Gamma Radiation by Neutralino Stars

A new model of gamma radiation (GR) generated by neutralino annihilation in neutralino stars (NeS) is proposed. Diffuse Galactic and extragalactic GR is calculated for this model and is shown to be in a reasonable agreement with observations. The point source component (P) is picked out among nonidentified discrete gamma sources from EGRET catalog. This component is shown to be distributed isotropically and homogeneously, as it should be for NeS. Gamma radiation from significant part of P-sources is supposed to be the direct radiation from individual NeS. This supposition is shown to be in agreement with observations. The comparison of the theory with observed GR gives a possibility to establish some important features of CDM particle.Comment: 12 pages, LaTe

Cold Dark Matter detection in SUSY models at large tan(beta)

We study the direct detection rate for SUSY cold dark matter (CDM) predicted by the minimal supersymmetric standard model with universal boundary conditions and large values for tan(beta). The relic abundance of the lightest supersymmetric particle (LSP), assumed to be approximately a bino, is obtained by including its coannihilations with the next-to-lightest supersymmetric particle (NLSP), which is the lightest s-tau. The cosmological constraint on this quantity severely limits the allowed SUSY parameter space, especially in the case the CP-even Higgs has mass of around 114 GeV. We find that for large tan(beta) it is possible to find a subsection of the allowed parameter space, which yields detectable rates in the currently planned experiments.Comment: Changes in text and figure

Diseño de un sistema de señalización en una línea ferroviaria para circular a 200 km/h e implementación posterior del sistema ERTMS para circular a 300 km/h.

Máster Universitario en Sistemas FerroviariosEl transporte en ferrocarril forma parte intrínseca de la sociedad actual, la demanda se incrementa con el paso del tiempo, por lo que se debe proveer de sistemas con un elevado nivel de seguridad, este proyecto se ha realizado partiendo de la base de esa característica, evaluando y planteando una alternativa de diseño a líneas ferroviarias, con tramos en vía única, teniendo en cuenta la demanda de la sociedad, pero sin olvidar la eficiencia del sistema en términos económicos, haciendo viable la construcción de futuras infraestructuras de alta velocidad con inversiones inferiores a las actuales, considerando los aspectos de la señalización necesarios para garantizar un transporte ferroviario seguro y eficaz. En una primera parte, se proponía una línea ferroviaria, con una longitud total de 180 km, cuatro estaciones y tramos en vía doble y única, en el cual se pedía estudiar si era posible operar con una capacidad inicial de 5 trenes / hora a 200 km/h con sistema de señalización convencional (señales laterales y sistema embarcado ASFA), y posteriormente estudiar la posibilidad de operar con una capacidad de 10 trenes / hora a 300 km/h con el sistema ERTMS Nivel 2, en la misma propuesta de línea, ambas considerando los respectivos análisis de riesgos, y junto con el diseño final de la línea incluyendo los equipos necesarios para la operación con ambos sistemas de señalización. Utilizando los gráficos de malla de trenes, se determinó que la línea propuesta inicial no era acorde con las necesidades de capacidad esperadas, por lo que se elaboró una propuesta de línea, ampliando las zonas de vía doble en detrimento de kilómetros en vía única, para permitir el paso simultaneo de trenes en determinados puntos kilométricos. Posteriormente se diseñó el sistema de señalización de la línea propuesta con los cambios introducidos para lograr la capacidad de transporte especificada, siguiendo los estándares nacionales, permitiendo una operación ferroviaria segura y fiable

Henry Botino

Biographie et bibliographie de l\u27auteur, ainsi qu\u27un débat sur le thème de la poésie. Lecture de poèmes: "La complainte du misérable", " le choix", "le palestinien", "à Kanaki", "O Guadeloupe", "Noël sans noël (sur la misère des enfants), "Freedom" (sur l\u27Afrique du Sud). "Humour, amour, poésie"

Quantitatively comparing virtual and real draping of clothes

Several cloth modeling techniques have been proposed. Their main purpose is the realistic simulation of the garments of virtual actors for entertainment and advertising. In these areas, the main concern is to construct fast algorithms, able to produce impressive and qualitatively satisfactory draping of clothes. Other applications, as designing, manufacturing and selling real garments, call for a virtual draping which not only satisfies the human eye, but also closely mimics the real physical draping of clothes. From this viewpoint we will discuss some modeling techniques, and present some result concerning the quantitative comparison between the draping of real clothes and their virtual counterpart

Interactive reconstruction of 3-D objects from silhouettes

Many techniques for reconstructing 3-D shapes from 2-D images use silhouette data. A problem with this approach is that, if no a priori information about the 3-D shape is available, we do not know neither the accuracy of the reconstruction, nor where it is better to locate new viewpoints for improving the accuracy. We present and demonstrate a new general approach to interactive, object-specific shape-from-silhouette algorithms. The approach holds for completely unknown shapes. It is based on a necessary condition for the reconstruction to have been performed with the best possible accuracy. From this condition, we derive: 1) a quantitative measure of reconstruction accuracy; 2) rules for finding new viewpoints, if the accuracy is not satisfactory. The algorithm has been implemented for polyhedra, and demonstrated in a virtual environment

Influence of different types of sockets on the range of motion of the hip joint by the transfemoral amputee

AbstractPurposeTo compare the individual influence of different types of socket designs on the hip's range of motion in transfemoral amputees.Patients and methodsWe studied the kinematic parameters of the hip joint for patients with transfemoral amputation under four experimental conditions: without a socket, with a quadrilateral socket, an ischial containment socket, an ischial-ramal containment socket. An opto-electronic system was used to record the movements in the frontal and sagittal planes for a 3D movement analysis.ResultsThe hip's range of motion is always significantly restricted with the sockets, regardless of their type, compared to the situation without a socket (P<0.05). The adduction and extension movements are the most restricted. The global amplitude (i.e., the sum of all the ranges of motion) is significantly higher for the ischial-ramal containment socket (139.5°) compared to the ischial containment socket (125.4°, P=0.002) and the quadrilateral socket (127.3°, P=0.01). No comparable study exists in the literature, especially for the ischial-ramal containment socket.ConclusionThe ischial-ramal containment socket seems to be the most interesting type of socket in terms of the criterion studied. It still remains to identify the possible functional improvements that this design would provoke during gait and during daily activities