{'fraction_non_alphanumeric': 0.017241379310344827, 'fraction_numerical': 0.004497751124437781, 'mean_word_length': 5.238317757009346, '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': 1, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Development of practical high-intensity thermal protection systems.

Abstract : The military requirement for high-intensity thermal protection entails provision of a system which is effective in the nuclear weapon range and at the same time practical from the logistics point of view and comfortable for extended periods of wear. With these ends in mind, small-scale laboratory procedures and full-scale evaluation procedures were devised whereby specific systems could be designed to meet specific needs. Thermal barriers were designed through application of basic heat transfer principles with careful consideration for the influence of thermal and optical properties of materials on heat exchange. In the present example a green assembly was developed to replace a white one designed for protection of flight personnel from the thermal effects of nuclear weapons. In thermal exposures delivering approximately 50 cal/(sq cm) in 2 seconds in some areas, with an overall average of about 20 cal/(sq cm) in 2 seconds, the new system offered protection equal to that of the white assembly while weighing only half as much and representing significant advantages in comfort and logistics. The procedures developed in this study are general in nature and widely applicable to the development of other thermal protection systems. (Author)