Dissertations / Theses: 'The Hidden Dimension'

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Psaila, Claudia. "Spirituality in psychotherapy : a hidden dimension : an exploratory study." Thesis, Open University, 2012. http://oro.open.ac.uk/54516/.

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Many in the caring professions consider spirituality to be a fundamental dimension of human experience and identity. Consequently, some claim that this dimension cannot be ignored in disciplines such as psychotherapy that deals with the human being and with human experience. Moreover, the increase in secularisation and the emphasis on the subjective and the personal in people's experience of spirituality and religion, have led to an increased interest in psychotherapy, counselling and other forms of activities and professions that deal more closely with the personal and subjective. Other themes that connect spirituality and psychotherapy include: spirituality is related to a person's mental health; people make meaning which assumes that they are spiritual beings; and spirituality and psychotherapy both involve enlightenment and meaning-making. For some, spirituality is manifest in psychotherapy either because of spiritual concerns that are raised by clients in the psychotherapeutic process, as a resource, or as a form of pathology. For others, therapy is a spiritual encounter. The research is a qualitative exploratory study of the experience and perception of the spiritual dimension of psychotherapy of Maltese practitioners. The study was held with two groups of Maltese psychotherapists and clinical and counselling psychologists. Each group attended a series of four focus/study group sessions. Key areas explored include the participants' conception of spirituality and religion and their understanding and experience of the spiritual dimension in counselling and psychotherapy. Broadly, the study focused on the ways in which spirituality may become manifest' and express itself in the psychotherapeutic process, the roles and experiences of the therapist and the client regarding spirituality in counselling and psychotherapy and the identification of the factors that may contribute to the spiritual dimension of counselling and psychotherapy. The findings are presented as two main domains, that of 'understanding spirituality and religion in a postmodern context' and 'spirituality and psychotherapy'. The latter is divided into four themes that are facets of the domain 'spirituality and psychotherapy'. These are a) understanding spirituality and religion, b) the therapeutic relationship as sacred space, c) the being: it is who the therapist is that counts and d) applications in clinical practice. The findings are discussed in relation to the literature and to the Maltese context.

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Whitfield, Paul Michael. "The hidden dimension of strategic planning: explorations in the formation of perspectives." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/27079.

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Perspectives are an extremely important factor in political decisions. The study of decision-making is often approached in a segmented manner with social scientists each believing their discipline is the correct approach. This thesis asserts that the study of decision-making must focus on how perspectives are formed and be interdisciplinary. Each discipline should be incorporated to discover how various factors influence the decision-making process. Perspectives are often confused with beliefs or ideas. This thesis defines perspectives as a subjective approach to an objective reality. A large portion of various sections in the thesis is devoted to examining concepts of subjective reality. It explores some of the possible interrelationships of perceptual influences with the intent of better understanding the decision-making process. The thesis presents several models which help explain the processes involved in forming perspectives and making decisions.

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Löhr, Wolfgang. "Models of Discrete-Time Stochastic Processes and Associated Complexity Measures." Doctoral thesis, Universitätsbibliothek Leipzig, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-38267.

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Many complexity measures are defined as the size of a minimal representation in a specific model class. One such complexity measure, which is important because it is widely applied, is statistical complexity. It is defined for discrete-time, stationary stochastic processes within a theory called computational mechanics. Here, a mathematically rigorous, more general version of this theory is presented, and abstract properties of statistical complexity as a function on the space of processes are investigated. In particular, weak-* lower semi-continuity and concavity are shown, and it is argued that these properties should be shared by all sensible complexity measures. Furthermore, a formula for the ergodic decomposition is obtained. The same results are also proven for two other complexity measures that are defined by different model classes, namely process dimension and generative complexity. These two quantities, and also the information theoretic complexity measure called excess entropy, are related to statistical complexity, and this relation is discussed here. It is also shown that computational mechanics can be reformulated in terms of Frank Knight's prediction process, which is of both conceptual and technical interest. In particular, it allows for a unified treatment of different processes and facilitates topological considerations. Continuity of the Markov transition kernel of a discrete version of the prediction process is obtained as a new result.

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Madureira, Fillipe Levi Guedes. "Estudo dimensional de características aplicadas à leitura labial automática." Pós-Graduação em Engenharia Elétrica, 2018. http://ri.ufs.br/jspui/handle/riufs/9567.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
This work is a study of the relationship between the intrinsic dimension of feature vectors applied to the classification of video signals in order to perform lip reading. In pattern recognition tasks, the extraction of relevant features is crucial for a good performance of the classifiers. The starting point of this work was the reproduction of the work of J.R. Movellan [1], which classifies lips gestures with HMM using only the video signal from the Tulips1 database. The database consists of videos of volunteers’ mouths while they utter the first 4 numerals in English. The original work uses feature vectors of high dimensionality in relation to the size of the database. Consequently, the adjustment of HMM classifiers has become problematic and the maximum accuracy was only 66.67%. Alternative strategies for feature extraction and classification schemes were proposed in order to analyze the influence of the intrinsic dimension in the performance of classifiers. The best solution, in terms of results, achieved an accuracy of approximately 83%.
Este trabalho é um estudo da relação entre a dimensão intrínseca de vetores de características aplicados à classificação de sinais de vídeo no intuito de realizar-se a leitura labial. Nas tarefas de reconhecimento de padrões, a extração de características relevantes é crucial para um bom desempenho dos classificadores. O ponto de partida deste trabalho foi a reprodução do trabalho de J.R. Movellan [1], que realiza a classificação de gestos labiais com HMM na base de dados Tulips1, utilizando somente o sinal de vídeo. A base é composta por vídeos das bocas de voluntários enquanto esses pronunciam os primeiros 4 numerais em inglês. O trabalho original utiliza vetores de características de dimensão muito alta em relação ao tamanho da base. Consequentemente, o ajuste de classificadores HMM se tornou problemático e só se alcançou 66,67% de acurácia. Estratégias de extração de características e esquemas de classificação alternativos foram propostos, a fim de analisar a influência da dimensão intrínseca no desempenho de classificadores. A melhor solução, em termos de resultados, obteve uma acurácia de aproximadamente 83%.
São Cristóvão, SE

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Ulusoy, Cisil, and Ajda Alev. "Leading smoothly: hidden dimensions of leadership." Thesis, Linnéuniversitetet, Ekonomihögskolan, ELNU, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-12598.

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This research aims to understand, describe and analyze the hidden dimensions of leadership that can nourish leader-follower relationships. Additionally, by analyzing empirical illustrations combined with the theories presented in the literature, we have developed a framework for leading smoothly, which can provide insights into the leadership activities that leaders and executives can benefit from. Our findings on leading smoothly emerged during our analysis and interpretation of two case studies and our literature review, and led us to concentrate on emotional and communicational dimensions of leadership. Concerning crisis and turbulent times as one of the most challenging situations for performing leadership activities, we present two case studies related to leadership approaches during crises. One of the case studies is about the leadership of BP‟s former CEO Tony Hayward during the oil spill crisis in the Gulf of Mexico in 2010, and the second case is about the leadership of the former CEO of Johnson & Johnson during the Tylenol crisis in 1982. While analyzing the cases, the emotional and communicational approaches of leaders are examined. Furthermore, these case studies facilitate the identification of the aspects that smooth leadership activities and their impacts on the leader follower relationships. Consequently, the study discusses the emotional and communicational dimensions of leadership and presents the framework for leading smoothly as a different perspective for embellishing the interaction between the leader and the follower, which can provide an understanding of the subtle ways of leading.

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Santiago-GermaÌn, Wenceslao. "Space-time structure and hidden dimensions." Thesis, University of Newcastle Upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289215.

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Jafarian, Javad. "Modelling and analysis of wireless MAC protocols with applications to vehicular networks." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/modelling-and-analysis-of-wireless-mac-protocols-with-applications-to-vehicular-networks(3695e637-12eb-4fde-9c31-08b3b46e8f55).html.

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The popularity of the wireless networks is so great that we will soon reach the point where most of the devices work based on that, but new challenges in wireless channel access will be created with these increasingly widespread wireless communications. Multi-channel CSMA protocols have been designed to enhance the throughput of the next generation wireless networks compared to single-channel protocols. However, their performance analysis still needs careful considerations. In this thesis, a set of techniques are proposed to model and analyse the CSMA protocols in terms of channel sensing and channel access. In that respect, the performance analysis of un-slotted multi-channel CSMA protocols is studied through considering the hidden terminals. In the modelling phase, important parameters such as shadowing and path loss impairments are being considered. Following that, due to the high importance of spectrum sensing in CSMA protocols, the Double-Threshold Energy Detector (DTED) is thoroughly investigated in this thesis. An iterative algorithm is also proposed to determine optimum values of detection parameters in a sensing-throughput problem formulation. Vehicle-to-Roadside (V2R) communication, as a part of Intelligent Transportation System (ITS), over multi-channel wireless networks is also modelled and analysed in this thesis. In this respect, through proposing a novel mathematical model, the connectivity level which an arbitrary vehicle experiences during its packet transmission with a RSU is also investigated.

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Löhr, Wolfgang. "Models of Discrete-Time Stochastic Processes and Associated Complexity Measures." Doctoral thesis, Max Planck Institut für Mathematik in den Naturwissenschaften, 2009. https://ul.qucosa.de/id/qucosa%3A11017.

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Many complexity measures are defined as the size of a minimal representation in a specific model class. One such complexity measure, which is important because it is widely applied, is statistical complexity. It is defined for discrete-time, stationary stochastic processes within a theory called computational mechanics. Here, a mathematically rigorous, more general version of this theory is presented, and abstract properties of statistical complexity as a function on the space of processes are investigated. In particular, weak-* lower semi-continuity and concavity are shown, and it is argued that these properties should be shared by all sensible complexity measures. Furthermore, a formula for the ergodic decomposition is obtained. The same results are also proven for two other complexity measures that are defined by different model classes, namely process dimension and generative complexity. These two quantities, and also the information theoretic complexity measure called excess entropy, are related to statistical complexity, and this relation is discussed here. It is also shown that computational mechanics can be reformulated in terms of Frank Knight''s prediction process, which is of both conceptual and technical interest. In particular, it allows for a unified treatment of different processes and facilitates topological considerations. Continuity of the Markov transition kernel of a discrete version of the prediction process is obtained as a new result.

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9

Davis, P. "Hidden symmetries of higher dimensional black holes." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598390.

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This thesis is concerned with symmetries of higher dimensional black holes beyond the usual isometries of the spacetime. Such symmetries give rise to extra constants of the motion that allow the geodesic and Klein-Gordon equations to be separated. We show that the singly charged, five-dimensional Kerr-AdS black hole of minimal gauged supergravity with arbitrary rotating parameters admits separable solutions to the Hamilton-Jacobi and Klein-Gordon equations. This is due to the existence of an irreducible rank-2 Killing tensor which we find. We also show that the Dirac equation separates in the case where the rotation parameters are equal, and we also examine the near horizon geometry of the supersymmetric limit of this black hole, showing that the symmetry algebra takes the expected form. By considering multiply charged, rotating black hole solutions to gauged and ungauged supergravity in 4, 5 and 7 dimensions, we find that, in general, the Hamilton-Jacobi and Klein-Gordon equations can only be separated in the case where the particle under consideration is massless. In this case, we find conformal Killing tensors which obey an equation involving a co-vector field. We find this co-vector field in several cases and use it to conjecture its general form. We prove this conjecture under reasonable assumptions. We also prove that cohomeneity-2 Kerr-AdS black holes generalised to include a NUT-like parameter admit separable solutions to the Hamilton-Jacobi and Klein-Gordon equations in all dimensions, by finding the Killing tensors and examining the symmetry algebra.

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Gustafsson, Michael. "Light from Dark Matter : Hidden Dimensions, Supersymmetry, and Inert Higgs." Doctoral thesis, Stockholm : Department of Physics, Stockholm university, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7345.

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Bloom, Jesse D. Mayo Stephen L. Arnold Frances. "Hidden dimensions in protein evolution : stability, mutational robustness, and evolvability /." Diss., Pasadena, Calif. : California Institute of Technology, 2007. http://resolver.caltech.edu/CaltechETD:etd-05232007-094635.

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Chamsine, Rania. "Lashes to Ashes, Exploring the Hidden Dimensions of Human Hair." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3144.

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Hair is power, beauty and seduction: a reflection of ethnicity and religion, and even a canvas for self-expression. A key feature in defining identity and social status, it holds the essence of our individuality. However, once removed from its original and natural setting—the epidermis—hair is seen as waste, and often evokes disgust. The objective of this thesis is to explore human hair, which particularly in the Arabic-Islamic region, carries great significance and raises many religious, cultural, and gender issues. Through design, and informed by critical design theory, I explore how this corporeal material can be reused and re-presented as a means of interrogating the references, symbolism, and connotations of hair both in, and out of, its natural setting.

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Dickinson, Benjamin David. "Characterizing a Hidden Fishery: Setline Fishing in the New River, Virginia." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/24765.

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Catfishes Ictaluridae are important food fish that are harvested from the New River, Virginia by multiple methods, yet standard creel survey approaches do not accurately sample setline effort, a popular fishing gear for catfish. I characterized the New River setline fishery by estimating setline effort and catch rates of catfish and by-catch in 2011, and by investigating the attitudes and opinions of setline users during 2012. Setline effort was highest during June-August, and declined significantly by mid-September. Several dedicated setline users accounted for a significant portion of total setline effort. Experimental setlines baited with live minnows Cyprinidae proved to be an effective method for catching catfish but caught few walleye Sander vitreus, smallmouth bass Micropterus dolomieu, and muskellunge Esox masquinongy. Estimated by-catch of these species by setline fishers is small compared to catch by hook-and-line anglers, though walleye experienced high setline hooking mortality, and catch rates increased in autumn months. Setlines appear to be part of a larger "way of life" for some rural individuals, who may also hunt, trap, and garden as part of activities to supplement their diet or income. New River setline fishers strongly believe that setline fishing has declined significantly in the New River Valley due to improving socioeconomic status of the region, changing recreational values (such as focus on catch-and-release fishing and paddle sports), increasing recreational traffic and law enforcement presence, and decreasing participation in setline fishing by younger generation.
Master of Science

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Jamsin, Ella. "Hidden symmetries and black holes in supergravity." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210133.

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Upon dimensional reduction, certain supergravity theories exhibit symmetries otherwise undetected, called hidden symmetries. Not only do these symmetries teach us about the structure of the corresponding theories but moreover they provide methods to construct black hole solutions.

In this thesis, we study the hidden symmetries of supergravity theories of particular interest and how these help constructing black hole solutions in dimensions D>4. We focus on three representative cases that are the symmetries appearing upon dimensional reduction to three, two and one dimensions. They are respectively described by finite, affine and hyperbolic algebras. In the first two cases, we develop and apply solution generating techniques.

The first part of this thesis introduces the background concepts. We start with an introduction to black holes and other black objects in dimensions D>4. We present their subtleties, the known solutions and the conjectured ones. We insist on stationary axisymmetric solutions of vacuum and to the corresponding solution generating technique.

The next chapter gives an introduction to Kac-Moody algebras. These indeed play a central role in this thesis as the symmetries appearing in three, two and one dimensions are described by three types of Kac-Moody algebras called respectively finite, affine and hyperbolic.

In the second part, we first review the notion of dimensional reductions and how the hidden symmetries can be uncovered. The rest of the thesis contains three applications of these hidden symmetries.

The first two concern five-dimensional minimal supergravity. Upon dimensional reduction to three dimensions, this theory exhibits a symmetry under the exceptional finite Kac-Moody algebra g2. This 14-dimensional algebra is the smallest exceptional finite Kac-Moody algebra. We use this duality to generate solutions while focussing mainly on black strings.

After reduction to two dimensions, the symmetry becomes infinite-dimensional and is described by the affine extension of g2. Moreover, the two-dimensional theory is integrable, which allows us to develop another type of solution generating technique, hitherto applied only to vacuum gravity. In this work we generalize it to a case with matter fields.

Finally, the notion of dimensional reduction to one dimension provides the necessary intuition for the conjecture of an algebraic formulation of M-theory, candidate to the unification of all interactions, based on the hyperbolic Kac-Moody algebra e10. In the last chapter of this thesis, we study an aspect of this correspondence, namely the e10 symmetry of massive type IIA supergravity in ten dimensions.

/

On sait depuis longtemps que par un processus appelé réduction dimensionnelle, on peut faire apparaître dans certaines théories de gravitation des symétries autrement indétectées. On les appelle des symétries cachées. La mise en évidence de ces symétries non seulement nous informe sur la structure de ces théories, mais de plus elle permet d'élaborer des méthodes de construction de solutions de trous noirs.

Dans cette thèse, nous étudions les symétries cachées de certaines théories de supergravité en dimensions supérieures à quatre. Nous nous concentrons sur trois cas représentatifs que sont les symétries apparaissant après réduction à trois, deux et une dimensions. Dans les cas des symétries apparaissant à trois et à deux dimensions nous développons et appliquons des méthodes de construction de solutions.

La première partie introduit les concepts préliminaires. Nous commençons par une introduction aux trous noirs et autres objets noirs en dimensions supérieures à quatre. Nous en présentons les subtilités, les solutions connues à ce jour et celles qui ne sont encore que conjecturées. Nous insistons particulièrement sur les solutions stationnaires à symétrie axiale dans le vide et à la méthode de construction de solutions correspondante.

Le chapitre suivant présente une introduction aux algèbres de Kac-Moody. Celles-ci jouent en effet un rôle central dans cette thèse puisque les symétries apparaissant à trois, deux et une dimensions sont décrites par trois types d'algèbres de Kac-Moody appelées respectivement finies, affines et hyperboliques.

Dans la deuxième partie, nous rentrons dans le vif du sujet, en commençant par rappeler le principe des réductions dimensionnelles et la mise en évidence des différents types de symétries cachées. Les trois derniers chapitres contiennent ensuite trois applications de ces symétries cachées.

Dans deux d'entre eux, nous nous concentrons sur la théorie de supergravité minimale à cinq dimensions. Après réduction à trois dimensions, cette théorie présente un symétrie cachée sous le groupe G2 qui, avec quatorze dimensions, est le plus petit des groupes de Lie exceptionnels. Nous utilisons cette dualité pour engendrer des solutions, en nous focalisant essentiellement sur les solutions de cordes noires.

A deux dimensions, la symétrie est décrite par l'extension affine de G2. De plus, la théorie est alors complètement intégrable. Cela conduit à un autre type de méthode de construction de solutions, jusqu'alors uniquement appliquée à des théories dans le vide. Dans ce travail, nous la généralisons donc à un cas avec champs de matière.

Enfin, la notion de réduction à une dimension fournit l'intuition d'une conjecture selon laquelle la théorie M, candidate à l'unification de toutes les interactions, pourrait être reformulée en une théorie basée sur l'algèbre de Kac-Moody hyperbolique e10. Dans le dernier chapitre de cette thèse, nous étudions un aspect de cette correspondance, à savoir, la symétrie sous e10 de la supergravité massive de type IIA à dix dimensions.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished

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Tiphine, Lucas. ""L'événement proxémique" : étude des relations de circulation entre piétons aux heures de pointe à Delhi, Los Angeles, Paris et Tokyo." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEN009/document.

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Dans un contexte de saturation des réseaux de circulation liée à l'accélération de l'urbanisation, le but de cette recherche est d’alimenter le débat scienti8ique sur les réponses à apporter à cet enjeu social par l’étude des comportements de régulation des distances physiques entre les piétons dans les lieux publics. La composante urbaine de la théorie de la proxémie d'Edward T. Hall est prise comme inspiration liminaire. Celle-ci soutient qu'il existe une corrélation entre l'organisation de l'espace macro de la Société et celui micro des comportements individuels. Elle conduit Hall à une distinction entre « cultures du contact » et du « non – contact », les premières préférant une plus grande proximité physique entre les corps. Toutefois, la différenciation des aires culturelles de Hall (par exemple : « monde arabe »= « culture du contact ») n'apparaît plus pertinente à l'ère de la mondialisation urbaine.Une nouvelle théorie « micromacro », fondée sur 4 macro-orientations susceptibles d'avoir une influence sur les comportements, est alors proposée : égalité entre citadins, individualisation, urbanité relative et régulation de l'urbanisme. Deux autres appréciations de l’existence d’une corrélation scalaire entre des niveaux de description des relations spatiales sont également testées. L'une, appelée « micromeso », s’inspire de la théorie des « sites comportementaux » de Roger Barker. Elle considère que les comportements proxémiques sont corrélés avec des unités intermédiaires définies par un lieu et une heure spécifiques telles que «le métro à l'heure de pointe». L'autre théorie,appelée « micro », affirme que toute forme de corrélation scalaire est une erreur écologique.Delhi, Los Angeles, Paris et Tokyo, qui répondent différemment aux macro-orientations de la théorie micromacro sont prises comme terrains d’étude. Les comportements à l'intérieur et à l'extérieur du métro de chacune de ces aires métropolitaines sont observés (théorie micromeso). Dans ces deux conditions, des niveaux similaires d’enjeu spatial sont étudiés (théorie micro). Les résultats amènent à conclure que les relations de circulation sont mieux décrites par ordre d'efficacité lorsqu'on les considère cumulativement comme micro > micromeso >micromacro. Je défends alors la thèse selon laquelle les sociétés devraient débattre des améliorations des microconditions des relations de circulation plutôt que de se concentrer sur les explications micromacro et micromeso des dysfonctionnements de celles-ci, qui peuvent par exemple être identifiées dans la mise en compétition des individus autour du thème de la civilité
In a context of traf8ic networks saturation related to urbanisation acceleration, thisresearch is aimed at contributing to the scienti8ic debate on this issue by building a model to describe dynamic pedestrians’ physical distances regulation behaviours in public places.The urban dimension of Edward T. Hall’s theory of proxemics is taken as an initial inspiration. This author argues that a correlation exists between the organisation of space at the macro level of Society and the micro level of individual behaviours. It leads him to a synthetic distinction between ‘contact cultures’ and ‘non-contact cultures’. The former tends to prefer smaller distances at all scales of space organisation compared to the latter.This hypothesis is considered seriously in the research. Nonetheless, Hall’s macroculturalist anthropological area distinction (e.g.: the ‘Arab World’ = ‘contact culture’) isnot relevant anymore in the urban globalization era. Therefore, a new ‘micromacro’theory, based on 4 macro orientations expected to have an influence on micro behaviours,is proposed: equality between urban citizens, individualisation, relative urbanity and urban planning regulation.Two other scalar correlation theories of spatial relations description are also tested. One,called ‘micromeso’, is based on Roger Barker’s behaviour setting theory. It states thatproxemical behaviours are correlated with intermediate units related to a specific placeand time such as ‘the subway at peak hours’. The other theory, called ‘micro’, states thatany form of scalar correlation is an ecological fallacy. Accordingly, the description processhas to remain at the very level of physical distance relations between individuals.These different theories are tested empirically in Delhi, Los Angeles, Paris and Tokyowhich all answer differently to the macro orientations of the micromacro theory. Behaviours inside the metro and outside of it are observed (micromeso theory). In each condition, similar levels of spatial competition for places are taken into consideration (micro theory).The results lead to conclude that traffic relations between pedestrians are best describedwhen considered cumulatively as micro > micromeso > micromacro by order of efficiency. Eventually, I defend the thesis that urban dwellers should debate of traffic relationshipsmicro conditions improvements rather than focusing on micromacro and micromeso explanations of the networks breakdowns which can be found for instance in the competition promoted between individuals on civil behaviours

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Behravan, Bita [Verfasser], and Gisela [Akademischer Betreuer] Steins. "The hidden psycho-social dimensions of cosmetic surgery / Bita Behravan ; Betreuer: Gisela Steins." Duisburg, 2018. http://d-nb.info/1164376365/34.

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Roy, Sabyasachi. "Constraints on a minimal hidden photon with Kaluza-Klein excitations in large extra dimensions." Thesis, Durham University, 2013. http://etheses.dur.ac.uk/6386/.

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The major purpose of this work is to combine the minimal-hidden-photon model with Large Extra Dimensions (LED). This involves confining the Standard- Model photon to a 3-brane, whilst allowing the hidden photon and graviton to occupy the higher-dimensional bulk. After integrating out the extra dimensions both the hidden photon and graviton obtain a tower of massive Kaluza-Klein (KK) modes. The Standard-Model photon obtains no KK modes, in accordance with experiment. The work begins with a discussion of the minimal hidden photon with- out KK modes, including the current constraints. In most cases existing con- straints are simply quoted or rederived, but for some experiments original con- straints are produced. For example new constraints from atomic spectra are produced. Significant modifications are also made to the published constraint from the SN1987a energy-loss experiment. This means properly accounting for the plasma mass of the electron, and also accounting for the modification of the kinetic-mixing parameter in a plasma. Finally constraints are produced for the minimal-hidden-photon model with KK modes.

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Warraich, Daud Sana Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Ultrasonic stochastic localization of hidden discontinuities in composites using multimodal probability beliefs." Publisher:University of New South Wales. Mechanical & Manufacturing Engineering, 2009. http://handle.unsw.edu.au/1959.4/43719.

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This thesis presents a technique used to stochastically estimate the location of hidden discontinuities in carbon fiber composite materials. Composites pose a challenge to signal processing because speckle noise, as a result of reflections from impregnated laminas, masks useful information and impedes detection of hidden discontinuities. Although digital signal processing techniques have been exploited to lessen speckle noise and help to localize discontinuities, uncertainty in ultrasonic wave propagation and broadband frequency based inspections of composites still make it a difficult task. The technique proposed in this thesis estimates the location of hidden discontinuities stochastically in one- and two-dimensions based on statistical data of A-Scans and C-Scans. Multiple experiments have been performed on carbon fiber reinforced plastics including artificial delaminations and porosity at different depths in the thickness of material. A probabilistic approach, which precisely localizes discontinuities in high and low amplitude signals, has been used to present this method. Compared to conventional techniques the proposed technique offers a more reliable package, with the ability to detect discontinuities in signals with lower intensities by utilizing the repetitive amplitudes in multiple sensor observations obtained from one-dimensional A-Scans or two-dimensional C-Scan data sets. The thesis presents the methodology encompassing the proposed technique and the implementation of a system to process real ultrasonic signals and images for effective discontinuity detection and localization.

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Giangreco, Marotta Puletti Valentina. "On string integrability a journey through the two-dimensional hidden symmetries in the AdS/CFT dualities /." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-107326.

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Othman, Hisham H. A. "A novel reduced-complexity approach to hidden Markov modeling of two-dimensional processes with application to face recognition." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6162.

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The 2-D Hidden Markov Model (HMM) is an extension of the traditional 1-D HMM that has shown distinctive efficiency in modeling 1-D signals. Unlike 1-D HMMs, 2-D HMMs are known for their prohibitively high complexity. This encouraged many researchers to work on alternatives such as Pseudo 2-D HMM and Embedded HMM for 2-D recognition applications to avoid the complexity problem. Those applications include, but are not limited to, Face Recognition, Optical Character Recognition, Face Detection, Image Retrieval, and Object Recognition. The Hidden Layer's complexity of a typical second-order 2-D HMM is normally in the order of (N3). The term "Hidden Layer" refers to the computations of the probabilities of state transition and N is the number of states in the model. In this thesis, a low complexity high performance 2-D Hidden Markov Model (HMM) is proposed and is applied to the problem of Face Recognition. The proposed model is a true 2-D HMM. The complexity of the Hidden Layer is brought down to the order of (2N2) using a basic assumption of conditional independence between vertical and horizontal state transitions. This assumption allows replacing the 3-D state transition matrix with two 2-D transition matrices. HMM complexity is always addressed in the literature from the Hidden Layer perspective, yet the complexity of the observation layer is not trivial. The mixtures of the proposed model are tied for lower observation layer complexity. The performance and the complexity of the proposed model with tied mixtures are investigated while applied to the problem of face recognition. The proposed face recognition system achieves recognition rates up to 100% on the AT&T facial database with complexity that is comparable to that of 1-D HMM.

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Nettelblad, Carl. "Two Optimization Problems in Genetics : Multi-dimensional QTL Analysis and Haplotype Inference." Doctoral thesis, Uppsala universitet, Avdelningen för beräkningsvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-180920.

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The existence of new technologies, implemented in efficient platforms and workflows has made massive genotyping available to all fields of biology and medicine. Genetic analyses are no longer dominated by experimental work in laboratories, but rather the interpretation of the resulting data. When billions of data points representing thousands of individuals are available, efficient computational tools are required. The focus of this thesis is on developing models, methods and implementations for such tools. The first theme of the thesis is multi-dimensional scans for quantitative trait loci (QTL) in experimental crosses. By mating individuals from different lines, it is possible to gather data that can be used to pinpoint the genetic variation that influences specific traits to specific genome loci. However, it is natural to expect multiple genes influencing a single trait to interact. The thesis discusses model structure and model selection, giving new insight regarding under what conditions orthogonal models can be devised. The thesis also presents a new optimization method for efficiently and accurately locating QTL, and performing the permuted data searches needed for significance testing. This method has been implemented in a software package that can seamlessly perform the searches on grid computing infrastructures. The other theme in the thesis is the development of adapted optimization schemes for using hidden Markov models in tracing allele inheritance pathways, and specifically inferring haplotypes. The advances presented form the basis for more accurate and non-biased line origin probabilities in experimental crosses, especially multi-generational ones. We show that the new tools are able to reconstruct haplotypes and even genotypes in founder individuals and offspring alike, based on only unordered offspring genotypes. The tools can also handle larger populations than competing methods, resolving inheritance pathways and phase in much larger and more complex populations. Finally, the methods presented are also applicable to datasets where individual relationships are not known, which is frequently the case in human genetics studies. One immediate application for this would be improved accuracy for imputation of SNP markers within genome-wide association studies (GWAS).
eSSENCE

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Kheroufi-Andriot, Olivier. "Analyse de l'activité d'accompagnement dans le contexte de l'inclusion scolaire française. Perspectives pour l'organisation d'un collectif inclusif et la formation des enseignants." Thesis, Lille 3, 2020. http://www.theses.fr/2020LIL3H021.

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L’objectif de notre recherche doctorale est de questionner la construction d’un travail collectif entre acteurs scolaires et non scolaires en vue de mieux comprendre la forme d’organisation que peut prendre un collectif dans un contexte, celui de l’inclusion scolaire française. Un travail collectif est prescrit par l’institution scolaire, mais l’activité n’est jamais simple exécution. L’intérêt est ainsi d’interroger la forme d’organisation du collectif à partir de l’analyse de l’activité de travail d’accompagnement d’enseignants et d’accompagnants, appelée activité d’accompagnement. Un espace de construction épistémologique qui combine l’analyse pluridisciplinaire des situations de travail, la clinique de l’activité et l’ergonomie est construit pour cela, et il prend appui sur le concept de normativité. Cinq situations d’inclusion d’enfants et d’adolescents en situation de handicap qui se réalisent aux différents degrés de l’enseignement français sont analysées, et nous considérons chacune de ces cinq situations d’inclusion comme une étude de cas. Nous investiguons au cours de notre enquête de terrain, par la construction d’un cadre méthodologique original, leur manière de construire collectivement une inclusion dans un contexte toujours singulier, celui de la classe et de l’établissement scolaire. L’enjeu est d’identifier un possible organisateur de leur activité d’accompagnement qui leur permet de faire du collectif une ressource pour construire une inclusion efficace de leur point de vue. Les résultats de notre recherche contribuent à mieux appréhender l’activité d’accompagnement des enseignants et des accompagnants, et en particulier les dimensions cachées de leur activité. Cette connaissance produite est ensuite utilisée pour (re)penser l’organisation d’un collectif inclusif et la formation des enseignants en matière d’inclusion
The objective of our doctoral research is to question the construction of collective work between school and non-school actors in order to better understand the form of organization that a collective can take in a context, that of French school inclusion. Collective work is prescribed by the educational institution, but the activity is never simple execution. The interest is thus to question the form of organization of the collective from the analysis of the accompanying work activity of teachers and support staff, called support work. An epistemological construction space which combines the multidisciplinary analysis of work situations, the clinic of activity and ergonomics is built for this, and it is based on the concept of normativity. Five situations of inclusion of children and adolescents with disabilities that occur at different levels of French education are analyzed, and we consider each of these five situations of inclusion as a case study. We are investigating during our field investigation, by building an original methodological framework, their way of collectively building an inclusion in a context that is always unique, that of the class and the school establishment. The challenge is to identify a possible organizer of their support activity which allows them to make the collective a resource to build effective inclusion from their point of view. The results of our research help to better understand the support activity of teachers and support staff, and in particular the hidden dimensions of their activity. This knowledge is then used to (re) think about organizing an inclusive collective and training teachers in inclusion

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Trethewey, Sally Olin. "Effects of computer based two and three dimensional visualization training for male and female engineering graphics students with low, middle, and high levels of visualization skill as measured by mental rotation and hidden figures tasks." Connect to resource, 1990. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1228748592.

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Sekhi, Ikram. "Développement d'un alphabet structural intégrant la flexibilité des structures protéiques." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCC084/document.

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L’objectif de cette thèse est de proposer un Alphabet Structural (AS) permettant une caractérisation fine et précise des structures tridimensionnelles (3D) des protéines, à l’aide des chaînes de Markov cachées (HMM) qui permettent de prendre en compte la logique issue de l’enchaînement des fragments structuraux en intégrant l’augmentation des conformations 3D des structures protéiques désormais disponibles dans la banque de données de la Protein Data Bank (PDB). Nous proposons dans cette thèse un nouvel alphabet, améliorant l’alphabet structural HMM-SA27,appelé SAFlex (Structural Alphabet Flexibility), dans le but de prendre en compte l’incertitude des données (données manquantes dans les fichiers PDB) et la redondance des structures protéiques. Le nouvel alphabet structural SAFlex obtenu propose donc un nouveau modèle d’encodage rigoureux et robuste. Cet encodage permet de prendre en compte l’incertitude des données en proposant trois options d’encodages : le Maximum a posteriori (MAP), la distribution marginale a posteriori (POST)et le nombre effectif de lettres à chaque position donnée (NEFF). SAFlex fournit également un encodage consensus à partir de différentes réplications (chaînes multiples, monomères et homomères) d’une même protéine. Il permet ainsi la détection de la variabilité structurale entre celles-ci. Les avancées méthodologiques ainsi que l’obtention de l’alphabet SAFlex constituent les contributions principales de ce travail de thèse. Nous présentons aussi le nouveau parser de la PDB (SAFlex-PDB) et nous démontrons que notre parser a un intérêt aussi bien sur le plan qualitatif (détection de diverses erreurs)que quantitatif (rapidité et parallélisation) en le comparant avec deux autres parsers très connus dans le domaine (Biopython et BioJava). Nous proposons également à la communauté scientifique un site web mettant en ligne ce nouvel alphabet structural SAFlex. Ce site web représente la contribution concrète de cette thèse alors que le parser SAFlex-PDB représente une contribution importante pour le fonctionnement du site web proposé. Cette caractérisation précise des conformations 3D et la prise en compte de la redondance des informations 3D disponibles, fournies par SAFlex, a en effet un impact très important pour la modélisation de la conformation et de la variabilité des structures 3D, des boucles protéiques et des régions d’interface avec différents partenaires, impliqués dans la fonction des protéines
The purpose of this PhD is to provide a Structural Alphabet (SA) for more accurate characterization of protein three-dimensional (3D) structures as well as integrating the increasing protein 3D structure information currently available in the Protein Data Bank (PDB). The SA also takes into consideration the logic behind the structural fragments sequence by using the hidden Markov Model (HMM). In this PhD, we describe a new structural alphabet, improving the existing HMM-SA27 structural alphabet, called SAFlex (Structural Alphabet Flexibility), in order to take into account the uncertainty of data (missing data in PDB files) and the redundancy of protein structures. The new SAFlex structural alphabet obtained therefore offers a new, rigorous and robust encoding model. This encoding takes into account the encoding uncertainty by providing three encoding options: the maximum a posteriori (MAP), the marginal posterior distribution (POST), and the effective number of letters at each given position (NEFF). SAFlex also provides and builds a consensus encoding from different replicates (multiple chains, monomers and several homomers) of a single protein. It thus allows the detection of structural variability between different chains. The methodological advances and the achievement of the SAFlex alphabet are the main contributions of this PhD. We also present the new PDB parser(SAFlex-PDB) and we demonstrate that our parser is therefore interesting both qualitative (detection of various errors) and quantitative terms (program optimization and parallelization) by comparing it with two other parsers well-known in the area of Bioinformatics (Biopython and BioJava). The SAFlex structural alphabet is being made available to the scientific community by providing a website. The SAFlex web server represents the concrete contribution of this PhD while the SAFlex-PDB parser represents an important contribution to the proper function of the proposed website. Here, we describe the functions and the interfaces of the SAFlex web server. The SAFlex can be used in various fashions for a protein tertiary structure of a given PDB format file; it can be used for encoding the 3D structure, identifying and predicting missing data. Hence, it is the only alphabet able to encode and predict the missing data in a 3D protein structure to date. Finally, these improvements; are promising to explore increasing protein redundancy data and obtain useful quantification of their flexibility

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Bloom, Jesse D. "Hidden dimensions in protein evolution: stability, mutational robustness, and evolvability." Thesis, 2007. https://thesis.library.caltech.edu/1984/1/bloom_thesis.pdf.

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Proteins are evolvable in the sense that they are readily able to acquire new or improved functions through the process of mutation and selection. Here, I examine what properties influence the ability of proteins to evolve new functions. I show that proteins with similar biochemical properties can differ substantially in their capacities to withstand mutations and evolve new functions. Specifically, more stable proteins are both more mutationally robust and more evolvable, due to improved tolerance for mutations. This fact can be exploited in protein engineering. I then show how evolutionary theory can be modified to describe how a protein's mutational robustness changes during the normal course of neutral genetic drift. One of the main theoretical predictions is that proteins evolving in larger populations will gain excess stability and mutational robustness, a prediction which I confirm experimentally. Finally, I turn to the question of how neutral genetic drift can alter "promiscuous" protein functions that are not under selection. I show that promiscuous functions can change significantly during genetic drift, a phenomenon that may aid in the evolution of beneficial new functions. Overall, this work establishes two mechanisms whereby initially neutral mutations can influence the course of future evolution.

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Min-Ta, Chang. "Viual Apprearance Retrieval Based on the 2-dimensional Pseudo Hidden Markov Model." 1997. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0009-0112200611293731.

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Hoffman, Neil Reardon. "Properties of commensurability classes of hyperbolic knot complements." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-3063.

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This thesis investigates the topology and geometry of hyperbolic knot complements that are commensurable with other knot complements. In chapter 3, we provide an infinite family examples of hyperbolic knot complements commensurable with exactly two other knot complements. In chapter 4, we exhibit an obstruction to knot complements admitting exceptional surgeries in conjunction with hidden symmetries. Finally, in chapter 5, we discuss the role of surfaces embedded in 3-orbifolds as it relates to hidden symmetries.
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Jordan, Blake. "The hidden conformal symmetry and quasinormal modes of the four dimensional Kerr black hole." Thesis, 2012. http://hdl.handle.net/10539/11831.

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This dissertation has two areas of interest with regard to the four dimensional Kerr black hole; the rst being its conformal nature in its near region and second it characteristic frequencies. With it now known that the scalar solution space of the four dimensional Kerr black hole has a two dimensional conformal symmetry in its near region, it was the rst focus of this dissertation to see if this conformal symmetry is unique to the near region scalar solution space or if it is also present in the spin-half solution space. The second focus of this dissertation was to explore techniques which can be used to calculate these quasinormal mode (characteristic) frequencies, such as the WKB(J) approximation which has been improved from third order to sixth order recently and applied to the perturbations of a Schwarzschild black hole. The additional correction terms show a signi cant increase of accuracy when comparing to numerical methods. This dissertation shall use the sixth order WKB(J) method to calculate the quasinormal mode frequencies for both the scalar and spin-half perturbations of a four dimensional Kerr black hole. An additional method used was the asymptotic iteration method, a relatively new technique being used to calculate the quasinormal mode frequencies of black holes that have been perturbed. Prior to this dissertation it had only been used on a variety of Schwarzschild black holes and their possible perturbations. For this dissertation the asymptotic iteration method has been used to calculate the quasinormal frequencies for both the scalar and spin-half perturbations of the four dimensional Kerr black hole. The quasinormal mode frequencies calculated using both the sixth order WKB(J) method and the asymptotic iteration method were compared to previously published values and each other. For the most part, they both compare favourably with the numerical values, with di erences that are near negligible. The di erences did become more apparent when the mode number (or angular momentum per unit mass increased), but less so when the angular number increased. The only factor that separates these two methods signi cantly, was that the computational time for the sixth order WKB(J) method is less than than that of the asymptotic iteration method.

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Rösken-Winter, Bettina [Verfasser]. "Hidden dimensions in the professional development of mathematics teachers : in-service education for and with teachers / von Bettina Rösken." 2009. http://d-nb.info/994287585/34.

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Pires, Pedro Miguel da Silva. "e-HRM: unveiling the hidden dimensions of value creation within strategic human resources management using human resources information systems: a case study analysis." Master's thesis, 2018. http://hdl.handle.net/10071/18304.

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In the age of the digital society, a new paradigm of de-materialization crosses all dimensions of the organizations, and to the activities regarding Human Resources Management, this new digital imperative is no exception. Despite extensive theory that shows the financial and operational benefits inherent to the implementation of HR Information Systems, this theoretical research is not that much consistent when it comes to finer dimension of analysis. Starting from a case study approach, within a multinational corporation, operating in Portugal, this study had as its main goal to determine value creation dimensions upon the implementation of HR Information Systems, by crossing both emerging dimensions from existing empirical theory and testing its adherence to what would be reported by the interviewed sample of key stakeholders within the mentioned multinational organization, providing as well a decision model to future implementation projects. For that, several interviews were conducted with strategic stakeholders in the HR Organization, in the observed organization, and the qualitative data analysis procedures followed. The results of this analysis allowed to confirm that the key stakeholders adhered to the six main dimensions that were seen as critical to the organizational stakeholders involved in strategic human resources management policies design, and allowed the suggestion as well of a model for strategical orientation built upon the compliance on those very same strategic focus points.
Na era da sociedade digital, um novo paradigma de desmaterialização atravessa todas as dimensões das organizações e para as atividades afetas à Gestão de Recursos Humanos o imperativo digital não é exceção. Apesar da extensa bibliografia acerca dos benefícios financeiros e operacionais inerentes à implementação de Sistemas de Informação de RH, este levantamento não existe de forma tão consistente em dimensões mais finas de análise. Partindo de um estudo de caso de uma empresa multinacional a operar em Portugal, este estudo teve como principal objetivo apurar possíveis dimensões de criação de valor aquando da implementação de sistemas de informação de RH, ao cruzar as dimensões emergentes da teoria e testar a sua aderência empírica, providenciando também um modelo de decisão para futuras implementações. Para isso foram conduzidas entrevistas a stakeholders estratégicos de RH na organização estudada e seguiu-se o posterior tratamento de análise qualitativa de dados. Os resultados permitiram confirmar a aderência a seis dimensões vistas como mais críticas para os stakeholders organizacionais envolvidos no desenho de políticas de gestão estratégica de RH, e sugerir um modelo de orientação estratégica assente na compliance com estes mesmos focos.

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Taylor, Graham William. "Composable, Distributed-state Models for High-dimensional Time Series." Thesis, 2009. http://hdl.handle.net/1807/19238.

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In this thesis we develop a class of nonlinear generative models for high-dimensional time series. The first key property of these models is their distributed, or "componential" latent state, which is characterized by binary stochastic variables which interact to explain the data. The second key property is the use of an undirected graphical model to represent the relationship between latent state (features) and observations. The final key property is composability: the proposed class of models can form the building blocks of deep networks by successively training each model on the features extracted by the previous one. We first propose a model based on the Restricted Boltzmann Machine (RBM) that uses an undirected model with binary latent variables and real-valued "visible" variables. The latent and visible variables at each time step receive directed connections from the visible variables at the last few time-steps. This "conditional" RBM (CRBM) makes on-line inference efficient and allows us to use a simple approximate learning procedure. We demonstrate the power of our approach by synthesizing various motion sequences and by performing on-line filling in of data lost during motion capture. We also explore CRBMs as priors in the context of Bayesian filtering applied to multi-view and monocular 3D person tracking. We extend the CRBM in a way that preserves its most important computational properties and introduces multiplicative three-way interactions that allow the effective interaction weight between two variables to be modulated by the dynamic state of a third variable. We introduce a factoring of the implied three-way weight tensor to permit a more compact parameterization. The resulting model can capture diverse styles of motion with a single set of parameters, and the three-way interactions greatly improve its ability to blend motion styles or to transition smoothly among them. In separate but related work, we revisit Products of Hidden Markov Models (PoHMMs). We show how the partition function can be estimated reliably via Annealed Importance Sampling. This enables us to demonstrate that PoHMMs outperform various flavours of HMMs on a variety of tasks and metrics, including log likelihood.

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Dissertations / Theses on the topic 'The Hidden Dimension'

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