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Articles 1 - 30 of 182
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Engineering Of Hole Transport And Perovskite Absorber Layers To Achieve High Efficiency And Stable Perovskite Solar Cells, Sally Mabrouk
Engineering Of Hole Transport And Perovskite Absorber Layers To Achieve High Efficiency And Stable Perovskite Solar Cells, Sally Mabrouk
Electronic Theses and Dissertations
Perovskite solar cells (PSCs) offer tremendous potential for simple and low-cost solution-based fabrication with high power conversion efficiency, making it a promising renewable energy source alternative to the most common non-renewable energy sources as fossil fuels. The most widely used perovskite for solar cell applications is methylammonium lead triiodide (CH3NH3PbI3). The two structures for PSC are the regular nip device typically fabricated using Spiro- OMeTAD as a hole transport material (HTM), and the inverted pin device fabricated using PEDOT:PSS as a HTM. They have achieved over 20% power conversion efficiency. However, devices are not reproducible or stable and HTMs are …
Application Of Drainage Water Management And Saturated Buffers For Conservation Drainage In South Dakota, Abhinav Sharma
Application Of Drainage Water Management And Saturated Buffers For Conservation Drainage In South Dakota, Abhinav Sharma
Electronic Theses and Dissertations
Edge of field practices such as drainage water management (DWM) and saturated buffers can reduce nutrient transport from croplands to surface waterbodies. DWM uses stackable weir boards in a control structure to manipulate the water table depth throughout the cropping season and reduce the amount of nutrient rich water draining out from the field. Saturated buffers, on the other hand, use a control structure to divert water draining out from the cropland to a vegetative strip via a subsurface tile installed parallel to a waterway. For the saturated buffer systems, a combination of natural denitrification, nitrogen mineralization, and plant uptake …
Cross Calibration And Validation Of Landsat 8 Oli And Sentinel 2a Msi, M. M. Farhad
Cross Calibration And Validation Of Landsat 8 Oli And Sentinel 2a Msi, M. M. Farhad
Electronic Theses and Dissertations
This work describes a proposed radiometric cross calibration between the Landsat 8 Operational Land Imager (OLI) and Sentinel 2A Multispectral Instrument (MSI) sensors. The cross calibration procedure involves i) correction of the MSI data to account for spectral band differences with the OLI; and ii) correction of BRDF effects in the data from both sensors using a new model accounting for the view zenith/azimuth angles in addition to the solar zenith/view angles. Following application of the spectral and BRDF corrections, standard least-squares linear regression is used to determine the cross calibration gain and offset in each band. Uncertainties related to …
Additive Manufacturing With High Density Polyethylene: Mechanical Properties Evaluation, Calvin Wampol
Additive Manufacturing With High Density Polyethylene: Mechanical Properties Evaluation, Calvin Wampol
Electronic Theses and Dissertations
High-density polyethylene is a common recyclable plastic that has a large potential as an additive manufacturing material due its economic and environmental benefits. However, high-density polyethylene has undesirable thermal properties that cause the material to shirk and not adhere to the printing bed during an additive manufacturing processes. Researchers have attempted to combat these thermal properties but have only created novel filaments of high-density polyethylene without being able to create 3D printed specimens for mechanical property testing. This paper presents several methods to create 3D printed specimens with pure high-density polyethylene filament on a fused filament fabrication type 3D printer. …
A Development Of Travel Time Equation For Overland Flow As Affected By Vegetation, Naga Vara Prasad Ganti
A Development Of Travel Time Equation For Overland Flow As Affected By Vegetation, Naga Vara Prasad Ganti
Electronic Theses and Dissertations
In overland flow water research, travel time is a significant parameter used in estimating peak discharge in channels or rivers. Overland flow is assumed to be in turbulent condition to estimate travel time using Manning’s Velocity Equation (MVE). When the flow is in a laminar condition, Grismer’s Laminar Mean Velocity Equation (GLMVE) is applied but fails to consider the roughness parameter. A review of the literature shows numerous equations for overland travel time, but there is no known equation that determines the mean velocity of overland flow under laminar condition with a roughness coefficient or other coefficient related to the …
Improving The Nutritional Characteristics Of Plant Feedstuff By-Products Using Fungal Metabolism, Jacob Zahler
Improving The Nutritional Characteristics Of Plant Feedstuff By-Products Using Fungal Metabolism, Jacob Zahler
Electronic Theses and Dissertations
Plant feedstuff by-products such as soy processing wastewater, guar korma meal, and sorghum hominy are very different, however, all possess a rich nutrient profile. Lessening their value is the presence of lignocellulose, plant anti-nutritional factors, and unfavorable protein profiles. Fungal conversion processes are an attractive approach to improving the value of these by-products by degrading detrimental fractions of each while simultaneously creating nutrient-rich cell mass. The aim of this research was to improve the value of each by-product for potential application in monogastric diets such as fish. Fungal organisms, both yeast and filamentous fungi, were examined for their ability to …
Analysis Of 3d Printed Cylindrical Members, Salvador Caballero
Analysis Of 3d Printed Cylindrical Members, Salvador Caballero
Electronic Theses and Dissertations
Compressive analysis of a structural member is the determination of the axial capacity of the member when it is undergoing a load causing the member to fail in either a buckling or a crushing mode. 3D printed plastic columns have not been characterized and analyzed yet. However, this research characterizes 3D-printed PLA columns and provides parameters for future researchers to investigate. The literature describes the different industries that utilize 3D-printing. In this research, we introduce an innovative approach to investigate the stresses produced in a 3D printed composite member, made of PLA and locally available soil. The compressive testing will …
Distribution, Ecology, Disease Risk, And Genetic Diversity Of Swift Fox (Vulpes Velox) In The Dakotas, Emily Louise Mitchell
Distribution, Ecology, Disease Risk, And Genetic Diversity Of Swift Fox (Vulpes Velox) In The Dakotas, Emily Louise Mitchell
Electronic Theses and Dissertations
The swift fox (Vulpes velox), a native species once abundant throughout the Northern Great Plains (NGP), has declined due to changes in land use, historic predator eradication programs, and predation by larger canid species. Currently, the species is estimated to occupy 44% of its historic range. In the NGP, the status of the swift fox varies by state, ranging from furbearer to endangered species. However, knowledge of the current status of swift foxes in the NGP is lacking due to an absence of systematic population monitoring. Improving the current state of knowledge concerning swift fox populations in the …
Comparison Of Historical Precipitation For Aberdeen, Ipswich, And Eureka, South Dakota, Uday Singh Kshatriya
Comparison Of Historical Precipitation For Aberdeen, Ipswich, And Eureka, South Dakota, Uday Singh Kshatriya
Electronic Theses and Dissertations
The availability of water resources varies from time to time with the climate conditions. Keeping track of climate conditions would eventually benefit for the future predictions. The objective of this research was to compare and contrast the climate especially for Aberdeen, Ipswich and Eureka, South Dakota utilizing the historical monthly precipitation records and to develop the techniques that are reliable to estimate the missing data. For these necessary statistical analyses were performed using the monthly precipitation data from High Plains Regional Climate Center (HPRCC) for the annual and 8-Year periods for Aberdeen, Ipswich and Eureka, South Dakota. 63 water years …
Mechanical Bar Splices For Accelerated Construction Of Bridge Columns, Puskar Kumar Dahal
Mechanical Bar Splices For Accelerated Construction Of Bridge Columns, Puskar Kumar Dahal
Electronic Theses and Dissertations
Mechanical bar splicing is an alternative method of connecting reinforcing bars in concrete structures compared to conventional lap splicing mainly to reduce bar congestion in joints. Recently, mechanical bar splices, which are also referred to as bar couplers, have been used to connect precast members to accelerate construction of concrete bridges and buildings. Current codes prohibit the use of couplers in the plastic hinge regions of bridge columns in high seismic zones. This may be because of a lack of systematic test data on the coupler performance, limited experimental studies on mechanically spliced bridge columns, and an engineering precaution. The …
Western Prairie Stream Fisheries: An Assessment Of Past And Present Fish Assemblage Structure, Biotic Homogenization, And Population Dynamics In Western South Dakota Streams, Stephen Jones
Electronic Theses and Dissertations
Biodiversity is declining globally, especially in in aquatic systems. Prairies are one of the most endangered ecosystem types in North America, and their conversion into agriculture or development as a result of urbanization has had negative effects on prairie stream fish communities. Continued monitoring of fish assemblage change and the population dynamics of prairie stream fishes will provide researchers and managers with valuable information needed to detect and mitigate past and future negative impacts on prairie stream aquatic ecosystems. Sampling was conducted in the mainstem and tributaries of the Grand, Moreau, Cheyenne, Bad, and White rivers within western South Dakota. …
Microbial Communities And Their Impact On Bioenergy Crops In Dynamic Environments, Brandon Monier
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, …
Effects Of Large-Scale Density Reduction On Brown Trout Growth And Movement In Spearfish Creek, South Dakota, Travis Rehm
Effects Of Large-Scale Density Reduction On Brown Trout Growth And Movement In Spearfish Creek, South Dakota, Travis Rehm
Electronic Theses and Dissertations
Density-dependent growth is often observed in stream-dwelling Brown Trout Salmo trutta populations. In Spearfish Creek, South Dakota, biomass of adult Brown Trout (>200 mm) is about three times greater than that reported for similar Black Hills streams while mean length of adult fish is about 30% less. Here, we evaluate large-scale density reduction as a management tool for improving growth rate of stream-dwelling Brown Trout. We compared age-specific growth of wild Brown Trout in stream sections receiving 50% reductions in fish abundance. We also assessed the effect of fish density manipulation on Brown Trout movement patterns and home range …
Service Integration Design Patterns In Microservices, Meng Wang
Service Integration Design Patterns In Microservices, Meng Wang
Electronic Theses and Dissertations
“Microservices” is a new term in software architecture that was defined in 2014 [1]. It is a method to build a software application with a set of small services. Each service has its process to serve a single purpose and communicates with other services through lightweight mechanisms. Because of a great deal of independently distributed services, it is a challenge to integrate the loose services fully. Too many trivial relationships can be messed up easily during deployment. Also, it is hard to modify the relationships if the services are updated as the source codes need to be re-edited and tested. …
The Influence Of Spore-Forming Microorganisms On The Quality And Functionality Of Cultured Dairy Products, Dipakkumar Mehta
The Influence Of Spore-Forming Microorganisms On The Quality And Functionality Of Cultured Dairy Products, Dipakkumar Mehta
Electronic Theses and Dissertations
Spore formers are observed as the common spoilage-causing microflora in milk and dairy products. Their spore-forming ability increases their survivability during heat treatment which leads to their presence in a final product. Spore-forming bacteria have ability to produce many types of spoilage-causing enzymes which are potential to influence quality and functionality of the final product. Many researchers have studied the ability of spore formers to induce a spoilage in various dairy products but as per our knowledge, their spoilage-causing activities are not described in a detail for cultured dairy products. In our first objective, we have studied the ability of …
Acculturation And Belongingness: The Keys To International Student Satisfaction, Semehar Ghebrekidan
Acculturation And Belongingness: The Keys To International Student Satisfaction, Semehar Ghebrekidan
Electronic Theses and Dissertations
The purpose of this thesis is to explore if acculturation in conjunction with belongingness, affected international student satisfaction. With the changes in immigration, the political climate as a whole and college campus demographics, it was important to evaluate what stress factors international students faced while being undergraduate students at a Midwestern University. In addition to using secondary research, primary research was conducted in the form of 4 interviews and 59 electronic surveys. The independent variables that were measured were reorganized into 2 categories: the students’ religious beliefs and the country where the student is from. Themes that came across throughout …
Development Of Texture Weighted Fuzzy C-Means Algorithm For 3d Brain Mri Segmentation, Ji Young Lee
Development Of Texture Weighted Fuzzy C-Means Algorithm For 3d Brain Mri Segmentation, Ji Young Lee
Electronic Theses and Dissertations
The segmentation of human brain Magnetic Resonance Image is an essential component in the computer-aided medical image processing research. Brain is one of the fields that are attracted to Magnetic Resonance Image segmentation because of its importance to human. Many algorithms have been developed over decades for brain Magnetic Resonance Image segmentation for diagnosing diseases, such as tumors, Alzheimer, and Schizophrenia. Fuzzy C-Means algorithm is one of the practical algorithms for brain Magnetic Resonance Image segmentation. However, Intensity Non- Uniformity problem in brain Magnetic Resonance Image is still challenging to existing Fuzzy C-Means algorithm. In this paper, we propose the …
Urea And Rgo Additives To Iodine/Triiodide Electrolyte For Higher Efficiency Dye-Sensitized Solar Cells, Salem Abdulkarim
Urea And Rgo Additives To Iodine/Triiodide Electrolyte For Higher Efficiency Dye-Sensitized Solar Cells, Salem Abdulkarim
Electronic Theses and Dissertations
This research investigated urea and reduced graphene oxide (rGO) as potential additives to a dye-sensitized solar cell (DSSC) iodide/triode electrolyte, in order to enhance overall electrical performance. Additive concentrations of 0, 2, 5, 10, and 15 wt% were investigated. In general, both additives were found to enhance DSSC electrical performance with respect to open circuit voltage Voc and DSSC fill factor FF. The greatest enhancement in these parameters occurred at an additive concentration of 10 wt%. Urea produced a greater degree of enhancement than rGO; the overall efficiency was increased by 10.17±0.01% for urea vs 9.57±0.01% for rGO. The specific …
Tripartite Interactions Of Legumes With Arbuscular Mycorrhizal Fungi And Rhizobial Bacteria: Insight Into Plant Growth, Seed Yield, And Resource Exchange, Arjun Kafle
Electronic Theses and Dissertations
Under natural conditions, legumes, such as alfalfa (Medicago) and soybean (Glycine max) are colonized with arbuscular mycorrhizal (AM) fungi and rhizobial bacteria forming tripartite interactions. Legumes are important crop species due to their high nutritional and economic values. Most of the previous literatures focused on experiments with an individual symbiont: either AM fungi or rhizobial bacteria, but not with both symbionts at the same time, thus our current understanding of resource exchange in tripartite interactions is limited. It has been reported that AM fungi primarily provide phosphate (P), nitrogen (N), and other nutritional and non-nutritional benefits while rhizobial bacteria solely …
Impacts Of Diverse Crop Rotations And Integrated Crop-Livestock System On Soil Quality In South Dakota, Atilla Polat
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 …
Comparison Of Retaining Replacement Heifers In A Straight-Bred Angus System Versus Purchasing Crossbred Replacement Heifers To Be Bred To A Terminal Sire, Grady D. Ruble
Electronic Theses and Dissertations
Two evaluations were conducted to evaluate the biological and economic production efficiency of retaining replacement females in a straight-bred Angus herd (HR) as opposed to purchasing crossbred replacements for a terminal sire production system (PR) where maximum maternal and individual heterosis is achieved. The first study was a comparison of the HR system versus PR system. It was modeled after a 100 hd, straightbred Angus cowherd that raises their own replacement females. The (NASEM, 2016) model was used to determine the required metabolizable energy (ME)/animal for each stage of production. Stages were broken into segments including weaning – d 28, …
Effectiveness Of A Low-Budget Sports Vision Training Program For Improving Batting Statistics Of An Ncaa Division I Baseball Team, Adam J. Melstrom
Effectiveness Of A Low-Budget Sports Vision Training Program For Improving Batting Statistics Of An Ncaa Division I Baseball Team, Adam J. Melstrom
Electronic Theses and Dissertations
Context: Sports vision training (SVT) has been increasing in popularity among many dynamic reactive sports. Dynamic reactive sports require extremely accurate detection and discrimination of visual stimuli in order to execute a precise motor response. Manual interception, locomotion, and depth judgement are found to be the most important visuomotor abilities with interceptive sports such as baseball. Baseball is a highly visually demanding sport, especially offensively. The effectiveness of the batter is dependent on his/her ability to locate, track, and swing at a projectile in ~0.2 seconds. This presents the opportunity to implement an SVT program with a baseball team as …
Development Of Biclustering Techniques For Gene Expression Data Modeling And Mining, Juan Xie
Development Of Biclustering Techniques For Gene Expression Data Modeling And Mining, Juan Xie
Electronic Theses and Dissertations
The next-generation sequencing technologies can generate large-scale biological data with higher resolution, better accuracy, and lower technical variation than the arraybased counterparts. RNA sequencing (RNA-Seq) can generate genome-scale gene expression data in biological samples at a given moment, facilitating a better understanding of cell functions at genetic and cellular levels. The abundance of gene expression datasets provides an opportunity to identify genes with similar expression patterns across multiple conditions, i.e., co-expression gene modules (CEMs). Genomescale identification of CEMs can be modeled and solved by biclustering, a twodimensional data mining technique that allows clustering of rows and columns in a gene …
Diversity Of Free – Living Nitrogen – Fixing Bacteria In Soil Of Sioux Prairie Of South Dakota, Nabilah Ali Alshibli
Diversity Of Free – Living Nitrogen – Fixing Bacteria In Soil Of Sioux Prairie Of South Dakota, Nabilah Ali Alshibli
Electronic Theses and Dissertations
There are only two natural ways by which molecular nitrogen can be available to support life, either by free-living or by symbiotic nitrogen fixing bacteria. The best studied diazotrophs form symbiotic associations with plants, primarily legumes and certain tree species, but little is known about how non-leguminous plants such as grasses obtain nitrogen in their environment. Natural prairies have few legumes, thus have less symbiotic nitrogen fixer interaction. This indicates presence of free-living nitrogen (FLN) fixation activity towards the balance of the N cycle. The objective of this study was to characterize the culturable diversity of free-living diazotrophs in native …
Greenhouse Gas Emissions From Soil Applied Nitrogen Fertilizers, Samuel Thies
Greenhouse Gas Emissions From Soil Applied Nitrogen Fertilizers, Samuel Thies
Electronic Theses and Dissertations
Greenhouse gases (GHG) absorb and emit radiant energy in the thermal range. Their concentrations in the atmosphere are increasing and becoming an ever increasing issue as the Earth’s average temperature continues to rise. Agricultural practices, such as applying nitrogen fertilizer to increase crop yield can be a major source of GHG emissions and methods are needed to decrease these emissions. The measurements of GHG emissions have been difficult, expensive, and erratic. However, advancing technologies have increased the accuracy and confidence in measuring GHG emissions. The objectives of this study were to determine the 1) effects of different nitrogen fertilizer sources, …
Soybean Iron Deficiency Chlorosis: Quantitative Trait Locus Validation And Grain Yield Evaluation, Ahmed Charif
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 …
Development Of Vegetation Mapping With Deep Convolutional Neural Network, Sae-Han Suh
Development Of Vegetation Mapping With Deep Convolutional Neural Network, Sae-Han Suh
Electronic Theses and Dissertations
The Precision Agriculture plays a crucial part in the agricultural industry about improving the decision-making process. It aims to optimally allocate the resources to maintain the sustainable productivity of farmland and reduce the use of chemical compounds. [17] However, the on-site inspection of vegetations often falls to researchers’ trained eye and experience, when it deals with the identification of the non-crop vegetations. Deep Convolution Neural Network (CNN) can be deployed to mitigate the cost of manual classification. Although CNN outperforms the other traditional classifiers, such as Support Vector Machine, it is still in question whether CNN can be deployable in …
Genetic Component Effects Of Two Loci On Seed Dormancy, Awn, Low-Temperature Germination, Plant Height, And Flowering Time In Rice (Oryza Sativa L.), Ugur Korkmaz
Electronic Theses and Dissertations
Seed dormancy (SD) is an adaptive trait of both ecological and agricultural importance. Cereal crops have been selected for reduced SD to promote germination, which also caused the pre-harvest sprouting (PHS) problem in crop production. The previous research identified a set of quantitative trait loci (QTL) for SD, including qSD1- 2 and qSD8, in the conspecific weedy and cultivated rice (Oryza sativa). qSD1-2 carries a dormancy-enhancing allele from the cultivated rice and has a pleiotropic effect on plant height. qSD8 carries a dormancy-enhancing allele from the weedy rice and tightly links to qAL8 for awn length. The …
Gtpase-Activating Protein-Binding Protein 1 Plays An Antiviral Role In Porcine Epidemic Diarrhea Virus (Pedv) Replication, Kabita Pandey
Gtpase-Activating Protein-Binding Protein 1 Plays An Antiviral Role In Porcine Epidemic Diarrhea Virus (Pedv) Replication, Kabita Pandey
Electronic Theses and Dissertations
Porcine Epidemic Diarrhea Virus (PEDV) is a non-segmented virus which uses one-stranded, positive-sense RNA as genetic material. PEDV falls under Coronaviridae family and extensive diarrhea and dehydration in nursing piglets are the major clinical signs. This emerging disease leads to huge economic loss in the pig farming. Very less studies are done towards the role of innate immunity in PEDV infection. The formation of Stress granules (SGs) are seen when cells are introduced to different stressful conditions, which also includes viral infections. SGs are formed when one of the four kinases: doublestranded RNA (dsRNA)-dependent protein kinase (PKR), PKR-like endoplasmic reticulum …
Evaluation Of The Effect Of Tack Coat Type, Application Rate, And Surface Type On Interlayer Shear Strength, Chamika Prashan Dharmarathna
Evaluation Of The Effect Of Tack Coat Type, Application Rate, And Surface Type On Interlayer Shear Strength, Chamika Prashan Dharmarathna
Electronic Theses and Dissertations
Tack coat is an asphaltic material applied between asphalt pavement layers. Since pavement is a multilayered structure, it is highly important to make proper bond between the layers to achieve a monolithic behavior. Hence, inadequate bond due to application of inadequate amount of tack coat may lead to poor structural behavior and premature failure. Also, applying excessive amount of tack coat may lead to layer slippage and binder migration. Therefore, it is highly important to apply an optimum amount of tack coat between layers. Over the past decades several studies have been conducted to determine the optimum tack coat application …