• 제목/요약/키워드: insect

검색결과 2,651건 처리시간 0.026초

곤충비행에서 추력발생에 관한 2차원 유동장 특성 - 와류정체 및 와류 짝 현상 (TWO-DIMENSIONAL FLOW PROPERTIES OF INSECT FLIGHT ABOUT THRUST GENERATION - VORTEX STAYING AND VORTEX PAIRING PHENOMENA)

  • 이정상;김진호;김종암
    • 한국전산유체공학회:학술대회논문집
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    • 한국전산유체공학회 2006년도 추계 학술대회논문집
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    • pp.126-129
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    • 2006

  • Many researchers have made an effort to explain flight mechanism of flapping insects. As a result, several unsteady mechanisms about lift generation in insect flight have been proposed. But it has a limits to elucidate insect's forward flight and abrupt thrust, because most of these are about insect's hovering flight. For this reason, the objective of this paper is to simulate "Figure-of-eight motion" of insect's wing during tethered flight for comprehending aerodynamic property in insect's forward flight.

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Analysis of Seven Islands with Insect Fauna and Vascular Plant Flora in Gogunsan Archipelago, Korea

  • Hwang, Jeong Ho;Yim, Mean-Young;An, Seung-Lak;Paek, Woon-Kee;Lee, Wang-Hee
    • Proceedings of the National Institute of Ecology of the Republic of Korea
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    • 제3권1호
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    • pp.23-31
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    • 2022

  • The analysis of seven islands in Gogunsan archipelago, Korea with insect fauna and vascular plant flora was carried out based on a field survey conducted in May, July, and September. As a result, a total of 2,817 insect individuals including 264 species and 315 taxa of vascular plant were recorded. Bangchukdo the largest island among the seven islands showed the largest number both insect species and plant taxa. The similarity analysis suggested that the nearness of each island strongly affected the insect fauna and vascular plant flora on each island. In addition, there was significant correlation between the areas of each island and the numbers of insect species (Spearman's correlation coefficient=0.857, P-value=0.014). In the future, the results of this study can be used as data related to island ecology and conservation.

  • https://doi.org/10.22920/PNIE.2022.3.1.23 인용 PDF

솔잎혹파리의 생태와 방제전략 (The Eclogy of the Pine Needle Gall Midge (Thecodiplosis japonensis Uchida et Inouye) ana Its Control Strategies)

  • 현재선
    • 한국응용곤충학회지
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    • 제21권3호
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    • pp.163-166
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    • 1982

  • The pine needle gall midge, Therodiplosis japonensis Uchida et Inouye, is the most important insect pest. It requires two different habitats for the development; on trees and under the ground. The habitat specific mortality rates ere $30\~40\%,\;and\;50\~60\%$ for the respective habitats. The key developmental stage is the prepupa, and the key mortality factor is the moisture contents of the soil and its variability. Since the insect is an exotic, the population status is the periphery and in the source of infestation are considerably different. Such a difference in habitats and the population status of the insect should be considered in relation to suppression of the insect. The control strategies should be directional and rational based on the reality of the pest status. There have been substantial information on the control methods of the pine needle gall midge, and each control method has an important place, but none has always provided a satisfactory solution to the many problems associated by this insect. These methods should be applied to a system based on the ecology of the insect. There should be continued support for directed effort on the development of operational management systems for the insect: specifically, estmation of the critical economic injury level, and of the absolute density of the insect.

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