background: rivers and streams are important sources of surface waters. water quality of these resources depends on many factors including hydrologic, physicochemical and biological factors. these resources are important in terms of social, economic and political development.. zayanderood river is the only river in central basin of iran that has permanent fresh water. this river has an importan...

The quality of aquaculture waters is directly related to water management and efficiency, which puts forward higher requirements for evaluation. Based on the consideration influence temporal spatial changes quality, this paper proposed an improved fuzzy comprehensive evaluation method Specifically, constructing a new membership function in first place, then selecting dissolved oxygen, pH, tempe...

the problems of shortages and quality deterioration of water, have led to an increased interest in the reuse of treated grey water in many parts of the world. this study examined the suitability of locally available materials (beach sand, oyster shells, and charcoal) to treat grey water samples collected weekly from three halls of residence (unity hall, africa hall, and independence hall) on kw...

background and purpose: internal evaluation has been a growing trend as the first step improvement in higher education specially in medical universities of iran. however, the results of this time consuming process of internal evaluation seems to be underused. we provide a description of anesthesiology department of shaheed beheshti university of medical sciences where the results were used to i...