The efficient stimulated Raman scattering conversion in a diode-pumped actively Q-switched Nd:YAG laser was achieved with an undoped YVO4 crystal as a Raman shifter. With an incident pump power of 16.2 W, 1176-nm first Stokes average output power of 2.97 W was generated at a pulse repetition rate of 50 kHz. The maximum pulse energy is higher than 83 μJ at both 20 kHz and 30 kHz. With mode-locke...

Cell disruption in a novel 266 kHz system (0.6 ml) that has batch and flow-through capabilities was compared with that achieved with a 20 kHz (2.4 ml) generator. Batch suspensions of Saccharomyces cerevisiae were exposed to cavitation for times up to 5 min. Protein release (an assay of cell disruption) was measured using the Lowry method. The rate of protein release was similar for both systems...

A within-subject comparison of auditory steady-state response (ASSR) and psychophysical measurements of aerial hearing sensitivity was conducted with an individual of the largest otariid species, the Steller sea lion. Psychophysical methods were used to obtain an unmasked aerial audiogram at 13 frequencies, spanning a range of 0.125-34 kHz. The subject had a hearing range (frequencies audible a...

The paper introduces some details of new hand-held sensor with extended vibration frequency measurement range till 20 kHz. The sensor provides new diagnostics capabilities especially for rolling/ball bearings and gearboxes. It is related to discovering the unknown before behavior of one point contact metal to metal. It is found that traditional transfer function is incorrectly described after r...

An evoked-potential audiogram was measured for an Indo-Pacific humpback dolphin (Sousa chinensis) living in the dolphinarium of Nanning Zoo, China. Rhythmic 20 ms pip trains composed of cosine-enveloped 0.25 ms tone pips at a pip rate of 1 kHz were presented as sound stimuli. The dolphin was trained to remain still at the water surface and to wear soft latex suction-cup EEG electrodes used to m...

We present the statistical analysis of spectral response solar radio type III bursts over wide frequency range between 20 kHz and 410 MHz. For this purpose, we have used observations that were carried out using both spaced-based (Wind/Waves) ground-based (Nan\c{c}ay Decameter Array Nan\c{c}ay Radioheliograph) facilities. In order to compare flux densities observed by different instruments, care...

We tested the hypothesis that ultrasound in controlling cyanobacteria and algal blooms is “environmental friendly” by exposing the non-target zooplankton grazer Daphnia magna to ultrasound produced by commercially available ultrasound transducers. In populations of 15 Daphnia (~2 mm body size) exposed in 800 mL of water to ultrasound supplied at 20 kHz, 28 kHz, 36 kHz or 44 kHz, all animals wer...