نتایج جستجو برای: optimize energy relative to depth at bnct
تعداد نتایج: 11387309 فیلتر نتایج به سال:
the study of flow in compound channels with vegetated floodplains is essential to assessing the development of the stage-discharge relationship and sediment and pollutant transport. the present study experimentally investigated mean flow and turbulence characteristics in a prismatic compound channel. the experimental program consisted of vegetated and non-vegetated floodplains with different re...
The important things in designing facilities for BNCT are to obtain neutron beams with appropriate energy spectrum and intensity for efficient treatment. In recent years, at several universities, accelerator-based BNCT facilities were designed, which are composed of target and beam shaping assembly to generate epithermal neutron beams[1]. As a previous study, target system[2][3] and a beam shap...
In Boron Neutron Capture Therapy (BNCT), the patient is injected with a tumor localizing drug containing a boron-10 compound. Then the tumor region is irradiated with an appropriate neutron beam. Lethal dose deposited by 10B (n, α)7Li reaction products cause destruction of the tumor cell. Recently, a lot of efforts have been done for the use of Tehran Research Reactor (TRR) for BNCT and a...
چکیده نمایشگاه های جهانی یا اکسپو عنوانی ست که از سال 1851 میلادی در لندن توسط همسر ملکه انگلستان شکل گرفت ، هدف اولیه این نمایشگاه ها نمایش دستاورد های صنعتی بود، اما در طول 165 سال که این نمایشگاه های برگزار گردیدند ، رویکرد آنها تغییر کرده است . در هر دوره به یک شعار که در واقع دغدغه اصلی جهان، در آن زمان بوده است ، پاسخ داده شده و راه حل کشور های مختلف در مورد آن موضوع به نمایش گذارده شد...
flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...
Boron neutron capture therapy (BNCT) is a form of radiation therapy mediated by the short-range (less than 10 microns) energetic alpha (4He) and lithium-7 (7Li) ionizing particles that result from the prompt disintegration by slow neutrons of the stable (nonradioactive) nucleus boron-10 (10B). Recent advances in radiobiological and toxicological evaluation of tumour-affinitive boron-containing ...
the purpose of this study is identifying effective factors which make customers shop online in iran and investigating the importance of discovered factors in online customers’ decision. in the identifying phase, to discover the factors affecting online shopping behavior of customers in iran, the derived reference model summarizing antecedents of online shopping proposed by change et al. was us...
The drops are used to control the descents, stabilize the bed level, and control the upstream water level in sloping channels with less slope than the ground slope. The current study presents a numerical analysis of hydraulic characteristics in the vertical drop using computational fluid dynamics. At first, the laboratory models were used for verification and choosing the best model of turbule...
investigation the archetype of mother can help the reader to understand poes works, especially his fiction, better, if not fully. motivated by internal and external drives to get into the universe in its manifold form poe was impelled to art and, from various modes of art, to symbolism. how much was poe successful to produce works of art has been a matter of dispute among critics. however, ther...
Background : Performing successful BNCT experiments needs a suitable neutron source. Important factors of the neutron beam are flux and energy that are very important in the selection of neutron source. In most centers that use this method for treatment, reactor is a neutron source, which according to characteristics of the reactor appropriated neutrons are very high. High cost of constructin...
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