27 research outputs found

    Aviation Data Mining

    Get PDF
    We explore different methods of data mining in the field of aviation and their effectiveness. The field of aviation is always searching for new ways to improve safety. However, due to the large amounts of aviation data collected daily, parsing through it all by hand would be impossible. Because of this, problems are often found by investigating accidents. With the relatively new field of data mining we are able to parse through an otherwise unmanageable amount of data to find patterns and anomalies that indicate potential incidents before they happen. The data mining methods outlined in this paper include Multiple Kernel Learning algorithms, Hidden Markov Models, Hidden Semi-Markov Models, and Natural Language Processing

    Cosmology with a TeV mass GUT Higgs

    Full text link
    The most natural way to break the GUT gauge symmetry is with a Higgs field whose vacuum expectation value is of order 10^{16}\,\mbox{GeV} but whose mass is of order 10210^2 to 10^3\,\mbox{GeV}. This can lead to a cosmological history radically different from what is usually assumed to have occurred between the standard inflationary and nucleosynthesis epochs, which may solve the gravitino and Polonyi/moduli problems in a natural way.Comment: 4 pages, revte

    Finite size and temperature effects in the AF Heisenberg model

    Full text link
    The low temperature and large volume effects in the d=2+1 antiferromagnetic quantum Heisenberg model are dominated by magnon excitations. The leading and next-to-leading corrections are fully controlled by three physical constants, the spin stiffness, the spin wave velocity and the staggered magnetization. Among others, the free energy, the ground state energy, the low lying excitations, staggered magnetization, staggered and uniform susceptibilities are studied here. The special limits of very low temperature and infinite volume are considered also.Comment: 44 pages, LATEX, no figure

    Gravitino constraints on models of neutrino masses and leptogenesis

    Get PDF
    In the supersymmetric extensions of the standard model, neutrino masses and leptogenesis requires existence of new particles. We point out that if these particles with lepton number violating interactions have standard model gauge interactions, then they may not be created after reheating because of the gravitino problem. This will rule out all existing models of neutrino masses and leptogenesis, except the one with right-handed singlet neutrinos.Comment: 12 pages latex file with one postscript figur

    Dark Matter Spikes and Annihilation Radiation from the Galactic Center

    Get PDF
    The annihilation rate of weakly interacting cold dark matter particles at the galactic center could be greatly enhanced by the growth of a density spike around the central supermassive black hole (SBH). Here we discuss the effects of hierarchical mergers on the central spike. Mergers between halos containing SBHs lead to the formation of SBH binaries which transfer energy to the dark matter particles, lowering their density. The predicted flux of annihiliation photons from the galactic center is several orders of magnitude smaller than in models that ignore the effects of SBHs and mergers. Measurement of the annihilation radiation could in principle be used to constrain the merger history of the galaxy.Comment: 4 pages, 3 postscript figures, uses revtex4.st

    Saturation Vapor Pressures and Transition Enthalpies of Low-Volatility Organic Molecules of Atmospheric Relevance: From Dicarboxylic Acids to Complex Mixtures

    Full text link

    The essential role of senior care pharmacists in antimicrobial stewardship: An updated position statement on behalf of the American Society of Consultant Pharmacists and the Society of Infectious Diseases Pharmacists

    No full text
    Senior care pharmacists are well-positioned to lead and drive antimicrobial stewardship (AMS) initiatives, not only through audit and data collection, but also through communication, collaboration, and cooperation with prescribers and nurses to influence prescribing behaviors. Senior care pharmacists are in a unique position to take a leadership role within the interprofessional team to achieve AMS goals. They should engage with the interprofessional team to promote the judicious and appropriate use of antimicrobials at their practice sites. This position statement is an update of the 2017 version by the American Society of Consultant Pharmacists (ASCP) Antimicrobial Stewardship and Infection and Prevention Control Committee and the Society of Infectious Diseases Pharmacists (SIDP)
    corecore