• Archives of Plastic Surgery
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• 제34권1호
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• pp.70-76
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• 2007

Purpose: Full-thickness skin grafts are usually used in facial reconstruction, but on occasion, split-thickness skin graft is also used from the scalp due to the limitation of donor site. However, there were complications, such as alopecia, folliculitis and blood loss. In addition, it can not be used in patients with baldness. Under the circumstances, we used medial arm skin as split-thickness skin graft donor site in lieu of scalp. We investigated the efficacy of the medial arm skin as a donor site of facial skin graft in comparison with scalp. Methods: From 2000 to 2005, the split-thicknesss skin grafts were performed using the medial arm skin in 10 patients and the scalp in 10 patients. We inspected the skin color match, texture match by the visual analogue scale. Scar contracture was estimated by the Visitrak $grade^{(R)}$(Smith & Nephew). The statistical analysis was performed by SPSS 12.0. Results: There was a more satisfaction in color match, texture, and scar contracture in medial arm skin than in scalp. Conclusion: According to these results, medial arm skin may be used efficiently as an alternative donor site of scalp in the facial reconstruction.

• 한국지반환경공학회 논문집
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• 제12권4호
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• pp.53-63
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• 2011

동적 지진해석 수행 시 적절한 입력지진파를 선정 생성하는 것은 매우 중요하다. 현재 국내에서는 일반적으로 국외에서 계측된 강진 기록이나 인공지진파가 입력지진파로 사용된다. 계측지진기록은 지진파의 고유성질인 시간에 따라서 주파수 특성이 변이하는 비정상(Non-Stationary) 특성을 가지고 있지만 설계 응답스펙트럼과는 일치하지 않으며 주파수영역에서 생성된 인공지진파는 설계 응답스펙트럼과는 일치하지만 정상(Stationary) 특성을 가지고 있는 단점이 있다. 본 연구에서는 계측기록의 Non-stationary 특성을 보존하되 동시에 설계 응답스펙트럼에 상응하는 지진파를 생성하였다. 적용된 기법은 Impulse 함수를 이용하여 시간영역에서 지진기록을 목표 스펙트럼에 상응하도록 보정하는 알고리즘이다. 적용 결과, 시간영역 변화 알고리즘은 성공적으로 계측 지진기록을 설계 응답스펙트럼와 일치하도록 조정할 수 있으며 원 지진기록의 Non-stationary 특성을 보존하는 것으로 나타났다. 나아가 계측 지진기록과 보정된 지진기록을 적용한 비선형 지반응답해석을 수행한 결과, 보정된 지진파를 이용한 결과가 보다 합리적인 것으로 나타났다. 본 연구에서 변환된 지진기록은 기존 기록의 문제점을 보완하는 진보된 입력지진파인 것으로 나타났으며 추후 지진해석 시 이를 준용하는 것이 합리적일 것으로 판단된다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.911-914
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• 1998

In this paper, the importance of including small image features at the initial levels of a progressive second generation video coding scheme is presented. It is shown that a number of meaningful small features called details shouuld be coded in order to match their perceptual significance to the human visual system. We propose a method for extracting, perceptually selecting and coding of visual details in a video sequence using morphological laplacian operator and modified post-it transform is very efficient for improving quality of the reconstructed images.

• Communications for Statistical Applications and Methods
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• 제6권1호
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• pp.143-150
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• 1999

Ko(1998) proposed a procedure to enhance the efficiency of double sampling plans by allowing second-stage sample size and critical region to depend on first-stage evidence using constraint optimization approaches. In this study further developments of such plans by incorporating several practically possible researcher's aims into the optimization are considered. Comparisons are made with the optimal ordinary double sampling plan and also among them It is observed that it is to some extent possible to match the details of the optimization to certain qualitative methodological aims.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.820-823
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• 1996

In contrast to parts of relatively simple shapes, it is important to match their cross-sectional shapes during mating parts of complicated shapes. It requires the 2.pi. information along their matching boundary to figure out their relative geometrical shapes. In this paper, we propose a method measuring a misalignment at the interface during mating parts with the complicated shapes by using the omnidirectional image sensing system(OLSSA). Also we carried out experiments in order to prove the method, and the results show the feasibility.

• 대한치과보존학회:학술대회논문집
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• 대한치과보존학회 2001년도 추계학술대회(제116회) 및 13회 Workshop 제3회 한ㆍ일 치과보존학회 공동학술대회 초록집
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• pp.583.2-583
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• 2001

In these days, as the patients requirements on ethetics are getting greater, so the restorative materials which match well with natural teeth colors are being developed. One of those materials is the composite resin. When we fill the composite resin into the prepared cavity, it makes some clinical problems because it shrinks during the polymerization. To resolve these problems, first we must have sufficient understandings on the polymerization of composite resin.(omitted)

• Water Engineering Research
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• 제1권4호
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• pp.293-298
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• 2000

Optimal values of $\alpha$ characterizing the linear dispersion property in the modified Boussinesq equations are determined by minimizing the combined relative errors of the phase and group velocities. The value of $\alpha$ is fixed in previous studies, whereas it is varying in the present study. The phase and group velocities are calculated by using variable $\alpha$ and compared to those of the linear Stokes wave theory and previous studies. It is found that the present study produces the best match to the linear Stokes theory.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.35.4-35
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• 2001

Image detection system for road traffic data analysis is a real time detection system using image processing techniques to get the real-time traffic information which is used for traffic control and analysis. One of the most important functions in this system is to match the coordinates of real world and that of image on video camera. When there in no way to know the exact position of camera and it´s height from the object. If some points on the road of real world are known it is possible to calculate the coordinates of real world from image.

• Archives of Plastic Surgery
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• 제35권1호
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• pp.36-41
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• 2008

Purpose: For facial reconstruction, skin color match is crucial to achieve great aesthetic result. Forehead flap and full thickness skin graft have been used for many years to reconstruct facial defect. Their results are aesthetically valuable with remarkable resemblance and harmony of the skin color between donor and recipient sites. The purpose of this study is to evaluate and compare the aesthetic outcome of the two methods as the analysis of skin color match. Methods: From January 1995 to December 2005, ten forehead flaps and ten full thickness skin grafts were performed. The reconstructed areas of forehead flaps were five noses and five eyelids. Recipient sites of full thickness skin grafts were seven eyelids, two noses and one forehead. In order to obtain the objective validity, the skin color of flap(or graft) and the recipient sites were measured by chromameter. The skin colors were quantified according to a three-dimensional coordinate system used in chromameter, L*(brightness), a*(redness), and b*(yellowness).Results: There was no significant color difference between forehead flap site and adjacent skin in all color values. On the other hand, the L* and b* values of graft sites were significantly lower than those of the adjacent skins. The a* values of graft sites were higher than those of the adjacent skins. Conclusion: This study reveals that skin color match of forehead flap is greater than that of full thickness skin graft. As forehead flap has adequate volume and great color match, it can be useful to reconstruct deep facial defect such as nasal defect. On the other hand, full thickness skin graft can be used for superficial defect like partial eyelid defect.

• Radiation Oncology Journal
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• 제9권1호
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• pp.165-170
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• 1991

유방암의 근치적 또는 수술후 방사선 조사시 치료해야 할 부위는 유방과 주위임파 조직으로 매우 복잡한 3차인적 구조이다. 여러 방향의 조사에 의한 조사부위의 중복을 피하고 부작용을 최소화하기위한 여러 방법이 시도돼 왔으나 계산과정이나 치료방법이 매우 복잡하여 여러가지 문제점이 있었다. 이에 저자들은 Asymmetric jaw를 이용하고 gantry, collimator와 couch를 적절히 회전시켜 조사야가 만나는 부분에서 beam의 divergence를 없애줌으로써 가장 이상적으로 치료할 수 있는 방법을 소개하고자 한다. 5문 조사 방법은 다음과 같은 장점을 가진다. 1. 모든 조사야의 set up이 같은 위치에서 시행되므로 환자의 위치변동에 의한 target volume의 변화를 막을수 있다. 2. Half beam block을 사용하지 않아도 된다. 3. 조사야가 만나는 선(match line)에서 beam의 divergence가 없으므로 정확하다. 4. 계산이 쉽고 환자 set up이 용이하다. 5. 매일 치료를 같은 방법으로 정화하게 반복할 수 있다.