649 research outputs found

    User's manual for PRESTO: A computer code for the performance of regenerative steam turbine cycles

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    Standard turbine cycles for baseload power plants and cycles with such additional features as process steam extraction and induction and feedwater heating by external heat sources may be modeled. Peaking and high back pressure cycles are also included. The code's methodology is to use the expansion line efficiencies, exhaust loss, leakages, mechanical losses, and generator losses to calculate the heat rate and generator output. A general description of the code is given as well as the instructions for input data preparation. Appended are two complete example cases

    Searching for Millisecond Pulsars: Surveys, Techniques and Prospects

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    Searches for millisecond pulsars (which we here loosely define as those with periods << 20 ms) in the Galactic field have undergone a renaissance in the past five years. New or recently refurbished radio telescopes utilizing cooled receivers and state-of-the art digital data acquisition systems are carrying out surveys of the entire sky at a variety of radio frequencies. Targeted searches for millisecond pulsars in point sources identified by the {\it Fermi} Gamma-ray Space Telescope have proved phenomenally successful, with over 50 discoveries in the past five years. The current sample of millisecond pulsars now numbers almost 200 and, for the first time in 25 years, now outnumbers their counterparts in Galactic globular clusters. While many of these searches are motivated to find pulsars which form part of pulsar timing arrays, a wide variety of interesting systems are now being found. Following a brief overview of the millisecond pulsar phenomenon, we describe these searches and present some of the highlights of the new discoveries in the past decade. We conclude with predictions and prospects for ongoing and future surveys.Comment: 16 pages, 3 figures, accepted for publication in Classical and Quantum gravit

    JOE\u27s Niche in the Extension Scholarship Movement

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    Extension\u27s sustainability is tied to relationships with academia. Now more than ever, Extension faculty and staff need to integrate their work into the aims of their university to gain credibility, relevance, and support. This requires Extension workers to more deeply and widely document and share the scholarship of their work with academics and stakeholders. Extension workers should look more often to the Journal of Extension as the premier Extension journal in North America to help address this need. The journal provides a number of factors and services that contribute to developing and sustaining a culture of Extension scholarship
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