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Articles 2491 - 2520 of 4537
Full-Text Articles in Entire DC Network
User Experience With Cybercollaboration Technologies, Jessica Smagner
User Experience With Cybercollaboration Technologies, Jessica Smagner
Theses
This study focused on evaluating the usability of technologies for cybercollaboration via determining if traditional usability testing methods capable of evaluating virtual team collaboration among professionals and scientists of different disciplines. Exploration of this research was conducted via online survey administered to 72 participants from varied professional and scientific disciplines. This study explored several themes related to computer mediated collaboration, collaboration in science in general, usability of collaboration technologies, and usability testing. Past research was divided on whether software tools or processes are more important to team success. This research suggests that both together are important. Further, usability of cybercollaboration …
Functional Traits And Grain Size In Species Assemblages Of A Neotropical Dry Forest, Vania Wendy Torrez Flores
Functional Traits And Grain Size In Species Assemblages Of A Neotropical Dry Forest, Vania Wendy Torrez Flores
Theses
A long-standing question in ecology is how so many tree species can coexist. New insight into assembly processes has been gained through functional traits that influence fitness. Such traits include the maximum height and diameter of a species as these describe the plant’s ability to compete for light. Additionally, specific leaf area (SLA) describes the amount of leaf area for light capture per unit of biomass invested. SLA is one of the easiest traits to measure, but it depends on access to fresh leaf material which is not possible for samples from remote areas or historical collections e.g. herbaria. The …
An Unnatural History, Sarah Hearn
An Unnatural History, Sarah Hearn
Theses
An Unnatural History is an installation that inhabits the space between the continuously shifting realms of science, pseudoscience and science fiction. This project documents the (fictional) discovery of a taxonomy of marine life containing and cooperating with the elements from the periodic table. As science and technology progress, we are constantly faced with redefining, reinterpreting and reconfiguring what we thought we knew about the world around us and previous scientific "facts" are revealed to have been constructed "beliefs." Using multiple modes of representation, An Unnatural History draws attention to the real, the imagined and what it means to visualize biological …
Electronic Medical Records Concepts And Data Management, Shruti Sharma
Electronic Medical Records Concepts And Data Management, Shruti Sharma
Theses
Healthcare information (Clinical Data) is associated with every individual, young or old, rich or poor, belonging to any country. Clinical data is very extensive. Everyday some new diseases and new symptoms are being seen and the human race is struggling to find cures. There are many diseases whose diagnosis, symptoms, and possible treatment are known but unfortunately that rare knowledge is not available to every individual in the world. This initiates all the vision behind presenting a paper on EMR/ EHR and its Data Management. The thesis reviews the concept of EMR/ EHR thus explaining its concepts, importance, market need …
Sola In Nature, Yeonhee Choi
Sola In Nature, Yeonhee Choi
Theses
Sola in Nature is an invitation to encounter the internal human experience inspired by nature. Each photograph exhibits different sensibilities; exploring what the psychological self represents in nature through the images. The human mind is like air. We cannot smell, hold, and see the air, but we can feel it when we breathe. We cannot live without it. This thesis transcribes personal experience into a photographic spectacle that provides the public access, with which to examine the sophisticated mind as reflection of the self. Nature is, in this work, considered not only as spiritual existence but also as the psychological …
Aminormotiffinder - A Graph Grammar Based Tool To Effectively Search A Minor Motifs In 3d Rna Molecules, Ankur Malhotra
Aminormotiffinder - A Graph Grammar Based Tool To Effectively Search A Minor Motifs In 3d Rna Molecules, Ankur Malhotra
Theses
RNA Motifs are three dimensional folds that play important role in RNA folding and its interaction with other molecules. They basically have modular structure and are composed of conserved building blocks dependent upon the sequence. Their automated in silico identification remains a challenging task. Existing motif identification tools does not correctly identify motifs with large structure variations. Here a “graph rewriting” based method is proposed to identify motifs in real three dimensional structures. The unique encoding of A Minor Searcher takes into consideration the non canonical base pairs and also multipairing of RNA structural motifs. The accuracy is demonstrated by …
Development Of A Centrifugal Microfluidic Device For Separation And Sorting In Biological Fluids, Gaurav Sunil Bagwe
Development Of A Centrifugal Microfluidic Device For Separation And Sorting In Biological Fluids, Gaurav Sunil Bagwe
Theses
A wide interest in employing micron-scale, integrated biochemical analysis systems for economical and rapid diagnosis has been the principal motivation behind this project. Low operating costs, portability and fast diagnosis times make centrifugal microfluidic devices an attractive option in patient-side diagnostics. Some essential tasks to be performed in microfluidic devices are sample-reagent transport, mixing, separation and detection. All these tasks require precise control of the RPM and spinning time. Centrifugal micro-fluidic platforms have been successfully implemented for detection of hepatitis A, tetanus, as well as for measurement of haemoglobin and hematocrit, for DNA analysis, and for assessment of cardiac disease …
Study Of Controlled Release Of Dapsone From Modified Montmorillonite And Polymer Matrices, Jia Fan
Study Of Controlled Release Of Dapsone From Modified Montmorillonite And Polymer Matrices, Jia Fan
Theses
This thesis focuses on the controlled release system of Dapsone (DAP) as the Active Pharmaceutical Ingredient (API) intercalated into sodium montmorillonite (MMT-Na+) and their combination with an anionic copolymer (Eudragit® S100). The effects of the excipients on the API dissolution rate were studied from their release profile in simulated intestinal fluid (pH=7.4) at 37±0.5°C. In the first part of the research, ionizable Dapsone was intercalated in the interlayers of MMT-Na+ to produce a nanohybrid. In the second part of the research, the nanohybrid was melt dispersed in the polymer to produce ternary (API/ Clay/ Polymer) composites. For comparison, API-polymer solid …
Effects Of Hypertension And Aging On Vascular Smooth Muscle Cell Contribution To Reconstituted Aortic Tissue Stiffness, Nancy Lisa Sehgel
Effects Of Hypertension And Aging On Vascular Smooth Muscle Cell Contribution To Reconstituted Aortic Tissue Stiffness, Nancy Lisa Sehgel
Theses
Aortic stiffness increases with hypertension and aging, and much of this increase has been thought to occur due to changes in the extracellular matrix. However, an increase in cell stiffness could also be important. To study the cellular contribution to aortic stiffness, a reconstituted aortic tissue model (composed of vascular smooth muscle cells (VSMCs) in a collagen matrix) was developed. VSMCs isolated from thoracic aortic samples of 5-week and 18-week old male spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto (WKY) rats were passaged four times and then separately incubated in collagen for two days on a cylindrical mandrel. The resulting …
Discovering Inner Ear And Central Auditory System Cellular Pathways That Might Contribute To Age-Related Hearing Loss, Xiaoxi Liu
Theses
Age-related hearing loss (ARHL) is a prevalent communication problem among senior citizens. Previous work (Tadros et al., 2008) has revealed genes which change their expression significantly with aging and hearing loss. However, this study is limited as it mainly focuses on apoptosis-related genes. Genes that regulate biological pathways other than apoptosis might also contribute to the development of age-related hearing loss, as suggested by some studies (Tadros et al., 2007; Souza et al., 2008). In order to circumvent this limitation and to better understand the underlying mechanisms of this communication problem, a free computational tool called Gene Set Enrichment Analysis …
Development And Evaluation Of A Multimedia Intensive Web-Based Exercise Motivation Tool, Rico Jamaine Kornegay
Development And Evaluation Of A Multimedia Intensive Web-Based Exercise Motivation Tool, Rico Jamaine Kornegay
Theses
A Multimedia-Intensive Web-Based Exercise Motivation Tool named WEMURCT (Web-Based Multi-User Randomized Circuit Training) was developed to utilize modern technology and web-based mediums to address the lack of motivation that an individual has when it comes to exercising regularly. This project was implemented using state-of-art rich internet application (RIA) technology. Popular RIA technologies that are optimized for creating multimedia-intensive applications are Flash by Adobe and Silverlight by Microsoft. In using Silverlight 4.0, we took advantage of multimedia data being embedded in a web-based application, which will be running in a web browser, to provide audio and visual instructions for the user …
A Study Of Magnesium Oxide Biodegradable Coatings For Magnesium-Based Implants., Ashlyn N. Worthy
A Study Of Magnesium Oxide Biodegradable Coatings For Magnesium-Based Implants., Ashlyn N. Worthy
Theses
Magnesium (Mg) and its alloys are great candidates for uses in orthopedic implant applications due to their biocompatibility, mechanical properties and degradability. However, Mg and its alloys are susceptible to accelerated degradation rates due to galvanic corrosion, which leads to unpredictable corrosion behavior. The objective of this study is to develop biocompatible, functional thin film magnesium oxide (MgO) coatings that: (1) serve as a galvanic separator between metallic substrates and metallic coatings, (2) control the rate of corrosion of Mg-based implants, (3) have controlled resorption times based on coating thickness, (4) promote osseointegration and (5) are predictable in corrosive environments. …
Application Of Kalman Filter With Time Correlated Measurement Errors In Subsurface Contaminant Transport Modeling, Godfrey Mills
Application Of Kalman Filter With Time Correlated Measurement Errors In Subsurface Contaminant Transport Modeling, Godfrey Mills
Theses
Contaminant transport modeling of a conservative solute in the subsurface is investigated by applying a Kalman filter (KF) with time correlated measurement errors. The usual method or assumption often employed is white Gaussian errors, but time correlated measurement errors were used instead for this research, since some hydrological observation data exhibit time correlated error characteristics. An observation data was generated from a two dimensional analytical solution with an additive time correlated random errors. This was used as the measurement Equation for the KF with time correlated measurement errors and the KF with white Gaussian errors. The measurement differencing algorithm was …
Identification Of A Second Putative Receptor For Infectious Pancreatic Necrosis Virus, Khrystal C. Mcgrant
Identification Of A Second Putative Receptor For Infectious Pancreatic Necrosis Virus, Khrystal C. Mcgrant
Theses
Infectious pancreatic necrosis virus (IPNV) is a bi-segmented, double stranded RNA virus that causes high mortality in young salmonid fish worldwide. As an obligate intracellular parasite, the first stage of the IPNV infectious cycle is the binding of the virus to a receptor in the host cell membrane. Recently, research has focused on identifying the IPNV receptor, and several scientists have reported binding of IPNV to a protein of approximately 220-250 kDa. The focus of this research was to investigate and reaffirm the identity of the IPNV receptor(s) for IPNV serotypes VR-299 and Sp in Chinook Salmon Embryo (CHSE-214) cells …
Synthesis And Characterization Of Molecularly Imprinted Cross-Linked Poly (4-Vinylpyridine) For The Recognition And Concentrationdetermination Of Bilirubin In Solution, Alex Aboagye
Theses
Molecular imprinting is a procedure for the preparation of artificial receptors for specific binding with target molecule. In this work molecularly imprinted polymer (MIP) film for the recognition of bilirubin was synthesized and studied using the Quartz Crystal Microbalance (QCM). The MIP was coated on the QCM crystals and analyzed using QCM. 4-vinylpyridine was used as functional monomer, divinylbenzene as cross-linking agent and benzophenone as initiator. As a control, another polymer was prepared in the same way as the MIP but without the template monomer. The control polymer or the non-MIP exhibited very little affinity for the target molecule compared …
Tracing The Origins And Propagation Of African Easterly Waves And Mesoscale Convective Systems Using Pattern Recognition And Data Fusion, Chaunte' W. Lacewell
Tracing The Origins And Propagation Of African Easterly Waves And Mesoscale Convective Systems Using Pattern Recognition And Data Fusion, Chaunte' W. Lacewell
Theses
This thesis is focus on developing pattern recognition techniques to trace the origins and propagation of the Pre-Tropical Storm Debby (2006) African easterly waves (AEWs) and mesoscale convective systems (MCSs) using satellite imagery. The results are used to verify a numerical weather prediction (NWP) model. The pre-Debby MCSs’ movement and formation needs to be precisely and objectively tracked. These MCSs could be generated over mountains in North Africa, such as Ethiopian Highlands (EH), Darfur Mountains (DF), and Asir Mountains (AS), going through complicated splitting and merging processes. Thus, an objectively analyzed MCS movement is essential not only to help provide …
Classification Of Civilian Vehicle Sounds Using A Large Database Of Vehicle Sounds, David Tettey
Classification Of Civilian Vehicle Sounds Using A Large Database Of Vehicle Sounds, David Tettey
Theses
We have completed the building of an extensive database of civilian vehicle sounds. The database consists of correlated acoustic and seismic signatures of a large number (exceeding 850) of civilian vehicles. Each acoustic signature is obtained through two high-quality microphones separated by 25 feet, and whose signals are exactly synchronized. In this work, spectral and tristimulus features of civilian vehicle sounds are computed and then submitted to further processing using principal component analysis. The "super" features, derived after principal component analysis is performed, are then used for classification. In this research effort, the performance of the quadratic classifier with that …
Characterization Of Msw As A Feedstock Of Thermochemical Conversion, Harith Kumar Rojanala
Characterization Of Msw As A Feedstock Of Thermochemical Conversion, Harith Kumar Rojanala
Theses
The management of municipal solid waste (MSW) has become a significant environmental problem, especially in fast-growing cities. Hence the thermo chemical conversion of Municipal solid waste (MSW) has been proven as an attractive method of waste management to recover energy from MSW. This would minimize its environmental impact and decrease disposal costs. In this thesis, the MSW is characterized to determine the feasibility for thermo chemical conversion. The samples are collected from different MSW transfer locations across North Carolina. Selected physical and chemical properties such as the moisture content, heating value, elemental composition and thermal degradation characteristics of the samples …
A New Class Of Haemophilus Ducreyi? Molecular Characterization Of Samoa Strains Sb 5755, Sb 5756,Sb 5757, And Be 3145, Nichol S. Murray
A New Class Of Haemophilus Ducreyi? Molecular Characterization Of Samoa Strains Sb 5755, Sb 5756,Sb 5757, And Be 3145, Nichol S. Murray
Theses
Haemophilus ducreyi is a Gram negative, strict human pathogen that causes the genital ulcer disease chancroid. Chancroid is a sexually transmitted infection that may aid in transmission of the Human Immunodeficiency Virus. Haemophilus ducreyi can be categorized into two strain classes, class I (CI) and class II (CII), based on variations in DNA sequence and protein expression of several virulence determinants including Ducreyi Serum Resistance protein A (DsrA) and the Necessary for Collagen Adhesion protein (NcaA). Recently, the first description of non-sexually associated chancroid transmission in children with chronic lower limb ulcerations was reported. Bacteria isolated from the children were …
A Stochastic Capacitated Facility Location Model For Pre-Positioning Port Commodities During A Disaster, Jessye Leigh Bemley
A Stochastic Capacitated Facility Location Model For Pre-Positioning Port Commodities During A Disaster, Jessye Leigh Bemley
Theses
As the intensity of natural disasters increases, there is a need to develop policies and procedures to assist various humanitarian relief groups, industry or government agencies with moving aid to affected areas. One of the biggest hindrances to this process is damage to transportation networks, in particular, waterways. To keep waterways safe, aids to navigation (ATONs) are placed in various areas to guide mariners and ships to their final destinations. If the ATONs are damaged, then the waterways are left unsafe and it is difficult to move supplies to repair them and recover from a disaster. A stochastic facility location …
Groundwater Remediation Using Micro And Nano-Sized Zvi And Kmno4 To Treat Trichloroethylene (Tce) Contamination, Semienawit Berhane Ghebrezadik
Groundwater Remediation Using Micro And Nano-Sized Zvi And Kmno4 To Treat Trichloroethylene (Tce) Contamination, Semienawit Berhane Ghebrezadik
Theses
Liquid and gaseous oxidants for years have demonstrated the ability to reduce or destroy organic compounds that can be harmful. Using the fundamental concepts of chemical oxidation, this research investigates the ability to develop solid structured controlled release systems that are able to deliver chemical oxidants and reduce chemicals for environmental remediation. Controlled release systems have become widely used for various applications such as in medical and agricultural industries. Applying this knowledge, micro to nano-sizes of potassium permanganate (KMnO4) and zero-valent iron (ZVI) were encapsulated in two biodegradable polymers. The biodegradable polymers used were polycaprolactone (PCL) and polylactic acid (PLA). …
Fabrication Of Pd-Cu Membranes By Surfactant Induced Electroless Plating (Siep), Md. Saiful Islam
Fabrication Of Pd-Cu Membranes By Surfactant Induced Electroless Plating (Siep), Md. Saiful Islam
Theses
Pd-Cu composite membranes on microporous stainless steel substrate (MPSS) were fabricated by novel electroless plating (EP process. In conventional Pd-EP process, the oxidation-reduction reactions between Pd-complex and hydrazine result in evolution of NH3 and N2 gas bubbles. When adhering to a substrate surface and in the pores, these gas bubbles can hinder uniform Pd-film deposition, which results in dendrite growth leading to poor film formation. We addressed this problem by introducing cationic surfactant in the electroless plating process known as surfactant induced electroless plating (SIEP). The unique features of this innovation provide control of (1) Pd- and Cudeposition rate, and …
Evaluation Of Rice Extract As A Potential Stabilizer In Plain Yogurt, Sangeetha Nurani Viswanathan
Evaluation Of Rice Extract As A Potential Stabilizer In Plain Yogurt, Sangeetha Nurani Viswanathan
Theses
Quality and consumer acceptability are essential parameters in dairy products The objectives of the present study were to examine the microbiological (viability of L. bulgaricus, S. thermophilus, and bifidobacteria), chemical (pH, titratable acidity, and total solids), and physical(syneresis) qualities of yogurt enriched with rice extract as a stabilizer during 28 days of storage at 4°C. Additionally, viscosity measurements and consumer acceptability were determined for yogurt enriched with rice extract. Results showed that the viability of L. bulgaricus was maintained with the addition of rice extract. Population of Streptococcus thermophilus and bifidobacteria decreased significantly (p<0.05) in the control sample but the addition of rice extract at 15% concentration supported the viability of bifidobacteria in yogurt over storage. The addition of rice extract did not alter the pH or titratable acidity of yogurt. Viscosity, total solids and syneresis values slightly changed with the addition of rice extract. Yogurt prepared with rice extract ranked higher in terms of texture and appearance by the panelists. Our results indicated that the addition of rice extract could improve the quality characteristics and consumer acceptability of plain yogurt. Hence, rice extract has a promising potential to be used as an alternative stabilizer in dairy products.
Nutritional And Field Ecology Of Stink Bugs On Tomato And Cowpea Under Two Insecticide Regimens, Akamu Jude Ewunkem
Nutritional And Field Ecology Of Stink Bugs On Tomato And Cowpea Under Two Insecticide Regimens, Akamu Jude Ewunkem
Theses
A laboratory study was conducted to compare food utilization and suitability of Nezara viridula on selected varieties of tomato and cowpea. A two-year field study was performed to evaluate the effectiveness of biorational pesticides (Agroneem®) and conventional pesticides (Imidacloprid or Thiamethoxam) to suppress and enhance the population of insect pests and beneficial, respectively, on both crops. In the first year both pesticide groups were applied following manufacturer’s recommendation (10-14 d cycles), and in the second year the application of the pesticides was driven by monitored thresholds of insect pests. In the laboratory study conducted on the feeding behavior, nymphs performed …
Synergy In Biorational Insecticides Applied To Collard Greens , Brassica Oleracea , Infested With Diamondback Moths, Plutella Xylostella (Lepidopedra : Yponomeutidae), Matthew Conklin Flanery
Synergy In Biorational Insecticides Applied To Collard Greens , Brassica Oleracea , Infested With Diamondback Moths, Plutella Xylostella (Lepidopedra : Yponomeutidae), Matthew Conklin Flanery
Theses
The pest status of the diamondback moth, Plutella xylostella, has risen as it has become resistant to most insecticides used for its control. Insecticide mixtures could be exploited to slow down resistance development in the diamondback moth. We evaluated various mixtures comprising: Agroneem Plus® , spinosad, thiamethoxam and jalapeño pepper extract using laboratory bioassays with a view to obtaining a combination that could be adopted by small growers. These mixtures were applied to collard greens using the leaf dip method and fed to second to fourth instar larvae in bioassays. The mixtures were evaluated for their effect on larval fitness …
Obstructing Authenticity: The Church And Sexuality In Randall Kenan’S A Visitation Of Spirits And Jeanette Winterson’S Oranges Are Not The Only Fruit, Kyesha L. Jennings
Obstructing Authenticity: The Church And Sexuality In Randall Kenan’S A Visitation Of Spirits And Jeanette Winterson’S Oranges Are Not The Only Fruit, Kyesha L. Jennings
Theses
The dominant beliefs of a society determine what it finds acceptable and socially constructed theories generally valorize only heterosexism. Thus, global society has viewed homosexuality as a repudiation of the norm—an aberration, a disease, or a “lifestyle”—all of which carry negative social connotations. While this particularly characterizes churches within the African American community, identical issues occur within other denominations of Christianity. This study will explore literary texts that display how the Christian church, more specifically the Baptist and Pentecostal denominations, obstruct homosexuals’ identity by implementing a limited, rigid morality that rejects all who do not fit within its code, a …
In Vitro Galax Urceolata Seed Propagation Under Different Treatments, Rachel C. Jackson
In Vitro Galax Urceolata Seed Propagation Under Different Treatments, Rachel C. Jackson
Theses
Galax urceolata which is native from Virginia to Georgia is becoming threatened due to overharvesting. Expediting the multiplication of Galax would increase its potential in becoming an economically viable cash crop while protecting the wild population. The overall goal of this study was to develop a protocol for in vitro Galax germination and proliferation. Influences of light intensity, culture medium pH, temperature stratification, and seed maturity as were studied for their effects on Galax seed germination in vitro. Plant growth regulators (PGRs) BA, IBA, and GA3 were tested for their effects on germination. BA and IBA were also tested for …
Human Papillomavirus Knowledge And Awareness Among North Carolina College Students, Aliza T. Alston
Human Papillomavirus Knowledge And Awareness Among North Carolina College Students, Aliza T. Alston
Theses
The objective of the present study is to ascertain overall knowledge, attitude and awareness of students at select North Carolina Universities about HPV, the HPV vaccine Gardasil and the connection between HPV and various cancers. Five hundred and two university students (NCAT, NCCU, ECU and UNCG), 303 females and 199 males, ages 18 or older (89.6% were between the ages of 18-22) participated in a cross-sectional study by completing a survey. Students at these universities were randomly selected based on their enrollment in introductory biology courses for non majors. Other students were chosen randomly by face to face contact in …
How Can We Nurture And Develop Creativity In First Year Design Students, Kerry Meakin
How Can We Nurture And Develop Creativity In First Year Design Students, Kerry Meakin
Theses
This research paper investigates the perceptions of first year third level design students regarding their creative thinking and use of creative strategies, while studying a first year design based curriculum in an Institute of Technology in Dublin. The research was conducted in a three-phase, sequential project. The first phase, questioned twenty seven students by issuing anonymous questionnaires to gather data on their methods of incubating design ideas, if they experienced any levels of anxiety when doing so, and their satisfaction levels in their design and creative abilities. Literature was reviewed to discover the attributes of those we perceive as creative …
Increasing Organ Donation In Ireland : Social Marketing And Infrastructural Improvements., Ronan O'Sullivan
Increasing Organ Donation In Ireland : Social Marketing And Infrastructural Improvements., Ronan O'Sullivan
Theses
There were over 600 patients on the organ waiting list in Ireland in November 2010. This is a substantial increase on the 414 patients on the waiting list in 2008. Ireland also witnessed a dramatic decline in the number of donors from 90 donors in 2009 to 58 donors in 2010. This thesis focuses on investigating the current state of organ donation in the Republic of Ireland, with the eventual goal of recommending alterations to improve the system. In depth- interviews were conducted with eleven leading personnel from the fields of organ donation and social marketing in Ireland as well …