Line Drawing Image의 처리와 벡터화 시스템

배석찬,이태헌,신성윤 群山大學校 1996 論文集 Vol.23 No.-

This paper proposes an approach to the segmentation, vectorization and representation of large-size line drawing images. The scaned digital image used to preprocessing and vectorization, resulting data was transffered CAD/CAM system. Processing step was noise removal, void filling, image segmentation, line thinning and contour extraction. Raster-to-vector conversion was performed by recognition and fitting of straight line segments, circles, arcs, and conic section. Experimental results are also shown

슬관절 등속성 운동시 근골격 모델의 검증:실험 및 모의실험 연구 : 실험 및 모의실험 연구 An Experimental and Simulatio study

배태수,강성재,최경주,김신기,유재욱,진미령,문무성 대한정형외과연구학회 2003 대한정형외과연구학회지 Vol.6 No.2

연속파형 Nd:YAG 레이저에 의한 인코넬 600의 용접 공정변수의 연구

배신철,유영태,송성욱,신호준,나기대 朝鮮大學校 機械技術硏究所 2004 機械技術硏究 Vol.7 No.1

The laser welding process is one of the most advanced manufacturing technologies owing to its high speed and deep penetration. Welding characteristics of Inconel 600 Alloy using a continuous wave Nd:YAG laser are experimentally investigated. The major process parameters studied in the present laser welding experiment were position of focus, laser power, travel speed. The gap and offset maintained as small as possible. Optical microscope were used to investigate the microstructures of the welded zone. The follow conclusions can be drawn the laser power and travel speed have a pronounced effect the fusion zone size and shape.

Site-Directed Mutagenesis법에 의한 RecA 단백질의 ATPase 활성 부위 검정 : Cysteinyl 129의 관련성 Involvement of Cysteinyl 129

배준성,한태룡 경희대학교 유전공학연구소 1992 遺傳工學論文集 Vol.4 No.-

ATPase activity of RecA protein is believed to be essential for the strand exchange and DNA repair reactions in E. coli. Chemical modification(Kuramitsu et al., Biochemistry. 23. 2363. 1984) and ATP photolabeling(Banks and Sedgwick. Biochemistry, 25, 5882, 1986) experiments suggest that cysteinyl-129 is one of the most probable residues for the binding and hydrolysis of ATP in RecA protein. Site-directed mutagenesis is employed to change cysteinyl-129 to serine and alanine to minimize any structural alterations. Wild type and mutant RecA proteins were purified and examined for ATPase activity. All the purified RecA proteins showed sigmoidal activity shapes as a function of substrate concentration, indicating that RecA catalyzed ATP hydrolysis is cooperative. Both mutant RecAs displayed almost same V_(max) with wild type RecA but much larger S_(1/2) values(l80 μM for Ser. 120 μM for ,A1a) than wild type(78 μM). These results suggest that cysteinyl-129 may involve in the ATP binding rather than ATP hydrolysis. Further experiments on direct ATP binding and strand exchange reactions are in progress.

매립지 침출수내의 Ca^2+, Fe^2+,3+, 휴믹물질 동반제거에 관한 연구

김지태,고명욱,배성렬 漢陽大學校 工學技術硏究所 2002 工學技術論文集 Vol.11 No.-

탄산칼슘(CaCO_3) 결정화 석출과 수산화철(Fe(OH)_3)의 결정화 석출을 위해 반회분식 장치를 이용하였으며, 반응온도는 25±2℃로 유지하였고 교반속도는 40∼80rpm으로 교반하였다. 매립 침출수내에 함유되어져 있는 Ca^2+와 Fe^2+, Fe^3+를 응집 침전물로 결정화한 후, 활성탄에 흡착시켰다. 휴믹물질을 금속 이온 물질과 배위 결합시켜 함께 제거할 수 있었다. 침출수 처리의 적정pH 범위는 9∼10이었고, 약 90%이상의 Ca^2+, 휴믹물질이 동반제거됨을 알 수 있다. 그러나 Fenton 산화처리 이후에 활성탄 흡착에 의한 Fe^2+,3+, 휴믹물질의 동반제거에 있어서 충분한 처리방법이 되지 못함을 관찰할 수 있다. Batch reactor was used in this study for treating CaCO_3 and Fe(OH)_3, temperature was maintained at 25±2℃ and stirring speed was 40∼80rpm. Ionic metals such as Ca^2+, Fe^2+ and Fe^3+ in leachate were precipitated and adsorbed by activated carbon. Subsequently ionic metals and humic substances that combined with Ca^2+, Fe^2+ and Fe^3+ are removed. The removal efficiency of humic substances was varied with pH value. At the pH 9∼10 range in the treated leachate, Ca^2+, humic substances was removed over 90%. but removal of Fe^2+,3+, humic substances didn't show that the efficient treatment was absorbed by activated carbon after Fenton treat.

회분식 반응기에서 ABS 수지의 열분해특성에 관한 연구

김지태,곽현,류한영,배성렬 漢陽大學校 工學技術硏究所 2002 工學技術論文集 Vol.11 No.-

본 연구는 앞으로 폐플라스틱 뿐 아니라 다른 폐기물에도 보편화될 것으로 예상되는 열분해공정을 이용하여 ABS 수지(Acrylonitrile-Butadiene-Styrene resign)에 대해 열분해 실험을 행하였다. 교반기가 달린 회분식 반응기에서 5대범용수지(PS, PP, PE, PVC, ABS)중 전기부품과 자동차 부품 등으로 많이 사용되고 있는 ABS 수지 100g을 400, 420, 440℃ 의 분해온도에서 등온 열분해실험을 행하였다. 대부분 고분자의 열분해 반응은 1차이므로 1차반응으로 가정하고 속도록적 해석과 함께 활성화에너지를 구하였다. 실험변수인 분해온도가 오일, 가스 및 잔류물질의 수율과 오일 생성물의 성분분포에 미치는 영향을 관찰하였다. 분해온도에 따라 약간의 차이가 나긴 하지만 주성분은 styrene, benzenebutanenitrile, ethylbenzene 등의 성분으로 이루어져 있었고, 생성오일의 양은 분해 온도가 높을수록 증가했으며, 부가가치가 큰 styrene 단량체 역시 400℃ 일 경우 32.6wt%였으나 440℃일 경우 45.8wt%까지 크게 증가하였다. Isothermal pyrolysis experiment was performed on ABS resign 100g in batch reactor. The temperature was varied from 400℃ to 440℃ at intervals of 20℃. Because most plastic degradation reaction was first order, it assumed first order and elucidated the kinetics. This was the basis of characteristics analysis of ABS resign degradation mechanism. Also, the effect of temperature on the yield of oil, gas and char product change was observed, and the distribution of oil product components was observed. Main components of oil product were a little difference with degradation temperature, but they consist of styrene, benzenebuttanenitrile, ethylbenzene etc. and their yield increased along with degradation temperature. Particularly, high value added styrene yield 32.6wt% at 400℃ but increased to 45.8wt% at 440℃.

제6차 교육과정에 따른 고등학교 화학Ⅱ 교과서의 STS 내용분석

김정태,이석희,문성배 부산대학교 사범대학 과학교육연구소 2000 科學敎育硏究報 Vol.27 No.-

Science-Technology-Society (STS) educational system has been concerned with a reform in science education as a new direction and goal. The goal of STS education is to develop students who can understand how science, technology, and society are interrelated. and use this knowledge in everyday decision making. In Korea, STS was introduced in the Fifth Curriculum and more emphasized in the Six Curriculum. The major purpose of this study are to examine how many page are alloted to the STS material in each chapters of seven different high school ChemistryⅡ textbooks, compiled in accordance with Sixth Curriculum, to compare and analyze the contents of STS materials by chapters, subject and category of activity, and to check up how many materials relevant to STS are included in those textbooks. 1. In the chapters of those textbooks the STS materials are alloted from 1.2% to 4.2%, on the average 2.7% of all page. This percentage of the STS materials is the less than half of that of NSTA. Trying to approach of STS to questions, reading materials etc, it leaves much to be desired in development of the body of the text. 2. By chapters, 3.8% of the STS materials are included in chapter "Chemical bond and Compound", 3.2% in "Atomic Structure and Periodic", 2.2% in "State and Solution of materials and 1.9% in "Material Science".. We can see that the percentage of STS materials is the highest in "Chemical bond and Compound". 3. STS materials are analyzed by STS topics by Piel, 33.7% of STS materials are the topics on effects of technological developments, 27.5% on environmental problem and utilization of natural resources, 19.6% on human engineering 13.8% on sociology of science, and nothing on population, and space research and national defense. 4. The topics on energy are included in "Chemical Bond and Compound" and "Chemical Reaction" chapter. Issue regarding human engineering, environment problem, and technological developments and their effects are included in "Chemical Bond and Compound". And the topics on sociology of science are mostly explained in "Atomic Structure and Periodic" and "Chemical Reaction". 5. STS materials are analyzed by using SATIS activities. Most of these activities are research studies, case studies, study devices and organized discussions and no role plays.

여성은행원에서의 스트레스 관련요인

정경태,장성실,이강숙,이연경,이동배 大韓産業醫學會 1999 대한직업환경의학회지 Vol.11 No.1

We surveyed 343 female bank clerks to find out associations between stress and a variety of factors including general, menstruation and reproductive characteristics of the participants. Unmarried women composed the majority of younger, lower income and lower education groups than married did. They also showed higher, though not significantly higher, scores for psychosocial well being index(PWI) and the first three items of the stress survey. And married women scored slightly higher only in the fourth item of the stress survey. Among the subgroups of married and unmarried women, many factors contributed to a higher stress score in two or more items of the stress survey: in unmarried women, lower education level, little physical exercise, and large family inhabitants, in contrast married women, higher monthly income and greater working hours were related to higher stress scores. According to the menstruation factors, subgroups with dysmenorrhea or irregular cycle and scanty bleeding volume in unmarried women and subgroups with dysmenorrhea kin married women showed higher stress scores in PWI. In married women, the proportion of those who have been pregnant was 77.2% and the proportion of those who have experienced spontaneous abortion was 24.1%. Those who have ever experienced two or more spontaneous abortion showed hgher, though not statistically significantly higher, scores for PWI. In conclusion, dysmenorrhea was associated with high stress score in two groups. And the other factors related to higher score of PWI were different between unmarred and married women, which should be considered in a management plan for mental health promotion.

olanzapin과 Risperidone의 급성 및 만성 투여기가 흰쥐 전전두피질의 Dopamine 농도에 미치는 영향

문선근,정영철,은홍배,황익근,박태원 大韓神經精神醫學會 2002 신경정신의학 Vol.41 No.1

항정신병약물들이 전전두피질의 세포외 dopamine 농도에 미치는 영향은 이 약물들의 음성 증상에 대한 효과와 관련이 있는 것으로 보고 되고 있다. 따라서 본 연구에서는 최근 국내에서 많이 사용되고 있는 olanzapine과 risperidone을 흰쥐에 급성 및 만성 투여를 한 후, 이들 약물들이 전전두피질의 세포외 dopamine 농도에 미치는 영향을 알아보고자 하였다. 샘플은 생체 내 뇌 미세투석법(in vivo brain microdialysis)을 이용하여 얻었고 샘플내 dopamine의 농도는 전기화학적 검출법(electrochemical detection : ECD)을 사용하는 고압액체크로마토그라피(high pressure liquid chromatography : HPLC)로 측정하였다. 그 결과는 다음과 같다. 1) Olanzapine과 risperidone의 급성 투여는 전전두피질 부취의 세포외 dopamine 농도를 증가시켰으며 증가의 정도는 용량 의존적이었다. 2) Olanzapine과 risperidone의 급성 투여에 의해 전전두피질 부위에 나타난 세포외 dopamine 농도의 최고치는 두 약물간에 유의한 차이가 없었다. 3) Olanzapine과 risperidone의 만성 투여는 전전두피질 부위의 세포외 dopamine 농도를 증가시켰으나 그 증가의 정도가 급성 투여에 비해 모두 감소하는 내성 현상이 보였다. 4) Olanzapine과 risperidone의 만성 투여에 의해 전전두피질 부위에 나타나는 세포외 dopamine 농도의 최고치는 olanzapine과 risperidone에 비해 유의하게 높았다. 이상의 결과들은 Olanzapine과 risperidone의 음성 증상에 대한 임상적 효과가 이들 약물이 전전두피질의 세포외 dopamine 농도를 증가시키는 효과와 관견이 있음을 제시한다. Object : It is reported that the effect of antipsychotics on the extracellular dopamine levels in the prefrontal cortex is related to the their effect on the negative symptoms. Therefore, we investigated the acute and chronic effects of olanzapine and risperidone on the extracellular dopamine concentrations in the prefrontal cortex of rat. Samples were obtained using in vivo brain microdialysis. Method : Dopamine levels in the samples were measured by high pressure liquid chromatography with electrochemical detection. Results : 1) Both the acute treatment of olanzapine and risperidone increased the extracellular dopamine concentrations in the prefrontal cortex, dose-dependently. 2) There was a no significant difference in the maximal change of the extracellular dopamine concentrations in the prefrontal cortex induced by the acute treatment of olanzapine and risperidone. 3) Both the chronic treatment of olanzapine and risperidone also increased the extracellular dopamine concentrations in the prefrontal cortex, but they showed the tolerance effect that the degree of increase was smaller than that of the acute treatment. 4) As for the maximal changes of the extracellular dopamine concentrations in the prefrontal cortex induced by the chronic treatment of planzapine and risperidone, the effect of the former was greater than that of the latter. Conclusion : These results suggest that the effects of olanzapine and risperdone on the negative symptoms are related to the increased extracellular dopamine concentrations in the prefrontal cortex induced by these drugs.

정수공정에서 이취미물질 제거에 관한 연구

김지태,한명애,곽현,배성렬 漢陽大學校 工學技術硏究所 2000 工學技術論文集 Vol.9 No.1

이취미물질중에서 페놀, Geosmin, 2-MIB를 선정하여 응집제(PACS)와 흡착제(PAC) 및 산화제(Cl2, ClO2)로 처리하였을 때 제거율을 알아보았다. 페놀의 경우 이산화염소(ClO2)와 분말활성탄(PAC)으로 처리하였을 때 제거효율이 높았고, Geosmin과 2-MIB는 분말활성탄(PAC)으로 처리하였을 때 제거효율이 높았다. 그러나 페놀, Geosmin, 2-MIB 모두 응집제(PACS), 염소(Cl2)로 처리하였을 경우에는 제거효율이 거의 없음을 알 수 있었다. The removal ratio of phenol, geosmin, and 2-MIB selected in odor and taste causing materials was investigated, when water was treated with coagulant(PACS), adsorbent(PAC), and oxidants(Cl2, ClO2). Phenol was removed at a relatively higher rate by the treatment with CIO2 and PAC(Powder Activated Carbon). The other side, geosmin and 2-MIB were removed at a higher rate by the treatment with PAC. But it was found that the treatment with coagulant(PACS) and chlorine(Cl2) for the removal of phenol, geosmin and 2-MIB was little removal efficiency.