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.
Results
Showing 1 to 20 of 519 for “"microscale"”.
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Benthic mineralization and microscale heterogeneity
… growing awareness of the naturally occurring microscale heterogeneity affecting the biogeochemical functioning. Studies on microscale dynamics have been facilitated by recent developments of high resolution sensors for 2-dimensional chemical imaging. The presented<br/>work has contributed to …
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Microscale controlled continuous cell culture
… be prohibitive in large reactors. An integrated microscale bioreactor with built-in fluid metering and environmental control will enable programmed experiments capable of generating reproducible data routinely. This work develops an instrument capable of supporting automated microscale continuous …
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Acoustic Metamaterials at the Microscale
… of this class of acoustic metamaterials at the microscale. We present novel measurement techniques for wave velocity of three-dimensional architected materials that employ laser-ultrasonic principles, demonstrating a tunable range of wave velocities around 1000 m/s for different designs in a …
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Low Frequency Microscale Energy Harvesting
The rapid advancement in complimentary metal-oxide-semiconductor (CMOS) electronics has led to a reduction in the sizes of wireless sensor networks (WSN) and a subsequent decrease in their power requirements. To meet these power requirements for long time of operation, energy harvesters have been …
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A fluctuational electrodynamic analysis of microscale radiative transfer and the design of microscale thermophotovoltaic devices
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Hydraulically-actuated microscale traveling energy recovery
As the demand for portable electrical power grows, alternatives to chemical stored energy may enable users with additional system capabilities. This thesis presents a miniature hydroelectric turbine system for use in wearable energy harvesting applications. A radial outflow turbine, which trades …
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Edge-Flames and Combustion at the Microscale
"Numerical studies are performed to examine several phenomena relevant to the dynamic behavior of laminar flames in devices whose critical dimensions are at or below classical quenching limits. The behavior of premixed and nonpremixed edge-flames in tune-periodic counterflows is modeled using a …
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Experiments and Simulations of Autonomous Microscale Robotics
Sub-millimeter microscale machines capable of navigating inaccessible spaces and remote locations are steadily approaching reality, with a rich literature emerging on externally actuated and supervised agents. In comparison, progress is slow towards autonomous, intelligent microscale agents. This …
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The ecology of prophages at the microscale
… controlling community development at the microscale, which is the approximately the scale at which many microbial communities assemble in nature. Using synthetic resource particles as scaffolds for the assembly of discrete, microscale ecosystems, I characterized the complex marine …
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Microscale Energy Transport in Lead Halide Perovskites
… energy transport, such as photon recycling and microscale heterogeneity. Understanding and quantifying these energy transport mechanisms is critical for scaling perovskite photovoltaic device areas. In this thesis, we explore how photon recycling affects energy transport both in the macro and …
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The manufacture and characterisation of microscale magnetic components.
Abstract unavailable please refer to PDF
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Mathematical Modeling of Microscale Biology in Polyelectrolyte Brushes
<p>Biological macromolecules including nucleic acids, proteins, and glycosaminoglycans are typically anionic and can span domains of up to hundreds of nanometers and even micron length scales. The structures exist in crowded environments that are dominated by multivalent electrostatic interactions …
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Fabrication and light management of microscale solar cells
… from different perspectives, using lightweight microscale semiconductor membranes with unconventional form factors. We start with the fabrication of second-generation silicon solar microcells, with enhanced processing robustness and energy conversion efficiency by utilizing a thermally grown …
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Microscale mechanical characterization of materials for extreme environments
Nanocrystalline metals are promising materials for applications that require outstanding strength and stability in extreme environments. Further improvements in the desirable mechanical properties of these materials require a better understanding of the relationship between their microstructure and …
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Fabrication and Analysis of Microscale Hydrogels and Polymers
… influence on the kinetic response of constrained microscale hydrogels.
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Solid-liquid interactions in microscale structures and devices
Liquid-solid interactions become important as dimensions approach mciro/nano-scale. This dissertation focuses on liquid-solid interactions in two distinct applications: capillary driven self-assembly of thin foils into 3D structures, and droplet wetting of hydrophobic micropatterned surfaces. The …
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Microscale dynamics in suspensions of non-spherical particles
… simulations were performed to investigate the microscale dynamics in suspensions of spherical and non-spherical particles. Two new algorithms were developed to enable studies with accurate hydrodynamics. The first algorithm was a high accuracy Stokesian Dynamics technique (SD) extended to a …
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