Zhytomyr State Technological University

Zhytomyr, Ukraine
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Koval A.,Zhytomyr State Technological University | Irigoyen E.,University of the Basque Country
Advances in Intelligent Systems and Computing | Year: 2017

Outdoor air quality monitoring plays crucial role on preventing environment pollution. The idea of use of unmanned aerial vehicles (UAV) in this area is of great interest cause they provide more flexibility than ground systems. The main focus of this work is to propose alternative, competitive outdoor wireless monitoring system that will allow to collect pollution data, detect and locate leakage places within petrol, gas and refinery stations or in hard to reach places. This system should be lightweight, compact, could be mounted on any UAV, operate in GPS denied environments and should be easily deployed and piloted by operator with minimal risk to his health. This paper presents the system, configured on a commercial UAV AR.Drone, embedding gas sensor to it, where as a ground station stands Robot Operation System. Conducted first stage experiments proved capabilities of our system to operate in real-world conditions and serve as a basis to carry out further research. © Springer International Publishing AG 2017.

Tsyporenko V.,Zhytomyr State Technological University
EasternEuropean Journal of Enterprise Technologies | Year: 2017

An analysis of noise immunity of the searchless digital method of correlation-interferometric direction finding with reconstruction of the spatial analytical signal has been carried out. An analytical estimate of the direction finding error variance consisting of the noise and interference components was obtained. It was shown that the main controllable factors affecting the noise component of the direction finding error variance are as follows: the number of direction-finding channels, the amount of separation between the selected elements of the antenna array, the type of the weight function in spatial spectral analysis and the time of emission analysis. The interference component of the direction finding error variance, unlike the noise component, does not depend on the analysis time but is determined, first of all, by the quality of frequencyspatial selection. In simulation, a family of dependencies of the root mean square deviation of the bearing estimate on the signal-tonoise ratio and the type of the weight function of the spectral analysis window was obtained. Possibility of direction finding with a value of the root mean square deviation of the bearing estimate of 0.03 degrees at an input signal-to-noise ratio of 0 dB has been shown. The estimates of the direction finding error variance obtained analytically and by software simulation practically coincided which confirms the analysis correctness. As a result of simulation, a family of dependences of root-mean square deviation of the bearing estimation on the separation of direction to the signal and interference sources at different signal frequencies was also obtained. It was determined that when the 64-element linear array is used, the resolution of the direction finder depends on the signal frequency. It varies between 6-15 degrees in the range of the direction finder operating frequencies at a signal/inter - ference ratio of 0 dB. The resolution of the direction finder which was found to be high compared to the annular antenna array is an important advantage in conditions of a complex electromagnetic situation.

Rosen K.,Swedish University of Agricultural Sciences | Vinichuk M.,Zhytomyr State Technological University
Journal of Environmental Radioactivity | Year: 2016

Contamination levels on potato foliage and tubers were investigated by repeated sampling after multiple foliar contaminations of wet-deposited 134Cs at five different growth stages in a micro-plot field experiment in three successive years. Application of the radionuclide early in the growing season (deposition date 19-27 June, growth stage II = plant establishment) resulted in low 134Cs activity concentration in potato tubers across sampling occasions (mean 60, 25 and 115 Bq kg-1 dry weight (D.W.) for years 1, 2 and 3, respectively). Following radionuclide deposition in the middle of the growing season (15-24 July, growth stage III = tuber initiation), 134Cs activity concentration in tubers across sampling occasions was found to be highest (mean 150, 850 and 660 Bq kg-1 D.W. for years 1, 2 and 3, respectively). When the radionuclide was sprayed on at later stages (5-7 August, growth stage IV = tuber bulking), 134Cs activity concentrations in tubers across sampling dates decreased (mean 75, 310 and 395 Bq kg-1 D.W. for years 1, 2 and 3, respectively). Deposition in the second half of August (15-28 August, late growth stage IV and beginning of growth stage V = tuber maturation) resulted in yet lower 134Cs activity concentration in tubers. Potato tubers may concentrate as much as up to 2 times more 134Cs than foliage depending on deposition date of radionuclide. © 2015 Elsevier Ltd.

Vinichuk M.M.,Swedish University of Agricultural Sciences | Vinichuk M.M.,Zhytomyr State Technological University
Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering | Year: 2013

Ectomycorrhizal fungi profoundly affect forest ecosystems through mediating nutrient uptake and maintaining forest food webs. The accumulation of metals in each transfer step from bulk soil to fungal sporocarps is not well known. The accumulation of three metals copper (Cu), zinc (Zn) and cadmium (Cd) in bulk soil, rhizosphere, soil-root interface, fungal mycelium and sporocarps of mycorrhizal fungi in a Swedish forest were compared. Concentrations of all three metals increased in the order: bulk soil < soil-root interface (or rhizosphere) < fungal mycelium < fungal sporocarps. The uptake of Cu, Zn and Cd during the entire transfer process in natural conditions between soil and sporocarps occurred against a concentration gradient. In fungal mycelium, the concentration of all three metals was about three times higher than in bulk soil, and the concentration in sporocarps was about two times higher than in mycelium. In terms of accumulation, fungi (mycelium and sporocarps) preferred Cd to Zn and Cu. Zinc concentration in sporocarps and to a lesser extent in mycelium depended on the concentration in soil, whereas, the uptake of Cu and Cd by both sporocarps and mycelium did not correlate with metal concentration in soil. Heavy metal accumulation within the fungal mycelium biomass in the top forest soil layer (0-5 cm) might account for ca. 5-9% of the total amount of Cu, 5-11% of Zn, and 16-32% of Cd. As the uptake of zinc and copper by fungi may be balanced, this implied similarities in the uptake mechanism. © 2013 Copyright Taylor and Francis Group, LLC.

Vinichuk M.,Swedish University of Agricultural Sciences | Vinichuk M.,Zhytomyr State Technological University | Martensson A.,Swedish University of Agricultural Sciences | Rosen K.,Swedish University of Agricultural Sciences
Journal of Environmental Radioactivity | Year: 2013

Methods for cleaning up radioactive contaminated soils are urgently needed. In this study we investigated whether the use of arbuscular mycorrhizal (AM) fungi can improve 137Cs uptake by crops. Barley, cucumber, perennial ryegrass, and sunflower were inoculated with AM fungi and grown in low-level radionuclide contaminated soils in a field experiment 70km southwest of Chernobyl, Ukraine, during two successive years (2009-2010). Roots of barley, cucumber and sunflower plants were slightly or moderately infected with AM fungus and root infection frequency was negatively or non-correlated with 137Cs uptake by plants. Roots of ryegrass were moderately infected with AM fungus and infection frequency was moderately correlated with 137Cs uptake by ryegrass. The application of AM fungi to soil in situ did not enhance radionuclide plant uptake or biomass. The responsiveness of host plants and AM fungus combination to 137Cs uptake varied depending on the soil, although mycorrhization of soil in the field was conditional and did not facilitate the uptake of radiocesium. The total amount of 137Cs uptake by plants growing on inoculated soil was equal to amounts in plant cultivated on non-inoculated soil. Thus, the use of AM fungi in situ for bioremediation of soil contaminated with a low concentration of 137Cs could not be recommended. © 2013 Elsevier Ltd.

Sazhin S.S.,University of Brighton | Al Qubeissi M.,University of Brighton | Kolodnytska R.,Zhytomyr State Technological University | Elwardany A.E.,Alexandria University | And 2 more authors.
Fuel | Year: 2014

Biodiesel fuel droplet heating and evaporation is investigated using the previously developed models, taking into account temperature gradient, recirculation, and species diffusion within droplets. The analysis is focused on four types of biodiesel fuels: Palm Methyl Ester, Hemp Methyl Esters, Rapeseed oil Methyl Ester, and Soybean oil Methyl Ester. These fuels contain up to 15 various methyl esters and possibly small amounts of unspecified additives, which are treated as methyl esters with some average characteristics. Calculations are performed using two approaches: (1) taking into account the contribution of all components of biodiesel fuels (up to 16); and (2) assuming that these fuels can be treated as a one component fuel with averaged transport and thermodynamic coefficients. It is pointed out that for all types of biodiesel fuel the predictions of the multi-component and single component models are rather close (the droplet evaporation times predicted by these models differ by less than about 5.5%). This difference is much smaller than observed in the case of Diesel and gasoline fuel droplets, and is related to the fact that in the case of Diesel and gasoline fuel droplets the contribution of components in a wide range of molar masses and enthalpies of evaporation needs to be taken into account, while in the case of biodiesel fuels the main contribution comes from the components in a narrow range of molar masses, boiling temperatures and enthalpies of evaporation. As in the case of Diesel and gasoline fuel droplets, the multi-component model predicts higher droplet surface temperature and longer evaporation times than the single component model. © 2013 Elsevier Ltd. All rights reserved.

Rosen K.,Swedish University of Agricultural Sciences | Vinichuk M.,Swedish University of Agricultural Sciences | Vinichuk M.,Zhytomyr State Technological University
Journal of Environmental Radioactivity | Year: 2014

Fertilization of soils contaminated by radionuclides with potassium (K) and its effect on 137Cs transfer from soil to crops is well studied in field conditions; however experiments over many years are few.The effects of potassium fertilization on cesium-137 (137Cs) transfer to hay, pasture grass, and barley growing on organic rich soils and mineral sand and loam soils in a number of field experimental sites situated in different environments in Sweden are summarized and discussed. The basic experimental treatments were control (no K fertilizers were applied), 50, 100, and 200kgKha-1. In the experiment, which lasted over 3-6 years, 137Cs transfer factors in control treatments ranged between 0.0004m2kg-1 (barley grain on sand soil) and 0.07m2kg-1 (pasture grass on organic rich soil). Potassium application on soils with low clay content i.e. mineral sand and organic rich soils was effective at the 50-100kgha-1 level. Application of 200kgKha-1 resulted in a five-fold reduction in 137Cs transfer for hay and up to four-fold for barley grain. The effects of potassium application were generally greater on sand than organic rich soil and were observed already in the first cut. After K application, the reduction in 137Cs transfer to crops was correlated with 137Cs:K ratios in plant material. Additional application of zeolite caused a 1.4 reduction of 137Cs transfer to hay on sand and 1.8-fold reduction on organic rich soil; whereas, application of potash-magnesia and CaO had no effect. © 2013 Elsevier Ltd.

Vinichuk M.,Swedish University of Agricultural Sciences | Vinichuk M.,Zhytomyr State Technological University | Martensson A.,Swedish University of Agricultural Sciences | Ericsson T.,Swedish University of Agricultural Sciences | Rosen K.,Swedish University of Agricultural Sciences
Journal of Environmental Radioactivity | Year: 2013

The potential use of mycorrhiza as a bioremediation agent for soils contaminated by radiocesium was evaluated in a greenhouse experiment. The uptake of 137Cs by cucumber, perennial ryegrass, and sunflower after inoculation with a commercial arbuscular mycorrhizal (AM) product in soils contaminated with 137Cs was investigated, with non-mycorrhizal quinoa included as a "reference" plant. The effect of cucumber and ryegrass inoculation with AM fungi on 137Cs uptake was inconsistent. The effect of AM fungi was most pronounced in sunflower: both plant biomass and 137Cs uptake increased on loamy sand and loamy soils. The total 137Cs activity accumulated within AM host sunflower on loamy sand and loamy soils was 2.4 and 3.2-fold higher than in non-inoculated plants. Although the enhanced uptake of 137Cs by quinoa plants on loamy soil inoculated by the AM fungi was observed, the infection of the fungi to the plants was not confirmed. © 2012 Elsevier Ltd.

Zamula I.V.,Zhytomyr State Technological University
Actual Problems of Economics | Year: 2016

Preconditions which require a transition to the production of eco-friendly products as well as the problems arising from marketing promotion of such products are studied in the article. Factors of the first and of the second order measured for better profitability management of eco-friendly products are outlined. The sequence in determination of the synergy effect from interaction of these factors is suggested. The author’s recommendations are aimed at provision of conditions for social and food security of the society and are one of the ways for implementation of the sustainable development concept. © 2016, National Academy of Management. All rights reserved.

Iziumova O.H.,Zhytomyr State Technological University
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu | Year: 2016

Purpose: To study the physical processes of formation of physical and water-physical properties of sod-podzolic soil in the areas reclaimed after mining developments for practical measures on full implementation of the ecosystem functions of soil under technogenesis conditions. Methodology: The methodological basis of research was the concept of environmental monitoring. Conventional methods in ecology, field and laboratory ones, were used for the research. In the field studies, the methods of comparative analogy with regional control were used. The laboratory tests were conducted in accordance with generally accepted in soil science certified and standardized methods. Findings: Under natural soil conditions, a 30-year period after the remediation is insufficient to restore the evolutionary balanced parameters of physical structure of the soil. The residual effects of its physical abuse appear to change the density compilation porosity and, consequently, the quantitative characteristics of water-physical constants and forms of soil moisture reserves. Originality: For the areas reclaimed after opencast mines, the time and quantitative parameters of forming the physical structure and water-physical constants of disturbed soil by natural soil conditions were first established. The possible scenarios for forming stocks of productive moisture in the plow layer of soil were shown. Practical value: The regularities of forming agrophysical soil properties can be used by mining companies to justify the technical specifications of the restoration of land after opencast mines and by farms to develop measures aimed at regulating elements of disturbed soil fertility and improvement of technological schemes of growing crops on the reclaimed areas. © Iziumova O.H., 2016.

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