Cryotank In science fiction, cryogenic tanks are used to freeze people. "cry-" is a Greek prefix which means "cold or freezing", hence humans are stored in the tank frozen until a future date. Cryotanks are found in some science fiction films such as "Prometheus" (2012) and "The Host" (2013). Cryotank Cryotank or cryogenic tank is a tank that is used to store frozen biological material. The term “cryotank” refers to storage of super-cold fuels, such as liquid oxygen and liquid hydrogen. Cryotanks and cryogenics can be seen in many sci-fi movies, but they are still currently undeveloped. All that needs to
Prefix code prefix code. As with a prefix code, the representation of a string as a concatenation of such words is unique. A bifix code is a set of words which is both a prefix and a suffix code. An optimal prefix code is a prefix code with minimal average length. That is, assume an alphabet of symbols with probabilities formula_2 for a prefix code . If is another prefix code and formula_3 are the lengths of the codewords of , then formula_4. Examples of prefix codes include: Commonly used techniques for constructing prefix codes include Huffman codes and the earlier Shannon-Fano