Wireless Networks
Mostrando 13-24 de 195 artigos, teses e dissertações.
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13. Simulating a Multi-Vehicle Traffic Sensing System Based on Radio Tomographic Imaging
Abstract One of the most recently developed wireless technologies is Radio Tomographic Imaging (RTI). RTI employs a wireless sensor network that produces images of the change in the electromagnetic field of a monitored area using Received Signal Strength (RSS) measurements. This allows the tracking of device-free objects such as humans and cars. This paper i
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-12
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14. Artificial motor control for electrically stimulated upper limbs of plegic or paretic people
Introduction: Functional Electrical Stimulation (FES) is a technique used in the restoration and generation of movements performed by subjects with neuromuscular disorders such as spinal cord injury (SCI). The purpose of this article is to outline the state of the art and perspectives of the use of FES in artificial motor control of the upper limbs in pareti
Res. Biomed. Eng.. Publicado em: 14/06/2016
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15. Reliable Energy-Efficient Multilayer Mechanism with Realistic Battery Model and QoE Support in Wireless MANETs
Abstract Evolution in the telecommunications networks and the rapid advances made in wireless mobile communication networks, have taken computer networks to a new communication level. They now provide support for new mobile multimedia applications and are thus fostering the development of new network types and configurations. MANET is an important configurat
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-03
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16. Wi-Bio: management policy aimed at the establishment of networks for patient monitoring using IEEE 802.11
INTRODUCTION: Patient monitoring will tend to decline in the coming years due to a shortage of physical and human resources in hospitals. Therefore, several studies define alternatives to improve patient monitoring using wireless networks. In these studies, a wireless network is used to transfer data generated by medical sensors without interacting with the
Rev. Bras. Eng. Bioméd.. Publicado em: 2014-06
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17. New strategies for planning and performance evaluation of wireless networks: case studies based on the cross-layer approach
The use of wireless local area networks, called WLANs, as well as the proliferation of the use of multimedia applications have grown rapidly in recent years. Some factors affect the quality of service (QoS) received by the user and interference is one of them. This work presents strategies for planning and performance evaluation through an empirical study of
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-06
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18. Architecture for ES Receiver Systems Targeted at Commercial Wireless Communications
ABSTRACT: Modern electronic support (ES) systems are descended from systems intended for the detection of small numbers of high-power radar systems, and are thus not suitable for the low-power transmitters and dense signal environments typical of commercial communication networks. A new ES-system architecture is proposed to allow the detection of large numbe
J. Aerosp. Technol. Manag.. Publicado em: 2013-03
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19. MÃtodo para avaliaÃÃo de aspectos de camada fÃsica e MAC de redes 802.11. / Method to evaluate physical and MAC layer aspects of 802.11 networks.
The present dissertation proposes a 802.11 network evaluation sequence which can be adopted, independently of the equipment used at the network. The log-distance path loss model is used for the environment characterization (by the model β parameter) where the network is evaluated. The specific objectives of each evaluation stage are presented and contex
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2012
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20. Algoritmo de escalonamento DRR com quantum adaptativo para o tráfego downlink de redes IEEE 802.16j / DRR adaptive quantum scheduling algorithm for downlink traffic of IEEE 802.16j networks
IEEE 802.16j networks provide, through the Relay Station (RS), improvements with regard to previous specifications of WiMAX in terms of increased coverage area, reduction of deployment costs due to low cost of RS compared to a Base Station (BS) and system average throughput increase. Its main purpose is to meet demands for wireless broadband access at lower
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/10/2012
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21. Análise de desempenho baseada em simulação de redes WirelessHART
Esta dissertação descreve a implementação de um módulo de simulação para redes WirelessHART, utilizando o simulador de redes Network Simulator 3, tendo em vista a aceitação que ambos possuem no atual contexto de pesquisa e na indústria. Para validação do módulo foram implementados testes quanto a atenuação dos sinais transmitidos, probabilidad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/08/2012
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22. HoneypotLabsac: um Framework de Honeypot Virtual para o Android / HoneypotLabsac: a Framework of Virtual Honeypot for Android
Mobile devices such as Smartphones, have become indispensable nowadays, due their increased processing power, more room for data storage, batteries with greater time autonomy, connection to wireless networks and 3G networks. . The Android Operating System is a complete platform for mobile devices principally for Smartphones developed by Google in 2008. It is
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/06/2012
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23. Sistema embarcado para estimação de torque, velocidade e eficiência em motores de indução / EMBEDDED SYSTEM FOR ESTIMATION OF TORQUE, SPEED AND EFFICIENCY IN INDUCTION MOTORS
O trabalho proposto visa monitorar em tempo real grandezas importantes em motores de indução trifásicos de forma pouco invasiva. Foi desenvolvido um método de estimação de torque, velocidade no eixo e eficiência energética. Um sistema embarcado foi construído para a aquisição de sinais elétricos do motor e processamento local. Os valores calculad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/01/2012
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24. Instrumentalização de redes de sensores sem fio. / Instrumentation of wireless sensor networks.
Este trabalho apresenta um estudo da instrumentalização de software em Redes de Sensores Sem Fio, complementado pela aplicação, em um estudo de caso, de uma instrumentalização. A proposta da instrumentalização visa ampliar o conhecimento sobre essas redes em termos de desempenho, permitindo ao usuário tomar decisões suportadas pelo instrumento. Nes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2011