UNESCO-GIE
UNESCO
1986
Search results
86 records were found.
Composiçäo dos alimentos para animais
Ciência veterinária e higiene
Conservação da natureza e recursos da terra
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Biologia do solo
Vol. 1 : Ascomycetes. - 1984. - 310 p
Bibliografia : p. 711
Bibliografia : f. 555
Produção de aquicultura
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Fisiologia e bioquímica vegetal
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Bibliografia p. 891
Proveniente do fundo do ex-CDE existente no IPCB
Proveniente de: ESTCB. LOTTSIG
Proveniente de: ESTCB. LOTTSIG
Contém referências bibliográficas
Based on the concepts of Delay-Tolerant Network (DTN) and Opportunistic Networks, Vehicular opportunistic networks have been proposed to interconnect developing communities, or to implement disaster recovery networks when all other networks fail. Other possible application scenarios for these networks include traffic monitoring, accident warnings, advertisements, and information retrieval applications. The diversity of these network environments introduces challenging issues related to the architecture, protocol designs, interoperability, security, management, and stability of vehicular opportunistic networks. Furthermore, these networks are characterized by variable and intermittent connectivity and frequent network partition. The store-carry-and forward strategy can be used to cope with disconnections. However, in sparse networks with low node density, this strategy may be complemented with the introduction of stationary relay nodes into the network. These nodes are placed along vehicle's routes and create additional transmission opportunities. Therefore, when correctly positioned they will contribute to augment the message delivery ratio. This chapter investigates recent advances related to the deployment of stationary relay nodes on vehicular opportunistic networks. Furthermore, it presents a study that evaluates the impact of adding stationary relay nodes on the performance of DTN routing protocols applied to vehicular opportunistic networks. Two distinct environments were considered, rural and urban scenarios. Each of them combines different application scenarios, map areas, node density, and vehicle movement models. For both scenarios, results show that stationary relay nodes increase the number of contacts between network nodes, improving the overall performance of the network in terms of message delivery ratio.
This article is an explanation based on the bibliography of the specialties of communication design, Corporate Visual Identity, ergonomics and visual perception of graphic signs, with the intention of increasing communicational efficiency in designers' work.
Based on the assumptions of perceptual efficiency, ergonomics and symbolic, graphic brands are contextualized as strategic elements of Corporate Visual Identity.
The globalized knowledge society for the information that surrounds the Internet on a global scale, the cultural changes and technological developments appear to facilitate that the design of symbols creates problems in a semantic, perceptual and ergonomic dimension. In particular, new digital media seem to foster graphic solutions with a strong mesmerizing power, but moving at a pace that the evolution
An overview of the 1872-205 IEEE standard and the efforts related to it.
