선천 백내장에서 백내장 제거술 및 일차 인공수정체 삽입술 후의 사시 발생에 영향을 주는 인자 비교

김상현,김완수,이수정,Sang Hyun Kim,Wan Soo Kim,Soo Jung Lee 대한안과학회 2011 대한안과학회지 Vol.52 No.3

Purpose: To evaluate factors associated with the development of strabismus after cataract extraction and primary intraocular lens implantation. Methods: Medical records of 80 patients who had undergone cataract extraction with primary intraocular lens implantation between 6 months and 21 years of age from March 1993 to March 2008 were reviewed. Nine patients (11 eyes) with strabismus before cataract surgery were excluded. Patients were divided into 2 groups; patients with congenital bilateral cataracts (43 patients, 86 eyes) or patients with unilateral cataracts (28 patients, 28 eyes). Data were collected on age at cataract surgery, pre and post-cataract extraction visual acuity, interocular visual acuity differences, nystagmus, operation method, and the existence of associated other ocular diseases to evaluate the association of the onset of strabismus and after cataract. Results: Factors statistically significantly associated with the development of strabismus include presence of nystagmus in bilateral cataracts and postoperative visual acuity differences > 0.3 in unilateral cataracts. A post-cataract extraction mean visual acuity ≤ 0.2 and preservation of posterior capsule were significant factors in both groups. Conclusions: Children with congenital cataracts should be monitored carefully after cataract surgery for the development of strabismus especially when they have poor postoperative visual acuity, nystagmus, large postoperative interocular visual acuity differences, or preservation of posterior capsule. J Korean Ophthalmol Soc 2011;52(3):325-331

퇴계의 「향입약조」 재구성

김상현(Kim, Sang-hyun) 대한철학회 2021 哲學硏究 Vol.157 No.-

퇴계의 「향입약조」는 율곡의 「해주일향약속」과 더불어 조선향약의 전형으로 평가받는다. 그래서 많은 연구자들이 퇴계의 향약을 연구하기 위해 『퇴계선생문집』에 수록되어 있는 「향입약조」를 분석하였다. 그런데 『퇴계선생문집』에 수록된 「향입약조」보다 퇴계의 향약 사상을 더 온전히 담고 있는 「향입약조」가 있다는 문제 제기가 등장했다. 『퇴계선생문집』본 「향입약조」에 대한 의문이 제기되자 이어서 몇몇 학자들은 『퇴계선생문집』이 간행될 때 퇴계 선생이 초안했던 「향입약조」의 조항 일부가 누락된 채 간행되었다는 주장을 제기하고 있다. 이렇듯이 『퇴계선생문집』본 「향입약조」가 퇴계의 향약 사상을 온전히 담고 있는 자료인지에 대한 논란이 일고 있다. 문제는 퇴계의 향약 사상을 온전히 담고 있는 「향입약조」가 무엇이냐에 대한 이견은 퇴계의 향약 사상이 정확히 무엇인지, 그것의 주요 특징은 무엇인지에 대한 논란을 낳을 수밖에 없다. 그런데도 학계에서는 아직도 이 문제에 대한 규명작업을 하고 있지 않다. 따라서 본 연구의 목적은 퇴계의 사상을 온전히 담고 있는 「향입약조」를 복원하는 것이다. 이와 같은 목적을 이루기 위해 우리는 다음과 같은 과정을 밟을 것이다. 먼저, 퇴계의 「향입약조」와 관련된 선행연구를 검토할 것이다. 다음으로 퇴계 향약이 조선향약의 핵심으로 자리잡는데 결정적 역할을 한 제자 김기의 향약과 퇴계의 향약과 매우 유사한 것으로 평가되는 호남의 양과동향약을 차례로 분석할 것이다. 이렇게 문헌적 탐구가 마무리되면, 마지막으로 퇴계의 사상 내부로 들어가 앞선 연구를 통해 복원한 「향입약조」조항들이 퇴계의 평소 지론과 얼마나 잘 부합하는지를 검토할 것이다. 이와 같은 연구를 통해 『퇴계선생문집』 간행시 누락되었던 벌목 3개 조항과 각 벌목의 세부 규정을 복원할 것이다. This thesis is intended to find Toegye’s Hyang-Lip-yak-jo(鄕立約條) which contains the ideas of Toegye’s Hyangyak entirely. To achieve this goal, we will take the following steps. First, we will review prior research related to Toegye’s Yang-Lip-yak-jo. Through this analysis, we will reveal that there are several types of Toegye’s Hyang-Lip-yak-jo. Next, we will analyze Kim-gi-hyangyak(金圻鄕約) which established Toegye’s Hyangyak as the core of Joseon-Hyangyak, and Yang-Gwa-dong-hyangyak(良苽洞鄕約) which is considered very similar to Toegye’s Hyangyak. When this literature research is completed, we will finally go inside the thought of Toegye and examine how well the previously restored provisions of Hyangyak fit with Toegye’s usual theory. Through this research process, we will restore three provisions of Penalty and the details of each Penalty provision, which were omitted in the publication of the TegyeseonsaengMunjib(退溪先生文集).

척수종양 수술 후 발생한 척추 불안정 : 추궁성형술과 추궁제거술의 비교 연구

김상현,진동규,윤영설,진병호,조용은,김영수,Kim, Sang Hyun,Chin, Dong kyu,Yoon, Young Sul,Jin, Byung Ho,Cho, Yong Eun,Kim, Young Soo 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.1

Objectives : To demonstrate the preventive effect on post-operative spinal deformity of the laminoplasty compared with laminectomy for spinal cord tumor. Methods : Sixteen patients who underwent laminoplasty and 89 patients who underwent lamenectomy were reviewed retrospectively after removal of spinal cord tumors between February 1981 and December 1999. The mean follow-up period after laminoplasty and laminectomy were 29 months(range, 12-49 months) and 66 months(range, 6-120 months) respectively. Patients were observed neurologically and radiologically. Results : Postoperative kyphosis was observed 17 patients(19%) in the laminectomy group, but was not observed in the laminoplasty group. Postoperative slipping was observed 16 patients(18%) in the laminectomy group, but was not observed in the laminoplasty group. Complications such as postoperative scoliosis, rotation, and swan-neck deformity were observed in the laminectomy group, but were not observed in the laminoplasty group. Conclusions : Laminoplasty prevented postoperative spinal deformities after removal of spinal cord tumors, and afforded anatomic reconstruction of the vertebral arch. Additionally, appropriate patient selection maximizes the chance of optimal neurologic outcomes and minimizes complications. Laminoplasty appears to warrant further evaluation as an alternative to wide laminectomies for exposure of intraspinal tumors.

선박용 LED Chamber Light의 열 및 광학 특성에 관한 연구

김상현,이도엽,김우성,장낙원,Kim, Sang-Hyun,Lee, Do-Yup,Kim, Woo-Sung,Jang, Nakwon 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.1

Recently, LED is widely used in the kinds of display devices or lighting. In this paper, we fabricated LED chamber light for naval vessels to replace to conventional chamber light using incandescent lamp. The LED package of chamber light was designed with luminous intensity of 5.5 cd, color temperature of $6,000{\pm}500K$, forward voltage of 3~3.2 V and input current of 60 mA. A LED module was composed of 36 LED packages and metal PCB. The VF and luminous intensity of LED package were getting down when temperature increased. The temperature of LED chamber light was measured by changing the number of LED package and applied current for one hour when an electric current flow. The heat transfer capability have been improved by using metal PCB. The power consumption of LED chamber light reduced by 86% compared to the conventional chamber light using incandescent lamp.

특발성 및 이차성 삼차 신경통에 대한 감마나이프 방사선수술의 역할 - 수술적 치료와의 비교 -

김상현,임영진,임언,이봉암,고준석,김태성,김국기,Keem, Sang Hyun,Lim, Young Jin,Leem, Won,Rhee, Bong Arm,Koh, Jun Seok,Kim, Tae Sung,Kim, Gook Ki 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.5

Objective : To evaluate the role of Gamma Knife radiosurgery in essential and tumor-related(secondary) trigeminal neuralgia, outcomes of radiosurgery and microsurgery were compared each other. Methods : Five patients with essential trigeminal neuralgia underwent stereotactic radiosurgical treatment with Leksell Gamma Knife and twenty five patients were treated with microsurgery during the same period(1994. 1-1997. 6). A 4-mm collimator was used and REZ or proximal portion of trigeminal nerve was targeted with maximal dose of 60-72Gy. The mean follow-up after radiosurgery was 39.4 months and that after microsurgery was 47.9 months. Results : At the last follow-up, four patients(80%) had excellent(pain free) or good(50-90% pain relief) outcomes, one(20%) had poor control after radiosurgical treatment. Twenty-three patients(92%) had excellent or good outcomes and two(8%) had poor results after microsurgery. Postoperative complications occurred in ten(40%) with microsurgery, but there were no complications in patients with Gamma Knife radiosurgery. Six patients with secondary trigeminal neuralgia received radiosurgical treatment directed at their tumors, and three patients were surgically treated. Three of six(50%) patients treated with Gamma Knife had pain relief while two of three patients with surgical treatment showed immediate pain relief. Post-treatment complications were developed in two of six radiosurgical patients and in one of three surgical patients. Conclusion : Gamma Knife stereotactic radiosurgery may be considered as a useful and alternative option for the treatment of essential and secondary trigeminal neuralgia owing to of its safety and less complications. The preliminary results obtained in our series appear encouraging, although the outcome is not so good as that of surgery.

의과대학생들의 진로선택과 진로지도

김상현,윤유상,전우택,양은배,Kim, Sang Hyun,Yoon, Yoo-sag,Jeon, Woo-Tack,Yang, Eunbae 연세대학교 의과대학 2007 의학교육논단 Vol.9 No.2

Purpose: This study analysed the intention of medical students career choice, educational programmes, and mentoring and counseling system for career planning at Yonsei medical school in Korea. Methods: The data were collected based on four separate graduation questionnaires at Yonsei medical school in the years of 2005, 2006, 2007, and 2008. The number of the survey was 130 in 2005, 130 in 2006, 153 in 2007, and that of the latest was 120 in 2008. We analysed the career intention on medical specialties and activities, and perceptions of important factors in choosing medical specialty. Results : The results which can be drawn from this study are these: firstly. students had more intention for choosing clinical medicine as university faculty than any other activities. While male students preferred to major in surgery, neurosurgery, orthopedic surgery, urology, otorhinolaryngology, female students in internal medicine, neurology, anesthesiology and pain medicine, diagnostic radiology, laboratory medicine. Secondly, students perceived that the most important factor which can influence on choosing a medical specialty was individual factor such as one's interests and concerns, values, and aptitudes. In stead, they relatively less perceived mentor and role model's effects on choosing a medical specialty compared to those of the United States of America. Third, the career planning at Yonsei medical school was evaluated well, especially educational programmes for career planning such as self assessment programme, elective(specialized) courses, and conversation with a senior programme. Conclusions: Unexpectedly, there are high demands for career planning by medical students. Therefore, we will reorganize systematic devices for career planning such as mentoring and counseling system at medical school.

PLD법으로 PES 기판 위에 제작된 Mg_0.1Zn_0.9O 박막의 제작 조건에 따른 특성

김상현,이현민,장낙원,박미선,이원재,김홍승,Kim, Sang-Hyun,Lee, Hyun-Min,Jang, NakWon,Park, Mi-Seon,Lee, Won-Jae,Kim, Hong-Seung 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.8

Concern for the TOS (Transparent Oxide Semiconductor) is increasing with the recent increase in interest for flexible device. Especially MgZnO has attracted a lot of attention. $Mg_xZn_{1-x}O$, which ZnO-based wideband-gap alloys is tuneable the band-gap ranges from 3.36 eV to 7.8 eV. In particular, the flexible substrate, the crystal structure of the amorphous as well as the surface morphology is not good. So research of MgZnO thin films growth on flexible substrate is essential. Therefore, in this study, we studied on the effects of the oxygen partial pressure on the structural and crystalline of $Mg_{0.1}Zn_{0.9}O$ thin films. MgZnO thin films were deposited on PES substrate by using pulsed laser deposition. We used XRD and AFM in order to observe the structural characteristics of MgZnO thin films. UV-visible spectrophotometer was used to get the band gap and transmittance. Crystallization was done at a low oxygen partial pressure. The crystallinity of MgZnO thin films with increasing temperature was improved, Grain size and RMS of the films were increased. MgZnO thin films showed high transmittance over 80% in the visible region.

Co-sputtering법으로 제작된 Mg_xZn_1-xO 박막의 인가 파워에 따른 구조적 특성

김상현,손지훈,장낙원,김홍승,윤영,Kim, Sang Hyun,Son, Jihoon,Jang, Nakwon,Kim, Hong Seong,Yun, Young 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.2

The effect of co-sputtering condition on the structural properties of $Mg_xZn_{1-x}O$ thin films grown by RF magnetron co-sputtering system was investigated for manufacturing UV LED. $Mg_xZn_{1-x}O$ thin films were grown with ZnO and MgO target varying RF power. Structural properties were investigated by X-ray diffraction (XRD) and Energy dispersive spectroscopy (EDS). The $Mg_xZn_{1-x}O$ thin films have sufficient crystallinity on the high ZnO power. The EDS analyzed showed that the Mg content in the $Mg_xZn_{1-x}O$ films decreased from 3.99 to 24.27 at.% as the RF power of ZnO target increased. The Mg content in the $Mg_xZn_{1-x}O$ films could be controlled by co-sputtering power.

삼보 연-아연-중정석 광산 주변 하상퇴적물에서의 중금속 오염 연구

김상현,전효택,Kim, Sang-Hyun,Chon, Hyo-Taek 대한자원환경지질학회 1993 자원환경지질 Vol.26 No.2

Stream sediment samples were collected in the vicinity of the Sambo Pb-Zn-barite mine in order to investigate dispersion patterns and pollution levels of heavy metals, and to find out their mode of occurrences. Those samples were analyzed for Cd, Cu, Pb, Zn, Fe, and Mn by using partial extraction and sequential extraction methods. Stream sediments of this studied area has been contaminated severely by Pb, Zn, and Cd. Dispersion patterns of heavy metals in those sediments are different according to their pollution source and sampling distance from the mine. The stream sediment pH is generally neutral in control area, and is slightly acidic in the lower part of tailing dam. The main pollution source of stream sediments was confirmed as tailing and mine drainage. Their pollution level depends mainly on inflowed water and distance from the mine. The tolerance index ranges from -0.9 to 0.7. The mode of occurrances of heavy metals in polluted stream sediment are identified as Fe-Mn oxides, organic bounded and carbonate-bounded compound which show high potential of bioavailablity.

직무분석을 통한 건축컴퓨터그래픽전공 교과과정 연구

김상현,박종백,Kim, Sang-Hyun,Park, Jong-Beak 한국디지털건축인테리어학회 2001 한국디지털건축인테리어학회 논문집 Vol.1 No.1

This research is to grasp the identify the curriculum development procedure for architectural computer graphics. In order to achieve the above purpose, this study was carried out job analysis of architectural graphic designer. Architectural Computer Graphics Curriculum is developed by tasks analysis. Each characteristics are as fellow: 1. job-related knowledges are based on architectural design parts, 2. skilled workers should be made on the base of job analysis and O.J.T(On the job training) 3. trained students are related many kinds of all industry parts of Architecture & interior Especially college students have needs for design part of architecture fit on study in these curriculum.