Dense Kondo 계인 CeTe의 광학적 성질

정명화,김재민,권용성 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.1

Dense Kondo계인 CeTe와 정상금속인 LaTe의 크기 양질인 단결정을 개선된 Bridgeman방법으로 성장시켰다. 이 단결정을 이용하여 0.05∼8eV의 광범위한 에너지 영역에서 반사율을 측정하여, Kramers-Kronig변환을 통해 광학전도도를 얻었다. 광학전도도의 스펙트럼을 분석한 결과, CeTe와 LaTe의 경우 모두 p-d 전이에 의한 두 개의 피크가 3.6eV와 5.1eV에서 발견되었다. 이 두 피크의 형성 mechanism은 5d-band의 입방결정장에 의한 것임을 알았다. 그리고 CeTe의 경우는 LaTe에 없었던 4f-5d전이에 의한 피크가 0.4eV에서 발견되었다. 이는 XPS 스펙트럼으로부터 얻은 bare 4f-전자의 binding 에너지(약 1.5eV)에 비해 매우 작은 값이다. 이 편차는 local field를 고려한 Lorentz모델을 적용함으로서 잘 설명되었다. 또한, localization의 정도로 약 0.4의 값을 얻었다. 끝으로, 띠내전이의 해석으로부터 LaTe의 경우보다 CeTe의 경우가 전도전자의 유효질량이 무겁다는 사실을 얻었다. 이것으로부터 CeTe의 여기상태인 Γ_8와 전도전자 간의 Kondo 교환상호작용의 에너지가 매우 크다는 것을 알았다. We had grown the high quality single crystals of dense Kondo system CeTe and normal metal LaTe by using the advanced Bridgeman method. The reflectivities of the single crystals were measured in wide energy range from 0.05 to 8eV, and their optical conductivities were obtained using Kramers-Kronig transformation. By the result of their optical conductivity spectra, two peaks due to p-d transition were discovered at about 3.6 and 5.1eV, respectively. The double peaks were explained by cubic crystalline electric field. And in case of CeTe, extraordinary peak due to f-d transition, which LaTe had not, was appeared around 0.4eV. This value was well explained by the Lorentz model considering the local field. The degree of screening due to conduction electrons was evaluated to be about 0.4. The effective mass of conduction electron of CeTe was large compared with that of LaTe. From this, we could obtain the fact that in CeTe, Kondo exchange energy between conduction electron and excited Γ_8 state was very large

有限變形率 壓密理論에 의한 軟弱 粘土의 一次元 壓密에 관한 數値 解析的 연구

鄭潤和,李明旭,兪南在 江原大學校 産業技術硏究所 1991 産業技術硏究 Vol.11 No.-

A numerical study was performed to investigate characteristics of one-dimensional consolidation of soft clay. Results of consolidation tests with the remolded normally consolidation clay of having a very high initial void ratio were analyzed by using the numerical technique of finite difference method based on the finite strain consolidation theory, to evaluate consolidational characteristics of soft clay under surcharges on the top of clay. On the other hand, a numerical parametric study on soft clay consolidated due to its self-weight was also carried out to find its effect on one-dimensional consolidation. Terzaghi's conventional consolidation theory, finite strain consolidation theories with linear and non-linear interpolation of effective stress-void ratio -permeability realtion were used to analyze the test results and their results were compared to each other to figure out the difference between them.Therefore, the validity of theories was assessed.

건톳 제조에 관한 연구

정창화,오창경,송대진,김수현,오명철 濟州大學校工科大學産業技術硏究所 1999 尖端技術硏究所論文集 Vol.10 No.1

고품질의 건톳제품을 제조할 목적으로 블랜칭 처리조건, 염도, 색도, 톳의 건조조건 등을 연구하였다. 생톳의 최적 블랜칭 조건은 열탕에서 5초간 처리하였고 이때의 염도는 1.8(NaCl%)로 68%의 염분 제거율을 보였다. 건톳 제조의 최적 건조조건은 열풍건조기로 60 에서 2시간 건조시켰을 때이다. 건톳제품의 수분함량은 10%로 조절하였고 색도는 a(-2.61), b(3.58)이었다. For process dried Hizikia fusiforme product of excellent quality, condition of blanching treatment, salinity, color, and dry condition were investigated. The optimum blanching condition of fresh Hizikia fusiforme was 5 seconds at boiling water. Salinity was 1.8(NaCl%), and effect of salinity elimination was 68%. The optimum drying condition was 2 hours at 60℃ in hot-air drying oven. Moisture content of dried Hijizia fusiforme product was control to 10%, Color was a(-2.61), b(3.58).

여름배추 플러그묘 생산에서 품종에 따른 트리아졸계 생장조절 엽면살포 처리효과

강봉화,이정명 경희대학교식량자원개발연구소 2006 硏究論文集 Vol.25 No.-

본 실험에서는 트리아졸계 생장조절제를 이용하여 여름배추의 건묘 육성을 위한 생장조절제의 종류 및 처리 농도를 구명하고, 품종에 따른 반응을 알아보고자 하였다. 저농도 살포처리 시 무처리에 비해 전혀 효과를 보이지 않는 경우도 있었으며, diniconazole 125 mg·L^(-1)의 고농도 처리 시에는 과잉생장억제에 따른 불량묘가 다수 발생하였다. 따라서 건묘 육성에는 diniconazole 25 mg·L^(-1), tebuconazole 125 mg·L^(-1) 처리가 가장 효과적이었으며, diniconazole 처리와 이보다 한 수준 높은 농도의 tebuconazole 처리도 유사한 결과를 보였다. 여름배추 플러그묘에 diniconazole 처리시 12품종 모두 유사하게 반응하였는데, 생육억제 효과는 농도가 높을수록 강하게 나타났다. Diniconazole 125 mg·L^(-1) 처리에서 지나친 억제에 따른 불량묘 발생이 심하여 실용성도 없었을 뿐더러 사용상의 주의가 필요하였고, 건묘 육성에는 본엽 3매시 diniconazole 25 mg·L^(-1) 1회 처리가 바람직하였다. A series of experiments were conducted to investigate effects of triazole bioregulators on growth of summer Chinese cabbage plug seedling. Seedlings sprayed with lower concentrations of triazole bioregulators showed tendency of overgrowth and the seedlings sprayed with diniconazole 125 mg·L^(-1) showed poor quality because of the excessive inhibition or dwarfing of seedlings. In order to produce high quality seedlings of summer Chinese cabbage, spray treatments of diniconazole 25 mg·L^(-1) or tebuconazole 125 mg·L^(-1) were most effective. When compared at the same concentration, diniconazole was more effective than tebuconazole for producing compact and sturdy plug seedlings. All the tested twelve cultivars of Chinese cabbage showed similar response to triazole bioregulator treatment. Diniconazole single spray at 3-leaf stage at 25 mg·L^(-1) was suitable for healthy plug seedling production of Chinese cabbage. Excessive growth inhibition was resulted at high concentrations, thus resulting in poor or unmarketable seedlings.

就學前 兒童의 營養實態 調査 : 全南 靈光郡을 中心으로 Young Gwang Gun, Chun Nam

徐華中,朴垠暻,李明烈 조선대학교 기초과학연구소 1986 自然科學硏究 Vol.9 No.1

The following questionares were made through interview with their mothers of 400 children (226 male and 174 female) in Moo Ryong-ri and Do Dong-ri, Young Gwang Gun, Chun Nam, from July 22 to August 2 in 1985. ① The height and body weight of the male and female-children were above the standard all through the ages except for the 1 and 2 year-old male-children in body- weight. ② In early childhood nutrition 50.50% of subjects was breast feeding, 20.75% bottle-fed and combination-fed. In weaning period 40% of subjects was weaned within 6 months after birth, 46% of them was between 7-12 months and 14% of them were weaned after 13 months. ③ The composition rate of carbohydrates was lower than the other areas as that of carbohydrates, fat and protein was 55~75% : 12~27% respectively. ④ Snacks were served 2.7 times a day to them on the average, and were mainly eaten fruits, biscuits, cakes and ice creams. The children of 174 had an unbalanced diet and their liked mainly meats. ⑤ In food preference, the favorite foods were biscuits, fruits, milks and ice creams. The unfavorite foods were vegetables (such as onions), pepper foods, meats and food included lots of oil.

건톳 제조에 관한 연구

오명철,정창화,오창경,송대진,김수현 濟州大學校 産業技術硏究所 1999 산업기술연구소논문집 Vol.10 No.1

경관영향평가 항목선정을 위한 타당성 평가

오명성,조현주,이현택,나정화 경북대학교 농업과학기술연구소 2008 慶北大農學誌 Vol.26 No.-

This research is significant in terms of estimating the validity by setting evaluation items in view of integrating not only original beauty and visual areas but also natural ecological areas based on questionnaire. The results are as follows. 1) According to literature study, 17 items such as variety, the character of sites in terms of landscape, the beauty of landscape, visibility, and ratio of green visibility are selected. Also, 21 items such as variety of animals and plants species, size of green area, and ecological naturalness are selected m the area of landscape ecological resources. 2) As a result of questionnaire of the group of landscape experts, animals and plants ecological areas show 5.6341, the highest in importance analysis according to assessment areas. Also, as a result of importance analysis on items in each area, for example, in the area of visual resources, the item of skyline analysis is 6.0488, the highest. 3) As a result of corelation of item meaning on landscape effect assesment, for example, meaningness of psychological assessment item and landscape site item indicate 0.710, the highest coefficient correlation. 4) As critical assessment items per unit project, items such as damage minimization of original land features for project in terms of point, ratio of green visibility, variety of animals and plants species marked above 8.0 as high important medium. The project in terms of line, minimization of original land features, Preservation of worthy biotope showed high point and the character of sites in terms of landscape, minimization of original land features, the size of green area, and analysis of skyline marked above 8.5 as high importance points. On the contrary, items for climate and soil showed relatively low points.

全 地域 女子高等學校 運動選手의 營養實態 調査 : 全南體育高等學校 女學生을 中心으로

서화중,이명열,채경금 조선대학교 기초과학연구소 1985 自然科學硏究 Vol.8 No.1

The purpose of this survey was to investigate the mutrition status of the female athletes of girls' high school in Jeon-Nam related dietary and nutritional intake, questionairing about the attitude and preference on diet and nutrition and physical state. Total 90 students were investigated. Nutritional survey was carried out from August 27 to September 27 in 1984(30 days). The results are as follows: 1. Total amount of food intake per person per day was 1,163.4g(61.7%) in vegetable and 723.3g(38.3%) in animal food. 2. In daily average nutrient intake of student, the caloric intake was 2,519.6 kcal, which was composed of carbohydrate 332.3g (55.7%), protein 130g (21.8%) and at 59.7g (22.5%). Other nutrient consumption, such as Calsium(1,333.9mg). Iron(35.8mg), Vitamin A(8,472.3 I.U.), Vitamin B_1(2.6mg), Vitamin B_2(3.2mg), Niacin(53.5mg). and Vitamin C(195.2mg) were higher than the athletes recommended dietary allowance. 3. Calory intake was generally favorable, but slight difference was observed in the daily intake about the kind of athlete and the great difference was observed in the daily intake in some person. 4. The condition they felt badly was the period of after-meal(84%), before-mensturation(81%), at noon of daytime(53%), in summer(77%). It is desirable for the female athletes to increase the frequency and the amounts of between meal refreshments in order to take a nutrition evenly.

HAI 제어기에 의한 IPMSM 드라이브의 최대토크 제어

최정식,남수명,정동화 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

Interior permanent magnet synchronous motor(IPMSM) has become a popular choice in electric vehicle applications, due to their excellent power to weight ratio. The paper proposed maximum torque control of IPMSM drive using hybrid artificial intelligent(HAI) controller. The control method is applicable over the entire speed range and considered the limits of the inverter's current and voltage rated value. Also, this paper proposed speed control of IPMSM using adaptive learning mechanism fuzzy neural network(ALM_FNN) and estimation of speed using artificial neural network(ANN) controller. The proposed control algorithm is applied to IPMSM dreve system controlled ALM-FNN and ANN controller, the operating characteristics controlled by maximum torque control are examined in detail. Also, this paper proposed the analysis results to verify the effectiveness of the ALM-FNN and ANN controller.

선박용 대형 2행정 디젤기관에 있어서 모터구동 실린더 주유기의 유량 및 송출 특성

배명환,정화,안명훈 경상대학교 생산기술연구소 2003 工學硏究院論文集 Vol.19 No.-

It is of great economic importance to minimize the cylinder wear and the consumption rate of cylinder oil. The home-manufactured motor-drive cylinder lubricator is first developed by the industry-university cooperation. The effects of revolution speed, oil temperature and plunger stroke length on oil flow rate. injection delay duration, and maximum delivery and injection pressures are experimentally investigated by the cylinder lubricator developed in this study. The maximum delivery pressure of oil line in 0.03 m and the maximum injection pressure of oil line in 6.78 m away from the end of lubricating slot are risen as plunger stroke length and revolution speed are increased, but the maximum delivery and injection pressures are lowered as the oil temperature is increased without plunger stroke length.