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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.
1

Populationsgenetische Untersuchungen zur Entwicklung der Hunderasse Elo sowie zum Auftreten und zur Vererbung von Distichiasis

Kaufhold, Judith. Unknown Date (has links) (PDF)
Tierärztl. Hochsch., Diss., 2004--Hannover.
2

Lift-Off of ZnSe-based Epilayer and Epitaxial growth of ZnSxSe1-x on it by LP-OMVPE

Tsay, Bor-Tzong 01 July 2000 (has links)
ABSTRACT ZnSe-based materials have excellent characteristics for blue light emitting devices. So the substrates used for the growth of ZnSe-based alloys are considered from three points of (1) lattice match, (2) thermal match, and (3) interdiffusion. By replacing GaAs or GaP wafers by ZnSe substrates can avoid disadvantages of heteroepitaxy caused by lattice constant mismatch, by differential thermal expansion coefficients between substrate and epilayer. But the ZnSe substrate is cost too much. And it is not easy to achieve. So we choose the other way to get the substrate by Epitaxial Lift-Off (ELO). Another reason for this study is that the light extraction efficiency of these devices is limited by the optically absorbing GaAs substrate. So it can be improved by replacing GaAs with a new metal/glass substrate. The metallic interlayer can be used not only as an adhesive, but also as the reflective mirror to reflect light in the wafer-bonded LED structure. In this study, ZnSe-epliayer have been successfully lifted-off from GaAs by etching solution (NaOH(1M): H2O2(30%) = 4:1 or NH4OH(30%): H2O2(30%) = 9:1) and adhered it onto Indium/glass. From PL spectra, the PL intensity and broad band increases after ELO. The broad band can be decreased by surface trimming of citric etching solution (C6H8O7: H2O: H2O2 = 30g: 30ml: 10ml). This etching process is helpful in regrown ZnSe-epilayer. Regrowth of ZnSSe with [H2Se]/[H2S]¡×4 and II/IV=12.5, shows a NBE emission at 432nm with a FWHM of 26.6 meV at 77K PL spectrum. And the DAP is disappear after regrown. It means that the quality of ZnSe-epilayer becomes better after regrown.
3

Pricing Virtual Goods: Using Intervention Analysis and Products’ Usage Data

Yang, Lin January 2014 (has links)
The rapid growth of online games enables firms to charge players for virtual goods they sell for use within their online game environments. Determining prices for such virtual goods is inherently challenging due to the absence of explicit supply curve as the marginal cost of producing additional virtual goods is negligible. Utilizing sales data, we study daily revenue of a firm operating a virtual world and selling cards. Explicitly, we analyze the impact of new product releases on revenue using ARIMA with intervention model. We show that during initial days after a new product release, the firm's daily revenue significantly increases. Using a quality measure, based on the Elo rating method, we can determine the relative good prices based on good usage. Applying this method we show that the rating of a product can be a good proxy for units sold. We conclude that our quality-based measure can be adopted for pricing other virtual goods.
4

Utilizing logistic regression to apply the ELO system in forecasting Premier League odds / Användning av logistisk regression för att tillämpa ELO-systemet vid prognostisering av Premier League-odds

Thegelström, Claudio January 2023 (has links)
This thesis provides insights into the creation of a model for predicting odds in the Premier League. It illustrates how the ELO system and historical odds, in combination with Monte Carlo simulations, can be implemented through logistic regression to predict odds in an unbiased way. The findings are that the model performs generally well, but significantly worse at the beginning and end of the Premier League seasons. For further improvements, it is most likely necessary to factor in variables not available in the current model. Such factors could for example be incentives, injuries, or changes in the squad, all not being accounted for by the model in this case. / Detta examensarbete ger insikter om skapandet av en modell för att förutsäga oddsen i Premier League. Den visar hur ELO-systemet och historiska odds, i kombination med Monte Carlo-simuleringar, kan implementeras genom logistisk regression för att förutsäga oddsen på ett opartiskt sätt. Resultaten visar att modellen generellt sett fungerar bra, men betydligt sämre i början och slutet av Premier League-säsongerna. För ytterligare förbättringar är det troligtvis nödvändigt att ta hänsyn till variabler som inte är tillgängliga i den nuvarande modellen. Sådana faktorer kan till exempel vara incitament, skador eller förändringar i truppen, som alla inte tas hänsyn till i modellen i detta fall.
5

Experimental Investigation of the Epitaxial Lateral Overgrowth of Gallium Nitride and Simulation of Gallium Nitride Metalorganic Chemical Vapor Deposition Process

Ju, Wentao 24 April 2003 (has links)
No description available.
6

[en] DEVELOPMENT OF A THREE DEGREE-OF-FREEDOM PNEUMATIC LINK FOR FLEXIBLE ROBOTIC MANIPULATORS / [pt] DESENVOLVIMENTO DE UM ELO PNEUMÁTICO DE 3 GRAUS DE LIBERDADE PARA MANIPULADORES ROBÓTICOS FLEXÍVEIS

FELIPE DOS SANTOS SCOFANO 30 October 2006 (has links)
[pt] Recentemente, grande interesse tem se voltado na robótica para o conceito de manipuladores flexíveis. Estes dispositivos apresentam uma coluna vertebral deformável continuamente, em oposição aos tradicionais manipuladores robóticos elo/junta/elo com elos rígidos. Sistemas flexíveis oferecem um aumento em potencial da capacidade de interação com o ambiente, estando aptos a se ajustarem às limitações do meio através de sua deformação. Robôs flexíveis oferecem possibilidades atrativas para o uso em diversas aplicações, como em posicionamento em ambientes complexos com obstáculos, endoscópios ativos, e manuseamento de materiais frágeis. O uso de polímeros, em particular elastômeros, tem sido explorado nestes manipuladores para promover simplicidade de operação e menor rigidez, necessária para uma interação homemmáquina com maior segurança. Usufruindo-se destes conceitos, esta dissertação aborda o desenvolvimento de um manipulador pneumático flexível de longo alcance. O manipulador é composto por uma estrutura modular, formada por vários elos ligados serialmente, permitindo que em sua extremidade sejam acopladas ferramentas que auxiliem a execução de diferentes tarefas. O sistema é baseado em um atuador pneumático denominado Músculo Artificial Pneumático (Pneumatic Artificial Muscles, PAM). Ao serem pressurizados, estes dispositivos se contraem, exercendo uma força em sua extremidade proporcional à pressão aplicada. A movimentação do manipulador desenvolvido é obtida a partir da diferença de pressão entre câmaras independentes localizadas em seu interior. Modelos analíticos dos sistemas desenvolvidos foram elaborados. O controle do manipulador é feito a partir de servoválvulas pneumáticas controladas por computador. Experimentos foram realizados para verificar os modelos desenvolvidos. O sistema desenvolvido pode ser aplicado à tarefa de inspeção interna de reservatórios de combustíveis. Inspeções internas atualmente requerem um completo esvaziamento do reservatório, se tornando muito trabalhosas e resultando em altos custos. Uma versão do manipulador é adaptada para executar esta tarefa sem a necessidade de esvaziar os tanques, devido à segurança intrínseca do sistema pneumático. / [en] Recently, the concept of flexible manipulators has attract great interest. These devices present a continuously deforming vertebral column, in opposition to the traditional robotic manipulators link/joint/link with rigid links. Flexible systems offer a potential increase in the capacity of interaction with the environment, being apt to adjust itself to the constrants through its deformation. Flexible robots offer attractive possibilities for usage in many applications, as complex environments positioning with active obstacles, endoscopies, and manipulating fragile materials. Polymers, specially elastomers, have been explored in these manipulators to guarantee simple operation and minor rigidity, necessary for a higher security man-machine interaction. Making a good use of these conceptions, this dissertation presents the development of a long-reach flexible pneumatic manipulator. The manipulator is composed of a modular structure, formed by links attached serially, allowing tools to be connected in its end-point for assistence in different tasks. The system is based on a pneumatic actuator called Pneumatic Artificial Muscle (PAM). When pressurized, these devices contract themselves, exerting a proportional force in its end-points proportional to the applied pressure. The manipulator´s motion is obtained from the pressure difference between the independent chambers located in its interior. Developed systems analytical models have been elaborated. Pneumatic valves, commanded by computer, control the manipulator. Experiments have been carried through to test the developed models. The developed system can be applied to internal inspection of fuel tanks. Internal inspections currently require a complete tank ullage, becoming very laborious and resulting in high costs. A manipulator´s version is adapted to execute this task in a full fueled tank, due to intrinsic security of the pneumatic system.
7

?Animita Cartonera?: el Museo, la colecci?n y cosmetizaci?n de desechos

Cereceda Trivi?o, Carolina Loreto January 2008 (has links)
Informe de Seminario para optar al grado de Licenciado en Lengua y Literatura Hisp?nica menci?n Literatura / A lo largo de todo este an?lisis se han tratado diversos aspectos del proyecto editorial ?Animita Cartonera?, que van desde los textos que ella publica, hasta la superficie de inscripci?n de los mismos, es decir la realizaci?n material de los libros ? objetos, a trav?s de su propuesta est?tica, visual y sus planteamientos ideol?gicos.
8

Modelagem do elo de corrente contínua para análise harmônica utilizando o método de injeção de correntes trifásico harmônico com solução iterativa

Niquini, Filipe Magno Mayrink 11 May 2009 (has links)
Submitted by isabela.moljf@hotmail.com (isabela.moljf@hotmail.com) on 2017-03-02T13:45:50Z No. of bitstreams: 1 filipemagnomayrinkniquini.pdf: 2365421 bytes, checksum: 954638a44d09253760fe05bbb286600f (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-03-06T19:40:13Z (GMT) No. of bitstreams: 1 filipemagnomayrinkniquini.pdf: 2365421 bytes, checksum: 954638a44d09253760fe05bbb286600f (MD5) / Made available in DSpace on 2017-03-06T19:40:13Z (GMT). No. of bitstreams: 1 filipemagnomayrinkniquini.pdf: 2365421 bytes, checksum: 954638a44d09253760fe05bbb286600f (MD5) Previous issue date: 2009-05-11 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Esta Dissertação apresenta o desenvolvimento de uma nova ferramenta matemática para a análise de sistemas de corrente contínua integrados a sistemas de potência CA. A metodologia é fundamentada no domínio da frequência e é baseada nas equações de injeção de correntes e no fluxo de potência harmônico, estruturados numa programação esparsa e num sistema totalmente unificado, possuindo grande agilidade e robustez na simulação dos sistemas. São construídos modelos completos e detalhados dos principais componentes do sistema, com representação completa e explícita dos sistemas CA e CC, bem como das características não-lineares dos conversores de potência, permitindo uma completa análise dos efeitos harmônicos no sistema, inclusive no que diz respeito aos acoplamentos harmônicos. A modelagem proposta visa suprir as limitações geralmente encontradas nas metodologias que se baseiam no domínio da frequência para a simulação de sistemas CC, desenvolvendo uma ferramenta eficiente para análise desses sistemas no domínio da frequência. O sistema permite a análise de elos CC de alta complexidade, como conversores de 12 pulsos e acoplamentos assíncronos. A validação do modelo desenvolvido é realizada através de simulações comparativas no domínio do tempo pelo ATP (Alternative Transients Program). / This dissertation presents the development of a new mathematic methodology to simulate and to analyze DC networks integrated to AC power systems. The proposed methodology is developed in frequency domain and it is based on three-phase harmonic current injection equations structured in a Newton-Raphson unified matrix system. This scheme allows the complete and explicit representation of integrated DC and AC systems, as well as the modeling of power converters non-linear characteristics. The agility and robustness in computational simulation using the proposed model are guaranteed by sparse and memory management techniques. The developed methodology presents an efficient harmonic simulation tool that overcomes the limitations of existing methods for integrated AC/DC systems simulation. The proposed model can simulate HVDC system of high complexity such as the ones based on 12-pulses converters and used to interconnect unbalanced and asynchronous AC networks. The validation is accomplished by comparative simulations between the developed methodology in frequency domain against the ATP (Alternative Transients Program) in time domain.
9

A participants' alignment of goals assessment (PAGE) of after school/expanded learning opportunities art education programming

Clark-Keys, Karen M. 08 March 2007 (has links)
No description available.
10

Esclavage et inventions spirituelles afro-brésiliennes : du Vudum Lebabimibome aux contes populaires / A escravidão e as invenções espirituais afro-brésiliennes : do Vudum Lebabimibome aos contos populares / Slavery and Afro-brazilian spiritual inventions : from the Vudu Lebabimibome to folk tales

Almeida Cerqueira, Hildebrando 27 November 2015 (has links)
Cette thèse a pour objectif de montrer un des impacts de l'esclavage sur l'histoire des peuples africains et leurs descendants. Comment ce fait a pu façonner la vie spirituelle des diasporas des Amériques, et en particulier du Brésil, et de quelle manière ces différentes populations ont su dialoguer entre elles, mais aussi s'approprier et transformer les valeurs culturelles des peuples qui les ont soumis. Tout en s'adaptant à ces nouveaux contextes, elles ont préservé leurs mémoires spirituelles en créant des intermédiaires cultuels comme l'entité du Seja Hundê, Candomblé jeje de Bahia, le vudum Lebabimibome, qui fusionne le singe et le Messager des religions ancestrales fon et yorouba Eshu-Legba. Par l'adoption de cette nouvelle manifestation religieuse, elles ont également su recycler l'image utilisée par les colonisateurs à l'encontre des Africains, associé à des singes et décrit comme un chaînon manquant entre l'homme et l'animal, ainsi des individus ont pu échapper à l'esclavage en refusant l'usage de parole. Aussi, par la ruse des singes des contes populaires, l'histoire sociale des esclaves et des libres subalternes vivant dans cette société est racontée ce qui constitue une archive de l'époque. / This dissertation aims to show how the enslavement of African peoples on the African continent and in the Americas has deeply influenced the spiritual and intellectual lives of Africans both on the continent and in the diaspora, particularly in Brazil. African peoples learned from the beginning how to dialogue with other Africans ethnicities and how to assess the cultural values being imposed by those people who dominated them. They could transform those values to their needs. Also they managed to safeguard their ancestral spiritual heritage, creating a vudu, known as Lebabimibome, merged with the Messenger of the Fon/Yoruba religion Eshu-Legba, and with a monkey. In this way they wittingly illustrated the European idea that Africans were the missing link between men and monkeys. Some Africans strategically accepted this image and used it to escape slavery by refusing to use spoken words in their relationship with Europeans and Native Americans. By using the monkey's guile, as described in these animal tales, the oral tradition could integrate the hermeneutical aspect of Eshu-Legba to translate the social history of the enslaved and subaltern peoples within these fables which function as archives in Brazilian society. / O objetivo desta tese é de demonstrar um dos impactos da escravidão na historia de povos africanos e afrodescendentes, de como este fato marcou a vida espiritual e intelectual das diasporas nas Américas, e da brasileira em especial Também, teatamos mostrar como estas populações souberam dialogar primeiramente entre elas e em seguida apropriar-se e transformar e transformar os valores culturais dos povos que os subjugaram Ao mesmo tempo que adaptavam aos novos contextos, estas populações souberam preservar suas memorias espirituais e conseguiram criar intermediarios sagrados como aquele do Seja Hundê, Candomblé Jeje da Bahia, o vudum Lebabimibome, hibrido do Messageiro das religiões ancestrais fon e ioruba Exu-Legba e de um macaco Pela adoção desta nova manifestação religiosa, esses povos souberam estrategicament reciclar ao mesmo tempo uma velha idéia construida pelos colonizadores sobre os africanos, que os associavam aos macacos, que eles eram o elo que ligava o homem ao animal, mas para poder escapar à escravidão certos grupos africanos utilizaram a mimica como meio de comunicação com os estrangeiros; por outro lado pelas artimanhas dos macacos dos contos populares, a vida social dos escravos e dos livres subalternos desta sociedade é também contada, transformando-os em arquivos de suas épocas

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