A method of making telechelic oligomers comprises reacting a substrate compound selected from the group consisting of relatively high molecular weight polymers with a chain transfer agent in the presence of an alkali metal catalyst. The invention also provides a particular preparation of the catalyst. In addition, the system estimates probability distributions for various properties of events associated with each cluster. By controlling the engaging force regulating mechanism on the basis of the target relative rotation speed set in this way, a prompt and appropriate lockup operation of the lockup clutch is realized in response to the vehicle conditions. The semiconductor device further includes a hanging pin section provided on the element non-forming surface of the semiconductor chip, and a sealing member with which the semiconductor chip is sealed including the hanging pin section and a bonding section between the first and second internal leads and the first and second bonding wires. The fluorescence component of return radiation which is received from a detection volume is eliminated which is enabled by the usage of a pulsed excitation light source.