Abstract: Information processing system including: a plurality of process control units storing process data including present value and time-series data or historical data, and a plurality of data collection units collecting and processing data from the process control units. The data collection units each include: a first dynamic management section managing access and exit of the data collection unit of interest to and from the information processing system and managing operating status of all data collection units currently accessing the information processing system; a second dynamic management section managing addition and removal of process control units to and from the information processing system; and a charge determination section determining process control units to be taken charge of by the data collection unit of interest based on first identification information allocated to each of the data collection units and on second identification information allocated to each of the process control units.

Abstract: Information processing system including: a plurality of process control units storing process data including present value and time-series data or historical data, and a plurality of data collection units collecting and processing data from the process control units. The data collection units each include: a first dynamic management section managing access and exit of the data collection unit of interest to and from the information processing system and managing operating status of all data collection units currently accessing the information processing system; a second dynamic management section managing addition and removal of process control units to and from the information processing system; and a charge determination section determining process control units to be taken charge of by the data collection unit of interest based on first identification information allocated to each of the data collection units and on second identification information allocated to each of the process control units.

Abstract: A tube is wound into a coil, and the resulting coil of tube is vibrated so that a given point of the tube reciprocates along a helical path. An optical fiber is fed into the coil of tube that is being thus vibrated. Because of the vibration, the inner wall of the tube exerts such a force as to move the optical fiber diagonally upward and forward. This force causes the optical fiber to jump in the tube diagonally upward and forward and slide forward along the inner wall of the tube. The intermittent conveying force exerted by the inner wall of the tube in the direction of the circumference of the coil causes the optical fiber in the tube to travel forward, thereby pulling in additional length of the optical fiber from outside the tube.

Abstract: A tube is wound into a coil, and the resulting coil of tube is vibrated so that a given point of the tube reciprocates along a helical path. An optical fiber is fed into the coil of tube that is being thus vibrated. Because of the vibration, the inner wall of the tube exerts such a force as to move the optical fiber diagonally upward and forward. This force causes the optical fiber to jump in the tube diagonally upward and forward and slide forward along the inner wall of the tube. The intermittent conveying force exerted by the inner wall of the tube in the direction of the circumference of the coil causes the optical fiber in the tube to travel forward, thereby pulling in additional length of the optical fiber from outside the tube.