ICRA Network Workshop - Chaos
During recent years radical changes have occurred in many areas of
scientific research following from the realization of the underlying
universality of the concepts of chaos, randomness, and
unpredictability. At the same time spectacular advances in the theory
of dynamical systems have provided rigorous tools to study these
complex phenomena. This has gone hand in hand with the increased
accuracy of observational data, which offers the opportunity to put
serious empirical constraints on theory.
The concept of chaos is already becoming the unifying thread throughout
the entire spectrum of astrophysical problems --- from the solar system
to cosmology and the large scale structure of the universe.
The idea of bringing together specialists from diverse topics in this
field is an attractive one because of the possibility of exchanging
useful information through direct interaction.
The workshop will include invited review talks and contributed
communications.
The proceedings of the workshop will be published in World Scientific
Advanced Series in Astrophysics and Cosmology edited by Li-Zhi Fang and
Remo Ruffini.
Topics include:
1. Solar system
2. Interstellar medium
3. Star clusters and galaxies
4. Clusters of galaxies and large-scale structure of the Universe
5. Cosmology
Scientific Organizing Committee:
V.Belinski, S.G.Djorgovski, L.Z.Fang, L.Galgani, V.G.Gurzadyan,
S.Inagaki, J.Laskar, D.Lynden-Bell, J.Makino, G. Meylan, Ya.Pesin,
R.Penrose, D.Pfenniger, I.Prigogine, D.Ruelle, R.Ruffini (Chair),
W.Zurek
Local Organizing Committee:
D.Bini, D.Boccaletti, S.Casanova, L.Galgani, V.G.Gurzadyan (Chair),
A.Merloni, G.Pucacco, S.Torres
Deadline for preliminary application: November 1, 1998
Contact information:
Chaotic Universe Workshop
ICRA, Dipartimento di Fisica
Universit?degli Studi di Roma "La Sapienza"
Piazzale Aldo Moro 5, 00185 Roma, Italy
tel: + 39 6 49914397 fax: + 39 6 4454992
The artwork represents:
Michelangelo, Sistine Chapel, The Libyan Sibyl (1510) opening the book
of the laws of Nature, and the Koch curve, proposed by Helge von Koch
in 1904, possessing fractal properties presumably associated with the ...
Instruction for proceedings
****************************************
The proceedings should be published by World Sci.,
edited by V.G.Gurzadyan and R.Ruffini
****************************************
The deadline for proceedings is July 1, 1999.
Please submit: (a) .tex file. (b) .ps file, (c) hardcopy.
The files should be submitted to: chaosproc@icra.it,
hardcopies to: V.G.Gurzadyan,
Proceedings "The Chaotic Universe"
Gruppo G9, Dipartimento di Fisica
Universita di Roma La Sapienza
Piazzale Aldo Moro 5
Roma, 00185, Italy
Page limits: 2 - for posters, 10 - for short talks, no strict limit
for review talks.
Submission of manuscript will not mean that they will automatically be
included into the proceedings;
certain papers may be send to referees upon the decision of editors.
To prepare the LATEX files please download the following files:
readme.txt
ws-p8-50x6-00.cls
ws-p8-50x6-00.tex
ws-p8-50x6-00.pdf
programma definitivo
Workshop "The Chaotic Universe", February 1 - 5, Roma - Pescara
February 1, Monday morning February 2, Tuesday morning February
3, Wednesday morning February 4, Thursday morning February 5,
Friday morning February 6, Saturday morning
Plenary talks Plenary and short talks Plenary and short talks Plenary
and short talks Plenary and short talks Visits
ChairR.Ruffini Chair G. Meylan Chair F. Combes Chair V. Gurzadyan Chair
R. Jantzen
Opening Addresses Fractals Star clusters and galaxies Cosmology
Techniques and methodologies
9.00 Gurzadyan, Ruffini 9.00 Petrosky 9.00 Bertola, Corsini 9.00
Kamenschik 9.00 Makino
9.30 Fang 9.40 Einasto 9.40 Merritt, Valluri 9.40 Dabrowski 9.40
Eckmann
10.10 Gurzadyan 10.10 Galgani 10.10 Gurzadyan 10.00 Belinski 10.20
Ruffo
10.50
Meylan
10.40 Cincotta
11.20 Coffee Break 11.00 Ceremony: Honorary citizenship to Ilya
Prigogine;
Lecture by Prigogine:
"Thermodynamic Universe - dynamics and arrow of time" 11.00 Coffee
Break 11.00 Coffee Break 11.00 Coffee Break 11.00 - 13.00 Vatican
Gardens and St. Peter's Basilica
12.00 Muzzio 11.40 Zurek 11.30 Montani 11.30 Ruffini
12.40 Belinski 12.20 Perez 11.50 De Paolis 11.50 Cipriani
12.40 Tsuchiya 12.10 Levin 12.05 Allahverdian
12.20 Pucacco
12.35 Melkonian
12.50 Sigismondi
13.00 Lunch 13.00 Lunch 13.00 Lunch 13.00 Lunch 13.10 Lunch
February 1, Monday afternoon February 2, Tuesday afternoon
February 3, Wednesday afternoon February 4, Thursday afternoon
February 5, Friday afternoon
General relativity Star clusters and galaxies (cont.) Stars and
interstellar medium Solar System
Chair J. Einasto Chair F. Bertola Chair J. Makino Chair V. Belinski
Chair J. Laskar
14.00 Laskar 15.00 Combes 15.00 Levin 15.00 Vazquez-Semadeni 15.00
Lopac
14.40 Nieuwenhuizen 15.20 Fang 15.40 Patsis 15.40 Ossenkopf 15.20
Umehara
15.40 Bini, Jantzen 16.00 Zakharov 16.15 Keheian 15.40 Chernin
16.00 Shevchenko
16.20 Kotsuchenko
16.00 Coffee Break 16.20 Coffee Break 16.30 Coffee Break 16.40 Coffee
Break
16.50 Di Bari 17.00 Sota 17.00 Mardling 17.10 Sobouti
17.10 Ali 17.20 Wu 17.30 Gevorkian 17.30 Melnikov
17.30 Zalaletdinov 17.40 Petrovskaya 17.50 De Siena
18.00 Merafina Concluding remarks
V. Gurzadyan
R. Ruffini ...
Abstract of talk
Aarseth Sverre
Institute of Astronomy, Cambridge
NBODY6: A new star cluster simulation code
This new N-body code is based on the old workhorse NBODY5 but has been
converted to the modern Hermite integration method. It resembles
closely the code NBODY4 which has proved successful on the
special-purpose HARP computers, and like in NBODY5 the Ahmad-Cohen
neighbour scheme has been added. Hermite integration is also employed
for treating binaries by the KS regularization method, where the
so-called Stumpff formulation has now been adopted. The standard
Population I synthetic stellar evolution is replaced by a newly
developed scheme (Hurley & Tout 1999) for a wide range of metallicity.
The code is intended for workstations and laptops, and is more
efficient and better behaved numerically than NBODY5. It is avaliable
for general use by public ftp.
Allahverdyan Armen
University of Amsterdam
Information theory approach to cosmological problems
Beciu M.
Ovidius University, Constanta
A retroaction mechanism to solve the cosmological constant problem
We present a mechanism that brings, in a natural way, the
effectivecosmological constant(c.c) arbitrary close to zero. Our
scenario dampsthe c.c to a vanishing small value, whatever its initial
value wouldhave been. We consider the potential energy of the Higgs
field in thetrue vacuum, with a temperature dependent mass term and
theinfluence this term may exert on the cosmological dynamics. With
aninitial value equal to or smaller than the Higgs potential in the
true vacuum, we show that the effective c.c (the initial arbitrary
constant and the contribution of the Higgs field) tends to zero,
roughly,exponentially fast.
Beckman John
Instituto de Astrofisica de Canarias, Tenerife
Chaotic behaviour in the star formation rate near the sun
Using observational data on the number of stars formed as a function of
age , using cromospheric activity as the indicator , we show that the
star formation rate in the solar neighbourhood must have been chaotic
on timescales less than 1Gyr. We also offer evidence that the system of
gas and stars in the local spiral arm shows behaviour analogous to that
of the logistic map.
Belinski Volodia
ICRA ...
FA
for room reservation please contact Fabrizia Rossetti at
FA.SI. CONGRESS
V.le Gorizia, 24 - 00198 Roma
Phone +39 06 85.40.296 - +39 06 84.17.001 - Fax +39 06 84.14.495
- e-mail fasicong@euol.it
Linked documents
Documents found within three clicks: readme.txt, ws-p8-50x6-00.pdf
