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2018

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Fatigue Crack Growth Tests And Analyses On A Ti-6al-4v (Stoa) Alloy Using The Proposed Astm Procedures For Threshold Testing, Aniket Chandrakant Mote Dec 2018

Fatigue Crack Growth Tests And Analyses On A Ti-6al-4v (Stoa) Alloy Using The Proposed Astm Procedures For Threshold Testing, Aniket Chandrakant Mote

Theses and Dissertations

This thesis investigates fatigue crack growth rate behavior in the threshold and near-threshold regimes for a Ti-6Al-4V (STOA) alloy using two proposed ASTM procedures- (1) load-shedding (LS) using a larger load-shed rate than the current ASTM Standard E647 load-reduction (LR) test procedure, and (2) compression pre-cracking constant-amplitude (CPCA) or load-increasing (CPLI) and load-shedding (CPLS). Tests were conducted at a low stress ratio (R = 0.1) on compact C(T) specimens of two different widths (W = 51 and 76 mm) and threshold fatigue crack growth rates were generated. These test data were compared to previous test data produced from the same …

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Breeding Of Cool-Season Forage Grasses For Abiotic And Biotic Stress Tolerance In The Southern United States, Eric Douglas Billman Dec 2018

Breeding Of Cool-Season Forage Grasses For Abiotic And Biotic Stress Tolerance In The Southern United States, Eric Douglas Billman

Theses and Dissertations

Abiotic stress tolerance and biotic stress resistance have long been targets for trait improvement in the field of plant breeding. To date, much of the target crop focus has been centered on commodity crops such as corn, soybean, wheat, and rice. However, little work has been conducted on improvement of these traits in forage grasses. This is due to a number of issues, particularly that most species are obligately outcrossing, the traits are governed by many genes at unknown loci, and are greatly affected by environmental variation. This creates major complications in successfully selecting and breeding populations of forage grasses …

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Healthcare Experiences Of Transgender Mississippians: A Qualitative Study, Micah D. King Dec 2018

Healthcare Experiences Of Transgender Mississippians: A Qualitative Study, Micah D. King

Theses and Dissertations

For this study, in-depth, semi-structured interviews were conducted with 16 transgender adults who lived, or had previously lived, in Mississippi and sought healthcare services in the state. The questions asked focused on identifying the barriers to care that these individuals faced as well as the strategies for navigating the barriers they employed. Recommendations for providers were also considered.

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Health Science Curriculum For Early Childhood: Teacher Implementation And Impact On Child Health Knowledge, Carla J. Mays Dec 2018

Health Science Curriculum For Early Childhood: Teacher Implementation And Impact On Child Health Knowledge, Carla J. Mays

Theses and Dissertations

This dissertation contains two secondary quantitative data analyses studies. In the first, implementation of the WannaBee Healthy? Be Smart! Be Active! Be a Leader! health science curriculum was examined to expand understanding about teacher usage of an integrated health curriculum. Specifically, researchers assessed the amount of activities within each curriculum domain (i.e., books, creative expressions, language/literacy, math, science) and the number of activities within each theme of the lessons (i.e., nutrition, physical activity, sleep) utilized by participating teachers. Prior to implementation, teachers (N = 68; M age = 35.5 years old) attended a one-hour training where use of the curriculum …

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History, Status, And Resource Selection Of The American Black Bear In Mississippi, Stephanie Lynn Simek Dec 2018

History, Status, And Resource Selection Of The American Black Bear In Mississippi, Stephanie Lynn Simek

Theses and Dissertations

Historically, black bears occurred throughout Mississippi but by 1932, <12 bears remained. Repatriation in neighboring states and conservation efforts in Mississippi have led to the recolonization of at least 2 subspecies (U. a. luteolus and U. a. americanus) of black bears in the state. I compiled available data to provide a synthesis of the history, current status, and management of black bears in Mississippi. Additionally, I used global positioning data collected from radio collared bears to determine the influence of distance to source population, cover type, distance to roads, distance to water, wetland reserve program areas, and human population density on black bear resource selection at various spatial scales. I studied characteristics of space use and resource selection of recolonizing bears in the Mississippi Alluvial Valley (Delta). I assessed the influence of environmental parameters at the female core annual home-range (using 50% kernel density estimator) and male and female seasonal and annual home-ranges (95% kernel density estimator). Distance to source population and distance to roads had significant influence at the core female home-range scale. I found a sex-based difference in annual and seasonal home-ranges. I also found that bears exhibited response to and selection for specific resources with an affinity toward hardwood stands, particularly young-aged hardwoods. My research illustrates the importance of analyzing resource selection at multiple scales to gain a full understanding of parameters that influence the recolonization of a bear population.

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Application Of Hydrocolloid And Propylene Glycol Infused Nets And Coatings On Cave Aged Cheddar Chees And Their Impact On Tyrophagus Putrescentiae Growth And Sensory Properties, Kavitha Rama Krishnan Dec 2018

Application Of Hydrocolloid And Propylene Glycol Infused Nets And Coatings On Cave Aged Cheddar Chees And Their Impact On Tyrophagus Putrescentiae Growth And Sensory Properties, Kavitha Rama Krishnan

Theses and Dissertations

The objective of this study was to evaluate the effects of using food grade coatings and nettings formulated with xanthan gum and propylene glycol (PG) or carrageenan (CG), propylene glycol alginate and PG on aged Cheddar cheese to control Tyrophagus putrescentiae growth at temperatures of 10°C, 15°C, and 20°C and relative humidity’s of 75% and 85%. Cheddar cheese cubes with treated nets and coatings inhibited mite growth at all temperature and relative humidity combinations. Control cheese cubes either without coatings or in untreated nets had fewer mites (P<0.05) at 10°C than at 15°C or 20°C. The sensory properties of the cheese were not affected by the coatings and nettings at 10°C and 75 % RH. However, all other temperature and RH combinations with the exception of the CG netting at 15°C at 75 % and 85 % RH caused sensory flavor differences (P<0.05).

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Functional Role Of Protein Kinases And Phosphatase In Abiotic Stress Response In Plants, Saroj Kumar Sah Dec 2018

Functional Role Of Protein Kinases And Phosphatase In Abiotic Stress Response In Plants, Saroj Kumar Sah

Theses and Dissertations

Soybean (Glycine max) and rice (Oryza sativa) are the most important crops cultivated worldwide. The productivity of both crops is severely limited due to drought stresses. Abscisic acid (ABA) signaling is one of the crucial phytohormones which acts as the signaling mediator in different environmental stress for adaptive response of plants. In this study, functional characterization of abscisic acid-activated protein kinase-like kinase 1 (AALK1), and low molecular weight protein tyrosine phosphatase (LMWPTP) were studied by developing gain-ofunction and loss-ofunction phenotypes by transgenesis. Physiological response of AALK1 showed that AALK1 modulates the drought stress response ins soybean plants. The study has …

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Genetic Assessment Of Native And Non-Native White-Tailed Deer (Odocoileus Virginianus) In The Southcentral U.S., Jordan L. Youngmann Dec 2018

Genetic Assessment Of Native And Non-Native White-Tailed Deer (Odocoileus Virginianus) In The Southcentral U.S., Jordan L. Youngmann

Theses and Dissertations

Population genetics of white-tailed deer (Odocoileus virginianus) have been influenced through human actions including the translocation of deer from across the United States in the 1900s and, recently, the creation of the captive-cervid industry, which uses animal husbandry to manipulate genetic variation. To assess the effects of these actions, I studied the genetic variation of free-range and captive populations of deer across the southcentral U.S. using a 14 microsatellite panel. In free-range populations I found genetic structure that divided deer west to east along the Mississippi River. Additionally, I found that captive populations were genetically distinct from geographically proximate free-range …

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Goodness-Of-Fit Test For Hazard Rate, Ralph Antoine Vital Dec 2018

Goodness-Of-Fit Test For Hazard Rate, Ralph Antoine Vital

Theses and Dissertations

In certain areas such as Pharmacokinetic(PK) and Pharmacodynamic(PD), the hazard rate function, denoted by ??, plays a central role in modeling the instantaneous risk of failure time data. In the context of assessing the appropriateness of a given parametric hazard rate model, Huh and Hutmacher [22] showed that their hazard-based visual predictive check is as good as a visual predictive check based on the survival function. Even though Huh and Hutmacher’s visual method is simple to implement and interpret, the final decision reached there depends on the personal experience of the user. In this thesis, our primary aim is to …

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Nostalgia And Forestalgia: Testing Construal Level Theory In Regard To Past-Focused And Future-Focused Marketing Appeals, Robert Wixel Barnwell Dec 2018

Nostalgia And Forestalgia: Testing Construal Level Theory In Regard To Past-Focused And Future-Focused Marketing Appeals, Robert Wixel Barnwell

Theses and Dissertations

Marketing appeals often capitalize upon nostalgia. By highlighting periods of the past, practitioners hope to elicit positive associations in the minds of consumers between the past and desired responses, from purchases to donations to political support. Though less often, marketing appeals also draw upon the future as a way of making the featured good or service more appealing to potential consumers. Could these different temporal distances into the future or into the past impact the reaction of consumers? Could the context of a product being either hedonic or utilitarian have an influence on the outcome of these past or future …

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Smoke Signals: New Contexts For The Emergence, Spread, And Decline Of Effigy Pipes In Southeastern North America, A.D. 1000-1600, Charles Van De Kree Dec 2018

Smoke Signals: New Contexts For The Emergence, Spread, And Decline Of Effigy Pipes In Southeastern North America, A.D. 1000-1600, Charles Van De Kree

Theses and Dissertations

The cultural significance of effigy pipes among southeastern groups during the Mississippian period (A.D. 1000-1600) has yet to be fully understood. Recent studies, however, have provided new archaeological contexts for framing explanations of their possible use and distribution among such groups. Apart from conjectures about their use as ceremonial objects, selection for effigy pipes in the Mississippian Southeast was directly related to fluctuating environmental and demographic conditions under which such objects were manufactured and distributed. These conditions provided the appropriate context for their emergence as costly signaling devices through which elite or special interest groups advertised fitness levels, typically expressed …

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Social Inequality In The Early Bronze Age At Bab Edh-Dhra, Jordan, Natalie Patience Dec 2018

Social Inequality In The Early Bronze Age At Bab Edh-Dhra, Jordan, Natalie Patience

Theses and Dissertations

Bab edh-Dhra is the most extensively excavated cemetery from Early Bronze Age, Jordan. Despite thorough study, the social structure and existence of social inequality remain unclear. This was addressed using osteological evidence of physiological stress to compare between family tombs. In societies exhibiting social inequality, individuals of lower status experience higher levels of stress. Evidence of physiological stress (femoral length, LEH, metabolic disorders, periosteal reactions, cribra orbitalia, and porotic hyperostosis) was recorded using standard methods for 250 adults. The artifact counts in this study have been previously published. Differences in the frequency of stress indicators were compared using chi-square tests. …

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Soil Moisture Stress Effects On Soybean Vegetative, Physiological, And Reproductive Growth And Post-Harvest Seed Physiology, Quality, And Chemical Composition, Godakande Chathurika Wijewardana Dec 2018

Soil Moisture Stress Effects On Soybean Vegetative, Physiological, And Reproductive Growth And Post-Harvest Seed Physiology, Quality, And Chemical Composition, Godakande Chathurika Wijewardana

Theses and Dissertations

With the increasing scarcity of water resources, soil moisture stress is the single most threat to global soybean production causing extensive yield losses. The objectives of this study were to investigate soil moisture stress effects on all aspects of soybean growth and development processes and to develop functional algorithms that could be used for field management decisions and in soybean crop modeling. To fulfill these objectives, six experiments were conducted; one in vitro osmotic stress study on seed germination, four studies by imposing five soil moisture treatments, 100, 80, 60, 40, and 20% of daily evapotranspiration of the control at …

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Polyploidy Hybrids From Wide Crosses Between Hordeum Vulgare And H. Bulbosum For Improving Salinity Tolerance Using Embryo Rescue, Abdullah Hassn Mohammed Dec 2018

Polyploidy Hybrids From Wide Crosses Between Hordeum Vulgare And H. Bulbosum For Improving Salinity Tolerance Using Embryo Rescue, Abdullah Hassn Mohammed

Theses and Dissertations

Salinity is a critical challenge facing productivity of crops around the world, causing major reduction in growth, yield, and quality. It is necessary to produce varieties with the ability to tolerate salinity. However, the lack of genetic variation among H. vulgare genotypes prevents progress in developing salt tolerant varieties. H. bulbosum is a source of tolerance to stress conditions. Consequently, five accessions of domestic barley and six of wild barley were used in this study. Accessions were screened for salinity tolerance. Genotypes 7, 9, and 10 germinated at 2% NaCl. Lines of H. vulgare showed reduction of root and shoot …

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Prediction Of Energy Expenditure From Accelerometers During Physical Activity In Adults With Down Syndrome: The Effect Of Accelerometer Placement, Anthony T. Allred Dec 2018

Prediction Of Energy Expenditure From Accelerometers During Physical Activity In Adults With Down Syndrome: The Effect Of Accelerometer Placement, Anthony T. Allred

Theses and Dissertations

There is a need to examine the difference in the relationship between oxygen uptake (VO2) and output from hip- and wrist-worn accelerometers in adults with Down syndrome (DS). The purpose of this study is to identify if that relationship is different between adults with and without DS. Hip- and wrist-worn accelerometer accuracy was also assessed. The sample included 16 adults with DS (10 men; age 31±15 years) and 19 adults without DS (10 men; age 24±6 years). We measured VO2 with a portable spirometer and accelerometer output (Vector Magnitude [VM]) with a hip- and a wrist-worn accelerometer. VM and group …

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Stress-Buffering Of Social Support On Depressive Problems: Moderation By Parental Depressive Problems, Erica Marie Szkody Dec 2018

Stress-Buffering Of Social Support On Depressive Problems: Moderation By Parental Depressive Problems, Erica Marie Szkody

Theses and Dissertations

The impact of parental depressive problems on children’s depressive symptoms has been widely studied. The Stress Buffering Hypothesis states that social support acts as a protective factor between the impacts of stress from negative life events on physical and psychological health. The current study examined the stress buffering hypothesis in terms of the relationship between parental depressive problems and emerging adult depressive problems. The differential buffering strength of both perceived social support and received social support between stress from negative life events and depressive problems were examined along with the moderating effects of parent and emerging adult gender. Neither perceived …

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Subsurface Framework And Fault Timing In The Missourian Granite Wash Interval, Stiles Ranch And Mills Ranch Fields, Wheeler County, Texas, Brendan Michael Lomago Dec 2018

Subsurface Framework And Fault Timing In The Missourian Granite Wash Interval, Stiles Ranch And Mills Ranch Fields, Wheeler County, Texas, Brendan Michael Lomago

Theses and Dissertations

The recent and rapid growth of horizontal drilling in the Anadarko basin necessitates newer studies to characterize reservoir and source rock quality in the region. Most oil production in the basin comes from the Granite Wash reservoirs, which are composed of stacked tight sandstones and conglomerates that range from Virgillian (305-299 Ma) to Atokan (311-309.4 Ma) in age. By utilizing geophysical well logging data available in raster format, the Granite Wash reservoirs and their respective marine flooding surfaces were stratigraphically mapped across the regional fault systems. Additionally, well log trends were calibrated with coincident core data to minimize uncertainty regarding …

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Sustainability Of Preparations Programs Initiated Through The Information Technology (It) Professionals In Health Care Program, Nena Parrish Scott Dec 2018

Sustainability Of Preparations Programs Initiated Through The Information Technology (It) Professionals In Health Care Program, Nena Parrish Scott

Theses and Dissertations

In 2010, the Office of National Coordinator (ONC), a branch of the federal government, launched a program called the IT Professionals in Health Care Program. The Program was intended to address the anticipated shortage of skilled workers in health information technology (HIT) and electronic health records (EHRs). According to the National Opinion Research Center (NORC, 2014), the ONC estimated a shortfall of 51,000 HIT workers over 5 years in terms of the number that would be needed to fully support health care providers and facilities in the adoption of EHRs. The growing demand for HIT professionals did not match the …

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Removal Of Dietary Antimicrobials And Effects Of Their Replacement With Bacillus Subtilis On The Growth And Intestinal Health Of Male Broilers, Kacey O'Donnell Dec 2018

Removal Of Dietary Antimicrobials And Effects Of Their Replacement With Bacillus Subtilis On The Growth And Intestinal Health Of Male Broilers, Kacey O'Donnell

Theses and Dissertations

The effects of dietary antimicrobial removal and Bacillus subtilis supplementation on the growth and intestinal health of male broilers were investigated. Birds were fed either a control, antimicrobial, or a B. subtilis probiotic diet at different feeding phases. Birds were challenged with a 10 × dose of a coccidiosis vaccine. Supplementation of B. subtilis in for antimicrobials in the late grower and early finisher phases improved growth similar to birds fed antimicrobials until withdrawal, while antimicrobial removal without B. subtilis supplementation in those periods hindered growth. The improved growth suggests that the probiotic was able to alleviate the stress of …

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Scaling Undergraduate Scientific Writing Via Prominent Feature Analysis, Katarzyna Zaruska Gallo Dec 2018

Scaling Undergraduate Scientific Writing Via Prominent Feature Analysis, Katarzyna Zaruska Gallo

Theses and Dissertations

Prominent Feature Analysis (PFA) is a reliable and valid writing assessment tool, derived from the writing it is used to assess. PFA, used to assess on-demand expository essays in Grades 3-12, uncovers positive and negative characteristics of a sample. To extend PFA to a new academic level and genre, I assessed scientific writing of 208 undergraduates, identifying 35 linguistic and 20 scientific prominent features. An essay could earn up to 28 positive (24 linguistic and four scientific), and up to 27 negative marks (11 linguistic and 16 scientific). The minimum prominent features number in a paper was 3, the maximum …

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Proximate Composition, Retained Water, And Bacterial Load For Two Sizes Of Hybrid Catfish (Ictalurus Furcatus X Ictalurus Punctatus) Fillets At Different Process Steps, Mohammad Manirul Haque Dec 2018

Proximate Composition, Retained Water, And Bacterial Load For Two Sizes Of Hybrid Catfish (Ictalurus Furcatus X Ictalurus Punctatus) Fillets At Different Process Steps, Mohammad Manirul Haque

Theses and Dissertations

The overall baseline (as received) moisture, protein and fat content of hybrid catfish (Ictalurus furcatus x Ictalurus punctatus) fillets were 77.8 +/- 1.38%, 16.7 +/- 0.50% and, 5.7 +/- 1.6%, respectively. Small fillets (111 +/- 19 g) had higher (P≤0.05) baseline moisture (78.6 +/- 0.87% vs 76.8 +/- 1.15%) and lower (P≤0.05) fat content (4.7 +/- 0.64% vs 6.8 +/- 1.72%) than large fillets (247 +/- 62 g), whereas protein content was similar (P>0.05) for both sizes. Retained water of the final fresh and frozen fillets was 1.2 +/- 2.03% and 3.1 +/- 1.02%, respectively, irrespective of fillet size. …

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Pathogenicity Of Clostridium Perfringens And Its Relationship With Gut Microbiota In Chickens, Wenyuan Yang Dec 2018

Pathogenicity Of Clostridium Perfringens And Its Relationship With Gut Microbiota In Chickens, Wenyuan Yang

Theses and Dissertations

Necrotic enteritis (NE), a devastating enteric disease caused by Clostridium perfringens type A, contributes to the losses of 6 billion dollars worldwide per year and is currently being considered as a major global threat to the poultry industry. In past decades, it has been well-controlled by ineed antimicrobial growth promoters (AGPs). The withdrawal of AGPs due to antibiotic-resistance concerns resulted in a spike in NE incidence and led to the re-emergence of NE in the modern broiler production system. To unveil the association of toxin genes of C. perfringens, particularly for netB, with clinical NE, a self-designed qPCR primer set …

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Perception And Training Needs Of Mississippi State University Extension Agents And The Level Of Demand They Receive For Information In Organic Agriculture, Thamir Niamah Al-Janabi Dec 2018

Perception And Training Needs Of Mississippi State University Extension Agents And The Level Of Demand They Receive For Information In Organic Agriculture, Thamir Niamah Al-Janabi

Theses and Dissertations

The purpose of this study was to determine perception and training needs of Mississippi State University Extension agents in organic agriculture. The study followed the Borich Needs Assessment Model. Data were collected via Qualtrics. The population of the study was 154 Mississippi State University Extension agents with 77 Extension agents responding to the questionnaire. Most agents were 40 to 49 years old with an almost equal percentage being male and female. The majority of agents (75.3%) had master’s degree. More than one third of the agents indicated the level of demand towards raising livestock organically had stayed the same. Also, …

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Organic And Inorganic Contaminants Removal From Water With Engineered Biochar, Narada Bombuwala Dewage Dec 2018

Organic And Inorganic Contaminants Removal From Water With Engineered Biochar, Narada Bombuwala Dewage

Theses and Dissertations

Water pollution represents one of the major concerns of the modern world, after scientific and industrial development that generates hazardous organic and inorganic contaminants. Biochar (BC) has gained tremendous attention in the past decade as a cheap and efficient adsorbent for organic and inorganic contaminants from aqueous solutions. BC is considered to be a low-cost alternative to activated carbon, however, BC typically suffer performance reductions due to their low surface areas and poor mechanical properties. The main objective of this work is to develop novel biochar materials by modifying the biochar surface for the removal of organic and inorganic contaminants …

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Parent And Child Perceived Coping Socialization During Peer Conflict: A Qualitative Study, Janet W. Kwan Dec 2018

Parent And Child Perceived Coping Socialization During Peer Conflict: A Qualitative Study, Janet W. Kwan

Theses and Dissertations

Despite budding research on parent-child discrepant perceptions of a child’s psychosocial functioning, the potential difference in individual perception of coping socialization is unclear. Further, literature suggests the onset of various impulse-control disorders occurs around middle childhood. Thus, the current study used a phenomenological approach and thematic analysis to examine perspectives of coping socialization, identify intended take away messages, and examine the perceived impact of inconsistent understanding of the interaction. Results indicated both parents and children use verbal and physical cues to understand one another during coping socialization and that their lab discussion was representative of their typical interactions. Themes emerged …

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Impact Of Integrated Vegetation Management Practices On Green Antelopehorn Milkweed (Asclepias Viridis Walter) In Right-Of-Ways And Forages, Nolan Hendrix Thorne Dec 2018

Impact Of Integrated Vegetation Management Practices On Green Antelopehorn Milkweed (Asclepias Viridis Walter) In Right-Of-Ways And Forages, Nolan Hendrix Thorne

Theses and Dissertations

Common integrated vegetation management (IVM) practices including herbicide and mowing applications on right-of-ways and forages were evaluated on green antelopehorn populations near Starkville, MS. Live stems in each plot were counted prior to treatment application and approximately one year after treatment (YAT). Analysis of the stem counts 1YAT indicated aminopyralid+metsulfuron, imazapyr, picloram+2,4-D, maximum rates of triclopyr ester or choline, glyphosate, imazapyr+aminocyclopyrachlor+metsulfuron reduced the number of green antelopehorn stems compared to the untreated. Aminocyclopyrachlor, aminocyclopyrachlor+chlorsulfuron, aminopyralid, aminopyralid+2,4-D, dicamba+2,4-D, foramsulfuron+iodosulfuron+thiencarbazone, fluroxypyr, hexazinone, metsulfuron, metsulfuron+chlorsulfuron, nicosulfuron+metsulfuron, sulfometuron, sulfosulfuron or low rates of triclopyr did not reduce the stem count 1YAT when compared to …

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Impact Of Walnuts On Blood Pressure In A Small Convenience Sample Of African Americans In Mississippi, Camille N. Barnes Dec 2018

Impact Of Walnuts On Blood Pressure In A Small Convenience Sample Of African Americans In Mississippi, Camille N. Barnes

Theses and Dissertations

Hypertension is the cause of about 7.5 million deaths per year, globally. More than 40% of African Americans are diagnosed with hypertension. The aim of this study was to examine the effects of walnut consumption on blood pressure in a small convenience sample of African Americans in Mississippi. Fifty subjects participated in the study. Blood pressure was measured once a week for three weeks prior to the initiation of the intervention for a baseline data of the subjects’ normal blood pressure. During the 6-week intervention, the participants consumed a package of walnuts, daily. Blood pressure was measured weekly. The results …

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Implementation And Evaluation Of A School-Based Anti-Tobacco Program In Mauritius: A Pilot Study To Assess The Usefulness And Reliability Of A Tobacco Use Prevention Education Instrument, Shariah Hussenbocus Dec 2018

Implementation And Evaluation Of A School-Based Anti-Tobacco Program In Mauritius: A Pilot Study To Assess The Usefulness And Reliability Of A Tobacco Use Prevention Education Instrument, Shariah Hussenbocus

Theses and Dissertations

Tobacco use among Mauritian adolescents has increased steadily since 2008. Currently, Mauritius has not implemented any school-based anti-tobacco program and there is no instrument to assess the effectiveness of existing anti-tobacco school policies. Since the first cigarette can rapidly lead to nicotine dependence, targeted interventions must be assessed before established patterns of smoking appear. This study evaluated a tobacco use prevention education instrument to determine the effectiveness of a school-based anti-tobacco program. 26 male students completed a survey before and after receiving anti-tobacco lessons. Smoking initiation age could not predict likelihood of tobacco addiction (r(12)=0.320, p=0.311). However, after receiving the …

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Improving Dropout Rates In Mississippi Schools: A Case Study Examining Effective Dropout Prevention Programs In Mississippi High Schools, Shevonda Williams Truman Dec 2018

Improving Dropout Rates In Mississippi Schools: A Case Study Examining Effective Dropout Prevention Programs In Mississippi High Schools, Shevonda Williams Truman

Theses and Dissertations

The dropout rate for many Mississippi high schools has improved tremendously over the last decade. In 2017, the Mississippi Department of Education reported that the dropout rate for the State declined form 13.9% to 10%. This rate was only 4% higher than the national average. However, with all the research that pertains to student dropouts and the success many states are seeing, there are still school districts failing to show improvement. Many high schools have dropout rates in excess of 20%. This study explored the perceptions of district high school principals, counselors, and other administrators working in schools with students …

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In Vivo Study Of The Effect Of Different Levels Of Chemical Fertilizers On The Indigotin Dye In The Indigofera Tinctoria Plant Using Raman Spectroscopy, Fatemah Alharthi Dec 2018

In Vivo Study Of The Effect Of Different Levels Of Chemical Fertilizers On The Indigotin Dye In The Indigofera Tinctoria Plant Using Raman Spectroscopy, Fatemah Alharthi

Theses and Dissertations

An impact of nitrogen, phosphorus and potassium fertilizers on the concentration changes of carotenoid pigments in the Indigofera tinctoria plant by using Raman spectroscopic techniques is studied. Three different concentration levels of the fertilizers with a normal supply as control were added to the plants at two stages. The Raman spectra were taken to determine the carotenoid concentration level changes in the plant leaves in vivo. The ring-stretching mode are the Raman spectroscopic signatures for the carotenoid pigment and its magnitude increased significantly (over 170%) for the case of phosphorus and potassium fertilizers. The effect from the nitrogen fertilizer was …

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