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Improvement Of Transient Stability Of Photovoltaic-Hydro Microgrids Using Virtual Synchronous Machines, Ujjwol Tamraker
Improvement Of Transient Stability Of Photovoltaic-Hydro Microgrids Using Virtual Synchronous Machines, Ujjwol Tamraker
Electronic Theses and Dissertations
Photovoltaic-hydro microgrids can provide reliable clean energy in remote areas that do not have an electric grid. Higher photovoltaic penetration can cause large frequency deviations at a high rate of change of frequency in the system. Virtual synchronous machines have been used to enhance performance of a diesel hybrid minigrid but no studies have been performed to account for dynamics of a hydro system. A method is needed to improve the transient stability of photovoltaic-hydro microgrid systems while allowing high photovoltaic penetration. The objective of this thesis was to study the feasibility of using virtual synchronous machines to improve transient …
The Evaluation Of Chromium Propionate Supplementation On Insulin Responsiveness In Finishing Steers And Energy Status In Newly Weaned Steer Calves, Zachary K. F. Smith
The Evaluation Of Chromium Propionate Supplementation On Insulin Responsiveness In Finishing Steers And Energy Status In Newly Weaned Steer Calves, Zachary K. F. Smith
Electronic Theses and Dissertations
A series of experiments were conducted to evaluate the influence of supplemental dietary chromium (0 or 400 ppb) on insulin responsiveness in finishing steers (Exp 1. and Exp 2.), and energy status in newly weaned steers upon introduction to the feedlot (Exp 3.). To evaluate insulin responsiveness, two models were used with finished steers of different ages: Exp 1. 12 steers; 24 mo old (BW=783 ± 29 kg); and Exp 2. 24 steers; 14 mo old (BW=625 ± 24 kg). A jugular infusion of insulin (0.45 IU bovine insulin/ kg of BW0.75, INS) was pulse dosed 2 h post-prandial. A …
An Economic Analysis Of High-Intensity, Short-Duration Grazing Systems In South Dakota And Nebraska, Bronc Mcmurtry
An Economic Analysis Of High-Intensity, Short-Duration Grazing Systems In South Dakota And Nebraska, Bronc Mcmurtry
Electronic Theses and Dissertations
Four different grazing systems: two rotational, a continuous, and a high-intensity, short-duration (mob) system, replicated twice, were evaluated from an economic perspective. Mob grazing is defined as a system having very high stocking rates for a small amount of time. Livestock are forced to eat or trample the vegetation. Stocking rates and average daily gains (ADG) were collected from the UNL Barta Brothers ranch near Rose, Nebraska. The study started in 2011 and lasted until 2014. Using the performance data and other cost data relevant to South Dakota and Nebraska, budgets were set up for each system and extrapolated to …
Kidquest Childhood Obesity Prevention Program: Analysis Of Its Influence On Health Of Rural South Dakota 5th And 6th Grade Children, Nayef Bumaryoum
Kidquest Childhood Obesity Prevention Program: Analysis Of Its Influence On Health Of Rural South Dakota 5th And 6th Grade Children, Nayef Bumaryoum
Electronic Theses and Dissertations
Obesity is a growing problem throughout the developed world. This project will focus on obesity in rural children by studying those living in an area of South Dakota. Research shows high levels of overweight and obese children in this demographic. The two major objectives of this study are to evaluate the efficacy of the KidQuest (KQ) nutrition and physical activity curriculum in reducing the proportion of children and adolescents who are overweight and obese within participating South Dakota 5th and 6th grade children using baseline/post-intervention data and to determine which KQ teacher type is most effective as evaluated by anthropometric, …
Composing A Literary Adoption Memoir And Self Through Creative Nonfiction Memoir Writing, Jamie K. Nagy
Composing A Literary Adoption Memoir And Self Through Creative Nonfiction Memoir Writing, Jamie K. Nagy
Electronic Theses and Dissertations
Adoption writings span across various forms, such as fiction, non-fiction, essays, poetry, theatre, and scholarly fields of study. While many of these adoption writings speak to the complexities of adoption, the general public still tends to see adoption “such a beautiful thing” to do—as the best plan for the child, a noble act, a selfless decision, and a solution to a long-standing social issue. This thesis explores the “literary adoption memoir”—artful writings about real life happenings; my contribution to this genre addresses the complexities of the closed adoption era, transnational/transracial adoption, and parenting an adoptee as an adult adoptee. For …
Energy Status Of Steers Dictates Effectiveness Of Glycerol Inclusion In High-Roughage And High-Concentrate Feedlot Diets, Erin M. Rife
Energy Status Of Steers Dictates Effectiveness Of Glycerol Inclusion In High-Roughage And High-Concentrate Feedlot Diets, Erin M. Rife
Electronic Theses and Dissertations
The objective of this research was to determine how to use glycerol as an effective source of energy in ruminant diets. Steer calves were used in a 56 d backgrounding study (n=128; Initial BW=340 ± 15 kg) and 105 d finishing study (n=120; Initial BW=420 ± 20 kg). Dietary treatments during backgrounding included 0, 8, 16, and 24% glycerol replacing corn silage in corn silage-based diets. Steers continued on within relative levels of dietary glycerol with finishing diets consisting of 0, 5, 10, and 15% glycerol replacing corn. Cumulative DMI, ADG, and G:F increased linearly (P
U.S. Competition Of Hard Spring Wheat Characteristics, Jacquiline Danso
U.S. Competition Of Hard Spring Wheat Characteristics, Jacquiline Danso
Electronic Theses and Dissertations
There is a changing landscape in the wheat market from the emergence of foreign ownership of local elevators, increased consolidation in the milling sector, technology advancement, and changes in transportation. The changing landscape of the wheat market has been associated with greater degrees of vertical coordination through integration, strategic alliances, and contractual relationships. Particularly greater vertical integration has occurred between the millers, county elevators, and export and country terminal elevators. The greater integration of the milling sector has raised concerns by the Department of Justice Anti-trust division to the competitiveness of the flour market, and has only conditionally approved recent …
Health At Every Size Program Intervention Versus Traditional Weight Loss Intervention: Impact On Diet And Physical Activity, Brooke Noble
Health At Every Size Program Intervention Versus Traditional Weight Loss Intervention: Impact On Diet And Physical Activity, Brooke Noble
Electronic Theses and Dissertations
Backround. A shift from a weight-focus to a health focus -Health At Every Size (HAES)-has been suggested. Yet, little research has compared the impact of this approach to a traditional weight loss program on diet, while physical activity, anthropometric and health indicators have been mixed. Objective. This study evaluated diet, physical activity, anthropometric measurements, blood pressure, blood sugar and cholesterol in participants in these two interventions. It was hypothesized that the HAES group would consume a more nutrient dense diet, more whole foods, higher fiber and lower sodium, while the traditional group would consume lower calories, fat and fiber …
Sisters Of Mercy: The Walking Nun's Siouxland Journey And Experiences In Nursing (1890-1965), Diane L. Smith
Sisters Of Mercy: The Walking Nun's Siouxland Journey And Experiences In Nursing (1890-1965), Diane L. Smith
Electronic Theses and Dissertations
Nursing history is like a kaleidoscope, with prisms of time representing the past, present, and future experiences of nursing. The existence of nursing history is unknown until it is written; similar to the shadowed image of a kaleidoscope mirror is the history of the Sisters of Mercy in Siouxland. Uncovered collections, documents, letters, pictorial archives, and oral histories provide a way to examine the work of the Sisters of Mercy in Siouxland in light of the Careful Nursing Model. On December 12, 1831, Catherine McAuley became the Foundress of the Religious Sisters of Mercy Order in Dublin, Ireland. These Sisters …
Photovoice: Engaging School Communities In Wellness Efforts, Hilary J. Overby
Photovoice: Engaging School Communities In Wellness Efforts, Hilary J. Overby
Electronic Theses and Dissertations
Introduction: Currently there are no interactive tools that allow school communities to assess their school wellness needs and foster interest in wellness efforts. PhotoVoice is a participatory action research methodology commonly used in public health that utilizes photography to document and showcase community strengths and weaknesses in order to promote change. Purpose: The purpose of this study was to gather perceptions of a school community after using PhotoVoice to document school wellness efforts 1. Participants: High school students (n=103) and school community members (i.e., residents of community, school faculty) (n=188) were recruited across three school districts. Methods: High school students …
Virus-Like Particles Generaged By Expressing Proteins Of Porcine Reproductive And Respiratory Syndrome Virus (Prrsv) Using The Recombinant Baculovirus Expression System, April Anne Nelsen
Virus-Like Particles Generaged By Expressing Proteins Of Porcine Reproductive And Respiratory Syndrome Virus (Prrsv) Using The Recombinant Baculovirus Expression System, April Anne Nelsen
Electronic Theses and Dissertations
Porcine reproductive and respiratory syndrome virus (PRRSV) is an enveloped, single stranded, positive sense RNA virus and a member of Arteriviridae. Its genome encodes 10 open reading frames for at least 7 structural proteins and 14 non-structural proteins. Membrane (M), Nuclepcapsid (N), and Glycoprotein-5 (GP5) are the major structural proteins of PRRSV, while Envelope (E), Glycoprotein-2 (GP2), Glycoprotein-3 (GP3), and Glycoprotein-4 (GP4) are the minor structural proteins of PRRSV. GP5 induces neutralizing antibodies and forms heterodimers with M, while N is the most immunogenic protein of PRRSV. Previous studies have shown viral structural proteins are able to form virus-like particles …
Effect Of Timing Of Artificial Insemination And Estrus Expression Using Sexed Semen On Pregnancy Rates In Holstein Dairy Cows, Stephen Crego
Effect Of Timing Of Artificial Insemination And Estrus Expression Using Sexed Semen On Pregnancy Rates In Holstein Dairy Cows, Stephen Crego
Electronic Theses and Dissertations
The use of sexed semen has become important in dairy herds across the U.S. but reported lower conception rates have limited the adaptation in some herds. The objective of this study was to determine if timing of AI and expression of estrus impacted fixedtime AI pregnancy success with sexed semen. Primiparous and multiparous lactating Holstein cows, were synchronized with a Presynch-Ovsynch protocol (PGF d -29; PGF d -19; 100μg GnRH and CIDR insertion d -9; PGF and CIDR removal d -2; GnRH d 0) starting at 35 DIM. The cows were allotted into a 2 x 2 factorial design with …
A Revision Of The Bee Genus Ptiloglossa Smith (Hymenoptera: Colletidae: Diphaglossinae), Rita Isabel Velez-Ruiz
A Revision Of The Bee Genus Ptiloglossa Smith (Hymenoptera: Colletidae: Diphaglossinae), Rita Isabel Velez-Ruiz
Electronic Theses and Dissertations
Among bees of the tribe Caupolicanini, those in the genus Ptiloglossa are the most taxonomically diverse. The genus is inadequately defined, and the known species are poorly understood taxonomically. Many species are known only as males or females, and are relatively uncommon in museum collections. This project explored the diversity of the bee genus Ptiloglossa Smith through a comprehensive morphological study, attempting to provide a basis for a more complete taxonomic revision of its species and proposing an hypothesis of their phylogenetic relationships. Results of this study include one new species from Colombia: P. colombiana n. sp. Ptiloglossa wilmattae Cockerell, …
Go Wish- Pediatrics : Pilot Study Of A Conversation Tool In Pediatric Palliative Care, Meghan Ryan Potthoff
Go Wish- Pediatrics : Pilot Study Of A Conversation Tool In Pediatric Palliative Care, Meghan Ryan Potthoff
Electronic Theses and Dissertations
Problem: Difficult conversations and decisions are an unfortunate reality for parents caring for children facing life threatening conditions. Confusing, inadequate, and inconsistent communication by health care providers makes advance care planning difficult in pediatrics.
Design: A mixed methods design was utilized to evaluate the effectiveness of an advance care planning conversation tool, Go Wish- Pediatrics, on the emotional resources and distress experienced by parents caring for children in palliative care.
Methods: For this pilot study, a mailed invitation to participate was sent to 134 parents of children currently enrolled in palliative care which yielded a total of ten participants. …
Population Ecology Of Rocky Mountain Elk In The Black Hills, South Dakota And Wyoming, Benjamin D. Simpson
Population Ecology Of Rocky Mountain Elk In The Black Hills, South Dakota And Wyoming, Benjamin D. Simpson
Electronic Theses and Dissertations
We conducted a 2-year (2012–2013) study of survival and cause–specific mortality using individually marked adult cow and neonate elk (Cervus elaphus) occupying the southwestern region of the Black Hills. We used known-fate analysis in Program MARK for survival analysis of adult cows and calves. We estimated survival and cause-specific mortality of 49 adult female elk over the 2 years of the study. Annual adult cow survival was 0.85 (95% CI = 0.72–0.87). We documented 12 mortalities with harvest (58.3%) and predation (16.6%) accounting for the majority of known mortalities. We captured and fit 71 neonates < 10 days of age with expandable Very High Frequency (VHF) radiocollars during summer 2012 (n = 37) and 2013 (n = 34). Annual (12 month) survival of elk calves was 0.75 (95% CI = 0.61–0.84) while summer (20 weeks; 15 May–25 September) survival was 0.79 (95% CI = 0.68–0.88). Predation accounted for 87.5% of mortalities; remaining mortalities were from starvation (6.3%) and unknown (6. 3%) causes. We used Global Positioning System (GPS) collars to collect 167,707 locations to determine home range, movement ecology, and macroscale resource selection of 48 adult cow elk. We documented elk using a variety of migration strategies (obligate migrator, resident, conditional migrator, disperser); the majority of the population (58%) was migratory. Spring migration distance travelled ranged from 2.45 km – 74.44 km (n = 42); fall migration distances ranged from 6.41km – 153.95 km (n = 46). We used 99% Brownian Bridge Movement Models to create seasonal and overall home ranges of adult cow elk. Mean overall home range size for conditional migrators was 249.28 km2 (SE = 28.60, n = 7, range = 233.75), for obligate migrant elk it was 227.18 km2 (SE = 13.94, n = 29, range = 346.83), and for resident elk it was 175.65 km2 (SE = 22.75, n = 11, range = 216.04). We used discrete choice models to determine resource selection at the macro-habitat scale of collared adult elk using ArcMap 10.1 data. Adult cow elk selected for open grassland/herbaceous areas and early successional forest areas close to forested edges at higher elevations. Our study showed that elk populations have the ability to thrive within an ecosystem with healthy predator populations.
Band To Band Calibration And Relative Gain Analysis Of Satellite Sensors Using Deep Convective Clouds, Suman Bhatta
Band To Band Calibration And Relative Gain Analysis Of Satellite Sensors Using Deep Convective Clouds, Suman Bhatta
Electronic Theses and Dissertations
Two calibration techniques were developed in this research. First, a calibration technique, in which calibration was transferred to cirrus band and coastal aerosol band from well calibrated reflective bands of Landsat 8 using SCIAMACHY Deep Convective Cloud (DCC) spectra. Second, a novel method to derive relative gains using DCCs and improve the image quality of cirrus band scenes was developed. DCCs are very cold, bright clouds located in the tropopause layer. At small sun elevation and sensor viewing angles, they act as near Lambertian solar reflectors. They have very high signal to noise ratio and can easily be detected using …
Drought Resistance And Resilience Of Non-Native Vs. Native Grasses In The Northern Tallgrass Prairie, Wyatt Kirwan
Drought Resistance And Resilience Of Non-Native Vs. Native Grasses In The Northern Tallgrass Prairie, Wyatt Kirwan
Electronic Theses and Dissertations
Drought can have major impacts on rangeland productivity and remains highly unpredictable. Like many other rangelands in the US, the Tallgrass Prairie of eastern South Dakota contains native prairie where the plant composition includes mostly native species as well as pasture that has been converted to or invaded by cool-season introduced species. So how are these two plant communities impacted by drought? The specific objective of this study was to compare drought resistance and drought resilience of native prairie to introduced cool-season pasture (Smooth brome - Bromus inermis and Kentucky bluegrass - Poa pratensis). Our Hypothesis was that native prairie …
Studies Related To Microbially Induced Corrosion Of Stainless Steel 304 And 316, Somil Gupta
Studies Related To Microbially Induced Corrosion Of Stainless Steel 304 And 316, Somil Gupta
Electronic Theses and Dissertations
Pitting corrosion of stainless steel (SS) is observed in many different industries including the dairy industry. It is of concern, because it weakens the steel, and can cause cracking. Any replacement or repair of SS equipment is very costly and also causes delays in product manufacture. Microbial Induced Corrosion (MIC) is a possible accelerator of natural corrosion seen in galvanized steel pipes. Studies have shown a correlation between surface roughness and the ability of bacteria to colonize and form biofilms. Dairy industry utilizes higher food grade SS 304 and 316. However, even these relatively corrosion resistant stainless steel grades may …
A Comparison Between South Dakota And North American Standard Sampling Gears In Lakes And Reservoirs, Bradley J. Smith
A Comparison Between South Dakota And North American Standard Sampling Gears In Lakes And Reservoirs, Bradley J. Smith
Electronic Theses and Dissertations
A statewide gear comparison was performed in South Dakota during 2013 and 2014 between current South Dakota Department of Game, Fish and Parks (SDGFP) sampling gears (i.e., gill nets and modified fyke nets) and their equivalents described in Standard Methods for Sampling North American Freshwater Fishes (Standard). Adopting Standard gears would provide uniform gear specifications for annual sampling statewide, facilitate data sharing within South Dakota and beyond, and allow for large-scale spatial and temporal analyses relevant to researchers and managers. Sampling was divided between non-Missouri River (non-MR) and Missouri River (MR) systems because gill nets used by SDGFP to sample …
Cliteracy And Justice For All : A Critical Rhetorical Analysis Of Sophia Wallace’S Cliteracy Campaign, Vanessa Condon
Cliteracy And Justice For All : A Critical Rhetorical Analysis Of Sophia Wallace’S Cliteracy Campaign, Vanessa Condon
Electronic Theses and Dissertations
Female sexuality is constantly restricted in public discourse in the United States. To combat this, Sophia Wallace created the Cliteracy campaign: a project that sought to challenge the stigmatization of female genitals. Wallace’s attempt to create a new language regarding female sex and sexuality revealed critical implications for how we discuss sex in American culture. For an in depth analysis, I utilized feminist, materialist, and social movement rhetorical lenses. This study revealed that while text is viewed as an objective mode of communication, however, it is ingrained with hierarchical societal constraints. Moreover, Wallace’s rhetoric suggested that a god term is …
Investigation And Optimization Of Bio-Oil From Fast Pyrolysis Of Brassica Carinata Meal, William Daniel Sonnek
Investigation And Optimization Of Bio-Oil From Fast Pyrolysis Of Brassica Carinata Meal, William Daniel Sonnek
Electronic Theses and Dissertations
Fast pyrolysis is one method of creating bio-oil from biomass such as lignin, prairie cordgrass, and other organic commercial and industrial byproducts. In this thesis, fast pyrolysis of Brassica carinata meal, or simply carinata meal, was performed in an auger-type reactor. A parametric study was conducted to investigate the differences in yield, calorific, rheological, and stability property differences between the bio-oils created at five reactor temperatures and two condenser temperatures. The viscosity, water content, energy content, and acidity of the oils were measured using a rheometer, Karl- Fisher titration, a bomb calorimeter, and a titrator, respectively. The aging of the …
Spatial Variability Of Saline And Sodic Soils In The Black Glaciated Region Of The Northern Great Plains, Usa, Rachel K. Owen
Spatial Variability Of Saline And Sodic Soils In The Black Glaciated Region Of The Northern Great Plains, Usa, Rachel K. Owen
Electronic Theses and Dissertations
Recent (1990-2014) increases in salt affected soils in the Northern Great Plains states of South Dakota (SD) and North Dakota (ND), MLRA 55B and 55C, have prompted more intensive research on groundwater derived saline and sodic soil characteristics in semi-humid and humid climates. Past research has focused on salinity and sodicity in irrigated agricultural systems in semi-arid and arid climates. Due to the disconnect between prior research and current problems in this region, it is necessary to assess widely used laboratory methods, and determine if short cuts can be used for rapid evaluation. The objectives of this research were: 1) …
Classifying And Mapping Native Grasslands Of South Dakota's Northern Prairie Coteau And Characterizing Habitat For Dakota Skipper Conservation, Diane M. Narem
Classifying And Mapping Native Grasslands Of South Dakota's Northern Prairie Coteau And Characterizing Habitat For Dakota Skipper Conservation, Diane M. Narem
Electronic Theses and Dissertations
Native tallgrass prairie is becoming increasingly rare due to conversion and degradation, putting pressure on endemic prairie species such as the federally threatened Dakota skipper butterfly (Hesperia dacotae). To develop a conservation plan for the butterfly in South Dakota, accurate vegetation classification, mapping, and characterization are critical. The objectives of this study were to 1) rank prairie condition, 2) classify and map upland prairie, 3) characterize and compare vegetation at Dakota skipper inhabited and formerly inhabited sites, and 4) identify potential Dakota skipper habitat within a 225 mi2 (58,275 hectares) study area of the SD Prairie Coteau. Condition metrics were …
Increasing The Nutritional Value Of Canola Meal Via Fungal Bioprocessing, Jason R. Croat
Increasing The Nutritional Value Of Canola Meal Via Fungal Bioprocessing, Jason R. Croat
Electronic Theses and Dissertations
The main limitation of meals from canola and other Brassica spp. is the presence of glucosinolates (GLS), which are anti-nutritional and can even be toxic at high ingestion levels. Furthermore, large amounts of GLS can reduce palatability for livestock and thus reduce intake and growth rates. For this reason canola was bred to contain lower levels of GLS (<30 >μmol/g) and erucic acid (< 2%). However, feed inclusion rates are still limited to ~30%, and this reduces the value of canola meal. The goal of this thesis was to optimize a pretreatment and fungal conversion process to enhance the nutritional value of canola meal. Various combinations of physical/chemical pretreatments, fungal cultures, and incubation methods were investigated to metabolize GLS into cell mass, CO2, or other non-toxic components. These treatments also served to hydrolyze canola meal fiber into carbohydrates which were then metabolized by the fungi into single cell protein. Solid-state incubation conditions were initially tested, since filamentous fungi are well adapted to grow at lower moisture levels, and this would potentially reduce contamination issues with bacteria. Flask trials were performed using 50% moisture, hexane extracted (HE) or cold pressed (CP) canola meal, with incubation for 168 h at 30ºC. On HE canola meal Trichoderma reesei (NRRL-3653) achieved the greatest increase in protein content (23%), while having the lowest residual levels of sugar (8% w/w) and GLS (0.4 μM/g). On CP canola meal T. reesei (NRRL-3653), Aureobasidium pullulans (NRRL-58522), and …
Impacts Of Urban Areas On Vegetation Development Along Rural-Urban Gradients In The Upper Midwest: 2003-2012, Cole Krehbiel
Impacts Of Urban Areas On Vegetation Development Along Rural-Urban Gradients In The Upper Midwest: 2003-2012, Cole Krehbiel
Electronic Theses and Dissertations
Between one-third and one-half of Earth’s land surface has been directly altered by humans, with the remainder comprised of “human-dominated ecosystems” (Vitousek et al. 2008). Earth’s population has surpassed seven billion, projected to increase by 2.5 billion by 2050 in urban areas alone (United Nations 2014). The rapid urbanization of our planet drives global environmental changes in hydrosystems, biodiversity, biogeochemical cycles, land use and land cover, and climate (Grimm et al. 2008). Urban areas alter local atmospheric conditions by modifying surface albedo and consequently evapotranspiration, releasing energy through anthropogenic heat sources, and increasing atmospheric aerosols, leading to increased temperatures in …
A Process-Based Nutrient Model For The Bedded Manure Pack Of Confined Beef Systems, Ferouz Y. Ayadi
A Process-Based Nutrient Model For The Bedded Manure Pack Of Confined Beef Systems, Ferouz Y. Ayadi
Electronic Theses and Dissertations
Manure management is of growing concern for beef cattle producers and the general public. The overall objective of this research was to develop a process-based model that predicts concentration and gaseous emission from the bedded manure pack of a confined beef cattle system, with respect to different bedding material, manure storage time, and ambient temperature. The model incorporated the data collected in three experiments designed to understand transformations and processes occurring in the bedded pack. The first study evaluated the source of volatilized ammonia nitrogen from beef cattle manure. Isotope ratio mass spectrometry was used to determine the origin of …
Work-Family-School Conflict Among Non-Traditional Students, Amy Trautner
Work-Family-School Conflict Among Non-Traditional Students, Amy Trautner
Electronic Theses and Dissertations
Research is scarce on the subject of work-family-school (WFS) conflict for nontraditional students. This study assessed the relationship between non-traditional students’ age, gender, and perceived level of support and their level of WFS conflict. It was predicted that older students would report higher levels of conflict than younger students, women would report higher levels of conflict than men, and students who received more support would have lower levels of conflict than those with less support. Three Midwestern universities were surveyed (N = 287). Both quantitative and qualitative data were gathered. Although the three hypotheses were not supported, the qualitative responses …
Effect Of Ph And Temperature On Halogenated Dbps, Sm Shamimur Rahman
Effect Of Ph And Temperature On Halogenated Dbps, Sm Shamimur Rahman
Electronic Theses and Dissertations
Water scarcity is one of the most challenging issues in the world in the 21st century. It is estimated that there are more than one billion of people without adequate access to freshwater and facing water shortages and water deficits. People are forced to drink polluted water despite the risk of consuming pathogenic microorganisms in the water that transmit waterborne diseases such as bacterial infections, protozoal infections and viral infections. The water disinfection process is one of the most important environmental technological advances in the 20th century which inactivates microbial contaminants in drinking water. Disinfection byproducts (DBPs) are a group …
Volunteer Glyphosate-Resistant Corn And Soybean Competition And Control, Jill Alms
Volunteer Glyphosate-Resistant Corn And Soybean Competition And Control, Jill Alms
Electronic Theses and Dissertations
The continuous use of glyphosate-resistant crops has resulted in volunteer crops with the same herbicide resistance as the cash crop and an increasing weed problem. Volunteer corn reduces soybean yields however; little research has examined corn yield loss due to volunteer corn or volunteer soybean competition. These studies investigated yield loss and control of volunteer soybean in corn, and volunteer corn in soybean and corn. Using several densities of competitive plants, the yield loss was fit to a hyperbolic equation that indicated incremental yield loss (I value) to be 29.9 for volunteer corn in soybeans, 5.6 for volunteer corn in …
Modeling The Impact Of Future Climate On Drainage Infrastructures, Tyler J. Baumbach
Modeling The Impact Of Future Climate On Drainage Infrastructures, Tyler J. Baumbach
Electronic Theses and Dissertations
Research has shown a potential 20% increase in future heavy and extreme precipitation events over the Midwestern States. Drainage infrastructures designed using current design conditions may not be able to convey projected runoffs resulting in flooding and damage to infrastructure. The objective of this paper is to determine the effects of future climate variability on culvert selections in a southwest South Dakota watershed. The scope of the study was defined through a comprehensive literature review. Future climate events were based on a 20% increase in current annual precipitation over the Upper White River Subbasin Watershed. A portion of the White …