نتایج جستجو برای: radiation systems
تعداد نتایج: 1402818 فیلتر نتایج به سال:
Introduction: Individual exposure after a nuclear detonation (atomic bomb) delivers abundant doses with high dose rates to the people who were located near the nuclear detonation location or within the fallout zone. Effects of the radiation to the humans and animal models will be studied and a fundamental ground work of medical services and managing systems for such accidents wo...
Since the effectiveness of the development and operation of scientific facilities (especially those presenting specific hazards, such as ionizing radiations) relies heavily on state of the art practices, such as systems engineering and product lifecycle management, configuration management (CM) is becoming a key management process. However, while some maturity models exist to assess the degree ...
There are a number of variables that are correlated with land elevation. Land elevation, and in particular, its surrogate variables such as natural background radiation, can be studied in relation to cancer rates. The present ecological study focuses on three such variables correlated with land elevation: natural background radiation (NBR), oxygen concentration (OC), and barometric pressure (BP...
تخمین دقیق مشخصات کانال در سیستم های مخابراتی یک امر مهم محسوب می گردد. این امر به ویژه در کانال های بیسیم با خاصیت فرکانس گزینی و زمان گزینی شدید، چالش بزرگی است. مقالات متعدد پر از روش های مبتکرانه ای برای طراحی و آنالیز الگوریتم های تخمین کانال است که بیشتر آنها از روش های خاصی استفاده می کنند که یا دارای عملکرد خوب با پیچیدگی محاسباتی بالا هستند و یا با عملکرد نه چندان خوب پیچیدگی پایینی...
Background: In recent decades many guidelines has been conducted by radiation protection organizations about radiation protection in dentistry. This study aimed to evaluate the observance of these guidelines in educational clinics of all dental schools in Iran. Material and Methods: In this cross-sectional study a self-administered questionnaire, based on National Radiation Protection ...
gamma rays pose enough energy to remove electrons from atoms of absorbing material including human body and adversely affect human health. the external exposure of human beings to natural environmental gamma radiation normally exceeds that from all man-made sources combined. therefore, we monitored gamma dose rate in indoor environments and estimated corresponding annual effective dose in selec...
plant dry matter accumulation has a linear relation with accumulative photosynthetically active radiation (par). intercropping could be a strategy for increasing light absorption in agronomic systems and it may improve radiation use efficiency (rue). thus this study was conducted in order to evaluate radiation absorption and use efficiency in potato (solanum tuberosum l.) –corn (zea mays l.) in...
background: radioprotective effect of famotidine was previously shown on radiation induced micronuclei and chromosomal aberrations in human peripheral lymphocytes and mouse bone marrow cells however, its radioprotective property has never been studied in mouse spermatogenesis. it was also shown that vitamin c as an antioxidant also exert its radioprotective effect on many biological systems, bu...
Deployment of wireless systems in nuclear power plants has attracted a lot of attention recently. However, before wireless systems can be installed in a nuclear power plant, it is necessary to evaluate the effect of radiation environment on electromagnetic wave which is the communication media for all radio wave based wireless systems. This is particular important if the wireless systems are ex...
Radiation detector systems in nuclear medicine imaging A radiation detector system in nuclear medicine imaging is definitely a timely topic or area of research where not many papers are available in the literature of nuclear medicine imaging. Arguably, no single device can detect all kinds of radiation and no one device is useful in all situations. Understanding of the principles of radiation d...
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