韓國 行政境域의 接觸性 硏究

李聖學 慶北大學校 1980 論文集 Vol.30 No.-

1. The administrative boundary of Korea in largely established by its topograpical condition, and its social background. However, its administrative districts are analogous to the hexagonal region model of Christraller and Lo¨sch's central place theory as the mean contact number of boundaries is 5 to 6. 2. The correlation coefficient between the contact number of the administrative boundaries and an index of boundary flexure, an index of shape, and area size which are concerned with the contact number is 0.5 respectively on the average. In boundary, and a rank of area size is about 0.8, we find that it applies to the so called "Magnetic Domain Theory". 3. I'll explain later the correlation between the contact of administrative boundary and a transportation sphere, a cultural sphere, and an economic sphere respectively.

직접인장 모드에 의한 신·구콘크리트의 부착강도 특성 분석

이봉학,홍창우,김동호,김성환 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

본 연구에서는 부착 특성평가를 위하여 코어깊이, 덧씌우기 두께, 기존 콘크리트와 덧씌우기 재료의 탄성계수비, Steel Disk의 두께를 변화하여 유한요소해석을 실시하였다. 이때 부착면에 발생한 응력의 특성을 비교하여 응력집중계수를 산출하여 최적의 직접인장시험 기준을 마련하고자 하였다. 제안된 실험 방법의 검증을 위하여 보통콘크리트와 초속경 라텍스 개질 콘크리트를 사용하여 실내실험을 실시하였다. 이 두 재료의 부착강도특성을 분석하기 위해서 보통콘크리트와 라텍스 개질 콘크리트로 구성된 복합콘크리트 슬래브를 제작하여 직접인발실험(Pull-out test)을 실시하였다. 주요 실험변수로써 코어직경, 코어깊이, 부착면의 수분상태에 따른 초속경 라텍스 개질 콘크리트의 부착강도 특성을 분석하였다. Significant improvements in the bond strength between new and existing concretes can be achieved through the modification of the new concrete by latex modification. But, no test method has been adopted as a standard to measure the bond strength between the concretes used to repair and the substrate being repaired. The performance of old and the new concretes construction depends upon bond strength between old and the new concretes. Current adhesive strength measurement method ignores the effect of stress concentration by shape of specimens. Therefore, this research calculated stress concentration coefficient using finite element analysis and direction tensile strength test (pull-off test). The result showed that the minimum required core depth was 2.5㎝. Elastic modulus and overlay thickness did not affect to stress concentration.

Phage Display 기법을 이용한 B형 간염 바이러스 Polymerase의 Rnase H 활성을 억제하는 인간 단세포군 항체의개발

이성락,송은경,정영주,이영이,김익중,최인학,박세광 Official Journal of the Korean society for immunol 2004 Immune Network Vol.4 No.1

유한요소해석을 이용한 현장 덧씌우기 콘크리트의 부착강도 평가 방법 제안

이봉학,홍창우,이주형,김성환 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B

Significant improvements in bond strength between new and existing concrete can be achieved through the modification of the new concrete by latex modification. But, no test method has been adopted as a standard to measure the bond strength between the concrete used to repair and the substrate being repaired. The performance of old and the new concrete construction defends upon band strength between old and the new concrete. Current adhesion strength measurement method is inaccurate method that ignore effect of stress concentration by shape of specimens. Therefore, this research calculates stress concentration coefficient using finite element analysis and direction tensile strength test (pull-off test). The result shows that the required core depth is 2.5cm. Elastic modulus and overlay thickness do not influence in stress concentration.

난소절제후 Estrogen을 투여한 흰쥐 대동맥에서 Protein Kinase C-α와 Fas 발현의 변화

이왕수,이상엽,안지현,송영빈,김학진,이광재,유재격,김상욱,김태호,김치정,류왕성 중앙대학교 의과대학 의과학연구소 2001 中央醫大誌 Vol.26 No.3

Estrogen is believed to decrease coronary artery disease. Protein kinase C-α(PKCα)appear to be important in signal conduction pathways. Estrogen treatment increases catalytic activity of PKCα,and activation of PKCαcan modulate estrogen receptor levels and responsiveness. And it was reported that activation of PKC can protect cells from apoptosis induced by Fas ligation. But the beneficial effect of estrogen on PKCαwas not clearly demonstrated. The objective of this study was to evaluate the role of PKCαafter ovariectomy and estrogen therapy in rat aorta. The results were summarized as below: 1. The significant pathological changes were not observed in the rat aorta irrelevant to ovariectomy and estrogen therapy. 2. The expression of Fas was decreased in the aorta of estrogen-treated rats than that of ovariectomized rats without estrogen therapy. 3. Increased expression of PKCαwas more marked in the aprta of estrogen-treated rats than that of ovariectomized rat without estrogen therapy. In conclusion,PKCαmay be important in signal conduation pathway on the effect of estrogen. Activation of PKCαby estrogen reduced Fas expression, suggesting that PKCαactivation may play a role in protection against atherasclerosis. Further studies are needed to elucidate the role of PKCαafter estrogen therapy.

韓國 行政區域名의 歷史 地理學的 硏究 : 「洲」에 對하여 A case of "Ju"(州)

李聖學 慶北大學校 1981 論文集 Vol.32 No.-

1) The character of district name of Korea, "Ju(州)", was different according to the times and regions, that is, "Ju(州)" of Silla(新羅) was a dualistic character of the district names such as "Do"(道) or "Kun"(郡). And "Ju" of "Koryo"(高麗) didn't have "Do"(道) system but had "Kun"(郡) system. Furthermore, "Kun"(郡) system diversed. "Ju" of "Yi" dynasty(朝鮮) was not used as the district-name but as place-name which residents were more than "Mok-Sa"(牧使) rank. So, the use of "Ju(州)" in the end of the region-name reflects the character of history. 2) The variation of the Korean district name is due to the character of society rather than of location. the relative place of the kings household and a meritorious retainer was elevated, meanwhile, the relative place of a traitor was demoted. And, when the district name was changed, the place-name, generally, was changed, too.

韓國古邑의 置廢 및 名號陞降 : 變遷攷

李聖學 경북대학교 사회과학대학 1984 社會科學 Vol.3 No.-

1. The old towns (Eub)in korea were devided into Gyeong(京), Bu(府), Ju(州), Gun(郡) and Hyeon(縣). Their characteristics were changed according to the period. The Eub(邑) can be classified to three types: the Large Eub(大邑) was higher than Ju(州), Gun(郡) was Middle Eub(中邑) and Hyeon(縣) was Small Eub(小邑). Generally, Large Eub(大邑) has been developed to city, Gun Eub(郡邑) has been the seat of Gun(郡) offices and Hyeon Eub(縣邑) has been the seat of Eub (邑)or Myeon(面) offices. 2. The change of old towns has an important being on the social characteristics to the geographical ones. In many cases, Eub(邑) which was related with the royal family and meritorious retainer was rasised, but a place noted in connected with a rebellious retainer and criminal was degraded in the status. 3. The change of district name was usually concomitant with the change of place name. Therefore place name of same place was changed according to the period.

지방척수수막류 14례의 임상 분석 : Clinical Analysis of 14 Cases

이정호,신규만,김명현,송준혁,박향권,김성학,박동빈 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.6

Lipomyelomeningocele is the most common malformation leading to spinal cord tethering. Nonetheless, these lesion continues to pose a challenge in patient management. The purpose of this study was to identify the clinical feature, candidate for surgical repair, and outcome of lipomyelomeningocele in young children and adults. We studied the magnetic resonance images and/or lumbar myelo-CT of lipomyelomeningocele performed between January 1987 and September 1995 at our institutions and reviewed the pertinent medical records and radiologic studies to determine clinical feature, surgical candidate, and outcomes of these patients. Of the 14 cases(11 female and 3 males) studied, the most common factor that caused these patients to seek help was the cosmetic effect of the mass on their back, followed by urinary incontinence, and weakness of lower extremities. The patients' age ranged from 2 months to 21 years(mean, 5.0 years). All the patients underwent immediate surgical management that consisted of removal of lipoma, untethering of the cord, and complete dural sac repair. Follow up for these patients ranged from 6 to 82 months(median, 54 mo). None of the patients that underwent surgical correction before the emergence of neurological deficit had ever developed neurological deficits at the end of the follow up. However a few of the patients, despite presented with neurological deficits or urinary incontinence at the time of surgery, improved significantly. In conclusion, early detection and prophylactic surgery is imperative to prevent permanent neurological deficits and urinary dysfunction.

관상동맥 시술 도중 발생한 좌주간부 관상동맥 박리에 대한 스텐트 삽입 치료의 단장기 임상 결과 : acute and long-term results

이세환,이승환,홍명기,김영학,이철환,한기훈,송종민,강덕현,송재관,김재중,박성욱,박승정 대한내과학회 2004 대한내과학회지 Vol.66 No.6

목적 : 심도자 사용 시술과 관련된 좌주간부 관상동맥박리에 대한 적절한 치료는 아직 확실히 정립되지 않은 상태이다. 이에 본 연구는 좌주간부 관상동맥 박리에 대한 스텐트 삽입술의 단장기 임상결과를 후향적으로 분석하였다. 방법 : 좌주간부 관상동맥 박리에 대한 치료로 즉각적인 스텐트 삽입술을 시행하는 것이 안전하고 효과적인 방법임을 가설하였고, 이러한 즉각적인 스텐트 삽입을 시행한 10명의 환자를 대상으로 단장기적 임상경과를 의무기록 고찰과 전화 면담을 통해서 평가하였다. 결과 : 전체 환자 모두 처음부터 좌주간부 관상동맥에 유의한 협착을 가진 환자는 없었으며, 8명의 환자는 심도자의 조작으로 인한 박리가 발생한 경우였고(진단적 혈관 조영술 중에 3명, 유도 도자 조작 중에 5명), 나머지 2명은 다른 병변에 스텐트 삽입시술을 하는 중에 박리가 발생하였다. 이 10명의 환자에서 모두 즉각적인 스텐트 삽입술이 시행되었고, 4명의 환자에서 시술 도중 혈압 저하로 Intra-aortic Ballon Pump (IABP)를 장착하였다. 모든 환자에서 성공적으로 스텐트가 삽입되었고, 병원내 사망은 1명도 없었다. 6개월 추적 관상동맥 조영술은 8명의 환자에서 시행되었다. 혈관 조영상의 재협착(직경 협착 50% 이상)은 8명 모두에게서 관찰되지 않았으며, 퇴원 후 평균 31±25개월의 추적관찰 결과 주요 심장사건은 1건도 발생하지 않았다. 결론 : 비록 대상 환자가 적은 연구였지만 좌주간부 관상동맥 박리에 대한 스텐트 삽입술은 기술적으로 안전하고 빠르게 시행 할 수 있으며, 훌륭한 단장기적인 치료 효과를 보여준다. Background : The optimal treatment of patients with left main coronary artery (LMCA) dissection during catheter-based procedure remains uncertain. We retrospectively analyzed the acute and long-term results of bail-out stenting for LMCA dissection. Methods : In cases with significant LMCA dissection occurring during catheter-based procedure, prompt stent implantation may be safe and associated with favorable clinical outcome. We evaluated the acute and long-term results of bail-out stenting for LMCA dissection occurring during catheter-bases procedure in 1- patients. Results : Initially, there was significant stenosis of LMCA segment in these patients. Catheter-induced dissection occurred in 8 patients (during diagnostic angiography in 3 patients and guiding catheter manipulation in 5 patients). Two patients suffered dissection in the setting of stent deployment in other vessels. Therefore, bail-out stenting LMCA dissection was performed in a total of 10 patients. In 4 patients, hypotension developed and intra-aortic balloon pump was placed during procedure. Stents were successfully deployed in all patients. There was no in-hospital mortality. Six-month angiographic follow-up was performed in 8 patients. Angiographic restenosis(diameter stenosis 50%) was not observed in all patients at follow-up study. During a mean follow-up of 31±25 months after hospital discharge, there was no major adverse cardiac event (death, myocardial infarction, and target lesion revascularization). Conclusion : Bail-out LMCA stenting is technically feasible, and showed good acute and long-term results in a small series of patients.

朝鮮時代 行政區域制의 歷史地理性 : 時代的 地域特性

李聖學 慶北大學校 1983 論文集 Vol.36 No.-

1) The administrative district system of Josun(朝鮮) established in Taejong(太宗) 13th year (A.D. 1413), which had not been nearly changed in its basic system for about 480 years until the eight province (Do : 道) system was abolished in Gojong(高宗) 32nd year (A.D. 1895). 2) The administrative district system of Josun(朝鮮) was devided into eight provinces (Do:道) besides a independent province, Hanseong-bu(漢城府) including a capital. They had jurisdiction horizantaly over 330 districts such a Bu(府), Dae-Dohobu(大都護府), Mok(牧), Dohobu(都護府), Kun(郡), Hyun(縣) 3) The size(in productive land and population) of districts was generally related to district names, and its relationship was closer in the latter period of Josun(朝鮮) than the former period. 4) The change of district names was partly due to historical change of geography, but mainly due to social change. 5) The special administrative districts of Josun(朝鮮), Bugok(部曲), Hyang(鄕), and So(所) was reorganized to Hyun(縣) or Chon(村) in the latter period of Josun(朝鮮), and so they were almost abolished.