941 resultados para NONUNIFORM EXTINCTION
Resumo:
Wireless networks have joined to the sports venues, offering to the public a set of facilities, such as the access to email, news, and also to use the social networking, uploading their photos. New challenges have emerged to provide Wi-Fi in this densely populated stadiums, such as increasing capacity and coverage. In this article, an access point antenna array to cover a sector of a stadium is presented. Its structure, designed in a low cost material allows to reduce the total manufacturing costs, an important factor due to the large number of antennas required in these venues. The material characteristic, the broad bandwidth of operation (300 MHz), along with to the low side lobe levels, important to reduce interference between sectors, makes this antenna well-positioned for wireless communications in these particular locals. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2037-2041, 2015.
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A review of extinction risk analysis and viability methods is presented. The importance of environmental, demographic and genetic uncertainties, as well as the role of catastrophes are successively considered, and different approaches aiming at the integration of these risk factors in predictive population dynamic models are discussed.
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[Acte. 1720]
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Contient : Dossiers particuliers de Boisdavy, de l'abbé Brigault, de Dadvisard, de La Jonquière, de l'abbé Lecamus et de l'abbé Thouvenin, comprenant leur correspondance des années 1716-1719 ; Notes prises par Duval, secrétaire de la Lieutenance de police, et ses commis, et par les commissaires des papiers de la B. nommés en 1789, sur les dossiers de l'affaire du duc du Maine