194 research outputs found
Small fuel cell to eliminate pressure caused by gassing in high energy density batteries Progress report, 30 Jun. - 30 Sep. 1965
Miniature fuel cells as proposed solution to gassing and pressure rise problems in sealed silver-zinc batterie
Small fuel cell to eliminate pressure caused by gassing in high energy density batteries Progress report, 30 Sep. - 30 Dec. 1965
Miniature fuel cells to eliminate pressure caused by gassing in sealed silver-zinc batterie
Small fuel cell to eliminate pressure caused by gassing in high energy density batteries Final report, 30 Jun. 1965 - 30 Jun. 1966
Gas pressure reduction in silver-zinc batteries by installing miniature hydrogen-oxygen fuel cel
Small fuel cell to eliminate pressure caused by gassing in high energy density batteries Progress report, 30 Dec. 1965 - 31 Mar. 1966
Miniature fuel cell as pressure regulators in silver-zinc batterie
Inorganic ion exchange membrane fuel cell quarterly progress report, period ending 10 apr. 1965
Inorganic ion exchange membrane for improving mass and heat transfer of fuel cells using palladium and platinum black as catalys
Inorganic ion exchange membranes fuel cell Final report
Inorganic ion exchange membranes fuel cell - development of zirconium phosphate membrane impregnated with catalys
Inorganic ion exchange membrane fuel cell quarterly progress report
Inorganic ion exchange membrane fuel cell - fuel cell performance test
Enhancement of Stochastic Resonance in distributed systems due to a selective coupling
Recent massive numerical simulations have shown that the response of a
"stochastic resonator" is enhanced as a consequence of spatial coupling.
Similar results have been analytically obtained in a reaction-diffusion model,
using "nonequilibrium potential" techniques. We now consider a field-dependent
diffusivity and show that the "selectivity" of the coupling is more efficient
for achieving stochastic-resonance enhancement than its overall value in the
constant-diffusivity case.Comment: 10 pgs (RevTex), 4 figures, submitted to Phys.Rev.Let
Anomalous diffusion associated with nonlinear fractional derivative Fokker-Planck-like equation: Exact time-dependent solutions
We consider the nonlinear Fokker-Planck-like equation with fractional
derivatives . Exact
time-dependent solutions are found for
(). By considering the long-distance {\it asymptotic}
behavior of these solutions, a connection is established, namely
(), with the solutions optimizing
the nonextensive entropy characterized by index . Interestingly enough,
this relation coincides with the one already known for L\'evy-like
superdiffusion (i.e., and ). Finally, for
we obtain which differs from the value
corresponding to the solutions available in the literature (
porous medium equation), thus exhibiting nonuniform convergence.Comment: 3 figure
Stochastic resonance between dissipative structures in a bistable noise-sustained dynamics
We study an extended system that without noise shows a monostable dynamics,
but when submitted to an adequate multiplicative noise, an effective bistable
dynamics arise. The stochastic resonance between the attractors of the
\textit{noise-sustained dynamics} is investigated theoretically in terms of a
two-state approximation. The knowledge of the exact nonequilibrium potential
allows us to obtain the output signal-to-noise ratio. Its maximum is predicted
in the symmetric case for which both attractors have the same nonequilibrium
potential value.Comment: RevTex, 13 pages, 6 figures, accepted in Physical Review
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