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Drobakhin O.O.,Oles Honchar Dnepropetrovsk National University
2015 International Conference on Antenna Theory and Techniques: Dedicated to 95 Year Jubilee of Prof. Yakov S. Shifrin, ICATT 2015 - Proceedings | Year: 2015

For six-port vector analyzer based on the E-plane waveguide cross-connection of rectangular waveguides, the benefits of determining the values of the complex reflection coefficient with the application of the principles of holography with three reference signals were approved. The value of the condition number of the matrix system of linear algebraic equations formed according to the methods processing considered was used as a criterion for the selection of the waveguides connection angle. It is shown that the allowable angle is 60 degrees. © 2015 IEEE. Source


Gorbonos S.A.,Oles Honchar Dnepropetrovsk National University
Journal of Automation and Information Sciences | Year: 2014

The optimal control problem for a parabolic system with unbounded coefficients is considered. An approach that allows one to get solution of the posed control problem through a series of solutions of optimal control problems, which are defined on perforated subsets with fictitious boundary controls, is proposed. © 2014 by Begell House Inc. Source


Vytovtov K.A.,Oles Honchar Dnepropetrovsk National University
Proceedings - 2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves, MSMW 2013 | Year: 2013

an ordinary isotropic stratified structure is offered for frequency detector of terahertz range. It is considered two cases: in-phase and opposite phase frequency detector. © 2013 IEEE. Source


Pal'Chikov V.A.,Oles Honchar Dnepropetrovsk National University
Russian Journal of Organic Chemistry | Year: 2015

Reactions of 2-amino-1-(4-nitrophenyl)ethanol with various electrophilic reagents led to the formation of oxazaheterocycles (1,3-oxazolidin-2-one, 1,3-oxazolidine, morpholin-2-, -3-one, and -2,3-dione). In reactions of 2-{(bicyclo[2.2.1]hept-5-en-2-ylmethyl)amino}-1-(4-nitrophenyl)ethan-1-ol with carbonyldiimidazole, oxalyl chloride, benzaldehyde, and formaldehyde the corresponding derivatives of 1,3-oxazolidin-2- one, morpholin-2,3-dione, and 1,3-oxazolidine were obtained. © 2015 Pleiades Publishing, Ltd. Source


Son M.O.,Ukrainian Academy of Sciences | Novitsky R.A.,Oles Honchar Dnepropetrovsk National University | Dyadichko V.G.,Ukrainian Academy of Sciences
Vestnik Zoologii | Year: 2013

Lower reaches of largest Ukrainian rivers are zones of migrations for exotic euryhaline decapods. During 2000s new records of invasions of three euryhaline exotic decapods, Rhithropanopeus harrisii (Gould, 1841), Eriocheir sinensis Milne-Edwards, 1853 and Macrobrachium nipponense (De Haan, 1849), were made in the channels of Ukrainian rivers. Chinese mitten crab, E. sinensis, spread in the Danube Delta and reservoirs of the Dnieper River; Rh. harrisii - in the channels of the Danube, Dnieper, Southern Bug and small river Gruzskij Yelanchik in the Azov Sea Basin; M. nipponense that was introduced in the Kuchurgan Liman (cooler reservoir of the Moldavian Hydro-power Station) - in the Dniester Delta. The migration zone of the established population can cover significant part of river watershed; it is necessary to take this fact into account at an estimation of biological invasion risk. Main problem in the investigation of exotic decapods in Ukrainian waters is absence of specialized methods used in the standard ecological monitoring. Among euryhaline exotic decapods, only Rh. harrisii is sometimes sampled with the equipment used in the monitoring of macrozoobenthos. A few records of these species at the large extent of their supposed ways of migration are the result of gaps in the study of their distribution in Ukrainian inland waters. Realistic attitude toward this fact is very important for the estimation of invasions in the inland waters of this region. Source

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