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Sample records for membranaires radio-induits comme

  1. Dysfonctionnements radio-induits du transport colique chez le rat

    NASA Astrophysics Data System (ADS)

    François, A.; Lebrun, F.; Ksas, B.; Aigueperse, J.; Gourmelon, P.; MacNaughton, W. K.; Griffiths, N. M.

    1998-04-01

    The symptom commonly associated with whole body irradiation is diarrhoea, a still quite obscure phenomenon, which leads to decreased chance of cure of irradiated people. The aim of this study was to provide evidence for dysfunction of intestinal water and electrolyte transport regulation by the enteric nervous system after exposure to ionising radiation. This study shows decreased capacity of enteric nervous system to influence colonic transport 3days after irradiation, correlated to a diminished response to a neurotransmitter: serotonin. Radio-induced diarrhea may result from epithelial structural injury but also from impaired regulatory processes of intestinal transport. L'un des symptômes majeurs d'une irradiation corporelle totale ou abdominale est l'apparition de diarrhées, dont les causes sont encore mal connues, et qui mettent en jeu le pronostique vital de l'individu irradié. Cette étude vise à mettre en évidence l'atteinte de la régulation du transport intestinal d'eau et d'électrolytes par les rayonnements ionisants. On observe une diminution de la capacité du système nerveux entérique à influencer le transport colique 3jours après irradiation, corrélée à une diminution de la réponse épithéliale à un neurotransmetteur : la sérotonine. Les diarrhées radio-induites résulteraient d'une atteinte structurelle de l'épithélium mais également des processus de régulation du transport intestinal.

  2. PbCdlComm

    Energy Science and Technology Software Center (ESTSC)

    2008-05-20

    The open-source PBCdlComm software is designed for data acquisition from PakBus-protocol based Campbell Data loggers by the Scientific Data Management team at Pacific Northwest National Laboratory (www.pnl.gov). This effort was funded by US Department of Energy's Atmospheric Radiation Measurement program (www.arm.gov). As an alternative for Campbell Scientific's Loggernet software, this is ideal for deploying with rugged field PCs that have limited processing resources and do not require a full-blown GUI module. The software is designedmore » so that it can be extended to implement a new data storage mechanism, a customized post-processing module and/or integrated with web-services for sophisticated monitoring or reporting.« less

  3. RAD/COMM ''Cricket'' Test Report

    SciTech Connect

    Chiaro, P.J.

    2002-05-20

    A series of tests were performed at Oak Ridge National Laboratory (ORNL) to evaluate and characterize the radiological response of a ''Cricket'' radiation detection system. The ''Cricket'' is manufactured by RAD/COMM Systems Corp., which is located in Ontario, Canada. The system is designed to detect radioactive material that may be contained in scrap metal. The Cricket's detection unit is mounted to the base of a grappler and monitors material, while the grappler's tines hold the material. It can also be used to scan material in an attempt to isolate radioactive material if an alarm occurs. Testing was performed at the Environmental Effects Laboratory located at ORNL and operated by the Engineering Science and Technology Division. Tests performed included the following: (1) Background stability, (2) Energy response using {sup 241}Am, {sup 137}Cs, and {sup 60}Co, (3) Surface uniformity, (4) Angular dependence, (5) Alarm actuation, (6) Alarm threshold vs. background, (7) Shielding, (8) Response to {sup 235}U, (9) Response to neutrons using unmoderated {sup 252}Cf, and (10) Response to transient radiation. This report presents a summary of the test results. Background measurements were obtained prior to the performance of each individual test.

  4. RAD/COMM Cricket Test Report

    SciTech Connect

    Chiaro, PJ

    2003-08-28

    The Environmental Effects Laboratory of the Engineering Science and Technology Division of Oak Ridge National Laboratory performed a series of tests to further evaluate and characterize the radiological response of a ''Cricket'' radiation detection system. The Cricket, manufactured by Rad/Comm Systems Corporation of Ontario, Canada, is designed to detect radioactive material that may be contained in scrap metal. The Cricket's detection unit is designed to be mounted to the base of a grappler, allowing it to monitor material while the material is being held by the grappler tines. The Cricket was tested for background stability, energy response, spherical response, surface uniformity, angular dependence, and alarm actuation. Some of these tests were repeated from a prior test of a Cricket at the Environmental Effects Laboratory as reported in ORNL/TM-2002/94. Routine environmental tests--normal temperature and relatively humidity--were also performed as part of this testing process. Overall, the Cricket performed well during the testing process. The design of the instrument and the inherent photon energy of the radionuclides had some affect on portions of the tests but do not detract from the value-added benefits of the Cricket's detection capabilities.

  5. Data Comm Flight Deck Human-in-the-Loop Simulation

    NASA Technical Reports Server (NTRS)

    Lozito, Sandra; Martin, Lynne Hazel; Sharma, Shivanjli; Kaneshige, John T.; Dulchinos, Victoria

    2012-01-01

    This presentation discusses an upcoming simulation for data comm in the terminal area. The purpose of the presentation is to provide the REDAC committee with a summary of some of the work in Data Comm that is being sponsored by the FAA. The focus of the simulation is upon flight crew human performance variables, such as crew procedures, timing and errors. The simulation is scheduled to be conducted in Sept 2012.

  6. CommServer: A Communications Manager For Remote Data Sites

    NASA Astrophysics Data System (ADS)

    Irving, K.; Kane, D. L.

    2012-12-01

    CommServer is a software system that manages making connections to remote data-gathering stations, providing a simple network interface to client applications. The client requests a connection to a site by name, and the server establishes the connection, providing a bidirectional channel between the client and the target site if successful. CommServer was developed to manage networks of FreeWave serial data radios with multiple data sites, repeaters, and network-accessed base stations, and has been in continuous operational use for several years. Support for Iridium modems using RUDICS will be added soon, and no changes to the application interface are anticipated. CommServer is implemented on Linux using programs written in bash shell, Python, Perl, AWK, under a set of conventions we refer to as ThinObject.

  7. Consortium for Algal Biofuel Commercialization (CAB-COMM) Final Report

    SciTech Connect

    Mayfield, Stephen P.

    2015-12-04

    The Consortium for Algal Biofuel Commercialization (CAB-Comm) was established in 2010 to conduct research to enable commercial viability of alternative liquid fuels produced from algal biomass. The main objective of CAB-Comm was to dramatically improve the viability of algae as a source of liquid fuels to meet US energy needs, by addressing several significant barriers to economic viability. To achieve this goal, CAB-Comm took a diverse set of approaches on three key aspects of the algal biofuels value chain: crop protection; nutrient utilization and recycling; and the development of genetic tools. These projects have been undertaken as collaboration between six academic institutions and two industrial partners: University of California, San Diego; Scripps Institution of Oceanography; University of Nebraska, Lincoln; Rutgers University; University of California, Davis; Johns Hopkins University; Sapphire Energy; and Life Technologies.

  8. Use of Data Comm by Flight Crew in High-Density Terminal Areas

    NASA Technical Reports Server (NTRS)

    Baxley, Brian T.; Norman, Robert M.; Ellis, Kyle K. E.; Latorella, Kara A.; Comstock, James R.; Adams, Cathy A.

    2010-01-01

    This paper describes a collaborative FAA and NASA experiment using 22 commercial airline pilots to determine the effect of using Datalink Communication (Data Comm) to issue messages in busy, terminal area operations. Four conditions were defined that span current day to future flight deck equipage levels (voice communication only, Data Comm only, Data Comm with Moving Map Display, Data Comm with Moving Map displaying taxi route), and each condition was used to create an arrival and a departure scenario at the Boston Logan Airport. These eight scenarios were repeated twice for a total of 16 scenarios for each of the eleven crews. Quantitative data was collected on subject reaction time and eye tracking information. Questionnaires collected subjective feedback on workload and acceptability to the flight crew for using Data Comm in a busy terminal area. 95% of the Data Comm messages were responded to by the flight crew within one minute; however, post experiment debrief comments revealed almost unanimous consensus that two minutes was a reasonable expectation for crew response. Eye tracking data indicated an insignificant decrease in head-up time for the Pilot Flying when Data Comm was introduced; however, the Pilot Monitoring had significantly less head-up time. Data Comm workload was rated as operationally acceptable by both crew members in all conditions in flight at any altitude above the Final Approach Fix in terms of response time and workload. Results also indicate the use of Data Comm during surface operations was acceptable, the exception being the simultaneous use of voice, Data Comm, and audio chime required for an aircraft to cross an active runway. Many crews reported they believed Data Comm messages would be acceptable after the Final Approach Fix or to cross a runway if the message was not accompanied by a chime and there was not a requirement to immediately respond to the uplink message.

  9. Visual Data Comm: A Tool for Visualizing Data Communication in the Multi Sector Planner Study

    NASA Technical Reports Server (NTRS)

    Lee, Hwasoo Eric

    2010-01-01

    Data comm is a new technology proposed in future air transport system as a potential tool to provide comprehensive data connectivity. It is a key enabler to manage 4D trajectory digitally, potentially resulting in improved flight times and increased throughput. Future concepts with data comm integration have been tested in a number of human-in-the-loop studies but analyzing the results has proven to be particularly challenging because future traffic environment in which data comm is fully enabled has assumed high traffic density, resulting in data set with large amount of information. This paper describes the motivation, design, current and potential future application of Visual Data Comm (VDC), a tool for visualizing data developed in Java using Processing library which is a tool package designed for interactive visualization programming. This paper includes an example of an application of VDC on data pertaining to the most recent Multi Sector Planner study, conducted at NASA s Airspace Operations Laboratory in 2009, in which VDC was used to visualize and interpret data comm activities

  10. ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: COMM ENGINEERING, USA ENVIRONMENTAL VAPOR RECOVERY UNIT (EVRU)

    EPA Science Inventory

    This report documents the testing of a new technology that recovers and utilizes vapors from crude oil storage tanks employed in the oil production and processing industry. The COMM Engineering, USA Environmental Vapor Recovery Unit (EVRU) is a non-mechanical eductor, or jet pump...

  11. DataComm in Flight Deck Surface Trajectory-Based Operations. Chapter 20

    NASA Technical Reports Server (NTRS)

    Bakowski, Deborah L.; Foyle, David C.; Hooey, Becky L.; Meyer, Glenn R.; Wolter, Cynthia A.

    2012-01-01

    The purpose of this pilot-in-the-loop aircraft taxi simulation was to evaluate a NextGen concept for surface trajectory-based operations (STBO) in which air traffic control (ATC) issued taxi clearances with a required time of arrival (RTA) by Data Communications (DataComm). Flight deck avionics, driven by an error-nulling algorithm, displayed the speed needed to meet the RTA. To ensure robustness of the algorithm, the ability of 10 two-pilot crews to meet the RTA was tested in nine experimental trials representing a range of realistic conditions including a taxi route change, an RTA change, a departure clearance change, and a crossing traffic hold scenario. In some trials, these DataComm taxi clearances or clearance modifications were accompanied by preview information, in which the airport map display showed a preview of the proposed route changes, including the necessary speed to meet the RTA. Overall, the results of this study show that with the aid of the RTA speed algorithm, pilots were able to meet their RTAs with very little time error in all of the robustness-testing scenarios. Results indicated that when taxi clearance changes were issued by DataComm only, pilots required longer notification distances than with voice communication. However, when the DataComm was accompanied by graphical preview, the notification distance required by pilots was equivalent to that for voice.

  12. DataComm in Flight Deck Surface Trajectory-Based Operations

    NASA Technical Reports Server (NTRS)

    Bakowski, Deborah L.; Foyle, David C.; Hooey, Becky L.; Meyer, Glenn R.; Wolter, Cynthia A.

    2012-01-01

    The purpose of this pilot-in-the-loop aircraft taxi simulation was to evaluate a NextGen concept for surface trajectory-based operations (STBO) in which air traffic control (ATC) issued taxi clearances with a required time of arrival (RTA) by Data Communications (DataComm). Flight deck avionics, driven by an error-nulling algorithm, displayed the speed needed to meet the RTA. To ensure robustness of the algorithm, the ability of 10 two-pilot crews to meet the RTA was tested in nine experimental trials representing a range of realistic conditions including a taxi route change, an RTA change, a departure clearance change, and a crossing traffic hold scenario. In some trials, these DataComm taxi clearances or clearance modifications were accompanied by 'preview' information, in which the airport map display showed a preview of the proposed route changes, including the necessary speed to meet the RTA. Overall, the results of this study show that with the aid of the RTA speed algorithm, pilots were able to meet their RTAs with very little time error in all of the robustness-testing scenarios. Results indicated that when taxi clearance changes were issued by DataComm only, pilots required longer notification distances than with voice communication. However, when the DataComm was accompanied by graphical preview, the notification distance required by pilots was equivalent to that for voice.

  13. VibeComm: radio-free wireless communication for smart devices using vibration.

    PubMed

    Hwang, Inhwan; Cho, Jungchan; Oh, Songhwai

    2014-01-01

    This paper proposes VibeComm, a novel communication method for smart devices using a built-in vibrator and accelerometer. The proposed approach is ideal for low-rate off-line communication, and its communication medium is an object on which smart devices are placed, such as tables and desks. When more than two smart devices are placed on an object and one device wants to transmit a message to the other devices, the transmitting device generates a sequence of vibrations. The vibrations are propagated through the object on which the devices are placed. The receiving devices analyze their accelerometer readings to decode incoming messages. The proposed method can be the alternative communication method when general types of radio communication methods are not available. VibeComm is implemented on Android smartphones, and a comprehensive set of experiments is conducted to show its feasibility. PMID:25390406

  14. VibeComm: Radio-Free Wireless Communication for Smart Devices Using Vibration

    PubMed Central

    Hwang, Inhwan; Cho, Jungchan; Oh, Songhwai

    2014-01-01

    This paper proposes VibeComm, a novel communication method for smart devices using a built-in vibrator and accelerometer. The proposed approach is ideal for low-rate off-line communication, and its communication medium is an object on which smart devices are placed, such as tables and desks. When more than two smart devices are placed on an object and one device wants to transmit a message to the other devices, the transmitting device generates a sequence of vibrations. The vibrations are propagated through the object on which the devices are placed. The receiving devices analyze their accelerometer readings to decode incoming messages. The proposed method can be the alternative communication method when general types of radio communication methods are not available. VibeComm is implemented on Android smartphones, and a comprehensive set of experiments is conducted to show its feasibility. PMID:25390406

  15. Flight Crew Workload, Acceptability, and Performance When Using Data Comm in a High-Density Terminal Area Simulation

    NASA Technical Reports Server (NTRS)

    Norman, R. Michael; Baxley, Brian T.; Adams, Cathy A.; Ellis, Kyle K. E.; Latorella, Kara A.; Comstock, James R., Jr.

    2013-01-01

    This document describes a collaborative FAA/NASA experiment using 22 commercial airline pilots to determine the effect of using Data Comm to issue messages during busy, terminal area operations. Four conditions were defined that span current day to future flight deck equipage: Voice communication only, Data Comm only, Data Comm with Moving Map Display, and Data Comm with Moving Map displaying taxi route. Each condition was used in an arrival and a departure scenario at Boston Logan Airport. Of particular interest was the flight crew response to D-TAXI, the use of Data Comm by Air Traffic Control (ATC) to send taxi instructions. Quantitative data was collected on subject reaction time, flight technical error, operational errors, and eye tracking information. Questionnaires collected subjective feedback on workload, situation awareness, and acceptability to the flight crew for using Data Comm in a busy terminal area. Results showed that 95% of the Data Comm messages were responded to by the flight crew within one minute and 97% of the messages within two minutes. However, post experiment debrief comments revealed almost unanimous consensus that two minutes was a reasonable expectation for crew response. Flight crews reported that Expected D-TAXI messages were useful, and employment of these messages acceptable at all altitude bands evaluated during arrival scenarios. Results also indicate that the use of Data Comm for all evaluated message types in the terminal area was acceptable during surface operations, and during arrivals at any altitude above the Final Approach Fix, in terms of response time, workload, situation awareness, and flight technical performance. The flight crew reported the use of Data Comm as implemented in this experiment as unacceptable in two instances: in clearances to cross an active runway, and D-TAXI messages between the Final Approach Fix and 80 knots during landing roll. Critical cockpit tasks and the urgency of out-the window scan made the

  16. Boîtes quantiques II-VI comme sources de photons uniques

    NASA Astrophysics Data System (ADS)

    Couteau, C.; Moehl, S.; Tinjod, F.; Suffczynski, J.; Romestain, R.; Vial, J.-C.; Gérard, J.-M.; Kheng, K.; Poizat, J.-P.

    2004-11-01

    Dans le cadre de l'information et de la communication quantique, la nécessité d'avoir des photons uniques monomodes et à la demande se révèle cruciale. De récents travaux théoriques ont montré la possibilité de réaliser des portes logiques quantiques n'utilisant que de l'optique linéaire. C'est dans ce contexte que s'insère notre travail sur l'élaboration et l'utilisation de boîtes quantiques semi-conductrices II-VI comme “pistolet” à photons. Des expériences de dégroupement et d'interférences à 2 photons sont les premiers pas nécessaires pour caractériser notre source.

  17. Mars Comm/Nav MicroSat Network Using the Multi-Mission Bus Launched Piggyback by Ariane 5

    NASA Technical Reports Server (NTRS)

    Hastrup, R. C.; Cesarone, R. J.; Morabito, D. D.

    1999-01-01

    Recently, NASA's Jet Propulsion Laboratory completed a Mars Exploration Program Architecture Definition Study with strong international participation. The recommendations of this study include establishment of a low cost in-situ communications and navigation satellite network to provide enabling and enhancing support for the international exploration of Mars. This would be the first step toward establishing a "virtual presence throughout the solar system" as called for in NASA's Strategic Plan. Response to the proposed comm/nav satellite network has been very favorably received, as reflected by the inclusion of a line item in NASA's budget submittal to Congress, which provides funding for implementation of the network with first launch in the 2003 opportunity. Funding has already been provided for a phase A study being conducted this year. This paper presents the planned implementation of the comm/nav network, which will utilize microsats based on a multi-mission spacecraft bus being designed for launch by the Ariane 5 as a secondary payload. A companion paper at this conference, entitled "The Multi-Purpose Mars Micro-Mission System Design Utilizing Ariane 5 Piggyback Launch", describes the multimission bus design. This paper addresses the application of the multi-mission bus to the comm/nav microsat mission. Following an introduction, which provides the background that has led to the proposed comm/nav network, the paper discusses the projected user needs with emphasis on the various possible robotic missions (landers, rovers, ascent vehicles, balloons, aircraft, etc.) progressing toward eventual piloted missions. Next, the paper describes the concept for an evolving network of comm/nav microsats and the expected capability to satisfy the user needs. Results of communications and navigation performance analysis are summarized for attractive satellite constellation configurations. The important comm/nav microsat functional requirements on the multi

  18. Approche morphologique de la fragmentation de l'ADN radio-induite par immunomarquage anti-poly (ADP-ribose) polymérase (PARP) : étude de cultures d'oligodendrogliomes

    NASA Astrophysics Data System (ADS)

    Varlet, P.; Beuvon, F.; Cervera, P.; Averbeck, D.; Daumas-Duport, C.

    1998-04-01

    Poly (ADP-ribose) polymerase (PARP) is a nuclear enzyme encompassing two zinc finger motifs which specifically binds to radiation induced DNA strand breaks. We develop a new immuno-labelling of poly ADP-ribose which coupled together with the immunodetection of cells in cycle with MIB1, permits to detect and quantify the DNA fragmentation induced by radiations (Cesium137). This method, applied to organotypical cultures of human oligodendroglioma, submitted to radiation, a dose dependant nuclear signal. This one increased significantly in the presence of a radiosensitizer like iododeoxyuridine (IUDR 5 g/ml). This poly ADP-ribose immunodetection can be useful, to detect furtherly the individual radiosensitivity of human glioma. Les protéases “ICE-like" ou caspases, sont les homologues humaines du produit du gène ced-3 du ver Caenorhabditis elegans et sont activées lors des étapes précoces de l'apoptose. L'objectif de ce travail vise à déterminer dans quelle mesure l'inhibition de l'une d'entre elles, la caspase-3 est susceptible de modifier la sensibilité des cellules vis-à-vis de l'apoptose radioinduite. Des lymphocytes spléniques murins irradiés en présence de Ac-DVED-CHO un inhibiteur spécifique de la caspase-3 présentent un taux de particules hypodiploïdes radioinduites bien inférieur à celui des contrôles et une diminution drastique de la fragmentation internucléosomale de l'ADN. Toutefois, ni l'externalisation des phospholipides anioniques, autre marqueur spécifique de l'apoptose, ni la viabilité ne sont affectées.

  19. L'ethique de l'environnement comme dimension transversale de l'education en sciences et en technologies: Proposition d'un modele educationnel

    NASA Astrophysics Data System (ADS)

    Chavez, Milagros

    Cette these presente la trajectoire et les resultats d'une recherche dont l'objectif global est de developper un modele educationnel integrant l'ethique de l'environnement comme dimension transversale de l'education en sciences et en technologies. Face au paradigme positiviste toujours dominant dans l'enseignement des sciences, il a semble utile d'ouvrir un espace de reflexion et de proposer, sous forme d'un modele formel, une orientation pedagogique qui soit plus en resonance avec quelques-unes des preoccupations fondamentales de notre epoque: en particulier celle qui concerne la relation de humain avec son environnement et plus specifiquement, le role de la science dans le faconnement d'une telle relation, par sa contribution a la transformation des conditions de vie, au point de compromettre les equilibres naturels. En fonction de cette problematique generale, les objectifs de la recherche sont les suivants: (1) definir les elements paradigmatiques, theoriques et axiologiques du modele educationnel a construire et (2) definir ses composantes strategiques. De caractere theorico-speculatif, cette recherche a adopte la demarche de l'anasynthese, en la situant dans la perspective critique de la recherche en education. Le cadre theorique de cette these s'est construit autour de quatre concepts pivots: modele educationnel, education en sciences et en technologies, transversalite educative et ethique de l'environnement. Ces concepts ont ete clarifies a partir d'un corpus textuel, puis, sur cette base, des choix theoriques ont ete faits, a partir desquels un prototype du modele a ete elabore. Ce prototype a ensuite ete soumis a une double validation (par des experts et par une mise a l'essai), dans le but d'y apporter des ameliorations et, a partir de la, de construire un modele optimal. Ce dernier comporte deux dimensions: theorico-axiologique et strategique. La premiere s'appuie sur une conception de l'education en sciences et en technologies comme appropriation d

  20. Première expérience de l'utilisation du Misoprostol comme soin après avortement (SAA) à Libreville, Gabon

    PubMed Central

    Mayi-Tsonga, Sosthène; Minkobame, Ulysse; Mbila, Arielle; Assoumou, Pamphile; Diop, Ayisha; Winikoff, Beverly

    2014-01-01

    Introduction Une étude a été menée afin de déterminer le taux d'acceptabilité de 400µg de misoprostol par voie sublinguale comme traitement de première intention de l'avortement incomplet et de préciser le taux d'avortement complet ou vacuité utérine. Méthodes Les femmes éligibles avaient un diagnostic clinique d'avortement incomplet avec une taille utérine inférieure à celle d'un utérus de 12 semaines d'aménorrhées (SA). Chacune a reçu 400µg de misoprostol par voie sublinguale. Les femmes ont été revues après une semaine. A J7, celles qui n'avaient pas complètement expulsé ont eu le choix entre une nouvelle consultation de suivi à J14 et la pratique d'une évacuation chirurgicale immédiate. Résultats 145 patientes ont été éligibles et ont toutes accepté la méthode (100%). L’âge moyen était de 25,9 ± 6 ans. A J7, 120 patientes étaient guéries (85,7%). A J14, le taux de réussitea été de 95,7% soit 134 patientes guéries. Les patientes guéries ont déclaré être très satisfaites (57,5%), satisfaites (41,8%) et insatisfaite (0,7%). Au total,128 femmes (95,5%) ont dit être prêtes à utiliser de nouveau le misoprostol comme méthode d’évacuation utérine en cas d'avortement incomplet. Conclusion L’étude démontre que le 400µg misoprostol par voie sublinguale nous permet de prendre en charge d'une manière adéquate l'avortement incomplet surtout dans les pays à faible ressource et notamment dans les structures sanitaires de première ligne ou éloignées. PMID:25469194

  1. "Cuz They Care about the People Who Goes There": The Multiple Roles of a Community-Based Youth Center in Providing "Youth (Comm)Unity" for Low-Income Chinese American Youth

    ERIC Educational Resources Information Center

    Wong, Nga-Wing Anjela

    2010-01-01

    This article will explore the role of "CYC," a community-based youth center, in providing a sense of what I call "Youth (Comm)Unity" for Chinese American youth from low-income immigrant families. While CYC combines the youths' home and school worlds, it is also distinct from these worlds by forming a new and hybrid culture/space. In doing so, I…

  2. A comme (A as in) ...

    ERIC Educational Resources Information Center

    Huber, Herbert; And Others

    1979-01-01

    This section discusses ways to teach the use of "ne...que,""seulement," and "seul,"; describes a "find the mistakes" game that can be used to stimulate discussion; suggests the telegram as a pedagogical tool; and provides novel ideas for using commercial advertising for language exercises. (AM)

  3. A comme... (A as in...).

    ERIC Educational Resources Information Center

    Helouber, J. A.; And Others

    1979-01-01

    The four parts in this section present: (1) an advertisement based on the literary style of Emile Zola; (2) exercises designed to practice expressions of similarity and difference; (3) the transcript of a discussion on the problem of swamps; and (4) variations on the shopkeeper-customer dialogue. (AM)

  4. A comme... (A as in...).

    ERIC Educational Resources Information Center

    Lamy, Yves; And Others

    1980-01-01

    Four essays present suggestions for (1) using sensational news articles; (2) exercising students' understanding of polysemes; (3) using Telex messages; and (4) using postage stamps in a series, in the French classroom. (AM)

  5. A Comme... (A as in...)

    ERIC Educational Resources Information Center

    Francais dans le Monde, 1976

    1976-01-01

    This feature consists of instructional materials to be used for vocabulary development and language use in French instruction. Specific areas covered include advertising, travel, and journalism. (Text is in French.) (CLK)

  6. Les reseaux de politique publique comme facteur d'influence du choix des instruments de politique energetique canadienne a des fins environnementales de 1993 a nos jours

    NASA Astrophysics Data System (ADS)

    Fathy El Dessouky, Naglaa

    'elaboration des politiques energetiques et environnementales canadiennes. Qui plus est, le fait de recourir a ce cadre d'analyse permet d'approcher autrement le sujet etudie en essayant de comprendre et d'expliquer non seulement les interactions entre les differents acteurs cibles, mais aussi le dynamisme et l'evolution de ces relations dans leur duree, comme etant des determinants primordiaux en matiere de selection des instruments des politiques.

  7. Parallel solution of the time-dependent Ginzburg-Landau equations and other experiences using BlockComm-Chameleon and PCN on the IBM SP, Intel iPSC/860, and clusters of workstations

    SciTech Connect

    Coskun, E.; Kwong, M.K.

    1995-09-01

    Time-dependent Ginzburg-Landau (TDGL) equations are considered for modeling a thin-film finite size superconductor placed under magnetic field. The problem then leads to the use of so-called natural boundary conditions. Computational domain is partitioned into subdomains and bond variables are used in obtaining the corresponding discrete system of equations. An efficient time-differencing method based on the Forward Euler method is developed. Finally, a variable strength magnetic field resulting in a vortex motion in Type II High {Tc} superconducting films is introduced. The authors tackled the problem using two different state-of-the-art parallel computing tools: BlockComm/Chameleon and PCN. They had access to two high-performance distributed memory supercomputers: the Intel iPSC/860 and IBM SP1. They also tested the codes using, as a parallel computing environment, a cluster of Sun Sparc workstations.

  8. LE COMPLEXE MEMBRANAIRE SUPERFICIEL ET SON EVOLUTION LORS DE L'ELABORATION DES INDIVIDUS-FILS CHEZ TOXOPLASMA GONDII

    PubMed Central

    Vivier, Emile; Petitprez, André

    1969-01-01

    The parasitic protozoan Toxoplasma gondii has been examined with the electron microscope in order to study the fine structure and the formation of the membranes surrounding the cell. The study of the ultrastructure of the membranes covering the parasite shows the existence of a three-membraned complex. Only the outer membrane is considered to be the plasma membrane; the two membranes below it form an inseparable whole of changeable molecular architecture (modifications in appearance depending on the methods of fixation, local differentiation). During reproduction, which takes place by fission or more often by endogeny, the membranes of the daughter individuals are formed from the membranes of the parent. At first the middle and inner membranes of the parent extend, separating the cytoplasm of the daughter cells from that of the parent. The three-membrane complex of the endozoites is completed at the time of their liberation; the external membrane of the parent covers the leaving endozoites; thus, the plasma membrane of the daughter cells derives also from that of the parent. These findings on the origin and role of limiting membranes during reproduction differ entirely from those described so far for other cells. PMID:5344151

  9. A Comme....("A" as in....).

    ERIC Educational Resources Information Center

    Huber, Herbert; And Others

    1981-01-01

    Contains four articles concerning: the semantic opposition "Intense-Intesif"; vocabulary enrichment based on authentic documents; descriptions of personal characteristics and group activities; word-games promoting linguistic creativity; and various aspects of the expressions of quantity. (MES)

  10. Le changement comme tradition dans la recherche et la formation a la recherche en biotechnologie et en peripherie Etude de cas en sciences de la sante, sciences naturelles et genie

    NASA Astrophysics Data System (ADS)

    Bourque, Claude Julie

    luttes universitaires que scientifiques, concentrees sur la negociation du capital scientifique, symbolique et economique en jeu dans la formation doctorale, dans les carrieres auxquelles elle mene, et dans les qualites du titre de Ph.D. Au final, la confusion entre des logiques opposees peut etre reduite en reinterpretant le changement comme tradition du champ scientifique. Mots-cles Sociologie, education, enseignement superieur, science et technologie, biotechnologie, formation doctorale, champ scientifique, reseaux sociaux

  11. Radiation-induced degradation of DNA bases

    NASA Astrophysics Data System (ADS)

    Douki, T.; Delatour, T.; Martini, R.; Cadet, J.

    1999-01-01

    Radio-induced degradation of DNA involves radical processes. A series of lesions among the major bases degradation products has been measured in isolated DNA exposed to gamma radiation in aerated aqueous solution. Degradation can be accounted for by the formation of hydroxyl radicals upon radiolysis of water (indirect effect). The four bases are degraded in high yield. Direct effect has been mimicked by photo-induced electron abstraction from the bases producing their radical cation. Quantification of the modified bases showed that guanine is the preferential target. This can be explained by its lower oxidation potential and charge transfer phenomena. La décomposition radio-induite de l'ADN fait intervenir des processus radicalaires. Une série de lésions choisies parmi les produits majeurs de dégradation des bases a été mesurée dans de l'ADN isolé exposé au rayonnement en solution aqueuse aérée. Les modifications sont alors dues aux radicaux hydroxyles produits par la radiolyse de l'eau (effet indirect) et les quatre bases sont efficacement dégradées. L'arrachement d'électrons aux bases par photosensibilisation pour produire leur radical cation, a été utilisé comme modèle de l'effet direct. La quantification des bases modifiées montre que la guanine est préférentiellement dégradée. Cette observation peut s'expliquer par le plus faible potentiel d'oxydation de cette base ainsi que par les phénomènes de transfert de charge vers les guanines.

  12. The Image of Public Relations in Mass Comm Texts.

    ERIC Educational Resources Information Center

    Cline, Carolyn

    1982-01-01

    Compared public relations sections in 12 introductory mass communication texts and found a confusion about the relationship of advertising and public relations, a lack of historical background, and an antipublic relations stance. Journal available from Communication Research Associates, 7100 Baltimore Blvd., Suite 500, College Park, MD 20740; sc…

  13. Utilisation de l'essai comete et du biomarqueur gamma-H2AX pour detecter les dommages induits a l'ADN cellulaire par le 5-bromodeoxyuridine post-irradiation

    NASA Astrophysics Data System (ADS)

    La Madeleine, Carole

    Ce memoire est presente a la Faculte de medecine et des sciences de la sante de l'Universite de Sherbrooke en vue de l'obtention du grade de maitre es sciences (M.Sc.) en radiobiologie (2009). Un jury a revise les informations contenues dans ce memoire. Il etait compose de professeurs de la Faculte de medecine et des sciences de la sante soit : Darel Hunting PhD, directeur de recherche (departement de medecine nucleaire et radiobiologie), Leon Sanche PhD, directeur de recherche (departement de medecine nucleaire et radiobiologie), Richard Wagner PhD, membre du programme (departement de medecine nucleaire et radiobiologie) et Guylain Boissonneault PhD, membre exterieur au programme (departement de biochimie). Le 5-bromodeoxyuridine (BrdU), un analogue halogene de la thymidine reconnu depuis les annees 60 comme etant un excellent radiosensibilisateur. L'hypothese la plus repandue au sujet de l'effet radio sensibilisant du BrdU est qu'il augmente le nombre de cassures simple et double brin lorsqu'il est incorpore dans l'ADN de la cellule et expose aux radiations ionisantes. Toutefois, de nouvelles recherches semblent remettre en question les observations precedentes. Ces dernieres etudes ont confirme que le BrdU est un bon radiosensibilisateur, car il augmente les dommages radio-induits dans l'ADN. Mais, c'est en etant incorpore dans une region simple brin que le BrdU radiosensibilise l'ADN. Ces recherches ont egalement revele pour la premiere fois un nouveau type de dommages produits lors de l'irradiation de l'ADN contenant du BrdU : les dimeres interbrins. Le but de ces travaux de recherche est de determiner si la presence de bromodeoxyuridine dans l'ADN augmente l'induction de bris simple et / ou double brin chez les cellules irradiees en utilisant de nouvelles techniques plus sensibles et specifiques que celles utilisees auparavant. Pour ce faire, les essais cometes et la detection des foci H2AX phosphorylee pourraient permettre d'etablir les effets engendres par

  14. A Dozen Years after Open Source's 1998 Birth, It's Time for "OpenTechComm"

    ERIC Educational Resources Information Center

    Still, Brian

    2010-01-01

    2008 marked the 10-year Anniversary of the Open Source movement, which has had a substantial impact on not only software production and adoption, but also on the sharing and distribution of information. Technical communication as a discipline has taken some advantage of the movement or its derivative software, but this article argues not as much…

  15. C.N.R. v. Cdn. Human Rights Comm., 25 June 1987.

    PubMed

    1987-01-01

    The complainant women employees appealed a lower court ruling that, although they had been discriminated against in employment by their employer, the creation of an affirmative action program setting a percentage of women to be hired was not an appropriate remedy under the Canadian Human Rights Act. The Court reversed this ruling. It held a) that the Act was to be given a fair, large, and liberal interpretation; b) that remedies under the Act were not limited at the prevention of future discrimination, but could be used as a remedy for past practices; c) that in not requiring proof of intent the Act was clearly designed to deal with systematic discrimination; and d) that systematic discrimination required systematic remedies, including specific hiring goals. The Court also rejected an appeal of the employer that there was not sufficient evidence to support a finding of discrimination. PMID:12346627

  16. Comm for Small Sats: The Lunar Atmosphere and Dust Environment Explorer (LADEE) Communications Subsystem

    NASA Technical Reports Server (NTRS)

    Kuroda, Vanessa M.; Allard, Mark R.; Lewis, Brian; Lindsay, Michael

    2014-01-01

    September 6, 2013 through April 21, 2014 marked the mission lifecycle of the highly successful LADEE (Lunar Atmosphere and Dust Environment Explorer) mission that orbited the moon to gather detailed information about the thin lunar atmosphere. This paper will address the development, risks, and lessons learned regarding the specification, selection, and deployment of LADEE's unique Radio Frequency based communications subsystem and supporting tools. This includes the Electronic Ground Support Equipment (EGSE), test regimes, and RF dynamic link analysis environment developed to meet mission requirements for small, flexible, low cost, high performance, fast turnaround, and reusable spacecraft communication capabilities with easy and reliable application to future similar low cost small satellite missions over widely varying needs for communications and communications system complexity. LADEE communication subsystem key components, architecture, and mission performance will be reviewed toward applicability for future mission planning, design, and utilization.

  17. Use of Data Comm by Flight Crew to Conduct Interval Management Operations to Parallel Dependent Runways

    NASA Technical Reports Server (NTRS)

    Baxley, Brian T.; Hubbs, Clay; Shay, Rick; Karanian, James

    2011-01-01

    The Interval Management (IM) concept is being developed as a method to maintain or increase high traffic density airport arrival throughput while allowing aircraft to conduct near idle thrust descents. The Interval Management with Spacing to Parallel Dependent Runways (IMSPiDR1) experiment at NASA Langley Research Center used 24 commercial pilots to examine IM procedures to conduct parallel dependent runway arrival operations while maintaining safe but efficient intervals behind the preceding aircraft. The use of IM procedures during these operations requires a lengthy and complex clearance from Air Traffic Control (ATC) to the participating aircraft, thereby making the use of Controller Pilot Data Link Communications (CPDLC) highly desirable as the communication method. The use of CPDLC reduces the need for voice transmissions between controllers and flight crew, and enables automated transfer of IM clearance elements into flight management systems or other aircraft avionics. The result is reduced crew workload and an increase in the efficiency of crew procedures. This paper focuses on the subset of data collected related to the use of CPDLC for IM operations into a busy airport. Overall, the experiment and results were very successful, with the mean time under 43 seconds for the flight crew to load the clearance into the IM spacing tool, review the calculated speed, and respond to ATC. An overall mean rating of Moderately Agree was given when the crews were asked if the use of CPDLC was operationally acceptable as simulated in this experiment. Approximately half of the flight crew reported the use of CPDLC below 10,000 for IM operations was unacceptable, with 83% reporting below 5000 was unacceptable. Also described are proposed modifications to the IM operations that may reduce CPDLC Respond time to less than 30 seconds and should significantly reduce the complexity of crew procedures, as well as follow-on research issues for operational use of CPDLC during IM operations.

  18. Learning to Liaise and Elide "Comme il Faut": Evidence from Bilingual Children

    ERIC Educational Resources Information Center

    Nicoladis, Elena; Paradis, Johanne

    2011-01-01

    Liaison and elision in French are phonological phenomena that apply across word boundaries. French-speaking children make errors in contexts where liaison/elision typically occurs in adult speech. In this study, we asked if acquisition of French liaison/elision can be explained in a constructivist framework. We tested if children's liaison/elision…

  19. Enfants autochtones et apprentissage: la corporalité comme langage en Amérique du Sud tropicale

    NASA Astrophysics Data System (ADS)

    da Silva, Aracy Lopes

    1999-05-01

    In this article on the cultural context of children's learning processes among the indigenous peoples of tropical South America, the author aims to show how in these cultures the human body offers a language and a mechanism central to the process of production, elaboraton and transmission of knowledge, skills and emotions. She works from the assumption that the construction of a child's identity is a process which takes place in the body, creating a synthesis of social, cosmological, psychological, emotional and cognitive meanings. In constructing an ethnography of the Akwe~-Xavante and Akwe~-Xerente peoples of central Brazil, the author refers to recent anthropological debates on the cosmology and outlook of the indigenous peoples of this region, as well as to the literature of the new discipline known as "anthropology of the child".

  20. De la variation de l'etayage logopedique comme outil therapeutique (Variation of Speech Therapy Scaffolding as a Therapeutic Tool).

    ERIC Educational Resources Information Center

    Gaillard, Douchka

    1998-01-01

    Drawing on research on techniques for scaffolding in speech therapy for victims of Alzheimer's Disease, some considerations in determining appropriate scaffolding in speech therapist-client interactions at four levels of interaction (initial, those involving early language activities, discourse interactions, and turn-taking) are discussed.…

  1. Commande optimale minimisant la consommation d'energie d'un drone utilise comme relai de communication

    NASA Astrophysics Data System (ADS)

    Mechirgui, Monia

    The purpose of this project is to implement an optimal control regulator, particularly the linear quadratic regulator in order to control the position of an unmanned aerial vehicle known as a quadrotor. This type of UAV has a symmetrical and simple structure. Thus, its control is relatively easy compared to conventional helicopters. Optimal control can be proven to be an ideal controller to reconcile between the tracking performance and energy consumption. In practice, the linearity requirements are not met, but some elaborations of the linear quadratic regulator have been used in many nonlinear applications with good results. The linear quadratic controller used in this thesis is presented in two forms: simple and adapted to the state of charge of the battery. Based on the traditional structure of the linear quadratic regulator, we introduced a new criterion which relies on the state of charge of the battery, in order to optimize energy consumption. This command is intended to be used to monitor and maintain the desired trajectory during several maneuvers while minimizing energy consumption. Both simple and adapted, linear quadratic controller are implemented in Simulink in discrete time. The model simulates the dynamics and control of a quadrotor. Performance and stability of the system are analyzed with several tests, from the simply hover to the complex trajectories in closed loop.

  2. L'apprentissage d'une langue etrangere comme ouverture culturelle (Second Language Learning as a Cultural Opportunity).

    ERIC Educational Resources Information Center

    LeBrun, Monique

    It has been suggested that the learning of a second language is not only a practical matter, as is commonly emphasized in discussion about language teaching, but is equally an experience of cultural initiation, particularly through the appreciation of literary texts in that language. The first part of this paper reviews educators' ideas about…

  3. Brûlure chez l’épileptique: brûlure pas comme les autres

    PubMed Central

    Boukind, S.; Elatiqi, O.K.; Dlimi, M.; Elamrani, D.; Benchamkha, Y.; Ettalbi, S.

    2015-01-01

    Summary L’association brûlure et épilepsie est une constatation fréquente au Maroc. Ces brûlures, souvent itératives, touchent le plus souvent des femmes jeunes de milieu rural. L’accident survient habituellement au domicile, le plus souvent dans la cuisine à la suite d’une chute sur un moyen de cuisson posé au sol. Elles peuvent être inaugurales de la maladie mais surviennent plus souvent chez des patients connus mais au traitement mal suivi. Les conséquences de ces brûlures, toujours profondes, sont souvent dramatiques en termes de séquelles, chez des patients ayant déjà une insertion sociale rendue difficile par l’épilepsie. La prise en charge doit être multidisciplinaire et concerner à la fois la brûlures et l’épilepsie. Des mesures de prévention simples, visant à équilibrer l’épilepsie et éviter au patient de se trouver seul à proximité d’une source de chaleur, doivent être mises en place. PMID:27252613

  4. The Mass Comm Type: Student Personality Traits, Motivations, and the Choice between News and Strategic Communication Majors

    ERIC Educational Resources Information Center

    Crawford, Elizabeth Crisp; Fudge, Julie; Hubbard, Glenn T.; Filak, Vincent F.

    2013-01-01

    A study of news media and strategic communication majors (n = 273) revealed differences in regard to personality indices and impetuses for selecting to pursue degrees. Showing overall agreement in the importance of openness, agreeableness, and conscientiousness, strategic communication students were significantly higher in their ratings of…

  5. La convergence du flux de vapeur d'eau et son potentiel comme variable hydrologique de surface

    NASA Astrophysics Data System (ADS)

    Cardin-Ouellette, Sabrina

    Hydrology is often oriented on the terrestrial branch of the hydrologic cycle. In a watershed, the amount of water vapor can change due to atmospheric transport. The horizontal convergence of the moisture flux (C) constitutes the net input of water vapor in a given region. For long time periods and on a watershed's spatial scale, the horizontal convergence of the moisture flux should equal the water runoff of the watershed region. Keeping track of C should be an interesting way of increasing the efficiency of hydrological models. The global objective of this project is to quantify the hydrological cycle in the Canadian Regional Climate Model (CRCM) to evaluate if the horizontal convergence of the moisture flux can be used as an informative variable in hydrological models. The CRCM is useful to model complex hydrologic phenomena at regional scale and calculates components of the cycle that are difficult to obtain in the field. The results show that convergence is equal to the runoff on the climatic temporal scale. The temporal annual series also shows large correlation between the runoff and the convergence (r >0.8). On the monthly time scale, the relation is not as obvious because the atmospheric and terrestrial reservoirs also hold transiting water. During winter, the monthly convergence in the Nordic watersheds is approximately equal to the variation of the snow cover. The error in the simulated hydrological balance varies between 0 and 10% on the climatic time scale. This is much less than the error obtained by similar studies using reanalyses. At this scale, the term of error is related to the semi-Lagrangian computational scheme and possibly to the correction of the hydrological balance integrated in the MRCC. Increasing error on the monthly (0 to 30%) and daily (0 to 100%) time scales is due to a 6 hours temporal gap between the averaged variables and instantaneous variables in the recording scheme of the MRCC. Keywords: Hydrologic cycle, Moisture flux convergence, Canadian regional climate model.

  6. The 'CommTech' Methodology: A Demand-Driven Approach to Efficient, Productive and Measurable Technology Transfer

    NASA Technical Reports Server (NTRS)

    Horsham, Gray A. P.

    1998-01-01

    Market research sources were used to initially gather primary technological problems and needs data from non-aerospace companies in targeted industry sectors. The company-supplied information served as input data to activate or start-up an internal, phased match-making process. This process was based on technical-level relationship exploration followed by business-level agreement negotiations, and culminated with project management and execution. Space Act Agreements represented near-term outputs. Company product or process commercialization derived from Lewis support and measurable economic effects represented far-term outputs.

  7. Enfants Autochtones et Apprentissage: la Corporalite comme Langage en Amerique du Sud Tropicale. (Indigenous Children and Learning: the Body's Language in Tropical South America.)

    ERIC Educational Resources Information Center

    da Silva, Aracy Lopes

    1999-01-01

    Shows how, among the cultures of the indigenous peoples of tropical South America, the human body offers a language and mechanism central to the process of production, elaboration, and transmission, of knowledge, skills, and emotions. Discusses recent anthropological debates and describes a new discipline known as "anthropology of the child."…

  8. Le "Talk-Show" comme form de la communication de Masse (The Talk-Show as a Form of Mass Communication).

    ERIC Educational Resources Information Center

    Mininni, Guiseppe

    1990-01-01

    Discusses the dynamics of human interaction as manifested through the confines of the talk-show, and explores how the talk-show medium defines and manipulates the language "event" (communicative activity) through its own set of paralinguistic rules and theatrical techniques. (WS)

  9. Le pneumothorax spontané comme une manifestation évolutive de la polyarthrite rhumatoide: à propos d'une observation clinique et revue de la litterature

    PubMed Central

    Gaye, Magaye; Ndiaye, Assane; Fall, Mouhamed Lamine; Diatta, Souleymane; Dieng, Papa Adama; Ba, Papa Salmane; Ciss, Amadou Gabriel; Ndiaye, Mouhamadou

    2015-01-01

    La polyarthrite rhumatoïde est une maladie systémique inflammatoire caractérisée par une destruction des synoviales articulaires et des lésions systémiques extra articulaires. Les nodules pulmonaires font partie de ces dernières. Leur évolution peut aboutir à un pneumothorax spontané. Nous rapportons le cas d'un adulte jeune au long passé de polyarthrite rhumatoïde qui a présenté deux épisodes de pneumothorax spontané. Il était admis dans notre service, en urgence, pour un pneumothorax droit spontané et massif sur terrain de polyarthrite rhumatoïde au stade de déformation. Il était sous méthotrexate. La radiographie standard du thorax et la tomodensitométrie montraient un décollement pleural complet droit, des nodules et des images excavées sur les deux champs pulmonaires. Il a bénéficié d'un drainage thoracique aspiratif permettant une bonne ré-expansion pulmonaire. Le pneumothorax spontané constitue une manifestation rare des lésions pulmonaire de la polyarthrite rhumatoïde. Il s'agit le plus souvent d'une manifestation évolutive de la maladie mais aussi une circonstance de découverte de cette dernière. L'implication des immunosuppresseurs reste à être prouvée. Ainsi la polyarthrite rhumatoïde doit être considérée dans la recherche étiologique d'un pneumothorax spontané. PMID:26977228

  10. Corrigendum to "Imaginary time propagation code for large-scale two-dimensional eigenvalue problems in magnetic fields" [Comput. Phys. Comm. 184(3) (2013) 769-776

    NASA Astrophysics Data System (ADS)

    Luukko, P. J. J.; Räsänen, E.

    2016-01-01

    Our original publication [1] contains an error in the terminology regarding different orthonormalization algorithms. Section 2.2 of the original publication describes the orthonormalization algorithm we have used, which is the subspace orthonormalization algorithm (SO). This algorithm has also been used in previous imaginary time propagation implementations, and shown to cause faster convergence compared to a traditional Gram-Schmidt process [2,3].

  11. Les mécanismes chimiques de la radiostérilisation de médicaments solides

    NASA Astrophysics Data System (ADS)

    Tilquin, B.; Crucq, A.-S.

    1999-01-01

    This paper is devoted to the chemical mechanisms associated with the radiosterilization of solid pharmaceuticals. Microbial tests and potency determinations proved the feasibility of the sterilization process. The literature about the radio-induced chemistry is very poor. Nevertheless, these are essential for the understanding of the process. This article deals with the actual hypotheses and the capability to predict the radio-induced degradation due to the radiosterilization process. Cet article pose la question des mécanismes chimiques associés à la radiostérilisation de principes actifs solides. La faisabilité de ce mode de stérilisation a déjà été démontrée pour plusieurs préparations pharmaceutiques. Après traitement ionisant, le médicament est exempt de microorganismes vivants et son efficacité n'est pas altérée. Peu d'informations sont disponibles sur les mécanismes chimiques radio-induits. Ceux-ci sont néanmoins essentiels pour la compréhension et la maîtrise du procédé. Cet article décrit les hypothèses qui peuvent être actuellement avancées ainsi que la capacité prévisionnelle en phase solide de l'importance des transformations chimiques associées à la radiostérilisation.

  12. Comment on “HAM solutions for boundary layer flow in the region of the stagnation point towards a stretching sheet” [Comm. Nonlinear Sci. Numer. Simul. 15 (2010) 475-481

    NASA Astrophysics Data System (ADS)

    Sajid, M.; Ali, N.; Ahmad, I.; Abbas, Z.; Javed, T.

    2011-03-01

    Recently, Nadeem et al. [1] discussed the HAM solution for the boundary layer flow in the region of the stagnation point towards a stretching sheet. Crucial flaws in [1] are pointed out in this comment.

  13. Le "Futur Anterieur" comme temps du passe: Remarques sur un emploi particulier frequent du "futur anterieur" en francais. (The "Futur Anterieur" as Past Tense: Remarks on a Particular Frequent Use of the "Futur Anterieur" in French).

    ERIC Educational Resources Information Center

    Steinmeyer, Georg

    1987-01-01

    Explains how the "futur anterieur" is often used to indicate past time in French grammar. Using authentic evidence from a news magazine, some hypotheses on the conditions of use of the "futur anterieur" are suggested. Criteria for distinguishing past tense functions from modal functions are also presented. (TR)

  14. Couplage des équations de transfert de masse et des lois d'interactions solution-solide par l'utilisation des lanthanides comme traceurs — Approche expérimentale

    NASA Astrophysics Data System (ADS)

    Bigot, S.; Treuil, M.; Dumonceau, J.; Fromage, F.

    1984-02-01

    In underground flow tracing studies, the estimation of the nature and the importance of interactions undergone by the substance used very often constitutes an obstacle to good modeling of mass-transfer processes in solution. We propose a method to quantify these phenomena by the use of lanthanides as tracers. For this study, we set up an analytical methodology adapted to routine measurements. The quality of five lanthanides as indicators has been examined. We have demonstrated the formation, by substitution, of a carbonate complex which is extremely stable in the natural environment. The field experiments carried out demonstrated the efficiency of those tracers and confirmed their great stability. Tracer recovery graphs show that, in accord with our hypothesis, convection and dispersion are identical for all the lanthanide elements. Moreover, we have established a direct relation between their fixing rate on earth materials and the value of their stability constants. Thus, we demonstrate the possibility of correlative multitracing, with known and quantifiable interelement relations.

  15. Les sondages électromagnétiques temporels comme outil de reconnaissance du gisement phosphaté de Sidi Chennane (Maroc) : apport à la résolution d'un problème d'exploitation

    NASA Astrophysics Data System (ADS)

    Kchikach, Azzouz; Andrieux, Pierre; Jaffal, Mohammed; Amrhar, Mostafa; Mchichi, Mohammed; Boya, Baadi; Amaghzaz, Mbarek; Veyrieras, Thierry; Iqizou, Khadija

    2006-05-01

    Exploitation of the phosphatic layers in Sidi Chennane deposit (Morocco) collides frequently with problems bound to the existence, in the phosphatic series, of sterile bodies qualified as derangements. Our study shows that these bodies, masked by the Quaternary cover can be mapped using the Time-Domain ElectroMagnetic Soundings method (TDEM). It is based on the acquisition and the interpretation of a series of tests carried out above a visible derangement in an old trench of exploitation and on 2500 TDEM soundings carried out in a virgin area of the deposit. The article concerns to the analysis of the results and of the proceeding for a possible large geophysics survey. To cite this article: A. Kchikach et al., C. R. Geoscience 338 (2006).

  16. Impact de la pollution industrielle sur la zone côtière du Jorf Lasar (océan Atlantique marocain): la moule comme indicateur de la contamination métallique

    NASA Astrophysics Data System (ADS)

    Kaimoussi, Aziz; Chafik, Abdelghani; Mouzdahir, Abdelkrim; Bakkas, Salem

    2001-09-01

    The present study characterizes the effluents of the 'Maroc Phosphore' factories III and IV (of Jorf Lasfar coastal zone). The results show that the effluent (Cs/l) is very acid, very phosphate-rich, high in suspended matter and calcium-rich. Hydrological parameters indicate an important content of phosphates, especially in the stations located in the South of Cs/l. Tissues of mussel Mytilus galloprovincialis from the Jorf Lasfar zone present high concentrations of Cd and Cu.

  17. Etude de la cinétique de polarisation de concentration en microfiltration du sang en régime transitoire

    NASA Astrophysics Data System (ADS)

    Ding, L. H.; Laurent, J. M.; Jaffrin, M. Y.

    1994-12-01

    150mmHg, the permeate flux hardly changes, which confirms that once concentration polarization is established, the system membrane-polarization layer ceases to behave as a porous medium even with increased resistance. These data can explain the permeate increase observed when pressure and flow pulsations at 1Hz are superimposed on the retentate. La plasmaphérèse par membrane consiste à filtrer le plasma au travers d'une membrane microporeuse sous l'action de la pression transmembranaire. Comme toutes filtrations tangentielles, le flux de filtration augmente linéairement aux faibles pressions transmembranaires, puis atteint un plateau aux fortes pressions à cause du phénomène de polarisation de concentration et du colmatage de la membrane. La polarisation de concentration est due à la formation d'une couche fortement concentrée en soluté au voisinage de la membrane. Le temps de formation de cette couche est rapide, généralement inférieur à une minute. En microfiltration du sang, cette couche est constituée des globules qui forment une seconde membrane réversible qui limite le flux de filtration. Dans ce régime, le flux de perméat devient indépendant de la pression transmembranaire et dépend principalement du taux de cisaillement. Nous avons entrepris une étude de la réponse transitoire d'une membrane à des échelons de pression transmembranaire afin de comprendre la cinétique d'établissement de ces phénomènes. Lorsque l'on passe brusquement d'un régime non polarisé à celui polarisé, le flux de filtration croît jusqu'à un pic en 0,4 à 0,6s dépassant la valeur du plateau de 60 à 80%, puis il revient à sa valeur d'équilibre correspondant au régime de polarisation de concentration en 3 à 4s. Les données expérimentales montrent que la membrane garde une perméabilité originale pendant seulement 0,5s lors d'un changement brusque de pression et que la couche de polarisation de concentration met environ 3 à 4s à s'établir. Quand la

  18. Avant-Propos

    NASA Astrophysics Data System (ADS)

    Ollivier, J.; Farhi, E.; Ferrand, M.; Benoit, M.

    2005-11-01

    solution (D. Lairez), en réflectométrie de neutrons pour l'étude de systèmes des membranes ou de protéines en interaction avec des membranes (G. Fragneto), ainsi qu'en diffraction de fibres appliquée à l'étude de l'ADN (T. Forsyth). - les simulations de dynamique moléculaire constituent une méthode théorique unique pour étudier, au niveau atomique, les mouvements internes des macromolécules biologiques, que ce soit à l'équilibre (G. Kneller, S. Crouzy) ou hors équilibre (B. Gilquin). Les trajectoires de dynamique moléculaire s'étendent aujourd'hui à la centaine de nanosecondes, et peuvent être de ce fait utilisées par certains programmes pour calculer les observables expérimentales fournies par la diffusion de neutrons (G. Kneller, T. Hinsen). - l'ouverture des neutrons à des techniques instrumentales permettant d'approcher, d'une part, des états hors-équilibre par le biais d'études cinétiques couplées à des mélanges rapides pour des études de croissance de phases (I. Grillo) ou de repliement de protéines, d'autre part, des conditions expérimentales extrèmes (hautes-pressions, M. Plazanet), nous ont semblé constituer des émergences prometteuses. À ce titre, une revue sur le repliement des protéines (V. Forge) a précisé l'importance de nombreuses techniques (fluorescence intrinsèque, dichroïsme, infra-rouge, RMN) dans le domaine, tout en permettant d'entrevoir l'intérêt des études par neutrons. - en marge des sessions purement “neutrons”, il nous semblait important de pouvoir présenter des techniques et méthodes souvent reconnues comme très complémentaires des neutrons, en privilégiant un volet “études structurales” et un volet “études dynamiques”. Côté méthodes dynamiques, la RMN (M. Blackledge) a été positionnée comme une technique permettant d'étudier la flexibilité moléculaire sur des echelles de temps plus lentes (ms). Côté méthodes structurales, la bio-cristallographie des RX appliquée à l

  19. 75 FR 4344 - Foreign-Trade Zone 22-Chicago, IL Application for Temporary/Interim Manufacturing Authority LG...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-27

    ... Manufacturing Authority LG Electronics MobileComm USA, Inc. (Cell Phone Kitting and Distribution) Bolingbrook... manufacturing (T/IM) authority within FTZ 22 at the LG Electronics MobileComm USA, Inc. (LGEMU)...

  20. 75 FR 4343 - Foreign-Trade Zone 22-Chicago, IL; Application for Manufacturing Authority; LG Electronics...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-27

    ... Electronics MobileComm USA, Inc. (Cell Phone Kitting and Distribution); Bolingbrook, IL An application has..., grantee of FTZ 22, requesting manufacturing authority on behalf of LG Electronics MobileComm USA,...

  1. The Role of Scientific Communication Skills in Trainees' Intention to Pursue Biomedical Research Careers: A Social Cognitive Analysis.

    PubMed

    Cameron, Carrie; Lee, Hwa Young; Anderson, Cheryl; Byars-Winston, Angela; Baldwin, Constance D; Chang, Shine

    2015-01-01

    Scientific communication (SciComm) skills are indispensable for success in biomedical research, but many trainees may not have fully considered the necessity of regular writing and speaking for research career progression. Our purpose was to investigate the relationship between SciComm skill acquisition and research trainees' intentions to remain in research careers. We used social cognitive career theory (SCCT) to test a model of the relationship of SciComm skills to SciComm-related cognitive variables in explaining career intentions. A sample of 510 graduate students and postdoctoral fellows at major academic health science centers in the Texas Medical Center, Houston, Texas, were surveyed online. Results suggested that interest in performing SciComm tasks, SciComm outcome expectations (SCOEs), and SciComm productivity predicted intention to remain in a research career, while SciComm self-efficacy did not directly predict career intention. SCOEs also predicted interest in performing SciComm tasks. As in other SCCT studies, SciComm self-efficacy predicted SCOEs. We conclude that social cognitive factors of SciComm skill acquisition and SciComm productivity significantly predict biomedical trainees' intentions to pursue research careers whether within or outside academia. While further studies are needed, these findings may lead to evidence-based interventions to help trainees remain in their chosen career paths. PMID:26628562

  2. The Role of Scientific Communication Skills in Trainees’ Intention to Pursue Biomedical Research Careers: A Social Cognitive Analysis

    PubMed Central

    Cameron, Carrie; Lee, Hwa Young; Anderson, Cheryl; Byars-Winston, Angela; Baldwin, Constance D.; Chang, Shine

    2015-01-01

    Scientific communication (SciComm) skills are indispensable for success in biomedical research, but many trainees may not have fully considered the necessity of regular writing and speaking for research career progression. Our purpose was to investigate the relationship between SciComm skill acquisition and research trainees’ intentions to remain in research careers. We used social cognitive career theory (SCCT) to test a model of the relationship of SciComm skills to SciComm-related cognitive variables in explaining career intentions. A sample of 510 graduate students and postdoctoral fellows at major academic health science centers in the Texas Medical Center, Houston, Texas, were surveyed online. Results suggested that interest in performing SciComm tasks, SciComm outcome expectations (SCOEs), and SciComm productivity predicted intention to remain in a research career, while SciComm self-efficacy did not directly predict career intention. SCOEs also predicted interest in performing SciComm tasks. As in other SCCT studies, SciComm self-efficacy predicted SCOEs. We conclude that social cognitive factors of SciComm skill acquisition and SciComm productivity significantly predict biomedical trainees’ intentions to pursue research careers whether within or outside academia. While further studies are needed, these findings may lead to evidence-based interventions to help trainees remain in their chosen career paths. PMID:26628562

  3. Evaluation du potentiel radiosensibilisateur ou radioprotecteur/antioxydant de quelques composes selectionnes par dosimetrie par gel de polyacrylamide et dosimetre de Fricke, et utilisation de la filamentation par impulsion laser infrarouge fenitoseconde comme un nouveau et puissant faisceau pour la radiotherapie du cancer

    NASA Astrophysics Data System (ADS)

    Meesat, Ridthee

    In radiation treatment, a sufficiently high radiation dose must be delivered to the tissue volumes containing the tumor cells while the lowest possible dose should be deposited in surrounding healthy tissue. We developed an original approach that is fast and easy to implement for the early assessment of the efficiency of radiation sensitizers and protectors. In addition, we characterized a new femtosecond laser pulse irradiation technique. We are able to deposit a considerable dose with a very high dose rate inside a well-controlled macroscopic volume without deposition of energy in front or behind the target volume. The radioprotective efficiency was measured by irradiation of the Fricke solution incorporating a compound under study and measuring the corresponding production of ferric ions G(Fe3+). The production of ferric ions is most sensitive to the radical species produced in the radiolysis of water. We studied experimentally and simulated with a full Monte-Carlo computer code the radiation-induced chemistry of Fricke/cystamine solutions. Results clearly indicate that the protective effect of cystamine originates from its radical-capturing ability, which allows this compound to compete with the ferrous ions for the various free radicals - especially ·OH radicals and H· atoms - formed during irradiation of the surrounding water. The sensitizing capacity of radiation sensitizers was measured by irradiation of a polyacrylamide gel (PAG) dosimeter incorporating a compound under study and measuring the corresponding increase in the gradient between spin-spin relaxation rate (R2) and absorbed dose. We measured an irradiation energy-dependent increase in R 2-dose sensitivity for halogenated compounds or a decrease for radioprotectors. Finally, we studied a novel laser irradiation method called "filamentation". We showed that this phenomenon results in an unprecedented deposition of energy and the dose rate thus achieved exceeds by orders of magnitude values previously reported for the most intense clinical radiotherapy systems. Moreover, the length of the dose-free entrance region was adjusted by selecting the duration of femtosecond laser pulses. In addition, we provided evidence that the biological damage caused by this irradiation was similar to other ionizing radiation sources. Keywords: Radiotherapy, radiosensitization, radioprotection, laser, filamentation, dosimetry.

  4. Fiches Pratiques: ...et comme le poeme est violent; droit au concours; la liberte guide nos pas; lexique de didactique les 39 marches (Practical Ideas: ...And How Violent the Poem Is; Right to the Contest; Liberty Guides Us; The Language of Teaching in 39 Steps).

    ERIC Educational Resources Information Center

    Dautry, Claire-Lise; And Others

    1988-01-01

    Four ideas for French language instruction are described, including a class recording of a famous French poem, a contest about the French Revolution, study of the Declaration of the Rights of Man, and a list of 39 definitions forming the basis of instructional language. (MSE)

  5. 75 FR 65656 - In the Matter of: Certain Notebook Computer Products and Components Thereof; Notice of Commission...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-26

    ... complaint filed by Toshiba Corporation of Japan (``Toshiba''). 75 FR 8400. The complaint alleges violations... Wistron InfoComm Technology (America) Corporation of Flower Mound, Texas (collectively, ``Wistron'')...

  6. 32 CFR Appendix C to Part 86 - State Information

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...: 916-739-2786. State of Colorado, Crime Information Center, Colorado Bureau of Investigation, 690.... L. required, name check, COMM: 609-882-2000. State of New Mexico, Department of Public Safety... form, fingerprints required, COMM: 615-741-3241. State of Texas, Texas Crime Records Division,...

  7. 77 FR 3001 - Certain Agricultural Vehicles and Components Thereof Final Determination; Reinstatement of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-20

    ... were of its North American version (``NA'') SPFHs. Bourdeau Bros., Inc. v. Int'l Trade Comm'n, 444 F.3d... vacated and remanded for further proceedings. Deere & Co. v. Int'l Trade Comm'n, 605 F.3d 1350 (Fed....

  8. Ground-Ground Data Communication-Assisted Planning and Coordination: Shorter Verbal Communications

    NASA Technical Reports Server (NTRS)

    Kessell, Angela Mary; Lee, Paul U.; Smith, Nancy M.; Lee, Hwasoo Eric

    2010-01-01

    A human-in-the-loop simulation was conducted to investigate the operational feasibility, technical requirements, and potential improvement in airspace efficiency of adding a Multi-Sector Planner position. A subset of the data from that simulation is analyzed here to determine the impact, if any, of ground-ground data communication (Data Comm) on verbal communication and coordination for multi-sector air traffic management. The results suggest that the use of Data Comm significantly decreases the duration of individual verbal communications. The results also suggest that the use of Data Comm, as instantiated in the current simulation, does not obviate the need for accompanying voice calls.

  9. 75 FR 26838 - Notice of Application for Approval of Discontinuance or Modification of a Railroad Signal System...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-12

    ... Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477) or at http://www.dot..., AVP Engineering -- Signal/Comm/TCO, 1400 Douglas Street, STOP 0910, Omaha, Nebraska 68179. The...

  10. 77 FR 49862 - Santa Cruz and Monterey Bay Railway Company-Assignment of Lease Exemption-Union Pacific Railroad...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-17

    ... Cruz County Regional Transportation Commission (SCCRTC). See Santa Cruz Cnty. Reg'l Transp. Comm'n...-01-P ... milepost 0.433 at the east boundary of Salinas Road, near Watsonville Junction, Cal., to milepost 31.39...

  11. The Next Generation of Space Communications

    NASA Video Gallery

    NASA is looking for the next generation of space communications technology and Laser Comm may be the answer. Optical communications provide higher bandwidth, which allows for faster data flow and e...

  12. Definition of experiments and instruments for a communication/navigation research laboratory. Volume 3: Laboratory descriptions

    NASA Technical Reports Server (NTRS)

    1972-01-01

    The following study objectives are covered: (1) identification of major laboratory equipment; (2) systems and operations analysis in support of the laboratory design; and (3) conceptual design of the comm/nav research laboratory.

  13. WHAT'S THE C IN CBAT

    EPA Science Inventory

    Community Based Environmental Protection (CBEP) has the intention of making environmental protection spring from the needs and values of the community of interest. Real community involvement in protecting the environment requires a process in which the environmental needs of comm...

  14. Clinical systemic lupeol administration for canine oral malignant melanoma

    PubMed Central

    YOKOE, INORU; AZUMA, KAZUO; HATA, KEISHI; MUKAIYAMA, TOSHIYUKI; GOTO, TAKAHIRO; TSUKA, TAKESHI; IMAGAWA, TOMOHIRO; ITOH, NORIHIKO; MURAHATA, YUSUKE; OSAKI, TOMOHIRO; MINAMI, SABURO; OKAMOTO, YOSHIHARU

    2015-01-01

    Canine oral malignant melanoma (COMM) is the most aggressive malignant tumor in dogs. Lupeol is a triterpene extracted from various fruits and vegetables that reportedly inhibits melanoma cell proliferation in vitro and in vivo. In this study, the efficacy of subcutaneous lupeol for spontaneous COMM was evaluated. A total of 11 dogs (3, 5 and 3 dogs diagnosed with clinical stage I, II and III melanoma, respectively) were evaluated. Subcutaneous lupeol (10 mg/kg) was administered postoperatively at various time points to treat these 11 COMM cases. Of the 11 subjects, 7 exhibited no local recurrence 180 days postoperatively and no severe adverse effects were observed in any of the cases. Furthermore, no distant metastasis was observed during the experimental period. Therefore, systemic lupeol may prevent local tumor progression and distant metastasis and may be a novel adjuvant treatment for the treatment of COMM. PMID:25469276

  15. Promoting Community Health Resources: Preferred Communication Strategies

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Background: Community health promotion efforts involve communicating resource information to priority populations. Which communication strategies are most effective is largely unknown for specific populations. Objective: A random-dialed telephone survey was conducted to assess health resource comm...

  16. Robotic Intelligence Kernel: Communications

    SciTech Connect

    Walton, Mike C.

    2009-09-16

    The INL Robotic Intelligence Kernel-Comms is the communication server that transmits information between one or more robots using the RIK and one or more user interfaces. It supports event handling and multiple hardware communication protocols.

  17. PECONIC ESTUARY PROGRAM TIDAL CREEK STUDY

    EPA Science Inventory

    EEA evaluated ten tidal creeks throughout the Peconic Estuary representing a wide range of watershed variables. Primary focus was directed towards the collection and analysis of the macrobenthic invertebrate communities of these ten tidal creeks. Analysis of the macrobenthic comm...

  18. Phytoplankton Communities in Louisiana coastal waters and the continental shelf

    EPA Science Inventory

    Louisiana coastal waters and the adjacent continental shelf receive large freshwater and nutrient inputs from the Mississippi and Atchafalaya Rivers, creating favorable conditions for increased phytoplankton productivity. To examine inshore-offshore patterns in phytoplankton comm...

  19. REFUSE OF FERMENTATION BRINES IN THE CUCUMBER PICKLING INDUSTRY

    EPA Science Inventory

    The project evaluated on a commercial scale the technological and economic feasibility of recycling spent cucumber fermentation brine. Two brine treatment procedures, heat treatment and chemical treatment, were used. The results showed that brine recycling was practical on a comm...

  20. Influence of herbaceous riparian buffers on physical habitat, water chemistry, and stream communities within channelized agricultural headwater streams

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Herbaceous riparian buffers are a widely used agricultural conservation practice in the United States for reducing nutrient, pesticide, and sediment loadings in agricultural streams. The ecological impacts of herbaceous riparian buffers on the channelized agricultural headwater streams that are comm...

  1. Implementation of a computer-based test generator to evaluate health professions continuing education.

    PubMed

    Evans, S

    1984-04-01

    A variety of artificial-intelligence-based expert medical systems have been adapted to evaluate a learner's performance in the information areas in which the systems are expert. This paper describes a similar adaptation of a computer-based health sciences tutor (called the COMMES system). The Evaluation Consultant system to be described adapts the COMMES system to become a test generator. This computer-based consultant generates tests entirely on its own, covering programs of study that the COMMES system previously constructed to satisfy a user's identified needs. A health professional is awarded continuing education credits after (1) finishing a study unit constructed by COMMES and (2) completing successfully a test created by the Evaluation Consultant. This system is being implemented in several test sites and has significant advantages for the support of continuing education, especially in rural or isolated areas. PMID:6376676

  2. 77 FR 8897 - Notice of Receipt of an Amended Complaint; Solicitation of Comments Relating to the Public Interest

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-15

    ... South Korea; LG Electronics U.S.A., Inc. of NJ; LG Electronics MobileComm U.S.A. Inc. of CA; Apple Inc... conditions in the United States economy, the production of like or directly competitive articles in...

  3. Community Renewable Energy Deployment Provides Replicable Examples of Clean Energy Projects (Fact Sheet)

    SciTech Connect

    Not Available

    2012-09-01

    This fact sheet describes the U.S. Department of Energy's Community Renewable Energy Deployment (CommRE) program, which is a more than $20 million effort funded through the American Recovery and Reinvestment Act of 2009, to promote investment in clean energy solutions and provide real-life examples for other local governments, campuses, and small utilities to replicate. Five community-based renewable energy projects received funding from DOE through the CommRE and their progress is detailed.

  4. Improvement of turkey breast meat quality and cooked gel functionality using hot-boning, quarter sectioning, crust-freeze-air-chilling and cold-batter-mincing technologies.

    PubMed

    Lee, H C; Erasmus, M A; Swanson, J C; Hong, H G; Kang, I

    2016-01-01

    The effect of rapid carcass chilling on breast meat quality was evaluated using commercial (COMM) and random-bred (RB) turkeys. Immediately after slaughter, 48 turkeys from COMM or RB line were randomly subjected to one of four chilling methods: 1) water-immersion chilling (WIC) of the carcasses at 0°C ice slurry, 2) WIC after temperature abuse (TA) of the carcasses at 40°C for 30 min (TA-WIC), 3) hot-boning, quarter sectioning, and crust-freeze-air-chilling (HB-(1)/4CFAC) of breast fillets at -12°C, and 4) HB-(1)/4CFAC of fillets after TA of carcasses (TA-HB-(1)/4CFAC). The TA increased carcass and fillet temperatures by ∼1.3 and ∼4.1°C, respectively, regardless of turkey line, whereas HB-(1)/4CFAC of fillets required 28 and 33% of carcass chilling time for COMM and RB, respectively. During chilling, COMM breast pH rapidly reduced from 6.04 to 5.82, resulting in a significantly lower pH than RB after chilling (P < 0.05), whereas COMM R-value sharply increased from 1.17 to 1.43, causing no difference from RB (P > 0.05). Significantly higher L* value and cooking yield (P < 0.05) were seen in the samples of TA and WIC than those of no TA and HB-(1)/4CFAC, respectively, with no difference observed between COMM and RB fillets (P > 0.05). Higher values of hardness, gumminess, and chewiness were found for RB, no TA, and HB-(1)/4CFAC gels than COMM, TA, and WIC, respectively. These results generally indicated that protein quality and textural properties of turkey fillets were improved, regardless of strains or temperature abuse, using HB-(1)/4CFAC technology. PMID:26527709

  5. Shortening the Current Opioid Misuse Measure via computer-based testing: a retrospective proof-of-concept study

    PubMed Central

    2013-01-01

    Background The Current Opioid Misuse Measure (COMM) is a self-report questionnaire designed to help identify aberrant drug-related behavior in respondents who have been prescribed opioids for chronic pain. The full-length form of the COMM consists of 17 items. Some individuals, especially compromised individuals, may be deterred from taking the full questionnaire due to its length. This study examined the use of curtailment and stochastic curtailment, two computer-based testing approaches that sequentially determine the test length for each individual, to reduce the respondent burden of the COMM without compromising sensitivity and specificity. Methods Existing data from n = 415 participants, all of whom had taken the full-length COMM and had been classified via the Aberrant Drug Behavior Index (ADBI), were divided into training (n = 214) and test (n = 201) sets. Post-hoc analysis of the test set was performed to evaluate the screening results and test lengths that would have been obtained, if curtailment or stochastic curtailment had been used. Sensitivity, specificity, and average test length were calculated for each method and compared with the corresponding values of the full-length test. Results The full-length COMM had a sensitivity of 0.703 and a specificity of 0.701 for predicting the ADBI. Curtailment reduced the average test length by 22% while maintaining the same sensitivity and specificity as the full-length COMM. Stochastic curtailment reduced the average test length by as much as 59% while always obtaining a sensitivity of at least 0.688 and a specificity of at least 0.701 for predicting the ADBI. Conclusions Curtailment and stochastic curtailment have the potential to achieve substantial reductions in respondent burden without compromising sensitivity and specificity. The two sequential methods should be considered for future computer-based administrations of the COMM. PMID:24138225

  6. GABA mechanisms of the nucleus of the solitary tract regulates the cardiovascular and sympathetic effects of moxonidine.

    PubMed

    Alves, Thales B; Totola, Leonardo T; Takakura, Ana C; Colombari, Eduardo; Moreira, Thiago S

    2016-01-01

    The antihypertensive drugs moxonidine and clonidine are α2-adrenoceptor and imidazoline (I1) agonists. Previous results from our laboratory have shown that moxonidine can act in the commissural nucleus of the solitary tract (commNTS). In addition, some studies have shown that GABA or glutamate receptor blockade in the RVLM blunted the hypotension produced by these antihypertensive agents in spontaneously hypertensive rats. Therefore, in the present study we verify whether the cardiovascular and sympathetic effects produced by moxonidine in the commNTS are dependent on GABAergic or glutamatergic mechanisms. Mean arterial pressure (MAP) and splanchnic sympathetic nerve activity (sSNA) were recorded in urethane-anesthetized, and artificially-ventilated male Wistar rats (250-350 g). Injection of the GABAA antagonist bicuculline (25 pmol/50 nL) into the commNTS reduced the hypotension as well as the sympathoinhibition elicited by moxonidine. Prior injection of the glutamate receptor antagonist kynurenic acid (2.5 nmol/50 nL) into the commNTS was not effective in reducing the hypotension and sympathoinhibition elicited by moxonidine. Therefore, we conclude that the hypotensive and sympathoinhibitory effects elicited by microinjection of moxonidine into the commNTS are dependent on GABA receptors, but not ionotropic glutamate receptors. PMID:26633249

  7. The Impact of Data Communications Messages in the Terminal Area on Flight Crew Workload and Eye Scanning

    NASA Technical Reports Server (NTRS)

    Comstock, James R., Jr.; Baxley, Brian T.; Norman, Robert M.; Ellis, Kyle K. E.; Adams, Cathy A.; Latorella, Kara A.; Lynn, William A.

    2010-01-01

    This paper, to accompany a discussion panel, describes a collaborative FAA and NASA research study to determine the effect Data Communications (Data Comm) messages have on flight crew workload and eye scanning behavior in busy terminal area operations. In the Next Generation Air Transportation System Concept of Operations, for the period 2017-2022, the FAA envisions Data Comm between controllers and the flight crew to become the primary means of communicating non-time critical information. Four research conditions were defined that span current day to future equipage levels (Voice with Paper map, Data Comm with Paper map, Data Comm with Moving Map Display with ownship position displayed, Data Comm with Moving Map, ownship and taxi route displayed), and were used to create arrival and departure scenarios at Boston Logan Airport. Preliminary results for workload, situation awareness, and pilot head-up time are presented here. Questionnaire data indicated that pilot acceptability, workload, and situation awareness ratings were favorable for all of the conditions tested. Pilots did indicate that there were times during final approach and landing when they would prefer not to hear the message chime, and would not be able to make a quick response due to high priority tasks in the cockpit.

  8. Selection of optimal oligonucleotide probes for microarrays using multiple criteria, global alignment and parameter estimation

    PubMed Central

    Li, Xingyuan; He, Zhili; Zhou, Jizhong

    2005-01-01

    The oligonucleotide specificity for microarray hybridization can be predicted by its sequence identity to non-targets, continuous stretch to non-targets, and/or binding free energy to non-targets. Most currently available programs only use one or two of these criteria, which may choose ‘false’ specific oligonucleotides or miss ‘true’ optimal probes in a considerable proportion. We have developed a software tool, called CommOligo using new algorithms and all three criteria for selection of optimal oligonucleotide probes. A series of filters, including sequence identity, free energy, continuous stretch, GC content, self-annealing, distance to the 3′-untranslated region (3′-UTR) and melting temperature (Tm), are used to check each possible oligonucleotide. A sequence identity is calculated based on gapped global alignments. A traversal algorithm is used to generate alignments for free energy calculation. The optimal Tm interval is determined based on probe candidates that have passed all other filters. Final probes are picked using a combination of user-configurable piece-wise linear functions and an iterative process. The thresholds for identity, stretch and free energy filters are automatically determined from experimental data by an accessory software tool, CommOligo_PE (CommOligo Parameter Estimator). The program was used to design probes for both whole-genome and highly homologous sequence data. CommOligo and CommOligo_PE are freely available to academic users upon request. PMID:16246912

  9. Simulating economic effects of disruptions in the telecommunications infrastructure.

    SciTech Connect

    Cox, Roger Gary; Barton, Dianne Catherine; Reinert, Rhonda K.; Eidson, Eric D.; Schoenwald, David Alan

    2004-01-01

    CommAspen is a new agent-based model for simulating the interdependent effects of market decisions and disruptions in the telecommunications infrastructure on other critical infrastructures in the U.S. economy such as banking and finance, and electric power. CommAspen extends and modifies the capabilities of Aspen-EE, an agent-based model previously developed by Sandia National Laboratories to analyze the interdependencies between the electric power system and other critical infrastructures. CommAspen has been tested on a series of scenarios in which the communications network has been disrupted, due to congestion and outages. Analysis of the scenario results indicates that communications networks simulated by the model behave as their counterparts do in the real world. Results also show that the model could be used to analyze the economic impact of communications congestion and outages.

  10. Start with the seed: Native crops, indigenous knowledge, and community seed systems prerequisites for food sovereignty

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The dynamic conservation and sustainable utilization of native crop genetic resources are crucial for food sovereignty of Native American communities. Indigenous knowledge of crop diversity when linked to food traditions, local practices and social norms provide the basis for building sovereign comm...

  11. PHOTOSYNTHESIS AND RESPIRATION RATES IN THE MONTICELLO EXPERIMENTAL STREAMS: 1976/77 DIEL FIELD DATA AND COMPUTED RESULTS

    EPA Science Inventory

    Two-station diel dissolved oxygen measurements collected during 1976 and 1977 at the Monticello Ecological Research Station (Monticello, MN) have been analyzed by a graphical-analytical method and by a computer model, Dissolved Oxygen Routing Model (DORM), to determine daily comm...

  12. 76 FR 76759 - Certain Portable Communication Devices, Receipt of Complaint; Solicitation of Comments Relating...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-08

    ..., TX; HTC Corporation of Taiwan; HTC America, Inc. of Bellevue, WA; LG Electronics, Inc. of South Korea; LG Electronics U.S.A. Inc. of Englewood Cliffs, NJ; LG Electronics MobileComm U.S.A. Inc. of San Diego, CA; Motorola Mobility Holdings, Inc. of Libertyville, ] Illinois; Samsung Electronics Co.,...

  13. Phylogenomic analysis shows that Bacillus amyloliquefaciens subsp. plantarum is a later heterotypic synonym of Bacillus methylotrophicus

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The rhizosphere isolated bacteria belonging to the Bacillus amyloliquefaciens subsp. plantarum and Bacillus methylotrophicus clades are an important group of strains that are used as plant growth promoters and antagonists of plant pathogens. These properties have made these strains the focus of comm...

  14. On the early development of organic dyes for dye-sensitized solar cells.

    PubMed

    Kloo, Lars

    2013-07-28

    This viewpoint describes the background of the development of organic dyes for dye-sensitized solar cells, the impact of the 2006 ChemComm paper by Sun, Hagfeldt and co-workers regarding the D5 D-π-A-family of dyes, some recent developments and possible future challenges to meet. PMID:23775237

  15. 77 FR 49863 - Iowa Pacific Holdings, LLC and Permian Basin Railways-Continuance in Control Exemption-Santa Cruz...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-17

    .... Santa Cruz & Monterey Bay Ry.--Assignment of Lease Exemption-- Sierra N. Ry., Docket No. FD 35633. In... Cnty. Reg'l Transp. Comm'n--Petition for Declaratory Order, Docket No. FD 35653. SCCRTC seeks a finding... Proceedings. Derrick A. Gardner, Clearance Clerk. BILLING CODE 4915-01-P...

  16. 77 FR 49862 - Santa Cruz and Monterey Bay Railway Company-Acquisition and Operation Exemption-Union Pacific...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-17

    ... Regional Transportation Commission (SCCRTC). See Santa Cruz Cnty. Reg'l Transp. Comm'n--Petition for.... BILLING CODE 4915-01-P ... Road, near Watsonville Junction, Cal., to milepost 31.39 at the end of the line near Davenport,...

  17. Comparison of three single-nozzle operator-carried spray applicators for whitefly (Bemisia tabaci) management on squash

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Whiteflies cause problems in vegetable production on a global scale. The primary worldwide whitefly pest is Bemisia tabaci (Gennadius). Insecticides are commonly used to mitigate the whitefly problem in vegetable crops. In limited-resource crop production, operator-carried spray applicators are comm...

  18. Problem-Based Universal Design for Learning in Technical Communication and Rhetoric Instruction

    ERIC Educational Resources Information Center

    Williams, Joseph; Rice, Rich; Lauren, Ben; Morrison, Steve; Van Winkle, Kevin; Elliott, Tim

    2013-01-01

    It is crucial for Tech Comm instructors to address challenges of audience within the artificial environment of classroom instruction. Without a distinct and specific audience, course content often remains theoretical and abstract, and students struggle both to connect the unknown to the known, and to generate meaningful and effective…

  19. Analysis of molecular variability among the isolated of Verticillium dahliae from diverse host species based on florescene-based amplified fragment length polymorphism.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Verticillium dahliae is a soil borne fungus and the primary causal agent of Verticillium wilt, which affects many crops worldwide. Many crops grown in the Salinas Valley (SV) of California, including strawberry and lettuce (Lactuca sativa), are susceptible to V. dahliae and severe outbreaks are comm...

  20. Erosion Potential of Various Golf Course Bunker Sands

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Sand bunkers are principal golf course features adding aesthetic beauty and challenge for golfers. Bunkers often require substantial resources for proper maintenance particularly where sand is installed on severe slopes in humid climates subject to occasional heavy rainfall. Numerous sands are comme...

  1. Evaluation of feeding distiller's grains, containing virginiamycin, on antimicrobial susceptibilities in fecal isolates of Enterococcus and Escherichia coli and prevalence of resistance genes in cattle

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Dried distiller’s grains (DG), produced from fermentations using no antibiotic (Control) or dosed with 2 or 20 ppm virginiamycin product and containing 0, 0.7, and 8.9 ppm virginiamycin, respectively, were fed to cattle and effects on antibiotic sensitivity and prevalence of resistance genes in comm...

  2. Chemically Modified Fatty Acid Methyl Esters: Potential as Lubricant and Surfactant

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Renewable raw materials are going to play a noteworthy role in the development of sustainable green chemistry because of their eco-friendly and non-toxic nature. A novel process was developed for the production of biodegradable lubricant base stocks from epoxidized fatty acid methyl esters and comm...

  3. Root exudate diversity regulates soil fungal community composition and diversity

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Plant diversity is thought to influence diversity of the soil microbial community, though how this occurs is poorly understood. We report that under greenhouse conditions, two model plant species (Arabidopsis thaliana and Medicago truncatula) show an inability to support the native soil fungal comm...

  4. Using the Internet as a Classroom Information and Image Resource for the Development of a Television Advertising Campaign.

    ERIC Educational Resources Information Center

    Murray, Michael

    This report describes the use of the Internet as an image and information resource in an introductory television and radio production class (COMM 223: Principles of Radio and Television Production) at Western Illinois University. The report states that the class's two lab sections spent the first half of the semester preparing a television…

  5. Recovery Plan for Laurel Wilt of Avocado

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Laurel wilt kills American members of the Lauraceae plant family, including avocado (Persea americana). The disease threatens commercial avocado production in Florida, as well as the National Germplasm Repository for avocado in Miami (USDA-ARS). Elsewhere in the US, major (California) and minor comm...

  6. GENERATING SOPHISTICATED SPATIAL SURROGATES USING THE MIMS SPATIAL ALLOCATOR

    EPA Science Inventory

    The Multimedia Integrated Modeling System (MIMS) Spatial Allocator is open-source software for generating spatial surrogates for emissions modeling, changing the map projection of Shapefiles, and performing other types of spatial allocation that does not require the use of a comm...

  7. Speech of italian ambassador

    SciTech Connect

    2008-04-09

    L'ambassadeur italien (nom?)fait un discours sur l'aspect de la recherche au Cern, une organisation internationale qui a comme but la connaissance dans sa forme la plus pure et libre d'un intérêt planétaire. Il remet un prix au DG C.Rubbia qui lui remercie en français

  8. Speech Schopper

    SciTech Connect

    2006-11-03

    Le DG H.Schopper prend congé de ses directeurs et collègues qui partent et remercie aussi les restants pour leur service; d'autres orateurs comme p.ex. Mons.Ullmann ainsi qu'un allemand prennent la parole.

  9. Effects of mosquitofish, gambusia affinis, on channel catfish, Ictalurus puncatatus, production ponds

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Mosquitofish, Gambusia sp., have been spread throughout the world to biologically control mosquitoes. However, the fish has gained a reputation as an invasive species and has been implicated in displacing native aquatic species. Gambusia affinis is native to the southeastern United States and comm...

  10. Landscape corridors can increase invasion by an exotic species and reduce diversity of native species

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Although corridors have become commonplace in conservation to mitigate negative effects of habitat fragmentation, concerns persist that they may facilitate spread of invasive species. In a large-scale experiment, we measured effects of corridors on invasive fire ants, Solenopsis invicta, and on comm...

  11. Communiquer en milieu interculturel (Communicating in an Intercultural Environment).

    ERIC Educational Resources Information Center

    Yanaprasart, Patchareerat, Ed.

    2002-01-01

    The articles, written in French, in this issue refer to research and intercultural practices with regard to confrontational situations between two or more cultural systems. The titles are as follows: "La culture universitaire comme culture en soi" (The University Culture as a Culture in Its Own Right) (Aline Gohard-Radenkovic); "Interrelations…

  12. Speech Schopper

    ScienceCinema

    None

    2011-04-25

    Le DG H.Schopper prend congé de ses directeurs et collègues qui partent et remercie aussi les restants pour leur service; d'autres orateurs comme p.ex. Mons.Ullmann ainsi qu'un allemand prennent la parole.

  13. STATISTICS AND DATA ANALYSIS WORKSHOP

    EPA Science Inventory

    On Janauary 15 and 16, 2003, a workshop for Tribal water resources staff on Statistics and Data Analysis was held at the Indian Springs Lodge on the Forest County Potowatomi Reservation near Wabeno, WI. The workshop was co-sponsored by the EPA, Sokaogon Chippewa (Mole Lake) Comm...

  14. Phased Implementation Of At&T PACS At Duke University Medical Center

    NASA Astrophysics Data System (ADS)

    Stockbridge, Chris; Ravin, Carl E.

    1986-01-01

    "Help me communicate more quickly and more effectively with referring clinicians". This request was the driving force behind the installation of the AT&T CommViewm System at Duke. The CommView System is a type of Digital Image Management System and Picture Archival Communication System whose chief purpose is to deliver interpreted diagnostic images to referring clinicians and attending physicians. The system acquires electronic images from modal-ities in a diagnostic imaging facility, stores these images in computer managed patient files and distributes these on demand over fiber optic cable to Display Consoles. The CommView System was designed at AT&T Bell Labs; it uses fiber optic ribbon cable between buildings fused to multistrand lightguide building cables to distribute images, typically around a medical center or campus at data transfer rates of 40 Mbps. This paper gives the rationale used in designing a start-up network and placing the initial equipment for a field trial of the AT&T CommView System in the Radiology Department of Duke University Medical Center.

  15. "Phased Implementation Of AT&T PACS At Duke University Medical Center"

    NASA Astrophysics Data System (ADS)

    Stockbridge, Chris; Ravin, Carl E.

    1986-06-01

    "Help me communicate more quickly and more effectively with referring clinicians". This request was the driving force behind the installation of the AT&T CommView System at Duke. The CommView System is a type of Digital Image Management System and Picture Archival Communication System whose chief purpose is to deliver interpreted diagnostic images to referring clinicians and attending physicians. The system acquires electronic images from modalities in a diagnostic imaging facility, stores these images in computer managed patient files and distributes these on demand over fiber optic cable to Display Consoles. The CommView System was designed at AT&T Bell Labs; it uses fiber optic ribbon cable between buildings fused to multistrand lightguide building cables to distribute images, typically around a medical center or campus at data transfer rates of 40 Mbps. This paper gives the rationale used in designing a start-up network and placing the initial equipment for a field trial of the AT&T CommView System in the Radiology Department of Duke University Medical Center.

  16. Host plants of psyllids in south Texas

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Psyllids typically breed on a narrow range of usually related host plants. However, adult psyllids often feed on a wider array of plants, a strategy which undoubtedly enhances survival and perhaps even reproduction. For example, although the Asian citrus psyllid is the most common species on comme...

  17. TEXACO GASIFICATION PROCESS - INNOVATIVE TECHNOLOGY EVALUATION REPORT

    EPA Science Inventory

    This report summarizes the evaluation of the Texaco Gasification Process (TGP) conducted under the U.S. Environmental Protection Agency (EPA) Superfund Innovative Technology Evaluation (SITE) Program. The Texaco Gasification Process was developed by Texaco Inc. The TGP is a comm...

  18. Canadian Association for the Study of Adult Education. Proceedings of the Annual Conference (4th, Montreal, Quebec, Canada, May 28-30, 1985).

    ERIC Educational Resources Information Center

    Canadian Association for the Study of Adult Education, Guelph (Ontario).

    These proceedings contain 28 papers (20 in English and 8 in French), including the following: "Beyond Ideology: The Case of the Corporate Classroom" (Zinman); "De quelques dimensions paradoxales de l'education interculturelle" (Ollivier); "Ideology, Indoctrination and the Language of Physics" (Winchester); "L'education des adultes comme rite…

  19. Centenarian Einstein

    ScienceCinema

    None

    2011-04-25

    Commémoration de A.Einstein avec 4 orateurs pour honnorer sa mémoire: le prof.Weisskopf parlera de l'homme de science engagé, Daniel Amati du climat de la physique aux années 1920, Sergio Fubini de l'heure scientifique d'A.Einstein et le prof.Berob(?)

  20. Potential of common bean to enhance dietary iron availability in humans: Germplasm diversity and QTL analysis

    Technology Transfer Automated Retrieval System (TEKTRAN)

    We are interested in the improvement of iron nutritional status of humans living in developing world countries where iron deficiency anemia is quite severe. We also wish to promote the use of plant-based food sources to improve human iron status, and thus are focusing on staple food crops like comm...

  1. Evaluation of methods and plating media for detection of Campylobacter in ceca from 66 different broiler flocks across 11 months

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The ceca of broilers can be colonized with Campylobacter. Due to high numbers of other bacteria present, detecting Campylobacter in cecal contents can be challenging. On each of 66 sample days from April 2013 through February 2014, a single cecum was collected from the evisceration line in a comme...

  2. A Simplified Ecological Footprint At A Regional Scale

    EPA Science Inventory

    We calculated an Ecological Footprint Analysis (EFA) at a regional scale. EFA captures the human impact on the environmental system by identifying the amount of biologically productive land necessary to support a person’s level of consumption and waste generation. EFA is a comm...

  3. Laurel wilt: A global threat to avocado production

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Laurel wilt kills American members of the Lauraceae plant family, including avocado (Persea americana). The disease threatens commercial avocado production in Florida, as well as the National Germplasm Repository for avocado in Miami (USDA-ARS). Elsewhere in the US, major (California) and minor comm...

  4. Invariant Solutions to the Strominger System on Complex Lie Groups and Their Quotients

    NASA Astrophysics Data System (ADS)

    Fei, Teng; Yau, Shing-Tung

    2015-09-01

    Using canonical 1-parameter family of Hermitian connections on the tangent bundle, we provide invariant solutions to the Strominger system on certain complex Lie groups and their quotients. Both flat and non-flat cases are discussed in detail. This paper answers a question proposed by Andreas and Garcia-Fernandez in Comm Math Phys 332(3):1381-1383, 2014.

  5. Late blight-resistant tuber-bearing Solanum species in field and laboratory trials

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Late blight, caused by Phytophthora infestans, is the most disastrous and widespread disease of potato. One of the most effective means of controlling late blight is through the use of resistant cultivars, but newly developed resistant cultivars often lose their resistance after a few years of comm...

  6. Interleukin 1B genetic polymorphisms interact with polyunsaturated fatty acids to affect risk of the metabolic syndrome in the GOLDN Study

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Chronic inflammation has been identified as an important component of the metabolic syndrome (MetS). Therefore, environmental and genetic factors contributing to the variation of inflammatory responses could affect individuals’ susceptibility to the MetS. We investigated the association between comm...

  7. DIFFERENTIAL RESPONSE OF COMMON BEAN CULTIVARS TO PHAKOPSORA PACHYRHIZI

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Soybean rust (Phakopsora pachyrhizi H. Sydow & Sydow) has been reported on common beans (Phaseolus vulgaris L.) in Asia, South Africa, and the United States. However, there is little information on the interaction of individual isolates of P. pachyrhizi with common bean germplasm. A set of 16 comm...

  8. 75 FR 75335 - Integration of Variable Energy Resources

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-02

    ..., 2009 Wind Technologies Market Report 3-5 (2010), available at http://www1.eere.energy.gov/windandhydro/pdfs/2009_wind_technologies_market_report.pdf . \\32\\ Div. of Energy Market Oversight, Fed. Energy Regulatory Comm'n, 2009 State of the Markets Report (2010), available at...

  9. The Influence of Human and Environmental Exposure Factors on Personal NO2 Exposures

    EPA Science Inventory

    The US Environmental Protection Agency’s (US EPA) Detroit Exposure and Aerosol Research Study (DEARS) deployed a total of over 2000 nitrogen dioxide, NO2, passive monitors during 3 years of field data collections. These 24-h based personal, residential outdoor and comm...

  10. Sports Business Unit Meets Cross-Curricular Learning Goals: Grades 9-12

    ERIC Educational Resources Information Center

    Curriculum Review, 2006

    2006-01-01

    A new online learning tool called the eCommSports Kit links a seven-step sports marketing curriculum with a school team to give students real-life experience in developing and executing a plan to boost game attendance. The kit, available through http://www.ecommsports.com, takes teens on a cross-curricular journey through conducting business…

  11. The modified SWAT model for predicting fecal coliform in the Wachusett Reservoir Watershed, USA

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Fecal contamination has been an issue for water quality because fecal coliform bacteria are used as an indicator organism to detect pathogens in water. In order to assess fecal contamination in the Wachusett Reservoir Watershed in Massachusetts, USA, the Soil and Water Assessment Tool (SWAT), a comm...

  12. A Novel Approach to Investigate Internalization of Escherichia coli O157:H7 in Lettuce and Spinach

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The chromosomal integration of the green fluorescent protein (gfp) gene was successfully accomplished into four nalidixic acid resistant E. coli strains: two O157:H7 strains from produce outbreaks, 4407 and 5279, one O157:H7 strain from a beef-associated outbreak, 86-24h11, and a non-pathogenic comm...

  13. Essential oils as fumigants for bed bugs (Hemiptera: Cimicidae)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    In Petri dish assays, fumigation of a pyrethroid-susceptible strain of bed bugs Cimex lectularius L. (Hemiptera: Cimicidae) with various essential oils resulted in mortality that approached or equaled 100%, after 5 days. However, when bed bugs were exposed to the same essential oils in sealed, comme...

  14. Greenhouse gas emissions associated with direct energy inputs for a warmwater low-salinity recirculating aquaculture systems

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Greenhouse gases (GHGs) are gases that trap heat in the atmosphere. These gases include carbon dioxide (CO2), methane (CH3), nitrous oxide (N2O), and fluorinated gases. Some of these gases occur naturally and some are created by human activities which can increase their concentrations. The most comm...

  15. Exposure to Chemical and Non-Chemical Stressors in Vulnerable Groups and Potential Health Impacts

    EPA Science Inventory

    Exposures to chemical stressors Understanding of the myriad non-chemical stressorsLinkages between chemical and non-chemical stressors and health and well-beingPriority research in children’s environmental health, Tribal research needs, and disproportionately impacted comm...

  16. Community vs. Clinic-Based Modular Treatment of Children with Early-Onset ODD or CD: A Clinical Trial with 3-Year Follow-Up

    ERIC Educational Resources Information Center

    Kolko, David J.; Dorn, Lorah D.; Bukstein, Oscar G.; Pardini, Dustin; Holden, Elizabeth A.; Hart, Jonathan

    2009-01-01

    This study examines the treatment outcomes of 139, 6-11 year-old, clinically referred boys and girls diagnosed with Oppositional Defiant Disorder (ODD) or Conduct Disorder (CD) who were randomly assigned to a modular-based treatment protocol that was applied by research study clinicians either in the community (COMM) or a clinic office (CLINIC).…

  17. Predicting ecosystem stability from community composition and biodiversity

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The intuitive idea that biodiversity allows different species to compensate for each other and thereby leads to more stable communities was challenged by later theoretical work. The paradox can be resolved by the fact that diversity often has a dual effect on community stability: it stabilizes comm...

  18. "Going the Extra Mile in Downscaling: Why Downscaling is not jut "Plug-and-Play"

    EPA Science Inventory

    This presentation provides an example of doing additional work for preprocessing global climate model data for use in regional climate modeling simulations with the Weather Research and Forecasting (WRF) model. In this presentation, results from 15 months of downscaling the Comm...

  19. Population biology of Verticillium dahliae isolates from lettuce in the Sallinas Valley of Californis.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Verticillium dahliae is a soil borne fungus and the primary causal agent of Verticillium wilt, which affects many crops worldwide. Many crops grown in the Salinas Valley (SV) of California, including strawberry and lettuce (Lactuca sativa), are susceptible to V. dahliae and severe outbreaks are comm...

  20. PRODUCTION, SUPPLY, AND DISTRIBUTION (PS&D) DATA

    EPA Science Inventory

    This database contains current and historical official USDA data on production, supply and distribution of agricultural commodities for the United States and key producing and consuming countries. Users may select from a menu of pre-defined tables categorized by commodity or comm...

  1. Bacillus velezensis is not a later heterotypic synonym of Bacillus amyloliquefaciens; Bacillus methylotrophicus, Bacillus amyloliquefaciens subsp plantarum and ‘Bacillus oryzicola’ are later heterotypic synonyms of Bacillus

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The rhizosphere isolated bacteria belonging to the Bacillus amyloliquefaciens subsp. plantarum and Bacillus methylotrophicus clades are an important group of strains that are used as plant growth promoters and antagonists of plant pathogens. These properties have made these strains the focus of comm...

  2. Changes of oxidase and hydrolase activities in pecan leaves elicited by black pecan aphid (Hemiptera: Aphididae) feeding

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The black pecan aphid, Melanocallis caryaefoliae (Davis) (Hemiptera: Aphididae), is a foliar feeder of pecan, Carya illinoinensis (Wangenh.) K. Koch (Juglandaceae). The pest causes chlorosis of leaflet lamina, physiological damage to foliage and trees, and commonly limits the profitability of comme...

  3. Using a Reverse Auction to Promote Household Level Stormwater Control

    EPA Science Inventory

    Phase Two of the US Environmental Protection Agency’s (USEPA) National Pollution Discharge Elimination System (NPDES) stormwater regulations requires communities smaller than 100,000 residents to meet new criteria for stormwater runoff reduction. In many cases these smaller comm...

  4. Gene banks offer breeders access to germplasm: Germplasm collections help to preserve genetic diversity

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This article describes a coordinated system for conserving woody landscape plant germplasm in the United States. It provides an overview of the woody landscape plant germplasm collections of the USDA/ARS National Plant Germplasm System, a description of the Woody Landscape Plant Crop Germplasm Comm...

  5. MECHANISM OF EXTREME GENETIC RECOMBINATON IN WEEDY AMARANTHUS HYBRIDS

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The genus Amaranthus includes approximately 60 species distributed throughout the world, including cultivated grain crops as well as weed species. Ten species are considered significant weeds. It previously was shown that interspecific hybridization of A. palmeri (Palmer amaranth) and A. rudis (Comm...

  6. Differential iron distribution in seeds of two closely related legume species

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The World Health Organization states that the lack of micronutrients such as zinc and iron represents a major threat to the health and development of populations around the world. Iron deficiency affects over 2 billion people, in particular children and pregnant women in developing countries. A comm...

  7. CONTAMINANT SENSITIVITY OF THREATENED AND ENDANGERED FISHES COMPARED TO STANDARD SURROGATE SPECIES

    EPA Science Inventory

    Section 7 of the Endangered Species Act requires Federal agencies to insure that any action authorized, funded or carried out by them is not likely to jeopardize the continued existence of listed species or modify their critical habitat. The wide use of pesticides and other comm...

  8. Laccase-mediator catalyzed conversion of model lignin compounds

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Identifying suitable reaction conditions remains an important task in the development of practical enzyme catalysts. Laccases play an important role in the biological break down of lignin and have great potential in the deconstruction of lignocellulosic feedstocks. We examined 16 laccases, both comm...

  9. Selective oxidation of lignin model compounds – a combinatorial application of the laccase-mediator system

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Identifying suitable reaction conditions remains an important task in the development of practical enzyme catalysts. Laccases play an important role in the biological break down of lignin and have great potential in the deconstruction of lignocellulosic feedstocks. We examined 16 laccases, both comm...

  10. Chemical profiling and quantification of monacolins and citrinin in red yeast rice commercial raw materials and dietary supplements using liquid chromatography-accurate QToF mass spectrometry: chemometrics application

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Red yeast rice (RYR) is prepared by fermenting rice with various strains of the yeast Monascus spp of the Aspergillaceae family. Depending on the Monascus strains and the fermentation conditions, the products may contain monacolins, pigments and citrinin as secondary metabolites. Authentic and comme...

  11. Twisted Cyclic Cohomology and Modular Fredholm Modules

    NASA Astrophysics Data System (ADS)

    Rennie, Adam; Sitarz, Andrzej; Yamashita, Makoto

    2013-07-01

    Connes and Cuntz showed in [Comm. Math. Phys. 114 (1988), 515-526] that suitable cyclic cocycles can be represented as Chern characters of finitely summable semifinite Fredholm modules. We show an analogous result in twisted cyclic cohomology using Chern characters of modular Fredholm modules. We present examples of modular Fredholm modules arising from Podleś spheres and from SUq(2).

  12. 77 FR 47070 - Withdrawal of the Commission Policy Statement on Monetary Equitable Remedies in Competition Cases

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-07

    ...'n, Policy Statement on Monetary Equitable Remedies in Competition Cases, 68 FR 45,820 (Aug. 4, 2003..., 68 FR at 45,822. It has been our experience that the Policy Statement has chilled the pursuit of.... Trade Comm'n, Policy Statement on Monetary Equitable Remedies in Competition Cases, 68 FR 45,820 (Aug....

  13. PROLONGED FLOODING DECREASED STEM DENSITY, TREE SIZE AND SHIFTED COMPOSITION TOWARDS CLONAL SPECIES IN A CENTRAL FLORIDA HARDWOOD SWAMP

    EPA Science Inventory

    Human modifications of the landscape often cause changes in regional hydrology that, in turn, can result in the alteration of wetland hydrology. Altering hydrology can lead to hydroperiods that have prolonged or insufficient hydration, which can often cause changes in plant comm...

  14. THE DISTRIBUTION, SOLID-PHASE SPECIATION, AND DESORPTION/DISSOLUTION OF AS IN IRON-BASED DRINKING WATER TREATMENT MEDIA - JOURNAL

    EPA Science Inventory

    Arsenic concentrations (Total Recoverable As by EPA Method 3051, soluble, Toxicity Characteristic Leaching Procedure extractable) and solid-phase speciation (by X-ray Absorption Near-Edge Spectroscopy-XANES) were assessed as a function of depth through Fe-media beds for two comme...

  15. THE DISTRIBUTION, SOLID-PHASE SPECIATION, AND DESORPTION/DISSOLUTION OF AS IN IRON-BASED DRINKING WATER TREATMENT MEDIA 1

    EPA Science Inventory

    Arsenic concentrations (Total Recoverable As by EPA Method 3051, soluble, Toxicity Characteristic Leaching Procedure extractable) and solid-phase speciation (by X-ray Absorption Near-Edge Spectroscopy-XANES) were assessed as a function of depth through Fe-media beds for two comme...

  16. APPLIED CHEMICAL ECOLOGY OF THE ORIENTAL FRUIT MOTH: OPTIMIZING THE USE OF HAND-APPLIED DISPENSERS FOR MATING DISRUPTION

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The use of synthetic sex pheromones for mating disruption has been widely adopted as an environmentally safe alternative to broad-spectrum insecticides to control many lepidopteran pest species [1]. Among the controlled release devices for insect pheromones, hand-applied dispensers are the most comm...

  17. Membership Finland

    ScienceCinema

    None

    2011-04-25

    Le DG C.Rubbia et la vice présidente du conseil du Cern souhaite la bienvenue à l'adhésion de la Finlande, comme 15me membre du Cern depuis le 1. janvier 1991 en présence du secrétaire generale et de l'ambassadeur

  18. USER'S GUIDE AND DATA DICTIONARY FOR KENAI LAKES INVESTIGATION PROJECT

    EPA Science Inventory

    This database guide provides a brief overview of the survey and the Kenai Lakes Investigation Project (KLIP) results is found in Eilers et al (pers. comm.). his document also summarizes the sampling (Section 2.1) and analytical methods (Section 2.3), sources of geographic informa...

  19. Host specificity of the ruminal bacterial community in the dairy cow followng near-total exchange of ruminal contents

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The purpose of this study was to examine the stability and host specificity of a cow’s ruminal bacterial community following massive challenge with the ruminal microflora from another cow. In each of two experiments, one pair of cows was selected on the basis of differences in ruminal bacterial comm...

  20. NUTRITIONAL VALUE OF HEAT-TREATED SOYBEAN MEAL FOR CHANNEL CATFISH (ICTALURUS PUNCTATUS)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    A study was undertaken to evaluate the effect of heat treatment of defatted raw soybean meal (RSBM) on the growth, hematology, immune response and resistance of channel catfish to Edwardsiella ictaluri. Six isocaloric and isonitrogenous practical diets were formulated. A diet containing 45% of comm...

  1. Entropy descriptors and Entropy Stabilized Oxides

    NASA Astrophysics Data System (ADS)

    Curtarolo, Stefano

    In this presentation we will discuss the development of entropy descriptors for the AFLOWLIB.org ab-initio repository and the path leading to the synthesis of the novel entropy stabilized oxides. [Nat. Comm. 6:8485 (2015)]. Research sponsored by DOD-ONR N000141310635 and N000141512863.

  2. 78 FR 8390 - Procedures for the Handling of Retaliation Complaints Under the Employee Protection Provision of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-06

    ... authority in this regard to OSHA. See Secretary's Order 1-2012 (Jan. 18, 2012), 77 FR 3912 (Jan. 25, 2012... Department of Labor's Administrative Review Board (ARB). See Secretary's Order 1-2010, 75 FR 3924-01 (Jan. 25... statutes such as nondiscrimination provisions in Federal labor laws.''); Passaic Valley Sewerage Comm'rs...

  3. Naines blanches : Les diamants sont éternels

    NASA Astrophysics Data System (ADS)

    Bonnet-Bidaud, J. M.

    1997-08-01

    Ces etoiles minuscules, composantes essentielles de la Galaxie, sont responsables de phenomenes spectaculaires, comme les novae ou certaines supernovae. Mais les naines blanches se sont aussi revelees un fantastique outil pour la physique du XXe siecle, fournissant des confirmations eclatantes de deux grandes theories: la relativite generale et la mecanique quantique.

  4. Buyers Guide: Communications Software--Overview; Ratings Digest; Reviews; Benchmarks.

    ERIC Educational Resources Information Center

    Lockwood, Russ; And Others

    1988-01-01

    Contains articles which review communications software. Includes "Crosstalk Mark 4,""ProComm,""Freeway Advanced,""Windows InTalk,""Relay Silver," and "Smartcom III." Compares in terms of text proprietary, MCI upload, Test ASCII, Spreadsheet Proprietary, Text XMODEM, Spreadsheet XMODEM, MCI Download, Documentation, Support and Service, ease of use,…

  5. Actes du colloque sur la neologie et la formation des mots. (11/12 Nov. 1982). (Proceedings of a Colloquium on Neologism and Word Formation. [Neuchatel, Switzerland, November 11-12, 1982]).

    ERIC Educational Resources Information Center

    Travaux Neuchatelois de Linguistique (TRANEL), 1983

    1983-01-01

    The nine papers in this collection include: "L'expression du feminin dans l'adjectif latin: Genese et extension de *-ih2 comme morpheme de feminin grammatical en indo-europeen" (The Expression of the Feminine in the Latin Adjective: Genesis and Extension of the -ih2' as Grammatical Feminine Morpheme in Indo-European); "Lexikalische Neologismen und…

  6. Establishing Commercial Utility of Behavioral Control for Apple Maggot Fly

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Apple maggot fly is a key summer pest of apples throughout eastern North America, and poses an increasing threat to apple production in the Northwest. If left unchecked, the threat of AMF injury to fruit can be severe, resulting in complete loss of marketable crop. To combat AMF infestation, comme...

  7. Dietary Arsenic Toxicity in Subadult Rainbow Trout: Growth Effects, Nutrient Absorption, and Tissue Bioaccumulation

    EPA Science Inventory

    Dietary arsenic toxicity in subadult (~200 g.) rainbow trout was evaluated in a 70 day test using arsenic-spiked pellet diets containing 50, 104 and 162 ppm arsenite. All organisms in all treatments survived the exposure. Dose dependent effects on percent weight gain, with comm...

  8. Communication Labs Enhance Student Learning and Promote Awareness of the Discipline.

    ERIC Educational Resources Information Center

    Morreale, Sherwyn P.

    The use of a communication laboratory to support instruction in higher education is increasing in popularity. While enhancing communication education for majors and non-majors, a "comm lab" also promotes campus awareness and enhances the reputation of the communication department. The communication discipline lends itself to this form of pedagogy,…

  9. Methods for Environmental Management Research at Landscape and Watershed Scales

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Agriculture is as much as ever and perhaps more so today a landscape enterprise. And as we move into an era in which ecosystem services from agriculture are tabulated, valued, and judged by society, landscape involvement and management will become ever more important. The majority of the non-comm...

  10. On “Arbitrated quantum signature of classical messages against collective amplitude damping noise”

    NASA Astrophysics Data System (ADS)

    Chong, Song-Kong; Luo, Yi-Ping; Hwang, Tzonelih

    2011-02-01

    This study points out that a dishonest party in Yang and Wen's arbitrated quantum signature scheme [Opt. Comm. 283, (2010) 3198-3201] can reveal the other party's secret key without being detected by using the Trojan-horse attacks. Accordingly, the security requirements of a quantum signature, i.e. unforgeability and undeniability, may not be satisfied in their scheme.

  11. Sulfur, Protein Size Distribution, and Free Amino Acids in Flour Mill Streams and Their Relationship to Dough Rheology and Breadmaking Traits

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The aim of this study was to evaluate differences in sulfur content, protein size distribution, and free amino acids among flour mill streams (FMS) and their relationships to dough rheology and breadmaking traits. Information from this study would likely lead to more precise blending of FMS in comme...

  12. Examination of the cultivatable, aerobic microflora of swine feces and stored swine manure on various media and antibiotics

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Antimicrobial compounds have been commonly used as feed additives for domestic animals to reduce infection and promote growth. Recent concerns have suggested that such feeding practices may result in increased microbial resistance to antibiotics. Our laboratory has been studying the predominant comm...

  13. 76 FR 60867 - Certain Electronic Imaging Devices; Notice of Commission Determination To Review-in-Part a Final...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-30

    ... Flashpoint Technology, Inc. (``Flashpoint'') of Peterborough, New Hampshire. 75 FR 39971 (Jul. 8, 2010). The... FR 43251 (July 26, 2005). During this period, the subject articles would be entitled to enter the... Corp. v. Int'l Trade Comm'n, 264 F.3d 1094, 1105 (Fed. Cir. 2001). How does the law of...

  14. CLIMATE IMPACTS ON REGIONAL WATER

    EPA Science Inventory

    The New England region (including the 6 New England
    states plus upstate New York) offers a very diverse geography,
    matched by an equally diverse economy and human
    population. Livelihoods throughout the region are based
    on service industries that depend heavily on comm...

  15. Speech of italian ambassador

    ScienceCinema

    None

    2011-04-25

    L'ambassadeur italien (nom?)fait un discours sur l'aspect de la recherche au Cern, une organisation internationale qui a comme but la connaissance dans sa forme la plus pure et libre d'un intérêt planétaire. Il remet un prix au DG C.Rubbia qui lui remercie en français

  16. Adoption and Usage of mHealth Technology on Quality and Experience of Care Provided by Frontline Workers: Observations From Rural India

    PubMed Central

    Chaturvedi, Sharad; Chaudhuri, Indrajit; Krishnan, Ram; Lesh, Neal

    2015-01-01

    Background mHealth apps are deployed with the aim of improving access, quality, and experience of health care. It is possible that any mHealth intervention can yield differential impacts for different types of users. Mediating and determining factors, including personal and socioeconomic factors, affect technology adoption, the way health workers leverage and use the technology, and subsequently the quality and experience of care they provide. Objective To develop a framework to assess whether mHealth platforms affect the quality and experience of care provided by frontline workers, and whether these effects on quality and experience are different depending on the level of technology adoption and individual characteristics of the health worker. Literacy, education, age, and previous mobile experience are identified as individual factors that affect technology adoption and use, as well as factors that affect the quality and experience of care directly and via the technology. Methods Formative research was conducted with 15 community health workers (CHWs) using CommCare, an mHealth app for maternal and newborn care, in Bihar, India. CHWs were first classified on the level of CommCare adoption using data from CommCareHQ and were then shadowed on home visits to evaluate their levels of technology proficiency, and the quality and experience of care provided. Regression techniques were employed to test the relationships. Out of all the CHWs, 2 of them refused to participate in the home visits, however, we did have information on their levels of technology adoption and background characteristics, which were included in the analysis as relevant. Results Level of technology adoption was important for both quality and experience of care. The quality score for high users of CommCare was higher by 33.4% (P=.04), on average, compared to low users of CommCare. Those who scored higher on CommCare proficiency also provided significantly higher quality and experience of care, where

  17. A Field Comparison of Laser Hygrometers Over Snow

    NASA Astrophysics Data System (ADS)

    Drake, S.; Huwald, H.; Higgins, C. W.; Nolin, A. W.; Parlange, M. B.

    2010-12-01

    Water vapor flux is a key measurement over many landscapes and over snow in particular. In optimal conditions, laser hygrometers, combined with sonic anemometers, can produce accurate water vapor flux measurements. However, laser hygrometers are sensitive to varying field conditions encountered in cold, snowy environments. We present data obtained from a MayComm Laser Hygrometer and a Licor 7500 CO2/H2O Analyzer during a winter field experiment on Plaine Morte Glacier, Switzerland. The robustness of these two hygrometers is compared by analyzing their operational characteristics in suboptimal conditions such as the initiation of snow events and during periods of marginal power. We found that the MayComm instrument was more susceptible to power fluctuations but, unlike the Licor 7500, was able to measure water vapor during light snow events.

  18. Finite Time Extinction for Stochastic Sign Fast Diffusion and Self-Organized Criticality

    NASA Astrophysics Data System (ADS)

    Gess, Benjamin

    2015-04-01

    We prove finite time extinction for stochastic sign fast diffusion equations driven by linear multiplicative space-time noise, corresponding to the Bak-Tang-Wiesenfeld model for self-organized criticality. This solves a problem posed and left open in several works: (Barbu, Methods Appl Sci 36:1726-1733, 2013; Röckner and Wang, J Lond Math Soc (2) 87:545-560, 2013; Barbu et al. J Math Anal Appl 389:147-164, 2012; Barbu and Röckner, Comm Math Phys 311:539-555, 2012; Barbu et al., Comm Math Phys 285:901-923, 2009, C R Math Acad Sci Paris 347(1-2):81-84, 2009). The highly singular-degenerate nature of the drift in interplay with the stochastic perturbation causes the need for new methods in the analysis of mass diffusion, and several new estimates and techniques are introduced.

  19. Isoperimetry and Stability Properties of Balls with Respect to Nonlocal Energies

    NASA Astrophysics Data System (ADS)

    Figalli, A.; Fusco, N.; Maggi, F.; Millot, V.; Morini, M.

    2015-05-01

    We obtain a sharp quantitative isoperimetric inequality for nonlocal s-perimeters, uniform with respect to s bounded away from 0. This allows us to address local and global minimality properties of balls with respect to the volume-constrained minimization of a free energy consisting of a nonlocal s-perimeter plus a non-local repulsive interaction term. In the particular case s = 1, the s-perimeter coincides with the classical perimeter, and our results improve the ones of Knuepfer and Muratov (Comm. Pure Appl. Math. 66(7):1129-1162, 2013; Comm. Pure Appl. Math., 2014) concerning minimality of balls of small volume in isoperimetric problems with a competition between perimeter and a nonlocal potential term. More precisely, their result is extended to its maximal range of validity concerning the type of nonlocal potentials considered, and is also generalized to the case where local perimeters are replaced by their nonlocal counterparts.

  20. Scintillation-Hardened GPS Receiver

    NASA Technical Reports Server (NTRS)

    Stephens, Donald R.

    2015-01-01

    CommLargo, Inc., has developed a scintillation-hardened Global Positioning System (GPS) receiver that improves reliability for low-orbit missions and complies with NASA's Space Telecommunications Radio System (STRS) architecture standards. A software-defined radio (SDR) implementation allows a single hardware element to function as either a conventional radio or as a GPS receiver, providing backup and redundancy for platforms such as the International Space Station (ISS) and high-value remote sensing platforms. The innovation's flexible SDR implementation reduces cost, weight, and power requirements. Scintillation hardening improves mission reliability and variability. In Phase I, CommLargo refactored an open-source GPS software package with Kalman filter-based tracking loops to improve performance during scintillation and also demonstrated improved navigation during a geomagnetic storm. In Phase II, the company generated a new field-programmable gate array (FPGA)-based GPS waveform to demonstrate on NASA's Space Communication and Navigation (SCaN) test bed.

  1. Effect of cropping systems on adsorption of metals by soils: I. Single-metal adsorption

    SciTech Connect

    Basta, N.T.; Tabatabai, M.A. )

    1992-02-01

    The effect of long-term cropping systems on adsorption of metals was studied for soils obtained from two sites, Clarion-Webster Research Center (CWRC site) at Kanawha and Galva-Primghar Research Center (GPRC site) at Sutherland, under long-term rotation experiments in Iowa. Each experiment consisted of three cropping systems: continuous corn (CCCC), corn-soybean-corn-soybean (CSCS), and corn-oats-meadow-meadow (COMM), and treated with (+N) and without (0 N) ammoniacal fertilizer. In general, CSCS and COMM cropping systems did not significantly affect the metal adsorption maxima of soils obtained from both sites. Cadmium, Cu, and Pb adsorption were significantly correlated with pH and percentage base saturation for soils from both sites.

  2. New arbitrated quantum signature of classical messages against collective amplitude damping noise

    NASA Astrophysics Data System (ADS)

    Hwang, Tzonelih; Chong, Song-Kong; Luo, Yi-Ping; Wei, Tong-Xuan

    2011-06-01

    Recently, Chong et al. [Opt. Comm. 284, (2011) 893-895] pointed out that a dishonest party in Yang and Wen's arbitrated quantum signature scheme [Opt. Comm. 283, (2010) 3198-3201] is able to reveal the other party's secret key without being detected by using the Trojan-horse attacks. However, the solution to avoid the attack still remains open. This work further points out that in Yang and Wen's scheme, the arbitrator is unable to arbitrate the dispute between two users. Consequently, a user can deny that he/she has signed or verified a signature without performing a Trojan-horse attack. A solution is proposed to solve this problem as well as the open problem mentioned earlier.

  3. Hémorragies digestives hautes révélant une sangsue

    PubMed Central

    Mamoudou, Djafar; Diarra, Mahamadou; Ahidan, Rabiou; Garba, Moumouni; Idrissi, Mounia; Hida, Moustapha

    2015-01-01

    Les hémorragies digestives hautes sont un motif fréquent de consultation aux urgences pédiatriques et font généralement suite à des causes multiples comme les œsophagites, gastrites. Cependant son étiologie liée à l'ingestion accidentelle d'un corps étranger comme la sangsue est rarement décrite. Nous rapportons le cas d'un enfant de 3ans admis aux urgences pédiatriques pour des hémorragies digestives hautes chez qui l'endoscopie digestive avait mis en évidence une sangsue enclavée derrière la glotte. La prise en charge consistait en une extraction de ce corps étranger avec surveillance des constantes vitales. PMID:26889336

  4. Prolongation anormale d'un bloc fémoral analgésique: cas Clinique

    PubMed Central

    Koné, Joseph; Bensghir, Mustapha; Boutayeb, El Houcine; Haimeur, Charki

    2015-01-01

    La prolongation anormale d'un bloc nerveux peut être définie comme un dépassement du délai habituel de récupération sensitive ou motrice. A travers un cas clinique d'une prolongation anormale d'un bloc analgésique et une revue de la littérature, les auteurs discutent les facteurs de risque et les moyens de prévention de cette complication. PMID:26918085

  5. Un mode de découverte inhabituel d'hyperparathyroïdie primaire: fractures multiples sur tumeurs brunes secondaires à un adénome parathyroïdien ectopique médiastinal

    PubMed Central

    Yassine, Asmaa; Guerboub, Ahmed Anas; Arsalane, Adil; Biyi, Abdelhamid; Moussaoui, Souad El; Belmejdoub, Ghizlaine

    2015-01-01

    La tumeur brune est une entité clinique bénigne apparaissant comme une manifestation squelettique rare de l'hyperparathyroïdie primaire. Il s'agit d'une cause inhabituelle de fractures pathologiques. Nous rapportons ici le cas clinique d'un patient âgé de 20 ans chez qui l'hyperparathyroïdie primitive a été découverte devant des tumeurs brunes multiples. PMID:26966486

  6. Final Technical Report - Center for Technology for Advanced Scientific Component Software (TASCS)

    SciTech Connect

    Sussman, Alan

    2014-10-21

    This is a final technical report for the University of Maryland work in the SciDAC Center for Technology for Advanced Scientific Component Software (TASCS). The Maryland work focused on software tools for coupling parallel software components built using the Common Component Architecture (CCA) APIs. Those tools are based on the Maryland InterComm software framework that has been used in multiple computational science applications to build large-scale simulations of complex physical systems that employ multiple separately developed codes.

  7. Definition of experiments and instruments for a communication/navigation research laboratory. Volume 4: Programmatics

    NASA Technical Reports Server (NTRS)

    1972-01-01

    Details are provided for scheduling, cost estimates, and support research and technology requirements for a space shuttle supported manned research laboratory to conduct selected communication and navigation experiments. A summary of the candidate program and its time phasing is included, as well as photographs of the 1/20 scale model of the shuttle supported Early Comm/Nav Research Lab showing the baseline, in-bay arrangement and the out-of-bay configuration.

  8. Everest

    ScienceCinema

    None

    2011-04-25

    Chris Bonington, est né à Hampstead et a fait des études à University Collège School à Londres et au Royal Military Academy à Sundhorst. Il est un alpiniste mondialement connu qui a fait un grand nombre de premiers ascensions, comme celle de la face sud-ouest de l'Everest avec une équipe de 70 hommes en septembre 1975

  9. 2001 Mars Odyssey Mission

    NASA Technical Reports Server (NTRS)

    Varghese, Philip

    2008-01-01

    This viewgraph presentation reviews the 2001 Mars Odyssey Mission. The contents include: 1) Mission Overview; 2) Current Scope of Work: 3) Facilities; 4) Critical Role of DSN; 5) Relay as Mission Supplement; 6) Current Mars Telecom Infrastructure; 7) PHX EDL Comm Overview; 8) EDL Geometry (Entry through Landing); 9) Phoenix Support; 10) Preparations for Phoenix; 11) EDL Support Timeline; 12) One Year Rolling Schedule; 13) E3 Rationale; and 14) Spacecraft Status.

  10. 65th birthday Jack Steinberger

    ScienceCinema

    None

    2011-04-25

    Laudatio pour Jack Steinberger né le 25 mai 1921, à l'occasion de son 65me anniversaire et sa retraite officielle, pour sa précieuse collaboration au Cern. Néanmoins son principal activité continuera comme avant dans sa recherche au Cern. Plusieurs orateurs prennent la parole (p.ex. E.Picasso) pour le féliciter et lui rendre hommage

  11. Caractérisation électrique des interfaces P^+ - Si - poly/N-c-Si réalisées par dépôt LPCVD de films fortement dopés in situ au bore

    NASA Astrophysics Data System (ADS)

    Akani, M.; Benouis, C. E.; Benzohra, M.

    1993-11-01

    La liste des auteurs (et leur adresse) concernant cet article sont à corriger comme suit: The list of authors (and the address) for this article are to be corrected as follows: M. Idrissi-Benzohra, M. Akani, C. E. Benouis, M. Benzohra Laboratoire d'Analyse des Composants au Silcium, Université des Sciences et de la Technologie d'Oran, Oran El-Mnaouer 31000, Algérie.

  12. Everest

    SciTech Connect

    2006-04-20

    Chris Bonington, est né à Hampstead et a fait des études à University Collège School à Londres et au Royal Military Academy à Sundhorst. Il est un alpiniste mondialement connu qui a fait un grand nombre de premiers ascensions, comme celle de la face sud-ouest de l'Everest avec une équipe de 70 hommes en septembre 1975

  13. Systèmes de référence spatio-temporels. Colloque André Danjon "L'astronomie, la recherche et le temps présent".

    NASA Astrophysics Data System (ADS)

    Capitaine, N.; Débarbat, S.

    Contents: 1. Séance commémorative. 2. Méchanique céleste, informatique et relativité. 3. L'astrolabe de Danjon et ses développements. 4. Echelles de temps et astrométrie. 5. Techniques performantes en astrométrie moderne. 6. Des techniques spatiales aux systèmes de reference. 7. Radioastronomie et astronomie.

  14. 76 FR 15874 - Beneficial Ownership Reporting Requirements and Security-Based Swaps

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-22

    ..., Release No. 34-14692 (Apr. 21, 1978) [43 FR 18484]. Rule 13d-3(b) provides that `` ny person who, directly... on H.R. 14475 and S.510 before the Subcomm. on Commerce and Fin. of the H. Comm. on Interstate and Foreign Commerce, 90th Cong. (1968). \\16\\ 17 CFR 240.13d-101. \\17\\ See Section 13(d)(6) and Rule...

  15. Torleif Ericson 60th Birthday

    SciTech Connect

    2008-04-09

    Plusieurs discours à l'occasion du 60me anniversaire de Torleif Ericson, physicien né à Lund (Suède), et remerciements pour son travail et son effort de relier la physique des particules à la physique nucléaire. A la fin de la cérémonie un document scientifique de 400 pages "die Festschrift" lui est remis comme cadeau d'anniversaire avec un grand nombre de contributions d'amis etc...

  16. Mersenne, Marin (1588-1648)

    NASA Astrophysics Data System (ADS)

    Murdin, P.

    2000-11-01

    Born in Oize in Maine, France, joined the order of the Minims. The name signifies that the Minims regard themselves as the least (minimi) of all the religious orders, and this encapsulates Mersenne's self-effacing status in science. His own scientific work was modest, but he corresponded with numerous other eminent scientists and acted as a bulletin board among scientists and a scientific comme...

  17. Torleif Ericson 60th Birthday

    ScienceCinema

    None

    2011-04-25

    Plusieurs discours à l'occasion du 60me anniversaire de Torleif Ericson, physicien né à Lund (Suède), et remerciements pour son travail et son effort de relier la physique des particules à la physique nucléaire. A la fin de la cérémonie un document scientifique de 400 pages "die Festschrift" lui est remis comme cadeau d'anniversaire avec un grand nombre de contributions d'amis etc...

  18. Utilizing the ISS Mission as a Testbed to Develop Cognitive Communications Systems

    NASA Technical Reports Server (NTRS)

    Jackson, Dan

    2016-01-01

    The ISS provides an excellent opportunity for pioneering artificial intelligence software to meet the challenges of real-time communications (comm) link management. This opportunity empowers the ISS Program to forge a testbed for developing cognitive communications systems for the benefit of the ISS mission, manned Low Earth Orbit (LEO) science programs and future planetary exploration programs. In November, 1998, the Flight Operations Directorate (FOD) started the ISS Antenna Manager (IAM) project to develop a single processor supporting multiple comm satellite tracking for two different antenna systems. Further, the processor was developed to be highly adaptable as it supported the ISS mission through all assembly stages. The ISS mission mandated communications specialists with complete knowledge of when the ISS was about to lose or gain comm link service. The current specialty mandated cognizance of large sun-tracking solar arrays and thermal management panels in addition to the highly-dynamic satellite service schedules and rise/set tables. This mission requirement makes the ISS the ideal communications management analogue for future LEO space station and long-duration planetary exploration missions. Future missions, with their precision-pointed, dynamic, laser-based comm links, require complete autonomy for managing high-data rate communications systems. Development of cognitive communications management systems that permit any crew member or payload science specialist, regardless of experience level, to control communications is one of the greater benefits the ISS can offer new space exploration programs. The IAM project met a new mission requirement never previously levied against US space-born communications systems management: process and display the orientation of large solar arrays and thermal control panels based on real-time joint angle telemetry. However, IAM leaves the actual communications availability assessment to human judgement, which introduces

  19. Utilizing the ISS Mission as a Testbed to Develop Cognitive Communications Systems

    NASA Technical Reports Server (NTRS)

    Jackson, Dan

    2016-01-01

    The ISS provides an excellent opportunity for pioneering artificial intelligence software to meet the challenges of real-time communications (comm) link management. This opportunity empowers the ISS Program to forge a testbed for developing cognitive communications systems for the benefit of the ISS mission, manned Low Earth Orbit (LEO) science programs and future planetary exploration programs. In November, 1998, the Flight Operations Directorate (FOD) started the ISS Antenna Manager (IAM) project to develop a single processor supporting multiple comm satellite tracking for two different antenna systems. Further, the processor was developed to be highly adaptable as it supported the ISS mission through all assembly stages. The ISS mission mandated communications specialists with complete knowledge of when the ISS was about to lose or gain comm link service. The current specialty mandated cognizance of large sun-tracking solar arrays and thermal management panels in addition to the highly-dynamic satellite service schedules and rise/set tables. This mission requirement makes the ISS the ideal communications management analogue for future LEO space station and long-duration planetary exploration missions. Future missions, with their precision-pointed, dynamic, laser-based comm links, require complete autonomy for managing high-data rate communications systems. Development of cognitive communications management systems that permit any crew member or payload science specialist, regardless of experience level, to control communications is one of the greater benefits the ISS can offer new space exploration programs. The IAM project met a new mission requirement never previously levied against US space-born communications systems management: process and display the orientation of large solar arrays and thermal control panels based on real-time joint angle telemetry. However, IAM leaves the actual communications availability assessment to human judgment, which introduces

  20. Results of a Multi-level Intervention to Prevent and Control Childhood Obesity among Latino Children: The Aventuras Para Niños Study

    PubMed Central

    Crespo, Noe C.; Elder, John P.; Ayala, Guadalupe X.; Campbell, Nadia R.; Arredondo, Elva M.; Slymen, Donald J.; Baquero, Barbara; Sallis, James F.; McKenzie, Thomas L.

    2014-01-01

    Background Community-based behavioral interventions are needed to reduce the burden of childhood obesity. Purpose This study evaluated the impact of a multi-level promotora-based (Community Health Advisor) intervention to promote healthy eating and physical activity (PA) and prevent excess weight gain among Latino children. Methods Thirteen elementary schools were randomized to one of four intervention conditions: individual and family level (Fam-only), school and community level (Comm-only), combined Fam+Comm intervention, or a measurement-only condition. Participants were 808 Latino parents and their children enrolled in kindergarten through 2nd grade. Measures included parent and child BMI and a self-administered parent survey that assessed several parent and child behaviors. Results There were no intervention effects on children's BMI z-score. The Fam-only and Fam+Comm interventions changed several obesity-related child behaviors and these were mediated by changes in parenting variables. Discussion A promotora-based behavioral intervention was efficacious at changing parental factors and child obesity-related health behaviors. PMID:22215470

  1. Community vs. Clinic-based modular treatment of children with early-onset ODD or CD: A clinical trial with 3-year follow-up

    PubMed Central

    Kolko, David J.; Bukstein, Oscar G.; Padini, Dustin; Holden, Elizabeth A.; Hart, Jonathan; Dorn, Lorah D.

    2016-01-01

    This study examines the treatment outcomes of 144, 6–11 year-old, clinically referred boys and girls diagnosed with Oppositional Defiant Disorder (ODD) or Conduct Disorder (CD) who were randomly assigned to a modular-based treatment protocol that was applied by research study clinicians either in the community (COMM) or a clinic office (CLINIC). To examine normative comparisons, a matched sample of 69 healthy control children was included. Multiple informants completed diagnostic interviews and self-reports at six assessment timepoints (pretreatment to 3-year follow-up) to evaluate changes in the child’s behavioral and emotional problems, psychopathic features, functional impairment, diagnostic status, and service involvement. Using HLM and logistic regression models, COMM and CLINIC showed significant and comparable improvements on all outcomes. By 3-year follow-up, 36% of COMM and 47% of CLINIC patients no longer met criteria for either ODD or CD, and 48% and 57% of the children in these two respective conditions had levels of parent-rated externalizing behavior problems in the normal range. We discuss the nature and implications of these novel findings regarding the role of treatment context or setting for the treatment and long-term outcome of behavior disorders. PMID:19221871

  2. Aeronautical Satellite Data Link System (SDLS) for high-density air-traffic areas

    NASA Technical Reports Server (NTRS)

    Delrieu, Alain; Loisy, Claude; Clinch, Philip; Benhaim, Philippe

    1995-01-01

    The European Space Agency has recently commissioned a study to investigate the feasibility of a low-cost aeronautical Satellite Data Link System (SDLS) to provide for the needs of Air Traffic Services, i.e. safety related communications over continental areas with high air-traffic density. This study is placed in today's context which sees the first generation of Aeronautical Mobile Satellite System (AMSS) being gradually but restrictively put into service in oceanic airspaces with low air-traffic density. This paper first discusses the case of ATS dedicated versus mixed (ATS and commercial) Comms service provision and identifies the specific ATS comms requirements context. Specific emphasis is put on the ICAO (International Civil Aviation Organization) standardization framework for both the ATN (Aeronautical Telecommunication Network) and the SSR (Secondary Surveillance Radar) Mode S specific services. An architectural system and network design for a future SDLS is then proposed, such as to meet the ATS comms requirements within the realm of existing technologies. To minimize development risk and cost, consideration is given to re-use the ESA-developed Land Mobile Communication Technology, known as MSBN (Mobile Satellite Business Network) featuring distinct subnetworks. It is particularly suited to an ATM (Air Traffic Management) decentralized architecture made of independent ATC (Air Traffic Control) Centers. Finally the study follow-on phase is introduced, which is intended to cover system design and development leading to a demonstration program, as a first step towards proposals for international standardization and acceptance.

  3. Môle hydatiforme partielle invasive et métastatique: à propos d'un cas

    PubMed Central

    Lazrak, Ikram; Ihssane, Hakimi; Babahabib, Moulay Abdellah; Kouach, Jaouad; El Ochi, Mohamed Reda; Moussaoui, Moulay Driss; Dehayni, Mohamed

    2014-01-01

    Depuis plusieurs années, la môle hydatiforme partielle(MHP) a été considérée comme une entité bénigne qui ne nécessite pas une surveillance stricte comme celle de la môle complète(MC), mais l'apparition de quelques cas sporadiques de transformation de la môle partielle en maladie trophoblastique persistante que ça soit une môle invasive ou choriocarcinome ou voire même une tumeur du site d'implantation placentaire; a remis en question cette stratégie. A travers une observation d'une môle partielle invasive métastatique, et à travers une revue de la littérature, on a essayé d'appuyer cette conduite qui considère la môle partielle comme une pathologie potentiellement grave nécessitant une prise en charge adéquate et une surveillance assez rigoureuse. PMID:25815096

  4. Decay Rate for Travelling Waves of a Relaxation Model

    NASA Astrophysics Data System (ADS)

    Liu, Hailiang; Woo, Ching Wah; Yang, Tong

    1997-03-01

    A relaxation model was proposed in [Shi Jin and Zhouping Xin,Comm. Pure Appl. Math.48(1995), 555-563] to approximate the hyperbolic systems numerically under the subcharacteristic condition introduced in [T. P. Liu,Comm. Math. Phys.108(1987), 153-175]. The stability of travelling waves with strong shock profile and integral zero was proved in [H. L. Liu, J. H. Wang, and T. Yang, Stability in a relaxation model with nonconvex flux, preprint, 1996; H. L. Liu and J. Wang, Asymptotic stability of travelling wave solutions of a hyperbolic system with relaxation terms, preprint, 1995] when the original system is scalar. In this paper, we study the rate of the asymptotic convergence speed of thse travelling wave solutions. The analysis applies to the case of a nonconvex flux and when the shock speed coincides with characteristic speed of the state at infinity. The decay rate is obtained by applying the energy method and is shown to be the same as the one for the viscous conservation law [A. Matsumura and K. Nishihara,Comm. Math. Phys.165(1994), 83-96].

  5. Prediction of Traffic Complexity and Controller Workload in Mixed Equipage NextGen Environments

    NASA Technical Reports Server (NTRS)

    Lee, Paul U.; Prevot, Thomas

    2012-01-01

    Controller workload is a key factor in limiting en route air traffic capacity. Past efforts to quantify and predict workload have resulted in identifying objective metrics that correlate well with subjective workload ratings during current air traffic control operations. Although these metrics provide a reasonable statistical fit to existing data, they do not provide a good mechanism for estimating controller workload for future air traffic concepts and environments that make different assumptions about automation, enabling technologies, and controller tasks. One such future environment is characterized by en route airspace with a mixture of aircraft equipped with and without Data Communications (Data Comm). In this environment, aircraft with Data Comm will impact controller workload less than aircraft requiring voice communication, altering the close correlation between aircraft count and controller workload that exists in current air traffic operations. This paper outlines a new trajectory-based complexity (TBX) calculation that was presented to controllers during a human-in-the-loop simulation. The results showed that TBX accurately estimated the workload in a mixed Data Comm equipage environment and the resulting complexity values were understood and readily interpreted by the controllers. The complexity was represented as a "modified aircraft account" that weighted different complexity factors and summed them in such a way that the controllers could effectively treat them as aircraft count. The factors were also relatively easy to tune without an extensive data set. The results showed that the TBX approach is well suited for presenting traffic complexity in future air traffic environments.

  6. VizieR Online Data Catalog: O-M stars model atmospheres (Bessell+ 1998)

    NASA Astrophysics Data System (ADS)

    Bessell, M. S.; Castelli, F.; Plez, B.

    1998-03-01

    Broad band colors and bolometric corrections in the Johnson-Cousins-Glass system (Bessell, 1990PASP..102.1181B; Bessell & Brett, 1988PASP..100.1134B) have been computed from synthetic spectra from new model atmospheres of Kurucz (1995a, priv. comm.), Castelli (1997, priv. comm.), Plez, Brett & Nordlund (1992A&A...256..551P), Plez (1995-97, priv. comm.), and Brett (1995A&A...295..736B, 1995A&AS..109..263B). These atmospheres are representative of larger grids that are currently being completed. We discuss differences between the different grids and compare theoretical color-temperature relations and the fundamental color temperature relations derived from: (a) the infrared-flux method (IRFM) for A-K stars (Blackwell & Lynas-Gray 1994A&A...282..899B; Alonso et al. 1996A&AS..117..227A) and M dwarfs (Tsuji et al. 1996A&A...305L...1T); (b) lunar occultations (Ridgway et al. 1980ApJ...235..126R) and (c) Michelson interferometry (Di Benedetto & Rabbia 1987A&A...188..114D; Dyck et al. 1996AJ....111.1705D; Perrin et al. 1998A&A...331..619P) for K-M giants, and (d) eclipsing binaries for M dwarfs. We also compare color-color relations and color-bolometric correction relations and find good agreement except for a few colors. The more realistic fluxes and spectra of the new model grids should enable accurate population synthesis models to be derived and permit the ready calibration of non-standard photometric passbands. As well, the theoretical bolometric corrections and temperature-color relations will permit reliable transformation from observed color magnitude diagrams to theoretical HR diagrams. (6 data files).

  7. A Riemann-Hilbert approach to asymptotic questions for orthogonal polynomials

    NASA Astrophysics Data System (ADS)

    Deift, P.; Kriecherbauer, T.; McLaughlin, K. T.-R.; Venakides, S.; Zhou, X.

    2001-08-01

    A few years ago the authors introduced a new approach to study asymptotic questions for orthogonal polynomials. In this paper we give an overview of our method and review the results which have been obtained in Deift et al. (Internat. Math. Res. Notices (1997) 759, Comm. Pure Appl. Math. 52 (1999) 1491, 1335), Deift (Orthogonal Polynomials and Random Matrices: A Riemann-Hilbert Approach, Courant Lecture Notes, Vol. 3, New York University, 1999), Kriecherbauer and McLaughlin (Internat. Math. Res. Notices (1999) 299) and Baik et al. (J. Amer. Math. Soc. 12 (1999) 1119). We mainly consider orthogonal polynomials with respect to weights on the real line which are either (1) Freud-type weights d[alpha](x)=e-Q(x) dx (Q polynomial or Q(x)=x[beta], [beta]>0), or (2) varying weights d[alpha]n(x)=e-nV(x) dx (V analytic, limx-->[infinity] V(x)/logx=[infinity]). We obtain Plancherel-Rotach-type asymptotics in the entire complex plane as well as asymptotic formulae with error estimates for the leading coefficients, for the recurrence coefficients, and for the zeros of the orthogonal polynomials. Our proof starts from an observation of Fokas et al. (Comm. Math. Phys. 142 (1991) 313) that the orthogonal polynomials can be determined as solutions of certain matrix valued Riemann-Hilbert problems. We analyze the Riemann-Hilbert problems by a steepest descent type method introduced by Deift and Zhou (Ann. Math. 137 (1993) 295) and further developed in Deift and Zhou (Comm. Pure Appl. Math. 48 (1995) 277) and Deift et al. (Proc. Nat. Acad. Sci. USA 95 (1998) 450). A crucial step in our analysis is the use of the well-known equilibrium measure which describes the asymptotic distribution of the zeros of the orthogonal polynomials.

  8. A multicenter, primary care-based, open-label study to identify behaviors related to prescription opioid misuse, abuse, and diversion in opioid-experienced patients with chronic moderate-to-severe pain

    PubMed Central

    Setnik, Beatrice; Roland, Carl L; Sommerville, Kenneth W; Pixton, Glenn C; Berke, Robert; Calkins, Anne; Goli, Veeraindar

    2015-01-01

    Objective To compare the investigator assessment of patient risk for prescription opioid misuse, abuse, and diversion with patient self-reports of these activities in a population with chronic pain. Methods As a secondary objective of an open-label, multicenter, primary care-based clinical study to evaluate the success of converting opioid-experienced patients with chronic pain to morphine sulfate with sequestered naltrexone hydrochloride, risk for misuse, abuse, and diversion was assessed using two nonvalidated questionnaires: one was completed by the investigator and another by the patient (Self-Reported Misuse, Abuse, and Diversion [SR-MAD]). In addition, the validated Current Opioid Misuse Measure (COMM) test and urine drug test were used. Results Of the 684 patients assessed by the investigators, 537 returned the self-assessment, SR-MAD. Most patients were assigned by the investigator as low risk for misuse (84.2%), abuse (89.3%), and diversion (94.3%). Of the patients who returned SR-MAD, 60% indicated having taken more opioids than prescribed and 10.9% reported chewing or crushing their opioids in the past. Of the patients who completed COMM, 40.6% were deemed as having aberrant behaviors. COMM results correlated with the risk levels from the investigator assessment. One-third of patients (33.8%) had at least one abnormal urine drug test result. Conclusion More research is needed to better understand the gap between the investigator assessment of potential risk for misuse, abuse, and diversion and the actual extent of these behaviors among patients with chronic pain. PMID:26185467

  9. SpaceOps 2012 Plus 2: Social Tools to Simplify ISS Flight Control Communications and Log Keeping

    NASA Technical Reports Server (NTRS)

    Cowart, Hugh S.; Scott, David W.

    2014-01-01

    A paper written for the SpaceOps 2012 Conference (Simplify ISS Flight Control Communications and Log Keeping via Social Tools and Techniques) identified three innovative concepts for real time flight control communications tools based on social mechanisms: a) Console Log Tool (CoLT) - A log keeping application at Marshall Space Flight Center's (MSFC) Payload Operations Integration Center (POIC) that provides "anywhere" access, comment and notifications features similar to those found in Social Networking Systems (SNS), b) Cross-Log Communication via Social Techniques - A concept from Johnsson Space Center's (JSC) Mission Control Center Houston (MCC-H) that would use microblogging's @tag and #tag protocols to make information/requests visible and/or discoverable in logs owned by @Destination addressees, and c) Communications Dashboard (CommDash) - A MSFC concept for a Facebook-like interface to visually integrate and manage basic console log content, text chat streams analogous to voice loops, text chat streams dedicated to particular conversations, generic and position-specific status displays/streams, and a graphically based hailing display. CoLT was deployed operationally at nearly the same time as SpaceOps 2012, the Cross- Log Communications idea is currently waiting for a champion to carry it forward, and CommDash was approved as a NASA Iinformation Technoloby (IT) Labs project. This paper discusses lessons learned from two years of actual CoLT operations, updates CommDash prototype development status, and discusses potential for using Cross-Log Communications in both MCC-H and/or POIC environments, and considers other ways for synergizing console applcations.

  10. Biomixing by chemotaxis and efficiency of biological reactions: The critical reaction case

    NASA Astrophysics Data System (ADS)

    Kiselev, Alexander; Ryzhik, Lenya

    2012-11-01

    Many phenomena in biology involve both reactions and chemotaxis. These processes can clearly influence each other, and chemotaxis can play an important role in sustaining and speeding up the reaction. In continuation of our work [A. Kiselev and L. Ryzhik, "Biomixing by chemotaxis and enhancement of biological reactions," Comm. Partial Differential Equations 37, 298-318 (2012)], 10.1080/03605302.2011.589879, we consider a model with a single density function involving diffusion, advection, chemotaxis, and absorbing reaction. The model is motivated, in particular, by the studies of coral broadcast spawning, where experimental observations of the efficiency of fertilization rates significantly exceed the data obtained from numerical models that do not take chemotaxis (attraction of sperm gametes by a chemical secreted by egg gametes) into account. We consider the case of the weakly coupled quadratic reaction term, which is the most natural from the biological point of view and was left open in Kiselev and Ryzhik ["Biomixing by chemotaxis and enhancement of biological reactions," Comm. Partial Differential Equations 37, 298-318 (2012)], 10.1080/03605302.2011.589879. The result is that similarly to Kiselev and Ryzhik ["Biomixing by chemotaxis and enhancement of biological reactions," Comm. Partial Differential Equations 37, 298-318 (2012)], 10.1080/03605302.2011.589879, the chemotaxis plays a crucial role in ensuring efficiency of reaction. However, mathematically, the picture is quite different in the quadratic reaction case and is more subtle. The reaction is now complete even in the absence of chemotaxis, but the timescales are very different. Without chemotaxis, the reaction is very slow, especially for the weak reaction coupling. With chemotaxis, the timescale and efficiency of reaction are independent of the coupling parameter.

  11. Novel Variants of AbaR Resistance Islands with a Common Backbone in Acinetobacter baumannii Isolates of European Clone II

    PubMed Central

    Povilonis, Justas; Sužiedėlienė, Edita

    2012-01-01

    In this study, the genetic organization of three novel genomic antibiotic resistance islands (AbaRs) in Acinetobacter baumannii isolates belonging to group of European clone II (EC II) comM integrated sequences of 18-, 21-, and 23-kb resistance islands were determined. These resistance islands carry the backbone of AbaR-type transposon structures, which are composed of the transposition module coding for potential transposition proteins and other genes coding for the intact universal stress protein (uspA), sulfate permease (sul), and proteins of unknown function. The antibiotic resistance genes strA, strB, tetB, and tetR and insertion sequence CR2 element were found to be inserted into the AbaR transposons. GenBank homology searches indicated that they are closely related to the AbaR sequences found integrated in comM in strains of EC II (A. baumannii strains 1656-2 and TCDC-AB0715) and AbaR4 integrated in another location of A. baumannii AB0057 (EC I). All of the AbaRs showed structural similarity to the previously described AbaR4 island and share a 12,008-bp backbone. AbaRs contain Tn1213, Tn2006, and the multiple fragments which could be derived from transposons Tn3, Tn10, Tn21, Tn1000, Tn5393, and Tn6020, the insertion sequences IS26, ISAba1, ISAba14, and ISCR2, and the class 1 integron. Moreover, chromosomal DNA was inserted into distinct regions of the AbaR backbone. Sequence analysis suggested that the AbaR-type transposons have evolved through insertions, deletions, and homologous recombination. AbaR islands, sharing the core structure similar to AbaR4, appeared to be distributed in isolates of EC I and EC II via integration into distinct genomic sites, i.e., pho and comM, respectively. PMID:22290980

  12. Patient vs provider reports of aberrant medication-taking behavior among opioid-treated patients with chronic pain who report misusing opioid medication.

    PubMed

    Nikulina, Valentina; Guarino, Honoria; Acosta, Michelle C; Marsch, Lisa A; Syckes, Cassandra; Moore, Sarah K; Portenoy, Russell K; Cruciani, Ricardo A; Turk, Dennis C; Rosenblum, Andrew

    2016-08-01

    During long-term opioid therapy for chronic noncancer pain, monitoring medication adherence of patients with a history of aberrant opioid medication-taking behaviors (AMTB) is an essential practice. There is limited research, however, into the concordance among existing monitoring tools of self-report, physician report, and biofluid screening. This study examined associations among patient and provider assessments of AMTB and urine drug screening using data from a randomized trial of a cognitive-behavioral intervention designed to improve medication adherence and pain-related outcomes among 110 opioid-treated patients with chronic pain who screened positive for AMTB and were enrolled in a pain program. Providers completed the Aberrant Behavior Checklist (ABC) and patients completed the Current Opioid Misuse Measure (COMM) and the Chemical Coping Inventory (CCI). In multivariate analyses, ABC scores were compared with COMM and CCI scores, while controlling for demographics and established risk factors for AMTB, such as pain severity. Based on clinical cutoffs, 84% of patients reported clinically significant levels of AMTB and providers rated 36% of patients at elevated levels. Provider reports of AMTB were not correlated with COMM or CCI scores. However, the ABC ratings of experienced providers (nurse practitioners/attending physicians) were higher than those of less experienced providers (fellows) and were correlated with CCI scores and risk factors for AMTB. Associations between patient- and provider-reported AMTB and urine drug screening results were low and largely nonsignificant. In conclusion, concordance between patient and provider reports of AMTB among patients with chronic pain prescribed opioid medication varied by provider level of training. PMID:27082008

  13. Vortex merger in one-component plasmas

    NASA Astrophysics Data System (ADS)

    Pozzoli, R.; Amoretti, M.; Rome', M.; Salvaterra, L.

    1999-11-01

    The two-dimensional (axially averaged) dynamics of one-component plasmas in a Malmberg-Penning trap is characterized by the formation of localized structures where merger plays a dominant role. Merger of very localized vortices with an extended vortex is investigated by means of the 2D XOOPIC code [J.P. Varboncoeur, A.B.Langdon and N.T.Gladd, Comp. Phys. Comm. 87, 199 (1995)]. A comparison is made with the results of a theoretical model based on the Hamiltonian dynamics of a point vortex [I.M.Lansky, T.M.O'Neil, D.A.Schecter, PRL 79,1479(1997)].

  14. [Study on solid surface fluorescence characteristic of saline soils around lakes in arid and semiarid regions].

    PubMed

    Yu, Hui-bin; Xi, Bei-dou; Wei, Zi-min; Ma, Wen-chao; He, Xiao-song; Guo, Xu-jing; Liu, Hong-liang

    2010-10-01

    Fluorescence spectroscopy relies on the fluorescence emitted by rigid conjugated systems and thus has been increasingly used to assess the soil organic matter (SOM) humification. This technique is widely applied to solution samples of humic substances, and so far no information exists about its applicability to solid-phase soil samples. Composite soil samples of different depths (0-20, 20-40 and 40-60 cm) were collected from four different halophyte communities along a saline-impact gradient, namely, Comm. Salicornia europaea (CSE), Comm. Suaeda glauca (CSG), Comm. Kalidium foliatum (CKF) and Comm. Sophora alopecuroides (CSA) located around Wuliangsuhai Lake. A humification index based on solid surface fluorescence spectroscopy (HIX(SSF)) was proposed, and compared with conventional humification indices I400/I360, I470/I360, I465/I399 and A4 /Al. There were close positive linear correlations between HIXass and 1400/1360, 145/I399 and A4/A1, but a poor positive linear correlation existed between the HIX(SSF) and I470/I360. The results indicated that HIX(SSF) can be taken as a tool to assess the soil humi fication. The HIX(SSF) of the CSE and CSG varied inappreciably within soil profiles and there was no trend with depth. However the HIX(SSF) varied appreciably in the CKF and CSA, and the HIX(SSF) of the bottom soil profile was higher than that of the other profiles. As a whole, the soil humification degree was low around Wuliangsuhai Lake, and the ecological environment was relatively fragile. The salinity showed a strong negative linear relationship with the I400/I360, I470/I360, I465/I399 and A4/A1, but a good negative linear relationship with the HIX(SSF). The results indicated that the degree of the SOM humification increased with the drop in the salinity. The HIX(SSF) can be an indicator not only of the degree of SOM humification, but also of the process of the salinisation. PMID:21137399

  15. Labeled line drawing of launch and entry suit identifies various components

    NASA Technical Reports Server (NTRS)

    1988-01-01

    Line drawings illustrate the front and back of the space shuttle launch and entry suit (LES) and labels identify various components. LES was designed for STS-26, the return to flight mission, and subsequent missions. Included in the crew escape system (CES) package are launch and entry helmet (LEH) with communications carrier (COMM CAP), parachute pack and harness, life preserver unit (LPU), life raft unit (LRU), LES gloves, suit oxygen manifold and valves, boots, and survival gear. Details of larger components are also identified.

  16. Comparison of Ridges on Triton and Europa

    NASA Technical Reports Server (NTRS)

    Prockter, L. M.; Pappalardo, R. .

    2003-01-01

    Triton and Europa each display a variety of ridges and associated troughs. The resemblance of double ridges on these two satellites has been previously noted [R. Kirk, pers. comm.], but as yet, the similarities and differences between these feature types have not been examined in any detail. Triton s ridges, and Europa s, exhibit an evolutionary sequence ranging from isolated troughs, through doublet ridges, to complex ridge swaths [1, 2]. Comparison of ridges on Europa to those on Triton may provide insight into their formation on both satellites, and thereby have implications for the satellites' histories.

  17. Open University

    ScienceCinema

    None

    2011-04-25

    Michel Pentz est née en Afrique du Sud et venu au Cern en 1957 comme physicien et président de l'associaion du personnel. Il est également fondateur du mouvement Antiapartheid de Genève et a participé à la fondation de l'Open University en Grande-Bretagne. Il nous parle des contextes pédagogiques, culturels et nationaux dans lesquels la méthode peut s'appliquer.

  18. Definition of experiments and instruments for a communication/navigation research laboratory. Volume 2: Experiment selection

    NASA Technical Reports Server (NTRS)

    1972-01-01

    The selection and definition of candidate experiments and the associated experiment instrumentation requirements are described. Information is presented that addresses the following study objectives: (1) determine specific research and technology needs in the comm/nav field through a survey of the scientific/technical community; (2) develop manned low earth orbit space screening criteria and compile lists of potential candidate experiments; (3) in Blue Book format, define and describe selected candidate experiments in sufficient detail to develop laboratory configuration designs and layouts; and (4) develop experiment time phasing criteria and recommend a payload for sortie can/early laboratory missions.

  19. On modeling the neutron in classical physics: Methodical review

    NASA Astrophysics Data System (ADS)

    Eganova, I. A.; Kallies, W.

    2016-03-01

    It is demonstrated that the question of the elementary character of the neutron recently put forward by B.V. Vasil'ev in JINR Comm. P3-2014-77 requires the application of the whole system of logically consistent and experimentally verified knowledge obtained by M. Gryziński in deterministic atomic physics; the inconsistency of the two ideas presented in this work is demonstrated: (1) an electronlike elementary particle in the structure of the neutron which does not possess magnetic properties and (2) the planetary model of the neutron with pointlike elementary particles.

  20. Les Hemorragies Gastroduodenales de Stress Chez le Brule Grave

    PubMed Central

    Siah, S.; Fouadi, F.E.; Ababou, K.; Nassim Sabah, T.; Ihrai, I.

    2008-01-01

    Summary Les Auteurs rapportent trois observations d'hémorragies gastroduodénales de stress chez le brûlé grave. Ils rappellent l'importance des mesures thérapeutiques qui doivent être prises chez le brûlé grave, comme le traitement du choc, du sepsis, des plaies et de la douleur, la nutrition entérale précoce et l'oxygénothérapie. Tout cela permet de réduire les facteurs de risque de survenue d'une hémorragie gastroduodénale de stress. PMID:21991137

  1. Fear responses and postmortem muscle characteristics of turkeys of two genetic lines.

    PubMed

    Erasmus, M A; Lee, H C; Kang, I; Swanson, J C

    2015-09-01

    Commercial turkey production has increased greatly in recent decades. Along with increased production, problems with turkey meat quality have also increased. Research with other species has demonstrated that differences in meat quality exist among pigs and cattle differing in characteristics such as fearfulness. However, associations between fear responses and postmortem (PM) muscle characteristics related to the meat quality of turkeys have not been examined. This study evaluated the test-retest repeatability of responses of male commercial (COMM) and randombred (RB) turkeys in an open field (OF) test, which is used to assess fear and activity levels of poultry. Another objective of this study was to evaluate the relationship between behavioral OF responses and PM breast muscle characteristics (pH and R-value) that are related to meat quality. Thirdly, this study evaluated differences in pH and R-value between the turkey lines. Male COMM and RB turkeys were each housed in groups in 4 pens. Turkeys were individually tested in an OF (2.74×2.74 m, divided into 81 squares) at 1, 4, and 11 wk (COMM N=27; RB N=33). Turkeys were then grouped into clusters based on a cluster analysis of OF behavior. Turkeys were processed and meat quality characteristics were evaluated at 15-17 wk for COMM and 20-21 wk for RB turkeys. Results were analyzed using a mixed model (SAS 9.4). Breast muscle pH and R-value did not differ between genetic lines, and there were no differences in pH and R-value among clusters within genetic lines. These findings suggest that OF responses measured during rearing are not related to PM breast muscle pH and R-value, which ultimately affect meat quality. Further research is needed to assess whether other types of fear responses are associated with meat quality and whether differences in R-value between genetic lines are associated with differences in other meat quality characteristics. PMID:26195807

  2. Le naevus bleu cellulaire atypique du poignet: à propos d'un cas et revue de la literature

    PubMed Central

    Boussakri, Hassan; Roux, Jean Luc; Durand, Luc; Elibrahimi, Abdelhalim; Elmrini, Abdelmajid

    2014-01-01

    Le naevus bleu cellulaire atypique est une entité pathologique rare et sa localisation au niveau du poignet est exceptionnelle. Il est Considéré comme une Variante à des caractéristiques intermédiaires entre le naevus bleu cellulaire typique et le naevus bleu malin, dont l’évolution est incertaine. Le but de notre travail est d'attirer l'attention sur cette variété lésionnelle rare et de discuter les diagnostiques différentiels, ainsi que décrire les aspects histologique et les options thérapeutiques possibles. PMID:25426206

  3. Mean Curvature Flow in a Ricci Flow Background

    NASA Astrophysics Data System (ADS)

    Lott, John

    2012-07-01

    Following work of Ecker (Comm Anal Geom 15:1025-1061, 2007), we consider a weighted Gibbons-Hawking-York functional on a Riemannian manifold-with-boundary. We compute its variational properties and its time derivative under Perelman's modified Ricci flow. The answer has a boundary term which involves an extension of Hamilton's differential Harnack expression for the mean curvature flow in Euclidean space. We also derive the evolution equations for the second fundamental form and the mean curvature, under a mean curvature flow in a Ricci flow background. In the case of a gradient Ricci soliton background, we discuss mean curvature solitons and Huisken monotonicity.

  4. Nonlinear Stability of Strong Planar Rarefaction Waves for the Relaxation Approximation of Conservation Laws in Several Space Dimensions

    NASA Astrophysics Data System (ADS)

    Zhao, Huijiang

    2000-04-01

    In this paper, we show that a strong planar rarefaction wave is nonlinear stable, namely it is an attractor for the relaxation approximation of the scalar conservation laws in several space dimensions. Compared with former results obtained by T. P. Liu (1987, Comm. Math. Phys.108, 153-175) and T. Luo (1997, J. Differential Equations133, 255-279), our main novelty lies in the fact that the planar rarefaction waves do not need to be small, and in the one-dimensional case, the initial disturbance can also be chosen arbitrarily large.

  5. Pathomimie de l'enfant: à propos d'une observation

    PubMed Central

    Abilkassem, Rachid; Dini, Nezha; Ourai, Hakim; Kmari, Mohamed; Agadr, Aomar

    2013-01-01

    La pathomimie cutanée se définit comme une maladie factice, provoquée dans un etat de conscience claire par le patient lui-même, au niveau du revêtement cutanéo-muqueux et/ou des phanères. Rare chez l'enfant, il s'agit d'une manifestation psychopathologique potentiellement grave et souvent difficile à prendre en charge. Nous rapportons le cas d'une fillette de 10 ans présentant une pathomimie sous forme de lésions excoriées multiples du visage. PMID:23504605

  6. Asymmetric laser sideband generation with a tapered semiconductor amplifier

    NASA Astrophysics Data System (ADS)

    Yanakas, Michael; Lim, Michael

    2013-03-01

    We have constructed a free-space, frequency-shifted feedback amplifier using a tapered semiconductor gain element. The general layout of the system is similar to that described in Littler, et al., Opt. Comm. 88, 523 (1992). Traveling-wave feedback is demonstrated with the m = - 1 order of several different acousto-optic modulators driven at variable frequency. Asymmetric sideband production is observed in the rf spectrum of a fast photodiode and in the transmission of a scanning Fabry-Perot interferometer. The number of asymmetric modes is controlled with the AOM rf drive power and the seed laser optical power. Supported by NSF PHY-0613659

  7. Analysis Methods for the DRIFT Dark Matter Search

    NASA Astrophysics Data System (ADS)

    Ayad, R.; Hyatt, M.; Hanson-Hart, Z.; Katz-Hyman, M.; Maher, P.; Posner, A.; Martoff, C. J.; Kirkpatrick, J.; Snowden-Ifft, D. P.; Lawson, T. B.; Lightfoot, P. K.; Morgan, B.; Paling, S. M.; Roberts, J. W.; Robinson, M.; Spooner, N. J. C.

    2003-04-01

    The DRIFT Experiment [1] is an underground search for WIMP Dark Matter using a novel detector invented for this purpose: the Negative Ion TPC (NITPC). Data is collected in the form of digitized time-records of signals received on each active anode wire of the NITPC endcap. Analysis procedures developed to characterize this data and discriminate backgrounds (x-rays, gamma rays, alpha particles) from potential Dark Matter signals (simulated with neutron elastic scattering) will be discussed. [1] Low Pressure Negative Ion TPC for Dark Matter Search. D. P. Snowden-Ifft, C. J. Martoff, J. M. Burwell, Phys Rev. D. Rapid Comm. 61, 101301 (2000)

  8. Results from the DRIFT Dark Matter Search

    NASA Astrophysics Data System (ADS)

    Ayad, R.; Hyatt, M.; Hanson-Hart, Z.; Katz-Hyman, M.; Martoff, C. J.; Kirkpatrick, J.; Snowden-Ifft, D. P.; Lawson, T. B.; Lightfoot, P. K.; Morgan, B.; Paling, S. M.; Robinson, M.; Spooner, N. J. C.

    2004-05-01

    DRIFT [1] is the only direction-sensitive WIMP Dark Matter search experiment now running underground. It employs a novel detector invented for this purpose: the Negative Ion TPC (NITPC). Data is collected in the form of digitized time-records of signals received on each active anode wire of the NITPC endcap. New Results from 2002 data taking will be presented, especially on underground neutron calibration and background. [1] Low Pressure Negative Ion TPC for Dark Matter Search. D. P.Snowden-Ifft, C. J. Martoff, J. M. Burwell, Phys Rev. D. Rapid Comm. 61,101301 (2000).

  9. The Long and Winding Road to Gamma-Amino-Butyric Acid as Neurotransmitter.

    PubMed

    Avoli, Massimo; Krnjević, Krešimir

    2016-03-01

    This review centers on the discoveries made during more than six decades of neuroscience research on the role of gamma-amino-butyric acid (GABA) as neurotransmitter. In doing so, special emphasis is directed to the significant involvement of Canadian scientists in these advances. Starting with the early studies that established GABA as an inhibitory neurotransmitter at central synapses, we summarize the results pointing at the GABA receptor as a drug target as well as more recent evidence showing that GABAA receptor signaling plays a surprisingly active role in neuronal network synchronization, both during development and in the adult brain. Finally, we briefly address the involvement of GABA in neurological conditions that encompass epileptic disorders and mental retardation. RESUMÉ: Le chemin long et sinueux pour que le GABA soit reconnu comme un neurotransmetteur. Cette revue est axée sur les découvertes réalisées durant plus de six décennies de recherche en neurosciences sur l'acide gamma-aminobutyrique (GABA) comme neurotransmetteur. À cet effet, nous mettons une emphase particulière sur le rôle significatif de chercheurs canadiens dans ce domaine de recherche. En prenant comme point de départ les premières études qui ont établi que le GABA était un neurotransmetteur au niveau de synapses centrales, nous faisons le sommaire des résultats identifiant le récepteur GABA comme étant une cible thérapeutique ainsi que des données plus récentes montrant que la signalisation du récepteur GABAA joue, de façon surprenante, un rôle actif dans la synchronisation du réseau neuronal, tant au cours du développement que dans le cerveau adulte. Finalement, nous traitons brièvement du rôle de GABA dans les maladies neurologiques incluant les troubles épileptiques et l'arriération mentale. PMID:26763167

  10. Streamlined approach for environmental restoration closure report for Corrective Action Unit 454: Historical underground storage tank release sites, Nevada Test Site, Nevada

    SciTech Connect

    1998-04-01

    This report addresses the characterization of three historical underground storage tank (UST) petroleum hydrocarbon release sites identified as 12-B-1, 12-B-3, and 12-COMM-1. The sites are located within the Nevada Test Site in Area 12 at B Tunnel and a former Communications/Power Maintenance Shop. Release Site 12-B-1 was not able to be clean-closed as proposed in the SAFER Plan. However, hydrocarbon impacted soils were excavated down to bedrock. Release Site 12-B-3 was evaluated to verify that the identified release was not associated with the UST removed from the site. Analytical results support the assumption that wood or possibly a roof sealant used as part of the bunker construction could have been the source of hydrocarbons detected. Release Site 12-COMM-1 was not clean closed as proposed in the SAFER Plan. The vertical extent of impacted soils was determined not to extend below a depth of 2.7 m (9 ft) below ground surface (bgs). The lateral extent could not be defined due to the presence of a discontinuous lens of hydrocarbon-impacted soil.

  11. Topological Quantum Double

    NASA Astrophysics Data System (ADS)

    Bonneau, Philippe

    Following a preceding paper showing how the introduction of a t.v.s. topology on quantum groups led to a remarkable unification and rigidification of the different definitions, we adapt here, in the same way, the definition of quantum double. This topological double is dualizable and reflexive (even for infinite dimensional algebras). In a simple case we show, considering the double as the "zero class" of an extension theory, the uniqueness of the double structure as a quasi-Hopf algebra. A la suite d'un précédent article montrant comment l'introduction d'une topologie d'e.v.t. sur les groupes quantiques permet une unification et une rigidification remarquables des différentes définitions, on adapte ici de la même manière la définition du double quantique. Ce double topologique est alors dualisable et reflexif (même pour des algèbres de dimension infinie). Dans un cas simple on montre, en considérant le double comme la "classe zéro" d'une théorie d'extensions, l'unicité de cette structure comme algèbre quasi-Hopf.

  12. A simulation of a capacitively coupled oxygen discharge using the oopd1 particle-in-cell Monte Carlo code

    NASA Astrophysics Data System (ADS)

    Gudmundsson, J. T.; Lieberman, M. A.; Wang, Ying; Verboncoeur, J. P.

    2009-10-01

    The oopd1 particle-in-cell Monte Carlo (PIC-MC) code is used to simulate a capacitively coupled discharge in oxygen. oopd1 is a one-dimensional object-oriented PIC-MC code [1] in which the model system has one spatial dimension and three velocity components. It contains models for planar, cylindrical, and spherical geometries and replaces the XPDx1 series [2], which is not object-oriented. The revised oxygen model includes, in addition to electrons, the oxygen molecule in ground state, the oxygen atom in ground state, the negative ion O^-, and the positive ions O^+ and O2^+. The cross sections for the collisions among the oxygen species have been significantly revised from earlier work using the xpdp1 code [3]. Here we explore the electron energy distribution function (EEDF), the ion energy distribution function (IEDF) and the density profiles for various pressures and driving frequencies. In particular we investigate the influence of the O^+ ion on the IEDF, we explore the influence of multiple driving frequencies, and we do comparisons to the previous xpdx1 codes. [1] J. P. Verboncoeur, A. B. Langdon, and N. T. Gladd, Comp. Phys. Comm. 87 (1995) 199 [2] J. P. Verboncoeur, M. V. Alves, V. Vahedi, and C. K. Birdsall, J. Comp. Physics 104 (1993) 321 [2] V. Vahedi and M. Surendra, Comp. Phys. Comm. 87 (1995) 179

  13. Scalable and Fault Tolerant Failure Detection and Consensus

    SciTech Connect

    Katti, Amogh; Di Fatta, Giuseppe; Naughton III, Thomas J; Engelmann, Christian

    2015-01-01

    Future extreme-scale high-performance computing systems will be required to work under frequent component failures. The MPI Forum's User Level Failure Mitigation proposal has introduced an operation, MPI_Comm_shrink, to synchronize the alive processes on the list of failed processes, so that applications can continue to execute even in the presence of failures by adopting algorithm-based fault tolerance techniques. This MPI_Comm_shrink operation requires a fault tolerant failure detection and consensus algorithm. This paper presents and compares two novel failure detection and consensus algorithms. The proposed algorithms are based on Gossip protocols and are inherently fault-tolerant and scalable. The proposed algorithms were implemented and tested using the Extreme-scale Simulator. The results show that in both algorithms the number of Gossip cycles to achieve global consensus scales logarithmically with system size. The second algorithm also shows better scalability in terms of memory and network bandwidth usage and a perfect synchronization in achieving global consensus.

  14. The dispersion-focalization theory of sound systems

    NASA Astrophysics Data System (ADS)

    Schwartz, Jean-Luc; Abry, Christian; Boë, Louis-Jean; Vallée, Nathalie; Ménard, Lucie

    2005-04-01

    The Dispersion-Focalization Theory states that sound systems in human languages are shaped by two major perceptual constraints: dispersion driving auditory contrast towards maximal or sufficient values [B. Lindblom, J. Phonetics 18, 135-152 (1990)] and focalization driving auditory spectra towards patterns with close neighboring formants. Dispersion is computed from the sum of the inverse squared inter-spectra distances in the (F1, F2, F3, F4) space, using a non-linear process based on the 3.5 Bark critical distance to estimate F2'. Focalization is based on the idea that close neighboring formants produce vowel spectra with marked peaks, easier to process and memorize in the auditory system. Evidence for increased stability of focal vowels in short-term memory was provided in a discrimination experiment on adult French subjects [J. L. Schwartz and P. Escudier, Speech Comm. 8, 235-259 (1989)]. A reanalysis of infant discrimination data shows that focalization could well be the responsible for recurrent discrimination asymmetries [J. L. Schwartz et al., Speech Comm. (in press)]. Recent data about children vowel production indicate that focalization seems to be part of the perceptual templates driving speech development. The Dispersion-Focalization Theory produces valid predictions for both vowel and consonant systems, in relation with available databases of human languages inventories.

  15. Complex topological structures of frustrated liquid crystals with potential for optics and photonics (Presentation Recording)

    NASA Astrophysics Data System (ADS)

    Žumer, Slobodan; Čančula, Miha; Čopar, Simon; Ravnik, Miha

    2015-10-01

    Geometrical constrains and intrinsic chirality in nematic mesophases enable formation of stable and metastable complex defect structures. Recently selected knotted and linked disclinations have been formed using laser manipulation of nematic braids entangling colloidal particles in nematic colloids [Tkalec et al., Science 2011; Copar et al., PNAS 2015]. In unwinded chiral nematic phases stable and metastable toron and hopfion defects have been implemented by laser tweezers [Smalyukh et al., Nature Materials 2010; Chen et al., PRL2013] and in chiral nematic colloids particles dressed by solitonic deformations [Porenta et al., Sci. Rep. 2014]. Modelling studies based on the numerical minimisation of the phenomenological free energy, supported with the adapted topological theory [Copar and Zumer, PRL 2011; Copar, Phys. Rep. 2014] allow describing the observed nematic defect structures and also predicting numerous structures in confined blue phases [Fukuda and Zumer, Nature Comms 2011 and PRL 2011] and stable knotted disclinations in cholesteric droplets with homeotropic boundary [Sec et al., Nature Comms 2014]. Coupling the modeling with finite difference time domain light field computation enables understanding of light propagation and light induced restructuring in these mesophases. The method was recently demonstrated for the description of low intensity light beam changes during the propagation along disclination lines [Brasselet et al., PRL 2009; Cancula et al., PRE 2014]. Allowing also high intensity light an order restructuring is induced [Porenta et al., Soft Matter 2012; Cancula et al., 2015]. These approaches help to uncover the potential of topological structures for beyond-display optical and photonic applications.

  16. L’acétaminophène chez les enfants

    PubMed Central

    Goldman, Ran D.

    2013-01-01

    Résumé Question Je suggère fréquemment aux parents d’utiliser de l’acétaminophène comme traitement de la fièvre et de la douleur pour leurs enfants. J’ai récemment reçu un enfant à mon cabinet qui s’est présenté avec une éruption cutanée sous forme de lésions en cibles une journée après avoir pris de l’acétaminophène. L’éruption s’est résorbée 3 jours après qu’on ait arrêté l’administration d’acétaminophène. L’acétaminophène comporte-t-elle des risques d’événements indésirables comme celui-ci? Réponse Comme les autres médicaments ou substances actives, les préparations d’acétaminophène pourraient poser des risques d’événements indésirables. Au cours des dernières années, on a procédé à une investigation concernant une association potentielle entre l’acétaminophène et l’asthme et la Food and Drug Administration des États-Unis a récemment publié un avertissement à propos de réactions cutanées éventuelles, graves mais rares, associées à l’acétaminophène. Même si l’acétaminophène est principalement un médicament sûr, les professionnels de la santé devraient être alertes et informer les parents à propos de la possibilité d’événements indésirables rares mais sévères.

  17. Analysis of Interactive Conflict Resolution Tool Usage in a Mixed Equipage Environment

    NASA Technical Reports Server (NTRS)

    Homola, Jeffrey; Morey, Susan; Cabrall, Christopher; Martin, Lynne; Mercer, Joey; Prevot, Thomas

    2013-01-01

    A human-in-the-loop simulation was conducted that examined separation assurance concepts in varying levels of traffic density with mixtures of aircraft equipage and automation. This paper's analysis focuses on one of the experimental conditions in which traffic levels were approximately fifty percent higher than today, and approximately fifty percent of the traffic within the test area were equipped with data communications (data comm) capabilities. The other fifty percent of the aircraft required control by voice much like today. Within this environment, the air traffic controller participants were provided access to tools and automation designed to support the primary task of separation assurance that are currently unavailable. Two tools were selected for analysis in this paper: 1) a pre-probed altitude fly-out menu that provided instant feedback of conflict probe results for a range of altitudes, and 2) an interactive auto resolver that provided on-demand access to an automation-generated conflict resolution trajectory. Although encouraged, use of the support tools was not required; the participants were free to use the tools as they saw fit, and they were also free to accept, reject, or modify the resolutions offered by the automation. This mode of interaction provided a unique opportunity to examine exactly when and how these tools were used, as well as how acceptable the resolutions were. Results showed that the participants used the pre-probed altitude fly-out menu in 14% of conflict cases and preferred to use it in a strategic timeframe on data comm equipped and level flight aircraft. The interactive auto resolver was also used in a primarily strategic timeframe on 22% of conflicts and that their preference was to use it on conflicts involving data comm equipped aircraft as well. Of the 258 resolutions displayed, 46% were implemented and 54% were not. The auto resolver was rated highly by participants in terms of confidence and preference. Factors such as

  18. Analyse des transferts de chaleur et de masse transitoires dans un arena a l'aide de la methode zonale

    NASA Astrophysics Data System (ADS)

    Daoud, Ahmed

    Cette these presente les resultats d'une etude sur le mouvement de l'air et les transferts thermiques et massiques dans les arenas en regime transitoire et en 3D. Pour la partie aeraulique, il a ete question de developper un modele base sur la methode zonale qui permet de calculer les debits de l'air (dus a la ventilation et aux gradients de temperature) et de l'humidite entre les differentes zones du batiment et de determiner l'age de l'air dans chacune des zones. Pour la partie thermique, un modele de calcul du rayonnement entre les surfaces interieures du batiment qui a ete couple a TRNSYS afin de calculer sur une base annuelle les charges de chauffage et de refrigeration; ces dernieres tiennent compte des transferts radiatif et convectif, de la chaleur latente due a la condensation de l'humidite sur la glace et du surfacage. Le document presente est constitue de 7 chapitres qui peuvent etre resumes comme suit: Les chapitres 1, 2 et 3 sont consacres respectivement: a l'introduction generale, a la revue bibliographique et a la description du batiment modelise. Le chapitre 4 decrit l'approche developpee et la contribution importante qui y est apportee. Il presente l'utilisation de la methode zonale comme une alternative pratique aux methodes CFD car elle permet de realiser des simulations dynamiques sur une annee avec des temps de simulation tres courts et une precision acceptable. Il s'agit d'une approche intermediaire entre les modeles CFD et les modeles a un noeud d'air (considerant la temperature homogene dans un local). Le chapitre 5 est consacre a la methode de resolution numerique. L'outil de simulation a ete developpe en utilisant l'interface du logiciel TRNSYS: Le type 56 de ce logiciel a ete adopte comme modele energetique tandis que les autres modeles ont ete developpes et programmes en utilisant le logiciel MATLAB. Le chapitre 6 presente les resultats de simulation pour un arena sans faux plafond et avec un faux plafond et les resultats de mesures

  19. To be or not to be Yutsis: Algorithms for the decision problem

    NASA Astrophysics Data System (ADS)

    Van Dyck, D.; Brinkmann, G.; Fack, V.; McKay, B. D.

    2005-12-01

    Generalized recoupling coefficients or 3nj-coefficients can be expressed as multiple sums over products of Racah or 6 j-coefficients [L.C. Biedenharn, J.D. Louck, Coupling of n angular momenta: recoupling theory, in: The Racah-Wigner Algebra in Quantum Theory, Encyclopedia of Mathematics and its Applications, vol. 9, Addison-Wesley, 1981, pp. 435-481]. The problem of finding an optimal summation formula (i.e. with a minimal number of Racah coefficients) for a given 3nj-coefficient is equivalent to finding an optimal reduction of a so-called Yutsis graph [A.P. Yutsis, I.B. Levinson, V.V. Vanagas, Mathematical Apparatus of the Theory of Angular Momentum, Israel Program for Scientific Translation, Jerusalem, 1962]. In terms of graph theory Yutsis graphs are connected simple cubic graphs which can be partitioned into two vertex induced trees. The two parts are necessarily of the same size. In this area Yutsis graphs are also studied under the name of cubic dual Hamiltonian graphs [F. Jaeger, On vertex-induced forests in cubic graphs, in: Proc. 5th Southeastern Conference, Congr. Numer. (1974) 501-512]. We present algorithms for determining whether a cubic graph is a Yutsis graph. This is interesting for generating large test cases for programs (as in [P.M. Lima, Comput. Phys. Comm. 66 (1991) 89; S. Fritzsche, T. Inghoff, T. Bastug, M. Tomaselli, Comput. Phys. Comm. 139 (2001) 314; D. Van Dyck, V. Fack, GYutsis: heuristic based calculation of general recoupling coefficients, Comput. Phys. Comm. 154 (2003) 219-232]) that determine a summation formula for a 3nj-coefficient. Moreover, we give the numbers of Yutsis and non-Yutsis cubic graphs with up to 30 vertices and cubic polyhedra with up to 40 vertices. All these numbers have been computed by two independent programs in order to reduce the probability of error. Since the decision problem whether a given cubic graph is Yutsis or not is NP-complete, we could not hope for a polynomial time worst case performance of our

  20. Peripheral chemoreceptor inputs to retrotrapezoid nucleus (RTN) CO2-sensitive neurons in rats

    PubMed Central

    Takakura, Ana Carolina Thomaz; Moreira, Thiago Santos; Colombari, Eduardo; West, Gavin H; Stornetta, Ruth L; Guyenet, Patrice G

    2006-01-01

    The rat retrotrapezoid nucleus (RTN) contains pH-sensitive neurons that are putative central chemoreceptors. Here, we examined whether these neurons respond to peripheral chemoreceptor stimulation and whether the input is direct from the solitary tract nucleus (NTS) or indirect via the respiratory network. A dense neuronal projection from commissural NTS (commNTS) to RTN was revealed using the anterograde tracer biotinylated dextran amine (BDA). Within RTN, 51% of BDA-labelled axonal varicosities contained detectable levels of vesicular glutamate transporter-2 (VGLUT2) but only 5% contained glutamic acid decarboxylase-67 (GAD67). Awake rats were exposed to hypoxia (n = 6) or normoxia (n = 5) 1 week after injection of the retrograde tracer cholera toxin B (CTB) into RTN. Hypoxia-activated neurons were identified by the presence of Fos-immunoreactive nuclei. CommNTS neurons immunoreactive for both Fos and CTB were found only in hypoxia-treated rats. VGLUT2 mRNA was detected in 92 ± 13% of these neurons whereas only 12 ± 9% contained GAD67 mRNA. In urethane–chloralose-anaesthetized rats, bilateral inhibition of the RTN with muscimol eliminated the phrenic nerve discharge (PND) at rest, during hyperoxic hypercapnia (10% CO2), and during peripheral chemoreceptor stimulation (hypoxia and/or i.v. sodium cyanide, NaCN). RTN CO2-activated neurons were recorded extracellularly in anaesthetized intact or vagotomized rats. These neurons were strongly activated by hypoxia (10–15% O2; 30 s) or by NaCN. Hypoxia and NaCN were ineffective in rats with carotid chemoreceptor denervation. Bilateral injection of muscimol into the ventral respiratory column 1.5 mm caudal to RTN eliminated PND and the respiratory modulation of RTN neurons. Muscimol did not change the threshold and sensitivity of RTN neurons to hyperoxic hypercapnia nor their activation by peripheral chemoreceptor stimulation. In conclusion, RTN neurons respond to brain PCO2 presumably via their intrinsic

  1. ExHuME 1.3: A Monte Carlo event generator for exclusive diffraction

    NASA Astrophysics Data System (ADS)

    Monk, J.; Pilkington, A.

    2006-08-01

    We have written the Exclusive Hadronic Monte Carlo Event (ExHuME) generator. ExHuME is based around the perturbative QCD calculation of Khoze, Martin and Ryskin of the process pp→p+X+p, where X is a centrally produced colour singlet system. Program summaryTitle of program:ExHuME Catalogue identifier:ADYA_v1_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADYA_v1_0 Program obtainable from:CPC Program Library, Queen's University of Belfast, N. Ireland Licensing provisions:None Programming language used:C++, some FORTRAN Computer:Any computer with UNIX capability. Users should refer to the README file distributed with the source code for further details Operating system:Linux, Mac OS X No. of lines in distributed program, including test data, etc.:111 145 No. of bytes in distributed program, including test data, etc.: 791 085 Distribution format:tar.gz RAM:60 MB External routines/libraries:LHAPDF [ http://durpdg.dur.ac.uk/lhapdf/], CLHEP v1.8 or v1.9 [L. Lönnblad, Comput. Phys. Comm. 84 (1994) 307; http://wwwinfo.cern.ch/asd/lhc++/clhep/] Subprograms used:Pythia [T. Sjostrand et al., Comput. Phys. Comm. 135 (2001) 238], HDECAY [A. Djouadi, J. Kalinowski, M. Spira, HDECAY: A program for Higgs boson decays in the standard model and its supersymmetric extension, Comput. Phys. Comm. 108 (1998) 56, hep-ph/9704448]. Both are distributed with the source code Nature of problem:Central exclusive production offers the opportunity to study particle production in a uniquely clean environment for a hadron collider. This program implements the KMR model [V.A. Khoze, A.D. Martin, M.G. Ryskin, Prospects for New Physics observations in diffractive processes at the LHC and Tevatron, Eur. Phys. J. C 23 (2002) 311, hep-ph/0111078], which is the only fully perturbative model of exclusive production. Solution method:Monte Carlo techniques are used to produce the central exclusive parton level system. Pythia routines are then used to develop a realistic hadronic system

  2. L'effet Casimir : théorie et expériences

    NASA Astrophysics Data System (ADS)

    Lambrecht, A.; Genet, C.; Intravaia, F.; Reynaud, S.

    2004-11-01

    L'existence de fluctuations irréductibles de champ dans le vide est une prédiction importante de la théorie quantique. Ces fluctuations ont de nombreuses conséquences observables comme l'effet Casimir, qui est maintenant mesuré avec une bonne précision et un bon accord avec la théorie, pourvu que celle-ci tienne compte des différences entre les expériences rélles et la situation idéale considérée par H.G.B. Casimir. Nous présenterons quelqu'unes des expériences récentes et discuterons les principales corrections à la force de Casimir liées à la situation expérimentale.

  3. Reduction/Transformation Operators

    SciTech Connect

    Bartlett, Roscoe A.

    2006-09-01

    RTOp (reduction/transformation operators) is a collection of C++ software that provides the basic mechanism for implementinig vector operations in a flexible and efficient manner. This is the main interface utilized by Thyra to allow for the specification of specific vector reduction and/or transformation operations. The RTOp package contains three different types of software. (a) a small number of interoperability interfaces. (b) support software including code for the parallel SPMD mode based on only Teuchos::Comm(and not MPl directly(, and (c) a library of pre-implemented RTOp subclasses for everything from simple AXPYs and norms, to more specialized vector operations. RTOp allows an algorithm developer to implement their own RTOp subclasses in a way that is independent from any specific serial, parallel, out-of-core or other type of vector implementation. RTOp is a required package by Thyra and MOOCHO. (c)

  4. A note on an interaction between Rhinopithecus bieti and a buzzard at Baima Snow Moutain.

    PubMed

    Cui, Liang-Wei

    2003-01-01

    Predation avoidance relies primarily on behavioural mechanisms [van Schaik and van Hooff, 1983]. Primates alarm call at predators, including most birds and mammals [Cheney and Wrangham, 1987]. Alarm calls could be used to signal to the predator that it has been spotted [Zuberbühler et al., 1999], thereby probably decreasing the likelihood of an attack [Schultz, 2001], and they also inform prey of the presence of the predator, thereby increasing overall attention levels [Schülke, 2001]. Although eagles are reported to be one of the predators of Rhinopithecus bieti [Bai et al., 1987], few interactions between these monkeys and raptors have been documented to date. Here I document an interaction witnessed between R. bieti and a buzzard [Buteo sp., Yang X-J, pers. comm.]. PMID:12606851

  5. Molecular structure of Si_xS_(1-x) glasses

    NASA Astrophysics Data System (ADS)

    Wang, Y.; Boolchand, P.

    2000-03-01

    Bulk Si_xS_1-x glasses in the 0.15Comm. 111, 619(1999)). Glass transition temperatures established by T-modulated DSC show an increase with x. Results of Raman and MDSC will be correlated, and discussed in relation to the nature of stiffness transitions anticipated in this binary glass system near x ~0.20.

  6. ARVO-CL: The OpenCL version of the ARVO package — An efficient tool for computing the accessible surface area and the excluded volume of proteins via analytical equations

    NASA Astrophysics Data System (ADS)

    Buša, Ján; Hayryan, Shura; Wu, Ming-Chya; Buša, Ján; Hu, Chin-Kun

    2012-11-01

    Introduction of Graphical Processing Units (GPUs) and computing using GPUs in recent years opened possibilities for simple parallelization of programs. In this update, we present the modernized version of program ARVO [J. Buša, J. Dzurina, E. Hayryan, S. Hayryan, C.-K. Hu, J. Plavka, I. Pokorný, J. Skivánek, M.-C. Wu, Comput. Phys. Comm. 165 (2005) 59]. The whole package has been rewritten in the C language and parallelized using OpenCL. Some new tricks have been added to the algorithm in order to save memory much needed for efficient usage of graphical cards. A new tool called ‘input_structure’ was added for conversion of pdb files into files suitable for work with the C and OpenCL version of ARVO.

  7. Labeled line drawing of launch and entry suit identifies various components

    NASA Technical Reports Server (NTRS)

    1988-01-01

    Line drawings illustrate how a crewmember would be seated during space shuttle launch and entry in the mission specialist seat wearing the launch and entry suit (LES), a partial pressure suit. Front and profile drawings are labeled with numbers. The legend for the views includes: 1) Mission Specialist seat; 2) crewman; 3) helmet; 4) anti-exposure / counter pressure garment; 5) boots; 6) parachute harness; 7) parachute pack; 8) life raft with sea dye marker; 9) suit mounted oxygen (O2) manifold; 10) anti-gravity (anti-g) suit controller; 11) emergency O2 supply; 12) seawars; 13) ventilation fan; 14) orbiter O2 line; 15) headset interface unit (HIU); 16) communication (COMM) line to HIU; 17) flotation device. Crew escape system (CES) and LES was designed for STS-26, the return to flight mission, and subsequent missions.

  8. Que peut-on voir avec des neutrons? Une introduction pour des non spécialistes

    NASA Astrophysics Data System (ADS)

    Schweizer, J.

    2005-11-01

    Le neutron est une particule élémentaire qui a été découverte en 1932 par James Chadwick. Ses caractéristiques principales sont résumées dans le tableau I. Il a été utilisé pour la première fois par Clifford Shull en 1946 comme outil pour des expériences de diffusion. Cette technique s'est depuis constamment développée pour concerner tous les aspects de la matière condensée: physique, chimie, matériaux, biologie. Il s'agit d'un outil tout à fait exceptionnel car le neutron possède des propriétés uniques et particulièrement adaptées pour ces études.

  9. Helimagnetism in nanometer small bilayer iron islands (Presentation Recording)

    NASA Astrophysics Data System (ADS)

    Sander, Dirk

    2015-09-01

    We report a novel noncollinear magnetic order in individual nanostructures of a prototypical magnetic material, bilayer iron islands on Cu (111) [1]. Spin-polarized scanning tunnelling microscopy reveals a magnetic stripe phase with a period of 1.28 nm, which is identified as a one-dimensional helical spin order. Ab initio calculations reveal reduced-dimensionality-enhanced long-range antiferromagnetic interactions as the driving force of this spin order. Our findings point at the potential of nanostructured magnets to establish noncollinear magnetic order in a nanostructure, which is magnetically decoupled from the substrate. [1] S.H. Phark, J.A. Fischer, M. Corbetta, D. Sander, K. Nakamura, J. Kirschner, Nature Comm. 5, 5183 (2014).

  10. Rovibrational excitation of H2 and HD due to H: the contribution of reactive scattering

    NASA Astrophysics Data System (ADS)

    Watson Cook, Alexander; Yang, Benhui H.; Stancil, Phillip C.; Forrey, Robert C.; Naduvalath, Balakrishnan

    2016-06-01

    Utilizing the hyperspherical method as implemented in the ABC computational suite of codes (Skouteris et al. 2000), the time-independent Schroedinger equation is solved for the reactive and inelastic scattering probabilities for interactions between hydrogen and its isotopes, particularly H, H2, and HD. A high quality potential energy surface (Miekle et all 2002) was adopted in the scattering Hamiltonian construction. Additionally, we aim to explore uses of GPU-centric computing to increase the efficiency of this method (Baraglia et al.) in order to obtain collisional rate coefficients for the full range of rovibrationally excited H2 and HD, extending the recent study of Lique (2015).Baraglia, R. et al. 2011, in Computational Science and Its ApplicationsLique, F. 2015, MNRAS, 453, 810Mielke, S. L. et al., 2002, J. Chem. Phys., 116, 4142Skouteris, D. et al., 2000, Comp. Phys. Comm., 133, 128The work at UGA is partially support by grant HST-AR-13899.

  11. Une vie active saine pour les enfants et les adolescents

    PubMed Central

    2002-01-01

    De mauvais modes de vie, comme une alimentation malsaine et l’inactivité physique, sont d'importants facteurs contributifs à une augmentation de la morbidité et de la mortalité secondaires à des maladies chroniques à l’âge adulte. Depuis dix ans, on remarque une augmentation du mode de vie sédentaire et de l’obésité chez les enfants et les adolescents, tant en Amérique du Nord qu’ailleurs dans le monde. Les médecins doivent être conscients de l’importance du problème, fournir des conseils de prévention aux familles et promouvoir une vie active saine dans leur pratique.

  12. Anticipatory lip gestures: a validation of the Movement Expansion Model in congenitally blind speakers.

    PubMed

    Ménard, Lucie; Cathiard, Marie-Agnès; Dupont, Sophie; Tiede, Mark

    2013-04-01

    In this paper, anticipatory co-articulation of the lip protrusion and constriction gestures is investigated in speakers with visual deprivation. Audio-visual recordings of 11 congenitally blind French speakers producing [V-roundC-roundV+round] sequences were measured with a lip shape tracking system. Lip protrusion and constriction values and their relative timings were analyzed. Results show that despite the reduced magnitude of lip protrusion and constriction area in blind speakers, the timing of the anticipatory gestures can be appropriately modeled by the Movement Expansion Model [from Abry and Lallouache (1995a). Bul. de la Comm. Parlée 3, 85-99; (1995b). Proceedings of ICPHS, pp. 152-155; Noiray et al. (2011). J. Acoust. Soc. Am. 129, 340-349], which predicts lawful anticipatory behavior expanding linearly as the intervocalic consonant interval increases. PMID:23556687

  13. Copernicus POD Service Operations

    NASA Astrophysics Data System (ADS)

    Fernandez, Jaime; Escobar, Diego; Ayuga, Francisco; Peter, Heike; Femenias, Pierre

    2015-12-01

    The Copernicus POD (Precise Orbit Determination) Service is part of the Copernicus PDGS Ground Segment of the Sentinel missions. A GMV-led consortium is operating the Copernicus POD Service (CPOD) being in charge of generating precise orbital products and auxiliary data files for their use as part of the processing chains of the respective Sentinel PDGS (Payload Data Ground Segment). This paper describes the CPOD Service and presents the current status operating Sentinel-1A and its readiness to support the Sentinel-2A and in particular Sentinel-3A incoming Commissioning Phases, with an especial emphasis on describing the Calibration and Validation (Cal/Val) activities to be performed during the Comm. Phase. Then, it is shown how the quality of the orbital products is guaranteed through external validation activities and the role of the Copernicus POD QWG (Quality Working Group).

  14. SBIR Technology Applications to Space Communications and Navigation (SCaN)

    NASA Technical Reports Server (NTRS)

    Liebrecht, Phil; Eblen, Pat; Rush, John; Tzinis, Irene

    2010-01-01

    This slide presentation reviews the mission of the Space Communications and Navigation (SCaN) Office with particular emphasis on opportunities for technology development with SBIR companies. The SCaN office manages NASA's space communications and navigation networks: the Near Earth Network (NEN), the Space Network (SN), and the Deep Space Network (DSN). The SCaN networks nodes are shown on a world wide map and the networks are described. Two types of technologies are described: Pull technology, and Push technologies. A listing of technology themes is presented, with a discussion on Software defined Radios, Optical Communications Technology, and Lunar Lasercom Space Terminal (LLST). Other technologies that are being investigated are some Game Changing Technologies (GCT) i.e., technologies that offer the potential for improving comm. or nav. performance to the point that radical new mission objectives are possible, such as Superconducting Quantum Interference Filters, Silicon Nanowire Optical Detectors, and Auto-Configuring Cognitive Communications

  15. Theory of quantum kagome ice

    NASA Astrophysics Data System (ADS)

    Huang, Yi-Ping; Hermele, Michael

    Some pyrochlore oxides realize novel dipolar-octupolar (DO) doublets on the sites of the pyrochlore lattice of corner-sharing tetrahedra. With magnetic field along the (111) direction, such systems can approximately be described as decoupled layers of a S =1/2 XYZ model on Kagome planes, with perpendicular magnetic field. A recent quantum Monte Carlo study found a zero temperature disordered phase in this model, dubbed quantum kagome ice, and proposed that it is a type of Z2 quantum spin liquid (J. Carrasquilla, Z. Hao and R. G. Melko, Nat. Comm., 6, 7421). We will describe an effective theory for this putative Z2 spin liquid, and present results on its symmetry fractionalization and resulting properties that may be tested in future numerical simulations. the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) under Award # DE-SC0014415.

  16. Locomotion of a microorganism in weakly viscoelastic liquids

    NASA Astrophysics Data System (ADS)

    De Corato, M.; Greco, F.; Maffettone, P. L.

    2015-11-01

    In the present work we study the motion of microorganisms swimming by an axisymmetric distribution of surface tangential velocity in a weakly viscoelastic fluid. The second-order fluid constitutive equation is used to model the suspending fluid, while the well-known "squirmer model" [M. J. Lighthill, Comm. Pure Appl. Math. 5, 109 (1952), 10.1002/cpa.3160050201; J. R. Blake, J. Fluid Mech. 46, 199 (1971), 10.1017/S002211207100048X] is employed to describe the organism propulsion mechanism. A regular perturbation expansion up to first order in the Deborah number is performed, and the generalized reciprocity theorem from Stokes flow theory is then used, to derive analytical formulas for the squirmer velocity. Results show that "neutral" squirmers are unaffected by viscoelasticity, whereas "pullers" and "pushers" are slowed down and hastened, respectively. The power dissipated by the swimming microorganism and the "swimming efficiency" are also analytically quantified.

  17. Accuracy Analysis of the PIC Method

    NASA Astrophysics Data System (ADS)

    Verboncoeur, J. P.; Cartwright, K. L.

    2000-10-01

    The discretization errors for many steps of the classical Particle-in-Cell (PIC) model have been well-studied (C. K. Birdsall and A. B. Langdon, Plasma Physics via Computer Simulation, McGraw-Hill, New York, NY (1985).) (R. W. Hockney and J. W. Eastwood, Computer Simulation Using Particles, McGraw-Hill, New York, NY (1981).). In this work, the errors in the interpolation algorithms, which provide the connection between continuum particles and discrete fields, are described in greater detail. In addition, the coupling of errors between steps in the method is derived. The analysis is carried out for both electrostatic and electromagnetic PIC models, and the results are demonstrated using a bounded one-dimensional electrostatic PIC code (J. P. Verboncoeur et al., J. Comput. Phys. 104, 321-328 (1993).), as well as a bounded two-dimensional electromagnetic PIC code (J. P. Verboncoeur et al., Comp. Phys. Comm. 87, 199-211 (1995).).

  18. Contributions a l'etude des lidars a champs visuels multiples

    NASA Astrophysics Data System (ADS)

    Roy, Gilles

    On presente un modele, base sur la diffraction et l'optique geometrique, liant les signaux lidar a champs multiples a la densite de distribution de la taille des particules. On ecrit la relation sous forme matricielle ce qui permet d'obtenir la densite de distribution apparente de la taille des particules par inversion matricielle avec contrainte. On interprete la perturbation causee par la contribution de l'optique geometrique au signal lidar comme de la diffraction causee par une particule de diametre d'environ un micron. La densite de distribution apparente est corrigee a posteriori en calculant la contribution relative des differents ordres de diffusion a l'elargissement de la fonction de phase des particules. La validite du modele est supportee par des simulations Monte Carlo et par des resultats experimentaux obtenus sous des conditions controlees. Finalement, on applique avec succes, la technique d'inversion aux mesures lidar multichamps obtenues sur des nuages.

  19. A repeating source of infrasound from the Wells, Nevada earthquake sequence

    SciTech Connect

    Arrowsmith, Stephen J.; Whitaker, Rod; Randall, George; Burlacu, Relu

    2009-01-01

    The Wells, Nevada earthquake of February 21, 2008, generated a complex seismoacoustic wakefield. In addition to epicentral infrasound, the earthquake triggered a secondary source of infrasound, which was also initiated by subsequent aftershocks. By applying simple constraints on the propagation of seismic and infrasound waves, we show that the secondary source is an isolated peak that appears to efficiently generate infrasound through the interaction with seismic surface waves. By measuring peak-to-peak amplitudes of epicentral and secondary arrivals and correcting them for the effects of distance and winds, we find that epicentral arrivals lit with empirical relationships of Mutschlecner and Whitaker (2005) and Le Pichon et al. (2006), which form the basis for a proposed infrasound discriminant (Anderson et al., Pers. Comm.). In contrast, the secondary arrivals are much higher in amplitude, highlighting the importance of being able to separate epicentral and secondary arrivals for infrasonic event discrimination.

  20. First-Principles Theoretical Investigation of Neutral Vacancy-Associated Muonium Center in Silicon

    NASA Astrophysics Data System (ADS)

    Li, Hong; Nandini Usha Roy, Alok; Sahoo, N.; Das, T. P.; Scheuermann, R.; Nagamine, K.

    2000-03-01

    First-principles Hartree-Fock Cluster investigation has been carried out on the vacancy associated center MuV in silicon (B. Beck Nielsen et al, Phys. Rev. Lett. \\underline79, 1507 (1997)) and V_H, its H counterpart (M. Schefzik et al, Sol. St. Comm. \\underline107, 395 (1998)), using the cluster Si_4H_12Mu involving muonium and the four silicon neighbors nearest to the vacancy. Lattice relaxation effects are included. Our results explain the observed non-axial symmetry through Jahn-Teller distortion and provide reasonable quantitative agreement with experimental hyperfine data. The influence of using larger clusters and vibrational motion of the muon is being studied and results will be reported.

  1. Protection des ions organiques contre les dommages induits a l'ADN par les electrons de basse energie

    NASA Astrophysics Data System (ADS)

    Dumont, Ariane

    Il a ete demontre que les electrons de basse energie (EBE) peuvent induire des cassures simple brin (CSB) a l'ADN, via la formation d'anions transitoires qui decroissent par attachement dissociatif, ou dans d'autres etats electroniques dissociatifs menant a la fragmentation. Afin d'effectuer une etude complete des effets des electrons de basse energie sur la matiere biologique, il est necessaire de comprendre leur mecanismes d'interaction non seulement avec l'ADN, mais avec les constituants de son environnement. Les histones sont une composante importante de l'environnement moleculaire de l'ADN. Leur charge positive leur permet de s'associer aux groupements phosphate anionique de l'ADN. Le role principal de ces proteines basiques consiste a organiser l'ADN et l'empaqueter afin de former la chromatine. Les cations sont une autre composante importante de la cellule; ils jouent un role dans la stabilisation de la conformation B de l'ADN in vitro par leurs interactions avec les petits et grands sillons de l'ADN, ainsi qu'avec le groupement phosphate charge negativement. Avec les histones, ils participent egalement a la compaction de l'ADN pour former la chromatine. Cette etude a pour but de comprendre comment la presence d'ions organiques (sous forme de Tris et d'EDTA) a proximite de l'ADN modifie le rendement de cassures simple brin induit par les electrons de basse energie. Le Tris et l'EDTA ont-ete choisis comme objet d'etude, puisqu'en solution, ils forment le tampon standard pour solubiliser l'ADN dans les experiences in vitro (10mM Tris, 1mM EDTA). De plus, la molecule Tris possede un groupement amine alors que l'EDTA possede 4 groupements carboxyliques. Ensembles, ils peuvent se comporter comme un modele simple pour les acides amines. Le ratio molaire de 10 :1 de Tris par rapport a l'EDTA a pour but d'imiter le comportement des histones qui sont riches en arginine et lysine, acides amines possedant un groupement amine charge positivement additionnel. Des films d

  2. Structural, electronic transport and magnetoresistance of a 142nm lead telluride nanowire synthesized using stress-induced growth

    SciTech Connect

    Dedi E-mail: cheny2@phys.sinica.edu.tw; Chien, Chia-Hua; Hsiung, Te-Chih; Chen, Yu-Chieh; Huang, Yi-Cheng; Lee, Ping-Chung; Chen, Yang-Yuan E-mail: cheny2@phys.sinica.edu.tw; Lee, Chih-Hao

    2014-05-15

    In this study, structurally uniform single crystalline PbTe nanowires (NWs) were synthesized using a stress-induced growth. Selected-area electron diffraction patterns show that the PbTe NWs were grown along the [100] direction. The electrical conductivity σ of a NW with 142 nm in diameter exhibited a semiconducting behavior at 50–300 K. An enhancement of electrical conductivity σ up to 2383 S m{sup −1} at 300 K is much higher than σ [0.44–1526 S m{sup −1}, Chen et al., Appl. Phys. Lett. 103, p023115, (2013)] in previous studies. The room temperature magnetoresistance of the 142 nm NW was ∼0.8% at B = 2 T, which is considerably higher than that [0.2% at B = 2 T, Ovsyannikov et al., Sol. State Comm. 126, 373, (2003)] of the PbTe bulk reported.

  3. La fragilité

    PubMed Central

    Lee, Linda; Heckman, George; Molnar, Frank J.

    2015-01-01

    Résumé Objectif Aider les médecins de famille à mieux reconnaître la fragilité et ses répercussions sur la prise en charge des patients âgés. Sources des données Une recension a été effectuée dans PubMed-MEDLINE de 1990 à 2013 pour trouver des articles rédigés en anglais exclusivement, à l’aide des groupes suivants de mots clés et d’en-têtes MeSH : frail elderly, frail, frailty; aged, geriatrics, geriatric assessment, health services for the aged; primary health care, community health services et family practice. Message principal La fragilité est fréquente, en particulier chez les personnes âgées atteintes de maladies chroniques complexes comme l’insuffisance cardiaque et la bronchopneumopathie chronique obstructive. De nouvelles données probantes démontrent l’importance de la fragilité comme facteur de prédiction d’issues indésirables chez les personnes plus âgées. Quoiqu’on ne s’entende actuellement pas sur les meilleures façons d’évaluer et de diagnostiquer la fragilité en soins primaires, des marqueurs individuels de la fragilité comme la lenteur de la démarche offrent des moyens pratiques prometteurs de dépister la fragilité. La détection de la fragilité en soins primaires peut offrir la possibilité de retarder la progression de la fragilité au moyen d’interventions proactives comme l’exercice. La reconnaissance de l’existence de la fragilité peut orienter un counseling approprié et la prise de mesures préventives anticipatoires pour les patients lorsqu’on envisage des interventions médicales. Elle peut aussi aider à cerner des problèmes concomitants qui contribuent à la fragilité et l’influencent et à en optimiser la prise en charge. Les recherches futures devraient se pencher sur la détermination de moyens pratiques et efficaces pour évaluer et prendre en charge de manière appropriée ces patients vulnérables au niveau des soins primaires. Conclusion En dépit de son importance

  4. Coping Styles, Health Status and Advance Care Planning in Patients with Hematologic Malignancies

    PubMed Central

    Loberiza, Fausto R; Swore-Flecther, Barbara A.; Block, Susan D.; Back, Anthony L.; Goldman, Roberta E.; Tulsky, James A.; Lee, Stephanie J.

    2014-01-01

    This study evaluated if measures of psychological well-being, including coping style are associated with advance care planning (ACP). Data were from the HEMA-COMM study, a prospective observational study of physician-patient communication in patients with hematologic malignancies. ACP was defined as having a living will, having a health care proxy, discussing life support with family or friends, and discussing life support with a doctor or nurse. 293 patients participated: only 45 (15%) had all the elements of ACP, 215 (73%) had at least 1 element of ACP, while 33 (11%) did not engage in ACP. In multivariate analysis, specific coping styles but not other measures of psychosocial well being were associated with having written ACP. Verbal ACP was associated with patient-reported health and physician estimate of life expectancy. Our study suggests that tailoring ACP discussions to a patient’s coping style may increase engagement in ACP. PMID:21851220

  5. Pneumomédiastin au cours d'une dermatomyosite, une entité rare: à propos d'un cas

    PubMed Central

    Majdoub, Senda; Zemni, Houcem; Zaghouani, Houneida; Salem, Halima Houda Ben; Amara, Habib; Bakir, Dajla; Kraeim, Chakib

    2016-01-01

    la dermatomyosite est une connective caractérisée par une inflammation du muscle squelettique associée à des manifestations cutanées caractéristiques. Leurs étiologies, encore méconnues, associent facteurs environnementaux et génétiques. Parmi les complications pulmonaires décrites, les pneumopathies interstitielles qui sont des complications fréquentes. D'autres complications sont plus rarement rapportées comme le pneumomédiastin. Nous rapportons une observation de pneumomédiastin avec dissection aérique sous cutanée massive survenus chez une patiente atteinte de dermatomyosite. Nous discutons, à la vue des données de la littérature de la fréquence, des causes et des mécanismes physiopathologiques de cette pathologie. PMID:27200145

  6. Enhanced magnetization in ultrathin manganite layers via structural ``delta-doping'' of octahedral rotations

    NASA Astrophysics Data System (ADS)

    Moon, Eun Ju; Kirby, Brian J.; May, Steven J.

    The design of rotations and distortions of the corner-shared BO6 octahedra has emerged as an exciting platform to control electronic or magnetic behavior in ABO3 perovskite heterostructures. Recent work has shown that purely structural effects can be used to spatially confined magnetism in oxide heterostructures and point to the design of rotational gradients as routes to realize novel electronic or ferroic states in oxide superlattices [Nat. Comm. 5, 5710 (2014)]. Here, we demonstrate a structural ``delta doping'' approach for controlling magnetism in ultrathin layers within isovalent manganite superlattices. Polarized neutron reflectivity and temperature dependent magnetization measurements are used to correlate enhanced magnetization with local regions of suppressed octahedral rotations in the heterostructures. This work was supported by the U. S. Army Research Office under Grant No. W911NF-15-1-0133.

  7. The Commtech Methodology: A Demand-Driven Approach to Efficient, Productive, and Measurable Technology Transfer and Commercialization

    NASA Technical Reports Server (NTRS)

    Horsham, Gary A. P.

    1999-01-01

    This paper presents a comprehensive review and assessment of a demonstration technology transfer and commercialization prouram called "CommTech". The pro-ram was conceived and initiated in early to mid-fiscal year 1995, and extended roughly three years into the future. Market research sources were used to initially gather primary technological problems and needs data from non-aerospace companies in three targeted industry sectors: environmental, surface transportation, and bioengineering. Company-supplied information served as input data to activate or start-up an internal, phased matchmaking process. This process was based on technical-level relationship exploration followed by business-level agreement negotiations. and culminated with project management and execution. Space Act Agreements represented near-term outputs. Company product or process commercialization derived from NASA Glenn support and measurable economic effects represented far-term outputs.

  8. Le fibromatosis colli ou torticolis congénital: son diagnostic et sa prise en charge à propos de deux cas

    PubMed Central

    Tchaou, Mazamaesso; Pegbessou, Plaodezina Essobozou; Sonhaye, Lantam; Ahouanssou, Patricia Yékpé; Amadou, Abdoulatif; Kolou, Beresa; Kama, Lidi Bessi; Garba, Nouhou Mahamadou; Koussema, Lama Kegdigoma Agoda; N'dakéna, Koffi

    2015-01-01

    Le fibromatosis colli (FC) est pseudotumeur rare du muscle sterno-cléido-mastoïdien (SCM), à l'origine d'un torticolis dit congénital chez le nouveau-né ou le nourrisson. Le mécanisme étio-pathogénique de sa survenue est sujet à controverse. Son diagnostic fait appel à l’échographie qui permet de mettre en évidence un épaississement caractéristique du muscle. Nous rapportons deux cas diagnostiqués par l’échographie avec pour un cas une notion de malposition intra-utérine et pour l'autre cas une absence totale de malposition et de traumatisme obstétrical qui pourtant est évoqué comme élément du mécanisme de survenue du FC. PMID:26834927

  9. Les infections à Pseudomonas aeruginosa au service des maladies infectieuses du CHU YO, Burkina Faso: à propos deux cas

    PubMed Central

    Mamoudou, Savadogo; Lassina, Dao; Fla, Koueta

    2015-01-01

    Nous rapportons deux cas d'infection à Pseudomonas aeruginosa: un cas de méningite et un cas d'infection urinaire. Les auteurs rappellent qu’à côté des étiologies classiques des méningites et des infections urinaires, des germes résistants comme Pseudomonas aeruginosa peuvent être responsables d'infections à localisation méningées et urinaires et dont il faut connaître pour une bonne prise en charge. Le traitement de ces infections requiert un antibiogramme au regard de la grande capacité de résistance de Pseudomonas aeruginosa en milieu hospitalier. La limitation des gestes invasifs et l'application rigoureuse des mesures de prévention des infections en milieu hospitalier contribueront à lutter efficacement contre ces infections en milieu de soins. PMID:26491521

  10. Perturbation Theory for Parent Hamiltonians of Matrix Product States

    NASA Astrophysics Data System (ADS)

    Szehr, Oleg; Wolf, Michael M.

    2015-05-01

    This article investigates the stability of the ground state subspace of a canonical parent Hamiltonian of a Matrix product state against local perturbations. We prove that the spectral gap of such a Hamiltonian remains stable under weak local perturbations even in the thermodynamic limit, where the entire perturbation might not be bounded. Our discussion is based on preceding work by Yarotsky that develops a perturbation theory for relatively bounded quantum perturbations of classical Hamiltonians. We exploit a renormalization procedure, which on large scale transforms the parent Hamiltonian of a Matrix product state into a classical Hamiltonian plus some perturbation. We can thus extend Yarotsky's results to provide a perturbation theory for parent Hamiltonians of Matrix product states and recover some of the findings of the independent contributions (Cirac et al in Phys Rev B 8(11):115108, 2013) and (Michalakis and Pytel in Comm Math Phys 322(2):277-302, 2013).

  11. Blending resources to teach high school level astronomy

    NASA Astrophysics Data System (ADS)

    Rudiger, Lance

    This presentation will assist educators in incorporating various resources into a High School Level Astronomy course. I will use information and materials (slides, videos and handouts). I will share information I have gained as a mentor teacher in programs for NASA (JPL Solar System Ambassador), NRAO (National Radio Astronomy Observatory), AAS (American Astronomical Society Teacher Resource Agent and Leader workshop) and NYSUT State Science Comm. I will also present materials and information from workshops I have given at the SUNY@Potsdam Planetarium for educators, community members and students. I will also share a space science summer program I developed for Upward Bound at St. Lawrence University. This was mostly for Native Americans or economically disadvantaged.

  12. Biostereometrics In Art

    NASA Astrophysics Data System (ADS)

    Ferenc, Kovats

    1986-07-01

    Desuis mon enfance je suis un type soidisant visuel. Cette deviation etait toujours profitable pour moi, pour le clinicien , ainsi que pour le rechercheur scientifique.I1 y a trente ans, que dans l'Atlas Radioanatomique du Thorax nous avons deja utilis6 la conception de trois dimensions. Dans les derni6res edition de cet ouvrage nous avons travaille mke avec la guatrieme, le temps facteur. DePuis cette 6poque-la je me suis ori-en-be vers les quatre dimensions, vers les mouvements dans l'espace et le temps. -:tudiant les mouvements,les mouvements ventilatoires mesure par photogrammetrie le tronc humain.En projetant sur la surface du tronc un reseau quadratique, on pent compter de 3oo-400 points d'information, si un carre est 2 This 2 cm. Simultanement on pent ainsi contraler les deplacement relatifs des differents points. Travaillant avec seriophotographie et ces dernieres annees avec Video, nous avons des documents cDntinuellement en trois dimensions sun la position actuelle en espace de notre modele.On pent mesurer, reproduire la position momentan6e du sujet d'une frequence et dans la quantite desiree. Par exemple on peut les reproduire, une a une, comme une sculpture, en domontrant les changements d'un tronc humain pendant les mouvements respiratoires, comme nous avions fait en 1969 avec le sculpteur Istvan Bencsik en realisant nos differents modeles en inspiration et expiration.flais thooriquement on pent construire tant de sculptures qu'on vent entre les deux positions extremes.La methode est tres utilisable pour l'observation des mouvements sportifs on artistiques, comme le ballet par exemple. / Figure 1./ En etudiant en plusieures series la morphometrie des mouvements respiratoires on pent acquerir une certain experience, qui concerne la phase de respiration, on se trouve un corps humain sculpte, dessine on peint. Come le mimique d'un visage explkue toujours l'6tat affectif d'un individu, le corps humain peut expliquer tart des chases entre les mains d

  13. Image Display in Local Database Networks

    NASA Astrophysics Data System (ADS)

    List, James S.; Olson, Frederick R.

    1989-05-01

    Dearchival of image data in the form of x-ray film provides a major challenge for radiology departments. In highly active referral environments such as tertiary care hospitals, patients may be referred to multiple clinical subspecialists within a very short time. Each clinical subspecialist frequently requires diagnostic image data to complete the diagnosis. This need for image access often interferes with the normal process of film handling and interpretation, subsequently reducing the efficiency of the department. The concept of creating a local image database on individual nursing stations utilizing the AT&T CommView Results Viewing Station (RVS) is being evaluated. Initial physician acceptance has been favorable. Objective measurements of operational productivity enhancements are in progress.

  14. QUANTUM CONTROL OF LIGHT: From Slow Light and FAST CARS to Nuclear γ-ray Spectroscopy

    NASA Astrophysics Data System (ADS)

    Scully, Marlan

    2007-06-01

    In recent work we have demonstrated strong coherent backward wave oscillation using forward propagating fields only. This surprising result is achieved by applying laser fields to an ultra-dispersive medium with proper chosen detunings to excite a molecular vibrational coherence that corresponds to a backward propagating wave [PRL, 97, 113001 (2006)]. The physics then has much in common with propagation of ultra-slow light. Applications of coherent scattering and remote sensing to the detection of bio and chemical pathogens (e.g., anthrax) via Coherent Anti-Raman Scattering together with Femtosecond Adaptive Spectroscopic Techniques (FAST CARS [Opt. Comm., 244, 423 (2005)]) will be discussed. Furthermore, the interplay between quantum optics (Dicke super and sub-radiant states) and nuclear physics (forward scattering of γ radiation) provides interesting problems and insights into the quantum control of scattered light [PRL, 96, 010501 (2005)].

  15. Reduction/Transformation Operators

    Energy Science and Technology Software Center (ESTSC)

    2006-09-01

    RTOp (reduction/transformation operators) is a collection of C++ software that provides the basic mechanism for implementinig vector operations in a flexible and efficient manner. This is the main interface utilized by Thyra to allow for the specification of specific vector reduction and/or transformation operations. The RTOp package contains three different types of software. (a) a small number of interoperability interfaces. (b) support software including code for the parallel SPMD mode based on only Teuchos::Comm(and notmore » MPl directly(, and (c) a library of pre-implemented RTOp subclasses for everything from simple AXPYs and norms, to more specialized vector operations. RTOp allows an algorithm developer to implement their own RTOp subclasses in a way that is independent from any specific serial, parallel, out-of-core or other type of vector implementation. RTOp is a required package by Thyra and MOOCHO. (c)« less

  16. Linux-PC based 1024-Channel Transient Digitizer System for the DRIFT Experiment Acquisition System

    NASA Astrophysics Data System (ADS)

    Ayad, R.; Hanson-Hart, Z.; Hyatt, M.; Katz-Hyman, M.; Maher, P.; Martoff, C. J.; Posner, A.; Freytag, D.; Freytag, M.; Haller, G.; Nelson, D.

    2003-04-01

    The DRIFT Experiment [1] is an underground search for WIMP Dark Matter using a novel detector invented for this purpose: the Negative Ion TPC (NITPC). The data acquisition system for DRIFT had to allow acquisition of long duration time digitized data from the 1024 analog channels at an affordable price. This was accomplished with a system based on a Linux PC, the Comedi [2] open-source device driver software, the inexpensive PCI-DIO-32HS National Instruments high speed digital I/O board, and custom 32-channel preamp+digitizer boards built at SLAC. System architecture, testing, and performance will be discussed, as well as further upgrade plans. [1] Low Pressure Negative Ion TPC for Dark Matter Search. D. P. Snowden-Ifft, C. J. Martoff, J. M. Burwell, Phys Rev. D. Rapid Comm. 61, 101301 (2000) [2] Comedi: linux Control and MEasurement Device Interface : http://stm.lbl.gov/comedi/

  17. 757 Path Loss Measurements

    NASA Technical Reports Server (NTRS)

    Horton, Kent; Huffman, Mitch; Eppic, Brian; White, Harrison

    2005-01-01

    Path Loss Measurements were obtained on three (3) GPS equipped 757 aircraft. Systems measured were Marker Beacon, LOC, VOR, VHF (3), Glide Slope, ATC (2), DME (2), TCAS, and GPS. This data will provide the basis for assessing the EMI (Electromagnetic Interference) safety margins of comm/nav (communication and navigation) systems to portable electronic device emissions. These Portable Electronic Devices (PEDs) include all devices operated in or around the aircraft by crews, passengers, servicing personnel, as well as the general public in the airport terminals. EMI assessment capability is an important step in determining if one system-wide PED EMI policy is appropriate. This data may also be used comparatively with theoretical analysis and computer modeling data sponsored by NASA Langley Research Center and others.

  18. Corps étranger de l'urètre et dépression mélancolique, les implications diagnostiques aux urgences-à propos d'un cas clinique

    PubMed Central

    Chouaib, Ali; Cabanis, Patrick; Billebaud, Thierry

    2011-01-01

    L'auto-insertion de corps étrangers dans l'urètre, est un comportement d'automutilation potentiellement dangereux. Plusieurs cas d'auto-insertion de corps étrangers dans l'urètre, ont été rapportés dans la littérature. Ceci est parfois dû à un trouble mental qui peut être méconnu et doit être systématiquement recherché par l'urologue. Si la notion d'automutilation et/ou les idées suicidaires ne sont pas recherchées dans le milieu hospitalier, et le patient s'automutile ou se suicide par la suite, l'urologue peut être poursuivi en justice pour absence de diagnostic et de traitement, pouvant être interprétés comme erreur médicale. PMID:22355424

  19. Hémangioendothéliome épithélioïde de la cuisse: à propos d'un cas

    PubMed Central

    Bardouni, Ahmed; Elouakili, Issam; Ouchrif, Younes; Ouakrim, Redouane; Kharmaz, Mohammed; Lamrani, Omar; Ismael, Farid; Lahlou, Abdo; Ouadaghirie, Mohammed; Mahfoud, Mustapha; Berrada, Mohammed Saleh; El Yaacoubi, Mouradh

    2014-01-01

    L'hémangioendothéliome épithélioïde (HEE) est une tumeur vasculaire à malignité intermédiaire survenant essentiellement dans l'os, les tissus mous, le poumon et le foie. Souvent considéré comme une tumeur à malignité intermédiaire entre les hémangiomes bénins et les angiosarcomes agressifs, l'HEE comporte un potentiel de récidives locales, de métastases ganglionnaires et à distance et ne s'accompagne pas fréquemment de décès. Les auteurs rapportent l'observation d'un patient de 70 ans, Ayant présenté un hémangioendothéliomeépithélioïde des parties molles de la cuisse avec un recul de 1an sans récidive. PMID:25404966

  20. Commission 19: Rotation of the Earth

    NASA Astrophysics Data System (ADS)

    Brzezinski, Aleksander; Ma, Chopo; Dehant, Véronique; Defraigne, Pascale; Dickey, Jean O.; Huang, Cheng-Li; Souchay, Jean; Vondrák, Jan; Charlot, Patrick; Richter, Bernd; Schuh, Harald

    The Commission supports and coordinates scientific investigations in the Earth rotation and related reference frames. Several changes had been introduced to the structure of Commission 19 since the IAU XXVI General Assembly in Prague, 2006. The Organizing Committee of Commission 19 has been substantially reduced. It consists now of six ex-officio members, the Commission president, vice-president, past president and representatives from the International Association of Geodesy (IAG), International Earth Rotation and Reference Systems Service (IERS), International VLBI Service for Geodesy and Astrometry (IVS), and five members at-large who are nominated by the OC, selected by the Commission members and elected by the IAU GA for a maximum of two terms. The modified terms of reference of Commission 19, the list of members and other details can be found at the Commission website comm19.cbk.waw.pl/>.

  1. Hyperemesis gravidarum avec troubles ioniques sévères: à propos d'un cas

    PubMed Central

    Jarraya, Anouar; Elleuch, Sahar; Zouari, Jawhar; Trigui, Khaled; Sofiene, Abidi; Smaoui, Mohamed; Kolsi, Kamel

    2015-01-01

    L'hyperemesis gravidarum s'accompagne habituellement d'une perte de poids, d'une acétonurie et de troubles hydro-électrolytiques comme il peut également s'accompagner d'anomalies du bilan hépatique. Nous rapportons un cas de vomissements gravidiques à 10 semaines d'aménorrhée non traité et vu tardivement avec des troubles ioniques sévères associés à des répercussions cliniques dans un contexte de cytolyse, de cholestase et d'insuffisance rénale aigue. Ce cas a bien répondu au traitement médical. PMID:26161187

  2. Collective mode formulation of the response algorithm for solving Kohn-Sham equations

    NASA Astrophysics Data System (ADS)

    Auer, J.; Krotscheck, E.

    2003-04-01

    We have developed a "collective mode" version of the response-iteration algorithm for solving the nonlinear Kohn-Sham equations. The algorithm utilizes approximation methods for the density-density response function that are known from microscopic many-body theories of strongly interacting Fermi systems. The major advantage over our previously proposed algorithm (J. Auer and E. Krotscheck, Comput. Phys. Comm. 118 (1999) 139-144) is that the new method needs the computation of occupied states only. Using spherical jellium clusters with up to 2000 electrons as an example, we show that the approximations implicit to our new algorithms do not deteriorate the convergence rate. An even simpler version approximates the density-density response function by that of a charged bose gas with the same density. This algorithm converges somewhat more slowly, but still provides a viable method for solving Kohn-Sham equations for small clusters.

  3. ``Models'' CAVEAT EMPTOR!!!: ``Toy Models Too-Often Yield Toy-Results''!!!: Statistics, Polls, Politics, Economics, Elections!!!: GRAPH/Network-Physics: ``Equal-Distribution for All'' TRUMP-ED BEC ``Winner-Take-All'' ``Doctor Livingston I Presume?''

    NASA Astrophysics Data System (ADS)

    Preibus-Norquist, R. N. C.-Grover; Bush-Romney, G. W.-Willard-Mitt; Dimon, J. P.; Adelson-Koch, Sheldon-Charles-David-Sheldon; Krugman-Axelrod, Paul-David; Siegel, Edward Carl-Ludwig; D. N. C./O. F. P./''47''%/50% Collaboration; R. N. C./G. O. P./''53''%/49% Collaboration; Nyt/Wp/Cnn/Msnbc/Pbs/Npr/Ft Collaboration; Ftn/Fnc/Fox/Wsj/Fbn Collaboration; Lb/Jpmc/Bs/Boa/Ml/Wamu/S&P/Fitch/Moodys/Nmis Collaboration

    2013-03-01

    ``Models''? CAVEAT EMPTOR!!!: ``Toy Models Too-Often Yield Toy-Results''!!!: Goldenfeld[``The Role of Models in Physics'', in Lects.on Phase-Transitions & R.-G.(92)-p.32-33!!!]: statistics(Silver{[NYTimes; Bensinger, ``Math-Geerks Clearly-Defeated Pundits'', LATimes, (11/9/12)])}, polls, politics, economics, elections!!!: GRAPH/network/net/...-PHYSICS Barabasi-Albert[RMP (02)] (r,t)-space VERSUS(???) [Where's the Inverse/ Dual/Integral-Transform???] (Benjamin)Franklin(1795)-Fourier(1795; 1897;1822)-Laplace(1850)-Mellin (1902) Brillouin(1922)-...(k,)-space, {Hubbard [The World According to Wavelets,Peters (96)-p.14!!!/p.246: refs.-F2!!!]},and then (2) Albert-Barabasi[]Bose-Einstein quantum-statistics(BEQS) Bose-Einstein CONDENSATION (BEC) versus Bianconi[pvt.-comm.; arXiv:cond-mat/0204506; ...] -Barabasi [???] Fermi-Dirac

  4. In situ STM studies of Sb(111) electrodes in aqueous electrolyte solutions

    NASA Astrophysics Data System (ADS)

    Grozovski, V.; Kallip, S.; Lust, E.

    2013-07-01

    The in situ STM studies of Sb(111), which was cleaved at the temperature of liquid nitrogen inside the glove box, and of Sb(111), which was electrochemically polished in the KI + HCl aqueous solution, have been performed under negative polarizations from - 0.8 to - 0.15 V (versus Ag|AgCl in sat. KCl aqueous solution) in the 0.5 M Na2SO4 + 0.0003 M H2SO4 aqueous solution. The atomic resolution has been achieved. The in situ STM data show that there are no quick surface reconstruction processes and the surface structure of cleaved and electrochemically polished Sb(111) is stable within the potential region investigated, similarly for Bi(111) single crystal electrode, previously studied [S. Kallip, E. Lust, Electrochem. Comm. 7 (2005) 863].

  5. A program of generation and selection of configurations for the configuration interaction method in atomic calculations SELECTCONF

    NASA Astrophysics Data System (ADS)

    Bogdanovich, P.; Karpuškienė, R.; Momkauskaitė, A.

    2005-11-01

    This program written in FORTRAN is aimed at generation and selection of the admixed configurations which are used in the theoretical calculations of atomic states by the configuration interaction (CI) method. The admixed configurations are generated and selected using the file of radial orbitals written down in the form adopted in the code [C. Froese Fischer, Comput. Phys. Comm. 43 (1987) 355] and other analogous codes. Selection of configurations is performed on the ground of evaluations in the second order of the perturbation theory [P. Bogdanovich, R. Karpu\\vskienė, Comput. Phys. Comm. 134 (2001) 321; R. Karpu\\vskienė, R. Karazija, P. Bogdanovich, Phys. Scripta 64 (2001) 333]. Output of selected configurations is arranged in a format suitable for the codes generating the configuration states [C. Froese Fischer, B. Liu, Comput. Phys. Comm. 64 (1991) 406; P. Bogdanovich, A. Momkauskaitė, Comput. Phys. Comm. 157 (2004) 217]. Program summaryTitle of program:SELECTCONF Catalogue identifier:ADWD Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADWD Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland Licensing provisions:None Computers:Any computer with a FORTRAN 77 compiler Operating systems under which the program has been tested:Linux Programming language used:FORTRAN 77 Memory required to execute with typical data:4 MB No. of lines in distributed program, including test data, etc.:7459 No. of bytes in distributed program, including test data, etc.:108 420 Distribution format:gzip file Nature of the physical problem:Due to the restricted possibilities of the computers and codes, which are employed, the practice of CI requires one to select and superpose those configurations the usage of which happens to be the most effective. This program is designed for the selection of such admixed configurations. Method of solution:All admixed configurations possible in the specified basis set of radial orbitals (RO) are constructed

  6. MPI implementation of a generalized implicit algorithm for multi-dimensional PIC simulations

    NASA Astrophysics Data System (ADS)

    Petrov, George; Davis, Jack

    2012-10-01

    The implicit 2D3V particle-in-cell (PIC) code developed to study the interaction of short pulse lasers with matter [G. M. Petrov and J. Davis, Computer Phys. Comm. 179, 868 (2008); Phys. Plasmas 18, 073102 (2011)] has been parallelized using MPI (Message Passing Interface). Performance evaluation has been made on a Linux cluster for two typical regimes of PIC operation: ``particle dominated,'' for which the bulk of the computation time is spent on pushing particles, and ``field dominated,'' for which computing the fields is prevalent. The MPI implementation of the code offers a significant numerical speedup, particularly in the ``particle dominated'' regime, which will allow extension to three dimensions and implementation of atomic physics.

  7. Définir les choix à risque: l'éthique et les effets des décisions organisationnelles.

    PubMed

    Warren, Marika

    2016-07-01

    Les choix de vivre « à risque » sont complexes et difficiles. Ils peuvent être structurés par les politiques organisationnelles. Certaines personnes veulent vraiment vivre dans des situations à haut risque ou perçues comme telles parce qu'elles en tirent un avantage important. Cependant, il est probable que ces choix dépendent en grande partie du contexte et qu'ils ne se soient pas posés dans une autre situation. L'article plaide pour la responsabilité d'être attentif aux effets des décisions organisationnelles sur les choix de vivre à risque et sur la répartition globale du risque. PMID:27365384

  8. OPNMR measurements of electron spin polarization as a function of Landau filling factor around ν=1/3

    NASA Astrophysics Data System (ADS)

    Kuzma, N. N.; Khandelwal, P.; Barrett, S. E.; Pfeiffer, L. N.; West, K. W.

    1998-03-01

    Optically Pumped Nuclear Magnetic Resonance measurements of the Knight Shift(S.E.Barrett et al.,Phys.Rev.Lett.72),1368(1994).^,footnote S. E. Barrett et al., Phys. Rev. Lett. 74, 5112 (1995)^,footnote R. Tycko et al., Science 268, 1460 (1995) (K_S) of ^71Ga in two different electron doped multiple quantum well samples are presented. These are the first direct measurements of the electron spin magnetization around Landau Level ν=1/3. The talk will focus on the electron spin polarization in the range of filling factors around ν=1/3 and compare these results with existing models(Kamilla,Wu,Jain,Solid State Comm.99),283(1996). for quasiparticle excitations. First evidence for the breakdown of motional narrowing regime, probed by NMR, will be presented. The onset of such breakdown may be a result of localization of quasiparticles below ν=1/3. No evidence for a sharp phase transition is observed.

  9. Fracture in columnar phases as a test for the presence of quasi long-range order

    NASA Astrophysics Data System (ADS)

    Hébert, Matthieu; Caillé, Alain

    1997-03-01

    A mechanism has been proposed for the effective free sliding of columns in an ordered columnar liquid crystal composed of disk-like molecules(A. Caillé and M. Hébert, to appear in Phys. Rev. E - Rapid Comm. (1996)). The hexa(hexylthio)triphenylene (HHTT) compound in the ordered helical H phase is the prototype for such a behavior. This mechanism is a result of a coupling between positional and orientational degrees of freedom in the free energy and gives rise to positional quasi long-range order inside the columns. We discuss the Griffith problem for this system where a thin cavity perpendicular to the columnar axis is extended by a tensile stress σ_zz. The shape of the cavity is characteristic of the type of order present inside the columns. This fracture mode should be observable in polymerized samples.

  10. Quantum Error Correction for Metrology

    NASA Astrophysics Data System (ADS)

    Sushkov, Alex; Kessler, Eric; Lovchinsky, Igor; Lukin, Mikhail

    2014-05-01

    The question of the best achievable sensitivity in a quantum measurement is of great experimental relevance, and has seen a lot of attention in recent years. Recent studies [e.g., Nat. Phys. 7, 406 (2011), Nat. Comms. 3, 1063 (2012)] suggest that in most generic scenarios any potential quantum gain (e.g. through the use of entangled states) vanishes in the presence of environmental noise. To overcome these limitations, we propose and analyze a new approach to improve quantum metrology based on quantum error correction (QEC). We identify the conditions under which QEC allows one to improve the signal-to-noise ratio in quantum-limited measurements, and we demonstrate that it enables, in certain situations, Heisenberg-limited sensitivity. We discuss specific applications to nanoscale sensing using nitrogen-vacancy centers in diamond in which QEC can significantly improve the measurement sensitivity and bandwidth under realistic experimental conditions.

  11. Memorial W.Gentner

    ScienceCinema

    None

    2011-04-25

    Le DG H.Schopper fait une introduction pour la commémoration et cérémonie de la vie et du travail du Prof.Wolfgang Gentner. W. Gentner, physicien allemand, né en 1906 à Francfort et mort en septembre 1980 à Heidelberg, était directeur au Cern de 1955 à 1960, président du "scientific policy commitee" de 1968 à 1971 et président du Conseil du Cern de 1972 à 1974. Il était un des fondateurs du Cern et 4 personnes qui l'ont bien connu lui rendent hommage, entre autres un de ses élèves, ainsi que Mme ?, J.B.Adams et O.Sheffard(?)

  12. Comparaison des effets de la xylazine et de la romifidine administrées en période péri-opératoire sur le réveil de chevaux anesthésiés

    PubMed Central

    Bauquier, Sébastien H.; Kona-Boun, Jean-Jacques

    2011-01-01

    Cette étude prospective compare les effets de la xylazine et de la romifidine sur la qualité du réveil de chevaux anesthésiés. Vingt-huit chevaux sains présentés pour des arthroscopies étaient aléatoirement distribués entre 2 groupes. Le protocole anesthésique intraveineux du groupe xylazine comprenait : butorphanol (0,02 mg/kg) et xylazine (0,5–0,7 mg/kg) en prémédication, diazépam (0,1 mg/kg), kétamine (2,2 mg/kg) et isoflurane comme agents anesthésiques, et xylazine (0,1 mg/kg) comme sédatif au réveil. La xylazine était remplacée par la romifidine 0,05–0,08 mg/kg (prémédication) et 0,01 mg/kg (réveil) dans le groupe romifidine. La qualité du réveil était évaluée à l’aveugle au moyen d’une grille d’évaluation. Le test de la somme des rangs de Wilcoxon (P < 0,05) a été utilisé pour l’analyse statistique. Les notes de la qualité du réveil n’étaient pas statiquement différentes entre les deux groupes. Dans cette étude, la romifidine et la xylazine influençaient de façon similaire la qualité du réveil. PMID:22379199

  13. Optimal Decay Rate of the Compressible Navier-Stokes-Poisson System in {mathbb {R}^3}

    NASA Astrophysics Data System (ADS)

    Li, Hai-Liang; Matsumura, Akitaka; Zhang, Guojing

    2010-05-01

    The compressible Navier-Stokes-Poisson (NSP) system is considered in {mathbb {R}^3} in the present paper, and the influences of the electric field of the internal electrostatic potential force governed by the self-consistent Poisson equation on the qualitative behaviors of solutions is analyzed. It is observed that the rotating effect of electric field affects the dispersion of fluids and reduces the time decay rate of solutions. Indeed, we show that the density of the NSP system converges to its equilibrium state at the same L 2-rate {(1+t)^{-frac {3}{4}}} or L ∞-rate (1 + t)-3/2 respectively as the compressible Navier-Stokes system, but the momentum of the NSP system decays at the L 2-rate {(1+t)^{-frac {1}{4}}} or L ∞-rate (1 + t)-1 respectively, which is slower than the L 2-rate {(1+t)^{-frac {3}{4}}} or L ∞-rate (1 + t)-3/2 for compressible Navier-Stokes system [Duan et al., in Math Models Methods Appl Sci 17:737-758, 2007; Liu and Wang, in Comm Math Phys 196:145-173, 1998; Matsumura and Nishida, in J Math Kyoto Univ 20:67-104, 1980] and the L ∞-rate (1 + t)- p with {p in (1, 3/2)} for irrotational Euler-Poisson system [Guo, in Comm Math Phys 195:249-265, 1998]. These convergence rates are shown to be optimal for the compressible NSP system.

  14. A Human-in-the-Loop Evaluation of Multi-Sector Planning in Mixed Equipage Airspace (MSP III)

    NASA Technical Reports Server (NTRS)

    Smith, Nancy; Prevot, Tom; Kessell, Angela; Homola, Jeff; Lee, Hwasoo; Mercer, Joey; Brasil, Connie; Mainini, Matt; Lee, Paul

    2011-01-01

    A human-in-the-loop (HITL) simulation was conducted in May 2010 to determine the feasibility and value 01 conducting multi-sector planning (MSP) operations in a mixed equipage environment. Aircraft were categorized as equipped or unequipped based on the presence or absence of an air-ground data communications (Data Comm) capability for receiving auto-loadable clearances and transfer of communication messages from the air navigation service provider (ANSP). The purpose of the study was to determine the feasibility and possible benefits of introducing multi-sector planning in a mixed equipage context, or whether Data Comm equipage was required for MSP operations. Each test scenario presented one of three different equipage levels to the controllers (10%, 50% or 90% equipped aircraft), so that the operational impact of different equipage levels could be observed. Operational feasibility assessment addressed two related questions: (1) are MSP operations feasible for unequipped aircraft, and (2) are they feasible in a mixed equipage context. Similarly, two categories of potential benefits were explored: (1) system performance improvements (e.g., throughput, workload) associated with MSP at different equipage levels, and (2) the possibility of providing differential service for equipage through MSP operations. Tool requirements (for both planning and controller stations), as well as planning and coordination procedures - within facility (traffic management unit/operational area) and within sector (R-Side/D-Side) - were two other topics addressed in the study. Overall, results suggested that MSP operations were feasible in a mixed equipage environment and that the tools were effective with both equipped and unequipped aircraft. Using the MSP tools, traffic management coordinators were able to manage controller task load, effectively balancing throughput with complexity and controller task load at each of the three equipage levels tested.

  15. Motherhood as a Gendered Entitlement: Intentionality, "Othering," and Homosociality in the Online Infertility Community.

    PubMed

    Whitehead, Krista

    2016-02-01

    La maternité est un des plus grands rites de passage vers la féminité adulte chez les femmes. Cependant, toutes les femmes n'ont pas accès à cette maternité. Dans cet article, j'explore la communauté des personnes infertiles en ligne, dans lesquelles les femmes traient de leur exclusion et expriment leur incrédulité face à la perspective d'avoir un enfant biologique. Les femmes considèrent leur infertilité comme une injustice, ce qui les mène à revendiquer cette maternité. Je soutiens que la façon dont les femmes revendiquent la maternité change notre compréhension de la maternité comme norme du genre féminin. La maternité est plus que la poursuite d'une identité du genre féminin; c'est également un droit de la femme. Cette recherche pousse en avant les conceptualisations analytiques de la maternité, tout en enrichissant de façon empirique nos connaissances face à l'homosocialité des femmes. Motherhood is one of the most enduring rites of passage to adult femininity for women. However, not all women have access to motherhood. In this paper, I explore the online infertility community wherein women blog to process their exclusion, expressing incredulity about the prospect of never having a biological child of their own. Women understand their infertility as an injustice, leading them to lay claim to motherhood. I argue that how women lay claim to motherhood changes our understanding of motherhood as a gendered norm. Motherhood is more than a pursuit of a gender identity; it is also a gendered entitlement. This research pushes analytic conceptualizations of motherhood forward, while also empirically enriching our knowledge about women's homosociality. PMID:26890448

  16. Habitat suitability index models: redhead (wintering)

    USGS Publications Warehouse

    Howard, Rebecca J.; Kantrud, Harold A.

    1983-01-01

    The redhead is a North American waterfowl species with economic as well as ecological importance. It is highly desired by hunters. Retrieved redhead kill in the United States averaged 143,000 birds during the three waterfowl seasons from 1975 to 1977 (U.S. Department of the Interior 1981a, 1981b). Populations on the principal breeding grounds of the redhead--the prairie and parkland region of south-central Canada and north-central United States--averaged 710,000 birds from 1955 to 1981 (Bellrose 1976; A. Novara, U.S. Fish and Wildlife Service [USFWS], Jamestown, North Dakota; pers. comm.). Redhead numbers began to decline in the 1960's. Killing redheads became illegal from 1960 to 1963, and strict bag limits were imposed after that (Bellrose 1976). A breeding population low of 387,000 birds occurred in 1963, but prairie populations began to recover after that time. Their numbers peaked in 1980 when 1,146,000 birds were recorded (A. Novara, pers. comm.). During the fall, over a third of the total redhead population uses the migration corridor that extends from the prairie breeding area to the Texas gulf coast. Another migration corridor extends from the second most important breeding area--the Great Salt Basin--to the Texas coast (Bellrose 1976). During the fall, over a third of the total redhead population uses the migration corridor that extends from the prairie breeding area to the Texas gulf coast. Another migration corridor extends from the second most important breeding area--the Great Salt Basin--to the Texas coast (Bellrose 1976).

  17. Modelisation par elements finis du muscle strie

    NASA Astrophysics Data System (ADS)

    Leonard, Mathieu

    Ce present projet de recherche a permis. de creer un modele par elements finis du muscle strie humain dans le but d'etudier les mecanismes engendrant les lesions musculaires traumatiques. Ce modele constitue une plate-forme numerique capable de discerner l'influence des proprietes mecaniques des fascias et de la cellule musculaire sur le comportement dynamique du muscle lors d'une contraction excentrique, notamment le module de Young et le module de cisaillement de la couche de tissu conjonctif, l'orientation des fibres de collagene de cette membrane et le coefficient de poisson du muscle. La caracterisation experimentale in vitro de ces parametres pour des vitesses de deformation elevees a partir de muscles stries humains actifs est essentielle pour l'etude de lesions musculaires traumatiques. Le modele numerique developpe est capable de modeliser la contraction musculaire comme une transition de phase de la cellule musculaire par un changement de raideur et de volume a l'aide des lois de comportement de materiau predefinies dans le logiciel LS-DYNA (v971, Livermore Software Technology Corporation, Livermore, CA, USA). Le present projet de recherche introduit donc un phenomene physiologique qui pourrait expliquer des blessures musculaires courantes (crampes, courbatures, claquages, etc.), mais aussi des maladies ou desordres touchant le tissu conjonctif comme les collagenoses et la dystrophie musculaire. La predominance de blessures musculaires lors de contractions excentriques est egalement exposee. Le modele developpe dans ce projet de recherche met ainsi a l'avant-scene le concept de transition de phase ouvrant la porte au developpement de nouvelles technologies pour l'activation musculaire chez les personnes atteintes de paraplegie ou de muscles artificiels compacts pour l'elaboration de protheses ou d'exosquelettes. Mots-cles Muscle strie, lesion musculaire, fascia, contraction excentrique, modele par elements finis, transition de phase

  18. An improved version of ISICS: a program for calculating K-, L- and M-shell cross sections from PWBA and ECPSSR theory using a personal computer

    NASA Astrophysics Data System (ADS)

    Cipolla, Sam J.

    2007-01-01

    The C program, ISICS [Z. Liu, S.J. Cipolla, Comput. Phys. Comm. 97 (1996) 315-330], which calculates ionization and X-ray production cross-sections using PWBA and ECPSSR theory, has been enhanced to include new options, correct some minor flaws, and to make the program more versatile. Program summaryTitle of program: ISICS Catalog identifier: ADDS_v2_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADDS_v2_0 Program available from: CPC Program Library, Queen's University of Belfast, N. Ireland Operating system under which the program has been tested: WINDOWS XP Program language used: C Computer: 80486 or higher-level PCs No. of lines in distributed program, including test data, etc.: 5343 No. of bytes in distributed program, including test data, etc.: 151 838 Distribution format: tar.gz Catalogue identifier of previous version: ADDS Journal reference of previous version: Comput. Phys. Comm. 97 (1996) 315-330 Does the new version supersede the previous version: Yes Nature of the physical problem: Ionization and X-ray production cross-section calculations for ion-atom collisions. Reasons for new version: Increased functionality and new options. Summary of revisions: Option for the united-atom approximation for binding-energy correction; easier inputting of updated atomic parameters; extension of projectile energy down to eV range; accounting for DHS wave function in K-shell ionization; other miscellaneous changes. Method of solution: Numerical integration of form factor using a logarithmic transform and Gaussian quadrature, plus exact integration limits. Restrictions on the complexity of the problem: The consumed CPU time increases with the atomic shell (K, L, M), but execution is still very fast. Typical running time: No change from previous version. Unusual features of the program: No

  19. Kinetics of the development of a nonchromate conversion coating for magnesium alloys and magnesium-based metal matrix composites

    SciTech Connect

    Gonzalez-Nunez, M.A.; Skeldon, P.; Thompson, G.E.; Karimzadeh, H.

    1999-12-01

    Kinetics of the development of a conversion coating from a stannate bath on commercial purity magnesium (Mg{sup comm}), magnesium-based alloys ZC71 and WE43, and a metal matrix composite (MMC), comprising a ZC71 alloy matrix and 12 vol% silicon carbide (SiC) particles were studied using linear polarization resistance, potential-time, potentiodynamic polarization, x-ray diffraction, Rutherford backscattering spectroscopy, and microscopic examination. The coating, typically {approximately}3 {micro}m to 5 {micro}m thick, was composed largely of crystalline magnesium tin oxide (MgSnO{sub 3} {center{underscore}dot} 3H{sub 2}O), and developed by a nucleation and growth process through an initial corrosion film on the substrate. Nucleation probably occurred on regions where a critical concentration of magnesium ions was reached for coating crystals to form. Specific sites of nucleation, such as particles of eutectic phase and of reinforcement, were revealed in some cases, but frequently the precise sites of nucleation were not disclosed. A longer treatment time (at least 35 min) was suggested by polarization resistance data for improved coverage of the substrate than the previously recommended time of 20 min. The coating continuity on the substrates, after a particular time of treatment, depends upon ally composition increasing in order: Mg{sup comm}, 12% (SiC)p/ZC71 alloy MMC, ZC71 alloy, and WE43 alloy. Polarization resistance (R{sub p}) changed systematically with coating development, showing a decrease in R{sub p} in the early stages of the coating process, related to the initial corrosion.

  20. Changing dietary behaviour: the role and development of practitioner communication.

    PubMed

    Whitehead, Kirsten

    2015-05-01

    The need to support people to change diet-related behaviour is widely advocated and how to do this effectively in practice is an expanding area of research. Important factors to consider are how healthcare practitioners communicate with their patients and how that communication may affect diet-related behaviour change and subsequent outcomes. The aim of the present paper is to discuss communication skills for behaviour change (CSBC), focusing predominantly on registered dietitians who are required to communicate effectively and have an important role in supporting patients to change diet-related behaviour. The views of dietitians in relation to CSBC have been investigated and respondents have consistently reported that they perceive these skills to be of vital importance in practice. Patient views have reiterated the importance of good CSBC in one-to-one consultations. However, pre-qualification training of dietitians is thought to deliver practitioners who are competent at a minimum level. The need for ongoing continuous professional development (CPD) in relation to CSBC has been recognised but currently most CPD focuses on updating knowledge rather than improving these essential skills. Measuring CSBC in a consistent and objective manner is difficult and an assessment tool, DIET-COMMS, has been developed and validated for this purpose. DIET-COMMS can be used to support CSBC development, but concerns about logistical challenges and acceptability of implementing this in practice have been raised. Although a suitable assessment tool now exists there is a need to develop ways to facilitate assessment of CSBC in practice. PMID:25582531

  1. A Framework for Dimensioning VDL-2 Air-Ground Networks

    NASA Technical Reports Server (NTRS)

    Ribeiro, Leila Z.; Monticone, Leone C.; Snow, Richard E.; Box, Frank; Apaza, Rafel; Bretmersky, Steven

    2014-01-01

    This paper describes a framework developed at MITRE for dimensioning a Very High Frequency (VHF) Digital Link Mode 2 (VDL-2) Air-to-Ground network. This framework was developed to support the FAA's Data Communications (Data Comm) program by providing estimates of expected capacity required for the air-ground network services that will support Controller-Pilot-Data-Link Communications (CPDLC), as well as the spectrum needed to operate the system at required levels of performance. The Data Comm program is part of the FAA's NextGen initiative to implement advanced communication capabilities in the National Airspace System (NAS). The first component of the framework is the radio-frequency (RF) coverage design for the network ground stations. Then we proceed to describe the approach used to assess the aircraft geographical distribution and the data traffic demand expected in the network. The next step is the resource allocation utilizing optimization algorithms developed in MITRE's Spectrum ProspectorTM tool to propose frequency assignment solutions, and a NASA-developed VDL-2 tool to perform simulations and determine whether a proposed plan meets the desired performance requirements. The framework presented is capable of providing quantitative estimates of multiple variables related to the air-ground network, in order to satisfy established coverage, capacity and latency performance requirements. Outputs include: coverage provided at different altitudes; data capacity required in the network, aggregated or on a per ground station basis; spectrum (pool of frequencies) needed for the system to meet a target performance; optimized frequency plan for a given scenario; expected performance given spectrum available; and, estimates of throughput distributions for a given scenario. We conclude with a discussion aimed at providing insight into the tradeoffs and challenges identified with respect to radio resource management for VDL-2 air-ground networks.

  2. An open-access mobile compatible electronic patient register for rheumatic heart disease (‘eRegister’) based on the World Heart Federation’s framework for patient registers

    PubMed Central

    van Dam, Joris; Tadmor, Brigitta; Spector, Jonathan; Musuku, John; Zühlke, Liesl J; Zühlke, Liesl J; Engel, Mark E; Mayosi, Bongani M; Nestle, Nick

    2015-01-01

    Summary Background Rheumatic heart disease (RHD) remains a major disease burden in low-resource settings globally. Patient registers have long been recognised to be an essential instrument in RHD control and elimination programmes, yet to date rely heavily on paper-based data collection and non-networked data-management systems, which limit their functionality. Objectives To assess the feasibility and potential benefits of producing an electronic RHD patient register. Methods We developed an eRegister based on the World Heart Federation’s framework for RHD patient registers using CommCare, an open-source, cloud-based software for health programmes that supports the development of customised data capture using mobile devices. Results The resulting eRegistry application allows for simultaneous data collection and entry by field workers using mobile devices, and by providers using computer terminals in clinics and hospitals. Data are extracted from CommCare and are securely uploaded into a cloud-based database that matches the criteria established by the WHF framework. The application can easily be tailored to local needs by modifying existing variables or adding new ones. Compared with traditional paper-based data-collection systems, the eRegister reduces the risk of data error, synchronises in real-time, improves clinical operations and supports management of field team operations. Conclusions The user-friendly eRegister is a low-cost, mobile, compatible platform for RHD treatment and prevention programmes based on materials sanctioned by the World Heart Federation. Readily adaptable to local needs, this paperless RHD patient register program presents many practical benefits. PMID:26444995

  3. Central chemoreceptors and sympathetic vasomotor outflow

    PubMed Central

    Moreira, Thiago S; Takakura, Ana C; Colombari, Eduardo; Guyenet, Patrice G

    2006-01-01

    The present study explores how elevations in brain PCO2 increase the sympathetic nerve discharge (SND). SND, phrenic nerve discharge (PND) and putative sympathoexcitatory vasomotor neurons of the rostral ventrolateral medulla (RVLM) were recorded in anaesthetized sino-aortic denervated and vagotomized rats. Hypercapnia (end-expiratory CO2 from 5% to 10%) increased SND (97 ± 6%) and the activity of RVLM neurons (67 ± 4%). Injection of kynurenic acid (Kyn, ionotropic glutamate receptor antagonist) into RVLM or the retrotrapezoid nucleus (RTN) eliminated or reduced PND, respectively, but did not change the effect of CO2 on SND. Bilateral injection of Kyn or muscimol into the rostral ventral respiratory group (rVRG-pre-Bötzinger region, also called CVLM) eliminated PND while increasing the stimulatory effect of CO2 on SND. Muscimol injection into commissural part of the solitary tract nucleus (commNTS) had no effect on PND or SND activation by CO2. As expected, injection of Kyn into RVLM or muscimol into commNTS virtually blocked the effect of carotid body stimulation on SND in rats with intact carotid sinus nerves. In conclusion, CO2 increases SND by activating RVLM sympathoexcitatory neurons. The relevant central chemoreceptors are probably located within or close to RVLM and not in the NTS or in the rVRG-pre-Bötzinger/CVLM region. RVLM sympathoexcitatory neurons may be intrinsically pH-sensitive and/or receive excitatory synaptic inputs from RTN chemoreceptors. Activation of the central respiratory network reduces the overall sympathetic response to CO2, presumably by activating barosensitive CVLM neurons and inhibiting RTN chemoreceptors. PMID:16901945

  4. Analysis of δ18O and δ2H of fluid inclusion water in speleothems using cavity ring-down spectroscopy

    NASA Astrophysics Data System (ADS)

    Arienzo, M. M.; Swart, P. K.; Schroeder, C.; Hsiao, G.; Vonhof, H. B.

    2012-12-01

    Fluid inclusion isotope analysis is the analysis of microscopic, water filled cavities in speleothems. These cavities preserve drip water at the time of formation and fluid inclusions isotopic analysis provides information on the formation water (δ18Ow) and temperature can be calculated. The determination of δ18Ow and temperature is valuable for paleoclimate reconstructions. Recent work on speleothem fluid inclusions has utilized continuous-flow isotopic ratio mass spectrometry (IRMS) methods for determination of δ18Ow and δ2H of fluid inclusion water (Vonhof et al., Rapid. Comm. Mass Spec., 20:2553-2558, 2006; Dublyansky, and Spotl, Rapid. Comm. Mass Spec., 23: 2605-2613, 2009). Here we present a new technique utilizing cavity-ring down spectroscopy (CRDS) for δ18O and δ2H analysis of fluid inclusions and compare the data obtained to that measured on the Amsterdam Device which is a crusher system linked with an IRMS developed at the VU University Amsterdam. The extraction line at the University of Miami is an in-line system directly interfaced with the Picarro CRDS isotopic water analyzer and the design of the line is similar to the Amsterdam Device. The extraction line consists of a crusher device which is a modified valve unit, a septum port for the direct injection of water and a water trap. The CRDS technique is based on using a near infrared laser which is scanned over the H2O spectral range and by measuring the absorption spectra by ring-down, isotopic abundances are determined. This system has the potential for greater precision measurements than traditional IRMS systems. Therefore for fluid inclusion analysis, CRDS may prove to be an alternative to IRMS.

  5. Decision support system for breast cancer detection using mammograms.

    PubMed

    Ganesan, Karthikeyan; Acharya, Rajendra U; Chua, Chua K; Min, Lim C; Mathew, Betty; Thomas, Abraham K

    2013-07-01

    Mammograms are by far one of the most preferred methods of screening for breast cancer. Early detection of breast cancer can improve survival rates to a greater extent. Although the analysis and diagnosis of breast cancer are done by experienced radiologists, there is always the possibility of human error. Interobserver and intraobserver errors occur frequently in the analysis of medical images, given the high variability between every patient. Also, the sensitivity of mammographic screening varies with image quality and expertise of the radiologist. So, there is no golden standard for the screening process. To offset this variability and to standardize the diagnostic procedures, efforts are being made to develop automated techniques for diagnosis and grading of breast cancer images. This article presents a classification pipeline to improve the accuracy of differentiation between normal, benign, and malignant mammograms. Several features based on higher-order spectra, local binary pattern, Laws' texture energy, and discrete wavelet transform were extracted from mammograms. Feature selection techniques based on sequential forward, backward, plus-l-takeaway-r, individual, and branch-and-bound selections using the Mahalanobis distance criterion were used to rank the features and find classification accuracies for combination of several features based on the ranking. Six classifiers were used, namely, decision tree classifier, fisher classifier, linear discriminant classifier, nearest mean classifier, Parzen classifier, and support vector machine classifier. We evaluated our proposed methodology with 300 mammograms obtained from the Digital Database for Screening Mammography and 300 mammograms from the Singapore Anti-Tuberculosis Association CommHealth database. Sensitivity, specificity, and accuracy values were used to compare the performances of the classifiers. Our results show that the decision tree classifier demonstrated an excellent performance compared to

  6. COMMD1 regulates the delta epithelial sodium channel ({delta}ENaC) through trafficking and ubiquitination

    SciTech Connect

    Chang, Tina; Ke, Ying; Ly, Kevin; McDonald, Fiona J.

    2011-08-05

    Highlights: {yields} The COMM domain of COMMD1 mediates binding to {delta}ENaC. {yields} COMMD1 reduces the cell surface population of {delta}ENaC. {yields} COMMD1 increases the population of {delta}ENaC-ubiquitin. {yields} Both endogenous and transfected {delta}ENaC localize with COMMD1 and transferrin suggesting they are located in early/recycling endosomes. -- Abstract: The delta subunit of the epithelial sodium channel ({delta}ENaC) is a member of the ENaC/degenerin family of ion channels. {delta}ENaC is distinct from the related {alpha}-, {beta}- and {gamma}ENaC subunits, known for their role in sodium homeostasis and blood pressure control, as {delta}ENaC is expressed in brain neurons and activated by external protons. COMMD1 (copper metabolism Murr1 domain 1) was previously found to associate with and downregulate {delta}ENaC activity. Here, we show that COMMD1 interacts with {delta}ENaC through its COMM domain. Co-expression of {delta}ENaC with COMMD1 significantly reduced {delta}ENaC surface expression, and led to an increase in {delta}ENaC ubiquitination. Immunocytochemical and confocal microscopy studies show that COMMD1 promoted localization of {delta}ENaC to the early/recycling endosomal pool where the two proteins were localized together. These results suggest that COMMD1 downregulates {delta}ENaC activity by reducing {delta}ENaC surface expression through promoting internalization of surface {delta}ENaC to an intracellular recycling pool, possibly via enhanced ubiquitination.

  7. Maple procedures for the coupling of angular momenta. IX. Wigner D-functions and rotation matrices

    NASA Astrophysics Data System (ADS)

    Pagaran, J.; Fritzsche, S.; Gaigalas, G.

    2006-04-01

    The Wigner D-functions, Dpqj(α,β,γ), are known for their frequent use in quantum mechanics. Defined as the matrix elements of the rotation operator Rˆ(α,β,γ) in R and parametrized in terms of the three Euler angles α, β, and γ, these functions arise not only in the transformation of tensor components under the rotation of the coordinates, but also as the eigenfunctions of the spherical top. In practice, however, the use of the Wigner D-functions is not always that simple, in particular, if expressions in terms of these and other functions from the theory of angular momentum need to be simplified before some computations can be carried out in detail. To facilitate the manipulation of such Racah expressions, here we present an extension to the RACAH program [S. Fritzsche, Comput. Phys. Comm. 103 (1997) 51] in which the properties and the algebraic rules of the Wigner D-functions and reduced rotation matrices are implemented. Care has been taken to combine the standard knowledge about the rotation matrices with the previously implemented rules for the Clebsch-Gordan coefficients, Wigner n-j symbols, and the spherical harmonics. Moreover, the application of the program has been illustrated below by means of three examples. Program summaryTitle of program:RACAH Catalogue identifier:ADFv_9_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADFv_9_0 Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland Catalogue identifier of previous version: ADFW, ADHW, title RACAH Journal reference of previous version(s): S. Fritzsche, Comput. Phys. Comm. 103 (1997) 51; S. Fritzsche, S. Varga, D. Geschke, B. Fricke, Comput. Phys. Comm. 111 (1998) 167; S. Fritzsche, T. Inghoff, M. Tomaselli, Comput. Phys. Comm. 153 (2003) 424. Does the new version supersede the previous one: Yes, in addition to the spherical harmonics and recoupling coefficients, the program now supports also the occurrence of the Wigner rotation matrices in the algebraic

  8. Soins primaires des personnes victimes d’une lésion médullaire

    PubMed Central

    McColl, Mary Ann; Aiken, Alice; McColl, Alexander; Sakakibara, Brodie; Smith, Karen

    2012-01-01

    Résumé Objectif Effectuer une étude de la portée des données empiriques, entre 1980 et 2009, concernant les soins primaires aux adultes victimes d’une lésion médullaire (LME). Sources des données Une recension dans des revues révisées par des pairs de1980 à 2009 à l’aide de CINAHL, PubMed-MEDLINE, EMBASE, PsycINFO, Social Sciences Abstracts et Social Work Abstracts. Sélection des études La recherche électronique au moyen de mots-clés a permis de cerner 42 articles sur les soins primaires et les LME. Des critères d’inclusion ont servi à réduire la liste à un ensemble de 21 articles publiés en anglais qui portaient sur un échantillon de plus de 3 et présentaient une analyse empirique. Synthèse Environ 90 % des personnes atteintes d’une LME ont identifié leur médecin de famille comme étant leur docteur habituel; 63 % avaient un spécialiste des LME. Les personnes vivant à long terme avec une LME développent des rubriques complexes pour naviguer dans leurs systèmes de soins de santé personnels. Les données scientifiques ne sont pas unanimes quant à l’efficacité des programmes d’intervention directe pour le maintien de la santé et la prévention des complications à la suite d’une LME. Les données appuient cependant le suivi périodique par une équipe spécialisée et un bilan de santé annuel complet. La recherche fait valoir un fort degré d’uniformité dans l’identification des problèmes les plus courants soulevés par les personnes atteintes d’une LME en soins primaires, dont la plupart concernent l’incapacité, plus précisément les complications secondaires, comme la dysfonction intestinale ou vésicale et la douleur. Il existe aussi de bonnes données probantes à l’effet que de nombreux problèmes de santé généraux exigent de l’attention dans une telle population, comme les problèmes de la densité osseuse, la dépression et les questions entourant la santé sexuelle et la reproduction. Il y a

  9. Co-Variations of Ice Sheet Elevation and Slope with Accumulation, Radar Backscatter, and Temperature in West Antarctica

    NASA Astrophysics Data System (ADS)

    Haran, T.; Scambos, T.

    2004-12-01

    Maps of surface slope and elevation of the West Antarctic Ice Sheet (WAIS) may be refined by applying calibrated image pixel brightnesses to existing DEMs. Using these image-enhanced elevation models, and existing models of regional katabatic air flow, we investigate the relationship of accumulation, radar backscatter, and temperature to surface slope in the catchment area of the Ross Embayment ice streams. MODIS (Moderate Resolution Imaging Spectroradiometer) images were combined with the RAMP (Radarsat Antarctic Mapping Project) DEM and airborne laser altimeter profiles (from the ALICE/CASERTZ/SOAR aerogeophysics programs) to create a new 250-meter resolution slope and elevation DEM of the study region. The DEM fully resolves the surface undulation field of 2 - 10 km spatial scale, and permits an investigation of air-surface interaction effects in greater detail. Coupling this slope map with the regional mean wind pattern (Bromwich, pers. comm.), we compare local slope variations in the wind direction with accumulation variations derived from a 180-km ground-penetrating radar profile (Spikes, Hamilton, and Arcone, pers. comm.) and point accumulation measurements (Giovinetto, and Vaughan, pers. comm.). We also compare wind-direction slope and accumulation with radar backscatter intensity derived from the RAMP AMM-1 data set. Correlation between RAMP backscatter and accumulation along the traverse is very high (r = 0.8). Regions of higher accumulation are associated with lower backscatter. Accumulation varied as much as 3-fold over just 15 km in regions of significant local relief. Both backscatter and accumulation show high correlation (r= 0.7) with surface slope in the mean wind direction: higher accumulation occurs on windward slopes. This relationship suggests that slope, backscatter, and mean wind direction may be used to infer accumulation in high spatial detail throughout the continent. Mean surface temperature under clear-sky conditions also shows a

  10. My Internship at NASA

    NASA Technical Reports Server (NTRS)

    Lopez, Isaac

    2016-01-01

    My name is Isaac Lopez and I am a junior at the University of Houston majoring in Mechanical Engineering Technology. I will be completing my first tour at the NASA-Johnson Space Center ("JSC") as a Mechanical Engineer within the Human Interfaces Branch. Throughout my tour, I was given the opportunity to work on multiple projects that have expanded my knowledge and interest in acoustics and engineering design. One of the projects I worked on at JSC consisted of doing acoustic simulation of the EVA comm. cap. While working on the comm. cap headset, my main duty consisted of simulating the acoustics of the headset to find a solution to the condensing water that can accumulate and block the acoustic tube, causing attenuation or complete loss of audio in one ear for an astronaut using the EVA. For this project, I had to create a Creo model of the comm. cap so that I would be able to import it into Comsol for acoustic simulation. I also had the opportunity to design a portable and lightweight beam degrader for the EEE Parts and Radiation team. With the help of Creo, I was able to make a CAD design and put together a small working prototype for the radiation team to demonstrate the capabilities that the beam degrader had. In addition to these projects, JSC allowed me to work closely on projects with other interns. I had the opportunity to help another intern with his acoustic diverter, intended to improve the sound quality in Node 1 of the ISS. During this project, I helped with some of the acoustic testing inside the anechoic chamber as well as helping record data during testing at the ISS mock up. During the course of my first tour, I was able to learn and continually improve on my CAD drafting skills. With each project I worked on, I acquired new ways to create and improve various designs with various constraints. Furthermore, I also had the opportunity to work with electrical engineers and learn about the electronic components that would provide control of the beam

  11. HELAC-PHEGAS: A generator for all parton level processes

    NASA Astrophysics Data System (ADS)

    Cafarella, Alessandro; Papadopoulos, Costas G.; Worek, Malgorzata

    2009-10-01

    The updated version of the HELAC-PHEGAS event generator is presented. The matrix elements are calculated through Dyson-Schwinger recursive equations using color connection representation. Phase-space generation is based on a multichannel approach, including optimization. HELAC-PHEGAS generates parton level events with all necessary information, in the most recent Les Houches Accord format, for the study of any process within the Standard Model in hadron and lepton colliders. New version program summaryProgram title: HELAC-PHEGAS Catalogue identifier: ADMS_v2_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADMS_v2_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 35 986 No. of bytes in distributed program, including test data, etc.: 380 214 Distribution format: tar.gz Programming language: Fortran Computer: All Operating system: Linux Classification: 11.1, 11.2 External routines: Optionally Les Houches Accord (LHA) PDF Interface library ( http://projects.hepforge.org/lhapdf/) Catalogue identifier of previous version: ADMS_v1_0 Journal reference of previous version: Comput. Phys. Comm. 132 (2000) 306 Does the new version supersede the previous version?: Yes, partly Nature of problem: One of the most striking features of final states in current and future colliders is the large number of events with several jets. Being able to predict their features is essential. To achieve this, the calculations need to describe as accurately as possible the full matrix elements for the underlying hard processes. Even at leading order, perturbation theory based on Feynman graphs runs into computational problems, since the number of graphs contributing to the amplitude grows as n!. Solution method: Recursive algorithms based on Dyson-Schwinger equations have been developed recently in

  12. The Missing Memory of Canadian Sociology: Reflexive Government and "the Social Science".

    PubMed

    Curtis, Bruce

    2016-05-01

    The modest literature on the history of Canadian Sociology takes the appearance of a named academic discipline as its object. Canadian Sociology is held to have had some precursors in the 1880s, but really to appear only in the 1920s. It is described as a foreign import and as an activity first of intellectual speculation and moral reform. Observational and analytic practice are absent before 1880. The activities of state agents and government departments in the social field are not discussed. This article offers a richer account through an examination of the larger field from which Sociology was extracted, "the social science," which was practiced actively in colonial Canada from the early nineteenth century. The social science shaped and was itself shaped by colonial conditions. The article outlines three interrelated moments in social science to carry its claims: inventory-making, the emergence of "population-thinking," and "reflexive government." Attending to the social science underlines the complex and convoluted relations of sociology with state power. Les rares oeuvrages académiques portant sur l'histoire de la sociologie canadienne prend pour objet l'apparition du terme dans le contexte universitaire. Dans cet optique, ils signalent certains précurseurs de la sociologie canadienne dès les années 1880, mais en fait ils affirment que cette discipline n'apparaît que dans les années 1920. Cette discipline est présentée comme une importation académique et, d'abord et avant tout, comme de la spéculation intellectuelle et comme un projet de réforme morale. D'après cette vision, les pratiques d'observation et d'analyse sociales ne semblent pas exister avant 1880, et les acteurs politiques et administratifs sont absents du terrain. Notre article propose un examen plus riche du vaste champ duquel la sociologie académique fut arrachée: activement pratiquée au Canada à l'époque coloniale dès le début du XIXe si

  13. GRASP92: a package for large-scale relativistic atomic structure calculations

    NASA Astrophysics Data System (ADS)

    Parpia, F. A.; Froese Fischer, C.; Grant, I. P.

    2006-12-01

    Program summaryTitle of program: GRASP92 Catalogue identifier: ADCU_v1_1 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADCU_v1_1 Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland Licensing provisions: no Programming language used: Fortran Computer: IBM POWERstation 320H Operating system: IBM AIX 3.2.5+ RAM: 64M words No. of lines in distributed program, including test data, etc.: 65 224 No of bytes in distributed program, including test data, etc.: 409 198 Distribution format: tar.gz Catalogue identifier of previous version: ADCU_v1_0 Journal reference of previous version: Comput. Phys. Comm. 94 (1996) 249 Does the new version supersede the previous version?: Yes Nature of problem: Prediction of atomic spectra—atomic energy levels, oscillator strengths, and radiative decay rates—using a 'fully relativistic' approach. Solution method: Atomic orbitals are assumed to be four-component spinor eigenstates of the angular momentum operator, j=l+s, and the parity operator Π=βπ. Configuration state functions (CSFs) are linear combinations of Slater determinants of atomic orbitals, and are simultaneous eigenfunctions of the atomic electronic angular momentum operator, J, and the atomic parity operator, P. Lists of CSFs are either explicitly prescribed by the user or generated from a set of reference CSFs, a set of subshells, and rules for deriving other CSFs from these. Approximate atomic state functions (ASFs) are linear combinations of CSFs. A variational functional may be constructed by combining expressions for the energies of one or more ASFs. Average level (AL) functionals are weighted sums of energies of all possible ASFs that may be constructed from a set of CSFs; the number of ASFs is then the same as the number, n, of CSFs. Optimal level (OL) functionals are weighted sums of energies of some subset of ASFs; the GRASP92 package is optimized for this latter class of functionals. The composition of an ASF in terms

  14. Le mouvement du pôle

    NASA Astrophysics Data System (ADS)

    Bizouard, Christian

    2012-03-01

    Les variations de la rotation terrestre. En conditionnant à la fois notre vie quotidienne, notre perception du ciel, et bon nombre de phénomènes géophysiques comme la formation des cyclones, la rotation de la Terre se trouve au croisement de plusieurs disciplines. Si le phenomena se faisait uniformément, le sujet serait vite discuté, mais c'est parce que la rotation terrestre varie, même imperceptiblement pour nos sens, dans sa vitesse angulaire comme dans la direction de son axe, qu'elle suscite un grand intérêt. D'abord pour des raisons pratiques : non seulement les aléas de la rotation terrestre modi_ent à la longue les pointés astrométriques à un instant donné de la journée mais in_uencent aussi les mesures opérées par les techniques spatiales ; en consequence l'exploitation de ces mesures, par exemple pour déterminer les orbites des satellites impliqués ou pratiquer le positionnement au sol, nécessite une connaissance précise de ces variations. Plus fondamentalement, elles traduisent les propriétés globales de la Terre comme les processus physiques qui s'y déroulent, si bien qu'en analysant les causes des fluctuations observées, on dispose d'un moyen de mieux connaître notre globe. La découverte progressive des fluctuations de la rotation de la Terre a une longue histoire. Sous l'angle des techniques d'observation, trois époques se pro-celle du pointé astrométrique à l'oeil nu, à l'aide d'instruments en bois ou métalliques (quart de cercle muraux par exemple). À partir du XVIIe siècle débute l'astrométrie télescopique dont les pointés sont complétés par des datations de plus en plus précises grâce à l'invention d'horloges régulées par balancier. Cette deuxième époque se termine vers 1960, avec l'avènement des techniques spatiales : les pointés astrométriques sont délaissés au profit de la mesure ultra-précise de durées ou de fréquences de signaux électromagnétiques, grâce à l'invention des horloges

  15. Les campagnes communautaires de promotion du depistage VIH en Afrique de l’Ouest : perceptions des usagers au Burkina Faso

    PubMed Central

    Desclaux, Alice; Ky-Zerbo, Odette; Somé, Jean-François; Makhlouf-Obermeyer, Carla

    2014-01-01

    Résumé La politique actuelle de lutte contre le sida qui repose sur l’extension de l’accès aux traitements et à la prévention exige qu’une proportion élevée de la population connaisse son statut en matière de VIH. Pour cela, l’OMS a proposé le développement de stratégies communautaires délivrant le dépistage et le conseil au-delà des services de soins, comme le test à domicile ou les campagnes de sensibilisation et dépistage de grande envergure, appliqués en Afrique australe et de l’Est. Pour définir les stratégies pertinentes dans des régions de basse prévalence comme l’Afrique de l’Ouest, les expériences communautaires de promotion du dépistage doivent y être évaluées. Cet article présente une évaluation des campagnes au Burkina Faso du point de vue des usagers. Dans le cadre d’un projet sur les pratiques et l’éthique du dépistage dans quatre pays africains (MATCH), une enquête qualitative spécifique a été menée pendant la campagne de 2008, auprès de personnes ayant fait le test pendant la campagne, ayant fait le test hors campagne ou n’ayant pas fait le test. Les appréciations sont globalement très favorables aux campagnes, notamment à cause de l’information dispensée, l’accessibilité des sites, la gratuité du test, la qualité des services et l’effet d’entrainement. Les limites ou critiques sont essentiellement liées à l’affluence ou à la crainte de ne pas être soutenu en cas de résultat positif. La démarche de recours au test ne fait plus l’objet de suspicion, au moins pendant la campagne. Cette « normalisation » du recours au test et la mobilisation collective facilitent des pratiques en groupe, ce qui peut rendre difficile de garder son statut VIH secret. L’évaluation des campagnes par les usagers les présente comme une opportunité pour accéder facilement au test et pour communiquer à ce sujet dans divers espaces sociaux à partir des informations délivrées sur le VIH

  16. Multithreaded transactions in scientific computing. The Growth06_v2 program

    NASA Astrophysics Data System (ADS)

    Daniluk, Andrzej

    2009-07-01

    Writing a concurrent program can be more difficult than writing a sequential program. Programmer needs to think about synchronization, race conditions and shared variables. Transactions help reduce the inconvenience of using threads. A transaction is an abstraction, which allows programmers to group a sequence of actions on the program into a logical, higher-level computation unit. This paper presents a new version of the GROWTHGr and GROWTH06 programs. New version program summaryProgram title: GROWTH06_v2 Catalogue identifier: ADVL_v2_1 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADVL_v2_1.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 65 255 No. of bytes in distributed program, including test data, etc.: 865 985 Distribution format: tar.gz Programming language: Object Pascal Computer: Pentium-based PC Operating system: Windows 9x, XP, NT, Vista RAM: more than 1 MB Classification: 4.3, 7.2, 6.2, 8, 14 Catalogue identifier of previous version: ADVL_v2_0 Journal reference of previous version: Comput. Phys. Comm. 175 (2006) 678 Does the new version supersede the previous version?: Yes Nature of problem: The programs compute the RHEED intensities during the growth of thin epitaxial structures prepared using the molecular beam epitaxy (MBE). The computations are based on the use of kinematical diffraction theory. Solution method: Epitaxial growth of thin films is modelled by a set of non-linear differential equations [1]. The Runge-Kutta method with adaptive stepsize control was used for solving initial value problem for non-linear differential equations [2]. Reasons for new version: According to the users' suggestions functionality of the program has been improved. Moreover, new use cases have been added which make the handling of the program easier and more

  17. Orbites coadjointes et variétés caractéristiques

    NASA Astrophysics Data System (ADS)

    Baklouti, Ali; Dhieb, Sami; Manchon, Dominique

    2005-05-01

    The purpose of the present work is to describe a dequantization procedure for topological modules over a deformed algebra. We define the characteristic variety of a topological module as the common zeroes of the annihilator of the representation obtained by setting the deformation parameter to zero. On the other hand, the Poisson characteristic variety is defined as the common zeroes of the ideal obtained by considering the annihilator of the deformed representation, and only then setting the deformation parameter to zero. Using Gabber's theorem, we show the involutivity of the characteristic variety. The Poisson characteristic variety is indeed a Poisson subvariety of the underlying Poisson manifold. We compute explicitly the characteristic variety in several examples in the Poisson-linear case, including the dual of any exponential solvable Lie algebra. In the nilpotent case, we show that any coadjoint orbit appears as the Poisson characteristic variety of a well chosen topological module. Résumé:Nous présentons dans ce travail un procédé de déquantification pour des modules topologiques sur une algèbre déformée. Nous définissons la variété caractéristique d'un module topologique comme l'ensemble des zéros communs de l'annulateur de la représentation obtenue en annulant le paramètre de déformation. Nous définissons par ailleurs la variété de Poisson caractéristique comme l'ensemble des zéros communs de l'idéal obtenu par quotient en annulant le paramètre de déformation dans l'annulateur de la représentation déformée. Nous montrons à l'aide du théorème de Gabber l'involutivité de la variété caractéristique. La variété de Poisson caractéristique est une sous-variété de Poisson de la variété de Poisson sous-jacente. Nous explicitons la variété caractéristique dans plusieurs exemples, incluant le dual des algèbres de Lie résolubles exponentielles. Dans le cas nilpotent nous montrons que toute orbite coadjointe est la

  18. La médecine générale perçue par les étudiants de la faculté de médecine de Sousse (Tunisie)

    PubMed Central

    Zedini, Chekib; Limam, Manel; El Ghardallou, Mariem; Mallouli, Menel; Mestiri, Tarek; Bougmiza, Iheb; Ajmi, Thouraya; Mtiraoui, Ali

    2014-01-01

    Introduction Les étudiants en début du cursus suivent la même formation hospitalo-universitaire, cependant, ils sont peu nombreux à choisir délibérément la médecine générale comme discipline d'exercice médical. Notre objectif est de préciser auprès des étudiants en médecine, les facteurs qui déterminent le choix de la médecine générale comme carrière et leur vision de cette discipline. Méthodes Etude descriptive transversale menée auprès d'un échantillon d’étudiants inscrits à la faculté de médecine de Sousse (Tunisie) pour l'année universitaire 2012-2013. Le recueil des données a été pratiqué par l'intermédiaire d'un questionnaire conçu pour les fins de ce travail. La saisie et l'analyse des données ont été effectuées par le logiciel SPSS 18.0. Résultats Notre étude a porté sur 388 étudiants dont 69,5% étaient du genre féminin. L’âge moyen était de 22,1 ± 2,8 ans. Cent étudiants (25,8%) avaient un parent cadre de santé sans que cela n'ait une influence sur le choix de carrière. A l'entrée à la faculté, seulement 7,1% (n = 27) voulaient faire de la médecine générale leur carrière. Le changement de choix vers la médecine générale est statistiquement différent à l'entrée et à la sortie de la faculté chez les internes finissants. Conclusion Afin d'attirer davantage les étudiants vers la médecine générale, il serait judicieux d'adopter des changements majeurs touchant l'enseignement théorique et pratique et de modifier les conditions de travail en fonction des attentes des générations futures. PMID:25852793

  19. Ampleur et impact des évènements indésirables graves liés aux soins: étude d'incidence dans un hôpital du Centre-Est tunisien

    PubMed Central

    Bouafia, Nabiha; Bougmiza, Iheb; Bahri, Fathi; Letaief, Mondher; Astagneau, Pascal; Njah, Mansour

    2013-01-01

    Introduction La prévention des événements indésirables représente une priorité de santé du fait de leur fréquence et de leur gravité potentielle. Ce travail a été mené afin d'avoir un diagnostic de la situation épidémiologique relative aux événements indésirables survenant dans notre hôpital. Méthodes Une étude prospective a été menée auprès de tous les patients qui ont été hospitalisés au CHU Farhat Hached - Sousse (Tunisie) sur une période d'un mois dans quatorze services de l'hôpital. La détection d'évènement indésirable grave (EIG) était basée sur les critères adoptés dans différentes études. Les tests T et Chi 2 ont été utilisés pour identifier les facteurs contribuant à l'apparition d'évènements indésirables. Résultats Au total, 162 EIG ont été identifiés pendant la période. 45% de ces évènements étaient des infections nosocomiales. Ces EIG ont eu comme conséquences un décès chez 9,2% des patients, la mise en jeu du pronostic vital de 26% des patients et la prolongation de la durée de séjour chez 61,7% d'entre eux. L'admission dans des circonstances particulières et l'exposition à des soins invasifs étaient identifiés comme des facteurs de risque potentiels EIG. Conclusion Le renforcement de la stratégie de gestion des risques sanitaires en ciblant préférentiellement le risque infectieux constitue une étape fondamentale dans l'amélioration de la sécurité des patients au sein de notre établissement de santé. PMID:24711868

  20. Les perceptions des femmes tunisiennes selon le modèle des croyances liées à la santé et leurs pratiques relativement à l'ostéoporose

    PubMed Central

    Belgacem, Amina; Nouira, Amel; Soussi, Sonia

    2016-01-01

    Introduction L'étude a pour objectif de décrire les croyances des femmes et leurs pratiques liées à la santé et à l'ostéoporose, afin d'élaborer des interventions efficaces et ciblées pour la prévention de cette maladie dans le contexte tunisien. Méthodes Une étude descriptive transversale a été effectuée auprès de 100 femmes tunisiennes, âgées de 45 ans et plus, qui consultent au centre de santé de base d'une zone périurbaine de la région de Sousse (Tunisie). La collecte de l'information a été réalisée à l'aide de « l'échelle des croyances relatives à la santé sur l'ostéoporose» développée par Kim et ses collègues traduit en arabe et validé en Tunisie et le questionnaire de «Calcul des apports calciques quotidiens» développé par Fardellone Patrice. L'interprétation des résultants s'est basée sur le «Health Belief Model ». Résultats La perception des participantes pourrait être considérée comme au dessus de la moyenne pour la vulnérabilité de l'ostéoporose (58%), la gravité de la maladie, les avantages de la pratique de l'activité physique, les avantages de l'apport en calcium et la motivation à la santé; par contre, elle pourrait être considérée comme modérée concernant les obstacles à la prévention. Cependant, les pratiques exposant au risque de la maladie sont relativement fréquentes et ceci essentiellement en rapport avec des facteurs socio-économiques et culturels. Conclusion Les programmes de promotion doivent viser la création d'un environnement physique et social favorable à l'adoption des comportements à moindre risque et viser l'éducation ciblée de la population. PMID:27217868

  1. Accessory Mineral U-Pb Ti-Zr Thermochronology of the Deep Crust of Zealandia: Rift, Breakup and Drift from 90-20 Ma

    NASA Astrophysics Data System (ADS)

    Beinlich, A.; Palin, J.; Cooper, A. F.

    2006-12-01

    Cenozoic alkaline mafic volcanics of eastern Otago were made famous in classic petrology and petrography texts coauthored by Francis Turner. Several locales have yielded mantle and crustal xenoliths including the Pigroot "mafic phonolite". Here, among abundant spinel lherzolite xenoliths, we discovered an undeformed cumulate gabbro composed of intermediate plagioclase and pargasitic amphibole with augite, ilmenite, magnetite, titanite (sphene) and accessory zircon and apatite. Major and trace elements indicate the rock crystallised from primitive alkaline magma, whereas the mineral assemblage indicates equilibration under amphibolite facies conditions at 5-9 kbar. Accessory mineral U-Pb Ti-Zr thermochronology by LA-ICP-MS on grain separates and in thin section reveals a T-t path that began with zircon crystallisation at 90±2 Ma (^{208}Pb-corrected 206Pb/238U, n=37, mswd=9.9) and 710±20°C (Ti-zircon geothermometer of Watson et al. 2006). Titanite dates (207Pb-corrected 206Pb/238U, n=49) and temperatures (Zr-titanite geothermometer of Hayden et al. 2006 at 7 kbar) form a linear array (r2=0.6) extending from 85 Ma, 830°C to 34 Ma, 760°C. The slope of this T-t array is inconsistent with diffusive loss of Pb and Zr from titanite (Cherniak, pers.comm.) and, together with REE data and reaction textures, indicates prolonged growth at the expense of plagioclase and ilmenite. Apatite U-Pb isotope data projected from the measured 207Pb/206Pb in plagioclase give a lower intercept age of 20±3 Ma (n=17, mswd=1.5) which overlaps the K-Ar age of the phonotephrite host lava (Coombs, pers.comm.). This remarkable xenolith records 1) crystallisation of alkaline mafic magma in the deep crust during early rifting of Zealandia from Gondwana around 90 Ma, 2) heating during continued lithospheric thinning 90-85 Ma, 3) slow cooling (≤2°C/my) for 50 my following continental breakup at 85 Ma, and 4) transport to the surface and thermal quenching at 20 Ma. Slow cooling of the deep

  2. Homologues of Genetic Transformation DNA Import Genes Are Required for Rhodobacter capsulatus Gene Transfer Agent Recipient Capability Regulated by the Response Regulator CtrA

    PubMed Central

    Brimacombe, Cedric A.; Ding, Hao; Johnson, Jeanette A.

    2015-01-01

    ABSTRACT Gene transfer agents (GTAs) morphologically resemble small, double-stranded DNA (dsDNA) bacteriophages; however, their only known role is to package and transfer random pieces of the producing cell genome to recipient cells. The best understood GTA is that of Rhodobacter capsulatus, termed RcGTA. We discovered that homologues of three genes involved in natural transformation in other bacteria, comEC, comF, and comM, are essential for RcGTA-mediated gene acquisition. This paper gives genetic and biochemical evidence that RcGTA-borne DNA entry into cells requires the ComEC and ComF putative DNA transport proteins and genetic evidence that putative cytoplasmic ComM protein of unknown function is required for recipient capability. Furthermore, the master regulator of RcGTA production in <1% of a cell population, CtrA, which is also required for gene acquisition in recipient cells, is expressed in the vast majority of the population. Our results indicate that RcGTA-mediated gene transfer combines key aspects of two bacterial horizontal gene transfer mechanisms, where donor DNA is packaged in transducing phage-like particles and recipient cells take up DNA using natural transformation-related machinery. Both of these differentiated subsets of a culture population, donors and recipients, are dependent on the same response regulator, CtrA. IMPORTANCE Horizontal gene transfer (HGT) is a major driver of bacterial evolution and adaptation to environmental stresses. Traits such as antibiotic resistance or metabolic properties can be transferred between bacteria via HGT; thus, HGT can have a tremendous effect on the fitness of a bacterial population. The three classically described HGT mechanisms are conjugation, transformation, and phage-mediated transduction. More recently, the HGT factor GTA was described, where random pieces of producing cell genome are packaged into phage-like particles that deliver DNA to recipient cells. In this report, we show that transport of

  3. The Tohoku Medical Megabank Project: Design and Mission

    PubMed Central

    Kuriyama, Shinichi; Yaegashi, Nobuo; Nagami, Fuji; Arai, Tomohiko; Kawaguchi, Yoshio; Osumi, Noriko; Sakaida, Masaki; Suzuki, Yoichi; Nakayama, Keiko; Hashizume, Hiroaki; Tamiya, Gen; Kawame, Hiroshi; Suzuki, Kichiya; Hozawa, Atsushi; Nakaya, Naoki; Kikuya, Masahiro; Metoki, Hirohito; Tsuji, Ichiro; Fuse, Nobuo; Kiyomoto, Hideyasu; Sugawara, Junichi; Tsuboi, Akito; Egawa, Shinichi; Ito, Kiyoshi; Chida, Koichi; Ishii, Tadashi; Tomita, Hiroaki; Taki, Yasuyuki; Minegishi, Naoko; Ishii, Naoto; Yasuda, Jun; Igarashi, Kazuhiko; Shimizu, Ritsuko; Nagasaki, Masao; Koshiba, Seizo; Kinoshita, Kengo; Ogishima, Soichi; Takai-Igarashi, Takako; Tominaga, Teiji; Tanabe, Osamu; Ohuchi, Noriaki; Shimosegawa, Toru; Kure, Shigeo; Tanaka, Hiroshi; Ito, Sadayoshi; Hitomi, Jiro; Tanno, Kozo; Nakamura, Motoyuki; Ogasawara, Kuniaki; Kobayashi, Seiichiro; Sakata, Kiyomi; Satoh, Mamoru; Shimizu, Atsushi; Sasaki, Makoto; Endo, Ryujin; Sobue, Kenji; Yamamoto, Masayuki

    2016-01-01

    The Great East Japan Earthquake (GEJE) and resulting tsunami of March 11, 2011 gave rise to devastating damage on the Pacific coast of the Tohoku region. The Tohoku Medical Megabank Project (TMM), which is being conducted by Tohoku University Tohoku Medical Megabank Organization (ToMMo) and Iwate Medical University Iwate Tohoku Medical Megabank Organization (IMM), has been launched to realize creative reconstruction and to solve medical problems in the aftermath of this disaster. We started two prospective cohort studies in Miyagi and Iwate Prefectures: a population-based adult cohort study, the TMM Community-Based Cohort Study (TMM CommCohort Study), which will recruit 80 000 participants, and a birth and three-generation cohort study, the TMM Birth and Three-Generation Cohort Study (TMM BirThree Cohort Study), which will recruit 70 000 participants, including fetuses and their parents, siblings, grandparents, and extended family members. The TMM CommCohort Study will recruit participants from 2013 to 2016 and follow them for at least 5 years. The TMM BirThree Cohort Study will recruit participants from 2013 to 2017 and follow them for at least 4 years. For children, the ToMMo Child Health Study, which adopted a cross-sectional design, was also started in November 2012 in Miyagi Prefecture. An integrated biobank will be constructed based on the two prospective cohort studies, and ToMMo and IMM will investigate the chronic medical impacts of the GEJE. The integrated biobank of TMM consists of health and clinical information, biospecimens, and genome and omics data. The biobank aims to establish a firm basis for personalized healthcare and medicine, mainly for diseases aggravated by the GEJE in the two prefectures. Biospecimens and related information in the biobank will be distributed to the research community. TMM itself will also undertake genomic and omics research. The aims of the genomic studies are: 1) to construct an integrated biobank; 2) to return genomic

  4. Brain modules of hallucination: an analysis of multiple patients with brain lesions

    PubMed Central

    Braun, Claude M.J.; Dumont, Mathieu; Duval, Julie; Hamel-Hébert, Isabelle; Godbout, Lucie

    2003-01-01

    patients sont conscients de la nature hallucinatoire de leur expérience, mais non habituellement de «centres oniriques» comme le propose Lhermitte. Nous proposons plutôt de considérer le rêve comme un cas spécial de «neurolibération». PMID:14631455

  5. La fin du jeûne?

    PubMed Central

    Naugler, Christopher; Sidhu, Davinder

    2014-01-01

    Résumé Objectif Présenter une mise à jour sur l’utilité clinique de ne pas être à jeun par rapport à l’être pour l’analyse des lipides dans le but d’améliorer l’observance par les patients, leur sécurité et l’évaluation clinique dans les tests du cholestérol. Qualité des données Les recommandations sont classées comme étant fondées sur des données probantes fortes, acceptables ou faibles (conflictuelles ou insuffisantes), selon les classifications adoptées par le Groupe d’étude canadien sur les soins de santé préventifs. Message principal Le dépistage de la dyslipidémie comme facteur de risque de coronaropathie et la prescription de médicaments hypolipidémiants sont des activités importantes en soins primaires. De récentes données probantes remettent en question la nécessité d’être à jeun pour la mesure des lipides. Dans des études sur la population, le cholestérol total, le cholestérol à lipoprotéines de haute densité et le cholestérol à lipoprotéines autres qu’à haute densité variaient tous d’en moyenne 2 % à jeun. Pour un dépistage de routine, la mesure du cholestérol sans être à jeun est maintenant une option de rechange raisonnable à l’analyse à jeun. Pour les patients diabétiques, l’exigence d’être à jeun peut représenter un important problème de sécurité en raison des possibilités d’hypoglycémie. Pour la surveillance des triglycérides et du cholestérol à lipoprotéines de basse densité chez les patients qui prennent des médicaments hypolipidémiants, le jeûne devient important. Conclusion Être à jeun pour la détermination routinière des niveaux lipidiques est largement inutile et il est improbable que le jeûne influence la stratification du risque clinique chez le patient, tandis que la mesure sans être à jeun pourrait améliorer l’observance par le patient et sa sécurité.

  6. Etude du strabisme chez des enfants de 0 à 15 ans suivis a Lubumbashi, République Démocratique du Congo: analyse des aspects épidémiologiques et cliniques

    PubMed Central

    Bienvenu, Yogolelo Asani; Angel, Musau Nkola; Sebastien, Mbuyi Musanzayi; Philippe, Cilundika Mulenga; Léon, Kabamba Ngombe; Eugene, Twite Kabange; Chami, Cham Lubamba; Prosper, Kalenga Muenze Kayamba; Claude, Speeg-Schatz; Gaby, Chenge Borasisi

    2015-01-01

    Introduction Le strabisme est défini comme un syndrome à double composante: motrice et sensorielle. Le but de ce travail est de décrire les aspects épidémiologiques et cliniques du strabisme chez l'enfant congolais de 0 à 15 ans dans la ville de Lubumbashi. Méthodes Il s'agit d'une étude descriptive longitudinale sur les aspects épidémiologiques et cliniques du strabisme chez l'enfant congolais de 0 à 15 ans dans la ville de Lubumbashi entre Décembre 2012 à Décembre 2013. Nous avons recueilli l’âge des patients, leur sexe, leur provenance, le type de strabisme, la réfraction, le fond d'oeil, les antécédents (hérédité) ainsi que le type de la déviation strabique observé sur 70 patients. Résultats Nous avons observé 70 cas de strabisme manifeste dont 31 cas (44,28%) étaient dans la tranche d’âge comprise entre 0 et 5 ans. L’âge moyen de nos patients était de 6,7 ans avec une prédominance du sexe féminin, soit 51,42%. Le strabisme était convergent dans 65,71%, divergent dans 30%, et vertical dans 4,28%. Les ésotropies représentaient 65 cas (92,85%), quatre cas (5,71%) avaient un antécédent familial de strabisme au premier degré de parenté, 21 cas (30%) au second degré de parenté, 45 cas (64,28%) n'avaient pas cet antécédent. L'oeil gauche était le plus dominé dans 30% des cas. Les facteurs favorisant le strabisme étaient inconnus dans 54 cas (77,14%). Le strabisme était secondaire à l'hypermétropie chez 32 patients (42,71%). Conclusion La fréquence du strabisme dans la ville de Lubumbashi chez les enfants âgés de 0 à 15 ans est de 0,50%. Comme dans la plupart des études sur le strabisme de l'enfant, c'est l’ésotropie qui est la déviation la plus commune. PMID:26834919

  7. Maladies reliées aux loisirs aquatiques

    PubMed Central

    Sanborn, Margaret; Takaro, Tim

    2013-01-01

    Résumé Objectif Passer en revue les facteurs de risque, la prise en charge et la prévention des maladies reliées aux loisirs aquatiques en pratique familiale. Sources des données Des articles originaux et de synthèse entre janvier 1998 et février 2012 ont été identifiés à l’aide de PubMed et des expressions de recherche en anglais water-related illness, recreational water illness et swimmer illness. Message principal Il y a un risque de 3 % à 8 % de maladies gastrointestinales (MGI) après la baignade. Les groupes à risque élevé de MGI sont les enfants de moins de 5 ans, surtout s’ils n’ont pas été vaccinés contre le rotavirus, les personnes âgées et les patients immunodéficients. Les enfants sont à plus grand risque parce qu’ils avalent plus d’eau quand ils nagent, restent dans l’eau plus longtemps et jouent dans l’eau peu profonde et le sable qui sont plus contaminés. Les adeptes des sports dans lesquels le contact avec l’eau est abondant comme le triathlon et le surf cerf-volant sont aussi à risque élevé et même ceux qui s’adonnent à des activités impliquant un contact partiel avec l’eau comme la navigation de plaisance et la pêche ont un risque de 40 % à 50 % fois plus grand de MGI par rapport à ceux qui ne pratiquent pas de sports aquatiques. Il y a lieu de faire une culture des selles quand on soupçonne une maladie reliée aux loisirs aquatiques et l’échelle clinique de la déshydratation est utile pour l’évaluation des besoins de traitement chez les enfants affectés. Conclusion Les maladies reliées aux loisirs aquatiques est la principale cause de MGI durant la saison des baignades. La reconnaissance que la baignade est une source importante de maladies peut aider à prévenir les cas récurrents et secondaires. On recommande fortement le vaccin contre le rotavirus chez les enfants qui se baignent souvent.

  8. Traitement par plasma thermique d'une liqueur caustique pour la destruction des cyanures

    NASA Astrophysics Data System (ADS)

    Fortin, Luc

    L'objectif principal de cette recherche est d'evaluer la possibilite de traiter le lixiviat de brasques usees produit par le procede LCL&L (Lixiviation a bas caustique et chaulage) par contact direct avec un jet de plasma thermique. L'utilisation d'un chalumeau au plasma permet d'eliminer les problemes de reaction avec les produits de combustion relies a l'utilisation de chalumeaux conventionnels (e.g. carbonatation du NaOH en Na2CO3). Le fait de se servir de ce type de chalumeau en mode submerge pour le traitement d'une solution liquide constitue l'originalite du projet. Les essais effectues dans le cadre de ce travail experimental sont realises a l'echelle banc d'essai dans un premier temps. Ils visent a determiner le taux de decomposition des cyanures contenus dans le lixiviat sous des conditions de plasma thermique en fonction de differents parametres et a faire la mise a l'echelle d'un reacteur pilote. La puissance electrique fournie au chalumeau, la temperature et la pression d'operation, le point d'addition d'eau, le volume de lixiviat traite et l'addition de peroxyde d'hydrogene (H2O2) comme co-reactif ont tous un impact sur le taux de destruction des cyanures trouve. Sous toutes les conditions etudiees, le reacteur plasma offre un taux de destruction plus rapide qu'un reacteur agite sous pression pour une meme concentration en cyanures. Ainsi, la comparaison de la constante cinetique obtenue pour le reacteur agite avec une constante similaire pour le reacteur plasma (pente du graphique -ln(C/C0) en fonction du temps) est de 0.04x10-3 s-1 vs 0.59x10-3 s-1 a 100°C et de 1.85x10-3 s-1' vs 3x10 -3 s-1s a 170°C. Ces resultats confirment que le plasma joue un role important sur la decomposition des cyanures et qu'il contribue a en augmenter le taux de destruction. Suite aux connaissances acquises sur le banc d'essai, un reacteur pilote est concu. Un chalumeau au plasma d'une puissance de 60 kW-150 kW et fonctionnant avec l'air comme gaz plasmagene y est

  9. Dissolution de la matiere lignocellulosique dans les liquides ioniques

    NASA Astrophysics Data System (ADS)

    Rebiere, Jeremy

    De nos jours, avec la raréfaction des ressources fossiles, le développement de procédés entrant dans le cadre de la chimie verte s'accentue. De plus, ces procédés utilisent comme ressources, des matériaux d'origine végétale, abondants et biodégradables. Au cours de ces 20 dernières années, la littérature utilisant les liquides ioniques (LI) connait une importante croissance. Ces solvants sont de plus en plus employés dans des réactions chimiques classiques. Cependant le coût de leur synthèse en fait un solvant réactionnel cher dont l'application en tant que tel dans l'industrie ne peut être raisonnablement envisagée. Ces liquides ioniques permettent la dissolution des matériaux lignocellulosiques (lignine ou cellulose) et possèdent des propriétés physico-chimiques intéressantes. Nous savons également que la dissolution de la cellulose par des procédés d'hydrolyse classique s'effectue dans des conditions dures, dues à la structure cristalline de la cellulose, (fortes concentrations en acide) qui paraissent limitées pour une utilisation à grande échelle. Il est donc nécessaire de rechercher des méthodes moins onéreuses et plus efficaces écologiquement. S'appuyant sur des recherches démontrant que la dissolution de la cellulose dans les LI, diminue la cristallinité de la cellulose, nous allons chercher à démontrer au cours de ces travaux, la possibilité d'utiliser les LI comme moyen de prétraitement pour la dissolution de la cellulose. Nous allons nous attacher à dissoudre la cellulose, et à étudier les proportions pouvant être dissoutes. Puis nous chercherons à récupérer puis à réutiliser ces LI. Enfin nous cherchons à caractériser les modifications apportées à notre cellulose. Mots Clés liquide ionique, cellulose, cristallinité, réactivité, dissolution, régénération, non-solvant, purification, prétraitement, zone amorphe.

  10. The Tohoku Medical Megabank Project: Design and Mission.

    PubMed

    Kuriyama, Shinichi; Yaegashi, Nobuo; Nagami, Fuji; Arai, Tomohiko; Kawaguchi, Yoshio; Osumi, Noriko; Sakaida, Masaki; Suzuki, Yoichi; Nakayama, Keiko; Hashizume, Hiroaki; Tamiya, Gen; Kawame, Hiroshi; Suzuki, Kichiya; Hozawa, Atsushi; Nakaya, Naoki; Kikuya, Masahiro; Metoki, Hirohito; Tsuji, Ichiro; Fuse, Nobuo; Kiyomoto, Hideyasu; Sugawara, Junichi; Tsuboi, Akito; Egawa, Shinichi; Ito, Kiyoshi; Chida, Koichi; Ishii, Tadashi; Tomita, Hiroaki; Taki, Yasuyuki; Minegishi, Naoko; Ishii, Naoto; Yasuda, Jun; Igarashi, Kazuhiko; Shimizu, Ritsuko; Nagasaki, Masao; Koshiba, Seizo; Kinoshita, Kengo; Ogishima, Soichi; Takai-Igarashi, Takako; Tominaga, Teiji; Tanabe, Osamu; Ohuchi, Noriaki; Shimosegawa, Toru; Kure, Shigeo; Tanaka, Hiroshi; Ito, Sadayoshi; Hitomi, Jiro; Tanno, Kozo; Nakamura, Motoyuki; Ogasawara, Kuniaki; Kobayashi, Seiichiro; Sakata, Kiyomi; Satoh, Mamoru; Shimizu, Atsushi; Sasaki, Makoto; Endo, Ryujin; Sobue, Kenji; Tohoku Medical Megabank Project Study Group, The; Yamamoto, Masayuki

    2016-09-01

    The Great East Japan Earthquake (GEJE) and resulting tsunami of March 11, 2011 gave rise to devastating damage on the Pacific coast of the Tohoku region. The Tohoku Medical Megabank Project (TMM), which is being conducted by Tohoku University Tohoku Medical Megabank Organization (ToMMo) and Iwate Medical University Iwate Tohoku Medical Megabank Organization (IMM), has been launched to realize creative reconstruction and to solve medical problems in the aftermath of this disaster. We started two prospective cohort studies in Miyagi and Iwate Prefectures: a population-based adult cohort study, the TMM Community-Based Cohort Study (TMM CommCohort Study), which will recruit 80 000 participants, and a birth and three-generation cohort study, the TMM Birth and Three-Generation Cohort Study (TMM BirThree Cohort Study), which will recruit 70 000 participants, including fetuses and their parents, siblings, grandparents, and extended family members. The TMM CommCohort Study will recruit participants from 2013 to 2016 and follow them for at least 5 years. The TMM BirThree Cohort Study will recruit participants from 2013 to 2017 and follow them for at least 4 years. For children, the ToMMo Child Health Study, which adopted a cross-sectional design, was also started in November 2012 in Miyagi Prefecture. An integrated biobank will be constructed based on the two prospective cohort studies, and ToMMo and IMM will investigate the chronic medical impacts of the GEJE. The integrated biobank of TMM consists of health and clinical information, biospecimens, and genome and omics data. The biobank aims to establish a firm basis for personalized healthcare and medicine, mainly for diseases aggravated by the GEJE in the two prefectures. Biospecimens and related information in the biobank will be distributed to the research community. TMM itself will also undertake genomic and omics research. The aims of the genomic studies are: 1) to construct an integrated biobank; 2) to return genomic

  11. Manipulation coherente de qubits de spin dans une boite quantique triple

    NASA Astrophysics Data System (ADS)

    Gaudreau, Louis

    Nous presentons dans cette these une etude detaillee du moment magnetique intrinseque de l'electron, i.e. le spin electronique, incluant la manipulation quantique coherente des etats de spin de trois electrons couples. A cette fin, nous utilisons des boites quantiques laterales pour confiner les electrons. Ces nano-structures, d'une grandeur autour de 1 pm, permettent de confiner un nombre precis d'electrons de facon controlee, allant jusqu'a zero electrons. Les developpements technologiques et d'ingeniosite durant la derniere decennie ont permis de coupler trois boites quantiques, ainsi l'interaction entre plusieurs electrons confines peut etre controlee comme par exemple le couplage quantique tunnel et l'interaction d'echange entre les spins de chacun d'entre eux. A l'aide de boites quantiques couplees, il est possible de realiser des experiences dans plusieurs domaines de la physique moderne : les etats up et down du spin des electrons confines peuvent etre utilisees comme etats quantiques binaires (qubits) dans le domaine de l'informatique quantique, la non-localite quantique peut etre testee en separant spatialement deux electrons enchevetres, il est possible de creer des 'courants de spin enchevetres' utiles en spintronique, et bien d'autres. La manipulation coherente des etats de spin du systeme a trois electrons se fait de facon purement electrique grace a des pulses a haute frequence qui permettent d'augmenter le couplage entre les electrons et de faire la mesure de l'etat resultant apres la manipulation. Nous utilisons l'interaction hyperfine entre les spins des electrons et ceux des noyaux du cristal dans lequel ils resident pour creer les rotations quantiques entre les etats, notamment les etats |Q +3/2> et (D+1/2>. Les resultats obtenus indiquent un temps de coherence de l'ordre de 10 ns. Ces experiences demontrent un niveau de controle sans precedant de boites quantiques triples et pavent la voie vers des nano-structures plus sophistiquees dans

  12. Adsorption of Phenol and Its Chlorine Derivatives on PILCS and Organo-PILCS

    NASA Astrophysics Data System (ADS)

    Tahani, A.; Karroua, M.; El Farissi, M.; Levitz, P.; van Damme, H.; Bergaya, F.; Margulies, L.

    1999-03-01

    Modification of smectite by highly charged inorganic polycations gives a type of materials called Pillared Clays (PILCS). These materials are also potential candidates for sorbents of compounds of agricultural interest , or of pollutants molecules in wastewater treatment. Modified PILCS by the cationic surfactant (BTDDMAC) or by its polar head, the benzyl trimethyl ammonium chloride (BTMAC), are used as sorbent supports for phenol and its chlorine derivatives, as pollutants molecules. The adsorption results of these organic molecules are compared to there adsorption on non treated PILCS. Generally, the organophilic nature of PILCS increases the adsorption of chlorophenols. The adsorption properties of phenol are considerably improved on BTMAC treated PILCS. La modification des smectites par les polycations inorganiques très fortement chargés donne des matériaux appelés argiles à piliers (PILCS). Ces matériaux sont potentiellement intéressants comme supports d'adsorption pour des molécules d'intérêt agronomique ou pour des molécules polluantes dans le cas du traitement des eaux usées. Les PILCS modifiés par un tensioactif cationique (BTDDMAC) ou par sa tête polaire, le chlorure de benzyl trimethyl ammonium (BTMAC) ont été utilisés comme supports d'adsorption du phénol et de ses dérivés chlorés. Les résultats d'adsorption de ces petites molécules organiques ont été comparés à leur adsorption sur des argiles à piliers non traitées (non organophiles). Globalement, la nature organophile des organo-PILCS accroit l'adsorption des chlorophénols. Les propriétés d'adsorption du phénol sont très nettement améliorées par le traitement des PILCS par le BTMAC.

  13. The experimental violation of Bell's inequality [as predicted by quantum mechanics]: A contribution to the study of its meaning

    NASA Astrophysics Data System (ADS)

    Hespel, Bertrand

    Au vu des expériences déjà réalisées, il est permis de penser que la violation de l'inégalité de Bell conformément aux prédictions de la mécanique quantique sera bientôt un fait établi. D'après les lectures qui en ont été le plus souvent données, en raison de la non- localité qu'il met en évidence et de l'incompatibilité qu'il y aurait entre cette propriété et celle de localité postulée par la relativité, ce fait annihilerait inéluctablement l'espoir qui animait le fondateur de la physique moderne et bon nombre de ses successeurs: à moins d'accepter d'abandonner l'exigence d'exactitude, nous devrions définitivement nous résoudre à admettre que nous ne pourrons jamais fournir du monde qu'une image incomplète. L'histoire de la philosophie suggère une toute autre interprétation. Lorsqu'on reconstitue les tentatives oubliées menées par Spinoza, Malebranche et Leibniz, pour bâtir, comme Newton, à la suite de Descartes, un Monde tout à la fois exact et complet, ce fait apparaît plutôt comme la preuve empirique que le monde est tout à la fois local et inséparable-phénoménalement local mais fondamentalement inséparable-et qu'une image adéquate ne pourra donc en être donnée qu'à la condition de reconnaître qu'il ne se réduit pas au contenu de l'espace-temps, c'est-à-dire que ce monde qui est l'objet de la physique n'est pas le tout du monde et qu'il convient de prolonger cette science, désormais quantique et relativiste, par une méta-physique.

  14. Electron irradiation of YBa2CU3O7 ceramics

    NASA Astrophysics Data System (ADS)

    Konczykowski, Marcin; Gilchrist, John

    1991-11-01

    Irradiation treatments generally have three effects on the superconducting properties of high T_c ceramics. The superconductivity of the grains is modified, as witnessed by a shift in T_c. The mixed-state properties of the grains are changed due to the additional pinning centres, and inter-granular links are modified by the accumulation of irradiation defects at the grain boundaries. These effects are discussed with particular reference to the irradiation of polycrystalline YBa2CU3O7 at low temperature with 2-3 MeV electrons, which initially produces a random distribution of Frenkel defects. We draw attention to several kinds of measurements which can be made in situ or after transferring the sample to a measuring cryostat : the transfer allows the defects to recombine or migrate. Various DC and AC measurement methods are compared, and the three effects of irradiation are demonstrated. The irreversibility line is found to shift with T_c. Les propriétés supraconductrices des céramiques à haut T_c, sont généralement influencées dans trois domaines distincts par les irradiations. D'une part la supraconductivité des grains est modifiée, comme en témoigne le changement de T_c. D'autre part les propriétés à l'état mixte des grains sont modifiées par la présence de nouveaux centres de piégeage. Enfin les liaisons inter-granulaires sont altérées par l'accumulation de défauts d'irradiation aux joints de grains. Nous insistons particulièrement sur l'irradiation de YBa2CU3O7 polycristallin à basse température avec des électrons de 2 à 3 MeV, ce qui produit, en premier lieu, des défauts de Frenkel à répartition aléatoire. Plusieurs types de mesures peuvent être faites soit in situ, soit après transfert de l'échantillon dans un cryostat de mesures: le transfert permet la recombinaison ou la migration des défauts. Différentes méthodes en courant continu et en alternatif sont comparées, et les effets de l'irradiation sur les trois domaines ci

  15. NITROGEN INTERACTIONS AND PHOTOSYNTHETIC RESPONSES TO CO{sub 2}: WORK PLAN FOR BIOCON EXPERIMENT/PHYSIOLOGICAL MEASUREMENTS AT CEDAR CREEK

    SciTech Connect

    ELLSWORTH,D.

    1998-12-31

    Nitrogen plays a critical role in photosynthetic function, which in turn can affect many ecosystem processes through its effects on plant growth and ecosystem carbon cycles. As a result of its central role in photosynthetic enzymes, leaf N status can affect the magnitude of photosynthetic enhancement by elevated CO{sub 2}. It is now well-recognized that species responses to elevated CO{sub 2} may be different when species are grown in isolation vs. in a mixed community. Part of this effect may result from effects on leaf N itself as a result of species competition for N in N-limited ecosystems, and pad of the effect is simply a function of dilution of leaf nutrients in leaves with greater carbohydrates as a result of elevated CO{sub 2}, However, photosynthetic efficiency itself may be affected if N-limited plants reallocate N within leaves away from carboxylation functions under elevated CO{sub 2} compared to ambient plants (Drake et al. 1997). Thus while there is cause to believe that there are interactive effects of N and CO{sub 2} on species photosynthetic physiology, there is little experimental data to support or reject this idea, particularly in realistic ecosystems under field conditions. Biotic interactions, most notably the presence of N-fixing plants, can affect ecosystem N stocks and carbon cycling via effects of N on photosynthetic function (Chapin et al. 1997, Hooper and Vitousek 1997). If photosynthetic responses of leaves and ecosystems are largely mediated through canopy N, then biotic as well as inorganic N sources will affect the magnitude of these responses. Under elevated CO{sub 2} there is evidence from the Swiss FACE experiment that growth and photosynthetic function are most responsive to CO{sub 2} in species mixtures including N-fixers (Hebeisin et al. 1997, Liischer et al. 1998, S.P. Long, pers. comm.). However, in that experiment there were confounding management factors and species diversity effects per se could not be tested. Still

  16. Origins and application of the European Union Position paper on dose response relationships between transportation noise and annoyance

    NASA Astrophysics Data System (ADS)

    Berry, Bernard F.

    2003-10-01

    Dose-response relationships of the sort pioneered by Schultz figure prominently in the current European noise regulation policy. A position paper developed by the Working Group on Dose-effects (part of the EU Expert Network) reviewed a range of potential health effects, but decided that annoyance and sleep disturbance remain the most prevalent and sensitive effects of transportation noise exposure, and those for which the best data were available. A Position paper providing guidance on the dose-effect relations to be used for the assessment of numbers of people annoyed by noise from transportation sources (rail, road and air) may be found at http://europa.eu.int/comm/environment/noise/home.htm This presentation explains the context in which the Paper was developed, outlines the process by which the dose-response relationships were derived and summarizes the key recommendations. Finally some observations are made as the Position Paper is being applied, and related future developments are discussed. The author acknowledges with deep gratitude the assistance of Dr. Henk Miedema of TNO in preparing this paper.

  17. Sur la nature des absorbeurs dans l'interpretation transactionnelle de la mecanique quantique

    NASA Astrophysics Data System (ADS)

    Boisvert, Jean-Sebastien

    L'interpretation transactionnelle de la mecanique quantique est l'une des plus recentes propositions de description des phenomenes du microcosme. En accord avec les predictions de la mecanique quantique standard, l'interpretation transactionnelle propose une alternative a celle de Copenhague. Son principal avantage est qu'elle permet de visualiser les mecanismes sous-jacents a l'echange d'energie, de quantite de mouvement ou d'autres quantites quantiques entre un emetteur et un absorbeur. Ces echanges sont le resultat, a l'instar de la theorie de l'absorbeur de Wheeler et Feynman, de l'utilisation autant d'ondes avancees que retardees. Bien que l'interpretation transactionnelle n'ait pas attire la plus grande attention scientifique, plusieurs critiques lui ont ete adressees. Dans les annees 1990, differentes experiences a mesure sans interaction ont ete concues. Depuis, il a ete avance que la version originale de l'interpretation transactionnelle pouvait difficilement rendre compte de ce type d'experience et meme qu'elle n'est pas compatible avec le concept d'univers quadridimensionnel. La recherche de ce memoire par article consiste a montrer que lorsque l'on utilise systematiquement l'interpretation transactionnelle en considerant la configuration totale des absorbeurs (incluant l'absorbeur universel), il n'est pas necessaire de faire appel a une hierarchie de transactions comme certains l'ont propose.

  18. Algorithmes et architectures pour ordinateurs quantiques supraconducteurs

    NASA Astrophysics Data System (ADS)

    Blais, Alexandre

    Depuis sa formulation, la theorie de l'information a ete basee, implicitement, sur les lois de la physique classique. Une telle formulation est toutefois incomplete puisqu'elle ne tient pas compte de la realite quantique. Au cours des vingt dernieres annees, l'expansion de la theorie de l'information englobant les effets purement quantiques a connu un interet grandissant. La realisation d'un systeme de traitement de l'information quantique, un ordinateur quantique, presente toutefois de nombreux defis. Dans ce document, on s'interesse a differents aspects concernant ces defis. On commence par presenter des concepts algorithmiques comme l'optimisation de calculs quantiques et le calcul quantique geometrique. Par la suite, on s'interesse au design et a differents aspects de l'utilisation de qubits bases sur les jonctions Josephson. En particulier, un nouveau design de qubit supraconducteur est suggere. On presente aussi une approche originale pour l'interaction entre qubits. Cette approche est tres generale puisqu'elle peut etre appliquee a differents designs de qubits. Finalement, on s'interesse a la lecture des qubits supraconducteurs de flux. Le detecteur suggere ici a l'avantage de pouvoir etre decouple du qubit lorsqu'il n'y a pas de mesure en cours.

  19. Vers des boites quantiques a base de graphene

    NASA Astrophysics Data System (ADS)

    Branchaud, Simon

    Le graphene est un materiau a base de carbone qui est etudie largement depuis 2004. De tres nombreux articles ont ete publies tant sur les proprietes electroniques, qu'optiques ou mecaniques de ce materiel. Cet ouvrage porte sur l'etude des fluctuations de conductance dans le graphene, et sur la fabrication et la caracterisation de nanostructures gravees dans des feuilles de ce cristal 2D. Des mesures de magnetoresistance a basse temperature ont ete faites pres du point de neutralite de charge (PNC) ainsi qu'a haute densite electronique. On trouve deux origines aux fluctuations de conductance pres du PNC, soit des oscillations mesoscopiques provenant de l'interference quantique, et des fluctuations dites Hall quantique apparaissant a plus haut champ (>0.5T), semblant suivre les facteurs de remplissage associes aux monocouches de graphene. Ces dernieres fluctuations sont attribuees a la charge d'etats localises, et revelent un precurseur a l'effet Hall quantique, qui lui, ne se manifeste pas avant 2T. On arrive a extraire les parametres caracterisant l'echantillon a partir de ces donnees. A la fin de cet ouvrage, on effectue des mesures de transport dans des constrictions et ilots de graphene, ou des boites quantiques sont formees. A partir de ces mesures, on extrait les parametres importants de ces boites quantiques, comme leur taille et leur energie de charge.

  20. La force de Casimir et les plasmons de surface

    NASA Astrophysics Data System (ADS)

    Intravaia, F.; Lambrecht, A.; Reynaud, S.

    2004-11-01

    La présence de fluctuations irréductibles de champ dans le vide est une prédiction importante de la théorie quantique. Ces fluctuations ont de nombreux effets bien connus, dont l'archétype est la force de Casimir apparaîssant entre deux miroirs placés dans le vide par suite de la pression de radiation du vide. Elle a été récemment mesurée avec une précision de l'ordre du %. De nombreux travaux sont consacrés à l'évaluation théorique de cette force en visant une précision du même ordre. Ici nous étudions la force de Casimir dans la configuration de deux miroirs métalliques plans parallèles à température nulle. En supposant les miroirs décrits par un modèle plasma nous interprétons la force de Casimir comme le résultat de l'interaction entre les plasmons de surface des deux miroirs.

  1. Influence of various land uses on windbreak selection by nesting Mississippi kites

    USGS Publications Warehouse

    Love, Diane; Grzybowski, Joseph A.; Knopf, Fritz L.

    1985-01-01

    Contemporary land-use practices have dramatically altered breeding habitats of birds of prey (Cramp, pp. 9-11 in World Conf. Birds of Prey, R. D. Chancellor, ed., ICPB, London, England, 1977). Some land uses appear to influence strongly both the nesting activity (White, Trans. North Am. Wild. Nat. Resour. Conf. 39:301-312, 1974) and abundance (Olendorff and Stoddart, pp. 44-48 in Management of Raptors, F. N. Jamerstrom, B. E. Harrel, and R. R. Olendorff, eds., Proc. Conf. Raptor Conserv. Tech., Raptor Rep. 2, Fort Collins, Colorado, 1974) of raptors. The Mississippi Kite (Ictinia mississippiensis) is a locally common raptor of the south-central plains of North America. In the prairie grasslands of western Oklahoma and south-western Kansas, kites commonly nest in tree plantings designed as windbreaks, irrespective of windbreak width, age, or tree species compositions (Parker, Ph.D. Diss., Univ. Kansas, Lawrence, Kansas, 1974; Love and Knopf, Proc. Ann. Meet. For. Comm. Great Plains Agric. Counc. 30:69-77, 1978). Much of the potential nesting habitat within this region, however, is not used by kits (Parker and Ogden, Am. Birds 33:119-129, 1979). In this paper, we assess the potential influence of various land-use practices on windbreak selection by nesting Mississippi Kites.

  2. Calibration and intercomparison of water vapor instrumentation used on the NSF/NCAR HIAPER aircraft

    NASA Astrophysics Data System (ADS)

    Kraemer, D.; Campos, T.; Flocke, F.; Jensen, J.; Wang, J.; Cole, H.; Korn, E.; Lauritsen, D.; Kraemer, M.

    2007-12-01

    Subject of the study is the characterization of a Kahn DCS-80 water vapor calibration system and the calibration of two water vapor sensors used on research aircraft, namely a Buck Instruments B-1001 chilled mirror sensor and a MayComm Tunable Diode Laser Absorption Hygrometer. A series of Vaisala drop sondes were also characterized and compared to the aircraft instruments. In an effort to assess the precision of the water vapor sensors that are being used on board the NSF/NACR GV aircraft (HIAPER), the instruments were tested at ambient pressure (800 mbar) inside an environmental chamber to simulate temperature conditions during flight. Tested dewpoints ranged from -70 to +20 degrees Celsius. The TDL - hygrometer was calibrated in preparation for an international water vapor measurement intercomparison campaign at the Forschungszentrum Karlsruhe, Germany. We will present the detailed calibration and characterization procedure, the laboratory setup for the different sensors, results from the calibrations of all instruments, assess their precision and useful operating range, and present some preliminary results from the international intercomparison campaign.

  3. Occupational exposure and its effect on some immune parameters

    SciTech Connect

    Tuschl, H.; Steger, F.; Kovac, R.

    1995-01-01

    Some immunological parameters were investigated in a group of workers exposed to external radiation (1.4 to 9.8 mSy) and inhalation of tritium (comm. eff. dose equiv. 1.2 to 2.8 mSv). The present investigations indicate the differential radiosensitivity of lymphocytic subsets: CD8 positive suppressor T cells were found to be the most sensitive subpopulation in the peripheral blood of radiation exposed workers. CD4/CD8 ratios were increased mainly due to an increase in absolute numbers of CD4 positive helper T cells indicating a selective cell renewal after irradiation. Results obtained after phytohaemugglutinin stimulation of lymphocytes showed individual variation, though there seems to be a trend towards an inverse correlation between absolute T cell numbers in peripheral blood and the number of S phases observed after stimulation, low T cell numbers leading to a high rate of stimulation. The calculation of the committed effective dose equivalents show that radiation protection against internal tritium contaminants should not be neglected. 21 refs., 3 figs., 5 tabs.

  4. Trajectory Assessment and Modification Tools for Next Generation Air Traffic Management Operations

    NASA Technical Reports Server (NTRS)

    Brasil, Connie; Lee, Paul; Mainini, Matthew; Lee, Homola; Lee, Hwasoo; Prevot, Thomas; Smith, Nancy

    2011-01-01

    This paper reviews three Next Generation Air Transportation System (NextGen) based high fidelity air traffic control human-in-the-loop (HITL) simulations, with a focus on the expected requirement of enhanced automated trajectory assessment and modification tools to support future air traffic flow management (ATFM) planning positions. The simulations were conducted at the National Aeronautics and Space Administration (NASA) Ames Research Centers Airspace Operations Laboratory (AOL) in 2009 and 2010. The test airspace for all three simulations assumed the mid-term NextGenEn-Route high altitude environment utilizing high altitude sectors from the Kansas City and Memphis Air Route Traffic Control Centers. Trajectory assessment, modification and coordination decision support tools were developed at the AOL in order to perform future ATFM tasks. Overall tool usage results and user acceptability ratings were collected across three areas of NextGen operatoins to evaluate the tools. In addition to the usefulness and usability feedback, feasibility issues, benefits, and future requirements were also addressed. Overall, the tool sets were rated very useful and usable, and many elements of the tools received high scores and were used frequently and successfully. Tool utilization results in all three HITLs showed both user and system benefits including better airspace throughput, reduced controller workload, and highly effective communication protocols in both full Data Comm and mixed-equipage environments.

  5. Characterization of human-dog social interaction using owner report.

    PubMed

    Lit, Lisa; Schweitzer, Julie B; Oberbauer, Anita M

    2010-07-01

    Dog owners were surveyed for observations of social behaviors in their dogs, using questions adapted from the human Autism Diagnostic Observation Schedule (ADOS) pre-verbal module. Using 939 responses for purebred and mixed-breed dogs, three factors were identified: initiation of reciprocal social behaviors (INIT), response to social interactions (RSPNS), and communication (COMM). There were small or no effects of sex, age, breed group or training. For six breeds with more than 35 responses (Border Collie, Rough Collie, German Shepherd, Golden Retriever, Labrador Retriever, Standard Poodle), the behaviors eye contact with humans, enjoyment in interactions with human interaction, and name recognition demonstrated little variability across breeds, while asking for objects, giving/showing objects to humans, and attempts to direct humans' attention showed higher variability across these breeds. Breeds with genetically similar backgrounds had similar response distributions for owner reports of dog response to pointing. When considering these breeds according to the broad categories of "herders" and "retrievers," owners reported that the "herders" used more eye contact and vocalization, while the "retrievers" used more body contact. Information regarding social cognitive abilities in dogs provided by owner report suggest that there is variability across many social cognitive abilities in dogs and offers direction for further experimental investigations. PMID:20438815

  6. Magnetized plasma flow through a small orifice

    NASA Astrophysics Data System (ADS)

    Gunn, J. P.

    2001-03-01

    Deuterium plasma flow through a circular hole in a flat conducting plate is simulated by the two-dimensional object-oriented particle-in-cell code (XOOPIC) [J. P. Verboncoeur, A. B. Langdon, and N. T. Gladd, Comp. Phys. Comm. 87, 199 (1995)]. A constant magnetic field is oriented perpendicular to the plate surface, and parallel to the cylindrical axis of the hole. Charge neutralization on the interior surface of the hole leads to attenuation of the ion current throughput. The attenuation is stronger than would be expected from a finite Larmor radius model, due to acceleration of ions by the self-consistent radial electric field. The current attenuation has been measured by comparing two Langmuir probes that were operated simultaneously under a wide range of plasma conditions in Tore Supra [Equipe Tore Supra, IAEA-CN-64/02-2, International Atomic Energy Agency, Vienna, p. I-41 (1996)]. One probe was exposed directly to the plasma and the other was hidden behind a graphite shield pierced with either 3 or 4 mm diameter holes. Both the ion current attenuation and the floating potential drop are in reasonable agreement with the simulation results.

  7. Exploring New Phenomena in Salty Water Under Planetary Conditions

    NASA Astrophysics Data System (ADS)

    Goncharov, A. F.; Bove, L. E.; Klotz, S.; Gaal, R.; Saitta, A. M.; Gillet, P.

    2015-12-01

    Compressed water is overspread on Earth at depth and in the extra-terrestrial space, both interstellar and on outer planets and moons (ice bodies) [1]. Under the conditions experienced in these celestial bodies water displays an incredibly rich phase diagram, including sixteen known crystalline phases, three amorphous ones, and predicted exotic properties like plasticity [2], ionization [3], and superionicity [4]. In this talk I will review our recent experimental results on salty (LiCl, NaCl, MgCl2) water under extreme conditions including: plasticity [5], pressure-induced polyamorphism [6], salty ice crystallization under high pressure [7], and hydrogen bond symmetrisation at Mbar pressures [8]. [1] De Pater, I., and Lissauer, J.J. Planetary Sciences. Cambridge University Press (2004). [2] Wang, Y., Liu, H., et al. Nat. Comm. 563 1566 (2011).[3] Aragones, L., and Vega, C., J. Chem. Phys. 130, 244504 (2009).[4] Cavazzoni, C., et al., Science 283, 44-46 (1999).[5] Bove, L. E., Dreyfus, C. et al., JCP 139, 044501 (2013) ; Ruiz, G. N., Bove, L. E. et al., PCCP 16 18553-18562 (2014).[6] Bove, L. E., Klotz, S. et al., Phys. Rev. Lett. 106, 125701 (2011); Ludl, A. A., Bove, L. E. et al., PCCP 17, 14054 (2015). [7] Klotz, S., Bove, L. E. t al., Nat. Mat. 8, 405 (2009) ; Ludl A. A., Bove, L. E., submitted (2015).[8] Bove L. E. , Gaal, R. et al., PNAS 112, 27 (2015).

  8. Flexible Airspace Management (FAM) Research 2010 Human-in-the-Loop Simulation

    NASA Technical Reports Server (NTRS)

    Lee, Paul U.; Brasil, Connie; Homola, Jeffrey; Kessell, Angela; Prevot, Thomas; Smith, Nancy

    2011-01-01

    A human-in-the-Ioop (HITL) simulation was conducted to assess potential user and system benefits of Flexible Airspace Management (FAM) concept, as well as designing role definitions, procedures, and tools to support the FAM operations in the mid-term High Altitude Airspace (HAA) environment. The study evaluated the benefits and feasibility of flexible airspace reconfiguration in response to traffic overload caused by weather deviations, and compared them to those in a baseline condition without the airspace reconfiguration. The test airspace consisted of either four sectors in one Area of Specialization or seven sectors across two Areas. The test airspace was assumed to be at or above FL340 and fully equipped Vvith data communications (Data Comm). Other assumptions were consistent with those of the HAA concept. Overall, results showed that FAM operations with multiple Traffic Management Coordinators, Area Supervisors, and controllers worked remarkably well. The results showed both user and system benefits, some of which include the increased throughput, decreased flight distance, more manageable sector loads, and better utilized airspace. Also, the roles, procedures, airspace designs, and tools were all very well received. Airspace configuration options that resulted from a combination of algorithm-generated airspace configurations with manual modifications were well acceptec and posed little difficuIty and/or workload during airspace reconfiguration process. The results suggest a positive impact of FAM operations in HAA. Further investigation would be needed to evaluate if the benefits and feasibility would extend in either non-HAA or mixed equipage environment.

  9. Geologic evaluation of the Oasis Valley basin, Nye County, Nevada

    SciTech Connect

    Fridrich, C.J.; Minor, S.A.; and Mankinen, E.A.

    2000-01-13

    This report documents the results of a geologic study of the area between the underground-nuclear-explosion testing areas on Pahute Mesa, in the northwesternmost part of the Nevada Test Site, and the springs in Oasis Valley, to the west of the Test Site. The new field data described in this report are also presented in a geologic map that is a companion product(Fridrich and others, 1999) and that covers nine 7.5-minute quadrangles centered on Thirsty Canyon SW, the quadrangle in which most of the Oasis Valley springs are located. At the beginning of this study, published detailed maps were available for 3 of the 9 quadrangles of the study area: namely Thirsty Canyon (O'Connor and others, 1966); Beatty (Maldonado and Hausback, 1990); and Thirsty Canyon SE (Lipman and others, 1966). Maps of the last two of these quadrangles, however, required extensive updating owing to recent advances in understanding of the regional structure and stratigraphy. The new map data are integrated in this re port with new geophysical data for the Oasis Valley area, include gravity, aeromagnetic, and paleomagnetic data (Grauch and others, 1997; written comm., 1999; Mankinen and others, 1999; Hildenbrand and others, 1999; Hudson and others, 1994; Hudson, unpub. data).

  10. DISCOURS QUI RÉSISTENT À L’OBJECTIVATION : QUE PEUT-ON EN TIRER POUR L’ÉVALUATION?

    PubMed Central

    Brousselle, Astrid

    2013-01-01

    Résumé L’évaluateur doit porter attention aux distorsions qu’il contribue à créer lorsqu’il utilise l’entrevue comme méthode de collecte de données. L’évaluation est un exercice politique qui, placé dans un contexte politique, peut favoriser l’émergence de discours de résistance à l’objectivation. À partir des entrevues que nous avons effectuées lors de l’évaluation du processus d’implantation de l’initiative ONUSIDA d’accès aux médicaments au Chili, nous illustrons différentes tactiques que les acteurs utilisent et qui peuvent soit attirer la sympathie de l’évaluateur, soit faire obstacle à son besoin d’information. Nous présentons une méthode d’analyse que l’évaluateur peut utiliser pour redonner du sens aux discours de résistance. PMID:23997421

  11. Griffe cubitale d'origine lépreuse traitée par transfert tendineux de Lasso Zancolli: à propos d'un cas

    PubMed Central

    El Alaoui, Adil; Sbiyaa, Mouhcine; Bah, Aliou; Rabhi, Ilyas; mezzani, Amine; Marzouki, Amine; Boutayeb, Fawzi

    2015-01-01

    La lèpre est une maladie infectieuse due à une mycobactérie (M. Leprae, Bacille de Hansen, ou BH) dont le tropisme nerveux est destructeur pour les cellules de Schwann. La localisation préférentielle des neuropathies tronculaire secondaire à la lèpre restent dominé par les zones ou les troncs nerveux traversent les défilés ostéo-ligamentaires inextensibles comme le défilé rétro-épitrochléen ou passe le nerf ulnaire. De nombreux travaux ont été consacrés à la souffrance nerveuse secondaire à la lèpre et surtout l'atteinte du nerf ulnaire qui se manifeste par une griffe des doigts. Le traitement dans ce cas est palliatif et fait appel à plusieurs techniques décrites dans la littérature. Nous rapportons dans ce travail un cas de griffe cubitale chez un patient lépreux traité par transfert tendineux de Lasso Zancolli. PMID:26985277

  12. Léiomyome vésical entraînant la destruction d'un rein

    PubMed Central

    Kehila, Mehdi; Mekni, Karima; Abouda, Hassine Saber; Chtourou, Maher; Zeghal, Dorra; Chanoufi, Mohamed Badis

    2016-01-01

    Le léiomyome de la vessie est une tumeur bénigne rare réputée avoir un bon pronostic après traitement chirurgical. Ceci n'est malheureusement pas toujours vrai. Nous rapportons le cas d'une patiente âgée de 33 ans qui a consulté pour des douleurs lombaires droites. Les explorations réalisées ont conclu à une tumeur solide du plancher vésical avec, en amont, un rein droit non fonctionnel et des voies urinaires gauches dilatées. La cystoscopie a objectivé une tumeur solide de la vessie périméatique droite. Des biopsies tumorales ont été faites en même temps qu'une montée de sonde double J gauche. L’étude anatomopathologique a conclu à un léiomyome vésical. Elle a eu une myomectomie par voie transvésicale. Les suites opératoires étaient simples. La patiente a toutefois gardé comme séquelle un rein totalement détruit.

  13. Portage vaginal du streptocoque du groupe B chez la femme enceinte au niveau de la région de Marrakech

    PubMed Central

    Bassir, Ahlam; Dhibou, Hanane; Farah, Majdi; Mohamed, Lharmis; Amal, Addebous; Nabila, Souraa; Abderahim, Aboulfalah; Asmouki, Hamid; Soummani, Abderraouf

    2016-01-01

    Introduction Le streptocoque du groupe B est le principal agent impliqué dans les infections materno-fœtales, les septicémies et les méningites du nouveau-né à terme. L'objectif est de déterminer le taux de portage maternel du streptocoque du groupe B (SGB) à terme. Méthodes Un prélèvement vaginal a été réalisé de manière prospective chez 275 parturientes lors de l'entrée en salle d'accouchement sur une période de 06 mois. Résultats Le taux de portage était de 20,2%. Le portage était variable en fonction de l’âge gestationnel, il constitue 57.5% entre 37 et 38 semaines d'aménorrhée. Aucun des facteurs de risque n'a était statistiquement prédictif du portage maternel du SGB. Conclusion Le dépistage doit être réalisé à partir de 37 semaines d'aménorrhée, et comme le portage est intermittent, un prélèvement négatif ne garantirait pas que le portage soit négatif à l'accouchement. PMID:27222693

  14. Petite Amateur Navy Satellite (PANSAT)

    NASA Technical Reports Server (NTRS)

    Sakoda, D.; Hiser, J. K.

    1989-01-01

    The Naval Postgraduate School's (NPS) Space Systems Academic Group (SSAG) is designing and developing a small communications satellite for launch aboard the shuttle as a complex autonomous payload (CAP). The objectives of PANSAT are three-fold. First, PANSAT will provide an ideal educational tool for the officer students at NPS supporting Space Systems Engineering and Space Systems Operations with hands-on hardware development. Second, the satellite will provide digital store-and-forward communications, or packet radio, for the amateur radio community. The third objective is to provide a low-cost, space-based platform for small experiments. PANSAT will be launched from the shuttle at a nominal altitude of 200 n.m. and an inclination of at least 37 degrees. The satellite weight is 150 lbs. Since there is no attitude control, eight dipole whip antennas will be used to provide isotropic ground coverage for communications. FM digital communications will be used with up-link and down-link on a single frequency in the amateur band of 437.25 MHz. A maximum 50 kHz of bandwidth is envisioned for the satellite. The expected lifetime of the satellite is 1 1/2 to 2 years before atmospheric reentry. The PANSAT design consists of the following: communications subsystem (COMM); computer, or data processor and sequencer (DP&S); power subsystem; structure subsystem; and experiment payload.

  15. Singularity formation for Prandtl’s equations

    NASA Astrophysics Data System (ADS)

    Gargano, F.; Sammartino, M.; Sciacca, V.

    2009-10-01

    We consider Prandtl’s equations for an impulsively started disk and follow the process of the formation of the singularity in the complex plane using the singularity tracking method. We classify Van Dommelen and Shen’s singularity as a cubic root singularity. We introduce a class of initial data, uniformly bounded in H1, which have a dipole singularity in the complex plane. These data lead to a solution blow-up whose time can be made arbitrarily short within the class. This is numerical evidence of the ill-posedness of the Prandtl equations in H1. The presence of a small viscosity in the streamwise direction changes the behavior of the singularities. They stabilize at a distance from the real axis which depends on the amount of viscosity. We show that the Van Dommelen and Shen singularity and the singularity predicted by E and Engquist in [W. E, B. Engquist, Blowup of the solutions to the unsteady Prandtl’s equations, Comm. Pure Appl. Math. 50 (1997) 1287-1293.] have different complex structures.

  16. Le sumatriptan intranasal pour la migraine chez les enfants

    PubMed Central

    Goldman, Ran D.; Meckler, Garth D.

    2015-01-01

    Résumé Question Je vois de plus en plus d’enfants et d’adolescents qui souffrent de céphalées pouvant se classer dans la catégorie des migraines. J’ai fait des lectures sur le sumatriptan par voie intranasale comme thérapie abortive. Est-ce un traitement efficace? Réponse La migraine aiguë chez les enfants et les adolescents est fréquente et difficile à traiter. Le sumatriptan intranasal est une option sûre et généralement efficace pour les enfants et les adolescents. La dose actuellement recommandée est de 20 mg pour les enfants qui pèsent plus de 40 kg et de 10 mg pour ceux dont le poids se situe entre 20 et 39 kg. Il faudrait faire des études de plus grande envergure pour contrecarrer les limitations des échantillons de petite taille et mieux comprendre la faible concentration plasmique et les effets placebo observés dans les études jusqu’à présent.

  17. The crystal chemistry of inorganic metal borohydrides and their relation to metal oxides.

    PubMed

    Černý, Radovan; Schouwink, Pascal

    2015-12-01

    The crystal structures of inorganic homoleptic metal borohydrides are analysed with respect to their structural prototypes found amongst metal oxides in the inorganic databases such as Pearson's Crystal Data [Villars & Cenzual (2015). Pearson's Crystal Data. Crystal Structure Database for Inorganic Compounds, Release 2014/2015, ASM International, Materials Park, Ohio, USA]. The coordination polyhedra around the cations and the borohydride anion are determined, and constitute the basis of the structural systematics underlying metal borohydride chemistry in various frameworks and variants of ionic packing, including complex anions and the packing of neutral molecules in the crystal. Underlying nets are determined by topology analysis using the program TOPOS [Blatov (2006). IUCr CompComm. Newsl. 7, 4-38]. It is found that the Pauling rules for ionic crystals apply to all non-molecular borohydride crystal structures, and that the latter can often be derived by simple deformation of the close-packed anionic lattices c.c.p. and h.c.p., by partially removing anions and filling tetrahedral or octahedral sites. The deviation from an ideal close packing is facilitated in metal borohydrides with respect to the oxide due to geometrical and electronic considerations of the BH4(-) anion (tetrahedral shape, polarizability). This review on crystal chemistry of borohydrides and their similarity to oxides is a contribution which should serve materials engineers as a roadmap to design new materials, synthetic chemists in their search for promising compounds to be prepared, and materials scientists in understanding the properties of novel materials. PMID:26634719

  18. Complementary surface charge for enhanced capacitive deionization.

    PubMed

    Gao, X; Porada, S; Omosebi, A; Liu, K-L; Biesheuvel, P M; Landon, J

    2016-04-01

    Commercially available activated carbon cloth electrodes are treated using nitric acid and ethylenediamine solutions, resulting in chemical surface charge enhanced carbon electrodes for capacitive deionization (CDI) applications. Surface charge enhanced electrodes are then configured in a CDI cell to examine their salt removal at a fixed charging voltage and both reduced and opposite polarity discharge voltages, and subsequently compared to the salt removal of untreated electrodes. Substantially improved salt removal due to chemical surface charge and the use of a discharge voltage of opposite sign to the charging voltage is clearly demonstrated in these CDI cycling tests, an observation which for the first time validates both enhanced CDI and extended-voltage CDI effects predicted by the Donnan model [Biesheuvel et al., Colloids Interf. Sci. Comm., 10.1016/j.colcom.2015.12.001 (2016)]. Our experimental and theoretical results demonstrate that the use of carbon electrodes with optimized chemical surface charge can extend the CDI working voltage window through discharge voltages of opposite sign to the charging voltage, which can significantly enhance the salt adsorption capacity of CDI electrodes. Thus, in addition to carbon pore size distribution, chemical surface charge in carbon micropores is considered foundational for salt removal in CDI cells. PMID:26878361

  19. Test of the movement expansion model: Anticipatory vowel lip protrusion and constriction in French and English speakers

    PubMed Central

    Noiray, Aude; Cathiard, Marie-Agnès; Ménard, Lucie; Abry, Christian

    2011-01-01

    The modeling of anticipatory coarticulation has been the subject of longstanding debates for more than 40 yr. Empirical investigations in the articulatory domain have converged toward two extreme modeling approaches: a maximal anticipation behavior (Look-ahead model) or a fixed pattern (Time-locked model). However, empirical support for any of these models has been hardly conclusive, both within and across languages. The present study tested the temporal organization of vocalic anticipatory coarticulation of the rounding feature from [i] to [u] transitions for adult speakers of American English and Canadian French. Articulatory data were synchronously recorded using an Optotrak for lip protrusion and a dedicated Lip-Shape-Tracking-System for lip constriction. Results show that (i) protrusion is an inconsistent parameter for tracking anticipatory rounding gestures across individuals, more specifically in English; (ii) labial constriction (between-lip area) is a more reliable correlate, allowing for the description of vocalic rounding in both languages; (iii) when tested on the constriction component, speakers show a lawful anticipatory behavior expanding linearly as the intervocalic consonant interval increases from 0 to 5 consonants. The Movement Expansion Model from Abry and Lallouache [(1995a) Bul. de la Comm. Parlée 3, 85–99; (1995b) Proceedings of ICPHS4, 152–155.] predicted such a regular behavior, i.e., a lawful variabilitywith a speaker-specific expansion rate, which is not language-specific. PMID:21303015

  20. Anévrysme de l'aorte thoracique d'origine traumatique: cas clinique suspect

    PubMed Central

    Bontolo, Faustin Mbangi; Mols, Pierre; Youatou, Pierre; Ramadan, Ahmed Sabri; Ngatchou, William

    2015-01-01

    Dans ce travail nous rapportons le cas d'un homme d'origine africaine du nord, âgé de 51 ans, qui s'est présenté à l'urgence pour des douleurs thoraciques constantes depuis un jour. Dans son anamnèse on note un enrouement de la voix depuis deux mois, une notion d'accident de circulation il y a environ dix ans. Patient sportif, fait de la boxe et travaille comme agent de sécurité dans une boite de nuit. La radiographie du thorax et l'angio-scanner thoracique montrent un volumineux anévrisme non compliqué de la crosse et du tiers distal de l'aorte thoracique descendante (7cmx7.8cm en vue axiale). Le patient a bénéficié d'une cure chirurgicale de ce volumineux anévrisme de l'aorte thoracique. Nous discutons des étiologies, des mesures cliniques et para cliniques qui permet le diagnostic de cette entité clinique rare pouvant être une erreur diagnostique pour un médecin urgentiste. PMID:26523181

  1. Observations and relocation of a West Indian Manatee (Trichechus manatus) off Bimini, The Bahamas

    USGS Publications Warehouse

    Melillo-Sweeting, Kelly; Reid, James P.; Gittens, Lester; Adimey, Nicole; Dillet, Jared Z.

    2011-01-01

    West Indian manatees (Trichechus manatus) are listed as vulnerable (IUCN Red List, 7 March 2009; Deutsch et al., 2008), with the subspecies Trichechus manatus latirostris and T. m. manatus (Florida and Antillean, respectively) considered endangered (IUCN Red List, 21 January 2011; Deutsch, 2008; Self-Sullivan & Mignucci-Giannoni, 2008). Manatees are not native to The Bahamas; however, sightings have been recorded periodically since 1904, with an increase in sightings documented in the 1990s (Lefebvre et al., 2001). In the area of Bimini, The Bahamas, the first recorded manatee sighting was in 1904 of a single individual that was apparently killed (Allen, 1942). The second was not until 1996, which was poorly documented. The small adult remained for approximately 6 wks before disappearing (Lefebvre et al., 2001). In 1998, a third sighting was reported off Bimini of a single individual. Although the animal was seen for several weeks and was relatively habituated to human presence (Al Sweeting, Jr., pers. comm., 28 November 2008), no data were collected on this individual nor any photographs suitable for identification purposes.

  2. Vibrational ground state cooling of a neutral atom in a tightly focused optical dipole trap

    NASA Astrophysics Data System (ADS)

    Aljunid, Syed; Maslennikov, Gleb; Paesold, Martin; Durak, Kadir; Leong, Victor; Kurtsiefer, Christian

    2012-06-01

    Recent experiments have shown that an efficient interaction between a single trapped atom and light can be established by concentrating light field at the location of the atom by focusing [1-3]. However, to fully exploit the benefits of strong focusing one has to localize the atom at the maximum of the field strength [4]. The position uncertainty due to residual kinetic energy of the atom in the dipole trap (depth ˜1mK) after molasses cooling is significant (few 100 nm). It limits the interaction between a focused light mode and an atom already for moderate focusing strength [2]. To address this problem we implement a Raman Sideband cooling technique, similar to the one commonly used in ion traps [5], to cool a single ^87Rb atom to the ground state of the trap. We have cooled the atom along the transverse trap axis (trap frequency ντ=55,), to a mean vibrational state nτ=0.55 and investigate the impact on atom-light interfaces.[4pt] [1] M. K. Tey, et al., Nature Physics 4 924 (2008)[0pt] [2] M. K. Tey et. al., New J. Phys. 11, 043011 (2009)[0pt] [3] S.A. Aljunid et al., PRL 103, 153601 (2009)[0pt] [4] C. Teo and V. Scarani Opt. Comm. 284 4485-4490 (2011)[0pt] [5] C. Monroe et al., PRL 75, 4011 (1995)

  3. On the mathematical theory of the motion of floating bodies: An update

    NASA Astrophysics Data System (ADS)

    Kleinman, R. E.

    1982-10-01

    The generation of surface waves in a fluid caused by a partially submerged body is modeled mathematically as a boundary value problem for the Laplacian with Neumann data on the bottom of the fluid container and on the body, a linearized free surface condition and a radiation condition at infinity. Fritz John (Comm. Pure Appl. Math., III, 1950) showed that the problem had a unique solution only under rather restrictive assumptions on the body geometry and reformulated the problem as an integral equation which was not uniquely solvable at certain irregular frequencies. In the present work, uniqueness is established for more general geometries, allowing corners and nonnormal intersections of the body with the free surfaces. Also presented are two methods of modifying the integral equation so that it is uniquely solvable for all frequencies. One method involves introducing an additional integral on the waterplane, while in the second method, an additional integral term is added to the equation which remains an equation only over the submerged portion of the body.

  4. Commande vectorielle d'un moteur asynchrone sans capteur

    NASA Astrophysics Data System (ADS)

    Ourth, T.

    1993-06-01

    A field-oriented control strategy for induction machines which does not use mechanical sensors is presented. The rotor flux is observed by a reduced-order Luenberger-type observer based on a model using a stator-fixed reference frame. An estimate of the rotation speed is derived from the flux vector, the measured stator currents and the field orientation angle. Simulations demonstrate that this control strategy performs well even in the presence of parameter variations up to ± 50% (resistances). Ce papier présente la commande par flux orienté d'une machine asynchrone sans capteur de vitesse ou de position. Le flux rotorique est évalué grâce à un observateur d'ordre réduit d'un type voisin de Luenberger travaillant dans un repère fixe statorique. L'estimation de la vitesse est obtenue à partir du module du flux rotorique, des courants statoriques mesurés et de l'angle d'orientation du flux rotorique. Cette étude basée sur des simulations démontre un comportement acceptable de la commande malgré la variation des paramètres comme les résistances de la machine.

  5. Rapport d’évaluation des besoins de formation de l’Association canadienne de gastro-entérologie 2009

    PubMed Central

    Rostom, Alaa; Daniels, Sandra

    2009-01-01

    C’est en avril 2009 que l’Association canadienne de gastroentérologie a mené son plus récent sondage annuel en ligne auprès de ses membres afin de connaître leurs besoins en matière de formation. En tout, 261 personnes ont répondu au sondage. Comme lors des années précédentes, les sujets entourant les maladies inflammatoires de l’intestin (MII) et plus particulièrement, les traitements pour la maladie de Crohn et la colite ulcéreuse (CU), de même que les cas de MII rebelles, ont été les plus en demande pour les activités de formation à venir. Parmi les autres thèmes populaires, mention-nons les techniques et les traitements endoscopiques, la maladie cœliaque, la prise en charge des infections gastro-intestinales (IGI) et l’endoscopie en direct. Les deux types d’activités de formation les plus attrayantes ont été les conférences et les présentations en Webdiffusion et le portail didactique de l’ACG offrant des liens vers des présentations en ligne, des tests d’auto-évaluation et le suivi des crédits de maintien du certificat (MainCert).

  6. On the Smoothness of the Noncommutative Pillow and Quantum Teardrops

    NASA Astrophysics Data System (ADS)

    Brzeziński, Tomasz

    2014-02-01

    Recent results by Krähmer [Israel J. Math. 189 (2012), 237-266] on smoothness of Hopf-Galois extensions and by Liu [arXiv:1304.7117] on smoothness of generalized Weyl algebras are used to prove that the coordinate algebras of the noncommutative pillow orbifold [Internat. J. Math. 2 (1991), 139-166], quantum teardrops {O}({W}{P}_q(1,l)) [Comm. Math. Phys. 316 (2012), 151-170], quantum lens spaces {O}(L_q(l;1,l)) [Pacific J. Math. 211 (2003), 249-263], the quantum Seifert manifold {O}(Σ_q^3) [J. Geom. Phys. 62 (2012), 1097-1107], quantum real weighted projective planes {O}({R}{P}_q^2(l;±)) [PoS Proc. Sci. (2012), PoS(CORFU2011), 055, 10 pages] and quantum Seifert lens spaces {O}(Σ_q^3(l;-)) [Axioms 1 (2012), 201-225] are homologically smooth in the sense that as their own bimodules they admit finitely generated projective resolutions of finite length.

  7. Gas outflow and dust transport of comet 67P/Churyumov-Gerasimenko

    NASA Astrophysics Data System (ADS)

    Lai, Ian-Lin; Su, Cheng-Chin; Ip, Wing-Huen; Lee, Jui-Chi; Lin, Zhong-Yi; Wu, Jong-Shinn

    2016-04-01

    Because of the diurnal thermal cycle and the irregular shape of the nucleus, gas outflow of comet 67P/Churyumov-Gerasimenko could be highly anisotropic as possibly indicated by the colliminated dust jet structures on the sunlit side. Based on the preliminary study of the outgassing effect from the early phase of the Rosetta mission, a simple model of surface sublimation can be constructed by taking into account the dependence on the solar insolation. By implementing the time variability of the global gas production rate, a sequence of gas coma models can be generated at different epochs before and after perihelion by using an advanced DSMC code [1, 2] to calculate the gas flow near the cometary nucleus. At selected time intervals, we will also investigate the size change of the cometary ionosphere as the nucleus rotates as well as the ejection of dust particles dragged by the gas flow into bounded and unbounded trajectories. Reference: 1. Wu, J.-S., Tseng, K.-C. and Wu, F.-Y., "Parallel three-dimensional DSMC method using mesh refinement and variable time-step scheme", Comput. Phys. Comm., 162, pp. 166-187, 2004. 2. Su, C.-C., Tseng, K.-C., Cave, H.M., Wu, J.-S., Lian, Y.-Y., Kuo, T.-C. and Jermy, M.C., "Implementation of a Transient Adaptive Sub-Cell Module for the Parallel DSMC Code Using Unstructured Grids," Computers & Fluids, Vol. 39, pp. 1136-1145, 2010.

  8. Introduction of Mobile Health Tools to Support Ebola Surveillance and Contact Tracing in Guinea.

    PubMed

    Sacks, Jilian A; Zehe, Elizabeth; Redick, Cindil; Bah, Alhoussaine; Cowger, Kai; Camara, Mamady; Diallo, Aboubacar; Gigo, Abdel Nasser Iro; Dhillon, Ranu S; Liu, Anne

    2015-12-01

    Challenges in data availability and quality have contributed to the longest and deadliest Ebola epidemic in history that began in December 2013. Accurate surveillance data, in particular, has been difficult to access, as it is often collected in remote communities. We describe the design, implementation, and challenges of implementing a smartphone-based contact tracing system that is linked to analytics and data visualization software as part of the Ebola response in Guinea. The system, built on the mobile application CommCare and business intelligence software Tableau, allows for real-time identification of contacts who have not been visited and strong accountability of contact tracers through timestamps and collection of GPS points with their surveillance data. Deployment of this system began in November 2014 in Conakry, Guinea, and was expanded to a total of 5 prefectures by April 2015. To date, the mobile system has not replaced the paper-based system in the 5 prefectures where the program is active. However, as of April 30, 2015, 210 contact tracers in the 5 prefectures were actively using the mobile system to collectively monitor 9,162 contacts. With proper training, some investment in technical hardware, and adequate managerial oversight, there is opportunity to improve access to surveillance data from difficult-to-reach communities in order to inform epidemic control strategies while strengthening health systems to reduce risk of future disease outbreaks. PMID:26681710

  9. XANES: Solid state mineral analysis

    NASA Astrophysics Data System (ADS)

    Bell, Peter M.

    Researchers in the field of mineral physics have become aware of new analytical techniques for studying the electronic structure of solids; one such technique is the X ray absorption fine structure (XFAS) method. In this technique the fine structure of the X ray K-edge, for example, can b e employed as a critical probe of t h e intricacies of a crystal structure (P. A. Lee, P. H. Citrin, P. Eisenberger, and B. M. Kincaid, Rev. Mod. Phys., 53, 799, 1981).A similar, related technique, X ray absorption near-edge spectroscopy (XANES), is a relatively unknown method of studying the electronic structure of solids. XANES is new, and due to its complex nature, data on all but very simple solids have not yet been applied rigorously. Among the first XANES results on minerals is the recent study reported by G. Knapp, B. Veal, H. Pan, and T. Klipper (Solid State Comm. 44, 1343, 1982) on perovskites, magnesiowustites, and other 3d oxides in the zircon and spinel groups. The interpretation of these results is still semiquantitative, being based on ground state and basic selection rule considerations. The results show, however, a strong correlation between near-edge spectra and crystal structure.

  10. Spectroscopie VUV sub-picoseconde : un détecteur haute cadence et un monochromateur pour impulsions femtosecondes

    NASA Astrophysics Data System (ADS)

    Martin, P.; Belsky, A.; Zinin, E.; Philippov, A.; Idir, M.; Moreno, T.; Darpentigny, G.; Salin, F.

    2003-06-01

    La très faible durée des impulsions harmoniques VUV est incompatible avec les systèmes dispersifs “classiques” existant comme les monochromateurs VUV utilisés actuellement, principalement auprès des sources de rayonnement synchrotron. Nous avons conçu un monochromateur VUV (domaine spectral: visible-30nm, 4-40eV) capable de fonctionner sans dispersion temporelle d'impulsions de quelques dizaines de fs. Son principe est basé sur l'utilisation de deux réseaux fonctionnant dans des ordres opposés en configuration optique de type Seya-Namioka, avec des optiques toriques pour la pré et post focalisation. Compte tenu des contraintes imposées le pouvoir de résolution attendu (environ 100) est suffisant pour des applications en spectroscopie VUV. Dans le cadre de cette thématique développée au CELIA et plus particulièrement en ce qui concerne l'aspect dynamique de la relaxation électronique, nous présentons ici également un détecteur de photons de grande sensibilité appelé “dissecteur” dont la résolution actuelle est d'environ 13ps mais qui sera prochainement portée à 1ps.

  11. Source characterization and modeling development for monoenergetic-proton radiography experiments on OMEGA

    SciTech Connect

    Manuel, M. J.-E.; Zylstra, A. B.; Rinderknecht, H. G.; Casey, D. T.; Rosenberg, M. J.; Sinenian, N.; Li, C. K.; Frenje, J. A.; Seguin, F. H.; Petrasso, R. D.

    2012-06-15

    A monoenergetic proton source has been characterized and a modeling tool developed for proton radiography experiments at the OMEGA [T. R. Boehly et al., Opt. Comm. 133, 495 (1997)] laser facility. Multiple diagnostics were fielded to measure global isotropy levels in proton fluence and images of the proton source itself provided information on local uniformity relevant to proton radiography experiments. Global fluence uniformity was assessed by multiple yield diagnostics and deviations were calculated to be {approx}16% and {approx}26% of the mean for DD and D{sup 3}He fusion protons, respectively. From individual fluence images, it was found that the angular frequencies of Greater-Than-Or-Equivalent-To 50 rad{sup -1} contributed less than a few percent to local nonuniformity levels. A model was constructed using the Geant4 [S. Agostinelli et al., Nuc. Inst. Meth. A 506, 250 (2003)] framework to simulate proton radiography experiments. The simulation implements realistic source parameters and various target geometries. The model was benchmarked with the radiographs of cold-matter targets to within experimental accuracy. To validate the use of this code, the cold-matter approximation for the scattering of fusion protons in plasma is discussed using a typical laser-foil experiment as an example case. It is shown that an analytic cold-matter approximation is accurate to within Less-Than-Or-Equivalent-To 10% of the analytic plasma model in the example scenario.

  12. Source characterization and modeling development for monoenergetic-proton radiography experiments on OMEGA

    NASA Astrophysics Data System (ADS)

    Manuel, M. J.-E.; Zylstra, A. B.; Rinderknecht, H. G.; Casey, D. T.; Rosenberg, M. J.; Sinenian, N.; Li, C. K.; Frenje, J. A.; Séguin, F. H.; Petrasso, R. D.

    2012-06-01

    A monoenergetic proton source has been characterized and a modeling tool developed for proton radiography experiments at the OMEGA [T. R. Boehly et al., Opt. Comm. 133, 495 (1997)], 10.1016/S0030-4018(96)00325-2 laser facility. Multiple diagnostics were fielded to measure global isotropy levels in proton fluence and images of the proton source itself provided information on local uniformity relevant to proton radiography experiments. Global fluence uniformity was assessed by multiple yield diagnostics and deviations were calculated to be ˜16% and ˜26% of the mean for DD and D3He fusion protons, respectively. From individual fluence images, it was found that the angular frequencies of ≳50 rad-1 contributed less than a few percent to local nonuniformity levels. A model was constructed using the Geant4 [S. Agostinelli et al., Nuc. Inst. Meth. A 506, 250 (2003)], 10.1016/S0168-9002(03)01368-8 framework to simulate proton radiography experiments. The simulation implements realistic source parameters and various target geometries. The model was benchmarked with the radiographs of cold-matter targets to within experimental accuracy. To validate the use of this code, the cold-matter approximation for the scattering of fusion protons in plasma is discussed using a typical laser-foil experiment as an example case. It is shown that an analytic cold-matter approximation is accurate to within ≲10% of the analytic plasma model in the example scenario.

  13. Integrated Plasma Simulation of Lower Hybrid Current Drive in Tokamaks

    NASA Astrophysics Data System (ADS)

    Bonoli, P. T.; Wright, J. C.; Harvey, R. W.; Batchelor, D. B.; Berry, L. A.; Kessel, C. E.; Jardin, S. C.

    2012-03-01

    It has been shown in Alcator C-Mod that the onset time for sawteeth can be delayed significantly (up to 0.5 s) relative to ohmically heated plasmas, through the injection of off-axis LH current drive power [1]. We are simulating these experiments using the Integrated Plasma Simulator (IPS) [2], where the driven LH current density profiles are computed using a ray tracing component (GENRAY) and Fokker Planck code (CQL3D) [3] that are run in a tightly coupled time advance. The background plasma is evolved using the TSC transport code with the Porcelli sawtooth model [4]. Predictions of the driven LH current profiles will be compared with simpler ``reduced'' models for LHCD such as the LSC code which is implemented in TSC and which is also invoked within the IPS. [4pt] [1] C. E. Kessel et al, Bull. of the Am. Phys. Soc. 53, Poster PP6.00074 (2008). [0pt] [2] D. Batchelor et al, Journal of Physics: Conf. Series 125, 012039 (2008). [0pt] [3] R. W. Harvey and M. G. McCoy, Proc. of the IAEA Tech. Comm. Meeting on Simulation and Modeling of Therm. Plasmas, Montreal, Canada (1992). [0pt] [4] S. C. Jardin et al, J. Comp. Phys. 66, 481 (1986).

  14. Bald eagle predation on common loon egg

    USGS Publications Warehouse

    DeStefano, Stephen; McCarthy, Kyle P.; Laskowski, Tom

    2010-01-01

    The Common Loon (Gavia immer) must defend against many potential egg predators during incubation, including corvids, Herring Gulls (Larus argentatus), raccoons (Procyon lotor), striped skunk (Mephitis mephitis), fisher (Martes pennanti), and mink (Neovison vison) (McIntyre 1988, Evers 2004, McCann et al. 2005). Bald Eagles (Haliaeetus leucocephalus) have been documented as predators of both adult Common Loons and their chicks (Vliestra and Paruk 1997, Paruk et al. 1999, Erlandson et al. 2007, Piper et al. 2008). In Wisconsin, where nesting Bald Eagles are abundant (>1200 nesting pairs, >1 young/pair/year), field biologists observed four instances of eagle predation of eggs in loon nests during the period 2002–2004 (M. Meyer pers. comm.). In addition, four cases of eagle predation of incubating adult loons were inferred from evidence found at the loon nest (dozens of plucked adult loon feathers, no carcass remains) and/or loon leg, neck, and skull bones beneath two active eagle nests, including leg bones containing the bands of the nearby (<25 m) incubating adult loon. However, although loon egg predation has been associated with Bald Eagles, predation events have yet to be described in peer-reviewed literature. Here we describe a photographic observation of predation on a Common Loon egg by an immature Bald Eagle as captured by a nest surveillance video camera on Lake Umbagog, a large lake (32 km2) at Umbagog National Wildlife Refuge (UNWR) in Maine.

  15. Verification of high voltage rf capacitive sheath models with particle-in-cell simulations

    NASA Astrophysics Data System (ADS)

    Wang, Ying; Lieberman, Michael; Verboncoeur, John

    2009-10-01

    Collisionless and collisional high voltage rf capacitive sheath models were developed in the late 1980's [1]. Given the external parameters of a single-frequency capacitively coupled discharge, plasma parameters including sheath width, electron and ion temperature, plasma density, power, and ion bombarding energy can be estimated. One-dimensional electrostatic PIC codes XPDP1 [2] and OOPD1 [3] are used to investigate plasma behaviors within rf sheaths and bulk plasma. Electron-neutral collisions only are considered for collisionless sheaths, while ion-neutral collisions are taken into account for collisional sheaths. The collisionless sheath model is verified very well by PIC simulations for the rf current-driven and voltage-driven cases. Results will be reported for collisional sheaths also. [1] M. A. Lieberman, IEEE Trans. Plasma Sci. 16 (1988) 638; 17 (1989) 338 [2] J. P. Verboncoeur, M. V. Alves, V. Vahedi, and C. K. Birdsall, J. Comp. Phys. 104 (1993) 321 [3] J. P. Verboncoeur, A. B. Langdon and N. T. Gladd, Comp. Phys. Comm. 87 (1995) 199

  16. Multistep π dimerization of tetrakis(n-decyl)heptathienoacene radical cations: a combined experimental and theoretical study.

    PubMed

    Ferrón, Cristina Capel; Capdevila-Cortada, Marçal; Balster, Russell; Hartl, František; Niu, Weijun; He, Mingqian; Novoa, Juan J; López Navarrete, Juan T; Hernández, Víctor; Ruiz Delgado, M Carmen

    2014-08-11

    Radical cations of a heptathienoacene α,β-substituted with four n-decyl side groups (D4T7(.) (+) ) form exceptionally stable π-dimer dications already at ambient temperature (Chem. Comm. 2011, 47, 12622). This extraordinary π-dimerization process is investigated here with a focus on the ultimate [D4T7(.) (+) ]2 π-dimer dication and yet-unreported transitory species formed during and after the oxidation. To this end, we use a joint experimental and theoretical approach that combines cyclic voltammetry, in situ spectrochemistry and spectroelectrochemistry, EPR spectroscopy, and DFT calculations. The impact of temperature, thienoacene concentration, and the nature and concentration of counteranions on the π-dimerization process is also investigated in detail. Two different transitory species were detected in the course of the one-electron oxidation: 1) a different transient conformation of the ultimate [D4T7(.) (+) ]2 π-dimer dications, the stability of which is strongly affected by the applied experimental conditions, and 2) intermediate [D4T7]2 (.) (+) π-dimer radical cations formed prior to the fully oxidized [D4T7]2 (.) (+) π-dimer dications. Thus, this comprehensive work demonstrates the formation of peculiar supramolecular species of heptathienoacene radical cations, the stability, nature, and structure of which have been successfully analyzed. We therefore believe that this study leads to a deeper fundamental understanding of the mechanism of dimer formation between conjugated aromatic systems. PMID:25043826

  17. Incoporating Existing Large Applications in the PUPIL System: Amber

    NASA Astrophysics Data System (ADS)

    Trickey, Sam; Torras Costa, Juan; Seabra, Gustavo De Miranda; Roitberg, Adrian; Deumens, E.

    2007-03-01

    PUPIL (Program for User Package Interfacing and Linking)^1 inter-operates existing codes for multi-threaded, multi-scale quantum and classical mechanical simulations via JAVA, XML, JAVA, a C++ library, and minimally intrusive wrappers for each code. An architectural challenge for PUPIL is support of modules from a multi-scale QM-MD suite with much internal coupling. We have succeeded with the AMBER suite MD module (Sander), with Gaussian03 for QM. Our demonstration study is the decomposition of Angelis' salt with explict water. A variable quantum zone (solute and first solvation cell) was used, with the remaining waters via TIP3P. Sander calculated the Potential of Mean Force for the reaction through umbrella sampling, with the QM forces from Gaussian. We summarize PUPIL architecture and implementation aspects, report efficiency and overhead measures, and discuss the computed results. ^1J. Torras, E. Deumens and S.B. Trickey, J. Computer Aided Mat. Des. 13, 201 (2006); J. Torras et al. Comp. Phys. Comm. 2006 [accepted

  18. [Distribution and Risk Assessment of Sulfonamides Antibiotics in Soil and Vegetables from Feedlot Livestock].

    PubMed

    Jin, Cai-xia; Si, Xiao-wei; Wang, Zi-ying; Zhang, Qin-wen

    2016-04-15

    Soil and vegetable samples were collected from 13 different livestock farms of different sizes in Xinxiang of China, and the residues of three sulfonamides including sulfadiazine, sulfamonomethoxine, and sulfamethoxazole were analyzed by HPLC with a fluorimetric detector, The results indicated that the total concentration ranges of the three sulfonamides in soil and vegetable were 7.60-176.26 µg · kg⁻¹ and ND-32, 70 µg · kg⁻¹, respectively. The mean concentrations were 70.73 µg · kg⁻¹ and 7.08 µg · kg⁻¹ for soil and vegetables. The residue levels in soil were all lower than the ecotoxic effect trigger value (100 µg · kg⁻¹) set by the Veterinary Medicine International Coordination Commission, indicating the low risk for organisms in soil. The concentrations of three sulfonamides varied significantly in different kinds of vegetables and were all lower than the acceptable daily intake values [50 µg · (kg ·d)⁻¹] set by Joint FAO/WHO Expert CommIttee on Food Additives. But we cannot neglect the potential ecotoxicity and resistance for human via food chain. PMID:27548983

  19. Magnetic properties of the two-dimensional Hubbard model and normal-state T1 of high-temperature superconductors

    NASA Astrophysics Data System (ADS)

    Jackson, Francis; Vilk, Y. M.; Tremblay, A.-M. S.

    1997-03-01

    The spin-lattice relaxation time T1 and the uniform magnetic susceptibility of the two-dimensional Hubbard model is calculated in the paramagnetic state using the Two-Particle Self-Consistent approach. This approach (Y.M. Vilk, Liang Chen and A.-M.S. Tremblay, Phys. Rev. B Rapid Comm. 49), 13 267-13 270 (1994) has no adjustable parameter, satisfies the Mermin-Wagner theorem and is in agreement with Monte Carlo simulations. The best overall agreement with measurements in La_2-xSr_xCuO4 is obtained for the Hubbard model with repulsion U>6.5t and second-neighbor hopping t'=-0.28t. However, the agreement with experiment at low temperature is spoiled by the fact that the renormalized classical regime occurs over too wide a region of band fillings. The growth of fluctuations can be stopped by including phenomenologically the effect of disorder. Orthorhombicity is insufficient to appreciably decrease the size of the renormalized classical regime. It is argued that the simple one-band Hubbard model will give a better description of Cu T1 and susceptibility measurements in Nd_2-xCe_xCuO4 than in La_2-xSr_xCuO_4. (Two-Particle Self-Consistent approach) including single-particle properties

  20. Des proprietes de l'etat normal du modele de Hubbard bidimensionnel

    NASA Astrophysics Data System (ADS)

    Lemay, Francois

    Depuis leur decouverte, les etudes experimentales ont demontre que les supra-conducteurs a haute temperature ont une phase normale tres etrange. Les proprietes de ces materiaux ne sont pas bien decrites par la theorie du liquide de Fermi. Le modele de Hubbard bidimensionnel, bien qu'il ne soit pas encore resolu, est toujours considere comme un candidat pour expliquer la physique de ces composes. Dans cet ouvrage, nous mettons en evidence plusieurs proprietes electroniques du modele qui sont incompatibles avec l'existence de quasi-particules. Nous montrons notamment que la susceptibilite des electrons libres sur reseau contient des singularites logarithmiques qui influencent de facon determinante les proprietes de la self-energie a basse frequence. Ces singularites sont responsables de la destruction des quasi-particules. En l'absence de fluctuations antiferromagnetiques, elles sont aussi responsables de l'existence d'un petit pseudogap dans le poids spectral au niveau de Fermi. Les proprietes du modele sont egalement etudiees pour une surface de Fermi similaire a celle des supraconducteurs a haute temperature. Un parallele est etabli entre certaines caracteristiques du modele et celles de ces materiaux.

  1. California Alliance For Radiotracer Education, CARE

    SciTech Connect

    Sutcliffe, Julie

    2015-02-19

    The report contains a summary of the accomplishments made during the CARE proposal. The overall goal of this proposal was to train graduate students and postdoctoral fellows in the field of radiochemistry. The goal was to expose trainees to the fundamentals of radioisotope production, radiochemistry synthesis, synthetic organic chemistry as well as applications and hands on experience in small animal imaging. In summary approximately 30 trainees were involved including trainees both at the graduate and postdoctoral levels. This funding has to date resulted in publications in high impact journals such as Med Chem Comm, Journal of Nuclear Medicine and Molecular Imaging and Biology. Trainees have gone on to further their careers in both academia, industry and the private sector. The funding will result in seven Master’s and six Ph.D dissertations. Without the DOE funding it simply would not have been possible to continue to train the next generation of radiochemists needed to assure a future US-based Nuclear and Radiochemistry Expertise.

  2. Non-Intersecting Squared Bessel Paths at a Hard-Edge Tacnode

    NASA Astrophysics Data System (ADS)

    Delvaux, Steven

    2013-12-01

    The squared Bessel process is a 1-dimensional diffusion process related to the squared norm of a higher dimensional Brownian motion. We study a model of n non-intersecting squared Bessel paths, with all paths starting at the same point a > 0 at time t = 0 and ending at the same point b > 0 at time t = 1. Our interest lies in the critical regime ab = 1/4, for which the paths are tangent to the hard edge at the origin at a critical time . The critical behavior of the paths for n → ∞ is studied in a scaling limit with time t = t * + O( n -1/3) and temperature T = 1 + O( n -2/3). This leads to a critical correlation kernel that is defined via a new Riemann-Hilbert problem of size 4 × 4. The Riemann-Hilbert problem gives rise to a new Lax pair representation for the Hastings-McLeod solution to the inhomogeneous Painlevé II equation q''( x) = xq( x) + 2 q 3( x) - ν, where ν = α + 1/2 with α > -1 the parameter of the squared Bessel process. These results extend our recent work with Kuijlaars and Zhang (Comm Pure Appl Math 64:1305-1383, 2011) for the homogeneous case ν = 0.

  3. Particle trajectory entanglement in microfluidic channels

    NASA Astrophysics Data System (ADS)

    Marin, Alvaro; Rossi, Massimiliano; Kähler, Christian

    2015-11-01

    Suspensions in motion can show very complex and counterintuitive behavior, particularly at high concentrations. In this talk we show an overlooked phenomenon occurring when a dilute particle solution is forced to travel in a narrow channel (only a few times the particle size). At critical interparticle distances, particles tend to interlace their trajectories forming a sort of hydroclusters only bonded by hydrodynamic interactions. While classical studies on non-Brownian self-diffusivity report average particle displacements of fractions of the particle diameter, the trajectories observed in our system show displacements of several particle diameters. Indeed, such a behavior resemble the deterministic trajectories found by Uspal et al. (Nat. Comm. 4, 2013) with engineered particle doublets. Trajectory statistics are obtained for different shear rates and particle sizes. The results are compared with particle dynamics simulations and analyzed under the light of recent studies on the irreversibility of non-Brownian suspensions (Metzger et al., Phys. Rev. E, 2013) to elucidate the nature of the hydrodynamic interactions entering into play. The reported phenomenon could be applied to promote advective mixing in micro-channels or particle/droplet self-assembly.

  4. Migration de prothèse herniaire en intravésical : mécanisme et enjeux

    PubMed Central

    El anzaoui, Jihad; Ghoundale, Omar; Touiti, Driss; Savoie, Pierre Henri; Laroche, Julien; Riviere, Philipe; Lemesle, Loic; Fournier, Robert

    2015-01-01

    Résumé La migration d’une prothèse synthétique pour hernie abdominale ou inguinale est un incident rare. Elle peut survenir aussi bien en intrapéritonéal qu’en sous-péritonéal. La migration intrapéritonéale entraîne un risque d’obstruction intestinale et d’infection pouvant menacer le pronostic vital. La migration endovésicale est beaucoup plus rare. La plaque en endovésical se comporte comme un corps étranger avec risque de calcification et de cystite. Le diagnostic différentiel se pose surtout avec un calcul vésical ou une tumeur de la vessie. Devant la prédominance de signes irritatifs non spécifiques, le diagnostic repose sur les observations radiologiques mais surtout cystoscopiques. Le traitement est essentiellement endoscopique, par la résection de l’extrémité prolabée en endovésical. PMID:26279716

  5. Neurorétinite unilatérale: une manifestation rare du syndrome post streptococcique

    PubMed Central

    Iferkhass, Said; Elkhoyaali, Adil; Elasri, Fouad; Reda, Karim; Laktaoui, Abdelkader; Oubaaz, Abdelbar

    2014-01-01

    La streptocoque β hémolytique est responsable de plusieurs complications d'origine immunitaire, de localisation cardiaque, articulaire, dermatologique, rénale, cérébrale et oculaire. Nous rapportons le premier cas au Maroc d'une uvéite postérieure unilatérale post- streptococcique présentant une vascularite rétinienne avec œdème papillaire et des hémorragies rétiniennes en tache profondes et superficielles. Notre patient âgé de 56 ans, ayant comme antécédents pathologiques une notion d'angine et d’ érythème noueux à répétition d'origine streptococcique. Le bilan étiologique d'uvéite est revenu normal. En revanche, le titrage des anticorps antistreptococciques était significativement élevé: 430 IU /ml. Le patient a été mis sous amoxicilline protégée à une dose de 2 g par jour pendant 10 jours, associée à une corticothérapie à dose régressive sur un mois. L’évolution était favorable avec récupération totale de l'acuité visuelle (AV) et disparition des lésions neurorétiniennes PMID:25745528

  6. [Not Available].

    PubMed

    Ettalbi, S; Ibnouzahir, M; Droussi, H; Wahbi, S; Bahaichar, N; Boukind, E H

    2009-06-30

    La brûlure est un accident qui reste toujours très fréquent au Maroc, ce qui fait d'elle un problème de la santé publique. Les brûlures, quand elles sont graves ou profondes, entraînent de façon quasi inéluctable des séquelles fonctionnelles et esthétiques. A travers deux observations de deux enfants présentant des séquelles de brûlures graves, ayant retenti péjorativement sur leurs scolarités, on a essayé de mettre en évidence quelques facteurs incriminés dans cette tragédie (feu, petites bouteilles de gaz et le manque d'infrastructure, du personnel médical et paramédical, du matériel ainsi que de la prévention) comme étant une grande cause dans la survenue de ces séquelles. Le but de notre travail est d'énumérer ces différents facteurs intriqués, ainsi que de proposer quelques solutions, tout en insistant sur la prévention. PMID:21991156

  7. Kyste dermoïde géant de la paroi abdominale: une observation rare

    PubMed Central

    Yaka, Mbarek; Ehirchiou, Abdelkader; Alkandry, Sifeddine; Zentar, Aziz

    2015-01-01

    Les kystes dermoïdes sont des lésions bénignes fréquentes. Ils peuvent être volumineux et entrainer une destruction des tissus avoisinants surtout au niveau du crâne. Ces kystes dermoïdes sont le plus souvent de localisation ovarienne ou testiculaire mais d'autres localisations, principalement axiales, sont décrites. Le kyste dermoïde de la paroi abdominale est rare. Quant aux volumineux kystes, ils sont encore plus rares. La possibilité de leur dégénérescence impose une exérèse chirurgicale. Nous rapportons un cas rare de kyste dermoïde géant de la paroi abdominale antérolatérale, qui peut poser un problème de diagnostic différentiel avec le un kyste hydatique, surtout dans un pays endémique comme le Maroc. PMID:26327968

  8. Metallic Transport at the Insulator-Superconductor Transition

    NASA Astrophysics Data System (ADS)

    Kapitulnik, Aharon

    2000-03-01

    Analyses of experimental data on the superconductor to insulator transition in MoGe thin films suggest coupling of the system to a dissipative bath [1]. A phenomenology is developed to account for such coupling in which upon lowering the temperature the system can either be attracted by the "true" quantum critical point or driven away from it by dissipation [2]. Results on the disruption of scaling in quantum-Hall to insulator transition [3] and in arrays of Josephson-junctions are interpreted in a similar way, hence showing again the similarity among these problems[4]. 1. N. Mason and A. Kapitulnik, Phys. Rev. Lett. 82, 5341 (1999). 2. E. Shimshoni, A. Auerbach and A. Kapitulnik, Phys. Rev. Lett. 80, 3352 (1998). 3. D. Shahar, M. Hilke, C.C. Li, D.C. Tsui, S.L. Sondhi, J.E. Cunningham, and M. Razeghi, Sol. St. Comm. 107, 19 (1998). 4. S. Kivelson, D.H. Lee, and S.-C. Zhang, Phys. Rev. B 46, 2223 (1992).

  9. Appendicite chronique chez les enfants

    PubMed Central

    Kim, David; Butterworth, Sonia A.; Goldman, Ran D.

    2016-01-01

    Résumé Question Alors que le diagnostic d’appendicite aigu est relativement simple à poser, celui d’appendicite chronique peut être controversé et souvent mal posé. De quelle manière et à quel moment les cliniciens devraient-ils investiguer l’appendicite chronique comme la cause de douleurs abdominales chroniques et récidivantes dans la population pédiatrique? Réponse L’appendicite chronique est une inflammation ou fibrose de longue date de l’appendice dont le tableau clinique est une douleur abdominale prolongée ou intermittente. Son diagnostic est souvent difficile à poser et elle peut entraîner des complications telles que des infections intra-abdominales, ou l’occlusion ou la perforation de l’intestin. Le tableau clinique, de même que les études d’imagerie, peuvent aider le clinicien à écarter d’autres affections, et chez les patients qui reçoivent un diagnostic, dont de nombreux enfants, l’appendicectomie soulage partiellement ou complètement la douleur.

  10. New age data on the geological evolution of Southern India

    NASA Technical Reports Server (NTRS)

    Taylor, Paul N.; Chadwick, B.; Friend, C. R. L.; Ramakrishnan, M.; Moorbath, Stephen; Viswanatha, M. N.

    1988-01-01

    The Peninsular Gneisses of Southern India developed over a period of several hundred Ma in the middle-to-late Archaean. Gneisses in the Gorur-Hassan area of southern Karnataka are the oldest recognized constituents: Beckinsale et al. reported a preliminary Rb-Sr whole-rock isochron age of 33558 + or - 66 Ma, but further Rb-Sr and Pb/Pb whole-rock isochron determinations indicate a slightly younger, though more precise age of ca 3305 Ma (R. D. Beckinsale, Pers. Comm.). It is well established that the Peninsular Gneisses constitute basement on which the Dharwar schist belts were deposited. Well-documented exposures of unconformities, with basal quartz pebble conglomerates of the Dharwar Supergroup overlying Peninsular Gneisses, have been reported from the Chikmagalur and Chitradurga areas, and basement gneisses in these two areas have been dated by Rb-Sr and Pb/Pb whole-rock isochron methods at ca 3150 Ma and ca 3000 Ma respectively. Dharwar supracrustal rocks of the Chitradurga schist belt are intruded by the Chitradurga Granite, dated by a Pb/Pb whole-rock isochron at 2605 + or - 18 Ma. These results indicate that the Dharwar Supergroup in the Chitradurga belt was deposited between 3000 Ma and 2600 Ma.

  11. R-Gator: an unmanned utility vehicle

    NASA Astrophysics Data System (ADS)

    Moorehead, Stewart J.; Wellington, Carl K.; Paulino, Heidi; Reid, John F.

    2010-04-01

    The R-Gator is an unmanned ground vehicle built on the John Deere 6x4 M-Gator utility vehicle chassis. The vehicle is capable of operating in urban and off-road terrain and has a large payload to carry supplies, wounded, or a marsupial robot. The R-Gator has 6 modes of operation: manual driving, teleoperation, waypoint, direction drive, playback and silent sentry. In direction drive the user specifies a direction for the robot. It will continue in that direction, avoiding obstacles, until given a new direction. Playback allows previously recorded paths, from any other mode including manual, to be played back and repeated. Silent sentry allows the engine to be turned off remotely while cameras, computers and comms remain powered by batteries. In this mode the vehicle stays quiet and stationary, collecting valuable surveillance information. The user interface consists of a wearable computer, monocle and standard video game controller. All functions of the R-Gator can be controlled by the handheld game controller, using at most 2 button presses. This easy to use user interface allows even untrained users to control the vehicle. This paper details the systems developed for the R-Gator, focusing on the novel user interface and the obstacle detection system, which supports safeguarded teleoperation as well as full autonomous operation in off-road terrain. The design for a new 4-wheel, independent suspension chassis version of the R-Gator is also presented.

  12. Jumeaux conjoints au niveau d’une omphalocèle commune avec extrophie cloacale et ambigüité sexuelle

    PubMed Central

    Boujoual, Majdouline; Madani, Hamid; Benhaddou, Housain; Belahcen, Mohamed

    2014-01-01

    Les jumeaux conjoints sont considérés comme étant une complication rare et grave des grossesses monozygotes. Le diagnostic anténatal permet de définir avec précision les structures communes, de rechercher une anomalie congénitale associée, d'organiser l´accouchement et la prise en charge néonatale. Nous présentons un cas rare de jumeaux conjoints dont la fusion se situait au niveau d'une omphalocèle commune associée à une extrophie cloacale, ambiguïté sexuelle et pieds bots. Le diagnostic a été méconnu pendant la grossesse, ce qui a engendré une dystocie lors de l'accouchement. L'issue a été fatale malgré une tentative de séparation et des mesures de réanimation. Ce cas illustre la difficulté liée d'une part à la méconnaissance du diagnostic, d'autre part au caractère urgent de la césarienne et de la séparation chirurgicale. PMID:25170387

  13. Outcome of a grocery voucher incentive scheme for low-income tuberculosis patients on directly observed therapy in Singapore

    PubMed Central

    Chua, Angeline Poh-Gek; Lim, Leo Kang-Yang; Ng, Huiyi; Chee, Cynthia Bin-Eng; Wang, Yee Tang

    2015-01-01

    INTRODUCTION The ‘DOT & Shop’ scheme is sponsored by SATA CommHealth, a local non-governmental organisation. It was launched in July 2009, in collaboration with Singapore’s Tuberculosis Control Unit (TBCU). Under this scheme, grocery vouchers are disbursed to low-income patients with tuberculosis (TB) at each clinic visit if they have been adherent to directly observed therapy (DOT). This study aimed to determine the effect of this incentive scheme on treatment completion rates and to report the characteristics of patients who were non-adherent to the scheme. METHODS This descriptive study used data from the TBCU medical social worker database and the National TB Registry. RESULTS From July 2009 to December 2012, a total of 883 TB patients were enrolled in the scheme. The overall treatment completion rates of the patients before (July 2006–June 2009) and after (July 2009–December 2012) the implementation of the scheme improved from 85.3% to 87.2% (p = 0.02). Patients under this scheme had a higher treatment completion rate (90.0%) than those not under this scheme (86.4%) (p < 0.01). It was found that the non-adherent patients were more likely to be of Malay ethnicity, younger and unemployed. CONCLUSION We demonstrate the salutary effect of a non-governmental organisation-funded grocery voucher incentive scheme for low-income TB patients on DOT in Singapore. PMID:25788246

  14. Description de Nosopsyllus (N.) Atsbi n. sp. (Siphonaptera : Ceratophyllidae) d’Éthiopie et révision de l’espèce affine N. (N.) Incisus (Jordan & Rothschild, 1913) ; discussion biogéographique

    PubMed Central

    Beaucournu, J.-C.; Meheretu, Y.; Welegerima, K.; Mergey, T.; Laudisoit, A.

    2012-01-01

    Nous décrivons un Nosopsyllus s. sto. nouveau du nord de l’Éthiopie, N. atsbi, montrant des ressemblances phylétiques avec N. incisus (Jordan & Rothschild, 1913), espèce cantonnée à la partie orientale de la région afrotropicale. Ceci nous conduit à revoir les populations classées comme incisus sur l’unique critère de la sétation du télomère (trois fortes soies marginales, au lieu des deux classiquement observées dans ces genre et sous-genre). Il apparaît que N. incisus s. sto. est connu au nord-est de la République Démocratique du Congo, au Kenya, au Burundi et en Tanzanie. Au nord et au sud de cette région (centre de l’Éthiopie, d’une part, Zambie et Malawi, d’autre part), deux taxa sont morphologiquement à part et nous les érigeons au rang de sous-espèces : Nosopsyllus (N.) incisus traubi n. ssp. et N. (N.) incisus lewisi n. ssp. À l’heure actuelle, le “complexe incisus” est riche de quatre taxa, à savoir, du nord au sud, N. atsbi n. sp., N. incisus traubi n. ssp., N. incisus incisus (Jordan & Rothschild, 1913) et N. incisus lewisi n. ssp. PMID:22314238

  15. Fiabilité des structures mécaniques adaptatives: effet de la panne des actionneurs ou des capteurs sur la stabilité

    NASA Astrophysics Data System (ADS)

    Fall, H.; Charon, W.; Kouta, R.

    2002-12-01

    Ces dernières décennies, des activités significatives dans le monde étaient dirigées autour du contrôle actif. Le but de ces recherches était essentiellement d'améliorer les performances, la fiabilité et la sécurité des systèmes. Notamment dans le cas des structures soumises à des vibrations aléatoires. D'importants travaux ont été consacré à l'utilisation des “matériaux intelligents” comme capteurs et actionneurs. Cette article propose l'analyse de la fiabilité des systèmes mécaniques en étudiant les pannes des actionneurs ou des capteurs. L'effet de ces pannes sur la stabilité et la performance du système y est démontré. Les méthodologies de conception y sont rappelées. Des exemples numériques sont fournis à travers le contrôle d'un panneau sous chargement dynamique pour illustrer la méthode proposée.

  16. Efficacité de la riboflavine dans la prévention de la migraine pédiatrique

    PubMed Central

    Sherwood, Michelle; Goldman, Ran D.

    2014-01-01

    Résumé Question Le taux des diagnostics de migraine chez les enfants est à la hausse. La riboflavine comme option de rechange aux agents pharmacologiques traditionnels est-elle efficace et sécuritaire pour la prévention de la migraine chez les enfants? Réponse Parce que la migraine est un problème très commun durant l’enfance et l’adolescence et contribue souvent à un fardeau considérable de la maladie, on s’intéresse de plus en plus à d’autres options que la prévention pharmacologique traditionnelle. On s’attendrait à ce que d’autres médicaments en vente libre soient moins toxiques, mieux tolérés et aient moins d’effets secondaires. Quelques études auprès d’adultes démontrent que la riboflavine (vitamine B2) pourrait diminuer la fréquence des migraines. Il est devenu une pratique habituelle de recommander que les enfants essaient la riboflavine pour prévenir la migraine; par ailleurs, la recherche sur l’utilisation de la riboflavine chez les enfants n’est pas concluante.

  17. Un essai contrôlé randomisé: effet du port de chaussures à talons hauts sur le squelette appendiculaire inferieur

    PubMed Central

    Koussihouèdé, Fifamè Eudia Nadège; Falola, Jean-Marie; Fousseni, El-Mansour Barres

    2015-01-01

    Introduction Véritable attribut de la féminité, le port de chaussures à talons est devenu une exigence professionnelle dans certaines structures des pays en développement comme le Bénin. L'objectif de ce travail est de déterminer les effets spécifiques du port de chaussures à talons hauts sur le squelette appendiculaire inférieur. Méthodes Des examens radiographiques de face et de profil de la cheville et du genou ont été effectués sur 122 femmes volontaires, âgées en moyenne de 25,09 ± 1,34 ans et ayant les genu varum qui ont participé à cette étude. Résultats Les résultats ont indiqué une augmentation significative de l’écart inter malléolaire, de l’écart inter condylien, de l'angle antérieur du pied et de l'angle fémoro-patellaire. Une diminution significative de l'angle postérieur du pied a été constatée. Conclusion Le port de chaussures à talons hauts est l'une des causes de la gonarthrose, des troubles des articulations de la cheville et du pied. PMID:26113922

  18. Profil anthropometrique des enfants scolarises tananariviens

    PubMed Central

    Razafimanantsoa, Fetralinjiva; Razafindramaro, Notahiana; Raherimandimby, Hasina; Robinson, Annick; RakotoAlson, Olivat; Rasamindrakotroka, Andry

    2013-01-01

    Les enfants tananariviens sont en état de malnutrition chronique. Notre objectif est d’évaluer l'indice de masse corporelle (IMC) pour estimer les enfants apparemment "sains". Une enquête et une mesure de la taille et du poids des enfants scolarisés tananariviens de 6 à 11 ans ont été réalisées. Après leur accord, la taille et l'indice de masse corporelle des 442 enfants tirés au hasard ont été ainsi obtenus. L'analyse de la moyenne de la taille a révélé une différence significative à 8 ans, une différence non évidente sur l'indice de masse corporelle. La comparaison avec les valeurs de référence (OMS 2006) a montré un retard statural de 34% avec une tendance globale à la hausse et un déficit pondéral égal à 5,5% selon le z score. Ainsi, au sein d'une population malnutrie, l'indice de masse corporelle pourrait être utilisé comme un des paramètres à considérer dans l’évaluation de l’état de santé pour classer ces enfants en bonne santé apparente. PMID:24711862

  19. Introduction of Mobile Health Tools to Support Ebola Surveillance and Contact Tracing in Guinea

    PubMed Central

    Sacks, Jilian A; Zehe, Elizabeth; Redick, Cindil; Bah, Alhoussaine; Cowger, Kai; Camara, Mamady; Diallo, Aboubacar; Gigo, Abdel Nasser Iro; Dhillon, Ranu S; Liu, Anne

    2015-01-01

    Challenges in data availability and quality have contributed to the longest and deadliest Ebola epidemic in history that began in December 2013. Accurate surveillance data, in particular, has been difficult to access, as it is often collected in remote communities. We describe the design, implementation, and challenges of implementing a smartphone-based contact tracing system that is linked to analytics and data visualization software as part of the Ebola response in Guinea. The system, built on the mobile application CommCare and business intelligence software Tableau, allows for real-time identification of contacts who have not been visited and strong accountability of contact tracers through timestamps and collection of GPS points with their surveillance data. Deployment of this system began in November 2014 in Conakry, Guinea, and was expanded to a total of 5 prefectures by April 2015. To date, the mobile system has not replaced the paper-based system in the 5 prefectures where the program is active. However, as of April 30, 2015, 210 contact tracers in the 5 prefectures were actively using the mobile system to collectively monitor 9,162 contacts. With proper training, some investment in technical hardware, and adequate managerial oversight, there is opportunity to improve access to surveillance data from difficult-to-reach communities in order to inform epidemic control strategies while strengthening health systems to reduce risk of future disease outbreaks. PMID:26681710

  20. Going beyond DFT for Organic/Titanium Dioxide interfaces

    NASA Astrophysics Data System (ADS)

    Jorge, Leonardo M. Marion; Alves-Santos, Marcelo; Caldas, Marília J.

    2012-02-01

    There is increasing interest in organic/oxide interfaces, particularly for light harvesting and light-emitting devices, and it is important to obtain theoretical information for basic quantities such as the energy-level alignment across the interface. Accurate descriptions of the electronic structure of the composite system, as e.g. [1], are however scarce. The method used should give reliable results for both organic and oxide materials, to guarantee a good description of the hybrid system. In this work we have explored different DFT functionals (PZ-LDA, and those that include a fraction of Exact-Exchange as PBE0, HSE and B3LYP [2]) and compared the results with those obtained by Many-Body Perturbation theory with the GW approximation[3]. We have chosen as prototype systems TiO2, both bulk crystal and model surface, and Thiophene. We have found that none of the used DFT schemes give optimal results for both organic and inorganic systems at the same time, so moving beyond DFT is mandatory.[4pt] [1] C.D. Valentin et.al., Phys. Rev. Lett. 97, 166803 (2006)[0pt] [2] J.P. Perdew et.al., J. Chem. Phys. 105, 9982 (1996); J. Heyd et.al., J. Chem. Phys. 118, 8207 (2003); P.J. Stephens et.al., J. Phys. Chem. 98, 11623 (1994)[0pt] [3] A. Marini et.al., Comp. Phys. Comm. 180, 1392 (2009)

  1. Possible Late Quaternary faulting in the Benton Hills, southeastern Missouri

    SciTech Connect

    Palmer, J.R.; Hoffman, D. . Dept. of Natural Resources)

    1993-03-01

    Geologic mapping in the 1930's by Dan Stewart and Lyle McManamy identified numerous faults in the Thebes Gap area of the Benton Hills, including two post-late Quaternary faults (max. of 10 m displacement) along the southeastern escarpment. Recent geologic mapping (Richard Harrison, pers. comm.) suggests dextral strike-slip displacement on most of these faults; some deformation post-dates the Pliocene-Pleistocene Mounds gravel. Small historical earthquake epicenters have been recorded in the Benton Hills area. Review of these data and analysis of the geologic and structural relationships to small- and large-scale drainage and alluvial features suggest tectonic control of the southeastern escarpment of the Benton Hills. The authors propose the coincidence of geologic structures and landforms resembles tectonically active alluvial basin margins, with the Benton Hills southeastern margin representing a fault block uplift escarpment. Future seismic reflection, drilling and trenching studies are planned to determine if the escarpment is fault controlled and of recent origin.

  2. Generation of higher-order harmonics from solid targets irradiated with fs-laser pulses

    NASA Astrophysics Data System (ADS)

    Tsakiris, G. D.

    1998-11-01

    The prospect of laser intensities exceeding the 10^19 W/cm^2 level becoming available from table-top, 10 Hz lasers, has given new impetus to the subject of solid harmonics [1]. After the initial experiments demonstrating the feasibility of harmonic generation with fs-laser pulses [2], the current effort is directed towards finding out the link between relevant plasma parameters and harmonic generation. The questions that arise are what are the limitations inherent to the generation mechanism and how one can optimize the harmonic yield. For example, in experiments using the Ti:sapphire laser ATLAS at Max-Planck Institut für Quantenoptik [3], it was found that the lower the contrast of the laser pulse the weaker the Iλ^2 scaling of the harmonic conversion efficiency. Some of these results are presented and their implications to solid harmonic generation at higher intensities will be discussed. [1] P. Gibbon, IEEE J. of Q. Elec. 33, 1915 (1997). [2] S. Kohlweyer, et al., Optics Comm. 177, 431 (1995). [3] M. Zepf, et al., submitted for publication in Phys. Rev. Lett.

  3. Visualizing 3D fracture morphology in granular media

    NASA Astrophysics Data System (ADS)

    Dalbe, Marie-Julie; Juanes, Ruben

    2015-11-01

    Multiphase flow in porous media plays a fundamental role in many natural and engineered subsurface processes. The interplay between fluid flow, medium deformation and fracture is essential in geoscience problems as disparate as fracking for unconventional hydrocarbon production, conduit formation and methane venting from lake and ocean sediments, and desiccation cracks in soil. Recent work has pointed to the importance of capillary forces in some relevant regimes of fracturing of granular materials (Sandnes et al., Nat. Comm. 2011), leading to the term hydro-capillary fracturing (Holtzman et al., PRL 2012). Most of these experimental and computational investigations have focused, however, on 2D or quasi-2D systems. Here, we develop an experimental set-up that allows us to observe two-phase flow in a 3D granular bed, and control the level of confining stress. We use an index matching technique to directly visualize the injection of a liquid in a granular media saturated with another, immiscible liquid. We determine the key dimensionless groups that control the behavior of the system, and elucidate different regimes of the invasion pattern. We present result for the 3D morphology of the invasion, with particular emphasis on the fracturing regime.

  4. Visualizing 3D Fracture Morphology in Granular Media

    NASA Astrophysics Data System (ADS)

    Dalbe, M. J.; Juanes, R.

    2015-12-01

    Multiphase flow in porous media plays a fundamental role in many natural and engineered subsurface processes. The interplay between fluid flow, medium deformation and fracture is essential in geoscience problems as disparate as fracking for unconventional hydrocarbon production, conduit formation and methane venting from lake and ocean sediments, and desiccation cracks in soil. Recent work has pointed to the importance of capillary forces in some relevant regimes of fracturing of granular materials (Sandnes et al., Nat. Comm. 2011), leading to the term hydro-capillary fracturing (Holtzman et al., PRL 2012). Most of these experimental and computational investigations have focused, however, on 2D or quasi-2D systems. Here, we develop an experimental set-up that allows us to observe two-phase flow in a 3D granular bed, and control the level of confining stress. We use an index matching technique to directly visualize the injection of a liquid in a granular media saturated with another, immiscible liquid. We determine the key dimensionless groups that control the behavior of the system, and elucidate different regimes of the invasion pattern. We present result for the 3D morphology of the invasion, with particular emphasis on the fracturing regime.

  5. Le “limb body Wall complex”: à propos d'une observation assez particulière

    PubMed Central

    Rachad, Myriam; Chaara, Hikmat; Bouguern, Hakima; Melhouf, Abdelillah

    2012-01-01

    Le limb body wall complex (LBWC) est un syndrome poly-malformatif complexe et rare. Nous rapportons le premier cas, décrit au Maroc, de ce syndrome diagnostiqué en anténatal chez une primipare de 20 ans, par une première échographie obstétricale réalisée à 27 semaines d'aménorrhée. Après interruption de grossesse, l'examen macroscopique met en évidence un nouveau-né de sexe masculin, présentant tous les critères diagnostiques d'un LBWC, avec comme particularité, à notre observation, la coexistence de deux types d'attache placento-crânienne et placento-abdominale qui à notre connaissance n'a jamais été décrite auparavant, et peut mettre en question la division de ce syndrome en 2 phénotypes différents, liée à 2 mécanismes étio-pathogéniques distincts. PMID:22514754

  6. Cancer métaplasique du sein: à propos d'un cas

    PubMed Central

    Babahabib, Moulay Abdellah; Chennana, Adil; Hachi, Aymen; Kouach, Jaoud; Moussaoui, Driss; Dhayni, Mohammed

    2014-01-01

    Les carcinomes métaplasiques du sein sont des tumeurs rares. Ils constituent un groupe hétérogène de tumeurs définis selon l'organisation mondiale de la santé comme étant un carcinome canalaire infiltrant mais comportant des zones de remaniements métaplasiques (de type épidermoïde, à cellules fusiformes, chondroïde et osseux ou mixte), qui varient de quelques foyers microscopiques à un remplacement glandulaire complet. Les aspects cliniques et radiologiques ne sont pas spécifiques. Le traitement associe la chirurgie, la radiothérapie et la chimiothérapie. L'hormonothérapie n'a pas de place. Le pronostic est sombre. L'histopathologie combinée à l'immunohistochimie permet de poser un diagnostic sure. Etant donné que la prise en charge thérapeutique est limitée, une nouvelle approche moléculaire pourrait modifier cette contribution faible et mal cernée des traitements systémiques classiques. Les patientes atteintes de carcinome métaplasique mammaire pourraient bénéficier de traitements ciblés, ce qui reste à confirmer par des essais cliniques. PMID:25870723

  7. Une complication exceptionnelle de la pose d'une voie veineuse centrale jugulaire interne: pneumothorax, pneumo médiastin et retro pneumopéritoine et emphysème sous cutané géant

    PubMed Central

    Belkouch, Ahmed; Sirbou, Rachid; Zidouh, Saad; Chouaib, Naoufal; Rafai, Mostafa; Belyamani, Lahcen

    2015-01-01

    L'association: pneumothorax, pneumo médiastin, retro pneumopéritoine et emphysème sous cutané est connue de longue date comme complication de l'intubation et la ventilation mécanique, de l'endoscopie digestive ou de la chirurgie laparoscopique. En dehors de ce contexte, elle demeure inhabituelle surtout dans le cadre de La pose de voies veineuses centrales puisque le risque encouru est celui d'une brèche pleurale avec pneumothorax, il est surtout lié à la mise en place d'un cathéter central sous-clavier plus que lors de la pose d'une voie centrale par voie jugulaire. Nous rapportons le cas d'une patiente qui a souffert d'un pneumothorax associé à, un pneumo médiastin, un rétro pneumopéritoine et un emphysème sous cutané géant, suite à une tentative de catéthérisation de la veine jugulaire interne par voie postérieure. L'intérêt de cette observation réside dans la rareté exceptionnelle de cette association chez une patiente en ventilation spontanée et dans le mécanisme physiopathologique qu'elle suggère. PMID:26140069

  8. Direct evaluation of the hyperconjugative interactions in 1,1,1-trihaloethane (CH3CX3, X = F, Cl, and Br).

    PubMed

    Chen, Zhenhua; Corminboeuf, Clémence; Mo, Yirong

    2014-08-01

    Following the computational strategy proposed by Mulliken in 1939 ( J. Chem. Phys. 1939, 7 (5), 339-352), when the concept of hyperconjugation was coined, we evaluated the hyperconjugative stabilization energy in 1,1,1-trihaloethane using the block-localized wave function (BLW) method. The BLW method is the simplest and most efficient variant of ab initio valence bond (VB) theory and can derive the strictly electron-localized state wave function self-consistently. The latter serves as a reference for the quantification of the electron delocalization effect in terms of the resonance theory. Computations show that the overall hyperconjugative interactions in 1,1,1-trihaloethane, dominated by σ(CH) → σ'(CX) with minor contribution from σ(CX) → σ'(CH), ranges from 9.59 to 7.25 kcal/mol in the staggered structures and decreases in the order Br > Cl > F. This is in accord with the (1)H NMR spectra of CH3CX3. Notably, the hyperconjugation effect accounts for 35-40% of the rotation barriers in these molecules, which are dominated by the conventional steric repulsion. This is consistent with the recent findings with 1,2-difluoroethane (Freitas, Bühl, and O'Hagan. Chem. Comm. 2012, 48, 2433-2435) that the variation of (1)J(CF) with the FCCF torsional angle cannot be well explained by the hyperconjugation model PMID:24041308

  9. An X-ray standing wave study of the diluted magnetic semiconductor Ga(Mn)As

    NASA Astrophysics Data System (ADS)

    Nemsak, Slavomir; Kuo, Cheng-Tai; Schlueter, Christoph; Gehlmann, Mathias; Lin, Shih-Chieh; Doering, Sven; Eschbach, Markus; Mlynczak, Ewa; Plucinski, Lukasz; Borek, Stephan; Minar, Jan; Ohno, Hideo; Lee, Tien-Lin; Schneider, Claus M.; Fadley, Charles S.

    We have combined the recently developed techniques of soft x-ray standing-wave angle-resolved photoemission (SW-ARPES) [Gray et al., EPL 104, 17004 (2013)] and hard x-ray ARPES (HARPES) [Gray et al., Nature Mat. 11, 957 (2012)] so as to be able to use single-crystal Bragg reflection to create the SW [Thiess et al., Sol. St. Comm. 150, 553 (2010)], thus permitting the first measurements of momentum- and element- resolved bulk electronic structure. The strengths of the SW-HARPES method are demonstrated using the dilute magnetic semiconductor Ga(1 - x)MnxAs. A strong SW is generated by Bragg reflection of ca. 3 keV x-rays from the (111) planes of both undoped GaAs and Mn-doped thin films with x=0.05. Due to the uneven occupancy of (111) planes by either Ga(Mn) or As atoms, the element-specific band structure can be obtained with a help of the SW modulation in core levels. Apart from the site specific decomposition of the electronic structure, the SW measurements also confirmed a substitutional presence of Mn atoms at the Ga sites. This technique should be applicable to a broad range of complex materials.

  10. Lupus érythémateux systémique induit par l'isoniazide: une complication rare à craindre

    PubMed Central

    Jguirim, Mahbouba; Jbeli, Amna; Brahim, Hajer Ben; Mhenni, Amira; Youssef, Monia; Touzi, Mongi; Zrour, Sawssen; Bejia, Ismail; Bergaoui, Naceur

    2015-01-01

    Le lupus induit est défini comme un syndrome lupique généralement cutanéo-articulaire secondaire à une exposition continue à un traitement et qui disparaît après arrêt de celle-ci. Nous rapportons deux cas de lupus induit par l'isoniazide. Il s'agissait de deux femmes âgées respectivement de 30 et 35 ans. Elles présentaient un lupus induit par l'isoniazide après un et deux mois de traitement d'une tuberculose ganglionnaire. La maladie s'est manifestée par des signes articulaires, une éruption cutanée, une leucopénie et une anémie. Les anticorps antinucléaires et les anticorps antihistone étaient présents dans le sérum des deux malades. L’évolution était favorable après arrêt de l'isoniazide et une corticothérapie per os. Les médicaments antituberculeux notamment l'isoniazide sont responsables d'effets indésirables fréquents. Le lupus induit doit être évoqué lorsqu'un patient présente un tableau clinico-biologique évocateur. PMID:26430478

  11. An investigation of siderophore production by oceanic Synechococcus

    NASA Astrophysics Data System (ADS)

    Wisniewski, R. J.; Webb, E. A.; Moffett, J. W.

    2003-04-01

    Cyanobacteria are significant contributors to global primary production. They can be found in warm high-nutrient, low-chlorophyll regions where low concentrations of iron are thought to limit primary productivity. Determining how these organisms obtain iron is critical to understanding the biogeochemical cycle of iron and its role as a determinant of marine primary production. Siderophore production has been observed in halotolerant freshwater cyanobacteria (see C.G. Trick and co-authors) and marine heterotrophic bacteria (see A. Butler, M.G. Haygood and co-authors), but to date, siderophore production in truly marine cyanobacteria has not been demonstrated. We examined the response of two marine Synechococcus species (WH7803 and WH8102) to iron stress. Axenic cultures of both Synechococcus species were grown under iron-stressed and iron-replete conditions. The supernatants of these cultures were examined using competitive ligand exchange-cathodic stripping voltammetry (CLE-CSV), a sensitive method of quantitative ligand detection. Observing ligand accumulation in culture is an analytical challenge due to the low cell densities and reduced growth rates of iron stressed marine cyanobacteria. Preliminary results suggest the presence of an iron-binding ligand in the iron-stressed cultures which was not present under iron-replete conditions. The amount of ligand produced by Synechococcus was approximately 1 × 10-18 mol/cell, comparable with the amount produced by marine heterotrophic bacteria (K. Barbeau, pers. comm.).

  12. Future In-Space Operations for Astronomy

    NASA Astrophysics Data System (ADS)

    Thronson, Harley A.

    2006-12-01

    Our most ambitious free-space space astronomy endeavors can be realized using architectures that could come out of the Vision for Space Exploration. Future in-space operations (FISO) encompass assembly and construction, testing, servicing and maintenance activities in free-space. It is the enabling strategy for large optical and mechanical systems that cannot be autonomously deployed out of a single launch vehicle, and those high value systems for which lifetime enhancement (upgrades, maintenance, repairs) can offer value. Long-range priority goals in astronomy require filled apertures far larger than under development for the JWST. Since these are vastly greater in diameter than can be accommodated within plausible future launch vehicles, complex in-space deployment or assembly will be essential to achieve future goals for astronomy. As the in-space success with the Hubble Space Telescope has demonstrated, human involvement can dramatically benefit service and maintenance of astronomical facilities in space. Advances in capabilities in robotics will augment and complement this. FISO involves advanced systems for space telerobotics, automated rendezvous and docking, power/propulsion, keep-alive utilities (power, comm, nav, attitude, station-keeping, etc), special-purpose tools, environmental protection and verification equipment. In-space operations can make effective use of the technology, facilities and capabilities being created if future applications are anticipated, since FISO is a natural extension of current ESAS and VSE planning.

  13. Rovibrational CO analysis in PDR models

    NASA Astrophysics Data System (ADS)

    Stancil, Phillip C.; Cumbee, Renata; Zhang, Ziwei; Walker, Kyle M.; Yang, Benhui; Ferland, Gary J.

    2016-01-01

    CO is one of the most important molecules in the interstellar medium and in photodissociation regions (PDRs). Most of the extragalactic non-stellar IR to submm CO emission originates in PDRs. (Hollenbach & Tielens 1999). Pure rotational CO lines have been previously used in PDR models to provide density, temperature, and other diagnostics. However, for environments exposed to intense UV radiation, CO vibrational levels become significantly populated. Given new calculations of rovibrational collisional rate coefficients for CO-H (Walker et al. 2015, Song et al. 2015) and CO-H2 (Yang et al. 2015), we explore their effects in standard Cloudy PDR (Ferland et al. 2013) and Radex (van der Tak et al. 2007) models. In particular, CO vibrational transitions due to H2 collisions are studied for the first time using reliable full-dimensional CO-H2 collisional data.Ferland, G. J., et al. 2013, Rev. Mex. Astron. y Astrof., 49, 137Hollenbach, D. J. & Tielens, A. G. G. M. 1999, RMP, 71, 173Song, L., et al. 2015, ApJ, in pressvan der Tak, F. F. S, et al. 2007, A&A, 468, 627Walker, K. M., et al. 2015, ApJ, 811, 27Yang, B., et al. 2015, Nature Comm., 6, 6629This work was supported in part by NASA grants NNX12AF42G and NNX15AI61G.

  14. Predictors, Moderators, and Treatment Parameters of Community and Clinic-Based Treatment for Child Disruptive Behavior Disorders

    PubMed Central

    Kolko, David J.

    2014-01-01

    This study examines predictors, moderators, and treatment parameters associated with two key child outcomes in a recent clinical trial comparing the effects of a modular treatment that was applied by study clinicians in the community (COMM) or a clinic (CLINIC) for children with oppositional defiant disorder (ODD) or conduct disorder (CD). Based on a literature review, moderator and predictor variables across child, parent, and family domains were examined in relation to changes in parental ratings of the severity of externalizing behavior problems or the number of ODD and CD symptoms endorsed on psychiatric interview at pretreatment, posttreatment, and 36-month posttreatment follow-up. In addition, associations between parameters of treatment (e.g., hours of child, parent, and parent–child treatment received, treatment completion, referral for additional services at discharge) and child outcomes were explored. Path models identified few moderators (e.g., level of child impairment, attention deficit hyperactivity disorder diagnosis, level of family conflict) and several predictors (child trauma history, family income, parental employment, parental depression) of treatment response. Treatment response was also related to a few treatment parameters (e.g., hours of child and parent treatment received, treatment completion, referral for additional services at discharge). We discuss the implications of these findings for maximizing the benefits of modular treatment by optimizing or personalizing intervention approaches for children with behavior disorders. PMID:25750506

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

    NASA Astrophysics Data System (ADS)

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

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

  16. Investigation on the near-wake flow structures of a utility-scale wind turbine using snowflake based flow visualization

    NASA Astrophysics Data System (ADS)

    Dasari, Teja; Toloui, Mostafa; Guala, Michele; Hong, Jiarong

    2015-11-01

    Super-large-scale particle image velocimetry and flow visualization techniques using natural snow particles have been shown as an effective tool to probe the structure of the flow around full-scale wind turbines (Hong et al. Nature Comm. 2014). Here we present a follow-up study based on the data collected during a deployment around the 2.5 MW wind turbine at EOLOS Wind Energy Research Station on April, 4th, 2014. The dataset includes the snow visualization of flow fields from different perspectives in the near wake of the turbine. The motions of the dominant coherent structures including tip, blade root, hub and tower vortices, represented by the snow voids, are examined with the objective of quantifying and correlating their behavior with the meteorological and turbine operating conditions. Some preliminary studies on flow-structure interaction are also performed by correlating the data from strain gauges, accelerometers mounted on the turbine blades, with the flow measurements. The statistical analysis of the motions of blade induced vortices shows a clear impact of atmospheric turbulence and vortex interaction on flow development in the near wake. The result further indicates a strong connection between near-wake vorticity field, turbine operation and structure deformations. The work was supported by National Science Foundation (NSF-CBET-1454259) and the research infrastructure was supported by Department of Energy.

  17. Water-ice clouds in the Martian North Polar Region

    NASA Astrophysics Data System (ADS)

    Tamppari, L. K.; Qu, Z.; Smith, M. D.; Bass, D. S.; Hale, A. S.

    2004-11-01

    There has been uncertainty about the amount of water cycling in and out of the polar region during the northern spring/summer timeframe, as evidenced by visible brightness changes in the residual polar cap from year to year which were originally though to be interannual variations (James and Martin, 1995; Kieffer, 1990). Subsequently, through comparison of Viking and Mariner 9 data sets, these variations were thought to be late season water deposition (Bass et al., 2000: Bass and Paige, 2000), perhaps in the form of direct condensation or snowfall. More recently, examination of multi-year MGS MOC data (Hale et al., 2004) opens this question again. Water cycling can be assessed using data sets by examination of water vapor, polar cap changes, and water-ice clouds. In this presentation, we examine the Mars Global Surveyor (MGS) Thermal Emission Spectrometer (TES) nadir pointed data in the north polar region of Mars during northern spring and summer to find and map water-ice clouds. Water-ice clouds, in the north polar region, have previously been tentatively identified in the Viking data (Tamppari and Bass, 2000), and some water-ice clouds identifications have been made in the north polar region during the MGS era (M. Smith, pers. comm., 2001). We present our results of water-ice clouds for 3 Mars years' spring and summer times, including opacities, spatial and temporal variations.

  18. Strong Turbulence in Alkali Halide Negative Ion Plasmas

    NASA Astrophysics Data System (ADS)

    Sheehan, Daniel

    1999-11-01

    Negative ion plasmas (NIPs) are charge-neutral plasmas in which the negative charge is dominated by negative ions rather than electrons. They are found in laser discharges, combustion products, semiconductor manufacturing processes, stellar atmospheres, pulsar magnetospheres, and the Earth's ionosphere, both naturally and man-made. They often display signatures of strong turbulence^1. Development of a novel, compact, unmagnetized alkali halide (MX) NIP source will be discussed, it incorporating a ohmically-heated incandescent (2500K) tantulum solenoid (3cm dia, 15 cm long) with heat shields. The solenoid ionizes the MX vapor and confines contaminant electrons, allowing a very dry (electron-free) source. Plasma densities of 10^10 cm-3 and positive to negative ion mass ratios of 1 <= fracm_+m- <= 20 are achievable. The source will allow tests of strong turbulence theory^2. 1 Sheehan, D.P., et al., Phys. Fluids B5, 1593 (1993). 2 Tsytovich, V. and Wharton, C.W., Comm. Plasma Phys. Cont. Fusion 4, 91 (1978).

  19. Radio Timing and Optical Photometry of the Black Widow System PSR J1953+1846A in the Globular Cluster M71

    NASA Astrophysics Data System (ADS)

    Cadelano, M.; Pallanca, C.; Ferraro, F. R.; Stairs, I.; Ransom, S. M.; Dalessandro, E.; Lanzoni, B.; Hessels, J. W. T.; Freire, P. C. C.

    2015-07-01

    We report on the determination of the astrometric, spin, and orbital parameters for PSR J1953+1846 A, a “black widow” binary millisecond pulsar in the globular cluster M71. By using the accurate position and orbital parameters obtained from radio timing, we identified the optical companion in Advanced Camera for Surveys/Hubble Space Telescope images. It turns out to be a faint ({m}{{F}606{{W}}}≳ 24, {m}{{F}814{{W}}}≳ 23) and variable star located at only ˜0.″06 from the pulsar timing position. The light curve shows a maximum at the pulsar inferior conjunction and a minimum at the pulsar superior conjunction, thus confirming the association with the system. The shape of the optical modulation suggests that the companion star is heated, likely by the pulsar wind. The comparison with the X-ray light curve possibly suggests the presence of an intra-binary shock due to the interaction between the pulsar wind and the material released by the companion. This is the second identification (after COM-M5C) of an optical companion to a black widow pulsar in a globular cluster. Interestingly, the two companions show a similar light curve and share the same position in the color-magnitude diagram. Based on observations collected with the NASA/ESA HST (Prop. 12932), obtained at the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS5-26555.

  20. Harmonic Generation from Solid Targets - Optmization of Source Parameters

    NASA Astrophysics Data System (ADS)

    Zepf, Matthew; Watts, I. F.; Dangor, A. E.; Norreys, P. A.; Chambers, D. M.; Machacek, A.; Wark, J. S.; Tsakiris, G. D.

    1998-11-01

    High harmonics from solid targets have received renewed interest over the last few years. Theoretical predictions using 1 1/2 D codes suggest that very high orders (>100 ) can be generated at conversion efficiencies in excess of 10-6 [1,2] at Iλ^2 > 10^19 W/cm^2. Experiments have since been performed with pulses varying from 100 fs to 2.5 ps in duration [3-6]. The steep density gradient necessary to generate the harmonics can be generated by either ponderomotive steepening or by using ultraclean pulses which preserve the initial solid vacuum boundary. The two regimes are compared in terms of their dependence on the laser parameters and the emitted harmonic radiation. Particular emphasis will be given to measurements of the holeboring velocity, the polarisation of the harmonics and the intensity scaling in the two regimes. This comparison enables us to find the ideal parameter range for the optimization of harmonic source. [1] R. Lichters et al., Physics of Plasmas 3, 3425, (1996). [2] P. Gibbon, IEEE J. of Q. Elec. 33, 1915 (1997). [3] S. Kohlweyer, et al., Optics Comm. 177, 431 (1995). [4] P. Norreys et al., Phys. Rev. Lett., 76, 1832 (1995). [5] D. von der Linde et al., Phys. Rev. A, 52, R25 (1995) [6] M. Zepf, et al., submitted for publication in Phys. Rev. Lett.

  1. Bandwidth utilization maximization of scientific RF communication systems

    SciTech Connect

    Rey, D.; Ryan, W.; Ross, M.

    1997-01-01

    A method for more efficiently utilizing the frequency bandwidth allocated for data transmission is presented. Current space and range communication systems use modulation and coding schemes that transmit 0.5 to 1.0 bits per second per Hertz of radio frequency bandwidth. The goal in this LDRD project is to increase the bandwidth utilization by employing advanced digital communications techniques. This is done with little or no increase in the transmit power which is usually very limited on airborne systems. Teaming with New Mexico State University, an implementation of trellis coded modulation (TCM), a coding and modulation scheme pioneered by Ungerboeck, was developed for this application and simulated on a computer. TCM provides a means for reliably transmitting data while simultaneously increasing bandwidth efficiency. The penalty is increased receiver complexity. In particular, the trellis decoder requires high-speed, application-specific digital signal processing (DSP) chips. A system solution based on the QualComm Viterbi decoder and the Graychip DSP receiver chips is presented.

  2. A study of the fracture process and factors that control toughness variability in Charpy V-notch specimens

    NASA Astrophysics Data System (ADS)

    Bouchard, Real

    La presente etude a ete initiee pour developper une comprehension quantitative du processus de rupture avec les facteurs qui controlent la dispersion des mesures de tenacite lorsque des eprouvettes Charpy entaillees en V sont utilisees. Un grand nombre d'essais ont ete realises pour un acier C-Mn: eprouvettes Charpy testees sous impact, eprouvettes Charpy testees en flexion lente, eprouvettes axisymetriques entaillees et sollicitees en traction et essais de tenacite sur eprouvettes prefissurees. Base sur le concept de la statistique de Weibull, l'approche locale developpee par le groupe Beremin a ete utilisee pour decrire la probabilite de rupture par clivage en fonction de la contrainte appliquee aussi bien qu'en fonction de l'energie Charpy obtenue. Le calcul par elements finis a ete realise pour determiner la distribution de la deformation et des contraintes en pointe d'entaille et de fissure. La nouvelle approche introduite decrit bien les resultats experimentaux. Les points d'initiation du clivage ont ete identifies au MEB et par la suite, avec la technique de faisceau d'ions focalise, sectionnes, polis et examines. L'examen de la microstructure sous le point d'initiation revele clairement que le clivage s'initie par un mecanisme d'empilement de dislocations ou les dislocations sont arretees aux joints de grain, aux interfaces de perlite/ferrite ou de perlite qui agissent comme barrieres physiques.

  3. A Review of the McMorran Diet for Rearing Lepidoptera Species With Addition of a Further 39 Species

    PubMed Central

    Hervet, V. A. D.; Laird, R. A.; Floate, K. D.

    2016-01-01

    Research on cutworms led us to explore the use of the McMorran diet to rear lepidopteran species, mainly Noctuidae, under laboratory conditions. We documented the development of 103 lepidopteran species, including 39 species not previously reported in the literature, to be reared on this diet. Given its low cost, ease of preparation, and wide species’ acceptance, this diet provides a powerful tool for facilitating Lepidoptera and other insects rearing and research in the laboratory. Résumé Une recherche sur les noctuelles nous a permis d’élever des larves de nombreuses espèces de lépidoptères, principalement des noctuelles, sur un substrat artificiel du nom de «McMorran diet» en laboratoire. Nous reportons le développement de 103 espèces de lépidoptères, dont 39 espèces qui n’ont pas encore été documentées, comme pouvant se développer sur ce substrat artificiel. Étant donné son faible coût, facilité de préparation, et large champ d’action, ce substrat artificiel peut grandement faciliter la recherche sur les lépidoptères et autres insectes en laboratoire. PMID:26851296

  4. Simulation of the DRIFT Experiment

    NASA Astrophysics Data System (ADS)

    Hyatt, Matt; Ayad, Rachid; Hanson-Hart, Zach; Katz-Hyman, Moshe; Posner, Aaron; Martoff, C. J.

    2003-04-01

    The DRIFT Experiment [1] is an underground search for WIMP Dark Matter using a novel detector invented for this purpose: the Negative Ion TPC (NITPC). To aid in interpreting the results, a simulation code system has been developed. The system uses the CERNLIB program GEANT [2] and the NRC package EGS4 [3] to simulate particle interactions in the detector. These are linked directly to the CERNLIB program GARFIELD, which simulates signal production in the NITPC. Finally the GARFIELD output is converted into the format of the DRIFT DAQ for presentation to the analysis code. The physics and software issues dealt with in this development will be discussed. [1] Low Pressure Negative Ion TPC for Dark Matter Search. D. P. Snowden-Ifft, C. J. Martoff, J. M. Burwell, Phys Rev. D. Rapid Comm. 61, 101301 (2000) [2] GEANT Manual, CERN Program Library Long Writeup W5013, Copyright CERN, Geneva, 1993 . [3] EGS4, National Research Council, Canada. Note PIRS-701. http://www.irs.inms.nrc.ca/inms/irs/EGS4/get_egs4.html . [4] GARFIELD Manual, version 7.04, CERN Program Library Long Writeup W5050, Copyright CERN, Geneva, 2001 .

  5. Angiomyolipomes épithélioïdes rénal bénin: à propos de deux cas

    PubMed Central

    Bagayogo, Tidiani; Othmane, Yddoussalah; Tarik, Karmouni; Khalid, Elkhader; Abdellatif, Koutani; Ahmed, Ibn Attya Andaloussi

    2015-01-01

    Les angiomyolipomes épithélioïdes rénaux (AMLeR) sont des tumeurs rares (identifiées chez moins de 0,1 patients pour 1000 habitants) et représentent 8% des angiomyolipomes (AML) opérés. Il a longtemps été considérécomme un hamartome mais plusieurs articles récents font penser qu'il s'agir d'une tumeur dérivant de cellules épithélioïdespérivasculaires. L'angiomyolipome épithélioïde est une forme rare d'angiomyolipome à potentiel malin, composé decellules épithélioïdes posant des problèmes de diagnostic différentiel avec les carcinomes à cellules rénales. L'immunohistochimie,en révélant la positivité des cellules épithélioïdes au marqueur HMB45 est essentielle au diagnostic. Les auteursrapportent l'aspect tomodensitométrique et histologique d'angiomyolipomes épithélioïdes chez deux patientes. PMID:26953738

  6. Comet 81p/Wild 2: The Updated Stardust Coma Dust Fluence Measurement for Smaller (Sub 10-Micrometre) Particles

    NASA Technical Reports Server (NTRS)

    Price, M. C.; Kearsley, A. T.; Burchell, M. J.; Horz, Friedrich; Cole, M. J.

    2009-01-01

    Micrometre and smaller scale dust within cometary comae can be observed by telescopic remote sensing spectroscopy [1] and the particle size and abundance can be measured by in situ spacecraft impact detectors [2]. Initial interpretation of the samples returned from comet 81P/Wild 2 by the Stardust spacecraft [3] appears to show that very fine dust contributes not only a small fraction of the solid mass, but is also relatively sparse [4], with a low negative power function describing grain size distribution, contrasting with an apparent abundance indicated by the on-board Dust Flux Monitor Instrument (DFMI) [5] operational during the encounter. For particles above 10 m diameter there is good correspondence between results from the DFMI and the particle size inferred from experimental calibration [6] of measured aerogel track and aluminium foil crater dimensions (as seen in Figure 4 of [4]). However, divergence between data-sets becomes apparent at smaller sizes, especially submicrometre, where the returned sample data are based upon location and measurement of tiny craters found by electron microscopy of Al foils. Here effects of detection efficiency tail-off at each search magnification can be seen in the down-scale flattening of each scale component, but are reliably compensated by sensible extrapolation between segments. There is also no evidence of malfunction in the operation of DFMI during passage through the coma (S. Green, personal comm.), so can the two data sets be reconciled?

  7. Weberized Mumford-Shah Model with Bose-Einstein Photon Noise

    SciTech Connect

    Shen Jianhong Jung, Yoon-Mo

    2006-05-15

    Human vision works equally well in a large dynamic range of light intensities, from only a few photons to typical midday sunlight. Contributing to such remarkable flexibility is a famous law in perceptual (both visual and aural) psychology and psychophysics known as Weber's Law. The current paper develops a new segmentation model based on the integration of Weber's Law and the celebrated Mumford-Shah segmentation model (Comm. Pure Appl. Math., vol. 42, pp. 577-685, 1989). Explained in detail are issues concerning why the classical Mumford-Shah model lacks light adaptivity, and why its 'weberized' version can more faithfully reflect human vision's superior segmentation capability in a variety of illuminance conditions from dawn to dusk. It is also argued that the popular Gaussian noise model is physically inappropriate for the weberization procedure. As a result, the intrinsic thermal noise of photon ensembles is introduced based on Bose and Einstein's distributions in quantum statistics, which turns out to be compatible with weberization both analytically and computationally. The current paper focuses on both the theory and computation of the weberized Mumford-Shah model with Bose-Einstein noise. In particular, Ambrosio-Tortorelli's {gamma}-convergence approximation theory is adapted (Boll. Un. Mat. Ital. B, vol. 6, pp. 105-123, 1992), and stable numerical algorithms are developed for the associated pair ofnonlinear Euler-Lagrange PDEs.

  8. Atmospheric Fragmentation of the Canyon Diablo Meteoroid

    NASA Technical Reports Server (NTRS)

    Pierazzo, E.; Artemieva, N. A.

    2005-01-01

    About 50 kyr ago the impact of an iron meteoroid excavated Meteor Crater, Arizona, the first terrestrial structure widely recognized as a meteorite impact crater. Recent studies of ballistically dispersed impact melts from Meteor Crater indicate a compositionally unusually heterogeneous impact melt with high SiO2 and exceptionally high (10 to 25% on average) levels of projectile contamination. These are observations that must be explained by any theoretical modeling of the impact event. Simple atmospheric entry models for an iron meteorite similar to Canyon Diablo indicate that the surface impact speed should have been around 12 km/s [Melosh, personal comm.], not the 15-20 km/s generally assumed in previous impact models. This may help explaining the unusual characteristics of the impact melt at Meteor Crater. We present alternative initial estimates of the motion in the atmosphere of an iron projectile similar to Canyon Diablo, to constraint the initial conditions of the impact event that generated Meteor Crater.

  9. Microstructural study of mechanical properties of the ABA triblock copolymer using self-consistent field and molecular dynamics

    NASA Astrophysics Data System (ADS)

    Aoyagi, Takeshi; Honda, Takashi; Doi, Masao

    2002-11-01

    The molecular mechanism of the strain-stress behavior of the ABA triblock copolymer is studied by combining self-consistent field (SCF) calculation and molecular dynamics (MD) simulation. First, the equilibrium structure was obtained by the SCF calculation. The bridge fraction phibridge was found to be about 0.4, 0.6, and 0.8 for lamellar, cylindrical, and spherical phases, respectively. From the segment distribution calculated by the SCF, the equilibrium chain configuration was generated by the method reported previously [Aoyagi [et al.], Comput. Phys. Comm. 145, 267 (2002)]. The loading and unloading behavior was then studied by the MD simulation. The loading curve shows a strain-softening, and then a yielding at a strain of about 350%, where the breakup of microdomains takes place. The strain-stress curve in the second elongation-compression cycle is different from that of the first cycle. Such hysteresis effect is seen also for small elongation where the domain breakup does not take place.

  10. Conformational Landscape of Nicotinoids: Solving the "conformational - Rity" of Anabasine

    NASA Astrophysics Data System (ADS)

    Lesarri, Alberto; Cocinero, Emilio J.; Evangelisti, Luca; Suenram, Richard D.; Caminati, Walther; Grabow, Jens-Uwe

    2010-06-01

    The conformational landscape of the alkaloid anabasine (neonicotine) has been investigated using rotational spectroscopy and ab initio calculations. The results allow a detailed comparison of the structural properties of the prototype piperidinic and pyrrolidinic nicotinoids (anabasine vs. nicotine). Anabasine adopts two most stable conformations in isolation conditions, for which we determined accurate rotational and nuclear quadrupole coupling parameters. The preferred conformations are characterized by an equatorial pyridine moiety and additional N-H equatorial stereochemistry at the piperidine ring (Eq-Eq). The two rings of anabasine are close to a bisecting arrangement, with the observed conformations differing in a ca. 180° rotation of the pyridine subunit, denoted either Syn or Anti. The preference of anabasine for the Eq-Eq-Syn conformation has been established by relative intensity measurements (Syn/Anti˜5(2)). The conformational preferences of free anabasine are directed by a N\\cdot\\cdot\\cdotH-C weak hydrogen bond interaction between the nitrogen lone pair at piperidine and the closest hydrogen bond in pyridine, with N\\cdot\\cdot\\cdotN distances ranging from 4.750 Å (Syn) to 4.233 Å (Anti). R. J. Lavrich, R. D. Suenram, D. F. Plusquellic and S. Davis, 58^th OSU Int. Symp. on Mol. Spectrosc., Columbus, OH, 2003, Comm. RH13.

  11. Bohr's Semiclassical Model of the Black Hole Thermodynamics

    NASA Astrophysics Data System (ADS)

    Pankovic, V.; Predojevic, M.; Grujic, P.

    2008-06-01

    ekenstein, J. D. 1973, Phys. Rev. D, 7, 2333 Bekenstein, J. D. 1994, gr-qc/9409015v2 Bekenstein, J. D. 1998, gr-qc/9808028v3 Frasca, M. 2005, hep-th/0411245v4 Grujic, P. V. 1993, Bull. Astron. Belgrade, 147, 15 Hawking, S. W. 1975, Comm. Math. Phys., 43, 199 Hawking, S. W. 1979, in "General Relativity, an Einstein Centenary Survey," Eds. S. W. Hawking and W. Israel (Cambridge: Cambridge University Press) Nagatani, Y. 2007, Progr. Theor. Phys. Suppl., 164, 54 Nicolai,H., Peeters, K., & Zamaklar, M. 2005, Class. Quantum Grav., 22, R193 Norcliffe A. 1975, in "Case Studies in Atomic Physics - Vol. 4," Eds. E. W. McDaniel and M. R. McDowell (Amsterdam: North-Holland), 46 Page, D. N. 2004, hep-th/0409024 Pavon, D. 2007, J. Phys. A, 40, 6865 Proline, B. 2006, hep-th/0607227 Ram, B. 2000, Phys. Lett. A, 265, 1 Ram, B., Ram, A, Ram, N. 2005, The Quantum Black Hole, gr-qc/0504030 Samuel, J., & Chowdhury, S. R. 2007, Class. Quantum Grav., 24, F47 Strominger, D. N., Vafa, C. 1996, Phys. Lett. B, 339, 99 Wald, R. M. 1997, gr-qc/9702022 Wald, R. M. 1999, gr-qc/9912119

  12. A finite volume method for fluctuating hydrodynamics of simple fluids

    NASA Astrophysics Data System (ADS)

    Narayanan, Kiran; Samtaney, Ravi; Moran, Brian

    2015-11-01

    Fluctuating hydrodynamics accounts for stochastic effects that arise at mesoscopic and macroscopic scales. We present a finite volume method for numerical solutions of the fluctuating compressible Navier Stokes equations. Case studies for simple fluids are demonstrated via the use of two different equations of state (EOS) : a perfect gas EOS, and a Lennard-Jones EOS for liquid argon developed by Johnson et al. (Mol. Phys. 1993). We extend the fourth order conservative finite volume scheme originally developed by McCorquodale and Colella (Comm. in App. Math. & Comput. Sci. 2011), to evaluate the deterministic and stochastic fluxes. The expressions for the cell-centered discretizations of the stochastic shear stress and stochastic heat flux are adopted from Espanol, P (Physica A. 1998), where the discretizations were shown to satisfy the fluctuation-dissipation theorem. A third order Runge-Kutta scheme with weights proposed by Delong et al. (Phy. Rev. E. 2013) is used for the numerical time integration. Accuracy of the proposed scheme will be demonstrated. Comparisons of the numerical solution against theory for a perfect gas as well as liquid argon will be presented. Regularizations of the stochastic fluxes in the limit of zero mesh sizes will be discussed. Supported by KAUST Baseline Research Funds.

  13. La Prise en Charge des Brulures Electriques: a Propos de 30 Cas

    PubMed Central

    Bakkali, H.; Ababou, K.; Bellamari, H.; Ennouhi, A.; Nassim Sabah, T.; Achbouk, A.; Moussaoui, A.; Fouadi, F.Z.; Siah, S.; Ihrai, H.

    2009-01-01

    Summary Les brûlures électriques sont rares mais graves nécessitant une prise en charge urgente et adéquate car l'évolution peut être émaillée de complications graves, notamment cardiaques, neurologiques et rénales, et les séquelles sont importantes. A travers une étude analytique et rétrospective de janvier 2000 à novembre 2007 ayant inclus 30 patients admis au Service des Brûlés de l'Hôpital Militaire d'Instruction Mohamed V de Rabat, Maroc, pour prise en charge de brûlures électriques, il a été relaté les mécanismes des brûlures électriques, comme aussi les complications, la morbidité et la mortalité, dues aux brûlures électriques, tout en insistant sur les modalités de prise en charge initiale chez ces patients. La prévention reste le point capital pour réduire l'incidence de ces accidents. Cette prévention se base sur la surveillance des enfants et l'élimination de facteurs de risque à la maison, par la maintenance des installations électriques et par l'information et l'éducation du public. PMID:21991148

  14. Lymphangioléiomyomatose pulmonaire de révélation inhabituelle au cours d'une sclérose en plaque

    PubMed Central

    Jaafoura, Neirouz Ghannouchi; Guigua, Ahmed; Zaghouani, Houneida; Atig, Amira; Bakir, Dajla; Khalifa, Mabrouk; Bahri, Fethi

    2015-01-01

    La lymphangioléiomyomatose pulmonaire est une pathologie rare de la femme jeune, caractérisée par une prolifération de cellules musculaires lisses immatures, aboutissant à la destruction kystique des poumons avec possibilité d’évolution vers l'insuffisance respiratoire chronique. La découverte est souvent fortuite lors de la prise en charge d'une autre pathologie pulmonaire. Son association à une sclérose en plaque n'a jamais été rapportée, de même que l'embolie pulmonaire in situ comme manifestation inaugurale. Nous rapportons l'observation d'une patiente âgée de 39 ans, suivie pour sclérose en plaque depuis 20 ans, chez qui le diagnostic d'une lymphangioléiomyomatose pulmonaire a été posé, à l'occasion d'une broncho-pneumopathie bilatérale avec une embolie pulmonaire associée motivant la réalisation d'un angioscanner thoracique. PMID:26185588

  15. Les carcinomes de la thyroïde: profils épidémiologique, clinique et thérapeutique, à propos de 102 cas

    PubMed Central

    Touati, Mohamed Mliha; Aljalil, Abdelfettah; Darouassi, Youssef; Chihani, Mehdi; Lahkim, Mohammed; Fihri, Jawad Al Fassi; Bouaity, Brahim; Ammar, Haddou

    2015-01-01

    Les carcinomes thyroïdiens sont des tumeurs malignes assez rares, représentant 1% des cancers. Ils sont généralement de bon pronostic, et présentent des aspects cliniques et évolutifs variés selon leur origine histologique. Notre travail est une étude rétrospective portant sur 102 cas de carcinomes de la thyroïde, colligés sur un nombre total de 811 gestes chirurgicaux thyroïdiens, au service d'oto-rhino-laryngologie et de chirurgie cervico-faciale de l'hôpital militaire Avicenne de Marrakech, sur une période de 8 ans, allant de janvier 2006 à décembre 2013. Les carcinomes thyroïdiens atteignent le sujet jeune avant l’âge de 50 ans, en particulier le sexe féminin. La tendance dans les pays en voie de développement, comme dans le monde entier est en croissance continue, ceci peut être expliqué par l'amélioration des outils d'imagerie et des moyens diagnostiques cytologiques et anatomo-pathologiques. PMID:26405495

  16. High-resolution Valence and Core Excitation Spectra via First-Principles Calculations and Experiment

    NASA Astrophysics Data System (ADS)

    Shirley, Eric; Fossard, F.; Gilmore, K.; Hug, G.; Kas, J. J.; Rehr, J. J.; Vila, F.

    We calculate the optical and C K-edge near edge spectra of crystalline and molecular C60 measured with high-resolution electron energy-loss spectroscopy. The calculations are carried out using at least three different methods: Bethe-Salpeter calculations using the NIST Bethe-Salpeter Equation solver (NBSE) in the valence and OCEAN (Obtaining Core Excitation with Ab initio methods and NBSE) suite [Gilmore et al., Comp. Phys. Comm., (2015)]; excited-core-hole calculations using XCH [D. Prendergast and G. Galli, Phys. Rev. Lett. 96, 215502 (2006)]; and constrained occupancy using StoBe (Stockholm-Berlin core-excitation code) [StoBe-deMon version 3.0, K. Hermann et al. (2009)]. They include self-energy effects, lifetime-damping, and Debye-Waller effects. A comparison of spectral features to those observed illustrates the sensitivity of certain features to computation details (e.g., self-energy corrections and core-hole screening). This may point to limitations of various approximations, e.g. in conventional BSE paradigm and/or the incomplete treatment of vibrational effects. Supported in part by DOE BES Grant DE-FG03-97ER45623 (JJR, JJK, FV).

  17. Brulure et Grossesse: A Propos de Deux Cas et Revue de la Litterature

    PubMed Central

    Khales, A.; Achbouk, A.; Siah, S.; Ihrai, H.

    2010-01-01

    Summary Les brûlures thermiques au cours de la grossesse sont rares, cependant elles requièrent une attention particulière du fait qu'elles engagent le pronostic maternel et foetal. Les Auteurs rapportent deux observations qui illustrent la gravité de cette association. Le traitement des brûlures pendant la grossesse connaît des particularités en rapport avec les modifications anatomiques et physiologiques de la gestation. Certains Auteurs ont préconisé des recommandations, comme en particulier le traitement précoce de la thrombose veineuse et la surveillance obstétricale avec un accouchement dirigé à l'approche du terme. La mortalité maternelle et périnatale augmente significativement à partir de 50% de la surface corporelle brûlée. De ce fait une prise en charge multidisciplinaire est indispensable. Le pronostic de brûlure chez la femme enceinte reste très réservé, d'où l'intérêt d'une prise en charge multidisciplinaire réunissant obstétricien, réanimateur et plasticien. PMID:21991201

  18. Issues in Kinetic Edge Turbulence Simulation

    NASA Astrophysics Data System (ADS)

    Parker, S. E.; Chen, Y.; Lang, J.

    2006-10-01

    Simulations of trapped electron modes are underway using GEM [1,2], a global electromagnetic gyrokinetic delta-f simulation with collisions. We report results with no temperature gradient so that ITG and ETG instabilities are not present. For typical weak density gradient core values, the CTEM is dominant. However, for steeper density gradient edge values, higher k drift-waves are most unstable [J. Lang this mtg.]. For the weaker density gradient core case, nonlinear simulations using GEM are routine. For the steeper gradient edge case, the nonlinear fluctuations are very high and a stationary state has not been obtained. More physics, e.g. profile variation and equilibrium ExB shear flow should be significantly stabilizing, and may make such simulations feasible using standard delta-f techniques. These features are fully implemented in GEM and research is ongoing. One approach to addressing the high fluctuation levels in the edge turbulence regime is the particle-continuum method [3]. A new scheme that periodically resets the particle weights, using a Maxwellian particle load is being tested in GEM [Y. Chen this mtg.] and will be discussed. [1] Y. Chen, S. Parker, J. Comput. Phys. 189 463 (2003). [2] Y. Chen, S. Parker, accepted, available on-line, J. Comput. Phys. (2006). [4] S. Vadlamani, S. Parker, Y. Chen and C. Kim, Comput. Phys. Comm. 164 209 (2004).

  19. Progress on long-time kinetic simulation of tokamak turbulence with very weak dissipation

    NASA Astrophysics Data System (ADS)

    Parker, Scott; Chen, Yang; Kahut, Jason

    2006-04-01

    Recent progress on convergence studies of long-time simulations for both electron-temperature-gradient (ETG) and ion-temperature-gradient driven microturbulence will be reported. It was surprising to us to find that low-noise ETG turbulence simulations are well-converged with rather modest particle number (30-70 million particles). Progress on the particle-continuum method [Vadlamani et al., Comp. Phys. Comm., 209 164 (2004)] will also be reported. The particle-continuum method is really a general class of a variety of methods and has been shown to solve the so-called ``growing weight problem" in two-dimensional simulations. The method is implemented in four-dimensions with the μ∇B force neglected. In this case, v is a constant of motion and resetting of the particle δf on a four-dimensional grid is more reasonable. Discussion of issues related to applying particle continuum method in five dimensions will also be presented. Work supported by DOE SciDAC Gyrokinetic Particle Simulation Center and Center for Plasma Edge Simulation.

  20. Notes on the geographic variation of Lopinga gerdae Nordström, 1934 Lepidoptera, Nymphalidae, Satyrinae).

    PubMed

    Huang, Si-Yao; Lang, Song-Yun

    2016-01-01

    Lopinga gerdae Nordström, 1934 (Satyrini) is a species geographically restricted to S. Gansu, Northwest China. It was described from four males and one female collected from "Ka-tien-kou" on 18.VII.[1930] and "Kung-tze-tagga im Tsaluk-Tal, Minshan" on 19.VII.[1930] by Dr. David Hummel (Nordström, 1934). Though exact sites could not be located, we were able to confirm that "Ka-tien-kou" and "Kung-tze-tagga" are two small places in a valley of Minshan Mts. in the southwestern part of the Jone [Choni in Nordström (1934)] County. In recent years, specimens of this species were collected from Tewo by Eckweiler (Görgner, 1990), from Xiahe by Bozano (Bozano, 1999), from Daban-shan by Floriani I., Floriani A. and Saldaitis A. (Bozano pers. comm.), and from Liupan-shan by Chinese researchers. Specimens from different localities having been compared and their distribution considered, it is found that this species varies continuously from west to east in its small range (Fig. 16), with the individuals collected around the type locality being the intermediate form. However, after dissecting the male genitalia, the result suggests that the populations from Xiahe and Liupan-shan should still be regarded as extreme forms of the same species. PMID:27615915

  1. Validation of a Brief Opioid Compliance Checklist for Patients with Chronic Pain

    PubMed Central

    Jamison, Robert N.; Martel, Marc O.; Edwards, Robert R.; Qian, Jing; Sheehan, Kerry Anne; Ross, Edgar L.

    2014-01-01

    There has been a need for a brief assessment tool to determine compliance with use of prescribed opioids for pain. The purpose of this study was to develop and begin the validation of a brief and simple compliance checklist (Opioid Compliance Checklist; OCC) for chronic pain patients prescribed long-term opioid therapy. A review of the literature of opioid therapy agreements led to a 12-item OCC that was repeatedly administered to 157 patients who were taking opioids for chronic pain and followed for six months. Validation of the OCC was conducted by identifying those patients exhibiting aberrant drug-related behavior as determined by any of the following: positive urine toxicology screen, a positive score on the Prescription Drug Use Questionnaire (PDUQ) interview or Current Opioid Misuse Measure (COMM), and/or ratings by staff on the Addiction Behavior Checklist (ABC). Of the original 12 items, 5 OCC items appeared to best predict subsequent aberrant behaviors based on multivariate logistic regression analyses (cross-validated AUC=.67). Although further testing is needed, these results suggest that the OCC is an easy-to-use, promising measure in monitoring opioid adherence among persons with chronic pain. PMID:25092233

  2. Quantification of the Molecular Topology for Hierarchical Macromolecules

    NASA Astrophysics Data System (ADS)

    Beaucage, Gregory

    2009-03-01

    Hierarchical structures are often produced from ramified macromolecules such as comb, star, hyperbranched and dendritic polymers. We have recently derived a method for the description of complex molecular and nanostructural topologies based on a statistical analysis [1,2]. The method has been applied to a wide range of hierarchical materials from long chain branched polyolefins, hyperbranched polymers [3], star polymers, H-branched polymers to cyclics, biopolymers [4], and branched nanostructured aggregates. This method, when applied to neutron scattering data, yields the mole fraction of a structure involved in branching, the number of branch sites, the average branch length, and the number if inner chain segments. Further, quantitative measures of the convolution or tortuosity of the structure and the connectivity of the branching network can be made, opening a new window for our understanding of complex molecular topologies. This understanding has recently been applied to biological chain molecules to understand protein and RNA folding [4] for example as well as to aggregated, nanostructured, carbon soot. [0pt] [1] Beaucage, G, Phys. Rev. E 2004, 70, 031401. [2] Kulkarni, AS & Beaucage, G, J. Polym. Sci. Part B: Polym. Phys. 2006, 44, 1395. [3] Kulkarni, AS & Beaucage, G, Macromol. Rapid Comm. 2007, 28, 1312.?4) Beaucage, G, Biophysical J. 2008, 95, 503.

  3. Supersymmetry and the unification of fundamental interactions.

    NASA Astrophysics Data System (ADS)

    Fayet, P.

    Les physiciens élaborent progressivement une description unifée des lois de l'Univers, qui fait intervenir des principes de symétrie de plus en plus étendus. La supersymétrie, qui englobe la mécanique quantique et la relativité générale en opérant dans une extension de l'espace-temps ordinaire, appelée le superespace, est-elle l'un de ces principes fondamentaux? Dans cet article, l'auteur explique ce qu'est cette nouvelle symétrie, et comment, pour appliquer celle-ci au monde physique, il a été amené à envisager l'existence de toute une famille de nouvelles particules - comme les photinos, gluinos, squarks et sélectrons - que l'on recherche activement aujourd'hui. On espère parvenir à les détecter grâce aux nouvelles générations d'accélerateurs, et découvrir ainsi un nouveau principe auquel doivent satisfaire toutes les lois physiques, aussi fondamental que la relativité.

  4. An assessment of full wave effects on the propagation and absorption of lower hybrid wavesa)

    NASA Astrophysics Data System (ADS)

    Wright, J. C.; Bonoli, P. T.; Schmidt, A. E.; Phillips, C. K.; Valeo, E. J.; Harvey, R. W.; Brambilla, M. A.

    2009-07-01

    Lower hybrid (LH) waves (Ωci≪ω≪Ωce, where Ωi ,e≡Zi ,eeB/mi ,ec) have the attractive property of damping strongly via electron Landau resonance on relatively fast tail electrons and consequently are well-suited to driving current. Established modeling techniques use Wentzel-Kramers-Brillouin (WKB) expansions with self-consistent non-Maxwellian distributions. Higher order WKB expansions have shown some effects on the parallel wave number evolution and consequently on the damping due to diffraction [G. Pereverzev, Nucl. Fusion 32, 1091 (1991)]. A massively parallel version of the TORIC full wave electromagnetic field solver valid in the LH range of frequencies has been developed [J. C. Wright et al., Comm. Comp. Phys. 4, 545 (2008)] and coupled to an electron Fokker-Planck solver CQL3D [R. W. Harvey and M. G. McCoy, in Proceedings of the IAEA Technical Committee Meeting, Montreal, 1992 (IAEA Institute of Physics Publishing, Vienna, 1993), USDOC/NTIS Document No. DE93002962, pp. 489-526] in order to self-consistently evolve nonthermal electron distributions characteristic of LH current drive (LHCD) experiments in devices such as Alcator C-Mod and ITER (B0≈5 T, ne0≈1×1020 m-3). These simulations represent the first ever self-consistent simulations of LHCD utilizing both a full wave and Fokker-Planck calculation in toroidal geometry.

  5. Test Report for Cricket Radiation Detection System Used In EPA Port Installations

    SciTech Connect

    Shourbaji, AA

    2004-08-11

    Oak Ridge National Laboratory conducted field radiological measurements at two port locations at the request of the Environmental Protection Agency (EPA). The radiological measurements were performed on five radiation detection systems at the port of Darrow, Louisiana and three systems at the port of Charleston, South Carolina. Darrow was visited on January 20-23, 2004 and Charleston on May 25, 2004. All tested systems are designed to detect radioactive material that might be present in scrap metals as the scrap is being unloaded from ships. All eight systems are commercially known as the Cricket and manufactured by RAD/COMM Systems. Each radiation detection system consists of a detector with two channels and a wireless transmitter, both mounted on the grapple, and a controller located in the crane cab. The cranes at both locations are operated by the Cooper T. Smith Company. The purpose of the radiological measurements was to evaluate the performance of the radiation detection systems in terms of their ability to detect elevated radiation levels, and to develop a routine testing method for all EPA Cricket systems.

  6. L'Education relative a l'environnement: La representation sociale d'educatrices et d'educateurs

    NASA Astrophysics Data System (ADS)

    Rooney, Elizabeth

    Cette recherche, qui prend appui sur la theorie des representations sociales, a tente de comprendre le phenomene de l'Education relative a l'environnement (ERE) au Quebec. Pour ce faire, j'ai choisi de m'interesser aux points de vue sur le sujet de neuf enseignantes et enseignants d'ecologie oeuvrant dans des ecoles (contexte formel) et de dix animatrices et animateurs oeuvrant dans des centres d'interpretation (contexte non formel). L'analyse narrative de leurs discours recueillis lors d'entrevues individuelles semi-structurees a permis de montrer que la mise en forme et la mise en pratique de l'ERE tendent a s'inscrire dans le prolongement d'une conception essentiellement ecologique de l'environnement et d'une conception plutot mecaniste et sensualiste de l'education, c'est-a-dire comme une simple affaire de transmission de connaissances scientifiques et d'eveil d'acuite sensorielle. Cette analyse a egalement permis de montrer que les educatrices et les educateurs retravaillent ces conceptions pour composer avec les moments et les lieux singuliers de leurs pratiques. Ce faisant, ils innovent et soulevent des questions a propos de la teneur des conceptions ou definitions standardisees de l'ERE. Cette recherche permet ainsi d'eclairer l'aspect a la fois traditionnel et potentiellement innovateur de la representation sociale de l'ERE d'educatrices et d'educateurs de terrain.

  7. Implementation of Vacuum Region in NIMROD

    NASA Astrophysics Data System (ADS)

    Kruger, Scott; Sovinec, Carl

    1999-11-01

    MHD stability limits in experiments depend on the presence of a vacuum region and on the location of a (geometrically-complicated) conducting wall. Unlike linear codes where one can use Green's functions to predict the response of a fixed plasma-vacuum boundary, the implementation of a vacuum region in a nonlinear initial-value code with a moving plasma-vacuum boundary presents many challenges. We review these challenges and present a practical model for the vaccum region for initial-value codes. We discuss the implementation of this model in the NIMROD code, which was programmed using a finite-element method in order to handle the complicated geometry of modern experiments, and the benchmarking of the NIMROD code to linear analytic results [1] and to the GATO [2] code. Plans to extend this work to nonlinear regimes and to compare with previous nonlinear results [3] will be discussed. ------- [1] V.D. Shafranov, Soviet Physics Technical Physics 15 (1970) 175 [2] L.C. Bernard et.al, Comp. Phys. Comm. 24 (1981) 377 [3] A. Y Aydemir, et al., Bull. Am. Phys. Soc., 43, 1747 (1998).

  8. Etude séro-épidémiologique de la leishmaniose canine au centre du Maroc

    PubMed Central

    Fellah, Hajiba; Doughmi, Oursula; Maniar, Saâd; Lalami, Abdelhakim El Ouali

    2014-01-01

    Dans le monde, la leishmaniose viscérale humaine est connue pour avoir comme principale source d'infection les Canidés domestiques et sauvages. Au centre du Maroc, les données épidémiologiques, cliniques et parasitologiques sur la leishmaniose canine, sont quasiment inexistantes. Ce travail traite une étude prospective au cours de laquelle 61 sérums canins ont été analysés par un test rapide et par l'immunofluorescence indirecte. La sensibilité du test rapide par rapport à celle de l'immunofluorescence indirecte (IFI) est de 33,33%. La fréquence de la maladie chez les chiens s’élève à 9,83% (Test Rapide) et 24,59% (IFI). 73,33% des cas canins positifs à la sérologie sont asymptomatiques. Ce sont les jeunes chiens de moins de 5 ans qui sont les plus fréquemment atteints avec une sensibilité de la race Berger Allmand à l'infection. Cette étude a permis de mettre en évidence la présence de chiens leishmaniens (15 chiens séropositifs parmi 61) et de prouver l'existence du réservoir canin. Une stratégie de prévention active doit être mise en place. PMID:25852791

  9. Resonant-Like Enhancement of the High-Energy Plateau in ATD

    NASA Astrophysics Data System (ADS)

    Krajewska, Katarzyna; Fabrikant, Ilya I.; Starace, Anthony F.

    2006-05-01

    We calculate the intensity variation of above-threshold detachment (ATD) rates for H^- and F^- in the high-energy plateau region, by solving the time-dependent Schr"odinger equation within the Sturmian-Floquet approach [1]. We find pronounced enhancement of the ATD spectra as the laser-field intensity induces ATD channel closings. We confirm previous results on negative ions with an active s-electron [2], and extend them to the case of p-symmetry of the initial state. Depending on the symmetry of the initial state, we show that the enhancement is most pronounced for even- or odd-channel closures. Similar resonant-like enhancements have been observed experimentally in above-threshold ionization spectra for rare gases [3], calculations for which are in progress. [1] R. M. Potvliege, Comp. Phys. Comm. 114, 42 (1998); [2] B. Borca et al., Phys. Rev. Lett. 88, 193001 (2002); [3] See, e.g., F. Grasbon et al., Phys. Rev. Lett. 91, 173003 (2003).

  10. Le syndrome des loges du bras: une complication inhabituelle de l'intoxication au monoxyde de carbone

    PubMed Central

    Chkoura, Khalid; Kechna, Hicham; Loutid, Jaouad; Ouzad, Omar; Cherradi, Toufiq; Hachimi, Moulay Ahmed

    2015-01-01

    Le monoxyde de carbone (CO) surnommé “Silent killer” par les Anglo-Saxons représente la première cause de mortalité par intoxication accidentelle ou volontaire en Europe comme aux États-Unis. Au Maroc, le centre anti poison a collecté entre 1991 et 2008, 12976 cas d'intoxication au monoxyde de carbone dont 98,7% étaient accidentelles. Cette intoxication est très exceptionnellement compliquée d'un syndrome de loge qui peut contribuer à une aggravation certaine du pronostic fonctionnel et vital quand il est ignoré ou dominé par d'autres symptômes en particulier neurologiques. Nous rapportons le cas d'un gardien de nuit qui a présenté un syndrome de loge particulier par sa localisation (bras) au cours d'une intoxication au CO qui a évolué favorablement. PMID:26301009

  11. Fistule artério-veineuse ulno-basilique pour hémodialyse au CHU de Yaoundé: à propos de deux cas

    PubMed Central

    Guifo, Marc Leroy; Kaze, Francois Folefak; Ndoumbe, Aurélien; Halle, Marie Patrice; Bitang, Louis Joss; Pisoh, Christopher Tagnyin; Takongmo, Samuel

    2013-01-01

    La fistule ulno-basilique est une éventualité peu sollicitée dans le choix des abords vasculaires pour hémodialyse. Elle est construite sur la veine basilique qui est souvent la seule veine épargnée par les ponctions veineuses de routine dans les services de médecine. De par l'existence de nombreuses complications comme l'infection des prothèses et des cathéters centraux, les thromboses, les patients hémodialysés chroniques nécessitent plus d'un accès veineux au cours de leur suivi médical. Les fistules artério-veineuses natives présentent moins de risques de complications que les prothèses d'une façon générale et une plus longue durée de vie. La confection d'une fistule sur une topographie proximale compromet le recourt à cette veine sur une localisation distale ultérieurement. Il existe donc une hiérarchisation dont il faut tenir compte pour une utilisation optimale du capital veineux disponible. Nous rapportons ici deux observations concernant des patients chez qui deux fistules ulno-basiliques ont été réalisées avec succès au CHU de Yaoundé. PMID:24244789

  12. Paragangliome retropéritonéal: à propos d'un cas et revue de literature

    PubMed Central

    Fahmi, Yassine; Elabbasi, Tawfik; Khaiz, Driss; Bensardi, Fatima Zahra; Hattabi, Khaled; Berrada, Saad; Lefriyekh, Rachid; Fadil, Abdelaziz; Zerouali, Najib

    2015-01-01

    Les paragangliomes rétropéritonéaux non fonctionnels sont des tumeurs rares. Ils sont définis comme des tumeurs chromaffines extra- surrénaliennes et représentent environ 1/5ème des tumeurs chromaffines. Ils sont souvent asymptomatiques et peuvent atteindre des dimensions importantes. Nous rapportons l'observation d'une patiente âgée de 34 ans opérée pour une tumeur rétropéritonéale géante et dont l'examen anapath a conclu à un paragangliome. Les formes malignes, plus fréquentes que les formes bénignes, présentent un envahissement locorégional et métastasent tardivement. La prise en charge des paragangliomes doit être multidisciplinaire mais seul le traitement chirurgical est curatif. Il n'existe par contre pas de consensus sur l'utilité des thérapeutiques complémentaires qui peuvent néanmoins constituer un appoint à titre symptomatique. Les paragangliomes présentent un caractère génétique dans 25% des cas. Une enquête génétique doit être systématiquement proposée. PMID:26587147

  13. Aspect Epidemiologique des Sequelles de Brulures a Marrakech, Maroc, a Travers Deux Observations

    PubMed Central

    Ettalbi, S.; Ibnouzahir, M.; Droussi, H.; Wahbi, S.; Bahaichar, N.; Boukind, E.H.

    2009-01-01

    Summary La brûlure est un accident qui reste toujours très fréquent au Maroc, ce qui fait d'elle un problème de la santé publique. Les brûlures, quand elles sont graves ou profondes, entraînent de façon quasi inéluctable des séquelles fonctionnelles et esthétiques. A travers deux observations de deux enfants présentant des séquelles de brûlures graves, ayant retenti péjorativement sur leurs scolarités, on a essayé de mettre en évidence quelques facteurs incriminés dans cette tragédie (feu, petites bouteilles de gaz et le manque d'infrastructure, du personnel médical et paramédical, du matériel ainsi que de la prévention) comme étant une grande cause dans la survenue de ces séquelles. Le but de notre travail est d'énumérer ces différents facteurs intriqués, ainsi que de proposer quelques solutions, tout en insistant sur la prévention. PMID:21991156

  14. Coupled cluster algorithms for networks of shared memory parallel processors

    NASA Astrophysics Data System (ADS)

    Bentz, Jonathan L.; Olson, Ryan M.; Gordon, Mark S.; Schmidt, Michael W.; Kendall, Ricky A.

    2007-05-01

    As the popularity of using SMP systems as the building blocks for high performance supercomputers increases, so too increases the need for applications that can utilize the multiple levels of parallelism available in clusters of SMPs. This paper presents a dual-layer distributed algorithm, using both shared-memory and distributed-memory techniques to parallelize a very important algorithm (often called the "gold standard") used in computational chemistry, the single and double excitation coupled cluster method with perturbative triples, i.e. CCSD(T). The algorithm is presented within the framework of the GAMESS [M.W. Schmidt, K.K. Baldridge, J.A. Boatz, S.T. Elbert, M.S. Gordon, J.J. Jensen, S. Koseki, N. Matsunaga, K.A. Nguyen, S. Su, T.L. Windus, M. Dupuis, J.A. Montgomery, General atomic and molecular electronic structure system, J. Comput. Chem. 14 (1993) 1347-1363]. (General Atomic and Molecular Electronic Structure System) program suite and the Distributed Data Interface [M.W. Schmidt, G.D. Fletcher, B.M. Bode, M.S. Gordon, The distributed data interface in GAMESS, Comput. Phys. Comm. 128 (2000) 190]. (DDI), however, the essential features of the algorithm (data distribution, load-balancing and communication overhead) can be applied to more general computational problems. Timing and performance data for our dual-level algorithm is presented on several large-scale clusters of SMPs.

  15. Simulation models for computational plasma physics: Concluding report

    SciTech Connect

    Hewett, D.W.

    1994-03-05

    In this project, the authors enhanced their ability to numerically simulate bounded plasmas that are dominated by low-frequency electric and magnetic fields. They moved towards this goal in several ways; they are now in a position to play significant roles in the modeling of low-frequency electromagnetic plasmas in several new industrial applications. They have significantly increased their facility with the computational methods invented to solve the low frequency limit of Maxwell`s equations (DiPeso, Hewett, accepted, J. Comp. Phys., 1993). This low frequency model is called the Streamlined Darwin Field model (SDF, Hewett, Larson, and Doss, J. Comp. Phys., 1992) has now been implemented in a fully non-neutral SDF code BEAGLE (Larson, Ph.D. dissertation, 1993) and has further extended to the quasi-neutral limit (DiPeso, Hewett, Comp. Phys. Comm., 1993). In addition, they have resurrected the quasi-neutral, zero-electron-inertia model (ZMR) and began the task of incorporating internal boundary conditions into this model that have the flexibility of those in GYMNOS, a magnetostatic code now used in ion source work (Hewett, Chen, ICF Quarterly Report, July--September, 1993). Finally, near the end of this project, they invented a new type of banded matrix solver that can be implemented on a massively parallel computer -- thus opening the door for the use of all their ADI schemes on these new computer architecture`s (Mattor, Williams, Hewett, submitted to Parallel Computing, 1993).

  16. Two-dimensional boron based nanomaterials: electronic, vibrational, Raman, and STM signatures

    NASA Astrophysics Data System (ADS)

    Massote, Daniel V. P.; Liang, Liangbo; Kharche, Neerav; Meunier, Vincent

    Because boron has only three electrons on its outer shell, planar mono-elemental boron nanostructures are expected to be much more challenging to assemble than their carbon counterparts. Several studies proposed schemes in which boron is stabilized to form flat semiconducting sheets consisting of a hexagonal lattice of boron atoms with partial hexagon filling (PRL 99 115501, ACSNano 6 7443-7453) . Other structures were proposed based on results from an evolutionary algorithm (PRL 112 085502). These structures are metallic and one even features a distorted Dirac cone near the Fermi level. Experimental evidence for 2D boron is still lacking but the recently proposed molecular synthesis of a flat all-boron molecule is a promising route to achieve this goal (Nat.Comms. 5 3113). Our research aims at providing a first-principles based description of these materials' properties to help in their identification. DFT is used to calculate phonon dispersion and associated Raman scattering spectra. We report some marked discrepancy between our findings and results from the recent literature and address the deviation using two methods for phonon dispersion. We also simulated STM images at various bias potentials to reveal the electronic symmetry of each material.

  17. Multisite comparison of methods for the quantitation of the surface expression of CD38 on CD8(+) T lymphocytes. The ACTG Advanced Flow Cytometry Focus Group.

    PubMed

    Schmitz, J L; Czerniewski, M A; Edinger, M; Plaeger, S; Gelman, R; Wilkening, C L; Zawadzki, J A; Wormsley, S B

    2000-06-15

    We evaluated the effect of specimen processing variations and quantitation methods on quantitative determination of CD38 expression on CD8 T lymphocytes. Neither lysing reagent (ammonium chloride versus BD FACSlyse), fixation (paraformaldehyde versus no final fixation step), nor acquisition delay (acquisition within 6 h after fixation versus 24 h after fixation) had a significant effect on CD38 relative fluorescent intensity or CD38 quantitative estimates (RFI or antibodies bound per cell). The only significant difference in fluorescent intensity and CD38 antibodies bound per cell (ABC) was encountered when whole blood was held for 24 h prior to staining and fixation and then acquired after another 24-h hold. However, for all sample processing methods above, the CD4 biologic calibrator and QuantiBRITE bead methods gave significantly different estimates of CD38 intensity. In many cases, however, these differences are relatively small and were more pronounced in certain laboratories. We conclude that there is some flexibility in sample processing methods for quantitative CD38 determination; however, it is preferable for a laboratory to employ one method of fluorescence quantitation calculation consistently because small differences are detected between different methods. Cytometry (Comm. Clin. Cytometry) 42:174-179, 2000. PMID:10861690

  18. Magnetic anisotropy of ferrosmectic phases

    NASA Astrophysics Data System (ADS)

    Ponsinet, Virginie; Fabre, Pascale; Veyssié, Madeleine; Cabanel, Régis

    1994-10-01

    A new anisotropic magnetic fluid, called ferrosmectic, is obtained when using a colloidal suspension of submicronic magnetic particles (ferrofluid), as a component in a smectic phase of fluid membranes. These lamellar phases present specific magnetic properties. The anisotropy of their magnetic susceptilities as a function of particles concentration is studied and interpreted : a microscopic mechanism involving a steric hindrance between particles and membranes is used to understand the experimental results. Un nouveau fluide magnétique anisotrope, appelé ferrosmectique, est obtenu lorsque nous utilisons un ferrofluide, c'est-à-dire une suspension colloïdale de particules magnétiques de taille inférieure au micron, comme composant dans la fabrication d'une phase smectique de membranes fluides. Ces phases adoptent des comportements spécifiques sous champ magnétique, et nous présentons ici une étude de l'anisotropie de leur susceptibilité magnétique en fonction de la concentration en particules. Nous interprétons les résultats obtenus par un mécanisme microscopique basé sur l'existence d'une gêne stérique entre membranes et particules.

  19. Mariage consanguin et morbi-mortalité, courte revue de la littérature à partir d'une association exceptionnelle: syndrome de Usher et Neurofibromatose de Von Recklinghausen

    PubMed Central

    Atipo-Tsiba, Pépin-Williams

    2016-01-01

    Le syndrome de Usher est défini par l'association d'une surdité de perception congénitale de sévérité variable évolutive ou non et d'une rétinopathie pigmentaire progressivement cécitante. La Neurofibromatose de Von Recklinghausen ou Neurofibromatose de type I est la principale forme clinique des neurofibromatoses avec environ 90% des cas. Ces deux maladies sont d'origine génétique avec des prévalences très basses. La probabilité pour qu'un seul et même individu souffre à la fois de ces maladies est exceptionnelle. Comme toutes les maladies génétiques, la consanguinité augmente de façon assez sensible la probabilité de leur apparition. Le mariage consanguin est encore largement répondu au Maghreb et dans certaines régions d'Afrique de l'Ouest. Cette observation rapporte un cas exceptionnel de cette association chez un homme de 40 ans originaire de la Mauritanie né d'une union consanguine. PMID:27231508

  20. Etude par spectroscopie de Coulomb de points quantiques lateraux individuels et couples

    NASA Astrophysics Data System (ADS)

    Pioro-Ladriere, Michel

    Des points quantiques contenant un nombre discret et variable d'electrons sont formes dans un gaz bi-dimensionnel d'electrons a l'aide de grilles metalliques. Le transport electrique, le blocage de spin et la detection de charge sont employes comme outils spectroscopiques permettant de sonder les proprietes de ces nanostructures. Ces techniques permettent aussi de controler exactement le nombres d'electrons confines dans des points quantiques individuels et couples en utilisant un patron de grille judicieux. Une technique de refroidissement en tension est developpee afin de minimiser les effets parasites du bruit telegraphique. Ce type de bruit de charge deteriore la stabilite des nanostructures laterales par l'activation d'un minuscule courant de fuite entre les grilles et le gaz bi-dimensionnel. Un modele expliquant le role du refroidissement en tension sur le courant de fuite est presente. L'activation du courant de fuite est confirmee par detection de charge. Les effets des interactions entre les electrons pieges dans un point quantique sont ensuite etudies dans un regime ou il est possible de comparer les resulats experimentaux avec ceux obtenus par diagonalisation exacte. L'etude demontre que la phase associee au facteur de remplissage nu = 2 est instable au-dessus d'un nombre critique d'electrons. Cette instabilite est confirmee experimentalement par blocage de spin. On demontre aussi l'existence d'etats correles dans le regime des renversements de spin, associe au passage de la phase nu = 2 a nu = 1. Les etats correles sont identifies par spectroscopie en transport non lineaire. Cette caracterisation du diagramme de phase de points individuels permet de coupler deux points quantiques configures a nu = 2. Pour ce regime, la nanostructure se comporte comme un systeme a deux niveaux pouvant contenir entre un et quatre electrons de valence et ce, meme si le nombre total d'electrons est plus eleve. Les degres de liberte de charge et de spin des deux points

  1. Rotations et moments angulaires enmécanique quantique

    NASA Astrophysics Data System (ADS)

    van de Wiele, J.

    Rotations and angular moments in quantum mechanics As in classical mechanics, rotation in quantum mechanics is a transformation which deals with angular momentum. The difference with classical mechanics comes from the fact that angular momentum is a vector operator and not a usual vector and its components do not commute. As for any transformation in quantum mechanics, to each rotation we can associate an operator which acts in state space. The expression of this operator depends on whether the rotation is passive, that is we do a rotation of the coordinate axes and the physical system is left unchanged, or active, in which case the coordinate axes are unchanged and the rotation is performed on the physical system. In the first part (Chaps. 1 and 2) of this book, details concerning both aspects are given. Following the definition of the geometrical transformation associated with the most general rotation, we give the expression of the rotation operator for specific cases. Transformation laws for scalar fields, vector fields and spinor fields are given as well as transformation laws for scalar operators, vector operators and more generally, for operators of any rank. The second part (Chaps. 3 and 4) deals with angular momentum algebra. We define the coupling coefficients of 2, 3 and 4 angular momenta as well as the recoupling coefficients. The definition of the irreductible tensor operator, which is a generalisation of scalar and vector operators, is given as well as the Wigner-Eckart theorem. The application of this theorem to more complex cases is studied. Comme en mécanique classique, la rotation en mécanique quantique est une transformation qui fait intervenir le moment cinétique. La différence avec la mécanique classique vient du fait que le moment cinétique est un opérateur vectoriel et non pas un vecteur ordinaire, et que ses composantes ne commutent pas deux-à-deux. Comme pour toute transformation en mécanique quantique, à chaque rotation est

  2. Contractions Graduees D'algebres de Lie et Applications EN Physique

    NASA Astrophysics Data System (ADS)

    de Montigny, Marc

    1992-01-01

    representations finies des groupes de de Sitter, en utilisant des methodes deja connues. Les deux derniers chapitres sont des ecrits originaux qui, contrairement a tous les articles precedents, necessitent des modifications majeures avant d'etre soumis pour publication. Comme ils sont relies au sujet general de cette these, nous avons cru bon de les y inclure. Le premier d'entre eux porte sur une interpretation des geometries de Cayley-Klein en termes des contractions graduees. Ces travaux s'inserent naturellement dans le cadre de cette these puisque les resultats que nous y obtenons contiennent la plupart des groupes cinematiques comme cas particuliers de geometries a quatre dimensions. Pour clore le tout, nous considerons dans le chapitre 8 l'application des contractions traditionnelles aux equations differentielles. Plus precisement, nous nous interessons a la contraction des equations differentielles invariantes sous deux groupes reliees par contraction: so(2,1) (de Sitter en 1 + 1 dimensions) et p(1,1) (Poincare en 1 + 1 dimensions). A notre connaissance, cet article constitue le premier pas dans cette direction. Nous y suggerons une demarche vers une generalisation. La methode originale de contraction graduee present de nombreuses perspectives de recherches, d'interet autant mathematique que physique. Nous en discutons brievement dans le chapitre 9. (Abstract shortened by UMI.).

  3. A consistent magnetic polarity stratigraphy of Plio-Pleistocene fluvial sediments from the Heidelberg Basin (Germany)

    NASA Astrophysics Data System (ADS)

    Scheidt, Stephanie; Hambach, Ulrich; Rolf, Christian

    2014-05-01

    Viernheim and Heidelberg. All things considered, the application of magnetic polarity stratigraphy on Pliocene and Pleistocene fluvial sediments from the Heidelberg Basin provides a consistent and independent chronology and opens the perspective for global correlations where other approaches hardly come to results. [1] GABRIEL, G., ELLWANGER, D., HOSELMANN, C. & WEIDENFELLER, M. 2008. Preface: The HeidelbergBasin Drilling Project. E & G (Quaternary Science Journal), 57, 253-260. [2] ELLWANGER, D. & WIELAND-SCHUSTER, U. 2012. Fotodokumentation und Schichtenverzeichnis der Forschungsbohrungen Heidelberg UniNord I und II. LGRB-Informationen, 26, 25-86. [3] KIRSCHVINK, J. L. 1980. The least-squares line and plane and the analysis of palaeomagnetic data. Geophysical Journal, Royal Astronomical Society, 62, 699-718. [4] ROLF, C., HAMBACH, U. & WEIDENFELLER, M. 2008. Rock and palaeomagnetic evidence for the Plio-/Pleistocene palaeoclimatic change recorded in Upper Rhine Graben sediments (Core Ludwigshafen-Parkinsel), Neth. J. Geosci., 87 (1), 41-50. [5] KNIPPING, M. 2008. Early and Middle Pleistocene pollen assemblages of deep core drillings in the northern Upper Rhine Graben, Germany, Neth. J. Geosci., 87(1), 51-65. [6] HEUMANN, G., pers. Comm. [7] HAHNE, J., pers. Comm.

  4. Etude d'un systeme de trigeneration decentralise en climats canadiens

    NASA Astrophysics Data System (ADS)

    Allaire Tanguay, Dominique

    Ce mémoire présente l'étude d'un système de trigénération ou CCHP (combined cooling, heating and power) au gaz naturel fournissant les besoins thermiques à un immeuble à logement typique de 13 étages. Un groupe électrogène permettant de générer de l'électricité tout en fournissant de l'eau chaude assure le chauffage du bâtiment et de l'eau chaude sanitaire tandis qu'une machine à absorption ammoniac-eau permet de transformer cette chaleur en puissance frigorifique afin de climatiser le bâtiment en période chaude. Le modèle de cette machine à absorption a spécialement été conçu pour fonctionner avec une température de désorption basse et permet d'évaluer les performances de telles machines dans des situations hors design. Ce modèle à été vérifié à l'aide d'autres modèles avérés et propose des coefficients de performance de l'ordre de 0,7 à 0,8. L'évaluation des performances horaires de ce système est présentée pour une année standard sous trois climats canadiens. Ces performances sont ensuite comparées aux différentes méthodes employées pour assurer ces besoins ainsi que pour générer l'électricité supplémentaire. Les résultats démontrent d'excellentes performances même lorsque comparées aux plus récentes technologies. Les résultats passent d'une légère augmentation de la consommation de gaz naturel dans un climat chaud comme Toronto à une importante réduction dans un climat froid comme Edmonton. Ce système permet donc de combler les besoins thermiques d'un bâtiment tout en générant de l'électricité dans des périodes de pointes annuelles et possiblement journalières. Plusieurs études dont notamment l'optimisation du système et le couplage à d'autres types de bâtiment permettrait cependant de mieux évaluer les possibilités complètes de la trigénération. Mots-clés : Trigénération, CCHP, Absorption, Ammoniac-eau, cogénération.

  5. Hydrochemistry of waters from five cenotes and evaluation of their suitability for drinking-water supplies, northeastern Yucatan, Mexico

    NASA Astrophysics Data System (ADS)

    Alcocer, Javier; Lugo, Alfonso; Marín, Luis E.; Escobar, Elva

    Waters from five cenotes that are currently being used for aquatic recreational activities and that lie along the Cancun-Tulum touristic corridor, Mexico, were evaluated hydrochemically to determine whether the cenotes may be considered as potential drinking-water sources. Several parameters exceed the Mexican Drinking Water Standards (MDWS), but since they do not pose a significant health threat, four of the five cenotes may be used as drinking-water sources. The common contaminants in the Yucatan Peninsula, fecal coliforms and nitrate, are in most cases below the MDWS (0-460 MPN/100ml and 0.31-1.18mg/L, respectively). Although these four cenotes meet the MDWS, a careful groundwater management policy needs to be developed to avoid contamination (fecal and nitrates) and salt-water intrusion. Résumé Les eaux de cinq cénotés, qui sont normalement utilisées pour des activités de plein air, dans la région touristique de Cancun-Tulum (Mexique), ont été soumises à analyses chimiques pour savoir si les cénotés peuvent être considérés comme des sources d'eau potable. Plusieurs paramètres dépassent les normes mexicaines en matière d'eau potable; mais comme ceux-ci ne posent pas de problème réel de santé, quatre des cinq cénotés peuvent être captés pour l'eau potable. Les contaminants habituels dans les eaux de la presqu'île du Yucatan, coliformes fécaux et concentrations élevées en nitrate, sont la plupart du temps au-dessous des normes (respectivement 0 à 460 germes/100ml et 0,31 à 1,18mg/l). Bien que ces quatre cénotés satisfassent aux normes, il est nécessaire de mettre en place des règles précises de l'utilisation de l'eau souterraine, afin d'éviter la contamination par les germes fécaux et par les nitrates, ainsi que l'intrusion marine. Resumen Se analizó hidroquímica y bacteriológicamente el agua de algunos cenotes localizados a lo largo del corredor turístico Cancun-Tulum, que actualmente se utilizan para diversas actividades

  6. Les facteurs pronostiques de survie sans récidive chez les patientes atteintes de tumeur du col de l'utérus

    PubMed Central

    Dossou, Serpos; James, Laurianne; Bakkali, Hanae; Afif, Mohammed; Rahali, Leila; Irigo, Joelle; Ogandaga, Etienne; Kebdani, Tayeb; Ahid, Samir; Benjaafar, Noureddine

    2015-01-01

    La radiochimiothérapie est le traitement de référence des tumeurs du col localement avancées, et plusieurs études ont montré l'importance des facteurs pronostiques sur le contrôle local de la tumeur et la survie des malades. L'objectif de cette étude est d'évaluer l'impact des facteurs pronostiques, en particulier de l'étalement sur la survie sans récidive des patientes suivies pour cancer du col utérin. Il s'agit d'une série rétrospective portant sur 177 femmes suivies en 2011 pour tumeur du col utérin de stade IB à III selon la classification de FIGO 2009 ayant bénéficié d'une radiothérapie à la dose de 46 Grays sur le pelvis et une surimpression sur les paramètres envahis associée à du cisplatine 40mg/m2 par semaine suivie de curiethérapie réalisée selon le mode haut débit de dose (HDR) ou bas débit de dose (LDR). La moyenne d'âge était de 53ans, la médiane de l'étalement total était de 65 jours, 75% des patientes ont reçu 4 cures de chimiothérapie, et les patientes ont été suivies après le traitement pendant une durée médiane de 34 mois. La récidive locale et métastatique était de 33,3% chez les patientes ayant des adénopathies pelviennes, contre 16,3% chez celles qui en étaient indemnes (p= 0,031), elle était de 26,3% chez les patientes ayant un étalement supérieur à 65 jours contre 11% chez celles dont l'étalement en était inférieur (p= 0,01). La présence d'adénopathies pelviennes et l'étalement total de la radiothérapie apparaissaient respectivement comme les seuls facteurs pronostiques indépendant de survenue de récidive, p= 0,04 OR= 2,6 IC95% (1,05 6,3) et p= 0,01 OR= 2,9 IC95% (1,26 6,7). En analyse multivariée, la technique de curiethérapie p = 0,003 OR= 0,25 IC95% (0,1 0,6) et l'étalement total du traitement p= 0,0001 OR= 4,7 IC95% (2 10,8) apparaissaient comme les seuls facteurs pronostiques indépendant de survie sans récidive. L'étalement supérieur à 65 jours et la technique de curieth

  7. An overview about the pre-earthquake signals observed in relation to Tohoku M9 EQ and the current status of EQ prediction study in Japan

    NASA Astrophysics Data System (ADS)

    Nagao, T.

    2012-12-01

    On 11 March 2011, M:9.0 Tohoku EQ, with a huge tsunami, occurred resulting in a devastation of the Pacific side of entire northeastern Japan. As of now, this EQ disaster turned into nuclear hazard raised by the Fukushima #1 nuclear power plant. Now "Fukushima" becomes very famous Japanese word like "Hiroshima". In the presentation, the author would like to summarize seismic, geodetic and electromagnetic pre-earthquake changes except ionospheric phenomena such as OLR and GPS-TEC anomalies. Seismic and geodetic anomalies: Concerning seismicity, many authors present seismic quiescence. Katasumata (2011, EPS, 63, 709-712) claimed more than 20 years seismic quiescence by using the JMA seismic catalog since 1965. The Institute of Statistical Mathematics also claimed notable seismic quiescence all over the Japanese island 15 years ago. Furthermore, the author's group applied the weighted coefficient method in time, space and magnitude, called the RTM method (Nagao et al, 2011, EPS, 63, 315-324). The RTM method also showed clear seismicity change almost two years before the EQ. Concerning b-value of the GR law, it many researchers stated that the b-value of the foreshock activity was very small (0.4). Tanaka (2012, GRL, 39, L00G26, doi:10.1029/2012GL051179) reported that strong long-term statistical correlations between tidally-induced stresses and earthquake occurrence times. The author considers this phenomenon was one of the most notable pre-earthquake changes before the EQ. Kato (2012, Science, 335, 705-708, doi: 10.1126/science.1215141) identified two distinct sequences of foreshocks migrating at rates of 2 to 10 kilometers per day along the trench axis toward the epicenter. According to the GPS base-line observations, GSI reported that non-steady state changes were started around 2003 in Tohoku region. Furthermore, large back-slip is also recognized around the epicentral area since 2007. Electromagnetic anomalies According to Hase (pers. comm.), after correction of

  8. Modelisation de la diffusion sur les surfaces metalliques: De l'adatome aux processus de croissance

    NASA Astrophysics Data System (ADS)

    Boisvert, Ghyslain

    Cette these est consacree a l'etude des processus de diffusion en surface dans le but ultime de comprendre, et de modeliser, la croissance d'une couche mince. L'importance de bien mai triser la croissance est primordiale compte tenu de son role dans la miniaturisation des circuits electroniques. Nous etudions ici les surface des metaux nobles et de ceux de la fin de la serie de transition. Dans un premier temps, nous nous interessons a la diffusion d'un simple adatome sur une surface metallique. Nous avons, entre autres, mis en evidence l'apparition d'une correlation entre evenements successifs lorsque la temperature est comparable a la barriere de diffusion, i.e., la diffusion ne peut pas etre associee a une marche aleatoire. Nous proposons un modele phenomenologique simple qui reproduit bien les resultats des simulations. Ces calculs nous ont aussi permis de montrer que la diffusion obeit a la loi de Meyer-Neldel. Cette loi stipule que, pour un processus active, le prefacteur augmente exponentiellement avec la barriere. En plus, ce travail permet de clarifier l'origine physique de cette loi. En comparant les resultats dynamiques aux resultats statiques, on se rend compte que la barriere extraite des calculs dynamiques est essentiellement la meme que celle obtenue par une approche statique, beaucoup plus simple. On peut donc obtenir cette barriere a l'aide de methodes plus precises, i.e., ab initio, comme la theorie de la fonctionnelle de la densite, qui sont aussi malheureusement beaucoup plus lourdes. C'est ce que nous avons fait pour plusieurs systemes metalliques. Nos resultats avec cette derniere approche se comparent tres bien aux resultats experimentaux. Nous nous sommes attardes plus longuement a la surface (111) du platine. Cette surface regorge de particularites interessantes, comme la forme d'equilibre non-hexagonale des i lots et deux sites d'adsorption differents pour l'adatome. De plus, des calculs ab initio precedents n'ont pas reussi a confirmer la

  9. ISICS2008: An expanded version of ISICS for calculating K-, L-, and M-shell cross sections from PWBA and ECPSSR theory

    NASA Astrophysics Data System (ADS)

    Cipolla, Sam J.

    2009-09-01

    New version program summaryProgram title: ISICS2008 Catalogue identifier: ADDS_v4_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADDS_v4_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.html No. of lines in distributed program, including test data, etc.: 5420 No. of bytes in distributed program, including test data, etc.: 107 669 Distribution format: tar.gz Programming language: C Computer: 80 486 or higher level PCs Operating system: Windows XP and all earlier operating systems Classification: 16.7 Catalogue identifier of previous version: ADDS_v3_0 Journal reference of previous version: Comput. Phys. Comm. 179 (2008) 616 Does the new version supersede the previous version?: Yes Nature of problem: Ionization and X-ray production cross section calculations for ion-atom collisions. Solution method: Numerical integration of form factor using a logarithmic transform and Gaussian quadrature, plus exact integration limits. Reasons for new version: Addition of relativistic treatment of both projectile and K-shell electrons. Summary of revisions: A new addition to ISICS is the option (R) to calculate ECPSSR cross sections that account for the relativistic treatment of both projectile and K-shell electron, as proposed recently by Lapicki [1], accordingly as σKRECPSSR=Cṡ(1+0.07(()ṡσ(√{(mKRυ1R)}/Z,ςθ), where υ1R is the relativistic projectile velocity. The option can also be invoked in calculating ECPSShsR, where hsR stands for the Hartree-Slater description of the K-shell electron, which was already incorporated into ISICS2006 [2,3], and is now expressed in this option as, σKRECPSShsR=CṡhsR((2υ1R)/(Zςθ),Z/137)ṡ(1+0.07(()ṡσ(υ1R/Z,ςθ) using the function hsR that is already incorporated into ISICS2006. It should be noted that these expressions are corrected versions [4] from the ones published in Ref. [1]. In this

  10. Influence du comportement des accompagnants sur le vécu des patients admis pour hémorragies digestives hautes au CHU campus de Lomé (Togo)

    PubMed Central

    Bagny, Aklesso; Dusabe, Angelique; Bouglouga, Oumboma; Lawson-ananisoh, Mawuli Late; Kaaga, Yeba Laconi; Djibril, Mohaman Awalou; Soedje, Kokou Mensah; Dassa, Simliwa Kolou; Redah, Datouda

    2014-01-01

    Introduction L'hémorragie digestive haute est une urgence, qui constitue souvent pour les patients un danger mortel suscitant inquiétude et agitation. Dans cet état, le patient dépend de ses accompagnants pour ses soins et pour honorer le traitement; mais souvent, il a été observé une discordance entre l'urgence et les comportements des accompagnants. Le but de cette étude était de décrire les facteurs socioéconomiques et psychologiques pouvant influencer les comportements des accompagnants des patients admis pour HDH, estimer l'indice de relation entre ces comportements et les facteurs associés d'une part et le vécu des patients admis pour HDH d'autre part. Méthodes Il s'agit d'une étude prospective menée de Septembre 2010 à Juin 2011 (soit 10 mois). Nous avions utilisé l'entretien semi-dirigé et l'observation directe pour collecter nos données, ces dernières avaient été traitées par les méthodes statistiques et d'analyse de contenu. Résultats Dans la présente étude, les comportements des accompagnants des patients admis pour HDH sont en majorité marqués par l'abandon (84%) et le manque de sollicitude (80,2%). Ces comportements sont souvent stimulés par les facteurs socioéconomiques tels que les difficultés économiques (83,2%), des conflits intrafamiliaux (85,1%) et des représentations (maladie incurable ou envoûtement) de la maladie par les accompagnants (73,3%) des cas. Quant aux patients, ils vivent ces comportements comme étant des menaces de mort ou des rejets (77,20%) et comme étant une dévalorisation ou une humiliation de la part de leurs accompagnants (70,30%). Les résultats confirment l'existence de lien significatif entre les comportements des accompagnants et les facteurs socio économiques, entre les comportements des accompagnants et des facteurs psychologiques, et entre le vécu des patients admis pour l'HDH et les comportements des accompagnants. Conclusion Des études ultérieures devraient aborder les points

  11. Connaissances, attitudes et pratiques de la population de l'aire de santé SAMBWA en rapport avec le traitement de l'onchocercose à l'ivermectine sous directives communautaires

    PubMed Central

    Philippe, Cilundika Mulenga; Bienvenu, Yogolelo Asani; Francoise, Malonga Kaj; Eric, Mukomena Sompwe; Abdon, Mukalay wa Mukalay; Luboya, Oscar Numbi

    2014-01-01

    Introduction L'onchocercose constitue un problème majeur de santé publique et l'on a noté environ 13 millions de personnes affectées et 26 millions exposées au cours de l'année 2012 en RDC. L'objectif de notre étude est fournir les données sur le niveau de connaissance, d'attitudes et des pratiques de la communauté huit ans après le lancement de la distribution de l'ivermectine sous directives communautaires. Méthodes Il s'agit d'une étude descriptive transversale dans la communauté de l'aire de santé SAMBWA de la zone de santé de KAFUBU. La population cible de l’étude est toute personne de la communauté âgée de 15 à 65 ans. Les paramètres étudiés sont: âge, niveau d'instruction, connaissance de la maladie en langue locale et des signes, attitudes devant les personnes atteintes, perception de la maladie, utilisation des pratiques traditionnelles, association entre le niveau d'instruction et la connaissance de savoir si l'on peut suivre un traitement. Résultats La moyenne d’âge des répondants était de 38±14 ans et 67,54% des enquêtés étaient de niveau primaire. L’étude a montré que 99,53% des répondants connaissaient le terme onchocercose en langue locale (UBUMFUKU) et un niveau moyen de connaissance en ce qui concerne les lésions de la peau (66,9%) était noté. 1,9% des répondants craignaient les personnes atteintes et 42,2% des répondants percevaient l'onchocercose comme une maladie. Une proportion de 55% qui prenaient les plantes comme médicament. Il y avait association significative entre le niveau d'instruction et la connaissance de suivre un traitement contre l'onchocercose (p: 0,008). Conclusion Ces résultats interpellent en ce qui concerne la sensibilisation de la communauté sur l'onchocercose. Les stratégies de lutte contre l'onchocercose devraient prendre en compte ces différentes insuffisances de la communauté pour améliorer le traitement des masses par l'ivermectine tant au niveau du ménage que des

  12. Statistical mechanics and visual signal processing

    NASA Astrophysics Data System (ADS)

    Potters, Marc; Bialek, William

    1994-11-01

    We show how to use the language of statistical field theory to address and solve problems in which one must estimate some aspect of the environnent from the data in an array of sensors. In the field theory formulation the optimal estimator can be written as an expectation value in an ensemble where the input data act as external field. Problems at low signal-to-noise ratio can be solved in perturbation theory, while high signal-to-noise ratios are treated with a saddle-point approximation. These ideas are illustrated in detail by an example of visual motion estimation which is chosen to model a problem solved by the fly's brain. The optimal estimator bas a rich structure, adapting to various parameters of the environnent such as the mean-square contrast and the corrélation time of contrast fluctuations. This structure is in qualitative accord with existing measurements on motion sensitive neurons in the fly's brain, and the adaptive properties of the optimal estimator may help resolve conficts among different interpretations of these data. Finally we propose some crucial direct tests of the adaptive behavior. Nous montrons comment employer le langage de la théorie statistique des champs pour poser et résoudre des problèmes où l'on doit estimer une caractéristique de l'environnement à l'aide de données provenant d'un ensemble de détecteurs. Dans ce formalisme, l'estimateur optimal peut être écrit comme la valeur moyenne d'un opérateur, l'ensemble des données d'entrée agissant comme un champ externe. Les problèmes à faible rapport signal-bruit sont résolus par la théorie des perturbations. La méthode du col est employée pour ceux à haut rapport signal-bruit. Ces idées sont illustrées en détails sur un modèle d'estimation visuelle du mouvement basé sur un problème résolu par la mouche. L'estimateur optimal a une structure très riche, s'adaptant à divers paramètres de l'environnement tels la variance du contraste et le temps de corr

  13. DPEMC: A Monte Carlo for double diffraction

    NASA Astrophysics Data System (ADS)

    Boonekamp, M.; Kúcs, T.

    2005-05-01

    We extend the POMWIG Monte Carlo generator developed by B. Cox and J. Forshaw, to include new models of central production through inclusive and exclusive double Pomeron exchange in proton-proton collisions. Double photon exchange processes are described as well, both in proton-proton and heavy-ion collisions. In all contexts, various models have been implemented, allowing for comparisons and uncertainty evaluation and enabling detailed experimental simulations. Program summaryTitle of the program:DPEMC, version 2.4 Catalogue identifier: ADVF Program summary URL:http://cpc.cs.qub.ac.uk/summaries/ADVF Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland Computer: any computer with the FORTRAN 77 compiler under the UNIX or Linux operating systems Operating system: UNIX; Linux Programming language used: FORTRAN 77 High speed storage required:<25 MB No. of lines in distributed program, including test data, etc.: 71 399 No. of bytes in distributed program, including test data, etc.: 639 950 Distribution format: tar.gz Nature of the physical problem: Proton diffraction at hadron colliders can manifest itself in many forms, and a variety of models exist that attempt to describe it [A. Bialas, P.V. Landshoff, Phys. Lett. B 256 (1991) 540; A. Bialas, W. Szeremeta, Phys. Lett. B 296 (1992) 191; A. Bialas, R.A. Janik, Z. Phys. C 62 (1994) 487; M. Boonekamp, R. Peschanski, C. Royon, Phys. Rev. Lett. 87 (2001) 251806; Nucl. Phys. B 669 (2003) 277; R. Enberg, G. Ingelman, A. Kissavos, N. Timneanu, Phys. Rev. Lett. 89 (2002) 081801; R. Enberg, G. Ingelman, L. Motyka, Phys. Lett. B 524 (2002) 273; R. Enberg, G. Ingelman, N. Timneanu, Phys. Rev. D 67 (2003) 011301; B. Cox, J. Forshaw, Comput. Phys. Comm. 144 (2002) 104; B. Cox, J. Forshaw, B. Heinemann, Phys. Lett. B 540 (2002) 26; V. Khoze, A. Martin, M. Ryskin, Phys. Lett. B 401 (1997) 330; Eur. Phys. J. C 14 (2000) 525; Eur. Phys. J. C 19 (2001) 477; Erratum, Eur. Phys. J. C 20 (2001) 599; Eur

  14. DSM Accuracy Evaluation for the ISPRS Commission I Image Matching Benchmark

    NASA Astrophysics Data System (ADS)

    Kuschk, G.; d'Angelo, P.; Qin, R.; Poli, D.; Reinartz, P.; Cremers, D.

    2014-11-01

    To improve the quality of algorithms for automatic generation of Digital Surface Models (DSM) from optical stereo data in the remote sensing community, the Working Group 4 of Commission I: Geometric and Radiometric Modeling of Optical Airborne and Spaceborne Sensors provides on its website comm1/wg4/benchmark-test.html"target="_blank">http://www2.isprs.org/commissions/comm1/wg4/benchmark-test.html a benchmark dataset for measuring and comparing the accuracy of dense stereo algorithms. The data provided consists of several optical spaceborne stereo images together with ground truth data produced by aerial laser scanning. In this paper we present our latest work on this benchmark, based upon previous work. As a first point, we noticed that providing the abovementioned test data as geo-referenced satellite images together with their corresponding RPC camera model seems too high a burden for being used widely by other researchers, as a considerable effort still has to be made to integrate the test datas camera model into the researchers local stereo reconstruction framework. To bypass this problem, we now also provide additional rectified input images, which enable stereo algorithms to work out of the box without the need for implementing special camera models. Care was taken to minimize the errors resulting from the rectification transformation and the involved image resampling. We further improved the robustness of the evaluation method against errors in the orientation of the satellite images (with respect to the LiDAR ground truth). To this end we implemented a point cloud alignment of the DSM and the LiDAR reference points using an Iterative Closest Point (ICP) algorithm and an estimation of the best fitting transformation. This way, we concentrate on the errors from the stereo reconstruction and make sure that the result is not biased by errors in the absolute orientation of the satellite images. The evaluation of

  15. Modèle mathématique pour l'étude des équilibres physico-chimiques de permanentes.

    PubMed

    Chiodi, F

    1989-12-01

    Résumé La plupart des permanentes du commerce sont constituées d'acide thioglycolique (éventuellement associéà l'acide thiolactique), neutralisé par l'ammoniac, elles sont additionnées de carbonate d'ammonium comme tampon. Le système peut etre traité comme la neutralisation d'un mélange d'acides thioglycolique et carbonique par l'ammoniac, et il est complètement défini par trois paramètres, trois concentrations, ou deux concentrations et le pH, ou trois paramètres analytiques indépendants. Les calculs théoriques de l'équilibre sont compliqués du fait qu'il s'agit de l'équilibre de deux diacides faibles neutralisés par une base faible. Un modèle mathématique développé exclusivement par des équations théoriques permet l'interprétation des équilibres et la réalisation des calculs fiable pour la préparation des formules remplissant certaines caractéristiques. Le modèle permet de réaliser facilement des simulations en faisant varier les concentrations, les acides (par la voie des constantes de dissociation) ou d'associer différents acids et/ou bases organiques ou minérales. Une application complémentaire du modèle est de tracer la courbe dérivée à la courbe de neutralisation et de cette façon mesurer l'effet tampon en différents points par la mesure de sa pente. Synopsis Mathematical model for the study of physico-chemical equilibria in permanent wave solutions Most waving lotions on the market are prepared with thioglycolic acid (eventually associated with thiolactic acid) neutralized with ammonium hydroxide and buffered with ammonium bicarbonate. The system can be treated as the neutralization of a mix of carbonic acid and thioglycolic acid by ammonia and it is completely defined by three parameters: three concentrations; or two concentrations and pH; or three independent analytical parameters. Theoretical calculations of the equilibrium are difficult because the equilibrium involves at least two weak acids with a weak base

  16. Commande optimale à flux libre des machines asynchrones

    NASA Astrophysics Data System (ADS)

    Biedinger, J. M.; Poullain, S.; Yvon, J. P.

    1992-01-01

    The subject of this paper is the optimal control with unconstrained flux of an induction motor being considered as a distributed parameter system described by a nonlinear diffusion equation. This approach allows to describe the electrodynamic state of the motor by taking into account, in a natural way, the influence of saturation and eddy-currents, as well as the nonlinearities due to the variable flux operation. Equations are approximated via a finite element formulation which leads to a finite dimensional dynamical system to which the techniques of optimal control may be applied. The generality of the methodology allows to treat various criteria. The objective aimed in this paper is to force the motor torque to follow a given input, especially under initially demagnetized conditions and with, naturally, constraints on the currents. For this purpose the criterion will be chosen as a norm of the difference between the electromagnetic torque and a given reference torque. Numerical simulations are presented for the case of a squirrel-cage rotor and for a solid iron rotor. Results are compared with those deduced from strategies based on lumped-parameter models. Torque responses obtained with field-oriented control method adapted to the case of flux-variable operation are also presented. Finally a modification of the criterion is proposed for identifying the command which allows to obtain the larger torque during transient states. Dans cet article on traite le problème du contrôle optimal à flux libre d'un moteur asynchrone considéré comme un système à paramètres répartis gouverné par une équation de diffusion non linéaire. Cette approche permet de décrire l'état électrodynamique de la machine en prenant naturellement en compte les effets de la saturation et des courants induits, ainsi que les non-linéarités liées au fonctionnement à flux variable. La formulation éléments finis est utilisée pour traduire le problème continu sous la forme d

  17. Etude du processus de changement vecu par des familles ayant decide d'adopter volontairement des comportements d'attenuation des changements climatiques

    NASA Astrophysics Data System (ADS)

    Leger, Michel T.

    recension des ecrits sur le changement de comportement en environnement. Nous explorons egalement la famille comme systeme fonctionnel de sorte a mieux comprendre ce contexte d'action environnementale qui est, a notre connaissance, peu etudie. Dans le deuxieme article, nous presentons nos resultats de recherche concernant les facteurs d'influence observes ainsi que les competences manifestees au cours du processus d'adoption de nouveaux comportements environnementaux dans trois familles. Enfin, le troisieme article presente les resultats du cas d'une quatrieme famille ou les membres vivent depuis longtemps des modes de vie ecologique. Dans le cadre d'une demarche d'analyse par theorisation ancree, l'etude de ce cas modele nous a permis d'approfondir les categories conceptuelles identifiees dans le deuxieme article de sorte a produire une modelisation de l'integration de comportements environnementaux dans le contexte de la famille. Les conclusions degagees grace a la recension des ecrits nous ont permis d'identifier les elements qui pourraient influencer l'adoption de comportements environnementaux dans des familles. La recension a aussi permis une meilleure comprehension des divers facteurs qui peuvent affecter l'adoption de comportements environnementaux et, enfin, elle a permis de mieux cerner le phenomene de changement de comportement dans le contexte de la famille consideree comme un systeme. En appliquant un processus d'analyse inductif, a partir de nos donnees qualitatives, les resultats de notre etude multi-cas nous ont indique que deux construits conceptuels semblent influencer l'adoption de comportements environnementaux en famille : 1) les valeurs biospheriques communes au sein de la famille et 2) les competences collectivement mises a profit collectivement durant l'essai de nouveaux comportements environnementaux. Notre modelisation du processus de changement dans des familles indique aussi qu'une dynamique familiale collaborative et la presence d'un groupe de

  18. Caractérisation spectrale et temporelle de l'émission X issue de l'interaction laser-agrégats

    NASA Astrophysics Data System (ADS)

    Bonté, C.; Fourment, C.; Harmand, M.; Jouin, H.; Micheau, S.; Peyrusse, O.; Pons, B.; Santos, J. J.

    2006-12-01

    Les agrégats de gaz rares constituent un état de la matière intermédiaire entre les cibles solides massives et les atomes en phase gazeuse. Il a été démontré que les agrégats irradiés sont sources d'ions, d'électrons, de neutrons ainsi que de rayonnement allant du visible aux X durs. Cette source peut-être produite avec un taux de répétition élevé et a l'avantage de ne pas produire de débris, dommageables pour les optiques notamment, et de présenter une très forte conversion de l'énergie laser incidente. Nous nous intéressons au rayonnement X particulièrement, en le caractérisant en intensité, spectre et durée, comme préalable à toute application de cette source X et comme moyen privilégié d'étude de la physique des plasmas nanométriques chauds et denses. En collaboration avec l'INRS-Énergie (Varenne, Qc, Canada), nous avons mis en œuvre une caméra à balayage de fente dont la résolution temporelle est de 800 fs rms. En focalisant des impulsions laser courtes (30 fs 5 ps) et intenses (jusqu'à 1017 W/cm2) sur des agrégats d'argon dont le rayon varie de 15 à 30 nm, nous avons démontré que l'émission X dont l'énergie est supérieure à 2 keV est plus courte que 2 ps, limité par la résolution temporelle. En couplant la caméra à un cristal tronconique, dont la conception a été réalisée au LULI (Palaiseau, France), nous nous sommes intéressés au rayonnement de couche K dans la gamme 2,9 - 3,2 keV. Nous avons démontré que ce rayonnement a une durée inférieure à 3 ps (limite de la résolution temporelle), et que les raies étaient émises avec un écart relatif inférieur à 1 ps. Une simulation basée sur le modèle nano-plasma proposé par T. Ditmire et sur le code collisionnel-radiatif Transpec a été développée au CELIA. Les spectres X résolus en temps calculés reproduisent à la fois la brièveté d'émission du rayonnement X et les états de charge élevés observés.

  19. Réactivité du laitier de hauts fourneaux d'Annaba (Algérie) en substitution partielle du ciment

    NASA Astrophysics Data System (ADS)

    Behim, M.; Redjel, B.; Jauberthie, R.

    2002-07-01

    Iron industry provides blast-furnace slag production as waste. Blast-furnace slag are made of non ironic elements, flux and coke ash. These elements might have binding properties such as cement. Usually, only blastfurnace slag chemical composition is considered to evaluate its quality as a binder. Other properties such as crystal phases amount, grading, specific area or temperature are not considered Some studies have shown that binding properties exist when the blast-furnace slag is quenched and crushed in very fine grains, and that an increase of the temperature has a benefit aspect on the kinetic of the reaction. We have used X ray diffraction, SEM observations with micro analysis on different samples of blast-furnace slag that undergone different cure modes. At low temperature, only non complete crystal phases appear. At room temperature, calcium sulphate and hydrated aluminium sulphate (ettringite) exist such as for Portland cement while setting. Under a steam curing mode, there is very few lime in the blast-furnace slag because lime has reacted with silicate, therefore there is much more CSH in the binder. No ettringite can be detected, on the other hand, the steam curing mode produce formation of hydrated calcium aluminate. Les laitiers de haut fourneau sont des sous produit de l'élaboration de la fonte. lis sont formés de constituants non ferreux, des fondants et des cendres de coke. Leur composition chimique laisse présager des propriétés liantes comme celles que l'on obtient avec les ciments. Les qualités hydrauliques de ces matériaux sont actuellement estimées par des calculs basés sur leur composition chimique. Elles ne tiennent pas compte d'autres paramètres tels que le caractère vitreux ou cristallin, la granulométrie ou la surface spécifique, la température entre autres. Les propriétés liantes apparaissent lorsque le laitier est trempé et broyé très finement, la température augmentant la cinétique. Les produits formés analys

  20. NMR and molecular modeling: application to wine ageing

    NASA Astrophysics Data System (ADS)

    Saucier, C.; Pianet, I.; Laguerre, M.; Glories, Y.

    1998-02-01

    Red wine contains polyphenols called tannins which are very important for its taste and longevity. These polymers consist in repeating units of catechin and its epimer epicatechin. During ageing, slow condensation reactions take place which lead to new chemical structures. Among the possible reactions, we have focused our attention on acetaldehyde cross-linking. Catechin was used as a model for the production of polymers with acetaldehyde. Two reaction product fractions have been isolated by liquid chromatography. Mass measurement indicated that these fractions contain dimers. NMR (1D and 2D) and molecular modelling were then used to study the structure and conformations of these products. The first product consist in a pure dimer with the two catechin moieties connected with an ethyl bridge on the carbon 6 and 8. The second fraction was a mixture of two dimers (50/50). NMR measurements showed that it could be two symmetrical dimers involving the same carbon for each catechin moiety (6 or8). Le vin rouge contient des polyphénols appelés tanins qui sont très importants pour son goût et sa longévité. Il s'agit principalement de polymères de catéchine et d'épicatéchine. Durant le vieillissement du vin, des réactions de condensation interviennent lentement et conduisent à de nouvelles structures. Parmi les réactions possibles, nous avons plus spécialement étudié la polymérisation par pontage avec l'éthanal. La catéchine a été utilisée comme modèle de tannin et mise en présence d'éthanal en milieu acide proche du vin. Deux fractions de produits de réaction ont été isolées par chromatographie liquide. La spectrométrie de masse a révélé la présence de dimères. La RMN (1D et 2D) et la modélisation moléculaire ont ensuite été utilisées pour déterminer la structure et la conformation de ces produits. La première fraction a été identifiée comme étant un dimère de deux unités catéchines reliées par un pont éthyle par leur

  1. Development and Use of Integrated Microarray-Based Genomic Technologies for Assessing Microbial Community Composition and Dynamics

    SciTech Connect

    J. Zhou; S.-K. Rhee; C. Schadt; T. Gentry; Z. He; X. Li; X. Liu; J. Liebich; S.C. Chong; L. Wu

    2004-03-17

    different microbial communities and processes at the NABIR-FRC in Oak Ridge, TN. One project involves the monitoring of the development and dynamics of the microbial community of a fluidized bed reactor (FBR) used for reducing nitrate and the other project monitors microbial community responses to stimulation of uranium reducing populations via ethanol donor additions in situ and in a model system. Additionally, we are developing novel strategies for increasing microarray hybridization sensitivity. Finally, great improvements to our methods of probe design were made by the development of a new computer program, CommOligo. CommOligo designs unique and group-specific oligo probes for whole-genomes, metagenomes, and groups of environmental sequences and uses a new global alignment algorithm to design single or multiple probes for each gene or group. We are now using this program to design a more comprehensive functional gene array for environmental studies. Overall, our results indicate that the 50mer-based microarray technology has potential as a specific and quantitative tool to reveal the composition of microbial communities and their dynamics important to processes within contaminated environments.

  2. Phoebe and the Icy Saturnian Satellites: Implications for Satellite Origins

    NASA Astrophysics Data System (ADS)

    Mosqueira, I.; Estrada, P. R.

    2004-11-01

    , the gas-poor planetesimal-capture model of Estrada and Mosqueira (2003, 2004, this conference) has them forming from the impact ejecta (which presumably avoided re-accretion by gas drag inward migration) between Titan and a Triton-sized differentiated interloper, leading to Titan's eccentricity and likely causing it to differentiate (assuming it was not differentiated to begin with). In either case, these satellites may not be representative of the bulk composition of regular satellites. Furthermore, Titan's higher density and possible size-selective devolatilization (Stevenson et al. 1986) may also cloud the link between origin and composition. However, we argue that Iapetus would not have been affected by these processes, and so it may furnish a more direct test of whether the regular satellites of Saturn could have derived the bulk of their material directly from heliocentric orbit. At the time of submission, Iapetus' mass GM = 118 ± 11 km3/s2 (though a systematic source of error hasn't been ruled out; Jacobson, pers. comm.) and mean radius of 718 ± 8 km (Dermott and Thomas 1988) yields a density of 1.14 ± 0.1 g/cm3, which implies processing of planetesimal composition prior to regular satellite formation and favors the satellite formation model of Mosqueira and Estrada (2003a,b), but future Cassini Iapetus flybys may be needed to settle this issue. It is possible that by the time of this conference an improved constraint on this number will be available (Jacobson, pers. comm.).

  3. Phoebe and the Icy Saturnian Satellites: Implications for Satellite Origins

    NASA Astrophysics Data System (ADS)

    Mosqueira, I.; Estrada, P. R.

    2004-12-01

    -poor planetesimal-capture model of Estrada and Mosqueira (2003, 2004, this conference) has them forming from the impact ejecta (which presumably avoided re-accretion by gas drag inward migration) between Titan and a Triton-sized differentiated interloper, leading to Titan's eccentricity and likely causing it to differentiate (assuming it was not differentiated to begin with). In either case, these satellites may not be representative of the bulk composition of regular satellites. Furthermore, Titan's higher density and possible size-selective devolatilization (Stevenson et al. 1986) may also cloud the link between origin and composition. However, we argue that Iapetus would not have been affected by these processes, and so it may furnish a more direct test of whether the regular satellites of Saturn could have derived the bulk of their material directly from heliocentric orbit. At the time of submission, Iapetus' mass GM = 118 ± 11 km3/s2 (though a systematic source of error hasn't been ruled out; Jacobson, pers. comm.) and mean radius of 718 ± 8 km (Davies and Katayama 1984) yields a density of 1.14 ± 0.1 g/cm3, which implies processing of planetesimal composition prior to regular satellite formation and favors the satellite formation model of Mosqueira and Estrada (2003a,b), but future Cassini Iapetus flybys may be needed to settle this issue. It is possible that by the time of this conference an improved constraint on this number will be available (Jacobson, pers. comm.).

  4. Aborder la syllogomanie en médecine familiale

    PubMed Central

    Frank, Christopher; Misiaszek, Brian

    2012-01-01

    Résumé Objectif Examiner comment se présente la syllogomanie et suggérer aux médecins de famille des approches et des ressources pour sa prise en charge. Source des données On a fait une recension dans PubMed de 2001 à mai 2011. Le mot-clé MeSH hoarding a été utilisé pour identifier la recherche à ce sujet et passer en revue les articles portant sur les aspects neuropsychologiques de l’accumulation pathologique, son diagnostic et son traitement. Message principal La syllogomanie ou accumulation pathologique est souvent un problème peu évident en médecine familiale. Les patients qui ont une syllogomanie se présentent souvent à cause d’un événement sentinelle comme une chute ou un incendie à leur domicile. Quoique la syllogomanie soit traditionnellement associée à un trouble obsessionnel-compulsif, le plus souvent, les patients ont une maladie systémique secondaire associée à un comportement syllogomaniaque ou ont une syllogomanie en l’absence de caractéristiques compulsives considérables. On s’attend à ce que la syllogomanie soit incluse dans la 5e édition du Manuel diagnostique et statistique des troubles mentaux. Si possible, il vaut mieux prendre en charge la syllogomanie selon une approche multidisciplinaire. Un nombre grandissant de centres offrent des programmes pour améliorer les symptômes ou réduire les dangers. Il a été démontré que la prise en charge pharmacologique a une certaine utilité pour traiter les causes secondaires. Chez les personnes plus âgées, des problèmes comme la démence, la dépression et la toxicomanie sont souvent associés à un comportement d’accumulation pathologique. Il faudrait essayer de maintenir les patients à domicile dans la mesure du possible, mais l’évaluation de la capacité devrait guider l’approche à adopter. Conclusion L’accumulation pathologique est plus fréquente que ne le pensent les médecins de famille. Si on identifie une syllogomanie, il faudrait

  5. Fabrication de transistors mono-electroniques en silicium pour le traitement classique et quantique de l'information: une approche nanodamascene

    NASA Astrophysics Data System (ADS)

    Harvey-Collard, Patrick

    Les transistors mono-electroniques (SETs) sont des dispositifs ayant un grand potentiel d'applications, comme la detection de charge ultra-sensible, la logique a basse consommation de puissance, la memoire ou la metrologie. De plus, la possibilite de pieger un seul electron et de manipuler son etat de spin pourrait permettre des applications en informatique quantique. Le silicium est un materiau interessant pour fabriquer l'ilot d'un SET. Son gap semi-conducteur permet le fonctionnement du dispositif dans le regime a un seul electron ou trou et pourrait permettre d'etendre la plage d'operation du SET en temperature en augmentant l'energie d'addition du diamant central de la valeur du gap. En outre, le silicium beneficie de plus de quarante annees d'expertise en microfabrication et d'une compatibilite avec la technologie metal--oxyde--semi-conducteur complementaire (CMOS). Cependant, la fabrication de ces dispositifs fait face a de serieuses limitations a cause de la taille nanometrique requise pour l'ilot. A ce jour, les procedes de fabrication proposes permettant l'operation a la temperature ambiante sont trop peu reproductibles pour permettre des applications a grande echelle. Dans ce memoire de maitrise, la fabrication de transistors mono-electroniques en silicium (Si-SETs) pour le traitement classique et quantique de l'information est realisee avec un procede nanodamascene. Le polissage chimico-mecanique (CMP) est introduit comme etape clef de la fabrication du transistor, permettant le controle au nanometre pres (nanodamascene) de l'epaisseur du transistor. Cet outil permet la fabrication de dispositifs ayant une geometrie auparavant impossible a realiser et ouvre la porte a l'innovation technologique. De plus, un procede de gravure du silicium par plasma a couplage inductif (ICP) est developpe pour permettre la fabrication de nanostructures de silicium sur une nanotopographie alliant le nano et le 3D. Les Si-SETs fabriques sont caracterises a basse

  6. Metasomatism in the Chain of Ponds K-feldspars: Reassessing Discrete Domain 39Ar-40Ar Modelling

    NASA Astrophysics Data System (ADS)

    Villa, I. M.; Chafe, A. N.; Hanchar, J. M.; Wirth, R.

    2012-12-01

    retrogression. In summary, even the most "orthodox" CPP sample MH-10, if correctly examined, demonstrates that the influence of metasomatism is the primary determinant of its intra-grain age distribution and, by a different mechanism, also of its laboratory Ar release. This also establishes that what was observed in [1] as a specific case for the Aar sample is in fact a very general behavior of a vast majority of Kfs samples. The default procedure for 39Ar-40Ar Kfs analyses should thus include 3 steps: (i) view all Kfs samples as probable heterochemical mixtures; (ii) assess heterogeneity by CL and BSE prior to isotope analysis, similarly to the majority of U-Pb workers; (iii) incorporate the hygrochronometric information, rather than inaccurate temperature models, into the interpretive context. [1] I.M. Villa, J.M. Hanchar, Geochim Cosmochim Acta 2013 [2] I.M. Villa, M.L. Williams, Chapter 6, in: D. Harlov, H. Austrheim, Metasomatism and the Chemical Transformation of Rock, Springer 2012 [3] anonymous reviewer, pers. comm. [4] Villa, Geol. Soc. London Spec. Pub. 2013 [5] Lovera et al, Contrib Mineral Petrol 113 (1993) 381-393 [6] D. Lux, pers. comm.

  7. Prediction of seasonal water-table fluctuations in La Pampa and Buenos Aires, Argentina

    NASA Astrophysics Data System (ADS)

    Tanco, Raúl; Kruse, Eduardo

    2001-07-01

    The fluctuation of the water table east of La Pampa province and northwest of Buenos Aires province, Argentina, influences agricultural production in the region because it is closely related to the alternation of dry and wet periods. Sea-surface temperature (SST) anomalies have been used as predictors to forecast atmospheric variables in different regions of the world. The objective of this work is to present a simple model to forecast seasonal rainfall using SST distribution in the Pacific Ocean as a predictor. Once the relationship between precipitation and water-table fluctuations was established, a methodology for the prediction of water-table fluctuations was developed. A good agreement between observed and predicted water-table fluctuations was found when estimating water-table fluctuations in the summer and autumn seasons. Résumé. Les fluctuations de la nappe à l'est de la province de La Pampa et au nord-ouest de la province de Buenos Aires (Argentine) influence la production agricole de la région parce qu'elle est étroitement liée à l'alternance de saisons sèches et humides. Les anomalies de la température de surface de l'océan (SST) ont été utilisées comme prédicteurs pour prévoir les variables atmosphériques dans différentes régions du monde. L'objectif de ce travail est de présenter un modèle simple de prévision des précipitations saisonnières en utilisant comme prédicteur la distribution des SST dans l'Océan Pacifique. Une fois que la relation entre les fluctuations des précipitations et celles de la nappe a été établie, une méthodologie de prédiction des variations de la nappe a été mise au point. Un bon accord entre les variations de la nappe observées et celles prédites a été trouvé pour les estimations des variations de nappe en été et en automne. Resumen. La fluctuación del nivel freático al este de la provincia de La Pampa y al nordeste de la de Buenos Aires (Argentina) repercute en la producción agr

  8. Technique distribuee de gestion de la charge sur le reseau electrique et ring-tree: Un nouveau systeme de communication P2P

    NASA Astrophysics Data System (ADS)

    Ayoub, Simon

    suffisant pour les besoins des applications visees. Les protocoles de communication s'appuient sur un protocole de transport qui peut etre un de ceux utilises sur l'Internet comme TCP ou UDP. Pour valider le fonctionnement de de la technique de controle distribuee et le systeme de communiction Ring-Tree, un simulateur a ete developpe; un modele de chauffe-eau, comme exemple de charge, a ete integre au simulateur. La simulation d'une communaute de chauffe-eaux intelligents a montre que la technique de gestion de la charge combinee avec du stockage d'energie sous forme thermique permet d'obtenir, sans affecter le confort de l'utilisateur, des profils de consommation varies dont un profil de consommation uniforme qui represente un facteur de charge de 100%. Mots-cles : Algorithme Distribue, Demand Response, Gestion de la Charge Electrique, M2M (Machine-to-Machine), P2P (Peer-to-Peer), Reseau Electrique Intelligent, Ring-Tree, Smart Grid

  9. Etude de la transmission sonore a travers un protecteur de type "coquilles" : modelisation numerique et validation experimentale

    NASA Astrophysics Data System (ADS)

    Boyer, Sylvain

    On estime que sur les 3,7 millions des travailleurs au Quebec, plus de 500 000 sont exposes quotidiennement a des niveaux de bruits pouvant causer des lesions de l'appareil auditif. Lorsqu'il n'est pas possible de diminuer le niveau de bruit environnant, en modifiant les sources de bruits, ou en limitant la propagation du son, le port de protecteurs auditifs individualises, telles que les coquilles, demeure l'ultime solution. Bien que vue comme une solution a court terme, elle est communement employee, du fait de son caractere peu dispendieux, de sa facilite d'implantation et de son adaptabilite a la plupart des operations en environnement bruyant. Cependant les protecteurs auditifs peuvent etre a la fois inadaptes aux travailleurs et a leur environnement et inconfortables ce qui limite leur temps de port, reduisant leur protection effective. Afin de palier a ces difficultes, un projet de recherche sur la protection auditive intitule : " Developpement d'outils et de methodes pour ameliorer et mieux evaluer la protection auditive individuelle des travailleur ", a ete mis sur pied en 2010, associant l'Ecole de technologie superieure (ETS) et l'Institut de recherche Robert-Sauve en sante et en securite du travail (IRSST). S'inscrivant dans ce programme de recherche, le present travail de doctorat s'interesse specifiquement a la protection auditive au moyen de protecteurs auditifs " passifs " de type coquille, dont l'usage presente trois problematiques specifiques presentees dans les paragraphes suivants. La premiere problematique specifique concerne l'inconfort cause par exemple par la pression statique induite par la force de serrage de l'arceau, qui peut reduire le temps de port recommande pour limiter l'exposition au bruit. Il convient alors de pouvoir donner a l'utilisateur un protecteur confortable, adapte a son environnement de travail et a son activite. La seconde problematique specifique est l'evaluation de la protection reelle apportee par le protecteur. La

  10. Revue systématique sur la contribution des femmes distributeurs communautaires dans la lutte contre l'onchocercose en Afrique sub-saharienne

    PubMed Central

    Vouking, Marius Zambou; Tadenfok, Carine Nouboudem; Evina, Christine Danielle; Nsangou, Moustapha; Bonono, Cécile-Renée; Yondo, David

    2014-01-01

    Le Programme Africain de lutte contre l'Onchocercose (APOC) fut lancé en 1995, comme complément au brillant programme de lutte contre l'onchocercose en Afrique de l'Ouest. En 2011, plus de 80 millions de personnes ont bénéficié de cette intervention grâce à la contribution de 268 718 Distributeurs Communautaires (DC). Ses résultats significatifs occultent le rôle des femmes DC dans cette lutte cette maladie. L'objectif de cette analyse est de déterminer la contribution des femmes DC dans le traitement de l'onchocercose sous directive communautaire en Afrique sub-saharienne, et d’évaluer leur acceptation dans ledit programme. Comme stratégie de recherche, nous avons identifié toutes les études pertinentes de Janvier 1995 à Décembre 2012. Des recherches ont été effectuées dans les bases de données suivantes: Medline, Embase (Excerpta Medica Database), CINAHL (Cumulative Index to Nursing and Allied Health Literature), LILAS (Latin American and Caribbean Literature on Health Sciences). Nous avons également consulté les sites d'APOC et de l'OMS AFRO. Deux auteurs ont indépendamment évalué la pertinence des articles potentiels à l'aide des critères d'inclusion et d'exclusion bien définis. Six (6) des 25 études ont rempli les critères d'inclusion. Une étude a montré que 81% des populations où il y avait des femmes DC ont reçu l'Ivermectine par rapport à 78% des villages où n'exerçaient pas de femmes DC. Une autre étude a montré qu'il y a eu une prise de conscience croissante dans les IDC en faveur de l'acceptation de la participation des femmes à la distribution communautaire de l'Ivermectine. De plus, 70% des membres de la communauté interrogés dans certaines zones endémiques, ont déclaré que les femmes étaient plus engagées, persuasives et plus patientes que les hommes dans la distribution de l'Ivermectine. Au terme de cette étude, les évaluations qui ont été effectuées donnent à penser que les femmes peuvent jouer

  11. Neutrino oscillation parameter sampling with MonteCUBES

    NASA Astrophysics Data System (ADS)

    Blennow, Mattias; Fernandez-Martinez, Enrique

    2010-01-01

    used in GLoBES [1,2]. Solution method: MonteCUBES is written as a plug-in to the GLoBES software [1,2] and provides the necessary methods to perform Markov Chain Monte Carlo sampling of the parameter space. This allows an efficient sampling of the parameter space and has a complexity which does not grow exponentially with the parameter space dimension. The integration of the MonteCUBES package with the GLoBES software makes sure that the experimental definitions already in use by the community can also be used with MonteCUBES, while also lowering the learning threshold for users who already know GLoBES. Additional comments: A Matlab GUI for interpretation of results is included in the distribution. Running time: The typical running time varies depending on the dimensionality of the parameter space, the complexity of the experiment, and how well the parameter space should be sampled. The running time for our simulations [3] with 15 free parameters at a Neutrino Factory with O(10) samples varied from a few hours to tens of hours. References:P. Huber, M. Lindner, W. Winter, Comput. Phys. Comm. 167 (2005) 195, hep-ph/0407333. P. Huber, J. Kopp, M. Lindner, M. Rolinec, W. Winter, Comput. Phys. Comm. 177 (2007) 432, hep-ph/0701187. S. Antusch, M. Blennow, E. Fernandez-Martinez, J. Lopez-Pavon, arXiv:0903.3986 [hep-ph].

  12. Photoconductivité et photoémission de diamant(s) sous irradiation XUV femtoseconde

    NASA Astrophysics Data System (ADS)

    Gaudin, J.; Geoffroy, G.; Guizard, S.; Esnouf, S.; Olevano, V.; Petite, G.; Klimentov, S. M.; Pivovarov, P. A.; Garnov, S. V.; Carre, B.; Martin, P.; Belsky, A.

    2005-06-01

    Nous décrivons une étude des propriétés de photoconductivité (PC) induite dans différents types de diamants (monocristaux de type IIa et couches CVD) par des impulsions femtosecondes XUV (jusqu'à l'harmonique 19 du laser titane/saphir). En complément de ces études, les spectres de photoémission de ces échantillons ont aussi été étudiés (harmoniques 13 à 27). En fonction de l'ordre de l'harmonique, on constate que le signal de PC augmente tout d'abord (harmoniques 9 à 13) puis diminue au delà. Si l'augmentation s'interprète aisément comme résultant de phénomènes de multiplication par collisions inélastiques, la diminution ultérieure n'a pas pour le moment d'explication. Les mesures de spectre de photoémission suggèrent un effet important de la relaxation par émission de plasmons. Enfin, nous avons réalisé le premier calcul ab-initio de la durée de vie des porteurs tenant compte des interactions électron-électron, à l'aide d'une approche de théorie quantique à plusieurs corps de type GW. Au voisinage du gap, on observe un comportement proche de celui d'un liquide de Fermi. A plus haute énergie on observe des déviations à ce comportement, provenant d'effets de structure de bande d'une part, et d'excitations de plasmons d'autre part.

  13. Evolution des quasiparticules nodales du cuprate supraconducteur YBa2Cu3Oy en conductivite thermique

    NASA Astrophysics Data System (ADS)

    Rene de Cotret, Samuel

    Ce memoire presente des mesures de conductivite thermique sur les supraconducteurs YBCO et Tl-2201 afin de statuer sur la presence possible d'un point critique quantique (QCP) dans le diagramme de phase de cuprates. Ce point critique quantique serait a l'origine de la reconstruction de la surface de Fermi, d'un large cylindre de trous en de petites poches de trous et d'electrons. La conductivite thermique dans le regime T → 0 permet d'extraire une quantite purement electronique liee aux vitesses de Fermi et du gap, au noeud. Une discontinuite dans cette quantite pourrait signaler la traversee du dopage critique qui reconstruit la surface de Fermi. Plusieurs sondes experimentales distinguent une transition de phase ou un crossover a T* a temperature finie. D'autres sondes mettent en evidence une transition de phase sous l'effet d'un champ magnetique. La presence ou non de cet ordre, a temperature et champ magnetique nul questionne la communaute depuis plusieurs annees. Dans cette etude, nous detectons une variation brusque de kappa0/T a p = 0.18 dans YBCO et a p = 0.20 dans Tl-2201. Ces sauts sont interpretes comme un signe de la transition a temperature nulle et sont en faveur d'un QCP. Le manque de donnees d'un meme materiau a ces dopages ne permet pas de valider hors de tout doute l'existence d'un point critique quantique. Le modele theorique YRZ decrit aussi bien les donnees de conductivite thermique. Des pistes de travaux experimentaux a poursuivre sont proposees pour determiner la presence ou non du QCP de facon franche. Mots-cles : Supraconducteurs, cuprates, conductivite thermique, point critique quantique.

  14. Detection of ruminant meat and bone meals in animal feed by real-time polymerase chain reaction: result of an interlaboratory study.

    PubMed

    Prado, Marta; Berben, Gilbert; Fumière, Olivier; van Duijn, Gert; Mensinga-Kruize, Jonne; Reaney, Scott; Boix, Ana; von Holst, Christoph

    2007-09-01

    The commercialization of animal feeds infected by prions proved to be the main cause of transmission of bovine spongiform encephalopathy (BSE). Therefore, feed bans were enforced, initially for ruminant feeds, and later for all feeds for farmed animals. The development and validation of analytical methods for the species-specific detection of animal proteins in animal feed has been indicated in the TSE (Transmissible Spongiform Encephalopathies) Roadmap (European Commission. The TSE (Transmissible Spongiform Encephalopathy) roadmap. URL: http://europa.eu.int/comm/food/food/biosafety/bse/roadmap_en.pdf, 2005) as the main condition for lifting the extended feed ban. Methods based on polymerase chain reaction (PCR) seem to be a promising solution for this aim. The main objective of this study was to determine the applicability of four different real-time PCR methods, developed by three National expert laboratories from the European Union (EU), for the detection and identification of cattle or ruminant species in typical compound feeds, fortified with meat and bone meals (MBM) from different animal species at different concentration levels. The MBM samples utilized in this study have been treated using the sterilization condition mandatory within the European Union (steam pressure sterilization at 133 degrees C, 3 bar, and 20 min), which is an additional challenge to the PCR methods evaluated in this study. The results indicate that the three labs applying their PCR methods were able to detect 0.1% of cattle MBM, either alone or in mixtures with different materials such as fishmeal, which demonstrates the improvement made by this technique, especially when compared with results from former interlaboratory studies. PMID:17725317

  15. Macroscopic noncontextuality as a principle for almost-quantum correlations

    NASA Astrophysics Data System (ADS)

    Henson, Joe; Sainz, Ana Belén

    2015-04-01

    Quantum mechanics allows only certain sets of experimental results (or "probabilistic models") for Bell-type quantum nonlocality experiments. A derivation of this set from simple physical or information theoretic principles would represent an important step forward in our understanding of quantum mechanics, and this problem has been intensely investigated in recent years. "Macroscopic locality," which requires the recovery of locality in the limit of large numbers of trials, is one of several principles discussed in the literature that place a bound on the set of quantum probabilistic models. A similar question can also be asked about probabilistic models for the more general class of quantum contextuality experiments. Here, we extend the macroscopic locality principle to this more general setting, using the hypergraph approach of Acín, Fritz, Leverrier, and Sainz [Comm. Math. Phys. 334(2), 533-628 (2015), 10.1007/s00220-014-2260-1], which provides a framework to study both phenomena of nonlocality and contextuality in a unified manner. We find that the set of probabilistic models allowed by our macroscopic noncontextuality principle is equivalent to an important and previously studied set in this formalism, which is slightly larger than the quantum set. In the particular case of Bell scenarios, this set is equivalent to the set of "almost-quantum" models, which is of particular interest since the latter was recently shown to satisfy all but one of the principles that have been proposed to bound quantum probabilistic models, without being implied by any of them (or even their conjunction). Our condition is the first characterization of the almost-quantum set from a simple physical principle.

  16. Usefulness of Long-term Urban Greenhouse Gas monitoring: the London record

    NASA Astrophysics Data System (ADS)

    Nisbet, E. G.; Lowry, D.; Fisher, R. E.

    2010-12-01

    Long-term monitoring of CH4 at Egham, SW London, shows reduction in the source input since the mid 1990s. There is a distinct seasonal cycle, in part reflecting background variation, tracked by comparison with the Mace Head Atlantic record. Local emissions, led by higher fossil fuel consumption in the winter months, also contribute to the cycle. Inter-annual variability is in part meteorological. The urban increment can be estimated by comparing specific wind sectors (e.g. incoming SSW Atlantic air compared to easterly urban air). Ratios of CH4 to CO2, calculated from the continuous records, allow relative emissions of CH4 and CO2 to be quantified, providing immediate tests of inventories. Ratios of excess over background of CH4 to CO2 for periods of 7 consecutive days of easterly air flow to the Egham site (from London) indicate a reduction in CH4 emissions of 11% relative to CO2 over the period 1999-2007. Isotopes discriminate sharply between methane sources. Diurnal (Keeling plot) δ13CCH4 campaigns identify source mixes. For London, both CO2 and CH4 annual emissions are cited to 0.1 ton (i.e. to 9 significant figures of CO2, and to 6 figures for methane). However, it can be difficult to reconcile isotopic measurements of local methane increments with declared emissions budgets (Lowry et al., 2001). Rapid, inexpensive, small-sample isotopic techniques (Fisher et al., 2006) allow simple tests of the veracity of emissions declarations. Local emissions can be detected, by geographic location, given known background patterns. Moreover, seasonal variation can be tracked. This makes it potentially possible cheaply to audit emissions in populated areas. Lowry, D., et al. (2001) J. Geophys. Res., 106, 7427-48 Fisher, R., et al. (2006) Rapid Comm. Mass Spectrometry, 20, 200-208.

  17. Constraining the relation between tremor and slow slip using tremor distributions and PBO strainmeter data

    NASA Astrophysics Data System (ADS)

    Delbridge, B.; Houston, H.

    2010-12-01

    The relationship between tremor and slow slip can be viewed in the context of a rate-and-state formulation. The expected distribution of slip rate inside a slow slip pulse exhibits a large slip rate in the leading front that decays back towards the healing front. We stacked along-strike tremor distributions on the advancing tremor fronts for 6 major Cascadia ETS events, and observed a skewed spatial distribution of tremor rate, consistent with that expected in a slow slip pulse. Our analysis places further physical constraints on the duration, width, and along-strike extent of a slow slip pulse. Source scaling laws predict the width of propagation patterns, given the observed propagation velocities (pers. comm. J-P Ampuero). The recently-observed tremor migration pattern termed Rapid Tremor Reversal (RTR) is ˜15 km wide, consistent with the theoretically-predicted width. We examine signatures of tremor migration in the accumulating data from PBO borehole strainmeters in Cascadia. First, some RTRs appear to be recorded by strainmeters, and analysis of those signals may provide constraints on the geometry and amount of slip in RTRs. In addition, we aim to interrogate strain data to place constraints on the updip extent of slip in large Northern Washington ETS events, in order to resolve the down-dip discrepancy between tremor locations and that of slip from inversion of GPS data (Wech et al., JGR, 2009). We use the location, timing, and density of observed tremor to help constrain the assumed slipping surface, as well as our theoretically and empirically derived constraints on a slow slip pulse. Thus, a relatively realistic slip geometry is used to predict the strain changes expected from recent large ETS events.

  18. Volvariella volvacea lectin activates mouse T lymphocytes by a calcium dependent pathway.

    PubMed

    Sze, S C W; Ho, J C K; Liu, W K

    2004-08-15

    The immunomodulatory lectin, Volvariella volvacea lectin (VVL), isolated from the edible mushroom, Volvariella volvacea, has been shown to stimulate the expression of Th1 cytokines and the proliferative activity of mouse splenocytes (She et al. [1998]: Biochem Biophys Res Comm 247:106-111). In order to elucidate the mechanisms underlying these activities, we conducted a kinetic analysis of the early and late activation markers in mouse T lymphocytes: (1) flow cytometric analysis of calcium influx, (2) induction of activation molecules (CD25 and CD69), (3) expression and DNA-binding activity of the nuclear factor of activated T cells (NFAT), NFkappaB, and activation protein-1 (AP-1), (4) translational production of cytokines (interleukin-2 (IL-2) and interferon-gamma (IFNgamma)), and (5) cell proliferation by expression of proliferating cell nuclear antigen (PCNA) and tritiated thymidine incorporation. All results showed that VVL induced a rapid expression of CD69, CD25, NFAT, IL-2, and PCNA in a dose- and time-dependent manner, leading to lymphocyte proliferation. These effects brought about by VVL were more potent than those stimulated by equimolar concentrations of mitogenic lectin, concanavalin A (Con A). Cell activation and proliferation were mediated through a calcium-dependent pathway as demonstrated by a VVL-induced increase of intracellular calcium influx, and a proliferation inhibition by the Ca-dependent phosphatase calcineurin blocker-cyclosporin A (CsA). Taken all data together, VVL is a lectin which activates lymphocyte through successive calcium influx, nuclear localization of NFAT transcription factor, induction of activation markers, CD25 and CD69, intracellular cytokine production, and cell proliferation. PMID:15258902

  19. Tensions entre rationalité technique et intérêts politiques : l’exemple de la mise en œuvre de la Loi sur les agences de développement de réseaux locaux de services de santé et de services sociaux au Québec

    PubMed Central

    Contandriopoulos, D.; Hudon, Raymond; Martin, Elisabeth; Thompson, Daniel

    2013-01-01

    Sommaire L’objet de cet article est constitué par les processus décisionnels entourant la mise en œuvre de la Loi sur les agences de développement de réseaux locaux de services de santé et de services sociaux (Loi 25). Nous entendons mettre en lumière les stratégies des groupes ou institutions de diverses natures qui ont fait valoir leurs préférences et ont tenté, avec un succès inégal, d’influencer les décisions relatives à cette réforme majeure de la structure du système de santé québécois. Au plan théorique, nous nous appuyons principalement sur les modèles d’analyse du lobbying qui, depuis les travaux fondateurs de Milbrath (1960, 1963), présentent cette pratique comme un processus fondamental d’échange d’information. Selon les données colligées dans les retranscriptions d’entrevues, les stratégies observées correspondent effectivement aux caractéristiques constitutives du lobbying et, dans quelques situations, à celles du patronage. La combinaison de ces divers éléments révèle que la mise en œuvre de la Loi 25 s’avère être avant tout un processus proprement politique. Ainsi, furent relégués au second plan les arguments techniques qui composaient initialement les objectifs de la Loi. PMID:23509412

  20. Les carcinomes epidermoïdes du scrotum: à propos de 7 cas avec revue de la litterature

    PubMed Central

    Halfya, Ayoub; Elmortaji, Khalid; Redouane, Rabii; fethi, Meziane; Rafik, Amine; Mohamed, Ezzoubi; Abdessamad, Chlihi

    2015-01-01

    Quoique rare le carcinome épidermoïde du scrotum a un mauvais pronostic. Les Carcinomes du scrotum induite et - liées au travail sont moins fréquentes en raison d'une meilleure hygiène, vêtements de protection, et la sensibilisation de la cancérogénicité des huiles industrielles. L’épidémie à l'HPV a induit une augmentation de l'incidence. Le traitement de dépend toujours exérèse locale de la lésion primaire. La radiothérapie a peu de bénéfice thérapeutique dans le traitement d'un carcinome épidermoïde du scrotum. La bléomycine peut être utile comme traitement adjuvant pour les maladies ilio-inguinal généralisée avant la tentative exérèse, même si cela n'a pas encore été prouvé. Entre janvier 2011 au 1er janvier 2013, 7 patients atteints de carcinome épidermoïde ont été pris en charge, Trois patients ont présenté une localisation ganglionnaire. Les sept patients ont eu un traitement chirurgical par exérèse large avec reconstruction, Deux patients ont été adressé pour chimiothérapie.2 patients ont présenté une récidive, dont un est décédé. PMID:26113906