We present a sensitive diffusion cloud chamber which does not require any radioactive sources. A major difference from commonly used chambers is the use of a heat sink as its bottom plate. The result of a performance test of the chamber is given. (Contains 8 figures.)

The method for extracting and separating hydrophobic photosynthetic pigments proposed by Katayama "et al." ("Japanese Journal of Phycology," 42, 71-77, 1994) has been improved to introduce it to student laboratories at the senior high school level. Silica gel powder was used for removing water from fresh materials prior to…

To cope with some social problems, Japanese educational planners are drafting some proposals for research into innovations in the educational system. This paper reports on some research recently done which looked into the relationships of the Japanese educational environment and the reasoning/thinking skills and process skills of students in…

Organized by the International Commission on Physics Education (ICPE) and the Physics Education Society of Japan, the conference reported here, the first of its kind held in Asia, was designed to inform teachers of results of prior ICPE conferences as well as to explore desirable directions for physics education, and was attended by nearly 450…