Aeolian sediment traps are widely used to estimate the total volume of wind-driven sediment transport, but also to study the vertical mass distribution of a saltating sand cloud. The reliability of sediment flux estimations from such measurements are dependent upon the specific configuration of the measurement compartments and the analysis approach used. In this study, we analyse the uncertaint...

This research presents temperature distribution and thermal strain of functionally graded material cylinders with varying thickness and temperature-dependency properties that are subjected to heat fluxes in their inner and outer layers. The heterogeneous distribution of properties is modeled as a power function. Using first-order temperature theory and the energy method, governing equations are...

in this paper proposes a fuzzy multi-objective hybrid genetic and bee colony optimization algorithm(ga-bco) to find the optimal restoration of loads of power distribution network under fault.restoration of distribution systems is a complex combinatorial optimization problem that should beefficiently restored in reasonable time. to improve the efficiency of restoration and facilitate theactivity...

Ion rejection by nanofiltration (NF) membranes with bipolar fixed charge distributions have been investigated theoretically. Salt flux rectification has been predicted as a result of the broken symmetry of the fixed charge distribution on the pore walls. The existence of an optimal volume flux (i.e. leading to the highest salt rejection) has been put in evidence when there is a region within th...

background: evaluation of multiple-choice questions is a strategic activity and the most effective tool in educational system and improvement. in this study, the quality of some indexes of multiple-choice exams in babol para medical faculty was investigated on the basis of structure and knowledge level distribution in the first semesters of 2007 and 2012. methods: the milman checklist was used ...

abstract background: hemodialysis is the most common renal replacement therapy in the world, and hemodialysis adequacy is an important and influencial factor in the reduction of various complications experienced by these patients. multiple factors influence hemodialysis adequacy. this study was conducted to determine hemodialysis adequacy and its relationship with individual and personal factor...