Automatic moving object detection and tracking is very important task in video surveillance applications. In the present work the well known background subtraction model and use of Gaussian Mixture Models have been used to implement a robust automated single object tracking system. In this implementation, background subtraction on subtracting consecutive frame-by-frame basis for moving object detection is done. Once the object has been detected it is tracked by employing an efficient GMM technique. After successful completion of tracking, moving object recognition (...) of those objects using well known Principal Component Analysis, which is used for extracting features and Manhattan based distance metric is used for subsequent classification purpose. The system is capable of handling entry and exit of an object. Such a tracking system is cost effective and can be used as an automated video conferencing system and also has applications like human tracking, vehicles monitoring, and event recognition for video surveillance. The proposed algorithm was tested on standard database on complex environments and the results were satisfactory. (shrink)

Este artículo pasa revista a las principales contribuciones de Víctor Sánchez de Zavala a la lingüística y a la filosofía, a traves del análisis de las ideas centrales de su pensamiento expuestas en sus libros y artículos. Despues de una breve introdueción a su biografía académica, se analiza y explica el papel esencial que Víctor Sánchez de Zavala tuvo en la introducción de la gramatíca generativa en España. Se examina en este sentido su trabajo corno profesor, editor, traductor y escritor (...) y la Iínea central de su trabajo lingüístico. La segunda parte del artículo analiza las hipótesis fundamentales de la teoda pragmática desarrollada por este filósofo y lingüísta a lo largo de toda su vida. En esta sección, por otra parte, se presenta y discute su novedoso enfoque global de la actividad lingüística expuesta en su obra póstuma, de reciente aparieión: Hacia la pragmática (psicoIógica), Madrid, Visor.This paper reviews Víctor Sánehez de Zavala’s main contributions to linguistics and philosophy through a close look at the central ideas developed in his articles and books. In the first part, after a brief introduction to his academic biography, the leading role of Víctor Sánchez de Zavada in the introduction of formal linguistics in Spain is analysed and justified. His work as editor, professor, translator and writer is examined through his main publications. The second part of the paper is devoted to provide an analysis of the central hypotheses on which this theory of psychologicaI pragmatics is based. Furthermore, this second part examines his novel and global approach to linguistic activity, developed in his posthumous book Towards a psychological pragmatics. (shrink)

One method for investigating the neurobiology of consciousness is to experimentally manipulate consciousness as a variable and then visualize the resultant functional brain changes with advanced imaging techniques. To begin investigation into this area, healthy volunteers underwent positron emission tomography scanning while listening to randomized word lists in both conscious and unconscious conditions. Following anaesthesia, subjects had no explicit memories. Nonetheless, subjects demonstrated implicit memory on a forced-choice test . These subsequent memory scores were correlated with regional brain metabolism measured (...) during encoding. Conscious recall and unconscious recognition memory demonstrated considerable anatomic overlap in correlating significantly with relative glucose metabolism in auditory verbal memory areas. However, only conscious recall correlated with mediodorsal thalamic nucleus activity; unconscious recognition memory did not. These findings suggest that conscious versus unconscious memory distinctions may depend on the presence or absence of correlated thalamic activity, and directly implicate the thalamus in the neurobiology of consciousness. (shrink)