Fresti (Portugal)

O crescimento exponencial da carga de tráfego e a necessidade de acesso ubı́quo provocaram uma expansão da infraestrutura de rede e uma demanda crescente de energia. Portanto, foi elaborado um modelo baseado em programação linear inteiro misto (PLIM) para otimizar a economia de energia nas redes sem fio.

The utilization of laser systems in adverse environment conditions imposes several project restrictions. In our application, the design of laser collimators was developed according not only with the specified optical, mechanical and electronic parameters, but also, taking into account the specific environment characteristics in which the equipment was to be used, namely, climate, physical elements and biological agents. The utilization of several kinds of materials, like silicone, rubber, PVC, nitro-cellulose lacquers and oil varnishes, may facilitate the attack by fungi and in some special cases by bacteria in humid environments. In this paper the behavior of laser collimators after a severe essay with optimal conditions of humidity and temperature appropriated to growth of fungi is described.© (1991) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Ria de Alvor is a small estuary between Lagos and Portimão on the south coast of Portugal, 37°7′–37°10′N, 8°35′–8°38′W.Samples were collected monthly in the period April 1985–March 1986 in an ichthyoplankton and ichthyofauna survey of the estuary. A WP‐2 plankton net was used for catching ichthyoplankton, and a beam trawl and a beach seine were used for catching ichthyofauna.Scaldfish, Arnoglossus laterna (Walbaum, 1792), even though the most abundant species in ichthyoplankton samples, was never found in ichthyofauna samples.From the results obtained, it is concluded that a great part of the fish species are temporary marine visitors using the Ria as a nursery ground, although this system appears to provide a spawning area for species with benthic eggs. No evidence was found of pelagic spawning.

During replication of African swine fever virus (ASFV) the formation of abberant cylindrical forms is sometimes observed, as it has been also reported with other icosahedric viruses (1).© (1980) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.