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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
191

L’armée de l’air et l’innovation technologique (1945-1966) / The French Air Force and Technological Innovation, 1945-1966

Champonnois, Sylvain 12 October 2012 (has links)
De 1945 à 1966, l’évolution de l’armée de l’air française dépend en grande partie des innovations technologiques. L’objet de la présente thèse est d’expliquer comment elle a été capable, technologiquement et structurellement, de passer d’une situation où elle est jugée désuète à une situation dans laquelle elle se tient en tête du dispositif de défense nationale et se positionne comme la troisième force aérienne mondiale. Nous identifions trois périodes essentielles dans la mutation de son expertise technologique. De 1945 à 1950, elle relève plusieurs défis, à l’image de l’intensification des transferts technologiques, de l’aviation à réaction, dans le contexte naissant de la guerre froide. Pour la période 1951-1958, elle suit un cycle de modernisation accélérée malgré les guerres coloniales, sous l’impulsion de l’aide aide américaine, à l’image du développement de programmes aéronautiques et de l’utilisation de missiles. Enfin, de 1959 à 1966, l’armée de l’air s’adapte aux stratégies et aux armes nouvelles dont le nucléaire. Cette période clé aboutit à l’entrée en service du système d’armes stratégique piloté Mirage IV, dans un environnement marqué par de multiples mutations structurelles et par la sortie du commandement militaire intégré de l’OTAN. / From 1945 to 1966, the evolution of the French Air Force largely depends on technological innovations. The aim of this thesis is to analyze how it became able – both technologically and structurally – to pass from a situation in which it was considered as an old-fashioned entity to the head of the national defense system, thus establishing itself as the third Air Force power. To do so, we identify three essential periods, which illustrate its shift to develop progressively its technological expertise. From 1945 to 1950, it meets several challenges such as technological transfers and jet-powered planes in the early years of the Cold War. From 1951 until 1958, it follows a fast modernization trend in spite of the Colonial Wars, as depicted through the development of aeronautical programs and the use of missiles, in a context of American Help. From 1959 to 1966, the French Air Force then adapts to both nuclear-based weapons and strategies, such as piloted strategic armament systems Mirage IV and structural transfers taken out of the military command integrated by NATO.
192

An operational concept for the transformation of SOF into a fifth service / Operational concept for the transformation of Special Operation Forces into a fifth service

Riga, Christopher N., Mahla, Philip L. 06 1900 (has links)
Approved for public release, distribution is unlimited / This thesis defines the strategic utility of Special Operation Forces (SOF), identifies why SOF only provide limited strategic utility, and presents an operational concept for the reorganization, alignment, and employment of SOF to overcome these shortf alls. The thesis is presented in a deductive manner that argues that SOF were designed for strategic purposes, and leads the reader to conclude that reformation must occur for SOF to provide strategic utility and meet their intent. SOF would be in an optimal position to meet their organizational intent by becoming a fifth armed service within the Department of Defense (DoD). Through the creation of mission-based units and a holistic employment strategy, SOF would become a strategic instrument capability of assisting national decision -makers in blending the elements of national power. Finally, the thesis concludes with additional required areas for research to make this concept become a reality, but that are beyond the scope of this study. / Major, United States Army
193

[en] THE ENVIRONMENTAL EDUCATION AND THE MASTERS AND DOCTORS DEGREE: AN OBSERVATION ON THE POST-GRADUATES PRODUCTION / [pt] A EDUCAÇÃO AMBIENTAL E A PÓS-GRADUAÇÃO: UM OLHAR SOBRE A PRODUÇÃO DISCENTE

LUCIANA E SA ALVES 02 March 2007 (has links)
[pt] A produção acadêmica e científica sobre a Educação Ambiental (EA) no Brasil é grande e significativa. O objetivo deste estudo é realizar uma análise preliminar da produção acadêmica em EA, a partir de uma visão teórica crítica. A EA é qualificada, por alguns autores aqui estudados, como um campo teórico em construção, o que aponta para a importância da realização de balanços periódicos desse conhecimento que podem proporcionar o avanço para a compreensão do campo de estudo e ampliação do acesso à informação. Esta Dissertação é um estudo exploratório, com inspiração metodológica em pesquisas do tipo estado da arte que, além da revisão da literatura pertinente ao seu objeto de estudo, tomou por base três fontes de dados: o Banco de Teses da CAPES, entre 1988 e 2004, o V Congresso Ibero-Americano de Educação Ambiental, de 2006, e 12 Dissertações do Município do Rio de Janeiro, defendidas entre os anos 2000 e 2004. Cada uma destas fontes mereceu tratamento diverso. O Banco de Teses foi apenas apresentado em sua expressão numérica, agrupadas as teses sob diversas categorias: autoria, título, orientador, nível do curso, origem instituc ional, época e área do Curso de que se originou. Criou-se para os trabalhos do Congresso, um outro banco de dados com informações, além da sua origem, relacionadas às áreas de atuação da EA, e à metodologia do estudo apresentado. Finalmente, as 12 Dissertações cariocas analisadas o foram em suas relações com a produção do país, e descritas em seus elementos pré-textuais, textuais e pós-textuais. Destaque especial foi feito em relação aos seus objetivos, à metodologia usada, à bibliografia consultada, ao seu quadro teórico e aos resultados alcançados. Concluiu-se, na presente Dissertação, que, o olhar panorâmico, gerador de dois novos bancos de dados, e o olhar focalizado, que possibilitou melhor compreensão do quadro conceitual em EA de pesquisas realizadas, contribuíram para confirmar as diversas correntes de pensamento presentes no campo da EA, complementando os estudos anteriores, e trazendo novas possibilidades de reflexão. / [en] The academic and scientific production about Environmental Education (EE) in Brazil is large and significant. The aim of this study is to accomplish an introductory analyze of the academic production about EE, concerning a theoretical and critical view. The EE is qualified as a theoretical field in progress by some authors below-mentioned and this is a sign of the importance of a periodic knowledge evaluation to provide both the advance of understanding in this field of study and to amplify the access to information. This Dissertation is an exploratory study, with a methodological inspiration from researches called art state. Besides revising the pertinent literature to its object of study, it is based on three fountains: the CAPES data basis during 1988/2004, the Fifth EE Iberian- American Congress, in 2006 and twelve theses from Rio de Janeiro City, between 2000 and 2004. Each of these fountains deserved a special approach. The CAPES data bank was shown in numbers, the theses were classified according to different categories: author, title, instructor, level of the course, institutional origin, period of time and area of the course they had come from. To the Congress Works, another data bank was created informing not only their origin but the areas where the EE had acted and the employed methodology too. At last, the twelve Dissertations from Rio de Janeiro were analyzed in relation to the production all over the country. They were described including the pre- textual elements, the textual ones and the post-textual ones. A special attention was given to their objectives , the methodology they followed, the bibliography, the theoretical views and the results they reached. In this Dissertation, we came to an evidence: the panoramic observation created two new data banks and the focused observation brought a better comprehension of the EE concepts. Both of them gave a contribution to confirm the various streams of thoughts found in the field of the EE, complemented the previous studies and brought new possibilities of reflection.
194

Desafios ao educador na transição do quinto para o sexto ano nas escolas públicas do Estado de São Paulo: uma proposta de formação

Borges, Renata Sales de Moraes 10 November 2015 (has links)
Made available in DSpace on 2016-04-27T14:48:47Z (GMT). No. of bitstreams: 1 Renata Sales de Moraes Borges.pdf: 588499 bytes, checksum: 8a22db0cd2b4294a11411135e183c879 (MD5) Previous issue date: 2015-11-10 / Secretaria da Educação do Estado de São Paulo / This study discusses the transition of students from the fifth to the sixth grade of elementary school, considering the expectations in relation to this reality, to demonstrate to teachers who work with these groups the need to adopt a professional stance based on a differentiated formation, since this transition can still be characterized by its ruptures and discontinuities in the pedagogical work. In this sense, the research aims to: build a proposal for continuing education, to be developed along the teachers of elementary school II, reflecting on the passage of pupils from the fifth to the sixth grade. And specific objectives: Enumerating the difficulties teachers experience in relationship with the students of the sixth grade; Identify the characteristics of the students, which are desirable for teachers from early years of elementary school II; Reflect on the processes of change necessary for the reconstruction of teacher-student relationships. The investigation was developed in the form of bibliographic and documentary research, and supported in consultation with professors in the sixth year of a school in the State schools, by the application of a questionnaire, to the construction of the proposed continuing education. The research has revealed, throughout the process, that there are several factors that, directly or indirectly, influence the transition from the fifth to the sixth grade, both for students and for teachers who receive them. One aspect, however, stood out among the others: the student is alone in this passage, because it is not understood as a new space in the process of schooling. The children, most of the time, feel and suffer in silence, or defend themselves inappropriately because it is a transition invisible and unknown by their teachers / Este estudo aborda a transição dos alunos do quinto para o sexto ano do ensino fundamental, considerando as expectativas em relação a esta realidade escolar, para demonstrar aos professores que atuam com esses grupos a necessidade de adotar uma postura profissional apoiada em uma formação diferenciada, pois esta transição ainda pode ser caracterizada por suas rupturas e descontinuidades no trabalho pedagógico. Nesse sentido, a pesquisa tem por objetivo geral: construir uma proposta de formação continuada, a ser desenvolvida junto a professores do ensino fundamental II, refletindo sobre a passagem dos alunos do quinto para o sexto ano. E por objetivos específicos: Enumerar as dificuldades que os professores vivenciam na relação com os alunos do sexto ano; Identificar as características dos alunos, que são desejáveis para os professores dos anos iniciais do ensino fundamental II; Refletir sobre os processos de mudança necessários à reconstrução da relação professor-aluno. A investigação foi desenvolvida na forma de pesquisa bibliográfica e documental, e apoiou-se na consulta aos professores do sexto ano de uma escola da rede estadual de ensino, pela aplicação de um questionário, para a construção da proposta de formação continuada. A pesquisa permitiu revelar, ao longo do processo, que vários são os fatores que, diretamente ou indiretamente, influenciam essa transição do quinto para o sexto ano, tanto para os alunos como para os professores que os recebem. Um aspecto, porém se destacou entre os demais: o aluno está sozinho nessa passagem, porque ela não é entendida como um novo espaço no processo de escolarização. As crianças, na maioria das vezes, sentem e sofrem em silêncio, ou se defendem de forma inadequada, porque se trata de uma transição invisível e desconhecida por seus professores
195

Groupes approximatifs en théorie des modèles / Approximate subgroups in Model theory

Massicot, Jean-Cyrille 28 September 2018 (has links)
Une partie symétrique X d'un groupe G est un sous-groupe K-approximatif s'il existe une partie finie E ⊂ G de taille K telle que X2 ⊂ E.X. L'étude combinatoire des groupes approximatifs a grandement bénéficié des apports de la Théorie des Modèles : en 2009, Hrushovski montre qu'une ultralimite de groupes approximatifs finis possède une composante connexe modèle-théorique, donc un quotient localement compact X/H. En appliquant les résultats de Gleason et Yamabe sur le cinquième problème de Hilbert, cela permet de trouver un morphisme vers un groupe de Lie, et d'en déduire des résultats de nilpotence. Cela a permis à Breuillard, Green et Tao de classifier tous les groupes approximatifs finis, en retrouvant un quotient X/H de manière combinatoire. Dans cette thèse, on s'intéresse à la construction d'un sous-groupe H type-définissable et d'indice borné, qui garantit l'existence d'un quotient localement compact. On montre que l'approche combinatoire de Breuillard, Green et Tao peut être vue de cette manière, et on la généralise à tous les groupes approximatifs définissablement moyennables. On montre aussi que si H est type-définissable dans un langage L∗, alors on peut construire un sous-groupe H qui est type-définissable sur un langage réduit L, et toujours d'indice borné. L'existence de H ne dépend donc pas du choix du langage / A symmetric subset X in a group G is a K-approximate subgroup if there exists a finite set E ⊂ G of cardinality K such that X2 ⊂ E.X. The study of approximate subgroups in multiplicative combinatorics experienced a significate advance through the use of model theory. In 2009, Hrushovski showed that an ultralimit of finite approximate subgroups has a model-theoretic connected component, thus a locally compact quotient X/H. Using the results of Gleason and Yamabe about Hilbert’s fifth problem, this allows the construction of a morphism to a Lie group, and deduce some results about nilpotency. This lead to the theorem of Breuillard, Green and Tao classifying all finite approximate subgroups, using a combinatorial construction of the quotient X/H. In this thesis, we are intersested in the conditions needed to construct a type definable subgroup H of bounded index in X. This implies the existence of a locally compact quotient.We show that the combinatorial construction of Breuillard, Green and Tao can be seen in a definable way, and give a generalisation to all definably amenable approximate subgroups. Also, we show that if H is type-definable in a language L∗, then it is possible to construct a subgroup H which is type-definable in a reduct L, still with bounded index. Thus the existence of a subgroup H does not depend on the choice of a base language.
196

Optical and Material Properties of Colloidal Semiconductor Nanocrystals

Huxter, Vanessa 01 March 2010 (has links)
This thesis presents an exploration of the photophysics of colloidal semiconductor nanocrystals using both linear and non-linear optical measurement techniques. These optical methodologies are used to follow population dynamics in both singly and multiply excited nanocrystal systems as well as determine material properties of the ensemble. Topics covered in the thesis include, the identification and characterization of bulk-like nanocrystals, study of the fine structure states of the lowest energy exciton, single and multiexciton population dynamics, acoustic phonon modes, elasticity and surface stress properties of a colloidal ensemble in solution.Through linear spectroscopy, the properties of both quantum confined and bulk-like colloidal semiconductor nanocrystals are compared. The identification of a model system of bulk-like nanocrystals with a non-standard absorption profile serves to resolve an ambiguity in literature concerning their characterization. The remainder of the thesis is focused on the size-dependent properties of quantum confined CdSe colloidal nanocrystals. The population dynamics and material properties of these systems are studied using a nonlinear optical technique called transient grating. A third order transient grating measurement with a cross-polarized configuration, which follows the relaxation within the fine structure levels of the lowest energy exciton state, is demonstrated and used to compare systems with different crystal field splittings. Transient grating experiments performed with specific polarization sequences allow for selective observation of the dynamics amongst nearly degenerate levels at room temperature. Cross-polarized transient grating is also used to observe a quantized acoustic phonon mode in a series of nanocrystal samples. The observation of this mode allows experimental determination of the elasticity and surface stress of the nanocrystal ensemble in solution. The anisotropic origin of the acoustic phonon is discussed using a combination of theoretical analysis, modelling and experimental data. In addition, third- and fifth-order transient grating experiments are used to study exciton and multiexciton population relaxation dynamics. The work presented here spans the optical and material properties of quantum confined and `bulk' nanocrystals. This thesis attempts to illustrate the broad scope of the observed behaviour of colloidal nanocrystal systems and to contribute to a greater understanding of their physical properties.
197

Optical and Material Properties of Colloidal Semiconductor Nanocrystals

Huxter, Vanessa 01 March 2010 (has links)
This thesis presents an exploration of the photophysics of colloidal semiconductor nanocrystals using both linear and non-linear optical measurement techniques. These optical methodologies are used to follow population dynamics in both singly and multiply excited nanocrystal systems as well as determine material properties of the ensemble. Topics covered in the thesis include, the identification and characterization of bulk-like nanocrystals, study of the fine structure states of the lowest energy exciton, single and multiexciton population dynamics, acoustic phonon modes, elasticity and surface stress properties of a colloidal ensemble in solution.Through linear spectroscopy, the properties of both quantum confined and bulk-like colloidal semiconductor nanocrystals are compared. The identification of a model system of bulk-like nanocrystals with a non-standard absorption profile serves to resolve an ambiguity in literature concerning their characterization. The remainder of the thesis is focused on the size-dependent properties of quantum confined CdSe colloidal nanocrystals. The population dynamics and material properties of these systems are studied using a nonlinear optical technique called transient grating. A third order transient grating measurement with a cross-polarized configuration, which follows the relaxation within the fine structure levels of the lowest energy exciton state, is demonstrated and used to compare systems with different crystal field splittings. Transient grating experiments performed with specific polarization sequences allow for selective observation of the dynamics amongst nearly degenerate levels at room temperature. Cross-polarized transient grating is also used to observe a quantized acoustic phonon mode in a series of nanocrystal samples. The observation of this mode allows experimental determination of the elasticity and surface stress of the nanocrystal ensemble in solution. The anisotropic origin of the acoustic phonon is discussed using a combination of theoretical analysis, modelling and experimental data. In addition, third- and fifth-order transient grating experiments are used to study exciton and multiexciton population relaxation dynamics. The work presented here spans the optical and material properties of quantum confined and `bulk' nanocrystals. This thesis attempts to illustrate the broad scope of the observed behaviour of colloidal nanocrystal systems and to contribute to a greater understanding of their physical properties.
198

Energy efficient cloud computing based radio access networks in 5G : design and evaluation of an energy aware 5G cloud radio access networks framework using base station sleeping, cloud computing based workload consolidation and mobile edge computing

Sigwele, Tshiamo January 2017 (has links)
Fifth Generation (5G) cellular networks will experience a thousand-fold increase in data traffic with over 100 billion connected devices by 2020. In order to support this skyrocketing traffic demand, smaller base stations (BSs) are deployed to increase capacity. However, more BSs increase energy consumption which contributes to operational expenditure (OPEX) and CO2 emissions. Also, an introduction of a plethora of 5G applications running in the mobile devices cause a significant amount of energy consumption in the mobile devices. This thesis presents a novel framework for energy efficiency in 5G cloud radio access networks (C-RAN) by leveraging cloud computing technology. Energy efficiency is achieved in three ways; (i) at the radio side of H-C-RAN (Heterogeneous C-RAN), a dynamic BS switching off algorithm is proposed to minimise energy consumption while maintaining Quality of Service (QoS), (ii) in the BS cloud, baseband workload consolidation schemes are proposed based on simulated annealing and genetic algorithms to minimise energy consumption in the cloud, where also advanced fuzzy based admission control with pre-emption is implemented to improve QoS and resource utilisation (iii) at the mobile device side, Mobile Edge Computing (MEC) is used where computer intensive tasks from the mobile device are executed in the MEC server in the cloud. The simulation results show that the proposed framework effectively reduced energy consumption by up to 48% within RAN and 57% in the mobile devices, and improved network energy efficiency by a factor of 10, network throughput by a factor of 2.7 and resource utilisation by 54% while maintaining QoS.
199

L’entourage institutionnel de Georges Pompidou (1962-1974) : institutions, hommes et pratiques / The institutionnal entourage of Georges Pompidou (1962-1974) : institutions, men, practices

Tricaud, Sabrina 16 March 2011 (has links)
Cette recherche porte sur l’entourage institutionnel de Georges Pompidou, Premier ministre d’avril 1962 à juillet 1968, puis président de la République de juin 1969 à son décès le 2 avril 1974. Histoire politique de l’administration, elle étudie l’organisation, la structure, et le fonctionnement des deux institutions coutumières que sont le cabinet du Premier ministre et le Secrétariat général de la présidence de la République sous Georges Pompidou. Elle analyse les évolutions de ces organes sur le temps long et étudie les adaptations apportées par Georges Pompidou en terme de rupture et de continuité. Elle s’interroge notamment sur le poids des héritages gaulliens et sur le rôle de Georges Pompidou dans la stabilisation des institutions de la Ve République. Cette recherche retrace également l’histoire des hommes et des femmes qui ont travaillé à ses cabinets civils et militaires à Matignon puis au Secrétariat général de l’Élysée entre 1962 et 1974. À travers l’étude de leur formation, de leur profil, de leur carrière, elle précise les caractéristiques propres à cet entourage politique et enrichit les travaux sur le personnel politico-administratif au cours des années 1960-1970. Enfin, l’analyse des relations entre Georges Pompidou et son entourage, entre ses collaborateurs et d’autres entourages politiques, pose la délicate question de l’influence de conseillers du Premier ministre puis du chef de l’État sur lui-même, et sur le processus décisionnel. / This research is about the institutionnal entourage of Georges Pompidou during his mandates as a Primer Minister (April 1962-July 1968) and as a President of the French Republic (June 1969-April 2th 1974, when he prematurely died). It focuses on two institutions whose organisation, structure and internal functioning have been empirically shaped : the Prime Minister Cabinet and the Secretary-Generalship of the Presidency. It analyses their long-term evolution and the way Georges Pompidou modified them, from both points of view of rupture and continuity. It interrogates the impact of the gaullist legacy and Pompidou's personal influence regarding the global stabilisation of the Fifth Republic's institutions. This research also aims to depict the history of men and women that worked for Pompidou in its civilian and military cabinets, in Matignon and at the Elysee's Secretary-Generalship between 1962 and 1974. A thorough exploration of their professional background, their profile and career allows us to describe the specificities of this political entourage. Furthermore, it contributes to the understanding of the political and administrative high-level servants during the 1960's and the 1970's. Finally, by analysing the relations between Georges Pompidou and his staff, and between this staff and other political circles, we get onto the sensitive question of influence. This research then tries to assess the influence that the advisors may have exerted on their Prime Minister and President, and on the decision-making process.
200

As chaves para o mundo do quinto imp?rio: as imagens de mundo na hist?ria do futuro do padre Antonio Vieira

Macedo, Gil Eduardo de Albuquerque 05 May 2014 (has links)
Made available in DSpace on 2014-12-17T15:25:22Z (GMT). No. of bitstreams: 1 GilEAM_DISSERT.pdf: 2115445 bytes, checksum: 1e49b5f3c71287ff3c2ed565ccf0e80a (MD5) Previous issue date: 2014-05-05 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Iconic historical figure, Ant?nio Vieira (1608-1697) is regarded as an essential character to the Luso-Brazilian history. Between 1646 and 1667, the priest began writing the History of the Future, the first volume of the celebrated "Clavis Prophetarum , political and theological unity that would leverage the process of spread of Christianity across the globe, recognizing Portugal as forefront and center of all millenarian movement. Them, Jesuit represented the "World" in two metaphors: "theater" and "body" responsible for viewing spaces of abstract Christian truth. Starting from the hermeneutical assumptions of analysis, we investigated the historical relations present in the construction of such representations, by which establish the dialogue between politics, theology and seventeenth-century rhetoric. Therefore, the following study supports the hypothesis that beyond a mere stylistic expressions, spatial metaphors of "World" were formulated by Antonio Vieira as a resource that could sharpen the minds of his readers, engaging words into action, become alive and effective use of rhetoric / Emblem?tica figura hist?rica, Ant?nio Vieira (1608-1697) ? considerado um personagem indispens?vel para a hist?ria luso-brasileira. Entre os anos de 1646 e 1667, o padre iniciou a escrita da Hist?ria do Futuro, primeiro volume da c?lebre Clavis Prophetarum , obra que anunciava o surgimento do Quinto Imp?rio , unidade pol?tico-teol?gica que alavancaria o processo de difus?o do Cristianismo por todo o planeta, reconhecendo Portugal como vanguarda e centro de todo o movimento milenarista. Nelas, o jesu?ta representou o Mundo em duas met?foras: teatro e corpo , espa?os respons?veis pela visualiza??o da abstrata verdade crist?. Partindo dos pressupostos hermen?uticos de an?lise, investigamos as rela??es hist?ricas presentes na constru??o de tais representa??es, por meio das quais estabelecemos o di?logo entre a pol?tica, teologia e ret?rica seiscentista. Portanto, o seguinte estudo defende a hip?tese que para al?m de um mera manifesta??o estil?stica, a espacializa??o do Mundo em met?foras foi formulada por Ant?nio Vieira como recurso em que se pudesse agu?ar os ?nimos de seus leitores, empenhar palavras em a??es, tornar vivo e efetivo o uso de sua ret?rica

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