Cellular Ip
Mostrando 25-36 de 132 artigos, teses e dissertações.
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25. Análise de Desempenho de Redes TCP sem Fio / Performance analysis of wireless TCP networks
The TCP/IP networks were designed considering the use of wired media. Although, the huge growth of the Internet together with the growth of the wireless transmissions caused the need of insertion of TCP in this new scenario. As some of the wireless networks characteristics are harmful to the standard TCP, as the higher bit error rates, the intermittent signa
Publicado em: 2006
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26. ANÁLISE DE TRANSMISSÃO DE VOZ EM MODO PACOTE NAS REDES CELULARES EGPRS / ANALYSIS OF THE VOICE TRANSMISSION ON PACKET MODE OVER EGPRS NETWORKS
Atualmente, há uma demanda crescente por serviços que exploram a integração entre as tradicionais redes de pacotes (como a Internet) e as redes celulares de última geração. Além das aplicações que visam ao transporte de dados em si, há linhas de pesquisa no sentido de oferecer serviços de voz sobre IP em redes celulares, ou seja, explorando o par
Publicado em: 2006
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27. TÉCNICAS PARA A MELHORIA DE DESEMPENHO DA TRANSMISSÃO DE VOZ NO SISTEMA UMTS / TECHNIQUES FOR VOICE TRANSMISSION IMPROVEMENT IN UMTS SYSTEMS
With the advent of multimedia traffic, Third Generation mobile systems were introduced, with the UMTS as the most promissor candidate. In consonance with the global trend of utilization of the IP technology in fixed networks, the UMTS developers decided to incorporate this protocol, which presents more facilities for the introduction of new services. Therefo
Publicado em: 2006
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28. Caracterização morfofuncional da ototoxicidade por cisplatina em ratos: avaliação do papel da apoptose e da otoproteção por amifostina / Morfofuncional characterization of the ototoxicidade for cisplatina in rats: evaluation of the paper of apoptose and the otoproteção for amifostina
Cisplatin (cis-diamminedicloroplatinum) is an antineoplastic drug frequently used in the treatment of a variety of cancers, specially the head-and-neck cancer. Ototoxicity, however, has been noted as a common side-effect of cisplatin, which may lead to significant interruptions in treatment, possibly impacting on local tumor control and patient survival. The
Publicado em: 2006
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29. Omega-3 and omega-6 fatty acids, dimethylsulfoxide and ternatin on hepatic regeneration and oxidative stress in rats / Ácidos graxos ômega-3 e ômega-6, dimetilsulfóxido e ternatina na regeneração hepática e no estresse oxidativo em ratos
The liver exhibits a remarkable regenerative capacity after tissue damage, including partial hepatectomy. Reactive oxygen species and lipid peroxidation have been implicated as control mechanisms of cellular growth and proliferation. Dimethylsulfoxide (DMSO) and ternatin (TRT), known free radical scanvengers, and the w-3 and w-6 polyunsaturated fatty acids (
Publicado em: 2006
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30. EFFICIENT FEATURES AND INTERPOLATION DOMAINS IN DISTRIBUTED SPEECH RECOGNITION / ATRIBUTOS E DOMÍNIOS DE INTERPOLAÇÃO EFICIENTES EM RECONHECIMENTO DE VOZ DISTRIBUÍDO
Com o crescimento gigantesco da Internet e dos sistemas de comunicações móveis celulares, as aplicações de processamento de voz nessas redes têm despertado grande interesse . Um problema particularmente importante nessa área consiste no reconhecimento de voz em um sistema servidor, baseado nos parâmetros acústicos calculados e quantizados no termina
Publicado em: 2005
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31. Performance analysis of 2G, 2.5G and 3G cellular mobile systems / Analise de desempenho dos sistemas moveis celulares 2G, 2,5G e 3G
Este trabalho de tese estuda e analisa o desempenho dos sistemas móveis celulares GSM de segunda geração (2G), GPRS de segunda geração intermediária (2,5G) e CDMA2000 de terceira geração (3G). Na primeira parte deste trabalho de tese são avaliadas estratégias de compartilhamento dos canais de comunicação utilizados pelos sistemas GSM e GPRS, em b
Publicado em: 2005
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32. Study of participation of nitric oxide about acute cellular migration in the arthritis and peritonitis induced by zymosan or lipopolysaccharide in experimental models / Estudo da participação do óxido nítrico na migração celular aguda na artrite e peritonite induzidas por zymosan ou lipopolissacarídeo em modelos experimentais
Cell influx (CI) to synovium participates in physiopathology of rheumatoid arthritis (RA). There are controversies about the nitric oxide (NO) action in modulation of neutrophil influx to inflammatory sites, with NO decreasing or increasing it. This study investigated the effect of nitric oxide synthase (NOS) inhibitors on acute CI in animals submitted to ar
Publicado em: 2005
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33. Interactions between intracellular Ca2+ stores: Ca2+ released from the NAADP pool potentiates cADPR-induced Ca2+ release
Cells possess multiple intracellular Ca2+-releasing systems. Sea urchin egg homogenates are a well-established model to study intracellular Ca2+ release. In the present study the mechanism of interaction between three intracellular Ca2+ pools, namely the nicotinic acid adenine dinucleotide phosphate (NAADP), the cyclic ADP-ribose (cADPR) and the inositol 1',
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-05
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34. PERFORMANCE EVALUATION OF MICROMOBILITY PROTOCOLS IN IP NETWORKS / ANÁLISE DE DESEMPENHO DE PROTOCOLOS DE MICRO-MOBILIDADE PARA REDES IP
Since some years ago the Internet is continually grwoing in importance in the peoples life, even for work, amusement, information or businesses. That spread is making the need for access goes outside the office or the home and reach the free air, the people would like to access Internet of his/her notebook while they are in their path for the work, home or s
Publicado em: 2002
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35. UM FRAMEWORK PARA PROVISÃO DE QOS EM REDES MÓVEIS SEM FIO / A FRAMEWORK FOR QOS PROVISIONING IN WIRELESS MOBILE NETWORKS
In the last decades, increasing interest has been observed in technologies related to wireless mobile communication environments. Great part of such interest follows the growth in the telecommunications industry, more specifically of cellular mobile telephony systems. Users are quickly absorbing these technologies and generating new necessities, such as the
Publicado em: 2002
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36. Indução de danos Oxidativos em celulas de mamifero por isoproterenol e cobre
Isoproterenol (IP) is a synthetic catecholamine of great pharmacological interest, as it is the most potent B-adrenergic known agonist. Recent works revealed the involvement of IP oxidation reactions in cardiotoxicity mechanisms. Copper is an essential microelement which has a fundamental role in living organisms metabolism. In high concentration copper is e
Publicado em: 2001