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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.
241

Os mineiros da floresta = sociedade e trabalho em uma fronteira de mineração industrial amazônica (1943-1964) / The miners of the forest : a society and work in the Amazon frontier mining industry (1943-1964)

Paz, Adalberto Júnior Ferreira, 1981- 18 August 2018 (has links)
Orientador: Fernando Teixeira da Silva / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciências Humanas / Made available in DSpace on 2018-08-18T02:49:40Z (GMT). No. of bitstreams: 1 Paz_AdalbertoJuniorFerreira_M.pdf: 2608421 bytes, checksum: 973fa4a13050ef2af98bdd45f8e8d52b (MD5) Previous issue date: 2011 / Resumo: Em meados da década de 1940, no extremo norte do país, iniciavam-se os preparativos para a instalação do primeiro projeto de exploração mineral industrial na Amazônia. Este empreendimento relacionava-se com as diretrizes políticas, econômicas e estratégicas estabelecidas durante o Estado Novo para várias regiões do país tidas como periféricas e atrasadas em relação aos centros dinâmicos da economia nacional. Dessa forma, segundo o discurso oficial, a exploração das jazidas de manganês na região de Serra do Navio, situadas no interior do Território Federal do Amapá, criaria as condições necessárias para o desenvolvimento dessa importante área de fronteira, ao mesmo tempo em que contribuiria para a formação de uma verdadeira "civilização equatorial". Contudo, a implantação dessa nova sociedade exigiria a reestruturação dos padrões de sociabilidade vigentes entre uma população basicamente voltada para o extrativismo. Assim, os impactos sobre essa organização social e as diversas transfomações ocorridas naquele território, entre as década de 1940 e 1960, são analisados tomando como referência a montagem daquele complexo mineral-exportador, que se destaca por ter projetado duas company towns no interior da floresta amazônica, com as quais a empresa Indústria e Comércio de Minérios S.A. pretendia obter um tipo específico de trabalhador e de família, formando comunidades orientadas por princípios de harmonia entre capital e trabalho / Abstract: In the mid-1940s, in the extreme north of the country, began the preparations for the installation of the first industrial mineral exploration project in the Amazon. This development was related to policy guidelines, economic and strategic established during the New State to various regions of the country regarded as peripheral and lagging behind the dynamic centers of the national economy. Thus, according to the official discourse, the exploitation of manganese nodules in the region of Serra do Navio, located within the Federal Territory of Amapá, would create the necessary conditions for the development of this important border area, while it would help to the formation of a true "equatorial civilization." However, the implementation of the new society would require restructuring the existing patterns of sociability among a population largely focused on the extraction. Thus, the impacts on the social organization and various transformations occurred in that territory, between the 1940 and 1960, are analyzed with reference to the assembly of that complex mineral-exporter, which stands out for having designed two company towns in the forest Amazon, with whom the company Indústria e Comércio de Minérios S.A was seeking a specific type of worker and family, forming communities guided by principles of harmony between capital and labor / Mestrado / Historia Social / Mestre em História
242

A medida da floresta : as viagens de exploração e demarcação pelo "Pais das Amazona" (Seculos XVII e XVIII) / The extent of the forest : voyages of exploration and demarcation through the " Country of the Amazons" - 17th-18th centuries

Camilo, Janaina Valeria Pinto 08 June 2008 (has links)
Orientador: Paulo Miceli / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciencias Humanas / Made available in DSpace on 2018-08-11T11:51:48Z (GMT). No. of bitstreams: 1 Camilo_JanainaValeriaPinto_D.pdf: 12425818 bytes, checksum: 7a84cc4210e2b03b064760f41a38ad50 (MD5) Previous issue date: 2008 / Resumo: A Amazônia foi revelada para o mundo pelas primeiras informações dos participantes das viagens de Colombo, o italiano Américo Vespúcio e o espanhol Alonso de Ojeda, os quais, segundo a versão espanhola foram os primeiros a chegar, no século XV, às duas saídas do rio Amazonas. Em toda a sua extensão, entretanto, o rio se tornou conhecido dos portugueses apenas a partir da viagem de Pedro Teixeira, que navegou do Pará até Quito, em 1639, contrariando, de modo efetivo, o Tratado de Tordesilhas. Ao longo dos séculos XVII e XVIII, outros viajantes europeus adentraram pelas terras da Floresta densa e pelas águas de seu Grande Rio, compondo com seus relatos valiosas representações dos homens, dos rios e da floresta amazônicos, na maior parte das vezes, fundamentadas em explicações míticas e fantasiosas sobre o El Dorado e as terras dominadas pelas Amazonas ameaçadoras. Este trabalho tenta explicar como os discursos mítico e científico, alimentados pela imaginação e pelas ações de diversas personagens, ajudaram a conformar as dilatadas fronteiras da Amazônia que se tornou brasileira / Abstract: The Amazon Region was revealed to the world by the first information from the participants of Colombo¿s journey, the Italian Americo Vespucio and the Spanish Alonso de Ojeda , who, according to the Spanish versions, were the first to arrive, in the XV century, at the two exits of the Amazon river. In all of its extension, however, the river had only become wellknown of the Portuguese since Pedro Texeira¿s travel, who sailed from Pará to Quito, in 1639, disobeying, effectively, the Tordesilha¿s treat. During the XVII and XVIII centuries, other European travelers went through the Forest lands and its Big River¿s water, composing with their accounts valuable representation of men, rivers and the Amazon Forest, most of the times, based in mystic explanations about the El Dourado and the conquered lands by the dangerous Amazonas. This work tries to explain how the mythical and scientific discourses, supplied by the imagination and actions of diverse characters, have helped to form the dilated frontier of the Amazon Forest, which was made Brazilian / Doutorado / Historia Cultural / Doutor em História
243

Cronoestratigrafia e interpretação paleoambiental de depósitos miocenos da formação Solimões, Região de Coari, AM

Silveira, Rosemery Rocha da 06 October 2005 (has links)
Made available in DSpace on 2015-04-22T21:58:45Z (GMT). No. of bitstreams: 1 Rosemery Rocha da Silveira.pdf: 17329999 bytes, checksum: 05fa61425fbe18295c7dcc746ded03e0 (MD5) Previous issue date: 2005-10-06 / FAPEAM - Fundação de Amparo à Pesquisa do Estado do Amazonas / The Miocene is one of the periods of Earth characterized by pronounced climatic and bioevolutive changes associates to the expressive marine transgressions. In the South America, these events were concomitant with the progressive uplift of Andes cordillera causing significant paleogeographical and paleoenvironmental modifications. In the center-western region of the Amazônia, the palynologic and stratigraphic studies of Miocene Solimões Formation identified two facies associations, unconformably overlain by Pleistocene siliciclastic deposits of Içá Formation: 1) The Association 1- laminated pelite, characterized by grey pelites with concentration of organic matter, related to an lacustrine environment; and 2) Association 2 sandstone and pelite with heterolithic inclined stratification representative of a meandering fluvial system. The continental inflow is indicated by abundance of phytoclast and fresh water algae (Ovoidites). The Neomiocene age for the Solimoes Formation on the Coari region is indicated by occurrence of Echitricolporites spinosus (Superzone X sensu Muller et al., 1997) and confirmed by the presence of Echiperiporites akanthos, it doesn´t reach the Pliocene epoch. Reworked palynomorphs as Crassoretitriletes vanraadshoovenii and Grimsdalea magnaclavata, forms commonly found in the Mesomiocene, confirm the Neomiocene age and the erosive event during Mesomiocene. Additionally, the concomitant erosion of Paleozoic rocks of western border of Amazonas basin is indicated by abundant Neodevonian acritarchs. / O Mioceno representa um dos períodos da evolução da Terra caracterizado por pronunciadas mudanças climáticas e bioevolutivas associadas a expressivas transgressões marinhas. Na América do Sul, estes eventos foram concomitantes com o contínuo soerguimento da Cordilheira dos Andes causando significativas modificações paleogeográficas e paleoambientais no continente. Na região centroocidental da Amazônia, o estudo palinológico e estratigráfico de depósitos miocenos na Formação Solimões, identificou duas associações de fácies, recobertas discordantemente por depósitos pleistocenos da Formação Içá: 1) Associação 1- pelito laminado, caracterizada por pelitos cinza ricos em matéria orgânica, relacionada a um ambiente lacustre; e 2) Associação 2- arenito e pelito com estratificação inclinada heterolítica representativa de um sistema fluvial meandrante. O influxo continental é indicado pela ocorrência de fitoclastos e esporos de algas de água doce (Ovoidites). A idade neomiocena para a Formação Solimões na região de Coari é indicada pela ocorrência de Echitricolporites spinosus (Superzone X sensu Muller et al., 1987) e presença de Echiperiporites akanthos, que não atinge o Plioceno. Palinomorfos transportados como Crassoretitriletes vanraadshoovenii e Grimsdalea magnaclavata, formas comumente encontradas no Mesomioceno, confirmam a idade neomiocena e o evento erosivo durante o Mesomioceno. Além disso, a erosão concomitante de rochas paleozóicas da borda oeste da Bacia do Amazonas é indicada pela abundância de acritarcos neodevonianos retrabalhados.
244

Biogeography and conservation of Amazon palms

Valles, Carlos Mariano Alvez 22 February 2018 (has links)
Submitted by Renata Lopes (renatasil82@gmail.com) on 2018-03-27T19:45:32Z No. of bitstreams: 1 carlosmarianoalvesvalles.pdf: 5972976 bytes, checksum: 908806a8077c5751983d6b9690d566cd (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2018-04-09T19:22:27Z (GMT) No. of bitstreams: 1 carlosmarianoalvesvalles.pdf: 5972976 bytes, checksum: 908806a8077c5751983d6b9690d566cd (MD5) / Made available in DSpace on 2018-04-09T19:22:27Z (GMT). No. of bitstreams: 1 carlosmarianoalvesvalles.pdf: 5972976 bytes, checksum: 908806a8077c5751983d6b9690d566cd (MD5) Previous issue date: 2018-02-22 / - / Palms are abundant in tropical forests and are recognized as effective bioindicators of hot climates. Moreover, play an important ecological and economic role for local populations. Though palms remain relatively well-conserved, they are under increasing pressure from deforestation. Therefore, endemicity is important for the delimitation of conservation areas. The purposes of the study is 1) to synthesize available information in the literature on species diversity, ecological aspects, use and conservation of Amazon palms (Chapter 1); to analyse palms species richness patterns relative to the latitudinal gradient, sample efforts, and deforestation in the Amazon region (Chapter 2); to compare richness and floristic similarities patterns among the Amazonian sub-regions (Chapter 2); to detect endemic areas for palms in the Amazon region (Chapter 3); and to determine whether the species that define these endemic areas are protected within conservation units (Chapter 3). Records of occurrences were extracted from the Global Biodiversity Information Facility (GBIF). The final dataset consisted of 17,310 records, for 177 species of Amazonian palms. The areas with the greatest richness were in the western, central and northeastern Amazon, principally at latitudes 0–5ºS. Most palms species grow in different habitats, but the highest species richness are found in terra firme forest. Palms are widely used with different category of use according to the regions and species, principally are used for human consumption, elaboration of utensils and tools, and construction of houses. Highest rates of deforestation (>2000 km2) were found in the southern and eastern brazilian Amazon, which coincide with low species richness and gaps in records. Similarity analysis resulted in two groups of sub-regions: the first included the Amazon s.s., Andes and Guiana, and the other group included the Plateau and Gurupi sub-region. The combination of PAE and NDM-VNDM analyses resulted in eight endemic palm areas in western Amazon shared with Andean sub-region. Of the species that define the endemic areas, five are threatened with extinction in one of three IUCN categories (EN, VU, NT), and they are not protected in any conservation units. In conclusion, the western Amazon, besides having high palm richness, also has palm endemic areas, especially, near the Andean sub-region and the Peruvian Amazon, and areas with low species richness, especially those areas with data deficiency, need to be further researched for a better knowledge of their diversity and richness patterns.
245

Desenvolvimento capitalista e realidade da produção agropecuária familiar na Amazônia Paraense / Capitalist development and the real facts of the family agricultural production in the State of Pará, Amazon

Herrera, José Antonio, 1979- 20 August 2018 (has links)
Orientador: Pedro Ramos / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Economia / Made available in DSpace on 2018-08-20T05:42:30Z (GMT). No. of bitstreams: 1 Herrera_JoseAntonio_D.pdf: 5522360 bytes, checksum: e010c047b5bf56ac42d6d6e702c77299 (MD5) Previous issue date: 2012 / Resumo: O atrelamento do Brasil aos países desenvolvidos fez com que suas atividades econômicas fossem mais influenciadas por demandas externas do que pelas necessidades internas. Tal fato contribuiu para participações regionais desiguais. Nesse contexto a Amazônia é integrada à economia nacional de modo que o capital se aproveita das assimetrias das trocas não leais e desiguais para se expandir no território. Esse fenômeno se fez alterando as relações sociais e os meios de produção, estabelecendo mecanismos de geração de lucros facilitados na utilização dos recursos naturais. A exploração dos recursos passam ser mais intensa, degradando o meio ambiente e agravando os problemas sociais. A imposição do capital nas relações estabelecidas apesar de transformar a produção agropecuária familiar, não a eliminou, e essa apresenta distintas formas de produção e diferentes relações sociais. Partindo dessa premissa, buscou-se estudar a integração da Amazônia à economia nacional como resultado da expansão do desenvolvimento capitalista brasileiro, compreendendo como ocorre a interferência do capital no espaço agrário amazônico, principalmente na unidade de diversidade que constitui a produção agropecuária familiar no Sudoeste Paraense. O estudo foi realizado em três municípios que apresentavam diferentes formas de ocupação: Pacajá, área de Colonização Antiga; Anapu, área de PDS - Projeto de Desenvolvimento Sustentável; e Senador José Porfírio, a área de Projeto de Assentamento Convencional do INCRA - Instituto Nacional de Colonização e Reforma Agrária. Com base na teoria marxista, fez-se o estudo da integração da região à economia nacional, da estruturação do espaço agrário amazônico e principalmente como ocorreu a interferência do capital na realidade vivenciada por cento e cinquenta (150) famílias durante o ciclo agropecuário 2007-2008. Como procedimentos metodológicos foram utilizados parâmetros qualitativos (interpretação da realidade) e quantitativos (análise estatística) para compreender as determinações da atividade produtiva e o desempenho econômico. O fulcro do estudo está em entender como o desenvolvimento capitalista se aproveita das adversidades para se apropriar dos meios de produção no espaço agrário amazônico, compreendendo as diferentes formas de produção que os produtores agropecuários familiares estabelecem para permanecerem em meio às interferências do capital / Abstract: The linkage to the developed economies of Brazil made their economic activities were more influenced by external demands than by internal needs, this fact has contributed to unequal regional participation. In this context the Amazon is integrated into the national economy so that capital takes advantage of the asymmetries of unequal and not loyal exchanges to expand in the territory. This phenomenon was made changing social relations and the means of production, establishing mechanisms for generating easily gains using the natural resources. The exploitation of resources increase, degrading the environment and worsening social problems. Despite the imposition of capital in established relationships have transformed the family farm production, not eliminated it, and this presents different forms of production and different social relations. From this premise, we sought to study the integration of the Amazon to the national economy as a result of the expansion of capitalist development in Brazil, realizing as it does the interference of the capital in an Amazonian agrarian landscape, especially in the unity of diversity that constitutes the family agricultural production in Southwest of the state of Pará. The study was conducted in three counties, with different forms of occupation: Pacajá, Old Colony area; Anapu area PSD - Project for Sustainable Development, and Senador José Porfírio, the area of Conventional Settlement Project NICAR - National Institute of colonization and Agrarian Reform. Based on Marxist theory, it was studded the integration of the region to the national economy, the structure of Amazonian agrarian space and, especially, as was the interference of the capital actually experienced by one hundred fifty (150) households during the 2007-2008 agricultural cycle. In the methodological procedures were used qualitative (interpretation of reality) and quantitative parameters (statistical analysis) to understand the determination of productive activity and economic performance. The focus of the study is to understand how capitalist development takes advantage of adversity to take ownership of the means of agricultural production in the Amazon area, including the different forms of production that provide family farmers to remain amid the interferences of the capital / Doutorado / Desenvolvimento Economico, Espaço e Meio Ambiente / Doutor em Desenvolvimento Economico
246

Política ambiental em rede : governança e difusão da política pública em Unidades de Conservação / Environmental network policy : governance and public policy diffusion in Conservation Units

Jacaúna, Tiago da Silva, 1985- 27 August 2018 (has links)
Orientador: Lúcia da Costa Ferreira / Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciências Humanas / Made available in DSpace on 2018-08-27T12:34:28Z (GMT). No. of bitstreams: 1 Jacauna_TiagodaSilva_D.pdf: 9962371 bytes, checksum: 3591fc5ef7e3188bfaadfe12891121b8 (MD5) Previous issue date: 2015 / Resumo: Esta investigação aborda a política de conservação ambiental de criação de Unidades de Conservação (UCs) na Amazônia, particularmente, no estado do Amazonas. A principal característica dos processos que dão origem às políticas ambientais desta natureza é a multiplicidade de atores e interesses articulados em redes. Estas redes influenciam tanto os processos de difusão das práticas políticas quanto à coordenação da política pública e governança ambiental nas UCs. Realizei pesquisa empírica no Parque Nacional (PARNA) do Jaú, Reserva Extrativista (RESEX) do Rio Unini e Reserva de Desenvolvimento Sustentável (RDS) do Rio Negro. Entrevistei moradores, gestores e ONGs para entender o processo de formação e difusão destes modelos de UCs e coletei dados sociométricos (relacionais) para descobrir a rede de política pública e governança ambiental. A pesquisa demonstrou que o PARNA Jaú foi fruto do processo de difusão vertical de cima para baixo ('top-down'), no qual o Estado impôs o modelo influenciado, principalmente, pelo ambientalismo internacional. A RDS do Rio Negro também surgiu através da difusão 'top-down', capitaneado pelo governo do estado do Amazonas que, sem mobilização social efetiva, conduziu sua criação. Este dado demonstra que o governo estadual inverteu o processo originário de difusão política, pois a primeira RDS brasileira (RDS Mamirauá) se incorporou à política do Amazonas pela influência de um conjunto de cientistas nas esferas administrativas do estado, configurando um processo de difusão vertical de baixo para cima ('bottom-up'). A RESEX do Rio Unini nasceu a partir da difusão horizontal da política, na qual as redes sociais construídas no interior da sociedade civil, conectaram moradores locais, agentes do Estado e ONGs. Criou-se, assim, uma rede de política pública e governança baseada na heterogeneidade, na colaboração (ora hierárquica, ora horizontal) e na influência como instrumento de poder, protagonizada pela ONG Fundação Vitória Amazônia (FVA). Historicamente, esta ONG vem se posicionando como promotora da inovação e mudança institucional na região e, ao lado de outras ONGs, alterando o contexto institucional e territorial no Baixo Rio Negro. A análise dos dados demonstra que considerar o Estado ou a sociedade civil como variáveis isoladas não é o melhor caminho para entender a política ambiental. A maneira mais efetiva seria examinar a relação que se estabelece entre os atores nas suas redes de articulações, ultrapassando fronteiras territoriais e institucionais. Nesse contexto, as redes de política pública e governança ambiental não obedecem a hierarquias formais e devem ser tratadas como autônomas. Assim, a compreensão dos processos decisórios e a direção das mudanças dependem da estrutura e da posição dos atores no interior das redes / Abstract: This research concerns the environmental conservation policies of Conservation Units (protected areas) created in the Amazon, particularly in the State of Amazonas. The main feature of the processes that give rise to this kind of environmental policy is the multiplicity of actors and interests articulated within networks. These networks influence both political practices and the diffusion process in the coordination of public policy, as well as environmental governance within Conservation Units. I conducted empirical research in the National Park of Jaú, the Extractive Reserve of the Rio Unini, and the Sustainable Development Reserve of the Rio Negro. In these areas I interviewed residents, managers, and NGOs in order to understand the process of creating and diffusing models of Conservation Units, and collecting sociometric data (relational) in order to untangle networks of public policy and environmental governance. This research shows that the National Park of Jaú was the result of top-down vertical diffusion processes in which the State imposed a model influenced mainly by international environmentalism. The Sustainable Development Reserve of the Rio Negro also emerged through the top- down vertical diffusion process, led by the Amazonas state government without effective social mobilization. This data shows that the state government reversed this process, and in this case the first Brazilian Sustainable Development Reserve (Mamirauá) was incorporated into the Amazonas policy by the influence of a group of scientists in the administrative levels of the state, setting up a bottom-up vertical diffusion process. The Extractive Reserve of the Rio Unini was born from this horizontal diffusion of politics, in which social networks built within civil society were responsible in connecting local residents, state officials and NGOs. Thus, it created a network of public policy and governance based fundamentally on the heterogeneity in collaboration (either hierarchical or horizontal) and influence as an instrument of power, led by the NGO Fundação Vitória Amazônica (FVA). Historically, this NGO has positioned itself as a promoter of innovation and institutional change in the region and, together with other NGOs, has altered the institutional and territorial context in the region of Baixo Rio Negro. Data analysis shows that considering the state or civil society as separate variables is not an effective means to understand environmental policy. A more effective way would be to examine the relationship established between the actors in their networks, and by overcoming territorial and institutional boundaries. In this context, public policy and environmental governance networks do not follow formal hierarchies and should be treated as autonomous. Thus, understanding the decision-making processes and the direction of the changes depend on the structure and the position of the actors within the network / Doutorado / Ciencias Sociais / Doutor em Ciências Sociais
247

Detecção sorológica de infecção por Toxoplasma gondii e Leptospira spp. em peixes-bois (Trichechus inunguis) de dois centros de preservação da Amazônia brasileira. / Antibodies anti-Toxoplasma gondii and anti-Leptospira spp. in manatees (Trichechus inunguis) from two centers of preservation of the Brazilian Amazon.

Patrick Mathews Delgado 26 January 2011 (has links)
O presente estudo teve como objetivo avaliar a ocorrência de anticorpos anti-Toxoplasma gondii e anti-Leptospira spp. em peixes-bois (Trichechus inunguis) da Amazônia Brasileira. Amostras sanguineas de 74 peixes-bois foram colhidas. Para a pesquisa de anticorpos anti-T. gondii, os soros foram diluídos a 1:25, 1:50 e 1:500 e a presença de anticorpos foi determinada pela técnica de aglutinação modificada (MAT). Para Leptospira spp. a presença de anticorpos foi determinada pela técnica de soroaglutinação microscópica (SAM), com ponto de corte na diluição de 1:100. Dos 74 peixes-bois 29 (39,2%) foram positivos para T. gondii apresentando título de 25. Para Leptospira spp. 23 (31,1%) foram reagentes para quatro sorovares com títulos variando de 100 a 1600. Os sorovares foram: Patoc, Castellonis, Icterohaemorrhagiae e Butembo. Houve coaglutinação entre os sorovares Patoc, Castellonis e Icterohaemorrhagiae (títulos 100 e 200) em um animal (n°51). Este foi o primeiro relato da ocorrência de T. gondii e Leptospira spp. em peixes-bois da Amazônia brasileira. / This study aimed to evaluate the occurrence of anti-T. gondii and Leptospira spp. in manatees (Trichechus inunguis) from two preservation centers located in the Brazilian Amazon. Blood samples from 74 manatees were taken. For detecting antibodies to T. gondii, sera were diluted 1:25, 1:50 and 1:500 and precense of antibodies was determined by the modified agglutination test (MAT). To Leptospira spp. sera were diluted 1:100 and tested against a collection of 24 antigenic serovars and presence of antibodies was determined by microscopic agglutination test (MAT). Of the 74 manatees 29 (39.2%) were positive to T. gondii with titre at 25. For Leptospira spp. 23 (31.1%) samples were kacted with four serotypes with titers ranging from 100 to 1600. The serovars reagents were Patoc, Castellonis, Icterohaemorrhagiae and Butembo. In one sample, coaglutination of serovars Patoc, Castellonis and Icterohaemorrhagiae (titres 100 and 200) was observed. This is the first report of the occurrence of T. gondii and Leptospira spp. in manatees in the Brazilian Amazon.
248

Preservice Teachers’ Perceptions of Artificial Intelligence Tutors for Learning

Incerti, Federica 01 June 2020 (has links)
No description available.
249

Enterprise transition to Software-defined networking in a Wide Area Network : Best practices for a smooth transition to SD-WAN / Företagsövergång till mjukvarudefinierat nätverk i ett Wide Area Network : Bästa praxis för en smidig övergång till SD-WAN

Yassin, Ahmed, Yalcin, Fatih January 2019 (has links)
Software defined wide area networks (SD-WAN) is a relatively new concept for enterprises to structure their networks throughout sites. This thesis was to find best practices for enterprises wanting to transition their current infrastructure to SD-WAN with multiple factors considered. To accomplish this, results gathered from literature reviews, lab testing and interviews with employees from two different enterprises was made.  What was accomplished from the literature review was an overview from Equity Office’s transition to SD-WAN which gave a positive result, as well as a cost of ownership tests with Talari SD-WAN units by NSS Labs. Lab testing with Talari SD-WAN units and a cloud site from Amazon Web Services resulted in improvements in performance and stability compared to a local traditional setup to the cloud site, especially on multiple simultaneous connections. Lastly, results from interviews provided deep insight on how the enterprises planned the transition, what results were expected as well as gained profits in forms of cost and effectivity.  A definitive best practice which every enterprise should follow could not be made. Instead, best practices were found by factoring in different criteria that are unique for different enterprises. For future work, narrowing down to one methodology with more resources, could help in obtaining more realistic and accurate results. / Mjukvarudefinierade wide area networks (SD-WAN) är ett relativt nytt koncept för företag att strukturera sina nätverk genom sina kontor. Projektets mål var att hitta bästa praxis för företag som vill övergå från sin nuvarande infrastruktur till SD-WAN med hänsyn till flera faktorer. För att uppnå detta samlades resultat in från litteraturstudier, tester med laboration och intervjuer med anställda från två olika företag.  Det som uppnåddes från litteraturstudien var en översikt över Equity Offices övergång till SD-WAN vilket gav ett positivt resultat, samt en överblick av tester på ägandekostnader med Talari SD-WAN enheter som utfördes av NSS Labs. Tester med Talari SD-WAN enheter och en molnuppsättning på Amazon Web Services resulterade i förbättringar i prestanda och stabilitet jämfört med en lokal traditionell uppsättning till molnet, särskilt vid parallella anslutningar. Slutligen gav resultaten från intervjuer en djup inblick i hur företagen planerade övergången, vilka resultat som förväntades samt vinster i form av kostnad och effektivitet.  En slutgiltig bästa praxis som varje företag bör följa kunde inte bestämmas. Istället hittades bästa praxis genom att ta hänsyn till olika kriterier som är unika för olika företag. För framtida arbeten kan man smala ner arbetet till en typ av metodik med mer resurser, för att hjälpa till med att få mer realistiska och korrekta resultat.
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Enterprise transition to Software-defined networking in a Wide Area Network : Best practices for a smooth transition to SD-WAN / Företagsövergång till mjukvarudefinierat nätverk i ett Wide Area Network : Bästa praxis för en smidig övergång till SD-WAN

Yassin, Ahmed, Yalcin, Fatih January 2019 (has links)
Software defined wide area networks (SD-WAN) is a relatively new concept for enterprises to structure their networks throughout sites. This thesis was to find best practices for enterprises wanting to transition their current infrastructure to SD-WAN with multiple factors considered. To accomplish this, results gathered from literature reviews, lab testing and interviews with employees from two different enterprises was made.  What was accomplished from the literature review was an overview from Equity Office’s transition to SD-WAN which gave a positive result, as well as a cost of ownership tests with Talari SD-WAN units by NSS Labs. Lab testing with Talari SD-WAN units and a cloud site from Amazon Web Services resulted in improvements in performance and stability compared to a local traditional setup to the cloud site, especially on multiple simultaneous connections. Lastly, results from interviews provided deep insight on how the enterprises planned the transition, what results were expected as well as gained profits in forms of cost and effectivity.  A definitive best practice which every enterprise should follow could not be made. Instead, best practices were found by factoring in different criteria that are unique for different enterprises. For future work, narrowing down to one methodology with more resources, could help in obtaining more realistic and accurate results. / Mjukvarudefinierade wide area networks (SD-WAN) är ett relativt nytt koncept för företag att strukturera sina nätverk genom sina kontor. Projektets mål var att hitta bästa praxis för företag som vill övergå från sin nuvarande infrastruktur till SD-WAN med hänsyn till flera faktorer. För att uppnå detta samlades resultat in från litteraturstudier, tester med laboration och intervjuer med anställda från två olika företag.  Det som uppnåddes från litteraturstudien var en översikt över Equity Offices övergång till SD-WAN vilket gav ett positivt resultat, samt en överblick av tester på ägandekostnader med Talari SD-WAN enheter som utfördes av NSS Labs. Tester med Talari SD-WAN enheter och en molnuppsättning på Amazon Web Services resulterade i förbättringar i prestanda och stabilitet jämfört med en lokal traditionell uppsättning till molnet, särskilt vid parallella anslutningar. Slutligen gav resultaten från intervjuer en djup inblick i hur företagen planerade övergången, vilka resultat som förväntades samt vinster i form av kostnad och effektivitet.  En slutgiltig bästa praxis som varje företag bör följa kunde inte bestämmas. Istället hittades bästa praxis genom att ta hänsyn till olika kriterier som är unika för olika företag. För framtida arbeten kan man smala ner arbetet till en typ av metodik med mer resurser, för att hjälpa till med att få mer realistiska och korrekta resultat.

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