電氣刺戟 處理時間이 赤丸20일 무의 收量形質 및 可食部內 $NO_3^-$含量에 미치는 影響

권오달 한국유기농업학회 2002 韓國有機農業學會誌 Vol.10 No.1

電氣刺戟의 處理時間이 赤丸20일 무의 收量形質과 可食部 內 窒酸含量에 미치는 영향을 조사하기 위하며 실험한 결과는 다음과 같다. 1. 電氣刺戟 2시간처리가 葉長生長과 根徑肥大를 촉진시키는데 효과적이었으며, 'Comet'와 'Sakuranbo'의 根徑은 무처리구에서 보다 각각 14.7%와 12.8% 증가하였다. 2. 根生體重에서 'Comet'는 2시간구가, 'Sakuran'는 8시간구가 가장 높았고, 이것은 무처리구 보다 각각 39%이상 높은 것이었다. 3. 모든 電氣처리구의 뿌리 내 질酸含量은 무처리구 보다 높았다. 그리고 뿌리의 窒酸含量은 根徑, 機重, 그리고 總重量과도 높은 正의 相關關係를 가고 있는 것으로 나타났다. The results of the experiment about the effect of the length of electrical stimulation treatment time on the yield components and NO$_3$ content in edible parts of 2 cherry type radishes(Raphanus salivas L.) were like followings. 1. The 2 hours electrical stimulation promoted the length of leaf and the enlargement of the root diameter of 'Comet' and 'Sakuranbo' cultivars, and their root diameters were increased by 14.7% and 12.8% respectively than that of the control. 2, The plot which showed the highest root fresh weight was the 2 hours stimulation plot in 'Comet' and 8 hours stimulation plot in 'Sakuranbo', and these results were approximately 39% higher than that of the control. 3. All of the electrically stimulated plots of 'Comet' and 'Sakuranbo' showed higher NO$^{[-10]}$ $_3$content in roots than the control. And the amount of NO$^{[-10]}$ 3 in their roots showed a remarkable positive correlation with the root diameter, the root fresh weight and the total fresh weight.

컴퓨터 비젼 및 패턴인식기법을 이용한 공구상태 판정시스템 개발

권오달,양민양 대한기계학회 1993 대한기계학회논문집 Vol.17 No.1

본 연구에서는 공구의 파손 및 마멸량을 검출할 수 있는 시스템을 구축하고자 하였다. CCD(charge coupled device)카메라를 통해 공구형상의 영상을 얻고 이를 PC 로 분석하는 영상처리 기법과, 여기서 계산된 정보를 이용하여 패턴인식 기법으로 공 구의 상태를 판정하는 알고리즘을 개발하였다. In unmanned machining, One of the most essential issue is the tool management system which includes controlling. identification, presetting and monitoring of cutting tools. Especially the monitoring of tool wear and fracture may be the heart of the system. In this study a computer vision based tool monitoring system is developed. Also an algorithm which can determine the tool condition using this system is presented. In order to enhance practical adaptability the vision system through which two modes of images are taken is located over the rake face of a tool insert. And they are analysed quantitatively and qualitatively with image processing technique. In fact the morphologies of tool fracture or wear are occurred so variously that it is difficult to predict them. For the purpose of this problem the pattern recognition is introduced to classify the modes of the tool such as fracture, crater, chipping and flank wear. The experimental results performed in the CNC turning machine have proved the effectiveness of the proposed system.

種實用 강낭콩 品種의 特性比較 및 收量構成要素에 關한 硏究

權五達,李政明 경희대학교 부설 식량자원개발연구소 1987 硏究論文集 Vol.8 No.-

Thirty six cultivars and 39 lines of field bean (Phaseolus vulgmis L.) were grown at 3 different locations to, compare the plant characteristics and seed yield and several yield components which can be directly related to the economical yield. Among the cultivars and lines tested, Peru 34, Poriosentetico, Suchitan, Turialba, and Emp. 83 were found to be very late-maturing and high yielding with higher seed wt. increase per day per square meter. Seed yield of some early maturing cultivars and lines, such as Limeiight, Goiano, and Wis (RRR)-777, was very low. The maturity, or days required to pod maturity, of field beans was found to be positively correlated with days to flowering and duration of pod maturity. Daily increment of seed weight was more influenced by the days to the first flowering rater than days to maturity. Days required to the first flowering varied greatly depending upon cultivars and lines with a range of 28.3 to 56.1 days. Days to pod maturity showed greater variations than other parameters, ranging from 7.0 to 26.7 days. Wide variations in seed and plant characteristics, days to maturity, economical and biological yield, and others, were found among tested field beans, which could be utilized for the improvement of cultivars in Korea through effective selection and/or as donors of useful germplasm.

한국인 분리 Actinobacillus actinomycetemcomitans균주의 체형 및 혈청형에 관한 연구

권오달,권배근,신형식,Kwon, Oh-Dal,Kwon, Bae-Keun,Shin, Hyung-Shik 대한치주과학회 1990 Journal of Periodontal & Implant Science Vol.20 No.1

施肥水準이 강남콩의 生育, 莢收量 및 根瘤形成에 미치는 影響

權五達,李政明 慶熙大學校 1984 論文集 Vol.13 No.-

This experiment was conducted to investigate the effect of varying levels of fertilizer on the growth, pod yield, and root nodule development in pet-grown snapbean cultivars. Early flowering rate was low in 'Pinto' and 'White Half Runner' and also reduced by increased level of fertilizers in most cultivars. However, fertilizer levels did not appear to have any particular pattern on pod yield distribution among 3 harvest dates. Total pod yield and pod number per plant were high in 'White Half Runner' and 'Pinto' and in 2g/pot/week (N:P_2O_5:K_2O=17:21:17) fertilized plants even though cultivars showed different response to fertilizer levels. Shoot growth was high in 2g-fertilized plants and in 'Stringless Green pod' cultivar, which showed the lowest pod yield and the lowest green pod productivity (pod to shoot ratio). The formation of root nodules was significantly reduced by fertilizer application and also influenced by cultivars.

컴퓨터 비젼 및 자동촛점장치를 이용한 크레이터 마멸 측정 ( Crater Wear Measurement Using Computer Vision and Automatic Focusing )

권오달,양민양 대한기계학회 1995 대한기계학회 춘추학술대회 Vol.- No.-

인체 치은섬유모세포에서 Lipopolysaccharides, Ursolic acid와 Oleanolic acid에 의한 Phenytoin 유도 세포활성에 미치는 영향

권오달,신형식 원광대학교 치의학연구소 1994 圓光齒醫學 Vol.4 No.1

Gingiva hyperplasia is frequently associated with the long-term use of phenytoin for control of convulsive disorders. The purpose of this study was to investigate on the effects of lipopolysaccharides(LPS), ursolic acid and oleanolic acid to phenytoin-induced cell activity in human gingival fibroblast. Human gingival fibroblasts were cultured from the healthy gingiva of orthodontic patients. Gingival fibroblasts were trypsinized and transferred to the wells of microtest plates. Fibroblast were cultured in growth medium added 5㎍/㎖ of phenytoin, 5㎍/㎖ of LPS, 10^-7M of ursolic acid and oleanolic acid. The passage number of cultured fibroblasts were between fifth and eighth. Cell morphology was examined by inverted microscope and the cell activity was measured by proliferation assay. t?rsolic acid significantly modulated cell morphology into globular shape at the concentration of 10^-7M in the presence of phenytoin and LPS, and the cell activity was significantly decreased by ursolic acid or oleanolic acid regardless of the presence of phenytoin and LPS. These results suggested that the increased phenytoin-induced cell activity might be modulated by ursolic acid or oleanolic acid. Further study in needed to clarify their toxicological effects on cellular modulation and mRNA expression change.

施肥水準이 강남콩의 生育, 莢收量 및 根瘤形成에 미치는 影響

權五達,李政明 경희대학교 부설 식량자원개발연구소 1984 硏究論文集 Vol.5 No.-

This experiment was conducted to investigate the effect of varying levels of fertilizer on the growth, pod yield, and root nodule development in pot-grown snapbean cultivars. Early flowering rate was low in 'Pinto' and 'White Half Runner' and also reduced by increased level of fertilizers in most cultivars. However, fertilizer levels did not appear to have any particular pattern of pod yield distribution among 3 harvest dates. Total pod yield and pod number per plant were high in 'White Half Runner' and 'Pinto' and in 2g/pot/week (N:P_(2)O_(5):K_(2)O=17:21:17) fertilized plants even though cultivars showed different response to fertilizer levels. Shoot growth was high in 2g-fertilized plants and in 'Stringless Green Pod' cultivar, which showed the lowest pod yield and the lowest green pod productivity (pod to shoot ratio). The formation of root nodules was significantly reduced by fertilizer application and also influenced by cultivars.

인체 치은섬유모세포에서 Lipopolysaccharides, Ursolic acid와 Oleanolic acid에 의한 Phenytoin 유도 세포활성에 미치는 영향

권오달,김윤성,신형식,Kwon, Oh-Dal,Kim, Yoon-Sung,Shin, Hyung-Shik 대한치주과학회 1994 Journal of Periodontal & Implant Science Vol.24 No.1

Gingival hyperplasia is frequently associated with the long-term use of phenytoin for control of convulsive disorder. The purpose of this study was to investigate on the effects of lipopolysaccharides (LPS), ursolic acid and oleanolic acid to phenytoin-induced cell activity in human gingival fibroblast. Human gingival fibroblasts were cultured form the healthy gingiva of orthodontic patients. Gingival fibroblasts were trypsinized and transferred to the weels of microtest plates. Fibroblast were cultured in growth medium added $5{\mu}g/ml$ of phenytoin, $5{\mu}g/ml$ of LPS, $10^{-7}M$ of ursolic acid and oleanolic acid. The passage number of cultured fibroblasts were fifth and eight. Cell morphology was examined by inverted microscope and the cell activity was measured by proliferation assay. Ursolic acid significantly modulated cell morphology into globular shape at the concentrantion of $10^{-7}M$ in the presence of phenytoin and LPS, and the cell activity was significantl decreased by ursolic acid or oleanolic acid regardless of the presence of phenytoin and LPS. These results suggested that the increased phenytoin-induced cell activity might be modulated by ursolic acid regardless of the presence of phenytoin and LPS. These results suggested that the increased phenytoin-induced cell activity might be modulated by ursolic acid or oleanolic acid. Further study is needed to clarify their toxicological effects on cellular modulation and mRNA expression change.

상치의 시비조건에 따른 상치내 몇 가지 미량원소의 함량에 관한 연구

권오달,정근희,이진희 한국유기농업학회 1998 韓國有機農業學會誌 Vol.7 No.1