소프트 베이킹 온도가 용액기반 Zn-Sn-O 박막 트랜지스터의 전기적 특성에 미치는 영향

이재원,조원주,Lee, Jae-Won,Cho, Won-Ju 한국전기전자재료학회 2016 전기전자재료학회논문지 Vol.29 No.1

In this study, the effects of soft baking temperature on the solution derived ZTO (Zn-Sn-O) TFTs (thin-film transistors) as a In-free oxide semiconductor were investigated. In spite of the same hard baking at high temperature($600^{\circ}C$), the electrical properties of ZTO TFT was greatly changed by a small difference in soft baking temperature($180{\sim}250^{\circ}C$). The performance of TFT was deteriorated as the soft baking temperature increased. Therefore, it is important to remove the water-related defects well as organic impurities from the ZTO films during soft baking for fabrication of solution-derived high performance of TFTs.

자연기흉의 개흉술 적응과 수술성적에 관한 연구

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.

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.

유로퓸 고용(固溶) 우라늄산화물(酸化物)의 황화반응(黃化反應) 특성(特性)

이재원,박근일,이정원,Lee, Jae Won,Park, Geun Il,Lee, Jung Won 한국자원리싸이클링학회 2013 자원리싸이클링 Vol.22 No.3

Sulfurization reaction characteristics of $Eu_2O_3$, uranium oxides($UO_2$, $U_3O_8$), mixture of $Eu_2O_3$ and uranium oxides, Eu-doped uranium oxides($(U,Eu)O_2$, $(U,Eu)_3O_8$), and phase-separated products prepared by HOX (High temperature OXidation) of $(U,Eu)O_2$ were investigated in the temperature range from 400 to $800^{\circ}C$. Only $Eu_2O_3$ in the mixture of $Eu_2O_3$ and uranium oxides was converted into $Eu_3S_4$ by sulfurization reaction at $450^{\circ}C$ without reaction between them. Sulfurization reaction behavior of $(U,Eu)_3O_8$ and $(U,Eu)O_2$ up to $600^{\circ}C$ was similar to $U_3O_8$ and $UO_2$, respectively, while they were sulfurized into Eu-rich $(U,Eu)S_x$ and ${\alpha}-US_2$ at $800^{\circ}C$. In the sulfurization of RE-rich $(U,Eu)_4O_9$ and $U_3O_8$ prepared by high temperature oxidation, it was confirmed that RE-rich $(U,Eu)S_x$ and UOS phases were formed at $600^{\circ}C$. For Eu-rich $(U,Eu)O_2$ and $UO_2$ prepared by reduction of HOX products, it was identified that Eu-rich (U,Eu)OS was formed at $450^{\circ}C$ by sulfurization of Eu-rich $(U,Eu)O_2$, while $UO_2$ remained unreacted.

인위적 진화의 세계

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.

다발성 원발성 식도종양 1례 보

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.

좌측 폐동맥결손을 동반한 활로 사징증의 수술요법

이재원,노준량,Lee, Jae-Won,No, Jun-Ryang 대한흉부심장혈관외과학회 1985 Journal of Chest Surgery (J Chest Surg) Vol.18 No.2

Despite low mortality and excellent long-term results after repair of Tetralogy of Fallot, certain associated anomaly such as single pulmonary artery continues to be told to have a high operative mortality and morbidity, and there is still some debate on appropriate surgical intervention. During the 4 year period from 1981 to 1984, surgical repair was performed on 5 patients with tetralogy of Fallot and congenital [4 cases] or acquired [1 case] absence of left pulmonary artery. Previous left pneumonectomy had been performed in the patient with acquired absence of a pulmonary artery. Transannular patch or RVOT patch alone with or without pulmonic valvotomy was used with some modifications to reduce pulmonic insufficiency in individual patient. In contrast with previous reports, all patients survived operation and have exhibited marked symptomatic improvement without pulmonic valve insertion nor valved conduit.

좌심방 양심실 연결증 [DOLA]

이재원,서경필,Lee, Jae-Won,Seo, Gyeong-Pil 대한흉부심장혈관외과학회 1985 Journal of Chest Surgery (J Chest Surg) Vol.18 No.2

The case of a patient with abnormal position of the atrial septum resulting in a left atrium with two atrioventricular valves and a disconnected right atrium is presented with review of related articles. Anatomic details showed atrial situs solitus and a left sided cardiac apex. The right atrium received both venae cavae and a coronary sinus. No AV valve was found in the right atrium, and the floor of this chamber was placed above the posterior wall of right ventricular chamber. The atrial septum with secundum ASD was displaced to right anteriorly at its lower portion and inserted to right of tricuspid annulus. The tricuspid and mitral valve configuration was that of so-called partial ECD, i.e. mitral cleft with large anterior mitral leaflets. The ventricular septum was intact and both ventricular chambers were equally well developed with normal relationships. Surgical repair of this anomaly was performed by resecting the abnormally positioned lower part of the atrial septum, repairing the cleft of the anterior mitral leaflet, and septating the atrium for diverting the systemic and pulmonary venous blood to RV and LV, respectively.

연속성 충격소음의 인지에 관여하는 영향인자

이재원,신성환,Lee, Jae-Won,Shin, Sung-Hwan 한국음향학회 2016 한국음향학회지 Vol.35 No.3

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.

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.