38 research outputs found
Peeping into the SU(2) Gauge Vacuum
We study thermalised configurations of SU(2) gauge fields by cooling. An
analysis of the effect of cooling is presented and global and statistical
information is extracted.Comment: 3 pages, uuencoded compressed postscript file, contribution to LAT 9
Extraorganic Hepatic Artery Aneurysm: Failure of Transcatheter Embolization
Hepatic artery aneurysm (HAA) was diagnosed in a
62-year-old man who was a poor candidate for
surgery because of severe liver cirrhosis and diabetes
mellitus. Two attempts to occlude the HAA by
transcatheter embolization failed because of recanalization
of the aneurysm. Moreover, aneurysmal
dilatation of the superior mesenteric artery and the
left renal artery developed and progressed. Both the
literature and the present case show that an
individual approach to treatment of extraorganic
HAA should be chosen in dependantan location and
anatomy of the lesion
Flux tube dynamics in the dual superconductor
We study plasma oscillations in a flux tube of the dual superconductor model
of 't Hooft and Mandelstam. A magnetic condensate is coupled to an
electromagnetic field by its dual vector potential, and fixed electric charges
set up a flux tube. An electrically charged fluid (a quark plasma) flows in the
tube and screens the fixed charges via plasma oscillations. We investigate both
Type I and Type II superconductors, with plasma frequencies both above and
below the threshold for radiation into the Higgs vacuum. We find strong
radiation of electric flux into the superconductor in all regimes, and argue
that this invalidates the use of the simplest dual superconductor model for
dynamical problems.Comment: 25 pages Revtex with 11 EPS figure
Formation of a stable radical by oxidation of a tetraorganoborate
Herein, we describe the selective formation of a stable neutral spiroborate radical by one-electron oxidation of the corresponding tetraorganoborate salt Li[B(C4Ph4)2], formally containing a tetrahedral borate center and a s-cis-butadiene radical cation as the spin-bearing site. Spectroscopic and computational methods have been used to determine the spin distribution and the chromism observed in the solid state