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Clemson Catalog, 2008-2009, Volume 83, Clemson University Jan 2008

Clemson Catalog, 2008-2009, Volume 83, Clemson University

Clemson Catalog (undergraduate announcements)

No abstract provided.

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Globalization: Winners And Losers - Talking Points, Derek Wilmott Jan 2008

Globalization: Winners And Losers - Talking Points, Derek Wilmott

Publications

Supporters of free trade argue that globalization increases economic prosperity as well as opportunity, especially among developing nations. Critics argue that globalization has led to the exploitation of both workers and the environment, while contributing to the destabilization of undeveloped nations. Can free trade enhance civil liberties, lead more efficient allocation of resources, and increase prosperity through globalization? Or are the critics right?

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Clemson Commencement Program, December 2007, Clemson University Dec 2007

Clemson Commencement Program, December 2007, Clemson University

Clemson Commencement Programs

No abstract provided.

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Development Of The Impedance-Based Arc-Flash Determination Device (Iadd), Timothy Smith Dec 2007

Development Of The Impedance-Based Arc-Flash Determination Device (Iadd), Timothy Smith

All Theses

This thesis entitled, 'Development of the Impedance based Arc-Fault Determination Device (IADD)' details the development of a testing device that, when attached to an electrical node on the power system and through observations on voltage, current and phase shift with a step load change, determines the effective Thevenin or Norton impedance at the point of test. This thesis includes discussion of the theory and design process that enables the determination of an equivalent circuit, software development using National Instruments' LabView software development package and suggestions for future development.
The purpose of this thesis is to produce a device that can …

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Iron Sequestration In Lake Sediments From Artificial Hypolimnetic Oxygenation: Richard B. Russell Reservoir, Amanda Elrod Dec 2007

Iron Sequestration In Lake Sediments From Artificial Hypolimnetic Oxygenation: Richard B. Russell Reservoir, Amanda Elrod

All Theses

The Upper Savannah River watershed has numerous impoundments, and the three largest hydroelectric reservoirs, from north to south, are Hartwell, Richard B. Russell, and J. Strom Thurmond Lakes. During the summer months, these reservoirs undergo thermal and chemical stratification, which results in the formation of cool, hypoxic/anoxic hypolimnia and warm, oxic epilimnion. To maintain fisheries habitat, the United States Army Corps of Engineers operates a hypolimnetic oxygenation system in the forebay of Richard B. Russell Lake. The purpose of this system is to improve the water quality of the releases from Richard B. Russell Dam by maintaining a dissolved oxygen …

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Operational Strategies For Continuum Manipulators, Matt Csencsits Dec 2007

Operational Strategies For Continuum Manipulators, Matt Csencsits

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We introduce a novel, intuitive user interface for continuum manipulators through the use of various joystick mappings. This user interface allows for the effective use of continuum manipulators in the lab and in the field. A novel geometric approach is developed to produce a more intuitive understanding of continuum manipulator kinematics. Using this geometric approach we derive the first closed-form solution to the inverse kinematics problem for continuum robots. Using the derived inverse kinematics to convert from workspace coordinates to configuration space coordinates we develop a potential-field path planner for continuum manipulators.

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Radial Outflow In Teleoperation: A Possible Solution For Improving Depth Perception, Joshua Gomer Dec 2007

Radial Outflow In Teleoperation: A Possible Solution For Improving Depth Perception, Joshua Gomer

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Practical experience has shown that operators of remote robotic systems have difficulty perceiving aspects of remotely operated robots and their environments (e.g. Casper & Murphy, 2003). Operators often find it difficult, for example, to perceive accurately the distances and sizes of remote objects. Past research has demonstrated that employing a moveable camera that provides the operator optical motion allows for the perception of distance in the absence of other information about depth (Dash, 2004). In this experiment a camera was constrained to move only forward and backward, thus adding monocular radial outflow to the video stream. The ability of remote …

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Optical Force Based Cancer Cell Identification, Justin Roman Dec 2007

Optical Force Based Cancer Cell Identification, Justin Roman

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We present the basis of a novel, non-invasive technique for cell diagnostics which utilizes the optical force generated by a weakly focused laser beam to distinguish cells based on their size, structure, composition, and membrane properties. Cell populations of different types, biological states or with different treatments can be studied. This research focuses on two particular instances where other methods of cell sorting, such as those that require fluorescent markers, are not ideal. What's more, this research emphasizes the ability to sort morphologically similar cells that are identical to the naked eye, but phenotypically different on the molecular level. The …

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On The Stability Of Region Count In The Parameter Space Of Image Analysis Methods, Li Yu Dec 2007

On The Stability Of Region Count In The Parameter Space Of Image Analysis Methods, Li Yu

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In this dissertation a novel bottom-up computer vision approach is proposed. This approach is based upon quantifying the stability of the number of regions or count in a multi-dimensional parameter scale-space. The stability analysis comes from the properties of flat areas in the region count space generated through bottom-up algorithms of thresholding and region growing, hysteresis thresholding, variance-based region growing. The parameters used can be threshold, region growth, intensity statistics and other low-level parameters. The advantages and disadvantages of top-down, bottom-up and hybrid computational models are discussed. The approaches of scale-space, perceptual organization and clustering methods in computer vision are …

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A Middle-Ware Level Client Cache For A High Performance Computing I/O Simulator, Michael Bassily Dec 2007

A Middle-Ware Level Client Cache For A High Performance Computing I/O Simulator, Michael Bassily

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This thesis describes the design and run time analysis of the system level middle-ware cache for Hecios. Hecios is a high performance cluster I/O simulator. With Hecios, we provide a simulation environment that accurately captures the performance characteristics of all the components in a clusterwide parallel file system. Hecios was specifically modeled after PVFS2. It was designed to be extensible and to easily allow for various component modules to be easily replaced by those that model other system types. Built around the OMNeT++ simulation package, Hecios' inner-cluster communication module is easily adaptable to any TCP/IP based protocol and all standard …

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A Case Study On The Use Of Design Exemplar As A Search And Retrieval Tool, Narasimha Murty Srirangam Dec 2007

A Case Study On The Use Of Design Exemplar As A Search And Retrieval Tool, Narasimha Murty Srirangam

All Theses

This thesis presents a case study examining the suitability of design exemplar technology as a CAD query tool for an industrial scenario. The search and retrieval of geometrically similar mold inserts to save tooling cost for a tire manufacturing company is taken as the case study. During the implementation of the design exemplar as a CAD search and retrieval tool, several limitations of it are identified, such as the difficulty and tediousness in authoring exemplars for real world problems. To overcome these limitations, a new mathematical-based exemplar approach (mathematical model) is developed for tire mold insert retrieval. This approach calculates …

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Rendering Principal Direction Contour Lines With Oriented Textures, Kelly Gallagher Dec 2007

Rendering Principal Direction Contour Lines With Oriented Textures, Kelly Gallagher

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In this paper we explore the use of contour lines in computer graphics as a means of conveying shape to the end-user. Contour lines provide an alternative to traditional realistic rendering styles and may even provide a more appropriate visualization for certain situations. For our images, contour line orientation is established in accordance with principal curvature directions.
We present a method for rendering a texture, oriented in the principal curvature direction, across a traditionally-modeled geometric surface that effectively forms suggestive contour lines to enhance the visualization of that surface. We further extend the method to create animated contour textures, wherein …

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Evaluation Of Equalization Basins As Initial Treatment For Flue Gas Desulfurization Waters, Meg Iannacone Dec 2007

Evaluation Of Equalization Basins As Initial Treatment For Flue Gas Desulfurization Waters, Meg Iannacone

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Coal-fired power plants are introducing flue gas desulfurization (FGD) scrubbers to reduce sulfur dioxide and mercury emissions in order to meet air quality standards. FGD scrubber systems utilize a mixture of limestone, water, and organic acids to precipitate sulfur compounds. The resulting FGD water and associated particulates often contain constituents of concern including chlorides, inorganic elements (Hg, As, and Se), and sulfates that must be treated before discharge. Constructed wetland treatment systems, consisting of an equalization basin followed by wetland reactors, present a viable option to efficiently treat FGD waters. Equalization basins are designed to cool and homogenize FGD water …

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Least Squares Fitting Of Analytic Primitives On A Gpu, Meghashyam Panyam Mohan Ram Dec 2007

Least Squares Fitting Of Analytic Primitives On A Gpu, Meghashyam Panyam Mohan Ram

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Metrology systems take coordinate information directly from the surface of a manufactured part and generate millions of (X, Y, Z) data points. The inspection process often involves fitting analytic primitives such as sphere, cone, torus, cylinder and plane to these points which represent an object with the corresponding shape. Typically, a least squares fit of the parameters of the shape to the point set is performed. The least squares fit attempts to minimize the sum of the squares of the distances between the points and the primitive. The objective function however, cannot be solved in the closed form and numerical …

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Risk Characterization For Boron And Aquatic Plants And Animals, Basma Damiri Dec 2007

Risk Characterization For Boron And Aquatic Plants And Animals, Basma Damiri

All Theses

In aqueous mixtures, boron can be toxic to plants or animals at relatively low concentrations. Boron may occur at concentrations that can pose risk to plants used in constructed wetland treatment systems designed to treat constituents of concerned in a complex matrix such as flue gas desulfurization water and boron may adversely affect survival, growth, and consequently, plant performance. The three major objectives of this research are: 1) to measure responses of Typha latifolia (seed germination and root and shoot elongation) and Schoenoplectus californicus early seedlings (survival, and shoot and root elongation) to aqueous exposures of boron in diluted FGD …

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Effect Of Nitrogen Filling On Tire Rolling Resistance And Vehicle Fuel Economy, Prakash Venkataraman Dec 2007

Effect Of Nitrogen Filling On Tire Rolling Resistance And Vehicle Fuel Economy, Prakash Venkataraman

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There are various losses associated with passenger vehicle that affect its fuel economy as it is being operated. These losses include engine, driveline, aerodynamic and rolling losses. While engine, driveline and aerodynamic losses are inherent with the vehicle due to large number of parts that go into assembling, rolling loss is associated with the vehicle tires and it is the only part of the vehicle that comes in contact with the road. The rolling resistance of inflated tires is an important component of resistance to vehicle motion and contributes to vehicle fuel consumption. Many research works have been focused on …

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A Case Study Investigating Rule Based Design In An Industrial Setting, Siva Chavali Dec 2007

A Case Study Investigating Rule Based Design In An Industrial Setting, Siva Chavali

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This thesis presents a case study on the implementation of a rule based design (RBD) process for an engineer-to-order (ETO) company. The time taken for programming and challenges associated with this process are documented in order to understand the benefits and limitations of RBD. These times are obtained while developing RBD programs for grid assemblies of bottle packaging machines that are designed and manufactured by Hartness International (HI). In this project, commercially available computer-aided design (CAD) and RBD software are integrated to capture the design and manufacturing knowledge used to automate the grid design process of HI. The stages involved …

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Constructed Wetlands For The Landscape Nursery Industry: Nutrient Assimilation And Removal, Sarah White Dec 2007

Constructed Wetlands For The Landscape Nursery Industry: Nutrient Assimilation And Removal, Sarah White

All Dissertations

Runoff from nursery operations is considered a potential non-point source contamination. Water quality and quantity are quickly becoming important factors that drive management practices at these facilities. Constructed wetland systems (CWS) are a management tool that can be used by nursery operations to improve water quality both for recycling within nursery production areas and for eventual release from nursery production areas into surrounding surface waters. The overall goal of this research was to optimize nutrient removal efficiencies in CWS. To accomplish this goal, I characterized the following: (1) the P sorption and desorption capacity of several substrates; (2) the effect …

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Sediment Transport Upstream Of Orifices, David Powell Dec 2007

Sediment Transport Upstream Of Orifices, David Powell

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Sediment transport upstream of orifices has not been studied outside the realm of the restoration of reservoir storage capacity. This experimental study used a large basin with a circular orifice outlet and a movable sand bed leveled with the invert of the orifice. Three sizes of non-cohesive, uniform sand were used with d50 values of 0.29mm, 0.72mm, and 0.89mm. Bed profiles at equilibrium scour conditions were measured for three different head levels for each sediment size. The maximum scour depth, length, and scour width were related to the particle size and the available head. The longitudinal and lateral extents …

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Hybrid Image/Model Based Gaze-Contingent Rendering, Hunter Murphy Dec 2007

Hybrid Image/Model Based Gaze-Contingent Rendering, Hunter Murphy

All Dissertations

A non-isotropic hybrid image/model based gaze-contingent rendering technique utilizing ray casting on a GPU is discussed. Empirical evidence derived from human subject experiments indicates an inverse relationship between a peripherally degraded scene's high-resolution inset size and mean search time, a trend consistent with existing image-based and model-based techniques. In addition, the data suggest that maintaining a target's silhouette edges decreases search times when compared to targets with degraded edges. Benefits of the hybrid technique include simplicity of design and parallelizability, both conducive to GPU implementation.

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Development Of Fullerene Based Sturctures For Photovoltaic And Electronic Applications, Amit Palkar Dec 2007

Development Of Fullerene Based Sturctures For Photovoltaic And Electronic Applications, Amit Palkar

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Solar energy can be envisioned as a long term alternative to rapidly depleting fossil fuels. The energy from the sun can be harnessed by constructing donor-acceptor (D-A) type devices where the incident photon induces the transfer of an electron from the donor to the acceptor. If recombination is prevented, this electron can then be channeled through an external circuit, thus leading to the generation of photocurrent. Porphyrins, which are the naturally occurring pigments in photosynthesis, have been widely established as donors while fullerenes, such as C60 and C70 , due to their unique electron accepting properties, have been …

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Multi-Objective Generation Scheduling With Hybrid Energy Resources, Manas Trivedi Dec 2007

Multi-Objective Generation Scheduling With Hybrid Energy Resources, Manas Trivedi

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In economic dispatch (ED) of electric power generation, the committed generating units are scheduled to meet the load demand at minimum operating cost with satisfying all unit and system equality and inequality constraints. Generation of electricity from the fossil fuel releases several contaminants into the atmosphere. So the economic dispatch objective can no longer be considered alone due to the environmental concerns that arise from the emissions produced by fossil fueled electric power plants. This research is proposing the concept of environmental/economic generation scheduling with traditional and renewable energy sources. Environmental/economic dispatch (EED) is a multi-objective problem with conflicting objectives …

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Essays On Sports Economics, Octavian Vasilescu Dec 2007

Essays On Sports Economics, Octavian Vasilescu

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The common thread behind the three papers presented here is the use of sports data to test economics theories. The effect of wage inequality on team production is an important question in labor economics. Data from sports are well suited to study this problem, with more than ten published papers in the last decade.In the first paper we analyze the effect of wage inequality both on team performance and efficiency, using data from Major League Baseball and a stochastic frontier model with a translog production function. Most studies have examined the impact of inequality within a linear framework, and found …

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Fungal Conversion And Supercritical Carbon Dioxide Processing For Value-Added Canola Oil, Meidui Dong Dec 2007

Fungal Conversion And Supercritical Carbon Dioxide Processing For Value-Added Canola Oil, Meidui Dong

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There is a growing awareness of health benefits of polyunsaturated fatty acids (PUFAs) e.g. arachidonic acid (ARA, C20:4n6) and eicosapentaenoic acid (EPA, C20:5n3). In general, plant seed oil and animal fat do not contains long-chain PUFAs with more than eighteen carbons. This study investigated the feasibility for addition of ARA and EPA to canola oil through the fermentation of fungi, Mortierella alpina, using canola flake, cake or meal as substrates. Supercritical CO2 extraction was also investigated for lipid extraction. In addition, a supercritical CO2 explosion process was characterized and applied to enhance oil extraction using supercritical CO2 and to potentially …

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Thermodynaimic Study Of Nucleic Acids Recognition By Aminoglycosides , Hongjuan Xi Dec 2007

Thermodynaimic Study Of Nucleic Acids Recognition By Aminoglycosides , Hongjuan Xi

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ABSTRACT


Since the origin of first aminoglycosides antibiotics, streptomycin, isolated by Selman Waksman about 60 years ago, a number of aminoglycosides antibiotics were discovered to treat different infections. Neomycin class aminoglycosides were found to originally target the A site 16S rRNA in the 30S subunit of the ribosome within the Gram-negative bacteria. In addition to its antibacterial effect, aminoglycosides were also found to binding to various other viral RNA structures such as TAR and RRE of HIV, Group I introns and hammerhead ribozyme, implying its potential to be used as antiviral reagent.

Furthermore, previous studies in our laboratory discovered a …

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Investigation Of Structure And Properties Of Novel Multi-Layer Clay Nanocomposite Films Produced Controllably By Continuous Chaotic Advection Blending, Chaitra Mahesha Dec 2007

Investigation Of Structure And Properties Of Novel Multi-Layer Clay Nanocomposite Films Produced Controllably By Continuous Chaotic Advection Blending, Chaitra Mahesha

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Polymer nanoclay composites have been studied extensively in the past decade due to the excellent combination of properties they can offer at low loadings of clay. Despite robust research, the potential enhancements that nanoclays are theoretically predicted to offer have not been achieved. Such potential improvements in mechanical and gas barrier properties are realized only when the internal structure of the nanocomposite is optimized in terms of arrangement and orientation of nanoclay within the matrix. The mixing-based approach and the accompanying complex flow fields of conventional processing techniques widely used to produce nanoclay composites are unable to control the internal …

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A Comparative Fault Diagnosis Methodology Based On Time Series Analysis Of System's Signals, Hany Bassily Dec 2007

A Comparative Fault Diagnosis Methodology Based On Time Series Analysis Of System's Signals, Hany Bassily

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The detection of system anomalies represents an important task in safety critical systems. Over the past two decades, advances in data manipulation techniques and sensor technology have contributed to the widespread application of signal processing concepts for fault diagnosis. However, the majority of these signal processing, or data driven, diagnostics do not possess the redundancy level exhibited in conventional model-based methods. Among signal processing methods, time series analysis is advantageous since it offers insight into the underlying dynamics and forecasts system behavior. Furthermore, the data driven method allows the depiction of system dynamics with an increased level of redundancy. This …

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Techniques For Improving The Performance Of Coupled Oscillator Arrays, Venkatesh Seetharam Dec 2007

Techniques For Improving The Performance Of Coupled Oscillator Arrays, Venkatesh Seetharam

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Coupled oscillator arrays (COAs) have excellent synchronization properties that can be utilized to develop a low cost alternative to phased array systems for beam steering applications. The primary concerns in implementing the COA architecture are the sensitivity to cell-to-cell component variation and poor phase noise performance. Wide injection locking range oscillators reduce the sensitivity to component variation but degrade the array phase noise performance. The objective of this dissertation is to alleviate the concerns hindering the application of COAs by employing techniques to realize COAs with wide mutual injection locking ranges (MILR), improved phase noise characteristics and beam steering capabilities. …

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Lithium-Conducting Ionic Melt Electrolytes From Oligomeric Ethylene Glycols: Synthesis And Characterization, Boutros Hallac Dec 2007

Lithium-Conducting Ionic Melt Electrolytes From Oligomeric Ethylene Glycols: Synthesis And Characterization, Boutros Hallac

All Dissertations

Commercial lithium ion cells consist of electrolytes that undergo salt concentration polarization which is acute upon high discharge currents. This type of polarization occurs as a result of the mobility of more than one ionic species in the presence of an electric field. One way to overcome it is by employing a material that would allow the mobility of one ionic species. This thesis will describe the synthesis and characterization of several fluorosulfonimide and fluorosulfonate based ionic liquids/melts as electrolytes having lithium as the only mobile ion. These materials were prepared by the nucleophilic addition reaction of a deprotonated polyether …

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Embedded Strategies In Mathematics Vocabulary Instruction: A Quasi-Experimental Study, Sharon Sanders Dec 2007

Embedded Strategies In Mathematics Vocabulary Instruction: A Quasi-Experimental Study, Sharon Sanders

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Recent accountability requirements increase the emphasis on mathematics achievement for all students, including low-performing students and students with learning disabilities. However, these students progress very slowly, with weaknesses evident in computation and problem solving. These limitations affect their success in mathematics at lower grades and make earning a high school diploma difficult. It is imperative to isolate components of mathematics comprehension and identify methods to teach them in order to help these lower performing students be successful. Research indicates a strong relationship between vocabulary and mathematical comprehension, identifying vocabulary understanding as a key component in understanding the subject. Vocabulary instruction …

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