Thesis Developement of range-shower counter for detection of weak decay particle frm hypernuclei Shinkai, Naoki 1992, Osaka University Online software Spectroscopy in SKS Okusu, Atsushi 1992, Osaka University Charged particle decays of $^6_\Lambda{\rm Li}$ Ishikawa, Mitsuru 1993, Osaka University Measurement of $^5_\Lambda{\rm He}$ weak decay branching ratio Tanaka, Yasuo 1994, Osaka University Polarization and Asymmetric Weak Decay of $^5_\Lambda{\rm He}$ Ajimura, Shuhei 1998, Osaka University