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Sergeychuk O.,Kiev National University of Construction and Architecture | Radomtsev D.,Kiev National University of Construction and Architecture
International Journal of Smart Home | Year: 2016

New standard CIE S 011/E:2003 "CIE standard general sky" was accepted in Ukraine in 2010. With its adoption the question of its appropriate usage with national documents became an important event. Feasible way of standard's utilization with Ukrainian daylighting standards and effects of its implementation are given in the paper. © 2016 SERSC.


Heuss-Assbichler S.,Ludwig Maximilians University of Munich | John M.,Ludwig Maximilians University of Munich | Klapper D.,Ludwig Maximilians University of Munich | Blass U.W.,Friedrich - Schiller University of Jena | Kochetov G.,Kiev National University of Construction and Architecture
Journal of Environmental Management | Year: 2016

Recently the focus of interest changed from merely purification of the waste water to recover heavy metals. With the slightly modified ferritization process presented here it is possible to decrease initial Cu2+ concentrations up to 10 g/l to values <0.3 mg/l. The recovery rates of copper of all experiments are in the rage of 99.98 to almost 100%. Copper can be precipitated as oxide or zero valent metal (almost) free of hydroxide. All precipitates are exclusively of nanoparticle size. The phase assemblage depends strongly on experimental conditions as e.g. reaction temperature, pH-value, initial concentration and ageing time and condition. Three different options were developed depending on the reaction conditions. Option 1.) copper incorporation into the ferrite structure ((Cu,Fe)Fe2O4) and/or precipitation as cuprite (Cu2O) and zero-valent copper, option 2.) copper incorporation into the ferrite structure and/or precipitation as cuprite and/or tenorite (CuO) and option 3.) copper precipitation as tenorite. Ferrite is formed by the oxidation of GR in alkaline solution without additional oxygen supply. The chemistry reaches from pure magnetite up to 45% copper ferrite component. First experiments with wastewater from electroplating industry confirm the results obtained from synthetic solutions. In all cases the volume of the precipitates is extremely low compared to typical wastewater treatment by hydroxide precipitation. Therefore, pollution and further dissipation of copper can be avoided using this simple and economic process. © 2016 Elsevier Ltd.


Radomtsev D.,Kiev National University of Construction and Architecture | Sergeychuk O.,Kiev National University of Construction and Architecture
Proceedings - 9th International Conference on Future Generation Communication and Networking, FGCN 2015 | Year: 2015

With the acceptance of new standard CIE S 011/E:2003 "CIE standard general sky" in Ukraine the question of it's adoption to the national documents became an important event. Feasible way of implementation standard into Ukrainian daylighting calculations standards and methods of designing systems of room daylight is giving in the paper. © 2015 IEEE.


On the basis of a semi-analytical finite element method, an effective approach has been developed for studying transient processes of dynamic deformation of three-dimensional heterogeneous bodies of revolution and prismatic bodies of complex shape and structure by the action of time-and space-varying pulsed stressing with allowance for the plastic properties of the material and time-varying contact interaction conditions. New types of finite elements have been created, on the basis of which computational relationships of the semi-analytical finite element method (SAFEM) for problems of dynamics have been constructed. Modified relationships of the Newmark method have been obtained, which have been formulated for the amplitude subsystems of SAFEM. Effective block iteration algorithms for the solution of large systems of nonlinear equations of SAFEM have been developed and realized. © 2013 Springer Science+Business Media New York.


Bazhenov V.A.,Kiev National University of Construction and Architecture | Pogorelova O.S.,Kiev National University of Construction and Architecture | Postnikova T.G.,Kiev National University of Construction and Architecture
Strength of Materials | Year: 2011

The relationship between the dynamic behavior of the nonlinear impact-vibratory system and variation of some parameters: damping factor, elastic modulus, surface of one of the colliding bodies, is analyzed. The double-impact subharmonic vibration mode of the system was revealed. © 2011 Springer Science+Business Media, Inc.

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