نتایج جستجو برای: the annual effective dose

تعداد نتایج: 16149628  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران 1387

vocabulary as a major component of language learning has been the object of numerous studies each of which has its own contribution to the field. finding the best way of learning the words deeply and extensively is the common objective of most of those studies. however, one effective way for achieving this goal is somehow neglected in the field. using a variety of activities such as games can r...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده مدیریت 1391

one of the most important factors in study of project’s , is the study of environmental opportunities factors the permanent study of environmental opportunity factors . the study of permanent environmental changing and knowing golden threats’ cooperate with possible threats and at the result in structure forming and future skeleton of organization has a vital effects . the petrochemical industr...

Journal: :iranian journal of radiation research 0
a. kurnaz department of physics, faculty of arts and sciences, kastamonu university, 37100 kastamonu, turkey m. atıf çetiner department of physics, faculty of arts and sciences, kastamonu university, 37100 kastamonu, turkey

background: it is considered that if radon gas is inhaled and ingested, it is the primary health risks for lung and stomach cancers. this paper presents the measurement results of radon activity concentrations both residential tap water and dam water for kastamonu city centre-turkey. materials and methods: the radon activity concentrations of water samples collected from 60 tap waters at four l...

Journal: :مجله انسان، محیط زیست و ارتقاء سلامت 0
mohammad reze mehrasbi department of environmental engineering, school of public health, zanjan university of medical sciences. faranak saghatchi department of radiology, school of paramedical sciences, zanjan university of medical sciences zahra khodaei department of environmental engineering, school of public health, zanjan university of medical sciences jose luis gutierrez-villanueva faculty of medicine, radon group. university of cantabria 39011 santander (spain). koroosh kamali department of public health, school of public health, zanjan university of medical sciences

background; environmental gamma ray refers to the gamma radiation from terrestrial sources and building materials. in enclosed spaces radiation can become a health hazard leading to potential increase in the rates of lung cancer. the goal of this study is to assess the exposure to natural gamma radiation of children in the schools of zanjan province. method; the natural gamma radiation was asse...

Journal: :journal of biomedical physics and engineering 0
m a hosseini shiraz university of medical sciences s b jia department of physics, university of bojnord, bojnord, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شیراز (shiraz university of medical sciences) m ebrahimi-loushab quchan technical and vocational university of iran, quchan, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شیراز (shiraz university of medical sciences)

background: the assessment of rbe quantity in the treatment of cancer tumors with proton beams in treatment planning systems (tps) is of high significance. given the significance of the issue and the studies conducted in the literature, this quantity is fixed and is taken as equal to 1.1. objective: the main objective of this study was to assess rbe quantity of proton beams and their variations...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی 1392

the purpose of this quantitative study was to investigate the relation between efl teachers’ self-efficacy beliefs and their success. moreover, the study was an analysis of the teacher age, gender and years of teaching experience, to examine the manner in which these factors relate to teacher self-efficacy as defined by bandura (1997) and teaching effectiveness as evaluated by their own student...

F. Bouzarjomehri, V. Tsapaki,

Background: Coronary angiography is a commonly performed diagnostic procedure with life saving benefits for the patient. However, this procedure involves relatively high radiation dose. The purpose of this study was to determine the average effective dose of patients undergoing coronary angiography and to estimate the associated radiation risk in terms of fatal malignancy. Materials an...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - پژوهشکده علوم انسانی و اجتماعی 1390

this study attempts to investigate the effect of peers’ revision in comparison to that of the teacher, and whether peers’ comments and teachers’ comments facilitate students’ revision? if yes, which one is more effective? also attempts have been made to see which aspects of language are more highlighted by peers versus teachers when commenting. besides, it is investigating the student’s attitud...

Hassan Moladoust, Mohsen Asadinezhad, Saeideh Aghayari Sedigheh Basirjafari Seyed Mohammad Poorabas

Introduction Guilan is one of the provinces in North of Iran, with population of 2,480,874 and a total area of ​​14,042 square kilometers. This study assesses the outdoor natural gamma dose rates in the air of 49 cities in Guilan and calculates corresponding average annual effective dose. Materials and Methods A total of 260 different sample points measurements were carried out. The results inc...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1392

the present research was conducted to explore the effect of employing two language teaching approaches, i.e. schema-based instruction (sbi) and translation-based instruction (tbi), on vocabulary knowledge, structure and reading comprehension ability of forty one female students learning english in grade one senior high school in rivash, kuhsorkh, iran. while sbi focuses on schemata, i.e. words ...

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