Results 271 to 280 of about 4,863,941 (314)

The current status of tribological surface science

Tribology Letters, 2001
Use of the ultrahigh vacuum methods of surface science allows the preparation and study of highly characterized solid–solid interfaces for tribological investigations. One of the limiting factors in the progress of our understanding of tribology has been the inability to generate solid–solid interfaces with well-defined, reproducible, atomic scale ...
Gellman, Andrew J, Ko, Jeff S
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Measurement of Surface Currents

Journal of Navigation, 1986
Knowledge of surface currents is of fundamental importance in many diverse marine activities; for example in navigation, offshore engineering and operations, and in the prediction and monitoring of the movement of pollutants. In those areas of scientific research directed towards improved understanding of climate, and towards the modelling and ...
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Ocean surface currents mapped by radar

Proceedings of the 1978 IEEE First Working Conference on Current Measurement, 2005
A high-frequency radar remote-sensing system for measuring and mapping near-surface ocean currents in coastal waters has been analyzed and described. A transportable prototype version of the system was designed, constructed, and tested. With two units operating tens of kilometers apart, the currents were mapped in near real time at a grid of points 3 ...
D E, Barrick, M W, Evans, B L, Weber
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On the origin of the ‘surface current’ in turbulent free-surface flows

Journal of Fluid Mechanics, 1997
In this study, the interaction with a free surface of an initially axisymmetric jet issuing beneath and parallel to the surface was examined. The purpose was to determine the origin of the ‘surface current’ – the large outward velocity which exists in a thin layer adjacent to the surface.
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Tunneling Current Between Two Nonplanar Surfaces

Physical Review B, 1988
The problem of determining the tunneling current between two electrodes that are nonplanar is essential to the theory of Scanning Tunneling Microscopy (S.T.M.) [1’10]. J. Tersoff and D. R. Hamann have shown that for a spherical tip as one electrode, and including only an evanescent s wave function, the current is proportional to the local density of ...
, Sacks, , Gauthier, , Rousset, , Klein
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Surface Diffusion Currents and the Universality Classes of Growth

Physical Review Letters, 1993
We show, through simulations of a variety of one- and two-dimensional solid-on-solid models, that nonequilibrium surface diffusion processes in the presence of a deposition flux are generically characterized by a nonvanishing inclination-dependent mass current along the surface.
, Krug, , Plischke, , Siegert
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Magnetic field of cylindrical surface currents

Proceedings of the IEEE, 1988
Infinite surfaces carrying surface currents with translational symmetry in one direction are considered. When the magnetic field is treated as a bivector quantity rather than an axial vector quantity, its simple relation to the plane visual angle of the surface becomes easy to establish by means of the Biot-Savart law.
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Surface Current Theory

Abstract This chapter deals with the case of a single electron travelling above just one period of a perfectly conducting metallic grating. The charge density distribution induced on the surface is derived and discussed in some detail, and the emitted radiation is attributed to the acceleration of this surface charge distribution.
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MEASUREMENT OF THE SURFACE CURL OF THE SURFACE CURRENT DENSITY

Electromagnetics, 1986
ABSTRACT It is commonplace to measure the surface divergence of the surface current density on a perfectly conducting object. This is related to the surface charge density, or the normal electric field. This paper explores the measurement or a complementary quantity, the surface curl of the surface current density which can be related to an equivalent ...
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CILIARY CURRENTS ON EPENDYMAL SURFACES

Annals of the New York Academy of Sciences, 1966
W C, Worthington, R S, Cathcart
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