Open Research Oklahoma (Oklahoma State Univ.)
Not a member yet
42035 research outputs found
Sort by
Comfortable bedroom
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
Northern Oklahoma College drainage design
No full textThe Northern Oklahoma College Enid campus previously had a 3-acre pond fed by a 185-acre drainage basin, but the infrastructure for recreational activities like swimming has deteriorated, resulting in erosion, sedimentation, and water quality issues. The project's goal is to revive the region by encouraging student and public engagement in a green space built for outdoor recreation while also improving stormwater management, sustainability, and environmental resilience
Translanguaging practices in higher education to teach across content areas in Belize: A multicase study
No full textThis study aimed to analyze four tertiary educators' perceptions of their axiological language ethos and practical teaching pedagogy at the tertiary level in Belize. This study describes the professors’ inveterate language ideologies and their proclivity towards Translanguaging, specifically, how they incorporate Translanguaging in their teaching.
This qualitative multicase research began with a purposive recruitment survey that invited four participants best suited to explore the research questions. Data collection consisted of class observations, interviews, class observation protocol sheets, and memos documenting Translanguaging moves. Findings: Datum revealed that by default, one tertiary educator, disciplined in the humanities, holds a Translanguaging stance, designs, and shifts at various spectrums. These pedagogical moves manifested due to their post-colonial educational backgrounds. They naturally allow Belizean students to freely express themselves using their full linguistic repertoire to engage with the content and facilitate learning.
The evidence shows these educators do not use an English-only approach to teaching; instead, they use English-plus instruction. Implications: In Belize, the educational language policy mandates English as the official language of instruction while acknowledging the country’s rich and diverse sociolinguistic ecology. The policy “encourages the use of native/home languages, where necessary, to facilitate learning” (Ministry of Education, 2000, p. 183). However, the policy provides no framework for incorporating native/home languages in the classroom. A declaration to take action on language preservation states the government will “Ensure the development of education policies that promote minority languages as mediums of instruction in the education system” (Belize National Cultural Policy, 2016, p. 8).
This research shares how Belizean educators can purposefully decolonize education in Belize by employing translanguaging pedagogical practices and using English-plus approaches to instruction and teaching
Annual report, Extension Division: 1925-1926 Oklahoma Agricultural and Mechanical College, Stillwater, 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
Siegebreaker: an SDN based practical decoy routing system
No full textDecoy Routing (DR), a promising approach to censorship circumvention, uses routers (rather than end hosts) as proxy servers. Users of censored networks, who wish to use DR, send specially crafted packets, nominally addressed to an uncensored website. Once safely out of the censored network, the packets encounter a special router (the Decoy Router) which identifies them using a secret handshake, and proxies them to their true destination (a censored site).However, DR has implementation problems: it is infeasible to reprogram routers for the complex operations required. Existing DR solutions fall back on using commodity servers as a Decoy Router. But as servers are not efficient at routing, most web applications show poor performance when accessed over DR. A further concern is that the Decoy Router has to inspect all flows in order to identify the ones that need DR. This may itself be a breach of privacy for other users (who neither require DR nor want to be monitored).In this paper, we present a novel DR system, SiegeBreaker (SB), which solves the aforementioned problems using an SDN-based architecture. Previous proposals involve a single unit which performs all major operations (inspecting all flows, identifying the DR requests and proxying them). In contrast, SB distributes the tasks for DR among three independent modules. (1) The SDN controller identifies DR requests via a covert, privacy preserving scheme, and does not need to inspect all flows. (2) The reconfigurable SDN switch intercepts packets, and forwards them to a secret proxy efficiently. (3) The secret proxy server proxies the client’s traffic to the censored site. Our modular, lightweight design achieves performance comparable to direct TCP downloads, for both in-lab setups, and Internet based tests involving commercial SDN switches.Computer Science
Effect of dietary insulinogenic amino acid restriction on glucose metabolism in neonatal pigs
No full textMany commercial human infant formulas contain a protein content greater than what is naturally found in human breast milk. Prolonged consumption of protein greater than nutritional requirements in early infancy has been linked to increased risk of obesity and type 2 diabetes, which is characterized by decreased insulin sensitivity and impaired glucose homeostasis. Due to the negative impacts of low-protein diets on infant growth, their use in commercial formula is limited. Alternatively, dietary restriction of insulinogenic amino acids (IAA, i.e., Leu, Ile, Val, Thr, Phe, Arg, and Ala) may be considered. This study aimed to determine the impact of IAA restriction in formula on glucose and lipid metabolism in a neonatal piglet model for human infants. 32 seven-day-old Yorkshire barrows were randomly assigned to one of three dietary treatment groups for 21 days: 1) NR: 0% IAA restriction; 2) R50: 50% IAA restriction; and 3) R75: 75% IAA restriction; with each diet being isonitrogenous and isocaloric. After 21 days, all animals were sacrificed, and liver, skeletal muscle, and white adipose tissue (WAT) samples were collected. Using RT-qPCR the expression of glucose and lipid metabolism and insulin signaling genes in target tissues was determined. Data were analyzed with Univariate GLM with Dunnett’s post-hoc (SPSS®). Relative to NR, the R75 treatment group increased the mRNA abundance of key rate-limiting glycolytic enzymes and glucose transporters including hepatic glucose transport 1 (GLUT 1), hepatic pyruvate kinase (PFKL), hepatic pyruvate kinase liver type (PKLR), and WAT glucokinase (GCK). R50 increased the mRNA expression of hepatic and muscular PKLR. Insulin signaling markers significantly improved via increased mRNA of muscular serine/threonine kinase 1 (AKT) and insulin receptor substrate 1 (IRS1) when R75 was compared to NR. IAA restriction by 75% increased the mRNA expression of hepatic fibroblast growth factor 21 (FGF-21), with R50 increasing the mRNA expression of hydroxyacyl-CoA dehydrogenase (HADH). In conclusion, restriction of dietary IAA improved glucose and lipid metabolism in a neonatal piglet model likely through increasing the rates of glycolysis via upregulation of key glycolytic pathway enzymes, and gene expression of key enzymes involved in lipid metabolism
Drivers of microbial and enzymatic activity in soil
No full textMicroorganisms are considered major contributors of enzyme activities in soil, yet their relationships and functions vary in the environment and are sometimes inconsistent. Some of the inconsistency may, in part, be due to limited understanding of factors affecting enzyme and microbial activities. In pursuit of a deeper understanding of this relationship, a meta-analysis of over 100 studies encompassing 1000 diverse soil types was conducted. The main objectives were to investigate how climate region, land use type, and basic soil property govern microbial abundance, activity, and community composition as well as to reveal the intrinsic relationship between the microbial community and the activity of acid or alkaline phosphatase in soil. While organic carbon content, pH, and soil texture were primary factors influencing microbial abundance, composition, and activities, these relationships were strongly influenced by climate region. The activities of acid and alkaline phosphatase showed significant and positive correlations with microbial indicators. However, these relationships varied between these two enzymes, stemming from their inherent differences in properties and sources in soil. Based on these results, climate region strongly modulated the relationships between microbial community, enzyme activity, and basic soil properties
Adult clothing demonstration: Second year demonstration no. 3; Textiles
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
Information systems for Oklahoma farmers
Get PDFThe 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
Radical perfluoroalkylation reactions mediated by halogen-bonding photocatalysis
No full textThe addition of different perfluoroalkyl moieties to organic compounds is a frequently investigated method in medicinal chemistry due to their superior solubility, metabolic stability, and bioavailability over their non-fluorinated equivalents. Radical perfluoroalkylation processes provide a milder approach to accessing these compounds. We envisioned that the C–X bond of perfluoroalkyl halides might be directly activated by a halogen-bonding interaction, which would then lead to the formation of an electron donor-acceptor complex (EDA complex) which can be excited with visible light irradiation. We have demonstrated radical perfluoroalkylation reactions where substituted hydroquinones catalytically engage perfluoroalkyl iodides through a halogen-bonding interaction to promote these transformations under visible light irradiation. Our progress on expanding the reaction scope to silyl enol ethers for the α-perfluoroalkylation of ketones will also be presented.
While we have successfully demonstrated this reactivity with perfluoroalkyl iodides, it would be highly beneficial to extend this reactivity to perfluoroalkyl bromides, as these substrates are more readily available commercially and intrinsically more bench-stable than their iodide counterparts. While doing so, we ran into the challenge of C–Br bonds being weaker halogen bond acceptors compared to C–I bonds. Thus, we hypothesized that a more general and robust method would be a Finkelstein substitution of perfluoroalkyl bromides to generate the more reactive perfluoroalkyl iodides in situ. Our progress in implementing this catalytic Finkelstein approach to access perfluoroalkyl bromides via halogen-bonding photocatalysis will be presented.
Finally, the substituted hydroquinone catalyst that we used throughout these studies have a few limitations. Our initial results in developing novel second-generation halogen-bonding photocatalysts which would overcome the drawbacks from the first-generation catalysts will be discussed