Submitted for the DFD05 Meeting of The American Physical Society Hole Dynamics in Polymer Langmuir Films J. ADIN MANN, JR., JAMES ALEXANDER, Case Western Reserve University, ANDREW BERNOFF, Harvey Mudd College, LU ZOU, ELIZABETH MANN, Kent State University — We develop a model for the closing of a gaseous hole in a liquid domain within a two-dimensional fluid layer, a Langmuir film, coupled to ...

We have performed the first fully three-dimensional general relativistic magnetohydrodynamic (GRMHD) simulation of jet formation from a thin accretion disk around a Schwarzschild black hole with a free-falling corona. The initial simulation results show that a bipolar jet (velocity ∼ 0.3c) is created as shown by previous two-dimensional axisymmetric simulations with mirror symmetry at the equat...

Resistivity and Hall effect measurements on nominally undoped Al0.25Ga0.75N/GaN/AlN heterostructures grown on sapphire substrates prepared by metal organic chemical vapor deposition have been carried out as a function of temperature (20–300 K) and magnetic field (0–1.4 T). Variable magnetic field Hall data have been analyzed using the improved quantitative mobility spectrum analysis technique. ...

The (3 1 1)A and (5 1 1)A planes of GaAs were used for the growth of high-quality two-dimensional hole gas (2DHG) and electron gas (2DEG) structures, respectively. A back-gated, inverted interface, AlGaAs/GaAs structure in which a 2DHG or a 2DEG was embedded was studied. This particular structure enabled the two-dimensional carrier concentration to be varied over two orders of magnitude in a si...

We have performed a fully three-dimensional general relativistic magnetohydrodynamic (GRMHD) simulation of jet formation from a thin accretion disk around a Schwarzschild black hole with a free-falling corona. The initial simulation results show that a bipolar jet (velocity ∼ 0.3c) is created as shown by previous two-dimensional axisymmetric simulations with mirror symmetry at the equator. The ...

Black holes of mass M must have a spin angular momentum S below the Kerr limit ( S=M 1), but whether astrophysical black holes can attain this limiting spin depends on their accretion history. Gas accretion from a thin disk limits the black-hole spin to gas & 0:9980 0:0002, as electromagnetic radiation from this disk with retrograde angular momentum is preferentially absorbed by the black hole....

Recently a method has been developed for relating four dimensional Schwarzschild black holes in M-theory to near-extremal black holes in string theory with four charges, using suitably defined “boosts” and T-dualities. We show that this method can be extended to obtain the emission rate of low energy massless scalars for the four dimensional Schwarzschild hole from the microscopic picture of ra...

The formation of quasar black holes during the hydrodynamic collapse of protogalactic gas clouds is discussed. The dissipational collapse and long-term dynamical evolution of these systems is analysed using three-dimensional numerical simulations. The calculations focus on the nal collapse stages of the inner baryonic component and therefore ignore the presence of dark matter. Two types of init...

We report two cases of surgical removal of a retained subfoveal perfluorocarbon liquid (PFCL) bubble through a therapeutic macular hole combined with intravitreal PFCL injection and gas tamponade. Two patients underwent pars plana vitrectomy with PFCL injection for rhegmatogenous retinal detachment. In both cases, a retained subfoveal PFCL bubble was noticed postoperatively by funduscopy and op...