Dissertations / Theses on the topic 'Modular'
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Weidner, Jan [Verfasser], and Wolfgang [Akademischer Betreuer] Soergel. "Modular equivariant formality = Modulare äquivariante Formalität." Freiburg : Universität, 2014. http://d-nb.info/1123480745/34.
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Basson, Dirk Johannes. "On the coefficients of Drinfeld modular forms of higher rank." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86387.
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Thesis (PhD)--Stellenbosch University, 2014.ENGLISH ABSTRACT: Rank 2 Drinfeld modular forms have been studied for more than 30 years, and while it is known that a higher rank theory could be possible, higher rank Drinfeld modular forms have only recently been de ned. In 1988 Gekeler published [Ge2] in which he studies the coe cients of rank 2 Drinfeld modular forms. The goal of this thesis is to perform a similar study of the coe cients of higher rank Drinfeld modular forms. The main results are that the coe cients themselves are (weak) Drinfeld modular forms, a product formula for the discriminant function, the rationality of certain naturally de ned modular forms, and the computation of some Hecke eigenforms and their eigenvalues.
AFRIKAANSE OPSOMMING: Drinfeld modulêre vorme van rang 2 word al vir meer as 30 jaar bestudeer en alhoewel dit lankal bekend is dat daar Drinfeld modulêre vorme van hoër rang moet bestaan, is die de nisie eers onlangs vasgepen. In 1988 het Gekeler die artikel [Ge2] gepubliseer waarin hy die koeffisiënte van Fourier reekse van rang 2 Drinfeld modulêre vorme bestudeer. Die doel van hierdie proefskrif is om dieselfde studie vir Drinfeld modulêre vorme van hoër rang uit te voer. Die hoofresultate is dat die koeffi siënte self (swak) Drinfeld modulêre vorme is, `n produk formule vir die diskriminant funksie, die feit dat sekere natuurlik gede finiëerde modulêre vorme rasionaal is, en die vasstelling van Hecke eievorme en hul eiewaardes.
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Petersen, Dan. "Admissible covers, modular operads and modular forms." Licentiate thesis, KTH, Matematik (Avd.), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-48923.
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This thesis contains three articles related to operads and moduli spaces of admissible covers of curves. In Paper A we isolate cohomology classes coming from modular forms inside a certain space of admissible covers, thereby showing that this moduli space can be used as a substitute for a Kuga–Sato variety. Paper B contains a combinatorial proof of Ezra Getzler’s semiclassical approximation for modular operads, and a proof of a formula needed in Paper A. In Paper C we explain in what sense spaces of admissible covers form a modular operad, by introducing the notion of an operad colored by a groupoid.Denna avhandling innehåller tre artiklar relaterade till operader och modulirum för godtagbara övertäckningar av kurvor. I artikel A isoleras kohomologiklasser associerade till modulära former inuti ett visst rum av godtag- bara övertäckningar, vilket visar att detta modulirum kan användas som ett substitut för en Kuga–Sato-varietet. Artikel B innehåller ett kombinatoriskt bevis av Ezra Getzlers semiklassiska approximation för modulära operader, och beviset av en formel som behövs i artikel A. I artikel C förklaras i vilken mening rum av tillåtbara övertäckningar utgör en modulär operad, nämligen en operad färgad av en gruppoid.
QC 20111124
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Ghitza, Alexandru Edgar 1976. "Siegel modulator form (mod p) and algebraic modular forms." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29346.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 2003.Includes bibliographical references (p. 101-104) and index.
In his letter [Ser96], J.-P. Serre proves that the systems of Hecke eigenvalues given by modular forms (mod p) are the same as the ones given by locally constant functions ... , where B is the endomorphism algebra of a supersingular elliptic curve. After giving a detailed exposition of Serre's result, we prove that the systems of Hecke eigenvalues given by Siegel modular forms (mod p) of genus g are the same as the ones given by algebraic modular forms (mod p) on the group GUg(B), as defined in [Gro99] and [Gro98]. The correspondence is obtained by restricting to the superspecial locus of the moduli space of abelian varieties.
by Alexandru Edgar Ghitza.
Ph.D.
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Kurth, Christopher. "Modular forms and modular symbols for noncongruence groups." [Ames, Iowa : Iowa State University], 2009.
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Tamir, Rotem. "Modular Envelops." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3086.
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This texts in about my thesis show; Modular envelopes which was presented in the Anderson gallery at may 2013. The text speaks about my individual process of making both this particular work and art in general.
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Crespo, Marina Rosa. "Coordenação modular: acepções contemporâneas." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/16/16132/tde-21122017-104312/.
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A coordenação modular é um sistema para ordenação relativa de dimensões, espaços e componentes construtivos. Sua aplicação tem manifestações remotas por princípios que controlam a composição e fixam escalas convenientes para as partes e o todo, todavia foi a produção seriada industrial que determinou o papel que a disciplina teria no século XX. No Brasil, seu desenvolvimento aconteceu entre as décadas de 1950 e 1970, quando foi determinada a formatação fundamental da disciplina. Identifica-se a partir da década de 1980 um intervalo nas discussões específicas que durou até a virada do século, quando foi recuperado o interesse pela área. É consenso entre os autores que ainda não houve no Brasil sucesso na implantação de modelos abrangentes da coordenação modular, mas faltam análises atualizadas. O objetivo da dissertação - examinar o desenvolvimento da disciplina no Brasil após 1986 - está fundamentado em indícios de que as discussões recentes não se aprofundam em temas atuais e de que há um enfraquecimento de uma visão integrada do problema. As principais conclusões indicam que o desenvolvimento da construção civil vem sendo acompanhado do afastamento da arquitetura de etapas da produção, o que afeta o exercício da coordenação modular e que o programa habitacional e as ações políticas de financiamento foram determinantes para a retomada das pesquisas. Entretanto, há ecos dos modelos estabelecidos pelo setor privado, com ênfase à racionalização e à aplicação de componentes industriais. Diante disso, destaca-se que a coordenação modular, como campo da coordenação dimensional, está ligada às necessidades humanas.Modular coordination is a system for relative ordering of dimensions, spaces, and building components. Its application presents remote manifestations through principles that control the design and set suitable scales for the parts and the whole. Nevertheless, the industrial mass production defined the role that the subject would play during the 20th century. In Brazil, its development took place between the 1960s and the 1970s; period that several authors consider decisive in what regards the subject\'s fundamental formatting. From the 1980s on, the specific debates about the matter went through a gap that lasted until the turn of the century when the interest in the field resurfaced. It is consensual among authors that Brazil still has not been successful to implement comprehensive modular coordination standards, but there is a lack of up-to-date analysis as well. The objective of the dissertation - to examine the discipline\'s development in Brazil after 1986 - is based on indications that recent discussions are leaving aside current issues and that there is a weakening of an integrated view of the matter. The main conclusions indicate that a dissociation between architecture and construction has accompanied the building industry\'s development, which affects the application of modular coordination. Moreover, the housing program and the research funding were decisive for the resumption of the field; nonetheless, there are echoes from the models established by the private sector, with emphasis on the rationalization and application of industrial components. In this context, it should be noted that modular coordination, as a field of dimensional coordination, is linked to human needs.
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Estrada, Eduardo Luis. "Formas modulares aplicadas a teoria dos numeros." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/307500.
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Orientador: Jose Plinio de Oliveira SantosDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação Cientifica
Made available in DSpace on 2018-08-06T00:16:28Z (GMT). No. of bitstreams: 1 Estrada_EduardoLuis_M.pdf: 1229842 bytes, checksum: 17b398d3ef955f687a933b77677a7113 (MD5) Previous issue date: 2006
Resumo: Abordamos, de maneira elementar, as estruturas algébrica e topológica sobre a qual são construídas as formas modulares, objetos principais do nosso estudo. Após a definição de formas modulares, realizamos um estudo particular sobre duas funções específicas relacionadas à teoria dos números: h(t) e. u(t). Trata-se de um texto introdutório, no qual apresentamos diversos conceitos e resultados extremamente importantes da teoria, tais como as demonstrações de que as duas funções supracitadas são formas modulares e a apresentação de uma fórmula explícita para seus sistemas multiplicadores
Abstract: In an elemmentary way, we have dealt with the algebraic and topological structures in which the modular forms are constructed. After the definition of this important tool, we have made a particular study about two specific functions related to number theory: h(t) and u(t). It is an introductory text, in which we have presented many concepts and results extremely importants of the theory, such as the proofs of the fact that the two functions h(t) and u(t) are modular forms and the presentation of an exact formula for their multiplier systems
Mestrado
Analise Matematica
Mestre em Matemática
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Bygott, Jeremy S. "Modular forms and modular symbols over imaginary quadratic fields." Thesis, University of Exeter, 1998. http://hdl.handle.net/10871/8322.
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Young, Quinn Eric. "Development of Modular Thermal Control Architecture for Modular Satellites." DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/217.
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Research has been completed to determine the most effective thermal control architecture for modular satellites. This research investigated principles of modularity, modular spacecraft examples, thermal control methods, and advanced thermal control technologies. A modular spacecraft was designed as a case study to determine key influences and issues. A number of thermal control architectures were developed. Each was evaluated for compatibility with modularity principles, thermal control performance, and a realizable implementation. Thermal control performance was determined by simulating on-orbit conditions for a number of design reference missions, including traditional thermal control architecture used for comparison. An effective thermal control architecture was found that has all desired attributes. The methods of development, simulation, and evaluation are presented with results and key findings.
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Elgenedy, Mohamed Atef. "High-voltage pulse generators incorporating modular multilevel converter sub-modules." Thesis, University of Strathclyde, 2018. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=29620.
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Recent research established the effectiveness of applying a pulsed electric field to deactivate harmful microorganisms (such as bacteria and E. coli). Successful deactivation is achieved by lethal electroporation; a process that produces electric pores in the biological cell membrane of the harmful microorganisms when subjected to high-voltage (HV) pulses. The HV pulses are designed to create pores beyond a critical size at which the biological cell can reseal. In contrast when applying non-lethal electroporation, the cell-membrane survives after the electroporation process. This is required, for example, when inserting protein cells in the cell-membrane. In both lethal and non-lethal electroporation, HV pulses in the kilo-Volt range (1-100 kV) with durations ranging between nanoseconds and milliseconds are required. This thesis proposes nine pulse generator (PG) topologies based on power electronic devices and modular multilevel converter sub-modules. The proposed topologies are divided into two main groups namely: PGs fed from a HV DC supply and PGs fed from an LV DC supply. The first group presents a new family of HV DC fed topologies that improve the performance of existing HV DC fed PGs, such as flexible pulse-waveform generation and full utilisation of the DC link voltage. The second group is dedicated to a new family of LV DC fed PG topologies which have flexible pulse-waveform generation, controlled operation efficiency, and high voltage gain. All the proposed PG topologies share the important aspect in the newly developed HV PGs, that is modularity, which offers redundancy and robust pulse generation operation. The presented PG topologies are supported by theoretical analysis, simulations, and experimentation.
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Malakuti, Somayeh, and Mariam Zia. "Adopting Architectural Event Modules for Modular Coordination of Multiple Applications." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-175973.
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Nowadays, large-scale software systems consist of multiple applications, which interact with each other to fulfill desired system-level requirements. It is usually required to coordinate the interactions of the
constituent applications to ensure that the system-level requirements are
fulfilled. In this paper, we outline a set of requirements that must be
fulfilled to facilitate the modular composition of multiple applications.
We introduce the concept of architectural event modules, which are
abstractions to represent constituent applications and their coordination
logic in a modular and uniform way. We explain the implementation of
this concept in the EventReactor language, and define their formal semantics in processing events using the UPPAAL toolset. We illustrate
the suitability of architectural event modules in achieving modularity and
loose coupling in the composition of multiple applications by means of a
case study in the domain of energy-efficient computing.
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Hallehn, Philip, and Victor Lindgren. "Modular Internationalisation Strategy." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-253331.
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Purpose – Previously, modularity has mainly been studied in a production context. This paper highlights the opportunities and challenges of a modular strategy in an internationalisation context. It identifies which module components become active when entering new markets and suggests a model for how a modular internationalisation architecture can be designed. Design/methodology/approach – Results from a single case study of a multinational corporation in the vehicle industry, where managers of different departments involved in the internationalisation process support the possibility to create a modular internationalisation architecture. Findings – The findings suggest that the most important opportunities arising from modularity when entering new markets are the clear structure and shorter time to market. The main challenges to overcome are the risk of loss of flexibility and the issues of designing a modular architecture. Based on the key components in the case firm, one initial project-based departmentalised matrix structure is designed which can also help overcome the issues of choosing between standardisation and adaptation. Practical implications – The modular internationalisation architecture may help managers in multinational corporations who are already working with modularity in production to also organise the internal structure of their internationalisation process. Originality/value – This study includes a new model for multinational corporations entering new markets – the modular internationalisation architecture – which makes it possible to structure processes depending on internationalisation factors. The model should be seen as an initial suggestion of how a modular internationalisation architecture can be designed, but it may need to be further developed and tested. Keywords – International business, Internationalisation strategy, Organisational structure, Modularity, Modular processes, Modules, Components Paper type – Master’s thesis
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Wang, Haowu. "Reflective modular forms and Weyl invariant E8 Jacobi modular forms." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1I028/document.
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Cette thèse comprend deux parties indépendantes. Dans la première partie, nous développons une approche fondée sur la théorie des formes de Jacobi dont l'indice est un réseau pour classifier les formes modulaires réflexives sur des réseaux de niveau arbitraire. Les formes modulaires réflexives ont des applications en géométrie algébrique, en algèbre de Lie et en arithmétique. La classification des formes modulaires réflexives est un problème ouvert et a été étudiée par Borcherds, Gritsenko, Nikulin, Scheithauer et Ma depuis 1998. Dans cette partie, nous établissons de nouvelles conditions nécessaires à l'existence d'une forme modulaire réflexive. Nous prouvons la non-existence de formes modulaires réflexives et de formes modulaires 2-réflexives sur des réseaux de grand rang. Nous donnons également une classification complète des formes modulaires 2-réflexives sur des réseaux contenant deux plans hyperboliques.La deuxième partie est consacrée à l’étude des formes de Jacobi de $W(E_8)$-invariantes. Ce type de formes de Jacobi a une signification dans les variétés de Frobenius, la théorie de Gromov-Witten et la théorie des cordes. En 1992, Wirthm\"{u}ller a prouvé que l’espace des formes de Jacobi pour tout système de racines irréductible excepté $E_8$ est une algèbre polynomiale. Très peu de choses sont connues dans le cas de $E_8$. Dans cette partie, nous montrons que l'anneau bigradué des formes de Jacobi $W(E_8)$-invariantes n'est pas une algèbre polynomiale et prouvons que chacune de ces formes de Jacobi peut être exprimée uniquement sous la forme d'un polynôme en neuf formes de Jacobi algébriquement indépendantes introduites par Sakai avec des coefficients méromorphes $\SL_2(\ZZ)$-modulaires. Ce dernier résultat implique que, à indice fixé, l’espace des formes de Jacobi $W(E_8)$-invariantes est un module libre sur l’anneau des formes $\SL_2(\ZZ)$-modulaires et que le nombre de générateurs peut être calculé via une série génératrice. Nous déterminons et construisons tous les générateurs pour des indices petits. Ces résultats étendent un théorème de type de Chevalley au cas du réseau $E_8$This thesis consists of two independent parts. In the first part we develop an approach based on the theory of Jacobi forms of lattice index to classify reflective modular forms on lattices of arbitrary level. Reflective modular forms have applications in algebraic geometry, Lie algebra and arithmetic. The classification of reflective modular forms is an open problem and has been investigated by Borcherds, Gritsenko, Nikulin, Scheithauer and Ma since 1998. In this part, we establish new necessary conditions for the existence of a reflective modular form. We prove non-existence of reflective modular forms and 2-reflective modular forms on lattices of large rank. We also give a complete classification of 2-reflective modular forms on lattices containing two hyperbolic planes. The second part is devoted to the study of Weyl invariant $E_8$ Jacobi forms. This type of Jacobi forms has significance in Frobenius manifolds, Gromov--Witten theory and string theory. In 1992, Wirthm\"{u}ller proved that the space of Jacobi forms for any irreducible root system not of type $E_8$ is a polynomial algebra. But very little has been known about the case of $E_8$. In this paper we show that the bigraded ring of Weyl invariant $E_8$ Jacobi forms is not a polynomial algebra and prove that every such Jacobi form can be expressed uniquely as a polynomial in nine algebraically independent Jacobi forms introduced by Sakai with coefficients which are meromorphic $\SL_2(\ZZ)$ modular forms. The latter result implies that the space of Weyl invariant $E_8$ Jacobi forms of fixed index is a free module over the ring of $\SL_2(\ZZ)$ modular forms and that the number of generators can be calculated by a generating series. We determine and construct all generators of small index. These results give a proper extension of the Chevalley type theorem to the case of $E_8$
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Ivarsson, Mikael. "Modular relay control." Thesis, Mälardalen University, School of Innovation, Design and Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-10369.
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Enics Sweden AB, Västerås, is an electronics manufacturing services company with its main business in manufacturing electronics. Most, if not all, electronic devices that are manufactured are being widely tested before delivery to ensure proper functionality. Often during tests a large number of signals are measured by one to a few digital multimeters and are therefore controlled through relays. Relays are also used when applying stimuli with high currents or voltages to the unit under test.
This work have been focused on finding a concept, including designing and producing a prototype, for a modular relay control system for use in fabrication of small test systems and for use when there is a need for adding more relays to an existing system.
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Akin, Ihsan Haluk. "Spectral Modular Multiplication." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12610463/index.pdf.
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Spectral methods have been widely used in various fields of engineering and applied mathematics.
In the field of computer arithmetic: data compression, polynomial multiplication and
the spectral integer multiplication of Sch¨onhage and Strassen are among the most important successful utilization. Recent advancements in technology report the spectral methods may also be beneficial for modular operations heavily used in public key cryptosystems. In this study, we evaluate the use of spectral methods in modular multiplication. We carefully compare their timing performances with respect to the full return algorithms. Based on our evaluation, we introduce new approaches for spectral modular multiplication for polynomials and exhibit standard reduction versions of the spectral modular multiplication algorithm for polynomials eliminating the overhead of Montgomery&rsquo
s method. Moreover, merging the bipartite method and standard approach, we introduce the bipartite spectral modular multiplication to improve the hardware performance of spectral modular multiplication for polynomials. Finally, we introduce Karatsuba combined bipartite method for polynomials and its spectral version.
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Kaihara, Marcelo E., 直史 高木, and Naofumi Takagi. "Bipartite Modular Multiplication." Springer, 2005. http://hdl.handle.net/2237/2751.
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Ejouamai, Rachid. "Modular elliptic surfaces." Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27210.
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Möller, Björn. "Modular mechatronic mechanism /." Stockholm, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-372.
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Edgington, Padraic D. "Modular Bayesian filters." Thesis, University of Louisiana at Lafayette, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3712276.
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In this dissertation, I introduce modularization as a means of efficiently solving problems represented by dynamic Bayesian networks and study the properties and effects of modularization relative to traditional solutions. Modularizing a Bayesian filter allows its results to be calculated faster than a traditional Bayesian filter. Traditional Bayesian filters can have issues when large problems must be solved within a short period of time. Modularization addresses this issue by dividing the full problem into a set of smaller problems that can then be solved with separate Bayesian filters. Since the time complexity of Bayesian filters is greater than linear, solving several smaller problems is cheaper than solving a single large problem. The cost of reassembling the results from the smaller problems is comparable to the cost of the smaller problems. This document introduces the concept of both exact and approximate modular Bayesian filters and describes how to design each of the elements of a modular Bayesian filters. These concepts are clarified by using a series of examples from the realm of vehicle state estimation and include the results of each stage of the algorithm creation in a simulated environment. A final section shows the implementation of a modular Bayesian filter in a real-world problem tasked with addressing the problem of vehicle state estimation in the face of transitory sensor failure. This section also includes all of the attending algorithms that allow the problem to be solved accurately and in real-time.
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Kallsäby, Mattias. "Modular MiniTest Tester." Thesis, Luleå tekniska universitet, Datavetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65101.
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RealTest is a company located in V¨aster˚as, Sweden, that works with embedded systems and test systems. RealTest had a need for a new test system for one of their products, the MiniTester (MT) mk2 that is used to test Drive Control Units (DCUs) used on trains. The problems that had to be solved were, finding out the most common faults of the product, make the test system modifiable and scalable, have a software running on a Windows PC with a working GUI and test logic and design a hardware component measurement unit to generate and measure signals. The system described in this report is the software parts of the developed MiniTest tester that runs on a Windows PC as well as the hardware design. The programming of the measurement unit and the testing of that unit is not covered by this report. The hardware consist of custom PCBs and Arduino boards. The Windows PC programs implemented a GUI and test logic according to the goals with a few exceptions left for further work. These programs have been evaluated by emulating the hardware. The system is shown to be modifiable in practice by implementation and scalable in theory
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Meadowcroft, Thomas Andrew. "Modular multivariable control." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12554.
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Morrison, Ewan K. "Modular Frobenius manifolds." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/4260/.
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This thesis studies how a symmetry defined on the solution space to the WDVV equations, called the inversion symmetry, singles out a special class of solution: those that lie at its fixed points. We will learn how demanding invariance of the solution under this symmetry forces it to take on a very rich form: that of a quasi-modular function. We will also study how the corresponding principal hierarchies inherit this symmetry from the solution to the WDVV equations. More specifically, Chapter 1 is introductory material on the theory of Frobenius manifolds. We provide motivation, basic examples and tools that will be useful to us later. As such it contains no original material. The references [1,16,17,18,19,35,37] were extremely useful in the preparation of this chapter. Chapter 2 is based on [45], which was written in collaboration with Professor Ian Strachan. It appeared in Physica D: Nonlinear Phenomena. We study those solutions to WDVV that lie at the fixed points the inversion symmetry. By studying the transformation and homogeneity properties that such solutions must have, we set out a program for classification, with complete results presented for dimensions three and four, together with partial results for dimension five. We show how various examples that have appeared in the literature fit into our framework. Any material here that is not original is clearly referenced. Chapter 3 is background material on integrable systems. It begins with a little history of the KdV equation, and explores some of the key properties that make it interesting [15,13]. We move on to the construction of Poisson brackets on loop spaces [48,24], and more specifically Poisson brackets of hydrodynamic type. We then sketch Dubrovin's construction [16] of the principal hierarchy from the geometry of the Frobenius manifold. Chapter 4 is based on [44], a joint work with Professor Ian Strachan which appeared in International Mathematics Research Notices. We study how the inversion symmetry defined on the solution space to the WDVV equations lifts to the principal hierarchy. It turns out that the action is an example of a so-called reciprocal transformation, introduced by Rogers [52]. These results were obtained independently in [41], and more recently in [26]. There is also some background material which has been tailored from Dubrovin's work [10] on so-called almost dual solutions to WDVV. We give a definition of the inversion symmetry for these solutions and study how the inversion symmetry acts on the associated hydrodynamic systems. Chapter 5 is a very natural continuation of the results obtained in Chapter 4. Motivated by the Witten-Kontsevich theorem, Dubrovin & Zhang [23] showed how the inclusion of the elliptic Gromov-Witten invariants into the tau-function perturbs the equations of the hierarchy. The results of Chapter 5 show how to extend the symmetry found at the level of the hydrodynamic equations to these first order, (or genus one), deformations.
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Patel, Arushi Mukesh. "Modular Pattern Installation." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/83566.
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Traditional Indian screens utilize beautiful intricate patterns derived from nature to attain
spatial definition. Even though we utilize them as static objects with rigid boundaries, the
beauty of a screen provokes wonder as to what's on the other side. This sparked a question
of What if the screen itself was modular? This question became the basis of my thesis
exploration. The work is divided into two distinct studies. The first being the exploration of
making rigid materials flexible via pattern developed from basic geometry. The second being
the application of the first process on a 1:1 scale resulting in an interactive instillation. The final
installation demonstrates modularity of pattern in creating a rigid material flexible by defining
an urban landscape on Virginia Techs campus.Master of Architecture
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Kenvin, Ryan James. "ReThinking Modular Architecture." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/25289.
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Undertaking a work of architecture utilizing modular construction is, in most cases, a design project dominated, or at least driven by, the most technical aspects of architecture. Technical aspects which haven't been completely figured out yet. Rather than making the decision to use a pre-determined structural system in the project before going through the design process, my thesis offers an example of how a more traditional and balanced approach can improve resulting buildings. In addition, rather than allowing the technology of the module to create the form of the building, show how a thorough study of program and form can influence the structure, even in an endeavor which usually requires such hard-nosed engineering.Master of Architecture
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Fiume, Federico. "Emergency Modular Architecture." Doctoral thesis, Università degli studi di Trento, 2022. http://hdl.handle.net/11572/329050.
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In western countries, we are now living in a period of economic prosperity. This has undermined in a certain way the “world’s balances” in terms of social, economic and well-being equilibrium. In particular, well-being grows in parallel with its side effects: it allows the population to grow, which generates a rise of the resources need, with related risk of pauperization of the planet. The two main aspects of the current world’s living system crisis are climate change and widespread poverty, even and mainly in terms of lack of housing. Until some years ago one was the cause of the other: the building sector is the most energy consumer and CO2 emitter. Anyway, thanks to the contemporary knowledge and technology, this trend is inverted: it is now quite simple, and in several countries compulsory, to realize NZEB or ZEB constructions. However, especially in growing countries, the building industry is yet too slow to meet the contemporary changes which are consistently faster and pressing. The main theme is now to explore the possibility of generating a new building system which can be fast in construction, adaptable to changes and completely fade away. It must respond either to growing needs or to change during the time. All focusing on very low energy consumption in use and to production/disposal phases.
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Echevarría–Quintana, Marcos. "Metodología de diseño conceptual modular para la selección de variables modulares." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/334182.
Full textAbstract:
Recent research on the analysis of product development systems, refer to the search for methods to establish the links between the variables that apply to the design concept and development, in order to build bridges of communication that allowing understanding in global system s, is the convergence of knowledge into practical and simple solutions to determine the different product platforms with modular solutions.
The methodology FAS (Function - Assembly - Space) has been developed using different design methodologies for selecting between different relations. Now, in the search to find modular systems for complex products, FAS offer practical solutions for product platforms.
This methodology of the selection of the variables involved in the design concept through the cluster algorithm solution is able to find relations groups which enable development of modular systems.
The design objective of these modules tends to reduce product development times, to communication components, improvement in the management of information between system s and equipment, therefore to minimize development costs and production.
The traditional design paradigm is based on the idea of creating products to meet the needs of customers to which you want to convey. This idea is correct as long as the project objectives are met. But to improve the objectives in a global and competitive market, you have to take into account the needs of a larger population of customers with reduced resources, and this is being achieved with product platforms.
The product platform design has with significant advantages in terms of reducing the resources required for its development, the higher level of knowledge, increase sales and cost reduction. The disadvantages are the time or have visibility to the products on offer since if this is not available in the analysis period; the power of the platform products is greatly reduced.
The genera l contribution is intended to do with this thesis, is to change the paradigms that have classic or traditional design to a modular design concept.
Breaking the paradigm is to develop product platforms from the concept phase (group strategy), which from initial idea / concept of the project includes the development of modular platform s for a wider range of products to offer. The advantage which provides a development in the initial stages of surpasses traditional products platforms used in this epoch.
The FAS method gives simple, practical solutions in the search for modular systems that are part of a product platform. Following in the footsteps and taking into account the requirements for execution, this methodology is able to respond with workable solutions in the field of modular conceptual development, achieving a better understanding of the need to design under the concepts established, validated with an exterior mirror system and a cockpit system both used in automotive industry as an examples of modular design, that fulfil our hypothesis and objectives to create modular systems with this methodology.Las investigaciones recientes sobre el análisis de los sistemas de desarrollo de producto, hacen referencia a la búsqueda de metodologías que establezcan los vínculos entre las variables que aplican al concepto de diseño y desarrollo con e l objetivo de establecer puentes de comunicación que faciliten la comprensión en sistemas globales; Es decir, la convergencia del conocimiento hacia soluciones prácticas y sencillas que determinen las diferentes plataformas de producto con soluciones modulares. La metodología propuesta FAS (Función - Ensamble - Espacio) ha sido desarrollada a partir de las distintas metodologías de diseño para la selección de las relaciones entre distintos sistemas. Ahora bien, en la búsqueda de encontrar sistemas modulares en productos complejos, FAS oferta las soluciones prácticas para las plataformas de producto. La metodología parte de la selección de las variables involucradas en el concepto de diseño, y por medio de una solución algorítmica, basada en algoritmos de agrupación, es capaz de encontrar los grupos de relaciones que permitirán el desarrollo de sistemas modulares. El objetivo del diseño de estos módulos tiende a reducir los tiempos de desarrollo del producto, a la comunización de los componentes, a la mejora en el manejo de información entre los sistemas y equipos, y por tanto a minimizar los costes de desarrollo y producción. El paradigma de diseño tradicional, parte de la idea de crear productos para satisfacer las necesidades de los clientes a los cuales se quiere hacer llegar. Ésta idea es correcta siempre y cuando los objetivos del proyecto se cumplan. Pero para mejorar los objetivos, en un mercado mundial y competitivo, se tienen que tomar en cuenta el cubrir las necesidades de una población mayor de clientes con una reducción de los recursos, y esto se está logrando con las plataformas de productos. El diseño de plataformas de productos, tiene consigo ventajas significativas en cuanto a la reducción de los recursos necesarios para su desarrollo, mayor nivel de conocimiento, incremento de ventas y reducción de los costes. Las desventajas radican en el tiempo o visibilidad que se tiene de los productos que se ofertan, ya que si no se cuenta con éste periodo en el análisis, la potencia de los productos de la plataforma se reduce notablemente. La aportación general que se pretende hacer con ésta tesis, es la de cambiar los paradigmas que se tienen del diseño clásico o tradicional a un diseño conceptual modular. El paradigma a cambiar consiste en desarrollar plataformas de productos desde la fase de concepto (estrategia de grupo), en la que desde la idea inicial / conceptual del proyecto se contemple el desarrollo de plataformas modulares para un rango mayor de productos a ofrecer. Las ventajas que contempla un desarrollo en etapas iniciales aventaja a las de las plataformas de productos tradicionales que se utilizan en ésta época. La metodología FAS da soluciones prácticas y sencillas en la búsqueda de sistemas modulares que formen parte de una plataforma de productos. Siguiendo los pasos y tomando en cuenta los requerimientos para su ejecución, ésta metodología es capaz de responder con soluciones factibles en el campo del desarrollo modular conceptual, consiguiendo una mejor comprensión de la necesidad de diseñar bajo los conceptos que establece. La metodología se ha validado con los sistemas modulares de un espejo retrovisor y un tablero de instrumentos del sector automotriz, en el que los resultados satisfacen las hipótesis y objetivos de crear sistemas modulares a través de ésta metodología.
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Yun, Seung-kook. "Optimal self assembly of modular manipulators with active and passive modules." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/47822.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2009.Includes bibliographical references (p. 89-92).
In this thesis, we describe algorithms to build self-assembling robot systems composed of active modular robots and passive bars. The robotic module is the Shady3D robot and the passive component is a rigid bar with embedded IR LEDs. We propose algorithms that demonstrate the cooperative aggregation of modular robotic manipulators with greater capability and workspace out of these two types of elements. The distributed algorithms are based on locally optimal matching. We demonstrate how to build an active structure by the cooperative aggregation and disassembly of modular robotic manipulators. A target structure is modeled as a dynamic graph. We prove that the same optimality - quadratic competitive ratio - as for the static graph can be achieved for the algorithms. We demonstrate how this algorithm can be used to build truss-like structures. We present results from physical experiments in which two 3DOF Shady3D robots and one rigid bar coordinate to self-assemble into a 6DOF manipulator. We then demonstrate cooperative algorithms for forward and inverse kinematics, grasping, and mobility with this arm.
by Seung-kook Yun.
S.M.
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Sendanayake, Sukhi Vanessa. "Seismic mitigation of steel modular buildings using novel inter-modular connections." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/180893/1/Sukhi%20Vanessa_Sendanayake_Thesis.pdf.
Full textAbstract:
This research proposes novel inter-modular connections to enable the safe and reliable performance of modular building structures under seismic actions. The proposed connections are designed to shift possible failure locations away from critical structural members to provide effective seismic mitigation. Ultimately, this would result in a purely modular building frame that would be capable of resisting gravity and lateral loads without supplementary concrete shear cores or walls.
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Vicedo, Yann. "Applications of steel-plate composite structures for nuclear modular construction." Thesis, KTH, Betongbyggnad, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-302440.
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Despite being the world’s second most important low-carbon source of electricity, the development of nuclear capacities is limited and does not comply with the International Energy Agency’s Sustainable Development Scenario. One of the main reasons for this lack of development is high and increasing costs of new nuclear capacities. In fact, capital costs can account for more than 80% of the Levelized Cost of Energy of a new nuclear power plant. Design accounts for about 10% and construction accounts for about 20% of the total capital cost. The importance of design and construction in nuclear power plants’ costs is partly due to limitations of traditional construction methods regarding both technical possibilities and realization schedules. Modular construction methods are proposed to reduce new nuclear power plants’ construction costs, and in particular steel-plate composite structures modular construction. Steel-plate composite structures consist of a structural interaction between thin steel plates and precast concrete. The aim of this thesis was to evaluate the capacity of modular construction, using steel-plate composite panels, to fulfil nuclear safety and functional requirements; as well as to identify potential related gains and opportunities. Advantages and constraints of steel-plate composite modules were identified in scientific literature and intergovernmental opportunity studies, and were related to the specificities of nuclear structures’ design and construction. Steel-plate composite structures modular construction is based on the manufacturing of steel concrete composite modules outside of the civil works site. The higher productivity of workshops and the possible task parallelization may lead to significant construction schedules shortening and capital costs reduction. In addition, steel-plate composite modules offer new technical possibilities which may help solving some constructability issues. However, steel-plate composite structures modular construction requires a reconsideration of the traditional design and construction methods, as they imply new challenges and constraints. In particular, the modularization issue should be addressed as soon as possible in the design, and the module manufacturing capacities should be quickly identified or created in order to deliver properly manufactured modules on-time. Considering the advantages and constraints of steel-plate composite structures modular construction, it appears that steel-plate composite modules may fit advantageously most of the nuclear design requirements. However, due to the lack of feedback, it is proposed that the usage of steel-plate composite modules be limited to critical concrete structures of the containment building. In particular, it appears that the containment dome and the reactor pit construction may benefit from steel-plate composite structures construction methods.Trots att kärnkraften är världens näst viktigaste koldioxidsnåla elkälla är utvecklingen av kärnkraftskapaciteten begränsad och överensstämmer inte med Internationella energiorganets scenario för hållbar utveckling. En av de viktigaste orsakerna till denna långsamma utveckling är de höga och ökande kostnaderna för ny kärnkraftskapacitet. Kapitalkostnaderna kan faktiskt utgöra mer än 80 % av den energikostnaden för ett nytt kärnkraftverk. Konstruktionen står för cirka 10 % och byggandet för cirka 20 % av den totala kapitalkostnaden. Att projektering och byggande har så stor betydelse för kärnkraftverkens kostnader beror delvis på begränsningar i de traditionella byggmetoderna när det gäller både tekniska möjligheter och tidsplaner för genomförandet. För att minska byggkostnaderna för nya kärnkraftverk föreslås byggmetoder som bygger på moduler, ”modulära byggmetoder”, särskilt sådana byggmetoder för stålplåtskompositkonstruktioner. Stålplåtskompositkonstruktionen består av en tunn plåt som samverkar med förtillverkad betong. Syftet med denna avhandling var att utvärdera möjligheterna för modulära konstruktioner med stålplåtskompositpaneler att uppfylla kraven på kärnkraftssäkerhet och funktionalitet samt att identifiera potentiella vinster och förbättringar i samband med detta. Fördelar och begränsningar med stålplåtskompositmoduler identifierades i vetenskaplig litteratur och i mellanstatliga studier om möjligheter och relaterades till de särskilda egenskaperna hos kärnkraftstekniska konstruktioners utformning och konstruktion. Modulär konstruktion av stålplåtskompositkonstruktioner bygger på tillverkning av stålbetongkompositmoduler utanför byggarbetsplatsen. Den högre produktiviteten i verkstäderna och den möjliga parallelliseringen av arbetsuppgifter kan leda till en betydande förkortning av produktionstiderna och en minskning av kapitalkostnaderna. Dessutom erbjuder stålplåtskompositmoduler nya tekniska möjligheter som kan bidra till att lösa vissa byggbarhetsproblem. Modulbyggandet av stålplåtskompositkonstruktioner kräver dock en omprövning av de traditionella konstruktions- och byggmetoderna, eftersom de innebär nya utmaningar och begränsningar. I synnerhet bör modulariseringsfrågan tas upp så snart som möjligt i byggprocessen, och modultillverkningskapaciteten bör snabbt identifieras eller skapas för att kunna leverera korrekt tillverkade moduler i tid. Med tanke på fördelarna och begränsningarna med modulbyggandet av stålplåtskompositkonstruktioner verkar det som om stålplåtskompositmoduler med fördel kan uppfylla de flesta av kraven för kärnkraftsteknisk konstruktion. På grund av bristen på feedback föreslås dock att användningen av stålplåtskompositmoduler begränsas till kritiska betongkonstruktioner i inneslutningsbyggnaden. I synnerhet verkar det som om konstruktionen av inneslutningskupolen och reaktorstödstrukturen kan dra nytta av konstruktionsmetoderna för stålplåtskompositkonstruktioner
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Cai, Yulin. "Integral Points on Modular Curves, Singular Moduli and Conductor-Discriminant Inequality." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0098.
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Cette thèse traite de trois sujets en trois parties. Dans la première partie, nous étudions les points S-entiers de la courbe modulaire X0(p). Yuri Bilu a montré qu’en utilisant la méthode de Baker, on peut donner une borne effective de la hauteur de ces points en fonction de p, du corps de base et de l’ensemble de places S. Min Sha a rendu ce résultat explicite. avec une borne doublement exponentielle en dans p. Nous améliorons considérablement dans cette thèse le résultat de Sha, en obtenant une borne simplement exponentielle. Cela se fait en utilisant une version très explicite du principe de Chevalley-Weil basée sur des travaux de Qing Liu et Dino Lorenzini. Notre borne est non seulement plus nette que celle de Sha, mais également explicite en tous les paramètres. Dans la deuxième partie, nous considérons des modules singuliers de courbes elliptiques. Pour un module singulier fixe a, nous donnons une borne supérieure effective de la norme de x - a pour un autre module singulier x avec un grand discriminant. Dans la troisième partie, nous donnons une relation entre les conducteurs d’Artin d’un modèle Werestrass Y et ceux de deux modèles de Weierstrass donnés Y1,Y2. Avec cette relation, nous déduisons que l’inégalité conducteur-discriminant est valable pour Y si elle est valable pour Y1 et Y2This thesis discusses three topics, so it includes three parts. In the first part, we study S-integral points on the modular curve X0(p). Bilushowed that, using Baker’s method, they can be effectively bounded in terms of p, the base field and the set of places S. Sha made this result explicit, but the bound he obtained is double exponential in p. We drastically improve upon the result of Sha, obtaining a simple exponential bound. This is done using a very explicit version of the Chevalley-Weil principle based on the work of Liu and Lorenzini. Our bound is not only sharper than that of Sha, but is also explicit in all parameters. In the second part, we consider singular moduli. For a fixed singular modulus a, we give an effective upper bound of norm of x - a for another singular modulus x with large discriminant. In the third part, we give a relation between Artin conductors of a Weierstrass model Y and the ones of two given Weierstrass models Y1,Y2. With this relation, we know that the conductor-discriminant inequality holds for Y if it holds for Y1 and Y2
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Gray, Elizabeth. "The comparability between modular and non-modular examinations at GCE Advanced level." Thesis, University College London (University of London), 2002. http://discovery.ucl.ac.uk/10018985/.
Full textAbstract:
The prime concern of this thesis is the comparability of two types of assessment now prevalent in Advanced level GeE examinations. The more conventional linear scheme assesses all candidates terminally, and the only way to improve the grade awarded is to re-take the whole examination. In contrast, the relatively new modular schemes of assessment include testing opportunities throughout the course of study. This not only has formative effects but allows quantifiable improvements in syllabus results through the medium of the resit option. There are obvious differences between the two schemes, but this does not necessarily imply that they are not comparable in their grading standards. It is this standard which the thesis attempts to address by considering the different variabilities of each of the schemes, and how these might impinge upon the outcomes of the grading process as evidenced in the final grade distributions. A key issue is that of legitimate and illegitimate variabilities - the former perhaps allowing an improvement in performance while maintaining grading standards; the latter possibly affecting the grading standard because its effect was not fully taken into account in the awarding process. By looking at a linear and modular syllabus in mathematics, the differences between the two are investigated, and although not fully generalisable, it is clear that many of the worries which were advanced when modular schemes were first introduced are groundless. Most candidates are seen to use the testing flexibility to their advantage, but there is little evidence of over-testing. Perhaps the major finding is a negative one - that there is no clear evidence for any difference in grading standards between modular and linear schemes of assessment, although there are variabilities which go some way to explaining what appears to be enhanced performances by some of the weaker modular candidates.
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Asplund, Eric, and Joakim Kron. "Modular Apartments - A flexible wall construction for a connection between two modules." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129608.
Full textAbstract:
Rapporten baseras på den bostadsbrist som råder i Sverige. En alternativ lösning på bostadsbehovet är byggnationer av modullägenheter. Idag byggs det främst mindre modullägenheter riktade till unga vuxna och nyanlända. För att tillgodose fler behov måste flexibiliteten för moduler öka så att de kan formas om och byggas i olika storlekar. Det som besvaras i rapporten är vad modulhus är, vilka variabler det tas hänsyn till vid dimensionering av moduler, samt hur två moduler kan byggas ihop till en enhetlig lägenhet. Teorier är baserade på litteratursökningar, även från tidigare kurser inom byggteknik. Ett studiebesök gjordes på Junior Livings fabrik i Kungsör, för att få en mer konkret bild av modulverksamheten i landet. Resultatet av studien består av en framtagen träväggkonstruktion och en övergång, som ska kunna användas för att koppla samman två enskilda moduler till en gemensam lägenhet. Denna lösning är framtagen för företaget Junior Livings moduler. Stor vikt har lagts på dimensionering och uppbyggnad av väggen samt övergången som sedan illustrerats i datorprogrammet Revit. Materialen har tagits fram för att möta de variabler och krav som ställs på bostadshus i Sverige. U-värde har beräknats och jämförts med originalkonstruktion. Avslutningsvis följer en slutsats där frågeställningar besvarats utifrån den teori, det resultat och den analys som utförts i rapporten.
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Hidell, Markus. "Decentralized Modular Router Architectures." Doctoral thesis, Stockholm : Laboratory for Communications Networks, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4090.
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Snaith, Daniel Victor. "Overconvergent Siegel modular forms." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420391.
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Kammüller, Florian. "Modular reasoning in Isabelle." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624446.
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Galbraith, Steven D. "Equations for modular curves." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337773.
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The primary topic of this thesis is the construction of explicit projective equations for the modular curves $X_0(N)$. The techniques may also be used to obtain equations for $X_0^+(p)$ and, more generally, $X_0(N) / W_n$. The thesis contains a number of tables of results. In particular, equations are given for all curves $X_0(N)$ having genus $2 le g le 5$. Equations are also given for all $X_0^+(p)$ having genus 2 or 3, and for the genus 4 and 5 curves $X_0^+(p)$ when $p le 251$. The most successful tool used to obtain these equations is the canonical embedding, combined with the fact that the differentials on a modular curve correspond to the weight 2 cusp forms. A second method, designed specifically for hyperelliptic curves, is given. A method for obtaining equations using weight 1 theta series is also described. Heights of modular curves are studied and a discussion is given of the size of coefficients occurring in equations for $X_0(N)$. Finally, the explicit equations are used to study the rational points on $X_0^+(p)$. Exceptional rational points on $X_0^+(p)$ are exhibited for $p = 73,103,137$ and 191.
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Owens, Crystal (Crystal E. ). "Modular LEGO brick microfluidics." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/117456.
Full textAbstract:
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 93-96).
Wider use and adaptation of microfluidic systems is hindered by the infrastructure, knowledge, and time required to build prototype devices, especially when multiple fluid operations and measurements are required. As a result, rapid prototyping methods based on planar and three-dimensional printing are attracting interest; however, these techniques cannot produce structures with the resolution, smoothness, and feature size needed for standard microfluidic devices. Herein I present a new approach to rapidly construct modular microfluidic systems by modification and assembly of interlocking injection-molded blocks. I demonstrate this principle using micromilling of store-bought LEGO® bricks to create surface fluidic pathways on bricks, and develop procedures for sealing and interconnecting bricks to form modular, reconfigurable microfluidic systems. Micromilling using a desktop machine achieves channel dimensions of 50 pm in depth and 150 pm in width, or greater, etched into the sidewalls of blocks. Sealing these channels with adhesive films allows internal fluid pressure of at least 400 kPa. The intrinsic tolerances of injection molded bricks and their elastically averaged connections gives mechanical locating repeatability of 1 pm, which enables fluid to pass between bricks via an O-ring with >99.9% sealing reliability. Using the LEGO-based approach, I build systems made of assembled brick units for generating droplets, sensing light, sorting with inertial and magnetic forces, and repeatably positioning a smartphone camera, and characterize their performance. Then, I fabricate and measure LEGO-like bricks made by FDM and SLA three-dimensional printing, showing that they can integrate with injection-molded bricks to add useful function, although their surface quality, resolution, and material limit performance. In addition, I adapt these components for two educational activities for high school students: a colorimetric titration device and a modular designable boat. The standard interface among all bricks enables a wide variety of brick units to be incorporated onto a common platform, making this "lab on a brick" a new and viable platform for advancing research and education in microfluidics.
by Crystal Owens.
S.M.
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Kohler, Eddie 1973. "The Click modular router." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86585.
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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2001.Includes bibliographical references (p. 122-127).
by Eddie Kohler.
Ph.D.
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Bachelder, Laura Govoni 1971. "Semi-finished modular cells." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/63220.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Architecture, 2002.Includes bibliographical references (p. 62-64).
This thesis subject is a pre-fabricated element (cell): a system that employs natural, light, and economic materials to produce a near-finished portion of a building. The intent is to introduce sustainable design into construction industry through prefabrication. The cell has been envisioned both for permanent and temporary usage: in the former case, preeminently as a construction element, while in the latter, as a finished unit. In both cases, the cell is mainly an assembly of smaller components that can possibly be recycled and reused after dismantling without additional reprocessing. The main idea behind the cell is to employ simple and small elements to achieve sustainable design.
by Laura Govoni Bachelder.
S.M.
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Kuncak, Viktor (Viktor Jaroslav) 1977. "Modular data structure verification." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38533.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 149-166).
This dissertation describes an approach for automatically verifying data structures, focusing on techniques for automatically proving formulas that arise in such verification. I have implemented this approach with my colleagues in a verification system called Jahob. Jahob verifies properties of Java programs with dynamically allocated data structures. Developers write Jahob specifications in classical higher-order logic (HOL); Jahob reduces the verification problem to deciding the validity of HOL formulas. I present a new method for proving HOL formulas by combining automated reasoning techniques. My method consists of 1) splitting formulas into individual HOL conjuncts, 2) soundly approximating each HOL conjunct with a formula in a more tractable fragment and 3) proving the resulting approximation using a decision procedure or a theorem prover. I present three concrete logics; for each logic I show how to use it to approximate HOL formulas, and how to decide the validity of formulas in this logic. First, I present an approximation of HOL based on a translation to first-order logic, which enables the use of existing resolution-based theorem provers. Second, I present an approximation of HOL based on field constraint analysis, a new technique that enables decision procedures for special classes of graphs (such as monadic second-order logic over trees) to be applied to arbitrary graphs.
(cont.) Third, I present an approximation using Boolean Algebra with Presburger Arithmetic (BAPA), a logic that combines reasoning about sets of elements with reasoning about cardinalities of sets. BAPA can express relationships between sizes of data structures and invariants that correlate data structure size with integer variables. I present the first implementation of a BAPA decision procedure, and establish the exact complexity bounds for BAPA and quantifier-free BAPA. Together, these techniques enabled Jahob to modularly and automatically verify data structure implementations based on singly and doubly-linked lists, trees with parent pointers, priority queues, and hash tables. In particular, Jahob was able to prove that data structure implementations satisfy their specifications, maintain key data structure invariants expressed in a rich logical notation, and never produce run-time errors such as null dereferences or out of bounds accesses.
by Viktor Kuncak.
Ph.D.
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Omiecinski, Tomasz Adam. "Reconfigurable integrated modular avionics." Thesis, University of Bristol, 1999. http://hdl.handle.net/1983/e9e10bd7-72c6-4aff-9027-f297dded5e41.
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Integrated Modular Avionics standardises hardware and software platforms of Line Replaceable Modules (LRMs) and other system components in order to reduce the overall cost of system development. operation and maintenance. Several identical processing units within a cabinet. and fast communication media in the form of a backplane bus introduces further possibility of reconfiguring the system in terms of changing the applications performed by particular core LRMs. In this thesis a study into Reconfigurable Integrated Modular Avionics is presented. The main objectives of the project were to investigate the benefits, and feasibility of, employing autonomous dynamic in-tlight reconfiguration of the system as a means for providing fault-tolerance. In this approach, allowing processing modules to change their function permits the system to share the redundant modules as well as sacrificing less important avionics functions to sustain the more critical applications. Various architecture examples are reviewed in order to establish a system design that would support reconfiguration at a minimal cost. Two modified ARINC 651 architecture examples are proposed for implementation of dynamic in-flight reconfiguration. The benefits of reconfiguration are identified with the use of Markov state space analysis, and are found to be substantial with respect to the reduced number of redundant processing modules required to implement the system functions within the safety requirements. Suitable reconfiguration schemes are identified, and the most promising one is formally specified with the use of the Vienna Development Method. The safety properties of the scheme are shown based on the specification. In order to study the feasibility of autonomous dynamic reconfiguration, the scheme is implemented into two distinct systems, and the results of the practical observation of the system behaviour are presented and discussed. As the project was sponsored by the UK Civil Aviation Authority, a number of certification issues related to reconfigurable avionics systems are identified and discussed based on the practical implementation and previous theoretical analysis. It is concluded that dynamic in-flight reconfiguration of avionics systems can lead to substantial savings in terms of the reduced number of required core LRMs, and greater fault-tolerance than traditional non-reconfigurable systems
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Rue, Timothy James. "Modular Vehicle Design Concept." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51219.
Full textAbstract:
Outlined herein is the Modular Vehicle [MODV] concept as a cost effective, utilitarian, and
highly functional vehicle concept for the changing demands placed on a MAGTF [Marine
Air-Ground Task Force] or SP-MAGTF [Special Purpose Marine Air-Ground Task Force] in
the 21st century. A large focus is put on the importance of modularity and cost effectiveness
of having a 24 hour configurable vehicle to a specific mission and area of operation.
Off-road vehicle progression through history is presented and successful design features are
noted in order to develop underlying goals for the modular vehicle. The thesis emphasizes
recent technology advancements that can shift the foundations of vehicle design including
wheel hub motors, high capacity batteries, solid oxide fuel cells, autonomy, structural health
monitoring, energy harvesting shock absorbers, non-pneumatic tires, and drive-by-wire options.
Predictions on the outlook for the technology progressions is discussed to give insight
into the viability of basing a vehicle concept on these technologies. Finally, physical design
bounds are presented to provide a foundation for the future design of such a vehicle.Master of Science
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Alencar, Jeovah Pereira de. "Aritmética modular e criptografia." reponame:Repositório Institucional da UFABC, 2013.
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Rasin, Ezer. "Modular interactions in phonology." Thesis, Massachusetts Institute of Technology, 2018. https://hdl.handle.net/1721.1/121841.
Full textAbstract:
Thesis: Ph. D. in Linguistics, Massachusetts Institute of Technology, Department of Linguistics and Philosophy, 2018Cataloged from PDF version of thesis.
Includes bibliographical references (pages 153-162).
This thesis makes two separate claims about the architecture of phonology: (1) The computation of stress takes place in a distinct cognitive module from segmental phonology. This module is informationally encapsulated from segmental features. (2) Phonological generalizations over underlying representations can be captured in the lexicon. The claim in (1) suggests a departure from a consensus view in generative phonology since the 1950's. According to this view, multiple phonological computations, including the computation of word stress and segmental processes, are carried out in a single cognitive module known as phonology. In Chapter 1 I challenge this view in two steps. I first argue for a new phonological universal based on the stress patterns of around 400 languages: (3) STREss-ENCAPSULATION UNIVERSAL: the distribution of stress is never directly conditioned by segmental features. After reanalyzing reported counterexamples to the universal, I argue for an account of the universal in terms of a modular decomposition of phonology along the lines of (1). The claim in (2) suggests a return to the architecture of early generative phonology, in which phonological generalizations could be captured in the lexicon (using constraints on underlying representations) as well as in the mapping from underlying representations to surface forms. Most recent work in phonology has abandoned that architecture, taking the lexicon to be merely a storage place for lexical items. Chapter 2, written jointly with Roni Katzir, presents an argument for constraints on underlying representations from learnability. In Chapter 3 I develop a new theory of blocking in non-derived environments, a phenomenon that has posed a long-standing puzzle for phonological theory since the 1970's. I argue that the new theory, which relies on constraints on underlying representations, offers a better account of the phenomenon than its predecessors.
by Ezer Rasin.
Ph. D. in Linguistics
Ph.D.inLinguistics Massachusetts Institute of Technology, Department of Linguistics and Philosophy
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Cordie, Troy P. "Modular reconfigurable field robotics." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/230503/1/Troy_Cordie_Thesis.pdf.
Full textAbstract:
This thesis explored the use of modular robots in the field. This work represents a step forward in robotics with technology emerging from the laboratory into the outdoors. Innovation is demonstrated through the ability to build custom robots on demand in the field. This customisation enabled by modular-reconfigurable components allowed a single person to deploy multiple configurations rapidly. Additionally, it was demonstrated that a modular reconfigurable approach to robotics improved robustness to failure. Finally, this work demonstrated that the ability to self-reconfigure allowed a field-deployed robot to explore further.
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Peng, Jiahao. "Performance and Design of Composite Modular System with Tenon Connections for Multi-Storey Buildings." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/26788.
Full textAbstract:
Modular building is an innovative construction method based on advanced manufacturing technologies, which is a more eco-friendly, effective, and cost-saving alternative than conventional methods. The primary objective of this thesis is to design a sufficient composite modular system for multi-storey applications and provide design recommendations based on system-level analyses under earthquakes, winds, and sudden column losses.
In the course of this thesis, a numerical model is first created for an existing tenon-connected inter-module connection to investigate its effects on the building’s lateral resistance. A cohesive interface model is used to account for the weld fracture. Due to the semi-rigid connectivity, there are around 53% and 28% reductions in the yield and maximum capacity of the building, respectively. The displacement coefficient method per American guidelines FEMA-356 is then adopted to predict the maximum deformation of the modular buildings under different design seismic loads. To strengthen the modular buildings, a novel composite modular system is newly proposed, which consists of concrete-filled steel tubular columns, laminated double beams, and integrated composite slabs. The structural responses of the composite modular buildings are assessed under design wind actions per Australian Standards AS 1170.0-2. The results indicate that the proposed buildings have sufficient design capacity but insufficient deflection control. The progressive collapse analysis is performed on the buildings in sudden column loss scenarios per Unified Facilities Criteria UFC 4-023-03. The results show that alternate load paths are activated after the notional column removals, and the progressive collapse is unlikely for the scenarios under consideration. Finally, the suitable dynamic increase factors of 1.90 and 1.60 are recommended for the 4- and 12-storey modular buildings, respectively, allowing peak dynamic responses to be predicted using the static approach.
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Wernz, Annalena Barbara Margit [Verfasser], Aloys [Akademischer Betreuer] Krieg, and Susanne [Akademischer Betreuer] Pumplün. "On hermitian modular groups and modular forms / Annalena Wernz ; Aloys Krieg, Susanne Pumplün." Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/121134584X/34.
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Wernz, Annalena [Verfasser], Aloys [Akademischer Betreuer] Krieg, and Susanne [Akademischer Betreuer] Pumplün. "On hermitian modular groups and modular forms / Annalena Wernz ; Aloys Krieg, Susanne Pumplün." Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/121134584X/34.
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Oman, Gregory Grant. "A generalization of Jónsson modules over commutative rings with identity." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1164331653.
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