忠南 廣川蛇紋石鑛床 蛇紋岩의 蛇紋石化作用

禹榮均,林學秀 공주대학교 기초과학연구소 2000 自然科學硏究 Vol.9 No.-

광천사문석광상 사문암은 총 연장 약 2,000m, 최대폭 약 30m의 렌즈상 내지 맥상으로 북북동 내지 북동방향에 따라 선캄브리아기의 월현리층을 관입하였는데, 사문암과 직접 접한 암석은 각섬석편암이다. 광천사문암은 주로 50%이상의 사문석으로 구성되었으며 기원암의 잔류광물인 감람석, 휘석 및 각섬석이 소량 포함된다. 감람석과 휘석은 결정경계나 결정내 균열을 따라 사문석화되었다. 감람석으로부터 사문석화 할 때에는 MeO와 FeO값이 감소하였고 SiO₂값은 별 변화가 없다. 사문석 결정 주변의 망상조직으로 발달된 자철석은 사문석화과정에서 빠져나온 철로부터 형성된 것으로 해석된다. 한편, 휘석으로부터 사문석화 할 때에는 SiO₂값은 크게 감소하고, MgO 값은 약간 증가하였으나 FeO값은 약간 감소하였다. 광천사문암의 기원암은 더나이트와 휘석감람암 또는 해즈버자이트라고 해석되며, 이 기원암으로부터의 주사문석화작용은 광역변성작용에 의하여 이루어졌다고 해석된다. Serpentinites of Kwangcheon serpentine ore deposits occur mainly in Weolhyeon-riformation as NNE to NS trending lenticular to vein type body. They extend for about 2000m long and have maximum width of about 30m. Most country rocks very contacted with serpentinite are amphibole schists. Kwangcheon serpentinites are mainly composed of more than 50% serpentine, but partly have original minerals such as olivine, pyroxene and hornblende. Olivine and pyroxene were serpentinized along the crystal boundaries and/or cracks in the crystals. On the process from olivine to serpentine, MgO and FeO values are decreased and SiO₂values are nearly not changed. It is considered that mesh-texture magnetite around the serpentine crystals was formed from the iron which had been left out through this serpentinization process. But, on the process from pyroxene to serpentine, SiO₂values are much decreased, and MgO values are slightly increased and FeO values are slightly decreased. Also, it is considered that the original rocks of Kwangcheon serpentinites was mantle origin ultramafic rock such as dunite and, pyroxene peridotite or harzburzite, and main serpentinization of Kwangcheon serpentinites from these original rocks was formed by the regional metamorphism of greenschist to amphibolite facies.

Association of Schizophrenia and Dopamine-hydroxylase (DBH) Polymorphismin β Korean Population

김학재,김정우,박윤형 순천향의학연구소 2010 Journal of Soonchunhyang Medical Science Vol.16 No.1

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공동주택 재건축사업의 수익성 예측 모델

우광민,이학기 동아대학교 건설기술연구소 2002 硏究報告 Vol.26 No.1

The purpose of this paper is to present a model based on the probable evaluation that has a benefit forecasting ability and to study the impact of five uncertain variables on the benefit and risk of the Reconstruction Apartment Projects. The five variables are lot out price, construction cost, interests of move cost, apartment price post reconstruction, and financial cost. The result of this paper is as the following ; 1. Classify the principal variables which influence the benefit of the Reconstruction Apartment Projects into decision making variables, uncertain variables and forecast value. 2 . To forecast profits through estimating uncertain variables to the benefit and analysis the risk through the Sensitivity Analysis and S-Curve. 3. Determinate either advance or stop of the Projects through finding out the relation of profit and risk.

α-디아조 케톤과 올레핀의 광반응

李學沂,曺燦湜,金宇鍾,禹海允 慶北大學校 1990 論文集 Vol.50 No.-

The majority of carbenes add to olefins to give cyclopropanes. In this study, 2-diazo-1,3-indandione, 2-diazo-1-indanone, and 3-diazooxindole were used as carbene precursors. Irradiation of these diazo compounds with trichloroethylene, acrylonitrile, cyclohexene, and cyclooctene was investigated. The addition of carbenes to benzene generally affords norcaradiene or cycloheptatriene or both. Irradiation of 2-diazo-1,3-indandione with benzene gave only cycloheptatriene derivative in 24% yield. But irradiation of 2-diazo-1-indanone with benzene gave norcardiene in equiribrium with cycloheptatriene derivative in 24% yield.

패러글라이더의 날개끝각의 변화에 의한 양항특성연구

김진우,김학윤,김우진,이봉준 한국항공대학교 항공우주산업기술연구소 2002 航空宇宙産業技術硏究所 硏究誌 Vol.12 No.-

본 논문에서는 패러글라이더의 날개끝각을 변화시켜서 양항비를 증가시키는 새로운 기술에 대하여 연구하였다. 패러글라이더의 날개끝각을 변화 시킬 때 양항특성에 미치는 영향을 실험과 비행시험에 의한 방법으로 연구하였다. 풍동실험에서는 가로세로비가 4.5인 패러글라이더의 모형을 사용하여 날개끝각이 변할 때 패러글라이더의 양항특성에 미치는 영향을 연구하였으며 그 결과 재래식 패러글라이더보다 날개끝각이 변하는 패러글라이더가 양항비가 증가하는 효과가 있음을 알 수 있었다. 비행실험은 "에델"사의 고급 기종인 "Response"를 사용하여 비행중 속도비에 대한 영향을 조사하였다. 그 결과 실험치와 잘 일치함을 보였다. In this paper, a new technology which increases the lift-drag ratio of a paraglider by varying wing tip angle is presented. An experimental study and flight test have been performed on the lift and drag characteristics of a paraglider with various wing tip angle. A wind tunnel investigation has been conducted to determine the effects of wing tip angle variation on the lift and drag characteristics of a paraglider model of aspect ratio 4.5. The results show that a paraglider with variable wing tip angle is more effective in increasing the lift-drag ratio than conventional paraglider. A flight test was conducted by using Edel's advanced "Response" paraglider on the effect of speed ratio. The flight test results agree favorably with the experimental data.

充塡 氣泡塔에서의 溫度變化에 따른 諸特性 硏究

李鍾學,鮮宇昌辰,金雨植 연세대학교 산업기술연구소 1977 논문집 Vol.7 No.1

The performance of packed bubble column was investigated in a 3 inches I.D. acryl column packed with spiral wires. The effect of temperature on a gas hold-up(??) was studied from 15℃ to 45℃ in air-distilled water system with superficial gas velocity variation, and the over-all height of transfer unit ((H.T.U.)??), volumetric liquid phase mass transfer coefficient (??) and over-all absorption efficiency (??) were studied from 25℃ to 55℃ in CO₂-air-distilled water system, holding other conditions constant. The resulte showed that the ?? had the maximum value at 35℃ in unvibrational air-distilled water system and 25℃ in vibrational acceleration system. And the value of ??, ?? and E? were increased with increasing temperature up to 45℃ and decreased with increasing temperature above this value in CO₂ absorption system. The effect of temperature on k?a and (H.T.U.)? was relatively high, and effect on ?? and ?? was slight.

마사지프로그램이 만성요통 환자의 통증평가척도 변화에 미치는 영향

오학수,오동우 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1

The purpose of this study is to find out the effects of the Massage Program applied to the patients with chronic low back pain(CLBP) by measuring, assessing and analyzing the changes in intensity and unpleasantness of pains before and after Massage Program. Surveyed from March 2003 to August 2003 were 87 patients suffering from LBP. In the Massage Program, such methods as Effleurage, Petrissage and Deep transverse friction were selected as they are among traditional massage treatments frequently used for muscles with pain and spasm. Effleurage and Petrissage treatments were applied for 20 minutes in total before and after Deep transverse friction treatment. After Massage Program, the McGill Pain Questionnaire Word List(MPQWL), Verbal Rating Scale(VRS), Visual Analogue Scale(VAS) were used to measure the degree of the pain on the patients. After Massage Program, the intensity and unpleasantness of pains were measured and analyzed by means of VAS-I and VAS-U. The major findings from this study are as follows; 1. There was significant decrease in the numerical values of the VAS & VRS and the MPQWL after Massage Program(p<.05). 2. There was significant decrease in the intensity of pains after Massage Program(p<.05). 3. There was also significant decrease in the unpleasantness of pains after Massage Program(p<.05). 4. From the analysis into chronological changes in the intensity and unpleasantness of pains before and after Massage Program with ANOVA, it became evident that the longer the period of treatment was, the higher the pains decreases drastically, while significant difference was shown in the intensity and unpleasantness of pains(p<.05). Summed up, it can be generally concluded that Massage Program is an effective treatment to rid the patients with CLBP of pains safely and promptly.

重金屬이온의 除去를 위한 새로운 이온 交換樹脂製造에 關한 硏究

李學沂,金祐埴,金淳植 慶北大學校 1981 論文集 Vol.32 No.-

Crosslinked polyacrylamide was prepared from acrylamide and divinylbenzene by the radical polymerization in methanol to prepare crosslinked polyvinylamine by the Hoffmann reaction. A Crosslinked aminocarboxylic acid resin was finally prepared by the reaction of the crosslinked polyvinylamine and chloroacetic acid. Another Aminocarboxylic acid resin was also prepared to make reference to the reaction of the crosslinked polyvinylamine with chloroacetic acid. The ion exchange capacities of the crosslinked aminocarboxylic acid resin for Zn^+2, Cu^+2, Co^+2, and Ni^+2 varied with pH and proved to be relatively high with the pH range of 6-7. The order of ion exchange for heavy metal ions was Zn^+2〉Cu^+2〉Co^+2〉Ni at the above pH region.

당뇨병성 신증 환자 20예에서 복합한약전탕액이 신기능에 미치는 영향

최우정,김동웅,신선호,이언정,최진영,신학수,조권일,이광석 대한동의생리학회,대한동의병리학회 2003 동의생리병리학회지 Vol.17 No.2

Diabetic Nephropathy is one of the major causes of chronic renal failure. It is a common microvascular complication and clinically defined as the presence of persistent Proteinuria. We studied the effects and change of the renal function of Complex Herbal medication of the 20Diabetic Nephropathy patients. We measured the initial levels of Total Protein, Creatinine Clearance Rate(Ccr), Serum Creatinine(Serum-Cr), Urine Creatinine(Urine-Cr) and HbA1C on admission and followed up the level changes of Total Protein, Ccr, Serum-Cr and Urine-Cr on discharge. The results are following : Complex Herbal Medication does not cause the renal toxicity. The longer hypertension period is, the higher Serum-Cr level and Urine-Cr level. In an older age group, Urine-Cr is lower. 4.From the "Deficiency in Origin and Excess in Superficiality(本虛表實)“points of view, Complex Herbal Medication improves the Serum-Cr in Diabetic Nephropathy patients. According to this results, it could be suggested that Complex Herbal Medication does not cause the renal toxicity in Diabetic Nephropathy patients and intensive controls of blood sugar, blood pressure and Complex Herbal Medication prevent the renal failure in Diabetic Nephropathy patients with early stage of Microalbumiuria.

2-Vinylpyridine과 Methylmethacrylate의 Anion共重合

李學沂,金祐埴,鄭明秀 慶北大學校 1975 論文集 Vol.20 No.-

2-Vinylpyridine and methylmethacrylate were copolymerized with n-butyllithium as an initiator in n-hexane at o˚ to determine the reactivity ratio of this monomer system. r_1=0.041(2-vinylpyridine) r_2=1.14 (methylmethacrylate) From the reactivity ratio and Q-e value, it was known that the copolymerization of this monomer system is anionic and controlled by the polar effect of the monomer.