Open Research Oklahoma (Oklahoma State Univ.)
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Basics of soil bulk density
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
Plans for Oklahoma farm homes
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
Easy to build kitchen cabinets for the remodeled farm home
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
Study on the effect of guanidinium on the stability and performance of halide perovskite solar cells
No full textHalide perovskite solar cells have recently become a focus of interest within the solar energy sector, due to the superior qualities of halide perovskite materials, which include high optical absorption, excellent carrier mobility, long carrier diffusion lengths, low exciton binding energy, and tunable band gap. The ability of halide perovskites to be processed by solutions makes them particularly appealing for low-cost and large-scale production. Despite having attained high power conversion efficiencies that exceed 25%, the instability of perovskite solar cells under environmental factors like temperature, humidity, and light still poses a considerable challenge for commercialization.
This research introduces innovative approaches to address the stability and efficiency challenges of perovskite solar cells. First, we propose the synthesis and utilization of MA-lean mixed Sn-Pb halide perovskite as a moderately stable, low-bandgap perovskite material for solar cell fabrication. Although the efficiency achieved with this material currently stands at around 13%, a marked improvement in stability has been realized. Furthermore, a novel strategy for achieving both stability and efficiency in quasi-2D halide perovskites, using a lead acetate precursor for enhanced crystallization, is presented. This approach has led to an efficiency close to 16%, aligning with the performance of pure 3D perovskites, while offering enhanced stability. Intriguingly, there is compelling evidence of a slow age-induced recrystallization phenomenon, which portends well for the long-term stability of quasi-2D perovskite solar cells. Finally, we explore the integration of quasi-2D halide perovskite materials into quasi-2D/3D heterostructure devices, a strategy designed to further improve stability and solar cell efficiency. These efforts hold the promise of propelling perovskite solar cell technology toward greater efficiency and stability, marking a significant stride in the advancement of sustainable and efficient photovoltaic technology
Systematic review of gender representation in neuroimaging research in drug abuse populations
No full textIntroduction/Objectives: Gender and race disparities in research participation have long plagued fields of biomedical research. These disparities limit the generalizability of research findings and can further perpetuate health disparities for marginalized groups. One such area that is significantly limited by a lack of sample diversity is clinical substance abuse research. A growing body of evidence suggests gender differences in substance uptake, withdrawal, response to medication treatments, and neurocognitive effects. However, there is a marked lack of research further investigating these supposed differences, particularly for non-alcohol drugs of abuse. In the current study, we intended to assess the extent of this issue in neuroimaging studies by systematically reviewing neurocognitive-based drug abuse research. Further, we wished to identify any preliminary gender-based trends in this body of literature.Methods: The database search was conducted on April 25, 2023, in MEDLINE (via PubMed), PsychInfo, and Embase. The search strings used were designed to be broad and were intended to identify original research studies using neuroimaging techniques to assess cognitive functioning in substance users. The resulting articles were screened in a masked, duplicate fashion, with disagreements being resolved through discussion. Data was later extracted from included articles in a similar fashion with discrepancies being resolved by a third researcher. All procedures were conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines.Results: Out of the 22,403 studies yielded by our initial search, 154 studies met the inclusion criteria. We found a notable lack of female participants across the included studies, with women only representing 22.77% of participants. As such, gender proportions within individual studies were often skewed towards men, with only 24.0% of the included studies having a roughly equal or higher percentage (operationalized as a >40% female sample) of female participants. For some drug types, such as cocaine, these proportions were even lower with only 17.24% of studies meeting the >40% female participant threshold. Furthermore, nearly a quarter of the studies did not include any women in their samples. Likewise, few studies performed gender-based data analyses, with 11 of these reporting some type of significant gender difference. However, no major conclusions about neurological gender differences within the context of drug use could be made in the current study due to heterogeneity in study characteristics.Conclusions: We identified a clear gender disparity in imaging-based drug use research participation. Significant efforts by researchers and research institutions must be made in order to expand this body of knowledge. Further, increased exploration into the underlying gender differences of addiction can be used to better inform clinical interventions, possibly leading to improved outcomes for women with substance use disorders
Empowering students through a faculty-student mentorship program
No full textIntroduction/Objective: Diversity and cultural competence in osteopathic medical education are critical to both student success and healthcare delivery in rural, marginalized, and underserved communities. The study assesses an intervention designed to develop a diverse and culturally informed workforce through a faculty-student mentorship program. A 40-hour faculty workshop was administered at a leading college of osteopathic medicine. Seventeen presentations delivered 40 hours of content to ten faculty participants over four months. The primary aim of this research is to evaluate the effectiveness of a Faculty Mentorship Program in enhancing academic success and diversity among students in osteopathic medical education. The secondary objective is to assess how this mentorship program influenced participating students' intent to practice in rural and medically underserved areas. Honoring the mission of our College of Osteopathic Medicine, we hypothesize that program participants demonstrate greater cultural awareness and interest in working in rural and underserved communities.Methods: This study employed a mixed-methods design, utilizing surveys and follow-up interviews to gather comprehensive data. The research was conducted at a US-based College of Osteopathic Medicine. Participants included 10 faculty members and 24 students, all of whom expressed an interest in mentorship. The intervention involved a 40-hour faculty mentorship workshop administered over four months. Following the workshop, each of the ten faculty participants was assigned two to three student mentees, resulting in a total of 24 participating students. The main outcome measures assessed were an increased connection to the field of medicine and the expressed intent to serve in rural and underserved medical practice areas.Results: Initial findings suggest that student participants feel a greater connection to the importance of practicing medicine in rural and medically underserved communities. This presentation will disseminate lessons learned from mentorship program participants.Conclusion: Initial findings from this study indicate a positive impact of the Faculty Mentorship Program on academic success and the enhancement of cultural competencies among both faculty and students. The program effectively raises awareness of the benefits associated with future osteopathic physicians practicing in rural and underserved areas. These findings signal a positive course for mentorship programs in osteopathic medical colleges, establishing a solid foundation for further exploration of this study. Emphasizing the transformative power of faculty mentorship in cultivating a diverse and culturally competent medical workforce, our research evaluates the specific outcomes of the Faculty Mentorship Program, focusing on its ability to enhance cultural competencies among underrepresented faculty and students. The program not only facilitates an increased intent to serve in rural and medically underserved areas but also underscores the importance of well-designed mentorship initiatives in fostering diversity and cultural competence. Participants acknowledge that this sense of belonging significantly strengthens their connection to the practice of medicine and their commitment to serving in culturally diverse and underserved practice areas
4-H Wildlife manual
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
Hyperdense middle cerebral artery sign in the setting of acute cerebral ischemia: A case report
No full textBackground: Non-contrast computed tomography (CT) remains the initial diagnostic study of choice when ischemic stroke is suspected.⁴ This is due to the ability of non-contrast CT to differentiate between hemorrhagic and ischemic stroke.¹ In the setting of acute ischemia, one of the earliest markers on non-contrast CT is the hyperdense middle cerebral artery sign (HMCAS).³˒⁵ This hyperdensity is suggestive of thromboemboli within an artery, most commonly the middle cerebral artery (MCA), causing vascular occlusion. Identification of HMCAS is diagnostically advantageous, expediting the patient towards anticoagulation therapy or surgical intervention. Therefore, the recognition of early manifestations of cerebral ischemia on non-contrast CT is imperative for accurate diagnosis and therapeutic guidance.Case Presentation: Our patient was a 40-year-old female with a past medical history of non-ST elevated myocardial infarction, peripheral artery disease, and deep vein thromboembolism who presented to the emergency room with respiratory distress, nausea, and vomiting. Upon arrival, the patient was unable to follow commands, obtunded, and hypoxic with a room oxygen saturation of 86%. Given the patient's altered mental status, non-contrast CT, CT angiogram, and CT perfusion studies of the head were ordered.Imaging revealed high-attenuation of the right middle cerebral artery (MCA) signifying arterial occlusion without intracranial hemorrhage. Reevaluation of the patient showed new-onset left-sided facial drooping as well as left upper and lower extremity paralysis. Thrombolytics were not administered due to the patient’s symptomatic onset exceeding the therapeutic window. Thrombectomy was deemed a suitable treatment and the patient was transferred for urgent neuro-intervention evaluation.Thrombectomy resulted in complete reperfusion of the right MCA with successful stabilization of the patient. Post-surgical CT demonstrated right basal ganglia parenchymal hemorrhage transformation and effacement of the right anterior horn. Days later, repeat CT revealed stabilization of the basal ganglia hemorrhage with expected evolution.The following month, the patient revisited the emergency department with encephalopathic changes, intraparenchymal hemorrhage of the brain, and multiple clots occluding branches of the abdominal aorta. Unfortunately, the patient passed away at this time and successful interventions ceased.Discussion: In this study, our patient presented to the emergency room with a history of chronic vascular disease and new-onset neurological symptoms. Subsequent imaging revealed HMCAS on non-contrast CT suggestive of acute ischemia. Additional imaging confirmed a thromboembolic occlusion within the first segment of the right MCA. Due to the significance of MCA involvement, neurosurgery was consulted and an endovascular thrombectomy was performed to initiate MCA reperfusion. Our findings coincide with poor clinical outcomes and neurologic deterioration in patients with ischemic stroke presenting with a HCMAS.Conclusion: The presence of the HMCAS on non-contrast CT is specific for acute embolism and shows an increased likelihood of poor clinical outcomes with associated acute neurological deterioration. Moreover, additional studies can be useful in reducing disability by identifying salvageable tissue before initiating reperfusion therapy.¹ Due to the increased morbidity and mortality, it is crucial to be aware of early ischemic signs on non-contrast CT to guide therapeutic intervention in patients with HMCAS
From tweets to the streets: The offline mobilizing power of populist leaders' online rhetoric
No full textDoes negative messaging from populist leaders on social media increase the number of protests occurring in that country? Can populist leaders use social media to manipulate supporters into committing acts of political violence on their behalf? This study relies on previous research that shows the development of certain emotions and attitudes increases the likelihood of protests and political violence. I argue that higher amounts of negative messaging from populist leaders on social media generate feelings of anger across the ideological spectrum, which in turn makes participation in protests more likely. Alternatively, I argue that higher amounts of dehumanizing messaging from populist leaders on social media generate feelings of contempt, which instead makes political violence more likely. To test this, I compare language from the tweets of Trump, Bolsonaro, and Modi to protest and political violence event data from their respective countries. I find mixed support for both claims, but dehumanization has the strongest effects. These findings suggest the need for further research with more sophisticated methods to determine what systemic political effects populist leaders using social media can have
Chlordane and toxaphene for grasshopper control
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