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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 48 for “"Archimedean"”.
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Analysis, design, and fabrication of Archimedean spiral antennas
… Here, wideband antennas are discussed and Archimedean spiral antennas are found to be appropriate elements for use in a new type of wideband array referred to as the wideband switched array. The design of an Archimedean spiral and a necessary wideband balun transformer feed structure are …
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Archimedean spiral antenna embedded with frequency selective surface for wideband applications
… antenna ranging from 3.1 GHz to 10.6 GHz. An Archimedean spiral antenna is the most potential candidate in the above mentioned applications as the antenna meets most of the above requirements. However, the practical implementation of spiral antenna is challenged by its bidirectional patterns, …
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Archimedean Screw Turbine Based Energy Harvester and Acoustic Communication in Well Site Applications
… was proposed. This thesis presents an Archimedean Screw Turbine (AST) based energy harvester that takes advantage of the abundant flow energy in the upper stream section of the oil production cycle, especially in the water injection wells and oil extraction wells, with the goal of …
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Complex Vector Lattices: Tensor Products And Multilinear Maps
In this thesis, we study completions of Archimedean real vector lattices relative to any nonempty set of continuous positively homogeneous functions defined on Rn. Examples of such completions include square mean closed vector lattices and geometric mean closed vector lattices. These functional …
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Kissing the Archimedeans
… problem will be related to the Platonic and Archimedean solids. On each polyhedra presented their vertices will have spheres expanding such that the center of each of these outer spheres are the vertices of the polyhedron, and these outer spheres will continue to expand until they become …
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Design and Analysis of Star Spiral with Application to Wideband Arrays with Variable Element Sizes
… array that uses different sized circular Archimedean spirals for each octave of frequency coverage. A two-octave WAVES array has been presented in the literature, but a gap in the two-octave frequency coverage exists along the principal axes. The star spiral antenna was developed to …
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Postmodern philosophy, relativism, and a renewed vision of education
… of modern philosophy. By denying the ultimate Archimedean point for grounding truth, objectivity, and rationality, postmodern philosophy invokes relativism in which the contingent, hermeneutical, and historical nature of human knowledge and rationality is emphasized.
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Resonant sensors for passive, real-time, and wireless characterization of biological analytes
… The patterns of the resonators, which are Archimedean spirals, are drawn on these substrates using an indelible marker with an XY plotter. These substrates are etched with a solution containing hydrogen peroxide and hydrochloric acid in order to remove the undesired copper.</p> <p>The …
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On the distribution of central values of Hecke L-functions
… families of characters besides those strictly of archimedean-type, especially as one expands their scope to proper finite extensions of Q. Consideration of these Hecke characters leads immediately to analogous questions concerning their associated L-functions.</p> <p>Using tools from p-adic …
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Counting supercuspidal representations of p-adic groups
Let F be a non-archimedean local �eld with residual characteristic p ~= 2. In this thesis we will deduce a formula for the number of irreducible supercuspidal representations of GLN(F), N C 1, with !�($F ) = 1 and level less than or equal to k. Following Blasco, we construct all irreducible …
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Understanding Ancient Math Through Kepler: A Few Geometric Ideas from The Harmony of the World
… having origins though Platonic philosophy and Archimedean works. Kepler gives two additional polyhedra, and a simple means for constructing the “divine” proportion is given.
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A Local Trace Formula and the Multiplicity One Theorem for the Ginzburg-Rallis Model
… exterior cube epsilon factor. Finally, in the archimedean case, we proved some partial results for the general generic representations by applying the open orbit method.
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Modeling of Spiral Waves Arising in Atrial Fibrillation
… then generalizing to spiral models. Both the Archimedean spiral and a spiral derived from the diffusion equation are used as possible candidates to resemble cardiac rotors found in the heart. We conclude by comparing the two spirals strike frequencies to electrodes and discuss their …
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Wideband planar array antennas: theory and measurements
… on wide bandwidth planar array design. An Archimedean spiral is suggested for the array element and a model for the element radiation pattern is presented. A wide bandwidth linear array is then analyzed using the element model. The array is made to operate over a two octave bandwidth by …
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On the mod-p representations of unramified U(2,1)
… E=F be an unrami�ed quadratic extension of non-archimedean local �elds of odd residue characteristic p and let G be the unitary group in three variable U(2; 1)(E=F). In this thesis, we explore the smooth representation theory of G over a �eld ~E of characteristic p. The main results are as …
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On the Evolution of the Heavenly Spheres: An Enactive Approach to Cosmography
… ecstatic bird’s eye view of the shaman to the ‘Archimedean point’ of modern science. It then examines how these cosmographic practices have shaped cosmological beliefs and paradigmatic assumptions. Next, the practical utility of this approach is demonstrated through the development of …
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Co-rank 1 Arithmetic Siegel--Weil
… groups. On the geometric side at nonsplit non-Archimedean places, the limit relates degrees of 0-cycles on Rapoport–Zink spaces and local contributions to heights of 1-cycles in mixed characteristic.
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Fields of rationality of cuspidal automorphic representations
… central character, prescribed behavior at the Archimedean places, and such that the finite component [pi] [infinity] has a [Gamma]-fixed vector, we expect the proportion of [pi] [epsilon] F with bounded field of rationality to be close to zero if [Gamma] is small enough. This question was first …
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Nonstandard Models in Measure Theory and in functional Analysis
… additive measures that take on values in a non-archimedean field and for which the measure of every singleton is 1. We have shown that, by taking the ratio with a suitable unit of measurement, from a numerosity it can be defined a non-atomic real-valued measure, and that every non-atomic measure …
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Birational Invariance of Punctured Log Gromov-Witten Theory and Intrinsic Mirror Constructions
… to enumerative problems considered in the non-archimedean construction of Keel and Yu, and use this to show the two approaches agree in most cases when both can be constructed. We also prove a classical-quantum period correspondence for smooth Fano pairs, with the classical periods encoded in …
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