Site: **Institute of Computational Technologies
Russian Academy of Sciences, Siberian Branch
Ac. Lavrentiev Ave., 6
Novosibirsk, 630090, Russia**

Date Visited: October 30, 1995

WTEC Attendees:

R. Blidberg (report author), S. Chechin, M. J. DeHaemer, J. Moniz

Hosts:

Academician Yurii Shokin

Prof. Victor M. Kovenya

Deputy Director, Head, Department of Mechanics of
Continuous Media.

Phone: (3832) 351168 (351242 FAX).

Email: kovenya@ict.nsk.su

Phone: (3832) 351168 (351242 FAX).

Email: kovenya@ict.nsk.su

Prof. Anatolii Fedotov

Deputy Director, Head, Department of Informational
Technologies.

Email: fedotov@ict.nsk.su

Email: fedotov@ict.nsk.su

Dr. Sergey Golushko

The institute has a staff of 120 people working in 12 laboratories. Their applied [i.e., military] work has now almost stopped. They are now adapting their developed software to other applications.

The department has four laboratories:

Laboratory for Numerical Analysis -- Dr. Gayaz Khakimzyanov, Head

This laboratory deals with the development of the theory of difference schemes, algorithms for numeric solution of the problems of continuum mechanics, and relevant applied software development. The primary focus is on the development of adaptive grids for 3D models of hydrodynamic processes.

Laboratory for Modeling of Wave Processes -- Dr. Boris Chubarov, Head

Research in this laboratory mostly concerns the development of algorithms for the numerical modeling of the transformation of long surface gravitational waves on the water surface. Special attention is paid to nonlinearly dispersive approximations of shallow water theory. Several different models were discussed. The first was a simulation of a tsunami: its travel time and wave amplitude were predicted by introducing data describing a number of parameters associated with the initial event (Chubarov 1992). The resulting surface waves were displayed on a PC.

Laboratory for Modeling of Atmospheric Processes -- Prof. Gdalii Rivin, Head

This laboratory deals with the solution of mathematical problems associated with the time and space reconstruction of "meteoelements fields" based on observational data from direct and indirect probing of the atmosphere, i.e., the development of numerical methods for analysis of meteorological data, initialization, atmospheric models and "meteofields" visualization.

Laboratory of Interval Analysis -- Dr. Valerii Kobkov, Head

Broad classes of numerical algorithms for optimal solution of "external problems" for the interval linear algebraic system (PSS and PPS algorithms) have been developed. A complete "technological chain" has been developed to solve the linear problems of tolerances -- a generalized stabilization problem -- for interval linear static problems.

The department has five laboratories with a total of 30 researchers.

Laboratory of Computational Aerodynamics -- Dr. Sergey Cherny, Head

This laboratory mostly works on the development of effective numerical algorithms for the solution of aerodynamics problems and their application to different spheres of science and technology. The focus is on aircraft modeling problems, such as modeling internal flow in turbines. Models simpler than Navier-Stokes are used, since the lab has limited computational capability. A demonstration was run representing the internal flow in a turbine. It represented the calculation of 30,000 points in that flow.

Laboratory of Computational Hydrodynamics -- Gennadii G. Chernykh, Head

This laboratory mostly does research on solutions properties of equations with sign-changing viscosity coefficients, construction of projectional grid solution methods for elliptical and parabolic problems with the interval and boundary layers, and numerical modeling of flows of incompressible fluids. Although they originally studied turbulence in ships' wakes, they are now investigating free turbulence using semi-empirical models of turbulence.

Laboratory of Plasma Physics -- Galina Dudnikova, Head

This laboratory primarily investigates non-stationary processes and cosmic plasma using several different levels of numerical models (MGD, kinetic, hybrid) and dimensionality (1D, 2D, 3D) developed in the lab. The researchers are using approximation techniques to investigate problems such as the Boltzman model for semiconductors. They are also using this technique to look at hydrodynamics problems. One simulation was shown utilizing a 486-type PC that modeled plasma flow. This was a hybrid model using several approximations and a technique of splitting the problems into simpler pieces, then recombining the results to obtain a 3D model. A simulation was run of a laser pulse hitting a plasma bubble. The kinetic equations of the interaction of one million particles have been represented.

Laboratory of Statistical Models and Methods -- Prof. Yurii Grigoriev, Head

This laboratory specializes in research on statistical models of rarefied gas, hydrodynamic turbulence, and coagulation theory. A demonstration was shown in which a gas jet and the control of that jet were simulated over time.

Laboratory of Computational Physics -- Prof. Grigorii Gagiyak, Head

This laboratory's work can be divided into five areas:

- Working out models to describe charge accumulation in an undergate insulator in strong electric fields and under external radiation
- Numerical simulation of photoresponse of different photodetectors (i.e., differing wavelengths, materials, and temperatures)
- Numerical simulation of technological processes (e.g., CVD reactors, plasma-chemical reactors for deposition and etching, molecular beam epitaxy, and thermal oxidation of silicon)
- Simulation of absorption and desorption processes for atoms and molecules applying quantum-chemical methods in cluster approximation
- Simulation of defects and reaction barriers in solids applying quantum-chemical methods in cluster approximation

*Laboratory of Information and Telecommunications*

The Laboratory of Information and Telecommunications provides a communication network for research, data banks, and data analysis in support of all the institutes at Akademgorodok. An effort is underway to implement Internet access for these institutes via the Moscow backbone. This project will include networking all of the institutes to a central location in Akademgorodok, then to Novosibirsk, then to Moscow via satellite link.

- 19.2 kB to Moscow at the time of the WTEC visit; they want 2048 kB to Moscow
- Set up communications in local area, then to Moscow
- Plans are for land line, then F/O in '96, then satellite link in '97
- Local network server is a SPARC 10

*Laboratory of Data Analysis*

- Dealing with random errors in data and the reconstruction of that data
- Decision support in the event of natural disasters
- Using expert systems
- Production rules
- Mathematical logic (non-classical logic) -- similar to fuzzy logic, but different since it is a noncontinuous logic

*Laboratory of Systems Support of Fundamental Research*

This organization provides software services to the research institutes. The laboratory is setting up a number of services for the research community as summarized below:

- The aims of the information network are as follows:
- Creation and accumulation of information resources
- Information and computing service and support of foundation investigations
- Organization of computational and information communications
- Support on-line and off-line access to the global Russian and international data bases, library (Email, FTP and http access)
- Support of communications among scientists
- Integration computing (hardware and software) and memory for solving scientific problems
- Creation and support of electronic publications (contents of journals, monographs and proceedings of conferences); an electronic notice board and notices about seminars, conferences, etc.; full text databases; abstracts, full texts of working papers, dissertations, preprints; and electronic journals) in English and Russian
- Stimulating the participants to master new informational technologies
- Creation of databases on the intellectual potential of the Siberian mathematicians (Directory of Siberian Mathematicians) and mathematical organizations (WWW-access, FTP-access)
- Notice board (conferences, seminars and other events) and teleconferencing
- Remote access to supercomputers

- Information Service (Information Data Bases) -- At the base of the
ICT SB RAS the information servers (WWW, FTP & Email access) will
be created that contain the following information systems:
- Contents of mathematical journals -- "Current Contents" (NIS, SB RAS, NA-Net, Informregister etc.) (WWW, FTP and Email access)
- Notice board (conferences, seminars and other events) (WWW, FTP and Email access)
- "Teleconference" of Siberian and Far Eastern mathematicians SM-Net (mathematical digest, electronic communications, publications, etc.) (WWW, FTP and Email access)
- Brief passports of the institutes of mathematical profile with reference to the electronic addresses of the institutes (WWW, FTP and Email access)
- Directory of Siberian and Far Eastern mathematicians (similar EMIR system) with references to electronic addresses of the mathematicians (WWW, FTP and Email access)
- Electronic versions of the "Siberian Mathematical Journal" and the journal "Computational Technologies"
- On the basis of the ICT SB RAS a file server containing licensed software obtained through the project and from other sources will be created
- A library database will be created on the annotations of publications
- Provision of systems of preparation of documents and mathematical texts including TEX-service, exchange and access to own and outside services, use by Russian and international (databases, information systems, systems of computer algebra, applied mathematical packages -- software not requiring purchases of licenses)
- Support the control problems of SB RAS
- Creation distribution hypertext data bases (multi-media information, geoinformation)
- Electronic access to the literature
- Current contents (journals, books and other)
- Electronic publication (electronic journals, reports, preprints, books)
- TEX-mirror (FTP and Email access) containing CTAN (Comprehensive TEX Archive Network) archive of editor system TEX for author's and publisher's preparation (formats LATEX, AMS-TEX, AMS-LATEX and plain) of mathematical texts in English and Russian in MS-DOS, OS/2 and UNIX environments
- Training-consulting centers on telecommunications software and TEX-service

Chubarov, L. B., et al. 1992. "Using numerical modeling to evaluate
tsunami hazard near Kuril Island." *Natural Hazards* 5; 293-318.
Kluwer Publications, Netherlands.