Open Research Oklahoma (Oklahoma State Univ.)
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Impact of downtown revitalization on new housing construction
No full textThis paper evaluates the impact of the Main Street Program (MSP), a widely adopted downtown revitalization strategy, on housing markets in rural counties across ten U.S. states from 1990 to 2023. Using Callaway & Sant’Anna difference-in-differences (CSDiD) approach, we analyze data from 543 nonmetropolitan communities, combining building permit records, House Price Index data, and MSP adoption information. We find that MSP implementation significantly increased county-level Home Price Indices, with effects peaking around eight years post-adoption and remaining elevated long-term. The program showed no statistically significant impact on single-family housing permits. These findings suggest that while the MSP enhances property values in treated areas, it does not necessarily drive new construction activity, showing important considerations for policymakers employing downtown revitalization as an economic development strategy
Effects of planting date and variety on yield and quality of snap bean (Phaseolus vulgaris L.) in Oklahoma
No full textAlthough numerous studies have evaluated snap bean (Phaseolus vulgaris L.) pod yield from once-over harvest systems and pod quality at progressing maturities in a given harvest season, few have evaluated yield and pod quality in different seasons of production within the same year and fewer still have evaluated yield and quality from pods harvested at the same pod maturity successively from the same plants. The aim of this study was to determine if snap bean yield or pod quality (pod color and sugar accumulation) differed between plants harvested multiple times in spring and fall planting seasons in north central Oklahoma. Nine snap bean cultivars, including seven green podded and two yellow podded cultivars, were chosen for field production in spring and fall production seasons of 2022 and 2023. Sequential harvest of pods from the same plants and at the same relative stage of pod development occurred weekly for a three week period. Pod yield, pod tristimulus color, and pod sugar concentration were measured. Total pod yield pooled across seasons and years was lower for ‘Sybaris’ at about 4,100 kg ha⁻¹ than for six of the other cultivars whose yield ranged from 7,000 to 8,600 kg ha⁻¹. While pod yield typically increased from 900 to 1,300 kg ha-1 in the first weekly harvest to 3,500 to 3,700 kg ha⁻¹ by the last weekly harvest in the spring season, during the fall season it either decreased in 2022 from 1,900 kg ha⁻¹ in the first weekly harvest to 690 kg ha⁻¹ by the last weekly harvest or remained the same in fall of 2023 at 2,600 to 3,000 kg ha⁻¹ at each weekly harvest, with the decrease in yield in fall, 2022 likely due to sub-optimal low temperatures during pod development. Tristimulus pod color differentiated yellow-podded from green-podded cultivars and while some differences in hue and chroma were evident within snap bean pod color groups, each cultivar maintained its color properties at each harvest across seasons and years of the study. We observed a decrease in total pod sugar concentration from the first to the last harvest from 145.5 to 107.2 mg gm⁻¹, for glucose from 48.4 to 33.0 mg gm⁻¹ and for fructose from 90.7 to 52.0 mg gm⁻¹. We also observed an apparent increase in sucrose concentration from 9.2 to 21.9 mg gm⁻¹ from the first to last pod harvest. Decreasing total and monomeric sugar concentrations, coupled with increasing sucrose concentration, have been documented for overmature snap bean pods which were deemed less desirable due to lower perceived sweetness. In terms of sugar concentration, later harvested snap bean pods in a successive harvest system, even though they were harvested at the same relative stage of maturity as earlier harvested pods, resembled over-mature pods from a once-over harvesting system, perhaps indicating that snap bean plant age influenced pod sugar concentration in a similar manner to pod age
Intersections of the gut microbiota, MA, and diet: A review
No full textThe human gut is well-known to contain trillions of non-human cells, including both prokaryotic and eukaryotic organisms. Collectively known as the gut microbiota, these microorganisms exert influence on nearly all aspects of human health, from digestion and immune function to mental and emotional health. Research has repeatedly shown that the human diet greatly impacts the composition of the gut microbiota; additionally, a dysbiosis or imbalance of the microbiota has been implicated in many human diseases, including the neurodegenerative condition of multiple sclerosis (MS). If gut dysbiosis contributes to the onset or aggravation of MS symptoms, it is logical to assume that a reversal or improvement of the dysbiosis could improve outcomes in MS patients. Furthermore, the influence of diet on the microbiota raises the question of whether dietary habits can be manipulated to treat MS by altering microbiota structure and function. This review explores possible means by which the gut microbiota affects the onset and progression of MS, observes the effects of diet on microbiota composition and function as a metabolome, and ties the two together, investigating biochemical mechanisms by which diet affects the MS disease course through microbial responses to ingested compounds. Possible diet-based, microbiota-mediated treatments for MS patients based on the evidence presented are discussed
Ballistic characterization of meta-configured structures
No full textDrawing inspiration from metamaterials, meta-configured structures (MCS) are investigated to ascertain their ballistic characteristics. In MCS, a confluence of hybrid materials and designs is used to enhance ballistic performance making them amenable to multifunctional integration with acoustic applications. Firstly, ballistic performance of hybrid materials such as silica nanoparticle-impregnated Kevlar (SNK) fabrics was evaluated using gas-gun tests. A loss-compensated model was developed to predict the projectile velocity for gas-guns with greater accuracy. A colloid-based treatment process was developed to impregnate dry nanoparticles into the fabric. Using digital image analytics, a fast, full-field, and cost-effective alternative to conventional inspection techniques for treated fabrics was developed. The flexibility of SNK was evaluated by a new fixed cantilever test. Ballistic tests show that 40 wt.% SNK has ~17 % mass advantage (owing to three less layers) vis-à-vis neat Kevlar for the non-penetrative case due to enhanced friction. SEM imaging reveals nanoparticles agglomerate in yarn interstices, better engaging secondary yarns away from the impact location. A semi-empirical model was developed to predict the kinetic energy absorbed for SNK. Influence of nanoparticle’s material and geometry on ballistic performance of treated fabrics was studied. Silica, alumina, and zinc oxide nanoparticles ranging from 10-125 nm, with spherical or cylindrical shape were considered. The 80-nm silica-treated samples performed significantly better than others due to increased agglomeration and mechanical interlocking. The exit-face damaged zone area acts as a surrogate for energy absorbed correlating well across all samples. Treating the layers in a sample together instead of individually gives nearly 21 % higher energy absorption due to volumetric frictional interactions. Quasistatic yarn pullout tests reveal that the peak pullout force increases with nanoparticle addition until a threshold is reached. Fitting coefficients for various pull-out regimes were calibrated to model yarn pull-out behavior for treated fabrics. Finally, a prototypical MCS combining SNK with other structural materials through a bio-inspired design is fabricated and tested. Fabric pleating was optimized using an analytical model. MCS displayed a 37 % increase in energy absorption over conventional counterparts. MCS is a promising multifunctional structural solution in applications for personal protection, ballistic containment, and military structures
Slowing down for metadata justice: On learning to trust our bodies and ourselves
No full textIndebted to the work of Black women writers Audre Lorde, Angela Davis, and Tricia Hersey, and the continued efforts of library workers from Sandy Berman to Emily Drabinski, this session from Bailey Hoffner will explore why slowing down is not only a viable approach to metadata justice work, but the only sustainable approach allowing us the restful space necessary to: see, understand, and subvert the structural discrimination built into our information systems; imagine and create new systems; truly trust ourselves.
Attendees can expect to:
Understand the necessary steps toward creating an individual and/or group framework for metadata justice, including the essential place of a non-punitive grievance process.
Identify how the persistent fear of scrutiny can contribute to our inability to slow down, if we don’t take the essential first steps of grounding ourselves in our principles.
Assess if they have taken the time and the care to truly consider the impacts of their workLibrar
Association of middle school students’ consumption of energy drinks and concussions: A cross-sectional analysis of the Youth Risk Behavior Surveillance System
No full textIntroduction: In recent years, adolescent consumption of energy drinks has risen steadily. While these drinks can boost performance, they're also linked to increased risk-taking behaviors that might contribute to more young people experiencing concussions. Our main aim was to probe the potential link between energy drink use and concussion rates.Design Methods: Using data from the Youth Risk Behavior Surveillance System (YRBSS), a study involving middle school students across 15 states, we conducted a cross-sectional analysis. This aimed to uncover any correlation between energy drink intake and concussions during physical activities or sports. After estimating the prevalence of energy drink consumption, we used logistic regression, factoring in age, sex, and ethnoracial categories, to evaluate the association.Results: Our study revealed that 14.07% of 11 to 15-year-old middle schoolers consume energy drinks weekly. Among non-consumers, 12.76% had experienced a concussion, while among consumers, the figure was notably higher at 22.42% -a statistically significant difference (AOR 2.03, 95%CI 1.36-3.04).Conclusion: In essence, our findings strongly indicate that middle schoolers who occasionally consume energy drinks are at a higher risk of sustaining concussions compared to non-consumers. This aligns with previous research on performance-enhancing substances and concussion risks. It underscores the urgency of delving deeper into the potential hazards of energy drink consumption among adolescents and implementing measures to cultivate safer habits within this age group
Understanding your irrigation water test report [superseded]
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
Woody plant material for Oklahoma
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
Is second language attrition inevitable after instruction ends? An exploratory longitudinal study of advanced instructed second language users
No full textMost second language acquisition (SLA) research has documented the processes involved in learning second/foreign languages, with few studies focusing on the durability of attained second language (L2) skills once instructed learners/users are no longer receiving formal instruction. The current study examines the effects of continued exposure and peak instructional attainment on the long-term evolution of advanced, instructed L2 learners’ skills following a longitudinal mixed-methods research design. Participants (n = 28) completed an oral proficiency test, an oral interview, and a vocabulary knowledge test at multiple times over an 8-year period, 6 years of which were post-instruction. Results showed that continued exposure contributes to long-term retention (and some further development) of oral proficiency and fluency and that peak attainment at the end of formal instruction is also an important variable for some areas of L2 performance. Additionally, even the participants with limited exposure demonstrated little attrition over time.Englis
Development of the Atmospheric Ionizing Radiation Tissue Equivalent Dosimeter
No full textThis dissertation documents the development, calibration, and field testing of the Atmospheric Ionizing Radiation Tissue Equivalent Dosimeter (AirTED), an instrument designed to measure cosmic radiation exposure at aviation altitudes. AirTED measures energy deposition spectra from both high and low linear energy transfer (LET) ionizing radiation using a tissue equivalent proportional counter (TEPC) and a silicon PIN diode, respectively. A novel TEPC detector head was developed to minimize microphonic noise, alongside custom analog signal processing circuits and PCBs. A Red Pitaya single-board computer was fully implemented as a spectrometer. AirTED was characterized at the Los Alamos Neutron Science Center (LANSCE) using a neutron beam with an energy spectrum similar to that at aviation altitudes. AirTED was deployed on a NASA WB-57 high-altitude research aircraft during two flight campaigns. Measurements of absorbed dose showed an average disagreement of 17% (TEPC) and 5% (silicon diode) when compared to estimates from the CARI-7 computer model. SpaceTED, a modified version of AirTED, was launched to the International Space Station in November 2023 and made continuous measurements for over 10 months. Preliminary results indicate measurements from the TEPC and silicon diode can be combined to produce a single comprehensive LET spectrum. Field testing has demonstrated that AirTED meets its design objectives and operates as intended on aircraft and spacecraft