{'fraction_non_alphanumeric': 0.02516411378555799, 'fraction_numerical': 0.002188183807439825, 'mean_word_length': 4.791139240506329, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Bubble dynamics near the onset of single-bubble sonoluminescence.

A number of groups have reported measurements of the location in the parameter space of bubble size versus acoustic pressure amplitude of shape- and size-stable bubbles. For air/water systems, a general trend emerges: stable bubbles are found on one of two line paths in this space defined by their range of acoustic pressure. Bubbles on the higher-pressure path emit light. There have been few studies of the transition between these two paths. In this work we describe our observations of this transition regime. In this regime, a slow time scale oscillation (period 2-7 s) in the bubble size, position, and phase of flash timing can be observed. At lower dissolved gas concentrations, a hysteresis in the bubble size as a function of acoustic pressure is observed, complementing previous light intensity measurements reported in the literature.