Results 251 to 260 of about 257,298 (302)
Some of the next articles are maybe not open access.
Shock wave generator for generating an acoustical shock wave pulse
The Journal of the Acoustical Society of America, 1991A shock wave generator has a focusing stage wherein a number of different lenses having respectively different concentrating characteristics are accommodated, and which can be selectively introduced transversely into the path of the shock wave pulse, by linear displacement or by pivoting.
Helmut Reichenberger, Georg Naser
openaire +1 more source
American Heart Journal, 1993
To determine whether dual-pathway sequential shocks and single-pathway biphasic shocks improved the efficacy of transthoracic defibrillation, we delivered single or sequential truncated waveform shocks of variable duration, voltage, and direction (polarity) to three groups of closed-chest dogs.
B D, Scott +4 more
openaire +2 more sources
To determine whether dual-pathway sequential shocks and single-pathway biphasic shocks improved the efficacy of transthoracic defibrillation, we delivered single or sequential truncated waveform shocks of variable duration, voltage, and direction (polarity) to three groups of closed-chest dogs.
B D, Scott +4 more
openaire +2 more sources
Shock profile induced by short laser pulses
Journal of Applied Physics, 1996Standard 25-μm-thick polyvinilydene fluoride (PVDF) piezoelectric gauges and new 450-μm-thick P(VDF 70%, TrFE 30%) piezoelectric copolymer have been used to record shock profiles at the back face of metallic targets irradiated by laser pulses of 2.5 and 0.6 ns duration at a 1.06 μm wavelength.
S. Couturier +4 more
openaire +1 more source
Pressure-shock-controlled pulsed molecular beams
Technical Physics, 2002A method of controlling the duration of pulses of intense molecular beams is suggested. The idea of the method is the shortening of an initial molecular beam pulse by producing a pressure shock in front of a solid surface through which the beam passes.
openaire +1 more source
Shock Pulse Effects on Wheat Growth
Physiologia Plantarum, 1974AbstractWheat seedlings (Triticum aestivum cv. Pacific Blue Stem) grown under continuous low‐level illumination were used to study the effects of pressure variation and its duration. Growth was determined by dry weights, leaf length, and types of secondary roots produced.
openaire +1 more source
Shock pulse mitigation in various organic foams
Journal of Applied Polymer Science, 1971AbstractThe mechanical behavior of three kinds of organic foams, each at two different densities, was experimentally investigated under conditions of pulsed one‐dimensional strain shock loading. The input pulse width in each experiment was nominally 0.1 μsec, and the input stress level (as referenced to quartz) was varied between 10 and 23 kbar.
Richard J. Wasley +3 more
openaire +1 more source
Shock Pulse from a Sonoluminescing Gas Bubble
Journal of the Physical Society of Japan, 1997The shock pulse emanating from a sonoluminescing gas bubble was calculated by using the analytical solutions of the conservation equations for the gas inside the bubble and the Kirkwood-Bethe hypothesis for the outgoing wave. The rise time and the magnitude of the pulse signal are in good agreement with the observed values, which may provide the ...
Yoon-Pyo Lee +3 more
openaire +1 more source
Cavitation Due to Reflected Shock Pulses
The Journal of the Acoustical Society of America, 1969Cavitation caused by shock pulses reflected from the sea surface is studied. A breaking pressure of zero is assumed and a model based on spalled layers is proposed to determine the prominent characteristics. These characteristics include the extent of cavitation, and return pulse with an initial spike followed by an approximate rectangular pulse, which
openaire +1 more source
Sensor for evaluation of shock wave pulses
The Journal of the Acoustical Society of America, 1990A sensor for determining the position of shock wave pulses of a shock wave source comprises a device for holding a metal foil in the region of focus for the shock wave source. The metal foil is held to extend perpendicular to the main propagation direction of the pulses and the incidence of the pulses on the metal foil will cause a bulge-like ...
Helmut Reichenberger, Georg Naser
openaire +1 more source
Single Pulse Shock Tube Study of Allyl Radical Recombination
The Journal of Physical Chemistry A, 2013The recombination and disproportionation of allyl radicals has been studied in a single pulse shock tube with gas chromatographic measurements at 1-10 bar, 650-1300 K, and 1.4-2 ms reaction times. 1,5-Hexadiene and allyl iodide were used as precursors.
Aleksandr, Fridlyand +3 more
openaire +2 more sources