Abstract
This article is an extract from a commemorative lecture by the author at the time of his retirement from Tohoku University, March 1997, focusing on his research in the field of cryogenic engineering. The motives, difficulties, and outlines of his studies on the following subjects are described: thermoelectric semiconductors, cooling technology for electronic equipment, natural convection, heat exchangers, air-water mist cooling, gas fluidized beds, heat-transfer control, transcritical thermal phenomena, thermal stability of superconducting coils and visualization of quench, rapid transient boiling of liquid helium, cryoprobes, etc.
