• Current Research on Agriculture and Life Sciences
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• 제15권
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• pp.115-122
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• 1997

과채류의 재배에 있어서 접목은 작물의 안정적인 생산과 품질 향상을 위해 없어서는 안되는 기술이다. 그러나 지속적인 숙련 노동력의 감소와 농촌 인구 노령화 등으로 나타나는 노동력 부족 현상은 집목묘의 대량생산 공급에 어려움이 되고 있다. 본 연구에서는 기계접목에 있어서 접목법이 간단하며 접합부자재가 불필요한 삽접법을 이용하는 기계접목 메카니즘 개발의 기초연구를 수행하였다. 트레이상의 육묘상태에서 자동으로 접목하기 위한 기계접목의 기초연구로써 1본씩 수동 공급하는 반자동 기계삽접의 메카니즘 개발에 관한 연구로서 얻어진 결과를 요약하면 다음과 같다. 1. 접합부자재를 사용하지 않고 대부분 과채류에 적용가능한 삽접 기계접목장치의 메카니즘을 구성하였다. 2. 오이를 접수로 하고 신토좌와 흑종을 대목으로 하는 기계접목시험에서 모두 98%의 접목성공율을 나타냈다. 3. 1본 수동 공급에 의한 기계접목 시스템은 10초 정도로 접목 성능은 저조하지만 기계접목 메카니즘의 가능성을 확인하였다.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 2000년도 THE THIRD INTERNATIONAL CONFERENCE ON AGRICULTURAL MACHINERY ENGINEERING. V.II
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• pp.313-317
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• 2000

In this research, a grafting robot with plug in method is used. Plug in method is a method that uses a tapered axis for scion and a tapered hole for stock as processing style of conjugation parts. In the case of handling a grafting seedling, gripping a stem is doing with simple mechanisms of devising to reduce damages to stems. For example, providing cushions between gripper and stem, and fitting a gripper to a stem. Both scions and stocks need cutting, but there is bigger influence for scions than stocks, so problems of cutting scions and special qualities of grippers are necessary to investigate.

• Journal of Periodontal and Implant Science
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• 제31권3호
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• pp.565-571
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• 2001

The purpose of this study is to determine if a relationship exists among osteoporosis, alveolar bone density and periodontal disease in postmenopausal osteoporotic women and postmenopausal healthy women. Twenty-two women were evaluated for this study. They were attending the postmenopausal clinic, Seoul National University Hospital and generally healthy except osteoporosis. They had experienced menopause not less than one year when we began to examine them. Bone densities of lumbar area(L2-L4) was determined by DEXA(LUNAR-expert Co,. U.S.A). We diagnosed osteoporosis when T-score was below -2.5 and healthy state when T-score was over -1. Osteoporotic(10 female), not hormone-treated group and healthy control group(12 female) were asked for their age, menopausal age, menopausal period and the number of remaining teeth and examined clinically for plaque index(PI), gingival index(GI), clinical attachment loss(CAL) on their 6 Ramfjord index teeth. Intraoral radiographs were taken in maxillary anterior zone. All films were equally exposed and developed. Each films was digitized and analysed using image processing software, Scion image. Alveolar bone regions of interest were selected and Intensity of each pixel was quantized in the array ranging from 0(white) to 255(black). The two groups were comparable with respect age, menopausal age, menopausal period and number of remaining teeth. The osteoporotic women had significantly lower alveolar bone density than controls in maxilla. But no significant difference was found with respect clinical attachment loss, plaque index and gingival index. Supported by the Ministry of Public Health and Welfare, Korea (HMP-00-CH-10-0009).