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Avaliação de QoS-QoE no serviço de videochamada SkypeTM
Lopes, André D.Dissertação de mestrado integrado em Engenharia de Comunicações ; Web-based videotelephony services currently occupy a prominent place in the wide range of services and generated network traffic. With the growing use of such services comes also an increasing need for the evaluation of user experience. Depending on network conditions, there are relevant QoS parameters (bandwidth, delay, loss ratio, jitter, etc....
Dichloro and dimethyl dioxomolybdenum(VI)–diazabutadiene complexes as catalysts...
Moreira, José A.; Valente, Anabela A.; Pillinger, Martyn; Nunes, Carla D.; Gonçalves, Isabel S.; Lopes, André D.; Romão, Carlos C.; Kuhn, Fritz E.The dioxomolybdenum(VI) complex [MoO2Cl2{p-tolyl(CH3DAB)}] has been prepared in good yield by reaction of the solvent adduct MoO2Cl2(THF)2 with one equivalent of the bidentate ligand N,N-p-tolyl-2,3-dimethyl- 1,4-diazabutadiene. Treatment of the dichloro complex with the Grignard reagent CH3MgCl gives the dimethyl derivative [MoO2(CH3)2{p-tolyl(CH3DAB)}]. The complexes are highly active and selective catalysts ...
Interactions of Cationic and Neutral Molybdenum Complexes with β-Cyclodextrin H...
Lima, Sérgio; Gonçalves, Isabel S.; Ribeiro-Claro, Paulo; Pillinger, Martyn; Lopes, André D.; Ferreira, Paula; Teixeira-Dias, José J. C.; Rocha, JoãoThe inclusion compounds formed between β-cyclodextrin (β-CD) and the tetrafluoroborate salts [Cp‘Mo(η4-C6H8)(CO)2][BF4] and the neutral derivatives Cp‘Mo(η3-C6H7)(CO)2 [Cp‘ = Cp (η5-C5H5), Ind (η5-C9H7)] were studied by means of elemental analysis, FTIR spectroscopy, thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), and magic-angle spinning (MAS) NMR (13C, 11B). Additional information concerning...
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