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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.
591

Proposta de construção de um modelo de referência para a avaliação de redes de cooperação empresariais

Bortolaso, Ingridi Vargas 27 August 2009 (has links)
Made available in DSpace on 2015-03-05T17:04:37Z (GMT). No. of bitstreams: 0 Previous issue date: 27 / Nenhuma / As redes de cooperação surgiram em resposta às exigências do ambiente competitivo e têm se mostrado uma alternativa viável para a sobrevivência e o crescimento de Pequenas e Médias Empresas (PMEs). A expansão das redes tem gerado questionamentos sobre como elas podem ser gerenciadas. Embora haja necessidade de se aprofundar o conhecimento sobre a gestão de redes são poucas as pesquisas sobre esse tema. Assim, a presente dissertação trata do tema gestão de redes de cooperação empresariais. O objetivo principal é propor um modelo de avaliação da gestão capaz de apoiar o desenvolvimento das redes que operam por meio da metodologia do programa Redes de Cooperação do Estado do RS. Para tanto, adotou-se o método denominado design research. O método constituído por cinco passos (consciência do problema, sugestão, desenvolvimento, avaliação e conclusão) possibilita a construção e avaliação de um modelo. O primeiro passo do design research, consciência do problema, é a identificação da necessidade de um modelo de gest / The cooperation networks emerged in response to the competitive environment and have proven a viable alternative to the survivor and growth of small and medium enterprises. The expansion of networks has generated questions about how could them be managed. Although there is need of deepen the knowledge about networks management, there are few researches about this subject. So the present dissertation theme treats the management of cooperation network business. The main objective is to propose a model for the evaluation of management, capable of supporting the network development of those which operate by the methodology of the program Redes de Cooperação do Estado do RS (Cooperation Networks from the RS State). To this, the method called “design research” had been adopted. The method is composed by five steps (awareness of the problem, suggestion, development, evaluation and conclusion) that makes possible a construction and evaluation of a model. The first step of design research, awareness of the problem,
592

Estratégia de pequenas e médias empresas exportadoras do Rio Grande do Sul

Baumhardt, Jorge Alberto 19 August 2008 (has links)
Made available in DSpace on 2015-03-05T18:39:05Z (GMT). No. of bitstreams: 0 Previous issue date: 19 / Nenhuma / A presente dissertação enfoca a posição competitiva de empresas exportadoras do Rio Grande do Sul, sendo uma replicação da pesquisa de Hermann Simon (1996) sobre pequenas e médias empresas alemãs de sucesso no mercado internacional, a qual originou o livro As Campeãs Ocultas. Realizou-se uma pesquisa descritiva quantitativa, na forma de survey, da qual participaram trinta e nove empresas de diversos segmentos de atividade. Avaliou-se a percepção estratégica dessas empresas sob três ângulos distintos: meta e visão, elementos do ambiente interno e elementos do ambiente externo. Utilizou-se esse modelo que avalia as empresas alemãs, devido ao sucesso desse país no mercado internacional. Os resultados indicam que a internacionalização das empresas é baixa, tendo menos do que 30% de suas receitas oriundas das exportações; apresentam uma participação média de 30,3% no mercado local, o que permite que 61,5% delas exerçam influência no mercado local. Buscam a vantagem competitiva através da qualidade e tradição. As e / The present study focuses on the strategic thinking of exporting companies established on Rio Grande do Sul, and is the replication of Hermann Simon’s (1996) research about the German midsize successful companies. This research originated the book known as The Hidden Champions. It was developed a descriptive quantitative research in the form of survey was done with thirty-nine companies from various segments of activity. This research evaluated the strategic perception of companies within different views: goals and vision, elements of the external environment and elements of the internal environment. The model selected assesses the German companies, because of the success this country has on the international market. The results indicate that the internationalization of companies, is low with less than 30% of its revenue from exports, have an average local market share of 30.3%, and this allows 61.5% of them have some kind of influence on the local market. It was also observed differences in the strategies
593

Growing up in a business family : an analytic autoethnography of 'subtle coerced succession'

Fürst, Helen January 2017 (has links)
Family businesses are the backbone of the German economy (Otten-Pappas, 2015). The word ‘family’ makes these companies distinct and indicates their influence on other parts of life. My interest stems from the fact that I was the only child of a business family. For 15 years, I was in charge of the business, contributing to its strong performance. Nevertheless, having achieved all this, I am not proud of myself and feel somehow detached in not having lived my own life. The purpose of this analytic autoethnographic study is to explore, portray and deepen understanding of the situation of growing up in a business family and what influences this has on the business, the family and the individual. The research was carried out within an analytic autoethnographic framework, reflecting the desire to make sense of my experience and to give this phenomenon a name in an ‘academic way’. The abductive nature of this study is due to the fact that I draw on theories which have not previously been brought together under the umbrella of describing and portraying the situation in a family business. This research argues that the phenomenon of ‘subtle coerced succession', which is exercised by parents to groom the natural successor for taking over the family business, exists and has a strong influence on the generational interaction. Being aware of the fact of being born in a business family may imply while being the natural successor brings a lot of stress to the individuals involved. Realising this influence on succession might reduce the number of family businesses not making it to the third generation or beyond. My contribution to knowledge is that ‘subtle coerced succession’ has various impacts on the identity development of children born into family businesses and being the natural successor by birth. This study advances the development of theory by demonstrating how theoretical frames borrowed from other research fields – the total institution, the double-bind, gender and symbolic interactionism – fit together to explain the phenomenon of the ‘subtle coerced succession’ in family businesses.
594

Star formation, quenching and chemical enrichment in local galaxies from integral field spectroscopy

Belfiore, Francesco M. C. January 2017 (has links)
Within the currently well-established ΛCDM cosmological framework we still lack a satisfactory un- derstanding of the processes that trigger, regulate and eventually quench star formation on galactic scales. Gas flows (including inflows from the cosmic web and supernovae-driven outflows) are con- sidered to act as self-regulatory mechanisms, generating the scaling relations between stellar mass, star formation rate and metallicity observed in the local Universe by large spectroscopic surveys. These surveys, however, have so far been limited by the availability of only one spectrum per galaxy. The aim of this dissertation is to expand the study of star formation and chemical abundances to resolved scales within galaxies by using integral field spectroscopy (IFS) data, mostly from the ongoing SDSS- IV MaNGA survey. In the first part of this thesis I demonstrate the ubiquitous presence of extended low ionisation emission-line regions (LIERs) in both late- and early-type galaxies. By studying the Hα equivalent width and diagnostic line ratios radial profiles, together with tracers of the underlying stellar popula- tion, I show that LIERs are not due to a central point source but to hot evolved (post-asymptotic giant branch) stars. In light of this, I suggest a new classification scheme for galaxies based on their line emission. By analysing the colours, star formation rates, morphologies, gas and stellar kinematics and environmental properties of galaxies with substantial LIER emission, I identify two distinct popula- tions. Galaxies where the central regions are LIER-like, but show star formation at larger radii are late types in which star formation is slowly quenched inside-out. This transformation is associated with massive bulges. Galaxies dominated by LIER emission at all radii, on the other hand, are red-sequence galaxies harbouring a residual cold gas component, acquired mostly via external accretion. Quiescent galaxies devoid of line emission reside in denser environments, which suggests environmental effects as a likely cause for the existence of line-less galaxies on the red sequence. In the second part of this dissertation I focus on the study of resolved chemical abundances by characterising the gas phase oxygen and nitrogen abundance gradients in a large sample of star forming galaxies. I analyse the deviations from an exponential profile at small and large radii and the dependence of the gradients on stellar mass. These findings are interpreted in the context of the inside-out paradigm of disc growth. I then demonstrate the necessity of gas flows, which are responsible for the observed flattening of the metallicity and N/O ratio gradients at large radii. Finally, I present a case study based on one nearby galaxy (NGC 628), in which I combine IFS and cold gas data to derive a spatially resolved metal budget and estimate the mass of metals lost by the galaxy throughout its life- time. By using simple physically-motivated models of chemical evolution I infer the average outflow loading factor to be of order unity.
595

Um processo para implementação da estratégia open innovation em empresas de sistemas regionais de inovação

Oliveira, Lindomar Subtil de January 2017 (has links)
A Open Innovation (OI) é uma abordagem emergente que têm despertado cada vez mais o interesse de especialistas e de estudos acadêmicos na área de inovação. Entretanto, a implemen-tação dessa estratégia ainda é desafiadora, especialmente para as Pequenas e Médias Empresas (PMEs). A carência de métodos e processos documentados e estruturados para implementar a OI, também são fatores que causam resistências e desestimulam muitas vezes as empresas. Ou-tro fato é que poucas pesquisas e trabalhos empíricos têm explorado o potencial e influência dos Sistemas Regionais de Inovação (SRIs) na implementação da OI nas empresas. Frente a essa problemática de pesquisa, esta Tese tem como objetivo geral desenvolver um processo de implementação da estratégia Open Innovation voltado para empresas de SRIs. O produto final da Tese é um framework que representa o Processo para Implementação da OI (PIOI). É uma ferramenta gerencial que visa auxiliar e orientar os gestores quanto as etapas, documentos, e forma mais apropriada para conduzir a implementação. Sobretudo, permite a compreensão dos elementos e Fatores Críticos de Sucesso (FCS) que interferem na melhoria da capacidade de inovação em PMEs. Este trabalho de Tese está estruturado em sete capítulos, com cinco artigos propostos. O artigo 1 busca identificar os fatores determinantes para a implementação da OI em SRIs. O artigo 2 apresenta uma revisão sistemática da literatura para identificar os FCS para implementação da OI no âmbito das empresas. No artigo 3, desenvolve-se uma pesquisa apli-cada com 50 empresas de um SRI para diagnosticar as estratégias de inovação e os FCS para implementação da OI. No artigo 4, propõe-se um framework para implementação da OI em PMEs de SRIs. No artigo 5, o framework é testado e avaliado empiricamente através de um estudo de caso de uma empresa. A estrutura metodológica geral da Tese está fundamentada no método de pesquisa construtivista (Design Science Research – DSR). Os artigos abrangem le-vantamento bibliográfico, survey, estudo de caso e pesquisa-ação, e empregam ambos os mé-todos, quantitativo e qualitativo, conforme seus objetivos. A Tese oferece importantes contri-buições acadêmicas e práticas ao abordar os FCS que interferem na implementação da OI, e ao desenvolver um processo para implementação dessa estratégia em PMEs de SRI’s. Além disso, representa uma oportunidade para que as empresas possam transformar e melhorar o seu pro-cesso de desenvolvimento da inovação, implementando mudanças de estratégia e introduzindo estruturas mais colaborativas que suportem novos modelos de negócios. / Open Innovation (OI) is an emerging approach that has increasingly attracted the interest of experts and academic studies in the area of innovation. However, implementing this strategy is still challenging, especially for Small and Medium Companies (PMEs). The lack of documen-ted and structured methods and processes to implement OI are factors that cause resistance and often discourage companies, besides the fact that few empirical studies and research have ex-plored the potential and influence of the Regional Innovation Systems (SRIs) in the implemen-tation of OI in companies. Faced with this research problem, this thesis has as general objective to develop a process of implementation of the Open Innovation strategy directed at SRIs com-panies. The final product is a framework that represents the Process for Implementing OI (PIOI). It is a managerial tool that aims to help and guide managers on the stages, documents, and the most appropriate way to carry out the implementation. Above all, it allows the unders-tanding of the elements and Critical Factors of Success (FCS) that affect the improvement of the innovation capacity of PMEs. The thesis is structured in seven chapters, with five proposed articles. Article 1 seeks to identify the determining factors for the implementation of OI in SRIs. Article 2 presents a systematic review of the literature to identify the FCS for implementing OI in companies. In Article 3 we carry out an applied research with 50 companies in a SRI, in order to diagnose their innovation strategies and the FCS to implement OI. In Article 4, we propose a framework for the implementation of OI in PMEs of SRIs. In Article 5, the framework is empirically tested and evaluated through a company’s case study. The general methodological structure of the thesis is based on the constructivist research method (Design Science Research - DSR). The articles cover literature review, survey, case study and action research, and use both quantitative and qualitative methods, according to their goals. The thesis offers important academic and practical contributions by addressing FCS that affect the implementation of OI, and by developing a process to establish that strategy in PMEs of SRIs. In addition, it represents an opportunity for companies to change and improve their innovation development process by implementing strategy shifts and introducing more collaborative structures that support new business models.
596

Recursos do país na internacionalização de PMES de países emergentes : um estudo no contexto brasileiro

Winckler, Natália Carrão January 2018 (has links)
Esta tese investiga a relação entre recursos do país e desempenho internacional de Pequenas e Médias Empresas (PMEs) brasileiras. Com a abertura dos mercados globais, PMEs de países emergentes enfrentam novos entrantes no mercado doméstico, se tornam multinacionais com expansão internacional tardia e características distintivas, e passam a lidar com recursos que devem ser adequados para estratégias voltadas ao mercado interno e externo, sendo a exportação o nível menos complexo e mais adotado de internacionalização dessas empresas. Compreender a internacionalização a partir das características da firma e da localização em um país de origem emergente mostra-se um desafio gerencial e teórico. A Visão Baseada em Recursos (VBR) é apropriada para esse tópico de pesquisa, pois permite abordar os recursos da firma e do país na geração de vantagem competitiva sob a lógica da internacionalização. Recursos do país são externos à firma e disponíveis a qualquer empresa localizada em um país (FAHY, 2002) e ainda não foram investigados quanto ao seu uso e relação com o desempenho na internacionalização de PMEs de países emergentes. Para suprir esta lacuna teórica, esta pesquisa se dividiu em duas fases: a etapa qualitativa e exploratória identificou recursos para internacionalização de PMEs de países emergentes. Adotaram-se técnicas de revisão sistemática de literatura, seguida de entrevistas com especialistas, instituições e PMEs no contexto brasileiro. Identificaram-se 11 recursos do país por meio de análise de conteúdo com apoio do software Nvivo. O grau de utilização e a relação dos recursos do país com o desempenho internacional das empresas foram verificados empiricamente na etapa quantitativa e descritiva da pesquisa, em uma Survey com 222 PMEs brasileiras. O desempenho internacional foi medido de modo subjetivo, por um construto de satisfação com atividades internacionais nos últimos três anos, e de modo objetivo, baseado na intensidade exportadora da empresa. A análise dos dados foi feita com técnicas estatísticas paramétricas e apoio do software SPSS. Os principais resultados apontam que os recursos do país mais utilizados são os de acesso à informação, infraestrutura logística e cadeias produtivas bem desenvolvidas, os quais explicam 9,4% do desempenho internacional subjetivo das PMEs brasileiras. Por outro lado, não há relação entre recursos do país e intensidade exportadora das empresas. Houve diferenças no uso de recursos do país quanto às características da empresa exportadora, como idade, escopo geográfico, intensidade tecnológica e tipo de gestão, o que não ocorreu quanto à experiência internacional. Embora os recursos do país sejam utilizados pelas PMEs brasileiras, destaca-se que não são determinantes para sua vantagem competitiva no mercado externo. As PMEs brasileiras estão otimistas em relação ao crescimento nas exportações. Os recursos do país associados à satisfação com atividades internacionais devem embasar políticas e projetos setoriais para internacionalização dessas empresas. Os resultados desta pesquisa cobriram lacunas teóricas sobre o tema de internacionalização de PMEs de países emergentes sob a Visão Baseada em Recursos e abriram novos caminhos de investigação. Pesquisas futuras podem comparar estes resultados com o contexto de empresas de diferentes portes e países emergentes. Possivelmente, os recursos do país menos estratégicos para PMEs brasileiras sejam estratégicos em outros contextos, o que deve ser verificado empiricamente. Por fim, sugere-se verificar quais recursos da firma estão associados ao uso de recursos do país e demais fatores determinantes no desempenho internacional de PMEs de países emergentes. / This thesis investigates the relationship between country resources and the international performance of Brazilian Small and Medium Enterprises (SMEs). With the opening of global markets, emerging market SMEs face new entrants in the domestic market, become multinationals with late international expansion and distinctive characteristics, and begin to deal with resources that should be adequate for strategies aimed at the domestic and foreign market. Export is the less complex and more used mode of entry of SMEs in foreign markets. Understanding the internationalization through the characteristics of the firm and its location in an emerging country of origin is a managerial and theoretical challenge. The Resource Based View (VBR) is appropriate for this research topic because it allows an approach to the country and the firm resources to create competitive advantage in internationalization. Country resources are external to the firm and available to any company located in a country (FAHY, 2002). There are no researches about the use and relation of country resources to internationalization performance of SMEs in emerging countries. To fill this theoretical gap, this research was divided into two phases: the qualitative and exploratory stage identified resources for internationalization of SMEs from emerging countries. Techniques of systematic literature review were adopted, followed by interviews with specialists, institutions and SMEs in the Brazilian context. Eleven country resources were identified through content analysis supported by Nvivo software. The use and the relation of country resources to the international performance of the SMEs were verified empirically in the quantitative and descriptive stage of the research, in a Survey with 222 Brazilian SMEs International performance was measured subjectively by a construct of satisfaction with international activities in the last three years, and in an objective way, based on the export intensity of the company. Data analysis was performed using parametric statistical techniques with SPSS software support. The main results indicate that the most used country resources are information access, logistics infrastructure and well-developed production chains, which are responsible for 9.4% of the subjective international performance of Brazilian SMEs. On the other hand, there is no relation between resources of the country and export intensity SMEs. There were differences in the use of country resources regarding the characteristics of the exporting SMEs, such as age, geographic scope, technological intensity and type of management. There were no differences regarding international experience of firms. Although country resources are used by Brazilian SMEs, it is highlighted that they do not generate competitive advantage in the foreign market. Brazilian SMEs are optimistic about the growth in exports. Country resources associated to the satisfaction with international activities should support policies and sectoral projects for the internationalization of these firms. The results of this research covered theoretical gaps on the theme of internationalization of SMEs from emerging countries under the Resource Based View and opened new avenues of research. Future research can compare these results with other firms with different sizes and from other emerging countries. Possibly, the less strategic country resources for Brazilian SMEs are strategic in other contexts, which should be verified empirically. Finally, it is suggested to verify which firm resources are associated to the use of country resources, as well as other determining factors to the international performance of SMEs in emerging countries.
597

Les pratiques des PME privées algériennes et leur incidence sur le territoire. Cas des PME agroalimentaires / Practices of private Algerian Small and Medium Enterprises and their impact on the territory. Case of Agrifood factory.

Kellou, Rym 17 December 2013 (has links)
Depuis une trentaine d'années, en même temps que l'accélération de la mondialisation, on assiste au Sud comme au Nord à l'affirmation de l'espace local comme espace de référence pertinent pour l'action et la réflexion économiques. Et cette affirmation s'accompagne de l'émergence d'une autre approche du développement, approche territorialisée aux termes de laquelle le développement est le fait d'une multiplicité d'acteurs organisés en réseaux - formels et informels - et entretenant entre eux des relations intenses et économiquement fécondes. La question que nous aborderons dans ce rapport porte sur la relation entre PME et territoire - au sens .local du mot - et les implications de cette relation en matière de développement des régions. / Since around thirty years, at the same time as the acceleration of the globalization, we are witnessing in the South as in the North to the affirmation of the local space as the relevant reference space for the economic action and reflection. And this assertion is accompanied by the emergence of another approach of the development: territorialized approach under which development is the fact a multiplicity of actors organized in networks - formal and informal- and maintaining between the them intense and economically fertile relationships. The question we address in this report focuses on the relationship between SMEs and territory - at the local sense of the word - and the implications of this relationship in terms of regional development
598

Production Planning Solutions for Mass Customised Fashion

Mueller, Anne, Janssen, Berit January 2012 (has links)
This thesis concentrates on different production planning solutions for mass customised fashion with regard to machine setups. The purpose of this research is to reveal the significant aspects and challenges for SMEs that have to be considered when production steps need to be aligned to the mass customisation principle. Therefore a theoretical framework will approach the subject of production planning, as well as mass customisation. In addition, a case study will assure scientific support by developing and examining production planning solutions. The different levels of production set-ups induce the technological facilities that are indispensable for an integration of mass customisation. Finally it will be analysed and discussed whether it is feasible for an SME to invest in such a business strategy. Especially in a SME the boundaries between pure tailor- made customisation and pure mass customisation are often blurred, wherefore the findings should contribute to a clarification. Since mass customisation is a future- oriented concept, this paper is of definite interest to small companies, which intend to successfully achieve mass customisation. / Program: Master programme in Applied Textile Management
599

Incorporando papéis: uma leitura psicossocial do fenômeno da mediunidade de incorporação em médiuns de umbanda / Incorporating roles: the psychosocial dimension of the embodiment of spirits among Umbanda mediums

Zangari, Wellington 22 August 2003 (has links)
Estuda a mediunidade de incorporação entre médiuns de Umbanda em sua dimensão psicossocial, a partir da teoria de papéis proposta por Hjalmar Sundén. Os Ss são 12 médiuns de incorporação, entre 16 e 61 anos de idade, 11 do sexo feminino e 1 do sexo masculino, do Templo Espírita de Umbanda Xangô Agodô, situado na cidade de São Paulo. Os médiuns passam por entrevistas semi-dirigidas e são observados durante rituais de incorporação. Com o objetivo de reconhecer a cultura do grupo ao qual pertencem, realizam-se, ainda, entrevistas informais com pessoas não médiuns que também participam regularmente das atividades do referido templo. Apresenta um modelo interpretativo interdisciplinar da mediunidade de incorporação, considerando: a) a importância da dimensão grupal ampla, da dimensão social dos grupos e da dimensão individual, e da relação entre estas dimensões para a compreensão da mediunidade de incorporação; b) a importância da linguagem, em sentido amplo, como meio de interação social necessário para a existência e manutenção da mediunidade de incorporação; c) o processo de construção tanto social quanto individual da mediunidade de incorporação; d) o processo de adoção e assumição de papéis por parte dos médiuns de incorporação; e) a função social da mediunidade de incorporação; e f) os possíveis ganhos psicológicos por parte dos médiuns de incorporação. Conclui que a mediunidade de incorporação pode , ser compreendida como um papel social complexo em queestão em jogo tanto elementos sociais quanto individuais em que as entidades incorporadas são consideradas como constructos psicossociais e, assim, os médiuns são, ao mesmo tempo, seus intérpretes e coautores / This dissertation analyses the psychosocial dimension of mediumship related to the embodiment of spirits, from the point of view of Hjalmar Sundén\'s Role Theory. The subjects studied were 12 Umbanda mediums, 11 of whom were female and 1 male, between 16 and 61 years-of-age, all participants of the Spiritist Temple of Umbanda Xangô Agodô, in São Paulo, SP, Brazil. The mediums were submitted to semioriented interviews and were observed during the rituals in which they claimed to incorporate spirits. In order to examine cultural aspects of their social group, other subjects who were not mediums but who participated regularly in the activities of that temple were informally interviewed. An interdisciplinary interpretative model of \"incorporative\" mediumship is presented which considers the following points: (a) the importante of the wider group dimension, the social dimension of small groups, of the individual dimension, and of the relationships established between these dimensions to an understond of \"incorporative\" mediumship; (b) the importante of language - considered in its broadest sense - as a way of social interaction which is necessary to the existente and maintenance of \"incorporative\" mediumship; (c) the process of social and individual construcion of \"incorporative\" mediumship; (d) the process of roletaking and role-adopting by \"embodiment\" mediums; (e) the social function of \"incorporative\" mediumship; and (f) the possible psychological benefitsobtained by \"incorporative\" mediums from their mediumship. It is concluded that mediumship which includes the embodiment of \"spirits\" can be understood as a complex social role that is comprised of both social and individual elements. The \"incorporated\" entities are considered to be psychosocial consctructs, therefore the mediums are, at the same time, their interpreters and their co-authors
600

Statistical properties of the galactic magnetic field observed with the Planck satellite / Les propriétés statistiques du champ magnétique Galactique observé par le satellite Planck

Bracco, Andréa 16 December 2014 (has links)
La dynamique du milieu interstellaire (MIS) est au cœur de notre compréhension de la formation des étoiles. La structuration du MIS est régiée par l’interaction entre gravité, mouvements turbulents et champs magnétiques. Si les deux premiers acteurs sont bien caractérisés par les observations, le r ˆ ole du champ magnétique Galactique (CMG), ainsi que son interaction avec la matière interstellaire, sont encore peu connus. La cartographie complète du ciel dans le domaine submillimétrique réalisée par le satellite Planck nous permet d’étudier la structure du CMG, projetée sur le plan du ciel, à partir de la polarisationde l’émission de la poussière interstellaire. Dans cette thèse, nous présentons une analyse des cartes en polarisation à 353 GHz, observées par l’instrument à hautes fréquences HFI de Planck. Nous étudions la structure du CMG et son interaction avec la turbulence interstellaire, de l’ensemble du voisinage Solaire aux échelles de la structure en filaments de la matière, dans le milieu diffus et les nuages moléculaires. La première étude statistique de la corrélation entre la géométrie du CMG et la structure de matière interstellaire est réaliséeen utilisant une méthode originale pour identifier les structures et mesurer leur orientation sur l’ensemble du ciel, puis quantifier les effets de projections. Les résultats sont interprétés en référence aux hypothèses théoriques et aux résultats obtenus à partir de simulationsnumériques magnétohydrodynamiques. Nous concluons que la turbulence tend à former des structures parallèles au champ magnétique dans le milieu diffus, et la gravité des structures perpendiculaires au champ dans les nuages moléculaires. Enfin, nous présentons et discutons deux perspectives liées à notre travail: la modélisation du ciel en polarisation aux hautes latitudes Galactiques comme avant-plan du fond cosmologique, et la relation entre cinématique du gaz et champ magnétique dans les structures en filaments du MIS. / The study of the dynamics of the interstellar medium (ISM) is essential to understand star formation. The ISM is a turbulent and magnetized medium governed by the interplay of self-gravity, turbulent motions and magnetic fields. While the former two are well characterized byexisting models and observations, today, the role of the Galactic magnetic field (GMF), and its interaction with interstellar matter, represent the most difficult aspects to probe. Thanks to its high sensitivity and resolution, full-sky coverage, and imaging at sub-mm wavelengths,the Planck satellite represents an enormous step forward in the characterization of the statistical properties of the GMF, as traced by dust polarization. In this thesis we present an analysis of the 353 GHz Stokes parameters maps (I, Q, U) observed with the High Frequency Instrument (HFI) of Planck. we aim at studying the structure of the GMF, and its interplay with interstellar turbulence, from the largest scales in the Solar neighborhood to those of the filamentary structures in the diffuse ISM and molecular clouds. We also develop a dedicated methodology to produce the first statistical study on the correlation betweenthe geometry of the GMF, projected on the plane of the sky, and the structure of interstellar matter. We interpret the results of the data analysis in light of theoretical models and Magneto-Hydrodynamic (MHD) numerical simulations, and conclude that my findings supporta scenario of formation of structures in the ISM where turbulence organizes matter parallel to the magnetic field in the diffuse medium, and the gas self-gravity produces perpendicular structures in the densest and magnetically dominated regions. We propose and discuss several perspectives of research related to our results, from the modeling of the high-latitude sky in polarization, for the investigation of dust properties and cosmological foregrounds, to the comparison of magnetic fields with the kinematics of the filamentary structures in the SM.

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