From: rick@cs.arizona.edu (Rick Schlichting)
Newsgroups: comp.research.japan
Subject: Kahaner Report: Research Inst of Mathematics (RIMS) workshops, 1992
Date: 15 Dec 92 19:52:53 GMT


  [Dr. David Kahaner is a numerical analyst on sabbatical to the 
   Office of Naval Research-Asia (ONR Asia) in Tokyo from NIST.  The 
   following is the professional opinion of David Kahaner and in no 
   way has the blessing of the US Government or any agency of it.  All 
   information is dated and of limited life time.  This disclaimer should 
   be noted on ANY attribution.]

  [Copies of previous reports written by Kahaner can be obtained using
   anonymous FTP from host cs.arizona.edu, directory japan/kahaner.reports.]

To: Distribution
From: 
 David K. Kahaner
 US Office of Naval Research Asia
 (From outside US):  23-17, 7-chome, Roppongi, Minato-ku, Tokyo 106 Japan
 (From within  US):  Unit 45002, APO AP 96337-0007
  Tel: +81 3 3401-8924, Fax: +81 3 3403-9670
  Email: kahaner@cs.titech.ac.jp
Re: Research Inst of Mathematics (RIMS) workshops, Kyoto Japan, 1992
15 Dec 1992
This file is named "rims.92"

ABSTRACT. Summaries & titles of several workshops sponsored Kyoto University's
Research Institute of Mathematics (RIMS), 1992.

The summary below was provide by
	Dr. Mei Kobayashi
	IBM Japan Ltd
	5-19 Sanbancho Chiyoda-ku Tokyo 102 Japan
	 Tel: 81+3-3228-8287, Fax: 81+3-3265-4251
	 Email: MEI@TRLVM.VNET.IBM.COM

Following Dr Kobayashi's summary are the titles of several other RIMS workshops
(on fluids and dynamics).



    Workshop on the Theory and Application of Numerical Methods
                  Kyoto U. RIMS, Nov. 4-6, 1992

                  Organizer: Masao Iri, Tokyo U.
               Footman: Kazuo Murota, Kyoto U. RIMS

Following the fine Japapanese tradition of organizational precision,
the Workshop on Numerical Methods at Kyoto U. RIMS, Nov 4-6, 1992
began precisely at 13:30. The program consisted of seven 40-60
minute invited talks by senior researchers and thirteen 30-minute
talks by their younger colleagues. Unfortunately ( or fortunately )
submitted abstracts were subjected to refereeing since only a limited
number of spaces were available. There was only one minor program
change: Igarashi's talk was interchanged that that of Tado and Ono on
the final afternoon. Since a formal write-up of the talks will be
published as part of the Kyoto U. RIMS Kokyuu Roku Series next year,
I will try to comment only on those aspects of the presentations
which may not appear in the proceedings.

This reporter would like to apologize in advance for any errors,
mistranslations, etc. which are due to her poor Japanese and
mathematical background rather than intentional malice.
Dr. Shaoliang Zhang ( formerly with the Institute of Computational
Fluid Dynamics ) kindly corrected a misspelling of his name from
last year's report. I think his ( Chinese name ) was pronounced using
the Japanese-way of reading Chinese characters and was then
phoenetically translated into English. Unfortunately, he tells me that
most of his recent mail uses my "new" version of his name. I regret
the error and appreciate his understanding and forgiveness.

Iri kicked off the talks in with a nice, informal talk which set
the tone for the remainder of the meeting. The sixty minute essay
discussed his thoughts and advice on the interplay between numerical
analysis and other disciplines. Some of his words of advice included:

(1) the importance of developing a well-rounded scientific and
mathematical background in order to practice good numerical analysis.
An understanding of the scientific modelling process is needed before
numerical techniques can be applied, e.g. Vornoi Diagrams and
computational geometry rely heavily on topolgy, Gershgorin's Theorem is
used extensively in numerical analysis, statistics and related
mathematical theory are needed in statistical computing.

(2) the need for caution when using automatic programs for graphing.
The scaling must be the same on all graphs before comparisons are made;
automatic tools often set scales according to the max or min of a
a particular graph. Excessive labelling, cluttered charts and busy
diagrams are sometimes produced when using the default options.

(3) the importance of increasing exchange, cooperation and understanding
between Japanese and overseas scientists. There is a perception that
Japanese currently "take" more technology and ideas than they "give".
If this percepton is not changed as Japan becomes a greater economic and
technological power, greater friction will undoubtedly arise.  Prof.
Iri's talk was inspirational as well as educational and was attended by
distinguished professors from other disciplines, including Kawai of
Mathematical Physics.

I assume the content of the other speakers on Wed. will appear in
detail in the proceedings. 

Paper Available from Yutaka YOSHIDA:
"On the convergence of iteration methods for finite element nonlinear analysis" 
Tokyo Institute of Technology, Dept. Engineering
2-12-1 Ookayama, Meguro-ku Tokyo 152 Japan.

Abstract: Nonlinear problems in finite element equations are generally
solved by iteration methods and the analysis of a large finite element
nonlinear system is a great expense to carry. Each iteration in the
orthodox Newton-Raphson method requires the computation and assembly of
the tangent stiffness matrix at the current state followed by solution
of the linear system. In the modified N-R method, the same tangent
matrix can be used throughout the increment but it suffers the
disadvantage of a slower convergence rate. A number of procedures have
been advocated for the acceleration of the modified approach. In this
paper, a group of competing algorithms are evaluated in reference to the
required number of iterations and the computer time.  So much depends on
the choice of problem and its size, as well as the error tolerance, that
the experiments can only be a modest beginning for judgement. Key Words:
Newton-Raphson method, BFGS method, Secant relationship, Finite element
nonlinear analysis.

On Thursday Suda, a young researcher from the Info. Sciences
Dept. of Tokyo U., started off the day's talks. I have found him to
be a consistently well-prepared, clear and excellent speaker at
all workshops. Address for invited speaker DR. Tatsuoki TAKEDA:
Director, Plasma Theory Laboratory, Dept. of Fusion Plasma Research
Japan Atomic Energy Research Institute (JAERI), Naka-machi, Naka-gun,
Ibaraki-ken 311-01 Japan. Zhang recently quit his job at the Institute
of Computational Fluid Dynamics (iCFD), founded by Prof. Kuwahara
and others. Zhang and Fujino's papers can be obtained by writing to
Fujino, who is still at iCFD: 1-22-3 Haramachi, Meguro-ku,
Tokyo 152 Japan, FAX: 81+3-3714-6230.

Interstingly, Yamamoto chose not to discuss specifics of his own
distinguished research, but rather to give a report on recent
international conferences and trends which he feels will be important
in numerical mathematics. Yamamoto closed the day's session with the
announcement that he will be the workshop organizer in 1993.
In typical Japanese style, he asked the audience for help and
cooperation to continue a fine and successful tradition of academic
exchange friendship.

On Thursday evening a reception was held to celebrate the 60th Birthday
of Prof. Iri. In Japan when a 60th birthday party is held within a
family, the birthday boy must wear a red sweater or vest. There is also
a tradition of holding a party to honor the 60th birthdays for
professors, especially for Tokyo Univ. faculty since they have reached
the retirement age. As in the U.S., a collection is taken from close
friends and associates to buy a special gift.  Although a gold watch is
a traditional American gift, there is no particular traditional gift
item in Japan. Recently, some birthday boys have even received high-tech
word processors and modern toys.

Asai, a young master's degree candidate from Tsukuba U. led the final
day's talks. An extensive write-up ( in English ) can be obtained by
writing to: Prof. Y. Ikebe, Inst. for Info. Sciences and Electronics, U.
of Tsukuba, Tsukuba Science City, Ibaraki 305 Japan.  Email:
ikebe@is.tsukuba.ac.jp 

For information about Kobayashi's talk please write to: Mei Kobayashi (
please include full first name ) IBM Japan, 5-19 Sanbancho Chiyoda-ku
Tokyo 102 Japan. Email: mei@trlvm.vnet.ibm.com The surface mail address
is only good until early may since the Tokyo Research Laboratory will be
moving to the suburbs as part of a cost-cutting move. The physical lab
sciences section has already moved to the new site. Skyrocketing real
estate prices have lead to a huge migration away from central Tokyo.
Currently office buildings constructed in 1992 have a 20-25% vacancy
rate in central Tokyo and the rate is expected to rise.

Nodera's lecture was given in his typical, casual style, a delightful
mix of serious scientific discussion, a popular science column and
stand-up comedy.  Although Nodera is most well-known as Mr. Latex ( or
the Donald Knuth ) of Japan, this particular talk was free of any
discussion of or references to his Tex, Latex and AMS-Tex related work.
	Prof. Takashi Nodera
	Dept of Mathematics
	Keio University
	3-14-1 Hiyoshi Kohoku
	Yokohama 223 Japan
	 Tel: +81 44-63-1141 ext 3762
	 Email:  NODERA@MATH.KEIO.AC.JP

Prof. Ikebe of Tsukuba Univ. introduced his Ph.D. thesis advisor,
beginning with the phrase, "Although it has been said that famous people
need no introduction ..." We all enjoyed a very special visit by by a
very special person, David Young, who was given a nice introduction for
ceremonial purposes, rather than out of necessity.  Prof. Young made all
of us feel good about the increasing exchange between Japanese and
American mathematicians. For details on the talk, write to: Prof. David
M. Young, Director Center for Numerical Analysis, RLM 13.150, The U. of
Texas, Austin, Texas 78713-8510 USA.  Email: young@cs.utexas.edu

Abstract: We are concerned with iterative algorithms for the solution of
large systems of linear algebraic equations which typically arise in the
solution of partial differential equations by finite difference methods
or finite element methods. First we describe algorithms based on the use
of standard preconditioners combined with Chebyshev or conjugate
gradient acceleration. Special procedures are described for treating
nonsymmetric systems. Software packages designed for use on symmetric
and nonsymmetric systems have been developed as part of the ITPACK
project of the Center for Numerical Analysis at the U. of Texas. Recent
work has involved modifying the algorithms to make then more suitable
for use on advanced computer architectures with vector and parallel
capability. Algorithms are also described for improving convergence
rates by using multilevel and parallel multilevel procedures.

Many congratulations and thanks to Prof. Murota and Iri for organizing
a successful workshop. With best wishes to Prof. Yamamoto next year !

Program:

Nov 4 (W)
  13:30-14:30*   M. Iri (Tokyo U., Eng.)
                 Numerical analysis
  14:30-15:10*   M. Nakao (Kyuushu U.)
                 -\Delta u = f(x,u,\bigtriangledown u), x \in \Omega
                 u = 0, x \in \partial \Omega  (**see note below)
  15:25-16:15*   Yoshida (Tokyo U.,Eng.)
                 Simulation of flexible beam
  16:15-16:45    Tatebe, Y. Oyanagi (Tokyo U.)
                 Pre-conditioned multi-grid conjugate gradient methods

Nov 5 (Th)
   9:30-10:00    R. Suda, Y. Oyanagi (Tokyo U.)
                 The multi-model method
  10:00-11:00*   Okumura  (Kyoto U.)
                 Device Simulation(?)
  11:15-12:15*   Takeda (Japan Atomic Energy Research Institute,
                         Plasma Theory Laboratory)
                 Numerical simulations of plasmas
  13:30-14:00    S.L. Zhang, S. Fujino (Inst. for CFD)
                 GPBi-CG: Generalized Product-type Methods Based
                 on Bi-CG for Solving Nonsymmetric Linear Systems
  14:00-15:00*   Y. Saito (Hosei U., Eng.)
                 Inverse problems in biological systems and
                 their applications
  15:15-16:00    T. Tatsuo (Nagoya U., Eng.)
                 What can we do using current numerical software ?
  16:00-16:45    T. Yamamoto (Ehime)
                 Report recent int'l workshops and numerical techniques
  17:30-         60th Birthday Party for Prof. Iri

Nov 7 (F)
   9:30-10:00    Ikebe, Asai, Harada, Takanashi, Kikura, Cai (Tsukuba)
                 The eigenv. problem for infinite compact cplx symm.
                 matrices w/ appl. to numer. comput. of complx zeros
                 of $J_0 (z) - i J_1 (z) = 0$ and Bessel fcns. $J_m (z)$
                 of any real order $m$
  10:00-10:30    M. Kobayashi (IBM Research, Japan)
                 Wavelets and their applications
  10:30-11:00    T. Nodera (Keio U., Eng.)
                 Matrix computations
  11:15-12:15*   David M. Young (Texas)
                 Iterative algorithms for the soln. of large systems
  13:30-14:00    Yamashita (Suuri Systems)
                 A globally convergent primal-dual interior point
                 method for constrained optimization
  14:00-14:30    H. Yabe (Science U. of Tokyo)
                 A new class of Broyden-like family
  14:30-15:00    Uchida (Kanagawa U., Eng.), N. Yamaki (System Planning
                 Research Institute), Hongo (Senshu U.), Karasawa
                 (Kanagawa U., Eng.)
                 Tuning of workstations and supercomputers
  15:15-15:45    Toda, Ono (Chiba U.)
                 Approximating transcendental eqns.
  15:45-16:15    S. Hirano (Nihon U.)
                 Factorization of polynomials with coeffients having
                 errors
  16:15-16:45    M. Igarashi (Nihon U.)
                 Newton-Raphson method

*  invited talk
** in Latex notation ( eqns given because I was unable to translate )

The Kyoto Univ. Research Institute of Mathematics publishes a
a series of proceedings called the Kokyuu Roku Series. For further
information, please write to: Kyoto U. RIMS, Kyoto 606 Japan.
Final comment: most write-ups are in Japanese, with a few in English.

--------------------------------------------------------------------


RIMS Research Project 1992
ANALYSIS OF NONLINEAR PHENOMENA AND ITS APPLICATIONS

Seminar on Mathematical Analysis of Fluid Flows, August 10-12, 1992
Kyoto University. 

For information contact
   Prof Takaaki Nishida
   Dept of Mathematics, Kyoto University
   Kyoto, Japan
    Fax: +81 75-753-3711
    Email: A50258@KUDUTS.KUDPC.KYOTO-U.AC.JP

Topics: Mathematical theory of the Navier-Stokes equations, Water waves

Large time existence of viscous surface waves with or without surface tension
          N. Tanaka (Waseda University)

On global weak solutions of two-phase fluid flows
     S. Takahashi (Tokyo Denki University)

On the instability of the uniform rotation of the body with liquid inside
     A. Lyashenko (Kyoto University)

Some L^p estimate for the exterior Stokes flow
     H. Kozono (Kyushu University)

A higher KdV equation approximating long waves of water surface
     T. Kano (Osaka University)

Evolution free boundary problem for equations of motion of viscous
compressible barotropic liquids
     A. Tani (Keio University)

Navier-Stokes flow down an inclined plane
     Y. Teramoto (Kyoto University)

Capillary-gravity waves and O(2)-symmetry
     H. Okamoto (Kyoto University)

Growth rates for the linearized motion of fluid interfaces away from
equilibrium
     J.T. Beale (Duke University)

-------------------------------------------

Seminar on Unstable and Turbulent Motion of Fluids, 26-30 Oct 1992,
Kyoto Japan
Organized by S.Kida, T.Nishida, H.Okamoto

Numerical study of the creation and evolution of vortex filaments in 3d
turbulence
     M.E. Brachet (Ecole Normal Superieur)

Unfolding the complexity of two-dimensional turbulence
     D. Dritchel (University of Cambridge)

Mapping Closure in Burgers turbulence
     T. Gotoh (Nagoya Inst. of Tech.)

Comparisons of results from direct numerical simulations to statistical
theories of turbulence
     J.R. Herring (National Center of Atomospheric Research)

On a construction of a weak solution of the Hopf equation
     A. Inoue (Tokyo Inst. of Tech.)

Intermittency and predictability in a shell model for turbulence
     M.H. Jensen (Nordic Institute for Theroretical Physics)

Rossby wave speeds in B-plane turbulence
     Y. Kaneda (Nagoya University)

Evidence for a singularity of the three-dimensional Euler equations
     R.M. Kerr (National Center of Atomospheric Research)

Generation of vortical structure in a uniform shear flow
     S. Kida (Research Inst. for Mathematical Sciences)

Search for complex-time singularities for Navier-Stokes turbulence
     Y. Kimura (National Center of Atomospheric Research)

Theory of small-scale statistics
     R.H. Kraichnan (R.H. Kraichnan Inc.)

Vortex sheet roll-up
     R. Krasny (University of Michigan)

Inertial manifolds for Navier-Stokes equations
     M. Kwak (Chonnam National University)

Simple modes with features of renormalization for turbulent transport
     A.J. Majda (Princeton University)

Stability of viscous shock profiles without genuine nonlinearity
     A. Matsumura (Kanazawa University)

Transition to turbulence in circular Couette flow with co-rotating cylinders 
     M. Nagata (University of Birmington)

RNG Treatment in turbulence
     T. Nakano (Chuo University)

Local isotropy and pressure fluctuations in turbulence
     M. Nelkin (Cornell University)

Bifurcation diagrams for capillary-gravity waves
     H. Okamoto (Research Inst. for Mathematical Sciences)

High resolution simulations and analysis of a turbulent flow with high
symmetry
     R. Pelz (Rutgers University)

A geometrical theory of scaling and multiscaling in turbulence
     I. Procaccia (Weizmann Institute of Science)

The fine scale structure of homogeneous turbulence and the Townsend Lundgren
model
     P.G. Saffman (California Inst. of Tech.)

Nonlinear instability of the laminar flow in a rectangular duct and generation
of the turbulent secondary flow 
     T. Tatsumi (Kyoto Inst. of Tech.)

Hidden conservation laws in hydrodynamics.  Energy spectra, PDF's and possible
origin of intermittency in turbulence
     V. Yakhot (Princeton University)

Bifurcation in a flow between two concentric spheres with different
temperatures
     S. Yanase (Okayama University)

-------------------------------

Seminar on Interfacial Dynamics and Patterns 
19-23 Oct 1992, Kyoto Japan
For information contact
	Professor Masayasu Mimura
	Faculty of Science
	Hiroshima University
	1-1-89 Higashi-senda-machi
	Haka-ku, Hiroshima 730
	 Tel: +81 82 241 1221 ext. 3790; Fax: +81 82 246 8149
         Email: MIMURA@SCI.HIROSHIMA-U.AC.JP

Complex pattern formation in the developing embryo
     J.D. Murray (University of Washington, USA)

Transient and steady spatial structures from tissue interactions
     V.S. Manoranjan (Washington State University, USA)

Pattern formation in solidification
     R. Kobayashi (Ryukoku University)

Experimental studies on time-evolution of interfacial structure in Polymer
alloys via Spinodal decomposition
     T. Hashimoto (Kyoto University)

Spiral waves in excitable chemical media and their coupling to convective flow
     T. Plesser (Max Planck Institute, Germany)

Distinguished limits of the phasefield equations: Stefan model and motion by
mean curvature
     G. Caginalp (University of Pittsburgh, USA)

Biological pattern and structure from simple interacting units
     L. Edelstein-Keshet (Univ. of British Columbia, Canada)

On a system of reaction-diffusion equations arising from competition in an
unstirred chemostat
     Hsu Sze-bi (Tsing Hua University, Taiwan)

Stability of one-dimensional waves in weak and singular limits
     C.K.R.T. Jones (Brown University, USA)

Roughening and scaling exponents in deterministic versus stochastic models of
surface dynamics
     I. Procaccia (Weizmann Institute of Science, Israel)

Existence of nucleating solutions for the Cahn-Hilliard equation in higher
space dimensions
     G. Fusco (University of Rome II, Italy)

Interface dynamics for the Cahn-Hillard equation
     P.W. Bates (Brigham Young University, USA)

Variational approximation to propagating fronts
     R.H. Nochetto (University of Maryland, USA)

Breathing motion of interacting excited domains
     T. Ohta (Ochanomizu University)

Control of initiation of rotating spiral vortices in FitHugh-Nagumo and
Beeler-Reuter equations of excitable media
     D. Romashko (Inst. Theor. Experimental Biophysics, Russia)

Generalized motion by curvature with a Dirichlet condition
     P. Sternberg (Indiana University, USA)

Dynamics of interfaces in a reaction-diffusion system
     E. Yanagida (Tokyo Inst. of Tech.)

Formation of patterns during growth of two-dimensional crystals
     E. Yokoyama (Kyushu Inst. of Tech.)

Generalized interface evolutions
     Y. Giga (Hokkaido University)

Chemically driven nonlinear waves at oil-water interface
     S. Kai (Kyushu Inst. of Tech.)

------------------------------END OF REPORT----------------------------