Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"braids"”.
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Braids of Song Gwead y Gân
… built today’s America is the starting point for Braids of Song. Its overarching concerns trace the interrelation between immigration, identity and creativity within a Welsh Trans-Atlantic context. Braids of Song is a mixed-genre collection of stories that acknowledges the preciousness of culture; …
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Least dilatation of pure surface braids
"This thesis finds its roots in the Nielsen-Thurston classification of the mapping class group, a result that is fundamental to the field of low dimensional topology. In particular, Thurston's work gives us a powerful normal form for mapping classes: up to taking powers and restricting to …
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On grid diagrams, braids and Markov moves
Grid diagrams are essential in the new combinatorial version [MOST07] of the Heegaard Floer knot homology, and proving that these homologies are actually knot and link invariants depends on knowing that two grid diagrams representing isotopic links are related by grid moves. The purpose of this …
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New proposals for the popularization of braid theory
Braid theory is a very active research field. Braids can be studied from variuos points of view and have applications in different fields, e.g. in mathematical physics and in biology. In this thesis we provide a formal introduction to some topics in the mathematical theory of braids and two …
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Planar Velocity Measurements in an Incompressible and a Weakly Compressible Mixing Layer
… stochastic estimate of a braid suggests that the braids are vertically oriented, as opposed to the oblique orientation seen in the incompressible mixing layer. In addition, the braids in the weakly compressible case have a vertically oriented stagnation line, as opposed to the braids in the …
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Solutions to the conjugacy search and decision problems in the braid group using finite conjugacy class invariants
For two braids, A, B ∈ Bn, the conjugacy decision problem asks whether another braid X ∈ Bn exists such that X−1 A X = B. If we know A, B ∈ Bn are indeed conjugate, the conjugacy search problem asks us to find a braid Y ∈ Bn such that Y −1 A Y = B. In this dissertation we investigate a number of …
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Knotting of optical vortices
… zero set. This procedure starts by constructing braids with strands that follow a lemniscate trajectory as they increase in height. These braids are closed using Milnor maps to form a function with a knotted or linked zero set. This braid contains a minimal amount of information rather than the …
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Study of the dynamics of transport and mixing using set oriented methods
… classification theorems to these braids. This gives a reduced order model for the dynamics of transport of the entire flow field using just a few points. Recent work has shown that this methodology can be used to estimate a lower bound on h<sub>f</sub> using the braids formed by …
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EXPATRIATES OF "GOOD" MOTHERHOOD: BEARING WITNESS, GUILT, AND BURDENS OF TRANSGRESSIVE MOTHERHOOD
… and no less anxiety-inducing. This collection braids original creative pieces with critical inquiry into the roots of disorienting riptides of motherhood mythology. The creative pieces include flash nonfiction essays and poetry; the critical inquiry explores historical narratives, critical …
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Combined Tension-Torsion Loading of Braided Composite Structures
… tension-torsion loading. Failure mechanism of braids was investigated by the plane stress theory. A contact-free three-dimensional digital image correlation (3D DIC) technique was used to derive detailed and continuous strain maps and understand buckling behaviour of TBCs. Benefitting from this …
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Close, A Family Memoir
<p>This manuscript braids together two narratives. One is about my immediate family: my father had three boys—my older brothers—with his first wife, who died, after two years of illness, when my brothers were young. I am his only child with my mother, who was twenty-six when she married my dad and …
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Composite circular braid mechanics
… This thesis will examine one class of circular braids encompassing an elastic core. By hypothesizing four modes of operation and incorporating primary influences, the mechanical response of the composite is predicted based on its initial parameters and material properties. The ability to model …
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Design of a bias-weaving machine : thread manipulation and other topics
… to be removed from the weave. A large set of braids which are produceable on the proposed bias-weaving machine are described, along with the machine operations required to produce them. The design of a tension-regulating thread package for use in this bias-weaving machine is also presented. …
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In-Network Processing For Mission-Criticalwireless Networked Sensing And Control: A Real-Time, Efficiency, And Resiliency Perspective
… setting, finding two node-disjoint routing braids with minimal total cost is NP-hard. We then design a heuristic algorithm to construct two node-disjoint braids with a transmission cost upper bounded by two shortest node-disjoint paths. And we design ProNCP, a proactive NC-based protection …
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Hydrological factors influencing the ecology of riverbed breeding birds on the plains' reaches of Canterbury's braided rivers : a thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in the University of Canterbury
… Nests are generally close to water, near minor braids, and on non-vegetated shingle substrates. On average there is a higher chance of nests being flooded on the Rakaia than on the Ashley where predation is more likely to reduce nesting success. Vegetation encroachment threatens nest site …
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Reinventing flexibility : a hybrid paradigm for Thai markets in Bangkok, Thailand
… vending and urban activities, resulting from the braids of streets networks. This place will become a new civic building type --- which is a cross-breed between street and architecture, landscape and buildings --- to assemble the public around their common needs for commodities, leisure, and …
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Pākehā counsellors consider their positioning: Towards postcolonial praxis
… as a braided stream of theorizing where braids divide and unite. A Foucauldian social constructionism underlies this project, which extends to a consideration of subjectification, agency and positioning theory. This study is also intentionally postcolonial drawing on Said’s seminal works, …
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The Magical Mystery Donkey Tour
… I envision as a three-part memoir. The memoir braids present-tense (2009) and past-tense (1969) travel stories. The narrator, a sixty-three year old woman who has taken extended leave from her job in response to her lifelong urge to get 'out of the box,' takes long camping trips in the American …
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Kazhdan-Laumon Categories and Representations
… and show that it categorifies the algebra of braids and ties, an algebra previously studied in knot theory; we then use this to provide conceptual and geometric proofs of new results about this algebra. After Bezrukavnikov and Polishchuk’s counterexample to Kazhdan and Laumon’s original …
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