TY - JOUR A1 - Matsuyama, K. A1 - Katsuragi, H. T1 - Power law statistics of force and acoustic emission from a slowly penetrated granular bed JO - Nonlin. Processes Geophys. J1 - NPG VL - 21 IS - 1 SP - 1 EP - 8 Y1 - 2014/01/03 PB - Copernicus Publications SN - 1607-7946 UR - https://npg.copernicus.org/articles/21/1/2014/ L1 - https://npg.copernicus.org/articles/21/1/2014/npg-21-1-2014.pdf DO - 10.5194/npg-21-1-2014 ER -