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Tindle, Jennifer A. "Dimensions of Principal Support Behaviors and their Relationship to Organizational Citizenship Behaviors and Student Achievement in High Schools." W&M ScholarWorks, 2012. https://scholarworks.wm.edu/etd/1539618523.
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This research was designed with the primary purpose of identifying the dimensions of principal support perceived by public high school teachers in Virginia and identifying the relationship between principal support and organizational citizenship behaviors. In addition, this study also examined the relationship between principal support and student achievement; organizational citizenship and student achievement, as well as the interaction of Principal Support, Organizational Citizenship Behaviors and Student Achievement when controlling for SES. Participants in the study were self-selected after being contacted by a member of a team of researchers from The College of William & Mary. Thirty-four schools elected to participate in the survey which required teachers in the selected high schools to complete one of the two forms of the School Social Variables Survey. For this study, data were collected using the Organizational Citizenship Behaviors in Schools Survey, the Principal Support Survey, and Standard of Learning Test results for the areas of Algebra II, Biology, English 11 Reading, and World History I. SES was accounted for by calculating the percentage of free and reduced price lunch students served in each building.;This study found that principal support has two dimensions; expressive support and instrumental support. Only expressive support was found to have a significant positive relationship with organizational citizenship behavior. In addition, this study found that there was a significant and positive correlation between SES and all measures of student achievement. It also found that there was a significant positive correlation between Organizational Citizenship Behaviors and the measures of student achievement for Biology and English 11.;No significant correlation was found between instrumental support and organizational citizenship, either dimension of principal support and student achievement, or organizational citizenship and the student achievement measures of Algebra II or World History I.
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AOYAMA, ATSUKO, SANEYA RIZK EL BANNA, NAGAH MAHMOUD ABDOU, et al. "Dimensions of Women’s Empowerment and Their Influence on the Utilization of Maternal Health Services in an Egyptian Village: A Multivariate Analysis." Nagoya University School of Medicine, 2014. http://hdl.handle.net/2237/19494.
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High, Lisa Gaines. "Elementary Principals' Behaviors and Collaborative Professional Learning Communities." ScholarWorks, 2020. https://scholarworks.waldenu.edu/dissertations/7929.
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Principals need to possess leadership skills and behaviors that help set expectations for collaborative work. The problem in this case study was that little was known about the collaboration-building behaviors principals use that promote effective collaboration between members of the school community. The purpose of this qualitative study was to explore and describe the behaviors principals exhibit when building collaboration through the implementation of Professional Learning Communities (PLCs). The conceptual framework was based on 3 elements: leadership styles and approaches, collaboration, and the implementation of effective PLCs. The primary research question explored how principal behaviors contribute to collaborative professional learning communities. Purposeful sampling was used to recruit 6 elementary principals from a Mid-Atlantic State. Data were collected through semistructured interviews and document review of PLC structures. Data were coded using a Microsoft Word Doc Data Extract tool and analyzed for themes using an inductive process. Emergent themes for building collaboration were identified as leadership traits, vision, time, collaborative structures, culture, and the need for professional learning. Results suggest that shared leadership, vision, collective learning, and supportive conditions influence the effective development of PLCs. As a result, professional learning opportunities are recommended for school leaders on strategies that successfully develop supportive and collaborative structures in schools. Implications for social change are that PLCs may strengthen professional practice in classrooms, schools, districts, and communities.
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Bolin, Henrik. "Direkt pedagogiskt ledarskap och dess samband med rektors förutsättningar." Thesis, Umeå universitet, Statsvetenskapliga institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-170784.
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This study examines the relation between the prerequisites of principals in compulsory schools and to what extent they hence engage in instructional leadership. Three main questions are therefore posed which seek to describe how frequently the principals say that they engage in instructional leadership, how the principals say that their prerequisites are and to what extent these prerequisites affect their ability to be instructional leaders. A hypothesis is formulated that principals with favourable prerequisites are more likely to engage in an instructional leadership. To define instructional leadership Viviane Robinsons leadership dimensions ”planning, coordinating and evaluating teaching and the curriculum” and ”promoting participating in teacher learning and developement” are used as the foundation for the operationalisation of questions in the survey. The study finds that most of all the national principal education program affects the principals ability to be instructional leaders. Also the school managerand the municipal political board are important factors for the principals engagement in instructional leadership. Furthermore this study implicates that prerequisites, such as the number of employees or the time the principals say they have to be instructional leaders, have no, or almost no, effect on how frequently the principals engage in instructional leadership.
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Olarnsakul, Tavin. "Are Personality Traits a Viable Indicator of the Agency and Disposition Effect?" Scholarship @ Claremont, 2016. http://scholarship.claremont.edu/cmc_theses/1384.
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Can the HEXACO personality dimensions and facets be used to explain the principal-agent problem and the disposition effect? The proposed research is designed to address the relationship between personality dimensions and individuals’ propensity to engage in self-interested behavior (agency effect) and irrational investment decisions (disposition effect). This paper proposes a correlational study that will be one of the first to apply Ashton and Lee’s (2009) HEXACO framework of personality to examine the association between the six personality dimensions and measurements of the agency and disposition effect. The HEXACO model of personality dimension includes Honesty-Humility, Emotionality, Openness to Experience, Extraversion, Conscientiousness, and Agreeableness. Total participants in both experiments will be 480 undergraduate college students. Participating students will complete the HEXACO-60 self-report inventory and take part in a stock simulation where measurements of interests are recorded. Higher scores along the Honesty-Humility and Emotionality dimensions are expected to have a strong negative relationship with the agency effect measurement, while Openness to Experience, Conscientiousness, Agreeableness, and Extraversion will have a weak to moderate positive association. Higher scores along the Emotionality dimensions are expected to have a strong negative association with the disposition effect measurement, while lower scores of Conscientiousness are expected to have a positive relationship.
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Aljarrah, Inad A. "Three Dimensional Face Recognition Using Two Dimensional Principal Component Analysis." Ohio University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1142453613.
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Brum, Fernanda Thiesen. "Integrando aspectos filogenéticos e funcionais na biogeografia da conservação de vertebrados." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/117879.
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Estimativas recentes mostram que as taxas atuais de extinção são muito maiores do que o indicado pelo registro fóssil, sendo as principais ameaças resultado da atividade humana. Como a crise da biodiversidade age em todas as escalas e não apresenta fronteiras políticas, a aplicação do arcabouço teórico da biogeografia da conservação e do planejamento sistemático para conservação se torna muito útil para a identificação de áreas com alto valor de conservação que sejam significativas em um contexto global, continental ou regional. Além da dimensão taxonômica, as dimensões funcional e filogenética da biodiversidade são componentes importantes para a conservação, e a sua perda implica não somente em perda de espécies, mas também na perda de funções ecossistêmicas e de trajetórias evolutivas. O objetivo desta tese foi avaliar como o impacto humano atual gerado pelo uso da terra, influencia padrões funcionais (relacionados ao risco de extinção, Capítulo 1) e filogenéticos (Capítulo 2) de distribuição, e como informações filogenéticas e de atributos podem ser utilizadas para informar priorização espacial pra conservação (Capítulo 3). Nos capítulos 1 e 2 encontrei que a influência do uso da terra sobre a biodiversidade não está restrita apenas às escalas mais locais e de paisagem, mas também já é perceptível em escalas geográficas amplas. Além disso, verifiquei que o uso da terra tem impacto não somente na dimensão taxonômica, mas também nas dimensões filogenética e funcional da diversidade de vertebrados nessa escala macrogeográfica. Isso demonstra a necessidade de um planejamento de ocupação e manejo de áreas utilizadas para atividades humana em ampla escala também, pois o impacto humano não se dá mais somente em escalas finas. O uso atual da terra representa uma ameaça real maior para algumas linhagens de anfíbios (Capítulo 1) e de primatas (Capítulo 2), como, por exemplo, Microhylidae e Atelidae, respectivamente. Isso reforça a necessidade de utilizarmos abordagens filogenéticas que identifiquem quais linhagens estão mais suscetíveis aos impactos decorrentes de atividades humanas. Ao tentar maximizar a a conservação das dimensões taxonômica, filogenética e funcional da biodiversidade de mamíferos, a congruência entre as áreas selecionadas como prioritárias foi baixa. A integração dos diferentes componentes da biodiversidade para selecionar áreas mais eficientes para a conservação das espécies ainda é um desafio. O desencontro entre as prioridades de conservação para as diferentes dimensões da biodiversidade ressalta a necessidade o desenvolvimento de abordagens mais integrativas para a conservação da biodiversidade.<br>Recent estimates show that current exticntion rates are much higher than the indicated by fossil records. The causes of this elevated rate are mostly result of human activities. The biodiversity crisis affects all scales and presents no political boundaries, the application of the theoretical and analytical framework of Conservation Biogeography and Systematic Conservation Planning becomes very useful to identify meaningful areas with high conservation value locally and globally. In addition to taxonomic diversity, functional and phylogenetic dimensions of biodiversity are also important components to preserve, and their loss implies not only on species number, but also loss of ecosystem services and evolutionary history. The aim of the thesis was to evaluate how impacts of human land use influences functional (related to extinction risk, Chapter 1) and phylogenetic (Chapter 2) distribution patterns, and how phylogenetic and trait information could be used to inform spatial conservation prioritization (Chapter 3). In the chapter 1 and 2 I found that the influence of land use on the biodiversity is not constrained to local and landscape scales, but has an effect at broad-scales too. Besides, I verified that land use impacts on phylogenetic and functional dimensions on macrogeographical scales. These results show a need of creating a broad scale planning for ocupation and management of areas intended to human activities. Current land use is a major threat to some lineages of amphibians (Chapter 1) and primates (Chapter 2), as for example Microhylidae and Atelidae respectively. That reinforces the need of phylogenetics approaches that identify which lineages are more exposed to human activities. We found low congruence between priority areas for maximize the conservation of taxonomic, functional and phylogenetics dimensions of biodiversity. The integration of the differnt componentes of diversity to conservation still is a chalenge. The mismatch of the conservation priorities across the different dimension highlights the necessity of an integrative approach to biodiversity conservation.
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VECCE, Antonio. "Il principio di legalità tra dimensione europea e dimensione nazionale." Doctoral thesis, Università degli Studi di Palermo, 2020. http://hdl.handle.net/10447/401541.
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Chabbi, Houda. "Construction de facettes 3D par stéréovision intégrant des principes de géométrie projective." Vandoeuvre-les-Nancy, INPL, 1993. http://docnum.univ-lorraine.fr/public/INPL_T_1993_CHABBI_H.pdf.
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Le travail présenté dans ce mémoire s'inscrit dans le cadre de la vision artificielle et l'objectif recherche est de développer un processus de reconstruction stéréoscopique des facettes 3D des scènes observées. Le principe fondamental que nous avons suivi pour réaliser la construction de facettes 3D a été d'éviter dans la mesure du possible, tout calcul direct sur les segments 3D. Nous avons alors proposé un protocole d'utilisation de l'information région et l'information contour pour construire des indices 2D: facettes 2D par l'intermédiaire desquels nous inférons l'existence d'un plan 3D. Utilisant ensuite des techniques de géométrie projective, nous vérifions en 2D la validité de l'hypothèse de planarité relative à chacun de ces indices. La recherche des paramètres de chacune des facettes 3D de la scène utilise alors toute l'information acquise en 2D concernant les propriétés 3D à vérifier par ces facettes à construire. Cette reconstruction permet ainsi de maintenir la propriété de planarité ou encore de coplanarité entre facettes améliorant la localisation 3D de ces primitives
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Uppman, Hannes. "The Reflection Principle for One-dimensional Quasiminimizers." Thesis, Linköping University, Department of Mathematics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-19162.
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<p>In this paper the reflection-extension of one-dimensional quasiminimizers is studied.A brief introduction to quasiminimizers, focused on the one-dimensional ones, is given.The main result of the study concerns the size of the quasiminimizing constant of theextended function relative to the unextended one. Previous work by O. Martio gives anupper bound for this relation. This bound is lowered, and the new bound is proven to besharp.Sharp quasiminimizer constants are calculated for a few simple functions and theirreflection-extensions.</p><br><p>I det här arbetet studeras reflektionsutvidgningen av endimensionella kvasiminimerare.En kortfattad introduktion till kvasiminimerare, fokuserad på de endimensionella, ges.Huvudresultatet av arbetet rör storleken av kvasiminimerarkonstanten för den utvidgade funktionen i förhållande till den outvidgade. Tidigare arbete av O. Martio ger en övre gräns för detta förhållande. Den gränsen sänks, och den nya gränsen visas vara skarp.Skarpa kvasiminimerarkonstanter ges för ett par enkla funktioner och för deras reflektionsutvidgningar.</p>
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Krohn, Betty June Burns. "The Dimension of Risk and its Relationship to Effective School Leaders." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc277861/.
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The purpose of this study was to determine if a relationship existed between teachers' or principals' effectiveness and their risk tendency. The population consisted of 57 principals and 115 teachers from the state of Texas from average and exemplary campuses. The exemplary campuses were those nominated by Texas Education Agency to participate in the National Exemplary School Recognition Program for the past four years. Data was generated by sending a survey packet to the 57 campuses requesting that the principal and two teachers (one who had been recently been recognized as teacher of the year and one who had never been so honored) complete the instruments. Teachers responded to a 16 item Risk Tolerance Questionnaire and principals responded to the Risk Tolerance Questionnaire and a Styles of Leadership Survey. The hypothesis that exceptional teachers will not take more risks was not upheld. It was determined that exceptional teachers do take more risks; however, there was no significant difference in scores on the Risk Tolerance Questionnaire of principals from average and exemplary campuses. The findings were that 1) exceptional teachers do take more risks, 2) age and years of experience of teachers was not significant, 3) principals from average and exemplary campuses did not score significantly different on the risk instrument, 4) principals' years of experience was not significant, 5) sex of principals was significant in determining style of leadership, and 6) there was no relationship established between principals' risk tendencies and styles of leadership. It may be concluded that leadership style may be reflective of the work situation and its people, while the tendency to take risks is an independent attribute.
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Faggion, Mauro <1976>. "L'evoluzione dell'arm's lenght principle nella dimensione internazionale e comunitaria." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amsdottorato.unibo.it/9122/1/tesi%20definitiva_17_06_2019%20%283%29.pdf.
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Fischer, Aurélie. "Apprentissage statistique non supervisé : grande dimension et courbes principales." Paris 6, 2011. http://www.theses.fr/2011PA066142.
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Le contexte général de cette thèse est celui de l’apprentissage statistique non supervisé. Nous nous intéressons aux problématiques de la quantification et des courbes principales, que nous étudions dans deux parties successives. La première partie, qui concerne la quantification, se divise en trois chapitres. Le premier chapitre présente quelques propriétés théoriques de la quantification et du clustering dans un espace de Banach, en utilisant des divergences de Bregman comme notion de distance. Dans le deuxième chapitre, qui traite du clustering de courbes dans le cadre de l’industrie nucléaire, nous examinons une méthode de réduction de la dimension reposant sur la projection sur une base hilbertienne. Le troisième chapitre est dédié au choix du nombre de groupes en clustering. La seconde partie de la thèse, consacrée aux courbes principales, comporte deux chapitres. Ces courbes paramétrées passant « au milieu » d’un nuage de points peuvent être vues comme une généralisation non linéaire de l’Analyse en Composantes Principales. Comme il existe différents points de vue sur les courbes principales, le premier chapitre propose une synthèse bibliographique sur ce sujet. Selon la définition retenue, une courbe principale dépend de certains paramètres, comme la longueur ou la courbure, qui doivent être correctement déterminés pour obtenir une courbe reflétant précisément la forme des données sans pour autant relier tous les points. Dans le second chapitre, adoptant une définition basée sur la minimisation d’un critère empirique de type moindres carrés, nous considérons le problème du choix de ces paramètres sous l’angle de la sélection de modèle par pénalisation.
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Chakir, El-Alaoui El-Houcine. "Les métriques sous riemanniennes en dimension 3." Rouen, 1996. http://www.theses.fr/1996ROUES055.
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Cette thèse est consacrée essentiellement à l'étude des métriques sous-riemanniennes dites de contact en dimension 3. Bien que cette étude soit faite localement, on observe des différences fondamentales avec les métriques riemanniennes. En particulier, les lieux conjugue et cut d'un point p contiennent p dans leur adhérence. Ce travail se divise en deux parties : 1. On montre, dans un premier temps, qu'on peut associer à toute métrique sous-riemannienne de contact formelle une forme normale formelle. Ensuite, dans un deuxième temps, on montre que cette forme normale est actuellement lisse (i. E. C, c) si la métrique l'est. Aussi, cette forme normale permet de définir des invariants associés aux métriques sous-riemanniennes de contact. 2. A l'aide de cette forme normale on prouve que l'application exponentielle d'une métrique sous-riemannienne de contact générique est déterminée par un certain jet fini de la métrique. Et on en déduit une classification générique de ces singularités (i. E. Lieux conjugués).
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Lavecchia, Salvatore. "Autoconocimiento y creación de un cosmos. Dimensiones de la sofia en el pensamiento de Platón." Pontificia Universidad Católica del Perú - Departamento de Humanidades, 2012. http://repositorio.pucp.edu.pe/index/handle/123456789/112809.
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A pesar de que el concepto de sophia ocupa un lugar central en el pensamiento de Platón, hasta ahora no se han analizado adecuadamente los pocos pasajes de los diálogos platónicos en los que este concepto se examina directamente. A partir de estos pasajes, se puede mostrar que la sophia es una unidad viva de conocimiento y acción basada en la experiencia del principio supremo, esto es, del Bien. Esta experiencia lleva al hombre a transcenderse a sí mismo y volverse semejante al Intelecto (nous) que crea y guía al universo. De esta manera, el hombre se vuelve capaz de transformar la propia vida en un cosmos que, permeado por el Bien, se revela como una manifestación de la verdadera belleza. --- Self-knowledge and Creation of a Cosmos. Dimensions of sofia in Plato’s Thought”. Even though the concept of sophia holds a central role in Plato’s thought, the few passages of the Platonic dialogues in which this concept is examined directly have not been adequately analyzed until now. In the consideration of these passages, one can prove that sophia is a living unity of knowledge and action based on the experience of the supreme principle, that is, of the Good. This experience leads man to transcend himself and to become similar to the Intellect (nous) that creates and guides the universe. This way, man becomes capable of transforming his own life into a cosmos that, permeated by the Good, reveals itself as a manifestation of true beauty.
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Spear, Lorna L. "Mentoring the emotional dimensions of leadership : the perceptions of interns /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/7785.
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Kaufman, Jason R. "Digital video watermarking using singular value decomposition and two-dimensional principal component analysis." Ohio : Ohio University, 2006. http://www.ohiolink.edu/etd/view.cgi?ohiou1141855950.
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Hategekimana, Robert. "La motivation des cadres pour développer leur employabilité : dimensions et principaux déterminants." Aix-Marseille 3, 2002. http://www.theses.fr/2002AIX32040.
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Cette recherche vise à mieux comprendre les conditions de développement de l'employabilité chez les cadres d'entreprise, à identifier les principales dimensions de l'employabilité et les principaux déterminants de motivation qui peuvent encourager les salariés (cadres) à la développer. Sur le plan méthodologique, cette thèse est basée sur une approche essentiellement exploratoire. Elle conjugue une approche exploratoire qualitative et quantitative mettant en œuvre des techniques d'analyse du contenu et de régression hiérarchique pas à pas. Elle repose sur une étude qualitative des entretiens approfondis avec un échantillon de vingt cadres de profils variés, une étude préliminaire quantitative avec 102 cadres et 411 cadres pour une étude finale quantitative. Les résultats montrent les liens entre différentes formes d' employabilité centrées sur l'adaptation ou sur l'évolution. Ils font ressortir les éléments de motivation des salariés pour développer leur employabilité (épanouissement personnel, évolution professionnelle, sécurité par rapport à l'emploi, rémunération) et les conditions de développement de l'employabilité dans l'entreprise liées à sa politique d'information, à l'attitude de son encadrement, à sa politique sociale et salariale. Les implications théoriques et manageriales de résultats de cette recherche sont discutées<br>This research aims to understand the conditions of development the 'employability' of middle manager and to identify the principales dimensions and determiners. On a methodological plan, this research is based on an essentially exploratory approach which combines a qualitative and quantitative methodes. This research use the analysis techinics of the contents and progressive hierarchical regression. It is based on qualitative study of detailled thorough interviews with sample of twenty managers with various profiles, a preliminary quantitative study with one hundred and two managers and final quantitative study with four hundred and eleven managers. The results show the principales dimensions of 'employability': information and formation, mobity,development and professional orientation. The results show too the links between differents forms of 'employability' focused on adaptation or evolution. They put the evidence on the motivation of wage- earners to develop their 'employability' (personnal achievement, professional evolution, joblinked security, remuneration) and the development conditions of 'employability'in the organization linked to his policy of the information and formation, to the attitude of the staff manager, and to the social and remuneration policy. The managerial implications of this research results are discussed
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Eyre, Emma. "Principals' perceptions of quality teaching." Master's thesis, Australian Catholic University, 2021. https://acuresearchbank.acu.edu.au/download/113afa8b1344fbd025b8c7e1522674f2bed125423304975f1bcf543e643da7ad/1155011/Eyre_2021_Principals_perceptions_of_quality_teaching.pdf.
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A plethora of research exists in the field of education with regards to what constitutes quality teaching. Tensions exist, however, within this body of research between notions of quality teaching as opposed to notions of quality teachers. This research project seeks to unpack this heavily nuanced notion of “quality”, specifically within the context of Queensland state high schools. The concept of quality is of serious concern for both practising teachers and those in leadership positions, particularly given student results are increasingly used to make determinations about the quality of teachers and of teaching.
Hence, while the research points to the need to interpret “quality” with caution, the research has inevitably been drawn into overlapping concerns that touch upon teacher evaluation methods, the role of professional standards for teachers, as well as the impact of socioeconomic factors on school and student success. Through the methodological approach of narrative analysis, the research aimed to elucidate from secondary school principals their perceptions of quality teaching, while also examining the impact of contextual factors within the individual principals’ schools. Data were collected from three Brisbane secondary school principals through face-to-face interviews and various school documents from each site.
This study’s findings show that determinations of quality teaching cannot be shaped without consideration of schools’ site-specific contextual factors. Disparity exists between what principals believe quality teaching to be. However, of greater significance is the revelation that principals rely on evidence of student engagement and teacher/student relationships as evidence of quality teaching.
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XIA, QI. "Sufficient Dimension Reduction with Missing Data." Diss., Temple University Libraries, 2017. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/469880.
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Statistics<br>Ph.D.<br>Existing sufficient dimension reduction (SDR) methods typically consider cases with no missing data. The dissertation aims to propose methods to facilitate the SDR methods when the response can be missing. The first part of the dissertation focuses on the seminal sliced inverse regression (SIR) approach proposed by Li (1991). We show that missing responses generally affect the validity of the inverse regressions under the mechanism of missing at random. We then propose a simple and effective adjustment with inverse probability weighting that guarantees the validity of SIR. Furthermore, a marginal coordinate test is introduced for this adjusted estimator. The proposed method share the simplicity of SIR and requires the linear conditional mean assumption. The second part of the dissertation proposes two new estimating equation procedures: the complete case estimating equation approach and the inverse probability weighted estimating equation approach. The two approaches are applied to a family of dimension reduction methods, which includes ordinary least squares, principal Hessian directions, and SIR. By solving the estimating equations, the two approaches are able to avoid the common assumptions in the SDR literature, the linear conditional mean assumption, and the constant conditional variance assumption. For all the aforementioned methods, the asymptotic properties are established, and their superb finite sample performances are demonstrated through extensive numerical studies as well as a real data analysis. In addition, existing estimators of the central mean space have uneven performances across different types of link functions. To address this limitation, a new hybrid SDR estimator is proposed that successfully recovers the central mean space for a wide range of link functions. Based on the new hybrid estimator, we further study the order determination procedure and the marginal coordinate test. The superior performance of the hybrid estimator over existing methods is demonstrated in simulation studies. Note that the proposed procedures dealing with the missing response at random can be simply adapted to this hybrid method.<br>Temple University--Theses
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Wang, Guoshen. "Analysis of Additive Risk Model with High Dimensional Covariates Using Correlation Principal Component Regression." Digital Archive @ GSU, 2008. http://digitalarchive.gsu.edu/math_theses/51.
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One problem of interest is to relate genes to survival outcomes of patients for the purpose of building regression models to predict future patients¡¯ survival based on their gene expression data. Applying semeparametric additive risk model of survival analysis, this thesis proposes a new approach to conduct the analysis of gene expression data with the focus on model¡¯s predictive ability. The method modifies the correlation principal component regression to handle the censoring problem of survival data. Also, we employ the time dependent AUC and RMSEP to assess how well the model predicts the survival time. Furthermore, the proposed method is able to identify significant genes which are related to the disease. Finally, this proposed approach is illustrated by simulation data set, the diffuse large B-cell lymphoma (DLBCL) data set, and breast cancer data set. The results show that the model fits both of the data sets very well.
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Kawharu, Merata. "Dimensions of kaitiakitanga : an investigation of a customary Maori principle of resource management." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264844.
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Bjorkman, Kaitlin. "A Weak Groethendieck Compactness Principle for Infinite Dimensional Banach Spaces." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3042.
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The goal of this thesis is to give an exposition of the following recent result of Freeman, Lennard, Odell, Turett and Randrianantoanina. A Banach space has the Schur property if and only if every weakly compact set is contained in the closed convex hull of a weakly null sequence. This result complements an old result of Grothendieck (now called the Grothendieck Compactness Principle) stating that every norm compact subset of a Banach space is contained in the closed convex hull of a norm null sequence. We include many of the relevant definitions and preliminary results which are required in the proofs of both of these theorems.
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Rasmussen, Johan, and David Nilsson. "Analys av punktmoln i tre dimensioner." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Datateknik och informatik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-36915.
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Syfte: Att ta fram en metod för att hjälpa mindre sågverk att bättre tillvarata mesta möjliga virke från en timmerstock. Metod: En kvantitativ studie där tre iterationer genomförts enligt Design Science. Resultat: För att skapa en effektiv algoritm som ska utföra volymberäkningar i ett punktmoln som består av cirka två miljoner punkter i ett industriellt syfte ligger fokus i att algoritmen är snabb och visar rätt data. Det primära målet för att göra algoritmen snabb är att bearbeta punktmolnet ett minimalt antal gånger. Den algoritm som uppfyller delmålen i denna studie är Algoritm C. Algoritmen är både snabb och har en låg standardavvikelse på mätfelen. Algoritm C har komplexiteten O(n) vid analys av delpunktmoln. Implikationer: Med utgångspunkt från denna studies algoritm skulle det vara möjligt att använda stereokamerateknik för att hjälpa mindre sågverk att bättre tillvarata mesta möjliga virke från en timmerstock. Begränsningar: Studiens algoritm har utgått från att inga punkter har skapats inuti stocken vilket skulle kunna leda till felplacerade punkter. Om en stock skulle vara krokig överensstämmer inte stockens centrum med z-axelns placering. Detta är något som skulle kunna innebära att z-värdet hamnar utanför stocken, i extremfall, vilket algoritmen inte kan hantera.<br>Purpose: To develop a method that can help smaller sawmills to better utilize the greatest possible amount of wood from a log. Method: A quantitative study where three iterations has been made using Design Science. Findings: To create an effective algorithm that will perform volume calculations in a point cloud consisting of about two million points for an industrial purpose, the focus is on the algorithm being fast and that it shows the correct data. The primary goal of making the algorithm quick is to process the point cloud a minimum number of times. The algorithm that meets the goals in this study is Algorithm C. The algorithm is both fast and has a low standard deviation of the measurement errors. Algorithm C has the complexity O(n) in the analysis of sub-point clouds. Implications: Based on this study’s algorithm, it would be possible to use stereo camera technology to help smaller sawmills to better utilize the most possible amount of wood from a log. Limitations: The study’s algorithm assumes that no points have been created inside the log, which could lead to misplaced points. If a log would be crooked, the center of the log would not match the z-axis position. This is something that could mean that the z-value is outside of the log, in extreme cases, which the algorithm cannot handle.
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Gul, Ahmet Bahtiyar. "Holistic Face Recognition By Dimension Reduction." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1056738/index.pdf.
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Face recognition is a popular research area where there are different
approaches studied in the literature. In this thesis, a holistic Principal
Component Analysis (PCA) based method, namely Eigenface method is
studied in detail and three of the methods based on the Eigenface method
are compared. These are the Bayesian PCA where Bayesian classifier is
applied after dimension reduction with PCA, the Subspace Linear
Discriminant Analysis (LDA) where LDA is applied after PCA and
Eigenface where Nearest Mean Classifier applied after PCA. All the
three methods are implemented on the Olivetti Research Laboratory
(ORL) face database, the Face Recognition Technology (FERET)
database and the CNN-TURK Speakers face database. The results are
compared with respect to the effects of changes in illumination, pose and
aging. Simulation results show that Subspace LDA and Bayesian PCA
perform slightly well with respect to PCA under changes in pose<br>however, even Subspace LDA and Bayesian PCA do not perform well
under changes in illumination and aging although they perform better
than PCA.
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Legenkaia, Mariia. "Reconstruction of low-dimensional neural trajectories from population activity recordings : from statistical limitations to experimental design." Electronic Thesis or Diss., Université Paris sciences et lettres, 2024. http://www.theses.fr/2024UPSLE009.
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Les techniques d’enregistrement multi-électrodes ou d’imagerie calcique permettent désormais de mesurer l’activité de centaines, voire de milliers de neurones dans une région du cerveau. Une hypothèse courante est que cette activité de haute dimension est intégrée dans une variété de basse dimension, et décrit une trajectoire qui renseigne, par exemple, sur les calculs sensoriels ou moteurs en cours. L’analyse en composantes principales, parmi d’autres méthodes de reconstruction de variété, est couramment utilisée pour inférer le sous-espace neuronal pertinent et visualiser les trajectoires correspondantes. Un enjeu important est la fiabilité de ce processus de reconstruction de trajectoire. La durée limitée d’enregistrement, la taille de la population enregistrée, la présence de bruit neuronal dynamique, ainsi que les limitations intrinsèques des méthodes d’enregistrement, telles que les erreurs ou les biais dans l’identification des spikes à partir de signaux de tension ou de fluorescence, peuvent considérablement affecter les trajectoires reconstruites et notre compréhension des processus computationnels sous-jacents. Dans notre travail, nous présentons une caractérisation systématique de ces effets sur l’inférence de trajectoire en basse dimension. Nous obtenons des expressions analytiques pour l’erreur de reconstruction en utilisant les outils de la physique statistique des systèmes désordonnés, et établissons des diagrammes de phase localisant les régions où l’erreur est maîtrisée, et celles où la reconstruction est impossible. Nos résultats sont confirmés par des simulations numériques étendues. Nous montrons ensuite, sur divers enregistrements existants dans le cortex visuel, l’hippocampe et le cortex préfrontal, comment nos résultats peuvent être utilisés pour caractériser l’erreur attendue sur les trajectoires obtenues à partir de jeux de données réels<br>Multi-electrode or calcium-imaging techniques now make possible to record the activity of hundreds or thousands of neurons in a brain area. A common assumption is that this high-dimensional activity is embedded on a low-dimensional manifold, and describes a trajectory informative about the ongoing e.g. sensory or motor computations. Principal component analysis, among other manifold-reconstruction methods, is routinely used to infer the relevant neural subspace and visualize the corresponding trajectories. An important issue is the reliability of this trajectory reconstruction process. The limited recording time, the size of the recorded population, the presence of dynamical neural noise, as well as intrinsic limitations of the recording methods, such as errors or biases in spike identification from voltage or fluorescence signals may considerably affect the reconstructed trajectories, and our understanding of the underlying computational processes. In our work, we present a systematic characterization of these effects on low-dimensional trajectory inference. We derive analytical expressions for the reconstruction error using the tools of the statistical physics of disordered systems, and derive phase diagrams locating regions in which the error is under control, or in which reconstruction is not possible. Our results are confirmed by extensive numerical simulations. We then show, on various existing recordings in the visual cortex, the hippocampus, and in the prefrontal cortex, how our results can be used to characterize the expected error on trajectory obtained from real datasets
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Layng, Alexander Patrick. "Two-dimensional landmark analysis of Spinocyrtid brachiopods of Euramerica during the Givetian." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5799.
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Recent inquiry into the nomenclature of several species within Spinocyrtia has led to questions concerning name applicability and validity, particularly whether Delthyris granulosa and Spinocyrtia (Spirifer) granulosa are synonymous. This study utilized two-dimensional outline landmark analysis, a form of geometric morphometric analysis, to evaluate interspecific variation among these species. I took over a thousand photographs of over a hundred specimens of brachiopods belonging to the family Spinocyrtiidae. Ninety-six specimens originated from the Givetian outcrop belt of New York state, three were from northwestern Ohio, there was single Canadian specimen, and there was a single German specimen. The results from these analyses indicate that the mophospaces of Spinocyrtia (Spirifer) congesta, S. (Spirifer) granulosa, and S?. (Spirifer) marcyi are statistically (p < 0.05) distinct from one another.
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Coleman, Ashley B. "Feature Extraction using Dimensionality Reduction Techniques: Capturing the Human Perspective." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1452775165.
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Batzella, Francesca. "Faithful agent or independent actor? : the European Commission in the external dimension of EU Energy Policy." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/21033.
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Energy policy in the European Union (EU) is a patchwork of diverging interests and preferences. While the European Commission pushes for a common energy policy, Member States are responsible for their own separate energy policies. These divergences in interests and preferences might create a conflict situation between the Commission and Member States. This thesis explores the Commission’s behaviour vis-à-vis the Member States, investigating the conditions under which the Commission is likely to try to deviate from Member States’ preferences in the external dimension of the EU internal energy market. Adopting a Principal-Agent Model (PAM), this thesis conceptualizes the Member States as principals and the Commission as their agent. A qualitative case study approach and process-tracing method are applied to appreciate the variety of preferences of the actors involved, and provide a means to study the various shades of post-delegation agent’s behaviour. This thesis looks at four in-depth case studies: 1) Decision 994/2012 on establishing an information exchange mechanism with regard to intergovernmental agreements between Member States and third countries in the field of energy; 2) Directive 2009/73/EC on common rules for the internal market in gas; 3) Energy Community Treaty; and 4) Energy Charter Treaty. These were selected based on their relevance to the research question. Findings suggest that two factors are likely to affect the Commission’s deviation from Member States’ preferences: a) the preference alignment among the principals and b) the preference alignment between the principals and the agent. This thesis suggests that when the preferences between the agent and the principals are heterogeneous, the agent is more likely to deviate from the preferences of the principals. This thesis also suggests that the preference alignment among the principals only has a secondary effect on the agent’s deviation. Finally, this research contributes to the further development of the PAM offering a possible categorisation of post-delegation agent’s behaviour going beyond the dichotomy of deviation and non-deviation.
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Chan, Chi Hung. "3-dimensional Heisenberg antiferromagnet in cubic lattice under time periodic magnetic field /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202009%20CHANC.
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Magnier-Merran, Kevin. "La facture." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAA026/document.
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Document polyvalent, la thèse a pour ambition de démontrer que le détail juridique que la facture constitue en apparence, peut masquer des problématiques épineuses. La facture a été victime d'un détournement de fonction en raison de la pratique courante de l'insertion de données qui ne figureraient pas sur une facture rudimentaire. Il y a eu une inflation de la charge juridique contenue dans le document. C'est la possibilité du « phénomène contentieux » autour de l'acceptation d'une clause insérée dans la facture qui a permis à cette dernière d'intégrer la sphère contractuelle. Ce mouvement inflationniste s'est doublé d'une appropriation étatique du document. La juridicité du document a été renforcée par le législateur au nom d'un renforcement des conditions de libre concurrence conférant alors au document une dimension technique. Le document est alors marqué du sceau de l'autonomie, celle-ci menaçant alors d'autres droits fondamentaux et notamment, le principe de légalité, au nom d'une transparence invasive. La facture est alors sans aucun doute alors une image double. Ce qui saisit, c'est la trajectoire vécue par un document plus que polyvalent ayant pour point de départ une pratique naturelle et parvenant à un point d'arrivée technique et pesant. Le droit de la facture traduit fidèlement l'état d'un droit sous tension en ce que la législation obligatoire sur la facture est contraignante et ne répond pas aux exigences de sécurité juridique<br>Versatile paper, the thesis aims to demonstrate that the legal detail that the bill is apparently can hide thorny issues. The bill was the victim of a function of diversion due to the common practice of inserting data that do not appear on a rudimentary bill. There was an inflation of legal charge contained in the document. It is the possibility of " disputes phenomenon " around the acceptance of a clause in the bill which allowed the latter to integrate the contractual sphere. However, this movement is accompanied by another paradigm shift, when the legislature wished to seize the invoice into a competitive tool. Juridicity document has been strengthened by the legislature in the name of strengthening the conditions of free competition while giving the document a technical dimension. The document is then marked with the seal of autonomy, it then threatening other human rights, including the principle of legality, on behalf of invasive transparency. The invoice is then undoubtedly be a double image. What grabs is the trajectory experienced by a paper more versatile than having to base a natural practice and achieving a technical point of arrival and weighing. The right of the bill accurately reflects the state of a power law in that mandatory legislation on the invoice is binding and does not meet the requirements of legal certainty
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Lee, Ho-Jin. "Functional data analysis: classification and regression." Texas A&M University, 2004. http://hdl.handle.net/1969.1/2805.
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Functional data refer to data which consist of observed functions or curves evaluated
at a finite subset of some interval. In this dissertation, we discuss statistical
analysis, especially classification and regression when data are available in function
forms. Due to the nature of functional data, one considers function spaces in presenting
such type of data, and each functional observation is viewed as a realization
generated by a random mechanism in the spaces. The classification procedure in
this dissertation is based on dimension reduction techniques of the spaces. One commonly
used method is Functional Principal Component Analysis (Functional PCA) in
which eigen decomposition of the covariance function is employed to find the highest
variability along which the data have in the function space. The reduced space of
functions spanned by a few eigenfunctions are thought of as a space where most of the
features of the functional data are contained. We also propose a functional regression
model for scalar responses. Infinite dimensionality of the spaces for a predictor causes
many problems, and one such problem is that there are infinitely many solutions. The
space of the parameter function is restricted to Sobolev-Hilbert spaces and the loss
function, so called, e-insensitive loss function is utilized. As a robust technique of
function estimation, we present a way to find a function that has at most e deviation
from the observed values and at the same time is as smooth as possible.
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Barthel, Patrick Bernard. "Principales dimensions d'une stratégie marketing orientée éthique-développement durable : essai de modélisation d'un marketing responsable." Metz, 2007. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2007/Barthel.Patrick.DMZ0702.pdf.
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L'entreprise peut bénéficier d'un "avantage de marché" si elle est perçue comme "sociétalement responsable" par ses clients. Dans cette perspective, elle peut vouloir intégrer dans sa stratégie des valeurs éthiques ou de développement durable dont l'efficacité est toutefois tributaire de la capacité des "marketers" à traduire ces mêmes valeurs en bénéfices clients à travers un positionnement marketing adapté. L'objectif de cette recherche s'inscrit dans ce contexte et vise à définir les principales dimensions d’une stratégie marketing orientée "Ethique" ou "Développement Durable" au profit de l'image institutionnelle de l'entreprise et surtout de la Qualité Relationnelle Client. Un tel objectif a nécessité au préalable une réflexion sur le concept éthique conduisant à privilégier une "Ethique Compétence" dont la nature utilitariste et stratégique permet un meilleur ancrage dans les sciences de management. Il a également conduit à s'interroger sur les caractéristiques d’une approche intégrée d’un marketing dit éthique ou responsable focalisée autour de trois dimensions "P" (Produit), "R" (Relation) et "I" (Institution entreprise) et fortement imprégnée par les logiques complémentaires de la théorie des Parties Prenantes, de la théorie des Ressources et Compétences et enfin de la théorie de la Légitimité. Afin d'élaborer et conforter notre modèle d'interprétation, de nombreuses investigations empiriques sous forme d’enquêtes ou d’entretiens approfondis ont été réalisées à la fois auprès de responsables d'entreprise mais aussi de consommateurs pour cerner au mieux leurs représentations d'une organisation "sociétalement responsable"<br>The company can profit from a "market advantage" if it is perceived as "socially responsible" by its customers. From this point of view, it can aim to integrate ethics or sustainable development values in its strategy , even though efficiency then depends on the marketers' ability to turn those values into customer benefits through an adapted marketing policy. The goal of this research means to define the main dimensions of an ethics or sustainable development oriented marketing strategy in order to enhance the corporate institutional image as well as customer relational quality. Such a goal has required prior reflection on the ethic concept and has led to prefer a "competence ethic" whose utilitarian and strategic nature allows better anchoring in management sciences. It also led to a reflection on the integrated approach characteristics of ethic or responsible marketing. The approach is focused on three main features : Product (P), Relation (R) and Company Institution (I) and is highly impregnated with complementary logics of the Stakeholder theory, the Resource and Competence Theory and the Legitimacy Theory. In order to elaborate and back up our research, many empirical investigations like surveys, discussions, have been carried out among corporate managers as well as consumers, with a view to understanding their idea of a "socially responsible" organization
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Barthel, Patrick Bernard Solle Guy. "Principales dimensions d'une stratégie marketing orientée éthique / développement durable essai de modélisation d'un marketing responsable /." Metz : Université de Metz, 2007. ftp://ftp.scd.univ-metz.fr/pub/Theses/2007/Barthel.Patrick.DMZ0702.pdf.
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Agale, Ketaki. "Comparing Building Energy Benchmarking Metrics using Dimension Reduction Techniques." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563526931938378.
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Davison, Liam G. "Lay principals under contract: 'Going Down for the Good Turf': An exploration of the perceptions of selected secondary lay principals in relation to the religious and spiritual dimensions of their role." Thesis, Australian Catholic University, 2006. https://acuresearchbank.acu.edu.au/download/2dfacd8f2ac0a198ec44f954171140fc6961e0f2463fe0cf77d07783ab44732f/730352/64839_downloaded_stream_64.pdf.
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The purpose of this research study was to consider the understanding and experience of a selected number of lay principals of diocesan secondary Catholic schools in Victoria as to the religious and spiritual dimensions of their leadership role and to identify what supported them in the discharge of their responsibilities in these domains of their leadership.
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Astruc, Thierry. "Régularité des solutions pour des problèmes plastiques-parfaits en dimension 1." Paris 11, 1994. http://www.theses.fr/1994PA112020.
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Cette thèse est constituée de deux parties portant chacune sur l'étude de la régularité des solutions pour un problème plastique-parfait simplifié en dimension 1. Dans la première partie, on étudie un modèle plastique parfait sous forme variationnelle. On s'intéresse à la régularité, même en un sens faible, des solutions bv. On montre l'existence de charges limites régulières, en deca desquelles les solutions sont régulières et les conditions aux bornes vérifiées. On utilise pour cela le problème en contrainte qui est le problème dual au sens de la dualité convexe, et la relation d'extremalité. Dans la deuxième partie, on étudie le modèle avec un gradient contraint unilatéral. On commence par établir, au moyen d'une méthode de pénalisation et de la théorie des fonctions convexes de mesure, l'égalité entre les problèmes duaux. On retrouve ensuite l'existence des charges limites régulières. Des exemples d'applications de ces théorèmes sont donnés sur des modèles fondamentaux
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Little, Thomas S. "The Relationship of Right Brain/Left Brain Hemispheric Dimensions of Cognitive Style Between Teachers and Principals in Northeast Tennessee." Digital Commons @ East Tennessee State University, 1993. https://dc.etsu.edu/etd/2721.
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The Problem of this study was to determine if the cognitive style of elementary school principals affects the principal's evaluation of a teacher when there is a match or mismatch between the principal's and teacher's cognitive style. Using the Productivity Environmental Preference Survey, the dimensions of right brain/left brain hemispheric dimensions of cognitive style were measured for the sample population. The sample population included 40 elementary school principals and 120 elementary school teachers. The 120 teachers were made up of teachers selected by each of the 40 principals as the most effective teachers in the school. The statistical analysis of the data indicated there was not a significant correlation between the principal's right brain/left brain dimensions of cognitive style and the right brain/left brain dimensions of cognitive style of the teachers selected as the three most effective teachers in the school (r =.10, p =.281).
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Chow, Wai-yee. "How do school leaders shape school culture? a multi-dimensional perspective /." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B35344222.
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Watson, Andrew William. "Transverse Position Reconstruction in a Liquid Argon Time Projection Chamber using Principal Component Analysis and Multi-Dimensional Fitting." Diss., Temple University Libraries, 2017. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/448382.
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Physics<br>Ph.D.<br>One of the most enduring questions in modern physics is the dark matter problem. Measurements of galactic rotation curves taken in the middle of the twentieth century suggest that there are large spherical halos of unseen matter permeating and surrounding most galaxies, stretching far beyond their visible extents. Although some of this mass discrepancy can be attributed to sources like primordial black holes or Massive Astrophysical Compact Halo Objects (MACHOs), these theories can only explain a small percentage of this "missing matter". One approach which could account for the entirety of this missing mass is the theory of Weakly Interacting Massive Particles, or "WIMPs". As their name suggests, WIMPs interact only through the weak nuclear force and gravity and are quite massive (100 GeV/c2 to 1 TeV/c2). These particles have very small cross sections (≈ 10−39 cm2) with nucleons and therefore interact only very rarely with "normal" baryonic matter. To directly detect a dark matter particle, one needs to overcome this small cross-section barrier. In many experiments, this is achieved by utilizing detectors filled with liquid noble elements, which have excellent particle identification capabilities and are very low-background, allowing potential WIMP signals to be more easily distinguished from detector noise. These experiments also often apply uniform electric fields across their liquid volumes, turning the apparatus into Time Projection Chambers or "TPCs". TPCs can accurately determine the location of an interaction in the liquid volume (often simply called an "event") along the direction of the electric field. In DarkSide-50 ("DS-50" for short), the electric field is aligned antiparallel to the z-axis of the detector, and so the depth of an event can be determined to a considerable degree of accuracy by measuring the time between the first and second scintillation signals ("S1" and "S2"), which are generated at the interaction point itself and in a small gas pocket above the liquid region, respectively. One of the lingering challenges in this experiment, however, is the determination of an event’s position along the other two spatial dimensions, that is, its transverse or "xy" position. Some liquid noble element TPCs have achieved remarkably accurate event position reconstructions, typically using the relative amounts of S2 light collected by Photo-Multiplier Tubes ("PMTs") as the input data to their reconstruction algorithms. This approach has been particularly challenging in DarkSide-50, partly due to unexpected asymmetries in the detector, and partly due to the design of the detector itself. A variety of xy-Reconstruction methods ("xy methods" for short) have come and gone in DS- 50, with only a few of them providing useful results. The xy method described in this dissertation is a two-step Principal Component Analysis / Multi-Dimensional Fit (PCAMDF) reconstruction. In a nutshell, this method develops a functional mapping from the 19-dimensional space of the signal received by the PMTs at the "top" (or the "anode" end) of the DarkSide-50 TPC to each of the transverse coordinates, x and y. PCAMDF is a low-level "machine learning" algorithm, and as such, needs to be "trained" with a sample of representative events; in this case, these are provided by the DarkSide geant4-based Monte Carlo, g4ds. In this work, a thorough description of the PCAMDF xy-Reconstruction method is provided along with an analysis of its performance on MC events and data. The method is applied to several classes of data events, including coincident decays, external gamma rays from calibration sources, and both atmospheric argon "AAr" and underground argon "UAr". Discrepancies between the MC and data are explored, and fiducial volume cuts are calculated. Finally, a novel method is proposed for finding the accuracy of the PCAMDF reconstruction on data by using the asymmetry of the S2 light collected on the anode and cathode PMT arrays as a function of xy.<br>Temple University--Theses
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Shehzad, Muhammad Ahmed. "Pénalisation et réduction de la dimension des variables auxiliaires en théorie des sondages." Phd thesis, Université de Bourgogne, 2012. http://tel.archives-ouvertes.fr/tel-00812880.
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Les enquêtes par sondage sont utiles pour estimer des caractéristiques d'une populationtelles que le total ou la moyenne. Cette thèse s'intéresse à l'étude detechniques permettant de prendre en compte un grand nombre de variables auxiliairespour l'estimation d'un total.Le premier chapitre rappelle quelques définitions et propriétés utiles pour lasuite du manuscrit : l'estimateur de Horvitz-Thompson, qui est présenté commeun estimateur n'utilisant pas l'information auxiliaire ainsi que les techniques decalage qui permettent de modifier les poids de sondage de facon à prendre encompte l'information auxiliaire en restituant exactement dans l'échantillon leurstotaux sur la population.Le deuxième chapitre, qui est une partie d'un article de synthèse accepté pourpublication, présente les méthodes de régression ridge comme un remède possibleau problème de colinéarité des variables auxiliaires, et donc de mauvais conditionnement.Nous étudions les points de vue "model-based" et "model-assisted" dela ridge regression. Cette technique qui fournit de meilleurs résultats en termed'erreur quadratique en comparaison avec les moindres carrés ordinaires peutégalement s'interpréter comme un calage pénalisé. Des simulations permettentd'illustrer l'intérêt de cette technique par compar[a]ison avec l'estimateur de Horvitz-Thompson.Le chapitre trois présente une autre manière de traiter les problèmes de colinéaritévia une réduction de la dimension basée sur les composantes principales. Nousétudions la régression sur composantes principales dans le contexte des sondages.Nous explorons également le calage sur les moments d'ordre deux des composantesprincipales ainsi que le calage partiel et le calage sur les composantes principalesestimées. Une illustration sur des données de l'entreprise Médiamétrie permet deconfirmer l'intérêt des ces techniques basées sur la réduction de la dimension pourl'estimation d'un total en présence d'un grand nombre de variables auxiliaires
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Charlot, Antoine Yves. "Dimension juridique du secteur des huiles essentielles : aspects sécurité." Nice, 2003. http://www.theses.fr/2003NICE0054.
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La sécurité des huiles essentielles représente une préoccupation majeure des professionnels du secteur de l'aromatique. L'encadrement de ces matières par le droit est délicat dans la mesure où il s'agit d'un secteur très technique et que les autorités publiques ont parfois des difficultés à définir des règles cohérentes et adaptées aux réalités scientifiques. Par ailleurs, le concept d' huile essentielle n'existe pas dans notre ordre juridique. Que ce soit en milieu professionnel ou à l'égard des consommateurs, les réglementations sécuritaires applicables dépendent de l'utilisation qui est faite des produits, que ce soit dans le secteur de la chimie, de la cosmétique, de l'alimentaire ou de la pharmacie. Les huiles essentielles prennent à ce moment des qualifications particulières en fonction du domaine où elles sont exploitées. La notion de sécurité apparaît à travers ces différentes réglementations comme un concept très riche, comprenant non seulement des restrictions d'utilisation des substances, mais aussi des règles liées à l'information sur les dangers ou encore la traçabilité des produits. Le principe de précaution se voit dans ce cadre reconnaître une place prépondérante<br>Security of essential oil represents a major preoccupation for professionals of the aromatic area. Management of these materials is sensitive insofar as it's a very technical area and as public authorities sometimes have difficulties to define coherent rules suited to scientific realities. Otherwise, the concept of "essential oil" doesn't exist in our legal order. In the professional circle or with regard to the consumers, applicable security rules depends on the utilisation of the products in the chemical area, in cosmetics area, in foods area or in pharmaceutical area. Essential oils then cover specific qualifications according to the area where they're exploited. Through these different regulations, the notion of security seems complicated, including not only restrictions on the use of the substances but also rules concerning information on the dangers or concerning tractability of the products. In this context, the precautionary principle have been recognized an important role
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Davison, Liam G., and res cand@acu edu au. "Lay Principals Under Contract: ‘Going Down for the Good Turf’: An exploration of the perceptions of selected secondary lay principals in relation to the religious and spiritual dimensions of their role." Australian Catholic University. School of Educational Leadership, 2006. http://dlibrary.acu.edu.au/digitaltheses/public/adt-acuvp122.25102006.
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The purpose of this research study was to consider the understanding and experience of a selected number of lay principals of diocesan secondary Catholic schools in Victoria as to the religious and spiritual dimensions of their leadership role and to identify what supported them in the discharge of their responsibilities in these domains of their leadership. Based on this purpose, I identified three research questions: 1. What is the understanding of lay Catholic secondary principals in Victoria, of their role as a ministry within the Catholic Church? 2. In what ways have principals experienced the spiritual and religious dimensions of their leadership role? 3. In what ways have principals sought and/or experienced formation beyond academic study which has enriched their practice of principalship? The theoretical perspective of the research is Interpretative Constructionism and the methodology adopted is Multiple Informant Case Study. The researcher has taken the stance of ‘interrogatory fellow traveller’ in relation to the research informants. The methods used to gather data are (a) focus group, (b) biographical written statements, (c) document analysis and (d) personal reflection in response to the previous three methods. In general, the findings of this research study suggest that lay principals of Catholic secondary schools who were informants in the study understand the role of principal of a diocesan secondary school as a ministry within the Catholic Church. While the informants did not use overtly theological terms to articulate this understanding, the accounts of their experience in principalship and the insights gained through reflection on their leadership behaviour have led them to believe that they are in fact exercising a legitimate ministry within the field of Catholic secondary education in Victoria. This research has brought to light a body of knowledge about the work of a group of principals which has not previously been subject to critical scrutiny. While the study is of intrinsic merit in recognising and describing the work of secondary lay principals, from an instrumental perspective these findings raise a number of issues relating to the preparation, induction and support available to newly appointed and continuing principals in diocesan Catholic secondary schools in Victoria. As a consequence the following propositions are offered: Further study using a wider informant group of principals is warranted to confirm the findings of this enquiry and to expand on the knowledge already gained. Such study might include parallel studies of lay principals in congregation-owned schools, in other states of Australia or in other countries where the Catholic Church has established schools as an agency of its evangelising mission in education. This study is of potential assistance to aspiring principals, principals and system authorities in the planning and development of appropriate professional learning and support, including formal academic study and formational opportunities. The findings confirm the importance for leaders and aspiring leaders in Catholic education of sound theological and spiritual education as a necessary part of their preparation for leadership, both pre-service and in-service. The findings confirm the significance of appropriate liturgical induction or commissioning for principals. It is suggested that one practical form of support for principals is the provision of access to regular professional supervision and spiritual direction. It is recommended that the process of appointment and induction of principals be undertaken more systematically, perhaps using the principles of project management, especially in relation to the identification of enhancing and inhibiting factors present within the staff community at the time of the appointment of a new principal. The findings indicate that schools have had varied experiences of developing a distinctive ethos and charism, based on a particular founder or group of founders. It is recommended that all diocesan secondary schools be encouraged to develop an appropriate charism and spirituality, based on the character of the local faith community and the history of the particular school. The findings point to the need for further development of an authentic spirituality of educational and faith leadership, based in the reality of principals’ lives as family and community members and educators in faith of their staff and wider community. Informants to the study indicated their awareness of the tension between occupying a leadership role in the Church and personal positions in conscience on matters of Church teaching. Some further study of this issue may be warranted.
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Boltz, Sylvain. "Un cadre statistique en traitement d'images et vidéos par approche variationnelle avec modélisation haute dimension." Phd thesis, Université de Nice Sophia-Antipolis, 2008. http://tel.archives-ouvertes.fr/tel-00507488.
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Cette thèse aborde le traitement d'images et de vidéos sous l'angle variationnel, c'est-à-dire sous forme d'une énergie dont le minimum est atteint pour la solution. La modélisation adoptée pour formaliser le problème et obtenir ces énergies peut être déterministe ou stochastique. Il est connu que la première approche est équivalente à la classe paramétrique de la seconde. Ce constat nous a amené à faire le choix de la seconde approche a priori plus générale si l'on se débarrasse de l'hypothèse paramétrique. En contrepartie, il s'agit d'être capable d'exprimer et d'estimer une énergie en fonction des données alors interprétées comme des échantillons d'une variable aléatoire. Ce premier obstacle est classiquement surmonté par l'emploi de méthodes à noyau fixe sur des lois marginales, autrement dit, en supposant les canaux de données indépendants entre eux. Or cet obstacle en cache deux autres : l'inhomogénéité de la répartition des échantillons dans leur espace d'appartenance et leur faible densité dans cet espace. Ces difficultés, ainsi que l'hypothèse d'indépendance mentionnée plus haut, sont d'autant plus pénalisantes que le modèle proposé pour les données est de grande dimension (canaux couleur, mais aussi ajouts d'autres canaux pour prendre en compte les structures locales des images). Au fondement d'estimateurs de mesures statistiques telle que l'entropie, l'idée du kième plus proche voisin permet de résoudre les difficultés évoquées en s'adaptant à la densité locale des données, en considérant les canaux conjointement, et ce quelle que soit leur nombre. Dans ce contexte, nous proposons une approche statistique générale inspirée de la théorie de l'information, dédiée aux approches variationnelles car estimant efficacement des énergies en haute dimension, permettant le calcul de leur dérivée et pouvant estimer localement des probabilités. Ce cadre est appliqué aux trois problèmes de traitement d'images ou de vidéos que sont l'estimation de flot optique, le suivi d'objets vidéos et la segmentation. Ce point de vue, en permettant de limiter sinon de s'affranchir du problème de la dimension des données, autorise la définition de nouvelles mesures et lois de probabilités plus adaptées aux images naturelles. Certains travaux en suivi d'objets et en segmentation ont conduit à des implémentations industrielles.
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Hua, Xiaoben, and Yuxia Yang. "A Fusion Model For Enhancement of Range Images." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2203.
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In this thesis, we would like to present a new way to enhance the “depth map” image which is called as the fusion of depth images. The goal of our thesis is to try to enhance the “depth images” through a fusion of different classification methods. For that, we will use three similar but different methodologies, the Graph-Cut, Super-Pixel and Principal Component Analysis algorithms to solve the enhancement and output of our result. After that, we will compare the effect of the enhancement of our result with the original depth images. This result indicates the effectiveness of our methodology.<br>Room 401, No.56, Lane 21, Yin Gao Road, Shanghai, China
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Han, Ung Bin. "Characterization of chemical markers for the discrimination of East Asian handmade papers using pyrolysis, gas chromatography and mass spectrometry." Thesis, Paris, Muséum national d'histoire naturelle, 2018. http://www.theses.fr/2018MNHN0005/document.
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Cette thèse a été conduite afin d’explorer le potentiel d’une nouvelle méthodologie utilisant la pyrolyse, la chromatographie gazeuse et la spectrométrie de masse pour la caractérisation et l’identification des fibres papetières utilisées dans la fabrication des papiers asiatiques traditionnels à partir de la caractérisation des métabolites de ces fibres. Cette méthodologie utilise un processus d’échantillonnage facilité nécessitant une très petite quantité d’échantillons (de l’ordre de quelques dizaines de µg). Après la pyrolyse des échantillons de papiers et la séparation chromatographique des composés formés, des distributions caractéristiques pour les métabolites des fibres papetières (considérant leur présence et leur intensité) ont été observées dans une région définie comme région d’intérêt dans les chromatogrammes: ces distributions se sont révélées spécifiques pour la caractérisation des papiers fabriqués à partir de différents types de fibres et ont été utilisées pour distinguer l’origine des différentes fibres papetières couramment utilisées dans la fabrication de papiers asiatiques traditionnels. Premièrement, les problèmes rencontrés dans l’étude des papiers faits à la main ont été présentés, comme l’origine de la fabrication du papier, l’incohérence de certains résultats dans l’identification des fibres (reportés dans différentes études scientifiques), les limites de la microscopie pour l’identification des fibres papetières d’origines botaniques similaires et les risques d’imprécision dans le référencement des échantillons. Tous ces problèmes montrent la nécessité d’explorer de nouvelles méthodes pour (1) améliorer la fiabilité de l’identification des fibres papetières des papiers asiatiques traditionnels, (2) valider et confirmer les résultats obtenus par l’analyse microscopique. À cette fin, dans un premier temps, des papiers asiatiques de référence ont été étudiés. Les résultats expérimentaux ont montré que les différentes fibres papetières utilisées pour la fabrication des papiers étudiés montraient des différences dans les distributions de leurs marqueurs spécifiques : par exemple, les fibres d’origine de la famille Moraceae montrent une distribution caractéristiques de composés triterpèniques alors que les fibres d’origine de la famille Thymelaeaceae montrent une distribution caractéristiques de composés de type stigmastanes. De leur côté, les fibres des plantes appartenant au groupe Ma montrent peu de métabolites caractéristiques. Les différences observées dans la distribution de ces métabolites ont été attestées par la comparaison entre distributions obtenues à partir des fibres végétales et celles des papiers faits à la main attestant de l’origine commune de ces métabolites issus des tissus végétaux d’origine. Ainsi, la méthodologie étudiée se révèle prometteuse en tant que méthode de chimiotaxonomie pour l’identification des fibres inconnues de papiers faits à la main. Avec les exemples d'applications fournies au cours du travail expérimental, le couplage de la pyrolyse, de la chromatographie en phase gazeuse et de la spectrométrie de masse (avec l’utilisation de la Py-GC/MS et de la Py-GCxGC/MS) a montré sa capacité à distinguer les fibres d'une même famille (qui peuvent présenter des caractéristiques similaires en microscopie) et peut ainsi constituer une méthode efficace d'identification des fibres et de validation des résultats d'identification obtenus par l'observation microscopique. Dans la présente thèse, les caractéristiques de la chromatographie gazeuse intégralement bidimensionnelle GCxGC, ses avantages pour les applications dans le domaine du patrimoine culturel et son apport potentiel pour le traitement des données 1D ont été discutées (...)<br>This study was conducted to explore a new methodology for handmade fiber characterizationand identification using pyrolysis, gas chromatography and mass spectrometry. It employseasy sampling process with minor quantity of samples required. After pyrolysis of handmadepapers, a featured metabolites distribution patterns (presence plus intensity) eluting in the defined region of interest (ROI) was observed to be characteristic for handmade papers of different material origins. The method utilizes these metabolites distribution patterns as markers to discriminate different fiber origins. Firstly, the problems encountered in the investigation of handmade papers were introduced such as the origin of papermaking, the inconsistency in the fiber identification results sometimes gained by different scholars, the limits of microscopy in identifying fibers from similar species and the likely imprecision of the reference sample labeling. All these problems showed the necessity to explore a new method in order to (i) make precise fiber identification of handmade papers and (ii) to validate or confirm the identification results obtained by microscopy. Then, modern reference handmade papers were firstly studied. The result revealed that different plant fibers used for papermaking have different marker distributions in the ROI, forinstance, the Moraceae family with a featured distribution of terpene compounds and theThymelaeaceae family with a featured distribution of stigmasta compounds. The fibers fromthe ma group usually revealed few compounds in the ROI. This metabolites difference in theROI was attested from the plant tissues with their similar distribution in handmade papers and plant raw fibers. Thus, the chosen methodology offers promise as a method of chemotaxonomy for unknown handmade paper fiber identification. With the examples ofapplications provided during the experimental work, the coupling of pyrolysis, gaschromatography and mass spectrometry (through the use of Py-GC/MS and Py-GCxGC/MS)showed its ability to distinguish fibers from the same plant family (that may present similar microscopic features) and thus, can constitutes an effective method for fiber identification as well as to validate the identification results of the microscopic observation. In the present thesis, the features of GCxGC and the benefits for cultural heritage applications and its help for the ID data treatment were discussed. The tested Py-GCxGC/MS methodology has been for the first time proposed in the cultural heritage field and it harbors the potential to promote the research in this domain, enhancing our capacity to handle small quantities of complex samples while providing an exhaustive response on its composition
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Sun, Yue. "Resonant Solutions to (3+1)-dimensional Bilinear Differential Equations." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6146.
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In this thesis, we attempt to obtain a class of generalized bilinear differential equations in (3+1)-dimensions by Dp-operators with p = 5, which have resonant solutions. We construct resonant solutions by using the linear superposition principle and parameterizations of wave numbers and frequencies. We test different values of p in Maple computations, and generate three classes of generalized bilinear differential equations and their resonant solutions when p = 5.
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Grover, Cathy Lynn. "Inner and outer dimensions of self-esteem : the selectivity principle in older widowed men in good and poor health /." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488191124571035.
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French, Ian Dept of Computer Science Australian Defence Force Academy UNSW. "Visualisation techniques for the computer simulation of bushfires in two dimensions." Awarded by:University of New South Wales - Australian Defence Force Academy. Dept. of Computer Science, 1992. http://handle.unsw.edu.au/1959.4/38721.
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This thesis examines techniques that provide a method of computer visualisation of bushfire spread. Existing techniques studied include, Kourtz & O???Regan, Green???s Contact, Heat Accumulation, Percolation modelling and Huygens??? Principle by Anderson et.al., French, Roberts, Richards. Many of these techniques are extended as part of a comprehensive study into how they perform in a two dimensional reference frame (ie over flat terrain only). New techniques are defined for Percolation Modelling and Huygens??? Principle. Each technique is examined in a series of test cases which include computer simulations with no wind, constant wind, variable wind, variable vegetation (including patchy fuel and two fuels) and where fuel burns out. These test cases provide: (a) an incremental approach to understanding the operation of each technique; (b) a basis for comparison; and (c) verification of correctness of the technique in two dimensions. Several of the techniques are shown, by these test cases, to be equivalent. For instance, the Kourtz & O???Regan technique using a square template is equivalent to the Contact Technique, Site percolation is similar to the Heat Accumulation technique and Template percolation is similar to the Contact Technique. Overall the Huygens??? Principle techniques provide the most accurate simulations of bushfire spread.
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Pötzelberger, Klaus. "The General Quantization Problem for Distributions with Regular Support." Department of Statistics and Mathematics, WU Vienna University of Economics and Business, 1999. http://epub.wu.ac.at/1508/1/document.pdf.
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We study the asymptotic behavior of the quantization error for general information functions and prove results for distributions P with regular support. We characterize the information functions for which the uniform distribution on the set of prototypes converges weakly to P. (author's abstract)<br>Series: Forschungsberichte / Institut für Statistik