• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 15
  • 6
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 37
  • 37
  • 29
  • 10
  • 8
  • 6
  • 5
  • 4
  • 4
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • 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.
31

Raiškiųjų interneto programų technologijos ir jų panaudojimas kuriant interaktyvias paskirstytas sistemas / Rich internet application technology and its usage in interactive distributed systems

Malinauskas, Kęstutis 31 August 2009 (has links)
Raiškiųjų interneto programų technologijos įgyja vis didesnę reikšmę interneto ir verslo sistemų kūrime. Jos leidžia sukurti sklandžią vartotojo sąsają, kuri išnaudoja naujas grafikos, skaičiavimų bei komunikacijos galimybes. Technologija yra aktyviai vystoma ir gauna vis daugiau dėmesio iš programinės įrangos kūrėjų. Šiame darbe pristatomos raiškiųjų interneto programų technologijos ir jų panaudojimas. Pristatomi nauji duomenų, verslo ir vaizdavimo logikos modeliavimo būdai. Aprašomos šių technologijų charakteristikos. Raiškiųjų interneto programų savybės palyginamos su darbastalio ir tradicinėmis interneto programų savybėmis. Sukurta pavyzdinė interaktyvi paskirstyta sistema ir parodomi galimi technologijos pritaikymo ir problemų sprendimo būdai. Galiausiai atliekami našumo ir apkrovimo testai, kurie parodo šių technologijų pritaikymo tikslingumą. / Internet technologies are being developed ever faster, and new ways for representing information are emerging. One such technology is Rich Internet Applications (RIA). This technology allows better and more responsive UI‘s, overwhelming graphic support, new computational, communication and interoperability capabilities. This technology is getting more and more support from key technology developers. In this work you will be presented with RIA technologies and their usage. New ways for working with data, business and presentation layers will be presented. RIA technology characteristics will be thoroughly analyzed and compared with desktop and traditional web applications. An example interactive distributed system will be presented to show possible technology choices and solutions. Finally performance and stress tests will be conducted to show RIA technology feasibility.
32

The effect of materials preparation on polymer surfaces

Vase, Ajoy January 2007 (has links)
This work examines the chemical and physical effects of a material treatment process on the biopolymers PEEK, POM-h, POM-c, PTFE and UHMWPE. The polymers are analyzed physically and chemically using atomic force microscopy, profilometry, scanning electron microscopy, optical microscopy, contact angle measurement, FT infra-red spectroscopy and energy dispersive X-ray spectrometry. PEEK is found to be the most suitable polymer and FT Infra-red spectroscopy an informative analytic tool.
33

Determinação de variáveis relevantes para proposição e avaliação de políticas públicas de gestão de resíduos sólidos urbanos: um estudo aplicado ao município de Curitiba

Fugii, Gabriel Massao 04 April 2014 (has links)
CAPES / O aumento na geração dos resíduos sólidos é um problema para a sociedade: encontrar formas para o seu equacionamento e disposição ambientalmente segura é um dos maiores desafios atuais em política pública. A gestão inadequada de resíduos gera uma série de problemas ambientais, sociais e econômicos. Assim, esta dissertação busca determinar as variáveis mais relevantes para proposição e avaliação de políticas públicas para a gestão de resíduos sólidos urbanos, aplicados ao município de Curitiba, no sentido de aprimorá-la, apontando adequações ou aperfeiçoamentos em seu atual modelo. O trabalho avalia modelos teóricos de gestão de resíduos, apresentando a proposição teórica de um modelo com base nos estudados. Este modelo serve como encaminhamento para a definição das variáveis mais relevantes, contando com a participação de especialistas, além de um método de análise multivariada. Tal método permite definir um modelo ajustado à percepção do painel de especialista. A pesquisa é exploratória e descritiva: utilizou-se, em um primeiro momento, levantamento bibliográfico e documental; em um segundo, fez-se o arrolamento das principais variáveis com especialistas. O procedimento utilizou a técnica Delphi de levantamento com especialistas da área, que colaboraram com a avaliação e complementação das variáveis presentes na gestão de resíduos. Com base na análise estrutural, o software possibilitou descrever um sistema que relaciona todas as variáveis que constituem o sistema, permitindo evidenciá-las de acordo com o impacto e influencia na evolução do sistema. Com base nisso, definiu-se um modelo de análise da avaliação e proposição da gestão de resíduos, que serve para uma avaliação das políticas de gestão de resíduos realizadas em Curitiba. Com relação aos resultados, Curitiba atende à maioria das variáveis consideradas mais relevantes. Entre elas estão: Custo; Planejamento; Fiscalização e informação; Aterro sanitário; Interação e participação; Geração per capita; Prevenção e controle; Coleta e Reciclagem, que são preponderantes em qualquer modelo e necessitam de desenvolvimento, avaliação e manutenção. / The increase in the generation of solid waste is a problem for society and there is a need to find ways for its equation. Environmentally safe disposal is one of the biggest challenges today. The management of municipal solid waste is essential to treat the waste, because inadequate management contributes to environmental, social and economic problems. This dissertation sought to determine the most relevant variables for proposing and evaluating public policies for the management of municipal solid waste, applied to the city of Curitiba. Their determination helps to improve solid waste management in the municipality, collaborating with adjustments or improvements to your current model. The study evaluated theoretical models of waste management and presented a theoretical proposition of a model from these studied. This model served as guide for definition of relevant variables and had the help of experts and a method of multivariate analysis to define the variables. The method allowed us to define a model adjusted the perception of expert panel. The research is exploratory and descriptive, as to their goal using bibliographic and documentary method and in a second time a survey of the main variables is used to experts. The procedure used the Delphi survey technique with specialists, who collaborated with the evaluation and complementation of variables present in waste management. After evaluation, a matrix was constructed, based on the answers given and then the matrix was analyzed by MICMAC © software, tool for structuring ideas. Based on the structural analysis, the software allowed describing a system where relationships with all the variables that make up the system are performed, allowing display the main variables that impact and can influence the evolution of the system. From this, an analysis model of the assessment and proposal for waste management, which served for a review of policies for waste management, was held in Curitiba defined. Regarding the results, Curitiba meets most of the variables considered most relevant. Among them are: Cost, Planning, Monitoring and information; Landfill; Interaction and participation, per capita generation; Prevention and Control; Collection and; Recycling, which are crucial to any model and require the development, evaluation and maintenance.
34

Determinação de variáveis relevantes para proposição e avaliação de políticas públicas de gestão de resíduos sólidos urbanos: um estudo aplicado ao município de Curitiba

Fugii, Gabriel Massao 04 April 2014 (has links)
CAPES / O aumento na geração dos resíduos sólidos é um problema para a sociedade: encontrar formas para o seu equacionamento e disposição ambientalmente segura é um dos maiores desafios atuais em política pública. A gestão inadequada de resíduos gera uma série de problemas ambientais, sociais e econômicos. Assim, esta dissertação busca determinar as variáveis mais relevantes para proposição e avaliação de políticas públicas para a gestão de resíduos sólidos urbanos, aplicados ao município de Curitiba, no sentido de aprimorá-la, apontando adequações ou aperfeiçoamentos em seu atual modelo. O trabalho avalia modelos teóricos de gestão de resíduos, apresentando a proposição teórica de um modelo com base nos estudados. Este modelo serve como encaminhamento para a definição das variáveis mais relevantes, contando com a participação de especialistas, além de um método de análise multivariada. Tal método permite definir um modelo ajustado à percepção do painel de especialista. A pesquisa é exploratória e descritiva: utilizou-se, em um primeiro momento, levantamento bibliográfico e documental; em um segundo, fez-se o arrolamento das principais variáveis com especialistas. O procedimento utilizou a técnica Delphi de levantamento com especialistas da área, que colaboraram com a avaliação e complementação das variáveis presentes na gestão de resíduos. Com base na análise estrutural, o software possibilitou descrever um sistema que relaciona todas as variáveis que constituem o sistema, permitindo evidenciá-las de acordo com o impacto e influencia na evolução do sistema. Com base nisso, definiu-se um modelo de análise da avaliação e proposição da gestão de resíduos, que serve para uma avaliação das políticas de gestão de resíduos realizadas em Curitiba. Com relação aos resultados, Curitiba atende à maioria das variáveis consideradas mais relevantes. Entre elas estão: Custo; Planejamento; Fiscalização e informação; Aterro sanitário; Interação e participação; Geração per capita; Prevenção e controle; Coleta e Reciclagem, que são preponderantes em qualquer modelo e necessitam de desenvolvimento, avaliação e manutenção. / The increase in the generation of solid waste is a problem for society and there is a need to find ways for its equation. Environmentally safe disposal is one of the biggest challenges today. The management of municipal solid waste is essential to treat the waste, because inadequate management contributes to environmental, social and economic problems. This dissertation sought to determine the most relevant variables for proposing and evaluating public policies for the management of municipal solid waste, applied to the city of Curitiba. Their determination helps to improve solid waste management in the municipality, collaborating with adjustments or improvements to your current model. The study evaluated theoretical models of waste management and presented a theoretical proposition of a model from these studied. This model served as guide for definition of relevant variables and had the help of experts and a method of multivariate analysis to define the variables. The method allowed us to define a model adjusted the perception of expert panel. The research is exploratory and descriptive, as to their goal using bibliographic and documentary method and in a second time a survey of the main variables is used to experts. The procedure used the Delphi survey technique with specialists, who collaborated with the evaluation and complementation of variables present in waste management. After evaluation, a matrix was constructed, based on the answers given and then the matrix was analyzed by MICMAC © software, tool for structuring ideas. Based on the structural analysis, the software allowed describing a system where relationships with all the variables that make up the system are performed, allowing display the main variables that impact and can influence the evolution of the system. From this, an analysis model of the assessment and proposal for waste management, which served for a review of policies for waste management, was held in Curitiba defined. Regarding the results, Curitiba meets most of the variables considered most relevant. Among them are: Cost, Planning, Monitoring and information; Landfill; Interaction and participation, per capita generation; Prevention and Control; Collection and; Recycling, which are crucial to any model and require the development, evaluation and maintenance.
35

High throughput characterization of cell response to polymer blend phase separation

Zapata, Pedro José 12 July 2004 (has links)
Combinatorial techniques, which overcome limitations of actual models of material research permitting to effectively address this large amount of variables, are utilized in this work to prepare combinatorial libraries of the blend of the biodegradable polymers Poly(e-caprolactone) and Poly(lactic acid). These libraries present continuous composition and temperature gradients in an orthogonal fashion that permit to obtain multiple surface morphologies with controllable microstructures due to the blends low critical solution phase behavior (LCST). The goal of this study is to investigate the effect of surface morphology (surface chemical patterning and surface topography) on cell behavior. The varied surface topography of the libraries is used as a valuable tool that permits to assay the interaction between MC3T3-E1 cells and hundreds of different values of critical surface properties, namely, surface roughness and microstructure size. The outcome of this tool is a rapid screening of the effect of surface topography on cell behavior that is orders of magnitude faster than the standard 1-sample for 1 measurement techniques. The results obtained show that cells are very sensitive to surface topography, and that the final effect of surface properties on cell function is intimately related with the stage of the cell developmental process. Meaning that, for example, areas with optimal characteristics to elicit enhancement of cell attachment is not necessarily the same that promotes cell proliferation. This study imparts an improved understanding of an often neglected factor in biomaterials performance: surface morphology (particularly surface topography). The results provide a new insight into the importance of taking into consideration both chemistry and physical surface features for superior biomaterial design.
36

Machine Learning Driven Simulation in the Automotive Industry

Ram Seshadri, Aravind January 2022 (has links)
The current thesis investigates data-driven simulation decision-making with field-quality consumer data. This is accomplished by outlining the benefits and uses of combining machine learning and simulation in the literature and by locating barriers to the use of machine learning (ML) in the simulation subsystems at a case study organization. Additionally, an implementation is carried out to demonstrate how Scania departments can use this technology to analyze their current data and produce results that support the exploration of the simulation space and the identification of potential design issues so that preventative measures can be taken during concept development. The thesis' findings provide an overview of the literature on the relationship between machine learning and simulation technologies, as well as limitations of using machine learning in simulation systems at large scale manufacturing organizations. Support vector machines, logistic regression, and Random Forest classifiers are used to demonstrate one possible use of machine learning in simulation.
37

Nanolithography on thin films using heated atomic force microscope cantilevers

Saxena, Shubham 01 November 2006 (has links)
Nanotechnology is expected to play a major role in many technology areas including electronics, materials, and defense. One of the most popular tools for nanoscale surface analysis is the atomic force microscope (AFM). AFM can be used for surface manipulation along with surface imaging. The primary motivation for this research is to demonstrate AFM-based lithography on thin films using cantilevers with integrated heaters. These thermal cantilevers can control the temperature at the end of the tip, and hence they can be used for local in-situ thermal analysis. This research directly addresses applications like nanoscale electrical circuit fabrication/repair and thermal analysis of thin-films. In this study, an investigation was performed on two thin-film materials. One of them is co-polycarbonate, a variant of a polymer named polycarbonate, and the other is an energetic material called pentaerythritol tetranitrate (PETN). Experimental methods involved in the lithography process are discussed, and the results of lithographic experiments performed on co-polycarbonate and PETN are reported. Effects of dominant parameters during lithography experiments like time, temperature, and force are investigated. Results of simulation of the interface temperature between thermal cantilever tip and thin film surface, at the beginning of the lithography process, are also reported.

Page generated in 0.1113 seconds