• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 23
  • 7
  • 3
  • 3
  • 1
  • Tagged with
  • 39
  • 9
  • 7
  • 7
  • 7
  • 7
  • 5
  • 5
  • 5
  • 5
  • 4
  • 4
  • 4
  • 4
  • 4
  • 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.
1

Expert vs. Novice: Problem Decomposition/Recomposition in Engineering Design

Ting, Song 01 May 2014 (has links)
The purpose of this research was to investigate the differences of using problem decomposition and problem recomposition among dyads of engineering experts, dyads of engineering seniors, and dyads of engineering freshmen. Fifty participants took part in this study. Ten were engineering design experts, 20 were engineering seniors, and 20 were engineering freshmen. Participants worked in dyads to complete an engineering design challenge within an hour. The entire design process was video and audio recorded. After the design session, members participated in a group interview. This study used protocol analysis as the methodology. Video and audio data were transcribed, segmented, and coded. Two coding systems including the FBS ontology and “levels of the problem” were used in this study. A series of statistical techniques were used to analyze data. Interview data and participants’ design sketches also worked as supplemental data to help answer the research questions. By analyzing the quantitative and qualitative data, it was found that students used less problem decomposition and problem recomposoition than engineer experts in engineering design. This result implies that engineering education should place more importance on teaching problem decomposition and problem recomposition. Students were found to spend less cognitive effort when considering the problem as a whole and interactions between subsystems than engineer experts. In addition, students were also found to spend more cognitive effort when considering details of subsystems. These results showed that students tended to use dept-first decomposition and experts tended to use breadth-first decomposition in engineering design. The use of Function (F), Behavior (B), and Structure (S) among engineering experts, engineering seniors, and engineering freshmen was compared on three levels. Level 1 represents designers consider the problem as an integral whole, Level 2 represents designers consider interactions between subsystems, and Level 3 represents designers consider details of subsystems. The results showed that students used more S on Level 1 and 3 but they used less F on Level 1 than engineering experts. The results imply that engineering curriculum should improve the teaching of problem definition in engineering design because students need to understand the problem before solving it.
2

Spectral recomposition and multicomponent seismic image registration

Cai, Yihua, 1978- 20 July 2012 (has links)
Spectral recomposition splits a seismic spectrum into Ricker components. It provides a tool for imaging and mapping temporal bed thicknesses and geologic discontinuities. I propose an application of separable, nonlinear, least-squares estimation in spectral recomposition. Employing the Gauss-Newton method, this approach estimates fundamental signal parameters such as peak frequencies and amplitudes. I applied spectral recomposition to multicomponent seismic data, which provides new perspectives of seismic attributes and multicomponent data interpretation. Correlating S-wave reflection with P -wave reflection is one of the very first steps in multicomponent data interpretation. In a given stratigraphic interval of a geologic section, registration correlates P and S-wave profiles to determine ts /tp ratios, which are equivalent to Vp /Vs ratios for vertical propagation paths. The registration process is largely driven by the availability of dipole sonic logs. However, dipole sonic logs are not as common as standard sonic logs and tend to be affected by various borehole factors. Therefore, new techniques are needed for accurate P P and P S correlation and registration. Assuming P P and P S reflection events have been correctly positioned laterally in migrated images, and the difference between P P wave image and P S wave image can be explained only by vertical transformation, I adopt a multistep approach to register PP and PS images automatically. Setting PP time as a coordinate system, I was able to squeeze P S traces accordingly while keeping the signal pattern of P S wave data. Local seismic attributes, such as the local similarity, help improve registration accuracy. / text
3

Secolarizzazione e ricomposizione del sacro in Italia : il caso delle comunità parrocchiali della Garfagnana / Sécularisation et recomposition du sacré en Italie : le cas des communautés paroissiales de la Garfagnana / Secularisation and recomposition of the sacred in Italy : the case of parish communities in Garfagnana

Rossi, Chiara 24 March 2016 (has links)
S’insérant dans l’ample débat sur la sécularisation, cette étude se focalise sur les modalités actuelles de coexistence, dans un contexte donné, de la sécularisation et de la dé-sécularisation qui se rencontrent et s’agencent parfois sur un mode insolite, générant nécessairement, à travers un processus de décomposition et de recomposition du religieux, des conséquences sur l’action des individus et sur les dynamiques collectives. À travers une approche ethnographique basée sur le principe de l’interconnaissance, sur la technique de l’observation participante et sur de nombreux entretiens en profondeur, l’enquête sonde les changements en acte à l’intérieur d’un univers rural qui remodèle actuellement les espaces et les formes de son système de croyances religieuses. Le terrain d’étude qui fait l’objet de notre enquête est une petite vallée de l’Italie centro-septentrionale (la Garfagnana) et la paroisse revêt le rôle de principal centre d’observation. Effectivement, dans le contexte considéré, cette institution apparait, au cours des siècles, comme un point de repèreessentiel non seulement pour la communauté religieuse mais aussi pour la société civile, et demeure l’instrument privilégié qu’utilise l’Église afin de maintenir et/ou de recréer le réseau de liens avec ses fidèles. L’analyse des dynamiques à travers lesquelles ces rapports sont conservés, créés et alimentés à l’intérieur de la communauté paroissiale nous mène à la compréhension de l’identité catholique de cette région singulière en mettant en évidence les modalités et les conséquences du croire – sur le plan tant individuel que collectif − ainsi que les motivations des différentescatégories d’acteurs. / This study, included in the wider debate regarding the secularisation process, mainly focuses on the ways in which nowadays secularisation and de-secularisation can coexist in a specific context, convening, at times adding to each other, and thus generating, through a process of decomposition and recomposition of the sacred, unavoidable consequences on individual actions and collective dynamics. Through an ethnographic approach, based on inter-knowledge, on participant observation techniques and on numerous in-depth interviews, the research examines the ongoing changes within a transitioning rural universe, which is remodelling spaces and structures of its religious belief system. The research was carried out in a small valley in Northern Italy (Garfagnana) and the main focus of the study was the parish. In this context, this institution has been over the centuries an important reference point, not only for the religious universe but also for the civil community and still today represents the privileged means by which the church creates and maintains the networkof bonds with its worshippers. The analysis of the dynamics by which , within a parish community, these bonds are preserved, recreated and nurtured has led us towards understanding the catholic identity of this particular region, highlighting the modalities, the motivations and the consequences of religious beliefs, on both an individual and collective level, of the many categories of participants.
4

L’intercommunalité à l’épreuve. Jeux d’acteurs et effets de système dans la production de l’action sportive communautaire. Le cas de la Communauté d’Agglomération du Bassin d’Arcachon Sud / Intermunicipality” to the test. Dynamics of organized action and system effects in production of sports intercommunal policy. The case of “Communauté d’Agglomération du Bassin d’Arcachon Sud”

Bonneau, Lise 09 December 2014 (has links)
L’intercommunalité sportive est aujourd’hui une réalité. D’une logique d’opportunité à une logique de projets, la coopération intercommunale en la matière se développe de façon hétérogène, selon les stratégies déployées par les élus locaux, défendeurs des intérêts communaux et soucieux de conserver leurs prérogatives dans les affaires locales. L’apprentissage de l’intercommunalité nécessite un long processus d’appropriation, heurté par des résistances au changement de référentiel. La gouvernance du sport se retrouve pourtant affectée des effets du développement de l’intercommunalité sportive, entre rationalisation de l’action publique et effets pervers, des effets d’aubaine suscités par les réformes de l’Etat aux interactions entre acteurs, qui influencent la définition et la mise en oeuvre de l’action sportive communautaire. / Links between local authorities in the realm of Sports is now a reality. From a logic of opportunity to a logic of project, Intermunicipal coopération on the subject is developing in a heterogeneous way, depending on strategies of the local elected representatives, who are defending their own interests and are mainly worried of keeping their own prerogatives in local affairs. The learning curve of « intermunicipality work » requires a long process of appropriation, confronted with a resistance to a change of existing references. The governance of the world of sports is thus affected by the rationalization of public action and pernicious effects stemming form improbable opportunities, which are coming from new governmental laws and regulations. Beyond the consequences of this system, interactions between the main players will impact the definition and the establishment of the Sports intercommunal Policy, thus making more complex the regulation of local sports politics.
5

Nerval, écrivain voyageur : une nouvelle forme de voyage littéraire

Park, Chang - Hwa 15 February 2012 (has links)
Cette étude est consacrée aux procédés narratifs du récit de voyage de Nerval, du point de vue de l’intertextualité et de l’autobiographie. Dans la première partie, nous abordons le récit de voyage en général, en centrant l’attention sur le voyage littéraire subjectif et autobiographique : son statut spécifique en tant que genre littéraire, son évolution chronologique, ses formes, son intertextualité et son caractère autobiographique. Dans la deuxième partie, nous étudions la spécificité du récit de voyage de Nerval sur le plan narratif, sur celui de l’intertextualité et sur celui de l’écriture autobiographique, selon les différents types des voyages nervaliens : voyage réaliste (Voyage en Orient, Lorely), voyage excentrique (Les Faux Saulniers), voyage parodique (Les Nuits d’octobre), voyage autobiographique (Promenades et Souvenirs) et voyage intérieur (Aurélia). Enfin, dans la troisième partie, nous analysons la poétique du voyage littéraire de Nerval dans la perspective de la modernité de son écriture, en considérant le mélange des formes, les pratiques intertextuelles (référence, réécriture et recomposition), l’originalité du voyageur fantaisiste, le récit poétique et dialogique et l’écriture réaliste. / This study focuses on the narrative processes of travel story of Nerval, in terms of intertextuality and autobiography. In the first part, we discuss of the travel story in general, with a focus on the subjective and autobiographical literary travel : its special status as literary genre, its chronological develpment, its forms, its intertextuality and its autobiographical nature. In the second part, we study specificity of the travel story of Nerval on the narrative level, that of intertextuality and that of autobiographical writing, according to diffrents types of Nerval’s travels : realistic travel (Voyage en Orient, Lorely), eccentric travel (Les Faux Saulniers), parodic travel (Les Nuits d’octobre), autobiographical travel (Promenades et Souvenirs) and interior travel (Aurélia). Finally, in the third part, we analyse the poetics of travel writing of Nerval in the context of the modernity of his writing, considering the mixture of forms, the intertextual practices (reference, rewriting and reorganzation), the originality of fanciful traveler, the poetic and dialogic stroy and realistic writing.
6

Le cinéma libanais d’après guerre : Construction de mémoire et recomposition identitaire / The post-war lebanese cinema : building of memory and identity recomposition

Eid, Robert 22 November 2010 (has links)
Au lendemain de la guerre au Liban [1975-1990], de jeunes cinéastes refusent de faire l’impasse sur le passé et œuvrent par le biais de leurs films à rendre la mémoire salutaire. La présente recherche étudie les nouvelles configurations cinématographiques de ce nouveau cinéma d’après-guerre, caractérisé par une rétrospective mémorielle et comptable au sein d’une époque révolue. En s’appuyant sur un corpus filmique d’une vingtaine de films, analysés comme des traces matérielles et symboliques, les différentes parties de cette recherche explorent les convergences et les problématiques qui posent la dialectique Mémoire-Histoire à travers la représentation. L’étude scrute également les traces de la mémoire en parcourant les processus relatifs au conflit, au travail de deuil et à l’oubli, en s’interrogeant sur les capacités du cinéma libanais, émergeant d’une société au pluralisme identitaire, à calibrer son potentiel d’expression et son aptitude à problématiser les déboires d’une société meurtrie. Les pistes d’analyse se déclinent autour de la figuration de Beyrouth, comme ville anthropomorphique et emblématique. En dernière partie l’étude aborde les manifestations et les profils d’un sujet symptomatique en quête de son identité au sortir de la guerre au Liban. / After the war in Lebanon [1975-1990 ], young film-makers refuse to ignore the past and work by means of their movies to restore a wholesome memory. The present research studies the new films configurations of the post-war Lebanese cinema, characterized by a memorial and countable retrospective within bygone days. By leaning on a cinematic corpus of about twenty movies, analyzed as material and symbolic tracks, the various parts of this research investigate the convergences and the problems which put the dialectic Memory - history through the representation. The study also scrutinizes the tracks of the memory by going through the processes relative to the conflict, to the work of mourning and the oblivion by questioning the capacities of the Lebanese cinema, to calibrate its potential of expression and its capacity to analyze the setbacks of a bruised society. The paths of this research will also examine the representation of Beirut, as anthropomorphic and symbolic city. In last part, the study approaches the profiles of a symptomatic subject in search of its identity at the end of the war in Lebanon.
7

Fragmentation et recomposition dans la fiction de John Fowles : vers une résolution de la crise postmoderne ? / Fragmentation and recomposition in John Fowles’s fiction : towards a resolution of the postmodern crisis ?

Saubion, Sonia 19 November 2011 (has links)
L’imaginaire contemporain a vu naître une esthétique du fragment qui se caractérise par la dissolution du sujet en quête d’identité dans un monde privé de stabilité et de repères au lendemain du traumatisme suscité par la guerre et la menace nucléaire. Le déni du principe de linéarité, les jeux de l’intertextualité et de l’intergénéricité de même que l’éclatement des schémas de représentation qui sous-tendent les romans réalistes traditionnels favorisent le déploiement des grilles de lecture interprétative au détriment de l’harmonisation des discours. Cette thèse, qui couvre l’intégralité de la fiction fowlesienne depuis 1963, se propose de diagnostiquer les symptômes de la crise ainsi postulée, par le prisme d’une étude (méta)textuelle, narratologique, linguistique, philosophique, mythocritique et psychanalytique. Il s’agit de voir comment l’auteur, les narrateurs et les protagonistes mis en scène envisagent de résoudre leur conflit existentiel et de réintégrer le réel dont ils se sont peu à peu désolidarisés. Ces derniers peuvent choisir de disloquer le réel pour mieux l’apprivoiser et pouvoir ensuite se l’approprier ou encore de recoller les fragments éparpillés en projetant leur moi à travers une identité fictive idéale pour retrouver le chemin de leur individuation. Une telle évolution du dissensus au consensus traduit la veine humaniste d’une œuvre qui s’efforce non seulement de faire renouer l’individu avec son moi authentique mais aussi de le réconcilier avec les autres dans un univers qui gagne en cohérence. / The contemporary imaginary has given rise to an aesthetics of fragmentation which is characterized by the dissolution of the self in search of an identity in a world deprived of stability and landmarks soon after the trauma caused by the war and nuclear threat. The refusal to follow the principle of linearity, together with the play involved in intertextuality and intergenericity, the disruption of representational patterns underlying traditional realistic novels, favour the display of reader responses at the expense of the harmony of utterances. This thesis, which covers the whole of Fowles’s fiction since 1963, aims at diagnosing the symptoms of the aforementioned crisis by means of a study including metatextual, narratorial, linguistic, philosophical, mythocritical and psychoanalytical tools. We will see how the author, the narrators, the protagonists on stage consider coming to terms with their existential conflicts and returning to a reality they have progressively dissociated themselves from. The latter can either choose to disintegrate the « real » in order to get a better apprehension of it and then to put the scattered fragments together again so as to appropriate them, while projecting their selves through an ideal and a fictional identity, which paves the way for their individuation. Such an evolution from dissensus to consensus conveys the humanistic vein of a work which endeavours not only to have the individual take up with his/her more authentic self but also to reconcile him/her with the others within a universe gaining in coherence.
8

Condições topoclimáticas preferenciais para plantios de paricá (Schizolobium parahyba var. amazonicum (Huber ex. Ducke) Barneby) e evidências de desempenho para otimizar a silvicultura em áreas desflorestadas na Amazônia / Preferential topoclimatic conditions for parica (Schizolobium parahyba var. amazonicum (Huber ex. Ducke) Barneby) plantations and evidence of performance to optimize the silviculture in deforested areas in the Amazon

Monteiro, Daiana Carolina Antunes 22 October 2013 (has links)
O maior desafio da atualidade é atender a demanda crescente por matéria prima de forma responsável, mantendo a funcionalidade dos sistemas naturais às gerações atuais e futuras. Na Amazônia, formas históricas de uso do solo têm comprometido o padrão de cobertura e diversidade florestal. O Estado do Pará apresentou, de 2004 a 2012, as maiores taxas de desflorestamento na região, contabilizando 22% do Estado, resultando em reduções na biodiversidade e, consequentemente, no aumento de paisagens degradadas. Neste contexto, a silvicultura de espécies nativas apresenta-se como atividade potencialmente mitigadora, recompondo áreas alteradas, tornando-as produtivas, contribuindo com a conservação genética, a manutenção de serviços ambientais e a geração de emprego e renda. Para alcançar produções eficientes e eficazes existem pressupostos fundamentais, como identificação de material genético de alto rendimento, espécies compatíveis às condições edafoclimáticas, aspectos silviculturais e ecológicos das espécies. Neste trabalho, objetivou-se identificar condições topoclimáticas preferenciais ao paricá (Schizolobium parahyba var. amazonicum (Huber ex. Ducke) Barneby), espécie nativa da Amazônia, plantada em escala comercial no Brasil, para fim de laminação e seus derivados. Foram utilizadas informações georreferenciadas de ocorrências naturais e avaliadas as condições topoclimáticas predominantes nessas ocorrências. Para identificar faixas preferenciais foram aplicadas técnicas multivariadas, considerando as evidências obtidas em campo. Utilizando soluções de álgebra de mapas em ambiente de Sistema de Informação Geográfica (SIG) realizaram-se integrações de variáveis topobioclimáticas, selecionando as faixas preferenciais e limitantes à espécie. Como resultado, obteve-se o zoneamento indicando três zonas, com alto, médio e baixo potencial ao paricá, no Pará. As análises subsequentes foram realizadas utilizando dados de campo em plantios de paricá, no município de Dom Eliseu, no sudeste do Pará. Foram realizadas classificações digitais supervisionadas, utilizando imagens orbitais LANDSAT/TM-5 de 2010 para identificar padrões de uso e cobertura do solo no município. Os plantios de paricá foram espacializados no mapa de zoneamento de potencialidades do município, o que possibilitou a análise de respostas em NDVI (Normalized Difference Vegetation Index) extraídos do sensor remoto MODIS (Moderate Resolution Imaging Spectroradiometer), em diferentes períodos de deficiência hídrica (CAD 300 mm), aplicando-se teste de média e análise de perfil por meio de técnicas uni e multivariadas. Verificou-se que existe tendência no vigor do paricá, com decrescimento de 0,85 a 0,68, nos meses de maior deficiência hídrica, bem com diferenças significativas entre os plantios nas áreas de alto e médio potencial. Além disso, diferenças no incremento dendrométrico na transição do período seco para o chuvoso foram avaliadas em nível de significância de 5%. A partir dos resultados, quatro cenários silviculturais foram estabelecidos, considerando forças motrizes na cadeia produtiva do paricá. As áreas com alto potencial topoclimático expressam respostas espectrais mais elevadas, indicando maiores ofertas hídricas no solo, ao paricá. Cenários de plantios florestais nas zonas de alto potencial são evidências de maximização de ganhos econômicos, sociais e ambientais. Espera-se, com esses resultados, subsidiar estratégias de redução de riscos em plantios de espécies nativas para consolidar uma economia de baixa emissão de carbono na Amazônia, em conformidade com atual Código Florestal. / Today\'s greatest challenge is to meet the growing demand for raw materials in a responsible way, maintaining the functionality of the natural systems for actual and future generations. In Amazon, historically the different uses of the land have damaged the standards of forest covering and diversity. The State of Para showed, from 2004 to 2012, the biggest deforestation rates in the region, accounting for 22% of the state, resulting in biodiversity losses and, consequently, in the increase of degraded landscapes. Therefore, the silviculture of native species presents a potentially mitigating activity, recovering modified areas, turning them productive, contributing to the conservation genetics, to the maintenance of environmental services and the creation of jobs and income. To achieve an efficient and effective production there are fundamental assumptions like the identification of high yield genetic material, of species compatible with the edaphoclimatic conditions, of the silvicutural and ecology aspects of the species. This paper aims to identify preferential topoclimatic conditions for the parica (Schizolobium parahyba var. amazonicum (Huber ex. Ducke) Barneby), a native species of the Amazon planted in large-scale in Brazil, for wood-laminating and derivatives. Georreference information of natural occurrence was used and the topoclimatic conditions prevailing in these occurrences were evaluated. To identify preferential rates multivariate techniques were applied considering the evidence obtained on the field. Using solutions of algebra maps on a Geographic Information System platform (SIG), integrations of topoclimatic variables were realized selecting preferred and limiting ranges to the species. As a result, we obtained the zoning showing three zones, of low, medium and high potential for the parica, in the State of Para. The subsequent analyses were realized using field data of parica plantation in the municipality of Dom Eliseu, in southeastern Para. Supervised digital classifications were realized using the orbital images LANDSAT/TM-5 of the 2010 to identify the patterns of land use and land cover in the municipality. The parica plantations were spatialized on zoning map to potential of municipality which made possible the analysis of the NDVI (Normalized Difference Vegetation Index) answers extracted from the MODIS (Moderate Resolution Imaging Spectroradiometer) remote sensor, in different periods of water deficit (AWC 300mm), applying a test of average and a profile analysis, using univariate and multivariate techniques. A tendency has been found in the parica vigor with a decrease from 0.85 to 0.68, in the months of greater water deficit, as well as differences between plantings in areas of high potential and those of medium potential. In addition, differences in dendrometric increase, in the transition of dry to rainy season, have been evaluated in a significance level of 5%. From this result, four silvicultural scenarios were established considering the driving forces in the parica\'s production chain. The high potential topoclimatic areas express higher spectral answer, indicating a higher water supply in the soil for the parica. Scenarios of forest plantation in high potential zones are evidences of economic, social and environmental gains maximization. With those results, we hope to subsidize strategies of risk reduction in plantings of native species to consolidate an economy of low carbon emission in the Amazon, in conformity with the current Forest Code.
9

Condições topoclimáticas preferenciais para plantios de paricá (Schizolobium parahyba var. amazonicum (Huber ex. Ducke) Barneby) e evidências de desempenho para otimizar a silvicultura em áreas desflorestadas na Amazônia / Preferential topoclimatic conditions for parica (Schizolobium parahyba var. amazonicum (Huber ex. Ducke) Barneby) plantations and evidence of performance to optimize the silviculture in deforested areas in the Amazon

Daiana Carolina Antunes Monteiro 22 October 2013 (has links)
O maior desafio da atualidade é atender a demanda crescente por matéria prima de forma responsável, mantendo a funcionalidade dos sistemas naturais às gerações atuais e futuras. Na Amazônia, formas históricas de uso do solo têm comprometido o padrão de cobertura e diversidade florestal. O Estado do Pará apresentou, de 2004 a 2012, as maiores taxas de desflorestamento na região, contabilizando 22% do Estado, resultando em reduções na biodiversidade e, consequentemente, no aumento de paisagens degradadas. Neste contexto, a silvicultura de espécies nativas apresenta-se como atividade potencialmente mitigadora, recompondo áreas alteradas, tornando-as produtivas, contribuindo com a conservação genética, a manutenção de serviços ambientais e a geração de emprego e renda. Para alcançar produções eficientes e eficazes existem pressupostos fundamentais, como identificação de material genético de alto rendimento, espécies compatíveis às condições edafoclimáticas, aspectos silviculturais e ecológicos das espécies. Neste trabalho, objetivou-se identificar condições topoclimáticas preferenciais ao paricá (Schizolobium parahyba var. amazonicum (Huber ex. Ducke) Barneby), espécie nativa da Amazônia, plantada em escala comercial no Brasil, para fim de laminação e seus derivados. Foram utilizadas informações georreferenciadas de ocorrências naturais e avaliadas as condições topoclimáticas predominantes nessas ocorrências. Para identificar faixas preferenciais foram aplicadas técnicas multivariadas, considerando as evidências obtidas em campo. Utilizando soluções de álgebra de mapas em ambiente de Sistema de Informação Geográfica (SIG) realizaram-se integrações de variáveis topobioclimáticas, selecionando as faixas preferenciais e limitantes à espécie. Como resultado, obteve-se o zoneamento indicando três zonas, com alto, médio e baixo potencial ao paricá, no Pará. As análises subsequentes foram realizadas utilizando dados de campo em plantios de paricá, no município de Dom Eliseu, no sudeste do Pará. Foram realizadas classificações digitais supervisionadas, utilizando imagens orbitais LANDSAT/TM-5 de 2010 para identificar padrões de uso e cobertura do solo no município. Os plantios de paricá foram espacializados no mapa de zoneamento de potencialidades do município, o que possibilitou a análise de respostas em NDVI (Normalized Difference Vegetation Index) extraídos do sensor remoto MODIS (Moderate Resolution Imaging Spectroradiometer), em diferentes períodos de deficiência hídrica (CAD 300 mm), aplicando-se teste de média e análise de perfil por meio de técnicas uni e multivariadas. Verificou-se que existe tendência no vigor do paricá, com decrescimento de 0,85 a 0,68, nos meses de maior deficiência hídrica, bem com diferenças significativas entre os plantios nas áreas de alto e médio potencial. Além disso, diferenças no incremento dendrométrico na transição do período seco para o chuvoso foram avaliadas em nível de significância de 5%. A partir dos resultados, quatro cenários silviculturais foram estabelecidos, considerando forças motrizes na cadeia produtiva do paricá. As áreas com alto potencial topoclimático expressam respostas espectrais mais elevadas, indicando maiores ofertas hídricas no solo, ao paricá. Cenários de plantios florestais nas zonas de alto potencial são evidências de maximização de ganhos econômicos, sociais e ambientais. Espera-se, com esses resultados, subsidiar estratégias de redução de riscos em plantios de espécies nativas para consolidar uma economia de baixa emissão de carbono na Amazônia, em conformidade com atual Código Florestal. / Today\'s greatest challenge is to meet the growing demand for raw materials in a responsible way, maintaining the functionality of the natural systems for actual and future generations. In Amazon, historically the different uses of the land have damaged the standards of forest covering and diversity. The State of Para showed, from 2004 to 2012, the biggest deforestation rates in the region, accounting for 22% of the state, resulting in biodiversity losses and, consequently, in the increase of degraded landscapes. Therefore, the silviculture of native species presents a potentially mitigating activity, recovering modified areas, turning them productive, contributing to the conservation genetics, to the maintenance of environmental services and the creation of jobs and income. To achieve an efficient and effective production there are fundamental assumptions like the identification of high yield genetic material, of species compatible with the edaphoclimatic conditions, of the silvicutural and ecology aspects of the species. This paper aims to identify preferential topoclimatic conditions for the parica (Schizolobium parahyba var. amazonicum (Huber ex. Ducke) Barneby), a native species of the Amazon planted in large-scale in Brazil, for wood-laminating and derivatives. Georreference information of natural occurrence was used and the topoclimatic conditions prevailing in these occurrences were evaluated. To identify preferential rates multivariate techniques were applied considering the evidence obtained on the field. Using solutions of algebra maps on a Geographic Information System platform (SIG), integrations of topoclimatic variables were realized selecting preferred and limiting ranges to the species. As a result, we obtained the zoning showing three zones, of low, medium and high potential for the parica, in the State of Para. The subsequent analyses were realized using field data of parica plantation in the municipality of Dom Eliseu, in southeastern Para. Supervised digital classifications were realized using the orbital images LANDSAT/TM-5 of the 2010 to identify the patterns of land use and land cover in the municipality. The parica plantations were spatialized on zoning map to potential of municipality which made possible the analysis of the NDVI (Normalized Difference Vegetation Index) answers extracted from the MODIS (Moderate Resolution Imaging Spectroradiometer) remote sensor, in different periods of water deficit (AWC 300mm), applying a test of average and a profile analysis, using univariate and multivariate techniques. A tendency has been found in the parica vigor with a decrease from 0.85 to 0.68, in the months of greater water deficit, as well as differences between plantings in areas of high potential and those of medium potential. In addition, differences in dendrometric increase, in the transition of dry to rainy season, have been evaluated in a significance level of 5%. From this result, four silvicultural scenarios were established considering the driving forces in the parica\'s production chain. The high potential topoclimatic areas express higher spectral answer, indicating a higher water supply in the soil for the parica. Scenarios of forest plantation in high potential zones are evidences of economic, social and environmental gains maximization. With those results, we hope to subsidize strategies of risk reduction in plantings of native species to consolidate an economy of low carbon emission in the Amazon, in conformity with the current Forest Code.
10

Ethnographie des relations de cohabitation dans un quartier du centre-ville de Marseille

Boucher Guèvremont, Sarah January 2007 (has links)
Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.

Page generated in 0.5467 seconds