Results 241 to 250 of about 1,534,656 (293)
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Metabolic Energy Cost of Action Potential Velocity
Journal of Neurophysiology, 2006The action potential of the unmyelinated nerve is metabolically expensive. Using the energetic cost per unit length for the biophysically modeled action potential of the squid giant axon, we analyze this cost and identify one possible optimization. The energetic cost arising from an action potential is divided into three separate components: 1) the ...
Patrick, Crotty +2 more
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On Integrable Hamiltonians with Velocity Dependent Potentials
Celestial Mechanics and Dynamical Astronomy, 2004The author considers two-dimensional Hamiltonian systems with generalized Hamiltonian function (with velocity-dependent potentials). The purpose is to reinvestigate such systems trying to identify those admitting the existence of a polynomial in the momenta which is an independent second invariant both at arbitrary and fixed values of the known first ...
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Downwash-velocity potential method for oscillating surfaces.
AIAA Journal, 1973The application of the downwash-velocity potential method to the case of oscillating surfaces is developed, and calculated forces are given on rectangular airfoils of aspect ratio two rotating about midchord in subsonic flows. These are compared with other results published in the literature for reduced frequencies up to nine-tenths, and for Mach ...
Haviland, John Kenneth, Yoo, Young Sik
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Somatosensory-evoked potentials and perception of skin velocity
Archiv f�r Psychiatrie und Nervenkrankheiten, 1980Mechanical ramp indentations of constant amplitude and randomized velocities to the finger tip of human subjects were used to adequately stimulate the rapidly adapting Meissner corpuscles. The somatosensory-evoked potentials and the subjects' estimations were simultaneously recorded and analyzed off-line. The magnitude of perception showed a nonlinear,
D, Johnson, R, Jürgens, H H, Kornhuber
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Influence of intracellular potential and conduction velocity on extracellular muscle fibre potential
Journal of Electromyography and Kinesiology, 1993The influence of alterations in intracellular action potential (ICAP) duration and in muscle fibre conduction velocity (CV) on the extracellular action potential (ECAP) duration was studied. The experiments were carried out on frog isolated skeletal muscle fibres.
N I, Radicheva, V B, Kolev, N E, Peneva
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The Stream Function and the Velocity Potential Function
The Mathematical Gazette, 1954The stream function, ψ, is a function specially suited for dealing with two-dimensional flow while the velocity potential, ϕ, is a function which may be used with either two- or three-dimensional flow. In two-dimensional flow, the chief utility of ψ and ϕ occurs when they satisfy Laplace's equation ∇
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Analytical Solutions for Velocity-Dependent Nuclear Potentials
Physical Review, 1962The two-nucleon potential, with the necessary invariance requirements, is assumed to be a quadratic function of momentum: $v=\ensuremath{-}{V}_{0}{J}_{1}(r)\ensuremath{-}(\frac{\ensuremath{\lambda}}{M}) \mathrm{p}\ifmmode\cdot\else\textperiodcentered\fi{}{J}_{2}(r)\mathrm{p}$, where ${J}_{1}(r)$ and ${J}_{2}(r)$ are two short-range functions.
Razavy, M., Field, G., Levinger, J. S.
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Elastic-wave velocities and liquefaction potential
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1984Abstract Cyclic triaxial liquefaction tests are used to establish a direct relationship between liquefaction resistance and shear- or compressive-wave velocities in saturated sand. Transducers for generating and receiving elastic waves have been built into the end caps of a triaxial specimen, producing a 3500-Hz shear wave and a 150-kHz ...
PD Alba +4 more
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Tunneling and group velocity in the square potential barrier
Physical Review A, 1992Extending the results obtained in previous papers, an ansymptotic analysis is applied to the problem of the penetration of the penetration of a square potential barrier; analogous to the usual velocity and determining the traversal ...
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Displacement and Velocity Potentials
2001The projected Newton-Euler equations (3.76) from Chapter 3 do not yet provide a complete description of the dynamics of the multibody system, because some force laws connecting the external forces f with the system’s state (q, u) are still missing. The topic of this chapter is thus to introduce a certain class of force laws, broad enough to cover most ...
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