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Full-Text Articles in Entire DC Network
African Wild Dog, Lycaon Pictus, Coloration Patterns And Social Aggregation, Ayong J. Kim
African Wild Dog, Lycaon Pictus, Coloration Patterns And Social Aggregation, Ayong J. Kim
Theses and Dissertations
Packs of African wild dogs, Lycaon pictus, were analyzed for coloration patterns and social aggregation tendencies. Mapped locations determined if the coat patterns followed a geographic distribution that corresponded to Southern or Eastern phenotypic forms. Social aggregation tendencies were observed to determine grouping behavior presumably related to individuals’ roles.
Adult Human Perception Of Distress In The Cries Of Bonobo, Chimpanzee And Human Infants, Taylor Kelly
Adult Human Perception Of Distress In The Cries Of Bonobo, Chimpanzee And Human Infants, Taylor Kelly
Theses and Dissertations
Adult human listeners rated their perceived distress based on the recorded vocalizations of bonobo, chimpanzee and human infants. Results found that bonobos were rated highest, chimpanzee and human infants in the high arousal context were rated as lower distress, and human babies in low arousal rated lowest.
The Association Of Feline Behavior To Acoustical Features Of Kitten Directed Speech, Daniela Acevedo
The Association Of Feline Behavior To Acoustical Features Of Kitten Directed Speech, Daniela Acevedo
Theses and Dissertations
This study observed responses of cats to kitten and adult human directed speech. Human vocalization analysis showed significant variation in harmonicity for kitten directed speech. Playback experiments analyzing feline responses to owners and strangers using kitten and human directed speech showed higher attentiveness to a stranger’s kitten directed speech.
Towards Telepathic Ecologies: A Presentation Of Sources For Image Production Within Information, Lewis A. Longino
Towards Telepathic Ecologies: A Presentation Of Sources For Image Production Within Information, Lewis A. Longino
Theses and Dissertations
Telepathy through information systems, Yutaka Matsuzawa,with Ilya Prigogine, Roger Caillois, Susan Howe, Sueyeun Juliette Lee, Aase Berg, images and artists today form telepathic ecologies through information,Aaron Flint Jamison, Dora Budor, Sb Fuller, Andrea Crespo.
Altered Na, K- Atpase Isoform Expression In Artemia Franciscana In Response To Hypersaline Environments, Jessica Drenth
Altered Na, K- Atpase Isoform Expression In Artemia Franciscana In Response To Hypersaline Environments, Jessica Drenth
Theses and Dissertations
The Na,K-ATPase (NKA) is an essential membrane pump that helps to establish cell ion gradients, and regulate intracellular salt in many organisms. One such species, Artemia franciscana (brine shrimp), extreme halophiles which live in hypersaline environments, expresses 2 distinct α-catalytic subunits of the NKA. One of these subunits, α2-(KK), has two key lysine substitutions located within the cation binding sites. Prior work has demonstrated this specific subunit may be directly involved in brine shrimp adaptation to their extreme environments. However, the precise molecular and physiological effects of α2-(KK) have not been entirely elucidated. I determined through immunohistochemistry that my initial …
On The Cardiac Elastic - 3d Geometrical, Topological, And Micromechanical Properties, Xiaodan Shi
On The Cardiac Elastic - 3d Geometrical, Topological, And Micromechanical Properties, Xiaodan Shi
Theses and Dissertations
In cardiac biomechanics, there is an apparent knowledge gap in 3D cardiac elastin structure and its biomechanical roles. In this study, we fill this knowledge gap via novel biomedical imaging and bioengineering means. In Aim 1, we created an overall mapping of 3D microstructures of the epicardial elastin fibers on porcine left ventricles (LV) using a laser scanning confocal microscope. We demonstrated the location- and depth-dependencies of the epicardial elastin network. Histological staining was also applied to reveal the patterns of endocardial and interstitial elastin fibers, as well as elastin fibers associated with the Purkinje fibers. In Aim 2, a …
Application Of Coastal And Marine Ecological Classification Standard (Cmecs) To Remotely Operated Vehicle (Rov) Video Data For Enhanced Geospatial Analysis Of Deep Sea Environments, Caitlin A. Ruby
Theses and Dissertations
The Coastal and Marine Ecological Classification Standard (CMECS) provides a comprehensive framework of common terminology for organizing physical, chemical, biological, and geological information about marine ecosystems. Federally endorsed as a dynamic content standard, all federally funded data must be compliant by 2018; however, applying CMECS to deep sea datasets and underwater video have not been extensively examined. The presented research demonstrates the extent to which CMECS can be applied to deep sea benthic habitats, assesses the feasibility of applying CMECS to remotely operated vehicle (ROV) video data in near-real-time, and establishes best practices for mapping environmental aspects and observed deep …
The Role Of System Of Systems In Additive Manufacturing, Suyogya Bhandari
The Role Of System Of Systems In Additive Manufacturing, Suyogya Bhandari
Theses and Dissertations
The rapid growth in additive manufacturing technologies have brought various optimization techniques and methodologies to improve each phase that needs to be integrated and analyzed on system level to optimize the system performance. The challenges and limitations of each phase affect the system when integrated as a whole - creating a complex manufacturing environment that needs to be critically examined and managed. To have a better management of complex, emergent, and uncertain manufacturing system from design to recycling phase, a new way of thinking based on more holistic approach is necessary. In this paper, the system of systems paradigm (SoS) …
Laser-Induced Breakdown Spectroscopy: Simultaneous Multi-Elemental Analysis And Geological Applications, Herve Keng-Ne Sanghapi
Laser-Induced Breakdown Spectroscopy: Simultaneous Multi-Elemental Analysis And Geological Applications, Herve Keng-Ne Sanghapi
Theses and Dissertations
Under high irradiation, a fourth state of matter named plasma can be obtained. Plasmas emit electromagnetic radiation that can be recorded in the form of spectra for spectroscopic elemental analysis. With the advent of lasers in the 1960s, spectroscopists realized that lasers could be used simultaneously as a source of energy and excitation to create plasmas. The use of a laser to ignite a plasma subsequently led to laser-induced breakdown spectroscopy (LIBS), an optical emission spectroscopy capable of analyzing samples in various states (solids, liquids, gases) with minimal sample preparation, rapid feedback, and endowed with in situ capability. In this …
Assessment Of Chinese Privet (Ligustrum Sinense Lour.) Control Measures, And Selection Of Most Cost Effective Management Regimes, Fabio Jose Benez Secanho
Assessment Of Chinese Privet (Ligustrum Sinense Lour.) Control Measures, And Selection Of Most Cost Effective Management Regimes, Fabio Jose Benez Secanho
Theses and Dissertations
Chinese privet (Ligustrum sinense) is an invasive plant species in the United States (U.S.). This study utilized the most effective control measures found in the literature, and used financial analysis to identify the most cost effective management regimes to eradicate this species under different conditions. Management regimes were assessed using simulated scenarios created using six components, based on real parameters from the southern U.S.: infestation level, field coverage, stand density, herbicide application method, herbicide, and mechanical removal of privet. Financial impact on land expectation values (LEV) was analyzed and discussed for each simulated area conditions. Results suggest that the most …
Determining Fitness Cost In Qoi-Resistant Isolates Of The Frogeye Leaf Spot Pathogen, Nicole Rochelle Brochard
Determining Fitness Cost In Qoi-Resistant Isolates Of The Frogeye Leaf Spot Pathogen, Nicole Rochelle Brochard
Theses and Dissertations
Frogeye leaf spot is a foliar disease of soybean caused by Cercospora sojina Hara, which until recently had been successfully managed by quinone outside inhibitor (QoI) fungicides. After widespread resistance to the QoI fungicides was reported throughout Mississippi, the next step in characterizing C. sojina was to study the fitness of selected isolates. Fitness measurements of resistance stability, colony growth, conidia production and germination, and virulence were assessed. A phylogenetic analysis was also conducted to assess the genetic similarity of the QoI-resistant and -sensitive C. sojina isolates. All isolates remained stable in terms of QoI resistance. Results of all fitness …
Modified Ant Colony Algorithm For Dynamic Optimization: A Case Study With Wildlife Surveillance, William Bullington
Modified Ant Colony Algorithm For Dynamic Optimization: A Case Study With Wildlife Surveillance, William Bullington
Theses and Dissertations
A novel Ant Colony Optimization (ACO) framework for a dynamic environment has been proposed in this study. This algorithm was developed to solve Dynamic Traveling Salesman Problems more efficiently than the current algorithms. Adaptive Large Neighborhood Search based immigrant schemes have been developed and compared with existing ACO-based immigrant schemes in literature to maintain diversity via transferring knowledge to the pheromone trails from previous environments. Numerical results indicate that the proposed algorithm can handle dynamicity in the environment more efficiently compared to other immigrant-based ACOs available in the literature. A real-life case study for wildlife surveillance by unmanned aerial vehicles …
Social Functioning In Autism Spectrum Disorder: The Effects Of Equine-Assisted Activities, Kate Mccormick
Social Functioning In Autism Spectrum Disorder: The Effects Of Equine-Assisted Activities, Kate Mccormick
Theses and Dissertations
This pilot study examined the effect of participation in an equine-assisted activities (EAA) program on the social functioning of participants with autism spectrum disorder (ASD). Pre- and post-assessments via the Naples Equestrian Challenge Participant Initial Evaluation were completed by a trained Certified Therapeutic Riding Instructor prior to and at the conclusion of a 12 week EAA program. 12 individuals (75% male; M age = 10.8; age range 5 – 20 years) participated. Paired-sample t-tests were conducted to examine the impact of EAA on social functioning. Analyses revealed that involvement in the EAA program resulted in a significant improvement in social …
Novel One-Pot Syntheses Of Uracils And Arylidenehydantoins, And Analysis Of Xylitol In Chewing Gum By Gc-Ms, Rm Suranga Mahesh Rajapaksha
Novel One-Pot Syntheses Of Uracils And Arylidenehydantoins, And Analysis Of Xylitol In Chewing Gum By Gc-Ms, Rm Suranga Mahesh Rajapaksha
Theses and Dissertations
The first section of this dissertation (Chapter I-III) describes the development of new methodologies to prepare uracil and arylidenehydantoin derivatives. A regioselective synthesis of 6-alkyl- and 6-aryluracils was developed by the dimerization of 3-alkyl- and 3-aryl-2-propynamides promoted by either Cs2CO3 or K3PO4. A range of 3-aryl-2- propynamides, with both electron-deficient and electron-rich 3-aryl substituents, were successfully reacted in high yields. A synthetic route to prepare arylidenehydantoins was developed using the Pd-catalyzed dimerization of 3-aryl-2-propynamides. Both electron rich and electron deficient 3-aryl-2-propynamides were dimerized successfully to produce the desired arylidenehydantoins in moderate to excellent yields. The second section of this dissertation …
Off-Host Biology And Ecology Of Immature Gulf Coast Ticks (Amblyomma Maculatum Koch) In Mississippi, Jose Santos Portugal
Off-Host Biology And Ecology Of Immature Gulf Coast Ticks (Amblyomma Maculatum Koch) In Mississippi, Jose Santos Portugal
Theses and Dissertations
Little is understood about off-host behavior and ecology of immature Amblyomma maculatum Koch (Gulf Coast tick). A more complete understanding of this tick is essential to protect human and animal health. My research focused on seasonality and distribution of immatures in Mississippi, potential suitability of some insect and human hosts to larvae, and aspects of nymphal questing behavior. A single larva was collected (third off-host collection reported) when sampling A. maculatum habitat using a novel device. Collection of this larva in November expands the stage’s known seasonality and confirmed a prediction concerning seasonality of larval A. maculatum. Low frequency of …
Pellagra Mortality In The Historic Mississippi State Asylum: A Comparison Of Skeletal Data And Institutional Records, Michelle L. Davenport
Pellagra Mortality In The Historic Mississippi State Asylum: A Comparison Of Skeletal Data And Institutional Records, Michelle L. Davenport
Theses and Dissertations
Pellagra, a nutritional disease with no known diagnostic skeletal indicators, affected patients in the Mississippi State Insane Asylum (MSA) between 1909 and 1936. The current study employed a sample of the MSA’s death-by-discharge records (N=3445) and a skeletal sample (N=19) from the MSA cemetery to test whether co-occurring alveolar bone loss and reduced bone remodeling in the skeletons can be associated with pellagra mortality in the records. Results of the study were inconclusive as to whether the co-occurring markers are associated with pellagra, but suggest that poor dietary conditions within the MSA, conditions prior to institutionalization, and age, sex, and …
Principals' Self-Efficacy In Low Scoring Middle Schools In Mississippi, James Foreman Derryberry
Principals' Self-Efficacy In Low Scoring Middle Schools In Mississippi, James Foreman Derryberry
Theses and Dissertations
This study investigated the self-efficacy (also often referred to as self-confidence) of principals as determined by school administrator certification credentials and teaching endorsements at low performing middle schools in Mississippi. In educational literature, the term “self-confidence” is often referred to under the nomenclature of self-efficacy. In the context of an educational environment, self-efficacy pertains to a principal’s capability to organize and execute courses of action required in leading and managing a school. Successful school management requires a leader who is task oriented, consistently stays focused, employs effective strategies, and utilizes managerial skills. The investigation focused on the self-efficacy, as determined …
Effects Of Riparian Shade On Nearshore Reservoir Fish Assemblages And Water Quality, Clayton D. Raines
Effects Of Riparian Shade On Nearshore Reservoir Fish Assemblages And Water Quality, Clayton D. Raines
Theses and Dissertations
Shade is defined as the coolness and darkness caused by shelter from solar radiation. In freshwater, shade is most commonly provided by riparian vegetation, which can affect water quality through its effects on temperature and light. The purpose of this research was to explore riparian shade influences on (1) fish distribution along reservoir littorals and (2) diel water quality patterns. Sampling was conducted in shaded and non-shaded paired sites in Columbus Lake, Mississippi, U.S.A. Differences in species distribution revealed that, in general, clupeids and most centrarchids were better represented in unshaded sites, while percids were better represented in shaded sites. …
Impact Of Planting Date And Maturity Group On Management Strategies For Insect Pests In Soybean, Nicholas Ryan Bateman
Impact Of Planting Date And Maturity Group On Management Strategies For Insect Pests In Soybean, Nicholas Ryan Bateman
Theses and Dissertations
Soybean accounts from more than half of the acres dedicated to row crop production in the mid-south, leading to a wide planting window from late-March through mid-July. Studies were conducted in 2013 and 2014 evaluating seven planting dates of soybean, and their impact on agronomics. As planting was delayed, plant heights significantly increased, increasing the potential for lodging. Canopy closure significantly decreased as planting was delayed, leaving soybean more vulnerable to caterpillar pests. Yield potential also significantly decreased as planting was delayed. Season long surveys of insect pests and their arthropod natural enemies were conducted from 2013 to 2014 in …
A Mixed Methods Study Of The Relationships Among Academic Achievement, Teaching Strategies And Science And Engineering Fair Participation, Christina Lyn Mcdaniel
A Mixed Methods Study Of The Relationships Among Academic Achievement, Teaching Strategies And Science And Engineering Fair Participation, Christina Lyn Mcdaniel
Theses and Dissertations
It has long been accepted by science education research that science inquiry in the classroom is essential to the development of a deep understanding of the nature of science and the world around us. In an effort to understand the relationship between science inquiry, science process skills, the nature of science and science and engineering fairs, this mixed methods study qualitatively explores teaching strategies of exemplary science and engineering teachers (N=6) who mentored several International Science and Engineering Fair finalists within a 10 year period (2004-2014). The quantitative portion of this research explored the relationship between science fair participation and …
A Study Of A Turn Of The 20th Century Skeletal Collection From Memphis, Tn, Stephen Michael Davis
A Study Of A Turn Of The 20th Century Skeletal Collection From Memphis, Tn, Stephen Michael Davis
Theses and Dissertations
This thesis is a comparative and descriptive study of a turn of the 20th century human commingled skeletal collection from Memphis, TN. The Memphis Regional Forensic Center (MRFC) collection is over four hundred elements recovered in various states of fragmentation. This study focused primarily on the occurrence and prevalence of anatomical cutting and osteoarthritis of the MRFC collection in comparison to contemporary osteological samples to provide insight into a subset of people living in late 19th/early 20th century Memphis, TN. In the framework of biocultural theory, it was discovered that the MRFC collection likely represented individuals subjected to “structural violence” …
Biological And Chemical Assessment Of Glycine Max Modified With Gm-Xth52 Gene Resistant To Attack Of Nematode Heterodera Glycines, Ismail Khan
Theses and Dissertations
Soybean (Glycine max) yield is significantly affected by soybean cyst nematode (SCN), Heterodera glycines, and causes an annual loss of billions of US dollars. In this study, Glycine max xyloglucan endotransglycosylase/hydrolase gene (Gm-XTH52) was transformed into a nematode susceptible G. max [Williams 82/PI 518671] variety of soybean to test whether the protein expression has a role in resistance to H. glycines, and possible chemical changes the expression may cause in the plant composition. Expression level of the Gm-XTH52 gene was three times higher than in controls. Significant reduction in the number of SCN cysts suggested suppression of H. glycines parasitism …
Biopolitics In J.M. Coetzee's Disgrace And Waiting For The Barbarians: Archives Of Bodily Movements In Modernity, Gregory Marcus
Biopolitics In J.M. Coetzee's Disgrace And Waiting For The Barbarians: Archives Of Bodily Movements In Modernity, Gregory Marcus
Theses and Dissertations
By examining the allegorical ways which bodies are produced and their movement controlled within J.M. Coetzee’s works, Waiting for the Barbarians and Disgrace, this thesis follows the shifting paradigm of power from apartheid’s presumption of unity of the state to the rainbow nation’s constitutional declaration that its citizens are “unified in [their] diversity” and equal under the law. In my chapter on Waiting for the Barbarians, I argue that the state creates a fiction of unity which allows the state to invoke claims of emergency and suspend the law; within this suspension, an economy of sacrifice functions to cleanse the …
Deprotonation As A Unified Pathway For Organothiol Binding To Citrate- And Borohydride Reduced Gold Nanoparticles, Sandamini Heshani Alahakoon Ulpanhewa Vidanalage
Deprotonation As A Unified Pathway For Organothiol Binding To Citrate- And Borohydride Reduced Gold Nanoparticles, Sandamini Heshani Alahakoon Ulpanhewa Vidanalage
Theses and Dissertations
The mechanism of organothiol (OT) binding to gold has remained controversial for decades. There are three mechanisms proposed for OT binding to gold surfaces. The first is the radical pathway in which the sulfur-bound hydrogen atoms (RS-H) are released as hydrogen atoms which eventually converted into hydrogen gas. Second is the deprotonation pathway in which the sulfur-bound hydrogen atoms leave as protons. Third is direct adsorption in which the RS-H bonds remain intact on the gold surface. This study demonstrates a combined pH and surface enhanced Raman spectroscopic study of organothiol binding to citrate- and borohydride-reduced gold nanoparticles (AuNPs) in …
The Relationship Between Canine Platelets And Cancer Cells, Sandra Curotto Bulla
The Relationship Between Canine Platelets And Cancer Cells, Sandra Curotto Bulla
Theses and Dissertations
Platelets are small and anucleate blood cells that are well known for their role in hemostasis. Other less recognized platelet functions include contributions to cancer vascularization, growth, and metastasis. Although the participation of platelets in cancer biology has been broadly studied in mouse models, there is no information in the literature regarding the crosstalk of platelets and cancer cells in dogs. The objective of this dissertation was to explore the interaction of canine platelets and tumor cells in vitro. The main hypothesis was that canine platelets were similar to human and murine platelets, and would interact with tumor cells, resulting …
Effect Of Sub-Lethal Chlorine Stress On The Homologous Stress Adaptation, Antibiotic Resistance, And Biofilm Forming Ability Of Salmonella Enterica, Tomilola O. Obe
Effect Of Sub-Lethal Chlorine Stress On The Homologous Stress Adaptation, Antibiotic Resistance, And Biofilm Forming Ability Of Salmonella Enterica, Tomilola O. Obe
Theses and Dissertations
The effect of exposure to sub-lethal chlorine stress on Salmonella enterica serotypes Typhimurium and Heidelberg was examined in this study. Both serotypes demonstrated an acquired tolerance to chlorine with the adapted cells growing in concentrations above the MIC. Chlorine induced a morphological change to the rugose variant in Salmonella. The biofilm formation of the adapted and control cells was tested on food-contact surfaces at room temperature and 37°C. The chlorineapted rugose formed stronger biofilms (P < 0.05) when compared to smooth (adapted and control) on both surfaces tested and at both temperatures. The possibility of crossaptation to antibiotics and low pH was evaluated. Adapted rugose showed reduced susceptibility against some of the antibiotics tested. Chlorine does not aid in the survival of Salmonella enterica at low pH. Chlorine stress can select for tolerant Salmonella cells that attach strongly to food-contact surfaces and after some time may become less susceptible to antimicrobials.
Effects Of Dietary Plasticity And Landscape Heterogeneity On Brown Bears, Lindsey Stutzman
Effects Of Dietary Plasticity And Landscape Heterogeneity On Brown Bears, Lindsey Stutzman
Theses and Dissertations
The brown bear (Ursus arctos) is a generalist omnivore that occupies diverse habitats and displays high levels of behavioral plasticity. Plasticity in foraging behavior can result in variable diets across a population, and allow individuals to use a greater variety of resources. The distribution of food in space and time may also be an important factor in determining brown bear resource selection as it can greatly influence foraging efficiency. Our objectives were to determine if seasonal brown bear home ranges were influenced by temporal availability and spatial distribution of resources and if deviation from an optimal diet influenced brown bear …
Estimates Of Waste Rice, Natural Seeds, And Wetland Birds In Gulf Coast Prairie Ricelands, Joseph Roy Marty
Estimates Of Waste Rice, Natural Seeds, And Wetland Birds In Gulf Coast Prairie Ricelands, Joseph Roy Marty
Theses and Dissertations
Hundreds of wetland bird species use ricelands annually in the Gulf Coast Prairie region of Louisiana and Texas. Much of the original ecosystem was transformed for rice and other crops, cattle ranching, flood control, and other human uses. Flooded production and idled ricelands provide critical foraging habitat for breeding, migrating, and wintering wetland birds. Ricelands in coastal Louisiana and Texas provide approximately 42% of the estimated habitat carrying capacity for wintering waterfowl in this region. In 2010, the Deepwater Horizon oil spill in the Gulf of Mexico prompted enactment of the Migratory Bird Habitat Initiative (MBHI) by USDA Natural Resources …
Characterization Of Myxozoan Parasites Associated With Catfish Aquaculture In Mississippi With Notes On The Development Of H. Ictaluri In Susceptible And Non-Susceptible Catfish Hosts, Thomas Graham Rosser
Characterization Of Myxozoan Parasites Associated With Catfish Aquaculture In Mississippi With Notes On The Development Of H. Ictaluri In Susceptible And Non-Susceptible Catfish Hosts, Thomas Graham Rosser
Theses and Dissertations
Myxozoans are cnidarian parasites of primarily freshwater and marine fish, with some being important pathogens of aquacultured fish species worldwide. Their life cycles have waterborne actinospores released from aquatic annelid definitive hosts and myxospore stages in fish intermediate hosts. In the southeastern United States, catfish aquaculture is burdened by annual losses to a myriad of infectious diseases. Henneguya ictaluri, the causative agent of proliferative gill disease in channel catfish Ictalurus punctatus and female channel catfish x male blue catfish Ictalurus furcatus hybrids, is the most commonly diagnosed parasitic disease of catfish in Mississippi. Other myxozoans infect these ictalurid fish, but …
Death In The Gobi: A Case Study Of Skeletal Trauma From The Hets Mountain Cave In Mongolia, Christina Marie Ramazani
Death In The Gobi: A Case Study Of Skeletal Trauma From The Hets Mountain Cave In Mongolia, Christina Marie Ramazani
Theses and Dissertations
This study represents a contextualized analysis of the perimortem trauma and postmortem treatment of an assemblage (n=9) of naturally mummified individuals recovered from the Hets Mountain Cave in southern Mongolia. The assemblage dates AD 1434-1651, a period characterized by political instability and widespread conflict. Analysis of the trauma was completed utilizing radiological evaluation of 3D CT data. The perimortem trauma and postmortem treatment are contextualized within documentary and archaeological data on contemporary Mongolian mortuary and cultural practices to understand the social identities of these individuals. The trauma patterns are consistent with execution methods reserved for higher status Mongolians; the mortuary …