High-gain subwavelength resonant cavity antennas based on metamaterial ground planes

Planar metarnaterial Surfaces with negative reflection phase values are proposed as ground planes in a high-gain resonant cavity antenna configuration. The antenna is formed by the metarnaterial ground plane (MGP) and a superimposed metallodielectric electromagnetic band gap (MEBG) array that acts as a partially reflective surface (PRS). A single dipole positioned between the PRS and the ground IS utilised as the excitation. Ray analysis is employed to describe the functioning of the antennas and to qualitatively predict the effect of the MGP oil the antenna performance. By employing MGPs with negative reflection phase values, the planar antenna profile is reduced to subwavelength values (less than lambda/6) whilst maintaining high directivity. Full-wave simulations have been carried out with commercially available software (Microstripes (TM)). The effect of the finite PRS size on the antenna radiation performance (directivity and sidelobe level) is studied. A prototype has been fabricated and tested experimentally in order to validate the predictions.

Spatio-temporal Rich Model Based Video Steganalysis on Cross Sections of Motion Vector Planes

A rich model based motion vector steganalysis benefiting from both temporal and spatial correlations of motion vectors is proposed in this work. The proposed steganalysis method has a substantially superior detection accuracy than the previous methods, even the targeted ones. The improvement in detection accuracy lies in several novel approaches introduced in this work. Firstly, it is shown that there is a strong correlation, not only spatially but also temporally, among neighbouring motion vectors for longer distances. Therefore, temporal motion vector dependency along side the spatial dependency is utilized for rigorous motion vector steganalysis. Secondly, unlike the filters previously used, which were heuristically designed against a specific motion vector steganography, a diverse set of many filters which can capture aberrations introduced by various motion vector steganography methods is used. The variety and also the number of the filter kernels are substantially more than that of used in previous ones. Besides that, filters up to fifth order are employed whereas the previous methods use at most second order filters. As a result of these, the proposed system captures various decorrelations in a wide spatio-temporal range and provides a better cover model. The proposed method is tested against the most prominent motion vector steganalysis and steganography methods. To the best knowledge of the authors, the experiments section has the most comprehensive tests in motion vector steganalysis field including five stego and seven steganalysis methods. Test results show that the proposed method yields around 20% detection accuracy increase in low payloads and 5% in higher payloads.

Licenciatura en Bibliotecología y Estudios de la Información, Planes de estudio

Licenciatura en Bibliotecología y Estudios de la Información (PROGRAMAS DE ESTUDIO) OPTATIVAS LIBRES OPTATIVAS DE TEMAS SELECTOS DE BIBLIOTECOLOGÍA OPTATIVAS HUMANÍSTICAS ANEXO PROGRAMAS DE ESTUDIO LAS ASIGNATURAS OPTATIVAS ANEXO PROGRAMAS DE ESTUDIO DE LAS ASIGNATURAS OBLIGATORIAS.

Formato entrega de planes de empresa al evaluador

Desarrollo empresarial y creación de empresa

Herramienta Documento de trabajo Evaluación planes de empresa

Desarrollo empresarial y creación de empresa

Procedimiento evaluación planes de empresa

Desarrollo empresarial y creación de empresa

Referentes conceptuales para evaluación de planes de empresa

Desarrollo empresarial y creación de empresa

Evaluación de la aplicación de planes parciales y reajuste del suelo en siete ciudades colombianas 2006-2013

Memorias de la presentación del estudio elaborado por Oscar Borrero y Magda Montaña, el cual analiza la gestión de los planes parciales en suelo de expansión y de renovación urbana en las ciudades de Bogotá, Medellín, Barranquilla, Bucaramanga, Pereira, Manizales e Ibagué.

Los Planes Parciales en Colombia, un problema de gestión. La Experiencia Española

Memoria de la presentación realizada por Fernando Navarro Ortiz en el marco del foro Planes Parciales en Colombia: "Un problema de gestión", en la cual expone la experiencia española en esta materia.

Evaluación de la aplicación de planes parciales y reajuste del suelo en siete ciudades colombianas 2006-2013

Presentación del resumen de la investigación elaborada por Oscar Borrero y Magda Montaña, con cifras de los planes parciales en suelo de expansión y de renovación urbana para las ciudades analizadas (Bogotá, Medellín, Barranquilla, Bucaramanga, Pereira, Manizales e Ibagué)

Desarrollo de un sistema matemático en la elaboración de planes de manejo sostenible en la sierra La Primavera, Jalisco, México

Tesis (Maestría en Ciencias Forestales) U.A.N.L.

Propuesta para la integración de un metasite como herramienta de apoyo a los planes de estudio de las preparatorias de la Vicerrectoria de enseñanza media y asuntos estudiantiles del ITESM

Tesis ( Maestría en Bibliotecología) U.A.N.L.