조선후기 천문학자 이덕성의 생애와 천문활동

안영숙,민병희,서윤경,이기원,AHN, YOUNG SOOK,MIHN, BYEONG-HEE,SEO, YOON KYEONG,LEE, KI-WON 한국천문학회 2017 天文學論叢 Vol.32 No.2

The life and astronomical activity of Lee Deok-Seong (李德星, 1720-1794) was studied using various historical sources, including the astronomical almanac, Seungjeongwon-Ilgi (Daily records of Royal Secretariat of Joseon dynasty), and the Gwansang-Gam's logbooks during Joseon dynasty (A.D. 1392-1910). We present the results of the study including the following main findings. First, from the investigation of Lee's family tree, we find that a number of his relatives were also astronomers, notably Samryeok-Gwan (三曆官, the post of calendrical calculation). Second, we find that he took part in the compilation of an annual astronomical almanac over a period of at least 16 years. His major achievements in the astronomy of the Joseon dynasty were to establish a new method of calendar-making calculation and to bring astronomical materials to the Joseon court through a visit to China. The Joseon dynasty enforced the Shixianli (時憲曆, a Chinese calendar made by Adam Shall) in 1654 without fully understanding the calendar. So an astronomer and an envoy were dispatched to China in order to master the intricacies of the calendar and to learn as much of Western science as was available in that time and place. Lee Deok-Seong worked at the Gwansang-Gam (觀象監, Royal Astronomical Bureau) during the reigns of King Yeongjo (英祖) and Jeongjo (正祖). As best as we can ascertain in relation with the calculations in the Shixian calendar, Lee visited China four times. During his trips and interactions, he learned a new method for calendar-making calculations, and introduced many Western-Chinese astronomical books to Joseon academia. Lee greatly improved the accuracy of calendrical calculations, even while simplifying the calculation process. With these achievements, he finally was promoted to the title of Sungrok-Daebu (崇祿大夫), the third highest grade of royal official. In conclusion, history demonstrates that Lee Deok-Seong was one of the most outstanding astronomers in the late-Joseon dynasty.

경기도 화성시 남양분지에서 발견된 새로운 공룡알 화석산지

이융남(Yuong-Nam Lee),김복철(Bok Chul Kim),이윤수(Youn Soo Lee),기원서(Weon-Seo Kee) 한국고생물학회 2007 고생물학회지 Vol.23 No.1

2006년 경기도 화성시 송산면 고정리 공룡알화석지(천연기념물 제414호)에서 남쪽으로4㎞ 떨어진 삼존리에서 새로운 공룡알들이 산출되었다. 발견된 공룡알은 파편을 포함해 총 15개이며 이 중 한개만이 완형으로 보존되어 있다. 공룡알들은 동일 층준 3지점에서 발견되었으며 이 지층은 남양분지에 속한 시화층이다. 삼존리의 공룡알은 dinosauroid-spherulitic 기본형에 속한 새로운 공룡알이며 독특한 구조형태와 숨구멍계를 가진다. 삼존리의 공룡알은 고정리의 type 2 공룡알과 같은 종류이지만 이차적인 재결정을 더 많이 받은 상태이다. 삼존리의 공룡알 층준은 고정리의 type 2 층준처럼 적색의 이암층이며 홍수명원의 퇴적환경을 지시한다. 삼존리 공룡알 화석지는 고정리의 최하부 층준보다 최소 1㎞ 하위에 해당되어 이들 공룡들이 오랜 기간 이곳을 산란지로 이용했음을 암시한다. New dinosaur eggs were found in the Samjon-ri 3㎞ south from the dinosaur eggsite at Gojeong-ri, Songsan-myeon, Hwaseong City, Gyeonggi Province (Natural Heritage 414) in 2006. A total of 15 dinosaur eggs were discovered at the site including one complete egg. They were found in three different locations but in the same horizon of the Shiwha Formation within the Namyang Basin. All dinosaur eggs are belonging to the dinosau-roid-spherulitic basic type, but have unique structural morphotype and pore system. The Samjon-ri dinosaur eggs are the same as type 2 dinosaur eggs at the Gojeong-ri, but had undergone stronger recrystallization than the latter. The dinosaur egg bearing horizon at the Samjon-ri consists of the reddish mudstone like at the Gojeong-ri which indicates the floodplain environment. The Samjon-ri dinosaur eggsite is located at least 1 ㎞ below the lowest horizon of the Gojeong-ri dinosaur eggsite, suggesting multiple egg laying events.

지식기반 자체조인트 단면 평가 데이터를 이용한 차체 다분야 구속 최적설계 프로세스에 대한 연구

이동호(Dong-Ho Lee),기원용(Won-yong Ki),허승진(Seung-Jin Heo),김정호(Jung-Ho Kim),이경원(Kyungwon Lee) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5

To achieve effectiveness and optimized design for light weight vehicle body, many concept design methodologies have been studied. However, study using database would be not conducted yet. Therefore, In this study, it is a study on body structure multi-disciplinary optimum design process using knowledge-based body joint cross-section database. The database includes 42 competitive vehicles with 10 cross-sections. Using the database, cross section of body structure is selected for conceptual model construction. The target is reference model`s performance improvement. To select suitable cross section, what-if design method is applied. As a result, crashworthiness is about 15% and static/dynamic stiffness is 3.5% improved And also, body structure`s mass is 0.5% diminished. From this paper, it could be verified that cross-sectional performance affects body structure performance. Moreover, by evaluation of cross-section performance, fast variation of concept design would be capable.

Sedimentary Environments and Structural Evolution of the Cretaceous Namyang Basin, Korea

기원서(Weon-Seo Kee),김복철(Bok Chul Kim),이융남(Yuong-Nam Lee) 대한지질학회 2006 지질학회지 Vol.42 No.3

차량 제동성능 개선을 위한 타이어 인자 분석 및 최적설계에 대한 연구

기원용(Won Yong Ki),이광우(Gwang Woo Lee),허승진(Seung Jin Heo),강대오(Dae Oh Kang),김기운(Ki Woon Kim) 한국자동차공학회 2016 한국 자동차공학회논문집 Vol.24 No.5

Magnetic Investigation of the Yangsan Fault

권병두,이기원,Kwon, Byung-Doo,Lee, Ki-Won The Korean Society of Economic and Environmental G 1991 자원환경지질 Vol.24 No.4

경상분지내에서 가장 뚜렷한 선구조로 나타나는 양산 단층이 지나는 곳으로 생각되는 네 지역을 선정하여 육상자력탐사를 실시하였다. 정성적 분석을 위한 자료처리과정으로는 표준자기장 (IGRF) 보정, 상향 연속과 자극화 변환을 수행하였고, 정량적 해석을 위해서는 수평 2층 지하 지질구조에 있어서 하부층까지의 심도를 모델변수로 하는 비선형 자동 역산법을 적용하였다. 육상자력 이상도의 상향 연속 결과와 동일 지역에서 수행된 항공 자력 탐사자료를 비교한 바에 의하면 두 자료의 유사도가 비교적 높게 나타났다. 네 곳의 탐사지역내에서 양산 단층의 주향은 북동$6^{\circ}-15^{\circ}$의 경향이 우세하게 나타났으며, 단층의 경사는 지역적인 암상의 변화에도 불구하고 수직내지 약간 동쪽 방향의 경사를 갖는 것으로 나타났다. 탐사 지역중 가장 북쪽에 위치하는 안강부근의 제 1 탐사지역에서는 단층구조에 의한 자력효과가 화성암의 관입에 의한 효과와 함께 나타난 복잡한 양상을 띠며, 언양부근의 제 2 탐사 지역에서는 단층면을 따라 약 200 - 300 미터의 폭을 갖는 화산성, 혹은 화성 기원의 관입이 일어난 것으로 보인다. 용연 부근의 제 3 지역에서는 다른 지역과는 달리 단층운동에 의한 것으로 생각되는 파쇄대가 약 600 - 700 미터 정도의 폭으로 비교적 뚜렷하게 나타났다. 가장 남쪽에 위치하는 양산부근의 제 4 지역에서는 안산암 시료가 매우 큰 대자율 값을 보이며, 본 연구 결과 이 지역의 단층선은 기존 연구에서 제시된 단층선보다 약 500 미터 정도 동쪽으로 치우쳐 나타난다. Ground magnetic surveys were conducted at four areas where the Yangsan fault, the most prominent lineament in the Kyeongsang basin, appears to be passed through. For data processing, IGRF correction, upward continuation and reduction-to-the-pole were performed. The automatic inversion by using a matrix computation method, which takes the depth to bottom layer of the horizontal two layer structure as the model parameter, has been attempted to delineate the subsurface structure. Upward continuation of the surface magnetic map to the same level of the aeromagnetic survey (KIER, 1989) resulted in very similiar patterns to those of aeromagnetic data. Subsurface modeling of eight profile data show that the strike and dip of the Yangsan fault in study areas are $N6^{\circ}-15^{\circ}E$, and near vertical to somewhat eastward, repectively, despite of the local lithological contrast of each study area. It seems that the magnetic effect of faulting in the study area 1, which locates in the most northern part of the survey areas, is disturbed by that of igneous intrusion. At study area 2, the possibility of volcanic or igneous intrusion, which is 200-300 meters wide along the fault plane was presented. At study area 3, unlike other study areas, distinct fracture zone of 500-700 meters in width was revealed along the surface fault line. The andesitic rocks of the study area 4 have very high susceptibilities and the fault line on surface of this area was shifted about 500 meter eastward, as compared with the inferred fault line by the previous study.

다절 링크 메커니즘 최적설계 기법에 대한 연구

이호진(Hojin Lee),기원용(Wonyong Ki),정재일(Jayil Jeong),허승진(Seung-Jin Heo) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5

The multi linkage mechanism needs numerous analysis and repetitive design processes to find the optimal design. Typically, parameter study is performed to find such design. However, this process demands more time during designing, and has a difficulty to meet many constraints. In order to mitigate this problem, this study instead applies the meta-model-based designing process to the multi linkage mechanism. The processes divide into three phases. The first phase is to create a base model of multi linkage mechanism. The second phase is to create generate a meta model. An experiment point is constructed based on the forty-four design variables and Latin Hyper Cube(LHC) Design of Experiments(DOE). The last phase is to find the optimal solution that meets constraints and objectives by using an optimization algorithm. This study also seeks robustness in optimization and design by considering each variable’"s difference.

한반도 남서부 스타테로스기 화강암류의 지화학적 특성과 의미

이병춘(Byung Choon Lee),기원서(Weon-Seo Kee),변욱환(Uk Hwan Byun),김성원(Sung Won Kim) 대한지질학회 2022 대한지질학회 학술대회 Vol.2022 No.10

인도네시아 중부 칼리만탄 쿠알라쿠룬 지역의 지질: I. 층서 및 구조

김인준(In-Joon Kim),기원서(Won-Seo Kee),송교영(Kyo-Young Song),김복철(Bok-Ghul Kim),이사로(Sa-Ro Lee),이규호(Gyoo Ho Lee) 대한자원환경지질학회 2004 자원환경지질 Vol.37 No.5

인도네시아 중부 칼리만탄 쿠알라쿠룬 지역의 지질은 하부로부터 석탄-페름기의 피노변성암류, 백악기 세파욱심성 암류, 에오세말기의 탄중층과 올리고세의 말라산화산암류로 구성되며, 올리고세-마이오세초기의 신탕관입암류가 상기 한 모든 지층들을 관입하고 있다. 퇴적층인 탄중층은 전체적으로 북쪽으로부터 남쪽으로 발달하는 고수류계를 유지하 는 삼각주 환경과 천해 해저 환경에서 퇴적되었다. 고생대 후기의 변성퇴적암류가 퇴적된 이후부터 발생한 4회의 변 형작용이 인지된다. D1 변형작용은 광역변성작용을 수반한 변성암류의 습곡작용 및 S1 편리구조 형성으로 특징 지워 진다. D2 변형작용은 백악기 화강암질암 내에 발생한 연성전단작용이며, D3 변형작용은 북동 내지 동북동 방향의 축 을 갖는 습곡작용 및 이에 수반된 S2 파랑벽개의 형성으로 정의된다. D4 변형작용은 제3기 동안 남-북 방향의 압축 응력하에서 발생한 단층작용으로서, 북동 방향의 좌수향 주향이동단층, 북서 방향의 우수향 주향이동단층, 남-북 내지 북북동 방향의 정단층 등이 형성 되었다. 이 단층작용은 제3기 지층의 퇴적과 분포에 영향을 끼친 것으로 해석된다. The geology of the Kualakulun area in Middle Kalimantan, Indonesia comprises Permian to Carboniferous Pinoh Metamorphic Rocks and Cretaceous Sepauk Plutonics of the Sunda Shield, late Eocene Tanjung Formation, Oligocene Malasan Volcanics, Oligocene to early Miocene Sintang Intrusives and Quaternary alluvium. Tanjung Formation was deposited in low- and high-sinuosity channel networks developed on the proximal to distal delta plain and delta front forming southward paleoflow system, which, in turn, gradually change into shallow marine environment. Four main deformational phases are recognized: D1, folding of metamorphic rocks accompanied by development of S1 schistosity under regional metamorphic condition; D2, ductile shearing in Cretaceous granitoids; D3, folding of metamorphic rocks accompanied by S2 crenulation cleavage; D4, faulting under N-S compressional regime during Tertiary times, producing NE-trending sinistral and NW-trending dextral strike-slip faults and N-S to NNE-trending normal faults.

광주기독병원 30년간 세포유전학적 검사결과의 고찰

김윤식 ( Yoon Sik Kim ),기원진 ( Won Jin Kee ),백해경 ( Hae Kyong Back ),이상호 ( Sang Ho Lee ),신진호 ( Jin Ho Shin ) 대한임상검사과학회 2004 대한임상검사과학회지(KJCLS) Vol.36 No.2

This study was carried out to review and evaluate a total of 2,463 cases of human chromosomal analysis at Kwangju Christian Hospital from 1974 to 2004. We collected 2.0-3.0ml of human peripheral blood in heparized bottle. Then, we cultured it for 72 hours. We performed GTG-banding and chromosomal kayotyping analysis by Cytovision kayotyping system. Abnormal karyotypes were observed in 30.5% of the total cases (750/2,463). Autosome and sex chromosome anomalies were observed in 25.8% (635/2,463) and 4.7% (115/2,463) respectively. In a total of 2463 cases, there were 522 (22.4%) cases of Down``s syndrome karyotype, and 67 (2.7%) cases of Turner syndrome. In conclusion, Down``s syndrome has decreased after the end of the 1990s, but other (Turner syndrome et al.) chromosomal abnormal cases haven``t decreased after the1970s.