Results 151 to 160 of about 196 (190)
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Chaos: An Interdisciplinary Journal of Nonlinear Science, 1998
We have experimentally applied some concepts of “force-free” motion to micron size particles (latex beads). The coupling of dissipation and local spatial asymmetry of the potential experienced by the beads can put them into motion. The potentials used in these experiments are of dielectrophoretic nature.
Gorre-Talini, L. +2 more
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We have experimentally applied some concepts of “force-free” motion to micron size particles (latex beads). The coupling of dissipation and local spatial asymmetry of the potential experienced by the beads can put them into motion. The potentials used in these experiments are of dielectrophoretic nature.
Gorre-Talini, L. +2 more
openaire +4 more sources
The Leverage Ratchet Effect [PDF]
SSRN Electronic Journal, 2013 ABSTRACTFirms’ inability to commit to future funding choices has profound consequences for capital structure dynamics. With debt in place, shareholders pervasively resist leverage reductions no matter how much such reductions may enhance firm value. Shareholders would instead choose to increase leverage even if the new debt is junior and would reduce ...
Anat R. Admati +3 more
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Symmetry of deterministic ratchets
Physical Review E, 2019We consider the overdamped motion of a Brownian particle in an unbiased force field described by a periodic function of coordinate and time. A compact analytical representation has been obtained for the average particle velocity as a series in the inverse friction coefficient, from which follows a simple and clear proof of hidden symmetries of ratchets,
V. M. Rozenbaum +3 more
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Journal of Statistical Physics, 1998
While many papers in the last few years have dealt with various equations euphemistically called “ratchets,” the original Feyman two-temperature setup has been left largely unchallenged. We present here a look at the details of how this famous engine actually generates motion from a temperature difference.
Magnasco, Marcelo O. +1 more
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While many papers in the last few years have dealt with various equations euphemistically called “ratchets,” the original Feyman two-temperature setup has been left largely unchallenged. We present here a look at the details of how this famous engine actually generates motion from a temperature difference.
Magnasco, Marcelo O. +1 more
openaire +1 more source
Experimental Tunneling Ratchets
Science, 1999Adiabatically rocked electron ratchets, defined by quantum confinement in semiconductor heterostructures, were experimentally studied in a regime where tunneling contributed to the particle flow. The rocking-induced electron flow reverses direction as a function of temperature.
, Linke +6 more
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Deterministic transport in ratchets
Physical Review E, 1999We present the deterministic transport properties of driven overdamped particles in a simple piecewise-linear ratchet potential. We consider the effects on the stationary current due to local spatial asymmetry, time asymmetry in the driving force, and we include the possibility of a global spatial asymmetry.
A, Sarmiento, H, Larralde
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Diffusion in discrete ratchets
Physical Review E, 1999The phenomenon of noise-induced transport in ratchet devices offers an explanation for directed motion on the molecular scale observed in many biological systems. Net transport through a series of discrete states, occurring in cyclic processes or reactions, can be related to widely investigated continuous ratchet models in the context of thermally ...
J A, Freund, L, Schimansky-Geier
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A molecular information ratchet
Nature, 2007Motor proteins and other biological machines are highly efficient at converting energy into directed motion and driving chemical systems away from thermodynamic equilibrium. But even though these biological structures have inspired the design of many molecules that mimic aspects of their behaviour, artificial nanomachine systems operate almost ...
Viviana, Serreli +3 more
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The flow of a reversible ratchet
Computer Physics Communications, 2011zbMATH Open Web Interface contents unavailable due to conflicting licenses.
J. L. Huang, H. J. Chen, H. C. Tseng
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