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김찬수(Kim, Chan-Soo),서연옥(Seo, Yeon-Ok) 제주학회 2021 濟州島硏究 Vol.56 No.-
두메메밀이 『Species Plantarum』에 기록된 1753년 이래 메밀속 식물은 지금까지 268년간 30종이 기록되었다. 9년에 1종정도 발견된 셈이다. 본 연구에서는 지금까지 발견된 메밀속 식물 발견의 역사와 생물학적 특성을 정리하여 이후 연구의 기초자료로 제공하고자 한다. 메밀의 발견사는 다음과 같이 크게 나누어 볼 수 있을 것이다. 첫째, 1900년대 이전 시기다. 18세기 중반 첫 기록 이후 20세기가 열리기 전까지 135년 동안 단 3종만이 기록되었다. 이 메밀들은 식량이나 약용으로 장기간 이용돼왔다는 점에서 본연구에서 진정 메밀로 부르고자 한다. 둘째, 20세기 개시 직전인 1888년부터 2차 세계대전이 종전된 1945년까지다. 이 시기는 탐사의 시대라 할 수 있다. 이 기간 7종의 메밀속 식물이 발견되었으며, 이 종들은 탐사 메밀이라고 부르고자 한다. 셋째, 1981년 Fagopyrum tibeticum이 발견된 후로 현재까지다. 불과 40년이 흘렀을 뿐인데 20종이나 되는 메밀속 식물을 발견한 것이다. 이 시기 새로운 종의 발견은 미래를 위한 유전자원 확보 차원 성격이 강하다. 이 시기 발견한 메밀은 미래자원 메밀로 칭하 려고 한다. 지금까지 발견된 30종 중 F. cymosum, F. statice, F. urophyllum 등 3종은 다년생, 나머지는 모두 1년생 식물이었다. F. cymosum, F. esculentum, F. homotropicum, F. tataricum 등 4종은 큰키메밀그룹에 속하고 나머지는 나무메밀그룹에 속했다. 큰키메밀 그룹은 꽃덮이로 수과를 부분적으로 덮고 가로로 긴 자엽을 갖는 특성, 나무메밀은 꽃덮이로 완전히 덮인 수과와 세로로 긴 자엽을 갖는 특성을 갖는 것이다. 또한, F. cymosum, F. esculentum, F. tataricum 등 3종은 큰 수과그룹이었다. 큰 수과 그룹은 꽃이 진 후에도 계속 남아 있는 꽃덮이보다 종자가 훨씬 더 길고, 작은 수과 종에서보다 종자가 더 크다. Since 1753, when Fagopyrum tataricum was recorded in 『Species Plantarum』, 30 species have been recorded for 268 years in Fagopyrum. This means that one species is discovered every nine years. In this study, the history and biological characteristics of buckwheat plants discovered so far are summarized and provided as basic data for future research. The history of the discovery of buckwheat can be roughly divided into three periods as follows. First, it is the period before 1900. From the first record in the mid-18th century until the opening of the 20th century, only three species were recorded in 135 years. Since these buckwheats have been used for a long time for food and medicinal purposes, we would like to call them true buckwheat here. Second, from 1888, just before the beginning of the 20th century, to 1945, when World War II ended. This period can be called the age of exploration. Seven species of buckwheat were discovered during this period, and these species will be referred to as exploration buckwheat. Third, since the discovery of Fagopyrum tibeticum in 1981, it is still present. Only 40 years have passed, but 20 species of buckwheats have been discovered. The discovery of new species at this time has the character of securing genetic resources for the future. Buckwheat discovered during this period is intended to be called future resource buckwheat. Among the 30 species discovered so far, 3 species including F. cymosum, F. statice, and F. urophyllum were perennials, and the rest were annual plants. Four species, F. cymosum, F. esculentum, F. homotropicum, and F. tataricum, belonged to the cymosum group, and the rest belonged to the urophyllum group. Cymosum group has the characteristics of partially covering the aceae with perianths and having transversely long cotyledons, while the urophyllum group has the characteristics of having the achene completely covered with perianths and having longitudinally long cotyledons. Also, the three species, F. cymosum, F. esculentum, and F. tataricum, were species of a big achene group. A big achene group have much longer seeds than perianths that remain after flowering, and have larger seeds than small achene group.
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김찬수 ( Chan Soo Kim ),조규갑 ( Kyu Kab Cho ) 기술경영경제학회 2007 Journal of Technology Innovation Vol.15 No.2
The striking characteristic of the contemporary global security environment is that the nature of threats has become diverse and complex. For example, transnational and non-military threats including terrorism and proliferation of weapon of mass destruction has increased. In this security environment, Advanced countries funnel their investments for defense budgets into the assurance of key force capability and R&D of cutting-edge core technologies, in consideration of future battlefield environments so as to get an edge on not only defense science and technology but also intelligence capabilities. As shown by past practices of the korea`s defense acquisition, the ministry of national defense has tried to enhance its force capabilities in the short-term by purchasing foreign weapon systems rather than by investing in domestic R&D. Accordingly, the technological gaps between the korea and advanced countries were avoidance of technological transfer by advanced countries. Thus, for the effective execution of the R&D budget and the successful performance of the projects, the importance of selection, management and evaluation of the R&D projects is emphasized. So, The objective of this study is that the analysis of the proposal-selection evwidened due to both insufficient investment in development of domestic technologies and aluation system for the realization of the successful defense core technology R&D projects. This study focused on the improvement of the proposal-selection evaluation model which can be applicable to the national defense core R&D projects. Using the improved proposal-selection evaluation system, we propose a model to enhance the reliability of the national defense core technology R&D project evaluation system.
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6자유도를 갖는 병렬형 기구의 병진속도와 회전속도 성능 지표에 관한 연구
김찬수(Kim, Chan-Soo) 한국게임학회 2010 한국게임학회 논문지 Vol.10 No.6
본 논문에서는 6자유도를 갖는 병렬형 기구의 출력 속도 공간에서 성능을 평가할 수 있는 지표를 제안하였다. Manipulability와 condition number에 기반을 둔 성능 지표가 단위계의 볼일치로 인한 물리적 의미의 결함이 없도록 출력공간을 병진속도 공간과 회전속도 공간으로 분리하는 방법을 제안하였다. 각 공간에서 단위 입력에 대용하는 mobility ellipsoid를 정의하여 이를 기반으로 병진운동 출력공간에서 두 종류 성능 지표와 회전운동 공간에서 두 종류의 성능 지표를 제안하였다. In this paper, mobility performance indices are proposed which may be used to estimate characteristics of output velocity space in six-degree-of-freedom parallel mechanism. In order for manipulability and condition number to not suffer from lack of the physical meaning due to dimensional inhomogeneity, output space is partitioned into translational velocity space and rotational velocity space, respectively. In each space, mobility ellipsoids corresponding to unit input space are defined and two types of mobility performance in translational velocity spaces indices are derived. Two types of mobility performance in rotational velocity spaces indices are derived.
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다중시기 위성영상과 토지 통계자료를 이용한 토지피복 변화 예측: 천안시,아산시를 사례로
김찬수 ( Chan Soo Kim ),박지훈 ( Ji Hoon Park ),장동호 ( Dong Ho Jang ) 한국지형학회 2011 한국지형학회지 Vol.18 No.1
This study analyzes the change in land-cover based on satellite imagery to draw up land-cover map in the future, and estimates the change in land category using statistical data of the land category. To estimate land category, this study applied the double exponentially smoothing method. The result of the land cover classification according to year using satellite imagery showed that the type with the largest increase in area of land cover change in the cities of Cheonan and Asan was artificial structure, followed by water, grass field and bare land. However forest, paddy, marsh and dry field were reduced. Further, the result of the time-series analysis of the land category was found to be similar to the result of the land cover classification using satellite imagery. Especially, the result of the estimation of the land category change using the double exponentially smoothing method showed that paddy, dry field, forest and marsh are anticipated to consistently decrease in area from 2010 to 2100, whereas artificial structure, water, bare land and grass field are anticipated to consistently increase. Such results can be utilized as basic data to estimate the change in land cover according to climate change in order to prepare climate change response strategies.
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