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Dissertations / Theses on the topic 'Lattic'

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Published: 4 June 2021
Last updated: 10 February 2022

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1

Craig, Andrew Philip Knott. "Lattice-valued uniform convergence spaces the case of enriched lattices." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1005225.

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Using a pseudo-bisymmetric enriched cl-premonoid as the underlying lattice, we examine different categories of lattice-valued spaces. Lattice-valued topological spaces, uniform spaces and limit spaces are described, and we produce a new definition of stratified lattice-valued uniform convergence spaces in this generalised lattice context. We show that the category of stratified L-uniform convergence spaces is topological, and that the forgetful functor preserves initial constructions for the underlying stratified L-limit space. For the case of L a complete Heyting algebra, it is shown that the
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2

Kanwar, Gurtej. "Linear algebra on lattices : Simit language extensions with applications to lattice QCD." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/105995.

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Thesis: M. Eng. in Computer Science and Engineering, Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 155-160).<br>This thesis presents language extensions to Simit, a language for linear algebra on graphs. Currently, Simit doesn't efficiently handle lattice graphs (regular grids). This th
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3

Galloway, Ben Andrew. "Properties of charmonium and bottomonium from lattice QCD with very fine lattices." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/8196/.

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Lattice methods are essential theoretical tools for performing calculations in quantum chromodynamics (QCD). To make theoretical predictions (or postdictions) of properties of hadrons, we must solve the theory of QCD which describes their constituent quarks — and conversely, to further our knowledge of quarks, which are fundamental constituents of matter, we must examine the properties of their hadronic bound states, since free quarks are not observed due to the phenomenon known as quark confinement. It is not possible to solve QCD analytically, and so we must turn to numerical methods such as
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4

Radu, Ion. "Stone's representation theorem." CSUSB ScholarWorks, 2007. https://scholarworks.lib.csusb.edu/etd-project/3087.

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The thesis analyzes some aspects of the theory of distributive lattices, particularly two representation theorems: Birkhoff's representation theorem for finite distributive lattices and Stone's representation theorem for infinite distributive lattices.
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5

Race, David M. (David Michael). "Consistency in Lattices." Thesis, North Texas State University, 1986. https://digital.library.unt.edu/ark:/67531/metadc331688/.

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Let L be a lattice. For x ∈ L, we say x is a consistent join-irreducible if x V y is a join-irreducible of the lattice [y,1] for all y in L. We say L is consistent if every join-irreducible of L is consistent. In this dissertation, we study the notion of consistent elements in semimodular lattices.
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6

Gragg, Karen E. (Karen Elizabeth). "Dually Semimodular Consistent Lattices." Thesis, North Texas State University, 1988. https://digital.library.unt.edu/ark:/67531/metadc330641/.

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A lattice L is said to be dually semimodular if for all elements a and b in L, a ∨ b covers b implies that a covers a ∧ b. L is consistent if for every join-irreducible j and every element x in L, the element x ∨ j is a join-irreducible in the upper interval [x,l]. In this paper, finite dually semimodular consistent lattices are investigated. Examples of these lattices are the lattices of subnormal subgroups of a finite group. In 1954, R. P. Dilworth proved that in a finite modular lattice, the number of elements covering exactly k elements is equal to the number of elements covered by exactly
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7

De, Souza Stephen William. "Lattice QED." Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/14759.

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We consider the question of the existence of an interacting continuum limit of Quantum Electrodynamics (QED). After a mention of why this limit may not exist and a discussion of how to formulate QED on a spacetime lattice we review the recent analytic and numerical work on the strong-coupling phase of QED. We take the view that there definitely exists a strong-coupling fixed point in the space of bare parameters but that the behaviour of renormalised quantities in its neighbourhood is not yet understood. For non-compact lattice QED with staggered fermions we develop an expansion in the inverse
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8

Nguyen, Ngoc Thanh. "Designed superlattices : from lattice matched to lattice mismatched building blocks /." view abstract or download file of text, 2007. http://proquest.umi.com/pqdweb?did=1417810791&sid=4&Fmt=2&clientId=11238&RQT=309&VName=PQD.

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Thesis (Ph. D.)--University of Oregon, 2007.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 209-231). Also available for download via the World Wide Web; free to University of Oregon users.
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9

Flygare, Mattias. "Non-abelian braiding in abelian lattice models from lattice dislocations." Thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-31690.

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Topological order is a new field of research involving exotic physics. Among other things it has been suggested as a means for realising fault-tolerant quantum computation. Topological degeneracy, i.e. the ground state degeneracy of a topologically ordered state, is one of the quantities that have been used to characterize such states. Topological order has also been suggested as a possible quantum information storage. We study two-dimensional lattice models defined on a closed manifold, specifically on a torus, and find that these systems exhibit topological degeneracy proportional to the gen
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10

Lundman, Anders. "Classifying Lattice Polytopes." Licentiate thesis, KTH, Matematik (Avd.), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-134707.

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This thesis consists of two papers in toric geometry. In Paper A we provide a complete classification up to isomorphism of all smooth convex lattice 3- polytopes with at most 16 lattice points. There exist in total 103 different polytopes meeting these criteria. Of these, 99 are strict Cayley polytopes and the remaining four are obtained as inverse stellar subdivisions of such polytopes. We derive a classification, up to isomorphism, of all complete embeddings of smooth toric threefolds in PN where N ≤ 15. Again we have in total 103 such embeddings. Of these, 99 are projective bundles embedded
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11

Chang, Shiow-Yun. "2-lattice polyhedra." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/25704.

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12

Collins, Alexander Rory Physics Faculty of Science UNSW. "Quantum lattice models." Publisher:University of New South Wales. Physics, 2008. http://handle.unsw.edu.au/1959.4/43408.

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This thesis presents studies of the low energy properties of nseveral frustrated spin-1/2 Heisenberg antiferromagnets using various analytic and computational methods. The models studied include the union jack model, the alternating Heisenberg chain, the Heisenberg bilayer model, and the spin-Peierls model. The union jack model is a Heisenberg antiferromagnetic spin model with frustration, and is analyzed using spin-wave theory. For small values of the frustrating coupling $\alpha$, the system is N{\' e}el ordered, while for large $\alpha$ the frustration is found to induce a canted phase. Spi
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13

Miller, Peter David. "Macroscopic lattice dynamics." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186962.

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The modulational behavior of exact oscillatory solutions to a family of non-linear systems of coupled differential equations is studied both numerically and analytically. The family of lattice systems investigated has applications ranging from theoretical biology to numerical methods. The goal is to obtain a description, given by a system of partial differential equations valid on long spatial and temporal scales, of the microscopic vibrations in the lattice. A theory of simple harmonic plane wave modulation is given for the entire family of microscopic systems, and the structure of the corres
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14

Wood, Andrew Maclean. "Lattice Boltzmann magnetohydrodynamics." Thesis, University of Glasgow, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312788.

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15

Pol, Joop van de. "Lattice-based cryptanalysis." Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690374.

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This thesis examines the use of lattice algorithms in cryptanalysis. Lattice algorithms have a rich history, and they have long been used in the context of cryptanalysis in various forms. Recently, the applications of lattice algorithms in cryptography have increased sharply in number, most notably due to the rise of lattice-based cryptography. The thesis begins by examining the state of the art in lattice-based cryptanalysis, outlining the important algorithms, and considering the performance of these algorithms in a practical setting. The remainder of the thesis is dedicated to extending the
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16

Karimianpour, Camelia. "Lattice-based cryptosystems." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27993.

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We describe a generalization of the NTRU cryptosystem over rings other than Z after giving a survey of some of the most famous lattice-based cryptosystems, namely, Ajtai-Dwork, GGH and NTRU. Our generalization, which follows the idea of CTRU and NTRU over Gaussian integers, implies one may extend the NTRU encryption scheme over integral domains up to some constraints. We give details for realizing such extensions over Euclidean domains and denote by ETRU the corresponding class of cryptosystems.
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17

Fruyt, Michèle. "Problèmes méthodologiques de dérivation à propos des suffixes latins en ...cus /." Paris : Klincksieck : Publ. de la Sorbonne, 1986. http://catalogue.bnf.fr/ark:/12148/cb34870469t.

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18

Luo, Li-Shi. "Lattice-gas automata and lattice Boltzmann equations for two-dimensional hydrodynamics." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/30259.

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19

Jin, Kang Meir Amnon J. "The lattice gas model and Lattice Boltzmann model on hexagonal grids." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Summer/master's/JIN_KANG_53.pdf.

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20

Lloveras, Sophie Anne. "Caratterizzazione di lieviti e batteri lattici per la fermentazione di latte caprino." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14623/.

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I prodotti lattiero caseari ottenuti a partire da latte di capra stanno prendendo sempre più piede in virtù delle numerose caratteristiche positive quale la maggiore digeribilità e ad un maggior contenuto di acidi grassi a corta e media catena. Inoltre anche il processo di fermentazione ad opera di ceppi con specifiche attività metaboliche può contribuire ad incrementare le proprietà funzionali del prodotto finito. Tuttavia, la produzione di latti caprini fermentati presenta alcuni aspetti critici legati all’ottenimento di coaguli di buona consistenza e viscosità. Lo scopo di questa speriment
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21

Mejía, Miranda Yuri. "The critical points of lattice trees and lattice animals in high dimensions." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43087.

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We study lattice trees and lattice animals in high dimensions. Lattice trees and animals are interesting combinatorial objects used to model branched polymers in polymer science. They are also of interest in combinatorics and in the study of critical phenomena in statistical physics. [Abstract portion beginning here modified and differs from the print copy]. Our study takes place in the nearest-neighbor and spread-out models on the d-dimensional integer lattice. On either graph, a lattice animal is a finite connected subgraph, and a lattice tree is an animal without cycles.   Let t_n and
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22

Judice, Sicilia Ferreira Ponce Pasini. "Animação de Fluidos via Modelos do Tipo Lattice Gas e Lattice Boltzmann." Laboratório Nacional de Computação Científica, 2009. http://www.lncc.br/tdmc/tde_busca/arquivo.php?codArquivo=181.

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Técnicas baseadas em física têm chamado a atenção da comunidade de computação gráfica, em especial para animação de fluidos (gás ou líquidos). As técnicas tradicionais para animação de fluidos são metodologias top-down baseadas em malhas 2D/3D, tais como Diferenças Finitas e Elementos Finitos, em conjunto com equações de fluidos Navier-Stokes. Entretanto, tais métodos têm um custo computacional alto. Uma alternativa é o uso de técnicas baseadas em Autômatos Celulares do tipo Lattice Gas (LGCA) e o Método de Lattice Boltzmann (LBM). A idéia básica desses métodos consiste em obter a dinâmica mac
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23

CAMPOS, LUIZ C. de. "Parametros de rede do quartzo-beta a 1003 K determinados por difracao multipla de neutrons." reponame:Repositório Institucional do IPEN, 2002. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11067.

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Made available in DSpace on 2014-10-09T12:47:46Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:08:26Z (GMT). No. of bitstreams: 1 08349.pdf: 3194587 bytes, checksum: 65eb4db04988a87107998b9237835cdd (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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24

Barber, Zeb. "Ytterbium optical lattice clock." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3284459.

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25

Foster, Damien Paul. "Lattice models of polymers." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305968.

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26

Pickles, Stephen M. "Algorithms in lattice QCD." Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/11256.

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The enormous computing resources that large-scale simulations in Lattice QCD require will continue to test the limits of even the largest supercomputers into the foreseeable future. The efficiency of such simulations will therefore concern practitioners of lattice QCD for some time to come. I begin with an introduction to those aspects of lattice QCD essential to the remainder of the thesis, and follow with a description of the Wilson fermion matrix M, an object which is central to my theme. The principal bottleneck in Lattice QCD simulations is the solution of linear systems involving M, and
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27

Marcantonio, Laurence Mark. "Unquenched lattice upsilon spectroscopy." Thesis, University of Glasgow, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341965.

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28

Hadizad, M. Reza. "Lattice dynamics of superlattices." Thesis, University of Essex, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292758.

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29

Lowe, A. P. "Lattice gauge-Higgs theories." Thesis, University of Southampton, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378268.

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30

Carney, Matthew Eli. "Discrete cellular lattice assembly." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101845.

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Thesis: S.M., Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 109-113).<br>Robotic assembly of discrete cellular lattices at super-hertz (>1Hz) assembly rates is shown to be possible by integrating the design of a modular robotic assembler with the specified lattice topology such that the lattice can itself be removed from the incremental assembly process. Limits to assembly rates are ultimately dependent on allowable error, system stiffne
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31

Jablonski, David A. "Visualization of lattice fields." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/74809.

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32

Mujica, Fernández Fernando R. (Fernando René). "Lattice gas wind tunnel." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13444.

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33

Davis, Brian. "Lattice Simplices: Sufficiently Complicated." UKnowledge, 2019. https://uknowledge.uky.edu/math_etds/60.

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Simplices are the "simplest" examples of polytopes, and yet they exhibit much of the rich and subtle combinatorics and commutative algebra of their more general cousins. In this way they are sufficiently complicated --- insights gained from their study can inform broader research in Ehrhart theory and associated fields. In this dissertation we consider two previously unstudied properties of lattice simplices; one algebraic and one combinatorial. The first is the Poincar\'e series of the associated semigroup algebra, which is substantially more complicated than the Hilbert series of that same a
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34

Kiran, Bangalore Ravi. "Energetic-lattice based optimization." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1091/document.

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La segmentation hiérarchique est une méthode pour produire des partitions qui représentent une même image de manière de moins en moins fine. En même temps, elle sert d'entrée à la recherche d'une partition optimale, qui combine des extraits des diverses partitions en divers endroits. Le traitement hiérarchique des images est un domaine émergent en vision par ordinateur, et en particulier dans la communauté qui étudie les images hyperspectrales et les SIG, du fait de son capacité à structurer des données hyper-dimensionnelles. Le chapitre 1 porte sur les deux concepts fondamentaux de tresse et
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35

Hutchinson, Robert Gorm. "Mechanics of lattice materials." Thesis, University of Cambridge, 2005. https://www.repository.cam.ac.uk/handle/1810/251949.

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36

Skullerud, Jon Ivar. "Renormalisation in lattice QCD." Thesis, University of Edinburgh, 1996. http://hdl.handle.net/1842/12965.

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This thesis investigates various aspects of the relation between the lattice and continuum formulations of quantum field theories, in particular QCD. The aim of this is to gain a better insight into the theory of QCD, and to be able to relate more accurately the numbers obtained from lattice simulations to experimental values for physical quantities. The first part of this thesis (chapters 1 and 2) gives a general introduction to quantum field theory, with emphasis on the lattice formulation of QCD. The first chapter describes the functional integral formulation of gauge theories and how it ca
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37

Simpson, Alan David. "Algorithms for lattice QCD." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/12946.

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Quantum Chromodynamics (QCD) is the present theory of the strong interactions between quarks and gluons. To simulate QCD on a computer we need to discretise the field theory onto a space-time lattice. After outlining the standard Wilson action for lattice QCD, we describe the improved Clover fermion action with reduced discretisation errors. This thesis describes various techniques required to simulate lattice QCD and their implementation on the UKQCD Grand Challenge supercomputer Maxwell, which is a parallel computer consisting of 64 nodes. The ideas behind Monte Carlo (MC) simulation are int
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Hands, Simon John. "Lattice theories with fermions." Thesis, University of Edinburgh, 1986. http://hdl.handle.net/1842/14982.

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39

Özyılmaz, Nagihan. "Lattice Boltzmann computations of grid-generated turbulence = Lattice-Boltzmann-Berechnungen von gittergenerierter Turbulenz." kostenfrei, 2009. http://d-nb.info/999753282/34.

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40

Fujii, Yutaka. "NMR Study on Organic Radical Antiferromagnets on Kagomé Lattice and Distorted Kagomé Lattice." Kyoto University, 2001. http://hdl.handle.net/2433/151581.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(人間・環境学)<br>甲第8668号<br>人博第111号<br>12||113(吉田南総合図書館)<br>新制||人||27(附属図書館)<br>UT51-2001-A756<br>京都大学大学院人間・環境学研究科文化・地域環境学専攻<br>(主査)教授 後藤 喬雄, 教授 前川 覚, 教授 冨田 博之<br>学位規則第4条第1項該当
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41

Gastineau, Nicolas. "Partitionnement, recouvrement et colorabilité dans les graphes." Thesis, Dijon, 2014. http://www.theses.fr/2014DIJOS014/document.

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Nos recherches traitent de coloration de graphes avec des contraintes de distance (coloration de packing) ou des contraintes sur le voisinage (coloration de Grundy). Soit S={si| i in N*} une série croissante d’entiers. Une S -coloration de packing est une coloration propre de sommets telle que tout ensemble coloré i est un si-packing (un ensemble où tous les sommets sont à distance mutuelle supérieure à si). Un graphe G est (s1,... ,sk)-colorable si il existe une S -coloration de packing de G avec les couleurs 1, ...,,k. Une coloration de Grundy est une coloration propre de sommets telle que p
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42

Mayr, Hannah. "Utilizzo di diversi starter microbici per la messa a punto di un processo fermentativo di una conserva vegetale a base di barbabietola rossa." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Lo scopo del lavoro è l’esplorazione della fermentazione come metodo di conservazione, con particolare riguardo alla fermentazione lattica dei prodotti di origine vegetale. Vengono illucidati i numerosi vantaggi degli alimenti fermentati, gli effetti benefici per la salute, ma anche i possibili pericoli connessi a questa tipologia di prodotti. Nella parte sperimentale del lavoro è stata studiata la possibilità di produrre una conserva fermentata a base di barbabietola rossa. La barbabietola cruda è stata fermentata a 22 °C per 20 giorni in barattoli di vetro. Sono state utilizzate diverse col
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Goosen, Gerrit. "Relational representations for bounded lattices with operators." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4343.

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Thesis (MSc (Mathematics))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Within lattice theory, an interesting question asked is whether a given abstract lattice may be represented concretely as subsets of a closure system on a topological space. This is true for boolean algebras, bounded distributive lattices and arbitrary bounded lattices. In particular, there are a multitude of ways to represent bounded lattices. We present some of these ideas, as well as an analysis of the differences between them. We further investigate the attempts that were made to extend the above repre
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Bystrik, Anna. "On Delocalization Effects in Multidimensional Lattices." Thesis, University of North Texas, 1998. https://digital.library.unt.edu/ark:/67531/metadc278868/.

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A cubic lattice with random parameters is reduced to a linear chain by the means of the projection technique. The continued fraction expansion (c.f.e.) approach is herein applied to the density of states. Coefficients of the c.f.e. are obtained numerically by the recursion procedure. Properties of the non-stationary second moments (correlations and dispersions) of their distribution are studied in a connection with the other evidences of transport in a one-dimensional Mori chain. The second moments and the spectral density are computed for the various degrees of disorder in the prototype latti
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45

Kreslavskiy, Dmitry Michael. "Lorentz Lattice Gases on Graphs." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/6423.

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The present work consists of three parts. In the first part (chapters III and IV), the dynamics of Lorentz lattice gases (LLG) on graphs is analyzed. We study the fixed scatterer model on finite graphs. A tight bound is established on the size of the orbit for arbitrary graphs, and the model is shown to perform a depth-first search on trees. Rigidity models on trees are also considered, and the size of the resulting orbit is established. In the second part (chapter V), we give a complete description of dynamics for LLG on the one-dimensional integer lattice, with a particular interest in showi
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Hou, An. "Strength of composite lattice structures." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/12475.

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47

Kurig, Carolin [Verfasser]. "Random lattice models / Carolin Kurig." Mainz : Universitätsbibliothek Mainz, 2013. http://d-nb.info/1037857364/34.

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48

Khedr, Mohamed Abdel Halim. "Seismic analysis of lattice towers." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=35904.

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In the absence of specific guidelines for the seismic analysis of self-supporting telecommunication towers, designers may be tempted to apply simplified building code approaches to these structures. However, these towers respond to earthquakes in a different fashion than that of shear buildings. The objective of this research is to propose simplified methods for the seismic analysis of self-supporting telecommunication towers.<br>The author studied the specific problem of self-supporting lattice telecommunication towers using numerical simulations and applying the modal superposition method an
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Vigliotti, Andrea. "Constitutive models for lattice materials." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114523.

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Natural materials are often characterised by a cellular microstructure which allows them to achieve a wide range of mechanical properties. This microarchitecture has provided inspiration for the development of high performance manmade structures and artificial materials. Among cellular solids, lattice materials are a subset characterised by an ordered, periodic, microstructure that can be tailored to achieve specific combinations of stiffness strength and density. This thesis presents a methodology for the derivation of constitutive models for lattice materials. The approach presented here is
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Karamov, Sergey Alexandrovich Catterall Simon. "Supersymmetric theories on the lattice." Related Electronic Resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2003. http://wwwlib.umi.com/cr/syr/main.

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