Summary of Research Project Results Under the JSPS FY2000
"Research for the future Program"



1.Research Institution Keio University
 
2.Research Area Integrated Fields
 
3.Research Field Information for Life Systems
 
4.Term of Project FY1996〜FY2000
 
5.Project Number 96I00102
 
6.Title of Project Study of Information Systems of Lives in Physical Model Complex Systems

7.Projetct Leader
Name Institution,Department Title of Position
Kiyoshi Kawamura Faculty of Science and Technology Professor

8.Core Members

Names Institution,Department Title of Position
Fumiko Yonezawa Faculty of Science. & Tech., Keio Uni. Professor
Kotaro Oka Faculty of Science. & Tech., Keio Uni. Associate Professor
Yukio Saito Faculty of Science. & Tech., Keio Uni. Professor

9.Cooperating Researchers

Names Institution,Department Title of Position
Hiroshi Takano Faculty of Science. & Tech., Keio Uni. Associate Professor
Sohei Gomi Faculty of Hum. & Soc.Sci. Iwate Uni. Assistant
Uishi Iwasaki Faculty of Engineering, Ibaraki Uni. Assistant

10.Summary of Research Results

What we mention in our proposal were
(1) To make physical models on a computer, which model neuronal and genetic systems of a real life, function as lives. (2) To represent various experimental results in digital form and to study the relation between the structure of the above mentioned physical models and their biological functioning (3) To propose algorithm and electric circuits which imitate those of real lives
We have obtained the following results
(1) As for the above items 1 and 2, we have constructed a database of anatomical data of synaptic connectivity of C. eslegans, which was not only used by ourselves but also supplied to other researchers. (2) As for the above item 1, we represented the synaptic connectivity in a directed graph and found paths of neuronal signals from sensory neurons to motor neurons used for native responses of the worm. This implies that the graph functions as a life mentioned in the above item 1. (3) As for above item 3, we have found a network of registers which replace synapses of C. elegans could process as much information as the worm.

11.Key Words

(1)C. elegans、(2)Graph theory、(3)Neuronal network
(4)Native response、(5)Synaptic Connectivity、(6)Neurons
(7)Information Processing、(8)Electrical Circuit

12.References

[Reference Articles]
Author Title of Article
Yasuhiro Funabashi et al. Native Responses of C. elegans Encoded in Its Neuron Network
Journal Volume Year Pages Concerned
Journal of Physical Societies of Japan 70 2001 in press

Author Title of Article
Kiyoshi Kawamura et al. Does a Randomly Organized Electrical Circuit Function as a Neuronal System ?
Journal Volume Year Pages Concerned
Japanies Journal of Applied Physics 40 2001 2095〜2099

Author Title of Article
Hiroto Ogawa et al. Dendritic Calcium Accumulation Regulates Wind Sensitivity
Journal Volume Year Pages Concerned
Journal of Neurobiology 46 2001 301〜303

Author Title of Article
Hiroto Ogawa et al. Dendritic Ca2+ Transient Increase Evoked by Wind Stimulus
Journal Volume Year Pages Concerned
Neuroscience Letters 275 2000 61〜64

Author Title of Article
Katsumi Hagita et al Relaxation of Polymer Chain Confined in a Slit
Journal Volume Year Pages Concerned
Journal of the Physical Society of Japan 68 1999 2144〜2145

Author Title of Article
Satoru Morita Scaling Law for the Lyapnov Spectra in Globally Coupled Tent Map
Journal Volume Year Pages Concerned
Physical Review E 58 1998 4401〜4412

Author Title of Article
Ken-ichi Oshio Bifurcation and Chaos of Current Oscillations in Semiconductors
Journal Volume Year Pages Concerned
Journal of Physical Society of Japan 67 1998 2538-2545

Author Title of Article
Kotaro Oka et al. Physiological Basis of Earthworm Ventrol Nerve Cord
Journal Volume Year Pages Concerned
Bioimages 4 1996 149-156


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