sediment flushing of reservoirs is an operational technique, whereby previously accumulated sediments in the reservoirs are hydraulically removed by accelerated flow when the bottom desiltingoutlets of the dam are opened. in this research, the process of sediment flushing is simulated by a three dimensional numerical model in which sediment and flow interaction are reflected in the reservoirs. ...

sohrabi and nalchigar (2010) proposed a new data envelopment analysis (dea) model to identify the most efficient decision-making unit (dmu) in presence of imprecise data. in this paper, it is shown that the proposed model is not able to determine the most efficient dmu and is randomly introduced an efficient dmu. in addition, it is shown that this model determines the most efficient dmu in the ...

background: this study presents a framework for development of integrated health, safety and ergonomic (hse) in complex critical systems. total ergonomics model considers conventional ergonomics factors as well as management and organizational factors. methods : control room operation and maintenance department of a thermal power plant was chosen as the case of our study. to achieve the above o...

the steel slag is the main by-product of steel industry. the aim of this study using the steel slag as a low-cost absorbent in order to remove cadmium pollutant from industrial wastewater. some factors that affect the process of cadmium removal by steel slag such as ph, contact time, absorbent dosage and cadmium initial concentration has been studied. standard solution of synthetic wastewater i...

The debate over the contribution of the Internet to democracy is farfrom settled. Some point to the empowering effects of online discussionand fund raising on recent electoral campaigns in the US to argue thatthe Internet will restore the public sphere. Others claim that the Internetis just a virtual mall, a final extension of global capitalism into everycorner of our lives. This paper argues f...

more than half of all hydrocarbon reservoirs are naturally fractured reservoirs (nfrs), in which production forecasting is a complicated function of fluid flow in a fracture-matrix system. modelling of fluid flow in nfrs is challenging due to formation heterogeneity and anisotropy. stress sensitivity and depletion effect on already-complex reservoir permeability add to the sophistication. horiz...