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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.
41

Uma atraente esposa brasileira ou seu dinheiro de volta: uma análise de agências de casamento especializadas em unir mulheres brasileiras a homens alemães / An attractive Brazilian wife or your money back: an analysis of introduction agencies specialized in uniting Brazilian women to German men

Thais Henriques Tiriba 08 December 2016 (has links)
Essa dissertação de mestrado tem por objetivo perscrutar os valores atribuídos a relacionamentos afetivosexuais que se estabelecem através da mediação de sites de relacionamentos e agências de casamento entre homens do chamado primeiro mundo e mulheres do chamado terceiro mundo. Em particular, relacionamentos entre homens alemães e mulheres brasileiras. Tendo como pano de fundo as dinâmicas históricas e sociais que tornam relacionamentos desse tipo não apenas possíveis, mas também desejáveis, objetivo iluminar de que maneiras tais dinâmicas estariam implicadas na produção e reprodução do desejo e de interações tidas como íntimas, bem como essas dinâmicas mobilizariam noções de sexualidade e raça. Procuro, ademais, localizar o lugar ocupado pelas brasileiras nesse mercado internacional de fluxos matrimoniais e agências de casamento. Investigo ainda as motivações pessoais de indivíduos que fazem uso dessa forma de se buscar um/a parceiro/a compatível e questiono como relações mais amplas relativas a desigualdades de poder, gênero, raça e nacionalidade são pensadas nos processos de estabelecimento desses relacionamentos. / This dissertation aims to scrutinize the values attributed to affectivesexual relationships that are established through the mediation of dating websites and introduction agencies between men from the socalled \"first world\" and women from the socalled \"third world\". In particular, relationships between German men and Brazilian women. Taking in consideration the historical and social dynamics that make such relationships not only possible, but also desirable, I aim to shed light into how such dynamics are implicated in the production and reproduction of desire and of intimate interactions, as well as how such dynamics mobilize notions of race and sexuality. Furthermore, I seek to find the place occupied by Brazilian women in the market of international marriage flows and marriage agencies. I also investigate the personal motivations of individuals who make usage of these tools to find a suitable partner and question how wider power, gender, race and nationality inequalities are thought through in the processes of establishing these relationships.
42

Mobilités urbaines et inégalités : le cas des personnes âgées des quartiers populaires de Recife (Brésil) / Urban mobilities and disparities : the case of the elderly of the popular districts of Recife (Brazil)

Quiroga, Pamela 10 December 2014 (has links)
Dans un contexte fortement ségrégué, l’étude des pratiques résidentielles et des mobilités quotidiennes laisse transparaitre des inégalités importantes entre individus et permet d’appréhender les différentes contraintes auxquelles se confrontent les habitants. L’analyse des inégalités de mobilité dans la ville de Recife, qui a été centrée sur les personnes âgées des quartiers populaires afin d’atténuer les effets majeurs de la hiérarchie sociale, soulève le rôle important des caractéristiques du lieu de résidence, de l’étendue des réseaux sociaux ou encore de l’état de santé des habitants dans la réalisation de pratiques différentiées sur le territoire. A travers une enquête par entretiens menée dans trois zones pauvres de la ville (Brasilit, Cordeiro et Vila Arraes) la thèse propose ainsi de mettre en lien les pratiques résidentielles, lesmobilités quotidiennes et les stratégies des habitants afin de mieux comprendre les inégalités observées. Les résultats de la recherche indiquent une tendance aux faibles mobilités des aînés notamment en raison des contraintes éprouvées au quotidien mais aussi en raison d’une volonté à limiter les déplacements contraignants et à réduire les mobilités quotidiennes. Ce dernier constat a progressivement orienté notre étude vers l’analyse des formes d’ « immobilité » sur le lieu de résidence en tentant de saisir les enjeux de ces pratiques sur les conditions de vie des habitants. / In a highly segregated context, the study of residential practices and daily mobility point significant inequalities between individuals and allows to understand the various constraints people are facing. The analysis of inequalities mobility in the city of Recife, centred on elderly people who lives in popular neighbourhoods to mitigate significant effects of social hierarchy, raises the main characteristics of the place of residence of the extent of social or state of health of the people in achieving differentiated practices in the territory networks. Using interviews survey conducted in three poor areas of the city (Brasilit, Cordeiro and Vila Arraes), the thesis proposes to link residential practices, daily mobility and strategies of people to better understand the observed inequalities. The results shows a trend to low mobility of elderly people in particular because of the constraints encountered in everyday life. This trend is explained by desire to limit the constrained mobilities and reduce the daily mobility. This finding gradually leads to focus our study on analysing the forms of ‘immobility’ in the place of residence while trying to understand the issues of these practices on the lives of residents. / Num contexto altamente segregado, o estudo das mobilidades residenciais e quotidianas revela desigualdades significativas entre os indivíduos e permite identificar as dificuldades de cada pessoa. A análise das desigualdades de mobilidade na cidade de Recife, com foco na população idosa das áreas pobres da cidade para atenuar os efeitos da hierarquia social, aponta a importância das características do lugar de residência, das redes sociais ou ainda da saúde dos habitantes no desenvolvimento de práticas diferenciadas no espaço urbano. A pesquisa realizada em três áreas pobres da cidade (Brasilit, Cordeiro e Vila Arraes) propõe articular as práticas residenciais com as mobilidades quotidianas e as estratégias dos habitantes para assim compreender as desigualdades observadas nessa escala. Os resultados da pesquisa indicam uma tendência de baixa mobilidade dos idosos, especialmente por causa das dificuldades encontradas no cotidiano, mas também por causa de uma vontade de limitar os deslocamentos constrangedores e reduzir a mobilidade diária. Esta última observação tem focado progressivamente nosso estudo na análise das formas de "imobilidade" tentando apreender os rebatimentos dessas práticas nas condições de vida dos habitantes.
43

How Yoga Became “White:” Yoga Mobilities, Race, and the U.S. Settler Nation (1937-2018)

January 2019 (has links)
abstract: My Critical Yoga Studies investigation maps from the early 20th century to present day how yoga has become white through U.S. law and cultural productions, and has enhanced white privilege at the expense of Indian and people of color bodies. I position Critical Yoga Studies at the intersection of Yoga Studies, Critical Race Theory, Indigenous Studies, Mobilities Studies, and transnational American Studies. Scholars have linked uneven development and racial displacement (Soja, 1989; Harvey, 2006; Gilmore, 2007). How does racist displacement appear in historic and current contexts of development in yoga? In my dissertation, I use yoga mobilities to explain ongoing movements of Indigenous knowledge and wealth from former colonies, and contemporary “Indian” bodies, into the white, U.S. settler nation-state, economy, culture, and body. The mobilities trope provides rich conceptual ground for yoga study, because commodified yoga anchors in corporal movement, sets billions of dollars of global wealth in motion, shapes culture, and fuels complex legal and nation building maneuvers by the U.S. settler state and post-colonial India. Emerging discussions of commodified yoga typically do not consider race and colonialism. I fill these gaps with critical race and Indigenous Studies investigations of yoga mobilities in contested territories, triangulating data through three research sites: (1) U.S. Copyright law (1937-2015): I chart a 14,000% rise in U.S. yoga copyrights over a century of white hoarding through archival study in Copyright Public Records Reading Room, Library of Congress; (2) U.S. popular culture/music (1941-1967): I analyze twentieth-century popular song to illustrate how racist tropes of the Indian yogi joined yoga’s entry into U.S. popular culture, with material consequences; (3) Kerala, India, branded as India’s wellness tourism destination (2018): I engage participant-observation and interviews with workers in yoga tourism hubs to document patterns of racialized, uneven access to yoga. I find legal regimes facilitate extraction and displacement; cultural productions materially segregate and exclude; and yoga tourism is a node of racist capitalism that privileges white, settler mobility at the expense of Indian people, land, culture. / Dissertation/Thesis / Doctoral Dissertation Justice Studies 2019
44

Theoretical description of charge-transport and charge-generation parameters in single-component and bimolecular charge-transfer organic semiconductors

Fonari, Alexandr 07 January 2016 (has links)
In this dissertation, we employ a number of computational methods, including Ab Initio, Density Functional Theory, and Molecular Dynamics simulations to investigate key microscopic parameters that govern charge-transport and charge-generation in single-component and bimolecular charge-transfer organic semiconductors. First, electronic (transfer integrals, bandwidths, effective masses) and electron-phonon couplings of single-component organic semiconductors are discussed. In particular, we evaluate microscopic charge-transport parameters in a series of nonlinear acenes with extended pi-conjugated cores. Our studies suggest that high charge-carrier mobilities are expected in these materials, since large electronic couplings are obtained and the formation of self-localized polarons due to local and nonlocal electron-phonon couplings is unlikely. Next, we evaluate charge detrapping due to interaction with intra-molecular crystal vibrations in order to explain changes in experimentally measured electric conductivity generated by pulse excitations in the IR region of a photoresistor based on pentacene/C60 thin film. Here, we directly relate the nonlocal electron-phonon coupling constants with variations in photoconductivity. In terms of charge-generation from an excited manifold, we evaluate the modulation of the state couplings between singlet and triplet excited states due to crystal vibrations, in order to understand the effect of lattice vibrations on singlet fission in tetracene crystal. We find that the state coupling between localized singlet and correlated triplet states is much more strongly affected by the dynamical disorder due to lattice vibrations than the coupling between the charge-transfer singlet and triplet states. Next, the impact of Hartree-Fock exchange in the description of transport properties in crystalline organic semiconductors is discussed. Depending on the nature of the electronic coupling, transfer integrals and bandwidths can show a significant increase as a function of the amount of the Hartree-Fock exchange included in the functional. Similar trend is observed for lattice relaxation energy. It is also shown that the ratio between electronic coupling and lattice relaxation energy is practically independent of the amount of the Hartree-Fock exchange, making this quantity a good candidate for incorporation into tight-binding transport models. We also demonstrate that it is possible to find an amount of the Hartree-Fock exchange that recovers (quasi-particle) band structure obtained from a highly accurate G0W0 approach. Finally, a microscopic understanding of a phase transition in charge-carrier mobility from temperature independent to thermally activated in stilbene-tetrafluoro-tetracyanoquinodimethane crystal is provided.
45

Gender and Social Practices in Migration : A case study of Thai women in rural Sweden

Webster, Natasha Alexandra January 2016 (has links)
Set within discussions of gender, migration and social practices, this thesis explores the ways in which Thai women migrants to Sweden build connections between rural areas through their daily activities. Arriving in Sweden primarily through marriage ties, Thai women migrants are more likely to live in Swedish rural areas than in urban areas. Rural areas are typically not seen as a site of globalization or as receivers of international migrants. In contrast to these perceptions, the case of Thai women migrants in the Swedish countryside reveals a complex and vigorous set of social practices that connect rural Sweden across spatial and temporal scales. The aim of this study is to explore the ways in which Thai migrant women construct and implement social practices spatially and temporally. Drawing on the life stories of 16 Thai women living in Sweden, along with other sources of empirical data analysed within feminist epistemologies, this thesis discusses: In what ways does gender shape migrant social practices? How are social practices constructed within individual migrant micro-geographies? By what means are migrant social practices contextualized by spaces and places? Thai women migrants are gendered agents of these social practices and are utilizing specific resources, objects and networks to bridge the distances found in their daily lives. The empirical material examined in this thesis points to the importance of women’s everyday social practices in connecting and linking rural areas globally at different spatial and temporal scales. The results highlight the importance of a translocalism perspective to understanding gendered social practices. This study adds to the translocal discussion by demonstrating that social practices are embedded in multiple geographic sites and scales. Thai women migrants, in this study, emerge as significant actors in global countrysides and do the functional work of bringing spaces and places together daily and through their life course. This thesis consists of an introductory chapter and five papers. The introductory chapter outlines the context and theoretical approaches to understanding Thai migration flows to Sweden. The papers share an emphasis on local sites: homes, workplaces and community. They examine different ways that women construct and build social practices – for example, through food, community projects and in developing their businesses. / <p>At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Manuscript. Paper 4: Submitted. Paper 5: Submitted.</p>
46

Capital and development in social and cultural contexts : an empirical investigation on transport infrastructure development and female labour force in Turkey

Akyelken, Nihan January 2011 (has links)
Non-economic factors like culture and politics, as well as the socio-economic background, matter significantly in directing economic development endeavours towards social wellbeing. Therefore, the current narrow definition of economic development must be extended to include overall wellbeing. As one of the primary forms of physical capital constituting a regional economy, transport investments have played a significant role in development plans. Given that accessibility to social infrastructure is a basic need, certain levels of infrastructure are essential. How these investments have an impact on different groups of individuals has kept many scholars busy for a long time. However, the economic spillover effects of these investments into female labour markets have remained largely unexplored. Situating the implications of development initiatives, including transport investments, for female labour markets in social and cultural contexts requires an integrated view of the regional economy. Although economic geography and existing development theories provide extensive conceptual models to elucidate the links between transport, labour markets and culture, the methodological implications are obscure; hence, the empirical evidence remains weak. This thesis explores the economic and non-economic dynamics of regional economies to clarify the links between transport infrastructure, labour markets, and social and cultural conditions. In particular, the association between female labour forces and development efforts, in the form of transport infrastructure development, is conceptually and empirically examined. This thesis conducts a case study on Turkey. With the extensive infrastructure investment that has been made since 2002 and the extremely low rates of female labour force participation (around 25%), compared to EU-15 and OECD averages of around 65%, Turkey serves as an illuminating case. Theoretically, the study shows that the focus of transport economics on the economic growth effect of investments is not consistent with current efforts to extend economic development objectives: transport research requires a broader view to assess its development implications. The study demonstrates how the interactions between the economic, physical, political, cultural and socio-economic attributes of regions significantly affect how individuals benefit from the investments. The overarching policy implications of the study are useful for regional development policy with a gender focus: complementary policy interventions in human capital development and the consideration of social and cultural attitudes should strengthen the positive impacts of physical investments on female labour markets.
47

Virtual (dis) connectivities : mobile intimacy and presence for women in long distance relationships

Habib, Dania 12 1900 (has links)
Nous vivons dans une époque où la mobilité internationale est une pratique très courante; ainsi, de plus en plus de partenaires doivent maintenir leurs relations à distance. Le phénomène va de pair avec le développement des nouvelles technologies, qui introduisent de nouvelles formes et de pratiques pour maintenir l’intimité. Cela soulève des questions sur les pratiques de connexion (ou déconnexion) lorsque les couples sont séparés par la distance et le temps. Ce mémoire propose d’explorer comment les femmes dans des relations amoureuses à distance utilisent divers modes d’expression (visuels, textuels, oraux et tactiles) ainsi que plusieurs sens à travers de multiples technologies mobiles, qui lui permettent de reconstruire la présence et l’intimité avec l’autre. Inspiré par le new mobilities paradigm (Sheller & Urry, 2006), ainsi que les concepts de mobile intimacy (Hjorth & Lim, 2012; Elliott & Urry, 2010) et la présence imaginée (Chayko, 2002; Elliott & Urry, 2010), je propose les notions de (dé) connectivité virtuelle, le lieu virtuel, ainsi que la présence/absence technologique. Utilisant une approche méthodologique mixte, venant des données d’entrevues semi-dirigées, de l’autoethnographie, de la recherche création et de journaux de bord multimédias, certaines pratiques de contrôle et de surveillance, des formes émergentes de travail, l’immédiateté et la réciprocité émergent dans une époque d’interconnectivité. / Globally speaking, an increasing amount of people are on the move for many reasons; whether for work, studies, travel, emigration or exile (Elliott and Urry, 2010). These movements, or lack thereof, along with the development of communication technologies raise important questions around the ways people are able to connect, as well as disconnect, when they are apart. This thesis aims to understand women’s perspectives and practices of intimacy and presence with their partners when they are separated by distance for extended periods of time. This thesis examines various practices of connection, through old and new technologies (mobile technologies), as well as the bodily senses that participate in intimacy and a sense of presence. Informed by the new mobilities paradigm (Sheller & Urry, 2006) as well as the emerging literature on mobile intimacy (Hjorth & Lim, 2012; Elliott & Urry, 2010) and imagined presence (Chayko, 2002; Elliott and Urry, 2010), I propose the notions of virtual (dis)connectivity, virtual place, and technological absence and presence to frame and analyze the practices engaged in by my study’s participants. Through a combination of methods, including semi-structured interviews, multimedia diaries, autoethnography, and research creation, questions of the sensory practices of mobile intimacy, control and monitoring, emerging forms of affective labor, immediacy, and reciprocity are examined in an age of global interconnectedness.
48

Regards sur les territoires des ancrages haïtiano-montréalais : les impacts des pratiques transnationales au quotidien

Lanno-Cyr, Sophie 01 1900 (has links)
À Montréal, les Haïtiens forment le troisième groupe ethnique en importance et offrent un exemple de peuple en diaspora. Étudier leurs mobilités et pratiques transnationales, ainsi que leurs incidences sur la redéfinition des concepts d’identité et de territoire, permet alors de comprendre les articulations entre le local et le transnational, dans le contexte de globalisation et de rétrécissement du monde permis par les nouvelles technologies. L’objectif de la recherche est de comprendre l’impact des pratiques transnationales et des médias dans la construction territoriale et l’ancrage des Haïtiens montréalais. Pour ce faire, 18 entrevues de type récit de vie ont été menées auprès d’un échantillon représentant les différentes vagues d’immigration haïtienne et des tables rondes ont été organisées. L’analyse des discours a permis de mettre en lumière les trajectoires, les lieux et types d’ancrages ainsi que le rôle des nouvelles technologies dans les liens translocaux de cette communauté. Les résultats, non généralisables, mettent de l’avant le rôle important des médias dans l’ancrage. Par exemple, l’ancrage des migrants de la première vague a été facilité par la création de radios haïtiennes, ces dernières ayant aidé à cimenter la communauté d’alors. Pour les deuxièmes générations, les nouveaux médias permettent de s’identifier à la diaspora et de s’ancrer en Haïti, avec des projets de développement, comme à Montréal, à travers l’expérience du cosmopolitisme. Finalement, l’analyse des récits de vie des nouveaux arrivants le confirme : les médias donnent la possibilité d’un ancrage inédit gardé à disposition avec les nouvelles technologies d’information et de communication. / Montreal’s Haitian community is the third ethnic group in terms of importance and offers an interesting example of diaspora. Studying their mobility practices and how these practices impact concepts such as identity and place allows us to understand their articulations on a local and transnational scale, in a context of globalisation and contraction of the world due to new technologies. Specifically, this study aims to understand how transnational practices and media impact territorial constructions and ancrage of Haitians in Montreal. For this purpose, 18 interviews and two round-table discussions were organized. A careful analysis of these illustrates the trajectories, places and types of ancrage and the role of new technologies in the translocal connections of this community. The results, which cannot be generalized, highlight the crucial role of media in the ancrage process. For example, the first wave’s migrant’s ancrage was facilitated by the creation of local Haitian radios, which have helped build the community. For the second generation’s interviewee, the new media allows the identification to the diaspora and the ancrage, in Haiti with development projects, as in Montreal, with the cosmopolitism experience. Finally, as the interview analysis of the newcomers shows: media gives the possibility of a novel ancrage type, kept at disposal by the new technologies.
49

Choix résidentiel de localisation et modes de vie urbains de familles de classe moyenne dans la Région Métropolitaine de Santiago au Chili / Residential Election of location and urban ways of life in familyes of middle-class of the Metropolitan Region of Santiago, Chile

Alvarez Rojas, Ana Maria 19 February 2013 (has links)
La thèse de doctorat explore, à travers une recherche qualitative de terrain, les fondements des élections résidentielles et les modes de vie résultants, chez des familles de classes moyennes en deux types de localisation dans la ville Santiago du Chili : central et péri urbaine. Les familles en localisation centrale habitaient dans des « condominios » horizontaux de la commune de Ñuñoa, tandis que les périurbains le faisaient dans des micro quartiers de l'ensemble résidentiel “Ciudad de Los Valles”, à Pudahuel rural. Le but a été d'identifier si l'élection par l'une ou l'autre localisation est précédée de l'adhésion à un mode de vie urbain spécifique, et si ces options donnent lieu à différentes pratiques par rapport aux sociabilités, aux mobilités et à la consommation. Les résultats démontrent que l'élection résidentielle constituerait le reflet plus ou moins conscient d'une conviction préalable sur ce qu'est une « bonne vie » dans la ville. L'actuel contexte de développement des villes, dont Santiago constitue un bon exemple, oblige donc à comprendre la mobilité et la permanence articulées de façons différentes selon l'expérience urbaine de l'habitant, dues en grande partie à la localisation et aux modes de vie que celles-ci induisent. Bien que nous ayons constaté qu'aucun des deux groupes est mobile dans le sens proposé par A. Bourdin (2004) les périurbains de l'échantillon seraient légèrement plus mobiles que les résidents en localisation centrale. Déjà leurs trajectoires résidentielles sont plus variées et complexes et leur disposition à la mobilité résidentielle beaucoup plus forte que dans le cas des habitants en localisation centrale. Ceux-ci n'ont aucun intérêt à abandonner la centralité et moins leur commune. Les deux groupes représentent alors une tension entre continuité et changement. Cela, non seulement dans des termes socio spatiaux, mais aussi, dans la manière où les changements dans la société chilienne s'expriment dans les actuels styles de vie. D'autre part, le caractère relatif attribué aux distances, qui s'exprime dans le fait que les deux groupes considèrent être dans une « localisation privilégiée », nous fait penser à la perception subjective des distances et à la distance même comme une représentation. Nonobstant, la mobilité périurbaine est légèrement plus centrée dans la reproduction de la vie quotidienne. Les résidents en localisation centrale soulignent, avant tout, la valeur de la fluidité, principe qu'ils étendent à leurs pratiques de consommation, où ils privilégient la liberté de choisir où, quand et quoi acheter. Cette accentuation de la liberté nous fait penser aussi à la possibilité « d'acheter du temps », aspiration qui marquerait une préférence particulière dans des segments de classes moyennes avec plus de capital culturel. Dans ce sens, les habitants en localisation centrale seraient une classe moyenne plus consolidée. Cela entretient une relation avec l'évolution historique de la commune et avec le poids qu'ont eu ces segments sociaux dans sa constitution. Sur ce point ce sont seulement les résidents en localisation centrale qui font des distinctions entre leur type de classe moyenne et celui d'autres groupes qui sont perçus comme des fractions en ascension. Ils se trouveraient dans les quartiers fermés des périphéries et au périurbain. Finalement le travail conclut que l'option par un certain lieu dans la ville, est le reflet de conceptions et de pratiques affirmées ou émergentes de relation avec les espaces urbains et avec ceux qui les fréquentent. Pour les périurbains : une ville fragmentée et éprouvée à partir d'une logique spatiale basée sur des fonctionnalités propres de leur classe sociale et leur cycle de vie, tandis que pour les centrales : une ville de contiguïtés et des bords / The thesis explores, through a qualitative research field, the foundations of residential elections and lifestyles resulting, among middle-class families, in two types of location in the city of Santiago de Chile: central and peri-urban location. Central location is understood for us as the location which is confined to the interior of the first ring of Communes and may be considered a consolidated urbanity area. These components, although they may be relatively similar in a particular social group, feed on the life history, on the process of social mobility and on the individual preferences of subjects, among other aspects. This conviction is activated when peoples make decisions about their location in the city based on the representation of lifestyle that it would be possible to reveal just in the chosen location. The results confirm changes in the sociability of proximity in both kinds of location, creating the neighborhood and the opportunity to cultivate a "neighborhood life", a key factor for the suburban residential choice. Despite of the ties to the neighborhood are less intense for the central location residents, it is seen however as a capital already acquired. The attachment and detachment, the identification and non-identification with the territory shows us different link ways of the inhabitants with the territory which is in a city in a continuous transformation process. The current context of city development, which Santiago is a good example, requires understanding mobility and stillness which are articulated differently because the urban experience of the inhabitant, largely due to the location and to the way of life that they lead. This is not only in terms of a socio-space point of view, but also in the way in which changes in Chilean society are expressed in current lifestyles. Moreover, the relative nature attributed to the distances, which is expressed in the fact that both groups consider to be in a "privileged position" makes us think about subjective perception of the distances and of the distance itself looks as a representation. Residents in central location emphasize, above all, the value of the fluidity, a principle that they extend to their consumption practices, where they prefer the freedom to choose where, when and what to buy. Also, the freedom accentuation reminds us of the opportunity to "buy time", an aspiration that would mark a particular preference in the middle class segments with more cultural capital. On this point, it is only the central location inhabitants who make distinctions between the kind of middle class and the other groups that are perceived as fractions in ascension. Finally, the paper concludes that the option for a particular place in the city is the reflection of conceptions and consolidated or emerging relationship practices with urban spaces and with those who frequent them. The chosen location is always a model city for the inhabitants; for the peri-urban ones is a fragmented city and it is proven from a spatial logic based on specific features of their social class and their cycle of life; while for the central inhabitants is a city of adjacencies and edges
50

Modélisation des vibrations d'origine ferroviaire transmises aux bâtiments par le sol / Modelling of railroad's vibrations transmit on buildings by the soil

Ropars, Pierre 14 December 2011 (has links)
Ce document propose une modélisation indirecte par sous-structuration des vibrations d'origine ferroviaire transmises aux bâtiments par le sol. La méthodologie globale est empruntée à la méthode des mobilités dans laquelle chaque sous-structure est caractérisée par sa mobilité. L'excitation est représentée par une force ponctuelle en surface du sol ou par une ligne de forces décorréllées. Elle est néanmoins calibrée sur des résultats expérimentaux. Une attention particulière a été portée à la caractérisation des comportements vibratoires des éléments du problème. La plupart des représentations de l'ensemble sol-fondations est effectuée à l'aide d'un code FEM-BEM en 2 et 2.5 dimensions. Le bâtiment est modélisé par différentes techniques : FEM, BEM, SEA et ondulatoire. Une approche probabiliste permet d'évaluer l'impact de la variabilité des sols environnent sur la mobilité des fondations. Les impédances stochastiques qui en découlent sont intégrées aux modèles de propagation. Leurs impacts sur les vibrations du bâtiment sont alors accessibles. La méthodologie permet d'obtenir les niveaux vibratoires des composantes du bâtiment / This document proposes an approach by sub-structuralization of the problem of the vibrations of railroad origin passed on in buildings by the soil. The global methodology is borrowed from the method of the mobilities, every sub-structure is characterized by its mobility. The excitement is represented by an on-surface punctual strength of the ground or by a line of uncorrelated forces. Nevertheless it can be calibrated on experimental results. A particular attention was carried in the characterization of the vibratory behavior of the elements of the problem. A major left the representations of the group soil-foundation is made by a FEM-BEM code. The building is modelled by various techniques: FEM, BEM, SEA and waves approach. A probability approach allows to estimate the impact of the variability of soil close to foundations in the model of soil-structure interaction. The stochastic impedances which ensues from it are integrated into the models of propagation. Their impacts on the vibrations of the building are also accessible. The methodology allows to obtain the vibratory levels of the components of the building

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