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      • KCI등재

        단보논문 : 벡터내적 기반 카메라 자세 추정

        전재춘 ( Jae Choon Chon ) 大韓遠隔探査學會 2008 大韓遠隔探査學會誌 Vol.24 No.6

        본 저자가 제안한 카메라 외부표정에서 광속조정법에 기반한 카메라 자세계산 방법을 보완하기 위해 (전재춘과 Shankar, 2007,2008), 본 논문은 카메라 자세를 벡터내적으로 결정하는 방법을 소개한다. 카메라 위치를 기준으로 각 지상기준점의 방향벡터와 카메라 광축 단위벡터간의 사잇각을 통하여 이 단위벡터를 계산하는 것이다. 카메라 위치는 벡터내적에 의해 계산된다. 카메라의 수평/수직 단위벡터는 Yakimovsky와 Cunningham(1978)의 카메라 모델(CAHV)을 이용하였다. In order to improve a camera rotation calculation based on the bundle adjustment in Chon`s camera motion (Chon and Shankar, 2007, 2008), this paper introduces a method calculating the camera rotation. It estimates a unit vector in the optical axis of a camera through the angles between the optical axis and vectors passing a camera position and ground control points (GCP). The camera position is estimated by using the inner product method proposed by Chon. The horizontal and vertical unit vectors of the camera are determined by using Yakimovsky and Cunningham`s camera model (CAHV) (1978).

      • Allelopathic Potential and Antioxidant Activity of Leaf Extracts from Several Wild Plant Species

        Chon,Sang-Uk,Cha,Young-Ju 한국자원식물학회 2004 Plant Resources Vol.7 No.1

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

        Several wild plant species are known to contain biologically active substances that are allelopathic to weed species as well as antioxidant to foods. Plant extracts or residues from leaves of 4 species, Achyranthes japonica (speedwell), Cucumis sativus (Cucumber), Trifolium repens (white clover), and Vicia angustifolia (narrowleaf vetch) were bioassayed against Medicago sativa (alfalfa) or Echinochloa crus-galli (barnyard grass) to determine their allelopathic effects, and used for measurement of antioxidant activities. The aqueous extracts applied on filter paper significantly inhibited root growth of alfalfa. Aqueous extracts or residues from V. angustifolia showed the most inhibitory effect on alfalfa or barnyard grass seedling growth and followed by A. japonica and T. repens. Oxidative stability by Rancimat method, antioxidant activity by TBA (2-thiobarbituric acid) method and DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity for the ground samples or methanol extracts were the greatest in V. angustifolia, although were less than those of commonly used antioxidants, BHT (butylated hydroxytoluene) and ascorbic acid. These results suggest that the wild plant species had potent allelopathic and antioxidant activities, and that their activities differed depending on plant species.

      • Phytotoxic Effect of Lettuce (Lactuca sativa L.) Leaf Extract on Seedling Growth of Crops and Weeds

        Chon,Sang-Uk,Choi,Seong-Kyu 한국자원식물학회 2004 Plant Resources Vol.7 No.1

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

        Lettuce (Lactuca sativa L.) is known to contain water-soluble substances that are biologically active. Aqueous or methanol extracts and residues from leaves of lettuce plants were assayed to determine their allelopathic effects, and the causative allelochemicals from fractions were quantified by means of HPLC analysis and bioassayed. Extracts from oven-dried leaf samples were more phytotoxic than those from freeze-dried samples. Leaf extracts of 40 g L^-1 were completely inhibitory on root growth of alfalfa (Medicago sativa L.), while root growths of barley (Hordeum vulgare L.) and soybean (Glycine max L.) were less sensitive. Early seedling growth of both alfalfa and barnyard grass (Echinochloa crus-galli) was significantly reduced by methanol leaf extracts. The major allelopathic substances analyzed by HPLC were coumarin, trans-cinnamic acid, o-coumaric acid, p-coumaric acid and chlorogenic acid. Of them p-coumaric acid was found as the greatest amount (8.9 mg 100 g^-1) in the EtOAc fraction; only coumarin was found in all the fractions. Hexane and EtOAc fractions of L. sativa reduced alfalfa root growth more than did BuOH and water fractions. These results suggest that lettuce had potent herbicidal activity, and that its activity differed depending on type and amount of causative compounds by fraction.

      • KCI등재

        불완전한 주체와 진리의 윤리

        여태천(Yeo, tae?chon) 한국비평문학회 2012 批評文學 Vol.- No.46

        이 논문은 이상의 시에서 불완전한 주체가 끊임없이 탈주하며 불안해하는 근본적인 원인을 살펴보았다. 많은 연구자들이 이상의 시를 현대적인 것에 대한 무한한 동경으로 이해한다. 한국문학사는 그를 미래의 시인, 혹은 종잡을 수 없는 난해한 시를 쓴 시인으로 기록한다. 하지만 그 근거로 제시할 만한 것들이 이상의 시에는 그렇게 많지 않다. 실제로 이상은 끊임없이 현재로부터 탈주하고, 자신의 삶으로부터 자신을 분리하고자 했다. 그것은 결여로서의 세계, 말하자면 불가능한 현실 속에서 어떤 가능성을 찾는 일이었다. 이상의 시에서 불가능한 가능성은 끊임없이 그것에 대해 질문하는 주체의 아이러니를 통해 드러난다. 진리를 향해 걸어갔던 이상은 어떠한 위로의 말도 귀담아듣지 않았으며, 철저하게 현실과 타협하지 않았다. 그러한 이상이 자신의 삶을 소비하면서 지킬 수 있었던 윤리란 민족의 운명과 함께 할 만큼 거창한 것은 아니었다. 그러나 그것은 그 시대의 모든 불가능한 것들에 대한 가능성으로서 한 개인의 특별한 모험의 형식이기 때문에 매우 문제적이다. This article looks around the fundamental cause what makes incomplete subject to be anxious in Yi Sang"s Poetry. Many of researchers think that Yi Sang"s Poetry is an infinite longing for modernism or modernity. Also history of Korean literature praises him as a future poet, or devaluates him who composes an esoteric poems. However, there is not much to provide reasonable evidence for modernism or modernity in Yi Sang"s Poetry. Actually Yi Sang tried to escape from the present and separated himself from his life of distress. Those are finding a possibility in impossible reality which is a world of lack. Such as impossible possibility is exposed come out ironical behavior of subject who constantly question about that. Yi Sang is walking to truth alone, so that he did not bow down his ears to words of comfort. And he did not comprise with the reality. Yi Sang stuck to his last to consume his life because he think it is ethics. It is not so great that the ethics casts in its fortunes with nation. But the ethics is a possibility of all impossible, because it is a special form which run the risk of fortunes. Therefore it is almost problematic.

      • KCI우수등재

        자연공원 이용행태 및 만족도 평가 : 마이산 도입공원을 중심으로 The Case of Mt . Mai Provincial Park

        노재현,김세천,허준 한국관광학회 1998 관광학연구 Vol.21 No.2

        Through the quantitative analysis of users' behaviors and post occupancy evaluation to the actual conditions of management, authors in this paper purport that they could provide policy suggestions for the management priority of Provincial Park Administration. The study area is Mt. Mai Provincial Park at Chon-buk Province. The results of satisfaction with the facilities were found generally low but that of landscape were high. Density of forest and diversity of plants were found as main explicatory variables having negative effects on the satisfaction level for the plants. The major variables in the satisfaction levels with vegetation management were the proper amount of plants, harmony of plants.

      • KCI등재

        Концепция интегрального словаря в русской лексикографии

        Чо Нам-Син(Cho Nam-Shin) 한국슬라브어학회 2010 슬라브어연구 Vol.15 No.1

        The basic of the modern lexicography is the presentation of systemic characteristics of lexicon. The theoretical and practical aspects of compiling dictionary explaining the lexicon of a language as fairly well-organized system is called systemic lexicography. The systemic lexicography has already been well developed by Ju.D. Apresjan in a series of research papers. Therefore in the present work only the main concept of integral dictionary is briefly mentioned. The integral description of a language supposes that dictionary and grammar be harmonized with each other in the type of information which is contained in them and in the way of describing them. In this case dictionary and grammar are able to have influence on each other in a uniform linguistic model. This universal analysis of lexeme shows the complexity of lexicographical description and makes a basis for integral dictionary.

      • SCISCIESCOPUS
      • VLSI를 위한 연속시간의 MOSFET-C Wien-Bridge 발진회로 설계

        李鍾寅,申奎宰 群山大學校自然科學硏究所 1988 自然科學硏究 Vol.3 No.-

        The improved Wien-Bridge oscillator circuits consisting of a new MOSFET-Capacitor gain amplifier is proposed. The performance of improved oscillator has tested using characteristics equation and open-loop measurement. The resulting circuit has been extended the range of operation of the oscillator. The new circuits can be fully integrated.

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