Examinando por Autor "Rueda Ruiz, Antonio J."
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Ítem A System for the Measurement of the Subjective Visual Vertical Using a Virtual Reality Device(Springer Nature, 2018-05) Negrillo Cárdenas, José; Rueda Ruiz, Antonio J.; Ogáyar Anguita, Carlos J.; Lomas Vega, Rafael; Segura Sánchez, Rafael J.The Subjective Visual Vertical (SVV) is a common test for evaluating the perception of verticality. Altered verticality has been connected with disorders in the otolithic, visual or proprioceptive systems, caused by stroke, Parkinson’s disease or multiple sclerosis, among others. Currently, this test is carried out using a variety of specific, mostly homemade apparatuses that include moving planes, buckets, hemispheric domes or a line projected in a screen. Our aim is to develop a flexible, inexpensive, user-friendly and easily extensible system based on virtual reality for the measurement of the SVV and several related visual diagnostic tests, and validate it through an experimental evaluation. Our evaluation showed that the proposed system is suitable for the measurement of SVV in healthy subjects. The next step is to perform a more elaborated experimentation on patients and compare the results with the measurements obtained from traditional methods.Ítem Multilayer representation for geological information systems(Jaén : Universidad de Jaén, 2019-09-19) Graciano Segura, Alejandro; Rueda Ruiz, Antonio J.; Feito Higueruela, Francisco R.; Universidad de Jaén. Departamento de InformáticaEn esta tesis se propone el uso de la Representación de Terrenos Basada en Stacks (SBRT, de sus siglas en inglés) para datos geológicos volumétricos. Esta estructura de datos codifica estructuras geológicas representadas como stacks utilizando una compacta representación de datos. A continuación, hemos formalizado la SBRT con un esquema basado en la teoría de geo-átomos para proporcionar una definición precisa y determinar sus propiedades. Esta tesis también introduce una nueva estructura de datos llamada QuadStack, mejorando los resultados de compresión proporcionados por la SBRT al aprovechar la redundancia de información que a menudo se encuentra en los datos distribuidos por capas. También se han proporcionado métodos de visualización para estas representaciones basados en el conocido algoritmo de visualización raycasting. Al mantener los datos en todo momento en la memoria de la GPU de forma compacta, los métodos propuestos son lo suficientemente rápidos como para proporcionar velocidades de visualización interactivas.Ítem VR‐OCKS: A virtual reality game for learning the basic concepts of programming(Wiley, 2020-01) Segura Sánchez, Rafael J.; del Pino, Francisco J.; Ogáyar Anguita, Carlos; Rueda Ruiz, Antonio J.This paper presents a prototype of a virtual reality system to teach the basic concepts of programming called VR-OCKS. The system is inspired by other visual languages such as Scratch or Kodu, and it works by proposing to the user the resolution of simple puzzles in a 3D environment. Several basic commands to a humanoid character, such as advance or turn, together with control flow structures like iteration and conditional selections, are needed to provide a solution for increasingly difficult challenges. Our aim is to attract users, usually children and teenagers, into the world of programming by taking advantage of the appeal and potential of Virtual Reality. In addition to the skills enhanced by educational programming languages, like common sense, creative thinking or systematic reasoning, others such as spatial orientation, autonomy or manual skills are also strengthened. Our experiments with adult and children users have shown a very good acceptance and great potential as educational tool.