http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이성근,이광철,이승섭,Lee, Sung-Keun,Lee, Kwang-Cheol,Lee, Seung-S. 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.11
Microlenses and microlens arrays are fabricated using a novel fabrication technology based on the exposure of a resist (usually PMMA) to deep X-rays and subsequent thermal treatment. The fabrication technology is very simple and produces microlenses and microlens arrays with good surface roughness (less than 1 nm). The molecular weight and glass transition temperature of PMMA is reduced when it is irradiated with deep X-rays. The microlenses is produced through the effects of volume change, surface tension, and reflow during thermal treatment of irradiated PMMA. The geometry of the microlens is determined by parameters such as the X-ray dose applied to the PMMA, the diameter of the microlens, along with the heating temperature, heating time, and cooling rate in the thermal treatment. Microlenses are produced with diameters ranging from 30 to 1500 ${\mu}{\textrm}{m}$. The modified LIGA process is used not only to construct hemispherical microlenses but also structures that are rectangular-shaped, star-shaped, etc.
에너지 효율적인 이더넷에서 개선된 LPI 제어 메커니즘
이성근,장용재,유남현,Lee, Sung-Keun,Jang, Yong-Jae,Yoo, Nam-Hyun 한국전자통신학회 2012 한국전자통신학회 논문지 Vol.7 No.5
IEEE 802.3az LPI 메커니즘은 전송할 데이터가 없을 경우 취침 모드로 천이하여 다수의 컴포넌트들을 저전력 상태를 유지하게 함으로써 에너지 효율성을 향상시킨다. LPI는 소량의 데이터가 주기적으로 전송되는 상황에서는 잦은 전송 모드 변환에 따른 오버헤드 때문에 에너지 효율이 크게 개선되지 못하는 문제점이 있다. 본 논문에서는 전송계층 트래픽 특성 및 네트워크 상태에 따라 LPI 모드 상태 천이를 적응적으로 수행하는 개선된 LPI 메커니즘을 제안한다. 시뮬레이션 방법에 의한 성능 분석을 통해 제안한 메커니즘이 다양한 트래픽 부하에 대해서 기존 방법보다 에너지 효율성을 향상시키는 것으로 나타났다. IEEE 802.3az LPI mechanism allows an Ethernet link to reduce power consumption by entering a low-power sleeping mode and letting some components being powered off when there is no data to be transmitted through the link. However, if small amount of packets are being sent periodically, such a mechanism can not obtain energy efficiency due to a high overhead caused by excessive mode transitions. In this paper, we propose an enhanced LPI mechanism which can perform state transition adaptively based on the traffic characteristics on transport layer and network status. This simulation result shows that proposed mechanism improves energy efficiency than LPI mechanism with respect to energy consumption rate for various traffic loads.
하악골 비대칭 환자의 양측성 하악골 시상분할 골절단술 후 하악과두의 위치 변화
이성근(Sung-Keun Lee),김경욱(Kyung-Wook Kim),김철환(Chul-Hwan Kim) 대한구강악안면외과학회 2004 대한구강악안면외과학회지 Vol.30 No.5
Purpose: After the surgical correction with sagittal split ramus osteotomy, the position of the mandibular condyle in the glenoid fossa and the proximal segment of the mandible change because of bony gap between proximal and distal segment, especially in case of mandibular setback asymmetrically. In this study, positional changes in the condyle and proximal segment after BSSRO were estimated in the mandibular asymmetry patient by analyzing the in submentovertex view and P-A cephalogram for identification of ideal condylar position during surgery. Patients and Methods: The 20 patients were selected randomly who visit Dankook Dental Hospital for mandibular asymmetry. Bilateral sagittal split ramus osteotomy with rigid fixation was performed and P-A cephalogram and submentovertex view was taken at the time of preoperative, immediate postoperative, 3 month postoperative period. Results: Intercondylar length and transverse condylar angle was increased due to inward rotation of proximal segment and anteromedial rotation of lateral pole of condyle head. The condylar position had a tendency to return to the preoperative state and after 3 months return up to about half of the immediate post-operative changes, and all the results showed more changes in asymmetry patient and deviated part of the mandible. Conclusion: Based on all these results above, surgeon should make efforts to have a precise preoperative analysis and to have a ideal condylar position during rigid fixation after BSSRO.
요부경박천자후 발생된 두통치료 - 자가혈액봉합 37 예 -
이성근(Sung Keun Lee),김태정(Tae Jung Kim),김용익( 대한통증학회 1989 The Korean Journal of Pain Vol.2 No.1
N/A We performed the autologous epidural blood patch (AEBP) for the relief of headache and other related symptoms following dural punctures of the lumbar region during 8 years from 1981 to 1988. The total of 37 patients with the patching consisted of 9 cases in 3007 of spinal anesthesia, 12 accidental dural punctures in 4283 cases of lumbar epidural anesthesia, 12 cases in 4747 of epidural analgesia' for back pain control, 3 cases of myelography and a case of diagnostic lumbar puncture. The headaches were relieved completely in 35 cases following the first AEBP and the remaining two were also relieved following the second AEBP. We think that the AEBP for postdural-puncture headache is the treatment of choice.
이성근(Sung-Keun Lee),박영신(Young-Shin Park),백남열(Nam-yul Baek),이의찬(Eui-Chan Lee),김연찬(Youn-Chan Kim),김준용(Joon-Yong Kim) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.7
전국적으로 (택지)개발사업이 송전선로 지중화사업과 병행되어 추진되고 있다. 이에 따라 지중화사업 진행 시 필수적으로 설치되는 케이블헤드의 규모가 크고 미관을 저해하여 지역주민들의 설비에 대한 반감이 날로 증가하고 있다. 이에 지역주민들의 거부감을 해소하고, 주민의 수용성을 제고하기 위해 환경 친화적이고 주위 경관과 조화를 이룰 수 있는 新개념옥내 케이블헤드 모델을 개발하고자 한다.