• 고려인삼학회:학술대회논문집
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• 고려인삼학회 1988년도 학술대회지
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• pp.151-155
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• 1988

인삼사포닌, 프로토파낙사다이옥 사포닌 및 푸로토파낙사트리올 사포닌의 몰핀내성 및 의존성 형성억제 작용을 연구하였다. 인삼사포닌은 독성이 10배, 진통력은 1/2인 morphinone으로 대사시키는 morphine 6-hydrogenase의 작용을 억제시켜 morphinone의 생성을 증가시켜 morphine glutathione conjugation을 촉진시키므로 morphinone의 해독작용이 증가된다. 또한 인삼은 척수하행성 억제계의 활성을 억제하여 몰핀의 진통력을 길항하므로 신경계 기능상의 변화도 몰핀의 내성 및 의존성형성 억제작용에 관여하는 것으로 추정된다.

• 한국농림기상학회지
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• 제8권2호
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• pp.107-115
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• 2006

오염물질에 노출된 수목에서 잎의 발달 단계와 항산화 기능의 관계를 구명하기 위하여, 1월부터 6월까지 색소 함량과 항산화 활성의 변화를 조사하였다. 폐광지역과 공단지역내 수목의 스트레스에 대한 항산화 기능은 잎 발달과 함께 변화하며, 6월에 가장 높은 항산화 활성을 나타내었다. 항산화 물질 중 계절 변화와 상관을 나타내는 것은 카로테노이드, SOD 및 CAT였으나, 카로테노이드와 SOD는 정(+)의 상관을 나타냈고, CAT는 부(-)의 상관을 보였다. 또한 $H_{2}O_{2}$,를 제거하는 데 관여하는 APX와 CAT는 상호 보완적인 관계를 나타냈다. 가장 낮은 항산화 활성을 나타내는 시기는 4월이었으며, 이 시기에는 스트레스로 인해 피해 수준도 낮았다.

• 제어로봇시스템학회논문지
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• 제20권2호
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• pp.120-125
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• 2014

Conventional handheld metal detectors use a single induction coil to detect the metallic parts of explosive objects, and the detector generates an acoustic signal from its magnetic response to a metallic object so that an operator can confirm the existence of mines. Though metal detectors have very useful detection mechanisms to find mines, it is easy to cause a high false alarm ratio due to the detection of non-explosive metallic items such as cans, nails and other pieces of metal, etc. Also, because of the physical characteristic of a metal detector it is hard to detect non-metallic objects such as mines made of wood or plastic. Furthermore, the operator must move it to the left and right slowly and repeatedly to attain enough sensor signals to confirm the existence of mines using only a monotonous acoustic signal. To resolve the disadvantages of handheld detectors, many new approaches have been attempted, such as an arrayed detector and a visualization algorithm based on metal/non-metal sensor. In this paper, we introduce a visualization algorithm with a metal/non-metal complex sensor, an arrayed metal/non-metal sensor and the their testing and evaluation.

• 대한기계학회논문집A
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• 제24권1호
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• pp.182-189
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• 2000

This paper presents the real time control method of 5-axis NC machine for high precision and productivity based on the curvature theory, of a ruled surface. The trajectory, of NC machine is described by, way of a ruled surface generated by the points on part surface and tool axis direction vector. The curvature theory, of a ruled surface is then applied to deter-mine the motion parameters of the 5-axis machine for control. The controller computes position, orientation, and differential motion parameters of the tool in each sampling period. The real-time approach produces smoother surfaces and requires substantially less machining time compared to conventional off-line approaches. The propose real-time control method based of the curvature theory of a ruled surface may give new methodology of precision 5-axis machine control.

• 한국의류학회지
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• 제25권4호
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• pp.707-718
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• 2001

The purpose of this study is to evaluate a newly developed protective suit with the fragments of grenade. The protection efficiency should be strengthened upon the degree of wound. The fragment weight of the used grenade was measured and the kinetic energy of the maximum speed of the fragments in the field test was 137.7J and this could be the protective efficiency test by the multitude fragments in less than 0.031g of the M16A1. The panel inserted to the new demining suit has protection rate of 100% within the distance of 1m and sample II has protection rate of 100% only beyond the distance of 5m. The test showed that the protection rate on the protective suit of the existing garment was comparatively high, however, the protection rate of the sleeve part was very low. The new demining suit through the research demand some complementary measures to lower the temperatures in ear, average skin temperatures, and the temperatures-humidity inside the clothing for summer climate condition, It showed that 30 minutes of rest on the clothing was difficult to go back to the original condition. But in winter climate condition, there was no problem in the temperature, humidity, and comfort to go back to the original condition during the rest and was better in warmth.

• 한국작물학회지
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• 제50권5호
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• pp.319-324
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• 2005

This study was conducted to identify the soluble carbohydrates in soybean seeds using on-line HPLC-RID-ES/MS and HPLC behavior, and to deter­mine their contents for high quality soybean breeding. The monosaccharide (glucose) and three oligosaccharides (sucrose, raffinose, and stachyose) were identified in Korean soybeans by their chromatographic behavior and results of on-line HPLC-RID-MS with Electro­spray Ionization mode. On the basis of HPLC with a RID detector, the 32 Korean major soybeans contain $0.37{\pm}0.26\%$ glucose, $4.55{\pm}0.91\%$ sucrose, $1.19{\pm}0.19\%$ raffinose, and $2.72{\pm}0.37\%$ stachyose on a dry basis. In 468 soybean germplasms, the ranges of glucose, sucrose, raffinose, and stachyose were $0.03 - 0.98\%$, $2.33 - 6.96\%$, $0.08 -1.87\%$ and $0.75 - 3.18\%$, respectively. Among 500 soybean samples, oligosaccharide contents of 32 Korean major cultivated soybeans and 468 soybean germplasms were varied $5.83 - 10.06\%$ and $3.66 - 10.32\%$, respectively. The composition of glucose, sucrose, raffinose, and stachyose in soluble carbo­hydrates of 500 soybean samples were $2.07 {\pm} 1.75\%$, $58.01{\pm}5.82\%$, $10.13{\pm}2.28\%$ and $29.80{\pm}4.54\%$, respectively. Sucrose appeared to be most prevalent in soy­bean soluble carbohydrates.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.653-655
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• 2005

More than 70 percent of terrestrial territory of Korea is mountainous areas where degradation becomes serious year by year due to illegal tombs, expanding golf courses and stone mine development. We elaborate the potential usage of high resolution image for the monitoring of the phenomena. We made the classification of tombs and the statistical radiometric characteristics of graves were identified from this project. The graves could be classified to 4 groups from the field survey. As compared with grouping data after clustering and discriminant analysis, the two results coincided with each other. Object-oriented classification algorithm for feature extraction was theoretically researched in this project. And we did a pilot project, which was performed with mixed methods. That is, the conventional methods such as unsupervised and supervised classification were mixed up with the new method for feature extraction, object-oriented classification method. This methodology showed about $60\%$ classification accuracy for extracting tombs from satellite imagery. The extraction of tombs' geographical coordinates and graves themselves from satellite image was performed in this project. The stone mines and golf courses are extracted by NDVI and GVI. The accuracy of classification was around 89 percent. The location accuracy showed extraction of tombs from one-meter resolution image is cheaper and quicker way than GPS method. Finally we interviewed local government officers and made analyses on the current situation of mountainous area management and potential usage of KOMPSAT-II images. Based on the requirement analysis, we developed software, which is to management and monitoring system for mountainous area for local government.

• 한국정밀공학회지
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• 제22권1호
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• pp.53-60
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• 2005

The wire rope of container crane is a important component to container transfer system and is used in a myriad of various applications such as elevator, mine hoist, construction machinery, and so on. If it happen wire rope failures in operating, it may lead to the safety accident and economic loss, which is productivity decline, competitive decline of container terminal, etc. To solve this problem, we developed the active and portable wire rope fault detecting system. The developed system consists of three parts that are the fault detecting, signal processing, and remote monitoring part. All detected signal has external noise or disturbance according to circumstances. Therefore we applied to discrete wavelet transform to extract a signal from noisy data that was used filter. As experimental result, we can reduce the expense for container terminal because of extension of exchange period of wire rope for container crane and this system is possible to apply in several fields to use wire rope.

• 화약ㆍ발파
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• 제13권4호
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• pp.5-27
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• 1995

본 논문은 '95년 10월 27일 경주 Kolon Hotel에서 제25차 한일 기술사 공동 Symposium에서 발표된 내용이다.

• 한국해양환경ㆍ에너지학회지
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• 제4권4호
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• pp.51-60
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• 2001

최근 들어 해양에 대한 경제적, 환경적, 정치적 관심이 증대함에 따라 다양한 분야에서 해양지리정보에 대한 수요가 발생하고 있으며 이를 위한 지역적인 GIS 연구와 시스템개발, 데이터베이스 구축 등이 진행되고 있다. 그러나 국가차원의 거시적 규모의 해양GIS 체계에 대한 연구는 기존의 육상GIS에 비해 미미하며 따라서, 해양GIS 커뮤니티를 위한 해양지리정보기반의 필요성이 제기되고 있다. 본 논문에서는 해양GIS의 인프라 구축에서 상호호환성과 효율성을 극대화하기 위한 필수조건인 데이터 표준화에 대해 필요성과 특성을 고찰한다. 또한, 기존의 GIS데이터 표준을 분석하여 우리나라 해양GIS 표준과의 연계가능성을 시사하고 해양GIS 데이터 표준의 개념과 구성요소를 정의하며 이를 위한 전략적 개발방안을 제시한다.