Mobile Communication System
Mostrando 13-24 de 54 artigos, teses e dissertações.
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13. Design of CAN-based distributed control systems with optimized configuration
A current trend in distributed control systems is the application of communication networktechnologies such as CAN - Controller Area Network. A recent utilization approach ofthese technologies is the networked control systems (NCS). The fundamental challenges inthe development of NCS are the analysis of the network delay effects and the prediction of the tim
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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14. Uma arquitetura de controle de qualidade de serviço aplicada a redes heterogêneas e serviços convergentes. / An architecture for QoS control applied to heterogeneous networks and convergent services.
One of the targets of the next generation communication systems is to provide access to any service, to any user, anytime, anywhere, regardless the access network technology or type of user device (mobile phone, PDA, personal computer, and so on). This scenario is called convergence of services by heterogeneous networks, and in such scenario quality of servi
Publicado em: 2010
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15. Biomedic data visualization on mobile devices / Visualização genérica de sinais e dados biomédicos em dispositivos móveis
The objective of this work is to develop a system for visualization of biomedical signals in a generic way. The proposed system uses the SOA architecture to access data and biomedical signals of patients. The display of signals proposed in this paper proves to be effective for devices with a small screen resolution. The implementation of Web services based o
Publicado em: 2009
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16. DIRCE - Design da Interação e Levantamento de Requisitos com Foco na Comunicação e Exploração de Ideias: Experiências de Uso Aplicadas em Sistemas de Criação de Conteúdo para a Televisão Digital / DIRCE - Design da interação e levantamento de requisitos com foco na comunicação e exploração de ideias : experiências de uso aplicadas em sistemas de criação de conteúdo para a televisão digital
This paper aims to present a methodology for helping professionals to focus on aspects of interaction from the early stages of the process of developing an innovative system. The methodology guides the application of techniques aimed at the requirements gathering and design of the interaction of such a system, considering the experiences of users and the mod
Publicado em: 2009
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17. Aplicação comercial do sistema omnisat da autotrac e qualcomm com o uso de terminais móveis e análise de técnicas de múltiplo acesso em sistemas via satélites
The purpose of this work is to show the OmniSAT system of data mobile communication and tracking vehicles of Autotrac, applied to vehicles fleet market. The OmniTRACS system was developed in the United States by Qualcomm Incorporated and implements, besides security and logistic, also bi-directional mobile communications applied to government and utilities m
Publicado em: 2008
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18. Interoperabilidade dos dispositivos móveis / Interoperabilidade dos dispositivos móveis / Device móbiles interoperability / Device móbiles interoperability
The concept of sharing computing resources among WEB participants, has been gradually extended to support scenarios in wireless world, networks, mobile devices which introduce a variety possible uses. Wireless devices become a key of sharing information among peoples. In this point of view we present the main challenges in pervasive/ubiquitous concepts for w
Publicado em: 2008
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19. Desenvolvimento de sistema de monitoramento de produção avicola utilizando rede de sensores sem fio / Development of monitoring system of poultry production using wireless sensor network
It is increasingly necessary to optimize the agricultural production due to environmental or economic pressures imposed by global markets. Aiming at increasing the efficiency of agricultural production come the need to exert greater control in the procedures adopted, especially in poultry barns. The development of control and monitoring systems based on Wire
Publicado em: 2008
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20. Multi-SincronizaÃÃo em menssage sequence charts
Message Sequence Charts (MSC) is a visual trace language, extensively used in academy and industry, to describe the communication behavior of system components and their environment. The MSC syntax and semantics are now a standard defined by the International Telecommunication Union (ITU). The motivation for this work has originated from an eort to model sce
Publicado em: 2008
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21. A VPN (Virtual Private Network) design based on reconfigurable computing and applied to mobile robots / Projeto de uma VPN(Rede Privada Virtual) baseada em computação reconfigurável e aplicada a robôs móveis
This work designs a system that implements a VPN using FPGA (Field Programmable Gate Array) reprogrammable circuits, which are the basis of reconfigurable computing. VPNs use cryptography to allow private communication between parts. In this manner, the computational cost of the cryptography is handled by the hardware, achieving great performance and allowin
Publicado em: 2007
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22. O homem-placa e o pixman: uma análise de duas ferramentas publicitárias que utilizam o corpo como suporte midiático / The placardman and the pixman: a study on two marketing tools which make use of the human body as media aid
The present research is about the placardman and the pixman, two marketing tools which make use of the human body as media aid. The sandwichmen men, rarely women walk around the streets of commercial centers in big cities draped in two wooden placards, announcing several products and services such as the selling of gold or the buying of subway and employee m
Publicado em: 2007
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23. Aplicações de antenas adaptativas em sistemas de comunicações móveis / Applications of adaptive antennas in wireless communications systems
The increasing demand for wireless communications services has demanded the development of technologies that allow serving a bigger amount of users without increasing the bandwidth used today. It also has an increasing demand for services that need high transmission rates on mobile terminal, as Internet and video transfer. On the other hand, the user desires
Publicado em: 2007
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24. A service-based access selection algorithm for always best connected networks
It is expected that future wireless systems will consist of several distinct radio access technologies, such as WCDMA/HSDPA, GSM/EDGE/GPRS, WLAN and others, forming a mobile multi-access system offering advanced multimedia services. Together with the evermore availability of user terminals capable of operating with more than one communication technology, use
Publicado em: 2007