{'fraction_non_alphanumeric': 0.012658227848101266, 'fraction_numerical': 0.0, 'mean_word_length': 4.971698113207547, '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}}
Life Time Test of Rewritable Mini Disc (MD) Media

The lifetime test of optical media is discussed on the rewritable Mini Disc media for consumer use. The experiments were applying the method conventionally used for the data storage optical disc. Judging from some respects of the experimental results, the lifetime of the recording layer of rewritable MD media presently available in the market is deemed to be sufficiently long. In order to establish a measurement method to determine the reliability or lifetime of rewritable MD media, it is necessary to discuss the issues from view points except degradation of recording layer.