Archive on 1998 Year
December,
30 1998
"Supercomputing: results and main trends."
A.V.Bogdanov
E-mail: bogdanov@hm.csa.ru
December, 22 1998
Reports on conference visits.
December, 15 1998
"Using Java-applets for visualization of result of modeling"
A.S.Kadyrov, V.N.Serov, M.G.Samsonova
"Visualization in numerical experiment why it
is necessary and how to do it."
Zatevakhin M.A., Nikitin
A.B., Reshetnyak V.G.
The results of the author's
activity in visualization field is available on http://www.csa.ru/Inst/bogd_dep/gasdyn/visualization/visual.htmr.
The main purpose of this seminar is the attempt to summarize Institute
staff visualization experience and to integrate available methods and relevant
requirements to hard- and software. That is why all volunteers are wellcome
as co-authors. If you want to take part in this seminar please sent message
to misha@fn.csa.ru.
December,
8 1998
Modeling of group III-nitrides epitaxy."
Roman A.Talalaev A.F.Ioffe
Physical-Technical Institute, St.Petersburg
E-mail: talalaev@nevsky.net
November, 24 1998
"CD-ROM and multimedia oriented presentations
development."
Murat Z.Ilyasov.
E-mail: murat@fn.csa.ru
November, 10 1998
"On conception of scientific-information system."
Eugeniy G.Kolesnichenko
October 20, 1998
11.30 a.m. John Reinitz (Brooksdale Center for Molecular
Biology, Maunt Sinai Medical School, New York, USA)
"Dynamics of segment determination in Drosophila
embryo."
Abstract
Dr Reinitz performs both
theoretical and experimental studies on mechanisms of segmentation genes
expression during early Drosophila embryogenesis. Theses studies are aimed
on a better understanding of the process by which maternal gene product
gradients ultimately give rise to the segmental pattern by means of regulatory
cascade of transcription factors encoded by zygotic segmentation genes.
Dr. Reinitz uses the confocal microscopy for to obtain the qualitative
characteristics of segmentation genes expression patterns. These data are
used as a state variables in the dynamic model for genes expression pattern
formation. To fit the model to observer levels of segmentation genes products
the parameters are adjusted by least-squares optimization. This optimization
is carried out by the method of simmulated annealing.
The validity and utility
of the model has been demonstrated by its successful application to several
important problems o embryo development
October,
13 1998.
"On the resistance of a body in supersonic flow
with energy release region located in front of the body."
G.A.Lukianov
E-mail: monte@fn.csa.ru
September,
15 1998
"Effective working with Parsytec. Using parallel
programming. Difference between Parsytec and Convex, SPP".
I.Evseev
E-mail: evseev@csa.ru
September,
8 1998
"21th International Symposium on Rarefied Gas
Dynamics July 26-31, Marseille, France: breif Information."
E. Sokolov
E-mail: falcon@fn.csa.ru
July,
15 1998
CSA user's seminar
(russian version)
CSA
user's seminar will take place at SPITMO at 12 a.m.
June,
30 1998
"Cloud of the powerful explosion"
M.A. Zatevakhin.
E-mail: misha@fn.csa.ru
The
gasdynamics effects of the cloud developing are discussed. The vortex dynamics
is essential feature of such phenomenon understanding. Formation of the
buoyant vortex ring and its propagation laws is one of the most complicated
problems of the classic hydrodynamics and burst cloud is the bright sample
of these laws implementation. Condensation processes, aerosols transport
and scavenging are described. Report is illustrated by results of axisymmetric
simulations animated using TECPLOT 7.0.
June,
23 1998
"Classical and quantum chaos in three body system
dynamics"
A.S.Gevorkyan,
A.G.Grigoryan, S.Matveev E-mail: ara@fn.csa.ru
"Computing of Coefficients for Gas Dynamic Boundary
Conditions".
D.B.Moskvin
June,
16 1998
"Modern HTML development design tools"
M.Z.Ilyasov
E-mail: murat@fn.csa.ru
At
a seminar there will be about cascading style sheets, graphics on Web and
HTML editors. Two modern tools of HTML pages development - Dreamweaver
and HomeSite will be considered. The full text of the report (russian version).
June,
2 1998
"COMPUTATIONAL MODELS IN TWO-PHASE FLOWS"
Yu.Tsirkunov
(speaker), A.Volkov, N.Tarasova and S.Panfilov E-mail:falcon@fn.csa.ru
A B S T R A C T
Models
for computational simulation of dilute gas-particle mixture flows are reviewed.
Main attention is payed to the dispersed phase. Three approaches to simulation
of "gas" of particles are discussed. First, the full Lagrangian
approach, when particles are considered as the collisionless continuum,
and the Lagrangian variables are used not only in the impulse, angular
momentum and energy equations, but in the equation of the mass conservation
law as well. This approach is applicable to the case of regular motion
of particles and provides very high accuracy when calculating particles'
concentration field. Second, we consider the method of Crowe that is the
unique one applicable to the case of stochastic motion of particles without
collisions between particles. Third, the Direct Simulation Monte-Carlo
method for dispersed phase with particle-particle collisions. Examples
of calculations are presented.
May,
26 1998
"Contemporary and perspective supercomputer arcitecture"
Alexandre
V.Bogdanov E-mail:bogdanov@hm.csa.ru
May,
19 1998
"Python langauge for scientific applications"
Alexander
Voinov E-mail: avv@isida.ipa.rssi.ru
AI lab, AI&DB dept.
Python
is a modular object-oriented scripting langauge, which is used for such
tasks as system administration, text/data processing/filtering, office/database
automation, Internet programming. Current report concerns the new popular
domain of Python: automation of scientific applications for experimental
data processing/interptetation. Easy interface Python->C(Fortran,Pascal,...)
enables one to separate the time critical though slowly evolving parts
of application from more variative higher-level tasks such as controlling
the processing strategy. For IHPCDB, where data processing tasks could
be run for days and weeks, such a tool seems useful and productive.
May,
12 1998
"Low cost batch computing cluster based on PC
(project BCFpc)"
The reporter
will tell about the real computing cluster (farm) which has been realized
and put into operation at PNPI last month. Some info on that topic you
can find on the page
http://www.pnpi.spb.ru/pcfarm/.
Andrei
E. Chevel (Shevel)
Petersburg Nuclear Physics Institute, Computer Systems
Department,
188350, Gatchina, St.Petersburg region, Russia. E-mail: shevel@pnpi.spb.ru
TEL: +7-812-71-385-40
FAX: +7-812-71-360-40
http://www.pnpi.spb.ru/comp_home.html
May,
5 1998
"System of the Coupled Quantum Oscillators on
Fractal Space-Time Continuum"
Ashot
S. Gevorkyan
April,
28 1998
"Internal gas targets for storage rings".
V.L.Varentsov
Supplement: "Visiting HPCN-98 conference and GMD"
Maria
G.Samsonova, Elena N.Stankova
April,
14 1998
"Hyperfine structure in hydrogenlike and lithiumlike
high-Z ions".
Vladimir
Yerokhin
I
am going to talk about: 1) My stay in Germany. Conference "XIX Energiereiche
Atomare Stoesse", Riezlern, Jan.1998. 2) Present level of theoretical
predictions and experimental results for hyperfine splitting in highly
charged ions. 3) Main features of calculations of quantumelectrodynamical
corrections for hyperfine splitting without expansion in \aplha Z.
April,
7 1998
2-dimensional direct simulation Monte Carlo (DSMC)
of near-nucleus comet (coma) atmosphere.
Lukianov,
Khanlarov.
The
seminar will be held in the director's office.
Abstract:
The direct simulation of water vapor flow near cometary nucleus was carried
out. The influence of indicated factors on the flow are discussed: - the
boundary conditions on the surface of the nucleus; - the unevenness of
the surface and gas evaporation; - the Knudsen number.
IN
MEMORIAM Prof.G.Dubrovsky
6 p.m. April 9th, 1998
White
Hall of the House of Scientists,
26, Dvortsovaya embk.,
March,
31 1998
An
algorithm of parallel direct simulation Monte Carlo for flows of rarefied
gas on shared-memory multiprocessors. /Grishin I.A., Zakharov V.V., Lukianov
G.A./
A
general scheme and the algorithm of parallel direct simulation Monte Carlo
for non-stationary flows of rarefied gas on massive- parallel computer
system with shared-memory is described. The efficiency of parallelisation
for DSMC on massive-parallel computer system SPP-1600 (8 CPU) with shared-memory
is investigated on the example of two physics problems. High efficiency
of parallelisation of calculations is demonstrated. The new physical results
which were obtained by simulating of indicated problems are briefly discussed.
March
24 1998
I.
Evseev
MPI
- Parallel computing toolkit for programmers.
Seminar
will be in 12.00 in Fontanka, 120 , Apartment 7
February
24 1998
I.B.
Petrov
Using
3DMax for visualisation and presentations.
Seminar
will be in 12.00 in the Hypermedia Lab: Moskovsky pr. 202, LIMTU, building
in a court yard, 3 floor, 301 room.
February
10 1998
V.V.
Gursky, A.M. Samsonov
Stationary
periodical and localized solutions to the nonlinear adsorption-diffusion
equation
Abstract
An
approach for obtaining of exact stationary solutions in terms of elliptic
functions to equations approximating the nonlinear adsorption-desorption
equation of the problem of adsorbates growth on a surface is proposed.
The approach is based on the reduction of a hyperelliptic integral to an
elliptic one. Solutions obtained by means of this approach are discussed.
The domains of physical parameters' values are found, for which the corresponding
solutions are bounded and physically meaningful.
February
3 1998
Maria
G.Samsonova.
Modern
trends in computer biology.
Results
of Pacific Symposium on Biocomputing held on Maui 4 - 9 January 1998
January,
27 1998
Vladimir
A. Roudnev
"Improved tenzor-trick technique in Faddeev calculations:
application to helium trimer".
January,
13 1998
Alexander
V. Veremyev
DATA AND
DATABASES
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