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한국 보병에서 발생한 중족골 행군골절 양상의 예비적 보고
배영재,윤성일,Bae, Young-Jae,Yoon, Sung-Il 대한족부족관절학회 1998 대한족부족관절학회지 Vol.2 No.2
Stress or march fractures among military personnel, especially recruits, has been appreciated for many years. According to the classical references, the second metatarsal was one of the first sites identified as a focus for march fractures and radiological evidence of fracture appeared as late as several weeks. The purpose of this study was to document the clinical feature of march fractures in Korean infantry soldiers. From 1997 to 1998, at one infantry medical company of OO infantry corps in Korea, 15 (19cases) patients with march fracture were detected among infantry soldiers. There were some different finding in the fracture site and its clinical features from the previous foreign reports. 1. There were pain and local swelling in all cases as clinical manifestation. By physical examination, direct point tenderness on the location of the fractured metatarsal shaft was characteristic. 2. On roentgenographic examination, cortical fissuring or break was seen one week after onset of symptoms and external callus was seen from two weeks or at the least four weeks. Oblique view was more useful than AP view in the diagnosis of march fractures. 3. The third metatarsal was the most frequently involved site(7 cases, 48%). and the second metatarsal was Jess frequent(3 cases, 20%). This difference of frequent site with previous reports might be attributed to the relatively long shaft of the third metatarsal, but should be analyzed in further study. 4. The incidence of the development of march fracture was 1 per 104 infantry soldiers.
배영재,윤성일,Bae, Young-Jae,Yoon, Sung-Il 대한족부족관절학회 1998 대한족부족관절학회지 Vol.2 No.2
The fact that, under similar training activities performed in the same environment, march fractures develop in only a certain percentage of the trainees indicates that intrinsic factors are affecting the prevalence of these fractures. Among these intrinsic factors, the relation between foot arch type and the occurance of march fractures was investigated in this study. From 1997 to 1998, at one infantry medical company of infantry corps in Korea, 15 march fracture patients were detected among infantry soldiers. Quantitative measures of the foot arch (longitudinal) structure of 15(30feet) march fracture patients were established and compared with those of 15(30feet) normal person. The results were as follows. 1. From the lateral X-ray film, three parameters (i.e. calcaneal angle, forefoot angle, height to length ratio)were defined to describe the structure of the longitudinal arch of the foot. 2. The mean value of the calcaneal angle of march fracture group and normal control group showed 16.4 degree, 20.5 degree respectively. The difference between two groups was statistically significant (P>0.006), but those of forefoot angle and height to length ratio were not. 3. In the calcaneal angle twenty-six feet(87%) of march fracture group were lower than 17 degrees but twenty-five feet(83%) of normal control group were more than 17 degrees. That is, march fracture were more prevalent in feet with low calcaneal angle. 4. In the low arch foot, the orthotic device might relieve the energy load carried by the foot, thus reducing the incidence of march fractures, and should be analyzed in further study.
전류형 HVDC 성능 개선에 대한 연구 (STATCOM를 중점으로)
배영재 ( Young-jae Bae ),천관호 ( Kwan-ho Chun ) 사단법인 한국빅데이터서비스학회 2023 빅데이터서비스학회 논문집 Vol.1 No.2
Following Jeju Units 1 and 2, Korea’s HVDC system is planning HVDC between Jeju and the mainland, HVDC between Bukdangjin and Godeok, and HVDC on the east coast. In particular, the Bukdangjin-Godeok HVDC system has a Back to Back scheme characteristic, and when the HVDC Run-up function is activated when an event occurs, a problem occurs in which DC power does not rise to the target value due to low DC voltage. STATCOM was installed to solve the TOV (Temporary Over Voltage) problem on the Godeok side of the Bukdangjin-Godeok HVDC. Using a real-time system analysis simulator (RTDS), a voltage source model was installed on both ends of the HVDC and STATCOM was input into the inverter for simulation. Due to the characteristic of STATCOM trying to maintain the AC voltage, the DC power did not increase compared to before input, so by increasing the Vset voltage of STATCOM, the AC voltage and DC voltage were also increased, and it was confirmed that the DC power was output up to the target value. In the future, Using Korea’s electric system, a 765kV line is simulated to accurately simulate the set voltage of STATCOM when an event occurs, and when constructing an East Coast HVDC, the correlation between two HVDCs is needed to be simulated.
학령기 어린이를 위한 창의력과 상상력 증진 미술 어플리케이션
배영재(Young-Jae Bae),송수현(Su-Hyun Song),백태산(Tae-San Baek),김장훈(Jang-Hun Kim),박현주(Hyun-Joo Park) 한국엔터테인먼트산업학회 2024 한국엔터테인먼트산업학회 학술대회 논문집 Vol.2024 No.5
본 논문은 안드로이드 앱을 개발하여 주로 학령기의 아이들을 대상으로 하는 학습용 드로잉 앱의 기능을 소개하였다. 보통의 드로잉 앱과 다르게 정답이 없는 추상적 개념의 제시어를 통해 아이들이 스스로 고민하며 생각해봄으로써 흥미를 높일 수 있게하여 상상력과 창의력 발달 효과에 중점을 두었다. 본 연구의 과정은 앱 개발 관련 프로젝트 수행에 대한 사례로 제시하거나 간단한 교육과정으로 사용할 수 있다. This paper presents the features of a learning-oriented drawing app developed for school-aged children on the Android platform. Unlike conventional drawing apps, this application prompts children to engage in deep thinking and contemplation through abstract concepts that do not have definitive answers, thereby enhancing participation and fostering the development of imagination and creativity. This research can serve as a case study for app development projects and can be utilized in educational curricula, demonstrating its educational potential.
인체 표피 Langerhans 세포의 농축수호법과 자가 및 동종 임파구에 미치는 영향에 관한 연구
배영재(Young Jae Bae),허충림(Choong Rim Haw) 대한피부과학회 1987 大韓皮膚科學會誌 Vol.25 No.2
Separation of Langerhans cells in epidermis of 16 healthy Korean individuals were performcd. Separation of Langerhans cells by density gradient centrifugation on a colloidal sillica(percoll) polyvinilpyrrolidone gradient. And autologous, allogeneic mixed skin cell leukocyte culture reaction was done with each fractionatcd cpidermal cell suspensions. Also lymphocytes, epidermal cells was cultured in media alone, respectively. The results was quantitated by the incorporation of H-thymidine by p-liquid scintillation counter. The densities of I angerhans cells within the epidermal cells, fraction-2 was most higher concentration (22.0+2.8%) and fraction-5 was most lower concentration (3.4+ l.9%). 2. In the comparison of the results of Langehans cells enriched and depleted population in autologous mixed skin cell leukocyte culture reaction, the former was higher than the latter on lymphocyte stimulatory capacity. There was significant differences(p<0.005) And also same as result in allogeneic mixed skin cell leukocyte culture reaction. 3. Langerhans cells enriched fraction in this study was more lymphocyte stimulatory capacity than depleted fraction in allogeneic mixed skin cell leukocyte culture(p<0.01~0.05). Ailogeneic mixed skin cell leukocyte culture reaction was more lymphocyte stimulatory capacity than the autologous(p<0.005~0.05).
자가 이식편에 의한 전방십자인대 재건술의 실패요인 - 침해 ( Impingement ) 에 대하여 -
정영복,태석기,배영재 ( Yong Bok Jung,Suk Ki Tae,Young Jae Bae ) 대한슬관절학회 1995 대한슬관절학회지 Vol.7 No.2
The aim of this study was to investigate the influnce of impingement of the geaft by intercondylar roof to stability of the joint and clinical result after reconstruction of anterior cruciate ligament(ACL) with bone-patellar tendon-bone graft. Among 74 cases of ACL reconstruction were done by one tunnel arthroscopic technique from May l991 to February 1994,30 casas with excellent result and 4 cases with poor result were analysed by radiological measurements & stability assessed hy Lachiman test and KT-1000 arthrometer, OAK(Orthopadische Arbeitsgruppe Knie) knee score. Impingement was assessed by relationship between the locations of intersection points on tibial tunnel plateau rnade by the lines drawn along the tibial tunnel and the slope of femoral inteizondylar roof in full extension lateral roentgenogram. Impingement was defined as severe(group 1) which the line of tibial tunnel was in front of the line of intercondylar slope; moderate or non when the former was at the same point or behined the latter(group II). In addition to that, the degree of impingement was evaluated by dividing the distance between the intersection point of intercondylar slope line an anterior margin of tibial tunnel by the width of tibial tunnel, and expressed in terms of percentage. The were as follows; 1. There were 2 cases of group I(severe impingernent) and 32 cases of group II (moderate or no impingement) 2. Regarding the range of motion, one case of group I showed limitation of extension under l0 degrees, and one case of group II showed limitation of flexion under 15 degrees. 3. Lachman test was positive in one case of group I and 3 cases of group II, and negative in one case of y oup I illld 29 cases of group II. 4. Maximal manual displacement measured by KT-1000 arthrometer was 4.81.0 in group I and 1.0+- l.7 in group II(statistically significant difference al p&.00]). 5. The degree of impingement obtained by radiological measurement was 123% in group I and 34% in group lI(statistically significant difference at p=0.001), 6. Accarding to OAK criteria, one cases of group I and 29 cases group II showed excellent result, one case of group I and 3 cases of group II showed poor result. From above results, the presence and degree of impingement assessed by full extension lateral roentgewgram seems to have influence on the stability and clinical result after reconstruction of ACL by one tunnel arthrosccpic technique.