Abstract: A data transfer apparatus according to this invention executes a protocol priority determination process of selecting usable transfer protocols in accordance with the type of transfer object and determining the priorities of the transfer protocols in accordance with the process of an automatic file transfer protocol selection process routine. The data transfer apparatus then executes a protocol selection process of selecting transfer protocols commonly usable in the transfer source apparatus and transfer destination apparatus of the transfer object. The data transfer apparatus executes a transfer protocol determination process of determining a transfer protocol for use on the basis of the transfer protocol and its priority which are determined in the protocol priority determination process, and the transfer protocols selected in the protocol selection process.

Abstract: A data transfer apparatus according to this invention executes a protocol priority determination process of selecting usable transfer protocols in accordance with the type of transfer object and determining the priorities of the transfer protocols in accordance with the process of an automatic file transfer protocol selection process routine. The data transfer apparatus then executes a protocol selection process of selecting transfer protocols commonly usable in the transfer source apparatus and transfer destination apparatus of the transfer object. The data transfer apparatus executes a transfer protocol determination process of determining a transfer protocol for use on the basis of the transfer protocol and its priority which are determined in the protocol priority determination process, and the transfer protocols selected in the protocol selection process.

Abstract: An aerobic-cultivation tank of vertical type comprises: a closed outer tank structure of cylindrical shape; an internal cooling jacket secured concentrically to the inner wall surface of said tank structure and having a cylindrical space for accommodating a coolant; a plurality of fluid downcast pipes passed vertically through said space and being open at upper and lower ends thereof to upper and lower interior parts of the tank structure; means for passing the coolant through said space; and means for supplying fluid media into the tank structure, whereby, when the fluid media are supplied into the tank structure to a level above the upper ends of the fluid downcast pipes, the fluid media overflow into and descend through said pipes, while being cooled, into a lower interior part of the tank, while a portion of said fluid media in contact with the inner surface of the cooling jacket is also cooled and descends, the fluid media body as a whole thereby undergoing a natural circulatory flow due to convection.