be used for assessment of the scattered neutron component in neutron radiograms.

  6. Monte Carlo method in neutron activation analysis

    International Nuclear Information System (INIS)

    Majerle, M.; Krasa, A.; Svoboda, O.; Wagner, V.; Adam, J.; Peetermans, S.; Slama, O.; Stegajlov, V.I.; Tsupko-Sitnikov, V.M.

    2009-01-01

    Neutron activation detectors are a useful technique for the neutron flux measurements in spallation experiments. The study of the usefulness and the accuracy of this method at similar experiments was performed with the help of Monte Carlo codes MCNPX and FLUKA

  7. Atomistic Monte Carlo simulation of lipid membranes

    DEFF Research Database (Denmark)

    Wüstner, Daniel; Sklenar, Heinz

    2014-01-01

    Biological membranes are complex assemblies of many different molecules of which analysis demands a variety of experimental and computational approaches. In this article, we explain challenges and advantages of atomistic Monte Carlo (MC) simulation of lipid membranes. We provide an introduction...... of local-move MC methods in combination with molecular dynamics simulations, for example, for studying multi-component lipid membranes containing cholesterol....

  8. Computer system for Monte Carlo experimentation

    International Nuclear Information System (INIS)

    Grier, D.A.

    1986-01-01

    A new computer system for Monte Carlo Experimentation is presented. The new system speeds and simplifies the process of coding and preparing a Monte Carlo Experiment; it also encourages the proper design of Monte Carlo Experiments, and the careful analysis of the experimental results. A new functional language is the core of this system. Monte Carlo Experiments, and their experimental designs, are programmed in this new language; those programs are compiled into Fortran output. The Fortran output is then compiled and executed. The experimental results are analyzed with a standard statistics package such as Si, Isp, or Minitab or with a user-supplied program. Both the experimental results and the experimental design may be directly loaded into the workspace of those packages. The new functional language frees programmers from many of the details of programming an experiment. Experimental designs such as factorial, fractional factorial, or latin square are easily described by the control structures and expressions of the language. Specific mathematical modes are generated by the routines of the language

  9. Scalable Domain Decomposed Monte Carlo Particle Transport

    Energy Technology Data Exchange (ETDEWEB)

    O' Brien, Matthew Joseph [Univ. of California, Davis, CA (United States)

    2013-12-05

    In this dissertation, we present the parallel algorithms necessary to run domain decomposed Monte Carlo particle transport on large numbers of processors (millions of processors). Previous algorithms were not scalable, and the parallel overhead became more computationally costly than the numerical simulation.

  10. Monte Carlo methods beyond detailed balance

    NARCIS (Netherlands)

    Schram, Raoul D.; Barkema, Gerard T.|info:eu-repo/dai/nl/101275080

    2015-01-01

    Monte Carlo algorithms are nearly always based on the concept of detailed balance and ergodicity. In this paper we focus on algorithms that do not satisfy detailed balance. We introduce a general method for designing non-detailed balance algorithms, starting from a conventional algorithm satisfying

  11. Monte Carlo studies of ZEPLIN III

    CERN Document Server

    Dawson, J; Davidge, D C R; Gillespie, J R; Howard, A S; Jones, W G; Joshi, M; Lebedenko, V N; Sumner, T J; Quenby, J J

    2002-01-01

    A Monte Carlo simulation of a two-phase xenon dark matter detector, ZEPLIN III, has been achieved. Results from the analysis of a simulated data set are presented, showing primary and secondary signal distributions from low energy gamma ray events.

  12. Biases in Monte Carlo eigenvalue calculations

    Energy Technology Data Exchange (ETDEWEB)

    Gelbard, E.M.

    1992-12-01

    The Monte Carlo method has been used for many years to analyze the neutronics of nuclear reactors. In fact, as the power of computers has increased the importance of Monte Carlo in neutronics has also increased, until today this method plays a central role in reactor analysis and design. Monte Carlo is used in neutronics for two somewhat different purposes, i.e., (a) to compute the distribution of neutrons in a given medium when the neutron source-density is specified, and (b) to compute the neutron distribution in a self-sustaining chain reaction, in which case the source is determined as the eigenvector of a certain linear operator. In (b), then, the source is not given, but must be computed. In the first case (the ``fixed-source`` case) the Monte Carlo calculation is unbiased. That is to say that, if the calculation is repeated (``replicated``) over and over, with independent random number sequences for each replica, then averages over all replicas will approach the correct neutron distribution as the number of replicas goes to infinity. Unfortunately, the computation is not unbiased in the second case, which we discuss here.

  13. Biases in Monte Carlo eigenvalue calculations

    Energy Technology Data Exchange (ETDEWEB)

    Gelbard, E.M.

    1992-01-01

    The Monte Carlo method has been used for many years to analyze the neutronics of nuclear reactors. In fact, as the power of computers has increased the importance of Monte Carlo in neutronics has also increased, until today this method plays a central role in reactor analysis and design. Monte Carlo is used in neutronics for two somewhat different purposes, i.e., (a) to compute the distribution of neutrons in a given medium when the neutron source-density is specified, and (b) to compute the neutron distribution in a self-sustaining chain reaction, in which case the source is determined as the eigenvector of a certain linear operator. In (b), then, the source is not given, but must be computed. In the first case (the fixed-source'' case) the Monte Carlo calculation is unbiased. That is to say that, if the calculation is repeated ( replicated'') over and over, with independent random number sequences for each replica, then averages over all replicas will approach the correct neutron distribution as the number of replicas goes to infinity. Unfortunately, the computation is not unbiased in the second case, which we discuss here.

  14. Dynamic bounds coupled with Monte Carlo simulations

    Energy Technology Data Exchange (ETDEWEB)

    Rajabalinejad, M., E-mail: M.Rajabalinejad@tudelft.n [Faculty of Civil Engineering, Delft University of Technology, Delft (Netherlands); Meester, L.E. [Delft Institute of Applied Mathematics, Delft University of Technology, Delft (Netherlands); Gelder, P.H.A.J.M. van; Vrijling, J.K. [Faculty of Civil Engineering, Delft University of Technology, Delft (Netherlands)

    2011-02-15

    For the reliability analysis of engineering structures a variety of methods is known, of which Monte Carlo (MC) simulation is widely considered to be among the most robust and most generally applicable. To reduce simulation cost of the MC method, variance reduction methods are applied. This paper describes a method to reduce the simulation cost even further, while retaining the accuracy of Monte Carlo, by taking into account widely present monotonicity. For models exhibiting monotonic (decreasing or increasing) behavior, dynamic bounds (DB) are defined, which in a coupled Monte Carlo simulation are updated dynamically, resulting in a failure probability estimate, as well as a strict (non-probabilistic) upper and lower bounds. Accurate results are obtained at a much lower cost than an equivalent ordinary Monte Carlo simulation. In a two-dimensional and a four-dimensional numerical example, the cost reduction factors are 130 and 9, respectively, where the relative error is smaller than 5%. At higher accuracy levels, this factor increases, though this effect is expected to be smaller with increasing dimension. To show the application of DB method to real world problems, it is applied to a complex finite element model of a flood wall in New Orleans.

  15. Dynamic bounds coupled with Monte Carlo simulations

    NARCIS (Netherlands)

    Rajabali Nejad, Mohammadreza; Meester, L.E.; van Gelder, P.H.A.J.M.; Vrijling, J.K.

    2011-01-01

    For the reliability analysis of engineering structures a variety of methods is known, of which Monte Carlo (MC) simulation is widely considered to be among the most robust and most generally applicable. To reduce simulation cost of the MC method, variance reduction methods are applied. This paper

  16. Design and analysis of Monte Carlo experiments

    NARCIS (Netherlands)

    Kleijnen, Jack P.C.; Gentle, J.E.; Haerdle, W.; Mori, Y.

    2012-01-01

    By definition, computer simulation or Monte Carlo models are not solved by mathematical analysis (such as differential calculus), but are used for numerical experimentation. The goal of these experiments is to answer questions about the real world; i.e., the experimenters may use their models to

  17. Some problems on Monte Carlo method development

    International Nuclear Information System (INIS)

    Pei Lucheng

    1992-01-01

    This is a short paper on some problems of Monte Carlo method development. The content consists of deep-penetration problems, unbounded estimate problems, limitation of Mdtropolis' method, dependency problem in Metropolis' method, random error interference problems and random equations, intellectualisation and vectorization problems of general software

  18. Monte Carlo simulations in theoretical physic

    International Nuclear Information System (INIS)

    Billoire, A.

    1991-01-01

    After a presentation of the MONTE CARLO method principle, the method is applied, first to the critical exponents calculations in the three dimensions ISING model, and secondly to the discrete quantum chromodynamic with calculation times in function of computer power. 28 refs., 4 tabs

  19. Monte Carlo method for random surfaces

    International Nuclear Information System (INIS)

    Berg, B.

    1985-01-01

    Previously two of the authors proposed a Monte Carlo method for sampling statistical ensembles of random walks and surfaces with a Boltzmann probabilistic weight. In the present paper we work out the details for several models of random surfaces, defined on d-dimensional hypercubic lattices. (orig.)

  20. Monte Carlo simulation of the microcanonical ensemble

    International Nuclear Information System (INIS)

    Creutz, M.

    1984-01-01

    We consider simulating statistical systems with a random walk on a constant energy surface. This combines features of deterministic molecular dynamics techniques and conventional Monte Carlo simulations. For discrete systems the method can be programmed to run an order of magnitude faster than other approaches. It does not require high quality random numbers and may also be useful for nonequilibrium studies. 10 references

  1. Variance Reduction Techniques in Monte Carlo Methods

    NARCIS (Netherlands)

    Kleijnen, Jack P.C.; Ridder, A.A.N.; Rubinstein, R.Y.

    2010-01-01

    Monte Carlo methods are simulation algorithms to estimate a numerical quantity in a statistical model of a real system. These algorithms are executed by computer programs. Variance reduction techniques (VRT) are needed, even though computer speed has been increasing dramatically, ever since the

  2. Coded aperture optimization using Monte Carlo simulations

    International Nuclear Information System (INIS)

    Martineau, A.; Rocchisani, J.M.; Moretti, J.L.

    2010-01-01

    Coded apertures using Uniformly Redundant Arrays (URA) have been unsuccessfully evaluated for two-dimensional and three-dimensional imaging in Nuclear Medicine. The images reconstructed from coded projections contain artifacts and suffer from poor spatial resolution in the longitudinal direction. We introduce a Maximum-Likelihood Expectation-Maximization (MLEM) algorithm for three-dimensional coded aperture imaging which uses a projection matrix calculated by Monte Carlo simulations. The aim of the algorithm is to reduce artifacts and improve the three-dimensional spatial resolution in the reconstructed images. Firstly, we present the validation of GATE (Geant4 Application for Emission Tomography) for Monte Carlo simulations of a coded mask installed on a clinical gamma camera. The coded mask modelling was validated by comparison between experimental and simulated data in terms of energy spectra, sensitivity and spatial resolution. In the second part of the study, we use the validated model to calculate the projection matrix with Monte Carlo simulations. A three-dimensional thyroid phantom study was performed to compare the performance of the three-dimensional MLEM reconstruction with conventional correlation method. The results indicate that the artifacts are reduced and three-dimensional spatial resolution is improved with the Monte Carlo-based MLEM reconstruction.

  3. Biases in Monte Carlo eigenvalue calculations

    International Nuclear Information System (INIS)

    Gelbard, E.M.

    1992-01-01

    The Monte Carlo method has been used for many years to analyze the neutronics of nuclear reactors. In fact, as the power of computers has increased the importance of Monte Carlo in neutronics has also increased, until today this method plays a central role in reactor analysis and design. Monte Carlo is used in neutronics for two somewhat different purposes, i.e., (a) to compute the distribution of neutrons in a given medium when the neutron source-density is specified, and (b) to compute the neutron distribution in a self-sustaining chain reaction, in which case the source is determined as the eigenvector of a certain linear operator. In (b), then, the source is not given, but must be computed. In the first case (the ''fixed-source'' case) the Monte Carlo calculation is unbiased. That is to say that, if the calculation is repeated (''replicated'') over and over, with independent random number sequences for each replica, then averages over all replicas will approach the correct neutron distribution as the number of replicas goes to infinity. Unfortunately, the computation is not unbiased in the second case, which we discuss here

  4. Monte Carlo studies of uranium calorimetry

    International Nuclear Information System (INIS)

    Brau, J.; Hargis, H.J.; Gabriel, T.A.; Bishop, B.L.

    1985-01-01

    Detailed Monte Carlo calculations of uranium calorimetry are presented which reveal a significant difference in the responses of liquid argon and plastic scintillator in uranium calorimeters. Due to saturation effects, neutrons from the uranium are found to contribute only weakly to the liquid argon signal. Electromagnetic sampling inefficiencies are significant and contribute substantially to compensation in both systems. 17 references

  5. Uncertainty analysis in Monte Carlo criticality computations

    International Nuclear Information System (INIS)

    Qi Ao

    2011-01-01

    Highlights: ► Two types of uncertainty methods for k eff Monte Carlo computations are examined. ► Sampling method has the least restrictions on perturbation but computing resources. ► Analytical method is limited to small perturbation on material properties. ► Practicality relies on efficiency, multiparameter applicability and data availability. - Abstract: Uncertainty analysis is imperative for nuclear criticality risk assessments when using Monte Carlo neutron transport methods to predict the effective neutron multiplication factor (k eff ) for fissionable material systems. For the validation of Monte Carlo codes for criticality computations against benchmark experiments, code accuracy and precision are measured by both the computational bias and uncertainty in the bias. The uncertainty in the bias accounts for known or quantified experimental, computational and model uncertainties. For the application of Monte Carlo codes for criticality analysis of fissionable material systems, an administrative margin of subcriticality must be imposed to provide additional assurance of subcriticality for any unknown or unquantified uncertainties. Because of a substantial impact of the administrative margin of subcriticality on economics and safety of nuclear fuel cycle operations, recently increasing interests in reducing the administrative margin of subcriticality make the uncertainty analysis in criticality safety computations more risk-significant. This paper provides an overview of two most popular k eff uncertainty analysis methods for Monte Carlo criticality computations: (1) sampling-based methods, and (2) analytical methods. Examples are given to demonstrate their usage in the k eff uncertainty analysis due to uncertainties in both neutronic and non-neutronic parameters of fissionable material systems.

  6. Pore-scale uncertainty quantification with multilevel Monte Carlo

    KAUST Repository

    Icardi, Matteo; Hoel, Haakon; Long, Quan; Tempone, Raul

    2014-01-01

    . Since there are no generic ways to parametrize the randomness in the porescale structures, Monte Carlo techniques are the most accessible to compute statistics. We propose a multilevel Monte Carlo (MLMC) technique to reduce the computational cost

  7. Prospect on general software of Monte Carlo method

    International Nuclear Information System (INIS)

    Pei Lucheng

    1992-01-01

    This is a short paper on the prospect of Monte Carlo general software. The content consists of cluster sampling method, zero variance technique, self-improved method, and vectorized Monte Carlo method

  8. Bayesian phylogeny analysis via stochastic approximation Monte Carlo

    KAUST Repository

    Cheon, Sooyoung; Liang, Faming

    2009-01-01

    in simulating from the posterior distribution of phylogenetic trees, rendering the inference ineffective. In this paper, we apply an advanced Monte Carlo algorithm, the stochastic approximation Monte Carlo algorithm, to Bayesian phylogeny analysis. Our method

  9. Applications of Monte Carlo method in Medical Physics

    International Nuclear Information System (INIS)

    Diez Rios, A.; Labajos, M.

    1989-01-01

    The basic ideas of Monte Carlo techniques are presented. Random numbers and their generation by congruential methods, which underlie Monte Carlo calculations are shown. Monte Carlo techniques to solve integrals are discussed. The evaluation of a simple monodimensional integral with a known answer, by means of two different Monte Carlo approaches are discussed. The basic principles to simualate on a computer photon histories reduce variance and the current applications in Medical Physics are commented. (Author)

  10. Monte Carlo computation in the applied research of nuclear technology

    International Nuclear Information System (INIS)

    Xu Shuyan; Liu Baojie; Li Qin

    2007-01-01

    This article briefly introduces Monte Carlo Methods and their properties. It narrates the Monte Carlo methods with emphasis in their applications to several domains of nuclear technology. Monte Carlo simulation methods and several commonly used computer software to implement them are also introduced. The proposed methods are demonstrated by a real example. (authors)

  11. Teoria dell'elettromagnetismo fenomeni e leggi fondamentali : energia dei campi e delle distribuzioni di carica, applicazioni di meccanica analitica e statistica, teoria della relatività, emissione e propagazione di onde elettromagnetiche

    CERN Document Server

    Tenaglia, Livio

    1956-01-01

    Leggi fondamentali dell'elettromagnetismo ; le equazioni di Lagrange, di Hamilton e di Jacobi, il principio di Fermat ; applicazioni di meccanica analitica all'elettromagnetismo ; teoria statica dell'irraggiamento ; fondamenti di teoria della relatività ; propagazione delle onde elettromagnetiche proprietà elementari dei conduttori ; emissione di onde elettromagnetiche ; richiami analitici ; unità di misura per le grandezze del campo elettromagnetico.

  12. CP Violation and K0 decays revelation: study and simulation of neutral Trigger in NA48 experiment -- Violazione di CP e rivelazione dei decadimenti del K0: studio e simulazione del Trigger neutro nell'esperimento NA48

    CERN Document Server

    Calzolari, Federico

    2007-01-01

    At the INFN laboratory in Pisa I have prepared my dissertation, which essentially concerned Montecarlo simulation of subnuclear particles decays and investigation of low-noise electronic devices for analyzing high-frequency signals. The team-work was part of NA48/EPSI experiment jointly carried out with European Organization for Nuclear Research CERN, Geneva. ----- Nell'ambito dell'esperimento NA48 in corso al CERN Super Proton Syncrothon (SPS) finalizzato a misurare la violazione diretta di CP in sistemi di particelle K0 attraverso il doppio rapporto R = [N(K_L->Pi0Pi0)]/[N(K_S->Pi0Pi0)] / [N(K_L->Pi+Pi-)]/[N(K_S->Pi+Pi-)] = 1 - 6 Re(e1/e) con una precisione di Re(e1/e) superiore a 2 * 10^-4, il lavoro di tesi si propone di effettuare una simulazione per la rivelazione dei decadimenti neutri dei K0 ed una successiva analisi dei dati raffrontando l'evento fisico generato con metodo Montecarlo e quello ricostruito. Per la misura di e1/e occorre isolare tra i vari modi di decadimento dei K quelli K_S->Pi0Pi0, K...

  13. La riforma della società per azioni nel pensiero di Sylos Labini e dei suoi contemporanei (Corporate Law Reform in Sylos Labini’s Thought and His Contemporaries’

    Directory of Open Access Journals (Sweden)

    Mario Stella Richter

    2016-06-01

    Full Text Available he article describes corporate law in Italy in the Postwar period, as viewed by Paolo Sylos Labini and Tullio Ascarelli. This is the revised version of a speech given at the conference "Paolo Sylos Labini e la politica delle riforme", held at Sapienza University of Rome on 04 December 2015, organized by the Accademia dei Lincei and Economia civile.

  14. Evoluzione dei sistemi GNSS

    Directory of Open Access Journals (Sweden)

    Gianluca Pititto

    2010-03-01

    Full Text Available Evolution of GNSS systems With this article GEOmedia is starting a review on the latest updates concerning GNSS technology. Since the first GPS satellites, the evolution of GNSS sector witnessed the grow of other constellations: GLONASS, Beidou (Compass and Galileo. The development of positioning techniques even brought to the creation of specific Augmentation Systems, capable of the enhancement of the localization signals (GBAS and SBAS. The aim of this review is to provide a general-to-particular knowledge of all the positiong and augmentation systems, from a historical point of view to real applications.

  15. Le emozioni dei soccorritori

    Directory of Open Access Journals (Sweden)

    Maria Teresa Fenoglio

    2010-03-01

    Full Text Available Rescuers, be they volunteers or professionals, face human physic and psychological suffering everyday. The high exposition to potential traumatic events arouses strong emotions in the operator. This article gives specific attention to rescuer’s emotion reactions. It explores theories about operator’s potential pathological answers and then it promotes a broader concept of “rescuers emotions”: this concept points out the inevitability of emotions and their potential positive function. Emotions, in fact, are integral part of rescue. Operator training is very important to improve their ability in regulation and management of emotions. This kind of training is important to improve rescuers and victims well-being.

  16. Apertura dei lavori

    Directory of Open Access Journals (Sweden)

    Giovanni Renga

    2003-05-01

    Full Text Available

    Questa sessione apre i lavori dell’VIII Conferenza di Sanità Pubblica della nostra Società. Il programma che vi è stato presentato, la sede in cui si svolge, la qualità e la dimensione della vostra partecipazione riconfermano la validità di una formula che si è andata consolidando nel tempo e rappresenta ormai, insieme al Congresso Nazionale biennale, il fiore all’occhiello della ricchissima attività convegnistica della SItI.

    Si conferma anche la straordinaria continuità e coerenza della nostra società scientifica nell’interpretare, a livelli qualitativi sempre più elevati, la propria missione di individuazione, approfondimento e disseminazione della conoscenza necessaria per migliorare l’azione di Sanità Pubblica nel nostro Paese.

    La sessione testimonia questa attenzione! Con il tema della SARS, la Relazione di Pietro Crovari dà conto delle linee di comportamento dell’apparato di sanità pubblica nell’affrontare un problema che ha scosso l’opinione pubblica mondiale risvegliando anche nei paesi più progrediti antiche paure e arcaici pregiudizi; che ha provocato contraccolpi enormi in ambito commerciale ed economico; che ha richiamato l’attenzione su regole e precauzioni tanto scontate da risultare poi in pratica quasi inapplicate. La risposta italiana è stata corretta, impostata sulle conoscenze scientifiche adottate con pragmatico buon senso. Una autorevole presenza della cultura igienistica nelle sedi decisionali ci consente anche di guardare con serenità ai possibili rischi ancora ipotizzabili.

    La partecipazione alla Comunità Europea e l’adesione ai suoi principi e le sue regole stanno producendo una serie di cambiamenti che arriveranno a incidere anche sui nostri modelli di prevenzione. La Relazione di Vittorio Carreri fornirà il punto di vista di uno sperimentato ed attento conoscitore della materia riguardo agli innumerevoli problemi già aperti e su quelli ancora incombenti sul sistema di sanità pubblica per effetto sia della globalizzazione che della devolution e sulla capacità di risposta dalle amministrazioni regionali.

  17. Architetture dei paesaggi commestibili

    Directory of Open Access Journals (Sweden)

    Claudio Zanirato

    2015-12-01

    Full Text Available In recent times different activities have started to promote the exploitation of typical products contributing to safeguard economic and territorial orders and local productions in the era of globalization. These activities are inevitably inserted into the global economy, of the great distribution and e-commerce, losing the connection with the territory. An ideal and necessary process should try to restore the relationship between productive area and commerce toward a sort of self- consumption, that aims at reducing the movements of goods reestablishing a landscape congruence. The examples from Expo Milano 2015 and F.I.C.O. in Bologna have suggest an intervention to Olbia that should combine the island and landscape dimension with the enogastronomic one.

  18. cognitio dei et nostri

    African Journals Online (AJOL)

    Dr. Wilhelm H. Neuser DD, emeritus, Buchenstraße 15, D-48346 Ostbevern,. Deutschland. ... Calvin, J., Institutes of the Christian Religion 1536, transl. by F.L. Battles, Grand. Rapids, 1986, 15-18. ..... und Leben, und es gibt keine andere Weis-.

  19. Monte Carlo-based tail exponent estimator

    Science.gov (United States)

    Barunik, Jozef; Vacha, Lukas

    2010-11-01

    In this paper we propose a new approach to estimation of the tail exponent in financial stock markets. We begin the study with the finite sample behavior of the Hill estimator under α-stable distributions. Using large Monte Carlo simulations, we show that the Hill estimator overestimates the true tail exponent and can hardly be used on samples with small length. Utilizing our results, we introduce a Monte Carlo-based method of estimation for the tail exponent. Our proposed method is not sensitive to the choice of tail size and works well also on small data samples. The new estimator also gives unbiased results with symmetrical confidence intervals. Finally, we demonstrate the power of our estimator on the international world stock market indices. On the two separate periods of 2002-2005 and 2006-2009, we estimate the tail exponent.

  20. No-compromise reptation quantum Monte Carlo

    International Nuclear Information System (INIS)

    Yuen, W K; Farrar, Thomas J; Rothstein, Stuart M

    2007-01-01

    Since its publication, the reptation quantum Monte Carlo algorithm of Baroni and Moroni (1999 Phys. Rev. Lett. 82 4745) has been applied to several important problems in physics, but its mathematical foundations are not well understood. We show that their algorithm is not of typical Metropolis-Hastings type, and we specify conditions required for the generated Markov chain to be stationary and to converge to the intended distribution. The time-step bias may add up, and in many applications it is only the middle of a reptile that is the most important. Therefore, we propose an alternative, 'no-compromise reptation quantum Monte Carlo' to stabilize the middle of the reptile. (fast track communication)

  1. Multilevel Monte Carlo Approaches for Numerical Homogenization

    KAUST Repository

    Efendiev, Yalchin R.

    2015-10-01

    In this article, we study the application of multilevel Monte Carlo (MLMC) approaches to numerical random homogenization. Our objective is to compute the expectation of some functionals of the homogenized coefficients, or of the homogenized solutions. This is accomplished within MLMC by considering different sizes of representative volumes (RVEs). Many inexpensive computations with the smallest RVE size are combined with fewer expensive computations performed on larger RVEs. Likewise, when it comes to homogenized solutions, different levels of coarse-grid meshes are used to solve the homogenized equation. We show that, by carefully selecting the number of realizations at each level, we can achieve a speed-up in the computations in comparison to a standard Monte Carlo method. Numerical results are presented for both one-dimensional and two-dimensional test-cases that illustrate the efficiency of the approach.

  2. Status of Monte Carlo at Los Alamos

    International Nuclear Information System (INIS)

    Thompson, W.L.; Cashwell, E.D.

    1980-01-01

    At Los Alamos the early work of Fermi, von Neumann, and Ulam has been developed and supplemented by many followers, notably Cashwell and Everett, and the main product today is the continuous-energy, general-purpose, generalized-geometry, time-dependent, coupled neutron-photon transport code called MCNP. The Los Alamos Monte Carlo research and development effort is concentrated in Group X-6. MCNP treats an arbitrary three-dimensional configuration of arbitrary materials in geometric cells bounded by first- and second-degree surfaces and some fourth-degree surfaces (elliptical tori). Monte Carlo has evolved into perhaps the main method for radiation transport calculations at Los Alamos. MCNP is used in every technical division at the Laboratory by over 130 users about 600 times a month accounting for nearly 200 hours of CDC-7600 time

  3. Monte Carlo simulations in skin radiotherapy

    International Nuclear Information System (INIS)

    Sarvari, A.; Jeraj, R.; Kron, T.

    2000-01-01

    The primary goal of this work was to develop a procedure for calculation the appropriate filter shape for a brachytherapy applicator used for skin radiotherapy. In the applicator a radioactive source is positioned close to the skin. Without a filter, the resultant dose distribution would be highly nonuniform.High uniformity is usually required however. This can be achieved using an appropriately shaped filter, which flattens the dose profile. Because of the complexity of the transport and geometry, Monte Carlo simulations had to be used. An 192 Ir high dose rate photon source was used. All necessary transport parameters were simulated with the MCNP4B Monte Carlo code. A highly efficient iterative procedure was developed, which enabled calculation of the optimal filter shape in only few iterations. The initially non-uniform dose distributions became uniform within a percent when applying the filter calculated by this procedure. (author)

  4. Monte Carlo simulations on SIMD computer architectures

    International Nuclear Information System (INIS)

    Burmester, C.P.; Gronsky, R.; Wille, L.T.

    1992-01-01

    In this paper algorithmic considerations regarding the implementation of various materials science applications of the Monte Carlo technique to single instruction multiple data (SIMD) computer architectures are presented. In particular, implementation of the Ising model with nearest, next nearest, and long range screened Coulomb interactions on the SIMD architecture MasPar MP-1 (DEC mpp-12000) series of massively parallel computers is demonstrated. Methods of code development which optimize processor array use and minimize inter-processor communication are presented including lattice partitioning and the use of processor array spanning tree structures for data reduction. Both geometric and algorithmic parallel approaches are utilized. Benchmarks in terms of Monte Carl updates per second for the MasPar architecture are presented and compared to values reported in the literature from comparable studies on other architectures

  5. Coevolution Based Adaptive Monte Carlo Localization (CEAMCL

    Directory of Open Access Journals (Sweden)

    Luo Ronghua

    2008-11-01

    Full Text Available An adaptive Monte Carlo localization algorithm based on coevolution mechanism of ecological species is proposed. Samples are clustered into species, each of which represents a hypothesis of the robot's pose. Since the coevolution between the species ensures that the multiple distinct hypotheses can be tracked stably, the problem of premature convergence when using MCL in highly symmetric environments can be solved. And the sample size can be adjusted adaptively over time according to the uncertainty of the robot's pose by using the population growth model. In addition, by using the crossover and mutation operators in evolutionary computation, intra-species evolution can drive the samples move towards the regions where the desired posterior density is large. So a small size of samples can represent the desired density well enough to make precise localization. The new algorithm is termed coevolution based adaptive Monte Carlo localization (CEAMCL. Experiments have been carried out to prove the efficiency of the new localization algorithm.

  6. Multilevel sequential Monte-Carlo samplers

    KAUST Repository

    Jasra, Ajay

    2016-01-01

    Multilevel Monte-Carlo methods provide a powerful computational technique for reducing the computational cost of estimating expectations for a given computational effort. They are particularly relevant for computational problems when approximate distributions are determined via a resolution parameter h, with h=0 giving the theoretical exact distribution (e.g. SDEs or inverse problems with PDEs). The method provides a benefit by coupling samples from successive resolutions, and estimating differences of successive expectations. We develop a methodology that brings Sequential Monte-Carlo (SMC) algorithms within the framework of the Multilevel idea, as SMC provides a natural set-up for coupling samples over different resolutions. We prove that the new algorithm indeed preserves the benefits of the multilevel principle, even if samples at all resolutions are now correlated.

  7. Monte Carlo simulation of gas Cerenkov detectors

    International Nuclear Information System (INIS)

    Mack, J.M.; Jain, M.; Jordan, T.M.

    1984-01-01

    Theoretical study of selected gamma-ray and electron diagnostic necessitates coupling Cerenkov radiation to electron/photon cascades. A Cerenkov production model and its incorporation into a general geometry Monte Carlo coupled electron/photon transport code is discussed. A special optical photon ray-trace is implemented using bulk optical properties assigned to each Monte Carlo zone. Good agreement exists between experimental and calculated Cerenkov data in the case of a carbon-dioxide gas Cerenkov detector experiment. Cerenkov production and threshold data are presented for a typical carbon-dioxide gas detector that converts a 16.7 MeV photon source to Cerenkov light, which is collected by optics and detected by a photomultiplier

  8. Hypothesis testing of scientific Monte Carlo calculations

    Science.gov (United States)

    Wallerberger, Markus; Gull, Emanuel

    2017-11-01

    The steadily increasing size of scientific Monte Carlo simulations and the desire for robust, correct, and reproducible results necessitates rigorous testing procedures for scientific simulations in order to detect numerical problems and programming bugs. However, the testing paradigms developed for deterministic algorithms have proven to be ill suited for stochastic algorithms. In this paper we demonstrate explicitly how the technique of statistical hypothesis testing, which is in wide use in other fields of science, can be used to devise automatic and reliable tests for Monte Carlo methods, and we show that these tests are able to detect some of the common problems encountered in stochastic scientific simulations. We argue that hypothesis testing should become part of the standard testing toolkit for scientific simulations.

  9. Multilevel sequential Monte-Carlo samplers

    KAUST Repository

    Jasra, Ajay

    2016-01-05

    Multilevel Monte-Carlo methods provide a powerful computational technique for reducing the computational cost of estimating expectations for a given computational effort. They are particularly relevant for computational problems when approximate distributions are determined via a resolution parameter h, with h=0 giving the theoretical exact distribution (e.g. SDEs or inverse problems with PDEs). The method provides a benefit by coupling samples from successive resolutions, and estimating differences of successive expectations. We develop a methodology that brings Sequential Monte-Carlo (SMC) algorithms within the framework of the Multilevel idea, as SMC provides a natural set-up for coupling samples over different resolutions. We prove that the new algorithm indeed preserves the benefits of the multilevel principle, even if samples at all resolutions are now correlated.

  10. Monte Carlo Simulation for Particle Detectors

    CERN Document Server

    Pia, Maria Grazia

    2012-01-01

    Monte Carlo simulation is an essential component of experimental particle physics in all the phases of its life-cycle: the investigation of the physics reach of detector concepts, the design of facilities and detectors, the development and optimization of data reconstruction software, the data analysis for the production of physics results. This note briefly outlines some research topics related to Monte Carlo simulation, that are relevant to future experimental perspectives in particle physics. The focus is on physics aspects: conceptual progress beyond current particle transport schemes, the incorporation of materials science knowledge relevant to novel detection technologies, functionality to model radiation damage, the capability for multi-scale simulation, quantitative validation and uncertainty quantification to determine the predictive power of simulation. The R&D on simulation for future detectors would profit from cooperation within various components of the particle physics community, and synerg...

  11. Status of Monte Carlo at Los Alamos

    International Nuclear Information System (INIS)

    Thompson, W.L.; Cashwell, E.D.; Godfrey, T.N.K.; Schrandt, R.G.; Deutsch, O.L.; Booth, T.E.

    1980-05-01

    Four papers were presented by Group X-6 on April 22, 1980, at the Oak Ridge Radiation Shielding Information Center (RSIC) Seminar-Workshop on Theory and Applications of Monte Carlo Methods. These papers are combined into one report for convenience and because they are related to each other. The first paper (by Thompson and Cashwell) is a general survey about X-6 and MCNP and is an introduction to the other three papers. It can also serve as a resume of X-6. The second paper (by Godfrey) explains some of the details of geometry specification in MCNP. The third paper (by Cashwell and Schrandt) illustrates calculating flux at a point with MCNP; in particular, the once-more-collided flux estimator is demonstrated. Finally, the fourth paper (by Thompson, Deutsch, and Booth) is a tutorial on some variance-reduction techniques. It should be required for a fledging Monte Carlo practitioner

  12. Fuel-cell technology for vehicular applications; L`introduzione delle pile a combustibile nel settore dei trasporti: proposte, standard e normative per sistemi di bordo ed impianti

    Energy Technology Data Exchange (ETDEWEB)

    Ciancia, A.; Pede, G.; Marmigi, R. [ENEA, Centro Ricerche Casaccia, Rome (Italy). Dip. Energia

    1998-12-31

    The fuel-cell technology applied to engines for vehicular applications grants broad margins of convenience over any known alternative engine for what concerns the compliance with any present and foreseeable environmental and energy saving regulations. On the other hand, the use of hydrogen produced on board from fuels or stored as a liquid or a gas, raises new problems from the point of view of safety regulations and standards both in the design and use of vehicles and in the fuel production and distribution. The present work is aimed at pointing out the above main safety problems, describes the technical-choices together with their technical grounds, in the framework of the italian and U E standards and regulations. The report is then made up of three parts. The initial section where the on board storage of the fuel from technical-economical point of view is discussed. with particular reference to the compressed hydrogen, the second describing the regulations and standards holding in the field of on board pressure equipment and reporting the ongoing ENEA`s activities in the field. The final part is devoted to the distribution and supply of the fuels to the fuel cell powered electric vehicles. [Italiano] La tecnologia delle celle a combustibile, impiegata nella realizzazione dei propulsori dei veicoli elettrici, conferisce ad essi ampi margini di vantaggio su ogni altro tipo di motorizzazione per quanto riguarda le attuali e prevedibili future normative ambientali e di risparmio energetico. Il presente rapporto si propone di evidenziare alcuni tra questi problemi ed esporre e motivare le soluzioni tecniche previste nell`ambito degli specifici programmi dell`ENEA, in un contesto normativo di riferimento nazionale e comunitario. Il rapporto si compone pertanto di tre parti: una parte iniziale dove e` affrontato dal punto di vista tecnico-economico il problema del trasporto del combustibile a bordo con particolare riferimento all`idrogeno compresso, una seconda in cui

  13. Topological zero modes in Monte Carlo simulations

    International Nuclear Information System (INIS)

    Dilger, H.

    1994-08-01

    We present an improvement of global Metropolis updating steps, the instanton hits, used in a hybrid Monte Carlo simulation of the two-flavor Schwinger model with staggered fermions. These hits are designed to change the topological sector of the gauge field. In order to match these hits to an unquenched simulation with pseudofermions, the approximate zero mode structure of the lattice Dirac operator has to be considered explicitly. (orig.)

  14. Handbook of Markov chain Monte Carlo

    CERN Document Server

    Brooks, Steve

    2011-01-01

    ""Handbook of Markov Chain Monte Carlo"" brings together the major advances that have occurred in recent years while incorporating enough introductory material for new users of MCMC. Along with thorough coverage of the theoretical foundations and algorithmic and computational methodology, this comprehensive handbook includes substantial realistic case studies from a variety of disciplines. These case studies demonstrate the application of MCMC methods and serve as a series of templates for the construction, implementation, and choice of MCMC methodology.

  15. The lund Monte Carlo for jet fragmentation

    International Nuclear Information System (INIS)

    Sjoestrand, T.

    1982-03-01

    We present a Monte Carlo program based on the Lund model for jet fragmentation. Quark, gluon, diquark and hadron jets are considered. Special emphasis is put on the fragmentation of colour singlet jet systems, for which energy, momentum and flavour are conserved explicitly. The model for decays of unstable particles, in particular the weak decay of heavy hadrons, is described. The central part of the paper is a detailed description on how to use the FORTRAN 77 program. (Author)

  16. Monte Carlo methods for preference learning

    DEFF Research Database (Denmark)

    Viappiani, P.

    2012-01-01

    Utility elicitation is an important component of many applications, such as decision support systems and recommender systems. Such systems query the users about their preferences and give recommendations based on the system’s belief about the utility function. Critical to these applications is th...... is the acquisition of prior distribution about the utility parameters and the possibility of real time Bayesian inference. In this paper we consider Monte Carlo methods for these problems....

  17. Monte Carlo methods for shield design calculations

    International Nuclear Information System (INIS)

    Grimstone, M.J.

    1974-01-01

    A suite of Monte Carlo codes is being developed for use on a routine basis in commercial reactor shield design. The methods adopted for this purpose include the modular construction of codes, simplified geometries, automatic variance reduction techniques, continuous energy treatment of cross section data, and albedo methods for streaming. Descriptions are given of the implementation of these methods and of their use in practical calculations. 26 references. (U.S.)

  18. General purpose code for Monte Carlo simulations

    International Nuclear Information System (INIS)

    Wilcke, W.W.

    1983-01-01

    A general-purpose computer called MONTHY has been written to perform Monte Carlo simulations of physical systems. To achieve a high degree of flexibility the code is organized like a general purpose computer, operating on a vector describing the time dependent state of the system under simulation. The instruction set of the computer is defined by the user and is therefore adaptable to the particular problem studied. The organization of MONTHY allows iterative and conditional execution of operations

  19. Autocorrelations in hybrid Monte Carlo simulations

    International Nuclear Information System (INIS)

    Schaefer, Stefan; Virotta, Francesco

    2010-11-01

    Simulations of QCD suffer from severe critical slowing down towards the continuum limit. This problem is known to be prominent in the topological charge, however, all observables are affected to various degree by these slow modes in the Monte Carlo evolution. We investigate the slowing down in high statistics simulations and propose a new error analysis method, which gives a realistic estimate of the contribution of the slow modes to the errors. (orig.)

  20. Introduction to the Monte Carlo methods

    International Nuclear Information System (INIS)

    Uzhinskij, V.V.

    1993-01-01

    Codes illustrating the use of Monte Carlo methods in high energy physics such as the inverse transformation method, the ejection method, the particle propagation through the nucleus, the particle interaction with the nucleus, etc. are presented. A set of useful algorithms of random number generators is given (the binomial distribution, the Poisson distribution, β-distribution, γ-distribution and normal distribution). 5 figs., 1 tab

  1. Sequential Monte Carlo with Highly Informative Observations

    OpenAIRE

    Del Moral, Pierre; Murray, Lawrence M.

    2014-01-01

    We propose sequential Monte Carlo (SMC) methods for sampling the posterior distribution of state-space models under highly informative observation regimes, a situation in which standard SMC methods can perform poorly. A special case is simulating bridges between given initial and final values. The basic idea is to introduce a schedule of intermediate weighting and resampling times between observation times, which guide particles towards the final state. This can always be done for continuous-...

  2. Monte Carlo codes use in neutron therapy

    International Nuclear Information System (INIS)

    Paquis, P.; Mokhtari, F.; Karamanoukian, D.; Pignol, J.P.; Cuendet, P.; Iborra, N.

    1998-01-01

    Monte Carlo calculation codes allow to study accurately all the parameters relevant to radiation effects, like the dose deposition or the type of microscopic interactions, through one by one particle transport simulation. These features are very useful for neutron irradiations, from device development up to dosimetry. This paper illustrates some applications of these codes in Neutron Capture Therapy and Neutron Capture Enhancement of fast neutrons irradiations. (authors)

  3. Quantum Monte Carlo calculations of light nuclei

    International Nuclear Information System (INIS)

    Pandharipande, V. R.

    1999-01-01

    Quantum Monte Carlo methods provide an essentially exact way to calculate various properties of nuclear bound, and low energy continuum states, from realistic models of nuclear interactions and currents. After a brief description of the methods and modern models of nuclear forces, we review the results obtained for all the bound, and some continuum states of up to eight nucleons. Various other applications of the methods are reviewed along with future prospects

  4. Monte-Carlo simulation of electromagnetic showers

    International Nuclear Information System (INIS)

    Amatuni, Ts.A.

    1984-01-01

    The universal ELSS-1 program for Monte Carlo simulation of high energy electromagnetic showers in homogeneous absorbers of arbitrary geometry is written. The major processes and effects of electron and photon interaction with matter, particularly the Landau-Pomeranchuk-Migdal effect, are taken into account in the simulation procedures. The simulation results are compared with experimental data. Some characteristics of shower detectors and electromagnetic showers for energies up 1 TeV are calculated

  5. Cost of splitting in Monte Carlo transport

    International Nuclear Information System (INIS)

    Everett, C.J.; Cashwell, E.D.

    1978-03-01

    In a simple transport problem designed to estimate transmission through a plane slab of x free paths by Monte Carlo methods, it is shown that m-splitting (m > or = 2) does not pay unless exp(x) > m(m + 3)/(m - 1). In such a case, the minimum total cost in terms of machine time is obtained as a function of m, and the optimal value of m is determined

  6. From Monte Carlo to Quantum Computation

    OpenAIRE

    Heinrich, Stefan

    2001-01-01

    Quantum computing was so far mainly concerned with discrete problems. Recently, E. Novak and the author studied quantum algorithms for high dimensional integration and dealt with the question, which advantages quantum computing can bring over classical deterministic or randomized methods for this type of problem. In this paper we give a short introduction to the basic ideas of quantum computing and survey recent results on high dimensional integration. We discuss connections to the Monte Carl...

  7. Monte Carlo simulation of Touschek effect

    Directory of Open Access Journals (Sweden)

    Aimin Xiao

    2010-07-01

    Full Text Available We present a Monte Carlo method implementation in the code elegant for simulating Touschek scattering effects in a linac beam. The local scattering rate and the distribution of scattered electrons can be obtained from the code either for a Gaussian-distributed beam or for a general beam whose distribution function is given. In addition, scattered electrons can be tracked through the beam line and the local beam-loss rate and beam halo information recorded.

  8. Monte Carlo method for neutron transport problems

    International Nuclear Information System (INIS)

    Asaoka, Takumi

    1977-01-01

    Some methods for decreasing variances in Monte Carlo neutron transport calculations are presented together with the results of sample calculations. A general purpose neutron transport Monte Carlo code ''MORSE'' was used for the purpose. The first method discussed in this report is the method of statistical estimation. As an example of this method, the application of the coarse-mesh rebalance acceleration method to the criticality calculation of a cylindrical fast reactor is presented. Effective multiplication factor and its standard deviation are presented as a function of the number of histories and comparisons are made between the coarse-mesh rebalance method and the standard method. Five-group neutron fluxes at core center are also compared with the result of S4 calculation. The second method is the method of correlated sampling. This method was applied to the perturbation calculation of control rod worths in a fast critical assembly (FCA-V-3) Two methods of sampling (similar flight paths and identical flight paths) are tested and compared with experimental results. For every cases the experimental value lies within the standard deviation of the Monte Carlo calculations. The third method is the importance sampling. In this report a biased selection of particle flight directions discussed. This method was applied to the flux calculation in a spherical fast neutron system surrounded by a 10.16 cm iron reflector. Result-direction biasing, path-length stretching, and no biasing are compared with S8 calculation. (Aoki, K.)

  9. Biased Monte Carlo optimization: the basic approach

    International Nuclear Information System (INIS)

    Campioni, Luca; Scardovelli, Ruben; Vestrucci, Paolo

    2005-01-01

    It is well-known that the Monte Carlo method is very successful in tackling several kinds of system simulations. It often happens that one has to deal with rare events, and the use of a variance reduction technique is almost mandatory, in order to have Monte Carlo efficient applications. The main issue associated with variance reduction techniques is related to the choice of the value of the biasing parameter. Actually, this task is typically left to the experience of the Monte Carlo user, who has to make many attempts before achieving an advantageous biasing. A valuable result is provided: a methodology and a practical rule addressed to establish an a priori guidance for the choice of the optimal value of the biasing parameter. This result, which has been obtained for a single component system, has the notable property of being valid for any multicomponent system. In particular, in this paper, the exponential and the uniform biases of exponentially distributed phenomena are investigated thoroughly

  10. Quantum Monte Carlo for vibrating molecules

    International Nuclear Information System (INIS)

    Brown, W.R.; Lawrence Berkeley National Lab., CA

    1996-08-01

    Quantum Monte Carlo (QMC) has successfully computed the total electronic energies of atoms and molecules. The main goal of this work is to use correlation function quantum Monte Carlo (CFQMC) to compute the vibrational state energies of molecules given a potential energy surface (PES). In CFQMC, an ensemble of random walkers simulate the diffusion and branching processes of the imaginary-time time dependent Schroedinger equation in order to evaluate the matrix elements. The program QMCVIB was written to perform multi-state VMC and CFQMC calculations and employed for several calculations of the H 2 O and C 3 vibrational states, using 7 PES's, 3 trial wavefunction forms, two methods of non-linear basis function parameter optimization, and on both serial and parallel computers. In order to construct accurate trial wavefunctions different wavefunctions forms were required for H 2 O and C 3 . In order to construct accurate trial wavefunctions for C 3 , the non-linear parameters were optimized with respect to the sum of the energies of several low-lying vibrational states. In order to stabilize the statistical error estimates for C 3 the Monte Carlo data was collected into blocks. Accurate vibrational state energies were computed using both serial and parallel QMCVIB programs. Comparison of vibrational state energies computed from the three C 3 PES's suggested that a non-linear equilibrium geometry PES is the most accurate and that discrete potential representations may be used to conveniently determine vibrational state energies

  11. Lattice gauge theories and Monte Carlo simulations

    International Nuclear Information System (INIS)

    Rebbi, C.

    1981-11-01

    After some preliminary considerations, the discussion of quantum gauge theories on a Euclidean lattice takes up the definition of Euclidean quantum theory and treatment of the continuum limit; analogy is made with statistical mechanics. Perturbative methods can produce useful results for strong or weak coupling. In the attempts to investigate the properties of the systems for intermediate coupling, numerical methods known as Monte Carlo simulations have proved valuable. The bulk of this paper illustrates the basic ideas underlying the Monte Carlo numerical techniques and the major results achieved with them according to the following program: Monte Carlo simulations (general theory, practical considerations), phase structure of Abelian and non-Abelian models, the observables (coefficient of the linear term in the potential between two static sources at large separation, mass of the lowest excited state with the quantum numbers of the vacuum (the so-called glueball), the potential between two static sources at very small distance, the critical temperature at which sources become deconfined), gauge fields coupled to basonic matter (Higgs) fields, and systems with fermions

  12. Generalized hybrid Monte Carlo - CMFD methods for fission source convergence

    International Nuclear Information System (INIS)

    Wolters, Emily R.; Larsen, Edward W.; Martin, William R.

    2011-01-01

    In this paper, we generalize the recently published 'CMFD-Accelerated Monte Carlo' method and present two new methods that reduce the statistical error in CMFD-Accelerated Monte Carlo. The CMFD-Accelerated Monte Carlo method uses Monte Carlo to estimate nonlinear functionals used in low-order CMFD equations for the eigenfunction and eigenvalue. The Monte Carlo fission source is then modified to match the resulting CMFD fission source in a 'feedback' procedure. The two proposed methods differ from CMFD-Accelerated Monte Carlo in the definition of the required nonlinear functionals, but they have identical CMFD equations. The proposed methods are compared with CMFD-Accelerated Monte Carlo on a high dominance ratio test problem. All hybrid methods converge the Monte Carlo fission source almost immediately, leading to a large reduction in the number of inactive cycles required. The proposed methods stabilize the fission source more efficiently than CMFD-Accelerated Monte Carlo, leading to a reduction in the number of active cycles required. Finally, as in CMFD-Accelerated Monte Carlo, the apparent variance of the eigenfunction is approximately equal to the real variance, so the real error is well-estimated from a single calculation. This is an advantage over standard Monte Carlo, in which the real error can be underestimated due to inter-cycle correlation. (author)

  13. Monte Carlo methods and models in finance and insurance

    CERN Document Server

    Korn, Ralf; Kroisandt, Gerald

    2010-01-01

    Offering a unique balance between applications and calculations, Monte Carlo Methods and Models in Finance and Insurance incorporates the application background of finance and insurance with the theory and applications of Monte Carlo methods. It presents recent methods and algorithms, including the multilevel Monte Carlo method, the statistical Romberg method, and the Heath-Platen estimator, as well as recent financial and actuarial models, such as the Cheyette and dynamic mortality models. The authors separately discuss Monte Carlo techniques, stochastic process basics, and the theoretical background and intuition behind financial and actuarial mathematics, before bringing the topics together to apply the Monte Carlo methods to areas of finance and insurance. This allows for the easy identification of standard Monte Carlo tools and for a detailed focus on the main principles of financial and insurance mathematics. The book describes high-level Monte Carlo methods for standard simulation and the simulation of...

  14. Information systems planning in public administration; Definizione di una metodologia per la pianificazione dei sistemi informativi in un ente pubblico di ricerca con elevato livello di decentramento

    Energy Technology Data Exchange (ETDEWEB)

    Minelle, F [Rome, Univ. ` La Sapienza` (Italy). Fac. di Scienze Matematiche, Fisiche e Naturali; Di Marco, R A [ENEA, Rome (Italy). Funzione Centrale Informatica; Bottini, M

    1997-02-01

    Since before the Ninety the common experience of the different of the divisions of the Public Administration, it was to proceed on the way of insertion and the utility of technology informer in shed order. It was evident how it could not operate in the best way, without wright descriptions of the general and sectors reference. In terminus of efficiency, efficacy and transparency of services offered and the investment made were inadequate. And so in this way the operation was not good enough to pay attention to a valuation of the cost, beneficial of the investment made, that was growing up. It is today getting important to entrust the planning of the information system, that was to be done every year when we talk about a plan with an average limit. So they can be oriented and checked, the choice of the single Administration. In the following work it has been started from the analysis of the italian situation, which expect the use of a specific methodology produced by the AIPA for the planning of informative system in the public administration. The new experimental part of the thesis aims to the adjustment of this methodology to a reality which is the ENEA, that differs for example from that of a Ministry (for that reality on the contrary the proposal of AIPA is optimal), as the institutional aims and the following modalities of administration change, as the corporation is characterised by a strong decentralisation and above all as it has lacked a cognitive research about the different work processes, introduction to the application of AIPA`s proposal. [Italiano] E` stata fino da prima degli anni `90 esperienza comune che nei vari comparti della Pubblica Amministrazione, si procedesse sulla strada dell`inserimento e dell`utilizzo delle tecnologie ifnormatiche in ordine sparso. E` stato evidente come non si potessero operare scelte ottimali nell`assenza di quadri di riferimento generali e settoriali; che i ritorni, in termini di efficenza, efficacia e trasparenza dei

  15. CT findings after normal and unsuccessful functional endoscopic sinus surgery; Ruolod della tomografia computerizzata dopo chirurgia funzionale dei seni paranasali: rilievi normali e valutazioni degli insuccessi chirurgici

    Energy Technology Data Exchange (ETDEWEB)

    Scribano, E.; Ascenti, G.; Bellinvia, A.; Mazziotti, S.; Lamberto, S. [Messina Univ., Messina (Italy). Ist. di Scienze Radiologiche; Cascio, F. [Messina Univ., Messina (Italy). Ist. di Otorinolaringoiatria

    1999-09-01

    The paper investigates the functional endoscopic sinus surgery with the Messer-linger's technique which treats benign or inflammatory diseases of paranasal sinuses resistant to medical therapy. The goal of this type of surgery is to open the obstructed sinus ostia and restore normal aeration and mucociliary clearance. The computerized tomography permits an accurate assessment of extension and results of functional endoscopic sinus surgery. [Italian] L'articolo discute l'uso della tecnica di Messerklinger nella chirurgia funzionale endoscopica dei seni paranasali per il trattamento delle malattie benigne e delle infiammazioni croniche. Essa disostruisce gli osti sinusali ripristinando la normale areazione e la pulizia mucociliare. La tomografia computerizzata consente di valutare l'estensione e i risultati del trattamento chirurgico funzionale, soprattutto nel caso di insuccesso terapeutico, rilevando malattia nasosinusale ricorrente e-o recidiva.

  16. Il SIT del Servizio Geologico d’Italia implementa i contenuti La banca dati dei sondaggi profondi per la ricerca di idrocarburi

    Directory of Open Access Journals (Sweden)

    Marco Pantaloni

    2007-04-01

    Full Text Available Il Servizio Geologico d’Italia - Dipartimento Difesa del Suolo, ha raccolto l’archivio storico dei pozzi per ricerca petrolifera perforati in Italia. Tale possibilità ci è stata consentita grazie alla cortese collaborazione dell’Ufficio Nazionale Minerario per gli Idrocarburi e la Geotermia (UNMIG della Direzione Generale dell’Energia e delle Risorse Minerarie (DGERM del Ministero dello Sviluppo Economico. Nell’archivio sono contenuti tutti i dati dell’attività di esplorazione e produzione degli idrocarburi in Italia depositati presso l’UNMIG dal 1957 a oggi, e che per legge possono essere resi pubblici dopo un anno dalla cessazione del titolo minerario della società che li ha realizzati.

  17. Interoperabilità dei dati territoriali: il GN si dota di un nuovo servizio per la trasformazione di coordinate per l’intero territorio italiano

    Directory of Open Access Journals (Sweden)

    Salvatore Costabile

    2013-03-01

    Full Text Available Il servizio di trasformazione di coordinate (CTS, Coordinate Transformation Service è uno dei servizi ditrasformazione geometrica previsti dall’implementazione della direttiva 2007/2/CE INSPIRE. Le applicazioniWEB e WCTS messe a disposizione dal Geoportale Nazionale consentono a tutti gli utenti di eseguiretrasformazioni di coordinate sull’intero territorio italiano impiegando i grigliati rilasciati dall’IstitutoGeografico Militare Italiano (IGM.Abstract The Coordinate Transformation Service (CTS is one of theservices provided by the implementation of the geometric transformation of the INSPIRE Directive 2007/2/EC. WEB applications and WCTS service are provided by the National Geoportal (Geoportale Nazionale allowing all users to perform coordinate transformations on the entire Italian territory using also detailed grid value released by IGM (Italian Military Geographical Institute.  

  18. Interoperabilità dei dati territoriali: il GN si dota di un nuovo servizio per la trasformazione di coordinate per l’intero territorio italiano

    Directory of Open Access Journals (Sweden)

    Salvatore Costabile

    2013-03-01

    Full Text Available Il servizio di trasformazione di coordinate (CTS, Coordinate Transformation Service è uno dei servizi ditrasformazione geometrica previsti dall’implementazione della direttiva 2007/2/CE INSPIRE. Le applicazioniWEB e WCTS messe a disposizione dal Geoportale Nazionale consentono a tutti gli utenti di eseguiretrasformazioni di coordinate sull’intero territorio italiano impiegando i grigliati rilasciati dall’IstitutoGeografico Militare Italiano (IGM. Abstract The Coordinate Transformation Service (CTS is one of theservices provided by the implementation of the geometric transformation of the INSPIRE Directive 2007/2/EC. WEB applications and WCTS service are provided by the National Geoportal (Geoportale Nazionale allowing all users to perform coordinate transformations on the entire Italian territory using also detailed grid value released by IGM (Italian Military Geographical Institute.

  19. Innovation and competitivity. The case of the districts of Faenza and Prato; Innovazione e competitivita'. Il caso dei distretti di Faenza e di Prato

    Energy Technology Data Exchange (ETDEWEB)

    Traverso, A. [ENEA, Funzione Centrale Studi, Centro Ricerche Casaccia, Rome (Italy)

    2001-07-01

    Market's globalization is quickly producing the review of the traditional and international competition orders. For this reason the industrial districts, which are the highest expression of an economic and productive tissue based on the small and medium enterprises, are forced to begin a new formulation of their own structural, organizational, technological and productive distinctive features. The object of this work is, at first, to explain the peculiarities of the distrectual events, and, consequently, to analyse the competitive situation and the future prospects of two italian highly specialized productive areas: the textile district of Prato and the ceramic territory of Faenza. A particular attention will be especially reserved on the role assumed by the innovative aspects (technological and organizational) which it can be noted in that transformation process of the main distrectual competitive paradigms. [Italian] La globalizzazione dei mercati sta velocemente imponendo una revisione delle tradizionali regole della competizione internazionale. Per questo motivo i distretti industriali, che sono la massima espressione di un tessuto economico e produttivo fondato sulla piccola e media impresa, sono stati costretti ad intraprendere un percorso di riformulazione delle proprie caratteristiche strutturali, organizzative, tecnologiche e produttive. Lo scopo di questo lavoro e' di illustrare, in un primo momento, i contorni del fenomeno distrettuale e, conseguentemente, di analizzare la situazione competitiva e le prospettive di sviluppo di due aree italiane fortemente specializzate dal punto di vista produttivo: il distretto tessile di Prato ed il comprensorio della ceramica di Faenza. Una particolare attenzione verra' riservata, nel corso dell'analisi, al ruolo assunto dagli aspetti innovativi (technologici ed innovativi) in questo processo di trasformazione dei principali paradigmi competitivi distrettuali.

  20. Innovation and competitivity. The case of the districts of Faenza and Prato; Innovazione e competitivita'. Il caso dei distretti di Faenza e di Prato

    Energy Technology Data Exchange (ETDEWEB)

    Traverso, A [ENEA, Funzione Centrale Studi, Centro Ricerche Casaccia, Rome (Italy)

    2001-07-01

    Market's globalization is quickly producing the review of the traditional and international competition orders. For this reason the industrial districts, which are the highest expression of an economic and productive tissue based on the small and medium enterprises, are forced to begin a new formulation of their own structural, organizational, technological and productive distinctive features. The object of this work is, at first, to explain the peculiarities of the distrectual events, and, consequently, to analyse the competitive situation and the future prospects of two italian highly specialized productive areas: the textile district of Prato and the ceramic territory of Faenza. A particular attention will be especially reserved on the role assumed by the innovative aspects (technological and organizational) which it can be noted in that transformation process of the main distrectual competitive paradigms. [Italian] La globalizzazione dei mercati sta velocemente imponendo una revisione delle tradizionali regole della competizione internazionale. Per questo motivo i distretti industriali, che sono la massima espressione di un tessuto economico e produttivo fondato sulla piccola e media impresa, sono stati costretti ad intraprendere un percorso di riformulazione delle proprie caratteristiche strutturali, organizzative, tecnologiche e produttive. Lo scopo di questo lavoro e' di illustrare, in un primo momento, i contorni del fenomeno distrettuale e, conseguentemente, di analizzare la situazione competitiva e le prospettive di sviluppo di due aree italiane fortemente specializzate dal punto di vista produttivo: il distretto tessile di Prato ed il comprensorio della ceramica di Faenza. Una particolare attenzione verra' riservata, nel corso dell'analisi, al ruolo assunto dagli aspetti innovativi (technologici ed innovativi) in questo processo di trasformazione dei principali paradigmi competitivi distrettuali.

  1. Debito estero e fragilità finanziaria nell’ottica dei paesi emergenti ((Foreign debt and financial fragility in view of the emerging countries

    Directory of Open Access Journals (Sweden)

    Mario Tonveronachi

    2012-04-01

    Full Text Available Sulla scia dell’impostazione minskiana della fragilità finanziaria e dei suoi successivi sviluppi offerti da Kregel, il lavoro affronta alcuni aspetti di base della dinamica e della gestione del debito estero nell’ottica dei paesi emergenti. Al fine di definire la fragilità esterna di un paese si riformulano le definizioni di Minsky di posizioni coperte, speculative e Ponzi. L’analisi di come, asimmetrie nella fragilità finanziaria esterna, possano influenzare la fragilità globale conduce a discutere i limiti dell’apertura finanziaria internazionale. Infine, la distinzione tra fragilità finanziaria interna ed esterna permette di analizzare come l’interazione dinamica tra le unità economiche, compreso il governo e le sue politiche, può influenzare la distribuzione e il livello di entrambi i tipi di fragilità.    In the wake of the minskian setting of financial fragility and its subsequent developments offered by Kregel, the paper addresses some basic aspects of the dynamics and management of external debt from the perspective of developing countries. In order to define the external fragility of a country reformulate the definition of Minsky of hedged positions, speculative, and Ponzi. The analysis of how, asymmetries in the external financial fragility, may affect the overall fragility leads to discuss the limits of the opening international financial. Finally, the distinction between internal and external financial fragility makes it possible to analyze how the dynamic interaction between economic units, including the government and its policies, can influence the distribution and the level of both types of fragility. JEL Codes: E44, F34, F4Keywords: Kregel, Minksy, fragilità finanziaria, debito estero , paesi emergenti

  2. L’innovazione dell’amministrazione dei beni culturali in Italia: caratteristiche e criticità / The innovation of cultural heritage administration in Italy: peculiarities and criticalities

    Directory of Open Access Journals (Sweden)

    Mariateresa Nacci

    2014-03-01

    Full Text Available L'articolo si apre con l’analisi di un fenomeno internazionale di riforma della pubblica amministrazione, conosciuto come New Public Management, che ha trovato ampia diffusione soprattutto nei paesi anglosassoni e che ha, con le sue logiche, innescato un processo di grandi cambiamenti anche nel settore dei beni culturali, interessandone la normativa, l’organizzazione delle strutture e i modelli di gestione. Dopo una breve disamina sulle novità che il fenomeno ha introdotto in primis nel Regno Unito, l’attenzione viene focalizzata sul ritardo con cui in Italia è stato intrapreso questo percorso, e su come alcune importanti occasioni di innovazione nel settore dei beni culturali si siano trasformate in occasioni perse. Il contributo termina con alcune riflessioni sui motivi del ritardo e sui possibili interventi utili a migliorare una situazione di lentezza che si presenta stabile, consolidata e purtroppo strutturale.   The paper starts with an analysis of an international phenomenon of public administration reform, known as New Public Management, which has found widespread use, especially in Anglo-Saxon countries and that has, with its logic, triggered a process of great change even in the field of cultural heritage, affecting legislation, organization and management models. After a short discussion on the innovations that first of all the phenomenon has introduced in United Kingdom, the attention is focused on the delay wherewith in Italy the new way has started, and how some important opportunities for innovation in the field of cultural heritage have been transformed into missed opportunities. The essay concludes with some reflections on the reasons for the delay and any possible useful intervention to improve a situation of slowness that is stable, consolidated and unfortunately structural.

  3. Belo Monte hydropower project: actual studies; AHE Belo Monte: os estudos atuais

    Energy Technology Data Exchange (ETDEWEB)

    Figueira Netto, Carlos Alberto de Moya [CNEC Engenharia S.A., Sao Paulo, SP (Brazil); Rezende, Paulo Fernando Vieira Souto [Centrais Eletricas Brasileiras S.A. (ELETROBRAS), Rio de Janeiro, RJ (Brazil)

    2008-07-01

    This article presents the evolution of the studies of Belo Monte Hydro Power Project (HPP) since the initial inventory studies of the Xingu River in 1979 until the current studies for conclusion of the Technical, Economic and Environmental Feasibility Studies the Belo Monte Hydro Power Project, as authorized by Brazilian National Congress. The current studies characterize the Belo Monte HPP with an installed capacity of 11,181.3 MW (20 units of 550 MW in the main power house and 7 units of 25.9 MW in the additional power house), connected to the Brazilian Interconnected Power Grid, allowing to generate 4,796 mean MW of firm energy, without depending on any flow rate regularization of the upstream Xingu river flooding only 441 k m2, of which approximately 200 k m2, correspond to the normal annual wet season flooding of the Xingu River. (author)

  4. Guideline of Monte Carlo calculation. Neutron/gamma ray transport simulation by Monte Carlo method

    CERN Document Server

    2002-01-01

    This report condenses basic theories and advanced applications of neutron/gamma ray transport calculations in many fields of nuclear energy research. Chapters 1 through 5 treat historical progress of Monte Carlo methods, general issues of variance reduction technique, cross section libraries used in continuous energy Monte Carlo codes. In chapter 6, the following issues are discussed: fusion benchmark experiments, design of ITER, experiment analyses of fast critical assembly, core analyses of JMTR, simulation of pulsed neutron experiment, core analyses of HTTR, duct streaming calculations, bulk shielding calculations, neutron/gamma ray transport calculations of the Hiroshima atomic bomb. Chapters 8 and 9 treat function enhancements of MCNP and MVP codes, and a parallel processing of Monte Carlo calculation, respectively. An important references are attached at the end of this report.

  5. Statistical estimation Monte Carlo for unreliability evaluation of highly reliable system

    International Nuclear Information System (INIS)

    Xiao Gang; Su Guanghui; Jia Dounan; Li Tianduo

    2000-01-01

    Based on analog Monte Carlo simulation, statistical Monte Carlo methods for unreliable evaluation of highly reliable system are constructed, including direct statistical estimation Monte Carlo method and weighted statistical estimation Monte Carlo method. The basal element is given, and the statistical estimation Monte Carlo estimators are derived. Direct Monte Carlo simulation method, bounding-sampling method, forced transitions Monte Carlo method, direct statistical estimation Monte Carlo and weighted statistical estimation Monte Carlo are used to evaluate unreliability of a same system. By comparing, weighted statistical estimation Monte Carlo estimator has smallest variance, and has highest calculating efficiency

  6. Investigating the impossible: Monte Carlo simulations

    International Nuclear Information System (INIS)

    Kramer, Gary H.; Crowley, Paul; Burns, Linda C.

    2000-01-01

    Designing and testing new equipment can be an expensive and time consuming process or the desired performance characteristics may preclude its construction due to technological shortcomings. Cost may also prevent equipment being purchased for other scenarios to be tested. An alternative is to use Monte Carlo simulations to make the investigations. This presentation exemplifies how Monte Carlo code calculations can be used to fill the gap. An example is given for the investigation of two sizes of germanium detector (70 mm and 80 mm diameter) at four different crystal thicknesses (15, 20, 25, and 30 mm) and makes predictions on how the size affects the counting efficiency and the Minimum Detectable Activity (MDA). The Monte Carlo simulations have shown that detector efficiencies can be adequately modelled using photon transport if the data is used to investigate trends. The investigation of the effect of detector thickness on the counting efficiency has shown that thickness for a fixed diameter detector of either 70 mm or 80 mm is unimportant up to 60 keV. At higher photon energies, the counting efficiency begins to decrease as the thickness decreases as expected. The simulations predict that the MDA of either the 70 mm or 80 mm diameter detectors does not differ by more than a factor of 1.15 at 17 keV or 1.2 at 60 keV when comparing detectors of equivalent thicknesses. The MDA is slightly increased at 17 keV, and rises by about 52% at 660 keV, when the thickness is decreased from 30 mm to 15 mm. One could conclude from this information that the extra cost associated with the larger area Ge detectors may not be justified for the slight improvement predicted in the MDA. (author)

  7. Monte Carlo Simulation of an American Option

    Directory of Open Access Journals (Sweden)

    Gikiri Thuo

    2007-04-01

    Full Text Available We implement gradient estimation techniques for sensitivity analysis of option pricing which can be efficiently employed in Monte Carlo simulation. Using these techniques we can simultaneously obtain an estimate of the option value together with the estimates of sensitivities of the option value to various parameters of the model. After deriving the gradient estimates we incorporate them in an iterative stochastic approximation algorithm for pricing an option with early exercise features. We illustrate the procedure using an example of an American call option with a single dividend that is analytically tractable. In particular we incorporate estimates for the gradient with respect to the early exercise threshold level.

  8. Monte Carlo study of the multiquark systems

    International Nuclear Information System (INIS)

    Kerbikov, B.O.; Polikarpov, M.I.; Zamolodchikov, A.B.

    1986-01-01

    Random walks have been used to calculate the energies of the ground states in systems of N=3, 6, 9, 12 quarks. Multiquark states with N>3 are unstable with respect to the spontaneous dissociation into color singlet hadrons. The modified Green's function Monte Carlo algorithm which proved to be more simple and much accurate than the conventional few body methods have been employed. In contrast to other techniques, the same equations are used for any number of particles, while the computer time increases only linearly V, S the number of particles

  9. Monte Carlo eigenfunction strategies and uncertainties

    International Nuclear Information System (INIS)

    Gast, R.C.; Candelore, N.R.

    1974-01-01

    Comparisons of convergence rates for several possible eigenfunction source strategies led to the selection of the ''straight'' analog of the analytic power method as the source strategy for Monte Carlo eigenfunction calculations. To insure a fair game strategy, the number of histories per iteration increases with increasing iteration number. The estimate of eigenfunction uncertainty is obtained from a modification of a proposal by D. B. MacMillan and involves only estimates of the usual purely statistical component of uncertainty and a serial correlation coefficient of lag one. 14 references. (U.S.)

  10. ATLAS Monte Carlo tunes for MC09

    CERN Document Server

    The ATLAS collaboration

    2010-01-01

    This note describes the ATLAS tunes of underlying event and minimum bias description for the main Monte Carlo generators used in the MC09 production. For the main shower generators, pythia and herwig (with jimmy), the MRST LO* parton distribution functions (PDFs) were used for the first time in ATLAS. Special studies on the performance of these, conceptually new, PDFs for high pt physics processes at LHC energies are presented. In addition, a tune of jimmy for CTEQ6.6 is presented, for use with MC@NLO.

  11. Markov chains analytic and Monte Carlo computations

    CERN Document Server

    Graham, Carl

    2014-01-01

    Markov Chains: Analytic and Monte Carlo Computations introduces the main notions related to Markov chains and provides explanations on how to characterize, simulate, and recognize them. Starting with basic notions, this book leads progressively to advanced and recent topics in the field, allowing the reader to master the main aspects of the classical theory. This book also features: Numerous exercises with solutions as well as extended case studies.A detailed and rigorous presentation of Markov chains with discrete time and state space.An appendix presenting probabilistic notions that are nec

  12. Atomistic Monte Carlo simulation of lipid membranes

    DEFF Research Database (Denmark)

    Wüstner, Daniel; Sklenar, Heinz

    2014-01-01

    Biological membranes are complex assemblies of many different molecules of which analysis demands a variety of experimental and computational approaches. In this article, we explain challenges and advantages of atomistic Monte Carlo (MC) simulation of lipid membranes. We provide an introduction...... into the various move sets that are implemented in current MC methods for efficient conformational sampling of lipids and other molecules. In the second part, we demonstrate for a concrete example, how an atomistic local-move set can be implemented for MC simulations of phospholipid monomers and bilayer patches...

  13. Monte Carlo method in radiation transport problems

    International Nuclear Information System (INIS)

    Dejonghe, G.; Nimal, J.C.; Vergnaud, T.

    1986-11-01

    In neutral radiation transport problems (neutrons, photons), two values are important: the flux in the phase space and the density of particles. To solve the problem with Monte Carlo method leads to, among other things, build a statistical process (called the play) and to provide a numerical value to a variable x (this attribution is called score). Sampling techniques are presented. Play biasing necessity is proved. A biased simulation is made. At last, the current developments (rewriting of programs for instance) are presented due to several reasons: two of them are the vectorial calculation apparition and the photon and neutron transport in vacancy media [fr

  14. Mosaic crystal algorithm for Monte Carlo simulations

    CERN Document Server

    Seeger, P A

    2002-01-01

    An algorithm is presented for calculating reflectivity, absorption, and scattering of mosaic crystals in Monte Carlo simulations of neutron instruments. The algorithm uses multi-step transport through the crystal with an exact solution of the Darwin equations at each step. It relies on the kinematical model for Bragg reflection (with parameters adjusted to reproduce experimental data). For computation of thermal effects (the Debye-Waller factor and coherent inelastic scattering), an expansion of the Debye integral as a rapidly converging series of exponential terms is also presented. Any crystal geometry and plane orientation may be treated. The algorithm has been incorporated into the neutron instrument simulation package NISP. (orig.)

  15. A note on simultaneous Monte Carlo tests

    DEFF Research Database (Denmark)

    Hahn, Ute

    In this short note, Monte Carlo tests of goodness of fit for data of the form X(t), t ∈ I are considered, that reject the null hypothesis if X(t) leaves an acceptance region bounded by an upper and lower curve for some t in I. A construction of the acceptance region is proposed that complies to a...... to a given target level of rejection, and yields exact p-values. The construction is based on pointwise quantiles, estimated from simulated realizations of X(t) under the null hypothesis....

  16. Monte Carlo methods to calculate impact probabilities

    Science.gov (United States)

    Rickman, H.; Wiśniowski, T.; Wajer, P.; Gabryszewski, R.; Valsecchi, G. B.

    2014-09-01

    Context. Unraveling the events that took place in the solar system during the period known as the late heavy bombardment requires the interpretation of the cratered surfaces of the Moon and terrestrial planets. This, in turn, requires good estimates of the statistical impact probabilities for different source populations of projectiles, a subject that has received relatively little attention, since the works of Öpik (1951, Proc. R. Irish Acad. Sect. A, 54, 165) and Wetherill (1967, J. Geophys. Res., 72, 2429). Aims: We aim to work around the limitations of the Öpik and Wetherill formulae, which are caused by singularities due to zero denominators under special circumstances. Using modern computers, it is possible to make good estimates of impact probabilities by means of Monte Carlo simulations, and in this work, we explore the available options. Methods: We describe three basic methods to derive the average impact probability for a projectile with a given semi-major axis, eccentricity, and inclination with respect to a target planet on an elliptic orbit. One is a numerical averaging of the Wetherill formula; the next is a Monte Carlo super-sizing method using the target's Hill sphere. The third uses extensive minimum orbit intersection distance (MOID) calculations for a Monte Carlo sampling of potentially impacting orbits, along with calculations of the relevant interval for the timing of the encounter allowing collision. Numerical experiments are carried out for an intercomparison of the methods and to scrutinize their behavior near the singularities (zero relative inclination and equal perihelion distances). Results: We find an excellent agreement between all methods in the general case, while there appear large differences in the immediate vicinity of the singularities. With respect to the MOID method, which is the only one that does not involve simplifying assumptions and approximations, the Wetherill averaging impact probability departs by diverging toward

  17. MBR Monte Carlo Simulation in PYTHIA8

    Science.gov (United States)

    Ciesielski, R.

    We present the MBR (Minimum Bias Rockefeller) Monte Carlo simulation of (anti)proton-proton interactions and its implementation in the PYTHIA8 event generator. We discuss the total, elastic, and total-inelastic cross sections, and three contributions from diffraction dissociation processes that contribute to the latter: single diffraction, double diffraction, and central diffraction or double-Pomeron exchange. The event generation follows a renormalized-Regge-theory model, successfully tested using CDF data. Based on the MBR-enhanced PYTHIA8 simulation, we present cross-section predictions for the LHC and beyond, up to collision energies of 50 TeV.

  18. Spectral functions from Quantum Monte Carlo

    International Nuclear Information System (INIS)

    Silver, R.N.

    1989-01-01

    In his review, D. Scalapino identified two serious limitations on the application of Quantum Monte Carlo (QMC) methods to the models of interest in High T c Superconductivity (HTS). One is the ''sign problem''. The other is the ''analytic continuation problem'', which is how to extract electron spectral functions from QMC calculations of the imaginary time Green's functions. Through-out this Symposium on HTS, the spectral functions have been the focus for the discussion of normal state properties including the applicability of band theory, Fermi liquid theory, marginal Fermi liquids, and novel non-perturbative states. 5 refs., 1 fig

  19. An analysis of Monte Carlo tree search

    CSIR Research Space (South Africa)

    James, S

    2017-02-01

    Full Text Available Tree Search Steven James∗, George Konidaris† & Benjamin Rosman∗‡ ∗University of the Witwatersrand, Johannesburg, South Africa †Brown University, Providence RI 02912, USA ‡Council for Scientific and Industrial Research, Pretoria, South Africa steven....james@students.wits.ac.za, gdk@cs.brown.edu, brosman@csir.co.za Abstract Monte Carlo Tree Search (MCTS) is a family of directed search algorithms that has gained widespread attention in re- cent years. Despite the vast amount of research into MCTS, the effect of modifications...

  20. Monte Carlo simulation for the transport beamline

    Energy Technology Data Exchange (ETDEWEB)

    Romano, F.; Cuttone, G.; Jia, S. B.; Varisano, A. [INFN, Laboratori Nazionali del Sud, Via Santa Sofia 62, Catania (Italy); Attili, A.; Marchetto, F.; Russo, G. [INFN, Sezione di Torino, Via P.Giuria, 1 10125 Torino (Italy); Cirrone, G. A. P.; Schillaci, F.; Scuderi, V. [INFN, Laboratori Nazionali del Sud, Via Santa Sofia 62, Catania, Italy and Institute of Physics Czech Academy of Science, ELI-Beamlines project, Na Slovance 2, Prague (Czech Republic); Carpinelli, M. [INFN Sezione di Cagliari, c/o Dipartimento di Fisica, Università di Cagliari, Cagliari (Italy); Tramontana, A. [INFN, Laboratori Nazionali del Sud, Via Santa Sofia 62, Catania, Italy and Università di Catania, Dipartimento di Fisica e Astronomia, Via S. Sofia 64, Catania (Italy)

    2013-07-26

    In the framework of the ELIMED project, Monte Carlo (MC) simulations are widely used to study the physical transport of charged particles generated by laser-target interactions and to preliminarily evaluate fluence and dose distributions. An energy selection system and the experimental setup for the TARANIS laser facility in Belfast (UK) have been already simulated with the GEANT4 (GEometry ANd Tracking) MC toolkit. Preliminary results are reported here. Future developments are planned to implement a MC based 3D treatment planning in order to optimize shots number and dose delivery.

  1. Monte Carlo simulation for the transport beamline

    International Nuclear Information System (INIS)

    Romano, F.; Cuttone, G.; Jia, S. B.; Varisano, A.; Attili, A.; Marchetto, F.; Russo, G.; Cirrone, G. A. P.; Schillaci, F.; Scuderi, V.; Carpinelli, M.; Tramontana, A.

    2013-01-01

    In the framework of the ELIMED project, Monte Carlo (MC) simulations are widely used to study the physical transport of charged particles generated by laser-target interactions and to preliminarily evaluate fluence and dose distributions. An energy selection system and the experimental setup for the TARANIS laser facility in Belfast (UK) have been already simulated with the GEANT4 (GEometry ANd Tracking) MC toolkit. Preliminary results are reported here. Future developments are planned to implement a MC based 3D treatment planning in order to optimize shots number and dose delivery

  2. Diffusion quantum Monte Carlo for molecules

    International Nuclear Information System (INIS)

    Lester, W.A. Jr.

    1986-07-01

    A quantum mechanical Monte Carlo method has been used for the treatment of molecular problems. The imaginary-time Schroedinger equation written with a shift in zero energy [E/sub T/ - V(R)] can be interpreted as a generalized diffusion equation with a position-dependent rate or branching term. Since diffusion is the continuum limit of a random walk, one may simulate the Schroedinger equation with a function psi (note, not psi 2 ) as a density of ''walks.'' The walks undergo an exponential birth and death as given by the rate term. 16 refs., 2 tabs

  3. Monte Carlo modelling for neutron guide losses

    International Nuclear Information System (INIS)

    Cser, L.; Rosta, L.; Toeroek, Gy.

    1989-09-01

    In modern research reactors, neutron guides are commonly used for beam conducting. The neutron guide is a well polished or equivalently smooth glass tube covered inside by sputtered or evaporated film of natural Ni or 58 Ni isotope where the neutrons are totally reflected. A Monte Carlo calculation was carried out to establish the real efficiency and the spectral as well as spatial distribution of the neutron beam at the end of a glass mirror guide. The losses caused by mechanical inaccuracy and mirror quality were considered and the effects due to the geometrical arrangement were analyzed. (author) 2 refs.; 2 figs

  4. Strategies and methods of development of information systems; Strategie e metodi di sviluppo dei sistemi informativi aziendali

    Energy Technology Data Exchange (ETDEWEB)

    Moretti, M; Lucchetti, M C [Rome Univ. 3, Rome (Italy). Facolta' di Economia Federico Caffe' ; Di Marco, R A [ENEA, Funzione Centrale Informatica, Sede Centrale, Rome (Italy)

    2001-07-01

    in secondo piano, attraversato soltanto marginalmente e quasi sempre esposto da un punto di vista unico. Si finisce cosi' per avere una conoscenza dell'argomento frammentaria e dispersa, che non permette di gestire poi nella pratica questa fondamentale risorsa aziendale. Coscienti di aver dato solo un piccolo contributo, con questa tesi si e' cercato di ritrovare l'unitarieta' dell'argomento. Questo ha comportato un primo passo fondato sulla ricerca dei pezzi teorici sparsi nelle principali discipline aziendali, che spaziano dall'organizzazione, alla gestione d'impresa, alle strategie, alla qualita' e all'amministrazione. Dopo una fase di introduzione all'argomento, in cui per i meno addetti, si sono descritte e analizzate le molteplici definizioni, necessarie per proseguire con il discorso, si e' passati allo studio dell'impatto del sistema informativo nelle diverse attivita' aziendali. Il punto di vista adottato e' sempre stato il sistema informativo, e tramite di esso si e' entrati nei diversi campi di studio, seguendo un approccio inverso rispetto a quello normalmente seguito. Il concetto chiave che e' emerso da questa analisi e' sintetizzabile in una parola: cambiamento. Cambiamento nella struttura organizzativa, nella definizione di qualita', nelle strategie. Seguendo questa traccia si e', in particolar modo, focalizzato sull'impatto e l'influenza esercitata dalle nuove tecnologie informatiche in molte realta' aziendali, nella definizione delle scelte strategiche. La seconda parte vede applicare questi principi ad un caso concreto, l'ENEA. Anche in questa parte ci si e' concentrati sulle opportunita' strategiche offerte all'ente dalle nuove tecnologie, e si e' misurato l'impatto concreto sulle scelte direzionali. Dal lavoro svolto sul posto, da discussioni con i responsabili, dall'esame di documenti aziendali interni, e alla luce delle considerazioni teoriche svolte nella prima parte, sono emerse alcune criticita' nello sfruttamento del sistema informativo

  5. Strategies and methods of development of information systems; Strategie e metodi di sviluppo dei sistemi informativi aziendali

    Energy Technology Data Exchange (ETDEWEB)

    Moretti, M.; Lucchetti, M.C. [Rome Univ. 3, Rome (Italy). Facolta' di Economia Federico Caffe' ; Di Marco, R.A. [ENEA, Funzione Centrale Informatica, Sede Centrale, Rome (Italy)

    2001-07-01

    aziendali viene posto in secondo piano, attraversato soltanto marginalmente e quasi sempre esposto da un punto di vista unico. Si finisce cosi' per avere una conoscenza dell'argomento frammentaria e dispersa, che non permette di gestire poi nella pratica questa fondamentale risorsa aziendale. Coscienti di aver dato solo un piccolo contributo, con questa tesi si e' cercato di ritrovare l'unitarieta' dell'argomento. Questo ha comportato un primo passo fondato sulla ricerca dei pezzi teorici sparsi nelle principali discipline aziendali, che spaziano dall'organizzazione, alla gestione d'impresa, alle strategie, alla qualita' e all'amministrazione. Dopo una fase di introduzione all'argomento, in cui per i meno addetti, si sono descritte e analizzate le molteplici definizioni, necessarie per proseguire con il discorso, si e' passati allo studio dell'impatto del sistema informativo nelle diverse attivita' aziendali. Il punto di vista adottato e' sempre stato il sistema informativo, e tramite di esso si e' entrati nei diversi campi di studio, seguendo un approccio inverso rispetto a quello normalmente seguito. Il concetto chiave che e' emerso da questa analisi e' sintetizzabile in una parola: cambiamento. Cambiamento nella struttura organizzativa, nella definizione di qualita', nelle strategie. Seguendo questa traccia si e', in particolar modo, focalizzato sull'impatto e l'influenza esercitata dalle nuove tecnologie informatiche in molte realta' aziendali, nella definizione delle scelte strategiche. La seconda parte vede applicare questi principi ad un caso concreto, l'ENEA. Anche in questa parte ci si e' concentrati sulle opportunita' strategiche offerte all'ente dalle nuove tecnologie, e si e' misurato l'impatto concreto sulle scelte direzionali. Dal lavoro svolto sul posto, da discussioni con i responsabili, dall'esame di documenti

  6. Diffusion Monte Carlo approach versus adiabatic computation for local Hamiltonians

    Science.gov (United States)

    Bringewatt, Jacob; Dorland, William; Jordan, Stephen P.; Mink, Alan

    2018-02-01

    Most research regarding quantum adiabatic optimization has focused on stoquastic Hamiltonians, whose ground states can be expressed with only real non-negative amplitudes and thus for whom destructive interference is not manifest. This raises the question of whether classical Monte Carlo algorithms can efficiently simulate quantum adiabatic optimization with stoquastic Hamiltonians. Recent results have given counterexamples in which path-integral and diffusion Monte Carlo fail to do so. However, most adiabatic optimization algorithms, such as for solving MAX-k -SAT problems, use k -local Hamiltonians, whereas our previous counterexample for diffusion Monte Carlo involved n -body interactions. Here we present a 6-local counterexample which demonstrates that even for these local Hamiltonians there are cases where diffusion Monte Carlo cannot efficiently simulate quantum adiabatic optimization. Furthermore, we perform empirical testing of diffusion Monte Carlo on a standard well-studied class of permutation-symmetric tunneling problems and similarly find large advantages for quantum optimization over diffusion Monte Carlo.

  7. Monte Carlo learning/biasing experiment with intelligent random numbers

    International Nuclear Information System (INIS)

    Booth, T.E.

    1985-01-01

    A Monte Carlo learning and biasing technique is described that does its learning and biasing in the random number space rather than the physical phase-space. The technique is probably applicable to all linear Monte Carlo problems, but no proof is provided here. Instead, the technique is illustrated with a simple Monte Carlo transport problem. Problems encountered, problems solved, and speculations about future progress are discussed. 12 refs

  8. Discrete diffusion Monte Carlo for frequency-dependent radiative transfer

    International Nuclear Information System (INIS)

    Densmore, Jeffery D.; Thompson, Kelly G.; Urbatsch, Todd J.

    2011-01-01

    Discrete Diffusion Monte Carlo (DDMC) is a technique for increasing the efficiency of Implicit Monte Carlo radiative-transfer simulations. In this paper, we develop an extension of DDMC for frequency-dependent radiative transfer. We base our new DDMC method on a frequency integrated diffusion equation for frequencies below a specified threshold. Above this threshold we employ standard Monte Carlo. With a frequency-dependent test problem, we confirm the increased efficiency of our new DDMC technique. (author)

  9. Monte Carlo criticality analysis for dissolvers with neutron poison

    International Nuclear Information System (INIS)

    Yu, Deshun; Dong, Xiufang; Pu, Fuxiang.

    1987-01-01

    Criticality analysis for dissolvers with neutron poison is given on the basis of Monte Carlo method. In Monte Carlo calculations of thermal neutron group parameters for fuel pieces, neutron transport length is determined in terms of maximum cross section approach. A set of related effective multiplication factors (K eff ) are calculated by Monte Carlo method for the three cases. Related numerical results are quite useful for the design and operation of this kind of dissolver in the criticality safety analysis. (author)

  10. Temperature variance study in Monte-Carlo photon transport theory

    International Nuclear Information System (INIS)

    Giorla, J.

    1985-10-01

    We study different Monte-Carlo methods for solving radiative transfer problems, and particularly Fleck's Monte-Carlo method. We first give the different time-discretization schemes and the corresponding stability criteria. Then we write the temperature variance as a function of the variances of temperature and absorbed energy at the previous time step. Finally we obtain some stability criteria for the Monte-Carlo method in the stationary case [fr

  11. Le Comte de Monte Cristo: da literatura ao cinema

    OpenAIRE

    Caravela, Natércia Murta Silva

    2008-01-01

    A presente dissertação discute o diálogo estabelecido entre literatura e cinema no tratamento da personagem principal – um homem traído que se vinga de forma cruel dos seus inimigos – na obra literária Le Comte de Monte-Cristo, de Alexandre Dumas, e nas três adaptações fílmicas escolhidas: Le Comte de Monte-Cristo de Robert Vernay (1943); The count of Monte Cristo de David Greene (1975) e The count of Monte Cristo de Kevin Reynolds (2002). O projecto centra-se na análise da ...

  12. Odd-flavor Simulations by the Hybrid Monte Carlo

    CERN Document Server

    Takaishi, Tetsuya; Takaishi, Tetsuya; De Forcrand, Philippe

    2001-01-01

    The standard hybrid Monte Carlo algorithm is known to simulate even flavors QCD only. Simulations of odd flavors QCD, however, can be also performed in the framework of the hybrid Monte Carlo algorithm where the inverse of the fermion matrix is approximated by a polynomial. In this exploratory study we perform three flavors QCD simulations. We make a comparison of the hybrid Monte Carlo algorithm and the R-algorithm which also simulates odd flavors systems but has step-size errors. We find that results from our hybrid Monte Carlo algorithm are in agreement with those from the R-algorithm obtained at very small step-size.

  13. Wielandt acceleration for MCNP5 Monte Carlo eigenvalue calculations

    International Nuclear Information System (INIS)

    Brown, F.

    2007-01-01

    Monte Carlo criticality calculations use the power iteration method to determine the eigenvalue (k eff ) and eigenfunction (fission source distribution) of the fundamental mode. A recently proposed method for accelerating convergence of the Monte Carlo power iteration using Wielandt's method has been implemented in a test version of MCNP5. The method is shown to provide dramatic improvements in convergence rates and to greatly reduce the possibility of false convergence assessment. The method is effective and efficient, improving the Monte Carlo figure-of-merit for many problems. In addition, the method should eliminate most of the underprediction bias in confidence intervals for Monte Carlo criticality calculations. (authors)

  14. Monte Carlo shielding analyses using an automated biasing procedure

    International Nuclear Information System (INIS)

    Tang, J.S.; Hoffman, T.J.

    1988-01-01

    A systematic and automated approach for biasing Monte Carlo shielding calculations is described. In particular, adjoint fluxes from a one-dimensional discrete ordinates calculation are used to generate biasing parameters for a Monte Carlo calculation. The entire procedure of adjoint calculation, biasing parameters generation, and Monte Carlo calculation has been automated. The automated biasing procedure has been applied to several realistic deep-penetration shipping cask problems. The results obtained for neutron and gamma-ray transport indicate that with the automated biasing procedure Monte Carlo shielding calculations of spent-fuel casks can be easily performed with minimum effort and that accurate results can be obtained at reasonable computing cost

  15. Monte Carlo techniques for analyzing deep-penetration problems

    International Nuclear Information System (INIS)

    Cramer, S.N.; Gonnord, J.; Hendricks, J.S.

    1986-01-01

    Current methods and difficulties in Monte Carlo deep-penetration calculations are reviewed, including statistical uncertainty and recent adjoint optimization of splitting, Russian roulette, and exponential transformation biasing. Other aspects of the random walk and estimation processes are covered, including the relatively new DXANG angular biasing technique. Specific items summarized are albedo scattering, Monte Carlo coupling techniques with discrete ordinates and other methods, adjoint solutions, and multigroup Monte Carlo. The topic of code-generated biasing parameters is presented, including the creation of adjoint importance functions from forward calculations. Finally, current and future work in the area of computer learning and artificial intelligence is discussed in connection with Monte Carlo applications

  16. Igo - A Monte Carlo Code For Radiotherapy Planning

    International Nuclear Information System (INIS)

    Goldstein, M.; Regev, D.

    1999-01-01

    The goal of radiation therapy is to deliver a lethal dose to the tumor, while minimizing the dose to normal tissues and vital organs. To carry out this task, it is critical to calculate correctly the 3-D dose delivered. Monte Carlo transport methods (especially the Adjoint Monte Carlo have the potential to provide more accurate predictions of the 3-D dose the currently used methods. IG0 is a Monte Carlo code derived from the general Monte Carlo Program - MCNP, tailored specifically for calculating the effects of radiation therapy. This paper describes the IG0 transport code, the PIG0 interface and some preliminary results

  17. Quantum statistical Monte Carlo methods and applications to spin systems

    International Nuclear Information System (INIS)

    Suzuki, M.

    1986-01-01

    A short review is given concerning the quantum statistical Monte Carlo method based on the equivalence theorem that d-dimensional quantum systems are mapped onto (d+1)-dimensional classical systems. The convergence property of this approximate tansformation is discussed in detail. Some applications of this general appoach to quantum spin systems are reviewed. A new Monte Carlo method, ''thermo field Monte Carlo method,'' is presented, which is an extension of the projection Monte Carlo method at zero temperature to that at finite temperatures

  18. Variational Variance Reduction for Monte Carlo Criticality Calculations

    International Nuclear Information System (INIS)

    Densmore, Jeffery D.; Larsen, Edward W.

    2001-01-01

    A new variational variance reduction (VVR) method for Monte Carlo criticality calculations was developed. This method employs (a) a variational functional that is more accurate than the standard direct functional, (b) a representation of the deterministically obtained adjoint flux that is especially accurate for optically thick problems with high scattering ratios, and (c) estimates of the forward flux obtained by Monte Carlo. The VVR method requires no nonanalog Monte Carlo biasing, but it may be used in conjunction with Monte Carlo biasing schemes. Some results are presented from a class of criticality calculations involving alternating arrays of fuel and moderator regions

  19. Applications of the Monte Carlo method in radiation protection

    International Nuclear Information System (INIS)

    Kulkarni, R.N.; Prasad, M.A.

    1999-01-01

    This paper gives a brief introduction to the application of the Monte Carlo method in radiation protection. It may be noted that an exhaustive review has not been attempted. The special advantage of the Monte Carlo method has been first brought out. The fundamentals of the Monte Carlo method have next been explained in brief, with special reference to two applications in radiation protection. Some sample current applications have been reported in the end in brief as examples. They are, medical radiation physics, microdosimetry, calculations of thermoluminescence intensity and probabilistic safety analysis. The limitations of the Monte Carlo method have also been mentioned in passing. (author)

  20. Multi-Index Monte Carlo (MIMC)

    KAUST Repository

    Haji Ali, Abdul Lateef

    2016-01-06

    We propose and analyze a novel Multi-Index Monte Carlo (MIMC) method for weak approximation of stochastic models that are described in terms of differential equations either driven by random measures or with random coefficients. The MIMC method is both a stochastic version of the combination technique introduced by Zenger, Griebel and collaborators and an extension of the Multilevel Monte Carlo (MLMC) method first described by Heinrich and Giles. Inspired by Giles s seminal work, instead of using first-order differences as in MLMC, we use in MIMC high-order mixed differences to reduce the variance of the hierarchical differences dramatically. Under standard assumptions on the convergence rates of the weak error, variance and work per sample, the optimal index set turns out to be of Total Degree (TD) type. When using such sets, MIMC yields new and improved complexity results, which are natural generalizations of Giles s MLMC analysis, and which increase the domain of problem parameters for which we achieve the optimal convergence, O(TOL-2).

  1. Multi-Index Monte Carlo (MIMC)

    KAUST Repository

    Haji Ali, Abdul Lateef; Nobile, Fabio; Tempone, Raul

    2016-01-01

    We propose and analyze a novel Multi-Index Monte Carlo (MIMC) method for weak approximation of stochastic models that are described in terms of differential equations either driven by random measures or with random coefficients. The MIMC method is both a stochastic version of the combination technique introduced by Zenger, Griebel and collaborators and an extension of the Multilevel Monte Carlo (MLMC) method first described by Heinrich and Giles. Inspired by Giles s seminal work, instead of using first-order differences as in MLMC, we use in MIMC high-order mixed differences to reduce the variance of the hierarchical differences dramatically. Under standard assumptions on the convergence rates of the weak error, variance and work per sample, the optimal index set turns out to be of Total Degree (TD) type. When using such sets, MIMC yields new and improved complexity results, which are natural generalizations of Giles s MLMC analysis, and which increase the domain of problem parameters for which we achieve the optimal convergence, O(TOL-2).

  2. Multi-Index Monte Carlo (MIMC)

    KAUST Repository

    Haji Ali, Abdul Lateef; Nobile, Fabio; Tempone, Raul

    2015-01-01

    We propose and analyze a novel Multi-Index Monte Carlo (MIMC) method for weak approximation of stochastic models that are described in terms of differential equations either driven by random measures or with random coefficients. The MIMC method is both a stochastic version of the combination technique introduced by Zenger, Griebel and collaborators and an extension of the Multilevel Monte Carlo (MLMC) method first described by Heinrich and Giles. Inspired by Giles’s seminal work, instead of using first-order differences as in MLMC, we use in MIMC high-order mixed differences to reduce the variance of the hierarchical differences dramatically. Under standard assumptions on the convergence rates of the weak error, variance and work per sample, the optimal index set turns out to be of Total Degree (TD) type. When using such sets, MIMC yields new and improved complexity results, which are natural generalizations of Giles’s MLMC analysis, and which increase the domain of problem parameters for which we achieve the optimal convergence.

  3. Self-test Monte Carlo method

    International Nuclear Information System (INIS)

    Ohta, Shigemi

    1996-01-01

    The Self-Test Monte Carlo (STMC) method resolves the main problems in using algebraic pseudo-random numbers for Monte Carlo (MC) calculations: that they can interfere with MC algorithms and lead to erroneous results, and that such an error often cannot be detected without known exact solution. STMC is based on good randomness of about 10 10 bits available from physical noise or transcendental numbers like π = 3.14---. Various bit modifiers are available to get more bits for applications that demands more than 10 10 random bits such as lattice quantum chromodynamics (QCD). These modifiers are designed so that a) each of them gives a bit sequence comparable in randomness as the original if used separately from each other, and b) their mutual interference when used jointly in a single MC calculation is adjustable. Intermediate data of the MC calculation itself are used to quantitatively test and adjust the mutual interference of the modifiers in respect of the MC algorithm. STMC is free of systematic error and gives reliable statistical error. Also it can be easily implemented on vector and parallel supercomputers. (author)

  4. Algorithms for Monte Carlo calculations with fermions

    International Nuclear Information System (INIS)

    Weingarten, D.

    1985-01-01

    We describe a fermion Monte Carlo algorithm due to Petcher and the present author and another due to Fucito, Marinari, Parisi and Rebbi. For the first algorithm we estimate the number of arithmetic operations required to evaluate a vacuum expectation value grows as N 11 /msub(q) on an N 4 lattice with fixed periodicity in physical units and renormalized quark mass msub(q). For the second algorithm the rate of growth is estimated to be N 8 /msub(q) 2 . Numerical experiments are presented comparing the two algorithms on a lattice of size 2 4 . With a hopping constant K of 0.15 and β of 4.0 we find the number of operations for the second algorithm is about 2.7 times larger than for the first and about 13 000 times larger than for corresponding Monte Carlo calculations with a pure gauge theory. An estimate is given for the number of operations required for more realistic calculations by each algorithm on a larger lattice. (orig.)

  5. Quantum Monte Carlo for atoms and molecules

    International Nuclear Information System (INIS)

    Barnett, R.N.

    1989-11-01

    The diffusion quantum Monte Carlo with fixed nodes (QMC) approach has been employed in studying energy-eigenstates for 1--4 electron systems. Previous work employing the diffusion QMC technique yielded energies of high quality for H 2 , LiH, Li 2 , and H 2 O. Here, the range of calculations with this new approach has been extended to include additional first-row atoms and molecules. In addition, improvements in the previously computed fixed-node energies of LiH, Li 2 , and H 2 O have been obtained using more accurate trial functions. All computations were performed within, but are not limited to, the Born-Oppenheimer approximation. In our computations, the effects of variation of Monte Carlo parameters on the QMC solution of the Schroedinger equation were studied extensively. These parameters include the time step, renormalization time and nodal structure. These studies have been very useful in determining which choices of such parameters will yield accurate QMC energies most efficiently. Generally, very accurate energies (90--100% of the correlation energy is obtained) have been computed with single-determinant trail functions multiplied by simple correlation functions. Improvements in accuracy should be readily obtained using more complex trial functions

  6. Monte Carlo simulation of grain growth

    Directory of Open Access Journals (Sweden)

    Paulo Blikstein

    1999-07-01

    Full Text Available Understanding and predicting grain growth in Metallurgy is meaningful. Monte Carlo methods have been used in computer simulations in many different fields of knowledge. Grain growth simulation using this method is especially attractive as the statistical behavior of the atoms is properly reproduced; microstructural evolution depends only on the real topology of the grains and not on any kind of geometric simplification. Computer simulation has the advantage of allowing the user to visualize graphically the procedures, even dynamically and in three dimensions. Single-phase alloy grain growth simulation was carried out by calculating the free energy of each atom in the lattice (with its present crystallographic orientation and comparing this value to another one calculated with a different random orientation. When the resulting free energy is lower or equal to the initial value, the new orientation replaces the former. The measure of time is the Monte Carlo Step (MCS, which involves a series of trials throughout the lattice. A very close relationship between experimental and theoretical values for the grain growth exponent (n was observed.

  7. Multi-Index Monte Carlo (MIMC)

    KAUST Repository

    Haji Ali, Abdul Lateef

    2015-01-07

    We propose and analyze a novel Multi-Index Monte Carlo (MIMC) method for weak approximation of stochastic models that are described in terms of differential equations either driven by random measures or with random coefficients. The MIMC method is both a stochastic version of the combination technique introduced by Zenger, Griebel and collaborators and an extension of the Multilevel Monte Carlo (MLMC) method first described by Heinrich and Giles. Inspired by Giles’s seminal work, instead of using first-order differences as in MLMC, we use in MIMC high-order mixed differences to reduce the variance of the hierarchical differences dramatically. Under standard assumptions on the convergence rates of the weak error, variance and work per sample, the optimal index set turns out to be of Total Degree (TD) type. When using such sets, MIMC yields new and improved complexity results, which are natural generalizations of Giles’s MLMC analysis, and which increase the domain of problem parameters for which we achieve the optimal convergence.

  8. Parallel Monte Carlo Search for Hough Transform

    Science.gov (United States)

    Lopes, Raul H. C.; Franqueira, Virginia N. L.; Reid, Ivan D.; Hobson, Peter R.

    2017-10-01

    We investigate the problem of line detection in digital image processing and in special how state of the art algorithms behave in the presence of noise and whether CPU efficiency can be improved by the combination of a Monte Carlo Tree Search, hierarchical space decomposition, and parallel computing. The starting point of the investigation is the method introduced in 1962 by Paul Hough for detecting lines in binary images. Extended in the 1970s to the detection of space forms, what came to be known as Hough Transform (HT) has been proposed, for example, in the context of track fitting in the LHC ATLAS and CMS projects. The Hough Transform transfers the problem of line detection, for example, into one of optimization of the peak in a vote counting process for cells which contain the possible points of candidate lines. The detection algorithm can be computationally expensive both in the demands made upon the processor and on memory. Additionally, it can have a reduced effectiveness in detection in the presence of noise. Our first contribution consists in an evaluation of the use of a variation of the Radon Transform as a form of improving theeffectiveness of line detection in the presence of noise. Then, parallel algorithms for variations of the Hough Transform and the Radon Transform for line detection are introduced. An algorithm for Parallel Monte Carlo Search applied to line detection is also introduced. Their algorithmic complexities are discussed. Finally, implementations on multi-GPU and multicore architectures are discussed.

  9. Monte Carlo simulation for radiographic applications

    International Nuclear Information System (INIS)

    Tillack, G.R.; Bellon, C.

    2003-01-01

    Standard radiography simulators are based on the attenuation law complemented by built-up-factors (BUF) to describe the interaction of radiation with material. The assumption of BUF implies that scattered radiation reduces only the contrast in radiographic images. This simplification holds for a wide range of applications like weld inspection as known from practical experience. But only a detailed description of the different underlying interaction mechanisms is capable to explain effects like mottling or others that every radiographer has experienced in practice. The application of Monte Carlo models is capable to handle primary and secondary interaction mechanisms contributing to the image formation process like photon interactions (absorption, incoherent and coherent scattering including electron-binding effects, pair production) and electron interactions (electron tracing including X-Ray fluorescence and Bremsstrahlung production). It opens up possibilities like the separation of influencing factors and the understanding of the functioning of intensifying screen used in film radiography. The paper discusses the opportunities in applying the Monte Carlo method to investigate special features in radiography in terms of selected examples. (orig.) [de

  10. Reactor perturbation calculations by Monte Carlo methods

    International Nuclear Information System (INIS)

    Gubbins, M.E.

    1965-09-01

    Whilst Monte Carlo methods are useful for reactor calculations involving complicated geometry, it is difficult to apply them to the calculation of perturbation worths because of the large amount of computing time needed to obtain good accuracy. Various ways of overcoming these difficulties are investigated in this report, with the problem of estimating absorbing control rod worths particularly in mind. As a basis for discussion a method of carrying out multigroup reactor calculations by Monte Carlo methods is described. Two methods of estimating a perturbation worth directly, without differencing two quantities of like magnitude, are examined closely but are passed over in favour of a third method based on a correlation technique. This correlation method is described, and demonstrated by a limited range of calculations for absorbing control rods in a fast reactor. In these calculations control rod worths of between 1% and 7% in reactivity are estimated to an accuracy better than 10% (3 standard errors) in about one hour's computing time on the English Electric KDF.9 digital computer. (author)

  11. US patterns of the diaphragmatic crura. Normal anatomy and its variants; Aspetti ecografici dei pilastri diaframmatici. Anatomia normale e sue varianti

    Energy Technology Data Exchange (ETDEWEB)

    Crespi, G.; Martinoli, C.; Cicio, G.R. [Genua Univ., Genua (Italy). Cattedra R di Radiologia DICMI; Zappasodi, F. [Sobborgo Valzania, Cesena, FO (Italy); Valle, M. [Istituto Gaslini, Genua (Italy). Servizio di Radiologia

    2000-06-01

    scans, ranged 3-10 mm in deep inspiration and 1-4 mm in expiration while the left crus was 3-6 mm in inspiration and 1-2 mm in expiration. The length of the right crus, studied in the preaortic portion, ranged form 7 mm in deep inspiration to 9.7 cm in expiration while the left one was 6.5 to 8.8 cm. The right lateral diaphragmatic bundles were seen in 28 subjects only on repeated subcostal oblique scans and the left ones in 11 subjects only. Finally the thin anterior bundles were shown on parasagittal images in 13 cases in the right side and in 2 in the left. A 2-band appearance of the diaphragm was seen 10 patients with pleural effusion and in 8 patients with associated ascites. A single band was found only in the tendinous portion of the diaphragm. US is presently considered the imaging method of choice in the assessment of changes in thickness and length of the diaphragmatic crura. These structures have different US patterns and can sometimes appear quite bulky and thus be easily mistaken for other anatomic or abnormal structures; orthogonal scans may be required for the differential diagnosis. [Italian] Scopo di questo lavoro e' quello di analizzare mediante ecografia, la differente morfologia dei fasci muscolari del diaframma in diverse scansioni e con il variare degli atti respiratori, tenendo conto dell'ampia variabilita' individuale che queste strutture possono presentare. In condizioni normali l'aspetto ecografico del diaframma e' duplice; la porzione tendinea centrale appare come una linea iperecogena, la parte muscolare periferica e' caratterizzata da strutture allungate che assumono morfologia trilaminare nel punto di maggiore spessore. Talvolta lungo il decorso dei pilastri diaframmatici possono presentarsi nodulazioni, reperto che va correttamente identificato al fine di evitare errori interpretativi. Il lavoro e' stato suddiviso in tre parti. Prima si sono esaminate retrospettivamente le immagini di 23 soggetti che

  12. Material flow evaluation procedure for an integrated system in an optimal territorial range; Procedura per la valutazione dei flussi di materia di un sistema integrato in un ambito territoriale ottimale

    Energy Technology Data Exchange (ETDEWEB)

    Florio, G.; Giordano, R.; Greco, G.; Prete, C. [Arcavacata di Rende Univ. della Calabria, Arcavacata di Rende, CS (Italy). Dipt. di Meccanica

    2000-06-01

    The procedure illustrated in this paper defines the parameters to be considered for a credible temporal estimate Solid Urban Waste, the object of disposal in a generic Integrated System. Application to an Optima Territorial Range of the Calabria region allowed the attainable results that make up the starting datum to plan the main subsystems involved to be pointed out. Moreover, the strategic role of the objectives of Differentiated Collection and their temporal trend is confirmed. [Italian] La procedura illustrata nel presente lavoro definisce i parametri da considerare per una stima attendibile nel tempo dei RSU (Rifiuti Solidi Urbani) oggetto di smaltimento in un generico Sistema Integrato. L'applicazione ad un Ambito Territoriale Ottimale della Regione Calabria ha permesso di evidenziare i risultati ottenibili che costituiscono il dato di partenza per il dimensionamento dei principali sottosistemi coinvolti. E' inoltre confermato il ruolo strategico degli obiettivi di Raccolta Differenziata e dal loro andamento temporale.

  13. Indice per la valutazione della qualità ecologica dei bacini artificiali mediterranei (MedPTI) a partire dalla composizione del fitoplancton: documento presentato al Ministero dell’Ambiente e della tutela del territorio e del mare

    OpenAIRE

    Marchetto, Aldo; Lugliè, Antonella Gesuina Laura; Padedda, Bachisio Mario; Mariani, Maria Antonietta

    2007-01-01

    Secondo la Direttiva 2000/60/CE (WFD, Water Framework Directive), la valutazione della qualità ecologica dei corpi idrici deve essere ottenuta con l’uso di indici numerici costruiti a partire dai parametri biologici, confrontando il valore assunto nel sito in esame con quello di un sito di riferimento, attraverso il calcolo di un quoziente di qualità ecologica (Ecological quality ratio, EQR). L’indice qui proposto è stato sottoposto alla procedura di intercalibrazione, per otte...

  14. La riforma della società per azioni nel pensiero di Sylos Labini e dei suoi contemporanei (Corporate Law Reform in Sylos Labini’s Thought and His Contemporaries’

    Directory of Open Access Journals (Sweden)

    Mario Stella Richter

    2016-07-01

    Full Text Available The article describes corporate law in Italy in the Postwar period, as viewed by Paolo Sylos Labini and Tullio Ascarelli.This is the revised version of a speech given at the conference "Paolo Sylos Labini e la politica delle riforme", held at Sapienza University of Rome on 04 December 2015, organized by the Accademia dei Lincei and Economia civile.JEL code: B31; K21; K23

  15. Flow and suspended sediment yield monitoring of the Apennines' watershed of the Sillaro stream (Prov. BO). 1998 Data analysis; Monitoraggio del deflusso liquido e solido del tratto appenninico del T. Sillaro. Analisi dei dati del 1998

    Energy Technology Data Exchange (ETDEWEB)

    Pavanelli, D.; Taglioli, G. [Bologna Univ., Bologna (Italy). Dipt. Economia e Ingegneria Agrarie; Sarti, A.

    2000-07-01

    The accurate assessment of surface water erosion in watershed is aided by the indications provided by the yield of fluvial solids and in particular by suspended sediment yield. Confining itself to a research study of hydrological and erosion phenomena present at the mountain watershed of the Sillaro Torrent, a monitoring station of water flow and sediment yield was set up at the enclosed end of the mountain basin. This paper contains the presentation and evaluation of the statistics revealed during the course of 1998. The fluctuation of sediment yield appears to be connected to the variation of water flow, the annual soil loss has been assessed at 54446 t, equal to an average soil loss over the entire basin of 0.26 mm. [Italian] La stima diretta dell'erosione idrica superficiale a scala di bacino idrografico puo' avvalersi delle indicazioni fornite dal trasporto solido fluviale, ed in particolare dal trasporto in sospensione. Nell'ambito di una ricerca volta allo studio dei fenomeni idrologici ed erosivi a carico del bacino montano del T. Sillaro (prov. BO), e' stata realizzata, presso la sezione di chiusa del bacino, una stazione di misura per il monitoraggio dei deflussi liquidi e della torbida. Nella presente nota viene fornita la descrizione e la valutazione dei dati rilevati nel corso del 1998. Le fluttuazioni dei valori di trasporto torbido appaiono legate alle variazioni di portata, mentre il deflusso torbido annuo per il 1998 e' stato valutato in 54.446, pari ad una perdita annua media di suolo sull'intero bacino di 0.26 mm.

  16. Plastica Dei et rhétorique du corps. Écritures de l’apparence au Moyen Âge (XIIe-XIIIe siècles

    Directory of Open Access Journals (Sweden)

    Carlos F. Clamote Carreto

    2008-08-01

    Full Text Available Résumé : (Dé voilant les sept arts libéraux sous les traits emblématiques de dames dont les corps élégants et séducteurs sont parés de somptueux vêtements ornés de toutes les figures et couleurs de style, le fameux traité de Martianus Capella, Les noces de Philologie et de Mercure, qui fixera pour plusieurs siècles à venir le concept de littérature et toutes les formes du savoir clérical ancrées dans l’art de la lettre, assume sans ambages la défense du plasma fictionnelle contre l’empire de la plastica Dei dont Tertullien s’était fait, quelques siècles auparavant, le plus virulent des avocats. Cette déchirure épistémologique, renforcée par l’ambivalence inhérente à la conception du corps et de la parure dans la tradition biblique et exégétique, marquera définitivement les contours du récit médiéval et la conception même de l’apparence et du paraître dans l’Occident médiéval. L’imaginaire courtois développe ainsi une sémiologie complexe où les ornements qui recouvrent à profusion la surface du corps, lui assignant (ou refusant une place dans la société et dans la vaste syntaxe du monde, sont autant de métaphores reluisantes et trompeuses de l’ornatus rhétorique sur lesquelles s’appuiera, au fil des textes, toute une réflexion sur le langage poétique et le pouvoir de la représentation.Abstract : Plastica Dei and the Rhetoric of Body. Writings of Appearance in the Middle Ages (12th -13th CenturiesRevealing the Seven Liberal Arts through the emblematic features of ladies whose elegant, seductive bodies are covered with sumptuous clothes, adorned with all the figures and colours of style, the famous work by Martianus Capella, The marriage of Philology and Mercury - which will establish, for many centuries to come, the concept of literature as well as all the other forms of clerical knowledge anchored on the art of the letter- assumes clearly the defence of the fictional plasma vis

  17. Selection of important Monte Carlo histories

    International Nuclear Information System (INIS)

    Egbert, Stephen D.

    1987-01-01

    The 1986 Dosimetry System (DS86) for Japanese A-bomb survivors uses information describing the behavior of individual radiation particles, simulated by Monte Carlo methods, to calculate the transmission of radiation into structures and, thence, into humans. However, there are practical constraints on the number of such particle 'histories' that may be used. First, the number must be sufficiently high to provide adequate statistical precision fir any calculated quantity of interest. For integral quantities, such as dose or kerma, statistical precision of approximately 5% (standard deviation) is required to ensure that statistical uncertainties are not a major contributor to the overall uncertainty of the transmitted value. For differential quantities, such as scalar fluence spectra, 10 to 15% standard deviation on individual energy groups is adequate. Second, the number of histories cannot be so large as to require an unacceptably large amount of computer time to process the entire survivor data base. Given that there are approx. 30,000 survivors, each having 13 or 14 organs of interest, the number of histories per organ must be constrained to less than several ten's of thousands at the very most. Selection and use of the most important Monte Carlo leakage histories from among all those calculated allows the creation of an efficient house and organ radiation transmission system for use at RERF. While attempts have been made during the adjoint Monte Carlo calculation to bias the histories toward an efficient dose estimate, this effort has been far from satisfactory. Many of the adjoint histories on a typical leakage tape are either starting in an energy group in which there is very little kerma or dose or leaking into an energy group with very little free-field couple with. By knowing the typical free-field fluence and the fluence-to-dose factors with which the leaking histories will be used, one can select histories rom a leakage tape that will contribute to dose

  18. Il Registro della confraternità dei pellicciai di Udine. A cura di Federico Vicario. Biblioteca di Lingua e Letteratura friulana, 4. - Forum, Editrice Universitaria Udinese, Udine 2003; pp. 204

    Directory of Open Access Journals (Sweden)

    Mitja Skubic

    2004-12-01

    Full Text Available L'edizione, in una veste tecnicamente impeccabile, ha come scopo principale quello di presentare i1 registro di una importante confraternita udinese del tardo Medioevo, quella dei pellicciai. In questo ambiente climatico tale mestiere deve esse­ re stato importante; e vedrei una prova nel fatto che viene menzionato, a parte gli beçars - macelatores (es. 42, l'unico, negli Esercizi di versione dal volgare friulano in latino nel sec. XIV in una scuola notarile cividalese dove si legge: L'ager gait, qual è d'estat, fas spargna lis pliçis, chosa ricrisint agl piliças. Ager calidus, qualis est in estate, facit parsimonucare renones, re cuius tedet pelixarios, (es. 40. Il curatore della pubbli­ cazione del Registro, Federico Vicario, vanta già una decina di pubblicazi.oni di testi analoghi e con l'attuale ha aggiunto un ulteriore testo prezioso per la nostra cono­ scenza del friulano antico. Il Registro è l'elenco dei censuari, però, oltre ad essere un documento della vita e dei rapporti sociali del Tre- e Quattrocento, offre un quadro linguistico del friulano in un'epoca in cui la letteratura vera e propria in friulano offre  poco.

  19. Thermal interactions of the AD79 Vesuvius pyroclastic density currents and their deposits at Villa dei Papiri (Herculaneum archaeological site, Italy)

    Science.gov (United States)

    Giordano, G.; Zanella, E.; Trolese, M.; Baffioni, C.; Vona, A.; Caricchi, C.; De Benedetti, A. A.; Corrado, S.; Romano, C.; Sulpizio, R.; Geshi, N.

    2018-05-01

    Pyroclastic density currents (PDCs) can have devastating impacts on urban settlements, due to their dynamic pressure and high temperatures. Our degree of understanding of the interplay between these hot currents and the affected infrastructures is thus fundamental not only to implement our strategies for risk reduction, but also to better understand PDC dynamics. We studied the temperature of emplacement of PDC deposits that destroyed and buried the Villa dei Papiri, an aristocratic Roman edifice located just outside the Herculaneum city, during the AD79 plinian eruption of Mt Vesuvius (Italy) by using the thermal remanent magnetization of embedded lithic clasts. The PDC deposits around and inside the Villa show substantial internal thermal disequilibrium. In areas affected by convective mixing with surface water or with collapsed walls, temperatures average at around 270 °C (min 190 °C, max 300 °C). Where the deposits show no evidence of mixing with external material, the temperature is much higher, averaging at 350 °C (min 300 °C; max 440 °C). Numerical simulations and comparison with temperatures retrieved at the very same sites from the reflectance of charcoal fragments indicate that such thermal disequilibrium can be maintained inside the PDC deposit for time-scales well over 24 hours, i.e. the acquisition time of deposit temperatures for common proxies. We reconstructed in detail the history of the progressive destruction and burial of Villa dei Papiri and infer that the rather homogeneous highest deposit temperatures (average 350 °C) were carried by the ash-sized fraction in thermal equilibrium with the fluid phase of the incoming PDCs. These temperatures can be lowered on short time- (less than hours) and length-scales (meters to tens of meters) only where convective mixing with external materials or fluids occurs. By contrast, where the Villa walls remained standing the thermal exchange was only conductive and very slow, i.e. negligible at 50 cm

  20. The insecticide lindane. Identification of possible risks for human reproduction; L'insetticida lindano. Identificazione dei rischi possibili per la riproduzione umana

    Energy Technology Data Exchange (ETDEWEB)

    Traina, M E; Urbani, E [Istituto Superiore di Sanita' , Lab. di Igiene Ambientale, Rome (Italy); Rescia, M; Mantovani, A [Istituto Superiore di Sanita' , Lab. di Tossicologia Comparata e Ecotossicologia, Rome (Italy)

    2001-07-01

    effettata una revisione critica della letteratura scientifica sugli effetti di questo principio attivo sul sistema riproduttivo maschile e femminile, sulla gravidanza e sullo sviluppo. Attraverso un'analisi del consumo di prodotti a base di lindano e una valutazione dei livelli di questo principio attivo nell'ambiente e nei liquidi e tessuti biologi, con particolare riguardo alla situazione italiana, sono stati definiti i possibili periodi di maggiore esposizione (anni 1960-70) a quest'insetticida. Il presente rapporto intende costituire uno strumento di lavoro per chi compie studi di tossicologia sperimentale e di epidemiologia, per la prevenzione dei rischi riproduttivi negli ambienti di vita e di lavoro.

  1. The insecticide lindane. Identification of possible risks for human reproduction; L'insetticida lindano. Identificazione dei rischi possibili per la riproduzione umana

    Energy Technology Data Exchange (ETDEWEB)

    Traina, M.E.; Urbani, E. [Istituto Superiore di Sanita' , Lab. di Igiene Ambientale, Rome (Italy); Rescia, M.; Mantovani, A. [Istituto Superiore di Sanita' , Lab. di Tossicologia Comparata e Ecotossicologia, Rome (Italy)

    2001-07-01

    riproduttivo a lungo termine. In questa rassegna e' stata pertanto effettata una revisione critica della letteratura scientifica sugli effetti di questo principio attivo sul sistema riproduttivo maschile e femminile, sulla gravidanza e sullo sviluppo. Attraverso un'analisi del consumo di prodotti a base di lindano e una valutazione dei livelli di questo principio attivo nell'ambiente e nei liquidi e tessuti biologi, con particolare riguardo alla situazione italiana, sono stati definiti i possibili periodi di maggiore esposizione (anni 1960-70) a quest'insetticida. Il presente rapporto intende costituire uno strumento di lavoro per chi compie studi di tossicologia sperimentale e di epidemiologia, per la prevenzione dei rischi riproduttivi negli ambienti di vita e di lavoro.

  2. Response decomposition with Monte Carlo correlated coupling

    International Nuclear Information System (INIS)

    Ueki, T.; Hoogenboom, J.E.; Kloosterman, J.L.

    2001-01-01

    Particle histories that contribute to a detector response are categorized according to whether they are fully confined inside a source-detector enclosure or cross and recross the same enclosure. The contribution from the confined histories is expressed using a forward problem with the external boundary condition on the source-detector enclosure. The contribution from the crossing and recrossing histories is expressed as the surface integral at the same enclosure of the product of the directional cosine and the fluxes in the foregoing forward problem and the adjoint problem for the whole spatial domain. The former contribution can be calculated by a standard forward Monte Carlo. The latter contribution can be calculated by correlated coupling of forward and adjoint histories independently of the former contribution. We briefly describe the computational method and discuss its application to perturbation analysis for localized material changes. (orig.)

  3. Response decomposition with Monte Carlo correlated coupling

    Energy Technology Data Exchange (ETDEWEB)

    Ueki, T.; Hoogenboom, J.E.; Kloosterman, J.L. [Delft Univ. of Technology (Netherlands). Interfaculty Reactor Inst.

    2001-07-01

    Particle histories that contribute to a detector response are categorized according to whether they are fully confined inside a source-detector enclosure or cross and recross the same enclosure. The contribution from the confined histories is expressed using a forward problem with the external boundary condition on the source-detector enclosure. The contribution from the crossing and recrossing histories is expressed as the surface integral at the same enclosure of the product of the directional cosine and the fluxes in the foregoing forward problem and the adjoint problem for the whole spatial domain. The former contribution can be calculated by a standard forward Monte Carlo. The latter contribution can be calculated by correlated coupling of forward and adjoint histories independently of the former contribution. We briefly describe the computational method and discuss its application to perturbation analysis for localized material changes. (orig.)

  4. Monte Carlo simulations of low background detectors

    International Nuclear Information System (INIS)

    Miley, H.S.; Brodzinski, R.L.; Hensley, W.K.; Reeves, J.H.

    1995-01-01

    An implementation of the Electron Gamma Shower 4 code (EGS4) has been developed to allow convenient simulation of typical gamma ray measurement systems. Coincidence gamma rays, beta spectra, and angular correlations have been added to adequately simulate a complete nuclear decay and provide corrections to experimentally determined detector efficiencies. This code has been used to strip certain low-background spectra for the purpose of extremely low-level assay. Monte Carlo calculations of this sort can be extremely successful since low background detectors are usually free of significant contributions from poorly localized radiation sources, such as cosmic muons, secondary cosmic neutrons, and radioactive construction or shielding materials. Previously, validation of this code has been obtained from a series of comparisons between measurements and blind calculations. An example of the application of this code to an exceedingly low background spectrum stripping will be presented. (author) 5 refs.; 3 figs.; 1 tab

  5. Homogenized group cross sections by Monte Carlo

    International Nuclear Information System (INIS)

    Van Der Marck, S. C.; Kuijper, J. C.; Oppe, J.

    2006-01-01

    Homogenized group cross sections play a large role in making reactor calculations efficient. Because of this significance, many codes exist that can calculate these cross sections based on certain assumptions. However, the application to the High Flux Reactor (HFR) in Petten, the Netherlands, the limitations of such codes imply that the core calculations would become less accurate when using homogenized group cross sections (HGCS). Therefore we developed a method to calculate HGCS based on a Monte Carlo program, for which we chose MCNP. The implementation involves an addition to MCNP, and a set of small executables to perform suitable averaging after the MCNP run(s) have completed. Here we briefly describe the details of the method, and we report on two tests we performed to show the accuracy of the method and its implementation. By now, this method is routinely used in preparation of the cycle to cycle core calculations for HFR. (authors)

  6. Nuclear reactions in Monte Carlo codes

    CERN Document Server

    Ferrari, Alfredo

    2002-01-01

    The physics foundations of hadronic interactions as implemented in most Monte Carlo codes are presented together with a few practical examples. The description of the relevant physics is presented schematically split into the major steps in order to stress the different approaches required for the full understanding of nuclear reactions at intermediate and high energies. Due to the complexity of the problem, only a few semi-qualitative arguments are developed in this paper. The description will be necessarily schematic and somewhat incomplete, but hopefully it will be useful for a first introduction into this topic. Examples are shown mostly for the high energy regime, where all mechanisms mentioned in the paper are at work and to which perhaps most of the readers are less accustomed. Examples for lower energies can be found in the references. (43 refs) .

  7. Angular biasing in implicit Monte-Carlo

    International Nuclear Information System (INIS)

    Zimmerman, G.B.

    1994-01-01

    Calculations of indirect drive Inertial Confinement Fusion target experiments require an integrated approach in which laser irradiation and radiation transport in the hohlraum are solved simultaneously with the symmetry, implosion and burn of the fuel capsule. The Implicit Monte Carlo method has proved to be a valuable tool for the two dimensional radiation transport within the hohlraum, but the impact of statistical noise on the symmetric implosion of the small fuel capsule is difficult to overcome. We present an angular biasing technique in which an increased number of low weight photons are directed at the imploding capsule. For typical parameters this reduces the required computer time for an integrated calculation by a factor of 10. An additional factor of 5 can also be achieved by directing even smaller weight photons at the polar regions of the capsule where small mass zones are most sensitive to statistical noise

  8. An accurate nonlinear Monte Carlo collision operator

    International Nuclear Information System (INIS)

    Wang, W.X.; Okamoto, M.; Nakajima, N.; Murakami, S.

    1995-03-01

    A three dimensional nonlinear Monte Carlo collision model is developed based on Coulomb binary collisions with the emphasis both on the accuracy and implementation efficiency. The operator of simple form fulfills particle number, momentum and energy conservation laws, and is equivalent to exact Fokker-Planck operator by correctly reproducing the friction coefficient and diffusion tensor, in addition, can effectively assure small-angle collisions with a binary scattering angle distributed in a limited range near zero. Two highly vectorizable algorithms are designed for its fast implementation. Various test simulations regarding relaxation processes, electrical conductivity, etc. are carried out in velocity space. The test results, which is in good agreement with theory, and timing results on vector computers show that it is practically applicable. The operator may be used for accurately simulating collisional transport problems in magnetized and unmagnetized plasmas. (author)

  9. Computation cluster for Monte Carlo calculations

    International Nuclear Information System (INIS)

    Petriska, M.; Vitazek, K.; Farkas, G.; Stacho, M.; Michalek, S.

    2010-01-01

    Two computation clusters based on Rocks Clusters 5.1 Linux distribution with Intel Core Duo and Intel Core Quad based computers were made at the Department of the Nuclear Physics and Technology. Clusters were used for Monte Carlo calculations, specifically for MCNP calculations applied in Nuclear reactor core simulations. Optimization for computation speed was made on hardware and software basis. Hardware cluster parameters, such as size of the memory, network speed, CPU speed, number of processors per computation, number of processors in one computer were tested for shortening the calculation time. For software optimization, different Fortran compilers, MPI implementations and CPU multi-core libraries were tested. Finally computer cluster was used in finding the weighting functions of neutron ex-core detectors of VVER-440. (authors)

  10. Monte Carlo stratified source-sampling

    International Nuclear Information System (INIS)

    Blomquist, R.N.; Gelbard, E.M.

    1997-01-01

    In 1995, at a conference on criticality safety, a special session was devoted to the Monte Carlo open-quotes eigenvalue of the worldclose quotes problem. Argonne presented a paper, at that session, in which the anomalies originally observed in that problem were reproduced in a much simplified model-problem configuration, and removed by a version of stratified source-sampling. The original test-problem was treated by a special code designed specifically for that purpose. Recently ANL started work on a method for dealing with more realistic eigenvalue of the world configurations, and has been incorporating this method into VIM. The original method has been modified to take into account real-world statistical noise sources not included in the model problem. This paper constitutes a status report on work still in progress

  11. Helminthiases in Montes Claros. Preliminary survey

    Directory of Open Access Journals (Sweden)

    Rina Girard Kaminsky

    1976-04-01

    Full Text Available A preliminary survey was conducted for the presence of helminths in the city of Montes Claros, M. G., Brazil. Three groups of persons were examined by the direct smear, Kato thick film and MIFC techniques; one group by direct smear and Kato only. General findings were: a high prevalence of hookworm, followed by ascariasis, S. mansoni, S. stercoralis and very light infections with T. trichiurá. E. vermicularis and H. nana were ranking parasites at an orphanage, with some hookworm and S. mansoni infections as well. At a pig slaughter house, the dominant parasites were hookworm and S. mansoni. Pig cysticercosis was an incidental finding worth mentioning for the health hazard it represents for humans as well as an economic loss. From the comparative results between the Kato and the MIF the former proved itself again as a more sensitive and reliable concentration method for helminth eggs, of low cost and easy performance.

  12. Monte Carlo simulation of a CZT detector

    International Nuclear Information System (INIS)

    Chun, Sung Dae; Park, Se Hwan; Ha, Jang Ho; Kim, Han Soo; Cho, Yoon Ho; Kang, Sang Mook; Kim, Yong Kyun; Hong, Duk Geun

    2008-01-01

    CZT detector is one of the most promising radiation detectors for hard X-ray and γ-ray measurement. The energy spectrum of CZT detector has to be simulated to optimize the detector design. A CZT detector was fabricated with dimensions of 5x5x2 mm 3 . A Peltier cooler with a size of 40x40 mm 2 was installed below the fabricated CZT detector to reduce the operation temperature of the detector. Energy spectra of were measured with 59.5 keV γ-ray from 241 Am. A Monte Carlo code was developed to simulate the CZT energy spectrum, which was measured with a planar-type CZT detector, and the result was compared with the measured one. The simulation was extended to the CZT detector with strip electrodes. (author)

  13. Vectorization of Monte Carlo particle transport

    International Nuclear Information System (INIS)

    Burns, P.J.; Christon, M.; Schweitzer, R.; Lubeck, O.M.; Wasserman, H.J.; Simmons, M.L.; Pryor, D.V.

    1989-01-01

    This paper reports that fully vectorized versions of the Los Alamos National Laboratory benchmark code Gamteb, a Monte Carlo photon transport algorithm, were developed for the Cyber 205/ETA-10 and Cray X-MP/Y-MP architectures. Single-processor performance measurements of the vector and scalar implementations were modeled in a modified Amdahl's Law that accounts for additional data motion in the vector code. The performance and implementation strategy of the vector codes are related to architectural features of each machine. Speedups between fifteen and eighteen for Cyber 205/ETA-10 architectures, and about nine for CRAY X-MP/Y-MP architectures are observed. The best single processor execution time for the problem was 0.33 seconds on the ETA-10G, and 0.42 seconds on the CRAY Y-MP

  14. Computation cluster for Monte Carlo calculations

    Energy Technology Data Exchange (ETDEWEB)

    Petriska, M.; Vitazek, K.; Farkas, G.; Stacho, M.; Michalek, S. [Dep. Of Nuclear Physics and Technology, Faculty of Electrical Engineering and Information, Technology, Slovak Technical University, Ilkovicova 3, 81219 Bratislava (Slovakia)

    2010-07-01

    Two computation clusters based on Rocks Clusters 5.1 Linux distribution with Intel Core Duo and Intel Core Quad based computers were made at the Department of the Nuclear Physics and Technology. Clusters were used for Monte Carlo calculations, specifically for MCNP calculations applied in Nuclear reactor core simulations. Optimization for computation speed was made on hardware and software basis. Hardware cluster parameters, such as size of the memory, network speed, CPU speed, number of processors per computation, number of processors in one computer were tested for shortening the calculation time. For software optimization, different Fortran compilers, MPI implementations and CPU multi-core libraries were tested. Finally computer cluster was used in finding the weighting functions of neutron ex-core detectors of VVER-440. (authors)

  15. Monte Carlo calculations of channeling radiation

    International Nuclear Information System (INIS)

    Bloom, S.D.; Berman, B.L.; Hamilton, D.C.; Alguard, M.J.; Barrett, J.H.; Datz, S.; Pantell, R.H.; Swent, R.H.

    1981-01-01

    Results of classical Monte Carlo calculations are presented for the radiation produced by ultra-relativistic positrons incident in a direction parallel to the (110) plane of Si in the energy range 30 to 100 MeV. The results all show the characteristic CR(channeling radiation) peak in the energy range 20 keV to 100 keV. Plots of the centroid energies, widths, and total yields of the CR peaks as a function of energy show the power law dependences of γ 1 5 , γ 1 7 , and γ 2 5 respectively. Except for the centroid energies and power-law dependence is only approximate. Agreement with experimental data is good for the centroid energies and only rough for the widths. Adequate experimental data for verifying the yield dependence on γ does not yet exist

  16. Monte Carlo simulation of neutron scattering instruments

    International Nuclear Information System (INIS)

    Seeger, P.A.; Daemen, L.L.; Hjelm, R.P. Jr.

    1998-01-01

    A code package consisting of the Monte Carlo Library MCLIB, the executing code MC RUN, the web application MC Web, and various ancillary codes is proposed as an open standard for simulation of neutron scattering instruments. The architecture of the package includes structures to define surfaces, regions, and optical elements contained in regions. A particle is defined by its vector position and velocity, its time of flight, its mass and charge, and a polarization vector. The MC RUN code handles neutron transport and bookkeeping, while the action on the neutron within any region is computed using algorithms that may be deterministic, probabilistic, or a combination. Complete versatility is possible because the existing library may be supplemented by any procedures a user is able to code. Some examples are shown

  17. Monte Carlo simulation of the ARGO

    International Nuclear Information System (INIS)

    Depaola, G.O.

    1997-01-01

    We use GEANT Monte Carlo code to design an outline of the geometry and simulate the performance of the Argentine gamma-ray observer (ARGO), a telescope based on silicon strip detector technlogy. The γ-ray direction is determined by geometrical means and the angular resolution is calculated for small variations of the basic design. The results show that the angular resolutions vary from a few degrees at low energies (∝50 MeV) to 0.2 , approximately, at high energies (>500 MeV). We also made simulations using as incoming γ-ray the energy spectrum of PKS0208-512 and PKS0528+134 quasars. Moreover, a method based on multiple scattering theory is also used to determine the incoming energy. We show that this method is applicable to energy spectrum. (orig.)

  18. Variational Monte Carlo study of pentaquark states

    Energy Technology Data Exchange (ETDEWEB)

    Mark W. Paris

    2005-07-01

    Accurate numerical solution of the five-body Schrodinger equation is effected via variational Monte Carlo. The spectrum is assumed to exhibit a narrow resonance with strangeness S=+1. A fully antisymmetrized and pair-correlated five-quark wave function is obtained for the assumed non-relativistic Hamiltonian which has spin, isospin, and color dependent pair interactions and many-body confining terms which are fixed by the non-exotic spectra. Gauge field dynamics are modeled via flux tube exchange factors. The energy determined for the ground states with J=1/2 and negative (positive) parity is 2.22 GeV (2.50 GeV). A lower energy negative parity state is consistent with recent lattice results. The short-range structure of the state is analyzed via its diquark content.

  19. Geometric Monte Carlo and black Janus geometries

    Energy Technology Data Exchange (ETDEWEB)

    Bak, Dongsu, E-mail: dsbak@uos.ac.kr [Physics Department, University of Seoul, Seoul 02504 (Korea, Republic of); B.W. Lee Center for Fields, Gravity & Strings, Institute for Basic Sciences, Daejeon 34047 (Korea, Republic of); Kim, Chanju, E-mail: cjkim@ewha.ac.kr [Department of Physics, Ewha Womans University, Seoul 03760 (Korea, Republic of); Kim, Kyung Kiu, E-mail: kimkyungkiu@gmail.com [Department of Physics, Sejong University, Seoul 05006 (Korea, Republic of); Department of Physics, College of Science, Yonsei University, Seoul 03722 (Korea, Republic of); Min, Hyunsoo, E-mail: hsmin@uos.ac.kr [Physics Department, University of Seoul, Seoul 02504 (Korea, Republic of); Song, Jeong-Pil, E-mail: jeong_pil_song@brown.edu [Department of Chemistry, Brown University, Providence, RI 02912 (United States)

    2017-04-10

    We describe an application of the Monte Carlo method to the Janus deformation of the black brane background. We present numerical results for three and five dimensional black Janus geometries with planar and spherical interfaces. In particular, we argue that the 5D geometry with a spherical interface has an application in understanding the finite temperature bag-like QCD model via the AdS/CFT correspondence. The accuracy and convergence of the algorithm are evaluated with respect to the grid spacing. The systematic errors of the method are determined using an exact solution of 3D black Janus. This numerical approach for solving linear problems is unaffected initial guess of a trial solution and can handle an arbitrary geometry under various boundary conditions in the presence of source fields.

  20. Radiation Modeling with Direct Simulation Monte Carlo

    Science.gov (United States)

    Carlson, Ann B.; Hassan, H. A.

    1991-01-01

    Improvements in the modeling of radiation in low density shock waves with direct simulation Monte Carlo (DSMC) are the subject of this study. A new scheme to determine the relaxation collision numbers for excitation of electronic states is proposed. This scheme attempts to move the DSMC programs toward a more detailed modeling of the physics and more reliance on available rate data. The new method is compared with the current modeling technique and both techniques are compared with available experimental data. The differences in the results are evaluated. The test case is based on experimental measurements from the AVCO-Everett Research Laboratory electric arc-driven shock tube of a normal shock wave in air at 10 km/s and .1 Torr. The new method agrees with the available data as well as the results from the earlier scheme and is more easily extrapolated to di erent ow conditions.