Digital Commons Network^™

The Impact Of Blended Classroom Pedagogy On Student Gpa In A Community College Stem Course, Sarah Mattox Holt

Electronic Theses and Dissertations

America is facing a shortage of STEM workers and colleges must meet the demand by educating qualified graduates. However, attrition rates are high in STEM classes, particularly in minority groups. Blended learning has increased in popularity in higher education over recent years and has the potential to improve current teaching practices. Yet, limited research centers on the success of blended learning implemented in a community college STEM course. This quantitative research study (N=1264) was designed to evaluate student success in the blended learning environment versus traditional environment in an introductory community college biology course for science majors. The study indicated …

Enhancing The Oral Drug Delivery Through Hot Melt Extrusion Techniques, Neeraja Komanduri

Electronic Theses and Dissertations

Hot melt extrusion has been developed as a fresh technique for taste masking, in recent years. This method provides many aids as compared to traditional methods like avoiding the use of solvents, continuous manufacturing, ease to scale up, and adaptability to meet the goals of FDA for quality products. This method is useful for various applications like solubility enhancement, abuse deterrence, taste masking, transdermal dosage forms like films, immediate release oral dosage forms. In this work, This technique is explored for its applications using a novel polymer, Kollicoat® Smartseal 100P and its ability to be coupled with FDM 3D printing …

Development Of Local Depot Formulation For Sustained Systemic Delivery Of Proteins, Pranav Ponkshe

Electronic Theses and Dissertations

Protein therapeutics due to their high potency, high specificity, and desirable profile have gained a lot of traction in the last decade. Though the route of administration is limited to parenteral routes. There are also short half-life and instability issues observed in protein therapeutics making it necessary to develop delivery systems.

In the first chapter interleukin 15 as a cytokine was introduced while the second chapter talks more in detail about the development of a local depot hydrogel formulation for the delivery of recombinant interleukin 15. In vitro stability, and release studies were performed to select the optimum formulation for …

Using Adaptive-Choice Based Conjoint Analysis To Explore Attributes Important In Performance For Division 1 College Football Players, Michaela Marie Slatniske

Electronic Theses and Dissertations

Interdisciplinary teams are essential in the care of collegiate athletes. However, interdisciplinary teams may be composed of members who place utility in key athletic attributes differently. To better understand the differences in utilities various members place on athletic attributes, this study explored the relative importance of attributes in wide receivers (WR), and part-worth utilizes among levels of an attribute through an Adaptive Choice Based Conjoint (ACBC) study. Interdisciplinary team member involved in the care of college football players, including athletic trainers (ATs), ball coaches (BCs), strength and conditioning coaches (S&C), and sports dietitians (SN) were identified from 131 D1 collegiate …

Exploring Non-Covalent Interactions With Quantum Chemical Tools, Morgan Perkins

Electronic Theses and Dissertations

Computational quantum chemistry is an excellent tool for probing properties of all types of chemical systems that are not easily accessible via experimental work. In particular, computational chemistry can be used to develop a better understanding of non-covalent interactions, which are important to a variety of chemical and biological processes. This work focuses primarily on complexes held together by hydrogen and halogen bonding, investigating their relationship to each other and, in a few projects, providing data that can be used for experimental identification of the different configurations. Additionally, comparisons are made between complexes containing first-row elements (e.g. fluorine) and their …

Dye And Redox Shuttle Interactions To Promote Fast Electron Transfer In Dye-Sensitized Solar Cells, Abeysinghe Mudiyanselage Dinesh Bandara Nugegoda

Electronic Theses and Dissertations

Harnessing the sun's power using dye-sensitized solar cells (DSCs) is a possible answer to address the energy challenge. Increasing the performance of DSC devices by increasing the rate of productive electron transfers is critically essential. In this regard, to increase the rate of electron transfers from the redox shuttle to the dye, a strategy of coordinating the redox shuttle through non-covalent interactions such as Lewis acid-Lewis base interactions, π-stacking interactions, and halogen bonding interactions to the dye are considered. DSC devices were fabricated using newly synthesized dyes and redox shuttle pairs to study each strategy. The performance of the devices …

Achieving Record Photocurrent: Strategies For Harvesting And Utilizing Low Energy Photons In Organic Dye-Sensitized Photovoltaics, Jonathon Watson

Electronic Theses and Dissertations

An urgent challenge limiting the improvement of dye-sensitized solar cell (DSC) technology is the availability of chromophores capable of harvesting the full spectrum of solar irradiation; this is especially evident at longer wavelengths. Therefore, the achievable power conversion efficiency (PCE) is effectively capped due to limited photocurrent generation. Molecular design strategies involving proaromaticity and cross-conjugation are employed in this work to facilitate access to low-energy near-infrared (NIR) photons. Utilizing the ubiquitous Donor–p-spacer–Acceptor (D–p–A) architecture, these concepts are studied by incorporating an indolizine donor (RR13 and RR14), and thieno[3,4-b]pyrazine (allowing additional substitution for cross-conjugation, JW1) and thieno[3,4-b]thiophene (AP25) p-spacers. The sensitizers …

On Airborne Tire Wear Particles Along Roads, Labeling Microplastics With Fluorescent Dyes, Microplastics In Wastewater Treatment Plant And Beach Sand, And Microplastic-Mercury Affinity, Zhiqiang Gao

Electronic Theses and Dissertations

Microplastics (MPs) with sizes of 1 μm to 5 mm that are intentional manufactured or result from fragmentation of large plastic debris are widely recognized as a global pollutant. The distributions and concentrations of MPs in environmental and biological systems as well as their toxicity are not well understood. This dissertation details five studies providing new insight and methods on (1) the occurrence and characteristics of airborne tire wear particles (TWPs) along roads, (2) manufacturing and labeling of MPs with fluorescent dyes, (3) fate of MPs in a secondary wastewater treatment plant (WWTP) at the University of Mississippi, (4) distribution …

Interval Delivery Of 5ht2a Agonists Using Multilayered Polymeric Films, Mehjabeen Hossain

Electronic Theses and Dissertations

There is an urgent unmet medical need to develop therapeutic options for the ~50% of depression patients suffering from treatment-resistant depression, which is difficult to treat with existing psycho- and pharmaco-therapeutic options. Classical psychedelics, such as the 5HT2A agonists, have re-emerged as a treatment paradigm for depression. Recent clinical trials highlight the potential effectiveness of 5HT2A agonists to improve mood and psychotherapeutic growth in treatment-resistant depression patients, even in those who have failed a median of four previous medications in their lifetime. Moreover, microdosing could be a promising way to achieve long-term alleviation of depression symptoms without a hallucinogenic experience. …

Examining Perceived Stigma, Disclosure, Self-Compassion, And Health-Related Quality Of Life In College Students With Cystic Fibrosis, Anna R. Hangge

Electronic Theses and Dissertations

Cystic Fibrosis (CF) is a life-limiting genetic disorder that affects the lungs, pancreas, and other organs. Recent advances in CF-related healthcare have improved the life expectancy of individuals with CF from childhood to approximately 50 years old (CFF, 2020). Therefore, more individuals with CF are attending college and facing challenges within this new stage of life. This study examined perceived stigma, disease disclosure, self-compassion, and health-related quality of life (HRQoL) in a sample of current and former college students with CF to understand their psychosocial experience of managing their illness while in college. Results indicated that perceived stigma and HRQoL …

Role Of Host Restriction Factors On Porcine Reproductive And Respiratory Syndrome Virus (Prrsv) Replication, Pratik Katwal

Electronic Theses and Dissertations

In this study, the role of IFITM3 on PRRSV replication was studied in vitro by expressing exogenous IFITM3 in MARC-145 cells. An average of 31% reduction in PRRSV N protein expression and an average of 5.4 fold decrease in virus titer in the supernatant were observed in IFITM3 overexpressing cells as compared to vector control cells at 24 hours post infection (hpi). Moreover, there was a positive correlation between interferon- induced IFITM3 up-regulation and reduced PRRSV replication. To determine the role of endogenous IFITM3 in PRRSV replication, siRNA induced knockdown of IFITM3 was employed. RT-PCR validated the successful silencing of …

Curriculum Development Of Agricultural Educators In South Dakota, Mercedes Lemke

Electronic Theses and Dissertations

Curriculum development is an essential component of teaching. Understanding how agriculture education teachers utilize, develop, and adapt content to curriculum can benefit teachers to spend less time on curriculum development. Recognizing the way agriculture education teachers use content in curriculum implementation will allow curriculum developers to create materials that can effectively be used by teachers. This study also looked at the affects of how COVID19 pandemic affected the way teachers locate and develop curriculum. The purpose of this study was to evaluate the way agriculture education instructor’s usage of content for curriculum development, implementation decisions and the affects of the …

Application Of Pork Checkoff We Care Sustainability Principles To Pork Production: Water, Nutrition, And Biosecurity, Hannah Miller

Electronic Theses and Dissertations

The Pork Checkoff program was founded in 1986 as a means to strengthen U.S. pork in the market place (Pork Checkoff). Under this program all U.S. pork producers and importers pay $0.40 for every $100 worth of pigs is sold (Pork Checkoff). Funds are then used for pork promotion, research, and education for producers and consumers (Pork Checkoff). The Pork Checkoff program uses the We Care ethical principles as a means to address “continuous improvement in the pork industry’s production practices and promote a strong record of responsible farming to those outside of the industry” (National Pork Board, 2018a). The …

Decoding The Mystery Of Antibiotic Persistence, Tahmina Hossain

Electronic Theses and Dissertations

This work combines microbiology, molecular biology, Next-Generation Sequencing and system biology approaches to explore the mechanism of antibiotic persistence: a multi-drug tolerant, non-dividing, and metabolically altered state present in a subpopulation of cells due to phenotypic diversity rather than genetic variation (i.e. mutations). Persister can survive lethal antibiotic state and resuscitate after the treatment period is over. They are considered as the major contributing factor behind recurring infections. They also have a high mutation rate, which increases the chances of bacteria gaining antibiotic resistance. The formation of this phenotypic variant (persister) threatens the therapeutic effectiveness of antibiotics and understanding how …

Effect Of Essential Oils In The Control Of Fungal Diseases In Small Grains, Esneider Mahecha Bojaca

Electronic Theses and Dissertations

Spring wheat (Triticum aestivum L.) and oats (Avena sativa L.) are important crops due to their high consumption in our daily diet worldwide. They are the main food of consumption per capita due to the high amino-acid content as well of vitamins. However, grain production is limited due to the negative impact of the diseases that cause significant yield loss. Diseases in oats, such as crown rust caused by Puccinia coronata f. sp. avenae (Pca), and in wheat such as Fusarium head blight (FHB) caused by the fungus Fusarium graminearum. Foliar diseases such as tan spot incited by the fungi …

High Protein Yeast-Based Ddgs As An Alternative To Commonly Used Protein Sources In Pig Diets, Yesid Ricardo Garavito Duarte

Electronic Theses and Dissertations

Alternative ingredients and co-products from ethanol and biofuel industries represent an opportunity for utilization in swine diets. In this context, understanding nutritional value to practical swine feeding begins with product characterization and determination of nutrient digestibility. The objective of this research was to test the hypothesis: yeast-based high-protein DDGS (HP-GDDY) has comparable AA and metabolizable energy (ME) digestibility to feedstuffs commonly used in swine diets and that it could be included as an alternative protein source in nursery diets without negative impact on growth performance. Cornstarch-based diets were formulated using six ingredients as the sole source of AA: spray dried …

Phomopsis Stem Canker Of Sunflower (Helianthus Annuus L.): Etiology And Epidemiological Conditions Affecting Endophytic Population Of Diaporthe Spp., And Fungicide Efficacy, Nabin Kumar Dangal

Electronic Theses and Dissertations

Phomopsis stem canker (PSC), caused by species of Diaporthe, is a major disease of sunflower (Helianthus annuus L.) in the U.S., which can cause yield loss over 40%. The disease prevalence increased since 2010 in the major sunflower producing U.S. states of Nebraska, Minnesota, North Dakota, and South Dakota. Previous studies on the use of foliar fungicides in managing Phomopsis stem canker indicated mixed results on their efficacy in disease reduction and yield gain. Additionally, we do not have sufficient information on asymptomatic colonization by endophytic Diaporthe on sunflower tissue and how foliar fungicide and weather parameters affect the prevalence …

Optimization Based Parameter And State Estimation Framework For Remote Microgrid Frequency Dynamics Modeling Using Probing Signals From Energy Storage Systems, Manisha Rauniyar

Electronic Theses and Dissertations

The primary aim of this thesis is to deliver an efficient design and selection of probing signal needed to estimate state and parameters representing the power system frequency dynamics with the proposed estimation technique in real-time with minimum computational time and cost. These test cases are designed for power system researchers that need to estimate and control analysis at the remote microgrid level. Case studies are presented that can be simulated at the transmission and distribution level in power grids, and in remote isolated microgrids where the independent system operator (ISO) has control. Increasing utilization of renewable energy sources and …

Study Of Root System Architectural Traits Of Oat And Response To Endophyte Inoculation And Drought Stress, Krishna Ghimire

Electronic Theses and Dissertations

Oat is an important cereal crop grown worldwide. Oats have the potential to contribute to human health due to their unique nutritional attributes. Developing oat cultivars with efficient root systems able to extract heterogeneously distributed soil resources can help maintain yield under drought conditions and in nutrient poor soil. Various root traits determine the soil volume that is explored by the root system for resource acquisition. Knowledge about the genetic control of oat root traits and response to biotic and abiotic environmental factors is lacking. Identifying quantitative trait loci associated with root traits and understanding the response of roots to …

Determining The Impact Of Corn Source On Nutrient Availability And Pig Performance, And Improving Boar Performance During Heat Stress, Jordan Jansen

Electronic Theses and Dissertations

The quality and effectiveness of the feedstuffs included in diets of production livestock directly impact yield efficiency and performance characteristics desired by producers. This thesis focuses on the performance and digestibility of corn from different countries in pig diets and how different feed additives can be supplemented to improve boar reproductive performance during heat stress. Corn is the largest energy source in common pig diets. The physical characteristics of corn such as broken kernels, foreign material, and excessive dust are said to negatively impact the quality of the grain for pig diets by being less digestible and a worsened nutrient …

Identifying Sources Of Resistance And Fungicide Efficacy Against Fungi Causing Phomopsis Stem Canker In Sunflower, Renan Guidini

Electronic Theses and Dissertations

Phomopsis stem canker is a major threat to sunflower (Helianthus annuus L.) production worldwide and its prevalence has increased from 1.5% in 2001 to 61.0% in 2015 in the sunflower producing U.S. states of Colorado, Kansas, Minnesota, Nebraska, North Dakota, South Dakota, and Texas. The disease causes early senescence and lodging of sunflower plants resulting in yield losses up to 40% and oil content up to 25%. Several species of Diaporthe have been reported to cause Phomopsis stem canker. In the United States, Diaporthe helianthi Munyt.-Cvetk. et al. and D. gulyae Shivas et al., have been reported as predominant causal …

Formulation, Structure, And Applications Of Therapeutic, Amino Acid, And Water-Based Deep Eutectic Solvents, Md Sajjadur Rahman

Electronic Theses and Dissertations

In the design of greener chemicals, deep eutectic solvents (DESs) are considered as one of the most versatile alternative solvents with widespread applications. DESs have the advantages of being nonflammable with negligible vapor pressure compared to traditional solvents. They share many characteristics of ionic liquids, but DESs are cheaper to formulate, typically nontoxic, recyclable, biodegradable, and are suitable for use with biological systems. In my Ph.D. research, three types of emerging and unconventional types of DESs, namely therapeutic DES (THEDES), amino acid-based DES (AADES), and water-based DES (WDES), have been investigated. To formulate these DES easily available and cheaper chemicals, …

Identity Negotiations In Family Relationships: Discussing Substance Use Disorder Through The Communication Theory Of Identity, Sarah-Michele Q. Weaver

Electronic Theses and Dissertations

Guided by the communication theory of identity (CTI), the current study explores identity negotiations among family members who have experience with substance use disorder. Semi-structured interviews were conducted with 9 participants. Personalenacted, enacted-relational, and personal-relational identity gaps guide the scope and use of CTI. Findings mirrored 3 major themes in consideration of these identity gaps: (1) participants embraced or rejected SUD as a central aspect of personal identity, (2) participants experienced turbulence in relational identities due to SUD, and (3) personalrelational identity gaps and alignment surface in multiple contexts where interpersonal communication occurs.

Soil Hydro-Physical Properties, Computed Tomography Measured Pore Parameters, And Soil Health Indicators As Influenced By Tillage And Crop Rotation Systems, Goutham Thotakuri

Electronic Theses and Dissertations

Long-term tillage and crop rotation systems are important agricultural management practices as these can have direct impact on the soil’s key properties. The objectives of this study were to (ⅰ) quantify the soil pore characteristics under long-term tillage and crop rotation using X-ray computed tomography (XCT) and to assess the relationships between XCT-measured pore parameters and soil hydro-physical properties; and (ⅱ) evaluate the impacts of long-term tillage and crop rotation on select soil health indicators. The objective (ⅰ) was carried out at Haskell Agricultural Laboratory (HAL), Concord, NE; and objective (ⅰi) was carried out at South Central Agricultural Laboratory (SCAL), …

Impact Of Storage Conditions And Varieties On The Composition, Physical Properties, And Functionality Of Dry Peas, Sushmita Karki

Electronic Theses and Dissertations

Dry peas are sustainable, healthy, and nutritious pulse crop and are excellent source of protein and complex carbohydrates as well as micronutrients. The effects of storage conditions on composition of beans and cereals have been widely reported. The information gained contributed significantly to better storage practices for these commodities. However, literature addressing the chemical composition, functionality, and physical characteristics of dry pea seeds upon storage is scarce. This study was designed to address the impact of storage conditions and varieties on the nutrient profile, functionality, and physical properties of dry pea seeds. Six different varieties of dry peas were stored …

Study On Performance Of Pruned Cnn-Based Classification Models, Mengling Deng

Electronic Theses and Dissertations

Convolutional Neural Network (CNN) is a neural network developed for processing image data. CNNs have been studied extensively and have been used in numerous computer vision tasks such as image classification and segmentation, object detection and recognition, etc. [1] Although, the CNNs-based approaches showed humanlevel performances in these tasks [2], they require heavy computation in both training and inference stages, and the models consist of millions of parameters. This hinders the development and deployment of CNN-based models for real world applications. Neural Network Pruning and Compression techniques have been proposed [3, 4] to reduce the computation complexity of trained CNNs …

Production Of Calcium Reduced Micellar Casein Concentrate Powders And Their Use In Process Cheese Products, Anil Kommineni

Electronic Theses and Dissertations

Protein is an essential dietary component, and sufficient intake is vital in a healthy and balanced diet. Consumers are becoming increasingly aware of and knowledgeable about the role of protein in the diet. Two of the next-generation dairy protein ingredients isolated from milk are micellar casein (MCC) and milk-derived whey protein, isolated from skim milk using microfiltration (MF). Membrane filtration has been used extensively by the dairy industry to produce a variety of dairy ingredients from milk. MCC manufactured from freshly pasteurized milk can be directly consumed or as a supplement to fortify and enhance nutritional qualities in processed food …

A Non-Reacting Passive Scalar Comparison Of Starccm And Openfoam In A Supersonic Cavity Flame Holder, Thomas Nuese

Electronic Theses and Dissertations

The scramjet engine equipped with a modern-day airliner would allow for very quick travel across the United States. The major problem is that designing such an engine and testing it to make sure it is safe would cost millions if not billions of dollars. Computational fluid dynamics allows for complex designs to be tested but can still take many days, weeks, or even months to complete. With the use of computational fluid dynamics (CFD), the scramjet engine can be analyzed to determine a quicker way to test and develop a reliable configuration in addition to analyzing the effects of different …

It's Not Just No-Till: Crop Rotations Are Key To Improving Soil Quality And Grain Yields At Dakota Lakes Research Farm, Natalie Sturm

Electronic Theses and Dissertations

No-till is increasingly promoted as a vital agricultural practice to address the challenge of improving soil quality while maintaining the ability to produce food, feed, fuel, and fiber. However, questions remain regarding 1) how different crop rotations impact soil quality under no-till management specifically and 2) whether significant improvements in soil quality can be made without negatively impacted crop yields. In this study, we demonstrate that even under the same long-term no-till management, differences in grain yields and soil biological, chemical, and physical properties exist between crop rotations at Dakota Lakes Research Farm in central South Dakota. We propose that …

Repairable Precast Bridge Bents For Seismic Events, Kallan Hart

Electronic Theses and Dissertations

Concrete bridge columns are designed to withstand earthquakes by undergoing large displacements. Current seismic bridge codes guarantee collapse prevention, but damage to concrete and longitudinal reinforcement often requires demolition of the structure. Repairable detailing and advanced bridge construction connections may be utilized in concrete bridge columns to allow for quick construction as well as replacement of damaged reinforcement after an earthquake. This detailing may be an attractive alternative to bridge owners to reduce construction and replacement costs as well as ensure the functionality of critical routes after an earthquake. Three repairable precast bridge columns with exposed longitudinal reinforcement were tested …