Background: In recent decades, much interest has been focused on investigating new roles of vitamin D in human body beyond the mineral-ion homeostasis. Methods: By searching medical databases such as PubMed, over 16000 articles were found which have been published since 2000 on novel aspects of vitamin D in health and diseases. Results: Of great interest was the effects of vitamin D on ...

the aim of this research was to study the effect of communication skills and interpersonal communication and their roles in the effectiveness of managers of sport organizations. the research was descriptive analytical and conducted through a survey. the population included 670 sport managers of iran sport organizations. the sample was selected by stratified random sampling method. questionnaire...

abstract. this study aims to identify and prioritize the factors affect the effectiveness of human resources at islamic azad university of karaj. the research is descriptive-survey method because researchers use a questionnaire, content validity and the experts’ point of views are used to assess the validity of questionnaire and cronbach's alpha was used to assess the reliability. to measu...

One of the most important issues in strategic management is enhancing employees’ motivation to contribute in the implementation of strategies; because they usually do not pay necessary attention to strategies. Accordingly, it is required to consider and calculate their roles in implementing strategies. In terms of employees’ role in the organization, they have managerial (goal setter) and/or no...

the article addresses the mutual relationship between environmental improvements and improvement in social status of women. the main question of this article is: are there any relationships between improvement in environment protection and promotion in the situation of women? the theoretical framework includes hatfield’s view about the existence of communities between the public and private sph...