663 research outputs found
383 KNEE JOINT SHAPE ASSESSED BY ACTIVE SHAPE MODELLING OF PLAIN RADIOGRAPHS IS RELATED TO OSTEOARTHRITIS SEVERITY
Candidates for a possible third-generation gravitational wave detector: comparison of ring-Sagnac and sloshing-Sagnac speedmeter interferometers
Speedmeters are known to be quantum non-demolition devices and, by potentially providing sensitivity beyond the standard quantum limit, become interesting for third generation gravitational wave detectors. Here we introduce a new configuration, the sloshing-Sagnac interferometer, and compare it to the more established ring-Sagnac interferometer. The sloshing-Sagnac interferometer is designed to provide improved quantum noise limited sensitivity and lower coating thermal noise than standard position meter interferometers employed in current gravitational wave detectors. We compare the quantum noise limited sensitivity of the ring-Sagnac and the sloshing-Sagnac interferometers, in the frequency range, from 5 Hz to 100 Hz, where they provide the greatest potential benefit. We evaluate the improvement in terms of the unweighted noise reduction below the standard quantum limit, and by finding the range up to which binary black hole inspirals may be observed. The sloshing-Sagnac was found to give approximately similar or better sensitivity than the ring-Sagnac in all cases. We also show that by eliminating the requirement for maximally-reflecting cavity end mirrors with correspondingly-thick multi-layer coatings, coating noise can be reduced by a factor of approximately 2.2 compared to conventional interferometers
Examining the cancellation mechanism of neutron EDM in a model with dilaton-dominated susy breaking
We examine the cancellation mechanism between the different contributions to
the electric dipole moment of the neutron in a model with dilaton-dominated
SUSY breaking. We find these accidental cancellations occur at few points in
parameter space. For a wide region of this space we must constrain the phase of
to be of order and have the phases of and strongly
correlated in order to have small neutron EDM. Moreover, we consider the
indirect CP violation parameter in this region where the electric
dipole moment is less than the experimental limit and find that we can generate
of order
QCD Corrections to Neutron Electric Dipole Moment from Dimension-six Four-Quark Operators
In this paper, the renormalization-group equations for the
(flavor-conserving) CP-violating interaction are derived up to the dimension
six, including all the four-quark operators, at one-loop level. We apply them
to the models with the neutral scalar boson or the color-octet scalar boson
which have CP-violating Yukawa interactions with quarks, and discuss the
neutron electric dipole moment in these models.Comment: 14 pages, 8 eps files; published in Physics Letter
The Strong CP Problem and Axions
I describe how the QCD vacuum structure, necessary to resolve the
problem, predicts the presence of a P, T and CP violating term proportional to
the vacuum angle . To agree with experimental bounds, however,
this parameter must be very small ). After briefly
discussing some possible other solutions to this, so-called, strong CP problem,
I concentrate on the chiral solution proposed by Peccei and Quinn which has
associated with it a light pseudoscalar particle, the axion. I discuss in
detail the properties and dynamics of axions, focusing particularly on
invisible axion models where axions are very light, very weakly coupled and
very long-lived. Astrophysical and cosmological bounds on invisible axions are
also briefly touched upon.Comment: 14 pages, to appear in the Lecture Notes in Physics volume on Axions,
(Springer Verlag
A framework for the integrated assessment of social and economic values associated with man-made marine structures
Man-made marine structures (MMS) are increasingly prevalent in the marine environment, reflecting the growth and diversity of economic and recreational activities in both onshore and offshore settings. The presence of MMS presents opportunities and conflicts for marine planners, particularly in relation to reconciling competing stakeholder interests arising from their placement and long-term fate, including decommissioning and/or removal. This necessitates the development of an integrated framework which encapsulates the complexity of social and economic values and perceptions held by differing stakeholders. Through research conducted with MMS stakeholders in Australia, we present the first framework of this type which identifies three principal categories of socio-economic values and explores the inter-relationships between these groupings. The research further underlines the pivotal significance of rules and norms which impact across all three categories. These findings will assist planners in understanding the preferences of relevant marine stakeholders in order to enhance benefits and minimise conflicts related to MMS
Homocysteine in dogs with systemic inflammatory response syndrome
OBJECTIVES - To compare serum concentrations of homocysteine (Hcy) in dogs fitting
the criteria for the systemic inflammatory response syndrome (SIRS) and healthy dogs,
and compare these values to commonly measured B-vitamins.
METHODS – Study dogs were classified into noninfectious SIRS or sepsis groups and
blood was drawn on Day 1 of the patient’s hospitalization for the measurement of Hcy,
folate and cobalamin concentrations. Hcy was measured in 51 clinically normal dogs to
serve as the control group.
RESULTS - A statistically significant difference was found between the Hcy
concentrations of the healthy group when compared to noninfectious SIRS and sepsis
groups. Hcy values were not correlated with folate, cobalamin or APPLEfast severity
scores. Hcy concentrations were significantly lower in sick dogs when compared to the
control group, which is dissimilar to the human population.
CLINICAL SIGNIFCANCE - The clinical significance of Hcy changes in critically ill dogs is
currently unknown.http://aac.asm.orghb2014ab201
Loop-Mediated Isothermal Amplification for Influenza A (H5N1) Virus
We describe a 1-step reverse-transcription loop-mediated isothermal amplification assay for detection of highly pathogenic avian influenza A (H5N1) viruses. The assay was tested by using a panel of highly pathogenic H5N1 subtypes isolated over the past 10 years and clinical specimens. The assay produced negative results for all non-H5N1 subtypes
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