Wyniki wyszukiwania - BazTech

1

Simulation studies MES impact on terrain roughness friction in plastic deformation process steel

Korga S., Duda A., Gnapowski S., Lenik K.

Archives of Materials Science and Engineering

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2015

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Vol. 72, nr 1

26--32

EN

Purpose: The article aims is discuss the impact the state of the 3D model geometry processes sliding friction FEM simulation. Design/methodology/approach: Modeling and analysis of sliding friction tribological phenomena in the program Deform 3D. Findings: The paper presents a comparison of the results of tests carried out in real and virtual. It describes the common features and differing accepted research methods. Research limitations/implications: The research of sample upsetting in movement conditions enables to determinate the effectiveness of accepted research methods. Practical implications: Finite element method can be used as an effective tool for the study of phenomena forming when considering different operating conditions of individual elements provided the appropriate tools for FEA. Originality/value: The use of sliding friction apparatus and FEM for plastic deformation processes in research.

2

Inproving of the quality food for animals by pulsed power plasma discharge

Gnapowski S., Gnapowski E., Duda A.

Advances in Science and Technology. Research Journal

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2015

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Vol. 9, nr 27

58--65

EN

Soy beans powder mixed with water is a good food for animals. However, there are two problems with this brew. One is that soy beans powder is sunk down to fast. Parts of soy beans powder are too big and too heavy. Animals do not eat soy beans powder because after a few minutes (around 3min) is sunk down and soy beans are on the bottom case. Another negative point is a quick growth of mold, especially during summer when the temperature is highest. Mold is making food unhealthy and causes unpleasant smell. After mold appears it is difficult to clean the case. One of the solutions to eliminate these problems is to use pulse power plasma discharge and the second solution is ultra sound treatment. It was observed that pulse power discharge can decrease the size of soy beans powder a few times. Another advantage of such experiments was that the pulse power discharge killed bacteria and viruses. After our experiments we did not observe mold growing. Using pulse power discharge we can decrease sinking speed by about ten times. Ultra sound generation is useful and can decrease sinking speed even more, compared with pulse power discharge.

3

The role of e-learning in educational processes

Duda A., Korga S., Gnapowski S.

Advances in Science and Technology. Research Journal

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2014

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Vol. 8, nr 24

61--65

EN

The subject of this article contains selected methods of optimization of educational work using selected computer tools, such as e-learning. The use of information technologies is a common feature of teaching methods, which include e-learning. Through a distance learning, teaching and learning process became accessible from anywhere, at any age and time. Virtual contact between the teacher and the student is in many cases far more convenient for both of them. Training and e-learning courses are very popular. They are carried out not only in school or academic environment but also in the business one. Distance education is used as a tool to support learning process, and its use may allow easy management of materials, allowing to create flexible educational methods.

4

Change of aluminum alloys structure by sono-solidification

Gnapowski S., Tsunekawa Y., Okumiya M., Lenik K.

Archives of Foundry Engineering

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2013

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Vol. 13, iss. 4

39--42

EN

This experiment utilized five Aluminum alloys with silicon content percentages of 7, 10, 12.6, 14.5 and 17(wt)%. Ultrasonic vibration was applied to improved the quality of aluminum alloys. Sono-solidification, in which ultrasound vibrations are applied to molten metal during its solidification, is expected to cause improved mechanical properties due to grain refinement. Observed by microstructure photographs was that grains became smaller and their shapes more regular. Using ultra sound solidification α Al appeared during ultrasound treatment the eutectic solidification time was longest around 10% compared with same condition experiment without ultrasound treatment.

5

New possibility for the use of plasma discharges to identify amber and changes in amber structure

Gnapowski S., Lenik K., Szwed G., Akiyama H.

Advances in Science and Technology. Research Journal

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2012

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Vol. 6, nr 16

1--6

EN

Pulsed power discharge applied in air to the amber surface was found to cause improvement in its appearance and color changes such as to red, a color not natural to amber but attractive for jewelry. Needle and plate electrodes were used during experiments. Pulsed power discharges in air particularly turned amber red at the edges and around the needle electrode. Discharges in water did not change amber structure because discharge occurring on the surface does not cross the amber structure. Discharges in silicone oil had a different effect, with most discharge passing through the amber structure, causing fine cracks. Unfortunately, the absence of a consistent amber structure causes difficulty in selecting the correct discharge (shock wave) power. Using new technology, we have changed the appearance a very old material-amber (about 40 – 60 million years old) – to make it more attractive for customers; this technology is also useful for detecting artificial amber (costume jewellery) without causing damage to the product.

6

Improving the ozone generation using ozonizer with the rotating type electrode

Gnapowski S., Yamabe C., Ozonek J.

Przegląd Elektrotechniczny

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2009

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R. 85, nr 5

109-112

EN

An ozonizer using a rotating electrode was used to improve the ozone production characteristics. The ozone concentration increased up to maximum about two times lager compared with the case of no rotation. The input power increased with the rotating speed and discharge area grew up too. The reasons came from the increase of discharge length of canals during the rotation of electrode. During the experiments three types rotation electrode: different material (i.e. brass, copper and coaled gold) was used.

PL

Zastosowanie elektrody obrotowej zwiększyło wydajność procesu generacji ozonu. Koncentracja ozonu wzrosła dwukrotnie w porównaniu z elektrodą nie obrotową. Zaobserwowano zwiększenie mocy wejściowa przy takich samych parametrach eksperymentu, strefa wyładowań stała się jednorodna i bardziej intensywna. Kanały wyładowcze zmieniły swoją długość, wydłużając się o około 10 % podczas rotacji. W eksperymencie użyto elektrod wykonanych z trzech różnych materiałów: miedziana, brązowa oraz miedziana elektroda pozłacana.