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변재광,김희중 啓明大學校 産業技術硏究所 1997 産業技術硏究所 論文報告集 Vol.20 No.-
At each construction stage, the dynamic behavior of a FAN type cable-stayed bridge was examined in this study. The recorded earthquake accelerogram was subjected to the structure, and the peak acceleration was scaled to 0.14g according to the bridge design specification. In case of pylon on the cable-stayed bridge, dynamic displacement at the initial stage of construction was determined as large as 6 times for the completed structure. It was shown that member forces at initial stage was higher than that of the completed structure. In case of the girder, dynamic displacements at the initial stage of construction was observed as high as 4 times of the completed structure, and a large tensile stress occurred when a guide cable was disassembled. Based on this study, it was found that the effect due to seismic loading was great of both the first stage of construction and disassembly of the guide cable. A block of construction should be adjusted properly at each construction step for a FAN type cable-staged bridg.
변재경,주기찬,백왕일 韓國舞踊敎育學會 2000 韓國舞踊敎育學會誌 Vol.11 No.1
The purpose of this study was to compare the difference of cardiorespiratoy responses to exercise among three tapes of dancers, and to verify their cardiorespiratory charcteristics due to specificity of dance buck as the pattern of limb movement, velocity of motion and so forth The subject of this study were 44 female collegiate students and comprised of each 11 Korean dancers, modern dancers, ballet dancers, and untrained students. The dependent variables were minute ventilation respiratory frequency, tidal volume, exercise duration, oxygen uptake, heart rate, respiratory exchange ratio, O2 purse, and anaerobic threshold not only at 3minutes, 6minutes and 9minutes during graded exorcise test but also maximum level. With above experimental precess, the results were gained as follows: First, the minute ventilation of the ballet group progressively increased with the increase of workload of treadmill at 3minutes,6minutes, 9minutes and maximum level. That of the control group was significantly high in comparison with that of the ballet group at 3minutes, 6minutes and 9minutes, but there was no significant differences at maximum level. Second, the respiratory frequency, tidal volume and O2 purse progressively increased in all groups with the increase of workload at 3minutes, 6minutes, 9minutes and maximum level, but there was no statistically significant differences. Third, as for the mean exorcise duration of all the group, the ballet dancers showed 10min. 27sec, the Korean dancers 10min, 15sec, the modern dancers 9min-56sec and the control group 9min. 36sec. The control group was significantly high in comparison with the ballet group. Fourth, the oxygen uptake(VO2) progressively increased with the increase of workload in all the dancers' groups. At 6 minutes, the control group was significantly high in ccmparison with the modern dancers. At 9 minutes, the ballet dancers was signiflcantly high in comparison with the modern dancers. At maximum level, the ballet dancers was signiscantly high in comparison with the rest three groups. Fifth, the respiratory exchange ratio progressively increased with the increase of workload in all groups. At 3 minutes, the modern dancer was significantly high in comparison with the control group, while at 9 minutes, the control group was significantly high in comparison with the Korean dancers. Sixth, the heart rate (HR) increased progressively in all groups with the increase of workload. At 9 minutes, the HR of the control group was significantly high in comparison with that of the rest three groups. Seventh, as for anaerobic threshold according to % VO2 max, the ballet dancers was 67.24 6.74, the Korean dancers 62.30 4.50, the modern dancers 67.32 8.30, and the control group 63.30 4.50. There was no significant differences in anaerobic threshold of three types of dancers. With the above results, the groups of ballet dancers and modern dancers were significantly high in oxygen uptake, heart rate and exercise duration in comparison with other groups because the groups of ballet dancers and modem dancers do a lot of physical training. Moreover, the group of ballet dancers was the highest in cardiorespiratory function of all the other groups.
외환시장 환경변화에 따른 환위험 관리에 관한 연구 : A Case of Korea
변재권,장영민 전북대학교 산업경제연구소 2001 전북대학교 산업경제연구소 논문집 Vol.32 No.1
본 연구는 97년도 외환위기 이후 우리나라 외환시장의 환경변화 특징을 살펴보고 환위험관리 실태에 관한 국내의 관련 문헌적 고찰을 통하여 외국기업과 국내기업의 환위험 관리실태를 비교분석하여 국내기업이 직면하고 있는 환위험관리 실태에서 발생하는 문제점과 이에 보다 효율적으로 대응할 수 있는 정책적 시사점을 제시하고자 하였다. 나타난 문제점으로 첫째, 환위험관리에 대한 경영자의 인식 부족, 둘째 국내의 외환 및 금융시장의 정보접근성 약화, 셋째 환위험관리체제 미비, 넷째 기업의 환위험관리 강화를 위한 정부지원책의 미흡 등을 들 수 있고 이에 대한 정책 시사점으로 환위험관리체계 강화 방안, 외환시장의 하부구조 개선, 장부외거래에 대한 제도개선과 세제지원 그리고 환위험관리를 위한 통합분석 등을 제시하였다.
주혈관이 하나만 남은 하퇴부 연부조직 결손 환자에서 비복혈관(sural vessel)을 수혜혈관으로 한 유리피판 전이
변재경,하범준,현원석,김재중,신명수 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.3
Free flaps have been widely used in lower leg reconstruction. However, in cases with extensive injury to the vessels as well as to the bone and soft tissues, and having only one intact major vessel in the lower leg(single vessel leg), careful selection of recipient vessels for the free flap transfer is mandatory for preventing further vascular compromise of the distal lower leg. The sural artery and its vena comitantes are frequently protected form externally harmful forces by the bulky surrounding gastrocnemius muscle and can be used as recipient vessles for free flaps without any detrimental influence on the vascularity of the distal lower leg. In our department, three latissimus dorsi muscle free flap were transferred with sural vessels as recipient vessels in the reconstruction of the single vessel legs. Except for one case of flap failure due to serious infection at the microvascular anastomoses site, all the other cases were successfully reconstructed without any necrosis of the gastrocnemius muscle or the distal leg. In addition, the sural vessels were easily accessed in any patient position and their caliber was similar to that of the vascular pedicles of the donor muscle flaps. In conclusion, the sural vessels can be another useful option in selecting recipient vessels for free flap transfer in the reconstruction of the single vessel leg.