Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Clemson University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 4501 - 4530 of 6179

Full-Text Articles in Entire DC Network

Optical Force Based Cancer Cell Identification, Justin Roman Dec 2007

Optical Force Based Cancer Cell Identification, Justin Roman

All Theses

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 …

Go to article

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

All Theses

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 …

Go to article

Wafer Probe And Package Test Failure Analysis, Deepa Kalva Dec 2007

Wafer Probe And Package Test Failure Analysis, Deepa Kalva

All Theses

In recent years, NAND flash memory has gained a lot of momentum in the semiconductor industry and has become an ideal choice for many consumer and communication products. One of the key elements in the successful production of NAND flash memory is to incorporate elaborate testing methods to ensure functionality and reliability before the part reaches the customer. This in turn necessitates the evaluation and understanding of different failure mechanisms, and the development of methodologies to correct problems.
In this thesis, failure analysis was performed on NAND flash memory at wafer and package level. This involved massive data collection and …

Go to article

Importance And Availability Of Content And Communication Skills Among Entry-Level Interpretive Naturalists, Jonathan Ivey Dec 2007

Importance And Availability Of Content And Communication Skills Among Entry-Level Interpretive Naturalists, Jonathan Ivey

All Theses

Interpretation seeks to help visitors to make intellectual and emotional connections between themselves and park resources through a communication process. To accomplish this goal, interpreters must be intimately knowledgeable of park resources as well as excellent communicators. The details of what types of knowledge and communication skills are most important to interpretive naturalists have not been formally documented. Likewise, little is formally known about the availability of each skill in pools of entry-level applicants for interpretive positions. This study documented the varying importance and availability of content and communication skills for entry-level interpretive naturalists, based on the perceptions of experienced …

Go to article

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 …

Go to article

Characterization Of The Anti-Angiogenic Properties Of Kdr-Ig4-7 And Its Variants As Potential Anti-Cancer Therapeutics, Jang Pyo Park Dec 2007

Characterization Of The Anti-Angiogenic Properties Of Kdr-Ig4-7 And Its Variants As Potential Anti-Cancer Therapeutics, Jang Pyo Park

All Dissertations

Beginning with the development of an embryo and throughout one's adult life angiogenesis plays an essential role for organ growth and repair. The balancing of pro-angiogenic factors to anti-angiogenic factors is what regulates the process of angiogenesis. When this balance is disrupted in one direction or the other, numerous disorders can occur including ocular and inflammatory diseases and, in particular, tumor growth and metastasis. Therefore, inhibition of angiogenesis has become an effective therapy for arresting the growth of tumors.
A key regulator of angiogenesis involves vascular endothelial growth factor (VEGF) and its receptor, VEGFR-2 (KDR). The binding of VEGF to …

Go to article

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

All Dissertations

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 …

Go to article

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

All Dissertations

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 …

Go to article

Development Of An In Vitro Test System For Breast Cancer Research, Chih-Chao Yang Dec 2007

Development Of An In Vitro Test System For Breast Cancer Research, Chih-Chao Yang

All Dissertations

In the United States, breast cancer is the third most common cause of cancer death (after lung cancer and colon cancer). In 2007, breast cancer is expected to cause 40,910 deaths (7% of cancer deaths; almost 2% of all deaths) in the U.S. The long term goal of this project is to develop an in vitro test system that can be used to develop breast cancer vaccine or screen breast cancer chemotherapy. This dissertation was driven by four objectives and it can be thought as a toolbox that provides practical experimental design and lab work for the development of an …

Go to article

The Diffusion Of The Reggio Emilia Approach Among Early Childhood Teacher Educators In South Carolina, Julie Hartman Dec 2007

The Diffusion Of The Reggio Emilia Approach Among Early Childhood Teacher Educators In South Carolina, Julie Hartman

All Dissertations

Growing numbers of U.S. educators are traveling to the northern Italian town of Reggio Emilia to study the innovative, arts-based approach to early education developed in the town's municipal infant-toddler and pre-primary programs now commonly referred to as the Reggio Emilia Approach. And though there is no way of knowing exactly how many educators and early childhood programs across the U.S. are currently making use of the approach, increasing numbers of U.S. colleges and universities are including the approach in both their ECE teacher preparation as well as campus child development programs, suggesting the Reggio Emilia Approach (REA) is diffusing …

Go to article

Enhancing The Ability Of Panicum Virgatum To Survive Flooding And Its Effects On Soil Activity When Used For Lakeshore Stabilization, Lee Edwards Dec 2007

Enhancing The Ability Of Panicum Virgatum To Survive Flooding And Its Effects On Soil Activity When Used For Lakeshore Stabilization, Lee Edwards

All Dissertations

Reservoirs in upstate South Carolina are subject to erosion and vegetation has been placed to help stabilize banks, but soils are nutrient-poor and have high bulk densities. Panicum virgatum L. (switchgrass) has been planted in several sites, and it is hypothesized that over time, changes in microbial activity and soil quality will occur in response to the planting. As vegetated sites aged, acid phosphomonoesterase, nitrate reductase, and dehydrogenase activity increased. Low values of nitrogen fixation and substrate-induced respiration were measured at all sites with no statistical differences between sites. Fatty acids indicative of Gram negative bacteria were found in vegetated …

Go to article

The Consumer Choice Of E-Channels As A Purchasing Avenue: An Investigation Of The Communicative Aspects Of Information Qualtiy , Jaejoo Lim Dec 2007

The Consumer Choice Of E-Channels As A Purchasing Avenue: An Investigation Of The Communicative Aspects Of Information Qualtiy , Jaejoo Lim

All Dissertations

A conspicuous paradox is evident in the statistics concerning purchases over the internet. While a majority of the US population uses the internet to seek product information for purchasing decisions, less than two percent of actual retail sales occur on the Internet. To explain this small ratio of e-channel choice for purchase, a comprehensive model that extends DeLone and McLean's (2004) e-commerce success model was developed. The model centers on the importance of perceived information quality and its relationship to e-channel choice as a purchasing channel. Using the overarching theoretical frame of motivation, two questions were examined: (a) what influences …

Go to article

Ultrahydrophobic Surface Modification Of Polymeric Fibers And Inorganic Substrates, Karthik Ramaratnam Dec 2007

Ultrahydrophobic Surface Modification Of Polymeric Fibers And Inorganic Substrates, Karthik Ramaratnam

All Dissertations

The wettability of a solid surface is a very important property, and is governed by both the chemical composition and the geometrical microstructure of the surface. Wettability and repellency are important properties of solid surfaces from both fundamental and practical aspects. The wettability of the solid surface is a characteristic property of materials and strongly depends on both the surface energy and the surface roughness. These properties may be approached by mimicking hydrophobic structures created by nature on lotus leaf surface. The lotus effect is based on surface roughness caused by different microstructures together with the hydrophobic properties of the …

Go to article

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 …

Go to article

Nesting And Foraging Characteristics Of The Black Carpenter Ant Camponotus Pennsylvanicus (Degeer) (Hymenoptera: Formicidae), Donald Oswalt Dec 2007

Nesting And Foraging Characteristics Of The Black Carpenter Ant Camponotus Pennsylvanicus (Degeer) (Hymenoptera: Formicidae), Donald Oswalt

All Dissertations

Potential nesting sites of Camponotus pennsylvanicus (DeGeer) were investigated in South Carolina to determine if nesting sites features could be characterized by habitat features for black carpenter ant nests. Environmental data from forested plots showed large-scale habitat features such as vegetation density and canopy cover were not useful as indicators for the presence or absence of nests. Small-scale individual nest characteristics such as diameter at breast height of trees, log length, tree defect type or tree species were better indicators of occupied nests. In my study, C. pennsylvanicus preferred mature hardwood (Quercus spp.) trees approximately 30 cm in diameter and …

Go to article

Apparent Quality Of Alternative Halftone Screening When Compared To Conventional Screening In Commmercial Offset Lithography, Garth Oliver Dec 2007

Apparent Quality Of Alternative Halftone Screening When Compared To Conventional Screening In Commmercial Offset Lithography, Garth Oliver

All Dissertations

ABSTRACT

Printers are still concerned with craftsmanship and are always looking for means to produce faster print jobs with improved quality. The invention of new halftone screening techniques is one of the methods imaging companies have used as an attempt to improve the quality of the printed piece. These techniques can possibly improve the aesthetic qualities and fidelity of printed reproductions, therefore printers and students of printing need to study these techniques to ensure that the benefits outweigh the costs of implementation.
This experimental study was conducted to measure the quality of printed halftones that were screened with three different …

Go to article

The Lss Supernodulation Mutant In Medicago Truncatula: Genetics, Characterization And Mapping, Arijit Mukherjee Dec 2007

The Lss Supernodulation Mutant In Medicago Truncatula: Genetics, Characterization And Mapping, Arijit Mukherjee

All Dissertations

The symbiotic association between legumes and nitrogen fixing rhizobia culminates in the formation of root nodules. Legumes control the extent of root nodule formation through a regulatory mechanism in which nodulating roots induce a shoot response that signals back to the roots, inhibiting further nodule initiation. Disruption of genes involved in this regulatory process lead to super or hypernodulation. The lss (like sunn supernodulator) mutant of Medicago truncatula has been identified as a naturally occurring supernodulation mutation in the Jemalong cultivar. The phenotype of lss is practically indistinguishable from the phenotype of the previously isolated sunn mutant with respect to …

Go to article

Studies In The Biochemistry And Cell Biology Of Trypanosoma Brucei Hexokinases, Jeremy Chambers Dec 2007

Studies In The Biochemistry And Cell Biology Of Trypanosoma Brucei Hexokinases, Jeremy Chambers

All Dissertations

Trypanosoma brucei expresses two hexokinases (TbHK1 and TbHK2) that are 98% identical at the amino acid level. We previously found that recombinant TbHK1 (rTbHK1) has hexokinase activity, while rTbHK2 did not, a finding attributed to differences in the C-termini of the proteins. We found that the C-terminal tails of TbHK contained a novel motif specific for eukaryotic hexokinases found within the final helix of an ATP-binding domain. By altering the residues in the C-terminal tail of TbHK1 to resemble the residues found in TbHK2, we found that D454, F462, M466, and N469 were essential to TbHK1 catalysis. Additionally, we found …

Go to article

Figuring The Digital, Molly Morin Dec 2007

Figuring The Digital, Molly Morin

All Theses

This body of work is a way of understanding, reflecting on, and contributing to a contemporary dialogue about the impact of digital technology and the Internet on society by looking at the organization of information that lies behind the computer screen, and creating work that is sourced directly from the Internet but becomes a tangible object in the physical world. I use methods of mass production and marketing to create artwork that values individuality over homogenization and complexity over efficiency, co-opting practical digital technology for the purposes of physical beauty. The work should inspire a sense of wonder through its …

Go to article

Mixed Convective Heat Transfer And Evaporation At The Air-Water Interface, Prasad Gokhale Dec 2007

Mixed Convective Heat Transfer And Evaporation At The Air-Water Interface, Prasad Gokhale

All Theses

Functional forms for mixed convective heat transfer and evaporation from an air-water interface were obtained. To obtain these functions, heat transfer and evaporation rates from the air-water interface of an evaporating body of water were quantified in a wind/water tunnel in the presence of an oleyl alcohol monolayer on the water surface. The Nusselt (Nu) and Sherwood (Sh) numbers, parameterizing the dimensionless heat and mass transfer respectively, for transport from the water bulk to air were expressed as functions of the air side Rayleigh (Ra) and Reynolds (Re) numbers. The Nu and Sh were calculated for a range of Ra …

Go to article

Yearbooks As A Genre: A Case Study, Melissa Caudill Dec 2007

Yearbooks As A Genre: A Case Study, Melissa Caudill

All Theses

ABSTRACT
In the United States, high school and college yearbooks are extraordinarily well known as a genre, yet they are largely unstudied. Yearbooks preserve images, stories, and facts from each year for one specific group of people, linked by age and geographic community. Yearbook production is a significant commercial enterprise, yet it involves novice writers, editors, and designers. Blending elements of craft, tradition, business, and media, yearbooks as a distinctive genre bear closer rhetorical study and application of professional communication theories.
This historical case study of production practices for a particular college yearbook positions yearbooks rhetorically as texts and sites …

Go to article

A Breakdown In Boundaries: As Explored Through Abjection And The Language Of Abstract Art, Mary Hanley Dec 2007

A Breakdown In Boundaries: As Explored Through Abjection And The Language Of Abstract Art, Mary Hanley

All Theses

ABSTRACT
My work places emphasis on the anxiety and allure felt at the possibility of ingesting an object belonging to or displaced from the body through the language of abstract art. It links the fears and fascinations felt in situations of perceived abnormality and bodily aggression, to the objectification, or conversely abjection, of objects through images. I investigate a collapse in division between what the perceived identity of a thing or person is, and what it is not.
Each painting rejects an ideal of beauty as portrayed through stability, clarity, and compartmentalization, and embraces beauty as the interconnectedness of opposing …

Go to article

The Home Tie, Christina Davenport Dec 2007

The Home Tie, Christina Davenport

All Theses

The Home Tie is a collection of short fiction that utilizes place as a vital literary element by exploring the southern landscape and giving a candid rendering of the people who live in the region. Outsiders' conceptions of the South are varied, from the genteel southern belle strolling beneath the Spanish moss of her Savannah plantation to the unrefined redneck blaring country-western music from his oversized pick-up truck; from the clergyman greeting his long procession of faithful church-goers to the Klansman still calling his secret meetings somewhere in the backwoods of Appalachia. There is a feeling, both within and without, …

Go to article

Mixed Signals, Elizabeth Snipes Dec 2007

Mixed Signals, Elizabeth Snipes

All Theses

My oil on wooden panel paintings demonstrate a curiosity and fondness for a traditional subject, the human figure, and utilize a representational vocabulary to examine an interest in current modes of interpersonal interaction. The work has evolved in conjunction with an investigation of contemporary figurative painting with the purpose of translating a traditional genre and subject matter into a present context of remediation and digital social networking. The resulting paintings utilize recurrent art historical themes of the isolated figure and the sublime, and also contribute to a contemporary conversation surrounding painting's relationship to new media and photography in the twenty-first …

Go to article

A Comparison And Contrast Of The History Of Christianity As It Developed In Cappadocia And Armenia During The First Five Centuries Ad, Judy Henzel Dec 2007

A Comparison And Contrast Of The History Of Christianity As It Developed In Cappadocia And Armenia During The First Five Centuries Ad, Judy Henzel

All Theses

The purpose of this thesis is to examine key political, cultural or environmental factors which affected the rise and development of Christianity in two specific regions of eastern Anatolia during the first to fifth centuries AD. Hagiography and chronicle often portray the progress of Christianity as deterministic and providential. However, unique cultural and political elements proved very influential in shaping the success and forms of Christianity in Cappadocia and Armenia, particularly in the fourth and fifth centuries AD.

Go to article

Biohydrogen Production By The Hyperthermophilic Bacterium Thermotoga Neapolitana, Xiaohui Yu Dec 2007

Biohydrogen Production By The Hyperthermophilic Bacterium Thermotoga Neapolitana, Xiaohui Yu

All Dissertations

ABSTRACT Thermotoga neapolitana can use different sources of carbon and nitrogen for growth and produces biological hydrogen. Sources of carbon (glucose, sucrose, xylose, xylan, cellulose, cellobiose, starch, corn starch, beet bulp pellet, and rice flour) and nitrogen (yeast extract, fish meal, cottonseed meal, canola meal, linseed meal, and soybean meal) were compared. In the carbon studies, glucose, sucrose, rice flour, and xylan produced similar levels of hydrogen. In the nitrogen studies, Trypticase combined with alternative nitrogen sources can efficiently increases the yield of hydrogen produced by Thermotoga neapolitana. Yeast extract with trypticase as the dual nitrogen sources produced significantly increased …

Go to article

Records And States; Memory Explored Through Process And Narrative, Rachael Madeline Dec 2007

Records And States; Memory Explored Through Process And Narrative, Rachael Madeline

All Theses

ABSTRACT
These series of prints, Records and States, demonstrate an investigation into memory through process and narrative. Each body of work serves as a documentation of memory, operating through differing visual vocabularies. The content and process relies on remembering and repeating a matrix to express the traces of memory. Records are a body of information based on past events, compiled and preserved to represent the passage of time through the use of text and numerical symbols. This is a literal and metaphorical association; the process is a time consuming and meditative endeavor whose visual results represent the construction and breakdown …

Go to article

The Tiger Vol. 101 Issue 24 2007-11-30, Clemson University Nov 2007

The Tiger Vol. 101 Issue 24 2007-11-30, Clemson University

Tiger Newspapers

No abstract provided.

Go to article

The Tiger Vol. 101 Issue 23 2007-11-16, Clemson University Nov 2007

The Tiger Vol. 101 Issue 23 2007-11-16, Clemson University

Tiger Newspapers

No abstract provided.

Go to article

Optimization Of Electrostatic Interactions In Protein-Protein Complexes, Kelly Brock, Kemper Talley, Kacey Coley, Petras Kundrotas, Emil Alexov Nov 2007

Optimization Of Electrostatic Interactions In Protein-Protein Complexes, Kelly Brock, Kemper Talley, Kacey Coley, Petras Kundrotas, Emil Alexov

Publications

In this article, we present a statistical analysis of the electrostatic properties of 298 protein-protein complexes and 356 domain-domain structures extracted from the previously developed database of protein complexes (ProtCom, http://www.ces.clemson.edu/compbio/protcom). For each structure in the dataset we calculated the total electrostatic energy of the binding and its two components, Coulombic and reaction field energy. It was found that in a vast majority of the cases (>90%), the total electrostatic component of the binding energy was unfavorable. At the same time, the Coulombic component of the binding energy was found to favor the complex formation while …

Go to article

First Prev Next Last