GEOMETRIC OPTICS

Author: GIL LLINAS JULIA.
Year: 2002.
University: EXTREMADURA [www.unex.es].
Place of defense: CENTRO UNIVERSITARIO DE MÉRIDA.
Place of preparation: FACULTAD DE CIENCIAS.

Summary: It has analyzed the theoretical framework that explains the existence of precepciones in physics and has proposed innovations teaching of specific interest in the teaching of physics and more specifically in the teaching of Optics. It has been developed and validated experimentally model on the teaching-learning Optics based on the theory of the development of Reigeluth and Stein supplemented by the proposed innovations, and has developed a teaching unit on the optics. It has been found experimentally goodness of the proposed model by comparing the results obtained by the experimental groups and control groups.

Author: VILLANUEVA LARRE ARANTZAZU.
Year: 2004.
University: NAVARRA [www.unav.es].
Place of defense: ESCUELA TÉCNICA SUPERIOR DE INGENIEROS INDUSTRIALES Y DE TELECOMUNICACIÓN.
Place of preparation: ETSII Y DE TELECOMUNICACIÓN UNIVERSIDAD PÚBLICA DE NAVARRA..

Summary: One of the areas least explored by researchers engaged in eye tracking technology (monitoring of sight) is designing models matamáticos based on physical parameters identifiable with the elements of the sistema.Concretamente the eye tracking systems based on video - oculografía socian images captured by the eye of a camera or other image acquisition system with the point observed by the user by means of mathematical expressions of general purpose linear or quadratic, based on ratios ciegos.El adjustment coefficients of the equations tracking is done through calibration procedures that cosisten in forcing the user to set the hearing at certain points in the pantalla.De this way the system is adjusted to the specific user and system configuration, at the expense of losing control over part of behavior intrinsic system vídeo-oculografía. It seems logical to assume that a model based on variables that describe the elements of the tracking system such as the eye, the screen, the camera or the illuminators will present a better comportamiento.La need to explore more deeply into the connections between the elements of the system , as well as the requirement of building a physical model, standing to construct mathematical models capable of describing the various elements of the system as well as to reflect different characteristics of their operation. The biggest advantage of this model respecrto to existing genetic models that allow greater control over the behavior of the system and provides prior knowledge on their sensitivity and precision possible mistakes among others. From the perspective of technology eye tracking major contributions of this thesis would be two:. The construction of a mathematical model for an eye tracking system that consists of a user looking at a screen and a camera that captures images of your eye using multiple sources iluminación.El model, based on physical variables, allows free movement of head, has about minimum calibration requirements and presents an accuracy comparable withthe other known systems with greater calibration requirements and more restrictions on the head. . Determining what characteristics of the image resolve the problem of seguimiento.Se has shown that the model based on the ellipse of the pupil and multiple reflections made by the tracking of a competent manner and meets the requirements deseados.Así, the minimum necessary hardware the system is also given.