KATCHAR
SCIENTIFIC PERIODICAL
II, 2019
Recommended by the Scientific Council of the International
Scientific–Educational Center of NAS RA
ARAM PAPOYAN
Doctor of Physics and Mathematics, Corresponding Member of NAS RA
RECOIL EFFECT IN LASER SPECTROSCOPY OF ALKALI METAL ATOMS
Abstract
We have analyzed the influence of the mechanical momentum acquired by atoms when interacting with resonant laser radiation (atomic recoil effect) in the spectroscopy of alkali metal atoms. Direct quantitative measurements are done using a sodium atomic beam setup. A 1.3 mm deflection of atoms on a distance of 890 mm downstream the beam was detected with 7.5 mW power of deflection laser radiation, corresponding to ≈ 300 cm/s transversal recoil velocity acquired by atoms. Power dependence of deflection exhibited square-root low caused by the Doppler walk-off of the resonance frequency with the increase of the lateral velocity. The possible influence of recoil effect in high-resolution atomic spectroscopy is discussed. The obtained results are used to evaluate the case of interaction of laser radiation with gaseous media. Corresponding estimates are done for the laser spectroscopy of nanocells containing atomic vapor of alkali metals, where the strongest impact of recoil phenomenon is expected.
Keywords: atomic recoil; laser spectroscopy; fluorescence; resonant interaction; Doppler effect; atomic beam; alkali atoms; optical nanocells.
ARMAN SIMONYAN
4th year Bachelor student
American University of Armenia
ANI STEPANYAN
PhD in Biological Sciences, Researcher
ANALYSIS OF TRANSCRIPTOME CHANGES IN RESPONSE TO HEAVY METALS USING SELF-ORGANIZING MAPS
Abstract
In this study, we have performed self-organizing maps (SOM)-based clustering and functional annotation of gene expression in hepatoma cell lines exposed to cadmium, nickel and arsenic using publicly available microarray data. The results show that cadmium and nickel exposure is associated with overexpression of genes related to hypoxia and oxidative stress response, while arsenic causes up-regulation of tumorigenesis related pathways. This data suggests that changes in gene expression profiles upon exposure highly depend on the type of heavy metal.
Keywords: Self-organizing map, gene expression data, functional annotation, carcinogenesis, hepatoma cell line HepG2.
AREG HUNANYAN
PhD in Physical and Mathematical Sciences
ANDRANIK KAMALYAN
PhD in Physical and Mathematical Sciences
INSTABILITY OF A NORMAL SHEAR (SH) WAVE IN A WEAKLY INHOMOGENEOUS ELASTIC LAYER
The article studies the effects of longitudinal weak heterogeneity of the material, as well as the geometric weak heterogeneity of the elastic layer surfaces on the normal shear wave, under various mechanical boundary conditions. It is shown, that in case of hard-clamped smooth surfaces of an isotropic elastic layer, the asymmetric localization of the wave energy occurs near the middle plane of the layer. In case of mechanically free smooth surfaces, the localization of the wave energy occurs in the near-surface zones. But more intensively the localization appears again near the middle plane of the layer. In both cases, due to the material inhomogeneity influence on the normal wave, two new cramped frequencies appear. In case of weakly inhomogeneous mechanically free surfaces, the frequency transmission zones of the formed wave (as well as frequency default zones) and localization in the near-surface layers of heterogeneity appear.
GRIGOR BARSEGIAN
Doctor ofPhysics and Mathematics
INITIATING STUDIES OF ZEROS OF SOLUTIONS OF SOME BASIC DIFFERENTIAL EQUATIONS
Despite the fact that the zeros of solutions of ordinary differential equations were widely studied, we were not able to find publications concerning zeros of solutions of the basic equations 
. A recent principle of zeros giving bounds for the number of zeros of real functions permits to initiate similar studies.
Also, we consider some large systems of equations; both autonomous and non-autonomous. Particularly we study the well-known system of equations 
, where 
and 
are arbitrary polynomials. For an arbitrary solution 
of this system we give upper bounds for the number of zeros of 
and/or
occurring on the segment 
.
Keywords: Zeros of solutions of equations.
ALEXEY KUZNETSOV
Doctor of Economics, Corresponding Member of RAS
INION RAN ON THE BACKGROUND OF THE NEW STANDARDS FOR PUBLICATION ACTIVITY OF RUSSIAN SCIENTISTS
The article is devoted to the current situation of one of the leading Russian academic institutions - Institute of Scientific Information for Social Sciences of the Russian Academy of Sciences (INION RAN). Adaptation to the new standards for the publication activity of Russian scientists of INION RAN two main areas of specialization - research and library-bibliographic work is considered. Particular attention is paid to the advantages and disadvantages of assessing scientists and organizations in the social sciences by science-based indicators.
A critical analysis of the current state policy of predominant use in the assessment of Russian scientists of the science-based instruments developed in the USA (Web of Science, DOI index, etc.) is given. More adequate measures are proposed to evaluate the publication activity of Russian scientists and the possible place of INION RAN in their implementation is shown.
ALVARD SEMIRJYAN-BEKMEZYAN
PhD in Philological Sciences, Associate Professor
POPULISM AND FICTION
The article deals with contemporary perceptions, manifestations and the interaction of populism with culture, in particular, with literature.
Three issues are mainly considered in the context of populism and literature: literature, becoming an instrument in the hands of the ruling class, can acquire populist accents, literature can participate in the formation and dissemination of populist ideology, and finally, literature itself can be populistic.
At the same time, literature as a phenomenon of documentation and reflection of reality is also a system of planning and coding of the same reality.
VLADIMIR MIKAELYAN
Doctor of Psychology
THE SENSE OF CORPORALITY AND THE SENSE OF “I” IN THE CONTEXT OF THE FUNCTIONING OF PSYCHE LEVELS
Each of us, regardless of our life and professional interests, from time to time faces what we call the “I” problem. A far far-fetched problem periodically positions itself before us, whether or not we want it at all. How do we understand what we are thinking about? How do we understand our “I”? What do we associate this concept with and are there autonomous boundaries for this concept? We can find almost a few hundred definitions of the concept of “I”, each of which reveals a certain facet of this concept. We consider the following to be right: to understand what we can conceive, speaking of our "I", we need to find out what correlates our I. After all, one way or another we define this concept in relation to other psychic constructs. This concept is not self-sufficient, for its definition it needs some correlation. It seems to us that this specific construct design can be corporality.
KAREN SARGSYAN
PhD in Economic Sciences, Associate Professor
THE ISSUES ON IMPROVING INVESTMENT POLICY
IN THE REPUBLIC OF ARMENIA
IN THE CONTEXT OF ENSURING INCLUSIVE ECONOMIC GROWTH
One of the most important prerequisites for sustainable economic progress is the promotion of inclusive economic growth and in this regard public investment policies are important which will allow both foreign and local investment flows to be channeled into strategic, knowledge-intensive and resource-saving sectors of the economy, whose development in turn will stimulate sustained economic development. In this respect, there is a need for scientifically sound and systematic reforms to develop market economy institutions, improve the legal framework and define new principles and approaches to investment policies.
NAIRA SAFARYAN
PhD in Pedagogy, Associate Professor
MANAGEMENT PRINCIPLES OF HIGH SCHOOL
The work is dedicated to high school management principles. The basic marker of school and out of school management is its activity and development The principles of school management are presented in accordance with certain characteristics. On our part, the following groups of characteristics were noted: principles of the school and out-of-school management of the high school, principles of educational and out-of-school management of the school.
