140 research outputs found
Hadron Correlations and Fluctuations in 40, 80, and 158 AGeV/c Pb-Au Collisions
Measurements of HBT correlations and event-by-event fluctuations of mean pT
and the net charge in Pb-Au collisions at 40, 80, and 158 AGeV/c are presented.
From comparisons of HBT radii measured from AGS to RHIC energies, a universal
mean free path of pions at the thermal freeze-out of about 1 fm is derived.
Non-statistical mean pT fluctuations of about 0.7 % are measured, which are
somewhat smaller than fluctuations at RHIC. No indication for the QCD critical
point is observed. Fluctuations of the net charge are reproduced by RQMD and
URQMD models, but significantly larger than prediction in equilibrated QGP.Comment: 4 pages, 3 figures, talk presented at the XXXVIIIth Rencontres de
Moriond, QCD and High Energy Hadronic Interactions, Les Arcs, France, March
22-29, 200
Event-by-Event Fluctuations at 40, 80, and 158 AGeV/c in Pb+Au Collisions
Event-by-event fluctuations of mean pt and net charge in 40, 80, and 158
AGeV/c Pb+Au collisions are presented. The observed dynamical mean pt
fluctuations in central events of about 1 % are very similar to results from
RHIC. The centrality dependence of mean pt fluctuations at 158 AGeV/c shows a
peculiar non-monotonic pattern with respect to the extrapolation from the
fluctuations measured in p+p collisions. Dynamical net charge fluctuations
smaller than the charge conservation limit are observed. After correction for
charge conservation, the measured fluctuation signal in central events is
comparable to RHIC results.Comment: 4 pages, 6 figures, proceedings of the Quark Matter 2004, in Oakland,
USA, to be published in Journal of Physics G: Nuclear and Particle Physic
Locality and diel cycling of viral production revealed by a 24 h time course cross-omics analysis in a coastal region of Japan
International audienceViruses infecting microorganisms are ubiquitous and abundant in the ocean. However, it is unclear when and where the numerous viral particles we observe in the sea are produced and whether they are active. To address these questions, we performed time-series analyses of viral metagenomes and microbial metatranscriptomes collected over a period of 24 h at a Japanese coastal site. Through mapping the metatranscriptomic reads on three sets of viral genomes ((i) 878 contigs of Osaka Bay viromes (OBV), (ii) 1766 environmental viral genomes from marine viromes, and (iii) 2429 reference viral genomes), we revealed that all the local OBV contigs were transcribed in the host fraction. This indicates that the majority of viral populations detected in viromes are active, and suggests that virions are rapidly diluted as a result of diffusion, currents, and mixing. Our data further revealed a peak of cyanophage gene expression in the afternoon/dusk followed by an increase of genomes from their virions at night and less-coherent infectious patterns for viruses putatively infecting various groups of heterotrophs. This suggests that cyanophages drive the diel release of cyanobacteria-derived organic matter into the environment and viruses of heterotrophic bacteria might have adapted to the population-specific life cycles of hosts
Resuscitation from Cardiac Arrest, Occuring During Cardiac Catheterisation : A
This is the report of a case of successful cardiac resuscitation following cardiac arrest during cardiac catheterisation, treated with brain cooling, 12 minutes having elapsed between the arrest and initiation of cardiac massage
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