Politecnica Salesiana University

About: Politecnica Salesiana University is a education organization based out in Cuenca, Ecuador. It is known for research contribution in the topics: Computer science & Population. The organization has 2102 authors who have published 1847 publications receiving 7665 citations.

Ascenso y Desgaste de la Participación Ciudadana en Ecuador

Abstract: En el texto se analizan los tres momentos del proceso de institucionalizacion de la participacion ciudadana en Ecuador. Primero, sus inicios en los anos noventa con una fragil institucionalizacion en la esfera publica no estatal y en los gobiernos locales. Luego, en el periodo progresista, la institucionalizacion se expandio en el aparato estatal con una enorme normativa procedimental que derivo en cooptacion gubernamental. Por ultimo, con la transicion del progresismo vinculada a la corrupcion publica, se profundizo la crisis institucional de la participacion.

Buen vivir y educación para la práctica de la interculturalidad en el Ecuador. Otras prácticas pedagógicas son necesarias

Abstract: En este articulo se aporta a la reflexion sobre el Buen Vivir respecto a la educacion en el Ecuador y se analizan las posibilidades reales para una educacion en la construccion de una sociedad mas justa y equitativa, donde la diferencia se viva con igualdad y dignidad. Una educacion para la sociedad del Buen Vivir. Se plantea como posibilidad una educacion para practica de la interculturalidad donde entren en juego otras epistemologias, otros saberes, otras formas de ser y de comprender el mundo; otras formas de aprender y de vivir. Se plantea pensar la educacion desde racionalidades diferentes, muchas veces subarternizadas a la racionalidad occidental moderna, tradicionalmente vista como la unica verdadera y legitima. Pensar en otra educacion, supone reconocer y aprender de las experiencias existentes en el Ecuador en educacion intercultural y en educacion y diversidad cultural. Para ello, otras pedagogias son necesarias, se trata de pedagogias para la transformacion social, pedagogias de la pertinencia y de la autonomia, pedagogias de las resistencias, de la emancipacion, de la liberacion y del dialogo en condiciones de igualdad, pedagogias respetuosas de la diferencia, no homogenizantes, de liberacion y de transformacion. Estas otras pedagogias exigen practicas educativas creativas y de mayor creatividad docente; requieren de la participacion de la comunidad educativa y generacion de politicas publicas para transformar las situaciones de inequidad y exclusion. Son finalmente, pedagogias de la esperanza.

Experimental evaluation of a NG-PON2 network

Abstract: The next generation passive optical network, stage 2 (NG-PON2) constitute milestone in the optical access networks evolution. Currently the requirements of its physical layer, such as a 40 Gb/s of upstream/downstream capacity, using a hybrid WDM-TDM technology with reliability and efficiency in bandwidth and power consumption. The NG’PON2 standard also demand an Optical Distribution Network (ODN) backward compatibility with previous ITU-T PON standards. In this paper we provide a comprehensive way to understand NG-PON2 improvements and present an experimental demonstration of a NG-PON-2 compliant network deployment, employing BER and Optical Path Penalty (OPP) measurements, in order to verify the performance of different inter-channel spacing variations for determining its impact in the data transmission. Results show that there is a 3 dB penalty when using 0.2 nm of inter-channel spacing with respect to a 0.4 nm of inter-channel spacing.

A Novel Hybrid Fractal Antenna Design for Ultra-Wideband Application

Abstract: In this article, the up-to-date design of an antenna in the shape of Chakana, “Andes Cross” or “Inka Cross” will be presented and meticulously analyzed. The design base-structure is a planar monopole that goes along with different modifications related to fractal geometry concepts due to its main properties miniaturization, operability, self-similarity, and space-filling. The utilization of the second iteration of Koch fractal in the ground plane and Sierpinski second iteration in the patch allows an improvement of the Ultra-Wideband (UWB)characteristics by acquiring reflection in all of the 3.1 to 10.6 GHz range designated by the Federal Communications Commission (FCC). In order to improve the reflection present in high frequencies a ground-plane Notch is used; furthermore, so as to reject the frequency band considered for IEEE 802.11A, WLAN-HIPERLAN/2 and the Industrial, Scientific and Medical band (ISM band)located between 5.15 and 5.82 GHz, the implementation of an H-shaped Notch filter on the patch is carried out. The dimensions optimized for this fractal antenna are 30mmx33mm, mounted on an FR4 substrate with dielectric constant $\varepsilon r=4.4$ , a thickness of h=1.5 and a tangent of losses of (j=O.02, obtaining a bandwidth of 3.25 to 11.36 GHz with a VSWR<2 over the entire frequency range except for the rejected frequencies for ISM. Also, the H-Shaped Notch filter with an effective length of approximately 23.14 mm is positioned around of 4 mm from the feed line to ensure an optimal rejection of −4.85 dB at the center frequency of 5.41 GHz. Therefore, based on the combination of the fractal geometries Koch and Sierpinski proposed, a new Hybrid Fractal Antenna Design for UWB application with a nearly omnidirectional radiation pattern, adequate 50 impedance and good return loss less than −10dB over the entire UWB range is presented.