نتایج جستجو برای: radiation models

تعداد نتایج: 1129070  

2008
Christian Piedallu

Plant ecologists have recognized the importance of solar radiation for decades but have difficulty measuring it on plots. Proxies recorded on the ground or geographical information system (GIS) indices processed with a digital elevation model (DEM) have generally been used. Here we compare the efficiency of different methods of estimating spatially distributed topographic solar radiation, from ...

2011
Jake Anderson

We derive displacement equations for Rayleigh and Love waves in simple structural models for point sources in order to better understand source effects on their wavefields and radiation patterns. In doing so, we analytically demonstrate the existence of surface waves in these Earth models. Rayleigh and Love wave radiation patterns are found to mimic the P and SH radiation patterns, respectively...

2010
Jan Pisek Mait Lang Tiit Nilson

RAdiation transfer Model Intercomparison (RAMI) was designed as an on-going mechanism to benchmark radiation transfer (RT) models used to simulate the transfer of radiation at or near the Earth's terrestrial surface, i.e. in plant canopies and over soil surfaces [1]. For the future phases of intercomparisons, one of the expected goals would be to investigate the potential of RT models to reprod...

Journal: :International journal of radiation biology 2014
Niamh McDermott Armelle Meunier Thomas H Lynch Donal Hollywood Laure Marignol

PURPOSE The comparison of cell lines with differing radiosensitivities and their molecular response to radiation exposure has been used in a number of human cancer models to study the molecular response to radiation. This review proposes to analyze and compare the protocols used by investigators for the development and validation of these isogenic models of radioresistance. CONCLUSION There i...

2003
R. VISKANTA

An adequate treatment of thermal radiation heat transfer is essential to a mathematical model of the combustion process or to a design of a combustion system. This paper reviews the fundamentals of radiation heat transfer and some recent progress in its modeling in combustion systems. Topics covered include radiative properties of combustion products and their modeling and methods of solving th...

Journal: :international journal of occupational and environment medicine 0
a staudenherz university clinic of nuclear medicine; medical university of vienna t leitha deptartment of nuclear medicine; danube hospital

the currently reactor wreckage in fukushima raised the following important questions: is our knowledge of the possible dangers of ionizing radiation sufficient to warrant special action? what is the role of the medical community in technical radiation accidents from windscale to fukushima? what is the role of the medical community in terrorist radiation attacks? are we prepared for those challe...

A. Kazemian, F. Farhan, H. Alagheband,

Background: Radioprotective capability of histamine H2 receptor antagonists have been shown in several in vivo studies mainly using animal models. However, to verify the effectiveness of these agents in clinical applications, studies should be performed on human cells. In the present study radioprotective properties of these agents was examined in vitro on human lymphocytes using metaphase anal...

Journal: :journal of agricultural science and technology 0
m. yildirim department of agricultural structures and irrigation, canakkale onsekiz mart university, faculty of agriculture and design, 17020, canakkale, turkey. k. demirel canakkale onsekiz mart university, faculty of architecture and design, 17020, canakkale, turkey. e. bahar ataturk soil, water and agricultural meteorology research station directorate, 39010 kırklareli, turkey.

this study assessed the optimum water need of pepper (capsicum annuum l. cv. california wonder) and the critical irrigation level to be applied in order to achieve a reasonable economic yield in water shortage conditions. in a controlled field experiment involving five different treatments, seasonal evapotranspiration for pepper fluctuated from 89 mm in the severe stress treatment (i0.00) to 1,...

Journal: :iranian journal of radiation research 0
a. acheva stuk - radiation and nuclear safety authority, laippatie 4, 00880 helsinki, finland a. aerts sck•cen - belgian nuclear research centre, radiobiology unit, boeretang 200, b-2400 mol, belgium ch. rombouts sck•cen - belgian nuclear research centre, radiobiology unit, boeretang 200, b-2400 mol, belgium s. baatout sck•cen - belgian nuclear research centre, radiobiology unit, boeretang 200, b-2400 mol, belgium s. salomaa stuk - radiation and nuclear safety authority, laippatie 4, 00880 helsinki, finland k. manda department of radiotherapy and radiation oncology, university hospital rostock, südring 75, d-18059 rostock, germany

in this review, we discuss the use of a variety of 3-d models (particularly 3-d skin, lung, breast and endothelial) in radiobiological research and highlight the differences in responses compared to 2-d culturing conditions (monolayers). we review the characteristics of existing 3-d models and aim to point out the substantial advantages 3-d cultures provide for modern radiobiology. in particula...

So far, several models have been proposed for estimating different climate parameters, but due to the lack of valid and long-term data in some meteorological stations, some models have been difficult to use. The SIMETAV V.1.0 model has been developed in cooperation with the University of California Davis and the Water Resources Authority of California in 2005. The SIMETAW model is a new and inn...

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