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Tshantshapanyan A.A.,Russian Armenian Slavic University
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

In the framework of adiabatic approximation the energy levels and direct interband absorption of light in the falciform lens shaped quantum dot are studied. Analytical expressions for energy spectrum and wave functions of the electron are obtained. It has been shown, that the particle energy spectrum is equidistant, and dependence of energy on geometrical parameters has root character. Dependences of absorption coefficient and edge frequencies on geometrical parameters of a quantum dot are obtained in the strong quantization regime. Corresponding selection rules for quantum transitions are revealed. © 2012 SPIE. Source


Dvoyan K.G.,Russian Armenian Slavic University
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

In the framework of adiabatic approximation the energy levels and direct interband absorption of light in the ensemble of cylindrical quantum dots' having strongly oblate elliptical cross-section are studied. Analytical expressions for the energy spectrum and wave functions of the electron are obtained. For the "slow" subsystem effective potential approximation, parabolic and modified Poschl-Teller potentials are used. Low-energy levels in the energy spectrum are shown to be equidistant in both cases. Modified Poschl-Teller potential approximation allows taking into account violation of equidistance of energy levels for higher exited states. Absorption coefficient and edge frequencies are obtained in the strong size quantization regime. Corresponding selection rules for quantum transitions are found. © 2012 SPIE. Source


Gandzhumian V.,Russian Armenian Slavic University
Central Asia and the Caucasus | Year: 2015

The current stage in international relations is characterized by rapid intensification of competition in the energy sphere. The Russian-Ukrainian gas crisis of 2008-2009, as well as the conflict around Ukraine at the current stage are pushing energy supply security, one of the most important concepts in scientific literature, into the foreground. The primary importance of this concept in the increasingly unstable and rapidly changing global economy is promoting the creation of new geopolitical and geo-economic advantages for the transit countries. Moreover, uninterrupted production and safe transportation of oil and natural gas are becoming important for guaranteeing the stability of the largest economies. This article looks at the ways to diversify gas deliveries to Europe, the geopolitical consequences of and Europe’s reaction to implementation of the Turkish Stream gas pipeline, and Turkey becoming the largest transit country and most important gas hub for Europe. Identifying and studying the above topics will be beneficial for drawing up a pragmatic policy that meets current reality. © 2015, CA and CC Press AB. All rights reserved. Source


Gianjumian V.,Russian Armenian Slavic University
Central Asia and the Caucasus | Year: 2014

The main international actors will pay much more attention to the Central Asian countries as the closest neighbors of Afghanistan, which are unlikely to remain on the periphery of world processes; this has invigorated and will further invigorate their regional activity. oday, the Southern Caucasus is best described as a scene of geopolitical battles among Russia, Turkey, and Iran, as well as between the United States and the European Union. Each of the actors is pursuing its own political interests and nurturing its own ideas about the routes leading to the region’s stability and its incorporation into the world community. To achieve this and to arrive at pragmatic political decisions fully tuned to the geopolitical realities, political scientists and other experts in international relations must study and identify the geopolitical trends prevailing in the Southern Caucasus in the context of Turkish geostrategy in the region. The author analyzes the transformations in Turkey’s foreign policy based on the Zero Problems with Our Neighbors policy formulated by the republic’s former Foreign Minister Ahmet Davutoğlu, which make Turkey’s more active involvement in all spheres of its foreign political activities, building the Ankara-Tbilisi-Baku geopolitical axis as part of the Zero Problems with Our Neighbors policy, and establishing relations with Armenia a far from simple process. The first steps along this road have been taken: Turkey has formulated a Caucasus Stability and Cooperation Platform; Armenia and Turkey have signed a roadmap and the Zurich Protocols (the ratification of which was suspended by the National Assembly of Armenia), while Ankara has been seeking brokerage in the Karabakh conflict. Source


Hayrapetyan D.B.,Russian Armenian Slavic University | Hayrapetyan D.B.,State Engineering University of Armenia | Hovhannisyan L.T.,State Engineering University of Armenia | Mantashyan P.A.,Armenian National Academy of Sciences
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2013

The analysis of complex spectra is an actual problem for modern science. The work is devoted to the creation of a software package, which analyzes spectrum in the different formats, possesses by dynamic knowledge database and self-study mechanism, performs automated analysis of the spectra compound based on knowledge database by application of certain algorithms. In the software package as searching systems, hyper-spherical random search algorithms, gradient algorithms and genetic searching algorithms were used. The analysis of Raman and IR spectrum of diamond-like carbon (DLC) samples were performed by elaborated program. After processing the data, the program immediately displays all the calculated parameters of DLC. © 2013 SPIE. Source

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