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  1. Vacancy Clustering Phenomena in Silcon Carbide Reactor Components: A Multiple Time-Scale Atomistic Problem

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    Description: The goal of this dissertation was to elucidate the coalescence of vacancies in the cubic polytype of silicon carbide in a nuclear reactor relevant system. Large-scale empirical potential atomistic simulations were employed and the exploration of long time-scale behavior was performed through a new application of the parallel replica dynamics...
    Keyword: silicon carbide, damage, radiation, molecular dynamics, SiC, and cascade
    Subject: Mechanical Engineering
    Creator: David Edward Farrell
    Owner: Scholarly Digital Publishing
    Date Uploaded: 09/14/2018
    Date Modified: 09/14/2018
    Date Created: 2008-10-06
    Rights: In Copyright
    Resource Type: Dissertation
  2. Micro/Nanoscale Friction and Application of Surface Wettability in MEMS

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    Description: Micro/nanoscale friction behavior has drawn a great deal of attention because it can reveal friction behavior at the interface level and ultimately lead to the discovery of the origin or real mechanism of friction. Surface wettability is an important property of solid surfaces and has been widely used in fundamental...
    Keyword: Mechanical Engineering
    Subject: Mechanical Engineering
    Creator: Bo He
    Owner: Scholarly Digital Publishing
    Date Uploaded: 09/14/2018
    Date Modified: 09/14/2018
    Date Created: 2008-08-28
    Rights: In Copyright
    Resource Type: Dissertation
  3. Three problems in microfluidics: Electrokinetic instability, electrohydrodynamic self-assembly, and slip

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    Description: This thesis deals with three problems encountered in micro- and nano-fluidics: linear stability analysis of electrokinetic mixing in icrochannels, development of a general purpose numerical technique for fully resolved simulation of electrohydrodynamic particulate flows, and studying the phenomenon of molecular scale slip next to boundaries in micro- and nano-channels. Mixing...
    Keyword: Mechanical Engineering
    Subject: Mechanical Engineering
    Creator: Hua-Yi Hsu
    Owner: Scholarly Digital Publishing
    Date Uploaded: 09/14/2018
    Date Modified: 09/14/2018
    Date Created: 2008-08-28
    Rights: In Copyright
    Resource Type: Dissertation
  4. Protein Folding Under an Applied Force

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    Description: In this thesis we study protein folding with external force. In Part I we simulate the folding or unfolding procedure based on the two-state model. For constant-velocity experiments, the simulation results fit the experimental results. For constant-force experiments, we introduce cooperativity between domains to explain the different behavior between single...
    Keyword: Mechanical Engineering
    Subject: Mechanical Engineering
    Creator: Pengfei Diao
    Owner: Scholarly Digital Publishing
    Date Uploaded: 09/14/2018
    Date Modified: 09/14/2018
    Date Created: 2008-11-18
    Rights: In Copyright
    Resource Type: Dissertation
  5. SHAPE MEMORY ALLOY BASED MICRO-MESO SCALE MANIPULATOR

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    Description: The need for low-cost robust meso-scale "smart" robots (manipulators) that have no discrete parts (monolithic), no sensors ("self-sensing") and can be used in space-constrained systems, e.g., in microfactories, biomedical applications, etc., was the motivation for the current research. This study describes the design, fabrication and analysis of such a smart...
    Keyword: accordion spring, actuator, manipulator, kinetics of phase transformation, model of motion, NiTi, smart structures, self-sensing, laser assisted process, clamping, Shape Memory Alloys, nitinol, and direct metal deposition
    Subject: Mechanical Engineering
    Creator: Kostyantyn Malukhin
    Owner: Scholarly Digital Publishing
    Date Uploaded: 09/12/2018
    Date Modified: 09/12/2018
    Date Created: 2008-05-15
    Rights: In Copyright
    Resource Type: Dissertation
  6. Numerical and Experimental Studies of the Dynamics of Diffusion Flame Sheets

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    Description: A comprehension of the complex dynamics of gaseous combustion requires an understanding of the underlying fundamentals. In this dissertation, I examine planar diffusion flames from both an experimental and numerical perspective. In the first part of this thesis, I study the extinction of unstrained, planar counter-diffusion flames. The theoretical model...
    Keyword: Lewis number, diffusion flames, flame holes, extinction, counterflow, and unstrained flames
    Subject: Mechanical Engineering
    Creator: Jocelyn Elaine Renner
    Owner: Scholarly Digital Publishing
    Date Uploaded: 09/11/2018
    Date Modified: 09/11/2018
    Date Created: 2008-05-13
    Rights: In Copyright
    Resource Type: Dissertation
  7. Assessing and Increasing Z-Width of Haptic Displays with Active Electrical Damping

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    Description: The "Z-width" of a haptic display is the dynamic range of impedances that can be passively rendered. Haptic displays with larger Z-width generally render more realistic feeling virtual environments. The maximum passive impedance a haptic display can render is directly related to the quantity of physical damping in the mechanism,...
    Keyword: Z-width, haptic display, active electrical damping, and passivity
    Subject: Mechanical Engineering
    Creator: David W Weir
    Owner: Scholarly Digital Publishing
    Date Uploaded: 09/11/2018
    Date Modified: 09/11/2018
    Date Created: 2008-05-12
    Rights: In Copyright
    Resource Type: Dissertation
  8. Structural Integrity Assessment of Pin and Hanger Connection of Aging Highway Bridges using Finite Element Analysis

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    Description: The finite element method is used to investigate failure mechanisms in pin-hanger connections in aging highway bridges. Bridge pins and hangers are typically considered as critical elements whose failure may result in partial or entire collapse of the structure. The primary function of a pin-hanger connection is to allow for...
    Keyword: Civil Engineering
    Subject: Mechanical Engineering
    Creator: David Houcque
    Owner: Scholarly Digital Publishing
    Date Uploaded: 09/10/2018
    Date Modified: 09/10/2018
    Date Created: 2008-05-12
    Rights: In Copyright
    Resource Type: Dissertation
  9. A Biorobotic Study of the Rat Whisker System

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    Description: The rat whisker (vibrissal) system provides rats with an exquisitely acute tactile sense that has helped allow them to thrive all over the world. By actively rotating their whiskers back-and-forth ("whisking") against objects, rats can extract a rich variety of information including position, size, shape, orientation and texture. Today, however,...
    Keyword: active sensing, sensorimotor control, tactile sensors, neuromechanics, robotic whisker, and vibrissae
    Subject: Mechanical Engineering
    Creator: Joseph Hai Solomon
    Owner: Scholarly Digital Publishing
    Date Uploaded: 09/08/2018
    Date Modified: 09/08/2018
    Date Created: 2008-05-08
    Rights: In Copyright
    Resource Type: Dissertation
  10. Modeling of Shape Memory Alloys and Application to Porous Materials

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    Description: In the last two decades the number of innovative applications for advanced materials has been rapidly increasing. Shape memory alloys (SMAs) are an exciting class of these materials which exhibit large reversible stresses and strains due to a thermoelastic phase transformation. SMAs have been employed in the biomedical field for...
    Keyword: Phase transformation, Constitutive behavior, Shape memory alloys, Porous materials, Cyclic loading, and Simulations
    Subject: Mechanical Engineering
    Creator: Michele Panico
    Owner: Scholarly Digital Publishing
    Date Uploaded: 09/08/2018
    Date Modified: 09/08/2018
    Date Created: 2008-05-08
    Rights: In Copyright
    Resource Type: Dissertation