5,690 research outputs found

    Airspeed And Heading Of Autumnal Migrants Over Hawaii

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    Plain Speaking: The Voices of William Inge

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    This paper was presented at the William Inge Theatre Festival in April, 2011. The Inge Digital collection in KU ScholarWorks contains scholarly conference papers presented at the annual William Inge Theatre Festival, held at Independence Community College, in Independence, KS. The Independence Community College library is the curator of the William Inge Collection, home of over 400 manuscripts by William Inge donated primarily by Inge and his family, as well as press clippings, memorabilia and books

    Mirror, Mirror: The Pairing of Hal Carter and Alan Seymour in Picnic

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    This paper was presented at the William Inge Theatre Festival in April, 2010. The Inge Digital collection in KU ScholarWorks contains scholarly conference papers presented at the annual William Inge Theatre Festival, held at Independence Community College, in Independence, KS. The Independence Community College library is the curator of the William Inge Collection, home of over 400 manuscripts by William Inge donated primarily by Inge and his family, as well as press clippings, memorabilia and books

    How Firm a Foundation: Faith and Practice in the Works of William Inge

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    This paper was presented at the William Inge Theatre Festival in April, 2012. The Inge Digital collection in KU ScholarWorks contains scholarly conference papers presented at the annual William Inge Theatre Festival, held at Independence Community College, in Independence, KS. The Independence Community College library is the curator of the William Inge Collection, home of over 400 manuscripts by William Inge donated primarily by Inge and his family, as well as press clippings, memorabilia and books

    Logistic Knowledge Tracing: A Constrained Framework for Learner Modeling

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    Adaptive learning technology solutions often use a learner model to trace learning and make pedagogical decisions. The present research introduces a formalized methodology for specifying learner models, Logistic Knowledge Tracing (LKT), that consolidates many extant learner modeling methods. The strength of LKT is the specification of a symbolic notation system for alternative logistic regression models that is powerful enough to specify many extant models in the literature and many new models. To demonstrate the generality of LKT, we fit 12 models, some variants of well-known models and some newly devised, to 6 learning technology datasets. The results indicated that no single learner model was best in all cases, further justifying a broad approach that considers multiple learner model features and the learning context. The models presented here avoid student-level fixed parameters to increase generalizability. We also introduce features to stand in for these intercepts. We argue that to be maximally applicable, a learner model needs to adapt to student differences, rather than needing to be pre-parameterized with the level of each student's ability

    Positive engagement through youth work: Working with Roma children and young people in Derby, supporting their wellbeing

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    This article concentrates on the experiences of mainly Slovak and Czech Roma young people and their families who make up the largest population of Roma currently residing in Derby in the UK. It examines the experiences of Roma young people supported by the Multi-Faith Centre at the University of Derby through its outreach organisation Roma Community Care and their partner agencies. The development of a youth work led approach engaging young Roma is designed to enhance the wellbeing of those young people, not just by providing diversionary activities, but also through its holistic support with whole families. The article draws on youth and community studies examining race and ethnicity unpacked through the medium of social identity. It culminates in an assessment of well being of the young people in the case study correlated with the positive engagement of youth work through informal education, examining the experiences of working directly with young people as well as the conceptual frameworks set out herein.University of Derb

    A Contracting, Turbulent, Starless Core in the Serpens Cluster

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    We present combined single-dish and interferometric CS(2--1) and N2H+(1--0) observations of a compact core in the NW region of the Serpens molecular cloud. The core is starless according to observations from optical to millimeter wavelengths and its lines have turbulent widths and ``infall asymmetry''. Line profile modeling indicates supersonic inward motions v_in>0.34 km/s over an extended region L>12000AU. The high infall speed and large extent exceeds the predictions of most thermal ambipolar diffusion models and points to a more dynamical process for core formation. A short (dynamic) timescale, ~1e5 yr=L/v_in, is also suggested by the low N2H+ abundance ~1e-10.Comment: 11 pages including 2 figures. Accepted for publication in the Astrophysical Journal Letter

    Event generator tuning using Bayesian optimization

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    Monte Carlo event generators contain a large number of parameters that must be determined by comparing the output of the generator with experimental data. Generating enough events with a fixed set of parameter values to enable making such a comparison is extremely CPU intensive, which prohibits performing a simple brute-force grid-based tuning of the parameters. Bayesian optimization is a powerful method designed for such black-box tuning applications. In this article, we show that Monte Carlo event generator parameters can be accurately obtained using Bayesian optimization and minimal expert-level physics knowledge. A tune of the PYTHIA 8 event generator using e⁺e⁻ events, where 20 parameters are optimized, can be run on a modern laptop in just two days. Combining the Bayesian optimization approach with expert knowledge should enable producing better tunes in the future, by making it faster and easier to study discrepancies between Monte Carlo and experimental data.United States. Department of Energy (Grant DE-SC0010497)United States. Department of Energy (Grant DE-FG02-94ER40818

    Measurement of the resonant and CP components in B¯0→J/ψπ+π− decays

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    The resonant structure of the reaction B¯0→J/ψπ+π− is studied using data from 3  fb−1 of integrated luminosity collected by the LHCb experiment, one third at 7 TeV center-of-mass energy and the remainder at 8 TeV. The invariant mass of the π+π− pair and three decay angular distributions are used to determine the fractions of the resonant and nonresonant components. Six interfering π+π− states, ρ(770), f0(500), f2(1270), ρ(1450), ω(782) and ρ(1700), are required to give a good description of invariant mass spectra and decay angular distributions. The positive and negative charge parity fractions of each of the resonant final states are determined. The f0(980) meson is not seen and the upper limit on its presence, compared with the observed f0(500) rate, is inconsistent with a model where these scalar mesons are formed from two quarks and two antiquarks (tetraquarks) at the eight standard deviation level. In the qq¯ model, the absolute value of the mixing angle between the f0(980) and the f0(500) scalar mesons is limited to be less than 17° at 90% confidence level.National Science Foundation (U.S.)United States. Dept. of Energ
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