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Depression of pyrite by dextrin in flotation with xanthates has been studied. The adsorption of dextrin and xanthates at the pyrite/aqueous solution interface has been investigated through electrokinetics, Raman spectroscopy and batch adsorption studies using oxidized pyrite. Microflotation studies were undertaken to evaluate the pyrite depression with dextrin using ethyl and propyl xanthates as the...
In the last few years, besides the concepts of embedded and interconnected systems, also the notion of Cyber-Physical Systems (CPS) has emerged: embedded computational collaborating devices, capable of sensing and controlling physical elements and, often, responding to humans. The continuous interaction between physical and computing layers makes their design and maintenance extremely complex. Uncertainty...
The unpredictable and volatile nature of wind power is the main obstacle of this generation source in short term trading. Owing to the ability of demand side to cover wind power imbalances, aggregated loads have been presented in the literature as a good complementary resource for the wind generation. To this end, this paper proposes a technique to obtain the best offering strategy for a hybrid power...
This paper aims at forecasting the role of Satellite Communications (SatCom) in the context of Future Internet and particularly of the future Internet-enabled smart infrastructures in support of some European Societal Grand Challenges. It also aims at identifying the necessary technological enablers which need to be developed by the European SatCom industry for the emerging SatCom solutions.
Halitoxin was previously isolated from the sponge Amphimedon compressa (= Haliclona rubens) from the Pacific Ocean. This toxin was recently identified in Amphimedon viridis, and it was partially characterized (Schimitz, 1978). In this work we isolated and characterized the halitoxin from A. viridis, and biological activities were studied. Sponge samples were collected on the north coast of Sao...
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