Results 241 to 250 of about 257,298 (302)
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Laser pulses into bullets: tabletop shock experiments
Physical Chemistry Chemical Physics, 2022A tabletop pulsed laser can launch a hypervelocity flyer plate to create high temperatures and pressures in a nanosecond in an array of solid or liquid samples.
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Focusing properties of shocking optical pulses
Optics Letters, 2001We show that optical-cycle steepening in a nonlinear dielectric before focusing results in an arbitrarily large enhancement of the focused intensity and energy density. The focusing of an optical shock produces singular intensity and energy density at the focal point.
M A, Porras +2 more
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Shock Pulse Measurement of Bearings
Aircraft Engineering and Aerospace Technology, 1970WHEN a rolling bearing is damaged as a result of fatigue, spalling occurs cither on the ring tracks or on the surface of rolling elements. As a roller or a ball rolls over these spalls, which are depressions in the surfaces of the rings also known as flaking, impacts occur.
Per Arne Boto, Ingemar Fernlund
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Carrier Wave Shocking of Femtosecond Optical Pulses
Physical Review Letters, 1996Numerical integration of Maxwell's equations for propagation of a femtosecond pulse in a medium with linear Lorentz response and a Kerr nonlinearity shows shock formation on the underlying carrier wave prior to the envelope shock. The carrier shock is characterized by the appearance of a strong third harmonic pulse, whereas the envelope shock appears ...
, Flesch, , Pushkarev, , Moloney
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Sensor for acoustic shock wave pulses
The Journal of the Acoustical Society of America, 1989A sensor for acoustic shockwave pulses, such as in lithotripsy, includes a piezo-electric measuring membrane disposed between two coupling membranes. The intervening space between the coupling membranes is filled with a coupling medium for transmitting the acoustic shockwave pulses.
Hans Rochling, Karl H. Schlee
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Method for stimulating a shock pulse
The Journal of the Acoustical Society of America, 1986A method for simulating a shock pulse on an encapsulated component wherein the encapsulated component is placed in a specimen container attached to an end of a pressure bar having a mass and a drop height chosen to simulate the shock pulse. The specimen container attached to the pressure bar is dropped on an anvil and the resulting shock pulse is ...
Monty W. Bai, Alfred B. Meyer
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1974
Abstract : This report contains Shock Pulse data on the tailrotor hanger bearing, the forty-two degree gearbox, and the ninety degree gearbox. Also this report contains a preliminary study of using the shock pulse technique on the OH-58A and on determining the condition of gears in the 42 degree gearbox. The Shock Pulse technique works on the principle
J. Thomas Harrington +3 more
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Abstract : This report contains Shock Pulse data on the tailrotor hanger bearing, the forty-two degree gearbox, and the ninety degree gearbox. Also this report contains a preliminary study of using the shock pulse technique on the OH-58A and on determining the condition of gears in the 42 degree gearbox. The Shock Pulse technique works on the principle
J. Thomas Harrington +3 more
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When shock is shocked: Riemann problem dynamics at pulse ionization of a shock wave
Physics of Fluids, 2017We study the dynamics of the gas flow discontinuities after pulse ionization of a half space in front of a flat shock wave moving in a channel. Pulse volumetric electric discharge initiated in the vicinity of the shock concentrates in front of the shock and heats the gas there. The heating is shown to be very rapid.
Igor Doroshchenko +3 more
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Shock peening by ultrashort pulsed lasers
ICALEO 2018: 37th International Congress on Applications of Lasers & Electro-Optics, 2018We compared the results of femtosecond laser peening obtained at different condition (in air without coating, in water and in air with coating) and by different overlap ratio. Austenic stainless steel was used as the test sample. The Vickers microhardness was used to probe the work hardening and a 3D profilometer was used to evaluate the surface ...
Yuxin Li, Xin Zhao, Yalin Dong, Chang Ye
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Biological Psychology, 1985
Previous research has evaluated finger pulse volume (FPV) as a psychophysiological measure and found it to reflect anxiety, orienting, effort and anger. Controllable versus uncontrollable threats have been found to have different effects on cardiovascular parameters, including pulse rate (PR) and systolic blood pressure (SBP).
T W, Smith, B K, Houston, R J, Stucky
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Previous research has evaluated finger pulse volume (FPV) as a psychophysiological measure and found it to reflect anxiety, orienting, effort and anger. Controllable versus uncontrollable threats have been found to have different effects on cardiovascular parameters, including pulse rate (PR) and systolic blood pressure (SBP).
T W, Smith, B K, Houston, R J, Stucky
openaire +2 more sources