반안면 왜소증의 수술적 교정: 5년간 65례의 고찰

백승준,김진오,백롱민,오갑성,백세민 大韓成形外科學會 1997 Archives of Plastic Surgery Vol.24 No.5

Hemifacial microsomia is a descriptive term for the developmental anomaly affecting the tissues derived from 1st and 2nd branchial arches, expressed as asymmetric underdevelopement in facial bony skeleton. Conventional strategy of surgical correction for hemifacial microsornia consists of leveling though maxillary LeFort osteotomy and rotation, advancement and recession through bilateral sagittal split us osteotomy, which was reinforced by ancillary procedures such as mandibular augmentation with onlay bone graft, mandibular angle ostectomy, temporomandibular dibular joint (TMJ) reconstruction and malar reconstruction. But these like conventional methods for correction of hemifacial microsomia were emphasized on the correction of vertical asymmetry primarily, overlooked the asymmetry of horizontal plane, namely hypoplastic malar deformity. In general, correction of malar hypoplasia was achieved by rib or calvarial bone graft. These methods remain donor site deformity and the result can not be precisely predicted due to progressive resorption of bone. Moreover, the natural appearance of zygomatic complex could not be established by bone graft. Malar expansion by zygomatic osteotomy and spread-out technique was applied on correction for 34 case in total 65 cases of hemifacial microsomia from March 1991 to February 1996. We could get more natural appearance of malar complex and facial symmetry in the correction of hemifacial microsomia at one stage operation than conventional malar reconstruction methods.

이개 재건술 후 늑연골 공여부의 분석

백승준,임재호,백룡민,오갑성,백세민 大韓成形外科學會 1997 Archives of Plastic Surgery Vol.24 No.5

The harvesting of costal cartilage for the total ear reconstruction elicits various functional and aesthetic problems such as pneumothorax, atelectasis, pain, scar and chest contour deformities. Although the costal cartilage has been the most popular autogenous tissue for the total ear reconstruction, the studies about problems of donor site after harvesting the costal cartilage were relatively rare. From March 1989 to October 1996, 153 cases of total ear reconstruction by the costal cartilage framework insertion were done in our hospital and 61 cases whose follow up were done over 6 months were analysed for donor site scar, contour deformity and rate of satisfaction. The optimal age of microtia reconstruction was considered as over the age of 8, because of the growth of the ear and the volume of costal cartilage. Through a small incision, 3 ~ 4 cm, on the contralateral chest, the 6th, 7th and 8th costal cartilage were harvested with the outer layer of perichondrium for survival of the costal cartilage framework, the inner layer of perichondrium was remained for the growth of costal cartilage. There were 4 cases of uneventful pleural perforation, and remained no problems on the patients. The state of chest donor site were analyzed on 61 patients by use of medical records, medical photos and interview with the patients. Mean length and width of chest scar were 5.2 cm and 2.3 mm 79% of patients classified as excellent or acceptable. Chest contour deformity was observed on 39% and 85% of patients were satisfied with the result of donor site.

多商品 地域間市場均衡模型을 위한 媒介變數解法의 擴張方法

成百瑞 건국대학교 1985 商經論叢 Vol.- No.20

階層化意思決定(AHP)을 利用한 에너지/資源 技術開發 優先順位 評價模型

成百瑞 建國大學校 經濟經營硏究所 1993 商經硏究 Vol.18 No.1

This paper presents an analytic hierarchy process(AHP) model for determining the energy/resources R & D priorities in Korea. The priority planning problem in the energy/resources R & D sector is a very complex one with multiple decision criteria such as the degree of contribution to the national energy securities, the relative economic efficiency, the possibility of R & D success, the degree of proliferation effect in national scientific/technological improvement, and the degree of effects to the recent hot issue of environmental problems, etc. We employ the AHP technique which is known to be useful for such a muti-attribut decision-making problem. We first investigate the R & D characteristics of Korean energy/resources technologies, and design a hierarchical priority evaluation system. Based on this, we develop AHP questionaires and survey over the experienced experts in two stages. The first stage is done to the experts separated by research areas such as electricity, nuclear, oil, gas, coal, renewable energies, energy saving, etc., appreciating the differences among the areas. The R & D options evaluated as that of first priority in each area are reevaluated by the energy policy experts in the second stage. The results are demonstrated selectively with the emphasis on the data manipulation method because they are not our primary concerns. The full report of the results can be found elsewhere.

地域間市場均衡模型의 敏感度分析 : 非線型模型을 위한 媒介變數 넷트�p 解法을 利用하여

成百瑞 건국대학교 1988 學術誌 Vol.32 No.1

This paper considers the application of the Parametric Network Algoritum for nonlinear spatial market equilibria to the sensitivity analysis of the model parameters and/or model data. The sensitivity cases handled include the changes of the excess demand function parameters and the unit transportation costs, and the introduction of a new market into the model. For all but the cost decreasing cases, the very steps of the parametric network algorithm can be directly utilized without any modifications. In the cost decreasing case, however, it is shown that the modified MODI method using a partial basis concept for resolving the degeneracy of the minimum cost network flow problems can be adopted to find a way of utilizing the parmetric-network algoritum. For each cases, simple examples are given for the purpose of comprehensiveness.

차류에 의한 찻물중 중금속(Cd, Pb)제거 효과

백승화,박성수,김중만 圓光大學校 1996 論文集 Vol.31 No.2

차재료를 찻물에 담근후 차건데기를 건저내고 마시는 차류의 중금속 제거능을 조사하기 위하여 Cd, Pb 용액에서 보리차, 옥수수차, 쟈스민차, 현미녹차, 홍차, 결명자차, 감껍질차, 귤껍질차, 누룽지의 입자별, 농도별, 온도별 제거정도를 조사한 결과는 다음과 같다. 입자의 크기가 작아질수록 모든 차에 있어서 중금속 제거력은 증가 되었고, 금속별 제거량은 Cd는 결명자차(3.253-6.136mg/g)가, Pb는 쟈스민차(6.784-7.557mg/g)가 높았다. 농도별 중금속 제거량은 중금속의 농도가 증가할 수록 증가하였는데 Cd와 Pb는 쟈스민차(1.209-4.815mg/g)가 제거력이 높았다. 농도별 중금속의 제거작용은 모든 차류에서 증가되었으나 옥수수차는 Pb에서 0.497-0.647mg/g로 제일 낮았다. 온도별 중금속 제거량은 온도가 높아질수록 증가하여 Cd은 결명자차가 4.080-7.799mg/g, Pb는 쟈스민차가 7.003-7.763mg/g으로 증가하는 경향을 보였다. 이상의 결과로 부터 맹물로 끓여마시는 것보다는 각종 차를 이용하여 찻물을 만들어 마시면 음용수에 함유된 중금속을 제거하는데 도움이 된다. To investigate heavy metals(Cd and Pb) removablity by the tea materials (barley-tea, corn-tea, jasmin-tea, brown rice-green tea, black-tea, cassia tora-tea, persimmon peel-tea, orange peel-tea and rice-tea) in the tea-water, heavy metal removability of nine kinds of tea was investigated in the various conditions; particle size of tea(20, 40, 70 mesh), concentration of heavy metal(25, 50, 100 ppm) and extraction temperature(20, 30, 50, 100℃). The removabilities by the tea solids were increased as the particle size decreased, concentration of heavy metal increased, and extracting temperature increased. Of the nine kinds of tea, Cd and Pb removability by jasmin-tea was highest. In addition, heavy metal removability by cassia tora tea was better than that of other tea as extraction temperature was increased.

환경경영을 위한 투자 프레임워크의 개발 : ISO14000을 중심으로

성백서 建國大學校 經濟經營硏究所 1998 商經硏究 Vol.23 No.2

The corporate environmental management system shall be essential for most of the firms in this planet. Korean firms also cannot avoid this trends. However, under recent economic conditions ruled by International Monetary Fund, Korean business managers seem to lower the priorities of environmental issues in their business decisions due to the financial pressure, so that the investments in developing environmental management system be slowed down. In the meanwhile, in light of competence of environmental management system, Korean firms have little experiences and are lack of basic knowledges and know-hows relative to those of developed countries. The ISO14001 EMS(Environmental Management System) is a voluntary standards which is expected to be a worldwide business requirement near future. It is designed not only to help a systematic implementation of any organization's specific EMS, but also, through continuous improvement process, to enable it to facilitate system learning. In this paper, we first investigate several issues of ISO14000 standards in relation to the meaning of its certifications for Korean firms and then suggest a model for developing an EMS utilizing the basic ISO 14001 EMS principles. The suggested model could be expected to help create a system learning and can be a useful framework to make a long-term investment strategy, so that Korean managers could take it easy to handle and involve in environmental problems.

우리나라 企業의 生産시스템 柔軟性 確保戰略 : 槪念的 틀

成百瑞 건국대학교 1993 學術誌 Vol.37 No.1

In this paper we propose a conceptual framework for the long-term strategy of manufacturing flexibility in Korean firms. It is based on the intensive review of manufacturing flexibility and manufacturing strategy literatures. First, we review on the various concepts of manufacturing flexibility following the unified framework of Hyun and Ahn and summarize the definitions of each flexibilities in the multi-dimensional manner. In doing so, special attention is paid on the concept of dynamic flexibility which is defined by the ability to increase productivity steadily through improvements in production processes and innovation in product. Next, we investigate the strategic value of the manufacturing flexibility through the review of previous studies and in light of the manufacturing strategy. The importance of the manufacturing infrastructure is stressed relative to the structural elements in the strategic decision making and the development of competitive advantage. The proposed framework incorporates these two concepts, i.e., the dynamic flexibility and the relative importance of the manufacturing infrastructure in developing the long term manufacturing flexibility in Korean firms which is assumed to be lack in both hardware and software technologies, especially in managerial technologies.

시각적 수행 환경을 가지는 IPC도구의 설계 및 구현에 관한 연구

성백훈,허신 한양대학교 공학기술연구소 1992 공학기술논문집 Vol.1 No.1

This paper presents the design and implementation of the Visual IPC(Inter Process Communication) package of UNIX System V that supports visual execution environments. The concurrent program is required for the development of Operating Systems and real-time computing environments. However, it takes more time and cast in development, design, and error correction phase than those of conventional programs. The Visual IPC package provides visual execution environments by showing data exchanges and the synchronization among processes. Therefore, it can save time and cost when it used for concurrent program development. And also, it can be used for instruction tools to improve understanding of concurrent programs. This paper is implemented on the Mips-2030 Unix System V.

국제환경문제의 이론적 고찰

성백서 建國大學校 經濟經營硏究所 1997 商經硏究 Vol.22 No.1