نتایج جستجو برای: physical factor
تعداد نتایج: 1468410 فیلتر نتایج به سال:
BACKGROUND Wedge filters can be used as missing tissue compensators or wedge pairs to alter the shape of isodose curves so that two beams can be angled with a small hinge angle at a target volume without creating a hotspot. AIM In this study the dosimetric properties of Varian Enhanced Dynamic Wedge (EDW) and physical wedges (PW) were analyzed and compared. MATERIALS AND METHODS Ionometric ...
background when a primary radiation interacts with a medium, the secondary radiations are produced, that the contribution of these secondary radiation should considered in the calculation of dose. build-up factor is a dosimetric correction factor to assume effect of secondary radiation in calculation of dose. calculation of this factor is very difficult and time consuming. due to significance o...
The purpose of this study was to construct and validate a "Perceived Physical Literacy Instrument" (PPLI) for physical education teachers. Based on literature review and focus group interviews, an 18-item instrument was developed for the initial tests. This self-report measure, using a 5-point Likert scale, formed the PPLI and was administered to 336 physical education teachers in Hong Kong. Th...
BACKGROUND The present study aimed at assessing the psychometric properties of psychosocial determinants of physical activity-related measures in Iranian adolescent girls. METHODS Several measures of psychosocial determinants of physical activity were translated from English into Persian using the back-translation technique. These translated measures were administered to 512 ninth and tenth-g...
Background and aims: The relationship between physical-mental health and Migraine headaches and stress, especially job stress, is known. Many factors can construct job stress in work settings. The factor that has gained much attention recently is inequality (imbalance) of employees’ effort versus the reward they gain. The aim of the current attempt was to investigate the validity of effort-re...
the aim of this study is to investigate the share of total factor productivity growth (tfpg), labor force growth and physical capital growth on the value added growth of non-oil sector by applying the cob-douglass production function during the third, fourth and fifth development plans before the islamic revolution of iran (1342-1356), and during the first, second, third and forth economic, soc...
objective: lack of exercise is the fourth cause of death in the world. there is an inverse relationship between physical activity and the risk of diabetes. the aim of this study was to determine physical activity status and its related factors among type 2 diabetic patients in hamadan, west of iran. materials and methods: this analytical-observational study was performed on320 type 2 diabetic p...
Introduction: Participation of the elderly in leisure sports activities with a game approach, leads to improving their quality of life and by creating motivation and hope, moderates the inertia created in old age. The aim of this study was to identify and prioritize the effective factors in the development of games and sports for the elderly. Methods: The present study was conducted with a ...
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