in this research, the effects of the addition of powdered activated carbon (pac) into the aeration zone of an activated-sludge (as) system for treating tehran oil refinery effluent, was investigated during more than 12 months in a pact pilot-scale model. besides the evaluation of organics removal efficiency and determination of basic design factors kinetic coefficients, a series of experiments ...

the literature review of increasing construction density shows that it can have positive and negative impacts on urban development and a way to urban consolidation. nevertheless, it may facilitate urban life and enhance quality of life, as two major topics and subjects in the process toward sustainability and sustainable urban development issues. the literature related to the sustainability ind...

Relational database systems do not eeectively support complex queries containing quantiiers (quantiied queries) that are increasingly becoming important in decision support applications. Generalized quantiiers provide an eeective way of expressing such queries naturally. In this paper, we consider the problem of processing quantiied queries within the generalized quantiier framework. We demonst...