Superconductivity is not only a phenomenon of zero electrical resistance, but also a fascinating phenomenon that exhibits a variety of physical properties such as unique magnetic properties due to quantum effects and the Josephson effect. In order to achieve higher superconducting transition temperatures, the mechanism of high-temperature superconductivity is being studied intensively. To date, unconventional superconductors have been found that exhibit properties different from those of conventional metallic superconductors. The basic idea of the physics of these materials will be introduced, and the various phenomena appearing in high-Tc superconductors will be reviewed.

The oceans, which are responsible for the Earth's homeostasis, cover 70% of its surface and are on average deeper than the height of Mt. The oceans are a generally stable environment for living organisms, and a wide variety of life forms have entered and adapted to the various marine environments. In this lecture, I will explain how life adapts to various marine environments, mainly from a physiological perspective.

Radioactive waste generated by nuclear power generation already exists in Japan, and its proper disposal is an important issue for society regardless of the future nuclear energy policy. The so-called "geological disposal" of radioactive waste is being considered as a method of disposal, but it is true that there are concerns about the use of underground environments that cannot be seen directly and difficulties in discussing the time span of tens of thousands of years. Furthermore, since the accident at the Fukushima Daiichi Nuclear Power Plant, there is distrust of current technology. Under these circumstances, how should we think about the issue of radioactive waste disposal? I would like to think about this together with the participants.