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تعداد نتایج: 282881 فیلتر نتایج به سال:
در این پروژه، خواص ساختاری و الکترونی بلور ?-mnas را مورد بررسی قرار دادیم. ?-mnas دارای فاز ساختاری هگزاگونال از نوع nias با نظم اسپینی فرومغناطیس است. بلور ?-mnas یک سیستم فلزی است از این رو در نمودار چگالی حالات الکترونی و همچنین ساختار نواری آن، گاف انرژی مشاهده نشد. در نمودار چگالی حالات کل بلور mnas ، به طور تقریبی شکافتگی اسپینی حدود 4ev وجود داشت و در نمودار چگالی حالت های جزیی این سیست...
background: assessing the growth of infants is a main parameter in their health assessment. thus, we have studied the growth condition of children from born to 18 months in this research in bandar abbas, iran, 2015. methods: in this descriptive study, we have selected 104 case records from the dataset of health center number 8 of bandarabbas by means of simple randomized sampling. all data abou...
The Mashhad drug and poison information center (MDPIC) was officially established in 2000 to provide up-to-date information on medications. The objective of this study is to provide an epidemiologic profile of drug inquiry and poisoning-related phone calls to MDPIC from 2007 to 2017. This article is a descriptive retrospective study in which all inquiries about drugs and poisoning cases receive...
introduction: to cope with novel changes, organizations must think beyond environmental compatibility and seek to take advantage of potential opportunities. a paradigm for this is the enhancement of organizational flexibility, speed, quality, and agility. human resources are the most important tool for enhancement of organizational agility and the most valuable asset of each organization and co...
large cities and metropolitan areas in developing countries are growing rapidly. these areas grew by attracting all facilities, services and capital of the country. tehran has been the major city and center for decision and policy making in various administrative, political, economic and socialaspects. this political focus has brought economic, social, educational focus that attracted a vast ma...
objective: today people are aware of the important role of agriculture as a vital source in their life. development in agriculture and making healthy food for human, needs trained man. vocational schools and agricultural training centers provided the first stage for arriving at this purpose. one of the reasons for the weak influence of agricultural training centers in creating occupational oppo...
disasters are one of the most important challenges which must be considered by every management system. higher education centers have high disaster risk because of their risk factors (existence of historical and scientific documents and resources and expensive laboratory equipment in these centers emphasizes the importance of disaster management). moreover, the existence of young volunteers of ...
background: preconception counseling is preventive medicine in obstetrics. preconception care creates an opportunity for examining conditions before pregnancy improving pregnancy outcome. this study was conducted with the aim of determining the adaptation rate of preconception care with the national standards at health care centers, ahvaz, 2014. methods: this descriptive study was conducted at ...
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