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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.
61

Os impactos do Programa Nacional de Alimentação Escolar sob a ótica da multifuncionalidade da agricultura familiar - estudo de caso na região de Ourinhos / The impact of the National School Feeding Programme from the perspective of multifunctionality of family agriculture - case study in the Ourinhos region

Rodrigo Beccheri Cortez 03 February 2017 (has links)
O mercado de compras institucionais, que exerce papel relevante para o desenvolvimento local e para o fortalecimento da agricultura familiar em todo o país, teve, através da Lei 11.947/2009, um incremento substancial: a partir de sua vigência, em 2010, esta lei, que delimita as diretrizes do Programa Nacional de Alimentação Escolar, determinou que ao menos 30% das verbas federais destinadas para a compra da alimentação escolar da rede escolar dos municípios e dos estados, devem ser utilizadas para compras diretas da agricultura familiar, de assentados da reforma agrária de povos e comunidades tradicionais. Com tal medida, abriu-se um mercado institucional de R$ 3,8 bilhões por ano a estes atores, responsáveis pela produção de 70% dos alimentos básicos do país, segundo dados do IBGE. Além da possibilidade de incremento de renda, a comercialização para o PNAE estimula a agricultura familiar a organizar-se de forma coletiva, via associações e cooperativas, e a ocupar um espaço de destaque junto à sociedade e ao setor público, através do reconhecimento e da valorização de seus múltiplos papéis como a produção de alimentos saudáveis e segurança alimentar, da preservação do meio ambiente e da manutenção de tradições sociais e culturais do campo. Os recursos do PNAE para os municípios e estados variam de acordo com o número de alunos na rede pública. As escolas, por sua vez, através do setor de nutrição, elaboram seus cardápios, prioritariamente em sintonia com as tradições alimentares regionais e com a produção da agricultura familiar local, definindo os produtos que serão adquiridos anualmente. Este estudo, desenvolvido na região do Médio Paranapanema nos municípios paulistas de Ourinhos, Chavantes e Salto Grande, teve como objetivo central verificar os impactos do PNAE sobre os agricultores familiares, considerando-se a ótica da multifuncionalidade. Para tanto, além das revisões bibliográficas, foram realizadas entrevistas com 17 representantes do setor público (das secretarias de educação e de agricultura, dos setores de alimentação escolar e de compras e dos serviços da assistência técnica e extensão rural nos municípios) e visitas ao centro de distribuição de alimentos de Ourinhos, às cozinhas municipais de Chavantes e de Salto Grande e a 21 unidades de produção familiar. Junto às famílias de agricultores familiares, foram realizadas 56 entrevistas durante visitas à seus estabelecimentos. Com o decorrer da pesquisa foi possível verificar a construção das relações institucionais entre prefeituras e agricultores, bem como as principais dificuldades e conquistas encontradas nesta empreitada. Por sua vez, junto aos agricultores, foram verificados alguns impactos do PNAE sobre a preservação do meio ambiente sobre a paisagem, bem como sobre as técnicas produtivas e suas relações com a segurança alimentar e produção de alimentos saudáveis. O PNAE, por fim, exerceu forte impacto sobre a renda das famílias, o que, por sua vez, se refletiu positivamente sobre o aspecto de manutenção do tecido social e cultural e, mais fortemente, sobre as questões de reprodução social e econômica das famílias, gerando novos arranjos na distribuição de trabalho entre os membros da família, com novas e melhores perspectivas para as mulheres e para os jovens. / The market institutional purchases, which plays an important role in local development and the strengthening of family farming throughout the country, had, through the Law 11947/2009, a substantial increase: from its term in 2010, this law which defines the guidelines of the National school feeding Programme, determined that at least 30% of federal funds intended for the purchase of school meals the school network of municipalities and states, should be used to direct purchases of family farming, the settlers agrarian reform peoples and traditional communities. It opened up an institutional market of R $ 3.7 billion a year to these actors, responsible for producing 70% of basic food of the country, according to IBGE data. Besides the possibility of income growth, marketing for PNAE allows family farmers to organize themselves collectively through associations and cooperatives, and occupy a prominent space in the society and the public sector, through the recognition and appreciation of their key role on the production of healthy food and food security, preserving the environment and maintaining social and cultural traditions of the field. The PNAE resources to municipalities and states vary according to the number of students in the public local network. Schools, in turn, through the nutrition sector, develop their menus, primarily in line with the regional food traditions and the production of local family farms, and define the products to be purchased annually. This study was developed in the Middle Paranapanema region in the tows of Ourinhos, Chavantes and Salto Grande, had as its central objective to verify the PNAE\'s impacts on farmers, considering the perspective of multifunctionality. Therefore, in addition to literature reviews, interviews were conducted with 17 people from the public sector (with the education departments, agriculture departments, school feeding sector, purchasing department and technical assistance and rural extension in the municipalities), visits to the center Ourinhos distribution of food and municipal kitchens Chavantes and Salto Grande and especially visits to 21 family production units, where each establishment became a cross walk. With families of farmers were conducted 56 interviews. In the course of the research it was possible to verify the construction of institutional relations between municipalities and farmers, as well as the main difficulties and achievements found in this endeavor. Turn to farmers, there was some PNAE impacts on the preservation of the environment and the landscape, as well as the production techniques and their relationship with food security and healthy food production. The PNAE finally had a strong impact on household income, which, in turn, is positively reflected on the aspect of maintaining the social and cultural fabric and more strongly on issues of social and economic reproduction of families, generating new arrangements in the distribution of work among family members, with new and better prospects for women and young people.
62

A identidade territorial como estratégia de planejamento do turismo rural: interfaces entre o Vale dos Vinhedos e o Alto Douro Vinhateiro / The territorial identity as planning strategy of the rural tourism: interfaces between the Vale dos Vinhedos and the Alto Douro Vinhateiro

Tiaraju Salini Duarte 21 November 2016 (has links)
A pesquisa intitulada a identidade territorial como estratégia de planejamento do turismo rural: Interfaces entre o Vale dos Vinhedos e o Alto Douro Vinhateiro tem por objetivo analisar, a partir das regiões representativas citadas, se as construções identitárias podem contribuir para planejamento territorial do Turismo Rural no Brasil. Parte-se do princípio que este segmento se apresenta atualmente como uma estratégia de desenvolvimento do rural que cresce significativamente na contemporaneidade e necessita de políticas de planejamento. Partindo desse prisma, a hipótese deste trabalho centra-se no pressuposto que a forma de organização adotada para o turismo rural no Brasil não está suprindo as demandas necessárias para a consolidação deste setor. Este contexto vem contribuindo para a manutenção de um modelo imediatista de turismo que só será superado tendo como princípio um planejamento assentado nas identidades territoriais. Nosso caminho metodológico para compreender este fenômeno centra-se na perspectiva de analisar o mesmo como uma pratica socioespacial que possuiu dinâmicas próprias, as quais estão intimamente relacionadas a emergência da ruralidade como uma construção centrada na autopoieses rural. Esta apresenta-se como um forte atrativo turístico, tendo em vista os novos olhares lançados ao rural brasileiro. Como universo empírico de pesquisa elencou-se duas regiões que se utilizam da identidade territorial para construir as estratégias de planejamento: O Vale dos Vinhedos, localizado no estado do Rio Grande do Sul/Brasil e o Alto Douro Vinhateiro, localizado no norte de Portugal. A partir deste universo de análise foi possível compreender as formas que ambas regiões pensam o turismo rural, os conflitos oriundos desta prática bem como as possíveis organizações que são arquitetadas para este setor. Com base nestas discussões, partiu-se para a análise do turismo rural no Brasil, visando problematizar as políticas que este país vem adotando dentro da esfera de ordenamento territorial; as leis que regem este segmento e a inserção do mesmo nos Planos Nacionais de Turismo. Concluiu-se que o território nacional ainda carece de um planejamento voltado ao turismo rural, tendo em vista as confusões teóricas acerca deste setor nas diversas escalas de planejamento. Além disso constatou-se uma ausência de integração dos roteiros municipais, a ascensão de diversos atores que falsificam as ruralidades e uma legislação na escala nacional e municipal que não contribui para a consolidação deste setor. Por conseguinte, é proposto um Plano Nacional de Turismo Rural centrado em quatro pilares: a identidade territorial como principal estratégia para organizar os roteiros; a regionalização do turismo a partir da intermunicipalidade; a multifuncionalidade da agricultura e a construção de Áreas de Proteção do Turismo Rural. / The research entitled The territorial identity as planning strategy of the rural tourism: Interfaces between the Vale dos Vinhedos and the Alto Douro Vinhateiro it aims to analyse, from the representative regions cited, if the identity constructions can contribute for the rural planning of the Rural Tourism in Brazil. Part of it is assumed that this segment is now present as a rural development strategy that grows up significantly currently and needs planning politics. From this perspective, the hypothesis of this work focuses on the assumption that the adopted form of organization for rural tourism in Brazil is not supplying the necessary demands for the consolidation on this sector. This context has been contributing for the maintenance of a immediatist model of tourism that will only be overcome first taking a seated planning in territorial identities. Our methodological approach to understand this phenomenon focuses on the perspective of analyzing the same as a sociospatial practice that owned their own dynamics, which are closely related to the emergency of rurality as a construction focused on rural autopoiesis. This is presented itself as a strong tourist attraction, in view of the new looks thrown into the brazilian rural. As empirical universe of research has listed two regions that use of territorial identity to build the planning strategies: The Vale dos Vinhedos, located in the state of Rio Grande do Sul/Brazil and the Alto Douro Vinhateiro, located in the north of Portugal. Starting from this universe of analysis it was possible to understand the ways that both regions think the rural tourism, the conflicts resulting from this practice as well as the possible organizations that are architected for this sector. Based on this discussions, departed to the analysis of the rural tourism in Brazil, aiming to problematize the politics that this country has taken in the ordainment territorial sphere; the laws governing this segment and the insertion of the same in the National Tourism Plan. It was concluded that the national territory still lacks a planning directed to rural tourism, in view of the theoretical confusions about this sector in the several planning scales. Besides this it was evidenced an absence of the integration of the municipal itineraries, the ascension of several actors who falsify the ruralities and a legislation at the national and municipality scale that does not contribute to the consolidation of this sector. Therefore, it is proposed a Rural Tourism National Plan centered on four pillars: the territorial identity as the main strategy to organize the itineraries; the regionalization of tourism from the intermunicipality; the multifunctionality of the agriculture and the construction of Protection Areas of the Rural Tourism.
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ÁGUA E MULTIFUNCIONALIDADE DA AGRICULTURA: UMA ANÁLISE A PARTIR DOS ORIZICULTORES DE CACEQUI RS / MULTIFUNCTIONALITY OF THE AGRICULTURE AND WATER: AN ANALYSIS OF RICE PRODUCERS FROM THE CACEQUI - RS

Soares, Nádia Bolzan 29 August 2008 (has links)
The multifunctional approach of the agriculture articulates genuinely with the premises institutionalized by the current National Politics of Water Resources, which both result of a logic that looks for to assist to the forts social appeals for the environmental protection and for practices returned to the maintainable development. Before these events, this dissertation approaches as the segment of irrigate rice producers, one of the main users of water resources, they notices the new social demands on the rural, more specifically the environmental. Also it approaches the potential that the adoptions of an economical instrument in the administration of the water tend to influence the users to seek maintainable forms of use of this resource, promoting changes attitudinal in their agricultural practices. The investigation universe was composed by twenty rice producer with farms located in the municipality of Cacequi/RS, which it bases the larger part of its financial income based in the production of irrigated rice. As methodological contribution was used the qualitative approach tends as tools of collection of data through the use of questionnaires and the accomplishment of semi-structured interviews. The study showed that the majority of the rice producers consider the environmental function of the farmer as merely legal obligation. Also it is noticed that, case did not have a rigid legislation and, mainly, if it not intimately harnessed to the monetary logic, it had little change there would be in the posture of these people front to their professional practices that they interfere negatively in the ambient. Although the majority of the irritant rice producers agree that the subject of the water deserves cares, in general, they disagree with the new juridical ordainment that it regulates the use of such a natural resource. The interviewees rice producers evaluate the charge for the reception and use of the water as an instrument merely ornament and without practical efficacy. The great difficulty of this segment of to perceive the agriculture for a logic multifunctional, that it goes besides the production of foods capable to contemplate other functions for the farmer and the agriculture in the contemporary world. The logic that is guiding these rice producers is still of the agriculture as mere cutting of the sectoral economy. / A abordagem multifuncional da agricultura articula-se genuinamente com as premissas institucionalizadas pela atual Política Nacional de Recursos Hídricos, sendo ambas resultado de uma lógica que busca atender aos fortes apelos sociais pela proteção ambiental e por práticas voltadas ao desenvolvimento sustentável. Frente a esta conjuntura, a presente dissertação aborda como o segmento de orizicultores irrigantes, um dos principais usuários de recursos hídricos, percebe as novas demandas sociais sobre o rural, mais especificamente a ambiental. Também busca analisar empiricamente o potencial que a adoção de um instrumento econômico na gestão das águas tem de influenciar os usuários a buscarem formas mais sustentáveis de uso deste recurso, promovendo mudanças atitudinais em suas práticas agrícolas. O universo de investigação foi composto por vinte orizicultores com lavouras situadas no município de Cacequi/RS, o qual baseia grande parte de sua receita financeira pautada na produção de arroz irrigado. Como aporte metodológico utilizou-se a abordagem qualitativa tendo como ferramentas de coleta de dados o uso de questionários e a realização de entrevistas semi-estruturadas. O estudo mostrou que a maior parte dos orizicultores trata a função ambiental do agricultor meramente como uma obrigatoriedade legal. Também se pôde perceber que, caso não houvesse uma rígida legislação e, principalmente, se esta não estivesse intimamente atrelada à lógica monetária, haveria pouca mudança na postura destes sujeitos frente às suas práticas profissionais que interferem negativamente no ambiente. Embora a maior parte dos orizicultores concorde que a questão da água merece cuidados, de modo geral, mostram-se inconformados com o novo ordenamento jurídico que regula o uso de tal recurso natural. Os orizicultores entrevistados avaliam a cobrança pela captação e uso da água como um instrumento meramente arrecadatório e sem eficácia prática. Transparece a grande dificuldade deste segmento de vislumbrar a agricultura por uma lógica multifuncional, que vá além da produção de alimentos, capaz de contemplar outros papéis para o agricultor e a agricultura no mundo contemporâneo. A lógica que está orientando estes orizicultores ainda é a da agricultura como mero recorte setorial da economia.
64

La valorisation des déchets organiques dans l'agriculture "péri-urbaine" à Dakar (Sénégal) : analyse d'une multifonctionnalité stratégique / The valorization of organic waste in "peri-urban" agriculture in Dakar (Senegal) : analysis of a strategic multifunctionality

Tounkara, Sidy 24 November 2015 (has links)
L’objet de cette thèse est d’analyser la double question de l’intégration ou de l’effacement progressif de l’agriculture dans la ville de Dakar et la valorisation agricole des déchets organiques urbains. Le premier aspect pose d’emblée la question de la gouvernance territoriale de l’action publique locale. Le second aspect renvoie à la multifonctionnalité de l’agriculture dans un contexte d’écologisation des activités humaines pour protéger l’environnement. Comment les maraîchers de Dakar s’adaptent-ils à cette double préoccupation ? La multifonctionnalité agricole peut-elle contribuer au maintien et au renforcement de l’activité maraîchère ? Ces questions ont été abordées en adoptant une approche interdisciplinaire croisant en particulier la sociologie et la géographie. Nous faisons l’hypothèse que cette nouvelle fonction environnementale de l’agriculture « péri-urbaine » constitue une opportunité pour les maraîchers de Dakar pour développer des stratégies d’adaptation au contexte local et au projet d’écologisation du secteur agricole. Une approche géographique de l’espace des Niayes (de Dakar) a fait apparaître que les pratiques agricoles sont largement déterminées par les caractéristiques de ce milieu soumis à une anthropisation renforcée par l’urbanisation. Nous montrons aussi que la mise en agenda des problèmes agricoles en ville à Dakar ressemble plus à de l’affichage politique qu’à une réelle inscription dans le projet urbain. Enfin, il existe des facteurs bloquants à surmonter pour « intensifier écologiquement » les systèmes de production agricole. Certains de ces facteurs trouvent leur origine dans l’inscription des pratiques agricoles dans le système socio-culturel local et dans le rapport des maraîchers avec le « monde » scientifique et les questions d’environnement. / The purpose of this thesis is to analyze the double issue of integration or the gradual disappearance of agriculture in the city of Dakar and the agricultural use of urban organic waste. The first aspect raises immediately the question of territorial governance of local public action. The second aspect refers to the multifunctionality of agriculture in the context of greening of human activities to protect the environment. How do gardeners adapt to this double concern: to maintain agriculture in city and promote urban organic waste? How can agricultural multifunctionality contribute to maintain and strengthen gardening activity? These issues were tackled by adopting an interdisciplinary approach crossing especially sociology and geography. We suppose that this new environmental function of “peri-urban” agriculture is an opportunity for gardeners in Dakar to develop strategies for adaptation to the local context and to the project of greening of agriculture. A geographical approach of Niayes’ space (Dakar) showed that agricultural practices are largely determined by the characteristics of this environment under human transformation reinforced by urbanization. We show also that the agenda of agricultural development problems in the city Dakar is likely to display political than an actual entry in the urban project. Finally, it remains blocking factors to overcome for “environmentally intensify” the systems of production of agriculture. Some of these factors are based on the registration of agricultural practices in the local socio-cultural system and the relations that gardeners have with the scientific “world” and environmental issues.
65

Obytný soubor Brno - Červený kopec / The residential area in Brno - Červený kopec

Berousková, Dana January 2013 (has links)
This thesis shows the analysis and understanding of the locality Brno – Cerveny kopec and the subsequent drafting of a new urban fabric new urban fabric, which is used mainly for housing. The new proposal responds to the surrounding buildings and terrain slope. Complements, so that shaped the existing buildings one and emphasized the quality of the desired. location. There is an emphasis on high quality living close to green
66

Förutsättningar för implementering av mångfunktionella grönblå strukturer : En kvalitativ studie av Hyllie i Malmö stad / Prerequisites for implementation of multi-functional green-blue structures : A qualitative study of Hyllie in the city of Malmö

Jansson, Hanna January 2020 (has links)
Stadsplanerare står inför framtida utmaningar med fortsätt förtätning av städer och ökade risker i och med klimatförändringarna. För att få plats för alla samhällsfunktioner som behövs i de kompakta städerna, däribland klimatanpassningsåtgärder, finns det ett behov av mångfunktionella lösningar. Grönblå infrastruktur har en mångfunktionell karaktär och kan användas för att kombinera hantering av översvämningar, värmeböljor och andra samhällsfunktioner i samma lösningar. Trots att dessa fördelar är tydliga i forskningen kvarstår det svårigheter i att implementera lösningarna i praktiken. Syftet med denna uppsats är att studera förutsättningar för implementering av mångfunktionella grönblå lösningar. Detta har gjorts i tidigare studier, men inte med fokus på planering av nya stadsdelar, vilket kommer vara fokus i denna studie där stadsdelen Hyllie i Malmö används som studieobjekt. Analysen grundas på kvalitativa semistrukturerade intervjuer med tjänstemän från olika avdelningar på kommunen som är involverade i stadsplaneringen. Resultatet visar att de främsta förutsättningarna för implementering är väl fungerande samverkan, kunskap, regleringsmöjligheter, finansiella resurser och politiskt stöd för prioritering av grönblå strukturer. För att förbättra dessa förutsättningar finns det möjligheter för kommunen att utveckla samverkan inom organisationen och med utomstående aktörer och gå mot mer förenade mål och gemensamt ansvar. En annan möjlighet är att genom arbetet i pilotprojekt utveckla nya lösningar för reglering samt öka kunskapen om grönblå strukturer. Här är utmaningen att integrera erfarenheterna i projekten i kommunens kärnarbete. / Urban planners will have to handle future challenges due to the densification of cities and the increased risks resulting from climate change. In order to accommodate all the community functions needed in the compact cities, including climate adaptation measures, there is a need for multifunctional solutions. Green-blue infrastructure is multifunctional in its nature and can be used to combine management of floods, heat waves and other community functions in the same solutions. Although these benefits are clear in research, difficulties remain in implementing the solutions in practice. The aim of this paper is to study the prerequisites for implementing multifunctional green-blue solutions. This has been done in previous studies, but not with a focus on planning new neighbourhoods, which will be the focus of this study where the Hyllie district in Malmö is used as a study object. The analysis is based on qualitative semi-structured interviews with officials from various departments of the municipality who are involved in urban planning. The results show that the main prerequisites for implementation are well-functioning collaboration, knowledge, regulatory opportunities, financial resources and political support for prioritizing green-blue structures. To improve these conditions, there are opportunities for the municipality to develop collaboration within the organization and with external actors and move towards more unified goals and shared responsibility. Another possibility is to work with pilot projects to develop new solutions for regulation and to increase the knowledge of green-blue structures. Here, the challenge is to integrate the experience of the projects into the municipality's core work.
67

Konverze uvolněných hospodářských objektů zámku, Žďár nad Sázavou / Conversion of freed castle original facility(service) buildings, Zdar nad Sazavou

Boiko, Svitlana January 2017 (has links)
An extensive historical estate of the Kinsky family connected with the Žďár nad Sázavou monastery and create a remarkable set of cultural and natural heritage. Monastery owners, the Kinsky family, are seeking for a long time to evaluate this legacy, and therefore, has recently decided to prepare concrete reflection on the development and rehabilitation of the monastery and its accessories by preparing a global strategy for the concept of building development and its tourist use. The ambition of the Kinsky family is to develop in Žďárka a project of an important monument and Cultural center with European fame. Their will is to create from this place an important example of cultural and tourist development beyond the territory The presence of a unique collection of Baroque culture and architectural monuments from the Jan Blažej Santini (pilgrimage church of St. John of Nepomuk, The Monastery, the Abbey, the Church of the Assumption of Virgin Mary, the Riding Hall, the Cemetery, the Lyra Farm, the Chateau) make this area a unique monument and an important cultural heritage of the Czech Republic. The area of the monastery with its surroundings opens the strong potential of free space in the remarkable historical buildings capable of transforming cultural, tourist and commercial functions of all types: cultural events, expositions and exhibitions, seminars, accommodation, restaurant operations. Recently, the topic of the public cultural space has become more recent. These are new cultural buildings where people can meet, have fun and learn every day, spend their free time every day. Earlier, communism times fulfilled this function with cultural buildings. But modern life dictates new demands and functions of public space. Today it assumes more interactive space than before. Person works with space and architecture, engaging in activities. A new urban space is emerging, which opens up for a full-day multifunctional use - a cultural area. On the basis of the analysis of the solved territory, a proposal dealing with the whole locality of economic premises of the monastery was elaborated as a complex whole whose main aim was to create a functional and aesthetic environment. The site is situated in the area of the Cistercian monastery, which is located between two ponds. Next to the monastery there is a public transport stop and a public car parking. Design territory is defined by the monastery's backyard area. In addition, there is a functioning elementary school. The project is based on minimalism and respect for the place. Combined with the historical basis of the complex, a new cultural unit will be created. The cultural center is multifunctional, which corresponds to a simple and clearly arranged operation allowing for a wide range of cultural and educational activities, which can be attended by both: tourists and children from the local elementary school. The proposed multifunctional cultural facility meets the basic requirements for organizing cultural events of diverse character, such as theater, film and music performances, shows, balls, dance and sports courses and other social activities. It also provides facilities for families, mothers with children and open-air events during the summer months.
68

Species identity and the functioning of ecosystems: the role of detritivore traits and trophic interactions in connecting of multiple ecosystem responses

Hines, Jes, Eisenhauer, Nico 05 April 2023 (has links)
Ecosystems world-wide experience changes in species composition in response to natural and anthropogenic changes in environmental conditions. Research to date has greatly improved our understanding of how species affect focal ecosystem functions. However, because measurements of multiple ecosystem functions have not been consistently justified for any given trophic group, it is unclear whether interpretations of research syntheses adequately reflect the contributions of consumers to ecosystems. Using model communities assembled in experimental microcosms, we examined the relationship between four numerically dominant detritivore species and six ecosystem functions that underpin fundamental aspects of carbon and nitrogen cycling aboveand below-ground. We tested whether ecosystem responses to changes in detritivore identity depended upon species trait dissimilarity, food web compartment (aboveground, belowground, mixed) or number of responses considered (one to six). We found little influence of detritivore species identity on brown (i.e. soil-based) processes. Only one of four detritivore species uniquely influenced decomposition, and detritivore species did not vary in their influence on soil nitrogen pools (NO3 − and NH4 +), or root biomass. However, changes in detritivore identity influenced multiple aboveground ecosystem functions. That is, by serving as prey, ecosystem engineers and occasionally also as herbivores as well as detritivores, these species altered the strength of aboveground predator–herbivore interactions and plant–shoot biomass. Yet, dissimilarity of detritivore functional traits was not associated with dissimilarity of ecosystem functioning. These results serve as an important reminder that consumers influence ecosystem processes via multiple energy channels and that food web interactions set important context for consumer-mediated effects on multiple ecosystem functions. Given that species are being lost, gained and redistributed at unprecedented rates, we can anticipate that changes in species identity will have additional ecosystem consequences beyond those predicted by species’ primary functional role.
69

Exploring spin in novel materials and systems

Fang, Lei 21 March 2011 (has links)
No description available.
70

[pt] NA TRILHA DAS RESERVAS PARTICULARES DO PATRIMÔNIO NATURAL (RPPN): DINÂMICAS TERRITORIAIS PRODUTORAS DE PAISAGENS NO ESTADO DO RIO DE JANEIRO / [en] ON THE TRAIL OF THE PRIVATE RESERVES OF NATURAL PATRIMONY (RPPN): TERRITORIAL DYNAMICS GENERATING LANDSCAPES IN THE STATE OF RIO DE JANEIRO

ELTON SIMOES GONCALVES 17 December 2019 (has links)
[pt] Desde a Conferência das Nações Unidas sobre o Meio Ambiente e o Desenvolvimento (Eco-92), diferentes dispositivos regulatórios, alinhados a emergentes diretrizes de ordenamento territorial e ambiental, foram elaborados para disciplinar os usos da terra no espaço rural nacional, com repercussões específicas em cada unidade da federação. Nesse contexto, o presente trabalho analisou as dinâmicas territoriais responsáveis pela expansão de Reservas Particulares do Patrimônio Natural (RPPN) no estado do Rio de Janeiro. As redefinições paisagísticas derivaram de práticas espaciais indicativas de novas territorialidades, (re)funcionalizações e ressignificações do espaço rural fluminense. Enfoques metodológicos qualitativo e misto foram adotados para a interpretação de dados secundários e primários, estes últimos recolhidos em campo a partir de uma amostra de cinquenta proprietários rurais. Os resultados caracterizaram uma trama de intencionalidades e compensações responsáveis por mudanças nos mosaicos regionais de uso e cobertura da terra, tais como: o incremento de áreas florestais para preservação, remuneração por serviços ambientais e consumo turístico da paisagem rural. O crescimento de unidades de conservação privadas foi favorecido por conjunturas sócio-políticas a partir das quais identificamos uma particular densidade institucional de processos territorializantes, representados pela permeabilidade de projetos, programas – ICMS Ecológico, Produtor de Águas e Florestas, Conexão Mata Atlântica, Rio Rural, Programa de Incentivo às RPPNs, dentre outros – e agentes direta ou indiretamente envolvidos – APN/RJ, SERPPN, ICMBio, AMLD e outros – na difusão da referida categoria de área protegida, incentivando, portanto, novos caminhos para o desenvolvimento e a sustentabilidade no espaço rural fluminense. / [en] Since the United Nations Conference on Environment and Development (Eco-92), different regulatory mechanisms, in line with emerging territorial and environmental planning guidelines, have been developed to discipline land uses in the national countryside, with specific repercussions on each unit of the brazilian federation. In this context, the present work analyzed the territorial dynamics responsible for the expansion of Private Reserves of Natural Patrimony (RPPN) in the Rio de Janeiro state. The landscape redefinitions were derived from spatial practices indicative of new territorialities, (re) functionalisations and re-significances of the countryside. Qualitative and mixed methodological approaches were adopted for the interpretation of secondary and primary data, collected from a sample of fifty rural landowners. The results identified a network of intentions and compensations responsible for changes in the regional land use and land cover mosaic, such as: the increase of forest areas for preservation, remuneration for environmental services and tourism consumption of the rural landscape. The growth of private conservation units was favored by socio-political conjunctures from which we identified a particular institutional density of territorial processes, represented by the permeability of projects, programs - ICMS Ecológico, Produtor de Águas e Florestas, Conexão Mata Atlântica, Rio Rural, Programa de Incentivo às RPPN, among others - and agents directly or indirectly involved - APN / RJ, SERPPN, ICMBio, AMLD - in the diffusion of this category of protected area, encouraging new paths for development and sustainability in rural areas of Rio de Janeiro state.

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