539 research outputs found
On the classification and properties of noncommutative duplicates
We give an explicit description of the set of all factorization structures,
or twisting maps, existing between the algebras k^2 and k^2, and classify the
resulting algebras up to isomorphism. In the process we relate several
different approaches formerly taken to deal with this problem, filling a gap
that appeared in a recent paper by Cibils. We also provide a counterexample to
a result concerning the Hochschild (co)homology appeared in a paper by J.A.
Guccione and J.J. Guccione.Comment: 11 pages, no figure
A CORRELATED STUDY OF THE RESPONSE OF A SATELLITE TO ACOUSTIC RADIATION USING STATISTICAL ENERGY ANALYSIS AND ACOUSTIC TEST DATA*
Statistical Energy Analysis (SEA) is an accepted technique for computational modeling of high flequency structural response under vibroacoustic excitation. An SEA study was recently completed for a small satellite project for which Sandia National Laboratories is the system integrator. Since response data were available from an acoustic test of the satellite, we were able to both refine the model and judge the accuracy of the final "best effort" prediction
Freeze-out configuration properties in the 197Au + 197Au reaction at 23 AMeV
Data from the experiment on the 197Au + 197Au reaction at 23 AMeV are
analyzed with an aim to find signatures of exotic nuclear configurations such
as toroid-shaped objects. The experimental data are compared with predictions
of the ETNA code dedicated to look for such configurations and with the QMD
model. A novel criterion of selecting events possibly resulting from the
formation of exotic freeze-out configurations, "the efficiency factor", is
tested. Comparison between experimental data and model predictions may indicate
for the formation of flat/toroidal nuclear systems
The InKiIsSy experiment at LNS: A study of size vs. isospin effects with 124Xe + 64Zn,64Ni reactions at 35 A MeV
In previous experiments, performed by CHIMERA Collaboration, a strong difference in the cross sections of “dynamical” PLF binary decay between neutron-poor 112Sn(35A MeV)+58Ni and neutron-rich 124Sn(35A MeV)+64Ni colliding systems has been reported. The same effect was not seen in the “statistical” binary decay. The observed difference was related to the different N/Z content between the two systems. However, size effects could not be excluded. In order to disentangle Isospin effects from size ones, the systems 124Xe(35A MeV)+64Zn(64Ni) were studied in the InKiIsSy (Inverse Kinematic Isobaric Systems) experiment, carried out at Laboratori Nazionali del Sud on April 2013, using the multi-detector CHIMERA and 4 prototype-modules of FARCOS array. We will report preliminary results on the binary PLF splitting mechanism
MICROMEGAS chambers for hadronic calorimetry at a future linear collider
Prototypes of MICROMEGAS chambers, using bulk technology and analog readout,
with 1x1cm2 readout segmentation have been built and tested. Measurements in
Ar/iC4H10 (95/5) and Ar/CO2 (80/20) are reported. The dependency of the
prototypes gas gain versus pressure, gas temperature and amplification gap
thickness variations has been measured with an 55Fe source and a method for
temperature and pressure correction of data is presented. A stack of four
chambers has been tested in 200GeV/c and 7GeV/c muon and pion beams
respectively. Measurements of response uniformity, detection efficiency and hit
multiplicity are reported. A bulk MICROMEGAS prototype with embedded digital
readout electronics has been assembled and tested. The chamber layout and first
results are presented
Producing valid statistics when legislation, culture, and medical practices differ for births at or before the threshold of survival: Report of a European workshop
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