13,381 research outputs found
Pyrogen reaction and conversion of sustained ventricular tachycardia to sinus rhythm: two case reports
INTRODUCTION: Pyrogen reaction is a side effect of intravenous infusion of solution on body; sustained ventricular tachycardia is a serious arrhythmia, no relationship between them has been reported before. CASE PRESENTATION: Two patients with sustained ventricular tachycardia refractory to lidocaine happened to have pyrogen reaction. The sustained ventricular tachycardia was converted to sinus rhythm after the pyrogen reaction. CONCLUSION: The conversion of sustained ventricular tachycardia might be related to pyrogen reaction. The effects of pyrogen reaction on sustained ventricular tachycardia need further research
Associated Production of Fermionic Dark Matter and Neutrino at the Future Lepton Colliders
In light of the fermionic dark matter absorption on electron target that can
be observed by direct detection experiments, we study its complementary
searches at the future colliders such as CEPC, FCC-ee, ILC, and CLIC.
Two typical processes, the mono-photon and electron-positron pair production
associated with missing energy, can serve the purpose. While the mono-photon
search prevails at CEPC, FCC-ee, and ILC, the channel
has more significant contributions at CLIC with much higher collision energy
. The beam polarizations can help further suppressing the SM
backgrounds to enhance the signal significance while differential cross
sections can distinguish the Lorentz structure of various effective operators.
The combined sensitivity can reach well above 1 TeV at CEPC/FCC-ee and ILC
while it further touches 30 TeV at CLIC. Comparing with the updated results
from the dark matter direct detection experiments (XENON1T, PandaX-II,
PandaX-4T, LZ, and XENONnT), astrophysical observations, and
cosmological constraints, the collider searches can not just provide better
sensitivity for light dark matter mass but also scan much wider mass range.Comment: 34pages, 17 captioned figure
Iterative joint source and channel decoding using turbo codes for MPEG-4 video transmission
This thesis presents a novel iterative joint source and channel decoding scheme using turbo codes for MPEG-4 video transmission over noisy channels. The proposed scheme, on one hand, utilizes the channel soft outputs generated by a turbo decoder to assist syntax based error concealment in a source decoder. On the other hand, the residual redundancy extracted by the source decoder is fed back to the channel decoder through modifying the extrinsic information exchanged between the two constituent MAP decoders of the turbo decoder so as to improve the error performance of the turbo decoder. With video packet mixer, the proposed scheme can correct most of the turbo coding blocks with a large number of bit errors. Simulation results show significant improvement in terms of BER, PSNR and the reconstructed video quality
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