http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
중증 무지외반증에서 원위 중족골 갈매기 절골술과 근위 중족골 갈매기 절골술의 결과 비교
박형석,이준영,고강열,류제홍,임재환,Park, Hyung Seok,Lee, Jun Young,Ko, Kang Yeol,Ryu, Jehong,Lim, Jae Hwan 대한족부족관절학회 2020 대한족부족관절학회지 Vol.24 No.4
Purpose: This study compared the results of proximal and distal chevron osteotomy in patients with severe hallux valgus. Several recent studies have shown that the indications for distal metatarsal osteotomy with a distal soft-tissue procedure could be extended to include severe hallux valgus. Materials and Methods: This study analyzed 127 severe hallux valgus surgeries. Of these, 76 patients (76 feet) were excluded for lack of adequate follow-up and additional procedures (Akin procedure), leaving 51 patients (51 feet) in the study. The mean age of the patients was 58 years (21~83 years), and the mean follow-up duration was 18 months (12~32 months). The patients were divided into two groups. Group 1 underwent distal chevron osteotomy, and group 2 underwent proximal chevron osteotomy performed sequentially by a single surgeon. The patients were interviewed for the American Orthopaedic Foot and Ankle Society (AOFAS) score before and one year after surgery. The anteroposterior weight-bearing radiography of the foot was taken before and one year after surgery. Results: There were no significant differences in pain and function after one year in either group. Both groups experienced significant pain reduction and an increase in the AOFAS score. Significant improvement of the hallux valgus and intermetatarsal angle corrections was observed in both groups, and the sesamoid position was similar in each group. More improvement in radiographic correction of intermetatarsal angle was noted in group 2. Both procedures gave similar good clinical and radiological outcomes. Conclusion: This study suggests that a distal chevron osteotomy with a distal soft-tissue procedure is as effective and reliable a means of correcting severe hallux valgus as a proximal chevron osteotomy with a distal soft-tissue procedure.
박형석,Park, Hyeong-Seok Korean Chemical Society 1976 대한화학회지 Vol.20 No.4
액체분자는 고체와 같은 그리고 기체와 같은 자유도를 가진다는 가정하에 액체의 상태합을 유도하였다. 이 상태합을 아르곤, 염소, 암모니아, 벤젠 등의 액체에 적용하여 이들 액체의 열역학적 성질들을 계산한 결과가 실험치와 잘 일치하였다. A theory of liquid is proposed by assuming that the molecules in the liquid state have the solid-like and the gas-like degrees of freedom. The calculated values of the thermodynamic properties of argon, chlorine, ammonia and benzene are in good agreements with those of the observed values.
나노임프린트 리소그래피를 위한 스케일 다운된 산화막 스탬프 제작과 패턴결함 개선에 관한 연구
박형석,최우범,성만영,Park, Hyung-Seok,Choi, Woo-Beom,Sung, Man-Young 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.2
We have investigated pattern scaling down of silicon stamps through the oxidation technique, During oxidizing the silicon stamps, silicon dioxide that has 300 nm and 500 nm thickness was grown, and critical deformations were not observed in the patterns. There was positive effect to reduce size of patterns because vertical and horizontal patterns have different orientation. We achieved pattern reduction rate of $26\%$. In addition, the formation of polymer patterns had been investigated with varied temperature and pressure conditions to improve the filling characteristics of polymers during nanoimprint lithography when pattern sizes were few micrometers. In these varied conditions, polymers had been affected by free space compensation and elastic stress relaxation for filling the cavities. Based on the results, defect control which is an important issue in the nanoimprint lithography were facilitated.
액체의 구조에 관하여 -새로운 Parameter 결정법-
박형석,장세헌,Hyungsuk Park,Seihun Chang 대한화학회 1963 대한화학회지 Vol.7 No.2
The new method to determine the parameters in the liquid partition function of H. Eyring and co-workers is proposed, in which method the equilibrium condition of the three phases and the boundary condition of the liquid partition function at the triple point are used. The calculated thermodynamic properties using the new determined parameters are agreed well with the observed values.
박형석,장세헌,Hyungsuk Park,Seihun Chang 대한화학회 1963 대한화학회지 Vol.7 No.2
The partition function of liquid halogens is developed applying the significant liquid structure theory proposed by H. Eyring and co-workers. The parameters in the partition function are determined by triple point technique which was proposed by the authors in the previous paper, and also the thermodynamic properties and the surface tension are calculated by the method therein.
A New Approach to Significant Liquid Structure for Chemical Kinetics in Liquid Phase
박형석,Hyungsuk Park Korean Chemical Society 1969 대한화학회지 Vol.13 No.4
액체의 상태합을 유도하여 여러 가지 액체들의 적용하여 열역학적 성질들과 점성도를 계산하여여 측정치와의 좋은 일치를 보았다. 그리고 이 상태합을 써서 여러 성분으로 된 액체 용액의 상태합을 얻었으며 나아가서 액체 용액에서의 화학 반응 속도를 구할 수 있음을 보았다.
공공수요예측을 위한 계량적 모형정립에 관한 연구 (상)
박형석,Park, Hyeong-Seok 한국상하수도협회 1974 水道 Vol.1 No.-
공공수요의 적정한 예측만이 공급계획에 차질 없는 적정한 생산시설이 가능하므로 대단위화하여 가는 급수수요에서도 그 적정한 예측이 선행되어야 하겠다. 본 논문은 서울대학교 환경대학원 제5회 졸업논문을 간추린 것으로 상.하로 분하여 연재한다.