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Advancements In Finite Element Methods For Newtonian And Non-Newtonian Flows, Keith Galvin Aug 2013

Advancements In Finite Element Methods For Newtonian And Non-Newtonian Flows, Keith Galvin

All Dissertations

This dissertation studies two important problems in the mathematics of computational fluid dynamics. The first problem concerns the accurate and efficient simulation of incompressible, viscous Newtonian flows, described by the Navier-Stokes equations. A direct numerical simulation of these types of flows is, in most cases, not computationally feasible. Hence, the first half of this work studies two separate types of models designed to more accurately and efficient simulate these flows. The second half focuses on the defective boundary problem for non-Newtonian flows. Non-Newtonian flows are generally governed by more complex modeling equations, and the lack of standard Dirichlet or Neumann …

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Hydrothermal Chemistry, Crystal Structures, And Spectroscopy Of Novel Fluorides And Borates, Christopher Underwood Aug 2013

Hydrothermal Chemistry, Crystal Structures, And Spectroscopy Of Novel Fluorides And Borates, Christopher Underwood

All Dissertations

This dissertation is a two-part manuscript highlighting the utilities of the hydrothermal method for exploring phase space, then extending that to the targeted growth of potentially useful materials. Chapters 3 - 5 discuss the synthesis of Group 4 fluorides and oxyfluorides. The study of this class of compounds in regards to their single crystal structures is a rich, but neglected area. Among the Group 4 metals, compounds based on Zr and Ti have been extensively studied, while those based on Th and Hf are sparsely reported and those based on Ce(IV) are nearly completely neglected. Using the hydrothermal method, many …

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Mathematical Optimization For Engineering Design Problems, Brian Dandurand Aug 2013

Mathematical Optimization For Engineering Design Problems, Brian Dandurand

All Dissertations

Applications in engineering design and the material sciences motivate the development of optimization theory in a manner that additionally draws from other branches of mathematics including the functional, complex, and numerical analyses.
The first contribution, motivated by an automotive design application, extends multiobjective optimization theory under the assumption that the problem information is not available in its entirety to a single decision maker as traditionally assumed in the multiobjective optimization literature. Rather, the problem information and the design control are distributed among different decision makers. This requirement appears in the design of an automotive system whose subsystem components themselves correspond …

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Gesture-Based Robot Path Shaping, Paul Yanik Aug 2013

Gesture-Based Robot Path Shaping, Paul Yanik

All Dissertations

For many individuals, aging is frequently associated with diminished mobility and dexterity. Such decreases may be accompanied by a loss of independence, increased burden to caregivers, or institutionalization. It is foreseen that the ability to retain independence and quality of life as one ages will increasingly depend on environmental sensing and robotics which facilitate aging in place. The development of ubiquitous sensing strategies in the home underpins the promise of adaptive services, assistive robotics, and architectural design which would support a person's ability to live independently as they age. Instrumentation (sensors and processing) which is capable of recognizing the actions …

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Robust Design Optimization: Ensuring Robustness Against Uncertainty In Structural Design, Zhifeng Liu Aug 2013

Robust Design Optimization: Ensuring Robustness Against Uncertainty In Structural Design, Zhifeng Liu

All Dissertations

In structural design, if robustness is overlooked in design process, the acquired design is likely to have large variation in its performance due to uncertainties. In that there is no design specification that explicitly considers the robustness against such uncertainties, this dissertation elucidates design methodologies for use in selecting the optimal design parameters to minimize the effect of the hard to reduce or irreducible uncertainties on structural performance, i.e., maximizing the robustness. However, due to limited resources, structural designs are also constrained by available resources and budget. Consequently, in that a tradeoff relationship exists between the robustness and cost (i.e. …

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Miniature Concrete Prism Test - A New Test Method For Evaluating The Asr Potential Of Aggregates, The Effectiveness Of Asr Mitigation And The Job Mixture, Enamur Latifee Aug 2013

Miniature Concrete Prism Test - A New Test Method For Evaluating The Asr Potential Of Aggregates, The Effectiveness Of Asr Mitigation And The Job Mixture, Enamur Latifee

All Dissertations

Existing test methods to characterize ASR potential of aggregates and mitigation ability of supplementary cementing materials such as the Accelerated Mortar Bar Test (AMBT) and the Concrete Prism Test (CPT) are widely accepted in the industry. Although, the AMBT is a rapid test, the results from this test can be unreliable, particularly with certain types of aggregates. The CPT is considered as a more reliable test; however, the duration of this test method renders it impractical for routine usage in the industry to screen deleterious materials or inefficient ASR mitigation measures. This research presents a new test method-Miniature Concrete Prism …

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Development Of An Environmental And Operational Impact Assessment Framework For Connected Vehicle Technology Supported Alternative Fuel Vehicles, Parth Bhavsar Aug 2013

Development Of An Environmental And Operational Impact Assessment Framework For Connected Vehicle Technology Supported Alternative Fuel Vehicles, Parth Bhavsar

All Dissertations

The efforts of US automobile manufacturers to introduce Alternative Fuel Vehicles (AFVs) to the automobile market, and reduce fossil fuel dependency are changing the energy consumption scenario of the US transportation network. The evolution in Connected Vehicle Technology (CVT) is further accelerating the vision of a safe and sustainable transportation system for the 21st century. However, before such system can be an actuality to meet future US transporation needs, a new generation of traffic micro-simulation tools must be developed to evaluate connected vehicle technologies that can support AFVs in the transportation network.
This research focused on developing an evaluation framework …

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Model Based Control Of Machining Processes: Exploration Of Bayesian Statistical Methods For Identification And Control, Parikshit Mehta Aug 2013

Model Based Control Of Machining Processes: Exploration Of Bayesian Statistical Methods For Identification And Control, Parikshit Mehta

All Dissertations

Machining process modeling & simulation as well as in-process monitoring and control have been identified as key technological factors to power efficient manufacturing facilities of tomorrow. The effective utilization of process models and in-process control are aimed towards improving profitability of the manufacturing process. To that end, the objective of this research work is to improve machining performance by implementing in-process control using model based control strategies, while considering stochastic models of machining process. Towards satisfying that objective, three research questions are asked.
1) What are metrics of measuring machining performance and which machining process models are important to consider …

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Mobile Robot Navigation For Person Following In Indoor Environments, Ninad Pradhan Aug 2013

Mobile Robot Navigation For Person Following In Indoor Environments, Ninad Pradhan

All Dissertations

Service robotics is a rapidly growing area of interest in robotics research. Service robots inhabit human-populated environments and carry out specific tasks. The goal of this dissertation is to develop a service robot capable of following a human leader around populated indoor environments. A classification system for person followers is proposed such that it clearly defines the expected interaction between the leader and the robotic follower. In populated environments, the robot needs to be able to detect and identify its leader and track the leader through occlusions, a common characteristic of populated spaces. An appearance-based person descriptor, which augments the …

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Development And Evaluation Of An Intelligent Transportation Systems-Based Architecture For Electric Vehicles, Zhiyun Li Aug 2013

Development And Evaluation Of An Intelligent Transportation Systems-Based Architecture For Electric Vehicles, Zhiyun Li

All Dissertations

The rapid development of increasingly complex in-vehicle electronics now offers an unprecedented level of convenience and versatility as well as accelerates the demand for connected driving experience, which can only be achieved in a comprehensive Intelligent Transportation Systems (ITS) technology based architecture. While a number of charging and range related issues continue to impede the Electric Vehicle (EV) market growth, integrating ITS technologies with EVs has the potential to address the problems and facilitate EV operations. This dissertation presents an ITS based vehicle infrastructure communication architecture in which abundant information can be exchanged in real time through vehicle-to-vehicle and vehicle-to- …

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Extreme Value Theory In Periodic Time Series, Zhiyun Gong Aug 2013

Extreme Value Theory In Periodic Time Series, Zhiyun Gong

All Dissertations

Extreme data points are important in environmental, financial, and insurance settings. In this work, we consider two topics on extremes from environmental data. Many environmental time series have a seasonal structure. The first part presents an approach to identify the rare events of such series based on time series residuals. Here, periodic autoregressive moving-average models are applied to describe the series. The methods justify the application of classical peaks over threshold methods to estimated versions of the one-step-ahead prediction errors of the series. Such methods enable the seasonal means, variances, and autocorrelations of the series to be taken into account. …

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Electrospun Nanofiber Yarns For Nanofluidic Applications, Chen-Chih Tsai Aug 2013

Electrospun Nanofiber Yarns For Nanofluidic Applications, Chen-Chih Tsai

All Dissertations

This dissertation is centered on the development and characterization of electrospun nanofiber probes. These probes are envisioned to act like sponges, drawing up fluids from microcapillaries, small organisms, and, ideally, from a single cell. Thus, the probe performance significantly depends on the materials ability to readily absorb liquids. Electrospun nanofibers gained much attention in recent decades, and have been applied in biomedical, textile, filtration, and military applications. However, most nanofibers are produced in the form of randomly deposited non-woven fiber mats. Recently, different electrospinning setups have been proposed to control alignment of electrospun nanofibers. However, reproducibility of the mechanical and …

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Development Of Stationary And Mobile Tailgating Detection Solutions For Ground Vehicles, Tyler Zellmer Aug 2013

Development Of Stationary And Mobile Tailgating Detection Solutions For Ground Vehicles, Tyler Zellmer

All Theses

Improving the safety of North American roadways is a top priority for government agencies and transportation organizations alike. Regulations on appropriate driving behavior have been developed to minimize the likelihood of crashes occurring, but law enforcement tools remain to be fully developed and applied in the field. One prominent example of this is tailgating – the dangerous act of one ground vehicle following another too closely. This activity is responsible for thousands of crashes every year, but police officers currently have few tools to accurately detect and document tailgating events. Though tailgating often occurs in a wide variety of vehicle …

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Women In Engineering: Identity Communication In Social Media, Dongni Wang Aug 2013

Women In Engineering: Identity Communication In Social Media, Dongni Wang

All Theses

This thesis examines women engineers' experience in social media with a focus on identity communication. Framing as a case study, this study attempts to explore women engineers' online presence and how they utilize social media in their daily activities. Using the concept of intersectionality, this study addresses the differences of social media usage among women engineers in terms of the use of social media by professional organizations of women engineers and the use of individual women engineers. Thematic analysis was conducted to analyze the public available data from a Facebook page maintain by a well-known women engineers' professional organization. Online …

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Spectroscopic Investigation Of Protein Corona, Poonam Choudhary Aug 2013

Spectroscopic Investigation Of Protein Corona, Poonam Choudhary

All Theses

Nanotechnology has revolutionalized the landscape of modern science and technology, including materials, electronics, therapeutics, bioimaging, sensing, and the environment. Research in the past decade has examined the fate of nanomaterials in vitro and in vivo, as well as the interactions between nanoparticles and biological and ecosystems using primarily toxicological and ecotoxicological approaches. However, due to the versatility in the physical and physicochemical properties of nanoparticles, and due to the vast complexity of their hosting systems, the solubility, transformation, and biocompatibility of nanomaterials are still poorly understood. Nanotechnology has been undergoing tremendous development in recent decades, driven by realized perceived applications …

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Development Of Map/Reduce Based Microarray Analysis Tools, Guangyu Yang Aug 2013

Development Of Map/Reduce Based Microarray Analysis Tools, Guangyu Yang

All Theses

High density oligonucleotide array (microarray) from the Affymetrix GeneChip¨ system has been widely used for the measurements of gene expressions. Currently, public data repositories, such as Gene Expression Omnibus (GEO) of the National Center for Biotechnology Information (NCBI), have accumulated very large amount of microarray data. For example, there are 84389 human and 9654 Arabidopsis microarray experiments in GEO database. Efficiently integrative analysis large amount of microarray data will provide more knowledge about the biological systems. Traditional microarray analysis tools all implemented sequential algorithms and can only be run on single processor. They are not able to handle very large …

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Avian Community Response To Fire-Mediated Regeneration Of Native Pine Stands In The Mountains Of South Carolina, Curtis Walker Aug 2013

Avian Community Response To Fire-Mediated Regeneration Of Native Pine Stands In The Mountains Of South Carolina, Curtis Walker

All Theses

To assess the impacts of fire disturbance management on the avian community at Jocassee gorges in the mountains of South Carolina, a total of 1000 10-minute, 50 m radius point counts were conducted in treatment and control plots during the spring breeding seasons of 2011 and 2012. Comparisons of avian communities were made between the burned treatment sites and reference control sites to examine community and priority species response to prescribed fire. Values of species diversity, species richness, and total number of individuals were found to be significantly higher in the burned treatment plots than in the control plots as …

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Application Of Parameter Estimation And Calibration Method For Car-Following Models, Md Rahman Aug 2013

Application Of Parameter Estimation And Calibration Method For Car-Following Models, Md Rahman

All Theses

Both safety and the capacity of the roadway system are highly dependent on the car-following characteristics of drivers. Car-following theory describes the driver behavior of vehicles following other vehicles in a traffic stream. In the last few decades, many car-following models have been developed; however, studies are still needed to improve their accuracy and reliability.
Car-following models are a vital component of traffic simulation tools that attempt to mimic driver behavior in the real world. Microscopic traffic simulators, particularly car-following models, have been extensively used in current traffic engineering studies and safety research. These models are a vital component of …

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Clemson Trustees Minutes, 2013 July 19, Clemson University Board Of Trustees Jul 2013

Clemson Trustees Minutes, 2013 July 19, Clemson University Board Of Trustees

Minutes

Minutes: Meeting of the Clemson University Board of Trustees. Dogwood & Cypress Rooms, Charleston Place Hotel, Charleston, SC. 9:30 a.m.

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Engineering Design Research: Successful Integration Of Education, Practice, And Study In The Cedar Group, Joshua D. Summers Jul 2013

Engineering Design Research: Successful Integration Of Education, Practice, And Study In The Cedar Group, Joshua D. Summers

All CEDAR Publications

Engineering design is a generally nascent area of research within the engineering disciplines, spanning only a few decades of critical investigation. Clemson University has been at the forefront of the development of this field and continues this with a living experiment in how to integrate education, practice, and research through the CEDAR group. This essay introduces the reader to design research and the areas of study within CEDAR. Following this, an analysis of the research trends exposes three pillars of CEDAR philosophy: helping others, seeking variety, and learning from others. The goal of this essay is to introduce the wider …

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Magnetic Field Generation In A Jet-Sheath Plasma Via The Kinetic Kelvin-Helmholtz Instability, K.-I. Nishikawa, P. Hardee, B. Zhang, I. Dutan, M. Medvedev, E. J. Choi, K. W. Min, J. Niemiec, Y. Mizuno, A Nordlund, J T. Frederiksen, H Sol, M Pohl, Dieter H. Hartmann Jul 2013

Magnetic Field Generation In A Jet-Sheath Plasma Via The Kinetic Kelvin-Helmholtz Instability, K.-I. Nishikawa, P. Hardee, B. Zhang, I. Dutan, M. Medvedev, E. J. Choi, K. W. Min, J. Niemiec, Y. Mizuno, A Nordlund, J T. Frederiksen, H Sol, M Pohl, Dieter H. Hartmann

Publications

We have investigated the generation of magnetic fields associated with velocity shear between an unmagne-tized relativistic jet and an unmagnetized sheath plasma. We have examined the strong magnetic fields generated by ki-netic shear (Kelvin–Helmholtz) instabilities. Compared to the previous studies using counter-streaming performed by Alves et al. (2012), the structure of the kinetic Kelvin– Helmholtz instability (KKHI) of our jet-sheath configura-tion is slightly different, even for the global evolution of the strong transverse magnetic field. In our simulations the major components of growing modes are the electric field Ez, perpendicular to the flow boundary, and the magnetic field By, transverse …

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Portable Game Based Instruction Of American Sign Language, Christyna Wilson Jul 2013

Portable Game Based Instruction Of American Sign Language, Christyna Wilson

All Theses

In this thesis, we address the effectiveness of portable gaming devices as a vehicle for learning American Sign Language. We begin by creating a multi-level game using a standard programming language, and use the game to illustrate various signed words. We translate the game to mobile devices using Kivy, a crossplatform framework. This allows the game to be compatible with multiple mobile devices and platforms. A secondary inspiration for creating a game as opposed to standard memorization techniques is to stimulate a quicker learning response as the user enjoys the sign learning process. In this thesis we provide a mobile …

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A Spectroscopic Analysis Of The Eclipsing Short-Period Binary V505 Persei And The Origin Of The Lithium Dip, Patrick Baugh, Jeremy R. King, Constantine P. Deliyannis, Ann Merchant Boesgaard Jun 2013

A Spectroscopic Analysis Of The Eclipsing Short-Period Binary V505 Persei And The Origin Of The Lithium Dip, Patrick Baugh, Jeremy R. King, Constantine P. Deliyannis, Ann Merchant Boesgaard

Publications

As a test of rotationally-induced mixing causing the well-known Li dip in older mid-F dwarfs in the local Galactic disk, we utilize high-resolution and -S/N Keck/HIRES spectroscopy to measure the Li abundance in the components of the ∼1 Gyr, [Fe/H]= −0.15 eclipsing short-period binary V505 Per. We find A(Li) ∼ 2.7 ± 0.1 and 2.4 ± 0.2 in the Teff∼6500 and 6450K primary and sec-ondary components, respectively. Previous Teff determinations and uncertainties suggest that each component is located in the midst of the Li dip. If so, their A(Li) are ≥2–5 times larger than A(Li) detections and upper limits observed …

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Clemson A&M College Class Of 1939 Reunion Program 2013, Clemson University Jun 2013

Clemson A&M College Class Of 1939 Reunion Program 2013, Clemson University

Reunion Programs

No abstract provided.

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Continuous Development Of Schemes For Parallel Computing Of The Electrostatics In Biological Systems: Implementation In Delphi, Chuan Li, Marharyta Petukh, Lin Li, Emil Alexov Jun 2013

Continuous Development Of Schemes For Parallel Computing Of The Electrostatics In Biological Systems: Implementation In Delphi, Chuan Li, Marharyta Petukh, Lin Li, Emil Alexov

Publications

Due to the enormous importance of electrostatics in molecular biology, calculating the electrostatic potential and corresponding energies has become a standard computational approach for the study of biomolecules and nano-objects immersed in water and salt phase or other media. However, the electrostatics of large macromolecules and macromolecular complexes, including nano-objects, may not be obtainable via explicit methods and even the standard continuum electrostatics methods may not be applicable due to high computational time and memory requirements. Here, we report further development of the parallelization scheme reported in our previous work (J Comput Chem. 2012 Sep 15; 33(24):1960–6.) to include parallelization …

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Cancer Missense Mutations Alter Binding Properties Of Proteins And Their Interaction Networks, Hafumi Nisha, Manoj Tyagi, Shaolei Teng, Benjamin A. Shoemaker, Kosuke Hashimoto, Emil Alexov, Stefan Wuchty, Anna R. Panchenko Jun 2013

Cancer Missense Mutations Alter Binding Properties Of Proteins And Their Interaction Networks, Hafumi Nisha, Manoj Tyagi, Shaolei Teng, Benjamin A. Shoemaker, Kosuke Hashimoto, Emil Alexov, Stefan Wuchty, Anna R. Panchenko

Publications

Many studies have shown that missense mutations might play an important role in carcinogenesis. However, the extent to which cancer mutations might affect biomolecular interactions remains unclear. Here, we map glioblastoma missense mutations on the human protein interactome, model the structures of affected protein complexes and decipher the effect of mutations on protein-protein, protein-nucleic acid and protein-ion binding interfaces. Although some missense mutations over-stabilize protein complexes, we found that the overall effect of mutations is destabilizing, mostly affecting the electrostatic component of binding energy. We also showed that mutations on interfaces resulted in more drastic changes of amino acid physico-chemical …

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The Role Of Protonation States In Ligand-Receptor Recognition And Binding, Marharyta Petukh, Shannon Stefl, Emil Alexov May 2013

The Role Of Protonation States In Ligand-Receptor Recognition And Binding, Marharyta Petukh, Shannon Stefl, Emil Alexov

Publications

In this review we discuss the role of protonation states in receptor-ligand interactions, providing experimental evidences and computational predictions that complex formation may involve titratable groups with unusual pKa’s and that protonation states frequently change from unbound to bound states. These protonation changes result in proton uptake/release, which in turn causes the pHdependence of the binding. Indeed, experimental data strongly suggest that almost any binding is pH-dependent and to be correctly modeled, the protonation states must be properly assigned prior to and after the binding. One may accurately predict the protonation states when provided with the structures of the unbound …

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Clemson Commencement Program, May 2013, Clemson University May 2013

Clemson Commencement Program, May 2013, Clemson University

Clemson Commencement Programs

No abstract provided.

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Vocabulary Games For The Beginner Interpreter Classroom, Fatima Cornwall May 2013

Vocabulary Games For The Beginner Interpreter Classroom, Fatima Cornwall

International Journal of Interpreter Education

According to the (American) National Association of Judiciary Interpreters and Translators (NAJIT) and many experts in the field of court and legal interpretation, every court interpreter should strive for an ample and extensive vocabulary in his or her working languages. Although some more traditional vocabulary activities such as fill-in-the-blank exercises, crosswords, and word searches may aid prospective and practicing court interpreters reach this goal, there are some new approaches to language teaching that make this daunting task more entertaining and engaging. In this article, the author shares five vocabulary development games for any beginner spoken-language court interpretation classroom.

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Three-Dimensional Finite Element Analysis Of Sound Transmission Performance Of Honeycomb Sandwich Structures, Xin Wang May 2013

Three-Dimensional Finite Element Analysis Of Sound Transmission Performance Of Honeycomb Sandwich Structures, Xin Wang

All Theses

Due to the lighter weight of honeycomb structures compared with a cuboid of similar material, honeycomb is widely used in applications requiring a high stiffness to weight ratio. One important honeycomb meta-structure is sandwich composites designed with a honeycomb core between two thin panel layers. The geometry of the honeycomb is formed from periodically spaced, non-overlapping unit cells. An important advantage of cellular materials such as honeycomb is that vibration and acoustic properties can be changed simply by changing the unit cell geometry variables such as included angle, cell wall thickness and length, while keeping the overall dimensions of the …

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