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편측성 구순구개열 환자에 있어 구순성형술과 동반한 서골피판법
한윤식,이호,서병무 대한구순구개열학회 2010 대한구순구개열학회지 Vol.13 No.2
Vomer flap is used to repair anterior hard palate in complete cleft lip and palate patients. As the midline structure located in between the two cleft segments of hard palate, the vomer flap is very useful because of its vicinity to cleft site and their ease of execution when it is done with primary cheiloplasty simultaneously. In addition, the quality of tissue is very similar to that of the nasal mucosa with good vascularity. In cases of simultaneous repair of cleft lip with anterior palate using vomer flap, the hard palate can be repaired at the same time with primary cheiloplasty which is earlier period than other techniques. With simultaneous close of cleft lip and cleft hard palate by vomer flap, subsequent palatoplasty does not require wide dissection, and consequently chance of oronasal fistula formation will be minimized. Additionally, surgical time will be reduced and, the harmful effects on mid-facial growth will be diminished. In this article, we will introduce the comprehensive vomer flap technique with primary lip closure and review the comparative studies of the outcome of simultaneous repair of cleft lip and cleft hard palate with vomer flap.
초고밀도 디스크 드라이브를 위한 반 진공 작동 환경에서 서보 트랙 기록 방법에 의한 RRO 저감에 대한 연구
한윤식,강심우 한국소음진동공학회 2004 한국소음진동공학회 논문집 Vol.14 No.11
In high-capacity disk drives with ever-growing track density, the allowable level of position error signal(PES) is becoming smaller and smaller. In order to achieve the high TPI(track per inch) disk drive, it is necessary to improve the writing accuracy during the servo track writing(STW) Process through the reduction of track mis-registration sources. Among the main contributors of the non-repeatable runout(NRRO) PES, the disk vibration and the head-stack assembly vibration is considered to be one of the most significant factors. Also the most contributors of repeatable runout(RRO) come from the contributors of NRRO which is written-in at the time of STW process. In this paper, the effect of NRRO on servo written-in RRO is Investigated by experimentally, and the experimental result shows that the written-in RRO can be effectively reduced through a STW process under low dense medium condition such as semi-vacuum.
한윤식,이종원 한국소음진동공학회 1998 소음 진동 Vol.8 No.5
A new signal processing technique, the directional harmonic wavelet map(dHWM), is presented to characterize the instantaneous planar motion of a measurement point in a structure from its transient complex-valued vibration signal. It is proven that the directional auto-HWM essentially tracks the shape and directively of the instantaneous planar motion, whereas the phase of the directional cross-HWM indicates its inclination angle. Finally, the technique is suessfully applied to an automobile engine for characterization of its transient motion during crank-on/idling/engine-off.
한윤식 ( Han Yun Sig ) 밴쿠버기독교세계관대학원 2003 통합연구 Vol.16 No.2
Handong University has established its reputation among other universities and Christian churches in Korea in a relatively short period of time, successfully maintaining its pure Christian identity since the beginning. The purpose of this paper is to analyze the possibility of Handong University as a genuine Christian college by fully integrating faith and learning and by battling against its secularization. To do this, three factors necessary for making a Christian college are being reviewed including the Christian vision of the university, Christian ethos embedded in various systems, and people who will realize the vision and ethos into teaching and research. In addition, there are three additional yet significant factors in the Korean situation that must be recognized and dealt with. These include maintaining a high academic excellence and competitiveness, taking into consideration the financial feasibility of a good education as well as the curriculum. Like most other Christian colleges, Handong University`s Christian vision is not yet in its fully developed, nor refined state; however, the members` commitment and passion have created a new Christian college culture in Korea and have changed the innately secular system into a more Christian one. It is important to note the substantial efforts that are being made to integrate faith and learning which is being increasingly emphasized among professors as well as students.
한윤식(Yoon-Sic Han),이인우(In-Woo Lee),이 호(Ho Lee),서진원(Jin-Won Suh),김성민(Soung-Min Kim),명 훈(Hoon Myoung),황순정(Soon-Jung Hwang),최진영(Jin-Young Choi),이종호(Jong-Ho Lee),정필훈(Pill-Hoon Choung),김명진(Myung-Jin Kim),서병 대한구강악안면외과학회 2011 대한구강악안면외과학회지 Vol.37 No.6
Introduction: The incidence of bisphosphonate-related osteonecrosis of the jaw (BRONJ) has increased gradually in patients who have undergone surgical treatment for osteomyelitis. In this study, a retrospective analysis of BRONJ patients was carried out using the data of osteomyelitis patients treated surgically. Materials and Methods: Osteomyelitis patients, who underwent curettage, sequestrectomy, saucerization or decortications, and partial mandibulectomy at Seoul National University Dental Hospital from 2004 to 2010 were enrolled in this study. The patients were classified and categorized into two groups based on the surgical records and progress notes. One group comprised of patients with osteomyelitis and osteoporosis, and the other group included patients with osteomyelitis only. The epidemiological data of the BRONJ patients was analyzed to identify any trend in the incidence of BRONJ in osteomyelitis patients. Results: Among 200 patients who underwent surgical intervention for osteomyelitis, 64 (32.0%) were identified as having osteoporosis as the underlying disease. In these 64 patients, more than 81.3% had been prescribed bisphosphonates. Females were far more affected by BRONJ than males. The incidence of BRONJ also increased with age. The posterior part of the mandible was affected more frequently by BRONJ. Conclusion: Although the availability of potent antibiotics and increased oral hygiene care can reduce the overall incidence of osteomyelitis, BRONJ can increase the total incidence. To prevent BRONJ, it is recommended that an oral examination be performed before prescribing bisphosphonates. Moreover, the patients should be educated about the potential risks of dental procedures that might be causal factors for BRONJ. Furthermore, patient swho take bisphosphonates for the treatment of osteoporosis should undergo periodic follow up oral examinations to prevent BRONJ.