Zobrazeno 101 - 110
of 11 484
pro vyhledávání: '"Katz J"'
Autor:
Katz, J. I.
Might a nuclear-armed terrorist group or state use ordinary commerce to deliver a nuclear weapon by smuggling it in a cargo container or vehicle? This delivery method would be the only one available to a sub-state actor, and it might enable a state t
Externí odkaz:
http://arxiv.org/abs/1401.8193
Autor:
Katz, J. I.
Publikováno v:
Phys. Rev. E 89, 021003 (2014)
Concentrated suspensions may shear-thin when the suspended particles form planar sheets that slide over one another with less friction than if the particles are randomly distributed. In a na\"ive model the suspension is described by a mean effective
Externí odkaz:
http://arxiv.org/abs/1309.4069
Autor:
Katz, J. I.
Publikováno v:
Phys. Rev. D 89, 103009 (2014)
The fast (ms) radio bursts reported by Thornton, {\it et al.} have extremely high brightness temperatures if at the inferred cosmological distances. This implies coherent emission by "bunches" of charges. We model the emission region as a screen of d
Externí odkaz:
http://arxiv.org/abs/1309.3538
Autor:
Katz, J. I.
The recently observed antiglitch of AXP 1E 2259+586 is inconsistent with magnetar models, but may be explained as the consequence of sudden accretion of retrograde matter or "propeller" interaction with surrounding matter. AXP/SGR are explained as si
Externí odkaz:
http://arxiv.org/abs/1307.0586
Publikováno v:
Phys. Rev. D 85 124003, 2012
We study gravitational waves to first and second order in amplitude in vacuum asymptotically flat spacetimes. The Einstein equations are solved to first order and these solutions are superposed to form a time-symmetric ingoing and then outgoing pulse
Externí odkaz:
http://arxiv.org/abs/1207.2957
We formulate an effective medium (mean field) theory of a material consisting of randomly distributed nodes connected by straight slender rods, hinged at the nodes. Defining novel wavelength-dependent effective elastic moduli, we calculate both the s
Externí odkaz:
http://arxiv.org/abs/1206.2912
Publikováno v:
Class. Quantum Grav. 29 (2012) 017001
A new formula is given for the fast linear gravitational dragging of the inertial frame within a rapidly accelerated spherical shell of deep potential. The shell is charged and is electrically accelerated by an electric field whose sources are includ
Externí odkaz:
http://arxiv.org/abs/1202.2755
Publikováno v:
Phys. Rev. Lett. 106, 058301 (2011)
Attempts to achieve "top kill" of actively flowing oil wells by insertion of dense drilling "muds", i.e., slurries of dense minerals, from above will fail if the Kelvin-Helmholtz instability in the gravity-driven counterflow produces turbulence that
Externí odkaz:
http://arxiv.org/abs/1008.4595
Autor:
Katz, J. I.
Publikováno v:
Nuclear Science and Engineering 168, 164--171 (2011)
In order to test theories of fission cross-sections, it is desirable to measure the (n,f) cross-sections of both an isomeric state and the ground state of the same isotope of the same element. This would test the ability to calculate effects that dep
Externí odkaz:
http://arxiv.org/abs/1003.4726
Autor:
Katz, J. I.
Publikováno v:
Energy and Environmental Science 3, 1634--1644 (2010)
A "toy" model, simple and elementary enough for an undergraduate class, of the temperature dependence of the greenhouse (mid-IR) absorption by atmospheric water vapor implies a bistable climate system. The stable states are glaciation and warm interg
Externí odkaz:
http://arxiv.org/abs/1002.1672