Results 291 to 300 of about 365,073 (343)

Thermionic current reversal

Journal of Physics A: Mathematical and General, 2002
Summary: We have analysed the thermionic current over a potential barrier between a hot and a cold metallic wire, in the absence of an externally applied electric field. Because of the quantum nature of the transmission probability and the temperature behaviour of the Fermi distribution function, under proper conditions the thermionic electric current ...
Larsson, Magnus, Antonyuk, Vadim B., Mal'shukov, A. G., Ma, Zhongshui, Chao, K. A.   +4 more
openaire   +2 more sources

Current status of vasectomy reversal

Nature Reviews Urology, 2013
Vasectomy reversal is the most common microsurgical intervention for the treatment of male infertility. Originally introduced in 1977, microsurgical vasectomy reversal has become highly sophisticated and is a minimally invasive, highly efficient and cost-effective treatment option for men with a desire to have children after vasectomy.
J Ullrich, Schwarzer, Heiko, Steinfatt
openaire   +2 more sources

Current techniques in microsurgical reversal surgery

Current Urology Reports, 2005
Microsurgical reversal surgery for the treatment of vasal and epididymal obstruction represents one of the most challenging procedures in urology. An awareness of the latest information surrounding these procedures is essential to success. This article discusses current techniques in preparation, anastomosis, and investigational methods.
Dominick J, Carbone, Joseph J, Phillips
openaire   +2 more sources

Multiple current reversal in Brownian ratchets

Physical Review E, 2001
We address the problem of stationary transport of overdamped Brownian particles in a one-dimensional spatially periodic potential composed of N hills within one period. We show that in a system driven by both thermal equilibrium fluctuations and symmetric dichotomic fluctuations, a proper manipulation of the barrier heights and slopes of the potential ...
M, Kostur, J, Luczka
openaire   +2 more sources

Chronopotentiometry with current reversal effect of unequal forward and reverse current densities

Journal of Electroanalytical Chemistry (1959), 1963
Abstract The theory of current reversal chronopotentiometry has been extended to take into account unequal forward and reverse current densities. Equations have been derived for the potential-time dependence on the current density ratio for reversible and irreversible re-oxidations.
Daniel J. Macero, Larry B. Anderson
openaire   +1 more source

Magnetic diffusion and current profiles during current reversal

Journal of Plasma Physics, 1981
Computer studies are performed on the temporal changes of magnetic flux surfaces and current density profiles in a tokamak (of 25 cm minor radius) undergoing current reversal. The flux on the plasma boundary is forced to vary in time so as to model a total current reversal from positive to negative in about 5 ms.
I. P. Shkarofsky, Magdi Shoucri
openaire   +1 more source

Reverse shoulder arthroplasty current concepts

Orthopaedics and Trauma, 2013
The reverse shoulder arthroplasty (RSA) was introduced in 1987 for cuff tear arthropathy. Over time the prostheses have evolved and its indications have increased. RSA is a semi-constrained reverse ball and socket prosthesis with several key biomechanical advantages, including a fixed centre of rotation which allows the deltoid to function.
Nawfal Al-Hadithy, Adam P. Rumian
openaire   +1 more source