사립체 DNA 뉴클레오타이드 3243 A→G 돌연변이 [MTTL1^*MELAS3243G]에 의한 MELAS 증후군

박기형,김승현,이영주,김희태,김주한,김명호,박성섭 대한신경과학회 1998 대한신경과학회지 Vol.16 No.4

林土의 有機物의 分解速度와 無機養料의 垂直分布에 關한 考察

金遵敏,張楠基,鄭玩鎬 서울대학교 교육대학원 학술연구회 1966 論文集 - 서울대학교 교육대학원 Vol.3 No.-

Kim Choon Min, Chang Nam Kee and Chung Whan Ho: Decomposition rate of plant residue and the vertical distibution of mineral nutrients in the woodland soil. The relationship between decomposition rate of litter and the amount of mineral nutrients dispersed to the soil horizons were studied on the oak and pine forest stand. The results are as follows: 1. Decomposition rate of litter was highest in the F horizon of the oak stand, however in the pine stand it was highest in H horizon. 2. The correlation coefficients between decomposition rate and humus, organic carbon, moisture content, calcium, phosphorus, and nitrogen in the pine stand are; 0.90, 0.98, 0.76, 0.98, and 0.88, in oak stand; 0.97, 0.93, 0.92, 0.97, 0.74 and 0.73. 3. Factors which affect the decomposition rate of litter are humus, organic carbon, moisture content, calcium, phosphorus and nitrogen. 4. Among the variables, PH, moisture content and phosphorus under the oak and pine forest showed significant differences in each horizon. 5. C/N ratio of pine stands is higher than that of oak stands studied. 6. The vertical distribution of mineral nutrients is highly related with the amount of humus accumulated on top soil.

은행잎 추출물이 협심증 환자의 내피 세포 기능에 미치는 장단기 효과

배장호,김기식,이인규,김여희,김민수,김기영,남창욱,김윤년,김권배,정시전 대한순환기학회 1999 Korean Circulation Journal Vol.29 No.9

두개골의 3차원 영상 분석을 위한 전산화단층촬영 방법의 비교 : 상층 두께가 3차원 영상의 계측에 미치는 영향

정호걸,김기덕,박혁,김동욱,정해조,김희중,유선국,김용욱,박창서 대한구강악안면방사선학회 2004 Imaging Science in Dentistry Vol.34 No.3

Purpose : To evaluate the quantitative accuracy of three-dimensional (3D) images by means of comparing distance measurements on the 3D images with direct measurements of dry human skull according to slice thickness and scanning modes. Materials and Mathods : An observer directly measured the distance of 21 line items between 12 orthodontic landmarks on the skull surface using a digital vernier caliper and each was repeated five times. The dry human skull was scanned with a Helical CT with various slice thickness (3, 5, 7 mm) and acquisition modes (Conventional and Helical). The same observer measured corresponding distance of the same items on reconstructed 3D images with the internal program of V-works 4.0 (Cybermed Inc., Seoul, Korea). The quantitative accuracy of distance measurements were statistically evaluated with Wilcoxons’ two-sample test. Results : 11 line items in Conventional 3 mm, 8 in Helical 3mm, 11 in Conventional 5 mm, 10 in Helical 5 mm, 5 in Conventional 7 mm and 9 in Helical 7 mm showed no statistically significant difference. Average difference between direct measurements and measurements on 3D CT images was within 2 mm in 19 line items of Conventional 3 mm, 20 of Helical 3 mm, 15 of Conventional 5 mm, 18 of Helical 5 mm, 11 of Conventional 7mm and 16 of Helical 7 mm. Conclusion : Considering image quality and patient’s exposure time, scanning protocol of Helical 5 mm is recommended for 3D image analysis of the skull in CT.

3차원 전산화단층촬영 영상을 이용한 안면 연조직 두께 계측의 임상적 유용성

정호걸,김기덕,한승호,허경석,이제범,박혁,최성호,김종관,박창서 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.36 No.2

Purpose : To evaluate clinical usefulness of facial soft tissue thickness measurement using 3D computed tomographic images. Materials and Methods : One cadaver that had sound facial soft tissues was chosen for the study. The cadaver was scanned with a Helical CT under following scanning protocols about slice thickness and table speed; 3 mm and 3 mm/sec, 5 mm and 5 mm/sec, 7 mm and 7 mm/sec. The acquired data were reconstructed 1.5, 2.5, 3.5 mm reconstruction interval respectively and the images were transferred to a personal computer. Using a program developed to measure facial soft tissue thickness in 3D image, the facial soft tissue thickness was measured. After the ten-time repeation of the measurement for ten times, repeated measure analysis of variance (ANOVA) was adopted to compare and analyze the measurements using the three scanning protocols. Comparison according to the areas was analyzed by Mann-Whitney test. Results : There were no statistically significant intraobserver differences in the measurements of the facial soft tissue thickness using the three scanning protocols (p>0.05). There were no statistically significant differences between measurements in the 3 mm slice thickness and those in the 5 mm, 7 mm slice thickness (p>0.05). There were statistical differences in the 14 of the total 30 measured points in the 5 mm slice thickness and 22 in the 7mm slice thickness. Conclusion : The facial soft tissue thickness measurement using 3D images of 7 mm slice thickness is acceptable clinically, but those of 5 mm slice thickness is recommended for the more accurate measurement.

임상 증상이 심하지 않은 심낭 삼출 환자의 장기 추적 결과

배장호,김기식,강미숙,남명희,김미정,김민수,김기영,님창욱,김윤년,김권배,정시전,김여희 대한순환기학회 1999 Korean Circulation Journal Vol.29 No.7

단어경계에서 영어 폐쇄음의 인지 양상 연구

김지향(Kim, Ji-Hyang),김기호(Kim, Kee-Ho) 언어과학회 2015 언어과학연구 Vol.0 No.73

The purpose of this paper is to investigate how the patterns of the perception of English stops in word boundaries are related to those of their production. As was discussed in Kim, Ji-Hyang and Kim, Kee-Ho (2014), the closure duration of the stops in the word boundaries, the duration of VOT, and vowel duration are said to be the main characteristics of the production of English stops by the English and the Korean speakers. Based on this, it will be examined in this paper how the three factors play a role in the perception of English stops in word boundaries by the English and the Korean listeners.

곰팡이에서 분리한 Helicobacter pylori 항균물질의 분리 및 구조규명

남궁준,연승우,백남수,김태한,김영호,김창진,김기원 충남대학교 약학대학 의약품개발연구소 1998 藥學論文集 Vol.14 No.-

Helicobacter pylori is a Gram-negative bacterium which causes chronic gastritis and is associated with gastric ulcer, duodenal ulcer and gastric carcinoma. In the process of screening of antibacterial activities against H. pylori from soil microorgani는, fungus No. 60686 was isolated. After fementaion of No. 60686, the antibacterial compound was isolated, purified and followed by extraction of mycelium with orgainic solvents, acetone and ethyl acetate, through silica gel chromatography, LH-20 gel chromatography and HPLC. As a result of the structural analyses of the compound by IR, ^1H- and ^13C-NMR, FAB/Mass spectrophotomer, the compound having the antimicrobial activity was idenfitied as chaetoglobosin A (C_32H_36N_2O_5), a cytochalasan derivative. The antimicrobial activity of chaetoglobosin A was tested against Gram-positive and negative bacteria by paper disk method. Among the test strains of 9 Gram-positive bacteria and 18 Gram-negative bacteria containing 4 H. pylori strains, the growth of 4 H. pylori strains and 3 S. aureus strains (SG 511, 285 and 503) was only inhibited by chaetoglobosin A. Also it was shown that its growth inhibition against H. pylori strains was stronger than that against S. aureus strains at the treatment of the same concentration. Therefore it was concluded that chaetoglobosin A has a specific growth inhibition against H. pylori of the tested bacteria.

기업의 소유 구조와 의결권의 가치

김기호 울산대학교 2000 경영학연구논문집 Vol.7 No.2

본 연구는 구형우선주를 발행한 한국상장기업을 대상으로 의결권의 가치에 영향을 미치는 요소들이 무엇인지를 Zingales의 모형을 이용하여 분석하였다. 그 결과 가설에서 설정한 것처럼 보통주와 우선주의 가격차이비율은 경영권을 획득하여 기업을 지배할 경우 얻을 있는 Private Benefits의 기대값의 크기에 의존함을 발견하였다. 표본기간인 1996년부터 1999년 4년간의 자료를 포함시킬 때, 지배대주주가 얻을 수 있는 Private Benefits의 크기가 기업 전체 Cashflow 중 20-30%이었다. 기대 Private Benefits은 경영권을 획득하였을 때 얻을 수 있는 Private Benefits과 소액주주가 보유한 지분이 경영권의 향배를 결정 짓는 확율의 개념을 의미하는 Shapley Value를 변형시킨 Relative Shapley Value를 총주식중 의결권 있는 주식의 비중으로 나눈 값의 곱으로 나타난다. 이외 의결권의 가치에 영향을 미치리라 예상되는 여러 통제변수를 분석에 포함시킨 결과, 우선주식의 유동성과 재벌 그룹의 소속여부는 의결권의 가치에 음의 영향을 미쳤으며, 배당수익률의 차이와 기업규모는 양의 영향을 미치는 것으로 나타났다. Ownership Structure and the Value of the Vote in the Korea stock Market This paper studies the determinants of the value of voting rights for Korean Listed firms which issued old fashioned preferred stock for the period from 1996 to 1999, by using Zingales model. Results support the hypothesis that the value of a vote is determined by the expected private benefits shareholders will receive for their vote in case of assuming the control of a firm. For the whole sample period, up to 20 - 30% of the variation of the voting premium are explained by this factor. The expected private benefit is the function of private benefit obtainable by controlling the company and the probability that the fraction of stock owned by small shareholders is pivotal in a control contest. While the relative liquidity of preferred stock over common stock and a dummy varible whether a firm is chaebol related shows negative effects, the difference of dividend yields and the size of the firm have positive effects to the voting premiums.

國際株式市場의 相互關聯性에 관한 實證分析 : 韓國, 美國, 日本의 주식시장을 중심으로

金基昊 울산대학교 1993 사회과학논집 Vol.3 No.1

國際的으로 株價의 同調化 現狀이 나타나면 國際分散投資의 利點인 체계적 위험의 減少가 不可能하다. 先進國들간의 株價 同調化에 관한 硏究에 의하면, 初期의 硏究에서는 月別收益率 혹은 週刊收益率 資料를 이용하여 國際的인 株價의 變化는 同調化 現狀이 낮아 각 國家의 國內市場은 서로 독립적인 움직임을 보이고 있기 때문에 國際的인 分散投資의 이점이 存在한나 고 주장되었다. 그러나 日別資料 혹은 時間別 資料를 이용하여 株價變化의 同調化 現狀을 硏究한 80年代 후반의 請究들은. 1987년 10월 美國의 株式價格 大暴落前後의 시기에 있어서는 先進諸國들 사이에 株價의 同調化 現狀이 나타나고 있음을 주장하고 있다 資本自由化를 시행하고 있는 우리나라의 경우. 이러한 관점에서 外國의 증권市場에서 형성되는 株價變化가 우리나라에도 影響을 미치는 지를 80年代 후반의 日別 株價指數를 이용하여 檢討해 보았다. 實證資料에 의하면 85년부터 91년도까지 韓國의 資本市場의 變化는 外國市場 의 직전일 흑은 동일의 株價變化에 거의 影響을 받지 않으며 國內市場은 독립적인 價格變化를 보여주고 있음을 확인하였다. 이러한 사실은 標本期間을 前半期와 後率期로 구분하여서도 유사한 결과를 보여 주었을 뿐만 아니라. 作成方法이 서로 다른 여러 指數들을 사용한 경우에도 근본적인 變化를 찾아 볼 수 없었다. 이러한 사실은 韓國의 株式市場은 國際投資家의 國際的인 分散投資의 훌륭한 對象이 된다고 볼 수 있다. This paper examines the interrelatedness of Korean Stock market indices with U.S. and Japan Stock market indices to test whether the movement of Korean Stock market is affected by the movement of foreign stock markets. Various daily stock market indices data for three countries for the period from 1985 to 1991 were collected and analyzed by Regression Analysis. The empirical findings in this paper suggest that Korean stock market is independent of major stock markets, U. S. and Japanese stock markets. However as time nears to the present, the movement of Korean stock market is more influenced by the movement of Japan market than the past. But the extent of variation explained by the movement of Japan market was too low to assert that Korean stocks market is integrated to the Japan Market.. The implication of the above mentioned empirical findings is that Korean stock market could be an attractive target for international diversification to reduce systematic risk.