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 39 for “"Geometric structures"”.
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Visualizing Geometric Structures on Topological Surfaces
… picturing twists as either distortions of the geometric properties of the surface or as a wrinkling of the surface while leaving internal measures unchanged. The language of groups gives us a way to distinguish geometric structures. Understanding the mapping class group is an important and hard …
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Geometric structures on the target space of Hamiltonian evolution equations
… Hamiltonian partial differential equations and geometric structures on the manifold in which the dependent variables take their values. Chapters 1 and 2 are introductory chapters, and as such contain no original material. Chapter 1 covers some basic material from the theory of integrable …
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Automatic modification of part geometries subject to manufacturing constraints using fuzzy logic
… algorithms capable of automatic modification of geometric models in response to manufacturing process constraints. Designers typically initiate product models using ideal, exact geometry; however, several non-traditional manufacturing processes frequently require slight modifications to the ideal …
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Topics in Geometric Machine Learning
… and astronomy, models must account for data structures. The emerging field of geometric machine learning has gained attention for enabling neural networks to handle geometric structures, unlocking novel solutions across scientific disciplines. Despite recent advances, theoretical gaps remain. …
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On triangles and quadrilaterals of groups
… the existence of a pair of algebraic and geometric structures on triangles of groups and on quadrilaterals of groups. These structures are an automatic and biautomatic structure. In addition, this paper also discusses the growth function for the quadrilaterals. We show that these groups …
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On special Kähler metrics and hypersurfaces
… In higher dimensions, there are special geometric structures, including Ricci-flat Kähler structures on complex manifolds. They are called Calabi-Yau manifolds. Generalizations include Kähler-Ricci soliton structures. In this dissertation, we study these special Kähler metrics and …
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General linear cameras : theory and applications
… to analyze the tangent planes on this manifold. Geometric structures associated with the local GLC model of each tangent plane provide an intuitive physical interpretation of the imaging system, and they are closely related to the caustics of reflected rays. These geometric structures are …
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Geometry Of Quivers
… explore some the connections between quivers and geometric structures. To begin, we consider a theorem that says every projective variety can be considered as a quiver Grassmannian. The reasoning of the proof is demonstrated by example. We then prove the existence of a countable quiver containing …
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From Pandemonium to Creative Production
… series of work. The foundations of the forms are geometric structures that are in the process of decomposing and transforming.</p> <p>Death at times is seen as final, but one needs to look beyond that process to see the nurturing quality of decay. The central geometric structure supports some …
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Development of Dual Extruder Biomaterial 3D Printer
… of biomaterial composites and complex geometric structures, thereby advancing sustainable, bio-inspired manufacturing. This thesis emphasizes the machine engineering aspects of the printer's development, including project motivation, systematic design methodology, component design and …
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Flux compactifications of Type II string theories under non-perturbative dualities
… action, which form an N = 2 theory. Their non-geometric structures, Bianchi constraints and tadpoles are determined and then classified in terms of modular S duality induced multiplets. The Z2 Z2 orientifold is used as an explicit example of the general methods, with N = 1 Type IIB …
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Matrix Isolation of Aryl(trifluoromethyl)carbenes, Heteroaryl(trifluoromethyl)carbenes and Phenylbis(trifluoromethyl)carbenes
… have dissimilar geometric structures leading to differentUV/Vis absorptions. In the studied pyridyl(trifluoromethyl)carbenes, 4-pyridyl(trifluoromethyl)carbene was the most stable one in matrice: no photoproduct from 4-pyridyl(trifluoromethyl)carbene was observed. …
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Uniform double wall microspheres/microcapsules for protein delivery
… allowable routes of administration. Also, the geometric structures of microparticles can influence the resulted release profile. In this project, by using the Precision Particle Fabrication method, we produced uniform double-wall microspheres (DWMS) with a protein-loaded (Bovine Serum Albumin) …
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Continuous and discrete aspects of Lagrangian field theories with nonholonomic constraints
… is a contribution to the differential-geometric treatment of classical field theories. In particular, I study both discrete and continuous aspects of classical field theories, in particular those with nonholonomic constraints. After some introductory chapters dealing with the geometric …
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DESIGN, SIMULATION AND OPTIMIZATION OF HIGH Q RF SPIRAL INDUCTORS ON SILICON CHIPS
… of the inductance L and the Q factor from the geometric structures of the inductors. The verification work has also been done to modify our scalable model with the measured results of various inductors.
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MULTIPLE STRUCTURE RECOVERY VIA PREFERENCE ANALYSIS IN CONCEPTUAL SPACE
Finding multiple models (or structures) that fit data corrupted by noise and outliers is an omnipresent problem in empirical sciences, includingComputer Vision, where organizing unstructured visual data in higher level geometric structures is a necessary and basic step to derive better descriptions …
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The numinous land : examples of sacred geometry and geopiety in formalist and landscape paintings of the prairies
… awareness of the sacred is found in archetypal geometric structures within the paintings and frequently in statements by the artists. Three of these archetypal forms, examples of a sacred geometry, are the Mandala or Medicine Wheel, the Horizon, and the Axis Mundi or World Tree. Sacred geometry …
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Infinitesimal Models of Algebraic Theories
… Geometry. This allows us to study well-known geometric structures and concepts from the viewpoint of infinitesimal geometric algebra. Infinitesimal models of algebraic theories generalise the notion of a model by allowing the operations of the theory to be interpreted as partial operations …
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Novel Approaches to Exposure Assessment and Dose Response to Contaminants in Drinking Water and Food
… in the chemical mixture. Slight shifts in geometric structures (isomers) can affect the fate and transport properties of the chemical mixture and as a result, the level of human exposure and dose response to each component in the chemical mixture. Odorous properties of both minor and major …
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Quantifying non-Fickian transport in porous and fractured media using fractional-calculus based stochastic models
… can refer to variations in the distribution of geometrical properties, as well as variations in the biogeochemical properties of the medium, which cannot be mapped exhaustively at all relevant scales. Complex geometric structures and intrinsic heterogeneity in geological formations affect …
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