He-broadening and shift coefficients of water vapor lines in infrared spectral region

The water vapor line broadening and shift coefficients in the ν1+ν2, ν2+ν3, ν1+ν3, 2ν3, 2ν1, 2ν2+ν3, and ν1+2ν2 vibrational bands induced by helium pressure were measured using a Bruker IFS 125HR spectrometer. The vibrational bands 2ν3 and ν1+2ν2 were investigated for the first time. The interaction potential used in the calculations of broadening and shift coefficients was chosen as the sum of pair potentials, which were modeled by the Lennard-Jones (6-12) potentials. The vibrational and rotational contributions to this potential were obtained by use of the intermolecular potential parameters and intramolecular parameters of H2O molecule. The calculated values of the broadening and shift coefficients were compared with the experimental data. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only

Investigation of interaction of carbon dioxide with aerogels nanopores

The absorption spectrum of 2 0 0 12 – 0 0 0 01 band of carbon dioxide, confined in 20 nm nanopores of silica aerogel, was measured with help of a Bruker IFS 125 HR Fourier transform spectrometer at room temperature and a spectral resolution of 0.01 cm-1. The obtained dependence of spectral line half-width values on rotational quantum numbers was studied and compared with data available in the literature. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only

Khalifa University Reachback Program Supporting Prevention of Illicit Nuclear and Radiological Material Smuggling in the United Arab Emirates

Trafficking of Illicit nuclear or radiological materials is a global threat which can involve and adversely affect any country. Ultimately, it is the responsibility of each state to prevent and combat illicit nuclear trafficking by screening all cargo and travelers entering, exiting, and transiting through its borders. As a part of the national radiation detection infrastructure of the United Arab Emirates (UAE), a reachback program was established at Khalifa University (KU) to provide capabilities for adjudication of radiation alarms at Khalifa Port and other radiation portal monitor (RPM) locations. In addition to the main mission, KU Reachback aims to educate and prepare local talent to lead these vital efforts in the future. This is particularly important because the UAE, similar to other newcomers to the nuclear industry, faces human capital challenges which can be addressed using domestic or regional solutions

Parameters of broadening of water molecule absorption lines by argon derived using different line profile models

The water vapor absorption spectrum was measured in the spectral region 6700–7650 cm–1 with argon as a buffer gas. The room-temperature spectrum was measured using a Bruker IFS 125-HR Fourier Transform Spectrometer with high signal-to-noise ratio, with a spectral resolution of 0.01 cm–1, at argon pressures from 0 to 0.9 atm. The H2O absorption spectral line parameters are derived by fitting two line shape profiles (Voigt and speed-dependent Voigt) to the experimental spectrum. It is shown that the use of speed-dependent Voigt profile provides the best agreement with experimental data

Modification of the experimental setup of the FTIR spectrometer and thirty-meter optical cell for measurements of weak selective and nonselective absorptions

The improvement of the experimental setup based on a Fourier spectrometer Bruker IFS-125 and a 30-meter multipass optical cell is described. The improvement includes the cell equipment with a system of automated adjustment of the number of beam passes without cell depressurization and ensures the cell work at high temperatures

Статистический анализ механизма формирования концептов-представлений в организационно-технических системах

The aim of the research is the analytical description of one of the modules of the organizational and technical system, designed for the formation of sensual images and their transformation into concepts-representations. Within the framework of the computer paradigm in organizational and technical systems, such obvious principles as digital representation of information and its processing with the use of algorithms implemented by computing means are used. The success of the computer paradigm application is certainly impressive, but there are clearly situations in which human consciousness operates much more efficiently, interpreting the unconventional, the new situation with the aim of formulating an adequate response. In this regard, attempts to model some mechanisms of human consciousness within the framework of the cognitive approach are of great interest. In accordance with the ideas of cognitive theory in the human brain, images (schemes, categories, gestalts, systems, archetypes, etc.) are formed and then are processed. It is assumed that the resulting images are those effects that are then processed, perceived, used by the organizational and technical system for the formation of concepts-representations. Concept representation is a generalized sensual-visual image of the object or phenomenon and is characterized by a number of features, the number of which may vary in the course of the system operation.The method of Markov chains is used to study the statistical characteristics of the mechanism of formation of concepts-representations. It is assumed that the formation of sensual images and their transformation into concepts-representations occurs at random moments of time. The module of concept-representation formation can be in one of two states that correspond to the logic of its functioning – either its state does not change, or when a new concept-representation is formed, the state of the module changes. A stochastic matrix of one step transient probabilities, characterizing changes in the module states and corresponding initial probabilities of states is introduced. Because of application of the theory of Markov chains with two states, the relations for the probabilities of the module states through an arbitrary number of steps, as well as asymptotic expressions for the probabilities of states are given. The graphs of the module state probabilities change depending on the number of circuit steps, initial probabilities, probabilities of one-step transitions of the stochastic matrix are presented.Analytical expressions and corresponding graphs for the average number of stays in the module of a particular state are obtained, which are interpreted as the average number of corrections of essential features of concepts-representations. The asymptotic relations for the number of corrections are obtained, and the error of the approximate asymptotic relations is estimated.Thus, the paper formulates a very general model of the random process of formation of sensual images and their transformation into concepts-representations. The key task of the practical application of the model is to analyze the logic of the functioning of a particular organizational and technical system and to determine on this basis the parameters appearing in the model.Целью исследования является аналитическое описание одного из модулей организационно-технической системы, предназначенного для формирования чувственных образов и их преобразования в концепты-представления. В рамках компьютерной парадигмы в организационно-технических системах используются такие очевидные принципы, как цифровое представление информации и ее обработка с применением алгоритмов, реализуемых вычислительными  средствами. Успехи применения компьютерной парадигмы являются, безусловно, впечатляющими, однако очевидно, что существуют такие ситуации, в которых человеческое сознание действует значительно эффективнее, интерпретируя нестандартные, новые ситуации с целью выработки адекватного реагирования. В связи с этим большой интерес представляют попытки моделирования некоторых механизмов человеческого сознания в рамках когнитивного подхода. В соответствии с представлениями когнитивной теории в человеческом мозге формируются образы (схемы, категории, гештальты, системы, архетипы и т.п.), которые затем обрабатываются. Предполагается, что возникшие образы, являются теми воздействиями, которые затем обрабатываются, воспринимаются, перерабатываются, используются организационно-технической системой для формирования концептов-представлений. Концепт-представление является обобщенным чувственно-наглядным образом рассматриваемого предмета или явления и характеризуется рядом признаков, число которых может меняться в процессе функционирования системы.Для исследования статистических характеристик механизма формирования концептов-представлений в работе используется метод марковских цепей. Предполагается, что формирование чувственных образов и их преобразование в концепты-представления возникает в случайные моменты времени. Модуль формирования концептов-представлений может находиться в одном из двух состояний, отвечающих логике его функционирования – либо его состояние не меняется, либо при формировании нового концепта-представления состояние модуля меняется. Введена в рассмотрение стохастическая матрица одношаговых переходных вероятностей, характеризующая изменения состояний модуля, а также соответствующие начальные вероятности состояний.В результате применения теории марковских цепей с двумя состояниями приведены соотношения для вероятностей состояний модуля через произвольное число шагов, а также асимптотическое выражения для вероятностей состояний. Приведены графики изменения вероятностей состояний модуля в зависимости от числа шагов цепи, начальных вероятностей, вероятностей одношаговых переходов стохастической матрицы. Получены  аналитические выражения и соответствующие графики для среднего числа пребываний модуля в конкретном состоянии, которые интерпретируются как среднее число коррекций существенных признаков концептов-представлений. Получены асимптотические соотношения для числа коррекций, а также дана оценка погрешности приближенных асимптотических соотношений.Таким образом, в работе сформулирована весьма общая модель случайного процесса формирования чувственных образов и их преобразования в концепты-представления. Ключевой задачей практического применения модели является анализ логики функционирования конкретной организационно-технической системы и определение на этой основе фигурирующих в модели параметров

МАТЕМАТИЧЕСКИЕ ПРИНЦИПЫ ПОСТРОЕНИЯ РЕЙТИНГОВЫХ СИСТЕМ

Mathematical definition of the rating system is formulated, shown its applicability to a wide class of choice situations on the basis of quantitative characteristics of the object. A study of the general properties of nonlinear, linear and stochastic rating systems, and principles of their construction is undertaken. Some of the issues of resources allocation in the rating systems are consideredСформулировано определение ма-тематической рейтинговой системы, показана ее применимость к широкому классу ситуаций выбора на основании количественных характеристик объ-екта. Предпринято изучение общих свойств нелинейных, линейных и стохастических рейтинговых систем и принципов их построения. Рассмотре-ны некоторые вопросы распределения ресурсов в рейтинговых система

Measurements with Pinhole and Coded Aperture Gamma-Ray Imaging Systems

From a safeguards perspective, gamma-ray imaging has the potential to reduce manpower and cost for effectively locating and monitoring special nuclear material. The purpose of this project was to investigate the performance of pinhole and coded aperture gamma-ray imaging systems at Oak Ridge National Laboratory (ORNL). With the aid of the European Commission Joint Research Centre (JRC), radiometric data will be combined with scans from a three-dimensional design information verification (3D-DIV) system. Measurements were performed at the ORNL Safeguards Laboratory using sources that model holdup in radiological facilities. They showed that for situations with moderate amounts of solid or dense U sources, the coded aperture was able to predict source location and geometry within ~7% of actual values while the pinhole gave a broad representation of source distribution

Study of the Process e+ e- --> omega pi0 --> pi0 pi0 gamma in c.m. Energy Range 920--1380 MeV at CMD-2

The cross section of the process e+ e- --> omega pi0 --> pi0 pi0 gamma has been measured in the c.m. energy range 920-1380 MeV with the CMD-2 detector. Its energy dependence is well described by the interference of the rho(770) and rho'(1450) mesons decaying to omega pi0. Upper limits for the cross sections of the direct processes e+ e- --> pi0 pi0 gamma, eta pi0 gamma have been set.Comment: Accepted for publication in PL