6,332 research outputs found

    JAWS multiple Doppler derived winds

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    An elementary working knowledge is given of the advantages and limitations of the multiple Doppler radar analyses that have recently become available from the Joint Airport Weather Studies (JAWS) project. What Doppler radar is and what it does is addressed and the way Doppler radars were used in the JAWS project to gather wind shear data is described. The working definition of wind shear used is winds that affect aircraft flight over a span of 15 to 45 seconds and turbulence is defined as air motion that cause abrupt aircraft motions. The JAWS data current available contain no turbulence data. The concept of multiple Doppler analysis and the geometry of how it works are described, followed by an explanation of how data gathered in radar space are interpolated to a common Cartesian coordinate system and the limitations involved. A discussion is also presented of the analysis grid and how it was constructed. What the user actually gets is discussed, followed by a discussion of the expected errors in the three orthogonal wind components. Finally, a discussion is presented of why JAWS data are significant

    One Thousand Ceasarean Sections in the Modern Era of Obstetrics

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    Gender differences in psychological factors shaping smoking decisions of Chilean adolescents

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    This study examined gender differences in how internalizing and externalizing symptoms affect adolescents’ decisions about smoking in Chile, where girls smoke at some of the highest rates in the world. In multivariate logistic regression analyses with 607 adolescents, internalizing symptoms, such as depressed mood and anxiety, predicted smoking among girls more than boys, with girls who were low in internalizing symptoms being more likely to smoke than those who were high in internalizing symptoms. In Chile’s high-risk context, internalizing symptoms may be indirectly protective for girls by decreasing their exposure to peer pressure and related influences that encourage cigarette use.The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study was funded by the U.S. National Institute on Drug Abuse (Grant R01-DA-022720). (R01-DA-022720 - U.S. National Institute on Drug Abuse)http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC5014729&blobtype=pdfhttp://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC5014729&blobtype=pdfAccepted manuscrip

    How Do Home Educating Families’ Experiences of Information Literacy Relate to Existing Models?

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    In this paper the researcher discusses the findings of a small research project which explored the information literacy experiences of five home educating families and shows how these findings can be related t o existing research on information literacy. The research was constructivist with a grounded approach to data analysis and involved in-depth inte rviews with family groups. This paper suggests that models of information literacy tha t focus on the situated and the transformative have resonance for the experiences of home educating families

    Using Wind To Power a Groundwater Circulation Well—Preliminary Results

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    In areas of the country where the U.S. Department of Energy has classified the available wind resources as Class 3 or greater, the use of wind turbines to provide power to relatively small remediation systems such as groundwater circulation wells may be technically and economically feasible. Groundwater circulation wells are a good candidate technology to couple with renewable energy, because the remediation system removes contamination from the subject aquifer with no net loss of the groundwater resource, while the wind turbine does not create potentially harmful air emissions. Wind data collected in the vicinity of the former Nebraska Ordnance Plant Superfund site were used to select a wind turbine system to provide a portion of the energy necessary to power a groundwater circulation well located in an area of high trichloroethylene groundwater contamination. Because utility power was already installed at the remediation system, a 10 kW grid inter-tie wind turbine system supplements the utility system without requiring batteries for energy storage. The historical data from the site indicate that the quantity of energy purchased correlates poorly with the quantity of groundwater treated. Preliminary data from the wind turbine system indicate that the wind turbine provides more energy than the remediation system treatment components and the well submersible pump require on a monthly average. The preliminary results indicate that the coupling of wind turbines and groundwater circulation wells may be an attractive alternative in terms of the system operation time, cost savings, and contaminant mass removal

    William Faulkner and the Mithraic Midwife

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    The two parts of William Faulkner’s If I Forget Thee, Jerusalem—“The Wild Palms” and “Old Man”—mirror one another; the second story reflects a more familiar way of illustrating the same theme as the first. Each story emphasizes the other, building the shared theme subversive of traditional gender roles. It is also my feeling that Faulkner inverts Arthurian motifs to tell both stories (especially “The Wild Palms,” though most assume “Old Man” to be the more romantically accessible tale) exactly as Nathaniel Hawthorne did to tell The Scarlet Letter. Hawthorne’s bifurcating of the Grail legend in order to reclaim feminine principles and so regenerate his community (and/or his inherited guilt) must have seemed ideal to Faulkner in his own cause to do the same for the South and his own Sins of the Father
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