Tau physics with polarized beams

We present the first results on tau physics using polarized beams. These include measurements of the \tau Michel parameters \xi and \xi\delta and the \tau neutrino helicity h_\nu. The measurements were performed using the SLD detector at the Stanford Linear Collider (SLC). (Invited talk at the 1995 International Europhysics Conference on High Energy Physics, Brussels, Belgium, July 27 - August 2, 1995.

Transport mechanism through metal-cobaltite interfaces

The resistive switching (RS) properties as a function of temperature were studied for Ag/La$_{1-x}$Sr$_x$CoO$_3$ (LSCO) interfaces. The LSCO is a fully-relaxed 100 nm film grown by metal organic deposition on a LaAlO$_3$ substrate. Both low and a high resistance states were set at room temperature and the temperature dependence of their current-voltage (IV) characteristics was mea- sured taking care to avoid a significant change of the resistance state. The obtained non-trivial IV curves of each state were well reproduced by a circuit model which includes a Poole-Frenkel element and two ohmic resistances. A microscopic description of the changes produced by the RS is given, which enables to envision a picture of the interface as an area where conductive and insulating phases are mixed, producing Maxwell-Wagner contributions to the dielectric properties.Comment: 13 pages, 5 figures, to be published in APL. Corresponding author: C. Acha ([email protected]

ConSUS: A light-weight program conditioner

Program conditioning consists of identifying and removing a set of statements which cannot be executed when a condition of interest holds at some point in a program. It has been applied to problems in maintenance, testing, re-use and re-engineering. All current approaches to program conditioning rely upon both symbolic execution and reasoning about symbolic predicates. The reasoning can be performed by a ‘heavy duty’ theorem prover but this may impose unrealistic performance constraints. This paper reports on a lightweight approach to theorem proving using the FermaT Simplify decision procedure. This is used as a component to ConSUS, a program conditioning system for the Wide Spectrum Language WSL. The paper describes the symbolic execution algorithm used by ConSUS, which prunes as it conditions. The paper also provides empirical evidence that conditioning produces a significant reduction in program size and, although exponential in the worst case, the conditioning system has low degree polynomial behaviour in many cases, thereby making it scalable to unit level applications of program conditioning

Parallel electromagnetic modelling for the nonlinear electrotechnic systems

AbstractWe present a parallel implementation for the nonlinear electromagnetic modelling using PVM environment. Theoretical study shows that the computation can be highly parallelizable but the communication can be a handicap if we do not overlap communication with computation especially when the machine communication parameters values are very high

Is Mixed-Species Living Cognitively Enriching? Enclosure Use and Welfare in Two Captive Groups of Tufted Capuchins (Sapajus apella) and Squirrel Monkeys (Saimiri sciureus)

Non-human primates have complex relationships with conspecifics and also other animals with whom they share their habitat in the wild. Some primates, such as capuchin monkeys (Sapajus apella) and squirrel monkeys (Saimiri sciureus), naturally associate, with the potential to act as both proximate and ultimate influences on each other’s behavior. There are a number of benefits to exhibiting such species in mixed communities in captivity, for instance the increased social complexity provides both environmental and social enrichment and appropriate cognitive challenges, ultimately enhancing their welfare in restricted captive enclosures. Monitoring how these species interact and utilize their available space is important for effective care and management. But despite this connection, there remains relatively little conclusive data on whether mixed groups of captive primates are cognitively enriching. This study examined patterns of space use in two mixed-species groups of Sapajus and Saimiri housed at the Living Links to Human Evolution Research Centre, RZSS Edinburgh Zoo. We predicted that if Sapajus and Saimiri were attracted to the presence of the other species then they would share the same space when in mixed enclosures. The data did not support this prediction. Sapajus showed a preference for central zones, while Saimiri spent more time in their exclusive indoor enclosure and appeared to prefer peripheral zones of their outdoor enclosures and close to doorways leading indoors. We conclude that while housing these species in a mixed exhibit may not be cognitively enriching it does provide appropriate cognitive challenges that can still enhance the welfare of individuals

La prise en charge des suicides par précipitation en traumatologie

Introduction: A travers ce travail, l’épidémiologie et la psychopathologie du suicide par précipitation seront rappelées, le rôle du chirurgien traumatologue dans la restauration physique et psychique sera démontré. Méthodes: Nous rapportons une étude rétrospective de 15 suicidants par précipitation admis pour des traumatismes complexes de l’appareil locomoteur entre 2004 et 2007. Résultats: Il s’agissait de primosuicidants, comprenant 10 femmes et 5 hommes. L’âge moyen des hommes est de 26,5 ans (24-34 ans) et celui des femmes de 40,7 ans (17-45 ans). Le bilan lésionnel des suicidants a retrouvé 14 fractures des membres inférieurs, 4 traumatisme du rachis avec compression médullaire dans 1 cas, une fracture du bassin; deux traumatismes du membre supérieur. Aucun de ces patients n’a présenté de lésions viscérales ni de traumatismes crâniofacial. 80% (n = 12) des patients souffraient d’une affection psychiatrique avant leur passage à l’acte suicidair : 8 pour une pathologie dépressive et 4 pour une schizophrénie. Chaque suicidant a subi au moins un acte chirurgical. Tous les patients avaient poursuivi la prise en charge psychiatrique en ambulatoire. Nos résultats fonctionnels étaient satisfaisants sans complications. Aucun des patients n’a récidivé. La pathologie suicidaire représente un problème de santé publique. Le suicide par précipitation représente 5 % de l’ensemble des modalités suicidaires. Les traumatismes occasionnés par ce mode suicidaire sont complexes et graves. Leur prise en charge nécessite une collaboration multidisciplinaire. Conclusion: La réparation chirurgicale permet à la fois le rétablissement de la fonction et l’amélioration psychique du sujet prévenant contre une rechute dépressive ou une récidive suicidaire