• 전기의세계
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• v.15 no.5
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• pp.46-49
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• 1966

본 조사연구는 한국전력주식회사의 위탁에 의하여 1967년 1월 초순에서 중순에 걸쳐, 서울대학교공과대학 응용과학연구소의 염영하, 현병구, 김동기 제교수와 같이 실시한 것이다. 즉 청평발전소 제3호 발전기(40,000KW) 설치장소의 굴착작업이 이전시설 특히 제1호와 제2호 발전기 및 그 부대시설에 미치는 영향을 조사하고, 굴착의 최적작업방법을 제시한 것이다.

• Korean journal of applied entomology
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• v.36 no.1
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• pp.83-87
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• 1997

These studies were conducted to carry out mechanism and site of gall formation by Schlectendalia chinensis in Rhus javanica. The formation period of gall hy occurrence of fundatrix was middle of June, and fundatrix was settled and parasited on back side of immature leaves and tissues of Rhus javanica was ride to fore face, then formed Schlectendalia chinensis gall. Scl~lectendalia chinensis was suddenly developed in middle of Auguest. As the density of Schlectertdalia chinensb increases, the Schlectendalia chinensir gall was more plumped. The part of phyllotaxy of Schlectendalia chinensis gall in leaf and pinnate of was increased in closer pan of terminal leaflet and leaflet was more occupied then wing.

• Korean journal of applied entomology
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• v.36 no.1
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• pp.73-76
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• 1997

This study was conducted to investigate the life cycle of Kunugia yamadai Nagano attacking Qriercrrs spp. in Chungju area, Korea during 1987-1989. The moth had one generation a year. Host plants of the species were Quercus acutissima, Q. serrata, Q. aliena, and Castanea crenata. And Q. dentata T., and Q variahilis B. were newly recognized as host plants of the insect. Young larvae were hatched from the overwintered eggs and fed on the leaves from late April to early August which took ahout 3 months. In mid-August, the fully grown larva made a rough cocoon and pupated at the ground debris or dense grass. The moths emerged from September to late October with a peak around mid-October. Female oviposited 121 eggs on average mostly on the bark of host plants at 131 cm ahove the ground.

• Korean journal of applied entomology
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• v.49 no.3
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• pp.261-264
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• 2010

Occurrences of Rhopalosipnum rufiabdominalis damage in the leaves of Japanese apricots were observed in Hadong, Gyeongnam Province, a major producing area. R. rufiabdominalis occurred from early May to mid October, with the peak occurrence of damaged leaves in mid May. To find proper timing of chemical control against R. rufiabdominalis, acetamiprid WP was sprayed weekly from 3 April, before budbreak, to 8 May in 2007. The best time for control R. rufiabdominalis was on 17 April 2007, at which the leaves were still tender and developing up to 3 to 5 leaves.

• Korean Journal of Agricultural and Forest Meteorology
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• v.5 no.2
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• pp.81-86
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• 2003

The spatial variability of soil heat fluxes in a conifer forest was investigated by meteorological measurement. The maximum daily averages of R $s_{dn}$ and Rn were about 260 W $m^{-2}$ and 180 W $m^{-2}$ . The daily average of G was typically 10% of net radiation during mid-July to mid-August. The measured soil heat flux of $G_{6}$ was suitable to calculate G within 2% error during the study period. A time delay in the maximum nux at a depth of 0.1 m by heat storage was observed. About 10 to 15 W $m^{-2}$ of error can occur, if it is neglected.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.1570-1574
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• 2009

2008년 여름 우리나라는 예년과 달리 홍수기에 북상하는 태풍이나 8월말에서 9월초까지 발생하던 장마전선의 영향을 받지 못했을 뿐만 아니라 홍수기 이후에도 중국에서 다가오는 동서고압대의 지속적인 영향으로 9월 중순 최고기온을 경신하면서, 강수가 없는 건조한 날씨가 계속되었다. 남부지방을 중심으로 8월말 이후 심화된 가뭄은 9월 중순에는 전국적으로 확산되었으며 도서지역의 부분적인 제한급수가 실시되거나 밭 작물 재배에 피해를 초래하기도 하였다. 본 연구에서는 위성영상 기반의 식생지수를 이용하여 2008년 가을가뭄의 시공간적 변화와 행정구역별, 권역별 가뭄 우심지역을 판별하였다. 또한, 가뭄정보를 제공하는 가뭄모니터링 시스템의 가뭄지수와 가뭄의 변화와 심도 등을 비교하였다. 위성영상자료는 MODIS NDVI를 이용하여 제작한 VCI와 SVI를 이용하였으며, 수자원공사의 '가뭄정보시스템'에서 제공하는 주 단위의 가뭄지수와 한국건설기술연구원 '통합수자원평가계획 시스템개발'에서 제공하는 월 단위의 가뭄지수를 활용하였다. 연구결과 행정구역상으로는 전라남 북도와 경상남도 지역이, 권역별로는 섬진 영산강 권역에서 극심한 가뭄이 발생한 것으로 판명되었으며 식생지수 기반의 가뭄발생지역 판별 결과와 기상학적 가뭄지수인 SPI와 PDSI의 가뭄분포가 유사하게 나타났다.

• The Korean Journal of Zoology
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• v.36 no.1
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• pp.36-50
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• 1993

한국산 관박쥐(Rhinolophusfewmequinum Jroma의 웅성생식 pattern을 알아보기 위하여 정소의 형태변화와 세정관 정상피의 1년주기를 조사하여 다음과 같은 결론을 얻었다. 정자형성은 5월에 시작되어 10월말에 완료되었다. 7월초부터 10월중순까지는 정자변태과정이며, 정자형성과정의 활성도가 가장 높은 달은 8월 중순경이었다. 또한 교미가 끝난 11월경부터 세정관내에는 미성숙한 정자세포가 Sertoli cell의 식작용과정의 일환으로 포식되어졌고, 91년 12월부터 92년 1월, 2월, 3월, 그리고 동면각성기인 4월의 실험군에서도 역시 점진적으로 식작용 과정을 관찰할 수 있었다. 교미가 끝난 후의 세정관 내에는 새로운 정자를 만들기 위한 준비단계로서 미성숙된 정자들이 Sertoli cell의 식작용에 의해 정화(cleaning)되므로 이 기간을 정화기간(cleaning time)이라 볼 수 있다. 따라서 정소내 세정관의 1년 주기를 볼 때 정화기간은 동면 개시기인 11월부터 익년 4월까지 약 6개월에 걸쳐 이루어 진다. 이상의 결과로 볼때, 정자형성은 동면각성 직후부터 시작하여 10월경에 완료되며 교미개시기에는 정지되고, 동면기 동안 정자형성이 일어나지 않는 점으로 보아 한국산 관박쥐는 'Pipistnfluspottem'에 속한다고 할 수 있다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.54-54
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• 2022

한국에서 자생하고 있는 Liparis 속의 11분류군 중 Liparis koreana (Nakai) Nakai을 제외하고 대부분은 경기도와 강원도부터 제주도 및 도서지방을 포함한 전국에 분포하고 있다. 최근 국내 Liparis japonica(Miq.) Maxim. 로 알려진 개체군에 대해 학명이 잘못 적용된 결과가 보고되었고, 본 개체군을 포함하여 Liparis makinoana complex에 대한 국내 개체군에 대해 재검토를 하였다. 그 결과 L. makinoana complex은 제주 Type (Type 1)과 내륙의 2 Types (Type 2, 3)으로 3 Types가 확인되었다. Type 1-3은 형태학적으로 유사하지만, 종의 형태학적 형질과 개화기, 그리고 분포지역에서 뚜렷한 차이를 보였다. Type 1은 꽃이 가장 크며, 순판은 넓은 난형이고, 개화기는 5-6월이며, 제주도에서 분포하는 것으로 확인되었다. Type 2는 꽃이 중간크기이며, 순판이 난형이고, 개화기는 6월 중순-7월 중순이며, 중북부지방에 주로 분포한다. 반면에, Type 3는 꽃이 가장 작고, 순판이 좁은 난형이고, 개화기가 6월 초-7월 초이며, 백두대간을 따라 분포하는데, Type 3는 Type 1과 Type 2에 비해 화서가 길다.

• Korean journal of applied entomology
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• v.46 no.1 s.145
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• pp.27-35
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• 2007

Seasonal occurrences of tobacco cutworm, Spodoptera litura and beet armyworm, Spodoptera exigua were observed using sex pheromone traps at different locations and climatic regions in Yeongnam district. In Gyeongnam province, S. litura male adults kept occur from mid or late March to mid or late November Whereas in Gyeongbuk province, S. litura occurred from mid or late April to early or mid November with exception at Uljin where it was late May to late October. According to the climatic regions, the peak occurrence of S. litura was middle September at the southern coast region, late August at the inland and the basin region, middle August at the inland mountainous region, and early September at the eastern middle coast region. The occurrence rate of S. litura was the highest at Jinju with 20.0% and the lowest at Changyeong with 8.6% in Cyeongnam province, while it was the highest at Sungju with 3.3% and the lowest at Uljin with 0.8% in Gyeongbuk province. In accordance with the climatic regions, the occurrence rate of S. litura was the highest at the inland region with 43.7%, and followed by the southern coast region (36.3%), the basin region (8.4%) and the inland mountainous region (7.0%), and was the lowest at the eastern middle coast legion with 4.6%. On the other hand, S. exigua occurred from early March to middle November with the exception of the eastern middle coast region including Pohang, Yeongdeog and U]ien in Cyeongbuk province where it occurred from mfd April to middle November. The peak occurrence of s. exigua was early August at the inland region, the basin region and the inland mountainous region, and was late of August at the southern coast region and the eastern middle coast region. The occurrence of S. exigua was the highest at Changyeong with 1.6% and the lowest at Busan with 0.4% in Gyeongnam province, while it was the highest at Sungju with 37.2% and the lowest at Uljin with 2.7% in Gyeongbuk province. The climatic regional occurrence rate of S. exigua was the highest at the basin region with 54.3%, and followed by the inland mountainous region (29.9%), the eastern middle coast region (9.3%) and the inland (3.9%), and was the lowest at the southern coast region with 2.6%. As a whole, S. litura occurred more in Gyeongnam province than Cyeongbuk province, while S. exigua occurred more in Gyeongbuk province than Gyeongnam province. According to the regions grouped by climatic differences, the occurrence of S. litura and S. exigua was the highest at the inland region in Gyeongnam province and at the basin region in Gyeongbuk province. The total number of S. litura captured by sex pheromone trap was 2.4 times higher than that of S. exigua. However, the first occurring time and the peak occurrence of S. exigua were slightly earlier than those of S. litura.

• Korean journal of applied entomology
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• v.48 no.1
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• pp.11-19
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• 2009

This study was performed to investigate the seasonal occurrence, developmental characteristics of each nymphal stages with different temperatures (20, 25, $30^{\circ}C$), longevity and fecundity of ussur brown katydid, Paratlanticus ussuriensis, damaging by outbreaks in the orchard areas of Bitan-ri, Yeongdong, Chungbuk. Paratlanticus ussuriensis occurred from late-March to late-August with peak of mid-May. Newly emerged nymphs appeared from March and do damaged fruit orchards with peak of mid-May when P. ussuriensis existed as 4th and 5th nymphal stages. P. ussuriensis adult occurred from early-June to mid-Aug. with peak of mid-July. Total density of P. ussuriensis was showed highest in mid-May. Paratlanticus ussuriensis goes through nymphal stages to 7th nymph, the ovipositor began exposed to outside from the 4th instar and the body weight increased heavily from this stage and the wings were observed from 6th instar. Developmental period was longer as increased the nymphal stages. Sex ratio of collected insect was showed as 0.57; females more than males. As increased the temperature, developmental period was to be short. Preoviposition was also to be short as 5.0, 4.3, and 3.4 days at 20, 25, $30^{\circ}C$, respectively, and fecundity increased as 69.0, 87.1, and 104.3 at 20, 25, $30^{\circ}C$, respectively. Longevity of male and female at $25^{\circ}C$ was showed the longest with 35.7, and 32.9 days and showed the shortest with 30.1 and 28.1 days at $30^{\circ}C$, respectively. The difference of developmental period in male and female were showed longer in female without relation of temperature. The eggs laid were frequently distributed 3 to 4 cm from soil surface, and showed the behavior laying eggs intensively when early oviposition period.