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1
Content available Study on the Influence of Selected Technological Parameters of a Rotating Biological Contactor on the Degree of Liquid Aeration
Szulżyk-Cieplak J., Tarnogórska A., Lenik Z.
Journal of Ecological Engineering
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2018
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Vol. 19, nr 6
247--253
EN
The subject of the research involves a rotating biological contractor with a bi-directional longitudinal flow as an element of a synchronized system of disposal and biological treatment of domestic wastewater in small-bore sewerage. The rotor design is based on a system of corrugated protective pipes, arranged in coils wound around its rotation axis. The pipes are wound in a way that enables a bi-directional flow of liquids. During the rotor rotation in wastewater, the contactor is simultaneously emptied and filled with wastewater. The role of corrugated protective pipes is twofold; on the one hand, they constitute a surface for the biofilm development and on the other, they enable the flow of liquids, thus ensuring its aeration. The contactor design aims to achieve intensive aeration of transported wastewater, which will allow for greater development of microorganism populations participating in hybrid wastewater treatment, i.e. the methods involving activated sludge and trickling filter. An analysis on the influence of rotor operation kinematics on the efficiency of liquid aeration was conducted. The aeration capacity for variable rotational speed (0.7 rpm, 1.5 rpm, 2.0 rpm, 3.0 rpm) and direction of the contactor rotating element were calculated. In the considered case, oxygen transfer coefficient KLa was within the range of 0.011÷0.023 1/min. The obtained results indicate a clear connection between the system kinematics and the degree of liquid aeration in the contactor.
2
Content available The base of the methodical design and implementation of engineering education process
Lis R., Lenik Z.
Advances in Science and Technology. Research Journal
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2012
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Vol. 6, nr 16
55--59
EN
The article is devoted to the methodology of implementation of European and national qualifications framework in the academic process. It consists of: the methodic of design degree programs and classes and the methodic of the teaching process.
3
Content available Zastosowanie multimedialnych środków dydaktycznych w procesie nauczania
Lenik Z.
Postępy Nauki i Techniki
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2011
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nr 11
156-163
PL
W artykule omówiono problematykę stosowania multimedialnych środków dydaktycznych w procesie nauczania. Zwrócono uwagę zarówno na pozytywne aspekty takich działań, jak i na możliwe negatywne wpływy.
EN
The article discusses issues in the teaching of multimedia teaching aids. Attention waspaid not only on the positive aspects of such activities, but also on the possible negative influences.
4
Content available Wykorzystanie arkusza organizacyjnego z pakietu Vulcan w organizacji pracy szkoły
Lenik Z.
Postępy Nauki i Techniki
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2010
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nr 4
23-32
PL
W artykule omówiono i podano przykłady możliwości wykorzystania arkusza organizacyjnego z pakietu Vulcan do opracowania organizacji procesu dydaktycznego z zakresu projektowania zajęć dydaktycznych.
EN
In this article it was discussed and given examples of possibilities using of the Organizing Sheet from Vulcan package to develop the teaching process organization from the design of classes.
5
Content available remote Forecasting of durability of waterborne coatings in the machine industry
Lenik K., Gauda K., Lenik Z.
Archives of Materials Science and Engineering
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2009
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Vol. 37, nr 2
102-109
EN
Purpose: The paper presents the problems of forecasting of durability of waterborne acrylic coatings and epoxy coatings designed to protect devices and machine elements. Design/methodology/approach: The durability forecast has been performed on the basis of analyses of time series with the use of trend function extrapolation. Mechanical properties such as: scratch resistance, impact strength, grindability and luster have also been evaluated. Moreover, besides standardized methods, some complementary methods have been applied in the form of analyses of microscopic images of damage caused by the exposition of coatings to corrosion. Findings: Assuming five-year durability for coatings on devices and machine elements (time between overhauls), one can find that investigated waterborne coatings can be a successful protection of devices and machine elements in the established range and in the dependence on the applied system. Research limitations/implications: The research has shown some substantial influence of coating system width changes on obtained results of scratch resistance and impact strength. It should be beneficial to extend further research with the description of the mechanism that enables to obtain some strict correlation between the investigated properties of coatings and the allowance of their width. Practical implications: The research makes possible to determine the areas of application for coatings obtained from waterborne materials to anticorrosion protection of devices and machine elements. This enables to eliminate gradually traditional solvent coatings (of high VOC content), which are disadvantageous to the environment. Originality/value: The applied sequence of research can form a proposal of the method to evaluate coatings made of some other than investigated waterborne materials predestinated for machine industry.
6
Content available Wykorzystanie multimediów strumieniowych w kształceniu technicznym i informatycznym
Gauda K., Lenik Z.
Postępy Nauki i Techniki
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2008
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nr 2
127-139
PL
Referat porusza problemy zastosowania multimediów w edukacji, szczególnie w kształceniu technicznym i informatycznym. W dalszej części przedstawiona została coraz częściej wykorzystywana w Internecie technologia strumieniowania plików oraz przeanalizowane zostały możliwości jej wykorzystania. Na zakończenie opisane są poszczególne fazy dotyczące przygotowania i publikacji własnych materiałów dydaktycznych w formie strumieniowej.
EN
The paper discusses problems of use of multimedia in education, particularly in technical and computer education. Moreover, the streaming technology is presented as well as the possibilities of use of the technology is analysed. Finally, the respective phases of preparation and publication of own didactic materials in stream mould are described.
7
Content available Wykorzystanie baz danych w działalności admininstracji szkolnej
Lenik Z., Gauda K.
Postępy Nauki i Techniki
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2007
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nr 1
129-137
PL
W artykule omówiono możliwości wprowadzania do administracji szkolnej oprogramowania komputerowego wspomagającego jej pracę. Problem dotyczy wykorzystania dla administracji szkolnej programów z pakietu Office (Word, Excel i Access). Jako przykład realizacji podjętego zadania opisano projekt elementu bazy danych dla potrzeb sekretariatu szkolnego pod nazwą Informacje o pracownikach szkół.
EN
In this article it was discussed the possibilities of introductions of the software aiding the work of school's administration. The problem respects use of programs from Office packet (Word, Excel and Access) for administration of school. It was described project of element of database for school's secretariat need called: School's worker information as the example of taking problems.
8
Content available remote Calculation of phase equilibrium in Fe-B-C-O system
Lenik K., Pashechko M., Kondyr A., Bohun L., Lenik Z.
Archives of Materials Science and Engineering
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2007
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Vol. 28, nr 8
483-488
EN
Purpose: This paper presents calculation of phase equilibrium in Fe-B-C-O system. Design/methodology/approach: The typical phase equilibrium diagrams do not always provide useful information on this problem, especially for polycomponent systems. Instead of this, the methods for phase equilibrium calculations, the necessary data about thermodynamic properties of agents being available, can simplify greatly the problem of prediction of the composition of the oxide layer and accelerate its solution. Findings: In order to predict the phase composition of the boron-carbon surface layers during surfacing as well as of the secondary structures under wear, the calculations of the phase equilibrium in Fe-B-C-O system at 723, 843 and 1644 K have been carried out. Research limitations/implications: The phase equilibrium calculations in the friction couples, containing boron and carbon agree well with the results of investigations of the chemical and phase composition of the secondary structures of wear, formed during friction of boron and carbon-containing composites. Originality/value: The carbon concentration increases on the contact surface. This is caused, in our opinion, by the graphite film formation due to carbon monoxide stability. The boron content in the composition of wear products increases as a result of melting and formation of the oxide layer on the friction surface.
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