Results 211 to 220 of about 295,654 (265)
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Journal of Physics B: Atomic, Molecular and Optical Physics, 1990
Atomic collision experiments using low-energy positron beams have been actively pursued for more than two decades. With greater understanding of the basic physics governing the production of these beams, advances in technology have promoted studies beyond measurements of total collision cross sections.
M Charlton, G Laricchia
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Atomic collision experiments using low-energy positron beams have been actively pursued for more than two decades. With greater understanding of the basic physics governing the production of these beams, advances in technology have promoted studies beyond measurements of total collision cross sections.
M Charlton, G Laricchia
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Wear, 1980
Abstract An experimental investigation and a theoretical treatment of impacting bodies are described. High energy impact experiments were performed by repeatedly striking a rectangular section metal fin on the face of a massive hammer against an equally massive anvil specimen at 300 and 650 °C.
G. Levy, A.A. Parry
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Abstract An experimental investigation and a theoretical treatment of impacting bodies are described. High energy impact experiments were performed by repeatedly striking a rectangular section metal fin on the face of a massive hammer against an equally massive anvil specimen at 300 and 650 °C.
G. Levy, A.A. Parry
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Impact ionization phenomena in AlGaAs/GaAs HBTs
Microelectronic Engineering, 1992Ionization phenomena in AlGaAs/GaAs HBTs are theoretically and experimentally investigated. The measured multiplication factor correlates well to the results of a Monte Carlo simulation of the device, which also provides general microscopic details of the pre-avalanche regime, and evidences the role of dead-space effects.
Di Carlo A. +4 more
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Impact of Aging Phenomena on Soft Error Susceptibility
2011 IEEE International Symposium on Defect and Fault Tolerance in VLSI and Nanotechnology Systems, 2011In this paper we address the issue of analyzing the effects of negative bias temperature instability (NBTI) on ICs' soft error susceptibility. We show that NBTI reduces significantly the critical charge of nodes of both combinational and sequential circuits during their in-field operation.
ROSSI, DANIELE +3 more
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Notes on photoelasticity of impact phenomena
International Journal of Mechanical Sciences, 1983Abstract Attenuation and interference of stress waves affect fringe propagation velocities and produce transitory sources and sinks of dynamic fringes. A simplified wave model serves to explain the basic phenomena involved. Striker impacts also create quasi-static fringes which are distinguishable within the dynamic pattern and may lead to an ...
M.L. Meyer, D.A.W. Taylor
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HYPERVELOCITY IMPACT PHENOMENA
1963Abstract : A summation of the research performed at the Explosives Research Laboratory, Pittsburgh, Pa. in the field of hypervelocity impact on thin targets is presented. The immediate goal of the research is to obtain a complete description of the thin-plate perforation process within the limits of available explosive projectors.
Frank C. Gibson +3 more
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The scaling of impact phenomena
International Journal of Impact Engineering, 1987Abstract A basis for scaling laws for impact phenomena is the approximation of the actual problem with a point-source problem. Point-source solutions are characterized by a single scalar coupling-parameter measure aU μδυ of the radius a , velocity U and mass density δ of the impactor.
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Bifurcations and transition phenomena in an impact oscillator
Chaos, Solitons & Fractals, 1996zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Impact Phenomena at High Speeds
Journal of Applied Physics, 1956A study of high speed, metal-to-metal impact in the velocity range 1 to 5 mm/μsec using ⅛-inch diameter spherical pellets is described. Pellet materials include aluminum, magnesium, steel, brass, lead, and zinc. Experiments relating to the mechanisms of cratering and the perforation of thin targets are presented. For the ⅛-in.
M. E. Van Valkenburg +2 more
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