49,057 research outputs found
Inflatable stretcher to transport patients
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
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
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
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
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Streaming clumps ejection model and the heterogeneous inner coma of Comet Wild 2
It is modeled that a significant component of the jets of some comets are released as aggregate clumps, which then fragment and shed particles after release, leading to a heterogeneous innermost coma
The Wilson Effective K\"ahler Potential For Supersymmetric Nonlinear Sigma Models
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 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
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
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
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
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