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This article describes an application proposal since the analysis till the development of a software, which presents itself as a solution to the existent management problem in the Electronics Store in the Engineering Department of University of Tras-os-Montes and Alto Douro. The study as followed a development methodology intrinsic to the problem and to all the features associated to management systems, with the main purpose to obtain a suitable solution by means of Information Technologies capable to support the users in the management of all services and resources of the store in a way completely integrated with the information systems that are more relevant to teaching activity. The solution was developed using Web technologies, enabling an optimized channel for accessing and managing all services and products provided by the store, increasing their efficiency, organization and ability to respond to requests made by all users.

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Distributed Embedded Systems are subject to transient communication faults that need being detected and mitigated in safety-critical scopes. This paper addresses error recovery in time-triggered systems based on the Controller Area Network (CAN). It extends a recent work that proposed using online traffic scheduling, combined with servers, to implement dynamic message retransmissions. In particular, we provide a schedulability analysis that considers the interference of the error-recovery server in the time-triggered traffic, as well as a methodology to compute the worst-case response time of messages affected by errors. We also present a comparison with related error-recovery methods that confirms the superiority of the proposed method. © 2013 IEEE.

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We consider a current-carrying wire loop made out of linear segments of arbitrary sizes and directions in three-dimensional space. We develop expressions to calculate its vector potential and magnetic field at all points in space. We then calculate the mutual inductance between two such (non-intersecting) piecewise-linear loops. As simple applications, we consider in detail the mutual inductance between two square wires of equal length that either lie in the same plane or lie in parallel horizontal planes with their centers on the same vertical axis. Our expressions can also be used to obtain approximations to the mutual inductance between wires of arbitrary three-dimensional shapes. (C) 2013 American Association of Physics Teachers.