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 10 of 10 for “"LHM"”.
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Transmission and reflection properties of layered left-handed materials
… properties of layered left-handed materials (LHM). In particular, the reflection properties of (LHM) slabs are studied for the Goos-Hanchen (GH) lateral shift phenomenon. We demonstrate a unique GH lateral shift phenomenon, which shows that both positive and negative shifts can be achieved …
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Novel electromagnetic radiation in Left-Handed materials
… charged particle inside a Left-Handed material (LHM) is studied through both theory and numerical simulations. A LHM is a material whose permittivity and permeability have negative real parts. In the analysis of this thesis, the general theory of Cerenkov radiation was first studied for the …
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Analysis, design, and implementation of a reconfigurable fractal volumetric left-handed metamaterial
… of Volumetric Left-handed Metamaterials (LHM) is overcoming their very narrow operational bandwidth. This thesis proposes two schemes to efficiently solve this difficulty: 1) a mechanism which reconfigures, at will, the frequency the LHM operates at, and 2) a novel arrangement of Split …
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Measurement and device design of left-handed metamaterials
… of a variety of left-handed metamaterial (LHM) structures are analyzed and measured to verify consistent behavior between theory an measurements. The structures are simulated using a commercial software program and a retrieval algorithm is used to determine the effective constitutive …
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Pneumatic balloon dilatation versus laparoscopic Heller's myotomy in idiopathic achalasia
Background Both laparoscopic Heller's myotomy (LHM) and pneumatic balloon dilatation (PBD) are widely used in the management of achalasia, but there is still no clarity as to which of these interventions is the best treatment for patients with the condition. Methods Newly diagnosed achalasia …
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Microwave Metamaterials for Compact Filters and Antennas
… Permittivität und linkshändiger Materialien(LHM) beim Entwurf von Antennen und Filtern als potenzielle Anwendungen in der Mikrowellentechnik erforscht. Bei der Untersuchung grundlegender Eigenschaften und Design-Methoden von Metamaterialien, widmet sich diese Arbeit zunächst den künstlichen …
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Modeling and fabrication of self-assembling micron-scale rollup structures
… ([mu]eff < 0) necessary for developing a LHM (left-handed material). Many successful materials combinations have been demonstrated. The layers in the recommended system are (from the bottom up) silicon dioxide, chrome, gold, and chrome. The smallest rollup diameter was achieved for a …
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A local model network approach to nonlinear modelling
… is presented: the Learning Hierarchy of Models (LHM), where local models can be sub-networks, leading to a tree-like hierarchy of softly interpolated local models. Constructive model structure identification algorithms are described, and the advantages of hierarchical 'divide-and-conquer' methods …
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Restoration and Adaptive Use of a Historic English Country Estate: A Learning History
… property. The Learning History Methodology (LHM), with its requisite interview process, was used as a means to record, validate and analyze various perspectives related to the preservation of the house. The completed narrative has the potential to inform future decisions made at Stowe and it …
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Terahertz response of microfluidic-jetted fabricated 3D flexible metamaterials
Conventional materials exhibit some restrictions on their electromagnetic properties. Especially in terahertz region, for example, materials that exhibit magnetic response are far less common in nature than materials that exhibit electric response. However, materials can be designed, namely …