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 59 for “"Hex"”.
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Analysis of the hex regulon in Pseudomonas aeruginosa
… metabolism. The activity of the enzymes in the hex regulon are required for catabolism of glucose and these activities are coordinately regulated. Previous work has shown that these enzymes are induced when grown on carbohydrates and catabolite repressed when grown on TCA cycle intermediates. …
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Enhancing Hex-dominant Meshes: Generation, Evaluation, and Simplification
Hex-dominant mesh generation has recently received increasing attention from researchers and the simulation community due to its robustness compared to pure hex-mesh generation techniques. However, simulation algorithms require a limited number of cell types and mesh elements of desired quality to …
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Virtual topology based hex-dominant meshing and re-meshing
… thesis builds on previous research on automatic hex-mesh generation and CAD-CAE integration to develop a novel framework for generating CAE analysis models from CAD design models. The framework uses ‘virtual topology’ to bridge the representation gap between CAD and CAE tools, overcome geometric …
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Der Transkriptionsfaktor Hex markiert eine Subpopulation von Endothelzellen bei der Embryonalentwicklung und der Tumorangiogenese
Das Homeobox-Gen Hex reguliert bei Vertebraten eine Vielzahl von Entwicklungsprozessen und steuert dabei die Zellproliferation und Differenzierung. Ziel dieser Arbeit ist es, das Hex-Expressionsmuster sowohl in der Frühphase als auch in späteren Entwicklungsstadien bei Hühnerembryonen zu …
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The mobility of endosulfan and chlorpyrifos in the soils of the Hex River Valley
… This study focuses on the area of the Hex River Valley where pesticides have been detected in water samples. The two pesticides, endosulfan and chlorpyrifos, were selected for the study based on their usage and toxicity. As an initial assessment a simple screening model was used to …
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Synthese von Dioxabicyclooctenen und Thymidinderivaten sowie deren Markierung mit PET-geeigneten Nukliden
… diente die 1,6-Anhydro-3,4-dideoxy-ß-D-erythro-hex-3-enopyranose, die nach 2-Tosylierung mit Kaliumbromid zur 2-Brom-1,6-anhydro-2,3,4-trideoxy-ß-D-erythro-hex-3-enopyranose und deren 4-Bromanalogon umgesetzt wurde. Die Produktzusammensetzung läßt eine SN1-Reaktion über ein allylisches …
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Female bodies as text : disobedient representations of the witch
… to fire the journey of my thesis production, Hex, from conception through to performance. As a Masters student in Theatre-making with a leaning towards performance, my particular area of focus is the physical: female bodies as text. To delineate this further, I concentrate on disobedient …
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Distributed Regular Topology Overlay Formation in Multihop Wireless Networks
… work we present two distributed algorithms, T-Hex and T-Tri, to create a regular overlay topology in randomly deployed wireless sensor networks. The algorithms implement localized self-healing to prevent frequent reconfigurations and elongate network lifetime. T-Hex creates a regular hexagonal …
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Adaptive Frame Fields for Polycube Generation and Quad Simplification
Hexahedral (hex) meshing is the problem of approximating a 3-dimensional volume with cube-like structures, and is used to discretize arbitrary volumes to solve PDEs. The structure of a hex mesh is largely guided by its singular graph. For a hex mesh to have good quality, the hexes must have …
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Structure and Function Analysis of a Plant Transcription Activator
… search of a gene bank. These cis-elements, hex-1 from the wheat histone H3 promoter and nos-1 from the nopaline synthase promoter of T-DNA, also bind ASF-1. Another tobacco nuclear factor, designated hex-i-specific binding factor (HSBF), binds only to hex-1, A tobacco cDNA library was …
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Generation and Optimization of Quadrilateral and Hexahedral Meshes
… research, automatic generation of quad- and hex- meshes with optimal structure remains a challenge. In-lieu-of generating a quad-mesh directly from an arbitrary input, structure simplification can be performed on quad-meshes obtained from triangular meshes. Several techniques utilizing local …
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Modeling of Multi-Pulse Transformer/Rectifier Units in Power Distribution Systems
… specific topologies are studied, the 12-pulse hexagon transformer/rectifier (hex t/r) and the 18-pulse autotransformer rectifier unit (ATRU). In both cases, detailed switching model results are used to verify the operation of the average model. In the case of the hex t/r, the average model is …
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Reaction of meta-diisopropylbenzene on acid molecular sieves and synthesis of zeolites by a vapor phase transport method
… sieves SAPO-5, mordenite, offretite, beta, hexagonal and cubic faujasite (hex and FAU), L, SAPO-37, and an amorphous silica-alumina at temperatures around 463 K in a flow-type fixed-bed reactor. A small amount of cracking is observed. The main reactions of meta-diisopropylbenzene are …
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All Hexahedral Meshing of Multiple Source, Multiple Target, Multiple Axis Geometries Via Automatic Grafting and Sweeping
… of finite element meshes composed entirely of hexahedra (all-hex) is an active area of research. All-hex meshes are desirable for their characteristic of high accuracy with a low node count. Sweeping is one of the most widely used algorithms for generating all-hex meshes. A limitation of …
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Effects of exercise and protein nutriture on the iron status of rats at selected intervals of gestation
… protein sedentary (HS), high protein exercise (HEx), low protein sedentary (LS), low protien exercise (LEx). Animals in the exercise groups swam continuously for 75 minuites the first day and 90 minutes daily thereafter, throughout the study. Hemoglobin, hematocrit, liver iron concentration and …
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Mitigating fouling of heat exchangers with fluoropolymer coatings
… results in the need for frequent heat exchanger (HEX) cleaning. In the dairy industry, the associated operating cost and environmental impact are substantial. Antifouling coatings are one mitigation option. In this work, the fouling behaviour of fluoropolymer, polypropylene and stainless steel …
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Polypropylene and Polycarbonate containers have a varied effect on coagulation after haemodilution, as judged by TEG® in vitro
… a 0.9% saline solution - Laevosan, Austria. 2. Hextend® (HEX), also a high molecular weight hetastarch (670/0.75 substitution ratio) in a balanced electrolyte, lactate and glucose solution - BioTime Inc, Berkeley, California, USA. 3. Saline 0.9% 4. Hartmann's Solution (Ringer's Lactate) The …
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An investigation into the National Water Act No 36 of 1998: Its impact and effectiveness on stakeholders in a Water Users' Association in a rural community in the Western Cape
… and the impact on the rural community of the Hex River Valley. This study interrogates the negligence to implement the policies and strategies of the NWA to redress the practice of segregated use of the water resource as a natural resource and the failure to address the pro-poor visions of the …
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Effects of foot placement on resultant joint moments in the lower extremity joints during the squat
… showed significantly larger hip extensor moment (HEX) and knee extensor moment (KEX) in the medium and wide stances and significantly larger ankle plantar-flexor moment (AP) in the narrow stance than the toe forward condition. Significant differences in HEX, KEX, and AP among the stance widths …
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