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The Geometry of Arc Interruption
Transactions of the American Institute of Electrical Engineers, 1941It is the purpose of this paper to present a rigorous analysis and description of the phenomenon which takes place in an interrupting device during the interval between the parting of the contacts and the current zero at which interruption takes place.
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Geological Society of America Bulletin, 1982
Most variation in geometry and angle of inclination of subducted oceanic lithosphere is caused by four interdependent factors. Combinations of (1) rapid absolute upper-plate motion toward the trench and active overriding of the subducted plate, (2) rapid relative plate convergence, and (3) subduction of intraplate island-seamount chains, aseismic ...
TIMOTHY A. CROSS, REX H. PILGER
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Most variation in geometry and angle of inclination of subducted oceanic lithosphere is caused by four interdependent factors. Combinations of (1) rapid absolute upper-plate motion toward the trench and active overriding of the subducted plate, (2) rapid relative plate convergence, and (3) subduction of intraplate island-seamount chains, aseismic ...
TIMOTHY A. CROSS, REX H. PILGER
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Island-arc and underthrust-plate geometry
Tectonophysics, 1974Abstract Geophysical data describing the geometry of underthrust crustal plates at the island arcs are fitted to the relation for strain-free buckling of a thin spherical shell as given by Frank (1968). Agreement of this relation with the data is notable for extensive arcs of large radius.
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The Geometry of Arc InterruptionߞII Current-Zero Phenomena
Transactions of the American Institute of Electrical Engineers, 1944During the microsecond period in which an interrupter is performing the act of changing from a conductor to an insulator (termed interruption) the current, voltage, and arc resistance undergo variations which materially affect the performance characteristics of the interrupter.
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Optimal codes, n-arcs and Laguerre geometry
Acta Informatica, 1976In this paper we give sharp bounds for the block-length n of optimal linear (n, k)-codes over GF(q).
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IEEE Transactions on Components, Packaging, and Manufacturing Technology: Part A, 1998
Arc motion along arc runners enclosing different opening angles from 60/spl deg/ to 150/spl deg/, symmetrically arranged, was investigated in a model switch at currents from 1 kA to 5 kA. Wall distance, wall and runner material were varied. The measured criteria were the lengthening time and the frequency of back-strikes.
E. Gauster, W. Rieder
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Arc motion along arc runners enclosing different opening angles from 60/spl deg/ to 150/spl deg/, symmetrically arranged, was investigated in a model switch at currents from 1 kA to 5 kA. Wall distance, wall and runner material were varied. The measured criteria were the lengthening time and the frequency of back-strikes.
E. Gauster, W. Rieder
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A novel electrode geometry for high-current vacuum arcs
Journal of Physics D: Applied Physics, 1977A new electrode geometry, the stirrup, utilizes its own magnetic field to maintain a diffuse high-current vacuum arc at the centre of the electrode system. This arc is reproducible and stable, and the voltage is hash-free. High-speed photographs of a high-current vacuum arc are shown, together with arc voltage and current oscillograms and ...
M R Barrault, C R Melbourne, P D Prewett
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Effect of Electrode Geometry on Arc Flash Protection Boundary
IEEE Transactions on Industry Applications, 2019In arc flash hazards calculations, protection boundary can be used to gain insight in personnel protection against thermal injuries. Although IEEE 1584-2002 has provided the calculation guide based on tests with the arcing electrodes in a vertical plane, applications where the traditional vertical arrangement is not directly applicable have been ...
Zhenyuan Zhang +3 more
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Wildhaber—Novikov circular arc gears: geometry and kinematics
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1986An exact analysis of the geometry and kinematics of the Wildhaber—Novikov (W. -N.) system of high-conformity gears is described. The techniques of gear analysis developed by Dyson (1969) are used to obtain the shape of the gap between the gear teeth in contact at zero load.
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Singularities of Birational Geometry via Arcs and Differential Operators
2021We study singularities of algebraic varieties, in particular those arising in birational geometry, from several points of view. The first is that of arc schemes: arc schemes parametrize “infinitesimal curves” on a variety, and their geometry reflects properties of singularities.
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