Erasure of memory in paste by irradiation of ultrasonic waves Akio Nakahara, Ryota Yoneyama, Maruto Ito, Yousuke Matsuo and So Kitsunezaki EPJ Web Conf., 140 (2017) 12007 Published online: 30 June 2017 DOI: 10.1051/epjconf/201714012007