23 research outputs found
Legislative basis of the rights and interests protection of ethnic groups in modern Kazakhstan
Kazakhstan is the multiethnic and multi-religious country on territory of the former Soviet Union. The country became independent in 1991 and built a democratic, legal state, where the highest values are freedoms, rights and interests of citizens. One of the main tasks of strengthening the sovereignty and stability is protection of the rights and interests of ethnic groups and minorities. The country has created and developed the constitutional, legislative and institutional basis protecting the rights of ethnic groups. Modern democratic Constitution, the laws on language, education, NGOs, the media protect the rights and interests of ethnic groups and minorities in Kazakhstan. The legislative framework allows ethnic groups to freely use, study their language, culture and traditions. Restrictions of the rights and freedoms of ethnic groups and minorities, discriminations on the base of language, ethnicity, religion are nit allowed by Constitution and laws. Well-developed legislature regulates the legal basis of use of the two major languages of the country: the Kazakh language and Russian language
Numerical Solution of the Time Dependent 3D Schrödinger Equation Describing Tunneling of Atoms from Anharmonic Traps
We present an efficient numerical method for the integration of the 3D Schrödinger equation. A tunneling problem of two interacting bosonic atoms confined in a 1D anharmonic trap has been successfully solved by means of this method. We demonstrate fast convergence of the final results with respect to spatial and temporal grid steps. The computational scheme is based on the operator-splitting technique with the implicit Crank-Nicolson algorithm on spatial sixth-order finite-differences. The computational time is proportional to the number of spatial grid points
Luminosity and Mass Function of the Galactic open cluster NGC 2422
We present UBVRI photometry of the open cluster NGC 2422 (age yr)
down to a limiting magnitude . These data are used to derive the
Luminosity and Mass Functions and to study the cluster spatial distribution. By
considering the color-magnitude diagram data and adopting a representative
cluster main sequence, we obtained a list of candidate cluster members based on
a photometric criterion. Using a reference field region and an iterative
procedure, a correction for contaminating field stars has been derived in order
to obtain the Luminosity and the Mass Functions in the
range. By fitting the spatial distribution, we infer that a non-negligible
number of cluster stars lies outside our investigated region. We have estimated
a correction to the Mass Function of the cluster in order to take into account
the "missing" cluster stars. The Present Day Mass Function of \ngc2422 can be
represented by a power-law of index (rms) -- the
Salpeter Mass Function in this notation has index -- in the
mass range . The index and the total
mass of the cluster are very similar to those of the Pleiades.Comment: 12 pages, 8 ps figures, in press in Astronomy and Astrophysic
Parallaxes and proper motions for 20 open clusters as based on the new Hipparcos catalogue
A new reduction of the astrometric data as produced by the Hipparcos mission
has been published, claiming that the accuracies for nearly all stars brighter
than magnitude are improved, by up to a factor 4, compared to
the original catalogue. As correlations between the underlying abscissa
residuals have also been reduced by more than an order of magnitude to an
insignificant level, our ability to determine reliable parallaxes and proper
motions for open clusters should be improved. The new Hipparcos astrometric
catalogue is used to derive mean parallax and proper motion estimates for 20
open clusters. The HR-diagrams of the nearest clusters are compared and
combined to provide future input to sets of observational isochrones. The
positions of the cluster HR diagrams are consistent within different groups of
clusters shown for example by the near-perfect alignment of the sequences for
the Hyades and Praesepe, for Coma Ber and UMa, and for the Pleiades, NGC 2516,
and Blanco 1. The groups are mutually consistent when systematic differences in
are taken into account, where the effect of these differences on
the absolute magnitudes has been calibrated using field-star observations.Comment: 34 pages, 36 figures, 7 tables. Accepted for publication by A&
New debris disk candidates: 24 micron stellar excesses at 100 Myr
Sixty three members of the 100 Myr old open cluster M47 (NGC 2422) have been
detected at 24 micron with Spitzer. The Be star V 378 Pup shows an excess both
in the near-infrared and at 24 micron (K-[24] = 2.4 mag), probably due to
free-free emission from the gaseous envelope. Seven other early-type stars show
smaller excesses, K-[24] = 0.6-0.9. Among late-type stars, two show large
excesses: P922 - a K1V star with K-[24] = 1.08 pm 0.11 and P1121 - an F9V star
with K-[24] = 3.72 pm 0.02. P1121 is the first known main-sequence star showing
an excess comparable to that of beta Pic, which may indicate the presence of an
exceptionally massive debris disk. It is possible that a major planetesimal
collision has occurred in this system, consistent with the few hundred Myr time
scales estimated for the clearing of the Solar System.Comment: 14 pages, 3 figures, accepted to the special Spitzer issue of the
ApJ
Tunneling of Two Interacting Fermions
We consider two interacting atoms subject to a one-dimensional anharmonic trap and magnetic field gradient. This system has been recently investigated by the Heidelberg group in the experiment on two 6Li atoms. In the present paper the tunneling of two cold 6Li atoms, initially prepared in the center-of-mass and relative motion excited state, is explored and full time-dependent simulation of the tunneling dynamics is performed. The dynamics is analyzed for the interatomic coupling strength ranging from strong attraction to strong repulsion
Numerical Solution of the Time Dependent 3D Schrödinger Equation Describing Tunneling of Atoms from Anharmonic Traps
We present an efficient numerical method for the integration of the 3D Schrödinger equation. A tunneling problem of two interacting bosonic atoms confined in a 1D anharmonic trap has been successfully solved by means of this method. We demonstrate fast convergence of the final results with respect to spatial and temporal grid steps. The computational scheme is based on the operator-splitting technique with the implicit Crank-Nicolson algorithm on spatial sixth-order finite-differences. The computational time is proportional to the number of spatial grid points