Contents

 Networking, Grid technologies, computing, and information support

 Software and computer complexes for experimental data processing

 Methods and numerical algorithms for modeling magnetic systems

 Methods and tools for modeling physical processes and experimental data analysis

 Numerical algorithms and software for simulation of complex physical systems

 Methods, algorithms, and software of computer algebra

 Other research

 Bibliography

 

 

The present issue of the Scientific Report of the Laboratory of Information Technologies (LIT) contains the most important results obtained during the 2004-2005 years within the direction of research Networking, Computing, Computational Physics.

The main tasks of the Laboratory of Information Technologies consist in the provision with both modern telecommunication, network, and information resources and mathematical support of the theoretical and experimental studies conducted by the JINR, Member State institutes at JINR, and other scientific centers.

The provision of JINR with high-speed telecommunication data links has had as the major target getting the 1 Gbps JINR-Moscow data link operational during the 2005 year. All the necessary equipment was already deployed such that, at the beginning of November, the test runs started. This achievement will secure significant increase of the total network traffic which reached 40 Tb both in the ingoing and outgoing directions during the first ten months of 2005 under a 45 Mbps JINR-Moscow link.

The creation of a high-speed, reliable and protected LAN has progressed significantly as it concerns the controlled access at the network entrance and the fluidization of the local traffic. The crucial problem of securing the LAN protection involved the development of network monitoring tools able to accomplish the look-ahead assessment of the entire network environment.

The creation of distributed high-performance computing infrastructure and mass storage resources is centered around the JINR Central Complex for Information and Computing support (CCIC) as a core of the distributed infrastructure. With the last acquisitions, the CCIC JINR comprises 130 CPUs, 17TB RAID-5, and 39TB Certon100 disk memory storage.

The traditional provision of information, algorithmic and software support of the JINR research-and-production activity included a large spectrum of activities both at the LIT and JINR levels. Hard work was undertaken towards systematic development and maintenance of the earlier designed databases and information systems taking into account the user needs. Work was also in noticeable progress on the development of WWW tools on the JINR and LIT main information servers: www.jinr.ru and lit.jinr.ru. Members of the LIT staff provided necessary work for the JINR's STD AMS on the software and centralized support of administrative databases.

The elaboration of the JINR Grid segment and its inclusion in the European and global Grid structures has had as directions of activity the participation in LHC Computing GRID Project (LCG), the development of LCG/EGEE infrastructure, the participation in the development of the Russian Tier2 Cluster, Grid middleware evaluations, participation in the LHC Projects ALICE, CMS, and ATLAS. Last but not least, the development of "Dubna-Grid" project, partially financed by grants from the town of Dubna and the Russian Foundation for Basic Research, aimed at the creation of a distributed environment of metacomputing on the basis of non-loaded computing resources of "office" computers (about 1500 units) in the "Dubna" University, secondary schools and other high educational organizations in Dubna.

The mathematical support of experimental and theoretical studies conducted by JINR can be summarized in a few lines as follows:

 mathematical description and algorithmic reformulation of the physical models such as to meet the requirement of computing the solution in polynomial time;

 development of methods and algorithms able to extract physically insightful information from experimental data;

 simulation of physical processes within experimental installations;

 creation of efficient and reliable hardware adapted software;

 return of meaningful outputs able to give insight into the input physical problems.

The Laboratory staff participated in research work done within 16 topics at the project level and within 16 topics at the cooperation level inside JINR.

The main results have been published in leading scientific journals, proceedings of scientific conferences, JINR preprints and JINR communications.

A number of scientific projects involving members of LIT staff have been financed by grants afforded by the Commission of the European Community in the frames of the EU-Russia collaboration and INTAS. Thirteen grants were afforded by the Russian Foundation for Basic Research. Among them, seven were directed to the creation and development of information, computing and telecommunication infrastructure, while six supported various projects of scientific interest.

LIT was the main organizer of the International Conference "Distributed Computing and Grid Technologies in Science and Education", Dubna, June 29 - July 2, 2004, XI International Conference "Mathematics. Computer. Education", Dubna, January 26-31, 2004, 9-th Workshop on Computer Algebra "DUBNA 2005'', Dubna, May 17-18, 2005, 3-rd International Workshop "Quantum Physics and Communication", Dubna, 26-30 June, 2005, Workshop on a current status of the "Dubna-Grid'' Project, Dubna, 21 July, 2005, and one of the organizers of the XX International Symposium on Nuclear Electronics & Computing "NEC'2005", Varna, Bulgaria, 15-20 September, 2005.

A third issue of the "Information Bulletin of LIT" (JINR, 4-8255, Dubna, 2005, http://lit. jinr.ru/Inf_Bul_3/) was published.

It is our hope that the results of the research work collected in this report will be useful to the scientific community of JINR and JINR Member States to throw new bridges for joint scientific collaborations in the years to come.

The Editors