Open Research Oklahoma (Oklahoma State Univ.)
Not a member yet
42035 research outputs found
Sort by
Numerical characterization of the thermal performance of horizontal geo-exchange pipes
No full textGround source heat pump systems offer efficient and sustainable heating and cooling solutions; however, traditional vertical boreholes involve high capital costs associated with drilling, hindering widespread adoption. Recent research introduces a novel approach by integrating geothermal heat exchangers into steel helical piles within building foundations, known as "Geo-Piles." These devices, extending typically 50 ft to 100 ft into the ground, serve a dual purpose (structural and thermal) and show promise as cost-effective alternatives. Further advancements explore the use of plastic as a casing material, for thermal-only systems, enhancing affordability and enabling standalone system deployment without relying on extensive new construction projects. This paper investigates plastic geo-exchange pipes (PGEPs), designed similarly to Geo-Piles, aiming to reduce costs by implementing a horizontal installation method at depths comparable to other forms of linear utility infrastructure. Numerical modeling was employed to assess the system's performance at three depths—15 ft, 18 ft, and 21 ft and was then compared to a vertical configuration. The results indicate that with every additional 3 feet of depth in the horizontal configuration, there is an enhancement in capacity of 0.5 tons for every 200 feet of PGEP. Moreover, the 18-ft configuration exhibits exceptional thermal performance while simultaneously reducing installation space and potentially meeting permit requirements, showcasing its potential as an economical and efficient solution in the realm of ground source heat pump systems
Celebrating women in architecture
Get PDFThroughout history, the architectural realm has often marginalized the influential designs and unwavering determination of women, downplaying their contributions to human ingenuity and creativity. This poster session discusses the rationale, planning, implementation, and preliminary results of building a comprehensive 'Women in Architecture' library collection. Through a curated selection of resources, I aimed to illuminate the indelible mark women have left on the architectural landscape. Shining a light through a historical lens and promoting contemporary practitioners. The collection uncovers the stories of pioneering female architects who defied societal norms and shattered glass ceilings, their innovative designs forever shaping our cities, structures, and the spaces we inhabit. The library collection portrays women in architecture, presenting their diverse viewpoints, groundbreaking designs, and unyielding determination. It provides a platform for aspiring architects, particularly young women, to connect with the legacies of these trailblazers, fostering a sense of empowerment and belonging within the profession.Librar
Co-parenting: The unique role of fathers
No full textThe Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311
House of algebraic integers symmetric about the unit circle
No full textWe give a Schinzel-Zassenhaus-type lower bound for the maximum modulus of roots of a monic integer polynomial with all roots symmetric with respect to the unit circle. Our results extend a recent work of Dimitrov, who proved the general Schinzel-Zassenhaus conjecture by using the Pólya rationality theorem for a power series with integer coefficients, and some estimates for logarithmic capacity (transfinite diameter) of sets. We use an enhancement of Pólya’s result obtained by Robinson, which involves Laurent-type rational functions with small supremum norms, thereby replacing the logarithmic capacity with a smaller quantity. This smaller quantity is expressed via a weighted Chebyshev constant for the set associated with Dimitrov’s function used in Robinson’s rationality theorem. Our lower bound for the house confirms a conjecture of Boyd.Mathematic
Trusting that which is present: The practice of free-hand portraiture
No full textJoin self-taught portrait artist, Metadata Librarian, and Assistant Professor of Professional Practice, Bailey Hoffner, in a demonstration and group exploration of free-hand portraiture. Bailey will share briefly about her non-traditional path towards visual art – including being adult-diagnosed autistic – and how the practice of free-hand portraiture and drawing has become a regular practice of trust in her life.
Multiple drawing modalities will be available, with the option to draw from an image or to engage in live model drawing with one another and/or the instructor. All skill and experience levels are welcome, and anyone who doesn’t think they can draw is encouraged to attend. We will be using pen, paper, and oil pastels.
This event is intended as a regenerative break from productivity and hustle culture, with a mind towards encouraging individual and community wellness for OSU’s FCGE community. We hope you will join us.Librar
Effect of nitrogen rate and timing on forage sorghum production and quality
No full textForage sorghum (Sorghum sudanense) is a summer annual sorghum-sudan hybrid that is a high yielding and high-quality source of feed for livestock. Forage sorghum can produce multiple biomass harvests in a single growing season. Because of the high yield of forage sorghum, this crop is a valuable choice for producers in Oklahoma and surrounding regions with heavily dominated livestock production. Applications of nitrogen (N) fertilizer can benefit forage sorghum yield; however, understanding how N application rate and timing affect forage quality such as protein and digestible feed values is critical. Therefore, this project evaluated the effect of N fertilizer rate and timing on forage sorghum biomass yield and quality in north central Oklahoma. The study consisted of five site years of data collected during the 2021, 2022, and 2023 growing seasons, and two harvests were conducted at each site each year. The treatment structure of the study included four N rates and a zero-N check. Three N rates were evaluated as split applications, while all four rates were evaluated as pre-plant applications. N rates ranged from 56 kg/ha⁻¹ to 224 kg/ha⁻¹. The side dress application of N in the split treatments was applied after the first biomass collection. The N source was urea ammonium nitrate (UAN) solution 28 and was broadcast applied. This study found a positive correlation between N applied and biomass produced with no adverse effects on forage quality
Co-operative marketing of livestock
No full textThe Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311
Emergency home vegetable garden
No full textThe Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311
Improving garden soil fertility
No full textThe Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311
Meat and feces: Oklahoma’s meat eating dung beetle
No full textdark triadpersonalityemojisemoticonsBig Five