|Archive of LIT seminars (2012)|
|November 15, 2012, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
E.A. Kuraev, O.O. Voskresenskaya, and A.V. Tarasov: "Coulomb Correction to the Screening Angular Parameter of the Moli'ere Multiple Scattering Theory"
Coulomb correction to the screening angle of the Moli'ere multiple scattering theory is found within the small-angle approximation. More... ( PDF )
|November 01, 2012, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
D.A. Soloviev (Tver SU): "Mathematical models of gravitating charged scalar configurations"
(materials of a PhD thesis)
|October 26, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
1. S.V. Mitsyn and G.A.Ososkov: "Method for iterative determination of coordinates of spacecraft location"
An iterative method has been proposed for solution to an inverse problem by determination of unknown coordinates of a space vehicle according to TDOA measurements - the difference on the propagation time of signals from several ground transmitting stations at their retranslating by known and unknown satellites and registration by a receiving ground terminal. More... ( PDF )
2. R.M. Yamaleev: "Riccati- Abel equation and its interrelation with general complex algebra"
The Ricati equation and its generalizations are one of the widely used equations of mathematical physics. In the present contribution we explore the generalized Riccati equation containing a cubic polynomial. More... ( PDF )
|September 19, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
"Isotropic and Anisotropic Dark Energy Models"
In this review we have studied the evolution of the universe filled with dark energy with or without perfect fluid. In doing so we considered a number of cosmological models, namely Bianchi type I, III, V, VI0, VI and FRW ones. For the anisotropic cosmological models we have used proportionality condition as an additional constrain. More... ( PDF )
|August 10, 2012, at 11.00 ( LIT, r.310 ) the seminar LIT will be held: |
I. Szabó, C. Török: "Smoothing data with piecewise polynomial surfaces"
We propose a mathematical model for smoothing data with piecewise polynomial surfaces. Part of the coefficients of the model for a surface segment is defined by a system of reference points that ensure smooth connection. The algorithm works in both online and offline mode. The results of data smoothing with the proposed method and B-splines are compared.
|August 09, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
C. Rubbia, D. Salmieri (CERN), A. Chervyakov (LIT), A. Marian, H. Thomas (IASS): "New Superconducting Approach to High-Power, Very Long-Distance Energy Transmission Based on Superconducting MgB2 Cables".
|July 13, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
1. N.D. Dikusar: " Piecewise polynomial approximation of the sixth
order with automatic knots detection"
Coefficients of a local segment model for piecewise polynomial approximation of the sixth order are evaluated using values of the function and of its first derivative at three knots of the support. More... ( PDF )
2. A.V. Melezhik: "Application of parallel programming in MPI
for calculation of matrix elements of some
operators in ostsillyatorny basis"
3. A.V.Kinzhalov, S.K.Slepnyov: "Clustering of two-dimensional discrete distributions with the employment of smoothing by the basic elements method"
|June 22, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
A.V. Smirnov (Research Computing Center Moscow State University): "A complex of algorithms and programs for computing
Feynman integrals are fundamental quantities used in particle physics. The evaluation of Feynman integrals remains an important problem. On the other hand, mathematical concepts arising during this evaluation are of interest on their own. Moreover, to solve those problems one needs to develop proper algorithms and programs. More... ( PDF )
|June 19, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
Zlokazov V.B., Utyonkov V.K.: "Concept of the optimum confidence interval in the analysis of rare events"
In the analysis of rare events a typical question is as follows: does an observed event ti have a distribution, depending on a certain parameter. The question is answered by a region of the (0, t) axis (a confidence interval), into which the event ti gets with an a priori probability Р.
More... ( PDF, Russian )
|April 25, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
I.N. Kijan (Laboratory of Nuclear Problems): "Technique of mathematical modeling of new operating modes of multi-purpose
isochronous cyclotron AIC-144"
(materials of a PhD thesis)
|April 18, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
н (ООО "Андер Девелопмент", Москва):
"Символьные алгоритмы и программы вычисления булевых базисов Грёбнера"
(по материалам кандидатской диссертации)
Булевы базисы Гребнера являются универсальным алгоритмическим инструментом решения задач алгебраического криптоанализа и булевой выполнимости. Еще одним многообещающим применением таких базисов является моделирование квантовых вычислений на классическом компьютере.
More... ( PDF )
|April 16, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
T.P.Akishina: "Development of methods for electron identification with the help of the transition radiation detector in the CBM experiment"
(materials of a PhD thesis)
|April 10, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
V.V.Kornyak (Laboratory of information technologies) : "Classical and quantum discrete dynamic systems"
1. Discrete dynamic systems with symmetries;
2. A discrete version of the principle of calibration invariancy;
3. A relationship between discrete systems and their continuum approximations: appearance of existential structures, continuous symmetries, etc.;
4. Specificity of behaviour of deterministic discrete systems: soliton - like structures, convertibility, unitarity, etc.;
5. Constructive analysis of quamtum-mechanical behaviour.
|January 18, 2012, at 11.00 ( LIT, r.407 ) the seminar LIT will be held: |
G.E. Kozlov: "Research on algorithms of the response clusterization of detectors with a cell structure"
We discuss clustering methods and their application to processing responses of the detectors with a pad structure used
in the high energy physics experiments.
Hierarchical and iterative methods are described. We discuss advantages, disadvantages and applicability of the methods to a particular
task. Ward and single linkage methods are considered to be the most appropriate chose for our problem. It was compared with existing
methods taking into account accuracy, efficiency and speed of each algorithm. The novel clustering algorithm which takes into account
the peculiarities of our task was developed. Simulation studies that we conducted showed that developed algorithm has the best performance
in comparison with standard Ward and single linkage methods.
|January 12, 2012, at 15.00 ( LIT, r.407 ) the seminar LIT will be held: |
A.S. Galoyan, V.V. Uzhinsky: "Development of GEANT4 package"
The recent directions of the experimental setups simulation package, GEANT4, will be presented:
1. The FRITIOF (FTF) model and the physics list FTFP_BERT;
2. Simulation of antinucleus – nucleus interactions (parts of the report presented at the Rutherford conference devoted to the 100-th anniversary of the atomic nucleus discovery).
Awarded were M.G.Mescheryakov, N.N.Govorun by LIT and JINR grants provided for
young scientists and specialists for 2012 in accordance to their applications of the year
a) congratulations to LIT grant-aided winners,
b) congratulations to JINR winners of competition
|Archive of LIT Seminars (2011)