[Journal of the Physical Society of Japan Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013) - Tokyo, Japan (August 5-9, 2013)] Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013) - Low-Energy Spin Fluctuations in CuCrO 2 and Cu 0.85 Ag 0.15 CrO 2 Studied by Inelastic Neutron Scattering