Twisted SUSY Invariant Formulation of Chern-Simons Gauge Theory on a Lattice

We propose a twisted SUSY invariant formulation of Chern-Simons theory on a Euclidean three dimensional lattice. The SUSY algebra to be realized on the lattice is the N=4 D=3 twisted algebra that was recently proposed by D'Adda et al.. In order to keep the manifest anti-hermiticity of the action, we introduce oppositely oriented supercharges. Accordingly, the naive continuum limit of the action formally corresponds to the Landau gauge fixed version of Chern-Simons theory with complex gauge group which was originally proposed by Witten. We also show that the resulting action consists of parity even and odd parts with different coefficients.Comment: 22 pages, 5 figures; v2,v3 added references, v4 added two paragraphs and one figure in the summar

The San Francisco girl : and other rhymes (including some gloom chasers) /

Mode of access: Internet

Microseismic monitoring of hydraulic experiments undertaken during phase IIA of the SOULTZ HDR Project (Alsace, France)

In the framework of the European HDR Project of SOULTZ, co-sponsored by European Community, two 50 hour-hydraulic injections were carried out in the main borehole GPKl. This borehole reached a depth of 2000 m (600 m of granite under a 1400-m-thick sedimentary cover) and a bottom hole temperature of 140 C. both injections tests were made between a packer sited at 1968 m and bottom hole, with injection flow-rates of 7 l/s and 15 l/s. 3-axis accelerometer probes designed to withstand high temperatures up to at least 135 C were installed at the bottom of three boreholes which reached the granite. this network was supplemented by high temperature hydrophone sensors deployed in a fourth borehole (EPSl) at depth of about 2000 m. Data were transmitted to an on-line computer to perform preliminary interpretations. During the tests, 135 and 239 induced microseismic events respectively were recorded. Present results show that seismicity starts off very close to the injection point and spreads out to form a cloud with a North-West to South-East elongation. According to previous interpretations, the direction of the maximum horizontal stress component deduced by BHTV data analysis and hydrofracture in-situ stress measurements led to values of respectively 175 N and 155 N. During the second injection experiment a concentration of seismicity was revealed to the N-W of GPKl. This cloud also shows a trend to grow downwards and no seismicity extends more than 300 m away from the injection interval

Etude experimentale de la fracturation hydraulique en sondage dans un massif calcaire et de l'emission acoustique associee

SIGLECNRS AR 11836 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc

Prevision des seismes par la methode VAN Mission d'analyse a Thebes (Grece). Rapport final

SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : AR 14218 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc