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Kremenchuk, Ukraine

Pidlisnyuk V.,Matej Bel University | Pidlisnyuk V.,Kremenchuk National University | Stefanovska T.,University of Life Science and the Environment | Lewis E.E.,University of California at Davis | And 2 more authors.
Critical Reviews in Plant Sciences | Year: 2014

There are many locations where soil quality improvements would be beneficial because of contamination, erosion, flooding, or past human activities. Miscanthus, a C-4 grass related to sugarcane, grows well in mildly contaminated soil and on sites where soil quality is poor, particularly with respect to nitrogen. Because of its high biomass yield, it is of interest as an energy crop, and as a plant to use for simultaneous crop production and phytoremediation. Here we review recent literature on using miscanthus for combined biomass production and phytoremediation of contaminated and marginal lands. We analyze both advantages and disadvantages for production of this crop along with phytoremediation of sites contaminated with metals and petroleum hydrocarbon. Reports of laboratory and field investigations, which use Miscanthus spp. for stabilizing and removing metals are considered. The potential for growing miscanthus commercially at contaminated and marginal sites in the regions of Central and Eastern Europe as well as the United States appears to be good because large quantities of biomass can be produced and effective phyto-stabilization can be achieved with very slow metal removal over time. In addition, soil quality is improved in many cases. © 2014 Copyright Taylor and Francis Group, LLC.

Slavko O.,Kremenchuk National University
Proceedings of the 2013 IEEE 7th International Conference on Intelligent Data Acquisition and Advanced Computing Systems, IDAACS 2013 | Year: 2013

Problem of Quality of Service (QoS) providing in computer networks in case of uncertainty of data transferring processes is examined. Method of random early detection (RED) for congestion avoidance in networks is analyzed. Modification of adaptive RED (ARED) is offered. This modification consists in adjusting parameter, that are used during determination of average queue length in router's buffer, on a base of queue stability condition and dynamic adjustment of maximum probability of packets drop in case of congestions. Reducing of networks parameters amount, that are used for adjusting of active queue management algorithms, on a base of their ranking towards availability and importance, is offered. © 2013 IEEE.

Korenkova T.V.,Kremenchuk National University
Technical Electrodynamics | Year: 2014

Methodological approach to formation of electric hydraulic complexes power models in the form of balance equations of harmonic components of power function is offered. It is found out that the use of indices based on determination of effective powers of both separate elements and the system on the whole for estimation of the capacity of the power channel, power controllability of electric hydraulic complexes is justified.

Lutsenko I.,Kremenchuk National University
Metallurgical and Mining Industry | Year: 2015

An approach to the synthesis of simple systems is suggested. The concepts of "basic operation", "basic mechanism" and "dual system" are introduced. It is found that the classification criterion of the number of the basic system operations is the number of its control subsystems. The definition of the "dual system" concept is given. The concepts of "simple system", "control system", "complicated system", "large system" are clarified. A refined classification of systems and system entities is suggested.

Zagirnyak M.,Kremenchuk National University
Technical Electrodynamics | Year: 2013

To develop control circuits for direct current electromagnets (magnetic separators, lifting electromagnets, actuators) it is necessary to calculate their windings inductances. Estimation of inductance requires determination of winding flux linkage. In the present paper the mentioned problem is solved analytically referring to U-shaped electromagnet with a rectangular window space where two energized coils are located. In this case the assigned problem is to determine the inter-coil gap influence on the value of vector potential and, correspondingly, the scattered-flux linkage (inductance). As a result, distribution of vector magnetic potential has been determined for U-shaped electromagnet window space by Rogovskii's method. An analytical expression for winding scattered-flux linkage (two coils) and its inductance has been obtained. Curves determining winding scatter specific inductance are shown for the considered electromagnet. An inductance component conditioned by the gap between two coils has been singled out and presented by an algebraic expression. Calculations of the given scatter inductances in electric systems of industrial suspended guard magnets proved the necessity for taking inter-coil gap into consideration.

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