Air quality trend and proposal of a web application for the atmospheric monitoring network in Tabasco, México.

Abstract

In this paper, an analytical stability model for quantum square-shaped extended source P-N-P-N tunneling field-effect transistor (P-N-P-N TFET) with silicon carbide substrate is developed that includes the effects of gate-source capacitance, gate-drain capacitance, effective gate resistance, time constant and transconductance. A nonquasistatic RF small-signal model has been used and stability that was extracted from analytical equations of its Y-parameters. The obtained analytical expression for stability is compared with device simulation results and excellent agreement is found up to 100 GHz. The stability performance of a quantum square-shaped extended source P-N-P-N TFET with silicon carbide substrate is also studied analytically considering pocket width and doping variation. The results strongly confirm that the proposed model is accurate and suitable for the quantum square-shaped extended source P-N-P-N TFET in the high-frequency regime.

Network evolution in theory and as observed, the case of the Industrial Knowledge Bank of Latin America

“…However, the following analysis is based on research that the [1] conducted over a five-year period (2009-2013) and that covers the sectors of mining, agronomic industry, trade capacity building , and energy and the environment. Network theory is broadly used to study many systems including network performance of computer architectures [10], air quality of cities [11], Bayesian Newtworks structures, and social networks [12]. The main objective of this paper is to apply the preferential attachment model to the analysis of the social network dynamics of the IKB.…”

An Overview of Experiences Made and Tools Used to Inform the Public on Ambient Air Quality

“…In Magaña Villegas [19], a web portal was designed as a proper tool for the communication of air quality in the framework of a study on the air quality conducted in Villahermosa, Tabasco, southeast of Mexico City. The site is meant to provide information both to the academic community and to the population, with the aim to protect them from high levels of pollution.…”