{"id":103333,"date":"2018-03-11T10:25:51","date_gmt":"2018-03-11T10:25:51","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/contributions-to-the-development-of-objective-techniques-for-presence-measurement-in-virtual-environments-by-means-of-brain-activity-analysis\/"},"modified":"2018-03-11T10:25:51","modified_gmt":"2018-03-11T10:25:51","slug":"contributions-to-the-development-of-objective-techniques-for-presence-measurement-in-virtual-environments-by-means-of-brain-activity-analysis","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/actividad-cerebral\/contributions-to-the-development-of-objective-techniques-for-presence-measurement-in-virtual-environments-by-means-of-brain-activity-analysis\/","title":{"rendered":"Contributions to the development of objective techniques for presence measurement in virtual environments by means of brain activity analysis"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Beatriz Rey Solaz <\/strong><\/h2>\n<p>En esta tesis, se propone el uso de la t\u00e9cnica de doppler transcraneal (dtc) para monitorizar la actividad cerebral durante la exposici\u00f3n a entornos virtuales (ev) y as\u00ed poder analizar los correlatos cerebrales del sentido de presencia.  las hip\u00f3tesis de partida son las siguientes: 1) dtc se podr\u00e1 utilizar f\u00e1cilmente en combinaci\u00f3n con sistemas de realidad virtual. 2) los datos de velocidad de flujo sangu\u00edneo medidos por dtc se podr\u00e1n utilizar para analizar cambios de actividad cerebral durante la exposici\u00f3n a ev. 3) habr\u00e1 diferencias en la velocidad del flujo sangu\u00edneo asociadas a distintos niveles de presencia. 4) habr\u00e1 correlaci\u00f3n entre el grado de presencia medido por cuestionarios y par\u00e1metros de la velocidad de flujo sangu\u00edneo. 5) cada componente de la experiencia virtual tendr\u00e1 una influencia en las variaciones de velocidad observadas. para analizar las hip\u00f3tesis planteadas, se realizaron cuatro experimentos distintos, en los que se analiz\u00f3 la velocidad del flujo sangu\u00edneo durante: 1) distintas condiciones de navegaci\u00f3n, 2) distintas condiciones de inmersi\u00f3n, 3) una tarea de percepci\u00f3n visual y 4) tareas motoras para manejo de un joystick.  durante la tesis, se han propuesto distintas t\u00e9cnicas de procesado de se\u00f1al basadas en an\u00e1lisis espectral y en la obtenci\u00f3n de par\u00e1metros no lineales de la se\u00f1al, que no hab\u00edan sido utilizadas previamente en experimentos psicofisiol\u00f3gicos con dtc. Se ha observado que existe un incremento en la velocidad del flujo sangu\u00edneo durante la exposici\u00f3n a un ev, el cual puede deberse a distintos factores que intervienen en la experiencia: tareas de interacci\u00f3n visuoespacial, tareas de atenci\u00f3n, la creaci\u00f3n y ejecuci\u00f3n de un plan motor, cambios emocionales&#8230; Los an\u00e1lisis han mostrado que existen correlaciones significativas entre la velocidad media de flujo sangu\u00edneo en las arterias cerebrales medias durante la exposici\u00f3n al ev y respuestas a los cuestionarios de presencia utilizados.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Contributions to the development of objective techniques for presence measurement in virtual environments by means of brain activity analysis<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Contributions to the development of objective techniques for presence measurement in virtual environments by means of brain activity analysis <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Beatriz Rey Solaz <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Valencia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 26\/07\/2010<\/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>Mar\u00eda no Alca\u00f1iz Raya<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: cristina Botella arbona <\/li>\n<li>frank Biocca (vocal)<\/li>\n<li>jonathan Freeman (vocal)<\/li>\n<li>Jos\u00e9 Guti\u00e9rrez maldonado (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Beatriz Rey Solaz En esta tesis, se propone el uso de la t\u00e9cnica de doppler transcraneal (dtc) [&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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