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Sample records for le reacteur phenix

  1. Phenix reactor: a review of 35 year long operating life; Le reacteur Phenix: bilan de 35 ans de fonctionnement

    Energy Technology Data Exchange (ETDEWEB)

    Martin, L.; Dall' Ava, D.; Rochwerger, D.; Goux, D. [CEA Marcoule 30 (France); Guidez, J.; Martin, Ph.; Seran, J.L. [CEA Saclay 91 - Gif sur Yvette (France); Sauvage, J.F.; Prele, G.; Guihard, J. [Electricite de France (EDF), 75 - Paris (France); Bernardin, B.; Vanier, M.; Zaetta, A.; Latge, Ch. [CEA Cadarache, 13 - Saint Paul lez Durance (France); Fontaine, B.; Jolly, J.A.; Gros, J.; Pepe, D. [CEA Marcoule, Centrale Phenix, 30 (France); Pelletier, M.; Pillon, S. [CEA Cadarache, Dept. d' Etudes des Combustibles, 13 - Saint Paul lez Durance (France); Escaravage, C.; Gelineau, O.; Dupraz, R.; Dirat, J.F.; Giraud, M. [AREVA NP, 92 - Paris la Defense (France); Michaille, P. [CEA Dam, DP2I, Mar (France)

    2009-01-15

    Phenix reactor that was commissioned in 1973, had its final shutdown during the beginning of 2009. This series of articles presents the main contributions of Phenix over its 35 years of operating life in material sciences, the handling of sodium, the design of fast reactors, core physics and reactor safety. Other articles recall the feedback experience on particular components like sodium pumps, steam generators or intermediate heat exchangers and about reactor maintenance. This power plant was first an experimental reactor that, with its hot cells, has performed important irradiation programs concerning mainly fast reactor technology and transmutation as a tool for burning actinides. One article reviews the environmental impact of this reactor over its operating life in terms of waste production and dosimetry. (A.C.)

  2. Phenix, a unique research reactor in Europe; Phenix, un reacteur de recherche unique en europe

    Energy Technology Data Exchange (ETDEWEB)

    Guidez, J.; Goux, D. [CEA Valrho, Dir. de l' Energie Nucleaire (DEN), 30 - Marcoule (France); Dupraz, R. [AREVA Framatome ANP, 92 - Paris La Defense (France)

    2005-07-01

    The Phenix reactor located at Marcoule (France) went critical in 1973 for the first time. Between 1974 and 1990 it contributed to the demonstration of the feasibility of an industrial fast reactor, this demonstration was based on the following conclusions: -) an adequate handling of the sodium coolant, -) a low staff dosimetry, -) very few clad failures, -) a breeding ratio of 1.16 while 1.13 was expected, and -) a correct behaviour of the fuel assemblies. In 1990, 2 new experimental programs were launched: Capra for assessing the role of fast reactors in the management of plutonium stocks and Spin for the investigation of the transmutation of minor actinides and long life fission products. An important upgrading took place between 1993 and 2003, Phenix was then allowed to operate for 6 cycles more. The last experiments performed in Phenix are dedicated to the study of actinide transmutation (within the framework of the axis 1 of the Bataille's law) and the investigation of new nuclear fuels and materials for advanced reactors. (A.C.)

  3. The fast breeder reactor Rapsodie (1962); Le reacteur rapide surregenerateur rapsodie (1962)

    Energy Technology Data Exchange (ETDEWEB)

    Vautrey, L.; Zaleski, C.P. [Commissariat a l' Energie Atomique, Cadarache (France). Centre d' Etudes Nucleaires

    1962-07-01

    In this report, the authors describe the Rapsodie project, the French fast breeder reactor, as it stands at construction actual start-up. The paper provides informations about: the principal neutronic and thermal characteristics, the reactor and its cooling circuits, the main handling devices of radioactive or contaminated assemblies, the principles and means governing reactor operation, the purposes and locations of miscellaneous buildings. Rapsodie is expected to be critical by 1964. (authors) [French] Dans ce rapport, les auteurs font le point du projet RAPSODIE (reacteur francais surregenerateur a neutrons rapides), au moment du debut effectif de sa construction. On y trouvera decrits: les principales caracteristiques neutroniques et thermiques, le bloc pile et les circuits de refroidissement, les principaux moyens de manutention des ensembles actifs ou contamines, les principes et les moyens qui regissent la conduite du reacteur, les fonctions et l'implantation des divers batiments. La divergence de RAPSODIE est prevue pour 1964. (auteurs)

  4. Fuel and target programs for the transmutation at Phenix and other reactors; Programmes combustibles et cibles pour la transmutation dans Phenix et autres reacteurs

    Energy Technology Data Exchange (ETDEWEB)

    Gaillard-Groleas, G

    2002-07-01

    The fuels and targets program for transmutation, performed in the framework of the axis 1 of the December 1991 law about the researches on the management of long-lived radioactive wastes, is in perfect consistency with the transmutation scenario studies carried out in the same framework. These studies put forward the advantage of fast breeder reactors (FBR) in the incineration of minor actinides and long-lived fission products. The program includes exploratory and technological demonstration studies covering the different design options. It aims at enhancing our knowledge of the behaviour of materials under irradiation and at ensuring the mastery of processes. The goals of the different experiments foreseen at Phenix reactor are presented. The main goal is to supply a set of results allowing to precise the conditions of the technical feasibility of minor actinides and long-lived fission products incineration in FBRs. (J.S.)

  5. Handbook for the calculation of reactor protections; Formulaire sur le calcul de la protection des reacteurs

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1963-07-01

    This note constitutes the first edition of a Handbook for the calculation of reactor protections. This handbook makes it possible to calculate simply the different neutron and gamma fluxes and consequently, to fix the minimum quantities of materials necessary under general safety conditions both for the personnel and for the installations. It contains a certain amount of nuclear data, calculation methods, and constants corresponding to the present state of our knowledge. (authors) [French] Cette note constitue la premiere edition du 'Formulaire sur le calcul de la protection des reacteurs'. Ce formulaire permet de calculer de facon simple les difterents flux de neutrons et de gamma et, par suite, de fixer les quantites minima de materiaux a utiliser pour que les conditions generales de securite soient respectees, tant pour le personnel que pour les installations. Il contient un certain nombre de donnees nucleaires, de methodes de calcul et de constantes correspondant a l'etat actuel de nos connaissances. (auteurs)

  6. Control rod calibration methods for fast breeder reactors applied to Phenix; Les methodes d'etalonnage des barres de commande des reacteurs a neutrons rapides application a Phenix

    Energy Technology Data Exchange (ETDEWEB)

    Lecourt, G

    1998-06-18

    The control and the emergency shutdown of a fast breeder reactor depends essentially on control rods. For this reason, it is imperative to know exactly how much anti reactivity is introduced with the rods in the reactor core. Different methods have been compared in order to see if they are compatible with Phenix reactor. Their limits have been studied. The shadow and anti shadow effects that can the rods make one to the other and then their effective weight of the rods screen have been clarified. (N.C.)

  7. High energy resolution and high count rate gamma spectrometry measurement of primary coolant of generation 4 sodium-cooled fast reactor; Spectrometrie gamma haute resolution et hauts taux de comptage sur primaire de reacteur de type generation 4 au sodium liquide

    Energy Technology Data Exchange (ETDEWEB)

    Coulon, R.

    2010-11-10

    Sodium-cooled Fast Reactors are under development for the fourth generation of nuclear reactor. Breeders reactors could gives solutions for the need of energy and the preservation of uranium resources. An other purpose is the radioactive wastes production reduction by transmutation and the control of non-proliferation using a closed-cycle. These thesis shows safety and profit advantages that could be obtained by a new generation of gamma spectrometry system for SFR. Now, the high count rate abilities, allow us to study new methods of accurate power measurement and fast clad failure detection. Simulations have been done and an experimental test has been performed at the French Phenix SFR of the CEA Marcoule showing promising results for these new measurements. (author) [French] Les reacteurs a neutrons rapides refroidis au sodium sont en developpement en vue d'assurer une quatrieme generation de reacteurs repondant a la demande energetique, tout en assurant la preservation des ressources d'uranium par un fonctionnement en surgenerateur. L'objectif de la filiere est egalement d'ameliorer la gestion de la radiotoxicite des dechets produits par transmutation des actinides mineurs et de controler la non-proliferation par un fonctionnement en cycle ferme. Une instrumentation de surveillance et de controle de ce type de reacteur a ete etudiee dans cette these. La spectrometrie gamma de nouvelle generation permet, par les hauts taux de traitement aujourd'hui accessibles, d'envisager de nouvelles approches pour suivre avec une precision accrue la puissance neutronique et de detecter plus precocement des ruptures de gaine combustible. Des simulations numeriques ont ete realisees et une campagne d'essai a ete menee a bien sur le reacteur Phenix de Marcoule. Des perspectives prometteuses ont ete mises en exergue pour ces deux problematiques

  8. Nuclear reactor (1960); Reacteurs nucleaires (1960)

    Energy Technology Data Exchange (ETDEWEB)

    Maillard, M.L. [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires; Leo, M.B. [Electricite de France (EDF), 75 - Paris (France)

    1960-07-01

    The first French plutonium-making reactors G1, G2 and G3 built at Marcoule research center are linked to a power plant. The G1 electrical output does not offset the energy needed for operating this reactor. On the contrary, reactors G2 and G3 will each generate a net power of 25 to 30 MW, which will go into the EDF grid. This power is relatively small, but the information obtained from operation is great and will be helpful for starting up the power reactor EDF1, EDF2 and EDF3. The paper describes how, previous to any starting-up operation, the tests performed, especially those concerned with the power plant and the pressure vessel, have helped to bring the commissioning date closer. (author) [French] Les premiers reacteurs industriels plutonigenes francais G1 - G2 - G3 du Centre de Marcoule comportent une installation de recuperation d'energie. La production d'electricite de G1 ne compense pas l'energie depensee par ailleurs pour le fonctionnement de l'ensemble, par contre, G2 et G3 doivent fournir chacun une puissance de 25 a 30 MW au reseau national d'Electricite de France. Cette puissance est modeste, mais l'experience acquise grace a ces reacteurs est tres grande et c'est grace a elle qu'il nous sera possible de mettre en exploitation les reacteurs energetiques EDF1 - EDF2 - EDF3. Le memoire decrit comment, avant tout demarrage du reacteur, les essais effectues, en particulier ceux concernant l'installation de recuperation d'energie et le caisson, ont permis d'abreger la phase de montee en puissance. (auteur)

  9. Introduction to Phenix

    Energy Technology Data Exchange (ETDEWEB)

    Terwilliger, Thomas C. [Los Alamos National Laboratory

    2012-06-04

    PHENIX is a software package that automates nearly all aspects of macromolecular structure determination. This talk will describe the main features of PHENIX, including automated structure solution by MIR, MAD and SAD methods, refinement, molecular replacement, and validation. The PHENIX GUI and command line interfaces will be described as well.

  10. PHENIX Collaboration

    Science.gov (United States)

    Adare, A.; Afanasiev, S.; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Akimoto, R.; Al-Bataineh, H.; Al-Ta'ani, H.; Alexander, J.; Alfred, M.; Andrews, K. R.; Angerami, A.; Aoki, K.; Apadula, N.; Aphecetche, L.; Appelt, E.; Aramaki, Y.; Armendariz, R.; Aronson, S. H.; Asai, J.; Asano, H.; Aschenauer, E. C.; Atomssa, E. T.; Averbeck, R.; Awes, T. C.; Azmoun, B.; Babintsev, V.; Bai, M.; Bai, X.; Baksay, G.; Baksay, L.; Baldisseri, A.; Bandara, N. S.; Bannier, B.; Barish, K. N.; Barnes, P. D.; Bassalleck, B.; Basye, A. T.; Bathe, S.; Batsouli, S.; Baublis, V.; Baumann, C.; Baumgart, S.; Bazilevsky, A.; Beaumier, M.; Beckman, S.; Belikov, S.; Belmont, R.; Ben-Benjamin, J.; Bennett, R.; Berdnikov, A.; Berdnikov, Y.; Bhom, J. H.; Bickley, A. A.; Bing, X.; Black, D.; Blau, D. S.; Boissevain, J. G.; Bok, J. S.; Borel, H.; Boyle, K.; Brooks, M. L.; Broxmeyer, D.; Bryslawskyj, J.; Buesching, H.; Bumazhnov, V.; Bunce, G.; Butsyk, S.; Camacho, C. M.; Campbell, S.; Caringi, A.; Castera, P.; Chang, B. S.; Chang, W. C.; Charvet, J.-L.; Chen, C.-H.; Chernichenko, S.; Chi, C. Y.; Chiba, J.; Chiu, M.; Choi, I. J.; Choi, J. B.; Choi, S.; Choudhury, R. K.; Christiansen, P.; Chujo, T.; Chung, P.; Churyn, A.; Chvala, O.; Cianciolo, V.; Citron, Z.; Cleven, C. R.; Cole, B. A.; Comets, M. P.; Conesa del Valle, Z.; Connors, M.; Constantin, P.; Cronin, N.; Crossette, N.; Csanád, M.; Csörgő, T.; Dahms, T.; Dairaku, S.; Danchev, I.; Das, K.; Datta, A.; Daugherity, M. S.; David, G.; Dayananda, M. K.; Deaton, M. B.; DeBlasio, K.; Dehmelt, K.; Delagrange, H.; Denisov, A.; d'Enterria, D.; Deshpande, A.; Desmond, E. J.; Dharmawardane, K. V.; Dietzsch, O.; Ding, L.; Dion, A.; Do, J. H.; Donadelli, M.; Drapier, O.; Drees, A.; Drees, K. A.; Dubey, A. K.; Durham, J. M.; Durum, A.; Dutta, D.; Dzhordzhadze, V.; D'Orazio, L.; Edwards, S.; Efremenko, Y. V.; Egdemir, J.; Ellinghaus, F.; Emam, W. S.; Engelmore, T.; Enokizono, A.; En'yo, H.; Esumi, S.; Eyser, K. O.; Fadem, B.; Feege, N.; Fields, D. E.; Finger, M.; Finger, M.; Fleuret, F.; Fokin, S. L.; Fraenkel, Z.; Frantz, J. E.; Franz, A.; Frawley, A. D.; Fujiwara, K.; Fukao, Y.; Fusayasu, T.; Gadrat, S.; Gainey, K.; Gal, C.; Gallus, P.; Garg, P.; Garishvili, A.; Garishvili, I.; Ge, H.; Giordano, F.; Glenn, A.; Gong, H.; Gong, X.; Gonin, M.; Gosset, J.; Goto, Y.; Granier de Cassagnac, R.; Grau, N.; Greene, S. V.; Grim, G.; Grosse Perdekamp, M.; Gu, Y.; Gunji, T.; Guo, L.; Guragain, H.; Gustafsson, H.-Å.; Hachiya, T.; Hadj Henni, A.; Haegemann, C.; Haggerty, J. S.; Hahn, K. I.; Hamagaki, H.; Hamblen, J.; Han, R.; Han, S. Y.; Hanks, J.; Harada, H.; Harper, C.; Hartouni, E. P.; Haruna, K.; Hasegawa, S.; Hashimoto, K.; Haslum, E.; Hayano, R.; Hayashi, S.; He, X.; Heffner, M.; Hemmick, T. K.; Hester, T.; Hiejima, H.; Hill, J. C.; Hobbs, R.; Hohlmann, M.; Hollis, R. S.; Holzmann, W.; Homma, K.; Hong, B.; Horaguchi, T.; Hori, Y.; Hornback, D.; Hoshino, T.; Huang, J.; Huang, S.; Ichihara, T.; Ichimiya, R.; Ide, J.; Iinuma, H.; Ikeda, Y.; Imai, K.; Imazu, Y.; Imrek, J.; Inaba, M.; Inoue, Y.; Iordanova, A.; Isenhower, D.; Isenhower, L.; Ishihara, M.; Isinhue, A.; Isobe, T.; Issah, M.; Isupov, A.; Ivanischev, D.; Ivanishchev, D.; Iwanaga, Y.; Jacak, B. V.; Javani, M.; Jeon, S. J.; Jezghani, M.; Jia, J.; Jiang, X.; Jin, J.; Jinnouchi, O.; John, D.; Johnson, B. M.; Jones, T.; Joo, E.; Joo, K. S.; Jouan, D.; Jumper, D. S.; Kajihara, F.; Kametani, S.; Kamihara, N.; Kamin, J.; Kanda, S.; Kaneta, M.; Kaneti, S.; Kang, B. H.; Kang, J. H.; Kang, J. S.; Kanou, H.; Kapustinsky, J.; Karatsu, K.; Kasai, M.; Kawall, D.; Kawashima, M.; Kazantsev, A. V.; Kempel, T.; Key, J. A.; Khachatryan, V.; Khandai, P. K.; Khanzadeev, A.; Kihara, K.; Kijima, K. M.; Kikuchi, J.; Kim, A.; Kim, B. I.; Kim, C.; Kim, D. H.; Kim, D. J.; Kim, E.; Kim, E.-J.; Kim, H.-J.; Kim, H. J.; Kim, K.-B.; Kim, M.; Kim, S. H.; Kim, Y.-J.; Kim, Y. K.; Kinney, E.; Kiriluk, K.; Kiss, Á.; Kistenev, E.; Kiyomichi, A.; Klatsky, J.; Klay, J.; Klein-Boesing, C.; Kleinjan, D.; Kline, P.; Koblesky, T.; Kochenda, L.; Kochetkov, V.; Kofarago, M.; Komatsu, Y.; Komkov, B.; Konno, M.; Koster, J.; Kotchetkov, D.; Kotov, D.; Kozlov, A.; Král, A.; Kravitz, A.; Krizek, F.; Kubart, J.; Kunde, G. J.; Kurihara, N.; Kurita, K.; Kurosawa, M.; Kweon, M. J.; Kwon, Y.; Kyle, G. S.; Lacey, R.; Lai, Y. S.; Lajoie, J. G.; Layton, D.; Lebedev, A.; Lee, B.; Lee, D. M.; Lee, G. H.; Lee, J.; Lee, K.; Lee, K. B.; Lee, K. S.; Lee, M. K.; Lee, S. H.; Lee, S. R.; Lee, T.; Leitch, M. J.; Leite, M. A. L.; Leitgab, M.; Leitner, E.; Lenzi, B.; Lewis, B.; Li, X.; Lichtenwalner, P.; Liebing, P.; Lim, S. H.; Linden Levy, L. A.; Liška, T.; Litvinenko, A.; Liu, H.; Liu, M. X.; Love, B.; Luechtenborg, R.; Lynch, D.; Maguire, C. F.; Makdisi, Y. I.; Ma, M.; Malakhov, A.; Malik, M. D.; Manion, A.; Manko, V. I.; Mannel, E.; Mao, Y.

    2014-12-01

    We thank the staff of the Collider-Accelerator and Physics Departments at Brookhaven National Laboratory and the staff of the other PHENIX participating institutions for their vital contributions. We acknowledge support from the Office of Nuclear Physics in the Office of Science of the Department of Energy, the National Science Foundation, a sponsored research grant from Renaissance Technologies LLC, Abilene Christian University Research Council, Research Foundation of SUNY, and Dean of the College of Arts and Sciences, Vanderbilt University (USA), Ministry of Education, Culture, Sports, Science, and Technology and the Japan Society for the Promotion of Science (Japan), Conselho Nacional de Desenvolvimento Científico e Tecnológico and Fundação de Amparo à Pesquisa do Estado de São Paulo (Brazil), Natural Science Foundation of China, (People's Republic of China), Ministry of Science, Education, and Sports (Croatia), Ministry of Education, Youth and Sports (Czech Republic), Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique, and Institut National de Physique Nucléaire et de Physique des Particules (France), Bundesministerium für Bildung und Forschung, Deutscher Akademischer Austausch Dienst, and Alexander von Humboldt Stiftung (Germany), OTKA NK 101 428 grant and the Ch. Simonyi Fund (Hungary), Department of Atomic Energy and Department of Science and Technology (India), Israel Science Foundation (Israel), National Research Foundation and WCU program of the Ministry Education Science and Technology (Republic of Korea), Physics Department, Lahore University of Management Sciences (Pakistan), Ministry of Education and Science, Russian Academy of Sciences, Federal Agency of Atomic Energy (Russia), VR and Wallenberg Foundation (Sweden), the US Civilian Research and Development Foundation for the Independent States of the Former Soviet Union, and the US-Israel Binational Science Foundation.

  11. Improvement of Sodium Neutronic Nuclear Data for the Computation of Generation IV Reactors; Contribution a l'amelioration des donnees nucleaires neutroniques du sodium pour le calcul des reacteurs de generation IV

    Energy Technology Data Exchange (ETDEWEB)

    Archier, P.

    2011-09-14

    The safety criteria to be met for Generation IV sodium fast reactors (SFR) require reduced and mastered uncertainties on neutronic quantities of interest. Part of these uncertainties come from nuclear data and, in the particular case of SFR, from sodium nuclear data, which show significant differences between available international libraries (JEFF-3.1.1, ENDF/B-VII.0, JENDL-4.0). The objective of this work is to improve the knowledge on sodium nuclear data for a better calculation of SFR neutronic parameters and reliable associated uncertainties. After an overview of existing {sup 23}Na data, the impact of the differences is quantified, particularly on sodium void reactivity effects, with both deterministic and stochastic neutronic codes. Results show that it is necessary to completely re-evaluate sodium nuclear data. Several developments have been made in the evaluation code Conrad, to integrate new nuclear reactions models and their associated parameters and to perform adjustments with integral measurements. Following these developments, the analysis of differential data and the experimental uncertainties propagation have been performed with Conrad. The resolved resonances range has been extended up to 2 MeV and the continuum range begins directly beyond this energy. A new {sup 23}Na evaluation and the associated multigroup covariances matrices were generated for future uncertainties calculations. The last part of this work focuses on the sodium void integral data feedback, using methods of integral data assimilation to reduce the uncertainties on sodium cross sections. This work ends with uncertainty calculations for industrial-like SFR, which show an improved prediction of their neutronic parameters with the new evaluation. (author) [French] Les criteres de surete exiges pour les reacteurs rapides au sodium de Generation IV (RNR-Na) se traduisent par la necessite d'incertitudes reduites et maitrisees sur les grandeurs neutroniques d'interet. Une part

  12. Experimental reactor regulation: the nuclear safety authority's approach; Le controle des reacteurs experimentaux: la demarche de l'Autorite de surete nucleaire

    Energy Technology Data Exchange (ETDEWEB)

    Rieu, J.; Conte, D.; Chevalier, A. [Autorite de Surete Nucleaire, 75 - Paris (France)

    2007-07-15

    French research reactors can be classified into 6 categories: 1) critical scale models (Eole, Minerve and Masurca) whose purpose is the study of the neutron production through the fission reaction; 2) reactors that produce neutron beams (Orphee, and the high flux reactor in Grenoble); 3) reactors devoted to safety studies (Cabri, Phebus) whose purpose is to reproduce accidental configurations of power reactors in reduced scale; 4) experimental reactors (Osiris, Phenix) whose purpose is the carrying-out of irradiation experiments concerning nuclear fuels or structure materials; 5) teaching reactors (Ulysse, Isis); and 6) reactors involved in defense programs (Caliban, Prospero, Apareillage-B). We have to note that 3 research reactors are currently being dismantled: Strasbourg University's reactor, Siloe and Siloette. Research reactors in France are of different types and present different hazards. Even if methods of control become more and more similar to those of power reactors, the French Nuclear Safety Authority (ASN) works to allow the necessary flexibility in the ever changing research reactor field while ensuring a high level of safety. Adopting the internal authorizations for operations of minor safety significance, under certain conditions, is one example of this approach. Another challenge in the coming years for ASN is to monitor the ageing of the French research reactors. This includes periodic safety reviews for each facility every ten years. But ASN has also to regulate the new research reactor projects such as Jules Horowitz Reactor, International Thermonuclear Experimental Reactor, which are about to be built.

  13. PHENIX Conceptual Design Report

    Energy Technology Data Exchange (ETDEWEB)

    Nagamiya, Shoji; Aronson, Samuel H.; Young, Glenn R.; Paffrath, Leo

    1993-01-29

    The PHENIX Conceptual Design Report (CDR) describes the detector design of the PHENIX experiment for Day-1 operation at the Relativistic Heavy Ion Collider (RHIC). The CDR presents the physics capabilities, technical details, cost estimate, construction schedule, funding profile, management structure, and possible upgrade paths of the PHENIX experiment. The primary goals of the PHENIX experiment are to detect the quark-gluon plasma (QGP) and to measure its properties. Many of the potential signatures for the QGP are measured as a function of a well-defined common variable to see if any or all of these signatures show a simultaneous anomaly due to the formation of the QGP. In addition, basic quantum chromodynamics phenomena, collision dynamics, and thermodynamic features of the initial states of the collision are studied. To achieve these goals, the PHENIX experiment measures lepton pairs (dielectrons and dimuons) to study various properties of vector mesons, such as the mass, the width, and the degree of yield suppression due to the formation of the QGP. The effect of thermal radiation on the continuum is studied in different regions of rapidity and mass. The e[mu] coincidence is measured to study charm production, and aids in understanding the shape of the continuum dilepton spectrum. Photons are measured to study direct emission of single photons and to study [pi][sup 0] and [eta] production. Charged hadrons are identified to study the spectrum shape, production of antinuclei, the [phi] meson (via K[sup +]K[sup [minus

  14. PHENIX Conceptual Design Report

    Energy Technology Data Exchange (ETDEWEB)

    Nagamiya, Shoji; Aronson, Samuel H.; Young, Glenn R.; Paffrath, Leo

    1993-01-29

    The PHENIX Conceptual Design Report (CDR) describes the detector design of the PHENIX experiment for Day-1 operation at the Relativistic Heavy Ion Collider (RHIC). The CDR presents the physics capabilities, technical details, cost estimate, construction schedule, funding profile, management structure, and possible upgrade paths of the PHENIX experiment. The primary goals of the PHENIX experiment are to detect the quark-gluon plasma (QGP) and to measure its properties. Many of the potential signatures for the QGP are measured as a function of a well-defined common variable to see if any or all of these signatures show a simultaneous anomaly due to the formation of the QGP. In addition, basic quantum chromodynamics phenomena, collision dynamics, and thermodynamic features of the initial states of the collision are studied. To achieve these goals, the PHENIX experiment measures lepton pairs (dielectrons and dimuons) to study various properties of vector mesons, such as the mass, the width, and the degree of yield suppression due to the formation of the QGP. The effect of thermal radiation on the continuum is studied in different regions of rapidity and mass. The e[mu] coincidence is measured to study charm production, and aids in understanding the shape of the continuum dilepton spectrum. Photons are measured to study direct emission of single photons and to study [pi][sup 0] and [eta] production. Charged hadrons are identified to study the spectrum shape, production of antinuclei, the [phi] meson (via K[sup +]K[sup [minus

  15. Parton Dynamics at PHENIX

    CERN Document Server

    Osborn, J D

    2015-01-01

    Investigating partonic interactions is one of the primary goals of the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). RHIC is specially tailored for studying intrinsic partonic spin-momentum correlations due to its unique ability to collide polarized proton beams. Transverse single-spin asymmetries of order 10% have been measured in PHENIX at center of mass energies from 62.4 GeV to 200 GeV, similar to previous measurements. These results indicate that there exist partonic transverse momentum effects within the proton and/or within the process of hadronization. The MPC-EX, a new silicon-tungsten preshower detector at PHENIX, has taken data for the first time this year with the intent of shedding further light on the origins of these asymmetries. A review of the status of the detector and of future planned measurements will be presented. An overview of ongoing work by PHENIX aimed at measuring intrinsic partonic transverse momentum will be discussed.

  16. Electron measurement in PHENIX

    Energy Technology Data Exchange (ETDEWEB)

    Akiba, Y. [Univ. of Tokyo, Tanashi (Japan)

    1995-07-15

    Electron Measurement in PHENIX detector at RHIC is discussed. The yield and S/N ratio at vector meson peaks ({phi}, {omega}, {rho}{sup o}, and J/{psi}) are evaluated. The electrons from open charm decay, and its consequence to the di-electron measurements is discussed.

  17. Photon physics with PHENIX

    Energy Technology Data Exchange (ETDEWEB)

    White, S. [Brookhaven National Lab., Upton, NY (United States)

    1995-07-15

    In this Paper the author discusses briefly the physics motivation for extending measurements of particle production with high granularity and particle id capabilities to neutrals in PHENIX. The author then discusses the technique of direct photon measurement in the presence of copious background photons from {pi}{sup o} decays. The experiment will measure relatively low p{sub t} photons near y=0 in the lab frame. This new experimental environment of high multiplicity and low {gamma} momenta will affect both the techniques used and the type of analysis which can be performed. The Phenix Electromagnetic calorimeter is described and its capabilities illustrated with results from simulation and beam tests of the first production array.

  18. PHENIX Fast TOF

    Energy Technology Data Exchange (ETDEWEB)

    Soha, Aria [Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Chiu, Mickey [Brookhaven National Lab. (BNL), Upton, NY (United States); Mannel, Eric [Brookhaven National Lab. (BNL), Upton, NY (United States); Stoll, Sean [Brookhaven National Lab. (BNL), Upton, NY (United States); Lynch, Don [Brookhaven National Lab. (BNL), Upton, NY (United States); Boose, Steve [Brookhaven National Lab. (BNL), Upton, NY (United States); Northacker, Dave [Brookhaven National Lab. (BNL), Upton, NY (United States); Alfred, Marcus [Howard Univ., Washington, DC (United States); Lindesay, James [Howard Univ., Washington, DC (United States); Chujo, Tatsuya [Univ. of Tsukuba (Japan); Inaba, Motoi [Univ. of Tsukuba (Japan); Nonaka, Toshihiro [Univ. of Tsukuba (Japan); Sato, Wataru [Univ. of Tsukuba (Japan); Sakatani, Ikumi [Univ. of Tsukuba (Japan); Hirano, Masahiro [Univ. of Tsukuba (Japan); Choi, Ihnjea [Univ. of Illinois, Urbana-Champaign, IL (United States)

    2014-01-15

    This is a technical scope of work (TSW) between the Fermi National Accelerator Laboratory (Fermilab) and the experimenters of PHENIX Fast TOF group who have committed to participate in beam tests to be carried out during the FY2014 Fermilab Test Beam Facility program. The goals for this test beam experiment are to verify the timing performance of the two types of time-of-flight detector prototypes.

  19. The PHENIX Event Builder

    Science.gov (United States)

    Winter, David

    2004-10-01

    The PHENIX Event Builder is a critical part of the back-end of the PHENIX DAQ. It is reponsible for assembling event fragments from each subsystem into complete events ready for archiving. It allows subsystems to be read out either in parallel or simultaneously while supporting a high rate of archiving. Additionally, it implements an environment where Level-2 trigger algorithms may be optionally executed, providing the ability to tag and/or filter rare physics events. Up to and including RHIC Run-4, the Event Builder was implemented as a set of three Windows NT/2000 multithreaded executables that run on a farm of over 100 dual-cpu 1U servers connected via a Foundry Layer2/3 Gigabit switch. Under this architecture it has been capable of recording a wide range of event sizes from central Au-Au to p-p interactions, with data archiving rates of over 400 MB/s at 2 KHz event rates. Between Runs 4 and 5, the Event Builder will be ported to Linux. Preliminary work has shown we can expect great improvements in performance when moving to this platform for Run 5. The PHENIX Event Builder design and implementation, as well as performance and plans for future development, will be discussed.

  20. The influence of the (n, 2n) and (n, {alpha}) reactions of beryllium on the neutron balance in a BeO or Be moderated reactor and its consequences on the long term reactivity changes; Influence des reactions (n, 2n) et (n, {alpha}) du beryllium sur le bilan neutronique d'un reacteur modere a l'oxyde de beryllium ou au beryllium. Consequences sur l'evolution a long terme de la reactivite

    Energy Technology Data Exchange (ETDEWEB)

    Sahai, K.; Benoist, P.; Horowitz, J. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1958-07-01

    The reaction probabilities in an infinite and homogeneous medium of BeO or Be have been calculated from neutron cross-section curves, for a neutron produced with an energy distribution similar to a fission spectrum; the calculation shows that, after several elastic collisions, the neutron has yet an appreciable probability to undergo a reaction, in spite of the energy degradation in the spectrum due to each collision. This degradation has been calculated, taking into account of anisotropy of the collisions. The gain of the reactivity in a reactor has been obtained after correcting these probabilities for the attenuation of the flux of fission neutrons due to the inelastic scattering in the uranium. Finally, the calculation shows that in a power reactor, this gain of reactivity is in practice destroyed in a few years by the accumulation of poisonous nuclei such as Li{sup 6} and He{sup 3} following (n, {alpha}) reaction. (author) [French] Les probabilites de reaction en milieu infini et homogene de glucine (BeO) ou de beryllium ont ete calculees a partir des courbes de section efficace pour un neutron naissant suivant un spectre de fission; le calcul montre qu'apres plusieurs diffusions elastiques le neutron a encore une probabilite appreciable de subir une reaction, malgre la degradation du spectre a chaque diffusion; cette degradation a ete calculee en tenant compte de l'anisotropie du choc. Le gain de reactivite dans un reacteur a ensuite ete obtenu en corrigeant les probabilites en milieu homogene de l'effet l'attenuation du flux des neutrons de fission par les chocs inelastiques dans les barres d'uranium. Enfin, le calcul montre que, dans un reacteur de puissance, ce gain de reactivite est pratiquement detruit en peu d'annees par l'accumulation de noyaux poisons Li{sup 6} et He{sup 3} consecutive a la reaction (n, {alpha}). (auteur)

  1. Phenix Ramro Jacket

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    Phenix Ramro Jacket表面具有防泼水功能,可以抵御小雨的侵袭,并具备一定的防风效果,可在早晚气温较低的情况下帮助御寒;透气式侧袋即为服装收纳袋,脱下时可以将衣服压缩打包,方便携带;服装底摆采用单手调节橡筋抽绳,可以有效防止冷风钻入。

  2. PHENIX inner detectors

    Energy Technology Data Exchange (ETDEWEB)

    Allen, M.; Bennett, M.J.; Bobrek, M.; Boissevain, J.B.; Boose, S.; Bosze, E.; Britton, C.; Chang, J.; Chi, C.Y.; Chiu, M.; Conway, R.; Cunningham, R.; Denisov, A.; Deshpande, A.; Emery, M.S.; Enokizono, A.; Ericson, N.; Fox, B.; Fung, S.-Y.; Giannotti, P.; Hachiya, T.; Hansen, A.G.; Homma, K.; Jacak, B.V.; Jaffe, D.; Kang, J.H.; Kapustinsky, J.; Kim, S.Y.; Kim, Y.G.; Kohama, T.; Kroon, P.J.; Lenz, W.; Longbotham, N.; Musrock, M.; Nakamura, T.; Ohnishi, H.; Ryu, S.S.; Sakaguchi, A.; Seto, R.; Shiina, T.; Simpson, M.; Simon-Gillo, J.; Sondheim, W.E.; Sugitate, T.; Sullivan, J.P. E-mail: sullivan@lanl.gov; Hecke, H.W. van; Walker, J.W.; White, S.N.; Willis, P.; Xu, N

    2003-03-01

    The timing, location and particle multiplicity of a PHENIX collision are determined by the Beam-Beam Counters (BBC), the Multiplicity/Vertex Detector (MVD) and the Zero-Degree Calorimeters (ZDC). The BBCs provide both the time of interaction and position of a collision from the flight time of prompt particles. The MVD provides a measure of event particle multiplicity, collision vertex position and fluctuations in charged particle distributions. The ZDCs provide information on the most grazing collisions. A Normalization Trigger Counter (NTC) is used to obtain absolute cross-section measurements for p-p collisions. The BBC, MVD and NTC are described below.

  3. New modelling method for fast reactor neutronic behaviours analysis; Nouvelles methodes de modelisation neutronique des reacteurs rapides de quatrieme Generation

    Energy Technology Data Exchange (ETDEWEB)

    Jacquet, P.

    2011-05-23

    Due to safety rules running on fourth generation reactors' core development, neutronics simulation tools have to be as accurate as never before. First part of this report enumerates every step of fast reactor's neutronics simulation implemented in current reference code: ECCO. Considering the field of fast reactors that meet criteria of fourth generation, ability of models to describe self-shielding phenomenon, to simulate neutrons leakage in a lattice of fuel assemblies and to produce representative macroscopic sections is evaluated. The second part of this thesis is dedicated to the simulation of fast reactors' core with steel reflector. These require the development of advanced methods of condensation and homogenization. Several methods are proposed and compared on a typical case: the ZONA2B core of MASURCA reactor. (author) [French] Les criteres de surete qui regissent le developpement de coeurs de reacteurs de quatrieme generation implique l'usage d'outils de calcul neutronique performants. Une premiere partie de la these reprend toutes les etapes de modelisation neutronique des reacteurs rapides actuellement d'usage dans le code de reference ECCO. La capacite des modeles a decrire le phenomene d'autoprotection, a representer les fuites neutroniques au niveau d'un reseau d'assemblages combustibles et a generer des sections macroscopiques representatives est appreciee sur le domaine des reacteurs rapides innovants respectant les criteres de quatrieme generation. La deuxieme partie de ce memoire se consacre a la modelisation des coeurs rapides avec reflecteur acier. Ces derniers necessitent le developpement de methodes avancees de condensation et d'homogenisation. Plusieurs methodes sont proposees et confrontees sur un probleme de modelisation typique: le coeur ZONA2B du reacteur maquette MASURCA

  4. The EPR reactor; Le reacteur EPR

    Energy Technology Data Exchange (ETDEWEB)

    Lacoste, A.C.; Dupuy, Ph.; Gupta, O.; Perez, J.R.; Emond, D. [Direction Generale de la Surete Nucleaire et de la Radioprotection, 75 - Paris (France); Cererino, G.; Rousseau, J.M.; Jeffroy, F.; Evrard, J.M. [Institut de Radioprotection et de Surete Nucleaire (IRSN), Dir. de la Surete des Reacteurs, 92 - Clamart (France); Seiler, J.M. [CEA Cadarache (DEN/DTN), 13 - Saint-Paul-lez-Durance (France); Azarian, G. [FRAMATOME ANP, 92 - Paris-La-Defence (France); Chaumont, B. [Institut de Radioprotection et de Surete Nucleaire (IRSN/DSR), 92 - Fontenay-aux-Roses (France); Dubail, A. [Electricite de France (EDF), 78 - Chatou (France); Fischer, M. [Framatome ANP GmbH, Erlangen (Germany); Tiippana, P.; Hyvarinen, J. [Stuk, Autorite de Surete Nucleaire et de Radioprotection (Finland); Zaleski, C.P.; Meritet, S. [Paris-9 Univ. Dauphine, Centre de Geopolitique de l' Energie et des Matieres Premieres, 75 (France); Iglesias, F.; Vincent, C. [Direction Generale de l' Energie et des Matieres Premieres, 75 - Paris (France); Massart, S.; Graillat, G. [Electricite de France (EDF), 75 - Paris (France); Esteve, B. [AREVA/Framatome, 75 - Paris (France); Mansillon, Y. [Commission Nationale de Debat Public, 75 - Paris (France); Gatinol, C. [Assemblee Nationale, 75 - Paris (France); Carre, F. [CEA, Dir. de Programme Systemes du Futur, France (France)

    2005-05-01

    This document reviews economical and environmental aspects of the EPR project. The following topics are discussed: role and point of view of the French Nuclear Safety Authority on EPR, control of design and manufacturing of EPR by the French Nuclear Safety Authority, assessment by IRSN of EPR safety, research and development in support of EPR, STUK safety review of EPR design, standpoint on EPR, the place of EPR in the French energy policy, the place of EPR in EDF strategy, EPR spearhead of nuclear rebirth, the public debate, the local stakes concerning the building of EPR in France at Flamanville (Manche) and the research on fourth generation reactors. (A.L.B.)

  5. Study of diluting and absorber materials to control reactivity during a postulated core melt down accident in Generation IV reactors; Etude des materiaux sacrificiels absorbants et diluants pour le controle de la reactivite dans le cas d'un accidnet hypothetique de fusion du coeur de reacteurs de quatrieme generation

    Energy Technology Data Exchange (ETDEWEB)

    Plevacova, K.

    2010-12-16

    In order to limit the consequences of a hypothetical core meltdown accident in Generation IV Sodium Fast Reactors, absorber materials in or near the core, such as boron carbide B{sub 4}C, and diluting materials in the core catcher will be used to prevent recriticality within the mixture of molten oxide fuel and molten structures called corium. The aim of the PhD thesis was to select materials of both types and to understand their behaviour during their interaction with corium, from chemical and thermodynamic point of view. Concerning B{sub 4}C, thermodynamic calculations and experiments agree with the formation of two immiscible phases at high temperature in the B{sub 4}C - UO{sub 2} system: one oxide and one boride. This separation of phases can reduce the efficiency of the neutrons absorption inside the molten fuel contained in the oxide phase. Moreover, a volatilization of a part of the boron element can occur. According to these results, the necessary quantity of B{sub 4}C to be introduced should be reconsidered for postulated severe accident sequence. Other solution could be the use of Eu{sub 2}O{sub 3} or HfO{sub 2} as absorber material. These oxides form a solid solution with the oxide fuel. Concerning the diluting materials, mixed oxides Al{sub 2}O{sub 3} - HfO{sub 2} and Al{sub 2}O{sub 3} - Eu{sub 2}O{sub 3} were preselected. These systems being completely unknown to date at high temperature in association with UO{sub 2}, first points on the corresponding ternary phase diagrams were researched. Contrary to Al{sub 2}O{sub 3} - Eu{sub 2}O{sub 3} - UO{sub 2} system, the Al{sub 2}O{sub 3} - HfO{sub 2} - UO{sub 2} mixture presents only one eutectic and thus only one solidification path which makes easier forecasting the behaviour of corium in the core catcher. (author) [French] Resume: Afin de limiter les consequences d'un accident grave avec la fusion du coeur dans un reacteur a neutrons rapides de generation IV refroidi au sodium, la recriticite doit

  6. PHENIX Spin Program, Recent Results

    CERN Document Server

    Bazilevsky, A; Aidala, C; Ajitanand, N N; Akiba, Y; Alexander, J; Amirikas, R; Aphecetche, L; Aronson, S H; Averbeck, R; Awes, T C; Azmoun, R; Babintsev, V; Baldisseri, Alberto; Barish, K N; Barnes, P D; Bassalleck, B; Bathe, S; Batsouli, S; Baublis, V; Bazilevsky, A; Belikov, S; Berdnikov, Yu A; Bhagavatula, S; Boissevain, J G; Borel, H; Borenstein, S R; Brooks, M L; Brown, D S; Bruner, N; Bucher, D; Büsching, H; Bumazhnov, V; Bunce, G; Burward-Hoy, J M; Butsyk, S; Camard, X; Chai, J S; Chand, P; Chang, W C; Chernichenko, S; Chi, C Y; Chiba, J; Chiu, M; Choi, I J; Choi, J; Choudhury, R K; Chujo, T; Cianciolo, V; Cobigo, Y; Cole, B A; Constantin, P; D'Enterria, D G; Dávid, G; Delagrange, H; Denisov, A; Deshpande, Abhay A; Desmond, E J; Devismes, A; Dietzsch, O; Drapier, O; Drees, A; Drees, K A; Du Rietz, R; Durum, A; Dutta, D; Efremenko, Yu V; El-Chenawi, K F; Enokizono, A; Enyo, H; Esumi, S; Ewell, L A; Fields, D E; Fleuret, F; Fokin, S L; Fox, B D; Fraenkel, Zeev; Frantz, J E; Franz, A; Frawley, A D; Fung, S Y; Garpman, S; Ghosh, K; Glenn, A; Gogiberidze, G; Gonin, M; Gosset, J; Goto, Y; Granier de Cassagnac, R; Grau, N; Greene, S V; Grosse-Perdekamp, M; Guryn, W; Gustafsson, Hans Åke; Hachiya, T; Haggerty, J S; Hamagaki, H; Hansen, A G; Hartouni, E P; Harvey, M; Hayano, R; Hayashi, N; He, X; Heffner, M; Hemmick, T K; Heuser, J M; Hibino, M; Hill, J C; Holzmann, W; Homma, K; Hong, B; Hoover, A; Ichihara, T; Ikonnikov, V V; Imai, K; Isenhower, D; Ishihara, M; Issah, M; Isupov, A; Jacak, B V; Jang, W Y; Jeong, Y; Jia, J; Jinnouchi, O; Johnson, B M; Johnson, S C; Joo, K S; Jouan, D; Kametani, S; Kamihara, N; Kang, J H; Kapoor, S S; Katou, K; Kelly, S; Khachaturov, B; Khanzadeev, A; Kikuchi, J; Kim, D H; Kim, D J; Kim, D W; Kim, E; Kim, G B; Kim, H J; Kistenev, E P; Kiyomichi, A; Kiyoyama, K; Klein-Bösing, C; Kobayashi, H; Kochenda, L; Kochetkov, V; Koehler, D; Kohama, T; Kopytine, M; Kotchetkov, D; Kozlov, A; Kroon, P J; Kuberg, C H; Kurita, K; Kuroki, Y; Kweon, M J; Kwon, Y; Kyle, G S; Lacey, R; Ladygin, V P; Lajoie, J G; Lebedev, A; Leckey, S; Lee, D M; Lee, S; Leitch, M J; Li, X H; Lim, H; Litvinenko, A G; Liu, M X; Liu, Y; Maguire, C F; Makdisi, Y I; Malakhov, A; Man'ko, V I; Mao, Y; Martínez, G; Marx, M D; Masui, H; Matathias, F; Matsumoto, T; McGaughey, P L; Melnikov, E A; Messer, F; Miake, Y; Milan, J; Miller, T E; Milov, A; Mioduszewski, S; Mischke, R E; Mishra, G C; Mitchell, J T; Mohanty, A K; Morrison, D P; Moss, J M; Muhlbacher, F; Mukhopadhyay, D; Muniruzzaman, M; Murata, J; Nagamiya, S; Nagle, J L; Nakamura, T; Nandi, B K; Nara, M; Newby, J; Nilsson, P; Nyanin, A S; Nystrand, J; O'Brien, E; Ogilvie, C A; Ohnishi, H; Ojha, I D; Okada, K; Ono, M; Onuchin, V A; Oskarsson, A; Otterlund, I; Oyama, K; Ozawa, K; Pal, D; Palounek, A P T; Pantuev, V S; Papavassiliou, V; Park, J; Parmar, A; Pate, S F; Peitzmann, T; Peng, J C; Peresedov, V; Pinkenburg, C; Pisani, R P; Plasil, F; Purschke, M L; Purwar, A K; Rak, J; Ravinovich, I; Read, K F; Reuter, M; Reygers, K; Riabov, V; Riabov, Y; Roche, G; Romana, A; Rosati, M; Rosnet, P; Ryu, S S; Sadler, M E; Saitô, N; Sakaguchi, T; Sakai, M; Sakai, S; Samsonov, V; Sanfratello, L; Santo, R; Sato, H D; Sato, S; Sawada, S; Schutz, Y; Semenov, V; Seto, R; Shaw, M R; Shea, T K; Shibata, T A; Shigaki, K; Shiina, T; Silva, C L; Silvermyr, D; Sim, K S; Singh, C P; Singh, V; Sivertz, M; Soldatov, A; Soltz, R A; Sondheim, W E; Sørensen, S P; Sourikova, I V; Staley, F; Stankus, P W; Stenlund, E; Stepanov, M; Ster, A; Stoll, S P; Sugitate, T; Sullivan, J P; Takagui, E M; Taketani, A; Tamai, M; Tanaka, K H; Tanaka, Y; Tanida, K; Tannenbaum, M J; Tarjan, P; Tepe, J D; Thomas, T L; Tojo, J; Torie, H A; Towell, R S; Tserruya, Itzhak; Tsuruoka, H; Tuli, S K; Tydesjo, H; Tyurin, N; van Hecke, H W; Velkovska, J; Velkovsky, M; Veszpremi, V; Villatte, L; Vinogradov, A A; Volkov, M A; Vznuzdaev, E A; Wang, X R; Watanabe, Y; White, S N; Wohn, F K; Woody, C L; Xie, W; Yang, Y; Yanovich, A A; Yokkaichi, S; Young, G R; Yushmanov, I E; Zajc, W A; Zhang, C; Zhou, S; Zhou, S J; Zolin, L S; Adler, S S; Bazilevsky, Alexander

    2005-01-01

    Acceleration of polarized protons in Relativistic Heavy Ion Collider (RHIC) provides unique tool to study the spin structure of the nucleon. We give a brief overview of the PHENIX program to investigate poorly known gluon and flavor decomposed see quark polarization in the proton, utilizing polarized proton collisions at RHIC. We report PHENIX first results on transverse single-spin asymmetry in pi0 and charged hadron production and longitudinal double-spin asymmetry in pi0 production at mid-rapidity.

  7. The PHENIX final texts

    Energy Technology Data Exchange (ETDEWEB)

    Vasile, A.; Fontaine, B.; Vanier, M.; Gauthe, P.; Pascal, V.; Prulhiere, G.; Jaecki, P.; Martin, L. [CEA Cadarache, 13 - Saint Paul lez Durance (France); Tenchine, D. [CEA Grenoble, 38 (France); Sauvage, J.F. [Electricite de France (EDF/SEPTEN), 69 - Villeurbanne (France); Dupraz, R.; Woaye Hune, A. [AREVA NP, 75 - Paris (France)

    2010-11-15

    The 250 MWe (140 MWe since 1993) PHENIX sodium cooled fast reactor was shut down on March 6, 2009. Before decommissioning, a final set of tests was performed during May 2009 - January 2010. These tests covered core physics, fuel behaviour and thermal-hydraulics areas. Detailed analysis of the tests results is ongoing. It will be used for the extension of the validation of ERANOS and DARWIN codes for core physics, TRIO{sub U} and CATHARE for thermal-hydraulics and GERMINAL for fuel behaviour. In addition, the program included 2 tests related to the comprehension of the four negative reactivity transients (AURN) experienced during the reactor operation in 1989 and 1990 and not yet fully explained. This was also a great opportunity to involve young engineers in the different processes like the design of the tests, their carrying out and the analysis of the results. The standard instrumentation of the reactor was completed by specifically designed devices. (authors)

  8. Draft of the PHENIX Management Plan

    Energy Technology Data Exchange (ETDEWEB)

    1994-03-10

    The PHENIX Management Plan provides the baselines and controls that the PHENIX and RHIC Projects will follow to meet the technical, cost, and schedule goals for the PHENIX detector at RHIC. This plan will be reviewed and updated as required, with revisions made by agreement among the signed participants.

  9. The Phenix final tests

    Energy Technology Data Exchange (ETDEWEB)

    Vasile, A.; Fontaine, B.; Vanier, M.; Gauthe, P.; Pascal, V.; Prulhiere, G.; Jaecki, P. [CEA Cadarache, BP 1, 13108 St Paul Lez Durance (France); Tenchine, D. [CEA Grenoble (France); Martin, L. [Centrale Phenix - CEA Marcoule (France); Sauvage, J.F. [EDF / SEPTEN - 12 av. Dutrievoz 69628 Villeurbanne (France); Dupraz, R.; Woaye-Hune, A. [AREVA NP - 10 rue Juliette Recamier 69456 LYON Cedex (France)

    2010-07-01

    The 250 MWe (140 MWe since 1993) Phenix sodium cooled fast reactor was shut down on March 6, 2009. Before decommissioning, a final set of tests were performed during the May 2009 - January 2010 period covering core physics, fuel behaviour and thermal-hydraulics areas. Detailed analysis of the tests results is ongoing. It will be used for the extension of the validation of ERANOS and DARWIN codes for core physics, TRIO-U and CATHARE for Thermal-hydraulics and GERMINAL for fuel behaviour. In addition, the program included two tests related to the comprehension of the four negative reactivity transients (AURN in French acronym) experienced during the reactor operation in '89 and '90 and not yet fully explained. This was also a great opportunity to involve young engineers in the different processes like the design of the tests, their carrying out, and the analysis of the results. The standard instrumentation of the reactor was completed by specifically designed devises. (authors)

  10. PHENIX recent heavy flavor results

    Energy Technology Data Exchange (ETDEWEB)

    Lim, Sanghoon

    2014-06-15

    Cold nuclear matter (CNM) effects provide an important ingredient to interpret the results from heavy-ion collisions. Such effects include nuclear shadowing, intrinsic parton transverse momentum broadening, and initial patron energy loss. The measurement of heavy quark production is a good probe to study the CNM effects particularly on gluons, since heavy quarks are mainly produced via gluon fusions at RHIC energy. The PHENIX experiment has an ability to study the CNM effects by measuring leptons from heavy-flavor decay in a broad kinematic range. Comparisons of the results measured in different rapidity regions allow us to study modification of gluon density function in the Au nucleus depending on parton fractional momentum x. In addition, comparisons to the results from heavy-ion collisions (Au + Au and Cu + Cu) measured by PHENIX provide an insight into the role of CNM effects in such collisions. Recent PHENIX results on heavy quark production are discussed in this presentation.

  11. The Pegase reactor loops; Les boucles du reacteur Pegase

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1968-07-01

    After 4 years operation, experimentation and maintenance of the gas loops built especially for the nuclear fuel testing reactor Pegase, it appears desirable not only to gather together in a single document the essential characteristics and particularities of these devices and of their associated equipment, but also to give the reasons for the technical modifications and the way in which they were carried out; this is done here by the persons themselves who were responsible, day after day, for operating these loops. This essentially practically experience thus complements the careful research and preliminary testing carried out on these loops or on their prototypes. It should be of interest to those who deal with problems concerned with the design or operation of irradiation loops in experimental reactors or of similar equipment. (authors) [French] Apres 4 annees de fonctionnement, d'experimentation et d'entretien sur les boucles a gaz, construites specialement pour le reacteur d'essai des combustibles nucleaires Pegase, il a paru souhaitable non seulement de rassembler dans un meme document les caracteristiques et les particularites essentielles de ces dispositifs et des appareillages qui leur sont associes, mais aussi d'y preciser les raisons et les modalites des mises au point techniques, apportees par ceux qui, jour apres jour pendant cette periode, ont eu la charge de mettre en oeuvre ces boucles. Cette experience essentiellement pratique complete donc les etudes minutieuses et les essais preliminaires de ces boucles ou de leurs prototypes. Elle doit etre de quelque interet pour ceux qui sont confrontes aux problemes de conception ou d'exploitation de boucles d'irradiation dans des reacteurs experimentaux ou des dispositifs analogues. (auteurs)

  12. sPHENIX: An Upgrade Concept from the PHENIX Collaboration

    CERN Document Server

    Aidala, C; Akiba, Y; Akiba, Y; Akimoto, R; Alexander, J; Aoki, K; Apadula, N; Asano, H; Asano, H; Atomssa, E T; Awes, T C; Azmoun, B; Babintsev, V; Bai, M; Bai, X; Bandara, N; Bannier, B; Barish, K N; Baron, O; Bassalleck, B; Bathe, S; Bathe, S; Baublis, V; Baumann, C; Baumgart, S; Bazilevsky, A; Beaumier, M; Belmont, R; Benjamin, G; Berdnikov, A; Berdnikov, Y; Bing, X; Black, D; Blackburn, J; Blau, D S; Bobrek, M; Bok, J; Bok, J; Boose, S; Boyle, K; Britton, C L; Brooks, M L; Bryslawskyj, J; Buesching, H; Bumazhnov, V; Butler, C; Butsyk, S; Campbell, S; Carollo, A; Chai, J -S; Chen, C -H; Chernichenko, S; Chi, C Y; Chiu, M; Choi, I J; Choi, J B; Choi, S; Chollet, S; Christiansen, P; Chujo, T; Cianciolo, V; Cole, B A; Cronin, N; Crossett, N; D'Orazio, L; Dairaku, S; Dairaku, S; Datta, A; Daugherity, M S; David, G; DeBlasio, K; Debraine, A; Dehmelt, K; Denisov, A; Deshpande, A; Deshpande, A; Desmond, E J; Dietzsch, O; Ding, L; Do, J H; Donadelli, M; Drapier, O; Drees, A; Drees, K A; Durham, J M; Durum, A; Eberle, L; Edwards, S; Efremenko, Y V; Engelmore, T; Enokizono, A; Esumi, S; Eyser, K O; Eyser, K O; Fadem, B; Fields, D E; Finger, M; Finger, M; Fleuret, F; Fokin, S L; Frantz, J E; Franz, A; Frawley, A D; Fukao, Y; Fukao, Y; Fusayasu, T; Gainey, K; Gal, C; Garg, P; Garishvili, A; Garishvili, I; Gastaldi, F; Ge, H; Giannotti, P; Giordarno, F; Glenn, A; Gong, X; Gonin, M; Goto, Y; Goto, Y; de Cassagnac, R Granier; Grau, N; Greene, S V; Perdekamp, M Grosse; Gu, Y; Gunji, T; Guragain, H; Haggerty, J S; Hahn, K I; Hamagaki, H; Han, S Y; Hanks, J; Hashimoto, K; Hashimoto, K; Hayano, R; Hayashi, S; He, X; Hemmick, T K; Hester, T; Hill, J C; Hoefferkamp, M; Hollis, R S; Homma, K; Hong, B; Hori, Y; Hoshino, T; Huang, J; Huang, S; Hutchins, J R; Ichihara, T; Ichihara, T; Ikeda, Y; Imai, K; Imazu, Y; Imrek, J; Inaba, M; Iordanova, A; Isenhower, D; Isinhue, A; Ivanischev, D; Ivanov, V; Jacak, B V; Jeon, S J; Jezghani, M; Jia, J; Jia, J; Jiang, X; Johnson, B M; Joo, K S; Jouan, D; Jumper, D S; Kamin, J; Kanda, S; Kang, B H; Kang, J H; Kang, J S; Kapustinsky, J; Karatsu, K; Karatsu, K; Kawall, D; Kazantsev, A V; Kehayias, H -J; Key, J A; Khachatryan, V; Khandai, P K; Khanzadeev, A; Kijima, K M; Kim, C; Kim, D H; Kim, D J; Kim, E -J; Kim, H J; Kim, K -B; Kim, Y -J; Kim, Y K; Kistenev, E; Klatsky, J; Kleinjan, D; Kline, P; Koblesky, T; Kochenda, L; Kofarago, M; Komatsu, Y; Komkov, B; Koster, J; Kotchetkov, D; Kotov, D; Kravtsov, P; Krizek, F; Kurita, K; Kuriyama, M; Kurosawa, M; Kurosawa, M; Kwon, Y; Lacey, R; Lai, Y S; Lajoie, J G; Lebedev, A; Lee, G H; Lee, J; Lee, K B; Lee, K S; Lee, S H; Lefferts, R; Leitch, M J; Leite, M A L; Leitgab, M; Lewis, B; Li, X; Lim, S H; Lipski, A; Liu, M X; Love, B; Lynch, D; Lynch, M; Maguire, C F; Makdisi, Y I; Makek, M; Makek, M; Manion, A; Manko, V I; Mannel, E; Maruyama, T; Masumoto, S; McCumber, M; McGaughey, P L; McGlinchey, D; McKay, R; McKinney, C; Meles, A; Mendoza, M; Menegasso, R; Meredith, B; Miake, Y; Mibe, T; Mignerey, A C; Milov, A; Mishra, D K; Mitchell, J T; Miyasaka, S; Miyasaka, S; Mizuno, S; Mohanty, A K; Morrison, D P; Moskowitz, M; Motschwiller, S; Moukhanova, T V; Murakami, T; Murakami, T; Murata, J; Murata, J; Mwai, A; Nagae, T; Nagamiya, S; Nagle, J L; Nagy, M I; Nagy, M I; Nakagawa, I; Nakagawa, I; Nakamiya, Y; Nakamura, K R; Nakamura, K R; Nakamura, T; Nakano, K; Nakano, K; Nattrass, C; Nederlof, A; Netrakanti, P K; Nihashi, M; Nihashi, M; Niida, T; Ninomiya, K; Ninomiya, K; Northacker, D; Nouicer, R; Nouicer, R; Novak, T; Novitzky, N; Nukariya, A; Nyanin, A S; O'Brien, E; Ogilvie, C A; Oide, H; Okada, K; Oskarsson, A; Ozawa, K; Ozawa, K; Pak, R; Pancake, C; Pantuev, V; Papavassiliou, V; Park, I H; Park, S; Park, S K; Pate, S F; Patel, L; Peng, J -C; Perepelitsa, D; Perera, G D N; Peressounko, D Yu; Perry, J; Petti, R; Pinkenburg, C; Pisani, R P; Popule, J; Purschke, M L; Qu, H; Radhakrishnan, S; Rak, J; Ravinovich, I; Read, K F; Read, K F; Reynolds, R; Riabov, V; Riabov, Y; Richardson, E; Riveli, N; Roach, D; Rolnick, S D; Rosati, M; Roschin, E; Ryu, M S; Safonov, A; Sahlmueller, B; Saito, N; Sakaguchi, T; Sako, H; Samsonov, V; Sano, M; Sarsour, M; Sato, S; Sawada, S; Schaefer, B; Sedgwick, K; Seele, J; Seidl, R; Seidl, R; Sekiguchi, Y; Sen, A; Seto, R; Sett, P; Shafto, E; Sharma, D; Shaver, A; Shein, I; Shibata, T -A; Shibata, T -A; Shigaki, K; Shimomura, M; Shoji, K; Shukla, P; Sicho, P; Sickles, A; Silva, C L; Silvermyr, D; Singh, B K; Singh, C P; Singh, V; Sippach, F W; Skolnik, M; Solano, S; Soldatov, A; Soltz, R A; Sondheim, W E; Sorensen, S P; Soumya, M; Sourikova, I V; Srivastava, P K; Stankus, P W; Steinberg, P; Stenlund, E; Stepanov, M; Ster, A; Stevens, L; Stoll, S P; Stone, M R; Sugitate, T; Sukhanov, A; Sun, J; Sziklai, J; Takagui, E M; Takahara, A; Taketani, A; Taketani, A; Tanaka, Y; Tanida, K; Tanida, K; Tannenbaum, M J; Tarafdar, S; Taranenko, A; Tate, A

    2012-01-01

    The PHENIX collaboration presents a concept for a major upgrade to the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). This upgrade, referred to as sPHENIX, brings exciting new capability to the RHIC program by opening new and important channels for experimental investigation and utilizing fully the luminosity of the recently upgraded RHIC facility. sPHENIX enables a compelling jet physics program that will address fundamental questions about the nature of the strongly coupled quark-gluon plasma discovered experimentally at RHIC to be a perfect fluid. The upgrade concept addresses specific questions whose answers are necessary to advance our understanding of the quark-gluon plasma: (1) How to reconcile the observed strongly coupled quark-gluon plasma with the asymptotically free theory of quarks and gluons? (2) What are the dynamical changes to the quark-gluon plasma in terms of quasiparticles and excitations as a function of temperature? (3) How sharp is the transition of the quark-gluon plasm...

  13. Study of the open charm and Drell-Yan production in p + p collisions at 200 GeV with the Phenix detector at RHIC; Etude de la production de charme ouvert et de Drell-Yan dans les collisions p + p a 200 GeV avec le detecteur Phenix a RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Gadrat, S

    2005-09-15

    Ultra-relativistic heavy ions collisions allow the study of nuclear matter under extreme conditions of temperature and pressure and, more specifically, of a new phase of nuclear matter: the quarks and gluons plasma (QGP). The RHIC collider, located at the Brookhaven National Laboratory (Usa), produces such collisions. PHENIX, one of the four operational detectors at the collider, is the only one capable of measuring muons. In this dissertation, we present a dimuon data analysis, which data have been collected by PHENIX in p + p collisions during two data taking runs (3 and 4). p + p collisions provide a requisite reference for the understanding of heavy ions collisions. The aim of the analysis discussed in this dissertation is to extract the cross sections of the main physical components of the dimuon spectrum observed at RHIC for p + p collisions: J/{psi}, open charm and Drell-Yan. This analysis is based on a global line shape fit of the dimuon mass spectrum. This fit has been possible thanks to prior simulation study of the mass distribution shapes of these different components. Production yields were obtained from the fit. Lastly, the response function study for each components and the use of various efficiencies led to the estimate of the different production cross sections. The results have been compared to other existing measurements and show an overall good agreement. The work presented in this dissertation offers a first estimate of the open charm production cross section in the dimuon channel, as well as a first estimate of the Drell-Yan production cross section at RHIC for p + p collisions: {sigma}(J/{psi} {yields} {mu}{mu}) = (2.9 {+-} 0.1) {mu}b; {sigma}(cc-bar {yields} {mu}{mu}) = (0.96 {+-} 0.18) mb; {sigma}(Drell-Yan {yields} {mu}{mu}) = (0.20 {+-} 0.04) {mu}b.

  14. Preliminary studies leading to a conceptual design of a 1000 MWe fast neutron reactor; Etudes preliminaires conduisant a un concept de reacteur a neutrons rapides de 1000 MWe

    Energy Technology Data Exchange (ETDEWEB)

    Vendryes, G.; Zaleski, C.P. [Association Euratom-CEA Cadarache (France). Centre d' Etudes Nucleaires

    1964-07-01

    This report presents the results of studies which seemed important to undertake in connexion with the development of fast neutron reactors. - It points out the advantage of high internal breeding ratios ({approx}1, 1) which are necessary in order to get a small change in time both in power distribution and reactivity (less: than 0.005 {delta}k/k in 18 months). - It shows how to achieve this goal, when simultaneously power distribution flattening is obtained. These results in a higher mean specific power (which is an economic gain) and therefore in a smaller doubling time (about 10 years). - It attempts to find criteria concerning the specific power that should be used in future reactor designs -It presents a conceptional design of a 1000 MWe fast neutron reactor, for the realisation of which no technological impossibility appears. - It shows that the dynamic behaviour seems satisfactory despite a positive total isothermal sodium coefficient. - It tries to predict the development of fast reactors within the future total nuclear program. It does not appear that fissile materials supply problems should in France slow down the development of fast neutron reactors, which will be essentially tied up to its economical ability to produce cheap electric power. (authors) [French] Ce rapport presente les etudes qu'il nous a paru important d'aborder dans le cadre du developpement des reacteurs a neutrons rapides. - Il met en evidence l'interet des taux de regeneration internes eleves ({approx}1, 1) pour obtenir une bonne evolution dans le temps de la distribution de puissance et de la reactivite (moins de 0,005 {delta}k/k pour 18 mois). - Il montre la possibilite d'y parvenir tout en applatissant la distribution des fissions, ce qui se traduit par une puissance specifique moyenne plus elevee (gain economique), et donc un temps de doublement plus faible de l'ordte de 10 ans - Il tente de definir un optimum de la puissance specifique valable pour les

  15. PHENIX on-line systems

    Energy Technology Data Exchange (ETDEWEB)

    Adler, S.S.; Allen, M.; Alley, G.; Amirikas, R.; Arai, Y.; Awes, T.C.; Barish, K.N.; Barta, F.; Batsouli, S.; Belikov, S.; Bennett, M.J.; Bobrek, M.; Boissevain, J.G.; Boose, S.; Britton, C.; Britton, L.; Bryan, W.L.; Cafferty, M.M.; Carey, T.A.; Chang, W.C.; Chi, C.Y.; Chiu, M.; Cianciolo, V.; Cole, B.A.; Constantin, P.; Cook, K.C.; Cunitz, H.; Desmond, E.J.; Ebisu, K.; Efremenko, Y.V.; El Chenawi, K.; Emery, M.S.; Engo, D.; Ericson, N.; Fields, D.E.; Frank, S.; Frantz, J.E.; Franz, A.; Frawley, A.D.; Fried, J.; Gannon, J.; Gee, T.F.; Gentry, R.; Giannotti, P.; Gustafsson, H.-A.; Haggerty, J.S.; Hahn, S.; Halliwell, J.; Hamagaki, H.; Hansen, A.G.; Hara, H.; Harder, J.; He, X.; Heistermann, F.; Hemmick, T.K.; Hibino, M.; Hill, J.C. E-mail: jhill@iastate.edu; Homma, K.; Jacak, B.V.; Jagadish, U.; Jia, J.; Kajihara, F.; Kametani, S.; Kamyshkov, Y.; Kandasamy, A.; Kang, J.H.; Kapustinsky, J.; Katou, K.; Kelley, M.A.; Kelly, S.; Kikuchi, J.; Kim, S.Y.; Kim, Y.G.; Kistenev, E.; Kotchetkov, D.; Kurita, K.; Lajoie, J.G.; Lenz, M.; Lenz, W.; Li, X.H.; Lin, S.; Liu, M.X.; Markacs, S.; Matathias, F.; Matsumoto, T.; Mead, J.; Mischke, R.E.; Mishra, G.C.; Moore, A.; Muniruzzamann, M.; Musrock, M.; Nagle, J.L.; Nandi, B.K.; Newby, J.; Nystrand, J.; O' Brien, E.; O' Connor, P.; Ohnishi, H.; Oskarsson, A.; Osterman, L.; Oyama, K.; Paffrath, L.; Pancake, C.E.; Pantuev, V.S.; Petridis, A.N.; Pisani, R.P.; Plagge, T.; Plasil, F.; Purschke, M.L.; Rankowitz, S.; Rao, R.; Rau, M.; Read, K.F.; Ryu, S.S.; Sakaguchi, T.; Sato, H.D.; Seto, R.; Shiina, T.; Silvermyr, D.; Simon-Gillo, J.; Simpson, M.; Sippach, W.; Skank, H.D.; Skutnik, S.; Sleege, G.A.; Smith, G.D.; Smith, M.; Stankus, P.W.; Steinberg, P.; Sugitate, T.; Sullivan, J.P.; Taketani, A.; Tamai, M.; Tanaka, Y.; Thomas, W.D.; Todd, R.; Toldo, F.; Turner, G.; Ushiroda, T.; Velkovska, J.; Hecke, H.W. van; Lith, M. van; Villatte, L.; Achen, W. von; Walker, J.W.; Wang, H.Q.; White, S.N.; Wintenberg, A.L.; Witzig, C.; Wood, L.[and others

    2003-03-01

    The PHENIX On-Line system takes signals from the Front End Modules (FEM) on each detector subsystem for the purpose of generating events for physics analysis. Processing of event data begins when the Data Collection Modules (DCM) receive data via fiber-optic links from the FEMs. The DCMs format and zero suppress the data and generate data packets. These packets go to the Event Builders (EvB) that assemble the events in final form. The Level-1 trigger (LVL1) generates a decision for each beam crossing and eliminates uninteresting events. The FEMs carry out all detector processing of the data so that it is delivered to the DCMs using a standard format. The FEMs also provide buffering for LVL1 trigger processing and DCM data collection. This is carried out using an architecture that is pipelined and deadtimeless. All of this is controlled by the Master Timing System (MTS) that distributes the RHIC clocks. A Level-2 trigger (LVL2) gives additional discrimination. A description of the components and operation of the PHENIX On-Line system is given and the solution to a number of electronic infrastructure problems are discussed.

  16. Modelisation de la synthese reactive de poudres ultrafines dans un reacteur a plasma thermique

    Science.gov (United States)

    Desilets, Martin

    La presente these s'inscrit dans le cadre de la modelisation mathematique des ecoulements a plasmas thermiques inertes et reactifs. Elle vise plus precisement a combler les lacunes des modeles existants en portant une attention particuliere aux phenomenes de transport multicomposant et a la prediction des transformations chimiques. Pour repondre a ces attentes et ainsi poursuivre le developpement dans ce domaine, un modele global a ete developpe. Il combine la resolution d'equations conservatives pour la masse, l'energie et le momentum. La generation d'un plasma inductif (h.f ) y est traitee au moyen d'equations representant les champs electromagnetiques. La nucleation et la croissance de poudres ultrafines sont incluses dans le modele via l'analyse des principaux moments de la distribution des tailles de particules. Enfin, tous les phenomenes physico-chimiques d'importance dans un milieu comme les plasmas thermiques, de meme que lem interactions, sont consideres. Le modele est applique ici a l'analyse de trois problematiques differentes et complementaires. La premiere concerne l'etude du melange gazeux d'un jet froid (He, N 2 ou O2), injecte au coeur d'une decharge d'argon/hydrogene ou d'argon/oxygene. La comparaison des predictions du modele avec des mesures experimentales obtenues par une sonde enthalpique permet une validation partielle de ce dernier. La deuxieme problematique a trait a l'etude numerique de la pyrolyse du methane en reacteur a plasma h.f. Elle met en evidence les difficultes de convergence de la methode numerique lorsque appliquee a la resolution d'ecoulements reactifs a haute temperature. Finalement, le dernier sujet aborde dans cette these, soit l'analyse systematique des principales conditions d'operation d'un reacteur h.f utilise pour la synthese reactive de poudres ultrafines de silicium, engage tous les elements theoriques du modele. Il implique en effet la decomposition thermique d'un precurseur gazeux, le tetrachlorure de silicium, la

  17. The future of PHENIX: upgrading to sPHENIX and beyond

    Directory of Open Access Journals (Sweden)

    Mannel E.J.

    2015-01-01

    Full Text Available sPHENIX is a major upgrade to the PHENIX detector enabling high-rate, large acceptance measurements of upsilons, direct photons and fully reconstructed jets in p-p, p-A and A-A collisions at the Relativistic Heavy Ion Collider (RHIC. These detailed measurements will probe the Quark Gluon Plasma near its transition temperature, in a region of strongest coupling. The sPHENIX detector consists of hadronic and electromagnetic calorimetry, and charged particle tracking in conjunction with the recently acquired 1.5 tesla BaBar super-conducting solenoid. The sPHENIX acceptance of 2π in azimuth and |η| < 1.1 in pseudo-rapidity provides a factor of six improvement over the present PHENIX central spectrometer. Beyond being an excellent RHIC detector, sPHENIX provides an outstanding foundation for a detector focused on the physics of a possible future electron-ion collider at RHIC (eRHIC. In this talk we will discuss the physics potential of the sPHENIX detector, the design and technology choices for the sPHENIX calorimeters, and the conceptual design of a day-one detector for eRHIC.

  18. The future of PHENIX: upgrading to sPHENIX and beyond

    Directory of Open Access Journals (Sweden)

    Mannel E.J.

    2015-01-01

    Full Text Available sPHENIX is a major upgrade to the PHENIX detector enabling high-rate, large acceptance measurements of upsilons, direct photons and fully reconstructed jets in p-p, p-A and A-A collisions at the Relativistic Heavy Ion Collider (RHIC. These detailed measurements will probe the Quark Gluon Plasma near its transition temperature, in a region of strongest coupling. The sPHENIX detector consists of hadronic and electromagnetic calorimetry, and charged particle tracking in conjunction with the recently acquired 1.5 tesla BaBar super-conducting solenoid. The sPHENIX acceptance of 2π in azimuth and |η| < 1.1 in pseudo-rapidity provides a factor of six improvement over the present PHENIX central spectrometer. Beyond being an excellent RHIC detector, sPHENIX provides an outstanding foundation for a detector focused on the physics of a possible future electron-ion collider at RHIC (eRHIC. In this talk we will discuss the physics potential of the sPHENIX detector, the design and technology choices for the sPHENIX calorimeters, and the conceptual design of a day-one detector for eRHIC.

  19. An Upgrade Proposal from the PHENIX Collaboration

    CERN Document Server

    Adare, A; Aidala, C; Ajitanand, N N; Akiba, Y; Akimoto, R; Alexander, J; Aoki, K; Apadula, N; Asano, H; Atomssa, E T; Awes, T C; Azmoun, B; Babintsev, V; Bai, M; Bai, X; Bandara, N; Bannier, B; Barish, K N; Baron, O; Bassalleck, B; Bathe, S; Baublis, V; Baumgart, S; Bazilevsky, A; Beaumier, M; Beckman, S; Belmont, R; Benjamin, G; Berdnikov, A; Berdnikov, Y; Blackburn, J; Blau, D S; Bobrek, M; Bok, J; Boose, S; Boyle, K; Britton,, C L; Brooks, M L; Bryslawskyj, J; Bumazhnov, V; Butler, C; Butsyk, S; Campbell, S; Carollo, A; Chai, J -S; Chen, C -H; Chernichenko, S; Chi, C Y; Chiu, M; Choi, I J; Choi, J B; Choi, S; Chollet, S; Christiansen, P; Chujo, T; Cianciolo, V; Citron, Z; Cole, B A; Cronin, N; Crossett, N; Csanád, M; D'Orazio, L; Dairaku, S; Danley, D; Datta, A; Daugherity, M S; David, G; DeBlasio, K; Debraine, A; Dehmelt, K; Denisov, A; Deshpande, A; Desmond, E J; Dietzsch, O; Ding, L; Dion, A; Diss, P B; Do, J H; Donadelli, M; Drapier, O; Drees, A; Drees, K A; Durham, J M; Durum, A; Eberle, L; Efremenko, Y V; Engelmore, T; Enokizono, A; Esumi, S; Eyser, K O; Fadem, B; Feege, N; Fields, D E; Finger, M; FingerJr., M; Fleuret, F; Fokin, S L; Frantz, J E; Franz, A; Frawley, A D; Fukao, Y; Fusayasu, T; Gainey, K; Gal, C; Gallus, P; Garg, P; Garishvili, A; Garishvili, I; Gastaldi, F; Ge, H; Giannotti, P; Giordarno, F; Glenn, A; Gong, X; Gonin, M; Goto, Y; de Cassagnac, R Granier; Grau, N; Greene, S V; Perdekamp, M Grosse; Gu, Y; Gunji, T; Guragain, H; Hachiya, T; Haggerty, J S; Hahn, K I; Hamagaki, H; Hamilton, H F; Han, S Y; Hanks, J; Hasegawa, S; Haseler, T O S; Hashimoto, K; Hayano, R; Hayashi, S; He, X; Hemmick, T K; Hester, T; Hill, J C; Hoefferkamp, M; Hollis, R S; Homma, K; Hong, B; Hori, Y; Hoshino, T; Huang, J; Huang, S; Hutchins, J R; Ichihara, T; Ikeda, Y; Imai, K; Imazu, Y; Imrek, J; Inaba, M; Iordanova, A; Isenhower, D; Isinhue, A; Isupov, A; Ivanischev, D; Ivanov, V; Jacak, B V; Jeon, S J; Jezghani, M; Jia, J; Jiang, X; Johnson, B M; Joo, K S; Jouan, D; Jumper, D S; Kamin, J; Kanda, S; Kang, B H; Kang, J H; Kang, J S; Kapustinsky, J; Karatsu, K; Kawall, D; Kazantsev, A V; Kehayias, H -J; Key, J A; Khachatryan, V; Khandai, P K; Khanzadeev, A; Kijima, K M; Kim, C; Kim, D H; Kim, D J; Kim, E -J; Kim, H J; Kim, K -B; Kim, M; Kim, Y -J; Kim, Y K; Kimelman, B; Kiss, Á; Kistenev, E; Kitamura, R; Klatsky, J; Kleinjan, D; Kline, P; Koblesky, T; Kochenda, L; Kofarago, M; Komatsu, Y; Komkov, B; Koster, J; Kotchetkov, D; Kotov, D; Kravtsov, P; Krizek, F; Kurita, K; Kuriyama, M; Kurosawa, M; Kwon, Y; Lacey, R; Lai, Y S; Lajoie, J G; Lebedev, A; Lee, G H; Lee, J; Lee, K B; Lee, K S; Lee, S; Lee, S H; Lefferts, R; Leitch, M J; Leite, M A L; Leitgab, M; Lewis, B; Li, X; Lim, S H; Lipski, A; Litvinenko, A; Liu, M X; Love, B; Lynch, D; Lynch, M; Maguire, C F; Makdisi, Y I; Makek, M; Malakhov, A; Manion, A; Manko, V I; Mannel, E; Maruyama, T; Masumoto, S; McCumber, M; McGaughey, P L; McGlinchey, D; McKay, R; McKinney, C; Meles, A; Mendoza, M; Menegasso, R; Meredith, B; Miake, Y; Mibe, T; Mignerey, A C; Milov, A; Mishra, D K; Mitchell, J T; Miyasaka, S; Mizuno, S; Mohanty, A K; Montuenga, P; Moon, T; Morrison, D P; Moskowitz, M; Motschwiller, S; Moukhanova, T V; Murakami, T; Murata, J; Mwai, A; Nagae, T; Nagamiya, S; Nagashima, K; Nagle, J L; Nagy, M I; Nakagawa, I; Nakagomi, H; Nakamiya, Y; Nakamura, K R; Nakamura, T; Nakano, K; Nattrass, C; Nederlof, A; Netrakanti, P K; Nihashi, M; Niida, T; Ninomiya, K; Nishimura, S; Northacker, D; Nouicer, R; Novak, T; Novitzky, N; Nukariya, A; Nyanin, A S; O'Brien, E; Ogilvie, C A; Oide, H; Okada, K; Koop, J D Orjuela; Osborn, J D; Oskarsson, A; Österman, L; Ozawa, K; Pancake, C; Pantuev, V; Papavassiliou, V; Park, I H; Park, J S; Park, S; Park, S K; Pate, S F; Patel, L; Patel, M; Peng, J -C; Perepelitsa, D; Perera, G D N; Peresedov, V; Peressounko, D Yu; Perry, J; Petti, R; Pinkenburg, C; Pinson, R; Pisani, R P; Popule, J; Purschke, M L; Qu, H; Radhakrishnan, S; Rak, J; Ramson, B J; Ravinovich, I; Read, K F; Reynolds, D; Reynolds, R; Riabov, V; Riabov, Y; Richardson, E; Rinn, T; Riveli, N; Roach, D; Rolnick, S D; Rosati, M; Roschin, E; Rowan, Z; Rubin, J G; Rukoyatkin, P; Ryu, M S; Safonov, A; Sahlmueller, B; Saito, N; Sakaguchi, T; Sako, H; Samsonov, V; Sano, M; Sarsour, M; Sato, S; Sawada, S; Schaefer, B; Schmoll, B K; Sedgwick, K; Seele, J; Seidl, R; Sekiguchi, Y; Sen, A; Seto, R; Sett, P; Sexton, A; Shafto, E; Sharma, D; Shaver, A; Shein, I; Shibata, T -A; Shigaki, K; Shimomura, M; Shoji, K; Shukla, P; Sicho, P; Sickles, A; Silva, C L; Silvermyr, D; Singh, B K; Singh, C P; Singh, V; Sippach, F W; Skolnik, M; Snowball, M; Solano, S; Soldatov, A; Soltz, R A; Sondheim, W E; Sorensen, S P; Soumya, M; Sourikova, I V; Stankus, P W; Steinberg, P; Stenlund, E; Stepanov, M; Ster, A; Stevens, L; Stoll, S P; Stone, M R; Sugitate, T; Sukhanov, A; Sumita, T; Sun, J; Sziklai, J; Takagui, E M

    2015-01-01

    In this document the PHENIX collaboration proposes a major upgrade to the PHENIX detector at the Relativistic Heavy Ion Collider. This upgrade, sPHENIX, enables an extremely rich jet and beauty quarkonia physics program addressing fundamental questions about the nature of the strongly coupled quark-gluon plasma (QGP), discovered experimentally at RHIC to be a perfect fluid. The startling dynamics of the QGP on fluid-like length scales is an emergent property of quantum chromodynamics (QCD), seemingly implicit in the Lagrangian but stubbornly hidden from view. QCD is an asymptotically free theory, but how QCD manifests as a strongly coupled fluid with specific shear viscosity near $T_C$, as low as allowed by the uncertainty principle, is as fundamental an issue as that of how confinement itself arises.

  20. G2 - G3 inventive properties, the first french nuclear plants; Caracteristiques generales et aspects originaux des reacteurs G2 et G3

    Energy Technology Data Exchange (ETDEWEB)

    Pascal; Horowitz; Bussac; Joatton; De Lagge de Meux; Martin [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1958-07-01

    This paper points out the inventive properties of the frenchctors G2 and G3. These are dual purpose reactors, i.e. designed for the production of both plutonium and energy (30 electrical MW); in this respect, they can be considered as the start point of the french electrical energy produced from nuclear fuel. The following points are specially discussed in this paper: the choice of the prestressed concrete pressure vessel, the horizontal arrangement of the channels, the interest of neutron flux flattening, the advantages of the charging and discharging device working during pile operation. (author)Fren. [French] Les caracteres originaux des reacteurs fran is G2 et G3 sont decrits dans ce rapport. Ce sont des reacteurs a double fin, plutonigenes et aussi producteurs d'energie (30 MW electriques); ils constituent a ce titre le point de depart de la production fran ise d'electricite d'origine nucleaire. Sont discutes, en particulier, dans ce rapport: le choix du caisson en beton precontraint pour tenir la pression, la disposition horizontale des canaux, l'interet de l'aplatissement du flux neutronique, les avantages de l'appareil permettant le chargement et le dechargement du combustible sans arreter la pile. (auteur)

  1. First results from RHIC-PHENIX

    CERN Document Server

    Ghosh, T K; Adler, S S; Ajitanand, N N; Akiba, Y; Alexander, J; Aphecetche, L; Arai, Y; Aronson, S H; Averbeck, R; Awes, T C; Barish, K N; Barnes, P D; Barrette, J; Bassalleck, B; Bathe, S; Baublis, V; Bazilevsky, A; Belikov, S V; Bellaiche, F G; Belyaev, S T; Bennett, M J; Berdnikov, Yu A; Botelho, S S; Brooks, M L; Brown, D S; Bruner, N L; Bucher, D; Büsching, H; Bunce, G M; Burward-Hoy, J M; Butsyk, S; Carey, T A; Chand, P; Chang, J; Chang, W C; Chavez, L L; Chernichenko, S K; Chi, C Y; Chiba, J; Chiu, M; Choudhury, R K; Christ, T; Chujo, T; Chung, M S; Chung, P; Cianciolo, V; Cole, B A; D'Enterria, D G; Dávid, G; Delagrange, H; Denisov, A; Deshpande, A A; Desmond, E J; Dietzsch, O; Dinesh, B V; Drees, A; Durum, A A; Dutta, D; Ebisu, K; Efremenko, Yu V; Chenawi, K E; En-Yo, H; Esumi, S C; Ewell, L A; Ferdousi, T; Fields, D E; Fokin, S L; Fraenkel, Zeev; Franz, A; Frawley, A D; Fung, S Y; Garpman, S; Ghosh, T K; Glenn, A; Godoi, A L; Goto, Y; Greene, S V; Grosse-Perdekamp, M; Gupta, S K; Guryn, W; Gustafsson, Hans Åke; Haggerty, J S; Hamagaki, H; Hansen, A G; Hara, H; Hartouni, E P; Havano, R; Hayashi, N; He, X; Hemmick, T K; Heuser, J M; Hill, J C; Ho, D S; Homma, K; Hong, B; Hoover, A; Ichihara, T; Imai, K; Ippolitov, M S; Ishihara, M; Jacak, B V; Jang, W Y; Jia, J; Johnson, B M; Johnson, S C; Joo, K S; Kametani, S; Kang, J H; Kann, M; Kapoor, S S; Kelly, S; Khachaturov, B A; Khanzadeev, A V; Kikuchi, J; Kim, D J; Kim, H J; Kim, S Y; Kim, Y G; Kinnison, W W; Kistenev, E P; Kiyomichi, A; Klein-Bösing, C; Klinksiek, S A; Kochenda, L M; Kochetkov, D; Kochetkov, V; Köhler, D; Kohama, T; Kozlov, A; Kroon, P J; Kurita, K; Kweon, M J; Kwon, Y; Kyle, G S; Lacey, R A; Lajoie, J G; Lauret, J; Lebedev, A; Lee, D M; Leitch, M J; Li, X H; Li, Z; Lim, D J; Liu, M X; Liu, X; Liu, Z; Maguire, C F; Mahon, J; Makdisi, Y I; Man'ko, V I; Mao, Y; Mark, S K; Markacs, S; Martínez, G; Marx, M D; Massaike, A; Matathias, F; Matsumoto, T; McGaughey, P L; Melnikov, E A; Merschmeyer, M; Messer, F; Messer, M; Miake, Y; Miller, T E; Milov, A; Mioduszewski, S; Mischke, R E; Mishra, G C; Mitchell, J T; Mohanty, A K; Morrison, D P; Moss, J M; Muhlbacher, F; Muniruzzaman, M; Murata, J; Nagamiya, S; Nagasaka, Y; Nagle, J L; Nakada, Y; Nandi, B K; Newby, J; Nikkinen, L; Nilsson, P O; Nishimura, S; Nyanin, A S; Nystrand, J; O'Brien, E; Ogilvie, C A; Ohnishi, H; Ojha, I D; Ono, M; Onuchin, V A; Oskarsson, A; Österman, L; Otterlund, I; Oyama, K; Paffrath, L; Palounek, A P T; Pantuev, V S; Papavassiliou, V; Pate, S F; Peitzmann, Thomas; Petridis, A N; Pinkenburg, C H; Pisani, R P; Pitukhin, P; Plasil, F; Pollack, M E; Pope, K; Purschke, M L; Ravinovich, I; Read, K F; Reygers, K; Riabov, V; Riabov, Y; Rosati, M; Rose, A A; Ryu, S S; Saitô, N; Sakaguchi, A; Sakaguchi, T; Sako, H; Sakuma, T; Samsonov, V; Sangster, T C; Santo, R; Sato, H D; Sato, S; Sawada, S; Schlei, B R; Schutz, Y; Semenov, V; Seto, R; Shea, T K; Shein, I; Shibata, T A; Shigaki, K; Shiina, T; Shin, Y H; Sibiryak, Yu; Silvermyr, D; Sim, K S; Simon-Gillo, J; Singh, C P; Singh, V; Sivertz, M; Soldatov, A; Soltz, R A; Sørensen, S; Stankus, P W; Starinsky, N; Steinberg, P; Stenlund, E; Ster, A; Stoll, S P; Sugioka, M; Sugitate, T; Sullivan, J P; Sumi, Y; Sun, Z; Suzuki, M; Takagui, E M; Taketani, A; Tamai, M; Tanaka, Y; Taniguchi, E; Tannenbaum, M J; Thomas, J; Thomas, J H; Thomas, T L; Tian, W; Tojo, J; Torii, H A; Towell, R S; Tserruya, Itzhak; Tsuruoke, H; Tsvetkov, A A; Tuli, S K; Tydesjo, H; Tyurin, N; Ushiroda, T; van Hecke, H; Velissaris, C; Velkovska, J; Velkovsky, M; Vingradov, A A; Volkov, M A; Vorobyov, A A; Vznuzdaev, E A; Wang, H; Watanabe, Y; White, S N; Witzig, C; Wohn, F K; Woody, C L; Xie, W; Yagi, K; Yokkaichi, S; Young, G R; Yushmanov, I E; Zajc, W A; Zhang, Z; Zhou, S

    2001-01-01

    The PHENIX experiment consists of a large detector system located at the newly commissioned Relativistic Heavy Ion Collider (RHIC) at the Brookhaven National Laboratory. The primary goal of the PHENIX experiment is to look for signatures of the QCD prediction of a deconfined high-energy-density phase of nuclear matter and the quark gluon plasma. PHENIX started taking data for Au+Au collisions at square root (s/sub NN/)=130 GeV in June 2000. The signals from the beam-beam counter (BBC) and zero degree calorimeter (ZDC) are used to determine the centrality of the collision. A Glauber model reproduces the ZDC spectrum reasonably well to determine the participants in a collision. The charged particle multiplicity distribution from the first PHENIX paper is compared with the other RHIC experiment and the CERN and SPS results. Transverse momentum of photons are measured in the electro-magnetic calorimeter (EMCal) and preliminary results an presented. Particle identification is made by a time-of-flight (TOF) detecto...

  2. First results from RHIC-PHENIX

    Indian Academy of Sciences (India)

    Tarun Kanti Ghosh; K Adcox; S S Adler; N Ajitanand; Y Akiba; J Alexander; L Aphecetche; Y Arai; S H Aronson; R Averbeck; T C Awes; K N Barish; P D Barnes; J Barrette; B Bassalleck; S Bathe; V Baublis; A Bazilevsky; S Belikov; F G Bellaiche; S T Belyaev; M J Bennett; Y Berdnikov; S Botelho; M L Brooks; D S Brown; N Bruner; D Bucher; H Buesching; V Bumazhnov; G Bunce; J Burward-Hoy; S Butsyk; T A Carey; P Chand; J Chang; W C Chang; L L Chavez; S Chernichenko; C Y Chi; J Chiba; M Chiu; R K Choudhury; T Christ; T Chujo; M S Chung; P Chung; V Cianciolo; B A Cole; D G D’Enterria; G David; H Delagrange; A Denisov; A Deshpande; E J Desmond; O Dietzsch; B V Dinesh; A Drees; A Durum; D Dutta; K Ebisu; Y V Efremenko; K El Chenawi; H En’yo; S Esumi; L Ewell; T Ferdousi; D E Fields; S L Fokin; Z Fraenkel; A Franz; A D Frawley; S-Y Fung; S Garpman; T K Ghosh; A Glenn; A L Godoi; Y Goto; S V Greene; M Grosse Perdekamp; S K Gupta; W Guryn; H-Å Gustafsson; J S Haggerty; H Hamagaki; A G Hansen; H Hara; E P Hartouni; R Hayano; N Hayashi; X He; T K Hemmick; J Heuser; J C Hill; D S Ho; K Homma; B Hong; A Hoover; T Ichihara; K Imai; M S Ippolitov; M Ishihara; B V Jacak; W Y Jang; J Jia; B M Johnson; S C Johnson; K S Joo; S Kametani; J H Kang; M Kann; S S Kapoor; S Kelly; B Khachaturov; A Khanzadeev; J Kikuchi; D J Kim; H J Kim; S Y Kim; Y G Kim; W W Kinnison; E Kistenev; A Kiyomichi; C Klein-Boesing; S Klinksiek; L Kochenda; D Kochetkov; V Kochetkov; D Koehler; T Kohama; A Kozlov; P J Kroon; K Kurita; M J Kweon; Y Kwon; G S Kyle; R Lacey; J G Lajoie; J Lauret; A Lebedev; D M Lee; M J Leitch; X H Li; Z Li; D J Lim; M X Liu; X Liu; Z Liu; C F Maguire; J Mahon; Y I Makdisi; V I Manko; Y Mao; S K Mark; S Markacs; G Martinez; M D Marx; A Masaike; F Matathias; T Matsumoto; P L McGaughey; E Melnikov; M Merschmeier; F Messer; M Messer; Y Miake; T E Miller; A Milov; S Mioduszewski; R E Mischke; G C Mishra; J T Mitchell; A K Mohanty; D P Morrison; J M Moss; F Mühlbacher; M Muniruzzaman; J Murata; S Nagamiya; Y Nagasaka; J L Nagle; Y Nakada; B K Nandi; J Newby; L Nikkinen; P Nilsson; S Nishimura; A S Nyanin; J Nystrand; E O’Brien; C A Ogilvie; H Ohnishi; I D Ojha; M Ono; V Onuchin; A Oskarsson; L Österman; I Otterlund; K Oyama; L Paffrath; A P T Palounek; V S Pantuev; V Papavassiliou; S F Pate; T Peitzmann; A N Petridis; C Pinkenburg; R P Pisani; P Pitukhin; F Plasil; M Pollack; K Pope; M L Purschke; I Ravinovich; K F Read; K Reygers; V Riabov; Y Riabov; M Rosati; A A Rose; S S Ryu; N Saito; A Sakaguchi; T Sakaguchi; H Sako; T Sakuma; V Samsonov; T C Sangster; R Santo; H D Sato; S Sato; S Sawada; B R Schlei; Y Schutz; V Semenov; R Seto; T K Shea; I Shein; T-A Shibata; K Shigaki; T Shiina; Y H Shin; I G Sibiriak; D Silvermyr; K S Sim; J Simon-Gillo; C P Singh; V Singh; M Sivertz; A Soldatov; R A Soltz; S Sorensen; P W Stankus; N Starinsky; P Steinberg; E Stenlund; A Ster; S P Stoll; M Sugioka; T Sugitate; J P Sullivan; Y Sumi; Z Sun; M Suzuki; E M Takagui; A Taketani; M Tamai; K H Tanaka; Y Tanaka; E Taniguchi; M J Tannenbaum; J Thomas; J H Thomas; T L Thomas; W Tian; J Tojo; H Torii; R S Towell; I Tserruya; H Tsuruoka; A A Tsvetkov; S K Tuli; H Tydesjö; N Tyurin; T Ushiroda; H W van Hecke; C Velissaris; J Velkovska; M Velkovsky; A A Vinogradov; M A Volkov; A Vorobyov; E Vznuzdaev; H Wang; Y Watanabe; S N White; C Witzig; F K Wohn; C L Woody; W Xie; K Yagi; S Yokkaichi; G R Young; I E Yushmanov; W A Zajc; Z Zhang; S Zhou

    2001-08-01

    The PHENIX experiment consists of a large detector system located at the newly commissioned relativistic heavy ion collider (RHIC) at the Brookhaven National Laboratory. The primary goal of the PHENIX experiment is to look for signatures of the QCD prediction of a deconfined high-energy-density phase of nuclear matter quark gluon plasma. PHENIX started data taking for Au+Au collisions at $\\sqrt{s_{NN}} = 130$ GeV in June 2000. The signals from the beam-beam counter (BBC) and zero degree calorimeter (ZDC) are used to determine the centrality of the collision. A Glauber model reproduces the ZDC spectrum reasonably well to determine the participants in a collision. Charged particle multiplicity distribution from the first PHENIX paper is compared with the other RHIC experiment and the CERN, SPS results. Transverse momentum of photons are measured in the electro-magnetic calorimeter (EMCal) and preliminary results are presented. Particle identification is made by a time of flight (TOF) detector and the results show clear separation of the charged hadrons from each other.

  3. Automated Structure Solution with the PHENIX Suite

    Energy Technology Data Exchange (ETDEWEB)

    Zwart, Peter H.; Zwart, Peter H.; Afonine, Pavel; Grosse-Kunstleve, Ralf W.; Hung, Li-Wei; Ioerger, Tom R.; McCoy, A.J.; McKee, Eric; Moriarty, Nigel; Read, Randy J.; Sacchettini, James C.; Sauter, Nicholas K.; Storoni, L.C.; Terwilliger, Tomas C.; Adams, Paul D.

    2008-06-09

    Significant time and effort are often required to solve and complete a macromolecular crystal structure. The development of automated computational methods for the analysis, solution and completion of crystallographic structures has the potential to produce minimally biased models in a short time without the need for manual intervention. The PHENIX software suite is a highly automated system for macromolecular structure determination that can rapidly arrive at an initial partial model of a structure without significant human intervention, given moderate resolution and good quality data. This achievement has been made possible by the development of new algorithms for structure determination, maximum-likelihood molecular replacement (PHASER), heavy-atom search (HySS), template and pattern-based automated model-building (RESOLVE, TEXTAL), automated macromolecular refinement (phenix.refine), and iterative model-building, density modification and refinement that can operate at moderate resolution (RESOLVE, AutoBuild). These algorithms are based on a highly integrated and comprehensive set of crystallographic libraries that have been built and made available to the community. The algorithms are tightly linked and made easily accessible to users through the PHENIX Wizards and the PHENIX GUI.

  4. Automated structure solution with the PHENIX suite

    Energy Technology Data Exchange (ETDEWEB)

    Terwilliger, Thomas C [Los Alamos National Laboratory; Zwart, Peter H [LBNL; Afonine, Pavel V [LBNL; Grosse - Kunstleve, Ralf W [LBNL

    2008-01-01

    Significant time and effort are often required to solve and complete a macromolecular crystal structure. The development of automated computational methods for the analysis, solution, and completion of crystallographic structures has the potential to produce minimally biased models in a short time without the need for manual intervention. The PHENIX software suite is a highly automated system for macromolecular structure determination that can rapidly arrive at an initial partial model of a structure without significant human intervention, given moderate resolution, and good quality data. This achievement has been made possible by the development of new algorithms for structure determination, maximum-likelihood molecular replacement (PHASER), heavy-atom search (HySS), template- and pattern-based automated model-building (RESOLVE, TEXTAL), automated macromolecular refinement (phenix. refine), and iterative model-building, density modification and refinement that can operate at moderate resolution (RESOLVE, AutoBuild). These algorithms are based on a highly integrated and comprehensive set of crystallographic libraries that have been built and made available to the community. The algorithms are tightly linked and made easily accessible to users through the PHENIX Wizards and the PHENIX GUI.

  5. China experimental fast reactor; Le reacteur rapide experimental chinois

    Energy Technology Data Exchange (ETDEWEB)

    Tianmin, X. [Institut d' Ingenierie Nucleaire de Pekin (China); Cunren, L. [Centre d' Etude de Surete de Pekin (China)

    2007-07-15

    The Chinese experimental fast reactor (CEFR) is a pool-type sodium-cooled fast reactor whose short term purposes are: -) the validation of computer codes, -) the check of the relevance of standards, and -) the gathering of experimental data on fast reactors. On the long term the expectations will focus on: -) gaining experience in fast reactor operations, -) the testing of nuclear fuels and materials, and -) the study of sodium compounds. The main technical features of CEFR are: -) thermal power output: 65 MW (electrical power output: 20 MW), -) size of the core: height: 45 cm, diameter: 60 cm, -) maximal linear output: 430 W/cm, -) neutron flux: 3.7*10{sup 15} n/cm{sup 2}/s, -) input/output sodium temperature: 360 / 530 Celsius degrees, -) 2 loops for the primary system and 2 loops for the secondary system. The temperature coefficient and the power coefficient are settled to stay negative for any change in the values of the core parameters. The installation of the reactor vessel will be completed by mid 2007. The first criticality of CEFR is expected during the first semester of 2010. (A.C.)

  6. The Flamanville 3 EPR reactor; Le reacteur EPR Flamanville 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    On April 10. 2007, the french government authorized EDF to create on the site of Flamanville ( La Manche) a nuclear base installation containing a pressurized water EPR type reactor. This nuclear reactor, conceived by AREVA NP and EDF, is the first copy of a generation susceptible to replace later, at least partly, the French nuclear reactors at present in operation.Within the framework of its mission of technical support of the Authority of Nuclear Safety ( A.S.N.), the I.R.S.N. widely contributed successively: to define the general objectives of safety assigned to this new generation of pressurized water nuclear reactors; to analyze the options of safety proposed by EDF for the EPR project; To deepen, upstream to the authorization of creation, the evaluation of the step of safety and the measures of conception retained by EDF that have to allow to respect the objectives of safety which were notified to it. (N.C.)

  7. PHENIX Spinfest School 2009 at BNL

    Energy Technology Data Exchange (ETDEWEB)

    Foster,S.P.; Foster,S.; Seidl, R.; Goto, Y.; Okada, K.

    2009-08-07

    Since 2005, the PHENIX Spin Physics Working Group has set aside several weeks each summer for the purposes of training and integrating recent members of the working group as well as coordinating and making rapid progress on support tasks and data analysis. One week is dedicated to more formal didactic lectures by outside speakers. The location has so far alternated between BNL and the RIKEN campus in Wako, Japan, with support provided by RBRC and LANL.

  8. Storage of plugs and experimental devices from reactors; Stockage des bouchons et dispositifs experimentaux en provenance des reacteurs (1961)

    Energy Technology Data Exchange (ETDEWEB)

    Cerre, P.; Mestre, E. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1961-07-01

    - Within the general programme of storage and treatment of radioactive waste produced by the various operations carried out in an atomic center, it is useful to consider separately the problem of certain waste from reactors, which, because of its size and physical nature, has to be stored with a view to being later treated and finally evacuated. The solution which we propose for this storage problem is presented in this paper. (authors) [French] - Dans le cadre du stockage et du conditionnement des dechets radioactifs provenant des diverses manipulations effectuees dans un centre atomique, il y a lieu de considerer a part certains dechets des reacteurs qui, par leur dimension et leur nature physique doivent etre stockes en vue de leur reprise ulterieure pour un conditionnement et une evacuation definitifs. La solution que nous avons apportee a ce stockage fait l'objet de l'expose qui suit. (auteurs)

  9. The PHENIX Forward Silicon Vertex Detector

    CERN Document Server

    Aidala, C; Anderssen, LE; Bambaugh, A; Barron, A; Boissevain, J G; Bok, J; Boose, S; Brooks, M L; Butsyk, S; Cepeda, LM; Chacon, P; Chacon, S; Chavez, L; Cote, T; D'Agostino, C; Datta, A; DeBlasio, K; DelMonte, L; Desmond, E J; Durham, J M; Fields, D; Finger, M; Gingu, C; Gonzales, B; Haggerty, J S; Hawke, T; van Hecke, H W; Herron, M; Hoff, J; Huang, J; Jiang, X; Johnson, LT; Jonas, M; Kapustinsky, J; Key, A; Kunde, G J; LaBounty, J; Lee, D M; Lee, K B; Leitch, M J; Lenz, M; Lenz, W; Liu, M X; Lynch, D; Mannel, E; McGaughey, P L; Meles, A; Meredith, B; Nguyen, H; O'Brien, E; Pak, R; Papavassiliou, V; Pate, S; Pereira, H; Perera, G D N; Phillips, M; Pisani, R; Polizzo, S; Poncione, R J; Popule, J; Prokop, M; Purschke, M L; Purwar, A K; Ronzhina, N; Silva, C L; Slunecka, M; Smith, R; Sondheim, W E; Spendier, K; Stoffer, M; Tennant, E; Thomas, D; Tomasek, M; Veicht, A; Vrba, V; Wang, X R; Wei, F; Winter, D; Yarema, R; You, Z; Zimmerman, A; Zimmerman, T

    2013-01-01

    A new silicon detector has been developed to provide the PHENIX experiment with precise charged particle tracking at forward and backward rapidity. The Forward Silicon Vertex Tracker (FVTX) was installed in PHENIX prior to the 2012 run period of the Relativistic Heavy Ion Collider (RHIC). The FVTX is composed of two annular endcaps, each with four stations of silicon mini-strip sensors, covering a rapidity range of $1.2<|\\eta|<2.2$ that closely matches the two existing PHENIX muon arms. Each station consists of 48 individual silicon sensors, each of which contains two columns of mini-strips with 75 $\\mu$m pitch in the radial direction and lengths in the $\\phi$ direction varying from 3.4 mm at the inner radius to 11.5 mm at the outer radius. The FVTX has approximately 0.54 million strips in each endcap. These are read out with FPHX chips, developed in collaboration with Fermilab, which are wire bonded directly to the mini-strips. The maximum strip occupancy reached in central Au-Au collisions is approxim...

  10. PHENIX Low Momentum Direct Photon Analysis

    Science.gov (United States)

    Fan, Wenqing; Phenix Collaboration

    2016-09-01

    The PHENIX experiment operates with one of the major detectors at the RHIC collider. One of the major goals of PHENIX is to identify and study Quark Gluon Plasma (QGP). Direct photons turn out to be an excellent probe due to their small interaction cross section with the collision produced medium hence carrying information of its properties from the space-time production points. In the PHENIX direct photon measurement, a large excess of low-pT photons in Au+Au collisions at 200 GeV is discovered compared to reference p+p collisions, which has been interpreted as thermal radiation from the QGP and hadron-gas (HG) medium. At the same time the excess photons have a large azimuthal anisotropy, expressed as Fourier coefficients v2 and v3. Measurements at a lower collision energy may provide new insight on the origin of the low-pT direct photons. In the experiment the current effort is to reduce the experimental uncertainties in Au+Au and p+p collisions via the photons' external conversion to di-electron pairs, and measure the direct photon yield in Cu+Au and p+Au collisions at 200 GeV as well as the yield in Au+Au collisions at lower 39 GeV and 62.4 GeV. We will present the improvements and the status of the ongoing analyses.

  11. RNA Structure Refinement using the ERRASER-Phenix pipeline

    Science.gov (United States)

    Chou, Fang-Chieh; Echols, Nathaniel; Terwilliger, Thomas C.; Das, Rhiju

    2015-01-01

    Summary The final step of RNA crystallography involves the fitting of coordinates into electron density maps. The large number of backbone atoms in RNA presents a difficult and tedious challenge, particularly when experimental density is poor. The ERRASER-Phenix pipeline can improve an initial set of RNA coordinates automatically based on a physically realistic model of atomic-level RNA interactions. The pipeline couples diffraction-based refinement in Phenix with the Rosetta-based real-space refinement protocol ERRASER (Enumerative Real-Space Refinement ASsisted by Electron density under Rosetta). The combination of ERRASER and Phenix can improve the geometrical quality of RNA crystallographic models while maintaining or improving the fit to the diffraction data (as measured by Rfree). Here we present a complete tutorial for running ERRASER-Phenix through the Phenix GUI, from the command-line, and via an application in the Rosetta On-line Server that Includes Everyone (ROSIE). PMID:26227049

  12. Determination of local boiling in light water reactors by correlation of the neutron noise; Determination de l'ebullition locale dans les reacteurs a eau legere par correlation du bruit neutronique

    Energy Technology Data Exchange (ETDEWEB)

    Zwingelstein, G. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1968-07-01

    The power limit of swimming-pool type reactors depends on the phenomenon of the appearance of burn-out. In order to determine this limit we have attempted to detect the local boiling which usually occurs before the burn out. Local boiling has been simulated by an electrically heated plate placed in the core of the reactor Siloette. The study of local boiling, which is based on the properties of the correlation functions for the neutron noise of detectors placed in the core, shows that a privileged frequency occurs in the power spectrum of the noise. It is intended in the future to determine the influence of various parameters on this characteristic frequency. (author) [French] La limitation de la puissance des reacteurs nucleaires de type piscine est due au phenomene d'apparition de 'burn out'. Pour determiner cette limitation, nous nous sommes proposes dans ce rapport de detecter l'ebullition locale qui apparait generalement avant le 'burn out'. L'ebullition locale a ete simulee par une plaque chauffee electriquement et placee dans le coeur du reacteur SILOETTE. L'etude de l'ebullition locale, qui est basee sur les proprietes des fonctions de correlation du bruit neutronique de detecteurs places clans le coeur, fait apparaitre une frequence privilegiee dans le spectre de puissance du bruit. On envisage dans l'avenir, de determiner l'influence des divers parametres sur cette frequence caracteristique. (auteur)

  13. Forward Transverse Single Spin Asymmetries at PHENIX

    Energy Technology Data Exchange (ETDEWEB)

    Vossen, Anselm, E-mail: avossen@indiana.edu [Indiana University, CEEM, 2401 Milo B. Sampson Lane, Bloomington, IN 47408 (United States)

    2011-09-16

    Recent measurements of single transverse spin asymmetries in proton-proton collisions measured by the PHENIX experiment at RHIC are presented. The focus is on the single particle left-right asymmetry A{sub N} for {pi}{sup 0} at {radical}s = 200 GeV and {radical}s = 62.4 GeV and the measurement of di-hadron correlations at {radical}s = 200 GeV which are produced by the fragmentation of a transversely polarized quark via the Interference Fragmentation Function (IFF) H{sub 1}{sup <} and thus provide a probe for the quark transversity distribution function.

  14. d + Au hadron correlation measurements at PHENIX

    Energy Technology Data Exchange (ETDEWEB)

    Sickles, Anne M., E-mail: anne@bnl.gov

    2014-06-15

    In these proceedings, we discuss recent results from d + Au collisions in PHENIX ridge related measurements and their possible hydrodynamic origin. We present the v{sub 2} at midrapidity and measurements of the pseudorapidity dependence of the ridge, distinguishing between the d-going and Au-going directions. We investigate the possible geometrical origin by comparing v{sub 2} in d + Au to that in p + Pb, Au + Au and Pb + Pb collisions. Future plans to clarify the role of geometry in small collision systems at RHIC are discussed.

  15. Upsilon Measurements by the PHENIX Collaboration

    CERN Document Server

    Whitaker, Shawn

    2012-01-01

    PHENIX has measured $\\Upsilon$ production in p+p, d+Au and Au+Au collisions at $\\sqrt{s_{NN}}$=200 GeV. A baseline cross-section measurement has been made in p+p collisions and has been shown to be in good agreement with world trends. Preliminary studies of d+Au collisions found no suppression in the backward direction, but suppression was observed in the forward direction indicating the presence of cold nuclear matter effects. In Au+Au collisions preliminary studies of $\\Upsilon$ production at mid-rapidity found hints of suppression and has been shown to be in good agreement with global trends.

  16. Systematics of Identified Hadron Spectra at PHENIX

    CERN Document Server

    Csanad, M

    2006-01-01

    Mid-rapidity transverse momentum distributions for $\\pi^\\pm$, $K^\\pm$, p and $\\pbar$ are measured by the PHENIX experiment at RHIC in Au+Au, d+Au and p+p collisions at \\ssnn=200GeV up to ~2--4GeV. Also particle ratios of $\\pi^{-}/\\pi^{+}$, $K^{-}/K^{+}$, $\\pbar/p$, $p/\\pi$ and $\\pbar/\\pi$ are measured, as well as the nuclear modification factor, all as a function of \\pt and in every of the above collision systems. Finally, the measured p+p and Au+Au spectra are compared to the Buda-Lund hydro model.

  17. Recent quarkonia results from the PHENIX experiment

    CERN Document Server

    del Valle, Zaida Conesa

    2009-01-01

    The PHENIX collaboration efforts towards constraining and understanding quarkonia production mechanisms are outlined. J/psi measurements and feed-down sources studies in p-p collisions at 200 GeV together with their possible indications on the hadro-production mechanisms are discussed. The input from J/psi photo-production in ultra-peripheral collisions at 200 GeV is also examined. In addition, a glimpse of the first bottomonia results in minimum bias Au-Au collisions at 200 GeV and their implications are presented.

  18. The FUTURIX - transmutation experiment in Phenix

    Energy Technology Data Exchange (ETDEWEB)

    Warin, D.; Sudreau, F.; Pillon, S.; Drin, N.; Donnet, L.; Brunon, E

    2004-07-01

    In support to the European and American strategies of long-live radioactive waste transmutation in GEN IV critical fast neutron reactors or ADS, an irradiation test of fuels with high contents of transuranium elements is being designed and will be irradiated during the two last cycles of the Phenix fast reactor. This experiment will provide the main data concerning the behaviour under irradiation in representative conditions of different innovative fuels (oxides, nitrides, metal alloys, cermets) and will allow qualification and validation of models developed to predict their performance. (authors)

  19. Safety report concerning the reactor Pegase - volume 1 - Description of the installation - volume 2 - Safety of the installations; Rapport de surete du reacteur pegase - tome 1 - Description des installations - tome 2 - Surete des installations

    Energy Technology Data Exchange (ETDEWEB)

    Lacour, J. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires; Legoin, P. [S.E.M. Hispano-Suiza, 92 - Colombes (France)

    1964-07-01

    In the first volume: This report is a description of the reactor Pegase, given with a view to examine the safety of the installations. The Cadarache site at which they are situated is briefly described, in particular because of the consequences on the techniques employed for building Pegase. A description is also given of the original aspects of the reactor. The independent loops which are designed for full-scale testing of fuel elements used in natural uranium-gas-graphite reactor systems are described in this report, together with their operational and control equipment. In the second volume: In the present report are examined the accidents which could cause damage to the Pegase reactor installation. Among possible causes of accidents considered are the seismicity of the region, an excessive power excursion of the reactor and a fracture in the sealing of an independent loop. Although all possible precautions have been taken to offset the effects of such accidents, their ultimate consequences are considered here. The importance is stressed of the security action and regulations which, added to the precautions taken for the construction, ensure the safety of the installations. (authors) [French] Dans le volume 1: Ce rapport est une description du reacteur Pegase, afin d'examiner la surete des installations. Le site de CADARACHE ou elles sont situees, a ete sommairement decrit, en particulier, a cause des consequences sur les techniques mises en oeuvre pour la realisation de Pegase. Nous nous sommes egalement attache a decrire les aspects originaux du reacteur. Les boucles autonomes destinees a tester en vraie grandeur des elements combustibles de la filiere uranium naturel graphite-gaz, ainsi que leurs dispositifs de controle et d'exploitation, figurent egalement dans ce rapport. Dans le volume 2: Dans le present rapport, nous examinons des accidents pouvant endommager des installations du reacteur Pegase. Les origines d'accidents examines

  20. Transverse Spin Experiments with the PHENIX Detector at RHIC

    Science.gov (United States)

    Makdisi, Yousef

    2009-03-01

    The PHENIX experiment took data with transversely polarized proton beams from RUN1 in 2001 through RUN8 in 2008 and measured several transverse single spin asymmetries in various reactions in two kinematic regions; mid rapidity, near XF˜0 in inclusive neutral pion and charged hadron production at transverse momenta up to 5 GeV/c with results consistent with zero, and the forward rapidity, where large asymmetries were observed in inclusive neutral pion production similar to those previously seen by the STAR and BRAHMS detectors. Also presented are the unique PHENIX results on asymmetries in inclusive open charm and charmonium production along with PHENIX upgrades and future plans.

  1. sPHENIX Calorimeter Design and Jet Performance

    Science.gov (United States)

    Haggerty, John S.

    2016-12-01

    The PHENIX collaboration is planning a detector upgrade, sPHENIX, which consists of large acceptance calorimetry and tracking detectors built around the superconducting solenoid recently shipped to Brookhaven from the decommissioned BaBar experiment at SLAC. The sPHENIX calorimeter system includes three radial layers of sampling calorimeters, a tungsten-scintillating fiber electromagnetic calorimeter, and two longitudinally segmented sampling hadron calorimeters that are made of scintillator tiles and steel plates. Together, they provide hermetic coverage in | η | < 1 for calorimetry based jet measurements as well as minimal bias jet trigger capability, which coupled with high resolution tracking, enable an extremely rich jet physics program at RHIC.

  2. sPHENIX Calorimeter Design and Jet Performance

    Energy Technology Data Exchange (ETDEWEB)

    Haggerty J. S.

    2016-09-27

    The PHENIX collaboration is planning a detector upgrade, sPHENIX, which consists of large acceptance calorimetry and tracking detectors built around the superconducting solenoid recently shipped to Brookhaven from the decommissioned BaBar experiment at SLAC. The sPHENIX calorimeter system includes three radial layers of samplingcalorimeters, a tungsten-scintillating fiber electromagnetic calorimeter, and two longitudinally segmented samplinghadron calorimeters that are made of scintillator tiles and steel plates. Together, they provide hermetic coverage in n < 1 for calorimetry based jet measurements as well as minimal bias jet trigger capability, which coupled with high resolution tracking, enable an extremely rich jet physics program at RHIC.

  3. PHENIX WBS notes. Cost and schedule review copy

    Energy Technology Data Exchange (ETDEWEB)

    1994-02-01

    The Work Breakdown Structure (WBS) Book begins with this Overview section, which contains the high-level summary cost estimate, the cost profile, and the global construction schedule. The summary cost estimate shows the total US cost and the cost in terms of PHENIX construction funds for building the PHENIX detector. All costs in the WBS book are shown in FY 1993 dollars. Also shown are the institutional and foreign contributions, the level of pre-operations funding, and the cost of deferred items. Pie charts are presented at PHENIX WBS level 1 and 2 that show this information. The PHENIX construction funds are shown broken down to PHENIX WBS level 3 items per fiscal year, and the resulting profile is compared to the RHIC target profile. An accumulated difference of the two profiles is also shown. The PHENIX global construction schedule is presented at the end of the Overview section. Following the Overview are sections for each subsystem. Each subsystem section begins with a summary cost estimate, cost profile, and critical path. The total level 3 cost is broken down into fixed costs (M&S), engineering costs (EDIA) and labor costs. Costs are further broken down in terms of PHENIX construction funds, institutional and foreign contributions, pre-operations funding, and deferred items. Also shown is the contingency at level 3 and the level 4 breakdown of the total cost. The cost profile in fiscal years is shown at level 3. The subsystem summaries are followed by the full cost estimate and schedule sheets for that subsystem. These detailed sheets are typically carried down to level 7 or 8. The cost estimate Total, M&S, EDIA, and Labor breakdowns, as well as contingency, for each WBS entry.

  4. PHENIX Work Breakdown Structure. Cost and schedule review copy

    Energy Technology Data Exchange (ETDEWEB)

    1994-02-01

    The Work Breakdown Structure (WBS) Book begins with this Overview section, which contains the high-level summary cost estimate, the cost profile, and the global construction schedule. The summary cost estimate shows the total US cost and the cost in terms of PHENIX construction funds for building the PHENIX detector. All costs in the WBS book are shown in FY 1993 dollars. Also shown are the institutional and foreign contributions, the level of pre-operations funding, and the cost of deferred items. Pie charts are presented at PHENIX WBS level 1 and 2 that show this information. The PHENIX construction funds are shown broken down to PHENIX WBS level 3 items per fiscal year, and the resulting profile is compared to the RHIC target profile. An accumulated difference of the two profiles is also shown. The PHENIX global construction schedule is presented at the end of the Overview section. Following the Overview are sections for each subsystem. Each subsystem section begins with a summary cost estimate, cost profile, and critical path. The total level 3 cost is broken down into fixed costs (M&S), engineering costs (EDIA) and labor costs. Costs are further broken down in terms of PHENIX construction funds, institutional and foreign contributions, pre-operations funding, and deferred items. Also shown is the contingency at level 3 and the level 4 breakdown of the total cost. The cost profile in fiscal years is shown at level 3. The subsystem summaries are followed by the full cost estimate and schedule sheets for that subsystem. These detailed sheets are typically carried down to level 7 or 8. The cost estimate shows Total, M&S, EDIA, and Labor breakdowns, as well as contingency, for each WBS entry.

  5. The PHENIX Drift Chamber Front End Electroncs

    Science.gov (United States)

    Pancake, C.; Velkovska, J.; Pantuev, V.; Fong, D.; Hemmick, T.

    1998-04-01

    The PHENIX Drift Chamber (DC) is designed to operate in the high particle flux environment of the Relativistic Heavy Ion Collider and provide high resolution track measurements. It is segmented into 80 keystones with 160 readout channels each. The Front End Electronics (FEE) developed to meet the demanding operating conditions and the large number of readout channels of the DC will be discussed. It is based on two application specific integrated circuits: the ASD8 and the TMC-PHX1. The ASD8 chip contains 8 channels of bipolar amplifier-shaper-discriminator with 6 ns shaping time and ≈ 20 ns pulse width, which satisfies the two track resolution requirements. The TMC-PHX1 chip is a high-resolution multi-hit Time-to-Digital Converter. The outputs from the ASD8 are digitized in the Time Memory Cell (TMC) every (clock period)/32 or 0.78 ns (at 40 MHz), which gives the intrinsic time resolution of the system. A 256 words deep dual port memory keeps 6.4 μs time history of data at 40 MHz clock. Each DC keystone is supplied with 4 ASD8/TMC boards and one FEM board, which performs the readout of the TMC-PHX1's, buffers and formats the data to be transmitted over the Glink. The slow speed control communication between the FEM and the system is carried out over ARCNET. The full readout chain and the data aquisition system are being tested.

  6. Improving PHENIX search with Solr, Nutch and Drupal.

    Science.gov (United States)

    Morrison, Dave; Sourikova, Irina

    2012-12-01

    During its 20 years of R&D, construction and operation the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has accumulated large amounts of proprietary collaboration data that is hosted on many servers around the world and is not open for commercial search engines for indexing and searching. The legacy search infrastructure did not scale well with the fast growing PHENIX document base and produced results inadequate in both precision and recall. After considering the possible alternatives that would provide an aggregated, fast, full text search of a variety of data sources and file formats we decided to use Nutch [1] as a web crawler and Solr [2] as a search engine. To present XML-based Solr search results in a user-friendly format we use Drupal [3] as a web interface to Solr. We describe the experience of building a federated search for a heterogeneous collection of 10 million PHENIX documents with Nutch, Solr and Drupal.

  7. Tungsten Scintillating Fibers Electromagnetic Calorimeters for sPHENIX upgrade

    Science.gov (United States)

    Li, Siyang; Loggins, Vera; Phipps, Michael; Sickles, Anne

    2015-10-01

    sPHENIX, a planned new detector at RHIC, features electromagnetic and hadronic calorimetry that covers | η| design is optimized for the study of jets in heavy ion collisions. The design includes a tungsten fiber EmCal that is made out of a tower array of plastic scintillating fiber embedded inside a mixture of tungsten powder and epoxy. For this calorimeter, silicon photomultipliers will be attached at the end of the module to convert scintillated optical photons into electrical signals. The sPHENIX group at Illinois is currently making samples of these modules to study the production process and achievable density. In addition, we have set up a silicon photomultiplier read out test system which will be used to evaluate the module performance. sPHENIX collaboration and Brookhaven National Laboratory.

  8. Measurements of heavy quark production via single leptons at PHENIX

    CERN Document Server

    Hornback, Donald

    2008-01-01

    The measurement of single leptons from the semi-leptonic decay of heavy-flavor hadrons has long been a means for studying heavy-quark production. PHENIX has measured single muons in pp collisions at forward rapidity and single electrons in both pp and AuAu collisions at mid-rapidity at sqrt(s_NN)=200 GeV. The most recent PHENIX single lepton results are presented in the context of state-of-the-art pQCD calculations. An updated azimuthal anisotropy, v2(pT), measurement for heavy-flavor single electrons in AuAu collisions is also presented.

  9. Ring imaging Cherenkov detector of PHENIX experiment at RHIC

    CERN Document Server

    Akiba, Y; Burward-Hoy, J; Chappell, R; Crook, D; Ebisu, K; Emery, M S; Ferriera, J; Frawley, A D; Hamagaki, H; Hara, H; Hayano, R S; Hemmick, T K; Hibino, M; Hutter, R; Kennedy, M; Kikuchi, J; Matsumoto, T; Moscone, C G; Nagasaka, Y; Nishimura, S; Oyama, K; Sakaguchi, T; Salomone, S; Shigaki, K; Tanaka, Y; Walker, J W; Wintenberg, A L; Young, G R

    1999-01-01

    The RICH detector of the PHENIX experiment at RHIC is currently under construction. Its main function is to identity electron tracks in a very high particle density, about 1000 charged particles per unit rapidity, expected in the most violent collisions at RHIC. The design and construction status of the detector and its expected performance are described.

  10. Temperature study on PHENIX Resistive Plate Chamber 1

    Science.gov (United States)

    Solomon, Mathew

    2012-10-01

    The PHENIX collaboration is investigating the results of polarized proton + proton collisions generated by the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory. Studying these collisions will help gain perspective on the overall spin structure of the proton. PHENIX has developed a trigger upgrade for the muon arms to select single high transverse momentum (p/T) muons. A major part of this upgrade is the inclusion of 2 stations of Resistive Plate Chambers (RPC) in each arm of PHENIX. The RPCs are constructed with two gas gaps made of Bakelite and coated with linseed oil, which closely follows the CMS design. These materials are known to be sensitive to high temperatures and within PHENIX a station of RPC's are installed between two large magnets, which could cause the temperature environment to elevate. In order to gain a better understanding of the temperature of the gas gaps, we will compare the externally monitored temperature data from Run-12 to the temperatures acquired from a dedicated temperature profile study. Overall this will help the collaboration operate the RPCs in a manner that will improve their performance and extend their lifetime.

  11. Flica: a code for the thermodynamic study of a reactor or a test loop; Programme FLICA etude thermodynamique d'un reacteur ou d'une boucle d'essai

    Energy Technology Data Exchange (ETDEWEB)

    Fajeau, M. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1969-07-01

    This code handles the thermal problems of water loops or reactor cores under the following conditions: High or low pressure, steady state or transient behavior, one or two phases - Three-dimensional thermodynamic study of the flow in cylindrical geometry - Unidimensional study of heat transfer in heating elements - Neutronic studies can be coupled and a schematic representation of the safety rod behavior is given. The number of cells described in a flow cross-section is presently less than 20. This code is the logical following of FLID and CACTUS of which it constitutes a synthesis. (author) [French] Ce code permet de traiter les problemes thermiques d'une boucle ou d'un coeur de reacteur a eau dans les conditions suivantes: - Haute ou basse pression, regime permanent ou transitoire, simple ou double phase - Etude thermodynamique de l'ecoulement a 3 dimensions dans une geometrie cylindrique - Etude unidimensionnelle du transfert de chaleur dans les masses chauffantes - Possibilite de couplage avec la neutronique (reacteur point) et d'une representation schematique des actions de securite. Ce code dans lequel le nombre de cellules decrites dans une section droite de l'ecoulement est actuellement limite a 20 est la suite logique des codes FLID et CACTUS dont il constitue la synthese. (auteur)

  12. Construction of the core of the 'heavy water-gas' reactor EL 4; Structures du coeur du reacteur 'eau- lourde-gaz EL 4'

    Energy Technology Data Exchange (ETDEWEB)

    Bernard, J.L.; Foulquier, H.; Thome, P. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1964-07-01

    problem of thermal insulation around a zirconium alloy liner tube. The neutron absorption equivalent is about 1, 1 mm of Al, and the mean loss around 2 p. 100 of the thermal power of the reactor. The methods proposed have proved practicable as a result of important research and developments on automatic remote control for all the operations which make up the sequences of mounting, demounting and repairing of the construction components. In particular the possibilities opened up by the new techniques of welding tubes from the inside have been extended to other problems connected with the assembling of a reactor. (authors) [French] Le coeur de ce reacteur est constitue par une cuve contenant l'eau lourde, cuve traversee d'une serie de tubes de force dans lesquels circule le gaz caloporteur sous pression de 60 at. Les specifications de depart qui ont joue un role important dans la conception de ces structures concernent des aspects de securite de fonctionnement (chargement du combustible par les deux faces du reacteur, remplacement des structures sur les deux faces du reacteur), des necessites neutroniques (absorption des structures minimum, pas du reseau, diametre des tubes de force) et des considerations thermiques (temperature de sortie 500 C). Ces specifications ont entraine une disposition horizontale des tubes de force et des problemes d'encombrement tres delicats qui ont elimine (pour les dimensions d'EL 4) toute possibilite de recourir a des compensateurs de dilatation sur les tubes de force. II s'ensuit un dessin de cuve semi-rigide dans lequel les tubes de force contribuent pour une part importante a la resistance mecanique de l'ensemble en jouant le role de tirant, d'ou des contraintes elevees sur les jonctions et tubes de force (et le choix des alliages de zirconium). Les structures comprennent le tube de force, les jonctions, l'isolement thermique et le tube de guidage. On expose brievement les moyens d'essais mis en

  13. PHENIX EXPERIMENT AT RHIC: DECADAL PLAN 2004-2013

    Energy Technology Data Exchange (ETDEWEB)

    ZAJC,W.ET. AL.

    2003-11-30

    The PHENIX Collaboration has developed a plan for the detailed investigation of quantum chromodynamics in the next decade. The demonstrated capabilities of the PHENIX experiment to measure rare processes in hadronic, leptonic and photonic channels, in combination with RHIC's unparalleled flexibility as a hadronic collider, provides a physics program of extraordinary breadth and depth. A superlative set of measurements to elucidate the states of both hot and cold nuclear matter, and to measure the spin structure of the proton has been identified. The components of this plan include: (1) Definitive measurements that will establish the nature of the matter created in nucleus+nucleus collisions, that will determine if the description of such matter as a quark-gluon plasma is appropriate, and that will quantify both the equilibrium and non-equilibrium features of the produced medium. (2) Precision measurements of the gluon structure of the proton, and of the spin structure of the gluon and sea-quark distributions of the proton via polarized proton+proton collisions. (3) Determination of the gluon distribution in cold nuclear matter using proton+nucleus collisions. Each of these fundamental fields of investigation will be addressed through a program of correlated measurements in some or all of the following channels: (1) Particle production at high transverse momentum, studied via single particle inclusive measurements of identified charged and neutral hadrons, multi-particle correlations and jet production. (2) Direct photon, photon+jet and virtual photon production. (3) Light and heavy vector mesons. (4) Heavy flavor production. These measurements, together with the established PHENIX abilities to identify hadrons at low transverse momentum, to perform detailed centrality selections, and to monitor polarization and luminosity with high precision create a superb opportunity for performing world-class science with PHENIX for the next decade. A portion of this

  14. A TPC for sPHENIX at RHIC

    Science.gov (United States)

    Ramasubramanian, Niveditha; Dehmelt, Klaus; Sphenix Collaboration

    2016-09-01

    The sPHENIX detector is being proposed at the Relativistic Heavy Ion Collider to measure jets and upsilons for advancing our understanding of the quark gluon plasma formed in heavy ion collisions. It is also expected to form the basis of a day-1 detector for a future U.S. Electron Ion Collider. sPHENIX is based on a superconducting solenoidal magnet formerly used by the BaBar experiment, and of charged particle tracking, electromagnetic as well as hadronic calorimetry. It covers a large acceptance, 2 π in azimuth and pseudorapidities of | η | < 1, and allows to acquire data at a rate of up to 15 kHz. Furthermore, a Gas Electron Multiplier based Time Projection Chamber has been proposed to improve tracking resolution in a high multiplicity environment. In this talk we will present the current design and status of ongoing R&D and simulation studies for tracking with a TPC.

  15. The sPHENIX Detector: Design and Performance Requirements

    Science.gov (United States)

    Mannel, Eric; Sphenix Collaboration

    2016-09-01

    A new detector, sPHENIX, is being proposed to explore the quark-gluon plasma through measurements of jet properties in heavy ion collisions at the Relativistic Heavy Ion Collider, RHIC, at Brookhaven National Laboratory. The detector is based on the 1.5T super conducting solenoid magnet formerly used for the BaBar experiment and provides charged particle tracking, electromagnetic and hadronic calorimetry with a high speed data acquisition system capable of recording data at rates up to 15 KHz. In this talk we will present the performance requirements of the calorimeters and tracking systems, along with preliminary results from prototype tests at the Fermilab Test Beam Facility and future prospects for sPHENIX.

  16. First Measurements of Pion Correlations by the PHENIX Experiment

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, S C

    2001-04-11

    First identical-pion correlations measured at RHIC energies by PHENIX are presented. Two analyses with separate detectors, systematics, and statistics provide consistent results. The resulting HBT radii are moderately larger than those measured at lower energies. The k{sub t} dependence of the Bertsch-Pratt HBT radii is also similar to previous measures and is consistent with the conjecture of an expanding source.

  17. Optical Alignment System for the PHENIX Muon Tracking Chambers

    CERN Document Server

    Murata, J; Armendariz, R L; Brooks, M L; Horaguchi, T; Kamihara, N; Kobayashi, H; Lee, D M; Shibata, T A; Sondheim, W E

    2003-01-01

    A micron-precision optical alignment system (OASys) for the PHENIX muon tracking chambers is developed. To ensure the required mass resolution of vector meson detection, the relative alignment between three tracking station chambers must be monitored with a precision of 25$\\mu$m. The OASys is a straightness monitoring system comprised of a light source, lens and CCD camera, used for determining the initial placement as well as for monitoring the time dependent movement of the chambers on a micron scale.

  18. A Reaction Plane Detector for PHENIX at RHIC

    CERN Document Server

    Richardson, E; Anderson, N; Bickley, A A; Chujo, T; Cole, B A; Esumi, S; Haggerty, J S; Hanks, J; Hemmick, T K; Hutchison, M; Ikeda, Y; Inaba, M; Jia, J; Lynch, D; Miake, Y; Mignerey, A C; Niida, T; O'Brien, E; Pak, R; Shimomura, M; Stankus, P W; Todoroki, T; Watanabe, K; Wei, R; Xie, W; Zajc, W A; Zhang, C

    2010-01-01

    A plastic scintillator paddle detector with embedded fiber light guides and photomultiplier tube readout, referred to as the Reaction Plane Detector (RXNP), was designed and installed in the PHENIX experiment prior to the 2007 run of the Relativistic Heavy Ion Collider (RHIC). The RXNP's design is optimized to accurately measure the reaction plane (RP) angle of heavy-ion collisions, where, for mid-central $\\sqrt{s_{NN}}$ = 200 GeV Au+Au collisions, it achieved a $2^{nd}$ harmonic RP resolution of $\\sim$0.75, which is a factor of $\\sim$2 greater than PHENIX's previous capabilities. This improvement was accomplished by locating the RXNP in the central region of the PHENIX experiment, where, due to its large coverage in pseudorapidity ($1.0<|\\eta|<2.8$) and $\\phi$ (2$\\pi$), it is exposed to the high particle multiplicities needed for an accurate RP measurement. To enhance the observed signal, a 2-cm Pb converter is located between the nominal collision region and the scintillator paddles, allowing neutral ...

  19. Recent highlights from the PHENIX heavy ion program

    Science.gov (United States)

    Hill, J. C.

    2015-05-01

    It is accepted that a QGP can be formed in relativistic collisions of heavy nuclei (A+A). Recently long-range correlations have been observed in p+A collisions at the LHC in high multiplicity events. PHENIX has carried out a series of studies of d+Au collisions at 200 GeV to see if such correlations persist at lower energies compared to those at the LHC. Results of a study of long-range correlations and flow are presented for d+Au collisions. Data from Au+Au collisions collected during the beam energy scan (BES) was used to determine both quark and nucleon number scaling. The HBT method was used to determine radii of the fireball at kinetic freezeout. Implications for the nuclear EOS are discussed. Also results of a search for "dark photons" are presented. Recent PHENIX highlights on heavy flavor, electromagnetic probes, spin and plans for PHENIX upgrades were presented in other talks at this conference.

  20. Recent highlights from the PHENIX heavy ion program

    Directory of Open Access Journals (Sweden)

    Hill J.C.

    2015-01-01

    Full Text Available It is accepted that a QGP can be formed in relativistic collisions of heavy nuclei (A+A. Recently long-range correlations have been observed in p+A collisions at the LHC in high multiplicity events. PHENIX has carried out a series of studies of d+Au collisions at 200 GeV to see if such correlations persist at lower energies compared to those at the LHC. Results of a study of long-range correlations and flow are presented for d+Au collisions. Data from Au+Au collisions collected during the beam energy scan (BES was used to determine both quark and nucleon number scaling. The HBT method was used to determine radii of the fireball at kinetic freezeout. Implications for the nuclear EOS are discussed. Also results of a search for “dark photons” are presented. Recent PHENIX highlights on heavy flavor, electromagnetic probes, spin and plans for PHENIX upgrades were presented in other talks at this conference.

  1. Measurement and regulation of the level of a homogeneous plutonium reactor; Mesure et regulation du niveau d'un reacteur homogene au plutonium

    Energy Technology Data Exchange (ETDEWEB)

    Berger, F.; Bertrand, J

    1958-12-01

    Reactivity depends strongly on disturbances of the level of the plutonium solution In the homogeneous reactor. Proserpine has a small cylindrical core, 250 mm diameter, and 10 liters volume. With a view to reducing the dangers due to corrosion and contamination, the solution level in the core is raised by pneumatic pressure. The level is stabilized by means of a regulating system. During critical experiments the variations of the level are less than one hundredth part of a millimeter. (author) [French] Les variations du niveau de la solution de plutonium dans le reacteur homogene Proserpine ont une grosse influence sur la reactivite, car le coeur est petit (10 litres de solution dans un cylindre de diametre 250 mm). En vue de reduire les dangers dus a la corrosion et a la contamination, la commande du volume liquide est pneumatique. Nous avons realise la stabilite du niveau par une regulation qui, dans les essais en regime critique, limite les variations du plan liquide a une fraction de centieme de millimetre. (auteur)

  2. The transmutation of americium: the Ecrix experiments in Phenix; Transmutation de l'americium: les experiences ecrix dans Phenix

    Energy Technology Data Exchange (ETDEWEB)

    Garnier, J.C.; Schmidt, N. [CEA Cadarache, Dept. d' Etudes des Combustibles (DEC/SESC), 13 - Saint-Paul-lez-Durance (France); Croixmarie, Y.; Ottaviani, J.P. [CEA Cadarache, Dept. d' Etudes des Combustibles (DEC/SPUA), 13 - Saint-Paul-lez-Durance (France); Varaine, F.; Saint Jean, C. de [CEA Cadarache, Dept. d' Etudes des Reacteurs (DER/SPRC), 13 - Saint-Paul-lez-Durance (France)

    1999-07-01

    The first americium transmutation experiment in a specific target in PHENIX will occur with the ECRIX-B and ECRIX-H experiments. Beside material testing, the objective is also to represent a concept of transmutation whose specificity is to enhance the kinetics of transmutation by using a moderated spectrum. The moderator materials will be {sup 11}B{sub 4}C and CaH{sub 2} for ECRIX-B and ECRIXH respectively, the irradiation conditions have been predicted for both the neutronics and thermal. The targets (MgO-AmO{sub X} pellets) are manufactured in the ATALANTE laboratory and the design is performed according to the PHENIX operating conditions. (authors)

  3. 75 FR 66745 - Eagle and Phenix Hydro Company, Inc. and UPtown Columbus, Inc.; Notice of Application Accepted...

    Science.gov (United States)

    2010-10-29

    ... Energy Regulatory Commission Eagle and Phenix Hydro Company, Inc. and UPtown Columbus, Inc.; Notice of.... Applicants: Eagle and Phenix Hydro Company, Inc. and UPtown Columbus Inc., respectively. e. Name of Projects: Eagle and Phenix Mills and City Mills Hydroelectric Projects. f. Location: Lower Chattahoochee...

  4. QCD hard scattering results from PHENIX at RHIC

    CERN Document Server

    D'Enterria, D G

    2004-01-01

    Data on hadron production at high transverse momentum ($p_T>$ 2 GeV/$c$) in p+p, d+Au, and Au+Au collisions at $\\sqrt{s_{NN}$ = 200 GeV from the PHENIX experiment at RHIC are reviewed. The single inclusive spectrum of light hadrons produced in central Au+Au reactions shows significant differences compared to p+p and d+Au collisions, and provides interesting information on the properties of the underlying QCD medium present in heavy-ion reactions at collider energies.

  5. What have we learned (recently) from hard probes in PHENIX?

    Energy Technology Data Exchange (ETDEWEB)

    Stankus, Paul

    2014-12-15

    We report recent results from the PHENIX experiment at RHIC, touching on both full-energy, symmetric collisions of large nuclei (Au+Au), the traditional arena for presumptive QGP creation; and also on the newer regime of smaller and asymmetric systems (Cu+Cu, Cu+Au, d+Au). We see a number of results that may complicate or challenge the standard picture of QGP formation and interaction. In particular, a wealth of recent d+Au results are suggestive of dense medium formation in very small systems.

  6. Highlights from PHENIX-I: initial state and early times

    Energy Technology Data Exchange (ETDEWEB)

    Leitch, Michael J [Los Alamos National Laboratory

    2009-01-01

    We will review the latest physics developments from PHENIX concentrating on cold nuclear matter effects, the initial state for heavy-ion collisions, and probes of the earliest stages of the hot-dense medium created in those collisions. Recent physics results from p + p and d + Au collisions; and from direct photons, quarkonia and low-mass vector mesons in A+A collisions will be highlighted. Insights from these measurements into the characteristics of the initial state and about the earliest times in heavy-ion collisions will be discussed.

  7. Event reconstruction in the PHENIX central arm spectrometers

    Energy Technology Data Exchange (ETDEWEB)

    Mitchell, J.T. E-mail: mitchell@bnl.gov; Akiba, Y.; Aphecetche, L.; Averbeck, R.; Awes, T.C.; Baublis, V.; Bazilevsky, A.; Bennett, M.J.; Buesching, H.; Burward-Hoy, J.; Butsyk, S.; Chiu, M.; Christ, T.; Chujo, T.; Constantin, P.; David, G.; Denisov, A.; Drees, A.; Hansen, A.G.; Hemmick, T.K.; Jia, J.; Johnson, S.C.; Kistenev, E.; Kiyomichi, A.; Kohama, T.; Lajoie, J.G.; Lauret, J.; Lebedev, A.; Maguire, C.F.; Messer, F.; Nilsson, P.; Ohnishi, H.; Park, J.; Rosati, M.; Rose, A.A.; Ryu, S.S.; Sakaguchi, A.; Sato, S.; Shigaki, K.; Silvermyr, D.; Sugitate, T.; Sullivan, J.P.; Suzuki, M.; Tydesjoe, H.; Van Hecke, H.W.; Velkovska, J.; Volkov, M.A.; White, S.; Xie, W

    2002-04-11

    The central arm spectrometers for the PHENIX experiment at the Relativistic Heavy Ion Collider have been designed for the optimization of particle identification in relativistic heavy ion collisions. The spectrometers present a challenging environment for event reconstruction due to a very high track multiplicity in a complicated, focusing, magnetic field. In order to meet this challenge, nine distinct detector types are integrated for charged particle tracking, momentum reconstruction, and particle identification. The techniques which have been developed for the task of event reconstruction are described.

  8. Laser-induced mobilization of dust produced during fusion reactors operation; Mise en suspension par laser de poussieres generees lors du fonctionnement des reacteurs de fusion

    Energy Technology Data Exchange (ETDEWEB)

    Vatry, A.

    2010-11-16

    During tokamak operation, plasma-wall interactions lead to material erosion process and dusts production. These dusts are mainly composed by carbon and tungsten, with sizes ranging from 10 nm to 100 {mu}m. For safety reasons and to guarantee an optimum reactor functioning, the dusts have to be kept in reasonable quantity. The dusts mobilization is a first step to collect them, and the laser is a promising technique for this application. To optimize the cleaning, physical mechanisms responsible for dust ejection induced by laser have been identified. Some particles, such as aggregates, are directly ablated by the laser. The metal droplets are ejected intact by an electrostatic force, induced by the photoelectrons. We also characterized the particles ejection to choose an appropriate collection device. (author) [French] Lors du fonctionnement d'une machine de fusion, les interactions plasma-parois conduisent a des processus d'erosion des materiaux et a la production de particules. Ces poussieres sont principalement composees de carbone et de tungstene. Pour des raisons de surete et afin de garantir un fonctionnement optimum du reacteur, il est important de garder en quantite raisonnable les poussieres dont la taille varie entre 10 nm et 100 {mu}m. La mise en suspension de ces poussieres est une etape preliminaire a leur recuperation, et le laser est une technique prometteuse pour cette application. Afin d'optimiser le nettoyage, les mecanismes physiques a l'origine de l'ejection induite par laser de ces poussieres ont ete identifies. Les agregats sont directement ablates par le laser et les gouttelettes metalliques sont ejectees intactes par une force electrostatique induite par les photoelectrons. Nous avons egalement caracterise l'ejection des particules pour choisir un systeme de recuperation adapte

  9. Methods to improve track fit parameters in the PHENIX

    Science.gov (United States)

    Omiwade, Olusoji

    2003-10-01

    During the summer of 2003, several problems in the muon tracking chambers of the PHENIX experiment at Brookhaven National Lab needed to be fixed. This presentation discusses the needed software to help speed up the task of analyzing the data that were used to find broken cathode strips on one of the muon tracker stations. The inclusion of cathode strips that have been scratched or broken causes problems for chamber alignment issues and for correct track reconstruction. First we had to take the raw data obtained using the muon tracker calibration system, which sent pulses to selected anode wires though the high-voltage distributions system, and convert it into data that the CERN ROOT program could manipulate. Most of the work here will describe the set of software scripts that greatly reduced the amount of work required so that more time could be spent looking at the results of the analysis. The ROOT macros and C++ programs written were essentially for handling the job. This should result in more accurate tracking and better mass resolution for the muon arms in the PHENIX experiment.

  10. Tungsten and Scintillating Fiber Electromagnetic Calorimeter for sPHENIX

    Science.gov (United States)

    Higdon, Michael

    2016-09-01

    Utilizing the products of relativistic heavy ion collisions, one can shed light on the physics behind the earliest stages of the universe. Consisted of unbounded quarks and gluons, the Quark Gluon Plasma (QGP) results from the collisions of heavy ions. The use of electromagnetic and hadronic calorimetry is an option for studying the strong interactions which govern the QGP. The sPHENIX detector is planned for use at the Relativistic Heavy Ion Collider (RHIC) which detects jets from the collisions of large nuclei. The sPHENIX EMCal will consist of a tungsten absorber and scintillating fibers and will be read out with silicon photomultipliers. Made up of many individual towers, the EMCal covers full ϕ and large η. We will discuss the production process of these towers as well as the projectivity of the towers. Towers projective in one dimension (ϕ) have been produced and tested in beam at Fermilab. We will present recent developments in the first two dimensionally projective towers and future plans.

  11. Fulfilling the RHIC mission with sPHENIX

    Science.gov (United States)

    Connors, Megan

    2016-08-01

    RHIC has made groundbreaking contributions to the understanding of QCD under extreme conditions with the discovery of the quark gluon plasma (QGP) as a perfect fluid and first observations of energy loss. It continues to play a crucial role in understanding and quantifying the properties of the QGP as well as mapping out the QCD phase diagram. However, detailed questions concerning partonic energy loss in the QGP remain. There is a need to build a new detector at RHIC to measure important rare probes of the QGP. A new detector will benefit from advances in reconstructing jets in heavy ion collisions and the increased luminosity achievable with RHIC. Constraining models at RHIC and LHC energies are crucial for extracting the temperature dependence of transport properties of the QGP. To measure newly developed observables made at the LHC with high precision at RHIC, a detector with full azimuthal coverage and spanning a pseudorapidity range between -1.1 and 1.1, known as sPHENIX, has been proposed. The capabilities of the new detector will allow for a full understanding of jet energy loss and upsilon suppression. The goals for sPHENIX and route to achieving these goals along with the current status of the detector will be presented on behalf of the new collaboration.

  12. The PHENIX Muon Trigger Upgrade Level-1 Trigger System

    Science.gov (United States)

    Lajoie, John; Kempel, Todd

    2010-02-01

    The PHENIX Muon Trigger Upgrade adds a set of Level-1 trigger detectors to the existing muon spectrometers and will enhance the ability of the experiment to pursue a rich program of spin physics in polarized proton collisions. The upgrade will allow the experiment to select high momentum muons from the decay of W bosons and reject both beam-associated and low-momentum collision background, enabling the study of quark and antiquark polarization in the proton. The Muon Trigger Upgrade will add momentum and timing information to the present muon Level-1 trigger, which only makes use of tracking in the PHENIX muon identifier (MuID) panels. Signals from new Resistive Plate Chambers (RPCs) and re-instrumented planes in the existing muon tracking (MuTr) chambers will provide momentum and timing information for the new Level-1 trigger. An RPC timing resolution of ˜2 ns will permit rejection of beam related backgrounds while tracking information from the RPCs and MuTr station will be used by the trigger to select events with high momentum muon candidates. The RPC and MuTr hit information will be sent by optical fibers to a set of Level-1 trigger processors that will make use of cutting edge FPGA technology to provide very high data densities in a compact form factor. The layout of the upgrade, details of the Level-1 electronics and trigger algorithm development will be presented. )

  13. Chemical elimination of alumina in suspension in nuclear reactors heavy water; Elimination de l'alumine en suspension dans l'eau lourde des reacteurs nucleaires par voie chimique

    Energy Technology Data Exchange (ETDEWEB)

    Ledoux, A. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1967-02-01

    Corrosion of aluminium in contact with moderating water in nuclear reactor leads to the formation of an alumina hydrosol which can have an adverse effect on the operation of the reactor. Several physical methods have been used in an attempt to counteract this effect. The method proposed here consists in the elimination of the aluminium by dissolution and subsequent fixation in the ionic form on mixed-bed ion-exchange resin. In order to do this, the parameters and the values of these parameters most favorable to the dissolution process have been determined. If the moderator is heavy water, the deuterated acid can be prepared by converting a solution in heavy water to a salt of the acid using a deuterated cationic resin. (author) [French] La corrosion de l'aluminium au contact de l'eau moderatrice des reacteurs nucleaires, donne lieu a la formation d'un hydrosol d'alumine nuisible au bon fonctionnement des reacteurs. Plusieurs methodes physiques ont ete mises en oeuvre pour pallier ces inconvenients. On propose ici d'eliminer l'alumine par solubilisation pour la fixer ensuite sous forme ionique par des resines echangeuses d'ions, en lit melange. A cette fin on determine les parametres et leurs grandeurs favorables a cette solubilisation. Si le moderateur est de l'eau lourde la preparation d'acide deutere peut etre effectuee par passage d'une solution en eau lourde a un sel de l'acide sur resine cationique deuteree.

  14. Developpement d'un compresseur d'hydrogene base sur le cyclage thermique des hydrures metalliques

    Science.gov (United States)

    Laurencelle, Francois

    La compression de l'hydrogene est une etape incontournable de son utilisation dans l'industrie actuelle et dans les nouvelles applications energetiques de l'hydrogene (stockage stationnaire et transport). Les compresseurs mecaniques traditionnellement utilises posent plusieurs problemes d'ingenierie, de securite et de maintenance qui pourraient etre contournes en developpant de nouvelles technologies mieux adaptees a l'hydrogene. Dans cette these, notre objectif est de developper d'un compresseur d'hydrogene base sur les hydrures metalliques pouvant etre connecte a la sortie d'un electrolyseur fonctionnant a basse pression et d'ainsi repondre au besoin de productioncompression d'hydrogene decentralisee. La methodologie du projet comprend plusieurs etapes. Premierement, nous faisons la revue bibliographique des projets impliquant des compresseurs a hydrures metalliques. Deuxiemement, a travers des travaux experimentaux, nous recherchons des hydrures permettant une compression efficace entre 20 et 80°C. Les materiaux sont synthetises par fusion a arc electrique et caracterises sur bancs d'essais d'hydrogenation. La structure de certains materiaux est aussi investiguee par rayons X, methode de B.E.T. et microscopie electronique. Troisiemement, un reacteur d'hydrures est concu de maniere a promouvoir des echanges de chaleur rapides et efficaces. Quatriemement, le prototype et son interface de controle sont construits. Cinquiemement, le compresseur est caracterise pour en evaluer les performances en termes de debit et de capacite. Les resultats obtenus sont presentes dans trois articles publies et dans le chapitre 5 de cette these. Le compresseur (article I) est base sur trois hydrures (LaNi 4.8Sn0.2, LaNi5 et MMNi4.7Al0.3 ). Celui-ci permet d'atteindre un debit de compression de 10 a 20 L d'hydrogene par heure et son efficacite est, estimee a ˜5% par rapport a un compresseur adiabatique ideal. Il a ete demontre que l'efficacite pourrait etre augmentee en utilisant un

  15. Improvements in gas supply systems for heavy-water moderated reactors; Etudes de perfectionnements aux systemes d'alimentation en gaz d'un reacteur modere a l'eau lourde

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, G.; Hassig, J.M.; Laurent, N.; Thomas, B. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1964-07-01

    In a heavy-water moderated reactor cooled by pressurized gas, an important problem from the point of view, of the reactor block and its economics is the choice of the gas supply system. In the pressure tube solution, the whole of the reactor block structure is at a relatively low temperature, whereas the gas supply equipment is at that of the gas, which is much higher. These parts, through which passes the heat carrying fluid have to present as low a resistance as possible to it so as to avoid costly extra blowing power. Finally, they may only be placed in the reactor block after it has been built; the time required for putting them in position should therefore not be too long. The work reported here concerns the various problems arising in the case of each channel being supplied individually by a tube at the entry and the exit which is connected to a main circuit made up of large size collectors. This individual tubing is sufficiently flexible to absorb the differential expansion and the movement of its ends without stresses or prohibitive reactions being produced; the tubing is also of relatively short length so as to reduce the pressure head of the pressurized gas outside the channels; the small amount of space taken up by the tubing makes it possible to assemble it in a manner which is satisfactory from the point of view both of the time required and of the technical quality. (authors) [French] Dans un reacteur modere a l'eau lourde et refroidi au gaz sous pression, un probleme important du point de vue du trace du bloc pile et de son economie est le choix du systeme d'alimentation en gaz. Pour une solution a tubes de force, l'ensemble des structures du bloc reacteur est a temperature relativement faible, alors que les organes d'alimentation en gaz sont a celle, notablement plus elevee, du gaz. Ces organes, traverses par le debit du caloporteur, doivent lui opposer le minimum de resistance afin de ne pas necessiter un supplement onereux de

  16. [Project for] a high-flux extracted neutron beam reactor [for physicists]; Un [projet de] reacteur a haut flux et faisceaux sortis [pour physiciens

    Energy Technology Data Exchange (ETDEWEB)

    Ageron, P. [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

    1964-07-01

    the beam extraction tubes and the experimental equipment which can support doses much higher than the ones which are biologically permissible. The final part of the communication describes the studies carried out on the realization of a liquid hydrogen cold sink, one of the most important experimental devices envisaged. (authors) [French] Les besoins francais en canaux pour sortie de neutrons de differentes energies sont brievement indiques. L'interet bien connu des neutrons froids (plus de 4 Angstroem) est souligne. Les grandes lignes d'un reacteur permettant de satisfaire les physiciens sont esquissees. Ce sont les suivantes: 1 - Flux dans l'eau lourde du reflecteur de l'ordre de 7. 10{sup 14} thermiques. 2 - Souplesse d'emploi maximum obtenue par: - separation physique du coeur et du reflecteur, - independance des experiences entre elles, - possibilite de modification, sans interruption notable du fonctionnement de la pile, des experiences physiques jusqu'a - et y compris - la nature du reflecteur utilise, - reduction au minimum des protections fixes; emploi largement generalise des protections liquides (eau) et fluidisees (sables). 3 - Continuite technologique aussi grande que possible avec les reacteurs de recherche francais existant ou en construction (SILOE, PEGASE, OSIRIS). 4 - Surete de fonctionnement recherche par la simplicite de conception. 5 - Minimisation des frais de construction. La reduction des frais d'exploitation est recherchee plutot indirectement par la simplicite des solutions et la reduction du personnel d'exploitation, que directement par la minimisation des consommations d'elements combustibles et d'energie. La solution preconisee peut etre decrite comme un reacteur de type piscine a coeur clos, non pressurise, tres sous modere par l'eau legere de refroidissement. Entourant le reacteur, se trouvent un certain nombre de 'canaux boucles' comprenant chacun: - une portion du

  17. Public debate on the EPR reactor; Debat public sur le reacteur EPR

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-10-15

    In the framework of the new EPR European Pressurized Reactor implementation in France, the public asked the first Ministry on the protection of nuclear matters, transports and installations against the terrorism and the spiteful actions. This document provides information on the subject and shows the safety of the new reactor. (A.L.B.)

  18. The JHR reactor: a multipurpose asset for materials; Le reacteur RHJ: polyvalence au service des materiaux

    Energy Technology Data Exchange (ETDEWEB)

    Iracane, D.; Yvon, P. [CEA Saclay, Dir. de l' Energie Nucleaire, 91 - Gif sur Yvette (France)

    2007-07-01

    The creeping obsolescence of experimental irradiation reactors around the world, in the European Union in particular, means that the Jules Horowitz Reactor (JHR), due to be commissioned by CEA in 2014, at Cadarache, is an essential addition, whether it be for the investigation of materials, or of novel fuels. Its capabilities extend beyond the requirements of investigations relating to fourth-generation systems. (authors)

  19. The 900 MWe reactor check-up; Le check-up des reacteurs de 900 MWe

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2010-07-15

    A set of articles presents the third decennial visit of the thirty-four 900 MW French nuclear reactors. This process started in 2009 in Tricastin and Fessenheim. For this visit, reactors are stopped, one after the other, for three months, in order to re-examine safety issues. The different involved actors and their roles are presented: EDF, the IRSN, the ASN and the GPR (the expert group for nuclear reactors). Some specific issues are evoked by some experts and interveners. The case of Fessenheim, the visit of which lasted five months, is somehow more widely commented

  20. The experimental and technological developments reactor; Le reacteur d'etudes et de developpements technologiques

    Energy Technology Data Exchange (ETDEWEB)

    Carbonnier, J.L. [CEA Cadarache, Dept. d' Etudes des Reacteurs (DEN/DER), 13 - Saint-Paul-lez-Durance (France)

    2003-07-01

    THis presentation concerns the REDT, gas coolant reactor for experimental and technological developments. The specifications and the research programs concerning this reactor are detailed;: materials, safety aspects, core physic, the corresponding fuel cycle, the reactor cycle and the program management. (A.L.B.)

  1. Transversity and Transverse-Momentum Distribution Measurements from Phenix and Brahms

    Science.gov (United States)

    Aidala, C.

    2009-04-01

    A variety of measurements performed utilizing transversely polarized proton-proton collisions at the Relativistic Heavy Ion Collider (RHIC) are now available. Recent results from the PHENIX and BRAHMS experiments are presented and discussed.

  2. Transversity and Transverse-Momentum-Dependent Distribution Measurements from PHENIX and BRAHMS

    CERN Document Server

    Aidala, C

    2008-01-01

    A variety of measurements performed utilizing transversely polarized proton- proton collisions at the Relativistic Heavy Ion Collider (RHIC) are now avail- able. Recent results from the PHENIX and BRAHMS experiments are presented and discussed.

  3. Results from the PHENIX RPC R and D and long-term performance monitoring

    Energy Technology Data Exchange (ETDEWEB)

    He Xiaochun, E-mail: xhe@gsu.edu [Department of Physics and Astronomy, Georgia State University, Atlanta, GA 3030 (United States)

    2012-01-01

    A new Resistive Plate Chamber (RPC) based fast muon trigger system has been developed and partially installed in the PHENIX experiment. This new trigger will allow the PHENIX data acquisition system to efficiently sample high p{sub T} (>20GeV/c) muons from W decays in polarized proton+proton collisions at {radical}(s)=500GeV at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. This measurement will significantly improve our knowledge of flavor separated quark and anti-quark polarization in the proton. Since 2005, a multi-institutional effort within the PHENIX Forward Trigger group was devoted to study the properties and performance of bakelite RPCs. In this presentation, the results of the PHENIX RPC R and D will be reported.

  4. Global variables and identified hadrons in the PHENIX experiment

    Indian Academy of Sciences (India)

    John P Sullivan

    2003-05-01

    PHENIX measurements related to global variables and identified hadrons are discussed. These include two-pion correlations, elliptic flow, and dN=dη. Measurements of event-by-event fluctuations in mean transverse momentum, mean transverse energy, and net charge are presented for particles within the PHENIX acceptance. The centrality dependence of these measurements is also discussed.

  5. Silicon Photomultiplier Characterization for sPHENIX Calorimeters

    Science.gov (United States)

    Tanner, Meghan; Skoby, Michael; Aidala, Christine; Sphenix Collaboration

    2016-09-01

    Silicon photomultipliers (SiPMs) are preferable to photomultiplier tubes due to their small size, insensitivity to magnetic fields, low operating voltage, and capability of detecting single photons. The sPHENIX collaboration at RHIC will use SiPMs in their proposed electromagnetic and hadronic calorimeters. The University of Michigan is assembling and implementing a test stand to characterize the dark count rate, temperature dependence, gain, and photon detection efficiency of SiPMs. To more accurately determine the dark count rate, we have constructed a light tight box to isolate the SiPM, which surrounds an electronics enclosure that protects the SiPM circuitry, and installed software to record the output signals. With this system, we will begin to collect data and optimize the system to test arrays of SiPMs instead of single devices as the proposed calorimeters will require testing approximately 115,000 SiPMs.

  6. Performance of Front-End Readout System for PHENIX RICH

    Energy Technology Data Exchange (ETDEWEB)

    Oyama, K.; Hamagaki, H.; Nishimura, S.; Shigaki, K.; Hayano, R.S.; Hibino, M.; Kametani, S.; Kikuchi, J.; Matsumoto, T.; Sakaguchi, T.; Ebisu, K.; Hara, H.; Tanaka, Y.; Ushiroda, T.; Moscone, C.G.; Wintenberg, A.L.; Young, G.R.

    1999-11-15

    A front-end electronics system has been developed for the Ring Imaging Cerenkov (RICH) detector of the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC), Brookhaven National Laboratory (BNL). A high speed custom back-plane with source synchronous bus architecture, a full custom analog ASIC, and board modules with FPGA's and CPLD's were developed for high performance real time data acquisition. The transfer rate of the back-lane has reached 640 MB/s with 128 bits data bus. Total transaction time is estimated to be less than 30 {micro}s per event. The design specifications and test results of the system are presented in this paper.

  7. Two further years of operation of the reactor G1 (july 1958 - july 1960); Deux nouvelles annees de fonctionnement du reacteur G1. (juillet 1958 - Juillet 1960)

    Energy Technology Data Exchange (ETDEWEB)

    Mathot, P.; Bauzit, J.; Cante, R.; Hebrard, L. [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

    1960-07-01

    observations ont pu etre faites sur l'empilement de graphite, en meme temps qu'etait accru le nombre de points de mesure des temperatures des gaines du combustible. - Du 25 septembre 1959 au 9 decembre 1959: preparation et execution du deuxieme recuit. A l'issue du recuit, le reseau de thorium a ete modifie et des thermocouples supplementaires donnant la temperature de la masse du graphite ont ete mis en place. Un appareillage permettant la mesure du flux radial a ete realise. - Du 9 decembre 1959 a juillet 1960: campagne de fonctionnement continu, avec le minimum d'arrets. Les resultats d'experience sont regroupes, independamment de toute chronologie sous trois grandes rubriques qui president a la vie du reacteur: - Fonctionnement continu, - Dechargements, - Recuits du reacteur. (auteur)

  8. Automation of nonlinear calculations in the theory of fusion reactor; Automatisation des calculs non lineaires dans la theorie des reacteurs a fusion

    Energy Technology Data Exchange (ETDEWEB)

    Braffort, P.; Chaigne, M. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1958-07-01

    decharge dans le cas stationnaire et l'on compare avec les resultats de l'experience. 4) On decrit la resolution analogique du probleme dynamique de l'evolution du courant de decharge dans un cas simple et l'on compare avec les resultats de l'experience. 5) On decrit la resolution analogique du mouvement des ions isoles dans un champ electromagnetique et l'on decrit le simulateur de champ spatial utilise dans ce probleme (probleme bidimensionnel). 6) On decrit la resolution analogique du probleme precedent dans le cas tridimensionnel pour des geometries particulieres (notamment toroidale) grace a l'emploi simultane de deux simulateurs de champ. 7) On decrit une methode de calcul derivee de la methode de Monte-Carlo, susceptible de s'adapter a l'etude de la dynamique des plasmas et l'on decrit le materiel de commutation-memorisation utilise. 8) Conclusion: On indique la difference profonde que presentent les calculs analogiques pour l'etude des reacteurs a fission et a fusion. On discute notamment la theorie du controle presentee par SCHULTZ en comparant les resultats du calcul linearise a ceux de la simulation non lineaire. (auteur)

  9. CO{sub 2} direct cycles suitable for AGR type reactors; Cycles directs de gaz carbonique applicables aux reacteurs du genre AGR

    Energy Technology Data Exchange (ETDEWEB)

    Maillet, E. [Commissariat a l' Energie Atomique. Centre d' Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)

    1967-10-01

    The perspectives given by the gas turbines under pressure, to build simple nuclear power plants and acieving significantly high yield, are specified. The CO{sub 2} is characterised by by good efficiency under moderate temperature (500 to 750 Celsius degrees), compactness and the simpleness of machines and the safe exploitation (supply, storage, relief cooling, thermosyphon). The revision of thermal properties of the CO{sub 2} and loss elements show that several direct cycles would fit in particular to the AGR type reactors. Cycles that would diverge a little from classical models and able to lead to power and heat generation can lead by simple means to the best results. Several satisfying solutions present for the starting up, the power regulation and the stopping. The nuclear power plant components and the functioning safety are equally considered in the present report. The conclusions stimulate the studies and realizations of carbon dioxide gas turbines in when approprite. [French] Les perspectives offertes par la turbine a gaz sous pression, pour construire des centrales nucleaires simples et de rendement progressivement eleve, se precisent actuellement. le CO{sub 2} se distingue par sa bonne efficacite a temperature moderee (500 a 750 degres celsius), la compacite et la simplicite des machines, et la surete qu'il apporte a l'exploitation ( approvisionnement, stockage, refroidissement de secours, thermosiphon). La revision des proprietes thermophysiques du CO{sub 2} et des elements de pertes montre que divers cycles directs conviendraient en particulier aux reacteurs agr ou derives. Des cycles s'ecartant peu des modeles classiques, et se pretant ulterieurement a la production simultanee d'electricite et de chaleur, peuvent conduire par des moyens simples aux meilleurs resultats d'ensemble. Plusieurs solutions satisfaisantes se presentent pour le demarrage, le reglage de la puissance et l'arret. Les composants de la centrale et la

  10. A fly-wheel drive with controlled-torque clutch for a reactors cooling circuit pumps; Entrainement des pompes du circuit de refrigeration d'un reacteur par volant a embrayage sous couple controle

    Energy Technology Data Exchange (ETDEWEB)

    Riettini, A. [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

    1964-10-15

    After a theoretical study on the slowing down of a centrifugal pump, the motion equations have been checked by means of experimental tests. In order to have important slowing down times (which is the case of the cooling pumps of a research reactor) it is necessary to add a fly-wheel. To prevent troubles when starting, a block pump-fly-wheel with clutch under controlled torque was developed. It is so possible to start the fly-wheel progressively without increasing too much power of the driving motor. (author) [French] Apres une etude theorique sur le mouvement de ralentissement d'une pompe centrifuge, les equations du mouvement ont ete verifiees par des essais pratiques. Pour obtenir des temps de ralentissement importants (cas des pompes de refrigeration d'un reacteur de recherche) il est necessaire d'y adjoindre un volant d'inertie. Pour eviter les inconvenients au demarrage, on a etudie un ensemble pompe-volant avec embrayage sous couple controle. Cette solution permet de lancer progressivement le volant sans augmentation appreciable de la puissance du moteur d'entrainement. (auteur)

  11. The forward sPHENIX detector design and its physics program

    Science.gov (United States)

    da Silva, Cesar L.; Phenix Collaboration

    2013-10-01

    The PHENIX detector at RHIC is planing a complete new design to respond some of the physics questions which emerged after the recent discoveries at RHIC and LHC, namely how jets lose energy in a hot and dense medium with minimal share viscosity. Studies have been carried out also in designing a set of forward detectors (fsPHENIX) including high momentum resolution tracking, calorimetry and particle identification covering the pseudo-rapidity region of 1 BRAHMS in p+A and A+A collisions, deeply studying the initial state in such collisions and covering a broad baryon density phase space. Long range correlation can also be measured at RHIC for the first time. The forward region is also crucial for the spin program. Transverse spin asymmetries from Collins and Sivers effects in jets and Drell Yan yields in the unexplored large Feynman momentum xF region, where these effects are larger, would be accessible as well as small momentum fraction gluon contribution to the proton spin (ΔG). Ultimately, fsPHENIX will be the hadron detector of the future ePHENIX in the eIC RHIC era. This presentation will briefly report the physics, the design and the performance in simulations of fsPHENIX.

  12. The RES reactor, a test reactor for naval propulsion; Le reacteur d'essais RES, reacteur d'essais de la propulsion navale

    Energy Technology Data Exchange (ETDEWEB)

    Pivet, S. [CEA Bruyeres-le-Chatel, 91 (France); Minguet, J.L. [AREVA-Technicatome, 13 - Aix en Provence (France)

    2005-07-01

    The RES, the new test reactor for naval propulsion, will replace the RNG that nears the end of its operating life after 30 years in service. The main asset of a land-based installation is to provide an in-core instrumented reactor while the on-board system must stay as simple as possible for robustness reasons. The objective of the RES is fivefold: 1) to foresee and help solving problems likely to happen on on-board reactor, 2) to validate nuclear fuels and reactor systems for naval propulsion, 3) to validate reactor system and equipment for the Barracuda submarine program, 4) to upgrade the on-ground facility located at Cadarache, and 5) to provide the Cea with a new capacity for the storing of spent fuels from naval propulsion systems and from Cea research reactors. The RES facility is made of 2 parts: one that houses the reactor and the other that is dedicated to the handling on spent fuels, their examination through a gamma spectrometry bench and their storing in a pool. The RES facility is scheduled to open in 2009. (A.C.)

  13. Electronics cooling of Phenix multiplicity and vertex detector

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Z.; Gregory, W.S.

    1996-08-01

    The Multiplicity and Vertex Detector (MVD) uses silicon strip sensors arranged in two concentric barrels around the beam pipe of the PHENIX detector that will be installed at Brookhaven National Laboratory. Each silicon sensor is connected by a flexible kapton cable to its own front-end electronics printed circuit board that is a multi-chip module or MCM. The MCMs are the main heat source in the system. To maintain the MVD at optimized operational status, the maximum temperature of the multi-chip modules must be below 40 C. Using COSMOS/M HSTAR for the Heat Transfer analysis, a finite element model of a typical MCM plate was created to simulate a 9m/s airflow and 9m/s mixed flow composed of 50% helium and 50% air respectively, with convective heat transfer on both sides of the plate. The results using a mixed flow of helium and air show that the average maximum temperature reached by the MCMs is 37.5 C. The maximum temperature which is represented by the hot spots on the MCM is 39.43 C for the helium and air mixture which meets the design temperature requirement 40 C. To maintain the Multiplicity and Vertex Detector at optimized operational status, the configuration of the plenum chamber, the power dissipated by the silicon chips, the fluid flow velocity and comparison on the MCM design parameters will be discussed.

  14. LED Monitoring System of the Phenix Muon Piston Calorimeter

    Science.gov (United States)

    Motschwiller, Steven

    2010-11-01

    The Muon Piston Calorimeter in the PHENIX experiment at RHIC has a monitoring system consisting of LEDs and PIN diodes to calibrate out the time dependent changes to the detector. The LEDs track the temperature and radiation-damage changes to the response of the MPC, while the absolute calibration can be done using 0̂ decays. To execute this, LEDs flash light through the PbWO4 crystal to the Avalanche Photo Diodes The MPC is made up of 416 independent electromagnetic calorimeter towers. By using the LEDs we can correct for changes in the gains of each tower in the MPC, on a run by run basis. Because the LED value only gives a relative measurement of the gain over time, this method of calibration can only be used in conjunction with absolute calibrations provided by 0̂ decays or by minimum ionizing peaks . This work will be used to make a final measurement on Transverse energy at √sNN = 200 GV in Au+Au collisions.

  15. sPHENIX: The next generation heavy ion detector at RHIC

    CERN Document Server

    ,

    2016-01-01

    sPHENIX is a new collaboration and future detector project at Brookhaven National Laboratory's Relativistic Heavy Ion Collider (RHIC). It seeks to answer fundamental questions on the nature of the quark gluon plasma (QGP), including its temperature dependence and coupling strength, by using a suite of precision jet and upsilon measurements that probe different length scales of the QGP. This will be achieved with large acceptance, $|\\eta| < 1$ and $0$-$2\\pi$ in $\\phi$, electromagentic and hadronic calorimeters and precision tracking enabled by a $1.5$ T superconducting magnet. With the increased luminosity afforded by accelerator upgrades, sPHENIX will perform high statistics measurements extending the kinematic reach at RHIC to overlap the LHC's. This overlap with the LHC will facilitate better understanding of the role of temperature, density and parton virtuality in QGP dynamics and for jet quenching in particular. This talk will focus on key future measurements and the current state of the sPHENIX proje...

  16. Cold Nuclear Matter Effects in d+Au Collisions at PHENIX

    CERN Document Server

    Sahlmueller, Baldo

    2012-01-01

    To interpret the measurements in heavy-ion collisions at the Relativistic Heavy-Ion Collider (RHIC), it is crucial to understand the initial state of the colliding gold (Au) nuclei. The parton distribution in Au nuclei is modified compared to protons, and their isospin composition is different due to the presence of neutrons. d+Au collisions at RHIC at the same collision energies are an important tool to study initial state modifications. PHENIX has measured pi0, eta, and reconstructed jets at high transverse momentum. These data are compared to predictions from nuclear parton distribution functions. Furthermore, single electrons from heavy-flavor decays have been measured by PHENIX.

  17. Study of Charmonium Production in Asymmetric Nuclear Collisions by the PHENIX Experiment at RHIC

    CERN Document Server

    ,

    2015-01-01

    The measurement of quarkonia production in relativistic heavy ion collisions provides a powerful tool for studying the properties of the hot and dense matter created in these collisions. To be really useful, however, such measurements must cover a wide range of quarkonia states and colliding species. The PHENIX experiment at RHIC has successfully measured J/psi, psi-prime, chi_c and Upsilon production in different colliding systems at various energies. In this talk I will present recent results from the PHENIX collaboration on charmonium production in d+Au, Cu+Au and U+U collisions at 200 GeV/c.

  18. Mise au point d'un reacteur epitaxial CBE

    Science.gov (United States)

    Pelletier, Hubert

    Ce projet de maîtrise consiste à l'asservissement et la mise en marche d'un réacteur d'épi-taxie par jets chimiques au Laboratoire d'Épitaxie Avancée de l'Université de Sherbrooke. Le réacteur sert à la croissance dans l'ultravide de matériaux semi-conducteurs tels que l'arséniure de gallium (GaAs) et le phosphure d'indium-gallium (GaInP). La programmation LabVIEW™ et du matériel informatique de National Instruments sont utilisés pour asservir le réacteur. Le contrôle de la température de l'échantillon et de la pression de contrôle des réactifs de croissance dans le réacteur est assuré par des boucles de rétroaction. Ainsi, la température de l'échantillon est stabilisée à ±0, 4 °C, alors que les pressions de contrôle de gaz peuvent être modulées sur un ordre de grandeur en 2 à 4 secondes, et stabilisées à ±0, 002 Torr. Le système de pompage du réacteur a été amélioré suite à des mesures de vitesse de pompage d'une pompe cryogénique. Ces mesures révèlent une dégradation sur plus d'un ordre de grandeur de son pompage d'hydrogène avec l'opération à long terme. Le remplacement de la pompe cryogénique par une pompe turbo-moléculaire comme pompe principale a permis d'améliorer la fiabilité du système de pompage du système sous vide. D'autre part, la conductance du système d'acheminement de gaz et d'injection a été augmentée afin de réduire un effet mémoire des sources le système et faciliter la croissance de matériaux ternaires. Ainsi, des croissances de GaAs (100) sur substrat de même nature ont été effectuées et ont révélé un matériau de bonne qualité. Sa rugosité moyenne de 0,17 nm, mesurée par microscopie à force atomique, est très faible selon la littérature. De plus, une mobilité élevée des porteurs est obtenue à fort dopage au silicium, au tellure et au carbone, notamment une mobilité de 42 ± 9 cm2V -1s-1 des porteurs majoritaires '(trous) lors du dopage au carbone à 1, 5 · 1019

  19. Some fundamental aspects of boiling in nuclear reactors; Quelques aspects fondamentaux de l'ebullition dans les reacteurs nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Mondin, H.; Lavigne, P.; Semeria, R. [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

    1964-07-01

    oscillation, the conditions of burnout are compared with those obtained under steady conditions. The burn-out flux following uniform 'stopped' heating has been studied in a channel containing still water. The flux shows a maximum as a function of unsaturation. The influence of the geometry and the nature of the metal was investigated. 4 - Output Oscillations: Using a low pressure (8 atm) loop, the influence of various parameters on the periods of output oscillations in a boiling channel on the thresholds at which they appear, was studied. Some new aspects of this complex phenomena were observed and are reported. (authors) [French] On indique les principaux resultats obtenus a Grenoble depuis quatre ans dans le domaine des mecanismes de l'ebullition et des phenomenes connexes dans les reacteurs nucleaires. 1 - OBSERVATION DE L'EBULLITION: Par photographie et cinematographie ultrarapide (8000 images par seconde maximum) on a observe l'ebullition en vase ou en canal jusqu'a 140 kg/cm{sup 2}. On a denombre les populations de germes (sites) generateurs de bulles et obtenu une correlation donnant leur nombre par unite de surface en fonction du flux thermique et de la pression. Le diametre des bulles se detachant de la paroi a ete etudie jusqu'a 140 kg/cm{sup 2}. On a mis en evidence trois types de bulles: - Les bulles en equilibre dont le diametre suit la formule de Fritz et Ende, - Les bulles d'ebullition dont le diametre diminue rapidement avec la pression (1/100 mm a 140 kg/cm{sup 2}), - Les coalescences apparaissant en liquide sature au-dessus de 15 W/cm{sup 2} et dont la proportion est independante de la pression. Par visualisation en strioscopie on observe les mouvements du film thermique associes a l'amorcage des germes, au depart et a la condensation des bulles; les mecanismes responsables de l'excellent transfert de chaleur ont pu ainsi etre precises. 2 - PERTES DE PRESSION EN ECOULEMENT DIPHASE: On a etabli un modele de

  20. Analysis of sample and fuel pin irradiation experiments in Phenix for basic nuclear data validation

    Energy Technology Data Exchange (ETDEWEB)

    D' Angelo, A.; Cleri, F. (ENEA, Casaccia Nuclear Research Centre, Dipartimento Reattori Veloci, 0060 Casaccia (IT)); Marimbeau, P.; Salvatores, M.; Grouiller, J.P. (Centre d' Etudes Nucleaires de Cadarache, Service de Physique des Reacteurs et du Cycle, Dept. de Recherche Physique, 13108 St. Paul-lez-Durance (FR))

    1990-07-01

    This paper presents comparisons between calculations and experimental data from fuel irradiation experiments performed in Phenix. Both the French CARNAVAL-IV system and the recently developed JEF-1 basic data file are used. The global consistency of the results is excellent and the compared values are, in general, very satisfactory. In some cases, indications for evaluated data modifications are obtained.

  1. PHENIX results on L\\'evy analysis of Bose-Einstein correlation functions

    CERN Document Server

    Kincses, Dániel

    2016-01-01

    The nature of the quark-hadron phase transition can be investigated through analyzing the space-time structure of the hadron emission source. For this, the Bose-Einstein or HBT correlations of identified charged particles are among the best observables. In this paper we present the latest results from the RHIC PHENIX experiment on such measurements.

  2. Decision-making in structure solution using Bayesian estimates of map quality: the PHENIX autosol wizard

    Energy Technology Data Exchange (ETDEWEB)

    Terwilliger, Thomas C [Los Alamos National Laboratory; Adams, Paul D [LBNL; Read, Randy J [UNIV OF CAMBRIDGE; Mccoy, Airlie J [UNIV OF CAMBRIDGE

    2008-01-01

    Ten measures of experimental electron-density-map quality are examined and the skewness of electron density is found to be the best indicator of actual map quality. A Bayesian approach to estimating map quality is developed and used in the PHENIX AutoSol wizard to make decisions during automated structure solution.

  3. phenix.ensemble_refinement: a test study of apo and holo BACE1

    NARCIS (Netherlands)

    Burnley, B.T.; Gros, P.

    2013-01-01

    phenix.ensemble_refinement (Burnley et al. 2012) combines molecular dynamic (MD) simulations with X-­‐ray structure refinement to generate ensemble models fitted to diffraction data. It is an evolution of the ‘time-­‐averaging’ method first proposed by Gros et al. in 1990 (Gros, van Gunsteren, and H

  4. Le funambule et le parergon

    Directory of Open Access Journals (Sweden)

    Xavier Jeudon

    2015-09-01

    Full Text Available Loin de la fascination qu’exerce la chute, promesse de renouveau pour Baudelaire et de plaisir pour Adorno, le funambule fait quotidiennement l’expérience d’une prise et d’une maîtrise du risque. Faisant du risque un spectacle, le funambule évolue sur un fil, nous renvoyant aux premières sensations de la marche, mal assurée, hésitante et tellement audacieuse. Le funambule travaillant au quotidien son équilibre se doit donc de prendre des risques, mais aussi de donner l’illusion d’une première fois : simuler le danger là où il est pourtant. C’est en jouant sur le moment de la rupture, de la chute que le funambule capte l’attention. Il donne un corps à cette question de la limite et semble nous proposer une adaptation douce au risque, là où le dompteur parait s’y opposer plus frontalement.

  5. Le Comique

    OpenAIRE

    Pasquier, Renaud

    2011-01-01

    J’ai pris un trait d’un côté et un trait d’un autre ; et de ces divers traitsqui pouvaient convenir à une même personne, j’en ai fait des peinturesvraisemblables, cherchant moins à réjouir les lecteurs par le caractère,ou comme le disent les mécontents, par la satire de quelqu’un, qu’à leurproposer des défauts à éviter et des modèles à suivre.Jean de La Bruyère, Discours de réception à l’Académie française, 1693. Le spectacle s’achève après deux rappels sous les applaudissements d’un public c...

  6. Le Japon

    OpenAIRE

    Aveline, Natacha

    2004-01-01

    Ouvrage général de géographie et d'économie du Japon comportant de nombreuses illlustrations, une bibliographie commentée et des sujets pour les examens de géographie.; Cet ouvrage examine l'organisation spatiale du modèle de croissance japonais à toutes ses étapes, de ses origines (de l'époque Meiji à la fin du XIXe siècle) à la crise de Heisei (de 1991 à nos jours). Il fait état de la diversité des défis auxquels est confronté l'archipel dans le nouveau contexte mondialisé. Le regard se por...

  7. PHENIX Measurements of Single Electrons from Charm and Bottom Decays at Midrapidity in Au + Au Collisions

    Science.gov (United States)

    McGlinchey, D.

    2016-12-01

    Heavy quarks are an ideal probe of the quark gluon plasma created in heavy ion collisions. They are produced in the initial hard scattering and therefore experience the full evolution of the medium. PHENIX has previously measured the modification of heavy quark production in Au+Au collisions at √{sNN} = 200 GeV via electrons from semileptonic decays, which indicated substantial modifications of the parent hadron momentum distribution. The PHENIX barrel silicon vertex detector (VTX), installed in 2011, allows for the separation of electrons from charm and bottom hadron decays through the use of displaced vertex measurements. These proceedings present the results of the completed analysis of the 2011 data set using the VTX.

  8. Novel Zooming Scale Hough Transform Pattern Recognition Algorithm for the PHENIX Detector

    Science.gov (United States)

    Koblesky, Theodore

    2012-03-01

    Single ultra-relativistic heavy ion collisions at RHIC and the LHC and multiple overlapping proton-proton collisions at the LHC present challenges to pattern recognition algorithms for tracking in these high multiplicity environments. One must satisfy many constraints including high track finding efficiency, ghost track rejection, and CPU time and memory constraints. A novel algorithm based on a zooming scale Hough Transform is now available in Ref [1] that is optimized for efficient high speed caching and flexible in terms of its implementation. In this presentation, we detail the application of this algorithm to the PHENIX Experiment silicon vertex tracker (VTX) and show initial results from Au+Au at √sNN = 200 GeV collision data taken in 2011. We demonstrate the current algorithmic performance and also show first results for the proposed sPHENIX detector. [4pt] Ref [1] Dr. Dion, Alan. ``Helix Hough'' http://code.google.com/p/helixhough/

  9. The use and evolution of the CEA research reactors; Utilisation et evolution des reacteurs de recherche du C.E.A

    Energy Technology Data Exchange (ETDEWEB)

    Rossillon, F.; Chauvez, C. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1964-07-01

    retracent brievement l'histoire de ces reacteurs en montrant ce qu'a ete jusqu'a present leur utilisation, et comment certaines modifications ont permis de les adapter a l'evolution des programmes. Ils precisent egalement les raisons qui ont conduit a l'elaboration du projet de la nouvelle pile OSIRIS, La pile ZOE, la plus ancienne du CEA, est en service au Centre de Fontenay-aux-Roses depuis 1948. Elle est principalement utilisee pour les mesures de section efficace d'absorption du graphite, et pour diverses irradiations de courte duree ne necessitant que des flux peu eleves. La Pile EL2, en service depuis 1952, a permis les premieres etudes liees au refroidissement par gaz. Elle a ete tres utilisee pour la production des radioisotopes et pour de nombreuses experiences de physique, de metallurgie et de physico-chimie - le vieillissement de certaines parties du reacteur a conduit a decider l'arret prochain de cette installation. La Pile EL. 3 a ete tres utilisee pour les experiences de physique et pour l'etude des combustibles. L'adoption d'une nouvelle structure pour le coeur (solution 'Cristal de neige') va permettre d'accroitre considerablement les possibilites de la pile pour les irradiations en neutrons rapides. La pile TRITON-I, piscine de 2 MW, est surtout utilisee pour les irradiations en neutrons rapides et en gamma. Certaines modifications, actuellement en cours, permettront d'accroitre la puissance du reacteur jusqu'a 4 ou 5 MW. Dans un compartiment voisin de TRITON-I est implantee la Pile TRITON-II, de meme structure generale, mais dont la puissance maximum est de 100 kW. TRITON-II est utilisee exclusivement pour les etudes de protections. MELUSINE, pile piscine de 2 MW est en fonctionnement au Centre d'Etudes Nucleaires de Grenoble depuis 1959. Elle a permis l'execution d'un programme important concernant surtout la physique du solide, l'etude fondamentale de

  10. Timing and control requirements for a 32-channel AMU-ADC ASIC for the PHENIX detector

    Energy Technology Data Exchange (ETDEWEB)

    Emery, M.S.; Ericson, M.N.; Britton, C.L. Jr. [and others

    1998-02-01

    A custom CMOS Application Specific Integrated Circuit (ASIC) has been developed consisting of an analog memory unit (AMU) has been developed consisting of an analog memory unit (AMU) and analog to digital converter (ADC), both of which have been designed for applications in the PHENIX experiment. This IC consists of 32 pipes of analog memory with 64 cells per pipe. Each pipe also has its own ADC channel. Timing and control signal requirements for optimum performance are discussed in this paper.

  11. Open heavy flavor measurements in d+Au collisions at PHENIX experiment

    Directory of Open Access Journals (Sweden)

    Lim Sanghoon

    2014-04-01

    Full Text Available The heavy quarks produced in the early stage of heavy-ion collisions are very effective probes of the dense partonic medium produced at RHIC. PHENIX has the ability to measure heavy quark production through single electrons in the central arm spectrometers (|η| < 0.35 and single muons in the forward (backward muon spectrometers (1.2 < |η| < 2.2. As these single leptons are from open heavy-flavor meson semi-leptonic decays, initial state cold nuclear matter effects on heavy quark production can be probed by measuring the single leptons in d+Au collisions. PHENIX have observed a large enhancement of heavy-flavor electrons in d+Au collisions at mid-rapidity, which indicates strong CNM effects on heavy quark production, in contrast to the suppression observed in Au+Au collisions. Measurement of single muons from open heavy flavor in d+Au collisions at forward (backward rapidity provide detailed look into rapidity dependent CNM effects as well as the low (high x parton distribution function within Au nucleus. We discuss recent PHENIX heavy flavor measurements and how they expand our understanding of CNM effects and contribute to the interpretation of other results in heavy-ion collisions.

  12. Silicon Pixel Detector for the PHENIX experiment at the BNL RHIC

    CERN Document Server

    Ichimiya, Ryo; Akiba, Yasuyuki; Atomssa, Ermias; Chollet, Simon; Drapier, Olivier; En'yo, Hideto; Fujiwara, Kohei; Gastaldi, Franck; de Cassagnac, Raphael Granier; Kasai, Miki; Kurita, Kazuyosi; Kurosawa, Maki; Mannel, Eric J; Ohnishi, Hiroaki; Onuki, Yoshiyuki; Pak, Robart; Pancake, Charles; Sekimoto, Michiko; Shafto, Eugene; Sondheim, Walter; Taketani, Atsushi

    2008-01-01

    PHENIX is one of the major experiments at the Relativistic Heavy Ion Collider (RHIC) at the Brookhaven National Laboratory. It has been exploring the spin structure of the nucleon utilizing polarized proton-proton collisions and characteristics of the Quark Gluon Plasma (QGP) created in heavy ion collisions. The Silicon Vertex Tracker (VTX) will be implemented in 2010 to enhance physics capabilities. It will be installed very close to the collision point and will cover | \\eta | < 1.2 and | \\phi | ~2{\\pi} by four layers of silicon sensors. Inner two layers are silicon pixel detectors and outer two layers are silicon strip layers. In this paper, the inner silicon pixel detector is reported. We used 200 {\\mu}m thick silicon sensor and readout chip developed for ALICE experiment. As a part of PHENIX detector, it needs to be read out by four times faster from ALICE experiment and to be thin in material to minimize the radiation length. To meet the criteria, the PHENIX silicon pixel detector has been designed an...

  13. Design and Beam Test Results for the sPHENIX Electromagnetic and Hadronic Calorimeter Prototypes

    Energy Technology Data Exchange (ETDEWEB)

    Aidala, C.A.; et al.

    2017-04-05

    The sPHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) will perform high precision measurements of jets and heavy flavor observables for a wide selection of nuclear collision systems, elucidating the microscopic nature of strongly interacting matter ranging from nucleons to the strongly coupled quark-gluon plasma. A prototype of the sPHENIX calorimeter system was tested at the Fermilab Test Beam Facility as experiment T-1044 in the spring of 2016. The electromagnetic calorimeter (EMCal) prototype is composed of scintillating fibers embedded in a mixture of tungsten powder and epoxy. The hadronic calorimeter (HCal) prototype is composed of tilted steel plates alternating with plastic scintillator. Results of the test beam reveal the energy resolution for electrons in the EMCal is $2.8\\%\\oplus~15.5\\%/\\sqrt{E}$ and the energy resolution for hadrons in the combined EMCal plus HCal system is $13.5\\%\\oplus 64.9\\%/\\sqrt{E}$. These results demonstrate that the performance of the proposed calorimeter system is consistent with \\geant simulations and satisfies the sPHENIX specifications.

  14. Iterative model-building, structure refinement, and density modification with the PHENIX AutoBuild Wizard

    Energy Technology Data Exchange (ETDEWEB)

    Los Alamos National Laboratory, Mailstop M888, Los Alamos, NM 87545, USA; Lawrence Berkeley National Laboratory, One Cyclotron Road, Building 64R0121, Berkeley, CA 94720, USA; Department of Haematology, University of Cambridge, Cambridge CB2 0XY, England; Terwilliger, Thomas; Terwilliger, T.C.; Grosse-Kunstleve, Ralf Wilhelm; Afonine, P.V.; Moriarty, N.W.; Zwart, P.H.; Hung, L.-W.; Read, R.J.; Adams, P.D.

    2007-04-29

    The PHENIX AutoBuild Wizard is a highly automated tool for iterative model-building, structure refinement and density modification using RESOLVE or TEXTAL model-building, RESOLVE statistical density modification, and phenix.refine structure refinement. Recent advances in the AutoBuild Wizard and phenix.refine include automated detection and application of NCS from models as they are built, extensive model completion algorithms, and automated solvent molecule picking. Model completion algorithms in the AutoBuild Wizard include loop-building, crossovers between chains in different models of a structure, and side-chain optimization. The AutoBuild Wizard has been applied to a set of 48 structures at resolutions ranging from 1.1 {angstrom} to 3.2 {angstrom}, resulting in a mean R-factor of 0.24 and a mean free R factor of 0.29. The R-factor of the final model is dependent on the quality of the starting electron density, and relatively independent of resolution.

  15. PROPOSAL FOR A SILICON VERTEX TRACKER (VTX) FOR THE PHENIX EXPERIMENT

    Energy Technology Data Exchange (ETDEWEB)

    AKIBA,Y.

    2004-10-01

    We propose the construction of a Silicon Vertex Tracker (VTX) for the PHENIX experiment at RHIC. The VTX will substantially enhance the physics capabilities of the PHENIX central arm spectrometers. Our prime motivation is to provide precision measurements of heavy-quark production (charm and beauty) in A+A, p(d)+A, and polarized p+p collisions. These are key measurements for the future RHIC program, both for the heavy ion program as it moves from the discovery phase towards detailed investigation of the properties of the dense nuclear medium created in heavy ion collisions, and for the exploration of the nucleon spin-structure functions. In addition, the VTX will also considerably improve other measurements with PHENIX. The main physics topics addressed by the VTX are: (1) Hot and dense strongly interacting matter--(a) Potential enhancement of charm production, (b) Open beauty production, (c) Flavor dependence of jet quenching and QCD energy loss, (d) Accurate charm reference for quarkonium, (e) Thermal dilepton radiation, (f) High p{sub T} phenomena with light flavors above 10-15 GeV/c in p{sub T}, and (g) Upsilon spectroscopy in the e{sup +}e{sup -} decay channel. (2) Gluon spin structure of the nucleon--(a) {Delta}G/G with charm, (b) {Delta}G/G with beauty, and (c) x dependence of {Delta}G/G with {gamma}-jet correlations. (3) Nucleon structure in nuclei--Gluon shadowing over broad x-range.

  16. Le Tissu et le texte

    OpenAIRE

    Jean-Marie Lassus

    2010-01-01

    Le premier chapitre de La tumba del relámpago (1978) de l’écrivain péruvien Manuel Scorza synthétise une grande partie de la problématique de La guerra silenciosa, sa fresque de cinq romans racontant la lutte interminable des comuneros des Andes Centrales dans leur quête de justice et de reconnaissance, à partir de faits réels survenus dans le Pérou de la fin des années cinquante. Dans ce chapitre, la lecture du tissu de Doña Añada par Remigio Villena amène ce dernier à interpréter le dilemme...

  17. Le Sanskrit

    CERN Document Server

    Balbir, Nalini

    2013-01-01

    Cet ouvrage est destiné à tous ceux qui souhaitent se mettre ou se remettre à l'étude du sanskrit et ne peuvent y consacrer que quelques minutes par jour. En suivant le principe de la méthode quotidienne Assimil, vous acquerrez progressivement le vocabulaire et la grammaire de base qui sont nécessaires à la lecture des textes de la littérature sanskrite classique. Vous trouverez dans cette méthode une approche vivante de la langue et de la culture sanskrite classique à travers des textes d'abord adaptés pour le débutant puis authentiques. En quelques mois, vous manierez la langue sans efforts ni hésitation, de manière très naturelle. Les enregistrements reprennent l'intégralité des textes en sanskrit des leçons et des exercices de traduction du livre. Ils sont interprétés, à un rythme progressif, par des locuteurs natifs professionnels.

  18. TECHNICAL DESIGN REPORT FOR A NOSECONE CALORIMETER (NCC) FOR THE PHENIX EXPERIMENT.

    Energy Technology Data Exchange (ETDEWEB)

    PHENIX EXPERIMENT; OBRIEN,E.; BOOSE, S.; CHIU, M.; JOHNSON, B.M.; KISTENEV, E.P.; LYNCH, D.; NOUICER, R.; PAK, R.; PISANI, R.; STOLL, S.P.; SUKHANOV, A.; WOODY, C.L.; LI, Z.; RADEKA, V.; RESCIA, S.; (PHENIX EXPERIMENT COLLABORATORS)

    2007-08-01

    A remarkable result has emerged from the first several years of data taking at RHIC--the high temperature and density phase of QCD matter created in heavy ion collisions at RHIC is best described as a near perfect fluid--the strongly interacting Quark-Gluon-Plasma (sQGP). This state is characterized by a small viscosity to entropy ratio, and a high density of color charges which induces huge energy losses of partons transversing the medium. The task for the future is to understand the characteristics of the sQGP, and perhaps more importantly--to gain some insight into how and why such a medium is created. The PHENIX detector has been one of the primary experimental tools at RHIC; in particular the electromagnetic calorimeter has been a critical component of many of the measurements leading to this discovery. The coverage of the present PHENIX electromagnetic calorimeter is rather limited, covering half the azimuth and -0.35< {eta} <0.35 Further progress requires larger coverage of electromagnetic calorimetry, both to increase the rate for low cross section phenomena, and to cover a broader range of pseudorapidity to study the rapidity dependence of the medium. A pair of Nosecone Calorimeters (NCC) has been designed covering both positive and negative rapidity regions 1< |{eta}| <3 of the PHENIX detector. The NCC will make it possible to perform tomographic studies of the jet energy dependence of energy loss and medium response, by using direct photons as trigger particles over a large rapidity range. The technique of correlating trigger hadrons with low momentum hadrons has been powerfully exploited at RHIC to study the evolution of back to back jets [1, 2] and hence the response of the medium. The NCC will make it possible to do such studies using direct photons as the trigger particles. The direct photon in such ''photon-jet'' events tags the transverse momentum of outgoing parton which then fragments into lower energy particles. Together with

  19. RJH, a new test reactor in Europe; Le RJH - un nouveau reacteur d'essai en europe

    Energy Technology Data Exchange (ETDEWEB)

    Iracane, D. [CEA Saclay, Dir. de l' Energie Nucleaire (DEN), 91 - Gif sur Yvette (France)

    2005-07-01

    Material test reactors (MTR) are now ageing in Europe and they cannot secure the experimental needs over next decades. In this context, a new MTR, named Jules Horowitz reactor (RJH), operated as an international user-facility, is under development on the Cea's site of Cadarache (France). The design studies will end in 2007, the construction stage will follow and RJH commissioning is scheduled in 2014. Its construction costs are estimated to 500 million euros. RJH is a pool reactor of 100 MWth, its core will be inserted in a pressurized vessel with a primary circuit assuring water flow through forced convection. The core inlet-outlet temperature is about 25-40 Celsius degrees. RJH core is designed to use a high density - low enrichment UMo nuclear fuel (8 gU/cm{sup 3}, enrichment rate: 19.75%). Experimental devices located in the core will benefit from neutron fluxes ranging from 2.5 10{sup 14} n/cm{sup 2}.s to 5.10{sup 14} n/cm{sup 2}.s (E > 1 MeV). RJH is designed to manage simultaneously 10 experiments in the core and as many in the reflector. (A.C.)

  20. Caract\\'erisation de r\\'eacteurs photocatalytiques utilis\\'es pour le traitement de l'air

    CERN Document Server

    Faure, Marie; Corbel, Serge; Carré, Marie-Christiane; Gérardin, Fabien; Zahraa, Orfan

    2009-01-01

    Photocatalysis is often used in air purification. Photocatalytic degradation od VOC's has been investigated in a number of devices. An optimisation of this process requires a chracterisation of the reactor : in a first step the gas flow behaviour has to be studied (plug flow, CSTR,...) by RTD analysis; then, chemical kinetics have to be determined as a function ot the relevant parameters (space time, relative humidity, concentrations, etc). All the data collected lead to a reliable design of the equipment.

  1. Experimental study of the hydrodynamic instabilities occurring in boiling-water reactors; Etude experimentale des instabilites hydrodynamiques survenant dans les reacteurs nucleaires a ebullition

    Energy Technology Data Exchange (ETDEWEB)

    Fabreca, S. [Commissariat a l' Energie Atomique, Grenoble (France). Centre d' Etudes Nucleaires

    1964-10-01

    The subjects is an experimental out-of pile loop study of the hydrodynamic oscillations occurring in boiling-water reactors. The study was carried out at atmospheric pressure and at pressure of about 8 atmospheres, in channels heated electrically by a constant and uniform specified current. In the test at 8 atmospheres the channel was a round tube of approximately 6 mm interior diameter. At 1 atmosphere a ring-section channel was used, 10 * 20 mm in diameter, with an inner heating tube and an outer tube of pyrex. It was possible to operate with natural convection and also with forced convection with test-channel by-pass. The study consists of 3 parts: 1. Preliminary determination of the laws governing pressure-drop during boiling. 2. Determination of the fronts at which oscillation appears, within a wide range of the parameters involved. 3. A descriptive study of the oscillations and measurement of the periods. The report gives the oscillation fronts with natural and forced convection for various values of the singular pressure drop at the channel inlet and for various riser lengths. The results are presented in non-dimensional form, which is available, in first approximation, for all geometric scales and for all fluids. Besides the following points were observed: - the wall (nature and thickness) can be an important factor ; - oscillation can occur in a horizontal channel. (author) [French] II a ete effectue une etude experimentale, en boucle hors-pile, des oscillations hydrodynamiques survenant dans les reacteurs a ebullition. L'etude a ete effectuee a la pression atmospherique et a une pression voisine de 8 atmospheres dans des canaux chauffes electriquement a puissance imposee constante et uniforme. Dans les essais a 8 atmospheres le canal etait un tube circulaire de diametre interieur 6 mm environ. A 1 atmosphere le canal etait de section annulaire 10 * 20 mm avec un tube interieur chauffant et un tube exterieur en pyrex. Le fonctionnement etait possible

  2. Le vieillard et le chevalier

    Directory of Open Access Journals (Sweden)

    Mélanie JECKER

    2008-04-01

    Full Text Available Éléments introductifs Ces réflexions initiales n’auront pas pour point de départ le rappel du problème posé par la présence de vieillards toujours plus nombreux au sein de nos sociétés contemporaines. Je ne nie pas l’importance ni l’intérêt du phénomène relativement récent du vieillissement de la population en Occident, mais ce constat ne fut pas à l’origine de mon travail. Ce qui a porté ma curiosité vers le thème des âges de la vie n’est pas mon propre présent mais l’attrait et même, oserai...

  3. Processing Th C{sub 2} - UC{sub 2} fuel extracted from high temperature reactors HTGCR; Etude du traitement des combustibles Th C{sub 2} - UC{sub 2} issus de reacteurs a haute temperature

    Energy Technology Data Exchange (ETDEWEB)

    Derrien, C.; Lessart, P.; Pianezza, E.; Verry, C.; Villain, G. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1969-07-01

    The object of this investigation is solubilisation head-end (from crushing and grinding phase to non included first purification phase) of pulverulent ({sup 233}U/{sup 232}Th)C{sub 2} (200 - 500 microns diameter) contained in a graphite matrix extracted from a 4.10{sup 13} n.cm{sup -2}.s{sup -1} thermalized neutrons average flux with an irradiation of 80000 MWjT{sup -1} HTGCR reactor. After having succinctly described different bibliographic processes we have chosen the burn - leach of reactor fuel and graphite matrix containing it. The technology of burner is original in nuclear field and still more by utilizing ultra-sounds to intensify burning reaction and to minimize the weight of unburnables. The mixture of ThO{sub 2}, U{sub 3}O{sub 8}, and fission products oxides is solubilized by boiling HNO{sub 3} 13 M + HF 0.05 M. This process is profit-learning in a thorium recuperation and reprocessing point of view. In the contrary-case it would be interesting to consider a dry-process which would permit to separate solid ThF{sub 4} from gaseous UF{sub 6}. (authors) [French] Cette etude a pour objet le traitement initial de mise en solution ou 'head-end' (allant de la phase broyag-concassage a la phase de premiere purification exclue) d'un combustible ({sup 233}U/{sup 232}Th)C{sub 2} pulverulent (de 200 a 500 {mu} de diametre) contenu dans une matrice de graphite issu d'un reacteur HTGCR surgenerateur a neutrons thermiques de flux moyen 4. l0{sup 13} n.cm{sup -2}.s{sup -1} et taux d'irradiation 80000 MWjT{sup -1}. Apres exposition succincte des differents procedes bibliographiques decrits, nous avons finalement choisi le traitement par combustion-attaque ('Burn-Leach') du combustible et de la matrice etanche graphite qui le contient. La technologie du bruleur est originale dans le domaine nucleaire d'autant qu'elle utilise les ultra-sons pour ameliorer le rendement de la reaction de combustion et reduire au minimum le poids

  4. PHENIX Conceptual Design Report. An experiment to be performed at the Brookhaven National Laboratory Relativistic Heavy Ion Collider

    Energy Technology Data Exchange (ETDEWEB)

    Nagamiya, Shoji; Aronson, Samuel H.; Young, Glenn R.; Paffrath, Leo

    1993-01-29

    The PHENIX Conceptual Design Report (CDR) describes the detector design of the PHENIX experiment for Day-1 operation at the Relativistic Heavy Ion Collider (RHIC). The CDR presents the physics capabilities, technical details, cost estimate, construction schedule, funding profile, management structure, and possible upgrade paths of the PHENIX experiment. The primary goals of the PHENIX experiment are to detect the quark-gluon plasma (QGP) and to measure its properties. Many of the potential signatures for the QGP are measured as a function of a well-defined common variable to see if any or all of these signatures show a simultaneous anomaly due to the formation of the QGP. In addition, basic quantum chromodynamics phenomena, collision dynamics, and thermodynamic features of the initial states of the collision are studied. To achieve these goals, the PHENIX experiment measures lepton pairs (dielectrons and dimuons) to study various properties of vector mesons, such as the mass, the width, and the degree of yield suppression due to the formation of the QGP. The effect of thermal radiation on the continuum is studied in different regions of rapidity and mass. The e{mu} coincidence is measured to study charm production, and aids in understanding the shape of the continuum dilepton spectrum. Photons are measured to study direct emission of single photons and to study {pi}{sup 0} and {eta} production. Charged hadrons are identified to study the spectrum shape, production of antinuclei, the {phi} meson (via K{sup +}K{sup {minus}} decay), jets, and two-boson correlations. The measurements are made down to small cross sections to allow the study of high p{sub T} spectra, and J/{psi} and {Upsilon} production. The PHENIX collaboration consists of over 300 scientists, engineers, and graduate students from 43 institutions in 10 countries. This large international collaboration is supported by US resources and significant foreign resources.

  5. PHENIX Conceptual Design Report. An experiment to be performed at the Brookhaven National Laboratory Relativistic Heavy Ion Collider

    Energy Technology Data Exchange (ETDEWEB)

    Nagamiya, Shoji; Aronson, Samuel H.; Young, Glenn R.; Paffrath, Leo

    1993-01-29

    The PHENIX Conceptual Design Report (CDR) describes the detector design of the PHENIX experiment for Day-1 operation at the Relativistic Heavy Ion Collider (RHIC). The CDR presents the physics capabilities, technical details, cost estimate, construction schedule, funding profile, management structure, and possible upgrade paths of the PHENIX experiment. The primary goals of the PHENIX experiment are to detect the quark-gluon plasma (QGP) and to measure its properties. Many of the potential signatures for the QGP are measured as a function of a well-defined common variable to see if any or all of these signatures show a simultaneous anomaly due to the formation of the QGP. In addition, basic quantum chromodynamics phenomena, collision dynamics, and thermodynamic features of the initial states of the collision are studied. To achieve these goals, the PHENIX experiment measures lepton pairs (dielectrons and dimuons) to study various properties of vector mesons, such as the mass, the width, and the degree of yield suppression due to the formation of the QGP. The effect of thermal radiation on the continuum is studied in different regions of rapidity and mass. The e{mu} coincidence is measured to study charm production, and aids in understanding the shape of the continuum dilepton spectrum. Photons are measured to study direct emission of single photons and to study {pi}{sup 0} and {eta} production. Charged hadrons are identified to study the spectrum shape, production of antinuclei, the {phi} meson (via K{sup +}K{sup {minus}} decay), jets, and two-boson correlations. The measurements are made down to small cross sections to allow the study of high p{sub T} spectra, and J/{psi} and {Upsilon} production. The PHENIX collaboration consists of over 300 scientists, engineers, and graduate students from 43 institutions in 10 countries. This large international collaboration is supported by US resources and significant foreign resources.

  6. TGV32: A 32-channel preamplifier chip for the multiplicity vertex detector at PHENIX

    Energy Technology Data Exchange (ETDEWEB)

    Britton, C.L. Jr.; Ericson, M.N.; Frank, S.S. [and others

    1997-12-31

    The TGV32, a 32-channel preamplifier-multiplicity discriminator chip for the Multiplicity Vertex Detector (MVD) at PHENIX, is a unique silicon preamplifier in that it provides both an analog output for storage in an analog memory and a weighted summed-current output for conversion to a channel multiplicity count. The architecture and test results of the chip are presented. Details about the design of the preamplifier, discriminator, and programmable digital-analog converters (DACs) performance as well as the process variations are presented. The chip is fabricated in a 1.2-{micro}m, n-well, CMOS process.

  7. Hard probes at heavy-ion collider energies Results from PHENIX

    CERN Document Server

    D'Enterria, D G

    2002-01-01

    Hard processes in nucleus-nucleus interactions at relativistic energies are reviewed with emphasis on recent PHENIX results from the first run of the Relativistic Heavy-Ion Collider at BNL. The observed suppression of moderately high $p_T$ hadrons ($p_T$ = 2 - 5 GeV/c) in $\\sqrt{s_{NN}}$ = 130 GeV $Au+Au$ central collisions compared to the scaled $pp$ data, is discussed in terms of conventional nuclear and ``quark-gluon-plasma'' effects. The meson and baryon composition at high $p_T$, as well as the implications for open charm of the measured single electron spectrum are also presented.

  8. Results from Cu+Au collisions at 200 GeV in PHENIX Experiment

    Energy Technology Data Exchange (ETDEWEB)

    Berdnikov, Ya. A.; Kotov, D. O.; Safonov, A. S. [Federal State Autonomous Educational Institution of Higher Education “Saint-Petersburg State Polytechnical University” (Russian Federation); Ivanishchev, D. A.; Riabov, V. G.; Riabov, Yu. G.; Samsonov, V. M. [Petersburg Nuclear Physics Institute B.P. Konstantinov, National Research Centre “Kurchatov Institute” (Russian Federation)

    2016-01-22

    Collisions of asymmetric nuclei (Cu+Au) differ essentially from the case of symmetric nuclei (Cu+Cu, Au+Au) collisions in the geometry of overlap region. This leads to a number of consequences, which provide more absolute and accurate information about fundamental properties of matter under extreme conditions. Nuclear modification factors for π-mesons in Cu+Au interactions at 200 GeV were measured in PHENIX Experiment at RHIC. New experimental data on measurement of flows of different order (v{sub 1}, v{sub 2}) for light hadrons in Cu+Au interactions at 200 GeV will be discussed in this paper.

  9. Prompt Photon A_N with the PHENIX MPC-EX Detector

    CERN Document Server

    ,

    2013-01-01

    The PHENIX MPC-EX detector is a Si-W preshower extension to the existing Muon Piston Calorimeters (MPC). Covering the pseudorapidity range 3.1

  10. Study of Isospin Correlation in High Energy Heavy Ion Interactions with the RHIC PHENIX. Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Takahashi, Y.

    2003-06-08

    This report describes the research work performed under the support of the DOE research grant E-FG02-97ER4108. The work is composed of three parts: (1) Visual analysis and quality control of the Micro Vertex Detector (MVD) of the PHENIX experiments carried out of Brookhaven National Laboratory. (2) Continuation of the data analysis of the EMU05/09/16 experiments for the study of the inclusive particle production spectra and multi-particle correlation. (3) Exploration of a new statistical means to study very high-multiplicity of nuclear-particle ensembles and its perspectives to apply to the higher energy experiments.

  11. Depletion analysis and sensitivity study of PHENIX fuel-irradiation experiments

    Energy Technology Data Exchange (ETDEWEB)

    Biswas, D.; Kallfelz, J.M.; White, J.R.

    1981-01-01

    The experimental results are in the form of various U and Pu atom density ratios (R/sub E/) and burnup (BU) values. The results were for samples irradiated during the first three cycles in the central zone of PHENIX. The time-dependent sensitivity study was performed with the depletion generalized perturbation code DEPTH-CHARGE, to investigate the sensitivity of R/sub E/ to cross sections and to absolute flux level changes. The depletion analysis was performed using ENDS/B-IV data, an (R-Z) model, and the VENTURE Code system. 2 tables.

  12. PHENIX results on reconstructed jets in p + p and Cu + Au collisions

    Science.gov (United States)

    Timilsina, Arbin

    2016-12-01

    Measurements of jet production rates in p+p and Cu+Au collisions at √{sNN} = 200 GeV with the PHENIX detector are reported. Jets are reconstructed using the anti-kt algorithm with R = 0.2 from charged particles and electromagnetic clusters. The jet spectra are unfolded to correct for detector effects and underlying event background, and the resulting jet spectra are reported for the transverse momentum range 12 RCP) are presented as a function of pT and collision centrality. The results indicated that jets are suppressed by approximately a factor of two in the most central collisions.

  13. Production and performance of the silicon sensor and readout electronics for the PHENIX FVTX tracker

    Energy Technology Data Exchange (ETDEWEB)

    Kapustinsky, Jon Steven [Los Alamos National Laboratory

    2009-01-01

    The Forward Silicon Vertex Tracker (FVTX) upgrade for the PHENIX detector at RHIC will extend the vertex capability of the central PHENIX Silicon Vertex Tracker (VTX). The FVTX is designed with adequate spatial resolution to separate decay muons coming from the relatively long-lived heavy quark mesons (Charm and Beauty), from prompt particles and the longer-lived pion and kaon decays that originate at the primary collision vertex. These heavy quarks can be used to probe the high density medium that is formed in Au+Au collisions at RHIC. The FVTX is designed as two endcaps. Each endcap is comprised of four silicon disks covering opening angles from 10 to 35 degrees to match the existing muon arm acceptance. Each disk consists of p-on-n, silicon wedges, with ac-coupled mini-strips on 75 {micro}m radial pitch and proj ective length in the phi direction that increases with radius. A custom front-end chip, the FPHX, has been designed for the FVTX. The chip combines fast trigger capability with data push architecture in a low power design.

  14. Production and performance of the silicon sensor and custom readout electronics for the PHENIX FVTX tracker

    Energy Technology Data Exchange (ETDEWEB)

    Kapustinsky, Jon S., E-mail: jonk@lanl.go [Los Alamos National Laboratory, Mailstop H846, PO Box 1663, Los Alamos, 87545 New Mexico (United States)

    2010-05-21

    The Forward Silicon Vertex Tracker (FVTX) upgrade for the PHENIX detector at RHIC will extend the vertex capability of the central PHENIX Silicon Vertex Tracker (VTX). The FVTX is designed with adequate spatial resolution to separate decay muons coming from the relatively long-lived heavy quark mesons (Charm and Beauty), from prompt particles and the longer-lived pion and kaon decays that originate at the primary collision vertex. These heavy quarks can be used to probe the high-density medium that is formed in Au+Au collisions at RHIC. The FVTX is designed as two endcaps. Each endcap comprises four silicon disks covering opening angles from 10{sup o} to 35{sup o} to match the existing muon arm acceptance. Each disk consists of p-on-n, silicon wedges, with ac-coupled mini-strips on 75 {mu}m radial pitch and projective length in the phi direction that increases with radius. A custom front-end chip, the FPHX, has been designed for the FVTX. The chip combines fast trigger capability with data push architecture in a low-power design.

  15. Methods to improve track fit parameters in the PHENIX muon arms

    Science.gov (United States)

    Omiwade, Olusoji

    2003-10-01

    During the summer of 2003, several problems in the muon tracking chambers of the PHENIX experiment at Brookhaven National Lab needed to be fixed. This presentation discusses the needed software to help speed up the task of analyzing the data that were used to find broken cathode strips on one of the muon tracker stations. The inclusion of cathode strips that have been scratched or broken causes problems for chamber alignment issues and for correct track reconstruction. First we had to take the raw data obtained using the muon tracker calibration system, which sent pulses to selected anode wires through the high-voltage distributions system, and convert it into data that the CERN ROOT program could manipulate. Most of the work here will describe the set of software scripts that greatly reduced the amount of work required so that more time could be spent looking at the results of the analysis to improve other software. The ROOT macros and C++ programs written were essential for handling the job. This should result in more accurate tracking and better mass resolution for the muon arms in the PHENIX experiment.

  16. Silicon Vertex Tracker for PHENIX Upgrade at RHIC: Capabilities and Detector Technology

    CERN Document Server

    Nouicer, Rachid

    2008-01-01

    From the wealth of data obtained from the first three years of RHIC operation, the four RHIC experiments, BRAHMS, PHENIX, PHOBOS and STAR, have concluded that a high density partonic matter is formed at central Au+Au collisions at \\sqrt{s_{NN}} = 200 GeV. The research focus now shifts from initial discovery to a detailed exploration of partonic matter. Particles carrying heavy flavor, i.e. charm or beauty quarks, are powerful tool for study the properties of the hot and dense medium created in high-energy nuclear collisions at RHIC. They also allow to probe the spin structure of the proton in a new and precise way. An upgrade of RHIC (RHIC-II) is intended for the second half of the decade, with a luminosity increase to about 20-40 times the design value of 8 x 10^26 cm^-2 s^-1 for Au+Au, and 2 x 10^32 cm^-2 s^-1 for polarized proton beams. The PHENIX collaboration plans to upgrade its experiment to exploit with an enhanced detector new physics then in reach. For this purpose, we are constructing the Silicon V...

  17. A new detector at RHIC, sPHENIX goals and status

    Science.gov (United States)

    Reed, Rosi; sPHENIX Collaboration

    2017-01-01

    The study of heavy-ion collisions, which can create a new form matter, a nearly ideal strongly interacting fluid where quarks and gluons are no longer confined into nucleons, called Quark Gluon Plasma (QGP), is on the frontier of QCD studies. The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Lab (BNL) has had a long and successful program of QGP study since 2000, with many upgrades that have increased the delivered luminosity considerably in the last decade. The sPHENIX proposal is for a second generation experiment at RHIC, which will take advantage of the increased luminosity, and allow measurements of jets, jet correlations and Upsilons (ϒs), with a kinematic reach that will overlap with measurements made at the Large Hadron Collider (LHC). Complementary measurements at RHIC and at the LHC probe the QGP at different temperatures and densities, which are necessary to determine the temperature dependence of transport coefficients of the QGP. The sPHENIX detector will have large acceptance electromagnetic and hadronic calorimetry, as well as precision tracking, and high rate capability which are necessary for precision jet and ϒ observables. The experiment will enable a program of systematic measurements at RHIC, with a detector capable of acquiring a large sample of events in p+p, p+A, and A+A collisions. This proceedings outlines the key measurements enabled by the new detector, and status of the project itself.

  18. Low-mass Drift Chambers of the PHENIX central spectrometers at RHIC

    CERN Document Server

    Riabov, Y

    2002-01-01

    Beginning of regular operation of Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory opened unique possibilities for the study of nuclear matter at unprecedentedly high energies. PHENIX is one of the two large-scale experiments at RHIC, which is intended for detection and study of new state of matter--the so called quark-gluon plasma. The basic element of the PHENIX Central Tracking System is low-mass focusing Drift Chamber (DC). Distinctive features of ion-ion collisions at RHIC impose specific requirements on the DC which could not be satisfied by any structure developed earlier. DC should provide high efficiency of track reconstruction with use of 'hot' gas mixture under conditions of high charged particle densities, high collision rates and large-scale of the detector (6 m sup 3). Detailed description of the DC and its original wire structure characterized by the absence of left-right ambiguity and controlled charge collection geometry are given. Parameters of the DC during the first...

  19. Modeling of Phenix End-of-Life control rod withdrawal benchmark with DYN3D SFR version

    Energy Technology Data Exchange (ETDEWEB)

    Nikitin, Evgeny; Fridman, Emil [Helmholtz-Zentrum Dresden-Rossendorf e.V., Dresden (Germany). Reactor Safety

    2017-06-01

    The reactor dynamics code DYN3D is currently under extension for Sodium cooled Fast Reactor applications. The control rod withdrawal benchmark from the Phenix End-of-Life experiments was selected for verification and validation purposes. This report presents some selected results to demonstrate the feasibility of using DYN3D for steady-state Sodium cooled Fast Reactor analyses.

  20. PHENIX CDR update: An experiment to be performed at the Brookhaven National Laboratory relativistic heavy ion collider. Revision

    Energy Technology Data Exchange (ETDEWEB)

    1994-11-01

    The PHENIX Conceptual Design Report Update (CDR Update) is intended for use together with the Conceptual Design Report (CDR). The CDR Update is a companion document to the CDR, and it describes the collaboration`s progress since the CDR was submitted in January 1993. Therefore, this document concentrates on changes, refinements, and decisions that have been made over the past year. These documents together define the baseline PHENIX detector that the collaboration intends to build for operation at RHIC startup. In this chapter the current status of the detector and its motivation are briefly described. In Chapters 2 and 3 the detector and the physics performance are more fully developed. In Chapters 4 through 13 the details of the present design status, the technology choices, and the construction costs and schedules are presented. The physics goals of PHENIX collaboration have remained exactly as they were described in the CDR. Primary among these is the detection of a new phase of matter, the quark-gluon plasma (QGP), and the measurement of its properties. The PHENIX experiment will measure many of the best potential QGP signatures to see if any or all of these physics variables show anomalies simultaneously due to the formation of the QGP.

  1. Le savant et le politique

    Directory of Open Access Journals (Sweden)

    Philippe Corcuff

    2011-07-01

    Full Text Available L’article s’efforce de reproblématiser de manière équilibrée la question épistémologique du rapport entre le savant et le politique, en trois étapes. Tout d’abord, il revient sur les complications weberiennes concernant « la neutralité axiologique », en ce qu’elles sont éloignées du neutralisme unilatéral défendu par Nathalie Heinich. Ensuite, il va puiser dans des ressources philosophiques chez Maurice Merleau-Ponty et dans des ressources sociologiques chez Norbert Elias afin de traiter de manière nuancée les relations distanciation/engagement dans la perspective d’une distanciation compréhensive. Enfin, il termine par quatre propositions épistémologiques synthétiques valorisant une autonomie de l’activité scientifique émancipée du scientisme.The scientist and the politicsThis article attempts to problematize in a balanced way the epistemological question of the relationship between the scientist and the politics in three steps. At first, it will discuss the weberian complications regarding “axiological neutrality” in its remoteness to the unilateral neutralism defended by Nathalie Heinich. Then, it will seek within Maurice Merleau-Ponty’s philosophical resources and Norbert Elias’ sociological resources in order to treat with nuance the distanciation/engagement relationship from a comprehensive distancing perspective. At last, it will end with four synthetic epistemological proposals valuing autonomous scientific activity, emancipated from scientism.El intelectual y el políticoEl articulo hace hincapié en la necesidad de plantear de manera equilibrada el tema epistemológico de la relación entre el intelectual y el político. Puede efectuarse en tres etapas. En primer lugar el autor subraya la preocupación weberiana por la « neutralidad axiológica » en la medida en que es opuesta a la neutralidad unilateral de Nathalie Heinich. Seguidamente se apoya en los recursos filosóficos de Merleau

  2. Front-end module readout and control electronics for the PHENIX Multiplicity Vertex Detector

    Energy Technology Data Exchange (ETDEWEB)

    Ericson, M.N. [Oak Ridge National Lab., TN (United States); Allen, M.D. [Univ. of Tennessee, Knoxville, TN (United States); Boissevain, J. [Los Alamos National Lab., NM (United States)] [and others

    1997-11-01

    Front-end module (FEM) readout and control are implemented as modular, high-density, reprogrammable functions in the PHENIX Multiplicity Vertex Detector. FEM control is performed by the heap manager, an FPGA-based circuit in the FEM unit. Each FEM has 256 channels of front-end electronics, readout, and control, all located on an MCM. Data readout, formatting, and control are performed by the heap manager along with 4 interface units that reside outside the MVD detector cylinder. This paper discusses the application of a generic heap manager and the addition of 4 interface module types to meet the specific control and data readout needs of the MVD. Unit functioning, interfaces, timing, data format, and communication rates will be discussed in detail. In addition, subsystem issues regarding mode control, serial architecture and functions, error handling, and FPGA implementation and programming will be presented.

  3. Development of a front end controller/heap manager for PHENIX

    Energy Technology Data Exchange (ETDEWEB)

    Ericson, M.N.; Allen, M.D.; Musrock, M.S.; Walker, J.W.; Britton, C.L. Jr.; Wintenberg, A.L.; Young, G.R.

    1996-12-31

    A controller/heap manager has been designed for applicability to all detector subsystem types of PHENIX. the heap manager performs all functions associated with front end electronics control including ADC and analog memory control, data collection, command interpretation and execution, and data packet forming and communication. Interfaces to the unit consist of a timing and control bus, a serial bus, a parallel data bus, and a trigger interface. The topology developed is modular so that many functional blocks are identical for a number of subsystem types. Programmability is maximized through the use of flexible modular functions and implementation using field programmable gate arrays (FPGAs). Details of unit design and functionality will be discussed with particular detail given to subsystems having analog memory-based front end electronics. In addition, mode control, serial functions, and FPGA implementation details will be presented.

  4. A discriminator with a current-sum multiplicity output for the PHENIX multiplicity vertex detector

    Energy Technology Data Exchange (ETDEWEB)

    Smith, R.S.; Kennedy, E.J.; Jackson, R.G. [Univ. of Tennessee, Knoxville, TN (United States)

    1996-12-01

    A current output multiplicity discriminator for use in the front-end electronics (FEE) of the Multiplicity Vertex Detector (MVD) for the PHENIX detector at RHIC has been fabricated in the a 1.2-{micro} CMOS, n-well process. The discriminator is capable of triggering on input signals ranging from 0.25 MIP to 5 MIP. Frequency response of the discriminator is such that the circuit is capable of generating an output for every bunch crossing (105 ns) of the RHIC collider. Channel-to-channel threshold matching was adjustable to {+-} 4 mV. One channel of multiplicity discriminator occupied an area of 85 {micro} x 630 {micro} and consumed 515 {micro}W from a single 5-V supply. Details of the design and results from prototype device testing are presented.

  5. A 32-channel preamplifier chip for the multiplicity vertex detector at PHENIX

    Energy Technology Data Exchange (ETDEWEB)

    Britton, C.L. Jr.; Clonts, L.G.; Ericson, M.N.; Frank, S.S.; Moore, J.A.; Simpson, M.L.; Young, G.R. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6006 (United States); Smith, R.S. [Cadence Design Systems, Cary, North Carolina 27511 (United States); Boissevain, J.; Hahn, S.; Kapustinsky, J.S.; Simon-Gillo, J.; Sullivan, J.P.; van Hecke, H. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

    1999-03-01

    The TGV32, a 32-channel preamplifier{endash}multiplicity discriminator chip for the multiplicity vertex detector (MVD) at PHENIX, is a unique silicon preamplifier in that it provides both an analog output for storage in an analog memory and a weighted summed-current output for conversion to a channel multiplicity count. The architecture and test results of the chip are presented. Details about the design of the preamplifier, discriminator, and programmable digital{endash}analog converters performance as well as the process variations are presented. The chip is fabricated in a 1.2 {mu}m, {ital n}-well, complementary metal{endash}oxide{endash}semiconductor process. {copyright} {ital 1999 American Institute of Physics.}

  6. Design and performance of beam test electronics for the PHENIX Multiplicity Vertex Detector

    Energy Technology Data Exchange (ETDEWEB)

    Britton, C.L. Jr.; Bryan, W.L.; Emery, M.S. [and others

    1996-12-31

    The system architecture and test results of the custom circuits and beam test system for the Multiplicity-Vertex Detector (MVD) for the PHENIX detector collaboration at the Relativistic Heavy Ion Collider (RHIC) are presented in this paper. The final detector per-channel signal processing chain will consist of a preamplifier-gain stage, a current-mode summed multiplicity discriminator, a 64-deep analog memory (simultaneous read-write), a post-memory analog correlator, and a 10-bit 5 {mu}s ADC. The Heap Manager provides all timing control, data buffering, and data formatting for a single 256-channel multi-chip module (MCM). Each chip set is partitioned into 32-channel sets. Beam test (16-cell deep memory) performance for the various blocks will be presented as well as the ionizing radiation damage performance of the 1.2 {mu} n-well CMOS process used for preamplifier fabrication.

  7. FPHX: A New Silicon Strip Readout Chip for the PHENIX Experiment at RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Hoff, James R.; Zimmerman, Tom N.; Yarema, Raymond J.; /Fermilab; Kapustinsky, Jon S.; Brookes, Melynda L.; /LOS ALAMOS

    2009-01-01

    The FPHX chip is a silicon strip readout chip developed at Fermilab for use in the FVTX Detector of the PHENIX experiment at RHIC. Each front end consists of an integrator which is AC coupled to a shaper, followed by a discriminator and a 3-bit analog-to-digital converter. The backend is a novel architecture in two stages that permits dead-timeless operation and high-speed readout with very low latency. A slow controller provides an interface for all on-chip programmable functions. This chip has been fabricated in the 0.25um TSMC process. All functionality including the analog front-end, the digital back-end, and the slow controller has been verified experimentally.

  8. Phenix - a comprehensive python-based system for macromolecular structure solution

    Energy Technology Data Exchange (ETDEWEB)

    Terwilliger, Thomas C [Los Alamos National Laboratory; Hung, Li - Wei [Los Alamos National Laboratory; Adams, Paul D [UC BERKELEY; Afonine, Pavel V [UC BERKELEY; Bunkoczi, Gabor [UNIV OF CAMBRIDGE; Chen, Vincent B [DUKE UNIV; Davis, Ian [DUKE UNIV; Echols, Nathaniel [LBNL; Headd, Jeffrey J [DUKE UNIV; Grosse Kunstleve, Ralf W [LBNL; Mccoy, Airlie J [UNIV OF CAMBRIDGE; Moriarty, Nigel W [LBNL; Oeffner, Robert [UNIV OF CAMBRIDGE; Read, Randy J [UNIV OF CAMBRIDGE; Richardson, David C [DUKE UNIV; Richardson, Jane S [DUKE UNIV; Zwarta, Peter H [LBNL

    2009-01-01

    Macromolecular X-ray crystallography is routinely applied to understand biological processes at a molecular level. However, significant time and effort are still required to solve and complete many of these structures because of the need for manual interpretation of complex numerical data using many software packages, and the repeated use of interactive three-dimensional graphics. Phenix has been developed to provide a comprehensive system for crystallographic structure solution with an emphasis on automation of all procedures. This has relied on the development of algorithms that minimize or eliminate subjective input, the development of algorithms that automate procedures that are traditionally performed by hand, and finally the development of a framework that allows a tight integration between the algorithms.

  9. A CMOS variable gain amplifier for PHENIX electromagnetic calorimeter and RICH energy measurements

    Energy Technology Data Exchange (ETDEWEB)

    Wintenberg, A.L.; Simpson, M.L.; Young, G.R. [Oak Ridge National Lab., TN (United States); Palmer, R.L.; Moscone, C.G.; Jackson, R.G. [Tennessee Univ., Knoxville, TN (United States)

    1996-12-31

    A variable gain amplifier (VGA) has been developed equalizing the gains of integrating amplifier channels used with multiple photomultiplier tubes operating from common high-voltage supplies. The PHENIX lead-scintillator electromagnetic calorimeter will operate in that manner, and gain equalization is needed to preserve the dynamic range of the analog memory and ADC following the integrating amplifier. The VGA is also needed for matching energy channel gains prior to forming analog sums for trigger purposes. The gain of the VGA is variable over a 3:1 range using a 5-bit digital control, and the risetime is held between 15 and 23 ns using switched compensation in the VGA. An additional feature is gated baseline restoration. Details of the design and results from several prototype devices fabricated in 1.2-{mu}m Orbit CMOS are presented.

  10. Recent results on collective effects in small systems from PHENIX at RHIC

    CERN Document Server

    Campbell, Sarah

    2016-01-01

    Collisions of simple systems, such as $p$+$p$, or $p$+Nucleus have been used as benchmarks for our understanding of heavy ion collsions, since it was assumed they would be free of the effects from hot nuclear matter. Recently long range correlations and anisotropies of momentum spectra have been seen in such collisions, challenging this assumption. Such phenomena have been understood to be the result of the collective motion, which can best be described by hydrodynamics, whose initial conditions are set by the geometry of the colliding systems, together with their fluctuations. This talk will discuss the recent results from the PHENIX experiment at RHIC using a variety of colliding species ($p$+Au, $d$+Au, $^{3}$He+Au) that give a better understanding of the origin of the observed correlations and anisotropies, thus providing insight as to whether a quark gluon plasma is formed in these simple systems.

  11. Front-end module readout and control electronics for the PHENIX Multiplicity Vertex Detector

    Energy Technology Data Exchange (ETDEWEB)

    Ericson, M.N. [Oak Ridge National Lab., TN (United States); Allen, M.D. [Univ. of Tennessee, Knoxville, TN (United States); Boissevain, J. [Los Alamos National Lab., NM (United States)] [and others

    1997-11-01

    Front-end module (FEM) readout and control are implemented as modular, high-density, reprogrammable functions in the PHENIX Multiplicity Vertex Detector. FEM control is performed by the heap manager, an FPGA-based circuit in the FEM unit. Each FEM has 256 channels of front-end electronics, readout, and control, all located on an MCM. Data readout, formatting, and control are performed by the heap manager along with 4 interface units that reside outside the MVD detector cylinder. This paper discusses the application of a generic heap manager and the addition of 4 interface module types to meet the specific control and data readout needs of the MVD. Unit functioning, interfaces, timing, data format, and communication rates will be discussed in detail. In addition, subsystem issues regarding mode control, serial architecture and functions, error handling, and FPGA implementation and programming will be presented.

  12. PROPOSAL FOR A SILICON VERTEX TRACKER (VTX) FOR THE PHENIX EXPERIMENT.

    Energy Technology Data Exchange (ETDEWEB)

    AKIBA,Y.

    2004-03-30

    We propose the construction of a Silicon Vertex Tracker (VTX) for the PHENIX experiment at RHIC. The VTX will substantially enhance the physics capabilities of the PHENIX central arm spectrometers. Our prime motivation is to provide precision measurements of heavy-quark production (charm and beauty) in A+A, p(d)+A, and polarized p+p collisions. These are key measurements for the future RHIC program, both for the heavy ion program as it moves from the discovery phase towards detailed investigation of the properties of the dense nuclear medium created in heavy ion collisions, and for the exploration of the nucleon spin-structure functions. In addition, the VTX will also considerably improve other measurements with PHENIX. The main physics topics addressed by the VTX are: (1) Hot and dense strongly interacting matter--Potential enhancement of charm production; Open beauty production; Flavor dependence of jet quenching and QCD energy loss; Accurate charm reference for quarkonium; Thermal dilepton radiation; High p{sub T} phenomena with light flavors above 10-15 GeV/c in p{sub T}; and Upsilon spectroscopy in the e{sup +}e{sup -} decay channel. (2) Gluon spin structure of the nucleon--{Delta}G/G with charm; {Delta}G/G with beauty; and x dependence of {Delta}G/G with {gamma}-jet correlations. (3) Nucleon structure in nuclei--Gluon shadowing over broad x-range. With the present PHENIX detector, heavy-quark production has been measured indirectly through the observation of single electrons. These measurements are inherently limited in accuracy by systematic uncertainties resulting from the large electron background from Dalitz decays and photon conversions. In particular, the statistical nature of the analysis does not allow for a model-independent separation of the charm and beauty contributions. The VTX detector will provide vertex tracking with a resolution of <50 {micro}m over a large coverage both in rapidity (|{eta}| < 1.2) and in azimuthal angle ({Delta}{phi} {approx

  13. Le vieillard et le chevalier

    Directory of Open Access Journals (Sweden)

    Mélanie JECKER

    2010-05-01

    Full Text Available La fin du Moyen Âge fascine. Deux facteurs principaux expliquent l’attraction qu’exerce cette période : elle apparaît d’une part comme un moment historique riche car double, phase de transition entre le Moyen Âge et la Renaissance, où se mêlent des cadres de représentation anciens et nouveaux. L’insinuation d’une pensée humaniste balbutiante s’y traduirait notamment par l’émergence de la notion d’individu, qui constitue l’un des objets de ce travail. Il faut invoquer, d’autre part, l’image macabre d’un bas Moyen Âge hanté par l’idée de la maladie et de la mort depuis l’épidémie de peste noire de 1348, obsédé par la brièveté de la vie humaine. Ces deux facettes de « l’automne du Moyen Âge » tel que l’évoque avec poésie Joan Huizinga sont-elles autre chose qu’une plaisante image d’Epinal? Cette étude cherche précisément à déterminer le degré de validité de ces deux topiques, à travers l’analyse de la représentation des âges de la vie dans un corpus bien défini, celui de la biographie chevaleresque castillane du XVe siècle. L’intérêt porté à l’individu, la conscience de la singularité impliquent en effet celle du caractère mouvant de la personne, or quel thème mieux que celui des âges permet de confirmer ou d’infirmer l’hypothèse du surgissement d’une nouvelle manière de concevoir l’homme, proprement « renaissante », en ce siècle de transition , La nature même du corpus retenu – des récits biographiques – suggère en effet une mutation dans l’appréhension de la personne, une attention prêtée à sa progressive transformation. L’étude de la représentation de la vieillesse, en particulier, révèle non seulement à quel point était alors réelle cette prétendue obsession de la déchéance physique et de la mortalité, mais aussi dans quelle mesure étaient soulignés et valorisés les changements individuels parallèles à l

  14. Higher harmonics flow measurement of charged hadrons and electrons in wide kinematic range with PHENIX VTX tracker

    Energy Technology Data Exchange (ETDEWEB)

    Kurosawa, Maki

    2013-05-02

    The silicon vertex tracker (VTX) was installed into the PHENIX experiment in 2010 and it successfully collected approximately 5 billion events of Au + Au collisions at 200 GeV in the 2011 RHIC run. The main function of the VTX is separation of heavy flavor hadrons, charm and bottom, with a measurement of Distance of Closest Approach (DCA) of single electrons from heavy flavor decays. By identifying electrons with PHENIX central detectors, the azimuthal anisotropy of electrons from heavy flavor decays can be determined over a broad p{sub T} range. In this paper, we will present measurement results on v{sub 2} and v{sub 3} of charged hadrons, and v{sub 2} of single electron from charm decay.

  15. PHENIX Measurements of Single Electrons from Charm and Bottom Decays at Midrapidity in Au+Au Collisions

    CERN Document Server

    McGlinchey, D

    2015-01-01

    Heavy quarks are an ideal probe of the quark gluon plasma created in heavy ion collisions. They are produced in the initial hard scattering and therefore experience the full evolution of the medium. PHENIX has previously measured the modification of heavy quark production in Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV via electrons from semileptonic decays, which indicated substantial modifications of the parent hadron momentum distribution. The PHENIX barrel silicon vertex detector (VTX), installed in 2011, allows for the separation of electrons from charm and bottom hadron decays through the use of displaced vertex measurements. These proceedings present the results of the completed analysis of the 2011 data set using the VTX.

  16. Probing gluon polarization with pi0's in longitudinally polarized proton collisions at the RHIC-PHENIX experiment

    CERN Document Server

    Fukao, Y

    2005-01-01

    This report presents double helicity asymmetry in inclusive $\\pi^0$ production in polarized proton-proton collisions at a center-of-mass energy ($\\sqrt{s}$) of 200 GeV. The data were collected with the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC) during the 2004 run. The data are compared to a next-to-leading order perturbative quantum chromodynamic (NLO pQCD) calculation.

  17. Le roi est mort!: Vive le roi?

    Directory of Open Access Journals (Sweden)

    Urias Arantes

    1992-12-01

    Full Text Available Ce texte examine critiquement les points d'appui et propos philosophiques du projet culturel néomoderne (Habermas, Roùanet, interroge le lien avoué entre modernité et néomodernisme, le débat de celui-ci avec les irrationalismes post-modernes, explicite préssuppositions et inconsistances du projet néomoderne ainsi que ce que le néomodernisme laisse dans l'ombre dans son rachat de la modernité et ce que par conséquent il ne peut pas penser. Sous le fil conducteur de la critique du néomodernisme, on a souligné une sorte de "fuite en avant" qui serait le destin commun des intellectuels brésiliens, la possibilité et la limite de leur existence sociale.

  18. Systematic studies of the centrality dependence of soft photon production in Au+Au collision with PHENIX

    CERN Document Server

    Bannier, Benjamin

    2014-01-01

    Since the earliest days of Heavy Ion Physics thermal soft photon radiation emitted during the reaction had been theorized as a smoking gun signal for formation of a quark-gluon plasma and as a tool to characterize its properties. In recent years the existence of excess photon radiation in heavy ion collisions over the expectation from initial hard interactions has been confirmed at both RHIC and LHC energies by PHENIX and ALICE respectively. There the radiation has been found to exhibit elliptic flow $v_2$ well above what can currently be reconciled with a picture of early emission from a plasma phase. During the 2007 and 2010 Au+Au runs PHENIX has measured a high purity sample of soft photons down to $p_T>0.4\\,\\text{GeV}/c$ using an external conversion method. We present recent systematic studies by PHENIX from that sample on the centrality dependence of the soft photon yield, and elliptic and triangular flow $v_2$ and $v_3$ in Au+Au collisions which fill in the experimental picture and enable discrimination...

  19. Vernier Scan Analysis for PHENIX Run 15 p+p Collisions, √{ s} = 200 GeV

    Science.gov (United States)

    Ottino, Gregory; Phenix Collaboration

    2015-10-01

    In high energy nuclear physics, cross-section measurements are critical to form an understanding of particle production and they require a characterization of absolute integrated luminosity. The technique used by the PHENIX experiment for luminosity calculations is the Vernier Scan or Van Der Meer Scan. The scan consists of sweeping one beam across the other in the vertical and radial directions in the transverse plane, and then fitting the data of event rate vs. position to a 2D Gaussian distribution. The fit is analyzed to extract the overlap profile of the colliding bunches. The extracted widths, along with the number of protons, are used to calculate the luminosity, L . This, in turn, is used to calculate the p+p cross-section available to the minimum bias trigger, σBBC. Further analyses provide various correction factors that refine the measurements of rates and positions, improving the initial calculations of L . Final corrected measurement of σBBC is used to calculate integrated luminosity in any of the cross-section measurements with the relevant PHENIX data set. The current data set to be analyzed is from PHENIX Run 15 p+p collisions at √{ s} = 200 GeV.

  20. Silicon Vertex Tracker for PHENIX Upgrade at RICH: Capabilities and Detector Technology

    Science.gov (United States)

    Nouicer, R.

    From the wealth of data obtained from the first three years of RHIC operation, the four RHIC experiments, BRAHMS, PHENIX, PHOBOS and STAR, have concluded that a high density partonic matter is formed at central Au+Au collisions at sNN = 200 GeV. The research focus now shifts from initial discovery to a detailed exploration of partonic matter. Particles carrying heavy flavor, i.e. charm or beauty quarks, are powerful tool for study the properties of the hot and dense medium created in high-energy nuclear collisions at RHIC. At the relatively low transverse momentum region, the collective motion of the heavy flavor will be a sensitive signal for the thermalization of light flavors. They also allow to probe the spin structure of the proton in a new and precise way. An upgrade of RHIC (RHIC-II) is intended for the second half of the decade, with a luminosity increase to about 20-40 times the design value of 8 × 10^26 cm-2 s-1 for Au+Au, and 2 × 10^32 cm-2 s-1 for polarized proton beams. The PHENIX collaboration plans to upgrade its experiment to exploit with an enhanced detector new physics then in reach. For this purpose, we are constructing the Silicon Vertex Tracker (VTX). The VTX detector will provide us the tool to measure new physics observables that are not accessible at the present RHIC or available only with very limited accuracy. These include a precise determination of the charm production cross section, transverse momentum spectra at high-pT region for particles carrying beauty quarks as well the detection of recoil jets in direct photon production. The VTX detector consists of four layers of barrel detectors located in the region of pseudorapidity |η| < 1.2 and covers almost 2π azimuthal angle. The pseudorapidity, η, is defined as η = -ln[tan(θ/2)], where θ is the emission angle relative to the beam axis. The inner two silicon barrels consists of silicon pixel sensors and their technology is the ALICE1LHCb sensor-readout hybrid, which was developed

  1. Le Valais bilingue

    Directory of Open Access Journals (Sweden)

    Mathieu Petite

    2010-09-01

    Full Text Available Le Valais est l’un des trois cantons bilingues de la Suisse. 63 % de sa population parle le français dans la partie ouest du canton et 28 % l’allemand dans sa partie est. Ce « plurilinguisme de juxtaposition » (pour reprendre le terme d’André-Louis Sanguin dans sa Géographie politique de la Suisse soulève des questions politiques et sociales qu’ambitionne de traiter l’ouvrage des linguistes Iwar Werlen, Verena Tunger et Ursula Frei. Le constat auquel aboutit cette recherche sur le bilinguism...

  2. Le temps en images

    CERN Document Server

    Callender, Craig

    2014-01-01

    Qu'est-ce que le temps ? Le célèbre philosophe du Ve siècle, St Augustin, a dit qu'il savait ce qu'était le temps, tant que personne ne le lui demandait... Le temps est-il une quatrième dimension similaire à l'espace ou s'écoule-t-il dans un certain sens ? Et si le temps passe, est-il sensé de dire à quelle vitesse ? Est-ce que l'avenir existe ? Voyager dans le temps est-il possible ? Ce livre aborde ces questions et d'autres parmi les plus profondes et plus subtiles que l'on puisse se poser sur cette notion essentielle dans notre vie.

  3. Accurate macromolecular crystallographic refinement: incorporation of the linear scaling, semiempirical quantum-mechanics program DivCon into the PHENIX refinement package

    Energy Technology Data Exchange (ETDEWEB)

    Borbulevych, Oleg Y.; Plumley, Joshua A.; Martin, Roger I. [QuantumBio Inc., 2790 West College Avenue, State College, PA 16801 (United States); Merz, Kenneth M. Jr [University of Florida, Gainesville, Florida (United States); Westerhoff, Lance M., E-mail: lance@quantumbioinc.com [QuantumBio Inc., 2790 West College Avenue, State College, PA 16801 (United States)

    2014-05-01

    Semiempirical quantum-chemical X-ray macromolecular refinement using the program DivCon integrated with PHENIX is described. Macromolecular crystallographic refinement relies on sometimes dubious stereochemical restraints and rudimentary energy functionals to ensure the correct geometry of the model of the macromolecule and any covalently bound ligand(s). The ligand stereochemical restraint file (CIF) requires a priori understanding of the ligand geometry within the active site, and creation of the CIF is often an error-prone process owing to the great variety of potential ligand chemistry and structure. Stereochemical restraints have been replaced with more robust functionals through the integration of the linear-scaling, semiempirical quantum-mechanics (SE-QM) program DivCon with the PHENIX X-ray refinement engine. The PHENIX/DivCon package has been thoroughly validated on a population of 50 protein–ligand Protein Data Bank (PDB) structures with a range of resolutions and chemistry. The PDB structures used for the validation were originally refined utilizing various refinement packages and were published within the past five years. PHENIX/DivCon does not utilize CIF(s), link restraints and other parameters for refinement and hence it does not make as many a priori assumptions about the model. Across the entire population, the method results in reasonable ligand geometries and low ligand strains, even when the original refinement exhibited difficulties, indicating that PHENIX/DivCon is applicable to both single-structure and high-throughput crystallography.

  4. Cross-correlation of two detectors in a nuclear reactor; Intercorrelation de deux detecteurs dans un reacteur nucleaire

    Energy Technology Data Exchange (ETDEWEB)

    Dalfes, A.; Beliard, L.; Cazemajou, J.; Froelicher, B. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1967-07-01

    Auto and cross-correlation functions of signals given by neutron detectors situated in a subcritical nuclear reactor are determined by a numerical method. Values of the prompt neutrons decay constant obtained by means of the autocorrelation function of each detector and the cross-correlation function of the two detectors are compared to the reference value given by a classical pulsed neutrons measurement. Agreement between results seems to be satisfactory. (authors) [French] Les fonctions d'autocorrelation et d'intercorrelation des signaux issus de deux detecteurs de neutrons places dans un reacteur nucleaire sous critique sont determinees par une methode numerique. On compare les valeurs de la constante de decroissance des neutrons prompts donnees par les fonctions d'autocorrelation de chaque detecteur et la fonction d'intercorrelation des deux detecteurs au resultat de reference fourni par une manipulation dite de 'neutrons pulses'. L'accord entre les resultats parait satisfaisant. (auteurs)

  5. A multiplicity-vertex detector for the PHENIX experiment at RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Kapustinsky, J.; Boissevain, J. [Los Alamos National Lab., NM (United States); Bosze, E. [and others

    1997-06-21

    A multiplicity-vertex detector (MVD) has been designed, and is in construction for the PHENIX experiment at the relativistic heavy ion collider (RHIC). The 35 000 channel silicon detector is a two-layer barrel comprised of 112 strip detectors, and two disk-shaped endcaps comprised of 24 wedge-shaped pad detectors. The support structure of the MVD is very low mass, only 0.4% of a radiation length in the central barrel. The detector front-end electronics are a custom CMOS chip set containing preamplifier, discriminator, analog memory unit, and analog-to-digital converter. The system has pipelined acquisition, performs in simultaneous read/write mode, and is clocked by the 10 MHz beam crossing rate at RHIC. These die, together with a pair of commercial FPGAs that are used for control logic, are packaged in a multichip-module (MCM). The MCM will be fabricated in the high-density-interconnect (HDI) process. The prototype MCM design layout is described. (orig.).

  6. A CMOS Integrating Amplifier for the PHENIX Ring Imaging Cherenkov detector

    Energy Technology Data Exchange (ETDEWEB)

    Wintenberg, A.L.; Jones, J.P. Jr.; Young, G.R. [Oak Ridge National Lab., TN (United States); Moscone, C.G. [Tennessee Univ., Knoxville, TN (United States)

    1997-11-01

    A CMOS integrating amplifier has been developed for use in the PHENIX Ring Imaging Cherenkov (RICH) detector. The amplifier, consisting of a charge-integrating amplifier followed by a variable gain amplifier (VGA), is an element of a photon measurement system comprising a photomultiplier tube, a wideband, gain of 10 amplifier, the integrating amplifier, and an analog memory followed by an ADC and double correlated sampling implemented in software. The integrating amplifier is designed for a nominal full scale input of 160 pC with a gain of 20 mV/pC and a dynamic range of 1000:1. The VGA is used for equalizing gains prior to forming analog sums for trigger purposes. The gain of the VGA is variable over a 3:1 range using a 5 bits digital control, and the risetime is held to approximately 20 ns using switched compensation in the VGA. Details of the design and results from several prototype devices fabricated in 1.2 {micro}m Orbit CMOS are presented. A complete noise analysis of the integrating amplifier and the correlated sampling process is included as well as a comparison of calculated, simulated and measured results.

  7. Recent Heavy Flavor Results Utilizing the FVTX in PHENIX at RHIC

    CERN Document Server

    Li, Xuan

    2016-01-01

    Heavy flavor and quarkona production are important hard probes to test the Quantum Chromodynamics (QCD) and measure the properties of the Quark Gluon Plasma (QGP) created in high energy heavy ion collisions. The new PHENIX mid- and forward-rapidity silicon vertex detectors provide precise Distance of Closest Approach (DCA) determination, allowing charm and bottom yields identification, and improve di-muon mass resolution for charmonia studies. The relative $\\psi(2S)$ over $J/\\psi$(1S) yields measured in $p$+$p$, $p$+Al and $p$+Au data at $\\sqrt{s}=$200 GeV help us to understand final state effects on the charmonia production. Direct access to B-meson production has been enabled via measurements of non-prompt $J/\\psi \\to \\mu^{+} + \\mu^{-}$ in $p$+$p$ collisions at $\\sqrt{s} = 510$ GeV and Cu+Au collisions at $\\sqrt{s} = 200$ GeV. The fraction of B-meson decays in J/$\\psi$ yields in the $p$+$p$ measurement agrees with higher energy results from Tevatron and LHC. This fraction is enhanced in Cu+Au collisions sug...

  8. Recent Heavy-Flavor Results Utilizing the FVTX in PHENIX at RHIC

    Science.gov (United States)

    Li, Xuan; PHENIX Collaboration

    2017-01-01

    Heavy-flavor and quarkona production are important hard probes to test Quantum Chromodynamics (QCD) and measure the properties of the Quark Gluon Plasma (QGP) created in high energy heavy ion collisions. The new PHENIX mid- and forward-rapidity silicon vertex detectors provide precise Distance of Closest Approach (DCA) determination, allowing charm and bottom yields identi cation, and improve di-muon mass resolution for charmonia studies. The relative ψ(2S) over J/ψ (1S) yields measured in p+p, p+Al and p+Au data at help us to understand nal state effects on the charmonia production. Direct access to B-meson production has been enabled via measurements of non-prompt J/ψ → µ + + µ‑ in p+p collisions at and Cu+Au collisions at . The fraction of B-meson decays in J/ψ yields in the p+p measurement agrees with higher energy results from Tevatron and the LHC. This fraction is enhanced in Cu+Au collisions suggesting the B-meson yield is not modi ed by the medium whereas J/ψ is strongly suppressed.

  9. Direct jet reconstruction in p + p and Cu+ Cu collisions at PHENIX

    Science.gov (United States)

    Shi Lai, Yue

    2010-02-01

    Jet reconstruction in heavy ion collisions provides a direct measurement of the medium-induced parton energy loss and the in- medium fragmentation properties, and therefore can significantly enhance our understanding of the energy loss mechanism and medium property. However, the presence of a high multiplicity background prevents the direct application of traditional jet reconstruction techniques, which is e.g. known to give rise to a false apparent jet yield. Unlike at the LHC, the small jet cross section relative to the large background fluctuation makes the application to RHIC particularly difficult. We developed an algorithm that reconstructs jets using a Gaussian filter, which is both collinear/infrared safe and cone-like, but enhances the core versus periphery signal and therefore stabilizes the jet definition at the presence of a strongly fluctuating background and/or any detector aperture edges. This is then combined with a fake jet rejection strategy that can suppress the false background jet yield well below the jet production rate at RHIC. We show results from its application to the PHENIX p + p and Cu+ Cu data, including jet spectra, RAA, jet-jet correlations, and fragmentation functions. Their theoretical implications will be discussed. )

  10. Latest results of charged hadron flow measurements in CuAu collisions at RHIC-PHENIX

    Science.gov (United States)

    Nakagomi, Hiroshi

    2016-08-01

    Measurements of azimuthal anisotropic flow vn for inclusive charged hadrons and identified particles at mid rapidity in Cu+Au collisions at √sNN = 200GeV are presented. The data were recorded by the PHENIX experiment at Relativistic Heavy Ion Collider(RHIC). Directed, elliptic and triangular flow as a function of transverse momentum pT are measured with respect to event planes. The inclusive charged hadron vi shows the negative value at high pT. The v2 and v3 are compared to those in Au+Au and Cu+Cu collisions. We find the v 2 and v3 follow an empirical scaling with 1/(ɛnN1/3 part). We also compare the v2 and v3 to hydrodynamical predictions. The identified particles v2 and v3 show a mass ordering in low pT region and baryon and meson splitting in high pT region. However the identified hadron v1 only shows mass ordering in mid pT region.

  11. Phi Meson Production In Gold-gold Collisions At 200 Gev Measured By The Phenix Experiment At The Relativistic Heavy Ion Collider

    CERN Document Server

    Muniruzzaman, M

    2003-01-01

    The production and decay of the &phis; meson in relativistic heavy ion collisions is of considerable interest. An enhanced &phis; meson yield has been suggested as a signature for the formation of a deconfined phase. Furthermore, medium modifications of &phis; meson properties might be related to the expected chiral phase transition. In the year of 2001, the PHENIX experiment at RHIC has measured Au-Au collisions at SNN = 200 GeV. The trajectories and momenta of charged particles are measured with the PHENIX central arm tracking detectors. The additional velocity measurements from the high resolution Time-of-Flight detector as well as the broader acceptance Electromagnetic Calorimeter give PHENIX excellent capabilities to identify charged kaons. An excellent pair mass resolution of approximately 1.3 MeV was achieved for the combined systems. Results on the transverse mass distribution, the centrality dependence of the yield, inverse slope parameter, and the resonance and width of &phis; are...

  12. phenix.model_vs_data: a high-level tool for the calculation of crystallographic model and data statistics.

    Science.gov (United States)

    Afonine, Pavel V; Grosse-Kunstleve, Ralf W; Chen, Vincent B; Headd, Jeffrey J; Moriarty, Nigel W; Richardson, Jane S; Richardson, David C; Urzhumtsev, Alexandre; Zwart, Peter H; Adams, Paul D

    2010-08-01

    phenix.model_vs_data is a high-level command-line tool for the computation of crystallographic model and data statistics, and the evaluation of the fit of the model to data. Analysis of all Protein Data Bank structures that have experimental data available shows that in most cases the reported statistics, in particular R factors, can be reproduced within a few percentage points. However, there are a number of outliers where the recomputed R values are significantly different from those originally reported. The reasons for these discrepancies are discussed.

  13. DANS LE CONTEXTE IVOIRIEN

    African Journals Online (AJOL)

    LA RELATION "GENRE" ET SES IMPLICATIONS SOCIOLOGIQUES. DANS LE CONTEXTE IVOIRIEN ... de base et de la gestion des affaires publiques en milieu rural .... Les raisons économiques; du fait du faible pouvoir d'achat des parents face au ..... cause de rupture du contrat, toute femme a le droit de suspendre son.

  14. Avant le crime politique

    OpenAIRE

    Fell, Claude; Rutés, Sébastien

    2015-01-01

    La créativité récente dans le sous-genre policier au Mexique, que l’on appelle « néo-policier » favorise la mise en valeur des romans et nouvelles à caractère policier qui n’avaient pas dans ce pays le développement éditorial pris aux Etats-Unis. Le crime et l’enquête policière ont des composantes de fiction qui ne s’inscrivent pas dans le profil conventionnel du roman de détective. Des œuvres de plusieurs écrivains marquent cette évolution vers le néo-policier.Dans Ensayo de un crimen (1986)...

  15. Avant le crime politique

    OpenAIRE

    2015-01-01

    La créativité récente dans le sous-genre policier au Mexique, que l’on appelle « néo-policier » favorise la mise en valeur des romans et nouvelles à caractère policier qui n’avaient pas dans ce pays le développement éditorial pris aux Etats-Unis. Le crime et l’enquête policière ont des composantes de fiction qui ne s’inscrivent pas dans le profil conventionnel du roman de détective. Des œuvres de plusieurs écrivains marquent cette évolution vers le néo-policier.Dans Ensayo de un crimen (1986)...

  16. Detection of radioactive gases in the CO{sub 2} cooling the reactors G 2 - G 3; Detection des gaz radioactifs dans le CO{sub 2} de refroidissement des piles G2 - G3

    Energy Technology Data Exchange (ETDEWEB)

    Pouthier, J.; Rossi, J. [Commissariat a l' Energie Atomique, Chusclan (France). Centre de Production de Plutonium de Marcoule

    1968-07-01

    The carbon dioxide cooling the reactors G2 - G3 contains activation gases and fission gases. It is of interest to know their concentration, for example to be able to deduce rapidly the norms which would have to be applied in the case of an incident in the circuit. Gas-phase chromatography is applied daily for carrying out analyses. The chromatogram has separate peaks due to tritium, argon 41, krypton 85 and the 133 and 135 isotopes of xenon. By integrating each peak it is possible to calculate the specific activity of each product. The construction of an apparatus for carrying out continuous measurements is under consideration. (authors) [French] Le gaz carbonique, refroidissant les reacteurs G2 - G3, contient des gaz d'activation et des gaz de fission. Il est interessant de connaitre leur teneur par exemple pour etre en mesure de deduire rapidement les normes qu'il y aurait lieu d'appliquer en cas d'incidents sur le circuit. La methode de chromatographie en phase gazeuse est employee quotidiennement pour faire des analyses. Le chromatogramme se presente sous forme de pics distincts dus au tritium, a l'argon 41, au krypton 85 et aux isotopes 133 et 135 du xenon. L'integration de chaque pic permet de calculer l'activite specifique de chaque compose. Il est envisage de construire un appareil pour des mesures en continu. (auteurs)

  17. Decision-Making in Structure Solution using Bayesian Estimates of Map Quality: The PHENIX AutoSol Wizard

    Energy Technology Data Exchange (ETDEWEB)

    Terwilliger, T. C.; Adams, P. D.; Read, R. J.; McCoy, A. J.; Moriarty, Nigel W.; Grosse-Kunstleve, R. W.; Afonine, P. V.; Zwart, P. H.; Hung, L.-W.

    2009-03-01

    Estimates of the quality of experimental maps are important in many stages of structure determination of macromolecules. Map quality is defined here as the correlation between a map and the map calculated based on a final refined model. Here we examine 10 different measures of experimental map quality using a set of 1359 maps calculated by reanalysis of 246 solved MAD, SAD, and MIR datasets. A simple Bayesian approach to estimation of map quality from one or more measures is presented. We find that a Bayesian estimator based on the skew of histograms of electron density is the most accurate of the 10 individual Bayesian estimators of map quality examined, with a correlation between estimated and actual map quality of 0.90. A combination of the skew of electron density with the local correlation of rms density gives a further improvement in estimating map quality, with an overall correlation coefficient of 0.92. The PHENIX AutoSol Wizard carries out automated structure solution based on any combination of SAD, MAD, SIR, or MIR datasets. The Wizard is based on tools from the PHENIX package and uses the Bayesian estimates of map quality described here to choose the highest-quality solutions after experimental phasing.

  18. Tritium Retention and Permeation in Ion- and Neutron-Irradiated Tungsten under US-Japan PHENIX Collaboration

    Science.gov (United States)

    Shimada, Masashi; Taylor, Chase N.; Kolasinski, Robert D.; Buchenauer, Dean A.; Chikada, Takumi; Oya, Yasuhisa; Hatano, Yuji

    2015-11-01

    A critical challenge for long-term operation of ITER and beyond to a FNSF, a DEMO and future fusion reactor will be the development of plasma-facing components (PFCs) that demonstrate erosion resistance to intense heat and neutral/ion particle fluxes under the extreme fusion nuclear environment, while minimizing in-vessel inventories and ex-vessel permeation of tritium. Recent work at Tritium Plasma Experiment demonstrated that tritium diffuses in bulk tungsten at elevated temperatures, and can be trapped in radiation-induced trap site (up to 1 at. % T/W) in tungsten [M. Shimada, et.al., Nucl. Fusion 55 (2015) 013008]. US-Japan PHENIX collaboration (2013-2019) investigates irradiation response on tritium behavior in tungsten, and performs one-of-a-kind neutron-irradiation with Gd thermal neutron shield at High Flux Isotope Reactor, ORNL. This presentation describes the challenge in elucidating tritium behavior in neutron-irradiated PFCs, the PHENIX plans for neutron-irradiation and post irradiation examination, and the recent findings on tritium retention and permeation in 14MeV neutron-irradiated and Fe ion irradiated tungsten. This work was prepared for the U.S. Department of Energy, Office of Fusion Energy Sciences, under the DOE Idaho Field Office contract number DE-AC07-05ID14517.

  19. Le dernier Wittgenstein et le dernier Husserl sur le langage

    Directory of Open Access Journals (Sweden)

    Paul Ricoeur

    2014-07-01

    Full Text Available This article presents an edited version of lectures given by Paul Ricœur at Johns Hopkins University in April 1966. Ricœur offers a comparative analysis of Wittgenstein’s and Husserl’s late works, taking the problem of language as the common ground of investigation for these two central figures of phenomenology and analytic philosophy. Ricœur develops his study in two parts. The first part considers Husserl’s approach to language after the Logical Investigations and concentrates on Formal and Transcendental Logic; leaving a transcendental reflection on language behind it re-examines a phenomenological conception, according to which the sphere of logic is not separable from that of experience. The main focus of the second part is Wittgenstein’s later philosophy as it moved on from the conception of an isomorphic relation between language and the world, as set out in the picture theory in the Tractatus Logico-Philosophicus, to the more pragmatic notion of a language-game in the Philosophical Investigations. In order to get beyond the irrevocable differences between the two philosophies and the unresolved theoretical issues on both sides, Ricœur suggests turning to a semiological paradigm based on the Saussurean distinction between “language” and “speaking.” Keyword: Analytic Philosophy, Husserl, Phenomenology, Semiology, Wittgenstein.  Résumé Cet article est une version éditée de conférences données par Paul Ricœur à la Johns Hopkins University en avril 1966. Ricœur propose une analyse comparée des dernières œuvres de Wittgenstein et Husserl, avec le problème du langage comme sol commun d’investigations pour ces deux figures centrales de la phénoménologie et la philosophie analytique. Cette analyse de Ricœur se joue à travers deux parties. La première partie revient sur l'approche du langage chez Husserl depuis Recherches logiques avec une attention particulière aux développements de Logique formelle et

  20. Accurate macromolecular crystallographic refinement: incorporation of the linear scaling, semiempirical quantum-mechanics program DivCon into the PHENIX refinement package.

    Science.gov (United States)

    Borbulevych, Oleg Y; Plumley, Joshua A; Martin, Roger I; Merz, Kenneth M; Westerhoff, Lance M

    2014-05-01

    Macromolecular crystallographic refinement relies on sometimes dubious stereochemical restraints and rudimentary energy functionals to ensure the correct geometry of the model of the macromolecule and any covalently bound ligand(s). The ligand stereochemical restraint file (CIF) requires a priori understanding of the ligand geometry within the active site, and creation of the CIF is often an error-prone process owing to the great variety of potential ligand chemistry and structure. Stereochemical restraints have been replaced with more robust functionals through the integration of the linear-scaling, semiempirical quantum-mechanics (SE-QM) program DivCon with the PHENIX X-ray refinement engine. The PHENIX/DivCon package has been thoroughly validated on a population of 50 protein-ligand Protein Data Bank (PDB) structures with a range of resolutions and chemistry. The PDB structures used for the validation were originally refined utilizing various refinement packages and were published within the past five years. PHENIX/DivCon does not utilize CIF(s), link restraints and other parameters for refinement and hence it does not make as many a priori assumptions about the model. Across the entire population, the method results in reasonable ligand geometries and low ligand strains, even when the original refinement exhibited difficulties, indicating that PHENIX/DivCon is applicable to both single-structure and high-throughput crystallography.

  1. Tumelo le Moruo

    OpenAIRE

    Vuyani S. Vellem

    2015-01-01

    Paleng ya rona batho ba batsho, tumelo ya boKreste e fihlile lefatsheng la rona la Afrika Borwa mmoho le dikgoka tsa ditjhaba tsa boPhirima. BoKreste bo fihlile ka nako ya dintwa tseo mohopolo wa tsona e neng e le ho hapa lefatshe la, batho ba batsho. Ka mantswe amang, rona batho ba batsho, re ile ra qetella re le setjhaba se ileng sa hlolwa, mme lefatshe la rona la nkuwa ka dikgoka. Ka hare ho dikgoka tsena, ho ne ho dutse tumelo ya boKreste. Makgowa a ile are: �A re kwaleng mahlo re rapelen...

  2. Description of methods for making activation detectors for use in nuclear reactors; Description des procedes de fabrication des detecteurs d'activation utilises dans les reacteurs nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Barbalat, R.; Le Coguie, R.; Leger, P.; Salon, L.; Thierry, M. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1968-07-01

    A brief description of methods currently used for making activation detectors, thin films and various deposits used in nuclear reactors. The thicknesses required vary from about a few tenths of a micron to a few tenths of a millimeter. Different techniques are used for fixing the large variety of elements: rolling, moulding, painting, electrolysis, vacuum deposition, thin films, wires, enamels, protective linings, etc. (authors) [French] Expose succinct des procedes actuellement mis en oeuvre pour la realisation des detecteurs d'activation, feuilles minces et depots divers utilises dans les reacteurs nucleaires. La gamme des epaisseurs necessaires s'etendant approximativement des dixiemes de micrometre aux dixiemes de millimetre. La diversite des elements a fixer justifiant les techniques differentes selon les cas: laminage, moulage, peinture, electrolyse, depot sous vide, couches minces, fils, emaux, revetements protecteurs, etc. (auteurs)

  3. Le genre et le logiciel libre

    OpenAIRE

    Archambault, Jean-Pierre; Sedooka, Ayuko; Baron, Georges-Louis

    2010-01-01

    Le texte qui suit est fondé sur l'expérience d'une recherche menée sur les femmes et le logiciel libre depuis la fin 2009 auprès de la communauté des acteurs du libre en France. Il ne s'agit pas d'un texte scientifique à proprement parler mais d'une réflexion étayée par une série de contacts et de discussions avec des militants et des praticiens, qui vise à inciter à la discussion et au débat. Il est également fondé sur les résultats d'une enquête quantitative du projet européen PREDIL, port...

  4. Le rythme du silence

    OpenAIRE

    Meschonnic, Henri

    2017-01-01

    1. Pour rompre le silence Dire « rythme du silence », c’est non seulement penser le silence comme langage, et parfois la réalisation maximale du langage, mais aussi parcourir les acceptions de la notion de silence. De ce qui n’est pas dit, ou qu’on est incapable de dire à ce que les mots ne peuvent pas dire, le fameux indicible, mais aussi l’innommable, et la censure, faire silence sur, jusqu’au problème poétique. Il y a aussi une langue de bois du silence. Et aussi le silence de ce qu’on ent...

  5. Le corps chinois

    OpenAIRE

    2016-01-01

    Pour le xviiie siècle, le corps est encore une machine harmonique. Cette harmonie, c’est tout à la fois la marque divine à l’intérieur du corps, une loi de nature qui permet d’atteindre au bonheur, et une manière de définir l’état de santé. Le corps semble un appareillage soumis à des lois physiques : l’horloge, la fontaine et particulièrement l’instrument de musique. On trouve cette dernière image dans Bacon, en 1639, pour qui la Nature donne des tempéraments pour le corps, « comme la parfai...

  6. Le Jardin de Fleur

    Index Scriptorium Estoniae

    2008-01-01

    Ettevõtja Martin Reinsalu osalusel Marokosse kerkiv kuurortide kompleks Le Jardin de Fleur tunnistati CNBC Araabiamaade kinnisvaraarendusprojektide seas Maroko parimaks arendusprojektiks ning parimaks golfiarenduskeskuseks. Projekt toetub araabia arhitektuurile, mida on kombineeritud kaasaegse maroko disainiga

  7. Le Jardin de Fleur

    Index Scriptorium Estoniae

    2008-01-01

    Ettevõtja Martin Reinsalu osalusel Marokosse kerkiv kuurortide kompleks Le Jardin de Fleur tunnistati CNBC Araabiamaade kinnisvaraarendusprojektide seas Maroko parimaks arendusprojektiks ning parimaks golfiarenduskeskuseks. Projekt toetub araabia arhitektuurile, mida on kombineeritud kaasaegse maroko disainiga

  8. Le pique-nique

    Directory of Open Access Journals (Sweden)

    2009-04-01

    Full Text Available Cet ouvrage collectif dirigé par Francine Barthe-Deloizy est le résultat d’une démarche collective (24 auteurs associant des apports impromptus (appelés ici florilèges à un corpus thématique, fruit d’une recherche entreprise dans le cadre d’un atelier organisé par l’Institut Français des Recherches Iraniennes (IFRI, les services d’actions culturelles de l’ambassade de France en Iran et le laboratoire ENEC de l’Université Paris 4 Sorbonne. Le livre entreprend la généalogie d’une pratique qu...

  9. Storicizzare le teorie psicocritiche

    OpenAIRE

    Roberto Talamo

    2015-01-01

    Le teorie psicoanalitiche della letteratura, dopo una fase di alterne fortune, sono oggi praticate da una cerchia di adepti sempre più ristretta. Le nuove koinè critico-teoriche tendono infatti a relegare la dottrina freudiana all’interno di un sapere letterario (e non interpretativo) o a sostituire ad essa strumenti ritenuti più efficaci nella descrizione della sfera del mentale in letteratura (neuroestetica e neuronarratologia). La proposta storiografica che qui si avanza non vuole prendere...

  10. Le faussaire roman

    CERN Document Server

    D'Anna, Gianfranco

    2016-01-01

    À l'aube du XXIe siècle, le monde de la science est sur le point de vivre une révolution. Le jeune physicien allemand Albert Hendrick Thebell, des célèbres laboratoires de recherche B-Labs, à Summit, dans le New Jersey, publie, dans les plus grandes revues scientifiques internationales, une série d'articles dans lesquels il prétend avoir obtenu des résultats extraordinaires qui pourraient révolutionner les bases mêmes de la technologie. Rapidement, la communauté scientifique puis les médias saluent en lui un futur prix Nobel; on compare même son génie à celui d'Albert Einstein. Le progrès scientifique semble avoir franchi une étape décisive, susceptible d'amener un futur meilleur. Mais ces découvertes sont-elles authentiques ? Car pendant ce temps, dans les mêmeslaboratoires, des voix s'élèvent pour contester non seulement les théories de Thebell mais aussi la légitimité même de ses expériences ; certains le soupçonnent d'avoir combiné la plus grande fraude scientifique de tous l...

  11. LE RAPPORT JURIDIQUE

    Directory of Open Access Journals (Sweden)

    Nicolae Popa

    2008-01-01

    Full Text Available Lele du droit en tant qu’organisateur de la vie sociale, dans ses principales relations, ayant comme but de discipliner la conduite des hommes dans leur intersection quotidienne, est tout d’abord relevé – sur le plan abstrait et théorique – par les traits du mécanisme de la réglementation juridique, mécanisme dont le contour est tracé par l’existence du systčme normatif juridique, partie composante (sous-systčme du systčme normatif social. Le mécanisme de la réglementation de la vie sociale par des normes juridiques met en lumičre des aspects des plus variés, marquant l’influence du droit sur la société – aspects surtout juridiques, psychologiques etc. En męme temps, toutefois, lele du droit ne peut pas ętre limité tout simplement ŕ cette influence théorique. Dans sa derničre essence, le droit signifie vie, il offre un cadre spécifique ŕ la vie sociale, étant, dans cette lumičre, le résultat de la traduction, dans un langage technique, des formes et des structures de la vie sociale1. En tant qu’expression de certaines tendances, d’un certain systčme de valeurs, la loi garantit l’ordre, la stabilité sociale, la sécurité juridique. En pénétrant dans le tissu des rapports interhumains, les aspects sociologiques du mécanisme de la réglementation juridique ne peuvent pas échapper ŕ l’analyse. L’étude des rapports juridiques souligne tout justement ces aspects sociologiques, les rapports de droit étant, avant tout, des rapports sociaux, dans lesquels les hommes entrent afin de satisfaire leurs besoins variés, des rapports de coopération et de coexistence.

  12. The specifications of the European electricians for the conception of the future reactors; Le cahier des charges des electriciens europeens pour la conception des futurs reacteurs (les EUR)

    Energy Technology Data Exchange (ETDEWEB)

    Berbey, P. [Electricite de France, 92 - Clamart (France). Service Etudes et Projets Thermiques et Nucleaires

    2007-09-15

    The cooperation between European electricians through European utility requirements (E.U.R.) continues since the beginning of the 90. Transplanted initially on the program A.L.W.R., the E.U.R. project gradually managed to bring to the foreground a common specification for light water type reactors of 3. generation to be built in Europe. The nuclear safety was one of the major axes of development and the set of requirements of E.U.R. safety establishes one of European standard today. A continuous dialogue with the other actors of the nuclear power at the world level allowed to consolidate the proposed options. (N.C.)

  13. Physicochemical state of the spent fuel leaving the reactors; Le combustible nucleaire et son etat physico-chimique a la sortie des reacteurs

    Energy Technology Data Exchange (ETDEWEB)

    Dehaut, Ph

    2000-07-01

    This report focuses on the current knowledge, updated at the end of 1999, about the physicochemical state of the fuels leaving light water reactors, and particularly pressurized water reactors. Lessons are withdrawn from it making it possible to determine the points which require a necessary deepening of the data and coherence of interpretations. Lastly, evolution of the sailed fuel rod as well as the potential availability of gases and volatile fission products, during a secular storage or of a multi-millennium disposal, are the subject of an attempt at forecast. Accessible data in the scientific literature, or those acquired at the CEA, are particularly numerous. Their analysis and their synthesis are joined together to constitute a collection of references intended to the specialists in nuclear fuel and for all those which contribute to the reflexion on the storage or final disposal of the irradiated fuel. This memory is structured in ten chapters. The last chapter makes it possible to retain on some pages, the essential lessons of this study. Chapter I: Introduction; Chapter II: Characteristics of assemblies and fuels before irradiation; Chapter III: Transformations in reactor; Chapter IV: State of rods leaving the reactor; Chapter V: State of pellets; Chapter VI: Chemical and structural composition of the fuel; Chapter VII: Fuel fragmentation and density; Chapter VIII: Phenomena at the pellet periphery. Formation, characteristics and structure of the rim.Chemical interaction between pellet and cladding; Chapter IX: Location of fission gases and volatile fission products; Chapter X: Review, lessons and predictions. (authors)

  14. Analyse du transfert de chaleur et de la perte de pression pour des ecoulements supercritiques dans le reacteur CANDU-SCWR

    Science.gov (United States)

    Zoghlami, Sarra

    The supercritical water reactor is one of the six concepts of generation IV nuclear reactors that has been selected by the International Generation IV Forum (GIF). Canada has chosen to conduct advanced research on this type of reactor. For the design and safety analysis of the reactor concept, the development of numerical simulation codes is needed. The ARTHUR code is a thermal-hydraulic computer code developed by Fassi-Fehri (2008), at the Ecole Polytechnique de Montreal, to analyse the CANDU-6 reactor. The purpose of this project is to modify this numerical code so that it can be used to treat the CANDU-SCWR. To calculate the coolant thermal-hydraulics properties in the fuel channel of a CANDU-SCWR, it was assumed that the water flows under supercritical conditions is a one-phase flow. Thus within this code, we developed the conservation equations for one-phase flow. Hydraulic resistance and heat transfer at supercritical pressure are two important aspects to be considered in the modeling of a fuel channel in a nuclear reactor. To choose the accurate correlation to predict the pressure friction factor, we compared numerical calculations, using different correlations found in literature, to experimental data. We concluded that the Garimella (2008) correlation is the most consistent, to be incorporated in the ARTHUR &barbelow;SCWR code. We proved that the choice of the friction factor correlation affects slightly the distribution of thermal-hydraulic properties in the fuel channel. Under supercritical conditions, water thermal-physical properties are characterized by significant variations in the pseudo-critical region. This behavior influences the forced convection heat transfer phenomena. To choose the adequate correlation to calculate the forced convection heat transfer coefficient, we compared numerical results to experimental data, and we found that the standard deviation given by Mokry et al. (2010) correlation is the lowest. In order to model the fuel channel, some geometrical simplifications are made. In fact, we assumed that the coolant flow in the fuel channel is represented by the flow around the fuel rod, bounded by the first crown. This simplified model was used for neutronic/thermal-hydraulic coupled calculation performed with neutronic codes DRAGON/DONJON (Varin et al., 2005), to analyse the thermal-hydraulic behavior of the fuel channel in CANDU-SCWR. We observed that the coolant density at the fuel rod external surface, at the sixth fuel bundle is 3.5 times lower than the average coolant density in the fuel channel. This puts into question the assumption of considering the supercritical water flow as an homogeneous flow and the ability to build a supercritical water nuclear reactor in CANDU type, i.e., with horizontal fuel channels. In order to validate ARTHUR &barbelow;SCWR code, we compared our results to SUBCHAN code (Jiang et al., 2009), which is a thermal-hydraulic code developed to analyze CANDU-SCWR. Both codes give the same shapes and orders of magnitude for the coolant average temperature and the cladding-surface temperature. The axial distribution of the centerline temperature in the fuel rod is different. This is due to the fact that the calculations performed by the SUBCHAN code are not coupled to a neutronic code. For this reason, the thermal power distributions differs in the two codes. The variation of the mass flow influences the forced convective heat transfer, so, the distribution of thermal-physical properties in the channel. In fact, if the mass flow is reduced by 50% compared to the nominal mass flow rate, following a pump failure, the external fuel rod surface temperature exceeds the melting point, which is between 1400°C and 1455°C. This phenomenon may results in the radioactive contamination of the environment.

  15. The ISRN has stated on the CABRI reactor restarting; L'IRSN a donne son avis sur le redemarrage du reacteur CABRI

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-07-01

    This paper presents the different issues examined by the ISRN (the French Institute of Radioprotection and Nuclear Safety) for the restarting of the pool type research CABRI reactor which is briefly described in appendix. These issues are: the design, realisation and monitoring of the new pressurised water test loop, the reassessment of the protection system limiting the reactivity injection during tests, inspection of fuel pencil condition, reassessment of safety studies, inspection of the condition of existing equipment which are essential for safety, reassessment of the seismic risk and of the fire risk, reassessment of operation conditions (personal radioprotection, human and organisational factors). An appendix contains the report by the Permanent Group of Experts for Nuclear Reactors with its recommendations.

  16. Electric failure on the reactor n.3 of the nuclear power plant of Dampierre; Defaillance electrique sur le reacteur n. 3 de la centrale nucleaire de Dampierre

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-05-15

    This note of information resumes the progress of the electric failure on the reactor n.3 of the nuclear power plant of Dampierre, the organization during the incident, it establishes then a comparison with the incident arisen to Forsmark in 2006 and reminds that it lead in an inspection on behalf of the Asn which noticed that all the procedures had been respected by the operators and did not noticed any abnormality in the maintenance. This event was classified at the level 1 of the international nuclear event scale (INES). (N.C.)

  17. Engine jet entrainment in the near field of an aircraft; Entrainement du jet d`un reacteur dans le champ aerodynamique proche d`un avion

    Energy Technology Data Exchange (ETDEWEB)

    Garnier, F.; Jacquin, L.; Laverdant, A.

    1997-12-31

    A simplified approach has been applied to analyse the mixing and entrainment processes of the engine exhaust through their interaction with the vortex wake of an aircraft. Our investigation is focused on the near field, extending from exit nozzle to the beginning of the vortex phase (i.e. to about twenty seconds after the wake is generated). This study is performed using an integral model and a numerical simulation for a two engine large civil aircraft. The properties of the wing-tip vortices on the calculation of the dilution ratio (defined as a tracer concentration) have been shown. The mixing process is also affected by the buoyancy effect, but only after the jet regime, when the trapping in the vortex core has occurred. Qualitative comparison with contrail photography shows similar features. Finally the distortion and stretching of the plume streamlines inside the vortices can be observed, and the role of the descent of the vortices on the maximum tracer concentration has been discussed. (author) 19 refs.

  18. Calculation system for physical analysis of boiling water reactors; Modelisation des phenomenes physiques specifiques aux reacteurs a eau bouillante, notamment le couplage neutronique-thermohydraulique

    Energy Technology Data Exchange (ETDEWEB)

    Bouveret, F

    2001-07-01

    Although Boiling Water Reactors generate a quarter of worldwide nuclear electricity, they have been only little studied in France. A certain interest now shows up for these reactors. So, the aim of the work presented here is to contribute to determine a core calculation methodology with CEA (Commissariat a l'Energie Atomique) codes. Vapour production in the reactor core involves great differences in technological options from pressurised water reactor. We analyse main physical phenomena for BWR and offer solutions taking them into account. BWR fuel assembly heterogeneity causes steep thermal flux gradients. The two dimensional collision probability method with exact boundary conditions makes possible to calculate accurately the flux in BWR fuel assemblies using the APOLLO-2 lattice code but induces a very long calculation time. So, we determine a new methodology based on a two-level flux calculation. Void fraction variations in assemblies involve big spectrum changes that we have to consider in core calculation. We suggest to use a void history parameter to generate cross-sections libraries for core calculation. The core calculation code has also to calculate the depletion of main isotopes concentrations. A core calculation associating neutronics and thermal-hydraulic codes lays stress on points we still have to study out. The most important of them is to take into account the control blade in the different calculation stages. (author)

  19. New rules for the interventions on the primary circuit of nuclear reactors; Nouvelles regles pour les interventions sur le circuit primaire des reacteurs electronucleaires

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-13

    This decision from the French authority of nuclear safety (ASN) concerns the enforcement of new technical rules relative to the maintenance activities performed on the primary circuit of Electricite de France (EdF) reactors. Different levels of intervention are considered: non noticeable interventions internally carried out by EdF with a simple information given to the ASN, noticeable interventions prepared and performed by EdF under the control of the regional directions of industry, research and environment (DRIRE), and important interventions requiring a qualification dossier validated by the bureau of nuclear boilers control (BCCN). The details of the procedure are given in the attached note. (J.S.)

  20. The sea water desalination by the nuclear reactors; Le dessalement de l'eau de mer par les reacteurs nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Nisan, S. [CEA Cadarache, Dir. du Developpement et de l' Innovation Nucleares DDIN, 13 - Saint-Paul-lez-Durance (France)

    2002-07-01

    This document underlines the importance of water shortage in many areas in the world in the future. The water sea desalination can be a efficient solution to this problem. The desalination methods are presented. In this context the desalination reactors appear as a competitive solution, facing the fossil energies systems not only for the simultaneous electric power and drinking water production, but also for the minimization of greenhouse gases. (A.L.B.)

  1. Le modèle basque

    Directory of Open Access Journals (Sweden)

    Juan-Angel PORTUGAL

    1986-12-01

    Full Text Available À l'intérieur du quadrilatère basque se dessine un sous-espace triangulaire dont les sommets sont les capitales provinciales; les côtés délimitent une aire prospère. La localisation de ces trois noyaux résulte d'une décision politico-économique et d'une diffusion de l'industrialisation. Ce triangle est un espace dynamique et attractif, autant dans le domaine de la démographie que du développement économique et industriel.

  2. Tumelo le Moruo

    Directory of Open Access Journals (Sweden)

    Vuyani S. Vellem

    2015-03-01

    Full Text Available Paleng ya rona batho ba batsho, tumelo ya boKreste e fihlile lefatsheng la rona la Afrika Borwa mmoho le dikgoka tsa ditjhaba tsa boPhirima. BoKreste bo fihlile ka nako ya dintwa tseo mohopolo wa tsona e neng e le ho hapa lefatshe la, batho ba batsho. Ka mantswe amang, rona batho ba batsho, re ile ra qetella re le setjhaba se ileng sa hlolwa, mme lefatshe la rona la nkuwa ka dikgoka. Ka hare ho dikgoka tsena, ho ne ho dutse tumelo ya boKreste. Makgowa a ile are: �A re kwaleng mahlo re rapeleng, rona ra kwala mahlo, mme ha re qeta hore Amen, re bula mahlo, ra fumana lefatshe le nkuwe matsohong a rona ho setse Bibele.� Re ile ra sala le Bibele eo ka yona re lekileng dilemong tse fitileng ho lwana ntwa ya topollo, kapa tokoloho hofihlela selemong sa 1994. Le ha re ile ra fumana tokoloho ka selemo seo, hare so ka re lokoloha ho tsa moruo. E kaba sena se bolela eng mabapi le tumelo ya rona ya boKreste? Segolweng sena re leka ho araba potso ena. Tumelo ke eng ho batho ba sa lokolohang moruong wa naha ya bona? Re lekola pale ya boKreste, tumelo ya batho le maemo a kereke ntlheng ya ho tadimana le tokoloho ka tumelo.Faith and economics. In our history from a black perspective, Christianity arrived through violent conquest from the west. Evidentially, this faith coincided with wars of dispossession and the ultimate defeat of black Africans. It is difficult to separate the violent defeat of black Africans from the arrival of Christian faith. This well-known statement within the circles of black Theology of liberation: When the white man arrived in our land he said, �let us pray and after prayer, when we opened our eyes, our land was taken and only the Bible was left in our hands,� captures the black sentiment of this history. Ironically, it was this Bible that black Africans used to wage their struggle for liberation up to the demise of apartheid in 1994.Nonetheless, political liberation is not enough as the struggle for economic liberation

  3. The Measurement of Transverse Single Spin Asymmetry of Forward Charged Hadrons in the PHENIX experiment at RHIC

    Science.gov (United States)

    Wei, Feng

    2010-02-01

    The measurement of transverse single spin asymmetries provides an opportunity to probe the parton structure of transversely polarized nucleons. We present PHENIX preliminary results of transverse single spin asymmetries of non-identified charged hadrons measured in the muon spectrometers (1.2 Brahms experiment, which has made these measurements in the past. At lower xF we can study the turn-on of the asymmetry as a function of xF, and the crossover region between pQCD and TMD factorization is at higher pT. Perturbative QCD predicts that the asymmetry should decrease as 1/pT. For this purpose we also show the pT dependent asymmetry in a very narrow xF range around the turn-on region. )

  4. Formation of dense partonic matter in relativistic nucleus-nucleus collisions at RHIC: Experimental evaluation by the PHENIX collaboration

    CERN Document Server

    Adcox, K; Ajitanand, N N; Akiba, Y; Alexander, J; Aphecetche, L; Arai, Y; Aronson, S H; Averbeck, R; Awes, T C; Barish, K N; Barnes, P D; Barrette, J; Bassalleck, B; Bathe, S; Baublis, V; Bazilevsky, A; Belikov, S V; Bellaiche, F G; Belyaev, S T; Bennett, M J; Berdnikov, Yu A; Botelho, S S; Brooks, M L; Brown, D S; Bruner, N L; Bucher, D; Büsching, H; Bumazhnov, V A; Bunce, G M; Burward-Hoy, J M; Butsyk, S; Carey, T A; Chand, P; Chang, J; Chang, W C; Chavez, L L; Chernichenko, S K; Chi, C Y; Chiba, J; Chiu, M; Choudhury, R K; Christ, T; Chujo, T; Chung, M S; Chung, P; Cianciolo, V; Cole, B A; D'Enterria, D G; Dávid, G; Delagrange, H; Denisov, A; Deshpande, A A; Desmond, E J; Dietzsch, O; Dinesh, B V; Drees, A; Durum, A A; Dutta, D; Ebisu, K; Efremenko, Yu V; El-Chenawi, K F; Enyo, H; Esumi, S C; Ewell, L A; Ferdousi, T; Fields, D E; Fokin, S L; Fraenkel, Zeev; Franz, A; Frawley, A D; Fung, S Y; Garpman, S; Ghosh, T K; Glenn, A; Godoi, A L; Goto, Y; Greene, S V; Grosse-Perdekamp, M; Sen-Gupta, S K; Guryn, W; Gustafsson, Hans Åke; Haggerty, J S; Hamagaki, H; Hansen, A G; Hara, H; Hartouni, E P; Hayano, R S; Hayashi, N; He, X; Hemmick, T K; Heuser, J M; Hill, J C; Ho, D S; Homma, K; Hong, B; Hoover, A; Ichihara, T; Imai, K; Ippolitov, M S; Ishihara, M; Jacak, B V; Jang, W Y; Jia, J; Johnson, B M; Johnson, S C; Joo, K S; Kametani, S; Kang, J H; Kann, M; Kapoor, S S; Kelly, S; Khachaturov, B A; Khanzadeev, A V; Kikuchi, J; Kim, D J; Kim, H J; Kim, S Y; Kim, Y G; Kinnison, W W; Kistenev, E P; Kiyomichi, A; Klein-Bösing, C; Klinksiek, S A; Kochenda, L M; Kochetkov, D; Kochetkov, V; Köhler, D; Kohama, T; Kozlov, A; Kroon, P J; Kurita, K; Kweon, M J; Kwon, Y; Kyle, G S; Lacey, R A; Lajoie, J G; Lauret, J; Lebedev, A; Lee, D M; Leitch, M J; Li, X H; Li, Z; Lim, D J; Liu, M X; Liu, X; Liu Zu Ping; Maguire, C F; Mahon, J R; Makdisi, Y I; Man'ko, V I; Mao, Y; Mark, S K; Markacs, S; Martínez, G; Marx, M D; Masaike, A; Matathias, F; Matsumoto, T; McGaughey, P L; Melnikov, E A; Merschmeyer, M; Messer, F; Messer, M; Miake, Y; Miller, T E; Milov, A M; Mioduszewski, S; Mischke, R E; Mishra, G C; Mitchell, J T; Mohanty, A K; Morrison, D P; Moss, J M; Muhlbacher, F; Muniruzzaman, M; Murata, J; Nagamiya, S; Nagasaka, Y; Nagle, J L; Nakada, Y; Nandi, B K; Newby, J; Nikkinen, L; Nilsson, P O; Nishimura, S; Nyanin, A S; Nystrand, J; O'Brien, E; Ogilvie, C A; Ohnishi, H; Ojha, I D; Ono, M; Onuchin, V A; Oskarsson, A; Österman, L; Otterlund, I; Oyama, K; Paffrath, L; Palounek, A P T; Pantuev, V S; Papavassiliou, V; Pate, S F; Peitzmann, Thomas; Petridis, A; Pinkenburg, C H; Pisani, R P; Pitukhin, P; Plasil, F; Pollack, M E; Pope, K; Purschke, M L; Ravinovich, I; Read, K F; Reygers, K; Riabov, V; Riabov, Y; Rosati, M; Rose, A A; Ryu, S S; Saitô, N; Sakaguchi, A; Sakaguchi, T; Sako, H; Sakuma, T; Samsonov, V; Sangster, T C; Santo, R; Sato, H D; Sato, S; Sawada, S; Schlei, B R; Schutz, Y; Semenov, V; Seto, R K; Shea, T K; Shein, I V; Shibata, T A; Shigaki, K; Shiina, T; Shin, Y H; Sibiryak, Yu; Silvermyr, D; Sim, K S; Simon-Gillo, J; Singh, C P; Singh, V; Sivertz, M; Soldatov, A; Soltz, R A; Sørensen, S; Stankus, P W; Starinsky, N; Steinberg, P; Stenlund, E; Ster, A; Stoll, S P; Sugioka, M; Sugitate, T; Sullivan, J P; Sumi, Y; Sun, Z; Suzuki, M; Takagui, E M; Taketani, A; Tamai, M; Tanaka, K H; Tanaka, Y; Taniguchi, E; Tannenbaum, M J; Thomas, J; Thomas, J H; Thomas, T L; Tian, W; Tojo, J; Torii, H A; Towell, R S; Tserruya, Itzhak; Tsuruoka, H; Tsvetkov, A A; Tuli, S K; Tydesjo, H; Tyurin, N; Ushiroda, T; van Hecke, H; Velissaris, C; Velkovska, J; Velkovsky, M; Vinogradov, A A; Volkov, M A; Vorobyov, A A; Vznuzdaev, E A; Wang, H; Watanabe, Y; White, S N; Witzig, C; Wohn, F K; Woody, C L; Xie, W; Yagi, K; Yokkaichi, S; Young, G R; Yushmanov, I E; Zajc, W A; Zhang, Z; Zhou, S

    2004-01-01

    Extensive experimental data from high-energy nucleus-nucleus collisions were recorded using the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). The comprehensive set of measurements from the first three years of RHIC operation includes charged particle multiplicities, transverse energy, yield ratios and spectra of identified hadrons in a wide range of transverse momenta (p_T), elliptic flow, two-particle correlations, non-statistical fluctuations, and suppression of particle production at high p_T. The results are examined with an emphasis on implications for the formation of a new state of dense matter. We find that the state of matter created at RHIC cannot be described in terms of ordinary color neutral hadrons.

  5. Single electrons from semi-leptonic charm and bottom hadron decays in Au+Au collisions at PHENIX

    Science.gov (United States)

    Hachiya, Takashi

    2016-08-01

    Heavy quarks are clean probes to explore the nature of strongly coupled quark gluon plasma created in high energy heavy ion collisions. The strong suppression of single electrons from semi-leptonic decays of heavy flavor hadrons was observed. To further understand the heavy quark suppressions, PHENIX installed the silicon vertex detector (VTX) which allows us to measure the bottom and charm productions separately from measurement of displaced tracks. For the first time, we observed the electrons from bottom hadron decays are less suppressed than those from charms for 3 < pT < 4 GeV/c and are similarly strongly suppressed for higher pT in minimum bias Au+Au collisions at √sNN = 200 GeV. We present the results of separated bottom and charm productions using the 2011 dataset with the VTX.

  6. Le vernis des apparences

    Directory of Open Access Journals (Sweden)

    Grazia Nicosia

    2010-04-01

    Full Text Available Le but de cet article est de comprendre l’incidence sémiotique du nettoyage d’un tableau ainsi que la résultante cognitive induite sur l’observateur. Cette étude confronte l’analyse des phénomènes visuels engendrés par le jaunissement du vernis et son retrait, à des entretiens réalisés à dessein. Le retrait d’un vernis jauni change considérablement l’image. L’heure, le climat, la saison et l’activité même des personnages s’en trouvent ainsi modifié. La patine peut être perçue, soit comme un obstacle à l’exploration, soit pour ceux qui l’apprécient, comme le medium d’une relation plus intime entre l’œuvre et l’observateur.The purpose of this article is to understand the semiotic impact of the cleaning of a painting and the cognitive effects induced on the observer. This study analyses conjointly the visual phenomenon generated by yellowing varnish and its removal and controlled interviews of observers.The removal of yellowing varnish modifies considerably the perception of the picture. Daytime, climate, season and characters activities are modified. The patina may be perceived either as an obstacle to the painting exploration, or, for those who appreciate it, as a medium for a closer relationship between the painting and the observer.

  7. Le collisionneur du futur?

    CERN Multimedia

    CERN Audiovisual Service

    2009-01-01

    Pourquoi deux études parallèles pour un même collisionneur linéaire ? Loin d’être un double effort et un gaspillage de ressources, ces deux études s’inscrivent dans une stratégie de complémentarité afin de fournir la meilleure technologie requise par la physique du futur. Vendredi 12 juin a eu lieu au CERN la première réunion conjointe CLIC et ILC. Elle n’a pas été avare de bons résultats et d’importantes décisions. Le Collisionneur Linéaire International (ILC) et le Collisionneur Linéaire Compact (CLIC) sont deux études qui font, tous deux, appel à des technologies de pointe. A première vue en compétition, les deux études sont en réalité complémentaires et elles ont un objectif commun : proposer dans les plus brefs délais et au moindre coût, l‘accélérateur linéaire le mieux adapté pour prendre le relais de la physique des très hautes énergies après le LHC.

  8. First large scale application of novel Si stripixel detector in real large experiment: Si VTX in PHENIX upgrade at RHIC

    Institute of Scientific and Technical Information of China (English)

    LI Zheng; H. ENYO; Y. GOTO; J. TOJO; Y. AKIBA; R. NOUICER; A. L. DESHPANDE; K. BOYLE; V. CIANCIOLO

    2006-01-01

    2D position sensitive,single-sided Si stripixel detector was selected as the one of the two main components of the Si vertex tracker (Si SVX) in the upgraded PHENIX detector at RHIC (relativistic heavy ion collider) in Brookhaven National Laboratory (BNL). This is the first large scale application of the novel Si stripixel detector in a real large experiment after many years of research and development at BNL. The first and second prototype fabrication runs of the SVX stripixel detectors were carried out successfully in BNL's Si detector development and processing Lab. The processing of these stripixel detectors is similar to that for the standard single-sided strip detectors: one-sided processing,single implant for the pixel (strip) electrodes,etc. The only additional processing step is the double metal process,a technology that is simple and well matured by many Si detector processing industries and labs,including BNL. The laser and beam tests on those prototype detectors show the 2D position sensitivity and good position resolution in both X and U coordinates (about 25 μm for 80 μm pitch). For the mass production of 400 sensors needed for the Si SVX,the processing technology has been successfully transferred to the industrial: Hamamatsu Photonics (HPK). HPK has produced a pre-production run of stripixel sensors with the full PHENIX SVX specification on 150 mm diameter wafers. The laser tests on these pre-production wafers show good signal to noise ratio (about 20:1).

  9. Probing properties of hot and dense QCD matter with heavy flavor in the PHENIX experiment at RHIC

    Directory of Open Access Journals (Sweden)

    Nouicer Rachid

    2015-01-01

    Full Text Available Hadrons carrying heavy quarks, i.e. charm or bottom, are important probes of the hot and dense medium created in relativistic heavy ion collisions. Heavy quarkantiquark pairs are mainly produced in initial hard scattering processes of partons. While some of the produced pairs form bound quarkonia, the vast majority hadronize into particles carrying open heavy flavor. Heavy quark production has been studied by the PHENIX experiment at RHIC via measurements of single leptons from semi-leptonic decays in both the electron channel at mid-rapidity and in the muon channel at forward rapidity. A large suppression and azimuthal anisotropy of single electrons have been observed in Au + Au collisions at 200 GeV. These results suggest a large energy loss and flow of heavy quarks in the hot, dense matter. The PHENIX experiment has also measured J/ψ production at 200 GeV in p + p, d + Au, Cu + Cu and Au + Au collisions, both at mid- and forward-rapidities, and additionally Cu + Au and U + U at forward-rapidities. In the most energetic collisions, more suppression is observed at forward rapidity than at central rapidity. This can be interpreted either as a sign of quark recombination, or as a hint of additional cold nuclear matter effects. The centrality dependence of nuclear modification factor, RAA(pT, for J/ψ in U + U collisions at √sNN = 193 GeV shows a similar trend to the lighter systems, Au + Au and Cu + Cu, at similar energy 200 GeV.

  10. Le corps des anges

    OpenAIRE

    Margel,Serge

    2017-01-01

    Ce séminaire fait suite à un cycle de conférences données en 2014 sur la notion de corps de chair dans le premier christianisme. Cette année la recherche a porté sur le corps spécifique des anges dans la patristique grecque et latine. Sur la base d’un corpus de textes délimité, j’ai essayé de montrer deux choses principales : d’un côté, on ne peut pas comprendre la spécificité du corps des anges sans l’inscrire dans le champ de l’angélologie chrétienne, qui assimile l’ange et l’âme, et d’un a...

  11. Storicizzare le teorie psicocritiche

    Directory of Open Access Journals (Sweden)

    Roberto Talamo

    2015-07-01

    Full Text Available Le teorie psicoanalitiche della letteratura, dopo una fase di alterne fortune, sono oggi praticate da una cerchia di adepti sempre più ristretta. Le nuove koinè critico-teoriche tendono infatti a relegare la dottrina freudiana all’interno di un sapere letterario (e non interpretativo o a sostituire ad essa strumenti ritenuti più efficaci nella descrizione della sfera del mentale in letteratura (neuroestetica e neuronarratologia. La proposta storiografica che qui si avanza non vuole prendere parte in questo dibattito pro o contro la psicocritica, ma vuole leggere le proposte di teoria psicoanalitica della letteratura alla luce di una riflessione sul concetto di ibridazione, concetto sul quale queste teorie hanno costruito il loro confronto con i paradigmi teorici di volta in volta egemoni.

  12. Le Nouveau Monde

    Directory of Open Access Journals (Sweden)

    Alain Musset

    2006-04-01

    Full Text Available L’histoire de la conquête du Nouveau Monde par les Européens semble devoir se résumer au destin de deux femmes chargées d’assurer le truchement entre les deux mondes et de jouer lele d’intermédiaire amoureuse ou de grande traîtresse : au Nord, Pocahontas, au Sud, La Malinche. Quand Cortés débarque en 1519 sur les côtes du Tabasco, un cacique désireux de lui plaire lui offre vingt femmes dont une superbe jeune fille, Malintzin (la Malinche, rebaptisée Marina. Celle-ci deviendra sa maîtres...

  13. Conception et calibration d'un sonoreacteur pour l'oxydation de la cellulose par le systeme TEMPO/NaOCl/NaBr

    Science.gov (United States)

    Paquin, Michel

    grande consommation d'energie et de reactif qui rend le procede difficilement accessible au milieu industriel. L'utilisation des ultrasons lors de la reaction d'oxydation permet de reduire de 50% le temps de reaction et d'autant la consommation de produits chimiques. Actuellement le processus d'oxydation s'effectue en mode discontinu pour une quantite de 20 grammes de pate dans un reacteur en verre dans un bain a ultrason. L'objectif principal de ce travail est d'elaborer un sonoreacteur en mode semi-continu afin d'etre en mesure de transferer une reaction d'oxydation du mode discontinu en mode semi-continu. Le transfert de reaction sera effectue en realisant la calibration de l'activite acoustique des deux differents reacteurs, discontinu et semi-continu, par la methode de Weissler. La methode de Weissler quantifie le taux de production radicalaire en mesurant la formation d'iode moleculaire d'une solution aqueuse d'iodure de potassium sous ultrason. Suite a sa calibration, le sonoreacteur pilote (mode semi-continu) a demontre une augmentation de la production radicalaire de 683 % a 170 kHz en comparaison avec l'utilisation d'un bain a ultrason a la meme frequence. Lors de la reaction d'oxydation, la puissance optimale utilisee dans le bain a ultrason a 170 kHz est de 1000 W. La puissance utilisee selon les resultats de calibration obtenue dans le sonoreacteur pilote est de 125 W soit une diminution de l'energie appliquee de 87,5 %. Lors de la reaction d'oxydation, le taux de production des groupements carboxylates est de 2,6 mmol COOH kg/min dans le bain a ultrason et de 6,87 mmol COOH kg/min dans le sonoreacteur pilote soit une augmentation de 164% du taux de formation. Selon les resultats obtenus, l'utilisation d'un sonoreacteur en mode continu peut etre envisageable pour la reaction d'oxydation de la cellulose par le systeme TEMPO-NaOCl-NaBr en industrie au niveau industriel.

  14. Le blue-jean

    OpenAIRE

    Miller, Daniel

    2012-01-01

    Le Blue-jean: pourquoi la technologie vient en dernier. La plupart des personnes pensent que la technique (ou la technologie) correspond à ce qui vient en amont du produit. Dans cet article, Daniel Miller s’intéresse plutôt à des cas dans lesquels l’ordre de la séquence est renversé et où le produit précède, ou initie, en quelque sorte, la technique. L’auteur commence par décrire les techniques d’usure artificielle des blue jeans  : une technique qui vise à copier les effets du port des blue ...

  15. Candide et le physicien

    CERN Document Server

    Espagnat, Bernard d'

    2008-01-01

    Les avancées considérables de la physique d'après guerre n'ont - on le sait - été possibles qu'au prix d'une vraie rupture entre elle et la physique dite " classique ". A quels changements cette rupture nous contraint-elle en ce qui concerne des notions essentielles, telles celles d'espace, de temps, d'objet et d'objectivité ? Quelles en sont les incidences quant à la portée de la connaissance, au rôle de la conscience, aux relations entre science et ontologie ? Ce sont là des questions de fond, fort délicates, auxquelles les personnes de tendance quelque peu philosophique sont plus sensibles que ne le sont les physiciens. Malheureusement, les premières ne disposent normalement pas des connaissances de pointe qui seules permettent d'approfondir de tels problèmes sans trop risquer de s'égarer. Etant donné l'impact que, par ses applications, la science a sur nos vies, nombreux sont ceux qui souhaitent se former une idée plus juste de ce qu'elle implique vraiment. Le présent ouvrage prend la for...

  16. Higgs le boson manquant

    CERN Document Server

    Carroll, Sean; Evans, Lyn; Gagnon, Pauline; Bernet, Lison

    2013-01-01

    Ce livre conte l'histoire de la plus fascinante aventure scientifique de notre temps : la quête du "boson de Higgs". La découverte présumée de cette particule élémentaire en juillet 2012 a secoué le monde, tant pour son étrangeté que pour la démesure des moyens déployés. Qu'on en juge : un accélérateur de 27 km de circonférence sous la frontière franco-suisse - le LHC, la plus grande machine jamais construite par l'Homme-, une équipe de 6 000 chercheurs, techniciens, ingénieurs, informaticiens, etc., et un budget de plus de 9 milliards de $ ! L'auteur, cosmologiste et vulgarisateur de renom, nous révèle les enjeux de cette recherche ultime : le boson expliquerait ni plus ni moins pourquoi la matière qui nous entoure a une masse, et lèverait un coin du voile qui entoure la mystérieuse "matière noire". Il détaille surtout sa genèse et les rivalités, les doutes mais aussi les intuitions géniales des acteurs du projet. Cette galerie de personnages hors norme font de la lecture de ce li...

  17. Le rouleau de la guerre

    NARCIS (Netherlands)

    Jongeling, Bastiaan

    1962-01-01

    Le projet initial de notre etude etait de presenter un commentaire avec traduction, et d'y ajouter quelques chapitres sur le caractere du contenu du rouleau, sur sa langue, sa date, ses rapports avec l'Ancien Testament et avec la litterature juive post-blblique; mais, le commentaire s'elargissant de

  18. Economic aspects of electricity and industrial heat generating reactors; Aspect economique des reacteurs produisant de l'electricite et de la chaleur industrielle

    Energy Technology Data Exchange (ETDEWEB)

    Gaussens, J.; Moulle, N.; Dutheil, F. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires; Aldebert, J. [Institut National des Sciences et Techniques Nucleaires (INSTN), CEA Saclay, 91 - Gif sur Yvette (France)

    1964-07-01

    The economic advantage of electricity-generating nuclear stations decreases when their size decreases. However, when a counter-pressure turbine is joined on to a reactor and the residual heat can be properly used, it can be shown that fairly low capacity nuclear equipment may compete with conventional equipment under certain realistic enough conditions. The aim of this paper is to define these special conditions under which nuclear energy can be profitable. They are connected with the location and the general economic environment of the station, the pattern of the electricity and heat demands it must meet, the level of fuel and specific capital costs, nuclear and conventional. These conditions entail certain technical and economic specifications for the reactors used in this way otherwise they are unlikely to be competitive. In addition, these results are referred to the potential steam and electricity market, which leads us to examine certain uses for the heat generated by double purpose power stations; for example, to supply combined industrial plants, various types of town heating and for removal of salt from sea water. (authors) [French] L'interet economique de centrales nucleaires productrices d'electricite decroit lorsque la puissance decroit. Cependant, lorsqu'on associe une turbine a contrepression a un reacteur et qu'il est possible d'utiliser dans de bonnes conditions la chaleur residuelle, on peut montrer que dans certaines conditions assez realistes, des equipements nucleaires d'une puissance unitaire peu elevee peuvent etre competitifs avec des equipements conventionnels. Cette communication a donc pour but de mettre en evidence quelles sont ces conditions particulieres de rentabilite de l'energie nucleaire. Elles sont liees a la localisation de la centrale et a son contexte economique general, a la structure de la demande d'energie electrique et thermique a laquelle elle doit satisfaire, au niveau des couts des

  19. Le 11 novembre 1942

    OpenAIRE

    Isoard, Paul

    2004-01-01

    “Citoyens de la Zone Niçoise !” Fidèles à la parole donnée, nous n’avons jamais manqué aux accords réciproques d’armistice. Dans le but d’empêcher que le sol de France ne puisse devenir un nouveau théâtre de guerre, à cause de débarquements de forces militaires anglo-américaines, nous occupons temporairement la zone démilitarisée. Pas un de Vous ne doit penser à d’intentions hostiles de notre côté.” C’est par la lecture de ce texte imprimé sur des tracts, lancés à partir d’un avion italien a...

  20. Le forme del fondo

    Directory of Open Access Journals (Sweden)

    Michel Maffesoli

    2004-12-01

    Full Text Available Non è vero che la natura ha paura del vuoto. Forse addirittura si completa. Il vuoto è anche una modalità dell'essere. È possibile nidificarvisi, avvolgersi pigramente e, così, proteggersi dall'angoscia del tempo che passa. Il vuoto delle apparenze è, in alcuni momenti, una delle forme d'espressione della vita sociale. Oltretutto occorre saperle riconoscere. Certamente, abbiamo tutti un'esistenza personale, ma siamo, ugualmente, i rappresentanti, a volte anche le vittime, di uno "spirito comune", forse anche di un "inconscio collettivo" che si è costituito di secolo in secolo. E, molto spesso, quando crediamo di esprimere le nostre idee, siamo soltanto dei portavoce, comparse di un vasto "theatrum mundi" dalle dimensioni infinite.

  1. Le cru, le cuit et le pourri dans _Le vice-consul_ de Marguerite Duras

    Directory of Open Access Journals (Sweden)

    Hélène Caron

    2011-05-01

    Full Text Available Bien que plusieurs articles critiques aient déjà avancé de nouvelles perspectives sur le texte Le Vice-Consul (LVC de Marguerite Duras, l’analyse de la représentation de la nourriture dans ce roman n’a fait l’objet d’aucune étude. Cet article tente donc de combler cette lacune en proposant d’analyser les images du cru et du cuit, images qui se rejoignent sous les notions du pourri et de l’abject, tout en offrant quelques interprétations de l’un des passages critiques du roman où la folle mendiante croque la tête d’un poisson vivant.

  2. Le Brahmane du Komintern

    Directory of Open Access Journals (Sweden)

    Elizabeth Burgos

    2008-01-01

    Full Text Available Le Brahmane du Komintern, largometraje documental del realizador francés Vladimir León, constituye un ejercicio ejemplar de investigación histórica y  de lograda factura de realización. Y, pese a no haber contado con la ayuda de ninguno organismo público, se trata de un ambicioso proyecto que cubre una amplia extensión geográfica que abarca: Estados Unidos, México, Moscú, Berlín, y la India. Gira en torno a una figura que tuvo en su tiempo su hora de gloria. Un bengalí, hijo de braman, la c...

  3. Le monde quantique

    CERN Document Server

    Aspect, A; Bensaude-Vincent, B; Castiel, A; Chevalley, C; Darrigol, O; Deligeorges, S; D'Espagnat, B; Laloë, F; Lévy-Leblond, J-M; Messiah, A; Paty, M; Vuillemin, J; Wheaton, B R

    1984-01-01

    Le monde quantique La physique quantique, après trois quarts de siècle, n'en finit pas d'être moderne. Elle est présente quotidiennement dans les laboratoires où les physiciens étudient atomes, noyaux et particules. Elle est entrée dans l'industrie où lasers, transistors et supraconducteurs lui doivent d'exister. Et elle continue à alimenter le débat philosophique sur la nature de la réalité dont elle montre la non-séparabilité fondamentale. Ses concepts de base, son développement, ses applications, ses controverses sont ici présentés par une pléiade de physiciens, d'historiens et de philosophes.

  4. Le silence des agneaux

    Directory of Open Access Journals (Sweden)

    BERNARD ROY

    2012-01-01

    Full Text Available Ce texte est avant tout une réflexion sur la notion d'obéissance, initiée à partir de deux évènements impliquant étroitement des membres de la profession infirmière. L'auteur se réjouit de la prise de parole et de l'implication directe d'infirmières dans le contexte du printemps érable. Il estime que la posture de ces infirmières s'inscrit dans ce que l'éthicien Guy Durand, appelle une obéissance autonome qui peut, du coup, mener à la désobéissance civile, à l'objection de conscience. En prenant exemple sur le silence des infirmières dans le contexte de la fermeture de postes d'infirmières en Minganie, l'auteur estime que cette posture est marginale chez les infirmières qui, majoritairement, adoptent une position de soumission et d'obéissance hétéronome.

  5. The First Transverse Single Spin Measurement in High Energy Polarized Proton-Nucleus Collision at the PHENIX experiment at RHIC

    Science.gov (United States)

    Nakagawa, I.

    2016-08-01

    Large single spin asymmetries in very forward neutron production seen using the PHENIX zero-degree calorimeters are a long established feature of transversely polarized proton-proton collisions at RHIC. Neutron production near zero degrees is well described by the one-pion exchange framework. The absorptive correction to the OPE generates the asymmetry as a consequence of a phase shift between the spin flip and non-spin flip amplitudes. However, the amplitude predicted by the OPE is too small to explain the large observed asymmetries. A model introducing interference of pion and a 1-Reggeon exchanges has been successful in reproducing the experimental data. During the RHIC experiment in year 2015, RHIC delivered polarized proton collisions with Au and Al nuclei for the first time, enabling the exploration of the mechanism of transverse single-spin asymmetries with nuclear collisions. The observed asymmetries showed surprisingly strong A-dependence in the inclusive forward neutron production, while the existing framework which was successfull in p+p only predicts moderate A- dependence. Thus the observed data are absolutely unexpected and unpredicted. In this report, experimental and theoretical efforts are discussed to disentangle the observed A-dependence using somewhat semi-inclusive type measurements and Monte-Carlo study, respectively.

  6. Moments of net-charge multiplicity distribution in Au+Au collisions measured by the PHENIX experiment at RHIC

    CERN Document Server

    Garg, P

    2013-01-01

    Beam Energy Scan (BES) program at RHIC is important to search for the existence of the critical point in the QCD phase diagram. Lattice QCD have shown that the predictions of the susceptibility of the medium formed in heavy-ion collisions can be sensitive to the various moments (mean ($\\mu$) =${}$, variance ($\\sigma^2$) = ${}$, skewness (S) = $\\frac{}{\\sigma^3}$ and kurtosis ($\\kappa$) =$\\frac{}{\\sigma^4} -3$) of conserved quantities like net-baryon number ($\\Delta$B), net-electric charge ($\\Delta$Q) and net-strangeness ($\\Delta$S). Any non-monotonic behavior of the higher moments would confirm the existence of the QCD critical point. The recent results of the higher moments of net-charge multiplicity distributions for Au+Au collisions at $\\sqrt{s}_{NN}$ varying from 7.7 GeV to 200 GeV from the PHENIX experiment at RHIC are presented. The energy and centrality dependence of the higher moments and their products (S$\\sigma$ and $\\kappa\\sigma^{2}$) are shown for the net-charge multiplicity distributions. Further...

  7. Recent results from PHENIX on double helicity asymmetry ($A_{LL}$) measurement at $\\sqrt{s}$ = 510 GeV

    CERN Document Server

    Guragain, H

    2015-01-01

    One of the major objectives of the RHIC spin program at BNL is the measurement of the gluon helicity contribution, $\\Delta G$, to the proton spin via measuring the double longitudinal spin asymmetry ($A_{LL}$) in various channels. In PHENIX (Pioneering High Energy Nuclear Interaction eXperiment) the $A_{LL}$ in $\\pi^{0}$, $\\eta$, $J/\\psi$ etc. are measured in wide rapidity range. In this talk, $A_{LL}$ in $\\pi^{0}$ production in central rapidity and $J/\\psi$ production in forward rapidity will be discussed. The $\\pi^{0}$ is reconstructed through its diphoton decay channel within the rapidity range of $\\left| \\eta \\right|$ $<$ 0.35 and azimuthal angle of $180\\,^{\\circ}$. Similarly, $J/\\psi$ is reconstructed via dimuon decay channel within the rapidity range of 1.2 $<$ $\\left| \\eta \\right|$ $<$ 2.2. Preliminary results for $A_{LL}$ in $\\pi^{0}$ and $J/\\psi$ production from the data collected in the year 2013 at center of mass energy ($\\sqrt{s}$) = 510 GeV will be presented. Also, their impact on $\\Delt...

  8. PHENIX results on fluctuations and Bose-Einstein correlations in Au+Au collisions from the RHIC Beam Energy Scan

    CERN Document Server

    Garg, Prakhar

    2016-01-01

    The RHIC Beam Energy Scan focuses on mapping the QCD phase diagram and pinpointing the location of a possible critical end point. Bose-Einstein correlations and event-by-event fluctuations of conserved quantities, measured as a function of centrality and collision energy, are promising tools in these studies. Recent lattice QCD and statistical thermal model calculations predict that higher-order cumulants of the fluctuations are sensitive indicators of the phase transition. Products of these cumulants can be used to extract the freeze-out parameters (1) and to locate the critical point (2). Two-pion interferometry measurements are predicted to be sensitive to potential softening of the equation of state and prolonged emission duration close to the critical point (3). We present recent PHENIX results on fluctuations of net-charge using high-order cumulants and their products in Au+Au collisions at \\sqsn = 7.7 - 200 GeV, and measurement of two-pion correlation functions and emission-source radii in Cu+Cu and Au...

  9. Le regard anachronique

    Directory of Open Access Journals (Sweden)

    Jean-Paul Aubert

    2011-01-01

    Full Text Available Cet article a pour objet l’anachronisme dans le film historique. Il s’appuie sur l’étude du long métrage Goya à Bordeaux, réalisé en 1999 par le cinéaste espagnol Carlos Saura. Cette biographie filmée du peintre Francisco de Goya fait mieux que composer avec l’anachronisme inhérent à toute reconstitution historique. Il l’assume et le revendique. La mise en cause de la chronologie et l’effacement de l’Histoire prennent sens dans la perspective d’une réflexion originale sur l’Histoire de l’art conçue comme un dialogue entre les œuvres et entre les époques.Este artículo está dedicado al problema del anacronismo en las películas históricas. Se basa en el estudio de Goya en Burdeos, un largo metraje rodado en 1999 por el director de cine español Carlos Saura. Esta biografía de Goya no sólo se acomoda con el anacronismo propio de la reconstitución histórica sino que lo asume y lo reivindica. El cuestionamiento de la cronología y el desinterés por la Historia cobran un nuevo sentido en el marco de una reflexión original sobre la Historia del arte concebida como un diálogo entre las obras y entre las épocas.

  10. Le survivant sans le syndrome Schreber

    Directory of Open Access Journals (Sweden)

    Richard Figuier

    2006-09-01

    Full Text Available On a pensé la catastrophe, mais a-t-on suffisamment pensé la survivance et la figure du survivant ? Ce n'est pas un hasard si celle-ci est au centre de Masse et puissance, oeuvre dans laquelle Canetti interroge la « mauvaise » survivance responsable de la poursuite de la logique de guerre. Mais où trouver la « bonne » ? Revenir de la catastrophe ne suffit pas pour être un « survivant authentique », selon l'expression de Kafka. Il faut avoir dépassé, avec Primo Levi et Robert Antelme, l'opposition de la vie comme croissance continue et de la mort comme son horrible contraire, par le don, dans la pauvreté solidaire, de cette vie retrouvée.Hemos reflexionado acerca de la catástrofe, pero ¿hemos meditado lo suficiente sobre la supervivencia y el superviviente? No es una coincidencia si el superviviente es el tema principal de Masse et puissance, obra en la cual Canetti analiza la «mala» supervivencia responsable de la persistencia de la lógica de guerra ¿Dónde sin embargo podemos encontrar la «buena» supervivencia? Superar la catástrofe no es suficiente para ser un «auténtico superviviente», según Kafka. Es fundamental ir más allá, con Primo Levi y Robert Antelme, de la oposición entre la vida, como crecimiento continuo, y la muerte, como su espantoso contrario, mediante la donación de forma solidaria de esta vida reencontrada.Disaster is the theme of many studies, but what about survival and of the figure of the survivor? This issue is central in Mass and power, work in which Canetti questions the “bad” survival, responsible for the continuation of the logic of war. But is there any “good” survival? Coming back from the catastrophe is not enough to be an “authentic survivor”, according to Kafka’s expression. To achieve this, it is necessary to have exceeded, with PrimoLevi and Robert Antelme, the opposition of life as a continuous growth and of death as its horrible opposite, by the gift, in a

  11. La piraterie sur le web

    CERN Document Server

    2002-01-01

    Les échanges de toutes sortes sont facilités à l'extrême par le web: des forums, des vidéoconférences, le commerce à distance, ou tout simplement la célérité des courriers électroniques ou la convivialité des chats, tout cela participe de la société de communication. Une certaine partie du monde découvre le nouvel horizon des échanges quasi instantanés, mais... les transactions sur le web sont-elles vraiment s res?

  12. Le principe roman

    CERN Document Server

    Ferrari, Jérôme

    2015-01-01

    Fasciné par la figure du physicien allemand Werner Heisenberg (1901-1976), fondateur de la mécanique quantique, inventeur du célèbre "principe d'incertitude" et Prix Nobel de physique en 1932, un jeune aspirant-philosophe désenchanté s'efforce, à l'aube du XXIe siècle, de considérer l'incomplétude de sa propre existence à l'aune des travaux et de la destinée de cet exceptionnel homme de sciences qui incarne pour lui la rencontre du langage scientifique et de la poésie, lesquels, chacun à leur manière, en ouvrant la voie au scandale de l'inédit, dessillent les yeux sur le monde pour en révéler la mystérieuse beauté que ne cessent de confisquer le matérialisme à l'œuvre dans l'Histoire des hommes.

  13. Harmonization of welding qualification provisions in RCC-M and European standards; Rapprochement des regles relatives aux qualifications de soudage dans les normes europeennes et le RCC-M

    Energy Technology Data Exchange (ETDEWEB)

    Lemoine, M. [Areva-NP, Tour AREVA, 92084 - Paris La Defense cedex (France); Lainez, B. [Areva-NP, usine de Chalon sur Saone 71380 Saint Marcel (France); Anastassiades, P. [EDF/Ceidre - 2 rue Ampere - 93206 SAINT-DENIS Cedex (France)

    2007-07-01

    Since a long time, numerous precautions for welding have been integrated in the nuclear codes, in particular in the RCC-M applicable to pressurized water reactors, in order to guarantee a high quality level of permanent assemblies. In parallel, European and ISO standardization works have led to a harmonisation of practices on qualification of welding processes, welders and operators. In the context of the regulatory evolutions presented during this conference, it was judged appropriate to bring closer the RCC-M practices and those of EN and ISO standards, while taking the precaution of specifying, if necessary, the complementary provisions allowing maintaining guarantees of quality consistent with the prior experience feedback. This paper presents the amendments brought to the RCC-M Code by the 2005 and 2007 addenda, in order to respond to this objective, and develops their motivations. (authors) [French] De nombreuses precautions ont ete integrees de longue date dans les codes nucleaires, et en particulier dans le RCC-M applicable aux reacteurs a eau sous pression, en matiere de soudage afin de garantir un haut niveau de qualite de ces assemblages permanents. Par ailleurs, des travaux europeens, puis ISO, ont conduit a une harmonisation des pratiques en matiere de qualification des modes operatoires de soudage et des soudeurs et operateurs. Dans le contexte des evolutions reglementaires presentees par ailleurs au cours de cette conference, il a ete juge opportun de rapprocher les pratiques du RCC-M et celles des normes EN et ISO, en prenant la precaution de specifier au besoin les dispositions complementaires permettant de maintenir des garanties de qualite coherentes avec le retour d'experience anterieur. La communication presente les amenagements apportees au code RCC-M par les modificatifs 2005 et 2007, afin de repondre a cet objectif, et en developpe les motivations. (auteurs)

  14. Overview of the system alone and system/CFD coupled calculations of the PHENIX Natural Circulation Test within the THINS project

    Energy Technology Data Exchange (ETDEWEB)

    Pialla, David, E-mail: david.pialla@cea.fr [Commissariat à l’Energie Atomique et aux Energies Alternatives (CEA), DEN/DM2S/STMF, 17 rue des martyrs, 38054 Grenoble Cedex 9 (France); Tenchine, Denis [Commissariat à l’Energie Atomique et aux Energies Alternatives (CEA), DEN/DM2S/STMF, 17 rue des martyrs, 38054 Grenoble Cedex 9 (France); Li, Simon [Commissariat à l’Energie Atomique et aux Energies Alternatives (CEA), DEN/DM2S/STMF, 91191 Gif-sur-Yvette Cedex (France); Gauthe, Paul; Vasile, Alfredo [Commissariat à l’Energie Atomique et aux Energies Alternatives (CEA), DEN/DER/SESI, 13108 Saint Paul Lez Durance Cedex (France); Baviere, Roland; Tauveron, Nicolas; Perdu, Fabien [Commissariat à l’Energie Atomique et aux Energies Alternatives (CEA), DEN/DM2S/STMF, 17 rue des martyrs, 38054 Grenoble Cedex 9 (France); Maas, Ludovic; Cocheme, François [Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN/SEMIA/BAST, B.P. 17, 92262 Fontenay-aux-Roses Cedex (France); Huber, Klaus; Cheng, Xu [Karlsruhe Institute of Technology (KIT), Institute of Fusion and Reactor Technology (IFRT), Kaiserstraße 12, Building 07.08, 76131 Karlsruhe (Germany)

    2015-08-15

    Highlights: • The PHENIX natural convection test performed during the end of life tests program. • The calculation with system codes and theirs limits. • The calculation with coupling CFD and system code, which allows better prediction. • The tasks of code validation have been done in the frame of the THINS project. - Abstract: The PHENIX sodium cooled fast reactor started operation in 1973 and was shut down in 2009. Before decommissioning, an ultimate test program was designed and performed to provide valuable data for the development of future sodium cooled fast reactors, as the so-called Astrid prototype in France. Among these ultimate tests, a thermal-hydraulic Natural Convection Test (NCT) was set-up in June 2009. Starting from a reduced power state of 120 MWt, the NCT consists of a loss of the heat sink combined with a reactor scram and a primary pumps trip leading to stabilized natural circulation in the primary sodium system. The thermal-hydraulics innovative system project (THINS project), sponsored by the European Community in the frame of the 7th FP has selected this transient for validation of both stand-alone system code simulations and coupled simulations using system and CFD codes. Participants from three organizations (CEA, IRSN and KIT) have addressed this transient using different system codes (CATHARE, DYN2B and ATHLET) and CFD codes (TRIO-U and OPEN FOAM). The present paper depicts the different modeling approaches, methodologies and compares the numerical results with the available experimental data. Finally, the main lessons learned from the work performed within the THINS project on the PHENIX NCT with respect to code development and validation are summarized.

  15. Measurement of charm and bottom production in p+p collisions at $\\sqrt{s}$ = 200 GeV at RHIC-PHENIX

    CERN Document Server

    Morino, Yuhei

    2008-01-01

    RHIC-PHENIX has observed a large suppression pattern and azimuthal anisotropy of non-photonic electron at mid-rapidity ($\\mid\\eta\\mid<0.35$) in Au+Au collisions at $\\sqrt{s_{NN}} = 200$ GeV. To understand these results and the interaction of heavy quarks in the hot and dense medium, experimental determination of production ratio of charm over bottom is one of the most important topics, since the behavior of bottom may differ from charm in the medium. We measured the ratio of charm over bottom and total cross section of bottom via partial reconstruction of D$^0to$e$^+$ K$^-$ $\

  16. Equazioni: le icone del sapere

    NARCIS (Netherlands)

    S. Bais

    2009-01-01

    Il mistero del cosmo è scritto nel linguaggio della matematica, e le equazioni sono le frasi che ne esprimono la bellezza e la profondità. Cercare di spiegare la scienza senza equazioni è come cercare di spiegare l’arte senza illustrazioni: partendo da questo presupposto, Sander Bais presenta una ga

  17. Le crime fantastique dans _Le grand saigneur_ de Rachilde

    Directory of Open Access Journals (Sweden)

    Vicky Gauthier

    2011-11-01

    Full Text Available Marguerite Eymery-Vallette (1860-1953 – plus connue sous son pseudonyme d’homme de lettres Rachilde et davantage encore pour la controverse qu’elle a créée avec la parution de sa troisième œuvre, Monsieur Vénus, roman matérialiste (1884 – a énormément publié tout au long de sa carrière littéraire (on dénombre plus d’une soixantaine d’œuvres : romans, nouvelles, contes, pièces de théâtre, etc.. Écrivant à une époque dite décadente, Rachilde y brille par ses œuvres subversives, abordant entre autres les pratiques sexuelles dépravées (sadomasochisme, nécrophilie, zoophilie, etc., mais surtout le crime (qu’il soit question de meurtre, de viol, de suicide, etc.. Ainsi, son personnage de prédilection est le marginal, le criminel dénué de morale. Cet article portera donc sur la façon dont le crime (et donc le criminel chez Rachilde verse dans le fantastique, plus spécifiquement dans un fantastique du monstrueux moral que je définirai dans un premier temps. Le roman de Rachilde, Le Grand Saigneur (1922, servira ensuite d’exemple significatif de ce monstrueux moral, notamment par l’étude du personnage éponyme de l’œuvre, soit le marquis Yves de Pontcroix, qui incarne ce criminel arborant les traces tant morales (tempérament sauvage et étrange que physiques (force hors du commun, pâleur de la peau, etc. de sa monstruosité. C’est donc dire que face au(x crime(x (ou au criminel le fantastique semble s’imposer de lui-même en guise d’explication : le genre humain ne peut vraisemblablement avoir quelque chose en commun avec cette monstruosité (ou ce monstre moral, pour reprendre les mots de Michel Foucault dans Les Anormaux. En somme, cet article se penchera sur la spécificité de l’écriture rachildienne, qui, dans le cas du roman Le Grand Saigneur, attribue une dimension fantastique au personnage criminel, renforçant d’autant plus la preuve de sa difformité (monstruosité et de sa

  18. 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.

  19. Le Milton de Toland

    Directory of Open Access Journals (Sweden)

    James C. BROWN

    2003-10-01

    Full Text Available Alors que l’œuvre de John Milton suscite encore de nombreuses critiques et interprétations, je vous propose un retour en arrière afin d’étudier l’un des premiers écrits biographiques dédié à la vie et à l’œuvre du poète anglais signé par le philosophe irlandais John Toland. Paru en 1698, Life of John Milton dresse un portrait plus complet que ceux que l’on trouve dans les précédentes biographies du poète anglais (Darbishire xxix. Ayant été l’un des premiers biographes de Milton, Toland a pub...

  20. Le citoyen rieur

    Directory of Open Access Journals (Sweden)

    Anna Rycman

    2009-11-01

    Full Text Available Dans la Pologne d’aujourd’hui, l’évolution des modèles d’engagement civique et politique s’opère plus particulièrement auprès des jeunes générations. Parmi les expériences nouvelles de participation politique, les nouvelles technologies de l’information et de la communication offrent des opportunités radicales de reconfigurer l’espace public. La jeunesse polonaise investit en masse le Web. Dans le flux de paroles affranchies circulant et dialoguant dans le cyberespace, nous nous intéressons ici au développement d’un discours qui emprunte au registre de la dérision et de la satire politiques. Une multitude de sites critiques, de nature apparemment contestataire, des sites d’opposition fondés sur le genre satirique, ont émergé comme réponse apportée à la situation politique. Cet espace public électronique représente une forme moderne de « folklore politique », contribuant au processus de socialisation des jeunes citoyens polonais.The laughing citizen. A modern form of civic commitment in democratic Poland?In present day Poland, the evolution of civic and political commitment models is above all the affaire of the younger generations. Among the current opportunities for political participation, the new information and communication technologies offer radical opportunities to reconfigure the public arena. Polish youth are flocking to the Web. Amongst the flux of frank points of views circulating and dialoguing in cyberspace, our interest here is the development of a discourse inspired by political and satirical derision. A multitude of critical, apparently anti-establishment, sites and general opposition sites using the satirical style have emerged as a response to the political situation. This public electronic space represents a modern form of « political folklore », contributing to the socialising processes of young polish citizens.El ciudadano que rie. ¿Nueva forma del compromiso cívico en la

  1. Le temps des saints

    OpenAIRE

    Alberola Romá, Armando; Armogathe,Jean-Robert; Blanco, Emilio; Caillavet, Chantal; Cantarino, Elena; Cárceles de Gea, Beatriz; Cavillac, Michel; Chastagnaret, Gérard; Corcuera Atienza, Javier; Croizat-Viallet, Jean; Edouard, Sylvène; Goffaux, Bertrand; González Calleja, Eduardo; Huard, Raymond; Lacomba, Marta

    2006-01-01

    Les contributeurs de ce dossier — historiens, spécialistes de la littérature et de l’iconographie — ont souhaité montrer comment se «fabriquent», au sens noble du terme, les saints dans l’Église catholique espagnole. Par l’écrit ou la parole, par les textes et les images, la sainteté est au Siècle d’or le centre d’une production culturelle intense ainsi qu’un enjeu idéologique: il s’agit, d’une part, de réaffirmer un culte très contesté par la Réforme et de souligner la prééminence de l’Espag...

  2. Conaissez vous le roumain?

    Directory of Open Access Journals (Sweden)

    Montes Giraldo José Joaquín

    2003-06-01

    Full Text Available

    Mioara AVRAM, Marius SALA, Conaissez vous le roumain?, Bucarest, Unión Latina, 2001. El libro de Avram y Sala es en parte una condensación del libro de Sala. Presenta en su primer capítulo lo esencial de la historia externa del rumano: nombres, localización, hablantes, clasificación genealógica, tipo, orígenes, dialectos, contactos lingüísticos antiguos y modernos, escritura, normalización, lengua literaria, etc. Esto acompañado de indicaciones bibliográficas y sobre el estudio del rumano en universidades extranjeras.

     

  3. Le grand inventaire

    Directory of Open Access Journals (Sweden)

    Michel Melot

    2012-05-01

    Full Text Available Depuis quarante ans qu’il existe, l’Inventaire général des monuments et des richesses artistiques de la France n’a pas seulement progressé, couvrant près de dix mille communes, documentant plus de vingt mille dans cinq millions de pages, trois millions de photographies, et cent mille dessins. Il est devenu ce que ses fondateurs désiraient qu’il fût. Il n’est pas une liste d’objets plus ou moins singuliers qu’on aurait oubliés, mais l’observation méthodique de l’émergence dans le monde de l’ar...

  4. Le fonds Thomas Owen

    OpenAIRE

    Stippen, Philippe Van

    2016-01-01

    Les documents et les objets du Fonds Thomas Owen, acquis par les Archives et Musée de la Littérature en mars 2014, par l’intermédiaire du collectionneur, antiquaire et peintre Jean Bertot (le fils de Thomas Owen), sont à présent inventoriés et encodés dans la base de données de l’institution. Il s’agit d’un fonds représentatif de la triple vie de Thomas Owen, lequel, parallèlement à son activité d’écrivain reconnu, était aussi un industriel prospère sous son vrai nom de Gérald Bertot et un cr...

  5. Calculation of the Phenix end-of-life test 'Control Rod Withdrawal' with the ERANOS code

    Energy Technology Data Exchange (ETDEWEB)

    Tiberi, V. [Institut de Radioprotection et de Surete Nucleaire IRSN, PSN-EXP/SNC/LNR, BP 17, 92262 Fontenay-aux-Roses (France)

    2012-07-01

    The Inst. of Radiological Protection and Nuclear Safety (IRSN) acts as technical support to French public authorities. As such, IRSN is in charge of safety assessment of operating and under construction reactors, as well as future projects. In this framework, one current objective of IRSN is to evaluate the ability and accuracy of numerical tools to foresee consequences of accidents. Neutronic studies step in the safety assessment from different points of view among which the core design and its protection system. They are necessary to evaluate the core behavior in case of accident in order to assess the integrity of the first barrier and the absence of a prompt criticality risk. To reach this objective one main physical quantity has to be evaluated accurately: the neutronic power distribution in core during whole reactor lifetime. Phenix end of life tests, carried out in 2009, aim at increasing the experience feedback on sodium cooled fast reactors. These experiments have been done in the framework of the development of the 4. generation of nuclear reactors. Ten tests have been carried out: 6 on neutronic and fuel aspects, 2 on thermal hydraulics and 2 for the emergency shutdown. Two of them have been chosen for an international exercise on thermal hydraulics and neutronics in the frame of an IAEA Coordinated Research Project. Concerning neutronics, the Control Rod Withdrawal test is relevant for safety because it allows evaluating the capability of calculation tools to compute the radial power distribution on fast reactors core configurations in which the flux field is very deformed. IRSN participated to this benchmark with the ERANOS code developed by CEA for fast reactors studies. This paper presents the results obtained in the framework of the benchmark activity. A relatively good agreement was found with available measures considering the approximations done in the modeling. The work underlines the importance of burn-up calculations in order to have a fine

  6. Dans le tourbillon des particules

    CERN Document Server

    Zito, Marco

    2015-01-01

    Accélérateurs géants, détecteurs complexes, particules énigmatiques... La physique subatomique peut sembler bien intimidante pour le novice. Et pourtant, qui n a jamais entendu parler du boson de Higgs et du CERN, le laboratoire européen où il a été découvert en 2012 ? Nul besoin d être un spécialiste pour comprendre de quoi il s agit. Aujourd hui, une théorie extraordinairement élégante, le Modèle Standard, décrit tous les résultats des expériences dans le domaine. Trente-sept particules élémentaires et quatre forces fondamentales : c est tout ce dont nous avons besoin pour expliquer la matière et l Univers ! Ce livre, destiné à un large public, raconte sans équations le long parcours qui a abouti au Modèle Standard. Ce parcours, parfois sinueux, a été entamé lorsque les Grecs anciens, et peut-être d autres avant eux, ont imaginé que la matière est composée de petites « billes ». Il faudra attendre plusieurs siècles pour qu on réalise que la matière, à l échelle micros...

  7. The Phenix Muon Spectrometer And J/psi Production In 200 Gev Center Of Mass Energy Proton-proton Collisions At Rhic

    CERN Document Server

    Hoover, A S

    2003-01-01

    The PHENIX experiment is one of the large detector projects at the Relativistic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory. One of the unique features of the PHENIX detector is the muon tracking and identification system. No other RHIC experiment has a muon detection capability. Among the many physics topics explored by the observation of muons in Au-Au collisions are the effects of Debye screening on vector meson production, and the search for an enhancement in strangeness and heavy flavor production. In the collisions of polarized protons, the muon arms can explore the polarization of quarks and gluons in the proton through W boson production, the Drell-Yan process, and open heavy flavor production. The muon detector system covers the rapidity range −2.2 < y < −1.2 for the south arm and 1.2 < y < 2.4 for the north arm, with full azimuthal coverage. The detector provides muon tracking and identification in the momentum range 2 < p &l...

  8. Le sentiment religieux dans le Jeu de Saint Nicolas

    OpenAIRE

    Rey-Flaud, Henri

    2014-01-01

    Le Jeu de saint Nicolas est un miracle, c'est même le premier miracle dramatisé en français. Il appartient donc de fait au théâtre religieux, au théâtre qui "relie" les hommes entre eux, les hommes au groupe, les hommes à la divinité. La religion dans le Jeu de saint Nicolas, ce sont d'abord les dieux païens, incarnés par Tervagan qui sont comme une caricature de la divinité selon Bodel. Le dieu païen est coupé des hommes. Il s'adresse à eux par l'oracle ambigu au Roi (v. 183). D'emblée, il n...

  9. Developpement de mesures non destructives, par ondes ultrasonores, d'epaisseurs de fronts de solidification dans les reacteurs metallurgiques

    Science.gov (United States)

    Floquet, Jimmy

    Dans les cuves d'electrolyse d'aluminium, le milieu de reaction tres corrosif attaque les parois de la cuve, ce qui diminue leur duree de vie et augmente les couts de production. Le talus, qui se forme sous l'effet des pertes de chaleur qui maintiennent un equilibre thermique dans la cuve, sert de protection naturelle a la cuve. Son epaisseur doit etre controlee pour maximiser cet effet. Advenant la resorption non voulue de ce talus, les degats generes peuvent s'evaluer a plusieurs centaines de milliers de dollars par cuve. Aussi, l'objectif est de developper une mesure ultrasonore de l'epaisseur du talus, car elle serait non intrusive et non destructive. La precision attendue est de l'ordre du centimetre pour des mesures d'epaisseurs comprenant 2 materiaux, allant de 5 a 20 cm. Cette precision est le facteur cle permettant aux industriels de controler l'epaisseur du talus de maniere efficace (maximiser la protection des parois tout en maximisant l'efficacite energetique du procede), par l'ajout d'un flux thermique. Cependant, l'efficacite d'une mesure ultrasonore dans cet environnement hostile reste a demontrer. Les travaux preliminaires ont permis de selectionner un transducteur ultrasonore a contact ayant la capacite a resister aux conditions de mesure (hautes temperatures, materiaux non caracterises...). Differentes mesures a froid (traite par analyse temps-frequence) ont permis d'evaluer la vitesse de propagation des ondes dans le materiau de la cuve en graphite et de la cryolite, demontrant la possibilite d'extraire l'information pertinente d'epaisseur du talus in fine. Fort de cette phase de caracterisation des materiaux sur la reponse acoustique des materiaux, les travaux a venir ont ete realises sur un modele reduit de la cuve. Le montage experimental, un four evoluant a 1050 °C, instrumente d'une multitude de capteurs thermique, permettra une comparaison de la mesure intrusive LVDT a celle du transducteur, dans des conditions proches de la mesure

  10. Le bal du loup

    CERN Multimedia

    Happy Children's Home

    2013-01-01

    The Bord'eau amateur theatre group will graciously perform a play of their creation Le bal du loup Saturday 19 October 2013 at 20:00 Sunday 20 October at 17:00 in the Théâtre des Grottes Rue Louis Favre 43, 1201 Genève Children from age 12 upwards. Summary: The new-elected mayoress of a small village would like to clean up the town by prohibiting alcohol and getting rid of its prostitutes. Then along comes « Massimo Lupo » the pimp... The performances will be given to support the Happy Children's Home charity, which runs a foster-home in Pokhara for Nepali children:  http://www.happychildrenshome.org/ Admission : minimum charge of 10 CHF per person requested, to cover the cost of technical assistance and theatre rental. Any profit will be used solely for the foster-home. At the end of each performance members of the HCH charity will be happy to answer any questions you may have. The theatre has 86 seats, thank you for reserv...

  11. Development of the control assembly pattern and dynamic analysis of the generation IV large gas-cooled fast reactor (GFR); Developpement du design d'un assemblage de controle et analyse dynamique des reacteurs a neutrons rapides de quatrieme generation refroidis au gaz

    Energy Technology Data Exchange (ETDEWEB)

    Girardin, G.

    2009-07-09

    modeles neutroniques 2D et 3D du coeur du reacteur ont ete crees, bases sur le schema de calculs de reference ERANOS-2.0/ERALIB1. Pour l'analyse thermo-hydraulique, le code COPERNIC du CEA a ete utilise. Le travail de design a ete poursuivi par l'etude d'un schema de l'implantation des assemblages de controle (nombre et position dans le coeur). Des etudes detaillees de neutronique ont reveles l'existence de grands effets d'interaction entre les AC, appeles effets d'ombre/d'anti-ombre, conduisant a une amplification/reduction de l'antireactivite des AC. Les interactions entre les barreaux absorbants a l'interieur d'un AC, ainsi qu'entre les AC eux-memes, ont ete investiguees dans le detail, dans le but d'optimiser l'efficacite des AC (en terme de la fraction d'absorbant et la minimisation des effets d'heterogeneite associes). Resultant d'investigations detaillees, le diametre des pastilles absorbantes a ete choisi de maniere a minimiser l'influence 'barreau-a-barreau' a l'interieur de l'assemblage. En particulier, une partie centrale de l'assemblage a ete concue sans aucun barreau absorbant (zone remplie d'helium statique). Par ce biais, une reduction, a 13%, des effets d'heterogeneite, a ete obtenue. Les investigations neutroniques effectuees pour le coeur RNR-G de reference ('2004-Coeur'), specialement, celles liees a l'Etude des interactions entre les AC, ont directement contribue au nouveau design du coeur ('2007-Coeur'). Le rapport hauteur sur diametre a ete augmente a 0.6, compare a la valeur de 0.3 pour le coeur de reference. Pendant la troisieme phase, des modeles couples et detailles, cinetiques 3D et thermohydrauliques 1D, ont ete developpes pour le coeur RNR-G; le but etait d'arriver a une comprehension, en profondeur, du comportement 3D du coeur pendant des transitoires induits par le mouvement d

  12. Curved finite elements and acceleration for the neutron transport; Elements finis courbes et acceleration pour le transport de neutrons

    Energy Technology Data Exchange (ETDEWEB)

    Moller, J.Y.

    2012-01-10

    To model the nuclear reactors, the stationary linear Boltzmann equation is solved. After discretizing the energy and the angular variables, the hyperbolic equation is numerically solved with the discontinuous finite element method. The MINARET code uses this method on a triangular unstructured mesh in order to deal with complex geometries (like containing arcs of circle). However, the meshes with straight edges only approximate such geometries. With curved edges, the mesh fits exactly to the geometry, and in some cases, the number of triangles decreases. The main task of this work is the study of finite elements on curved triangles with one or several curved edges. The choice of the basis functions is one of the main points for this kind of finite elements. We obtained a convergence result under the assumption that the curved triangles are not too deformed in comparison with the associated straight triangles. Furthermore, a code has been written to treat triangles with one, two or three curved edges. Another part of this work deals with the acceleration of transport calculations. Indeed, the problem is solved iteratively, and, in some cases, can converge really slowly. A DSA (Diffusion Synthetic Acceleration) method has been implemented using a technique from interior penalty methods. A Fourier analysis in 1D and 2D allows to estimate the acceleration for infinite periodical media, and to check the stability of the numerical scheme when strong heterogeneities exist. (author) [French] La modelisation des reacteurs nucleaires repose sur la resolution de l'equation de Boltzmann lineaire. Nous nous sommes interesses a la resolution spatiale de la forme stationnaire de cette equation. Apres discretisation en energie et en angle, l'equation hyperbolique est resolue numeriquement par la methode des elements finis discontinus. Le solveur MINARET utilise cette methode sur un maillage triangulaire non structure afin de pouvoir traiter des geometries complexes

  13. Contribution to the study of thermal-hydraulic problems in nuclear reactors; Contribution a l`etude de problemes de thermohydraulique dans les reacteurs nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Cognet, G

    1998-07-07

    In nuclear reactors, whatever the type considered, Pressurized Water Water Reactors (PWRs), Fast Breeder reactors (FBRs)..., thermal-hydraulics, the science of fluid mechanics and thermal behaviour, plays an essential role, both in nominal operating and accidental conditions. Fluid can either be the primary fluid (liquid or gas) or a very specific fluid called corium, which, in case of severe accident, could result from core and environning structure melting. The work reported here represents a 20-year contribution to thermal-hydraulic issues which could occur in FBRs and PWRs. Working on these two types of reactors, both in nominal and severe accident situations, has allowed me to compare the problems and to realize the importance of communication between research teams. The evolution in the complexity of studied problems, unavoidable in order to reduce costs and significantly improve safety, has led me from numerical modelling of single-phase flow turbulence to high temperature real melt experiments. The difficulties encountered in understanding the observed phenomena and in increasing experimental databases for computer code qualification have often entailed my participation in specific measurement device developments or adaptations, in particular non-intrusive devices generally based on optical techniques. Being concerned about the end-use of this research work, I actively participated in `in-situ` thermalhydraulic experiments in the FBRs: Phenix and Super-Phenix, of which I appreciated their undeniable scientific contribution. In my opinion, the thermal-hydraulic questions related to severe accidents are the most complex as they are at the cross-roads of several scientific specialities. Consequently, they require a multi-disciplinary approach and a continuous see-saw motion between experimentalists and modelling teams. After a brief description of the various problems encountered, the main ones are reported. Finally, the importance for research teams to

  14. Le parfum et la chair

    OpenAIRE

    Guérer, Annick Le

    2010-01-01

    De l’Antiquité jusqu’à l’orée du xixe siècle, le parfum reste profondément marqué par ses relations étroites avec la chair. Son histoire est celle d’une désincarnation qui a conduit à en faire un produit abstrait et un objet marketing. Cette désincarnation, au sens le plus propre du terme, touche le parfum lui-même lorsqu’il abandonne les produits animaux utilisés pour sa composition. Mais c’est aussi une désincarnation « fonctionnelle » dans la mesure où s’efface son rôle primordial dans la ...

  15. Le bégaiement

    Science.gov (United States)

    Perez, Hector R.; Stoeckle, James H.

    2016-01-01

    Résumé Objectif Fournir une mise à jour sur l’épidémiologie, l’hérédité, la physiopathologie, le diagnostic et le traitement du bégaiement développemental. Qualité des données Une recherche d’études récentes ou non portant sur l’épidémiologie, l’hérédité, la physiopathologie, le diagnostic et le traitement du bégaiement développemental a été effectuée dans les bases de données MEDLINE et Cochrane. La plupart des recommandations s’appuient sur des études de petite envergure, des données probantes de qualité limitée ou des consensus. Message principal Le bégaiement est un trouble d’élocution fréquent chez les personnes de tous âges, il altère la fluidité verbale normale et l’enchaînement du discours. Le bégaiement a été lié à des différences de l’anatomie, du fonctionnement et de la régulation dopaminergique du cerveau qui seraient de source génétique. Il importe de poser le diagnostic avec attention et de faire les recommandations qui conviennent chez les enfants, car de plus en plus, le consensus veut que l’intervention précoce par un traitement d’orthophonie soit cruciale chez les enfants bègues. Chez les adultes, le bégaiement est lié à une morbidité psychosociale substantielle, dont l’anxiété sociale et une piètre qualité de vie. Les traitements pharmacologiques ont soulevé l’intérêt depuis quelques années, mais les données cliniques sont limitées. Le traitement des enfants et des adultes repose sur l’orthophonie. Conclusion De plus en plus de recherches ont tenté de lever le voile sur la physiopathologie du bégaiement. La meilleure solution pour les enfants et les adultes bègues demeure la recommandation à un traitement d’orthophonie.

  16. Un oiseau "sabote" le CERN

    CERN Multimedia

    Colson, Sébastien

    2009-01-01

    Un oiseau, un simple oiseau, est parvenu à bloquer à lui tout seul l'accélérateur à particules à 3,7 milliards d'euros. UNe histoire quasiment bulresque qui a toutefois impacté le fonctionnement de la machine durant près de cinq jours, puisque c'est le système de refroidissement qui a été affecté. (1 page)

  17. Expression Study of LeGAPDH, LeACO1, LeACS1A, and LeACS2 in Tomato Fruit (Solanum lycopersicum

    Directory of Open Access Journals (Sweden)

    Pijar Riza Anugerah

    2015-10-01

    Full Text Available Tomato is a climacteric fruit, which is characterized by ripening-related increase of respiration and elevated ethylene synthesis. Ethylene is the key hormone in ripening process of climacteric fruits. The objective of this research is to study the expression of three ethylene synthesis genes: LeACO1, LeACS1A, LeACS2, and a housekeeping gene LeGAPDH in ripening tomato fruit. Specific primers have been designed to amplify complementary DNA fragment of LeGAPDH (143 bp, LeACO1 (240 bp, LeACS1A (169 bp, and LeACS2 (148 bp using polymerase chain reaction. Nucleotide BLAST results of the complementary DNA fragments show high similarity with LeGAPDH (NM_001247874.1, LeACO1 (NM_001247095.1, LeACS1A(NM_001246993.1, LeACS2 (NM_001247249.1, respectively. Expression study showed that LeACO1, LeACS1A, LeACS2, and LeGAPDH genes were expressed in ripening tomato fruit. Isolation methods, reference sequences, and primers used in this study can be used in future experiments to study expression of genes responsible for ethylene synthesis using quantitative polymerase chain reaction and to design better strategy for controlling fruit ripening in agroindustry.

  18. Le livre sur le livre traité de documentation

    CERN Document Server

    Otlet, Paul

    2015-01-01

    Paul Otlet est considéré comme le père des sciences de l'information. Ouvrage fondateur et fondamental, le Traité de documentation. Le livre sur le livre (1934) est l'aboutissement de son travail inlassable pour rassembler, classer et partager les connaissances. Otlet y propose une remarquable synthèse du savoir sur le livre et le document en même temps qu'il anticipe Internet et l'hypertexte. La réédition du Traité de documentation, 70 ans après la disparition de son auteur, coïncide avec la réouverture du Mundaneum à Mons, où le fabuleux héritage documentaire légué par Paul Otlet et Henri La Fontaine est conservé. « Ici, la table de travail n'est plus chargée d'aucun livre. À leur place se dresse un écran et à portée un téléphone. Là-bas, au loin, dans un édifice immense, sont tous les livres et tous les renseignements. De là, on fait apparaître sur l'écran la page à lire pour connaître la réponse aux questions posées par téléphone. » Préfaces de Benoît Peeters (éc...

  19. Le modèle spatial de la capitale allemande

    Directory of Open Access Journals (Sweden)

    Antoine Laporte

    2013-06-01

    Full Text Available En Allemagne, en 1999, le Chancelier fédéral et son gouvernement ont quitté Bonn pour Berlin. Ce transfert du pouvoir est accompagné de celui d’une grande partie de l’appareil d’État et de la haute administration, et des fonctions qui leur sont traditionnellement attribuées comme la presse, les lobbys ou encore la diplomatie. Le déplacement du statut de capitale effective de l’Allemagne de Bonn à Berlin est le résultat des évolutions géopolitiques d’un pays ayant recouvré son unité et sa pleine et entière souveraineté. Installer le pouvoir exécutif et législatif à Berlin était une démarche hautement symbolique, visant à normaliser la position de l’ancienne capitale de la RDA et du IIIe Reich comme véritable centre politique de l’Allemagne. Or le déplacement des institutions fédérales n’est pas qu’un acte symbolique. Il entraîne également à l’échelle intra-urbaine des dynamiques très concrètes sur le tissu urbain et participe à la mise en place de nouvelles centralités dans la ville. En effet, le statut de capitale d’État prédestine l’agglomération à la coprésence de nombreuses fonctions urbaines spécifiques plus ou moins directement liées à l’exercice ou à la symbolique du pouvoir.

  20. Le pompage optique naturel dans le milieu astrophysique

    Science.gov (United States)

    Pecker, J.-C.

    The title of this lecture abstracts only a part of it : the importance in astrophysics of the study of non-LTE situations has become considerable, as well in the stellar atmospheres as, still more, in the study of fortuitous coincidences as a mechanism of formation of emission line nebular spectra, or of molecular interstellar « masers ». Another part of this talk underlines the role of Kastler in his time, and describes his warm personality through his public reactions in front of the nuclear armement, of the Viet-Nam and Algerian wars, of the problems of political refugees... Kastler was a great scientist ; he was also a courageous humanist. 1976 : Les accords nucléaires du Brésil : allocution d'ouverture (19 mars). Colloque sur le sujet ci-dessus. 1976 : La promotion de la culture dans le nouvel ordre économique international, allocution à l'occasion d'une table ronde sur ce thème par l'UNESCO (23-27 juin 1976) ; « Sciences et Techniques », octobre 1976. 1979 : La bête immonde (avec J.-C. Pecker), « Le Matin », 20 mars. 1979 : Appel à nos ministres (avec J.-C. Pecker), « Le Monde », 13 décembre. 1979 : Le flou, le ténébreux, l'irrationnel (avec J.-C. Pecker), « Le Monde », 14 septembre. 1980 : Education à la paix, Préface, in : Publ. UNESCO. 1981 : Le vrai danger, « Le Monde », 6 août 1981. 1982 : Nucléaire civil et militaire, « Le Monde », 1er juin 1982. 1982 : Les scientifiques face à la perspective d'holocauste nucléaire (texte inédit). Le titre de cette communication en résume seulement une partie : l'importance prise en astrophysique par l'analyse des situations hors ETL est devenue considérable, qu'il s'agisse des atmosphères stellaires, ou plus encore, des coïncidences fortuites de la formation des spectres d'émission nébulaires, ou des « masers » moléculaires interstellaires. Une autre partie de cet exposé souligne lele de Kastler dans son époque, et décrit sa personnalité généreuse à travers ses r

  1. Le volcanisme dans le Sud-Ouest de Madagascar

    Science.gov (United States)

    Nicollet, Christian

    Le volcanisme dans le Sud-Ouest de Madagascar comprend: (1) des coulées turoniennes et campaniennes d'olivine-tholéiites et quartz-tholéiites typiques de marge continentale passive; elles sont contemporaines de la séparation Inde-Madagascar, (2) un systène filonien de tholéiites, de basaltes alcalins, de basanites et d'olivine-néphélinites (?); non daté, cet événement magmetique est-il à rattacher au déplacement du Nord vers le Sud de Madagascar au cours de la séparation de l'île avec l'Afrique,ou l'Afrique ou l'Antartique, entre 150 MA et 80-90 MA? Ou bien est-il contemporain des coulées tholéiitiques turoniennes et campaniennes ou encore postérieures à celles-ci? et (3) des necks et coulées à faible extention de laves alcalines post-pliocène (?) associés aux failles subsidentes qui ont fonctionné pendant tout le tertiaire.

  2. L’avion, le cerf-volant et le deuil

    Directory of Open Access Journals (Sweden)

    Jean Marie Théodat

    2009-07-01

    Full Text Available Le hasard de l’actualité nous fait publier ce neuvième numéro avec un Sur le Vif en résonance décalée par rapport à l’émoi planétaire suscité par la disparition brutale, le jeudi 25 juin, de Michael Jackson. Certes, la pop music n’est pas notre cœur de métier, mais une fois faite la part de l’ombre des coulisses d’une vie que l’on devine pleine de douleurs enfouies, et celle des paillettes qui illuminent la scène, demeure l’incontestable talent dont la ferveur planétaire justifie, dans ces co...

  3. The reprocessing of irradiated fuels by halides and their compounds; Le traitement des combustibles irradies par les halogenes et leurs composes

    Energy Technology Data Exchange (ETDEWEB)

    Bourgeois, M.; Faugeras, P. [Commissariat a l' Energie Atomique, Fontenay-aux-Roses (France). Centre d' Etudes Nucleaires

    1964-07-01

    A brief description is given of the experiments leading to the choice of the process volatilization of fluorides by gas phase attack. The chemical process is described for certain current types of clad Fuels: the aluminium or the zirconium cladding is first volatilized as chloride by attack with gaseous hydrogen chloride. The uranium is then transformed into volatile hexafluoride by attack with fluorine. These reactions are carried out consecutively in the same reactor in the presence of a fluidized bed of alumina which facilitates heat exchange. The experiments have been carried out in quantities from 100 gms to several kilograms of fuel, first without activity, and then with tracers. A description is given of the laboratory research which was carried out simultaneously on the separation of uranium and plutonium fluorides. Finally, an apparatus is described which is intended to test the process on irradiated fuel at an activity level of several thousands of curies of fission products. (authors) [French] On rappelle brievement les experimentations qui nous ont permis de decider du procede adopte volatilisation des fluorures par attaque en phase gazeuse. On decrit le processus chimique pour certains types courants de combustibles Gaines: dans un premier stade, l'aluminium ou le zirconium est volatilise sous forme de chlorure par action de l'acide chlorhydrique. Ensuite, l'uranium est transforme en hexafluorure volatil par action du fluor. Ces operations se font successivement dans un meme reacteur, en presence d'un lit fluidise d'alumine qui a pour but de faciliter les echanges thermiques. L'experimentation a ete conduite sur des quantites allant de 100 g a plusieurs kg de combustibles, en inactif, puis avec des traceurs. On decrit les etudes de laboratoire menees parallelement sur la separation des fluorures d'uranium et de plutonium. Enfin, on decrit une installation en construction destinee a experimenter le procede sur

  4. Le sacré sauvage

    Directory of Open Access Journals (Sweden)

    Roger Bastide

    2010-09-01

    Full Text Available Conférence prononcée le 13 septembre 1973 dans le cadre des Rencontres Internationales de Genève qui avaient pour thème cette année-là « Le besoin religieux ». Cette conférence figure dans les Actes de cette rencontre (Le Besoin religieux, Éditions de la Baconnière, Neuchâtel, 1974, pp. 123-145. Elle a été republiée dans un ouvrage posthume dont elle est l’éponyme, ouvrage édité par Henri Desroche (Paris, éditions Stock, 1975. Nous reproduisons ici le texte intégral original, avec l’aimable autorisation des Rencontres Internationales de Genève auxquelles SociologieS adresse ses remerciements.The wild sacredText of a lecture taken on November the 13th 1973 during the Rencontres Internationales de Genève whom theme was "The religious need". This lecture was first published in: Le Besoin religieux (La Baconnière Editions, Neuchâtel, 1974, pp. 123-145, and published once again in a posthumous book: Le sacré sauvage ("The wild sacred" edited by Henri Desroche (Paris, Stock Editions, 1975. It is reproduced here with the kind authorization of the Rencontres Internationales de Genève. SociologieS gives them sincere thanks.Le Sacré sauvage (Lo sagrado en el mundo primitivoConferencia efectuada el 13 de septiembre de 1973 en el marco de las Rencontres Internationales de Genève (Encuentros Internacionales de Ginebra que tenia como tema general la necesidad de la experiencia religiosa (“Le besoin religieux”, Éditions de la Baconnière, Neuchâtel, 1974, pp. 123-145. Esta conferencia fue publicada de nuevo en un trabajo póstumo que lleva el mismo título, editado por Henri Desroche (Paris, Éditions Stock, 1975. Reproducimos aquí la integralidad del texto original con la amable autorización de las Rencontres Internationales de Genève, a las cuales la revista SociologieS expresa su agradecimiento.

  5. Le LHC, un tunnel cosmique

    CERN Document Server

    CERN. Geneva

    2009-01-01

    Et si la lumière au bout du tunnel du LHC était cosmique ? En d’autres termes, qu’est-ce que le LHC peut nous apporter dans la connaissance de l’Univers ? Car la montée en énergie des accélérateurs de particules nous permet de mieux appréhender l’univers primordial, chaud et dense. Mais dans quel sens dit-on que le LHC reproduit des conditions proches du Big bang ? Quelles informations nous apporte-t-il sur le contenu de l’Univers ? La matière noire est-elle détectable au LHC ? L’énergie noire ? Pourquoi l’antimatière accumulée au CERN est-elle si rare dans l’Univers ? Et si le CERN a bâti sa réputation sur l’exploration des forces faibles et fortes qui opèrent au sein des atomes et de leurs noyaux, est-ce que le LHC peut nous apporter des informations sur la force gravitationnelle qui gouverne l’évolution cosmique ? Depuis une trentaine d’années, notre compréhension de l’univers dans ses plus grandes dimensions et l’appréhension de son comportement aux plus peti...

  6. Fuel cycle: the transition between the third and the fourth generation of reactors; Cycle du combustible: faire la transition vers les 3eme et 4eme generations de reacteurs

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    Many challenges arrive today for the french research and development on the fuel cycle: promote the industrial technologies, improve the world increase of the nuclear and adapt the fuel cycle technologies to the future reactors. In this framework the report presents after a recall on the fuel cycle, the researches on the fuel, the optimization of the recycling, the wastes management, the simulation and Phenix an experimentation tool for the fuel. (A.L.B.)

  7. PHENIX results on centrality dependence of yields and correlations in d plus Au collisions at root s(NN)=200 GeV

    Energy Technology Data Exchange (ETDEWEB)

    Sakaguchi, T. [Brookhaven National Lab. (BNL), Upton, NY (United States), et al.

    2016-12-01

    PHENIX has measured the transverse momentum (pT) spectra and two particle angular correlations for high pT particles in d+Au collisions at psNN=200 GeV using the RHIC Year-2008 run data. The azimuthal angle correlations for two particles with a large rapidity gap exhibit a ridge-like structure. Using the pi-0s reconstructed in the EMCal, we have successfully extended the pT reach of the correlation up to 8 GeV/c. We find that the azimuthal anisotropy of hadrons found at low pT persists up to 6 GeV/c with a significant centrality and pT dependence, similar to what was observed in A+A collisions.

  8. PHENIX results on centrality dependence of yields and correlations in d + Au collisions at √{sNN} = 200 GeV

    Science.gov (United States)

    Sakaguchi, Takao

    2016-12-01

    PHENIX has measured the transverse momentum (pT) spectra and two particle angular correlations for high pT particles in d+Au collisions at √{sNN} = 200GeV using the RHIC Year-2008 run data. The azimuthal angle correlations for two particles with a large rapidity gap exhibit a ridge-like structure. Using the π0s reconstructed in the EMCal, we have successfully extended the pT reach of the correlation up to 8GeV/c. We find that the azimuthal anisotropy of hadrons found at low pT persists up to 6GeV/c with a significant centrality and pT dependence, similar to what was observed in A+A collisions.

  9. PHENIX results on centrality dependence of yields and correlations in $d$+Au collisions at $\\sqrt{s_{_{NN}}}$=200\\,GeV

    CERN Document Server

    Sakaguchi, Takao

    2016-01-01

    PHENIX has measured the transverse momentum ($p_{\\rm T}$) spectra and two particle angular correlations for high $p_{\\rm T}$ particles in $d$+Au collisions at $\\sqrt{s_{_{NN}}}$=200\\,GeV using the RHIC Year-2008 run data. The azimuthal angle correlations for two particles with a large rapidity gap exhibit a ridge like structure. Using the $\\pi^0$ reconstructed in the EMCal, we have successfully extended the $p_{\\rm T}$ reach of the correlation up to 8\\,GeV/$c$. We find that the azimuthal anisotropy of hadrons found at low $p_{\\rm T}$ persists up to 6\\,GeV/$c$ with a significant centrality and $p_{\\rm T}$ dependence, similar to what was observed in A+A collisions.

  10. Cross Section and Double Helicity Asymmetry in Charged Hadron Production in p+p Collisions at sqrt(s)=62.4 GeV at PHENIX

    CERN Document Server

    Aidala, Christine A

    2011-01-01

    The cross section and double-helicity asymmetry for production of non-identified positive and negative charged hadrons at midrapidity in p+p collisions at sqrt(s) = 62.4 GeV have been measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) for a transverse momentum range of 0.5-4.5 GeV/c. The cross section measurements are compared to next-to-leading order and next-to-leading log perturbative QCD calculations, providing information on the applicability of these calculation techniques in the measured kinematic range. The double-helicity asymmetry measurement at this moderate energy provides sensitivity to Delta G, the gluon spin contribution to the spin of the proton, up to modestly larger values of the gluon momentum fraction than previous RHIC measurements at 200 GeV.

  11. Le Corbusier’s Dioramas

    Directory of Open Access Journals (Sweden)

    José Ramón Alonso Pereira

    2013-10-01

    Full Text Available AbstractLe Corbusier symbolizes the modern rational urbanism, whose rigorous effort of town planning demands a parallel effort of comprehension. It opposes to these contemporary urbanism that wish to perceive and to enjoy cities in a sensible way. Nevertheless, sentiment and reason are not adverses and Le Corbusier gives us at his  moment keys to intent a synthesis, joined them in a singular way by means of his ‘boîtes à miracles’ or ‘magic boxes’: those "architectural spectacles of synthesis" that he defined in 1951 Ciam. Here we try to approach to the first of those ‘spectacles’: the ‘diorama’, considering it as a corbusean strategy of mediation between rational and sensible in modern and contemporary city.Key wordsLe Corbusier, diorama, Ville Contemporaine, Plan Voisin, Plan Maciá

  12. Nietzsche, Deleuze et le sport

    OpenAIRE

    Leclercq, Stéfan

    2006-01-01

    Les philosophies de Nietzsche et Deleuze ont en commun que la pensée, comme la vie qu’elle recèle, n’est que mouvements. Mouvements rapides et hétérogènes parcourant les surfaces, comprenant l’être lui-même comme surface à traverser. Mouvements et surface organisent un jeu, celui de la pensée. Ce jeu, que Deleuze appellera « le jeu idéal », est à comparer par ses spécificités aux sports. Mais si la pensée, par son mouvement intempestif, saute toutes les limites, le sport ne peut trouver sa va...

  13. La pluie et le topoclimat

    OpenAIRE

    Van Hamme, T.

    1992-01-01

    Lorsqu'on étudie les potentialités agroéconomiques d'une région à relief accidenté, une question importante qui se pose est de savoir s'il y a des orientations et des inclinaisons privilégiées au point de vue pluviosité. De plus, il est aussi important de comparer l'action érosive de l'eau, d'un versant à un autre, en fonction de l'inclinaison et de l'orientation. Dans le cadre de cet article, on propose un modèle original permettant de répondre à ces questions. Ce modèle est particulièrement...

  14. Nietzsche, Darwin et le darwinisme

    OpenAIRE

    Merlio, Gilbert

    2012-01-01

    Le darwinisme a été pour Nietzsche un auxiliaire précieux dans son combat contre le dualisme platonicien et chrétien. Nietzsche adhère aux deux idées qui le fondent : l’idée de lutte pour la vie et l’idée d’évolution. On ne peut comprendre l’homme en faisant abstraction de son origine animale, de ses instincts et de ses affects. La généalogie a pour tâche de les mettre au jour. Nietzsche critique cependant l’aspect mécanique et utilitaire de la sélection naturelle darwinienne qui n’envisage q...

  15. le programme SET-Routes

    CERN Multimedia

    CERN Audiovisual Service

    2009-01-01

    Les routes de la science sont plus escarpées pour les femmes Le programme SET-Routes, qui visait à sensibiliser les jeunes filles à l’intérêt des carrières scientifiques, a pris fin en avril. Porté par l’EMBL, l’EMBO et le CERN, il a mis en place un réseau de femmes scientifiques, des ambassadrices qui se sont rendues dans les établissements scolaires européens pour parler de leur parcours scientifique.

  16. CERN: le Mondial de la particule

    CERN Multimedia

    Favier, R

    1998-01-01

    Avec le LEP (acc\\’{e}l\\’{e}rateur de particules), le CERN est devenu le v\\’{e}ritable phare de la science europ\\’{e}enne. Notamment pour la physique des particules. Riche de multiples exp\\’{e}riences r\\’{e}ussies, mais aussi de quelques prix Nobel, le CERN est en train de vivre une nouvelle aventure scientifique, en lan

  17. LE CORBUSIER: CONCURSOS Y PALACIOS / Le Corbusier: competitions and palaces

    Directory of Open Access Journals (Sweden)

    Fernando Zaparaín Hernández

    2012-11-01

    Full Text Available RESUMEN Cuando Le Corbusier ya había pasado de los cuarenta años se enfrentó a dos concursos internacionales: el Palacio de las Naciones en Ginebra (1926–31 y el Palacio de los Soviets en Moscú (1931–32 con los que intentaba acceder a grandes encargos de estado con mayor escala urbana en los que poner a prueba su ideario moderno sobre arquitectura y urbanismo. En ambos casos estuvo entre los vencedores pero por conveniencia e indecisión, los poderes políticos optaron por soluciones academicistas. Al conocer las decisiones definitivas, Le Corbusier y todos sus contactos del Movimiento Moderno orquestaron diversas polémicas ante los medios de comunicación y los gobernantes por entender que el progreso se veía lastrado por el triunfo de propuestas reaccionarias. Mediante el estudio de la correspondencia con personas particulares como Moser, Giedion, Colly o Stonorov, conservada en la Fundación Le Corbusier, se analizan las relaciones y el tono ideológico en torno a aquellas protestas. En esos textos quedan reflejados los principales rasgos que caracterizan la modernidad como su internacionalización, la seguridad en la propia misión, la defensa de lo nuevo o el método dialéctico.SUMMARY When Le Corbusier had already passed the age of forty he confronted two international competitions: the Palais des Nations in Geneva (1926–1931 and the Palace of the Soviets in Moscow (1931–32, with which he attempted to access large state commissions, with greater urban scale, in which to test his ideas about modern architecture and urbanism. In both cases he was among the winners, but through convenience and indecision the political powers opted for solutions from academicians. Upon knowing the final decisions, Le Corbusier and all his contacts in the Modern Movement orchestrated several controversies with the media, and the people in power, to convey that progress seemed burdened by the triumph of reactionary proposals. The relationships and

  18. Le LHC, priorité absolue

    CERN Multimedia

    Huet, S

    2002-01-01

    Le LHC, sa mise en est repoussee a 2007 quand les physiciens esperaient 2006. Le CERN a sous-estime les couts, environ 11% pour les 1 200 aimants supraconducteurs. Les Etats membres n'augmenteront pas leurs subventions, il propose donc cette semaine un plan drastique : tout pour le LHC (1/2 page).

  19. Le CERN ouvre ses entrailles au public

    CERN Multimedia

    2004-01-01

    "Le CERN se lance dans une grande opération de relations publiques pour son cinquantième anniversaire. Le centre de recherche organisera une journée portes ouvertes le 16 octobre. Quelque 50 sites pourrant être visités" (1/2 page)

  20. Le campus et le C.H.U de Bordeaux 1959-2005

    Directory of Open Access Journals (Sweden)

    Marc Saboya

    2012-04-01

    Full Text Available Première partie : Le campus et le CHU : 1959-1974Le campus, style « sévère »Le 23 juillet 1963, le plan masse du complexe universitaire prolongeant les premières réalisations de René-André Coulon est approuvé par le Conseil général des bâtiments de France. L’extension, programmée dès le départ mais impulsée par le recteur Babin, s’étire sur près de 250 ha. Le campus de Talence, Pessac et Gradignan est désormais un des plus grands d’Europe. Le plan, confié à l’architecte parisien Louis Sainsau...

  1. Le cosmos et le lotus confessions d'un astrophysicien

    CERN Document Server

    Trinh, Xuan Thuan

    2011-01-01

    Que nous dit vraiment la science sur la nature de l'univers, sur son origine et son avenir ? Par quel mystère le langage mathématique, pure création de l'esprit humain, se révèle-t-il aussi performant pour nous décrire les phénomènes physiques, de l'infiniment petit à l'infiniment grand ? S'il existe un ordre du monde, ce que nous en disent la physique quantique et la théorie de la relativité est-il compatible avec ce qu'enseigne le bouddhisme ? Et que peut-on en conclure concernant notre propre vie ? A ces questions passionnantes et à beaucoup d'autres, le célèbre astrophysicien Trinh Xuan Thuan répond ici d'une façon personnelle, en s'appuyant sur son expérience. Son itinéraire l'a placé d'emblée à la confluence de trois cultures : issu d'une famille de lettrés vietnamiens imprégnée de traditions bouddhiste et confucéenne, il a reçu une éducation à la française puis une formation scientifique à l'américaine. Une telle richesse de points de vue lui permet d'apporter, non pas de...

  2. Le contrôle de gestion des entreprises familiales : un contrôle non-financiarisé ?

    OpenAIRE

    Barbelivien, Dominique

    2016-01-01

    Nous examinons la tendance décrite dans la littérature quant à la financiarisation de la fonction de contrôle de gestion en nous appuyant sur le cas d’une entreprise de taille intermédiaire familiale. Nous constatons que le contrôle de gestion dans le cas étudié correspond à une rationalisation des décisions opérationnelles et développons les raisons qui peuvent expliquer la persistance d’un contrôle de gestion très opérationnel. Le contexte d’entreprise familiale dans laquelle il y a confusi...

  3. Le contrôle de gestion des entreprises familiales : un contrôle non-financiarisé ?

    OpenAIRE

    Barbelivien, Dominique

    2016-01-01

    Nous examinons la tendance décrite dans la littérature quant à la financiarisation de la fonction de contrôle de gestion en nous appuyant sur le cas d’une entreprise de taille intermédiaire familiale. Nous constatons que le contrôle de gestion dans le cas étudié correspond à une rationalisation des décisions opérationnelles et développons les raisons qui peuvent expliquer la persistance d’un contrôle de gestion très opérationnel. Le contexte d’entreprise familiale dans laquelle il y a confusi...

  4. Le sette meraviglie del cosmo

    CERN Document Server

    Narlikar, Jayant V

    2004-01-01

    Tra giganti, "nane" e stelle che esplodono in cielo, un vademecum per scoprire il cosmo e i misteri che lo abitano. Lasciati alle spalle i confini sicuri della Terra e del Sistema solare, assistiamo a un'esplosione continua di fenomeni inaspettati. L'universo si svela nel suo continuo mutamento, cresce in fascino e complessità via via che ci addentriamo nei suoi spazi profondi. Tramite esempi semplici, aneddoti umoristici e una prosa cristallina, Vishnu Narkilar racconta l'emozione di fronte alle sorprese del cosmo. Le "sette meraviglie" sono i fenomeni misteriosi che si nascondono dietro le stelle che punteggiano il cielo, una schiera di eventi spettacolari che per secoli hanno sfidato la curiosità umana ed eluso ogni spiegazione.

  5. Ce que permet le document

    OpenAIRE

    2012-01-01

    Avec l’archive, à laquelle il est souvent associé, le document occupe une place centrale dans les expositions comme dans les publications actuelles sur l’art contemporain. Les présents ouvrages n’ont pas pour objectif d’apporter un éclairage à ce vaste tournant mnémonique qui semble s’emparer des pratiques et des discours sur l’art depuis le début de ce troisième millénaire, même si les contributions de certains de leurs auteurs pointent des éléments conjoncturels (l’après 11 septembre) ou te...

  6. Le supplice tragique de Phyton

    OpenAIRE

    Chamoux, François

    2015-01-01

    Le siège et la prise de Rhégion par Denys l'Ancien représentent dans l'histoire du tyran un épisode d'une importance capitale. Diodore lui consacre un long développement qui dérive probablement de Timée, source principale de Diodore pour les affaires de Sicile. Le siège dura onze mois (387-386) et s'acheva par la reddition de la ville, réduite par la famine. Les efforts de Denys et les moyens considérables qu'il avait mis en œuvre pour emporter d'assaut les murailles n'avaient pu faire plier ...

  7. Noam Chomsky, Le bien commun

    OpenAIRE

    Ferrand, Laure

    2014-01-01

    Le bien commun regroupe une série d’entretiens réalisés par le journaliste américain David Barsamian avec Noam Chomsky. Ils traitent essentiellement de l’approche politique et critique de Chomsky à travers les différents écrits qu’il a publiés et les conférences qu’il a données. Ainsi, nous retrouvons dans cet ouvrage les questions principales qui irriguent la pensée de l’auteur : l’économie capitaliste est-elle synonyme de liberté ? Les États-Unis - et plus largement les pays se caractérisan...

  8. Le Yémen politique

    OpenAIRE

    Sylvaine Giraud

    2002-01-01

    Ouvrages 1999 ABÛ ISBAL (Bilqîs). An-nukhba as-siyâsîya al-hâkima fîl-Yaman 1978/1990. (L'élite politique au pouvoir au Yémen). Le Caire : Maktabat Madbûlî, 1999.  MERMIER (Franck), LEVEAU (Rémy) et STEINBACH (Udo), éds. Le Yémen contemporain. Paris : Karthala, 1999.  Al-mughtaribûn : Ar-râfid al-asâsî lit-tanmiya al-mustadâma. (Les émigrés : apport essentiel au développement durable). Sana'a : Al-Majlis al-Istishârî, Wizârat Shu'ûn al-Mughtaribîn, 1999.  1998 AL-AGHBARÎ (Ak...

  9. Le doigt d'Oreste

    OpenAIRE

    2014-01-01

    Quant aux liens du meurtrier et de sa victime, tout l'effort de la cité en Grèce ancienne sera de les effacer en instituant les tribunaux du sang et en posant la question abstraite des formes et des degrés de responsabilité de l'accusé d'homicide. C'est dans l'imaginaire autour d'Oreste entre le Ve et le VIe siècle avant notre ère que se rassemblent les représentations les plus vives liant la victime à son meurtrier, à son corps autant qu'à son être intime. With regard to the bonds linking...

  10. Le glaive de la parole

    Directory of Open Access Journals (Sweden)

    Luce Marchal-Albert

    2006-09-01

    Full Text Available Chacun sait, selon le mot de Pierre Viret, « en quelle confusion est la Chrestienté » au xvie siècle en Europe. C’est le deuxième quart du siècle qui nous intéressera ici, et en particulier l’année 1545, qui constitue une année charnière qui voit vaciller l’Église romaine, flamber et culminer la chasse aux hérétiques en même temps qu’elle voit la jeune Église réformée se renforcer et se positionner avec succès dans un champ religieux plus que chaotique. Les ouvrages polémiques réformés écrits...

  11. Louvre-Lens : le Louvre autrement

    OpenAIRE

    Audrey Bodéré

    2010-01-01

    ∙ Quels sont les enjeux du projet Louvre-Lens pour le Musée du Louvre ? Par ce projet, le Louvre participe tant à la politique de décentralisation qu’à une volonté de démocratisation culturelle, en allant à la rencontre de nouveaux publics. Mais le projet scientifique et culturel du Louvre-Lens (PSC) précise aussi que l'un des principaux défis est d'oser le « Louvre autrement ». La présentation des collections est donc repensée pour traduire le monde Louvre à Lens. Le lien entre le Louvre Par...

  12. Louvre-Lens : le Louvre autrement

    Directory of Open Access Journals (Sweden)

    Audrey Bodéré

    2010-04-01

    Full Text Available ∙ Quels sont les enjeux du projet Louvre-Lens pour le Musée du Louvre ? Par ce projet, le Louvre participe tant à la politique de décentralisation qu’à une volonté de démocratisation culturelle, en allant à la rencontre de nouveaux publics. Mais le projet scientifique et culturel du Louvre-Lens (PSC précise aussi que l'un des principaux défis est d'oser le « Louvre autrement ». La présentation des collections est donc repensée pour traduire le monde Louvre à Lens. Le lien entre le Louvre Par...

  13. Le Contrat de service public.

    OpenAIRE

    2009-01-01

    La Banque de France est concernée par le développement et la compétitivité des territoires, par l’amélioration de l’accès et de la qualité des services offerts aux publics, thèmes au coeur du Contrat de service public conclu, depuis 2003, avec l’État.

  14. Electronuclear reactors - EDF - Orientations of generic studies to be performed for the safety re-examination of 1300 MWe reactors associated to their third decennial inspection; Reacteurs electronucleaires - EDF - Orientations des etudes generiques a mener pour le reexamen de surete des reacteurs de 1300 MWe associe a leur troisieme visite decennale

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-07-01

    This report expresses the ASN's opinion on the framework and objectives of the EDF program concerning the generic studies of the safety re-examination of the 1300 MWe reactors associated with their third decennial inspection. This comprises lessons from the Fukushima accident, the improvement of the 'internal explosion' referential by using a probabilistic study, the application of the seismic margin assessment approach as soon as possible, checking the absence of any 'cliff effect' for cooling functions, a deepened re-examination of hurricane frequencies in France. Other request by the ASN concern the verification of the pertinence of release authorizations, taking the TSN law into account, taking the AP1300 project into account, the expansion of the complementary domain, the project of reactor lifetime extension. Some technical requests are discussed in appendix

  15. Georges et le big bang

    CERN Document Server

    Hawking, Lucy; Parsons, Gary

    2011-01-01

    Georges et Annie, sa meilleure amie, sont sur le point d'assister à l'une des plus importantes expériences scientifiques de tous les temps : explorer les premiers instants de l'Univers, le Big Bang ! Grâce à Cosmos, leur super ordinateur, et au Grand Collisionneur de hadrons créé par Éric, le père d'Annie, ils vont enfin pouvoir répondre à cette question essentielle : pourquoi existons nous ? Mais Georges et Annie découvrent qu'un complot diabolique se trame. Pire, c'est toute la recherche scientifique qui est en péril ! Entraîné dans d'incroyables aventures, Georges ira jusqu'aux confins de la galaxie pour sauver ses amis...Une plongée passionnante au coeur du Big Bang. Les toutes dernières théories de Stephen Hawking et des plus grands scientifiques actuels.

  16. Le Carême et le Ramadan : recréer le corps. Un cas libanais

    Directory of Open Access Journals (Sweden)

    Aïda Kanafani-Zahar

    2006-11-01

    Full Text Available Accorder son corps aux exigences du sacré afin d’accueillir une ferveur religieuse d’une grande intensité est l’objectif du Grand Carême et du Ramadan. Dès lors, de nouvelles normes sont élaborées. Elles puisent leur légitimité dans un corpus de symboles fondé, pour le Carême, sur la couleur et le goût des aliments, le désir de nature, les privations volontaires et, pour le Ramadan, sur le bouleversement du rythme alimentaire. Dans les jeûnes chrétien et musulman tels qu’ils sont vécus à Hsoun, un village du Mont Liban, le lien entre temps alimentaire et temps de l’adoration est au plus fort.

  17. le des medias dans le domaine scientifique

    CERN Document Server

    De Closets, F; Curien, Hubert; Meijers, H; Moosleitner, G P; Patermann, C; Rubbia, Carlo; CERN. Geneva; 2271246

    1993-01-01

    Promotion de la science dans les médias - création d'un réseau européen de sources scientifiques - Pourquoi la science a la presse qu'elle mérite. - Intégration des médias scientifiques de l'Europe de l'Est -Rôle des médias dans la stimulation de l'intérêt scientifique parmi la jeunesse européenne. Ouverture N.CALDER - Conférence F. de CLOSETS

  18. Le tennis dans le monde: état et prospective

    Directory of Open Access Journals (Sweden)

    Pierre DUMOLARD

    1989-06-01

    Full Text Available Le tennis est peu ou prou pratiqué dans tous les pays du monde, mais avec de considérables variations d'intensité. Actuellement, ses points d'ancrage se situent dans les pays développés occidentaux et dans l'ancienne sphère d'influence britannique. En tenant compte de l'évolution démographique et économique possible des nations, des projections de pénétration de ce sport sont établies pour l'horizon 2000.

  19. Detail study of the medium created in Au+Au collisions with high $p_T$ probes by the PHENIX experiment at RHIC

    CERN Document Server

    Sakaguchi, Takao

    2014-01-01

    Recent results on high $p_T$ identified hadrons in Au+Au collisions from the PHENIX experiment are presented. The $R_{\\rm AA}$ for $\\pi^0$ and $\\eta$ are found to be very consistent. The second and fourth order collective flow of $\\pi^0$s have been measured and found that $v_4/v_2^2$ is consistent with the one observed in lower $p_T$ region. Assuming the suppression of the $\\pi^0$ yield at highest $p_T$ arises from energy loss of partons, we found that the energy loss is $L^3$ dependent, where $L$ is the path length of the partons in the medium. The $\\delta p_T/p_T$'s of high $p_T$ hadrons are computed from 39GeV Au+Au over to 2.76TeV Pb+Pb, and found that they vary by a factor of six. We have seen a smooth trend in $\\delta p_T/p_T$ from RHIC energy to LHC energy when plotting against charged multiplicity of the systems.

  20. Measurements of the effective cumulative fission yields of 143Nd, 145Nd, 146Nd, 148Nd and 150Nd for 235U in the PHENIX fast reactor

    Directory of Open Access Journals (Sweden)

    Privas Edwin

    2016-01-01

    Full Text Available The effective Neodymium cumulative fission yields for 235U have been measured in the fast reactor PHENIX relatively to the 235U fission cross-section. The data were derived from isotope-ratio measurements obtained in the frame of the PROFIL-1, PROFIL-2A and PROFIL-2B programs. The interpretations of the experimental programs were performed with the ERANOS code in association with the Joint Evaluated Fission and Fusion library JEFF-3.1.1. Final results for 143Nd, 145Nd, 146Nd, 148Nd and 150Nd were 5.61%, 3.70%, 2.83%, 1.64% and 0.66%, respectively. The relative uncertainties attached to each of the cumulative fission yields lie between 2.1% and 2.4%. The main source of uncertainty is due to the fluence scaling procedure (<2%. The uncertainties on the Neodymium capture cross-sections provide a contribution lower than 1%. The energy dependence of the fission yields was studied with the GEF code from the thermal energy to 20 MeV. Neutron spectrum average corrections, deduced from GEF calculations, were applied to our effective fission yields with the aim of estimating fission yields at 400 keV and 500 keV, as given in the International Evaluated Nuclear Data Files (JEFF, ENDF/B and JENDL. The neutron spectrum average correction calculated for the PROFIL results remains lower than 1.5%.

  1. Status and Performance of New Silicon Stripixel Detector for the PHENIX Experiment at RHIC Beta Source, Cosmic-rays and Proton Beam at 120 GeV

    CERN Document Server

    Nouicer, Rachid

    2009-01-01

    We are constructing a Silicon Vertex Tracker detector (VTX) for the PHENIX experiment at RHIC. Our main motivation is to enable measurements of heavy flavor production (charm and beauty) in p+p, p+d and A+A collisions. Such data will illuminate the properties of the matter created in high-energy heavy-ion collisions. The measurements also will reveal the distribution of gluons in protons from p+p collisions. The VTX detector consists of four layers of barrel detectors and covers |eta|< 1.2, and almost a 2pi in azimuth. The inner two silicon barrels consist of silicon pixel sensors; their technology accords with that of the ALICE1LHCB sensor-readout hybrid. The outer two barrels are silicon stripixel detectors with a new "spiral" design, and a single-sided sensor with 2-dimensional (X, U) readout. In this paper, we describe the silicon stripixel detector and discuss its performance, including its response to electrons from a beta source (90Sr), muons from cosmic-rays, and a 120 GeV proton beam. The results ...

  2. PHENIX first measurement of the J/psi elliptic flow parameter v2 in Au+Au collisions at sqrt(sNN) = 200 GeV

    CERN Document Server

    Silvestre, Catherine

    2008-01-01

    Recent results indicate that the J/psi suppression pattern differs with rapidity showing a larger suppression at forward rapidity. J/psi suppression mechanisms based on energy density (such as color screening, interaction with co-movers, etc.) predict the opposite trend. On the other hand, it is expected that more c\\bar{c} pairs should be available to form quarkonia at mid-rapidity via recombination. Some models provide a way to differentiate J/psi production from initially produced c\\bar{c} pairs and final state recombination of uncorrelated pairs, via the rapidity and transverse momentum dependence of the elliptic flow (v2). During 2007 data taking at RHIC, a large sample of Au+Au collisions at sqrt(sNN)=200 GeV was collected. The statistics has been increased compared to previous 2004 data set, thus allowing a more precise measurement of the J/psi production at both mid and forward rapidity. Furthermore, the PHENIX experiment benefited from the addition of a new detector, which improves the reaction plane ...

  3. PHENIX results on collectivity tests in high-multiplicity p + p and p + Au collisions at √{sNN} = 200 GeV

    Science.gov (United States)

    Nakagawa, Itaru

    2016-12-01

    The observation of possible collective effects in high-multiplicity p+p and p+Pb collisions at the LHC and in d+Au and 3He+Au collisions at RHIC challenge our understanding of the ingredients necessary for quark-gluon plasma formation. For further investigation of these effects, the PHENIX collaboration has taken high statistics data in p+p and p+Au and p+Al collisions in 2015. For these data sets, high-multiplicity triggers were implemented using the forward silicon detector (FVTX) and the beam-beam counter (BBC) covering pseudo-rapidity 1.0 < | η | < 3.0 and 3.1 < | η | < 3.9, respectively. The multi-hundred million high-multiplicity event samples recorded enable highly differential analysis to look for collective effects. We report results on large pseudo-rapidity separation correlations to elucidate if the so-called ridge phenomena exists in certain p+p event classes at RHIC. The flow coefficients from azimuthal anisotropies in p+Au are extracted and compared with theoretical expectations in various models, including viscous hydrodynamics where the elliptic flow strength is expected to be substantially smaller than in d+Au and 3He+Au at the same energy due to the smaller initial spatial eccentricity.

  4. Le nouvel Edito B1

    CERN Document Server

    Heu, Elodie; Pinson, Cécile

    2012-01-01

    - Une organisation des contenus plus segmentée. Chaque unité thématique se divise en 2 dossiers constituant un ensemble pédagogique complet : un travail croisé des compétences, des entraînements spécifiques à la grammaire, un enrichissement du vocabulaire ainsi qu'en alternance, des éclairages ciblés sur la France ou la francophonie et l'interculturel. - Des renvois réguliers vers le cahier d'exercices pour consolider les nouveaux éléments grammaticaux et lexicaux.

  5. LeFort I Osteotomy.

    Science.gov (United States)

    Buchanan, Edward P; Hyman, Charles H

    2013-08-01

    The LeFort I osteotomy is one of the most commonly used procedures to correct midface deformities. It allows for correction in three dimensions including advancement, retrusion, elongation, and shortening. It is indicated, often in conjunction with mandibular surgery, for class II and III malocclusion, facial asymmetry, obstructive sleep apnea, and maxillary atrophy. Before surgery, proper orthodontics and surgical planning should be undertaken to ensure adequate outcomes. Overall, the surgery is widely used due to its low complication profile and reliable long-term results.

  6. Le arene politiche del corpo

    Directory of Open Access Journals (Sweden)

    Mariella Pandolfi

    2013-07-01

    Full Text Available L’antropologia contemporanea ha da tempo costruito intorno alla categoria “corpo” una zona di riflessione particolarmente porosa a ogni contaminazione disciplinare e a una più attenta sensibilità verso i nuovi paradigmi identitari emersi dagli anni Ottanta in poi. In tutti i suoi settori di ricerca, dall’antropologia medica al femminismo, da quella giuridica allo spazio politico, dall’etnopsichiatria al post-strutturalismo, la voce “corpo” si è imposta come luogo privilegiato per cercare di abbattere o per lo meno di rendere meno radicali le querelle disciplinari.

  7. Le corps dans l'Antiquité

    Directory of Open Access Journals (Sweden)

    Sophie Lalanne

    2008-06-01

    Full Text Available Ouvrages générauxLaqueur Thomas, La fabrique du sexe. Essai sur le corps et le genre en Occident, trad. fr., Paris, Gallimard, 1992.Feher Michel, Naddaff Ramona, Tazi Nadia, Fragments for a History of the Human Body, 3 volumes, New York, Zone Books, 1989.Le Corps dans l’AntiquitéBodiou Lydie, Frère Dominique, Mehl Véronique dir., L’expression des corps. Gestes, attitudes, regards dans l’iconographie antique, Rennes, Presses Universitaires de Rennes, 2006.Bonnard Jean-Baptiste, Le complexe de ...

  8. Counselling sur le SIDA au Japon

    OpenAIRE

    大嶋, 美登子 

    2010-01-01

    Dans cet article, nous traitons le counselling sur le Sida au Japon. Nousexaminons tout d’abord, l’état actuel des situations qui entourent lesmalades du Sida et les contaminés par le virus du HIV. Ensuit, nous prenonsen considération l’aperçu histroique du counselling en leur faveur, sonintroduction, son système, son état actuel, en citant principalement les activitésréalisées dans le département d’OITA Enfin, nous présentons ce quiest indispensable et nécessaire au counselling pour les mala...

  9. Modeling in fast dynamics of accidents in the primary circuit of PWR type reactors; Modelisation en dynamique rapide d'accidents dans le circuit primaire des reacteurs a eau pressurisee

    Energy Technology Data Exchange (ETDEWEB)

    Robbe, M.F

    2003-12-01

    Two kinds of accidents, liable to occur in the primary circuit of a Pressurized Water Reactor and involving fast dynamic phenomena, are analyzed. The Loss Of Coolant Accident (LOCA) is the accident used to define the current PWR. It consists in a large-size break located in a pipe of the primary circuit. A blowdown wave propagates through the circuit. The pressure differences between the different zones of the reactor induce high stresses in the structures of the lower head and may degrade the reactor core. The primary circuit starts emptying from the break opening. Pressure decreases very quickly, involving a large steaming. Two thermal-hydraulic simulations of the blowdown phase of a LOCA are computed with the Europlexus code. The primary circuit is represented by a pipe-model including the hydraulic peculiarities of the circuit. The main differences between both computations concern the kind of reactor, the break location and model, and the initialization of the accidental operation. Steam explosion is a hypothetical severe accident liable to happen after a core melting. The molten part of the core (called corium) falls in the lower part of the reactor. The interaction between the hot corium and the cold water remaining at the bottom of the vessel induces a massive and violent vaporization of water, similar to an explosive phenomenon. A shock wave propagates in the vessel. what can damage seriously the neighbouring structures or drill the vessel. This work presents a synthesis of in-vessel parametrical studies carried out with the Europlexus code, the linkage of the thermal-hydraulic code Mc3d dedicated to the pre-mixing phase with the Europlexus code dealing with the explosion, and finally a benchmark between the Cigalon and Europlexus codes relative to the Vulcano mock-up. (author)

  10. Development of new ferritic / martensitic steels for fuel cladding in fast neutron reactors; Developpement de nouvelles nuances d'aciers ferritiques / martensitiques pour le gainage d'elements combustibles des Reacteurs a Neutrons Rapides au sodium

    Energy Technology Data Exchange (ETDEWEB)

    Ratti, M.

    2009-11-15

    Many studies are directed toward the development of ferritic / martensitic ODS materials for applications in Gen IV programs. In this study, the mechanisms of formation of nano-phases (Y, Ti, O) and the influence of titanium on the precipitation refinement have been analyzed by small angle neutron scattering, X-ray diffraction and neutron diffraction. The obtained results allow developing new materials reinforced by nitrides (NDS which stands for Nitride Dispersion Strengthened). A first CEA patent is now being registered on these NDS materials processed by mechanical alloying. However, microstructural and mechanical characterizations are necessary to improve these new alloys. At last, a tensile and creep database has been acquired on an ODS Fe-18Cr material between room temperature and 650 C. These tests allow a qualitative description of the ODS mechanical behaviour. (author)

  11. The ASN allows the Tricastin-1 reactor to operate 40 years; L'ASN autorise le reacteur n. 1 de la centrale du Tricastin a fonctionner 40 ans

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2010-11-15

    The ASN (French Authority for Nuclear Safety) has allowed the Tricastin reactor number 1 to operate 10 years more. In July 2009 the ASN agreed to a global 10 year lifetime extension for the fleet of 900 MWe PWR under the condition of a thoroughly overhaul on a case by case basis. Tricastin-1 reactor went through this overhaul. During this inspection a particular attention was drawn on material aging and on the state of the reactor vessel. Supplementary works will have to be made in order to assure an adequate protection of the plant in case of flooding. There are 34 900 MWe PWR that operate in France, they have an average service life of 27-28 years. (A.C.)

  12. Synthesis of the IRSN report on the second safety re-inspection of the Orphee research reactor; Synthese du rapport de l'IRSN sur le deuxieme reexamen de surete du reacteur de recherche ORPHEE

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2010-09-09

    The second safety inspection of the Orphee base nuclear installation notably relies on international and French return on experience. This inspection addressed the robustness of the installation against extreme aggressions, organisational processes, radiation protection, waste and effluent management, the security of the reactor operation, handling operation security, nuclear waste warehousing safety, internal aggressions, the third confinement barrier, and the radiological consequences of incidental and accidental situations

  13. The EPR in a few words: all you need to know about the EPR nuclear reactor; L'EPR en bref: ce qu'il faut savoir sur le reacteur nucleaire EPR

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-07-01

    After a brief presentation of the EPR (European - or Evolutionary - Pressurized Reactor) type nuclear reactor, this paper, proposed by the collective group 'Stop EPR', develops the following points: EPR is as dangerous as other reactors; EPR flouts democracy; France's energy demand do not need the construction of EPRs; the construction of EPRs is not a factor of economical and social development; EPR should not be constructed neither in France nor elsewhere and the present building sites should be cancelled; the EPR will not help France to increase its energy independence and protect itself from oil price increases; choosing the EPR is incompatible with the large investments to be made in energy conservation and renewable energies; the EPR is not a solution to climate change; the VHV line corridor that will starts at Flamanville is not justified and poses risks to the environment and public health

  14. The ASN considers the Fessenheim-1 reactor able to operate 10 years more; L'ASN juge le reacteur 1 de Fessenheim apte a fonctionner 10 annees de plus

    Energy Technology Data Exchange (ETDEWEB)

    Anon

    2011-07-15

    On July 4., 2011 the Authority of Nuclear Safety (ASN) allowed the unit 1 of the Fessenheim plant to operate 10 years more under 2 major conditions. First the reinforcement of the foundation mat in order to improve the reactor resistance to corium and secondly the installation of an emergency system for the evacuation of the residual heat in case of the loss of the heat sink. The ASN stresses that this decision does not take into account the conclusions (expected at the end of 2011) of the complementary safety assessment (ECS) that was launched following the Fukushima accident. (A.C.)

  15. The EPR rector of Flamanville 3: contribution of design choices to the control of contamination; Le reacteur EPR de Flamanville 3: contribution des choix de conception a la maitrise de la contamination

    Energy Technology Data Exchange (ETDEWEB)

    Berger, M. [Electricite de France (EDF), Dir. Production Ingenierie, Centre National d' Equipement Nucleaire, 92 - Montrouge (France); Brun, C. [Areva NP-SAS, 92 - Paris la Defense (France); Guinard, L. [Electricite de France (EDF/SEPTEN), Dir. Production Ingenierie, 69 - Villeurbanne (France); Engler, N. [Areva NP-SAS, 92 - Paris la Defense (France)

    2007-07-01

    This paper describes the main design choices that will contribute to control the contamination at the EPR Flamanville 3 unit: 1 - the choice of materials directly or indirectly in contact with the primary coolant; 2 - the optimization of the purification systems design of the main nuclear loops; 3 - the passivation procedure of the primary circuit that will be implemented during the hot tests before the first start-up; 4 - the chemical conditioning of the primary coolant during reactor operation and in particular the possibility to reach a constant pH{sub 300deg.C} for the primary coolant; 5 - the possibility to preventively inject zinc in the primary coolant as soon as the beginning of the reactor exploitation; 6 - the optimization of cold shutdown and re-start-up procedures; 7 - the main control dispositions ensuring the respect of contamination mastery measures. (J.S.)

  16. Neutronic modelling of the reflector for the calculation of pressurized water reactors: application to EPR; Modelisation neutronique du reflecteur pour le calcul des coeurs des reacteurs nucleaires a eau pressurisee: application a l'EPR

    Energy Technology Data Exchange (ETDEWEB)

    Sandrin, Ch.

    2010-04-15

    This PhD Thesis aims to achieve a method for the modelling of the reflector surrounding the core for neutronics core calculations. This method should consider the EPR reactor specificities (steel reflector) and the increased demand in precision. In neutronics core calculations, the reflector can be represented either by albedos boundary conditions (current ratios) or by one or several media, surrounding the core, characterised by homogenized parameters. Those parameters (cross sections and diffusion coefficients) should be obtained using equivalence so that they allow a good reproduction of the reference albedos in a representative situation. During this PhD, such an equivalence method has been developed in the APOLLO-2 code with the minimization of a functional of the differences between the reference albedos and those computed with the equivalent parameters. Because of the positiveness constraints, a local minimization, such as Newton-like methods, is not always possible and we have therefore also implemented a Particle Swarm Optimization Algorithm for more than two energy groups' problems. The parameters obtained have been used in two dimensions EPR core calculations with the CRONOS-2 code for various fuel loadings in two to eight groups diffusion. Those core calculation have been validated against reference Monte-Carlo calculations and against core calculations with albedos boundary conditions. In addition to the increased easiness of utilization, the implemented equivalence method has yielded an improvement of the results for the two groups calculation. With a higher energy groups number, the use of a unique equivalent reflector does not account correctly for the two dimensions effects; a modelling with different reflector meshes has improved the results. The modelling of the reflector by two dimensions albedos boundary conditions is the more suited for the representation of the boundary conditions and, therefore, should the two dimensions albedos calculation be developed in a deterministic code, it is the advocated method in the future. (author)

  17. Rare earths as burnable poison for extended cycles control in electricity generation reactors; Etude des terres rares en tant que poison consommable pour le controle des cycles allonges pour les reacteurs electrogenes

    Energy Technology Data Exchange (ETDEWEB)

    Asou, M.

    1995-05-12

    The search of an optimization of the French electronuclear network operations leads to a necessary optimization of the core performances. All the economic studies performed by the utilities had shown that there is a real gain to minimize shut down periods for refueling. So, increasing the cycle length from 12 to 18 months will present a gain of shut down for a three years operation period. The theoretical burnable absorber will be a fuel admixed material bringing the required initial negative reactivity with a burn-up kinetic well suited to the fuel and allowing the lowest residual penalty as possible. The residual penalty us defined in this case by the non complete burn up of the poison, by the low of fissile material and by the accumulate of residual isotopes or nuclides. Because of the well known use of gadolinium as burnable absorber for BWR`s and PWR`s operations, the search for the best compromise to optimize all the above stress is pointed towards the rare earths. In the nuclides family, considering criteria such as cross sections, natural abundance and availability only five nuclides can play the role as burnable absorbers, namely: gadolinium, samarium, dysprosium, europium and erbium. The study presented here will show that only gadolinium and erbium will be considered to control the reactivity of the PWR`s. (author). 58 refs., 65 figs., 47 tabs.

  18. Study of water radiolysis in relation with the primary cooling circuit of pressurized water reactors; Etude sur la radiolyse de l`eau en relation avec le circuit primaire de refroidissement des reacteurs nucleaires a eau sous pression

    Energy Technology Data Exchange (ETDEWEB)

    Pastina, B

    1997-07-01

    This memorandum shows a fundamental study on the water radiolysis in relation with the cooling primary circuit of PWR type reactors. The water of the primary circuit contains boric acid a soluble neutronic poison and also hydrogen that has for role to inhibit the water decomposition under radiation effect. In the aim to better understand the mechanism of dissolved hydrogen action and to evaluate the impact of several parameters on this mechanism, aqueous solutions with boric acid and hydrogen have been irradiated in a experimental nuclear reactor, at 30, 100 and 200 Celsius degrees. It has been found that, with hydrogen, the water decomposition under irradiation is a threshold phenomenon in function of the ratio between the radiation flux `1` B(n, )`7 Li and the gamma flux. When this ratio become too high, the number of radicals is not sufficient to participate at the chain reaction, and then water is decomposed in O{sub 2} and H{sub 2}O{sub 2} in a irreversible way. The temperature has a beneficial part on this mechanism. The iron ion and the copper ion favour the water decomposition. (N.C.). 83 refs.

  19. Le principe d’inertie et le conatus du corps

    Directory of Open Access Journals (Sweden)

    Épaminondas Vamboulis

    2005-09-01

    Full Text Available Le principe d’inertie constitue la loi fondamentale qui a permis à la nouvelle physique du XVIIe siècle de construire son édifice en s’opposant aux explications scolastiques des phénomènes physiques. Tant Descartes que Spinoza ont proposé des démonstrations de cette loi physique en l’intégrant chacun dans son propre système philosophique. Spinoza dans ses Principes de la philosophie de Descartes propose même implicitement une critique de la démonstration cartésienne. Nous analysons cette critique dans la première partie de cet article et dans la suite nous proposons une lecture de la manière dont Spinoza déduit le principe d’inertie dans l’Éthique. Comme ce principe présente quant à son énoncé et quant à sa conceptualisation des affinités avec la théorie du conatus de la troisième partie de l’Éthique, cet article met en valeur la relation de ces deux parties du système et tire de leur confrontation quelques conclusions concernant le statut et la place de la physique dans la philosophie de Spinoza.The principle of inertia, despite the fact that it cannot be proven by any kind of experimental observation, is one of those principles that during the seventeenth century formed the foundations of a new physics. Both Descartes and Spinoza have tried however to demonstrate this principle and integrate it in their philosophical systems. Spinoza even proposes in his work Descartes’ Principles of Philosophy, while presenting Descartes’ view on that matter, a critical appraisal of some of the metaphysical presuppositions of the cartesian demonstration. An analysis of Spinoza’s arguments leads us to a study of the relation of the principle of inertia and the conatus theory of the Ethics, and subsequently to an interrogation concerning the status of Spinoza’s physics and the place that this science occupies in Spinoza’s philosophy.

  20. L’Association du personnel, le TREF, le Comité des Finances et le Conseil du CERN

    CERN Multimedia

    Staff Association

    2016-01-01

    L’Association du personnel, forte de son approche participative et consensuelle, recherche toujours le meilleur accord possible pour l’Organisation et son personnel. Pour ce faire, discussions et concertation avec la Direction, travail d’explication et de persuasion au TREF et ailleurs auprès des délégués des États membres sont nos principaux atouts. TREF (Tripartite Employment Conditions Forum), un Forum d’échanges, de discussions « L’objectif du Forum est d’améliorer le processus de prise de décision  en donnant aux personnes concernées la possibilité et le temps de comprendre pleinement la position de tous les participants. » (CERN/RTG/8) Le Forum tripartite sur les conditions d’emploi (TREF), créé par le Conseil du CERN en juin 1994, est composé de r...

  1. la lutte contre le SIDA au Cameroun

    African Journals Online (AJOL)

    Chantel

    gestion peu rigoureuse des affaires publiques ont conduit le pays à .... difficultés économiques que connaissent la plupart des malades et ..... reconsidère la relation homme/femme. ..... S'agissant de la répression de la contamination, le droit.

  2. L'astronomie dans le monde

    OpenAIRE

    Manfroid, Jean

    2004-01-01

    Le réveil d'Huygens; à la recherche du rayonnement le plus froid; Les vagues monstrueuses qui coulent des navires sont repérées par les satellites radar de l'ESA; Exoplanète poids plume; Sinfoni à  l'ESO; TrES 1; Cassiopée A

  3. Le contrôle de gestion environnementale d'une entreprise

    OpenAIRE

    Marquet-Pondeville, Sophie

    2001-01-01

    Dans cette recherche, nous étudions comment s’opère le contrôle de gestion environnementale. Cette problématique est abordée dans une perspective contingente et nous proposons un modèle théorique qui met en évidence l’impact de certaines variables sur les systèmes de contrôle de la gestion environnementale. Certains liens présents dans ce modèle sont discutés à travers une étude de cas.

  4. Le contrôle de gestion environnementale d'une entreprise

    OpenAIRE

    Marquet-Pondeville, Sophie

    2001-01-01

    Dans cette recherche, nous étudions comment s’opère le contrôle de gestion environnementale. Cette problématique est abordée dans une perspective contingente et nous proposons un modèle théorique qui met en évidence l’impact de certaines variables sur les systèmes de contrôle de la gestion environnementale. Certains liens présents dans ce modèle sont discutés à travers une étude de cas.

  5. Le verre de la guerre

    OpenAIRE

    Bischoff, Georges

    2012-01-01

    Les historiens du vignoble ne se sont guère intéressés à la Révolution française. À leurs yeux, le chapitre qui s’ouvre en 1789 n’a rien à voir avec les très riches heures du Moyen Âge, de la Renaissance et de l’Ancien régime : il voit sombrer des institutions séculaires – les seigneurs, les corporations, l’organisation communautaire – et se traduit par la fermeture des marchés traditionnels ; ses lendemains sont médiocres. Pourtant, ce jugement mérite d’être nuancé : les guerres de la Révolu...

  6. Chine : le pouvoir en chantant

    OpenAIRE

    TREBINJAC, Sabine

    2015-01-01

    Pour un Occidental, parler de Musique et Pouvoir est une tentative d’évaluer le pouvoir de la musique. Soit il s’agit du pouvoir de l’énoncé, thème central de la musicothérapie. Soit il s’agit du pouvoir du musicien qui, porteur d’un message, souvent politique d’ailleurs, acquiert le statut de modèle et le pouvoir de mobiliser les foules autour de lui : il peut alors lancer un concert pour l’égalité, contre l’apartheid, contre le Sommet des pays les plus industrialisés, par exemple. Ou bien e...

  7. Comme le temps passe !

    OpenAIRE

    Voituriez, Maurice

    2014-01-01

    Voici qu’on nous annonce la disparition programmée en 2012 du Minitel. Dans le n° 138 de notre revue, paru en 1988 M. Seren-Rosso parle du télécopieur, généralement appelé fax. Introduit en France dans les années 1970, il devait prendre la place du télex (connu chez nous après 1960). Le télex a vécu, le fax existe encore mais fortement concurrencé par le courriel (ou e‑mail). Il existe heureusement des créations qui persistent et Jean Maillot cite le correcteur orthographique, déjà existant ...

  8. Le Premier Amendement : un mythe

    Directory of Open Access Journals (Sweden)

    Claude‑Jean Bertrand

    2006-03-01

    Full Text Available Ce papier, plein de verve, d’humeur et d’humour, pose, comme sait si bien le faire l’auteur, des questions profondes sous une apparence paradoxale. Il a été présenté lors d’un colloque sur le Premier amendement organisé à l’Université Lumière-Lyon 2 les 17 et 18 janvier 2003. Certaines communications ont été publiées dans le volume XXIV, n°1 (2003, « Le premier amendement : un modèle américain des libertés » (sous la direction de Vincent Michelot de la Revue Tocqueville.

  9. Jouir du bonheur ou le penser ?

    OpenAIRE

    Guibet-Lafaye, Caroline

    2013-01-01

    « Malheureusement, le concept du bonheur est un concept si indéterminé, que, malgré le désir qu’a tout homme d’arriver à être heureux, personne ne peut jamais dire en termes précis et cohérents ce que véritablement il désire et veut ». L’agir de la plupart des hommes rend manifeste le fait que le bonheur est pour chacun la chose la plus désirable de toutes, la fin de toutes les actions, ce que traduit la philosophie grecque de l’action en soulignant que le bonheur est la seule chose pour laq...

  10. 1. Rôle d’équipage

    OpenAIRE

    Lamikiz, Xabier

    2016-01-01

    le d’équipage du bateau Le Dauphin (TNA, HCA 32/180–1). [image 1] Argazkiak: Xabier LAMIKIZ. Rôle d’équipage du bateau Le Dauphin (TNA, HCA 32/180–1). [image 2] Argazkiak: Xabier LAMIKIZ Rôle d’équipage du bateau Le Dauphin (TNA, HCA 32/180–1). [image 3] Argazkiak: Xabier LAMIKIZ

  11. Super-Phenix benchmark used for comparison of PNC and CEA calculation methods, and of JENDL-3.2 and CARNAVAL IV nuclear data

    Energy Technology Data Exchange (ETDEWEB)

    Hunter, S.N. [Power Reactor and Nuclear Fuel Development Corp., Oarai, Ibaraki (Japan). Oarai Engineering Center

    1998-02-01

    The study was carried out within the framework of the PNC-CEA collaboration agreement. Data were provided, by CEA, for an experimental loading of a start-up core in Super-Phenix. This data was used at PNC to produce core flux snapshot calculations. CEA undertook a comparison of the PNC results with the equivalent calculations carried out by CEA, and also with experimental measurements from SPX. The results revealed a systematic radial flux tilt between the calculations and the reactor measurements, with the PNC tilts only {approx}30-40% of those from CEA. CEA carried out an analysis of the component causes of the radial tilt. It was concluded that a major cause of radial tilt differences between the PNC and CEA calculations lay in the nuclear datasets used: JENDL-3.2 and CARNAVAL IV. For the final stage of the study, PNC undertook a sensitivity analysis, to examine the detailed differences between the two sets of nuclear data. The sensitivity analysis showed that a relatively small number of nuclear data items contributed the bulk of the radial tilt difference between calculations with JENDL-3.2 and with CARNAVAL IV. A direct comparison between JENDL-3.2 and CARNAVAL IV data revealed the following. The Nu values showed little difference. The only large fission cross-section differences were at low energy. Although down-scattering reactions showed some large fractional differences, absolute differences were negligible compared with in-group scattering; for in-group scattering fractional differences were up to {approx}75%, but generally <20%. There were many large differences in capture cross-sections, generally {approx}30-200%. (J.P.N.)

  12. Study of the production of J/{psi} in Au-Au collisions at 200 GeV per nucleon pair in the PHENIX experiment; Etude de la production du J/{psi} dans les collisions or-or a 200 GeV par paire de nucleons dans l'experience PHENIX

    Energy Technology Data Exchange (ETDEWEB)

    Tram, V.N

    2006-01-15

    One of the most promising signature of Quark Gluon Plasma formation is the heavy quarkonium suppression due to color screening effect. First experiments at the SPS (CERN) have measured an 'anomalous suppression' of the J/{psi} yields (cc-bar state) in central Pb+Pb collisions. However, measurements at different collision energies and with different ions are mandatory to conclude about the discovery of a new state of nuclear matter. This thesis describes the J/{psi} production measured in the dimuon decay channel by the PHENIX experiment (RHIC) studying Au+Au collisions at 200 GeV in the center of mass. The J/{psi} yield measured in the most central collisions is suppressed by a factor of 3 as compared to the yield expected assuming binary scaling. Within the error bars, the suppression does not affect the J/{psi}'s rapidity distribution. However, a broadening of the transverse momentum distribution is observed as compared to the distribution measured in p+p collisions. In order to understand this suppression, 'cold nuclear effects', namely nuclear absorption and shadowing, are to be taken into account. These effects can describe neither the suppression amplitude nor the suppression pattern, suggesting that other mechanisms are involved. Predictions from different models which reproduce the suppression observed by NA50, can hardly describe the PHENIX measurements and over-estimate the suppression at RHIC. Comparisons with predictions from models including recombination of charm quarks give a reasonable description of the suppression amplitude as a function of centrality. However, these predictions are not in good agreement with the observed rapidity and transverse momentum distributions. Finally, one possible scenario is that the temperature at RHIC is not high enough to reach direct J/{psi} melting and that the measured suppression is due to the sequential disappearance from higher mass resonances ({chi}{sub c} and {psi}'). In this

  13. Le Great Limpopo Transfrontier Park

    Directory of Open Access Journals (Sweden)

    Nadia Belaidi

    2008-10-01

    Full Text Available Cet article a pour objet de présenter quelques problématiques d'une recherche sur la construction d’un mécanisme de valorisation sociale de la protection de l’environnement : l’ordre public écologique. Cette étude s’appuie sur une expérience récente et originale en Afrique australe : la création de Parcs pour la Paix dont relève le Great Limpopo Transfrontier Park. Ces parcs sont officiellement consacrés à la protection et à la conservation de la diversité biologique, des ressources naturelles et culturelles qui y sont associées, ainsi qu’à la promotion de la coopération et de la Paix qu’elle soit civile, sociale, économique ou culturelle. La logique de construction de ces parcs repose sur l’idée que l’articulation des zones de conservation facilite la résolution de conflits territoriaux – de toutes sortes – en transformant les préoccupations environnementales en objet de coopération entre des juridictions politiques diverses. C’est précisément le schéma du concept juridique objet de nos travaux : l’ordre public écologique. Aussi peut-on se demander si le GLTP, en particulier, (peut constitue(r une illustration concrète de ce mécanisme et permettre d’atteindre la Paix recherchée, favorisant ainsi les processus de développement ?This article aims to present some problems of researches on the construction of a mechanism of social valorisation of the environmental protection: ecological public order. This study leans on a recent and original experience in southern Africa: the creation of Peace Park like the Great Limpopo Transfrontier Park (GLTP. These parks are officially dedicated to the protection and to the preservation of biological diversity, natural and cultural resources which are associated with it, as well as in the promotion of the cooperation and the peace. The peace looked for in these parks is not only the opposite of the war but it is also social, economic and cultural peace

  14. LeRoy el invisible

    Directory of Open Access Journals (Sweden)

    Michael M. Meguid

    Full Text Available En agosto de 1976, un joven llamado LeRoy cayó desde una cornisa fracturándose el fémur. Se sospechó una hemorragia interna importante. Durante una laparotomía se comprobó que todos los órganos internos estaban intactos y los cirujanos ortopédicos arreglaron la fractura. Treinta días después, LeRoy murió. Había comido poco; diariamente, tan solo había recibido tres litros de la glucosa, el equivalente a 510 calorías, por vía intravenosa. La glucosa fue insuficiente para satisfacer sus necesidades nutricionales,perdiendo más del 20% de su peso corporal durante su estancia en el hospital. La causa de la muerte se debió a "desnutrición médicamente inducida". Mientras tanto, un artículo científico documentó que la prevalencia de desnutrición en los hospitales de Boston era del 44% y que la desnutrición en sí era un predictor de altas tasas de complicaciones y muerte. Como resultado, los médicos sensibilizados formaron una sociedad que creó programas de formación y alentó la formación de equipos de nutrición en los hospitales. La industria comercializó fórmulas de nutrición y catéteres. Las complicaciones en enfermos hospitalizados cayeron en picado, mientras que las tasas de supervivencia aumentaron. California aprobó una legislación para regular el soporte nutricional. Aunque la industria de la atención sanitaria reconoce la importancia de la nutrición en los cuidados al paciente, el Congreso no proporcionó apoyo fiscal para los equipos de nutrición. Como resultado, los hospitales disolvieron sus equipos de nutrición de reciente creación. La educación y las habilidades en nutrición disminuyeron, y las complicaciones hospitalarias y las tasas de mortalidad aumentaron de nuevo. "No hay nadie más ciego que el que no quiere ver" Matthew Henry Clergyman 1662-1714.

  15. Le soleil devient un mythe

    Directory of Open Access Journals (Sweden)

    Ildikó Lőrinszky

    2009-01-01

    Full Text Available Partant d’une phrase énigmatique datant de 1858 et puisée dans la Correspondance de Flaubert, cet article s’interroge sur la relation entre soleil et mythe, qui constituera l’un des éléments clefs de la dimension mythologique de Salammbô. Il se propose d’examiner la façon dont cette question apparaît dans deux ouvrages représentatifs des études mythographiques : d’une part, L’Origine de tous les cultes de Charles-François Dupuis, d’autre part, Les Religions de l’Antiquité..., publié sous les noms de Frédéric Creuzer et de son adaptateur français, Joseph-Daniel Guigniault. La version française de la grande synthèse de Creuzer, assortie d’une série importante de planches, a été richement exploitée par Flaubert au cours de la genèse du roman carthaginois. Dans Salammbô, le mythe apparaît sous de multiples formes. L’analyse de ce texte peut nous amener à réfléchir sur le « bon usage » du mythe auquel chaque créateur (et chaque lecteur se trouve nécessairement confronté.Starting from an enigmatic phrase in Flaubert’s correspondence, dating from 1858, this article examines the relation between the Sun and myth, which constitutes one of the key elements of the mythological dimension of Salammbô. It especially focuses on the treatment of this question in two representative works of mythographic studies, The Origin of All Religious Worship by Charles-François Dupuis, and Les Religions de l’Antiquité..., the French adaptation of Frédéric Creuzer’s Symbolik und Mythologie der alten Völker by Joseph-Daniel Guigniault. The French version of Creuzer’s great synthesis, supplied with a remarkable set of prints, was abundantly consulted by Flaubert when writing his Carthaginian novel. In Salammbô, myth takes on various forms. Analyzing this text might lead one to reconsider “the right way” to use myths — a problem all writers (and readers find themselves confronted with.

  16. Investiguer le pluralisme de l’agir

    Directory of Open Access Journals (Sweden)

    Jean-Louis Genard

    2011-07-01

    Full Text Available Une des dimensions centrales de la sociologie développée par Laurent Thévenot et notamment dans l’ouvrage L’Action au pluriel qui nous préoccupe ici, se situe dans l’ambition d’assumer sociologiquement le pluralisme, comme l’indique d’ailleurs explicitement le titre de l’ouvrage . Ce pluralisme est un trait distinctif du travail de ce courant sociologique dont on ne sait plus vraiment s’il est pertinent de le nommer « pragmatique » puisque cette appellation est aujourd’hui quelquefois l’objet...

  17. Facial Pain (Le Algie Facciali, Editorial

    Directory of Open Access Journals (Sweden)

    Paolo Marchettini, MD

    2013-09-01

    Full Text Available Il ricorso al trattamento chirurgico delle algie facciali è di norma considerato dai neurologi un’opzione per i casi di nevralgia trigeminale in cui sia identificato con certezza un conflitto neuro vascolare e che non siano responsivi o abbiano intolleranza ai trattamenti farmacologici. Le algie facciali di altra natura non rientrano quasi mai nelle indicazioni al trattamento chirurgico proposte dai clinici, anche nei casi resistenti a molteplici terapie combinate. Eppure negli ultimi trenta-quarant’anni la neurochirurgia a cielo aperto, la chirurgia stereotassica e le metodiche di neuro-modulazione hanno radicalmente cambiato le prospettive terapeutiche dei pazienti con dolore facciale severo

  18. S'orienter dans le virtuel

    OpenAIRE

    Vitali-Rosati, Marcello

    2012-01-01

    Fictif, artificiel, imaginaire, trompeur, immatériel, irréel, impalpable, invisible, mystérieux... Lorsque l'on pense au virtuel, une foule d'idées nous submerge. Concept aux valeurs sémantiques multiformes et aux différents usages, sa signification reste floue et son sens en perpétuel mouvement. Qu'est-ce «réellement» que le virtuel ? Quel rapport entre le sens philosophique et son emploi dans le domaine du num&e...

  19. Ce que "réorganisation" veut dire ? une étude du démantèlement de la centrale nucléaire Phenix

    OpenAIRE

    Pelleterat De Borde, Melchior; Martin, Christophe; Besnard, Denis; Guarnieri, Franck

    2013-01-01

    Il n'existe pas pour le moment de réelle industrie du démantèlement nucléaire, et les expériences de grande ampleur manquent. Elles ont jusqu'à présent permis de développer un savoir essentiellement technique. D'importants choix politiques en Europe et au Japon viennent rappeler que le démantèlement va constituer, dans les années à venir, un dé pour l'ensemble de la filière nucléaire. Depuis 2010, le CRC est engagé dans une étude à la centrale Phénix, à Marcoule, qui a cessé de fonctionner en...

  20. Nuevo León

    Directory of Open Access Journals (Sweden)

    Laura Nelly Medellín Mendoza

    2006-01-01

    Full Text Available El ensayo analiza la transición política nuevoleonesa a partir de un contexto de liberalización política. En Nuevo León el régimen político autoritario fue cediendo en el plano electoral, dada la presión que conjuntamente la sociedad política y la sociedad civil ejercieron por lograr reglas democráticas. Este avance gradual permitió garantizar un organismo electoral confiable y que determinó en buena medida la garantía de la alternancia en 1997. El pan fue el partido que capitalizó el bono democrático, pero una vez en la responsabilidad de gobierno, no pudo ampliar el proceso de liberalización política al mediatizar las reformas electorales y no comprometerse para sacar del atolladero legislativo las iniciativas que garantizaban mecanismos de participación ciudadana: referéndum y plebiscito.

  1. Les ERP changent-ils le contrôle de gestion ?

    OpenAIRE

    Meyssonnier, François; Pourtier, Frédéric

    2005-01-01

    L'intégration de l'information de gestion dans le cadre d'ERP se généralise et le contrôle de gestion s'effectue maintenant la plupart du temps en environnement ERP dans les grandes entreprises. Un état de l'art est effectué relativement à l'impact des ERP aussi bien sur les concepts et les outils du contrôle de gestion que sur la fonction et lele des contrôleurs de gestion. La démarche de recherche, fondée sur dix études de cas dans une approche intermédiaire entre les monographies qualit...

  2. Les ERP changent-ils le contrôle de gestion ?

    OpenAIRE

    Meyssonnier, François; Pourtier, Frédéric

    2005-01-01

    L'intégration de l'information de gestion dans le cadre d'ERP se généralise et le contrôle de gestion s'effectue maintenant la plupart du temps en environnement ERP dans les grandes entreprises. Un état de l'art est effectué relativement à l'impact des ERP aussi bien sur les concepts et les outils du contrôle de gestion que sur la fonction et lele des contrôleurs de gestion. La démarche de recherche, fondée sur dix études de cas dans une approche intermédiaire entre les monographies qualit...

  3. Sens et reconnaissance dans le travail

    OpenAIRE

    Loriol, Marc

    2011-01-01

    Traduction d'un texte de Marc Loriol, 2011, publié (en grec) dans le Traité de sociologie du travail, Sous la direction de Christina Karakioulafis, Athènes, AIONIKOS, 2011; La plupart des sociologues ayant interrogé des salariés dans différents secteurs économiques, ont été confrontés à une plainte récurrente : le manque de reconnaissance. Ce désir de reconnaissance peut être vu comme le corollaire, dans de nombreuses activités, d'un sentiment de perte de sens du travail. Si l'on ressent le b...

  4. L'argent et le bonheur

    Institute of Scientific and Technical Information of China (English)

    郑砚心

    2011-01-01

    L'argent et le bonheur,l'un est concret et l'autre ést abstrait.Mais tous les deux sont parmi les sujets les plus traités dans la littérature et dans la vie quotidienne.Maintenant,de plus en plus de personnes aiment mettre les deux ensemble.Il semble que l'argent est devenu le synonyme du bonheur.Mais qu'en est-il en réalité? Chacun a sa propre opinion.Pour dévoiler la relation entre l'argent et le bonheur,il nous faut d'abord connaitre la signification de l'argent et du bonheur.L'argent se produit à mesure de l'évolution de la société.Et le bonheur est un sentiment non-figuratif qui existe depuis l'apparition de l'homme.

  5. Jan Potocki et le "Gothic Novel"

    Science.gov (United States)

    Finne, Jacques

    1970-01-01

    Establishes a parallel between the supernatural and fantastic qualities of Le Comte Jan Potocki's literary works, and the English gothic novels by comparing the elements of terror, mysterious atmosphere, and the supernatural beings involved. (DS)

  6. Savoir gérer le mal

    Directory of Open Access Journals (Sweden)

    Michel Maffesoli

    2015-09-01

    Full Text Available Le sens commun, conservatoire immémorial de la sagesse humaine « sait », de savoir incorporé, que le mal, l’ombre, la mort, la douleur sont des caractéristiques essentielles de l’existence en son entièreté. Dès lors les créatures quelles qu’elles soient, sont des manifestations de la vie et, dès lors, méritent une attitude « compassionnelle », fraternelle, parce qu’ensemble elles constituent le flux vital. C’est ainsi que l’on peut comprendre l’utilité sociale de ces divers « mondes intermédiaires » que sont les croyances, religieuses ou philosophiques, au « double », au « daimon », aux esprits et autres figures tutélaires ou effrayantes. Elles aident à vivre, au jour le jour, la souffrance en la communalisant.

  7. Le furet : peau et glandes annexes

    OpenAIRE

    Barreau, Christelle

    2002-01-01

    Le furet (Mustela putorius furo) fait partie des Nouveaux Animaux de Compagnie que le praticien est de plus en plus souvent amené à rencontrer en clientèle. Les problèmes cutanés sont, comme chez les autres carnivores domestiques, des motifs de consultation très fréquents, après la vaccination et la stérilisation. De plus, l'odeur particulière de cet animal représente parfois un réel désagrément pour son propriétaire. L'auteur commence par faire un rappel sur le furet, son histoire, ses carac...

  8. Kirjad üle mere / Aksel Mark

    Index Scriptorium Estoniae

    Mark, Aksel, 1913-2014

    2001-01-01

    rets. rmt.: Kirjad üle mere : Mart Lepiku kirjavahetus Julius Mägiste, Karl Ristikivi ja Bernard Kangroga / Eesti Kirjandusmuuseum; koostanud ja kommenteerinud Sirje Olesk. Tartu : Eesti Kirjandusmuuseum, 2000. 160 lk. (Litteraria; 19)

  9. Extraction of the high transverse momentum photons in proton + proton collisions at 200 GeV in the PHENIX experiment at RHIC; Isolation des photons de grande impulsion transverse dans les collisions proton+proton a 200 GeV dans l'experience PHENIX au RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Hadl Henni, Ahmed [Ecole doctorale STIM, Sciences et Technologies de l' Information et des Materiaux, Ecole Centrale de Nantes, Universite de Nantes, Ecole des Mines de Nantes, 1 rue de la Noe, BP 92101, 44321 Nantes Cedex 3 (France)

    2007-02-15

    Ultra-relativistic heavy ions collisions allow to reach a hot and dense matter. This new state, called Quarks and Gluons Plasma (QGP), would exist at the first moment of our universe according to the Big Bang theory. The PHENIX experiment, one of the interaction point of the RHIC collider at Brookhaven National Laboratory (USA), aims to study the QGP's signatures. Photons don't interact strongly with the matter and so are an accurate tool to explore the phase of QGP. Moreover photons are emitted during all the phases of the nuclear collision: from the initial state to the final hadronization. We will present a direct photon, produced by hard scattering process in the beginning of the collision, identification method (SICA, Spectroscopic Isolation Cut Analysis) applied on p + p collisions at 200 GeV. This method allows for a better discrimination between direct photons and the other contribution (mainly the electromagnetic decay of the neutral pion). One could find in this thesis the direct photon rate production obtained by SICA and compared to other analysis. With the p + p collisions we have an important reference for the more heavier collisions (Au + Au) where we assume the QGP formation. (author)

  10. Le piratage des biens d'information

    OpenAIRE

    Paul Belleflamme

    2003-01-01

    Où se situe le juste milieu entre les propos alarmistes des uns (“le piratage tue la production musicale!”) et les appels libertaires des autres (“l'accès à toute information doit être libre!”) ? Une analyse économique simple nous permet de mieux comprendre les enjeux et de dégager des pistes de réflexion pour l'avenir.

  11. Le géomarketing : introduction critique

    OpenAIRE

    1989-01-01

    The article attempts to analyze the new field of investigation that is the geomarketing address the following issues: definitions, tools and methods, application areas, strengths and weaknesses L'article tente d'analyser le nouveau champ d'investigation que constitue le géomarketing en traitant des points suivants : définition, outils et méthodes, domaines d'application, forces et faiblesses.

  12. Évaluations, impacts et perceptions du changement climatique dans le Grand Ouest : le projet CLIMASTER

    OpenAIRE

    MEROT, Philippe; Corgne, Samuel; Delahaye, Daniel; Desnos, Philippe; Dubreuil, Vincent; Gascuel, Chantal; Giteau, Jean-Luc; Joannon, Alexandre; Planchon, Olivier; Quénol, Hervé

    2012-01-01

    Nous nous proposons dans cette communication de décrire la démarche et les principaux résultats qui ont été obtenus dans le cadre du projet CLIMASTER, pour contribuer au débat sur l’état actuel des connaissances sur le changement climatique (CC) dans le Grand Ouest. Vis-à-vis du climat, nous avons développé des analyses originales portant essentiellement sur différentes longues chroniques climatiques du passé dans le Grand Ouest, pour voir l’évolution déjà en cours du CC. Ces analyses ont por...

  13. Le patrimoine et ses outils de gestion

    CERN Document Server

    Garcin, J

    2001-01-01

    Les principale taches de gestion du Patrimoine immobilier du CERN sont la saisie des données, leur mise à jour, l'archivage et la mise à disposition des informations. Les outils de gestion actuels : Le Système de Gestion de Base de Données Relationnelles alphanumérique ORACLE permet de gérer toutes les informations du Patrimoine, sur le réseau du CERN. Le logiciel de dessin Graphique MICROSTATION (Bentley) a été installé dans la division ST depuis fin 1991. Les plans de situation des sites, des bâtiments et locaux, des espaces confinés ont été réalisés avec ce logiciel. Les outils de demain : La mise en place du SIG (Système d'Information Graphique) STAR a été réalisée en 1993. Le transfert des plans de locaux de MICROSTATION vers STAR est en cours depuis une année environ. Le dessin de la cartographie des réseaux de canalisations Eaux Usées et Eaux Pluviales est en cours de réalisation. Le Web est l'outil de consultation de l'information par les utilisateurs.

  14. Le concept d’ethos.

    Directory of Open Access Journals (Sweden)

    Bernard Fusulier

    2011-09-01

    Full Text Available Dans cet article, l’auteur traite de la signification et de l’usage du concept d’ethos. Dans la sociologie classique, ce dernier a été utilisé pour comprendre et qualifier la rationalité socialement et éthiquement encastrée des conduites sociales. Exprimant l’intériorisation d’un principe organisateur de pratiques, dessinant une matrice globale des comportements, il est porteur d’une vision qui paraît datée à l’heure du “brouillage des classes sociales”, de la “modernité liquide” et de “l’homme pluriel”. Néanmoins, si l’on reconnaît l’existence d’un univers social non entièrement liquéfié, c’est-à-dire où continuent à exister des milieux sociaux sédimentés qui imprègnent avec plus ou moins de profondeur le système de personnalité de celui qui s’y insère durablement, l’ethos reste un concept heuristique pour saisir et interpréter les récurrences de comportements qui peuvent s’y observer. Permettant de comprendre ce que les espaces d’insertion “font aux individus” ainsi que la façon dont les principes organisateurs de pratiques entrent en transaction (en consonance, en dissonance ou en concurrence, il garde toute sa pertinence dans la boîte à outils théoriques du sociologue et de l’anthropologue d’aujourd’hui.

  15. La Vie Politique sous la Restauration a Travers ’Le Rouge et le Noir’ de Stendahl (The Political Life during the Restauration as Depicted in Le Rouge et le Noir by Stendahl)

    Science.gov (United States)

    1989-01-01

    CCESSION NO. 11. TITLE (Include Security Clanification) (UNCLASSIFIED) 4 by Stendhal THE POLITICAL LIFE DURING THE RESTAURATION AS DEPICTED IN Le Rouge...34OVERPRINT" Brian CHRISTENSEN The Political Life during the Restauration as depicted in Le Rouge et le Noir by Stendhal CONSTRUCTION : The overall...Brian CHRISTENSEN La vie politique sous la Restauration A travers Le Rouge et le Noir de Stendhal CONSTRUCTION La construction d’ensemble du mdmoire est

  16. Report by the AERES on the unit: Reactor Study Department (DER) under the supervision of the establishments and bodies: Atomic Energy and Alternative Energies Commission (CEA); Rapport de l'AERES sur l'unite: Departement d'Etudes des Reacteurs (DER) sous tutelle des etablissements et organismes: CEA

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-02-15

    This report is a kind of audit report on a research laboratory, the DER (Departement d'Etudes des Reacteurs, Reactor Study Department) whose activity if focused on four main themes: neutron transport simulation in reactor cores, thermal-hydraulic simulation of reactors, design and safety of innovative reactors, nuclear instrumentation for reactors. The authors discuss an assessment of the whole unit activities in terms of strengths and opportunities, aspects to be improved, risks and recommendations, productions and publications, scientific quality, influence and attractiveness (awards, recruitment capacity, capacity to obtain financing and to tender, participation to international programs), strategy and governance, and project. These same aspects are then discussed and commented for each theme

  17. LE LIEN ENTRE FINANCE ET ECONOMIE ISLAMIQUES VIA LE MODELE PRINCIPIEL "ZR"

    OpenAIRE

    BELABES, ABDERRAZAK

    2010-01-01

    A l'heure où certains évoquent l'intégration de la finance islamique à la finance globale, et d'autres rattachent la finance islamique à des thèmes en vogue telles que la finance éthique, la finance participative ou la finance socialement responsable, le présent papier explore le lien entre finance et économie islamiques à partir du modèle principiel "ZR", c’est-à-dire "Zakât" et "Ribâ". Ce modèle montre que les principes invariants de Zakât et Ribâ jouent un rôle central dans l’établissement...

  18. Lele de la confiance dans le système de gouvernance des entreprises

    OpenAIRE

    Gérard Charreaux

    1998-01-01

    La confiance est censée jouer un rôle important pour expliquer les écarts de performance entre les différents systèmes économiques nationaux. Cet article vise à analyser ce rôle en s'appuyant sur la théorie de la gouvernance des entreprises. Après avoir proposé une définition de la confiance comme mécanisme de gouvernance, précisé les caractéristiques ce dernier et analysé son impact sur la latitude managériale, nous avons exploré le lien existant entre la confiance et la création de valeur p...

  19. La Quarantaine de Le Clézio et le vertige intertextuel

    Directory of Open Access Journals (Sweden)

    Madeleine Borgomano

    2006-09-01

    Full Text Available Le terme de vertige employé par M. Schneider convient particulièrement pour qualifier les jeux de l’intertextualité dans La Quarantaine de Le Clézio, même en la limitant aux textes effectivement cités. Intertexte essentiel, et trop évident, Robinson n’est nommé qu’une fois. L’épigraphe, la chanson du voleur et les références aux textes sacrés hindous rattachent le roman à l’Inde et à ses valeurs, qui constituent l’un des pôles signifiants, le côté des parias que Léon (le Disparu, narrateur second, épousera en même temps que Suryavati. Un autre aspect de l’intertexte se rattache aux deux figures de Rimbaud, le jeune voyou de Paris et l’homme malade d’Aden. Le renvoi implicite à la formule « Je est un autre » accentue les complexités de l’énonciation et les glissements de l’identité. Les très nombreuses citations de poèmes soulignent la tendance poétique plus que narrative de l’écriture de Le Clézio. Tandis que les citations du « journal d’un botaniste » révèlent la nostalgie d’un discours descriptif savant et neutre. Ainsi, le vertige intertextuel manifeste et multiplie les contradictions dynamiques qui animent l’écriture de Le Clézio et contribuent à la production du sens.

  20. Ultrasonic testing of canning tubes in stainless steel of the EL 4 reactor; Controle par ultrasons des tubes de gaine en acier inoxydable du reacteur EL 4

    Energy Technology Data Exchange (ETDEWEB)

    Prot, A.; Monnier, P. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1964-07-01

    From all the methods possible for controlling thin cans the one chosen, for numerous reasons, vas that making use of ultrasonic techniques. A method has been developed which should make it possible to carry out a rapid and efficient industrial control of canning tubes, The reasons for the choice of the ultrasonic method are given in detail, together with the principles of the method and the actual control parameters. In the present state of our research, it should be possible to control at least 50 000 tubes a year. Improvements brought about in the details of the control technique itself should make it possible to increase this rate considerably. (authors) [French] Parmi toutes les methodes possibles de controle des gaines minces, le procede retenu pour de multiples raisons a ete celui faisant appel a la technique des ultrasons. Une methode a ete mise au point qui doit permettre un controle industriel rapide et efficace des tubes de gaine. Sont exposes en detail, les raisons du choix de la methode par ultrasons, les principes de cette methode et les parametres du controle proprement dit. Dans l'etat actuel de nos etudes la cadence devrait permettre le controle de 50000 tubes par an au minimum. Des ameliorations de detail portant sur la technique de controle elle-meme, doivent permettre d'accelerer tres notablement cette cadence. (auteurs)

  1. Le biblioteche di Luigi Crocetti

    Directory of Open Access Journals (Sweden)

    Tommaso Giordano

    2015-05-01

    Full Text Available This article is the text read at the presentation of the book Le Biblioteche di Luigi Crocetti, saggi, recensioni, paperoles (The Libraries of Luigi Crocetti, essays, reviews, paperoles, AIB, 2014, edited by Laura Desideri and Alberto Petrucciani.Luigi Crocetti (died in 2007 was one of the most eminent personalities in the Italian library world of the last fifty years. Some of the most significant milestones of his career are: Director of the Laboratory of Restoration at The National Central Library in Florence, after the flood of the Arno river in 1966; Director of the Library and Archives Department of the Tuscany regional government; President of the Italian Library Association (AIB, Director of the Gabinetto G.P. Vieusseux. Crocetti was also leader of, or influential partner in, the major projects and programs developed in Italy during his professional life, including: the DDC 20 Italian Edition, the project SBN (the Italian Library Network, Editor of the journal Biblioteche Oggi , as well as collaborator in various journals and publishing activities. The numerous writings of Luigi Crocetti, published throughout his professional life, register punctually the evolution of libraries and librarian profession in times of major technological, cultural and social changes. Nevertheless Crocetti’s writings are not only an historical record of a perceptive (and committed observer; they also constitute a collection of profound reflections and inspiring input for further discussion on the role of libraries and of culture in the society. Gifted with uncommon erudition, Crocetti shows an extraordinary ability to interpret the current reality and for see the future with a remarkable farsightedness. His writings touch on all aspects of the profession, from book preservation and restoration to public libraries, from cataloguing and indexing to library cooperation and networking, from national libraries, archives and museums, to user services. It is quite

  2. Judith Butler, Défaire le genre

    OpenAIRE

    Van Woerkens, Martine

    2008-01-01

    Dans le Dictionnaire critique du féminisme paru en France en 2000, à l’entrée « Sexe et genre », Judith Butler figure dans la rubrique « dérives du genre ». Gender trouble « dépasse le genre, en brouillant, “troublant” les catégories de sexe et de sexualité », et l’auteure y privilégie « les aspects symboliques, discursifs et parodiques du genre au détriment de la réalité matérielle et historique des oppressions subies par les femmes » (pp. 197-198). Dans ce dictionnaire, le racisme est renvo...

  3. Le dialogisme intertextuel des contes des Grimm

    OpenAIRE

    2012-01-01

    « Le caractère le plus important de l’énoncé, ou en tous cas le plus ignoré, est son dialogisme, c’est-à-dire sa dimension intertextuelle », constate Todorov en référence à la conception dialogique du langage proposée par Bakthine. Cet article introductif postule que ce constat s’applique aussi aux contes des Grimm. En partant des recherches déjà menées sur Apulée, Straporola, Basile, Perrault, La Fontaine et Lhéritier, il présente des concepts (réponse intertextuelle, reconfiguration génériq...

  4. Le nom propre dans les manuscrits saussuriens

    Directory of Open Access Journals (Sweden)

    Henriques Stefania

    2012-07-01

    Full Text Available On sait que le signe, selon l’optique saussurienne, est constitué par l’union arbitraire entre signifiant et signifié. Ces deux entités sont psychiques et l'une n’existe qu’en fonction de l’autre. À partir de la délimitation de ces éléments et de l’affirmation que le rapport entre eux est arbitraire, Ferdinand de Saussure rend la référence « non appartenant » au fonctionnement linguistique. Cependant, il y a des indices que Ferdinand de Saussure admet, au moins une fois, la conception triadique du signe (conception aristotélicienne quand il traite des noms propres et des noms géographiques/toponymes. En plus, dans la période entre 1900 et 1904, le linguiste genevois a eu comme thème principal de ses études la catégorie linguistique des noms propres et des noms géographiques. En visant l’importance de ce thème dans les Sciences du Langage (La Linguistique et La philosophie du langage et l’actuelle réorientation de l’étude des manuscrits saussuriens, on propose de rechercher le traitement donné par Ferdinand de Saussure à la catégorie du nom propre et du nom géographique, dans le manuscrit « Notes item. Sôme et sème » présent dans l’archive Ms. Fr. 3951 archivé à la Bibliothèque de Genève, dans le but de comprendre de quelle façon cette catégorie linguistique est traitée et si, effectivement, elle constitue une exception à la théorie générale des signes.

  5. Characteristics of transgenic tomatoes antisensed for the ethylene receptor genes LeERT1 and LeERT2

    Institute of Scientific and Technical Information of China (English)

    WANG Zhong-feng; YING Tie-jin; ZHANG Ying; BAO Bi-li; HUANG Xiao-dan

    2006-01-01

    Two stable transformed lines containing antisense LeERT1 or LeERT2 sequences and their hybridized line were investigated to determine the effect of LeERT1 and LeERT2 specificity in the ethylene receptor family in tomato (Lycopersicon esculentum Mill.) on ethylene signaling. The transgenic line alel containing antisense LeERT1 displayed shorter length of seedling grown in the dark and adult plant in the light, severe epinastic petiole, and accelerated abscission of petiole explant and senescence of flower explant, compared with its wild type B1. The transgenic line ale2 containing antisense LeERT2 also exhibited shorter hypocotyls and slightly accelerated abscission. The phenotypes of cross line dale of LeERT1 and LeERT2 were close to alel in many aspects. These results suggested that LeERT1 probably plays a relatively important role in ethylene signaling of tomato growth and development.

  6. Le continu contre l'espace

    Science.gov (United States)

    Salanskis, Jean-Michel

    Disons pour conclure que, en tout état de cause, la façon de concevoir philosophiquement le conflit du continu et de l'espace que nous avons trouvée chez Hegel n'est pas homogène avec le style et les modalités de la pensée mathématique: 1) d'une part, le lien classique, le lien de référence entre continu et espace en mathématiques n'est pas que l'espace serait premier et privé de pensée, et le continu second, venant dissoudre l'espace en apportant la qualité, l'infini et la pensée, mais tout au contraire, il consiste en ce que l'espace est fondé sur l'abîme infinitaire du continu ; 2) d'autre part, l'éventuel divorce entre l'espace et le continu dans l'aire mathématique n'est pas celui d'une réflexivité purement conceptuelle du continu avec un positivisme géométrique, n'équivaut pas à une rupture disciplinaire ; il est plutôt le symptôme de la dérive d'une herméneutique à l'égard d'une autre, au sein d'un continent juridique commun définissant la discipline (la mathématique ensembliste), cette dérive pouvant, à la limite, induire une refonte de ce sol juridique, sans que jamais il soit question pour autant de nier l'unité des mathématiques, à comprendre ici comme l'unité ultime de responsabilité de la communauté mathématique à l'égard des trois questions Qu'est-ce que l'espace?”, “Qu'est-ce que le continu?” et “Qu'est-ce que l'infini?”.

  7. Le football africain entre immobilisme et extraversion

    OpenAIRE

    Poli, Raffaele; Dietschy Paul

    2007-01-01

    Symbole de l’espoir national des États d’Afrique aux indépendances, le football africain s’est radicalement transformé : lors de la Coupe du monde de 1970, aucun des joueurs zaïrois n’évoluait à l’étranger ; en 2006, aucun des footballeurs ivoiriens ne joue dans son pays. Pour comprendre la dynamique de cette extraversion grandissante, il faut prendre en compte un enchevêtrement de facteurs – l’implication d’acteurs locaux dans le transfert de joueurs à l’étranger, la bienveillante attention ...

  8. Le café en Colombie

    OpenAIRE

    Gilhodes, Pierre

    2003-01-01

    Depuis un siècle, la Colombie produit du café ; elle en est devenue le second exportateur mondial. Au cours de la décennie qui vient de s'achever, le marché mondial du café s'est retourné au bénéfice des producteurs. Cette situation nouvelle a facilité une révolution des pratiques de culture qui est en train de bouleverser les conditions de production de ce grain dans les plantations colombiennes. Sans doute au prix de l'éviction de nombreux petits producteurs, sont en train d'émerger ...

  9. dynamiques migratoires et rapport avec le

    African Journals Online (AJOL)

    _perçu comme un problème majeur dans le pays d'accueil; au contraire, il a été ... une stratégie de sortie de .l'éeoznornie rurale par une scolarisation massive .... bétail (caprins et de bovins) mais qui, après son départ, est utilisé en priorité par ... l'apprentissage de Pintégration, car en réalité, le 'retour' au pays constitue.

  10. LE JAZZ ET L'INSTITUTION

    OpenAIRE

    Calamel, Charles

    2016-01-01

    International audience; Utiliser l'art comme composante de l'humanité, qui est la finalité de ce colloque symbolisant les trente ans de l'ADAGE, m'invite à poser le jazz et l'institution comme un axe dialectique permettant de raisonner sur les dimensions sociales de ces deux mondes interactifs. Ainsi créée, la dialectique jazz et institution propose aux responsables de cette journée d'interroger le travail social et médico-social en institution, du point de vue des dimensions sociales qui son...

  11. Bartole, le Diable et le Tibre. Un cas de libertinage juridique

    Directory of Open Access Journals (Sweden)

    Jérémie Barthas

    2011-01-01

    Full Text Available Dans une fantaisie juridique, le grand juriste médiéval Bartole de Sassoferrato met en scène le procès du Diable revendiquant, devant le Christ, la possession du genre humain. Le Diable fonde cette revendication sur la Genèse. Cet essai propose d’inscrire cette fantaisie juridique à tonalité irréligieuse à l’intérieur des traités formant le livre De Tyberiadis et de le resituer dans le contexte géo-politique de la défense contre la reconstruction de l’hégémonie pontificale en Italie centrale.A legal fantasy of the famous medieval jurist Bartolus of Sassoferrato presents the trial of the Devil who claims, before Christ, ownership on humankind. As his main title, the Devil shows the Book of Genesis. This essay offers a first attempt to link this legal irreligious fantasy with Bartolus’book De Tyberiadis, as recently described by Prof. Osvaldo Cavallar, and proposes consequently its geo-political reading.

  12. Le jeu de la création : Le mangeur (2005 de Ying Chen

    Directory of Open Access Journals (Sweden)

    Nicole Dunham

    2013-11-01

    Full Text Available Le théoricien James Hans définit le jeu comme une déconstruction structurante, un processus de perpétuelle remise en question. Dans Le Mangeur (2005 de Ying Chen, la narratrice revit un épisode d’une de ses vies passées où elle meurt mangée, avalée, par son père, descendant dans le « tunnel » du ventre de ce dernier. Cependant, suite à cet événement, elle se retrouve dans un autre espace-temps où elle rencontre son mari, A.. Une équivalence s’établit dans le roman entre les éléments suivants : le ventre du père, les tableaux peints par ce dernier et l’espace-temps de A., et la fenêtre. Ces éléments deviennent des aires de jeu, remettant en question les concepts de l’intérieur et de l’extérieur et du créateur et de l’œuvre. En nous servant du texte « Le Tunnel » écrit par Ying Chen, nous démontrerons que cette notion du jeu s’applique également à l’ensemble de son œuvre.

  13. Identified Particle Spectra for Au+Au Collisions at $\\sqrt{s}$ = 200 GeV from STAR, PHENIX and BRAHMS in Comparison to Core-Corona Model Predictions

    CERN Document Server

    Schreiber, C; Aichelin, J

    2010-01-01

    The core-corona model describes quite successfully the centrality dependence of multiplicity and $$ of identified particles observed in heavy ion reaction at beam energies between $\\sqrt{s}$ = 17 GeV and 200 GeV. Also the centrality dependence of the elliptic flow, $v_2$, for all charged and identified particles could be explained in this model. Here we extend this analysis and study the centrality dependence of single particle spectra of identified particles. We concentrate here on protons, antiprotons, kaons and pions which have all been measured by the PHENIX, STAR and BRAHMS collaborations. We find that an analysis of the spectra in the core-corona model suffers from differences in the data published by the different experimental groups, notably for the pp collisions. For each experience the data agree well with the prediction of the core-corona model but the value of the two necessary parameters depends onthe experiments.

  14. Le stéréotype dans le roman policier

    Directory of Open Access Journals (Sweden)

    Marion François

    2009-12-01

    Full Text Available Le roman policier offre à l’étude du stéréotype une grande variété de redondances, lexicales et structurelles, qui permettent d’éclairer le concept même de genre, en fait issu du constat de stéréotypie. Il est également manifeste que contrairement aux idées reçues, les clichés font du texte policier un texte littéraire, parce qu’ils naissent d’images associées, distinctes de la réalité, qui révèlent d’ailleurs le cheminement même de l’écriture. Par ailleurs ces images jouent un rôle fondamental dans le plaisir du lecteur, comme dans les contes de fées de notre enfance. Les clichés ouvrent la porte des fantasmes : le stéréotype rejoignant l’archétype, les clichés policiers réactivent de nombreux mythes, le texte évoquant l’Autre Scène. Le constat de stéréotypie provoque l’écriture, en particulier parodique, et stimule le renouvellement et l’essaimage des clichés dans toutes sortes de textes, qui bénéficieront de la présence du déjà-lu, laquelle donne au lecteur une assise pour affronter l’inconnu et une expérience pour apprécier la nouveauté.

  15. Stability of simultaneous modified LeFort III/LeFort I osteotomies.

    Science.gov (United States)

    Schmitz, J P; Tiner, B D; Van Sickels, J E

    1995-10-01

    The objective of this study was to examine maxillary skeletal stability after simultaneous modified LeFort III/LeFort I osteotomy in patients who presented for the simultaneous correction of midface and maxillary hypoplasia. Eleven patients underwent simultaneous modified LeFort III/LeFort I osteotomies using transoral and transconjunctival surgical approaches. The mean net surgical movement at A point (A pt) was 5.2 mm anteriorly and 2 mm inferiorly. Titanium mini-plates were used to stabilize both the midface component and the LeFort I segment; iliac crest or calvarial bone grafts as well as freeze-dried cancellous blocks were used at the zygoma and lateral orbital rim regions. All patients had lateral cephalometric radiographs taken immediately postoperatively, and at their sixth week, sixth month, and one year follow-up visits. Five maxillary landmarks (CI, A pt, ANS, PNS, and 2M) were used to examine the horizontal and vertical changes occurring at each time period. The central incisor relapsed vertically 2.8 mm at six months, A pt relapsed vertically 2.3 mm at six months, ANS relapsed posteriorly 1.6 mm at 6 weeks, PNS relapsed 1.5 mm anteriorly at one year. This study demonstrated that the maxilla moved anteriorly 1.5 mm and superiorly 2.8 mm in simultaneous modified LeFort III/LeFort I osteotomies performed with mini-plate fixation and bone grafts. This movement should be considered when planning and performing simultaneous surgical movement of the maxilla and midface using modified LeFort II/LeFort I osteotomies. Appropriate occlusal overcorrection at the time of surgery is necessary.

  16. Le Peer to Peer: Vers un Nouveau Modèle de Civilization

    Directory of Open Access Journals (Sweden)

    Michel Bauwens

    2006-06-01

    Full Text Available Le « peer to peer » est la dynamique intersubjective caractéristique des réseaux distribués. Le but de cet essai est de montrer qu'il s'agit d'une véritable nouvelle forme d’organisation sociale, apte à produire et échanger des biens, à créer de la valeur. Celle-ci est la conséquence d'un nouvel imaginaire social, et possède le potentiel de devenir le pilier d'un nouveau mode d'économie politique, voire d'un nouveau type de civilisation. Pour cela, nous allons d'abord définir le P2P, décrire en bref ces manifestations, et le différencier d'autres modalités d'échange intersubjectif tel que le marché, la hiérarchie, l'économie du don.Comme principale modalité P2P nous distinguons: Les processus de production P2P, comme troisième mode de production, qui n'est ni géré par un mode hiérarchique ou par l'état, ni répondant à des impératifs de profit ou qui sont modulés par le biais des prix. Les processus de gouvernance P2P, qui gouverne ces processus de production. Les formes de propriété P2P, qui sont destine a empecher l’appropriation prive de cette production pour le commun.Afin d’examiner les characteristiques de cette nouvelle dynamique sociale, nous utilisons la typologie intersubjective de l’anthropologue Alan Page Fisque, qui distingue: 1. l'échange égalitaire (Equality Matching, c..a.d l’economie du don. 2. La relation d’autorité (Authority Ranking tel qu’elle s’exprime dans le mode hierarchique. 3. le marché (Market Pricing. 4. la participation commune (Communal Shareholding.En conclusion, nous examinons les possibilites d’expansion de ce nouveau mode sociale et son insertion dans l’economie capitaliste, en nous nous posons la question: le P2P peut-il etre concu comme alternative sociale et economique aux modeles existants.

  17. La science, la littérature, le rituel: le vrai dire et le plus que mentir

    Directory of Open Access Journals (Sweden)

    Panagiotis Christias

    2005-03-01

    Full Text Available Le scientifique promet la vérité sans être en mesure d'accomplir sa promesse tandis que l'écrivain promet de mentir mais par son mensonge, il fait plus que mentir. Il ne dit certainement pas la vérité, car la vérité n'est pas sa préoccupation première. Voilà comment nous pouvons résumer les deux attitudes, condamnées à un antagonisme stérile par l'attitude positiviste moderne. Compte tenu donc de l'intention fondatrice de la science, de sa promesse donc originaire et fondatrice, la science doit dire la vérité et rien que la vérité. Ce qui, de l'aveu même de cette même science, est impossible. [...] La littérature se permet de reconstruire des mondes par-delà le vrai et le faux. [...] Un récit littéraire ne demande pas la consécration de la vérité, ne demande pas à être suivi parce que vrai, n'impose rien et n'attend rien. Sa vraie destinée est l'errance et sa vraie conscience est celle de sa dissémination. Celui qui renonce à la prétention de vérité renonce en même temps à la volonté de dominer. Dominer signifie créer un espace de vérité dans lequel celui qui énonce la vérité est le maître légitime de ceux qui sont dans le champ de la conception du monde dont cette vérité est la pierre angulaire.

  18. Le Francais Courant: Part V, French.

    Science.gov (United States)

    Dade County Public Schools, Miami, FL.

    Instructional objectives of the Dade County Public Schools Quinmester Program in French for use with "Le Francais Courant: Part 5" focus on the development of mastery of the basic numbering system and other grammatical structures. Structures include the formation of the present tense of the irregular verbs…

  19. Le Chatelier--Right or Wrong?

    Science.gov (United States)

    Helfferich, Friedrich G.

    1985-01-01

    Presents a class exercise designed to find out how well students understand the nature and consequences of the mass action law and Le Chatelier's principle as applied to chemical equilibria. The exercise relates to a practical situation and provides simple relations for maximizing equilibrium quantities not found in standard textbooks. (JN)

  20. Le Chatelier's Principle, Temperature Effects, and Entropy.

    Science.gov (United States)

    Campbell, J. Arthur

    1985-01-01

    One of the most useful methods of understanding chemical equilibria is provided by Le Chatelier's principle. The relationships between this principle, temperature, and entropy are discussed. Tables with thermodynamic data for some net reactions commonly used to illustrate the principle and for reactions involving gases are included. (JN)

  1. Microscopic Description of Le Chatelier's Principle

    Science.gov (United States)

    Novak, Igor

    2005-01-01

    A simple approach that "demystifies" Le Chatelier's principle (LCP) and simulates students to think about fundamental physical background behind the well-known principles is presented. The approach uses microscopic descriptors of matter like energy levels and populations and does not require any assumption about the fixed amount of substance being…

  2. Le Chatelier's principle in replicator dynamics

    Science.gov (United States)

    Allahverdyan, Armen E.; Galstyan, Aram

    2011-10-01

    The Le Chatelier principle states that physical equilibria are not only stable, but they also resist external perturbations via short-time negative-feedback mechanisms: a perturbation induces processes tending to diminish its results. The principle has deep roots, e.g., in thermodynamics it is closely related to the second law and the positivity of the entropy production. Here we study the applicability of the Le Chatelier principle to evolutionary game theory, i.e., to perturbations of a Nash equilibrium within the replicator dynamics. We show that the principle can be reformulated as a majorization relation. This defines a stability notion that generalizes the concept of evolutionary stability. We determine criteria for a Nash equilibrium to satisfy the Le Chatelier principle and relate them to mutualistic interactions (game-theoretical anticoordination) showing in which sense mutualistic replicators can be more stable than (say) competing ones. There are globally stable Nash equilibria, where the Le Chatelier principle is violated even locally: in contrast to the thermodynamic equilibrium a Nash equilibrium can amplify small perturbations, though both types of equilibria satisfy the detailed balance condition.

  3. Le genre Sivanasua (Lophocyoninae, Hyaenodontidae, Creodonta, Mammalia)

    OpenAIRE

    Ginsburg, L.; Morales, Jorge

    1999-01-01

    Two upper teeth from the lower Miocene of Le Chêne de Navère (Gers, France) are interpreted as M1 and M2 of Sivanasua viverroides. The genus is known in Europe by two species. The origin of the Lophocyoninae is re-evaluated. We consider the group as rooted in some African hyaenodontoid Creodonta.

  4. Le radici classiche della meccanica quantica

    CERN Document Server

    Ferretti, Bruno

    1980-01-01

    Due sono state le scoperte che hanno rivoluzionato la fisica del nostro secolo : la relatività e la meccanica quantica. Quest'ultima è quella che sino ad oggi ha avuto il più grande numero di conseguenze verificabili e anche la maggior carica rivoluzionari nel pensiero scientifico. L'insegnamento di quest a disciplina presenta tuttora notevoli difficoltà.

  5. "Le CERN restera un grand employeur"

    CERN Multimedia

    Monin, V

    2002-01-01

    "Pour le porte-parole du CERN, la suppression de 600 postes d'ici 2007 était prévue depuis bien longtemps. Il s'agit de départs en retraite qui ne sont en aucun cas liés au dépassement du budget du LHC" (1 page).

  6. Antimicrobiële eiwitten in speeksel

    NARCIS (Netherlands)

    W. van 't Hof; E.C.I. Veerman

    2014-01-01

    Speeksel bevat verschillende eiwitten en peptiden met antimicrobiële eigenschappen. In kwantitatief opzicht de belangrijkste zijn: Daarnaast bevat speeksel ook bacteriebindende eiwitten, onder andere immuunglobulinen, die hun kolonisatie in de mond remmen. Lysozym: breekt mureïne in de celwand af en

  7. Le attuali prospettive del diritto ecclesiastico italiano

    OpenAIRE

    Valerio Tozzi

    2011-01-01

    SOMMARIO: 1. Ai miei tempi … - 2. Le innovazioni istituzionali dopo gli anni settanta– 3. I problemi di oggi – 4. Immigrazione, pluralismo culturale e confessionismostrisciante – 5. Verso quali assetti futuri andrà il diritto ecclesiastico? – 6. La Dottrina ela società.

  8. Le attuali prospettive del diritto ecclesiastico italiano

    Directory of Open Access Journals (Sweden)

    Valerio Tozzi

    2011-02-01

    Full Text Available SOMMARIO: 1. Ai miei tempi … - 2. Le innovazioni istituzionali dopo gli anni settanta– 3. I problemi di oggi – 4. Immigrazione, pluralismo culturale e confessionismostrisciante – 5. Verso quali assetti futuri andrà il diritto ecclesiastico? – 6. La Dottrina ela società.

  9. The PHENIX Time Expansion Chamber

    Energy Technology Data Exchange (ETDEWEB)

    Rosati, M.; Barish, K.; Botelho, S.; Chang, W.C.; Gogoi, A.L. de; Dietzsch, O.; Ferdousi, T.; Franz, A.; Fung, S.Y.; Gannon, J.; Harder, J.; Kandasamy, A.; Khomutnikov, A.; Kotchekov, D.; Lebedev, A.; Li, X.H.; Mahon, J.; Munirassimann, M.; Negrin, J.; O' Brien, E.; O' Connor, P.; Pisani, R.; Rankowitz, S.; Seto, R.; Takagui, E.M.; Wang, H.Q

    1999-12-27

    The TEC/TRD subsystem will track all charged particles and contribute to the particle identification by the measurement of energy loss. The design, construction and testing of the TEC chambers are described.

  10. The PHENIX Time Expansion Chamber

    CERN Document Server

    Rosati, M; Botelho, S; Chang, W C; Gogoi, A L D; Dietzsch, O; Ferdousi, T; Franz, A; Fung, S Y; Gannon, J; Harder, J; Kandasamy, A; Khomutnikov, A; Kotchekov, D; Lebedev, A; Li, X H; Mahon, J; Munirassimann, M; Negrin, J; O'Brien, E; O'Connor, P; Pisani, R; Rankowitz, S; Seto, R; Takagui, E M; Wang, H Q

    1999-01-01

    The TEC/TRD subsystem will track all charged particles and contribute to the particle identification by the measurement of energy loss. The design, construction and testing of the TEC chambers are described.

  11. AGARD Flight Test Techniques Series. Volume 5. Store Separation Flight Testing

    Science.gov (United States)

    1986-04-01

    Tomes) T 1 Le reacteur T 2 Le turbopropulseur Installation des turbomoteurs sur helicopteres Apercu sur les pneumatiques et leurs proprietes...L’atterrissage et le probleme du freinage Manuel de medicine aeronautique Conditions de calcul des structures d’avions Technologie helicoptere Tl

  12. Le détroit de Gibraltar

    Directory of Open Access Journals (Sweden)

    Guillaume Le Boedec

    2008-02-01

    Full Text Available Les assauts sur les grillages de Ceuta et Melilla à l’automne 2005 et le flux continu de migrants vers les îles Canaries en 2006 (+574% par rapport à 2005 ont, par leur surmédiatisation, défini une nouvelle perception du phénomène migratoire. Depuis le début des années 1990, le détroit de Gibraltar, marge naturelle de l’Europe, s’était affirmé comme le point nodal, la centralité, de l’immigration clandestine transméditerranéenne. Il capte et diffuse, depuis l’apparition de la frontière commune de l’Europe Schengen, toutes les évolutions juridiques et techniques mises en place par l’Union européenne pour lutter contre les migrations illégales. Véritable laboratoire de l’externalisation de la politique migratoire européenne et de la coopération maghrébine, le détroit de Gibraltar s’est imposé comme l’espace modèle de la « frontièrisation » de l’espace Schengen, mais aussi le symbole de son inefficacité. La réactivité des migrants et leur capacité à contourner les dispositifs européens soulignent l’impuissance d’une politique de fermeture menée sans projet de développement des pays émetteurs.As they received much media coverage, the assaults on the fences at Ceuta and Melilla in autumn 2005 and the continuous flow of migrants to the Canary Islands in 2006 defined a new perception of migratory phenomena. Since the beginning of the 90’s, the Strait of Gibraltar, the natural limit of Europe, had become the nodal point, the very centre, of transmediterranean illegal immigration. Since the apparition of the common frontier of Schengen, it has caught and spread all legal and technical evolutions set by the European Union to fight illegal migrations. A real testing laboratory for the outsourcing of European migratory policy and of Maghreb cooperation, the Strait of Gibraltar has emerged as a model «frontier-setting» in the Schengen zone, but also as the symbol of its lack of efficiency

  13. Intelligence artificielle et agents collectifs : le modèle EUROSIM

    Directory of Open Access Journals (Sweden)

    Denise Pumain

    2007-07-01

    Full Text Available EUROSIM est un modèle multi-agents conçu pour simuler l’évolution à moyen terme du système des villes européennes. Les agents sont des entités collectives, les grandes villes caractérisées par leur taille et leur fonction dans le système des villes, et dont les interactions (échanges modulés par des relations de proximité ou de réseau déterminent la dynamique relative, tandis que la croissance d’ensemble dépend de l’innovation. Des outils d’analyse multiscalaire ont été développés afin d’interpréter les sorties du modèle et faciliter le calibrage.

  14. Luther contre le protocole de Kyoto ou le retour des « indulgences ».

    Directory of Open Access Journals (Sweden)

    Bernard Jouve

    2005-05-01

    Full Text Available Le 16 février 2005 a marqué la mise en œuvre du Protocole de Kyoto. En fait, depuis l’annonce par la Russie, le 25 octobre 2004, de sa décision de ratifier ce protocole, l’affaire était entendue. Menacé depuis le refus des États-Unis, l’un des plus grands pollueurs de la planète, de ne pas le ratifier pour des raisons purement économiques alors que ce pays produit à lui seul 40 % des gaz à effet de serre ( ges , l’accord survenu à Kyoto en 1997 est enfin entériné et ...

  15. Communication intentionnelle dans le domaine du leadership

    Directory of Open Access Journals (Sweden)

    Sophie Ménard

    2013-12-01

    Full Text Available L’existence de toute organisation repose sur le soutien que lui accordent ses membres. Le fonctionnement optimal d’un système est tributaire de la qualité des relations entre ses composantes, c’est-à-dire, pour une organisation, entre ses différents paliers. La qualité de ces relations présente des avantages concurrentiels sur les plans économique, politique et social, car elles se traduisent par une communication claire, directe et régulière entre les niveaux hiérarchiques. Pour les dirigeants, il s’agit de leur capacité à exercer leur leadership. Cette communication a un impact sur le développement des compétences des employés, la productivité de l’entreprise et sa visibilité stratégique dans la sphère politique et, enfin, sur l’attraction et le maintien d’une main-d’œuvre qualifiée et engagée. Il va sans dire qu’au 21e siècle, l’avènement des médias sociaux rend plus délicate la tâche des gestionnaires et présente ainsi un défi bien plus important que la mise en place de bonnes relations de travail qu’on préconisait au siècle dernier. Les auteurs aborderont le leadership autoral comme alternative en vue d’un leadership de conscience plus adapté aux défis des organisations du siècle actuel.

  16. Le devenir actif du corps affectif

    Directory of Open Access Journals (Sweden)

    Pascal Séverac

    2005-09-01

    Full Text Available Le but de cet article est de saisir ce que signifie, pour le corps, être actif. À partir de la proposition 49 de la partie IV de l’Éthique, on propose de distinguer deux manières d’appréhender le corps – soit comme corps organique, soit comme corps affectif -, et l’on montre que la question éthique du devenir actif s’adresse à la dimension affective du corps. Il faut penser le devenir actif du corps affectif comme augmentation de son aptitude non seulement à affecter, mais aussi à être affecté. En effet, être affecté pour le corps n’est pas identique à pâtir : au contraire, plus est grande l’ouverture sensible d’un corps aux autres corps, plus est grande son activité éthique.The aim of this paper is to understand how the body can be active. With the proposition 49 of the fourth part of Ethics, two ways of conceiving of the body are distinguished : like an organic body or like an affective body. The ethics question of becoming active is about the affective body. This becoming active must be understood as increasing of the ability to affect, as well as to be affected. To be affected is different from to be passive. On the contrary, the more the body is able to be affected, the more he becomes active.

  17. Kuidas kirjutatakse ajalugu? / Jacques Le Goff ; interv. Marek Tamm

    Index Scriptorium Estoniae

    Le Goff, Jacques

    2007-01-01

    Prantsuse ajaloolase ja ajakirja Annales ühe peatoimetaja J. Le Goff'i teostest. Varem. ilm.: Ajalugu, antropoloogia ja imaginaarsus : intervjuu Jaques Le Goffiga // Le Goff, Jacques. Raha või elu : majandus ja religioon keskajal. - Tallinn, 2001. - Lk. 108-126

  18. CORRÉLATION ENTRE LE FROTTEMENT INTÉRIEUR ET LE COEFFICIENT DE DILATATION LORS DES TRANSFORMATIONS MARTENSITIQUES ISOTHERMES

    OpenAIRE

    Prioul, C.; De A. Rodrigues, C.A.V.; Plusquellec, J.

    1983-01-01

    Nous montrons que le frottement intérieur est proportionnel au coefficient de dilatation lors de la transformation martensitique isotherme d'alliages Fe-Ni-C. Ce résultat montre que le formalisme proposé par Delorme dans le cas des transformations martensitiques athermiques peut être étendu aux transformations martensitiques de type isotherme.

  19. Le Kongo de Sony Labou Tansi

    Directory of Open Access Journals (Sweden)

    Céline Gahungu

    2015-02-01

    Full Text Available Les textes inédits de Sony Labou Tansi proposent une réflexion sur l’histoire, et plus singulièrement sur celle du Kongo. Le souvenir du prestigieux royaume apparaît dès les premiers manuscrits, composés au début des années 1970. Loin d’être circonscrit aux écrits de jeunesse, le Kongo surgit sous de multiples formes dans le dédale des textes rédigés au cours des années suivantes. Cette fascination pousse l’écrivain dans une dynamique de recherche esthétique : comment évoquer cet illo tempore mythique sans sacrifier à une historicité convenue ? Comment inventer une écriture en mesure de rendre compte du fabuleux royaume ?L’analyse littéraire ne peut cependant faire fi du contexte politique dans lequel Sony Labou Tansi s’inscrit. Outre sa dimension historique et toponymique, Kongo est un ethnonyme dont l’auteur s’est réclamé. Celui-ci a revendiqué à de nombreuses reprises son appartenance à une identité kongo au point de s’être engagé, à la fin des années 1980, dans les rangs du MCDDI1. Ce discours identitaire et l’adhésion à un parti ethnique ont troublé l’image d’un auteur volontiers perçu comme un démocrate véritable. Est-il possible d’articuler le Kongo littéraire et le Kongo politique ? Le Kongo, dont l’ombre portée apparaît dans les manuscrits littéraires mais également dans les articles et les déclarations politiques, pourrait-il nous aider à saisir les enjeux de l’écriture protéiforme de Sony Labou Tansi ?

  20. Iodine induced stress corrosion of zirconium and zircaloy-4 mechanisms. Translation to pellet cladding interaction conditions in PWR type reactors; Mecanismes de corrosion sous contrainte par l`iode dans le zirconium et le zircaloy-4. Transposition aux conditions d`interaction pastille-gaine dans les reacteurs a eau pressurisee

    Energy Technology Data Exchange (ETDEWEB)

    Fregonese, M

    1997-10-08

    This thesis is linked to the study of the Pellet-Cladding Interaction (PCI) phenomenon in Pressurized Water Reactors, which can lead to cladding rupture by iodine Stress Corrosion Cracking (SCC) of Zircaloy-4. Results are obtained through slow tensile tests performed in iodine methanol and in iodine vapour, on reference material, neutron irradiated material, and iodine zirconium implanted material. They allow to propose an explanation of the rapidity of the ruptures observed during PCI loadings, and to make the link between laboratory SCC tests and power ramp tests. Indeed, neutron irradiation facilitates the initiation and the transgranular propagation steps of the SCC cracks, due to strain localization and hardening associated to the presence of irradiation defects. On the other hand, recoiled iodine does not seem to affect SCC susceptibility of the material. On a chemical point of view, thermally released iodine is then responsible for PCI/SCC ruptures. A detailed calculation of iodine amount created by fission and released in the gap during irradiation makes it possible to show that local iodine concentration facing the pellet-to-pellet and the radial pellet cracks regions is sufficient for SCC cracks to develop in the metal. Finally, a competition between re-passivation and cracking is underscored. This results are in good agreement with the occurrence of an iodine adsorption mechanism. Adsorption could be assisted by a corrosion-deformation interaction phenomenon, and/or by the formation of solid and gaseous zirconium iodides. (author) 132 refs.

  1. The fast neutrons reactors, the sodium, the fuel cycle: evaluation of the knowledge, innovation potential and forecast; Les reacteurs a neutrons rapides, le sodium, le cycle du combustible: bilan de l'acquis, potentiel d'innovation et perspectives d'avenir

    Energy Technology Data Exchange (ETDEWEB)

    Moreau, J

    2002-07-01

    This document presents the study, the design and the construction of fast neutrons reactors, cooled with sodium. From this evaluation, it details the innovation possibilities of this sector in the sustainable development context of the nuclear energy. Chapter one presents the physical and physico-chemical properties of the sodium. Chapter two analyzes the properties of the fast cores and the sodium advantages. Chapter three analyzes the great contribution of the EFR project. Chapter four takes stock on the innovation possibilities. And before the conclusion, chapter five shows that the fast neutrons reactors allow the electric power production in agreement with a sustainable development. (A.L.B.)

  2. La construction de la matière le modèle Standard

    CERN Document Server

    Léon, Jacques

    2016-01-01

    Qu'est-ce que la matière ? Voilà une question à laquelle il pourrait sembler facile de répondre car il n'est rien de plus concret que la matière. Et pourtant, la réponse qu'en donne la physique contemporaine est pour le moins déconcertante ! Le concept-même de particules, briques élémentaires de la matière, s'est volatilisé, dissout dans des objets mathématiques abstraits et abscons pour les non-initiés. Plus nos théories sont précises et plus l'image qu'elles nous renvoient est insaisissable. En un siècle, la représentation des particules s'est métamorphosée en nuages de probabilité portés par des champs quantiques régis par des symétries confinées dans des espaces abstraits. Mais dans un même temps, nous avons réussi le tour de force d'expliquer toute cette complexité avec seulement 16 particules… et une seule théorie, véritable construction de notre conception de la matière : le modèle standard. Ce livre tente de guider le lecteur dans le dédale de la physique des particu...

  3. Le mythe du bon sauvage Hottentot

    Directory of Open Access Journals (Sweden)

    M-J Boisacq

    1993-05-01

    Full Text Available Two themes in the Voyage á l'intérieur de I'Afrique par le Cap de Bonne-Espérance by Francois le Vaillant, 1790, attracted our attention: firstly, the criticism of the colonial system, modelled on Denis Diderot's criticism, and secondly, the description of the Hottentot people according to the mythical vision of the tribes as suggested by Jean-Jacques Rousseau. A brief explanation of Diderot's anti-colonial ideas and of the myth of the ‘noble Savage' as suggested by Rousseau, will be followed by a critical analysis of the Voyage ... so as to prove that this work is in perfect agreement with the ideologies existing in France during the second half of the 18th century and in line with the reformist notions of the thinkers who reconcile humanity and self-interest.

  4. Le CFEY et après…

    Directory of Open Access Journals (Sweden)

    François Burgat

    2000-09-01

    Full Text Available La livraison des Chroniques Yéménites 2000 s'inscrit dans le droit fil de l'initiative heureuse prise en 1993 par Frank Mermier, tout en prolongeant un effort entrepris dans la livraison précédente : allégées des comptes rendus de recherche cantonnés désormais au rapport scientifique du Centre et à son site Internet, les Chroniques entendent plus que jamais présenter un vaste panorama de la recherche sur le Yémen ou de la production intellectuelle de ce pays. La revue est désormais dotée d'un...

  5. Le possédé spectaculaire

    OpenAIRE

    Aubin-Boltanski, Emma; Aubrée, Marion; Bernand, Carmen; Choron-Baix, Catherine; Claveyrolas, Mathieu; Coiffier, Christian; Dianteill, Erwan; Duco, Suzanne; D’Urso, Andrea; Giobellina Brumana, Fernando; Guigon, Gwénaële; Hell, Bertrand; Hooper, Steven; Kapchan, Deborah; Mauzé, Marie

    2011-01-01

    Le possédé est-il un comédien ou un fou? Telle est l’alternative qu’ont tenté de dépasser en leur temps Roger Bastide, Michel Leiris et Alfred Métraux. Ces trois anthropologues rejettent en effet l’approche psychiatrique de la possession où la transe est conçue comme un état psychopathologique ou une libération incontrôlée de pulsions ; ils acceptent en revanche à différents degrés l’aspect joué de la possession. Dès 1938, Leiris anticipe les développements sur le « vestiaire de personnalités...

  6. Le matérialisme scientifique

    Science.gov (United States)

    Meunier, Jean-François

    2004-03-01

    De nos jours, il arrive quotidiennement aux grands hommes d'avoir à fréquenter d'ignorants mortels épris d'une conviction maladive que la science est la grande responsable de tous les maux du monde. Évidemment sans physique atomique, il n'y aurait pas eu d'Hiroshima et sans révolution industrielle, pas de pollution et etc. Cependant, ces accusations envers le progrès technique sont tout à fait injustes, irréfléchies et, j'irai même jusqu'à dire, irresponsables, puisque le calcul, i.e. la planification, même la plus élémentaire, est ce qui caractérise le mieux, pragmatiquement, la société humaine. À mon avis, les problèmes sociaux tireraient plutôt leur origine de sciences sociales irréalistes, qui, concrètment, inspireraient ou serviraient d'alibis à ceux qui détiennent véritablement le pouvoir. Dans cet article, je tenterai donc de démontrer la meilleure véracité et efficacité du matérialisme scientifique. Cette doctrine, dont Mario Bunge est le plus illustre représentant, s'appuy sur les résultats théoriques et expérimentaux des sciences factuelles ainsi que sur l'exactitude logique des mathématiques, utilisées ici comme langage universel de l'expression des idées. Cette conception philosophique qui s'inspire principalement du modèle des théories physiques, stipule que les réalités sociales sont, comme tout autre réalité, matérielles, mathématisables et représentables comme des systèmes en interaction. En fait, le modèle des physiciens ayant historiquement fait ses preuves en matière de testabilité et de cohérence interne est proposé d'être appliquer aux sciences sociales, aujourd'hui scindées des sciences dites pures sous l'inspiration des pseudo penseurs néo-kantiens, phénoménologiques et post-moderne. Cette nouvelle approche permettrait ainsi d'évoluer plus exactement vers une compréhension des bases sociales et biologiques du comportement humain afin de développer une éthique sans cesse plus r

  7. Le changement de croyances extrêmes

    OpenAIRE

    Sauvayre, Romy

    2012-01-01

    Dans le domaine de l’adhésion et de la désadhésion à un mouvement marginal – appelé «secte» par les uns et «Nouveaux Mouvements Religieux» par les autres –, il semble mystérieux de voir un individu accepter des croyances et des pratiques perçues comme irrationnelles, alors que la désadhésion est vue comme un retour «normal» à la raison. Nous nous proposons d’examiner différentes facettes du changement de croyances en abordant successivement le processus d’adhésion, l’apparente «résistance au ...

  8. Le Corbusier : una arquitectura para el hombre

    Directory of Open Access Journals (Sweden)

    Begoña Fernández Cabaleiro

    2000-01-01

    Full Text Available Le Corbusier conoció diferentes ciudades y pianteamientos arquitectónicos. A través de sus estudios y experiencias se planteó la arquitectura como una importante misión cultural. Pensó una nueva arquitectura que en la era de la máquina, prestase un nuevo servicio al hombre. Sería la búsqueda de la manifestación del pasado en una equivalencia para los tiempos modernos.Le Corbusier knew different cities and ways of architecture all around the world. Through his studies and works, he saw the important cultural mission of the architecture. Architects ought to make new works for the man in the machine time. They must look for the last magnificence according to the present needs.

  9. Le mythe de la femme sauvage

    OpenAIRE

    Pelen, Jean-Noël

    2008-01-01

    Le livre de Clarissa Pinkola Estés, Femmes qui courent avec les loups. Histoires et mythes de l’archétype de la femme sauvage (Paris, 1996, e. o. 1992), connaît, depuis sa parution, un véritable succès mondial. Son objet est de « faire recouvrer à la femme la beauté de ses formes psychiques naturelles ». Le chemin pour y parvenir est longuement décrit à partir d’une analyse jungienne de quatorze récits de tradition orale (contes, mythes, légendes) qui renfermeraient les secrets des « anciens ...

  10. Mel Gibson contre le boulevard Raspail

    Directory of Open Access Journals (Sweden)

    Boris Jeanne

    2007-03-01

    Full Text Available Que peuvent faire les historiens et les anthropologues spécialistes de l’Amérique face à la puissance médiatique et commerciale d’Apocalypto, le dernier film de Mel Gibson, produit par Buena Vista (c'est-à-dire Disney et ayant déjà engrangé plus de 50 millions de dollars de recette avant même sa sortie en France ? Le cinéma est un art du présent, et quelle que soit l’exactitude de la reconstitution historique qu’il prétend parfois présenter, il demeure un puissant vecteur d’analyse de la soc...

  11. Le changement de croyances extrêmes

    OpenAIRE

    Sauvayre, Romy

    2012-01-01

    Dans le domaine de l’adhésion et de la désadhésion à un mouvement marginal – appelé «secte» par les uns et «Nouveaux Mouvements Religieux» par les autres –, il semble mystérieux de voir un individu accepter des croyances et des pratiques perçues comme irrationnelles, alors que la désadhésion est vue comme un retour «normal» à la raison. Nous nous proposons d’examiner différentes facettes du changement de croyances en abordant successivement le processus d’adhésion, l’apparente «résistance au ...

  12. Aiutare le vittime della mafia a ribellarsi

    Directory of Open Access Journals (Sweden)

    Roberto Riccardi

    2007-09-01

    Full Text Available Nino Miceli is a Sicilian man, owner of a small business: at the beginning of 1990s he is concessionnaire of cars in Gela, an quite big town in Sicily. He works hard and soon he starts to earn a lot. Business is very good, and customers are satisfied and everything seems to go on successfully. But the mafia keeps an eye on him and, at a certain point, he was asked to pay them what in Italy is called “pizzo”. Nino Miceli does not want to pay it, he does not want to surrender to the mafia coercion. However, at the beginning he pays the “pizzo” but then he starts to record the conversation he has with those men (the “mafiosi”, in order to prove and demonstrate the crime. He also looks for protection at the local station of Carabinieri; finally, he decides to report the extortion but, from that time on, he starts to experience more and more serious threats.Helped by an officer of Carabinieri, he becomes a witness of justice and, for that reason, he must change his identity. He leaves Sicily along with his family and move into a different region of Italy, far from his town, where nobody knows him. In 2007 he decides to write a book of memories, titled “Io, il fu Nino Miceli” (in English it could sound like “I was Nino Miceli”. This article tells his story, speaking also about the role played by the Arma of Carabinieri in supporting victims of racket and usury.Nino Miceli est un entrepreneur sicilien originaire de Realmonte, une ville en province d'Agrigento. Au début des années 90, il est proprietaire du garage Lancia à Gela. Il s'engage beaucoup dans son travail et les résultats ne tardent pas à arriver. La clientèle augmente, les affaires vont bon train, mais c'est justement quand l'entreprise est en train de prospérer que la mafia lui demande des comptes. Il doit payer le pot-de-vin comme tous les commerçants du quartier. Nino Miceli n'est pas d'accord avec cela. Au début il subit, mais il commence bientôt

  13. Le Japon quatre fois frappé

    Directory of Open Access Journals (Sweden)

    Philippe Pelletier

    2011-03-01

    Full Text Available Illustration 1 – Hauteur du tsunami sur le littoral (en mètresSources : Brunet R. (dir, 1994. Géographie universelle. Belin/Reclus ;Pelletier Ph., Fournier C., 2008. Atlas du Japon. Autrement ; http://silatitudes.teledetection.fr/index.php :actualité/54-mapping-japan-earthquake-and-tsunami Dans un essai polémiste au destin retentissant, du moins auprès de ceux qui s’intéressent sérieusement à l’Asie orientale, le sinologue Jean François Billeter dénonçait l’approche néo-orientaliste du sino...

  14. Le Devenir d’un concept

    Directory of Open Access Journals (Sweden)

    Ioulia Podoroga

    2011-03-01

    Full Text Available Cet article examine l'usage métaphorique, chez Blanchot, du terme de résurrection, et sa transformation chez Jean-Luc Nancy en concept de théorie littéraire. Il s'agit alors de suivre les torsions opérées sur ce terme religieux, d'abord chez Blanchot qui en pervertit poétiquement le sens dans l'image d'une résurrection de la mort où la mort devient le sujet de la résurrection, puis chez Nancy qui, reprenant l'image et les paradoxes qu'elle porte, veut en faire non seulement un motif récurrent dans l'œuvre de Blanchot mais jusqu'au concept permettant de comprendre au plus profond ce qu'est pour ce dernier l'expérience littéraire

  15. LE SECTEUR INFORMEL EN ALGERIE : APPROCHES, ACTEURS ...

    African Journals Online (AJOL)

    ... du secteur. * Maître de conférences en sciences économiques, Université de Bejaia ..... nales et internationales et dans un souci d'harmoniser les statistiques sur le secteur informel dans les ...... Thèse de doctorat,. Université Paris Est Créteil et université de Bejaia, Paris-Alger. ... Institut de la Méditerranée. (France) et ...

  16. Le médecin, mon ami?

    OpenAIRE

    Rieder, Philip Alexander

    2014-01-01

    Cet article retrace l'histoire de la relation thérapeutique au cours de l'Ancien Régime en mettant en évidence l'importance de l'amitié entre le médecin et son malade. Une explication est proposée à la transition, au 19e siècle, vers une relation thérapeutique professionnelle.

  17. Le nouveall visage de la campagne chinoise

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    Dans IES vastes territoires de Chine se trouve Un hombre considérable de bourgs de tallies variables, ou vivent 80% de la population chinoise. Après plus de 20 ans de """"""""""""""""réforme et d'ouverture"""""""""""""""", émerge une situation économique route nouvelle; """"""""""""""""Le développement rural avec les technologies modernes"""""""""""""""". Les petits bourgs ont établit un système de soins médicaux,

  18. COMO ENTENDER AS PRINCIPAIS TEORIAS DA LE

    OpenAIRE

    Nascimento, Francisco de Assis do; Carvalho, Jander Ramos; Costa, Priscila Márcia de Andrade; Bastos, Rafael Lira Gomes

    2013-01-01

    O presente artigo mostrará algumas das principais teorias de aquisiçãode LE. Desta forma mostraremos como fatores como afetividadee o meio, encontrados nessas teorias podem influenciar no processode aquisição de uma língua estrangeira. Observaremos também quecada teoria observa pontos diferentes do processo de aquisição de L2,uns tendem ao cognitivismo outras ao social, e outras aos aspectos lingüísticos.

  19. LE SESSE DEL LAGO DI VICO

    Directory of Open Access Journals (Sweden)

    g. pannocchia

    1951-06-01

    Full Text Available Nel presente lavoro si determinano con i metodi di Defant e diHidaka i periodi delle sesse nni-bi e tri-nodale del lago di Vico, lerelative distanze dei nodi e le curve rappresentanti l'andamento delleampiezze di oscillazione con i metodi detti. Con il metodo indicatoda Neumann si determina di nuovo il periodo della sessa uni-nodale.

  20. Spotlight on CERN : Le code de conduite

    CERN Multimedia

    CERN Video Productions

    2010-01-01

    Cette année 2010, le démarrage du LHC a été le témoignage de la réussite de la collaboration scientifique au CERN, rapprochant les personnes, hommes et femmes, tous ensemble pour la plus grande des réalisations. Cette collaboration nécessite une ouverture sur la diversité basée sur des valeurs solides. Pour s’assurer que l'Organisation continue sur la voie du succès, un consensus a été atteint sur des valeurs caractérisant le CERN et celles-ci ont été regroupées dans un Code de conduite, décrivant la norme de base du comportement que nous pouvons tous espérer de nous-mêmes et de nos collègues sur notre lieu de travail. Entrevues avec Rolf Heuer, Directeur Général du CERN, Anne-Sylvie Catherin, Chef du Département des Ressources Humaines, et Vincent Vuillemin, Ombuds au CERN.

  1. L'astronomie dans le monde

    Science.gov (United States)

    Manfroid, J.

    2003-01-01

    Premier plongeon d'Integral dans l'univers du rayonnement gamma; Collisions et cannibalisme galactique; Proplydes dans la Carène; Quasar record; Eta Carinae étoile double; Géantes rouges; La vitesse de la gravité; Sursaut gamma; Une planète lointaine; Un Troyen neptunien; L'univers lointain; Bébé galaxie; Le centre de notre Galaxie version X; Un HERO astronomique; Disque X géant; Electrons mystérieux dans RCW 38; Environnement martien; Interférométrie infrarouge; Méthane titanien; Micro-organismes atmosphériques; Réchauffement planétaire; La meilleure observation infrarouge de l'univers; Planètes en grand nombre?; Pôle sud et Big Bang; SS 433; Volcans et astéroïdes; Amalthée; De l'eau sur Mars; DEM L 106; Gliese 876; La taille des étoiles; Le danger des supernovas; Vieux cailloux

  2. Le Service Accueil et Contrôle d'Accès

    CERN Document Server

    Ducastel, C

    1999-01-01

    L'utilisateur qui vient au CERN pour la première fois, est accueilli généralement par les membres du service 'Accueil et Contrôle d'Accès'. Cet utilisateur sera tout d'abord orienté vers un des postes d'hôtesses d'accueil en charge de l'enregistrement et de la délivrance de cartes CERN. Les informations seront saisies et immédiatement disponibles et transmises, via le système AMS, aux équipements de contrôle d'accès et à la Centrale de Surveillance des accès, chargée de la supervision de tout le dispositif de contrôle d'accès au domaine. Ces contrôles aux entrées et accueil des visiteurs individuels sont complétés par des missions de surveillance à l'intérieur du Domaine pour les agents, et par des travaux de gestions de dossiers administratifs (service enregistrement) pour les hôtesses. Un contrat commun assure une uniformité de formation des agents et hôtesses. Ce contrat est assorti d'une clause de Bonus Malus afin de tendre vers une optimisation des performances.

  3. Le royaume de Méroé

    Directory of Open Access Journals (Sweden)

    Claude Rilly

    2010-04-01

    Full Text Available La civilisation napato-méroïtique qui domine le cours du Nil moyen, d’Assouan à Khartoum, depuis le viiie siècle av. J.-C. jusqu’au ive siècle apr. J.-C., fait suite à la colonisation égyptienne du Soudan ancien. Par sa religion, son idéologie, ses institutions, sa culture matérielle, elle se rattache étroitement au modèle égyptien à tel point que l’on peut parler d’une « civilisation pharaonique » dont l’Égypte et le Soudan ancien seraient les deux versants. L’histoire du royaume de Méroé est assez mal connue dans le détail, d’une part parce que les textes méroïtiques sont peu nombreux et très partiellement compris, d’autre part en raison d’une couverture archéologique relativement récente et clairsemée. Les sources extérieures, égyptiennes, grecques et romaines, sont assez laconiques et moyennement fiables. Les progrès récents de l’archéologie et de la philologie du Soudan ancien laissent toutefois espérer de prochaines avancées.The Napatan-Meroitic civilisation flourished in the Middle Nile valley from the 8th century BC to the 4th century AD. It inherited from the former Egyptian colonisation cultural patterns that are obvious in religious and ideological fields as much as in institutions or artefacts. One could even speak of a “Pharaonic civilization” with two sides, Egypt and Ancient Sudan. Little is known from the history of the kingdom of Meroe, first because Meroitic texts are in small number and poorly understood and secondly because archaeological excavations are fairly recent and scattered. External sources such as Egyptian, Greek and Roman evidences are scanty and moderately reliable. However recent progress in the archaeology and philology of Ancient Sudan is currently improving the knowledge of this civilisation.

  4. Le temps passe,la lecture reste%Le temps passe, la lecture reste

    Institute of Scientific and Technical Information of China (English)

    张晓霖

    2011-01-01

    Il y a plus de deux mille ans,Confucius insistait déjà sur l'importance de la lecture.En effet,depuis deux mille ans,la lecture est une tradition,qui influence beaucoup les Chinois.De m(e)me,en Occident,l'Eglise chrétienne a demandé très t(o)t à ses fidèles de lire la Bible,car sa lecture était le moyen d'entrer en communication avec Dieu.Selon la tradition juda(i)que,la mère mettait un peu de miel sur la Bible,et laissait ses enfants l'embrasser,ceci dans le but de leur faire comprendre que le Livre est d'une douceur merveilleuse.

  5. P. Maraval, Théodose le Grand, Le pouvoir et la foi

    OpenAIRE

    Vinel, Françoise

    2015-01-01

    Le titre de la nouvelle publication de P. Maraval annonce une monographie, et la succession des chapitres correspond à la chronologie de la vie de Théodose, de la bataille d’Andrinople en 378 et son accession au trône impérial jusqu’à sa mort en 395. Une telle étude comble un manque dans l’édition française, rappelle l’A. en mentionnant le livre d’E. Fléchier, Histoire de Théodose le Grand, paru en 1679 ; mais la bibliographie mentionne deux études allemandes récentes, celle de J. Leppin paru...

  6. le des tendeurs sur le comportement dynamique d’une transmission par courroie

    OpenAIRE

    Michon, Guilhem; Manin, Lionel; Rémond, Didier; Dufour, Regis

    2006-01-01

    Les transmissions par courroie poly-v (striées), utilisées notamment pour l’entraînement des accessoires d’un moteur automobile, sont généralement équipées d’un galet tendeur afin de réduire les vibrations et de garantir une tension minimum suffisante. Deux types de tendeurs peuvent être utilisés, ils diffèrent par la façon dont est généré l’amortissement : le premier, dit ‘mécanique’ utilise le frottement sec ; le second, dit ‘hydraulique’ est équipé d’un amortisseur. Les deux sont équipés d...

  7. Le bois et ses usages dans le De architectura de Vitruve

    Directory of Open Access Journals (Sweden)

    Sylvie Rougier-Blanc

    2011-05-01

    Full Text Available Ni traité d’architecture à proprement parler, ni véritable ouvrage philosophique, le De architectura de Vitruve permet d’aborder la question du matériau bois et de ses usages en architecture de manière à la fois précise et décevante pour l’historien des techniques : précise parce que le paragraphe 9 du livre II est plus particulièrement consacré à cette materia, mais décevante parce que le contenu ne répond pas aux attentes et ne permet pas de dresser un bilan des choix des essences en foncti...

  8. Le monde Gothique de Le Fanu : cryptonymes et mots étrangers

    OpenAIRE

    Berthin, Christine

    2014-01-01

    Cet article examine l’usage des mots et des noms étrangers chez Le Fanu. Dans Uncle Silas le français est la langue de la terreur personnelle, collective et historique. Il est la langue de tous les scélérats dans le texte et ressurgit d’un passé mal refoulé, mal enterré. Dans Carmilla, l’allemand vient offrir une alternative à la langue du récit. Cette autre langue est la langue de l’autre, du revenant, du vampire qui parle à contretemps et à contre-courant de la doxa et dont les mots demeure...

  9. De quoi le genre est-il le nom ?

    OpenAIRE

    Andrieu, Bernard

    2013-01-01

    Cette note de lecture présente une courte évolution des travaux sur le genre sous l’angle du rapport au corps en démontrant comment la dénaturalisation du corps et du sexe biologique a conduit à une description culturaliste des fonctions individuelles et des rôles sociaux. Si le genre dénaturalise le corps c’est en refusant toute référence au sexe ou à la sexualité en tant qu’ils seraient des données naturelles. Depuis son apparition en 1947, sous la plume de John Money, psychologue chargé du...

  10. Lele de l'imagination chez Kant

    OpenAIRE

    Azoulay, Arnaud

    2015-01-01

    Ce travail se propose d'analyser lele fondamental que joue l'imagination relativement à la possibilité de la connaissance, en examinant la fonction propre des deux actes cognitifs essentiels de l'imagination transcendantale, à savoir, la synthèse et le schématisme. La réflexion sur cette faculté originaire et médiatrice de l'esprit irrigue l'ensemble de l’oeuvre critique kantienne, et nous fait découvrir une faculté aussi mystérieuse qu'indispensable, dont les mécanismes insaisissables s'a...

  11. Le théâtre de la politique

    Directory of Open Access Journals (Sweden)

    Michel Contat

    2007-06-01

    Full Text Available Chacun aujourd’hui choisit son Sartre, comme on choisissait son Marx dans les lointaines années 1960, celui des Grundrisse, celui des manuscrits de 1848 ou celui du Capital. Une citation : 'De toute façon, l’ordre social repose aujourd’hui sur la mystification des consciences, comme aussi le désordre. Le nazisme était une mystification et le gaullisme en est une autre, le catholicisme en est une troisième ; il est hors de doute, à présent, que le communisme français en est une quatrième.' C’est Sartre qui parle, le Sartre 1947, celui de Qu’est‐ce que la littérature ? – le Sartre que l’on a peut‐être aujourd’hui le plus de satisfaction à suivre. (Situations II, p. 306. Cité par Julia Kristeva. Le centenaire de 2005 a révélé que Sartre reste toujours l’objet vivant d’une polémique, que ce nom recouvre un homme et une pensée à attaquer, parce que, finalement, comme il le disait, « l’intelligence offense ».

  12. Le discours des Comices : un discours modèle

    Directory of Open Access Journals (Sweden)

    Anne Herschberg Pierrot

    2009-10-01

    Full Text Available Dans un discours officiel, publié par le Journal de Rouen du 22 juillet 1853, Flaubert trouve une phrase du discours des Comices qu’il avait écrite la veille. Cet article présente et reproduit les discours cités par le Journal de Rouen.In an official speech, published in the Journal de Rouen on July 22nd 1853, Flaubert found a sentence from the Agricultural association (« Comices agricoles » speeches that he had actually written himself the previous evening. This article presents and reprints the speeches quoted by the Journal de Rouen.

  13. Le discours fantastique est-il rationnel ?

    Directory of Open Access Journals (Sweden)

    Anouck Linck

    2011-01-01

    Full Text Available L’importance de la contradiction dans la composition du discours fantastique a été signalée par la critique et le carré sémiotique de Greimas assigne au fantastique une place de choix – non reconnue encore à ce jour. Lele structurant de la contradiction est confirmé par notre méthode d’investigation, qui envisage l’acte de lecture sur le mode de l’élaboration d’un acte démonstratif. Cette méthode, appliquée à trois textes emblématiques du discours fantastique, aboutit en effet à l’élaboration de théories inconsistantes (contenant une contradiction du type p  p mais non triviales, au sein desquelles le principe aristotélicien de non-contradiction n’est pas valable. Nous touchons là aux limites de la raison classique, d’où notre questionnement : le discours fantastique est-il rationnel ? Plutôt que de répondre par la négative, nous montrons que la non-absurdité du discours fantastique invite au dépassement des limites de la raison classique et à une extension de cette dernière, car il se place sous l’égide d’une logique formelle moins contraignante et plus générale que la logique classique : la logique paraconsistante de Newton da Costa.La crítica ha señalado la importancia de la contradicción en lo que se refiere a la composición de la narrativa fantástica y ésta tiene su lugar asignado dentro del cuadrado semiótico de Greimas – un lugar hasta ahora no identificado como tal. Al considerar el acto de lectura como elaboración un acto demostrativo, nuestro método de investigación resalta ese papel fundamental de la contradicción. Dicho método, aplicado a tres textos emblemáticos de la narrativa fantástica, desemboca en efecto en la elaboración de teorías inconsistentes (que contienen una contradicción de tipo p  p pero no triviales, dentro de las cuales el principio aristotélico de no-contradicción no es válido. Con esto llegamos al límite de la racionalidad

  14. Le texte prophétique

    Directory of Open Access Journals (Sweden)

    Jacques Halbronn

    2000-05-01

    Full Text Available Littérature et prophétie entretiennent un lien complexe : il s’agit de deux sphères différentes, antagonistes même, ne répondant pas aux mêmes enjeux et ne regardant pas dans la même direction. En revanche l’interface entre prophétisme et actualité politique est beaucoup plus nette : le prophète interpelle son contemporain, cherche à peser sur les événements. Pour être bien comprise la littérature prophétique doit donc être replacée dans le contexte politico-religieux qui l’a vu naître, sans quoi elle risque de n’être prise que pour un délire sans fondement. Les ambiguïtés sémantiques et les incohérences apparentes du texte prophétique s’éclairent ainsi d’un jour nouveau lorsqu’on les envisage à l’aune de certaines réalités contextuelles, mais aussi lorsque l’on parvient à les resituer par rapport à tout un corpus de textes plus ou moins aisément identifiable qui leur a servi de source première et féconde. Le texte prophétique doit être envisagé en réseau, comme une variation au sein d’un vaste continuum textuel et langagier.

  15. Quel contrôle de gestion pour les startups ?

    OpenAIRE

    Meyssonnier, François

    2015-01-01

    Une étude de huit PME fondées sur la science permet d’identifier les spécificités du contrôle de gestion des startups. Dans les startups émergentes le dirigeant n’utilise que des linéaments de contrôle de gestion essentiellement pour développer son approche cognitive du business model. Dans les startups en croissance le contrôle de gestion a un rôle de garde-fou et les outils de pilotage de la performance sont utilisés essentiellement de façon interactive et pour la prévision. Les principaux ...

  16. Reformulation à l’oral et dans le forum Web

    Directory of Open Access Journals (Sweden)

    Eshkol-Taravella Iris

    2016-01-01

    Full Text Available Le cadre du travail réalisé entre dans le domaine de la linguistique de corpus et du Traitement Automatique des Langues (TAL. Les recherches sont fondées sur trois corpus : deux corpus oraux (ESLO1 et ESLO2 et un corpus composé de discussions collectées sur un forum de Doctissimo. Le travail vise à détecter, analyser et comparer la reformulation introduite par trois marqueurs (c’est-à-dire, je veux dire et disons dans le discours oral et le corpus écrit dialogique du Web. L’objectif est d’étudier la raison pour laquelle le locuteur décide de modifier un segment par un autre et de repérer un lien formel entre les deux segments reformulés aux différents niveaux linguistiques (morphologique, lexical, syntaxique, etc..

  17. Compton profile of tantalum

    Indian Academy of Sciences (India)

    Thomas Varghese; K M Balakrishna; K Siddappa

    2003-03-01

    The Compton profile of tantalum (Ta) has been measured using IGP type coaxial photon detector. The target atoms were excited by means of 59.54 keV -rays from Am-241. The measurements were carried out on a high purity thin elemental foil. The data were recoreded in a 4 K multichannel analyzer. These data duly corrected for various effects are presented and compared with theoretical and measured values. Best agreement with experiment is found for the 5d36s2 electron configuration.

  18. Le vespe qualunquiste e la satira politica

    Directory of Open Access Journals (Sweden)

    Maurizio Cocco

    2012-10-01

    Full Text Available The weekly review «L’Uomo Qualunque» was the most popular newspaper in Italy in the second postwar. Created by a Neapolitan playwright, Guglielmo Giannini, it was the voice of the discontent of the middle classes and strongly opposed the CLN governments and the antifascist political parties.The paper aims to provide analysis of the use of satire in the newspaper. It focuses on the section named «Le vespe», in which Giannini used jokes and humorous anecdotes to criticize the transition from fascism to democracy; in particular the epuration, the political system and its personnel.

  19. Le zapping, les ethnologues, et leurs Indiens

    Directory of Open Access Journals (Sweden)

    Frédérique Langue

    2005-06-01

    Full Text Available Comme toujours s'agissant des expositions mises en scène au Grand Palais, la présentation est parfaite, impeccable. La mise en valeur des objets venus aussi bien de musées brésiliens qu'européens, et les commentaires qui les accompagnent, orientent le visiteur dans un labyrinthe "exotique" de poteries et d'objets de plume, coupé de temps à autre de documentaires portant sur les rituels amérindiens, chants psalmodiques à l'appui. L'auditoire y semble comme vissé sur place, davantage d'ailleur...

  20. Le ripetute migrazioni giapponesi in America Latina

    OpenAIRE

    Merler, Alberto; Niihara, Michinobu

    2011-01-01

    Gli autori, un italiano e un giapponese, presentano una sintesi delle considerazioni di partenza e delle ipotesi da cui prendono le mosse alcune ricerche sulle ripetute migra-zioni dei nipponici e dei loro discendenti tra Giappone e America Latina. Si evidenzia l’esistenza di una triangolazione di risorse ed esperienze che comprende pure l’Europa e, in particolare, l’Italia. Los autores, un italiano y un japonés, presentan un resumen de las primeras consideraciones y de las hipótesis que l...

  1. Le Chatelier's principle with multiple relaxation channels

    Science.gov (United States)

    Gilmore, R.; Levine, R. D.

    1986-05-01

    Le Chatelier's principle is discussed within the constrained variational approach to thermodynamics. The formulation is general enough to encompass systems not in thermal (or chemical) equilibrium. Particular attention is given to systems with multiple constraints which can be relaxed. The moderation of the initial perturbation increases as additional constraints are removed. This result is studied in particular when the (coupled) relaxation channels have widely different time scales. A series of inequalities is derived which describes the successive moderation as each successive relaxation channel opens up. These inequalities are interpreted within the metric-geometry representation of thermodynamics.

  2. Books reconsidered: Emile Durkheim, Le Suicide.

    Science.gov (United States)

    Robertson, Michael

    2006-12-01

    To reappraise Emile Durkheim's taxonomy of suicide in Le Suicide in the light of recent experience. While Durkheim's scientific method and argument are fundamentally flawed, some of his concepts have instrumental value in attempting to understand the complex origins of suicidal behaviour. Durkheim's baseless dismissal of mental illness as a key determinant of suicidal behaviour weakens his thesis significantly. However, his conceptualization of anomic, egoistic and altruistic suicide provides a means of comprehending recent trends in suicidal behaviour in the former Soviet states and a possible window into the psyche of the suicides of religious and political extremists.

  3. Images du Mage, images pour le Mage

    Directory of Open Access Journals (Sweden)

    Daniel GREGORIO

    2007-01-01

    Full Text Available Les œuvres d’Alphonse X proposent diverses représentations du mage, qui en font, tour à tour, l’ennemi ou l’allié de la religion chrétienne. Il est vrai que parfois, comme le montre l’histoire de Simon le magicien, la pratique de la magie implique un commerce direct et néfaste avec les forces infernales. Néanmoins, les personnages de Merlin et des Rois Mages, tels qu’ils sont présentés par Alphonse X, démontrent que magie et religion peuvent cohabiter, à condition toutefois que le mage croit en la virginité de Marie et en l’Incarnation et que sa pratique magique soit bénéfique pour la communauté. Ce bénéfice requiert parfois la reconstruction de l’univers quotidien ; pour ce faire, le magicien doit savoir quand et comment utiliser des objets et des pentacles, qui lui permettront de soumettre les forces surnaturelles. Il doit donc posséder une connaissance approfondie du monde naturel et des esprits qui, conjuguée à sa foi religieuse, l’empêchera de tomber dans la démonolâtrie.Las obras alfonsíes proponen diversas aproximaciones al personaje del mago, generalmente considerado como un ser antagónico del hombre religioso. Es cierto que en algunas ocasiones, como ocurre con Simón el mago, la práctica de las artes mágicas significa un trato directo y nefasto con las fuerzas infernales. Sin embargo, personajes como Merlín o los Reyes Magos, tal y como los describe Alfonso X, subrayan una posible cohabitación entre magia y religión sin que la práctica de la una signifique la exclusión de la otra. Sólo hay que cumplir con dos condiciones : creer en la virginidad de María y que Dios se hizo hombre, y proporcionar a la comunidad un beneficio claro. Este beneficio requiere en ocasiones remodelar lo cotidiano, utilizando objetos y pentáculos, en circunstancias extremadamente determinadas, lo que implica un conocimiento exhaustivo tanto del mundo natural como del simbólico y de los espíritus. Es este

  4. Le Verrier magnificent and detestable astronomer

    CERN Document Server

    Lequeux, James

    2013-01-01

    Le Verrier was a superb scientist. His discovery of Neptune in 1846 made him the most famous astronomer of his time. He produced a complete theory of the motions of the planets which served as a basis for planetary ephemeris for a full century. Doing this, he discovered an anomaly in the motion of Mercury which later became the first proof of General Relativity. He also founded European meteorology. However his arrogance and bad temper created many enemies, and he was even fired from his position of Director of the Paris Observatory.

  5. Le soluzioni Building Information Modeling di Bentley

    Directory of Open Access Journals (Sweden)

    Fulvio Bernardini

    2007-04-01

    Full Text Available La questione dell’interoperabilità dei dati negli ultimi anni è stata continuamente dibattuta dai professionisti dei vari settori. L’edilizia col suo ciclo di vita non hanno fatto eccezione e da quando il concetto di Building Information Modeling (BIM ha fatto il suo ingresso nel mondo dell’architettura, dell’ingegneria e delle costruzioni (AEC, le fasi inerenti il processo del buildingnon sono più state considerate separatamente. Bentley Systems, da sempre attiva nel settore delle infrastrutture, propone un’ampia gamma di soluzioni studiate proprio per coprire questo bisogno.

  6. L'astronomie dans le monde

    Science.gov (United States)

    Manfroid, J.

    2014-04-01

    Cartographie d’une naine brune; 2006DP14; Anatomie d’un astéroïde; L’astéroïde P/2013 R3; Formation des planètes; Planètes Kepler; Bêta Pictoris; Cratère Mojave; Les astéroïdes de la ceinture principale; Planète X; Mercure et la gravitation; Gloire sur Vénus; Galaxies elliptiques massives; Cas A; SN 2014J et les supernovae Ia; Le Grand Nuage de Magellan; Nébuleuse d’Andromède; ESO 137-001

  7. Il corpo, lo sport, le immagini

    Directory of Open Access Journals (Sweden)

    Nicola Porro

    2009-07-01

    Full Text Available E’ stato per primo Norbert Elias, nella sua critica al riduzionismo sociologico, a lamentare la difficoltà delle scienze sociali a misurarsi con le problematiche dello sport, così come delle emozioni, della sessualità, del gioco e della guerra. Attività umane che convergono in quell’autentico luogo sociale che è il corpo. Nel caso che ci interessa, si tratta di connettere il corpo, nella sua dimensione biologica, psichica e sociale, con quell’aspetto cruciale della civilizzazione che Elias definisce sportivizzazione.

  8. L'astronomie dans le monde

    OpenAIRE

    Manfroid, Jean

    2007-01-01

    Anions interstellaires; S Orionis; Altaïr; Courants stellaires; Etoiles jeunes; 2MASSW J1207334-393254; Alpha Andromède; Etoiles à neutrons (1); LH54-425; AGNs invisibles; Deux supernovae; Les GRBs selon Swift; Peser les trous noirs; Formation de trous noirs; Trou noir; ondes gravitationnelles : Virgo entre dans sa phase d'exploitation scientifique; Amas de galaxies actifs; Amas de galaxies; Galaxies actives d'amas; L'univers statique: le retour; Macho; Exoplanètes; Exop...

  9. Les Biotechnologies Marines dans le Grand Ouest

    OpenAIRE

    Boyen, Catherine; Jaouen, Pascal

    2015-01-01

    Travaux d'un groupe de réflexion au sein de l'Europole Mer sur le thème des biotechnologies marines.; Marine (= blue) biotechnology, i.e. the utilization of marine bio-resources as a target or source of biotechnologicalapplications, is a field with massive potential for innovation and economic growth. In a context of rapid climate change and increasing pressure on natural resources, renewed interest in marine biotechnology has been promoted by application of recent methodological and technolo...

  10. Kierkegaard - le Philosophe, le Juge et le Droit (Kierkegaard – the Philosopher, the Judge and the Law

    Directory of Open Access Journals (Sweden)

    Ditlev Tamm

    2014-12-01

    Full Text Available Le fameux théologien et philosophe Søren Kierkegaard (1813-1855 dans son oeuvre souvnt utilize expressions et metaphors pris du monde judiciare. Il pare, quíl est bien au courant quant´au monde des jurists de son age et place. La plupart des expressions sont pris du droit penal et de la procédure pénale. Le criminel comme individu ou l’objet de línterrogation et comme coupable es tun des ses images favorites. Dans ses oeuvres Ou-bien … Ou bien et Etapes su la chemin de la vie nous encontrons un juge danois avec la possibilité de suivre ses reflections sur son travail et l’éthique d’un repésentant de la justice locale. Le juge est une des masques sous lesquelles Kierkegaard s’adresse a nous. Les oeuvres de Kierkegaard et l’utilisation des expressions prises du monde du droit sont ici présentées dans un contexte contemporaire du doit et vie á Copenhague dans les années entre 1840 et 1855 en contrastant les différances entre le narrative de Kierkegaard selon lequel le doit peut server comme example et sur l’autre côté son concept transcendental de l’être coupable. The famous Danish theologian and existentialist philosopher Søren Kierkegaard (1813-1855 in his work often used expressions or metaphors taken from judicial life, which reveals him as familiar with the legal world of his time and place. Most expressions are taken from penal law and penal procedure. The criminal as individual or the object of interrogation and guilt is one of his favorite images. In his Enten-Eller (Either/or and Stadier paa Livets Vej (Stages on Life’s Way we even meet a Danish judge and follow his reflections on his work and the ethics of a representative of local Justice. The judge is one of the masks under which Kierkegaard presents his thinking. Kierkegaard’s works and his use of expressions taken from the legal world are presented in the contemporary context of law and life in Copenhagen in the 1840ies however contrasting the

  11. Kierkegaard - le Philosophe, le Juge et le Droit (Kierkegaard – the Philosopher, the Judge and the Law

    Directory of Open Access Journals (Sweden)

    Ditlev Tamm

    2014-12-01

    Full Text Available Le fameux théologien et philosophe Søren Kierkegaard (1813-1855 dans son oeuvre souvnt utilize expressions et metaphors pris du monde judiciare. Il pare, quíl est bien au courant quant´au monde des jurists de son age et place. La plupart des expressions sont pris du droit penal et de la procédure pénale. Le criminel comme individu ou l’objet de línterrogation et comme coupable es tun des ses images favorites. Dans ses oeuvres Ou-bien … Ou bien et Etapes su la chemin de la vie nous encontrons un juge danois avec la possibilité de suivre ses reflections sur son travail et l’éthique d’un repésentant de la justice locale. Le juge est une des masques sous lesquelles Kierkegaard s’adresse a nous. Les oeuvres de Kierkegaard et l’utilisation des expressions prises du monde du droit sont ici présentées dans un contexte contemporaire du doit et vie á Copenhague dans les années entre 1840 et 1855 en contrastant les différances entre le narrative de Kierkegaard selon lequel le doit peut server comme example et sur l’autre côté son concept transcendental de l’être coupable. The famous Danish theologian and existentialist philosopher Søren Kierkegaard (1813-1855 in his work often used expressions or metaphors taken from judicial life, which reveals him as familiar with the legal world of his time and place. Most expressions are taken from penal law and penal procedure. The criminal as individual or the object of interrogation and guilt is one of his favorite images. In his Enten-Eller (Either/or and Stadier paa Livets Vej (Stages on Life’s Way we even meet a Danish judge and follow his reflections on his work and the ethics of a representative of local Justice. The judge is one of the masks under which Kierkegaard presents his thinking. Kierkegaard’s works and his use of expressions taken from the legal world are presented in the contemporary context of law and life in Copenhagen in the 1840ies however contrasting the

  12. New Scientist: le 50 idee che cambieranno la scienza...

    Directory of Open Access Journals (Sweden)

    Redazione

    2012-07-01

    Full Text Available Quali sono le "idee" destinate a cambiare radicalmente la conoscenza che abbiamo del mondo e le relazioni che intratteniamo con esso? Con l'aiuto di esperti di diverse discipline il New Scientist ha raccolto le 50 che sembrano meglio candidarsi a questa sfida. Dalle scienze della vita all'intelligenza artificiale, dalla genetica alle nanotecnologie, dalla cosmologia alla ricerca sul cervello, dall'ingegneria alla vita artificiale...

  13. Barbara Carnevali, Le apparenze sociali. Una filosofia del prestigio

    Directory of Open Access Journals (Sweden)

    Corrado Confalonieri

    2015-11-01

    Full Text Available Non sempre la prima frase di un libro è rappresentativa del suo intero contenuto; non sempre la prima nota a piè di pagina lascia emergere con chiarezza le origini della ricerca, le sue ragioni. Entrambe le cose, invece, accadono nel presente volume di Barbara Carnevali, e un buon modo di ricostruirne l’insieme può essere quello di combinare gli elementi che vengono messi a disposizione del lettore da questi due passaggi testuali d’apertura.

  14. La prolusione di rocco e le dottrine del processo penale

    OpenAIRE

    Orlandi, Renzo

    2015-01-01

    L’articolo analizza le conseguenze del pensiero giuridico di Arturo Rocco, dal 1910 nella dottrina di procedura penale, ossia, il metodo tecnico-giuridico (esegesi, sistematica e critica). La dogmatica di procedura pena- le inizia con la monografia di Giovanni Conso, nel 1955. L’insoddisfazione con il tecnicismo giuridico e con la mancanza di maturità scientifica si è manifestata con Carnelutti nel 1946 (Cerenterola), sottolineando le peculiarità strutturali del procedimento penale. In questa...

  15. Note sur le bassin Houiller de Sabero, Espagne

    NARCIS (Netherlands)

    Henkes, H.

    1961-01-01

    En Espagne septentrionale, dans la province de León, à une dizaine de kilomètres au NO de la ville de Cistierna, s’étend un bassin houiller entre le Rio Porma et le Rio Esla, perpendiculaire à ces fleuves et avec la ville de Sabero au centre. La situation précise peut être retrouvée sur les feuilles

  16. Transforming Exploratory Creativity with DeLeNoX

    DEFF Research Database (Denmark)

    Liapis, Antonios; Martínez, Héctor Pérez; Togelius, Julian

    2013-01-01

    We introduce DeLeNoX (Deep Learning Novelty Explorer), a system that autonomously creates artifacts in constrained spaces according to its own evolving interestingness criterion. DeLeNoX proceeds in alternating phases of exploration and transformation. In the exploration phases, a version...... in games. We also situate DeLeNoX in relation to the distinction between exploratory and transformational creativity, and in relation to Schmidhuber’s theory of creativity through the drive for compression progress...

  17. Le statue di Dedalo: le riviste di filosofia politica italiane di serie A

    Directory of Open Access Journals (Sweden)

    Maria Chiara Pievatolo

    2013-03-01

    Full Text Available Roars ha puntualmente segnalato l’ancipite vicenda delle nuove liste di riviste last minute per l’abilitazione scientifica nazionale. E’ cambiato qualcosa fra le riviste di filosofia politica italiane di serie A, di cui avevamo già avuto modo di discutere?

  18. La culture matérielle enfantine entre le cute et le cool

    Directory of Open Access Journals (Sweden)

    Gilles Brougère

    2012-11-01

    Full Text Available Cet article explore la façon dont on adresse un objet à l’enfant, c’est-à-dire la rhétorique à l’œuvre pour séduire les enfants (et les parents dans certains cas. Si l’éducation peut être présente pour certains produits, domine très largement aujourd’hui une rhétorique du fun, une association de l’objet à l’enfance via le divertissement et l’insertion dans une culture des pairs. Pour partie cet adressage se fait à travers l’utilisation de personnages ou d’univers sous licence qui proposent une rhétorique du fun prête à l’emploi. Mais l’analyse des univers disponibles montre que l’on peut décomposer le fun à travers deux pôles opposés, le cute, dont Hello Kitty constitue un exemple archétypal, et le cool, que Titeuf permet de saisir dans sa logique. A travers la distinction du cute et du cool, il s’agit de contribuer à l’analyse du déploiement contemporain d’une culture du divertissement qui est incorporée aux objets de l’enfance, tout en étant un moyen de capter l’intérêt de ceux-ci.

  19. 'Prendre le BIC': Le combat spirituel Congolais et les transformations sociales

    NARCIS (Netherlands)

    J. Ndaya Tshiteku (Julie)

    2008-01-01

    textabstractLa mondialisation c’est l’intensification des contacts entre les cultures et les formations sociales des différents continents. Elle a été favorisée par le développement rapide des moyens de transport et des technologies de communication sophistiquées, facilitant la diffusion des

  20. [FR] Le developpment du Travail Social et le pluralisme au Québec

    Directory of Open Access Journals (Sweden)

    André Jacob

    2011-06-01

    Full Text Available Normal 0 21 false false false ES X-NONE X-NONE MicrosoftInternetExplorer4 Au Canada et au Québec, traiter des questions liées à la diversité culturelle et au racisme a été un défi pour les gouvernements depuis les années soixante. Auparavant et jusqu'à présent, une grande partie des responsabilités en termes de développement ethnoculturel sensible des services publics (services sociaux, des programmes de formation en travail social, etc. ont été laissés aux mains d’organismes de charité non-lucratifs. Cependant, peu à peu, depuis les années soixante, le gouvernement fédéral et le gouvernement provincial, ont dû développer des politiques et des programmes d'action. Au Québec, le travail social a fait partie du débat face à deux grands courants politiques, l’un canadien basé sur le multiculturalisme, et l’autre québécois basé sur l'interculturalisme. L'article vise à donner une perspective historique

  1. Jakuta Alikavazovic, La blonde et le bunker derrière le miroir…

    Directory of Open Access Journals (Sweden)

    Marjorie Broussin

    2013-11-01

    Full Text Available Le roman que nous propose la romancière française, née en 1979, après le prix Goncourt du premier roman avec Les corps Volatils, a remporté la mention spéciale du jury Wepler. Et l’œuvre perturbe en effet tous nos repères, réalisant les aspirations de son auteure : « L’originalité dans la répétition. Le déjà-vu comme condition du sens, et paradoxalement comme irruption de la nouveauté. » Impossible de se raccrocher longtemps au désir d’élucidation, moteur du roman noir, tant la narration joue du speculum, à la fois jeux de regards et de miroirs, et spéculations de toutes sortes. Et pourtant, Jakuta Alikavazovic a éveillé notre curiosité et notre instinct de détective. C’est pourquoi nous vous proposons de nous suivre dans cette enquête, sur les traces du récit, avec pour seul indice celui qu’a laissé l’auteure derrière elle : « L’un des thèmes de La blonde et le bunker (comme de tous mes livres est la disparition »

  2. Le genre comme rapport d’inégalité sociale dans le discours publicitaire

    Directory of Open Access Journals (Sweden)

    Jean-Claude Soulages

    2016-12-01

    Full Text Available Loin de se réduire à une simple transaction commerciale, une annonce publicitaire est un espace de croyances sur des identités, des rôles et des pratiques sociales. Au même titre que d’autres productions fictionnelles de la culture de masse, elle représente l’une des faces de ce miroir social alimenté par la circulation incessante d’attitudes et de croyances, affichant même s’il s’agit bien souvent pour cette dernière d’un positionnement ludique, un second monde peuplé par nos avatars. La publicité tout comme le fait la fiction télévisée définit l’horizon des possibles d’une communauté donnée. Ce qu’elles réalisent toutes deux c’est l’entrée de l’imaginaire dans le réel. Même si, à partir des années 70, s’opère un lent défigement des stéréotypes sexistes, le publicitaire ne se fera aucunement le porte-parole explicite d’une quelconque lutte féministe, il optera toujours pour une tactique ambivalente de double speak: des effets de décadrage mettant en exergue des situations délibérément décalées ou burlesques (Un homme qui change les couches de bébé! Un clown qui fait la lessive!, mais cristallisant des inégalités de rôles. En jouant tout à la fois sur le défigement et la réactivation des stéréotypes, c’est bien un rôle de passeur et de go between, qu’est assigné le publicitaire en se faisant l’arbitre ventriloque de ces conflits de légitimité et de construction identitaire qui agitent notre modernité.

  3. Analyser le style du dialogue. Quelques remarques sur le dialogue au XIXe siècle

    Directory of Open Access Journals (Sweden)

    Naïm Jérémy

    2014-07-01

    Full Text Available Cet article dresse un état des lieux de l'analyse du dialogue de roman depuis trente ans. Il fait remarquer les difficultés rencontrées par les linguistes à dégager une spécificité du dialogue, empruntant là, et sans le dire, les outils de la narratologie, ici, mais avec précaution, ceux de l'analyse conversationnelle ou des discours rapportés. L'évolution des études sur le dialogue montre tout de même une attention grandissante pour son intégration dans la narration et l'interrogation renouvelée de sa référence extra-textuelle. L'auteur s'est donc proposé de prendre cinq extraits de dialogue du XIXe siècle et de les comparer, à partir de ces deux seuls critères. Il fait remarquer qu'au début du siècle, le dialogue est conçu comme un bloc de texte, autonome, isolé de la masse narrative. Les liens entre la rhétorique et le dialogue contribuent à renforcer cet isolement, en faisant du dialogue un morceau d'éloquence. Le réalisme s'attaque à cette représentation, en accentuant les liens du dialogue et de la narration et en proposant des dialogues qui ne se contentent pas de référer à des réalités verbales. Le naturalisme, à la fin du siècle, a complètement défait l'isolement du dialogue en l'amalgamant avec la narration. Les résultats historiques de cette étude sont à approfondir. Mais elle montre, sur plan théorique, la possibilité de s'affranchir des difficiles questions d'énonciation quand on aborde le dialogue de roman.

  4. Michaux, «Le Jardin Exalté»

    Directory of Open Access Journals (Sweden)

    Vera Lúcia de Carvalho Casa Nova

    2011-10-01

    Full Text Available Resumo: Esse ensaio resulta de uma leitura do texto de H. Michaux, focalizando a relação entre as artes na escritura desse autor.Palavras-chave: Literatura francesa; Henri Michaux; Le Jardin Exalté; artes.Résumé: Cet essai est le résultat d’une lecture qui montre les relations entre les arts dans l’écriture Henri Michaux.Mots-clés: Littérature française; Henri Michaux; Le Jardin Exalté; arts.Keywords: French literature; Henri Michaux; Le Jardin Exalté; arts.

  5. Leïomyosarcome de la prostate: Neoplasie rare

    Directory of Open Access Journals (Sweden)

    D. Basraoui

    2012-03-01

    La TDM et surtout l'IRM jouent un rôle primordial dans le bilan d'extension locale et à distance du léïomyosarcome prostatique et le seul moyen pour affirmer le diagnostic est l'histologie complétée par une étude immuno-histochimique. Leur prise en charge thérapeutique n'est pas codifiée à l'heure actuelle et leur pronostic reste très sombre.

  6. Le paysage anglais: du jardin à la campagne

    Directory of Open Access Journals (Sweden)

    Gilly LEHMANN

    1987-12-01

    Full Text Available Lele des jardins dans le paysage anglais tient tout autant à ce qui se passe dans les esprits qu'aux réalités concrètes. L'apogée dans la création des jardins et des parcs influant sur le paysage campagnard a lieu au 18e siècle. Les créateurs d'alors visent à construire un paysage idéal; les périodes suivantes proposeront aussi les leurs.

  7. K{sup -} and p-bar spectra for AuAu collisions at {radical}s = 200 GeV from STAR, PHENIX, and BRAHMS in comparison to core-corona model predictions

    Energy Technology Data Exchange (ETDEWEB)

    Schreiber, C.; Werner, K.; Aichelin, J. [Universite de Nantes, SUBATECH (France)

    2012-05-15

    Based on results obtained with event generators we have launched the core-corona model. It describes in a simplified way but quite successfully the centrality dependence of multiplicity and of identified particles observed in heavy-ion reactions at beam energies between {radical}s = 17 and 200 GeV. Also the centrality dependence of the elliptic flow, {upsilon}{sub 2}, for all charged and identified particles could be explained in this model. Here we extend this analysis and study the centrality dependence of single-particle spectra of K{sup -} and p-bar measured by the PHENIX, STAR, and BRAHMS Collaborations. We find that also for these particles the analysis of the spectra in the core-corona model suffers from differences in the data published by the different experimental groups, notably for the pp collisions. As for protons and K{sup +}, for each experience the data agree well with the prediction of the core-corona model but the values of the two necessary parameters depend on the experiments. We show as well that the average momentum as a function of the centrality depends in a very sensitive way on the particle species and may be quite different for particles which have about the same mass. Therefore the idea to interpret this centrality dependence as a consequence of a collective expansion of the system, as done in blast way fits, may be premature.

  8. K - and bar p spectra for AuAu collisions at √s = 200 GeV from STAR, PHENIX, and BRAHMS in comparison to core-corona model predictions

    Science.gov (United States)

    Schreiber, C.; Werner, K.; Aichelin, J.

    2012-05-01

    Based on results obtained with event generators we have launched the core-corona model. It describes in a simplified way but quite successfully the centrality dependence of multiplicity and of identified particles observed in heavy-ion reactions at beam energies between √s = 17 and 200 GeV. Also the centrality dependence of the elliptic flow, υ 2, for all charged and identified particles could be explained in this model. Here we extend this analysis and study the centrality dependence of single-particle spectra of K - and bar p measured by the PHENIX, STAR, and BRAHMS Collaborations. We find that also for these particles the analysis of the spectra in the core-corona model suffers from differences in the data published by the different experimental groups, notably for the pp collisions. As for protons and K +, for each experience the data agree well with the prediction of the core-corona model but the values of the two necessary parameters depend on the experiments. We show as well that the average momentum as a function of the centrality depends in a very sensitive way on the particle species and may be quite different for particles which have about the same mass. Therefore the idea to interpret this centrality dependence as a consequence of a collective expansion of the system, as done in blast way fits, may be premature.

  9. $K^-$ and $\\bar p$ Spectra for Au+Au Collisions at $\\sqrt{s}$ = 200 GeV from STAR, PHENIX and BRAHMS in Comparison to Core-Corona Model Predictions

    CERN Document Server

    Schreiber, C; Aichelin, J

    2012-01-01

    Based on results obtained with event generators we have launched the core-corona model. It describes in a simplified way but quite successfully the centrality dependence of multiplicity and $$ of identified particles observed in heavy-ion reaction at beam energies between $\\sqrt{s}$ = 17 GeV and 200 GeV. Also the centrality dependence of the elliptic flow, $v_2$, for all charged and identified particles could be explained in this model. Here we extend this analysis and study the centrality dependence of single particle spectra of $K^-$ and ${\\bar p}$ measured by the PHENIX, STAR and BRAHMS collaborations. We find that also for these particles the analysis of the spectra in the core-corona model suffers from differences in the data published by the different experimental groups, notably for the pp collisions. As for protons and $K^+$ for each experience the data agree well with the prediction of the core-corona model but the value of the two necessary parameters depends on the experiments. We show as well that...

  10. K- and /line p Spectra for Au+Au Collisions at √ s = 200 GeV from Star, Phenix and Brahms in Comparison to Core-Corona Model Predictions

    Science.gov (United States)

    Schreiber, C.; Werner, K.; Aichelin, J.

    2012-01-01

    Based on results obtained with event generators we have launched the core-corona model. It describes in a simplified way but quite successfully the centrality dependence of multiplicity and of identified particles observed in heavy ion reaction at beam energies between √ s = 17 GeV and 200GeV. Also the centrality dependence of the elliptic flow, ν2, for all charged and identified particles could be explained in this model. Here we extend this analysis and study the centrality dependence of single particle spectra of K- and /line p measured by the PHENIX, STAR and BRAHMS collaborations. We find that also for these particles the analysis of the spectra in the core-corona model suffers from differences in the data published by the different experimental groups, notably for the pp collisions. As for protons and K+ for each experience the data agree well with the prediction of the core-corona model but the value of the two necessary parameters depends on the experiments. We show as well that the average momentum as a function of the centrality depends in a very sensitive way on the particle species and may be quite different for particle which have about the same mass. Therefore the idea to interpret this centrality dependence as a consequence of a collective expansion of the system, as done in blast way fits may be premature.

  11. IAEA coordinated research program on `harmonization and validation of fast reactor thermomechanical and thermohydraulic codes using experimental data`. 1. Thermohydraulic benchmark analysis on high-cycle thermal fatigue events occurred at French fast breeder reactor Phenix

    Energy Technology Data Exchange (ETDEWEB)

    Muramatsu, Toshiharu [Power Reactor and Nuclear Fuel Development Corp., Oarai, Ibaraki (Japan). Oarai Engineering Center

    1997-06-01

    A benchmark exercise on `Tee junction of Liquid Metal Fast Reactor (LMFR) secondary circuit` was proposed by France in the scope of the said Coordinated Research Program (CRP) via International Atomic Energy Agency (IAEA). The physical phenomenon chosen here deals with the mixture of two flows of different temperature. In a LMFR, several areas of the reactor are submitted to this problem. They are often difficult to design, because of the complexity of the phenomena involved. This is one of the major problems of the LMFRs. This problem has been encountered in the Phenix reactor on the secondary loop, where defects in a tee junction zone were detected during a campaign of inspections after an operation of 90,000 hours of the reactor. The present benchmark is based on an industrial problem and deal with thermal striping phenomena. Problems on pipes induced by thermal striping phenomena have been observed in some reactors and experimental facilities coolant circuits. This report presents numerical results on thermohydraulic characteristics of the benchmark problem, carried out using a direct numerical simulation code DINUS-3 and a boundary element code BEMSET. From the analysis with both the codes, it was confirmed that the hot sodium from the small pipe rise into the cold sodium of the main pipe with thermally instabilities. Furthermore, it was indicated that the coolant mixing region including the instabilities agrees approximately with the result by eye inspections. (author)

  12. Quand le terrain s’impose, le récit aussi

    Directory of Open Access Journals (Sweden)

    Nicolas Journet

    2009-03-01

    Full Text Available Quand le terrain s’impose, le récit aussi. L’exposé synoptique qui, selon Johannes Fabian, caractérise le genre anthropologique savant et marque ses limites laisse, en fait, parfois la place à des épisodes narratifs. Sur la base de quelques exemples, on suggère que ces récits semblent intervenir lorsque l’auteur veut restituer le mouvement par lequel il a été amené à changer d’idées ou de projets par l’évidence que lui impose le terrain. Et souvent aussi, cette articulation est déterminante pour l’orientation de l’écrit proposé. Ce n’est donc pas seulement un procédé rhétorique, mais une forme qui s’impose d’elle-même.When the field imposes itself, so does the narrative. The synoptic account which, according to Johannes Fabian, characterises the learned anthropological genre and its limitations actually leaves room, on occasion, for narrative episodes. Drawing on a number of examples, this article suggests that these narratives appear to occur when the author wishes to reconstruct the movement through which he was led to change his views or projects because of evidence imposed on him by the field. And often, this link is decisive in determining the orientation of the writing. It is therefore more than just a rhetorical procedure, but a form that imposes itself.

  13. Lele de l’omalizumab dans le traitement de l’asthme allergique grave

    Science.gov (United States)

    Chapman, Kenneth R; Cartier, André; Hébert, Jacques; McIvor, R Andrew; Schellenberg, R Robert

    2006-01-01

    CONTEXTE : Un nouveau traitement anti-immunoglobuline E (anti-IgE) contre l’asthme, l’omalizumab, a été approuvé au Canada. OBJECTIF : Passer en revue les données fondamentales et cliniques sur l’omalizumab et examiner lele possible de ce médicament dans la prise en charge de l’asthme au Canada. MÉTHODOLOGIE : Une recherche documentaire a été effectuée dans MEDLINE afin de repérer les études menées de 1960 à 2006 sur l’omalizumab. La recherche a également porté sur les résumés de réunions scientifiques récentes dans le domaine des maladies respiratoires et des allergies; par ailleurs, toute donnée non publiée a été demandée au fabricant. Après avoir revu et résumé les données, un comité mixte constitué de spécialistes des maladies respiratoires et des allergies a rédigé un ensemble de recommandations relatives à l’utilisation de l’omalizumab. RÉSULTATS : L’omalizumab est un anticorps monoclonal humanisé qui se lie au domaine C epsilon 3 de la molécule d’IgE pour former des complexes immuns solubles qui sont éliminés par le système réticulo-endothélial. L’administration d’injections sous-cutanées espacées de deux ou de quatre semaines à la dose recommandée entraîne une diminution rapide des taux d’IgE circulantes libres. Lors de deux essais cliniques de phase III menés auprès de 1 405 adultes et adolescents atteints d’asthme modéré à grave qui recevaient des doses moyennes stables de corticostéroïdes en inhalation (CSI), l’omalizumab a diminué les taux d’exacerbation par rapport au placebo et a été associé à une amélioration des symptômes ainsi qu’à une épargne plus importante des corticostéroïdes. Dans un essai mené auprès de 419 patients atteints d’asthme grave non maîtrisé malgré l’utilisation de doses élevées de CSI et de la prise concomitante d’agonistes bêta-2 à action prolongée, les exacerbations graves étaient de 50 % moins fréquentes chez

  14. Théâtre Le Poche

    CERN Multimedia

    Théâtre Le Poche

    2012-01-01

    Du 9 au 19 février Lundi, vendredi 20h30 Mercredi, jeudi, samedi 19h Dimanche 17h    LES TERRIENS (assurez-vous que vous faites totalement autre chose) Mise en scène Claire Rengade   Obnubilée par la parole, Claire Rengade propose avec Les Terriens une recherche singulière et passionnée, une forme très novatrice entre théâtre, poésie et reportage. Après une enquête au CERN, la jeune auteure et metteure en scène choisit comme thème de sa nouvelle création une grande machine, centre de recherche scientifique de la plus grande avancée technologique. Avec Les Terriens Claire Rengade poursuit sa quête d’un langage au flux impressionniste, foisonnant, jubilatoire, voire délirant, où le plaisir de dire le texte, tel une partition musicale, est toujours au cœur de la repr...

  15. Théâtre Le Poche

    CERN Multimedia

    Théâtre Le Poche

    2012-01-01

    LES TERRIENS (assurez-vous que vous faites totalement autre chose)   Mise en scène Claire Rengade   Obnubilée par la parole, Claire Rengade propose avec Les Terriens une recherche singulière et passionnée, une forme très novatrice entre théâtre, poésie et reportage. Après une enquête au CERN, la jeune auteure et metteure en scène choisit comme thème de sa nouvelle création une grande machine, centre de recherche scientifique de la plus grande avancée technologique. Avec Les Terriens Claire Rengade poursuit sa quête d’un langage au flux impressionniste, foisonnant, jubilatoire, voire délirant, où le plaisir de dire le texte, tel une partition musicale, est toujours au cœur de la représentation. PRIX SPÉCIAL POUR LES EMPLOYÉS DU CERN : CHF 22.- AU LIEU ...

  16. Le caratteristiche linguistiche del foglietto illustrativo

    Directory of Open Access Journals (Sweden)

    Silvia Giumelli

    2013-07-01

    Full Text Available Nell’articolo si affronta il problema della comprensibilità del foglietti illustrativi (i bugiardini” allegati ai medicinali, di cui indicano posologia, modalità d’uso ed effetti indesiderati (FI nel testo. Linguisticamente il testo dei FI si pone nel più ampio contesto dei linguaggi specialistici, ma si distingue per alcune particolarità (il destinatario e la funzione che ricopre. Attraverso l’analisi del FI presente in un comune antipiretico, Tachipirina 1000 ®, si mettono in evidenza le strategie comunicative messe in atto dall’estensore e il grado di comprensione da parte del presunto destinatario. L’analisi mette inoltre in luce le caratteristiche comuni di questo tipo di testi altamente specialistici con il linguaggio settoriale della medicina.  Language features of medicine packaging leaflets This article addresses the problem of the comprehensibility of the leaflets in medicine packaging which indicate dosage, method of use and side effects (FI in the text. Linguistically, the text of the FI is placed in the broader context of specialist languages, but it is characterized by some peculiarities (the recipient and the role it plays. By analyzing the FI of a common antipyretic, paracetamol 1000 ®, we highlight the communicative strategies put in place by the author and the degree of understanding on the part of the intended recipient. The analysis also highlights the common features of this type of highly specialized text with the technical language of medicine.

  17. Le cours de physique de Feynman

    CERN Document Server

    Feynman, Richard; Sands, Matthew

    L’ampleur du succès qu’a rencontré le « Cours de physique de Feynman » dès sa parution s’explique par son caractère fondamentalement novateur. Richard Feynman, qui fut professeur d’université dès l’âge de vingt-quatre ans, a exprimé dans ce cours, avant d’obtenir le prix Nobel de Physique, une vision expérimentale et extrêmement personnelle de l’enseignement de la physique. Cette vision a, depuis, remporté l’adhésion des physiciens du monde entier, faisant de cet ouvrage un grand classique. Ce cours en cinq volumes (Électromagnétisme 1 et 2, Mécanique 1 et 2, Mécanique quantique) s’adresse aux étudiants de tous niveaux qui y trouveront aussi bien les notions de base débarrassées de tout appareil mathématique inutile, que les avancées les plus modernes de cette science passionnante qu’est la physique. Cette nouvelle édition corrigée bénéficie d’une mise en page plus aérée pour un meilleur confort de lecture.

  18. Le Pédantisme dans Lolita

    OpenAIRE

    Delage-Toriel, Lara

    2010-01-01

    A mi-chemin du pédagogue au pédophile, la langue française a – pour pasticher Ponge avec force plosives – « pédant », assorti de ses divers dérivés, « pédantisme » bien sûr, mais également « pédanterie », « pédanter », « pédantiser », « pédantesque », « pédantesquement », « pédantaille », « pédantocratie » et autres coquetteries dont elle a le secret. Comme ses voisins, sieurs pédagogue et pédophile, le terme ‘pédant’ est né de sa relation à l’enfant, ou pais, paidos en grec. Ainsi, à l’égal ...

  19. Le choix de l'excellence

    CERN Document Server

    Collins, Jim

    2012-01-01

    Dix ans après le succès mondial de De la performance à l'excellence (Good to Great), Jim Collins et son associé Morten T. Hansen s'interrogent ici sur la nature de l excellence en période d incertitude. Pourquoi, dans un contexte chaotique, certaines entreprises sont florissantes et d autres non ? Comment, en ces temps troublés, réussir à diriger et vaincre l adversité pour dominer son marché ? La chance peut-elle sérieusement être envisagée comme un facteur de réussite ? À l issue d un programme de recherche ambitieux et rigoureux qui a duré neuf ans, les auteurs exposent dans cet ouvrage les nouveaux principes pour bâtir une entreprise réellement excellente. Leurs conclusions sont, comme toujours, étonnantes. Ils soulignent notamment que la course à l innovation n est pas toujours la meilleure voie à suivre, que discipline et créativité peuvent aller de concert et que malgré le changement permanent, les meilleures décisions sont rarement prises dans l urgence. Quant aux leaders, on...

  20. Roman historique et Histoire dans le roman

    Directory of Open Access Journals (Sweden)

    Christine Di Benedetto

    2008-12-01

    Full Text Available Engager une réflexion sur le « roman historique » dans l’Espagne de l’après-transition démocratique conduit ici à aborder les questions, plus vastes, d’Histoire dans le roman et de roman de la mémoire. Mais les notions de passé et de présent et leurs rapports se définissent au regard de la situation particulière de l’Espagne. L’interprétation de la place qu’occupe le roman historique dans le panorama romanesque espagnol s’enrichit alors des perspectives issues de la philosophie et de la sociologie.Au confluent de ces démarches, des exemples tirés de la littérature contemporaine et étayés par des éléments d’analyse fictionnelle et narrative figurent trois niveaux d’intégration de l’Histoire récente dans le roman espagnol. Et une identité en devenir se dessine, alors que la mémoire historique arrive clairement sur la scène littéraire en même temps qu’elle s’insinue dans les problématiques qui occupent la société espagnole de la fin du millénaire.Adentrarse en una reflexión sobre “la novela histórica” en la España de la post- transición democrática lleva aquí a acercarse a los temas, más amplios, de Historia en la novela y de novela de la memoria. Pero las nociones de pasado y de presente se definen en el ámbito de la situación peculiar de España, y de allí el vínculo cualitativo entre las dos. La interpretación del puesto que ocupa en la narrativa española se enriquece entonces de las perspectivas que proceden de la filosofía y de la sociología.En el confluente de estas modalidades reflexivas, unos ejemplos, sacados de la literatura contemporánea y estudiados gracias a elementos de análisis de la ficción y de la narración destacan tres niveles de integración de la Historia reciente en la novela española. De modo que una búsqueda identitaria se define, mientras la memoria histórica llega claramente al escenario literario, al mismo tiempo que se cuela dentro de las