The Construction of Observational Heterarchy on One-Dimensional Map System. - Kohei Nakajima; Soya Shinkai (BIOCOMP, 2007)

Formal Model of Embodiment on Abstract Systems: From Hierarchy to Heterarchy. - Kohei Nakajima; Soya Shinkai; Takashi Ikegami (ECAL, 2007)

Interoperation between Atomic Energy Grid Infrastructure (AEGIS) and Other Grids. - Yoshio Suzuki; Noriyuki Kushida; Naoya Teshima; Kohei Nakajima; Akemi Nishida; Norihiro Nakajima (High Performance Computing on Vector Systems, 2008)

Considering the reconfiguration process of subjective temporal order by using recurrent neural networks. - Kohei Nakajima; Takashi Ikegami (ALIFE, 2008)

Embodiment of the Game of Life. - Kohei Nakajima; Taichi Haruna (ECAL (1), 2009)

Self-organized Segregation Effect on Water Based Self-Assembling Robots. - Aubery Marchel Tientcheu Ngouabeu; Shuhei Miyashita; Rudolf M. Füchslin; Kohei Nakajima; Maurice Göldi; Rolf Pfeifer (ALIFE, 2010)

Dynamical Systems Interpretation of Reversal of Subjective Temporal Order Due to Arm Crossing. - Kohei Nakajima; Takashi Ikegami (Adapt. Behav., 2010)

Biologically inspired control of a simulated octopus ARM via recurrent neural networks. - Kohei Nakajima; Tao Li; Naveen Kuppuswamy; Rolf Pfeifer (GECCO (Companion), 2011)

Harnessing the dynamics of a soft body with "timing": Octopus inspired control via recurrent neural networks. - Kohei Nakajima; Tao Li; Naveen Kuppuswamy; Rolf Pfeifer (ICAR, 2011)

Information theoretic analysis on a soft robotic arm inspired by the octopus. - Kohei Nakajima; Tao Li; Hidenobu Sumioka; Matteo Cianchetti; Rolf Pfeifer (ROBIO, 2011)

Self-organized perturbations enhance class IV behavior and 1/f power spectrum in elementary cellular automata. - Kohei Nakajima; Taichi Haruna (Biosyst., 2011)

Permutation Complexity via Duality between Values and Orderings - Taichi Haruna; Kohei Nakajima (CoRR, 2011)

Permutation Excess Entropy and Mutual Information between the Past and Future - Taichi Haruna; Kohei Nakajima (CoRR, 2011)

Symbolic transfer entropy rate is - Taichi Haruna; Kohei Nakajima (CoRR, 2011)

How to Harness the Dynamics of Soft Body: Timing Based Control of a Simulated Octopus Arm via Recurrent Neural Networks. - Kohei Nakajima; Tao Li; Naveen Kuppuswamy; Rolf Pfeifer (FET, 2011)

Basic Problems in Self-Assembling Robots and a Case Study of Segregation on Tribolon Platform. - Shuhei Miyashita; Aubery Marchel Tientcheu Ngouabeu; Rudolf M. Füchslin; Kohei Nakajima; Christof Audretsch; Rolf Pfeifer (Bio-Inspired Self-Organizing Robotic Systems, 2011)

Behavior switching using reservoir computing for a soft robotic arm. - Tao Li; Kohei Nakajima; Matteo Cianchetti; Cecilia Laschi; Rolf Pfeifer (ICRA, 2012)

Timing-based control via echo state network for soft robotic arm. - Junichi Kuwabara; Kohei Nakajima; Rongjie Kang; David T. Branson; Emanuele Guglielmino; Darwin G. Caldwell; Rolf Pfeifer (IJCNN, 2012)

Embodiment enables the spinal engine in quadruped robot locomotion. - Qian Zhao; Kohei Nakajima; Hidenobu Sumioka; Xiaoxiang Yu; Rolf Pfeifer (IROS, 2012)

Local information transfer in soft robotic arm. - Kohei Nakajima; Tao Li; Rongjie Kang; Emanuele Guglielmino; Darwin G. Caldwell; Rolf Pfeifer (ROBIO, 2012)

The function of the spine and its morphological effect in quadruped robot locomotion. - Qian Zhao; Hidenobu Sumioka; Xiaoxiang Yu; Kohei Nakajima; Zhimin Wang; Rolf Pfeifer (ROBIO, 2012)

Online learning for behavior switching in a soft robotic arm. - Tao Li; Kohei Nakajima; Rolf Pfeifer (ICRA, 2013)

Computing with a muscular-hydrostat system. - Kohei Nakajima; Helmut Hauser; Rongjie Kang; Emanuele Guglielmino; Darwin G. Caldwell; Rolf Pfeifer (ICRA, 2013)

Spine dynamics as a computational resource in spine-driven quadruped locomotion. - Qian Zhao; Kohei Nakajima; Hidenobu Sumioka; Helmut Hauser; Rolf Pfeifer (IROS, 2013)

Bootstrapping Perception using Information Theory: Case Studies in a quadruped Robot Running on Different grounds. - Nico M. Schmidt; Matej Hoffmann; Kohei Nakajima; Rolf Pfeifer (Adv. Complex Syst., 2013)

Self-Organized Translational Wheeling Motion in Stochastic Self-Assembling Modules. - Shuhei Miyashita; Kohei Nakajima; Zoltán Nagy 002; Rolf Pfeifer (Artif. Life, 2013)

Permutation Complexity and Coupling Measures in Hidden Markov Models. - Taichi Haruna; Kohei Nakajima (Entropy, 2013)

A soft body as a reservoir: case studies in a dynamic model of octopus-inspired soft robotic arm. - Kohei Nakajima; Helmut Hauser; Rongjie Kang; Emanuele Guglielmino; Darwin G. Caldwell; Rolf Pfeifer (Frontiers Comput. Neurosci., 2013)

Spine as an engine: effect of spine morphology on spine-driven quadruped locomotion. - Qian Zhao; Hidenobu Sumioka; Kohei Nakajima; Xiaoxiang Yu; Rolf Pfeifer (Adv. Robotics, 2014)

Dynamics Underneath Symbols: A Case Study in Autonomous Agents. - Kohei Nakajima (CoRR, 2014)

Symbolic local information transfer. - Kohei Nakajima; Taichi Haruna (CoRR, 2014)

Exploiting short-term memory in soft body dynamics as a computational resource. - Kohei Nakajima; Tao Li; Helmut Hauser; Rolf Pfeifer (CoRR, 2014)

Measuring information transfer in a soft robotic arm. - Kohei Nakajima; Nico M. Schmidt; Rolf Pfeifer (CoRR, 2014)

Harnessing disordered quantum dynamics for machine learning. - Keisuke Fujii 002; Kohei Nakajima (CoRR, 2016)

Mass-Spring Damper Array as a Mechanical Medium for Computation. - Yuki Yamanaka; Takaharu Yaguchi; Kohei Nakajima; Helmut Hauser (ICANN (3), 2018)

Information processing using a single Izhikevich neuron. - Tomoyuki Kubota; Kohei Nakajima; Hirokazu Takahashi (ALIFE, 2018)

Use of recurrent infomax to improve the memory capability of input-driven recurrent neural networks. - Hisashi Iwade; Kohei Nakajima; Takuma Tanaka; Toshio Aoyagi (CoRR, 2018)

Echo State Property of Neuronal Cell Cultures. - Tomoyuki Kubota; Kohei Nakajima; Hirokazu Takahashi (ICANN (Workshop), 2019)

Unpredictable as dice: analyzing riddled basin structures in a passive dynamic walker. - Nozomi Akashi; Kohei Nakajima; Yasuo Kuniyoshi (MHS, 2019)

Soft bodies as input reservoir: role of softness from the viewpoint of reservoir computing. - Katsuma Inoue; Kohei Nakajima; Yasuo Kuniyoshi (MHS, 2019)

Information Processing Capability of Soft Continuum Arms. - Estefany A. Torres; Kohei Nakajima; Isuru S. Godage (RoboSoft, 2019)

Dynamical Anatomy of NARMA10 Benchmark Task. - Tomoyuki Kubota; Kohei Nakajima; Hirokazu Takahashi (CoRR, 2019)

Optimal short-term memory before the edge of chaos in driven random recurrent networks. - Taichi Haruna; Kohei Nakajima (CoRR, 2019)

Shape reconstruction of CCD camera-based soft tactile sensors. - Gabor Soter; Helmut Hauser; Andrew Conn 002; Jonathan Rossiter; Kohei Nakajima (IROS, 2020)

Emulating a sensor using soft material dynamics: A reservoir computing approach to pneumatic artificial muscle. - Ryo Sakurai; Mitsuhiro Nishida; Hideyuki Sakurai; Yasumichi Wakao; Nozomi Akashi; Yasuo Kuniyoshi; Yuna Minami; Kohei Nakajima (RoboSoft, 2020)

Mixing State Estimation of Peristaltic Continuous Mixing Conveyor with Distributed Sensing System Based on Soft Intestine Motion. - Kota Wakamatsu; Katsuma Inoue; D. Hagiwara; H. Adachi; Daisuke Matsui; Shunichi Kurumaya; Rie Nishihama; Manabu Okui; Kohei Nakajima; Yasuo Kuniyoshi; Taro Nakamura 001 (RoboSoft, 2020)

Designing spontaneous behavioral switching via chaotic itinerancy. - Katsuma Inoue; Kohei Nakajima; Yasuo Kuniyoshi (CoRR, 2020)

Physical reservoir computing - An introductory perspective. - Kohei Nakajima (CoRR, 2020)

Higher-Order Quantum Reservoir Computing. - Quoc-Hoan Tran; Kohei Nakajima (CoRR, 2020)

Universal Approximation Property of Quantum Feature Map. - Takahiro Goto; Quoc-Hoan Tran; Kohei Nakajima (CoRR, 2020)

Performance Improvement of FORCE Learning for Chaotic Echo State Networks. - Ruihong Wu; Kohei Nakajima; Yongping Pan 001 (ICONIP (2), 2021)

Wearable Tactile Sensor Suit for Natural Body Dynamics Extraction: Case Study on Posture Prediction Based on Physical Reservoir Computing. - Hidenobu Sumioka; Kohei Nakajima; Kurima Sakai; Takashi Minato; Masahiro Shiomi (IROS, 2021)

Physical reservoir computing in a soft swimming robot. - Yuta Horii; Katsuma Inoue; Satoshi Nishikawa; Kohei Nakajima; Ryuma Niiyama; Yasuo Kuniyoshi (ALIFE, 2021)

Physics-informed reservoir computing with autonomously switching readouts: a case study in pneumatic artificial muscles. - Wentao Sun; Nozomi Akashi; Yasuo Kuniyoshi; Kohei Nakajima (MHS, 2021)

Object Recognition Using the Deformation Dynamics of Polyurethane Foam. - Yasumichi Wakao; Ryo Sakurai; Hajime Kitano; Kohei Nakajima (MHS, 2021)

Generalization Capability of Mixture Estimation Model for Peristaltic Continuous Mixing Conveyor. - Sana Oshino; Rie Nishihama; Kota Wakamatsu; Katsuma Inoue; Daisuke Matsui; Manabu Okui; Kohei Nakajima; Yasuo Kuniyoshi; Taro Nakamura 001 (IEEE Access, 2021)

Flapping-Wing Dynamics as a Natural Detector of Wind Direction. - Kazutoshi Tanaka; Shih-Hsin Yang; Yuji Tokudome; Yuna Minami; Yuyao Lu; Takayuki Arie; Seiji Akita; Kuniharu Takei; Kohei Nakajima (Adv. Intell. Syst., 2021)

Learning Temporal Quantum Tomography. - Quoc-Hoan Tran; Kohei Nakajima (CoRR, 2021)

Transient Chaos in BERT. - Katsuma Inoue; Soh Ohara; Yasuo Kuniyoshi; Kohei Nakajima (CoRR, 2021)

Algebraic approach towards the exploitation of "softness": the input-output equation for morphological computation. - Mizuka Komatsu; Takaharu Yaguchi; Kohei Nakajima (Int. J. Robotics Res., 2021)

Quantum Reservoir Computing: A Reservoir Approach Toward Quantum Machine Learning on Near-Term Quantum Devices. - Keisuke Fujii 002; Kohei Nakajima (Reservoir Computing, 2021)

Toward NMR Quantum Reservoir Computing. - Makoto Negoro; Kosuke Mitarai; Kohei Nakajima; Keisuke Fujii 004 (Reservoir Computing, 2021)

Reservoir Computing Based on Spintronics Technology. - Tomohiro Taniguchi; Sumito Tsunegi; Shinji Miwa; Keisuke Fujii 002; Hitoshi Kubota; Kohei Nakajima (Reservoir Computing, 2021)

Pre-training on physical dynamics enhances indirect sensing in recurrent neural networks. - Mitsuhiro Nishida; Ryo Sakurai; Yasumichi Wakao; Kohei Nakajima (MHS, 2022)

Echo state property and memory in octopus-inspired soft robotic arm. - Katsushi Kagaya; Bowei Yu; Yuna Minami; Kohei Nakajima (RoboSoft, 2022)

Self-Organization of Physics-Informed Mechanisms in Recurrent Neural Networks: A Case Study in Pneumatic Artificial Muscles. - Wentao Sun; Nozomi Akashi; Yasuo Kuniyoshi; Kohei Nakajima (RoboSoft, 2022)

A Coupled Spintronics Neuromorphic Approach for High-Performance Reservoir Computing. - Nozomi Akashi; Yasuo Kuniyoshi; Sumito Tsunegi; Tomohiro Taniguchi; Mitsuhiro Nishida; Ryo Sakurai; Yasumichi Wakao; Kenji Kawashima; Kohei Nakajima (Adv. Intell. Syst., 2022)

Self-Organization of Remote Reservoirs: Transferring Computation to Spatially Distant Locations. - Kazutoshi Tanaka; Yuji Tokudome; Yuna Minami; Satoko Honda; Toshiki Nakajima; Kuniharu Takei; Kohei Nakajima (Adv. Intell. Syst., 2022)

Physical Deep Learning with Biologically Plausible Training Method. - Mitsumasa Nakajima; Katsuma Inoue; Kenji Tanaka; Yasuo Kuniyoshi; Toshikazu Hashimoto; Kohei Nakajima (CoRR, 2022)

Composite FORCE learning of chaotic echo state networks for time-series prediction. - Yansong Li; Kai Hu; Kohei Nakajima; Yongping Pan 001 (CoRR, 2022)

Quantum Noise-Induced Reservoir Computing. - Tomoyuki Kubota; Yudai Suzuki; Shumpei Kobayashi; Quoc-Hoan Tran; Naoki Yamamoto; Kohei Nakajima (CoRR, 2022)

Quantum-Classical Hybrid Information Processing via a Single Quantum System. - Quoc-Hoan Tran; Sanjib Ghosh; Kohei Nakajima (CoRR, 2022)

Durable Pneumatic Artificial Muscles with Electric Conductivity for Reliable Physical Reservoir Computing. - Ryo Sakurai; Mitsuhiro Nishida; Taketomo Jo; Yasumichi Wakao; Kohei Nakajima (J. Robotics Mechatronics, 2022)

Special Issue on Science of Soft Robots. - Koichi Suzumori; Ryuma Niiyama; Kenjiro Fukuda; Kohei Nakajima (J. Robotics Mechatronics, 2022)

Performance of reservoir computing in a random network of single-walled carbon nanotubes complexed with polyoxometalate. - Megumi Akai-Kasaya; Yuki Takeshima; Shaohua Kan; Kohei Nakajima; Takahide Oya; Tetsuya Asai (Neuromorph. Comput. Eng., 2022)

Physics-Informed Recurrent Neural Networks for Soft Pneumatic Actuators. - Wentao Sun; Nozomi Akashi; Yasuo Kuniyoshi; Kohei Nakajima (IEEE Robotics Autom. Lett., 2022)

Continuum-Body-Pose Estimation From Partial Sensor Information Using Recurrent Neural Networks. - Kazutoshi Tanaka; Yuna Minami; Yuji Tokudome; Katsuma Inoue; Yasuo Kuniyoshi; Kohei Nakajima (IEEE Robotics Autom. Lett., 2022)

Behavioral Diversity Generated From Body-Environment Interactions in a Simulated Tensegrity Robot. - Ryo Terajima; Katsuma Inoue; Shogo Yonekura; Kohei Nakajima; Yasuo Kuniyoshi (IEEE Robotics Autom. Lett., 2022)

Densely Parallelized Photonic Tensor Processor on Hybrid Waveguide/Free-Space-Optics. - Mitsumasa Nakajima; Kenji Tanaka; Katsuma Inoue; Kohei Nakajima; Toshikazu Hashimoto (PSC, 2023)

Embedding bifurcations into pneumatic artificial muscle. - Nozomi Akashi; Yasuo Kuniyoshi; Taketomo Jo; Mitsuhiro Nishida; Ryo Sakurai; Yasumichi Wakao; Kohei Nakajima (CoRR, 2023)

Virtual reservoir acceleration for CPU and GPU: Case study for coupled spin-torque oscillator reservoir. - Thomas Geert de Jong; Nozomi Akashi; Tomohiro Taniguchi; Hirofumi Notsu; Kohei Nakajima (CoRR, 2023)

Generalized multiplicative stochastic processes arising from one-dimensional maps with noise. - Taichi Haruna; Kohei Nakajima (Artif. Life Robotics, 2023)

"RobOstrich" Manipulator: A Novel Mechanical Design and Control Based on the Anatomy and Behavior of an Ostrich Neck. - Kazashi Nakano; Megu Gunji; Masahiro Ikeda; Keung Or; Mitsuhito Ando; Katsuma Inoue; Hiromi Mochiyama; Kohei Nakajima; Ryuma Niiyama; Yasuo Kuniyoshi (IEEE Robotics Autom. Lett., 2023)

Information Processing Capacity of Spintronic Oscillator. - Sumito Tsunegi; Tomoyuki Kubota; Akira Kamimaki; Julie Grollier; Vincent Cros; Kay Yakushiji; Akio Fukushima; Shinji Yuasa; Hitoshi Kubota; Kohei Nakajima; Tomohiro Taniguchi (Adv. Intell. Syst., 2023)

Memory Regressor Extended Echo State Networks for Nonlinear Dynamics Modeling. - Kai Hu; Qian Wang 039; Tian Shi; Kohei Nakajima; Yongping Pan 001 (ECC, 2024)

Thermodynamic limit in learning period three. - Yuichiro Terasaki; Kohei Nakajima (CoRR, 2024)

Exploiting Chaotic Dynamics as Deep Neural Networks. - Shuhong Liu; Nozomi Akashi; Qingyao Huang; Yasuo Kuniyoshi; Kohei Nakajima (CoRR, 2024)

Designing Chaotic Attractors: A Semi-supervised Approach. - Tempei Kabayama; Yasuo Kuniyoshi; Kazuyuki Aihara; Kohei Nakajima (CoRR, 2024)

A Jellyfish Cyborg: Exploiting Natural Embodied Intelligence as Soft Robots. - Dai Owaki; Max Austin; Shuhei Ikeda; Kazuya Okuizumi; Kohei Nakajima (CoRR, 2024)

Informational Embodiment: Computational role of information structure in codes and robots. - Alexandre Pitti; Kohei Nakajima; Yasuo Kuniyoshi (CoRR, 2024)

How noise affects memory in linear recurrent networks. - JingChuan Guan; Tomoyuki Kubota; Yasuo Kuniyoshi; Kohei Nakajima (CoRR, 2024)

Training Spiking Neural Networks via Augmented Direct Feedback Alignment. - Yongbo Zhang; Katsuma Inoue; Mitsumasa Nakajima; Toshikazu Hashimoto; Yasuo Kuniyoshi; Kohei Nakajima (CoRR, 2024)

Reservoir Computing Generalized. - Tomoyuki Kubota; Yusuke Imai; Sumito Tsunegi; Kohei Nakajima (CoRR, 2024)

Harnessing omnipresent oscillator networks as computational resource. - Thomas Geert de Jong; Hirofumi Notsu; Kohei Nakajima (CoRR, 2025)

Backpropagation through Soft Body: Investigating Information Processing in Brain-Body Coupling Systems. - Hiroki Tomioka; Katsuma Inoue; Yasuo Kuniyoshi; Kohei Nakajima (CoRR, 2025)

Haptic Perception via the Dynamics of Flexible Body Inspired by an Ostrich's Neck. - Kazashi Nakano; Katsuma Inoue; Yasuo Kuniyoshi; Kohei Nakajima (CoRR, 2025)

Attractor-merging Crises and Intermittency in Reservoir Computing. - Tempei Kabayama; Motomasa Komuro; Yasuo Kuniyoshi; Kazuyuki Aihara; Kohei Nakajima (CoRR, 2025)

Multifunctional physical reservoir computing in soft tensegrity robots. - Ryo Terajima; Katsuma Inoue; Kohei Nakajima; Yasuo Kuniyoshi (CoRR, 2025)