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Jewell, Geraint Wyn. "The computer-aided design and analysis of impulse magnetizing fixtures." Thesis, University of Sheffield, 1992. http://etheses.whiterose.ac.uk/1876/.
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The magnetization of the permanent magnet components is a key enabling technology in the production of permanent magnet based electromagnetic devices. Although recent advances in the properties of rare-earth magnets, offer considerable scope for enhanced device performance, in order to realise such improvements, the permanent magnet must be magnetized to saturation. This is a considerably more onerous requirement for the rare-earth materials as compared to the more established permanent magnet materials, particularly if the preferred production route of single step, multipole magnetization of either the part or fully assembled device is to be employed. To enable accurate design of magnetizing systems for such demanding applications, an integrated computer-aided design methodology has been developed. It is based on both analytical and finite element field calculation techniques, and spans the entire design synthesis from initial specification through to the assessment of the performance of the final device into which the magnetized magnet is incorporated. Particular attention is directed towards the role of eddy-currents during the impulse magnetization, and to this end a transient, electric circuit coupled finite element simulation is described. A case study is presented on the relative merits of magnetizing the anisotropic NdFeB magnet of a brushless D.0 motor at various stages during the motor production. A further case study on the magnetization of an isotropic bonded NdFeB multipole rotor highlights the additional considerations that arise in the design of magnetizing fixtures for isotropic materials. Finally, the utility of the methodology in designing a limited range of axial multipole fixtures is demonstrated with a case study on a fine pole-pitch axially magnetized ring magnet.
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Campbell, Roy Lee. "Performance assessment of the finite impulse response Adaptive Line Enhancer." Diss., Mississippi State : Mississippi State University, 2002. http://library.msstate.edu/etd/show.asp?etd=etd-05222002-085151.
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Bialek, Thomas Owen. "Evaluation and modeling of high-voltage cable insulation using a high-voltage impulse." Diss., Mississippi State : Mississippi State University, 2005. http://library.msstate.edu/content/templates/?a=72.
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Noda, Yasushi, Hitoshi Saito, Hiromasa Sato, et al. "Conditioning Mechanism of Cu-Cr Electrode Based on Electrode Surface State under Impulse Voltage Application in Vacuum." IEEE, 2011. http://hdl.handle.net/2237/20726.
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Fielding, Andrew L. "Final state effects in neutron Compton scattering measurements." Thesis, University of Portsmouth, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310441.
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Church, Kevin. "Applications of Impulsive Differential Equations to the Control of Malaria Outbreaks and Introduction to Impulse Extension Equations: a General Framework to Study the Validity of Ordinary Differential Equation Models with Discontinuities in State." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31874.
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Impulsive differential equations are often used in mathematical modelling to simplify
complicated hybrid models. We propose an inverse framework inspired by impulsive
differential equations, called impulse extension equations, which can be used as a tool to determine when these impulsive models are accurate. The linear theory is the
primary focus, for which theorems analoguous to ordinary and impulsive differential
equations are derived. Results explicitly connecting the stability of impulsive differential equations to related impulse extension equations are proven in what we call time scale consistency theorems. Opportunities for future research in this direction are discussed.
Following the work of Smith? and Hove-Musekwa on malaria vector control by
impulsive insecticide spraying, we propose a novel autonomous vector control scheme based on human disease incidence. Existence and stability of periodic orbits is established. We compare the implementation cost of the incidence-based control to a fixed-time spraying schedule. Hybrid control strategies are discussed.
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Stookey, Emily Sims. "SKIN PICKING IN A COLLEGE POPULATION: CHARACTERISTICS AND COMORBIDITY." MSSTATE, 2008. http://sun.library.msstate.edu/ETD-db/theses/available/etd-06142008-104807/.
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The present study examined the prevalence and characteristics of skin picking in a college population in the southeast. Undergraduates completed a battery of self-report inventories that included the Skin Picking Inventory Abbreviated, Beck Depression Inventory, Beck Anxiety Inventory, Eating Disorders Inventory 2, Padua Inventory, Short Michigan Alcoholism Screening Test, Dissociative Experiences Scale, and a short demographics form. Only 1% of the sample population met the full criteria for pathological skin picking and 6.7% met the subclinical definition. As a result of their skin picking, all participants in the subclinical group reported significant distress or impairment in some area of functioning. Interestingly, the current subclinical sample included more males (60%) than females (40%). Higher levels of anxiety, depression, dissociative experiences, and alcohol abuse were associated with skin picking. The responses to the Skin Picking Inventory Abbreviated were analyzed and characteristics of skin picking are reported.
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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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Hakala, Tim. "Settling-Time Improvements in Positioning Machines Subject to Nonlinear Friction Using Adaptive Impulse Control." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/1061.
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A new method of adaptive impulse control is developed to precisely and quickly control the position of machine components subject to friction. Friction dominates the forces affecting fine positioning dynamics. Friction can depend on payload, velocity, step size, path, initial position, temperature, and other variables. Control problems such as steady-state error and limit cycles often arise when applying conventional control techniques to the position control problem. Studies in the last few decades have shown that impulsive control can produce repeatable displacements as small as ten nanometers without limit cycles or steady-state error in machines subject to dry sliding friction. These displacements are achieved through the application of short duration, high intensity pulses. The relationship between pulse duration and displacement is seldom a simple function. The most dependable practical methods for control are self-tuning; they learn from online experience by adapting an internal control parameter until precise position control is achieved. To date, the best known adaptive pulse control methods adapt a single control parameter. While effective, the single parameter methods suffer from sub-optimal settling times and poor parameter convergence. To improve performance while maintaining the capacity for ultimate precision, a new control method referred to as Adaptive Impulse Control (AIC) has been developed. To better fit the nonlinear relationship between pulses and displacements, AIC adaptively tunes a set of parameters. Each parameter affects a different range of displacements. Online updates depend on the residual control error following each pulse, an estimate of pulse sensitivity, and a learning gain. After an update is calculated, it is distributed among the parameters that were used to calculate the most recent pulse. As the stored relationship converges to the actual relationship of the machine, pulses become more accurate and fewer pulses are needed to reach each desired destination. When fewer pulses are needed, settling time improves and efficiency increases. AIC is experimentally compared to conventional PID control and other adaptive pulse control methods on a rotary system with a position measurement resolution of 16000 encoder counts per revolution of the load wheel. The friction in the test system is nonlinear and irregular with a position dependent break-away torque that varies by a factor of more than 1.8 to 1. AIC is shown to improve settling times by as much as a factor of two when compared to other adaptive pulse control methods while maintaining precise control tolerances.
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Jones, Kevin Wampler. "The Arab Quest for Modernity: Universal Impulses vs. State Development." Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etd/2113.
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The Arab Middle East began indigenous nation building relatively late in the twentieth century. Issues of legitimacy, identity, and conflicts with the West have plagued Arab nations. Arab states have espoused universal ideologies as solutions to the problems of Arab nation building.
The two ideologies of Pan-Arabism and Islamic modernism provided universal solutions to the Arab states. Both Pan-Arabism and Islamic modernism gained validity in political polemics aimed against colonialism, imperialism, Zionism, and the West. Both ideologies promised simple solutions to complex questions of building modern Arab society. Irrespective of ideology, Arab states have always acted in self-interest to perceived external threats. The West has perpetuated universal solutions to Arab nation building through continued intervention in the Middle East. The Arabs perpetuated universal solutions to Arab- nation building as panacea to the problems of becoming modern nations.
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Root, Jonathan B. "A people’s religion: the populist impulse in early Kansas Pentecostalism, 1901-1904." Thesis, Kansas State University, 2009. http://hdl.handle.net/2097/1371.
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Master of Arts<br>Department of History<br>Robert D. Linder<br>This thesis examines early Pentecostalism in light of the Populist Movement. There are two main arguments in this study. First, I maintain that early Kansas Pentecostalism, as seen in the teachings of Charles Fox Parham, was heavily influenced by Populist ideas and language. Parham displayed Populist tendencies in his attacks on the Protestant Establishment, which he believed had neglected to care for the spiritual and physical needs of “the people.” This failure on the part of the churches led Parham to believe that a major reform of the church was needed. Parham went beyond simply criticizing the establishment. He also developed a popular theology that empowered individuals, many of whom were poor and working-class, and created a strong sense of collective aspiration. The second argument of this study is that Populism fostered a sociopolitical environment in which Pentecostalism could thrive. Parham’s confrontations with the Protestant Establishment and his concern with the needs of “the people” was attractive to many individuals who tended to support movements that sought to disrupt the status quo. One event that can shed light on early Kansas Pentecostalism’s relationship with Populism was a revival in Galena, Kansas, a lead and zinc mining town in the southeast corner of the state, that took place from October 1903 to January 1904. By examining some of the connections between the Populist movement and early Kansas Pentecostalism, this study provides some insight into the development of one of the most popular expressions of Christianity in the world.
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Phang, Hiu-wang. "The relationship between state-trait anger, impulsivity and processingof negative-emotion information." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B2976015X.
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Shrestha, Prakash. "Study of the dielectric degradation of XLPE and EPR power cables by switching impulses." Master's thesis, Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-08212008-151448.
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Nascimento, Felipe da Trindade do. "Algoritmos Genéticos para Síntese de Filtros Aplicados em Controle por Modo Deslizante." Universidade do Estado do Rio de Janeiro, 2010. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=7527.
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Nesta Dissertação propõe-se a aplicação de algoritmos genéticos para a síntese de filtros
para modular sinais de controladores a estrutura variável e modo deslizante. A modulação
do sinal de controle reduz a amplitude do sinal de saída e, consequentemente, pode
reduzir o consumo de energia para realizar o controle e o chattering. Esses filtros também
são aplicados em sistemas que possuem incertezas paramétricas nos quais nem todas as
variáveis de estado são medidas. Nesses sistemas, as incertezas nos parâmetros podem
impedir que seus estados sejam estimados com precisão por observadores. A síntese
desses filtros necessita da obtenção da envoltória, que é o valor máximo da norma de cada
resposta impulsiva admissível no sistema. Após este passo, é sintetizado um filtro que
seja um majorante para a envoltória. Neste estudo, três métodos de busca da envoltória
por algoritmos genéticos foram criados. Um dos métodos é o preferido, pois apresentou
os melhores resultados e o menor tempo computacional.<br>This thesis proposes the application of genetic algorithms for the synthesis of filters which
modulate signals of variable structure sliding mode controllers. The modulation of the
control signal reduces the amplitude of the output signal and thus can reduce power
consumption and chattering. These filters are also applied to systems with parametric
uncertainties and unmeasured state variables. In these systems, the uncertainties can
impair the accurate estimation of the state by means of observers. For the synthesis of
these filters, it is necessary to obtain the envelope which is the maximum norm of each
impulse response admissible for the system. After this step, a filter is synthesized to be
an upper bound for the envelope. In this study, three methods of search of the envelope
by genetic algorithms were developed. One of these methods has been giving the best
results and needs the least computational time.
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Chaudhary, Irfan Ullah 1970. "Density of states of impure palladium deutride/hydride." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40153.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.<br>Includes bibliographical references (leaves 64-65).<br>by Irfan Ullah Chaudhary.<br>M.S.
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Hoene, Katherine Anne. "Tracing the Romantic impulse in 19th-century landscape painting in the United States, Australia, and Canada." Thesis, The University of Arizona, 2000. http://hdl.handle.net/10150/278748.
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The purpose of this thesis is to identify essential characteristics of the first generation of Romantic landscape painters and painting movements in a given English-speaking country which followed the generation of Turner, Constable and Martin in England, and then trace how the second generation of Romantic-realist painters represents a different paradigm. For a paradigmatic construct of the first generation, the focus is on the lives and major works of the American arch-Romantic landscape painter Thomas Cole (1801--1848) and the Australian Romantic landscape painter Conrad Martens (1801--1878). The second generation model features the American Frederic Edwin Church (1826--1900), the Australian William Charles Piguenit (1836--1914), and the British Canadian Lucius Richard O'Brien (1832--1899). Cole and Martens, closer to their predecessors in England, created dynamic paradigm shifts in their new countries. Following them, the second generation of Romantic-realists produced a synthesis of romanticism, scientific naturalism, and nationalistic symbolism.
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Basei, Matteo. "Topics in stochastic control and differential game theory, with application to mathematical finance." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424239.
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We consider three problems in stochastic control and differential game theory, arising from practical situations in mathematical finance and energy markets.
First, we address the problem of optimally exercising swing contracts in energy markets. Our main result consists in characterizing the value function as the unique viscosity solution of a Hamilton-Jacobi-Bellman equation. The case of contracts with penalties is straightforward. Conversely, the case of contracts with strict constraints gives rise to stochastic control problems where a non-standard integral constraint is present: we get the anticipated characterization by considering a suitable sequence of unconstrained problems. The approximation result is proved for a general class of problems with an integral constraint on the controls.
Then, we consider a retailer who has to decide when and how to intervene and adjust the price of the energy he sells, in order to maximize his earnings. The intervention costs can be either fixed or depending on the market share. In the first case, we get a standard impulsive control problem and we characterize the value function and the optimal price policy. In the second case, classical theory cannot be applied, due to the singularities of the penalty function; we then outline an approximation argument and we finally consider stronger conditions on the controls to characterize the optimal policy.
Finally, we focus on a general class of non-zero-sum stochastic differential games with impulse controls. After defining a rigorous framework for such problems, we prove a verification theorem: if a couple of functions is regular enough and satisfies a suitable system of quasi-variational inequalities, it coincides with the value functions of the problem and a characterization of the Nash equilibria is possible. We conclude by a detailed example: we investigate the existence of equilibria in the case where two countries, with different goals, can affect the exchange rate between the corresponding currencies.<br>In questa tesi vengono considerati tre problemi relativi alla teoria del controllo stocastico e dei giochi differenziali; tali problemi sono legati a situazioni concrete nell'ambito della finanza matematica e, più precisamente, dei mercati dell'energia.
Innanzitutto, affrontiamo il problema dell'esercizio ottimale di opzioni swing nel mercato dell'energia. Il risultato principale consiste nel caratterizzare la funzione valore come unica soluzione di viscosità di un'opportuna equazione di Hamilton-Jacobi-Bellman. Il caso relativo ai contratti con penalità può essere trattato in modo standard. Al contrario, il caso relativo ai contratti con vincoli stretti porta a problemi di controllo stocastico in cui è presente un vincolo non standard sui controlli: la suddetta caratterizzazione è allora ottenuta considerando un'opportuna successione di problemi non vincolati. Tale approssimazione viene dimostrata per una classe generale di problemi con vincolo integrale sui controlli.
Successivamente, consideriamo un fornitore di energia che deve decidere quando e come intervenire per cambiare il prezzo che chiede ai suoi clienti, al fine di massimizzare il suo guadagno. I costi di intervento possono essere fissi o dipendere dalla quota di mercato del fornitore. Nel primo caso, otteniamo un problema standard di controllo stocastico impulsivo, in cui caratterizziamo la funzione valore e la politica ottimale di gestione del prezzo. Nel secondo caso, la teoria classica non può essere applicata a causa delle singolarità nella funzione che definisce le penalità. Delineiamo quindi una procedura di approssimazione e consideriamo infine condizioni più forti sui controlli, così da caratterizzare, anche in questo caso, il controllo ottimale.
Infine, studiamo una classe generale di giochi differenziali a somma non nulla e con controlli di tipo impulsivo. Dopo aver definito rigorosamente tali problemi, forniamo la dimostrazione di un teorema di verifica: se una coppia di funzioni è sufficientemente regolare e soddisfa un opportuno sistema di disequazioni quasi-variazionali, essa coincide con le funzioni valore del problema ed è possibile caratterizzare gli equilibri di Nash. Concludiamo con un esempio dettagliato: indaghiamo l'esistenza di equilibri nel caso in cui due nazioni, con obiettivi differenti, possono condizionare il tasso di cambio tra le rispettive valute.
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Hamdy, Ronald C., Amber Kinser, Tracey Kendall-Wilson, Audrey Depelteau, and Kathleen Whalen. "Impulsive, Disinhibited Behavior—Dining in a Restaurant." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/2732.
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Dining in a restaurant with a loved one who has dementia can be an ordeal, especially if the expectations of the caregiver do not match those of the patient and the restaurant environment is not suitable for patients with dementia. The size of the dining area, lighting, background music or noise, décor of the room, number of customers, variety of the items on the menu, number of plates and cutlery on the table, in addition to flowers, candles, and other decorations on the table are all potent distractors. There are so many stimuli; the patient can be overwhelmed with information overload and not able to focus on the main purpose of the event: have dinner and especially enjoy the other person’s company. In this case scenario, we present a 62-year-old man diagnosed with behavioral variant frontotemporal dementia (bvFTD). His daughter “invited” him to have dinner with her at a very fancy restaurant to celebrate her promotion at work. Unfortunately, whereas the evening started very well, it had a catastrophic ending. We discuss what went wrong in the patient/daughter interaction and how the catastrophic ending could have been avoided or averted.
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Morgan, Brittni V. "The Relationship of Urgency to Impulsive Decision-Making During Heightened Affective States in Problem Drinkers." Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1529938004166288.
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Hamilton, Luzaan. "The influence of culture on students' impulsive buying behaviour in the Vaal Triangle area / Luzaan Hamilton." Thesis, North-West University, 2011. http://hdl.handle.net/10394/8516.
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Impulse buying or unplanned purchases by consumers constitute a major proportion of purchases in certain product categories. Studies in the United States widely reported that impulse consumer buying behaviour accounts for up to 80% of all purchases in certain product categories, and it has been suggested that purchases of new products result more from impulse purchasing than from prior planning. South Africa is a nation of shoppers with increasing numbers defined as impulse buyers who respond to glossy adverts such as „never to be beaten bargains‟ and „buy one get one free‟. Culture has a profound effect on why people buy. Culture affects the specific products people buy as well as the structures of consumption, individual decision-making and communication in a society. Since South Africa has quite a diverse group of different cultures, it has been of great importance to determine whether cultural differences had an influence on impulsive buying behaviour. The primary research objective was to assess the influence of different cultures on consumer impulsive buying behaviour of students. The findings of this research study did not clearly indicate if culture had an effect on students‟ impulsive buying behaviour.<br>Thesis (M.Com. (Business Management))--North-West University, Vaal Triangle Campus, 2011
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Siuda, Radim. "Kondenzační parní turbina." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231428.
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This master’s thesis deals with design of a high speed steam turbine with detachable condensation module and integrated gearbox. As a source of energy is used heat waste, which is a result of the diesel engines function. Important options concerning conception of the turbo set are discussed in the master’s thesis. Subsequently, thermodynamic calculations for each module are done. Part of the thesis is also simplified calculation of the integral gearbox. Construction drawings of all modules and of the complete turbo set with electrical generator were created based on thermodynamic calculation.
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Krčál, Adam. "High-dimensional VAR analysis of regional house prices in United States." Master's thesis, Vysoká škola ekonomická v Praze, 2015. http://www.nusl.cz/ntk/nusl-202128.
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In this thesis the heterogeneity of regional real estate prices in United States is investigated. A high dimensional VAR model with additional exogenous predictors, originally introduced by \cite{fan11}, is adopted. In this framework, the common factor in regional house prices dynamics is explained by exogenous predictors and the spatial dependencies are captured by lagged house prices in other regions. For the purpose of estimation and variable selection under high-dimensional setting the concept of Penalized Least Squares (PLS) with different penalty functions (e.g. LASSO penalty) is studied in detail and implemented. Moreover, clustering methods are employed to identify subsets of statistical regions with similar house prices dynamics. It is demonstrated that these clusters are well geographically defined and contribute to a better interpretation of the VAR model. Next, we make use of the LASSO variable selection property in order to construct the impulse response functions and to simulate the prices behavior when a shock occurs. And last but not least, one-period-ahead forecasts from VAR model are compared to those from the Diffusion Index Factor Model by \cite{stock02}, a commonly used model for forecasts.
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Slavinskis, Nerijus. "Short pulse q-switched longitudinally diode pumped solid state minilasers: generation, characterization and application." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110630_134119-87467.
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The dissertation is dedicated to the detailed numerical modelling of generation dynamics of actively and/or passively Q-switched diode laser longitudinally pumped solid-state lasers, characterization of spatial and temporal laser properties and for the demonstration of application possibility of created minilasers. A detailed theoretical model for the description of generation dynamics using travelling wave approach is presented. In this model more parameters of active laser medium, pump sources and resonator architecture are taken into account. In this thesis the results which show the principal difference between results obtained using the laser travelling wave model and point laser model are presented. Using point laser model the problems of generated pulse timing jitter in passively Q-switched lasers are described and its lowering possibilities using different pumping methods are suggested. In this thesis new, based by the second order moment, laser beam characterisation by knife-edge method is presented. Also laser pulse compression possibilities in tetrachloride CCL4 medium are described. It is showed that using seed signal it is possible to obtain shorter (< 60 ps) and more stable optical pulses. In this thesis application possibilities of created minilasers are presented: the experimental results of the Z-scan measurements obtained using pulses with different pulse shapes for fused silica are presented; also experiments, in which, created minilasers for paper cleaning... [to full text]<br>Disertacija skirta diodais kaupinamų kietojo kūno lazerių su aktyviąja ir pasyviąja kokybės moduliacija generacijos dinamikos detalesnei skaitmeninei analizei, lazerio impulsų laikinių ir erdvinių parametrų charakterizavimui ir sukurtų minilazerių panaudojimo galimybių demonstracijai. Generacijos dinamikos detalesniai skaitmeniniai analizei, darbe pristatomas sukurtas bėgančiųjų bangų modelis, kuriame atsižvelgiama ne tik į daugelį procesų vykstančių lazerio aktyviajame elemente, bet ir į rezonatoriaus konfigūraciją bei kaupinimo šaltino parametrus. Pateikiami skaitinio modeliavimo rezultatai demonstruojantys šio modelio privalumus lyginant su dažniausiai naudojamu taškiniu lazerio modeliu. Naudojant taškinį lazerio modelį yra nagrinėjama generuojamų impulsų laikinio tirtėjimo problema pasyvios kokybės moduliacijos lazeriuose ir pasiūlyti mažinimo būdai naudojant skirtingus kaupinimo būdus. Darbe taip pat pateiktas naujas, antraisiais momentais pagrįstas, pluošto charakterizavimo judančiu peiliu metodas. Nagrinėjamos lazerių impulsų spūdos galimybės tetrachlorido CCL4 skystyje ir pademonstruota, kad naudojant užkrato signalą galima gauti trumpesnius (< 60 ps) ir stabilesnius optinius impulsus. Darbe pademonstruotos sukurtų minilazerių pritaikymo galimybės: aprašomas netiesinio lūžio rodiklio kvarciniame stikle matavimas Z-skenavimo metodu ir gautų duomenų apdorojimo procedūra įskaitant naudojamų impulsų erdvinę ir laikinę formą; aprašomi eksperimentai, kuriuose sukurti... [toliau žr. visą tekstą]
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Brown-Beasley, Michael Warren. "Modern American psychiatric diagnosis and the DSM : critiques of impure reason." Thesis, University of Wales Trinity Saint David, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.683342.
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Sahd, Fábio Bacila. "As violações impunes de direitos humanos e humanitários dos palestinos vivendo sob a ocupação israelense: possíveis interpretações." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/8/8161/tde-21022018-102435/.
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A presente tese tem por objeto o conflito na Palestina/Israel, mais especificamente as políticas da ocupação israelense na Faixa de Gaza e Cisjordânia e a vulnerabilidade palestina, desde 1967 até os dias de hoje. A situação é analisada a partir da contextualização do conflito no mundo contemporâneo e na região e da contraposição entre bibliografia específica e geral com relatórios de direitos humanos e humanitários. Averígua-se em que medida essa documentação referenda ou fragiliza diferentes interpretações do conflito e da ocupação, bem como quais outras leituras são sugeridas por sua análise. É a permanência do impasse que mantém o tema sempre atual, justificando seu estudo. Constata-se a manutenção de um padrão peculiar de violações sistemáticas dos direitos humanos e humanitários dos palestinos pelo Estado e parte da população israelense, que os mantêm expostos à violência soberana, sendo adequados também para a compreensão dessa situação o conceito de terrorismo estatal e as categorias agambeanas de homo sacer e campo.<br>This thesis deals with the conflict in Palestine/Israel, more specifically the policies of the Israeli occupation in the Gaza Strip and West Bank and the Palestinian vulnerability, from 1967 to the present day. To analyze the conflict and the occupation they are contextualized in the contemporary world and in the region and the specific and general bibliography are compared to human and humanitarian rights reports. One checks to what extent this documentation endorses or undermines different interpretations of the conflict and Israeli occupation, as well as what other readings are suggested by their analysis. It is the permanence of the impasse that keeps the theme always current, justifying its study. Is verified the maintenance of a peculiar pattern of systematic violations of the human and humanitarian rights of the Palestinians by the State and part of the Israeli population, which keeps them exposed to sovereign violence, and the pertinence of the concept of state terrorism and of the agambean categories of homo sacer and camp to understand this situation.
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Lee, Youngjae. "Effects of Fall Technique Training on Impact Forces when Falling from Standing." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/89931.
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As falls and fall-related injuries are a major cause of injuries, the purpose of this study was to investigate whether, and to what extent, the stage combat fall technique training could reduce the impact forces of falls from standing.
Twenty-six healthy young adults (14 males and 12 females) participated in our study, and were randomly assigned to either a training group or non-training (control) group. Both groups completed a pre-intervention and a post-intervention fall testing session, separated by two weeks, in which they performed naturalistic falls. The training group performed identical pre-intervention fall testing as the control group, and was then required to receive four 1-hour training sessions in the course of two weeks, led by a certified stage combat fall technique training instructor. The training group then completed a post-intervention fall testing session where they performed naturalistic falls and also falls using the fall technique they learned. Falls were induced in both forward and backward directions using a tether-release protocol. Differences between control and training groups at pre-training, and group differences in the change in dependent measures with training, were examined using Mann-Whitney U tests.
The results showed that, following stage-combat fall training, the training group exhibited 32% and 35% reduction in median impact forces for forward and backward falls respectively, while the control group exhibited 5% and 2% reductions (p = 0.002 and <0.001). In addition, the training group showed shorter backward fall duration as well as longer impact time, larger impulse, and longer or larger center-of-pressure based measures for both directions of falling than the control group. However, training was not associated with reduced impact force during the naturalistic falls of the training group.
To our knowledge, this was the first study to investigate the stage combat fall technique training and demonstrate its effectiveness as an intervention to reduce impact forces of falls, thereby exploring the potential to reduce the number of fall-related injuries. While these falls were induced from standing, whether these results would transfer to an unanticipated fall while walking due to a slip/trip remain to be explored.<br>Master of Science<br>As falls and fall-related injuries are a major cause of injuries, the purpose of this study was to investigate whether, and to what extent, the stage combat fall technique training could reduce the impact forces of falls from standing. Twenty-six healthy young adults (14 males and 12 females) participated in our study, and were randomly assigned to either a training group or non-training (control) group. Both groups completed a pre-intervention and a post-intervention fall testing session, separated by two weeks, in which they performed naturalistic falls. The training group was required to receive four 1-hour training sessions in the two-week intervention period, led by a certified stage combat fall technique training instructor. The training group then completed a post-intervention fall testing session where they performed naturalistic falls and also falls using the fall technique they learned. The results showed that, following stage-combat fall training, the training group exhibited nearly a 1/3rd reduction in impact forces for both forward and backward falls, while the control group only exhibited 5% and 2% reductions respectively. Our analysis also showed that the training group achieved this reduction in impact force by increasing the impact time and spreading out their bodies more, to distribute the impact over a larger area. To our knowledge, this was the first study to investigate the stage combat fall technique training and demonstrate its effectiveness as an intervention to reduce impact forces of falls, thereby exploring the potential to reduce the number of fall-related injuries.
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Uherek, Jan. "Kondenzační parní turbína pro pohon napájecího čerpadla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241704.
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This diploma thesis focuses on designing impulse stage steam turbine to be used as the feed pump drive. I consecutively carried out thermodynamic calculation, seals and bearings layouts, with the aim to determine the steam mass flow through the turbine. Furthermore, I conducted turbine blade toughness check-ups, determined the rotor critical rotational speed, check-up rotor critical place (bearing pin) for torsion, and created a clutch screws design. The final part of this thesis pursues the other operating states of the turbine. This thesis is amended by a mechanical drawing of the turbine transection.
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Kracík, Petr. "Kondenzační parní turbina." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229828.
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Diploma thesis named Condensing steam turbine deals with heat scheme balancing computation of condensing steam turbine K55 and her design. This turbine with 5 unregulated take-offs and overpressure blading type, is computed with (c_a/u) method in the middle of blading diameter. Regulation degree is chosen with impulse blading and feet cross section is checked on durability. At the end of the thesis turbine consumption characteristic is derived from the zero output up to the nominal output. Integrated part of this thesis is conceptional design of longitudal turbine section.
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Urbánek, Martin. "Kondenzační parní turbina s přihříváním." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231387.
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The thesis is focused on designing of condensing steam turbine with reheating for combustion of biomass. The turbine is developed to be tandem compound-regenerative with five uncontrolled extraction points. Optimization of reheating pressure is made in the turbine's cycle. The turbine outlet is constructed to lead down to the water cooled condenser. Thesis includes the calculation of heat cycle with the draft of flow channel of high pressure and middle-low pressure turbine. Detailed calculation of middle-low pressure turbine, including stress-strength analysis, is performed. The thesis provides an evaluation of flow scheme of 100 % and 75 % of generator’s power output and the drawing of middle-low pressure turbine in longitudinal section.
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Grishin, Mikhail. "Nuolatinai kaupinamų regeneracinių lazerinių stiprintuvų dinamika." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110628_134544-62447.
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Šioje disertacijoje tiriami nuolatinai kaupinami regeneraciniai stiprintuvai su ilgos relaksacijos trukmės lazerine terpe. Tikslas buvo išanalizuoti bendrus tokių sistemų sudėtingos dinamikos dėsningumus pasireiškiančios aukštų dažnių diapazone ir surasti būdą pasiekti maksimalias išėjimo impulsų energijas išlaikant jų stabilumą. Analitiškai aprašomos pagrindinės optimizuotų ir stabiliame režime veikiančių stiprintuvų charakteristikos, tokios kaip optimalūs pradinis ir galutinis stiprinimo koeficientai, maksimali išėjimo impulso energija, rezonatoriuje išsklaidytoji galia, daugelio praėjimų B-integralas ir rezonatoriaus apėjimų skaičius, su kuriuo gaunama maksimali išėjimo impulso energija. Nustatytos egzistuojančių dinaminių režimų (stabilaus, kvaziperiodinio ir chaotinio) sritys valdančiųjų parametrų erdvėje. Išsiaiškinta, kad nestabilaus veikimo sritis mažėja, kai užkrato impulso energija didėja. Sukurtas ir išplėtotas stabilumo diagramų metodas, kuris ne tik suformuoja sisteminį požiūrį į regeneracinio stiprinimo dinamikos optimizavimą, bet ir leidžia nustatyti užkrato energijos dydį, pakankamą stabiliam veikimui palaikyti. Nustatytos darbinės charakteristikos kritiniame impulsų pasikartojimo dažnių diapazone, kur neegzistuoja analitiniai sprendiniai ir nestabilumai yra labiausiai tikėtini. Teoriniai rezultatai patvirtinti eksperimentiškai diodais kaupinamoje pikosekundinėje Nd:YVO4 lazerinėje sistemoje. Pademonstruota, kad užkrato impulso energijos padidinimas susiaurina... [toliau žr. visą tekstą]<br>This thesis presents a detailed study of continuously pumped regenerative amplifiers based on long-relaxation-time laser media. The goal of the research was to develop a general pattern of complex dynamics peculiar to such systems at high repetition rates and to find a way to improve performance characteristics affected by instabilities. Basic parameters of the optimally coupled regenerative amplifier operating in stable regime were derived in analytical form. They include optimum initial and final gains, the maximum output pulse energy, the power dissipation, the multi-pass B-integral and the roundtrip number providing the maximum output energy. A comprehensive pattern of existing dynamic regimes (stable, quasi-periodic and chaotic) was represented in space of controlling parameters. It has been found that the space of unstable operation decreases as the seed pulse energy increases. A method of stability diagrams, which forms a systematic approach to the optimization of regenerative amplification dynamics and in particular allows one to determine the seed pulse level sufficient to maintain the operation stable, has been developed. Performance characteristics were determined in the critical range of repetition rates, where instabilities are pronounced at the most and analytical solutions are unavailable. The experiments, carried out using the diode pumped picosecond Nd:YVO4 laser system, exhibited a good agreement with theoretical inferences. It has been demonstrated that... [to full text]
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Grishin, Mikhail. "Dynamics of continuously pumped regenerative laser amplifiers." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110628_134556-72562.
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This thesis presents a detailed study of continuously pumped regenerative amplifiers based on long-relaxation-time laser media. The goal of the research was to develop a general pattern of complex dynamics peculiar to such systems at high repetition rates and to find a way to improve performance characteristics affected by instabilities. Basic parameters of the optimally coupled regenerative amplifier operating in stable regime were derived in analytical form. They include optimum initial and final gains, the maximum output pulse energy, the power dissipation, the multi-pass B-integral and the roundtrip number providing the maximum output energy. A comprehensive pattern of existing dynamic regimes (stable, quasi-periodic and chaotic) was represented in space of controlling parameters. It has been found that the space of unstable operation decreases as the seed pulse energy increases. A method of stability diagrams, which forms a systematic approach to the optimization of regenerative amplification dynamics and in particular allows one to determine the seed pulse level sufficient to maintain the operation stable, has been developed. Performance characteristics were determined in the critical range of repetition rates, where instabilities are pronounced at the most and analytical solutions are unavailable. The experiments, carried out using the diode pumped picosecond Nd:YVO4 laser system, exhibited a good agreement with theoretical inferences. It has been demonstrated that... [to full text]<br>Šioje disertacijoje tiriami nuolatinai kaupinami regeneraciniai stiprintuvai su ilgos relaksacijos trukmės lazerine terpe. Tikslas buvo išanalizuoti bendrus tokių sistemų sudėtingos dinamikos dėsningumus pasireiškiančios aukštų dažnių diapazone ir surasti būdą pasiekti maksimalias išėjimo impulsų energijas išlaikant jų stabilumą. Analitiškai aprašomos pagrindinės optimizuotų ir stabiliame režime veikiančių stiprintuvų charakteristikos, tokios kaip optimalūs pradinis ir galutinis stiprinimo koeficientai, maksimali išėjimo impulso energija, rezonatoriuje išsklaidytoji galia, daugelio praėjimų B-integralas ir rezonatoriaus apėjimų skaičius, su kuriuo gaunama maksimali išėjimo impulso energija. Nustatytos egzistuojančių dinaminių režimų (stabilaus, kvaziperiodinio ir chaotinio) sritys valdančiųjų parametrų erdvėje. Išsiaiškinta, kad nestabilaus veikimo sritis mažėja, kai užkrato impulso energija didėja. Sukurtas ir išplėtotas stabilumo diagramų metodas, kuris ne tik suformuoja sisteminį požiūrį į regeneracinio stiprinimo dinamikos optimizavimą, bet ir leidžia nustatyti užkrato energijos dydį, pakankamą stabiliam veikimui palaikyti. Nustatytos darbinės charakteristikos kritiniame impulsų pasikartojimo dažnių diapazone, kur neegzistuoja analitiniai sprendiniai ir nestabilumai yra labiausiai tikėtini. Teoriniai rezultatai patvirtinti eksperimentiškai diodais kaupinamoje pikosekundinėje Nd:YVO4 lazerinėje sistemoje. Pademonstruota, kad užkrato impulso energijos padidinimas susiaurina... [toliau žr. visą tekstą]
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Dufour, Adrien. "Ingénierie d'états quantiques multimodes avec des impulsions femtosecondes." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS237.
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Cette thèse a pour ambition de préparer des états de la lumière dotés de caractéristiques nouvelles et désirables en utilisant les propriétés des peignes de fréquences appliquées à l'optique quantique multimode. Un des avantages de l'optique femtoseconde vient du caractère hautement multimode des peignes de fréquence, qui permet notamment de créer du vide comprimé multimode. La répartition des ressources quantiques entre ces différents modes étant d'importance, nous avons étudié une manière de la contrôler grâce à une mise en forme spectrale du faisceau de pompe de l'oscillateur paramétrique optique. Nous montrons qu'une détection homodyne multipixel est un outil d'analyse indispensable. Pour une répartition modale donnée, il est possible de modifier l'état quantique qui la peuple. Une modification désirable est la dégaussification de la fonction de Wigner, que nous implémentons au moyen d'une soustraction de photon. Outre la possibilité de dégaussifier l'état dans un mode, notre dispositif permet également de soustraire un photon dans une superposition cohérente de supermodes, ce qui est nouveau. De plus, nous pouvons choisir librement le mode dans lequel la soustraction a lieu. Cette versatilité permet de créer de nouveaux types d'états, par exemple lorsque l'on soustrait dans les nœuds d'un canevas quantique (aussi appelé état cluster). En particulier, nous pouvons créer des états présentant de l'intrication inhérente entre les modes, c'est-à-dire une intrication qui ne peut pas être défaite par changement de base<br>This thesis' purpose is to prepare multimode quantum states with new properties, taking advantage of the frequency combs' capabilities applied to quantum optics. One of those capabilities is their highly multimode nature, which makes us able to generate multimode states, such as the multimode squeezed vacuum generated in our lab with an frequency-comb-pumped OPO. In order to control the way the squeezed vacua spread over the modes of the comb, we performed the spectral pulse shaping of the pump beam. We show that multimode homodyne detection is an essential analysis tool and pave the way for its implementation. With a set of given modes, it is also possible to alter the quantum state itself. Specifically, the Wigner function can be made non-gaussian by a photon subtraction. We applied the multimode photon subtraction and we generated for the first time a multimode photon-subtracted squeezed vacuum with more than 2 modes. We report negativity of the Wigner function. Our photon subtraction scheme is mode selective, which allowed us to subtract in a coherent superposition of modes. We applied it on cluster states (highly entangled multimode states), creating states than exhibit inherent entanglement : entanglement that can not be unknotted by a linear transformation such as a change of basis
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Consorti, Valerio Verfasser], and Gregor [Akademischer Betreuer] [Herten. "Search for squarks and gluinos in final states with jets and missing transverse momentum with the ATLAS detector at LHC = Suche nach squarks und gluinos in Endzuständen mit jets und fehlenden transversalen Impuls mit dem ATLAS-Detektor am LHC." Freiburg : Universität, 2015. http://d-nb.info/1119716853/34.
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Obrlík, Jan. "Turbínový pohon dobíjecí jednotky elektrobusu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319482.
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Diploma thesis deals with use of combustion chamber to drive the electric bus charging unit. Based on the research and analysis of operation economy, a turboexpander with an air pressure tank is selected to drive the charging unit. A thermodynamic design is created for this variant. Based on this design a unit layout is proposed. Layout drawings are created for the proposed layout.
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União, Gabriel Gonçalves. "Teoria de semigrupos e aplicações a equações impulsivas com retardamento dependendo do estado." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/55/55135/tde-26022007-163308/.
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Neste trabalho estudaremos a existência de soluções fracas para uma classe de equações diferenciais funcionais impulsivas com retardamento dependendo do estado modeladas na forma \'x POT. PRIME\'(t) = Ax(t) + f(t;\' x IND. p(t, xt)), t \'PERTENCE A\'I = [0,a], \'x IND. 0\' =\\varphi \'PERTENCE A\' B, \'DELTA\' \'x(t IND. i) = \'I IND.i\'i(\'x IND.i\'); i = 1, ...n, onde A é o gerador infinitesimal de um \'C IND. 0\'-semigrupo compacto de operadores lineares limitados (\'T\'(t))t \'. OU =\'0 definido em um espaço de Banach X; as fun»ções \'x IND. s\' : (- \'INFIINITO\', 0] \'SETA\' X, \'x IND. s\' ( teta\') = x(s + \'teta\'), estão em um espaço de fase B descrito axiomaticamente; f : I X B \'seta\' X, \'rô\' : I X B \'SETA\' ( - \'INFINITO\', a], \'I IND. i\' : B \'SETA\'X, i=1, ...n , são funções apropriadas; 0 < \'t IND.1\' <... < \'t IND. n\' < a são n¶umeros pré-fixados e o símbolo \'DELTA\'\'ksi\'(t) = \'Ksi\'(\'t POT. + ) - \'ksi\'( \'t POT. -).<br>In this work we stablish the existence of mild solutions for an impulsive abstract functional differential equation with state-dependent delay described in the form \'x POT. PRIME\'(t) = Ax(t) + f(t;\' x IND. p(t, xt)), t \'BELONGS\'I = [0,a], \'x IND. 0\' =\\varphi \'IS CONTAINED\' B, \'DELTA\' \'x(t IND. i) = \'I IND.i\'i(\'x IND.i\'); i = 1, ...n, where A is the infinitesimal generator of a compact \'C IND. 0\'-semigroup of bounded linear operators (\'T\'(t))t \'. OU =\'0 defined on a Banach space X; the functions \'x IND. s\': ( - INFINito, 0] \'SETA X, \'x IND. s\'(\'teta\') , belongs to some space B described axiomatically; f : I X B \'seta\' X, \'rô\' : I X B \'SETA\' ( - \'INFINITO\', a], \'I IND. i\' : B \'SETA\'X, i=1, ...n , são funções apropriadas; 0 < \'t IND.1\' <... < \'t IND. n\' < a são n¶umeros pré-fixados e o símbolo \'DELTA\'\'ksi\'(t) = \'Ksi\'(\'t POT. + ) - \'ksi\'( \'t POT. -).
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Baumgarten, Lars. "Gesteinsmechanische Versuche und petrophysikalische Untersuchungen – Laborergebnisse und numerische Simulationen." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2016. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-202612.
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Dreiaxiale Druckprüfungen können als Einstufenversuche, als Mehrstufenversuche oder als Versuche mit kontinuierlichen Bruchzuständen ausgeführt werden. Bei der Anwendung der Mehrstufentechnik ergeben sich insbesondere Fragestellungen hinsichtlich der richtigen Wahl des Umschaltpunktes und des optimalen Verlaufs des Spannungspfades zwischen den einzelnen Versuchsstufen. Fraglich beim Versuch mit kontinuierlichen Bruchzuständen bleibt, ob im Versuchsverlauf tatsächlich Spannungszustände erfasst werden, welche die Höchstfestigkeit des untersuchten Materials repräsentieren. Die Dissertation greift diese Fragestellungen auf, ermöglicht den Einstieg in die beschriebene Thematik und schafft die Voraussetzungen, die zur Lösung der aufgeführten Problemstellungen notwendig sind. Auf der Grundlage einer umfangreichen Datenbasis gesteinsmechanischer und petrophysikalischer Kennwerte wurde ein numerisches Modell entwickelt, welches das Spannungs-Verformungs-, Festigkeits- und Bruchverhalten eines Sandsteins im direkten Zug- und im einaxialen Druckversuch sowie in dreiaxialen Druckprüfungen zufriedenstellend wiedergibt. Das Festigkeitsverhalten des entwickelten Modells wurde in Mehrstufentests mit unterschiedlichen Spannungspfaden analysiert und mit den entsprechenden Laborbefunden verglichen.
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Bharadwaj, Arjun. "On quantifying covertness of ultra-wideband impulse radio." 2002. http://www.lib.ncsu.edu/theses/available/etd-08162002-063546/unrestricted/etd.pdf.
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Chen, Yu-Hsing, and 陳淯星. "A Solid-State Transfer Switch Based on Impulse-Commutated Thyristors." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/31666489103851893202.
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碩士<br>國立清華大學<br>電機工程學系<br>92<br>In the recent years, voltage sags have become a very important power quality issue. Voltage sags often interrupt the manufacturing process and result in significant losses. In the high-tech industry parks of Taiwan, Manufacturers can lose up to a million US dollars for each voltage sags. To improve the power quality and reliability, more and more utility companies provide dual power feeders to these high-tech manufacturers. The static transfer switch (STS) based on thyristors can utilize the dual power feeders to protect sensitive loads against voltage sags. Conventional STS may require more than a quarter cycle to complete the transfer process depending on the load condition. In this thesis, an improved STS with resonant commutator circuit is proposed. The proposed system can greatly shorten the transfer time and provide better protection against voltage sags. Computer simulations and laboratory test results are presented to validate the performance of the proposed STS system.
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Lovelace, William M. "Multi-user performance issues in wireless impulse radio networks." 2004. http://www.lib.ncsu.edu/theses/available/etd-10062004-084155/unrestricted/etd.pdf.
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Ward, Jon R. "Chip discrimination for UWB impulse radio networks in multipath channels." 2005. http://www.lib.ncsu.edu/theses/available/etd-07182005-105852/unrestricted/etd.pdf.
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Said, Jasmin. "Decis State - Dysfunktionen neuronaler Mechanismen der Impulskontrolle bei Suchterkrankung –eine funktionell-kernspintomographische Untersuchung von Patienten mit langjähriger Alkoholabhängigkeit." Doctoral thesis, 2020. http://hdl.handle.net/21.11130/00-1735-0000-0005-13AB-5.
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Boyette, Wesley Ryan. "Thrust and specific impulse optimization of eight-centimeter valveless pulsejets at low subsonic flight speeds." 2008. http://www.lib.ncsu.edu/theses/available/etd-07252008-140723/unrestricted/etd.pdf.
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Hsuan-Yu, Chen, and 陳宣妤. "Using consumer’s emotional state to examine the effect on impulse purchase: The case of department store industry." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/9myrrs.
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碩士<br>國立臺北大學<br>國際企業研究所<br>104<br>The aim of this study is to illustrate the causal relationship among product attributes, the consumer’s emotional state, and impulse purchase behavior. Product attributes, especially sales promotion, have a great influence on impulse purchase behavior. Thus, department store industry marketers could improve impulse purchase behavior and purchase intentions by encouraging sales promotion, including monetary promotion and non-monetary promotion. Specifically, the implementation of a sales promotion raises the customer’s level of the pleasure emotion. In turn, pleasure emotion strengthens the consumer’s impulse purchase behavior and purchase intention.
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Munoz, Yuri R. (Yuri Ramiro). "An investigation into the sales-advertising relationship : the state lottery case." 2009. http://hdl.handle.net/2152/9677.
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The present investigation aims at modeling the sales response to advertising and, in the process, sheds some light on the sales-advertising relationship subject, which has been at the center of a decades-long controversy due to its inherent complexities. We studied three Colorado Lottery games, Lotto, Powerball, and Scratch, over a four-year period of operation. To synthesize a model that appropriately described the sales-advertising behavior of each one of these games, we addressed three fundamental questions driving the modeling process itself: 1. Is there a relationship between sales and advertising? 2. If such relationship exists, is there an advertising "carryover effect" on sales? And, 3. What is the shape of the sales-advertising relationship? We put forward two general-response models (Current Effects and Koyck's) in combination with eight functional forms (one linear and seven nonlinear forms) to address the above questions and test the respective hypotheses. Employing the available time series data corresponding to game sales, game advertising expenditures, state population, state unemployment rate, and jackpot (for the relevant games), we performed the respective regression analyses. We, then, evaluated the posited relationships and selected the best predictive model for each game, when statistical evidence supported a significant sales-advertising association. Using this final model, we addressed the three research questions at the core of this study. The results of this investigation suggested the existence of a significant positive and nonlinear (concave-downwards) Scratch sales-advertising relationship. No sales-advertising association was found for the Lotto or Powerball games. The data analyzed did not seem to support either the advertising "carryover effect" on sales on any of the games studied. From the theoretical point of view, these findings extend prior empirical research that has generally assumed, for simplification purposes, a linear sales-advertising relationship with its corresponding consequences. From the practical perspective, this study highlights advertising’s contribution to sales, which can help debunk mistaken beliefs frequently stigmatizing advertising as a resource-spending function and quell the long-established skepticism about its financial accountability.<br>text
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Son, Jong Chil. "Essays on monetary policy and asset prices." 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2008-12-176.
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The recent financial and economic turmoil driven by housing market has led the economists to refocus on the issue about monetary policy and asset price, especially housing price. In this dissertation I investigate the various relationships between monetary policy and asset prices in U.S. economy through steady state Bayesian VAR (SS BVAR) and revised Taylor-typed interest rate rule (Forward-looking rule) based on Generalized Method of Moments (GMM) methodology.
In chapter II, steady state Bayesian VAR (SS BVAR) methodology is introduced and multi step-ahead forecasts are executed. Upon usual squared error loss methodology the forecasting performances of SS BVAR are evaluated in comparison with standard BVAR and conventional VAR. Equal predictive ability tests following Giacomini and White (2006) verify that the SS BVAR is superior in forecasting power especially in long-horizons.
In chapter III, identification issue involving housing sector is explored through two different ways: economic theory-based approach and algorithms of inductive causations. Despite the different approaches the housing sector’s specifications are somewhat similar. Impulse response analyses demonstrate that monetary shock to housing price is relatively smaller, less significant, and less lasting when compared to Choleski identification. Also historical decomposition and conditional forecast analyses indicate that the housing price shock itself is crucial in accounting the sharp increase and sudden drop of housing price since 2003. Upon the estimated evidences I conjecture that there are much uncertainty between monetary policy and housing price, recalling the consideration of institutional factors when trying to accounting housing sectors.
In chapter IV, following Dupor and Conley (2004), I explore how Fed responds to stock price and inflation movements differently across high and low inflation sub-periods. Replicated linear estimation results of Dupor and Conley (2004)’s indicate that Fed raises its target interest rate responding to stock price gap with statistical significance. Linear estimation results, however, are not robust to small change of chosen breakpoint especially in inflation coefficient. So I construct nonlinear model as an alternative way to relax this problem and carry out test of structural change with the nonlinear framework. Consequently both nonlinearity and structural change matter in explanation of Fed’s behavior in this type of reaction function analysis. Given structural change, inflation coefficients movement shows that Fed has responded to expected inflation pressure nonlinearly across sub-period, while stock price gap coefficient shows explicit break around early ’90 in line with Dupor and Conley (2004)’s finding.
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Koza, Oldřich. "Bubliny na akciových trzích: identifikace a efekty měnové politiky." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-338788.
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This thesis studies bubbles in the U.S. stock market and how they are influenced by monetary policy pursued by the FED. Using Kalman filtering, the log-real price of S&P 500 is decomposed into a market-fundamentals component and a bubble component. The market-fundamentals component depends on the expected future dividends and the required rate of return, while the bubble component is treated as an unobserved state vector in the state-space model. The results suggest that, mainly in recent decades, the bubble has accounted for a substantial portion of S&P 500 price dynamics and might have played a significant role during major bull and bear markets. The innovation of this thesis is that it goes one step further and investigates the effects of monetary policy on both estimated components of S&P 500. For this purpose, the block- restriction VAR model is employed. The findings indicate that the decreasing interest rates have a significant short-term positive effect on the market-fundamentals component but not on the bubble. On the other hand, quantitative easing seems to have a positive effect on the bubble but not on the market-fundamentals component. Finally, the results suggest that the FED has not been successful at distinguishing between stock price movements due to fundamentals or the price misalignment.
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"The Arab Quest for Modernity: Universal Impulses vs. State Development." East Tennessee State University, 2007. http://etd-submit.etsu.edu/etd/theses/available/etd-0521107-143233/.
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GHALEHDAR, Payam. "The origins of overthrow : hegemonic expectations, emotional frustration, and the impulse to regime change." Doctoral thesis, 2015. http://hdl.handle.net/1814/35422.
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Defence date: 20 March 2015<br>Examining Board: Professor Christian Reus-Smit, University of Queensland (supervisor); Professor Jennifer Welsh, European University Institute; Professor Roland Bleiker, University of Queensland; Professor Michael Cox, London School of Economics.<br>Why has regime change, defined as military intervention aimed at forcibly transforming a target state's domestic political authority structure, been a long-standing practice in US foreign policy, used roughly two dozen times since 1900 despite its limited success in producing peace, stability and/or democracy? Extant theories fail to provide sound answers. Realist approaches, for example, under-predict the recurrence of regime change if great powers should have no reason to intervene in weaker states, or over-predict it if anything goes under anarchy. Similarly, democracy promotion arguments overstate the causal importance of the US desire to expand liberty globally. This dissertation presents a novel explanation for the recurrence of regime change in US foreign policy, arguing that the practice of regime change is predicated upon what I call 'emotional frustration', an anger-arousing emotional state that is brought about by a foreign leader's obstructive behavior perceived to be rooted in implacable hatred. While obstruction is ubiquitous in interstate interactions, I claim that the combination of hegemonic expectations towards a target state and the perception of hatred shape the extent to which a foreign leader's conduct evokes an emotional response on the part of foreign policy elites. Once emotionally frustrated, regime change becomes an attractive foreign policy instrument to decision-makers who seek a way to confront and put a stop to the obstruction of a menacing target state. It enables frustrated leaders both to permanently get rid of a perceivedly hostile foreign leader and to discharge their frustration through the use of force. Illustrating the importance of emotional frustration, I conduct four historical case studies based on primary sources, spanning almost one hundred years of US history. Regime changes in Cuba (1906), Nicaragua (1909–12), the Dominican Republic (1965), and Iraq (2003) reveal overlooked patterns of emotional frustration that have time and again animated regime change decisions.
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Chen, Chang-Jui, and 陳昶叡. "An Effective Denoise Method Based on Two-Stage Strategy for Removing Impulse Noise." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/17109566467844206903.
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碩士<br>國立中興大學<br>資訊科學與工程學系所<br>98<br>Removing noise plays an important role in digital image pre-processing. Noise effect the result of image processing directly, such as image segmentation, image fusion, and edge detection. The goal of noise removal is to suppress the noise while preserving image details. In this thesis, we propose an effective denoise method based on two-stage strategy for removing impulse noise. In the first phase, we detect noisy pixels accurately in the corrupted image by using a hierarchy of windows instead of a fixed window. In the second phase, we restore the noise candidates detected from first phase by using a modified edge-preserving regularization method. The modified edge-preserving regularization method can accurately restore the image corrupted with high noise ratio. We design two different experiments to prove that our method has a good performance. In the first experiment, we restore single ratio images. In the other experiment, we focus on the restoration of composite noise ratio images. In both experiments, the performance of our method in noise detection and image restoration is better than other methods.