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Сухонос, Володимир Вікторович, Владимир Викторович Сухонос та Volodymyr Viktorovych Sukhonos. "Повноваження глави держави щодо банківської системи: досвід минулого і сучасності". Thesis, Українська академія банківської справи Національного банку України, 2004. http://essuir.sumdu.edu.ua/handle/123456789/60422.
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В державознавстві глава держави визначається як посадова особа або спеціальний державний орган, що здійснює верховне представництво держави у внутрішньополітичному житті країни та у відносинах з іншими державами.<br>In state sciences, the head of state is defined as an official or a special state body exercising the supreme representation of the state in the internal political life of the country and in relations with other states.
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Сухонос, Володимир Вікторович, Владимир Викторович Сухонос та Volodymyr Viktorovych Sukhonos. "Фінансова функція глави держави". Thesis, Українська академія банківської справи Національного банку України, 2010. http://essuir.sumdu.edu.ua/handle/123456789/59336.
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Одним з головних напрямів становлення та розвитку України як
демократичної, соціальної, правової держави є визначення ролі і місця глави
держави у механізмі здійснення державної влади. Інститут глави держави в
Україні має бути не лише гарантом конституційних засад і державного ладу,
а й стати інтеграційним інститутом у системі органів державної влади.
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Mota, Marcelo de Azevedo Telesca. "Das funções de estado, de governo e de administração pública sob uma perspectiva da racionalidade da ordem política." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/185056.
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O Brasil vem atravessando um dos momentos mais conturbados de sua história. Um país fragilizado, dividido e sem um consenso acerca da necessidade urgente de reformas estruturais de base, em especial, acerca do modo como vêm dispostos internamente os seus órgãos políticos de Estado. As instituições estão dispostas irracionalmente e sem coerência, permitindo a indevida cumulação (fusão) das funções de chefia de Estado, de chefia de governo e de gestão da Administração Pública em mãos de uma Presidência da República. Tratam-se de funções com finalidades, princípios e protocolos de trabalho complemente diversos, não podendo jamais serem cumuladas da forma como se encontram. A separação Estado, governo e Administração Pública é, portanto, medida que se impõe e a única saída possível para dotar o país da estabilidade e do consensus necessários para vencer as suas violentas crises.<br>Brazil has been going through one of the most troubled times in its history. A fragile and divided country without a consensus for basic structural reforms that are greatly needed, or rather, the way in which its political organs of state are internally disposed. Institutions are disposed irrationally and without coherence, allowing Presidency of the Republic office cumulates the functions of head of state, head of government and management of public administration. These are functions with completely different purposes, principles and protocols of work, which cannot be cumulated under one office. The separation of State, Government and Public Administration is therefore a necessary measure and the only possible way out to give the country the stability and consensus needed to overcome its violent crises.
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Сухоноc, Володимир Вікторович, Владимир Викторович Сухоноc та Volodymyr Viktorovych Sukhonos. "Роль глави держави у розвитку науки і освіти: конституційно-правовий та історико-теоретичний аспекти". Thesis, Дніпропетровськ, 2005. http://essuir.sumdu.edu.ua/handle/123456789/60347.
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Політична реформа, що розпочалася за ініціативою Президента України, призвела до гострої дискусії у Верховній Раді України стосовно функцій і повноважень глави нашої держави.<br>The political reform, which began on the initiative of the President of Ukraine, has led to an acute discussion in the Verkhovna Rada of Ukraine regarding the functions and powers of the head of our state.
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Martin, Russell McAnally Ken. "Interpolation of head-related transfer functions." Fishermans Bend,Victoria : Defence Science and Technology Organisation, 2007. http://hdl.handle.net/1947/8028.
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Nwosu, Udoka. "Head of state immunity in international law." Thesis, London School of Economics and Political Science (University of London), 2011. http://etheses.lse.ac.uk/599/.
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International events since the landmark Pinochet case, increased human rights advocacy, efforts at a culture of accountability, as well as the recent pro-democratic up-rising in the Arab states sustain impetus for the consideration of Head of state immunity in international law. A naturalist view of international law is that there can be no Head of state immunity for violations of human rights. This popular view proceeds from a theoretical misunderstanding of the positivist concept of immunities resulting in its practical misapplication. However, this naturalist view must be contextualised within the subtleties of international rule-making. It is to this end that the inquiry into Head of state immunity as a concept of customary international law, emergent trends and the formation of a new rule of custom in this regard is necessitated. Thus, this thesis will inquire into the applicability, or otherwise, of Head of state immunity before certain fora, including national courts, international courts, and internationalised courts with view to discerning emergent trends in the practice of Head of state immunity. Thematic in this thesis, is the argument that a provision in the constitutive instrument establishing the jurisdiction of a court which makes irrelevant the fact of official capacity as Head of state, without more, cannot remove the immunities of Heads of states under customary international law. This thesis will undertake its analysis from the perspective of the nature of the constitutive instrument establishing an international court and the extent to which states are bound by the instrument. This thesis will conclude this inquiry by considering the extent to which the trends elicited in the substantive part of the work have changed customary international law and the extent to which there can be said to be a new international law on Head of state immunity.
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Brown, Tara J. (Tara Janet) 1978. "Characterization of acoustic head-related transfer functions for nearby sources." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/8945.
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Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2001.<br>Includes bibliographical references (leaf 60).<br>Head Related Transfer Functions (HRTF) for nearby sources were characterized for human subjects and the Knowles Electronics Manikin for Acoustic Research (KEMAR). The HRTFs were measured in several reverberant room conditions for sound source positions at 0, 45, and 90 degrees in azimuth and 15cm and 1m from the center of the head using maximum-length sequences. The effects of reverberation on interaural time difference, interaural level difference, magnitude response, and spectral content were examined. Results were consistent with acoustic theory. Reverberation was found to decrease ILD, cause comb-filtering, and to distort and add frequency-to-frequency variations to acoustic cues. These affects were most pronounced in room positions with the most reverberant energy.<br>by Tara J. Brown.<br>M.Eng.and S.B.
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Bomhardt, Ramona [Verfasser]. "Anthropometric Individualization of Head-Related Transfer Functions Analysis and Modeling / Ramona Bomhardt." Berlin : Logos Verlag, 2017. http://d-nb.info/1139921665/34.
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Watson, Mark Lee. "A multiple-film magnetoresistive replay head, for audio applications." Thesis, University of Plymouth, 1986. http://hdl.handle.net/10026.1/2548.
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Sensors have been fabricated, which are able to read the information stored on magnetic tape using the anisotropic magnetoresistance effect. These have major advantages over conventional replay heads in that they are multi-track devices, with very small trackwidths. To overcome the signal limitation imposed by the reduced trackwidth the sensor consists of two long magnetoresistive elements which are folded together. By differentially sensing the magnetoresistive signal in each of the elements second harmonic distortion can be removed. To improve the linearity of the magnetoresistive response, the sensors are arranged in such a way that the sensor signal current in each of the elements provides the field necessary to correctly bias the head. A theoretical evaluation of the bias field for all configurations of element has been performed, and was found to fit experimental data. Sixteen tracks are provided across the width of a compact cassette tape, and the design specifically allows the finished sensors to be packaged using standard components. Several performance related features have been considered, and various other fabrication aids included on the photomasks used to build the sensors. These photomasks are provided by the S.E.R.C. from an original computer program written in a graphics language, which defines the size and shape of the various elements making up the device. The heads are fabricated using photolithographic methods, from thin films of several materials all of which are R.F. sputtered. To improve the performance of the sensors, various electro-magnetic properties of the magnetoresistive layers have been measured using apparatus built especially for the purpose. These properties have been optimised by varying the bias potential used in the sputtering process. The finished heads have been tested, and have been found to compare well with the theory derived to describe their performance.
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Reed, Darrin Kiyoshi. "Virtual audio localization with simulated early-reflections and generalized head-related transfer functions." Thesis, Montana State University, 2009. http://etd.lib.montana.edu/etd/2009/reed/ReedD1209.pdf.
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In a natural sonic environment a listener is accustomed to hearing reflections and reverberation. It is conceived that early reflections could reduce front-back confusion in synthetic 3-D audio. This thesis describes experiments which seek to determine whether or not simulated reflections can reduce front-back confusions for audio presented with non-individualized head-related transfer functions (HRTFs) via headphones. To measure the contribution of the reflections, 13 human subjects participated in localization experiments which compared their localization ability with anechoic HRTF processing versus HRTF processing with a single early-reflection. The results were highly subject dependent; some showed improvement while others seemed to be inhibited by the reflections. Statistical analysis of the overall results concluded that a single reflection does not provide a significant difference in localization ability. Although this data rejects the hypothesis of this investigation, some suspicion regarding the contribution of lateral reflections in an auditory environment remains.
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Gerhard, Maike Verfasser], Hartmut [Akademischer Betreuer] Führ, and Hermann [Akademischer Betreuer] [Wagner. "Mathematical analysis of head-related transfer functions / Maike Gerhard ; Hartmut Führ, Hermann Wagner." Aachen : Universitätsbibliothek der RWTH Aachen, 2020. http://d-nb.info/1218788216/34.
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Vitiello, Virginia E. "Executive Functions and Approaches to Learning: Relationships to School Readiness in Head Start Preschoolers." Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_dissertations/469.
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The purpose of this study was to determine whether the effects of executive functions on school readiness outcomes were mediated by approaches to learning in Head Start preschoolers. Executive functions are cognitive skills, including inhibition, cognitive flexibility, and working memory, that are involved in learning as well as regulating behavior (Blair, Granger, & Razza, 2005; Espy, McDiarmid, Cwik, Stalets, Hamby, & Senn, 2004). Approaches to learning include important learning-to-learn skills such as persistence, initiative, and motivation (Fantuzzo, Perry, & McDermott, 2004). Based on previous literature, it was hypothesized that strong executive functions would support the development of positive approaches to learning, which in turn would lead to increased school readiness. To test this, data were collected on 179 four-year-old Head Start preschoolers. Children were assessed on executive functions (cognitive inhibition, cognitive flexibility, and working memory), approaches to learning (using both a teacher rating scale and a direct observation), school readiness, and verbal ability. Results indicated that approaches to learning partially mediated the relationship between executive functions and school readiness, providing support for the study's main hypothesis. Results are discussed in the context of preparing at-risk preschool children for success in school.
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Tsujino, Kosuke. "A study on 3-D sound processing systems based on head-related transfer functions." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/135978.
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Poltera, Carina M. "Numerical analysis of spline generated surface Laplacian for ellipsoidal head geometry." Virtual Press, 2007. http://liblink.bsu.edu/uhtbin/catkey/1371849.
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Electroencephalography (EEG) is a valuable tool for clinical and cognitive applications. EEG allows for measuring and imaging of scalp potentials emitted by brain activity and allows researchers to draw conclusions about underlying brain activity and function. However EEG is limited by poor spatial resolution due to various factors. One reason is the fact that EEG electrodes are separated from current sources in the brain by cerebrospinal fluid (CSF), the skull, and the scalp. Unfortunately the conductivities of these tissues are not yet well known which limits the spatial resolution of EEG.Based on prior research, spatial resolution of the EEG can be improved via use of various mathematical techniques that provide increased accuracy of the representation of scalp potentials. One such method is the surface Laplacian. It has been shown to be a direct approach to improving EEG spatial resolution. Yet this approach depends on a geometric head model and much work has been done on assuming the human head to be spherical.In this project, we will develop a mathematical model for ellipsoidal head geometry based on surface Laplacian calculations by Law [1]. The ellipsoidal head model is more realistic to the human head shape and can therefore improve accuracy of the EEG imaging calculations. We will construct a computational program that utilizes the ellipsoidal head geometry in hopes to provide a more accurate representation of data fits compared to the spherical head models. Also, we will demonstrate that the spline surface Laplacian calculations do indeed increase the spatial resolution thereby affording a greater impact to the clinical and cognitive study community involving EEG.<br>Department of Physics and Astronomy
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Hermansen, Glenn. "A geohydrological investigation of Gold Head Branch State Park, Clay County, Florida." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0025117.
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Hosoe, Seiichiro, Takanori Nishino, Katsunobu Itou, and Kazuya Takeda. "DEVELOPMENT OF MICRO-DODECAHEDRAL LOUDSPEAKER FOR MEASURING HEAD-RELATED TRANSFER FUNCTIONS IN THE PROXIMAL REGION." IEEE, 2006. http://hdl.handle.net/2237/9451.
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Cudmore, Linda J. "Behavioral and electrophysiological investigation of attention and executive functions with and without minor head injury." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0005/NQ45308.pdf.
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Hughet, James. "Binaural Hearing Effects of Mapping Microphone Array's Responses to a Listener's Head-Related Transfer Functions." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/35361.
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This thesis focuses on the mapping of the microphone array’s response to match the characteristics of a human subject’s Head-Related Transfer Function (HRTF). The mapping of the response is first explored with a ‘monaural HRTF matching’ that filters the response independent of the arrival angles. For arbitrary array geometry with the listener external to the acoustic, the monaural HRTF matching did not provide listeners with enough spatial information to precisely localize sound sources. To correct this, a preprocessor control algorithm was added to the HRTF matching, a ‘binaural HRTF matching’ process. The binaural HRTF matching increased the listeners’ performance in perceiving the location of a sound source. With the addition of simulated head movement, the listeners’ perception increased by 20%. An issue with this approach is the use of HRTFs other than the listeners’ measured HRTF, creating a psychoacoustic based error in localization, i.e., front/back confusion.<br>Master of Science
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Peng, Yong. "In-depth accident investigation of pedestrian impact dynamics and development of head injury risk functions." Thesis, Strasbourg, 2012. http://www.theses.fr/2012STRAD024.
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Les piétons comptent parmi les usagers de la route les plus vulnérables dans la mesure où ils ne bénéficient d'aucune protection en cas d'impact avec un véhicule automobile. Plus de 1,17 millions de personnes sont tués sur la route de part le monde dont environ 65% ce piétons. Les blessures de la tête, souvent fatales, concernent environ 30 % des blessures enregistrées. Ces blessures conduisent à des incapacités de longue durée avec un coût sociétal et économique immense. Il est par conséquent essentiel de comprendre aussi bien les mécanismes d'accidents que les mécanismes de blessure de la tête afin d'intervenir sur la conception de la face avant des véhicules automobile. Dans ce contexte l'objet de la présente thèse est d'analyser la répons dynamique du piton en cas d'accident et ce contribuer au développement de critères de blessure de la tête. Dans le but d'étudier l'influence de la position du piéton, de la géométrie de la face avant du véhicule et de sa vitesse initiale sur la cinématique du piéton et les conditions d'impact de la tête, une simulation multi-corps a été mise en place. Les résultats de ces simulations donnent la vitesse et l'angle d'impact de la tête et la position de l'impact sur le véhicule. Cette analyse paramètrique a été conduite sur cinq types de véhicules et pour un modèle humain adulte et enfant de 6 ans et a permis de consolider les connaissances sur la conditions d'impact de la tête en comparaison avec les tests normatifs en vigueur.[...]<br>Pedestrians are regarded as an extremely vulnerable and high-risk group of road users since they are unprotected in vehicle impacts. More than 1.17 million people throughout the world are killed in road traffic accidents each year. Where, about 65% of deaths involve pedestrians. The head injuries in vehicle-pedestrian collisions accounted for about 30% of all reported injuries on different body regions, which often resulted in a fatal consequence. Such injuries can result in disabilities and long-term sequence, which lead to significant social costs. It is therefore important to study the characteristics of pedestrian accidents and understand the head injury mechanism of the pedestrian so as to improve vehicle design for pedestrian protection. The aim of this study is to investigate pedestrian dynamic response and develop head injury risk functions.In order to investigate the effect of pedestrian gait, vehicle front geometry and impact velocity on the dynamic responses of the head, the multi-body dynamic (MBD) models were used to simulate the head responses in vehicle to pedestrian collisions with different vehicle types in terms of head impact point measured with Wrap Around Distance (WAD), head relative velocity and impact angle. A simulation matrix is established using five vehicle types, and two mathematical models of the pedestrians represented a 50th male adult and a 6 year old child as well as seven pedestrian gaits based on typical postures in pedestrian accidents. In order to simulate a large range of impact conditions, four vehicle velocities (30 km/h, 40 km/h, 50 km/h and 60 km/h) are considered for each pedestrian position and vehicle type.A total of 43 passenger car versus pedestrian accidents were selected from In-depth Investigation of Vehicle Accidents in Changsha, China (IVAC) and German In-Depth Accident Study (GIDAS) database for simulation study. According to real-world accident investigation, accident reconstructions were conducted using multi-body system (MBS) pedestrian and car models under MADYMO simulation environment to calculate head impact conditions, in terms of head impact velocity, head position and head orientation. In order to study kinematics of adult pedestrian, relationship curves: head impact time, throw distance, head impact velocity and vehicle impact velocity, were computed and logistic regression models: head impact velocity, resultant angular velocity, HIC value, head contact force and head injuries, were developed based on the results from accident reconstructions.The automobile windshield, with which pedestrians come into frequent contact, has been identified as one of the main contact sources for pedestrian head injuries. In order to investigate the mechanical behavior of windshield laminated glass in the caseof pedestrian head impact, windshield FE models were set up using different combination for the modeling of glass and PVB, with various connection types and two mesh sizes (5 mm and 10 mm). Each windshield model was impacted with a standard adult headform impactor in an LS-DYNA simulation environment, and the results were compared with the experimental data reported in the literatures.In order to assess head injury risks of adult pedestrians, accident reconstructions were carried out by using Hybrid III head model based on the real-world pedestrian accidents. The impact conditions were obtained from the MBS simulation, including head impact velocity, head position and head orientation. They were used to set the initial conditions in a simulation of a Hybrid III FE head model striking a windshield FE model. Logistic regression models, Skull Fracture Correlate (SFC), head linear acceleration, Head Impact Power (HIP), HIC value, resultant angular acceleration and head injuries, were developed to study brain injury risk.{...]
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Hernandez-Ochoa, Abel F. "Conditioning nonlocal steady-state flow on hydraulic head and conductivity through geostatistical inversion." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280279.
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Nonlocal moment equations allow one to render optimum predictions of flow in randomly heterogeneous media deterministically conditional on measured values of medium properties and to assess the corresponding predictive uncertainty. I present a geostatistical inverse algorithm for steady-state flow that makes it possible to further condition such predictions and assessments on measured values of hydraulic head and (or) flux. My algorithm is based on recursive finite-element approximations of exact first and second conditional moment equations. Computational efficiency is enhanced through the use of a direct sparse matrix solver. Hydraulic conductivity is parameterized via universal kriging based on unknown values at pilot points and (optionally) measured values at other discrete locations. Correlation among parameter estimates (or priors) is considered in the universal kriging equations. Optimum unbiased inverse estimates of natural log hydraulic conductivity, head and flux are obtained by minimizing a calibration criterion, composed of residuals of head or (and) flux and (possibly) log conductivity, using the Levenberg-Marquardt algorithm. Statistical parameters characterizing the natural variability of hydraulic conductivity can also be estimated using this algorithm. I illustrate the method for superimposed mean uniform and convergent flows in a bounded two-dimensional domain under various conditions for a range of parameters. My examples illustrate how conductivity and head data act separately or jointly to reduce parameter estimation errors and model predictive uncertainty. Over-parameterization is seen to create zones of high mean conductivity, in which flux prediction is more uncertain than is in other regions. It is found that a regular distribution of pilot points works better than does an irregular layout and that the number of pilot points should be as close as possible to the number of head data while maintaining parameters reasonably uncorrelated. Head and flux predictions are very satisfactory for cases with either log conductivity variance or integral scale between one and four, though prediction quality deteriorates with either larger variances or shorter integral scales. The method may perform satisfactorily in cases with no conductivity measurements and only a few head data.
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See, Daniel. "The decalogue : state law and its social functions in Ancient Israel." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264640.
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Jacobson, John W. Laymon Ronald L. "A comprehensive study of the functions of educational service regions and educational service centers in Illinois." Normal, Ill. Illinois State University, 1988. http://wwwlib.umi.com/cr/ilstu/fullcit?p8907675.
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Thesis (Ed. D.)--Illinois State University, 1988.<br>Title from title page screen, viewed September 22, 2005. Dissertation Committee: Ronald L. Laymon (chair), Norman T. Endsley, Patricia H. Klass, Mary Ann Lynn, Thomas W. Nelson. Includes bibliographical references (leaves 165-171) and abstract. Also available in print.
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Song, Shin-Tai. "Limit state analysis and performance assessment of fixed-head concrete piles under lateral loading /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.
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Nduwimana, Alexis. "Confinement effect on semiconductor nanowires properties." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19865.
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Thesis (Ph.D)--Physics, Georgia Institute of Technology, 2008.<br>Committee Chair: Chou, Mei-Yin; Committee Member: First,Phillip; Committee Member: Gao, Jianping; Committee Member: Landman, Uzi; Committee Member: wang, Xiao-Qian.
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Ishkhanyan, Tigran. "Quantum two-state level-crossing models in terms of the Heun functions." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCK026/document.
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La thèse est consacrée au problème fondamental de l'excitation et de la manipulation de systèmes quantiques à spectre d'énergie discret, via des champs lasers externes. Nous examinons le problème semi-classique à deux états quantiques, dépendant du temps, lorsque le champ électromagnétique externe est résonant ou quasi résonant pour deux des nombreux niveaux du système. La thèse est centrée sur la description analytique de l'évolution non adiabatique des systèmes quantiques soumis à une excitation par des configurations de champs avec croisements de niveaux. Dans la présente thèse, nous classifions l’ensemble complet des modèles quantiques à deux états semi-classiques dépendants du temps, qui peuvent être résolus en cinq fonctions de la classe de Heun.Les principaux résultats de la thèse sont :1. Au total, 61 classes infinies de modèles à deux états (i.e. les configurations de champ laser externe) solubles en termes de fonctions de Heun générale et confluentes sont dérivées.2. Dans ces classes infinies, trois sous-modèles originaux avec croisements de niveaux sont identifiés: l'un décrit les croisements infinis de résonance (périodiques), l'autre décrit les croisements de résonance asymétrique avec un temps de processus fini et le dernier décrit les processus de croisements infinis de résonance asymétrique. Le comportement du système quantique à deux états dans ces configurations de champ est analysé de manière exhaustive.3. Les solutions des équations de Heun en termes de fonctions bêta incomplètes, de fonctions hypergéométriques confluentes de Kummer et de fonctions Hermite d'ordre non entier sont construites.4. Des solutions analytiques du problème quantique à deux états sont projetées sur les équations d'onde relativistes et non relativistes : de nouveaux potentiels pour les équations de Schrödinger et de Klein-Gordon sont dérivés et résolus<br>The thesis is devoted to the fundamental problem of excitation and manipulation of quantum systems, having discrete energy spectrum, via external laser fields. We examine the semiclassical time- dependent quantum two-state problem, when the external electromagnetic field is resonant or quasi-resonant for some two of many levels of the system. The focus of the thesis is on the analytic description of the non- adiabatic evolution of quantum systems subject to excitation by level-crossing field configurations. In the present thesis we classify the complete set of the semiclassical time-dependent quantum two-state models solvable in terms of the five function of the Heun class.Main results of the thesis are:1. In total 61 infinite classes of two-state models (i.e. external laser field configurations) solvable in terms of general and confluent Heun functions are derived.2. In these infinite classes three original level-crossing submodels are identified: one describes infinite (periodical) crossings of resonance, one describes asymmetric resonance crossing with a finite time of process and the last one describes infinite asymmetric resonance crossing process. The behavior of the two-state quantum system under these field configurations is comprehensively analyzed.3. Solutions of the Heun equations in terms of incomplete Beta functions, Kummer confluent hypergeometric functions and non-integer-order Hermite functions of a shifted and scaled argument are constructed.4. Analytic solutions of the quantum two-state problem are projected on the relativistic and non-relativistic wave-equations: new potentials for the Schrödinger and Klein-Gordon equations are derived and solved
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Cakmakci, Ozan. "MESHFREE APPROXIMATION METHODS FOR FREE-FORM OPTICAL SURFACES WITH APPLICATIONS TO HEAD-WORN DISPLAYS." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3420.
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Compact and lightweight optical designs achieving acceptable image quality, field of view, eye clearance, eyebox size, operating across the visible spectrum, are the key to the success of next generation head-worn displays. The first part of this thesis reports on the design, fabrication, and analysis of off-axis magnifier designs. The first design is catadioptric and consists of two elements. The lens utilizes a diffractive optical element and the mirror has a free-form surface described with an x-y polynomial. A comparison of color correction between doublets and single layer diffractive optical elements in an eyepiece as a function of eye clearance is provided to justify the use of a diffractive optical element. The dual-element design has an 8 mm diameter eyebox, 15 mm eye clearance, 20 degree diagonal full field, and is designed to operate across the visible spectrum between 450-650 nm. 20% MTF at the Nyquist frequency with less than 3% distortion has been achieved in the dual-element head-worn display. An ideal solution for a head-worn display would be a single free-form surface mirror design. A single surface mirror does not have dispersion; therefore, color correction is not required. A single surface mirror can be made see-through by machining the appropriate surface shape on the opposite side to form a zero power shell. The second design consists of a single off-axis free-form mirror described with an x-y polynomial, which achieves a 3 mm diameter exit pupil, 15 mm eye relief, and a 24 degree diagonal full field of view. The second design achieves 10% MTF at the Nyquist frequency set by the pixel spacing of the VGA microdisplay with less than 3% distortion. Both designs have been fabricated using diamond turning techniques. Finally, this thesis addresses the question of what is the optimal surface shape for a single mirror constrained in an off-axis magnifier configuration with multiple fields? Typical optical surfaces implemented in raytrace codes today are functions mapping two dimensional vectors to real numbers. The majority of optical designs to-date have relied on conic sections and polynomials as the functions of choice. The choice of conic sections is justified since conic sections are stigmatic surfaces under certain imaging geometries. The choice of polynomials from the point of view of surface description can be challenged. A polynomial surface description may link a designer s understanding of the wavefront aberrations and the surface description. The limitations of using multivariate polynomials are described by a theorem due to Mairhuber and Curtis from approximation theory. This thesis proposes and applies radial basis functions to represent free-form optical surfaces as an alternative to multivariate polynomials. We compare the polynomial descriptions to radial basis functions using the MTF criteria. The benefits of using radial basis functions for surface description are summarized in the context of specific head-worn displays. The benefits include, for example, the performance increase measured by the MTF, or the ability to increase the field of view or pupil size. Even though Zernike polynomials are a complete and orthogonal set of basis over the unit circle and they can be orthogonalized for rectangular or hexagonal pupils using Gram-Schmidt, taking practical considerations into account, such as optimization time and the maximum number of variables available in current raytrace codes, for the specific case of the single off-axis magnifier with a 3 mm pupil, 15 mm eye relief, 24 degree diagonal full field of view, we found the Gaussian radial basis functions to yield a 20% gain in the average MTF at 17 field points compared to a Zernike (using 66 terms) and an x-y polynomial up to and including 10th order. The linear combination of radial basis function representation is not limited to circular apertures. Visualization tools such as field map plots provided by nodal aberration theory have been applied during the analysis of the off-axis systems discussed in this thesis. Full-field displays are used to establish node locations within the field of view for the dual-element head-worn display. The judicious separation of the nodes along the x-direction in the field of view results in well-behaved MTF plots. This is in contrast to an expectation of achieving better performance through restoring symmetry via collapsing the nodes to yield field-quadratic astigmatism.<br>Ph.D.<br>Optics and Photonics<br>Optics and Photonics<br>Optics PhD
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Causa, Federica. "Hermite-Gauss functions in the analysis of a category of semiconductor optical devices." Thesis, University of Bath, 1998. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242526.
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Eggen, B. R. "Potential energy functions for elemental solids and their application to group 14 elements." Thesis, University of Sussex, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332664.
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Chang, Byeong-Yun. "Estimation Techniques for Nonlinear Functions of the Steady-State Mean in Computer Simulation." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4917.
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A simulation study consists of several steps such as data collection, coding
and model verification, model validation, experimental design, output data analysis,
and implementation. Our research concentrates on output data analysis. In this field,
many researchers have studied how to construct confidence intervals for the mean u
of a stationary stochastic process. However, the estimation of the value of a nonlinear
function f(u) has not received a lot of attention in the simulation literature. Towards
this goal, a batch-means-based methodology was proposed by Munoz and Glynn (1997).
Their approach did not consider consistent estimators for the variance of the point
estimator for f(u). This thesis, however, will consider consistent variance estimation
techniques to construct confidence intervals for f(u). Specifically, we propose methods
based on the combination of the delta method and nonoverlapping batch means
(NBM), standardized time series (STS), or a combination of both. Our approaches
are tested on moving average, autoregressive, and M/M/1 queueing processes. The
results show that the resulting confidence intervals (CIs) perform often better than
the CIs based on the method of Munoz and Glynn in terms of coverage, the mean of
their CI half-width, and the variance of their CI half-width.
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Müller, Frank Henrik. "A finite-state approach to shallow parsing and grammatical functions annotation of German." [S.l. : s.n.], 2005.
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Adduri, Phani R. "ROBUST ESTIMATION OF RELIABILITY IN THE PRESENCE OF MULTIPLE FAILURE MODES." Wright State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=wright1166045748.
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Gebremeskel, Wintana Kidane. "Sitting head of state immunity for crimes under international law : conflicting obligations of ICC member states?" University of the Western Cape, 2016. http://hdl.handle.net/11394/5515.
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Magister Legum - LLM<br>Sitting head of state immunity for crimes under international law has been a very controversial issue in recent times. On the one hand, the debate bears that personal immunity has been renounced for crimes under international law. On the other hand, the advocates of personal immunity claim that the principle of immunity is still persisting under customary International law. Although the International Criminal Court (ICC) is a treaty based court, it is able to extend its jurisdiction to non-state parties to the Rome Statute through a referral by the United Nations Security Council. Lacking its own enforcement body the ICC relies on the cooperation of other states for arrest and surrender of those it indicts. The extension of the court's jurisdiction to non-state parties, such as the case of Sudanese President Omar Al Bashir, has led to the reluctance of state parties to the Rome Statue to effect arrest and surrender citing a 'dilemma between two conflicting obligations'. This paper analyses the legal status of personal immunity before different fora such as International tribunals, foreign domestic courts and under customary international law. It also critically examines the legal basis for the alleged conflicting obligations of state parties. The paper at the end concludes that there is no conflicting obligation for states parties to fully co-operate with the ICC and the lack of co-operation in the arrest and surrender of a sitting head of state is inconsistent with international law particularly with United Nation Charter and the Rome Statute.<br>German Academic Exchange Service (DAAD)
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Williams, Kathleen Anne. "Resting State Connectivity in the Rat Brain." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14059.
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Functional MRI is a method of imaging changes in blood oxygenation that accompany neural activity in the brain. A specific area within fMRI studies investigates what the brain is doing when it is not being stimulated. It is postulated that there are distinctly separate regions of the brain that are connected based upon functional relations and that these connected regions synchronously communicate even during rest. Resting state connectivity has become a tool to investigate neurological disorders in humans without specific knowledge of the mechanisms that correlate neural activity with brain metabolism and blood flow. This work attempts to characterize resting state connectivity in the rat brain to establish a model that will help elucidate the relationship between functional connectivity, as measured with fMRI, and brain function. Four analysis techniques, power spectrum estimation, cross correlation analysis, principle component analysis, and independent component analysis, are employed to examine data acquired during a non-stimulation, single-slice, gradient echo EPI sequence in search of functionally connected, spatially distant regions of the rat brain.
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Borole, Thabo Daniel. "Management and leadership functions of heads of departments in technical high schools / Thabo Daniel Borole." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4279.
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The research study departs from the, angle that heads of department occupy an important position at the interface of management and delivery of
education. Their functions range from teaching to managing the school's departments in a diligent way. It was assumed that failure for heads of department to be part of the leadership in the school and at the same time manage their department and engage in teaching duties would result in a school becoming dysfunctional.
A literature study was conducted to explore the leadership and management functions of the heads of department and to investigate the specific
challenges facing heads of department in technical high schools. The empirical research consisted of a questionnaire survey to determine the views of the heads of department on their management and leadership functions and the challenges they experience in executing their tasks. It involved 75 heads of department in 13 Technical High School in the North West Province.
The major findings of the research study reveal that heads of department experience challenges with a heavy workload, find it difficult to strike a balance between teaching duties and management duties and also face challenges in executing their functions even if a job description exists. It was also revealed that respondents strongly agree with the African cultural perspective concerning the ideal leadership characteristics of heads of department. Generally the study indicated that heads of department require
training aimed at meeting the specific needs of middle managers.<br>Thesis (M.Ed.)--North-West University, Potchefstroom Campus, 2010.
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Varaška, Mantas. "The problem of term limits of the head of state in various forms of government: comparative aspect." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120328_105219-95780.
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The Dissertation covers the aspect of term limits of head of state and its links with the principles of national sovereignty, separation of powers and supremacy of the constitution in various forms of state government.
The analysis of the concept of powers and term limits of head of state, put into the context of development of the global legal thought, uncovers progress in the scientific understanding of the concept and paves the way to the key arguments of the Paper (the right to establish term limits of authorities lies with the nation (John Locke); the term limit of authority is inversely proportional to the greatness of power (Charles Montesquieu).
The study into the features and dynamics of constitutional regulation of term limits of head of state is based on the analysis of the relevant provisions in over 500 constitutions; as a result, the study establishes the development trends in the definition of term limits enshrined in the said constitutions. Another part of the study looks into the reasons behind the violations of constitutional provisions on term limits of head of state and analyses the dynamics of the said violations in monarchies and republics as forms of government, paying attention to the criterion of greatness of authority of head of state.
On the basis of the present research, the author establishes the effectiveness of direct and inverse application of the rule formulated by Charles Montesquieu (the greatness of power must be compensated by the brevity... [to full text]<br>Disertacijoje atskleistas valstybės vadovo įgaliojimų trukmės aspektas ir jo sąsajos su Tautos suvereniteto, valdžių padalijimo, Konstitucijos viršenybės principais valstybės valdymo formose.
Analizuojant valdžios ir valstybės vadovo įgaliojimų trukmės sampratą pasaulio teisinės minties raidoje, nustatytas jos mokslinio suvokimo progresas ir esminiai konstatuojamieji teiginiai (teisė nustatyti valdžios įgaliojimų trukmę priklauso tautai (J. Locke), valdžios įgaliojimų trukmė atvirkščiai proporcinga įgaliojimų dydžiui (Sh. Montesquieu).
Tiriant valstybės vadovo įgaliojimų trukmės konstitucinio reguliavimo ypatumus ir dinamiką, išnagrinėtos ir apibendrintos daugiau nei 500 konstitucijų aktualios nuostatos, nustatytos jose užfiksuotų įgaliojimų trukmių apibrėžimų raidos tendencijos. Kitame tyrime nagrinėtos valstybės vadovo įgaliojimų trukmės konstitucinių nuostatų pažeidimų priežastys, dinamika monarchijos bei respublikos valdymo formose, atsižvelgiant į vadovų įgaliojimų apimties kriterijų.
Remiantis tyrimų duomenimis, nustatytas Sh. Montesquieu teiginio (kuo valdžios įgaliojimai didesni, tuo trumpiau ji turi valdyti) tiesioginio ir atvirkštinio taikymo efektyvumas. Patvirtinta mokslinio tyrimo prielaida, jog valstybės vadovo įgaliojimų trukmės konstitucinių nuostatų pažeidžiamumas yra proporcingas jo įgaliojimų apimčiai. Šią konstitucinio reguliavimo problemą siūloma spręsti naudojant atvirkštinį Sh.Montesquieu teiginį (kuo valdžios įgaliojimai menkesni, tuo jų trukmė yra... [toliau žr. visą tekstą]
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Cross, Bernard. "Monarchy in the democratic age : the head of state debate in Britain : a constitutional and comparative analysis." Thesis, London Metropolitan University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435592.
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Rasumow, Eugen [Verfasser], Simon [Akademischer Betreuer] Doclo, Matthias [Akademischer Betreuer] Blau, and Dorte [Akademischer Betreuer] Hammershoi. "Synthetic reproduction of head-related transfer functions by using microphone arrays / Eugen Rasumow. Betreuer: Simon Doclo ; Matthias Blau ; Dorte Hammershoi." Oldenburg : BIS der Universität Oldenburg, 2015. http://d-nb.info/1071947257/34.
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Sandvik, Fredrik, and Olle Tingstam. "Design and Prototyping of a Scalable Contactor Platform Adapted to State-of-the-Art Functions." Thesis, Linköpings universitet, Datorteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-121775.
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The goal of the thesis is to investigate and propose a new design for a contactor platform, both in terms of hardware and embedded software, which incorporates support to implement new state-of-the-art functions. The platform must support a wide range of contactors from basic ones with only core functions to advanced contactors using modern microcontrollers to provide efficient, quick and reliable operation. Further, a significant focus of the thesis is on the interaction between electrical engineering and computer engineering. The electronics needs to interact seamlessly with a microcontroller running a versatile software to provide industry-leading performance. To achieve this, the software and hardware is evaluated with focus to develop an optimal platform. The proposed embedded software uses development techniques rarely used in embedded applications such as UML code generation, compile-time initiation of objects and an object-oriented design, while maintaining the performance of traditional embedded programming. The thesis also provides suggestions to hardware changes to further improve to the contactor’s operation.
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Sengupta, Abhinav, and Alexey Gurov. "Evaluating the effectiveness of collisionavoidance functions using state-of-the-artsimulation tools for vehicle dynamics." Thesis, KTH, Fordonsdynamik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-159262.
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The main goal of this work is to gain knowledge of how and to what extent state-of-the-artsimulation tools can be used in a conceptual development phase for vehicle dynamics control atVolvo Car Corporation (VCC).The first part of the thesis deals with an evaluation of vehicle dynamics simulation tools and theiruses. The three simulation tools selected for the study, namely Mechanical Simulation CarSim 8.2.1,IPG CarMaker 4.0.5, and VI-Grade CarRealTime V14, are briefly described and discussed. In order toevaluate and compare these tools with respect to application for vehicle dynamics control, a criterialist is developed covering aspects such as tool requirements and intended usage. Based on thecriteria list and certain identified drawbacks, a ranking of the tools is made possible. Furthermore,the process of developing vehicle models for the different tools is discussed in detail, along with theprocedure of validating the vehicle models.In the second part, the concept of Collision Avoidance Driver Assistance (CADA) function isintroduced and possible approaches for developing CADA functions are discussed in brief. It isimportant to note that the CADA functions in this work are based on cornering the vehicle i.e.maneuvering around the threat, rather than solely reducing vehicle speed. A number ofimplementations of the functions are developed in Simulink. A frequency analysis of a simplifiedlinear vehicle model is performed to investigate the influence of steering, differential braking, andtheir combination on the resultant lateral displacement of the vehicle during an evasive maneuver.The developed CADA functions are then simulated using the vehicle simulation tools. Two specificmetrics - Lateral Displacement gain and DeltaX - are formulated to evaluate the effectiveness of theCADA functions. Based on these metrics, the assistance obtained due to the functions for a specificevasive maneuver is compared.From the evaluation process of the three tools, two were considered suitable for the purpose ofsimulating collision avoidance functions. The evaluation of the CADA functions demonstrates thatcombined assistive steering with differential braking provides considerable assistance in order toavoid collisions. The simulation results also present interesting trends which provide a usefuldirection regarding the conditions for intervention by such collision avoidance functions during anevasive maneuver. The use of simulation tools makes it possible to observe these trends and utilizethem in the development process of the functions.
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Faden, Abdulrahman Khalid. "Development of Safety Performance Functions For Two-Lane Rural Highways in the State of Ohio." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1591976280554876.
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Awkward-Rich, Leah. "“Head Start Works,” But Why? Understanding the Persistence of an American Welfare Program." Oberlin College Honors Theses / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1495815773647501.
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Uzinski, Julio Cezar [UNESP]. "A state-space parameterization for perfect-reconstruction wavelet FIR filter banks with special orthonormal basis functions." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/146716.
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Previous issue date: 2016-11-25<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Esta tese apresenta uma parametrização no espaço de estados para a transformada wavelet rápida. Esta parametrização é baseada em funções de base ortonormal e filtros de resposta finita ao impulso simultaneamente, uma vez que, a transformada rápida wavelet é um algoritmo que consiste em decompor sinais no domínio do tempo em sequências de coeficientes baseados numa base ortogonal de funções wavelet. Deste modo, vantagens apresentadas por ambas as propostas são incorporadas. Modelos de resposta finita ao impulso têm propriedades atrativas como vantagens computacionais e analíticas, garantia de estabilidade BIBO e robustez para a mudança de alguns parâmetros, dentre outras. Por outro lado, séries de funções de base ortonormal têm características que as fazem atrativas para a modelagem de sistemas dinâmicos, como ausência de recursão da saída, a não necessidade de se conhecer previamente a estrutura exata do vetor de regressão, possibilidade de aumentar a capacidade de representação do modelo aumentando-se o número de funções ortonormais utilizadas, desacoplamento natural das saídas em modelos multivariáveis; tolerância a dinâmicas não modeladas. Além disso, a realização no espaço de estados é mínima. A contribuição deste trabalho consiste no desenvolvimento de uma realização no espaço de estados para bancos de filtros wavelet, em que há a presença explícita de parâmetros que podem ser livremente ajustados mantendo as propriedades de reconstrução perfeita e ortonormalidade. Para ilustrar o funcionamento e as vantagens da técnica proposta, alguns exemplos de decomposição de sinais no contexto de processamento de sinais mostrando que ela proporciona os mesmos coeficientes wavelet que a transformada wavelet rápida, e uma aplicação em controle através de realimentação dinâmica de estados também são apresentados nesta tese.<br>This thesis presents a state-space parameterization for the fast wavelet transform. This parameterization is based on orthonormal basis functions and finite impulse response filters at the same time, since the fast wavelet transform is an algorithm, which converts a signal in the time domain into a sequence of coefficients based on an orthogonal basis of small finite wavelet functions. Advantages presented by both proposals are incorporated. Finite impulse response systems have attractive properties, for instance, computational and analytical advantages, BIBO stability and robustness guarantee to some parameter changes, and others. On the other hand, orthonormal basis functions have some characteristics that make them attractive for dynamic systems modeling, examples are, output recursion absence, not requiring prior regression vector exact structure knowledge; possibility of increasing the model representation capacity by increasing the number of orthonormal functions employed; natural outputs uncoupling in multivariable models; tolerance to unmodeled dynamics, and others. Furthermore, the state-space realization is minimal. The contribution of this work consists in the development of a state-space realization for a wavelet filter bank, with the explicit presence of the parameters that can be freely adjusted, keeping perfect-reconstruction and orthonormality guarantees. In order to illustrate advantages and how the proposed technique works, some decomposition examples in signal processing context are presented showing that it provides the same wavelet coefficients as the fast wavelet transform, and an application on dynamic state feedback control is also presented in this thesis.<br>CNPq: 160545/2013-7
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Uzinski, Julio Cezar. "A state-space parameterization for perfect-reconstruction wavelet FIR filter banks with special orthonormal basis functions /." Ilha Solteira, 2016. http://hdl.handle.net/11449/146716.
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Orientador: Francisco Villarreal Alvarado<br>Resumo: Esta tese apresenta uma parametrização no espaço de estados para a transformada wavelet rápida. Esta parametrização é baseada em funções de base ortonormal e filtros de resposta finita ao impulso simultaneamente, uma vez que, a transformada rápida wavelet é um algoritmo que consiste em decompor sinais no domínio do tempo em sequências de coeficientes baseados numa base ortogonal de funções wavelet. Deste modo, vantagens apresentadas por ambas as propostas são incorporadas. Modelos de resposta finita ao impulso têm propriedades atrativas como vantagens computacionais e analíticas, garantia de estabilidade BIBO e robustez para a mudança de alguns parâmetros, dentre outras. Por outro lado, séries de funções de base ortonormal têm características que as fazem atrativas para a modelagem de sistemas dinâmicos, como ausência de recursão da saída, a não necessidade de se conhecer previamente a estrutura exata do vetor de regressão, possibilidade de aumentar a capacidade de representação do modelo aumentando-se o número de funções ortonormais utilizadas, desacoplamento natural das saídas em modelos multivariáveis; tolerância a dinâmicas não modeladas. Além disso, a realização no espaço de estados é mínima. A contribuição deste trabalho consiste no desenvolvimento de uma realização no espaço de estados para bancos de filtros wavelet, em que há a presença explícita de parâmetros que podem ser livremente ajustados mantendo as propriedades de reconstrução perfeita e ortonormalidade. ... (Resumo completo, clicar acesso eletrônico abaixo)<br>Doutor
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Kojima, Takeo. "Correlation functions for an impenetrable Bose gas with Neumann or Dirichlet boundaries at the ground state." 京都大学 (Kyoto University), 1997. http://hdl.handle.net/2433/202422.
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Liverani, Andrea. "Civil society in a weak state : the political functions of associational life in Algeria 1987-2005." Thesis, London School of Economics and Political Science (University of London), 2007. http://etheses.lse.ac.uk/2724/.
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This study analyses the significance of Algeria's associative sphere in the context of the state's attempts to retain legitimacy. Starting from a critique of portrayals of Algerian 'civil society' as a force conducive to democratization, and by framing the period under study in a broader historical perspective, the thesis examines the changing relationship of the state to voluntary associations in both the colonial and post-colonial eras. It considers the place of associational life in the political economy of economic reform, investigating the role it played in facilitating the state's retreat from service provision. Consideration of the notion that civic associations shape people's propensity towards cooperation and collective action, facilitating democratic politics through the injection of trust and social capital, provides the starting point for analyzing their internal dynamics and the incentives driving their functioning. A further examination of the social bases of the associative sphere then leads to questioning its independence from the state, and highlights the role of the associative sector in tempering the fracture between the state and those social groups that most suffered from the collapse of Algeria's post colonial political framework. A critical examination of the proposition that civil society organisations legitimate and strengthen representative political institutions such as parties and parliament provides the opportunity to show how the associative sphere contributed to preserving the dominance of the executive in the political system despite the introduction of multi-partism. Finally, the study analyses donors' use of advocacy and service-delivery associations in democracy-promotion programmes, arguing that their focus on the country's 'civil society' contributed to the state's efforts to preserve its international legitimacy. In this light, rather than a driver of democratic change, the associative sphere appears as one of the elements of conservation used by a weakened state to reacquire legitimacy and reinforce its capacity to secure voluntary acquiescence in its rule.
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Chen, Yixiong. "Mixed-state correlation functions of twist fields in two-dimensional integrable models of quantum field theory." Thesis, King's College London (University of London), 2016. http://kclpure.kcl.ac.uk/portal/en/theses/mixedstate-correlation-functions-of-twist-fields-in-twodimensional-integrable-models-of-quantum-field-theory(fcf5a346-7c3a-445e-b249-e66134815d25).html.
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The aim of this thesis is to evaluate correlation functions of twist elds in mixed states in two-dimensional integrable models of quantum eld theory (QFT). We construct the 'Liouville space' for general models of QFT in general mixed states associated to diagonal density matrices, and de ne mixed-state form factors in Liouville space. We then specialize to two concrete models: the Ising model and U(1) Dirac model. Using a novel method based on deriving and solving a system of nonlinear functional di erential equations, we obtain exact mixed-state form factors of twist elds, in both models. These form factors are in agreement with nite-temperature form factors which correspond to the thermal Gibbs state. We then write down mixed-state correlation functions for these elds in terms of the full form factor expansions with respect to the vacuum in Liouville space. Under weak analytic conditions on the eigenvalues of the density matrix, they are exact large-distance expansions. We apply the results in the Ising model to analyze large-distance behaviours of two-point functions of order and disorder elds in generalized Gibbs ensembles and nonequilibrium steady states. In particular, we nd non-equilibrium form factors have branch cuts in rapidity space and the leading large-distance behaviour of two-point functions admit oscillations in the log of the distance between elds. Using the results in the Dirac model and the relation between the Ising and Dirac models, we deduce the Reyi entropy for even integer n. Finally, as an extra work, we deduce the high- and low-temperature limit of the exact current at non-equilibrium steady states in general integrable models of quantum eld theory with diagonal scatterings.
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Wattanataweekul, Hathaikarn. "Convex analysis and flows in infinite networks." Diss., Mississippi State : Mississippi State University, 2006. http://sun.library.msstate.edu/ETD-db/ETD-browse/browse.
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Goyal, Rahul. "FLOW FIELD IN A HIGH HEAD FRANCIS TURBINE DRAFT TUBE DURING TRANSIENT OPERATIONS." Doctoral thesis, Luleå tekniska universitet, Strömningslära och experimentell mekanik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-66297.
Full textAbstract:
Hydroelectricity plays an important role to balance the stability of grid network. In order to improve the stability of presently high loaded grids, hydropower plants are being operated over a wide range of operations and experiencing frequent start-stop, load rejection, and load acceptance. The turbines need to sustain sudden change in their operating condition to balance the grid frequency. Francis turbines have been widely used because of their wider operating range and higher stability in operation during rapid load variation. This has resulted in severe damage to the turbines as they are not normally designed to operate under such transient conditions. Several low and high frequency pressure fluctuations prevail during transients operating conditions. Generally, wall pressure measurements are performed which may not provide sufficient information to investigate the flow instabilities related to these fluctuations. Thus, the main objective of the present work is to simplify and perform optical measurements in a turbine during transient operating conditions to investigate the flow field. The measurements have been performed at the Water Power Laboratory using a high head model Francis turbine. The turbine is a 1:5.1 scale down model of a prototype operating at the Tokke Power Plant, Norway. The model runner diameter, net head, and discharge at the best efficiency point (BEP) were 0.349 m, 12 m, and 0.2 m3 s-1, respectively. A total ten pressure sensors were mounted at different locations namely, turbine inlet, vaneless space, and draft tube. The data were acquired at a sampling rate of 5 kHz. The instruments and sensors have been calibrated according to guidelines available in IEC standards. The determined total uncertainty in the measurement of hydraulic efficiency was ±0.15% at BEP condition. The velocity measurements in the draft tube cone were performed using a 2D PIV system and the images were sampled at a rate of 40 Hz. Steady state measurements were carried out considering the realistic design and off-design operating conditions of the prototype turbine. Therefore, the angular speed of the runner was maintained constant for all steady state conditions during the measurements. The maximum hydraulic efficiency (92.4%) was observed at nED = 0.18, QED = 0.15, and a = 9.8º, which is named BEP. It is observed that the turbine experiences significant pressure fluctuations at the vaneless space, runner, and the draft tube. The fluctuations due to rotor-stator interaction (RSI) were observed to be most dominating at high load condition, however, fluctuations due to the rotating vortex rope (RVR) at part load (PL) condition. Two different modes (synchronous and asynchronous) modes of vortex rope are observed at PL condition of the turbine. An asymmetry in the flow leaving the runner was detected at both design and off-design conditions, with a stronger effect during off-design operating condition. Numerical simulations of the model turbine were carried out at PL operating condition. The simulations were performed using two turbulence models, standard k-ε and SST k-ω, with high-resolution advection scheme. The numerical pressure values obtained with both standard k-ε model and SST k-ω showed a small difference with the experimental values. The amplitudes of numerical pressure values were higher (~2.8%) in the vaneless space and lower (~5.0%) in the draft tube than the experimental values. The frequencies of the RSI and RVR were well captured in the turbine but the amplitudes were overestimated. During load rejection from BEP to PL, the plunging mode of the vortex rope was observed to appear first in the system than that of the rotating mode. Whereas during the load acceptance from PL to BEP, both the modes were observed to disappear simultaneously from the system. In the velocity data, the axial velocity only contributed to the development of the plunging mode and radial velocity to the rotating mode. The region of low velocity, stagnation point, flow separation, recirculation, oscillating flow and high axial velocity gradients were well captured in the system during the transients. The induced high-velocity gradients during the load acceptance from BEP to HL was observed to develop a vortex core in the draft tube. During startup and shutdown, the guide vanes angular position was moved from one to another steady state condition to achieve the minimum load condition of the turbine. At this condition, the generator of the turbine was magnetized at the synchronous speed during startup and shutdown, respectively. The frequency of wave propagation was observed to vary with the runner angular speed during startup and complete shutdown of the turbine. Comparatively high-pressure fluctuations in the draft tube were observed during the guide vane movement from the high discharge conditions. Some unsteady phenomena such as the formation of dead velocity zone, backward flow, and flow oscillations were observed during startup and shutdown of the turbine. The current work has been also used to continue a series of workshops, i.e., Francis-99. The first workshop was held on December 2014 with the cooperation of LTU and NTNU. The measurements performed in this work were used for the second workshop which was held on December 2016. The investigations presented in this thesis will be further explored in the third workshop scheduled for December 2018.
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