MECHANICS

Author: MONTEJO CERVERA M. NOELIA.
Year: 2004.
University: SANTIAGO DE COMPOSTELA.
Place of defense: FACULTAD DE FISICA.
Place of preparation: FACULTAD DE FÍSICA.

Summary: Historically, the modern neuroscience began with the neuroanatomia.Por midst of investigations Golgi, Cajal, Lorente Non, among others, neuroanatomía has become a science developed consistently and deeply understood prior to the onset of the electrófisiologia and the biology molecular.Durante decades have collected data neuroanatómicos accumulated in laboratories around the world. Despite this wealth of data, modeling the neuroanatomia is not as common as the moderate electrofisiologico.Esto may be because the neurophysiological activity can be represented in computer models by intuitive mathematical formalism circuit eléctricos.Por other hand, the main task of understanding information processing in the brain raises further questions delas numerous experimental, theoretical problems that continuously change at all levels from molecules to the general conduct of cerebro.El theoretical analysis and computer modeling are important tools for characterize how the nervous system works and understand why some manera.La neuroscience covers approximations that extend from estrudios molecular and cellular until psychophysics humana.La psychology and neuroscience covers approximations that extend from cellular and molecular studies to psychophysics and humana.La theoretical neuroscience psychology promotes interaction between these sub-disciplinas building compact representations that have been learned through bridges between different levels of description and identification concepts and principles unificados.Entender functioning of the brain structure presents a major challenge due to its complexity estrucrtural since there are a large number of cells that have different shapes and properties eléctricas.Hay patterns connection desconcetantes within and among certain regions neuranales.Existen dozens of neurotransmitters and modular, each consu own repertoire of receptors and actions sinápticas.El work presented in this report focuses on the study, dynamic than disiológico the spread of information in a network neuronal.El purpose is to characterize the overall performance of the network sométida a series of estímulos.Principalmente, interested in establishing whether the system is capable of sync, regardless of their architecture or their topological external stimulation, as well as whether there may be a flow of information within the same.

Author: ALONSO MUÑOZ SERGIO.
Year: 2004.
University: BARCELONA.
Place of defense: FACULTAD DE FÍSICA.
Place of preparation: FACULTAD DE FÍSICA.

Summary: Excitable media are non-linear systems that are characterized as a disturbance initial threshold induces activation system for a period of time, after which the system relaxes to the stable condition. The typical example of element excitable conesponde to the activation of a neuron by an electrical signal of sufficient intensity. Through this dynamic diffusive processes typically leads to the propagation of waves in systems prevalent in the form of waves traveling waves or spirals. Typical examples of these types of systems are the propagation of concentration in the chemical reaction Belousov-Zhabotinsky, and the spread of an electrical pulse by inducing cardiac tissue contraction of fibers of the heart. The phenomenology of the waves in these environments is very extensive, and in this thesis examines the impact of a signal extema, deterministic or random in nature, the dynamics of these systems prevalent in waves. Mainly three different problems are considered: First they studied the effect of a random signal in the dynamics of the spiral waves; also conducts a comprehensive study on the topic of transitions excitability induced noise, and finally considers the effect of a Random signal structure with space and an oscillating signal in the evolution of certain instabilities own three-dimensional excitable media. Since the study was done on generic models of wave propagation, the results might eventually apply to any type of system excitable, both biological and chemical.

Author: LÓPEZ DE SUBIJANA HERNÁNDEZ CRISTINA.
Year: 2005.
University: POLITÉCNICA DE MADRID.
Place of defense: FACULTAD DE CIENCIAS DE LA ACTIVIDAD FISICA Y EL DEPORTE.
Place of preparation: ESCUELA TÉCNICA SUPERIOR DE ARQUITECTURA.

Summary: The tennis serve is one of the key blows in the development of tennis player at a high level. The objectives of this study were to obtain a theoretical model of the art of personal service and tennis, develop a methodology to improve the technique of players he nivelo competition and High Level. The technique used was photogrammetry 3D. We com approach eficacioa speed output of the ball. The shows were 15 service plans implemented by two players DAN. In both cases were found significant transfers of power between segments at different stages of hits. Clusters kinetic variables, as well as the stages of hits, showed two different models are not compatible with each other. We found two significant discriminant function, which can obtain the parameters underlying each player to execute a kick "good".