Bergen Computational Physics Lab
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~ 50 projects
Bergen Computational Physics Lab
~ 100 visitors
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Project Hosts (BCPL)
Name
Anderlik, Csaba
Csernai, Laszlo P.
Hansen, Jan-Petter
Hansteen, J. M.
Helstrup, Haavard
Kocbach, Ladislav
Osnes, Eivind
Rohrich, Dieter
Stamnes, Jakob
Vaagen, Jan S.
Prof.
U of B
Ph.D.
2001(+) Univ. of Bergen, 2001
1987
Eotvos U. Budap. 1976
1999
Univ. of Bergen, 1990
1985($) Univ. of Bergen, 1976
2001(?) Univ. of Bergen, 1993
1993
Univ. of Bergen, 1977
1985(#) Univ. of Oslo,
1966
1999
Univ. of Marburg, 1986
1990
Univ. of Oslo,
1975
1993
Univ. of Bergen, 1977
Publ. #
ISI
Citations
ISI'02
6
101
56
27
51
39
98
72
54
96
51
2116
470 (*)
1013
646
974
1088
1853
1039
1248
(+) Senior Scientist
($) Professor emeritus
(#) Prof. Univ. of Oslo
(?) Prof. Bergen Univ. College
(*) For JP Hansen citations that could not be traced back to the original by the ISI
WoS trace program are not counted, because of the large number of citations (800+)
to authors with the same name and initials.
Bergen Computational Physics Lab
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BCPL Technical Review’02
- 14 yes of 14 questions: 100% result. Some comments:
- Many institutions would like to have 92% of their users happy with
what they provide and judging that the Lab is "extremely good and
managed in an optimal way'. More importantly, users claim that they
achieve their scientific goals and publications demonstrate that the
achieved goals are of high scientific value.
- 99% of users believe that they would not achieved the same results
without the access to the infrastructure and all are thankful to the
European Community for providing the scientific and financial support
through the ARI programme.
-The Bergen Computing Physics infrastructure is world-class in the
topics of atomic, molecular, nuclear and particle reaction
modeling. It combines parallel computer power and theoretical
physicists and therefore offer an exceptional scientific environment to
develop high quality research projects.
-The quantity of access is 15% more than the foreseen number. This is
justified by the change of computing facility : the Turbo Regatta
supercomputer is faster than the previous machine.
Bergen Computational Physics Lab
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Bergen Computational Physics Lab
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Highlights of BCPL achievements in 2002
Since January 2000 up to now BCPL has received 55 project
proposals has accepted 53 projects for EU support from the beginning
of yr. 2000. So far, near to 100 researchers visited BCPL. Although
we did not receive additional financing from the EU to cover the
excess demand, we did accommodate 16.6% more visitors, than our
first contract planned. We did not run out of EU financing:
by saving on the expenses of the user meetings held at ECT* in Trento Italy,
and taking advantage of our new IBM machine with 12.8 times increased
power. As a consequence we managed to transfer 7.5% of our budget from
the User Travel to the User Fee part, and so we stayed within the limits of our
EU financing.
Bergen Computational Physics Lab
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In year 2002 we hosted researchers for 19 projects,
spreading over particle, high and low energy nuclear,
atomic, plasma and molecular physics, and extending to
related fields in astrophysics as well as abstract statistical
physics problems for self avoiding walks and clusterization
phenomena in sociological systems. Most projects belong
to BCPL’s core activity of reaction modeling in different
areas, 3-4 projects are related or abstract problems. A
smaller part of the projects were continuing from the
previous year.
In this report only a fraction of the projects can be
mentioned with important and recent results. The projects
are grouped in thematic classes, as some of them are
strongly related.
Bergen Computational Physics Lab
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PARTICLE PHYSICS
In the project “Three-body initial states in charmonium dissociation”
(project no. 46) from Sylesian University, Czech Republic, led by P.
Lichard, the main goal of the whole project was to calculate the
contribution to the charmonium dissociation from the three-initialmeson reactions in a hadron gas. It was neccessary to determine the
propagators and couplings of resonances before actual calculations of
the reaction rates.
During a short initial stay in Bergen the running masses of vector
mesons, rho and Kstar, were determined by means of the dispersion
relations. A good test in the rho meson case was a perfect agreement
between the calculated and experimental value of the electromagnetic
mean square radius of pion. It is well known that the usual fixed mass
parametrization of the rho meson propagator badly fails in this test.
This work will be utilized later to calculate possible hadronic
background effects to the charmonium suppression in Quark-gluon
Plasma.
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HIGH ENERGY SUBATOMIC REACTIONS
Projects 34-38, 44, addressed these reactions with microscopic
transport models, while 29, 40, 43; used continuum or CFD
approaches to evaluate the collective effects in these reactions.
Project 29 was actually an important methodical advance, which
introduced the use of different modules in a reaction model and
established an exact physical interface among the modules. This
enables later to create more involved modular reaction models,
which can take advantage of GRID computing.
Projects 34 and 36 worked on important parts of reaction models, on
Meson-Nucleon Scattering (no. 34, KFKI, Budapest, by G. Wolf)
and on Meson Production (no. 36, ELTE, Budapest, by G. Papp).
The latter project has advanced considerably, so the results could e
used for jet calculations in heavy ion reactions. The results obtained
this way were published in two conference reports and in two papers.
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HIGH ENERGY SUBATOMIC REACTIONS contd.
Two German projects, no. 38 and 44, led by A. Faessler, Tuebingen and
F. Puelhofer, Marburg respectively, simulated heavy ion collisions by
the QGSM and UrQMD models. These projects performed a
comprehensive analysis of a large number of observables, which
enables us to make a complex assessment of the experimental
observations.
Project 43 on “Relativistic Hydrodynamics for Heavy Ion Collisions”
by H. Stoecker, & D. Strotman, Frankfurt, Germany, is a comprehensive
model development work for extending the CFD approach to Ultrarelativistic, BNL - RHIC and CERN – LHC energies. Here already the
possible Modular Modeling approach and possible task sharing is taken
into consideration. Project 29, led by V. Magas, Lisbon, Portugal was
working on the interface between the CFD module of the reaction
simulation and of the so-called Freeze Out module. This module
describes the stage of the reaction where mechanical, thermal and
chemical equilibrium ceases to exist at the end of the reaction, and the
final observables develop.
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ASTROPHYSICS
In project 42 on “Cooling of Extremely Compact Stars” led by Z. Stuchlik
of Silesian University, Opava, Czech Republic, the study of neutron, quark,
and hybrid stars was concentrated on diverse topics leading to the problem
of cooling of extremely compact stars. The group worked with the
preparation of a numerical code for cooling processes in extremely compact
stars with realistic equations of state. They also considered hybrid stars with
two-flavour quark cores, or three-flavour, strange quark cores, and
discussed the possibility of a "cascade" evolution of a neutron star to a
hybrid star with succesively two-flavour, and three-flavour quark cores as a
result of accretion of matter onto the neutron star. For simplicity, the phase
transition between the nuclear matter and the quark matter was considered
to be of the first kind. A numerical code for selfgravitating polytropic and
adiabatic fluid spheres taking into account the influence of a nonzero
vacuum energy has been developed during our stay at BCPL. As a result of
these and previous works a paper concerning the mixed influence of a
nonzero vacuum energy (leading to both a repulsive or an attractive
effective cosmological constant) and an electric charge on the character of
black holes and naked singularities has been finished.
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STATISTICAL PHYSICS contd.
An interesting and very abstract idea is the base of project 45 by Z. Neda, of
Cluj, Romania: “Statistical physics approach to clusterization phenomena in
sociological systems”. The aim of the project was to study a spin-glass type
frustrated model for coalition formation in sociological systems. Our main
approach to this NP hard optimization problem leads through the classical
methods of statistical physics using Monte Carlo optimizations. Two type of
algorithms are used: (i) the classical simulated annealing method and (ii)
the recently reported extremal optimization approach. Both methods are
rather time-consuming, and high parallelization of the code is desired.
Our results suggest that a globally coupled large system with +/interactions between the elements, has two marginal behaviors. When the +
links number dominate over the - links number in the optimal situation the
system will clusterize in a single large cluster. When the - links number is
bigger, the systems splits in as many clusters as many elements there are in
the system. This transition resembles the one obtained in percolation type
problems, and gives a hint that the model can be used effectively to study
the so-called "social-percolation" problem too.
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CONCLUSIONS of the SCIENTIFIC REPORT
The selected projects give a taste of the variability of BCPL's research
projects. Most projects were fully successful and achieved their goal. A
few projects plan for a continuation.
The offered computational power to EU-RI user groups is increased
by a factor of 12.8 from the beginning of 2002 by installing an IBM eserver supercomputer (For the same access charge to the EU as before!).
At the time of the installation it was the 6th most powerful supercomputer
in Europe.
We are preparing for the FP6 applications now. We apply as an
individual RI for providing Transnational Access just as before but for
more users (~40 man-months per year). In addition we participate in
several I3, RI-network applications. We also apply for a Marie Curie Early
Stage Training Site.
In the Thematic programs under the IST and Nanotechnology and
nanoscience subjects corresponding to our 3 Expressions of Interest
submitted to the EU in June 2002.
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PRESENT ACTIVITIES:
Modeling Subatomic, Atomic & Molecular Reactions
CONSULTING & SUPERCOMPUTER ACCESS
EU FP5 TARI no. 1 (2000-2002) ----- EUR 396 000 . –
EU FP5 TARI no. 2 (2003-2004/2) --- EUR 175 000 . –
EU FP5 MCTS
(2001-2004) ------ EUR 242 000 . –
South Africa
(2002-2005) ------- EUR 160 000 . –
Rolls-Royce/HFK / 2003 -
------
Bergen Computational Physics Lab
pending
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BCPL plans for FP6/RI programme
BCPL
I3HP / CSERNAI
Single RI for
offering
I3NS / VAAGEN
I3Atom / HANSEN
Transnational Access
I3HPC / ANDERLIK
I3 Member for:
- Networking and
- Joint Res. Projects
[ RI rules would not allow for BCPL to provide access from four I3-s, while
networking and JRP participation is OK.]
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Other BCPL Proposals to EU
•
•
•
•
•
Bergen-Nano-Phase NoE (N) / 6.03.03
MC Early Stage Training Host /2.04.03
BCPL Research Infrastr. / 15.04.03
Bergen-Dist-Comp IP (IST) / 24.04.03
Bergen-Heavy-Ion NoE (IST)/ Fall 03
/Csernai
/Csernai/Voit
/Csernai
/Anderlik, D.R.
/Anderlik, Csernai
• Participation: I3 activities 3-4 / Csernai, Vaagen, Hansen, Anderlik
• Participation: TIME (N) / coordinated by F. Shauer (CZ)
• ???
Bergen Computational Physics Lab
/ Anderlik, Csernai
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