2 documents found, page 1 of 1
Smoke-free homes programme : past, present and future
Precioso, J; Calheiros, J; Samorinha, C; Antunes, H; Machado, JE; Macedo, M; Bonito, J; Vitória, P; Ravara, SChildhood exposure to Environmental Tobacco Smoke (ETS) is associated with serious health problems. Despite the recognised severity of childhood exposure to environmental tobacco smoke (ETS), several studies show high prevalence of exposed children in the world and also in Portugal. In order to protect children of this serious health hazard an ETS type preventive programme, “Smoke free-homes”, was developed and...
Polarization mode dispersion in high-speed optical communication systems
Ferreira, MF; Pinto, AN; André, PS; Muga, NJ; Machado, JE; Nogueira, RN; Latas, SV; Sousa, MH; Rocha, JFWe review the research progress concerning some fundamental issues related to polarization-mode dispersion (PMD) in high-speed fiber-optic transmission systems. We pay particular attention to issues such as the PMD-induced pulse broadening, PMD measurement and emulation, as well as PMD compensation. An electrical equalization technique based on a transversal filter and an optical technique based on a nonlinear ...