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TEL/FAX 011-706-4439 / E-mail nami::math.sci.hokudai.ac.jp
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6·î24Æü(¶â)15¡§00¡Á¡¡Íý³ØÉô8¹æ´Û309¹ÖµÁ¼¼
Dr. Dmitry Nerukh
Unilever Centre for Molecular Informatics,
Department of Chemistry, Cambridge University
(Íý²½³Ø¸¦µæ½ê¥²¥Î¥à²Ê³ØÁí¹ç¸¦µæ¥»¥ó¥¿¡¼
³°¹ñ¿ÍµÒ°÷¸¦µæ°÷(JSPS))
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Dynamic complexity of protein folding: computational mechanics
on classical molecular trajectories
¥¢¥Ö¥¹¥È¥é¥¯¥È:
An elementary event of protein folding - the beta-turn formation - in a
Leu-enkephalin molecule is investigated. Classical MD of the peptide in
explicit water is used to simulate the trajectories of the system¡Çs
atoms. They are then analysed using the computational mechanics [1]
approach in order to discover the dynamic structure at the moment of
turn formation. It is found that all the peptide¡Çs atoms as well as
the majority of the waters of the first solvation shell exhibit a drop
in dynamic complexity exactly at the moment of the transition. The
complexity measure used in this study quantify the degree of chaoticity
of the system¡Çs trajectories, the more chaotic corresponding to a
higher value of complexity. Transition dynamics theory suggests that
chaotic dynamics can become quasi-regular at the moment of barrier
crossing [2]. Thus our results present the first evidence supporting
this general hypothesis for realistic high-dimensional molecular
systems.
-
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060-0810 »¥ËÚ»ÔË̶èËÌ10¾òÀ¾8ÃúÌÜ ËÌÂçÍý³ØÉô¿ô³Ø¶µ¼¼ ¹ÔÌÚ¹§É×
TEL/FAX 011-706-4439 / E-mail nami::math.sci.hokudai.ac.jp
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Hans H. Diebner
¡¡¡ÊCenter for Art and Media, Karlsruhe, Germany¡Ë
¥¿¥¤¥È¥ë¡§
On the role of arts and hermeneutics in complex systems research (II)
¥¢¥Ö¥¹¥È¥é¥¯¥È¡§
In this second part of the conference the relationship of system theory and
hermeneutics will be deepend. The review of some concrete technical
examples presented in the first part led to a criticism with respect to
the ambitious goal of artificial intelligent systems to mimick human
cognitive capabilities and to assist humans in cognitive tasks.
Indications for shortcomings with respect to this bold desires had been
given and some dangerous aspects like the "predjudice confirming
machanisms" that enslaves the users which can be interpreted as
Heidegger's reification tendency ("Verdinglichungstendenz") of technics
have been discussed. Despite this criticism there is a clear affinity of
Heidegger's fundamental ontology and system theory as has been promoted by
Niklas Luhmann within philosophy. In recent years however, also within the
siences an approch towards hermeneutics can be observed. This is mainly
due the encounter with selfreferentiality in system theory leading to
similar problems of "being-in-the-world" or being "endo". Although this
second part of the conference will be naturally somewhat more abstract and
philsophical casual references to concrete technical examples are given
with a slight redundancy to the first part so that new attandents should
be able to follow the crucial points of the talk.
-
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TEL/FAX 011-706-4439 / E-mail nami::math.sci.hokudai.ac.jp
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Hans H. Diebner
¡¡¡ÊCenter for Art and Media, Karlsruhe, Germany¡Ë
¥¿¥¤¥È¥ë¡§
On the role of arts and hermeneutics in complex systems research (II)
¥¢¥Ö¥¹¥È¥é¥¯¥È¡§
In this second part of the conference the relationship of system theory and
hermeneutics will be deepend. The review of some concrete technical
examples presented in the first part led to a criticism with respect to
the ambitious goal of artificial intelligent systems to mimick human
cognitive capabilities and to assist humans in cognitive tasks.
Indications for shortcomings with respect to this bold desires had been
given and some dangerous aspects like the "predjudice confirming
machanisms" that enslaves the users which can be interpreted as
Heidegger's reification tendency ("Verdinglichungstendenz") of technics
have been discussed. Despite this criticism there is a clear affinity of
Heidegger's fundamental ontology and system theory as has been promoted by
Niklas Luhmann within philosophy. In recent years however, also within the
siences an approch towards hermeneutics can be observed. This is mainly
due the encounter with selfreferentiality in system theory leading to
similar problems of "being-in-the-world" or being "endo". Although this
second part of the conference will be naturally somewhat more abstract and
philsophical casual references to concrete technical examples are given
with a slight redundancy to the first part so that new attandents should
be able to follow the crucial points of the talk.
-
Ê£»¨·Ï¥»¥ß¥Ê¡¼Ï¢ÍíÀè
060-0810 »¥ËÚ»ÔË̶èËÌ10¾òÀ¾8ÃúÌÜ ËÌÂçÍý³ØÉô¿ô³Ø¶µ¼¼ ¹ÔÌÚ¹§É×
TEL/FAX 011-706-4439 / E-mail nami::math.sci.hokudai.ac.jp
Ê£»¨·Ï¥»¥ß¥Ê¡¼¤Î¤ªÃΤ餻¡£
2·î9Æü¡Ê¿å¡Ë15¡§00¡Á16¡§30¡¡Íý³ØÉô8¹æ´Û309¹ÖµÁ¼¼
Hans H. Diebner
¡¡¡ÊCenter for Art and Media, Karlsruhe, Germany¡Ë
¥¿¥¤¥È¥ë¡§
On the role of arts and hermeneutics in complex systems research (I)
¥¢¥Ö¥¹¥È¥é¥¯¥È¡§
This first of a two-part conference is devoted to a summary of my
investigations of complex systems that gradually forced me to scrutinize
pure system theoretical methods and to flirt with artistic procedures. It
ended up so far in an attempt to fertilize complex systems research with
"philosophical hermeneutics". Four concrete project examples are given.
Firstly, the scheme of an adaptive cognitive system is presented. The
system contains dynamical moduls that allow to anticipate the future and
to simulate aspects of the external world. An attempt to endow simulated
agents with the system failed so far due to the overwhelming computational
time consumption.
Both, the adaptive system and the following second example, the
"EyeVisionBot", have been stimulated by my previous experience in medical
biometry where I became acquainted with the Bayesian inference principle
extensively used in diagnostics. The Bayesian approach relies on
subjective probabilities and describes the update of "a priori" to "a
posteriori" knowledge. This comes close to a formalization of the
hermeneutic circle. EyeVisonBot is an eye-tracking-based image retrieval
interface applied to data bases or the internet that allows for the
anticipation of the desired picture category derived from previous viewing
behavior. The ambitious goal has been defined to mimick the hermeneutic
circle in form of an adaptive classification of data bases. A comparison
with the conception of evidence based medicine is given. The EyeVisonBot
acutely challenged my thinking of being able to externalize the human way
of understanding the world. The intimidating point of such adaptive tools
is that they have the potentiality for representing an enslaving prejudice
confirming machinery.
A third example, the "AI-Arena", a simulation of bots endowed with
strategies builds on the capacity of the public to contribute to research.
The user can create his/her own bot and endow it with an arbitrary
strategy. The cooperative behavior is studied by observing the user of the
simulation with respect to his/her choice of strategies and his/her
reaction to its effect in the simulation. This is an ever-open,
process-based approach to understand the human being.
The fourth example is to introduce a performative approach to the
understanding of complex systems. The better a complex system approximates
aspects of life the more mathematics loses grip to analyze them.
Performative approaches pave their way. This indicates a tendency towards
hermeneutics which is topic of the second part of this conference.
-
Ê£»¨·Ï¥»¥ß¥Ê¡¼Ï¢ÍíÀè
060-0810 »¥ËÚ»ÔË̶èËÌ10¾òÀ¾8ÃúÌÜ ËÌÂçÍý³ØÉô¿ô³Ø¶µ¼¼ ¹ÔÌÚ¹§É×
TEL/FAX 011-706-4439 / E-mail nami::math.sci.hokudai.ac.jp
Ê£»¨·Ï¥»¥ß¥Ê¡¼¤Î¤ªÃΤ餻¡£
2·î9Æü¡Ê¿å¡Ë15¡§00¡Á16¡§30¡¡Íý³ØÉô8¹æ´Û309¹ÖµÁ¼¼
Hans H. Diebner
¡¡¡ÊCenter for Art and Media, Karlsruhe, Germany¡Ë
¥¿¥¤¥È¥ë¡§
On the role of arts and hermeneutics in complex systems research (I)
¥¢¥Ö¥¹¥È¥é¥¯¥È¡§
This first of a two-part conference is devoted to a summary of my
investigations of complex systems that gradually forced me to scrutinize
pure system theoretical methods and to flirt with artistic procedures. It
ended up so far in an attempt to fertilize complex systems research with
"philosophical hermeneutics". Four concrete project examples are given.
Firstly, the scheme of an adaptive cognitive system is presented. The
system contains dynamical moduls that allow to anticipate the future and
to simulate aspects of the external world. An attempt to endow simulated
agents with the system failed so far due to the overwhelming computational
time consumption.
Both, the adaptive system and the following second example, the
"EyeVisionBot", have been stimulated by my previous experience in medical
biometry where I became acquainted with the Bayesian inference principle
extensively used in diagnostics. The Bayesian approach relies on
subjective probabilities and describes the update of "a priori" to "a
posteriori" knowledge. This comes close to a formalization of the
hermeneutic circle. EyeVisonBot is an eye-tracking-based image retrieval
interface applied to data bases or the internet that allows for the
anticipation of the desired picture category derived from previous viewing
behavior. The ambitious goal has been defined to mimick the hermeneutic
circle in form of an adaptive classification of data bases. A comparison
with the conception of evidence based medicine is given. The EyeVisonBot
acutely challenged my thinking of being able to externalize the human way
of understanding the world. The intimidating point of such adaptive tools
is that they have the potentiality for representing an enslaving prejudice
confirming machinery.
A third example, the "AI-Arena", a simulation of bots endowed with
strategies builds on the capacity of the public to contribute to research.
The user can create his/her own bot and endow it with an arbitrary
strategy. The cooperative behavior is studied by observing the user of the
simulation with respect to his/her choice of strategies and his/her
reaction to its effect in the simulation. This is an ever-open,
process-based approach to understand the human being.
The fourth example is to introduce a performative approach to the
understanding of complex systems. The better a complex system approximates
aspects of life the more mathematics loses grip to analyze them.
Performative approaches pave their way. This indicates a tendency towards
hermeneutics which is topic of the second part of this conference.
-
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TEL/FAX 011-706-4439 / E-mail nami::math.sci.hokudai.ac.jp
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Professor George Kampis (Etovos-Roland University, Budapest, Hungary)
"Hypercompetition and Evolution"
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Darwinian evolution is often characterized as a process of
competition. Ordinary competition is resulting from differences in
reproductive rates, i.e. constants of a linear differential
equation. Hypercompetion is defined, on the other hand, as higher
order competition, which arises in quadratic or other
density-dependent equations, leading to runaway processes.
The resulting hyperbolic growth is familiar from Hypercyles and
replicator dynamics, for instance. I discuss the hidden presence and
the relevance of hypercompetition in a wide class of evolutionary
phenonema such as various growth processes and agent-based
evolutionary simulations where it arises as a result of mass action.
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Peter Erdi (Center for Complex System Studies, Kalamazoo College)
Neural Networks, Brain Rhythms and Computational Neuropharmacology
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Prof.Yakov B. Pesin,
Thermodynamics of Unimodal Maps
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This includes the variational principle of statistical physics for this
maps, existence, and uniqueness of equilibrium (Gibbs) states. This is
one of the very few examples of non-uniformly hyperbolic systems for
which the thermodynamical formalism can be established. It allows one
to construct many meaningful invariant measures for unimodal maps other
then the well-known absolutely continuous one.
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Professor George Kampis (Etovos-Roland University, Budapest, Hungary)
"Hypercompetition and Evolution"
Abstract:
Darwinian evolution is often characterized as a process of
competition. Ordinary competition is resulting from differences in
reproductive rates, i.e. constants of a linear differential
equation. Hypercompetion is defined, on the other hand,as higher order
competition, which arises in quadratic or other density-dependent
equations, leading to runaway processes. The resulting hyperbolic
growth is familiar from Hypercyles and replicator dynamics, for
instance. I discuss the hidden presence and the relevance of
hypercompetition in a wide class of evolutionary phenonema such as
various growth processes and agent-based
evolutionary simulations where it arises as a result of mass action.
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"The half century of entropy: the most glorious number in dynamics"
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Coherent motion is found to emerge out of fluctuations
in a vibrated asymmetric particle. Depending on the
parameters, amplitude, and frequency of the box,
the motion of the particle is classified into several
phases. The transition between fluctuating motion and
unidirectional motion occurs with constant acceleration
in the low-frequency regime and constant amplitude
in the high-frequency regime. We show through dimensional
analysis that this behavior does not depend
on the detailed geometry of the particle.
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Cees van Leeuwen (RIKEN & University of Sunderland, UK)
A "Complex Systems" Approach to Perceptual Dynamics
Antonino Raffone (University of Sunderland, UK)
Spike timing-dependent neural coding and plasticity in the visual
system: neural mechanisms for perceptual grouping, priming and
short-term memory
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Cees van Leeuwen (RIKEN & University of Sunderland, UK)
(title to be announced)
Antonino Raffone (University of Sunderland, UK)
"Spike timing-dependent neural coding and plasticity in the visual
system: neural mechanisms for perceptual grouping, priming and
short-term memory"
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Abstract:
In this talk, we study mathematical models which show
both phase transitions and subexponential decay of correlations.
For this purpose, we introduce a new class of potentials
and a weak notion of Bowen's Gibbs measures.
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¹Ö±é¼Ô¡§¡¡Dr. Luc Berthouze¡¡¡ÊÅŻҵ»½ÑÁí¹ç¸¦µæ½ê¡Ë
±éÂê¡§¡¡About Sensorimotor Categories
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and its connection to observation processes"
¹Ö±é¼Ô: Dr. Hans Diebner »á¡Ê¥«¡¼¥ë¥¹¥ë¡¼¥¨·Ý½Ñ¹©²Ê¸¦µæ½ê)
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±éÂê: Neurodynamics: some mathematical frameworks
¹Ö±é¼Ô: Prof. Peter Erdi (Dept. Biophyiscis, KFKI Res. Inst. for
Particle and Nuclear Physics of the Hungarian Academy of Sciences,
Budapest, Hungary)
Short Abstract:
The theory of dynamical system offers conceptual and
mathematical tools for describing the performance of neural systems
at very different levels. The scope and limits of several strategies are
discussed.
0. Modeling Strategies
1. Hierarchy of dynamics
2. Single-cell models: the compartmental technique
3. Networks and dynamics
4. Computation with attractors
5. Statistical neurodynamics
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ÂêÌÜ: RNA À¤³¦¤Î¿Ê²½²áÄø: evolution to complexity on an RNA world
¹Ö±é¼Ô: »³ËÜ Ãι¬ (Ë̳¤Æ»Âç³ØÍý³Ø¸¦µæ²Ê)
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A spatially resolved model of RNA world is studied, where primer induced
replication, concatenation and random cutting are considered. The
increase of diversity of sequences and complexity of shapes are
observed; A hierarchically orgnized ``replication network'' is formed,
and evolution to long sequences and assembly of further long sequences
are obtained through it. These results suggest a scenario for
overcoming the error threshold and for the evolution of enzymatic
activity.
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°ÆÆâ¤ÎºÇ¿·ÈÇ¡§"http://fcs.math.sci.hokudai.ac.jp/kaken/993program.html"
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**************** Utsurohi-yukumono ******************
Date: Jan.25 - Jan.26, 1999
Place: Shinkin-Kempo Kaikan
North 9 West 3, Kita-ku, Sapporo
(Located to the north of Sapporo station)
TEL: 011-737-6741
Organizers: Ichiro Tsuda (Hokkaido Univ.)
Yasumasa Nishiura (Hokkaido Univ.)
################# Jan.25 ##################
10:00 - 11:00
Shui-Nee Chow (Univ. of Singapore)
Title to be announced.
11:15 - 12:15
Some Comments on Chaotic Itinerancy,
Ichiro Tsuda (Hokkaido Univ.)
Lunch
14:00 - 15:00
Beyond attractors,
Kunihiko Kaneko (Univ. of Tokyo)
15:15 - 16:15
Chaotic Itinerancy of Globally Coupled Map,
Motomasa Komuro (Teikyo Univ.)
Break
16:45 - 17:45
Self-replication and self-destruction in dissipative systems,
Yasumasa Nishiura (Hokkaido Univ.)
18:30 - WELCOME PARTY
################# Jan.26 #######################
10:00 - 11:00
Universal algebraic relaxation of pulled fronts propagating into
unstable states,
Wim van Saarloos (Leiden University)
11:15 - 12:15
Turing instabilities, and their interaction with large fronts,
Bjorn Sandstede (Univ. of Ohio)
Lunch
14:00 - 15:00
Network of heteroclinic orbits in game-dynamics equation systems,
Tsuyoshi Chawanya (Osaka Univ.)
15:15 - 16:15
Sierpinski Gasket in a Reaction-Diffusion System,
Yumino Hayase (Ocyanomizu Univ.)
Break
16:45 - 17:45
A 2D flapping-flight model and the breakdown of dynamical symmetry,
Makoto Iima (Univ. of Hokkaido)
*************************************************************************
For correspondence and information,
Yasumasa Nishiura
E-mail: nishiura::aurora.es.hokudai.ac.jp
(except 12/14-12/22, 1998)
TEL: 011-706-3357 FAX: 011-706-4966
!!!During 12/14 - 12/17, 1998 !!!, please contact with
Ichiro Tsuda
E-mail: tsuda::math.sci.hokudai.ac.jp
TEL: 011-706-3824 FAX: 011-706-3824
Ê£»¨·Ï¥»¥ß¥Ê¡¼¤Î¤ªÃΤ餻¡£
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±éÂê: Evolving "Metazoan" Development:
evolutionary novelty and regulatory genes
¹Ö±é¼Ô: Roeland Merks
(Dept. of Pure and Applied Sciences, University of Tokyo)
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evolutionary novelty and regulatory genes
¹Ö±é¼Ô: Roeland Merks
(Dept. of Pure and Applied Sciences, University of Tokyo)
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evolutionary novelty and regulatory genes
¹Ö±é¼Ô: Roeland Merks
(Dept. of Pure and Applied Sciences, University of Tokyo)
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Êó¹ð¼Ô Klaus Mainzer ( University of Ausburg, BRD )
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¾ì½ê: 3-512(ËÌÂçÍý³ØÉô¿ô³Ø¶µ¼¼3¹æ´Û)
±éÂê: A Statistical Approach to Neural Population Dynamics.
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