Hiroaki Wagatsuma

J-GLOBAL         Last updated: Sep 27, 2013 at 14:52
Hiroaki Wagatsuma
Kyushu Institute of Technology
Graduate School of Life Science and Systems Engineering(Master's and Doctoral Programs) Brain Science and Engineering
Job title
Associate Professor
Twitter ID
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Academic & Professional Experience

Oct 2009
Associate Professor, Kyushu Institute of Technology
Oct 2009
Mar 2012
Apr 2003
Sep 2009
Research Scientist, RIKEN BSI

Published Papers

Hiroaki Wagatsuma
Computer Software   28(1) 2-20   Jan 2011   [Refereed]
In computer science, parallel and distributed processing has long been investigated and developed for its applications to social infrastructures. Nowadays, it enhances growing rate of Internet access around the world, which makes a shared knowledg...
Tomonaga Y, Wagatsuma H
ICIC Express Letters   5(9B) 3477-3482   2011   [Refereed]
Biologically-inspired robots have been investigated to reproduce biological intelligent behaviors and interest in this topic extends to the reconstruction of a central controller that is similar to the brain. However the brain is a complex system ...
Ono K, Wagatsuma H
ICIC Express Letters   5(10) 3907-3912   2011   [Refereed]
Biological adaptive behavior provides a good model for the design of intelligent autonomous transporters. Recently, car companies have been working to develop a collision-avoidance system. This system uses sensors that send and receive signals fro...
The Brain & Neural Networks   16(4) 184-189   Dec 2009   [Refereed]
Wagatsuma H
Lecture Notes in Computer Science   5506 119-126   2009   [Refereed]
One of most important concepts in robotics and artificial intelligence is the embodied approach, focusing on the importance of having a body that functionally connects to the external world. This setup suggests that the intelligence develops throu...
Wagatsuma H, Yamaguchi Y
Lecture Notes in Computer Science   5506 857-864   2009   [Refereed]
The brain is capable of parallel processing of different types of information in different brain regions. However, for higher cognitive functions such as decision-making, such regionally distributed information must interact together in the proper...
Wagatsuma H
Lecture Notes in Computer Science   5506 1082-1089   2009   [Refereed]
In biological systems, internal microorganisms adaptively survive but often serve necessary functions to the host, such as energy production by mitochondria as symbiosis. On the other hand, malignant germs have a parasitic relationship with the ho...
Yamaguchi Y, Molter C, Wu Z, Agashe HA, Wagatsuma H
Lecture Notes in Computer Science   4984 151-159   2008   [Refereed]
This paper proposes a computational model of spatio-temporal property formation in the entorhinal neurons recently known as “grid cells”. The model consists of module structures for local path integration, multiple sensory integration and for thet...
Colliaux D, Yamaguchi Y, Molter C, Wagatsuma H
Lecture Notes in Computer Science   4984 160-169   2008   [Refereed]
A phenomenological model is developed where complex dynamics are the correlate of spatio-temporal memories. If resting is not a classical fixed point attractor but a Milnor attractor, multiple oscillations appear in the dynamics of a coupled syste...
Wagatsuma H, Yamaguchi Y
Lecture Notes in Computer Science   4985 177-184   2008   [Refereed]
The real world changes in space over time. Our brains need real-time interaction with the external world and will update various internal representations even when events happen only one-time. Such one-time experiences are evaluated in relation to...
Wagatsuma H, Yamaguchi Y
Cognitive neurodynamics   1(2) 119-141   Jun 2007   [Refereed]
The rodent hippocampus has been thought to represent the spatial environment as a cognitive map. In the classical theory, the cognitive map has been explained as a consequence of the fact that different spatial regions are assigned to different ce...
Yamaguchi Y, Sato N, Wagatsuma H, Wu Z, Molter C, Aota Y
Current opinion in neurobiology   17(2) 197-204   Apr 2007   [Refereed]
The discovery of theta-rhythm-dependent firing of rodent hippocampal neurons highlighted the functional significance of temporal encoding in hippocampal memory. However, earlier theoretical studies on this topic seem divergent and experimental imp...
Wagatsuma H, Yamaguchi Y
Neurocomputing   69(10-12) 1228-1232   Jun 2006   [Refereed]
It is an open question whether the hippocampal cognitive map is useful for navigation with ambiguity in space representation. The hippocampus might need to assign different contexts to cell populations in the same place, according to the tradition...
The Brain & Neural Networks   12(1) 17-31   Mar 2005   [Refereed]
In spatial alternation tasks, the same place in different behavioral sequences is represented by different neurons in the rat hippocampus. This indicates that associative memory in the brain solves the memory interference problem at each instance....
Wagatsuma H, Yamaguchi Y
Neural computation   16(12) 2665-2697   Dec 2004   [Refereed]
The rodent hippocampus has been thought to represent the spatial environment as a cognitive map. The associative connections in the hippocampus imply that a neural entity represents the map as a geometrical network of hippocampal cells in terms of...
Yamaguchi Y, Aota Y, Sato N, Wagatsuma H, Wu Z
Journal of integrative neuroscience   3 143-157   Jun 2004   [Refereed]
Rat hippocampal cells exhibit characteristic phase-dependent firings when oscillation in frequency range around 8Hz is present. Based on the hypothesis that theta phase coding is generated by synchronization of neural activities, an autoassociativ...
Browne W, Kawamura K, Krichmar J, Harwin W, Wagatsuma H
IEEE Robotics and Automation Magazine   16(3) 17-18   2009   [Refereed]
Some articles in this special issue on cognitive robotics focus on replicating human and animal behaviors in robots, while others look into using robotic analogs of the brain to provide insight into the neuroscience.


Churchill Elizabeth F., Wagatsuma Hiroaki
Journal of Japanese Society for Artificial Intelligence   28(3) 439-443   May 2013
Yamakawa Hiroshi, Wagatsuma Hiroaki, Yoshida Michiko
Journal of Japanese Society for Artificial Intelligence   28(3) 424-426   May 2013
我妻 広明
人工知能学会誌   28(1)    Jan 2013
ONO Kosuke, WAGATSUMA Hiroaki
IEICE technical report. Neurocomputing   111(241) 41-46   Oct 2011
Many of the vehicle robots using the sensors, they drive avoid collision with obstacle to get outside information on real-time. However, they are considering the information ahead of present location when the majority of drivers drive a car. Becau...
IEICE technical report. Neurocomputing   111(241) 59-64   Oct 2011
In this study, to develop a support equipment for rehabilitation of children with cerebral palsy. Incorporating the concept of cognitive exercise that focus on brain plasticity, to associate the movement and perception. Fusing the knowledge of bra...
SONE Masafumi, WAGATSUMA Hiroaki
IEICE technical report. Neurocomputing   111(241) 71-76   Oct 2011
Flexibility and quickness of biological muscles is of interest in recent robotics. We attempt to reproduce an artificial muscle based on elastic-plastic materials and investigate rebound characteristics in a S-shaped structure. Experimental result...
IEICE technical report. Neurocomputing   111(241) 77-82   Oct 2011
Since ancient times the wheels have been used to transport heavy loads. In addition, Crawler has been used in rough terrain. On the other hand, organisms are often moved by the feet and repeat the basic dynamics of muscle contraction. Leg's moveme...
IEICE technical report. Neurocomputing   111(241) 143-148   Oct 2011
Biologically-inspired robots have been studied on biological intelligence that provides complex behaviors. Humanoid robot is a trend to investigate how the human body works such as bipedal walking, but we focus on on-demand planning and rescheduli...
The Brain & neural networks   18(2) 106-106   Jun 2011
コンピュータソフトウェア   28(1) 2-20   Jan 2011
IEICE technical report. Neurocomputing   110(246) 17-22   Oct 2010
The brain is capable of various cognitive functions in perception and action, and the functions appear in a system-environmental loop, through the brain, body and environment. In studies of the robotics and artificial intelligence, the notion of t...
平井 有三, 甘利 俊一, 福島 邦彦, 我妻 広明, 山崎 匡, 岡田 真人, 小池 康晴
日本神経回路学会誌 = The Brain & neural networks   17(1) 12-23   Mar 2010
Wagatsuma H., Yamaguchi Y.
Biophysics   44(1)    Nov 2004
IEICE technical report. Neurocomputing   101(735) 243-249   Mar 2002
In spatial tasks, hippocampal neuronal activity not only show the location-specific firing, but also reflects the movement related firing. Eichenbaum et al.(1999) proposed the hypothesis that different types of the hippocampal activation occur in ...
Wagatsuma Hiroaki, Yamaguchi Yoko
IEICE technical report. Neurocomputing   99(685) 43-50   Mar 2000
In the rat hippocampus, the cognitive map has been considered to be represented by place cells. The recent report on "theta phase precession" shows that the firing of place cells is found as characteristic phase relations on theta cycles. In the p...
Wagatsuma Hiroaki, Yamaguchi Yoko
IEICE technical report. Neurocomputing   97(623) 55-62   Mar 1998
The neural network analyzed in this paper consists of phase oscillators. They are mutually coupled by pulse density as a threshold output. The network is known to have either point attractors or limit cycle attractors. The present paper is focused...

Books etc

Neuromorphic and Brain-Based Robot
Krichmar J, Wagatsuma H (Part:Editor)
Cambridge University Press   Sep 2011   ISBN:0521768780
Neuromorphic and brain-based robotics have enormous potential for furthering our understanding of the brain. By embodying models of the brain on robotic platforms, researchers can investigate the roots of biological intelligence and work towards t...
Information Extraction from the Internet
Nan Tang (Part:Joint Work, Chap. 3: Web Agent Design Based on Computational Memory and Brain Research / Maya Dimitrova & Hiroaki Wagatsuma)
iConcept Press Ltd.   Aug 2011   ISBN:1463743998
As the Internet continues to become part of our lives, there now exists an overabundance of reliable information sources on this medium. The temporal and cognitive resources of human beings, however, do not change. "Information Extraction from the...

Research Grants & Projects

Project Year: Dec 2012 - Jul 2012    Investigator(s): Hiroaki Wagatsuma