نتایج جستجو برای: osl
تعداد نتایج: 704 فیلتر نتایج به سال:
The significance and extent of band-tail states in the luminescence and dosimetry properties of natural aluminosilicates (feldspars) is investigated by means of studies using low temperature (10 K) irradiation and optically stimulated luminescence (OSL) stimulation spectroscopy, and thermoluminescence (TL) in the range 10-200 K, made in comparison with high temperature (300 K) irradiation and p...
This paper characterizes a subclass of subsequential string-to-string functions called Output Strictly Local (OSL) and presents a learning algorithm which provably learns any OSL function in polynomial time and data. This algorithm is more efficient than other existing ones capable of learning this class. The OSL class is motivated by the study of the nature of string-to-string transformations,...
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Pulsed OSL is applied to nine fine-grained sediment samples from Sichuan province, China, using stimulating pulses of 10 ms on and 240 ms off, with an infrared exposure prior to each OSL measurement. Comparison of fading rates between pulsed and non-pulsed signals, the latter also obtained with a preceding IR exposure, shows that fading is significant for mainly the non-pulsed signals. Presence...
The purpose of this paper is to test the appropriateness of OSL and electronic dosemeters to estimate eye lens doses at interventional cardiology environment. Using TLD as reference detectors, personal dose equivalent was measured in phantoms and during clinical procedures. For phantom measurements, OSL dose values resulted in an average difference of -15 % vs. TLD. Tests carried out with other...
با توجه به کاربرد روزافزون پرتوهای هسته ای در بخش های مختلف پزشکی، کشاورزی، صنعت و هم چنین با توجه به دستیابی بشر به فضا، دزیمتری انواع پرتوها (گاما، نوترون، الکترون و یون های مثبت باردار) از جمله رکن های اساسی این گونه مباحث به شمار می رود. در هرکدام از زمینه های مذکور لازم است تا دزیمتری پرتوهای هسته ای به صورت پَسیو(تجمعی) یا آنلاین انجام شود. سیستم دزیمتری osl ، یکی از انواع دزیمترهایی می با...
All-optical isolator under arbitrary linearly polarized fundamental wave in an optical superlattice.
We theoretically investigate an all-optical isolator under arbitrary linearly polarized fundamental wave (FW) input in an optical superlattice (OSL). The scheme is based on simultaneously phase matching the first-order Type I (oo-e) quasi-phase-matching (QPM) second-harmonic generation (SHG) process and higher-order Type 0 (ee-e) QPM SHG process in an OSL with a defect inserted in an asymmetric...
Thermoluminescence (TL) and optically stimulated luminescence (OSL) techniques are known as a research tools for the study of phosphor materials and for their applications in radiation dosimetry in particular [1]. Although TL technique is known since several decades, OSL is relatively newer technique. The TL or OSL emission from an irradiated sample arises upon stimulation with heat or light re...
We introduce a heuristic method for finding good, feasible solutions for multiproduct lot sizing problems with general assembly structures, multiple constrained resources, and nonzero setup costs and setup times. We evaluate the performance of this heuristic by comparing its solutions to optimal solutions of small randomly generated problems and to time-truncated Optimization Subroutine Library...
سیستم دزیمتری oslاولین بار در سال 1963معرفی و از سال 2005 به عنوان یکی از سیستم های دزیمتری فضایی در مأموریت های مختلف فضایی استفاده شده است. در این پژوهش سعی شده تا برای اولین بار در ایران این سیستم دزیمتری در مقیاس آزمایشگاهی ساخته شود. اساس این تکنیک، پدیده کوانتومی گسیل لومینسانسی است که از طریق تحریک، توسط چشمه نوری حاصل می شود. این سیستم شامل یک ماده دزیمتر osl، بخش اپتیکی و سیستم آشکارسا...
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