{"id":71058,"date":"2004-03-11T00:00:00","date_gmt":"2004-03-11T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/propagation-of-waves-in-excitable-media-under-spatio-temporal-forcing\/"},"modified":"2004-03-11T00:00:00","modified_gmt":"2004-03-11T00:00:00","slug":"propagation-of-waves-in-excitable-media-under-spatio-temporal-forcing","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/propagation-of-waves-in-excitable-media-under-spatio-temporal-forcing\/","title":{"rendered":"Propagation of waves in excitable media under spatio-temporal forcing."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Sergio Alonso Mu\u00f1oz <\/strong><\/h2>\n<p>Los medios excitables son sistemas no lineales que se caracterizan porque una perturbaci\u00f3n inicial por encima de un umbral induce una activaci\u00f3n del sistema durante un espacio de tiempo, despu\u00e9s del cual el sistema relaja a la situaci\u00f3n estable.  el t\u00edpico ejemplo de elemento excitable conesponde a la activaci\u00f3n de una neurona por una se\u00f1al el\u00e9ctrica de suficiente intensidad.  mediante procesos t\u00edpicamente difusivos esta din\u00e1mica da lugar a la propagaci\u00f3n de ondas en sistemas extendidos, en forma de ondas viajeras o de ondas espirales.  los ejemplos t\u00edpicos de estos tipos de sistemas son la propagaci\u00f3n de ondas de concentraci\u00f3n en la reacci\u00f3n qu\u00edmica belousov-zhabotinsky, y la propagaci\u00f3n de un pulso el\u00e9ctrico por el tejido card\u00edaco induciendo la contracci\u00f3n de las fibras del coraz\u00f3n.  la fenomenolog\u00eda de las ondas en estos medios es muy extensa, y en esta tesis se estudia el efecto de una se\u00f1al extema, de car\u00e1cter determinista o aleatorio, en la din\u00e1mica de estas ondas en sistemas extendidos.  principalmente tres problemas diferentes son considerados: primero se estudia el efecto de una se\u00f1al aleatoria en la din\u00e1mica de las ondas espirales; adem\u00e1s se realiza un estudio general sobre el t\u00f3pico de las transiciones de excitabilidad inducidas por ruido; y finalmente se considera el efecto de una se\u00f1al aleatoria con estructura espacial y de una se\u00f1al oscilatoria en la evoluci\u00f3n de ciertas inestabilidades propias de medios excitables tridimensionales.  como el estudio se realiza sobre modelos gen\u00e9ricos de propagaci\u00f3n de ondas, los resultados obtenidos podr\u00edan aplicarse eventualmente a cualquier tipo de sistema excitable, tanto qu\u00edmico como biol\u00f3gico.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Propagation of waves in excitable media under spatio-temporal forcing.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Propagation of waves in excitable media under spatio-temporal forcing. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Sergio Alonso Mu\u00f1oz <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 03\/11\/2004<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Francesc Sagues Mestre<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jos\u00e9 m Sancho herrero <\/li>\n<li>alexander Mikhailov khodorevsky (vocal)<\/li>\n<li>maxi San Miguel rubial (vocal)<\/li>\n<li>jordi Garc\u00eda ojalvo (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Sergio Alonso Mu\u00f1oz Los medios excitables son sistemas no lineales que se caracterizan porque una perturbaci\u00f3n inicial [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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