2012
Authors
Budke, GF; Montez, C; Moraes, R; Portugal, P;
Publication
2012 IEEE 17TH CONFERENCE ON EMERGING TECHNOLOGIES & FACTORY AUTOMATION (ETFA)
Abstract
In this paper is proposed a novel communication approach for implementation of parallel data fusion techniques in Wireless Sensor Networks. The approach is carried out by a distributed algorithm implemented in each network sensor node. In this approach, the network configures itself in order to adjust the number of messages sent periodically, establishing a tradeoff between the number of sent messages and the quality of data fusion (QoF). A prototype was implemented and experimental results show the effectiveness of this proposal.
2012
Authors
Couceiro, MS; Luz, JMA; Figueiredo, CM; Ferreira, NMF;
Publication
ROBOTICA
Abstract
This paper covers a wide knowledge of physical and dynamical models useful for building flying robots and a new generation of flying platform developed in the similarity of flying animals. The goal of this work is to develop a simulation environment and dynamic control using the high-level calculation tool MatLab and the modeling, simulation, and analysis of dynamic systems tool Simulink. Once created the dynamic models to study, this work involves the study and understanding of the dynamic stability criteria to be adopted and their potential use in the control of flying models.
2012
Authors
Brandao, RFM; Carvalho, JAB; Barbosa, FPM;
Publication
Proceedings of the Universities Power Engineering Conference
Abstract
The huge proliferation of wind farms across the world has arisen as an alternative to the traditional power generation and as a result of economic issues which necessitate monitoring systems in order to optimize availability and profits too. Equipments inside a wind turbine are subject to failures which, most of times lead to long downtime periods. When wind turbine is not running due to a failure, no profits are added and operation and maintenance costs increases. The development of advanced techniques to detect the onset of mechanical and electrical faults in wind turbines at a sufficiently early stage is very important for maintenance actions. Neural networks can be used to detect failures in some equipments of wind turbines, but to use them is necessary to create a model to the equipment under surveillance. The training of the neural network represents the big handicap of the developed method that will be presented here. However, after solving this problem, results are very interesting, and failures can be detected with several months in advance. © 2012 IEEE.
2012
Authors
Oliveira, C; Almeida, N; MacHado Da Silva, J;
Publication
Studies in Health Technology and Informatics
Abstract
Endoleaks are one of the major concerns in the long-term follow-up of endovascular aneurysm repair treatment (EVAR). Therefore, periodic monitoring is required to detect eventual damages in an implanted stent-graft. A monitoring system for post EVAR procedure based on inductive-coupling which avoids the need to resorting to more complex biomedical imaging systems is presented here. Endoleaks are detected with capacitive pressure sensors placed in the stent-graft and monitored externally after the measure of the oscillation frequency provided by the LC circuit created by sensors and inductive coupling.
2012
Authors
Ul Haq, I; Salgado, HM; Castro, JCS;
Publication
2012 9TH INTERNATIONAL CONFERENCE ON HIGH CAPACITY OPTICAL NETWORKS AND EMERGING/ENABLING TECHNOLOGIES (HONET)
Abstract
Burst loss is a critical issue in Optical Burst Switching (OBS) networks which restrains its deployment. This article presents a novel routing and wavelength assignment strategy for the Cooperative Clustered OBS (C2OBS) network architecture, to proactively avoid contention. In C2OBS, the network topology is divided into several manageable overlapping zones/clusters, with a Zone Head (ZH) node keeping an information base of zone resources. The ZH pre-computes a list of alternate k-shortest disjoint paths for every ingress-egress node pair within the zone. The ZH utilizes both the inferred knowledge about wavelength usage at the zone intermediate nodes and a novel poles apart heuristic for assigning wavelengths to incoming bursts. A route is selected among the pre-computed paths where the selected wavelength is available. As a result, traffic is balanced among the set of pre-computed routes, thus proactively reducing probability of contention. This strategy is called Resource Aware Routing (RAR) and Intelligent Wavelength Assignment (IWA).
2012
Authors
Nóbrega, R; Correia, N;
Publication
Proceedings of the International Working Conference on Advanced Visual Interfaces - AVI '12
Abstract
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