A description and comparison of various EXAFS-like phenomena are presented based on theoretical and practical considerations. Most of the phenomena are similar but not exactly the same as EXAFS. This does not limit their usefulness for structure determination but requires separate experimental calibration and theoretical calculations.

The coronavirus 2019 (COVID 19) pandemic has been a worldwide catastrophe. Four centuries after the plague pandemic, this highly contagious RNA virus ( SARS-CoV-2) become nightmare due to its relentless spread, infecting millions of people with an unpredictably higher fatality, and sequelae yet follow. This viral disease devastated world population in many ways. It affected all stages life, sta...

introduction: human skills, knowledge and efficiency are important factors in the success of organizations and community health centers which have a critical role in total quality management (tqm) as a management system. knowledge is necessary as a source for the organizations survival. on the other hand, in order for implementation of knowledge management, there is a need for a relatively long...