Akiyo Nomura  Akiyo Nomura photo         

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Researcher
IBM Research - Tokyo
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Professional Associations

Professional Associations:  Institute of Electronics, Information and Communication Engineers

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More information:  Google Scholar


2021

Fully on-chip MAC at 14nm enabled by accurate row-wise programming of PCM-based weights and parallel vector-transport in duration-format
Pritish Narayanan, Stefano Ambrogio, Atsuya Okazaki, Kohji Hosokawa, Hsinyu Tsai, Akiyo Nomura, Takeo Yasuda, Charles Mackin, Scott C. Lewis, Alexander Friz, Masatoshi Ishii, Yasuteru Kohda, Hiroyuki Mori, Katie Spoon, Riduan Khaddam-Aljameh, Nicole Saulnier, Marc Bergendahl, James Demarest, Kevin W. Brew, Victor Chan, Sam Choi, Injo Ok, Ishtiaq Ahsan, Fee Li Lie, Wilfried Haensch, Vijay Narayanan, Geoffrey W. Burr
2021 Symposium on VLSI Technology, pp. 1--2

Analysis of Effect of Weight Variation on SNN Chip with PCM-Refresh Method
Akiyo Nomura, Megumi Ito, Atsuya Okazaki, Masatoshi Ishii, Sangbum Kim, Junka Okazawa, Kohji Hosokawa, Wilfried Haensch
Neural Processing Letters 53(3), 1741--1751, Springer US, 2021


2019

On-Chip Trainable 1.4M 6T2R PCM Synaptic Array with 1.6K Stochastic LIF Neurons for Spiking RBM
M. Ishii, S. Kim, S. Lewis, A. Okazaki, J. Okazawa, M. Ito, M. Rasch, W. Kim, A. Nomura, U. Shin, K. Hosokawa, M. BrightSky, W. Haensch
2019 IEEE International Electron Devices Meeting (IEDM)

Performance Analysis of Spiking RBM with Measurement-Based Phase Change Memory Model
Masatoshi Ishii, Megumi Ito, Wanki Kim, SangBum Kim, Akiyo Nomura, Atsuya Okazaki, Junka Okazawa, Kohji Hosokawa, Matt BrightSky, Wilfried Haensch
Neural Information Processing, pp. 591--599, Springer International Publishing, 2019

Analysis of Effect of Weight Variation on SNN Chip with PCM-Refresh Method
Akiyo Nomura, Megumi Ito, Atsuya Okazaki, Masatoshi Ishii, Sangbum Kim, Junka Okazawa, Kohji Hosokawa, Wilfried Haensch
Neural Processing Letters, 1-11, 2019

Training Large-Scale Spiking Neural Networks on Multi-core Neuromorphic System Using Backpropagation
Megumi Ito, Malte J. Rasch, Masatoshi Ishii, Atsuya Okazaki, Sangbum Kim, Junka Okazawa, Akiyo Nomura, Kohji Hosokawa, Wilfried Haensch
International Conference on Neural Information Processing, pp. 185-194, 2019


2018

Lightweight Refresh Method for PCM-based Neuromorphic Circuits
M. Ito, M. Ishii, A. Okazaki, S. Kim, J. Okazawa, A. Nomura, K. Hosokawa, W. Haensch
2018 IEEE 18th International Conference on Nanotechnology (IEEE-NANO), pp. 1-4

NVM Weight Variation Impact on Analog Spiking Neural Network Chip
Akiyo Nomura, Megumi Ito, Atsuya Okazaki, Masatoshi Ishii, Sangbum Kim, Junka Okazawa, Kohji Hosokawa, Wilfried Haensch
Neural Information Processing, pp. 676--685, Springer International Publishing, 2018


2017

Temperature dependence of Rashba-Edelstein magnetoresistance in Bi/Ag/CoFeB trilayer structures
Hiroyasu Nakayama, Hongyu An, Akiyo Nomura, Yusuke Kanno, Satoshi Haku, Yusaku Kuwahara, Hiroto Sakimura, Kazuya Ando
Applied Physics Letters 110(22), 2017
physics, magnetoresistance, magnetic field, condensed matter physics, bismuth

Absorption of diffusive spin current in surface and bulk states of a topological insulator
Akiyo Nomura, Nariaki Nasaka, Takaharu Tashiro, Takao Sasagawa, Kazuya Ando
Physical Review B 96(21), 2017
topological insulator, spin, physics, condensed matter physics


2016

Spin-orbit torques in asymmetric Pt/Co/Pt structures
Hongyu An, Hiroyasu Nakayama, Yusuke Kanno, Akiyo Nomura, Satoshi Haku, Kazuya Ando
Physical Review B 94(21), 2016
torque, spin, physics, orbit, nuclear magnetic resonance, condensed matter physics

Rashba-Edelstein Magnetoresistance in Metallic Heterostructures
Hiroyasu Nakayama, Yusuke Kanno, Hongyu An, Takaharu Tashiro, Satoshi Haku, Akiyo Nomura, Kazuya Ando
Physical Review Letters 117(11), 2016
spin, physics, nuclear magnetic resonance, metal, magnetoresistance, magnetization, heterojunction, giant magnetoresistance, electrical resistance and conductance, condensed matter physics, colossal magnetoresistance


2015

Temperature dependence of inverse Rashba-Edelstein effect at metallic interface
Akiyo Nomura, Takaharu Tashiro, Hiroyasu Nakayama, Kazuya Ando
Applied Physics Letters 106(21), 2015
spin, spin pumping, spin polarization, spin engineering, spin hall effect, physics, nuclear magnetic resonance, heterojunction, ferromagnetism, energy conversion efficiency, condensed matter physics

Spin-current emission governed by nonlinear spin dynamics
Takaharu Tashiro, Saki Matsuura, Akiyo Nomura, Shun Watanabe, Keehoon Kang, Henning Sirringhaus, Kazuya Ando
Scientific Reports 5(1), 15158-15158, 2015
spintronics, spin, spin hall effect, physics, orbital magnetization, magnon, magnetization transfer, magnetization dynamics, magnetization, condensed matter physics