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 27 for “"Dense Arrays"”.
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An MPI-based 2D data redistribution library for dense arrays
… and physical arrangement of data (such as dense arrays or matrices distributed over peer processes in a parallel program). This operation can be achieved by applying transformations such as transpositions or rotations or changing how data is mapped across the process grid P by Q, all of …
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Data parallelism with hierarchically tiled objects
… to tiling are only applicable to computations on dense arrays. This thesis makes several contributions, all in the general area of data parallel operators for the programming of multiprocessors and their current most popular incarnation, multicores. It accomplishes this through the development of …
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Optimization of transmit/receive array topology in 3D acoustic imaging
Acoustic imaging transmit and receive arrays pairs are simulated in the bistatic transmission case using Field II, an industry standard ultrasound toolbox. Analysis of imaging fundamentals, as well as simple transmit and receive array beam patterns reveals desirable beam pattern properties that can …
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The CAFE Experiment : a joint seismic and MT investigation of the Cascadia Subduction System
… we present results from inversion of data using dense arrays of collocated seismic and magnetotelluric stations located in the Cascadia subduction zone region of central Washington. In the migrated seismic section, we clearly image the top of the slab and oceanic Moho, as well as a velocity …
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The CAFE experiment : a joint seismic and MT investigation of the Cascadia subduction system
… we present results from inversion of data using dense arrays of collocated seismic and magnetotelluric stations located in the Cascadia subduction zone region of central Washington. In the migrated seismic section, we clearly image the top of the slab and oceanic Moho, as well as a velocity …
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Hydraulic amplification for actuation in microelectromechanical systems
… Precision lithography would furthermore make dense arrays of microhydraulic systems possible, with the eventual goal being to create high power density microscale actuation and power generation systems. This document provides an overview of the design considerations required for a successful …
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Flow and solute transport in random cylinder arrays : a model for emergent aquatic plant canopies
… and lateral dispersion of passive solute in arrays of randomly-distributed cylinders, a model for emergent, rigid aquatic plants. Mean drag per cylinder length normalized by the mean interstitial fluid velocity and viscosity increases linearly with cylinder Reynolds number. In contrast to the …
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An Assessment of Visual Encounter Surveys for an Elusive Species: The Dunes Sagebrush Lizard (Sceloporus arenicolus)
… of large wind-blown sand dune complexes and dense arrays of shinnery oak (Quercus harvardii). This species occupies a narrow range in the Monahans Sandhills of Texas and the Mescalero Sands of New Mexico and like many habitat specialists, they are sensitive to disturbances within their …
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Understanding The Mechanism and Extent of Vlse Recombination In Borrelia Burgdorferi Using Next-Generation Sequencing
… recombination requires contact with dense arrays of host tissue cells and/or ECM components. To test this hypothesis, two methods, quantitative PCR and high-throughput sequencing were used determine the extent and nature of <em>vlsE </em>recombination within mouse tissues and <em>in …
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Experimental and numerical study of the rod shear test for determining steel-sand interface behavior
… tested were smooth and rough model piles in dense and loose sand. Results for the smooth pile tests are consistent with published values. However, tests with the dense and loose sands using rough piles produced interface friction values that were, in some instances, higher than the dilatant …
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Fabrication and characterization of porous metal emitters for electrospray applications
… of applicability in space. Electrospray emitter arrays have many advantages over existing electric propulsion devices including much lower mass per unit thrust and much lower volume per unit thrust than conventional ion and hall devices. Additionally, with emitter clustering, the thrust density …
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Size-dependent mechanical properties of beta-structures in protein materials
… a class of protein folds that employ dense arrays of H-bonds, are universal in strong protein materials such as silks, amyloids, muscle fibers and virulence factors. The biological recipe for creating strong, tough materials from weak bonds, however, has so far remained a secret. In …
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Vertical silicon nanowire arrays for gas sensing
… gas sensing due to the high density of nanowire arrays and the increased nanowire surface area per substrate area. However, the development of such devices has been limited by a number of challenges. Two of the key challenges in fabricating vertical silicon nanowire sensors are the difficulty of …
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Comparison of 4.5 Hz Geophones and a Broadband Seismometer in a Real Field Deployment
An analysis of waveforms, power spectral density and array responses was performed using geophones and broadband seismometers, co-deployed as part of a geologically motivated study. Broadband seismometers record excellent waveforms but, due to cost and deployment effort, wavefields are usually …
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Fabrication and transfer assembly of microscale, solid-state light emitting diodes and solar cells for transparent and flexible electronics applications
… to achieve a processing strategy that creates dense arrays of indium gallium nitride light-emitting diodes on a silicon wafer of (111) orientation and assemble them onto transparent and flexible substrates. This work produced novel form factors for solid-state lighting where small, …
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Templated self-assembly for complex pattern fabrication
… block copolymer self-assembly generates dense arrays of lines or dots without long-range order. Fortunately, physical features defined by electron lithography can guide the self-assembly of block copolymer. In our previous work, the orientation of cylindrical phase block copolymer was …
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Optical properties of metal nanoparticles and their influence on silicon solar cells
… deposition speed and anneal temperature. Dense arrays containing average particle sizes ranging from 25 nm to 250 nm were achieved using anneal temperatures lower than 200oC. The largest nanoparticles were found to exhibit high extinction from 400 nm to 800 nm.<br/>Depositing Ag …
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Optimisation of Hall cross devices towards magnetic particle counting
… both signal strength and homogeneity. However, dense arrays of individually contactable sensors must be fabricated to detect meaningful numbers of particles, limiting their usefulness. This work focuses on the optimisation of large area Hall cross sensors towards the goal of counting large …
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A study of carbon based materials for energy applications
… here produced a conical carbon structure and dense arrays of well defined catalysts.A prototype fuel cell was designed and crafted to employ the laser processed PEN as a proton exchange membrane. Some experiments were conducted regarding the transport of protons through laser processed PEN and …
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Biomechanics of the fibrillar adhesive system in insects
… soft pads with a relatively smooth surface or dense arrays of microscopic adhesive hairs with both designs having independently evolved in diverse taxa of arthropods and vertebrates. Biological adhesive pads out-perform conventional adhesives in many respects, making them important models for …
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