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Non-Dispersive Infrared (Ndir) Gas Sensor Utilizing Light-Emitting-Diodes Suitable For Applications Demanding Low-Power And Lightweight Instruments, Kyle Thurmond
Electronic Theses and Dissertations
Gas sensors that are low-power, light-weight, and rugged, while also remaining low-cost, have considerable appeal to areas from automotive to space flight. There are increasing demands for higher efficient vehicles with lower emissions in order meet regulations that are meant to mitigate or lessen the effects of climate change. An affordable, fast response sensor that can measure transient carbon monoxide (CO) and carbon dioxide (CO2) has broad application which can lead to more efficient, fuel flexible engines and regulations of harmful emissions. With compact, economical, low-power sensors that are able to continually monitor gases that are characteristic of burning materials, …
Weight Discrimination Through Social Networking Sites: The Moderating Effects Of Gender, Stereotype-Consistent Behavior, And Occupational Setting, Bridget Mchugh
Electronic Theses and Dissertations
As the use of social networking sites (SNSs) in hiring increases, human resources professionals have become concerned with the increased probability of discriminatory hiring decisions. At the same time, there is increasing evidence that discrimination towards overweight and obese applicants has risen in the past decade. The present study addressed these concerns by examining the impact of an applicant's weight in a SNS profile picture on the decision to hire the applicant for a sales position. The impact of the applicant's gender, body mass index, and stereotype-consistent behaviors on hiring intentions were examined. In addition, the type of sales position …
Biophysical Sources Of 1/F Noises In Neurological Tissue, Alan Paris
Biophysical Sources Of 1/F Noises In Neurological Tissue, Alan Paris
Electronic Theses and Dissertations
High levels of random noise are a defining characteristic of neurological signals at all levels, from individual neurons up to electroencephalograms (EEG). These random signals degrade the performance of many methods of neuroengineering and medical neuroscience. Understanding this noise also is essential for applications such as real-time brain-computer interfaces (BCIs), which must make accurate control decisions from very short data epochs. The major type of neurological noise is of the so-called 1/f-type, whose origins and statistical nature has remained unexplained for decades. This research provides the first simple explanation of 1/f-type neurological noise based on biophysical fundamentals. In addition, noise …
Remote Sensing Of Coastal Wetlands: Long Term Vegetation Stress Assessment And Data Enhancement Technique, Subrina Tahsin
Remote Sensing Of Coastal Wetlands: Long Term Vegetation Stress Assessment And Data Enhancement Technique, Subrina Tahsin
Electronic Theses and Dissertations
Apalachicola Bay in the Florida panhandle is home to a rich variety of salt water and freshwater wetlands but unfortunately is also subject to a wide range of hydrologic extreme events. Extreme hydrologic events such as hurricanes and droughts continuously threaten the area. The impact of hurricane and drought on both fresh and salt water wetlands was investigated over the time period from 2000 to 2015 in Apalachicola Bay using spatio-temporal changes in the Landsat based NDVI. Results indicate that salt water wetlands were more resilient than fresh water wetlands. Results also suggest that in response to hurricanes, the coastal …
A Contextual Approach To Real Time, Interactive Narrative Generation, James Hollister
A Contextual Approach To Real Time, Interactive Narrative Generation, James Hollister
Electronic Theses and Dissertations
Oral story telling has become a lost art of family histories because social media and technology have taken over the personal interactions that once passed on the important stories and facts from generation to generation. This dissertation presents and evaluates a method of generating a narrative with input from the listener without actually forcing him or her to become an actual character in the narrative. This system is called CAMPFIRE Story Telling System (STS) and employs a contextual approach to story generation. This system uses the Cooperating Context Method (CCM) to generate and tell dynamic stories in real time and …
Modeling Wastewater Indicators And Effects Of Contaminant Removal Strategies On Groundwater And Spring Discharge In A Karst Aquifer, Erin Reed
Electronic Theses and Dissertations
This dissertation reports on research related to groundwater and contaminant transport to the Volusia Blue Spring (VBS), an Outstanding Florida Water Body located in Volusia County (Florida). The integration of springshed water quality and contaminant fate and transport (CFT) modeling played key roles in the evaluation of anthropogenic recharge impacts on VBS. To study anthropogenic recharge into the karst limestone aquifer, wastewater effluent, golf course ponds, septic tanks, groundwater monitoring wells, and VBS discharge were sampled for boron, nitrate-nitrogen, nitrate-oxygen and their isotopes spatially throughout the VBS springshed. Data related to natural water features, rainfall, land use, water use, treated …
Evaluation Of Crash Modification Factors And Functions Including Time Trends At Intersections, Jung-Han Wang
Evaluation Of Crash Modification Factors And Functions Including Time Trends At Intersections, Jung-Han Wang
Electronic Theses and Dissertations
Traffic demand has increased as population increased. The US population reached 313,914,040 in 2012 (US Census Bureau, 2015). Increased travel demand may have potential impact on roadway safety and the operational characteristics of roadways. Total crashes and injury crashes at intersections accounted for 40% and 44% of traffic crashes, respectively, on US roadways in 2007 according to the Intersection Safety Issue Brief (FHWA, 2009). Traffic researchers and engineers have developed a quantitative measure of the safety effectiveness of treatments in the form of crash modification factors (CMF). Based on CMFs from multiple studies, the Highway Safety Manual (HSM) Part D …
From Turkeys To Tamales: Paleoindian To Preclassic Period Faunal Use At Maya Hak Cab Pek Rockshelter In Southern Belize, Stephanie Raye Orsini
From Turkeys To Tamales: Paleoindian To Preclassic Period Faunal Use At Maya Hak Cab Pek Rockshelter In Southern Belize, Stephanie Raye Orsini
Electronic Theses and Dissertations
Very little is known about Paleoindian and Archaic subsistence strategies of the people of Mesoamerica prior to the development of ceramics. Rockshelters with good preservation and stratigraphic deposits can provide excellent contexts for a comparative faunal analysis though time. In February of 2014 the Bladen Paleoindian and Archaic Project (BPAP), directed by Dr. Keith Prufer, began excavations at the rockshelter Maya Hak Cab Pek (MHCP). The site has evidence for human activities from the Paleoindian period (11,500 BC to 8,000 BC) through the Preclassic Maya period (2,000 BC to AD 250). This research uses zooarchaeological analysis to investigate animal use …
Social Dimensions Of Alzheimer’S Disease Among Caregivers In Oaxaca, Mexico, Jonathan Yahalom
Social Dimensions Of Alzheimer’S Disease Among Caregivers In Oaxaca, Mexico, Jonathan Yahalom
Electronic Theses and Dissertations
This dissertation provides an analysis of the social construction of Alzheimer’s disease within Teotitlán del Valle, a rural Zapotec-speaking community in Oaxaca, Mexico. It explores how Alzheimer’s disease is locally understood, how this understanding reconfigures traditional meanings of old age, and how broader social issues are negotiated through this reconfiguration. Through 10 months of fieldwork this dissertation draws on ethnographic observations and interviews with 22 family caregivers across 9 households. This study is noteworthy for being the first known investigation in Teotitlán whose primary data was collected in the Zapotec language. Further, this dissertation integrates methods across psychology, gerontology, and …
Variation In The Amphibian Hypothalamic Pituitary Adrenal Axis: Patterns, Mechanisms, And Implications, Jessica Thomas
Variation In The Amphibian Hypothalamic Pituitary Adrenal Axis: Patterns, Mechanisms, And Implications, Jessica Thomas
Electronic Theses and Dissertations
Many vertebrate stress responses are mediated by the hypothalamic-pituitary-adrenal/interrenal (HPA/I) axis, which involves hypothalamic secretion of corticotropin releasing factor (CRF) and increased plasma levels of glucocorticoid hormones (GCs) like corticosterone (CORT). Basal HPA/I activity is also imperative to maintaining homeostasis. Despite having crucial roles, HPA/I activity is variable and can be influenced by factors like environment, physiology, and life-history. HPA/I activity also influences reproduction and immunity. To better understand patterns of HPA/I variation (specifically CORT and CRF), we conducted several studies using plethodontid salamanders. Their low-energy lifestyle offers unique contrast to studies of stress physiology in high-energy animals like mammals …
An Examination Of Pre-Service Mathematics Teachers' Integration Of Technology Into Instructional Activities Using A Cognitive Demand Perspective And Levels Of Technology Implementation, Ahmet Oguz Akcay
Electronic Theses and Dissertations
Technology has changed every aspect of our lives such as communication, shopping, games, business, and education. Technology has been used for decades in the teaching and learning environment in K-12 education and higher education, especially in mathematics education where the use of instructional technology has great potential. Today's students have grown up in the technology era, so our education system should consider this situation before developing curriculum and instructional strategies. Technology can increase the quality of mathematical investigations, portray meaningful mathematical ideas to students and teachers from multiple perspectives, and change traditional ways of doing mathematics (NCTM, 2000). According to …
The Social Obligation To Reduce Stigma In Order To Increase Utilization Of Mental Health Services, Melissa Sue Berdell
The Social Obligation To Reduce Stigma In Order To Increase Utilization Of Mental Health Services, Melissa Sue Berdell
Electronic Theses and Dissertations
Many mental health organizations have developed campaigns that concentrate on reducing the stigma towards mental health with the intentions of increasing access and utilization for people with mental illnesses that are not receiving appropriate mental health services. The mental health campaigns predominantly focus on establishing awareness and education related to the number of people with mental illnesses and diagnoses so that people will not be ashamed or embarrassed to have mental illnesses or access mental health treatments. However, societal prejudices have caused many people diagnosed with mental illnesses to lose jobs, homes, and families; therefore, in general, people are afraid …
Metabolomics Of Mammalian And Cellular Models Of Aging, Nathan Gonzales Duval
Metabolomics Of Mammalian And Cellular Models Of Aging, Nathan Gonzales Duval
Electronic Theses and Dissertations
Aging is often associated with impaired cognition and a progressive loss of organ function over time accompanied by an increased susceptibility for many disorders, including Alzheimer's disease (AD), Parkinson's disease (PD), heart disease, osteoporosis, type II diabetes, and many forms of cancer. With a rapidly aging population, the negative impacts of aging and age-related disorders is a major cause of increased human suffering both for affected individuals and for families and caregivers. Metabolic changes are also apparent in normal aging, but may increase in magnitude or nature with accompanying disease states or with accelerated aging. Thus, studying aging in a …
Exploring New Chemical Entities From Traditional Medicine: Docking, Synthesis And Specific Bioactivities, Chinni Yalamanchili
Exploring New Chemical Entities From Traditional Medicine: Docking, Synthesis And Specific Bioactivities, Chinni Yalamanchili
Electronic Theses and Dissertations
Traditional medical systems contributed significantly to medicine with a number of their phytochemicals found to possess good biological properties. Recently, Dr. Youyou Tu was awarded the Nobel Prize (2015) for her discovery/isolation of Artemisinin from the TCM plant Artemisia annua. Our first aim is to identify active phytochemicals against botulinum neurotoxin A (BoNT/A), and diabetes from Ayurveda and TCM, respectively, by using in silico, in vitro and in vivo approaches. In our second aim, we wanted to enantioselectively synthesize scalable quantities of phytoestrogenic isoflavans such as equol and sativan. The following three chapters summarize results of the three research goals. …
Brim House, Amie Irwin
Brim House, Amie Irwin
Electronic Theses and Dissertations
Brim House explores the abstract and ever changing realities of motherhood in a broken world, and in a hot, Mississippi summer.
Computation Of Acoustic Ressure Fields Produced In Feline Brain By High-Intensity Focused Ultrasound, Nazanin Omidi
Computation Of Acoustic Ressure Fields Produced In Feline Brain By High-Intensity Focused Ultrasound, Nazanin Omidi
Electronic Theses and Dissertations
In 1975, Dunn et al. (Jasa 58:512-514) shothat a simple relation describes the ultrasonic threshold for cavitation induced changes in the mammalian brain. The thresholds for tissue damage were estimated for a variety of acoustic parameters in exposed feline brain. The goal of this study was to improve the estimates for acoustic pressures and intensities present in vivo during those experimental exposures by estimating them using nonlinear rather than linear theory. In our current project, the acoustic pressure waveforms produced in the brains of anesthetized felines were numerically simulated for a spherically focused, nominally f1-transducer (focal length = 13 cm) …
How Can A Focus On The Ethical Notions Of Dignity And Respect For Autonomy Help To Improve Healthcare For Elderly People In Islamic Countries?, Abeer Alamri
Electronic Theses and Dissertations
The purpose of this dissertation is to identify how can a focus on the ethical notion of dignity and respect for autonomy help to improve health care for elderly people in Islamic countries. An ethic for aging relies on the principle that the losses of age do not detract from a person's essential autonomy. Thus, care should be provided without assuming that older people are different from those of other ages. It is possible to determine that ethical values are similar in Islamic cultures as well as, Western countries. But these values are often neglected when people face the need …
Hot-Melt Extrusion: A Versatile Pharmaceutical Technology, Hemlata Patil
Hot-Melt Extrusion: A Versatile Pharmaceutical Technology, Hemlata Patil
Electronic Theses and Dissertations
Hot-melt extrusion (HME) is a promising technology for the production of new chemical entities in the developmental pipeline and for improving products already on the market. The first objective of this research work was to describe a continuous process for the production of solid lipid nanoparticles (SLN) as drug-carrier systems via hot-melt extrusion (HME) using Quality by Design (QbD) principles. Fenofibrate SLN were prepared by combining two processes: HME technology for melt-emulsification and high-pressure homogenization (HPH) for size reduction. Varying the process parameters enabled the production of SLN below 200 nm. At the end of a 5-h in-vitro dissolution study, …
Maternal Melodrama And Modern Horror: Genre Hybridity In Southern Film, Sara Marcella Williams
Maternal Melodrama And Modern Horror: Genre Hybridity In Southern Film, Sara Marcella Williams
Electronic Theses and Dissertations
This dissertation establishes the groundwork for a new genre of Southern film – a hybrid genre that I call Southern maternal horror. By integrating key elements from the genres of maternal melodrama and modern horror into Southern narratives, Southern maternal horror uses the central ambivalence found in both genres – manifesting as a desire to both return to and escape from one’s maternal origins – to challenge Southern nostalgia. Specifically, within its distinctly Southern framework, this hybrid genre frequently disrupts the romanticized notions of the Old South typically found in classic Southern films such as Gone With the Wind: idealizations …
A Multi-Scale Approach To Study Solid Oxide Fuel Cells: From Mechanical Properties And Crystal Structure Of The Cell's Materials To The Development Of An Interactive And Interconnected Educational Tool, Amjad Aman
Electronic Theses and Dissertations
Solid Oxide Fuel Cells are energy conversion devices that convert chemical energy of a fuel directly into electrical energy. They are known for being fuel-flexible, have minimal harmful emissions, ideal for combined heat and power applications, highly energy-efficient when combined with gas or steam turbines. The current challenges facing the widespread adoption these fuel cells include cost reduction, long-term testing of fully integrated systems, improving the fuel cell stack and system performance, and studies related to reliability, robustness and durability. The goal of this dissertation is to further the understanding of the mechanical properties and crystal structure of materials used …
A Comparison Of Shovel Testing And Surface Collection As Archaeological Site Discovery Methods: A Case Study Using Mississippian Farmsteads, Cameron Smith Howell
A Comparison Of Shovel Testing And Surface Collection As Archaeological Site Discovery Methods: A Case Study Using Mississippian Farmsteads, Cameron Smith Howell
Electronic Theses and Dissertations
Shovel testing and controlled surface collection are commethods of archaeological site investigation that are generally approved by state and federal agencies as well as the academic community for cultural resource management projects and research. While both techniques are equally utilized, little research has been conducted on how equivalent these techniques are in terms of their efficacy for finding site. This thesis seeks to find a way to compare these techniques by creating mathematical models to describe how well the methods behave when tested on known datasets generated from Mississippian period farmsteads. The predicted performance can then be compared to real …
Linearly Stressed To Death: Consideration Of Early Childhood Stress As A Main Contributor To The Regional Variability In Classic Maya Mortuary Profiles, Nicholas Billstrand
Linearly Stressed To Death: Consideration Of Early Childhood Stress As A Main Contributor To The Regional Variability In Classic Maya Mortuary Profiles, Nicholas Billstrand
Electronic Theses and Dissertations
The Late and Terminal Classic periods were times of great social, economic, and political change in Maya civilization. Scholars have suggested that increasing levels of dietary stress during this time may have been the result of ecological instability, drought, warfare, and significant levels of population movement across the Maya lowlands. All of these processes may have affected human health and left measurable markers of stress in human skeletal material. The burial population recovered from two sites on Ambergris Caye, located near the coast of Belize, have significantly more sub-adult individuals than sites in inland Belize, such as Actuncan, suggesting the …
Intermediate Russian Through Formula Tales, Tamar Karakozova
Intermediate Russian Through Formula Tales, Tamar Karakozova
Electronic Theses and Dissertations
The dissertation presents a study of on the benefits of formula tales in university-level foreign language classrooms during grammar practice activities. The study investigates students’ attitudes toward the use of such texts in the post-secondary foreign language environment. In addition, differences between and among the participant-students is analyzed. Cognitive learning theory, noticing hypothesis, and content-based instruction provide the theoretical framework for the study.
Strangers Among Us: Invasive Plants In British Literature, 1669-1800., Thomas Lance Bullington
Strangers Among Us: Invasive Plants In British Literature, 1669-1800., Thomas Lance Bullington
Electronic Theses and Dissertations
Exotic flora in the long eighteenth century (1666-1800) embodied a point of contact between the natural and imaginary worlds, bearing witness to the ways that ideology relocates living things according to human desire. Most accounts view these exotics through the lens of ecological imperialism and “invasive” species. Both of these terms are twenty-first century metaphors that materialize the role of imperialism in circulating exotics, applying the narrative of invading British empire to the behavior of foreign plants. However, such accounts do not fully acknowledge the cultural work that images of foreign plants do. I opt instead for an ecocritical reappraisal …
Spine Lifting Biomechanics Between Varying Occupational Activity Levels And Recreational Physical Activity Levels, Caitlin Rose Francis
Spine Lifting Biomechanics Between Varying Occupational Activity Levels And Recreational Physical Activity Levels, Caitlin Rose Francis
Electronic Theses and Dissertations
Background: Moderate to vigorous physical activity as the optimum movement patterns for health have continued to be the dominant focus of health and fitness research. Yet, emerging evidence of deleterious, adverse health effects of prolonged inactivity, independent of regular physical activity, presents a new element to establishing the ideal model of movement patterns for health. The musculoskeletal trunk of the body becomes unbalanced as a result of prolonged inactivity, and a biomechanical analysis can help to identify high-risk loading behavior associated with these unbalances. Moreover, poor spine biomechanics can indicate a need for adjustment to present recommendations for optimum movement …
Bacteria Prediction For Recreational Waters Through The Use Of Artificial Neural Networks, Christopher Douglas
Bacteria Prediction For Recreational Waters Through The Use Of Artificial Neural Networks, Christopher Douglas
Electronic Theses and Dissertations
Many scientists and government agencies rely on Fecal Indicator Bacteria (FIB) to determine the risk of exposure to pathogens in water. If there is a presence of these indicator bacteria, pathogenic microorganisms may also be present. These bacteria in recreational water bodies pose a health threat to people if ingested during activities such as swimming or from the consumption of marine life. The most commonly tested FIBs are total coliforms, Fecal coliforms, Escherichia coli, Fecal streptococci, and enterococci. The measurement of bacteria can be time consuming (up to 48 hours) and expensive, creating a difficulty in warning the public of …
Effects Of Chronic Mild Stress On Clinically Relevant Endpoints In A Rat Ntg Migraine Model, Mary Katherine Jourdan
Effects Of Chronic Mild Stress On Clinically Relevant Endpoints In A Rat Ntg Migraine Model, Mary Katherine Jourdan
Electronic Theses and Dissertations
No abstract provided.
The Frequency Of The Passive Voice In Freshman Academic Books, Basma Moreb
The Frequency Of The Passive Voice In Freshman Academic Books, Basma Moreb
Electronic Theses and Dissertations
The use of passive voice has long been an area of difficulty for English learners. Celce-Murcia & Larsen-Freeman (2015) noted that it is learning when to use the English passive that presents the greatest long-term challenge to ESL/EFL students (p. 352). Because textbooks are a source of language input for English learners, this study investigated the frequency of passive voice verbs in samples from four academic textbooks in courses commonly taken by freshmen. The study also examined whether there are significant differences between the frequencies by textbook. The data was collected from four General Education Plan (GEP) subject textbooks used …
Rethinking Drinking: A Paradigm Shift For Estimating Social And Behavioral Harm, Thomas Hall
Rethinking Drinking: A Paradigm Shift For Estimating Social And Behavioral Harm, Thomas Hall
Electronic Theses and Dissertations
This study challenges old saws about negative consequences attributed to alcohol use. Previous research findings associate negative social and behavioral consequences with alcohol consumption, as if college students only do regrettable things when they are drunk. Typical research related to negative consequences and alcohol use relies on retrospective self-reporting. Investigators often frame negative consequences as outcomes of problematic drinking or, as more commonly labeled, "binge drinking." In the nomenclature of prevention, binge drinking is not a direct measure of alcohol use resulting in intoxication; it is a hypothetical tipping point, predicting an increased likelihood of the incidence of negative consequences …
Preparing For The Inevitable: Sensemaking In Parent-Child Discussions Of Death, Carrie Ann Wartmann
Preparing For The Inevitable: Sensemaking In Parent-Child Discussions Of Death, Carrie Ann Wartmann
Electronic Theses and Dissertations
Death is something everyone will eventually encounter, yet American society has a tendency to avoid or deny death in everyday life and language. Death makes people uncomfortable, and many view it as a topic too complex for children to understand. Children, however, witness big and little deaths in their lives: of pets, relatives, plants, and favorite fairy tale characters. When a child experiences a death, he or she may have questions for parents or other trusted adults which our current avoidance-geared society does not prepare adults for. Children exist in a specific cultural context, and learn rules and expectations of …