in future, the main cause of competitive advantage for companies is successful new product development. in recent 30 years, many researches have done about efficiency of npd process and many various models have been developed to systematize these processes. in the npd process, great amount of organizational knowledge will be created, stored, retrieved and used. therefore, many researchers presu...

neuroinflammation has a significant role in induce of multiple sclerosis (ms) many approaches have been used to treat ms, but none of these methods have not been able to fully improve. one of the methods can suppress inflammation and regenerate the nervous system is the use of cell therapy. using cell therapy in pre-clinic phase can be realized, it's mechanism and potency to suppress neuro...

Nowadays, functionally graded materials (FGM) are widely used in many industrial, aerospace and military fields. On the other hand, the interest in the use of shrink-fitted assemblies is increasing for designing composite tubes, high-pressure vessels, rectors and tanks. Although extensive researches exist on thick-walled cylindrical shells, not many researches have been done on shrink-fitted th...

A recent paper by a science journalist in Nature shows major errors in understanding phylogenies, in this case of placental mammals. The underlying unrooted tree is probably correct, but the placement of the root just reflects a well-known error from the acceleration in the rate of evolution among some myomorph rodents.