Wear is a complicated phenomenon caused by the relative movement of two contacting surfaces compressed together by a normal force. Prediction of the wear, in most cases, requires various experiments and microstructural characterization of the contacting surfaces. Mathematical models based on physical concepts could provide considerable help in understanding the physical behavior and hence the p...

Wear is a complicated phenomenon caused by the relative movement of two contacting surfaces compressed together by a normal force. Prediction of the wear, in most cases, requires various experiments and microstructural characterization of the contacting surfaces. Mathematical models based on physical concepts could provide considerable help in understanding the physical behavior and hence the p...

Intergenerational solidarity is and important phenomenon for strengthening  social cohesion and is an important immediate mechanism that has major role in the transfer of knowledge from generation to generation. But the distance between parents and youth, among generations, and this gap exists between the social system, with profound social problems facing the generation gap in the process in t...

landfill gas is generated by organic waste decomposing under anaerobic conditions. landfill gas contributes to the emission in the atmosphere of greenhouse gases and causing global warming. humidity of environment is an effective parameter on rate of gas generation in landfills. saravan landfill is investigated as study area in this research. it located in 20 kilometers of rasht-tehran highway....

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the computer simulation program of a practical scale reverse electrodialysis process has been developed based on the program for saline water electrodialysis. the program is applied to compute the performance of an industrial-scale reverse electrodialysis stack (effective membrane area s = 1 m × 1 m = 1 m2, cell pair number n = 300 pairs). the stack operatingconditions are optimized. seawater a...

although pregnancy was once thought to protect against psychiatric disorders, gravid and non gravid women have similar risks for major depression, at 10% to 15%. both depression and antidepressant treatment during pregnancy have been associated with risks. few medications have been proved unequivocally safe during pregnancy. although certain antidepressants have not been linked with an increase...