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Rogankov V.B.,Odessa National Academy of Food Technologies
Journal of Thermodynamics | Year: 2015

The universal scaling concept is applied to the low-temperature range of any liquid states and substances located between the melting (Tm) and normal boiling (Tb) points far away from the critical region. The physical reason to develop such approach is the revealed collapse of all low-temperature isotherms onto the single universal one argued by the model of fluctuational thermodynamics (FT) proposed recently by author. The pressure reduced by the molecular parameters of the effective short-range Lennard-Jones (LJ) potential depends here only on the reduced density. To demonstrate the extraordinary predictive abilities of the developed low-temperature scaling model it has been applied to the prediction of equilibrium and transport (kinetic and dynamic viscosity, self-diffusion, and thermal conductivity) properties not only for molecular liquids but also for molten organic salts termed ionic liquids (ILs). The best argument in favor of the proposed methodology is the appropriate consistency with the scarce experiments prediction of transport coefficients for ILs on the base of universal scaling function constructed for the simplest LJ-like liquid argon. The only input data of any substance for prediction are the linear approximations of T-dependent density and isobaric heat capacity taken from the standard measurements at atmospheric pressure. © 2015 Vitaly B. Rogankov. Source


Kalchenko A.,Odessa National Academy of Food Technologies
Modern Problems of Radio Engineering, Telecommunications and Computer Science, Proceedings of the 13th International Conference on TCSET 2016 | Year: 2016

This paper presents a method for controlling Quality of Services (QoS) in Next Generation Networks (NGN), which allows us to effectively monitor and maintain the level of users' satisfaction with the quality of services at the required level. The method is based on the use of methods of fuzzy logic and neural networks. The possibility of applying the method for networks with distributed control system is shown. © 2016 National University Lviv Polytechnic. Source


Yakub L.N.,Odessa National Academy of Food Technologies
Low Temperature Physics | Year: 2016

The results of experimental and theoretical studies of the thermodynamic properties of new polymeric phases of nitrogen at ultra-high pressures, as well as computer modeling of the structure and properties of polymeric nitrogen based on the potential models of interaction of atoms and molecules are reviewed. The location of the phase transition lines for the transitions between the molecular and polymeric crystals, molecular and polymeric fluids as well as the position of the melting line for the polymeric nitrogen in the phase diagram are discussed. © 2016 AIP Publishing LLC. Source


Yakub L.N.,Odessa National Academy of Food Technologies
Low Temperature Physics | Year: 2015

The results of theoretical prediction of the phase transition lines of molecular nitrogen into the polymeric phase at high pressure are presented. The role of the polymeric phase structure in the location of the transition lines on the phase diagram is considered. Possible configuration of the melting curve of the polymeric nitrogen solid forming the polymeric liquid is discussed. Predicted volumes of the coexisting phases are compared with experimental data and with results of the computer simulations. © 2015 AIP Publishing LLC. Source


Seggern H.,TU Darmstadt | Zhukov S.,TU Darmstadt | Fedosov S.,Odessa National Academy of Food Technologies
IEEE Transactions on Dielectrics and Electrical Insulation | Year: 2011

Electrical and mechanical properties of corona poled three layer FEP/ePTFE/FEP sandwiches were studied theoretically and experimentally. Modeling of the properties has been performed, as well as their experimental verification. The piezoelectric d33 coefficient has been studied with the objective of its possible optimization. It has been shown that the maximum value of the d33 piezocoefficient depends on interrelation between solid and porous layers thicknesses, the intrinsic Young modulus of the porous layer and dependence of the breakdown field on the thickness of the porous layer. The best geometry of the sample can be designed considering the obtained results. © 2011 IEEE. Source

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