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Articles 2221 - 2243 of 2243
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Long-Term Impacts Of Annual Cattle Manure And Fertilizer On Soil Quality Under Corn-Soybean Rotation In Eastern South Dakota, Ekrem Ozlu
Electronic Theses and Dissertations
Dairy and beef manure have been used to enhance soil quality; however, their impacts under long-term application in corn-soybean rotation need to be evaluated. Nutrient based recommended rates of manure applications on soils are important and also need to be monitored. This study, therefore, was conducted at two long-term sites to assess the impacts of manure and inorganic fertilizer application rates on some of the soil quality indicators and greenhouse gas emissions (GHGs) in a corn (Zea mays L.) - soybean (Glycine max L.) rotation system located at Beresford and Brookings in Eastern South Dakota. Study treatments included: …
Precast Full-Depth Deck Panels Supported On Inverted Bulb-Tee Bridge Girders, Michael James Mingo
Precast Full-Depth Deck Panels Supported On Inverted Bulb-Tee Bridge Girders, Michael James Mingo
Electronic Theses and Dissertations
The South Dakota Department of Transportation (SDDOT) currently uses precast double-tee bridge deck systems for many of its county bridges because they are economical and fast in construction. Current bridges are designed for a service life of 75 years. However, many double-tee girder bridges are deteriorating and some need total replacement after 40 years in service. Furthermore, the double-tee bridge system only has one supplier in South Dakota. Alternative durable precast or prefabricated bridge systems are needed to provide more options to local governments when designing a new bridge. Different alternatives will also give local governments more flexibility to select …
Predicting Field Water Balance, Crop Yield, And The Economics Of Drainage Under Various Cropping Systems Using Drainmod, Shailendra Singh
Predicting Field Water Balance, Crop Yield, And The Economics Of Drainage Under Various Cropping Systems Using Drainmod, Shailendra Singh
Electronic Theses and Dissertations
Subsurface drainage received considerable attention during the recent few years in South Dakota. While subsurface drainage is a widely accepted water management practice for increasing crop yield, research implicated tile drainage in surface and groundwater quality problems. Conservation practices such as crop rotation and controlled drainage may decrease tile flows and improve water quality. A two-year (2014-2015) subsurface drainage study was conducted at South Dakota State University Southeast Research Farm (SERF) near Beresford, South Dakota to evaluate the effectiveness of selected conservation practices in reducing drainage volume and nitrate losses. Six experimental plots, under corn-soybean rotation, divided into drained and …
Synthetic Biology For Autotrophic And Heterotrophic Production Of Ethanol, Nathanael Braselton
Synthetic Biology For Autotrophic And Heterotrophic Production Of Ethanol, Nathanael Braselton
Electronic Theses and Dissertations
Growing energy demand and rising levels of greenhouse gases has put massive strain on the global environment. Alternatives to fossil fuels are being developed in an attempt to curb climate change. Biotechnology has made large strides in order to create a completely renewable energy source by genetically modifying microbes to produce biofuels and other “green” high value compounds. In this thesis project, (1) E. coli ATCC9637 (E. coli W) was genetically modified to produce bioethanol from beet juice which contains mainly sucrose. The ethanol productivity by engineered E. coli W was 18.8 mg/L/H/OD600.
(2) Cyanobacterium Anabaena sp. PCC7120 …
Mechanistic Studies Of The Structure-Photostability Relationship Of Organic Conjugated Polymers, Logan Paul Sanow
Mechanistic Studies Of The Structure-Photostability Relationship Of Organic Conjugated Polymers, Logan Paul Sanow
Electronic Theses and Dissertations
Organic Conjugated polymers (CPs) are a subject of intense research for their application in organic photovoltaics (OPVs), organic light emitting diodes (OLEDs), solid-state dye lasing, biological imaging and sensing, chemical sensing and remote sensing. CPs are key materials in the quest for more sustainable forms of renewable energy, making electronics more versatile and light weight, and increasing the functionality of everyday materials. For these applications and others that use CPs as the photoactive material, one of their main drawbacks is their susceptibility to photodegradation. Photodegradation occurs when the material is exposed to light leading to irreversible changes in the materials, …
Assessing Freshwater Mussels (Bivalvia: Unionidae) In South Dakota And Identifying Drivers Of Assemblage Variation, Kaylee L. Faltys
Assessing Freshwater Mussels (Bivalvia: Unionidae) In South Dakota And Identifying Drivers Of Assemblage Variation, Kaylee L. Faltys
Electronic Theses and Dissertations
Native freshwater mussels (Family: Unionidae) are among the most threatened groups of freshwater fauna on Earth. Approximately 35 species have gone extinct since the 1900s and 72% of remaining species are considered endangered, threatened, or species of special concern. Unionid research can begin by establishing species presence and distributions via surveys. Objectives for this study were to 1) implement the first comprehensive unionid survey for South Dakota to assess distribution, composition, and decline, 2) estimate assemblage density and determine local versus broad scale habitat drivers of assemblage variation, and 3) determine areas of unionid conservation priority in South Dakota. Mussels …
Developing Management Guidelines That Balance Cattle And Timber Production With Ecological Interests In The Black Hills Of South Dakota, Kurt M. Chowanski
Developing Management Guidelines That Balance Cattle And Timber Production With Ecological Interests In The Black Hills Of South Dakota, Kurt M. Chowanski
Electronic Theses and Dissertations
Forested lands contribute to the United States (US) economy by providing livestock and timber production. Livestock grazing of forested lands has been widespread throughout the western US since the settlement era, and currently occurs on 51.4 million hectares (ha) representing 16% of all US grazing land and 22% of all US forested land (Nickerson et al. 2011). While livestock grazing and timber harvest are occurring on a substantial amount of forested land, relationships between management practices, tree stocking, timber production, forage production, livestock grazing, wildlife, aesthetics, and ecological integrity are not well documented. Whether considering timber or cattle, finding a …
Reuse Of Aqueous Waste Streams For Transportation-Related Applications, Gregory L. Hansen
Reuse Of Aqueous Waste Streams For Transportation-Related Applications, Gregory L. Hansen
Electronic Theses and Dissertations
Aqueous waste streams produced from commercial, industrial, and municipal processes may be potentially reused for transportation applications. The objectives of this project were to identify potential transportation-related applications for aqueous waste streams available in South Dakota, develop guidance for the beneficial reuse of aqueous waste streams, and evaluate the reuse of MIEX® brine generated by the Watertown Municipal Water Treatment Plant (WMWTP). This study identified many aqueous wastes from municipal water and wastewater treatment facilities, industrial and agricultural processes in South Dakota that can be potentially used for ice and dust control. Beneficial reuse of these waste streams requires a …
Demonstrating Short-Term Impacts Of Grazing Cover Crops On Soil Health In South Dakota, Colin Tobin
Demonstrating Short-Term Impacts Of Grazing Cover Crops On Soil Health In South Dakota, Colin Tobin
Electronic Theses and Dissertations
Grasslands have been rapidly converted to croplands over the last decade in the northern Great Plains. This conversion can reduce soil health and increase the region’s ability to pollute the Missouri and Mississippi rivers. Therefore, the need for integrated crop livestock (ICL) practices that can protect the region’s native prairies are strongly encouraged. Introducing livestock into arable cropping systems can improve nutrient cycling, soil health, and provide economic benefits. However, the detailed information about the impacts of ICL system on soil health is still lacking in the Northern Great Plains region. Therefore, the present study was conducted under a corn …
Impacts Of Wetland Characteristics On Duck Use In The Prairie Pothole Region (Ppr) 1987-2013, Fred Thomas Oslund
Impacts Of Wetland Characteristics On Duck Use In The Prairie Pothole Region (Ppr) 1987-2013, Fred Thomas Oslund
Electronic Theses and Dissertations
Since 1987 the Waterfowl Breeding Populations and Production Estimates, also called the Four Square Mile Survey, has been conducted annually in the U.S. Prairie Pothole Region. The survey was designed to assess the influence of the Small Wetlands Acquisition Program on contributions to continental waterfowl populations (Cowardin et al. 1995). Each year cooperators visit sample wetlands during two survey periods, collecting data on observed waterfowl and pond conditions. Along with ground counts, aerial photography of sample areas is collected annually, capturing habitat conditions. My objective was to assess the influence of local and landscape factors on duck pair densities. Local …
Body Satisfaction And Ability To Identify Weight Status Of Preschool-Aged Children By Their Caregivers, Andrea Brown
Body Satisfaction And Ability To Identify Weight Status Of Preschool-Aged Children By Their Caregivers, Andrea Brown
Electronic Theses and Dissertations
Rates of childhood obesity have been rising consistently across the nation and internationally. As a result, interventionists have been working to develop ways to combat this and have focused on interventions involving caregivers. Previous research indicates caregivers experience challenges in identifying obesity among their own children, which leads to barriers in addressing and reducing rates of obesity as caregivers remain unaware of any problems. The current study explored caregivers’ ability to correctly assign their child to the appropriate weight category and whether their ability was impacted by caregivers’ own weight status. Further, it also explored caregivers’ level of body satisfaction …
Effects Of Visitors And Enrichments On Behavior Of Captive Red Wolves’ (Canis Rufus) At The Great Plains Zoo, Sioux Falls, South Dakota, Kylee S. Shotkoski
Effects Of Visitors And Enrichments On Behavior Of Captive Red Wolves’ (Canis Rufus) At The Great Plains Zoo, Sioux Falls, South Dakota, Kylee S. Shotkoski
Electronic Theses and Dissertations
Red wolves (Canis rufus) are the first animals to maintain a wild population from captive, released individuals. A captive breeding program for red wolves was started before complete extirpation, and 4 breeding pairs were released in Alligator River National Wildlife Refuge (North Carolina) in 1987 and a small wild population still exists there. Currently, there are several captive breeding facilities for red wolves within the Species Survival Plan (SSP) program. The Great Plains Zoo in Sioux Falls, South Dakota participates in the SSP program. My study was initiated to create a natural history background and evaluate interaction between …
Within And Without: Psychoanalysis, Trauma Theory, And The Healing Narrative, Carrie Crisman Oorlog
Within And Without: Psychoanalysis, Trauma Theory, And The Healing Narrative, Carrie Crisman Oorlog
Electronic Theses and Dissertations
In this collection, I explore the process of writing to heal from trauma. In exploring the rhetorical landscape of trauma writing, I offer a new framework for understanding how those who experience a traumatic event may use the process of writing creatively to engage in a process of healing. I argue that through the creation of art, individuals may take ownership of their experiences and memories, thus exerting the agency over the experience that was lost as the result of trauma. I also demonstrate and reflect upon my own journey in creating the healing narrative as a process of healing …
Breast Cancer Classification Of Mammographic Masses Using Circularity Max Metric, A New Method, Tae Keun Heo
Breast Cancer Classification Of Mammographic Masses Using Circularity Max Metric, A New Method, Tae Keun Heo
Electronic Theses and Dissertations
Breast cancer classification can be divided into two categories. The first category is a benign tumor, and the other is a malignant tumor. The main purpose of breast cancer classification is to classify abnormalities into benign or malignant classes and thus help physicians with further analysis by minimizing potential errors that can be made by fatigued or inexperienced physicians. This paper proposes a new shape metric based on the area ratio of a circle to classify mammographic images into benign and malignant class. Support Vector Machine is used as a machine learning tool for training and classification purposes. The improved …
Role Of Microglial Α7 Nicotinic Acetylcholine Receptor Positive Allosteric Modulator In Neuroinflammatory Pain Models In Mice, Muzaffar Abbas
Role Of Microglial Α7 Nicotinic Acetylcholine Receptor Positive Allosteric Modulator In Neuroinflammatory Pain Models In Mice, Muzaffar Abbas
Electronic Theses and Dissertations
Neuroinflammatory pain affects about 1.5% of the United States population. Around 20-40% patients having neurological disorders are affected with neuroinflammatory pain. As a part of the limbic system, hippocampus is known to play a critical role in pain perception and processing, and is densely populated with microglial cells and α7 nicotinic acetylcholine receptors (nAChRs). Given the role of microglial α7 nAChRs in neuroinflammation, the α7 nAChRs have emerged as potential target for neuroinflammatory pain treatment. We hypothesized that microglial α7 nAChRs positive allosteric modulation in the hippocampus will decrease neuroinflammatory pain at behavioral, cellular, biochemical, and molecular level. The primary …
Virtual Inertia Emulation To Improve Dynamic Frequency Stability Of Low Inertia Microgrids, Dipesh Shrestha
Virtual Inertia Emulation To Improve Dynamic Frequency Stability Of Low Inertia Microgrids, Dipesh Shrestha
Electronic Theses and Dissertations
Due to low inertia and the intermittent nature of photovoltaic systems, dynamic frequency stability issues arise in microgrids with large photovoltaic systems. This limits the maximum amount of photovoltaic systems that can be penetrated in the microgrid. In order to increase the penetration of photovoltaic systems, the dynamic frequency controller, that is faster than the primary frequency controller (governor control) needs to be added in the microgrid system. For dynamic frequency control, inertial response can be provided from the energy storage system (such as battery, ultra-capacitor, photovoltaic system, etc.), which is termed as virtual inertia. A virtual inertia can be …
Root Rot Pathogens Of Wheat In South Dakota And Their Affect On Seed Germination And Seedling Blight In Spring Wheat Cultivars, Navjot Kaur
Electronic Theses and Dissertations
Crown rot and common root rot are the important root diseases in wheat (Triticum aestivum L.) and other cereals causing significant germination and yield losses in the Northern Great Plains and other parts of the world. Bipolaris sorokiniana (Bs) and Fusarium graminearum (Fg) cause common root rot and crown rot respectively, are the important wheat root pathogens that can affect seed germination, seedling establishment and impact crop productivity. A survey was conducted in the year 2014 and 2015 to study the distribution and the prevalence of root rot pathogens in South Dakota. Out of 31 and eight roots samples …
Game Theoretical Approach For Joint Relay Selection And Resource Allocation In Mobile Device Networks, Runan Yao
Electronic Theses and Dissertations
With the improvement of hardware, more and more multimedia applications are allowed to run in the mobile device. However, due to the limited radio bandwidth, wireless network performance becomes a critical issue. Common mobile solutions are based on the centralized structure, which require an access point to handle all the communication requirement in the work area. The transmission performance of centralized framework relies on the density of access points. But increasing the number of access points will cost lot of money and the interference between access point will reduce the transmission quality. Thanks to the wireless sensor network implementations, the …
Data Center Load Forecast Using Dependent Mixture Model, Md Riaz Ahmed Khan
Data Center Load Forecast Using Dependent Mixture Model, Md Riaz Ahmed Khan
Electronic Theses and Dissertations
The dependency on cloud computing is increasing day by day. With the boom of data centers, the cost is also increasing, which forces industries to come up with techniques and methodologies to reduce the data center energy use. Load forecasting plays a vital role in both efficient scheduling and operating a data center as a virtual power plant. In this thesis work a stochastic method, based on dependent mixtures is developed to model the data center load and is used for day-ahead forecast. The method is validated using three data sets from National Renewable Energy Laboratory (NREL) and one other …
Application Of New Materials And Innovative Detailing For Reinforced Concrete Structures, Ishtiaque Ahmed Tuhin
Application Of New Materials And Innovative Detailing For Reinforced Concrete Structures, Ishtiaque Ahmed Tuhin
Electronic Theses and Dissertations
Confinement enhances mechanical properties of concrete sections specifically its strain capacity thus results is higher displacement capacity for reinforced concrete members. Even though the behavior of concrete confined with external jackets has been extensively investigated in previous studies, the use of rubber-based material as an external confinement is new, and was investigated for the first time in the present study. Thirty concrete cylinders were tested under uniaxial compression to investigate mechanical properties of rubber confined concrete. It was found that rubber does not increase the strength of confined concrete. However, the strain capacity of rubber confined concrete was more than …
Integrated Tandem Dye Sensitized Solar Cell (Dssc)-Lithium Ion Battery, Geetha Varnekar
Integrated Tandem Dye Sensitized Solar Cell (Dssc)-Lithium Ion Battery, Geetha Varnekar
Electronic Theses and Dissertations
Efficient renewable energy harvesting and storage are needed for present challenges related to clean environment and increasing energy demand. Different types of energy harvesting technologies such as solar, thermal and wind require excess energy to be stored in batteries, which further adds to the complication and increase in cost to the overall renewable energy system. Integrating the generation and storage of solar energy in a single device would be a more cost effective way towards meeting the increasing energy demand due to its simplicity in design and less space consumptions. Herein, a sustainable photovoltaic cell integrated with an energy storage …
Bidirectional Distribution Reflection Function Of Algodones Dunes, Mahesh Shrestha
Bidirectional Distribution Reflection Function Of Algodones Dunes, Mahesh Shrestha
Electronic Theses and Dissertations
The primary objective of this project was to develop the Algodones Dunes as a pseudo-invariant calibration site (PICS) suitable for absolute calibration of satellite sensors based on a surface reflectance model. Two approaches were taken during this research: a field campaign and laboratory measurements. The first approach, the field campaign, was accomplished with a trip to the Algodones Dunes from the 8th to the 13th of March, 2015. During the field campaign, several test points from spatially different regions of the Algodones Dunes were studied. Reflectance of the sand at each test point was observed from different view angles. The …
The Human Dimensions Of Pollinator Conservation : Perception, Practice, And Policy In The Lowbush Blueberry Industry, Kourtney K. Collum
The Human Dimensions Of Pollinator Conservation : Perception, Practice, And Policy In The Lowbush Blueberry Industry, Kourtney K. Collum
Electronic Theses and Dissertations
This dissertation presents comparative research of diverse agricultural actors involved in lowbush blueberry productions in Maine, USA and Prince Edward Island (PEI), Canada, in order to explore the factors that influence on-farm pollinator conservation. The research is presented through three distinct projects. In the first project, my collaborators and I ask: how do growers perceive and understand pollination in agricultural systems, and how do growers’ perceptions influence their willingness and ability to enact on-farm bee conservation? Drawing on semi-structured interviews with conventional growers, we present growers’ cultural models of pollination management and pollinator conservation. Our analysis reveals that the messages …