Socially Responsible Investing (SRI) is broadly defined as an investment process that integrates not only financial but also social, environmental, and ethical (SEE) considerations into investment decision making. SRI has grown rapidly around the world in the last decades. In the last years,...

This paper proposes a crisp two-objective logarithmic programming model to help companies decide their advertising campaigns on TV networks for mature products. Both objectives are: (a) to achieve the highest audience impact and (b) to reduce advertising costs as much as possible. Information...

We present experimental results of phase conjugation (PC) via degenerate four-wave mixing in amorphous Se, Ge10Se90 and Te7Se93 semiconductor thin films. Simultaneously to the PC signal a laser induced grating is formed. However the relief of the grating alone does not seem to explain the...

Solar thermal electricity technologies are attractive alternatives to produce electricity by means of a renewable source. One of these technologies is parabolic trough collectors. In Spain, the sale of solar electricity to the national grid is primed. There are three main parameters that affect...