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Dissertations / Theses on the topic 'Shape'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

SOUZA, MARCIO ALBUQUERQUE DE. "ARBITRARILY SHAPED OBJECT CODING USING SHAPE-ADAPTATIVE DWT AND SHAPE-ADAPTATIVE SPIHT." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2001. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=1748@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>Codificação de objetos de forma arbitrária extraídos de imagens regulares é um dos assuntos de maior desafio nos mais recentes padrões de codificação de vídeo (MPEG-4). Neste estudo, é proposta uma nova estratégia de codificação de objetos envolvendo maior eficiência na decomposição e quantização de sub-bandas. A técnica de transformação proposta envolve Transformada Wavelet Discreta (DWT) e a de quantização é baseada no algoritmo de Partição de Conjuntos em Árvores Hierárquicas (SPIHT).<br>Coding of arbitrarily shaped obj

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2

Kelly, Brian L. "Beam shape control using shape memory alloys." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA358806.

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Thesis (M.S. in Astronautical Engineering) Naval Postgraduate School, December 1998.<br>"December 1998." Thesis advisor(s): Brij N. Agrawal, Gangbing Song. Includes bibliographical references (p. 55). Also available online.

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3

Su, Z. "Statistical shape modelling : automatic shape model building." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1213097/.

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Statistical Shape Models (SSM) have wide applications in image segmentation, surface registration and morphometry. This thesis deals with an important issue in SSM, which is establishing correspondence between a set of shape surfaces on either 2D or 3D. Current methods involve either manual annotation of the data (current ‘gold standard’); or establishing correspondences by using segmentation or registration algorithms; or using an information technique, Minimum Description Length (MDL), as an objective function that measures the utility of a model (the state-of-the-art). This thesis presents

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4

Yalim, Keles Hacer. "Part Embedding For Shape Grammars." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612231/index.pdf.

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Computational modeling of part relations of shapes is a challenging problem that has been addressed by many researchers since sixties. The most important source of the difficulty is the continuous nature of shapes, which makes the expression of shape very difficult in terms of discrete parts. When discrete parts are combined, they fuse and yield new parts, i.e. parts emerge. There is a number of methods that support emergent part detection. However all of these methods are based on strong assumptions in terms of what constitute a part. There is a need for a generic solution that treats a shape

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5

Jowers, Iestyn. "Computation with curved shapes : towards freeform shape generation in design." Thesis, Open University, 2007. http://oro.open.ac.uk/43671/.

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Shape computations are a formal representation that specify particular aspects of the design process with reference to form. They are defined according to shape grammars, where manipulations of pictorial representations of designs are formalised by shapes and rules applied to those shapes. They have frequently been applied in architecture in order to formalise the stylistic properties of a given corpus of designs, and also to generate new designs within those styles. However, applications in more general design fields have been limited. This is largely due to the initial definitions of the sha

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6

黃美香 and Mee-heung Cecilia Wong. "Shape analysis." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31211999.

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7

Aktas, Mehmet Ali. "Shape descriptors." Thesis, University of Exeter, 2012. http://hdl.handle.net/10871/9663.

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Every day we recognize a numerous objects and human brain can recognize objects under many conditions. The way in which humans are able to identify an object is remarkably fast even in different size, colours or other factors. Computers or robots need computational tools to identify objects. Shape descriptors are one of the tools commonly used in image processing applications. Shape descriptors are regarded as mathematical functions employed for investigating image shape information. Various shape descriptors have been studied in the literature. The aim of this thesis is to develop new shape d

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8

Baumgardner, Thomas A. "Shape Matters." ScholarWorks@UNO, 2014. http://scholarworks.uno.edu/td/1903.

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An analysis of the production of the University of New Orleans thesis film, Shape Matters, a period film, written and directed by Thomas Baumgardner. The film is concerned with the practice of Phrenology and follows a nervous preacher who becomes entangled in the bizarre "science" and a local murder. This paper describes the director's experiences and details the challenges encountered, and lessons learned, from attempting to bring the project to fruition.

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9

Wong, Mee-heung Cecilia. "Shape analysis /." [Hong Kong : University of Hong Kong], 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13637642.

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10

Larsen, Shane H. "Recognizing Parametric Geometry from Topology Optimization Results." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2072.

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Topology Optimization has been proven to be a useful tool in discovering non-intuitive optimal designs subject to certain design constraints. The results of Topology Optimization are either represented as a tessellation object composed of thousands of triangular surfaces, or as a point cloud. In either case, the results of Topology Optimization are not suited for use in subsequent steps of the design process which require 3D parametric CAD (Computer Aided Design) models. Converting Topology Optimization results into parametric CAD geometry by hand is an extremely tedious and time consuming pro

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11

Lin, Cong. "Digital shape classification using local and global shape descriptors." Thesis, University of Macau, 2011. http://umaclib3.umac.mo/record=b2492875.

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12

Erdem, Ibrahim Aykut. "Category Knowledge, Skeleton-based Shape Matching And Shape Classification." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12610118/index.pdf.

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Skeletal shape representations, in spite of their structural instabilities, have proven themselves as effective representation schemes for recognition and classification of visual shapes. They capture part structure in a compact and natural way and provide insensitivity to visual transformations such as occlusion and articulation of parts. In this thesis, we explore the potential use of disconnected skeleton representation for shape recognition and shape classification. Specifically, we first investigate the importance of contextual information in recognition where we extend the previously p

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13

Alkan, Sencer. "Fuzzy evolutionary shape and shape recognition for log modelling." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23858.pdf.

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14

Tykac, Michal. "Protein shape description and its application to shape comparison." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/284410.

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There are currently over 138, 000 known macromolecular structures deposited in the wwPDB (Worldwide Protein Data Bank) database. While all the macromolecular structure files contain information about a particular structure, the collection of these files also allows combining the macromolecular structures to obtain statistical information about macromolecules in general. This fact has been the basis for many structural biology methods including the molecular replacement method used in X-ray crystallography or homologous structure restraints in the refinement methods. With the success of methods

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15

Li, Zongcheng. "Conceptual design of shapes by reusing existing heterogeneous shape data through a multi-layered shape description model and for VR applications." Thesis, Paris, ENSAM, 2015. http://www.theses.fr/2015ENAM0025/document.

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Les récentes avancées en matière de systèmes d'acquisition et de modélisation ont permis la mise à disposition d'une très grande quantité de données numériques (e.g. images, vidéos, modèles 3D) dans différents domaines d'application. En particulier, la création d'Environnements Virtuels (EVs) nécessite l'exploitation de données nu-mériques pour permettre des simulations et des effets proches de la réalité. Malgré ces avancées, la conception d'EVs dédiés à certaines applications requiert encore de nombreuses et parfois laborieuses étapes de modélisation et de traitement qui impliquent plusieurs

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16

Walls-Bruck, Marcus. "Shape adaptive self-fixing structures using shape memory alloy actuation." Thesis, University of Bristol, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556738.

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Shape changing or morphing structures enable optimisation of structural configuration to suit current operating conditions. Conventional techniques for achieving shape change often result in weight and complexity penalties, which may outweigh the potential benefits of greater shape changing ability. The research presented in this thesis focuses on the use of shape memory materials to achieve a reversible change in shape of an innovative compliant composite structure, which may enable shape change without the drawbacks of conventional shape changing techniques. An initial concept was evaluated

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17

Rodriguez, Garcia Alberto. "Shape For Contact." Thesis, Carnegie Mellon University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3575524.

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<p>Given a desired function for an effector, what is its appropriate shape? This thesis addresses the problem of designing the shape of a rigid end effector to perform a given manipulation task. It presents three main contributions: First, it describes the contact kinematics of an effector as the product of both its shape and its motion, and assumes a fixed motion model to explore the role of shape in satisfying a certain manipulation task. Second, it formulates that manipulation task as a set of constraints on the geometry of contact between the effector and the world. Third, it develops tool

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18

Kim, Jeong-Gyoo. "Probabilistic shape models :." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433472.

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19

West, G. "Automated shape anthropometry." Thesis, Loughborough University, 1993. https://dspace.lboro.ac.uk/2134/7430.

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In medicine, ergonomics, the clothing Industry and many other areas such as the design of 'g' suits for military aeroplane pilots and protective clothing for chemical warfare, there is a requirement for the accurate 3-D measurement of the size and shape of the human form. To meet this need a novel whole body scanner has been designed which is capable of measuring both the size and shape of people in a non invasive socially acceptable manner. The scanner uses structured light and an array of television cameras to view free standing subjects while they are being rotated on an electrically driven

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20

Sroufe, Paul. "E‐Shape Analysis." Thesis, University of North Texas, 2009. https://digital.library.unt.edu/ark:/67531/metadc12201/.

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The motivation of this work is to understand E-shape analysis and how it can be applied to various classification tasks. It has a powerful feature to not only look at what information is contained, but rather how that information looks. This new technique gives E-shape analysis the ability to be language independent and to some extent size independent. In this thesis, I present a new mechanism to characterize an email without using content or context called E-shape analysis for email. I explore the applications of the email shape by carrying out a case study; botnet detection and two possib

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21

Vittert, Liberty. "Facial shape analysis." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6669/.

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Stereophotogrammetric imaging systems produce representations of surfaces (two-dimensional manifolds in three-dimensional space) through triangulations of a large number of estimated surface points. Traditional forms of analysis of these surfaces are based on point locations (manually marked anatomical landmarks) as described in Chapter 1. An advanced application of these types of landmarks will be thoroughly examined in Chapter 2 through the concept of Ghost Imaging. The results of this chapter necessitated a reliability study of stereophotogrammetric imaging systems which is discussed in Cha

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22

Varón, González Ceferino. "Shape and phylogeny." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/shape-and-phylogeny(f432d494-9755-41f9-b067-431023ad3248).html.

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Geometric morphometrics, the science about the study of shape, has developed much in the last twenty years. In this thesis I first study the reliability of the phylogenies built using geometric morphometrics. The effect of different evolutionary models, branch-length combinations, dimensionality and degrees of integration is explored using computer simulations. Unfortunately in the most common situations (presence of stabilizing selection, short distance between internal nodes and presence of integration) the reliability of the phylogenies is very low. Different empirical studies are analysed

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23

Sroufe, Paul Dantu Ram. "E-shape analysis." [Denton, Tex.] : University of North Texas, 2009. http://digital.library.unt.edu/ark:/67531/metadc12201.

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24

Mio, Giulia <1991&gt. "SYLVIA PLATH:TAKING SHAPE." Master's Degree Thesis, Università Ca' Foscari Venezia, 2017. http://hdl.handle.net/10579/9826.

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Unveiling a side of Sylvia Plath that remained hidden for a long time: her passion for visual arts, this work involves discovering the other side of the artistic experience of the young woman, who was fascinated by painting but enraptured by writing. Retracing the growing path of the poet, it is possible to observe how, during her life, she shared the tensions and beauties of modernity being divided between the two major arts: painting and poetry. Shedding light on the events that brought her to the mental breakdown, the effort to share her sensations and thoughts works as a therapeutic exper

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25

Fonn, Eivind. "Computing Metrics on Riemannian Shape Manifolds : Geometric shape analysis made practical." Thesis, Norwegian University of Science and Technology, Department of Mathematical Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9868.

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<p>Shape analysis and recognition is a field ripe with creative solutions and innovative algorithms. We give a quick introduction to several different approaches, before basing our work on a representation introduced by Klassen et. al., considering shapes as equivalence classes of closed curves in the plane under reparametrization, and invariant under translation, rotation and scaling. We extend this to a definition for nonclosed curves, and prove a number of results, mostly concerning under which conditions on these curves the set of shapes become manifolds. We then motivate the study of geod

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26

Wang, Binhai. "Contour-based shape description and analysis for shape retrieval and classification." Thesis, University of East Anglia, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443090.

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27

Lu, Bin. "3D Die Shape Optimisation For Net Shape Forging of Aerofoil Blades." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501609.

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28

Maurel, Pierre. "Shape gradients, shape warping and medical application to facial expression analysis." Paris 7, 2008. http://www.theses.fr/2008PA077151.

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Cette thèse porte sur le domaine des statistiques de formes. Une forme peut être une courbe plane en 2D ou une surface en 3D. Afin de pouvoir définir ces statistiques (moyenne, modes de variation), nous avons étudié plus précisément, dans une première partie plutôt théorique, le recalage et la mise en correspondance de deux formes entre elle. Cela consiste à développer des moyens de déformer une forme sur une autre. Des distances sont définies entre deux formes et une descente de gradient est effectuée pour déformer la première en la seconde. Nous avons donc défini la notion de gradient sur l'

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29

Ruiz, Pujadas Esmeralda [Verfasser], and Thomas [Akademischer Betreuer] Brox. "Medical image segmentation with shape priors = Medizinische Bildsegmentierung mit Shape Priors." Freiburg : Universität, 2014. http://d-nb.info/1123478627/34.

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30

Dolog, Rostyslav. "Shape Memory Behavior of Ionomers and Their Compounds." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1386656054.

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31

Nain, Delphine. "Scale-based decomposable shape representations for medical image segmentation and shape analysis." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-11192006-184858/.

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Thesis (Ph. D.)--Computing, Georgia Institute of Technology, 2007.<br>Aaron Bobick, Committee Chair ; Allen Tannenbaum, Committee Co-Chair ; Greg Turk, Committee Member ; Steven Haker, Committee Member ; W. Eric. L. Grimson, Committee Member.

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32

Valdés, Amaro Daniel Alejandro. "Statistical shape analysis for bio-structures : local shape modelling, techniques and applications." Thesis, University of Warwick, 2009. http://wrap.warwick.ac.uk/3810/.

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A Statistical Shape Model (SSM) is a statistical representation of a shape obtained from data to study variation in shapes. Work on shape modelling is constrained by many unsolved problems, for instance, difficulties in modelling local versus global variation. SSM have been successfully applied in medical image applications such as the analysis of brain anatomy. Since brain structure is so complex and varies across subjects, methods to identify morphological variability can be useful for diagnosis and treatment. The main objective of this research is to generate and develop a statistical shape

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33

Peter, Adrian M. "Information geometry for shape analysis probabilistic models for shape matching and indexing /." [Gainesville, Fla.] : University of Florida, 2008. http://purl.fcla.edu/fcla/etd/UFE0022484.

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34

Kockar, Benat. "Shape memory behavior of ultrafine grained NiTi and TiNiPd shape memory alloys." Thesis, [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2543.

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35

Geurtz, Alexander. "Model based shape estimation /." Lausanne : EPFL, 1993. http://library.epfl.ch/theses/?nr=1180.

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36

Schamberger, Stefan. "Shape optimized graph partitioning." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=983282455.

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37

Alexa, Marc. "Shape spaces from morphing." Phd thesis, [S.l. : s.n.], 2002. http://elib.tu-darmstadt.de/diss/000213.

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38

Zubi, Stephan al. "Active shape structural model." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97445107X.

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39

Olsson, Karin, and Therese Persson. "Shape from Silhouette Scanner." Thesis, Linköping University, Department of Science and Technology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1348.

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<p>The availability of digital models of real 3D objects is becoming more and more important in many different applications (e-commerce, virtual visits etc). Very often the objects to be represented cannot be modeled by means of the classical 3D modeling tools because of the geometrical complexity or color texture. In these cases, devices for the automatic acquisition of the shape and the color of the objects (3D scanners or range scanners) have to be used. </p><p>The scanner presented in this work, a Shape from silhouette scanner, is very cheap (it is based on the use of a simple digital came

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40

Dodds, Jake Steven. "Particle Shape and Stiffness." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/8063.

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Particle shape is evaluated on three scales corresponding to form, roundness and roughness. Shape at each of these scales uniquely influences material behavior. The shape of sand grains is largely formed as magma cools. Subsequent cleavage and abrasion change the roundness and roughness of particles. Published results indicate that particle shape influences several aspects of granular systems behavior including stiffness, strength, the evolution of strength anisotropy, dilation, and the development of strain localization. The crushing of granite creates a particulate material with a unique an

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41

McKnight, Lorrita L. "Two-dimensional shape blending." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0020/MQ45097.pdf.

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42

Schenk, Merijn. "Shape selectivity in zeolites." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2003. http://dare.uva.nl/document/70569.

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43

Crumley, Zacharia. "Voxel-Space Shape Grammars." Thesis, University of Cape Town, 2012. http://pubs.cs.uct.ac.za/archive/00000783/.

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The field of Procedural Generation is being increasingly used in modern content generation for its ability to significantly decrease the cost and time involved. One such area of Procedural Generation is Shape Grammars, a type of formal grammar that operates on geometric shapes instead of symbols. Conventional shape grammar implementations use mesh representations of shapes, but this has two significant drawbacks. Firstly, mesh representations make Boolean geometry operations on shapes difficult to accomplish. Boolean geometry operations allow us to combine shapes using Boolean operators (and,

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44

Dimitrov, Pavel. "Flux invariants for shape." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19679.

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This thesis focuses on a particular class of representations of visual form, those based on the Blum skeleton [6]. We shall argue that such a representation has a number of desirable properties, which any good shape descriptor should possess. We shall begin this discussion in Section 1.1 but will keep it on a relatively high level leaving the details to Chapter 2. We shall then, in Section 1.2, review some of the previous work on skeletonization and identify the major computational difficulties encountered in the past. Finally, in Section 1.3, we shall briefly discuss how the method presented

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Deghani, Ali. "Shape separation by screening." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395671.

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Ritchie, David W. "Parametric protein shape recognition." Thesis, University of Aberdeen, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266898.

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This thesis investigates the use of parametric representations of protein surface shape as a computational method of recognising similar and complementary protein surfaces. Both two-dimensional and three-dimensional shape parametrisations are described. The 2D parametrisation is constructed as an expansion of real spherical harmonic basis functions. These may be augmented by special shape-scaled radial functions, using the Laguerre polynomials, to give a novel 3D parametric "surface skin" representation. Using the special rotational properties of the spherical harmonic functions, the 2D parame

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Underhill, Daniel Martin Lennard. "Ferromagnetic shape memory alloys." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607746.

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Janan, Faraz. "Shape analysis in mammograms." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:96aaecce-a7bd-404f-9916-778603dbb396.

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The number of women diagnosed with the breast cancer continues to rise year on year. Breast cancer is now the most common type of cancer in the UK, with over 55000 cases reported last year. In most cases, mammography is the first step towards diagnosing breast cancer. However, it continues to have many practical limitations as compared to more sophisticated modalities such as MRI. The relatively low cost of mammography, together with the ever increasing risk of women contracting the disease, has led to many developed countries having a breast screening program. These routine breast screens are

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49

Coates-Muller, Christine. "The shape of shadows." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/8019.

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This is a woman's journey backwards to her people and her place, taking her into deep memory and reconstruction of memory; and yielding moments of darkness she knows she must face, though she is hardly able. It is focused on her need to know her grandmother, and to understand her father's suicide and be reconciled to it. The narrator/protagonist, Catrina, artist and poet, writes a poem raising questions about her family: her grandfather who 'wears his face like blank feathers, night in his throat', her khaki father, her grandmother silently kneading bread. Sensing the presence of her grandmoth

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Schlebusch, Stephen A. "Events that shape genomes." Doctoral thesis, Faculty of Science, 2018. http://hdl.handle.net/11427/30987.

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The invention and development of Next Generation Sequencing has opened up new possibilities for exploring the genomes of non-model organisms. For this thesis, a diverse range of non-model species from both plants and animals were used to identify and answer questions of evolutionary interest in four case studies. In doing so, a wide assortment of methodologies were used and developed, taking full advantage of the versatility that whole genome sequencing can provide. The genome of the Natal Long Fingered Bat, Miniopterus natalensis, was assembled to investigate the genetic mechanisms responsibl

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