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이재원(Lee, Jae-Won) 동남어문학회 2012 동남어문논집 Vol.1 No.33
This writing is an attempt to examine the logic behind artificial evolution in the early writing of Lee Kwang-su. According to his account, human civilization is the result of artificial evolution. By defining human personality as abilities of artificial evolution, he tried to change the way of basic understanding human being. He presented in the existence which comes true the essence of the human being which is such the civilized person. At logic of his artificial evolution, the problem of civilization was converted with creation of individual all who have the desire toward civilization. He looked at the situation and position of korean society from the viewpoint of world history and admitted the differential temporality which is dividing between korean society and western civilization. The Lee’s ideas of artificial evolution serves as alternative way to jump over the differential temporality. In the early writing, the methods of the artificial evolution are reform of education system, reading literature and revolution. Through this method, Lee tried to prepare ‘Civilized people’ and ‘shared commitment to social values’ that are practical foundation of artificial evolution.
사상의학초본권(四象醫學草本卷)과 동의수세보원(東醫壽世保元)에 나타난 이제마(李濟馬)의 사상의학관(四象醫學觀)에 관한 비교고찰(比較考察)
이재원,송일병,Lee, Jae-won,Song, Il-byung 사상체질의학회 1999 사상체질의학회지 Vol.11 No.2
Purpose: This studied by the comparative method the view of Lee Je-ma's Constitutional Medicine expressed Sasang ChobonGuen and Dongyi Suse Bowon. 2. Method: I studied the view of Lee Je-ma's Constitutional Medicine classified broadly 'General view of life' and 'Constitutional view of life expressed SangChonbonGuen and Dongyi Suse Bowon. 3. Results & Conclusion: Sasang ChobonGuen gathered 'Seongmoung-Ron', 'Sadan-Ron', 'Hwakchoong-Ron', 'Byeonjeong-Ron' and a part of 'Jangbu-Ron' of Dongyi Suse Bowon. It is insufficient the explanation of 'CheonGi', but the fundamental spirit is same. The study of Soyangin is done earlier, the studies of Soeumin, Taeumin, Taeyangin is done later.
Ti-15V-3Al합금의 시효거동과 열처리에 따른 고온 기계적 특성
이재원,이백희,이규환,김영도,Lee Jae Won,Lee Back-Hee,Lee Kyu Hwan,Kim Young Do 한국재료학회 2004 한국재료학회지 Vol.14 No.1
Titanium alloys are the one of promising candidate materials for medium high temperature parts in the aircraft, automobile, petrochemistry and electrochemistry because of their high strength with low density in medium high temperature. In this study, the effects of aging and heat treatments on the mechanical properties of Ti-15-3 alloy in medium high temperature, which was $400^{\circ}C$, were studied. Solid solution treatment was performed at $8000^{\circ}C$ of $\beta$ phase region for 1 h and the alloy was quenched in water. The alloy was aged at $5000^{\circ}C$ of $\alpha$ and $\beta$ two-phase region for 1, 2, 4, 8, ... and 100 h to increase the mechanical property. The $\beta$ single phase was observed at all parts of specimens in Ti-15-3 alloy after ST. As the aging at $500^{\circ}C$, fine precipitates of a phase was generated from matrix of $\beta$ phase and the microstructure was consisted of weaving structure such as Widmanstiitten a phase. The most suitable aging time is 24h in$ 400^{\circ}C$. At this time, strength is 1164 MPa and elongation is about 12%. In room temperature, elongation of Ti-15-3 alloy aged at $500^{\circ}C$ for 16 h is poor (=3%) in spite of high tensile strength (1458 MPa).
Lovastatin을 생산하는 식용버섯 선발과 HMG-CoA reductase 저해 효과
이재원,이수민,곽기섭,이지윤,최인규,Lee Jae-Won,Lee Soo-Min,Gwak Ki-Seob,Lee Ji-Yoon,Choi In-Gyu 한국미생물학회 2006 미생물학회지 Vol.42 No.2
국내에서 식용버섯으로 이용되고 있는 8종 균주의 자실체와 균사체로부터 콜레스테롤 합성을 저해하는 lovastatin 생산과 고지혈증 억제활성을 탐색하였다. TLC 분석으로 lovastatin생산 유무를 검색한 결과 자실체와 균사체의 추출물에 대해 Rf값이 표준물질콰 같은 약 0.46에서 뚜렷한 밴드가 형성됨을 확인하였다. 자실체로부터 lovastatin 추출을 위한 용매로는 water/acetonitrile/methanol (5:2.5:2.5)을 사용하였을 매 가장 효과적인 lovastatin 생산량을 보였다. Lovastatin 생산량은 자실체 중에서는 Pleurotus ostreatus가 0.98 mg/g (dry biomass)으로 가장 높은 생산량을 나타냈고 균사체 배양액 추출물에 대해서도 P. ostreatus가 21.90 mg/L로 높은 생산량을 나타냈다. 3-Hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase 저해활성에서는 자실체에서 P ostreatus가 67.8%, 균사체에서 P. ostreatus와Laetiporus sulphureus가 각각 37.2%, 29.1%의 저해활성을 보였다. L. sulphureus는 lovastatin 생산량에 비해 높은 저해활성을 나타내서 lovastatin 이외의 다른 고지혈증 억제물질을 GC/MS로 분석한 결과 대사산물로 분비되는 식물성 sterol 물질인 campesterol과 gamma-sitosterol이 검출되었다. This research was performed to determine the production of lovastatin and its HMG-CoA reductase activity produced by fruit bodies and mycelial liquid cultures of domestic edible mushrooms (8 fungal strains). By deter-mining TLC analysis for the confirmation of the presence of lovastatin, all the extracts from fruit bodies and mycelial liquid culture showed same Rf value (0.46), whick was identical to that of the standard lovastatin. In order to extract lovastatin from fruit body, the mixture of water/acetonitrile/methanol was chosen as the most effective solvent. Extracts from fruit body and mycelial liquid culture of pleurotus ostreatus produced the high-est lovastatin 0.98 mg/g based on dry biomass, and 21.90 mg/L, respectively. In the inhibition rate of 3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase, the highest was obtained in P. ostreatus as 67.8% among fruit bodies, and the rates of mycelial liquid culture extracts from P. ostreatus and Laetiporus sulphureus were 37.2% and 29.1%, respectively. Unusually L. sulphureus showed high inhibition rate with low content of lovastatin due to the contribution of campesterol and gamma-sitosterol with hypocholesterolemic activity as metabolites.
2009 개정 교육과정에 따른 중학교 과학 교사용 지도서에 나타난 교과교육학 지식(PCK) 요소 분석
이재원,류고운,노태희,Lee, Jaewon,Ryu, Goeun,Noh, Taehee 대한화학회 2018 대한화학회지 Vol.62 No.5
이 연구에서는 2009 개정 교육과정에 따른 중학교 과학 교사용 지도서의 화학 영역 단원에 나타난 PCK 요소를 분석하였다. 분석 결과 PCK의 하위 요소 중 주제-특이적 전략, 수직 연계, 수업 목표는 대부분의 교사용 지도서에서 체계적으로 다루고 있었다. 그러나 교과-특이적 전략, 평가 방법, 교육과정 변화는 주로 총론에서만 다루고 있었다. 실험 및 탐구, 평가 문항, 평가 측면은 제시된 내용이나 형태에서 구성주의적 접근이 미흡하였다. 수평 연계와 학생에 관한 지식은 관련 내용이 부족하거나 단순히 목록만 제시되어 있었다. 개념 및 이론은 교사용 지도서에서 가장 큰 비율을 차지하고 있었으나 적정 수준을 벗어나는 내용을 일부 포함하고 있었다. 연구 결과를 바탕으로 교사용 지도서 개발을 위한 시사점을 논의하였다. In this study, we investigated the characteristics of the PCK components in the chemistry units of middle school science teacher's guidebooks developed under the 2009 Revised National Curriculum. The analysis of the results revealed that the sub-components of topic-specific strategies, vertical articulation, and lesson objectives were systematically handled in most teacher's guidebooks. However, subject-specific strategies, assessment methods, and curricular changes were mainly dealt with only in the general guidelines. Experiments and inquiries, assessment questions, and assessment dimensions were lack of constructivist approaches in the aspect of presented contents or forms. Horizontal articulation and knowledge of students were either lacked in relevant content or presented in the form of simple presentation. Concepts and theories accounted for the largest proportion of teachers' guidebooks, but some of them were beyond appropriate levels. On the bases of the results, the implications for the development of the teacher's guidebooks are discussed.
이재원,신성환,Lee, Jae-Won,Shin, Sung-Hwan 한국음향학회 2016 韓國音響學會誌 Vol.35 No.3
Most of noises from cars or home appliances accompany successive impulsive noise due to repeated operation. A human auditory system is able to perceive the successive impulsive noise as either a set of independent noise or amplitude modulated noise according to its occurrence period. This study is to identify main influence factors on understanding of impulsive characteristics and find most appropriate sound quality metrics to express the successive impulsive noise. To do this, the successive impulsive noises were designed and utilized to perform a listening test for identifying conditions where successive impulsive noise can be recognized to have impulsive characteristics. These results were analyzed with sound quality metrics such as loudness, fluctuation strength, and roughness in order to compare the subjective results with the objective results. Consequently, the results revealed that the successive impulsive noise exhibits impulsive characteristics when its occurrence frequency is less than 50 Hz. It was also observed that roughness and fluctuation strength results are not applicable to express the successive impulsive noise because they heavily depend on the amplitude modulation characteristics. On the other hand, loudness results are considered to be useful as an evaluation factor of the successive impulsive noise through the use of loudness limen because it does not depend on the amplitude modulation characteristics. 자동차나 가전제품에서 발생하는 소음의 대부분은 연속성 충격소음을 동반한다. 인간 청각은 반복적 충격소음에 대하여 그 반복 주기에 따라 독립된 충격음의 집합 또는 이어진 음으로 느낄 수 있다. 본 연구에서는 연속성 충격소음의 인지에 관여하는 영향인자를 파악하고, 연속성 충격소음을 표현하기에 가장 적합한 음질분석 방법을 찾고자 하였다. 이를 위하여 연속성 충격신호를 설계하고, 연속성 충격소음이 충격음 특성을 나타내는 조건을 탐색하는 청음평가를 수행하였다. 그리고 이러한 청음평가 결과를 라우드니스, 변동강도, 러프니스 방법으로 분석하고 비교하였다. 결과적으로 연속성 충격소음은 50 Hz보다 낮은 반복주기를 가질 때부터 충격음 특성을 나타내는 것으로 확인되었다. 음질인자 중 변동강도와 러프니스 값은 연속성 충격소음의 진폭변조특성에 크게 의존하기 때문에 연속성 충격소음을 표현하는데 어려움이 있다. 반면에 라우드니스 값은 연속성 충격소음의 진폭변조특성에 의존하지 않으며, 라우드니스 변화 역치로서 평가인자 개발에 효용성이 있을 것으로 판단된다.
이재원,박인춘,최철민,김영철,Lee, Jaewon,Park, Inchun,Choi, Cheolmin,Kim, Young-chul 한국항공운항학회 2016 한국항공운항학회지 Vol.24 No.1
This study deals with the light environments and weather conditions affecting to the night illuminance over the Korean peninsula. The experiment was executed to analyze the effects on the illuminance at separate sites(Gyeryong and Pilseung) considering the different light environments. The analysis was applied to illuminance measurement from the lightmeter, which was developed for the IYA(International Year of Astronomy) 2009, in order to observe the illuminance of areal networks. The weather observations, such as the cloud cover and visibility, were used to understand the quantitative influence of the illuminance to the selected sites. The results show that the illuminance measurements are significantly different from data of the operational illuminance prediction model which simply applies extinction effect for the illuminance. It shows that these differences are caused by the light environments and weather conditions for each site. Therefore, it can be confirmed that the night illuminance is the output of interaction with the characteristics of light for luminous sources.
이재원,김근호,Lee, Jae-Won,Kim, Geun-Ho 대한흉부심장혈관외과학회 1987 Journal of Chest Surgery (J Chest Surg) Vol.20 No.1
The records of 268 patients, who were diagnosed as spontaneous pneumothorax during the period 1975 to 1984, treated at the department of thoracic and cardiovascular surgery, Hanyang University Hospital, were reviewed retrospectively to evaluate the effect of surgical intervention on each indications. Of these,.61 patients [22.8%] were taken operation to treat the pneumothorax after closed thoracostomy. We have classified the 61 patients to evaluate the therapeutic effect on each indications. And the therapeutic effect is based on the chest tube indwelling days. The results were as follows: 1. The chest tube indwelling days of the group who were taken closed thoracostomy only was average 14.13*9.17 days [range 5-66 days], and that of the group who were finally taken the thoracotomy after closed thoracostomy was 21.85*12.30 days [range 5-55 days]. 2. The indications of thoractomy were thoracoscopic findings, recurrence and continuous air leakage. 3. The chest tube indwelling day of the group who was taken thoracotomy by thoracoscopic findings was average 11.67*6.51 day, that was relatively short compared to those of the other groups. 4. The continuous air leakage group after closed thoracostomy was subdivided into three subgroups, continuous air leakage in 1st attack, thoracoscopic findings in 1st attack, and recurrence. 5. Of these, the chest tube indwelling day of the subgroup, who was taken operation by thoracoscopic findings, was 21.33e8.26, that was relatively short compared with those of the other subgroups. We use the thoracoscope as excellent diagnostic tool to detect the operation indication in the spontaneous pneumothorax patients. And we gain the benefits to shorten the chest tube indwelling days and admission days, and also to protect the recurrence.
이재원,강정호,지행옥,Lee, Jae-Won,Gang, Jeong-Ho,Ji, Haeng-Ok 대한흉부심장혈관외과학회 1987 Journal of Chest Surgery (J Chest Surg) Vol.20 No.2
A 51 year-old male was admitted with the chief complaints of swallowing difficulty and pain on neck and upper chest for 2 months prior to admission: He was taken biopsy under esophagoscopy, and the result was squamous cell carcinoma. Preoperatively we studied the esophagogram and chest CT. On these, we found the main appreciable mass at midesophagus easily. But, we missed the upper cervical unexpected mass. So we performed the esophagectomy and lymph node dissection from upper clavicle level to the esophagogastric junction by thoracic approach as wide as possible, and cervical esophagostomy and feeding gastrostomy also. At that evening we reviewed the studied films in detail, and we found another mass lesion at C4-C6 level of cervical esophagus. We performed the 2nd operation e.g. cervical esophagectomy on next morning without hesitation. Between these two masses, there was almostly normally looking skip area grossly. The squamous cell carcinoma of the esophagus could be multicentric in character and may have skip area. But, we heard little reports until now. The two masses could be different in origin or be same probably by submucosal spreading. Anyway, it was an alarming case to the surgeon not to neglect the another possible lesions in squamous cell type. Postoperative course was uneventful, he took G-tube feeding with no problems on 7th postoperative day. Now he took the postoperative irradiation at out patient department.