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The improvement and validity of shock measurements using only the laser head (heterodyne laser interferometer) of a commercial laser Doppler vibrometer was investigated by comparing acceleration waveforms measured by a homodyne laser interferometer with those measured by a heterodyne laser interferometer. The acceleration waveforms were generated from the displacement waveforms obtained with a reference...
When He gas is injected from room temperature into boiling liquid N2, boiling is suppressed, leaving liquid surface flat like a mirror. Although the qualitative explanation for this phenomenon is known [Minkoff GJ, Scherber FI, Stober AK. Suppression of bubbling in boiling refrigerants. Nature 1957;180(4599):1413–4], it has not been studied quantitatively and comprehensively yet. In this report, we...
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