46033 research outputs found
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Glenn Campbell
No full textCountry singer, Glen Travis Campbell, performed at the Chester Fritz Auditorium on April 15, 1991.https://commons.und.edu/performing-arts-photos/1045/thumbnail.jp
The Effects of Animals on Our Mental Health
Get PDFI analyzed different published journals on how animals affect our mental health. I put it into less scientific terms and made it more fun with adding in personal experiences
Eminent Domain and the Displacement of ND Families: The Impact of the Garrison Dam
Get PDFThis zine looks at the consequences of the United States government exercising the power of eminent domain, as seen in the 1953 United States of America vs. Certain Lands case.https://commons.und.edu/history-hawks/1008/thumbnail.jp
Education During Great Depression
Get PDFA story of a family struggling and trying to maintain an education in North Dakota in the 1930s.https://commons.und.edu/history-hawks/1000/thumbnail.jp
Shark Skin Riblet Microstructures: An Oceanic Solution to Reduce Shear Wall Stress and Skin Friction
Get PDFMinimizing energy consumption and its associated costs is a key priority in engineering. Potential solutions are found in nature, particularly the skin of the shortfin mako shark. The riblet microstructures have been shown to reduce drag, offering a promising method for energy reduction in various industries. This study investigates the effectiveness of riblet microstructures in reducing wall shear stress and skin friction in laminar flow. The flow over a flat plate is compared with flow over a riblet-structured surface, considering the impact of the temperature of the fluid. Results show that as temperature increases, shear wall stress and skin friction increase, making the riblet microstructures less effective. While riblets show potential in drag reduction, the associated fabrication and installation costs may outweigh the energy savings regarding laminar flow
Advisor Impacts On Student Learning In Undergraduate Engineering SAE Competition Projects
Get PDFThis study examines the effects of advisor characteristics on student learning in large scale undergraduate engineering project competitions. A survey was conducted to measure statistical significance between student ratings of their advisors and student ratings of their learning in key skill areas. Additional items measured include demographics and project characteristics which allowed for additional analyses. The purpose of this study was to identify areas of improvement for project advisors to advance the learning potential for student participants. The survey was distributed in an online format to students participating in five SAE University Program projects. Collected data was analyzed using Kendall’s Tau-b correlations and chi-square tests of association. Findings indicate small to medium positive associations between advisor characteristics and student learning. Differences were also found between advisor presence on the project and advisor ratings. Student learning with a low rated advisor showed no significant difference from student learning when an advisor was considered not present. By comparison, student learning with a high rated advisor was significantly higher than when an advisor was considered not present. Findings from this study represent important information for advisors wishing to improve student learning experiences and for academic programs wishing to incorporate a project based curriculum
Investigation Of Gas Injection EOR In Conventional And Unconventional Reservoirs Based On Laboratory Experiments And Field Pilot Tests
Get PDFCurrently, fossil fuels (including oil, natural gas, and coal) are still the dominant energy sources in the United States. However, their extraction and utilization generate a significant volume of carbon dioxide (CO2) and associated gases, such as methane (CH4), ethane (C2H6), propane (C3H8), etc. Injecting these gases back into deep oil reservoirs offers a practical means to enhance oil recovery while reducing air pollution. The target formations are usually characterized by good porosity and permeability to ensure sufficient injectivity and storage capacity. However, recent unconventional reservoir development indicated that tight formations could also be potential targets for enhanced oil recovery (EOR) using gas injection despite their relatively low matrix porosity and permeability. Abundant fractures provide flow paths for the injected gas to flow through the fractured tight reservoirs. The goal of this research is to extend the gas EOR technologies from conventional reservoirs to unconventional reservoirs and fill the gap between theoretical studies and field implementations for unconventional reservoirs. Given the availability of research resources and data, this study mainly focuses on gas injection EOR in both naturally fractured conventional and hydraulically fractured unconventional reservoirs in North Dakota. The first reservoir studied is Dickinson Lodgepole Mounds (DLM) which is beneath the city of Dickinson, North Dakota. The mound structures have abundant natural fractures but relatively low matrix porosity (2%–6%) and permeability (0.1–10 md). Core samples from the reservoir are used in laboratory investigations (Chapter 3). Contact angle measurements show the reservoir is strongly oil-wet. Interfacial tension (IFT) and minimum miscibility pressure (MMP) measurements illustrate the interactions between oil, water, and CO2. Results show that there is a strong IFT between oil and water regardless of reservoir pressure while CO2 can reduce the IFT effectively. Core samples are saturated with oil and then flooded with water to mimic the water flooding mechanisms in the reservoir. Both miscible CO2 and rich gas flooding tests are then conducted to observe the EOR response under reservoir conditions. Experimental results show that water could only displace a minor amount of oil from the rock matrix while CO2 and rich gas components could recover as much as 44% and 80% of oil in the cores, respectively. Based on the literature review presented in this study, the implementation of EOR in unconventional reservoirs is still in an early stage compared to their deployment in conventional reservoirs. Although numerous laboratory experiments and modeling efforts have been conducted to explore EOR in unconventional reservoir plays, only limited research has been reported to investigate field-level EOR implementations and the corresponding monitoring strategies. Aimed at advancing gas injection EOR technologies in unconventional reservoirs, this study comprised a series of field case analysis activities to bridge the gap between theoretical study and actual field applications. Twenty-four EOR pilot tests are collected from the major unconventional plays in North America to evaluate the performance of different EOR technologies (Chapter 4). Detailed EOR performance evaluation and reservoir monitoring studies are performed to reveal the key variables involved in actual EOR implementations in unconventional reservoirs (Chapters 5 and 6). Fit-for-purpose experiments and simulations are performed (Chapter 7) to investigate the effects of injection rate and pressure on EOR performance, as well as to reveal the effectiveness of huff ‘n’ puff (HnP) cycles in actual field operations. The selection of injection rate and pressure as key parameters for investigation is based on field observations and communications with oil and gas operators because these two parameters play critical roles in both facility design and overall cost for an EOR project. Results show that miscible EOR with high gas injection rate and pressure is required for effective field operations because the injected gas needs to penetrate and extract oil from the tight matrix. Experimental results indicate that there is a correlation between oil recovery and the logarithm of core volume for miscible EOR. Immiscible gas EOR could not yield a satisfactory EOR response in depleted unconventional reservoirs where not much oil remains in fractures. This is because the injected gas tends to flow through fractures instead of penetrating the matrix to interact with oil. Results also show that reaching minimum miscibility pressure does not guarantee an optimum EOR operation in unconventional reservoirs. Pressure higher than MMP is preferred in field operations. When designed properly, up to a tenfold oil production rate boost is achievable in field applications within a short period. However, such a high-performance operation is only effective in the first several HnP cycles due to the limited gas penetration depth into the rock matrix
“How Can I Teach When I Was Not Taught How?”: Teacher Education For Mother Tongue Instruction For STEM In Southwest Nigeria
Get PDFIn this qualitative study, the experiences, training, and challenges of teachers in primary schools in a community in southwest Nigeria were explored. The purpose of this study was to identify the experiences of teachers about their training for mother tongue instruction and how they teach pupils with the mother tongue or local language of the community, the challenges faced by teachers in teaching with the mother tongue, and the strategies used by teachers to overcome the challenges. This study found that teachers received no training and there is no curriculum for the training of teachers to teach in the mother tongue or local language, pupils understand better in their mother tongue, teachers face challenges such as language disparity, lack of orthographs in the local language, difficulty in teaching scientific words in the local language, lack of implementation and funding, teachers adapted methods such as collaboration with learners, and the use of technology in teaching to address the challenges they face. The information gathered helps policy makers, policy implementers, and institutions of higher education to know the importance of teacher training in achieving the aim of the language of education policy. This study concludes with a syllabus designed to train teachers in higher institutions in the southwest of Nigeria. This syllabus will aid the training of teachers and solve the challenge of poor teacher training in mother tongue instruction