Дисертації з теми "Content constraints"
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Lakay, Elthea Trevolee. "SIP-based content development for wireless mobile devices with delay constraints." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_9048_1182233050.
Повний текст джерелаSIP is receiving much attention these days and it seems to be the most promising candidate as a signaling protocol for the current and future IP telephony services. Realizing this, there is the obvious need to provide a certain level of quality comparable to the traditional telephone service signalling system. Thus, we identified the major costs of SIP, which were found to be delay and security. This thesis discusses the costs of SIP, the solutions for the major costs, and the development of a low cost SIP application. The literature review of the components used to develop such a service is discussed, the networks in which the SIP is used are outlined, and some SIP applications and services previously designed are discussed. A simulation environment is then designed and implemented for the instant messaging service for wireless devices. This environment simulates the average delay in LAN and WLAN in different scenarios, to analyze in which scenario the system has the lowest costs and delay constraints.
Fragkoudi, Frantzeska. "Modelling peanuts in barred galaxies : gas flows and constraints on the dark matter content." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4747/document.
Повний текст джерелаBy exploring the dynamics of galaxies we obtain a wealth of information regarding their various mass components, their formation and evolution. In this thesis I make extensive use of dynamical models obtained directly from images of observed galaxies. I therefore start by improving these models by including the geometry of boxy/peanut (B/P) bulges, and quantifying their effects on the models. B/P bulges have a significant effect on the potential, forces, orbital structure and bar strength of the models, and as such should be included in order to make them as accurate as possible. I then employ dynamical models with and without B/P bulges to determine their effect on gas inflow to the central regions. I show that in the presence of B/P bulges the bar strength is reduced, as is the amount of gas inflow, leading to smaller mass concentrations in the centres of galaxies. Furthermore, I employ dynamical models to carry out a detailed study of the nearby galaxy NGC 1291. I use the non-axisymmetric nature of the bar, which induces shocks in the gas - thus creating dust lanes along the leading edges of the bar - to put constraints on the mass-to-light ratio of the disc. The results argue strongly that NGC 1291 has a maximal disc, i.e. that in the central regions, baryonic matter dominates over the dark matter. Furthermore I place limits on the pattern speed of the bar, showing that the bar rotates fast. I thus demonstrate that the dynamical method used can provide constraints on the dark matter distribution of observed galaxies, and therefore also on current models of galaxy formation and evolution
Ng, Mo Ching Norma. "Commercial constraints and news content : a comparative study of quality newspapers in France and in the U.S." HKBU Institutional Repository, 2004. http://repository.hkbu.edu.hk/etd_ra/611.
Повний текст джерелаJuhász, Attila. "Diagenetic constraints on the paleohydrodynamic and thermal reconstruction of neogene sediments at the Békés Basin - Battonya high hydrocarbon province, SE Hungary /." [S.l.] : [s.n.], 1999. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.
Повний текст джерелаWeigel, Gerolf. "The soils of the Maybar/Wello and Gununo/Sidamo area : their potential and constraints for agricultural development : a case study in the Ethiopian Highlands /." [S.l.] : [s.n.], 1986. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.
Повний текст джерелаNakata, Dorene Samantha. "Syn-eruptive degassing of a single submarine lava flow : constraints on MORB CO₂ variability, vesiculation, and eruption dynamics." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1912/3933.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 33-37).
Mid-ocean ridge basalts (MORBs) exhibit a wide range of CO2 concentrations, reflecting saturation to supersaturation (and rarely undersaturation) relative to their emplacement depths. In this study, we explore the mechanisms of CO2 degassing and the implications this has for estimating the advance rates and durations of seafloor eruptions. We present dissolved volatile concentrations (mainly of CO 2 and H20) and vesicle size distributions (VSDs) for a unique suite of MORB glasses collected at the East Pacific Rise, ~9° 50' N. These MORB glasses were collected at -200 m intervals along an across-axis track over a single flow pathway within the recently emplaced 2005-06 eruption boundaries; systematic sample collection provides one of the first opportunities to characterize intra-flow geochemical and physical evolution during a single eruption at a fast-spreading ridge. Compared to measurements of MORB volatiles globally, dissolved H20 concentrations are relatively uniform (0.10 - 0.16 weight percent), whereas dissolved CO2 contents exhibit a range of concentrations (154 - 278 ppm) and decrease with distance from the EPR axis (i.e., eruptive vent). Ion microprobe analysis of dissolved volatiles within the MORB glasses suggest that the magma erupted supersaturated (pressure equilibrium with 920 - 1224 mbsf) and in near-equilibrium with the melt lens of the axial magma chamber (~1250 - 1500 mbsf), and degassed to near equilibrium (299 - 447 mbsf) with seafloor depths over the length of the flow. The decrease in CO 2 concentrations spans nearly the full range of dissolved CO2 contents observed at the EPR and shows that the varying degrees of volatile saturation that have been observed in other MORB sample suites may be explained by degassing during emplacement. Vesicularity (0.1 - 1.2%) increases with decreasing dissolved CO2 concentrations. We use vesicle size distributions (VSDs)-vesicle sizes and number densities-to quantify the physical evolution of the CO2 degassing process. VSDs suggest that diffusion of CO2 into preexisting vesicles, and not nucleation of new vesicles, is the dominant mechanism of increasing CO2 in the vapor phase. We also use VSDs, along with estimates of vesicle growth rates, to constrain emplacement time of the 2005-06 eruption to <~24 hours and to resolve variations in advance rate with down flow distance.
by Dorene Samantha Nakata.
S.M.
Kutty, Sangeetha. "Enriching XML documents clustering by using concise structure and content." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/48326/1/Sangeetha_Kutty_Thesis.pdf.
Повний текст джерелаLi, Pei. "Water contents and lithium isotope compositions of the Mesozoic-Cenozoic lithospheric mantle of eastern North China Craton : constraints from peridotite xenoliths." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0415/document.
Повний текст джерелаIn order to investigate the geodynamic cause for destruction of the North China Craton (NCC), the role of mantle fluids is examined. The aim of the PHD work is to clarify H2O contents and lithium isotopic compositions of the NCC lithospheric mantle by studying peridotite xenoliths hosted by Mesozoic-Cenozoic basalts across eastern NCC. A temporal variation of H2O content has been revealed, and it has deep implications for processes of craton destruction. The Cenozoic lithospheric mantle was featured by low H2O content, interpreted to be the relict mantle that survived the lithospheric thinning and has been dewatered by reheating from upwelling asthenospheric flow. The late-Mesozoic lithospheric mantle showed relatively high H2O content, a hydrous status intermediate between the Cretaceous hydration and the Cenozoic dryness, indicating the dehydration of the NCC mantle with time during NCC destruction. The dehydration, facilitated by thinning of weak mantle pieces at bottom, is one way by which the lithosphere strengthens itself to survive in the convecting mantle. Extreme Li and isotopic disequilibria were observed intra- and inter-mineral in the peridotites. With numerical simulations, we demonstrate two superimposed Li enrichment events occurring at the mantle: a limited Li enrichment (< 5 ppm) and large delta7Li depletion (-20~-10[per 1000]) of the mantle domain, followed by a recent and transient infiltration of high Li and delta7Li (up to +20 [per 1000]) melts/fluids. The anomalous Li isotopic compositions of mantle metasomatic agents call upon the same of their mantle sources, and we assume recycled components, both Li isotopically heavy and light, in the mantle beneath the eastern NCC
Miozzi, Ferrini Francesca. "Experimental study of the Fe-Si-C system and application to carbon rich exoplanet." Electronic Thesis or Diss., Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2019SORUS241.pdf.
Повний текст джерелаMore than 4000 exoplanets have been discovered, orbiting around stars with a wide variety of composition. Such planets are detected and studied through indirect methods that in many cases give access to the main properties of the planets: mass and radius. The same parameters can be calculated from a chosen model and compared to the observed ones. However it is difficult for planets orbiting around stars with compositions very different from our Sun, for example carbon enriched, as the physical properties carbides (i.e. silicon carbides and iron carbides) at extreme pressure are unknown. In this work the Si-C and Fe-Si-C systems were studied in the range between 20 and 200 GPa and 300-3000 K employing X-ray diffraction and chemical analyses on the recovered samples were used to determine the physical properties at extreme conditions. In the Si-C system the equations of state and thermal model for both the low pressure and high pressure phases were determined. The results were then used to model a mass radius plot for different archetypal planets with a Fe core and SiC mantle. Regarding the Fe-Si-C system a ternary phase diagram was reconstructed up to 200 GPa and 3000 K. Assuming Fe-Si-C as main component of planetary cores, four different crystallization paths are individuated, giving rise to way different dynamical behaviour. We conclude that using only mass radius relations is not sufficient to determine the interior composition and structure of an observed exoplanet and further data relative to the chemistry are needed, for example the composition of the host star
Bengtsson, Daniel, and Johan Melin. "Constrained procedural floor plan generation for game environments." Thesis, Blekinge Tekniska Högskola, Institutionen för kreativa teknologier, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13006.
Повний текст джерелаBakgrund: Procedural content generation (PCG) har blivit ett alltmer viktigt ämne allteftersom kravet på mängden innehåll i moderna spel har ökat. Paradox Arctic är en spelutvecklingsstudio vars målsättning är att ligga i teknologins framkant och de är därför intresserade av att vidareutveckla sin kompetens inom PCG. Av denna anledning har de uttryckt intresse för ett samarbete inom området “procedurell generering av planlösningar”. Syfte: Det huvudsakliga syftet med detta arbete är att undersöka huruvida lösningar baserade på att växa ytor, fördela ytor i mindre delar eller en kombination av dessa, kan användas för att skapa trovärdiga och varierade planlösningar för spelmiljöer, utan att bryta förutbestämda krav. Metod: En lösning som procedurellt genererar planlösningar genom att växa och/eller fördela dem har implementerats och en undersökning, med syftet att utvärdera trovärdigheten och variationen i de genererade planlösningarna, har utförts. Resultat & Slutsatser: Lösningen som baseras på fördelning av ytor och den kombinerade lösningen, visades av resultaten kräva ytterliggare arbete för att anses generera trovärdiga resultat. Lösningen som baseras på att växa ytor däremot, visade positiva trovärdighetsresultat när små och medelstora planlösningar genererades. Detta goda resultat uppstod dock på bekostnaden av variation mellan de genererade planlösningarna.
Rosales, Gallegos Carlos. "Grasp plannind under task-specific contact constraints." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/116770.
Повний текст джерелаMovahhed, Abdolmohammad. "Context and constraints in Stanley Fish's reader-response theory." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510849.
Повний текст джерелаSnead, Kathleen Benton. "Contextual Constraints: An Examination of Implicit Followership Theories." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/41437.
Повний текст джерелаMaster of Science
He, Jun. "Constraints for Membership in Formal Languages under Systematic Search and Stochastic Local Search." Doctoral thesis, Uppsala universitet, Avdelningen för datalogi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-196347.
Повний текст джерелаNehra, Ram S. "Modeling time space prism constraints in a developing country context." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000299.
Повний текст джерелаBübl, Felix. "Tracing crosscutting requirements for component based systems via context based constraints." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=976731169.
Повний текст джерелаMay, Richard John. "Perceptual content loss in bit rate constrained IFS encoded speech." Thesis, University of Portsmouth, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396323.
Повний текст джерелаHollis, Geoff R. "The Role of Task Constraints in Ambiguity Resolution." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1282168797.
Повний текст джерелаAndereck, Michael. "Procedural Terrain Generation Based on Constraint Paths." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1388357258.
Повний текст джерелаKaratas, Ahmet Serkan. "Analysis Of Extended Feature Models With Constraint Programming." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12612082/index.pdf.
Повний текст джерелаHOLANDA, AUREA SILVA DE. "ANALYSIS OF THE EQUILIBRIUM AND STABILITY OF PLATES WITH CONTACT CONSTRAINTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2000. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=2002@1.
Повний текст джерелаNeste trabalho é desenvolvida uma metodologia baseada no Método dos Elementos Finitos para estudar o equilíbrio e a estabilidade de placas apoiadas em fundações elásticas. A formulação utilizada para a análise de placas é válida para a análise linear e não-linear de placas isotrópicas ou ortotrópicas, perfeitas ou inicialmente imperfeitas. Esta formulação é baseada nas teorias de placas de Mindlin e von Kármán e na teoria de cascas abatidas proposta por Marguerre. As placas podem estar apoiadas em fundações lineares ou não-lineares, que são modeladas utilizando elementos finitos isoparamétricos. A fundação não-linear contém termos cúbicos e quadráticos, de modo a permitir uma representação mais realista do seu comportamento. Na obtenção dos caminhos não-lineares de equilíbrio das estruturas, diferentes métodos incrementais-iterativos são utilizados. Com o objetivo de considerar o problema de contato unilateral, duas formulações que utilizam técnicas de Programação Matemática são implementadas, sendo uma para a análise linear e outra para a análise não-linear. Além dessas formulações, o problema de contato unilateral pode ser tratado através do uso de um modelo constitutivo de fundação não resistente à tração também implementado neste trabalho. Exemplos de equilíbrio e de estabilidade são apresentados e, quando possível, os resultados são comparados com os existentes na literatura. Através destes exemplos, estuda-se a influência da não-linearidade da placa e da fundação, das imperfeições geométricas iniciais e do tipo de contato (unilateral ou bilateral) na capacidade de carga e estabilidade da placa. Também é discutida a influência do uso de diferentes malhas de elementos finitos nestes resultados, bem como a eficiência computacional das metodologias utilizadas para lidar com o contato unilateral.
In this work, a finite element formulation to study the equilibrium and the stability of plates on elastic foundations is developed. This formulation can be used for linear and nonlinear analyses of isotropic or orthotropic, perfect or initially imperfect plates. It is based on Mindlin`s and von Kármán`s plate theories and on the shallow shell theory proposed by Marguerre.The plates can be on linear or non-linear foundations modeled using isoparametric finite elements. The non-linear foundation contains cubic and quadratic terms to allow a more realistic representation of its behavior. In order to obtain the equilibrium path of the structure, different incremental-iterative methods are employed.Two different strategies are implemented to solve the unilateral contact problem. In the first one, two formulations that use optimization techniques are developed, one for the linear analysis and the other one for non-linear analysis. The second strategy modifies the constitutive relation of the foundation in order to simulate its tensionless behavior.Equilibrium and stability examples are presented and, whenever possible, the results are compared with the ones found in the literature. In these examples, the influence of the non-linearities of the plate and the foundation, of initial geometric imperfections, and of the type of contact (unilateral or bilateral) on the load capacity and stability of the plate is studied. The influence of different finite element meshes on the results and the computational efficiency of the methodologies used to solve the unilateral contact problem are also discussed.
En este trabajo se desarrolla una metodología basada en el Método de los Elementos Finitos para estudiar el equilibrio y la estabilidad de placas apoyadas en fundaciones elásticas. La formulación utilizada para el análisis de placas es válida para el análisis lineal y no lineal de placas isotrópicas o ortotrópicas, perhechas o inicialmente imperhechas. Esta formulación tiene como base las teorías de placas de Mindlin y von Kármán y en la teoría propuesta por Marguerre. Las placas pueden estar apoyadas en fundaciones lineales o no lineales, que son modeladas utilizando elementos finitos isoparamétricos. La fundación no lineal contiene términos cúbicos y cuadráticos, de modo que permita una representación más realista del su comportamiento. En la obtención de los caminos no lineales de equilibrio de las extructuras, se utilizaron diferentes métodos incrementales iterativos. Con el objetivo de considerar el problema de contacto unilateral, se implementan dos formulaciones que utilizan técnicas de Programación Matemática, una para el análisis lineal y otra para el análisis no lineal. Además de esas formulaciones, el problema de contacto unilateral puede ser tratado a través del uso de un modelo constitutivo de fundación no resistente a la tracción, que también es implementado en este trabajo. Se presentan ejemplos de equilíbrio y de estabilidad y, cuando posible, se comparan los resultados con los existentes en la literatura. A través de estos ejemplos, se estudia la influencia de la no linealidad de la placa y de la fundación, de las imperfecciones geométricas iniciales y del tipo de contacto (unilateral o bilateral) en la capacidad de carga y la estabilidad de la placa. También se discute la influencia del uso de diferentes mallas de elementos finitos em estos resultados, así como la eficiencia computacional de las metodologías utilizadas para tratar el contacto unilateral.
Russell, Scott Raymond. "Interacting constraints shape emergent decision-making of referees." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/61021/1/Scott%20Russell%20Thesis.pdf.
Повний текст джерелаDitzel, Kropiwiec Cássio. "Framework for distributed firewall administration in a multi-constraint security policies context." Paris 6, 2009. http://www.theses.fr/2009PA066162.
Повний текст джерелаErnst, Antonia 1976. "Project and procurement method selection in the context of portfolio consideration and financial constraints." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/80974.
Повний текст джерелаKalpundi, Ganesh R. "Nonlinear mixed finite element analysis for contact problems by a penalty constraint technique." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06302009-040252/.
Повний текст джерелаau, A. Stebbins@murdoch edu, and Andrew Stebbins. "The Chinese Civilizing Process: Eliasian Thought as an Effective Analytical Tool for the Chinese Cultural Context." Murdoch University, 2009. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20100211.123651.
Повний текст джерелаErickson, Darren Andrew. "Contact stiffness and damping estimation for constrained robotic systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq53042.pdf.
Повний текст джерелаRodrigues, Tabajara Krausburg. "Constrained coalition formation among heterogeneous agents for the multi-agent programming contest." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2018. http://tede2.pucrs.br/tede2/handle/tede/8102.
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Esta disserta??o apresenta um estudo sobre forma??o de coaliz?es entre agentes heterog?neos para a competi??o de programa??o multiagente de 2017. Foi investigado e aplicado a forma??o de estruturas de coaliz?es entre agentes para resolver problemas log?sticos simulados sobre o mapa de uma cidade real. A fim de atingir o objetivo deste trabalho, foram integrados algoritmos formadores de coaliz?es na plataforma JaCaMo por meio de um artefato CArtAgO chamado CFArtefact. Foi utilizada a implementa??o provida pelo time SMART-JaCaMo (time participante da competi??o multiagente), para experimentar a forma??o de coaliz?es na competi??o. Tr?s abordagens foram avaliadas no dom?nio da competi??o em diferentes configura??es. A primeira abordagem utiliza somente aloca??o de tarefas para resolver o problema. A segunda e a terceira abordagem utilizam a t?cnica de forma??o de coaliz?es anteriormente ? aloca??o de tarefas; dentre estas abordagens, uma utiliza um algor?timo ?timo para resolver o problema e a outra um heur?stico. As an?lises dos experimentos realizados mostram que algor?timos formadores de coaliz?es podem melhorar a performance do time participante da competi??o quando a taxa de trabalhos gerados pelo simulador ? baixa. Entretanto, conforme a taxa de trabalhos aumenta, a abordagem que realiza somente aloca??o de tarefas obt?m um desempenho melhor quando comparada as demais. Mesmo a abordagem heur?stica tem desempenho pr?ximo ? abordagem ?tima para coaliz?es. Desta forma, ? poss?vel concluir que forma??o de coaliz?es possui grande valia para balancear os agentes para um conjunto de trabalhos que precisa ser completado.
This work focuses on coalition formation among heterogeneous agents for the 2017 multiagent programming contest. An agent is a computer system that is capable of independent action to achieve its goals. In order to increase the effectiveness of the agents, we can organise them into coalitions, in which the agents collaborate with each other to achieve individual or common goals. We investigate and apply coalition structure generation (the first activity of the coalition formation process) in simulated scenarios, specifically the 2017 contest scenario, where the agents forming a competing team cooperate to solve logistic problems simulated on the map of a real city. In order to achieve our goal, we integrate coalition formation algorithms into the JaCaMo platform by means of a CArtAgO artefact, named CFArtefact. We use the implementation of the SMART JaCaMo team for experimenting with the coalition formation approach in the contest scenario. We experiment on three approaches in the contest domain with different configurations. In the first, we use only a taskallocation mechanism, while the other approaches use an optimal coalition formation algorithm and a heuristic coalition formation algorithm. We conducted several experiments to compare the advantages of each approach. Our results show that coalition formation algorithms can improve the performance of a participating team when dealing with low job rates (i.e., how quickly new jobs are created by the simulation). However, as we increase the job rate, the approach using only task allocation has better performance. Even a heuristic coalition formation approach has close performance to the optimal one in that case. Coalition formation can play an important role when we aim to balance each group of agents to accomplish some particular goal given a larger team of cooperating agents.
Rivière, Laura. "Etude de l'importance relative des contraintes linguistiques et extralinguistiques conduisant à la compréhension de l'ironie." Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0284.
Повний текст джерелаThe objective of this thesis was, using the framework of the Constraints Satisfaction model, to determine, for the first time in French, the role played by several types of constraints (i.e., pragmatic, linguistic and sociocultural) in the understanding of ironic criticisms and ironic praises.The results of a first experiment, in which we used a listening task, showed that the incongruity between the context and the utterance was a stronger cue than prosody in the understanding of ironic critics. Indeed, we showed that while all participants, in their interpretations, relied on contextual information, only some participants also used prosodic cues. The results of the two subsequent experiments, consisting of written tasks, confirmed the main role played by pragmatic constraints in irony understanding, and particularly in understanding of ironic criticisms. Our results also highlighted the contribution, while at a lower level than pragmatic constraints, of sociocultural constraints of the participants in the irony understanding. Our results also confirmed the asymmetry of irony and showed that the pragmatic constraints contributing to the understanding of ironic praises would be different from those contributing to the understanding of ironic criticism
Hetet, John Stephen Tawhana. "A literary underground in Restoration England : printers and dissenters in the context of constraints, 1660-1689." Thesis, University of Cambridge, 1987. https://www.repository.cam.ac.uk/handle/1810/250909.
Повний текст джерелаNilan, Michael Sanford. "Structural constraints and situational information seeking : a test of two predictors in a sense-making context /." Thesis, Connect to this title online; UW restricted, 1985. http://hdl.handle.net/1773/6185.
Повний текст джерелаWoerner, Kyle. "Multi-contact protocol-constrained collision avoidance for autonomous marine vehicles." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104118.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages [294]-[301]).
The field of autonomous collision avoidance has continued to advance in many areas including sensory and perception, navigation, payload integration, and collision avoidance. The advances in collision avoidance, however, have largely focused on iterative changes to the velocity obstacle - an algorithm that inherently loses important collision avoidance information key to replicating a human-like decision space. This thesis examines algorithms that generalize the traditional velocity obstacle into a multi-threshold based approach that more realistically represent and evaluate human ship driving practices. Novel protocol-constrained collision avoidance evaluation algorithms are proposed including the ability to perform both on-line and post-mission analysis of both robots and humans. These algorithms become especially important when considering complex missions of competing objectives in a contact-dense, protocol-constrained collision avoidance environment. Introduction of competing performance metrics consistent with human ship driving practices allows autonomous collision avoidance algorithm designers to consider previously unexplored tradespaces. On-water results of up to five simultaneously interacting autonomous vessels validate the collision avoidance algorithms using four key areas of evaluation: spatial efficiency, temporal efficiency, protocol compliance, and safety. Testing of 10 complex scenarios totaled over 6,150 vehicle-pair on-water encounters. Human-robot field experimentation demonstrated autonomous collision avoidance performance under conflicting protocol requirements of COLREGS while interacting with human-driven vessels. An autonomous collision avoidance "road test" framework is proposed to incorporate testing of arbitrary collision avoidance algorithms both in the field and in simulation.
by Kyle Woerner.
Ph. D.
Maung, David. "Tile-based Method for Procedural Content Generation." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461077485.
Повний текст джерелаLane, Murray C. "The development of a carrying capacity assessment model for the Australian socio-environmental context." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/67485/1/Murray_Lane_Thesis.pdf.
Повний текст джерелаRubin, Ori. "Contact between parents and adult children: The role of time constraints, commuting and automobility." Elsevier, 2015. https://publish.fid-move.qucosa.de/id/qucosa%3A72786.
Повний текст джерелаAsuquo, Philip Michael. "A decentralised and context-aware trust management scheme for resource-constrained emergency communications." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/846412/.
Повний текст джерелаKourouni, Kyriaki. "Translating under time constraints in an undergraduate context: a study of students' products, processes and learning styles." Doctoral thesis, Universitat Rovira i Virgili, 2012. http://hdl.handle.net/10803/84035.
Повний текст джерелаThe present study examines empirically whether learning styles significantly correlate with translation quality when the translation task takes place under increasing time constraints. It strives to link pedagogical practice with professional reality, while promoting synergies between pedagogical practice and empirical translation research. The study gradually builds on the analysis of emerging product- and process-based performance patterns and then highlights pertinent links with the personal variable of learning styles, on the basis of data collected from a total of 84 undergraduates studying translation at the School of English, Aristotle University of Thessaloniki, Greece. Results point to a learning style that correlates significantly with translation quality when working under a relatively relaxed deadline, and to a different one when time constraints increase. Empirical evidence also suggests that participants undergo a state of cognitive “shock” when under increasing time constraints. The conclusions seem to indicate it is worthwhile favoring a learning environment which will take into account students’ different learning styles.
CHEN, JOHAN. "Rationalisation within a healthcare context: Application of the concept Theory of Constraints within a minor healthcare department." Thesis, KTH, Industriell Management, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199205.
Повний текст джерелаDet nuvarande behovet för sjukvård ökar med en allt snabbare takt världen över. Sjukhus och andravårdinstitutioner behöver anpassa sig och göra förändringar för att hantera de demografiska förändringar som sker. Samtidigt så har många sjukhus och vårdcentraler mycket begränsade resurser för att hitta lämpliga lösningar. Ett koncept från tillverkningsindustrin som betraktas som en lämplig lösning för denna situation är ett koncept som heter Theory of Constraints (ToC). Detta koncept fokuserar på att effektivisera processer genom att koordinera de aktiviteter som ingår i en process för att i sin tur säkerställa ett effektivt produktionsflöde. Denna studie har undersökt detta koncepts möjligheter att stödja medicinsk och administrativ personal i arbetet med att försöka minska ledtider i en vårdmiljö.Utredningen har genomförts praktiskt genom en fältstudie på ett av Stockholms största sjukhus. Sjukhuset är ett av de ledande inom svensk medicin och tar emot och behandlar uppemot 300 000 patienter årligen. Fältstudiens utformning bygger på tre metoder, intervjuer, skuggningar och observationer vilket alla är sammankopplade med kvalitativ datainsamling.Resultaten indikerar att tillämpandet av konceptet ToC har påvisat litet förändringsmotstånd av de som har deltagit i förändringsarbetet samt att konceptet har haft förmågan att identifiera och lösa mindre restriktioner inom sjukhusavdelningen för Obstetrik och Gynekologi. Detta har i huvudsak gjorts genom att kartlägga olika aktiviteter med en tydlig orsak och verkan samband. Utöver detta så har konceptet initialt påvisat intressanta framsteg för att eventuellt lösa mer komplexa restriktioner som begränsar produktionsflödet i en sjukhusmiljö. Vidare så framgår det att konceptet ToC i viss utsträckning kompletterar filosofin att arbeta med kontinuerliga förbättringar (Continuous Improvements/CI).Slutsatserna för denna studie har implikationer för både ett teoretiskt och praktiskt perspektiv. Utifrån ett teoretiskt perspektiv, så förser resultaten från studien med ytterligare empiriska data i ett område som för närvarande är uppbyggt av teori och litteratur. Utifrån en praktisk synvinkel ger resultaten för denna studie sjukhus och vårdinstitutioner värdefulla insikter om konceptet ToC, ett potentiellt värdefullt verktyg för att förbättra effektiviteten och minska ledtider samtidigt som det stödjer ett långsiktigt arbete med kontinuerliga förbättringar.
Thapa, Nirmal. "CONTEXT AWARE PRIVACY PRESERVING CLUSTERING AND CLASSIFICATION." UKnowledge, 2013. http://uknowledge.uky.edu/cs_etds/15.
Повний текст джерелаGao, Sijia. "Roadmap enhanced improvement to the VSIMM tracker via a constrained stochastic context free grammar." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61305.
Повний текст джерелаApplied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
Asuncion, Janice Sy. "The Geographic Adaptive Potential of Freight Transportation and Production System in the Context of Fuel and Emission Constraints." Thesis, University of Canterbury. Department of Mechanical Engineering, 2014. http://hdl.handle.net/10092/9230.
Повний текст джерелаDell'Isola, Davide. "Optimization of DC/DC converters for embedded systems including dynamic constraints." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0124.
Повний текст джерелаTo keep up with the new emission standards and improve efficiency and autonomy, the transportation sector has moved towards more electric solutions. Then, compactness, weight and efficiency are primary requirements in modern aircrafts or Electric/Hybrid vehicles. The power electronics units in the on-board electrical networks have to be designed accordingly, as it is essential to achieve very compact designs and energy conversion efficiencies very close to the unity. The wide bandgap semiconductor materials are considered as the future technology in the realization of high efficiency switched-mode power supplies. Such materials are featured by fast switching behaviour and low power losses, which allows reducing the size of the passive elements and the cooling unit of the power converter. Considering these criteria, the objective of this study concerns the development of a procedure for the optimal design of a DC/DC boost converter 350V/3kW. The converter has been designed specifically for a powertrain application. In order to ensure the proper interaction with the load (DC/AC inverter and motor) and the micro-grid on-board, the design must take into account the stability and dynamic behaviour of the converter during a possible variation of the operating point, then its control strategy. To deal with the manifold technical solutions and in order to reach the best trade-off, a Pareto front genetic approach is proposed. The developed routine consent to obtain the most convenient design solutions in terms of efficiency and compactness, which ensure the stability and the compliance with the design specification on both steady state and transients modes
O'Hanlon, Catherine Grace. "Learning in context : linguistic and attentional constraints in the learning of colour and shape terms by three-year-olds." Thesis, University of Essex, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429283.
Повний текст джерелаBorgh, Joakim. "Attribute-Based Encryption in Systems with Resource Constrained Devices in an Information Centric Networking Context." Thesis, Uppsala universitet, Avdelningen för datorteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-298215.
Повний текст джерелаDib, Djawida. "Optimizing PaaS provider profit under service level agreement constraints." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S044/document.
Повний текст джерелаCloud computing is an emerging paradigm revolutionizing the use and marketing of information technology. As the number of cloud users and providers grows, the socio-economical impact of cloud solutions and particularly PaaS (platform as a service) solutions is becoming increasingly critical. The main objective of PaaS providers is to generate the maximum profit from the services they provide. This requires them to face a number of challenges such as efficiently managing the underlying resources and satisfying the SLAs of the hosted applications. This thesis considers a cloud-bursting PaaS environment where the PaaS provider owns a limited number of private resources and is able to rent public cloud resources, when needed. This environment enables the PaaS provider to have full control over services hosted on the private cloud and to take advantage of public clouds for managing peak periods. In this context, we propose a profit-efficient solution for managing the cloud-bursting PaaS system under SLA constraints. We define a profit optimization policy that, after each client request, evaluates the cost of hosting the application using public and private resources and chooses the option that generates the highest profit. During peak periods the optimization policy considers two more options. The first option is to take some resources from running applications, taking into account the payment of penalties if their promised quality of service is affected. The second option is to wait until private resources become available, taking into account the payment of penalties if the promised quality of service of the new application is affected. Furthermore we designed and implemented an open cloud-bursting PaaS system, called Meryn, which integrates the proposed optimization policy and provides support for batch and MapReduce applications. The results of our evaluation show the effectiveness of our approach in optimizing the provider profit. Indeed, compared to a basic approach, our approach provides up to 11.59% and 9.02% more provider profit in, respectively, simulations and experiments
Souleiman, Isman Yahyeh. "Analyse de quelques problèmes de contact glissant." Thesis, Perpignan, 2017. http://www.theses.fr/2017PERP0010/document.
Повний текст джерелаContact phenomena involving deformable bodies abound in industry, especially in mechanical structures. Due to their intrinsic complexity, contact phenomena are modelled with strongly nonlinear boundary problems. For this reason, the modelling of these phenomena gives rise to various mathematical difficulties. In this thesis, we are interested in the modelling, the variational analysis and the numerical analysis of problems of sliding contact in solid mechanics for elastic, viscoelastic and viscoplastic materials. The first part of this thesis concerns some preliminary results, in particular the mathematical and mechanical tools necessary to carry out the continuation of this work. The second part is devoted to the study of some problems of sliding contact under various conditions of contact and friction. For each of these problems, we introduce strong formulations and variational formulations. Then, we obtain results of existence and uniqueness of the weak solutions, under smallness assumptions, as well as results of convergence. Finally, we propose a numerical approximation of some contact problems based on the etudy of discretized schemes. For these schemes we obtain error estimates results
Roney, Joshua. "Evaluating Teaching Grammar in Specific Constraints of Context: A Pilot Study in the Developmental Writing Program at Seminole State College." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5469.
Повний текст джерелаM.A.
Masters
English
Arts and Humanities
English; Rhetoric and Composition
Iqbal, Muhammad Aamir. "Distributed Security Paradigm for Resource-constrained Wireless Sensors in the Context of Internet of Things (IoT)." Thesis, University of Louisiana at Lafayette, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10254391.
Повний текст джерелаThis dissertation addresses new challenges in the Internet of Things (IoT) related to security and privacy. The current transition from legacy internet to Internet of Things leads to multiple changes in its communication paradigms. Today's Machine to Machine (M2M) and Internet of Things architectures further accentuated this trend, not only by involving wider architectures but also by adding heterogeneity, resource capabilities inconstancy, and autonomy to once uniform and deterministic systems and the issue of scalability within a WSN. Unlike internet servers, most of IoT components are characterized by low capabilities in terms of both energy and computing resources and thus, are unable to support complex security schemes. A direct use of existing key establishment protocols to initiate connections between two IoT entities may be impractical unless both endpoints are able to run the required (expensive) cryptographic primitives, thus leaving aside a whole class of resource constrained devices. In this dissertation, we propose novel security solution approaches for key establishments designed to reduce the requirements of existing security protocols in order to be supported by resource-constrained devices and for the scalability of sensors with a WSN in contest of IoT. We have investigated the feasibility of substituting the key management scheme of ZigBee stack by implementing LEAP+ to enhance its security and scalability capabilities in a WSN. LEAP+ is surprisingly well-suited to different types of network topologies, device types, and addressing modes offered by ZigBee stack, resolving the issue of scalability due to ZigBee’s key management centralized approach, and our experimental results and performance evaluation parameters illustrated these facts. We designed new key establishment protocols for the constrained wireless sensors to delegate their heavy cryptographic load to less constrained nodes in their neighborhood, exploiting the spatial heterogeneity of IoT nodes. Allowing cooperation between sensor nodes may open the way to a new class of threats, known as internal attacks, that conventional cryptographic mechanisms fail to deal with. This introduces the concept of trustworthiness within a cooperative group. Proposed protocols aim to track nodes behaviors and past performances to detect their trustworthiness and select reliable ones for cooperative assistance. Sensor nodes’ trustworthiness is verified by accompanying them with an accelerometer to detect whether these cooperative sensors are installed on the same body. Based on an extensive analysis and their accelerometers’ data correlations with the base station (mobile phone in this case) accelerometer data, we identify a set of neighboring devices able to provide assistance in performing heavy asymmetric computations effectively without compromising the security of the whole system. Formal security and privacy verifications and performance analyses with respect to the resource-constrained sensor’s energy are also conducted to ensure the security effectiveness and energy efficiency of our proposed protocols.
Young, Doug. "Caring within constraint : employment relations in voluntary sector social care in the context of personalisation, marketization and austerity." Thesis, University of Strathclyde, 2018. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=30650.
Повний текст джерелаDiallo, Thierno Mahamoudou. "Discovering data quality rules in a master data management context." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0067.
Повний текст джерелаDirty data continues to be an important issue for companies. The datawarehouse institute [Eckerson, 2002], [Rockwell, 2012] stated poor data costs US businesses $611 billion dollars annually and erroneously priced data in retail databases costs US customers $2.5 billion each year. Data quality becomes more and more critical. The database community pays a particular attention to this subject where a variety of integrity constraints like Conditional Functional Dependencies (CFD) have been studied for data cleaning. Repair techniques based on these constraints are precise to catch inconsistencies but are limited on how to exactly correct data. Master data brings a new alternative for data cleaning with respect to it quality property. Thanks to the growing importance of Master Data Management (MDM), a new class of data quality rule known as Editing Rules (ER) tells how to fix errors, pointing which attributes are wrong and what values they should take. The intuition is to correct dirty data using high quality data from the master. However, finding data quality rules is an expensive process that involves intensive manual efforts. It remains unrealistic to rely on human designers. In this thesis, we develop pattern mining techniques for discovering ER from existing source relations with respect to master relations. In this set- ting, we propose a new semantics of ER taking advantage of both source and master data. Thanks to the semantics proposed in term of satisfaction, the discovery problem of ER turns out to be strongly related to the discovery of both CFD and one-to-one correspondences between sources and target attributes. We first attack the problem of discovering CFD. We concentrate our attention to the particular class of constant CFD known as very expressive to detect inconsistencies. We extend some well know concepts introduced for traditional Functional Dependencies to solve the discovery problem of CFD. Secondly, we propose a method based on INclusion Dependencies to extract one-to-one correspondences from source to master attributes before automatically building ER. Finally we propose some heuristics of applying ER to clean data. We have implemented and evaluated our techniques on both real life and synthetic databases. Experiments show both the feasibility, the scalability and the robustness of our proposal