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Real-Time 3-D Reconstruction By Means Of Structured Light Illumination, Kai Liu 2010 University of Kentucky

Real-Time 3-D Reconstruction By Means Of Structured Light Illumination, Kai Liu

University of Kentucky Doctoral Dissertations

Structured light illumination (SLI) is the process of projecting a series of light striped patterns such that, when viewed at an angle, a digital camera can reconstruct a 3-D model of a target object's surface. But by relying on a series of time multiplexed patterns, SLI is not typically associated with video applications. For this purpose of acquiring 3-D video, a common SLI technique is to drive the projector/camera pair at very high frame rates such that any object's motion is small over the pattern set. But at these high frame rates, the speed at which the ...


Localized Mechanical Deformation And Dissolution Of 45s5 Bioglass, Ding Li 2010 University of Kentucky

Localized Mechanical Deformation And Dissolution Of 45s5 Bioglass, Ding Li

University of Kentucky Doctoral Dissertations

Bioactive glasses react with the human physiological solution in control of their biofunctionality. The stress state in bioactive glasses determines the chemomechanical reaction and their biofunctionality. Using the microindentation technique, the effect of the indentation deformation on the surface damage and material dissolution of 45S5 bioglass was investigated.

The indentation-induced residual stresses were calculated. Complete anelastic recoveries of the indentation depths and the impression marks were observed for the first time, which was likely driven by the stored strain energy over the anelastic deformation zone. The indentation-induced local surface damages were revealed before and after the immersion tests in phosphate ...


Characterization Of Defects In Metal Sheets Via Infrared Thermography, Marc Anthony Harik 2010 University of Kentucky

Characterization Of Defects In Metal Sheets Via Infrared Thermography, Marc Anthony Harik

University of Kentucky Master's Theses

Defects in Aluminum, Stainless steel and galvanized steel sheets are studied in reflection mode infrared thermography. The effect of material properties, surface finish, heating intensity, heater emission spectra, pixel size and defect size are studied. Contrast is governed by heat quality, emissivity and defect geometry—which follows a logarithmic trend. The diameter detected via infrared thermography is found to be at least 30% larger than the measured diameter and sub-pixel defects can be detected. The use of gradient and Laplacian of temperature is introduced as a means of increasing defect contrast and mitigating heater variation.


Hydraulic Geometry Relationships And Regional Curves For The Inner And Outer Bluegrass Regions Of Kentucky, Ruth Roseann Brockman 2010 University of Kentucky

Hydraulic Geometry Relationships And Regional Curves For The Inner And Outer Bluegrass Regions Of Kentucky, Ruth Roseann Brockman

University of Kentucky Master's Theses

Hydraulic geometry relationships and regional curves are used in natural channel design to assist engineers, biologists, and fluvial geomorphologists in the efforts undertaken to ameliorate previous activities that have diminished, impaired or destroyed the structure and function of stream systems. Bankfull channel characteristics were assessed for 14 United States Geological Survey (USGS) gaged sites in the Inner Bluegrass and 15 USGS gaged sites in the Outer Bluegrass Regions of Kentucky. Hydraulic geometry relationships and regional curves were developed for the aforementioned regions.

Analysis of the regression relationships showed that bankfull discharge is a good explanatory variable for bankfull parameters such ...


Gold Nanospheres And Gold Nanorods As Localized Surface Plasmon Resonance Sensors, Akil Mannan Matcheswala 2010 University of Kentucky

Gold Nanospheres And Gold Nanorods As Localized Surface Plasmon Resonance Sensors, Akil Mannan Matcheswala

University of Kentucky Master's Theses

A novel localized surface plasmon resonance (LSPR) sensor that differentiates between background refractive index changes and surface-binding of a target analyte (e.g. a target molecule, protein, or bacterium) is presented. Standard, single channel LSPR sensors cannot differentiate these two effects as their design allows only one mode to be coupled. This novel technique uses two surface plasmon modes to simultaneously measure surface binding and solution refractive index changes. This increases the sensitivity of the sensor.

Different channels or modes can be created in sensors with the introduction of gold nanospheres or gold nanorods that act as receptor mechanisms. Once ...


Detection Of Roof Boundaries Using Lidar Data And Aerial Photography, Andrew David Gombos 2010 University of Kentucky

Detection Of Roof Boundaries Using Lidar Data And Aerial Photography, Andrew David Gombos

University of Kentucky Master's Theses

The recent growth in inexpensive laser scanning sensors has created entire fields of research aimed at processing this data. One application is determining the polygonal boundaries of roofs, as seen from an overhead view. The resulting building outlines have many commercial as well as military applications. My work in this area has created a segmentation algorithm where the descriptive features are computationally and theoretically simpler than previous methods. A support vector machine is used to segment data points using these features, and their use is not common for roof detection to date. Despite the simplicity of the feature calculations, the ...


Non-Destructiveapproachto Ellipsometric Monitoring Of A Film Coating On The Inner Surface Of A Tube Shaped Sample, Gregory K. Prilbil, John A. Woollam, Martin M. Liphardt, James D. Welch 2010 Lincoln, Ne

Non-Destructiveapproachto Ellipsometric Monitoring Of A Film Coating On The Inner Surface Of A Tube Shaped Sample, Gregory K. Prilbil, John A. Woollam, Martin M. Liphardt, James D. Welch

Faculty Publications from the Department of Electrical and Computer Engineering

Disclosed is the use of a focused electromagnetic beam which is caused to impinge on the top surface of a tube shaped sample, to investigate a film coating on inner surface during fabrication thereof and/or thereafter.


Testing Program For Kysat‐1, Jason Robert Bratcher 2010 University of Kentucky

Testing Program For Kysat‐1, Jason Robert Bratcher

University of Kentucky Master's Theses

Years of success in the aerospace industry has taught Kentucky Space several lessons. This thesis will summarize the accomplishments in an attempt to formulate a well-defined program for designing and testing small spacecraft in an environment with strict financial restraints. The motivation for producing this well-defined platform for testing small spacecraft arose when Kentucky Space became the liaison between NASA and its customers for the NanoRacks and CubeLab module program. Having a solid program for testing small spacecraft will allow future student programs to easily set standards for experiment payloads. Also by discussing obstacles for smaller programs such as restraints ...


Analysis And Optimization Of Electrical Systems In A Solar Car With Applications To Gato Del Sol Iii-Iv, Krishna Venkatesh Prayaga 2010 University of Kentucky

Analysis And Optimization Of Electrical Systems In A Solar Car With Applications To Gato Del Sol Iii-Iv, Krishna Venkatesh Prayaga

University of Kentucky Master's Theses

Gato del Sol III, was powered by a solar array of 480 Silicon mono-crystalline photovoltaic cells. Maximum Power Point trackers efficiently made use of these cells and tracked the optimal load. The cells were mounted on a fiber glass and foam core composite shell. The shell rides on a lightweight aluminum space frame chassis, which is powered by a 95% efficient brushless DC motor. Gato del Sol IV was the University of Kentucky Solar Car Team’s (UKSCT) entry into the American Solar Car Challenge (ASC) 2010 event. The car makes use of 310 high density lithium-polymer batteries to account ...


Statistical Models For Constant False-Alarm Rate Threshold Estimation In Sound Source Detection Systems, Sayed Mahdi Saghaian Nejad Esfahani 2010 University of Kentucky

Statistical Models For Constant False-Alarm Rate Threshold Estimation In Sound Source Detection Systems, Sayed Mahdi Saghaian Nejad Esfahani

University of Kentucky Master's Theses

Constant False Alarm Rate (CFAR) Processors are important for applications where thousands of detection tests are made per second, such as in radar. This thesis introduces a new method for CFAR threshold estimation that is particularly applicable to sound source detection with distributed microphone systems. The novel CFAR Processor exploits the near symmetry about 0 for the acoustic pixel values created by steered-response coherent power in conjunction with a partial whitening preprocessor to estimate thresholds for positive values, which represent potential targets.

To remove the low frequency components responsible for degrading CFAR performance, fixed and adaptive high-pass filters are applied ...


Theoretical Modeling And Analysis Of Ammonia Gas Sensing Properties Of Vertically Aligned Multiwalled Carbon Nanotube Resistive Sensors And Enhancing Their Sensitivity, Shripriya Darshini Poduri 2010 University of Kentucky

Theoretical Modeling And Analysis Of Ammonia Gas Sensing Properties Of Vertically Aligned Multiwalled Carbon Nanotube Resistive Sensors And Enhancing Their Sensitivity, Shripriya Darshini Poduri

University of Kentucky Master's Theses

Vertically aligned Multiwalled Carbon Nanotubes (MWCNTs) were grown in the pores of Anodized Aluminum Oxide (AAO) templates and investigated for resistive sensor applications. High Sensitivity of 23% to low concentration (100 ppm) of ammonia was observed. An equivalent circuit model was developed to understand the current flow path in the resistive sensor. This helped us in achieving high sensitivities through amorphous carbon (a-C) layer thickness tailoring by employing post-growth processing techniques like plasma etching.

A simulation model in MATLAB was developed to calculate the device resistance and the change in the sensitivity as a function of device parameters. The steady ...


Correlating The Magnitude And Spatial Gradient Of Alternans, Stuart Traxel 2010 University of Kentucky

Correlating The Magnitude And Spatial Gradient Of Alternans, Stuart Traxel

University of Kentucky Master's Theses

Electrical restitution has been shown to inaccurately predict the occurrence of alternans of action potential duration. A new method using the spatial gradient of alternans (SGA) is proposed to predict alternans and cardiac electrical stability. A simulated 1-D strand of tissue was used to compare indexes computed from restitution methods and the SGA method to changes in the amplitude of alternans using different electro-physiological alterations. The SGA method correlated better with changes in the amplitude of alternans than restitution methods for a decrease in the transient outward current (Ito) and conduction velocity. Restitution methods correlated better with changes in ...


Decision Analysis Tool For Appropriate Water Treatment Technologies In Improverished Villages, Conner David Johnston 2010 California Polytechnic State University - San Luis Obispo

Decision Analysis Tool For Appropriate Water Treatment Technologies In Improverished Villages, Conner David Johnston

Industrial and Manufacturing Engineering

No abstract provided.


Digester Selection And Operation For Heybeli Island, Spencer Fackler, Joseph Violetti 2010 California Polytechnic State University - San Luis Obispo

Digester Selection And Operation For Heybeli Island, Spencer Fackler, Joseph Violetti

Industrial and Manufacturing Engineering

The Heybeli Digester project originated with Sema Alptekin in her personal research and was incorporated into a Senior Project opportunity at California Polytechnic State University, San Luis Obispo. The aim of this project was to select and design a plan for the use of a digester for the island of Heybeli, Turkey. The objective of this plan was to incorporate economic, social, and environmental justifications to evaluate if a digester would be a benefit to the community.

Systems Engineering analysis is a vital tool when working with complicated projects that include multiple systems interfacing with one another. Through the use ...


Parameter Estimation In Heat Transfer And Elasticity Using Trained Pod-Rbf Network Inverse Methods, Craig Rogers 2010 University of Central Florida

Parameter Estimation In Heat Transfer And Elasticity Using Trained Pod-Rbf Network Inverse Methods, Craig Rogers

Electronic Theses and Dissertations, 2004-2019

In applied mechanics it is always necessary to understand the fundamental properties of a system in order to generate an accurate numerical model or to predict future operating conditions. These fundamental properties include, but are not limited to, the material parameters of a specimen, the boundary conditions inside of a system, or essential dimensional characteristics that define the system or body. However in certain instances there may be little to no knowledge about the systems conditions or properties; as a result the problem cannot be modeled accurately using standard numerical methods. Consequently, it is critical to define an approach that ...


Markerless Tracking Using Polar Correlation Of Camera Optical Flow, Prince Gupta 2010 University of Central Florida

Markerless Tracking Using Polar Correlation Of Camera Optical Flow, Prince Gupta

Electronic Theses and Dissertations, 2004-2019

We present a novel, real-time, markerless vision-based tracking system, employing a rigid orthogonal configuration of two pairs of opposing cameras. Our system uses optical flow over sparse features to overcome the limitation of vision-based systems that require markers or a pre-loaded model of the physical environment. We show how opposing cameras enable cancellation of common components of optical flow leading to an efficient tracking algorithm that captures five degrees of freedom including direction of translation and angular velocity. Experiments comparing our device with an electromagnetic tracker show that its average tracking accuracy is 80% over 185 frames, and it is ...


Establishing Degradation Rates And Service Lifetime Of Photovoltaic Systems, Albert Leyte-Vidal 2010 University of Central Florida

Establishing Degradation Rates And Service Lifetime Of Photovoltaic Systems, Albert Leyte-Vidal

Electronic Theses and Dissertations, 2004-2019

As fossil fuel sources continue to diminish, oil prices continue to increase, and global warming and CO2 emissions keep impacting the environment, it has been necessary to shift energy consumption and generation to a different path. Solar energy has proven to be one of the most promising sources of renewable energy because it is environmentally friendly, available anywhere in the world, and cost competitive. For photovoltaic (PV) system engineers, designing a PV system is not an easy task. Research demonstrates that different PV technologies behave differently under certain conditions; therefore energy production varies not only with capacity of the system ...


Class-E Cascode Power Amplifier Analysis And Design For Long Term Reliability, Karan Kutty 2010 University of Central Florida

Class-E Cascode Power Amplifier Analysis And Design For Long Term Reliability, Karan Kutty

Electronic Theses and Dissertations, 2004-2019

This study investigated the Class-E power amplifier operating at 5.2 GHz. Since the operation of this amplifier applies a lot of stress on the switching transistor, a cascode topology was applied in order to reduce the drain-source voltage stress. Such an amplifier was designed and optimized in order to improve stability, power added efficiency, and matching. A layout for the said design was then created to be fabrication-ready using the TSMC 0.18 um technology. Post-layout simulations were performed in order to realize a more realistic circuit performance with the layout design in mind. Long-term stress effects, such as ...


A Methodology To Stabilize The Supply Chain, Alfonso Sarmiento 2010 University of Central Florida

A Methodology To Stabilize The Supply Chain, Alfonso Sarmiento

Electronic Theses and Dissertations, 2004-2019

In today's world, supply chains are facing market dynamics dominated by strong global competition, high labor costs, shorter product life cycles, and environmental regulations. Supply chains have evolved to keep pace with the rapid growth in these business dynamics, becoming longer and more complex. As a result, supply chains are systems with a great number of network connections among their multiple components. The interactions of the network components with respect to each other and the environment cause these systems to behave in a highly nonlinear dynamic manner. Ripple effects that have a huge, negative impact on the behavior of ...


Probing The Nanoscale Interaction Forces And Elastic Properties Of Organic And Inorganic Materials Using Force-Distance (F-D) Spectroscopy, Abhilash Vincent 2010 University of Central Florida

Probing The Nanoscale Interaction Forces And Elastic Properties Of Organic And Inorganic Materials Using Force-Distance (F-D) Spectroscopy, Abhilash Vincent

Electronic Theses and Dissertations, 2004-2019

Due to their therapeutic applications such as radical scavenging, MRI contrast imaging, Photoluminescence imaging, drug delivery, etc., nanoparticles (NPs) have a significant importance in bio-nanotechnology. The reason that prevents the utilizing NPs for drug delivery in medical field is mostly due to their biocompatibility issues (incompatibility can lead to toxicity and cell death). Changes in the surface conditions of NPs often lead to NP cytotoxicity. Investigating the role of NP surface properties (surface charges and surface chemistry) on their interactions with biomolecules (Cells, protein and DNA) could enhance the current understanding of NP cytotoxicity. Hence, it is highly beneficial to ...


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