FORECASTING AUTOMOTIVE WASTE GENERATION
USING SHORT DATA SETS: CASE STUDY OF LITHUANIA

Aistė Karpušenkaitė1, Tomas Ruzgas2, Gintaras Denafas1

1Department of Environmental Technology, Kaunas University of Technology,
19, Radvilėnų pl., Kaunas, Lithuania, medianaa@gmail.com
2the Faculty of Mathematics and Natural Science, Kaunas University of Technology,
50, Studentų g., Kaunas, Lithuania

Received: 19.10.2016

© Karpušenkaitė A., Ruzgas T., Denafas G., 2016

Abstract. There were 1.83 million cars and average passenger car age was 18 years in Lithuania in 2013. Increasing number of cars has an insignificant effect on car age change but it is contrary to automotive waste, both hazardous and non-hazardous, that accumulates during vehicle exploitation and after it ends. The aim of this study was to assess different mathematical modelling methods abilities to forecast non-hazardous and hazardous automotive waste generation. Artificial neural networks, multiple linear regression, partial least squares, support vector machines, nonparametric regression and time series methods were used in this research. Results revealed that nearly perfect theoretical results in both cases can be reached by smoothing splines and other nonparametric regression methods. It is very doubtful that results would be so precise using data outside of currently used data set range and due to this reason further testing using 2014–2015 data is needed.

Key words: automotive waste, hazardous, car, smoothing splines, nonparametric regression.

Кількість посилань 20

WASTEWATER TREATMENT
BY ULTRAVIOLET IRRADIATION TECHNIQUE

Nataliya Vronska1, Myroslav Malyovanyy1, Olena Popovych1, Oleh Stokalyuk2

1Lviv Polytechnic National University, Lviv, Ukraine
2Lviv State University of Life Safety

Received: 05.05.2017

© Vronska N., Malyovanyy M., Popovych O., Stokalyuk O., 2017

Abstract. Devoted to the problem of sewage treatment by ultraviolet radiation. This method can clear the water from microbiological contamination and thereby improve water quality.

Key words: ultraviolet, microorganisms, wastewater treatment.

Кількість посилань 5

THE PROTECTION OF WOODEN CONSTRUCTING
MATERIALS AND STRUCTURAL ELEMENTS
OF BUILDINGS AGAINST BIOLOGICAL DAMAGE

Tetyana Kryvomaz1, Alona Perebynos2

1Associate professor of the Department of labour safety and the environment protection
2Postgraduste student
Kyiv National Construction and Architecture University
31, Povitroflotskyi prospect, Kyiv, 03680, Ukraine

Received: 21.09.2016

© Kryvomaz Т., Perebynos A., 2016

Abstract. The methods of wooden building materials protection from biological damage were analysed. Constant technical monitoring is the main preventive measure against damage of structural elements of the wooden buildings. The most effective methods from biological damage are chemical treatment, capillary infiltration, diffusion treatment and impregnation under pressure. The essence of action against mycodestructors is to create conditions for the preservation of wood buildings by removing danger factors: moisture more than 20 %, condensation phenomena, sharp fluctuations in temperature, freezing, stagnant air, etс. Effective preventive bioprotection methods are based on the ability of organisms to inhibition or complete growth termination of some species in the presence of the others. It was also found that for the preservation of historical-architectural buildings it is appropriate to apply diffusion method using boron compounds that are able to penetrate into the depth of the construction, while providing maximum protection with minimum interference into materials.

Key words: wood, building materials, historical and architectural building, protection, biological damage, mycological damage.

Кількість посилань 13

THE KEY ASPECTS OF ATMOSPHERIC
AIR ECOLOGICAL MONITORING CONCEPT FORMATION
AT THE URBAN SYSTEMS LEVEL

Volodymyr Bakharev, Andriy Marenych

Kremenchuk Mykhailo Ostrohradsky National University
20, Pershotravneva str., Kremenchuk, 39600, Ukraine.
E-mail: v.s.baharev@yandex.ua, andrey_avgust@ukr.net

Received: 08.12.2016

© Bakharev V., Marenych A., 2016

Abstract. The key aspects of atmospheric air ecological monitoring concept formation on the urban system have been analyzed. The principal scheme of concept construction has been proposed. It has been defined that the concept has to be built on the anthropocentric approach. The samples of atmospheric air ecological monitoring unsolved issues on the urban system of the town of Kremenchuk (Ukraine) have been taken to concretize the integral parts of the concept with defining goals, objectives, statistic results and dynamic indicators of the concept implementation.

Key words: concept, ecological monitoring, atmospheric air, urban system, monitoring system.

Кількість посилань 10

LINEAR STABILITY ANALYSIS FOR THE THERMOTACTIC MICROORGANISMS IN POROUS MEDIA

Zineddine Alloui1, Tri Nguyen-Quang2*

1 Département du Socle commun des Sciences et Technique, Faculté de Technologie,
Université El-Hadj-Lakhdar Batna, Algérie
2 Engineering Department, Faculty of Agriculture, Dalhousie University, Canada
*Corresponding author: tri.nguyen-quang@dal.ca

Received: 02.03.2017

© Alloui Z., Nguyen-Quang T., 2017

Abstract. Thermotaxis or motion in the field of temperature gradient is a very common phenomenon and can be found in many events in nature, from biological ones to the migration of colloidal particles. In this paper, we suggest a deterministic model to describe the collective behavior of a microorganism population with a general form of stimuli gradient-based taxis in porous media. This population has the mass density slightly heavier than the water density and forms a suspension. The suspended cells are actively in motion with a thermotaxis behavior (temperature gradient follower). Based on an Eulerian framework, the model comprises basically the Darcy equation for the fluid motion in porous media, equation of cell conservation for the microorganism population and equation of conservation for the considered stimuli. To take into account the density effects, the Boussinesq’s approximation will be used. Linear stability analysis shows that there are interesting effects of temperature on the bioconvection pattern of the thermotactic microorganisms.

Key words: Thermotaxis, gradient-based motion, linear stabiliy, thermotactic bioconvection.

1Кількість посилань 19