• Korean Journal of Ichthyology
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• v.24 no.4
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• pp.247-252
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• 2012

Structure on the feeding organs in two Korean ricefishes, Oryzias latipes and O. sinensis, was examined in the jaws and the teeth. In the jaw, O. latipes has a dent on the dorsal edge of distal arm of premaxilla (vs. straight in O. sinensis) and a alveolar arm of premaxilla running in straight line with distal arm of premaxilla (vs. ventra line in O. sinensis). O. latipes has also a dent on the posterior edge of dentary which is connected to coronoid process of dentary (vs. straight in O. sinensis). Large teeth developing only in the male, which is sexual dimorphism, developed into outside direction of the mandible in O. latipes (vs. dorsal direction in O. sinensis). In the teeth forms, O. latipes has two types (conical type and arrowhead type), whereas O. sinensis has only one type (conical type). Through this study, we confirmed that two Korean ricefishes show distinctive characteristics in the structure of the feeding organs.

• Journal of the Korean Geophysical Society
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• v.8 no.2
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• pp.89-92
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• 2005

For the understanding the locus of the Quinling-Dabie-Sulu continental collision’s boundary and the underground structure of the sedimentray basin in the Yellow Sea, three dimensional density modelling is carrid out by using gravity dataset (Free Air Anomaly), which is measured by Tamhae 2, GIGAM in a period 2000-2002. The measured gravity anomaly in the investigations area is mainly responsed by depth distribution of the sedimentary basin. After comparing the sea-measured gravity data to CHAMP-GRACE satellite gravity data, I suggested that the high density model bodies extend mainly from the southern part of China to the middle-western part of the Korean Peninsula, which might be emplaced along the continental collision’s boundary. The total volume of very low density bodies modified by modelling might be about 20 000 km3.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.2303-2315
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• 2008

Finally, Musan-Bongdong section in Kyeong-Ui corridor opened on 11. DEC.2007, which is a historical event, because this connection means the restoration of 56 yrs' disconnection since 1951 and also starting point launching to connect china, Mongolia, Russia for continental railway logistic infrastructure. This is also one of master plans about the northern line in TAR, carried out by UNESCAP, so this study will touch up each country's railway status and the next tasks related with trans-continental railway such as North Korea, Russia, China. Also, this study reveal a mid-long term development strategy to improve the North Korea railroad for a continent rail link and international railroad transportation between China and Russia, and also checks the way of confrontation to the domestic infrastructure for the activation of the continent railway and the north and south, investigates concretely how to establish TAR northern part routes as soon as possible.

• Korean Journal of Ichthyology
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• v.18 no.3
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• pp.163-169
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• 2006

The Korean ricefish, Oryzias, consisted of 2 species, O. latipes and O. sinensis. Through investigation on their distributions, it was confirmed that O. sinensis was restricted to western areas, and O. latipes was distributed throughout Korea. Interestingly, Daecheon region near the West Sea was sympatric, existing O. latipes and O. sinensis. In addition to their distributions, O. latipes was well distinguished from O. sinensis as the following morphological characteristics: mean 31 vertebrae (vs. 30), mean 15 gill rakers (vs. 12), lots of dots in both sides of body (vs. absent), and yellowish ventral and anal fins (vs. blackish).

• Korean Journal of Environmental Biology
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• v.37 no.1
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• pp.88-92
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• 2019

The objective of this study was to report the group mating of Asian Keelback snake, Hebius vibakari, in South Korea. On May 20, 2009, the group mating of H. vibakari was observed in the Maeng-gol do, Jindo-gun, Jeollanam-do, in the rocky area (107 m above sea level) on the ridge of the island. Six female and five male snakes made a form of mating behavior called "mating ball". Two couples showed "tail-wrestling" which is the copulation behavior in snake species. During the mating, the temperature and humidity were $25.7^{\circ}C$ and 59%, respectively. The result of this study was the first case report of the group mating in H. vibakari, a rare reptile.

• Korean Journal of Ichthyology
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• v.35 no.1
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• pp.20-29
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• 2023

In order to identify the spawning characteristics of Barbatula nuda, seven surveys were conducted from March to May 2021 in the Sangcheoncheon Stream, a tributary of the Bukhangang River, Korea. During the survey period, 890 individuals were collected, and the sex ratio of female to male was 1 : 1.34. B. nuda spawned 15 March to 24 April, when temperature was 12~15.7℃. Total length of the individual with minimum maturity was 56.7 mm, and it was a 1-year-old. Spawning was observed from individuals with a total length of 80.5 mm more, and it was 2-year-old. The total length at 50% group maturity was 67.2 mm. As a result of injecting 10 IU/g of HCG hormone into B. nuda, about 15 hours later, spawning behavior in which the male wrapped around the body of the female in a circle was observed. After spawning, females and males rested, and fertilized eggs were feed by individuals not participating in spawning.

• 월간 기계설비
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• s.234
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• pp.45-53
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• 2010

지난 1988년 2월 남극반도 남쉐틀랜드 군도의 킹조지섬과 넬슨섬으로 둘러싸인 맥스웰만 연안에 건설된 남극세종과학기지. 우리나라는 지구상의 유일한 비오염 지역인 극지 연구를 위해 세종기지를 건설하고 연구활동을 벌이고 있다. 세종기지 건설은 현대그룹의 현대건설, 현대엔지니어링, 현대중공업이 수행했다. 세종기지는 과학사적 의미와 함께 혹독한 자연환경을 극복하고 건설에 성공했다는 점에서 국내 건설사의 한 페이지를 장식하는 시설물이다. 이제 제2남극대륙기지 건설이 추진 중이다. 현재 건설 후보지 정밀 조사 중으로 정밀조사가 끝나면 건설사 선정 등 사업이 본격적으로 진행될 예정이다. 제2남극대륙기지 건설에 어떤 건설사 및 설비건설업체가 참여할지 주목된다. 한국해양연구원 극지연구소가 제공한 자료와 건설사 취재 등을 토대로 세종과학기지 건설과정을 살펴보고 제2남극대륙기지 건설계획을 전망해본다.

• 한국신재생에너지학회:학술대회논문집
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• 2007.06a
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• pp.524-527
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• 2007

남극 반도 북부해역은 남극대륙 주변부에 존재하는 가스하이드레이트 매장 유망지역중의 하나이다. 남극반도 북부해역내에서 BSR이 가장 뚜렷이 나타나는 남셰틀랜드 군도의 대륙주변부에서 가스하이드레이트 특성 및 분포를 연구하기 위한 탄성파 탐사가 1992년, 2005년도 수행되었다. 이 지역에 나타나는 BSR은 대륙사면에서 광범위하게 발달되어있다. 이 지역 BSR에 대한 AVO 분석결과에 의하면 BSR상부지층은 높은 탄성파 속도를 갖으며 하부지층은 가스를 포함하는 것으로 밝혀졌다. 탄성파 단면에 나타난 BSR의 발견지역을 대상으로 분포도를 작성하였으며, 이 지역에 대한 추가적인 탄성파 탐사 완료 후에는 정확한 매장량과 분포가 밝혀질 것이다.

• 한국균학회소식:학술대회논문집
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• 2009.10a
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• pp.20-26
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• 2009

Listeromyces insignis, a species new to Mainland China, is reported and illustrated based on the specimen collected from dead branches at Mount Yuelu, Hunan Povince. This is the first report of the genus Listeromyces in Mainland China. The examined specimen is deposited in the Herbarium of the Department of Plant Pathology, Shandong Agricultural University (HSAUP).

• Economic and Environmental Geology
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• v.24 no.1
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• pp.57-62
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• 1991

This study presents results of thermal stress calculations around the uplifted province within the continental lithosphere. A set of thermal stresses for the uplifted provinces are calculated using by assumption of two dimensions along the extension of the strike. The calculations utilize thermoelastic displacement potential function. Thermal stress distribution-faulting conditions inferred from this study are consistent with the suggested surface heat flow and place an important constraint on the thermal state of the uplifted provinces within the continental lithosphere.