Opportunistic Communication
Mostrando 1-12 de 16 artigos, teses e dissertações.
-
1. BlueYou: uma plataforma de comunicação ciente de contexto baseada em serviços para computação móvel
O crescente número de dispositivos móveis com capacidade computacional elevada e suporte a diferentes tecnologias de transmissão sem fio tem motivado a criação de serviços de comunicação capazes de fornecer informações aos usuários a qualquer momento e em qualquer lugar. Particularmente, nota-se a existência maciça de dispositivos equipados com
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/04/2011
-
2. Uma arquitetura de comunicação oportunística
Mobile computing devices often present high processing power and include several wireless network interfaces. 4G networks promise to provide a unified IP based infrastructure with QoS and security support for the communications using such devices. Transmission delays, and network disruptions, however, are often common when considering the current transmissio
Publicado em: 2010
-
3. Throughput analysis in opportunistic networks / Um estudo de vazão em redes oportunistas
A evidente subutilização dos recursos de freqüência tem incentivado discussões e trabalhos visando propor uma transformação no uso do espectro. O acesso oportunista ao espectro é uma proposta bastante atraente nessa busca pelo uso mais eficiente dos recursos de freqüência e propõe o compartilhamento do espectro por redes licenciadas e redes oportu
Publicado em: 2009
-
4. Manipulation of accounting information: a theoretical and empirical analysis on the operational models of earnings management detection / Manipulação das informações contábeis: uma análise teórica e empírica sobre os modelos operacionais de detecção de gerenciamento de resultados
This research aims to investigate the theoretical and empirical validity of operational models to measure discretionary accruals used in the detection of earnings management. Initially, accounting information and its importance in business valuation and in the establishment of contractual relations are presented and discussed, as well as the accounting measu
Publicado em: 2007
-
5. THREE ESSAYS ON REGIONAL ECONOMICS
The study on regional economics has two particular characteristics that differentiate it from any other field in economics. Macroeconomic variables and national borders are not the focus of analyses, even though regional planners can measure the regional effects of national policies. In this aspect, areas of study in which microeconomic instruments are the m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2007
-
6. InteGrade: Um Sistema de Middleware para Computação em Grade Oportunista / InteGrade: A Middleware System for Opportunistic Grid Computing
The past years witnessed a substantial increase in the need for computing power in various fields of human activity, including many industrial and academic endeavors. Grid Computing addresses those needs, providing seamless access to distributed computing resources, allowing one to use the combined computing power of various machines. However, the majority o
Publicado em: 2004
-
7. Acyl-homoserine lactone quorum sensing in Gram-negative bacteria: A signaling mechanism involved in associations with higher organisms
Recent advances in studies of bacterial gene expression have brought the realization that cell-to-cell communication and community behavior are critical for successful interactions with higher organisms. Species-specific cell-to-cell communication is involved in successful pathogenic or symbiotic interactions of a variety of bacteria with plant and anim
The National Academy of Sciences.
-
8. Attenuation of Pseudomonas aeruginosa virulence by quorum sensing inhibitors
Traditional treatment of infectious diseases is based on compounds that kill or inhibit growth of bacteria. A major concern with this approach is the frequent development of resistance to antibiotics. The discovery of communication systems (quorum sensing systems) regulating bacterial virulence has afforded a novel opportunity to control infectious bacteria
Oxford University Press.
-
9. Inactivation of a Pseudomonas aeruginosa quorum-sensing signal by human airway epithelia
Mammalian airways protect themselves from bacterial infection by using multiple defense mechanisms including antimicrobial peptides, mucociliary clearance, and phagocytic cells. We asked whether airways might also target a key bacterial cell-cell communication system, quorum-sensing. The opportunistic pathogen Pseudomonas aeruginosa uses two quorum-sensing m
National Academy of Sciences.
-
10. Microbial Quorum-Sensing Molecules Induce Acrosome Loss and Cell Death in Human Spermatozoa▿
Infertility in men and women is frequently associated with genital contamination by various commensal or uropathogenic microbes. Since many microorganisms are known to release quorum-sensing signals in substantial amounts, we raised the question whether such molecules can directly affect human spermatozoa. Here we show that farnesol and 3-oxododecanoyl-l-hom
American Society for Microbiology (ASM).
-
11. Analysis of Pseudomonas aeruginosa 4-hydroxy-2-alkylquinolines (HAQs) reveals a role for 4-hydroxy-2-heptylquinoline in cell-to-cell communication
Bacterial communities use “quorum sensing” (QS) to coordinate their population behavior through the action of extracellular signal molecules, such as the N-acyl-l-homoserine lactones (AHLs). The versatile and ubiquitous opportunistic pathogen Pseudomonas aeruginosa is a well-studied model for AHL-mediated QS. This species also produces an intercellular s
National Academy of Sciences.
-
12. Rhamnolipid Surfactant Production Affects Biofilm Architecture in Pseudomonas aeruginosa PAO1†
In response to certain environmental signals, bacteria will differentiate from an independent free-living mode of growth and take up an interdependent surface-attached existence. These surface-attached microbial communities are known as biofilms. In flowing systems where nutrients are available, biofilms can develop into elaborate three-dimensional structure
American Society for Microbiology.