1,025,261 research outputs found

    Implementation of the FAA research and development electromagnetic database

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    The Idaho National Engineering Laboratory (INEL) has been assisting the FAA in developing a database of information about lightning. The FAA Research and Development Electromagnetic Database (FRED) will ultimately contain data from a variety of airborne and ground-based lightning research projects. An outline of the data currently available in FRED is presented. The data sources which the FAA intends to incorporate into FRED are listed. In addition, it describes how the researchers may access and use the FRED menu system

    Fred Zacharias’s Skeptical Moralism

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    Fred Zacharias\u27s articles, Rethinking Confidentiality, published in two parts, were a sensational start to an illustrious career. Fred conducted the first and one of the best empirical studies of confidentiality in years, surveying lawyers and clients in Tompkins County, New York, about what lawyers actually told clients about confidentiality and its exceptions, and what difference the exceptions made in whether clients withheld information from their lawyers

    My Systems Thinking Before and After a Year of Social Systems Sciences

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    The paper reflects on the following three systems thinking books: Fred E. Emery & E L Trist. Towards a Social Ecology, Plenum Press, New York, 1973: Due to many references both personal and in print made to Eric Trist, and, to a lesser degree, Fred Emery, I wanted to familiarize myself with their work. Russell L. Ackoff & Fred E. Emery. On Purposeful Systems, Intersystems, Seaside CA, 1972: I had wanted to read it since having sat in on several sessions of your course in behavioral variables last spring. Russell L. Ackoff. Creating the Corporate Future, J. Wiley & Sons, New York, 1983: Assigned for the course. I went ahead to read the whole thing in order to get started on our interactive design project, and also to do my own personal idealized design

    Book Review: Beyond Orientalism

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    A review of Beyond Orientalism by Fred Dallmayr

    The N2D+/N2H+ ratio as an evolutionary tracer of Class 0 protostars

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    Deuterated ions are abundant in cold (T=10 K), dense (n=10^5 cm^-3) regions, in which CO is frozen out onto dust grains. In such environments, the deuterium fractionation of such ions can exceed the elemental abundance ratio of D/H by a factor of 10^4. In this paper we use the deuterium fractionation to investigate the evolutionary state of Class 0 protostars. In a sample of 20 protostellar objects, we found a clear correlation between the N2D+/N2H+ ratio and evolutionary tracers. As expected, the coolest, i.e. the youngest, objects show the largest deuterium fractionation. Furthermore, we find that sources with a high N2D+/N2H+ ratio show clear indication for infall.Comment: 19 pages, 12 figures, accepted by A&

    Combining multiple classifications of chemical structures using consensus clustering

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    Consensus clustering involves combining multiple clusterings of the same set of objects to achieve a single clustering that will, hopefully, provide a better picture of the groupings that are present in a dataset. This Letter reports the use of consensus clustering methods on sets of chemical compounds represented by 2D fingerprints. Experiments with DUD, IDAlert, MDDR and MUV data suggests that consensus methods are unlikely to result in significant improvements in clustering effectiveness as compared to the use of a single clustering method. (C) 2012 Elsevier Ltd. All rights reserved

    Dynamic weight parameter for the Random Early Detection (RED) in TCP networks

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    This paper presents the Weighted Random Early Detection (WTRED) strategy for congestion handling in TCP networks. WTRED provides an adjustable weight parameter to increase the sensitivity of the average queue size in RED gateways to the changes in the actual queue size. This modification, over the original RED proposal, helps gateways minimize the mismatch between average and actual queue sizes in router buffers. WTRED is compared with RED and FRED strategies using the NS-2 simulator. The results suggest that WTRED outperforms RED and FRED. Network performance has been measured using throughput, link utilization, packet loss and delay

    \u3cem\u3eLegacy of Courage: Calgary’s Own 137th Battalion\u3c/em\u3e by Fred Bagley and Dr. H.D. Duncan [Review]

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    Review of Fred Bagley & Dr. Harvey Daniel Duncan, A Legacy of Courage: Calgary\u27s Own 137th Overseas Battalion, CEF. Calgary: Pulp Street Books, 1994

    Phase Transitions in Three-Dimensional Bosonic Systems in Optical Lattices

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    We formulate the Collective Quantum Field Theory for three-dimensional bosonic optical lattices and evaluate its consequences in a mean-field approximation to two collective fields, proposed by Fred Cooper et al. and in a lowest-order Variational Perturbation Theory (VPT). It is shown that present mean-field approximation predicts some essential features of the experimentally observed dependence of the critical temperature on the coupling strength and a second - order quantum phase transition.In contrast to a recent prediction for atomic gases by Fred Cooper et. al., we find no superfluid state with zero condensate fraction.Comment: 21 pages, revtex, 4 figures. In this version the figures have been replaced, and the text extende
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