Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Electronic Theses and Dissertations

Discipline
Institution
Keyword
Publication Year
File Type

Articles 10051 - 10080 of 35662

Full-Text Articles in Entire DC Network

Development Of Polylactic Acid (Pla)-Based Nanocomposite Films For Smart Food Packaging Applications, Zeyad Albahr Jan 2018

Development Of Polylactic Acid (Pla)-Based Nanocomposite Films For Smart Food Packaging Applications, Zeyad Albahr

Electronic Theses and Dissertations

Most of current food packaging resources are non-renewable and nonbiodegradable. The use of these materials has resulted in serious environmental issues. In recent years, the recognition of waste disposal problems and their impacts on the environment has risen the demand for packaging manufactured from renewable materials. However, there are some limitations of using biopolymers for food packaging applications. These limitations include unreliable mechanical and barrier properties. These issues may be addressed by combining biopolymers and nanotechnologies. Nanotechnologies are expected to improve the performance of biopolymer-based packaging materials for food packaging applications. Cellulose nanocrystals (CNC) has shown a potential to be …


Localization Of Microcalcification On The Mammogram Using Deep Convolutional Neural Network, Jieun Jhang Jan 2018

Localization Of Microcalcification On The Mammogram Using Deep Convolutional Neural Network, Jieun Jhang

Electronic Theses and Dissertations

Breast cancer is the most common cancer in women worldwide, and the mammogram is the most widely used screening technique for breast cancer. To make a diagnosis in the early stage of breast cancer, the appearance of masses and microcalcifications on the mammogram are two crucial indicators. Notably, the early detection of malignant microcalcifications can facilitate the diagnosis and the treatment of breast cancer at the appropriate time. Making an accurate evaluation on microcalcifications is a timeconsuming and challenging task for the radiologists due to the small size and the low contrast of microcalcification. Compared to the background and mammogram …


Impacts Of Diverse Crop Rotations And Integrated Crop-Livestock System On Soil Quality In South Dakota, Atilla Polat Jan 2018

Impacts Of Diverse Crop Rotations And Integrated Crop-Livestock System On Soil Quality In South Dakota, Atilla Polat

Electronic Theses and Dissertations

Crop diversification can be beneficial in improving soil quality parameters. Diverse crop rotations and integrated crop-livestock systems (ICLS), are two examples of crop diversification used in this study to assess soil quality. The objectives of this study were to: (i) assess the impacts of diverse rotations on soil quality parameters, and (ii) assess the impacts of low and high stocking density on soil quality parameters. Both of the studies were conducted separately and are presented as two different chapters. To accomplish objective (i), a long-term experiment was selected which was established near Brookings, South Dakota, USA at USDA-ARS lab in …


Methodology For Load Rating Double-Tee Girder Bridges, Sandip Rimal Jan 2018

Methodology For Load Rating Double-Tee Girder Bridges, Sandip Rimal

Electronic Theses and Dissertations

The most common type of bridge on South Dakota (SD) local roads is precast prestressed double-tee (DT) girders. More than 700 DT bridges are currently in-service in SD. Structural detailing, aging, traffic volume, and environmental conditions affect the structural performance, integrity, and capacity of DT bridges. When a bridge is affected by one or more of the aforementioned parameters, the estimation of the bridge safe live loads is necessary to ensure the safety of the traveling public and to prevent excessive bridge damage and collapse. Load rating of damaged bridges is challenging mainly because of a lack of information regarding …


Soybean Iron Deficiency Chlorosis: Quantitative Trait Locus Validation And Grain Yield Evaluation, Ahmed Charif Jan 2018

Soybean Iron Deficiency Chlorosis: Quantitative Trait Locus Validation And Grain Yield Evaluation, Ahmed Charif

Electronic Theses and Dissertations

Soybean production in most of the Northern Great Plain area has been challenged by iron deficiency chlorosis (IDC), which is a physiological problem with a plant grown in high pH, calcareous soil. Developing IDC-resistant cultivars is the best approach to meet this challenge. Currently, this approach is limited by lack of knowledge about genetic resources and mechanisms for resistance to IDC. The objectives of this research were to validate quantitative trait loci (QTL) associated with IDC and to evaluate the effect of IDC on yield in soybean cultivars. To validate the QTL, a population of 201 recombinant inbred lines, which …


Case Report: A Novel Ocular Screening Aid For Detection Of Sport-Related Concussion In High School Athletes, Payton Monson Jan 2018

Case Report: A Novel Ocular Screening Aid For Detection Of Sport-Related Concussion In High School Athletes, Payton Monson

Electronic Theses and Dissertations

Objective: The purpose of this study was to develop, implement and determine the general effectiveness of a novel battery of ocular tests referred to as the Rapid Ocular Screening Test (ROST) that can be performed efficiently on the sideline and is based on our current understanding of the physiological effects of blunt head trauma on ocular functioning.
Background: Assessment of ocular function following a suspected head-injury has been recognized as an important adjunct to a concussion evaluation protocol; however, sideline-screening recommendations currently do not include a comprehensive set of ocular functioning tests. Three high school student athletes who suffered a …


Evaluation Of An Essential Oil Blend And A Novel Soybean Variety As Alternatives To Preventative Antibiotic Use In Monogastrics, Samantha Tauer Jan 2018

Evaluation Of An Essential Oil Blend And A Novel Soybean Variety As Alternatives To Preventative Antibiotic Use In Monogastrics, Samantha Tauer

Electronic Theses and Dissertations

Increasing consumer pressure to minimize antibiotic use and the implementation of the Veterinary Feed Directive in 2017 has increased research on alternatives to preventative antibiotics. This thesis focuses on evaluation of Ralco’s Microfused™ Essential Oils (MEO) fed to broilers and soybean meal from low allergenicity soybeans fed to weaned pigs and their potential use as alternatives to antibiotics. Essential oils are known to have antimicrobial, antioxidant, antiparasitic, and digestive stimulant effects. Low allergenicity (LA) soybeans were bred to contain significantly lower concentrations of the following anti-nutritional factors and allergenic proteins: Kunitz trypsin inhibitor, soybean agglutinin (lectin), and P34 (Gly m …


Stability Analysis Of Immunogenic Gliadin Accumulation In Hard Red Spring Wheat (Triticum Aestivum L.), Stacy Lindblom-Dreis Jan 2018

Stability Analysis Of Immunogenic Gliadin Accumulation In Hard Red Spring Wheat (Triticum Aestivum L.), Stacy Lindblom-Dreis

Electronic Theses and Dissertations

Misconceptions regarding plant breeding objectives have led to speculation regarding the increasing prevalence of gluten intolerance, wheat allergy, and celiac disease. It is thought that contemporary wheat cultivars accumulate more immunogenic proteins than older cultivars because of supposed genetic changes effected through plant breeding strategies. This study evaluated the stability of gliadin accumulation in 191 hard red spring wheat cultivars grown in 12 location-years. Two enzyme-linked immunosorbent assays (ELISAs) were developed. A paired t test (N = 34) failed to find a statistically significant difference between the experimental ELISAs and the commercial R5 assay measures of mean gliadin (t = …


An Approach To Finding Parking Space Using The Csi-Based Wifi Technology, Yunfan Zhang Jan 2018

An Approach To Finding Parking Space Using The Csi-Based Wifi Technology, Yunfan Zhang

Electronic Theses and Dissertations

With ever-increasing number of vehicles and shortages of parking spaces, parking has always been a very important issue in transportation. It is necessary to use advanced intelligent technologies to help drivers find parking spaces, quickly. In this thesis, an approach to finding empty spaces in parking lots using the CSI-based WiFi technology is presented. First, the channel state information (CSI) of received WiFi signals is analyzed. The features of CSI data that are strongly correlated with the number of empty slots in parking lots are identified and extracted. A machine learning technique to perform multi-class classification that categorizes the input …


“The Problem With The Haitians Is Their Language”: Language As Color-Blind Racism, Ruthie Wienk Jan 2018

“The Problem With The Haitians Is Their Language”: Language As Color-Blind Racism, Ruthie Wienk

Electronic Theses and Dissertations

This project explores the mechanisms of exclusion and oppression of a Haitian population in a rural community in South West Florida. The analytical approach taken is an analysis of the social field and habitus as dispositions and embodied culture. Language has been identified as a tool to marginalize the population in the general social order. Through this process, language operates as a form of color-blind racism which justifies the exclusion of the Haitian community but is insufficient in explaining their overall social outcomes. Qualitative data were collected for this project in the form of unstructured interviews, focus groups, photographs of …


Relationship Of Physical Health Risk Screenings In Seriously Mentally Ill With Self-Efficacy For Health, Perception Of Health Risk, And Intention To Follow-Up With Medical Care., Dawn (Vanruler) Bos Jan 2018

Relationship Of Physical Health Risk Screenings In Seriously Mentally Ill With Self-Efficacy For Health, Perception Of Health Risk, And Intention To Follow-Up With Medical Care., Dawn (Vanruler) Bos

Electronic Theses and Dissertations

Morbidity and mortality occur at higher rates in those with serious mental illness (SMI) than those without SMI. These higher rates are worsening in degree, despite known preventative strategies, such as physical health risk screening (HRS). This study evaluates the relationship of physical HRS with self-efficacy for health prevention behaviors, perception of level of risk of health consequences, and intention to follow up with medical care for identified health risks. The study considers Protection Motivation Theory (PMT) factors related to HRS in individuals with SMI. A HRS tool was administered to 54 adult ambulatory clients from the Midwestern United States …


Expression Analyses And Identification Of Key Molecular Participants In Plant Responses To Environmental Cues, Praveena Kanchupati Jan 2018

Expression Analyses And Identification Of Key Molecular Participants In Plant Responses To Environmental Cues, Praveena Kanchupati

Electronic Theses and Dissertations

Plants constantly engage and interact with the environment and respond to the changes in conditions like temperature, water, and photoperiod, by regulating expression of genes of multiple regulatory and signaling pathways. Insight into these pathways and their participants has provided and will provide candidates to improve various agronomically important traits in crops through marker-assisted breeding and genetic manipulation. With this aim in mind, in the present study, I attempted to identify key candidate genes that are involved in the regulation of; i) plant response to low temperature stress, ii) plant roots’ response to soil moisture content and iii) flowering time. …


Urban Gardens And Nutrition In Sioux Falls, Sd, Austin Brynjulson Jan 2018

Urban Gardens And Nutrition In Sioux Falls, Sd, Austin Brynjulson

Electronic Theses and Dissertations

With the global population recently surpassing seven and a half billion, questions about feeding the population have emerged. In the past, increased demand for food was addressed through increasing intensification of land use and increasing the area of land under cultivation. Despite these efforts, food insecurity has increased for much of the population over this period, where, according to the USDA, in the U.S. 49.1 million people were food insecure in 2013. Food insecurity in this regard is the lack of access to sufficient, safe, and nutritious food at all times. While the complex global food system may be difficult …


Role Of Non-Muscle Myosin Ii In Hs578t/Hs578ts(I)8 Triple Negative Breast Cancer Progression, Shimara Gunawardana Jan 2018

Role Of Non-Muscle Myosin Ii In Hs578t/Hs578ts(I)8 Triple Negative Breast Cancer Progression, Shimara Gunawardana

Electronic Theses and Dissertations

Loss of cell-cell adhesion and migration are prerequisites for the formation of metastases. These events are mediated by changes in the actomyosin cytoskeleton. Nonmuscle myosin II (NMII) belongs to the myosin superfamily of motor proteins which binds to actin and controls actin cross-linking and contraction, however its role and regulation in cell-adhesion and migration remains poorly understood. In this study, we report that associations of α5β1integrin receptors and Ncadherins with NMII isoforms NM-IIA and NMII-B correlate with increased cell-cell adhesion and reduced migratory behavior of the parental Hs578T cells of the Hs578T/Hs578Ts(i)8 triple-negative breast cancer progression model. Using blebbistatin, a …


The Role Of Genomic Versatility In Multi-Niche Preferences Of Escherichia Coli, Gitanjali Nandakafle Jan 2018

The Role Of Genomic Versatility In Multi-Niche Preferences Of Escherichia Coli, Gitanjali Nandakafle

Electronic Theses and Dissertations

Escherichia coli strains are naturally present as either commensals or pathogens in the gastrointestinal tract of mammals and some other vertebrates. Until recently, it was assumed that E. coli are solely associated with the gut and are unable to survive outside of a host for a long period of time, the basis of its use as an indicator organism. Recent reports suggest that E. coli can become naturalized to several tropical, subtropical or temperate soils and aquatic environments, where they have been isolated repeatedly. Several studies have shown that these strains are capable of surviving and proliferating in the environment …


Walleye Fishery Ecology In Lake Oahe Of The Dakotas, Eli Felts Jan 2018

Walleye Fishery Ecology In Lake Oahe Of The Dakotas, Eli Felts

Electronic Theses and Dissertations

Walleye Sander vitreus is among the most popular sport fishes in North America and is the most sought-after fish in both South Dakota and North Dakota. Lake Oahe, a large main stem Missouri River reservoir, spans state boundaries and provides one of the most popular and productive Walleye fisheries in both Dakotas. The Walleye population of Lake Oahe has experienced wide fluctuations in abundance and size structure over the last 25 years which has caused high variability in angler use and satisfaction. Much of this variation is thought to be driven by Rainbow Smelt Osmserus mordax, which are the dominant …


Fast Isotope Ratio Mass Spectrometry (Firms): A Tandem Mass Spectrometry Technique For The Rapid And Semi-Comprehensive Evaluation Of Isotope Ratios, Fredrick Ochieng Jan 2018

Fast Isotope Ratio Mass Spectrometry (Firms): A Tandem Mass Spectrometry Technique For The Rapid And Semi-Comprehensive Evaluation Of Isotope Ratios, Fredrick Ochieng

Electronic Theses and Dissertations

Isotope ratios (IRs) are a measure of the variation in abundance of light isotopes versus heavy isotopes of an element, e.g. 1H/2H,12C/13C, and 14N/15N. Because IRs change as a molecule undergoes certain chemical and physical processes, they represent unique fingerprints that can be used to trace the source of a chemical compound. Current techniques for determination of IRs each have major limitations, such as loss of structural information, vulnerability to contamination, high cost, large sample size requirements, low precision, limited applicability, and lengthy analysis. Fast Isotope Ratio Mass Spectrometry (FIRMS) …


Laboratory Evaluation Of Internal And External Nutrient Removal To Control Algal Bloom In Eutrophic Lakes, Sepideh Sadeghi Jan 2018

Laboratory Evaluation Of Internal And External Nutrient Removal To Control Algal Bloom In Eutrophic Lakes, Sepideh Sadeghi

Electronic Theses and Dissertations

Eutrophication is one of the most widespread water quality problems in lakes and reservoirs. Frequent cyanobacterial blooms resulting from eutrophication can greatly damage aquatic ecosystems and pose a high risk to human health. Phosphorus (P) and nitrogen (N) are the major causes for eutrophic conditions and can enter to the aquatic ecosystem via different sources. The combination of phosphorus precipitation and sediment capping are promising technologies to minimize internal P loading and control harmful algal blooms in eutrophic lakes. Denitrification bioreactors have emerged as an important edge-of-field treatment technology to reduce nitrate-nitrogen loads from external sources. The objective of this …


#Rest In Digital Peace: Examining Attachment Dimensions' Relationship To Grief Messages On Facebook, Kendall Uhrich Jan 2018

#Rest In Digital Peace: Examining Attachment Dimensions' Relationship To Grief Messages On Facebook, Kendall Uhrich

Electronic Theses and Dissertations

Grief is a natural reaction to loss that can include behaviors and thoughts that are emotional, physical, and spiritual (DeSpelder & Strickland, 2015). With the rise of social media, grief is now performed in a different and more public manner. The current literature has established the connection between how one grieves and their attachment dimension of either attachment anxiety or attachment avoidance (Bowlby, 1980; Schenck, Eberle, & Rings, 2016; Waskowic & Chartier, 2003; Worden, 1983). Attachment dimensions have also been correlated with social media usage, primarily the use of Facebook (Hart, Nalling, Bizer, & Collins, 2015; Lin, 2015). Findings from …


Assessment And Development Of Cold Temperature Germination Tolerance In Oat And Hard Red Spring Wheat, Jacob Baustian Jan 2018

Assessment And Development Of Cold Temperature Germination Tolerance In Oat And Hard Red Spring Wheat, Jacob Baustian

Electronic Theses and Dissertations

Oat (Avena Sativa) and hard red spring wheat (HRSW; Triticum aestivum L.) are both spring planted cereal crops that yield best when planted early in the spring. These crops would benefit from improvements in cold temperature germination tolerance (CTGT) by allowing them faster and more uniform germination and emergence early in the spring. This study aimed to (i) evaluate germination in oat genotypes over a range of sub-optimal temperatures and (ii) establish a methodology for selection of hard red spring wheat for CTGT. Seed samples of ten different oat genotypes were evaluated for CTGT in a germination chamber …


Soybean Aphid Biotype 4 Resistance In Soja And Soybean Plant Introductions, Sophia R. Conzemius Jan 2018

Soybean Aphid Biotype 4 Resistance In Soja And Soybean Plant Introductions, Sophia R. Conzemius

Electronic Theses and Dissertations

Soybean aphid, Aphis glycines Matsumura, is a major pest to soybean, Glycine max (L.) Merr. Host plant resistance is a management tactic that uses naturally occurring soybean plant defenses to limit soybean aphid pest damage. Virulent soybean aphid biotypes are able to successfully colonize on certain aphid resistant soybean. Soybean aphid biotype 4 is most virulent, overcoming all commercially available soybean aphid resistant soybeans (Rag1, Rag2, and Rag1+Rag2). Additional sources of resistance to avirulent biotypes have been identified in soja and soybean plant introductions (PIs). This study examined those resistant soja and soybean for resistance to the newly found soybean …


Determinants Of Tipping Behavior: Evidence From Us Restaurants, Nusrat Jahan Jan 2018

Determinants Of Tipping Behavior: Evidence From Us Restaurants, Nusrat Jahan

Electronic Theses and Dissertations

This study aims to analyze people’s tipping behavior to assess the factors that determine both the likelihood of leaving a tip and tip size in US restaurants. A total 2,334 away from home eating events are considered in this study based on the nationally representative National Household Food Acquisition and Purchase Survey (FoodAPS) dataset. Two different tipping scenarios are considered for full-service restaurants to examine differences in customers’ behavior under two different situations. Considering that households’ tipping decisions and tip sizes are functions of the demand for personal interest (D"#, ) and the demand for social interest (D&#), different socio-demographic, …


A Study Of African Savanna Vegetation Structure, Patterning, And Change, Christoffer R. Axelsson Jan 2018

A Study Of African Savanna Vegetation Structure, Patterning, And Change, Christoffer R. Axelsson

Electronic Theses and Dissertations

African savannas cover roughly half of the continent, are home to a great diversity of wildlife, and provide ecosystem services to large populations. Savannas showcase a great diversity in vegetation structure, resulting from variation in climatic, edaphic, topographic, and biological factors. Fires play a large role as savannas are the most frequently burned ecosystems on Earth. To study how savanna vegetation structure shifts with environmental factors, it is necessary to gather site data covering the full gradient of climatic and edaphic conditions. Several earlier studies have used coarse resolution satellite remote sensing data to study variation in woody cover. These …


Mapping And Risk Assessment Of Juniper Encroachment Into A Prairie Landscape, Kyle D. Kaskie Jan 2018

Mapping And Risk Assessment Of Juniper Encroachment Into A Prairie Landscape, Kyle D. Kaskie

Electronic Theses and Dissertations

Juniper encroachment is a considerable threat to the prairie ecosystems of the Great Plains because it has the potential to alter native grasslands by changing soil characteristics, limiting herbaceous biomass, and hindering native community regeneration. Accurate maps of juniper cover and predictions of areas at risk for future expansion are needed to support proactive management measures. Therefore, our objectives are to: (1) Develop a practical workflow for large-scale juniper mapping using Landsat 8 Operational Land Imager (OLI) imagery and partial unmixing techniques, (2) Compare the classification accuracies from the resulting map based on different juniper density thresholds and different types …


Microbial Communities And Their Impact On Bioenergy Crops In Dynamic Environments, Brandon Monier Jan 2018

Microbial Communities And Their Impact On Bioenergy Crops In Dynamic Environments, Brandon Monier

Electronic Theses and Dissertations

Native perennial grasses, such as prairie cordgrass (PCG, Spartina pectinata Link), and switchgrass (SG, Panicum virgatum L.) have a great potential as bioenergy crops, because they require fewer inputs, produce more energy, and reduce greenhouse gas emissions in comparison to annual cropping systems such as corn and soybean. SG has been selected by the U.S. Department of Energy for development as bioenergy crop, but studies have shown that PCG can outcompete switchgrass in terms of biomass production. These crops can also form associations with a wide variety of plant growth promoting microbes including arbuscular mycorrhial (AM) fungi. In CHAPTER 2, …


Wi-Fi Finger-Printing Based Indoor Localization Using Nano-Scale Unmanned Aerial Vehicles, Appala Narasimha Raju Chekuri Jan 2018

Wi-Fi Finger-Printing Based Indoor Localization Using Nano-Scale Unmanned Aerial Vehicles, Appala Narasimha Raju Chekuri

Electronic Theses and Dissertations

Explosive growth in the number of mobile devices like smartphones, tablets, and smartwatches has escalated the demand for localization-based services, spurring development of numerous indoor localization techniques. Especially, widespread deployment of wireless LANs prompted ever increasing interests in WiFi-based indoor localization mechanisms. However, a critical shortcoming of such localization schemes is the intensive time and labor requirements for collecting and building the WiFi fingerprinting database, especially when the system needs to cover a large space. In this thesis, we propose to automate the WiFi fingerprint survey process using a group of nano-scale unmanned aerial vehicles (NAVs). The proposed system significantly …


Evaluation Of Berberine As An Alternative To Antibiotics In Nursery Pig Diets, Emily Scholtz Jan 2018

Evaluation Of Berberine As An Alternative To Antibiotics In Nursery Pig Diets, Emily Scholtz

Electronic Theses and Dissertations

Pig weaning process results in reduced growth performance and gut health of weaned pigs. Antibiotics can be added in diets for weaned pigs to improve growth performance and gut health, but their use is being discouraged because they can lead to development of antimicrobial resistant microorganisms. Thus, there is need for alternatives to antibiotics in diets for weaned pigs. The overall goal of this thesis research was to determine the effects of plant extracts (berberine, quercetin, and allyl isothiocyante [AITC]) as alternatives to antibiotics in weaned pig diets. The first objective of the research was to determine in vitro antimicrobial …


What Is The Value Of Corn Residue To Grazing Cattle?, Emily Ann Petzel Jan 2018

What Is The Value Of Corn Residue To Grazing Cattle?, Emily Ann Petzel

Electronic Theses and Dissertations

The United States produces over 370,840,000,000 kg of corn grain and concomitantly more than 303,410,000,000 kg DM of non-grain corn residues (i.e., leaves, husks and stalk) from grain production annually. Although there is an abundance of available corn residue, only 12% of land planted to corn is grazed after harvest (Schmer, 2017), and based on current estimates of nutrient composition (NASEM, 2016), while 30% of available corn residues could maintain the entire United States cow herd. Grazing cattle often select diets with greater nutrient density and digestibility in comparison to the overall biomass available; however, most estimates of nutrient density …


Simulation Of Different Rib Shapes In Square Channel, Md Sahedul Islam Jan 2018

Simulation Of Different Rib Shapes In Square Channel, Md Sahedul Islam

Electronic Theses and Dissertations

This study investigates heat transfer and pressure drop for rib-roughened square channel without bleed. To optimize the shape of rib, CFD tools were used to model and simulate channel flow with a variety of rib angles and geometries. To validate simulations and determine the turbulence model, experimental results for two-pass channels with ribs at 45˚ angles with BR = 0 and Re = 25,000 was compared. It was found after conducting simulations with different turbulence models that SST turbulence model gave the best results.


Noise Mapping Of An Educational Environment: A Case Study Of South Dakota State University, Sujan Parajuli Jan 2018

Noise Mapping Of An Educational Environment: A Case Study Of South Dakota State University, Sujan Parajuli

Electronic Theses and Dissertations

Sound is the subjective dimension of what we hear when vibrations reach our ears. Noise, or unwanted sound (mostly human caused), is an objective function of the pressure of those vibrations and is often measured using decibels (dB). Noise is a type of pollution that has both direct and indirect negative impacts on humans, with significant implications for public health plus social, economic, and environmental well-being. Mapping the acoustic landscape (i.e., soundscape) using noise and sound data provides important insights for evaluating, interpreting, understanding, and managing environmental noise. The objectives of this research are threefold; to map the spatial and …