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Evaluation Of Cobb Mv X Cobb 500 Broiler Digestible Lysine Requirement And Response To Various Nutrient Regimens During The Finisher Phase, Dalton Gerard Dennehy May 2022

Evaluation Of Cobb Mv X Cobb 500 Broiler Digestible Lysine Requirement And Response To Various Nutrient Regimens During The Finisher Phase, Dalton Gerard Dennehy

Theses and Dissertations

Previous research evaluated the dLys requirement and the impact of varying dLys and AME on Cobb MV x Cobb 500 broilers during the starter and grower phases, leaving the finisher phase to be determined. Experiment 1 estimated the finisher dLys requirement to range from 0.748-1.32% for males and 0.752-1.292% for females. Male broilers were more responsive to increasing dLys than females, though in general, increasing dLys improved performance and processing. Experiment 2 determined the effects of varying finisher dLys and AME on broiler performance and processing. Increasing dLys improved BWG, FCR, ALI, and breast yield while decreasing FI and fat …

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The Effects Of Short-Term Sea Level Rise On Vegetation Communities In Coastal Mississippi, Brianna Michelle Andrews May 2022

The Effects Of Short-Term Sea Level Rise On Vegetation Communities In Coastal Mississippi, Brianna Michelle Andrews

Theses and Dissertations

Salt marshes are important habitats that provide many ecosystem services, but they are susceptible to the impacts of sea level rise (SLR), often resulting in emergent vegetation loss. In areas with enough sediment input, marshes can keep pace with SLR by gaining elevation or through upland migration. However, salt marshes in areas with limited sediment input, such as the Grand Bay National Estuarine Research Reserve, often cannot keep pace with sea level rise. Additionally, the rate of SLR is increasing making it more difficult for marshes to keep pace. To assess the short-term response of marsh vegetation to sea level …

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Evaluating Cover Crops To Determine The Best Management Practice For The Suppression Of Tall Waterhemp And Italian Ryegrass, Samuel R. Reeves May 2022

Evaluating Cover Crops To Determine The Best Management Practice For The Suppression Of Tall Waterhemp And Italian Ryegrass, Samuel R. Reeves

Theses and Dissertations

To combat herbicide resistance among weeds, non-herbicide methods of control, such as cover crops, are becoming widely adapted. Experiments were conducted to determine how to effectively establish and manage cover crops in order to suppress tall waterhemp and Italian ryegrass and to assess their overall impact on soybean growth and yield. Various cover crop establishment methods were evaluated, and it was determined that interseeding at the R7 growth stage of soybean was the least effective method for proper cover crop establishment. Biomass data demonstrated that interseeding created the least amountof cover crop biomass, with no differences found among the other …

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Against The Clock: Uncovering Diurnal Time Interval Decision Differences During Tornado Warnings For Lower Mississippi Valley Residents, Stephen Holden Wooten May 2022

Against The Clock: Uncovering Diurnal Time Interval Decision Differences During Tornado Warnings For Lower Mississippi Valley Residents, Stephen Holden Wooten

Theses and Dissertations

With a higher number of nocturnal tornado events, I surveyed residents of Alabama, Arkansas, Kentucky, Mississippi, and Tennessee (N = 487 for each sample) to determine the time, in minutes, it took to reach a decision on shelter-seeking. I utilized latent class analysis (LCA) to create class memberships, based on diurnal and nocturnal scenarios, to associate with time intervals. Four actors were identified for each scenario: Tech Users, Typical Actors, Non-Reactors, and Social Actors for the day sample, Tech Users, Typical Actors, Passive Actors, and Non-Reactors for the night sample. Time intervals were created and applied to each class. All …

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Direct Simulation And Reduced-Order Modeling Of Premixed Flame Response To Acoustic Modulation, Zheng Qiao May 2022

Direct Simulation And Reduced-Order Modeling Of Premixed Flame Response To Acoustic Modulation, Zheng Qiao

Theses and Dissertations

This dissertation introduces a general, predictive and cost-efficient reduced-order modeling (ROM) technique for characterization of flame response under acoustic modulation. The model is built upon the kinematic flame model–G-equation to describe the flame topology and dynamics, and the novelties of the ROM lie in i) a procedure to create the compatible base flow that can reproduce the correct flame geometry and ii) the use of a physically-consistent acoustic modulation field for the characterization of flame response. This ROM addresses the significant limitations of the classical kinematic model, which is only applicable to simple flame configurations and relies on ad-hoc models …

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Procedures For Genetic Modification Of Miscanthus X Giganteus, A Biomass Crop, Anjali Arpan May 2022

Procedures For Genetic Modification Of Miscanthus X Giganteus, A Biomass Crop, Anjali Arpan

Theses and Dissertations

Development of genetic improvement procedures for the bioenergy crop, Miscanthus × giganteus (M×g; triploid), are desired for trait improvement. Agrobacterium tumefaciens has been used in other Miscanthus spp. for genetic improvement, but not in M×g, nor have more than a few genes been introduced at a given time. Transformation procedures for M×g were developed; studies included use of A.tumefaciens (strain LBA4404) and A. rhizogenes (strain A4) for introduction of seven genes isolated (by other researchers) from Sorghum bicolor involved in sorgoleone biosynthesis (an allelopathic compound), and selectable marker gene neomycin phosphotransferase II. Procedural development included generation of …

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Workers Of Iniquity: Stories, Isaac Huckaby May 2022

Workers Of Iniquity: Stories, Isaac Huckaby

Theses and Dissertations

In her essay, “The Grotesque in Southern Fiction,” Flannery O’Connor notes, “Whenever I’m asked why Southern writers particularly have a penchant for writing about freaks, I say it is because we are still able to recognize one” (44). In the introduction to this collection, I investigate the importance of the grotesque, gothic, and surreal elements that tend to make up the depictions of the South in the works of authors such as Flannery O’Connor and Brad Watson and several horror writers, such as Stephen King, Edgar Allan Poe, and H.P. Lovecraft, exploring how horror can be used to emphasize the …

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Non-Classroom Involvement Among Rural Community College Students: An Application Of Tinto And Astin’S Models, William Johnson Bowlin May 2022

Non-Classroom Involvement Among Rural Community College Students: An Application Of Tinto And Astin’S Models, William Johnson Bowlin

Theses and Dissertations

Participation in non-classroom activities has been documented to extend the intellectual, social, and psychosocial outcomes of the college experience. However, the benefits of non-classroom activities are often difficult to quantify due their voluntary nature, with findings mostly related to students within four-year institutions. The purpose of this study was to determine whether rural community college full-time freshman students who participate in non-classroom activities differ from nonparticipants with regard to self-identified values of academic integration, social integration, degree commitment, collegiate stress, and institutional commitment. These five factors have been demonstrated to influence student persistence and were adopted from Davidson et al.’s …

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Evaluation Of Agronomic Performance And Weed Control In Soybean Grown With Different Row Configurations, Planting Dates, And Soil Textures, Franklin Read Kelly May 2022

Evaluation Of Agronomic Performance And Weed Control In Soybean Grown With Different Row Configurations, Planting Dates, And Soil Textures, Franklin Read Kelly

Theses and Dissertations

Planting date, seeding rate, soil texture, and row configuration are important factors in soybean production. Each of these factors can impact overall production and yield of soybean immensely. Growers can have difficulty making decisions about how to best manage their production systems with these factors in mind. Therefore, research was conducted from 2019 to 2021 at the Delta Research and Extension Center in Stoneville, MS, to evaluate the agronomic performance, yield components, and weed control of soybean planted with different planting dates, row configurations, soil textures and/or seeding rates. Common row configurations utilized in Mississippi soybean production were compared to …

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Diversity-Productivity Relationships In Forests Of The Southeastern United States: Leveraging National Inventory Data And Tree Functional Traits, Elizabeth Baach May 2022

Diversity-Productivity Relationships In Forests Of The Southeastern United States: Leveraging National Inventory Data And Tree Functional Traits, Elizabeth Baach

Theses and Dissertations

Numerous studies have evaluated the relationship between biodiversity and productivity, with general trends suggesting a positive relationship. While most studies only use species richness, this study also analyzed how productivity changes with functional diversity and Shannon’s diversity index. Functional diversity gives important context to the examination of biodiversity-productivity relationships due to the direct link between organisms’ functional traits and their role in a given ecosystem. This study used data from the USDA Forest Service Forest Inventory and Analysis (FIA) database collected in Alabama, Louisiana, and Mississippi to estimate plot-level productivity and diversity. Structural equation modeling was used to determine the …

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Migration Ecology Of American White Pelicans: Circannual Movement, Geographic Range, And Annual Survival, Ryo Ogawa May 2022

Migration Ecology Of American White Pelicans: Circannual Movement, Geographic Range, And Annual Survival, Ryo Ogawa

Theses and Dissertations

Responses of migratory birds to seasonal climate and long-term environmental changes have been a central theme of avian migration ecology. Atmospheric conditions (e.g., winds and thermals), climate, and land cover and land use (LCLU) are major factors influencing the flights of soaring birds. Soaring American White Pelicans (Pelecanus erythrorhynchos) (hereafter, AWPEs) migrate between the subtropical Gulf of Mexico (GOM) and the temperate Northern Great Plains. American White Pelicans are also economically important piscivorous birds, causing enormous damages to the commercial Channel Catfish (Ictalurus punctatus) aquaculture in the Southeastern US. My studies aimed to evaluate the effects …

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Knowing Your Audience: Identifying The Demographic Characteristics, Consumer Trends, Participation Levels, And Activity Preferences Of Mississippi’S Agritourism Clientele, Alexis Kate Turnipseed May 2022

Knowing Your Audience: Identifying The Demographic Characteristics, Consumer Trends, Participation Levels, And Activity Preferences Of Mississippi’S Agritourism Clientele, Alexis Kate Turnipseed

Theses and Dissertations

The implementation of agritourism in the U.S. has increased in recent years. Agritourism provides social and economic benefits to rural communities, leads small-scale farms to achieve financial viability, and offers clientele an entertaining opportunity to meet local producers. Although multiple resources exist to educate individuals interested in pursuing agritourism business ventures, related materials cannot be generalized to Mississippi due to inapplicable data. This study aimed to gain knowledge about Mississippi’s agritourism clientele by administering surveys to attendees of the 2021 Mississippi State Fair. The survey instrument was amended from a previous study conducted by Nasers and Retallick (2009) in Iowa. …

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Assessing Priority Bird Response To Open Pine Management In Eastern Mississippi, Holly Marie Todaro May 2022

Assessing Priority Bird Response To Open Pine Management In Eastern Mississippi, Holly Marie Todaro

Theses and Dissertations

Fire suppression, combined with lack of forest thinning and short-rotation, monodominant management, has drastically altered the landscape in the southeastern U.S., leading to the loss of open pine ecosystems and associated avian species. Management of open pine ecosystems is a common practice; yet, there remains uncertainty regarding how vegetation structure impacts priority species. Using empirical data, I assessed changes in species abundance and associated vegetation characteristics before and after management. I also sought to identify vegetation characteristics that influence home range establishment and microhabitat selection of Bachman’s Sparrows. Priority species were negatively associated with hardwood midstory and abundance per site …

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Improving Deep Neural Network Training With Batch Size And Learning Rate Optimization For Head And Neck Tumor Segmentation On 2d And 3d Medical Images, Zachariah Douglas May 2022

Improving Deep Neural Network Training With Batch Size And Learning Rate Optimization For Head And Neck Tumor Segmentation On 2d And 3d Medical Images, Zachariah Douglas

Theses and Dissertations

Medical imaging is a key tool used in healthcare to diagnose and prognose patients by aiding the detection of a variety of diseases and conditions. In practice, medical image screening must be performed by clinical practitioners who rely primarily on their expertise and experience for disease diagnosis. The ability of convolutional neural networks (CNNs) to extract hierarchical features and determine classifications directly from raw image data makes CNNs a potentially useful adjunct to the medical image analysis process. A common challenge in successfully implementing CNNs is optimizing hyperparameters for training. In this study, we propose a method which utilizes scheduled …

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Growing Tea In Mississippi, Qianwen Zhang May 2022

Growing Tea In Mississippi, Qianwen Zhang

Theses and Dissertations

Tea is the most popular beverage worldwide, second only to water. The United States is the third largest importer of tea in the world, importing a total of about 260 million pounds tea annually. With increased demand for locally sourced food products, questions are raised regarding whether domestic production of tea is feasible. Compared to major tea producing countries with centuries of growing history, tea production in the U.S. is limited and requires research support in many aspects of tea production. The objectives of this study were to investigate plant growth, leaf morphology, and seasonal chemical compositions in tea leaves …

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Analysis And Characterization Of The Volatile Compounds Associated With The Wooden Breast Condition, Hunter Hessler May 2022

Analysis And Characterization Of The Volatile Compounds Associated With The Wooden Breast Condition, Hunter Hessler

Theses and Dissertations

In 2013, the wooden breast defect in broiler breast meat was characterized by hardened and pale areas at both the caudal and cranial regions of the breast. The objective of this study was to determine the flavor differences between severe woody and normal breast meat in both breast and patties using gas chromatography-mass spectrometry, gas chromatography-olfactometry, and sensory descriptive analysis. Forty-eight individual volatile flavor compounds were identified in both the ground and whole breast chicken samples including aldehydes, ketones, and other functional groups. Minimal differences existed in the volatile fraction of normal and severe woody breast meat. In contrast, woody …

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Analysis And Implementation Of Low Fidelity Radar-Based Remote Sensing For Unmanned Aircraft Systems, Matthew Duck May 2022

Analysis And Implementation Of Low Fidelity Radar-Based Remote Sensing For Unmanned Aircraft Systems, Matthew Duck

Theses and Dissertations

Radar-based remote sensing is consistently growing, and new technologies and subsequent techniques for characterization are changing the feasibility of understanding the environment. The emergence of easily accessible unmanned aircraft system (UAS) has broadened the scope of possibilities for efficiently surveying the world. The continued development of low-cost sensing systems has greatly increased the accessibility to characterize physical phenomena. In this thesis, we explore the viability and implementation of using UAS as a means of radar-based remote sensing for ground penetrating radar (GPR) and polarimetric scatterometry. Additionally, in this thesis, we investigate the capabilities and implementations of low-cost microwave technologies for …

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Time To Set Aside 19th Century Tools And Move To The Future: Testing The Portable Osteometric Device Against The Osteometric Board., Eric H. Anderson May 2022

Time To Set Aside 19th Century Tools And Move To The Future: Testing The Portable Osteometric Device Against The Osteometric Board., Eric H. Anderson

Theses and Dissertations

This project tested the reliability and validity of the Portable Osteometric Device Version 1 (PODv1) the Paleo-Tech Lightweight Field Osteometric Board (PaleoTech), by providing measurements of intra-observer and inter-observer error during the collection of osteometric data. The PODv1 is a device that the author invented for measuring anthropometric data from human skeletal material. This device was 3D printed and uses laser sensors with time-of-flight technology to measure distance. Twenty-three different volunteers with various osteological experience from the Mississippi State University community collect osteometric data for this project. These volunteers measured four different bones using both the POD and the PaleoTech …

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Nesting Ecology Of Wood Ducks And Other Cavity-Nesting Ducks In Mississippi, Justin Taylor Gibson May 2022

Nesting Ecology Of Wood Ducks And Other Cavity-Nesting Ducks In Mississippi, Justin Taylor Gibson

Theses and Dissertations

Man-made nest boxes are surrogate nest sites widely used by waterfowl managers in North America to propagate free-ranging Wood Ducks (Aix sponsa) and other cavity-nesting waterfowl. I monitored 129 and 174 nest boxes in 2020 and 2021, respectively, at Noxubee National Wildlife Refuge and York Woods, Mississippi. I evaluated site-specific biotic and abiotic factors that were potentially influential on nest survival of Wood Ducks and general nesting ecology and apparent nest success of Black-bellied Whistling Ducks (Dendrocygna autumnalis) and Hooded Mergansers (Lophodytes cucullatus). Daily survival rate of Wood Ducks was negatively influenced by increasing encroaching vegetation at Noxubee NWR and …

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The Mathematical Foundation Of The Musical Scales And Overtones, Michaela Dubose-Schmitt May 2022

The Mathematical Foundation Of The Musical Scales And Overtones, Michaela Dubose-Schmitt

Theses and Dissertations

This thesis addresses the question of mathematical involvement in music, a topic long discussed going all the way back to Plato. It details the mathematical construction of the three main tuning systems (Pythagorean, just intonation, and equal temperament), the methods by which they were built and the mathematics that drives them through the lens of a historical perspective. It also briefly touches on the philosophical aspects of the tuning systems and whether their differences affect listeners. It further details the invention of the Fourier Series and their relation to the sound wave to explain the concept of overtones within the …

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Effects Of Pruning Timing, Leaf Removal, And Shoot Thinning On 'Midsouth' Winegrape Quality In South Mississippi, Haley Nicole Williams May 2022

Effects Of Pruning Timing, Leaf Removal, And Shoot Thinning On 'Midsouth' Winegrape Quality In South Mississippi, Haley Nicole Williams

Theses and Dissertations

‘MidSouth’, a relatively low maintenance interspecific hybrid bunch grape currently grown in South Mississippi, has low sugar and high acid levels for red wine use. Two studies, conducted at the Mississippi State University McNeill Research Unit in 2020 and 2021, determined the effects of pruning timing, leaf removal, and shoot thinning on ‘MidSouth’ development and fruit and wine quality. Treatments in the first study included early versus normal pruning timing, both with and without leaf removal, and treatments in the second study included leaf removal, shoot thinning, and control vines. Cluster temperatures, leaf chlorophyll, berries per cluster, berry and cluster …

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Quantifying The Economic Impact Of Conservation Policy Changes Utilizing Precision Agriculture Tools, Kyle Stanley Watkins May 2022

Quantifying The Economic Impact Of Conservation Policy Changes Utilizing Precision Agriculture Tools, Kyle Stanley Watkins

Theses and Dissertations

The United States Farm Bill is a multi-billion-dollar federal legislation reenacted every five years to provide funding towards crop protection, nutrition, environmental protection, and other important focuses. The largest conservation program within the Farm Bill is the Conservation Reserve Program, which encompasses many conservation practices such as CP-33: habitat buffers for upland birds. Conservation implementation through the Farm Bill relies on voluntary producer enrollment in exchange for a rental fee to not farm enrolled land for a set time. I used yield data collected across six years from 36 agricultural fields in Humphreys and Holmes counties, Mississippi, USA, and a …

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Health-Related Caretaking In An Institutionalized Setting: Applying The Index Of Care To Burial 1 From The Mid-19th To Early-20th Century Mississippi State Asylum, Jackson, Ms., Darcie Badon May 2022

Health-Related Caretaking In An Institutionalized Setting: Applying The Index Of Care To Burial 1 From The Mid-19th To Early-20th Century Mississippi State Asylum, Jackson, Ms., Darcie Badon

Theses and Dissertations

This project employs a modified version of the Bioarchaeology of Care (BoC) in an analysis of Burial 1 from the Mississippi State Asylum, Jackson, MS. Burial 1 is a skeletal individual recovered from the historic MSA cemetery. Notably, Burial 1 exhibits recidivistic cranial trauma in the form of cranial depression fractures (CDFs) and significant entheseal changes in the upper extremities. However, because there is no identifying information associated with Burial 1, interpretations of the caretaking they may have received, both prior to and after institutionalization, include short- and long-term outcomes from their community and the MSA. Additionally, Burial 1’s CDFs …

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Optimized Selenium Status, Gut Microbiota, And Type 2 Diabetes, Ying-Chen Huang May 2022

Optimized Selenium Status, Gut Microbiota, And Type 2 Diabetes, Ying-Chen Huang

Theses and Dissertations

We have previously demonstrated that long-term dietary Se deficiency in old Terc-/- mice with humanized telomeres induces type-2 diabetes and exacerbates age-dependent increases in the abundance of A. muciniphila and Lachnospiraceae, which are related to obesity and metabolic syndromes. The objectives of this dissertation are: 1) to determine the minimum intake of Se required for type 2 diabetes prevention in middle-aged mice; 2) to evaluate the efficacy of A. muciniphila and R. torques (a Lachnospiraceae family member) to intervene dietary Se deficiency-induced type 2 diabetes and the underlying mechanisms; 3) to assess sex differences in the responses to …

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Recognizing Traffic Signaling Gestures Through Automotive Sensors., Benjamin James Bartlett May 2022

Recognizing Traffic Signaling Gestures Through Automotive Sensors., Benjamin James Bartlett

Theses and Dissertations

As technology advances with each new day, so do the applications and uses of the different modalities of technology, including transportation, particularly in ADAS vehicles. These systems allow the vehicle to avoid collisions, change lanes, adjust the vehicle’s speed, and more without the need of driver input. However, each sensor type has a weakness, and most advanced driver- assisted system (ADAS) vehicles rely heavily on sensors, such as RGB cameras, radars, and LiDAR sensors. These visual-based sensors may collect very noisy data in cloudy, raining, foggy, or other obscuring phenomena. Radar, on the other hand, does not rely on visual …

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Photocatalytic Degradation Of Organic Contaminants By Titania Particles Produced By Flame Spray Pyrolysis, Noah Babik May 2022

Photocatalytic Degradation Of Organic Contaminants By Titania Particles Produced By Flame Spray Pyrolysis, Noah Babik

Theses and Dissertations

Advanced oxidation of organic pollutants with TiO2 photocatalysts is limited due to the wide bandgap of TiO2, 3.2 eV, which requires ultraviolet (UV) radiation. When nanosized TiO2 is modified by carbon doping, charge recombination is inhibited and the bandgap is narrowed, allowing for efficient photodegradation under visible light. Here, we propose a flame spray pyrolysis (FSP) technique to create TiO2. The facile process of FSP has been successful in preparing highly crystalline TiO2 nanoparticles. Using the same procedure to deposit TiO2 onto biochar, the photocatalyst was doped by the carbonaceous material. The morphology, crystalline and electronic structure of the FSP …

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The Effects Of Ecological Simulation For Ground Vehicle Mobility Forecasting, Christopher R. Hudson May 2022

The Effects Of Ecological Simulation For Ground Vehicle Mobility Forecasting, Christopher R. Hudson

Theses and Dissertations

Unmanned ground vehicles (UGV) are being explored for use in military domains. Military UGVs operate in complex off-road environments. Vehicle mobility forecasting plays an important role in understanding how and where a vehicle can operate. Traditional mobility forecasting has been done using an analytical model known as the NATO Reference Mobility Model (NRMM). There has been a push to extend the forecasting capabilities of NRMM by integrating more simulation methods. Simulation enables the repeated testing of UGVs in scenarios that would be difficult or dangerous to study in real world testing. To accurately capture UGV performance in simulation, the operating …

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Assessment Of Mechanical Engineering Skills: A Synthesis Of Industry And Academic Graduate Level Curriculum Requirements, Francie Baker May 2022

Assessment Of Mechanical Engineering Skills: A Synthesis Of Industry And Academic Graduate Level Curriculum Requirements, Francie Baker

Theses and Dissertations

Students who graduate with an advanced degree in mechanical engineering are a diverse group in their path to post-baccalaureate degree attainment. Some students choose to obtain their master’s or Ph.D. post bachelors, but before they enter the workplace. Others enter the workforce and return as full-time students or progress on their advanced degrees while maintaining part- or full-time employment. Current accreditation standards for undergraduate degree programs are part of a changing landscape of standards and professional requirements that have adapted and continue to adapt as programs prepare students to work in professional engineering fields. Advanced degrees do not have the …

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Contextual Creativity: The Role Of Ambiguity In Creative Cognition, Sarah K. C. Dygert May 2022

Contextual Creativity: The Role Of Ambiguity In Creative Cognition, Sarah K. C. Dygert

Theses and Dissertations

This body of work is composed of three individual papers that each seek to explain individual differences in creative cognition. Paper 1 used structural equation modeling to examine the ways in which creative problem solving and creative idea generation relate or differ. Results from Paper 1 demonstrate that divergent thinking and creative problem solving are best represented as a bifactor model, bearing distinct domain-specific factors, as well as a shared domain-general factor. Though working memory and fluency of memory retrieval explained significant portions of the domain-specific constructs, they only explained ~2% of variance in the domain-general factor. Paper 2 explores …

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The Role Of Knowledge Representations In Rule Transfer On A Novel Problem-Solving Task, Megan J. Raden May 2022

The Role Of Knowledge Representations In Rule Transfer On A Novel Problem-Solving Task, Megan J. Raden

Theses and Dissertations

Although the independent roles of working memory capacity (WMC) and knowledge in problem solving have been thoroughly researched, there is significantly less work that has explored how WMC and knowledge interact during problem solving. The present study investigated how the quality of knowledge representations contribute to rule transfer in a problem-solving context and how WMC might contribute to the subsequent failure or success in transferring the relevant information. Participants were trained on individual figural analogies rules and then asked to rate how similar they thought the rules were to determine how stimulispecific or abstract their rule representations were. Their rule …

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