49,057 research outputs found

    Inflatable stretcher to transport patients

    Get PDF
    Inflatable plastic bag inside strong, inflexible outer bag facilitates emergency transport of seriously burned or disabled patients. When the bag is inflated the patient is completely immobilized and cushioned from external shock. Air for breathing, temperature controls and communications may be provided by appropriate plug-in connections

    Nonlinear backreaction in a quantum mechanical SQUID

    Get PDF
    In this paper we discuss the coupling between a quantum mechanical superconducting quantum interference device (SQUID) and an applied static magnetic field. We demonstrate that the backreaction of a SQUID on the applied field can interfere with the ability to bias the SQUID at values of the static (DC) magnetic flux at, or near to, transitions in the quantum mechanical SQUID.Comment: 9 pages, to be published in Phys. Rev.

    Creating a supersolid in one-dimensional Bose mixtures

    Full text link
    We identify a one-dimensional supersolid phase in a binary mixture of near-hardcore bosons with weak, local inter-species repulsion. We find realistic conditions under which such a phase, defined here as the coexistence of quasi-superfluidity and quasi-charge density wave order, can be produced and observed in finite ultra-cold atom systems in a harmonic trap. Our analysis is based on Luttinger liquid theory supported with numerical calculations using the time-evolving block decimation method. Clear experimental signatures of these two orders can be found, respectively, in time-of-flight interference patterns, and the structure factor S(k) derived from density correlations.Comment: 4 pages, 5 figures, changed Fig. 4, and minor edit

    Guidance and Control in a Josephson Charge Qubit

    Get PDF
    In this paper we propose a control strategy based on a classical guidance law and consider its use for an example system: a Josephson charge qubit. We demonstrate how the guidance law can be used to attain a desired qubit state using the standard qubit control fields.Comment: 9 pages, 5 figure

    The Wilson Effective K\"ahler Potential For Supersymmetric Nonlinear Sigma Models

    Full text link
    Renormalization group methods are used to determine the evolution of the low energy Wilson effective action for supersymmetric nonlinear sigma models in four dimensions. For the case of supersymmetric CP(N1)CP^{(N-1)} models, the K\"ahler potential is determined exactly and is shown to exhibit a nontrivial ultraviolet fixed point in addition to a trivial infrared fixed point. The strong coupling behavior of the theory suggests the possible existence of additional relevant operators or nonperturbative degrees of freedom.Comment: 9 pages, LaTeX, 1 eps figur

    Joint demodulation of low-entropy narrowband cochannel signals

    Get PDF
    Introducation to cochannel signals: many receivers today operate in an interference-limited environment. In a dense signal environment, the performance of a receiver is limited by interference from multiple signals at the receiver rather than signal-to-noise ratio. In the interference-limited environment, there is a diminishing return from investing additional resources into improving traditional receiver parameters such as noise figure. Advanced processing techniques exist that can help recover information that would otherwise be lost using a single-channel receiver. This work investigates some of these techniques. Interference may originate from many sources, such as users on the same or adjacent frequency band, unintended emissions, and intermodulation. This work investigates interference from cochannel information bearing signals. Cochannel interference is commonly defined as the reception of two or more signals at the receiver overlapping in frequency and in time.USA

    Slrtool: a tool to support collaborative systematic literature reviews

    Get PDF
    Systematic Literature Reviews (SLRs) are used in a number of fields to produce unbiased accounts of specific research topics. The SLR process is particularly well documented and regulated in the medical field, where it is accepted as the standard mechanism to assess, for instance, the benefits of drugs and treatments. SLRs and meta-analysis techniques are increasingly being used in other fields as well, from Social Sciences to Software Engineering

    Morone chrysops (Rafinesque): the White Bass in Lake Superior

    Get PDF
    On August 18, 1975, a young-of-the-year white bass, Morone chrysops was beach seined from Lake Superior at Marquette, Michigan. This is the first reported occurrence of the species in Lake Superior or its tributaries since an unverifiable sighting about 1880. Most likely the species has been recently introduced or has migrated through the St. Mary\u27s River from Lake Huron or Lake Michigan
    corecore