설측브라켓 부착시 위치오차에 관한 연구

최준규,황현식 전남대학교 치과대학 1996 전남치대논문집 Vol.8 No.1

The purpose of this study was to evaluate the positioning errors according to the method of bonding lingual brackets. Dental models of twenty orthodontic patients with malocclusion were selected for this study. The positioning errors were measured on each model that brackets were bonded to . Three different bonding methods were used. For the first method, the bracket was bonded intimately to the lingual surface of the model. For the second method, the bracket was bonded intimately to the lingual surface after setting up using articulator. The passive bracketing, bonding the bracket ligated first to ideal archwire, was used after setting up as the last method. The results were as follows : 1. The brackets bonded without setting up showed greater angulation errors in the upper 1st premolar and the lower canine than those in other bonding methods. The brackets bonded without passive bracketing showed greater positioning errors in upper central incisor, lower 1st and 2nd premolars. 2. The brackets bonded without setting up showed greater torque error in lower 2nd premolar than those in other bonding methods. The brackets bonded without passive bracketing showed greater torque errors in all upper teeth, lower 1st and 2nd premolars. 3. The brackets bonded without passive bracketing showed greater rotation errors between upper central incisors, lower central incisors, lower lateral and central incisor, lower canine and lateral incisor. 4. The brackets bonded without setting up showed greater in-out errors between upper canine and lateral incisor than those in other bonding methods. The brackets bonded without passive bracketing showed greater in-out errors between upper central incisors, upper central and lateral incisors, upper 1st and 2nd premolars, lower lateral and central incisors, lower canine and lateral incisor. These results suggest that there is a large amount of positioning error in lingual brackets even by an indirect bonding technique, and it may be reduced by passive bracketing.

서울 올림픽 이후의 사회체육발전과정

최충식,오준석 龍仁大學校 1990 용인대학교 논문집 Vol.6 No.-

The aim of this paper is to provide some suggestions for the development of sport for all movement in Korea by reviewing and analyzing the progress in Korean sport for all movement after the Seoul Olympic Games. With a big social change toward true democracy and human welfare, particularly after the Seoul Olympic, the field of sport in Korea has been challenged by a major issue, the promotion of sport for all movement. Since Korea is in her early stage of sport for all movement and has to prepare for the happy sport life of the people in the 21th century with sound body and sound mind, it is required to establish a long term master plan to execute the enhancement policy of national sport and physical education. The following suggestions should be included in the government sport policies which sum up the several tasks derived from the progress in Korean sport for all movement since the 1988 Seoul Olympic Games. 1. The Government philosophy of national sports promotion should lie in the three step goal of individual health, social health, and strengthening of national power. 2. The government should provide systematic and financial organizations to enable the Korea Amateur Sports Association and her affiliated federations to execute the promotion of the national sport for all successfully. 3. To ensure finance for national sport promotion, the finance of sport for all movement in the Ministry of Sport and several sources of financial income should be secured. 4. To secure public sport facilities, government, provincial and city office, and its lower official units(community office) should take charge of the finance for sport facilities according to its capacity. And existing sport facilities should be open to the public for sport for all purpose. 5. Asystematic and political reinforcement to employ sport leaders for community sport facilities should be done. And for the activitization. of sport for all and development of programs the institute of sport for all should be organized obligatorily in every Do-province and city.

作形에 따른 土壤 微小節肢動物의 分布에 關한 硏究

崔星植,郭晙洙 圓光大學校 1984 論文集 Vol.18 No.2

土壤中에는 여러 가지 動物群이 棲息하고 있으며 특히 土壤 微小節肢動物은 그 數나 種이 매우 多樣하고 腐植을 포함한 有機物을 分解하여 土壤의 理化學的 性質을 變化시키므로 種生과 動物相에 影響을 미쳐 土壤生態界의 均衡을 維持하는데 중요한 役割을 하고 있다. 이들은 自然的, 人爲的 諸要因에 의해서 영향을 받으며 특히 腐植을 포함한 土壤表層의 狀態와 가장 關係가 큰 것으로 알려져 있다. 따라서 耕作形態와 植生을 달리하는 地域에서 土壤에 棲息하는 微小節肢動物의 分布狀態를 調査하기 위하여 森林 및 竹林 等의 非耕作地와 果樹園, 桑田 및 牧草地, 人蔘圃 및 園藝團地 等의 非永年作物 栽培地를 대상으로 本 硏究를 實施하여 다음과 같은 結果를 얻었다. 1. 調査期間中 採集된 土壤動物은 總 8, 083個體로서 Acarina가 57.2%, Collembola가 29.3%였다. 2. Acarina의 群集造成은 Cryptostigmatark 74.4%로 가장 많고, Mesostigmata, Prostigmata의 順이었다. 3. Cryptostigmata의 分布를 보면 森林에서 45種(827個體), 竹林42(637), 果樹園34(606), 牧草地 20)(516), 田作地 27(395), 人蔘圃 13(225), 園藝團地 18(148), 桑田 11(88) 等으로 個體數/種數 比率의 非耕作地에 비해 耕作地에서 높은 것으로 나타났다. 4. Cryptostigmata 중 Epilohmannia pallida pacifica A., Tectocepheus velatus M., Scheloribates laevigatus K., S. latipes K., Protoribates lophotricus B., Protoribates monodactylus H. 等의 6種은 全 調査區에서 採集되어 廣範圍한 分布를 보였다. 5. 垂直的分布는 63.8%가 地表下 0-5cm 層에 分布되어 있었으며 5~10cm 層에 26.7%, 10~15cm層에는 9.5%이었다. 6. 土壤 微小節肢動物의 個體數는 有機物과의 사이에서만 垂直的 季節的 分布에 있어서 5% 內에서의 有意性이 認定되었다. This study was carried out to investigate how cultivation affects both the variety of species and the density of soil micro-arthropods. To fulfil this purpose, smples were taken from uncultivated areas such as a forest and a bamboo forest as well as diversely cultivated areas such as a orchard, a pasture, a cultivated upland, a giseng field, a horticultural field, and a mulberry field in Jeonbug Province, South Korea from May, 1981 to February, 1982. The outcome of the study was as follows : 1. Among 8,083 individual number of microarthropods collected, 57.2% were Acarina and 29.3% were Collembola. 2. Acarina consisted of Cryptostigmata (74.4%), Mesostigmata, and Prostigmata. 3. The distribution of cryptostigmata was as follows : Forest-45 species/827 individuals ; Bamboo forest-42sp. /637 indv.; Orchard-34 sp./ 606 indv. ; Pasture-20 sp./516 indv.; Cultivated upland-27 sp./395 indv.; Ginseng field-18sp./148indv.; Mulberry field-11 sp./88indv. The individual numbers/species numbers ratio of Cryptostigmata was higher in cultivated lands. There was more species variety with a small number of individuals in uncultivated lands, but less species variety with a larger number of individuals in cultivated lands. 4. 6-species of Cryptostigmata were found in all study area : Epilohmannia pallida pacifica A., Tectocepheus velatus M., Scheloribates laevigatus K., S. latipes K., Protoribates lophotricus B., Protoribates monodactylus H. 5. The vertical distribution of soil micro-arthropods was as follows : 0-5cm subsoil-approximately 63.8%, 5-10cm subsoil-approximately 26.7%, 10-15cm subsoil-approximately 9.5%. 6. Seasonal density fluctuation of soil micro-arthropods was low in spring, highest in fall, and decrease to winter. 7. In both seasonal density fluctuation and vertical distribution, a positive correlation and difference were observed between organic materials and total individual numbers of micro-arthropods. This was also true in the case of Cryptostigmata.

방사형기저함수망을 이용한 열간 사상압연의 압연하중 예측에 관한 연구

손준식,이덕만,김일수,최승갑 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-

A major concern at present is the simultaneous control of transverse thickness profile and flatness in the finishing stages of hot rolling process. The mathematical modeling of hot rolling process has long been recognized to be a desirable approach to investigate rolling operating practice and the design of mill equipment to improve productivity and quality. However, many factors make the mathematical analysis of the rolling process very complex and time-consuming. In order to overcome these problems and to obtain an accurate rolling force, the predicted model of rolling force using neural networks has widely been employed. In this paper, Radial Basis Function Network(RBFN) is applied to improve the accuracy of rolling force prediction in hot rolling mill. In order to verify and analysis the performance of applied neural network, the comparison with the measured rolling force and the predicted results using two different neural networks - RBFN, MLP, has respectively been carried out. The results obtained using RBFN neural network are much more accurate those obtained the MLP.

On-line 학습 신경회로망을 이용한 열간 압연하중 예측

손준식,이덕만,김일수,최승갑 한국공작기계학회 2005 한국생산제조학회지 Vol.14 No.1

In the face of global competition, the requirements for the continuously increasing productivity, flexibility and quality(dimensional accuracy, mechanical properties and surface properties) have imposed a major change on steel manufacturing industries. Indeed, one of the keys to achieve this goal is the automation of the steel-making process using AI(Artificial Intelligence) techniques. The automation of hot rolling process requires the developments of several mathematical models for simulation and quantitative description of the industrial operations involved. In this paper, an on-line training neural network for both long-term learning and short-term learning was developed in order to improve the prediction of rolling force in hot rolling mill. This analysis shows that the predicted rolling force is very closed to the actual rolling force, and the thickness error of the strip is considerably reduced.

On-line 학습 신경회로망을 이용한 열간 압연하중 예측

손준식,이덕만,김일수,최숭갑 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-

In the face of global competition, the requirements for the continuously increasing productivity, flexibility and quality(dimensional accuracy, mechanical properties and surface properties) have imposed a major change on steel manufacturing industries. Indeed, one of the keys to achieve this goal is the automation of the steel-making process using AI(Artificial Intelligence) techniques. The automation of hot rolling process requires the developments of several mathematical models for simulation and quantitative description of the industrial operations involved. In this paper, a on-line training neural network for both long-term learning and short-term learning was developed in order to improve the prediction of rolling force in hot rolling mill. This analysis shows that the predicted rolling force is very closed to the actual rolling force, and the thickness error of the strip is considerably reduced.

방사형기저함수망을 이용한 열간 사상압연의 압연하중 예측에 관한 연구

손준식,이덕만,김일수,최승갑 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.6

A major concern at present is the simultaneous control of transverse thickness profile and flatness in the finishing stages of hot rolling process. The mathematical modeling of hot rolling process has long been recognized to be a desirable approach to investigate rolling operating practice and the design of mill equipment to improve productivity and quality. However, many factors make the mathematical analysis of the rolling process very complex and time-consuming. In order to overcome these problems and to obtain an accurate rolling force, the predicted model of rolling force using neural networks has widely been employed. In this paper, Radial Basis Function Network(RBFN) is applied to improve the accuracy of rolling force prediction in hot rolling mill. In order to verify and analyze the performance of applied neural network, the comparison with the measured rolling force and the predicted results using two different neural networks-RBFN, MLP, has respectively been carried out. The results obtained using RBFN neural network are much more accurate those obtained the MLP.

배추 시스테인 단백질 분해 효소 억제 유전자 BCPI-1의 발현과 종자 발아 및 유묘 생장과의 연관성

홍준기,이은영,김정률,양경애,최영주,정우식,김호일,윤대진,이상열,조무제,임체오 Plant molecular biology and biotechnology research 2003 Plant molecular biology and biotechnology research Vol.2003 No.-

Phytocystatins are protein inhibitors of cysteine proteinases of the papain family that have been identified in both monocot and dicot plants. A cDNA encoding a phytocystatin, BCPI-1 (Brassica Cysteine Proteinase Inhibitor-1) has been isolated from Chinese cabbage (Brassica campestris L. ssp. pekinensis) flower buds. Here, we tested whether BCPI-1 transcription is regulated by hormones, and could be involved in regulating cysteine proteinases during and after germination. BCPI-1 was sensitive to exogenous GA_(3) and ABA, which are important factors controlling seed germination, suggesting that the expression of BCPI-1 is hormonally regulated. We introduced a recombinant plasmid containing the full-length BCPI-1 cDNA under the control of cauliflower mosaic virus 35S promoter into rice embryogenic calli using the particle delivery method, and regenerated a number of transgenic rice plants. Constitutively over-expressed BCPI-1 caused changes in overall plant growth and development, including reduced germination and seedling growth. These data support the role of the BCPI-1 in the regulation of endogenous proteinases during both seed germination and subsequent seedling development. Phylocystatins은 papain계열의 cysteine 단백질 분해 효소 활성을 특이적으로 억제하는 억제자로 다양한 식물 종으로부터 분리되었다. 본고에서는, 배추 화아 cDNA library로부터 분리된 phytocystatin인 BCPI-1(Brassica Cysteine Proteinase Inhibitor-1)의 생체 내 기능에 대해 연구하였다. 먼저, BCPI-1 전사체는 발아 조절에 중요한 영향을 미치는 GA₃와 ABA에 의해 예민하게 증가, 혹은 감소되는 반응을 보임으로써, BCPI-1이 식물 호르몬의 영향을 받으며, 특히 발아나 유묘의 생장 조절에 관련이 있음을 알 수 있었다. Particle bombardment 방법을 통하여 BCPI-1을 벼의 배 형성 세포 내에 도입, 재분화 시켜 형질 전환 벼를 생성하였다. CaMV 35S promoter의 조절에 의해 지속적인 BCPI-1 발현을 보이는 형질 전환 벼의 경우, 발아와 유묘 생장이 현저히 지연되었다. 위의 결과들을 바탕으로, BCPI-1이 식물체 내에서 생성되는 cysteine 계열의 단밸질 분해 효소 활성을 조절하여 종자의 발아와 유묘의 생장에 영향을 미치는 것으로 추측한다.

연속냉간압연의 두께제어 모델 개발에 관한 연구

손준식,김일수,권욱현,최승갑,박철재,이덕만 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.5

The quality requirements for thickness accuracy in cold rolling continue to become more stringent, particularly in response to exacting design specification from automotive customers. One of the major impacts from the tighter tolerance level is more unusable product on the head end and tail end of tandem mill coils when the mill is in transition to or from steady state rolling condition. A strip thickness control system for a tandem cold steel rolling mills is composed with blocked non-interacting controller and controllers for strip thickness and tension control of each rolling stands. An intelligent mathematical model included an elastic deformation of strip has been developed and applied to the field in order to predict the rolling force. The simulated results showed that the effect of elastic recovery should be included the model, even if the effect of elastic compression was not important.

저열량영양식품 섭취에 따른 비만여성의 체중감량 효과에 관한 연구

박순영,최중명,김동현,최경식,최봉근,윤태영,유동준 한국보건통계학회 2002 보건정보통계학회지 Vol.27 No.1

In the method of obesity treatment, Dietary method, Exercise method, Behavior method, and Drug method, Dietary method is the most important control method of obesity. The aim of this study is that evaluate the weight reduction effect of the specific low calorie diet products (KSD I and 2) in obese women. Twenty five women who were volunteer participated in this study. They have no heart diseases and metabolic diseases. we classified two groups : obese group and standard group. Anthropometric indices were measured in all subject for four times. Venous blood sample were taken to determine the lipid profiles, glucose level, and liver function test. In obese group, body weight were reduced 2.85±1.46kg, but showed statistically non-signicicant. Body mass index were gradually reduced, 1.09±0.93kg/m^2(p<0.05).In blood analyses, total cholesterol were reduced 10.61 ±33.4mg/dℓ ( p<0.05). KSD 2 significantly inhibited maltase, sucrase and α-glucosidase from rat intestine, and porcine pancreatic lipase, although KSD I inhibited only the sucrase.