All-sky search for gravitational-wave bursts in the second joint LIGO-Virgo run

We present results from a search for gravitational-wave bursts in the data collected by the LIGO and Virgo detectors between July 7, 2009 and October 20, 2010: data are analyzed when at least two of the three LIGO-Virgo detectors are in coincident operation, with a total observation time of 207 days. The analysis searches for transients of duration < 1 s over the frequency band 64-5000 Hz, without other assumptions on the signal waveform, polarization, direction or occurrence time. All identified events are consistent with the expected accidental background. We set frequentist upper limits on the rate of gravitational-wave bursts by combining this search with the previous LIGO-Virgo search on the data collected between November 2005 and October 2007. The upper limit on the rate of strong gravitational-wave bursts at the Earth is 1.3 events per year at 90% confidence. We also present upper limits on source rate density per year and Mpc^3 for sample populations of standard-candle sources. As in the previous joint run, typical sensitivities of the search in terms of the root-sum-squared strain amplitude for these waveforms lie in the range 5 10^-22 Hz^-1/2 to 1 10^-20 Hz^-1/2. The combination of the two joint runs entails the most sensitive all-sky search for generic gravitational-wave bursts and synthesizes the results achieved by the initial generation of interferometric detectors.Comment: 15 pages, 7 figures: data for plots and archived public version at https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=70814&version=19, see also the public announcement at http://www.ligo.org/science/Publication-S6BurstAllSky

Convertible Bonds and Preferred Stocks; an Analysis and Evaluation of Their Role as Capital Raising Instruments.

Ph.D.FinanceUniversity of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/156518/1/0011338.pd

HCN2+ dication spectroscopy: theoretical and experimental investigations

International audienceThe present work combines experimental and theoretical investigations of HCN2+ to investigate the spectroscopy and dissociation dynamics of this dication. Its spectrum is a complex blend of overlapping features, consistent with theoretical calculations showing that the low-lying electronic states of HCN2+ exhibit Renner-Teller and vibronic interactions. The double ionisation spectra are dominated by C-N stretching excitations for all the electronic states investigated. Long-lived HCN2+ ions are observed and are believed to be in low vibrational levels of the X (3)Sigma(-) and/or (1)Delta and/or (1)Sigma(+) electronic states; some have metastable lifetimes of about 25 ns. The formation of H+ + CN+ products is attributed to predissociation by the lowest (3)A" component resulting from a conical intersection between the X(3)Sigma(-) and (3)Pi States. The overall predissociation processes involve vibronic, Renner-Teller and spin-orbit couplings between several electronic states of HCN2+ (C) 2004 Elsevier B.V. All rights reserved

Search for a scalar top quark using the OPAL detector

Contains fulltext : 124482.pdf (preprint version ) (Open Access

Search for heavy charged particles and for particles with anomalous charge in e+-e- collisions at LEP

Contains fulltext : 124552.pdf (preprint version ) (Open Access

Measurement of the τ−→h − h + h − v τ and τ−→h − h + h −≥1π0 v τ branching ratios

Contains fulltext : 124548.pdf (preprint version ) (Open Access