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Kiev, Ukraine

National Aviation University is a university located in Kiev , Ukraine. It started in 1933 when the Kyiv Aviation Institute was founded on the basis of the mechanical department of Kyiv Polytechnic Institute. The University consists of 16 institutes, 2 separate faculties, 1 Aviation Academy , 3 lyceums, 6 colleges and 12 research institutes including their subdivisions and 8 departments. The university has its own center for culture and arts, medical center, library, “Aviator” newspaper and a yacht club. University also supports the State Aviation Museum. Wikipedia.

The research analysis of interaction artificial retaining constructions with a non-uniform soil basis has been performed during the reconstruction of the transport structures. The mathematical model of soil semi-space research with the use of the nonlinear theory of elasticity is developed. The results of numerous researches of stress-strain state fencing constructions of the overpass in interaction with multilayer heterogeneous half-space and surfaces under the influence of band-pass loading are represented in the current paper. © 2012 Vilnius Gediminas Technical University (VGTU) Press Technika. Source

Guo C.H.,Nanyang Technological University | Stabnikov V.,National Aviation University | Ivanov V.,Nanyang Technological University
Bioresource Technology | Year: 2010

Reject water, which is the liquid fraction produced after dewatering of anaerobically digested activated sludge on the municipal wastewater treatment plants (MWWTPs), contributes up to 80% of the nitrogen and phosphorus loads to the MWWTP. It was proposed to combine the removal of nitrogen from reject water using the sequential biooxidation of NH4+ and bioreduction of NO3- with precipitation of phosphate by Fe2+ ions produced due to bioreduction of Fe3+ in iron ore. Bioreduction of NO3- decreased Fe3+ bioreduction rate in reject water from 37 to 21 mg Fe2+/L d due to competition between NO3- and Fe3+ for electron donors. Addition of acetate as electron donor increased both bioreduction rates of Fe3+ and NO3- but acetate interfered with the competition between nitrate and phosphate anions reacting with ferrous cations decreasing efficiency of the phosphate removal from reject water. The stages of denitrification and ferric bioreduction/phosphate precipitation must be performed sequentially. © 2010 Elsevier Ltd. All rights reserved. Source

Voronin A.N.,National Aviation University
Cybernetics and Systems Analysis | Year: 2011

The problem of distribution of a given global resource is considered under constraints imposed from below on partial resources. It is shown that the problem lies in constructing an adequate criterion function for the optimization of the resource distribution process under resource boundedness conditions. The problem is solved by a multicriteria optimization method with the use of a nonlinear trade-off scheme. A model example is given. © 2011 Springer Science+Business Media, Inc. Source

Yanovsky F.J.,National Aviation University
European Microwave Week 2014: "Connecting the Future", EuMW 2014 - Conference Proceedings; EuRAD 2014: 11th European Radar Conference | Year: 2014

Due to the historical and political reasons, a contribution of Ukraine into the world radar development was never enough elucidated so far. This was a great misunderstanding. This paper describes some important contributions to radar that were done in Ukraine during several tens of years. The most attention is done to results of Yakov Davidovich Shirman who passed away recently. © 2014 EuMA. Source

Chemerys V.T.,National Aviation University
Procedia Engineering | Year: 2013

The analysis of railgun's key problems for high velocity macrobody acceleration and new approach to overcoming of these problems are presented in the paper. A threat of rails surface destruction and a crisis of sliding contact are included into the set of main problems of railgun with short discussion of physical phenomena during acceleration. Simple calculations on the electrical model of railgun commutation process under virtual high-speed displacement of armature have displayed the very important conclusions. There is shown in the paper the important role of commutation laws which must be carefully taken into attention especially at high speed velocity of armature. Meanwhile the most known investigations performed both in mathematical simulation and in the experimental tests do not provide the correspondence between conditions of armature motion and commutation laws what leads to the transition of contact metal - metal into the form metal - plasma - metal and into resulting crisis of sliding contact. The new concept to the resolution of limiting problems includes the special conditions to the materials and structure of electrical conductors in the railgun jointly with new variants of geometrical configuration for armature and rails. The new ideas have been illustrated in the paper by the results of mathematical simulation of the pulsed field and current density distribution at high velocity of armature motion (2 km/s and more). The proposed concept can serve for the creation of principally new design of high speed railgun. © 2013 The Authors. Source

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