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Dissertations / Theses on the topic 'Path fields'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Wang, Chun-yen. "Closed-time-path formalism for gauge field theory /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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2

Soucy, Martin. "Manipulator path planning with multi-resolution potential fields and fuzzy logic control." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27042.

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Robot path planning is an important part of the development of autonomous systems. Numerous strategies have been proposed in the literature regarding mobile robots but trajectory planning for manipulators is considerably more difficult since the entire structure can move and therefore produce collisions with surrounding obstacles. This thesis presents an original solution and analytical comparison to path planning for manipulator arms. Path planning is executed in two parts: first, a global path is found to guide the end effector in the environment using artificial potential fields and multi r

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3

Fischer, Leonardo Garcia. "3DS-BVP : a path planner for arbitrary surfaces." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/49751.

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Métodos eficientes para planejamento de caminhos têm sido explorados ao longo dos anos para permitir movimento de robôs autônomos ou agentes virtuais. Basicamente, estes algoritmos buscam pelo ambiente por um caminho com pouca probabilidade de colisão com obstáculos, e que conduza o agente de uma posição inicial para uma posição objetivo. Apesar de os primeiros algoritmos para planejamento de caminhos para calcular rotas em grafos foram apresentados a mais de 50 anos atrás, ainda existe muito trabalho sendo realizado para melhorar as técnicas existentes hoje em dia. Os algoritmos de planejamen

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4

Wei, Quantum Jichi. "Time-optimal path planning in uncertain flow fields using stochastic dynamically orthogonal level set equations." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98749.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 53-54).<br>Path-planning has many applications, ranging from self-driving cars to flying drones, and to our daily commute to work. Path-planning for autonomous underwater vehicles presents an interesting problem: the ocean flow is dynamic and unsteady. Additionally, we may not have perfect knowledge of the ocean flow. Our goal is to develop a rigorous and computationally efficient methodology to perform path-plan

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5

Bott, M. P. "A new, robust, and generic method for the quick creation of smooth paths and near time-optimal path tracking." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2095.

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Robotics has been the subject of academic study from as early as 1948. For much of this time, study has focused on very specific applications in very well controlled environments. For example, the first commercial robots (1961) were introduced in order to improve the efficiency of production lines. The tasks undertaken by these robots were simple, and all that was required of a control algorithm was speed, repetitiveness and reliability in these environments. Now however, robots are being used to move around autonomously in increasingly unpredictable environments, and the need for robotic cont

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6

Spekken, Mark. "Creating optimized machine working patterns on agricultural fields." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11152/tde-22092015-112051/.

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In the current agricultural context, agricultural machine unproductivity on fields and their impacts on soil along pathways are unavoidable. These machines have direct and indirect costs associated to their work in field, with non-productive time spent in manoeuvres when these are reaching field borders; likewise, there is a double application of product when machines are covering headlands while adding farm inputs. Both issues aggravate under irregular field geometry. Moreover, unproductive time can also appear in operations of loading/offloading the machine\'s reservoir with inputs/harvested

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7

Ribeiro, Paulo Augusto. "Campos de caminhos em variedades topológicas." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/45/45131/tde-12012011-204505/.

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Esta dissertação expõe o estudo realizado sobre o artigo de R. Brown, citado na bibliografia, e sobre os conceitos necessários para a compreensão deste material. Entre os principais conceitos e resultados preliminares discutidos, podemos citar: topologia de espaços de funções, teoria de homotopia, espaços compactos ANR, característica de Euler de um compacto ANR, teorema de Lefschetz, espaços fibrados, e campos de caminhos. Os principais resultados discutidos na dissertação são os teoremas centrais do artigo de Brown: toda n-variedade topológica compacta admite um campo de caminhos com no má

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8

Furieri, Luca. "Geometric versus Model Predictive Control based guidance algorithms for fixed-wing UAVs in the presence of very strong wind fields." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11872/.

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The recent years have witnessed increased development of small, autonomous fixed-wing Unmanned Aerial Vehicles (UAVs). In order to unlock widespread applicability of these platforms, they need to be capable of operating under a variety of environmental conditions. Due to their small size, low weight, and low speeds, they require the capability of coping with wind speeds that are approaching or even faster than the nominal airspeed. In this thesis, a nonlinear-geometric guidance strategy is presented, addressing this problem. More broadly, a methodology is proposed for the high-level control

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9

Rondelli, Andrea. "Functional methods in quantum field theory." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15839/.

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Iniziamo introducendo l'integrazione su manifold di Hilbert, tramite l'approssimazione dello spazio tangente alla varietà. Passiamo poi a descrivere due tecniche per regolarizzare integrali funzionali o di cammino quadratici (che presentano un laplaciano nell'azione): la regolarizzazione e rinormalizzazione tramite zeta function e il cutoff nel tempo proprio. Cerchiamo di confrontare i due diversi risultati (finiti) così ottenuti. Sussessivamente applichiamo l'integrazione funzionale agli integrali di cammino usando il formalismo della quantizzazione in qp-simboli ottenendo così un'ampiezza di

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10

Silva, Marcelo Oliveira da. "Campos potenciais modificados aplicados ao controle de múltiplos robôs." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-23112011-090055/.

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Este trabalho aborda o problema de planejamento de caminhos em robótica móvel autônoma utilizando campos potenciais. Dentre as várias técnicas de campos potenciais para controlar robôs, encontram-se as técnica de Campos Potenciais de Khatib1 (CP), Campo Potencial Harmônico (CPH), Campo Potencial Orientado (CPO) e Campo Potencial Localmente Orientado (CPLO). As técnicas CPH, CPO e CPLO são chamadas de técnicas baseadas em Problema de Valor de Contorno (PVC), pois são obtidas a partir de soluções de Equações Diferenciais Parciais (EDP) Elípticas em uma determinada condição de contorno, é obtido

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11

Steele, Aaron. "Ontological lockdown assessment : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Information Technology at Massey University, Palmerston North, New Zealand." Massey University, 2008. http://hdl.handle.net/10179/946.

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In order to keep shared access computers secure and stable system administrators resort to locking down the computing environment in order to prevent intentional and unintentional damage by users. Skilled attackers are often able to break out of locked down computing environments and intentionally misuse shared access computers. This misuse has resulted in cases of mass identity theft and fraud, some of which have had an estimated cost ranging in millions. In order to determine if it is possible to break out of locked down computing environments an assessment method is required. Although a num

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12

Chen, Xin. "Analytical Path to Improved RF Field Homogeneity for High Field MRI." Cleveland, Ohio : Case Western Reserve University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1237482374.

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13

Abbott, Mick. "Designing wilderness as a phenomenological landscape: design-directed research within the context of the New Zealand conservation estate." Lincoln University, 2008. http://hdl.handle.net/10182/1026.

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This research operates at both the meeting of wilderness and landscape, and also landscape architecture and design-directed research. It applies a phenomenological understanding of landscape to the New Zealand conservation estate as a means to reconsider wilderness’ prevalent framing as an untouched ‘other’. It does this through enlisting the designerly imperative found within landscape architecture as the means by which to direct this research, and through landscopic investigations located in the artefacts of cooking, haptic qualities of walking, cartographies of wilderness and a phenomenolog

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14

Santos, Joao Rafael Lucio dos. "Tópicos em defeitos deformados e o movimento Browniano." Universidade Federal da Paraíba, 2013. http://tede.biblioteca.ufpb.br:8080/handle/tede/5748.

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Made available in DSpace on 2015-05-14T12:14:12Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 3660633 bytes, checksum: 7309d28729d29dd071bc87f7c5609ebc (MD5) Previous issue date: 2013-11-20<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The non-linear science is a central topic covering several investigation areas, such as biology, chemistry, mathematics and physics. In the first part of this thesis, we studied the non-linearity in the scope of classical field theory. The discussions are based on static solutions in (1, 1) space-time dimensions, and they are

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15

Cangiotti, Nicolò. "Feynman path integral for Schrödinger equation with magnetic field." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/251697.

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Feynman path integrals introduced heuristically in the 1940s are a powerful tool used in many areas of physics, but also an intriguing mathematical challenge. In this work we used techniques of infinite dimensional integration (i.e. the infinite dimensional oscillatory integrals) in two different, but strictly connected, directions. On the one hand we construct a functional integral representation for solutions of a general high-order heat-type equations exploiting a recent generalization of infinite dimensional Fresnel integrals; in this framework we prove a a Girsanov-type formula, which is

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16

Jin, Jian. "Optimal field coverage path planning on 2D and 3D surfaces." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3389108.

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17

Musolas, Otaño Antoni M. (Antoni Maria). "Hierarchical Gaussian models for wind field estimation and path planning." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104557.

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Thesis: S.M., Massachusetts Institute of Technology, Computation for Design and Optimization Program, 2016.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 80-83).<br>Improvements in technology, autonomy, and positioning mechanisms have greatly broadened the range of application of unmanned aerial vehicles. These vehicles are now being used in aerial photography, package delivery, infrastructure inspection, and many other areas. Many of these uses demand new techniques for path planning in complex environments-in particular, spatially heterogeneous and ti

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18

Gerlach, Adam R. "Autonomous Path-Following by Approximate Inverse Dynamics and Vector Field Prediction." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1396452937.

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19

Butt, Rehman. "Performance Comparison of AI Algorithms : Anytime Algorithms." Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5845.

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Commercial computer gaming is a large growing industry that already has its major contributions in the entertainment industry of the world. One of the most important among different types of computer games are Real Time Strategy (RTS) based games. RTS games are considered being the major research subject for Artificial Intelligence (AI). But still the performance of AI in these games is poor by human standards due to some fundamental AI problems those require more research to be better solved for the RTS games. There also exist some AI algorithms those can help us solve these AI problems. Anyt

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20

Bachmann, Michael. "Path integral methods in quantum statistics, quantum field theory and membrane physics." [S.l.] : [s.n.], 2001. http://www.diss.fu-berlin.de/2001/106/index.html.

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21

Mori, Yuto. "Path optimization with neural network for sign problem in quantum field theories." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263466.

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22

Suryan, Varun. "Learning a Spatial Field in Minimum Time with a Team of Robots." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/93735.

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We study an informative path planning problem where the goal is to minimize the time required to learn a spatial field. Specifically, our goal is to ensure that the mean square error between the learned and actual fields is below a predefined value. We study three versions of the problem. In the placement version, the objective is to minimize the number of measurement locations. In the mobile robot version, we seek to minimize the total time required to visit and collect measurements from the measurement locations. A multi-robot version is studied as well where the objective is to minimize the

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23

Constantino, Eugenio Pereira Araujo. "Sinogram recovery algorithms for hard-field tomography with low number of path integrals." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494599.

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Imaging from limited data is a common practice in many industrial tomography applications where sensor design often assumes an irregular approach with low number of measurements. In hard-field tomography, where access restrictions forbid the continuous scanning around the subject, the measurements represent an undersampled set of data resulting in a sparse sinogram and a reconstructed image with severe artefacts.

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24

Abdel, Wahid Mohamed Hussein Mabrouk. "Overcoming local minima in artificial potentail field path-planning using internal agent states." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501868.

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25

Davis, John E. "Application of the Schwinger closed time-path method to relativistic quantum field theory /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487694389393565.

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26

Anderson, Isobel. "My words trace a path : encounters with place through voice, performance and field recording." Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.695216.

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Through a creative portfolio of autotopographic sound works and a written thesis, this research explores the role of sound within individual and collective constructions of place. The process of walking in specific locations has generated materials such as text, field recordings, photographs, and objects, which together form a body of site-specific work that includes soundwalks, fixed audio pieces, installations and live performances. The voices present in these works are often disembodied, and play with language and time to test the possibilities of re-contextualising, or mis-'placing', the b

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27

Cangan, Barnabas Gavin. "Risk-Aware Human-In-The-Loop Multi-Robot Path Planning for Lost Person Search and Rescue." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/91444.

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We introduce a framework that would enable using autonomous aerial vehicles in search and rescue scenarios associated with missing person incidents to assist human searchers. We formulate a lost person behavior model and a human searcher model informed by data collected from past search missions. These models are used to generate a probabilistic heatmap of the lost person's position and anticipated searcher trajectories. We use Gaussian processes with a Gibbs' kernel for data fusion to accurately model a limited field-of-view sensor. Our algorithm thereby computes a set of trajectories for a t

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28

Bennett, Edmund. "Exotic order in magnetic systems from Majorana fermions." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/9437.

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This thesis explores the theoretical representation of localised electrons in magnetic systems, using Majorana fermions. A motivation is provided for the Majorana fermion representation, which is then developed and applied as a mean-field theory and in the path-integral formalism to the Ising model in transversal-field (TFIM) in one, two and three dimensions, on an orthonormal lattice. In one dimension the development of domain walls precludes long-range order in discrete systems; this is as free energy savings due to entropy outweigh the energetic cost of a domain wall. An argument due to Pei

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29

Nelson, Derek R. "Cooperative Control of Miniature Air Vehicles." BYU ScholarsArchive, 2005. https://scholarsarchive.byu.edu/etd/1095.

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Cooperative control for miniature air vehicles (MAVs) is currently a highly researched topic. There are many application for which MAVs are well suited, including fire monitoring, surveillance and reconaissance, and search and rescue missions. All of these applications can be carried out more effictively by a team of MAVs than by a single vehicle. As technologies for microcontrollers and small sensors have improved so have the capabilities of MAVs. This improvement in MAV performance abilities increases the possibility for cooperative missions. The focus of this research was on cooperative tim

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30

Bergeron, Mario. "Coherent state path integral for the harmonic oscillator and a spin particle in a constant magnetic field." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27391.

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The definition and formulas for the harmonic oscillator coherent states and spin coherent states are reviewed in detail. The path integral formalism is also reviewed with its relation and the partition function of a sytem is also reviewed. The harmonic oscillator coherent state path integral is evaluated exactly at the discrete level, and its relation with various regularizations is established. The use of harmonic oscillator coherent states and spin coherent states for the computation of the path integral for a particle of spin s put in a magnetic field is caried out in several ways, and a ca

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31

Baldassaro, Paige Marie. "RF and GIS: Field Strength Prediction for Frequencies between 900 MHz and 28 GHz." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34724.

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This thesis presents a model to predict signal strength for frequencies between 902 MHz and 28 GHz. The model approximates diffraction using the knife-edge concept and equations proposed by Lee (1985). LOS pathways are calculated using the Bresenham algorithm and the corresponding elevations are obtained from a 30m DEM base map. The base map was generated by the procedure outlined in Rose (2001) and includes building elevations. The effect of Fresnel zones on prediction accuracy is considered. The effect of interpolating elevations along the Bresenham line is also considered. An Inverse

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32

Vassura, Edoardo. "Path integrals on curved space and the worldline formalism." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13448/.

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Lo scopo primario di questa tesi e' l’analisi di una nuova procedura di regolarizzazione di path integral su spazi curvi, presentata inizialmente dal fisico J. Guven e applicata al caso di una teoria di campo scalare , ma mai utilizzata per svolgere ulteriori calcoli espliciti. Questa procedura, se corretta, permetterebbe di utilizzare il formalismo di path integral su spazi piatti anche nel caso in cui la varieta' di background risulti localmente curva. Tale procedura trasforma di fatto un modello sigma non lineare in un modello efficace lineare, permettando pertanto di aggirare le usuali com

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33

Zandonadi, Rodrigo S. "COMPUTATIONAL TOOLS FOR IMPROVING ROUTE PLANNING IN AGRICULTURAL FIELD OPERATIONS." UKnowledge, 2012. http://uknowledge.uky.edu/bae_etds/11.

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In farming operation, machinery represents a major cost; therefore, good fleet management can have a great impact on the producer’s profit, especially considering the increasing costs of fuel and production inputs in recent years. One of the tasks to be accomplished in order to improve fleet management is planning the path that the machine should take to cover the field while working. Information such as distance traveled, time and fuel consumption as well as agricultural inputs wasted due to off-target-application areas are crucial in the path planning process. Parameters such as field bounda

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34

Kumazawa, Guillermo Hiroki. "Generating efficient milling tool paths according to a preferred feed direction field." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43653.

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A new method is presented to generate ball-end milling tool paths for the efficient three-axis machining of sculptured surfaces. The fundamental principle of the presented method is to generate the tool paths according to a preferred feed direction (PFD) field derived from the surface to be machined. In this work, the PFD at any point on the surface is the feed direction that maximizes the machining strip width. Theoretically, tool paths that always follow the direction of maximum machining strip width at each cutter contact point on the surface would maximize material removal, which leads to

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35

Doudak, Ghasan. "Field determination and modeling of load paths in wood light-frame structures." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100352.

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Low-rise buildings, constructed using wood, are vulnerable to extreme wind storms and earthquakes. While several experimental measurements of the environmental loads (mostly wind) on the building envelope have been made at full scale, none of these studies directly linked these external loads with the internal forces and displacements of the structure, as achieved in this research.<br>The thesis presents the experimental and analytical work on two light-frame wooden structures, where one already existed (Forintek shed in Quebec City) and the other (UNB house) was built specifically for the res

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Ainslie, Michael Anthony. "The sound pressure field in the ocean due to bottom interacting paths." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314950.

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Buck, Alexander J. (Alexander James) 1989. "Path planning and position control and of an underactued [sic] electromagnetic formation flight satellite system in the near field." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82502.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2013.<br>This thesis was scanned as part of an electronic thesis pilot project.<br>Cataloged from PDF version of thesis<br>Includes bibliographical references (p. 117-119).<br>Electromagnetic formation flight is the process of using electromagnetic actuators (coils) on multiple spacecraft to produce relative (internal) forces in order to control the relative position and orientation of the spacecraft. This thesis demonstrates the ability to experimentally generate the relative internal electromagnetic

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Manoranjan, Jotham Vaddaboina. "Relative timing based verification and design with delay insensitive signal path modeling with application for field programmable gate arrays." Thesis, The University of Utah, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10272453.

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<p>The relative timing (RT) based asynchronous design methodology has been successfully used to create application specific integrated circuit (ASIC) designs that are a process generation ahead of their synchronous counterparts in terms of power, performance and energy. However, while the implementation of RT asynchronous circuits has been dealt with successfully in the ASIC domain, there has been limited exploration of utilizing the design methodology on field programmable gate arrays (FPGAs). This dissertation seeks to address the challenges in implementing RT asynchronous circuits on FPGAs

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Susinskas, Larisa Diana. "Field Observation of Installation and Performance of Repair Materials." Cleveland State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=csu1471613271.

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Zhou, Qiping. "Near-field microwave imaging with coherent and interferometric reconstruction methods." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1591903415194694.

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Kringberg, Fredrika. "A Path Planning Approach for Context Aware Autonomous UAVs used for Surveying Areas in Developing Regions." Thesis, KTH, Mekatronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235926.

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Developing regions are often characterized by large areas that are poorly reachable or explored. The mapping and census of roaming populations in these areas are often difficult and sporadic. A recent spark in the development of small aerial vehicles has made them the perfect tool to efficiently and accurately monitor these areas. This paper presents an approach to aid area surveying through the use of Unmanned Aerial Vehicles. The two main components of this approach are an efficient on-device deep learning object identification component to capture and infer images with acceptable performanc

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Owen, Mark Andrew. "Aerial Rendezvous Between an Unmanned Air Vehicle and an Orbiting Target Vehicle." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2881.

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In this thesis we develop methods that facilitate an aerial rendezvous between two air vehicles. The objective of this research is to produce a method that can be used to insert a miniature air vehicle behind a rendezvous vehicle and then track that vehicle to enable a visual rendezvous. For this research we assume the rendezvous vehicle is following a relatively stable and roughly elliptical orbit. Path planners and controllers have been developed that can be used to effectively intercept the rendezvous vehicle by inserting the MAV onto the orbit of interest. A method for planning and followi

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Mackenzie, Anne I. Rao S. M. "Paired pulse basis functions and triangular patch modeling for the method of moments calculation of electromagnetic scattering from three-dimensional, arbitrarily-shaped bodies." Auburn, Ala., 2008. http://hdl.handle.net/10415/1447.

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44

Adnan, S. "Ultra-wideband antenna design for microwave imaging applications. Design, optimisation and development of ultra-wideband antennas for microwave near-field sensing tools, and study the matching and radiation purity of these antennas within near field environment." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5750.

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Near field imaging using microwave in medical applications has gain much attention recently as various researches show its high ability and accuracy in illuminating object comparing to the well-known screening tools such as Magnetic Resonance Imaging (MRI), digital mammography, ultrasound etc. This has encourage and motivate scientists continue to exploit the potential of microwave imaging so that a better and more powerful sensing tools can be developed. This thesis documents the development of antenna design for microwave imaging application such as breast cancer detection. The application

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Xu, Zhibing. "Statistical Modeling and Predictions Based on Field Data and Dynamic Covariates." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/51130.

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Reliability analysis plays an important role in keeping manufacturers in a competitive position. It can be applied in many areas such as warranty predictions, maintenance scheduling, spare parts provisioning, and risk assessment. This dissertation focuses on statistical modeling and predictions based on lifetime data, degradation data, and recurrent event data. The datasets used in this dissertation come from the field, and have complicated structures. The dissertation consists of three main chapters, in addition to Chapter 1 which is the introduction chapter, and Chapter 5 which is the genera

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Elliniadis, Panagiotis. "An investigation of near fields for HF shipboard antennas: surface PATCH and wire grid modeling using the Numerical Electromagnetics Code." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/23280.

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Approved for public release; distribution is unlimited<br>The Numerical Electromagnetics Code (NEC) was used to evaluate the admittance, average power gain, and the electric near and far field of a monopole antenna mounted on a cubical box over a perfectly conducting ground plane. Two models of the box, employing surface patches and wire grids, were evaluated. The monopole was positioned at the center, the edge, and at a corner of the box's top surface. Admittance and average power gain of the antenna were calculated. NEC results were examined and compared with experimental data and with r

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Adnan, Shahid. "Ultra-wideband antenna design for microwave imaging applications : design, optimisation and development of ultra-wideband antennas for microwave near-field sensing tools, and study the matching and radiation purity of these antennas within near field environment." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5750.

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Near field imaging using microwave in medical applications has gain much attention recently as various researches show its high ability and accuracy in illuminating object comparing to the well-known screening tools such as Magnetic Resonance Imaging (MRI), digital mammography, ultrasound etc. This has encourage and motivate scientists continue to exploit the potential of microwave imaging so that a better and more powerful sensing tools can be developed. This thesis documents the development of antenna design for microwave imaging application such as breast cancer detection. The application i

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Forsvik, Sandra. "“Fight is an inside path” : A minor field study of how members of Nur Ashki Jerrahi Sufi Order perceive religious freedom in Mexico." Thesis, Södertörns högskola, Institutionen för historia och samtidsstudier, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-27885.

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The interests for academic studies of contemporary Sufism and Sufism in non-Islamic countries have become more popular, but little has been done in Latin America. The studies of Islam in this continent are limited and studies on Sufism in Mexico seem to be an unexplored area. As a student of journalism target religion I see this as an important topic that can generate new information for the study of Sufism. This thesis is therefore aimed to describe the group of Sufis I have chosen to study, Nur Ashki Jerrahi Sufi Order in Mexico, linked to Human Rights in form of how members of the Sufi orde

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Jeong, Jaehoon. "Analytical time domain electromagnetic field propagators and closed-form solutions for transmission lines." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1105.

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Silveira, Renato. "Configurable flows." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/117770.

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Nós refinamos o planejador introduzindo uma nova forma para o núcleo da equação que permite facilmente lidar com terrenos não-homogêneos. Isto é obtido através de mudanças locais na concavidade/convexidade do potencial, criando regiões com altas ou baixas preferências de navegação. Nós integramos esta nova equação ao planejador hierárquico, surgindo uma ampla variedade de aplicações. Nossa proposta contribui para diversas áreas incluindo a navegação de agentes, pathfinding em jogos, simulação de multidões, e a navegação de robôs. Nossas publicações reforçam a relevância e robustez do método pr

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