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 46 for “"Material. Structure"”.
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National Museum of Film and Photography, Washington, D.C.
… relationship that needs to exist among light, material, structure, and space.
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Voxelized Atomic Structure Framework for Atomistic Modeling of Multifunctional Materials
The behavior of material systems is governed by complex physical phenomena taking place over a hierarchy of length scales, making it computationally expensive to model with physics-driven simulation methods alone. Atomic systems at the first-principles level are typically considered the smallest …
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Fracture analysis in marine batteries by peridynamic theory
… are applied in CCM to describe the motion of material structure.;However, due to the limitation of PDEs, most of numerical techniques based on this theory have difficulties in describing the motion of material body with discontinuous fields, such as cracks and kinks. In order to have a better …
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Development of high-speed P-i-N photodetector for 50Gb/s optical link in data centers
… GaAs P-i-N photodiodes operating at 50Gb/s. The material structure and device scaling are determined through microwave analysis and simulation. Photodiodes of 20um aperture diameter is fabricated and subsequently characterized, showing both high bandwidth and low noise level. A small signal model …
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Exploring the Effect of Irradiation Time on the Damping of Surface Acoustic Waves
Finding relationships between material structure and properties is a key discipline of materials science. Many methods have been used to examine material properties, including transient grating spectroscopy (TGS). These properties were used to probe several scales of structure, and TGS has been …
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Analysis of a hybrid composite pressure vessel using multi-scale computed tomography techniques
… have been developed to characterise the material structure of PMCs, from the whole engineering structure geometry down to individual fibre level. The techniques have first been applied to a 'model' aerospace grade carbon/epoxy notched laminate loaded in-situ in tension to failure. The …
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Three -Port Modulation of Indium Gallium Phosphide/gallium Arsenide Transistor Lasers
Further material structure modification leads to the laser operation (quasi-continuous, ∼200 K) of an InGaP/GaAs/InGaAs HBLET with AlGaAs confining layers and an InGaAs recombination QW incorporated in the p-type base region. Furthermore, the microwave operation and modulation (3 GHz) of an …
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Commercialization of Quantum Dot White Light Emitting Diode technology
… Due to the fundamental difference of the material structure, QD LEDs will win a steady position among existing white LED patents and a hybrid fabless plus IP business model has the best position to promote this technology to maximize its benefits and potential for the entire LED industry.
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An investigation of fatigue in an Fe-based metallic glass by nanoindentation
… stress and the onset of plasticity in this material was observed. The results of fatigue in the as-received sample demonstrate material strengthening upon repeated loading, while the effect is absent in the annealed sample. The results are discussed in relation to material structure and free …
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Design, Fabrication, and Modeling of Indium Phosphide Double-Heterojunction Bipolar Transistors With Sub-Millimeter Wave Cutoff Frequency
… and compositional variations of the transistor material layers are studied with the goal of improving device bandwidth. The cutoff frequencies of double-heterojunction transistors are extended as high as 690 GHz while maintaining an off-state breakdown voltage greater than 3 V by using the …
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The Relationship of Structure and Material Through the Lens of Three Catholic Chapels
… a building should present itself relative to its structure. With modern building technologies and building codes, the structure of a building and the facade can often be very different. Modernist architects theoretically felt very strongly about the importance of material honesty in a buildings, …
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Flexible, stretchable, and transient electronics for integration with the human body
… system requires suitable choice of materials and engineered structures. Specific directions include overall miniaturization (e.g., Si nanomembrane) or composite material structure (e.g., carbon black doped elastomer) that provide effective mechanics to match those of biological …
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Biofabrication of a Heart Wall Section using the FRESH Bioprinting Method
… on three different aspects. The first is around materials that mimic the different cardiac wall tissue layers by testing the different materials pre- and post-crosslinked for their characteristics and behaviour. Secondly, it explores the adaptation of a 3D printer for bioprinting using the FRESH …
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Design and Characterisation of Hybrid Organic-Inorganic Materials for Luminescence Downshifting Devices
… matrix is commonly composed of organic polymeric materials; however, these can suffer from poor processability and durability to long-term UV exposure. An alternative to this is the use of hybrid organic-inorganic materials, which owing to their combined inorganic and organic components show …
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Material, acoustic, and mechanical properties of mosquito and midge antennae
… two allows, in absence of prior knowledge of the material properties of mosquito or midge antennae, to assess the material structure and to gauge which impact this distribution can have on the antenna's mechanical behaviour in response to sound. It was revealed that, rather than a simple beam of …
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A novel plasma etching and emission monitoring system (PEEMS) to assess protein and lipid spoilation for hydrogel contact lenses
… penetration of spoilants to be made for various material types. It is for this reason that the technique has been employed in this thesis. The technique is applied as a 'molecular' scalpel, removing known amounts of material from the target. In this case from both the anterior .and posterior …
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Analysis of the design of a car seatbelt : a study of the invention and a proposal to minimize the risk of injuries during pregnancy
… future steps to be taken in order to enhance the material structure of the three-point seatbelt design.
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Ab initio study of magnetic anisotropy of M-type hexaferrite thin films
Ferrites are a broad class of oxide materials with a wide range oftechnologically important applications. The M-type hexaferrites, ofwhich BaFe12O19 is taken as a prototype compound, show particular promise as very high density magnetic and magneto-optical datastorage media. There are still serious …
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Formation and Rupture of Nanofilaments in Metal/TaOx/Metal Resistive Switches
… 4) What are the most suitable conditions (material structure of the device and operation conditions) to set and reset multi nanofilaments? This work summarizes the current status of analysis of the data obtained while attempting to explain interesting phenomena like volatile switching and …
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Alloy Design for a Fusion Power Plant
… plasma and are absorbed by the surrounding material structure of the plant, transferring the heat of the reaction to an external cooling circuit. In such high-energy neutron irradiation environments, extensive atomic displacement damage and transmutation production of helium affect the …
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