2,749 research outputs found

    Intentional Recruiting: Using business intelligence, data mining, and predictive analytics to identify characteristics of those students who enroll, and graduate; in support of university enrollment management

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    Using business intelligence (BI) and archival data from a division II, public comprehensive, university in Washington State, the researcher identified specific characteristics of those students who enrolled, persisted and completed to undergraduate degree attainment. These characteristics created an applicant profile to be used in future enrollment management activities for intentional recruiting, while the predictive models for enrollment and completion inform administration to improve tuition revenue planning and budgeting, and to forecast future enrollment yield

    Degradation and forgone removals increase the carbon impact of intact forest loss by 626%

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    Intact tropical forests, free from substantial anthropogenic influence, store and sequester large amounts of atmospheric carbon but are currently neglected in international climate policy. We show that between 2000 and 2013, direct clearance of intact tropical forest areas accounted for 3.2% of gross carbon emissions from all deforestation across the pantropics. However, full carbon accounting requires the consideration of forgone carbon sequestration, selective logging, edge effects, and defaunation. When these factors were considered, the net carbon impact resulting from intact tropical forest loss between 2000 and 2013 increased by a factor of 6 (626%), from 0.34 (0.37 to 0.21) to 2.12 (2.85 to 1.00) petagrams of carbon (equivalent to approximately 2 years of global land use change emissions). The climate mitigation value of conserving the 549 million ha of tropical forest that remains intact is therefore significant but will soon dwindle if their rate of loss continues to accelerate

    Near-field spectroscopy of Dirac plasmons in Bi2Se3 ribbon arrays

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    Plasmons supported in the massless electron surface states of topological insulators (TIs), known as Dirac plasmons, have great potential in next generation optoelectronics. However, their inherent confinement to the surface makes the investigation of Dirac plasmons challenging. Near-field techniques provide the ideal platform to directly probe Dirac plasmons due to the sensitivity to evanescent fields at the surface. Here, we demonstrate the use of aperture near-field spectroscopy for the investigation of localized terahertz (THz) Dirac plasmon resonances in Bi2Se3 ribbon arrays with widths ranging from 10 to 40 µm. Unlike scattering THz near-field techniques, the aperture method is most sensitive to plasmons with the relevant lower-momenta corresponding to plasmon wavelengths on the scale of ∼20 µm. The combination of THz time-domain spectroscopy and aperture near-field microscopy enables sampling of localized Dirac plasmons in the near-field zone in the 0.5–2.5 THz range. We map the plasmon dispersion, which reveals a coupled plasmon–phonon polariton interaction. The near-field spectra show a higher contrast of the upper polariton branch in comparison with far-field observations. The information revealed by aperture near-field spectroscopy could deepen our understanding of the behavior of Dirac plasmons, leading to the potential development of real-world TI devices

    Single-source precursors for ternary chalcopyrite materials, and methods of making and using the same

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    A single source precursor for depositing ternary I-III-VI.sub.2 chalcopyrite materials useful as semiconductors. The single source precursor has the I-III-VI.sub.2 stoichiometry built into a single precursor molecular structure which degrades on heating or pyrolysis to yield the desired I-III-VI.sub.2 ternary chalcopyrite. The single source precursors effectively degrade to yield the ternary chalcopyrite at low temperature, e.g. below 500.degree. C., and are useful to deposit thin film ternary chalcopyrite layers via a spray CVD technique. The ternary single source precursors according to the invention can be used to provide nanocrystallite structures useful as quantum dots. A method of making the ternary single source precursors is also provided

    Duration of Effectiveness of Permethrin-Treated Clothing to Prevent Mosquito Bites Under Simulated Conditions

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    Presented for World Environmental Health Day, September 26, 2016 in Greenville, North Carolina.Biological hazards such as exposure to ticks and mosquitoes can affect worker health. Permethrin is a repellant/insecticide approved for human use by the Environmental Protection Agency. Permethrin-treated clothing is commercially available to the public. Permethrin-treated clothing (50% cotton/50% nylon) has been shown to retain repellency through 70 washings. Work attire differs between state and consulting foresters, park rangers, etc.; hence, variation in protection from vector borne disease may existThis study was funded by the Southeast Center for Agricultural Health and Injury Prevention (# 3049025288-14-060)

    Effects of Blood Meal Source on Aedes albopictus Life Table Characteristics and Vector Competence for Dengue Virus

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    Presented for World Environmental Health Day, September 26, 2016 in Greenville, North Carolina.Commercially available blood can be used as an alternative to live animals to feed mosquitoes; however, the extent to which alternative blood sources affect mosquito vector competence for dengue virus (DENV, familyFlaviviridae, genus Flavivirus) is unknown and may have implications for evaluating results of laboratory vector competence experiments. We aim to improve mosquito colony propagation techniques and inform future research using artificial blood delivery methods to assess vector competence. Objective •To determine the extent to which commercially available blood source affects life table characteristics and vector competence of Aedes albopictusfor DENV

    Calcium/calmodulin-dependent kinase kinase 2 regulates hematopoietic stem and progenitor cell regeneration

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    Hematopoietic stem and progenitor cells (HSPCs) are predominantly quiescent in adults, but proliferate in response to bone marrow (BM) injury. Here, we show that deletion of Ca2+/calmodulin (CaM)-dependent protein kinase kinase 2 (CaMKK2) promotes HSPC regeneration and hematopoietic recovery following radiation injury. Using Camkk2-enhanced green fluorescent protein (EGFP) reporter mice, we found that Camkk2 expression is developmentally regulated in HSPC. Deletion of Camkk2 in HSPC results in a significant downregulation of genes affiliated with the quiescent signature. Accordingly, HSPC from Camkk2 null mice have a high proliferative capability when stimulated in vitro in the presence of BM-derived endothelial cells. In addition, Camkk2 null mice are more resistant to radiation injury and show accelerated hematopoietic recovery, enhanced HSPC regeneration and ultimately a prolonged survival following sublethal or lethal total body irradiation. Mechanistically, we propose that CaMKK2 regulates the HSPC response to hematopoietic damage by coupling radiation signaling to activation of the anti-proliferative AMP-activated protein kinase. Finally, we demonstrated that systemic administration of the small molecule CaMKK2 inhibitor, STO-609, to irradiated mice enhanced HSPC recovery and improved survival. These findings identify CaMKK2 as an important regulator of HSPC regeneration and demonstrate CaMKK2 inhibition is a novel approach to promoting hematopoietic recovery after BM injury

    Perspectives on flu vaccination advertisement messaging in the era of COVID-19: Thematic analysis centering adult Black voices

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    Influenza (flu) is an infectious, respiratory disease that causes substantial burden and mortality, and Non-Hispanic Black people experience profound disparities in flu disease burden in the United States. One contributor to flu disease disparities is lower flu vaccination rates among Black populations. This qualitative study was conducted during the COVID-19 pandemic and used the Public Health Critical Race Praxis framework to center and elicit Black adults’ perspectives of desired flu vaccine messaging. This work builds upon efforts to increase access to flu vaccinations and recommendations are provided to aid in tailoring flu vaccine messaging via a health equity lens. Recommendations for flu messaging include: 1) increased transparency in calling out racial disparities in flu disease burden through the use of local statistics, 2) being upfront with provision of flu vaccine information in easy-to-understand language when addressing concerns, and 3) providing desired education around what the vaccine is doing to one’s body, what the ingredients are, potential side effects and normalizing side effects, and the duration of protection elicited by vaccination. Recommendations also highlight the importance of incorporating the family/community/social context in flu vaccination messaging and for targeted messaging to address the most vulnerable while also providing reasons why persons who may consider themselves to not be vulnerable to the flu (i.e., healthy, no risk factors) should be vaccinated (e.g., get vaccinated in order to reduce exposure risk to your grandmother)
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