2,923 research outputs found
Resonance induced by repulsive interactions in a model of globally-coupled bistable systems
We show the existence of a competition-induced resonance effect for a generic
globally coupled bistable system. In particular, we demonstrate that the
response of the macroscopic variable to an external signal is optimal for a
particular proportion of repulsive links. Furthermore, we show that a resonance
also occurs for other system parameters, like the coupling strength and the
number of elements. We relate this resonance to the appearance of a multistable
region, and we predict the location of the resonance peaks, by a simple
spectral analysis of the Laplacian matrix
The Quantum Stress-Tensor in Self-Similar Spherical Dust Collapse
We calculate the quantum stress tensor for a massless scalar field in the 2-d
self-similar spherical dust collapse model which admits a naked singularity. We
find that the outgoing radiation flux diverges on the Cauchy horizon. This may
have two consequences. The resultant back reaction may prevent the naked
singularity from forming, thus preserving cosmic censorship through quantum
effects. The divergent flux may lead to an observable signature differentiating
naked singularities from black holes in astrophysical observations.Comment: Latex File, 19 page
EP-1097: Comparison of outcomes and toxicities between IMRT and SIB-IMRT in cancers of hypopharynx
The use of dynamic MRI to investigate post radiotherapy dysphagia: A proof of principle study
Switching of +/-360deg domain wall states in a nanoring by an azimuthal Oersted field
We demonstrate magnetic switching between two domain wall vortex
states in cobalt nanorings, which are candidate magnetic states for robust and
low power MRAM devices. These domain wall (DW) or "twisted onion"
states can have clockwise or counterclockwise circulation, the two states for
data storage. Reliable switching between the states is necessary for any
realistic device. We accomplish this switching by applying a circular Oersted
field created by passing current through a metal atomic force microscope tip
placed at the center of the ring. After initializing in an onion state, we
rotate the DWs to one side of the ring by passing a current through the center,
and can switch between the two twisted states by reversing the current, causing
the DWs to split and meet again on the opposite side of the ring. A larger
current will annihilate the DWs and create a perfect vortex state in the rings.Comment: 5 pages, 5 figure
Triamcinolone Intravitreal Injection Results in Previously Vitrectomized Eyes: Longer Effect than We Expected?
Rate adaptation for wireless video streaming based on error statistics
This paper presents a new rate-control algorithm for live video streaming over wireless IP networks, which is based on selective frame discarding. In the proposed mechanism excess 'P' frames are dropped from the output queue at the sender using a congestion estimate based on packet loss statistics obtained from RTCP feedback and from the Data Link (DL) layer. The performance of the algorithm is evaluated through computer simulation. This paper also presents a characterisation of packet losses owing to transmission errors and congestion, which can help in choosing appropriate strategies to maximise the video quality experienced by the end user. Copyright © 2007 Inderscience Enterprises Ltd
The effect of feed supplementation with inulin on boar taint levels and meat quality of entire male pigs
Received: March 19th, 2022 ; Accepted: May 3rd, 2022 ; Published: July 5th, 2022 ; Correspondence: [email protected] and androstenone are the two main compounds responsible for the foul odour
in entire male pigs’ meat, known as boar taint. This study evaluated the effect of feed
supplementation with inulin on the boar taint levels of 30 entire male pigs. Two months before
slaughter, the animals were allocated into three groups (n = 10). The control group received a
standard commercial diet. The other groups were fed the same commercial diet with 3% and 6%
added inulin, respectively. Results showed that inulin addition to the feed significantly reduced
skatole levels in the pigs’ adipose tissue compared with the control group. The levels of
androstenone were not affected by the dietary approach. Although there were differences in some
parameters, the supplementation with inulin did not promote extensive changes in the meat
quality parameters between the tested groups. When raising entire males, supplementation with
inulin in finishing diets could be considered to reduce the boar taint perception by the consumer
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