912 research outputs found

    Structure and Volcanic Evolution of the Northern Highland Range, Colorado River Extensional Corridor, Clark County, Nevada

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    A geologic map was drafted of the northern Highland Range (1:24,000 scale), rock units defined, and samples of the volcanic units were obtained and analyzed to produce a representative suite of chemical analyses to characterize the range of geochemical variability. The style, relative timing, and orientation of faults and dikes, and the magnitude and variability of stratal tilting was examined to evaluate the structural and magmatic evolution of the northern Highland Range in the context of models for the Colorado River Extensional Corridor and Black Mountains accommodation zone. Methods involved field mapping of the range scale structure and geometry of faulting, structural interpretation, and geochemical analysis of ten representative samples by X-ray spectrometry. Structural data was interpreted with stereonets; geochemical whole rock, and major elemental data was analyzed by comparing elemental oxides; trace elemental data was analyzed by normalizing to chondrite concentrations. The northern Highland Range is a ca. 3,000 m-thick sequence of volcanic and volcaniclastic flows and breccias overlain by regionally extensive tuffs (Mt. Davis and Bridge Spring). Unique mineralogy, geochemistry and lithologic character of some units and volcanic vent facies, as well as the presence of domes and dikes feeding the extrusives argue for local derivation from a dome/stratocone volcanic complex that was mostly restricted to the northern Highland Range

    Mobile Audience, Social Media, and Action Research: An Examination of Non-Profits and Mobile Engagement

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    Non-profit organizations in the United States are becoming more dependent on the use of social media accounts, to market to their mobile audiences, because they are free to use. With the constant advancements in technology, True Friends marketing department struggles to keep up with the lack of staff and necessary resources. The researchers chose to investigate how True Friends Organization could improve the quality of their mobile engagement through the analysis of their social media and Google analytics accounts. Specifically, the researchers implemented action research to evaluate if the increased use of Instagram expands True Friends mobile audience. The researchers evaluated how technology helps to create unique cultures amongst mobile audiences, as well as why social media as a medium is so important. Participants of this study included True Friends mobile audiences on Google Analytics, Facebook, Twitter, Pinterest, and Instagram. Their mobile audience consists of participants from California, England, Illinois, Iowa, Minnesota, New York, and Wisconsin. The study meticulously focused on social media as a medium for True Friends to communicate with their mobile audience, and how each of their accounts helps to create a distinct culture

    Affordable Housing Need in Scotland, Final Report - September 2015

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    First paragraph: This report presents the findings from research conducted in 2015 which sought to estimate the need for affordable housing across Scotland as a whole. The research was commissioned by Shelter Scotland, the Chartered Institute of Housing Scotland and the Scottish Federation of Housing Associations (SFHA). The study updates a previous, similar exercise conducted almost a decade ago for the Scottish Government (Bramley et al., 2006)

    Moments of Trust: Sibling Responses to the Disclosure of a Sister\u27s Lesbian Identity

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    To better understand the responses of siblings to the disclosure of a sister\u27s lesbian identity, eight pairs of siblings, each consisting of one lesbian participant and one of her siblings, were interviewed. Both lesbian and sibling participants were asked to discuss family relationships before disclosure (coming out), the actual disclosure, sibling reactions, parental reactions, and family relationships since disclosure. Notable results include closeness in sibling relationships and high levels of trust as strong predictors of supportive sibling responses. Siblings were also found to take on the role of confidant and counselor for their parents as they negotiated their daughters\u27 newly-disclosed sexual orientation

    Breaking Down Traditional Classroom Walls and Studying Spacesuits Abroad

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    The spacesuit curriculum under development by the Spacesuit Utilization of Innovative Technology Laboratory (S.U.I.T. Lab) in the Spaceflight Operations program of the Applied Aviation Sciences Department at Embry-Riddle Aeronautical University has the unique challenge of educating non-engineering students about extremely technical space systems, highlighted by spacesuits. CSO 399: “Spacesuits and Human Spaceflight Operations” course, taught in Greece each summer, introduces students to human spaceflight topics. This unique offering takes advantage of the clear water visibility in the Aegean Sea with practical underwater demonstrations of space operations. Students live in confined quarters on a sailboat for two weeks to simulate operations in a close-quarter space station, emulating astronaut living experiences. Hiking Mount Astráka in the Zagori region of Greece created an immersed environment to learn about spacewalk preparations for extravehicular activities. This course is innovative by taking students outside of the classroom to do hands-on, or gloveson, learning. Students taking this course have a drive to obtain a career in the spaceflight industry. By taking this course, students developed an understanding of the design process of human-rated spacecraft and spacesuits required to aid humans in exploring the cosmos. Nontraditional learning was reinforced by the uniqueness of the program teaching “anywhere but a classroom and included locales such as an amphitheater on the beach, catacombs, monasteries, a church courtyard, and as micro-lessons along the way, on sailboats, buses, hotels, and underwater. By changing the locations and having students constantly adapt to new learning environments they were able to grasp a feel for the constant changing pace of the space industry and the thrill of exploration

    Evaluation of Iron Deficiency Anemia in a Pediatric Clinic in the Dominican Republic

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    BackgroundIron deficiency and iron deficiency anemia affect billions of people worldwide. Infants and young children are the most vulnerable. The Niños Primeros en Salud pediatric clinic aims to follow the American Academy of Pediatrics (AAP) recommendation to screen all children at 12 months of age, a vital period for development and the time of greatest risk.ObjectivesTo evaluate the clinic's performance screening for, diagnosing, and treating iron deficiency anemia; and to describe the prevalence and severity of anemia in infants and children attending a perirural clinic in the Dominican Republic.MethodsA total of 293 charts were reviewed for hemoglobin tests performed between 9 and 15 months of age. If a hemoglobin screening was performed, then sociodemographic characteristics, medical history, and laboratory data were collected. If blood tests revealed anemia, then the presence or absence of documented anemia diagnosis as well as the presence or absence of documented provision of iron therapy were recorded.FindingsLess than one-third (87, 29.7%) of patients had a documented hemoglobin test performed in this age range. Of these, 89.6% indicated anemia and nearly half (48.6%) revealed moderate anemia. One-third (34%) of hemoglobin results revealing anemia were not accompanied by a documented diagnosis. The vast majority (86.5%) of results indicated microcytosis, yet just more than half (50.8%) of anemic patients received iron therapy.ConclusionsMany children at the clinic were not screened for iron deficiency anemia during the period of highest risk. In the participants screened, iron deficiency anemia was underdiagnosed and often untreated. Anemia is a significant burden in this community—one demanding reliable screening and universal supplementation

    Economic Damages of Wild Pigs in Non-Traditional Areas: From the Fairway to the After Life

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    Invasive wild pigs are widely known to cause damage to agricultural properties and commodities, but less has been reported about damages to other types of property. A survey was distributed to golf courses and cemeteries across Texas to explore the extent of damage these properties experience. While both property types reported significant damages, golf courses were found to experience more damage than cemeteries. Using average reported costs and predicted county-level damage, total costs for all golf courses and cemeteries across the state were estimated to exceed $1.6 million USD per year

    Stochastic chemical enrichment in metal-poor systems I. Theory

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    A stochastic model of the chemical enrichment of metal-poor systems by core-collapse (Type II) supernovae is presented, allowing for large-scale mixing of the enriched material by turbulent motions and cloud collisions in the interstellar medium. Infall of pristine material is taken into account by following the evolution of the gas density in the medium. Analytical expressions were derived for the number of stars enriched by a given number of supernovae, as well as for the amount of mass with which the ejected material from a supernova is mixed before being locked up in a subsequently formed star. It is shown that for reasonable values of the gas density (~0.1 cm-3) and of the supernova rate (~0.25 kpc-3 Myr-1) of the Galactic halo, the resulting metallicity distributions of the extreme Population II stars show a distinct cut-off at [Fe/H] ~= -4. In fact, by assuming no low-mass Population III stars were able to form out of the primordial interstellar medium, the derived fraction of stars below [Fe/H] = -4 is in agreement with observations. Moreover, the probability is high that even the most metal-poor stars observed to date have been enriched by several contributing supernovae. This partly explains the relatively small star-to-star scatter in many chemical-abundance ratios for stars down to [Fe/H] = -4, as recently found in several observational studies. Contribution from the thermonuclear (Type Ia) supernovae is found to be negligible over almost the entire extremely metal-poor regime. (***abridged***)Comment: 15 pages, 10 figures, accepted for publication in Astronomy & Astrophysic
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