103 research outputs found

    ESTIMATION OF ATMOSPHERIC CONDITIONS OVER A LONG HORIZONTAL PATH USING MULTI-FRAME BLIND DECONVOLUTION (MFBD) TECHNIQUES IN COMPARISON WITH DELAYED TILT ANISOPLANATISM (DELTA) SOFTWARE

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    The potential to track and view objects in space from the ground with greater near real time knowledge of the intervening turbulence would be a revolutionary capability. The objective of this thesis is to cross-validate two separate methods used to estimate the Fried parameter. This verification is a step toward a commercial grade product that would make real-time estimates of the turbulence strength along an optical path from a ground-based observatory to a satellite in orbit around the Earth. Michigan Technological University has developed a multi-frame blind deconvolution (MFBD) algorithm used to estimate r0 and it was tested against MZA’s Delayed Tilt Anisoplanatism (DELTA) software. Important realizations about MFBD initialization parameters were made during this study. Key results from the study included that approximately 62% of the final MTU r0 estimates were in between the DELTA r0A and r0B estimates. Only 8.3% of all of the results are more than 1 cm outside of the r0A and r0B range. The outcome of these experiments has shown that overall the MTU results fall very close to or within the range of the estimated DELTA results

    Considerations for Occupational Therapists in Developing Community-Level Interventions for Youth with High Adverse Childhood Experiences (ACEs)

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    Drug misuse likely contributes to the over 30,000 children in foster care and to the 24.2% of children who have experienced two or more adverse childhood experiences (ACEs). Twenty-five percent of children are living in poverty, with nearly half of those living in single-parent households. Among the national guidelines to preventing ACEs are connecting youth with positive activities and providing family relationship enhancement opportunities. We believe the profession of occupational therapy can help contribute to the mental and behavioral health care workforce in a greater capacity than is currently used. Many children are not afforded the opportunity to engage in novel leisure pursuits that are essential for positive mental health function and well-being. Occupational therapists can assist in creating a culture of health and equity for youth by harnessing the power of play and leisure to promote self-healing communities

    Principal variable selection to explain grain yield variation in winter wheat from features extracted from UAV imagery

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    Background: Automated phenotyping technologies are continually advancing the breeding process. However, collecting various secondary traits throughout the growing season and processing massive amounts of data still take great efforts and time. Selecting a minimum number of secondary traits that have the maximum predictive power has the potential to reduce phenotyping efforts. The objective of this study was to select principal features extracted from UAV imagery and critical growth stages that contributed the most in explaining winter wheat grain yield. Five dates of multispectral images and seven dates of RGB images were collected by a UAV system during the spring growing season in 2018. Two classes of features (variables), totaling to 172 variables, were extracted for each plot from the vegetation index and plant height maps, including pixel statistics and dynamic growth rates. A parametric algorithm, LASSO regression (the least angle and shrinkage selection operator), and a non-parametric algorithm, random forest, were applied for variable selection. The regression coefficients estimated by LASSO and the permutation importance scores provided by random forest were used to determine the ten most important variables influencing grain yield from each algorithm. Results: Both selection algorithms assigned the highest importance score to the variables related with plant height around the grain filling stage. Some vegetation indices related variables were also selected by the algorithms mainly at earlier to mid growth stages and during the senescence. Compared with the yield prediction using all 172 variables derived from measured phenotypes, using the selected variables performed comparable or even better. We also noticed that the prediction accuracy on the adapted NE lines (r = 0.58–0.81) was higher than the other lines (r = 0.21–0.59) included in this study with different genetic backgrounds. Conclusions: With the ultra-high resolution plot imagery obtained by the UAS-based phenotyping we are now able to derive more features, such as the variation of plant height or vegetation indices within a plot other than just an averaged number, that are potentially very useful for the breeding purpose. However, too many features or variables can be derived in this way. The promising results from this study suggests that the selected set from those variables can have comparable prediction accuracies on the grain yield prediction than the full set of them but possibly resulting in a better allocation of efforts and resources on phenotypic data collection and processing

    Vitamin B2 supplementation for laying and parent hens in organic poultry systems

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    This practice abstract provides recommendations for organic poultry systems to meet the Vitamin B2 needs of the animals. Data from project experiments indicate that hens in or- ganic systems can be supplemented with a maximum level of 4.0 mg/kg feed without impacting the performance and animal health of the hens and their offspring. This level of supplementation is lower than the 5-7mg/kg feed recom- mended by Blum et al. (2015). This practice abstract is recommended for organic poultry farmers across Europe

    Considerations for Occupational Therapists in Developing Community-Level Interventions for Youth with High Adverse Childhood Experiences (ACEs)

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    Drug misuse likely contributes to the over 30,000 children in foster care and to the 24.2% of children who have experienced two or more adverse childhood experiences (ACEs). Twenty-five percent of children are living in poverty, with nearly half of those living in single-parent households. Among the national guidelines to preventing ACEs are connecting youth with positive activities and providing family relationship enhancement opportunities. We believe the profession of occupational therapy can help contribute to the mental and behavioral health care workforce in a greater capacity than is currently used. Many children are not afforded the opportunity to engage in novel leisure pursuits that are essential for positive mental health function and well-being. Occupational therapists can assist in creating a culture of health and equity for youth by harnessing the power of play and leisure to promote self-healing communities

    Neutral Gas Outflows and Inflows in Infrared-Faint Seyfert Galaxies

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    Previous studies of the Na I D interstellar absorption line doublet have shown that galactic winds occur in most galaxies with high infrared luminosities. However, in infrared-bright composite systems where a starburst coexists with an active galactic nucleus (AGN), it is unclear whether the starburst, the AGN, or both are driving the outflows. The present paper describes the results from a search for outflows in 35 infrared-faint Seyferts with 10^9.9 < L_IR/L_sun < 10^11, or, equivalently, star formation rates (SFR) of ~0.4 -- 9 solar masses per year, to attempt to isolate the source of the outflow. We find that the outflow detection rates for the infrared-faint Seyfert 1s (6%) and Seyfert 2s (18%) are lower than previously reported for infrared-luminous Seyfert 1s (50%) and Seyfert 2s (45%). The outflow kinematics of infrared-faint and infrared-bright Seyfert 2 galaxies resemble those of starburst galaxies, while the outflow velocities in Seyfert 1 galaxies are significantly larger. Taken together, these results suggest that the AGN does not play a significant role in driving the outflows in most infrared-faint and infrared-bright systems, except the high-velocity outflows seen in Seyfert 1 galaxies. Another striking result of this study is the high rate of detection of inflows in infrared-faint galaxies (39% of Seyfert 1s, 35% of Seyfert 2s), significantly larger than in infrared-luminous Seyferts (15%). This inflow may be contributing to the feeding of the AGN in these galaxies, and potentially provides more than enough material to power the observed nuclear activity over typical AGN lifetimes.Comment: 17 pages, 12 figures, published in ApJ (article updated 12/30/09

    Small-volume potentiometric titrations: EPR investigations of Fe-S cluster N2 in mitochondrial complex

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    EPR-based potentiometric titrations are a well-established method for determining the reduction potentials of cofactors in large and complex proteins with at least one EPR-active state. However, such titrations require large amounts of protein. Here, we report a new method that requires an order of magnitude less protein than previously described methods, and that provides EPR samples suitable for measurements at both X- and Q-band microwave frequencies. We demonstrate our method by determining the reduction potential of the terminal [4Fe-4S] cluster (N2) in the intramolecular electron-transfer relay in mammalian respiratory complex I. The value determined by our method, Em7 = − 158 mV, is precise, reproducible, and consistent with previously reported values. Our small-volume potentiometric titration method will facilitate detailed investigations of EPR-active centres in non-abundant and refractory proteins that can only be prepared in small quantities

    UO Art MFA 2022

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    36 pagesEach year the terminal creative projects from our MFA candidates elevate and activate discourse and pleasure in the Art Department and across the College of Design with an ethos of fearless possibility. Their creative research of new knowledge, or the rearrangement of old knowledge, brings with it the sense that new texts have been penned, and new discourses activated. The University of Oregon MFA Art 2022 Exhibition culminates three years of independent research and experimentation by a cohort of eight artists whose various practices engage a broad range of inquiry, from expressions of the personal and diaristic to the examination and fictionalization of history, gender, magical thinking, cinema tropes, and the natural world. Over the last three years these candidates have navigated generational complexities while trying to transform their experiences and transcend the moment. This year marks the 99th year of the University’s MFA degree, making it one of the oldest programs in the country. As the program’s centennial moment approaches, we watch The MFA Graduates of 2022 realize their creative perspectives while challenging their audiences to view the world through a new lens

    Neonatal severe bacterial infection impairment estimates in South Asia, sub-Saharan Africa, and Latin America for 2010.

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    BACKGROUND: Survivors of neonatal infections are at risk of neurodevelopmental impairment (NDI), a burden not previously systematically quantified and yet important for program priority setting. Systematic reviews and meta-analyses were undertaken and applied in a three-step compartmental model to estimate NDI cases after severe neonatal bacterial infection in South Asia, sub-Saharan Africa, and Latin America in neonates of >32 wk gestation (or >1,500 g). METHODS: We estimated cases of sepsis, meningitis, pneumonia, or no severe bacterial infection from among estimated cases of possible severe bacterial infection ((pSBI) step 1). We applied respective case fatality risks ((CFRs) step 2) and the NDI risk among survivors (step 3). For neonatal tetanus, incidence estimates were based on the estimated deaths, CFRs, and risk of subsequent NDI. RESULTS: For 2010, we estimated 1.7 million (uncertainty range: 1.1-2.4 million) cases of neonatal sepsis, 200,000 (21,000-350,000) cases of meningitis, 510,000 cases (150,000-930,000) of pneumonia, and 79,000 cases (70,000-930,000) of tetanus in neonates >32 wk gestation (or >1,500 g). Among the survivors, we estimated moderate to severe NDI after neonatal meningitis in 23% (95% confidence interval: 19-26%) of survivors, 18,000 (2,700-35,000) cases, and after neonatal tetanus in 16% (6-27%), 4,700 cases (1,700-8,900). CONCLUSION: Data are lacking for impairment after neonatal sepsis and pneumonia, especially among those of >32 wk gestation. Improved recognition and treatment of pSBI will reduce neonatal mortality. Lack of follow-up data for survivors of severe bacterial infections, particularly sepsis, was striking. Given the high incidence of sepsis, even minor NDI would be of major public health importance. Prevention of neonatal infection, improved case management, and support for children with NDI are all important strategies, currently receiving limited policy attention
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