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Práticas de governança eletrônica: um estudo nos sítios das capitais brasileiras
(2013)
A governança eletrônica pode ser conceituada como uma ferramenta de capacitação política da sociedade e fator de aumento de eficiência para o governo. A mesma é responsável por permitir a participação direta dos eleitores ...
Study of fluorine losses in oxyfluoride glasses
(Elsevier B.V., 2005-12-15)
Glasses in PbGeO3-PbF-CdF2 and GeO2-PbO-PbF2-CdF2 systems were studied and the fluorine losses during synthesis were investigated. Samples were characterized by differential scanning calorimetry (DSC), X-ray diffraction, ...
Study of fluorine losses in oxyfluoride glasses
(Elsevier B.V., 2005-12-15)
Glasses in PbGeO3-PbF-CdF2 and GeO2-PbO-PbF2-CdF2 systems were studied and the fluorine losses during synthesis were investigated. Samples were characterized by differential scanning calorimetry (DSC), X-ray diffraction, ...
Upconversion luminescence in Ho3+/Yb3+- and Tb3+/Yb3+-codoped fluorogermanate glass and glass ceramic
(Elsevier B.V., 2008-01-15)
Energy-transfer excited upconversion luminescence in Ho3+/Yb3+- and Tb3+/Yb3+ -codoped PbGeO3-PbF2-CdF2 glass and glass-ceramic under infrared excitation is investigated. In Ho3+/Yb3+-codoped samples, green (545 nm), red ...
Upconversion luminescence in Ho3+/Yb3+- and Tb3+/Yb3+-codoped fluorogermanate glass and glass ceramic
(Elsevier B.V., 2008-01-15)
Energy-transfer excited upconversion luminescence in Ho3+/Yb3+- and Tb3+/Yb3+ -codoped PbGeO3-PbF2-CdF2 glass and glass-ceramic under infrared excitation is investigated. In Ho3+/Yb3+-codoped samples, green (545 nm), red ...