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Articles 3511 - 3540 of 7872
Full-Text Articles in Entire DC Network
Incorporating Remotely Sensed Data Into Coastal Hydrodynamic Models: Parameterization Of Surface Roughness And Spatio-Temporal Validation Of Inundation Area, Stephen Conroy Medeiros
Incorporating Remotely Sensed Data Into Coastal Hydrodynamic Models: Parameterization Of Surface Roughness And Spatio-Temporal Validation Of Inundation Area, Stephen Conroy Medeiros
Electronic Theses and Dissertations
This dissertation investigates the use of remotely sensed data in coastal tide and inundation models, specifically how these data could be more effectively integrated into model construction and performance assessment techniques. It includes a review of numerical wetting and drying algorithms, a method for constructing a seamless digital terrain model including the handling of tidal datums, an investigation into the accuracy of land use / land cover (LULC) based surface roughness parameterization schemes, an application of a cutting edge remotely sensed inundation detection method to assess the performance of a tidal model, and a preliminary investigation into using 3-dimensional airborne …
Thermally Annealled Plasmonic Nanostructures, Chaoming Wang
Thermally Annealled Plasmonic Nanostructures, Chaoming Wang
Electronic Theses and Dissertations
Localized surface plasmon resonance (LSPR) is induced in metal nanoparticles by resonance between incident photons and conduction electrons in nanoparticles. For noble metal nanoparticles, LSPR can lead to strong absorbance of ultraviolet-violet light. Although it is well known that LSPR depends on the size and shape of nanoparticles, the inter-particle spacing, the dielectric properties of metal and the surrounding medium, the temperature dependence of LSPR is not well understood. By thermally annealing gold nanoparticle arrays formed by nanosphere lithography, a shift of LSPR peak upon heating has been shown. The thermal characteristics of the plasmonic nanoparticles have been further used …
Placing Birds On A Dynamic Evolutionary Map: Using Digital Tools To Update The Evolutionary Metaphor Of The "Tree Of Life", Sonia Stephens
Placing Birds On A Dynamic Evolutionary Map: Using Digital Tools To Update The Evolutionary Metaphor Of The "Tree Of Life", Sonia Stephens
Electronic Theses and Dissertations
This dissertation describes and presents a new type of interactive visualization for communicating about evolutionary biology, the dynamic evolutionary map. This web-based tool utilizes a novel map-based metaphor to visualize evolution, rather than the traditional "tree of life." The dissertation begins with an analysis of the conceptual affordances of the traditional tree of life as the dominant metaphor for evolution. Next, theories from digital media, visualization, and cognitive science research are synthesized to support the assertion that digital media tools can extend the types of visual metaphors we use in science communication in order to overcome conceptual limitations of traditional …
The Effect Of Visualized Student's Self-Set Learning Progress Goals On East Asian Chinese Student's Motivation And Self Confidence In Learning, Yu Ao
Electronic Theses and Dissertations
This study was conducted to determine if visualized goal achievement can help enhance East Asian Chinese students‟ motivation in learning and elevate their confidence in reaching their goals thus improving their performance. The goal achievement was visualized on a goal achievement progress chart that was self-created and self-managed by the East Asian Chinese students and the goal creating was under the supervision of their instructor. In this study, literature reviews on the theories, previous research studies in the perspectives of East Asian students‟ motivation in learning, goal setting on motivation, self-determination, self-efficacy, and expectancy theories are conducted to provide theoretical …
Age As A Factor In Inter-Tissue Spacing Of Stable Carbon Isotope Values In Juvenile Human Remains From The Dakhleh Oasis, Egypt, Annie Laurie Norris
Age As A Factor In Inter-Tissue Spacing Of Stable Carbon Isotope Values In Juvenile Human Remains From The Dakhleh Oasis, Egypt, Annie Laurie Norris
Electronic Theses and Dissertations
Although stable isotope analysis is routinely utilized in bioarchaeology and relies on principles that are well-understood, there are still fundamental issues that have not been thoroughly investigated. This thesis examines the relationship between inter-tissue spacing of carbon stable isotope values (δ13C) and age in juvenile human remains. Analyses of tissues within the same individual reveal disparate isotopic values for a variety of physiological and biological reasons discussed herein. This project examines the distance between the δ13C values in bone collagen, skin, hair, and nail, and examines how these distances vary between different age groups, utilizing data collected from 52 well-preserved …
Prescription Drug Misuse Among College Students: An Examination Of Sociological Risk Factors, William C. Watkins
Prescription Drug Misuse Among College Students: An Examination Of Sociological Risk Factors, William C. Watkins
Electronic Theses and Dissertations
Prescription drug misuse (PDM), defined as use without a prescription or solely for the feeling or experience caused by the drug, has become a popular topic among substance use researchers. While the vast majority of studies on the topic tackle epidemiological questions surrounding PDM, there is a notable lack of studies that look specifically at risk factors rooted in sociological/criminological theories. The current research seeks to bridge this gap in the literature by examining theoretically based explanations for PDM among college students utilizing three criminological theories commonly applied to other forms of substance use: Social Learning Theory, Social Bonding/Control theory, …
Biochemical Studies Of Abce1, Lynn Sims
Biochemical Studies Of Abce1, Lynn Sims
Electronic Theses and Dissertations
The growth and survival of all cells require functional ribosomes that are capable of protein synthesis. The disruption of the steps required for the function of ribosomes represents a potential future target for pharmacological anti-cancer therapy. ABCE1 is an essential Fe-S protein involved in ribosomal function and is vital for protein synthesis and cell survival. Thus, ABCE1 is potentially a great therapeutic target for cancer treatment. Previously, cell biological, genetic, and structural studies uncovered the general importance of ABCE1, although the exact function of the Fe-S clusters was previously unclear, only a simple structural role was suggested. Additionally, due to …
Match Between Parent And Child Temperament: Implications For Parenting Behaviors And Children's Behavior Problems, Melissa Middleton
Match Between Parent And Child Temperament: Implications For Parenting Behaviors And Children's Behavior Problems, Melissa Middleton
Electronic Theses and Dissertations
To examine the relationships among the match between parent and child temperament, parenting behaviors, parenting stress, and young children's behavior problems, the current study investigated the responses of mothers who are raising children between the ages of 3- and 5-years. Mothers completed the Dimensions of Temperament Scale-Revised for Children (Windle & Learner, 1986), the Dimensions of Temperament Scale-Revised for Adults (Windle & Learner, 1986), the Alabama Parenting Questionnaire-Preschool Revision (Clerkin, Marks, Policaro, & Halperin, 2007), the Maternal Emotional Styles Questionnaire (Lagace-Seguin & Coplan, 2005), the Parenting Stress Index-Short Form (Abidin, 1995), and the Child Behavior Checklist (Achenbach & Rescorla, 2000, …
Effect Of Predation Risk And Food Availability On Parental Care And Nest Survival In Suburban And Wildland Florida Scrub-Jays, Joseph M. Niederhauser
Effect Of Predation Risk And Food Availability On Parental Care And Nest Survival In Suburban And Wildland Florida Scrub-Jays, Joseph M. Niederhauser
Electronic Theses and Dissertations
Individual organisms often use cues from their natural environments to determine many behavioral and life-history "decisions." These "decisions" are usually adaptive, i.e. a response to selection, because the environmental cues on which they are based reliably correlate with increased fitness over time. When the selected behavioral response to a natural cue no longer provides a fitness benefit, then selection for a new response may occur but individuals maintaining the previously selected response may suffer reduced survival and reproduction. Especially in human-modified landscapes individuals making a maladaptive behavioral or life-history choice based on those formerly reliable environmental cues may be faced …
Fine-Scale Geographic Variation Of Stable Isotope And Fatty Acid Signatures Of Three Fish Species In The Indian River Lagoon, Fl, Jennifer Fletcher Odom
Fine-Scale Geographic Variation Of Stable Isotope And Fatty Acid Signatures Of Three Fish Species In The Indian River Lagoon, Fl, Jennifer Fletcher Odom
Electronic Theses and Dissertations
The Indian River Lagoon, Florida, is a unique closed “bar built” estuary system that has little interchange with the Atlantic Ocean and which is home to many resident species. Three fish species were investigated to see if their isotopic and fatty acid signatures differed based on geographic location. The goal was to assess the degree of resolution of spatial variation that is possible when using stable isotope and fatty acid signature analysis to interpret feeding habits and potential linkages between feeding habits and health status. Spotted seatrout (n=40), pinfish (n=60) and white mullet (n=60) were collected over a 4 week …
Optical Fluid-Based Photonic And Display Devices, Su Xu
Optical Fluid-Based Photonic And Display Devices, Su Xu
Electronic Theses and Dissertations
Conventional solid-state photonic devices exhibit an ultra-high optical performance and durability, but minimal adaptability. Recently, optical fluid-based photonic and display devices are emerging. By dynamically manipulating the optical interface formed by liquids, the optical output can be reconfigured or adaptively tuned in real time. Such devices exhibit some unique characteristics that are not achievable in conventional solid-state photonic devices. Therefore, they open a gateway for new applications, such as image and signal processing, optical communication, sensing, and lab-on-a-chip, etc. Different operation principles of optical fluidbased photonic devices have been proposed, for instance fluidic pressure, electrochemistry, thermal effect, environmentally adaptive hydrogel, …
Nonlinear Dynamic Modeling, Simulation And Characterization Of The Mesoscale Neuron-Electrode Interface, Vaibhav Thakore
Nonlinear Dynamic Modeling, Simulation And Characterization Of The Mesoscale Neuron-Electrode Interface, Vaibhav Thakore
Electronic Theses and Dissertations
Extracellular neuroelectronic interfacing has important applications in the fields of neural prosthetics, biological computation and whole-cell biosensing for drug screening and toxin detection. While the field of neuroelectronic interfacing holds great promise, the recording of high-fidelity signals from extracellular devices has long suffered from the problem of low signal-to-noise ratios and changes in signal shapes due to the presence of highly dispersive dielectric medium in the neuron-microelectrode cleft. This has made it difficult to correlate the extracellularly recorded signals with the intracellular signals recorded using conventional patch-clamp electrophysiology. For bringing about an improvement in the signalto-noise ratio of the signals …
An Exploratory Study Of Physiologic Responses To A Passive Exercise Intervention In Mechanically-Ventilated Critically Ill Adults, Christina M. Amidei
An Exploratory Study Of Physiologic Responses To A Passive Exercise Intervention In Mechanically-Ventilated Critically Ill Adults, Christina M. Amidei
Electronic Theses and Dissertations
Muscle weakness is the most common and persistent problem after a critical illness. Early mobilization of the critically ill patient, beginning with passive exercise and progressing to ambulation, may mitigate muscle effects of the critical illness. However, mobilization may produce adverse effects, especially early in the illness when risk for physiologic deterioration is common. If safe, introducing a mobility intervention early in the illness may facilitate ventilator weaning, shorten intensive care unit and hospitals stays, and improve functional status and quality of life for mechanically ventilated critically ill patients. The aim of this study was assess the cardiopulmonary and inflammatory …
Signals Delivered By Interleukin-7 Regulate The Activities Of Bim And Jund In T Lymphocytes, Shannon Moore Ruppert
Signals Delivered By Interleukin-7 Regulate The Activities Of Bim And Jund In T Lymphocytes, Shannon Moore Ruppert
Electronic Theses and Dissertations
Interleukin-7 (IL-7) is an essential cytokine for lymphocyte growth that has the potential for promoting proliferation and survival. While the survival and proliferative functions of IL-7 are well established, the identities of IL-7 signaling components in pathways other than JAK/STAT, that accomplish these tasks remain poorly defined. To this end, we used IL-7 dependent T-cells to examine those components necessary for cell growth and survival. Our studies revealed two novel signal transducers of the IL-7 growth signal: BimL and JunD. IL-7 promoted the activity of JNK (Jun N-terminal Kinase), and that JNK, in turn, drove the expression of JunD, a …
Photochemistry And Applications Of Diels-Alder Adducts And Photoacids In Materials Science, Valentine Johns
Photochemistry And Applications Of Diels-Alder Adducts And Photoacids In Materials Science, Valentine Johns
Electronic Theses and Dissertations
In chapter I Photo-retro-Diels-Alder (PrDA) reactions of a variety of Diels Alder (DA) adducts were studied. Experimental results showed that the photoreactivity (quantum yield) depends on the electron-donating ability of the diene component and the electronwithdrawing ability of the dienophile component. The mechanism was studied by trapping the reaction intermediate, O2 quenching and femtosecond time-resolved absorption spectroscopy. All the results support a mechanism that involves a charge-separated intermediate generated from a singlet excited state. The PrDA reaction may find applications in photoresponsive materials, photolithography, drug delivery and mechanistic research. Chapter II shows two applications of the PrDA reaction. The first, …
White And Black Womanhoods And Their Representations In 1920s American Advertising, Lindsey L. Turnbull
White And Black Womanhoods And Their Representations In 1920s American Advertising, Lindsey L. Turnbull
Electronic Theses and Dissertations
The 1920s represented a time of tension in America. Throughout the decade, marginalized groups created competing versions of a proper citizen. African-Americans sought to be included in the national fabric. Racism encouraged solidarity, but black Americans did not agree upon one method for coping with, and hopefully ending, antiblack racism. White women enjoyed new privileges and took on more roles in the public sphere. Reactionary groups like the Ku Klux Klan found these new voices unsettling and worrisome and celebrated a white, nativeborn, Protestant and male vision of the American citizen. Simultaneously, technological innovations allowed for advertising to flourish and …
Dispersal, Gene Flow, And Adaptive Evolution During Invasion: Testing Range-Limit Theory With The Asian Tiger Mosquito, Kimberly Medley
Dispersal, Gene Flow, And Adaptive Evolution During Invasion: Testing Range-Limit Theory With The Asian Tiger Mosquito, Kimberly Medley
Electronic Theses and Dissertations
Understanding the factors that make non-native species successful invaders is an important step towards mitigating spread. At the same time, species invasions can serve as natural experiments to test range-limit theory. Range-limit theory postulates declines in local abundance (abundant center model) and genetic diversity (central-peripheral hypothesis) towards range edges because of underlying environmental gradients. Such declines constrain adaptation to marginal habitats via gene swamping. However, broader evolutionary theory predicts intermediate rates of immigration into range-edge populations can relieve genetic drift and improve adaptive potential. I tested hypotheses generated from theory while illuminating aspects affecting of the invasion of the Asian …
Gender Bias In The Technical Disciplines, Jessica Lynn Campbell
Gender Bias In The Technical Disciplines, Jessica Lynn Campbell
Electronic Theses and Dissertations
This study investigates how women are affected by gender bias in the workplace. Despite the increasing numbers of women in the workforce, women are still under-represented and under-valued in workplaces, which, in part, is due to their gender stereotype. This study demonstrates how gender bias in the workplace has been proven to limit women in their careers and potential in their occupational roles. The media’s negative depiction of women in their gender stereotype reinforces and perpetuates this image as a cultural norm in society. Women both conform and are judged and evaluated according to their weak and submissive gender stereotype. …
Examining Gender In Pharmaceutical Rhetoric Through A Cultural Studies Lens: A Case Study On The Gardasil Vaccine, Jennifer Fickley-Baker
Examining Gender In Pharmaceutical Rhetoric Through A Cultural Studies Lens: A Case Study On The Gardasil Vaccine, Jennifer Fickley-Baker
Electronic Theses and Dissertations
On June 8, 2006, Merck announced the debut of Gardasil, the world's first vaccine found successful in preventing human papillomavirus (HPV) infections, a sexually transmitted infection that is one of the main causes of certain cancers in men and women, including cervical, vulvar, penile and anal cancers. To promote the vaccine's release, Merck launched Gardasil's "One Less" advertising campaign that included television commercials, print ads and a consumerfocused website (www.Gardasil.com), each promoting the message that "you" could now be "one less woman" affected by cervical cancer ("One Less" campaign). The vaccine, tested and approved only for females age 9-26, was …
The Foods And Crops Of The Muisca: A Dietary Reconstruction Of The Intermediate Chiefdoms Of Bogota (Bacata) And Tunja (Hunza), Colombia, Jorge Luis Garcia
The Foods And Crops Of The Muisca: A Dietary Reconstruction Of The Intermediate Chiefdoms Of Bogota (Bacata) And Tunja (Hunza), Colombia, Jorge Luis Garcia
Electronic Theses and Dissertations
The Muisca people of the Eastern Cordillera of Colombia had an exceptionally complex diet, which is the result of specific subsistence strategies, environmental advantages, and social restrictions. The distinct varieties of microclimates, caused by the sharp elevations in this part of the Andes, allows for a great biodiversity of plants and animals that was accessible to the native population. The crops of domesticated and adopted plants of the Muisca include a wide variety of tubers, cereals, fruits, and leaves that are described in detail in this thesis. The Muisca used an agricultural method known as microverticality where the different thermic …
Educating Gifted Students With Asperger's Syndrome: A Case Study Of Three Students And Their Classroom Experiences, Beverly S. Horn
Educating Gifted Students With Asperger's Syndrome: A Case Study Of Three Students And Their Classroom Experiences, Beverly S. Horn
Electronic Theses and Dissertations
Much research has focused on students with Asperger’s Syndrome (AS), and much research has also been done on gifted students with special needs, yet very little has been published that looks at the characteristics of students who have been identified as both Gifted and as having Asperger Syndrome (G/AS), and what teachers are doing in the classroom to meet their needs. This is an important topic because this group of twice exceptional students has characteristics of both exceptionalities, and trying to meet the special needs of both groups in the same classroom would likely be a challenge for the teacher. …
Stable Isotopes And Multiple Tissue Analysis: Reconstructing Life Histories For Individuals From Dakhleh Oasis, Egypt, Noel Johns
Electronic Theses and Dissertations
Stable isotope analysis is often used to evaluate elements of the lives of past peoples, such as diet and health status, at a societal level. Analysis at an individual level is exceptionally rare, and has not been conducted using a variety of tissues representing both early life and life approximate to death. In this study, δ 13C and δ15N isotope signatures are used to create life histories for single individuals from Romano-Christian period Kellis 2 cemetery in the Dakhleh Oasis, Egypt. Samples are obtained from several different tissues, including tooth dentin, bone collagen, hair, nail, skin, and gut content, all …
Deconstructing Disability, Assistive Technology: Secondary Orality, The Path To Universal Access, Tara Prakash Tripathi
Deconstructing Disability, Assistive Technology: Secondary Orality, The Path To Universal Access, Tara Prakash Tripathi
Electronic Theses and Dissertations
When Thomas Edison applied for a patent for his phonograph, he listed the talking books for the blind as one of the benefits of his invention. Edison was correct in his claim about talking books or audio books. Audio books have immensely helped the blind to achieve their academic and professional goals. Blind and visually impaired people have also been using audio books for pleasure reading. But several studies have demonstrated the benefits of audio books for people who are not defined as disabled. Many nondisabled people listen to audio books and take advantage of speech based technology, such as …
Classroom Based Substance Use Prevention Programs: A Meta-Analysis, Alyssa R. Boucher
Classroom Based Substance Use Prevention Programs: A Meta-Analysis, Alyssa R. Boucher
Electronic Theses and Dissertations
This paper reports on a meta-analysis performed on forty one studies evaluating classroom-based substance abuse primary prevention programs. Studies included were delivered in a classroom to the general student body, had a primary focus of substance abuse prevention, measured behavior change, and were published in peer-reviewed outlets between 2000 and 2011. Comprehensive Meta-Analysis was used to calculate a random effects Cohen’s d and moderator analyses. Results indicated a significant effect for alcohol (d=0.10) and tobacco (d=0.09) in multi-target interventions. Specific program components and characteristics associated with more effective prevention programs are discussed. Despite the best efforts of those who develop …
The Impact Of Timed Versus Untimed Standardized Tests On Reading Scores Of Third Grade Students In Title I Schools, Ruth Elizabeth Haniff
The Impact Of Timed Versus Untimed Standardized Tests On Reading Scores Of Third Grade Students In Title I Schools, Ruth Elizabeth Haniff
Electronic Theses and Dissertations
The purpose of this study was to investigate the extent to which the performance of Title I third grade students in a central Florida School District differed on tests administered under timed and untimed conditions. Further examined was the literature on reasons for the achievement gap which centered around seven different themes: (a) standardized testing, (b) achievement gap data and identified factors (c) deficit theory, (d) cultural mismatch theory, (e) extended time accommodations, (f) test anxiety and stress, and (g) timed versus untimed tests. Six Title I schools participated in this study by assigning 194 students to take the 2006 …
Foreclosures And Crime: Testing Social Disorganization Theory In The Suburbs, Sara Hoskin
Foreclosures And Crime: Testing Social Disorganization Theory In The Suburbs, Sara Hoskin
Electronic Theses and Dissertations
Foreclosures have increased in the US since the 1970’s. The increase in foreclosures has caused concern among some researchers on their affect on crime. Social disorganization theory measures the effect various structural characteristics, such as poverty, residential instability/mobility, racial/ethnic heterogeneity, and family disruption have on crime. This study, though, is concerned with residential instability/mobility, or the presence of foreclosed houses in neighborhoods. Although most studies using this theory look at low-income neighborhoods, the following research looks at middle- and upper-income neighborhoods, which have been greatly affected by foreclosures. The theory also argues that the level of collective efficacy can reduce …
Comorbidity Of Psychopathy In Schizotypy: Skin Conductance To Affective Pictures, Kathleen A. Ragsdale
Comorbidity Of Psychopathy In Schizotypy: Skin Conductance To Affective Pictures, Kathleen A. Ragsdale
Electronic Theses and Dissertations
Prior research substantiates a relationship between psychopathy and schizophrenia-spectrum disorders, which has begun to elucidate why some individuals with schizophrenia are violent. Unfortunately, this relationship has been limited to self-report. To objectively corroborate this finding, undergraduate students were recruited from an online screening administration of the Schizotypal Personality Questionnaire. This resulted in 56 participants (52% male) with a mean age of 20.37 (SD = 4.74) and a wide range of schizotypy scores who participated in the experiment. Following completion of self-report measures, participants viewed 15 pictures (five neutral, five threatening, and five of others in distress) from the International Affective …
Examination Of An Online College Mathematics Course: Correlation Between Learning Styles And Student Achievement, Bridget Steele
Examination Of An Online College Mathematics Course: Correlation Between Learning Styles And Student Achievement, Bridget Steele
Electronic Theses and Dissertations
The purpose of this study was to determine if there was a significant relationship between learning styles and student learning outcomes in an online college mathematics course. Specifically, the study was guided by two research questions focused on (a) the extent to which learning styles had a predictive relationship with student achievement in an online college mathematics course and (b) the extent to which various learning styles among mathematics students in online versus face-to-face courses predicted mathematics achievement. The population for this study consisted of the 779 college mathematics and algebra (CMA) students who were enrolled in a private multimedia …
The Effects Of Phosphatidylserine On Reaction Time And Cognitive Function Following An Exercise Stress, Adam John Wells
The Effects Of Phosphatidylserine On Reaction Time And Cognitive Function Following An Exercise Stress, Adam John Wells
Electronic Theses and Dissertations
Phosphatidylserine (PS) is an endogenously occurring phospholipid that has been shown to have cognition and mood enhancing properties in humans, possibly through its role as an enzyme co-factor in cellular signal transduction. Specifically, PS has been identified as activator of classical isoforms of protein kinase C, an enzyme known to be involved in the growth and differentiation of neural cells, and is therefore thought to play a role in the protection of neurons. The purpose of this study was to examine the effects of supplementation with PS and caffeine on measures of cognition, reaction time and mood prior to and …
Phosphatidic Acid Increases Lean Body Tissue And Strength In Resistance Trained Men, David Williams
Phosphatidic Acid Increases Lean Body Tissue And Strength In Resistance Trained Men, David Williams
Electronic Theses and Dissertations
Phosphatidic Acid (PA) is a natural phospholipid compound derived from lecithin which is commonly found in egg yolk, grains, fish, soybeans, peanuts and yeast. It has been suggested that PA is involved in several intracellular processes associated with muscle hypertrophy. Specifically, PA has been reported to activate protein synthesis through the mammalian target of rapamycin (mTOR) signaling pathway and thereby may enhance the anabolic effects of resistance training. To our knowledge, no one has examined the effect of PA supplementation in humans while undergoing a progressive resistance training program. To examine the effect of PA supplementation on lean soft tissue …