Abstract: A cipher system for use by a sender and receiver provides a plaintext alphabet, each character of which is coded by a numerical synonym, the set of numerical synonyms comprising a collection of non-negative integers of common length and known to both sender and receiver. The system further provides a concatenation of the numerical synonyms comprising a plaintext message string integer corresponding to a plaintext message and a masking tape string integer comprising a randomly or pseudo-randomly accessed sequence of digits extracted from a string of digits accessible to both sender and receiver and added to the plaintext message string to form a ciphertext string. The numerical synonyms of plaintext alphabet characters may be permuted, relative to the normal listing of the alphabet, from message to message according to prior secret arrangement of sender and receiver.

Abstract: In a random coding cipher system and method, a sender and receiver pair share a long string of random digits, the masking tape. To encrypt a plaintext message, the sender generates a random integer (with a random number generator, RNG) or a pseudo-random integer (using a pseudo-random number generator, PRNG). This is the initializing integer. The sender then selects an integer formed from a subset of the digits of the initializing integer. This is the starting integer for the message. The starting integer determines a starting, or indexing, position in the masking tape for extraction of a sequence of blocks of digits, of common length, to be put in one-to-one correspondence with the characters of the plaintext alphabet used for communication. The integer blocks comprise the numerical synonyms for the plaintext alphabet characters.

Abstract: The invention consists of a process for evacuating volatile gases from confined spaces (notably refrigerants from refrigerating machinery), dissolving them in polar solvents by compression, cooling or both, purifying them, storing them and releasing them from solution by decompression or heating or both.

Abstract: A cipher system is disclosed in which each character of a plaintext alphabet has associated with it a randomly distributed collection of integers of a given length. This collection of integers is secretly shared by a sender and receiver pair. The plaintext characters of a message are sequentially coded by pseudo-randomly selecting representatives from the integer collections corresponding to the plaintext characters. To this sequence of concatenated integers, regarded as a single integer, is added a pseudo-random integer of length equal to that of the coded-for-message integer string. This pseudo-random integer is generated by a pseudo-random number generator (The receiver has a corresponding generator.), the output of which is initialized by a "seed" integer concealed in the cryptogram. The summed pseudo-random integer plus the coding integer string is transmitted as the body of the cryptogram.

Abstract: There is provided a chemically assisted mechanical refrigeration process including the steps of: mechanically compressing a refrigerant stream which includes vaporized refrigerant; contacting the refrigerant with a solvent in a mixer (11) at a pressure sufficient to promote substantial dissolving of the refrigerant in the solvent in the mixer (11) to form a refrigerant-solvent solution while concurrently placing the solution in heat exchange relation with a working medium to transfer energy to the working medium, said refrigerant-solvent solution exhibiting a negative deviation from Raoult's Law; reducing the pressure over the refrigerant-solvent solution in an evaporator (10) to allow the refrigerant to vaporize and substantially separate from the solvent while concurrently placing the evolving refrigerant-solvent solution in heat exchange relation with a working medium to remove energy from the working medium to thereby form a refrigerant stream and a solvent stream; and passing the solvent and refrigerant

Abstract: There is provided a chemically assisted mechanical refrigeration process including the steps of: mechanically compressing a refrigerant stream which includes vaporized refrigerant; contacting the refrigerant with a solvent in a mixer (11) at a pressure sufficient to promote substantial dissolving of the refrigerant in the solvent in the mixer (11) to form a refrigerant-solvent solution while concurrently placing the solution in heat exchange relation with a working medium to transfer energy to the working medium, said refrigerant-solvent solution exhibiting a negative deviation from Raoult's Law; reducing the pressure over the refrigerant-solvent solution in an evaporator (10) to allow the refrigerant to vaporize and substantially separate from the solvent while concurrently placing he evolving refrigerant-solvent solution in heat exchange relation with a working medium to remove energy from the working medium to thereby form a refrigerant stream and a solvent stream; and passing the solvent and refrigerant s