WorldWideScience

Sample records for ions metalicos ou

  1. Development of a method employing chitosan to remove metallic ions from wastewater; Desenvolvimento de um metodo empregando quitosana para remocao de ions metalicos de aguas residuarias

    Energy Technology Data Exchange (ETDEWEB)

    Janegitz, Bruno Campos; Lourencao, Bruna Claudia; Lupetti, Karina Omuro; Fatibello-Filho, Orlando [Universidade Federal de Sao Carlos (UFSCAR), SP (Brazil). Dept. de Quimica

    2007-07-15

    In this work a method was developed for removing metallic ions from wastewaters by co-precipitation of Cu{sup 2+}, Pb{sup 2+}, Cd{sup 2+}, Cr{sup 3+} and Hg{sup 2+} with chitosan and sodium hydroxide solution. Solutions of these metallic ions in the range from 0.55 to 2160 mg L{sup -1} were added to chitosan dissolved in 0.05 mol L{sup -1} HCl. For the co-precipitation of metal-chitosan-hydroxide a 0.17 mol L{sup -1} NaOH solution was added until pH 8.5-9.5. A parallel study was carried out applying a 0.17 mol L{sup -1} NaOH solution to precipitate those metallic ions. Also, a chitosan solid phase column was used for removing those metallic ions from wastewaters. (author)

  2. Hong-Ou-Mandel interference of two phonons in trapped ions

    Science.gov (United States)

    Toyoda, Kenji; Hiji, Ryoto; Noguchi, Atsushi; Urabe, Shinji

    2015-11-01

    The quantum statistics of bosons and fermions manifest themselves in the manner in which two indistinguishable particles interfere quantum mechanically. When two photons, which are bosonic particles, enter a beam-splitter with one photon in each input port, they bunch together at either of the two output ports. The corresponding disappearance of the coincidence count is the Hong-Ou-Mandel effect. Here we show the phonon counterpart of this effect in a system of trapped-ion phonons, which are collective excitations derived by quantizing vibrational motions that obey Bose-Einstein statistics. We realize a beam-splitter transformation of the phonons by employing the mutual Coulomb repulsion between ions, and perform a two-phonon quantum interference experiment using that transformation. We observe an almost perfect disappearance of the phonon coincidence between two ion sites, confirming that phonons can be considered indistinguishable bosonic particles. The two-particle interference demonstrated here is purely a quantum effect, without a classical counterpart, hence it should be possible to demonstrate the existence of entanglement on this basis. We attempt to generate an entangled state of phonons at the centre of the Hong-Ou-Mandel dip in the coincidence temporal profile, under the assumption that the entangled phonon state is successfully generated if the fidelity of the analysis pulses is taken into account adequately. Two-phonon interference, as demonstrated here, proves the bosonic nature of phonons in a trapped-ion system. It opens the way to establishing phonon modes as carriers of quantum information in their own right, and could have implications for the quantum simulation of bosonic particles and analogue quantum computation via boson sampling.

  3. Hong-Ou-Mandel interference of two phonons in trapped ions.

    Science.gov (United States)

    Toyoda, Kenji; Hiji, Ryoto; Noguchi, Atsushi; Urabe, Shinji

    2015-11-05

    The quantum statistics of bosons and fermions manifest themselves in the manner in which two indistinguishable particles interfere quantum mechanically. When two photons, which are bosonic particles, enter a beam-splitter with one photon in each input port, they bunch together at either of the two output ports. The corresponding disappearance of the coincidence count is the Hong-Ou-Mandel effect. Here we show the phonon counterpart of this effect in a system of trapped-ion phonons, which are collective excitations derived by quantizing vibrational motions that obey Bose-Einstein statistics. We realize a beam-splitter transformation of the phonons by employing the mutual Coulomb repulsion between ions, and perform a two-phonon quantum interference experiment using that transformation. We observe an almost perfect disappearance of the phonon coincidence between two ion sites, confirming that phonons can be considered indistinguishable bosonic particles. The two-particle interference demonstrated here is purely a quantum effect, without a classical counterpart, hence it should be possible to demonstrate the existence of entanglement on this basis. We attempt to generate an entangled state of phonons at the centre of the Hong-Ou-Mandel dip in the coincidence temporal profile, under the assumption that the entangled phonon state is successfully generated if the fidelity of the analysis pulses is taken into account adequately. Two-phonon interference, as demonstrated here, proves the bosonic nature of phonons in a trapped-ion system. It opens the way to establishing phonon modes as carriers of quantum information in their own right, and could have implications for the quantum simulation of bosonic particles and analogue quantum computation via boson sampling.

  4. OU Ming (

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    OU Ming, male, was born in Shunde City of Guangdong Province, December 1924. After graduating from Medical College of Lingnan University in 1948, he was served as a physician in Chinese People's Liberation Army, government organization and Zhongshan Medical College. In 1956, he was appointed the post of participating in the founding of a new medical college, Guangzhou College of Traditional Chinese Medicine, and has worked there ever since, acting in the past as department head of internal medicine, deputy director of the affiliated hospital, director of teaching administration office and vice-president of the college successively and now as a full professor. Cardiovascular disease is his speciality and he has devoted to the scientific study of integration of traditional and western medicine in his field since then. He has taken charge of various national research projects, including “Clinical and Experimental Studies of the Effect of Ilexonin A on Congestive Heart Failure”, “The Molecular Biological Basis of Deficiency Syndrome in Traditional Chinese Medicine”, “Clinical and Experimental Studies of the Effect of Kaixin Capsule on Asymptomatic Myocardial Ischemia”, etc., and acted as the head of national collaborating group studying the treatment of cardiovascular diseases by traditional Chinese medicine and the integration of traditional and western medicine, a national key project of medicine in the 7th Five-Year Plan. Many achievements in scientific research have been obtained, which were appraised by experts as the achievements of advanced level in the country. A total of thirteen prizes (science and technology progress prize and commendation prize) has been awarded to him by Ministry of Science and Technology, Ministry of Health, State Administration of Traditional Chinese Medicine and Guangdong Commission of Science and Technology.  His writings are abundant. More than ten monographs concerning traditional Chinese medicine have been published

  5. Effects of ammonium ion, acetate and aerobic conditions on hydrogen production and expression levels of nitrogenase genes in Rhodobacter sphaeroides O.U.001

    Energy Technology Data Exchange (ETDEWEB)

    Akkoese, Sevilay; Guenduez, Ufuk; Yuecel, Meral [Middle East Technical University, Department of Biological Sciences, 06531 Ankara (Turkey); Eroglu, Inci [Middle East Technical University, Department of Chemical Engineering, 06531 Ankara (Turkey)

    2009-11-15

    In the present study, expression levels of nitrogenase encoding nifH and control genes nifA and prrA were examined at different physiological conditions in Rhodobacter sphaeroides O.U.001. In addition to variations in expression levels, changes in hydrogen production and growth were also investigated in response to different concentrations of ammonium source, acetate and aerobic conditions. In the present study, increasing concentration of ammonium chloride was found to be caused decrease in hydrogen production. Glutamate containing medium had the capacity for higher hydrogen production. Hydrogen production was observed even in aerobic conditions. The expression levels of nifH and nifA genes decreased with the increasing concentrations of ammonium chloride. Although the expression of nifA was present in the highest concentrations of NH{sub 4}Cl under anaerobic conditions, no expression was observed under aerobic conditions of the same culture conditions. This was likely due to transcriptional level inhibition of nitrogenase in the presence of ammonium ion. Negative correlation was observed between the expression levels of prrA gene and its target, nifA gene. (author)

  6. Analysis of the models of the metal oxide lightning; Analisis de los modelos de apartarrayos de oxidos metalicos

    Energy Technology Data Exchange (ETDEWEB)

    Del Angel Hernandez, Alberto

    1999-12-01

    criterio para juzgar la confiabilidad de un sistema electrico de potencia, es la frecuencia y duracion de la interrupcion del suministro de energia electrica a los consumidores. Debido a la importancia de mantener la continuidad del servicio de energia electrica, es necesario estudiar los dispositivos de proteccion contra sobretensiones, ya que en condiciones meteorologicas adversas, asi como por condiciones de cambio de configuracion en la red, se pueden presentar sobretensiones que danen a los equipos del sistema electrico de potencia. Los apartarrayos son dispositivos cuya funcion es proteger equipos de un sistema electrico de potencia contra las sobretensiones, por medio de absorcion de energia a traves del sistema de aterrizamiento. En la proteccion de los Sistemas Electricos de Potencia (SEP) contra sobretensiones comunmente se empleaban los apartarrayos de carburo de silicio (SiC) que brindaban un margen de proteccion pequeno. En los ultimos anos se han desarrollado nuevas tecnologias que han revolucionado la coordinacion del aislamiento. Un ejemplo de estas tecnologias es la aplicacion de los apartarrayos de oxidos metalicos (ZnO), los cuales incrementan el margen de proteccion considerablemente. En este trabajo se evaluan las limitaciones y potencialidades reales de los modelos existentes, y el propuesto en este trabajo, de apartarrayos de oxidos metalicos, con la ayuda de las simulaciones digitales en transitorios electromagneticos, cuando los apartarrayos estan sujetos a transitorios por maniobra de interruptores como por descargas atmosfericas. Todas las simulaciones en este trabajo se realizaron con el Programa de Transitorios Electromagneticos (EMTP), que es una herramienta ampliamente usada y recomendada para el analisis de los fenomenos transitorios electromagneticos. El modelado de los apartarrayos de oxidos metalicos en el EMTP es complicado por el comportamiento no lineal de sus elementos y se requiere de una gran precision y cuidado para implementar

  7. Ou Ning: Bishan Commune

    DEFF Research Database (Denmark)

    Ou, Ning

    Ou Ning: How to Start Your Own Utopia Oversat fra kinesisk af Mai Corlin 120 sider (faksimile, farvetryk) + 32 sider (hæfte) 180 kr Udgivet af OVO press og Antipyrine Den kinesiske aktivist, redaktør og kurator Ou Ning udformede sin notesbog Hvordan man laver sin egen utopi i 2010 til en Moleskin...

  8. Determination of the thermal conductivity of metallic coatings; Determinacion de la conductividad termica de recubrimientos metalicos

    Energy Technology Data Exchange (ETDEWEB)

    Uc Way, Manuel Eugenio

    1998-02-01

    obtained. This value is small when it is compared with the effect that introduces the deposition of slag in these banks of tubes, that is in the order of 50 to 250 Celsuis degrees approximately, for this interval of thermal flows. [Espanol] Debido a la corrosion por alta temperatura se tiene un serio problema por indisponibilidad y eficiencia de los generadores de vapor en las centrales termoelectricas. Una de las partes mas afectadas por este fenomeno son los bancos de tubos de los sobrecalentadores. Con el objeto de disminuir dicho problema se pretende aplicar a los tubos antes mencionados un recubrimiento metalico a base de niquel y cromo (80Ni20Cr), la deposicion del recubrimiento se hace por el metodo de termorrociado de polvos por flama. El espesor del recubrimiento una vez que ha sido depositado es del orden de 500mm, es indudable que el flujo termico entre los gases de combustion y el fluido conducido en los tubos se ve afectado. Por esto es importante conocer la conductividad termica del recubrimiento a fin de evaluar el impacto que se tiene en el funcionamiento del generador de vapor. Esta necesidad es la que da lugar al presente proyecto de tesis, en el cual se disena una tecnica que permite medir la conductividad termica del recubrimiento. La experimentacion se lleva a cabo tomando como punto de partida la norma E1225-87 de la ASTM y se adecua a las caracteristicas del material a probar. Se diseno una probeta de acero inoxidable 316 para medir el flujo termico que atraviesa el recubrimiento. Primero se caracterizo la instalacion experimental a fin de determinar su confiabilidad. Posteriormente se realizo la experimentacion encontrandose una conductividad termica promedio de 12.09{+-}0.72 W/m K en el intervalo de temperatura de 110-180 grados Celsius. Este valor es 12.3% inferior al correspondiente a un metal solido de la misma composicion. Si consideramos que en los bancos de alta temperatura de los generadores de vapor el flujo termico se encuentra en el

  9. Multivariate supOU processes

    DEFF Research Database (Denmark)

    Barndorff-Nielsen, Ole Eiler; Stelzer, Robert

    Univariate superpositions of Ornstein-Uhlenbeck (OU) type processes, called supOU processes, provide a class of continuous time processes capable of exhibiting long memory behaviour. This paper introduces multivariate supOU processes and gives conditions for their existence and finiteness...... of OU type processes, which has been suggested in [2] in the univariate case. Finally, as an important special case, we introduce positive semi-definite supOU processes....

  10. Metallic complexes with glyphosate: a review; Complexos metalicos com o herbicida glifosato: revisao

    Energy Technology Data Exchange (ETDEWEB)

    Coutinho, Claudia F.B.; Mazo, Luiz Henrique [Sao Paulo Univ., Sao Carlos, SP (Brazil). Inst. de Quimica]. E-mail: claudiabreda@iqsc.usp.br

    2005-11-15

    We present studies involving metallic ions and the herbicide glyphosate. The metallic complexes of Cu(II), Zn(II), Mn(II), Ni(II), Cd(II), Pb(II), Cr(III), Fe(III), Co(III), ammonium, sodium, Ag(I), alkaline earth metals and of some lanthanides ions are described. The complexes are discussed in terms of their synthesis, identification, stability and structural properties, based on data from the current literature. (author)

  11. Multivariate supOU processes

    DEFF Research Database (Denmark)

    Barndorff-Nielsen, Ole Eiler; Stelzer, Robert

    2011-01-01

    Univariate superpositions of Ornstein–Uhlenbeck-type processes (OU), called supOU processes, provide a class of continuous time processes capable of exhibiting long memory behavior. This paper introduces multivariate supOU processes and gives conditions for their existence and finiteness of momen...

  12. Grazing incidence collisions of ions and atoms with surfaces: from charge exchange to atomic diffraction; Collisions rasantes d'ions ou d'atomes sur les surfaces: de l'echange de charge a la diffraction atomique

    Energy Technology Data Exchange (ETDEWEB)

    Rousseau, P

    2006-09-15

    This thesis reports two studies about the interaction with insulating surfaces of keV ions or atoms under grazing incidence. The first part presents a study of charge exchange processes occurring during the interaction of singly charged ions with the surface of NaCl. In particular, by measuring the scattered charge fraction and the energy loss in coincidence with electron emission, the neutralization mechanism is determined for S{sup +}, C{sup +}, Xe{sup +}, H{sup +}, O{sup +}, Kr{sup +}, N{sup +}, Ar{sup +}, F{sup +}, Ne{sup +} and He{sup +}. These results show the importance of the double electron capture as neutralization process for ions having too much potential energy for resonant capture and not enough for Auger neutralization. We have also studied the ionisation of the projectile and of the surface, and the different Auger-like neutralization processes resulting in electron emission, population of conduction band or excited state. For oxygen scattering, we have measured an higher electron yield in coincidence with scattered negative ion than with scattered atom suggesting the transient formation above the surface of the oxygen doubly negative ion. The second study deals with the fast atom diffraction, a new phenomenon observed for the first time during this work. Due to the large parallel velocity, the surface appears as a corrugated wall where rows interfere. Similarly to the Thermal Atom Scattering the diffraction pattern corresponds to the surface potential and is sensitive to vibrations. We have study the H-NaCl and He-LiF atom-surface potentials in the 20 meV - 1 eV range. This new method offers interesting perspectives for surface characterisation. (author)

  13. Menopausa ou Menopausas?

    Directory of Open Access Journals (Sweden)

    Belkis Trench

    Full Text Available Na vida das mulheres existem marcos concretos e objetivos que sinalizam diferentes fases ou passagens de suas vidas, tais como a menarca, o rompimento do hímen, a última menstruação. São marcos visíveis no corpo físico e cada cultura os investe de sua rubrica. Na nossa cultura, historicamente, associam-se à menopausa inúmeras afecções (físicas e psíquicas. A partir do trabalho de Robert Wilson, publicado no livro Eternamente Feminina (1966, a menopausa adquire o estatuto de doença e a sua prevenção, tratamento e cura vinculam-se à terapia de reposição hormonal (TRH. Os diferentes discursos que circulam sobre a menopausa em nossa cultura não só contribuem para que tal associação seja mantida, como partem do pressuposto que as questões relacionadas à menopausa e envelhecimentos se apresentam igualitariamente às mulheres, independentemente de sua condição física, psíquica, social, econômica e cultural. O estudo tem como objetivo abordar alguns aspectos da construção da menopausa em nossa cultura e simultaneamente mostrar o quanto este evento deve ser percebido em seu caráter particular e relativo, e não como sendo da ordem do universal ou padronizado.

  14. Bilinguismes ou bi- appartenances

    Directory of Open Access Journals (Sweden)

    Jean-Charles Vegliante

    2012-10-01

    Full Text Available Dans cet essai, l’auteur évoque son sentiment de bi-appartenance lorsqu’il séjourne à Sienne, une de ses villes de prédilection. A l’occasion d’un congrès sur le thème : « Repenser la Méditerranée », ou de la projection d’un film évoquant les lendemains de massacres, il soulève des questions existentielles, en particulier la nécessité de « se parler ». Le bilinguisme se définit selon l’auteur comme une nécessité, une volonté de mieux entendre l’autre. Il évoque les exemples des poètes italiens Giuseppe Ungaretti (parfaitement francophone et Gabriele D’Annunzio, de l’allemand Franz Kafka et de l’anglais Milton. L’auteur passe du français à l’italien : « Lost in translation ?», comme il le dit plaisamment en conclusion.

  15. Chromatographic separation process with pellicular ion exchange resins that can be used for ion or isotope separation and resins used in this process. Procede de separation chromatographique au moyen de resines echangeuses d'ions pelliculaires, utilisable notamment pour la separation des isotopes ou des ions, et resines utilisables dans ce procede

    Energy Technology Data Exchange (ETDEWEB)

    Carles, M.; Neige, R.; Niemann, C.; Michel, A.; Bert, M.; Bodrero, S.; Guyot, A.

    1989-01-06

    For separation of uranium, boron or nitrogen isotopes, an isotopic exchange is carried out betwen an isotope fixed on an ion exchange resin and another isotope of the same element in the liquid phase contacting the resin. Pellicular resins are used comprising composite particulates with an inert polymeric core and a surface layer with ion exchange groups.

  16. Oil Paintings by Ou Yang

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    Ou Yang, professor of the Oil Painting Department of Guangdong Art College, has been pursuing perfection in the field of art for many years. With their rich emotional color, paintings by her do not simply

  17. Isobutane/2-butene alkylation in Y zeolite exchange with metallic ions; Alquilacao de isobutano com 2-buteno em zeolita Y trocada com ions metalicos

    Energy Technology Data Exchange (ETDEWEB)

    Rosenbach Junior, Nilton; Mota, Claudio J.A. [Universidade Federal, Rio de Janeiro, RJ (Brazil). Inst. de Quimica]. E-mail: cmota@iq.ufrj.br

    2003-07-01

    In industrial scale-process, isobutane/2-butene alkylation has been normally achieved under strong acids conditions, using HF or H{sub 2}SO{sub 4} as catalysts. Nevertheless, this acids present problems such as high consumption and environmental risk. Therefore, there is a strong interest in substituting them by solid catalysts. However, over solid acids, there is a fast deactivation, usually attributed to oligomerization, occurring on Broensted sites, that preferentially adsorb the unsaturated hydrocarbons. This study shows that the reaction can occur on zeolites Y without Broensted acid sites, using an alkyl halide as initiator, added to the feed in the initial moments of the reaction. In this approach the oligomerization problem is minimized. The reactions were carried out in liquid phase at 50 deg C and 450 lb/in{sup 2}, using a mixture of isobutene/2-butene with a molar fraction of 10:1. Catalyst activity and selectivity to trimethylpentane and dimethylhexane for the Y zeolite exchange with Ag{sup +}, Cu{sup ++} and Fe{sup +++} were followed by on line capillary gas chromatography. For comparison purpose, the reaction was also carried out on a HUSY zeolite. All cation-exchanged zeolite presented a better performance than the protonic zeolite. The best performance was of the Y zeolite exchange with Ag{sup +}, followed by Cu{sup ++} and Fe{sup +++} exchanged zeolites. (author)

  18. Study of secondary electron emission from thin carbon targets with swift charged particles: heavy ions, hydrogen ions; Etude experimentale de l`emission electronique secondaire de cibles minces de carbone sous l`impact de projectiles rapides: ions lourds, ions hydrogene (atomiques, moleculaires ou sous forme d`agregats)

    Energy Technology Data Exchange (ETDEWEB)

    Billebaud, A.

    1995-07-12

    The main subject of this work is the study of electron emission from the two surfaces of thin solid targets bombarded with swift charged particles. The slowing down of swift ions in matter is mainly due to inelastic interaction with target electrons (ionization, excitation): the energy transfer to target electrons is responsible for the secondary electron emission process. The phenomenological and theoretical descriptions of this phenomena are the subject of the first chapter. We focused on secondary electron emission induced by different kind of projectiles on thin carbon foils. In chapter two we describe hydrogen cluster induced electron emission measurement between 40 and 120 keV/proton. These projectiles, composed of several atoms, allowed us to study and highlight collective effects of the electron emission process. We extended our study of electron emission to molecular (H{sub 2}{sup +}, H{sub 3}{sup +}) and composite (H{sup -}, H{sup 0}) projectiles at higher energies (<= 2 MeV): we have designed an experimental set-up devoted to electron emission statistics measurements which allowed us to study, among others things, the role of projectile electrons in secondary electron emission. This experiment is described in the third chapter. Finally, the fourth chapter describes new measurements of electron emission induced by energetic (13 MeV/u) and highly charged argon ion provided by the medium energy beam line (SME) of GANIL (Caen), which have been analyzed in the framework of a semi-empirical model of secondary electron emission. This set of experiments brings new results on composite projectile interaction with matter, and on the consequences of high energy deposition in solids. (author).

  19. The study of conjugation of anti-CD20 monoclonal antibody for labeling with metallic or lanthanides radionuclides; Estudo de conjugacao do anticorpo anti-CD20 para marcacao com radionuclideos metalicos ou lantanideos

    Energy Technology Data Exchange (ETDEWEB)

    Akanji, Akinkunmi Ganiyu

    2012-07-01

    Lymphomas are malignancies or cancers that start from the malign transformation of a lymphocyte in the lymphatic system. Generally, lymphomas start from the lymph nodes or from the agglomeration of the lymphatic tissues, organs like stomach, intestines, in some cases it can involve the bone marrow and the blood, it can also disseminate to other organs. Lymphomas are divided in two major categories: Hodgkin lymphoma and non-Hodgkin lymphoma (NHL). Patient with NHL are generally treated with radiotherapy alone or combined with immunotherapy using monoclonal antibody rituximab (MabThera Registered-Sign ). Currently, monoclonal antibodies (Acm) conjugated with bifunctional chelate agents and radiolabeled with metallic or lanthanides radionuclides are a treatment reality for patients with NHL by the principle of radioimmunotherapy (RIT). This study focused on the conditions of conjugation of Acm rituximab (MabThera Registered-Sign ) with bifunctional chelating agents DOTA and DTPA. Various parameters were studied: method of Acm purification, conditions of Acm conjugation, the method for determination of number of chelate agent coupled to the Acm, method for purification of the conjugated antibody Acm, conditions of labeling of the conjugated antibody with lutetium-177, method of purification of the radiolabeled immuno conjugate, method of radiochemical purity (RP), specific binding in vitro Raji cells (Human Burkitt) and biological distribution performed in normal Balb-c mouse. The three methodologies employed in pre-purification of Acm (dialysis, size exclusion chromatograph and dial filtration) demonstrated to be efficient; they provided sample recovery exceeding 90%. However, the methodology of dial filtration presents minimal sample loss, and gave the final recovery of the sample in micro liters; thereby facilitating sample use in subsequent experiments. Numbers of chelators attached to the Acm molecule was proportional to the molar ratio studied. When we evaluated the influence of different conditions of conjugation in the number of chelators bounded to the Acm, no notable differences were observed. The RP < 80% was observed in all the methods applied. Purification of the conjugated antibody by dialysis and size exclusion chromatography demonstrated to be efficient, but deficient in terms of high sample volume recovered. The dial filtration was efficient and practical besides it provided sample recovery in micro liters. The optimized conditions for purification of the conjugated antibody preserved the protein integrity. When the conjugated Acm was labeled with lutetium-177 a product with low RP was observed in all molar ratios studied. The methodology used in the control of RP of the radiolabeled antibody was efficient in the discrimination of radiochemical species presented in the reaction mixture. The method of purification of the conjugated antibody applied, proved to be efficient in separating the labeled antibody from free lutetium. The results of specific cell binding studies performed with the conjugated Acm showed high percentage of nonspecific binding. Biological distribution in normal Balb-c mice demonstrated higher uptake of the labeled antibody by kidney and liver. The relatively high uptake observed by bone tissue may indicate some in vivo instability. However, results obtained in this study showed to be close related in literature. Thus, these data confirm the potential of antibody conjugated to DOTA and DTPA labeled with lutetium-177 for radioimmunotherapy of non-Hodgkin lymphoma. (author)

  20. Ion microscopy analysis of the intracellular distribution of {sup 14}C-or {sup 15}N-labelled cytotoxic drugs; Analyse par microscopie ionique de la distribution intracellulaire de drogues cytotoxiques marquees par {sup 14}C ou {sup 15}N

    Energy Technology Data Exchange (ETDEWEB)

    Bisagni, E.; Carrez, D.; Croisy, A.; Favaudon, V.; Guerquin-Kern, J.L.; Nguyen, C.H.; Rivalle, C. [Institut Curie, 91 - Orsay (France); Dennebouy, R.; Slodzian, G. [Paris-11 Univ., 91 - Orsay (France); Galle, P. [Faculte de Medecine, 94 - Creteil (France)

    1994-12-31

    This study has concerned the localization, by the means of ion microscopy of human tumoral cells (in culture), of two synthesized cytostatic compounds: BD40 or Pazelliptine and Intoplicine. These two active compounds (cancer research) have been labelled either with {sup 15}N on the terminal amino dialkyl group of the lateral chain, either, for Intoplicine, with {sup 14}C on the carbon 3 of the aromatic cycle. These two drugs are considered as poisons for topo-isomerases, and they were used to localize these cellular multiplication key-enzymes. Unfortunately, pazelliptine and intoplicine specificity appeared much too low. However, encouraging results were obtained, particularly on {sup 15}N-labelling utilization. 4 figs., 9 refs.

  1. Quantification of ion or atom transfer phenomena in materials implanted by nuclear methods; Quantification de phenomenes de transferts ioniques ou atomiques dans des materiaux implantes par la mise en oeuvre de methodes nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Oudadesse, Hassane [Clermont-Ferrand-2 Univ., 63 - Aubiere (France)

    1998-05-18

    Knowledge of transfer of the constituents of a system from regions of higher to lower concentration is of interest for implanted bio-materials. It allows determining the rate at which this material is integrated in a living material. To evaluate the ossification kinetics and to study the bio-functionality in corals of Ca and Sr, irradiations with a 10{sup 13} n.cm{sup -2}.s{sup -1} was performed, followed by the examination of changes in the localization of these elements. By using PIXE analysis method the distribution of Ca, P, Sr, Zn and Fe in the implant, bone and bone-implant interfaces were determined. Thus, it was shown that resorption of coral in sheep is achieved in 5 months after implantation and is identical to the cortical tissues 4 months after implantation in animals as for instance in hares. We have analyzed the tissues from around the prostheses extracted from patients. The samples were calcined and reduced to powder weighting some milligrams. We have adopted for this study the PIXE analysis method. The samples were irradiated by a proton beam of 3 MeV and about 400 {mu}m diameter. The results show the presence of the elements Ti, Fe, Cr, Ni or Zn according to the type of the implanted prosthesis. This dispersal of the metallic ions and atoms contaminate the tissues. The transfer factors translate the exchanges between bone and the implanted material. The solvatation phenomenon and the electric charge equilibrium explain the transfer order of cations Mg{sup 2+}, Ca{sup 2+} and Sr{sup 2+} and of the anion PO{sub 4}{sup 3-}. We have also determined these factors for the elements Ti, Cr and Ni. An original technique to study the bone bio-functionality was used. Use of phosphate derivatives labelled by {sup 99m}Tc allows obtaining information about the fixation of radioactive tracer. It was found that only after the eighth month at the implantation the neo-formed bone fixes the MDP (methyl diphosphate) labelled by {sup 99m}Tc in a similar way as in the

  2. Disen?o de los sistemas de transporte para el producto de la li?nea 1 y automatizacio?n para la li?nea 5 de recubrimientos meta?licos en la empresa “Metal Print Narva?ez”

    OpenAIRE

    Ca?rdenas Encalada, A?ngel; Calle Me?ndez, Luis; Sa?nchez Loja, Rene?

    2012-01-01

    El presente texto muestra el disen?o de los sistemas de transporte para el producto de la li?nea 1 y automatizacio?n para la li?nea 5 de recubrimientos meta?licos en la empresa Metal Print Narva?ez, partiendo con un diagno?stico que se realizo? en la empresa. En la li?nea 1 de inyeccio?n se selecciono? el transporte de banda de tablillas, ya que permite el traslado de piezas a elevada temperatura sin que se presenten dan?os en los mecanismos y permite que las pe?rdidas de tiempo se reduzcan e...

  3. Camus ou l’artiste au travail

    Directory of Open Access Journals (Sweden)

    Inmaculada Cuquerella Madoz

    2015-12-01

    Full Text Available « Camus ou l’artiste au travail » voudrait rappeler quelques aspects du riche parcours vital, littéraire et intellectuel de l’écrivain et penseur français Albert Camus. C’est à partir de la nouvelle « Jonas ou l’artiste au travail », rédigée vers 1953, que ce portrait sera dressé. Camus y propose une satire mordante du milieu artistique et intellectuel parisien où il étouffe et dépérit depuis la controverse, provoquée par la parution de son essai L’Homme révolté, qui l’oppose au cercle sartrien et à la gauche communiste. Ce conte philosophique, assez énigmatique et bien moins connu que les romans majeurs que sont L’Étranger, La Peste ou La Chute, permet cependant de creuser dans l’univers tragique de l’auteur qui, à l’image de ce qui arrive au peintre Jonas (et que l’on retrouve chez l’étranger Meursault, le docteur Rieux et le juge-pénitent Clamence se sent tiraillé entre l’existence solitaire et l’existence solidaire.

  4. Digestibilidade parcial e total de rações com a inclusão de ionóforo ou probiótico para bubalinos e bovinos Total and partial digestibility of diets with ionophore or probiotic inclusion for buffaloes and bovine

    Directory of Open Access Journals (Sweden)

    Lucia Maria Zeoula

    2008-03-01

    Full Text Available Avaliaram-se os efeitos do ionóforo (monensina sódica e do probiótico (Saccharomyces cerevisiae + selênio + cromo em rações com 50:50% de volumoso:concentrado sobre os coeficientes de digestibilidade total (CDT e parcial dos nutrientes. Foram utilizados três búfalos da raça Murrah e três bovinos da raça holandesa, com peso médio de 477 ± 47 e 518 ± 56 kg, respectivamente, portadores de cânula ruminal e duodenal, distribuídos em delineamento experimental com dois quadrados latinos 3 ´ 3 e arranjo fatorial 3 ´ 2. O indicador dos fluxos fecal e duodenal foi a cinza insolúvel em ácido. Não houve interação dieta ´ espécie animal para os CTD dos nutrientes, porém a adição de ionóforo à ração teve efeito positivo sobre os CDT de MS, PB, EE e amido e a adição de probiótico aumentou os CDT do amido, da FDN e da FDA. As adições de ionóforo e probiótico propiciaram maior fermentação ruminal da FDN e FDA e maiores coeficientes de digestibilidade intestinal (CDI do amido. Observaram-se maiores CDT da PB e do amido para os bovinos e maior CDT da FDN para búfalos. Houve interação rações ´ espécie somente sobre os coeficientes de digestibilidade ruminal (CDR e CDI de MS, PB e EE. Para ambas as espécies, a adição de ionóforo foi efetiva em aumentar a fermentação ruminal da MS, reduzir a degradação ruminal da PB e elevar o CDI da PB. A adição do probiótico também reduziu a degradação ruminal da PB em bubalinos, porém em menor escala que o ionóforo. Independentemente da presença ou não dos aditivos nas rações, os bubalinos apresentaram maior CDR da MS e sem a adição de aditivos, maior CDR da PB e menor CDI da PB que os bovinos.The effects of the ionophore (sodic monensin and of the probiotic (Saccharomyces cerevisiae + selenium + chrome were evaluated in rations with 50:50% of forage:concentrate ratio on the total (TDC and partial [ruminal digestibility coefficients (RDC and intestinal (IDN

  5. Partage de connaissances ou partage de documents ?

    OpenAIRE

    Kolmayer, Elisabeth; Peyrelong, Marie-France

    1999-01-01

    Les évolutions technologiques et les discours managériaux semblent conduire à une vision "enchantée" de la gestion et du partage des connaissances dans les entreprises. Cette gestion passe de manière "évidente" par l'outil électronique. Or s'interroger sur les supports de connaissance, c'est moins s'interroger sur le passage du papier à l'électronique, que sur l'élaboration de connaissances ou d'informations "collectives", et sur leurs possibilités d'appropriation. Nous nous appuyons pour cel...

  6. Hermeneutiese uitdagings aan Christosentriese prediking vanuit Ou-Testamentiese narratiewe

    Directory of Open Access Journals (Sweden)

    Hendrik S.W. Strauss

    2014-09-01

    Full Text Available Baie predikers vind dit moeilik om Christus vanuit die Ou Testament te verkondig. Die probleem van Christosentriese prediking uit die Ou Testament is wesenlik ’n hermeneutiese probleem. In hierdie artikel word gepoog om ’n antwoord hierop te bied deur eerstens bepaalde ankers in ’n see van hermeneutiese moontlikhede te identifiseer. Hierdie ankers sluit in die Christelike karakter van die Ou Testament en die eenheid tussen die Ou en Nuwe Testament met ’n universele boodskap. Ten einde Christus op ’n geloofwaardige en verantwoordelike wyse vanuit die Ou Testament te preek, is ’n eksegetiese metode waarin rekening gehou word met die karakter van die Ou Testament, sowel as die verhouding daarvan tot die Nuwe Testament, onontbeerlik. Die holisties histories-kritiese metode dien, na ons mening, Christosentriese prediking uit die Ou Testament die beste, aangesien dit die literêre, historiese en teologiese aspekte van ’n teks verreken. Terwyl ’n verantwoordelike eksegetiese metode die basis lê vir Christosentriese prediking uit die Ou Testament, word daar ook ’n verkenning gedoen van sinvolle (organiese oorgange vanuit Ou-Testamentiese narratiewe na die Nuwe Testament. Aangesien Christosentriese prediking uit die Ou Testament nie sonder gevare is nie, word enkele slaggate ten opsigte daarvan uit die Ou-Testamentiese narratiewe uitgelig.

  7. Incorporation of zinc oxide to dispersions of biopolymers and release of the metallic ion in vitro; Incorporacao de oxido de zinco a dispersoes de biopolimeros e liberacao do ion metalico in vitro

    Energy Technology Data Exchange (ETDEWEB)

    Barreto, Marina S.R.; Ferreira, Willian H.; Andrade, Cristina T., E-mail: marinarodriguesbarreto@gmail.com [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil)

    2015-07-01

    Zinc oxide (ZnO) nanoparticles, obtained from a commercial product, were dispersed in different biopolymers, to be added to piglet feeds. The resulting products, prepared with sodium alginate (SA), chitosan (CH) and low methoxyl pectin (LMP) were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The release of Zn{sup 2+} was investigated under simulated conditions of the gastrointestinal tract of piglets, and analyzed by atomic absorption spectroscopy (AA). The results showed that the structural factors, which have influence on the biopolymer/ZnO interactions, govern the behavior of Zn{sup 2+} release. (author)

  8. Adesivos universais ou multi-mode

    OpenAIRE

    Tavares, Ana Sofia Peixe

    2016-01-01

    Os adesivos Universais (SAU) ou Multi-mode são dispositivos recentemente lançados no mercado que visam oferecer ao Médico Dentista a livre escolha da estratégia de adesão (ER e SE) a usar consoante o tipo de condição clínica. Estes adesivos são categorizados como Universais por serem versáteis quanto ás suas instruções de uso e áreas de aplicação. Na realidade, os SAU são uma extensão melhorada e adaptada, dos adesivos SE. O presente trabalho consiste numa revisão narrativa sob...

  9. Ensaio de linguagem ou linguagem de ensaio

    Directory of Open Access Journals (Sweden)

    Pedro Duarte

    2007-04-01

    Full Text Available Este texto é um ensaio de linguagem, ou seja, um ensaio sobre a linguagem. Mas é, também, a investigação da linguagem do ensaio, isto é, do tipo de escrita que entra em jogo na forma de prosa que chamamos de ensaios. Para tanto, ele mobiliza autores como Heidegger e, principalmente, Walter Benjamin, Lukács e Adorno. Todos eles, porém, entram em cena no intuito de ajudar num estudo sobre a importância da linguagem no enfrentamento da situação contemporânea do pensamento, cuja problematização filosófica fica evidente a partir das dificuldades, por exemplo, de escrever uma tese acadêmica tradicional.

  10. Atomic Hong-Ou-Mandel experiment

    Science.gov (United States)

    Lopes, R.; Imanaliev, A.; Aspect, A.; Cheneau, M.; Boiron, D.; Westbrook, C. I.

    2015-04-01

    Two-particle interference is a fundamental feature of quantum mechanics, and is even less intuitive than wave-particle duality for a single particle. In this duality, classical concepts--wave or particle--are still referred to, and interference happens in ordinary space-time. On the other hand, two-particle interference takes place in a mathematical space that has no classical counterpart. Entanglement lies at the heart of this interference, as it does in the fundamental tests of quantum mechanics involving the violation of Bell's inequalities. The Hong, Ou and Mandel experiment is a conceptually simpler situation, in which the interference between two-photon amplitudes also leads to behaviour impossible to describe using a simple classical model. Here we report the realization of the Hong, Ou and Mandel experiment using atoms instead of photons. We create a source that emits pairs of atoms, and cause one atom of each pair to enter one of the two input channels of a beam-splitter, and the other atom to enter the other input channel. When the atoms are spatially overlapped so that the two inputs are indistinguishable, the atoms always emerge together in one of the output channels. This result opens the way to testing Bell's inequalities involving mechanical observables of massive particles, such as momentum, using methods inspired by quantum optics, and to testing theories of the quantum-to-classical transition. Our work also demonstrates a new way to benchmark non-classical atom sources that may be of interest for quantum information processing and quantum simulation.

  11. SITUATION OF FLUORIDES RATE IN WATERS AND MAJOR CONSUMED FOOD IN WILAYA EL-OUED

    Directory of Open Access Journals (Sweden)

    A. Zobeidi

    2015-08-01

    Full Text Available The effects of mineral salts in the drinking water, beneficial or harmful depending on their concentration, are known for many years and thus the problem posed                     by fluoride ions in the waters of the region (Fluorosis Dental and skeletal. This                  study proposes, the estimated daily intake of fluoride from its water distribution and           the main food consumed per capita in the region of El-Oued (dates, tea,                          couscous, lentils, carrots, potatoes, pumpkin ..., which has a significant content of fluoride in their composition. In addition to the arid climatic conditions, the air temperature is very high in summer, leads to a strong human perspiration. This preliminary result leads us to propose a standard fluoride-specific region of El-Oued. The results showed that the majority of water samples and analyzed the main foods of the region of El-Oued is charged fluoride ions and exceed the maximum dose recommended for adults from 0.05 to 0.07 mg / kg / day.

  12. SITUATION OF FLUORIDES RATE IN WATERS AND MAJOR CONSUMED FOOD IN WILAYA EL-OUED

    Directory of Open Access Journals (Sweden)

    A. Zobeidi

    2013-12-01

    Full Text Available The effects of mineral salts in the drinking water, beneficial or harmful depending on their concentration, are known for many years and thus the problem posed by fluoride ions in the waters of the region (Fluorosis Dental and skeletal. This study proposes, the estimated daily intake of fluoride from its water distribution and the main food consumed per capita in the region of El-Oued (dates, tea, couscous, lentils, carrots, potatoes, pumpkin ..., which has a significant content of fluoride in their composition. In addition to the arid climatic conditions, the air temperature is very high in summer, leads to a strong human perspiration. This preliminary result leads us to propose a standard fluoride-specific region of El-Oued. The results showed that the majority of water samples and analyzed the main foods of the region of El-Oued is charged fluoride ions and exceed the maximum dose recommended for adults from 0.05 to 0.07 mg / kg / day.

  13. Menopausa ou Menopausas? Menopause or Menopauses?

    Directory of Open Access Journals (Sweden)

    Belkis Trench

    2005-04-01

    Full Text Available Na vida das mulheres existem marcos concretos e objetivos que sinalizam diferentes fases ou passagens de suas vidas, tais como a menarca, o rompimento do hímen, a última menstruação. São marcos visíveis no corpo físico e cada cultura os investe de sua rubrica. Na nossa cultura, historicamente, associam-se à menopausa inúmeras afecções (físicas e psíquicas. A partir do trabalho de Robert Wilson, publicado no livro Eternamente Feminina (1966, a menopausa adquire o estatuto de doença e a sua prevenção, tratamento e cura vinculam-se à terapia de reposição hormonal (TRH. Os diferentes discursos que circulam sobre a menopausa em nossa cultura não só contribuem para que tal associação seja mantida, como partem do pressuposto que as questões relacionadas à menopausa e envelhecimentos se apresentam igualitariamente às mulheres, independentemente de sua condição física, psíquica, social, econômica e cultural. O estudo tem como objetivo abordar alguns aspectos da construção da menopausa em nossa cultura e simultaneamente mostrar o quanto este evento deve ser percebido em seu caráter particular e relativo, e não como sendo da ordem do universal ou padronizado.There are concrete and objective signs in women's lives that mark different phases or passages of their lives such as the menarche, the breaking of the hymen, the last period. These are visible marks in the physical body and each culture invests them with its seal. Historically in our culture, countless diseases (physic and psychic are associated with the menopause. Starting with Robert Wilson's studies, published in the book Feminine Forever (1966, the menopause acquires the statute of disease and its prevention, treatment and cure are linked to the Hormonal Replacement Therapy (HRT. The different discourses that circulate on the menopause in our culture not only contribute to the maintenance of such an association, but also assume that the subjects related to

  14. O CONHECIMENTO ORGANIZACIONAL: PRODUTO OU PROCESSO?

    Directory of Open Access Journals (Sweden)

    Patricia de Sá Freire

    2014-01-01

    Full Text Available Este estudo objetiva compreender como uma empresa pode mapear e identificar com mais precisão e agilidade o conhecimento visto que este é construido na mente humano, bem como gerenciá-lo de maneira a diminuir os riscos da sua transferência e integração entre pessoas, entre sistemas ou entre pessoas e sistemas. Para tal, foi elaborado o estado da arte sobre o termo “conhecimento”, entendendo seus processos com base em uma pesquisa qualitativa mediante revisão sistemática da literatura que levou a um amplo levantamento bibliográfico e documental. Os resultados alcançados por esta pesquisa apresentam a origem e evolução dos significados do termo, descreve o seu processo de construção na mente humana; a epistemologia disciplinar; alcança o posicionamento do conhecimento enquanto ativo organizacional e, finalmente entende o novo conceito conhecimento como um dos elementos intangíveis do capital intelectual, descortinando o caminho para atender ao objetivo deste estudo.

  15. A etnologia, ciência ou literatura?

    Directory of Open Access Journals (Sweden)

    Jacques Gutwirth

    2001-12-01

    Full Text Available Neste artigo o autor confronta o problema do valor científico da disciplina etnológica. Tomando como ponto de partida as reflexões epistemológicas de Jean Piaget, e passando pelo fato social total de Mauss, o autor considera os "trunfos" do método etnográfico (observação participante e entrevista aberta ao mesmo tempo que sublinha a necessidade de rigor e sistematismo, para mostrar sua grande utilidade atual, inclusive para o estudo de sociedades complexas. Enfim, o vai-e-vem entre as direções da pesquisa, os materiais encontrados em maior ou menor relação com estas direções, e as hipóteses de pesquisa depreendidas do sistema de pensamento do pesquisador devem permitir, por interações equilibradoras e estruturantes, por antecipação e feed-back, chegar a resultados científicos, sob a condição de haver um bom funcionamento do pesquisador que, descobrindo as conexões, ordena os processos complexos que estuda.

  16. Cave Canem ou attention au chien ?

    Directory of Open Access Journals (Sweden)

    Compagnone Maria Rosaria

    2014-07-01

    éritable corpus (parce que la recherche est toujours in progress nous sommes passés à notre analyse linguistique et à la classification des noms recueillis. Nous avons théorisé six groupes : 1 Noms du provider du type Alice1234567 ou Freebox-4D1234. C’est le choix des utilisateurs qui acceptent d’installer le Wi-Fi sans modifier le nom livré par le fournisseur d’accès Internet. 2 Patronymes auquel le noyau familial associe alors son nom. 3 Noms de BD, films, etc. Ce sont les choix qui comprennent les noms de BD, de dessins animés, des artistes et les inventions comme DragonBall ou Titeuf. 4 Noms de fantaisie. Dans cette catégorie rentrent les expressions inventées, les expressions crées avec des jeux de mots comme free et légumes (basé sur la quasi homophonie avec fruits et légumes. 5 Noms d’insultes. Dans la majorité des cas de vrais syntagmes, il s’agit de formes triviales très nombreuses qui s’adressent à tous les internautes qui pourraient essayer de pénétrer dans le réseau protégé ou qui pourraient simplement en visualiser le nom comme AllezVousFaireFoutre. 6 Admonitions. Des véritables menaces pour dissuader complètement chaque tentative d’effraction du type TuCliquesJeTeTue. Le nom des réseaux Wi-Fi est devenu donc une sorte de microcontenu qui exprime des idéologies ou met en garde le voisin qui cherche à squatter le réseau Wi-Fi et à monopoliser toute la bande passante. Un avertissement sur le genre de « cane cavem » et d’ailleurs le mot cyberespace introduit une nouvelle définition de l’espace sur le web, un espace qui, malgré son virtuel, reste privé et confidentiel.

  17. Une ou plusieurs sociologies ?

    Directory of Open Access Journals (Sweden)

    Nathalie Heinich

    2012-01-01

    Full Text Available Après une ébauche de diagnostic des causes et des effets de la « bulle » sociologique qui s’est créée en France dans la dernière génération, cet article reprend une tentative de cartographie des quatre grandes tendances de la sociologie telle qu’elle avait été proposée il y a quelques années dans la Revue du Mauss. Il s’agit de mettre en évidence, par-delà l’apparente homogénéité de la discipline intitulée « sociologie », deux grandes lignes de clivage : d’une part, l’opposition entre une « sociologie du social » et une « sociologie de l’expérience » ; d’autre part, une sociologie à visée normative et une sociologie analytico-descriptive. Une fois croisées, ces lignes dessinent quatre zones (ou familles sociologiques, entre quatre « points cardinaux » (ou positions idéal-typiques dont elles s’approchent plus ou moins. L’article se termine par un court plaidoyer en faveur d’une sociologie de l’expérience analytico-descriptive, en tant qu’elle est la plus spécifique de ce qu’autorisent les méthodes et les outils de cette discipline.¿Una o varias sociologías? Esbozo « cartográfico »Después de realizar un bosquejo del diagnóstico de las causas y de los efectos de la « burbuja » sociológica que se formó en Francia en el transcurso de la generación anterior, este artículo retoma una tentativa de « cartografía » de las cuatro principales tendencias de la sociología tal como había sido representada hace varios años en la Revue du Mauss. Se trata de poner en evidencia, más allá de la homogeneidad aparente de la materia llamada « sociología », dos grandes líneas de fractura: por una parte la oposición entre una « sociología de lo social » y una « sociología de la experiencia ». Por otra parte una sociología con objetivos normativos y una sociología analítico-descriptiva. Una vez cruzadas esas líneas aparecen cuatro zonas (o familias

  18. Die verbond - van Ou Testament na Nuwe Testament

    Directory of Open Access Journals (Sweden)

    H. F. van Rooy

    1983-06-01

    Full Text Available Die verbondsbegrip het in die Ou Testamentiese wetenskap weer ’n plek gekry op grond van die werk van Eichrodt en die studie van ooreenkomste tussen die verbond in die Ou Testament en die buite-Bybelse staatsverdrae, sedert die werk van Korosec,Mendenhall en baie ander. Natuurlik bestaan hieroor nie eenstemmigheid nie, veral omdat oor die ouderdom van die verbondsgedagte in die Ou Testament nie eenstemmigheid bestaan onder geleerdes nie. Die studie van die verbond in die Nuwe Testament het egter nie naastenby dieselfde aandag gekry nie - iets wat miskien as een van die redes vir die ontkenning van die waarde van die verbond vir Nuwe Testamentiese gelowiges beskou kan word. In hierdie studie word drie sake aangeraak, nl. die terminologie vir verbond in die Ou en Nuwe Testament, die agtergrond vir en belangrikste vorme van die verbond in die Ou Testament en enkele opmerkings oor die verbond in die Nuwe Testament.

  19. Die prediking oor die historiese stof van die Ou Testament

    Directory of Open Access Journals (Sweden)

    F. N. Lion-Cachet

    1989-06-01

    Full Text Available Uit ’n steekproef wat gedoen is uit die preke wat in Die Kerkblad (1986- 1987 verskyn het, blyk dit dat 40% van hierdie preke historiese stof uit die Ou Testament as teks gebruik het.

  20. Hermeneutiese uitdagings aan Christosentriese prediking vanuit Ou-Testamentiese narratiewe

    Directory of Open Access Journals (Sweden)

    Hendrik S.W. Strauss

    2014-02-01

    Full Text Available Baie predikers vind dit moeilik om Christus vanuit die Ou Testament te verkondig. Die probleem van Christosentriese prediking uit die Ou Testament is wesenlik ’n hermeneutiese probleem. In hierdie artikel word gepoog om ’n antwoord hierop te bied deur eerstens bepaalde ankers in ’n see van hermeneutiese moontlikhede te identifiseer. Hierdie ankers sluit in die Christelike karakter van die Ou Testament en die eenheid tussen die Ou en Nuwe Testament met ’n universele boodskap. Ten einde Christus op ’n geloofwaardige en verantwoordelike wyse vanuit die Ou Testament te preek, is ’n eksegetiese metode waarin rekening gehou word met die karakter van die Ou Testament, sowel as die verhouding daarvan tot die Nuwe Testament, onontbeerlik. Die holisties histories-kritiese metode dien, na ons mening, Christosentriese prediking uit die Ou Testament die beste, aangesien dit die literêre, historiese en teologiese aspekte van ’n teks verreken. Terwyl ’n verantwoordelike eksegetiese metode die basis lê vir Christosentriese prediking uit die Ou Testament, word daar ook ’n verkenning gedoen van sinvolle (organiese oorgange vanuit Ou-Testamentiese narratiewe na die Nuwe Testament. Aangesien Christosentriese prediking uit die Ou Testament nie sonder gevare is nie, word enkele slaggate ten opsigte daarvan uit die Ou-Testamentiese narratiewe uitgelig.Hermeneutical challenges encountered by Christ-centered preaching from Old Testament narratives. Many ministers find it difficult to preach Christ from the Old Testament. The problem of Christocentric preaching from the Old Testament is essentially a hermeneutical problem. In this article an answer is proposed, firstly by identifying specific anchors in a sea of hermeneutic possibilities. These include the Christian character of the Old Testament, and the unity between the Old and New Testaments with a universal message. In order to preach Christ in a credible and responsible manner from the Old

  1. Maria Pia Di Bella,Dire ou taire en Sicile

    OpenAIRE

    2012-01-01

    Dans ce livre, Maria Pia Di Bella présente une analyse des différentes stratégies de la parole dans des situations marginales: le fait de dévoiler ou d’occulter, le non-dit, le silence (omertà), le dit autrement, le parler en langues (glossolalie), le fait de narrer ou de témoigner, de chanter ou de poétiser. Le livre constitue le recueil de différents articles concernant la société méridionale italienne, publiés entre les années quatre-vingt et quatre-vingt-dix dans différentes revues scient...

  2. Effectiveness of NaOCl alone or in combination with EDTA on the diffusion of hydroxyl ions released by calcium hydroxide paste Efetividade do hipoclorito de sódio usado isoladamente ou em associação com o EDTA sobre a difusão de íons hidroxila liberados de pasta de hidróxido de cálcio

    Directory of Open Access Journals (Sweden)

    Mara Cristina Santos Felippe

    2006-01-01

    Full Text Available AIM: To evaluate the effect of different irrigant solutions employed during removal and replacement of calcium hydroxide paste on the diffusion of hydroxyl ions through root canal dentine in vitro. METHODOLOGY: Thirty-five maxillary and mandibular human canines with straight and fully developed roots were used. After mechanical preparation up to 1mm short of tooth length, 30 canals were filled with calcium hydroxide paste and 5 canals were left empty; all teeth had their coronal accesses properly sealed. Teeth were placed in plastic containers with distilled water, and pH was read after 30 days when the paste from 20 teeth was renewed. After removal of the paste by endodontic instrumentation and irrigation with distilled water, canals were replenished with newly mixed paste in Group 1 and 2. In these groups, final irrigation was conducted with 5 mL of EDTA followed by 5 mL of NaOCl in specimens in Group 1, and 5 mL of NaOCl only in specimens in Group 2. In 10 teeth the paste was not replenished at 30 days (Group 3. All specimens were returned to the containers with fresh distilled water, and the pH was recorded after another 30 days. The differences between the first (30d and second (60d pH readings were calculated and submitted to analysis of variance and individual comparisons using the Scheffeé's test. RESULTS: Results of mean analysis on differences of pH readings showed that greater diffusion had occurred on specimens in Group 3. Individual comparisons using Scheffeé's test showed statistical significance between Groups 2 and 3, and equivalence between all other groups. CONCLUSION: It was concluded that the use of EDTA did not enhance diffusion of hydroxyl ions through root canal dentine.OBJETIVO: O objetivo desta pesquisa foi comparar o efeito de diferentes irrigantes, usados durante a troca da pasta de hidróxido de cálcio, sobre a difusão de íons hidroxila. METODOLOGIA: Foram empregados 35 caninos humanos, com canais retos e ra

  3. Um estudo das edições de Ou isto ou aquilo, de Cecília Meireles A study of Cecília Meirelles' Ou isto ou aquilo editions

    Directory of Open Access Journals (Sweden)

    Norma Sandra de Almeida Ferreira

    2009-08-01

    Full Text Available Localizar em sua materialidade a obra Ou isto ou aquilo, de Cecília Meireles, em suas edições - 1964; 1969; 1977; 1987; 1990; 2002 -; cotejá-las para compreender as formas pelas quais os textos são apresentados aos seus leitores, em diferentes tempos; e indagar como e por que essas formas são pensadas e concretizadas são desafios deste artigo. Esta pesquisa de cunho exploratório, à luz, principalmente, dos estudos da História Cultural, privilegia, no exame das diferentes edições, as partes externas que envolvem os poemas (o texto propriamente dito e suas ilustrações. Identifica e discute a produção de sentidos e valores ligados à educação do leitor, ao reconhecimento de uma escritora consagrada pela tradição literária, à singularidade da linguagem, à importância de uma prática prazerosa da leitura.This article brings the challenges of locating Cecília Meireles' book Ou isto ou aquilo (Either this or that in its materialness, with considerations on its 1964, 1969, 1977, 1987, 1990 and 2002 editions, as well as comparing these editions in order to understand the forms in which texts are presented to their readers at different times, and questioning how and why these forms are conceived and put into practice. In the light of studies on cultural history, in the analysis of the different editions, this exploratory research prioritizes the external parts that involve poems (the texts themselves and their illustrations. It provides identification and a discussion on the production of senses and values related to readers' education, the recognition of a writer who is consecrated by literary tradition, the uniqueness of the language used, and the importance of pleasant reading practice.

  4. Restauration de Sapho ou Le Chant de Raoul Verlet

    Directory of Open Access Journals (Sweden)

    Lucie Courtiade

    2012-06-01

    Full Text Available L'étude de Sapho ou Le Chant, modèle de fonderie en plâtre élaboré par Raoul Verlet et conservé au Musée d'Angoulême depuis 1926, a permis d'aborder un sujet courant, celui des plâtres fracturés par l'expansion de la corrosion d'armatures internes causée par l'humidité. La principale intervention s'est axée sur le remontage des fragments nécessitant la conception d'une structure de remontage en acier inoxydable. Les interventions  structurelles ont été complétées par des collages simples ou renforcés des fragments de grandes dimensions.The study of Sapho ou Le Chant, a plaster cast foundry created by Raoul Verlet and preserved in the Angoulême Museum since 1926, has allowed to approach a common problematic, that one of split plaster cast by the expansion of steel reinforcements corrosion, caused by high humidity conservation conditions. The main intervention concerned the fragments reconstruction requiring the design and the execution of a stainless steel pedestal. The structural interventions was completed with simple and reinforced stickings of the larger fragments.

  5. Hydrogen gas production by combined systems of Rhodobacter sphaeroides O.U.001 and Halobacterium salinarum in a photobioreactor

    Energy Technology Data Exchange (ETDEWEB)

    Zabut, Baker; El-Kahlout, Kamal [Department of Biochemistry, School of Science, IUG, Gaza (PS); Yuecel, Meral [Department of Biology, Middle East Technical University, 06531 Ankara (Turkey); Guenduez, Ufuk; Tuerker, Lemi [Department of Chemistry, Middle East Technical University, 06531 Ankara (Turkey); Eroglu, Inci [Department of Chemical Engineering, Middle East Technical University, 06531 Ankara (Turkey)

    2006-09-15

    Rhodobacter sphaeroides O.U.001 is a photosynthetic non-sulfur bacterium which produces hydrogen from organic compounds under anaerobic conditions. Halobacterium salinarum is an archaeon and lives under extremely halophilic conditions (4M NaCl). H. salinarum contains a retinal protein bacteriorhodopsin in its purple membrane which acts as a light-driven proton pump. In this study the Rhodobacter sphaeroides O.U.001 culture was combined with different amounts of packed cells of H. salinarum S9 or isolated purple membrane fragments in order to increase the photofermentative hydrogen gas production. The packed cells of H. salinarum have the ability to pump protons upon illumination due to the presence of bacteriorhodopsin. The proton gradient produced may be used for the formation of ATP or protons may be used for H{sub 2} production by R. sphaeroides. Similar to intact cells purple membrane fragments may also form vesicles around certain ions and may act like closed systems. The hydrogen production experiments were carried out using 400ml water-jacketed-glass column stirred photobioreactors. In combined systems 10-200nmol of bacteriorhodopsin was used. Hydrogen gas production was enhanced by four- to sixfold in combined systems of H. salinarum packed cells with R. sphaeroides O.U.001 cell. Stirring both increased the total gas produced and enhanced the rate of hydrogen production. The light energy conversion efficiency was increased from 0.6% to 2.25% in combined systems. (author)

  6. Hemangioma rubi: doença ou simples achado?

    Directory of Open Access Journals (Sweden)

    Silva, Marcelo Campos Appel

    2006-01-01

    Full Text Available Objetivos: Realizar revisão da literatura sobre os hemangiomas rubi (HR e verificar qual seu significado clínico. Fonte de dados: Revisão da literatura nacional e internacional, através de pesquisa de livros de referência e artigos indexados no Medline, Scielo e LILACS. Síntese dos dados: Os HR têm elevada prevalência na população adulta, sendo a principal dermatose em idosos. Apresentam-se como pápulas esféricas, de cor vermelho brilhante ou violáceas, não-compressíveis à vitropressão, medindo cerca de 1-5 mm, assintomáticas, de distribuição variada no corpo, sendo encontradas mais freqüentemente no tronco. Ao exame histopatológico apresentam-se como proliferações vasculares, na derme, sob epiderme normal. A etiologia ainda não está completamente esclarecida. Embora usualmente benignos, seu achado pode sugerir associação com doenças sistêmicas. Conclusões: Os HR são dermatoses bastante freqüentes na população adulta, sendo queixa comum em consultas em ambulatório de dermatologia. Seu surgimento costuma ser imperceptível, pois se localiza em locais de difícil visualização, como dorso ou couro cabeludo. A observação das lesões é importante e, em caso de aumento do número, tamanho ou distribuição, é aconselhável procurar um dermatologista para revisão.

  7. Kystes hydatiques de la rate: chirurgie radicale ou conservatrice?

    Directory of Open Access Journals (Sweden)

    Abdelmalek Ousadden

    2010-06-01

    Full Text Available INTRODUCTION: Concernant l’hydatidose, la localisation splénique vient en 3ème position après le foie et les poumons. En l’absence de traitement médical réellement efficace, l’hydatidose splénique amène souvent à la chirurgie. L’apparition du traitement percutané et la tendance actuellement conservatrice de la chirurgie surtout pour une pathologie bénigne, remettent en cause la splénectomie radicale. METHODES: Notre travail rétrospectif, a porté sur 23 cas d’hydatidose splénique isolés ou multi-viscérale. Le diagnostic reposait principalement sur le couple échographie abdominale et sérologie hydatique. Ces patients ont bénéficié dans leur majorité d’une splénectomie ou d’une résection du dôme saillant du kyste. RESULTATS: La morbidité postopératoire a été plus importante en cas de résection du dôme saillant (une hémorragie d’origine splénique, 3 abcès sur cavité résiduelle et 2 récidives. La mortalité a été nulle. Nous proposons une classification qui permet de stratifier les indications opératoires en fonction du type de kyste hydatique de la rate. CONCLUSION: Le choix entre chirurgie radicale ou conservatrice reste difficile vu les contraintes de chacune, les complications postopératoires respectives et la diversité des situations cliniques. Notre classification facilite ce choix.

  8. Participação nos Lucros ou Resultados

    Directory of Open Access Journals (Sweden)

    Luiz Felipe Ferreira

    2007-03-01

    Full Text Available A participação nos lucros ou resultados é uma forma de remuneração variável, pela qual não há incidência de encargos sociais, além de incentivar o aumento da produtividade, podendo assim ser utilizada pelas empresas como estratégia, para enfrentarem os desafios dinâmicos e competitivos em que atuam. Esta pesquisa caracteriza-se como sendo exploratória, com abordagem qualitativa e tem como objetivo conceituar e explanar as formas pela quais são praticadas a participação nos lucros ou resultados em empresas do setor alimentício em Santa Catarina, que foram escolhidas por meio do critério de acessibilidade e disponibilidade. Dos dados coletados, pode-se verificar que as empresas: COC Alimentos, Moinho Catarinense e Pepsico do Brasil utilizam a participação nos resultados e a Perdigão utiliza a participação mista. A Moinho Catarinense distribui para todos os empregados um salário nominal, como a CDC Alimentos, exceto para os gerentes. A Perdigão beneficia todos os empregados, sendo que 60% da distribuição é pelo lucro líquido e 40% por indicadores de desempenho. A Pepsico do Brasil distribui aos empregados operacionais 50% de um salário nominal e para os empregados da administração central um salário nominal, atrelado ao cumprimento de metas, especificadas no programa de participação nos lucros ou resultados.

  9. Múltipla autoria: crescimento ou bolha inflacionária?

    Directory of Open Access Journals (Sweden)

    Kenneth Rochel de Camargo Jr.

    2012-10-01

    Full Text Available OBJETIVO: Analisar o aumento do número de autores por artigo em revistas científicas brasileiras de saúde coletiva. MÉTODOS: Foram pesquisados na base de dados LILACS artigos publicados em seis revistas de saúde coletiva e uma revista médica (para comparação, da coleção SciELO, com classificação Qualis, da Capes, igual ou superior a B-1, entre 1999 e 2010. Foram avaliadas a evolução da mediana de números de autores/artigo e a proporção de artigos com mais de quatro autores. Estimou-se a associação entre o triênio de publicação e a presença de quatro ou mais autores por artigo por meio de odds ratio de Mantel-Haenzel, ajustadas para o tipo de revista. RESULTADOS: Houve crescimento da mediana do número de autores e da proporção de artigos com mais de quatro autores para todas as revistas, principalmente no último triênio. As odds ratio para publicação de artigos com quatro autores ou mais, ajustadas para os tipo de revista, foram: segundo triênio: 1,3 (IC95% 1,1;1,4; terceiro triênio: 1,5 (IC95% 1,3;1,8; quarto triênio: 2,39 (IC95% 2,1;2,8. CONCLUSÕES: Periódicos científicos de saúde coletiva têm apresentado aumento no número de autores por artigo ao longo dos anos, independentemente da orientação editorial.

  10. The multivariate supOU stochastic volatility model

    DEFF Research Database (Denmark)

    Barndorff-Nielsen, Ole; Stelzer, Robert

    structure of the volatility, the log returns, as well as their "squares" are discussed in detail. Moreover, we give several examples in which long memory effects occur and study how the model as well as the simple Ornstein-Uhlenbeck type stochastic volatility model behave under linear transformations......Using positive semidefinite supOU (superposition of Ornstein-Uhlenbeck type) processes to describe the volatility, we introduce a multivariate stochastic volatility model for financial data which is capable of modelling long range dependence effects. The finiteness of moments and the second order...

  11. Transverse momentum of dimuons produced in p-U, O-U and S-U collisions at 200 GeV/nucleon

    Energy Technology Data Exchange (ETDEWEB)

    Guichard, A. (Institut National de Physique Nucleaire et de Physique des Particules, 69 - Lyon (France) Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire); Abreu, M.C.; Alimi, M.; Baglin, C.; Baldisseri, A.; Bedjidian, M.; Bordalo, P.; Bussiere, A.; Busson, P.; Cases, R.; Castor, J.; Chambon, T.; Charlot, C.; Caurand, B.; Contardo, D.; Descroix, E.; Devaux, A.; Drapier, O.; Fargeix, J.; Felgeyrolles, X.; Ferreira, R.; Force, P.; Fredj, L.; Gago, J.M.; Gerschel, C.; Gorodetzky, P.; Grosdidier, B.; Grossiord, J.Y.; Guillaud, J.P.; Haroutunian, R.; Jouan, D.; Kluberg, L.; Kossakowski, R.; Landaud, G.; Liaud, P.; Lourenco, C.; Papillon, S.; Peralta, L.; Pizzi, J.R.; Racca, C.; Ramos, S.; Romana, A.; Salmeron, R.A.; Silva, S.; Sonderegger, P.; Tarrago, X.; Varela, J.; Vazeille, F.; NA38 Collaboration

    1991-04-01

    Dimuon production in p-U, O-U and S-U collisions has been studied at 200 GeV/N. It is observed that < P{sub T} > and < p{sub T}{sup 2}> of the J/PSI transverse momentum distributions increase with the transverse energy of the ion induced reactions. Such a marked behaviour is not seen for muon pairs of the continuum. (orig.).

  12. Turismo sustentável no Brasil: utopia ou possibilidade?

    Directory of Open Access Journals (Sweden)

    Sarah Strachman Bacal

    2008-09-01

    Full Text Available Neste artigo, serão discutidas as relações entre o homem, o meio ambiente e a atividade turística, considerando que essa atividade está centrada, principalmente, na exploração dos recursos naturais e culturais de um local, região ou país. A sedução que o turismo exerce nas regiões de economia frágil e detentoras de recursos naturais atrativos induz ao pensamento da atividade como milagrosa para quebrar o círculo vicioso de estagnação da economia e representa a vinda de investimentos externos cada vez maiores. Nesse contexto, a atividade turística põe em movimento milhões de pessoas que procuram mobilizar seu tempo livre anual em viagens turísticas, buscando paisagens diferentes daquelas de seu cotidiano, e exercer atividades não impostas pelo ritmo de trabalho e pelo ambiente opressor dos centros urbanos. Para acompanhar esse ritmo, muitas localidades receptoras, inclusive no Brasil, empreendem uma espécie de corrida desenvolvimentista que não tem como prioridade a proteção da natureza, da cultura ou do bem-estar das comunidades envolvidas, configurando o turismo como destruidor dos lugares que o fazem existir.

  13. ULTRACAM photometry of the eclipsing cataclysmic variable OU Vir

    CERN Document Server

    Feline, W J; Marsh, T R; Stevenson, M J; Watson, C A; Brinkworth, C S

    2004-01-01

    We present high-speed, three-colour photometry of the faint eclipsing cataclysmic variable OU Vir. For the first time in OU Vir, separate eclipses of the white dwarf and bright spot have been observed. We use timings of these eclipses to derive a purely photometric model of the system, obtaining a mass ratio of q = 0.175 +/- 0.025, an inclination of i = 79.2 +/- 0.7 degrees and a disc radius of Rd/a = 0.2315 +/- 0.0150. We separate the white dwarf eclipse from the lightcurve and, by fitting a blackbody spectrum to its flux in each passband, obtain a white dwarf temperature of T = 13900 +/- 600 K and a distance of D = 51 +/- 17 pc. Assuming that the primary obeys the Nauenberg (1972) mass-radius relation for white dwarfs and allowing for temperature effects, we also find a primary mass Mw/Msun = 0.89 +/- 0.20, primary radius Rw/Rsun = 0.0097 +/- 0.0031 and orbital separation a/Rsun = 0.74 +/- 0.05.

  14. Parametric estimation of discretely sampled Gamma-OU processes

    Institute of Scientific and Technical Information of China (English)

    ZHANG Shibin; ZHANG Xinsheng; SUN Shuguang

    2006-01-01

    The stationary Gamma-OU processes are recommended to be the volatility of the financial assets. A parametric estimation for the Gamma-OU processes based on the discrete observations is considered in this paper. The estimator of an intensity parameter λ and its convergence result are given, and the simulations show that the estimation is quite accurate. Assuming that the parameter λ is estimated, the maximum likelihood estimation of shape parameter c and scale parameter α, whose likelihood function is not explicitly computable, is considered. By means of the Gaver-Stehfest algorithm, we construct an explicit sequence of approximations to the likelihood function and show that it converges the true (but unkown) one. Maximizing the sequence results in an estimator that converges to the true maximum likelihood estimator and the approximation shares the asymptotic properties of the true maximum likelihood estimator. Some simulation experiments reveal that this method is still quite accurate in most of rational situations for the background of volatility.

  15. PRESIDENCIALISMO INEFICIENTE OU PARLAMENTARISMO DE OCASIÃO?

    OpenAIRE

    CRUZ, PAULO MARCIO; Universidade do Vale do Itajaí - UNIVALI; Pasold, Cesar Luiz; Universidade do Vale do Itajaí - UNIVALI

    2016-01-01

    O presente texto tem por objeto nuclear a reflexão sobre o Sistema de Governo no Brasil, o Presidencialismo, na forma em que está concebido pela Constituição da República Federativa do Brasil, com destaque para a sua histórica incapacidade de encontrar soluções democráticas adequadas e rápidas à superação de Crises. As características do Parlamentarismo e sua presença efetiva em alguns Países que o adotam são descritas, estimulando reflexões a respeito de um Parlamentarismo de Ocasião, ou sej...

  16. Autonomia ou dependência da ciência

    OpenAIRE

    Morin, Edgar; Centre National de la Recherche Scientifique

    2008-01-01

    Em consequência do “caso Sokal”1 , a questão de saber em que condições se pode falar de autonomia ou de dependência da ciência retomou toda a sua virulência e, cabe afirmar, toda a sua pertinência. Muitos viram na mistificação de Sokal um teste de falsificação científica: falsificar o enunciado de um discurso para testar os critérios de reconhecimento da sua validade. Mas parece mais divertido de ver nisso, antes de tudo, um jogo de cena entre dois poderes bastante distintos: os “científicos”...

  17. Renouvellement ou crise de l’imaginaire capitaliste?

    Directory of Open Access Journals (Sweden)

    Wolfe, Harald

    2008-12-01

    Full Text Available Cette contribution met en question l’imaginaire capitaliste : son noyau chez Castoriadis – maîtrise (pseudo- rationnelle, organisation bureaucratique – et ses métamorphoses contemporaines. On a parlé d’un "nouvel esprit du capitalisme" (Boltanski/Chiapello: organisation en réseau, des projets, autonomie relative du travail. Ces mutations de l’idéologie managériale et le développement correspondant de l’institution de l’organisation et du travail signifient-ils un véritable renouvellement de l’imaginaire capitaliste? Ou bien ces changements, avec leurs contradictions et leurs limites, sont-ils, au contraire, l’indice d’une crise profonde de la capacité d’innovation et de mobilisation des significations imaginaires sociales centrales du capitalisme?

  18. Cuidar e pesquisar: práticas complementares ou excludentes?

    Directory of Open Access Journals (Sweden)

    Daher Donizete Vago

    2002-01-01

    Full Text Available Ao longo dos tempos, difundiu-se a concepção da Enfermagem empírica, estruturada no fazer, a qual se atualiza no cotidiano profissional, prejudicando a interdisciplinaridade entre cuidar, pesquisar e a construção de um saber específico que confira cientificidade às suas ações. Objetivamos conhecer as concepções dos enfermeiros sobre cuidar e pesquisar e analisar se essas práticas são complementares ou excludentes. Utilizamos observação participante e entrevistas semi-estruturadas com 10 enfermeiros de um hospital universitário, localizado no Estado do Rio de Janeiro. Os resultados apontaram discursos diferenciados sobre cuidar e pesquisar e, dificuldades em associar essas práticas que, para os enfermeiros, são, teoricamente, complementares e, no cotidiano profissional, excludentes.

  19. Tratamento Cirúrgico Conservador da Hidrossalpinge: Laparoscopia ou Microcirurgia?

    Directory of Open Access Journals (Sweden)

    Ribeiro Sérgio Conti

    2001-01-01

    Full Text Available Objetivos: analisar as taxas de gravidez após realização de correção laparoscópica e microcirúrgica de hidrossalpinge. Métodos: no período de julho de 1996 a maio de 1999, foram tratadas 39 pacientes com hidrossalpinge, segundo protocolo de pesquisa previamente aprovado. As pacientes foram distribuídas, por sorteio, em dois grupos, de acordo com o tipo de acesso cirúrgico a ser utilizado: salpingostomia laparoscópica ou por laparotomia. Para análise dos resultados, as pacientes foram estratificadas de acordo com o grau de lesão tubária e as taxas de gestação nos dois grupos foram anotadas durante um intervalo de 24 meses. Resultados: as taxas de gravidez foram de 35,3 e 33,3%, respectivamente, após laparoscopia e microcirurgia. Em relação à gravidade da lesão tubária, 66,7% das pacientes com lesões leves e 21,7% das pacientes com lesões moderadas obtiveram sucesso na concepção. As taxas cumulativas de gravidez em um e dois anos, respectivamente, foram de 25,0 e 34,4%. Houve um caso de gestação ectópica, correspondendo a 9,1% de todas as gestações. Conclusões: pacientes com lesão tubária leve ou moderada podem ser tratadas inicialmente por cirurgia e o sucesso na concepção é inversamente proporcional ao grau de acometimento tubário.

  20. Geology and hydrocarbon potential of the Oued Mya basin, Algeria

    Energy Technology Data Exchange (ETDEWEB)

    Benamrane, O.; Messaoudi, M.; Messelles, H. (Sonatrach Division Exploration, Algiers (Algeria))

    1993-09-01

    The Oued Mya hydrocarbon system is located in the Sahara basin. It is one of the best producing basins in Algeria, along with the Ghadames and Illizi basins. The stratigraphic section consists of Paleozoic and Mesozoic, and is about 5000 m thick. This intracratonic basin is limited to the north by the Toughourt saddle, and to the west and east it is flanked by regional arches, Allal-Tilghemt and Amguid-Hassi Messaoud, which culminate in the super giant Hassi Messaoud and Hassi R'mel hydrocarbon accumulations, respectively, producing oil from the Cambrian sands and gas from the Trissic sands. The primary source rock in this basin is lower Silurian shale, with an average thickness of 50 m and a total organic carbon of 6% (14% in some cases). Results of maturation modeling indicate that the lower Silurian source is in the oil window. The Ordovician shales are also source rocks, but in a second order. Clastic reservoirs are in the Trissic sequence, which is mainly fluvial deposits with complex alluvial channels, and the main target in the basin. Clastic reservoirs in the lower Devonian section have a good hydrocarbon potential east of the basin through a southwest-northwest orientation. The Late Trissic-Early Jurassic evaporites that overlie the Triassic clastic interval and extend over the entire Oued Mya basin, are considered to be a super-seal evaporite package, which consists predominantly of anhydrite and halite. For paleozoic targets, a large number of potential seals exist within the stratigraphic column. This super seal does not present oil dismigration possibilities. We can infer that a large amount of the oil generated by the Silurian source rock from the beginning of Cretaceous until now still is not discovered and significantly greater volumes could be trapped within structure closures and mixed or stratigraphic traps related to the fluvial Triassic sandstones, marine Devonian sands, and Cambrian-Ordovician reservoirs.

  1. Synthesis and characterization of {alpha}zirconium (IV) hydrogenphosphate containing metallic copper clusters; Sintese e caracterizacao de {alpha}-fosfato de zirconio(IV) contendo agregados de cobre metalico

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Alexilda Oliveira de [Universidade Estadual do Sudoeste da Bahia, Itapetinga, BA (Brazil). Dept. de Estudos Basicos e Instrumentais; Rangel, Maria do Carmo [Bahia Univ., Salvador, BA (Brazil). Inst. de Quimica. Dept. de Fisico-Quimica; Alves, Oswaldo Luiz [Universidade Estadual de Campinas, SP (Brazil). Inst. de Quimica. Dept. de Quimica Inorganica]. E-mail: alexilda@uesb.br

    2005-02-01

    The {alpha}-zirconium (IV) hydrogenphosphate ({alpha}-ZrP) has received great attention in the last years due to its properties like ion exchange, intercalation, ionic conductivity and catalytic activity. This work reports a method to produce metallic copper clusters on {alpha}-ZrP to be used as catalysts in petrochemical processes. It was found that the solids were non-crystalline regardless of the uptake of copper and the reduction. The specific surface area increased as a consequence of the increase of the interlayer distance to accept the copper ions between the layers. During the reduction, big clusters of copper (0,5-11{mu}) with different sizes and shapes were produced. (author)

  2. Ion-Ion Neutralization.

    Science.gov (United States)

    1980-12-31

    plasma were identified using a downstream quadrupole mass spectrometer. In these experimento it is a simple matter to establish H+(H 2 0):f as the...pressure as predicted by the Thomson t2rnary mechanism whicK hzr been suownr to be valid experimentally at hiTh rrsurs (,han and Peron, 1:EI4 hereafter t...of NO , NO2 ions in various gases and the ternary recombination coefficients of these ions in the higher pres:;ure ( Thomson ) re"ie. Equation (5) cr>n

  3. Daumier : émigrants ou fugitifs ?

    Directory of Open Access Journals (Sweden)

    Jean-Philippe Chimot

    2007-09-01

    Full Text Available Daumier nous a laissé quatre toiles et un relief, de petits formats, réalisés entre 1850 et 1870, que l’on a intitulés Emigrants ou Fugitifs. Si l’artiste, sensible à la figuration des drames et conflits du siècle, n’a pas eu droit aux bénéfices de la commande (publique ou privée, il a aussi échappé aux mensonges optimistes des visions officielles et à l’autosatisfaction des « élites ». Dans ces œuvres ébauchées, il saisit l’émigration comme déplacement collectif harassant et incertain. Sa manière et sa matière découvrent ainsi et rejoignent le poids historique des immenses pérégrinations auxquelles elles font une allusion mystérieuse.Daumier nos ha dejado cuatro telas y un relieve de pequeño formato, tituladas Emigrantes y también Fugitivos, realizadas entre 1850 y 1870. Si el artista, sensible a la figuración de los dramas y conflictos del siglo, no tuvo derecho a los beneficios de los encargos (públicos o privados también pudo escapar de las mentiras optimistas de las visiones oficiales y de la auto-satisfacción de las «elites». En sus bosquejos capta la emigración como un desplazamiento colectivo agotador e incierto. De esta manera sus formas y materias descubren y se reencuentran con el peso histórico de las inmensas peregrinaciones a las que aluden de forma misteriosa.Daumier left behind four painting and a landscape in small formats, completed between 1850 to 1870, entitled Emigrants or Fugitives. If the artist, who was sensitive to the aesthetic dimension of thecentury's dramas and conflicts, did not financially benefit from his public or private commands, he also avoided the optimistic lies of official viewings and the self-satisfaction of “elites”. In his sketched-out works, he interpreted emigration as a collective displacement, both troubling and uncertain. His manner and his material thus brought to light were fused with the historical weight of the immense voyages that his work

  4. Kubrick com Foucault ou O Desvio do Panoptismo

    Directory of Open Access Journals (Sweden)

    Ivan Capeller

    2011-01-01

    Full Text Available O panoptismo - um conceito fundamental para a compreensão da formação e do funcionamento das sociedades disciplinares ocidentais a partir dos séculos XVII-XVIII - apareceu em meados dos anos 70 nas análises empreendidas por Michel Foucault, em Vigiar e Punir, de um dispositivo carcerário setecentista então pouco estudado - o panopticum de Jeremy Bentham. Este artigo procede a uma releitura da teoria foucaultiana do panoptismo em que a crítica do dispositivo panóptico é retomada a partir do filme A Laranja Mecânica de Stanley Kubrick, enfatizando metodologicamente a relevância da ficção-científica, como um gênero,  na elaboração teórica das passagens e processos de transição que podemos observar entre as já conhecidas e estudadas formas disciplinares de sociedade e uma possível, ou suposta, sociedade porvir do controle. 

  5. Videogame: é do bem ou do mal? Como orientar pais

    Directory of Open Access Journals (Sweden)

    Luciana Alves

    2011-06-01

    Full Text Available Desde a década de 70 milhares de crianças, adolescentes e adultos praticam jogos de computador ou videogame. O objetivo deste artigo foi identificar os efeitos deste artefato tecnológico para a cognição, sua aplicabilidade e sua influência sobre o comportamento e a saúde do jogador e, desta forma, delinear orientações para pais e profissionais de saúde que lidam com crianças e adolescentes. Na primeira parte do artigo são apresentados alguns efeitos negativos e positivos dos jogos; na segunda é proposto um conjunto de orientações que podem tornar a brincadeira mais segura; e na última parte, as considerações finais. Concluiu-se que o videogame é uma ferramenta capaz de aperfeiçoar as habilidades cognitivas e perceptivas, sendo os jogos educacionais apontados como uma experiência benéfica aos seus usuários, e que as repercussões negativas se referem, principalmente, ao efeito daqueles com conteúdo de violência.

  6. Qualidade de vida, ponto de partida ou resultado final?

    Directory of Open Access Journals (Sweden)

    Alby Duarte Rocha

    Full Text Available O que é qualidade de vida e o quanto podemos medir dela? Pensa-se em qualidade de vida como resultado das políticas públicas e desenvolvimento de uma sociedade, onde os determinantes socioambientais se manifestam como atributo de seus atores. Ao mesmo tempo, pode-se entender esta idéia no outro extremo da análise, a partir da percepção de uma população protagonista de sua realidade, do que vem a ser qualidade de vida segundo ela mesma. Partindo-se dos aspectos conceituais de qualidade de vida, passou-se a adotar os conceitos de diferenciais intra-urbanos como a melhor maneira de caracterizar os desajustes e as desigualdades urbanas, para assim entender os componentes da iniqüidade desse meio. A primeira iniciativa marcou a utilização do método genebrino ou distancial. Hoje, já na segunda versão desse método, incorporou-se a esse contexto outras metodologias que possibilitam maior consistência de análise para ampliar a validade dessas medições. Soma-se a esse contexto, a análise de cluster e o Sistema de Informações Geográficas, tanto no cenário intra-urbano, quanto intermunicipal.

  7. Le CERN, chance ou risque pour Genève

    CERN Document Server

    Maiani, Luciano; Wenninger, Horst; CERN. Geneva

    1998-01-01

    Le CERN, Chance ou Risque pour Gen?ve? D?bat public contradictoire organis? avec le soutien de la Tribune de Gen?ve Lieu: Salle II, CICG,15 Rue de Varemb?. Date: Lundi 19 octobre 1998, 20h00 D?roulement de la soir?e: 1. Ouverture M. Ren? KÏchlin, Pr?sident du Grand Conseil M. Luciano Maiani, Directeur g?n?ral d?sign? du CERN 2. Introduction: Un regard critique sur le CERN (? d?signer) Le projet LHC (Manfred Buhler Broglin CERN) 3. D?bat th?matique men? par le mod?rateur (Marco Cattaneo, r?dacteur en chef de la Tribune de Gen?ve) entre trois representants de lÕopinion publique (Ren? Longet, d?put? socialiste; Yves de Pr?ville, physicien; Jacques Mirenowicz, chercheur) et trois repr?sentants du Cern (Horst Wenninger, Directeur de la Recherche/Technique, CERN; Manfred Buhler Broglin, Administra-teur du projet LHC, CERN; Maurice Bourquin, Professeur de Physique ? l'Universit? de Gen?ve et D?l?gu? de la Suisse au Conseil du CERN). Les th?mes abord?s seront: Ð A quoi sert le CERN? Ð Quel est lÕimpact ?conomiqu...

  8. Hong-Ou-Mandel Interference in Circuit QED Experiments

    Science.gov (United States)

    Woolley, Matthew; Lang, Christian; Eichler, Christopher; Wallraff, Andreas; Blais, Alexandre

    2012-02-01

    The Hong-Ou-Mandel (HOM) effect is a quantum interference effect whereby two indistinguishable photons incident at either side of a balanced beam splitter will be detected together at one output port or the other, but never with one photon at each output port. Such experiments have long been performed in the optical domain, but recent developments have raised the possibility of performing such experiments in the microwave domain, using linear amplifiers and quadrature amplitude detectors instead of photon counting [Bozyigit et al., Nat. Phys. 7, 154-158 (2010)]. Here we determine the signature of HOM interference in a system consisting of two independent circuit QED systems out-coupled into an on-chip microwave beam splitter. We have calculated the beam splitter output intensity auto- and cross-correlations for both trains of pulsed Lorentzian photons, and continuously-driven sources based on photon blockade. The HOM interference is manifest as antibunching in the output intensity cross-correlation. Controllable distinguishability may be introduced via a time delay in the pulsed case, or via a frequency offset in the continuously-driven case. The frequency offset leads to a quantum beat effect. Preliminary experimental results will be discussed.

  9. Quartier durable ou éco-quartier ?

    Directory of Open Access Journals (Sweden)

    Benoît Boutaud

    2009-09-01

    Full Text Available Le terme d’éco-quartier est aujourd’hui largement utilisé par les professionnels de l’urbanisme comme par la presse et se trouve souvent utilisé comme synonyme de quartier durable. Tous deux désigneraient ces projets d’urbanisme ayant des objectifs environnementaux, sociaux et économiques ambitieux qui se multiplient en France depuis quelques années. Toutefois, dans la pratique, cette synonymie est loin de faire l’unanimité. Sont-ce des quartiers durables, des éco-quartiers ou les deux ? C’est sur cette question de vocabulaire que cet article souhaite se pencher alors même que l’objet qu’ils sont sensés décrire reste lui-même encore à définir précisément. Ceci en axant particulièrement cette interrogation sur la pertinence de l’utilisation de l’expression d’éco-quartier pour désigner ces nouveaux morceaux de ville créés dans un nouveau contexte de réflexion environnementale et humaine. Nous partirons pour cela des diverses utilisations qui en sont faites en tenant compte du contexte matériel, théorique et temporel, dans lequel ces nouveaux éléments de l’urbanisme s’insèrent. Nous verrons également que l’utilisation qui en est faite résonne au delà d’une simple question sémantique.

  10. Développement territorial autonome ou assisté

    Directory of Open Access Journals (Sweden)

    Gaël Lagadec

    2010-11-01

    Full Text Available L'économie calédonienne est emplie de contradictions : retard de développement, protectionnisme sans TVA, émancipation politique (Accord de Nouméa mais faible taux de couverture et importants transferts de la métropole… Cet article analyse, d'un point de vue fiscal, la soutenabilité du système néo-calédonien actuel : comment peut-il perdurer sans crise structurelle ? Quelle réforme fiscale proposer ? La section 1 justifie la réforme. La section 2 décrit le système économico-commercial calédonien. La section 3 présente les principes de la TVA ; la section 4 ceux de la TVA sociale. La section 5 analyse la substitution d'une fiscalité douanière par une TVA fiscale ou sociale.New-Caledonia's economy concentrates many contradictions: under development, protectionism, no VAT, political emancipation but high financial transfers from France… This paper analyses, from a taxation point of view, the sustainability of the current New-Caledonian economic system: how could this system persist without any structural crisis? Which tax reform should be proposed? The section 1 explains why tax reform is necessary. The section 2 describes New-Caledonia's economic and commercial system. The sections 3 and 4 present the principles of the VAT and of the social VAT. The section 5 analyses the opportunity to change New-Caledonia's customs tax for a VAT or a social VAT.

  11. Altermondialisme : contre-pouvoir global ou grande alternative ?

    Directory of Open Access Journals (Sweden)

    Eddy Fougier

    2013-01-01

    Full Text Available L’altermondialisme est une notion difficile à cerner. On peut y voir un mouvement de la société civile globale, un mouvement social mondial, le nouveau grand mouvement d’émancipation, le refuge des antilibéraux ou bien encore l’un des symptômes de la renaissance de la critique du capitalisme. Il est néanmoins possible de le définir comme une nébuleuse de mouvements de la société civile qui partagent une même opposition à la « mondialisation libérale » et aspirent à une autre globalisation, cherchant à articuler les actions qu’ils mènent à l’échelon local et national à des enjeux globaux en s’accordant sur le caractère central des forums sociaux. Ces mouvements ont donc pour caractéristique d’établir un même constat sur l’état du monde et de proposer des réformes dans quatre domaines spécifiques : la mise en place d’un nouvel ordre économique global, la sauvegarde des biens communs, l’instauration de nouvelles formes de régulation et de gouvernances globales et la défense d’un véritable développement durable. En définitive, même si l’altermondialisme ne changera vraisemblablement pas la face du monde, il joue néanmoins un rôle important de contre-pouvoir global face aux principales puissances économiques.

  12. Anhembitinerários ou algum modernismo passado a limpo

    Directory of Open Access Journals (Sweden)

    George Luiz França

    2007-06-01

    Full Text Available Pergunta semelhante à feita por Deleuze e Guattari ao começar sua leitura de Kafka2 parece pertinente ao pleitear uma leitura de periódico como texto. Como entrar em Anhembi? Qual seria o ponto de partida a adotar? Itinerários. Multiplicam-se, cruzam-se, entremeiam-se, e proliferam, outrossim, as entradas. Para cada uma delas, caminhos que se bifurcam, vertiginosamente, e redundam sempre num labirinto, tão ao gosto borgiano. Livro-labirinto, rizoma sem início nem fim, em expansão qual o universo. A angústia de uma deliberação, para lembrar de Barthes3, e a certeza de uma perda irreconciliável. Sempre restarão espectros a circundar o discurso, neste caso, um discurso sobre discursos de amarelas páginas de memória. De memória e de esquecimentos. A cada opção, uma rasura; a cada dito, muitos interditos, não-ditos, desditos, malditos. Ciente da aventura irreversível de leitura por onde recaem estas veredas bífidas que se abrem através do tempo, na sobreposição de um passado incessante, de um presente já passado e de um futuro fantasmagórico, aventuro um primeiro passo, no limiar das lucubrações, ficções sobre ficções que se pretendem reais e que mais irreais se tornam quanto mais delas me aproximo e me afasto, como quem procura um ponto de foco ou a anestesia de um ponto cego.

  13. Nd:YAG laser associated with metal salts solutions in the treatment of dentinal hypersensitivity; O laser de Nd:YAG associado a solucoes de sais metalicos no tratamento da hipersensibilidade dentinaria

    Energy Technology Data Exchange (ETDEWEB)

    Glauche, Carlos Eugenio Correia

    2001-07-01

    The objective of this study was to observe the ultrastructural changes caused by the radiation of Nd:YAG laser on the tooth tissue and determine qualitatively the presence of Sn{sup ++}, Sr{sup ++} and F{sup -}, inside the dentin, being it irradiated or not. Ten molar teeth recently extracted were cut into 2 mm discs. The samples were soaked in a EDTA solution at 17% for 2 minutes and divided into five groups. Group I: the samples were irradiated with Nd:YAG laser (1,5 W, 100 mJ, 15 Hz, 150 {mu}s and 125 J/cm{sup 2}) and after that, a treatment with an SnF{sub 2} aqueous solution at 10% for 30 minutes. Group II: the samples got laser irradiation with the same parameters and then a treatment with an SrCl{sub 2} solution at 10% as a toothpaste (Sensodyne{sup TM}) for 30 minutes. Group III: the samples just got a treatment with a SnF{sub 2} aqueous solution at 10% for 30 minutes. Group IV: the samples just got a treatment with a SrCl{sub 2} toothpaste (Sensodyne{sup TM}) for 30 minutes. Group V: samples that just got laser irradiation in the parameters above mentioned. Then, all samples were prepared for scanning electronic microscopy (SEM) and the samples of groups I, II, III and IV for energy dispersive X-ray microanalysis (EDX). The ultrastructure aspect of the dentin showed the surface totally altered by the irradiation. Pits and whitish globules were found amidst an heterogenous and rough structure, due to the melting and resolidification of the dental structure. Craters were also observed. Carbonization areas were absent. Ions Sn{sup ++} were found at a depth of 250 {mu}m in the samples of group I (Nd:YAG + SnF{sub 2}), whereas in the samples of group III, Sn{sup ++} were not found deeper than 100 {mu}m. Sr{sup ++} could be detected at least at 500 {mu}m in the inner dentin in the samples of group II (Nd:YAG + SrCl{sub 2}). However, Sn{sup ++} were not found at 50 {mu}m in group IV samples. Ions F{sup -} were just found in the irradiated samples of group I

  14. Alergias a alimentos ou a derivados usados como excipientes em medicamentos

    OpenAIRE

    Gonçalves, Liliana Alexandra Alves

    2016-01-01

    Aditivos químicos têm como principal objetivo melhorar os produtos industrializados, como fármacos, conferindo-lhes cor, aroma, textura, conservação, entre outros. Os aditivos utilizados na indústria farmacêutica são denominados excipientes, completando a massa ou o volume especificado no medicamento. São considerados substâncias inativas, uma vez que não apresentam propriedades curativas ou preventivas de doenças ou dos seus sintomas. No âmbito deste trabalho, foi realizado uma revisão bi...

  15. Ion Colliders

    CERN Document Server

    Fischer, W

    2014-01-01

    High-energy ion colliders are large research tools in nuclear physics to study the Quark-Gluon-Plasma (QGP). The range of collision energy and high luminosity are important design and operational considerations. The experiments also expect flexibility with frequent changes in the collision energy, detector fields, and ion species. Ion species range from protons, including polarized protons in RHIC, to heavy nuclei like gold, lead and uranium. Asymmetric collision combinations (e.g. protons against heavy ions) are also essential. For the creation, acceleration, and storage of bright intense ion beams, limits are set by space charge, charge change, and intrabeam scattering effects, as well as beam losses due to a variety of other phenomena. Currently, there are two operating ion colliders, the Relativistic Heavy Ion Collider (RHIC) at BNL, and the Large Hadron Collider (LHC) at CERN.

  16. Hong-Ou-Mandel experiment for temporal investigation of single-electron fractionalization

    National Research Council Canada - National Science Library

    Freulon, V; Marguerite, A; Berroir, J-M; Plaçais, B; Cavanna, A; Jin, Y; Fève, G

    2015-01-01

    .... Here we use two-particle interferences in the electronic analogue of the Hong-Ou-Mandel experiment in a quantum Hall conductor at filling factor 2 to probe the fate of a single electron emitted...

  17. Au fil du temps (1976 ou la loi du seuil

    Directory of Open Access Journals (Sweden)

    Isabelle Singer

    2010-04-01

    Full Text Available Ayant choisi de vivre dans un camion, les héros d’Au fil du temps (film de Wim Wenders de 1976 font du seuil une expérience particulière. Celle de la rupture avec toute idée de foyer et celle du refus d’appartenance à la terre natale, cette terre allemande traversée par une frontière le long de laquelle ils vont voyager, et qui les renvoie à chaque instant aux traumatismes de l’Histoire. Sur le pare-brise du camion, l’extérieur (campagnes indifférenciées, villes à l’abandon… et l’intérieur se superposent. Au fil du temps questionne le paysage : il s’agit d’en décoller un à un les mythes qui le recouvrent. L’image alors n’est plus surface mais volume à traverser, à lacérer et découvrir ce qui est tissé dans le paysage. La démarche de Wenders est alors proche de celle d’un de ses contemporains : Anselm Kiefer. Le paysage allemand provoque le rejet parce qu’il y a là toujours plus que le visible : des strates et des strates de culpabilité que le mythe - et c’est sa fonction - a recouvert. Et qu’il s’agira ici, de soulever. Le choix du nomadisme, c’est celui d’un état de l’humanité antérieur à l’idée de patrie. Et c’est aussi celui de la solitude, comme prix à payer à ce refus d’appartenance et à cette mise à jour des mythes. L’appartenance à la terre allemande et à son Histoire est profondément problématique parce que les pères sont fondamentalement coupables. On se reconnaîtra alors des pères de substitution : des pères de cinéma (Nicholas Ray ou Fritz Lang. Et l’on substituera l’Histoire du cinéma à l’Histoire. Bruno est réparateur ambulant de projecteurs et Au fil du temps dressera, au gré de ses pérégrinations, un état des lieux du cinéma allemand des années soixante-dix : déliquescent, colonisé par les images hollywoodiennes. Il faut que cela change : état du cinéma ; état des protagonistes solitaires en quête d’une identit

  18. Ion Chromatography.

    Science.gov (United States)

    Mulik, James D.; Sawicki, Eugene

    1979-01-01

    Accurate for the analysis of ions in solution, this form of analysis enables the analyst to directly assay many compounds that previously were difficult or impossible to analyze. The method is a combination of the methodologies of ion exchange, liquid chromatography, and conductimetric determination with eluant suppression. (Author/RE)

  19. The Analysis of“Chen Ou Style”:A Memetic Perspective

    Institute of Scientific and Technical Information of China (English)

    CHEN Jian-feng

    2015-01-01

    “Chen Ou Style”is one of the most popular discourses and widely used by many people in communication. In this pa⁃per, it is analyzed from a memetics perspective that regards“Chen Ou Style”as a strong meme. The purpose is to find out the in⁃ternal generating mechanism for a meme to become successful, to reveal the evolution process of language, and to provide some useful guidelines and references for better language use. It is concluded that the replication and transmission of“Chen Ou Style”indicates the existence of language memes, and memetics provides a new perspective for the analysis of language imitation, trans⁃mission, change and development.

  20. FOTODEPOSICION DE PELICULAS DELGADAS DE METALES Y OXIDOS METALICOS.

    OpenAIRE

    TEJOS REBOLLEDO, MARISOL

    1999-01-01

    Se investigó la fotoquímica de los complejos -dicetonatos y alquiltropolonatos en estado sólido con miras a desarrollar un nuevo método para la deposición fotolitográfica de metales y óxidos de cobre, níquel y uranio. Con este objetivo se sintetizó aproxi 125p.

  1. Sous-espaces de Mouvements Articulés ou Contraints et leurs Signatures

    OpenAIRE

    2014-01-01

    National audience; Les objets articulés ou à trajectoires contraintes représentent une grande part des objets de notre quotidien. La détection automatique de ces restrictions de mouvement entre objets et l'extraction des paramètres correspondant est donc importante, p. ex. pour augmenter une reconstruction 3D statique avec des paramètres dynamiques tels qu'axes de rotation, ou directions possibles de translation de certains objets. C'est pourquoi nous présentons ici une nouvelle théorie pour ...

  2. Ion focusing

    Energy Technology Data Exchange (ETDEWEB)

    Cooks, Robert Graham; Baird, Zane; Peng, Wen-Ping

    2017-01-17

    The invention generally relates to apparatuses for focusing ions at or above ambient pressure and methods of use thereof. In certain embodiments, the invention provides an apparatus for focusing ions that includes an electrode having a cavity, at least one inlet within the electrode configured to operatively couple with an ionization source, such that discharge generated by the ionization source is injected into the cavity of the electrode, and an outlet. The cavity in the electrode is shaped such that upon application of voltage to the electrode, ions within the cavity are focused and directed to the outlet, which is positioned such that a proximal end of the outlet receives the focused ions and a distal end of the outlet is open to ambient pressure.

  3. Prediking oor die poëtiese stof van die Ou Testament - Die Psalms

    Directory of Open Access Journals (Sweden)

    E. J. Smit

    1989-06-01

    Full Text Available ’n Belangrike rede waarom die prediking uit die Psalms ’n aparte bespreking regverdig, is die feit dat die Psalms die omvangrykste verteenwoordiging van poetiese stof in die Ou Testament be vat. Dit is nie vir almal ewe maklik om poesie te lees en te verklaar nie.

  4. Effets des extraits ou de la poudre de Spirulina platensis et Jatropha ...

    African Journals Online (AJOL)

    SARAH

    30 juin 2015 ... générale, les extraits ou la poudre de Spirulina platensis ont eu des ... 49.12 % and 48.29%, the number of fruits per plant by 43% and 43.45%, the fruit biomass by ..... Interactions of Jatropha curcas plantation with ecosystems. Proceeding of International. Conference on Energy and Environment, March.

  5. Sinais não-verbais da dissimulação: inatos ou adquiridos?

    Directory of Open Access Journals (Sweden)

    Mônica Portella

    2014-05-01

    Full Text Available A dissimulação pode ser descoberta devido a fatos ou pessoas, ou em função da conduta de quem dissimula. Este estudo objetivou verificar: 1 Se o comportamento não-verbal de deficientes visuais é diferente do de pessoas com visão normal ao dissimular. 2 Se o treinamento é capaz de melhorar a habilidade de identificação da dissimulação por meio do comportamento não-verbal. Foi realizada uma pesquisa, onde pessoas com deficiência visual e com visão normal (“atores” deveriam dissimular e falar a verdade. Estudantes de Psicologia (juízes deveriam identificar, por intermédio de vídeos, se os “atores” estavam dissimulando ou não. Primeiramente, juízes sem treinamento avaliavam se os “atores” estavam ou não dissimulando. Posteriormente, recebiam treinamento sobre pistas não-verbais de dissimulação, para avaliar mais uma série de vídeos. Os resultados mostraram que o comportamento não-verbal de deficientes visuais é diferente ao dissimular e que o treinamento melhora a habilidade dos juízes em identificar a dissimulação.

  6. Gas physical conditions and kinematics of the giant outflow Ou4

    Science.gov (United States)

    Corradi, Romano L. M.; Grosso, Nicolas; Acker, Agnès; Greimel, Robert; Guillout, Patrick

    2014-10-01

    Context. The recently discovered bipolar outflow Ou4 has a projected size of more than one degree in the plane of the sky. It is apparently centred on the young stellar cluster - whose most massive representative is the triple system HR 8119 - inside the H ii region Sh 2-129. The driving source, the nature, and the distance of Ou4 are not known. Aims: The basic properties of Ou4 and its environment are investigated to shed light on the origin of this remarkable outflow. Methods: Deep narrow-band imagery of the whole nebula at arcsecond resolution was obtained to study the details of its morphology. Long-slit spectroscopy of the bipolar lobe tips was secured to determine the gas ionisation mechanism, physical conditions, and line-of-sight velocities. An estimate of the proper motions at the tip of the south lobe using archival plate images was attempted. The existing multi-wavelength data for Sh 2-129 and HR 8119 were also comprehensively reviewed. Results: The observed morphology of Ou4, its emission-line spatial distribution, line flux ratios, and the kinematic modelling developed adopting a bow-shock parabolic geometry, illustrate the expansion of a shock-excited fast collimated outflow. The observed radial velocities of Ou4 and its reddening are consistent with those of Sh 2-129 and HR 8119. The improved determination of the distance to HR 8119 (composed of two B0 V and one B0.5 V stars) and Sh 2-129 is 712 pc. We identify in WISE images at 22 μm an emission bubble of 5' radius (1 pc at the distance above) emitted by hot (107 K) dust grains, located inside the central part of Ou4 and corresponding to several [O iii] emission features of Ou4. Conclusions: The apparent position of Ou4 and the properties studied in this work are consistent with the hypothesis that Ou4 is located inside the Sh 2-129 H ii region, suggesting that it was launched some 90 000 yr ago by HR 8119. The outflow total kinetic energy is estimated to be ≈4 × 1047 ergs. However, we cannot

  7. GLICOMANANO ESTERIFICADO EM RAÇÕES PARA FRANGOS CONTENDO MILHO OU SORGO EXPERIMENTALMENTE CONTAMINADAS POR FUNGOS OU COM AFLATOXINA B1

    OpenAIRE

    2009-01-01

    Foram realizados dois experimentos com 960 pintos Cobb 500 criados em baterias aquecidas até 21 dias. No primeiro experimento, as aves foram alimentadas com rações com grãos de milho e de sorgo não-mofados e mofados, tratados ou não com adsorvente de micotoxinas a base de glicomanano esterificado (GME) nas concentrações de 0 e 0,1% da dieta. O experimento foi conduzido no delineamento inteiramente casualizado em esquema fatorial 2 x 2 x 2 (grão x qualidade x adsorvente) e cinco repetições de ...

  8. [Gao Jingyi. Han yu yu bei Ou yu yan : Han yu yu Wula'er yu yan ji Yin Ou yu yan tong yuan tan jiu] / Ago Künnap

    Index Scriptorium Estoniae

    Künnap, Ago, 1941-

    2010-01-01

    Arvustus: Gao Jingyi. Han yu yu bei Ou yu yan : Han yu yu Wula'er yu yan ji Yin Ou yu yan tong yuan tan jiu = Chinese language and languages of northern Europe. Beijing : Zhongguo she hui ke xue chu ban she, 2008

  9. [Gao Jingyi. Han yu yu bei Ou yu yan : Han yu yu Wula'er yu yan ji Yin Ou yu yan tong yuan tan jiu] / Ago Künnap

    Index Scriptorium Estoniae

    Künnap, Ago, 1941-

    2010-01-01

    Arvustus: Gao Jingyi. Han yu yu bei Ou yu yan : Han yu yu Wula'er yu yan ji Yin Ou yu yan tong yuan tan jiu = Chinese language and languages of northern Europe. Beijing : Zhongguo she hui ke xue chu ban she, 2008

  10. ERNAUX OU LA TRAVERSÉE DES GENRES : ENTRE PASSION SIMPLE ET SE PERDRE ERNAUX OU LA TRAVERSÉE DES GENRES : ENTRE PASSION SIMPLE ET SE PERDRE

    Directory of Open Access Journals (Sweden)

    Joelle Papillon

    2012-10-01

    Full Text Available Passion simple et Se perdre : l’oeuvre d’Annie Ernaux semble vouloir se penser en paire. Dans le cas de ces deux dernières paires, la filiation des textes se fait encore plus serrée, au point presque de fusionner en un seul texte publié deux fois, d’abord sous la forme de récit (biographique, autobiographique ou autofictif, puis sous celle dite de « texte brut » du journal intime.Passion simple et Se perdre : l’oeuvre d’Annie Ernaux semble vouloir se penser en paire. Dans le cas de ces deux dernières paires, la filiation des textes se fait encore plus serrée, au point presque de fusionner en un seul texte publié deux fois, d’abord sous la forme de récit (biographique, autobiographique ou autofictif, puis sous celle dite de « texte brut » du journal intime.

  11. Cycles optimaux pour des lignes de traitement de surface à trois cuves avec marges infinies ou nulles

    OpenAIRE

    2002-01-01

    National audience; Dans cette communication, nous démontrons que, pour une ligne de traitements de surface comportant trois cuves, les cycles optimaux sont des 1-cycles ou des 2-cycles, si les tolérances sur les durées de trempe sont nulles ou infinies et les temps de trempe minimaux égaux.

  12. Tratamento da parada cardíaca experimental com adrenalina, vasopressina ou placebo

    Directory of Open Access Journals (Sweden)

    Manoel Ângelo Gomes Palácio

    2013-12-01

    Full Text Available FUNDAMENTO: Na ressuscitação cardiopulmonar (RCP prolongada, o efeito dos vasoconstritores não foi plenamente esclarecido. OBJETIVOS: Avaliar o efeito pressórico da adrenalina e da vasopressina, e observar o retorno da circulação espontânea (RCE. MÉTODOS: Estudo prospectivo, randomizado, cego e placebo-controlado. Após sete minutos em fibrilação ventricular, porcos receberam ciclos de dois minutos de RCP. Tentou-se a desfibrilação (4 J/kg uma vez aos 9 minutos e após cada ciclo, conforme o ritmo verificado, reiniciando-se a RCP imediatamente. Aos 9 minutos e depois de cada cinco minutos, aplicou-se adrenalina 0,02 mg/kg (n = 12 porcos, ou vasopressina 0,4 U/kg (n = 12, ou solução salina 0,9% 0,2 mL/kg (n = 8. A RCP continuou por 30 minutos ou até o RCE. RESULTADOS: A pressão de perfusão coronária aumentou para aproximadamente 20 mmHg nos três grupos. Com os vasoconstritores, a pressão alcançou 35 mmHg versus 15 mmHg com placebo (p < 0,001. Com vasopressina, manteve-se efeito de 15-20 mmHg após três doses versus zero com adrenalina ou placebo. Observou-se o RCE com frequência diferente (p = 0,031 entre adrenalina (10/12, vasopressina (6/12 e placebo (2/8. O tempo médio até o RCE não diferiu (16 minutos, nem o número de doses recebidas até então (uma ou duas. Entre os vasoconstritores não houve diferença significante, mas, frente ao placebo, apenas a adrenalina aumentou significantemente o RCE (p = 0,019. CONCLUSÃO: O efeito pressórico inicial dos vasoconstritores foi equivalente, e a vasopressina manteve um efeito tardio na ressuscitação prolongada. Apesar disso, comparando-se ao placebo, apenas a adrenalina aumentou significantemente a frequência do retorno da circulação espontânea.

  13. Quem são as mulheres que amamentam por 2 anos ou mais?

    Directory of Open Access Journals (Sweden)

    Elisa Justo Martins

    2012-02-01

    Full Text Available OBJETIVO: Identificar fatores associados à manutenção do aleitamento materno por 2 anos ou mais. MÉTODOS: Estudo de coorte que acompanhou 151 crianças selecionadas no Hospital de Clínicas de Porto Alegre, do nascimento até a idade de 3 a 5 anos. As mães foram entrevistadas pessoalmente na maternidade, aos 7 e 30 dias após o parto, e quando as crianças tinham entre 3 e 5 anos. As entrevistas aos 60, 120 e 180 dias de vida da criança foram feitas por contato telefônico, sempre que possível. Para testar as associações entre o desfecho (aleitamento materno por 2 anos ou mais e as variáveis explicativas, utilizou-se regressão de Poisson seguindo modelo hierárquico. RESULTADOS: Mostraram-se associados de forma positiva, com o desfecho: permanência da mãe em casa com a criança nos primeiros 6 meses de vida [risco relativo (RR = 2,13; intervalo de confiança de 95% (IC95% 1,12-4,05]; não uso de chupeta (RR = 2,45; IC95% 1,58-3,81; e introdução mais tardia de água e/ou chás e de outros leites na alimentação da criança. Para cada dia a mais sem a introdução desses líquidos, aumentava a probabilidade de a criança ser amamentada por 2 anos ou mais em 0,5% e 0,1%, respectivamente. Coabitação com o pai da criança mostrou associação negativa com o desfecho (RR = 0,61; IC95% 0,37-0,99. CONCLUSÃO: Mãe permanecer em casa com a criança nos primeiros 6 meses de vida, não coabitar com companheiro, não oferecer chupeta e postergar a introdução de água e/ou chás e outros leites na alimentação das crianças são características e comportamentos associados com a manutenção da amamentação por 2 anos ou mais.

  14. Spatial and temporal variation of the water quality of an intermittent river - Oued Fez (Morrocco)

    Science.gov (United States)

    Perrin, Jean-Louis; Bellarbi, Meriem; Lombard-Latune, Rémi; Rais, Naoual; Chahinian, Nanée.; Ijjaali, Mustafa

    2010-05-01

    In the South of the Mediterranean basin, many rivers are characterized by an alternation of very long dry periods only cut by short flood events. Currently, the socio-economical development of these zones is limited by the water scarcity but also by the poor quality of the water resources. In fact, human activities, generally concentrated in overpopulated cities, generate large quantity of domestic and industrial effluents which are directly rejected in the environment without any treatment. In Morocco, the well known city of Fez illustrates perfectly this situation observed in all the Maghreb countries. During the dry period, the Oued Fez which crosses the city, is only fed by non-treated anthropogenic inputs. Accumulation of pollutants is observed in the river bed sediments. Domestic and industrial effluents (200 000 m3/day) pollute all the down stream water bodies some of which are used for irrigation and other for fresh water supply. During floods, mainly generated by urban runoff, river bed sediments could be remobilized and a significant flush effect could occur. This study aims at characterising and quantifying the pollutant concentrations and fluxes in various points of the Oued Fez hydrological network and assessing its impact on the Sebou River; water resources of this river being considered as national priority in Morocco. Due to the peculiar Mediterranean hydrological regime, specific observation networks are set up to assess the temporal and spatial variability of pollutant fluxes in the river and to rank water and pollutant sources. The sampling sites on the Fez and Sebou oueds are selected based these criteria. A reference station is chosen upstream of the Oued Fez less than 300 metres from the direct anthropic inputs. Water quality is evaluated through nutrients (Total nitrogen, and total phosphorus essentially), heavy metals (essentially chromium) and suspended solids. The results of 4 sampling campaigns indicate that: in terms of nitrogen

  15. Micro-usinage nanoseconde UV ou femtoseconde: état de l'art et comparaison

    Science.gov (United States)

    Lopez, J.; Salin, F.; Hernandez, M.-C.; Faucon, M.

    2003-06-01

    Jusqu'ici les applications liées au micro-usinage étaient principalement réservées aux sources de types Nd :YAG, pour les matériaux métalliques, ou Excimère, pour les polymères. Les avancées récentes dans le domaine des lasers à impulsions ultra-brèves (usinage. Ces applications tirent profit de la possibilité d'usiner tout type matériau sans diffusion de chaleur hors du volume irradié. Après avoir rappeler les spécificités des interactions avec ces différents types de laser, nous présenterons quelques exemples de réalisations par rayonnement laser UV ou fenitoseconde.

  16. VÍRUS SER VIVO OU NÃO? EIS A QUESTÃO

    Directory of Open Access Journals (Sweden)

    Dionatas Ulises de Oliveira Meneguetti

    2014-06-01

    Full Text Available Se correlacionarmos a descoberta dos ácidos nucleicos e alguns pontos da teoria de Charles Darwin, podemos descrever uma nova definição para ser vivo onde “todos os seres vivos apresentam DNA e/ou RNA e tem a capacidade de evoluir”, com base nessa teoria os vírus são definidos como seres vivos, pois apresentam DNA ou RNA e tem uma alta capacidade de adaptação e evolução, um exemplo recente ocorreu com o vírus H1N1. DESCRITORES: Vírus, Ácidos nucleicos e Evolução Biológica.

  17. Quand est née la criminologie ? ou la criminologie avant les Archives...

    Directory of Open Access Journals (Sweden)

    Martine Kaluszynski

    2005-01-01

    Full Text Available L’émergence de l’homme criminelComment le crime, acte banal ou barbare, intégré aux sociétés et sanctionné par elles, est-il sorti du giron juridique et devenu un objet ou plutôt un “sujet” scientifique ? L’émergence de “l’homme criminel” a contribué de façon déterminante à l’élaboration d’un savoir scientifique sur le crime. Depuis longtemps, des savoirs diffus, des instruments, des pensées convergent pour s’attacher à établir l’aspect scientifique du phénomène. Selon les lieux d’observation...

  18. Complete three photon Hong-Ou-Mandel interference at a three port device.

    Science.gov (United States)

    Mährlein, Simon; von Zanthier, Joachim; Agarwal, Girish S

    2015-06-15

    We report the possibility of completely destructive interference of three indistinguishable photons on a three port device providing a generalisation of the well known Hong-Ou-Mandel interference of two indistinguishable photons on a two port device. Our analysis is based on the underlying mathematical framework of SU(3) transformations rather than SU(2) transformations. We show the completely destructive three photon interference for a large range of parameters of the three port device and point out the physical origin of such interference in terms of the contributions from different quantum paths. As each output port can deliver zero to three photons the device generates higher dimensional entanglement. In particular, different forms of entangled states of qudits can be generated depending on the device parameters. Our system is different from a symmetric three port beam splitter which does not exhibit a three photon Hong-Ou-Mandel interference.

  19. Hong-Ou-Mandel Interference between Two Deterministic Collective Excitations in an Atomic Ensemble

    Science.gov (United States)

    Li, Jun; Zhou, Ming-Ti; Jing, Bo; Wang, Xu-Jie; Yang, Sheng-Jun; Jiang, Xiao; Mølmer, Klaus; Bao, Xiao-Hui; Pan, Jian-Wei

    2016-10-01

    We demonstrate deterministic generation of two distinct collective excitations in one atomic ensemble, and we realize the Hong-Ou-Mandel interference between them. Using Rydberg blockade we create single collective excitations in two different Zeeman levels, and we use stimulated Raman transitions to perform a beam-splitter operation between the excited atomic modes. By converting the atomic excitations into photons, the two-excitation interference is measured by photon coincidence detection with a visibility of 0.89(6). The Hong-Ou-Mandel interference witnesses an entangled NOON state of the collective atomic excitations, and we demonstrate its two times enhanced sensitivity to a magnetic field compared with a single excitation. Our work implements a minimal instance of boson sampling and paves the way for further multimode and multiexcitation studies with collective excitations of atomic ensembles.

  20. High visibility Hong-Ou-Mandel interference via a time-resolved coincidence measurement

    Science.gov (United States)

    Tsujimoto, Yoshiaki; Sugiura, Yukihiro; Tanaka, Motoki; Ikuta, Rikizo; Miki, Shigehito; Yamashita, Taro; Terai, Hirotaka; Fujiwara, Mikio; Yamamoto, Takashi; Koashi, Masato; Sasaki, Masahide; Imoto, Nobuyuki

    2017-05-01

    We report on the observation of a high visibility Hong-Ou-Mandel interference of two heralded photons emitted from a spontaneous parametric down conversion~(SPDC) pumped by continuous-wave~(cw) light. A non-degenerate photon pair at 1541~nm and 1580~nm is generated by cw-pumped SPDC through a periodically poled lithium niobate waveguide. The heralded single photon at 1541~nm is prepared by the detection of the photon at 1580~nm. We performed the experiment of the Hong-Ou-Mandel interference between heralded single photons in separated time bins and observed a high visibility interference. All detectors we used are superconducting nanowire single-photon detectors and an overall temporal resolution of the photon detection is estimated as 85 ps, which is sufficiently shorter than the coherence time of the heralded photons.

  1. Des jeans chinois dans les rues du Caire, ou les espaces discrets de la mondialisation

    Directory of Open Access Journals (Sweden)

    Olivier Pliez

    2007-12-01

    Full Text Available Nous proposons de mettre en lumière une route commerciale transnationale entre la Chine et l’Égypte via la Libye en montrant comment des localités, quartiers, ports ou marchés sont liés dans un tout par la circulation des personnes et des marchandises. Le long de cette «route globale», les logiques locales de commerçants, migrants ou passeurs s’entremêlent pour produire des espaces ressources. La «mondialisation par le bas» ouvre ainsi aux géographes un champ de réflexion et d’expérimentation sur les méthodes permettant d’appréhender la construction d’espaces transnationaux et discontinus.

  2. Chacal ou Cordeiro? O Brasil frente aos desafios e oportunidades do Sistema Internacional

    Directory of Open Access Journals (Sweden)

    Júlio César Cossio Rodriguez

    2012-12-01

    Full Text Available Este artigo analisa as configurações da política externa brasileira pós-2002 para relacionar os ganhos e perdas com as mudanças estruturais do sistema internacional. O intuito e realizar um balanço das capacidades materiais do Brasil, assim como dos seus desafios e oportunidades, a partir das categorias propostas por Randall Schweller. Chacal ou Cordeiro? Como se comporta o Brasil num sistema internacional em transição e quais podem ser as consequências? Ou seja, atua como chacal na busca de ganhos relativos ao seguir o ator mais revisionista (China, e como cordeiro na associação direta com a potência unipolar.

  3. Problem un ou deux phonèmes? w języku polskim

    Directory of Open Access Journals (Sweden)

    Marcin Wągiel

    2016-12-01

    Full Text Available The un ou deux phonèmes? problem in Polish The paper deals with the so-called un ou deux phonèmes? problem in Modern Polish. The framework adopted by the author is the theory and methodology of Axiomatic Functionalism, i.e., a functional semiotic approach developed by Jan W. F. Mulder in association with Sándor G. J. Hervey which is mainly based on linguistic ideas of André Martinet. The analysis focuses on the phonological interpretation of sequences of palatalized labials and [j], nasal diphthongs, and affricates in Polish. The author argues that nasal diphthongs and palatal and retroflex affricates should be interpreted monophonematically, whereas it is both adequate and economical to interpret sequences of palatalized labials and [j] and alveolar affricates as realizations of sequences of two separate phonemes.   Problem un ou deux phonèmes? w języku polskim Niniejszy artykuł poświęcony jest tzw. problemowi un ou deux phonèmes? we współczesnej polszczyźnie. Aparatem pojęciowym wykorzystanym przez autora jest teoria i metodologia funkcjonalizmu aksjomatycznego, tj. funkcjonalnego opisu semiotycznego opracowanego przez Jana W. F. Muldera we współpracy z Sándorem G. J. Herveyem, który bazuje na koncepcjach lingwistycznych André Martineta. Analiza skupia się na interpretacji fonologicznej sekwencji spalatalizowanych spółgłosek labialnych oraz [j], dyftongów nazalnych, a także afrykat w języku polskim. Autor argumentuje, że dyftongi nazalne oraz afrykaty palatalne i retrofleksyjne powinny być interpretowane monofonemicznie, natomiast interpretacja sekwencji spalatalizowanych spółgłosek labialnych i [j] oraz afrykat alweolarnych jako realizacji sekwencji dwóch niezależnych fonemów jest zarówno adekwatna, jak i ekonomiczna.

  4. Celulares pagos por empregadores: “benefício” ou “malefício”?

    Directory of Open Access Journals (Sweden)

    Lúcia Cipriano

    Full Text Available Ao longo do século XX, os espaços e horários destinados ao trabalho eram isolados daqueles destinados à vida pessoal, familiar ou ao lazer. Na contemporaneidade, no entanto, tornou-se comum atender telefonemas de trabalho nos mais variados locais fora do horário de expediente e até mesmo nas férias. Uma das razões para esse novo tipo de comportamento é a concessão, pelos empregadores, de celulares com contas pagas aos seus funcionários. A presente pesquisa procurou investigar quais são as reações desses funcionários. Para tanto, foram conduzidas entrevistas de perguntas abertas com ocupantes de cargos de níveis gerenciais em empresas particulares do Estado do Rio de Janeiro. Foi possível constatar uma ambivalência generalizada entre os entrevistados. Por um lado, eles consideram tal prática um “benefício”, porque também podem usar o celular da empresa para assuntos pessoais, o que representa uma boa economia. Por outro lado, no entanto, se ressentem da invasão, não remunerada ou previamente acordada, de seu tempo livre. Alguns chegam mesmo a se referir a essa concessão como um “malefício”, ou, ainda mais radicalmente, como uma nova forma de escravidão.

  5. Gas physical conditions and kinematics of the giant outflow Ou4

    CERN Document Server

    Corradi, Romano L M; Acker, Agnès; Greimel, Robert; Guillout, Patrick

    2014-01-01

    Ou4 is a recently discovered bipolar outflow with a projected size of more than one degree in the plane of the sky. It is apparently centred on the young stellar cluster -whose most massive representative is the triple system HR8119- inside the HII region Sh 2-129. The driving source, the nature, and the distance of Ou4 are not known. Deep narrow-band imagery of the whole nebula at arcsec resolution was obtained to study its morphology. Long-slit spectroscopy of the tips of the bipolar lobes was secured to determine the gas ionization mechanism, physical conditions, and line-of-sight velocities. An estimate of the proper motions at the tip of the south lobe using archival images is attempted. The existing multi-wavelength data for Sh 2-129 and HR 8119 are also comprehensively reviewed. The morphology of Ou4, its emission-line spatial distribution, line flux ratios, and the kinematic modelling adopting a bow-shock parabolic geometry, illustrate the expansion of a shock-excited fast collimated outflow. The radi...

  6. Celulares pagos por empregadores: “benefício” ou “malefício”?

    Directory of Open Access Journals (Sweden)

    Lúcia Cipriano

    Full Text Available Ao longo do século XX, os espaços e horários destinados ao trabalho eram isolados daqueles destinados à vida pessoal, familiar ou ao lazer. Na contemporaneidade, no entanto, tornou-se comum atender telefonemas de trabalho nos mais variados locais fora do horário de expediente e até mesmo nas férias. Uma das razões para esse novo tipo de comportamento é a concessão, pelos empregadores, de celulares com contas pagas aos seus funcionários. A presente pesquisa procurou investigar quais são as reações desses funcionários. Para tanto, foram conduzidas entrevistas de perguntas abertas com ocupantes de cargos de níveis gerenciais em empresas particulares do Estado do Rio de Janeiro. Foi possível constatar uma ambivalência generalizada entre os entrevistados. Por um lado, eles consideram tal prática um “benefício”, porque também podem usar o celular da empresa para assuntos pessoais, o que representa uma boa economia. Por outro lado, no entanto, se ressentem da invasão, não remunerada ou previamente acordada, de seu tempo livre. Alguns chegam mesmo a se referir a essa concessão como um “malefício”, ou, ainda mais radicalmente, como uma nova forma de escravidão.

  7. ION VATAMANU

    Directory of Open Access Journals (Sweden)

    l. Povar

    2012-12-01

    Full Text Available Ion Vatamanu was a chemist, writer and public figure. He was equally passionate about both his chosen fields of activity: chemistry and poetry. Chemistry, with its perfect equilibrium of logic and precision, provided inspiration for lyrical creativity, whereas poetry writing enlivened his imagination and passion for chemistry. He loved his parents. He adored his wife Elena, whom he often gifted a sea of flowers. He loved his daughters Mihaela, Mariana, and Leontina. He loved life, and he loved people.

  8. Electron Beam Ion Sources

    OpenAIRE

    Zschornacka, G.; Schmidt, M.; Thorn, A.

    2014-01-01

    Electron beam ion sources (EBISs) are ion sources that work based on the principle of electron impact ionization, allowing the production of very highly charged ions. The ions produced can be extracted as a DC ion beam as well as ion pulses of different time structures. In comparison to most of the other known ion sources, EBISs feature ion beams with very good beam emittances and a low energy spread. Furthermore, EBISs are excellent sources of photons (X-rays, ultraviolet, extreme ultraviole...

  9. Ion Beam Extraction by Discrete Ion Focusing

    DEFF Research Database (Denmark)

    2010-01-01

    An apparatus (900) and methods are disclosed for ion beam extraction. In an implementation, the apparatus includes a plasma source (or plasma) (802) and an ion extractor (804). The plasma source is adapted to generate ions and the ion extractor is immersed in the plasma source to extract a fraction...... of the generated ions. The ion extractor is surrounded by a space charge (810) formed at least in part by the extracted ions. The ion extractor includes a biased electrode (806) forming an interface with an insulator (808). The interface is customized to form a strongly curved potential distribution (812......) in the space-charge surrounding the ion extractor. The strongly curved potential distribution focuses the extracted ions towards an opening (814) on a surface of the biased electrode thereby resulting in an ion beam....

  10. Caracterisation des proprietes acoustiques des materiaux poreux a cellules ouvertes et a matrice rigide ou souple

    Science.gov (United States)

    Salissou, Yacoubou

    L'objectif global vise par les travaux de cette these est d'ameliorer la caracterisation des proprietes macroscopiques des materiaux poreux a structure rigide ou souple par des approches inverses et indirectes basees sur des mesures acoustiques faites en tube d'impedance. La precision des approches inverses et indirectes utilisees aujourd'hui est principalement limitee par la qualite des mesures acoustiques obtenues en tube d'impedance. En consequence, cette these se penche sur quatre problemes qui aideront a l'atteinte de l'objectif global precite. Le premier probleme porte sur une caracterisation precise de la porosite ouverte des materiaux poreux. Cette propriete en est une de passage permettant de lier la mesure des proprietes dynamiques acoustiques d'un materiau poreux aux proprietes effectives de sa phase fluide decrite par les modeles semi-phenomenologiques. Le deuxieme probleme traite de l'hypothese de symetrie des materiaux poreux selon leur epaisseur ou un index et un critere sont proposes pour quantifier l'asymetrie d'un materiau. Cette hypothese est souvent source d'imprecision des methodes de caracterisation inverses et indirectes en tube d'impedance. Le critere d'asymetrie propose permet ainsi de s'assurer de l'applicabilite et de la precision de ces methodes pour un materiau donne. Le troisieme probleme vise a mieux comprendre le probleme de transmission sonore en tube d'impedance en presentant pour la premiere fois un developpement exact du probleme par decomposition d'ondes. Ce developpement permet d'etablir clairement les limites des nombreuses methodes existantes basees sur des tubes de transmission a 2, 3 ou 4 microphones. La meilleure comprehension de ce probleme de transmission est importante puisque c'est par ce type de mesures que des methodes permettent d'extraire successivement la matrice de transfert d'un materiau poreux et ses proprietes dynamiques intrinseques comme son impedance caracteristique et son nombre d'onde complexe. Enfin, le

  11. Instrumentation: Ion Chromatography.

    Science.gov (United States)

    Fritz, James S.

    1987-01-01

    Discusses the importance of ion chromatography in separating and measuring anions. The principles of ion exchange are presented, along with some applications of ion chromatography in industry. Ion chromatography systems are described, as well as ion pair and ion exclusion chromatography, column packings, detectors, and programming. (TW)

  12. ION GUN

    Science.gov (United States)

    Dandl, R.A.

    1961-10-24

    An ion gun is described for the production of an electrically neutral ionized plasma. The ion gun comprises an anode and a cathode mounted in concentric relationship with a narrow annulus between. The facing surfaces of the rear portions of the anode and cathode are recessed to form an annular manifold. Positioned within this manifold is an annular intermediate electrode aligned with the an nulus between the anode and cathode. Gas is fed to the manifold and an arc discharge is established between the anode and cathode. The gas is then withdrawn from the manifold through the annulus between the anode and cathode by a pressure differential. The gas is then ionized by the arc discharge across the annulus. The ionized gas is withdrawn from the annulus by the combined effects of the pressure differential and a collimating magnetic field. In a 3000 gauss magnetic field, an arc voltage of 1800 volts, and an arc current of 0.2 amp, a plasma of about 3 x 10/sup 11/ particles/cc is obtained. (AEC)

  13. Either this ou aquilo: traduzindo a poesia infantil de Cecília Meireles para o inglês

    OpenAIRE

    Abud, Telma Franco Diniz

    2012-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em Estudos da Tradução O objetivo do presente trabalho é discutir as propostas de tradução para o inglês, de uma seleta de poemas do clássico infantil Ou isto ou aquilo, de Cecília Meireles, a saber, “O cavalinho branco”; “A égua e a água”; “Enchente”; “Passarinho no sapé”; “Ou isto ou aquilo”; e “A lua é do Raul”. Para tanto, esboça um perfil da poeta Cecília Meire...

  14. Biofilme em marca-passo artificial: ficção ou realidade?

    Directory of Open Access Journals (Sweden)

    Ana Paula Azevedo Santos

    2011-11-01

    Full Text Available A estimulação cardíaca artificial por meio de marca-passo cardíaco representa uma das alternativas mais promissoras no tratamento das arritmias, entretanto pode ocasionar reações singulares ou complexas, precoces ou tardias. Neste estudo, objetivou-se descrever as evidências científicas sobre o risco de infecção e formação de biofilme associado ao marca-passo cardíaco. Trata-se de um estudo de revisão integrativa da literatura. Totalizaram-se 14 publicações classificadas em três categorias temáticas: diagnóstico (microbiológico e/ou clínico, complicações e terapêutica das infecções. Os Staphylococcus epidermidis e os Staphylococcus aureus foram os microrganismos mais frequentemente isolados. Não foi possível determinar a incidência da infecção associada aos marca-passos, uma vez que os estudos eram em geral de prevalência. Em termos de terapêutica destacou-se a remoção completa dos marca-passos, especialmente nos casos de suspeita de biofilme. Ainda é controverso o uso da profilaxia antibiótica sistêmica na redução da incidência da infecção associada ao implante de marca-passo

  15. IMAGENS NO CALOR DA HORA OU A FÊNIX RENASCIDA DA IMAGEM DOCUMENTAL

    Directory of Open Access Journals (Sweden)

    Kati Caetano

    2008-12-01

    Full Text Available Apesar da freqüente discussão, tanto nos meios acadêmicos quanto nos midiáticos, envolvendo a crise da imagem documental, na esteira da propalada crise da cultura documental como um todo, não há como negar a proliferação de imagens e o incremento de uma produção assumida com esse propósito no universo das relações comunicacionais, seja ele impresso ou digital. Se, no domínio da arte, a ação hegemônica contemporânea consiste na desestabilização figurativa das imagens, do lado das mídias de produção massiva, afirma-se a sua estabilização como condiçãofundante do ato de documentar. Este trabalho não visa abordar as várias concepções de documental, porque parte do pressuposto de que esse aspecto se apresenta como resultado de estratégias figurativo-enunciativas de “fazer crer”, responsáveis por múltiplos regimes de sentido. De suas escolhas e agenciamentos decorrem modalidades interacionais amparadas na mediatez ou imediatez dos processos compreensivos, num sistema de valores condicionantes do ato comunicativo que coloca em evidência as funções prática, cognitiva, afetiva ou fiduciária (calcada em regimes de crençadas mediações simbólicas. A questão mais geral que norteia opresente texto é indagar como as diferentes mídias, do fotográfico ao virtual, operam com essas imagens e que tipos de implicações comunicacionais promovem.

  16. Modelos DEA com variáveis limitadas ou soma constante

    Directory of Open Access Journals (Sweden)

    José Virgílio Guedes de Avellar

    2005-04-01

    Full Text Available Neste trabalho são propostos dois modelos tipo DEA (Data Envelopment Analysis em que um novo input (ou um novo output deve ser distribuído de maneira justa para todas as unidades (DMUs - Decision Making Units de uma corporação. Uma característica interessante dos modelos propostos é que a forma dessa distribuição é influenciada pelos valores dos inputs já empregados e dos outputs já gerados em cada DMU. Os modelos foram construídos de acordo com o perfil geométrico da fronteira CCR, podendo ter forma côncava ou convexa conforme a natureza da variável que se quer distribuir. Mostramos que, sob essa hipótese de um formato geométrico específico para a fronteira, torna-se simples a distribuição do novo input (ou output entre as várias DMUs, pois cada uma delas receberá a fração do novo input (ou output que a torne eficiente, forçando sua posição sobre a fronteira pré-determinada.In this work we present two DEA (Data Envelopment Analysis models in which a new input (or output is to be fairly assigned to all units (DMUs - Decision Making Units of a corporation. An interesting characteristic of those proposed models is that the way this distribution is influenced by both inputs and outputs used in each DMU. The models were built in accordance with the geometric shape of CCR frontier and they can be convex or concave, depending on the nature of the variables we intend to share. We show that, under this assumption, it becomes relatively easy the distribution of a new input (or output among several DMU's, considering that each DMU will receive the new input (or output fraction in order to become efficient, forcing its position on the specific frontier.

  17. COZINHEIRO IMPERIAL - Ou a nova arte do cozimento e do copeiro em todos os seus ramos

    Directory of Open Access Journals (Sweden)

    Daniela Pereira de Vargas

    2011-12-01

    Full Text Available Resumo: O Cozinheiro Imperial Ou Nova Arte Do Cozinheiro E Do Copeiro Em Todos Os Seus Ramos é uma referencia tanto na culinária como na bibliografia brasileira, por tratar-se do primeiro livro de receitas editado no Brasil. De autor anônimo, foi reeditado em 1996 pela Best Seller. A Universidade de São Paulo digitalizou os originais, que hoje são parte de sua Coleção Brasiliana. Pela importância cultural do material, ele é destacado nesta edição de RRV. Palavras chave: Gastronomia. Cultura Brasileira. Cozinheiro Imperial. 

  18. Christian Bobin: visages de l’enfance ou de la résistance au sommeil

    OpenAIRE

    Sasseville, Michel; Université Laval

    2009-01-01

    Christian Bobin: visages de l’enfance ou de la résistance au sommeil Resumé: Christian Bobin, écrivain français, parle de tout dans ses livres. Mais il accorde une attention particulière à l’amour et à l’enfance. Cet article présente quelques extraits portant sur l’enfance. Il nous a fallu faire des choix, tant le sujet est traité amplement dans presque tous ses livres. Christian Bobin: Faces of childhood or of the resistance in rest Abstract: Christian Bobin, a French wri...

  19. Père ou pair? Décalages et ajustements co-énonciatifs

    Directory of Open Access Journals (Sweden)

    Christiane Préneron

    2010-12-01

    Full Text Available

    L’objet de notre analyse dialogique et co-énonciative concerne la forme prise par la relation entre un père et son fi ls au cours d’échanges verbaux. Dans cette dimension relationnelle, nous avons cherché plus particulièrement à éclairer le statut d’énonciateur que chacun octroie à lui-même et à l’autre. Les images qu’un père et un fi ls ont l’un de l’autre et les places qu’ils occupent dans le dialogue sont en partie déterminées par leur statut de père et d’enfant. Ces places ne confi gurent pas un mode relationnel homogène. Au contraire, cet extrait de corpus est frappant par la grande diversité d’attitudes adoptées par le père avec son enfant: tour à tour il lui donne des ordres, des permissions, le réconforte, joue avec lui, lui propose des défi s ou rivalise avec lui. Daniel peut entrer dans le jeu proposé par son père ou s’y opposer, se laisser guider ou refuser, mais aussi être à l’initiative par des demandes ou des jeux. C’est cette diversité que nous tentons de mettre au jour, sachant que certaines séquences se caractérisent plus particulièrement par des décalages entre les interlocuteurs, alors que d’autres conduisent à des ajustements. Si la diversité qui caractérise cet extrait ne saurait être étendue comme caractérisant toute interaction père/enfant, l’analyse qui en est faite peut servir de repère pour l’étude de nouvelles interactions parent/enfant.

  20. Multiplicative Stochastic Resonance for a Linear System Driven by O-U Noise

    Institute of Scientific and Technical Information of China (English)

    LI Jing-Hui

    2009-01-01

    In the paper, we study a linear system driven by O-U noise and give a method which is different from the one stated in Europhys. Lett. 40 (1997) 117. We find the same phenomenon of multiplicative stochastic resonance for the response of the system to the signal as the one found in Europhys. Lett. 40 (1997) 117. The merit of our method is that it prevents the complex formulas when making sum from n = 0 to n →∞ as in Europhys. Lett. 40 (1997) 117, which leads to the approximate results of the figures.

  1. Alcoolismo: acusação ou diagnóstico?

    Directory of Open Access Journals (Sweden)

    Neves Delma Pessanha

    2004-01-01

    Full Text Available O artigo apresenta reflexões orientadoras da construção do consumo de bebidas alcoólicas como objeto sociológico, inclusive das formas proscritas articuladas à definição de patologias ou ao desrespeito a regras morais. Mediante considerações sobre o investimento acumulado por processo de pesquisa em curso, a autora destaca os dilemas éticos e epistemológicos enfrentados por antropólogos que se dedicam ao tema.

  2. Alcoolismo: acusação ou diagnóstico?

    Directory of Open Access Journals (Sweden)

    Delma Pessanha Neves

    2004-02-01

    Full Text Available O artigo apresenta reflexões orientadoras da construção do consumo de bebidas alcoólicas como objeto sociológico, inclusive das formas proscritas articuladas à definição de patologias ou ao desrespeito a regras morais. Mediante considerações sobre o investimento acumulado por processo de pesquisa em curso, a autora destaca os dilemas éticos e epistemológicos enfrentados por antropólogos que se dedicam ao tema.

  3. Teologiese tipologie: 'n Homiletiese sleutel vir die prediking van die Ou Testament

    Directory of Open Access Journals (Sweden)

    J. J. van der Walt

    1989-06-01

    Full Text Available Daar is ’n baie ‘maklike’ en daarom verleidelike manier om uit die Ou Testament te preek deur ’n mens, van wie geskrywe word, tot ’n tipe of voorbeeld aan die gemeente voor te hou. Op hierdie manier word die sentrale boodskap van so ’n preek: ‘word ’n Rut’ ; ‘wees nie ’n Esau nie’. Op dieselfde wyse sou ook oor Calvyn, Vader Kestell of Lenin gepreek kan word: Daarom is dit duidelik dat prediking oor menslike tipes nie Bybelse prediking is nie, al kom die mense in die Bybel voor.

  4. Altmetria ou métricas alternativas: conceitos e principais características

    OpenAIRE

    Iara Vidal Pereira de Souza

    2016-01-01

    Apresentam-se os conceitos e características das métricas alternativas (ou altmetria, em português), com especial destaque para a relação destas com as métricas tradicionais e potenciais riscos de manipulação de dados. Discutem-se os desafios para tais métricas e as ferramentas disponíveis para tal contagem. This interview presents the concepts and characteristics of the alternative metrics (or altmetria, in portuguese), emphasising their relationship to the traditional metrics and the pot...

  5. Fungal microflora biodiversity as a function of pollution in Oued Sebou (Morocco).

    Science.gov (United States)

    Sage, L; Bennasser, L; Steiman, R; Seigle-Murandi, F

    1997-08-01

    An inventory of the fungal microflora present in sediments collected at 11 sites along Oued Sebou has been established. The influence of some climatic parameters (temperature, rainfall) and of pollution on the composition of the fungal communities has been questioned. Emericella nidulans, Eurotium amstelodami, Neosartotya fisheri var. glabrum (Ascomycetes), Dreschslera biseptata (Dematiaceae), Penicillium citrinum (Mucedinaceae) and Phoma sp. (Sphaeropsidale) can be considered as strains sensitive to pollution. Penicillium janthelinum, Trichoderma koningii (Mucedinaceae) and Candida albicans (Yeast) were found only at the most polluted sites; Talaromyces flavus (Ascomycete) Rhodotorula rubra, Saccharomyces cerevisiae (Yeasts) and Fusarium oxysporum (Tuberculariales) were more often found at heavily polluted sites than at lightly polluted ones.

  6. Assexuados, libidinosos ou um paradoxo sexual? Gênero e sexualidade em pessoas com deficiência intelectual

    OpenAIRE

    2014-01-01

    Deficiente ou não o corpo carrega marcas sociais e culturais apreendidas em processos de interação. Vista por este ângulo, o empreendimento investigativo por mim realizado se divide em três eixos analíticos. No primeiro eixo busco reconstituir a disputa conceitual sobre os termos "deficiência" e "deficiência intelectual". A proposta é pensar os deslizamentos semânticos do conceito e as implicações políticas dessas transformações. No segundo eixo procuro analisar os discursos dos professores, ...

  7. Tolerance and biomarkers as useful tools for assessing environmental quality in the Oued Souss estuary (Bay of Agadir, Morocco).

    Science.gov (United States)

    Ait Alla, A; Mouneyrac, C; Durou, C; Moukrim, A; Pellerin, J

    2006-05-01

    The aim of this study was to assess aquatic environmental quality of Oued Souss (Agadir, Morocco). This estuary has been subjected for a long time to large amounts of sewage discharges and industrial effluents. Since November 2002, no waste outlets have been discharged in this site due to their connection to a wastewater purification plant. Firstly, we have compared metal tolerance of the annelid polychaete (Nereis diversicolor) originating from Oued Souss and a relatively clean site (Oualidia, Morocco). Secondly, we have evaluated with a multi-marker approach (acetylcholinesterase [AChE], glutathione-S-transferases [GSTs], catalase, thiobarbituric acid reactive substances [TBARs]) responses of worms to the pollution gradient. Results have shown that worms from Oued Souss have acquired tolerance to copper and zinc due to a long-term sub-lethal metal exposure and this metal tolerance was maintained in spite of the end of wastewater discharges in this site. Higher catalase, GSTs and TBARs values have been observed in worms from Oued Souss sampled before implantation of wastewater treatment. The multi-marker approach confirms that these worms have been submitted to various contaminants. In contrast, high inhibition in AChE activities measured in worms from Oued Souss could be explained by the continuous agricultural influence of nearest areas. The level of contamination was probably maintained since biomarker values were generally higher in worms from Oued Souss when compared to Oualidia.

  8. Orientador ou tutor é autor? Orientador, tutor o director de tesis, ¿es autor?

    Directory of Open Access Journals (Sweden)

    Maria das Graças Targino

    2010-12-01

    Full Text Available Ao decorrer dos tempos, as profundas mudanças no ensino e na pesquisa advindas do avanço tecnológico e, sobretudo, a valoração crescente do ensino superior e da investigação científica vêm acarretando intensa controvérsia em torno do velho e desgastado slogan publish or perish. Cada vez mais, orientadores ou tutores de teses e trabalhos acadêmicos em geral aparecem como primeiro autor ou co-autor de trabalhos realizados por seus alunos, recorrendo ao argumento de que a autoria, como atividade e processo, sofre intensas mutações sociais, culturais, econômicas e políticas. Este é um tema que suscita debate e conduz a mudanças conceituais que exigem a reconstrução dos fundamentos teóricos que cercam a autoria, mas sem relegar a questão ética de respeito à produção do outro.

  9. Freud é monista, dualista ou pluralista? Is Freud a monist, a dualist or a pluralist?

    Directory of Open Access Journals (Sweden)

    Monah Winograd

    2004-12-01

    Full Text Available Este artigo trata de uma questão que surge sempre que a problemática do corpo na teoria freudiana é desdobrada. Seria Freud monista, dualista ou pluralista? Nosso primeiro esforço é definir estes termos do léxico filosófico, atentando para a sua generalidade. Em seguida, debruçamo-nos sobre a obra freudiana para mostrar que sua teoria não se encaixa nestas categorias, ou antes, ela aglomera os três termos já que trabalha simultaneamente com monismos, dualismos e pluralismos. Analisamos os conceitos de inconsciente, pulsão, equação etiológica e séries complementares para sustentar esta posição.This article deals with a question that always appears when we investigate the problem of the body in Freud's theory. Is Freud a monist, a dualist or a pluralist? Our first effort is to define these terms of the philosophical lexic, paying attention to its generality. Afterwards, we study the Freudian work in order to show that his theory does not fit into these categories. On the contrary, it puts together the three terms once it works at the same time with monisms, dualisms and pluralisms.

  10. Acne e dieta: verdade ou mito? Acne and diet: truth or myth?

    Directory of Open Access Journals (Sweden)

    Adilson Costa

    2010-06-01

    Full Text Available Nos últimos 50 anos, foram publicados inúmeros estudos com a finalidade de comprovar se a dieta está relacionada à etiologia da acne. Embora existam estudos antigos, que são bem difundidos entre os dermatologistas e negam a associação entre acne e dieta, seu delineamento científico é pobre. Recentemente, novos artigos demonstraram evidências contrárias às publicações anteriores. Sendo assim, os autores realizaram esta revisão bibliográfica com o intuito de averiguar se a dieta influencia direta ou indiretamente um ou mais dos quatro pilares etiopatogênicos fundamentais da acne: (1 hiperproliferação dos queratinócitos basais, (2 aumento da produção sebácea, (3 colonização pelo Propionibacterium acnes e (4 inflamação.Numerous studies were published over the last 50 years to investigate whether diet is associated with the etiology of acne. Although older studies well known by dermatologists that refute the association between acne and diet exist, their scientific foundation is weak. New articles have recently brought to light evidence contrary to previous findings. Therefore, we would like to investigate whether diet, directly or indirectly, influences one or more of the four fundamental etiopathogenic pillars of acne: (1 hyperproliferation of basal keratinocytes, (2 increase of sebaceous production, (3 colonization by Propionibacterium acnes, and (4 inflammation.

  11. Eficacia da limpeza ou desinfecao do meato urinario antes da cateterizacao urinaria: revisao sistematica

    Directory of Open Access Journals (Sweden)

    Madalena Cunha

    2013-12-01

    Full Text Available As infeções do trato urinário associadas à cateterização são muito frequentes no contexto comunitário e hospitalar. Existem atualmente várias recomendações para sua prevenção, contudo, quando abordado o soluto a utilizar no meato urinário previamente à algaliação continuam a persistir dúvidas. Assim, este estudo procurou determinar a eficácia da limpeza do meato urinário com água ou soro fisiológico comparativamente à sua assepsia por meio de uma revisão sistemática com metanálise. Para isso foram seguidos os princípios propostos pelo Cochrane Handbook , a análise crítica realizada por dois investigadores e a análise estatística com recurso ao programa STATA 11.1. Podemos concluir que a limpeza ou desinfeção do meato urinário previamente à cateterização vesical não é estatisticamente significativa (OR=1,07, IC 95%=0,68-1,68, p=0,779, existindo alguma evidência de que a utilização de água/soro fisiológico reduz as taxas de ITU.

  12. Plantio direto de alface americana sobre plantas de cobertura dessecadas ou roçadas

    Directory of Open Access Journals (Sweden)

    Andréia Cristina Silva Hirata

    2014-06-01

    Full Text Available O objetivo deste trabalho foi avaliar o plantio direto de alface americana no verão sobre plantas de cobertura dessecadas ou roçadas em cultivos sucessivos. O trabalho foi desenvolvido no município de Álvares Machado, São Paulo, Brasil. O delineamento experimental foi em blocos ao acaso, dispostos em parcelas subdivididas, com quatro repetições. O fator da parcela principal foram dois manejos das plantas de cobertura (dessecadas com herbicida ou roçadas e as subparcelas, seis espécies de plantas de cobertura (Cajanus cajan cv. IAPAR 43, Crotalaria spectabilis, Crotalaria juncea, Mucuna pruriens, Pennisetum glaucum e vegetação natural, além da testemunha sem plantas de cobertura. O manejo roçado apresentou desempenho inferior no primeiro cultivo da alface, todavia não diferiu do manejo químico no segundo cultivo. A cobertura do solo com mucuna apresentou maior produtividade da alface no primeiro cultivo devido ao excesso de palha das demais coberturas, o qual prejudicou o estabelecimento da alface. No segundo cultivo não houve diferenças entre as coberturas. A roçagem de plantas de cobertura é uma opção viável para plantio direto de alface sem herbicidas.

  13. Nonlinear optical effects and Hong-Ou-Mandel interference in cavity quantum electrodynamics

    Science.gov (United States)

    Mirza, Imran M.; van Enk, Steven J.

    Pure quantum interference among single photons is one of the key ingredients to perform linear optics quantum computation (LOQC). The Hong-Ou-Mandel interference (HOMI) [C. K. Hong, Z. Y. Ou and L. Mandel, Phys. Rev. Lett. 59, (18), 2044-2046 (1987)] i.e. complete destructive interference between two identical and indistinguishable photons simultaneously entering input ports of a 50/50 beam splitter, is a well-known example in this context. In this talk, I'll present our theoretical study of HOMI in a coupled Jaynes-Cummings array. In particular and by applying quantum jump/trajectory formalism, I'll focus on how partial quantum interference between two photons survive both non-linearities produced by two-level emitter and spectral filtering due to optical cavities in our coupled cavity array setup [Imran M. Mirza and Steven J. van Enk, Opt. Comm. 343, 172-177 (2015)]. Along with LOQC, this work is crucial from the perspective of exploiting coupled cavity arrays to store single photons reliably (without altering their temporal and spectral traits) [Imran M. Mirza, Steven J. van Enk and Jeff Kimble, JOSA B, 10, 2640-2649, (2013)].

  14. Water quality assessment of a highly polluted Mediterranean River - Oued Fez (Morocco)

    Science.gov (United States)

    Perrin, J.-L.; Bellarbi, M.; Raïs, N.; Chahinian, N.; Moulin, P.; Ijjaali, M.

    2012-04-01

    In the South of the Mediterranean basin, many rivers are characterized by an alternation of very long dry periods only cut by short flood events. Currently, the socio-economical development of these zones is limited by water scarcity and poor quality of the water resources. Indeed human activities, generally concentrated in overpopulated cities, generate large quantity of domestic and industrial effluents which are directly rejected in the environment without any treatment. In Morocco, the well known city of Fez illustrates perfectly this situation, observed in most developing countries. The oued Fez receives continuously the non-treated domestic and industrial effluents (90.000 m3/day) of the city and pollutes all the downstream water bodies. Indeed, it is a tributary of the Sebou River, a major body of great economical importance used for irrigation and freshwater supply. This study aims at characterising and quantifying the pollutant concentrations and fluxes in various points of oued Fez's hydrological network and assessing its impact on the Sebou River; this river's preservation being considered a national priority in Morocco. A coupled water quality-water quantity monitoring scheme has been implemented on oued Fez since 2008. In addition to basic hydrological data, water quality samples are collected at regular intervals at 8 locations where discharge is simultaneously measured using an Acoustic Doppler Current Profiler (ADCP). Water samples are analysed for different forms of nitrogen (nitrates, nitrites, ammonium and total nitrogen), phosphorus (soluble reactive phosphorus and total phosphorus) but also total chromium which is used in the leather tanning processes, one of the most important industrial production of the city of Fez, using a photospectrometer (Hach Lange DR 2800 VIS-photometer (Germany). The results of 17 sampling campaigns, carried out over 3 hydrological years, indicate that the rural areas contribute mostly to baseflow during the wet

  15. Ion funnel ion trap and process

    Science.gov (United States)

    Belov, Mikhail E [Richland, WA; Ibrahim, Yehia M [Richland, WA; Clowers, Biran H [West Richland, WA; Prior, David C [Hermiston, OR; Smith, Richard D [Richland, WA

    2011-02-15

    An ion funnel trap is described that includes a inlet portion, a trapping portion, and a outlet portion that couples, in normal operation, with an ion funnel. The ion trap operates efficiently at a pressure of .about.1 Torr and provides for: 1) removal of low mass-to-charge (m/z) ion species, 2) ion accumulation efficiency of up to 80%, 3) charge capacity of .about.10,000,000 elementary charges, 4) ion ejection time of 40 to 200 .mu.s, and 5) optimized variable ion accumulation times. Ion accumulation with low concentration peptide mixtures has shown an increase in analyte signal-to-noise ratios (SNR) of a factor of 30, and a greater than 10-fold improvement in SNR for multiply charged analytes.

  16. A negative ion source for alkali ions

    NARCIS (Netherlands)

    Vermeer, A.; Zwol, N.A. van

    1980-01-01

    An ion source is described which delivers negative alkali ions. With this source, which consists of a duoplasmatron and a charge exchange canal with alkali vapour, negative Li, Na and K ions are produced. The oven in which alkali metals are evaporated can reach temperatures up to 575°C.

  17. A negative ion source for alkali ions

    NARCIS (Netherlands)

    Vermeer, A.; Zwol, N.A. van

    1980-01-01

    An ion source is described which delivers negative alkali ions. With this source, which consists of a duoplasmatron and a charge exchange canal with alkali vapour, negative Li, Na and K ions are produced. The oven in which alkali metals are evaporated can reach temperatures up to 575°C.

  18. Obesidade e asma: associação ou epifenômeno?

    Directory of Open Access Journals (Sweden)

    Larissa Smiljanic Andrade

    2013-06-01

    Full Text Available OBJETIVO: Avaliar a associação entre obesidade e asma pela comparação entre idade, gênero, classificação inicial e controle da asma, valores de volume expiratório forçado no primeiro segundo (VEF1 e fluxo expiratório forçado entre 25 e 75% (FEF25-75% basais com os índices de massa corpórea (IMC em adolescentes asmáticos. MÉTODOS: Estudo transversal envolvendo 120 pacientes (1,9 masculino:1 feminino asmáticos com mediana de idade de 14,1 anos (9 a 20,1 anos, classificados quanto ao controle e gravidade da asma e avaliados pela espirometria utilizando VEF1 e FEF25-75% basais. Esses dados foram descritos pela frequência, médias e desvio padrão ou medianas e variação, sendo analisados pelos testes de ANOVA, teste t não pareado, teste exato de Fisher, Kruskal-Wallis e pela correlação de Pearson, considerando-se significante p<0,05. RESULTADOS: Não houve diferença entre os gêneros em relação à classificação inicial da asma e ao nível de controle. Receberam classificação inicial persistente 91,7% (100 casos, sendo que 106 casos (88,3% encontravam-se parcial ou totalmente controlados. Não houve diferença estatística entre os pacientes controlados e os demais em relação ao IMC. Não foram encontradas correlações significantes entre zIMC e VEF1 e entre zIMC e FEV25-75%, analisando-se todos os pacientes e apenas pacientes com sobrepeso ou obesos. CONCLUSÕES: Neste estudo, não foi encontrada correlação significante entre sobrepeso/obesidade e asma, utilizando-se parâmetros clínicos, antropométricos e espirométricos.

  19. Baixo peso ao nascer e obesidade: associação causal ou casual?

    Directory of Open Access Journals (Sweden)

    Adolfo Monteiro Ribeiro

    2015-09-01

    Full Text Available ResumoObjetivo:Apresentar as bases conceituais que explicam como eventos na vida intrauterina podem influenciar o desenvolvimento corporal e enfatizar a interrelação entre baixo peso ao nascer e risco de obesidade ao longo da vida.Fontes de dados:Google Scholar, Scientific Electronic Libraty Online (SciELO, EBSCO, Scopus e PubMed foram as bases de dados. “Catch-up growth”, “lifecourse health”, “disease”, “child”, “development”, “early life”, “perinatal programming”, “epigenetics”, “breastfeeding”, “small baby syndrome”, “phenotype”, “micronutrients”, “maternal nutrition”, “obesity” e “adolescence” foram descritores isolados ou associados para localizar revisões, estudos epidemiológicos, de intervenção ou experimentais publicados entre 1934 e 2014, com textos integrais, em português e inglês. Excluíram-se duplicidades, editoriais, resenhas e abordagens de doença diferente da obesidade.Síntese dos dados:Nos 47 artigos selecionados dentre 538 elegíveis, identificaram-se as hipóteses do fenótipo poupador, dos mecanismos epigenéticos e da plasticidade do desenvolvimento como fundamentais para explicar mecanismos envolvidos na saúde e nas doenças durante a vida. Elas admitem a possibilidade de eventos cardiometabólicos e obesidade terem origem em deficiência intraútero de nutrientes que, associados a suprimento alimentar excessivo às necessidades metabólicas nas fases precoces da vida, provoca alterações endócrinas. Todavia pode haver reprogramação fenotípica que supere ambiente restritivo intrauterino para nascidos com baixo peso a partir de oferta nutricional adequada. Assim, o catch-up growth indicaria recuperação da restrição intrauterina e se associaria a benefícios em curto prazo ou prejuízos no adulto.Conclusões:Na dependência de adequação nutricional nos primeiros anos de vida, a plasticidade do desenvolvimento pode levar à reprogramação fenot

  20. Les suidés du cardial : sangliers ou cochons ?

    OpenAIRE

    Helmer, Daniel

    2014-01-01

    Si la domestication de la chèvre et du mouton semble s’être généralisée assez rapidement au cours du VIP millénaire au Proche-Orient, il n’en a pas été de même pour le porc. Son élevage a pu commencer assez tôt au milieu du 7e millénaire à Jarmo (Irak) et Nea Nikomedeia (Grèce) ou se dérouler plus tardivement au milieu du 6e à Ras-Shamra (Syrie). Par conséquent la présence du porc au 6e millénaire en France est à vérifier.Les suidés sont rares dans les faunes et la distinction porc/sanglier e...

  1. Hong-Ou-Mandel interference between two independent all fiber photon sources

    CERN Document Server

    Zhou, Zhi-Yuan; Xu, Zhao-Huai; Wang, Shuang; Xu, Li-Xin; Shi, Bao-Sen; Guo, Guang-Can

    2016-01-01

    Guided-wave platforms such as fiber and silicon-on-insulator waveguide show great advances over traditional free space implementations in quantum information technology for significant advantages of low transmission loss, low cost, integrability and compatible with mature fiber communication systems. Interference between independent photon sources is the key to realize complex quantum systems for more sophisticated applications such as multi-photon entanglement generation and quantum teleportation. In this work, we report Hong-Ou-Mandel interference between two independent all fiber photon pair sources over two 100GHz dense wave division multiplexing channels, the visibility reaches 53.2(8.4)% (82.9(5.3)%) without (with) back ground counts subtracted. In addition, we give a general theoretical description of the purity of the photon pair generation in dispersion shifted fiber and obtain the optimized condition for high purity photon pair generation. We also obtain a maximum coincidence to back ground ratio of...

  2. Hiperatividade: doença ou essência um enfoque da gestalt-terapia

    OpenAIRE

    Sheila Antony; Jorge Ponciano Ribeiro

    2005-01-01

    Este trabalho discute a hiperatividade considerando a metáfora do corpo da criança e o seu funcionamento psicológico, de forma a esclarecer se a sua expressão constitui doença ou um modo próprio de ser. O transtorno de déficit de atenção/hiperatividade (TDAH) tem sido extensivamente investigado em pesquisas que visam aprimorar os critérios diagnósticos e conhecer sua etiologia. Poucos estudos são orientados para elucidar a dimensão psíquica da criança hiperativa. A Gestalt-Terapia é uma abord...

  3. Lutte Contre le Choléra, ou Contre la Culture ?

    Directory of Open Access Journals (Sweden)

    H. Lamaison Marqui

    2014-12-01

    Full Text Available Among the major obstacles in the fight against the cholera epidemic in Madagascar from 1999 to 2000, the non-use of latrines and funeral rites are qualified of ‘cultural barriers’. Is it possible, necessary or desirable to change the culture of the population, or that of professionals?Parmi les principaux obstacles de la lutte contre l’épidémie de choléra à Madagascar en 1999 et 2000, la non utilisation de latrines et les rites funéraires sont qualifiés de ‘freins culturels’. Est-il possible, nécessaire et souhaitable de modifier la culture des habitants, ou celle des professionnels ? 

  4. Hong-Ou-Mandel atom interferometry in tunnel-coupled optical tweezers

    Science.gov (United States)

    Lester, Brian; Kaufman, Adam; Reynolds, Collin; Wall, Michael; Foss-Feig, Michael; Hazzard, Kaden; Rey, Ana Maria; Regal, Cindy

    2014-05-01

    We present recent work in which we demonstrate near-complete control over all the internal and external degrees of freedom of laser-cooled 87Rb atoms trapped in sub-micron optical tweezers. Utilizing this control for two atoms in two optical tweezers, we implement a massive-particle analog of the Hong-Ou-Mandel interferometer where atom tunneling plays the role of the photon beamsplitter. The interferometer is used to probe the effect of atomic indistinguishability on the two-atom dynamics for a variety of initial conditions. These experiments demonstrate the viability of the optical tweezer platform for bottom-up generation of low-entropy quantum systems and pave the way toward the direct observation of quantum dynamics in more complex finite-sized systems.

  5. O fazer da enfermeira no sistema local de saúde: individual ou coletivo?

    Directory of Open Access Journals (Sweden)

    Marluce Maria Araújo Assis

    1996-09-01

    Full Text Available Este ensaio consiste em uma reflexão teórica acerca do fazer da enfermeira no Sistema Local de Saúde (SILOS, permitindo compreender (ainda que provisoriamente se o espaço que vem sendo ocupado pela mesma, na "porta de entrada" dos serviços de saúde, tem possibilitado uma construção ideológica de sua ação social, enquanto sujeito coletivo ou individual. Assim, procuramos nos pautar teoricamente no pensamento de Testa (1995 e apontamos o SILOS, enquanto um espaço social de transformação do Sistema de Saúde. Discutimos também, as relações vivenciadas no cotidiano da organização institucional, tentando entender o processo de produção de sujeitos sociais, focalizando a enfermeira nesta construção.

  6. Dor na psicanálise - física ou psíquica?

    Directory of Open Access Journals (Sweden)

    Natália Amendola Santos

    2014-09-01

    Full Text Available A dor tem se apresentado contemporaneamente como um tema importante para a psicanálise. Um dos móveis desse interesse é a fibromialgia, descrita por profissionais da medicina como uma síndrome caracterizada pela dor crônica na ausência de lesões ou sinais de anormalidade na maquinaria biológica. Levanta-se o impasse - como pensar psicanaliticamente uma dor que é física? Algumas leituras são propostas, tais como associações da dor com o estado melancólico, com inibições psíquicas e com a hipocondria. A dor é tomada como expressão de uma vivência traumática e não simbolizada.

  7. An integrated quantum photonic sensor based on Hong-Ou-Mandel interference

    CERN Document Server

    Basiri-Esfahani, Sahar; Armin, Ardalan; Combes, Joshua; Milburn, Gerard J

    2015-01-01

    Photonic-crystal-based integrated optical systems have been used for a broad range of sensing applications with great success. This has been motivated by several advantages such as high sensitivity, miniaturization, remote sensing, selectivity and stability. Many photonic crystal sensors have been proposed with various fabrication designs that result in improved optical properties. Here we propose a novel multi-purpose sensor architecture that can be used for force, refractive index and possibly local temperature detection. In this scheme, two coupled cavities behave as an "effective beam splitter". The sensor works based on fourth order interference (the Hong-Ou-Mandel effect) and requires a sequence of single photon pulses and consequently has low pulse power. Changes in the parameter to be measured induce variations in the effective beam splitter reflectivity and result in changes to the visibility of interference. We demonstrate this generic scheme in coupled L3 photonic crystal cavities as an example and...

  8. Laser cooling atoms to indistinguishability: Atomic Hong-Ou-Mandel interference and entanglement through spin exchange

    Science.gov (United States)

    Kaufman, Adam

    2016-05-01

    Motional control of neutral atoms has a rich history and increasingly interest has turned to single-atom control. In my thesis work, we created a platform to individually prepare single bosonic atoms in highly pure quantum states, by developing methods to laser cool single atoms to the vibrational ground state of optical tweezer traps. Applying this toolset, we observe the atomic Hong-Ou-Mandel effect when we arrange for atom tunneling to play the role of a balanced beam splitter between two optical tweezers. In another experiment, we utilize spin exchange to create entanglement, which we then verify after spatially separating the atoms to observe their non-local correlations. Merging these results with our recent demonstration of deterministic loading of atomic arrays, our results establish the concept of quantum gas assembly, which could be applied to a variety of systems ranging from the production of single dipolar molecules to the assembly of low-entropy arrays of atoms.

  9. Optimal quantum cloning of orbital angular momentum photon qubits via Hong-Ou-Mandel coalescence

    CERN Document Server

    Nagali, Eleonora; Sciarrino, Fabio; De Martini, Francesco; Marrucci, Lorenzo; Piccirillo, Bruno; Karimi, Ebrahim; Santamato, Enrico; 10.1038/nphoton.2009.214

    2010-01-01

    The orbital angular momentum (OAM) of light, associated with a helical structure of the wavefunction, has a great potential for quantum photonics, as it allows attaching a higher dimensional quantum space to each photon. Hitherto, however, the use of OAM has been hindered by its difficult manipulation. Here, exploiting the recently demonstrated spin-OAM information transfer tools, we report the first observation of the Hong-Ou-Mandel coalescence of two incoming photons having nonzero OAM into the same outgoing mode of a beam-splitter. The coalescence can be switched on and off by varying the input OAM state of the photons. Such effect has been then exploited to carry out the 1 \\rightarrow 2 universal optimal quantum cloning of OAM-encoded qubits, using the symmetrization technique already developed for polarization. These results are finally shown to be scalable to quantum spaces of arbitrary dimension, even combining different degrees of freedom of the photons.

  10. Hong-Ou-Mandel interference of entangled Hermite-Gauss modes

    CERN Document Server

    Zhang, Yingwen; Karimi, Ebrahim; Forbes, Andrew

    2016-01-01

    Hong-Ou-Mandel (HOM) interference is demonstrated experimentally for entangled photon pairs in the Hermite-Gauss (HG) basis. We use two Dove prisms in one of the paths of the photons to manipulate the entangled quantum state that enters the HOM interferometer. It is demonstrated that, when entangled photon pairs are in a symmetric Bell state in the Laguerre-Gauss (LG) basis, then they will remain symmetric after decomposing them into the HG basis, thereby resulting in no coincidence events after the HOM interference. On the other hand, if the photon pairs are in an antisymmetric Bell state in the LG basis, then they will also be antisymmetric in the HG basis, thereby producing only coincidence events as a result of the HOM interference.

  11. Hiperatividade: doença ou essência um enfoque da gestalt-terapia

    Directory of Open Access Journals (Sweden)

    Sheila Antony

    Full Text Available Este trabalho discute a hiperatividade considerando a metáfora do corpo da criança e o seu funcionamento psicológico, de forma a esclarecer se a sua expressão constitui doença ou um modo próprio de ser. O transtorno de déficit de atenção/hiperatividade (TDAH tem sido extensivamente investigado em pesquisas que visam aprimorar os critérios diagnósticos e conhecer sua etiologia. Poucos estudos são orientados para elucidar a dimensão psíquica da criança hiperativa. A Gestalt-Terapia é uma abordagem fenomenológico-existencial assentada em teorias holísticas que reconhecem a multidimensionalidade do humano, enfocando a relação (o contato como ontológica à existência humana.

  12. Sorte ou habilidade: uma avaliação dos fundos de investimento no Brasil

    Directory of Open Access Journals (Sweden)

    Elaine Cristina Borges

    2015-06-01

    Full Text Available RESUMO Neste estudo, verifica-se se os retornos dos fundos de investimento no Brasil decorrem da habilidade dos gestores ou apenas do fator sorte. Foi utilizada a metodologia de Fama e French, que concluem pela irrelevância da habilidade nos Estados Unidos da América. Para estimar a distribuição de alfas que seriam obtidos por mera sorte, foram gerados dez mil fundos simulados a partir de sorteios dentre os retornos dos fundos reais em cada mês. Na comparação dos alfas simulados com os reais, evidenciou-se haver habilidade na geração de retornos anormais positivos, especialmente pelos gestores dos fundos grandes.

  13. Thérèse et Louise, ou le plaisir sous la contrainte

    Directory of Open Access Journals (Sweden)

    Jean-Pierre Cavaillé

    2009-01-01

    Full Text Available Nous nous proposons de confronter ici Thérèse philosophe, dont l’attribution à Boyer d’Argens semble désormais à peu près certaine, à quelques unes de ses sources du siècle précédent, et en particulier, aux Dialogues de Louisa Sigea, sous leurs deux formes majeures, l’original latin attribué à Nicolas Chorier ou à son patron Salvaing de Boissieu, publié d’abord en 1659, et sa très belle transposition, plutôt que traduction au sens strict, de 1680, l’Académie des Dames, qui contient à la fois ...

  14. LA COMPTABILITÉ DES ACTIFS OU DES IMMOBILISATIONS NON COURANTS ET DISPONIBLES POUR VENTE

    Directory of Open Access Journals (Sweden)

    Lucian-Dorel ILINCUŢĂ

    2010-06-01

    Full Text Available IFRS 5 Actifs non courants destinés à être vendus et activités abandonnées prévoie qu’une entité cataloguera un actif immobilisé (ou groupe d’actifs destinés à la cession comme destiné à être vendu, si sa valeur comptable est récupérée premièrement par une opération de vente et non pas par son utilisation continue. Les règlements comptables de Roumanie prévoient le transfert des actifs immobilisés destinés à être vendus aux stocks.

  15. Kinetics of biological hydrogen production by the photosynthetic bacterium Rhodobacter sphaeroides O.U. 001

    Energy Technology Data Exchange (ETDEWEB)

    Koku, Harun; Eroglu, I. [Middle East Technical Univ., Ankara (Turkey). Dept. of Chemical Engineering; Gunduz, U.; Yucel, M. [Middle East Technical Univ., Ankara (Turkey). Dept. of Biology; Turker, L. [Middle East Technical Univ., Ankara (Turkey). Dept. of Chemistry

    2003-04-01

    The kinetics and the effects of various parameters on hydrogen production by Rhodobacter sphaeroides O.U. 001 were investigated in a batch column photobioreactor. In particular, the effect of the inoculum age and the implementation of a light-dark cycle illumination scheme for emulating natural sunlight have been investigated in detail. The possibility of using yeast extract to replace the rather expensive vitamin mixture in the medium was also studied. The results show that hydrogen production is decreased when the initially inoculated bacteria have a high culture age. Exposure of the bacterial culture to light-dark cycles increased the amount of hydrogen compared to continuous illumination, all other parameters remaining the same. Similarly, the use of yeast extract to replace the vitamins increased the growth and hydrogen production rates, however, with a slight reduction in the total amount of gas produced and the hydrogen fraction in the evolved gas. (Author)

  16. Deux types de prédication, avec ou sans sujet: quelques illustrations colombiennes

    Directory of Open Access Journals (Sweden)

    1994-01-01

    Full Text Available Toutes les langues ne suivent pas dans leurs énoncés-phrases la division morpho-syntaxique Sujet / Prédicat. Plutôt que d’organiser le contenu de l’énoncé à partir d’une des entités dont on parle, certaines langues partent de ce qui est dit de ces entités, que cela soit appelé prédicat ou relation prédicative ou fonction prédicative, etc... Cette différente perspective se manifeste alors en un schéma de construction qu’on peut appeler “schéma holophrastique”, distinct du schéma “subjectal” ou schéma sujet / prédicat. L’article cherche à mettre à l’épreuve l’intérêt de cette distinction de schémas en en montrant l’usage dans quelques langues amazoniennes dont certaines sont présentées dans ce recueil. On voit que l’opposition entre schémas prédicatifs renvoie à une dimension qui doit être maintenue distincte de l’aspect ou de la voix, même si ces trois dimensions s’entrecroisent constamment. PREDICACIÓN CON SUJETO, PREDICACIÓN SIN SUJETO: EJEMPLOS COLOMBIANOS. No todas las lenguas siguen en sus oraciones la división morfosintáctica Sujeto vs. Predicado. En vez de organizar el contenido de la oración a partir de una de las entidades de las cuales se está hablando, algunas lenguas prefieren partir de lo que se dice de estas entidades, llámese predicado, relación predicativa, función predicativa, etc... Esta diferencia de punto de partida o de perspectiva se manifiesta en un esquema de construcción que llamamos “esquema holofrástico”, bien diferente del esquema sujeto/predicado llamado también “esquema subjetal”. Este artículo trata de poner a prueba el interés de esta oposición de esquemas mostrando su uso en algunas de las lenguas amazónicas, algunas de las cuales hacen parte de este compendio. Se ve por ejemplo que los esquemas predicativos remiten a una dimensión semántica distinta de la del aspecto o de la de la voz aún cuando estas tres dimensiones se entrecruzan

  17. Alcoolismo: acusação ou diagnóstico? Alcoholism: indictment or diagnosis?

    Directory of Open Access Journals (Sweden)

    Delma Pessanha Neves

    2004-02-01

    Full Text Available O artigo apresenta reflexões orientadoras da construção do consumo de bebidas alcoólicas como objeto sociológico, inclusive das formas proscritas articuladas à definição de patologias ou ao desrespeito a regras morais. Mediante considerações sobre o investimento acumulado por processo de pesquisa em curso, a autora destaca os dilemas éticos e epistemológicos enfrentados por antropólogos que se dedicam ao tema.This article presents reflections on how alcohol consumption is conceived as a sociological object, including proscribed forms linked to the definition of diseases or disregard for moral norms. Through considerations on the accumulated investment in a research process currently under way, the author highlights the ethical and epistemological dilemmas faced by anthropologists who focus on this issue.

  18. Multiparticle Correlations in Mesoscopic Scattering: Boson Sampling, Birthday Paradox, and Hong-Ou-Mandel Profiles

    Science.gov (United States)

    Urbina, Juan-Diego; Kuipers, Jack; Matsumoto, Sho; Hummel, Quirin; Richter, Klaus

    2016-03-01

    The interplay between single-particle interference and quantum indistinguishability leads to signature correlations in many-body scattering. We uncover these with a semiclassical calculation of the transmission probabilities through mesoscopic cavities for systems of noninteracting particles. For chaotic cavities we provide the universal form of the first two moments of the transmission probabilities over ensembles of random unitary matrices, including weak localization and dephasing effects. If the incoming many-body state consists of two macroscopically occupied wave packets, their time delay drives a quantum-classical transition along a boundary determined by the bosonic birthday paradox. Mesoscopic chaotic scattering of Bose-Einstein condensates is, then, a realistic candidate to build a boson sampler and to observe the macroscopic Hong-Ou-Mandel effect.

  19. Hong-Ou-Mandel interference of entangled Hermite-Gauss modes

    Science.gov (United States)

    Zhang, Yingwen; Prabhakar, Shashi; Rosales-Guzmán, Carmelo; Roux, Filippus S.; Karimi, Ebrahim; Forbes, Andrew

    2016-09-01

    Hong-Ou-Mandel (HOM) interference is demonstrated experimentally for entangled photon pairs in the Hermite-Gauss (HG) basis. We use two Dove prisms in one of the paths of the photons to manipulate the entangled quantum state that enters the HOM interferometer. It is demonstrated that, when entangled photon pairs are in a symmetric Bell state in the Laguerre-Gauss (LG) basis, they will remain symmetric after decomposing them into the HG basis, thereby resulting in no coincidence events after the HOM interference. On the other hand, if the photon pairs are in an antisymmetric Bell state in the LG basis, then they will also be antisymmetric in the HG basis, thereby producing only coincidence events as a result of the HOM interference.

  20. Direct observation of phase-sensitive Hong-Ou-Mandel interference

    Science.gov (United States)

    Marek, Petr; Zapletal, Petr; Filip, Radim; Hashimoto, Yosuke; Toyama, Takeshi; Yoshikawa, Jun-ichi; Makino, Kenzo; Furusawa, Akira

    2017-09-01

    The quality of individual photons and their ability to interfere are traditionally tested by measuring the Hong-Ou-Mandel photon bunching effect. However, this phase-insensitive measurement only tests the particle aspect of the quantum interference, leaving out the phase-sensitive aspects relevant for continuous-variable processing. To overcome these limitations we formulate a witness capable of recognizing both the indistinguishability of the single photons and their quality with regard to their continuous-variable utilization. We exploit the conditional nonclassical squeezing and show that it can reveal both the particle and the wave aspects of the quantum interference in a single set of direct measurements. We experimentally test the witness by applying it to a pair of independent single photons retrieved on demand.

  1. COMO NÃO LER FOUCAULT E DELEUZE? OU: PARA LER FOUCAULT E DELEUZE POLITICAMENTE

    Directory of Open Access Journals (Sweden)

    Rodrigo Nunes

    2015-07-01

    Full Text Available O artigo discute como interpretar a dimensão política da obra de Michel Foucault e Gilles Deleuze (com ou sem seu parceiro de escritura Félix Guattari, contrapondo-se a tendências e clichês interpretativos que são comuns tanto a alguns críticos quanto a alguns partidários destes autores. Em particular, questiona a ideia de que, para ambos, haveria uma relação de exclusividade mútua entre “micro” e “macropolítica”, tema que desenvolve em direções conexas – no tocante, por exemplo, a forma como ética e política se articulam no pensamento dos dois.

  2. Maurice Couturier. Nabokov ou la cruauté du désir.

    Directory of Open Access Journals (Sweden)

    René Alladaye

    2006-04-01

    Full Text Available La lecture peut avoir partie liée avec la transgression. Maurice Couturier en apporte la preuve dans son dernier ouvrage, Nabokov ou la cruauté du désir, en enfreignant l’un des plus célèbres interdits nabokoviens, celui de la lecture psychanalytique de son œuvre. On se souvient des préfaces des romans où l’auteur ne se fait jamais faute de décourager la moindre velléité freudienne et d’une réponse des plus tranchantes administrée dans le cadre d’un entretien : « Laissons les crédules et les ...

  3. Interactions between the hydrology and hydrochemistry of an intermittent southern Mediterranean River- Oued Fez (Morocco)

    Science.gov (United States)

    Perrin, J.-L.; Bellarbi, M.; Chahinian, N.; Raïs, N.; Moulin, P.; Ijjaali, M.

    2012-04-01

    Mediterranean catchments are often characterized by highly variable rainfall inputs and intermittent flows. In comparison to the existing knowledge on their hydrological behaviour, the interactions between flow conditions and pollution levels remain less documented. This study aims at filling that gap through a case study on Oued Fez (Morocco). Oued Fez is an intermittent river located in central-eastern Morocco. It has a 615 km2 catchment 10% of which corresponds to the city of Fez, the 3rd biggest in the kingdom (1.2 M inhabitants). Oued Fes is a tributary of the Sebou River, a major body of great economical importance used for irrigation and freshwater supply. A coupled water quality-water quantity monitoring scheme has been implemented on Oued Fez since 2008. In addition to basic hydrological data, water quality samples are collected at regular intervals at 8 locations where discharge is simultaneously measured using an Acoustic Doppler Current Profiler (ADCP). Water samples are analysed for different forms of nitrogen (nitrates, nitrites, ammonium and total nitrogen) and phosphorus (soluble reactive phosphorus and total phosphorus) using a photospectrometer (Hach Lange DR 2800 VIS-photometer (Germany). The results of the study indicate that, despite variations in annual rainfall, the catchment's hydrological response is controlled by the urban impervious zones during floods. The rural areas contribute mostly to baseflow during the wet period while non-treated anthropogenic inputs constitute most of the flow during the dry period. This in turn affects the water quality results. Indeed: - during low flow conditions the pollution levels are very high and total nitrogen and total phosphorus concentrations reach 45 mg/l N and 6.5 mg/l P respectively at the most polluted sites. - during average and high flow conditions the pollution levels decrease due to dilution. Total nitrogen and total phosphorus concentrations reach 32 mg/l N and 3.5 mg/l P respectively with

  4. Por uma pragmática da inutilidade, ou o valor do inframince

    Directory of Open Access Journals (Sweden)

    Erin Manning

    2016-04-01

    Full Text Available Duchamp descreve o inframince2 como “o mais ín mo dos intervalos, ou a mínima das diferenças” (DUCHAMP apud PERLOFF, 2002, p. 101. Tomando o trabalho e a proposição de Duchamp no sentido de que o inframince não pode ser descrito como tal – “dele só é possível dar exemplos” (DUCHAMP apud DE DUVE, 1991, p. 160 –, este artigo explora como ele chega à expressão e pergunta como seria uma política do inframince. Ponto chave dessa exploração é saber de que outra forma pode o valor ser de nido e como repensar esse conceito compõe com a noção de pragmática especulativa.

  5. Pensar a violência ou os limites do político

    OpenAIRE

    André Lévy

    2004-01-01

    Se levamos em conta a importância dada pela mídia aos fenômenosde violência – crimes, ataques às pessoas, à sua liberdade ou seusbens, massacres coletivos, atentados... – vemos que eles são umadas questões maiores de nosso tempo. O que significa sua irrupção,que ameaça a paz e a ordem públicas? Se eles traduzem as pulsõesde ódio e de destrutividade, portanto a responsabilidade daquelesque os perpetram, essa responsabilidade deve ser, pelo menos,nuançada, para que não esqueçamos o papel essenc...

  6. Tensions et résolutions : musicalité de l’intrigue ou intrigue musicale ?

    Directory of Open Access Journals (Sweden)

    Raphaël Baroni

    2011-12-01

    Full Text Available Dans son fameux commentaire de Sarrazine, Barthes soutient qu’il y a « même contrainte dans l’ordre progressif de la mélodie et dans celui, tout aussi progressif, de la séquence narrative ». Werner Wolf affirme quant à lui que « la musique peut créer du suspense par le biais de passage disharmonieux ou par des excursions dans des tonalités étrangères qui précèdent l’arrivée de résolutions harmonieuses ou le retour à la tonalité de base ». Dans ces lignes, nous aimerions montrer que si nous acceptons de redéfinir l’intrigue, non comme la trame de l’histoire racontée, mais comme une forme dynamique qui dépend d’une progression passant par des phases de tension et de détente, cette dernière ne constitue plus le point de divergence principal entre récit et musique, mais, au contraire, l’un des points de convergence les plus évidents.In his famous commentary of Sarrazine, Barthes argues that there is “the same constraint in the progressive order of the melody and in the narrative sequence, which is equally progressive”. Werner Wolf states meanwhile that “music can create suspense by disharmonious passages or excursions into foreign keys which before coming to harmonious resolutions or returning to the home key.” In these lines, we aim to show that if we agree to redefine the plot, not as the structure of the story told, but as a dynamic form that depends on a progression through phases of tension and resolution, it is no longer the main gap between narrative and music, but, on the contrary, one of the most obvious feature that they share.

  7. A Psicanálise para Foucault: ontologia ou Hermenêutica?

    Directory of Open Access Journals (Sweden)

    Carolina de Souza Noto

    2016-03-01

    Full Text Available RESUMO: O presente artigo tem como objetivo discutir o estatuto que Foucault confere à psicanálise. Em As palavras e as coisas, de 1966, Foucault condena todo tipo de reflexão que procura conferir estatuto ontológico à finitude humana. Nesse sentido, faz-se necessário investigar se a crítica que Foucault endereça à psicanálise depois de 66 se dá nos mesmos termos que a crítica feita às analíticas da finitude. Ou seja, trata-se de entender se a acusação de que a psicanálise não passa de mais um "dispositivo de sexualidade" a serviço do biopoder está fundada na ideia de que a psicanálise supõe uma ontologia. A ideia da psicanálise como ontologia, contudo, é uma tese recusada por Foucault em alguns escritos da década de 50 e 60. Nesse período, o filósofo defende que a psicanálise é antes de tudo um método hermenêutico e não uma teoria geral sobre o homem. Assim, se é verdade que as teses genealógicas finais de Foucault sobre a psicanálise se fundamentam na visão da psicanálise como ontologia, deparamo-nos com um problema: afinal, a psicanálise, para Foucault, consiste ou não numa teoria sobre o ser do homem?

  8. Septoplastia com ou sem tamponamento pós-operatório? Estudo prospectivo

    Directory of Open Access Journals (Sweden)

    Maria Teresa Bernardo

    2013-08-01

    Full Text Available O tamponamento nasal anterior é efetuado num grande número de cirurgias nasais, nomeadamente na septoplastia. Contudo, não é um procedimento inócuo pelo que o seu benefício tem vindo a ser questionado. OBJETIVO: Avaliar a necessidade do tamponamento nasal anterior e a qualidade de vida nos doentes submetidos à septoplastia. MÉTODO: Doentes submetidos à septoplastia, com ou sem turbinoplastia inferior, foram randomizados para a colocação ou não de tamponamento nasal anterior no pós-operatório. Foram registados e comparados os dados relativos ao pós-operatório (dor, hemorragia. A qualidade de vida foi avaliada no pré e pós-operatório. Estudo prospetivo randomizado. RESULTADOS: Foram incluídos 73 doentes (37 tamponados e 36 não tamponados com seguimento mínimo de 3 meses. Nos doentes tamponados, a dor nasal e as cefaleias no pós-operatório imediato foram superiores. Destes doentes, 75,7% referiram dor moderada/intensa no destamponamento. Nos doentes não tamponados, a hemorragia foi mais frequente, mas apenas um doente necessitou tamponamento. Houve melhoria da qualidade de vida em todos os doentes. CONCLUSÃO: A septoplastia melhora a qualidade de vida do doente com desvio do septo e obstrução nasal. O uso por rotina do tamponamento nasal anterior deve ser questionado por não apresentar benefício comprovado.

  9. Valor do escore de calcio coronariano para prever a gravidade ou complexidade da doenca arterial coronariana

    Directory of Open Access Journals (Sweden)

    Tayyar Gokdeniz

    2014-03-01

    Full Text Available FUNDAMENTO: A previsão de gravidade ou complexidade da doença arterial coronariana (DAC é valiosa devido ao aumento do risco de eventos cardiovasculares. Embora a associação entre o escore do cálcio arterial coronariano (CAC, e a gravidade da DAC pelo escore Gensini não tenha sido utilizado, já foi anteriormente demonstrado. Não há informações sobre a associação entre o escore do CAC total e a complexidade da DAC. OBJETIVOS: Investigar a associação entre a gravidade ou complexidade da doença arterial coronariana (DAC, avaliada pelo escore Gensini e SYNTAX (SS, respectivamente, e o escore do cálcio arterial coronariano (CAC, um método não invasivo para avaliação de DAC em pacientes sintomáticos com DAC significativa. MÉTODOS: Duzentos e quatorze pacientes foram incluídos. A pontuação total do CAC foi obtido antes da angiografia. A severidade e complexidade da DAC foram avaliadas pelo escore Gensini e SS, respectivamente. Foram analisadas as associações entre parâmetros clínicos e angiográficos e o escore total do CAC. RESULTADOS: A mediana do escore total do CAC foi de 192 (23,0-729,8, e correlacionou-se positivamente com ambos os escores Gensini (r: 0,299, p 809 para ES > 32 (tercil de SS alto. CONCLUSÃO: Em pacientes sintomáticos com DAC significativa, o escore total de CAC foi independentemente associado com SS e os pacientes com SS > 32 podem ser detectados através de escore Agatston alto.

  10. Kafka e Josefina, ou: a solidão da singularidade

    Directory of Open Access Journals (Sweden)

    Ricardo Timm de Souza

    2015-02-01

    Full Text Available ResumoO texto tem como objetivo avançar na direção deuma interpretação mais ampla da última grande obra de Kafka,“Josefina a cantora, ou O povo dos camundongos”, nosentido de compreender a posição de Josefina na narrativanão apenas como prototípica em relação ao artista ou escritorna solidão do exercício de seu métier, mas, muito mais, comouma lógica da narratividade da solitária singularidade do intelectualcomo tal.Palavras-chave: Kafka, Josefina, solidão, singularidade, intelectual. AbstractThe text aims to advance in the direction of an enlargedinterpretation of the last great Kafka’s work, “Josephinedie Sängerin, oder das Volk der Mäuse”, as a means of understandingJosephine’s position in the narrative not only asis generally accepted, as prototypical of the artist or writer inTerceira Margem (online – ano xvii n. 28 /jul.-dez. 2013 138A solidão da singularidade, r. t. souza | p. 137-193the execution of their métier, but also, and more importantly,as a logic of narration regarding the intellectual’s lonely singularityas such.Keywords: Kafka, Josephine, loneliness, singularity, intellectual.Ricardo Timm de Souza (Farroupilha (RS, 1962 é Professor Titular da FFCH/PUCRS, doutor em Filosofia pela Albert-Ludwigs-Universität Freiburg (1994, atuante nos Programas de Pós-graduação em Filosofia, Letras e Ciências criminais da PUCRS. Autor de 22 livros e 12 coletâneas organizadas.www.timmsouza.blogspot.com.br.

  11. As relações de trabalho em uma empresa global: um novo paradigma ou neocorporativismo?

    Directory of Open Access Journals (Sweden)

    Arnaldo José França Mazzei Nogueira

    Full Text Available Este artigo trata das relações de trabalho em uma empresa global e foi resultado de pesquisa em uma montadora de caminhões instalada na região do ABC no Estado de São Paulo, Brasil. A empresa estudada apresenta um padrão dos mais avançados na dimensão organizacional das relações de trabalho ou no local de trabalho considerado o contexto brasileiro. A solução de conflitos do trabalho nesta empresa aponta fortemente para um padrão negocial em relação ao estatutário (Zylberstajn e Pastore, 1985, o que levou alguns autores a indicar um modo de cooperação-conflitiva para lidar com as relações de trabalho (Rodrigues, 1997 e uma via institucionalizada de inserção dos trabalhadores nos processos de inovação tecnológica e gerencial (Bresciani, 2002. O esquema montado dentro da empresa foi resultado da estratégia do sindicato no local de trabalho e da gestão da empresa em particular da gestão de recursos humanos. A análise da experiência permitiu verificar além de um paradigma avançado de relações de trabalho, a afirmação de uma tendência ao corporativismo societário ou neo-corporativismo em relação ao corporativismo estatal típico do sistema trabalhista brasileiro.

  12. ALBA, organisation interaméricaine ou vénézuélienne ?

    Directory of Open Access Journals (Sweden)

    Jean-Jacques Kourliandsky

    2011-01-01

    Full Text Available L’«Alliance Bolivarienne des peuples de notre Amérique», ou ALBA, est de toutes les organisations interaméricaines celle dont l’identité est la plus originale. S’affirmant anti-impérialiste elle donne en effet à l’idéologie une place centrale qui commande la coopération entre ses membres. Mais l’ALBA au quotidien diffère-t-elle d’autres organisations d’intégration ? Le lien entre les différents pays qui la composent n’est-il pas au-delà de l’hommage unanime rendu à Bolivar bien davantage celui de pouvoir bénéficier du pétrole vénézuélien à un prix préférentiel ? L’ALBA, comme d’autres institutions latino-américaines, ne répond-elle pas à l’ambition d’un État, en l’occurrence ici le Venezuela, plus qu’à celle de construire un projet collectif pérenne? Ce lien entre le pétrole de son initiateur vénézuélien et l’ALBA, est une garantie pour le présent. Mais l’ALBA survivrait-elle à une alternance politique au Venezuela, ou à une chute des prix du baril affectant le nerf de l’organisation ?

  13. Gas phase ion chemistry

    CERN Document Server

    Bowers, Michael T

    1979-01-01

    Gas Phase Ion Chemistry, Volume 1 covers papers on the advances of gas phase ion chemistry. The book discusses the advances in flow tubes and the measurement of ion-molecule rate coefficients and product distributions; the ion chemistry of the earth's atmosphere; and the classical ion-molecule collision theory. The text also describes statistical methods in reaction dynamics; the state selection by photoion-photoelectron coincidence; and the effects of temperature and pressure in the kinetics of ion-molecule reactions. The energy distribution in the unimolecular decomposition of ions, as well

  14. Microfabricated ion frequency standard

    Science.gov (United States)

    Schwindt, Peter; Biedermann, Grant; Blain, Matthew G.; Stick, Daniel L.; Serkland, Darwin K.; Olsson, III, Roy H.

    2010-12-28

    A microfabricated ion frequency standard (i.e. an ion clock) is disclosed with a permanently-sealed vacuum package containing a source of ytterbium (Yb) ions and an octupole ion trap. The source of Yb ions is a micro-hotplate which generates Yb atoms which are then ionized by a ultraviolet light-emitting diode or a field-emission electron source. The octupole ion trap, which confines the Yb ions, is formed from suspended electrodes on a number of stacked-up substrates. A microwave source excites a ground-state transition frequency of the Yb ions, with a frequency-doubled vertical-external-cavity laser (VECSEL) then exciting the Yb ions up to an excited state to produce fluorescent light which is used to tune the microwave source to the ground-state transition frequency, with the microwave source providing a precise frequency output for the ion clock.

  15. The different origins of magnetic fields and activity in the Hertzsprung gap stars, OU Andromedae and 31 Comae

    Science.gov (United States)

    Borisova, A.; Aurière, M.; Petit, P.; Konstantinova-Antova, R.; Charbonnel, C.; Drake, N. A.

    2016-06-01

    Context. When crossing the Hertzsprung gap, intermediate-mass stars develop a convective envelope. Fast rotators on the main sequence, or Ap star descendants, are expected to become magnetic active subgiants during this evolutionary phase. Aims: We compare the surface magnetic fields and activity indicators of two active, fast rotating red giants with similar masses and spectral class but different rotation rates - OU And (Prot = 24.2 d) and 31 Com (Prot = 6.8 d) - to address the question of the origin of their magnetism and high activity. Methods: Observations were carried out with the Narval spectropolarimeter in 2008 and 2013. We used the least-squares deconvolution (LSD) technique to extract Stokes V and I profiles with high signal-to-noise ratio to detect Zeeman signatures of the magnetic field of the stars. We then provide Zeeman-Doppler imaging (ZDI), activity indicators monitoring, and a precise estimation of stellar parameters. We use state-of-the-art stellar evolutionary models, including rotation, to infer the evolutionary status of our giants, as well as their initial rotation velocity on the main sequence, and we interpret our observational results in the light of the theoretical Rossby numbers. Results: The detected magnetic field of OU Andromedae (OU And) is a strong one. Its longitudinal component Bl reaches 40 G and presents an about sinusoidal variation with reversal of the polarity. The magnetic topology of OU And is dominated by large-scale elements and is mainly poloidal with an important dipole component, as well as a significant toroidal component. The detected magnetic field of 31 Comae (31 Com) is weaker, with a magnetic map showing a more complex field geometry, and poloidal and toroidal components of equal contributions. The evolutionary models show that the progenitors of OU And and 31 Com must have been rotating at velocities that correspond to 30 and 53%, respectively, of their critical rotation velocity on the zero age main sequence

  16. Multicusp ion sources (invited)

    Energy Technology Data Exchange (ETDEWEB)

    Leung, K.N. (Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (United States))

    1994-04-01

    During the last decade, different types of multicusp ion sources, such as high current, high concentration H[sup +], H[sup +][sub 2], or N[sup +] ion sources, negative ion sources, radio-frequency-driven sources, and high charge state ion sources have been developed at the Lawrence Berkeley Laboratory. This article reviews the history of the research and development of these ion sources and their applications.

  17. Ion sources for ion implantation technology (invited)

    Energy Technology Data Exchange (ETDEWEB)

    Sakai, Shigeki, E-mail: sakai-shigeki@nissin.co.jp; Hamamoto, Nariaki; Inouchi, Yutaka; Umisedo, Sei; Miyamoto, Naoki [Nissin Ion Equipment co., ltd, 575 Kuze-Tonoshiro-cho Minami-ku, Kyoto 601-8205 (Japan)

    2014-02-15

    Ion sources for ion implantation are introduced. The technique is applied not only to large scale integration (LSI) devices but also to flat panel display. For LSI fabrication, ion source scheduled maintenance cycle is most important. For CMOS image sensor devices, metal contamination at implanted wafer is most important. On the other hand, to fabricate miniaturized devices, cluster ion implantation has been proposed to make shallow PN junction. While for power devices such as silicon carbide, aluminum ion is required. For doping processes of LCD fabrication, a large ion source is required. The extraction area is about 150 cm × 10 cm, and the beam uniformity is important as well as the total target beam current.

  18. Les applications des faisceaux d'ions dans la physique des polymères

    Science.gov (United States)

    Ratier, B.; Moliton, A.; Lucas, B.; Guille, B.; Clamadieu, M.

    1998-06-01

    Experimental configurations of ions beams are illustrated by diagrams in the case of low energy implantation, Reactive Ion Beam Etching (RIBE), Ion Beam Assisted Deposition (IBAD) of molecular layers (or oligomers). Nous présentons les configurations expérimentales (illustrées par des schémas) de trois applications des faisceaux d'ions au traitement physique des polymères : dopage par implantation (cité pour mémoire), gravure par faisceaux d'ions réactifs (RIBE), dépôt des couches moléculaires (ou oligomères) assistés par faisceau (IBAD).

  19. Anestesia geral inalatória ou total intravenosa associada à anestesia subaracnoidea, em ovinos

    Directory of Open Access Journals (Sweden)

    M.P.A. Lima

    2016-04-01

    Full Text Available Avaliou-se a eficácia e a segurança anestésica em ovinos mantidos sob anestesia geral inalatória com isofluorano ou anestesia total intravenosa com propofol, ambas associadas à anestesia subaracnoidea. Quatorze ovinos foram pré-medicados com 0,3mg.kg-1 de morfina IM, e cinco minutos após, receberam 20mcg.kg-1 de detomidina IV. Posteriormente, foram alocados aleatoriamente em dois grupos: GISO (n=7, os quais foram induzidos à anestesia geral com 0,5mg.kg-1 de diazepam e 5mg.kg-1 de cetamina IV, e mantidos em anestesia geral inalatória com isoflurano diluído em oxigênio a 100%; e GPRO (n=7, induzidos com 4mg.kg-1 de propofol IV seguido inicialmente de infusão contínua na taxa de 0,3mg.kg-1.min-1. Para realização da osteotomia bilateral, todos os animais receberam 0,5mg.kg-1 de ropivacaína 0,75% associado a 0,1mg.kg-1 de morfina pela via subaracnoidea. Houve redução de 40% nos valores médios de frequência cardíaca após sedação em ambos os grupos, permanecendo em média 23% reduzida até o final da avaliação. A pressão arterial média aumentou 16%, após a indução anestésica no GISO, mas se reduziu até o final do procedimento, assim como no GPRO. A EtISO média foi de 0,57V% e a taxa média de infusão do propofol foi de 0,24mg.kg-1.min-1. Os tempos totais de cirurgia, anestesia e extubação foram de 66±9,8, 92±13,8 e 7,0±1,5 minutos no GISO e 56±2,4, 82,9±4,6 e 5,4±1,5 minutos no GPRO, não havendo diferença significativa entre grupos. A manutenção anestésica com isoflurano ou propofol promoveu plano anestésico similar com mínimos efeitos cardiovasculares ou hemogasométricos, que são bem tolerados em ovinos hígidos.

  20. Cultura da rua ou cultura da escola? Street culture or school culture?

    Directory of Open Access Journals (Sweden)

    Agnès van Zanten

    2000-01-01

    Full Text Available Este artigo objetiva estudar a construção de atitudes e práticas desviantes de adolescentes de origem francesa ou imigrantes. Os dados da pesquisa foram obtidos em uma pesquisa de campo que incluiu observações e entrevistas realizadas ao longo de dois anos numa escola da periferia parisiense, A hipótese central é a de que os adolescentes dos bairros periféricos, ao ingressarem no ensino médio, já estão predispostos à cultura da escola ou à cultura da rua, cujas predisposições foram estruturadas na família, na comunidade ou nas escolas primárias. Assim, é nos colégios, em interação com processos especificamente escolares, que se desenvolvem condutas desviantes em alguns deles. Este texto evoca, primeiramente e de maneira geral, como os jovens percebem as interpelações e diferenças entre o colégio e o bairro, para em seguida voltar a atenção para três dimensões da sociabilidade adolescente que expressam as tensões entre a rua e a escola: as amizades juvenis, a sociabilidade em sala de aula e as relações interétnicas. A conclusão ressalta o peso que os processos de segregação têm para a perda da capacidade integrativa da escola, quer se tratem dos processos que ocorrrem nos estabelecimentos com um todo, quer sejam os que tomam lugar nas salas de aula.This article presents a study on the construction of deviant attitudes and practices on the part of French adolescents or immigrants. It is based on a fieldwork that included observations and interviews conducted along two years in a school of the Parisian periphery. The central hypothesis is that the adolescents of the outskirts neighborhoods, as they enter secondary school, are already predisposed to the culture of the school or to the culture of the street; predispositions that were structured in the family, in the community or in the elementary schools. Therefore, it is at the secondary schools, in interaction with processes specifically related to the school

  1. Síndrome SAPHO: entidade rara ou subdiagnosticada? SAPHO syndrome: rare or under-diagnosed?

    Directory of Open Access Journals (Sweden)

    Jozephina Gonçalves Guerra

    2005-08-01

    Full Text Available OBJETIVO: Descrever os achados clínicos, radiológicos e patológicos da síndrome SAPHO e sugerir que, apesar de ser considerada rara, esta síndrome deve estar sendo subdiagnosticada por clínicos e radiologistas, provavelmente em função do desconhecimento das suas características. MATERIAIS E MÉTODOS: Foi realizado estudo retrospectivo de seis casos confirmados desta síndrome, dando-se ênfase aos achados clínicos (idade, sexo e sintomas e de imagem (cintilografia óssea, radiografia convencional, tomografia computadorizada e ressonância magnética. RESULTADOS: A manifestação clínica inicial de todos os pacientes foi dor na parede torácica ântero-superior há pelo menos quatro meses. Todos apresentavam achados de imagem de processo inflamatório e/ou osteíte e hiperostose nas articulações da parede torácica ântero-superior. As alterações cutâneas da síndrome, tipo pustulose palmoplantar, estiveram presentes em cinco dos seis pacientes. Em nenhum dos seis casos o diagnóstico foi sugerido na consulta clínica inicial ou na primeira interpretação das imagens feita por radiologistas não especialistas em sistema músculo-esquelético. CONCLUSÃO: Os nossos achados estão de acordo com os descritos na literatura, devendo ser considerado este diagnóstico em todo paciente que apresente quadro doloroso de parede torácica acompanhado de manifestações dermatológicas e/ou osteíte.OBJECTIVE: To describe the clinical, imaging and pathological findings of SAPHO syndrome and to point out that although considered rare this syndrome may be under-diagnosed by clinicians and radiologists, probably due to unfamiliarity with its features. MATERIALS AND METHODS: A retrospective study of six cases diagnosed in the last six years, with emphasis on clinical findings (age, sex and symptoms and imaging findings (bone scintigraphy, conventional x-ray, computed tomography and magnetic resonance imaging was conducted. RESULTS: The initial

  2. Universidades corporativas: educação ou doutrinação?

    Directory of Open Access Journals (Sweden)

    Sylvia Constant Vergara

    2005-12-01

    Full Text Available A presente pesquisa foi motivada pela disseminação de iniciativas voltadas para a gestão do conhecimento no ambiente empresarial, como as chamadas Universidades Corporativas (UC, consideradas uma evolução da tradicional área de Treinamento & Desenvolvimento. Questiona-se, contudo, se tais universidades oferecem aos seus participantes subsídios para refletir, criticar, criar, agir em todas as ações inseridas no escopo da educação, ou se, ao contrário, optam pela doutrinação. Foi este questionamento crítico que desencadeou o estudo aqui apresentado, suportado por pesquisa bibliográfica e de campo. Esta última foi realizada em uma UC brasileira. Contou com a participação de 103 funcionários da empresa. Os dados foram coletados por meio de um questionário fechado, elaborado com base nas teorias de doutrinação de Ivan Snook e Olivier Reboul. Os resultados desta pesquisa revelaram que a UC pesquisada tem poucas características doutrinárias. Essa circunstância, de certa forma, fere a suposição inicial do estudo, porém suscita outras, ao seu final: a nesta UC não predomina a doutrinação e o fato de abrir-se para a pesquisa já o afirma; b por ser uma UC do setor público, a doutrinação não se faz presente, tanto quanto se faz em uma empresa privada; c a UC pesquisada tem caráter doutrinário, porém na era do conhecimento em que vivemos, as formas de doutrinação são sutis; não raro os doutrinados não as percebem. Uma nova agenda de pesquisa poderá ajudar a confirmar ou não essas suposições.

  3. Ville et prostitution : rivales ou riveraines ? City and Prostitution: Rivals or Neighbours?

    Directory of Open Access Journals (Sweden)

    Catherine Deschamps

    2008-04-01

    Full Text Available Sous l’égide de l’Association des maires des grandes villes de France s’est tenue à Nantes, en juin 2003, la “Première rencontre française et internationale des professionnels de la ville” intitulée Les politiques urbaines face à la prosti­tution. Mobilisation des villes pour la répression de la traite aux fins d’exploi­tation sexuelle, la prévention et l’aide aux victimes. À partir des “actes” de cette rencontre, d’une enquête de terrain, d’une revue de la littérature et de la presse quotidienne française pour l’année 2003, cet article questionne la généa­logie contemporaine de l’association de la prostitution aux villes et les raisons qui, à tort ou à raison, motivent cette association. Parmi ces raisons, se cache une instrumentalisation des plus ambiguës de la “jeune prostituée étrangère”, associée à son corps défendant à l’image d’une traite mondiale, donc tenta­culaire. La rencontre nantaise est alors, à l’échelle de la ville, l’illustration, ou la répétition, de mécanismes plus généraux.Under the aegis of the Association of mayors of major French cities, the “First French and international meeting of city professionals” was held at Nantes, in June 2003, entitled Urban policies in dealing with prostitution. The mobilization of cities in the repression of slavery for purposes of sexual exploitation, prevention and aid to victims. Based on the “acts” of this meeting, a field survey, a review of the literature and the daily French press for the year 2003, this article questions the contemporary genealogy of the association of prostitution and cities, and the reasons which, rightly or wrongly, motivate that association. Among these reasons, is hidden a most ambiguous instrumentalization of the “young foreign prostitute”, associated despite herself with the image of a worldwide, and hence tentacular, slave trade. Thus the Nantes meeting is, on a city scale, the

  4. L’identification et traitement du trouble panique avec ou sans agoraphobie

    Science.gov (United States)

    Foldes-Busque, Guillaume; Marchand, André; Landry, Pierre

    2007-01-01

    RÉSUMÉ OBJECTIF Renseigner les médecins de première ligne au sujet de l’identification précoce, du diagnostic et du traitement du trouble panique avec ou sans agoraphobie (TP/A). QUALITÉ DES DONNÉES Les données et recommandations présentées proviennent d’une recension des écrits scientifiques réalisée via les banques de données PsycLIT, PsyINFO et MEDLINE (1985 à 2006) en utilisant les descripteurs panic disorder, psychotherapy, psychosocial treatment, treatment et pharmacotherapy. Les recommandations formulées par les auteurs s’appuient sur des données probantes provenant d’études d’excellente qualité. Les informations concernant le diagnostic et l’évaluation du TP/A proviennent d’études épidémiologiques récentes, de consensus et d’opinions d’experts. PRINCIPAL MESSAGE Le TP/A est un trouble psychiatrique souvent rencontré en médecine de première ligne, mais il est fréquemment sous-diagnostiqué et sous-traité. L’identification précoce de ce trouble demande une attention particulière aux symptômes médicalement inexpliqués et, le cas échéant, le médecin doit utiliser des questions spécifiques permettant d’identifier d’éventuelles attaques de panique et de cerner leur signification pour le patient. Le traitement de premier choix pour ce trouble est une psychothérapie d’orientation cognitivo-comportementale administrée par un psychologue ou un psychiatre spécialisé. Si de telles ressources ne sont pas disponibles, le médecin peut opter pour un traitement psychopharmacologique. CONCLUSION Les médecins de famille peuvent jouer un rôle central dans l’identification et le traitement des patients souffrant d’un TP/A. PMID:17934032

  5. Sinergismo Bacillus, Brevibacillus e, ou, Paenibacillus na simbiose Bradyrhizobium-caupi

    Directory of Open Access Journals (Sweden)

    André Suêldo Tavares de Lima

    2011-06-01

    Full Text Available O feijão-caupi Vigna unguiculata [L.] Walp. é a principal cultura de subsistência do semiárido brasileiro, sendo fonte de proteínas de baixo custo, notadamente, para populações carentes. A produção dessa cultura no Nordeste é baixa devido à não utilização de insumos agrícolas - entre eles, o fertilizante nitrogenado. Por outro lado, bactérias promotoras de crescimento em plantas (BPCPs vêm sendo estudadas, de forma a maximizar a fixação de N2, disponibilizar nutrientes como P ou fito-hormônios e inibir doenças. Os objetivos deste trabalho foram verificar a viabilidade da coinoculação das sementes de feijão-caupi usando Paenibacillus, Brevibacillus e, ou, Bacillus e Bradyrhizobium-caupi; caracterizar as estirpes quanto à produção de ácido indol acético (AIA e solubilização de fosfato; e avaliar o sinergismo entre os microrganismos como alternativa para otimizar a FBN. Os experimentos foram conduzidos em laboratório e em casa de vegetação do Instituto Agronômico de Pernambuco (IPA, utilizando o feijão-caupi cv. "IPA - 206". As estirpes utilizadas foram: Bacillus sp. - 449, 450, 451, 461 e ANBE 31; B. cereus - 440; B. subtilis - 438, 441, 454, 455 e 459; B. pumilus - 444, 445 e 448; B. megaterium - 462; Brevibacillus brevis - 447; Paenibacillus brasilensis - 24, 172 e 177; P. graminis - MC 04.21, MC 22.13 e BR 60106; P. polymyxa - S21; e P. durus - RBN4. Os microrganismos não apresentaram capacidade para produzir AIA nem solubilizar fosfato. Ocorreu sinergismo das estirpes de Bacillus sp. (449 e Bacillus pumilus (444 coinoculadas com a estirpe de Bradyrhizobium sp. (BR 3267 no feijão-caupi.

  6. Afasia global sem hemiparesia: AVC ou transtorno conversivo? Global aphasia without hemiparesis: stroke or conversion disorder?

    Directory of Open Access Journals (Sweden)

    Daniel Philippi de Negreiros

    2007-01-01

    Full Text Available CONTEXTO: A realização de diagnóstico neurológico e psiquiátrico em ambiente de emergência hospitalar com freqüência é uma tarefa complexa e exige colaboração interdisciplinar. Um dos diagnósticos diferenciais de doenças neurológicas é o transtorno conversivo, cuja característica principal é a presença de sintomas afetando funções motoras ou sensoriais, que sugerem desordem clínica ou neurológica, porém sem doença orgânica subjacente que explique o quadro. RELATO DE CASO: Os autores relatam o caso de uma paciente de 23 anos com apresentação clínica atípica de acidente vascular cerebral, afasia global sem hemiparesia, que foi inicialmente diagnosticada como transtorno psiquiátrico pelo serviço de clínica médica de emergência. CONCLUSÃO: Certas apresentações neurológicas podem ser interpretadas como transtorno conversivo pelas similaridades clínicas entre as duas desordens, raridade do quadro clínico, pela presença de sintomatologia psiquiátrica e fatores psicossociais nos pacientes neurológicos. Mesmo com apresentações neurológicas atípicas e sintomas psiquiátricos, pacientes com quadro sugestivo de transtorno conversivo devem ser sempre investigados de forma interdisciplinar.BACKGROUND: The neurologic and psychiatric diagnosis in emergency settings are difficult tasks and require interdisciplinary effort. Conversion disorder is one of the differential diagnosis for certain neurologic disorders. The main characteristic is motor or sensory deficits suggesting neurologic or medical condition, but without organic disease that explains the symptoms. CASE REPORT: We present a 23 year-old-woman with an atypical clinical presentation of stroke: global aphasia without hemiparesis. This patient was initially diagnosed with conversion disorder by the internal medicine service in the emergency room. CONCLUSION: Some rare neurologic diseases can be interpreted as conversive disorders due to some reasons

  7. Do estado da universidade: metida num sarcófago ou no Leito de Procrustes?

    Directory of Open Access Journals (Sweden)

    Jorge Olímpio Bento

    2014-11-01

    Full Text Available Este ensaio chama a atenção para a grave doença que atingiu a Universidade nos nossos dias. O recurso à metáfora do 'sarcófago' e do 'Leito de Procrustes' visa: acentuar o facto de que a Universidade está a abandonar a sua missão tradicional e a sofrer transformações perigosas; expressar a esperança de que ela se liberte das forças que a constrangem e consiga ressuscitar numa forma nova. Com efeito, a Universidade está sendo capturada pela ideologia, pelo pensamento, pela terminologia e pelos interesses do neoliberalismo e do mercado. Consequentemente, ela perde autonomia e voz e deixa de ter identidade, linguagem e pensamento próprios. Em vez de ser uma instituição ao serviço da Humanidade, da sociedade, da cultura, da democracia e da liberdade, a Universidade torna-se um fator e instrumento de propagação das doutrinas e receitas dos potentados financeiros e 'mercadológicos'. Tudo isto é bem visível no 'reformismo' e nas orientações da sua reorganização e governação, na oferta e no perfil dos seus cursos. Tal como o mercado, a Universidade já não oferece nada; só vende. Assim, a Universidade é cúmplice e corresponsável pela crise civilizacional, cultural, ética, moral e social que grassa no mundo. Em conclusão, a Universidade está a tornar-se uma instituição humana e socialmente irrelevante, sem capacidade de irradiar influências exemplares e positivas. Para reverter a situação, os protagonistas da Universidade têm que a tirar do 'sarcófago' ou do 'Leito de Procrustes', no qual, por ação ou omissão, a deixaram aprisionar.

  8. Electron Beam Ion Sources

    CERN Document Server

    Zschornacka, G.; Thorn, A.

    2013-12-16

    Electron beam ion sources (EBISs) are ion sources that work based on the principle of electron impact ionization, allowing the production of very highly charged ions. The ions produced can be extracted as a DC ion beam as well as ion pulses of different time structures. In comparison to most of the other known ion sources, EBISs feature ion beams with very good beam emittances and a low energy spread. Furthermore, EBISs are excellent sources of photons (X-rays, ultraviolet, extreme ultraviolet, visible light) from highly charged ions. This chapter gives an overview of EBIS physics, the principle of operation, and the known technical solutions. Using examples, the performance of EBISs as well as their applications in various fields of basic research, technology and medicine are discussed.

  9. Idosos em situação de rua ou vulnerabilidade social: facilidades e dificuldades no uso de ferramentas computacionais

    Directory of Open Access Journals (Sweden)

    Marcos Antonio da Eira Frias

    2014-10-01

    Full Text Available Este estudo teve por objetivo identificar as facilidades e dificuldades encontradas por idosos em situação de rua ou vulnerabilidade social, no uso do computador ou internet. É uma pesquisa qualitativa do tipo exploratório, de que participaram cinco idosos assistidos em uma Organização não Governamental situada na cidade de São Paulo. Os discursos foram analisados pela Técnica de Análise de Conteúdo e evidenciaram como facilidades, dentre outras, esclarecer dúvidas com os monitores, o estímulo para novas descobertas aliada a proatividade e curiosidade, desenvolvimento de novas habilidades. As dificuldades estavam relacionadas a questões físicas ou cognitivas, à falta de instrutor e de conhecimento para interagir com a máquina. Os estudos voltados para a população idosa em situação de rua ou vulnerabilidade social podem contribuir com evidências que direcionem a formulação de políticas públicas voltadas para essa parcela da população.

  10. Caractérisation de la qualité des eaux de I' oued Kebir Quest (Nord ...

    African Journals Online (AJOL)

    Caractérisation de la qualité des eaux de I' oued Kebir Quest (Nord Est algérien) ... du Kebir Ouest (côté Est), est liée au contexte industriel, agricole et urbain. ... du cours d'eau par rapport aux rejets des eaux usées et l'activité agricole.

  11. Contamination métallique de l'eau et du sédiment d'Oued Bouhamra ...

    African Journals Online (AJOL)

    d'identifier les origines industrielle, agricole et domestique de cette pollution. Mots-clés : éléments traces métalliques- rejets urbains en mer – eau superficielle – sédiment - Golfe d'Annaba. ... Long de 15 km, l'oued collecte les eaux usées.

  12. Sports, olympisme et/ ou hégémonie culturelle : l'héritage des ...

    African Journals Online (AJOL)

    Sports, olympisme et/ ou hégémonie culturelle : l'héritage des communautés africaines. ... physical training: S.P.E. - Founding upon extra-sporting competition ideology such ... Key words: Sport, against culture, training,-olympism, sports for all.

  13. Lifelong Learning and the E-Strategy of the Open University of the Netherlands: ou.nl

    NARCIS (Netherlands)

    Westera, Wim; Kalz, Marco

    2008-01-01

    Westera, W., & Kalz, M. (2008). Lifelong Learning and the E-Strategy of the Open University of the Netherlands: ou.nl. In J. Stratmann & M. Kerres (Eds.), E-strategy, Strategisches Informationsmanagement für Forschung und Lehre, Medien in de Wissenschaft Band 46 (pp. 253-266). Gesellschaft für Medie

  14. L'ingénierie lexicale ou la description d'un objet entre l'invention et ...

    African Journals Online (AJOL)

    rbr

    Analyser l'évolution historique d'une activité sociale permet de comprendre les lacunes .... semble des pratiques, manifestations ou traditions, et supports diffusant et ... métalinguistique se prête ainsi à une lecture thématique, organisée sur un ...

  15. Síndrome de Russel ou síndrome de Diencefálica de emagreciemento

    Directory of Open Access Journals (Sweden)

    Nelson Pires Ferreira

    1971-06-01

    Full Text Available Os autores relatam um caso de síndrome de Russel ou síndrome diencefálica do emagrecimento. Revisam a literatura disponível sobre o assunto e comentam a dificuldade do diagnóstico na fase inicial da doença.

  16. Ions and light

    CERN Document Server

    Bowers, Michael T

    2013-01-01

    Gas Phase Ion Chemistry, Volume 3: Ions and Light discusses how ions are formed by electron impact, ion-molecule reactions, or electrical discharge. This book discusses the use of light emitted by excited molecules to characterize either the chemistry that formed the excited ion, the structure of the excited ion, or both.Organized into 10 chapters, this volume begins with an overview of the extension of the classical flowing afterglow technique to include infrared and chemiluminescence and laser-induced fluorescence detection. This text then examines the experiments involving molecules that ar

  17. Qualidade de vida de cuidadores de crianças e adolescentes com sobrepeso ou obesidade

    Directory of Open Access Journals (Sweden)

    Tatiana Rocha Melo

    2011-04-01

    Full Text Available Este estudo avaliou a qualidade de vida relacionada à saúde (QVRS de cuidadores de crianças e adolescentes com sobrepeso e obesidade. Trezentos e sessenta cuidadores de crianças e adolescentes com idade entre 9 e 12 anos, com diagnóstico de sobrepeso (n=96; idade média=11,1 anos, obesidade (n=62; idade média de 10,9 anos e eutrofia (n=202; idade média de 10,7 anos, matriculadas em escolas públicas e particulares da cidade de Uberlândia (MG, foram convidados a responder o questionário The 36 item Short Form Questionnaire (SF-36. Os escores obtidos pelo questionário foram comparados segundo o índice de massa corpórea (IMC das crianças e adolescentes e não foram encontradas diferenças significativas entre os cuidadores de crianças e adolescentes com sobrepeso, obesidade e eutrofia.Logo, os cuidadores de crianças e adolescentes com sobrepeso ou obesidade não apresentam prejuízo na sua QVRS.

  18. Diversity of Soil Microbial Communities from an Iron Mining Area (Oued Zem, Morocco)

    Science.gov (United States)

    Mohamed, Nouri; Abdelmajid, Haddioui

    2017-03-01

    Microbial communities in the soil were collected from 20 samples of an iron mining area (Ait Ammar, Oued Zem, Morocco), and unaffected samples were analysed to identify the effects of metal concentrations on functional diversity (Biolog® EcoPlates), and structural diversity (polymerase chain reaction-denaturing gradient gel electrophoresis of 16S rDNA). Aliivibrio fischeri is mainly used for evaluating polluted soil. The functional diversity was assessed by using such indices as area under substrate utilisation curve, richness, Shannon- Weaver and evenness indices. The analysis of similarities and the non-metric multidimensional scaling analyses of DGGE profiles showed that metals in the soil do not have a significant influence on bacteria. Principal component analysis of Biolog data revealed the similarity in the metabolic profiles of mining samples. These results suggest that the direction and the distance from the iron mine tailings do not have significant effects on the metabolic and structural diversity of the soil bacterial population. The toxicity of metals in soils heavily contaminated with Fe and P did not affect the quantities of microbial populations and did not significantly change the microbial diversity of contaminated soils.

  19. A violência masculina é dirigida para Eva ou Maria?

    Directory of Open Access Journals (Sweden)

    Ceci Vilar Noronha

    Full Text Available Este trabalho analisa os diferenciais por gênero de mortes violentas e outras agressões ocorridas na Bahia. No país, ê crescente a importância dos agravos externos no conjunto das causas de óbito. Ademais, os atos violentos tendem a pressionar a demanda por atendimentos de emergência nos serviços de saúde. Os dados empíricos foram coligidos na imprensa escrita, cobrindo todos os homicídios, tentativas de homicídio e estupros noticiados em 1989. A violência policial despontou como responsável pela morte de uma alta proporção de jovens do sexo masculino. Em seguida, as desavenças entre indivíduos considerados marginais ou os assassinatos atribuídos à "queima-de-arquivo". Com relação às mulheres, a dimensão quantitativa dos crimes é menor, mais difusa e resultante das relações familiares. Os estudos revisados apontam para a generalização do domínio masculino sobre a mulher na interpretação das reações violentas. Fazer resistência à ideologia de gênero que inferioriza a mulher significa, simultaneamente, evitar agressões e homicídios - uma tarefa complexa para a sociedade brasileira.

  20. Vias bilíferas no tapir ou anta (Tapirus americanus

    Directory of Open Access Journals (Sweden)

    Maria Angélica Miglino

    1994-06-01

    Full Text Available Os autores estudaram as vias bilíferas do tapir ou anta (Tapirus americanus, após injeção do sistema excretor do fígado de 2 animais, machos e adultos, com látex Neoprene 650 corado, fixação das peças com solução aquosa de formol a 10% e dissecação. O ductus choledocus origina-se a partir da confluência do ramus principalis dexter e do sinister, sendo este animal desprovido de vesícula biliar. O ramus principalis dexter é formado pelos ramus ventralis lobi dextri, ramus medius lobi dextri, ramus dorsalis lobi dextri e ramus processi caudati, os quais se unem por diferentes modalidades. O ramus principalis sinister é formado pelos ramus medius lobi sinistri lateralis, ramus dorsalis lobi sinistri lateralis, ramus lobi quadrati, ramus ventralis lobi sinistri lateralis e ramus lobi sinistri medialis, com diferentes arranjos

  1. Work Analysis And Autonomy - Socialisme ou Barbarie's Concept of Revolutionary Work Research

    Directory of Open Access Journals (Sweden)

    Gabler, Andrea

    2008-12-01

    Full Text Available Cornelius Castoriadis hardly fits the stereotype of the isolated thinker, who develops theories in private, far away from the world. When reading his stimulating texts, we should have in mind that they were written in a specific political context, as part of Castoriadis' own revolutionary activism. Until the mid-1960s the French group "Socialisme ou Barbarie" (hereafter: "SouB"; "SB" is used hereafter with reference to their journal with the same name was Castoriadis' political background. His works from that period were the direct expression of the group's discussions and activities.The following article deals with an example of Castoriadis' political-theoretical collaboration with SouB. After a short view at the Marxist context at that time (1., follows the description of SouB's work analysis, its main concept, results and limitations (2., from which unfolds directly Castoriadis' theory (3.. By way of conclusion I shall show some implications for today's discussions about work (4..

  2. Psicologia Social ou Psicologia das Associações? A perspectiva latouriana de sociedade

    Directory of Open Access Journals (Sweden)

    Cordeiro, Mariana Prioli

    2010-01-01

    Full Text Available No presente artigo, buscamos discutir como a noção de social é concebida pela Teoria Ator-Rede (TAR, bem como as possíveis contribuições desta concepção para a psicologia social. Para a TAR, ao invés de tomarmos o social como um domínio ou como o tipo de material que compõe determinados fenômenos, devemos questionar o projeto de dar uma “explicação social” a algum estado de coisas e resgatar o significado original do termo – que, timologicamente, está mais próximo de associações do que de vínculos sociais. Pensar uma psicologia social que parta dessa perspectiva implica pensar em uma psicologia que considera que os não-humanos têm agência e produzem efeitos no mundo, modificando nossas ações e nossos processos de atribuição de sentido

  3. Rabia al Adawiyya ou l'exaltation de l'amour Divin

    Directory of Open Access Journals (Sweden)

    Dr Bakhta Abdelhay

    2004-06-01

    Full Text Available Nul ne pourrait parler de la mystique musulmane sans parler de Rabia al Adawiyya, cette ascète qui vécut toute sa vie cherchant son propre salut. Sa vie entière fut marquée par un dévouement inégalable à l'amour Divin. Notre intervention portera donc sur cette notion de l'amour Divin dans la poésie de Rabia qui, à travers chaque vers, nous emporte dans un monde euphorique ou l'amour de Dieu terrasse l'amour humain. Notre but est de voir comment l'option pour le mysticisme fut pour Rabia la voie pour parvenir à l'élévation religieuse qui réunit l'amour humain à l'amour Divin créant ainsi cette symbiose exaltante qu'est l'union de la créature à son créateur.

  4. Louis Massignon l'amour mystique ou l'extase dans l'abandon

    Directory of Open Access Journals (Sweden)

    Jacques Keryell

    2008-09-01

    Full Text Available Parler de Massignon et de son Amour de Dieu n'est pas chose aisée. En effet, si les mystiques musulmans des premiers siècles de l'hégire ont été les hérauts de cet Amour : Al-Hallâj, Râbia al-Adawiyya, Al-Niffâri, Ibn Arabi, Ansâri, Al-Ghazâli, l'Amour de Dieu comme tel, n'est pas au cœur du "ilm al kalâm", de la théologie musulmane traditionnelle. Pour Massignon, langue et spiritualité étaient intimement liées. Si je devais me placer dans une perspective musulmane, je dirais que Louis Massignon se situe dans la ligne de la "wahdat al shuhûd", celle de "l'unicité du témoignage" ou Dieu se témoigne Lui-même en son mystère dans le cœur du soufi.

  5. Disreflexia autonômica: uma emergência ou não?

    Directory of Open Access Journals (Sweden)

    Aurimar Antonio Demenech

    Full Text Available Trata-se de um estudo de caráter bibliográfico, envolvendo nossa antiga prática profissional, onde são descritos alguns problemas de disreflexia autonômica (DA. Esta é uma síndrome que ocorre em 85% dos pacientes com lesão medular ao nível da sexta vértebra torácica ou acima, que indica uma atividade reflexa anormal do sistema nervoso autônomo, de ocorrência altamente imprevisível e súbita, acarretando risco de vida para o paciente. Surge como resposta a estímulos que são inócuos a pessoas normais. São descritos quais os estímulos desencadeantes, bem como as formas de preveni-los e a assistência de enfermagem a ser prestada na iminência de uma crise.

  6. Escritores de blogs: interagindo com os leitores ou apenas ouvindo ecos?

    Directory of Open Access Journals (Sweden)

    Flavia Di Luccio

    Full Text Available Neste estudo, tivemos como objetivo investigar os impactos que a escrita digital e a tela do computador, como suporte textual, vêm tendo sobre escritores e leitores. As descrições que Roger Chartier faz dos três grandes cenários da escrita e da leitura que antecederam a era da escrita digital - aqueles marcados pelo rolo, pelo códice manuscrito e pelo livro impresso - serviram de contraponto para a avaliação desse novo tipo de escrita nesse novo suporte. Nossa análise se concentrou nesse quarto cenário e investigou uma de suas características inéditas: a de possibilitar a interação entre escritores e leitores nas telas de computadores conectados em rede. Para tanto, foi escolhido o espaço textual conhecido como weblog ou blog. O método de explicitação do discurso subjacente (MEDS foi usado para realizar uma pesquisa na qual foram entrevistados autores de blogs atualizados regularmente. Embora, em um primeiro momento, os participantes tenham afirmado que sua decisão de criar e manter seus blogs estava ligada, sobretudo, à possibilidade de interação com os leitores, a análise mais minuciosa de seus depoimentos revelou um quadro diferente. Os entrevistados raramente interagem com seus leitores.

  7. Hong-Ou-Mandel interference with two independent weak coherent states

    Science.gov (United States)

    Hua, Chen; Xue-Bi, An; Juan, Wu; Zhen-Qiang, Yin; Shuang, Wang; Wei, Chen; Zhen-Fu, Han

    2016-02-01

    Recently, the Hong-Ou-Mandel (HOM) interference between two independent weak coherent pulses (WCPs) has been paid much attention due to the measurement-device-independent (MDI) quantum key distribution (QKD). Using classical wave theory, articles reported before show that the visibility of this kind of HOM-type interference is ≤ 50%. In this work, we analyze this kind of interference using quantum optics, which reveals more details compared to the wave theory. Analyses confirm the maximum visibility of 50%. And we conclude that the maximum visibility of 50% comes from the two single-photon states in WCPs, without considering the noise. In the experiment, we successfully approach the visibility of 50% by using WCPs splitting from the single pico-second laser source and phase scanning. Since this kind of HOM interference is immune to slow phase fluctuations, both the realized and proposed experiment designs can provide stable ways of high-resolution optical distance detection. Project supported by the National Basic Research Program of China (Grants Nos. 2011CBA00200 and 2011CB921200), the National Natural Science Foundation of China (Grant Nos. 61201239, 61205118, 11304397, and 61475148) and the “Strategic Priority Research Program (B)” of the Chinese Academy of Sciences (Grant No. XDB01030100 and XDB01030300).

  8. Brewery wastewaters in photobiological hydrogen generation in presence of Rhodobacter sphaeroides O.U. 001

    Energy Technology Data Exchange (ETDEWEB)

    Seifert, K.; Waligorska, M.; Laniecki, M. [Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 60-780 Poznan (Poland)

    2010-05-15

    Rhodobacter sphaeroides O.U. 001 (concentration of inoculum-0.36 g dry wt/l) and brewery wastewaters were applied in photobiogeneration of hydrogen under illumination of 116 W/m{sup 2}. The best results were obtained with filtered wastewaters sterilized at 120 C for 20 min and maximal concentration of waste in medium equal 10% v/v. The main product in generated biogas was hydrogen (90%). After sterilization the amount of generated hydrogen was tripled (from 0.76 to 2.2 l H{sub 2}/l medium), whereas waste concentration of 10% v/v resulted in the best substrate yield (0.22 l H{sub 2}/l of waste). Under these conditions the amount of generated hydrogen was 2.24 l H{sub 2}/l medium and light conversion efficiency reached value of 1.7%. The modified Gompertz equations served in modeling of the kinetics of the studied process. (author)

  9. Salt wedge determination using electrical sounding method in the region of Oued Nador (Tipaza, Algeria)

    Science.gov (United States)

    Amine Bechkit, Mohamed; Benaïssa, Zahia; Ouadfeul, Sid Ali; Deghmoum, Feriel

    2017-04-01

    The marine intrusion of freshwater aquifers by salt water results in soil degradation due to their salinization. The present survey aims to study the position of the fresh water - salt water interface using electric sounding method in the region of Oued Nador (Tipaza, Algeria). It is important to know the position of this interface for the continuation of the aquifer exploitation. For this, we conducted, in this zone, seven electric soundings oriented north-west south-east, with Schlumberger electrodes configuration. The inversion of the apparent resistivity data via the IP2Win software allowed us to recover the true values of electrical resistivity. The exploitation of obtained data requires the implementation of a geo-electric section, and for the interpretation, the results of a standard electrical sounding, acquired near the study area, are used. The results of this geophysical study allowed us to locate the freshwater - salt water contact with resistivity values that can reach 50 ohm m for freshwater formation, and less than 10 ohm m for saturated saltwater formation. The depth of the contact between fresh water and salt water increases gradually from 38 m to 40 m near the coast, and this over a distance of 0 m to 500 m, and then rises abruptly beyond a distance of 500 m at the borehole N°3 where it reaches the maximum depth of 97 m. Key words: Electrical survey - Salt wedge - Electrical resistivity - Aquifer - Intrusion.

  10. Hydrogen production by Rhodobacter sphaeroides O.U.001 in a flat plate solar bioreactor

    Energy Technology Data Exchange (ETDEWEB)

    Eroglu, Inci; Tabanoglu, Altan; Eroglu, Ela [Department of Chemical Engineering, Middle East Technical University, 06531 Ankara (Turkey); Guenduez, Ufuk; Yuecel, Meral [Department of Biology, Middle East Technical University, 06531 Ankara (Turkey)

    2008-01-15

    Rhodobacter sphaeroides O.U.001 can produce hydrogen under anaerobic conditions and illumination. The objective of this study was to investigate the performance of an 8 l flat plate solar bioreactor operating in outdoor conditions. Different organic acids were used as carbon sources (malate, lactate and acetate) and olive mill waste water was used as a sole substrate source. The consumption and the production of the organic acids were determined by HPLC. The accumulation of by-products, such as poly-{beta}-hydroxybutyrate (PHB) and carotenoid, throughout the course of hydrogen production was determined. The hydrogen production rate was highest (0.01 l/l/h) when malate was the carbon source. Formate was observed as the fermentation end product. Acetate resulted in low hydrogen gas production and high PHB accumulation. When acetate was used as the carbon source, butyrate was produced as a result of fermentation. Promising amounts of PHB and caretenoid were accumulated during hydrogen production from diluted olive mill wastewater. (author)

  11. Critique de la "Natürlichkeitstheorie": "Natürlichkeit" ou fréquence?

    Directory of Open Access Journals (Sweden)

    Witold Mańczak

    2000-12-01

    Full Text Available Dans son livre souvent cité, Willi Mayerthaler (1981 a exposé une théorie à laquelle il a donné le nom de «MMT = morphologische Markiertheitstheorie». De même que par exemple Greenberg, Mayerthaler est persuadé que ce n' est pas la fréquence mais le caractère marqué ou non marqué des éléments linguistiques qui joue un rôle primordial dans la langue, comme en témoigne la citation suivante (p. 140: Frequenzargumente lassen sich unseres Erachtens in der morphologietheoretischen Diskussion ... kaum argumentativ einsetzen. Statistik ist ftir den Linguisten ... von unbestrittenem heuristischen Wert, spielt aber in der einmal nachkonstruierten, postheurischen Grammatik keine Rolle mehr, bzw. ist nicht mögliches Element der Strukturbeschreibung irgendwelcher grammatischer Regeln... Keinerlei Statistik erlaubt den Nachweis implikationaler Pattem, es scheinen aber gerade Implikationspattem zu sein, die erworben werden. Auch im Bereich der Sprachvariation ist Frequenz oder dgl... weitgehend ein Epiphänomen ohne explanative Funktion.

  12. Patrick Modiano: À l’écoute de la voix ou les affects sonores

    Directory of Open Access Journals (Sweden)

    María Vicenta Hernández Álvarez

    2009-11-01

    Full Text Available La voix précède les personnages dans les romans de Patrick Modiano. Des sensations auditives les annoncent et les révèlent. Les affects du narrateur sont convoqués par l’écoute à un travail de réévaluation ou de décryptage du passé.La voix, métonymie de l’être, est dans le miroir du récepteur, de l’écouteur (car les narrateurs de Modiano sont de grands observateurs de l’écoute, des psychanalystes en herbe affublée de nuances, de sensations revisitées et de significations redécouvertes. Le narrateur, personnage principal et première personne dans la grammaire du récit, réinterprète les voix du passé, de son passé, celles qui l’ont marqué, troublé.

  13. Estudo comparativo do ciclo evolutivo de Rhodnius neglectus alimentados em pombos ou camundongos

    Directory of Open Access Journals (Sweden)

    Liléia Diotaiuti

    1987-06-01

    Full Text Available Baseados no encontro de 77,2% de reação de precipitina positiva para soro antiave de R. neglectus capturados em palmeiras da periferia de Belo Horizonte, estudamos o ciclo evolutivo de uma colonia recém-estabelecida no laboratório alimentada com sangue de pombo ou camundongo, na expectativa de demonstrarmos maior adaptação deste triatomíneo ao sangue da ave. Para comparação, estudamos o ciclo evolutivo destes insetos numa colônia há muito mantida em insetário. Nossos resultados mostram um desenvolvimento mais rápido da colônia recém- estabelecida, assim como do lote de triatomíneos alimentado em camundongo. Esses achados sugerem menor potencial biológico para triatomíneos criados por longo tempo em insetário em comparação a novas colônias. Sendo as aves os principais habitantes das palmeiras, a aparente preferência alimentar por sangue de aves demonstrada pela reação de precipitina parece ser circunstancial e não seletiva na busca do sangue com o qual o triatomíneo obteria melhor desenvolvimento.

  14. Escritores de blogs: interagindo com os leitores ou apenas ouvindo ecos?

    Directory of Open Access Journals (Sweden)

    Flavia Di Luccio

    Full Text Available Neste estudo, tivemos como objetivo investigar os impactos que a escrita digital e a tela do computador, como suporte textual, vêm tendo sobre escritores e leitores. As descrições que Roger Chartier faz dos três grandes cenários da escrita e da leitura que antecederam a era da escrita digital - aqueles marcados pelo rolo, pelo códice manuscrito e pelo livro impresso - serviram de contraponto para a avaliação desse novo tipo de escrita nesse novo suporte. Nossa análise se concentrou nesse quarto cenário e investigou uma de suas características inéditas: a de possibilitar a interação entre escritores e leitores nas telas de computadores conectados em rede. Para tanto, foi escolhido o espaço textual conhecido como weblog ou blog. O método de explicitação do discurso subjacente (MEDS foi usado para realizar uma pesquisa na qual foram entrevistados autores de blogs atualizados regularmente. Embora, em um primeiro momento, os participantes tenham afirmado que sua decisão de criar e manter seus blogs estava ligada, sobretudo, à possibilidade de interação com os leitores, a análise mais minuciosa de seus depoimentos revelou um quadro diferente. Os entrevistados raramente interagem com seus leitores.

  15. Production and ion-ion cooling of highly charged ions in electron string ion source.

    Science.gov (United States)

    Donets, D E; Donets, E D; Donets, E E; Salnikov, V V; Shutov, V B; Syresin, E M

    2009-06-01

    The scheme of an internal injection of Au atoms into the working space of the "Krion-2" electron string ion source (ESIS) was applied and tested. In this scheme Au atoms are evaporated from the thin tungsten wire surface in vicinity of the source electron string. Ion beams with charge states up to Au51+ were produced. Ion-ion cooling with use of C and O coolant ions was studied. It allowed increasing of the Au51+ ion yield by a factor of 2. Ions of Kr up to charge state 28+ were also produced in the source. Electron strings were first formed with injection electron energy up to 6 keV. Methods to increase the ESIS ion output are discussed.

  16. Ion mobility spectrometry

    CERN Document Server

    Eiceman, GA

    2005-01-01

    Key Developments for Faster, More Precise Detection Capabilities Driven by the demand for the rapid and advanced detection of explosives, chemical and biological warfare agents, and narcotics, ion mobility spectrometry (IMS) undergone significant refinements in technology, computational capabilities, and understanding of the principles of gas phase ion chemistry and mobility. Beginning with a thorough discussion of the fundamental theories and physics of ion mobility, Ion Mobility Spectrometry, Second Edition describes the recent advances in instrumentation and newly

  17. Gas phase ion chemistry

    CERN Document Server

    Bowers, Michael T

    1979-01-01

    Gas Phase Ion Chemistry, Volume 2 covers the advances in gas phase ion chemistry. The book discusses the stabilities of positive ions from equilibrium gas-phase basicity measurements; the experimental methods used to determine molecular electron affinities, specifically photoelectron spectroscopy, photodetachment spectroscopy, charge transfer, and collisional ionization; and the gas-phase acidity scale. The text also describes the basis of the technique of chemical ionization mass spectrometry; the energetics and mechanisms of unimolecular reactions of positive ions; and the photodissociation

  18. Ion trap simulation tools.

    Energy Technology Data Exchange (ETDEWEB)

    Hamlet, Benjamin Roger

    2009-02-01

    Ion traps present a potential architecture for future quantum computers. These computers are of interest due to their increased power over classical computers stemming from the superposition of states and the resulting capability to simultaneously perform many computations. This paper describes a software application used to prepare and visualize simulations of trapping and maneuvering ions in ion traps.

  19. Fermentação da proteína de seis alimentos por microrganismos ruminais, incubados puros ou com monensina ou rumensin® Protein fermentation of six food souces by ruminal microorganisms, incubated alone or with monensin or rumensin®

    Directory of Open Access Journals (Sweden)

    Natália Guarino Souza Barbosa

    2001-07-01

    Full Text Available Avaliaram-se os efeitos da fermentação in vitro de seis alimentos: fubá de milho (FM, farelo de soja (FS, farelo de trigo (FT, sorgo (SO, glúten de milho (GM e uréia (UR, incubados puros ou com o antibiótico monensina, esse na forma pura para análise (Monensina ou comercial (Rumensin®. O experimento constituiu-se de 18 unidades experimentais [três alimentos energéticos ou protéicos × três tratamentos (controle, monensina ou rumensin × duas repetições], em que foram analisados os parâmetros ruminais: pH, produção de amônia (NH3, proteína bacteriana (PM, proteína solúvel (PS e degradabilidade da proteína. As incubações foram feitas por 96 horas, em que as amostras foram coletadas às zero, 24, 48, 72 e 96 horas de fermentação. A leitura do pH foi realizada por um potenciômetro, enquanto as análises de amônia, proteínas microbiana e solúvel foram analisadas por técnicas colorimétricas. Não houve variações significativas no pH ao longo das incubações (6,94 inicial e 7,03 final. Não houve diferença entre as duas fontes de ionóforo testadas, contudo houve efeitos de interação entre antibiótico e alimento. A maior produção de NH3 nos alimentos protéicos foi encontrada para a UR, seguida do FS e GM, sendo reduzida na presença do ionóforo. A PS foi semelhante para os alimentos protéicos, aumentada pelo uso do ionóforo, exceto para a uréia. A PM decresceu para a UR e o FS, porém aumentou para o GM, sem ocorrer efeito de ionóforo. Nos alimentos energéticos a PM foi semelhante para os três alimentos e os ionóforos apenas reduziram a PM do SO. A maior produção de NH3 nos alimentos energéticos, foi encontrada para o FT, seguida do FM e SO. A PS foi semelhante para os alimentos energéticos. Houve correlações significativas das concentrações de NH3 com o pH final e %PB dos alimentos.The in vitro fermentation of the following food sources were evaluated: corn meal (CM, soybean meal (SM, wheat

  20. Farelo de algodão em dietas com ou sem suplementação de enzimas para frango de corte

    National Research Council Canada - National Science Library

    Lídia Maria Brito de Miranda; Cláudia de Castro Goulart; Silvana Cavalcante Bastos Leite; Ana Sancha Malveira Batista; Raffaella Castro Lima

    2017-01-01

    .... Foram utilizados 350 pintos distribuídos em delineamento experimental inteiramente casualizado, em esquema fatorial 2 x 2 + 1 (2 níveis de substituição: 10 ou 20% x suplementação ou não com enzimas + dieta controle...

  1. Formas do vivo e no vivo: imitar e/ou reproduzir a vida

    Directory of Open Access Journals (Sweden)

    Anne Marcovich

    2008-03-01

    Full Text Available As questões relativas às formas e à morfologia adquiriram depois do século xviii uma posição central nas ciências e, particularmente, na biologia. Desde 1890, as formas surgiram na bioquímica a partir da noção de especificidade (fala-se da adequação entre moléculas como daquela entre uma chave e uma fechadura. As diferentes orientações na biologia (particularmente depois da revolução da biologia molecular, do desenvolvimento da biologia sistêmica, da biologia sintética e dos trabalhos claramente orientados para as escalas nanométricas produziram significações diferenciadas das noções de forma e de especificidade. As diferentes perspectivas, nas quais elas são utilizadas, principalmente, na questão das fronteiras entre vivo e não vivo, entre natureza e artifício, ou, ao contrário, nas quais elas são eliminadas, substituídas, por exemplo, pelas noções de informação e de código, poderiam fornecer a chave para compreender a epistemologia profunda da pesquisa nesses domínios e os "paradigmas" que congregam pesquisadores que trabalham originalmente em comunidades científicas distintas. As análises aqui propostas apóiam-se principalmente na idéia de invariabilidade dos conceitos e das idéias que, mais ou menos explicitamente, possam assemelhar-se a princípios organizadores das atividades científicas.Questions related to forms and morphology acquired a central position in the sciences after the xviii th century, particularly in biology. Since 1890, forms entered into biochemistry starting from the notion of specificity (fit among molecules is said to be like that of key and lock. Different orientations in biology (particularly after the molecular biology revolution and the development of systemic biology, synthetic biology and works clearly oriented to the nanometric scales have attributed different meanings to the notions of form and specificity. The different perspectives on the one hand, those in which

  2. Identité stricte ou partielle et identification dans les phrases à copule. Comment les identifier ?

    Directory of Open Access Journals (Sweden)

    Amary-Coudreau Valérie

    2014-07-01

    Full Text Available Le terme d’identité est utilisé dans de nombreux domaines et notre étude pose la question de ce que peut être une identité en langue et plus particulièrement dans le traitement des phrases à copule. En s’appuyant sur la classification proposé par Higgins (1973, on se propose de distinguer l’identité de la spécification et de l’identification à l’aide de différents outils concernant deux problématiques : qu’elle peut être la forme d’une identité pour une phrase à copule et quel type de définition peut-on lui donner ? Pour ce qui concerne la forme, les phrases données comme des identités et traitées par les logiciens et philosophes en termes de vrai ou faux ne correspondent pas à ce qu’on peut supposer être des identités en langue : par exemple, en français, une phrase comme « Cicéron est Tullius » n’est pas valide et doit comporter c’est à la place de est (comme d’ailleurs les phrases spécificationnelles et identificationnelles pour ne pas paraître artificielle. On peut trouver une justification à cela dans la dichotomie entre prédicationnelles et équatives proposée par Heycock & Kroch (1999. Les équatives regroupent la spécification, l’identification et l’identité, mais ces deux dernières sous-catégories ne sont pas clairement distinguées dans la plupart des travaux sur le sujet. Pour ce qui concerne les définitions, l’identité mathématique, d’une part, et sur la Théorie des Opérations Enonciatives (cf. Culioli & Desclès, 1981, parmi d’autres références, d’autre part, ne permettent pas de lever totalement le voile sur cette problématique. On pose donc une hypothèse où la forme et l’interprétation sont liées : l’identité se présente sous la forme d’une phrase en X c’est Y où les deux termes X et Y possèdent exactement la même structure interne, et par conséquent le même degré de référentialité. Ceci nous permet de d’envisager les caract

  3. The ammonoids from the Argiles de Teguentour of Oued Temertasset (early Late Tournaisian; Mouydir, Algeria

    Directory of Open Access Journals (Sweden)

    D. Korn

    2010-02-01

    Full Text Available The ammonoids from the Teguentour Shales (Tournaisian, Early Carboniferous of Oued Temertasset (Mouydir, Algeria are described monographically. The following new ammonoid taxa are introduced: Imitoceras dimidium n. sp., Imitoceras strictum n. sp., Triimitoceras tantulum n. sp., Acrocanites disparilis n. sp., Jdaidites cultellus n. sp., Pericyclus tortuosus n. sp., Pericyclus circulus n. sp., Pericyclus trochus n. sp., Pericyclus intercisus n. sp., Nodopericyclus n. gen., Nodopericyclus circumnodosus n. sp., Nodopericyclus deficerus n. sp., Ammonellipsites serus n. sp., Helicocyclus formosus n. sp., Helicocyclus inornatus n. sp., Helicocyclus laxaris n. sp., Ouaoufilalites creber n. sp., family Temertassetiidae n. fam., Temertassetia n. gen., Temertassetia temertassetensis n. sp., Temertassetia secunda n. sp., Temertassetia decorata n. sp., Temertassetia coarta n. sp., Jerania n. gen., Jerania jeranensis n. sp., Jerania sicilicula n. sp., Jerania pusillens n. sp., Jerania subvexa n. sp., Jerania persimilis n. sp., Kusinia n. gen., Kusinia falcifera n. sp., Bouhamedites insalahensis n. sp., Muensteroceras subparallelum n. sp., Muensteroceras multitudum n. sp., Follotites n. gen., Follotites folloti n. sp., Follotites stelus n. sp., Follotites flexus n. sp., family Rotopericyclidae n. fam., Eurites permutus n. sp., Eurites doliaris n. sp., Mouydiria n. gen., Mouydiria mouydirensis n. sp., Mouydiria scutula n. sp., Rotopericyclus kaufmanni n. sp., Rotopericyclus rathi n. sp., Rotopericyclus wendti n. sp., Rotopericyclus lubesederi n. sp., subfamily Dzhaprakoceratinae n. subfam., Dzhaprakoceras punctum n. sp., Dzhaprakoceras amplum n. sp., Dzhaprakoceras vergum n. sp., Dzhaprakoceras biconvexum n. sp., Progoniatitinae n. subfam., Progoniatites uncus n. sp., Progoniatites pilus n. sp., Progoniatites paenacutus n. sp., Progoniatites globulus n. sp., Habadraitinae n. subfam., Habadraites n. gen., Habadraites weyeri n. sp., Habadraites supralatus n. sp

  4. ALTAS HABILIDADES OU SUPERDOTAÇÃO: LEVANTAMENTO DOS ARTIGOS INDEXADOS NO SciELO

    Directory of Open Access Journals (Sweden)

    Ketilin Mayra Pedro

    2016-06-01

    Full Text Available A Declaração de Salamanca e a Política Nacional de Educação Especial são considerados os grandes marcos mundial e nacional, respectivamente, na área da inclusão. Estes documentos descrevem os estudantes que são considerados público alvo da educação especial, sendo que aqueles que apresentam altas habilidades ou superdotação estão contemplados nesta população. Diante da necessidade de pesquisas na área que proporcionem a consolidação e a produção de novos conhecimento, se faz necessário analisar as produções já existentes. O objetivo deste trabalho foi realizar uma pesquisa bibliográfica, na Scientific Eletronic Library Online, identificar as principais temáticas dos artigos, o ano, locais de publicação e principais autores. Encontramos 53 artigos científicos, sendo que “características”, “identificação”, “formação docente” e “esporte” foram as categorias temáticas com maior número de artigos. O ano de 2015 destacou-se com o maior número de produções, sendo que a Revista Brasileira de Educação Especial destaca-se como local de publicação.

  5. Produtividade de cultivares de roseira sobre diferentes porta-enxertos ou provenientes de estaquia.

    Directory of Open Access Journals (Sweden)

    Patricia Unger Cesar Pizetta

    2005-06-01

    Full Text Available Esta pesquisa objetivou avaliar a produtividade de roseiras ‘Tineke’ e ‘Versília’, enxertadas sobre diferentes porta-enxertos ou provenientes de estaquia. O estudo foi conduzido em Andradas (MG, durante o período de março de 2001 a fevereiro de 2002. O delineamento experimental foi inteiramente casualizado com dez tratamentos: os cultivares enxertados sobre nove portaenxertos (Rosa multiflora ‘Paulista’, R. multiflora ‘Japones’, R. multiflora ‘Iowa’, R. multiflora ‘Kopman´s’, R. indica x multiflora, R. indica ‘Mayor’, R. sp. ‘Natual Brier’, R. manetti, R. canina ‘Inermis’ e provenientes de estaquia, com quatro repetições, sendo cada parcela constituída por cinco plantas. Foi anotado o número de hastes florais colhidas por planta por mês. Tendo como parâmetro a produtividade, para a região de Andradas (MG, recomenda-se, como porta-enxertos para o cultivar ‘Tineke’ preferencialmente R. manetti, seguido de R. multiflora ‘Japones’, R. multiflora ‘Iowa’ e R. multiflora ‘Kopman’s’; para ‘Versília’, os porta-enxertos R. multiflora ‘Paulista’, R. multiflora ‘Japones’, R. multiflora ‘Iowa’, R. multiflora ‘Kopman’s’, R. indica ‘Mayor’, R. sp. ‘Natual Brier’ e R. manetti; não se recomendam os porta-enxertos R. canina ‘Inermis’ e R. indica x multiflora para ambos os cultivares, nem R. indica ‘Mayor’ para ‘Tineke’; podem-se plantar, para ambos os cultivares, mudas provenientes de estaquia.

  6. Análise técnica: sorte ou realidade?

    Directory of Open Access Journals (Sweden)

    Pedro A. C. Saffi

    2003-12-01

    Full Text Available Este trabalho busca testar a validade da hipótese de eficiência dos mercados no mercado futuro do índice Ibovespa através do uso das chamadas estratégias de análise técnica. São utilizados testes de habilidade preditiva para verificar a hipótese de superioridade destas regras de decisão como forma de investimento. Sua vantagem é considerar a possibilidade de data-snooping na escolha da melhor estratégia, permitindo identificar se a aparente capacidade preditiva destes modelos é realmente significativa ou mero produto do acaso. Os resultados indicam que as estratégias de análise técnica não são capazes de gerar retornos estatisticamente significativos quando os efeitos de data-snooping são levados em conta. Estes resultados estão de acordo com o previsto pela hipótese fraca de eficiência de mercado.The purpose of this paper is to test market efficiency by using the so-called ''technical analysis'' investment strategies. We apply predictive hability tests developed by White (2000 in order to measure whether these strategies are capable of producing excess returns relative to the buy-and-hold strategy. It considers the possibilty of data-snooping, allowing the detection of models whose seemingly good performance are in fact due only to chance. Our results indicate that technical analysis is not profitable and should not be used by investors, being in line with weak-form efficient market hypothesis predictions.

  7. Estilos motivacionais de professores: preferência por controle ou por autonomia

    Directory of Open Access Journals (Sweden)

    Amélia Carolina Terra Alves Machado

    Full Text Available A motivação é fundamental para o envolvimento dos estudantes na escola. Para a teoria da autodeterminação, o estilo motivacional do professor, que pode controlar ou promover a autonomia, contribui para fomentar a ocorrência de tipos qualitativamente diferenciados de motivação. Neste estudo, de natureza exploratória, foram analisadas as interações entre dois professores e seus alunos. A amostra foi composta de acordo com o desempenho de 39 professores na avaliação do estilo motivacional, mediante a aplicação de um instrumento de autorrelato, problemas na escola. Desse total, dois professores, um com estilo motivacional promotor de autonomia e outro com uma orientação para o controle, tiveram suas aulas observadas em sete sessões, com o objetivo de levantar dados para a elaboração de um protocolo que continha categorias de interações. Foram então realizadas outras sete sessões de observação. Os resultados indicaram que, apesar de terem sido encontradas diferenças entre os desempenhos na avaliação do estilo motivacional, os professores interagiram com seus alunos de modo preferencialmente controlador. No entanto, o professor que promovia a autonomia interagiu de modo menos controlador no gerenciamento do tempo destinado para a realização das atividades em classe quando comparado ao professor controlador, além de oferecer feedback informativo. As implicações educacionais dos resultados são analisadas.

  8. O sintoma ou o que o sujeito tem de mais real

    Directory of Open Access Journals (Sweden)

    Marcelo Ricardo Pereira

    2012-03-01

    Full Text Available O sintoma não é um sinal de uma doença, como habitualmente se pensa a partir da ordem médica, mas um fenômeno subjetivo constituído pela realização deformada do desejo. Ele é, diz Freud, uma pantomima do desejo: uma mescla de restrição e gozo. Por isso, há algo do sintoma que não cede à decifração e se mostra aderente à fixação; algo que “retorna a um tipo de autoerotismo difuso”. Lacan encontrou melhores chaves para escrever isso. O sintoma é aquilo que as pessoas têm de mais real; é, diz ele, a própria “natureza da realidade humana”. Nenhuma interpretação o erradica, pois ele é real. O real – sabemos – não pode ser reduzido à realidade concreta, mas é justamente o que a atropela. É a coisa sobre a qual não se tem como dizer ou aquilo que para o sujeito é expulso da realidade pela intervenção da palavra. E aqui, defendemos: essa coisa para o neurótico é a infância; essa que retorna desde seu inconsciente. A infância só existe falada pelo adulto psicanalisado, que quer em vão decifrá-la, fixando-se nela. Ela é o seu ponto real; e, por isso, seu sintoma. O infantil como sintoma: eis o que talvez o sujeito tenha de mais real.

  9. O mexilhão Perna perna no Brasil: nativo ou exótico?

    Directory of Open Access Journals (Sweden)

    B.S. Pierri

    2016-04-01

    Full Text Available A mitilicultura no Brasil se baseia no mexilhão Perna perna (Linnaeus, 1758, que é encontrado em todo o litoral brasileiro, sendo especialmente abundante do Espírito Santo a Santa Catarina. Nos últimos anos, foi lançada a hipótese de que P. perna seja uma espécie exótica no litoral brasileiro. A hipótese se baseia na análise da malacofauna presente em sítios arqueológicos. Todas as contestações levantadas não remetem à uma conclusão, pois precisam de estudos específicos, com metodologias claras, aliando arqueologia, ecologia e biologia molecular. O objetivo deste trabalho foi estudar a condição de nativo ou exótico do mexilhão Perna perna no Brasil, a partir de levantamento dos resultados em sítios arqueológicos, de técnicas moleculares e de datação de conchas com C14. A datação indicou que as amostras de Perna perna do sítio arqueológico Rio do Meio/Jurerê, Florianópolis/SC, têm idade de 720±30 e 780±30 anos. O cálculo do tempo de divergência indicou que a separação das populações brasileiras e africanas ocorreu por volta de 200 mil anos. Os resultados apontam a presença da espécie no território brasileiro muito antes do descobrimento do Brasil pelos portugueses no ano de 1500, indicando que P. perna é de fato uma espécie nativa.

  10. A maioria sempre tem razão: ou não

    Directory of Open Access Journals (Sweden)

    Nilson José Machado

    2005-12-01

    Full Text Available NESTE ARTIGO são examinados os contextos, os âmbitos, as circunstâncias em que o recurso à regra da maioria é um procedimento adequado, em contraposição a outros em que ele não faz sentido. A associação automática de tal regra ao funcionamento dos regimes democráticos é certamente indevida, uma vez que neles convivem harmoniosamente eleições e indicações. Também parece indevido recurso a tal regra em temas relativos à ciência, em situações que envolvem patente irreversibilidade, em questões de consciência ou de integridade pessoal. A temática é complexa e toda tentativa de fechamento de questão, ainda que sedutora, conduz a aporias do tipo sugerido no título do presente artigo.IN THIS ARTICLE, several contexts, scopes and circumstances in which the use of the majority rule seems to be a proper use, in opposition to others in which it makes no sense. The automatic association of majority rule to democratic political systems is certainly inappropriate, because these systems ordinarily aggregate both elections and appointments. The rule also seems improper when it involves questions of science, irreversibility, consciousness and personal integrity. It is a very complex thematic and an attempt in order to undervalue it may drive only to aporias, as suggested by the title of this article.

  11. Eletrocardiografia em onças-pardas (Puma concolor anestesiadas com sevoflurano ou isoflurano

    Directory of Open Access Journals (Sweden)

    A.R. Oliveira

    Full Text Available RESUMO O objetivo deste trabalho foi descrever os achados eletrocardiográficos de 11 onças- pardas (Puma concolor. Os animais foram sedados com 0,15mg/kg de detomidina associado a 5mg/kg de cetamina e mantidos anestesiados com sevoflurano (GSEVO, n=6 ou isoflurano (GISO, n=5. A frequência cardíaca foi de 95 ± 13bpm. As alterações observadas nos animais no GSEVO foram: atrial standtill com condução ventricular, episódios isolados de contração ventricular prematura, bloqueio atrioventricular de primeiro grau, diminuição da amplitude do complexo QRS, onda S profunda e aumento da amplitude da onda T. No grupo GISO, observou-se bloqueio de ramo direito do feixe de His, bloqueio atrioventricular de primeiro grau e aumento da amplitude da onda T. Arritmias não puderam ser associadas ao uso dos anestésicos inalatórios devido à não sensibilização do miocárdio às catecolaminas. Achados como o BAV de primeiro grau pode ter ocorrido devido ao uso de agonistas α-2 adrenérgicos. Este estudo aumentou o conhecimento sobre as alterações eletrocardiográficas em onças-pardas anestesiadas, entretanto mais estudos são necessários para correlacionar estes achados ao uso de agentes anestésicos.

  12. Analyse textuelle des discours: Niveaux ou plans d´analyse

    Directory of Open Access Journals (Sweden)

    Jean-Michel Adam

    2012-12-01

    Full Text Available L’article porte sur la théorie de l´Analyse Textuelle des Discours, à partir d´une reprisede la traduction brésilienne de La linguistique textuelle: introduction à l’analyse textuelle desdiscours (Cortez, 2008. L’ATD est pensée en fonction de trois observations préliminaires: lalinguistique textuelle est une des disciplines de l’analyse de discours, le texte est l’objet d’analysede l’ATD, et, dès qu’il y a texte, c’est-à-dire reconnaissance du fait qu’une suite d’énoncésforme un tout de communication, il y a effet de généricité, c’est-à-dire inscription de cette suited’énoncés dans une classe de discours. Le modèle théorique de l’ATD est éclairé par une reprisede son schéma 4, où sont représentés huit niveaux d’analyse. L´ATD est abordée sous l’angled’une double exigence – des raisons théoriques et des raisons méthodologiques et didactiquesqui conduisent à ces niveaux – et sont détaillées et illustrées les cinq plans ou niveaux d’analysetextuelle. Pour finir, des parties de l’oeuvre sont reprises et élargies, avec d’autres analyses où denouveaux aspcts théoriques sont détaillés.

  13. Por uma epistemologia do estranhamento, ou como interpretar em situações de limiaridade

    Directory of Open Access Journals (Sweden)

    Rosamaria Rocha

    2008-09-01

    Full Text Available Tomando como referência epistemológica efeitos provocados pela violência contemporânea, discursiva e midiatizada, o artigo problematiza lugares possíveis a serem ocupados pelas teorias da comunicação diante da violência como fato social demarcado por incessantes processos de simbolização. Propõe, neste sentido, a possibilidade de uma narrativa sobre a violência que toma por inspiração o princípio lyotardiano da anamnese, defendendo, igualmente, sua localização em uma linhagem teórica ancorada no pensamento crítico. Propõe, finalmente, identificar dinâmicas de consumo cultural que, no Brasil, sinalizam reapropriações de cenas de violência, seja para afirmá-la, seja para contestá-la ou contrapô-la. Palavras-chave: Violência; comunicação; consumo. Abstract Taking as an epistemological reference the effects of contemporary violence, both discursive and mediated, the article focuses on communication theories, considering among other facts the symbolic forms with which social violence is constructed. It postulates, in this direction, the possibilityof a narrative that takes for inspiration lyotard’s principle of anamnese, defending, equally, its localization in the theoretical framework of critical theory. Finally, intends to identify some dynamics of cultural consumption that, in Brazil, signal re-appropriations of violence scenes, either to affirm or contest it. Keywords: Violence; communication; consumption.

  14. [Development of metal ions analysis by ion chromatography].

    Science.gov (United States)

    Yu, Hong; Wang, Yuxin

    2007-05-01

    Analysis of metal ions by ion chromatography, including cation-exchange ion chromatography, anion-exchange ion chromatography and chelation ion chromatography, is reviewed. The cation-exchange ion chromatography is a main method for the determination of metal ions. Stationary phases in cation-exchange ion chromatography are strong acid cation exchanger (sulfonic) and weak acid cation exchanger (carboxylic). Alkali metal ions, alkaline earth metal ions, transition metal ions, rare earth metal ions, ammonium ions and amines can be analyzed by cation-exchange ion chromatography with a suitable detector. The anion-exchange ion chromatography is suitable for the separation and analysis of alkaline earth metal ions, transition metal ions and rare earth metal ions. The selectivity for analysis of metal ions with anion-exchange ion chromatography is good. Simultaneous determination of metal ions and inorganic anions can be achieved using anion-exchange ion chromatography. Chelation ion chromatography is suitable for the determination of trace metal ions in complex matrices. A total of 125 references are cited.

  15. Ion channels in asthma.

    Science.gov (United States)

    Valverde, Miguel A; Cantero-Recasens, Gerard; Garcia-Elias, Anna; Jung, Carole; Carreras-Sureda, Amado; Vicente, Rubén

    2011-09-23

    Ion channels are specialized transmembrane proteins that permit the passive flow of ions following their electrochemical gradients. In the airways, ion channels participate in the production of epithelium-based hydroelectrolytic secretions and in the control of intracellular Ca(2+) levels that will ultimately activate almost all lung cells, either resident or circulating. Thus, ion channels have been the center of many studies aiming to understand asthma pathophysiological mechanisms or to identify therapeutic targets for better control of the disease. In this minireview, we focus on molecular, genetic, and animal model studies associating ion channels with asthma.

  16. Superconducting microfabricated ion traps

    CERN Document Server

    Wang, Shannon X; Labaziewicz, Jaroslaw; Dauler, Eric; Berggren, Karl; Chuang, Isaac L

    2010-01-01

    We fabricate superconducting ion traps with niobium and niobium nitride and trap single 88Sr ions at cryogenic temperatures. The superconducting transition is verified and characterized by measuring the resistance and critical current using a 4-wire measurement on the trap structure, and observing change in the rf reflection. The lowest observed heating rate is 2.1(3) quanta/sec at 800 kHz at 6 K and shows no significant change across the superconducting transition, suggesting that anomalous heating is primarily caused by noise sources on the surface. This demonstration of superconducting ion traps opens up possibilities for integrating trapped ions and molecular ions with superconducting devices.

  17. Colonic microbiota alters host susceptibility to infectious colitis by modulating inflammation, redox status, and ion transporter gene expression.

    Science.gov (United States)

    Ghosh, S; Dai, C; Brown, K; Rajendiran, E; Makarenko, S; Baker, J; Ma, C; Halder, S; Montero, M; Ionescu, V A; Klegeris, A; Vallance, B A; Gibson, D L

    2011-07-01

    Individuals vary in their resistance to enteric infections. The role of the intestinal microbiota in altering susceptibility to enteric infection is relatively unknown. Previous studies have identified that C3H/HeOuJ mice suffer 100% mortality during Citrobacter rodentium-induced colitis, whereas C57BL/6 mice recover from infection. The basis for their differences in susceptibility is unclear and has been mainly attributed to differences in host genetics. This study investigated the role of the intestinal microbiota in altering susceptibility to C. rodentium-induced colitis. When the feces of C57BL/6 mice were gavaged into antibiotic treated C3H/HeOuJ mice, the C57BL/6 microflora led to a complete reversal in mortality patterns where 100% of the C3H/HeOuJ mice survived infection. This protection corresponded with reduced colonic pathology and less systemic pathogen load and was associated with increased inflammatory and redox responses with reduced epithelial cell death. C3H/HeOuJ mice are normally susceptible to infection-induced dehydration due to defective expression of colonic ion transporters such as Dra, CA IV, and CA I; expression of these genes was normalized when C3H/HeOuJ mice were colonized with the C57BL/6 microflora. Together, these data reveal that the colonic microbiota play a critical role in protecting against intestinal infection by inducing proinflammatory and prooxidant responses that control pathogen load as well as ion transporter gene expression previously shown to prevent fatal dehydration. Protection of mice from lethal colitis was associated with higher levels of bacteria from Bacteroidetes. This study reveals that the microbiota is sufficient to overcome inherent genetic susceptibility patterns in C3H/HeOuJ mice that cause mortality during C. rodentium infection.

  18. Application of neutron activation techniques and x-ray energy dispersion spectrometry, in analysis of metallic traces adsorbed by chelex-100 resin; Ativacao das tecnicas de ativacao neutronica e espectrometria por dispersao de onda e de energia de raios X, na analise de tracos metalicos adsorvidos pela resina chelex-100

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, Jair C.; Amaral, Angela M.; Magalhaes, Jesus C.; Pereira, Jose S.J.; Silva, Juliana B. da; Auler, Lucia M.L.A. [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), Belo Horizonte, MG (Brazil)]. E-mail: jcf@urano.cdtn.br

    2000-07-01

    In this work, the authors have investigated optimal conditions of adsorption for several ion metallic groups (cations of heavy metals and transition metals, oxyanions metallics and metalloids and cations of rare earths), as traces (ppb), withdrawn and in mixture of groups, by chelex-100 resin. The experiments have been developed by bath techniques in ammonium acetate tamponade solution 40 mM pH 5,52 content 0,5 g of chelex-100 resin. After magnetic agitation for two hours, resins were dried and submitted to X-ray energy dispersion spectrometry, x-ray fluorescence spectrometry and neutron activation analysis. The results have demonstrated that chelex-100 resin adsorb quantitatively transition element groups and rare earth groups in two cases (withdrawn and simultaneously adsorption)

  19. Crater formation by single ions, cluster ions and ion "showers"

    CERN Document Server

    Djurabekova, Flyura; Timko, Helga; Nordlund, Kai; Calatroni, Sergio; Taborelli, Mauro; Wuensch, Walter

    2011-01-01

    The various craters formed by giant objects, macroscopic collisions and nanoscale impacts exhibit an intriguing resemblance in shapes. At the same time, the arc plasma built up in the presence of sufficiently high electric fields at close look causes very similar damage on the surfaces. Although the plasma–wall interaction is far from a single heavy ion impact over dense metal surfaces or the one of a cluster ion, the craters seen on metal surfaces after a plasma discharge make it possible to link this event to the known mechanisms of the crater formations. During the plasma discharge in a high electric field the surface is subject to high fluxes (~1025 cm-2s-1) of ions with roughly equal energies typically of the order of a few keV. To simulate such a process it is possible to use a cloud of ions of the same energy. In the present work we follow the effect of such a flux of ions impinging the surface in the ‘‘shower’’ manner, to find the transition between the different mechanisms of crater formati...

  20. Microfabricated ion trap array

    Science.gov (United States)

    Blain, Matthew G.; Fleming, James G.

    2006-12-26

    A microfabricated ion trap array, comprising a plurality of ion traps having an inner radius of order one micron, can be fabricated using surface micromachining techniques and materials known to the integrated circuits manufacturing and microelectromechanical systems industries. Micromachining methods enable batch fabrication, reduced manufacturing costs, dimensional and positional precision, and monolithic integration of massive arrays of ion traps with microscale ion generation and detection devices. Massive arraying enables the microscale ion traps to retain the resolution, sensitivity, and mass range advantages necessary for high chemical selectivity. The reduced electrode voltage enables integration of the microfabricated ion trap array with on-chip circuit-based rf operation and detection electronics (i.e., cell phone electronics). Therefore, the full performance advantages of the microfabricated ion trap array can be realized in truly field portable, handheld microanalysis systems.

  1. Ion sources for heavy ion fusion (invited)

    Science.gov (United States)

    Yu, Simon S.; Eylon, S.; Chupp, W.; Henestroza, E.; Lidia, S.; Peters, C.; Reginato, L.; Tauschwitz, A.; Grote, D.; Deadrick, F.

    1996-03-01

    The development of ion sources for heavy ion fusion will be reported with particular emphasis on a recently built 2 MV injector. The new injector is based on an electrostatic quadrupole configuration, and has produced pulsed K+ ions of 950 mA peak from a 6.7 in. curved alumino silicate source. The ion beam has reached 2.3 MV with an energy flatness of ±0.2% over 1 μs. The measured normalized edge emittance of less than 1 π mm mrad is close to the source temperature limit. The design, construction, performance, and comparisons with three-dimensional particle-in-cell simulations will be described.

  2. Indochinamon ou (Crustacea: Potamidae) as a new second intermediate host for Paragonimus harinasutai in Luang Prabang Province, Lao PDR.

    Science.gov (United States)

    Sohn, Woon-Mok; Ryu, Jae-Sook; Min, Duk-Young; Song, Hyun-Ouk; Rim, Han-Jong; Vonghachack, Youthanavanh; Bouakhasith, Daluny; Banouvong, Virasack

    2009-03-01

    Paragonimus harinasutai metacercariae were found in a species of freshwater crab, Indochinamon ou, collected in a small stream of Namback District, Luang Prabang Province, Lao PDR. Adult flukes were recovered after experimental infection of the metacercariae to dogs. Metacercariae were round or slightly elliptical, 0.666 x 0.626 mm in average size, and had a thin cyst wall of about 20 microm in thickness, a black excretory bladder, convoluted ceca, and some pinkish materials in the body. Adults were somewhat elongated, 95.2 x 36.5 mm in average size, covered with single-tipped tegumental spines, had a smaller oral sucker than the ventral sucker, a moderately branched ovary, and 5-6 lobulated testes. Eggs were ovoid and bilaterally symmetrical in shape, 79 x 45 microm in average size, and had a uniformly thickened shell. By the present study, it has been confirmed that I. ou is a new second intermediate host for P. harinasutai.

  3. A AUTO-ESTIMA EM ADOLESCENTES COM E SEM FISSURAS DE LÁBIO E/OU DE PALATO

    Directory of Open Access Journals (Sweden)

    Andrade Denise de

    2001-01-01

    Full Text Available O auto-conceito é um determinante importante da auto-estima, entre homens e mulheres, isto nos fez refletir sobre o processo de reabilitação das pessoas portadoras de malformação. Utilizamos para mensurar o nível de auto-estima a escala de Janis e Field. Entrevistou-se 608 adolescentes sendo 235 com e 373 sem fissuras de lábio e/ou de palato, entre idades de 17 a 20 anos e de ambos o sexos. Analisando os níveis de auto-estima concluímos que o grupo de adolescentes com fissuras se comporta de forma diferente do grupo sem fissura, ou seja, os portadores de fissuras exibem menores escores de auto-estima.

  4. L’ambulantage : Représentations du commerce ambulant ou informel et métropolisation

    OpenAIRE

    MONNET, Jérôme

    2006-01-01

    Les représentations sociales font du commerce dit ambulant, informel ou de rue un ensemble flou d’activités liées à l’illégalité, à l’archaïsme et au sous-développement. En première partie, une cybergéographie de ces représentations présente les trois identifications dominantes de ce type de commerce et différencie des approches selon que l’on s’exprime en anglais ou en français et en espagnol. Cependant, elles ont en commun de marginaliser le commerce ambulant, et en particulier de ne pas co...

  5. Em busca de uma ontologia do processo comunicativo. Ou: encruzilhadas de um campo científico

    Directory of Open Access Journals (Sweden)

    Gilson Soares Raslan Filho

    2013-12-01

    Full Text Available O campo científico da comunicação vive uma verdadeira encruzilhada: ou se perde no empirismo do estudo dos media; ou, numa recusa a tal empirismo, se lança numa busca teórica voraz, o que ameaça, por vastidão e frouxidão, seu estatuto científico, inclusive por colocar em suspenso a cientificidade dos estudos realizados no campo. Este ensaio identifica essa encruzilhada como duas faces de uma mesma moeda. Para superá-la, propõe a distinção entre a comunicação como problema e a problemática do campo específico da Comunicação, o que se realiza como uma tarefa de construção de uma ontologia do processo comunicacional.

  6. Implementation of Enhanced Attenuation at the DOE Mound Site OU-1 Landfill: Accelerating Progress and Reducing Costs

    Energy Technology Data Exchange (ETDEWEB)

    Hooten, Gwendolyn [U.S. Department of Energy, Office of Legacy Management; Cato, Rebecca [Navarro Research and Engineering; Looney, Brian [Savannah River National Laboratory, Aiken, SC

    2016-03-06

    At the US Department of Energy (DOE), Office of Legacy Management, Mound, Ohio, Site, chlorinated organic contaminants (cVOCs) originating from the former solid-waste landfill have impacted groundwater in Operable Unit 1 (OU-1). The baseline groundwater remedy was groundwater pump and treat (P&T). Since the source materials have been removed from the landfill, the Mound core team, which consists of DOE, US Environmental Protection Agency (US EPA), Ohio EPA, and other stakeholders, is assessing the feasibility of switching from the active P&T remedy to a passive attenuation-based remedy. Toward this end, an enhanced attenuation (EA) strategy based on the creation of structured geochemical zones was developed. This EA strategy addresses the residual areas of elevated cVOCs in soil and groundwater while minimizing the rebound of groundwater concentrations above regulatory targets (e.g., maximum contaminant levels [MCLs]) and avoiding plume expansion while the P&T system is turned off. The EA strategy has improved confidence and reduced risk on the OU-1 groundwater transition path to monitored natural attenuation (MNA). To better evaluate the EA strategy, DOE is conducting a field demonstration to evaluate the use of edible oils to enhance the natural attenuation processes. The field demonstration is designed to determine whether structured geochemical zones can be established that expedite the attenuation of cVOCs in the OU-1 groundwater. The EA approach at OU-1 was designed based on “structured geochemical zones” and relies on groundwater flow through a succession of anaerobic and aerobic zones. The anaerobic zones stimulate relatively rapid degradation of the original solvent source compounds (e.g., cVOCs such as tetrachloroethene [PCE] and trichloroethene [TCE]). The surrounding aerobic areas encourage relatively rapid degradation of daughter products (such as dichloroethene [DCE] and vinyl chloride [VC]) as well as enhanced cometabolism of TCE resulting from

  7. Tristeza/depressão na mulher: uma abordagem no período gestacional e/ou puerperal

    Directory of Open Access Journals (Sweden)

    Maria Isabel Ruiz Beretta

    2008-12-01

    Full Text Available Na gestação e puerpério, a mulher e sua família passam por uma série de mudanças que podem predispor ou mesmo intensificar a tristeza ou a depressão pós-parto. Este estudo identificou e comparou as repercussões destes quadros depressivos em gestantes/puérperas de baixo risco com as de alto risco. A pesquisa é qualitativa, descritiva, exploratória, do tipo estudo de caso. Este estudo foi realizado durante os meses de maio a novembro de 2006, no Ambulatório de Alto Risco e em uma Unidade Básica de Saúde da cidade de São Carlos/SP e, no domicílio das participantes. Para a coleta de dados utilizou-se dois roteiros de entrevista e escala de Beck. Foram entrevistadas oito gestantes. Os resultados demonstraram que o apoio do companheiro e familiares nessa fase da vida é extremamente importante, e a tristeza e/ou depressão pós-parto se instala ou se agrava quando estes aspectos não estão fortalecidos. As gestantes de baixo risco são mais vulneráveis por apresentarem dificuldades de adaptação ao papel materno e situações sócio-econômicas e familiares mais instáveis, o que nos instiga a refletir no papel das Unidades de Atenção Básica, em especial dos profissionais de enfermagem na identificação precoce, acompanhamento e encaminhamento dos casos de depressão.

  8. Water quality assessment of highly polluted rivers in a semi-arid Mediterranean zone Oued Fez and Sebou River (Morocco)

    OpenAIRE

    2014-01-01

    Oued Fez (one of the Sebou River tributaries - Morocco) allowed us to study and quantify the effect of the lack of wastewater treatment on surface water quality in semi-arid hydrological context. The analysis is based on field data collected from June 2009 to December 2011. Concentration and load patterns of nitrogen, phosphorus and chromium (used in the processing of leather) are compared in stable hydrological conditions during low flow and high flow periods in an eight-location sampling ne...

  9. Estudo da incidência de vaginose bacteriana em parturientes pré-termo ou gestantes com amniorrexe prematura

    Directory of Open Access Journals (Sweden)

    Raquel G. A. Torres

    2008-01-01

    Full Text Available Objetivos: relacionar a incidência de vaginose bacteriana entre parturientes com diagnóstico de trabalho de parto prematuro ou gestantes com amniorexe prematura em Sorocaba/SP. Metodologia: estudamos, de setembro/2003 a junho/2004, 30 pacientes internadas com diagnóstico clínico de trabalho de parto prematuro e/ou amniorexe prematura com idade gestacional inferior a 37 semanas. Como grupo controle tivemos 30 gestantes internadas para tratamento de outras intercorrências clínicas e/ou obstétricas, pareadas com o grupo de estudo pela idade cronológica e idade gestacional. A vaginose bacteriana foi diagnosticada pelo pH vaginal superior a 4.5, liberação de odor de “peixe podre” ao adicionar KOH (10% ao conteúdo vaginal, presença de “clue-cell” nesse material, e a caracterização de esfregaço sugestivo de vaginose bacteriana pelo método de Gram. Resultados: a vaginose bacteriana foi encontrada em 10.0% das pacientes do grupo de estudo e em 13.3% das pacientes do grupo controle. Encontramos também a presença de processos infecciosos vaginais, especialmente causados por leveduras, ambos achados não apresentaram significância estatística. Conclusão: a vaginose bacteriana não se associou de maneira significante com a ocorrência de trabalho de parto prematuro e/ou amniorexe prematura. Trabalho subsidiado por bolsa PIBIC-CNPq.

  10. A crise energética argentina: fonte de conflito ou oportunidade de cooperação?

    Directory of Open Access Journals (Sweden)

    Marcos Paulo de Araujo Ribeiro

    2010-10-01

    Full Text Available Recentemente a crise enérgica na Argentina ganhou repercussão mundial.  Nesse sentido o presente artigo busca analisar essa situação e as implicações que ela terá no cenário regional e mundial, em termos de possibilitar a cooperação ou gerar conflito.

  11. Market memory and fat tail consequences in option pricing on the expOU stochastic volatility model

    CERN Document Server

    Perello, J

    2006-01-01

    The expOU stochastic volatility model is capable of reproducing fairly well most important statistical properties of financial markets daily data. Among them, the presence of multiple time scales in the volatility autocorrelation is perhaps the most relevant which makes appear fat tails in the return distributions. This paper wants to go further on with the expOU model we have studied in Ref. 1 by exploring an aspect of practical interest. Having as a benchmark the parameters estimated from the Dow Jones daily data, we want to compute the price for the European option. This is actually done by Monte Carlo, running a large number of simulations. Our main interest is to "see" the effects of a long-range market memory from our expOU model in its subsequent European call option. We pay attention to the effects of the existence of a broad range of time scales in the volatility. We find that a richer set of time scales brings to a higher price of the option. This appears in clear contrast to the presence of memory ...

  12. Pacientes com desordem de consciência: respostas vitais, faciais e musculares frente música ou mensagem

    Directory of Open Access Journals (Sweden)

    Ana Claudia Giesbrecht Puggina

    2015-02-01

    Full Text Available Objetivos: comparar sinais vitais, expressão facial e sinais eletroneurográfi cos basais com medidas durante os estímulos música, mensagem ou “silêncio” em pacientes em coma, estado vegetativo ou sedado e relacionar a pontuação da Escala de Resultado de Glasgow com a intervenção realizada. Método: ensaio Clínico Controlado Transversal Unicego para o pesquisador. A alocação foi aleatória nos três grupos (experimental música, experimental mensagem ou controle. Foram realizadas duas avaliações (sessões com intervalo de 40 minutos no mesmo dia. Resultados: a maioria dos 76 pacientes eram homens, entre 18 e 36 anos e internados por trauma. Encontraram-se alterações estatisticamente signifi cantes nas variáveis temperatura, expressão facial, eletroneurografi a e Escala de Resultado de Glasgow; alterações mais frequentes na sessão 2, nos pacientes em coma e estado vegetativo, no músculo frontal e no grupo experimental. Conclusões: a expressão facial e a eletroneurografi a parecem ser variáveis mais confi áveis do que os sinais vitais para mensurar consciência.

  13. Pacientes com desordem de consciência: respostas vitais, faciais e musculares frente música ou mensagem

    Directory of Open Access Journals (Sweden)

    Ana Claudia Giesbrecht Puggina

    Full Text Available Objetivos: comparar sinais vitais, expressão facial e sinais eletroneurográfi cos basais com medidas durante os estímulos música, mensagem ou “silêncio” em pacientes em coma, estado vegetativo ou sedado e relacionar a pontuação da Escala de Resultado de Glasgow com a intervenção realizada. Método: ensaio Clínico Controlado Transversal Unicego para o pesquisador. A alocação foi aleatória nos três grupos (experimental música, experimental mensagem ou controle. Foram realizadas duas avaliações (sessões com intervalo de 40 minutos no mesmo dia. Resultados: a maioria dos 76 pacientes eram homens, entre 18 e 36 anos e internados por trauma. Encontraram-se alterações estatisticamente signifi cantes nas variáveis temperatura, expressão facial, eletroneurografi a e Escala de Resultado de Glasgow; alterações mais frequentes na sessão 2, nos pacientes em coma e estado vegetativo, no músculo frontal e no grupo experimental. Conclusões: a expressão facial e a eletroneurografi a parecem ser variáveis mais confi áveis do que os sinais vitais para mensurar consciência.

  14. Market memory and fat tail consequences in option pricing on the expOU stochastic volatility model

    Science.gov (United States)

    Perelló, Josep

    2007-08-01

    The expOU stochastic volatility model is capable of reproducing fairly well most important statistical properties of financial markets daily data. Among them, the presence of multiple time scales in the volatility autocorrelation is perhaps the most relevant which makes appear fat tails in the return distributions. This paper wants to go further on with the expOU model we have studied in Ref. [J. Masoliver, J. Perelló, Quant. Finance 6 (2006) 423] by exploring an aspect of practical interest. Having as a benchmark the parameters estimated from the Dow Jones daily data, we want to compute the price for the European option. This is actually done by Monte Carlo, running a large number of simulations. Our main interest is to “see” the effects of a long-range market memory from our expOU model in its subsequent European call option. We pay attention to the effects of the existence of a broad range of time scales in the volatility. We find that a richer set of time scales brings the price of the option higher. This appears in clear contrast to the presence of memory in the price itself which makes the price of the option cheaper.

  15. Violência na teoria psicanalítica: ruptura ou modalidade de laço social?

    Directory of Open Access Journals (Sweden)

    Tania Coelho dos Santos

    2006-12-01

    Full Text Available Haverá uma teoria psicanalítica da violência? Basta associar aviolência à pulsão de morte para explicar o crescimento destefenômeno no laço social contemporâneo? Se nos baseamos na teorialacaniana dos discursos, a violência é um sintoma ou é a rupturado laço social? O crescimento desse fenômeno deve ser analisadoa partir dos efeitos do objeto “a” em posição de ideal de nossacivilização ou como o efeito da abolição do Real como impossívelque o discurso do capitalismo promove? Essas hipóteses sãoexcludentes ou devemos articular uma à outra? Nossa reflexãoressalta os efeitos subjetivos da disjunção entre os elementos emjogo na estrutura dos discursos, verdadeira causa de fenômenoscontemporâneos como a violência.

  16. A violência masculina é dirigida para Eva ou Maria?

    Directory of Open Access Journals (Sweden)

    Ceci Vilar Noronha

    1991-06-01

    Full Text Available Este trabalho analisa os diferenciais por gênero de mortes violentas e outras agressões ocorridas na Bahia. No país, ê crescente a importância dos agravos externos no conjunto das causas de óbito. Ademais, os atos violentos tendem a pressionar a demanda por atendimentos de emergência nos serviços de saúde. Os dados empíricos foram coligidos na imprensa escrita, cobrindo todos os homicídios, tentativas de homicídio e estupros noticiados em 1989. A violência policial despontou como responsável pela morte de uma alta proporção de jovens do sexo masculino. Em seguida, as desavenças entre indivíduos considerados marginais ou os assassinatos atribuídos à "queima-de-arquivo". Com relação às mulheres, a dimensão quantitativa dos crimes é menor, mais difusa e resultante das relações familiares. Os estudos revisados apontam para a generalização do domínio masculino sobre a mulher na interpretação das reações violentas. Fazer resistência à ideologia de gênero que inferioriza a mulher significa, simultaneamente, evitar agressões e homicídios - uma tarefa complexa para a sociedade brasileira.This paper analyses the different categories of violent death and other injuries occurred in Bahia. In Brazil, traffic acidents, homicides and suicides correspond to the third most common cause of death. Besides, violent acts tend to increase the emergency health services demand. The data were collected from the written press covering all the homicides, grave injuries and notified rapes during 1989. Police violence appeared as responsible for the death of a high proportion (24% of young males, followed by the disagreement between criminals (18.6%. In relation to females, the quantitative dimension of crimes are lower, more diffused and registered in the family environment. The data point to the importance of male domination in the interpretation of those domestic violent acts. Resisting the ideology of women's inferiority means

  17. La mondiaterranée. Ou la méditerranéisation du monde.

    Directory of Open Access Journals (Sweden)

    Hervé Bonnet

    2010-11-01

    Full Text Available Toutes nos boussoles indiquent le Nord. D’ailleurs, de quelqu’un qui a « perdu la raison » ne dit-on pas qu’il a « perdu la boussole » ou le nord ? L’identification de la rationalité et de ce point cardinal n’est pas innocente. Mais s’il y a du Nord, déterminé, reconnaissable, identifiable en tant que tel, cela ne signifie t-il pas que nous évoluons dans une dimension géographique qui, loin d’être ordonnée à un espace neutre et homogène, relève bien plutôt d’une spatialité différenciée toute empreinte d’hétérogénéités locales ? Et si, comme le veut une des maximes de la tradition philosophique, « toute détermination est négation », ne devrions nous pas alors nous questionner, nous, peuples du Nord, quant à l’essence de ce Sud par rapport auquel nous nous déterminons en nous y opposant, fût-ce sous couleurs de non opposition ? En réalité, le sud est véritablement notre « nord » au sens où, culturellement et intellectuellement, le mouvement général d’occidentalisation du monde que certains ont pu reconnaître et penser sous le vocable de « mondialatinisation » implique un phagocytage mondial par le Sud. Mais la question se pose de savoir de quel Sud s’agit-il ? Nous tâcherons de montrer que ce processus historique et historial du déploiement de l’empire du Sud est ordonné et opéré par cet espace matriciel à bien des égards au regard de l’occident que constitue la Méditerranée. Nous verrons en quoi la Méditerranée, appréhendée dans sa dimension propre, c'est-à-dire par delà sa stricte restriction à une aire géographique, peut être pensée comme l’orient de l’histoire du monde et la source des possibilités de l’Avenir de l’humanité.

  18. Violência: pobreza ou fraqueza institucional? Violence: poverty or institutional failure?

    Directory of Open Access Journals (Sweden)

    Alba Zaluar

    1994-01-01

    Full Text Available Os autores fazem uma revisão das estatísticas de mortalidade do Ministério da Saúde por causas externas no período de 1981 a 1989, para o qual encontram-se disponíveis dados nacionais. Examinam seu comportamento nas diferentes Unidades da Federação, áreas metropolitanas e capitais, com ênfase nos óbitos por homicídios. Confrontam esses dados com aqueles da distribuição da pobreza no país e dos fluxos migratórios. Concluem pela inexistência de qualquer associação entre as taxas de mortalidade por homicídios e pobreza ou migração. Discutem que, se a associação pode ser evidenciada nas contravenções e nos crimes contra o patrimônio, não há qualquer sustentação para sua associação nos crimes contra a vida. Acentuam o papel do crime organizado, bem como do tráfico de drogas e de armas, como fator predominante na estruturação da criminalidade metropolitana, particularmente quando associado a uma política exclusivamente repressiva de combate às drogas e a escolhas políticas e institucionais inadequadas para o enfrentamento da pobreza urbana.The authors review mortality data by external causes from the Brazilian Ministry of Health from 1981 to 1989, a period in which national mortality statistics are available. Data from the various States, Metropolitan Areas, and State capitals are examined, particularly on homicide deaths. Comparisons are made with the distribution of poverty and migration rates. No association is found between these factors and homicide death rates. If relationships can be established with crimes against property there is no proof that either poverty or migratory movements may be related to crimes against life. The authors stress the role of organized crime and drugs and arms traffic as fundamental factors in structuring metropolitan criminality. This role is particularly accentuated when the fight against drugs is conducted in an exclusively repressive way and incorrect institutional and

  19. Ortodontia como atividade de meio ou resultado? Orthodontics as a support or core activity?

    Directory of Open Access Journals (Sweden)

    Erivaldo Ferreira Lopes

    2008-12-01

    Full Text Available Este trabalho apresenta a Ortodontia como atividade de meio, abordando as obrigações profissionais e as formas de se evitar e de se defender de ações judiciais. A grande parte dos litígios entre pacientes e ortodontistas se dá pelo fato equivocado, que ainda perdura, de que muitos juristas consideram a Ortodontia uma especialidade de fim, quando, na verdade, sua prática está sujeita a fatores que a caracterizam como atividade de meio. A Ortodontia deve ser, portanto, considerada uma obrigação de meio, onde o profissional tem o dever de utilizar todos os meios possíveis para atingir as expectativas do paciente, sem, entretanto, ter a obrigação de atingir o resultado idealizado. O ortodontista deve ser responsabilizado somente quando incorrer em imprudência, negligência, imperícia ou em caso de propaganda enganosa. Para evitar litígios, o ortodontista deve ter uma boa conduta profissional, registrando e mantendo arquivadas todas as etapas do tratamento, efetuando diagnósticos diferenciados, baseados nas características individuais, e escolhendo e conduzindo adequadamente o plano de tratamento.This study presents Orthodontics as a support activity, approaching professional obligations and ways to avoid and defend against legal action. A considerable part of litigation between patients and orthodontists results from the mistaken fact, which still persists, that many scholars regard Orthodontics as a core activity. In reality, its practice is subjected to factors that characterize it as a support activity. Orthodontics must be, therefore, regarded as a support obligation, whereupon the professional has the obligation to make use of all means possible to meet the patient's expectations - without, however, having the obligation to achieve the idealized result. The orthodontist must be made responsible only upon acts of imprudence, negligence, malpractice, or in the case of false advertising. In order to avoid litigation

  20. Estudo comparativo do ciclo evolutivo de Rhodnius neglectus alimentados em pombos ou camundongos

    Directory of Open Access Journals (Sweden)

    Liléia Diotaiuti

    1987-06-01

    Full Text Available Baseados no encontro de 77,2% de reação de precipitina positiva para soro antiave de R. neglectus capturados em palmeiras da periferia de Belo Horizonte, estudamos o ciclo evolutivo de uma colonia recém-estabelecida no laboratório alimentada com sangue de pombo ou camundongo, na expectativa de demonstrarmos maior adaptação deste triatomíneo ao sangue da ave. Para comparação, estudamos o ciclo evolutivo destes insetos numa colônia há muito mantida em insetário. Nossos resultados mostram um desenvolvimento mais rápido da colônia recém- estabelecida, assim como do lote de triatomíneos alimentado em camundongo. Esses achados sugerem menor potencial biológico para triatomíneos criados por longo tempo em insetário em comparação a novas colônias. Sendo as aves os principais habitantes das palmeiras, a aparente preferência alimentar por sangue de aves demonstrada pela reação de precipitina parece ser circunstancial e não seletiva na busca do sangue com o qual o triatomíneo obteria melhor desenvolvimento.Feeding pattems of R. neglectus collected in palm trees around Belo Horizonte (Minas Gerais, Brazil were investigated. Precipitin tests showed 77.2% of avian blood. In view of these results, a new colony of R. neglectus established in the laboratory was fed regularly on pigeons or mice, in order to verify a possible better adaptation of this insect to the avian blood. As a control group a colony of R neglectus which has been maintained for several years in the laboratory was also observed. The results show a better development of the “new" colony in comparison with the old one, and of those bugs nourished with mice blood. Such findings suggest a poorer biological potential for triatomines maintained for long time in artificial conditions, in comparison with those living in the natural environment. As birds are the main vertebrate inhabitants of palm trees (the natural ecotope of R neglectus, the apparent feeding preference of

  1. Tolérance et neutralité: incompatibles ou complémentaires?

    Directory of Open Access Journals (Sweden)

    Marc Rüegger

    2009-06-01

    Full Text Available La tolérance et la neutralité sont habituellement considérées comme des réponses interchangeables ou du moins complémentaires à des situations de conflit et de désaccord moral. Malgré cette association traditionnelle, plusieurs auteurs ont récemment contesté la complémentarité, voire même la compatibilité, de ces deux notions. Cet article examine tout d’abord deux arguments qui visent à établir l’incompatibilité de la tolérance et de la neutralité. Il montre ensuite que si ces arguments ne sont pas probants, en ce sens qu’ils ne parviennent pas à montrer l’impossibilité d’une conciliation entre tolérance et neutralité, ils mettent néanmoins en évidence deux difficultés qui se dressent sur le chemin d’une telle conciliation. Il introduit enfin une conception particulière de la tolérance fondée sur l’idée de justice et indique comment elle permet de remédier aux difficultés précédemment mises en évidence. Toleration and neutrality are usually considered as interchangeable or at least complementary responses to situations of conflict and moral disagreement. However, several authors have recently challenged the complementarity, and even the compatibility, of these two ideas. The paper details this challenge and examines how it can be met. The first part details two arguments against the compatibility of toleration and neutrality. The second shows that if these arguments are not convincing – in the sense that they fail to prove theimpossibilityof conciliating toleration with neutrality – they nevertheless help us to identify two problemsthat may prevent such a reconciliation. The third part sketches a justice-based conception of toleration and explains how it enables us to solve the two problems previously identified.

  2. Lait humain provenant d’une banque de dons ou acheté en ligne?

    Science.gov (United States)

    St-Onge, Maude; Chaudhry, Shahnaz; Koren, Gideon

    2015-01-01

    Résumé Question Une de mes patientes m’a demandé si elle pourrait se procurer du lait humain par Internet pour allaiter son nourrisson s’il le fallait. L’usage de lait humain provenant d’une banque de dons est-il plus sécuritaire que son achat en ligne? Réponse L’Organisation mondiale de la Santé et l’American Academy of Pediatrics recommandent d’utiliser des dons de lait humain comme choix à privilégier lorsque le lait maternel n’est pas disponible. Cependant, la Société canadienne de pédiatrie n’approuve pas le partage de lait humain non traité. Le lait humain entreposé dans les banques de lait diffère de celui qu’on peut se procurer par Internet en raison du processus rigoureux de sélection des donneuses, des fréquentes inspections de la qualité, des procédés de transport règlementés et du processus de pasteurisation conforme aux directives établies par l’Agence canadienne d’inspection des aliments. La plupart des échantillons achetés en ligne contiennent des bactéries à gram négatif ou comptent au total plus de 104 unités formant colonies de bactéries aérobiques par millilitre; ils renferment aussi en moyenne au décompte total plus de bactéries aérobiques, de bactéries à gram négatif, de coliformes et de Staphylococcus spp que les échantillons des banques de lait. La croissance de la plupart des espèces de bactéries est associée au nombre de jours en transit, ce qui porte à croire que les conditions de collecte, d’entreposage et de transport sont médiocres pour le lait acheté en ligne.

  3. Mes chers collègues, les moines, ou le partage de l’ignorance

    Directory of Open Access Journals (Sweden)

    Laurence Caillet

    2009-03-01

    Full Text Available Mes chers collègues, les moines, ou le partage de l’ignorance. Aucun statut ne m’a autant étonnée que celui de collègue qui me fut conféré par les moines du Grand monastère de l’Est, à Nara. Après avoir testé mes connaissances en matière de rituel, ces moines fort savants manifestèrent en effet, avec ostentation, leur ignorance. Pointant pour moi des détails liturgiques qu’ils tenaient pour incompréhensibles, ils prirent un plaisir évident à bavarder histoire et théologie, comme si je pouvais apporter quoi que ce soit. Cette mise en scène du caractère incompréhensible du rituel soulignait le caractère ineffable de cérémonies jadis accomplies au ciel par des entités supérieures. Je fournissais prétexte à décrire la vanité de l’érudition face à l’accomplissement des mystères et aussi l’importance de cette érudition pour renouer avec un sens originel irrémédiablement inconnaissable.My dear colleagues the monks, or the sharing of ignorance. No status has ever surprised me as much as that of “colleague” conferred on me by the monks of the Great Eastern Monastery of Nara. After testing my knowledge of ritual, these very learned monks made great show of their ignorance. Drawing my attention to liturgical details that they held to be incomprehensible, they took obvious pleasure in chatting about history and theology, as if I were capable of making the slightest contribution. This staging of the impenetrable nature of the ritual highlighted the ineffable character of the ceremonies performed in heaven long ago by superior beings. I provided a convenient pretext for describing the vanity of erudition in the face of the accomplishment of the mysteries, and also the importance of this erudition for renewing an original, irreparably unknowable meaning.

  4. Negative ions in liquid helium

    Science.gov (United States)

    Khrapak, A. G.; Schmidt, W. F.

    2011-05-01

    The structure of negative ions in liquid 4He is analyzed. The possibility of cluster or bubble formation around impurity ions of both signs is discussed. It is shown that in superfluid helium, bubbles form around negative alkaline earth metal ions and clusters form around halogen ions. The nature of "fast" and "exotic" negative ions is also discussed. It is assumed that "fast" ions are negative ions of helium excimer molecules localized inside bubbles. "Exotic" ions are stable negative impurity ions, which are always present in small amounts in gas discharge plasmas. Bubbles or clusters with radii smaller the radius of electron bubbles develop around these ions.

  5. The acrylonitrile dimer ion

    Science.gov (United States)

    Ervasti, Henri K.; Jobst, Karl J.; Burgers, Peter C.; Ruttink, Paul J. Ae; Terlouw, Johan K.

    2007-04-01

    Large energy barriers prohibit the rearrangement of solitary acrylonitrile ions, CH2CHCN+, into their more stable hydrogen-shift isomers CH2CCNH+ or CHCH-CNH+. This prompted us to examine if these isomerizations occur by self-catalysis in acrylonitrile dimer ions. Such ions, generated by chemical ionization experiments of acrylonitrile with an excess of carbon dioxide, undergo five dissociations in the [mu]s time frame, as witnessed by peaks at m/z 53, 54, 79, 80 and 105 in their metastable ion mass spectrum. Collision experiments on these product ions, deuterium labeling, and a detailed computational analysis using the CBS-QB3 model chemistry lead to the following conclusions: (i) the m/z 54 ions are ions CH2CHCNH+ generated by self-protonation in ion-dipole stabilized hydrogen-bridged dimer ions [CH2CHCN...H-C(CN)CH2]+ and [CH2CHCN...H-C(H)C(H)CN]+; the proton shifts in these ions are associated with a small reverse barrier; (ii) dissociation of the H-bridged ions into CH2CCNH+ or CHCH-CNH+ by self-catalysis is energetically feasible but kinetically improbable: experiment shows that the m/z 53 ions are CH2CHCN+ ions, generated by back dissociation; (iii) the peaks at m/z 79, 80 and 105 correspond with the losses of HCN, C2H2 and H, respectively. The calculations indicate that these ions are generated from dimer ions that have adopted the (much more stable) covalently bound "head-to-tail" structure [CH2CHCN-C(H2)C(H)CN]+; experiments indicate that the m/z 79 (C5H5N) and m/z 105 (C6H6N2) ions have linear structures but the m/z 80 (C4H4N2) ions consist of ionized pyrimidine in admixture with its stable pyrimidine-2-ylidene isomer. Acrylonitrile is a confirmed species in interstellar space and our study provides experimental and computational evidence that its dimer radical cation yields the ionized prebiotic pyrimidine molecule.

  6. Estresse Isolado ou Associado ao Etanol Libera Prostanóides em Aorta de Ratos via ?2-Adrenoceptores

    Directory of Open Access Journals (Sweden)

    Rafaela de Fátima Ferreira Baptista

    2014-04-01

    Full Text Available Fundamento: Estresse e etanol são ambos, independentemente, importantes fatores de risco cardiovascular. Objetivo: avaliar o risco cardiovascular do consumo de etanol e exposição ao estresse, isolados e em associação, em ratos machos adultos. Métodos: Os ratos foram separados em quatro grupos: controle, etanol (20% na água de beber durante seis semanas, estresse (imobilização 1h dia/5 dias por semana/ 6 semanas e estresse/etanol. As curvas de concentração-resposta à noradrenalina - na ausência e na presença de ioimbina, L-NAME ou indometacina - ou fenilefrina foram determinadas em aortas torácicas com e sem endotélio. EC50 e resposta máxima (n = 8-12 foram comparadas através de ANOVA de dois fatores (two-way / método de Bonferroni. Resultados: Estresse ou estresse em associação com o consumo de etanol aumentaram as respostas máximas de noradrenalina em aortas intactas. Essa hiper-reatividade foi eliminada pela remoção do endotélio, ou pela presença da indometacina ou ioimbina, mas não foi alterada pela presença de L-NAME. Enquanto isso, o consumo de etanol não alterou a reatividade à noradrenalina. As respostas da fenilefrina em aortas com e sem endotélio também permaneceram inalteradas independentemente do protocolo. Conclusão: O estresse crônico aumentou as respostas aórticas dos ratos à noradrenalina. Esse efeito é dependente do endotélio vascular e envolve a liberação de prostanóides vasoconstritores através da estimulação de α-2 adrenoceptores endoteliais. Além disso, o consumo crônico de etanol pareceu não influenciar as respostas de noradrenalina em aorta de rato, nem modificar o aumento de tais respostas observadas em consequência da exposição ao estresse.

  7. Un trophée fait fille ou lorsque l’étranger n’existe pas

    Directory of Open Access Journals (Sweden)

    Simonne Pauwels

    2009-03-01

    Full Text Available Un trophée fait fille ou lorsque l’étranger n’existe pas. Il s’agit de montrer comment sur l’île de Selaru toute femme, tout homme, ou même une vache marine ou une tête coupée, en débarquant sur le rivage pour la première fois, est considéré comme une proie, un butin à rejeter à la mer ou à introduire dans le village. Dans le cas du second choix, l’arrivant est rituellement transformé en un parent avant la tombée de la nuit. Pour l’anthropologue cette intégration éclair a de quoi surprendre. Mais il s’agit d’une société prédatrice qui intègre tous ceux qu’elle peut transformer en parent et relègue les autres à sa périphérie en les qualifiant de « sorciers » ou de « non-humains ». Les uns et les autres jouent cependant un rôle dans les prédations majeures — la chasse et la chasse aux têtes —, qu’exigent la fertilité des jardins et la fécondité des femmes.A trophy made daughter, or when strangers do not exist. This article described how, on the island of Selaru, any man or woman, or even a sea-cow or a cut-off head, landing on the shore for the first time, is considered a prey, spoils to be thrown back into the sea or introduced into the village. In the latter case, the new arrival is ritually transformed into a relative before nightfall. For the anthropologist this “instant integration” is surprising. But this is a predatory society that integrates all those that it can transform into family and relegates the others to the margins, by qualifying them as “sorcerers” or “non-humans”. However, they all play a role in the majors predations - hunting and head-hunting - required for the fertility of women and gardens.

  8. L’utopie inaugurale ou les prémices du mythe chez Vicente Huidobro

    Directory of Open Access Journals (Sweden)

    Stéphanie Dumont

    2012-10-01

    Full Text Available A partir de una lectura de la obra “primitiva” del poeta chileno Vicente Huidobro, el análisis busca establecer la coherencia y la unidad de la primera etapa de constitución de una obra. En estas primeras producciones (1912-1925, Huidobro desarrolla estrategias de escritura que refuerza de un poemario a otro, poniendo en escena figuras poéticas de una estatura tan grandiosa como el proyecto de escritura que ellas animan. La ambición o la utopía “creacionista”, reivindicada en numerosos manifiestos huidobrianos del período, constituye el hilo conductor de este proyecto original, paralelo al que estructura la arquitectura semántica y conceptual de los poemarios. Este sueño inaugural se encarna de manera particular en Adán (1916, primera definición sublimada del Poeta “hacedor” de mundos ; un Adán que se determina también como anticipación de Altazor (1931. Es en este corpus primitivo que comienza a escribirse la historia - o la prehistoria – de un mito en perpetua evolución.A partir d’une lecture des recueils « primitifs » du poète chilien Vicente Huidobro, l’analyse vise à établir une cohérence et une unité au sein de la démarche initiale de fondation d’une œuvre. Ces premières productions (1912-1925 développent des stratégies d’écriture renforcées d’un recueil à l’autre, et mettent en scène des figures poétiques à la stature aussi démesurément grandiose que le projet d’écriture qu’elles soutiennent. De ce projet original, l’ambition ou l’utopie « créationniste », revendiquée dans les nombreux manifestes huidobriens de la période, est la parallèle directrice structurant l’architecture sémantique et conceptuelle des recueils. Ce rêve de l’inauguralité se voit porté plus particulièrement par la figure précoce de l’Adán de 1916, première définition sublimée du Poète « faiseur » de mondes ; un Adán qui se détermine aussi comme anticipation de l

  9. La rhétorique des slogans publicitaires russes postsoviétiques : tradition ou innovation ?

    Directory of Open Access Journals (Sweden)

    Smirnova-Cotet, Tatiana

    2013-09-01

    Full Text Available Résumé : L'objectif principal de la publicité en général et du slogan en particulier est de produire un certain effet sur le destinataire final: le consommateur potentiel doit mémoriser le slogan qui est associé à tel ou tel produit ou service et toute la gamme des émotions que ces derniers doivent susciter. Dans la plupart des cas, ce sont les moyens stylistiques qui assurent la mémorisation du slogan et ainsi produisent un effet sur le consommateur. Dans ce contexte, il serait intéressant de savoir si ces moyens ont changé depuis l'époque soviétique. Pour cela, il faut identifier les tropes employés aux deux grandes périodes étudiées (contemporaine et soviétique, voir quels sont les plus fréquents pour chacune d'elles, et pour quelle(s raison(s, pour comprendre au final ce qui pourrait expliquer la fidélité à certains tropes et le recours à de nouvelles figures dans la période récente. Les hypothèses émises dans le présent article se basent sur un corpus de slogans assez important et ne cessant d'augmenter qui inclut les slogans soviétiques du début du XXème siècle, principalement créés lors de la Nouvelle Politique Economique, les slogans des années 30, période de croissance industrielle, et les slogans qui accompagnaient les affiches publicitaires de la période après la guerre, quand, par exemple, V. TRUXACOV, travaillant dans le réseau du Magasin Central, a créé de nombreuses affiches pour des biens de consommations tels que tissus, aspirateurs, téléviseurs, etc. Ce corpus contient également les quelques slogans de la période de stagnation économique sous le règne de L. BREJNEV quand, dans les conditions de pénurie et de déficit, les produits n'avaient pas besoin d'être mis en avant. Tous ces slogans constituent le groupe de slogans soviétiques qui s'avèrent intéressants à comparer aux slogans de l'espace postsoviétique commençant par la publicité des pyramides financières (MMM

  10. Materials analysis fast ions

    CERN Document Server

    Denker, A; Rauschenberg, J; Röhrich, J; Strub, E

    2006-01-01

    Materials analysis with ion beams exploits the interaction of ions with the electrons and nuclei in the sample. Among the vast variety of possible analytical techniques available with ion beams we will restrain to ion beam analysis with ion beams in the energy range from one to several MeV per mass unit. It is possible to use either the back-scattered projectiles (RBS – Rutherford Back Scattering) or the recoiled atoms itself (ERDA – Elastic Recoil Detection Analysis) from the elastic scattering processes. These techniques allow the simultaneous and absolute determination of stoichiometry and depth profiles of the detected elements. The interaction of the ions with the electrons in the sample produces holes in the inner electronic shells of the sample atoms, which recombine and emit X-rays characteristic for the element in question. Particle Induced X-ray Emission (PIXE) has shown to be a fast technique for the analysis of elements with an atomic number above 11.

  11. Le Fonds Marcel-Griaule : un objet de recherche à partager ou un patrimoine à restituer ?

    Directory of Open Access Journals (Sweden)

    Éric Jolly

    2008-08-01

    Full Text Available Le Fonds Marcel-Griaule, un objet de recherche à partager ou un patrimoine à restituer ? L’ouverture du fonds Griaule aux chercheurs des sociétés ou des régions observées aurait un double effet bénéfique sur la recherche : elle permettrait une meilleure compréhension des données archivées, notamment grâce à la prise en compte du poids des informateurs ou du contexte local dans la production de ces données ; mais elle permettrait également à ces chercheurs d’interroger eux-mêmes leur histoire et leur culture, en exploitant les photographies et les écrits de ce fonds. Produites à l’origine grâce à une collaboration entre des chercheurs étrangers et leurs hôtes ou leurs informateurs locaux, les archives ethnographiques ne sont pas tant un patrimoine à restituer qu’un objet de recherche ou une source d’informations à partager. Analysées et exploitées en commun, ou selon des points de vue complémentaires, elles échapperaient ainsi à toute tentative d’appropriation. Une telle démarche aurait donc l’avantage de désamorcer les enjeux politiques ou patrimoniaux autour de ces documents ethnographiques qui, en tout état de cause, ne doivent jamais être confondus avec les archives des sociétés étudiées.The Marcel-Griaule Archive: a research to be shared or an heritage to be returned? Making the Griaule collection available to researchers of the societies or regions observed would have a doubly beneficial effect on research – it would allow a better comprehension of archived data, especially by taking into account the significance of informants or the local context in producing this data – and it would also allow researchers to examine for themselves their history and culture, by using the photographs and writings in this collection. Originally produced thanks to collaboration between foreign researchers and their hosts or local informants, the ethnographical archives are not so much a heritage to be

  12. Uso de um inibidor da síntese de prostaglandinas em receptoras bovinas com ou sem dificuldade de transposição cervical

    OpenAIRE

    Ribeiro Filho,Antonio de Lisboa; Freitas, Daniela Souza; Rodrigues, Alexandra Soares; Chalhoub, Marcos; Ferraz,Priscila Assis; Loiola,Marcus Vinícius Galvão; Andrade, Bruno Henrique de Araújo

    2011-01-01

    p.819-827 Objetivou-se determinar o efeito do flunixin meglumine sobre a taxa de concepção de receptoras de embriões bovinos com ou sem dificuldade de transposição cervical na inovulação. As receptoras foram distribuídas em quatro grupos experimentais de acordo a dificuldade ou não de transposição cervical e tratamento ou não com flunixin meglumine. Desta forma, os grupos experimentais foram denominados: Não tratadas com flunixin meglumine e sem dificuldade de ...

  13. Correlation ion mobility spectroscopy

    Science.gov (United States)

    Pfeifer, Kent B.; Rohde, Steven B.

    2008-08-26

    Correlation ion mobility spectrometry (CIMS) uses gating modulation and correlation signal processing to improve IMS instrument performance. Closely spaced ion peaks can be resolved by adding discriminating codes to the gate and matched filtering for the received ion current signal, thereby improving sensitivity and resolution of an ion mobility spectrometer. CIMS can be used to improve the signal-to-noise ratio even for transient chemical samples. CIMS is especially advantageous for small geometry IMS drift tubes that can otherwise have poor resolution due to their small size.

  14. Lithium-ion batteries

    CERN Document Server

    Yoshio, Masaki; Kozawa, Akiya

    2010-01-01

    This book is a compilation of up-to-date information relative to Li-Ion technology. It provides the reader with a single source covering all important aspects of Li-Ion battery operations. It fills the gap between the old original Li-Ion technology and present state of the technology that has developed into a high state of practice. The book is designed to provide a single source for an up-to-date description of the technology associated with the Li-Ion battery industry. It will be useful to researchers interested in energy conversion for the direct conversion of chemical energy into electrica

  15. Peristaltic ion source

    Energy Technology Data Exchange (ETDEWEB)

    Brown, I.G.; Anders, A.; Anders, S.; Dickinson, M.R.; MacGill, R.A.

    1995-08-01

    Conventional ion sources generate energetic ion beams by accelerating the plasma-produced ions through a voltage drop at the extractor, and since it is usual that the ion beam is to propagate in a space which is at ground potential, the plasma source is biased at extractor voltage. For high ion beam energy the plasma source and electrical systems need to be raised to high voltage, a task that adds considerable complexity and expense to the total ion source system. The authors have developed a system which though forming energetic ion beams at ground potential as usual, operates with the plasma source and electronics at ground potential also. Plasma produced by a nearby source streams into a grided chamber that is repetitively pulsed from ground to high positive potential, sequentially accepting plasma into its interior region and ejecting it energetically. They call the device a peristaltic ion source. In preliminary tests they`ve produced nitrogen and titanium ion beams at energies from 1 to 40 keV. Here they describe the philosophy behind the approach, the test embodiment that they have made, and some preliminary results.

  16. Ion Source DECRIS-3

    CERN Document Server

    Efremov, A; Lebedev, A N; Loginov, V N; Yazvitsky, N Yu

    1999-01-01

    The ECR ion source DECRIS-3 is the copy of the mVINIS ion source which was designed and built in Dubna for the TESLA Accelerator Installation (Belgrade, Yugoslavia) in 1997. The assembly of the source was completely finished in the end of 1998 and then it was installed at the FLNR ECR test bench. The source was successfully tested with some gases and metals by using the MIVOC technique. In nearest future the source will be capable of ECR plasma heating using two different frequencies simultaneously. We are also going to use the DECRIS-3 ion source to design 1+ -> n+ technique for the DRIBs (Dubna Radioactive Ion Beams) project.

  17. Heavy ion storage rings

    Energy Technology Data Exchange (ETDEWEB)

    Schuch, R.

    1987-01-01

    A brief overview of synchrotron storage rings for heavy ions, which are presently under construction in different accelerator laboratories is given. Ions ranging from protons up to uranium ions at MeV/nucleon energies will be injected into these rings using multiturn injection from the accelerators available or being built in these laboratories. After injection, it is planned to cool the phase space distribution of the ions by merging them with cold electron beams or laser beams, or by using stochastic cooling. Some atomic physics experiments planned for these rings are presented.

  18. OU Ming (欧 明) Pioneer Researcher of Integrated Medicine

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    @@  OU Ming, male, was born in Shunde City of Guangdong Province, December 1924. After graduating from Medical College of Lingnan University in 1948, he was served as a physician in Chinese People's Liberation Army, government organization and Zhongshan Medical College. In 1956, he was appointed the post of participating in the founding of a new medical college, Guangzhou College of Traditional Chinese Medicine, and has worked there ever since, acting in the past as department head of internal medicine, deputy director of the affiliated hospital, director of teaching administration office and vice-president of the college successively and now as a full professor. Cardiovascular disease is his speciality and he has devoted to the scientific study of integration of traditional and western medicine in his field since then. He has taken charge of various national research projects, including “Clinical and Experimental Studies of the Effect of Ilexonin A on Congestive Heart Failure”, “The Molecular Biological Basis of Deficiency Syndrome in Traditional Chinese Medicine”, “Clinical and Experimental Studies of the Effect of Kaixin Capsule on Asymptomatic Myocardial Ischemia”, etc., and acted as the head of national collaborating group studying the treatment of cardiovascular diseases by traditional Chinese medicine and the integration of traditional and western medicine, a national key project of medicine in the 7th Five-Year Plan. Many achievements in scientific research have been obtained, which were appraised by experts as the achievements of advanced level in the country. A total of thirteen prizes (science and technology progress prize and commendation prize) has been awarded to him by Ministry of Science and Technology, Ministry of Health, State Administration of Traditional Chinese Medicine and Guangdong Commission of Science and Technology.   His writings are abundant. More than ten monographs concerning traditional Chinese medicine have been

  19. Cold Strontium Ion Source for Ion Interferometry

    Science.gov (United States)

    Jackson, Jarom; Durfee, Dallin

    2015-05-01

    We are working on a cold source of Sr Ions to be used in an ion interferometer. The beam will be generated from a magneto-optical trap (MOT) of Sr atoms by optically ionizing atoms leaking out a carefully prepared hole in the MOT. A single laser cooling on the resonant transition (461 nm) in Sr should be sufficient for trapping, as we've calculated that losses to the atom beam will outweigh losses to dark states. Another laser (405 nm), together with light from the trapping laser, will drive a two photon transition in the atom beam to an autoionizing state. Supported by NSF Award No. 1205736.

  20. Desempenho de bezerros da raça holandesa com desaleitamento aos 28 ou 56 dias de idade, com ou sem aditivo à base de oligossacarídeo de manana

    Directory of Open Access Journals (Sweden)

    Sandi Décio

    2001-01-01

    Full Text Available Vinte e quatro bezerros da raça Holandesa foram utilizados num experimento com delineamento completamente casualizado, em arranjo fatorial 2x2 (desaleitamento aos 28 ou 56 dias, com ou sem a adição de oligossacarídio de manana à dieta, e seis repetições por tratamento. Não houve interação entre os fatores período de aleitamento e uso ou não de aditivo. O desaleitamento aos 28 dias, em comparação com 56 dias, resultou, aos 56 dias de idade, em menor peso final, menor ganho médio diário de peso, maior consumo de concentrado, menor consumo total de matéria seca e pior conversão alimentar. Não houve diferenças em relação às medidas corporais iniciais e finais de altura de cernelha, perímetro torácico e abdominal, embora o desaleitamento aos 28 dias tenha diminuído o ganho médio diário de perímetro torácico. Em um levantamento dos custos de alimentação, medicamentos e mão-de-obra veterinária, os animais desaleitados aos 28 dias apresentaram menor custo total individual e menor custo por kg de ganho de peso. O emprego do aditivo não afetou as dimensões corporais, porém resultou em maior ganho de peso, final e diário, e melhor conversão alimentar, reduzindo o custo médio por kg de ganho de peso.

  1. Ion channels in toxicology.

    Science.gov (United States)

    Restrepo-Angulo, Iván; De Vizcaya-Ruiz, Andrea; Camacho, Javier

    2010-08-01

    Ion channels play essential roles in human physiology and toxicology. Cardiac contraction, neural transmission, temperature sensing, insulin release, regulation of apoptosis, cellular pH and oxidative stress, as well as detection of active compounds from chilli, are some of the processes in which ion channels have an important role. Regulation of ion channels by several chemicals including those found in air, water and soil represents an interesting potential link between environmental pollution and human diseases; for instance, de novo expression of ion channels in response to exposure to carcinogens is being considered as a potential tool for cancer diagnosis and therapy. Non-specific binding of several drugs to ion channels is responsible for a huge number of undesirable side-effects, and testing guidelines for several drugs now require ion channel screening for pharmaceutical safety. Animal toxins targeting human ion channels have serious effects on the population and have also provided a remarkable tool to study the molecular structure and function of ion channels. In this review, we will summarize the participation of ion channels in biological processes extensively used in toxicological studies, including cardiac function, apoptosis and cell proliferation. Major findings on the adverse effects of drugs on ion channels as well as the regulation of these proteins by different chemicals, including some pesticides, are also reviewed. Association of ion channels and toxicology in several biological processes strongly suggests these proteins to be excellent candidates to follow the toxic effects of xenobiotics, and as potential early indicators of life-threatening situations including chronic degenerative diseases.

  2. VIRTUALIDADE OU DESMATERIALIZAÇÃO DOS TÍTULOS DE CRÉDITO NA SOCIEDADE EM REDE E ERA DA INFORMAÇÃO - TEORIA DA “CÁRTULA” ELETRÔNICA, MAGNÉTICA OU DIGITAL

    OpenAIRE

    Nunes, Cláudia Ribeiro Pereira

    2013-01-01

    O Direito Empresarial precisa solucionar os conflitos provenientes dos negócios empresariais na Sociedade em Rede e Era da Informação. Este trabalho tem por objetivo geral tratar da performance dos títulos de crédito virtuais ou desmaterializados, utilizados na prática negocial brasileira, apresentando as bases epistemológicas da teoria da “cártula” eletrônica na sociedade de rede. A hipótese investigada  é o vertiginoso incremento desses títulos, obrigando mudanças e ajustes para que o direi...

  3. VIRTUALIDADE OU DESMATERIALIZAÇÃO DOS TÍTULOS DE CRÉDITO NA SOCIEDADE EM REDE E ERA DA INFORMAÇÃO - TEORIA DA “CÁRTULA” ELETRÔNICA, MAGNÉTICA OU DIGITAL

    OpenAIRE

    Nunes, Cláudia Ribeiro Pereira

    2013-01-01

    O Direito Empresarial precisa solucionar os conflitos provenientes dos negócios empresariais na Sociedade em Rede e Era da Informação. Este trabalho tem por objetivo geral tratar da performance dos títulos de crédito virtuais ou desmaterializados, utilizados na prática negocial brasileira, apresentando as bases epistemológicas da teoria da “cártula” eletrônica na sociedade de rede. A hipótese investigada  é o vertiginoso incremento desses títulos, obrigando mudanças e ajustes para que o direi...

  4. Study of the raw materials used in the manufacture of ceramics in Fran Ali (Oued Laou, Marruecos); Estudio de materiales usados en la fabricacion de las ceramicas de Fran Ali (Oued Laou, Marruecos)

    Energy Technology Data Exchange (ETDEWEB)

    Barrios Neira, J.; Martin de la Cruz, J. C.; Montealegre Contreras, L.

    2012-11-01

    The thermal behaviour, mineralogy, texture and micro-structure of the original rocks used as raw materials in the manufacture of ceramics of the potter community in Fran Ali (Oued Laou, Tetouan, Morocco) were studied. The original rocks of the alteration deposit are metapelites and altered philites from the Units Malaguide-Gomaride in the Baetic-Rifian mountain system. The techniques used by local potters and the water used to prepare the ceramic bodies were also studied. Original rocks are metapelites or filadios and raw materials belong to levels caused by exogenous or supergene alteration (quartz-illite and chlorite type clays). The ceramics studied by microscopy exhibit anisotropy. (Author) 15 refs.

  5. Metal Ions in Unusual Valency States.

    Science.gov (United States)

    Sellers, Robin M.

    1981-01-01

    Discusses reactivity of metal ions with the primary products of water radiolysis, hyper-reduced metal ions, zero-valent metal ions, unstable divalent ions from the reduction of bivalent ions, hyper-oxidized metal ions, and metal complexes. (CS)

  6. Where do ions solvate?

    Indian Academy of Sciences (India)

    Yan Levin

    2005-06-01

    We study a simple model of ionic solvation inside a water cluster. The cluster is modeled as a spherical dielectric continuum. It is found that unpolarizable ions always prefer the bulk solvation. On the other hand, for polarizable ions, there exists a critical value of polarization above which surface solvation becomes energetically favorable for large enough water clusters.

  7. Ion-beam technologies

    Energy Technology Data Exchange (ETDEWEB)

    Fenske, G.R. [Argonne National Lab., IL (United States)

    1993-01-01

    This compilation of figures and diagrams reviews processes for depositing diamond/diamond-like carbon films. Processes addressed are chemical vapor deposition (HFCVD, PACVD, etc.), plasma vapor deposition (plasma sputtering, ion beam sputtering, evaporation, etc.), low-energy ion implantation, and hybrid processes (biased sputtering, IBAD, biased HFCVD, etc.). The tribological performance of coatings produced by different means is discussed.

  8. Microfabricated cylindrical ion trap

    Science.gov (United States)

    Blain, Matthew G.

    2005-03-22

    A microscale cylindrical ion trap, having an inner radius of order one micron, can be fabricated using surface micromachining techniques and materials known to the integrated circuits manufacturing and microelectromechanical systems industries. Micromachining methods enable batch fabrication, reduced manufacturing costs, dimensional and positional precision, and monolithic integration of massive arrays of ion traps with microscale ion generation and detection devices. Massive arraying enables the microscale cylindrical ion trap to retain the resolution, sensitivity, and mass range advantages necessary for high chemical selectivity. The microscale CIT has a reduced ion mean free path, allowing operation at higher pressures with less expensive and less bulky vacuum pumping system, and with lower battery power than conventional- and miniature-sized ion traps. The reduced electrode voltage enables integration of the microscale cylindrical ion trap with on-chip integrated circuit-based rf operation and detection electronics (i.e., cell phone electronics). Therefore, the full performance advantages of microscale cylindrical ion traps can be realized in truly field portable, handheld microanalysis systems.

  9. Aspectos reprodutivos e produtivos de vacas da raça Holandesa com puerpério normal ou patológico

    National Research Council Canada - National Science Library

    Martins, T.M; Santos, R.L; Paixão, T.A; Costa, É.A; Pires, A.C; Borges, Á.M

    2013-01-01

    ... de lactação, com o objetivo de comparar aspectos reprodutivos e produtivos dos animais com puerpério normal ou patológico. Exames ginecológicos foram realizados semanalmente, do parto ao final...

  10. Ion mobility sensor system

    Science.gov (United States)

    Xu, Jun; Watson, David B.; Whitten, William B.

    2013-01-22

    An ion mobility sensor system including an ion mobility spectrometer and a differential mobility spectrometer coupled to the ion mobility spectrometer. The ion mobility spectrometer has a first chamber having first end and a second end extending along a first direction, and a first electrode system that generates a constant electric field parallel to the first direction. The differential mobility spectrometer includes a second chamber having a third end and a fourth end configured such that a fluid may flow in a second direction from the third end to the fourth end, and a second electrode system that generates an asymmetric electric field within an interior of the second chamber. Additionally, the ion mobility spectrometer and the differential mobility spectrometer form an interface region. Also, the first end and the third end are positioned facing one another so that the constant electric field enters the third end and overlaps the fluid flowing in the second direction.

  11. Lipid Ion Channels

    CERN Document Server

    Heimburg, Thomas

    2010-01-01

    The interpretation electrical phenomena in biomembranes is usually based on the assumption that the experimentally found discrete ion conduction events are due to a particular class of proteins called ion channels while the lipid membrane is considered being an inert electrical insulator. The particular protein structure is thought to be related to ion specificity, specific recognition of drugs by receptors and to macroscopic phenomena as nerve pulse propagation. However, lipid membranes in their chain melting regime are known to be highly permeable to ions, water and small molecules, and are therefore not always inert. In voltage-clamp experiments one finds quantized conduction events through protein-free membranes in their melting regime similar to or even undistinguishable from those attributed to proteins. This constitutes a conceptual problem for the interpretation of electrophysiological data obtained from biological membrane preparations. Here, we review the experimental evidence for lipid ion channels...

  12. Ion-by-ion Cooling efficiencies

    CERN Document Server

    Gnat, Orly

    2011-01-01

    We present ion-by-ion cooling efficiencies for low-density gas. We use Cloudy (ver. 08.00) to estimate the cooling efficiencies for each ion of the first 30 elements (H-Zn) individually. We present results for gas temperatures between 1e4 and 1e8K, assuming low densities and optically thin conditions. When nonequilibrium ionization plays a significant role the ionization states deviate from those that obtain in collisional ionization equilibrium (CIE), and the local cooling efficiency at any given temperature depends on specific non-equilibrium ion fractions. The results presented here allow for an efficient estimate of the total cooling efficiency for any ionic composition. We also list the elemental cooling efficiencies assuming CIE conditions. These can be used to construct CIE cooling efficiencies for non-solar abundance ratios, or to estimate the cooling due to elements not explicitly included in any nonequilibrium computation. All the computational results are listed in convenient online tables.

  13. Change in Heavy Rainfall Characteristics over the Ouémé River Basin, Benin Republic, West Africa

    Directory of Open Access Journals (Sweden)

    Jean Hounkpè

    2016-03-01

    Full Text Available Climate change has severe impacts on natural resources, food production and consequently on food security especially in developing countries. Likely accentuated by climate change, flooding is one of the disasters that affects people and destroies agricultural land and products. At different governance levels and scales, appropriate responses are needed. Cluster analysis using scaled at-site characteristics was used to determine homogeneous rainfall regions. A methodology for detecting change was applied to heavy daily rainfall of 34 stations across the Ouémé basin, Benin, in order to assess potential change in its characteristics. The spatial variability of the detected changes in return periods was analyzed using the kriging interpolation method. For this analysis, up to 92 years (1921–2012 of rainfall data were used. Three homogeneous regions were found by the cluster analysis. For all studied return periods, 82% of the stations showed statistically significant change in daily precipitation, among which 57% exhibited a positive change and 43% negative change. A positive change is associated with an increase in heavy rainfall over the area of concern. An analysis of the interpolated change in heavy rainfall of different return periods revealed an east-west gradient from negative to positive along the lower Ouémé basin (Region 2. From the middle to the upper Ouémé (Region 1 and 3, a decreasing tendency of heavy rainfall is dominant mainly for the non-homogeneous period. This result of the complex pattern of changes could be veritable information for decision makers and consequently for development of appropriate adaptation measures.

  14. O Professor: Líder Ou Transferidor De Conhecimentos? A Percepção Dos Alunos Em Diferentes Cursos

    OpenAIRE

    Scharf, Edson Roberto; Soriano-Sierra, Eduardo Juan; Domingues, Maria José Carvalho de Souza

    2006-01-01

    Muito do esforço feito pelo professor no preparo das aulas, nas pesquisas e nos artigos está relacionado com o compartilhamento do conhecimento na sala de aula. Mas o aluno de determinado curso entende o professor como um líder que auxilia o seu crescimento ou como um transferidor de conhecimentos? Vê o professor como um modelo a ser seguido na vida profissional? Com o fito de entender melhor esta relação, foi analisada uma pesquisa em ambientes de ensino muito diversos e com i...

  15. Por que lavar ou não as mãos? : motivos de um grupo de enfermagem

    OpenAIRE

    2005-01-01

    Por meio de um estudo qualitativo, investigou-se junto a trabalhadores de enfermagem de um hospital de pronto socorro sobre as razões que os impulsionam a lavar ou não as mãos, sendo este ato uma importante medida de controle de infecção hospitalar. Os dados, obtidos mediante a técnica de grupo focal, foram submetidos à análise de enunciação, resultando em temas emergentes. Evidenciou-se que o suprimento de recursos materiais e ambientais é fundamental mas não dá conta da problemática. A ades...

  16. L’œuvre d’Alan Berliner ou l’autobiographie comme l’affaire de tous

    OpenAIRE

    Lioult, Jean-Luc

    2014-01-01

    Cinéaste indépendant fascinant et inclassable, Alan Berliner a consacré 25 ans à la réalisation de films qui le conduisent d’une réflexion sur la famille en général, à la mise en question de la sienne propre, puis à une interrogation sur son identité et enfin à son autoportrait en tant qu’artiste. Ces œuvres ne se conforment pas totalement aux normes habituelles des documentaires subjectifs ou autobiographiques. Historiquement parlant, Berliner ...

  17. Diagnósticos de enfermagem em cliente com (TCE e em seu familiar e/ou pessoa significativa

    Directory of Open Access Journals (Sweden)

    Anialcy Barbosa Faria

    1996-12-01

    Full Text Available O presente trabalho tem por objetivo relatar o estudo de caso de um cliente com TCE e em seu familiar e/ou pessoa significativa, levantando os Diagnósticos de Enfermagem segundo a Taxonomia I da NANDA (North American Diagnosis Association, utilizando-se a Teoria das Necessidades Humanas Básicas Afetadas de Wanda Horta. O estudo foi realizado no Hospital Universitário Antonio Pedro, UFF, onde foram encontrados 6 diagnósticos de enfermagem para o cliente e 1 para o familiar.

  18. Diplomatie universitaire ou diplomatie culturelle ? La Cité internationale universitaire de Paris entre deux rives (1920-1940)

    OpenAIRE

    Tronchet, Guillaume

    2013-01-01

    International audience; Il peut paraître tentant, au premier abord, de faire de la Cité internationale universitaire de Paris le fruit de cette diplomatie culturelle française mise en œuvre par les élites de la IIIe République au lendemain de la Grande Guerre. Les choses, nous semble-t-il, sont cependant plus complexes. Si la Cité internationale universitaire est bien partie prenante de ce processus, son histoire plonge ses racines dans un cadre moins connu ou, à tout le moins, guère théorisé...

  19. Cirurgia valvar mitral e da comunicação interatrial: abordagem minimamente invasiva ou por esternotomia

    OpenAIRE

    Castro Neto,Josué V.; Emanuel Melo; Juliana Fernandes; Regina Gomes; Caroline Freitas; João Machado; Francisco Martins; Aloísio Barbosa; Bernardo Oliveira; Cesar Gondim

    2012-01-01

    FUNDAMENTO: Para diminuir o trauma cirúrgico em procedimentos cardiovasculares, técnicas Minimamente Invasivas (MI) foram alternativamente introduzidas. OBJETIVO: Comparar o acesso cirúrgico MI com a Esternotomia Mediana (EM) para tratar a cardiopatia valvar mitral (VM) e a Comunicação Interatrial (CIA). MÉTODOS: Estudo prospectivo onde quarenta pacientes foram submetidos a cirurgia para correção de cardiopatia VM ou CIA. Foram divididos em: grupo A (GA) (n = 20), de acesso por minitoracotomi...

  20. A vez e a voz de mulheres-mães com filhos e ou netos institucionalizados

    OpenAIRE

    D'Aroz, Marlene Schüssler

    2013-01-01

    Resumo: A presente tese enfoca mulheres-mães em situação de vulnerabilidade e com filhos e ou netos institucionalizados. Defende-se que a vulnerabilidade e as constantes situações e formas de violência por elas enfrentadas, presentes em todas as dimensões e ao longo das gerações, se repetem, dificultando emergir do anonimato da vida nos becos e construir outras e novas histórias de vida com seus pares. Visa-se, assim, identificar aspectos incidentes e reincidentes nas histórias de vida de mul...

  1. Chemistry Wastewater Treatment of El-Oued City (South-East of Algeria) by Utilization of Typha Latifolia

    OpenAIRE

    Zeghdi Saad; Bebba Ahmed Abdelhafid; Laouini Salah Eddine

    2016-01-01

    The objective of this study is to show the potential of Typha latifolia in the Purification performance of wastewater in the region of El Oued (southeast of Algeria). The pilot scale consists of two beds of plastics, filled with gravel and sand. One was planted saplings Typha latifolia at 36 stems/m2, the second was not planted serves as a control (witness). The results show good yields for suspended solids and organic pollution, removal rates are 96,76% for (SS) 89,92% for the Chemical Oxyge...

  2. Démarche pour le choix et/ou la conception d'un moyen de soudage par FSW

    OpenAIRE

    ZIMMER-CHEVRET, Sandra; LANGLOIS, Laurent; LAYE, Julien; Goussain, Jean-Claude; Martin, Patrick; Bigot, Régis

    2009-01-01

    National audience; Les travaux de recherches présentés concernent l'industrialisation du procédé de soudage par friction malaxage, également appelé Friction Stir Welding (FSW). L'objectif est de fournir des outils aux industriels pour choisir et qualifier une machine pour leurs applications de FSW. Cet article présente une méthodologie pour qualifier et / ou concevoir les moyens de soudage adaptés à une application donnée. La démarche de qualification repose sur l'étude géométrique des pièces...

  3. Laser ion source for high brightness heavy ion beam

    Science.gov (United States)

    Okamura, M.

    2016-09-01

    A laser ion source is known as a high current high charge state heavy ion source. However we place great emphasis on the capability to realize a high brightness ion source. A laser ion source has a pinpoint small volume where materials are ionized and can achieve quite uniform low temperature ion beam. Those features may enable us to realize very small emittance beams. In 2014, a low charge state high brightness laser ion source was successfully commissioned in Brookhaven National Laboratory. Now most of all the solid based heavy ions are being provided from the laser ion source for regular operation.

  4. Religious / Spiritual: Differences in Substance or Style? (Ser “Religioso/a” ou “Espiritualizado/a”: Diferenças Essenciais ou de Estilo? - DOI: 10.5752/P.2175-5841.2012v10n28p1280

    Directory of Open Access Journals (Sweden)

    Kevin Lee Ladd

    2012-12-01

    Full Text Available Enquanto estudiosos debatem os termos “espiritualizado/a” e “religioso/a”,  surgem no cenário pessoas que prontamente se auto-identificam como sendo “espiritualizadas mas não religiosos/as” (SNR ou  “religiosas mas não espiritualizadas” (RNS ou ainda como sendo, simultaneamente, “espiritualizadas e religiosas” (BSR, ou então, “nem espiritualizadas nem religiosas (NONE. Este estudo investigou como estas categorias auto identificatórias relacionam-se à essência e estilo das orações das pessoas e  outras características com base em crenças religiosas. Participantes (N = 103 responderam a uma pesquisa via internet. RNS e SNR não apresentaram respondentes suficientes para uma análise. Não houve distinção entre os BSR e SNR  em relação à essência de suas orações e percepções de Deus como amor ou controle. Igualmente, os dois grupos valorizaram suas posições de fé para se auto-identificarem. BSR relataram maior proximidade de Deus. Os respondentes das categorias BSR e SNR foram significativamente diferentes em muitas características relacionadas aos estilos (por exemplo, frequência aos cultos; frequência e duração da oração; idade da primeira oração. Estes dois grupos foram semelhantes em suas preferências pela prática da oração a sós. Tais resultados sugerem que as diferenças que designam as categorias “espiritualizado/a”  e/ou “religioso/a” podem ter mais a ver com o estilo do que a essência do sistema de fé abraçado. Key words: Religioso/a. Espiritualizado/a. Oração. Essência. Estilo.Abstract While scholars debate the terms “spiritual” and “religious,” people readily self-identify as “spiritual not religious (SNR,” “religious not spiritual (RNS,” “both spiritual and religious (BSR,” or “neither spiritual nor religious (NONE.” This study investigated how these self labels related to the substance and style of people’s prayers and other faith

  5. Une éducation sentimentale ou le roman d’amour de Salammbô

    Directory of Open Access Journals (Sweden)

    Geneviève Mondon

    2010-09-01

    Full Text Available La transcription et l’étude des manuscrits préparatoires de Salammbô a permis de retracer la genèse du personnage féminin, en mettant en valeur son aventure personnelle. Les passages inédits, les marges et écritures interlinéaires apportent des éléments précieux pour construire le roman d’amour de l’héroïne, et lui donner une tonalité plus érotique, avant que Flaubert ne supprime, transforme ou masque habilement ces traces éphémères. Afin que les lignes soient plus nettes, ma recherche privilégie le point de vue de Salammbô, pour autant qu’on puisse connaître cette figure énigmatique. En laissant de côté, volontairement, les problèmes primordiaux du roman, la guerre historique de Carthage, la lutte mythique entre Tanit et Moloch, la grande Histoire et la mythologie, les batailles et les massacres, la lumière se concentre sur l’aventure sentimentale, absolument nécessaire dans un roman historique, l’auteur le sait. L’évocation du milieu social de la fille du suffète Hamilcar, l’analyse de son psychisme, de ses désirs, de ses rêves et de ses croyances apportent un éclairage sur sa vie de femme. L’examen d’un inédit comme les pages consacrées à la danseuse montre la volonté du romancier de créer un personnage séduisant et actif. Devant les guerriers a lieu l’« épiphanie », caractéristique des héros : le chant lyrique et la danse ésotérique en sont les signes manifestes. Après la rencontre, Salammbô et Mâtho, en proie au désir amoureux, se cherchent, se fuient et rêvent l’un de l’autre. Un inédit rapporte le songe de la jeune femme. Des expériences qui allient plaisir et souffrances, l’union mystique avec le serpent, la « baisade » contribuent à son éducation sentimentale mais la déception finale, l’échec du désir, est la vraie révélation.The transcription and study of Salammbô’s preparatory manuscripts enable us to retrace the genesis of the feminine

  6. Le journalisme et les sciences sociales. Trouble ou problème ?

    Directory of Open Access Journals (Sweden)

    Gilles Bastin

    2017-01-01

    Full Text Available La sociologie et le journalisme, comme disciplines de factualisation du monde social (c’est-à-dire de transformation d’un réel continu en une série discontinue de faits susceptibles d’analyse causale et d’interprétation, présentent de nombreux points de convergence. Elles partagent certaines méthodes comme celle de l’entretien et ont connu des périodes d’échanges intenses dans certains pays comme les États-Unis. Il serait absurde de dire que sociologues et journalistes se ressemblent toujours. En revanche il n’est pas absurde de noter qu’un sociologue et un journaliste peuvent plus se ressembler dans leur façon de construire, de collecter et d’analyser des faits que deux sociologues entre eux ou deux journalistes entre eux. Malgré cela les sociologues partagent souvent de tenaces préjugés quant aux journalistes. Dans cet article on examine ces préjugés en relation aux deux principales formes prises par la « panique morale » diffuse qui s’est emparée des sociétés modernes à l’âge des médias de masse : la peur de l’imitation à la fin du XIXe siècle et la peur de la massification au milieu du XXe siècle. Le rejet par Émile Durkheim de l’idée que les journaux puissent avoir un rôle dans les phénomènes de suicide autour de 1895 et le rejet par Pierre Bourdieu et Jean-Claude Passeron de l’analyse des communications de masse au début des années 1960 servent de cas d’étude. En adoptant une telle stratégie de rupture, que nous assimilons à une forme de « boundary work », les sociologues prennent le risque d’alimenter la panique morale dont sont victimes les journalistes au lieu de la réduire, de rester au niveau du « trouble » personnel provoqué par les médias sans aller vers la construction d’un « problème » social à propos des médias. As factualization disciplines of the social world (in that they transform a continuous reality into a discontinuous series of facts open

  7. My Son The Fanatic, de Hanif Kureishi, ou l’intégration à rebours

    Directory of Open Access Journals (Sweden)

    Jean-Paul Revauger

    2007-11-01

    Full Text Available Utiliser un film, ou toute création culturelle, pour comprendre le social pose un certain nombre de problèmes méthodologiques. Un film n’est pas un « reflet ». Une création, même si elle se place sous le sceau du réalisme, a un rapport très fort mais indirect avec le contexte historique de sa genèse. Elle est le produit de la rencontre d’un contexte, d’un créateur doté d’une idéologie, d’un « habitus », d’un corpus de valeurs, des modes et techniques en vigueur dans le champ de la création au moment de celle-ci et, comme le rappelle Bourdieu, de la stratégie du créateur par rapport à ses collègues/concurrents. Enfin, sans ajouter une note discordante supplémentaire aux théories de la réception, l’œuvre sera perçue de façon différente selon les publics. My Son the Fanatic sera donc perçu comme une œuvre satanique par les fondamentalistes musulmans, mais sans doute aussi chrétiens, comme une bluette charmante par les midinettes au grand cœur qui semblent être le public visé par la présentation publicitaire du film, comme une démonstration de la justesse de leurs thèses par les partisans de l’intégration, mais aussi par les émules de Huntington pour qui le choc des civilisations est inéluctable, enfin comme une manifestation irresponsable d’ « islamophobie » par les nostalgiques des politiques multiculturalistes d’antan. Les aficionados de Hanif Kureishi, auteur de la nouvelle sur laquelle le film est fondé, et scénariste du film lui-même, y retrouveront le plaidoyer pour la liberté individuelle et, en particulier, la liberté sexuelle qu’ils attendent, mais seront un peu surpris par les côtés didactiques, pour employer cet adjectif dans une acception qui déplait aux didacticiens, c'est-à-dire une volonté de démonstration un peu insistante.Using films, or, for that matter, any cultural artefact in order to reach an understanding of social issues raises a number of

  8. Ion channels in inflammation.

    Science.gov (United States)

    Eisenhut, Michael; Wallace, Helen

    2011-04-01

    Most physical illness in vertebrates involves inflammation. Inflammation causes disease by fluid shifts across cell membranes and cell layers, changes in muscle function and generation of pain. These disease processes can be explained by changes in numbers or function of ion channels. Changes in ion channels have been detected in diarrhoeal illnesses, pyelonephritis, allergy, acute lung injury and systemic inflammatory response syndromes involving septic shock. The key role played by changes in ion transport is directly evident in inflammation-induced pain. Expression or function of all major categories of ion channels like sodium, chloride, calcium, potassium, transient receptor potential, purinergic receptor and acid-sensing ion channels can be influenced by cyto- and chemokines, prostaglandins, leukotrienes, histamine, ATP, reactive oxygen species and protons released in inflammation. Key pathways in this interaction are cyclic nucleotide, phosphoinositide and mitogen-activated protein kinase-mediated signalling, direct modification by reactive oxygen species like nitric oxide, ATP or protons and disruption of the cytoskeleton. Therapeutic interventions to modulate the adverse and overlapping effects of the numerous different inflammatory mediators on each ion transport system need to target adversely affected ion transport systems directly and locally.

  9. Polarized negative ions

    Energy Technology Data Exchange (ETDEWEB)

    Haeberli, W.

    1981-04-01

    This paper presents a survey of methods, commonly in use or under development, to produce beams of polarized negative ions for injection into accelerators. A short summary recalls how the hyperfine interaction is used to obtain nuclear polarization in beams of atoms. Atomic-beam sources for light ions are discussed. If the best presently known techniques are incorporated in all stages of the source, polarized H/sup -/ and D/sup -/ beams in excess of 10 ..mu..A can probably be achieved. Production of polarized ions from fast (keV) beams of polarized atoms is treated separately for atoms in the H(25) excited state (Lamb-Shift source) and atoms in the H(1S) ground state. The negative ion beam from Lamb-Shift sources has reached a plateau just above 1 ..mu..A, but this beam current is adequate for many applications and the somewhat lower beam current is compensated by other desirable characteristics. Sources using fast polarized ground state atoms are in a stage of intense development. The next sections summarize production of polarized heavy ions by the atomic beam method, which is well established, and by optical pumping, which has recently been demonstrated to yield very large nuclear polarization. A short discussion of proposed ion sources for polarized /sup 3/He/sup -/ ions is followed by some concluding remarks.

  10. Ion optics of RHIC electron beam ion source

    Energy Technology Data Exchange (ETDEWEB)

    Pikin, A.; Alessi, J.; Beebe, E.; Kponou, A.; Okamura, M.; Raparia, D.; Ritter, J.; Tan, Y. [Brookhaven National Laboratory, Upton, New York 11973 (United States); Kuznetsov, G. [Budker Institute of Nuclear Physics, Novosibirsk 630090 (Russian Federation)

    2012-02-15

    RHIC electron beam ion source has been commissioned to operate as a versatile ion source on RHIC injection facility supplying ion species from He to Au for Booster. Except for light gaseous elements RHIC EBIS employs ion injection from several external primary ion sources. With electrostatic optics fast switching from one ion species to another can be done on a pulse to pulse mode. The design of an ion optical structure and the results of simulations for different ion species are presented. In the choice of optical elements special attention was paid to spherical aberrations for high-current space charge dominated ion beams. The combination of a gridded lens and a magnet lens in LEBT provides flexibility of optical control for a wide range of ion species to satisfy acceptance parameters of RFQ. The results of ion transmission measurements are presented.

  11. IN MEMORIAM ION VATAMANU

    Directory of Open Access Journals (Sweden)

    S.P. Palii

    2012-12-01

    Full Text Available A dreamer in his creative solitude, an objective and lucid analyst of history and contemporaneity, an energetic and decisive leader with an uncanny ability for crisis management – all these describe Ion Vatamanu. His wife Elena and daughters Mihaela, Mariana, Leontina treasure a personal universe in which the magical spark of Ion Vatamanu’s love and joy of life meld the everyday in and out of poetry. Ion Vatamanu’s instantaneous connection to the audiences and deeply felt words still touch the hearts of his many colleagues and friends. Downloads: 2

  12. Collective Ion Acceleration.

    Science.gov (United States)

    1980-01-01

    Bostick, Appl. Phys. Lett. 35, 296 (1979). 3. S. Humphries, R.N. Sudan, and IV. Condit, Appl. Phys. Lett. 26, 667 (1975). 4. D.S. Prono , J.M. Creedon, I...and to provide a good ion depenently by Creedon, Smith, and Prono ." In both source at the second anode A2. The ion flux from the of these approaches...and Ion Beam Research and Technology, (Ith- Let. 37, 1236 (1977). ac, New York,1977), Vol. 11, p. 819. 72. D. S. Prono , J. W. Shearer, and X J. Briggs

  13. Ion implantation technology

    CERN Document Server

    Downey, DF; Jones, KS; Ryding, G

    1993-01-01

    Ion implantation technology has made a major contribution to the dramatic advances in integrated circuit technology since the early 1970's. The ever-present need for accurate models in ion implanted species will become absolutely vital in the future due to shrinking feature sizes. Successful wide application of ion implantation, as well as exploitation of newly identified opportunities, will require the development of comprehensive implant models. The 141 papers (including 24 invited papers) in this volume address the most recent developments in this field. New structures and possible approach

  14. Equipes de trabalho ou grupos de cooperativos na Semana Acadêmica Integrada do IFRS - Campus Osório

    Directory of Open Access Journals (Sweden)

    Aline Silva De Bona

    2016-11-01

    Full Text Available O trabalho é uma reflexão sobre a ação de uma comissão organizadora de um evento do tipo semana acadêmica integrada de ensino superior de três cursos do IFRS - Campus Osório, que aconteceu em maio de 2016. Tal reflexão tem o objetivo de discutir o que são equipes de trabalho ou grupos cooperativos segundo as teorias da administração que diferenciam grupos de equipes, e da educação que delineiam as ações de cooperar e colaborar como distintas, enquanto para a área da informática são similares. A metodologia é um estudo de caso ancorado em um relato de experiência sobre este evento, e que descreve como resultado a importância profissional de se distinguir termos conceituais tanto na teoria como na prática, pois tais podem se tornam um diferencial profissional para qualquer área atualmente, além das percepções e responsabilizações dos estudantes da comissão organizadora quanto as diferentes formas de atuar e trabalhar sejam em grupos ou equipes.

  15. Water quality assessment of highly polluted rivers in a semi-arid Mediterranean zone Oued Fez and Sebou River (Morocco)

    Science.gov (United States)

    Perrin, J. L.; Raïs, N.; Chahinian, N.; Moulin, P.; Ijjaali, M.

    2014-03-01

    Oued Fez (one of the Sebou River tributaries - Morocco) allowed us to study and quantify the effect of the lack of wastewater treatment on surface water quality in semi-arid hydrological context. The analysis is based on field data collected from June 2009 to December 2011. Concentration and load patterns of nitrogen, phosphorus and chromium (used in the processing of leather) are compared in stable hydrological conditions during low flow and high flow periods in an eight-location sampling network. The Oued Fez and the Sebou River are characterised by severe pollution downstream from the city of Fez, particularly TN (mainly NH4 and Norg), TP (mainly Ppart) and TCr. The most polluted sites are those directly under the influence of domestic and industrial waste water inputs, particularly tannery effluents. Obviously, the concentrations measured at these locations are above all environmental quality standards. Pollutant loads are very heavy in the Sebou River and can contaminate the river course for kilometres. Moreover, as the water of the Sebou River is used for the irrigation of vegetables, serious problems of public health could arise. A better understanding of contaminant dynamics and self-purifying processes in these rivers will help implement actions and steps aimed at improving water quality in the Sebou River, which is the primary water supply source in Morocco and is used for agricultural and industrials purposes as well as for drinking water.

  16. Analysis of Aquifer Response, Groundwater Flow, and PlumeEvolution at Site OU 1, Former Fort Ord, California

    Energy Technology Data Exchange (ETDEWEB)

    Jordan, Preston D.; Oldenburg, Curtis M.; Su, Grace W.

    2005-02-24

    This report presents a continuation from Oldenburg et al. (2002) of analysis of the hydrogeology, In-Situ Permeable Flow Sensor (ISPFS) results, aquifer response, and changes in the trichloroethylene (TCE) groundwater plume at Operational Unit 1 (OU 1) adjacent to the former Fritzsche Army Airfield at the former Fort Ord Army Base, located on Monterey Bay in northern Monterey County. Fuels and solvents were burned on a portion of OU 1 called the Fire Drill Area (FDA) during airport fire suppression training between 1962 and 1985. This activity resulted in soil and groundwater contamination in the unconfined A-aquifer. In the late 1980's, soil excavation and bioremediation were successful in remediating soil contamination at the site. Shortly thereafter, a groundwater pump, treat, and recharge system commenced operation. This system has been largely successful at remediating groundwater contamination at the head of the groundwater plume. However, a trichloroethylene (TCE) groundwater plume extends approximately 3000 ft (900 m) to the northwest away from the FDA. In the analyses presented here, we augment our prior work (Oldenburg et al., 2002) with new information including treatment-system totalizer data, recent water-level and chemistry data, and data collected from new wells to discern trends in contaminant migration and groundwater flow that may be useful for ongoing remediation efforts. Some conclusions from the prior study have been modified based on these new analyses, and these are pointed out clearly in this report.

  17. Ion sound instability driven by ion beam

    CERN Document Server

    Koshkarov, O; Kaganovich, I D; Ilgisonis, V I

    2014-01-01

    In many natural and laboratory conditions, plasmas are often in the non-equilibrium state due to presence of stationary flows, when one particle species (or a special group, such as group of high energy particles, i.e. beam) is mowing with respect to the other plasma components. Such situations are common for a number of different plasma application such as diagnostics with emissive plasma probes, plasma electronics devices and electric propulsion devices. The presence of plasma flows often lead to the instabilities in such systems and subsequent development of large amplitude perturbations. The goal of this work is to develop physical insights and numerical tools for studies of stability of the excitation of the ion sound waves by the ion beam in the configuration similar to the plasma Pierce diode. This systems, in some limiting cases, reduce to mathematically similar equations originally proposed for Pierce instability. The finite length effect are crucial for this instability which generally belong to the...

  18. Instruments used to measure or check {alpha}, {beta}, {gamma} activity and neutron emission in the course of processing ore or irradiated fuel; Appareils de mesure ou de controle {alpha}, {beta}, {gamma}, n, des circuits des usines de traitement du minerai ou du combustible irradie

    Energy Technology Data Exchange (ETDEWEB)

    Blanc, A.; Brunet, M.; Kermagoret, M.; Labeyrie, J.; Roux, G.; Vasseur, J.; Weil, J. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1959-07-01

    echangeurs d'ions, sur la concentration du plutonium et des produits de fission dans les differents circuits, et sur la radioactivite des effluents rejetes par l'usine dans les cours d'eau. Le controle des operations de fixation et d'elution de l'uranium est effectue automatiquement par un appareil qui preleve, evapore et mesure l'activite {alpha} de 5 cm{sup 3} de solution toutes les 10 ou 20 minutes. Les teneurs en plutonium sont mesurees: - en presence de fortes activites {beta} {gamma} par des detecteurs {alpha} a cylindres tournants; - en presence de faibles activites {beta} {gamma} par des detecteurs {alpha} examinant une surface liquide a niveau constant; - par des chambres a fission peu sensibles aux {gamma}. Les teneurs en produits de fission sont mesurees par des chambres, compteurs, ou scintillateurs, selon l'importance de l'activite {gamma}. Enfin, le controle de l'activite des effluents a rejeter dans les cours d'eau est realise par un appareil a scintillation mesurant l'activite {alpha} d'une part et, d'autre part l'activite {alpha} {gamma} des residus d'un echantillon de 100 cm{sup 3} preleve et evapore en 20 minutes. (auteur)

  19. Ion specificities of artificial macromolecules.

    Science.gov (United States)

    Liu, Lvdan; Kou, Ran; Liu, Guangming

    2016-12-21

    Artificial macromolecules are well-defined synthetic polymers, with a relatively simple structure as compared to naturally occurring macromolecules. This review focuses on the ion specificities of artifical macromolecules. Ion specificities are influenced by solvent-mediated indirect ion-macromolecule interactions and also by direct ion-macromolecule interactions. In aqueous solutions, the role of water-mediated indirect ion-macromolecule interactions will be discussed. The addition of organic solvents to aqueous solutions significantly changes the ion specificities due to the formation of water-organic solvent complexes. For direct ion-macromolecule interactions, we will discuss specific ion-pairing interactions for charged macromolecules and specific ion-neutral site interactions for uncharged macromolecules. When the medium conditions change from dilute solutions to crowded environments, the ion specificities can be modified by either the volume exclusion effect, the variation of dielectric constant, or the interactions between ions, macromolecules, and crowding agents.

  20. Trapping radioactive ions

    CERN Document Server

    Kluge, Heinz-Jürgen

    2004-01-01

    Trapping devices for atomic and nuclear physics experiments with radioactive ions are becoming more and more important at accelerator facilities. While about ten years ago only one online Penning trap experiment existed, namely ISOLTRAP at ISOLDE/CERN, meanwhile almost every radioactive beam facility has installed or plans an ion trap setup. This article gives an overview on ion traps in the operation, construction or planing phase which will be used for fundamental studies with short-lived radioactive nuclides such as mass spectrometry, laser spectroscopy and nuclear decay spectroscopy. In addition, this article summarizes the use of gas cells and radiofrequency quadrupole (Paul) traps at different facilities as a versatile tool for ion beam manipulation like retardation, cooling, bunching, and cleaning.

  1. [Particle therapy: carbon ions].

    Science.gov (United States)

    Pommier, Pascal; Hu, Yi; Baron, Marie-Hélène; Chapet, Olivier; Balosso, Jacques

    2010-07-01

    Carbon ion therapy is an innovative radiation therapy. It has been first proposed in the forties by Robert Wilson, however the first dedicated centres for human care have been build up only recently in Japan and Germany. The interest of carbon ion is twofold: 1) the very sharp targeting of the tumour with the so called spread out Bragg peak that delivers most of the beam energy in the tumour and nothing beyond it, sparing very efficiently the healthy tissues; 2) the higher relative biological efficiency compared to X rays or protons, able to kill radioresistant tumour cells. Both properties make carbon ions the elective therapy for non resectable radioresistant tumours loco-regionally threatening. The technical and clinical experience accumulated during the recent decades is summarized in this paper along with a detailed presentation of the elective indications. A short comparison between conventional radiotherapy and hadrontherapy is proposed for the indications which are considered as priority for carbon ions.

  2. Ion exchange phenomena

    Energy Technology Data Exchange (ETDEWEB)

    Bourg, I.C.; Sposito, G.

    2011-05-01

    Ion exchange phenomena involve the population of readily exchangeable ions, the subset of adsorbed solutes that balance the intrinsic surface charge and can be readily replaced by major background electrolyte ions (Sposito, 2008). These phenomena have occupied a central place in soil chemistry research since Way (1850) first showed that potassium uptake by soils resulted in the release of an equal quantity of moles of charge of calcium and magnesium. Ion exchange phenomena are now routinely modeled in studies of soil formation (White et al., 2005), soil reclamation (Kopittke et al., 2006), soil fertilitization (Agbenin and Yakubu, 2006), colloidal dispersion/flocculation (Charlet and Tournassat, 2005), the mechanics of argillaceous media (Gajo and Loret, 2007), aquitard pore water chemistry (Tournassat et al., 2008), and groundwater (Timms and Hendry, 2007; McNab et al., 2009) and contaminant hydrology (Chatterjee et al., 2008; van Oploo et al., 2008; Serrano et al., 2009).

  3. Sensing with Ion Channels

    CERN Document Server

    Martinac, Boris

    2008-01-01

    All living cells are able to detect and translate environmental stimuli into biologically meaningful signals. Sensations of touch, hearing, sight, taste, smell or pain are essential to the survival of all living organisms. The importance of sensory input for the existence of life thus justifies the effort made to understand its molecular origins. Sensing with Ion Channels focuses on ion channels as key molecules enabling biological systems to sense and process the physical and chemical stimuli that act upon cells in their living environment. Its aim is to serve as a reference to ion channel specialists and as a source of new information to non specialists who want to learn about the structural and functional diversity of ion channels and their role in sensory physiology.

  4. Atomic negative ions

    Energy Technology Data Exchange (ETDEWEB)

    Brage, T.

    1991-12-31

    We review some of the recent progress in the studies of alkaline-earth, negative ions. Computations of autodetachment rates, electron affinities and transition wavelengths are discussed and some new and improved results are given.

  5. Atomic negative ions

    Energy Technology Data Exchange (ETDEWEB)

    Brage, T.

    1991-01-01

    We review some of the recent progress in the studies of alkaline-earth, negative ions. Computations of autodetachment rates, electron affinities and transition wavelengths are discussed and some new and improved results are given.

  6. Ion exchange equilibrium constants

    CERN Document Server

    Marcus, Y

    2013-01-01

    Ion Exchange Equilibrium Constants focuses on the test-compilation of equilibrium constants for ion exchange reactions. The book first underscores the scope of the compilation, equilibrium constants, symbols used, and arrangement of the table. The manuscript then presents the table of equilibrium constants, including polystyrene sulfonate cation exchanger, polyacrylate cation exchanger, polymethacrylate cation exchanger, polysterene phosphate cation exchanger, and zirconium phosphate cation exchanger. The text highlights zirconium oxide anion exchanger, zeolite type 13Y cation exchanger, and

  7. Miniaturized Ion Mobility Spectrometer

    Science.gov (United States)

    Kaye, William J. (Inventor); Stimac, Robert M. (Inventor)

    2015-01-01

    By utilizing the combination of a unique electronic ion injection control circuit in conjunction with a particularly designed drift cell construction, the instantly disclosed ion mobility spectrometer achieves increased levels of sensitivity, while achieving significant reductions in size and weight. The instant IMS is of a much simpler and easy to manufacture design, rugged and hermetically sealed, capable of operation at high temperatures to at least 250.degree. C., and is uniquely sensitive, particularly to explosive chemicals.

  8. Radio frequency ion source

    CERN Document Server

    Shen Guan Ren; Gao Fu; LiuNaiYi

    2001-01-01

    The study on Radio Frequency Ion Source is mainly introduced, which is used for CIAE 600kV ns Pulse Neutron Generator; and obtained result is also presented. The RF ion source consists of a diameter phi 25 mm, length 200 mm, coefficient of expansion =3.5 mA, beam current on target >=1.5 mA, beam spot =100 h.

  9. 2010 ion run: completed!

    CERN Multimedia

    CERN Bulletin

    2010-01-01

    After a very fast switchover from protons to lead ions, the LHC has achieved performances that allowed the machine to exceed both peak and integrated luminosity by a factor of three. Thanks to this, experiments have been able to produce high-profile results on ion physics almost immediately, confirming that the LHC was able to keep its promises for ions as well as for protons.   First direct observation of jet quenching. A seminar on 2 December was the opportunity for the ALICE, ATLAS and CMS collaborations to present their first results on ion physics in front of a packed auditorium. These results are important and are already having a major impact on the understanding of the physics processes that involve the basic constituents of matter at high energies. In the ion-ion collisions, the temperature is so high that partons (quarks and gluons), which are usually constrained inside the nucleons, are deconfined to form a highly dense and hot soup known as quark-gluon plasma (QGP). The existence of ...

  10. La cimenterie de Temara : besoins d’un nouveau gisement de calcaires (cas du gisement de l’oued Cherrat The cement Temara: needs a new deposit of limestone (case the deposit of oued Cherrat

    Directory of Open Access Journals (Sweden)

    Kharchof A.El.K.

    2012-09-01

    Full Text Available Au cours de ces dernières années, Asment Temara a eu recourt uniquement aux calcaires de l’ancienne carrière (Asment pour la fabrication de son ciment, dont elle utilise environ 80 %. Cependant, avec l’évolution de l’exploitation de la carrière, la teneur moyenne en CaO a chuté, en outre l’usage du crible au niveau du concasseur primaire a conduit à une consommation accrue de calcaire. Cette situation a obligé Asment Temara de lancer une campagne de prospection pour la recherche d’une nouvelle carrière de calcaire dans la banlieue du site principal. Cette quête s’est montrée fructueuse par la découverte d’un nouveau gisement qui est celui de l’oued Cherrat. l’étude de ce gisement nous a permis de distinguer trois lithologies : calcaires francs, calcaires dolomitiques et faciès de transition (calcaires à interlits schisteux. Les données de sondages et la cartographie de surface nous ont permis d’estimer les réserves de ce gisement, qui sont de l’ordre de 22712213 millions de tonnes. Les mélanges réalisés au cours de ce travail nous amène à déduire qu’il s’avère nécessaire d’utiliser le calcaire de l’oued Cherrat pour prolonger la durée de vie de la carrière d’Asment, et de là, satisfaire les besoins du marché. During recent years, Asment Temara had recourse only to the former limestone quarry (Asment for the manufacture of its cement, which it uses about 80%. However, with the evolution of the quarry exploitation, the average content of CaO dropped; the use of riddle at the primary crusher has led to increased consumption of limestone. Between 14 to 20% of the raw material is rejected for eliminate particle size fractions of less than 10mm and which are rich in SiO2. This situation has reduce the life of the quarry, which oblige Asment Temara to search a new limestone quarry. This search has proved fruitful with the discovery of a new field which is oued Cherrat. The detailed study of

  11. Perfil fermentativo de silagens de cana-de-açúcar in natura ou queimada e tratadas ou não com Lactobacillus buchneri Fermentative profile of silage of fresh or burned sugarcane treated or not with L. buchneri

    Directory of Open Access Journals (Sweden)

    Gustavo Rezende Siqueira

    2011-08-01

    Full Text Available Objetivou-se comparar as perdas, a dinâmica microbiológica e as alterações fermentativas e nutritivas de silagens de cana-de-açúcar in natura ou queimada e tratadas ou não com Lactobacillus buchneri durante o período de armazenamento. Os tratamentos foram cana-de-açúcar in natura ou tratada com L. buchneri e cana-de-açúcar queimada ou tratada com L. buchneri, avaliadas com 0, 1, 4, 7, 14, 28 e 56 dias de fermentação, em três repetições por tratamento. Apenas antes da ensilagem foi constatada diferença significativa na população de leveduras entre cana-de-açúcar in natura e queimada, cujos valores foram de 4,85 e 5,43 log ufc/g de forragem, respectivamente. No decorrer do tempo de fermentação, ocorreu redução da recuperação de matéria seca e as perdas se prolongaram até o dia 56. A concentração de etanol foi alta até o dia 28 e estável até o dia 56, sem diferença entre tratamentos. A digestibilidade verdadeira in vitro da matéria seca sofreu severa redução já no primeiro dia de armazenamento, chegando a reduzir cerca de 20 unidades percentuais aos 56 dias de armazenamento. Silagens de cana-de-açúcar queimada apresentam maiores perdas e alterações fermentativas e nutricionais que silagens de cana-de-açúcar in natura. O L. buchneri deve ser utilizado em silagens de cana-de-açúcar queimada, mas nas de cana-de-açúcar in natura seu uso é dispensável.The objective of this work was to compare losses, microbiological dynamics and nutritional and fermentative alterations in silages of fresh or burned sugar cane treated or not with Lactobacillus buchneri during storage period. Treatments were fresh sugar cane or treated with L. buchneri and sugar cane burned or treated with L. buchneri, evaluated with 0, 1, 4, 7, 14, 28 and 56 days of fermentation, in three replicates per treatment. Only before ensiling it was observed significant difference in the yeast population between fresh and burned sugar cane

  12. Vendredi ou Les Limbes du Pacifique: uma nova perspectiva do individualismo moderno na sociedade contemporânea = Vendredi ou Les Limbes du Pacifique: a new perspective of modern individualism in contemporary society

    Directory of Open Access Journals (Sweden)

    Jussara da Silva Rodrigues

    2013-01-01

    Full Text Available Considerado pelo crítico de literatura Ian Watt como um dos ‘mitos do individualismo moderno’, As Aventuras de Robinson Crusoe, de Daniel Defoe (1719, é um livro que exerceu e exerce grande influência no imaginário ocidental. Seu sucesso rendeu-lhe inúmeras reescrituras, conhecidas como ‘robinsoníadas’. Vendredi ou Les Limbes du Pacifique1, escrito em 1967 pelo francês Michel Tournier, é um dos intertextos mais ricos surgidos desde então. A adoção de uma perspectiva completamente nova rompe com o paradigma do homem branco civilizado e dota o texto de originalidade. Na nova versão, o individualismo de Robinson assume um caráter mais condizente com o pensamento da sociedade contemporânea. Este artigo busca, por meio de uma análise comparativa e de um estudo dos símbolos, ressaltar o potencial de Vendredi como mito do individualismo moderno na sociedade contemporânea.Considered by the critic of literature Ian Watt as one of the ‘myths of modern individualism’, The Adventures of Robinson Crusoe by Daniel Defoe (1719 is a book that exerted and exerts great influence in the occidental imagination. Its great success rendered it numerous rewritings, known as robinsonades. Vendredi ou Les Limbes du Pacifique written in 1967 by the French Michel Tournier, is one of the richest intertexts ever emerged since then. The adoption of a completely new perspective breaks with the paradigm of the white civilized man providing the originality of the text. In the new version, the individualism of Robinson gets role more consistent to the contemporary society thought. This article aims to emphasize Vendredi potential as a myth of the modern individualism in contemporary society through its symbols and a comparative analysis.

  13. Mushroom Shiitake, is it mutagenic or antimutagenic agent? Shiitake, um cogumelo mutagênico ou antimutagênico?

    Directory of Open Access Journals (Sweden)

    Ilce Mara de Syllos Cólus

    2001-11-01

    Full Text Available Mushrooms have been consumed by eastern populations due to their edible and medicinal properties, for a long time. Over the years, there has also been a gradual increase in the consumption of mushrooms in the western countries, including Brazil. However, the benefits or harms that these mushrooms may cause to the human health are still uncertain. Shiitake (Lentinula edodes (Berk. Pegler is one of the most appreciated fungi in the Brazilian cuisine and its functional and nutritional properties have been extensively studied. Other characteristics of this basidiomycet have also been reported, including its antitumoral, antiviral, bactericidal properties, as well as being a homeostasis and biorhythm regulator. However, studies regarding its mutagenic and antimutagenic potential in prokaryotic and eukaryotic organisms are scarce. Knowledge of these biological properties is essential before a product can be recommended as food and/or drug. Therefore, its indication as a beneficial product to human health is premature since it is necessary to broaden studies on the mutagenic and antimutagenic activities of the mushroom Shiitake or of its active compounds.   Desde a antigüidade, os cogumelos vêm sendo consumidos pelos povos orientais devido às suas  propriedades medicinais e comestíveis e ao longo dos anos tem-se observado um aumento gradativo no consumo também nos países ocidentais, inclusive o Brasil. No entanto, ainda há dúvidas quanto aos benefícios ou prejuízos à saúde, decorrentes do uso destes cogumelos pelas populações humanas. Entre os cogumelos muito apreciados na culinária brasileira, destaca-se o Shiitake (Lentinula edodes (Berk. Pegler, um dos fungos comestíveis mais estudados quanto às suas propriedades funcionais e nutricionais. Já se tem conhecimento sobre várias atividades deste basidiomiceto superior, como antitumoral, antiviral, bactericida, regulador da homeostase e do biorritmo. No entanto, poucos trabalhos

  14. Consumo e desempenho de cordeiros e borregos alimentados com dietas de alto concentrado de milho ou sorgo

    Directory of Open Access Journals (Sweden)

    R.S. Venturini

    Full Text Available RESUMO Objetivou-se avaliar os consumos de matéria seca, nutrientes e desempenho na terminação de cordeiros e borregos submetidos a dietas de alto concentrado de grão de milho ou sorgo. Foram utilizados 32 animais, sendo 16 cordeiros (dente de leite e 16 borregos (dois dentes da raça Corriedale. As dietas eram constituídas de feno de aveia- branca (Avena sativa, grão de milho (Zea mays ou de sorgo (Sorghum bicolor (L. Moench, farelo de soja (Glycine Max, calcário calcítico, bicarbonato de sódio e monensina. Os cordeiros apresentaram superioridade (P≤0,05 quanto ao CMS (% do PV e g/kg PV0,75, ao CPB (kg/dia, % do PV e g/kg PV0,75, ao CEE (% do PV, ao CFDN e ao CFDA (% do PV e g/kg PV0,75, ao CNDT (% do PV, ao ganho de peso médio diário, à conformação in vivo e à conversão alimentar. Por outro lado, o CEE, o CCHT e o CCNE (kg/dia, o peso vivo inicial, o peso vivo final e o peso vivo ao abate foram superiores (P≤0,05 na categoria dos borregos. Em relação aos grãos avaliados, verificou-se maior (P≤0,05 CEE (kg/dia, % do PV e g/kg PV0,75 e menor (P≤0,05 CFDN (% do PV e CFDA (kg/dia, % do PV e g/kg PV0,75 para os animais alimentados com dieta de alto concentrado à base de grão de milho em relação àqueles alimentados com grão de sorgo. Os cordeiros apresentam consumos relativos superiores aos borregos, porém sua resposta zootécnica é maior. O uso de dietas de alto concentrado de sorgo ou de milho proporcionou resultados semelhantes.

  15. Ion-selective electrode reviews

    CERN Document Server

    Thomas, J D R

    1983-01-01

    Ion-Selective Electrode Reviews, Volume 5 is a collection of articles that covers ion-speciation. The book aims to present the advancements of the range and capabilities of selective ion-sensors. The topics covered in the selection are neutral carrier based ion-selective electrodes; reference electrodes and liquid junction effects in ion-selective electrode potentiometry; ion transfer across water/organic phase boundaries and analytical; and carbon substrate ion-selective electrodes. The text will be of great use to chemists and chemical engineers.

  16. Repercussões otorrinolaringológicas do abuso de cocaína e/ou crack em dependentes de drogas

    Directory of Open Access Journals (Sweden)

    Nassif Filho A.C.N.

    1999-01-01

    Full Text Available A prevalência de pacientes viciados em cocaína e/ou crack parece estar aumentando; portanto, o médico deve estar preparado para diagnosticar o uso de drogas. OBJETIVOS. Determinar se existem sinais típicos de uso de cocaína e/ou crack no trato respiratório superior ou na orofaringe em exame otorrinolaringológico comum. Orientar o médico no diagnóstico dos pacientes viciados nessas drogas. MÉTODOS. Foram estudados 18 pacientes viciados em cocaína e/ou crack, que estavam internados em clínica psiquiátrica, através de anamnese e exame otorrinolaringológico simples (rinoscopia anterior e orofaringoscopia. RESULTADOS. Foi impossível estabelecer uma correlação entre o tempo de uso, quantidade e freqüência no uso das drogas quanto aos sintomas e exame otorrinolaringológico. CONCLUSÃO. Devido à inespecíficidade no exame otorrinolaringológico do paciente viciado em cocaína e/ou crack, é necessário que o médico suspeite do abuso de drogas na história clínica; caso contrário, poderá não realizar este importante diagnóstico.

  17. Ion-selective electrode reviews

    CERN Document Server

    Thomas, J D R

    1985-01-01

    Ion-Selective Electrode Reviews, Volume 7 is a collection of papers that covers the applications of electrochemical sensors, along with the versatility of ion-selective electrodes. The coverage of the text includes solid contact in membrane ion-selective electrodes; immobilized enzyme probes for determining inhibitors; potentiometric titrations based on ion-pair formation; and application of ion-selective electrodes in soil science, kinetics, and kinetic analysis. The text will be of great use to chemists and chemical engineers.

  18. Operation of ECR Ion Source

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    In 2001, ECR ion source was operated for HIRFL about 5138 hours and 8 species of ion beams, such as ~(12)C~(4+), ~(12)C~(5+), ~(36)Ar~(11+),~(13)C~(4+),~(40)Ca~(11+),~(40)Ar~(11+),~(56)Fe~(10+) and ~(18)O~(6+) were provided. Among these ions,~(56)Fe~(10+)is a new ion beam. In this period, 14 experiments of heavy ion physics application and nuclear research were finished.

  19. Da ideia de infância em Jean-Jacques Rousseau ou do "sono da razão"

    OpenAIRE

    Grumiché, Mônica Cristina Dutra

    2012-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias da Educação. Programa de Pós-Graduação em Educação Os pensamentos expostos no século XVIII pelo genebrino Jean-Jacques Rousseau influenciaram de maneira decisiva a forma como o Ocidente passou a perceber a infância. Este autor provocou uma verdadeira divisão de águas ao publicar Emílio ou Da Educação (1762). Com este feito, mais que balançar os alicerces educacionais da época, ele delega à criança um lugar ...

  20. INTEGRATED MANAGEMENT OF WATER RESOURCES IN THE VALLEY OF OUED-SOUF (ALGERIA: ISSUES FITNESS FOR A NEW STRATEGY

    Directory of Open Access Journals (Sweden)

    S. Khechana

    2010-12-01

    Full Text Available This study designed to analyze and evaluate the results of trend scenarios of the strategy management of water resources used in the valley of Oued-Souf, who led the region to a truly dramatic situation and almost desperate: rise of groundwater and its adverse consequences. In terms of this work, we seek a model (plan for the development of these resources according to criteria of sustainability, and will take into account socio-economic and ecosystem aspect. That by adaptation and implementation of integrated management of water resources (IMWR in this unit of water resources, to meet the needs of decision support in water management, so as to guide and mobilize progressive human resources, information, financial and material, as well as various private and public sectors towards finding concrete and measurable results of water and ecosystems.

  1. INTEGRATED MANAGEMENT OF WATER RESOURCES IN THE VALLEY OF OUED-SOUF (ALGERIA: ISSUES FITNESS FOR A NEW STRATEGY

    Directory of Open Access Journals (Sweden)

    S. Khechana

    2015-08-01

    Full Text Available This study designed to analyze and evaluate the results of trend scenarios of the strategy management of water resources used in the valley of Oued-Souf, who led the region to a truly dramatic situation and almost desperate: rise of groundwater and its adverse consequences. In terms of this work, we seek a model (plan for the development of these resources according to criteria of sustainability, and will take into account socio-economic and ecosystem aspect. That by adaptation and implementation of integrated management of water resources (IMWR in this unit of water resources, to meet the needs of decision support in water management, so as to guide and mobilize progressive human resources, information, financial and material, as well as various private and public sectors towards finding concrete and measurable results of water and ecosystems.

  2. Propostas pedagógicas ou curriculares: subsídios para uma leitura crítica

    Directory of Open Access Journals (Sweden)

    Luciane Ribeiro Vilela

    2000-01-01

    Full Text Available O presente trabalho busca apresentar uma alternativa de análise e construção de currículo e está baseado em pesquisas na área, tendo o objetivo de subsidiar a análise crítica de propostas pedagógicas ou curriculares. O texto é orientado pela teoria crítica da cultura e a autora parte do pressuposto de que toda proposta pedagógica é expressão de um projeto político e cultural. This paper intend to find a way to show a alternative of analysis and construction of curriculum, based in search in this area, having as purpose to aid critical analysis of pedagogical proposes. This text is oriented by critical theory of culture and the author begin assuming that all pedagogical proposes are expression of a political and cultural project.

  3. Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect.

    Science.gov (United States)

    Ulanov, Alexander E; Fedorov, Ilya A; Sychev, Demid; Grangier, Philippe; Lvovsky, A I

    2016-06-21

    Highly entangled quantum states, shared by remote parties, are vital for quantum communications and metrology. Particularly promising are the N00N states-entangled N-photon wavepackets delocalized between two different locations-which outperform coherent states in measurement sensitivity. However, these states are notoriously vulnerable to losses, making them difficult to both share them between remote locations and recombine in order to exploit interference effects. Here we address this challenge by utilizing the reverse Hong-Ou-Mandel effect to prepare a high-fidelity two-photon N00N state shared between two parties connected by a lossy optical medium. We measure the prepared state by two-mode homodyne tomography, thereby demonstrating that the enhanced phase sensitivity can be exploited without recombining the two parts of the N00N state. Finally, we demonstrate the application of our method to remotely prepare superpositions of coherent states, known as Schrödinger's cat states.

  4. Auriol, ou de l'usage romantique du clown : Gautier, Banville, Baudelaire et le rire du cirque

    OpenAIRE

    Bara, Olivier

    2012-01-01

    International audience; Le clown sauteur, jongleur, acrobate (sur chaises, échasses ou bouteilles), écuyer, danseur de corde Jean-Baptiste Auriol (1806-1881) se produit au Cirque-Olympique et au Cirque des Champs-Élysées de juillet 1834 à 1852, avant d'être détrôné au début du Second Empire par la vogue des clowns anglais : telle est la présentation la plus sûre que l'on puisse donner de l'artiste de cirque, soumis très vite, de son vivant, aux constructions légendaires et aux mythographies m...

  5. La progression de l’absentéisme : nouveaux comportements des salariés ou nouvelles contraintes organisationnelles ?

    OpenAIRE

    Bouville, Gregor

    2010-01-01

    A partir des données de la CNAM, nous constatons une progression de l’absentéisme en France, mesuré par le nombre d’indemnités journalières maladie, depuis la fin des années 1990. Faut-il y voir le signe d’un développement des comportements de retrait des salariés français ou bien l’interpréter comme étant la conséquence de l’émergence de nouvelles contraintes organisationnelles ? Pour répondre à cette question de recherche, nous réaliserons une analyse quantitative à partir des données de l’...

  6. Miocardiopatia preponderante de ventrículo direito por miocardite prévia ou por displasia arritmogênica?

    Directory of Open Access Journals (Sweden)

    Atik Edmar

    2005-01-01

    Full Text Available É relatado o caso clínico de um paciente do sexo masculino com 10 anos de idade, cuja miocardiopatia dilatada e preponderante de ventrículo direito apresenta dificuldades diagnósticas entre a etiologia de miocardite prévia e a displasia arritmogênica. Como os elementos não são patognomônicos de uma ou de outra causa, a elevação de enzimas cardíacas na fase subaguda talvez incline para a suposição de miocardite prévia. Daí, o questionamento de que muitos casos rotulados como displasia arritmogênica poderem, verdadeiramente, corresponder à possibilidade de miocardite evolutiva. A controvertida conduta clínica é discutida.

  7. Liu Na’ou And The 1930s Soft Film Movement: A New Approach In Revisionist Chinese Film Historiography

    Directory of Open Access Journals (Sweden)

    Donna Ong

    2013-06-01

    Full Text Available This essay analyzes how the 1930s Chinese “Soft Film” movement emerged and developed in film historiography, and finds it is a discursive formation by the Leftists to create an ideological enemy that serves to define its own group’s identity through a struggle against an “other”. It challenges the naming of “Soft Film” through examining documents beyond the official archive. Unearthing the film writings of Liu Na’ou as the movement’s leading figure is a good entry point into excavating the history of the people and films associated with the label “Soft Film”. Reconstructing this “reactionary cinema” will reveal previously unknown cultural connections with classical and avant-garde Western film theories, and more importantly renovate the established Chinese film canon of the 1930s.

  8. Enseignants de L2 natifs ou non natifs: quelles différences pour l'enseignement ?

    OpenAIRE

    Lauper, Sandrine; Mihelčić, Marijana; Thonhauser, Ingo

    2016-01-01

    Quel est le profil idéal d’un enseignant de langue étrangère (L2) ? Doit-il à tout prix être natif de la langue enseignée pour pouvoir la transmettre de manière optimale ? Quel niveau de maîtrise de la langue doit-il avoir ? Un ou plusieurs séjours linguistiques sont-ils indispensables ? Dans quelle mesure l’aisance en L2 joue-t-elle un rôle lors de l’enseignement de cette dernière ? Voici, dans les grandes lignes, toutes les questions que nous nous posions et auxquelles nous étions désireuse...

  9. Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect

    Science.gov (United States)

    Ulanov, Alexander E.; Fedorov, Ilya A.; Sychev, Demid; Grangier, Philippe; Lvovsky, A. I.

    2016-06-01

    Highly entangled quantum states, shared by remote parties, are vital for quantum communications and metrology. Particularly promising are the N00N states--entangled N-photon wavepackets delocalized between two different locations--which outperform coherent states in measurement sensitivity. However, these states are notoriously vulnerable to losses, making them difficult to both share them between remote locations and recombine in order to exploit interference effects. Here we address this challenge by utilizing the reverse Hong-Ou-Mandel effect to prepare a high-fidelity two-photon N00N state shared between two parties connected by a lossy optical medium. We measure the prepared state by two-mode homodyne tomography, thereby demonstrating that the enhanced phase sensitivity can be exploited without recombining the two parts of the N00N state. Finally, we demonstrate the application of our method to remotely prepare superpositions of coherent states, known as Schrödinger's cat states.

  10. Performing Hong-Ou-Mandel-type numerical experiments with repulsive condensates: The case of dark and dark-bright solitons

    Science.gov (United States)

    Sun, Zhi-Yuan; Kevrekidis, Panayotis G.; Krüger, Peter

    2016-12-01

    The Hong-Ou-Mandel experiment leads indistinguishable photons simultaneously reaching a 50:50 beam splitter to emerge on the same port through a two-photon interference. Motivated by this phenomenon, we consider numerical experiments of the same flavor for classical wave objects in the setting of repulsive condensates. We examine dark solitons interacting with a repulsive barrier, a case in which we find no significant asymmetries in the emerging waves after the collision, presumably due to their topological nature. We also consider case examples of two-component systems, where the dark solitons trap a bright structure in the second component (dark-bright solitary waves). For these, pronounced asymmetries upon collision are possible for the nontopological bright component. We also show an example of a similar phenomenology for ring dark-bright structures in two dimensions.

  11. Sartre, en l’année de son centenaire : mauvais maître ou boussole éthique ?

    Directory of Open Access Journals (Sweden)

    Annie Cohen-Solal

    2007-06-01

    Full Text Available En France, peu de centenaires ont fait l’objet, comme celui de Sartre en 2005, d’une aussi négative unanimité. Hormis Les Temps Modernes et Libération (dont il fut le fondateur, pratiquement toute la presse colporta les mêmes clichés, en le stigmatisant en mauvais maître, en penseur démodé ou encore en imposteur. Le magazine L’Histoire reprit de vieilles insinuations, sans fondement scientifique, sur les occupations du philosophe pendant l’occupation nazie. Le Nouvel Observateur poursuivit la salve, avec le titre accrocheur de « Faut‐il brûler Sartre ? »

  12. Chemistry Wastewater Treatment of El-Oued City (South-East of Algeria by Utilization of Typha Latifolia

    Directory of Open Access Journals (Sweden)

    Zeghdi Saad

    2016-12-01

    Full Text Available The objective of this study is to show the potential of Typha latifolia in the Purification performance of wastewater in the region of El Oued (southeast of Algeria. The pilot scale consists of two beds of plastics, filled with gravel and sand. One was planted saplings Typha latifolia at 36 stems/m2, the second was not planted serves as a control (witness. The results show good yields for suspended solids and organic pollution, removal rates are 96,76% for (SS 89,92% for the Chemical Oxygen Demand (COD and 87, 98% for biochemical oxygen demand in 5 days (BOD5. There is a clear increase in the concentration of dissolved oxygen (DO. The system effectively removes nitrite (88.84%, nitrate (91.20%, and orthophosphate (93.12%.

  13. Patrimoine hospitalier à travers l’Europe : un dilemme entre restructuration ou désaffectation

    Directory of Open Access Journals (Sweden)

    Pierre-Louis Laget

    2012-04-01

    Full Text Available L’Assistance publique/Hôpitaux de Paris prit l’initiative de lancer, au cours de l’année 2000, un projet d’étude européen sur les édifices hospitaliers. Elle s’associa dans cette perspective avec l’Inventaire général (ministère de la Culture afin d’y trouver les ressources humaines et scientifiques qui lui faisaient partiellement défaut. Plusieurs pays européens ou régions dont la Belgique (région de Bruxelles capitale, l’Espagne (Catalogne, la Grande–Bretagne, l’Italie (région d’Emilie–Ro...

  14. Asie du Sud-Est : enjeu régional ou enjeu mondial ?, Hugues Tertrais

    Directory of Open Access Journals (Sweden)

    Laurent Gédéon

    2013-01-01

    Full Text Available Dans Asie du Sud-Est : enjeu régional ou enjeu mondial ?, Hugues Tertrais se livre à une analyse précise de la situation en Asie du sud-est au regard de la crise économique qui a secoué cette région du monde en 1997 et de ses conséquences. Soulignant la fragmentation de cet espace politique, caractérisé par sa très grande diversité culturelle et linguistique, l’auteur rappelle qu’il s’est édifié sur l’ancienne ligne de fracture entre monde chinois et puissances européennes, tout d’abord, puis...

  15. Clues From Pluto's Ions

    Science.gov (United States)

    Kohler, Susanna

    2016-05-01

    Nearly a year ago, in July 2015, the New Horizons spacecraft passed by the Pluto system. The wealth of data amassed from that flyby is still being analyzed including data from the Solar Wind Around Pluto (SWAP) instrument. Recent examination of this data has revealedinteresting new information about Plutos atmosphere and how the solar wind interacts with it.A Heavy Ion TailThe solar wind is a constant stream of charged particles released by the Sun at speeds of around 400 km/s (thats 1 million mph!). This wind travels out to the far reaches of the solar system, interacting with the bodies it encounters along the way.By modeling the SWAP detections, the authors determine the directions of the IMF that could produce the heavy ions detected. Red pixels represent IMF directions permitted. No possible IMF could reproduce the detections if the ions are nitrogen (bottom panels), and only retrograde IMF directions can produce the detections if the ions are methane. [Adapted from Zirnstein et al. 2016]New Horizons data has revealed that Plutos atmosphere leaks neutral nitrogen, methane, and carbon monoxide molecules that sometimes escape its weak gravitational pull. These molecules become ionized and are subsequently picked up by the passing solar wind, forming a tail of heavy ions behind Pluto. The details of the geometry and composition of this tail, however, had not yet been determined.Escaping MethaneIn a recent study led by Eric Zirnstein (Southwest Research Institute), the latest analysis of data from the SWAP instrument on board New Horizons is reported. The team used SWAPs ion detections from just after New Horizons closest approach to Pluto to better understand how the heavy ions around Pluto behave, and how the solar wind interacts with Plutos atmosphere.In the process of analyzing the SWAP data, Zirnstein and collaborators first establish what the majority of the heavy ions picked up by the solar wind are. Models of the SWAP detections indicate they are unlikely

  16. De l'injure en pays maure ou « qui ne loue pas critique »

    Directory of Open Access Journals (Sweden)

    Catherine Taine-Cheikh

    2009-05-01

    Full Text Available Catherine Taine-Cheikh, qui s'intéresse au phénomène de l'injure dans la société arabophone de Mauritanie, commence par étudier les différents termes du dialecte hassâniyya qui relèvent de ce champ sémantique. Elle s'attache ensuite à montrer l'importance et la complexité de l'« effet injure », dans cette société fortement imprégnée par les valeurs de l'honneur où non seulement la critique mais aussi la louange peuvent apparaître comme des manifestations de l'injure. Passant en revue diverses situations empruntées à la vie quotidienne ou puisées dans des matériaux littéraires (écrits et surtout oraux, l'auteur relève diverses stratégies adoptées, soit par les injurieurs, soit par les injuriaires, pour tenter de maîtriser les effets des mots (ou gestes « déplacés ». Bien que le problème du contrôle de soi semble presque toujours primordial, la gestion de l'injure laisse apparaître une différenciation importante en fonction du sexe et du statut relatif des acteurs sociaux concernés.

  17. COMPATIBILIZAÇÃO DE PROJETOS OU ENGENHARIA SIMULTÂNEA: QUAL É A MELHOR SOLUÇÃO?

    Directory of Open Access Journals (Sweden)

    Jorge MIKALDO Jr

    2008-06-01

    Full Text Available Os empreendimentos imobiliários são produtos da indústria da construção civil que conta com incorporadores, investidores, projetistas, construtores e outros, para realizar os sonhos de famílias, ou melhor, de toda uma comunidade. Portanto, se faz necessário o estudo de ferramentas e técnicas para aperfeiçoar o desenvolvimento deste tipo de produto, que conforme se verifica na literatura, possui características únicas e é passível de falhas na sua execução. Este artigo faz referência a estudos de casos e apresenta resultados da utilização do processo de compatibilização de projetos de edificações em 2D e 3D e do desenvolvimento integrado dos projetos, ou seja, do enfoque de engenharia simultânea. Palavras-chaves: Compatibilização de Projetos, Engenharia Simultânea, TI. DESIGN COMPATIBILIZATION OR CONCURRENT ENGINEERING: WHICH ONE IS THE BEST SOLUTION? ABSTRACT The real estate industry involves market analysts, investors, designers, construction companies and contractors, with the common objective of achieving the consumer market wills. Thus, it is required to study tools and techniques to enhance the development of this product, which as it appears in literature, it is a product with unique features and liable for flaws in its implementation. This article refers to case studies which presents results of building design harmonization in 2D and 3D, and the integrated development of building design tasks as a simultaneous engineering approach. Keywords: Building Design Harmonization, Simultaneous Engineering, IT.

  18. Ajustamento da criança à separação ou divórcio dos pais

    Directory of Open Access Journals (Sweden)

    Hélder Silva Raposo

    2011-01-01

    Full Text Available OBJETIVO: O presente artigo procura relacionar e analisar evidências empíricas e teóricas sobre o impacto e os fatores associados ao impacto da separação ou divórcio dos pais no ajustamento da criança. MÉTODO: Realizou-se uma revisão agregativa da literatura, recorrendo às palavras-chave "divorce adjustment", "child divorce" e "divorce impact", nas bases de dados JSTOR, PsycInfo, SciELO e Medline e em livros da especialidade. RESULTADOS: Respostas adaptativas e desadaptativas da criança são descritas, assim como potenciais resultados positivos. São principalmente discutidos os fatores mediadores e moderadores frequentemente referenciados na literatura no impacto da separação ou divórcio dos pais no ajustamento da criança. Entre esses estão: características da criança, problemas financeiros, sintomatologia psicopatológica dos pais, qualidade das práticas parentais e conflito interparental. CONCLUSÃO: Com base nas evidências empíricas e perspectivando o divórcio como uma transição desenvolvimental, levantamos a hipótese de que os problemas de ajustamento apresentados pelas crianças com pais divorciados possam ser mais bem explicados por outros fatores do que pelo divórcio/separação per se. Finalmente assumimos uma inovação conceptual de que essa transição familiar pode significar uma oportunidade de crescimento e de promoção desenvolvimental.

  19. Contribution to the study of pollution of soil and water in Oued El Maleh area (Mohammedia, Morocco)

    Science.gov (United States)

    El hajjaji, Souad; Dahchour, Abdelmalek; Belhsaien, Kamal; Zouahri, Abdelmjid; Moussadek, Rachid; Douaik, Ahmed

    2016-04-01

    In Morocco, diffuse ground and surface water pollution in irrigated areas has caused an increase in the risk of water and soil quality deterioration. This has generated a health and environmental risks. The present study was carried out in the Oued El Maleh region located 65 Km to the south of Rabat on the Moroccan Atlantic coast. It covers a surface area of 310 km2 where agriculture constitutes the main activity of the population. This region is considered as a very important agricultural area, known nationally for its high potential for market gardening. This intensification has been accompanied by an excessive use of agrochemical inputs and poor control of irrigation and drainage. Consequently, salinization phenomena and deterioration of soil structure as well as water are about to create an alarming situation. In order to assess the state of pollution of waters and soil in the region, our study focuses on the determination of physicochemical parameters for the quality of water and soil. The obtained results from sampled wells and surface water show relatively higher values of nitrate and conductivity exceeding Moroccan national standards and revealing net degradation of water quality; therefore the water can be considered not suitable for human consumption and can induce a degradation of soil. The results of the studied soil show that the pH of these soils is weakly to moderately basic; they are usually non-saline with organic matter content moderately filled. Moreover, very high concentrations of nutrients (potassium, phosphorus and nitrogen) were recorded, highlighting poor management fertilizing vegetable crops in the region of Oued El Maleh.

  20. Fansites ou o "consumo da experiência" na mídia contemporânea

    Directory of Open Access Journals (Sweden)

    Laura Graziela Gomes

    2007-12-01

    Full Text Available O presente artigo apresenta resultados de uma pesquisa que pretendeu investigar uma faceta do consumo de mídia contemporâneo, especialmente associado ao uso da tecnologia digital. Para a realização da investigação, escolhi investigar e observar fansites de séries norte-americanas de TV, criados e administrados por fãs brasileiros para discutirem suas séries preferidas, divulgarem-nas, produzirem e trocarem entre si suas fanarts: fanfics, fanvideos, icons ou avatares, banners ou assinaturas e wallpapers. O resultado dessa investigação e observação participante demonstrou que, além de jovens, os participantes desses fansites vêm promovendo mudanças significativas no consumo de mídia. Em 2006, o confronto entre a Polícia Federal, a Associação de Defesa da Propriedade Intelectual (Adepi e o fórum Lost Brasil deixou evidente que esses jovens estavam dispostos a mudar os paradigmas de transmissão televisual no Brasil.This article presents some results of a research about an aspect of contemporary media consumption, especially associated to the use of digital technology. In this investigation were chosen Americans TV drama shows fansites, created and managed by Brazilians fans to discuss and diffuse their dearest shows, produce, show and change their fanarts: fanfics, fanvideos, icons, avatars, banners and wallpapers. The results of the investigation showed that this young people who take part in these fansites are promoting significant changes in media consumption. In 2006 the confrontation between Federal Police, ADEPI and Lost Brasil forum made clear that these fans are prepared to change the standards of TV transmission in Brazil.

  1. Farelo de crambe nas formas in natura ou reduzida em antinutrientes na dieta do jundiá

    Directory of Open Access Journals (Sweden)

    Alexandra Pretto

    2014-04-01

    Full Text Available Este estudo avaliou os efeitos da substituição parcial de farinha de peixe e farinha de carne e ossos por farelo de crambe, sobre o crescimento, enzimas digestivas e parâmetros bioquímicos no jundiá (Rhamdia quelen. Este coproduto agroindustrial foi incluído na alimentação de jundiás na forma in natura ou reduzido em antinutrientes, obtido após a aplicação de tratamento químico ao farelo. A inclusão desses ingredientes foi comparada ao tratamento controle (proteína baseada em farinhas de origem animal durante nove semanas. Crescimento semelhante ao controle foi observado em peixes alimentados com farelo de crambe in natura ou tratado quimicamente na dieta. A inclusão do farelo in natura reduziu a atividade de protease ácida e colesterol plasmático, mas não alterou os parâmetros bioquímicos hepáticos. Menor concentração de glicogênio e glicose no fígado e aumento na aspartato aminotransferase foi encontrada nos peixes alimentados com farelo de crambe tratado, sinalizando uma condição de carência energética. A similar resposta no crescimento, aliada às leves alterações digestivas e metabólicas com o farelo de crambe in natura em relação ao farelo tratado, pode indicar que, no nível de inclusão utilizado, este ingrediente não necessita de um processo prévio para redução de antinutrientes.

  2. Molecular ion photofragment spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Bustamente, S.W.

    1983-11-01

    A new molecular ion photofragment spectrometer is described which features a supersonic molecular beam ion source and a radio frequency octapole ion trap interaction region. This unique combination allows several techniques to be applied to the problem of detecting a photon absorption event of a molecular ion. In particular, it may be possible to obtain low resolution survey spectra of exotic molecular ions by using a direct vibrational predissociation process, or by using other more indirect detection methods. The use of the spectrometer is demonstrated by measuring the lifetime of the O/sub 2//sup +/(/sup 4/..pi../sub u/) metastable state which is found to consist of two main components: the /sup 4/..pi../sub 5/2/ and /sup 4/..pi../sub -1/2/ spin components having a long lifetime (approx. 129 ms) and the /sup 4/..pi../sub 3/2/ and /sup 4/..pi../sub 1/2/ spin components having a short lifetime (approx. 6 ms).

  3. A Multicusp Ion Source for Radioactive Ion Beams

    Science.gov (United States)

    Wutte, D.; Freedman, S.; Gough, R.; Lee, Y.; Leitner, M.; Leung, K. N.; Lyneis, C.; Picard, D. S.; Sun, L.; Williams, M. D.; Xie, Z. Q.

    1997-05-01

    In order to produce a radioactive ion beam of (14)O+, a 10-cm-diameter, 13.56 MHz radio frequency (rf) driven multicusp ion source is now being developed at Lawrence Berkeley National Laboratory. In this paper we describe the specific ion source design and the basic ion source characteristics using Ar, Xe and a 90types of measurements have been performed: extractable ion current, ion species distributions, gas efficiency, axial energy spread and ion beam emittance measurements. The source can generate ion current densities of approximately 60 mA/cm2 . In addition the design of the ion beam extraction/transport system for the actual experimental setup for the radioactive beam line will be presented.

  4. Cassini observations of ion cyclotron waves and ions anisotropy

    Science.gov (United States)

    Crary, F. J.; Dols, V. J.; Cassidy, T. A.; Tokar, R. L.

    2013-12-01

    In Saturn's equatorial, inner magnetosphere, the production of fresh ions in a pick-up distribution generates ion cyclotron waves. These waves are a sensitive indicator of fresh plasma production, but the quantitative relation between wave properties and ionization rates is nontrivial. We present a combined analysis of Cassini MAG and CAPS data, from a variety of equatorial orbits between 2005 and 2012. Using the MAG data, we determine the amplitude and peak frequency of ion cyclotron waves. From the CAPS data we extract the parallel and perpendicular velocity distribution of water group ions. We compare these results with hybrid simulations of the ion cyclotron instability and relate the observed wave amplitudes and ion velocity distributions to the production rate of pickup ions. The resulting relation between wave and plasma properties will allow us to infer ion production rates even at times when no direct ion measurements are available.

  5. [Ion specificity during ion exchange equilibrium in natural clinoptilolite].

    Science.gov (United States)

    He, Yun-Hua; Li, Hang; Liu, Xin-Min; Xiong, Hai-Ling

    2015-03-01

    Zeolites have been widely applied in soil improvement and environment protection. The study on ion specificity during ion exchange equilibrium is of important significance for better use of zeolites. The maximum adsorption capacities of alkali ions during ion exchange equilibrium in the clinoptilolite showed obvious specificity. For alkali metal ions with equivalent valence, the differences in adsorption capacity increased with the decrease of ionic concentration. These results cannot be well explained by the classical theories including coulomb force, ionic size, hydration, dispersion force, classic induction force and surface complexation. We found that the coupling of polarization effects resulted from the quantum fluctuation of diverse alkali metal ions and electric field near the zeolite surface should be the primary reason for specific ion effect during ion exchange in zeolite. The result of this coupling effect was that the difference in the ion dipole moment increased with the increase of surface potential, which further expanded the difference in the adsorption ability between zeolite surface and ions, resulting in different ion exchange adsorption ability at the solid/liquid interface. Due to the high surface charge density of zeolite, ionic size also played an important role in the distribution of ions in the double diffuse layer, which led to an interesting result that distinct differences in exchange adsorption ability of various alkali metal ions were only detected at high surface potential (the absolute value was greater than 0.2 V), which was different from the ion exchange equilibrium result on the surface with low charge density.

  6. Experimental study of particle formation by ion-ion recombination

    Science.gov (United States)

    Nagato, Kenkichi; Nakauchi, Masataka

    2014-10-01

    Particle formation by ion-ion recombination has been studied using an ion-ion recombination drift tube (IIR-DT). IIR-DT uses two DC corona ionizers to produce positive and negative ions at the ends of the drift tube. The ions of different polarity move in opposite directions along the electric field in the drift tube. We observed significant particle formation using ions generated in purified air containing H2O, SO2, and NH3. Particle formation was suppressed when no drift field was applied. We also observed few particles when we used a single discharge (positive or negative only). These results clearly show that particle formation observed in the IIR-DT was caused by nucleation by ion-ion recombination. Positive and negative ion species produced by corona ionizers were investigated using an atmospheric pressure ionization mass spectrometer. The ions involved in the particle formation were suggested to include H3O+(H2O)n and NH4+(H2O)n for positive ions and sulfur-based ions such as SO5-, SO5-NO2, and HSO4- for negative ions.

  7. Technical feasibility of using silver and copper ions electro generated in the microbiological control of cooling systems; Factibilidad tecnica para emplear iones plata y cobre electrogenerados en el control microbiologico de los sistemas de enfriamiento

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Susana M; Martinez Meza, Esteban; Alvarez Gallegos, Alberto [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico)

    2001-07-01

    The objective of this work is to determine the technical feasibility of replacing the chlorine use by another biocida (ionization of silver or copper) non dangerous in cooling waters. This technique of ionization could be used to treat the water of industrial processes in general. The used water came from the make up water of the cooling system of the Thermoelectric Power Station of Valle de Mexico (CTEVM) and residual water of the treatment plants of the Instituto Mexicano de Tecnologia del Agua (IMTA) (Mexican Institute of WaterTechnology) and the Instituto de Investigaciones Electricas (IIE). The three types of water used have similar physical, chemical and biological characteristics. The used methodology was the jar tests and by continuous system. The bacteriological analysis is indicated reaching the conclusion. The metallic systems studied in the establishment of the microbiological control in the residual water and make up water are silver, silver/copper and copper in the concentration intervals of 200 mg/l to 3000 mg/l of silver and 200 mg/l to 1200 mg/l of copper. The experiments performed in the jar tests (closed system) were carried out at two temperatures (25 {+-} 0.5 and 32 {+-} 0.5 ) without pH control; whereas in the continuous system the pH was maintained in the pH interval of 7 to 8 by means of the sulfuric acid addition and a delta temperature of 10 was maintained (27 {+-} 5 ). The pH, the conductivity and the temperature were continuously measured. Graphs are shown on the effect silver/copper ions on the annihilation of total coliform bacteria and fecal coliforms the effect of the concentration of the silver metallic ion is given as a figure on the annihilation of bacteria related to iron. It is possible to conclude that the plant systems studied of silver/copper and copper turned out to be a good alternative with a minimum environmental impact to replace chlorine in the cooling systems. These systems managed microbiologically to lower the

  8. Technical feasibility of using silver and copper ions electro generated in the microbiological control of cooling systems; Factibilidad tecnica para emplear iones plata y cobre electrogenerados en el control microbiologico de los sistemas de enfriamiento

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Susana M; Martinez Meza, Esteban; Alvarez Gallegos, Alberto [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico)

    2001-07-01

    The objective of this work is to determine the technical feasibility of replacing the chlorine use by another biocida (ionization of silver or copper) non dangerous in cooling waters. This technique of ionization could be used to treat the water of industrial processes in general. The used water came from the make up water of the cooling system of the Thermoelectric Power Station of Valle de Mexico (CTEVM) and residual water of the treatment plants of the Instituto Mexicano de Tecnologia del Agua (IMTA) (Mexican Institute of WaterTechnology) and the Instituto de Investigaciones Electricas (IIE). The three types of water used have similar physical, chemical and biological characteristics. The used methodology was the jar tests and by continuous system. The bacteriological analysis is indicated reaching the conclusion. The metallic systems studied in the establishment of the microbiological control in the residual water and make up water are silver, silver/copper and copper in the concentration intervals of 200 mg/l to 3000 mg/l of silver and 200 mg/l to 1200 mg/l of copper. The experiments performed in the jar tests (closed system) were carried out at two temperatures (25 {+-} 0.5 and 32 {+-} 0.5 ) without pH control; whereas in the continuous system the pH was maintained in the pH interval of 7 to 8 by means of the sulfuric acid addition and a delta temperature of 10 was maintained (27 {+-} 5 ). The pH, the conductivity and the temperature were continuously measured. Graphs are shown on the effect silver/copper ions on the annihilation of total coliform bacteria and fecal coliforms the effect of the concentration of the silver metallic ion is given as a figure on the annihilation of bacteria related to iron. It is possible to conclude that the plant systems studied of silver/copper and copper turned out to be a good alternative with a minimum environmental impact to replace chlorine in the cooling systems. These systems managed microbiologically to lower the

  9. Urbis brasiliae ou sobre cidades do Brasil : inserindo assentamentos urbanos do país em investigações configuracionais comparativas

    OpenAIRE

    2006-01-01

    Na interpretação da forma-espaço da cidade, pouco se avançou além da narração historiográfica/sociológica ou descrição de atributos físicos e espaciais. Não que o discurso ou a categorização sejam impróprios, apenas expõe-se a lacuna em outras apreciações que poderiam contribuir para a análise urbana. Este estudo procura preencher o hiato e investiga de maneira específica como a leitura da cidade por sua configuração pode auxiliar em ações reflexivas sobre os espaços urbanos. A amostra é comp...

  10. Le Coran, production littéraire de l’Antiquité tardive ou Mahomet interprète dans le “lectionnaire arabe” de La Mecque*

    OpenAIRE

    Claude Gilliot

    2011-01-01

    Il est traité ici de l’activité exégétique de Mahomet dans certains passages ou dans une partie du vocabulaire du lectionnaire (syriaque : qeryânâ) mecquois (le « Coran » mecquois). En effet Mahomet y apparaît parfois comme interprétant des passages ou des logia d’écritures antérieures qui elles n’étaient pas en arabe. Interpréter doit s’entendre ici dans le double sens que ce verbe a en français : traduire, ou mieux transposer, et expliquer. Cette pratique du targum existait avant lui chez l...

  11. Efeito da criopreservação e/ou da descelularização na matriz extracelular de condutos valvados porcinos

    OpenAIRE

    Wollmann,Luciana Cristina Ferretti de Nazareno; Carlos A. H Laurindo; Francisco Diniz Affonso da COSTA; Moreno,Andréa Novais

    2011-01-01

    O objetivo desse estudo foi avaliar a morfologia de valvas pulmonares porcinas criopreservadas e/ou descelularizadas para determinar uma solução que remova as células, sem promover danos à matriz extracelular. Valvas pulmonares porcinas foram incubadas por 24h em soluções de deoxicolato de sódio 1% e de dodecil sulfato de sódio 0,1% e 0,3%, com ou sem criopreservação adicional. A avaliação foi feita com microscopia óptica (hematoxilina eosina, orceína acética ou Gomori) e por morfometria. A e...

  12. ION-1 technical manual

    Energy Technology Data Exchange (ETDEWEB)

    Halbig, J.K.; Caine, J.C.

    1985-07-01

    The portable gamma-ray and neutron detector electronics (ION-1) gives a digital readout of the current-mode response produced by gamma rays in an ion chamber and of amplification and scaling of pulses received from a neutron detector. The primary application is the measurement of gamma-ray and neutron activity of irradiated reactor fuels stored at a reactor or at a storage pond away from a reactor. ION-1 is the first such instrument to use a design that allows communication of procedures, response, and results between instrument and inspector. It prompts the inspector through procedures, carries out programmed measurement steps, calculates results and error estimates, and performs internal diagnostic checks. This Technical Manual describes adjustment procedures and limited technical information that enable the inspector to troubleshoot at the board level. 5 figs., 10 tabs.

  13. Laser ion source for isobaric heavy ion collider experiment.

    Science.gov (United States)

    Kanesue, T; Kumaki, M; Ikeda, S; Okamura, M

    2016-02-01

    Heavy-ion collider experiment in isobaric system is under investigation at Relativistic Heavy Ion Collider. For this experiment, ion source is required to maximize the abundance of the intended isotope. The candidate of the experiment is (96)Ru + (96)Zr. Since the natural abundance of particular isotope is low and composition of isotope from ion source depends on the composites of the target, an isotope enriched material may be needed as a target. We studied the performance of the laser ion source required for the experiment for Zr ions.

  14. Ion-selective electrodes

    CERN Document Server

    Mikhelson, Konstantin N

    2013-01-01

    Ion-selective electrodes (ISEs) have a wide range of applications in clinical, environmental, food and pharmaceutical analysis as well as further uses in chemistry and life sciences. Based on his profound experience as a researcher in ISEs and a course instructor, the author summarizes current knowledge for advanced teaching and training purposes with a particular focus on ionophore-based ISEs. Coverage includes the basics of measuring with ISEs, essential membrane potential theory and a comprehensive overview of the various classes of ion-selective electrodes. The principles of constructing I

  15. Oxygen ion conductors

    Directory of Open Access Journals (Sweden)

    Stephen J Skinner

    2003-03-01

    A very interesting subgroup of this class of materials are the oxides that display oxygen ion conductivity. As well as the intrinsic interest in these materials, there has been a continued drive for their development because of the promise of important technological devices such as the solid oxide fuel cell (SOFC, oxygen separation membranes, and membranes for the conversion of methane to syngas1. All of these devices offer the potential of enormous commercial and ecological benefits provided suitable high performance materials can be developed. In this article we will review the materials currently under development for application in such devices with particular reference to some of the newly discovered oxide ion conductors.

  16. Microwave Discharge Ion Sources

    CERN Document Server

    Celona, L

    2013-01-01

    This chapter describes the basic principles, design features and characteristics of microwave discharge ion sources. A suitable source for the production of intense beams for high-power accelerators must satisfy the requirements of high brightness, stability and reliability. The 2.45 GHz off-resonance microwave discharge sources are ideal devices to generate the required beams, as they produce multimilliampere beams of protons, deuterons and singly charged ions. A description of different technical designs will be given, analysing their performance, with particular attention being paid to the quality of the beam, especially in terms of its emittance.

  17. Advanced penning ion source

    Energy Technology Data Exchange (ETDEWEB)

    Schenkel, Thomas; Ji, Qing; Persaud, Arun; Sy, Amy V.

    2016-11-01

    This disclosure provides systems, methods, and apparatus for ion generation. In one aspect, an apparatus includes an anode, a first cathode, a second cathode, and a plurality of cusp magnets. The anode has a first open end and a second open end. The first cathode is associated with the first open end of the anode. The second cathode is associated with the second open end of the anode. The anode, the first cathode, and the second cathode define a chamber. The second cathode has an open region configured for the passage of ions from the chamber. Each cusp magnet of the plurality of cusp magnets is disposed along a length of the anode.

  18. Uranyl ion coordination

    Science.gov (United States)

    Evans, H.T.

    1963-01-01

    A review of the known crystal structures containing the uranyl ion shows that plane-pentagon coordination is equally as prevalent as plane-square or plane-hexagon. It is suggested that puckered-hexagon configurations of OH - or H2O about the uranyl group will tend to revert to plane-pentagon coordination. The concept of pentagonal coordination is invoked for possible explanations of the complex crystallography of the natural uranyl hydroxides and the unusual behavior of polynuclear ions in hydrolyzed uranyl solutions.

  19. Interferometry with Strontium Ions

    Science.gov (United States)

    Jackson, Jarom; Lambert, Enoch; Otterstrom, Nils; Jones, Tyler; Durfee, Dallin

    2014-05-01

    We describe progress on a cold ion matter-wave interferometer. Cold Strontium atoms are extracted from an LVIS. The atoms will be photo-ionized with a two-photon transition to an auto-ionizing state in the continuum. The ions will be split and recombined using stimulated Raman transitions from a pair of diode lasers injection locked to two beams from a master laser which have been shifted up and down by half the hyperfine splitting. We are developing laser instrumentation for this project including a method to prevent mode-hopping by analyzing laser frequency noise, and an inexpensive, robust wavelength meter. Supported by NSF Award No. 1205736.

  20. Le Bassin caraïbe: lac états-unien ou méditerranée américaine?

    Directory of Open Access Journals (Sweden)

    Henry Godard

    2003-12-01

    Full Text Available Organisé autour du pôle majeur des États-Unis, le Bassin caraïbe se caractérise par des contrastes marqués entre ses rives septentrionale et méridionale et par l’intensité des flux qui le traversent. L’analyse des données relatives au tourisme de croisière et à l’évolution du trafic aérien dans le Bassin permet de confirmer ou d’infirmer la validité de ces deux concepts, lac ou méditerranée.

  1. Avaliação bioquimica e cariogenicidade da placa dental formada na presença de sacarose ou glicose+frutose. Estudo "in situ"

    OpenAIRE

    Maria Augusta Bessa Rebelo

    1998-01-01

    Resumo: O objetivo deste estudo foi analisar a composição da placa dental formada na presença de sacarose ou glicose+frutose e sua relação com cariogenicidade. Doze voluntários adultos participaram deste estudo cruzado realizado em 03 etapas de 28 dias. Para cada fase do estudo, um dispositivo palatino de acrílico contendo 04 blocos de esmalte dental humano foi confeccionado para os voluntários. Uma solução de sacarose 20% ou glicose 10% + fiutose 10% foi gotejada sobre os blocos de esmalte 8...

  2. Aspectos reprodutivos e produtivos de vacas da raça Holandesa com puerpério normal ou patológico

    OpenAIRE

    Martins,T.M.; R.L. Santos; Paixão,T.A.; É.A. Costa; Pires,A.C.; Borges,Á.M.

    2013-01-01

    Foram avaliadas 103 vacas da raça Holandesa de primeira, segunda ou terceira ordens de lactação, com o objetivo de comparar aspectos reprodutivos e produtivos dos animais com puerpério normal ou patológico. Exames ginecológicos foram realizados semanalmente, do parto ao final do puerpério, por meio de palpação transretal, ultrassonografia e vaginoscopia. As incidências de partos gemelares, partos auxiliados, retenção de placenta e infecções uterinas até o primeiro serviço foram de 11,7%, 20,4...

  3. O tratamento com melatonina, associado ou não à pioglitazona, melhora a resposta metabólica do tecido adiposo em ratos diabéticos.

    OpenAIRE

    Ariclecio Cunha de Oliveira

    2012-01-01

    Diabetes mellitus é uma doença resultante da baixa sensibilidade à insulina ou insuficiência da célula beta pancreática ou da associação dos dois fatores. Ratos com diabetes induzida por estreptozotocina durante o período neonatal no quinto dia de idade desenvolvem o quadro diabético clássico de hiperglicemia, hipoinsulinemia, poliúria, polidipsia agravada pela resistência à insulina na vida adulta. Neste estudo, foi investigado se o efeito de longo prazo do tratamento com melatonina e a sua ...

  4. Metallic oxides for desulphurization catalyst reaction; Oxidos metalicos mistos como catalisadores para reacoes de dessulfurizacao

    Energy Technology Data Exchange (ETDEWEB)

    Medeiros, R.L.B.A.; Melo, D.M.A.; Melo, M.A.F. [Universidade Federal do Rio Grande do Norte, Natal, RN (Brazil); Souza, K.S.G.M. [Universidade Federal da Paraiba - Departamento de Engenharia Quimica, PB (Brazil); Barros, J.M.F. [Universidade Federal de Campina Grande - Campos Cuite, PB (Brazil)

    2010-07-01

    The mixed metal oxides constitute an important class of catalytic materials widely investigated in different fields of applications. Studies of rare earth nickelates have been carried by several researchers in order to investigate the structural stability afforded by oxide formed and the existence of catalytic properties at room temperature. So, this study aims synthesize the nano sized catalyst of nickelate of lanthanum doped with strontium (La(1- x)Sr{sub x}NiO4-{sigma}; x = 0,2 and 0,3), through the Pechini method and your characterization for subsequent application in the desulfurization of thiophene reaction. The precursor solutions were calcined at 300 degree C/2h for pyrolysis of polyester and later calcinations occurred at temperatures of 500 - 1000 degree C. The resulting powders were characterized by thermogravimetric analysis (TG / DTG), surface area for adsorption of N{sub 2} by BET method, Xray diffraction (XRD), scanning electron microscopy (HR{sub S}EM) and spectrometry dispersive energy (EDS). The results of XRD had show that the perovskites obtained consist of two phases (LSN and NiO) and from 700 degree C have crystalline structure. The results of SEM evidenced the obtainment of nano metric powders. The results of BET show that the powders have surface area within the range used in catalysis (5-50m{sup 2}/g). The characterization of active sites was performed by reaction of desulfurization of thiophene at room temperature and 200 degree C, the relation F/W equal to 0,7 mol h{sup -1}m{sub c}at {sup -1}. The products of the reaction were separated by gas chromatography and identified by the selective detection PFPD sulfur. All samples had presented conversion above 95%. (author)

  5. [Dynamic study of small metallic clusters]; Estudio Dinamico de Pequenos Agregados Metalicos

    Energy Technology Data Exchange (ETDEWEB)

    Lopez, M.J. [Valladolid Univ. (Spain). Dept. de Fisica Teorica; Jellinek, J. [Argonne National Lab., IL (United States)

    1995-12-31

    We present a brief introduction to computer simulation techniques (particularly to classical molecular dynamics) and their application to the study of the thermodynamic properties of a material system. The basic concepts are illustrated in the study of structural and energetic properties such as the liquid-solid transition and the fragmentation of small clusters of nickel. [Espanol] Presentamos una breve introducci{acute o}n de las t{acute e}cnicas de simulaci{acute o}n por ordenador (en particular de la Din{acute a}mica Molecular cl{acute a}sica) y de su aplicaci{acute o}n al estudio de las propiedades termodin{acute a}micas de un sistema material. Los conceptos b{acute a}sicos se ilustran en el estudio de las propieades estructurales y energ{acute e}ticas, as{acute i} como de la transici{acute o}n de fase s{acute o}lido-l{acute i}quido y de las fragmentaciones de peque{tilde n}os agregados de n{acute i}quel.

  6. Uranium recovery from slags of metallic uranium; Recuperacao de uranio em escorias de uranio metalico

    Energy Technology Data Exchange (ETDEWEB)

    Fornarolo, F.; Frajndlich, E.U.C.; Durazzo, M. [Instituto de Pesquisas Energeticas e Nucleares (CNEN/IPEN-SP), Sao Paulo, SP (Brazil). Centro de Combustiveis Nucleares], e-mail: ffornar@ipen.br

    2006-07-01

    The Center of the Nuclear Fuel of the Institute of Nuclear Energy Research - IPEN finished the program of attainment of fuel development for research reactors the base of Uranium Scilicet (U{sub 3} Si{sub 2}) from Hexafluoride of Uranium (UF{sub 6}) with enrichment 20% in weight of {sup 235}U. In the process of attainment of the league of U 3 Si 2 we have as Uranium intermediate product the metallic one whose attainment generates a slag contend Uranium. The present work shows the results gotten in the process of recovery of Uranium in slags of calcined slags of Uranium metallic. Uranium the metallic one is unstable, pyrophoricity and extremely reactive, whereas the U{sub 3}O{sub 8} is a steady oxide of low chemical reactivity, what it justifies the process of calcination of slags of Uranium metallic. The calcination of the Uranium slag of the metallic one in oxygen presence reduces Uranium metallic the U{sub 3}O{sub 8}. Experiments had been developed varying it of acid for Uranium control and excess, nitric molar concentration gram with regard to the stoichiometric leaching reaction of temperature of the leaching process. The 96,0% income proves the viability of the recovery process of slags of Uranium metallic, adopting it previous calcination of these slags in nitric way with low acid concentration and low temperature of leaching. (author)

  7. New ground switches for metal oxide arresters; Nuevos desconectadores de tierra para pararrayos de oxidos metalicos

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez Hevia, D.

    2011-07-01

    Metal oxide arrester (PCM) for distribution lines disconnect devices used ground wire (DCT's) to disconnect power system failure. Often, these DCT are the least reliable of the arrester, and despite its crucial role to ensure continuity, quality and ability of supply. Surprising that standards bodies have not been worked to establish criteria and tests to ensure the reliability and proper functionality of this component. In this paper we analyze the most common designs of DCT's and the problems they present. It also introduces a new generation of DCT's that solves these problems and an improvement in the guarantees of reliability and functionality of these devices. (Author) 5 refs.

  8. Characterization of nano structured metallic materials; Caracterizacion de materiales metalicos nanoestructurados

    Energy Technology Data Exchange (ETDEWEB)

    Marin A, M.; Gutierrez W, C.; Cruz C, R.; Angeles C, C. [Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    1997-07-01

    Nowadays the search of new materials with specific optical properties has carried out to realize a series of experiments through the polymer synthesis [(C{sub 3}N{sub 3}){sub 2} (NH){sub 3}]{sub n} doped with gold metallic nanoparticles. The thermal stability of a polymer is due to the presence of tyazine rings contained in the structure. The samples were characterized by High Resolution Transmission Electron Microscopy, X-ray diffraction by the Powder method, Ft-infrared and its thermal properties by Differential Scanning Calorimetry (DSC) and Thermogravimetry (TGA). One of the purposes of this work is to obtain nano structured materials over a polymeric matrix. (Author)

  9. Ion-selective electrode reviews

    CERN Document Server

    Thomas, J D R

    1982-01-01

    Ion-Selective Electrode Reviews, Volume 3, provides a review of articles on ion-selective electrodes (ISEs). The volume begins with an article on methods based on titration procedures for surfactant analysis, which have been developed for discrete batch operation and for continuous AutoAnalyser use. Separate chapters deal with detection limits of ion-selective electrodes; the possibility of using inorganic ion-exchange materials as ion-sensors; and the effect of solvent on potentials of cells with ion-selective electrodes. Also included is a chapter on advances in calibration procedures, the d

  10. Analytical applications of ion exchangers

    CERN Document Server

    Inczédy, J

    1966-01-01

    Analytical Applications of Ion Exchangers presents the laboratory use of ion-exchange resins. This book discusses the development in the analytical application of ion exchangers. Organized into 10 chapters, this book begins with an overview of the history and significance of ion exchangers for technical purposes. This text then describes the properties of ion exchangers, which are large molecular water-insoluble polyelectrolytes having a cross-linked structure that contains ionic groups. Other chapters consider the theories concerning the operation of ion-exchange resins and investigate th

  11. Ion-Acoustic Instabilities in a Multi-Ion Plasma

    Directory of Open Access Journals (Sweden)

    Noble P. Abraham

    2013-01-01

    Full Text Available We have, in this paper, studied the stability of the ion-acoustic wave in a plasma composed of hydrogen, positively and negatively charged oxygen ions, and electrons, which approximates very well the plasma environment around a comet. Modelling each cometary component (H+, O+, and O− by a ring distribution, we find that ion-acoustic waves can be generated at frequencies comparable to the hydrogen ion plasma frequency. The dispersion relation has been solved both analytically and numerically. We find that the ratio of the ring speed (u⊥s to the thermal spread (vts modifies the dispersion characteristics of the ion-acoustic wave. The contrasting behaviour of the phase velocity of the ion-acoustic wave in the presence of O− ions for u⊥s>vts (and vice versa can be used to detect the presence of negatively charged oxygen ions and also their thermalization.

  12. Ion-dust streaming instability with non-Maxwellian ions

    Energy Technology Data Exchange (ETDEWEB)

    Kählert, Hanno, E-mail: kaehlert@theo-physik.uni-kiel.de [Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, Leibnizstr. 15, 24098 Kiel (Germany)

    2015-07-15

    The influence of non-Maxwellian ions on the ion-dust streaming instability in a complex plasma is investigated. The ion susceptibility employed for the calculations self-consistently accounts for the acceleration of the ions by a homogeneous background electric field and their collisions with neutral gas particles via a Bhatnagar-Gross-Krook collision term [e.g., A. V. Ivlev et al., Phys. Rev. E 71, 016405 (2005)], leading to significant deviations from a shifted Maxwellian distribution. The dispersion relation and the properties of the most unstable mode are studied in detail and compared with the Maxwellian case. The largest deviations occur at low to intermediate ion-neutral damping. In particular, the growth rate of the instability for ion streaming below the Bohm speed is found to be lower than in the case of Maxwellian ions, yet remains on a significant level even for fast ion flows above the Bohm speed.

  13. Ion Mass Determination

    DEFF Research Database (Denmark)

    2010-01-01

    An apparatus (100) is described for determining the mass of ions, the apparatus configured to hold a plasma (101 ) having a plasma potential. The apparatus (100) comprises an electrode (102) having a surface extending in a surface plane and an insulator (104) interfacing with the electrode (102...

  14. Ion implantation in polymers

    Science.gov (United States)

    Wintersgill, M. C.

    1984-02-01

    An introductory overview will be given of the effects of ion implantation on polymers, and certain areas will be examined in more detail. Radiation effects in general and ion implantation in particular, in the field of polymers, present a number of contrasts with those in ionic crystals, the most obvious difference being that the chemical effects of both the implanted species and the energy transfer to the host may profoundly change the nature of the target material. Common effects include crosslinking and scission of polymer chains, gas evolution, double bond formation and the formation of additional free radicals. Research has spanned the chemical processes involved, including polymerization reactions achievable only with the use of radiation, to applied research dealing both with the effects of radiation on polymers already in commercial use and the tailoring of new materials to specific applications. Polymers are commonly divided into two groups, in describing their behavior under irradiation. Group I includes materials which form crosslinks between molecules, whereas Group II materials tend to degrade. In basic research, interest has centered on Group I materials and of these polyethylene has been studied most intensively. Applied materials research has investigated a variety of polymers, particularly those used in cable insulation, and those utilized in ion beam lithography of etch masks. Currently there is also great interest in enhancing the conducting properties of polymers, and these uses would tend to involve the doping capabilities of ion implantation, rather than the energy deposition.

  15. Photo ion spectrometer

    Science.gov (United States)

    Gruen, Dieter M.; Young, Charles E.; Pellin, Michael J.

    1989-01-01

    A method and apparatus for extracting for quantitative analysis ions of selected atomic components of a sample. A lens system is configured to provide a slowly diminishing field region for a volume containing the selected atomic components, enabling accurate energy analysis of ions generated in the slowly diminishing field region. The lens system also enables focusing on a sample of a charged particle beam, such as an ion beam, along a path length perpendicular to the sample and extraction of the charged particles along a path length also perpendicular to the sample. Improvement of signal to noise ratio is achieved by laser excitation of ions to selected autoionization states before carrying out quantitative analysis. Accurate energy analysis of energetic charged particles is assured by using a preselected resistive thick film configuration disposed on an insulator substrate for generating predetermined electric field boundary conditions to achieve for analysis the required electric field potential. The spectrometer also is applicable in the fields of SIMS, ISS and electron spectroscopy.

  16. Anodes sliced with ions

    NARCIS (Netherlands)

    Boukamp, Bernard A.

    2006-01-01

    A detailed image of a complex fuel-cell anode structure, obtained through ion-beam milling, SEM imaging and advanced digital reconstruction, yields an accurate description of the three-dimensional structure, and enables correct prediction of the electrode's properties

  17. Ion Implantation of Polymers

    DEFF Research Database (Denmark)

    Popok, Vladimir

    2012-01-01

    are discussed. Related to that, the effects of radiothermolysis, degassing and carbonisation are considered. Specificity of depth distributions of implanted into polymers impurities is analysed and the case of high-fluence implantation is emphasised. Within rather broad topic of ion bombardment, the focus...

  18. Ion transport from plasma ion source at ISOLTRAP

    CERN Document Server

    Steinsberger, Timo Pascal

    2017-01-01

    In this report, my work as CERN Summer Student at the ISOLTRAP experiment at ISOLDE is described. A new plasma ion source used as oine source for calibration and implemented before my arrival was commissioned and transportation settings for the produced ions to the ion traps were found. The cyclotron frequencies of 40Ar and the xenon isotopes 129-132Xe were measured using time-of-flight and phase-imaging ion-cyclotron-resonance mass spectroscopy.

  19. Compact RF ion source for industrial electrostatic ion accelerator

    Energy Technology Data Exchange (ETDEWEB)

    Kwon, Hyeok-Jung, E-mail: hjkwon@kaeri.re.kr; Park, Sae-Hoon; Kim, Dae-Il; Cho, Yong-Sub [Korea Multi-purpose Accelerator Complex, Korea Atomic Energy Research Institute, Gyeongsangbukdo 38180 (Korea, Republic of)

    2016-02-15

    Korea Multi-purpose Accelerator Complex is developing a single-ended electrostatic ion accelerator to irradiate gaseous ions, such as hydrogen and nitrogen, on materials for industrial applications. ELV type high voltage power supply has been selected. Because of the limited space, electrical power, and robust operation, a 200 MHz RF ion source has been developed. In this paper, the accelerator system, test stand of the ion source, and its test results are described.

  20. Ion-Beam-Excited Electrostatic Ion Cyclotron Waves

    DEFF Research Database (Denmark)

    Michelsen, Poul; Pécseli, Hans; Juul Rasmussen, Jens

    1976-01-01

    Self-excited electrostatic ion cyclotron waves were observed in an ion-beam-plasma system produced in a DP-operated Q-machine. The frequency of the waves showed the theoretically predicted variation with the magnetic field.......Self-excited electrostatic ion cyclotron waves were observed in an ion-beam-plasma system produced in a DP-operated Q-machine. The frequency of the waves showed the theoretically predicted variation with the magnetic field....

  1. Lithium ion sources

    Science.gov (United States)

    Roy, Prabir K.; Greenway, Wayne G.; Grote, Dave P.; Kwan, Joe W.; Lidia, Steven M.; Seidl, Peter A.; Waldron, William L.

    2014-01-01

    A 10.9 cm diameter lithium alumino-silicate ion source has been chosen as a source of ˜100mA lithium ion current for the Neutralized Drift Compression Experiment (NDCX-II) at LBNL. Research and development was carried out on lithium alumino-silicate ion sources prior to NDCX-II source fabrication. Space-charge-limited emission with the current density exceeding 1 mA/cm2 was measured with 0.64 cm diameter lithium alumino-silicate ion sources at 1275 °C. The beam current density is less for the first 10.9 cm diameter NDCX-II source, and it may be due to an issue of surface coverage. The lifetime of a thin coated (on a tungsten substrate) source is varied, roughly 40-50 h, when pulsed at 0.05 Hz and with pulse length of 6μs each, i.e., a duty factor of 3×10-7, at an operating temperature of 1250-1275 °C. The 10.9 cm diameter source lifetime is likely the same as of a 0.64 cm source, but the lifetime of a source with a 2 mm diameter (without a tungsten substrate) is 10-15 h with a duty factor of 1 (DC extraction). The lifetime variation is dependent on the amount of deposition of β-eucryptite mass, and the surface temperature. The amount of mass deposition does not significantly alter the current density. More ion source work is needed to improve the large source performance.

  2. Lithium ion sources

    Energy Technology Data Exchange (ETDEWEB)

    Roy, Prabir K., E-mail: pkroy@lbl.gov [Lawrence Berkeley National Laboratory (LBNL), One Cyclotron Road, Berkeley, California CA-94720 (United States); Greenway, Wayne G. [Lawrence Berkeley National Laboratory (LBNL), One Cyclotron Road, Berkeley, California CA-94720 (United States); Grote, Dave P. [Lawrence Livermore National Laboratory LLC, CA-94550 (United States); Kwan, Joe W.; Lidia, Steven M.; Seidl, Peter A.; Waldron, William L. [Lawrence Berkeley National Laboratory (LBNL), One Cyclotron Road, Berkeley, California CA-94720 (United States)

    2014-01-01

    A 10.9 cm diameter lithium alumino-silicate ion source has been chosen as a source of ∼100mA lithium ion current for the Neutralized Drift Compression Experiment (NDCX-II) at LBNL. Research and development was carried out on lithium alumino-silicate ion sources prior to NDCX-II source fabrication. Space-charge-limited emission with the current density exceeding 1 mA/cm{sup 2} was measured with 0.64 cm diameter lithium alumino-silicate ion sources at 1275 °C. The beam current density is less for the first 10.9 cm diameter NDCX-II source, and it may be due to an issue of surface coverage. The lifetime of a thin coated (on a tungsten substrate) source is varied, roughly 40–50 h, when pulsed at 0.05 Hz and with pulse length of 6μs each, i.e., a duty factor of 3×10{sup −7}, at an operating temperature of 1250–1275 °C. The 10.9 cm diameter source lifetime is likely the same as of a 0.64 cm source, but the lifetime of a source with a 2 mm diameter (without a tungsten substrate) is 10–15 h with a duty factor of 1 (DC extraction). The lifetime variation is dependent on the amount of deposition of β-eucryptite mass, and the surface temperature. The amount of mass deposition does not significantly alter the current density. More ion source work is needed to improve the large source performance.

  3. Using Ion Exchange Chromatography to Separate and Quantify Complex Ions

    Science.gov (United States)

    Johnson, Brian J.

    2014-01-01

    Ion exchange chromatography is an important technique in the separation of charged species, particularly in biological, inorganic, and environmental samples. In this experiment, students are supplied with a mixture of two substitution-inert complex ions. They separate the complexes by ion exchange chromatography using a "flash"…

  4. Device for separating non-ions from ions

    Energy Technology Data Exchange (ETDEWEB)

    Ibrahim, Yehia M.; Smith, Richard D.

    2017-01-31

    A device for separating non-ions from ions is disclosed. The device includes a plurality of electrodes positioned around a center axis of the device and having apertures therein through which the ions are transmitted. An inner diameter of the apertures varies in length. At least a portion of the center axis between the electrodes is non-linear.

  5. Unstable Electrostatic Ion Cyclotron Waves Exited by an Ion Beam

    DEFF Research Database (Denmark)

    Michelsen, Poul; Pécseli, Hans; Juul Rasmussen, Jens

    1976-01-01

    Electrostatic ion cyclotron waves were observed in a quiescent cesium plasma into which a low‐energy beam of sodium ions was injected. The instability appeared when the beam velocity was above 12 times the ion thermal velocity. The waves propagated along the magnetic field with a velocity somewhat...

  6. Using Ion Exchange Chromatography to Separate and Quantify Complex Ions

    Science.gov (United States)

    Johnson, Brian J.

    2014-01-01

    Ion exchange chromatography is an important technique in the separation of charged species, particularly in biological, inorganic, and environmental samples. In this experiment, students are supplied with a mixture of two substitution-inert complex ions. They separate the complexes by ion exchange chromatography using a "flash"…

  7. Hemoglobinas humanas: hipótese malária ou efeito materno? Human hemoglobins: malaria hypothesis or maternal effect?

    Directory of Open Access Journals (Sweden)

    Felipe R. Torres

    2005-03-01

    Full Text Available As hemoglobinopatias têm provido uma das poucas demonstrações convincentes da seleção, influenciando a freqüência de único gene na população humana. A alta taxa de desordens, tais como a anemia falciforme e a beta-talassemia, ocorridas em áreas subtropicais ou tropicais dentro do cinturão da malária, levou Haldane a propor que a malária pode ser o agente seletivo responsável que balanceia a perda dos genes para a talassemia e a anemia falciforme, por morte prematura dos homozigotos a partir do aumento do valor adaptativo de heterozigotos no ambiente com malária. Mas uma nova proposta surgiu para explicar a manutenção deste polimorfismo, baseada na fertilidade diferencial ou efeito parental. Alguns autores observaram uma distorção favorecendo a transmissão de alelos mutantes em áreas não endêmicas de malária. Com base nestas observações, esses autores propuseram um efeito materno para explicar tais distorções. Este estudo tem como objetivo apresentar uma revisão destes mecanismos envolvidos na manutenção do polimorfismo de hemoglobinopatias, desde seu modelo clássico até hipóteses alternativas que surgiram recentemente na literatura.Hemoglobinopathies are providing one of the few convincing demonstrations of selection, influencing the frequency of a single gene in the human population. The high rate of disorders, such as the sickle cell anemia and beta-thalassemia that occur in the subtropical or tropical regions within the strip affected by malaria, led Haldane to propose that malaria may be the selective agent responsible for balancing the loss of thalassemia and sickle cell anemia genes due to the early death of homozygous patients. But a new proposal appeared to explain the maintenance of these polymorphisms, based on the differential fertility or parental effect. Some authors observed a distortion favoring the transmission of mutant alleles in non-endemic malaria areas. Based on these observations, the

  8. Avaliação da progênie de ovelhas Merino Australiano cruzadas com carneiro Dorper ou Southdown

    Directory of Open Access Journals (Sweden)

    G. Bianchi

    2016-02-01

    Full Text Available O presente estudo objetivou avaliar o efeito do genótipo do carneiro (Dorper ou Southdown, do sexo e do tipo de parto sobre características de crescimento de 268 cordeiros filhos de ovelhas Merino Australiano. Até o desmame, todos os animais permaneceram sobre pastagem de trevo-vermelho (Trifolium pratense , chicória (Cychorium intibus , trevo-branco (Trifolium repens , festuca (Festuca arundinacea e azevém (Lolium multiflorum , com carga animal de 10 ovelhas com seus cordeiros/ha. A partir do desmame (29,95±4,94kg de peso vivo e 109,45±7,41 dias de idade, os cordeiros permaneceram sobre a mesma pastagem utilizada durante a lactação, sendo terminados posteriormente sobre um cultivo de soja (Glycine max , com carga animal de 30 cordeiros/ha. Não foi verificado efeito do genótipo do carneiro (P>0,05 sobre nenhuma das variáveis analisadas. Por outro lado, do nascimento ao desmame e do desmame até o embarque dos cordeiros para abate, os machos (criptorquidas apresentaram ganhos de peso diário superiores (241 e 212g/dia; 121 e 94g/dia, para machos e fêmeas, respectivamente; P≤0,001, o que proporcionou um peso vivo ao embarque 14,9% superior em relação às fêmeas (40,89 e 35,59kg, para machos e fêmeas, respectivamente; P≤0,001. Os cordeiros de parto simples apresentaram maiores (P≤0,001 pesos vivos e medidas corporais ao nascimento, bem como maior velocidade de crescimento até o desmame (239 e 214g/dia, parto simples e duplo, respectivamente; P≤0,001. Porém, após o desmame, os cordeiros de parto duplo apresentaram maior ganho de peso (98 e 117g/dia (P≤0,05 e uma superioridade (P≤0,001 em quilogramas de cordeiros desmamados (26,80 e 49,61kg ou embarcados (33,91 e 64,69kg por ovelha parida. Independentemente do sexo e do tipo de parto, todos os cordeiros superaram as exigências de peso e condição corporal mínima requerida para comercialização de cordeiros pesados no Uruguai, na metade do tempo que em média ocorre

  9. Avaliação da buprenorfina pelas vias intravenosa ou intramuscular em cães anestesiados pelo desfluorano

    Directory of Open Access Journals (Sweden)

    Souza Almir Pereira de

    2004-01-01

    Full Text Available Objetivou-se avaliar comparativamente os efeitos da buprenorfina, administrada pelas vias intramuscular(IM ou intravenosa (IV, sobre variáveis cardiovasculares, em cães anestesiados com desfluorano. Para tanto, foram utilizados dezesseis cães adultos, clinicamente saudáveis, distribuídos em dois grupos (n=8 denominados de GI e GII. Em ambos os grupos, a anestesia foi induzida com propofol (8 mg/kg, IV e em seguida os animais foram intubados com sonda orotraqueal de Magill, a qual foi conectada ao aparelho de anestesia volátil para administração de desfluorano (1,5 CAM. Após 30 minutos do início da anestesia inalatória, foi aplicado no GI buprenorfina na dose de 0,02 mg/kg pela via IV, enquanto no GII administrou-se o opióide na mesma dose porém pela via IM. Avaliaram-se: freqüência cardíaca (FC; pressões arteriais sistólica, diastólica e média (PAS, PAD e PAM; débito cardíaco (DC; pressão venosa central (PVC e pressão da artéria pulmonar (PAP. As colheitas foram feitas nos seguintes momentos: M1 - 30 minutos após o início da anestesia inalatória antes da aplicação do opióide; M2 - 15 minutos após a administração da buprenorfina; M3, M4 e M5 - de 15 em 15 minutos após M2. A avaliação estatística dos dados foi efetuada por meio de Análise de Perfil (p<0,05. As variáveis PAS, PAM, DC, PVC e PAP, não apresentaram alterações significativas de seus valores em ambos os grupos. Entretanto, a FC e a PAD apresentaram reduções significativas após a administração do opióide apenas no GI. Assim, pôde-se concluir que a buprenorfina administrada pelas vias IV ou IM não interferiu nos índices cardiovasculares de forma a manifestar efeitos clínicos importantes em cães anestesiados com desfluorano.

  10. OTIMIZAÇÃO DE CUSTOS DO TRANSPORTE PÚBLICO URBANO: COMPRAR OU VENDER UM ÔNIBUS USADO?

    Directory of Open Access Journals (Sweden)

    Ana Paula Rodrigues da Costa

    2014-08-01

    Full Text Available Embora a discussão sobre a mobilidade urbana envolva as modalidades de transporte de massa, a maioria das cidades ainda se valem das frotas de ônibus. Esta pesquisa objetiva apresentar um modelo que propõe identificar o momento que poderá ser exercida a opção de vender ou comprar um veículo usado da frota de ônibus do sistema de transporte público urbano, por meio da aplicação da Teoria de Opções Reais (TOR. Pesquisas apontam que quando o veículo é novo os custos de manutenção são baixos, cobrindo basicamente as revisões de rotina e a substituição de componentes, porém depois de certa idade, esses custos vão aumentando. Neste sentido uma dúvida que sempre surge é decidir o momento adequado para adquirir ou se desfazer de um veículo usado. A teoria utilizada neste estudo, a TOR, foca no Modelo Binomial em Tempo Discreto. Metodologicamente, o estudo foi desenvolvido com dados reais de um caso específico de frota de ônibus que serviu de suporte para a construção e teste do modelo proposto e apoiou-se em dados de uma empresa de ônibus tradicional do Espírito Santo. O modelo proposto é validado por meio de exemplo numérico que identifica o momento para a tomada de decisão. No caso em estudo o modelo apresentou o momento da opção a partir do final do segundo ano de uso do ônibus. A metodologia aplicada e os resultados encontrados despertam para a necessidade dos gestores terem informações decorrentes dos dados das frotas e poderem tomar decisões mais seguras, especialmente o momento “ideal” para substituição da frota. Para o poder público, estudos dessa natureza podem gerar subsídios à elaboração de normativos pelas agências reguladoras com vistas ao atendimento pelas concessionárias e de parcerias público-privado.

  11. Prolonging coherence in trapped ions

    CSIR Research Space (South Africa)

    Uys, H

    2010-09-01

    Full Text Available The authors study pulse sequences that dynamically decouple 9Be+ ions from their decohering environment. The noise environment the ions see is artificially synthesized to emulate a variety of physical systems. By incorporating measurement feedback...

  12. Membranes in Lithium Ion Batteries

    Directory of Open Access Journals (Sweden)

    Junbo Hou

    2012-07-01

    Full Text Available Lithium ion batteries have proven themselves the main choice of power sources for portable electronics. Besides consumer electronics, lithium ion batteries are also growing in popularity for military, electric vehicle, and aerospace applications. The present review attempts to summarize the knowledge about some selected membranes in lithium ion batteries. Based on the type of electrolyte used, literature concerning ceramic-glass and polymer solid ion conductors, microporous filter type separators and polymer gel based membranes is reviewed.

  13. Membranes in lithium ion batteries.

    Science.gov (United States)

    Yang, Min; Hou, Junbo

    2012-07-04

    Lithium ion batteries have proven themselves the main choice of power sources for portable electronics. Besides consumer electronics, lithium ion batteries are also growing in popularity for military, electric vehicle, and aerospace applications. The present review attempts to summarize the knowledge about some selected membranes in lithium ion batteries. Based on the type of electrolyte used, literature concerning ceramic-glass and polymer solid ion conductors, microporous filter type separators and polymer gel based membranes is reviewed.

  14. Impact of climate change on sediment yield in the Mekong River basin: a case study of the Nam Ou basin, Lao PDR

    NARCIS (Netherlands)

    Shrestha, B.; Babel, M.S.; Maskey, S.; Van Griensven, A.; Uhlenbrook, S.; Green, A.; Akkharath, I.

    2013-01-01

    This paper evaluates the impact of climate change on sediment yield in the Nam Ou basin located in northern Laos. Future climate (temperature and precipitation) from four general circulation models (GCMs) that are found to perform well in the Mekong region and a regional circulation model (PRECIS) a

  15. Teologia Afro (ou Negra da Libertação : balanço e perspectivas (Afro (or Black Liberation Theology: balance and perspectives.

    Directory of Open Access Journals (Sweden)

    Marcos Rodrigues da Silva

    2013-12-01

    Full Text Available KOINONIA/ASETTMINGA/MUTIRÃO DE REVISTAS DE TEOLOGIA LATINO-AMERICANASTeologia Afro (ou Negra da Libertação :  balanço  e perspectivas (Afro - or Black - Liberation Theology: balance and perspectives.

  16. Acidente vascular cerebral ou doença encéfalo vascular ?: Revendo a designação e respeitando a anatomia

    Directory of Open Access Journals (Sweden)

    João Eliézer Ferri-de-Barros

    1994-06-01

    Full Text Available Desde que a doença vascular que acomete o sistema nervoso central de localização intracraniana pode comprometer estruturas supra ou/e infratentoriais, propomos a mudança de "Acidente vascular cerebral" para "Doença encéfalo vascular".

  17. Síntese da parede abdominal: sutura contínua ou com pontos separados? Revisão da literatura

    Directory of Open Access Journals (Sweden)

    Tognini João Ricardo F.

    1998-01-01

    Full Text Available Uma revisão da literatura foi realizada para atualização sobre o fechamento da parede abdominal. São relatados historicamente as controvérsias inerentes ao tema. Atualmente considera-se que o fechamento em massa do plano peritônio-músculo-aponeurótico é o mais adequado, com menor risco de complicações do que o fechamento por planos anatômicos. O tipo de fio utilizado, apesar de existirem várias opções, também está estabelecido, sendo melhor empregado os fios inabsorvíveis, ou os absorvíveis de longa duração, preferencialmente monofilamentares. Quanto fechar as laparotomias com sutura contína ou sutura com pontos separados, permanecem divergências, sendo que várias publicações, com diferentes amostras e meios de avaliação, referem vantagens para uma ou outra técnica, ou concluem pela similaridade de resultados entre elas. Sobre essas divergências, os autores discutem a sutura contínua e a sutura com pontos separados no fechamento da parede abdominal, abordando os aspectos técnicos de ambas.

  18. Acidente vascular cerebral ou doença encéfalo vascular ?: Revendo a designação e respeitando a anatomia

    OpenAIRE

    1994-01-01

    Desde que a doença vascular que acomete o sistema nervoso central de localização intracraniana pode comprometer estruturas supra ou/e infratentoriais, propomos a mudança de "Acidente vascular cerebral" para "Doença encéfalo vascular".

  19. Observations of Collective Ion Acceleration.

    Science.gov (United States)

    1981-01-01

    possible benefit can be listed. In cancer therapy, radiation produced by ion beams may be more selectively directed into tumors. Ion beams in spallation...34Autoresonant Accelerator Concept," Phys. Rev. Lett. 31, 1234 (1973). 50. S. Humphries, J. J. Lee, and R. N. Sudan, "Generation of Incense Pulsed Ion Beams

  20. Macroreticular chelating ion-exchangers.

    Science.gov (United States)

    Hirsch, R F; E Gancher, R; Russo, F R

    1970-06-01

    Two macroreticular chelating ion-exchangers have been prepared and characterized. One contains the iminodiacetate group and the second contains the arsonate group as the ion-exchanging site. The macroreticular resins show selectivities among metal ions similar to those of the commercially available naicroreticular chelating resins. Chromatographie separations on the new resins are rapid and sharp.

  1. An ion-optical bench for testing ion source lenses

    Science.gov (United States)

    Stoffels, J. J.; Ells, D. R.

    1988-06-01

    An ion-optical bench has been designed and constructed to obtain experimental data on the focusing properties of ion lenses in three dimensions. The heart of the apparatus is a position-sensitive detector (PSD) that gives output signals proportional to the x and y positions of each ion impact. The position signals can be displayed on an oscilloscope screen and analyzed by a two-parameter pulse-height analyzer, thereby giving a visual picture of the ion beam cross section and intensity distribution. The PSD itself is mounted on a track and is movable during operation from a position immediately following the ion lens to 30 cm away. This enables the rapid collection of accurate data on the intensity distribution and divergence angles of ions leaving the source lens. Examples of ion lens measurements are given.

  2. Pax Americana ou o império da insegurança? Pax Americana or the empire of insecurity?

    Directory of Open Access Journals (Sweden)

    Andrew Hurrell

    2005-12-01

    Full Text Available No artigo pretende-se mostrar a posição dos Estados Unidos em um diferente contexto conceitual e histórico, como tentativa de escapar-se do imediatismo da discussão atual do país como um poder imperial ou hegemônico, trazidos pelos debates atuais. Revela-se assim, problemas de definições dos conceitos de imperialismo e hegemonia, assim como da dominação formal/infomal distorcendo a real imagem e posição da América do Norte no campo internacional nos dias atuais.The article intends to show the position of the United States in a different conceptual and historical context, as attempt to run away itself of the immediacy of the current debate of the state as one to be able imperial or hegemonic, brought for the current discussion. It discloses thus, problems of definitions of the concepts of imperialism and hegemony, as well as of the formal and informal domination, distorting the real image and position of North America in the international field in the current days.

  3. PERFIL DAS CRIANÇAS SUBMETIDAS À AMIGDALECTOMIA E/OU ADENOIDECTOMIA EM UM HOSPITAL GERAL DE TAUBATÉ-SP

    Directory of Open Access Journals (Sweden)

    Tais Maria Candido Marcondes

    2017-01-01

    Full Text Available As amígdalas são conhecidas como tonsilas palatinas estão localizadas na orofaringe e as adenóides como tonsilas faríngeas, localizadas atrás das fossas nasais. Objetivo: Identificar o perfil clínico e cirúrgico das crianças submetidas a amigdalectomia e/ou adenoidectomia em um hospital de Taubaté - SP. Método: Pesquisa retrospectiva e quantitativa. Resultados: Foram pesquisados 361 prontuários. A faixa etária, foi de 4 a 7 anos em 32,32%, sexo masculino em 50,42%; a indicação cirúrgica foi hipertrofia adenoamigdaliana em 85,04%; o ronco prevaleceu em 32,03% e a inflamação da garganta, em 45,54%,  cirurgia de adenoamigdalectomia em 85,04%, tempo de cirurgia foi de 0-20 minutos em 60,94%, tempo de internação de 16h-20h em 37,67%. Conclusão: o perfil das crianças foi de 4 a 7 anos de idade; masculino; com hipertrofia adenoamigdaliana; cirurgia adenoamigdalectomia; período de internação de 16h a 20h e com ausência de complicações.

  4. Intervenção no abuso sexual intrafamiliar: ingerência invasiva ou proteção devida?

    Directory of Open Access Journals (Sweden)

    Santos, Viviane Amaral dos

    2009-01-01

    Full Text Available Este texto se propõe a discutir os aspectos jurídicos e psicológicos presentes no abuso sexual intrafamiliar. Pensamos a proteção da criança ou do adolescente a partir da constatação de que o maior número de abusos sexuais é cometido no seio das famílias e com maior frequência pelos pais e padrastos. Colocamos algumas questões com o intuito de melhor compreender a interface entre Psicologia e Direito na ingerência deste problema, com vistas à possível proteção e restauração de direitos das vítimas. Ressaltamos as contradições presentes e concluímos que a intervenção judicial pode ser determinante para a interrupção da violação do direito a uma vida digna e ao desenvolvimento sexual saudável tanto de crianças como de adolescentes. Reconhecemos que, apesar de a violência sexual intrafamiliar ocorrer no contexto privado, ela tem caráter social e público por atentar contra os direitos humanos básicos, e requer uma intervenção legal para restabelecer e garantir esses direitos

  5. The different origins of magnetic fields and activity in the Hertzsprung gap stars, OU Andromedae and 31 Comae

    CERN Document Server

    Borisova, A; Petit, P; Konstantinova-Antova, R; Charbonnel, C; Drake, N A

    2016-01-01

    Context: When crossing the Hertzsprung gap, intermediate-mass stars develop a convective envelope. Fast rotators on the main sequence, or Ap star descendants, are expected to become magnetic active subgiants during this evolutionary phase. Aims: We compare the surface magnetic fields and activity indicators of two active, fast rotating red giants with similar masses and spectral class but diferent rotation rates - OU And (Prot=24.2 d) and 31 Com (Prot=6.8 d) - to address the question of the origin of their magnetism and high activity. Methods: Observations were carried out with the Narval spectropolarimeter in 2008 and 2013.We used the least squares deconvolution technique to extract Stokes V and I profiles to detect Zeeman signatures of the magnetic field of the stars. We provide Zeeman-Doppler imaging, activity indicator monitoring, and a precise estimation of stellar parameters. We use stellar evolutionary models to infer the evolutionary status and the initial rotation velocity on the main sequence. Resul...

  6. Spatial assessment and source identification of trace metal pollution in stream sediments of Oued El Maadene basin, northern Tunisia.

    Science.gov (United States)

    Ayari, J; Agnan, Y; Charef, A

    2016-07-01

    An extensive spatial survey was conducted on trace metal content in stream sediments from Oued El Maadene basin, northern Tunisia. Our objectives were to evaluate the level of trace metal pollution and associated ecological risk and identify the major sources of metal pollution. A total of 116 stream sediment samples were collected and analysed for total As, Cd, Cr, Cu, Ni, Pb, V, Zn, and Zr concentrations. The results showed that concentrations of Cr, Ni, V, and Zr were close to natural levels. In contrast, As, Cd, Cu, Pb, and Zn had elevated concentrations and enrichment factors compared to other contaminated regions in northern Tunisia. Ecological risk to aquatic ecosystems was highlighted in most areas. Principal component analysis showed that Cr, Ni, V, and Zr mainly derived from local soil and bedrock weathering, whilst As, Cd, Pb, and Zn originated from mining wastes. Trace metals could be dispersed downstream of tailings, possibly due to surface runoff during the short rainy season. Surprisingly, Cu, and to a lesser extent As, originated from agricultural activities, related to application of Cu-based fungicides in former vineyards and orchards. This study showed that, despite the complete cessation of mining activities several decades ago, metal pollution still impacts the local environment. This large pollution, however, did not mask other additional sources, such as local agricultural applications of fungicides.

  7. Fast food ou comida regional? as preferências gastronômicas dos turistas que visitam Natal (RN

    Directory of Open Access Journals (Sweden)

    Bruna Alves de Araújo

    2016-01-01

    Full Text Available Este artigo apresenta os resultados de uma pesquisa realizada por meio de um trabalho de conclusão do curso de Turismo, na Universidade Federal do Rio Grande do Norte, que teve como principal objetivo analisar as preferências gastronômicas, fast food ou pratos típicos locais, dos turistas que visitam Natal/RN. A pesquisa consistiu, além da pesquisa bibliográfica, da aplicação de 100 (cem questionários com turistas que visitaram a cidade nos meses de abril e maio de 2015. A partir dos dados coletados, verificou-se que a maior parte dos turistas que visitam Natal, opta pela comida típica regional, sendo importante destacar que a aproximação com a realidade local, é o principal elemento que justifica a escolha dos turistas por pratos típicos. Mesmo em menor quantidade, uma parte dos turistas opta pelo consumo de fast food, justificando-se tal escolha, por se tratar de pratos conhecidos e terem preços acessíveis. Identificaram-se ainda, outros aspectos na pesquisa, como a necessidade de existir um marketing turístico voltado para a gastronomia local e a imagem gastronômica da cidade ser vinculada aos frutos do mar, sendo este, um elemento diferenciador da cidade, em comparação a outros destinos.

  8. Clearer visibility of the Hong-Ou-Mandel effect with a correlation function based on rates rather than intensities

    Science.gov (United States)

    Rosołek, Krzysztof; Kostrzewa, Kamil; Dutta, Arijit; Laskowski, Wiesław; Wieśniak, Marcin; Żukowski, Marek

    2017-04-01

    We test ideas put forward, e.g., by Żukowski et al. [M. Żukowski et al., Phys. Rev. A 95, 042113 (2017), 10.1103/PhysRevA.95.042113], which suggest that using rates in quantum optics can lead to better indicators of nonclassicality for states of quantum optical fields with undefined photon numbers. By rate we mean the ratio of registered photons in a given detector to the total number of detected photons in all detectors in a run of the experiment. For the Hong-Ou-Mandel effect for parametric down-conversion fields, we show that by using two detector correlation functions, which are defined in terms of averages of products of measured rates, rather than usual intensities, one can observe nonclassical visibilities beyond 1 /2 for significantly higher pump rates. At such rates we already have the partially stimulated emission, which leads to significant amplitudes for multiple pairs production, still the approach allows us to clearly see the nonclassical dip. We consider both the perfect and imperfect detection efficiency.

  9. Contrefaire l’art ou contrefaire la nature : l’analogie artistique pour la restauration écologique

    Directory of Open Access Journals (Sweden)

    Andrew Light

    2009-12-01

    Full Text Available Cet article se présente comme une réflexion critique sur les thèses d’un certain nombre de spécialistes d’éthique de l’environnement quant à la valeur éthique des pratiques de restauration écologique. La principale référence de l’article est aux travaux de Robert Elliot, qui a assimilé la restauration d’espaces naturels dégradés à une contrefaçon : restaurer la nature ne peut être que le travail d’un faussaire. Mais, comme le montre Andrew Light, cette position est intenable : rejeter toute restauration de terrains plus ou moins dégradés, c’est se priver des moyens de faire la différence entre ce qui est gravement détérioré (un dépôt d’ordures ou complètement transformé (comme un paysage urbain et ce qui a été restauré. La position inverse n’est pas non plus tenable : dire que tout peut être restauré, que l’homme peut, à volonté, recréer la nature, c’est être prêt à accepter toutes les dégradations, puisque, de toute façon, on pourra restaurer un paysage naturel. Il faut donc trouver un critère permettant de distinguer entre bonne et mauvaise restauration. La référence est à la nature originelle : une nature restaurée peut-elle avoir autant de valeur qu’une nature originelle ? Dans cet objectif, Andrew Light propose une analogie entre la restauration écologique et la restauration des œuvres d’art. Proposant que l’on juge de la valeur de la restauration non sur l’intention de celui qui restaure, mais sur le processus, il ajoute à cela une distinction entre le processus et le produit ou le résultat, tout en suggérant que le produit ne soit pas considéré isolément, mais dans l’ensemble dans lequel il s’insère. Cessant de considérer la restauration écologique comme un faux ou une contrefaçon, mais en l’envisageant à la façon des restaurations d’œuvres d’art, Andrew Light propose ainsi des critères de distinction entre les différents types de

  10. Adeus, Geronimo (ou notícias de uma história global do tempo presente

    Directory of Open Access Journals (Sweden)

    Daniel Afonso da Silva

    2016-12-01

    Full Text Available “Geronimo” foi o codinome atribuído a Osama Bin Laden pelas forças especiais americanas. Muito antes dos ataques de 11 de setembro de 2001, “Geronimo” já vinha sendo procurado mundo afora. O após 11 de setembro, a procura foi apenas intensificada. Com a chegada de Barack Obama, foram implantadas diversas estratégias – como ampliação das forças especiais e utilização ostensiva de drones – para efetivamente neutralizar “Geronimo” e seus seguidores. Em 2 de maio de 2011 “Geronimo” foi, enfim, eliminado. Logo em seguida, o presidente Obama começou a anunciar que a decade of war is ending. O núcleo das preocupações americanas não existia mais. Com isso, os Estados Unidos poderiam retornar majoritariamente os seus esforços a suas questões tradicionais e a seus problemas fundamentais, como a crise financeira. Em seu mais importante discurso nesse início de segundo mandato, proferido em maio de 2013, na National Defense University, o presidente Obama apresentou a estratégia americana para superar esses problemas e reabilitar seu lugar de protagonista incontornável do sistema internacional. O presente artigo analisa os significados dessa estratégia e algumas de suas possíveis consequências.

  11. Cytotoxic effect of chlorpyrifos ethyl and its degradation derivatives by Pseudomonas peli strain isolated from the Oued Hamdoun River (Tunisia).

    Science.gov (United States)

    Dellai, Afef; Dridi, Dorra; Sakouhi, Seif; Robert, Jacques; Djelal, Hayet; Mosrati, Ridha; Cherif, Ameur; Mansour, Hedi Ben

    2016-04-01

    A bacterium was isolated from the river of Oued Hamdoun (Tunisia), and its phenotypic features, physiological and chemotaxonomic characteristics and phylogenetic analysis of 16S ribosomal RNA sequence revealed it as Pseudomonas peli (P. peli). Chlorpyrifos ethyl (CP) was used as the sole source of carbon and energy by P. peli, and it was cometabolised in the presence of glucose. CP was completely degraded by P. peli after 96 h of shake incubation. High-performance liquid chromatography analysis indicated that the biodegradation kinetics was not affected by the addition of glucose into the culture medium. In the present study, only transient accumulation of one major no-identified product was observed after 48 h of incubation, with no other persistent metabolites detected. Cytotoxicity of CP, before and after biodegradation with P. peli, was evaluated in vitro using the MTT-colorimetric assay against three human cancer cell lines (A549, lung cell carcinoma, HT29, colon adenocarcinoma and MCF7, breast adenocarcinoma). CP reduced viability of all human cell lines in a dose-dependent manner. Its activity was very remarkable against A549 cell line. However, cytotoxicity strongly decreased in CP obtained after incubation with P. peli Hence, we conclude that when incubated under appropriate conditions,P. peli has a metabolism that completely detoxifies CP.

  12. Design study of primary ion provider for relativistic heavy ion collider electron beam ion source.

    Science.gov (United States)

    Kondo, K; Kanesue, T; Tamura, J; Okamura, M

    2010-02-01

    Brookhaven National Laboratory has developed the new preinjector system, electron beam ion source (EBIS) for relativistic heavy ion collider (RHIC) and National Aeronautics and Space Administration Space Radiation Laboratory. Design of primary ion provider is an essential problem since it is required to supply beams with different ion species to multiple users simultaneously. The laser ion source with a defocused laser can provide a low charge state and low emittance ion beam, and is a candidate for the primary ion source for RHIC-EBIS. We show a suitable design with appropriate drift length and solenoid, which helps to keep sufficient total charge number with longer pulse length. The whole design of primary ion source, as well as optics arrangement, solid targets configuration and heating about target, is presented.

  13. RPPN, ECO TURISMO, POPULAÇÕES TRADICIONAIS E/OU RESIDENTES: DILEMAS DE UMA POLÍTICA DE ÁREAS PARTICULARES PROTEGIDAS

    Directory of Open Access Journals (Sweden)

    Isis Maria Cunha Lustosa

    2005-12-01

    Full Text Available O artigo versa sobre a (UC Unidade de Conservação– (RPPN Reserva Particular do Patrimônio Natural e oEcoturismo como elementos de discussão – se há porparte da legislação de áreas protegidas particulares ocompromisso do reconhecimento das populações tradicionaise/ou residentes, bem como da efetiva participaçãodestas na conservação da natureza em RPPN tomando-se como base artigos do Decreto nº 1922/05.06.1996e da Lei nº 9.985/18.07.2000 do (SNUC Sistema Nacionalde Unidades de Conservação, o qual, insere a RPPNcomo área protegida oficial de propriedade particular reconhecidapelo (IBAMA Instituto Brasileiro de RecursosNaturais Renováveis, em âmbito federal, ou por órgãosestaduais do meio ambiente. Essa área é reconhecidatotal ou parcial por decisão do proprietário, permanecena sua posse e domínio com gravame de perpetuidade.O IBAMA considera que a RPPN proteja os recursosambientais pela relevância da sua biodiversidade, peloaspecto paisagístico ou por características ambientaisque justifiquem sua recuperação, concebendo-a atividadesque julgam não interferir negativamente na biodiversidade– a educação ambiental, os projetos científicose o turismo ecológico. Ou: a RPPN é mais um espaçoemergente em prol da turistificação de área protegidacriada na ideologia do ecoturismo?

  14. Ion-ion reactions for charge reduction of biopolymer at atmospheric pressure ambient

    Institute of Scientific and Technical Information of China (English)

    Yue Ming Zhou; Jian Hua Ding; Xie Zhang; Huan Wen Chen

    2007-01-01

    Extractive electrospray ionization source (EESI) was adapted for ion-ion reaction, which was demonstrated by using a linear quadrupole ion trap mass spectrometer for the first ion-ion reaction of biopolymers in the atmospheric pressure ambient.

  15. Improving Ion Computed Tomography

    DEFF Research Database (Denmark)

    Hansen, David Christoffer

    2014-01-01

    -HIT, og de blev tilpasset eksperimentelle tværsnit. Modellerne passede godt med eksperimentelle målinger af kernefragmentation af kulstof i vand, hvorimod der var større afvigelser for neon. I tidligere undersøgelser af ion CT med ioner tungere end brint har dosis altid været meget høj, i flere tilfælde...... der normalt bruges ved røntgen CT, gav både helium og kulstof CT billeder med højere opløsning og mindre støj. Et alternativ til ion CT er "dual energy CT", dvs røntgen CT ved to forskellige bølgelængder. Dette giver også mulighed for en bedre bestemmelse af partiklernes rækkevidde, og der blev derfor...

  16. Trapping ions with lasers

    CERN Document Server

    Cormick, Cecilia; Morigi, Giovanna

    2010-01-01

    This work theoretically addresses the trapping an ionized atom with a single valence electron by means of lasers, analyzing qualitatively and quantitatively the consequences of the net charge of the particle. In our model, the coupling between the ion and the electromagnetic field includes the charge monopole and the internal dipole, within a multipolar expansion of the interaction Hamiltonian. Specifically, we perform a Power-Zienau-Woolley transformation, taking into account the motion of the center of mass. The net charge produces a correction in the atomic dipole which is of order $m_e/M$ with $m_e$ the electron mass and $M$ the total mass of the ion. With respect to neutral atoms, there is also an extra coupling to the laser field which can be approximated by that of the monopole located at the position of the center of mass. These additional effects, however, are shown to be very small compared to the dominant dipolar trapping term.

  17. Relativistic heavy ion reactions

    Energy Technology Data Exchange (ETDEWEB)

    Brink, D.M.

    1989-08-01

    The theory of quantum chromodynamics predicts that if nuclear matter is heated to a sufficiently high temperature then quarks might become deconfined and a quark-gluon plasma could be produced. One of the aims of relativistic heavy ion experiments is to search for this new state of matter. These lectures survey some of the new experimental results and give an introduction to the theories used to interpret them. 48 refs., 4 tabs., 11 figs.

  18. Ion Trap Quantum Computing

    Science.gov (United States)

    2011-12-01

    an inspiring speech at the MIT Physics of Computation 1st Conference in 1981, Feynman proposed the development of a computer that would obey the...on ion trap based 36 quantum computing for physics and computer science students would include lecture notes, slides, lesson plans, a syllabus...reading lists, videos, demonstrations, and laboratories. 37 LIST OF REFERENCES [1] R. P. Feynman , “Simulating physics with computers,” Int. J

  19. Cooled Ion Frequency Standard.

    Science.gov (United States)

    2014-09-26

    when the cooling laser is turned off, the ions are heated by: (1) background gas collisions and (2) a plasma heating process which may be " resonant ...causes heating in our Penning traps. One way resonant particle transport is mediated is by misalignm.nt between the trap’s magnetic and electric axis...using computer solutions. The trap of Fig. 1 is noteworthy because although the inner surfaces of the trap are machined with simple conical cuts, the

  20. Novel laser ion sources

    CERN Document Server

    Fournier, P; Kugler, H; Lisi, N; Scrivens, R; Rodríguez, F V; Düsterer, S; Sauerbrey, R; Schillinger, H; Theobald, W; Veisz, L; Tisch, J W G; Smith, R A

    2000-01-01

    Development in the field of high-power laser systems with repetition rates of several Hz and energies of few joules is highly active and opening, giving new possibilities for the design of laser ions sources. Preliminary investigations on the use of four different laser and target configurations are presented: (1) A small CO/sub 2/ laser (100 mJ, 10.6 mu m) focused onto a polyethylene target to produce C ions at 1 Hz repetition rate (CERN). (2) An excimer XeCl laser (6 J, 308 nm) focused onto solid targets (Frascati). (3) A femtosecond Ti: sapphire laser (250 mJ, 800 nm) directed onto a solid targets (Jena). (4) A picosecond Nd: yttrium-aluminum-garnet (0.3 J, 532 nm) focused into a dense medium of atomic clusters and onto solid targets (London). The preliminary experimental results and the most promising schemes will be discussed with respect to the scaling of the production of high numbers of highly charged ions. Different lasers are compared in terms of current density at 1 m distance for each charge state...

  1. Ion channeling revisited

    Energy Technology Data Exchange (ETDEWEB)

    Doyle, Barney Lee [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Corona, Aldo [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Nguyen, Anh [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2014-09-01

    A MS Excel program has been written that calculates accidental, or unintentional, ion channeling in cubic bcc, fcc and diamond lattice crystals or polycrystalline materials. This becomes an important issue when simulating the creation by energetic neutrons of point displacement damage and extended defects using beams of ions. All of the tables and graphs in the three Ion Beam Analysis Handbooks that previously had to be manually looked up and read from were programed into Excel in handy lookup tables, or parameterized, for the case of the graphs, using rather simple exponential functions with different powers of the argument. The program then offers an extremely convenient way to calculate axial and planar half-angles and minimum yield or dechanneling probabilities, effects on half-angles of amorphous overlayers, accidental channeling probabilities for randomly oriented crystals or crystallites, and finally a way to automatically generate stereographic projections of axial and planar channeling half-angles. The program can generate these projections and calculate these probabilities for axes and [hkl] planes up to (555).

  2. Ion Collision, Theory

    Energy Technology Data Exchange (ETDEWEB)

    Shukla, Anil K.

    2013-09-11

    The outcome of a collision between an ion and neutral species depends on the chemical and physical properties of the two reactants, their relative velocities, and the impact parameter of their trajectories. These include elastic and inelastic scattering of the colliding particles, charge transfer (including dissociative charge transfer), atom abstraction, complex formation and dissociation of the colliding ion. Each of these reactions may be characterized in terms of their energy-dependent rate coefficients, cross sections and reaction kinetics. A theoretical framework that emphasizes simple models and classical mechanics is presented for these processes. Collision processes are addressed in two categories of low-energy and high-energy collisions. Experiments under thermal or quasi-thermal conditions–swarms, drift tubes, chemical ionization and ion cyclotron resonance are strongly influenced by long-range forces and often involve collisions in which atom exchange and extensive energy exchange are common characteristics. High-energy collisions are typically impulsive, involve short-range intermolecular forces and are direct, fast processes.

  3. Le Baratze (ou

    Directory of Open Access Journals (Sweden)

    Jacques Blot

    1998-01-01

    Full Text Available El círculo de piedras Mendizabal 7, de 8 metros de diámetro,   presenta una corona externa constituida de grandes bloques   hincados en la tierra, y otra interna y tangente, de elementos idénticos sólo puestos en el suelo. El cajón central está compuesto de cuatro losas y una tapa. No hay depósito de huesos ni de carbón de leña ; sólo se encuentran dos herraduras, entre las cuales una completa de tipo medieval, que podrían permitir de pensar en una construcción del círculo en el periodo histórico.

  4. Interdisciplinaridade: funcionalidade ou utopia?

    Directory of Open Access Journals (Sweden)

    Maria Cecília de Souza Minayo

    1994-12-01

    Full Text Available Este artigo levanta uma discussão teórica sobre várias visões a respeito de Interdisciplinaridade. Analisa-se a visão humanitária defendida por GUSDORF, que critica o esfacelamento do saber parcelizado, buscando a raiz de um conhecimento integrado e unitário na Grécia antiga. Aborda também o pensamento crítico de CARNEIRO LEÃO e outros autores que refletem sobre a funcionalidade da interdisciplinaridade na ciência e tecnologia modernas. E termina com a teoria da ação comunicativa de HABERMAS que propõe a articulação entre a filosofia, a ciência e o mundo da vida como uma nova forma de relação dialética entre o sujeito e objeto na construção do conhecimento. Trata-se de um artigo que mais propõe questões que soluções, dando pistas para a abordagem de situações concretas para a área da saúde onde não só é crucial a integração de disciplinas como a multiprofissionalidade.

  5. Paris ou la francophonie

    DEFF Research Database (Denmark)

    Verstraete Hansen, Lisbeth

    2014-01-01

    , but the recommendations more often deal with language acquisition and communicative competence than with course content. Through the examination of the presence of the “Francophonie” in official documents relating to the elementary school, high school and university training of future teachers for the upper secondary...

  6. Guelaya ou Qelaya

    OpenAIRE

    Al Figuigui, H.

    2012-01-01

    Tribu marocaine appartenant géographiquement au Rif Oriental, occupant l’angle nord-est de l’actuelle province de Nador qui regroupe les villes de Melilla/Malîla (sous l’autorité de l’Espagne), Nador, capitale de la province, Azghanghan et Salwân. Le territoire occupe une superficie de 984 km2. La tribu apparaît aujourd’hui dans le régime administratif local sous la dénomination Cercle de Guelaya. Le nom de Guelaya Ce nom dérive du mot arabe al-qalâ’, pluriel d’al-qal’at. L’histoire médiévale...

  7. Antibióticos em tonsilectomias: terapêutico ou profilático? Necessário ou abusivo? Antibiotic use in tonsillectomies: therapeutic or prophylactic? Required or excessive?

    Directory of Open Access Journals (Sweden)

    Otávio Bejzman Piltcher

    2005-10-01

    Full Text Available A adenotonsilectomia é uma das cirurgias mais comumente realizadas na população pediátrica e adulta jovem. A morbidade pós-operatória de tal procedimento cirúrgico é importante incluindo odinofagia, disfagia, otalgia, febre, halitose, perda ponderal e redução da aceitação por via oral. Após a tonsilectomia, com ou sem adenoidectomia, a colonização da loja tonsilar aberta pela flora bacteriana oral causaria uma exacerbação da reação inflamatória local, piorando a dor pós-operatória. A hipótese de que a redução da população bacteriana na ferida cirúrgica aberta possa diminuir a inflamação local, promover o processo cicatricial e acelerar a recuperação pós-operatória determinou inúmeros estudos que abordaram a relação entre o uso perioperatório de antibióticos e a morbidade pós-operatória da adenotonsilectomia. Apesar desses estudos se definirem como avaliadores do uso profilático cirúrgico de antibióticos nessas cirurgias, não houve seguimento das normas de antibioticoprofilaxia cirúrgica internacionalmente aceitas, sendo que a maioria utiliza antibióticos por sete dias pós-operatórios. Através de uma revisão crítica da literatura, os autores discutem os prós e contras do uso de antibiótico nas tonsilectomias ou adenotonsilectomias, assim como a correta definição para sua utilização.Adenotonsillectomy is one of the most commonly performed surgeries in the pediatric and young adult populations. The postoperative morbidity of this surgical procedure is often significant, including odynophagia, dysphagia, fever, halitosis, loss of weight and reduced oral intake. After tonsillectomy, with or without adenoidectomy, the colonization of the open tonsillar fossae by the bacterial population of the oral cavity would cause an exacerbation of the local inflammatory response worsening postoperative pain. The hypothesis that a reduction of the bacterial population of an open surgical wound could

  8. Aerobic stability of triticale silage in single culture or in mixtures with oat and/or legumes Estabilidade aeróbia de silagens de triticale em cultivo exclusivo ou em misturas com aveia e/ou leguminosas

    Directory of Open Access Journals (Sweden)

    Valter Harry Bumbieris Junior

    2010-11-01

    Full Text Available The objective of the present study was to evaluate the aerobic stability and losses during the fermentation process of triticale silages in single crop or in mixtures with oats and/or legumes. The following crops were used for silage production: triticale (X. Triticosecale Wittimack, triticale intercropped with forage pea (Pisum arvense and triticale intercropped with oats (Avena strigosa Schreb, forage pea and vetch (Vicia sativa. The dry matter content and its recovery did not differ among the silages. Buffer capacity was higher for tricale silage intercropped with oats, forage pea and vetch(88.67 m eq. NaOH/100 g DM followed by triticale intercropped with forage pea (80.80 m eq. NaOH/100 g DM. Electric conductivity values were higher in the intercropped triticale silages. Triticale silage presented the lowest temperatures observed in the silos, and the silages of intercropped triticale silages presented higher heat retention and higher pH values. Silage of triticale intercropped with oats and legumes presented lower aerobic stability but it did not reduce the aerobic stability of the total feed. Dry matter recovery during storage and in stability evaluations in aerobiosis is similar among the silages.O objetivo neste trabalho foi avaliar a estabilidade aeróbia e as perdas durante o processo de fermentação de silagens de triticale em cultivo exclusivo ou em misturas com aveia e/ou leguminosas. As culturas utilizadas para produção das silagens foram: triticale (X. Triticosecale Wittimack; triticale em consórcio com ervilha-forrageira (Pisum arvense; e triticale em consórcio com aveia (Avena strigosa Schreb, ervilha-forrageira e ervilhaca (Vicia sativa. O teor de matéria seca e a recuperação de matéria seca não diferiram entre as silagens. A capacidade tampão foi maior para a silagem de triticale cultivado em consórcio com aveia, ervilha-forrageira e ervilhaca (88,67 m eq. NaOH/100 g de MS, seguida da silagem de triticale cultivado

  9. Produção in vitro de embriões bovinos com soro de égua ou de vaca em estro com ou sem a adição de LH/FSH

    Directory of Open Access Journals (Sweden)

    Figueiró Giuliano Moraes

    2004-01-01

    Full Text Available Mil duzentos e setenta e um oócitos foram divididos em 4 tratamentos com a finalidade de se avaliar a influência da adição de LH e FSH na produção in vitro de embriões bovinos com soro de vaca em estro (SVE ou soro de éguas obtido no 1masculine dia do estro (SE. Independente do tratamento os oócitos foram maturados com TCM199 + 5,95mg/ml de Hepes, 0,025mg/ml de piruvato de sódio e 2,2mg/ml de bicarbonato de sódio, sendo adicionado 10% de soro de égua (ES, 10% de SVE (VS, 10% de soro de égua + 0,5mg/ml de hormônio luteinizante bovino (LHb + 0,01UI/ml de hormônio folículo estimulante recombinante humano-rFSHh (EH e 10% SVE + LHb + rFSHh (VH. Os oócitos assim tratados, foram maturados em estufa com 5% de CO2 a 39masculineC sob umidade saturada por 22-24h. Depois, foram fecundados em TALP-FERT por 18-20h e cultivados por 8 dias em meio SOF + 5% de SE (ES e EH ou SVE (VS e VH. As taxas de clivagem de 72% obtidas no grupo VH (229/316 e 61% no grupo VS (193/315 foram significativamente menores (p<0,05 que as dos grupos ES (80% - 254/317 e EH (80% - 257/323. A produção de embriões (blastocistos iniciais, blastocistos, blastocistos expandidos e eclodidos no D7 após a inseminação para os grupos ES (32%, EH (28% e VH (27%, foi significativamente superior aos 20% obtidos no VS (p<0,05. No D9, verificou-se uma diferença significativa (p<0,05 entre os grupos ES (31% e EH (29% quando comparados com o grupo VS (22%, mas não houve diferença quando comparamos com o VH (24%. A taxa de eclosão em D9 foi de 11% (ES, 11% (EH, 10% (VS e 5% (VH. Não houve diferença entre as médias do número de células dos embriões (Blastocistos expandidos e eclodidos obtidos no D9. Conclui-se, com estes resultados que, para a obtenção de taxas regulares de blastocistos, não seja necessária a adição de hormônios quando se utilize o soro de égua, e que os hormônios devam ser adicionados quando se utilize soro de vaca.

  10. O método mézières ou a revolução na ginástica ortopédica: o manifesto anti-desportivo ou a nova metodologia de treino

    Directory of Open Access Journals (Sweden)

    Luís Coelho

    2008-06-01

    Full Text Available Em termos ditos ‘músculo-esqueléticos’, pode considerar-se que o conhecimento dos métodos de fisioterapia que consubstanciam teorética e pragmaticamente a “intervenção postural” constitui uma base de sapiência fundamental para a boa prestação do profissional de “educação física” e o profissional de saúde especializado. Dentro das abordagens de natureza fisioterapêutica, diversos métodos de tratamento podem ser utilizados, sendo que os mesmos podem ser divididos em duas grandes categorias: tratamentos analíticos (centrados fundamentalmente nos sintomas do doente e realizados sobretudo a nível local e tratamentos holísticos (centrados na causa dos sintomas do doente e realizados a nível global. Os tratamentos holísticos aparecem substanciados na forma de métodos mais ou menos globais que tendem a ver a pessoa como um todo inextricável. No contexto do presente artigo, são considerados tratamentos ditos holísticos todos aqueles que centram a sua acção num ponto de análise da estrutura corporal do sujeito, vista como um todo. Falamos, nomeadamente, na postura corporal e, portanto, nos métodos de intervenção postural (e mais precisamente de Reeducação postural. Neste contexto, surgem as dificuldades de definição operacional do conceito de Postura e de Reeducação Postural que tentaremos ultrapassar num primeiro momento do texto. (…

  11. Resonance Ionization Laser Ion Sources

    CERN Document Server

    Marsh, B

    2013-01-01

    The application of the technique of laser resonance ionization to the production of singly charged ions at radioactive ion beam facilities is discussed. The ability to combine high efficiency and element selectivity makes a resonance ionization laser ion source (RILIS) an important component of many radioactive ion beam facilities. At CERN, for example, the RILIS is the most commonly used ion source of the ISOLDE facility, with a yearly operating time of up to 3000 hours. For some isotopes the RILIS can also be used as a fast and sensitive laser spectroscopy tool, provided that the spectral resolution is sufficiently high to reveal the influence of nuclear structure on the atomic spectra. This enables the study of nuclear properties of isotopes with production rates even lower than one ion per second and, in some cases, enables isomer selective ionization. The solutions available for the implementation of resonance laser ionization at radioactive ion beam facilities are summarized. Aspects such as the laser r...

  12. ION SOURCES FOR ENERGY EXTREMES OF ION IMPLANTATION.

    Energy Technology Data Exchange (ETDEWEB)

    HERSCHCOVITCH,A.; JOHNSON, B.M.; BATALIN, V.A.; KROPACHEV, G.N.; KUIBEDA, R.P.; KULEVOY, T.V.; KOLOMIETS, A.A.; PERSHIN, V.I.; PETRENKO, S.V.; RUDSKOY, I.; SELEZNEV, D.N.; BUGAEV, A.S.; GUSHENETS, V.I.; LITOVKO, I.V.; OKS, E.M.; YUSHKOV, G. YU.; MASEUNOV, E.S.; POLOZOV, S.M.; POOLE, H.J.; STOROZHENKO, P.A.; SVAROVSKI, YA.

    2007-08-26

    For the past four years a joint research and development effort designed to develop steady state, intense ion sources has been in progress with the ultimate goal to develop ion sources and techniques, which meet the two energy extreme range needs of mega-electron-volt and 100's of electron-volt ion implanters. This endeavor has already resulted in record steady state output currents of high charge state of Antimony and Phosphorous ions: P{sup 2+} (8.6 pmA), P{sup 3+} (1.9 pmA), and P{sup 4+} (0.12 pmA) and 16.2, 7.6, 3.3, and 2.2 pmA of Sb{sup 3+} Sb{sup 4+}, Sb{sup 5+}, and Sb{sup 6+} respectively. For low energy ion implantation our efforts involve molecular ions and a novel plasmaless/gasless deceleration method. To date, 1 emA of positive Decaborane ions were extracted at 10 keV and smaller currents of negative Decaborane ions were also extracted. Additionally, Boron current fraction of over 70% was extracted from a Bemas-Calutron ion source, which represents a factor of 3.5 improvement over currently employed ion sources.

  13. Characterization of ion dynamics in structures for lossless ion manipulations.

    Science.gov (United States)

    Tolmachev, Aleksey V; Webb, Ian K; Ibrahim, Yehia M; Garimella, Sandilya V B; Zhang, Xinyu; Anderson, Gordon A; Smith, Richard D

    2014-09-16

    Structures for Lossless Ion Manipulation (SLIM) represent a novel class of ion optical devices based upon electrodes patterned on planar surfaces, and relying on a combined action of radiofrequency and DC electric fields and specific buffer gas density conditions. Initial experimental studies have demonstrated the feasibility of the SLIM concept. This report offers an in-depth consideration of key ion dynamics properties in such devices based upon ion optics theory and computational modeling. The SLIM devices investigated are formed by two surfaces, each having an array of radiofrequency (RF) "rung" electrodes, bordered by DC "guard" electrodes. Ion motion is confined by the RF effective potential in the direction orthogonal to the boards and limited or controlled in the transversal direction by the guard DC potentials. Ions can be efficiently trapped and stored in SLIM devices where the confinement of ions can be "soft" in regard to the extent of collisional activation, similarly to RF-only multipole ion guides and traps. The segmentation of the RF rung electrodes and guards along the axis makes it possible to apply static or transient electric field profiles to stimulate ion transfer within a SLIM. In the case of a linear DC gradient applied to RF rungs and guards, a virtually uniform electric field can be created along the axis of the device, enabling high quality ion mobility separations.

  14. Ion sources for energy extremes of ion implantation.

    Science.gov (United States)

    Hershcovitch, A; Johnson, B M; Batalin, V A; Kropachev, G N; Kuibeda, R P; Kulevoy, T V; Kolomiets, A A; Pershin, V I; Petrenko, S V; Rudskoy, I; Seleznev, D N; Bugaev, A S; Gushenets, V I; Litovko, I V; Oks, E M; Yushkov, G Yu; Masunov, E S; Polozov, S M; Poole, H J; Storozhenko, P A; Svarovski, A Ya

    2008-02-01

    For the past four years a joint research and development effort designed to develop steady state, intense ion sources has been in progress with the ultimate goal to develop ion sources and techniques that meet the two energy extreme range needs of meV and hundreads of eV ion implanters. This endeavor has already resulted in record steady state output currents of high charge state of antimony and phosphorus ions: P(2+) [8.6 pmA (particle milliampere)], P(3+) (1.9 pmA), and P(4+) (0.12 pmA) and 16.2, 7.6, 3.3, and 2.2 pmA of Sb(3+)Sb(4+), Sb(5+), and Sb(6+) respectively. For low energy ion implantation, our efforts involve molecular ions and a novel plasmaless/gasless deceleration method. To date, 1 emA (electrical milliampere) of positive decaborane ions was extracted at 10 keV and smaller currents of negative decaborane ions were also extracted. Additionally, boron current fraction of over 70% was extracted from a Bernas-Calutron ion source, which represents a factor of 3.5 improvement over currently employed ion sources.

  15. Electron string ion sources for carbon ion cancer therapy accelerators

    CERN Document Server

    Boytsov, A Yu; Donets, E D; Donets, E E; Katagiri, K; Noda, K; Ponkin, D O; Ramzdorf, A Yu; Salnikov, V V; Shutov, V B

    2015-01-01

    The Electron String type of Ion Sources (ESIS) was developed, constructed and tested first in the Joint Institute for Nuclear Research. These ion sources can be the appropriate sources for production of pulsed C4+ and C6+ ion beams which can be used for cancer therapy accelerators. In fact the test ESIS Krion-6T already now at the solenoid magnetic field only 4.6 T provides more than 10^10 C4+ ions per pulse and about 5*10^9 C6+ ions per pulse. Such ion sources could be suitable for application at synchrotrons. It was also found, that Krion-6T can provide more than 10^11 C6+ ions per second at 100 Hz repetition rate, and the repetition rate can be increased at the same or larger ion output per second. This makes ESIS applicable at cyclotrons as well. As for production of 11C radioactive ion beams ESIS can be the most economic kind of ion source. To proof that the special cryogenic cell for pulse injection of gaseous species into electron string was successfully tested using the ESIS Krion-2M.

  16. Liquid metal ion source assembly for external ion injection into an electron string ion source (ESIS)

    Energy Technology Data Exchange (ETDEWEB)

    Segal, M. J., E-mail: mattiti@gmail.com [iThemba LABS, P.O. Box 722, Somerset West 7130 (South Africa); University of Cape Town, Rondebosch, Cape Town 7700 (South Africa); Bark, R. A.; Thomae, R. [iThemba LABS, P.O. Box 722, Somerset West 7130 (South Africa); Donets, E. E.; Donets, E. D.; Boytsov, A.; Ponkin, D.; Ramsdorf, A. [Joint Institute for Nuclear Research, Joloit-Curie 6, 141980 Dubna, Moscow Region (Russian Federation)

    2016-02-15

    An assembly for a commercial Ga{sup +} liquid metal ion source in combination with an ion transportation and focusing system, a pulse high-voltage quadrupole deflector, and a beam diagnostics system has been constructed in the framework of the iThemba LABS (Cape Town, South Africa)—JINR (Dubna, Russia) collaboration. First, results on Ga{sup +} ion beam commissioning will be presented. Outlook of further experiments for measurements of charge breeding efficiency in the electron string ion source with the use of external injection of Ga{sup +} and Au{sup +} ion beams will be reported as well.

  17. Produção do Superprecoce a Partir de Bezerros Desmamados aos 72 ou 210 Dias de Idade

    Directory of Open Access Journals (Sweden)

    Restle João

    2002-01-01

    Full Text Available O experimento foi conduzido com o objetivo de avaliar o desempenho em confinamento, dos 210 aos 408 dias de idade, de bezerros previamente desmamados aos 72 (T72 ou 210 (T210 dias. Foram utilizados 36 machos não castrados da raça Braford (5/8 Hereford 3/8 Nelore. O peso médio no início do experimento foi de 209 kg (T72 e 192 kg (T210. O confinamento compreendeu 30 dias de adaptação dos animais e 168 dias de avaliação, sendo dividido em quatro períodos de 42 dias. A relação volumoso:concentrado foi de 60:40 para o 1º e 2º períodos, 50:50 para o 3º período e 45:55 para o 4º período. Não houve interação entre idade de desmame e período de avaliação em confinamento para os parâmetros relativos aos consumos médios por animal de matéria seca (CMS e de energia digestível (CED, expressos em kg/dia e Mcal/dia (CMSD e CEDD, por 100 kg de peso vivo (CMSP e CEDP e por unidade de tamanho metabólico (CMSM e CEDM, ao ganho de peso médio diário (GMD, à conversão alimentar (CA e eficiência energética (EE. Animais desmamados aos 210 dias apresentaram maiores CMSP (2,25 contra 2,07% PV e CEDP (7,05 contra 6,48% PV em relação aos animais desmamados ao 72 dias de idade. Não houve diferença no CMSD (6,75 contra 6,98 kg/dia, no GMD (1,066 contra 1,074 kg/dia, na eficiência de conversão da matéria seca (6,42 contra 6,72 kg de MS/kg ganho de PV e da energia digestível consumida (20,18 contra 21,13 Mcal/kg ganho de PV em ganho de peso vivo para os animais desmamados aos 72 ou 210 dias de idade, respectivamente. Os pesos de abate e de carcaça quente foram similares entre as duas idades, sendo, respectivamente, de 424 e 232 kg para os animais do T72 e de 406 e 221 kg para dos T210. Os resultados mostram que animais desmamados aos 72 dias de idade apresentaram desempenho durante a terminação, pesos de abate e de carcaça similares aos desmamados aos 210 dias.

  18. Laranja Mecânica: violência ou violação? Clockwork Orange: violence or violation?

    Directory of Open Access Journals (Sweden)

    Paulo Menezes

    1997-10-01

    Full Text Available O artigo investiga o filme Laranja Mecânica de Stanley Kubrick, realizado em 1971. Ao contrário das análises tradicionais, que buscam ver nesse filme um libelo contra a violência - ou, curiosamente, uma apologia desta mesma violência -, propõe-se uma interpretação que caminha em direção dos fundamentos visuais que constroem no espectador essa percepção de "violência", ressaltando-se aí primordialmente os valores que são colocados em questão pelas imagens que o filme nos mostra. Propõe-se, portanto, um redirecionamento analítico de um filme muito visto e discutido, explicitando-se outros elementos em jogo, bem como a maneira pelas quais esses elementos são expostos aos olhos do público, construindo-se, então, uma nova dimensão de significados inesperadosThe article analyzes the film Clockwork Orange by Stanley Kubrick, made in 1971. In opposition to the traditional analyses which try to see this film as a libel against violence - or curiously, an apology for this same violence -, the purpose here is to give an interpretation which follows the visual fundaments that render the spectator this perception of "violence", emphasizing there mainly the values put into evidence by the images the film shows us. Consequently an analytical redirectioning of well-watched and discussed film is suggested, and other fundamental elements are brought to light as well as the manner by which these elements are exposed to the audience, in order to build up a new dimension of unexpected meanings.

  19. Modelo de negócios: constructo real ou metáfora de estratégia?

    Directory of Open Access Journals (Sweden)

    Luiz Antonio Joia

    Full Text Available Este artigo analisa a discussão sobre os termos "modelo de negócios" e "estratégia", e seu principal objetivo é verificar se esses conceitos são distintos ou não. A maioria dos estudos até agora realizados defendem a tese de que sejam diferentes. O objetivo deste artigo é testar a veracidade dessa hipótese. Para isso, são comparadas abordagens consolidadas de estratégia, como a da escola de posicionamento e a visão baseada em recursos (resource-based view-RBV, com as definições de vários autores para o termo "modelo de negócios". Usando-se análise interpretativa de viés hermenêutico, conclui-se que os constructos não são totalmente diferentes, i.e., que existe sobreposição e nível de similaridade entre Estratégia e Modelo de Negócio. Da mesma forma, verifica-se que modelo de negócios é um instrumento dinâmico e sistêmico para várias abordagens de estratégia. Isso possibilita entrelaçá-las numa única definição, aumentando o potencial dessas abordagens para explicar e orientar o processo estratégico real das organizações.

  20. Investigação da atividade abortiva e/ou infertilizante de Stryphnodendron adstringens (Mart. Coville

    Directory of Open Access Journals (Sweden)

    Marilise Escobar Bürger

    1999-01-01

    Full Text Available Stryphnodendron adstringens (barbatimão é uma árvore natural dos Estados do Pará ao Mato Grosso do Sul e São Paulo (Brasil. O objetivo deste estudo foi determinar a toxicidade dos extratos das vagens desta espécie e verificar efeitos sobre a gestação de ratas. As vagens foram coletadas na região de Cuiabá (MT, Brasil e separadas em cascas e sementes. Foram feitos extratos brutos hidroalcoólicos (2:1, a frio e depois levados à secura (máximo 55°C. Ratas fêmeas virgens foram acasaladas e receberam extratos (0,5 ml/100 g de peso, 100 g/l ou água na mesma proporção (controle por gavagem do 1° ao 7° dia de gestação. No 7° dia, foram feitas laparatomias para contagem do número de implantes uterinos. As ratas foram sacrificadas no 21° dia de gestação. Os extratos das sementes reduziram o peso do útero e o número de fetos vivos em relação ao grupo controle. A dose média letal (DL50 calculada para o extrato das sementes foi de 4.992,8 mg/kg. A DL50 do extrato das vagens foi maior que 5.000 mg/kg. Pode-se concluir que o extrato das sementes de S. adstringens interfere na gestação de ratas, sendo que esta ingestão pode prejudicar animais herbívoros.

  1. Uma questão para a educacão inclusiva: expor-se ou resguardar-se?

    Directory of Open Access Journals (Sweden)

    Marie Claire Sekkel

    Full Text Available Este artigo discute as relações entre os atores institucionais que participam de uma proposta de educação escolar inclusiva. Com essa finalidade, foram utilizados recortes dos dados coletados em uma pesquisa sobre a construção de ambientes inclusivos, realizada em uma escola municipal de educação infantil em São Paulo, no período de 2006 a 2008. Os dados foram organizados em torno da questão expor-se ou resguardar-se?, que dá visibilidade aos movimentos presentes nas relações institucionais. A pesquisa utilizou a etnografia como método de coleta de dados, e a análise foi feita com base no referencial da teoria crítica da sociedade. Os resultados apontam a presença do sentimento de ameaça, que gera a necessidade de resguardo, e também de situações de abertura à experiência no trabalho desenvolvido com as crianças, que pressupõem a necessidade de expor-se diante de si e do(s outro(s. Segundo autores da Escola de Frankfurt, a origem desse sentimento de ameaça é social, e o medo deve tornar-se consciente para que seus efeitos destrutivos para o indivíduo e para as relações sociais possam ser evitados. A abertura à experiência, por outro lado, é necessária para a produção de uma consciência verdadeira, que é o principal objetivo da educação segundo Theodor Adorno, e deve ser considerada elemento fundamental para os processos educacionais inclusivos.

  2. Indicadores de Desenvolvimento em Crianças e Adolescentes com QI Igual ou Inferior a 70

    Directory of Open Access Journals (Sweden)

    Fernanda Santos SOUZA

    Full Text Available RESUMO: este estudo teve o objetivo de buscar indicadores de desenvolvimento em crianças e adolescentes com dificuldades para aprender, com QI igual ou inferior a 70 no teste WISC-IV (compatível com o valor delimitado para o diagnóstico de deficiência intelectual. Fundamentou-se na perspectiva histórico-cultural do desenvolvimento humano proposta por Vygotsky, especialmente no que se refere à distinção entre desenvolvimento real e potencial. Foram relatados estudos de caso com duas crianças. A coleta de dados ocorreu a partir de gravações em áudio de entrevistas semiestruturadas com os pais/responsáveis e com os profissionais da escola em que os participantes estavam matriculados, e gravações em vídeo das sessões de atendimento de um serviço de educação não formal que as crianças participavam regularmente. A análise de dados envolveu transcrição das entrevistas e elaboração de quadros com os modos de participação social e processos mentais superiores relatados, de cada criança/adolescente; exame das filmagens das sessões de atendimento, com transcrição e análise microgenética de episódios significativos. Os dados sugerem que, ao se enfatizar a busca de indicadores de desenvolvimento, pode-se obter uma visão abrangente de cada caso, de forma a contemplar, para além das limitações, as potencialidades das crianças e dos adolescentes.

  3. Desempenho e características da carcaça de novilhos terminados em pastejo rotacionado ou em confinamento

    Directory of Open Access Journals (Sweden)

    D.O. Olmedo

    2011-04-01

    Full Text Available Foram avaliados o desempenho e as características de carcaça de 36 novilhos Brahman (Bh, Brangus (Bg e Hereford adaptado (He, terminados em pastejo com suplementação (PSu ou em confinamento (Conf. Os animais foram abatidos quando apresentavam espessura de gordura maior do que 4mm. Na dieta do Conf, a relação volumoso:concentrado foi de 60:40 (com base na matéria seca, continha 13% de proteína bruta (PB e 62% de nutrientes digestíveis totais (NDT. O capim-mombaça continha, em média, 7% de PB e 54% de NDT, e o suplemento 24% de PB e 76% de NDT. Foi observada diferença (P<0,05 no sistema de terminação para o ganho de peso médio diário, com 1,200kg/cab/dia para Conf e 0,675kg/cab/dia para Psu. Os novilhos Bh e Bg pesaram, em média, 445,8kg, e o rendimento da carcaça quente foi de 58,4%, valores maiores que os 399,1kg e 55,4% obtidos pelos animais He. A área de olho de Longissimus foi maior para os animais Bg, 76,42cm². A maciez, 3,71 vs 4,89, e a espessura de gordura subcutânea, 4,64 vs 3,39, foram melhores nos animais terminados em Conf do que nos animais em Psu, respectivamente.

  4. Tranquilização de asininos com acepromazina associada ou não ao diazepam

    Directory of Open Access Journals (Sweden)

    A.L. Araújo

    2014-02-01

    Full Text Available Avaliaram-se os efeitos da acepromazina isolada ou associada ao diazepam em asininos. Cinco asininos foram submetidos a dois protocolos anestésicos: os do grupo acepromazina (AC receberam acepromazina, 0,1mg/kg/IV, e os do grupo acepromazina-diazepam (ACD, acepromazina na mesma dose e via do AC, associada ao diazepam, 0,1mg/kg/IV. Foram mensuradas as frequências cardíaca (FC e respiratória (FR e a temperatura retal (TR e analisadas variáveis eletrocardiográficas, tranquilização, período de latência, início do prolapso peniano e grau de ataxia. A tranquilização iniciou-se aos 10,4±0,9 minutos nos asininos do AC e aos 4,8±1,1 nos do ACD. Ocorreu prolapso peniano aos 4,2±1,3min no AC e aos 2,7±0,4 no ACD. A FC elevou-se aos 15 e 30min no AC. Não ocorreu variação significativa nas variáveis eletrocardiográficas e na temperatura retal. A FR diminuiu no AC a partir de 60min e no ACD a partir de 30min. A distância focinho-solo reduziu-se significativamente em ambos os grupos e nos momentos a partir de 15min. Concluiu-se que a acepromazina promove tranquilização discreta, e a adição do diazepam potencializa a tranquilização, diminui o período de latência e aumenta a ataxia.

  5. Os determinantes da existência e dos poderes das câmaras altas: federalismo ou presidencialismo?

    Directory of Open Access Journals (Sweden)

    Pedro Robson Pereira Neiva

    Full Text Available Dans cet article, on cherche à identifier les déterminants de l'existence et des pouvoirs des Hautes Chambres. Après examen des compétences établies dans la Constitution couvrant tous les pays - même les moins démocratiques - à deux Chambres, on a abouti à des conclusions qu'on ne retrouve pas dans la littérature jusqu'à présent. À l'aide d'un modèle mis en place en deux étapes, incluant dans son calcul la possibilité d'un biais de sélection (modèle Heckman, on a évalué aussi bien les facteurs qui mènent à l'existence d'une Haute Chambre que ceux définissant ses pouvoirs. On a vérifié que le fédéralisme est une variable importante pour l'explication de la différence entre pays à deux ou à une Chambre, mais non pas pour celle de la force politique des Hautes Chambres. La variable qui s'est montrée la plus utile dans ce sens a été le système de gouvernement: si dans le régime parlementaire les Chambres ont peu d'attributions, dans le système présidentiel, au contraire, elles disposent de larges pouvoirs.

  6. Negative Ion Confinement in the Multicusp Ion Source

    Science.gov (United States)

    Khodadadi Azadboni, Fatemeh; Sedaghatizade, Mahmood

    2010-04-01

    To optimize the negative ion source and generate intense beams of negative ions, understanding of transport properties of both electrons and negative ions is indispensable. Transport process of negative hydrogen ions (H-) in a multicusp H- source, has been simulated by three-dimensional Femlab simulation software. Multipolar plasma confinement is known to result in enhanced plasma density, homogeneous plasma of a large volume, and quiescent plasmas. The effect of plasma confinement by applying multi-polar magnetic field was investigated. Results are obtained for ten different configurations of permanent magnet and discussed. Full line cusps are found to give optimum plasma density. Negative ions created on the sidewall hardly can reach the center of the source due to trapping by the multicusp magnetic field. As a result, H- ions created on the sidewall do not have a significant effect on the H- current.

  7. Participação da NADPH oxidase no processo de secreção de insulina em ilhotas pancreáticas isoladas de ratas alimentadas ou em jejum.

    OpenAIRE

    2014-01-01

    Avaliamos importância da NADPH oxidase 2 (NOX2) na produção de espécies reativas de oxigênio (EROs) em ilhotas de ratas alimentadas ou em jejum, incubadas na presença de 2,8 mM ou 16,7 mM de glicose, associada ou não a leucina, com ou sem inibição da NOX2. As ilhotas dos animais alimentados ou em jejum apresentaram reduzida secreção de insulina e altas concentrações de EROs na presença de 2,8 mM de glicose. Esses parâmetros foram invertidos pela adição de inibidores da NOX2. A leucina, que é ...

  8. Ion binding to biological macromolecules.

    Science.gov (United States)

    Petukh, Marharyta; Alexov, Emil

    2014-11-01

    Biological macromolecules carry out their functions in water and in the presence of ions. The ions can bind to the macromolecules either specifically or non-specifically, or can simply to be a part of the water phase providing physiological gradient across various membranes. This review outlines the differences between specific and non-specific ion binding in terms of the function and stability of the corresponding macromolecules. Furthermore, the experimental techniques to identify ion positions and computational methods to predict ion binding are reviewed and their advantages compared. It is indicated that specifically bound ions are relatively easier to be revealed while non-specifically associated ions are difficult to predict. In addition, the binding and the residential time of non-specifically bound ions are very much sensitive to the environmental factors in the cells, specifically to the local pH and ion concentration. Since these characteristics differ among the cellular compartments, the non-specific ion binding must be investigated with respect to the sub-cellular localization of the corresponding macromolecule.

  9. Charge Breeding of Radioactive Ions

    CERN Document Server

    Wenander, F J C

    2013-01-01

    Charge breeding is a technique to increase the charge state of ions, in many cases radioactive ions. The singly charged radioactive ions, produced in an isotope separator on-line facility, and extracted with a low kinetic energy of some tens of keV, are injected into a charge breeder, where the charge state is increased to Q. The transformed ions are either directed towards a dedicated experiment requiring highly charged ions, or post-accelerated to higher beam energies. In this paper the physics processes involved in the production of highly charged ions will be introduced, and the injection and extraction beam parameters of the charge breeder defined. A description of the three main charge-breeding methods is given, namely: electron stripping in gas jet or foil; external ion injection into an electron-beam ion source/trap (EBIS/T); and external ion injection into an electron cyclotron resonance ion source (ECRIS). In addition, some preparatory devices for charge breeding and practical beam delivery aspects ...

  10. Ion Channels in Neurological Disorders.

    Science.gov (United States)

    Kumar, Pravir; Kumar, Dhiraj; Jha, Saurabh Kumar; Jha, Niraj Kumar; Ambasta, Rashmi K

    2016-01-01

    The convergent endeavors of the neuroscientist to establish a link between clinical neurology, genetics, loss of function of an important protein, and channelopathies behind neurological disorders are quite intriguing. Growing evidence reveals the impact of ion channels dysfunctioning in neurodegenerative disorders (NDDs). Many neurological/neuromuscular disorders, viz, Alzheimer's disease, Parkinson's disease, Huntington's disease, multiple sclerosis, amyotrophic lateral sclerosis, and age-related disorders are caused due to altered function or mutation in ion channels. To maintain cell homeostasis, ion channels are playing a crucial role which is a large transmembrane protein. Further, these channels are important as it determines the membrane potential and playing critically in the secretion of neurotransmitter. Behind NDDs, losses of pathological proteins and defective ion channels have been reported and are found to aggravate the disease symptoms. Moreover, ion channel dysfunctions are eliciting a range of symptoms, including memory loss, movement disabilities, neuromuscular sprains, and strokes. Since the possible mechanistic role played by aberrant ion channels, their receptor and associated factors in neurodegeneration remained elusive; therefore, it is a challenging task for the neuroscientist to implement the therapeutics for targeting NDDs. This chapter reviews the potential role of the ion channels in membrane physiology and brain homeostasis, where ion channels and their associated factors have been characterized with their functional consequences in neurological diseases. Moreover, mechanistic role of perturbed ion channels has been identified in various NDDs, and finally, ion channel modulators have been investigated for their therapeutic intervention in treating common NDDs.

  11. Gas and metal ion sources

    Energy Technology Data Exchange (ETDEWEB)

    Oaks, E. [High Current Electronics Institute, Tomsk (Russian Federation)]|[State Academy of Control System and Radioelectronics, Tomsk (Russian Federation); Yushkov, G. [High Current Electronics Institute, Tomsk (Russian Federation)

    1996-08-01

    The positive ion sources are now of interest owing to both their conventional use, e.g., as injectors in charged-particle accelerators and the promising capabilities of intense ion beams in the processes related to the action of ions on various solid surfaces. For industrial use, the sources of intense ion beams and their power supplies should meet the specific requirements as follows: They should be simple, technologically effective, reliable, and relatively low-cost. Since the scanning of an intense ion beam is a complicated problem, broad ion beams hold the greatest promise. For the best use of such beams it is desirable that the ion current density be uniformly distributed over the beam cross section. The ion beam current density should be high enough for the treatment process be accomplished for an acceptable time. Thus, the ion sources used for high-current, high-dose metallurgical implantation should provide for gaining an exposure dose of {approximately} 10{sup 17} cm{sup {minus}2} in some tens of minutes. So the average ion current density at the surface under treatment should be over 10{sup {minus}5} A/cm{sup 2}. The upper limit of the current density depends on the admissible heating of the surface under treatment. The accelerating voltage of an ion source is dictated by its specific use; it seems to lie in the range from {approximately}1 kV (for the ion source used for surface sputtering) to {approximately}100 kV and over (for the ion sources used for high-current, high-dose metallurgical implantation).

  12. Cobalt alloy ion sources for focused ion beam implantation

    Energy Technology Data Exchange (ETDEWEB)

    Muehle, R.; Doebeli, M. [Paul Scherrer Inst. (PSI), Villigen (Switzerland); Zimmermann, P. [Eidgenoessische Technische Hochschule, Zurich (Switzerland)

    1997-09-01

    Cobalt alloy ion sources have been developed for silicide formation by focused ion beam implantation. Four eutectic alloys AuCo, CoGe, CoY and AuCoGe were produced by electron beam welding. The AuCo liquid alloy ion source was investigated in detail. We have measured the emission current stability, the current-voltage characteristics, and the mass spectrum as a function of the mission current. (author) 1 fig., 2 refs.

  13. Ion channels in plants

    Science.gov (United States)

    Baluška, František; Mancuso, Stefano

    2013-01-01

    In his recent opus magnum review paper published in the October issue of Physiology Reviews, Rainer Hedrich summarized the field of plant ion channels.1 He started from the earliest electric recordings initiated by Charles Darwin of carnivorous Dionaea muscipula,1,2 known as Venus flytrap, and covered the topic extensively up to the most recent discoveries on Shaker-type potassium channels, anion channels of SLAC/SLAH families, and ligand-activated channels of glutamate receptor-like type (GLR) and cyclic nucleotide-gated channels (CNGC).1 PMID:23221742

  14. Carbon Ion Therapy

    DEFF Research Database (Denmark)

    Bassler, Niels; Hansen, David Christoffer; Herrmann, Rochus;

    On the importance of choice of target size for selective boosting of hypoxic tumor subvolumina in carbon ion therapy Purpose: Functional imaging methods in radiotherapy are maturing and can to some extent uncover radio resistant structures found within a tumour entity. Selective boost of identified...... size and PTV position. Methods: Several treatment plans are produced with TRiP, using a 256x256x256 mm3 water phantom and SOBP optimization on physical dose. Box formed PTV volumes between 0.15 - 1010 cm3, and PTV positions ranging from 3 cm to 200 cm depth (relative...

  15. Surface Production of Ions

    Science.gov (United States)

    1992-05-26

    Hill, New York 1938) p. 60-64. 21. S. Dushman, Scientific Foundations of Vacuum Technique, Second Edition (John Wiley & Sons, New York, 1962) p. 91...hydrogen atom (or H + ion) from a metal surface is of funda- Liouville equation, whose solution involves the coupling ma- ’ Jonh . mental interest both from a...Appi. Phys. 50 (4), April 1979 IsB Chapman Glow Discharge Processes John Wiley and Sons New York, 1980 pp 114-115. -H. L. Cui, J. Vac. Sci. Tech. A 9

  16. A novel planar ion funnel design for miniature ion optics

    Science.gov (United States)

    Chaudhary, A.; van Amerom, Friso H. W.; Short, R. T.

    2014-10-01

    The novel planar ion funnel (PIF) design presented in this article emphasizes simple fabrication, assembly, and operation, making it amenable to extreme miniaturization. Simulations performed in SIMION 8.0 indicate that ion focusing can be achieved by using a gradient of electrostatic potentials on concentric metal rings in a plane. A prototype was fabricated on a 35 × 35 mm custom-designed printed circuit board (PCB) with a center hole for ions to pass through and a series of concentric circular metal rings of increasing diameter on the front side of the PCB. Metal vias on the PCB electrically connected each metal ring to a resistive potential divider that was soldered on the back of the PCB. The PIF was tested at 5.5 × 10-6 Torr in a vacuum test setup that was equipped with a broad-beam ion source on the front and a micro channel plate (MCP) ion detector on the back of the PIF. The ion current recorded on the MCP anode during testing indicated a 23× increase in the ion transmission through the PIF when electric potentials were applied to the rings. These preliminary results demonstrate the functionality of a 2D ion funnel design with a much smaller footprint and simpler driving electronics than conventional 3D ion funnels. Future directions to improve the design and a possible micromachining approach to fabrication are discussed in the conclusions.

  17. Electron beam ion source and electron beam ion trap (invited).

    Science.gov (United States)

    Becker, Reinard; Kester, Oliver

    2010-02-01

    The electron beam ion source (EBIS) and its trap variant [electron beam ion trap (EBIT)] celebrated their 40th and 20th anniversary, respectively, at the EBIS/T Symposium 2007 in Heidelberg. These technologically challenging sources of highly charged ions have seen a broad development in many countries over the last decades. In contrast to most other ion sources the recipe of improvement was not "sorcery" but a clear understanding of the physical laws and obeying the technological constraints. This review will report important achievements of the past as well as promising developments in the future.

  18. Electron beam ion source and electron beam ion trap (invited)

    Energy Technology Data Exchange (ETDEWEB)

    Becker, Reinard [Scientific Software Service, Kapellenweg 2a, D-63571 Gelnhausen (Germany); Kester, Oliver [National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)

    2010-02-15

    The electron beam ion source (EBIS) and its trap variant [electron beam ion trap (EBIT)] celebrated their 40th and 20th anniversary, respectively, at the EBIS/T Symposium 2007 in Heidelberg. These technologically challenging sources of highly charged ions have seen a broad development in many countries over the last decades. In contrast to most other ion sources the recipe of improvement was not ''sorcery'' but a clear understanding of the physical laws and obeying the technological constraints. This review will report important achievements of the past as well as promising developments in the future.

  19. Enhanced secondary ion emission with a bismuth cluster ion source

    Science.gov (United States)

    Nagy, G.; Walker, A. V.

    2007-04-01

    We have investigated the mechanism of secondary ion yield enhancement using Bin+ (n = 1-6) primary ions and three different samples - dl-phenylalanine, Irganox 1010 and polystyrene - adsorbed on Al, Si and Ag substrates. The largest changes in secondary ion yields are observed for Bi2+ and Bi3+ primary ions. Smaller increases in secondary ion yield are found using Bi4+, Bi5+ and Bi6+ projectiles. The secondary ion yield enhancements are generally larger on Si than on Al. Using Bin+ structures obtained from density functional theory (DFT) calculations we demonstrate that the yield enhancements cannot be explained by an increase in the deposited energy density (energy per area) into the substrate. These data show that the mechanism of Bin+ sputtering is very similar to that for Aun+ primary ion beams. When a polyatomic primary ion strikes the substrate, its constituent atoms are likely to remain near to each other, and so a substrate atom can be struck simultaneously by multiple atoms. The action of these multiple concerted impacts leads to efficient energy transfer in the near surface region and an increase in the number of secondary ions ejected from the surface. Such concerted impacts involve one, two or three projectile atoms, which explains well the nonlinear yield enhancements observed going from Bi+ to Bi2+ to Bi3+.

  20. Autogestion des troubles de l'humeur et/ou d'anxiété par l'activité physique et l'exercice

    Directory of Open Access Journals (Sweden)

    Louise Pelletier

    2017-01-01

    Full Text Available Introduction : L'activité physique et l'exercice constituent une stratégie d'autogestion importante pour les personnes vivant avec une maladie mentale. Cette étude visait à caractériser à la fois les personnes atteintes d'un trouble de l'humeur et/ou d'anxiété qui faisaient de l'exercice ou de l'activité physique pour aider à gérer leur trouble et celles qui n'en faisaient pas, ainsi qu'à identifier les facteurs facilitant l'activité physique et l'exercice et ceux constituant un obstacle. Méthodologie : L'Enquête sur les personnes ayant une maladie chronique au Canada - Composante des troubles de l'humeur et/ou d'anxiété de 2014 a été utilisée pour cette étude. Les répondants (n = 2 678 ont été classés en fonction de la fréquence à laquelle ils faisaient de l'exercice : (1 aucun exercice, (2 exercice une à trois fois par semaine et (3 exercice quatre fois ou plus par semaine. Nous avons procédé à des analyses descriptives et de régression logistique multinomiale. Nous avons pondéré toutes les estimations afin que les données soient représentatives de la population canadienne adulte vivant en logement privé dans l'une des 10 provinces et ayant déclaré avoir reçu un diagnostic de troubles de l'humeur et/ou d'anxiété. Résultats : Sur l'ensemble des Canadiens affectés, 51,0 % ne faisaient aucun exercice pour aider à gérer leur trouble de l'humeur et/ou d'anxiété, 23,8 % en faisaient d'une à trois fois par semaine et 25,3 % en faisaient quatre fois ou plus par semaine. On a établi un lien entre, d'une part, un âge plus avancé, des niveaux de scolarité plus bas et une suffisance de revenu du ménage plus faible et, d'autre part, une fréquence plus importante de l'inactivité. Les individus vivant avec un trouble de l'humeur (avec ou sans anxiété et ceux avec des comorbidités physiques étaient moins susceptibles de faire régulièrement de l'exercice. Les recommandations d'un médecin ou d

  1. Practical aspects of trapped ion mass spectrometry, 5 applications of ion trapping devices

    CERN Document Server

    March, Raymond E

    2009-01-01

    Examines ion/neutral and ion/ion reactions, ion spectroscopy, and the structural characterization of proteins and peptides using quadropole ion trap mass spectrometry, Fourier transform - ion cyclotron resonance (FT-ICR) mass spectrometry, and traveling wave ion mobility mass spectrometry.

  2. Proton and carbon ion therapy

    CERN Document Server

    Lomax, Tony

    2013-01-01

    Proton and Carbon Ion Therapy is an up-to-date guide to using proton and carbon ion therapy in modern cancer treatment. The book covers the physics and radiobiology basics of proton and ion beams, dosimetry methods and radiation measurements, and treatment delivery systems. It gives practical guidance on patient setup, target localization, and treatment planning for clinical proton and carbon ion therapy. The text also offers detailed reports on the treatment of pediatric cancers, lymphomas, and various other cancers. After an overview, the book focuses on the fundamental aspects of proton and carbon ion therapy equipment, including accelerators, gantries, and delivery systems. It then discusses dosimetry, biology, imaging, and treatment planning basics and provides clinical guidelines on the use of proton and carbon ion therapy for the treatment of specific cancers. Suitable for anyone involved with medical physics and radiation therapy, this book offers a balanced and critical assessment of state-of-the-art...

  3. Negative hydrogen ion production mechanisms

    Energy Technology Data Exchange (ETDEWEB)

    Bacal, M. [UPMC, LPP, Ecole Polytechnique, UMR CNRS 7648, Palaiseau (France); Wada, M. [School of Science and Engineering, Doshisha University, Kyoto 610-0321 (Japan)

    2015-06-15

    Negative hydrogen/deuterium ions can be formed by processes occurring in the plasma volume and on surfaces facing the plasma. The principal mechanisms leading to the formation of these negative ions are dissociative electron attachment to ro-vibrationally excited hydrogen/deuterium molecules when the reaction takes place in the plasma volume, and the direct electron transfer from the low work function metal surface to the hydrogen/deuterium atoms when formation occurs on the surface. The existing theoretical models and reported experimental results on these two mechanisms are summarized. Performance of the negative hydrogen/deuterium ion sources that emerged from studies of these mechanisms is reviewed. Contemporary negative ion sources do not have negative ion production electrodes of original surface type sources but are operated with caesium with their structures nearly identical to volume production type sources. Reasons for enhanced negative ion current due to caesium addition to these sources are discussed.

  4. Negative hydrogen ion production mechanisms

    Science.gov (United States)

    Bacal, M.; Wada, M.

    2015-06-01

    Negative hydrogen/deuterium ions can be formed by processes occurring in the plasma volume and on surfaces facing the plasma. The principal mechanisms leading to the formation of these negative ions are dissociative electron attachment to ro-vibrationally excited hydrogen/deuterium molecules when the reaction takes place in the plasma volume, and the direct electron transfer from the low work function metal surface to the hydrogen/deuterium atoms when formation occurs on the surface. The existing theoretical models and reported experimental results on these two mechanisms are summarized. Performance of the negative hydrogen/deuterium ion sources that emerged from studies of these mechanisms is reviewed. Contemporary negative ion sources do not have negative ion production electrodes of original surface type sources but are operated with caesium with their structures nearly identical to volume production type sources. Reasons for enhanced negative ion current due to caesium addition to these sources are discussed.

  5. Rectangular ion funnel: a new ion funnel interface for structures for lossless ion manipulations.

    Science.gov (United States)

    Chen, Tsung-Chi; Webb, Ian K; Prost, Spencer A; Harrer, Marques B; Norheim, Randolph V; Tang, Keqi; Ibrahim, Yehia M; Smith, Richard D

    2015-01-06

    Structures for lossless ion manipulations (SLIM) have recently demonstrated the ability for near lossless ion focusing, transfer, and trapping in subatmospheric pressure regions. While lossless ion manipulations are advantageously applied to the applications of ion mobility separations and gas phase reactions, ion introduction through ring electrode ion funnels or more conventional ion optics to SLIM can involve discontinuities in electric fields or other perturbations that result in ion losses. In this work, we developed and investigated a new funnel design that aims to seamlessly couple to SLIM at the funnel exit. This rectangular ion funnel (RIF) was initially evaluated by ion simulations, fabricated utilizing printed circuit board technology, and tested experimentally. The RIF was integrated to a SLIM-time of flight (TOF) MS system, and the operating parameters, including RF, DC bias of the RIF electrodes, and electric fields for effectively interfacing with a SLIM, were characterized. The RIF provided a 2-fold sensitivity increase without significant discrimination over a wide m/z range and well matched to that of SLIM, along with greatly improved SLIM operational stability.

  6. Perversão nas mulheres ou perversão feminina. Uma questão de sexuação

    Directory of Open Access Journals (Sweden)

    Patrick Martin-Mattera

    2014-09-01

    Full Text Available A questão do sexo da perversão resulta de uma problemática necessariamente social. Perversão polimorfa, perversão patológica, perversão estrutural, são as três modalidades de abordagem que nos interessam aqui para cruzar as noções de sexuação e de perversão. A perversão tem um gênero, isto é, pertence especificamente a um estilo masculino ou feminino ou existe por um lado uma perversão masculina e, por outro, uma perversão feminina?

  7. Cartography of flood hazard by overflowing rivers using hydraulic modeling and geographic information system: Oued El Harrach case (North of Algeria

    Directory of Open Access Journals (Sweden)

    S. W. Astite

    2015-12-01

    Full Text Available The aim of the present study is the management of flood risk through the use of cartography of flood hazards by overflowing rivers. This cartography is developed using modern simulation tools namely the hydraulic model (HECRAS as well as the Geographic Information System (ArcGis. The study concerns Oued El Harrach (North of Algeria surrounding area which has been subject to several floods causing significant human and material damage. This loss is a consequence of the use flood zones as habitats for people. This can be avoided in the future by use the mapping of the spatial extent of the flood hazard on the land of the Oued El Harrach. Hence the importance of the cartography developed in this study as an essential tool for decision makers in prevention, protection and management of flood risks.

  8. DETERMINATION DE QUELQUES PARAMETRES BIOCHIMIQUES CHEZ LES FEMMES ENCEINTES OBESES AVEC OU SANS COMPLICATIONS ET CHEZ LEURS NOUVEAU-NES DANS LA REGION DE TLEMCEN

    OpenAIRE

    BENMAHIEDDINE, Assia

    2014-01-01

    Le but de ce travail consiste à mettre en évidence les altérations métaboliques liées à l’obésité en absence ou en présence de complications au cours de la grossesse, par l’analyse des paramètres biochimiques (glucose, cholestérol, triglycérides, urée, créatinines, protéines totales, albumines, calcium, phosphore, transaminases TGO-TGP). Nos résultats montrent que l’obésité seule ou associée à l’une de ses complications (diabète et hypertension) au cours de la grossesse entraîn...

  9. Le kinoskaz ou « dit » cinématographique : quelques principes théoriques pour un genre nouveau

    OpenAIRE

    Géry, Catherine de

    2016-01-01

    L’hypothèse d'un « skaz cinématographique » se fonde sur l’étude des stratégies de transposition des procédés du skaz (conte oral ou « dit ») dans le cinéma soviétique muet des années 1920. L’objectif est de montrer, dans le prolongement des travaux des formalistes russes sur la différenciation des langages littéraire et cinématographique, comment un « tout gestuel » vient se substituer à un « tout oral » à l'intérieur d'un autre système de perception, ou comment le langage cinétique du burle...

  10. DÉTERMINANT ZÉRO OU OMISSION DU DÉTERMINANT EN FRANÇAIS DE COTE D'IVOIRE

    OpenAIRE

    Boutin, Akissi,

    2007-01-01

    International audience; Les faits linguistiques présentés ici sont regroupés pour leur similitude morphologique et syntaxique : ce sont des syntagmes nominaux sans déterminant ; c’est pourtant une question sémantique qui nous intéresse : leur valeur, référentielle ou générique.Une étude de l’absence de déterminant et du déterminant zéro, en français de Côte d’Ivoire, ne peut être menée en se fondant uniquement sur un corpus de séquences relevées dans la presse ou dans des écrits littéraires. ...

  11. Electrically switched ion exchange

    Energy Technology Data Exchange (ETDEWEB)

    Lilga, M.A. [Pacific Northwest National Lab., Richland, WA (United States); Schwartz, D.T.; Genders, D.

    1997-10-01

    A variety of waste types containing radioactive {sup 137}Cs are found throughout the DOE complex. These waste types include water in reactor cooling basins, radioactive high-level waste (HLW) in underground storage tanks, and groundwater. Safety and regulatory requirements and economics require the removal of radiocesium before these wastes can be permanently disposed of. Electrically Switched Ion Exchange (ESIX) is an approach for radioactive cesium separation that combines IX and electrochemistry to provide a selective, reversible, and economic separation method that also produces little or no secondary waste. In the ESIX process, an electroactive IX film is deposited electrochemically onto a high-surface area electrode, and ion uptake and elution are controlled directly by modulating the potential of the film. For cesium, the electroactive films under investigation are ferrocyanides, which are well known to have high selectivities for cesium in concentrated sodium solutions. When a cathode potential is applied to the film, Fe{sup +3} is reduced to the Fe{sup +2} state, and a cation must be intercalated into the film to maintain charge neutrality (i.e., Cs{sup +} is loaded). Conversely, if an anodic potential is applied, a cation must be released from the film (i.e., Cs{sup +} is unloaded). Therefore, to load the film with cesium, the film is simply reduced; to unload cesium, the film is oxidized.

  12. Ion-atom hybrid systems

    CERN Document Server

    Willitsch, Stefan

    2014-01-01

    The study of interactions between simultaneously trapped cold ions and atoms has emerged as a new research direction in recent years. The development of ion-atom hybrid experiments has paved the way for investigating elastic, inelastic and reactive collisions between these species at very low temperatures, for exploring new cooling mechanisms of ions by atoms and for implementing new hybrid quantum systems. The present lecture reviews experimental methods, recent results and upcoming developments in this emerging field.

  13. Bucharest heavy ion accelerator facility

    Energy Technology Data Exchange (ETDEWEB)

    Ceausescu, V.; Dobrescu, S.; Duma, M.; Indreas, G.; Ivascu, M.; Papureanu, S.; Pascovici, G.; Semenescu, G.

    1986-02-15

    The heavy ion accelerator facility of the Heavy Ion Physics Department at the Institute of Physics and Nuclear Engineering in Bucharest is described. The Tandem accelerator development and the operation of the first stage of the heavy ion postaccelerating system are discussed. Details are given concerning the resonance cavities, the pulsing system matching the dc beam to the RF cavities and the computer control system.

  14. Instrumentation pour la spectroscopie laser sur faisceau d'ions rapides

    Science.gov (United States)

    Bazin, Marc

    Devant l'emergence des technologies exploitant l'infiniment petit, la spectroscopie atomique et moleculaire devient de plus en plus incontournable pour comprendre precisement les mecanismes quantiques impliques dans l'interaction des molecules. C'est le cas notamment de la nanotechnologie, de la dynamique reactionnelle des gaz a effet de serre ou simplement de l'identification des molecules constituant certains objets de l'astrophysique. Bien qu'un travail considerable soit deja accompli pour comprendre la dissociation ou la formation des molecules simples, il reste a vaincre la complexite des mecanismes impliques lorsque les molecules possedent plus de trois noyaux. Parmi les rares techniques de spectroscopie a tres haute resolution (jusqu'a la structure hyperfine), la spectroscopie laser sur faisceaux d'ions rapides est une methode experimentale eprouvee depuis trois decennies environ. Cette methode spectroscopique fournit des resultats comptant parmi les meilleurs pour obtenir des constantes moleculaires precises et permettre la reduction du spectre moleculaire. Une particularite remarquable de notre instrument est la possibilite d'enregistrer le signal de fragmentation moleculaire par laser via les etats de predissociation de la molecule etudiee. Notre contribution a ete d'ameliorer et de moderniser l'equipement existant. Nous avons augmente la resolution spectrale de notre instrument. Nous avons atteint notre principal objectif, a savoir, la possibilite d'acquerir des spectres selon deux modes : par detection du signal synchronisee sur le faisceau laser module en frequence ou par detection du signal directement par comptage. Cette derniere methode est une premiere sur ce type d'instrument et son principal interet a ete d'obtenir une meilleure mesure de l'elargissement de raie. Nous sommes parvenus a mettre clairement en evidence l'elargissement de raie avec la puissance laser en utilisant la methode de detection par comptage direct. La fluorescence induite par

  15. Highly Stripped Ion Sources for MeV Ion Implantation

    Energy Technology Data Exchange (ETDEWEB)

    Hershcovitch, Ady

    2009-06-30

    Original technical objectives of CRADA number PVI C-03-09 between BNL and Poole Ventura, Inc. (PVI) were to develop an intense, high charge state, ion source for MeV ion implanters. Present day high-energy ion implanters utilize low charge state (usually single charge) ion sources in combination with rf accelerators. Usually, a MV LINAC is used for acceleration of a few rnA. It is desirable to have instead an intense, high charge state ion source on a relatively low energy platform (de acceleration) to generate high-energy ion beams for implantation. This de acceleration of ions will be far more efficient (in energy utilization). The resultant implanter will be smaller in size. It will generate higher quality ion beams (with lower emittance) for fabrication of superior semiconductor products. In addition to energy and cost savings, the implanter will operate at a lower level of health risks associated with ion implantation. An additional aim of the project was to producing a product that can lead to long­ term job creation in Russia and/or in the US. R&D was conducted in two Russian Centers (one in Tomsk and Seversk, the other in Moscow) under the guidance ofPVI personnel and the BNL PI. Multiple approaches were pursued, developed, and tested at various locations with the best candidate for commercialization delivered and tested at on an implanter at the PVI client Axcelis. Technical developments were exciting: record output currents of high charge state phosphorus and antimony were achieved; a Calutron-Bemas ion source with a 70% output of boron ion current (compared to 25% in present state-of-the-art). Record steady state output currents of higher charge state phosphorous and antimony and P ions: P{sup 2+} (8.6 pmA), P{sup 3+} (1.9 pmA), and P{sup 4+} (0.12 pmA) and 16.2, 7.6, 3.3, and 2.2 pmA of Sb{sup 3+} Sb {sup 4 +}, Sb{sup 5+}, and Sb{sup 6+} respectively. Ultimate commercialization goals did not succeed (even though a number of the products like high

  16. Experimental investigation of ion-ion recombination at atmospheric conditions

    Directory of Open Access Journals (Sweden)

    A. Franchin

    2015-02-01

    Full Text Available We present the results of laboratory measurements of the ion-ion recombination coefficient at different temperatures, relative humidities and concentrations of ozone and sulfur dioxide. The experiments were carried out using the Cosmics Leaving OUtdoor Droplets (CLOUD chamber at CERN, the walls of which are made of conductive material, making it possible to measure small ions. We produced ions in the chamber using a 3.5 GeV c−1 beam of positively-charged pions (π+ from the CERN Proton Synchrotron (PS and with galactic cosmic rays, when the PS was switched off. The range of the ion production rate varied from 2 to 100 cm−3s−1, covering the typical range of ionization throughout the troposphere. The temperature ranged from −55 to 20 °C, the relative humidity from 0 to 70%, the SO2 concentration from 0 to 40 ppb, and the ozone concentration from 200 to 700 ppb. At 20 °C and 40% RH, the retrieved ion-ion recombination coefficient was (2.3 ± 0.7 × 10−6cm3s−1. We observed no dependency of the ion-ion recombination coefficient on ozone concentration and a weak variation with sulfur dioxide concentration. However, we found a strong dependency of the ion-ion recombination coefficient on temperature. We compared our results with three different models and found an overall agreement for temperatures above 0 °C, but a disagreement at lower temperatures. We observed a strong dependency of the recombination coefficient on relative humidity, which has not been reported previously.

  17. L'espace perspectif au théâtre: espace «idéaliste» ou «réaliste»?

    Directory of Open Access Journals (Sweden)

    Marc BAYARD

    1998-12-01

    Full Text Available L'utilisation des différentes techniques de la perspective dans le théâtre à la fin du xvie siècle et au début du xviie siècle a pour enjeu d'intégrer ou d'exclure l'homme dans la géographie illusionniste de la scène. Le cas de l'Italie et de la France.

  18. L'espace perspectif au théâtre: espace «idéaliste» ou «réaliste»?

    OpenAIRE

    Marc BAYARD

    1998-01-01

    L'utilisation des différentes techniques de la perspective dans le théâtre à la fin du xvie siècle et au début du xviie siècle a pour enjeu d'intégrer ou d'exclure l'homme dans la géographie illusionniste de la scène. Le cas de l'Italie et de la France.

  19. Three new species of Kerria (Hemiptera: Sternorrhyncha: Coccoidea: Tachardiidae), a redesciption of K. yunnanensis Ou & Hong, and a revised key to species of Kerria.

    Science.gov (United States)

    Ahmad, Ayashaa; Sharma, K K; Ramamurthy, V V; Vidyarthi, A S; Ramani, R

    2013-01-01

    Three new species of lac insect, Kerria Targioni-Tozzetti viz., Kerria manipurensis Ahmad & Ramamurthy sp. nov., Kerria maduraiensis Ahmad & Ramamurthy sp. nov., and Kerria thrissurensis Ahmad & Ramamurthy sp. nov. are described and illustrated. Kerria yunnanensis Ou & Hong is illustrated and redescribed, and a key to the known species of Kerria is provided. The usefulness of star pores as a diagnostic character in the subgeneric divisions of Kerria is also discussed.

  20. Pattern formation with trapped ions

    CERN Document Server

    Lee, Tony E

    2010-01-01

    We propose an experiment to study collective behavior in a nonlinear medium of trapped ions. Using laser cooling and heating and an anharmonic trap potential, one can turn an ion into a nonlinear van der Pol-Duffing oscillator. A chain of ions interacting electrostatically has stable plane waves for all parameters. The system also behaves like an excitable medium, since a sufficiently large perturbation generates a travelling pulse. Small chains exhibit multistability and limit cycles. We account for noise from spontaneous emission in the amplitude equation and find that the patterns are observable for realistic experimental parameters. The tunability of ion traps makes them an exciting setting to study nonequilibrium statistical physics.