Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: Freehand; inertial tracking; Ultrasound. Includes bibliographical references (leaves 221-223).

Thesis (Ph. D.)--University of Washington, 2000. / Vita. Includes bibliographical references (leaves 100).

Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2009. / Includes bibliographical references (p. 73-78).

Chan, Man Leung Dunco. / Thesis submitted in: Nov 2008. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references (leaves 87-91). / Abstracts in English and Chinese. / Abstract --- p.2 / 摘要 --- p.3 / Acknowledgement --- p.4 / Content --- p.5 / List of figures --- p.6 / Chapter Chapter 1 --- Introduction --- p.9 / Chapter 1.1 --- Background --- p.9 / Chapter 1.2 --- Prior work --- p.11 / Chapter 1.3 --- Objectives --- p.13 / Chapter 1.4 --- Proposed method --- p.16 / Chapter 1.5 --- Thesis outline --- p.18 / Chapter Chapter 2 --- Axial curve-pair deformation --- p.19 / Chapter 2.1 --- Axial deformation technique --- p.20 / Chapter 2.1.1 --- Representing objects in axial space --- p.21 / Chapter 2.1.2 --- Defining the frame --- p.23 / Chapter 2.2 --- Axial curve-pair deformation technique --- p.24 / Chapter 2.2.1 --- Framing the curve-pair --- p.25 / Chapter 2.2.2 --- Construction of orientation curve --- p.26 / Chapter 2.2.3 --- Manipulation of the axial curve-pair --- p.28 / Chapter Chapter 3 --- Dynamic axial curve-pair based deformation --- p.32 / Chapter 3.1 --- The dynamic mass spring model --- p.34 / Chapter 3.1.1 --- Dynamic NURBS curve --- p.35 / Chapter 3.1.2 --- Dynamic Free-form deformation --- p.37 / Chapter 3.1.3 --- Dynamic Axial Curve-pair deformation --- p.38 / Chapter 3.2 --- The dynamic mass spring model --- p.41 / Chapter 3.2.1 --- Curve-pair Fitting --- p.41 / Chapter 3.2.2 --- Construction of dynamic curve-pair --- p.44 / Chapter 3.2.3 --- The three-degree torsional spring --- p.48 / Chapter 3.2.4 --- Conserving feature in a twisting deformation --- p.50 / Chapter 3.2.5 --- Comparison of mass spring model --- p.51 / Chapter 3.3 --- Internal and external forces --- p.54 / Chapter 3.3.1 --- Tensile stress --- p.54 / Chapter 3.3.2 --- Torsional stress --- p.55 / Chapter 3.3.3 --- External forces --- p.59 / Chapter 3.4 --- Equations of motion --- p.60 / Chapter 3.5 --- System solver --- p.63 / Chapter 3.6 --- Hierarchical representation --- p.67 / Chapter 3.7 --- Collision detection --- p.72 / Chapter Chapter 4 --- Implementation and experimental result --- p.75 / Chapter 4.1 --- Comparison with original mass-spring system --- p.76 / Chapter 4.2 --- Comparison with dynamic free form deformation --- p.77 / Chapter 4.3 --- Comparison with the axial curve-pair deformation --- p.78 / Chapter 4.4 --- Shape restoring power --- p.80 / Chapter 4.5 --- Applications --- p.81 / Chapter Chapter 5 --- Conclusion --- p.84 / Reference --- p.86

Although the quasi-adiabatic calculations have led to an improved description of the measured observables, the theoretical justifications of the assumptions made in the model have not yet been studied. The first part of the work described in this thesis is therefore concerned with the clarification of these theoretical uncertainties by performing a rigorous investigation of the accuracy and the validity of the model. In addition, we reformulate the quasi-adiabatic theory to give a more general formalism, approaching the three-body problem in a different way. This alternative formulation provides a clear understanding of the assumptions made in the original quasi-adiabatic theory. Using the spirit of the new quasi-adiabatic formalism, we also develop alternative approximation schemes for the treatment of quantum mechanical three-body systems. The accuracy and the range of validity of the developments, together with the quasi-adiabatic theory, are investigated carefully and precisely by comparing their predictions with those essentially exact CDCC technique for the 66Zn (d,p)67Zn reaction at 88.2 MeV. It is found that the alternative models and quasi-adiabatic theory are reliable techniques for the treatment of deuteron breakup process at intermediate energies of interest. The remainder of this thesis is devoted to the investigation of the mechanism of (p,d*) reactions. As the treatment of the final state interactions in such reactions has not previously been studied consistently, we develop an adiabatic method and apply it to new data for the 13C(p,d)12C reaction with 35 MeV incident proton energy. Due to the weak coupling between spin channels of the continuum n-p system at the energies of interest, the singlet and triplet state pickup cross-sections for the final n-p system are analyzed separately. We find that the contribution from the singlet state is dominant for small relative energies while the triplet state dominates for large energies. This application clarifies the relationship between the three-body dynamics in the final state of (p,d) and (p,d*) reactions.

No description available.

Orientador: José Carlos Plácido da Silva / Banca: Paulo Kawauchi / Banca: Luis Carlos Paschoarelli / Resumo: Dados antropométricos são os principais parâmetros projetuais para o dimensionamento de produtos e espaços de atividades. Eles permitem predizer alguns aspectos importantes das áreas de interface ainda durante o desenvolvimento projetual, principalmente no que se refere à adequação dimensional para populações específicas. Entretanto, apesar de expressivos, na forma em que são disponibilizados atualmente, estes dados acabam encontrando dificuldades para se difundir, principalmente dentro do setor produtivo onde a velocidade de produção e as exigências do empregador, muitas vezes fazem com que informações essenciais acabem sendo desconsideradas. Outra questão que se levanta refere-se à possível adequação e melhoria no processo de uso desse corpo de conhecimento para o dimensionamento dos projetos atuais, que em sua maioria, caminham para o desenvolvimento tridimensional em ambientes virtuais. Esta pesquisa tem por objetivo propor uma nova abordagem para autilização dos dados antropométricos de populações extremas, através do desenvolvimento de uma interface gráfica de consulta e manipulação, que divulgue e facilite o acesso às medidas, tabulações e parâmetros atualmente disponíveis, fornecendo também, referências e estudos tridimensionais com manequins antropométricos, dimensionalmente confiáveis, da população infantil e de idosos brasileiros, adequando-os desta forma ao contexto tecnológico atual de desenvolvimento de projeto / Abstract: Data anthropometrics are the principal parameters projects for the dimension of products and spaces of activities. They allow stilling predicting some important aspects of the interface areas during the development projects, mainly in what he/she refers to the dimensional adaptation for specific populations. However, in spite of expressive, in the form in that they are now available, these data end up having difficulties to diffuse, mainly inside of the productive section where the production speed and the demands of the employer, a lot of time do with that essential information end up being inconsiderate. Another subject that one lift refers to the possible adaptation and improvement in the process of use of that knowledge body for the dimension of the current projects, that in your majority, they walk for the three-dimensional development in virtual atmospheres. This research has for objetive to propose a new approach for use of the data anthropometrics of extreme populations, through the development of a graphic interface of consultation and manipulation, that it publishes and facilitate the acess now to the measure, tabulations and parameters available, also supplying, references and three-dimensional studies with dolls anthropometrics, reliable dimension, of the infantile population and of Brazilian senior, adapting them this way to the current technological context of project development / Mestre

This dissertation investigates the feasibility of creating real-time three-dimensional images, using data obtained from satellites. The aim is to enhance satellite imaging applications, by utilizing the normal 3-D visual perceptions of humans. A study is made of the different methods developed to create the illusion of seeing a three-dimensional object from essentially two-dimensional images. 3-D display devices based on the principles of human stereoscopic vision do exist. Other 3-D display techniques include holograms and volumetric displays. Satellite images are used in a wide range of applications, from urban planning, to earth surveillance, and even weather prediction. In the past, satellite imaging was the express domain of experts, trained in the analysis and interpretation of satellite images. However, in recent years, the acquisition and analysis of satellite images have been greatly facilitated by the growing number of commercial satellites in our skies, as well as readily available software packages. Satellite images are available in many types of image formats, and can represent a large variety of information about an area. The model developed for this dissertation (the ACSI-3D model) proposes a method for the conversion of satellite images to suitable input for a stereoscopic 3-D display device. The model covers the process from initial image acquisition to the final display. It consists of four basic phases: Image Acquisition, Stereopsis, Sequencing and Synchronization, and Display. The “Stereoscopic Image Pair Creator” prototype was developed to test parts of this model. / Ehlers, E.M., Prof.

M.Sc. (Computer Science) / Modelling the geometry of a 3D plant for use in a virtual environment can be highly laborious, and hence modelling a large collection of variations of the same plant can be a difficult task. Procedural rule-based methods, such as L-Systems, that generate plant geometry indirectly are powerful techniques for the modelling of plants. However such methods often require expert knowledge and skill in order to be used effectively. This dissertation explores a method for the modelling of procedurally generated plants using an evolutionary algorithm. The model is based on gene expression programming, and uses a hybrid of automated and interactive fitness evaluation. In the model, organisms are represented with linear genomes that can be expressed as L-Systems. The L-Systems can in turn be interpreted as geometry for 3D plants. Several automated fitness functions are presented to rate plants based on various topological and geometric attributes. These fitness functions are used in conjunction with user-based, interactive fitness evaluation in order to provide a comparison of different organisms. The model discussed in this dissertation offers advantages over previous approaches to modelling plants with evolutionary algorithms, and allows a user to quickly generate a population of varied plants without requiring knowledge of the underlying L-Systems.

The three-parameter lognormal distribution is widely used in many areas of science. Some modifications have been proposed to improve the maximum likelihood estimator. In some cases, however, the modified maximum likelihood estimates do not exist or the procedure encounters multiple estimates. The purpose of this research is focused on estimating the threshold or location parameter , because when is known, then the other two estimated parameters are obtained from the first two MLE equations. In this research, a method for constructing confidence intervals, confidence limits, and point estimator for the threshold parameter is proposed. Monte-Carlo simulation, bisection method, and SAS/IML were used to accomplish this objective. The bias of the point estimator and mean square error (MSE) criteria were used throughout extensive simulation to evaluate the performance of the proposed method. The result shows that the proposed method can provide quite accurate estimates.