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 22 for “"Thick layers"”.
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Modeling of chemical mechanical polishing for shallow trench isolation
… or tethers. The micro motor is fabricated from thick layers of electroplated NiFe and copper, by our collaborators at Georgia Institute of Technology. The rotor and the stator cores are 4 mm in diameter each, and the entire motor is about 2 mm thick. During fabrication, SU-8 epoxy is used as a …
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Southern Discomfort: Performing Femininity In The Deep South
… is expressed in my work by the building-up of thick layers of mixed media, the wear-and-tear of the canvas, and through the presence of symbols such as “Suitable for Chubbies,” blonde hair, and the bee hive.
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Multilayer composite photonic bandgap fibers
… core surrounded by multiple coaxial submicron-thick layers of a high-refractive-index glass and a low-index polymer; these layers reflect external light from all incident angles and polarizations in the mid-IR range.
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Development of magnetic induction machines for micro turbo machinery
… or tethers. The micro motor is fabricated from thick layers of electroplated NiFe and copper, by our collaborators at Georgia Institute of Technology. The rotor and the stator cores are 4 mm in diameter each, and the entire motor is about 2 mm thick. During fabrication, SU-8 epoxy is used as a …
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A laboratory study of the friction behavior of granular materials
… slide-hold-slide (SHS) tests (3-1000 s) on 3 mm thick layers of quartz powder, alumina powder, Westerly granite powder, and Westerly granite blocks sheared at 25 MPa normal stress. Powders are conditioned in situ under controlled RH to create new surface area before shearing. A transition from …
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Effect of halite and calcite coatings on thermal infrared spectra wih implications for Mars exploration
… coatings, we investigated the effects of coating thickness and texture on the TIR reflectance spectra of halite- and calcite-coated glasses. We evaluated salt coating textures that could occur on Mars: 1) continuous, uniformly thick layers of salt without exposed substrate; 2) discontinuous …
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Salt to Scale: The Seasoning of Buildings
We exist in thick layers of ancient minerals and material formations that perform to shape human architectural practices. Yet, with a continuous desire to force materials into designs, humanity has never ceased to disregard the active strength of a material to perform with time. The next twenty …
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Implications for gas hydrate occurrence : 3D thermobaric modelling of central Spitsbergen
… of the GHSZ is most pronounced in areas with thick layers of permafrost, i.e., highlands and mountains, with the lateral extent governed by trends governing surface and subsurface thermobaric conditions. In Adventdalen, intrapermafrost heterogeneities, wet gas and pressure built-up near the …
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Elasticity and phase transitions of stishovite and NaCl at high pressure
… subducting lithospheric slabs. These thin (∼10km thick) layers subducted into the Earth mantle create regions of thermal, compositional and, hence, rheological heterogeneity. Being a key component of the mantle convection system, subducting slabs may counteract compositional stratification of the …
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Mechanical property characterization of metal nano-particle films for MEMS devices
… electronics, MEMS devices require comparatively thick layers, typically on the order of microns. In the micron-thickness regime, nanoparticle-based inks are the preferred means for material delivery, in large part due to the ability to deliver high solids content. However, sintered nanoparticle …
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A Nacreous Self-Assembled Nanolaminate for Corrosion Resistance on 2024-Al Alloy
Nanometer thick layers of clay and polymer were formed on mica, silicon, and aluminum 2024-T3 alloy using alternating solutions of positively and negatively charged polymer and clay, respectively. Atomic force microscopy was used to observe the morphology of the composite films on mica and silicon. …
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Elektrochemická detekce purinových bází pomocí tlustovrstvých Cu2O elektrod
Tato práce se zabývá problematikou výroby tlustovrstvých elektrod. Zaměřuje se na přípravu Cu2O pracovních elektrod metodou sítotisku a spray - coatingu na korundovém substrátu. V předkládané práci jsou obě metody přípravy elektrod popsány spolu se základními elektrochemickými metodami. Připravené …
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Crustal velocity structure in the southern coast belt, British Columbia, from a seismic refraction survey
… overlies a crustal velocity structure with three layers of approximately 10.0 km each. The upper and middle crust have average velocities of 6.20 and6.30 km/s, respectively. The lower crust consists of an upper and lower unit with average velocities of 6.50 and 6.65 km/s, respectively. Beneath the …
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Three-dimensional nanofabrication with elastomeric phase mask
… conformable, elastomeric phase masks to pattern thick layers of transparent, photosensitive materials in a conformal contact mode geometry. Aspects of the optics, the materials, and the physical chemistry associated with this method are outlined in chapter 1. We also combine micro/nanomolding, or …
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Reducing powder bed layer defects in slurry-based three dimensional printing
… parts directly from CAD files. Discrete slurry layers are deposited, into which a binder material is selectively ink-jet printed. This process is repeated until the last layer of the powder bed is deposited. Afterwards, the powder bed is re-dispersed in water, leaving behind the printed green …
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The Impact of Rolling Dynamic Compaction
… improving ground in situ and compacting soil in thick layers. Finally, the in-ground response of RDC was measured using buried earth pressure cells (EPCs) and accelerometers. Force was determined from the measured change in stress recorded by EPCs whereas displacement was inferred from the double …
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Utilisation of remote sensing for the study of debris-covered glaciers: development and testing of techniques on Miage Glacier, Italian Alps
… a profound impact on glacier mass balance with thick layers insulating the underlying ice and dramatically reducing ablation, while thin or patchy cover accelerates ablation through albedo reduction. Few debris-covered glaciers have been studied in comparison with ‘clean’ glaciers and their …
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Atomic structure and defects of III-V compound semiconductor strained-layer-superlattices for infrared detection
… SLSs (T2SLs) in the form of dislocation-free thick layers, theoretical promises of high device performance of these structures have yet to be realized, primarily due to the Shockley-Read-Hall recombination process which shortens the minority carrier lifetime. The microscopic origin responsible …
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Understanding massive disk galaxy formation through resolved stellar populations
… low mass galaxies. We do not detect a separate thick disk in any of the three galaxies, even though our observations cover a larger range in equivalent surface brightness than any integrated light study. While scaleheights increase with age, each population can be well described by a single …
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The Effect of Long-Term Thermal Cycling on the Microcracking Behavior and Dimensional Stability of Composite Materials
… [0/+45/-45/90]s and [0/+45/90/-45]s. The layer thickness of the materials range from a nominal 0.001 in. to 0.005 in. In addition to the variety of materials considered, three different thermal cycling temperature ranges are considered. These temperature ranges are ±250°F, ±150°F, and ±50°F. The …
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