any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...

According to Specificity of practice hypothesis, availability of visual information specially during performing tasks witch vision has an important role in improving the accuracy, causes further performance decrements in No-vision transfer test. The purpose of the current study was to examine the effects of vision and amount of practice on accuracy and kinematic of dart throwing. 20 female ...

Background: Universities of Medical Sciences are required to take steps to implement dimensions of the learning organization due to their wide-range of activities and their role in maintaining and improving the community health. This study was conducted to determine the compliance of Isfahan University of Medical Sciences with the components of learning organization.  Methods: This descriptive...

Background: Visual disorders in old age is one of the most important factors in decreasing quality of life of older people. This study aimed to access the vision-related quality of life of older people in Tehran and to examine some of the underlying factors. Materials and Methods: This was a population-based cross-sectional study among 566 older people aged 60 years and over, living in Tehran....