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Wyszukujesz frazę "Zinchenko, O." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Xylophagous beetles (Coleoptera) in the zones of Gomilshanski lisy National Nature Park with different management regime
Autorzy:
Meshkova, V.
Skrylnik, Y.
Bieliavtsev, M.
Zinchenko, O.
Borysenko, O.
Markina, T.
Powiązania:
https://bibliotekanauki.pl/articles/2106654.pdf
Data publikacji:
2022
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
window trap
species composition
management regime
biodiversity
Coleoptera
xylophage
Gomilshanski lisy National Nature Park
Opis:
The purpose of the research was to assess the species composition and biodiversity indices for xylophagous beetles collected by window traps in the parts of Gomilshanski lisy National Nature Park with different management regimes and anthropogenic load. Four window traps were placed in each of the five groups of sample plots: clear felling, selective felling, stationary recreation, regulated recreation and protected zone. The data were analysed using the statistical software package PAST, particularly, the Menhinick index (DMn) and dominance index (D) were evaluated and classical clustering (unweighted pair-group average [UPGMA]) was performed. A total of 42 species of xylophages (9903 individuals) were collected from Curculionidae (Scolytinae and Cossoninae), Cerambycidae, Histeridae, Bostrichidae, Buprestidae and Lymexilidae. The highest species richness was in the plots of clear and selective felling (25 and 22 species, respectively) and the lowest was in the protected zone (16 species), regulated recreation (19 species) and stationary recreation (22 species). The Menhinick index (DMn) was the lowest in the protected zone (0.27), increased in the zone of regulated recreation (0.43) and stationary recreation (0.45) and was maximal in the plots of selective and clear felling (0.69 and 0.77, respectively). The number of individuals was maximal in the protected zone and minimal at the plots of selective and clear felling. All sites were dominated by Xyleborinus saxesenii (Ratzeburg, 1837) (66–85% individuals) and Anisandrus dispar (Fabricius, 1792) (8.5–20.7% individuals). Minimal dominance (0.49) was found in the plot of clear felling. Cluster analysis showed similarity of the xylophage complex in the plots of clear and selective felling, as well as in the zone of stationary and regulated recreation, which differed from the protected zone.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2022, 64, 2; 69-82
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charging Device of Capacitive Energy Storage for Micro Resistance Welding
Autorzy:
Kozhushko, Y.
Karbivska, T.
Zinchenko, D.
Pavković, D.
Rosolowski, E.
Bondarenko, O.
Powiązania:
https://bibliotekanauki.pl/articles/410521.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
micro resistance welding
supercapacitor
capacitive energy storage
flyback converter
Opis:
Micro resistance welding is the most common technology for making permanent connection between two conducting materials. This paper proposes a high-efficiency charging device for the capacitive energy storage within the micro resistance welding device power supply utilizing a Flyback converter. Based on the comprehensive analysis of charging device losses, it is determined that one of the main sources of conduction losses in the charging device is the output diode. In order to ameliorate this problem, utilization of a MOSFET transistor as an output diode within the Flyback converter is proposed in order to increase its overall efficiency. The presented results suggest that the proposed Flyback converter topology could improve the power efficiency by 7.0% at 50 kHz switching frequency through minimization of conduction losses in comparison with the traditionally-used Schottky diode.
Źródło:
Present Problems of Power System Control; 2018, 9; 5-17
2084-2201
Pojawia się w:
Present Problems of Power System Control
Dostawca treści:
Biblioteka Nauki
Artykuł
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