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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.
641

Courbe de rotation de la galaxie à partir de la photométrie d'amas situés à la périphérie du disque

Cournoyer, Jean-Philippe January 2004 (has links)
No description available.
642

Étude polarimétrique à haute résolution temporelle de la matière circumstellaire et des paramètres physiques de trois systèmes WR+O éclipsants de courte période

Villar-Sbaffi, Alfredo January 2005 (has links)
No description available.
643

Uso de inversor de frequência em sistema de irrigação do tipo pivô central e seu efeito na lâmina e uniformidade de distribuição de água /

Lima, Adenilsom dos Santos , 1975- January 2009 (has links)
Orientador: João Luis Zocoler / Banca: Antônio de Pádua Sousa / Banca: João Carlos Cury Saad / Banca: Marcio Furlan Maggi / Banca: Maritane Prior / Resumo: Um sistema de irrigação deve possibilitar o manejo eficiente da lâmina de água aplicada. Para tal, é necessário avaliar o desempenho do sistema em operação. Este trabalho teve por objetivo avaliar a uniformidade de distribuição e lâmina de água aplicada por um equipamento de irrigação do tipo pivô central em função da variação da velocidade de rotação no conjunto motobomba com o uso de um inversor de freqüência e o efeito da posição da linha lateral nesses parâmetros. O trabalho foi realizado na Fazenda Nossa Senhora Aparecida, no município de Coronel Macedo - SP. Foram testadas duas condições de operação: Ensaio 1 com pressão constante na saída do conjunto motobomba e Ensaio 2 com rotação variável de acordo com a necessidade de altura manométrica. Para cada condição de operação foram testadas três posições de linhas coletoras de água: aclive de 3,45%, nível e declive de 11,78%. O delineamento experimental foi inteiramente casualizado, sendo feitas três repetições em cada posição testada. Aplicou-se a análise de variância seguida do teste de Tukey. O valores médios do coeficiente de uniformidade de Heermann & Hein foi 90,02% e 88,85% para os Ensaios 1 e 2, respectivamente, qualificando a uniformidade de acordo com a Norma da ABNT como muito boa e boa. Também, a posição da linha lateral influenciou 2 significativamente na rotação do conjunto motobomba e conseqüentemente no consumo de energia. A lâmina média ponderada de irrigação aplicada foi 5,84 mm e 5,71 mm para os Ensaios 1 e 2, respectivamente, variando dentro de cada ensaio significativamente (5%) entre as posições de declive versus aclive e nível. Concluiu-se que para os Ensaios 1 e 2 a rotação e a posição da linha lateral influenciaram significativamente na uniformidade de distribuição, lâmina de água aplicada e consumo de energia, exceto para o Ensaio... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: An irrigation system should enable the efficient management of the water depth applied. Therefore, it is necessary to evaluate the performance of the system in operation. This study aimed to evaluate the uniformity distribution and water depth applied in center pivot irrigation systems according to the change in speed of rotation of set motor pump with a frequency inverter and the effect of the position of the lateral line in these parameters. The study was conducted at the Nossa Senhora Aparecida Farm, in the city of Coronel Macedo - SP. Two operation conditions were tested: Test 1 with constant pressure in the output of set motor pump and Test 2 with variable rotation in accordance with the need of the pressure of system. For each condition of operation were tested three positions of lines of collecting: incline of 3.45%, level and the slope of 11.78%. The experimental design was completely randomized, and three repetitions at each position of lines collecting tested. It was applied to analysis of variance followed by Tukey test. The average value of the coefficient of uniformity of Heermann & Hein was 90.02% and 88.85% for Tests 1 and 2, respectively, discribing the uniformity according to the Standard ABNT as very good and good. Also, the position of the lateral line significantly influenced the rotation of set motor pump and consequently in energy consumption. The mean weighed depth of irrigation applied was 5.84 mm and 5.71 mm for Tests 1 and 2, respectively, varying in each test significantly (5%) between positions of the slope versus incline and level. It was concluded that for the Tests 1 and 2, the rotation and the position of and lateral line influenced significantly... (Complete abstract click electronic access below) / Doutor
644

Automated Key Rotations In a Continuous Deployment Pipeline

Rylander, Jim, Moberg, Jacob January 2018 (has links)
Background. To the best of our knowledge, there is no related work that brings up key management in Continuous Deployment. Most of the previous research within the area handles challenges and how to apply to continuous methods. Objectives. By performing this research our goal was to determine how to apply automated key rotation as a way of improving the security in a Continuous Deployment pipeline. We also wanted to compare a manual way of rotating the keys compared to an automated way. When comparing these different scenarios to a scenario where no key rotation was active we hoped to reach a conclusion of whether it is worth implementing automated key rotations in a CDE pipeline or not. Methods. By configuring different tools like GitLab, GitLab-Runner and Vagrant we created a working test pipeline. Since manual key rotation can be implemented in the CDE pipeline, the goal was to create a script that could automate the same process. In our tests we focused on the keys between GitLab and GitLab-Runner. Our tests consisted of comparing three different scenarios, a pipeline with: no, manual and automated key rotations. The three different scenarios where compared on 7 factors to help us reach a conclusion of whether automated key rotations was worth applying as a way to improve the security in a CDE pipeline. Results. With the help of tools like cURL and sshpass we managed to automate the key rotation. When we measured the different processes between no, manual and automated key rotations, the result showed us that the automated process has an average time of 1.6 seconds run time and 1.14 seconds average of server downtime. The run time is 70 times faster than the manual key rotation and has 5 times less average server downtime. Conclusions. We came to the conclusion that it is possible to use key rotation and keep the CDE process fully automated. It makes the process safer but also have the side effect of server downtime.
645

Uplatnění meziplodin jako stabilizujícího prvku v protierozní ochraně v oblasti podhůří Šumavy / The application of the intercrop as a stabilizing element in the erosion control in the area of the foothills of Sumava.

ŠLAPÁKOVÁ, Veronika January 2015 (has links)
The aim of this thesis is to evaluate the possibility of applying the intercrop in the erosion control crop rotation and their effect on the system of the sustainable agriculture and assess the suitability of utalizition of the intercrop as an element of the erosion control for the environmentally friendly farming on the arable ground. Erosion phenomena will be evaluated in the selected location and in the cadastral Borovany. The outcome will be the evaluation of the washes of the conventional crop rotation and of the process which uses the intercrop using the USLE method.
646

Incidência da diminuição de amplitude de movimento na articulação do quadril em jovens jogadores de futebol e a resposta a um programa de intervenção por alongamentos : um ensaio clínico randomizado

Castro, Jacqueline Vieira de January 2012 (has links)
Introdução: após um longo período voltado para a correção das insuficiências do LCA, a lesão de maior incidência no futebol, a comunidade ortopédica concluiu que o comportamento da biomecânica articular dos indivíduos difere muito e, portanto, começou a pesquisar fatores antropomórficos que pudessem contribuir com os eventos traumáticos do joelho, especialmente, aqueles originados por fatores intrínsecos. Entre estes, destaca-se a restrição articular rotacional do quadril, que pode ser oriunda de compensações musculoesqueléticas adquiridas com treinamento continuado do futebol desde a infância. Assim, a investigação de tais alterações deveria figurar como elemento fundamental na promoção de saúde de jovens atletas. Objetivo: o objetivo deste estudo foi verificar a restrição articular rotacional do quadril e a influência do alongamento no comportamento desta articulação, em jogadores de futebol de categorias de base do Sport Club Internacional de Porto Alegre, RS, Brasil. Materiais e Métodos: foram avaliados os graus de RI e RE do quadril de 262 jogadores do sexo masculino, com idades entre 9 e 19 anos. O grupo foi randomizado em dois subgrupos: controle e alongamento específico, e reavaliados após doze semanas. A Análise de Variância (ANOVA) one-way e two-way para medidas repetidas foi aplicada para analisar as diferenças intra e intergrupos, complementada por testes t-student, considerando p0,05 para significância estatística. Resultados: os resultados mostraram redução na ADM rotacional do quadril destes atletas, com o passar dos anos de prática frequente do futebol. Foi possível também verificar que houve melhora da ADM de rotação externa do quadril no grupo alongamento, no membro não dominante. Conclusão: constatou-se que a prática do futebol pode ser um fator desencadeante da restrição articular rotacional do quadril, e que a prática de alongamentos específicos pode amenizar a situação retrátil, nociva, do quadril nos jogadores de futebol. / Context: After years of focusing on the management of anterior cruciate ligament (ACL) injuries, the most common soccer-related injuries, the orthopedic community has concluded that soccer players have a wide range of variation in joint biomechanics and has thus started to focus research efforts on the morphological factors that might contribute to A CL trauma. One such factor is decreased hip rotation range of motion (ROM), which may be due to compensatory musculoskeletal changes occurring in response to longstanding soccer practice since childhood. Therefore, investigating these changes became a key element to the promotion of young athletes' health. Objective: This study sought to assess decreased hip rotation and the influence of stretching exercises on the behavior of the hip joint in players of the youth soccer sectors of a Brazilian soccer team. Design: Randomized clinical trial. Setting: University hospital. Patients: 262 male soccer players. Interventions: Subjects were randomly allocated into two groups – control or a stretching program. Main outcome measures: Subjects were reassessed after 12 weeks. Results: Our findings suggest that hip rotation ROM decreases over the years in soccer players. In our sample, adherence to a stretching program improved external hip rotation ROM in the non -dominant limb. Conclusion: We conclude that playing soccer can restrict rotation ROM of the hip, and that adherence to stretching can mitigate the harmful effects on the hip joint.
647

Lateralita v sociálním a lokomočním chování prasat domácích (Sus scrofa f. domestica) / Laterality in social and locomotory behaviour of domestic pigs (Sus scrofa f. domestica)

Kunclová, Kristýna January 2018 (has links)
The aim of this diploma thesis is to find out whether pigs exhibit laterality in social behavior, especially the laterality of rotational movements in game behavior and social interactions. We aimed also to explore how this laterality is influenced by other factors, especially the possibilities of playful behavior in ontogenesis, personality and others social and non-social factors. Alternatively, whether the degree of laterality determined varies depending on the social situation (game / aggression) and whether is influenced by the litter. I have investigated this behavior for 64 pigs in 16 litters from videotapes of their social behavior. For each pig, I recorded the playing element and the preferential side. For individual game elements I did not find any preference for rotation at the population level and only a slight tendency for individual laterality. For social game elements, I have shown a weak population tendency to prefer left side, but only for a group of more playing pigs. The main contribution of this work is the symmetry found in the implementation of individual game elements and, on the contrary, the observed laterality at the population level for social game behavior. Since the laterality of playful behavior has not yet been investigated, it is possible that this symmetry is...
648

Dynamical circulation regimes in planetary (and exo-planetary) atmospheres

Tabataba-Vakili, Fachreddin January 2017 (has links)
In this thesis, we study the effect of diurnally- and seasonally-varying forcing on the global circulation of planetary atmospheres explored within a large parameter space. This work focusses on studying the spacial and spectral energy budgets across a large range of planetary parameters as well as the momentum transfer as a response to diurnal and seasonal effects. We simulate planetary atmospheres using PUMA-GT, a simple GCM co-developed for this work, that is forced by a semi-grey two-band radiative-convective scheme, dissipated by Rayleigh friction and allows for temporally varying insolation. Our parameter regime includes the variation of the planetary rotation rate, frictional timescale in the boundary layer, the thermal inertia of the surface and the atmosphere, as well as the short-wave optical thickness. We calculate the energy transfer in Martian atmosphere to have a reference case of an atmosphere that is subject to very strong seasonal and diurnal variation. For this we present the first Lorenz energy budget calculated from reanalysis data of a non-Earth planet. A comparison between Martian and Earth atmosphere reveals a fundamentally different behaviour of the barotropic conversion term in the global mean. A significant impact of the thermal tide can be discerned in the generation of eddy kinetic energy, especially during global dust storms. Our study of seasonal variation reaffirms previous work that the equatorial super-rotating jet in the slow-rotating regime is arrested for strong seasonal variation. We find a novel explanation as to why the Titan atmosphere is able to maintain super-rotation despite strong surface seasonality; for non-zero short-wave absorption in the atmosphere the mechanism that hinders equatorial super-rotation is weakened. Diurnally-varying forcing can significantly enhance the equatorial super-rotation in cases with non-zero short-wave absorption. In our simulations this enhancement is maintained by a convergence of vertical momentum flux at the equator. Efforts to identify the atmospheric waves involved in this enhancement point towards thermally-excited gravity waves.
649

Stanovení poloměru otáčení u traktorů Zetor Forterra 140 HSX, Zetor Proxima 120 Power a Zetor 7745 Turbo pro potřeby počítačových modelů

ZLOCH, Jan January 2018 (has links)
The main aim of this diploma thesis is to determine the radius of rotation of selected tractors (Zetor Forterra 140 HSX, Zetor Proxima 120 Power and Zetor 7745 Turbo) on three different types of surfaces using different speeds. The literary part deals briefly with the importance and historical development of tractors, the basic knowledge of traction theory, the problems of forces acting on the rolling wheel, and last but not least the construction of the tractor parts. The practical part is mainly focused on determining the radii of rotation of individual tractors on three specified types of surfaces using the three given speeds. The discussion is mainly focused on comparing the radii of rotation meeting ČSN 30 0552 with the radii given by the tractor manufacturer.
650

Emissão de gases de efeito estufa e estoque de carbono no sistema solo-planta em função do sistema de produção e da aplicação superficial de corretivo da acidez / Greenhouse gas emissions and carbon stock in the soil-plant system influenced by the production system and the surface lime application

Alves, Michely da Silva [UNESP] 24 February 2016 (has links)
Submitted by MICHELY DA SILVA ALVES null (michely-alves@hotmail.com) on 2016-04-25T11:54:23Z No. of bitstreams: 1 Michely - Dissertação Final.pdf: 2742202 bytes, checksum: 0308d3f5eca9eabf8eb23b41ea64599c (MD5) / Approved for entry into archive by Felipe Augusto Arakaki (arakaki@reitoria.unesp.br) on 2016-04-27T16:47:45Z (GMT) No. of bitstreams: 1 alves_ms_me_bot.pdf: 2742202 bytes, checksum: 0308d3f5eca9eabf8eb23b41ea64599c (MD5) / Made available in DSpace on 2016-04-27T16:47:45Z (GMT). No. of bitstreams: 1 alves_ms_me_bot.pdf: 2742202 bytes, checksum: 0308d3f5eca9eabf8eb23b41ea64599c (MD5) Previous issue date: 2016-02-24 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / A rotação de culturas em sistema de semeadura direta podem aumentar o estoque de C no solo e reduzir as emissões de gases de efeito estufa, no entanto o emprego de corretivos de solo pode prejudicar esses benefícios. Dentro deste enfoque o trabalho teve como objetivo avaliar a emissão anual de gases de efeito estufa e o estoque de C no sistema solo-planta em função do uso de diferentes corretivos da acidez do solo e de rotações de culturas em sistema de semeadura direta de longa duração. A pesquisa foi realizada, na Fazenda Experimental Lageado, pertencente à Faculdade de Ciências Agronômicas – UNESP, localizada no município de Botucatu (SP), e foi conduzida nos anos agrícolas de 2014/2015. O delineamento estatístico experimental foi em blocos casualizados dispostos em esquema de parcelas subdivididas. As parcelas foram constituídas por quatro sistemas de produção (I. Sistema “Safra consorciada com Forrageira”; II. Sistema “Safra – safrinha”; III. Sistema “Safra – Adubo Verde/Planta de Cobertura”; IV. Sistema “Safra Pousio”) e as subparcelas por duas fontes de corretivos de acidez aplicados em outubro de 2012 e uma testemunha (I – Correção com calcário dolomítico; II – Correção com silicato de cálcio e magnésio; III – Sem correção). As amostragens de gases para a determinação dos fluxos do CO2, N2O e CH4 provenientes do solo foram realizadas após a safra de verão em 2014/2015 e após a de inverno em 2015, em um total de 17 coletas de gases. Foram analisadas as quantidades de palha produzida em cada cultivo e os aportes médios de C e N adicionados ao solo no cultivo de inverno e verão. Foram avaliados também os estoques de C e N do solo nas profundidades de 0-10, 10-20, 20-40 cm, e C e N da biomassa microbiana na profundidade de 0-10 cm. Os resultados foram submetidos à análise de variância (p<0.05) e as médias foram comparadas pelo teste t (p<0.05). As rotações de culturas em Sistema Semeadura Direta e o uso de corretivos não aumentaram os estoques de C orgânico total e de N total no solo, tão pouco da Biomassa Microbiana. Apesar de não contribuir para os estoques no solo, a rotação de culturas com sistemas envolvendo forrageira e adubo verde resultaram em menores emissões de CO2 especialmente na safra. Por outro lado, no cultivo de outono-inverno, o aporte de resíduos sobre o solo não reduziu as emissões, especialmente de N2O. A correção do solo não aumentou as emissões acumuladas de CO2, porém, na comparação entre os corretivos, a maior emissão de CO2 ocorreu com o uso de silicato. Os sistemas de produção com uso de forrageira e adubo verde no inverno, e o uso de corretivos da acidez, principalmente o silicato, aumentou a produtividade de grãos de milho por unidade de massa de carbono equivalente emitido para a atmosfera. / Crop rotation in no tillage can increase the stock of C in the soil and reduce emissions of greenhouse gases, though the use of soil amendments can undermine these benefits. Within this approach the work aimed to evaluate the annual emission of greenhouse gases and carbon storage in the soil-plant system due to the use of different corrective of soil acidity and crop rotations in long-tillage system duration. The survey was conducted in the Experimental Farm Lageado, belonging to the Faculty of Agricultural Sciences - UNESP, located in Botucatu (SP), and was conducted in the agricultural year 2014/2015. The plots consisted of four production systems (I. System "Safra intercropped with forage"; II System "Safra - offseason."; III System "Safra - Green manure / cover plant."; IV System "Safra Fallow." ) and the subplots by two sources of acidity corrective applied in October 2012 and a control (I - Correction with dolomitic lime II - Correction with calcium and magnesium silicate III - No correction). The gas samples for the determination of CO2 flows, N2O and CH4 from soil were performed after summer season 2014/2015 and further in the winter in 2015. The quantities of straw produced in each culture medium and supply of C and N added to the soil in winter and summer crops were analyzed. They also evaluated the stocks of C and N soil at 0-10, 10-20, 20-40 cm, and C and N microbial biomass at a depth of 0-10 cm. The results were submitted to analysis of variance (p <0.05) and the means were compared using the t test (p <0.05). Crop rotations System direct sowing and the use of lime did not increase the total organic carbon stocks and total N in the soil, as little of Microbial Biomass. Although not contributed to the stocks in the soil, crop rotation with systems involving forage and green manure resulted in lower CO2 emissions especially in the harvest. On the other hand, in the autumnwinter, the residue inputs on the ground did not reduce emissions, especially N2O. The soil remediation did not increase the accumulation of CO2, however, in the comparison between the correctives, the most CO2 emission occurred with the use of silicate. The production systems with use of fodder and green manure in winter, and the use of limestone, mainly silicate, increased productivity of corn grain per unit mass of carbon equivalent emitted into the atmosphere.

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