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Robust Modeling Framework For Transportation Infrastructure System Protection Under Uncertainty, Jie Lu Dec 2015

Robust Modeling Framework For Transportation Infrastructure System Protection Under Uncertainty, Jie Lu

All Dissertations

This dissertation presents a modelling framework that will be useful for decision makers at federal and state levels to establish efficient resource allocation schemes to transportation infrastructures on both strategic and tactical levels. In particular, at the upper level, the highway road network carries traffic flows that rely on the performance of individual bridge infrastructure which is optimized through robust design at lower level. A system optimization model is developed to allocate resources to infrastructure systems considering traffic impact, which aims to reduce infrastructure rehabilitation cost, long term economic cost including travel delays due to realization of future natural disasters …

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Production And Characterization Of Cut Resistant Acrylic/Copolyaramid Fibers Via Bicomponent Wet Spinning, Stephen Hipp Dec 2015

Production And Characterization Of Cut Resistant Acrylic/Copolyaramid Fibers Via Bicomponent Wet Spinning, Stephen Hipp

All Dissertations

A composite fiber system consisting of a sheath core bicomponent polymer fiber loaded with hard ceramic particles was developed and characterized for use in cut protective clothing. The core component was comprised of a copolyaramid in order to provide high base cut resistance. An acrylic-copolyaramid polymer blend was used for the sheath component to improve processability and provide potential benefits such as dyeability. Lastly, aluminum oxide particles were incorporated into the fiber core to deflect and deform the cutting edge, further improving cut resistance. A series of designed experiments was used to explore the effects of the wet spinning and …

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High Temperature Synthesis And Characterization Of Reduced Polyoxometalate Salt-Inclusion Solids, Dino Sulejmanovic Dec 2015

High Temperature Synthesis And Characterization Of Reduced Polyoxometalate Salt-Inclusion Solids, Dino Sulejmanovic

All Dissertations

Herein, several new salt-inclusion solids (SISs) featuring electronically reduced Keggin polyoxometalate (POM) clusters were isolated for the first time using molten-salt high temperature (> 500 oC) synthetic method. These POM-based SISs are novel all-inorganic materials featuring an integrated lattice of ionic halide salt and covalent metal oxide clusters. Due to the weak interactions at the interface between these two chemically dissimilar lattices, these POM SISs are soluble in aqueous and polar solvents. While POM compounds are well-studied and are routinely synthesized in solution, the synthetic method presented in this dissertation yielded several POM solids with interesting structures and infrequently observed, …

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Scalable Synthesis And Energy Applications Of Defect Engineered Nano Materials, Mehmet Karakaya Dec 2015

Scalable Synthesis And Energy Applications Of Defect Engineered Nano Materials, Mehmet Karakaya

All Dissertations

Nanomaterials and nanotechnologies have attracted a great deal of attention in a few decades due to their novel physical properties such as, high aspect ratio, surface morphology, impurities, etc. which lead to unique chemical, optical and electronic properties. The awareness of importance of nanomaterials has motivated researchers to develop nanomaterial growth techniques to further control nanostructures properties such as, size, surface morphology, etc. that may alter their fundamental behavior. Carbon nanotubes (CNTs) are one of the most promising materials with their rigidity, strength, elasticity and electric conductivity for future applications. Despite their excellent properties explored by the abundant research works, …

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Understanding How Synthetic Organic Chemistry Graduate Students Navigate Scifinder, Lindsey Whitfield Cain Dec 2015

Understanding How Synthetic Organic Chemistry Graduate Students Navigate Scifinder, Lindsey Whitfield Cain

All Dissertations

Students pursuing a Ph.D. degree are expected to contribute research to their field, for which the success depends, in part, on their ability to find, interpret, and use scholarly information from the primary literature. However, studies from the information sciences show that graduate students from a variety of fields, including the sciences, frequently struggle to comprehensively search their respective dissertation topics because of insufficient prior content knowledge and lack of guidance from their disciplinary community. This body of literature is consistent with the results of my previous research of chemistry graduate students’ laboratory decision-making processes. Specifically, that study showed their …

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Development And Implementation Of Hay Yield Monitoring Technology, Henry Ramsey Dec 2015

Development And Implementation Of Hay Yield Monitoring Technology, Henry Ramsey

All Theses

Three independent technologies related to hay yield monitoring were developed and studied. One technology involved comparison of infrared and ultrasonic sensors on a self-propelled forage harvester. Sensor response related to grass height and was used to estimate yield. Plots that were harvested ranged from 20-40 ft. in length while a bin mounted on the back of the mower collected the crop for weighing and sampling. The infrared sensors data demonstrated accuracies across plots between 5.9% and 9.5% error. The infrared sensors quickly deteriorated and eventually proved to be useless for data acquisition. As for the ultrasonic sensors, they demonstrated similar …

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Design Of A Meta-Material With Targeted Nonlinear Deformation Response, Zachary Satterfield Dec 2015

Design Of A Meta-Material With Targeted Nonlinear Deformation Response, Zachary Satterfield

All Theses

The M1 Abrams tank contains track pads consist of a high density rubber. This rubber fails prematurely due to heat buildup caused by the hysteretic nature of elastomers. It is therefore desired to replace this elastomer by a meta-material that has equivalent nonlinear deformation characteristics without this primary failure mode. A meta-material is an artificial material in the form of a periodic structure that exhibits behavior that differs from its constitutive material. After a thorough literature review, topology optimization was found as the only method used to design meta-materials. Further investigation determined topology optimization as an infeasible method to design …

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Co-Design Of Dynamic Real-Time Scheduling And Cooperative Control For Human-Agent Collaboration Systems Based On Mutual Trust, Xiaotian Wang Dec 2015

Co-Design Of Dynamic Real-Time Scheduling And Cooperative Control For Human-Agent Collaboration Systems Based On Mutual Trust, Xiaotian Wang

All Theses

Mutual trust is a key factor in human-human collaboration. Inspired by this social interaction, we analyze human-agent mutual trust in the collaboration of one human and (semi)autonomous multi-agent systems. In the thesis, we derive time-series human-agent mutual trust models based on results from human factors engineering. To avoid both over- trust and under-trust, we set up dynamic timing models for the multi-agent scheduling problem and develop necessary and sufficient conditions to test the schedulability of the human multi-agent collaborative task. Furthermore, we extend the collaboration between one human and multiple agents into the collaboration between multi-human network and swarm-based agents …

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Virtual Humans And Photorealism: The Effect Of Photorealism Of Interactive Virtual Humans In Clinical Virtual Environment On Affective Responses, Himanshu Chaturvedi Dec 2015

Virtual Humans And Photorealism: The Effect Of Photorealism Of Interactive Virtual Humans In Clinical Virtual Environment On Affective Responses, Himanshu Chaturvedi

All Theses

The ability of realistic vs stylized representations of virtual characters to elicit emotions in users has been an open question for researchers and artists alike. We designed and performed a between subjects experiment using a medical virtual reality simulation to study the differences in the emotions aroused in participants while interacting with realistic and stylized virtual characters. The experiment included three conditions each of which presented a different representation of the virtual character namely; photo-realistic, non-photorealistic cartoon-shaded and non-photorealistic charcoal-sketch. The simulation used for the experiment, called the Rapid Response Training System was developed to train nurses to identify symptoms …

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Feasibility Study Of Porous Media Compressed Air Energy Storage In South Carolina, United States Of America, Alexandra-Selene Jarvis Dec 2015

Feasibility Study Of Porous Media Compressed Air Energy Storage In South Carolina, United States Of America, Alexandra-Selene Jarvis

All Theses

Renewable Energy Systems (RES) such as solar and wind, are expected to play a progressively significant role in electricity production as the world begins to move away from an almost total reliance on nonrenewable sources of power. In the US there is increasing investment in RES as the Department of Energy (DOE) expands its wind power network to encompass the use of offshore wind resources in places such as the South Carolina (SC) Atlantic Coastal Plain. Because of their unstable nature, RES cannot be used as reliable grid-scale power sources unless power is somehow stored during excess production and recovered …

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Control Of Thermoforming Process Parameters To Manufacture Surfaces With Pin-Based Tooling, Vijay Sarthy Mysore Sreedhara Dec 2015

Control Of Thermoforming Process Parameters To Manufacture Surfaces With Pin-Based Tooling, Vijay Sarthy Mysore Sreedhara

All Theses

Many manufacturing processes used to mass produce parts rely on expensive and time consuming tooling. These processes include sheet metal forming, injection molding, casting, and thermoforming. The time invested in design and development of tooling can be justified for high-production volumes. However, for low-volume production and customized products, the tooling investment cannot be amortized. Flexible tooling has been developed to address the needs of smaller production volumes. Reconfigurable pin tooling is an example of flexible tooling that relies on a matrix of adjustable-height pins to produce approximate surfaces. A key challenge in pin-based tooling is achieving accurate high quality surfaces …

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Multiplier Operator On Framed Hilbert Spaces, Haodong Li Dec 2015

Multiplier Operator On Framed Hilbert Spaces, Haodong Li

All Theses

Very often the operators that we study appear most naturally in highly non-diagonal representation. The main goal of spectral theory is to solve this problem by exhibiting for many operators a natural orthonormal basis with respect to which the operators have diagonal representations. However, this can be done only for certain classes of operators. The most important such class is probably the class of compact operators. The problem is that it is often hard to tell whether an operator is compact looking at its non-diagonal representation. In this thesis, we will study a class of operators for which we can …

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The Factors Determining The Quantity Of Taxies - An Empirical Analysis Of Cities In China, Yunzi Zhu Dec 2015

The Factors Determining The Quantity Of Taxies - An Empirical Analysis Of Cities In China, Yunzi Zhu

All Theses

The inefficient allocation of transport capacity in the taxi industry leads to the imbalance between the demand and supply of taxies. This paper tries to investigate the influencing factors on the quantity of taxies from the perspective of the demand. It is based on the empirical analysis and assumes that the quantity of buses (Bus), average wage per citizens (AW), population density (PD), road density (RD), the availability of subways (SW) and the e-hailing application (EH) co-determine the quantity of taxies. Under the assumption, I collected the data in 287 cities from 2010 to 2013 and put them into the …

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Uptake Of Plutonium On A Novel Thin Film For Use In Spectrometry, William Locklair Dec 2015

Uptake Of Plutonium On A Novel Thin Film For Use In Spectrometry, William Locklair

All Theses

Trace elemental and isotopic analysis of actinides via Thermal Ionization Mass Spectrometry (TIMS) is often difficult and time consuming due to intensive sample preparation. Polymer thin films show strong potential for rapid concentration of radionuclides from solution that may prove as suitable substrates for TIMS analyses. In this work, a polymer thin film (~180 nm) was coated onto a silicon substrate and utilized for rapid radioanalytical analysis. The polymer is composed of poly(vinyl benzyl chloride) functionalized with triethyl amine (TEA) to produce an anion-exchange site for concentrating anionic actinide complexes (i.e. PuCl62-, Pu(NO3)62-) from solution. In addition, selectively functionalizing “spots” …

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Phasor Measurement Unit Deployment Approach For Maximum Observability Considering Vulnerability Analysis, Jyoti Paudel Dec 2015

Phasor Measurement Unit Deployment Approach For Maximum Observability Considering Vulnerability Analysis, Jyoti Paudel

All Theses

In recent years, there has been growing interest of synchrophasor measurements like Phasor Measurement Units (PMUs) Power systems are now being gradually populated by PMU since they provide significant phasor information for the protection and control of power systems during normal and abnormal situations. There are several applications of PMUs, out of which state estimation is a widely used. To improve the robustness of state estimation, different approaches for placement of PMUs have been studied. This thesis introduces an approach for deployment the PMUs considering its vulnerability. Two different analysis have been considered to solve the problem of locating PMUs …

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Capillary-Channeled Polymer Fibers As Stationary Phases For Protein Chromatography, Marissa Pierson Dec 2015

Capillary-Channeled Polymer Fibers As Stationary Phases For Protein Chromatography, Marissa Pierson

All Theses

Capillary-channeled polymer (C-CP) fibers have been studied in this laboratory as stationary phases for protein separations in high-performance liquid chromatography (HPLC). C-CP fibers are uniquely shaped so as to include eight continuous capillary-channels which interdigitate once packed into a column. The packed column resembles a monolithic structure of unobstructed flow through capillary channels which reduces backpressure and increases linear velocity, reducing separation time. Fibers are effectively nonporous with respect to macromolecules, resulting in fast mass transfer and high sample recovery. C-CP fibers made from polypropylene (PP) yield a fairly homogenous hydrophobic surface suitable for reversed phase (RP) chromatography. In a …

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Comparative Aquatic Toxicity Of A Commercial Naphthenic Acid And Processes For Mitigating Risks, Ciera Kinley Dec 2015

Comparative Aquatic Toxicity Of A Commercial Naphthenic Acid And Processes For Mitigating Risks, Ciera Kinley

All Theses

Comparative toxicity data can inform predictions of relative risk, and can be used to implement strategies for altering exposures to mitigate risk. Naphthenic acids (NAs) are a complex group of carboxylic acids that naturally occur in petroleum sources and energy-derived process waters (e.g. refinery effluents and oil sands process affected waters). These compounds are relatively persistent in water and can be a source of toxicity to aquatic organisms. In the first experiment of this thesis, responses of sentinel aquatic organisms to 7-d exposures of commercial (Fluka) NAs were measured (in terms of acute toxicity) to discern relative sensitivities. In terms …

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Painting With Turbulence, Chuqiao Wang Dec 2015

Painting With Turbulence, Chuqiao Wang

All Theses

Inspired by a study that identified a strong similarity between Vincent van Gogh's and Jackson Pollock's painting techniques, this thesis explores the interplay between science and art, specifically the unpredictable behaviors in turbulent flows and aesthetic concepts in painting. It utilizes data from a GPU-based air flow simulation, and presents a framework for artists to visualize the chaotic property changes in turbulent flows and create paintings with turbulence data. While the creation of individual brushstrokes is procedural and driven by simulation, artists are able to exercise their aesthetic judgments at various stages during a painting creation. A short animation demonstrates …

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Analysis And Synthesis Of Effective Human-Robot Interaction At Varying Levels In Control Hierarchy, David Spencer Dec 2015

Analysis And Synthesis Of Effective Human-Robot Interaction At Varying Levels In Control Hierarchy, David Spencer

All Theses

Robot controller design is usually hierarchical with both high-level task and motion planning and low-level control law design. In the presented works, we investigate methods for low-level and high-level control designs to guarantee joint performance of human-robot interaction (HRI). In the first work, a low-level method using the switched linear quadratic regulator (SLQR), an optimal control policy based on a quadratic cost function, is used. By incorporating measures of robot performance and human workload, it can be determined when to utilize the human operator in a method that improves overall task performance while reducing operator workload. This method is demonstrated …

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The Impact Of China's "West To East" Electricity Transmission Project On Energy Poverty, Xiaotian Chen Dec 2015

The Impact Of China's "West To East" Electricity Transmission Project On Energy Poverty, Xiaotian Chen

All Theses

Energy poverty, which means that people can't get enough energy for daily life, is one of the big problems in rural place of Northwest region of China. The government wants to solve the problem with a large-scale electricity transmission project named "West to East". The aim of this thesis is to evaluate the impact of "West to East" project on the reduction of energy poverty in Shaanxi province in China through the analysis of 119 counties between the years 2003 to 2015. Since residential electricity price are set by the government at artificially low levels, an alternative measure is constructed …

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Sons Of Dear Old Clemson: An Examination Of Clemson University's Most Influential Founding Fathers, Sally Mauldin Dec 2015

Sons Of Dear Old Clemson: An Examination Of Clemson University's Most Influential Founding Fathers, Sally Mauldin

All Theses

This thesis is designed to determine the roles played by three different men in the founding of the Clemson Agricultural College of South Carolina: Thomas Green Clemson, Richard Wright Simpson, and Benjamin Ryan Tillman. It examines primary sources generated by each man and attempts to reconstruct the events of the fall of 1886 through 1918 to validate the claims of Simpson and Tillman of their roles in realizing Clemson’s dream of founding an agricultural and mechanical college following Clemson’s death in 1888. Each played a vital role in the founding and establishment of Clemson College and derived much personal satisfaction …

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Experimental Investigation Of Interaction Between Proteins And Carbon Nanomaterials, Bishwambhar Sengupta Dec 2015

Experimental Investigation Of Interaction Between Proteins And Carbon Nanomaterials, Bishwambhar Sengupta

All Theses

The global market for nanomaterials based products is forecasted to reach $1 trillion per annum per annum for 2015. Engineered nanomaterials (ENMs) exhibit unique physicochemical properties with potential to impact diverse aspects of society through applications in electronics, renewable energy, and medicine. While the research and proposed applications of ENMs continue to grow rapidly, the health and safety of ENMs still remains a major concern to the public as well as to policy makers and funding agencies. It is now widely accepted that focused efforts are needed for identifying the list of physicochemical descriptors of ENM before they can be …

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Condition Assessment Of Clemson University's Parking Network And Development Of A Framework To Support Pavement Management, Yazurved Sai Vishwaksen Aravalli Dec 2015

Condition Assessment Of Clemson University's Parking Network And Development Of A Framework To Support Pavement Management, Yazurved Sai Vishwaksen Aravalli

All Theses

The concept of pavement management system for Clemson University parking network provides a rehabilitation programming strategy for parking and transportation services department at Clemson University. The department invests funds to keep parking lots in good condition which pays large rewards in terms of savings for both Clemson University and parking lot users. Clemson University Pavement Management System (CU-PMS) will provide quality information for better decisions to ensure the funds invested gets the best value. This project consists of developing a useful and efficient network-level PMS for Clemson University parking lot network. The study area includes all the parking lots in …

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Power Quality Study Of A Microgrid With Nonlinear Composite Load And Pv Integration, Zhanhe Liu Dec 2015

Power Quality Study Of A Microgrid With Nonlinear Composite Load And Pv Integration, Zhanhe Liu

All Theses

Harmonics distortion is a crucial problem in microgrid. Harmonic sources can be categorized as two main factors: renewable energy integration and nonlinear loads. Both factors are investigated in this thesis. For renewbale energy, photovoltaic (PV) power is one of the most effective solutions for energy crisis and it is showing great potential for serving customers in microgrid. A three phase PV source model is established from both mathematical equations and power electronic control schemes. A composite load model by Crossed Frequency Admittance Matrix theory is illustrated and built as well. Due to the fact that microgrid should be able to …

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Battery Energy Storage System: A Financial Analysis For Microgrids, Nikitas Zagoras Dec 2015

Battery Energy Storage System: A Financial Analysis For Microgrids, Nikitas Zagoras

All Theses

Renewable Energy Sources are becoming more popular mostly due to their reduced carbon footprint. One major issue that keeps them from becoming more popular is their output variability. Energy Storage Systems have been gaining a lot of “traction” into the power grid since they can address that variability and make RES more controllable. In this thesis, various Energy Storage Systems are introduced, while Battery Energy Storage Systems and their various technologies are studied in more detail. BESS are commonly used in supporting Photovoltaic Power Plants, as they provide the convenience of a shared DC bus. This thesis also includes an …

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Development Of A Suturing Simulation Device For Synchronous Acqusition Of Data, Tanmay Kavathekar Dec 2015

Development Of A Suturing Simulation Device For Synchronous Acqusition Of Data, Tanmay Kavathekar

All Theses

There have been tremendous technological advancements in the field of surgery with new devices and minimally invasive techniques rapidly being developed. As a result, there is a corresponding need to train novice surgeons and residents to use these new technologies. Due to new regulations in medical education, an increasing the amount of surgical skills training is designed for outside the operation room using surgical simulators. In this work, a device called the suture platform was conceptualized for assessing and training basic suturing skills of medical students and novice surgeons. In the traditional approach of “open” surgery, which has not benefitted …

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Effects Of Nitrogen Fertilization On The Life History Of The Madeira Mealybug (Phenacoccus Madeirensis) And The Molecular Composition Of Its Host Plant, Stephanie Alliene Rhodes Dec 2015

Effects Of Nitrogen Fertilization On The Life History Of The Madeira Mealybug (Phenacoccus Madeirensis) And The Molecular Composition Of Its Host Plant, Stephanie Alliene Rhodes

All Theses

The aim of this study was to investigate how different nitrogen fertilization rates of host-plants influence the development, fecundity, and nutritional status of a pest insect,the Madeira mealybug (Phenococcus madeirensis Green, Hemiptera: Psuedococcidae).This study evaluated the effects of nitrogen fertilization (0, 75, 150 and 300 ppm N) onthe growth, % nitrogen, % carbon, lipid, and protein contents of basil plants (Ocimum basilicum L., Lamiaceae), and the subsequent impacts of host-plant nutritional status onthe life history and total lipid and protein contents of the Madeira mealybug. Heights androot lengths of plants fertilized with 75 ppm N were greater than those of …

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The Tiger Vol. 109 Issue 52 2015-11-30, Clemson University Nov 2015

The Tiger Vol. 109 Issue 52 2015-11-30, Clemson University

Tiger Newspapers 2015

No abstract provided.

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The Tiger Vol. 109 Issue 47 2015-11-05, Clemson University Nov 2015

The Tiger Vol. 109 Issue 47 2015-11-05, Clemson University

Tiger Newspapers 2015

No abstract provided.

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Collaborate To Innovate: Expanding Access To Faculty Patents Through The Institutional Repository And The Library Catalog, Andrew Wesolek, Jan Comfort, Lisa Bodenheimer Nov 2015

Collaborate To Innovate: Expanding Access To Faculty Patents Through The Institutional Repository And The Library Catalog, Andrew Wesolek, Jan Comfort, Lisa Bodenheimer

Publications

Institutional repositories and library catalogs have long been used to promote and provide access to scholarly articles, monographs, and other “traditional” forms of scholarship. However, faculty at many institutions participate in “non-traditional” forms of research, such as patents. This work explores the use of Clemson University’s institutional repository and library catalog in promoting and providing access to the patents granted to its inventors. More specifically, the authors outline the project from generating metadata for patents, and cross-walking it into a form that can be batch uploaded to a bepress Digital Commons Repository. They then explore the process of harvesting the …

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