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정기택 한국콘크리트학회 1989 콘크리트학회지 Vol.1 No.1
長大橋梁의 新工法은 近來 많은 발전을 거듭해왔고 特히 1950年 代初에 free cantilever 工法이 開發되면서 종래의 동바리 架設工法이 變形改善되어 勞賃절약과 工期短縮은 물론, 橋梁架設의 惡條件인 下部 支障物 區間에 특히 有效하게 적용되고 있는 실정이다. 또한 종래의 steel box girder 構造에서 近間에는 많은 長大橋梁이 cantilever 構造形式의 콘크리트 슬라브 구조로 그 施工法이 改善되고 있음도 괄목할 만한 事實이다. 下部 支保工없이 施工되는 長大橋梁을 施工法上 크게 分類하면 現場打設工法과 precast 工法으로 나눌수 있다. 漢江과 首都圈을 中心으로 현재 시공중인 新工法 콘크리트 長大교량에 대하여 간략하게 架設工法의 特性과 構造的 差異点에 對하여 記述하고저 한다.
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향끽미품종담배의 식혈간 거리와 식혈당 주수가 수량 및 품질에 미치는 영향
정기택,변주섭 한국연초학회 1981 한국연초학회지 Vol.3 No.1
This study was carried out to investigate the influence of distance of planting holes (51, 45, and 40 cm) and number of plants per a hole(4, 5, 6 plants) on agronomic characteristics, yield, and quality of an aromatic tobacco, Sohyang. The results are as follows: 1. Relative light intensity increased by widening the distance of holes. 2. Leaf area per a plant or per a leaf, and leaf length and width increased by widening the distance of holes and decreased by increasing the number of plants per a hole. But L. A. 1. increased by increasing the number of plants per a hole. Leaf shape index (Leaf length/Leaf width) showed little differences among treatments. 3. Dry weight of leaf, root, and stem per a plant decreased by increasing the number of plants per a hole. 4. Total nitrogen decreased by increasing number of plants per a hole and in the case of narrow distance of holes, but nicotine, reducing sugar, ether-extract and ash showed little differences. 5. Yield per 10a decreased by widening the distance of holes. 6. Quality(price per kg) was improved by increasing the number of plants per a hole at the Plot of 51m distance of holes. But there was no variation at the Plot of 45cm. And quality was decreased at the plot of 40cm distance of holes by increasing the number of Plants per a hole. 7. Price per 10a was highest in the plot of which plant spacing was $90\times$40cm and the number of plants per a hole was 4 (11112 plant/10a).
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저장중 원료 잎담배의 탄화발생과 색상 및 화학성분과의 관계
정기택,안대진,김미주,이종철 한국연초학회 2001 한국연초학회지 Vol.23 No.2
This study was carried out to evaluate the correlations among degree of carbonization, chemical components and chromatic characteristics, and to establish the criterion of carbonizaion in leaf tobacco during aging storage. The flue-cured (B2O) and burley (B2T) leaf tobaccos were redried with conventional practices for each other type, and moisture contents of leaf tobaccos were adjusted to 13, 15, 17 and 19% after redrying. The leaf tobaccos were packed in carton box and stored for 8 months in the controlled-environment rooms($35^{\circ}C$, 65% R.H. and $40^{\circ}C$, 80% R.H.). Degree of carbonization, chemical components, and chromatic characteristics(L ; black-white, a ; red to green, b ; yellow to blue) were invetigated every month. Carbonization Index (C.I.) was established as (equation omitted) in accordance with degree of carbonization in two types. The C.I. value of flue-cured leaf(56.5) for slight carbonization was higher than that of burley leaf(48.0). C.I. and rate of usable leaf, L and b were positively correlated in two types. C.I. was significantly shown positive correlation with pH in two types. The correlations between the predicted and the observed values of slight carbonizating times(month after storage) using C.I. and pH were positive significant in two types. The results suggest that cabonization index may be useful to forecast and prevent the carbonization, and pH may be useful to estimate cabonization indirectly for flue-cured and burley leaves during aging storage.
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버어리종 잎담배의 퇴적발효가 화학성분, 색상 및 끽미에 미치는 영향
정기택,안대진,김미주,이종철,이윤환 한국연초학회 2001 한국연초학회지 Vol.23 No.2
This study was carried out to evaluate the effect of bulk fermentation on chemical, chromatic, and organoleptic characteristics of burley leaf tobacco. The pile of ferment processing was taken up 32 days under the conolitions of leaf moisture contents of $28\pm1%$, with a pressure of some 200kg/$m^2$ within a closed room (mean air temperature and relative humidity ; 20.5$^{\circ}C$ and 58.7%). The pile was opened up and reconstructed two times when the maximum inside temperature reached at $45~46^{\circ}C$. The nicotine content was decreased, but amomnia contents and pH were significantly increased by bulk fermentation. Otherwise, the contents of total nitrogen, total volatile base, organic acids, and fatty acids were not affected by same treatment. The value of L(black to white), a(red to green) and b(yellow to blue) in chromatic characteristics were significantly decreased by bulk fermentation. In sensory test of the cigarettes made by addition of the tormented tobacco leaves after toasting in proportion of 19-25%, no negative characteristics in irritation, taste, and preference were detected in comparison with normally processed cigarettes(19%, 2 years fermentation, toasting). The results suggest that bulk fermentation may be useful to increase the proportion of burley leaf tobacco in the cigarettes and to shorten the period of storage for aging.
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한국 재래酒에 관한 연구 : Ⅳ報약탁주에서 분리한 효모에 관하여 Ⅳ. Isolation of yeasts from Tack Ju and Yack Ju
鄭基澤 慶北大學校 1975 論文集 Vol.20 No.-
1. 5 strains T-T-4 T-T-2 T-T-1 T-T-3, T-K-2 produced Capacity of alcohol more than 5.78% 2. 5 strains of yeast T-T-2 T-T-4 T-K-2 T-T-18 T-T-1 were the most Wailable in View of fermentative power by Capacity of CO_2 3. 6 strains T-T-2, T-K-2, T-T-4, T-S-2 T-I-3 T-I-1 are available not only taste and flavour but productive power of alcohol in sweet potato starch. 4. The Cells form of industrialized 6 strains, are long oval and round, and most of them are similar to the other yeast in size. 5. In giant Colony the Color was cream color and creambuff. and T-K-2 was formed by 15×12㎜ on diameter and by 3.5㎜ on high. 6. Optimum temperature of all strains is 25˚∼30℃ but T-K-4 is 28∼30℃ 7. Optimum PH is 3.4∼4.6 8. T-S-2 was died off at 65℃, but the strains died 60℃
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정기택,양동현 慶熙大學校 1998 論文集 Vol.27 No.-
This study used the Data Envelopment Analysis, a mathematical linear programming method, to evaluate cost efficiency of small hospitals in Korea. DEA method was applied to 48 hospitals: 9 bankrupt hospitals and 39 survived hospitals. Among the 39 sound hospitals, 10 hospitals showed efficiency score 100 but more than 23 hospitals recorded efficiency scores lower than 80. This result implies that mope hospitals can be bankrupt in the restructuring process of the industry within 1-2 years. Among the 9 bankrupt hospitals, 2 hospitals had efficiency score 100, which means that selective financial support by the government will be valuable to prevent bankruptcy of these hospitals. The logistic analysis showed no statistically significant relationship between bankruptcy and efficiency of small hospitals in Korea.
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