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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.
141

Confrontations des valeurs culturelles dans le théâtre d'expression somali de Djibouti de 1979 à 1993 / Cultural values confrontations in the Somali-speaking theater of Djibouti (1979-1993)

Mahamoud Hadji Ali, Fatouma 21 December 2017 (has links)
La pratique du théâtre dans les pays de la Corne d’Afrique qui remonte à la seconde guerre mondiale connaît deux phases. Avant les indépendances de deux pays, Djibouti et la Somalie, le théâtre est focalisé sur la lutte politique, depuis la fin de la colonisation, il est consacré aux questions sociétales. Après les indépendances, l’urbanisation massive conduit les populations pastorales en ville, et les met en contact avec d’autres populations de culture différente telles les Afars, les Arabes, les Indiens, les juifs. L’installation en ville est surtout synonyme de rencontre avec l’Occident symbolisé par l’école et la discothèque. Les nouveaux citadins se repartissent en deux groupes, les Traditionalistes et les Modernes qui rejettent la tradition. L’objectif des auteurs qui militent pour le maintien de la tradition consiste à confronter les valeurs des uns et des autres et montre combien l’abandon des vertus traditionnelles condamne la société à la perte de son identité. Après avoir analysé ces valeurs contrastées et évalué les motivations qui les sous-tendent, le but poursuivi par notre étude est d’interroger l’objectif des auteurs. Sont-ils à considérer comme des « réactionnaires » ou bien ont-ils amorcé un débat qui est appelé à se poursuivre ? / Theatre practice in the Horn of Africa countries, which dates as far back as the Second World War, knows two phases. Before the independence of Djibouti and Somalia, theater focused mainly on political struggle, and, since the end of colonisation, it has been devoted to societal questions. After independence, massive urbanization brought pastoral populations into the city thus in contact with other populations of different cultures such as the Afars, the Arabs, the Indians and the Jews. The settlement in towns is mainly synonymous with the encounter with the West symbolised by school and nightclubs.The new city dwellers fall into two groups, Traditionalists and Moderns who reject tradition. The aim of the authors who advocate for the safeguard of tradition consists in confronting the values of the two groups and show how abandoning traditional merits condemns the society to identity loss. Subsequent to the analysis of these contrasting values and evaluating the underlying motivations, the aim of our study is to question the authors' objective. Could they be considered “reactionary” or have they opened a new door to a debate that is called to continue?
142

As formas de pretérito do modo indicativo no Ensino Fundamental II: reflexões e propostas de atividades / The forms of the past tense of the indicative mood in Elementary Education: some reflections and proposal of activities

Pais, Artur Geraldo [UNESP] 25 November 2016 (has links)
Submitted by Artur Geraldo Pais null (arturpop2001@gmail.com) on 2017-01-08T17:40:23Z No. of bitstreams: 1 PAIS_AG_PROFLETRAS_ME_UNESP_ASSIS.pdf: 7915636 bytes, checksum: feabf246e6be076db149ba83eb4fa226 (MD5) / Approved for entry into archive by Juliano Benedito Ferreira (julianoferreira@reitoria.unesp.br) on 2017-01-11T13:37:30Z (GMT) No. of bitstreams: 1 pais_ag_me_assis.pdf: 7915636 bytes, checksum: feabf246e6be076db149ba83eb4fa226 (MD5) / Made available in DSpace on 2017-01-11T13:37:30Z (GMT). No. of bitstreams: 1 pais_ag_me_assis.pdf: 7915636 bytes, checksum: feabf246e6be076db149ba83eb4fa226 (MD5) Previous issue date: 2016-11-25 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Os recentes materiais didáticos destinados à aprendizagem de Língua Portuguesa no Ensino Fundamental II têm procurado desenvolver um trabalho de gramática direcionado aos mais diversos gêneros textuais. No que diz respeito ao ensino dos verbos, particularmente as formas de pretérito do modo indicativo, gêneros como relato de experiência, notícia de jornal, crônica, biografia, entre outros, contemplam o conteúdo das formas de passado no português brasileiro. Entretanto, percebe-se que ainda persiste um mero ensino das características morfológicas desse tempo verbal. Noções de aspecto, modalidade e uso são deixadas em segundo plano, ou simplesmente ignoradas. O Currículo do Estado de São Paulo propõe, com base nos Parâmetros Curriculares Nacionais, que o ensino gramatical seja voltado para o texto em seus mais variados gêneros, e que tenha respaldo na língua em situações de uso real. Por outro lado, os materiais de apoio do Currículo (Caderno do Aluno e Caderno do Professor) não concentram o ensino da gramática a essas situações de uso e acabam seguindo o mesmo padrão adotado pelos livros didáticos, nos quais sequer existem menções a valores aspectuais e modais dos verbos. O objetivo deste trabalho é apresentar os resultados acerca da investigação e análise da abordagem dada às concepções de ensino de língua e aos estudos gramaticais nos materiais de apoio do Currículo do Estado de São Paulo e em alguns livros didáticos de Língua Portuguesa de 6º e 7º anos do Ensino Fundamental, com um recorte dado aos verbos e, particularmente, às formas flexionadas nos tempos do pretérito do modo indicativo no português do Brasil. Considerando os conceitos de tempo e de aspecto verbal e as diferentes perspectivas de abordagem dos tempos de pretérito do modo indicativo na Língua Portuguesa, esta pesquisa, de caráter qualitativo, consiste na análise dos documentos oficiais e dos materiais didáticos utilizados na Educação Básica, e apresenta, como proposta de intervenção, um Caderno Complementar de Atividades para o professor aplicar junto aos alunos do Ensino Fundamental II, com exercícios que contemplem o passado dos verbos em português, dentro de uma perspectiva semântica e funcional, em diferentes gêneros textuais. A presente pesquisa também apresenta uma análise da elaboração do Caderno Complementar e da aplicação das primeiras atividades com alunos do 7º ano de uma escola pública da cidade de Assis, SP. / The newest schoolbooks for the learning of Portuguese language in Elementary Education try to develop a grammar teaching according to various text genres. When the subject is the teaching of verbs, particularly the forms of the past tenses in the indicative mood, text genres like experience report, newspaper report, chronicle, biography, and many others, include the contents of the forms of the verbs in the past in Brazilian Portuguese. However, it is very clear that there is still a mere teaching of the morphological characteristics of this tense. The verbal aspect, the modal verbs and the functions of verbs are not the main topic in the studies, or they are simply ignored. The Currículo do Estado de São Paulo – an official document that indicates the contents to be taught in public schools in São Paulo State – proposes, based on the PCN (Brazilian National Curriculum Parameters), that the grammar teaching must be focused on the text in its several genres, and has to consider the language in real use situations. On the other hand, the Currículo support materials (student’s and teacher’s notebooks) do not consider these situations in the grammar teaching, and the approach follows the same pattern adopted by the textbooks, in which there is not any mention about aspect values or modal verbs. The aim of this work is to present the results on the research and analysis of the approach of the language teaching concepts in the support materials of the Currículo do Estado de São Paulo and in some textbooks of the 6th and the 7th years in elementary school, with the focus on the grammatical studies about the verbs and, particularly, their inflected forms in the past tenses in the indicative mood, in Brazilian Portuguese. Considering the concepts of tense and verbal aspect, and the different perspectives of approach to the past tenses in the indicative mood in Portuguese, this qualitative research analyzes the official documents and the teaching materials used in Elementary Education, and presents, as a proposal of intervention, a Complementary Activities Notebook for the teacher’s work with the elementary school students, with exercises that include the verbs in the past in Portuguese, in a semantic and functional perspective, in different genres. This research also analyzes the development of that Complementary Notebook and the results of implementing its first activities with students in a 7th year at a public school in Assis, São Paulo State.
143

O velho, o novo e a educação em um mundo em transformação: reflexões a partir do pensamento de Hannah Arendt / The old, the new and the education in a transforming world: reflections based on the thoughts of Hannah Arendt

Renata de Oliveira Ferraz 06 March 2017 (has links)
Este trabalho apresenta uma reflexão sobre as relações entre educação, mundo comum, modernidade, natalidade e lembrar no pensamento de Hannah Arendt. A autora aborda o mundo humano como artifício criado por mulheres e homens plurais, por meio da fabricação de obras e da manifestação de atos e palavras. É na esfera pública gerada por este mundo que as pessoas se encontram, revelando suas singularidades e descobrindo-se plurais. A problemática apresentada no pensamento arendtiano, contudo, reside no fato de que a modernidade marca um movimento, de um lado, de constante de esfarelamento das coisas do mundo (mundo deserto), e, de outro, da permanente iminência de revoluções. Assim, a modernidade é um tempo de crises e transformações profundas e aceleradas de tudo o que existe entre nós. Nesse cenário, a educação passa a ser vista como um problema político de primeira grandeza. Compreendida como a forma humana de acolher os mais novos no mundo, a educação se encontra num vácuo: como acolher os mais novos num mundo que não é mais como era antes, mas tampouco é já como será quando as crianças e adolescentes se tornarem adultas? O caminho escolhido por este trabalho para refletir sobre essa pergunta foi o pensamento a partir das categorias apresentadas por Arendt, tecendo possíveis relações entre a educação e um mundo que fica imediatamente velho, e a educação e um mundo que precisa urgentemente de renovação. Nesse sentido, diante de um mundo caduco, cabe à educação despertar um olhar profundo capaz de dar vida às ruínas de nossa república, de nossas cidades, permitindo alguma compreensão diante dos acontecimentos que se amontoam na nossa frente. Quanto ao novo, se cabe à educação preparar os novos para a renovação do mundo, é preciso saber que a responsabilidade pelo mundo e pelas crianças, no presente, é dos adultos, que precisam agir no âmbito da política e fazer escolhas no âmbito da educação. Se a finalidade da educação é a liberdade, num sentido público, ela precisa ser conservadora, pois aos adultos cabe somente apresentar o mundo que conhecem, deixando aberto o caminho do futuro para que as novas gerações realizem aquilo que é impossível de prever. / This study presents a reflection on the connections among education, common world, modernity and remember in Hannah Arendts thought. The author approaches the human world as a human artificiality created by plural men and women through the production of works and the display of acts and words. People meet each other in the public context created by this world, revealing their singularities and finding themselves plural. However, the issue shown in the Arendtian conception lies on the fact that modernity sets apart a movement, on one hand, of constant crumbling of the things of the world (the desert world), and, on the other hand, of permanent imminence of revolutions. Therefore, modernity is a time of crises and deep, swift transformations of everything there is among us. In this context, education begins to be seen as a critical political problem; understood as the human way of sheltering the youth in the world, it is found in a vacuum: how to shelter the youth in a world that is not what it used to be, but nor is at the moment what it will be when children and teenagers become adults? The path chosen by this paper to reflect on such a question was the reasoning based on the categories proposed by Arendt, setting forth possible connections between education and a world that turns old immediately, and education and a world that desperately needs renovation. In a stale world, education has the role of awakening a deep attitude, able to bring life to the ruins of our republic, our cities, allowing some understanding in light of the events that pile up before us. As for the new, if it is the role of education to prepare the youth for the renovation of the world, it is necessary to be aware that the responsibility for the world and the children, at present, belongs to adults, who must act within politics and make choices in education. If the goal of education is freedom, in a public sense, it needs to be conservative because adults shall only present the world they know, leaving the path of future open so that new generations accomplish what is impossible to predict.
144

“Lugares que migram” as imagens do mundo vivido pelos assentados do Canoas em Presidente Figueiredo (AM) / "Places Migrating" images of the world by experienced seated at the President Canoas Figueiredo (AM).

Sacramenta, Diane Maria Oliveira 20 December 2010 (has links)
Made available in DSpace on 2015-04-11T13:57:29Z (GMT). No. of bitstreams: 1 DISSERTACAO DIANE.pdf: 6160976 bytes, checksum: c6ea869232c8f8648fc6e2d066246e5a (MD5) Previous issue date: 2010-12-20 / Fundação de Amparo à Pesquisa do Estado do Amazonas / Canoas is a rural community and a settlement. Its dynamism might be better understood if we consider its two periods: before and after the settlement project (SP). Thus, we aim to describe and comprehend how settled migrants represent their way of life and paths taken, as well as Canoas, developing an identity relationship with it. Ten migrant subjects not from the North region participated in the research due to their background in the migration process. Three old inhabitants also participated in the research to describe their perception upon migrants arrival. Mental maps and oral history help us understand each subjects experience lived upon settlement. It is a qualitative research in phenomenological geography; therefore, it contributes to comprehending and rebuilding the past place in multidimensional views, as well as the relationship in the existing identity or not since it is in the displaying of the relationships that they occur. / O Canoas apresenta-se como Comunidade e Assentamento rural. Sua dinâmica pode se melhor compreendida considerando duas etapas, antes e após a chegada do Projeto de Assentamento (P.A.). Nesse sentido, o objetivo deste trabalho foi descrever e compreender como os migrantes assentados representam suas vivências e os lugares de seus trajetos, bem como o Canoas, criando com ele uma relação de identidade. Participaram da pesquisa dez colaboradores adultos, não naturais da região norte, devido às experiências adquiridas na migração, e três dos antigos habitantes do lugar, demonstrando a percepção sobre a chegada desses novos sujeitos. Os mapas mentais e a história oral nos auxiliaram no acesso ao mundo vivido de cada indivíduo. Trata-se de uma pesquisa qualitativa, na perspectiva fenomenológica da Geografia. Portanto, esta pesquisa contribui na compreensão da (re) construção do lugar nas multidimensionalidades do vivido, bem como, da relação de identidade existente, ou não, pois é a partir da manifestação das relações estabelecidas que o mesmo acontece.
145

Imperfective periphrasis of past and of imperfect of indicative tense in short stories by Spanish writers: a sociofunctional perspective / O pretÃrito imperfeito do indicativo e as perÃfrases imperfectivas de passado em contos literÃrios escritos em espanhol: um estudo sociofuncionalista

Valdecy de Oliveira Pontes 14 May 2012 (has links)
This dissertation studied the multifunctionality in a sociofunctional perspective of the imperfective past in the Spanish language in the contexts of use of imperfective periphrasis of past and of imperfect of indicative tense. It was also investigated the variation among these forms in the descriptive, habitual, desiderative and narrative functions. The objectives of the research were: a) to map out the encoded functions by the imperfective aspectual forms of past (imperfect of indicative tense and verbal periphrases) in literary short stories written in Spanish; b) to describe the phenomenon of linguistic variation in the functions performed by imperfective aspectual forms of past; c) to examine linguistic and extra-linguistic contexts, prototypical to each function and the factors that constrained the analyzed forms. As theoretical backgrounds, we used principles of Sociofunctionalism by Tavares (2003), as a result of a theoretical connection of the North American approach Linguistic Functionalism (HOPPER; TRAUGOTT, 1993; GIVÃN, 1995), and some assumptions of the Theory of Change and Variation (LABOV, 1972, 1978, 1994 and 2001). The research analyzed data of written language from 24 short stories by Spanish writers, selected based on extra-linguistic parameters (the linguistic zone of Spanish, the narratives and the writers). The results were the following: from 2093 cases, 1803 are in the imperfect past tense of indicative, 86,15% of the total, and 290 in imperfective periphrasis of past in Spanish, which is 13,85% of the total. These data were analyzed according to parameters of transitivity by Hopper and Thompson (1980); types of verbs by Vendler (1957,1967); types of aspectual modifiers; the foreground and background relationship by Hopper e Thompson (1980); narrative unities by Labov (1972); types of discourse; linguistic zones; short stories and selected writers; types of report and voices of the literary narrative. In addition to that, functions were mapped out, and those, which had variation, it was investigated linguistic and extra-linguistic factors, which influenced the use of variants, by subjecting these data to a statistical analysis through the computer program GOLDVARB. Concerning the multifunctionality of imperfective forms of past, it was found, in our research, the following results: descriptive (33,84%), narrative (32,07%), habitual (6%), interactive (1,53%), present (3,07%), future (1,53%), simultaneity (3,07%), courtesy (0,28%), desiderative (8,08%), contrariety (1,53%) and playful (9%). In four of these functions, the analyzed forms vary (according to Labovâs concept, 1978). The imperfect tense is more frequent in the descriptive function (constrained by the presence of two or more arguments in the sentence, discursive level background 2, object not affected by the verbal action, the style of the writers Virgilio PiÃera and Roberto BolaÃo, the absence of volitivity, and dynamic and durative verbs), and in the narrative one (constrained by modality irrealis, discursive level foreground, object not affected by the verbal action, dynamic verbs, sentences whose polarity is negative, and the evaluation of the narrative. Periphrases occur more frequently in the desiderative function (motivated by the absence of agentive subject and of individuated object in the sentence, discursive levels background 1 and 2, and durative verbs), and in the habitual function (motivated by agentive subject, the style of the writers Gabriel GarcÃa MÃrquez and Virgilio PiÃera, dynamic and durative verbs and the presence of the aspectual modifier. / Esta tese deteve-se no estudo da multifuncionalidade, numa perspectiva sociofuncionalista, do passado imperfectivo em LÃngua Espanhola, em contextos de uso das perÃfrases imperfectivas de passado e do pretÃrito imperfeito do indicativo. Investigou, ainda, a variaÃÃo entre essas formas nas funÃÃes descritiva, habitual, desiderativa e narrativa. Os objetivos que nortearam a nossa pesquisa foram: a) mapear as funÃÃes codificadas pelas formas aspectuais imperfectivas de passado (pretÃrito imperfeito do indicativo e perÃfrases verbais) em contos literÃrios escritos em Espanhol; b) descrever o fenÃmeno de variaÃÃo linguÃstica nas funÃÃes desempenhadas pelas formas aspectuais imperfectivas de passado e c) examinar contextos linguÃsticos e extralinguÃsticos prototÃpicos a cada funÃÃo e fatores que condicionam as formas sob anÃlise. Deram suporte a nossa pesquisa os pressupostos teÃricos do Sociofuncionalismo, de acordo com Tavares (2003), resultado do casamento teÃrico do Funcionalismo LinguÃstico de vertente norte-americana (HOPPER; TRAUGOTT, 1993; GIVÃN, 1995) e dos postulados da Teoria da VariaÃÃo e MudanÃa (LABOV, 1972, 1978, 1994 e 2001). A pesquisa analisou dados de lÃngua escrita provenientes de 24 contos literÃrios escritos por autores de LÃngua Espanhola, selecionados a partir de parÃmetros extralinguÃsticos (zona linguÃstica do Espanhol, narrativas e autores). Obtivemos um total de 2093 dados, sendo que 1803 desses sÃo de formas do pretÃrito imperfeito do indicativo, 86,15% do total, e 290 de perÃfrases imperfectivas de passado em Espanhol, o que corresponde a 13,85% do total. Esses dados foram analisados conforme os parÃmetros de transitividade, de acordo com Hopper e Thompson (1980); tipos de verbo, conforme Vendler (1957,1967); tipos de modificadores aspectuais; relaÃÃo figura e fundo, conforme Hopper e Thompson (1980); unidades da narrativa, segundo Labov (1972); tipos de discurso; zonas linguÃsticas; contos e autores selecionados; tipos de relato e vozes da narrativa literÃria. Ademais, foi realizado o mapeamento funcional e, nas funÃÃes em que houve variaÃÃo, investigamos fatores linguÃsticos e extralinguÃsticos que condicionaram o uso das variantes, submetendo esses dados a tratamento estatÃstico atravÃs do pacote computacional GOLDVARB. No que tange à multifuncionalidade das formas imperfectivas de passado, encontramos, em nossa pesquisa, os valores descritivo (33,84%), narrativo (32,07%), habitual (6%), iterativo (1,53%), presente (3,07%), futuro (1,53%), simultaneidade (3,07%), cortesia (0,28%), desiderativo (8,08%), contrariedade (1,53%) e lÃdico (9%). Dessas funÃÃes, em quatro, as formas sob anÃlise estÃo em variaÃÃo (de acordo com conceito proposto por Labov, 1978). O imperfeito à mais frequente na funÃÃo descritiva (condicionado por presenÃa de dois ou mais argumentos na oraÃÃo, plano discursivo fundo 2, objeto nÃo afetado pela aÃÃo verbal, estilo dos autores Virgilio PiÃera e Roberto BolaÃo, ausÃncia de volitividade e verbos dinÃmicos e durativos) e na funÃÃo narrativa (condicionado por modalidade irrealis, plano discursivo figura, objeto nÃo afetado pela aÃÃo verbal, verbos dinÃmicos, sentenÃas cuja polaridade à negativa e avaliaÃÃo da narrativa). As perÃfrases ocorrem, mais frequentemente na funÃÃo desiderativa (motivadas por ausÃncia de sujeito agentivo e de objeto individuado na oraÃÃo, plano discursivo fundo [1 e 2] e verbos durativos) e na funÃÃo habitual (motivadas por sujeito agentivo, estilo dos autores Gabriel GarcÃa MÃrquez e Virgilio PiÃera, verbos dinÃmicos e durativos e presenÃa de modificador aspectual).
146

A Note on Perfect Slice Sampling

Hörmann, Wolfgang, Leydold, Josef January 2006 (has links) (PDF)
Perfect slice sampling is a method to turn Markov Chain Monte Carlo (MCMC) samplers into exact generators for independent random variates. We show that the simplest version of the perfect slice sampler suggested in the literature does not always sample from the target distribution. (author's abstract) / Series: Research Report Series / Department of Statistics and Mathematics
147

La subordonnée participiale au participe passé en Français : de la phrase au discours / Participial subordinate clause : from sentence to discourse

Abdoulhamid, Ali 10 February 2009 (has links)
L’intégration du contexte dans l’analyse de la subordonnée participiale au participe passé permet d’établir plusieurs catégories de cette construction, selon qu’elle est employée seule, qu’elle contient un marqueur temporel ou l’auxiliaire étant. Lorsqu’elle n’a pas ces éléments, la construction est toujours en relation de coréférence événementielle avec son contexte d’apparition. Elle est toujours composée de verbe résultatif, borné à gauche et à droite, et est séparée de la proposition qui l’héberge par un intervalle. Deux types de constructions participiales se dégagent de cette catégorie. La première n’apporte aucune information nouvelle dans le discours. Elle indique une Généralisation du contexte antérieur et est en relation de Consécutivité avec la proposition qui l’héberge. Elle peut être un connecteur ou un introducteur de cadre temporel. La seconde est rhématique par l’aspect de son procès. C’est une Particularisation du contexte antérieur qui est souvent en relation de Narration avec la PH. La construction qui contient un marqueur temporel se rapproche de celle qui n’en a pas dans plusieurs aspects. Mais elle diffère de celle-ci parce que le marqueur peut servir à conférer au participe le caractère résultatif s’il n’en a pas, ou une autonomie syntaxique. En ce qui concerne celle qui est composée de l’auxiliaire étant, elle se distingue des deux autres dans plusieurs angles. D’abord, si elle est contextuelle, son procès est souvent distinct de celui de son contexte d’apparition. Ensuite, théoriquement, elle peut contenir n’importe quel participe passé, avec un procès borné seulement à droite, mais pas à gauche. Enfin, elle entretient avec ce contexte et avec la proposition qui l’héberge plusieurs types de relations de discours qu’on ne peut avoir avec les autres types de subordonnées participiales. / The typology of French subordinate participial clauses studied here is grounded in their context, which is shown to partially determine their distribution (‘pure’ or naked, introduced by a temporal adverbial, or yet containing the auxiliary étant ‘being’). When naked, the clause always entertains a relationship of coreference with the events denoted in the preceding context, and its verb is resultative, yielding a temporal interval between the two eventualities. In some cases, the participial clause does not introduce any new information : it simply generalises the contents of the (not necessarily immediately) preceding sentence, indicates that the main clause is consequent upon it, and functions like a discursive connective or a pure temporal adjunct. In other cases, it is rhematic, at least in so far has it provides aspectual specifications, and thus play anundeniable narrative rôle. When a temporal expression (une fois, sitôt…) introduces the clause, the semantic value of the participle is also specified, and the clause acquires a form of syntactic autonomy it does not have otherwise. Finally, when the auxiliary étant occurs, the subordinate clause can denote a hitherto unknown eventuality, whose aspectual properties are distinct from the aforementioned cases ; in particular, reference is only made to the end point, never to the beginning of the action thus described. This third type of participial clause is also shown to entertain textual and/or discursive relations with the context that are crucially different from the other types.
148

Past pro studium rozptylu světla na prachových zrnech / Dust trap for light scattering study

Bartoň, Petr January 2017 (has links)
Title: Dust trap for light scattering study Author: Petr Bartoň Department: Department of Surface and Plasma Science Supervisor: doc. RNDr. Jiří Pavlů, Ph.D., Department of Surface and Plasma Science Abstract: Light scattering on small grains is common interaction occurring wi- dely in space environments, including Moon surface, dusty nebulas or even the upper atmosphere of the Earth. For experimental measurements of light scatte- ring intensity profiles, we designed and constructed a unique experiment. Using so called acoustic trapping, we are able to capture a single dust grain (or small water droplet) in midair, to irradiate it with the laser beam, and to observe scattered light directly with the photodiode mounted on a precise goniometer. In the thesis, we present not only construction details, but also the first results, which help us to evaluate abilities of the experiment, and provide useful recommendations for further development of all dust-related experiments. Keywords: light scattering, acoustic trap, dust grain, scattering measurement 1
149

Investigating the Determinants of Recycling Behavior in Youth by Using Theory of Planned Behavior.

Gadiraju, Tejaswini 24 March 2016 (has links)
The aim of this study is to understand the determinants that influence the youth recycling behavior intention. In other words, this study wants to know the motivations and barriers behind university students’ recycling behavior. The Theory of Planned Behavior (TPB), which provides a theoretical framework for systematically identifying the determinants of recycling behavior, is the basis for this study. Along with the TPB variables, additional predictor variables (moral norm, past experience, knowledge of how and what to recycle, knowledge of consequences, and inconvenience) that can influence behavior intentions were tested in the study. Online survey was used to collect the required information and the sample consists of 172 students from University of South Florida. The findings suggest that past recycling experience is the major contributor to recycling behavior. Moral norm, knowledge of how and what to recycle and knowledge of consequences are also significant predictors of recycling behavior. In other words, students are more likely to form the intention to recycle, when they have prior experience with recycling on campus, if they personally feel recycling is the right thing to do, when they have appropriate knowledge of recycling and when they are aware of consequences of recycling. Recommendations to promote recycling behavior among students are discussed in this study.
150

Coupled Thermo-Hydro-Mechanical-Chemical (THMC) Responses of Ontario’s Host Sedimentary Rocks for Nuclear Waste Repositories to Past and Future Glaciations and Deglaciations

Nasir, Othman January 2013 (has links)
Glaciation is considered one of the main natural processes that can have a significant impact on the long term performance of DGRs. The northern part of the American continent has been subjected to a series of strong glaciation and deglaciation events over the past million years. Glacial cycles cause loading and unloading, temperature changes and hydraulic head changes at the ground surface. These changes can be classified as transient boundary conditions. It is widely accepted that the periodic pattern of past glacial cycles during the Late Quaternary period are resultant of the Earth’s orbital geometry changes that is expected to continue in the future. Therefore, from the safety perspective of DGRs, such probable events need to be taken into account. The objective of this thesis is to develop a numerical model to investigate the thermo-hydro-mechanical-chemical (THMC) coupled processes that have resulted from long term past and future climate changes and glaciation cycles on a proposed DGR in sedimentary rocks in southern Ontario. The first application is done on a large geological cross section that includes the entire Michigan basin by using a hydro-mechanical (HM) coupled process. The results are compared with field data of anomalous pore water pressures from deep boreholes in sedimentary rocks of southern Ontario. In this work. The modeling results seem to support the hypothesis that at least the underpressures in the Ordovician formation could be partially attributed to past glaciation. The second application is made on site conditions by using the THMC model. The results for the pore water pressure, tracer profiles, permafrost depth and effective stress profile are compared with the available field data, the results show that the solute transport in the natural limestone and shale barrier formations is controlled by diffusion, which provide evidence that the main mechanism of transport at depth is diffusion-dominant. The third application is made on site conditions to determine the effect of underground changes in DGRs due to DGR construction. The results show that future glaciation loads will induce larger increases in effective stresses on the shaft. Furthermore, it is found that hypothetical nuclide transport in a failed shaft can be controlled by diffusion and advection. The simulation results show that the solute transported in a failed shaft can reach the shallow bedrock groundwater zone. These results might imply that a failed shaft will substantially lose its effectiveness as a barrier. The fourth application is proposed to investigate the geochemical evolution of sedimentary host rock in a near field scale. In this part, a new thermo-hydro-mechanical-geochemical simulator (COMSOL-PHREEQC) is developed. It is anticipated that there will be a geochemical reaction within the host rock that results from interaction with the water enriched with the CO2 generated by nuclear waste.

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