Autor: Duda, Grzegorz. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Tuning of characteristics of dynamic driving suspensions in an autonomous robot with omnidirectional wheels
Autorzy:: Duda, Sławomir
Gembalczyk, Grzegorz
Klein, Wojciech
Dudek, Olaf
Powiązania:: https://bibliotekanauki.pl/articles/2086973.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: passive suspensions
control of vibration
mobile robots
Opis:: The article presents results of a research and development work on a suspension of an autonomous mobile robot with omnidirectional wheels. At the beginning, the research object and requirements for suspensions in mobile platforms are discussed. In the following part, a computational model used in the optimization process is presented. An important issue was to determine kinematic excitations generated by omnidirectional wheels, which was identified experimentally and used in numerical calculations. The obtained results were experimentally verified by tests with a prototype suspension node which was mounted on the “vehicle quarters” test stand.
Źródło:: Journal of Theoretical and Applied Mechanics; 2022, 60, 2; 293--302
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Developing a test site for testing the suspension of vehicles with omnidirectional wheels
Autorzy:: Duda, Sławomir
Dudek, Olaf
Gembalczyk, Grzegorz
Machoczek, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/2146604.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:: omnidirectional wheel
stand for determining excitations
koło wielokierunkowe
wyznaczanie wymuszeń
Opis:: The paper presents a test site for determining the excitations that occur as a result of the contact between the omnidirectional wheel and the road and affect the single suspension column in motor vehicles. The specific nature of these excitations during the movement of omnidirectional wheels is caused by the irregular envelope of the wheel. The proposed test site enables to determine the vertical displacements of the wheel that is rolling along the paving of the road. The conducted experiment demonstrates that the test site was constructed correctly.
Źródło:: Vibrations in Physical Systems; 2020, 31, 3; art. no. 2020304
0860-6897
Pojawia się w:: Vibrations in Physical Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Structural aspects of the antioxidant activity of lutein in a model of photoreceptor membranes
Autorzy:: Wisniewska-Becker, Anna
Nawrocki, Grzegorz
Duda, Mariusz
Subczynski, Witold
Powiązania:: https://bibliotekanauki.pl/articles/1039793.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: macular xanthophylls
singlet oxygen
lutein
antioxidants
lipid domains
AMD
Opis:: It was shown that in membranes containing raft domains, the macular xanthophylls lutein and zeaxanthin are not distributed uniformly, but are excluded from saturated raft domains and about ten times more concentrated in unsaturated bulk lipids. The selective accumulation of lutein and zeaxanthin in direct proximity to unsaturated lipids, which are especially susceptible to lipid peroxidation, could be very important as far as their antioxidant activity is concerned. Therefore, the protective role of lutein against lipid peroxidation was investigated in membranes made of raft-forming mixtures and in models of photoreceptor outer segment membranes and compared with their antioxidant activity in homogeneous membranes composed of unsaturated lipids. Lipid peroxidation was induced by photosensitized reactions using rose Bengal and monitored by an MDA-TBA test, an iodometric assay, and oxygen consumption (using EPR spectroscopy and the mHCTPO spin label as an oxygen probe). The results show that lutein protects unsaturated lipids more effectively in membranes made of raft-forming mixtures than in homogeneous membranes. This suggests that the selective accumulation of macular xanthophylls in the most vulnerable regions of photoreceptor membranes may play an important role in enhancing their antioxidant properties and ability to prevent age-related macular diseases (such as age-related macular degeneration (AMD)).
Źródło:: Acta Biochimica Polonica; 2012, 59, 1; 119-124
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Evaluation of Stormwater System Influence on the River Using Algae
Autorzy:: Babko, Roman
Szulżyk-Cieplak, Joanna
Danko, Yaroslav
Duda, Sylwia
Kirichenko-Babko, Marina
Łagód, Grzegorz
Powiązania:: https://bibliotekanauki.pl/articles/123804.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: stormwater system
river
water quality
bioindication
algae environmental indices
Opis:: One of the widespread sources of river pollution is the wastewater coming from both wastewater treatment plants and the stormwater system. Wastewater can vary significantly in composition and concentration of substances introduced into water bodies. Municipal effluents may contain significant amounts of organic matter and ammonia. Storm drains are diverse in composition and depend on the nature of the surface from which the water collects, but carry more suspended solids and less nutrients. The research was aimed at assessing the effect of surface runoff collected by the stormwater system from the territory of the city of Lublin on the Bystrica River using popular environmental indices, calculated on the basis of periphytonic algae species abundances: species number, Shannon’s H, rarefied species number, Pielou’s evenness, trophic diatom index (TDI). It was observed that the correspondence between a species diversity and the quality of the environment is not always straightforward. Therefore, the periphytonic algae diversity increases under the influence of runoff, as evidenced by the Shannon index. Nevertheless, pronounced changes are noted in the structure of the algal community, as shown by the Pielou index and NMDS. However, these changes in the structure are invisible if the trophic diatom index (TDI) is relied upon.
Źródło:: Journal of Ecological Engineering; 2020, 21, 2; 214-221
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Effect of Stormwater System on the Receiver
Autorzy:: Babko, Roman
Szulżyk-Cieplak, Joanna
Danko, Yaroslav
Duda, Sylwia
Kirichenko-Babko, Marina
Łagód, Grzegorz
Powiązania:: https://bibliotekanauki.pl/articles/123491.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: surface water quality
stormwater
bioindication
algae
saprobity
Opis:: The surface water quality assessment could be based on a combined physical and chemical analysis, but it could also be determined with bioindication methods. Classical physicochemical analysis is in most cases more expensive and time-consuming than the bioindication methods. This type of analysis also requires expensive equipment and shows the situation in the water only at the moment of sampling. Although the bioindication methods are often complicated, they allow a relatively inexpensive estimation of the water quality. Moreover, during their implementation, the substances harmful to the environment are not generated, and the obtained results usually reflect the total interaction of all factors and substances to the analyzed living organisms. Indicator organisms or their communities applied to the research, with identified ranges of tolerance to selected factors, could help to determine the physical and chemical parameters of water. This paper presents a bioindication study with an effect of stormwater system on the receiver – the Bystrzyca river, in Lublin, Poland. The level of saprophyty of the river sector was calculated based on the selected species of algae (diatoms and green algae) and the influence of the stormwater discharge on the communities of these organisms was determined.
Źródło:: Journal of Ecological Engineering; 2019, 20, 6; 52-59
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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