• Title/Summary/Keyword: 기록집

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A Study on Lifespan and Longevity for Pipistrellus abramus (Chiroptera, Vespertilionidae) in Korea (한국에서 집박쥐(Pipistrellus abramus)의 장기 생존과 수명에 관한 연구)

  • Kim, Sung-Chul;Jeon, Young-Shin;Han, Sang-Hoon;Chung, Chul-Un
    • Korean Journal of Environmental Biology
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    • v.36 no.4
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    • pp.550-553
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    • 2018

  • The lifespan of bats is longer compared to that of other similarly sized mammals, and it is recorded that some bats' lifespan is more than 30 years. However, it is known that the lifespan of Pipistrellus abramus using human residential areas as their habitats is less than five years. We have put aluminum rings on the forearms of 284 P. abramus starting from 2008. Interestingly, in June 2018, a female adult bat was recaptured ten years after the aluminum ring was attached. The results of this study on the lifespan of P. abramus is new and it's likely to form the baseline for lifespan studies and habitat management of P. abramus in the future.

  • https://doi.org/10.11626/KJEB.2018.36.4.550 인용 PDF KSCI

Evaluation of Applicability of Impulse function-based Algorithm for Modification of Ground Motion to Match Target Response Spectrum (Impulse 함수 기반 목표응답스펙트럼 맞춤형 지진파 보정 알고리즘의 적용성 평가)

  • Kim, Hyun-Kwan;Park, Duhee
    • Journal of the Korean GEO-environmental Society
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    • v.12 no.4
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    • pp.53-63
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    • 2011

  • Selection or generation of appropriate input ground motion is very important in performing a dynamic analysis. In Korea, it is a common practice to use recorded strong ground motions or artificial motions. The recorded motions show non-stationary characteristics, which is a distinct property of all earthquake motions, but have the problem of not matching the design response spectrum. The artificial motions match the design spectrum, but show stationary characteristics. This study generated ground motions that preserve the non-stationary characteristics of a real earthquake motion, but also matches the design spectrum. In the process, an impulse function-based algorithm that adjusts a given time series in time domain such that it matches the target response spectrum is used. Application of the algorithm showed that it can successfully adjust any recorded motions to match the target spectrum and also preserve the non-stationary characteristics. The modified motions are used to perform a series of nonlinear site response analyses. It is shown that the results using the adjusted motions result in more reliable estimates of ground vibration. It is thus recommended that the newly adjusted motions be used in practice instead of original recorded motions.

  • https://doi.org/10.14481/jkges.2011.12.4.6 인용 PDF KSCI

Evaluation for Fundamental Periods of Domestic Rockfill Dams with Micro-earthquake Records (미소지진 계측기록을 활용한 국내 사력댐 고유주기 산정방법)

  • Ha, Iksoo
    • Journal of the Korean GEO-environmental Society
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    • v.12 no.6
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    • pp.53-60
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    • 2011

  • The purpose of this study is to propose a method that can reliably evaluate the fundamental period of a rockfill dam using the micro-earthquake records, which were obtained at the domestic dam sites. For total 20 micro-earthquake records obtained at 7 domestic rockfill dam sites against 6 earthquake events which recently occurred, the fundamental periods of seven rockfill dams were evaluated by two kinds of methods; one is a method using acceleration amplification ratio and the other is a method using acceleration response spectrum ratio. Applicability of each method to evaluation of fundamental periods of domestic rockfill dams was examined. In the moderate seismicity region like our country, the method using acceleration response spectrum ratio, which could evaluate the fundamental period of the rockfill dam using the ratio between the response spectrum for acceleration observed at the dam crest and that observed at the dam base or abutment, proved to be reliable and was proposed in this study. From the results of analyses, it was found that the proposed method could consistently evaluate the fundamental period of the rockfill dam and the results obtained by the proposed method were very similar to the results by the existing method which was proposed from the analysis for the earthquake records observed at Japanese dam sites.

  • https://doi.org/10.14481/jkges.2011.12.6.6 인용 PDF KSCI