Identification of temperature profile and heat transfer on a dielectric membrane for gas sensors by `COSMOS' program simulation

The application of commercial 3-D software `COSMOS' for the design and thermal analysis of the low power consumption test structures with dielectric membrane for gas microsensors is presented. Within this work, the simulation provides the estimation of the temperature profile on the active area and the whole membrane including the four bridges and the heating efficiency in the temperature range 20-500 °C. Unravelling of the heat loss mechanisms in terms of radiation, convection, conduction by air and solid materials during heat transfer on the dielectric membrane is reported for the first time as a mean to evaluate by 3-D simulation the contribution of technological processes and lay-out design to the total heat losses

A 3D Smith Chart based on the Riemann Sphere for Active and Passive Microwave Circuits

“© © 20xx IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”This letter proposes a spherical 3-D Smith Chart suitable for representing both active and passive microwave circuits. Using the mathematical concept of the Riemann sphere, the extended reflection coefficient plane is transformed into the surface of the unit sphere. Since the proposed Smith Chart compiles the whole complex plane, all possible loads are included. A simple graphic tool is thus obtained that successfully unifies active and passive circuits. In addition, lossy lines with complex characteristic impedances can also be represented. The letter presents the 3-D Smith Chart, provides its main governing equations, and also enumerates its more important properties. © 2011 IEEE.This work was supported in part by the POSDRU ID 7713 European Project and by the Ministerio de Ciencia e Innovacion, Spanish Government under Research Project TEC2010-21520-C04-01.Muller, AA.; Soto Pacheco, P.; Dascalu, D.; Neculoiu, D.; Boria Esbert, VE. (2011). A 3D Smith Chart based on the Riemann Sphere for Active and Passive Microwave Circuits. IEEE Microwave and Wireless Components Letters. 21(6):286-288. https://doi.org/10.1109/LMWC.2011.2132697S28628821

Classification of Russian textbooks by grade level and topic using ReaderBench

This article analyzes automated methods for classifying Russian-language textbooks in two dimensions, and precisely on the topic of the text and its complexity, reflected by the corresponding school level (class

Software Requirements Specification of A University Class Scheduler

The University Class Scheduler (UCS) presented in this paper is a novel scheduling tool intended to be used by universities to schedule classes into classrooms. In essence, UCS allows university administrators to enter relevant college and building information, schedule the input classes (courses) into input classrooms, and create web pages that provide detailed schedule information on a semester-by-semester basis. The UCS, which performs the scheduling of classes according to a number of user-selected parameters, can be easily adapted for applications outside the academic realm. This paper presents the main aspects of the University Class Scheduler’s UML-based specification, gives details of the UCS’ current development status, and points to a series of possible extensions that we intend to investigate in the near future

The role of endothelium in covid-19

The 2019 novel coronavirus, known as severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2) or coronavirus disease 2019 (COVID-19), is causing a global pandemic. The virus primarily affects the upper and lower respiratory tracts and raises the risk of a variety of non-pulmonary consequences, the most severe and possibly fatal of which are cardiovascular problems. Data show that almost one-third of the patients with a moderate or severe form of COVID-19 had preexisting cardiovascular comorbidities such as diabetes mellitus, obesity, hypertension, heart failure, or coronary artery disease. SARS-CoV2 causes hyper inflammation, hypoxia, apoptosis, and a renin–angiotensin system imbalance in a variety of cell types, primarily endothelial cells. Profound endothelial dysfunction associated with COVID-19 can be the cause of impaired organ perfusion that may generate acute myocardial injury, renal failure, and a procoagulant state resulting in thromboembolic events. We discuss the most recent results on the involvement of endothelial dysfunction in the pathogenesis of COVID-19 in patients with cardiometabolic diseases in this review. We also provide insights on treatments that may reduce the severity of this viral infection

Case study on measuring the level of stress in the academic environment in France

The study is a novelty because was elaborated on a group of students in the academic environment in France. Following the documented steps, I have noticed that several questionnaires have been used in order to identify stress levels in the academic environment. The case study presented in this article consists in a questionnaire meant to identify stress factors. There are several factors that are likely to cause stress: changes to routine, time pressure, difficult tasks, too much homework’s, financial state, sleep schedule and physical work conditions. I believe that stress management results could be visible if we can motivate people to adjust their behavior and life styl