نتایج جستجو برای: دوزیمتر ترمولومینسانس tld

تعداد نتایج: 1062  

1970
Iolo Madoc-Jones

This article explores the rationales for creating specific top level domain (TLD) names to support minority languages and cultures, focussing specifically on the case for a TLD .cy or .cym for Wales. Some background information on domain names and Wales and the Welsh language is provided. Following on from this, the way identity may be constructed is explored and the importance of TLD’s in term...

یکی از مهمترین ماده های معادل بافت که امروزه کاربرد گسترده ای در دزیمتری ترمولومینسانس دارد، LiF:Mg,Cu,P است. حساسیت این ماده با غلظت آلاینده ها و کم یا اضافه کردن هر یک از آنها تغییر می کند. لذا در این مطالعه، ماده ترمولومینسانس LiF با آلاینده های منیزیم، مس و فسفر به صورت پودر تهیه شد و حساسیت آن به دمای بازپخت در گستره °C400-240 به مدت 10 دقیقه مورد بررسی قرار گرفت. مشخص شد که با افزایش دمای...

2015
M. Sadeghi S. Sina R. Faghihi

LiF, Mg and Ti cubical TLD chips (known as TLD-100) are widely used for dosimetry purposes. The repeatability of TL dosimetry is investigated by exposing them to doses of (81, 162 and 40.5 mGy) with 662keV photons of Cs-137. A group of 40 cubical TLD chips was randomly selected from a batch and the values of Element Correction Coefficient (ECC) were obtained 4 times by irradiating them to doses...

2007
L. Strauss

In the field of thermoluminescence dosimetry the daily analysis of multi-peak glow curves includes computerized curve-fitting methods, the so-called deconvolutions. These are in need of restricting the kinetic parameters E and s in order to obtain physically relevant results. There have been suggested various methods for the determination of these kinetic parameters based on a theory treating s...

2008
Maria Inês Teixeira Sonia G. P. Cecatti Linda V. E. Caldas

Cases involving high-doses of ionizing radiation are becoming increasingly common.The objective of this work was to characterize thermoluminescent materials for the dosimetry of workers exposed to high doses. Samples of TLD-200, TLD-400 and TLD-800 pellets from Thermo Electron Corporation were studied in gamma high-doses. Dose-response curves were obtained for doses between 100 mGy and 100 Gy. ...

2010
Ana Carolina Paiva Bento Debora Maria Befi-Lopes

Background: the narrative abilities provide valuable information about the linguistic, cognitive and social development of school-age children with typical language development (TLD). Aim: to examine the temporal ordering of figures and the narrative abilities of school-age children with TLD in relation to the type of discourse presented. Method: participants of this study included 60 children ...

Journal: :Analytical chemistry 2001
P D Wentzell S S Nair R D Guy

The application of trilinear decomposition (TLD) to the analysis of fluorescence excitation-emission matrices of mixtures of polycyclic aromatic hydrocarbons (PAHs) is described. The variables constituting the third-order tensor are excitation wavelength, emission wavelength, and concentration of a fluorescence quencher (nitromethane). The addition of a quencher to PAH mixtures selectively redu...

ژورنال: :مجله دندانپزشکی جامعه اسلامی دندانپزشکان 0
دکتر احمدرضا طلائی پور ahmad reza talaeipour دکتر شیرین سخدری shirin sakhdari مهندس منصور جعفری زاده mansour jaffarizadeh دکتر مریم میرزایی maryam mirzaei دکتر سحر طالبی sahar talebi دکتر مازیار طلائی پور maziar talaeipour

مقایسه دوز جذبی ارگان های هدف در رادیوگرافی لترال سفالومتری   کانونشنال و دیجیتال     دکتر احمدرضا طلائی پور1- دکتر شیرین سخدری2 - مهندس منصور جعفری زاده3 – دکتر مریم میرزایی4- دکتر سحر طالبی5 – دکتر مازیار طلائی پور6   1- استاد گروه آموزشی رادیولوژی دهان، فک و صورت. دانشگاه آزاد اسلامی، واحد دندانپزشکی تهران   2- استادیار گروه آموزشی رادیولوژی دهان، فک و صورت. دانشگاه آزاد اسلامی، واحد دندانپز...

2013
May Daher Farhat Zhuojun Guo

TRANSFER RNA DYNAMICS AND TRANSFER-MESSENGER RNAACCOMMODATION IN BACTERIAL RIBOSOMES AT THE SINGLE-MOLECULELEVEL byMAY DAHERDecember 2012Advisor: Dr. David RuedaMajor: Chemistry (Biochemistry)Degree: Doctor of PhilosophySingle-molecule spectroscopy, protein-induced fluorescence enhancement(PIFE), fluorescence resonance energy transfer (FRET), and several ...

2015
R. Cole Robinson Christopher L. Nelson Elizabeth S. Bloom Kelly D. Kisling Bryan E. Mason Gary D. Fisher Steven M. Kirsner

The purpose of this study was to determine the dose to the contralateral breast during accelerated partial breast irradiation (APBI) and to compare it to external beam-published values. Thermoluminescent dosimeter (TLD) packets were used to measure the dose to the most medial aspect of the contralateral breast during APBI simulation, daily quality assurance (QA), and treatment. All patients in ...

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