|Archive of LIT seminars (2011)|
|December 23, 2011, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
I. Kulakov, S. Baginyan, V. Ivanov, P. Kisel: "Performance analysis of a cellular automaton algorithm for the solution of the track reconstruction problem on a
multi-core server at LIT JINR"
The results of tests for the tracks reconstruction efficiency, the speed of the algorithm and its scalability with respect to the number
of cores of the server with two Intel Xeon E5640 CPUs (in total 8 physical or logical cores) are presented and discussed.
|December 22, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
R.M. Yamaleev: "General complex number and its applications in geometry and physics"
The geometrical and physical meaning of general complex number is explained. Interconnections with solutions of Riccati equation and Mobius transformations are established.
Applications in the Poincare model of hyperbolic space and in the relativistic mechanics is demonstrated.
|November 24, 2011, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
E. Alexandrov, V. Kotov, V. Uzhinsky, P. Zrelov: "HEPWEB - WEB Page for Monte Carlo Simulations in High Energy Physics"
A WEB-page HepWeb allows a user to perform the most popular calculations in high energy physics -- calculations of hadron-hadron,
hadron-nucleus and nucleus-nucleus interaction cross sections and calculations of secondary particles characteristics in the interactions using Monte Carlo event generators.
More... ( PDF )
|November 17, 2011, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
1. Professor Vasile Buzuloiu (Romania, Bucharest, University Politehnica Bucuresti):
"Image analysis and processing laboratory of the University Politehnica Bucuresti"
2. Dr. Alina Sultana, Associate professor at LAPI-UPB in the domain of medical applications of image analysis and processing: diagnosis of brestcancer and osteoporosis:
"Medical applications of image analysis and processing: diagnosis of brestcancer and osteoporosis"
3. Dr. George V. Popescu (National Institute for Laser Plasma and Radiation Physics and University Politehnica Bucuresti):
"Computational and biophysical methods for comprehensive characterization of molecular interactions in cellular networks"
More... ( PDF)
|October 19, 2011, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
O.A. Afanasyev1, P.V. Zrelov1, V.V. Ivanov1, R.V. Polozov2, V.S. Sivogelezov3,
V.A. Stepanenko1, Yu.N. Chirgadze4
1 Laboratory of information technology, 2 Institute for Theoretical and Experimental Physics of RAS, Pushchino,
3 Institute of Cell Biophysics RAS, Pushchino, 4 Institute of Protein RAS, Pushchino.
"A Software Complex for the Map-Making and Research of Proteins and Nucleic Acids"
A software complex with a suitable graphic interface has been designed for cartography and studies of the surface of globular proteins, helix chains of proteins, DNA,
and RNA on the basis of PDB files within the Windows environment.
More... ( PDF )
|September 08, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
1. Ivan Hristov, Stefka Dimova
(Sofia University "St. Kl. Ohridski", FMI, Sofia, Bulgaria): "Numerical Investigation of Fluxon Interactions in Josephson Stacks"
We study numerically the possibility a coherent (bunched) motion of fluxons allocated at different tunnel barriers of N -layered (N ≥ 3) long
Josephson stacks to exist in the absence of external magnetic field. The stability of such configurations is analyzed. It is shown that a system
of bunched fluxons reflects from the ends of the junctions without being destroyed. The investigation is made in the frame of the Sakai-Bodin-Pedersen
model of N-stacked inductively coupled Josephson junctions. Finite difference methods are used to solve the system of nonlinear hyperbolic (perturbed sine-Gordon) equations.
The accuracy and the conservative of the method are investigated numerically.
2. N. Kolkovska (Institute of Mathematics and Informatics Bulgarian Academy of Sciences, Sofia, Bulgaria) "Finite Difference Schemes for Boussinesq Paradigm Equation".
More ( PDF )
|August 25, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
1. Nina Bogdanova, Stefan Todorov (Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia): "Orthonormal polynomial
approximation of water drop evaporation data with errors in two variables"
It is presented the investigation for fitting drop water evaporation data as a result of original microscope observations. Our approximation algorithm with construction
of orthonormal polynomials (orthonormal polynomial expansion method- OPEM) is applied for data with uncertainties in both independent and dependent variables. For this purpose our numerical method is developed here to include the both errors. We also review its principles
and analyze the orthonormal and "usual" expansions of the approximating function.
2. T.N. Kupenova (Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia): "An Inductive Algorithm for Smooth Approximation of Functions"
An inductive algorithm is presented for smooth approximation of functions based on the Tikhonov regularization method, applied for specific kind of the Tikhonov
parametric functional. The discrepancy principle is used for estimation of the regularization parameter. The principle of
heuristic self-organization is applied for assessment of some parameters and the optimal complexity of the approximating function.
|August 19, 2011, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
A.R. Panchenko (National Center for Biotechnology Information, National Institutes of Health, Bethesda, USA):
"Caught in interactions: evolution and regulation of protein-protein binding"
|August 18, 2011, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
1. Lukáš Miňo, Csaba Török: "Knot detection for piecewise smoothing"
Knot detection is a central step in piecewise parametric approximation and smoothing for both local and global case.
We propose an interactive Web application for selecting the knots in successive regime based on reference points.
2. Csaba Török: "On computational problems of cubic splines"
Recently we proposed a class of reference point based piecewise polynomial schemes for approximation and smoothing.
We show that it’s enhanced version is comparable with cubic B-splines. The question of the last one’s ortogonality is discussed.
|August 17, 2011, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
N.D. Dikusar: "About Сhange of Сoefficients of the Taylor Polynomial On a Three-Point Grid"
Given a function f(x) with the argument x running over the
interval [x0 − h, x0 + h], coefficients of its expansion in a
Taylor polynomial over this range are obtained in terms of the values and derivatives of f(x) at x0 − h, x0,
and x0 + h. The obtained result secures the decrease of the error bound associated to the approximation of f(x) by the
Taylor polynomial, with vanishing errors at the interval boundaries.
|July 15, 2011, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
A. S. Gevorkyan: "A new parallel algorithm for simulation of spin glasses on scales of space-time's periods of external fields with consideration of relaxation effects"
We have studied critical properties of a spin glass depending on external field parameters (frequency and amplitude) with taking into account relaxation effects. Mathematically the problem is formulated in the framework
of complex-valued Heisenberg 1D Hamiltonian. More information ( PDF )
|June 29, 2011, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
I. R. Lomidze (University of Georgia, Tbilisi, Georgia): "Some properties of the generalized euler beta function"
A generalization of the Euler beta function for the case of multi-dimensional variable is proposed. In this context the usual one is defined as a function of
two-dimensional variable. The analogue of the Euler formula for this new function is proved for arbitrary dimension. There is found out the connection of defined function
with multi-dimensional hypergeometric Laurichella’s function. The results obtained are applied to analytic calculation of some new definite integrals of special functions.
|June 15, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
A.V. Bobchenkov: "Models and methods of resource management for virtual organizations in distributed computing"
The problem of efficient scheduling mechanism elaboration is considered actual in the field of distributed computing.
The author proposes a model of virtual organization unifying users, computational node owners and administrators that establish policies for resource sharing
and consumption in a distributed computing environment. More information ( PDF )
|June 09, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
V.V. Galaktionov: "GridCom, GridCommander: graphical interface for Grid Jobs and Data management"
GridCom - the software package for maintenance of automation of access to means of distributed system Grid (jobs and data).
The client part, is executed in the form of Java-applets, realises the Web-interface access to Grid through standard browsers.
The executive part Lexor (LCG Executor) is started by the user in UI (User Interface) machine providing performance of Grid operations.
More information ( PDF )
|May 17, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
A.S. Yefimov (N.I. Lobachevsky State University of Nizhni Novgorod): "A method for estimating individual drug doses based on adaptive fuzzy models"
(Materials of a PhD thesis)
A four-stage method for estimating individual drug doses is proposed. The method is reduced to the construction and use of zero-order Takagi-Sugeno-Kang
adaptive fuzzy models based on empirical data. A method for the model identification (during data clustering with possible missing values), a hybrid parallel algorithm for the
model parametric optimization (combining the advantages of the immune clonal selection and particle swarm optimization algorithms), and a feature selection method are
developed. The model adequacy and effectiveness are demonstrated for some test and practical classification and medical diagnostic problems using performed software
implementation. Greater efficiency and safety of the method is demonstrated for estimating individual doses of radioiodine (131I) in the treatment of Graves' disease compared
to using known computational methods for dosimetric planning of radioiodine therapy.
|May 05, 2011, at 15.00 ( LIT Conference Hall ) the seminar LIT will be held: |
P.S. Berezovskiy (Keldysh Institute of Applied Mathematics RAS): "Job management in a grid with stand-alone resources"
(Materials of Master’s Thesis)
The author of the thesis examines the problem of job management within a distributed computing infrastructure composed of non-clustered shared resources.
A new approach has been developed to integrate numerous shared computers into united infrastructure in order to use them for mass computations. Use cases of such
infrastructures have been suggested as well.
The author has also proposed architecture of the management system for computing infrastructure consisted of shared computers. The architecture corresponds to the
principles and standards of grid.
A new scheduling method aimed at job completion in specified time has also been designed.
Software implementation of the dispatching system SARD (Stand-Alone Resource Dispatcher) has been implemented according to suggested architecture and methods.
Moreover, a pilot computing infrastructure was created and the calculations of practical tasks were made based on this infrastructure.
|May 04, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
D.K. Udumyan (MEPI): "Numerical methods of solving the problems of processing indefinite data with the help of complex schemesbased
on singular-spectral and metric analyses"
(Materials of a PhD thesis)
|April 21, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
V. V. Nikonov (Tver State University): "Mathematical Modeling and Stability Analysis of Spherically Symmetric Gravitating Scalar Configurations"
(Materials of Master’s Thesis)
In this report we consider static black holes and particlelike configurations of minimally coupled gravitating nonlinear scalar fields within general relativity.
More information ( PDF )
|March 24, 2011, at 11.00 ( LIT, r.407 ) the seminar-prezentation LIT will be held: |
Altium Company: "Altium Designer. Functionality overview, methods of work, development trends"
In presentation will be shown in detail all the distinctive features of Altium Designer, as well as the features of the schematic editor (SCH editor),
PCB editor, working with libraries, integration with mechanical CAD and more. More information ( PDF )
|March 17, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
E.A. Ayrjan, A.A. Egorov, E.N. Michuk, A.L. Sevastyanov, L.A. Sevastyanov, A.V. Stavtsev: "Representations of guided modes of integrated-optical multilayer thin-film waveguides in the method of comparison waveguides"
In the paper, a theoretical analysis of guided propagation (eigen) modes in the regular multilayer dielectric waveguides is help.
More information ( PDF )
|March 15, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
1. "Architecture of the local monitoring system of the resource centre"
The paper is devoted to developing the architecture of resource center monitoring system which tracks state of objects of different nature, accumulate data
about their work and notify of emergency situations. Given the basic system requirements, an information model of its components interaction was considered and
an architecture which implements the principles of universality, extensibility and adaptability of the system is proposed.
2. "Construction of the monitoring system of the JINR Central Information Computing Complex"
The paper considers the solution of problems encountered in constructing the system of local monitoring the CICC.
Certain applicated or developed methods and tools for collecting, storing, processing and visualization of information is described.
|March 10, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
A.S. Gevorkyan1,2, H.G. Abajyan1, H.S. Sukiasyan3: "New Parallel Algorithm for Simulation of Spin-Glass System
on Scales of Space-Time Periods of an External Field"
( 1IIAP NAS of Armenia, 1 P. Sevak Str., 0014 Yerevan, RA; 2JINR (LIT), 141980 Dubna, Moscow reg., Russia; 3Institute of Mathematics, NAS of Armenia, RA )
The averaging method by fractals structures is offered which allows calculating an average polarization of ensemble and a degree of its ordering. Finally it is shown that the average value of polarization and the ordering parameter depending on external field have a phase transitions of first order.
More information ( PDF )
|March 01, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
1. D.A. Oleynik: "ATLAS DQ2 Deletion Service"
The report describes the design and implementation of DQ2 Deletion Service – one of central data management service of ATLAS experiment. Special attention
is paid for organization of scalability, performance and availability of service.
2. A.Sh. Petrosyan: "Monitoring of ATLAS distribution data management Deletion Service"
Report will describe preconditions of the creation, technologies used and details of implementation of the application. In view of volume and high loading of the database,
special attention will be given to up-to-date ways of web-application optimization.
|February 24, 2011, at 15.00 ( LIT Conference Hall ) the seminar LIT will be held: |
Andrey Adinetz (SRCC MSU) : "Use of extensible languages for the graphics processor programming"
The report discusses the main features of extensible programming languages and the existing extensible languages.
Various opportunities of using the extensible languages for programming high-performance applications are considered as well as what way the author applies
the extensible language Nemerle for the graphics processor programming,
one of the classes of promising computing architectures.
|February 17, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT is devoted to the 80th anniversary of G.A. Ososkov's birth will be held: |
1. Ю.А. Горнушкин, С.Г. Дмитриевский, Г.А. Ососков, А.В. Чуканов: "Методы локализации вершины взаимодействия в трековой системе детектора OPERA"
2. С.В. Мицын, Г.А. Ососков: "Растущий нейронный газ и кластеризация данных большого объёма"
3. А.А. Лебедев, С.А. Лебедев, Г.А. Ососков: "Проблемы и алгоритмы реконструкции событий в детекторах СВМ для идентификации электронов и мюонов"
4. С.А. Лебедев, Г.А. Ососков, В.И. Редин: "Применение непрерывных вейвлет-преобразований для обнаружения и параметризации малых,
сильно зашумленных пиков"
|February 10, 2011, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
E.E. Perepelkin: "Boundary value problem for taken into account space charge effect of beam"
The article describes a new approach to solving the problem of taken into account the space charge effect. The mathematical formulation
of the problem is shown; a method for constructing solutions with the required order of accuracy is described. The analytical solutions for the some models are
obtained. Difference scheme is constructed for numerical simulations with different orders of approximation.
|January 13, 2011, at 16.00 ( Blokhintsev Hall, 4th floor ) the seminar BLTP will be held: |
I. Filozova, V. Borisovski, S. Kouniaev, G. Musulmanbekov, R. Semenov, G. Shestakova, P. Ustenko, T. Zaikina:
"OAI repository for scientific publications of JINR researchers"
In the framework of the international program OAI (Open Access Initiative) the electronic open access archive-repository JINR Document
Server (JDS) is built up. The main goal of JDS is to collect in JINR site all the publications of JINR researchers. The documents deposited in the repository
are preprints, journal articles, books, conference papers, conference announcements, theses, annual reports etc. Currently the retrospective publications of
JINR authors up to 1956 are deposited. JDS being integrated digital library system gives to users an opportunity to deposit manuscripts in self-archiving mode,
create personal catalogs, subscribe to alerts and RSS, send comments and arrange discussions on submitted papers.
|Archive of LIT Seminars (2010)