싱글 튜브 시스템 BTA 工具를 使用한 SM55C 鋼의 深孔 加工 特性에 관한 硏究

全泰玉,全彦燦,沈成輔,張性圭 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.2

The BTA deep hole machining has an increasing demand because of its wide applications and its good productivity. The main feature of the BTA drill is that the tool cutting edges are unsymmetrically located on the boring head. This provides a stabilizing cutting force resultant necessary for self guidance of the boring head. The BTA drills are capable of machining for having large length to diameter ratio in single pass. The study of the accuracy and surface finish of holes produced would reveal quite useful information regarding the process. This thesis deals with the experimental results obtained during single tube system BTA machining on SM55C steel for different machining conditions.

콘크리트 크리프와 건조수축의 CEB-FIP Model Code와 ACI Code의 비교

전쌍순,박태균,황택균,엄장섭,진치섭 釜山大學校生産技術硏究所 2002 生産技術硏究所論文集 Vol.61 No.-

크리프 현상으로 인하여 구조물의 변형이나 처침은 시간의 경과와 더불어 중대하게 되고, 라멘, 아치 등과 같은 부정정 구조물에서는 건조수축으로 인한 부재의 변형 때문에 큰 수축응력이 일어난다. 따라서, 일시적으로 작용하는 하중에 비하여 지속하중이 큰 구조물에 있어서는 크리프의 영향을 설계해야 하고, 콘크리트 구조설계에서 건조수축은 매우 중요하다. 우리나라 콘크리트 설계기준을 비롯하여 세계각국의 코드에 크리프와 건조수축에 대해서 규정하고 있다. 그러나, 크리프와 건조수축에 관한 규정이 매우 복잡한 식으로 제시되어 있어 수 계산으로는 크리프 및 건조수축병형률을 계산하기가 어렵다. 본 연구에서는 Windows 환경에서 쉽게 CEB-FIP Model Code 및 ACI Code에 의한 크리프와 건조수축 변형률을 계산할 수 있는 프로그램을 작성하여 글 결과를 서로 비교 고찰하였다. Concrete under stress undergoes a gradual increase of strain with time because of creep deformations of the concrete. The final creep strain may be several times as large as the initial elastic strain. Generally creep has little effect on the strength of a structure, but it will cause a redistribution of stress in reinforced concrete members at the service loads. When concrete loses moisture by evaporation, it shrinks. Shrinkage strains are independent of the stress conditions in the concrete. If restrained, shrinkage strains can cause cracking of concrete and will generally cause the deflection of structural members to increase with time. In 2000, the Korea Concrete Institute Code took up CEB-FIP Model Code instead of ACI Code on creep and shrinkage of concrete, but their calculation procedures are tedious and difficult. In this study, programs are provided and it will be useful for the practicing engineers.

최대하 운동시 온도·습도 변화에 따른 피부온도와 발한량의 변화

전태원,장창현,정덕조 師範大學 體育硏究所 1994 서울大學校 體育硏究所論集 Vol.15 No.1

The study was to investigate the difference of the total sweat rate, local sweat and skin temperature according to environments during submaximal exercise. For this, eight male field hockey athletes were made to take bicycle exercise of 40% Vo₂max for 60min. The environmental conditions were divided into four groups ; Environment Ⅰ (Temperature 18℃, Relative Humidity 40%). Environment Ⅱ (Temperature 18℃, Relative Humidity 70%). Environment Ⅲ (Temperature 30℃, Relative humidity 40%). Environment Ⅳ (Temperature 30℃, Relative Humidity 70%). Local sweat rate, rectal temperature and main skin temperature were recorded every 10 minutes by thermister, total sweat rate measured by the weight loss during the exercise. Local sweat rate according to environments during submaximal exercise increased mainly by relative humidity. The other local skin temperature and the rising-rate of body temperature had an effect on it. Total sweat rate according to environments during submaximal exercise was more influenced by hot-high humidity rather than by temperature especially led to the 1,400g's weight loss during the one hour exercise. Local skin temperature according to environments during submaximal exercise was significantly differentiated by temperature and humidity as well as by time. Mean skin temperature according to environments during submaximal exercise was varied, up-and-down repeatedly. No relationships between rectal temperature or local skin temperature and total sweat rate or local sweat rate but these factors were partly interrelated. To conclude, total sweat rate was influenced most by humidity and local sweat rate differed according to local skin temperature and the rising-rate of body temperature.

항진균물질을 생산하는 Streptomyces fimbriatus AF21-3의 분리 및 동정

장주현,김정완,이우윤,윤영준,이경림,김승곤,이태수 인천대학교 2000 基礎科學論文集 Vol.11 No.1

Actinomycetes were isolated from soil to find new antibiotics. An active antimicrobial compound was isolated from the culture filtrate of Actinomycetes AF 21-3. The Actinomycetes strain which showed strong antifungal activity against Candida tropicalis and Microsporum gypseum was identified as Streptomyces fimbriatus and named as Streptomyces fimbriatus AF 21-3.

정신과 입원환자의 공격행동 특성

전태연,권용실,도규영,장계호 大韓神經精神醫學會 1997 신경정신의학 Vol.36 No.3

저자들은 1994년 1월 1일부터 1995년 6월 31일까지 가톨릭대학교 의과대학 의정부성모병원 정신과에 입원했던 환자들 중세서 공격행동을 보인 환자(공격군) 72명과 공격행동이 없었던 환자(비공격군) 215명의 임상적 특성에 관한 조사를 하여 다음과 같은 결과를 얻었다. 1) 공격행동을 보인 환자는 72명으로 전체 조사 환자의 25.1%이었다. 2) 성별, 연령, 종교, 결혼 상태와 정신과 질환의 가족력 등에 따른 공격행동의 발생비율의 차이는 유의하지 않았다. 3) 교육 정도와 직업에 따른 공격군의 비육에 유의한 차이가 있었다(p<.05). 4) 진단별로는 공격군에서 조증, 기질성 정신장애, 정신분열증의 빈도가 높았으나 진단에 따른 의미 있는 차이는 없었다. 5) 공격행동의 기왕력은 공격군에서 더 많았고 비공격군과 비교시 의미 있는 차이를 보였으며(p<.001), 입원 형태는 공격군에서 타의 입원의 빈도가 유의하게 높았다(p<.005). 7) 입원시 정신병리는 초조-흥분과 적대감-의심에서 공격군의 빈도가 높았으며 정신병리에 따른 의미 있는 차이를 보였다(p<.001). 8) 총 재원 일수는 공격군에서 평균 59.3일이었고 비공격군이 평균 38.4일로 유의한 차이를 보였다(p<.001). 9) 공격행동의 유형은 말로한 경우가 가장 많았고 물건을 대상으로한 행동, 타인을 대상으로 하는 행동의 순으로 나타났다. 10) 공격행동 직전 행동 특징은 활동증가, 시끄러움, 욕설, 분노, 적대적이었던 경우가 가장 많았다. 11) 공격행동은 정오에서 오후 6시 사이, 휴식시간에 가장 많이 나타났다. 12) 입원 후 1주일 이내에 공격행동의 62.3%가 나타났다. 13) 총공격 점수에 의미 있게 영향을 주었던 변인들로는 종교(p<.05), 교육 정도(p<.05), 직업(p<.05), 입원형태(p<.005), 진단(p<.001), 입원시 정신 병리(p<.001), 공격행동의 기왕력(p<.001) 등으로 나타났다. To evaluate the characteristics of violent behavior of psychiatric inpatients the authors reviewed clinical records of psychiatric patients who had admitted at UiJong Bu St. Mary's Hospital from January 1994 to June 1995. We divided the 287 subjects into violent and nonviolent group according to the presence of violent behaviors in psychiatric ward. We assessed demographic variables, clinical characteristics and violent behaviors using Overt Aggression Scale and compared these variables of violent group with nonviolent group. The results were as follows : 1) The number of violent patients was 72(25.1% of the total). 2) In terms of demographic variables, the differences between two groups in education and occupation were significant(p<.05). 3) In psychiatric diagnoses, violent group were more likely to have mania, schizophrenia and organic mental disorder in sequence but there were no differences between violent and nonviolent group. 4) The history of violent behavior was greater in violent group(p<.001) and the mode of admission was significantly different between two groups(p<.005). 5) In cluster of psychopathology on admission, more frequently found clusters of psychopathology in violent group were agitation-excitement and hostile- suspiciousness and there were significant differences between two groups(p<.001). 6) The length of stay in violent group(59.3 days)was significantly longer than nonviolent group(38.4 days)(p<.001). 7) The types of violent behavior were verbal aggression, physical aggression against objects and physical aggression against other people in frequency sequence. 8) The most frequent type of behavioral clue before violent behavior was hyperactive, loud, verbally abusive, angry, hostile(68.1%). 9) Most of violent behaviors were presented between midday and 6 pm. in resting time. 10) 62.3% of total violent behaviors were occurred within first week following admission. 11) The variables which showed significant effects on total aggression score were religion, educational status, occupation, mode of admission, psychiatric diagnosis, psychopathology on admission and history of violent behavior before admission. In summary, these results showed similar trends compared to previous studies on characteristics of psychiatric inpatients. And we found that more important predictors of violent behavior in practice were likely to be history of violent behavior, psychopathology on admission and behavioral cue before violent behavior.

인슐린 비의존형 당뇨병 환자에서 당뇨병성 신증의 지표로서 혈청과 요Ⅳ형 collagen의 의의

장태종,최병진,반금진,노영호,김소연,조민구,이권전,김윤권 대한신장학회 1996 대한신장학회잡지 Vol.15 No.4

전방 천골 수막류 - 증 례 보 고 -

박준석,신원한,김범태,변박장,최순관 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.11

주요 우울증에서 종양괴사인자-베타 유전자의 다형성

전태연,배치운,김영호,장계호,이정태,박원명,김광수 대한신경정신의학회 2000 신경정신의학 Vol.39 No.6

연구목적 : 주요 우울증은 역학적 유전연구 등을 통하여 유전적 영향이 높은 것으로 알려져 있으며 최근에는 분자 유전학적 연구로 유전자 다형성과 질병의 연관성을 밝히는 것이 정신질환의 유전학적 연구에서 중요한 부분을 차지하고 있다. 이에 본 연구는 중추신경계와 면역계간의 상호작용에 관여하는 싸이토카인 중 TNF-β 유전자의 다형성을 분석하여 주요 우울증과의 유전학적 관련성을 알아보고자 하였다. 방 법 : DSM-IV에 의하여 주요 우울증으로 진단된95명을 환자군으로 선정하였고 가톨릭조혈모세포정보은행에서 보유하고 있는 정상 한국인 202명의 자료를 정상 대조군으로 사용하였다. 전혈에서 DNA를 추출하고 TNF-β 유전자 부위를 증폭한 후 제한효소 Nco Ⅰ으로 절단하여 555bp와 185bp의 절편을 갖는 TNFB*1과 Nco Ⅰ절단부가 없는 740bp의 절편 TNFB*2등 2가지 대립유전자의 제한효소절편길이 다형성을 조사하였다. 모든 자료의 분석은 x²검증을 이용하였다. 결 과 : 1) 주요 우울증과 정상 대조군 간에 TNFB유전자인 TNFB*1/1, TNFB*1/2 및 TNFB*2/2의 발현 빈도에는 유의한 차이가 없었다. 2) 두 군 간에 TNFB*1 과 TNFB*2 두 대립유전자의 빈도에는 유의한 차이가 없었다. 결 론 : 본 연구에서는 주요 울울증군과 정상 대조군 간에 TNFB*1과 TNFB*2의 두 대립유전자 발현 빈도에 유의한 차이를 발견하지 못하였다. 따라서 TNFB 유전자다형성과 주요 우울증과의 유전학적인 연관성이 없었다. 향후 연구에서는 다양한 임상변인을 포함하여 보다 통합적이고 체계적인 연구가 이루어져야 할 것으로 생각되었다. Objective : Major depressive disorder is known to have high genetic predisposition and the main focus of recent genetic studies in major depressive disorder has been concentrated on association studies between genetic polymorphism and disease, since molecular genetic methods have been developed. This study was designed to investigate the relationship between major depressive disorder and immunogenetic influences by analyzing polymorphism of TNFB gene, which is involved in interaction of immune system and CNS. Method : 95 persons who had been diagnosed of major depressive disorder were assigned as patient group and, 202 data obtained from Catholic hemopoietic stem cell bank, College of medicine, the Catholic University of Korea, were used as normal controls in this study. DNA was extracted from whole blood, thereafter amplified by polymerase chain reaction, and digested by Nco Ⅰ.After that procedure, we obtained and assessd restriction fragment length polymorphism of two alleles, TNFV*1 which has 555bp and 185bp fragments and carries the Nco Ⅰ restriction site, and TNFB*2 of 740 bp fragment lacks the Nco Ⅰ restriction site. All data were analyzed by x²test with two-tailed Fisher's exact test. Results : 1) The frequencies of TNFB*1/1, TNFB*1/2, and TNFB*2/2 were not statistically different between major depressive disorder patients and control group. 2) The frequencies of TNFB*2 and TNFB*1 were not statistically different between major depressive disorder patient group and normal control group. Conclusion : We did not verified the differences of frequency in TNFB*1/TNFB*2 gene between the major depressive disorder and normal controls, respectively. Consequently, there is no genetic relationship between major depressive disorder and gene polymorphism of TNFB. We do suggest that further systematic studies including various clinical variables should be conducted.

남강댐 유역에서의 HEC-HMS 모형의 적용성

박준일,신형우,조봉철,장영태 경상대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.16 No.-

In order to find out the runoff characteristics in Nam River Dam basin, hydrological data such as rainfall, water level, and discharge, have been collected and measured. Using the collected and measured data for the study area during 1990-1999, hydrological parameters were estimated. The HEC-HMS(Hydrologic Modeling System) model was used to review the applicability of flood hydrographs and the results of simulation were compared to the observed data and Stroge Function Method for several flood hydrographs in this study. From the results of analysis, the following conclusions were obtained: First, the HEC-HMS model showed better results for the capabilities of regenerating flood hydrographs Second, the fluctuation shape of flood hydrographs for the rainfall distribution concentrated on head have been shown peak time to be relatively short for other rainfall distribution. Third, for forecasting and warning of flood occurrence in future, it is necessary that the existing hydrological data were made good and hydrological data were accumulated more. Also, using the HEC-HMS model to complement the Storage Function Method, it is possible that forecasting and warning flood occurrence is progressive in Nam River Dam.

GIS를 위한 홍수유출해석에 관한 연구

박준일,함계운,성오경,장영태,김경훈 경상대학교 생산기술연구소 2003 工學硏究院論文集 Vol.19 No.-

In the rainfall-runoff simulation, it is crucial problem to extract the hydrologic topographical factors that are used as the model input parameters. Those factors are drawn out from DEM(Digit a1 Elevation Model) along with GIS(Geographic Information System) techniques represent a wide range of topographical informations. GIS is employed to estimate the parameters and examine application. Also, the results from different GIS data and analysis methods are examined. In the study, spatial data are calculated using WMS(Watershed Modeling System) v.6.1, which is hydrologic analysis software coupled with GIS, and flood analysis is accomplished by HEC-1 included in WMS, and applied to Dukchon River basin. To calculate the effective rainfall CN values of NRCS are used. Clark, Snyder and NRCS methods are selected to derive unit hydrograph respectively. In addition, the characteristics of runoff responses according to the selection of GIS spatial data for NRCS CN, TIN or Grid used to extract hydrologic topographical informations. and the number of partitioning sub-basin are investigated.