체적제어를 이용한 신뢰성 기반 위상 최적화

박재용,황승민,임민규,오영규,박재용,한석영 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-

This paper presents a reliability-based topology optimization (RBTO) using bi-directional evolutionary structural optimization (BESO). An actual design involves uncertain conditions such as material property, operational load and dimensional variation. Deterministic topology optimization (DTO) is obtained without considering of uncertainties related to the uncertainty parameters. However, the RBTO can consider the uncertainty variables because it has the probabilistic constraints. In this paper, the reliability index approach (RIA) is adopted to evaluate the probabilistic constraint. RBTO based on BESO starting from various design domains produces a similar optimal topology each other. Numerical examples are presented to compare the DTO with the RBTO.

신뢰성 해석을 이용한 차량 후드 보강재의 위상최적화

박재용,임민규,오영규,박재용,한석영,Park, Jae-Yong,Im, Min-Kyu,Oh, Young-Kyu,Park, Jae-Yong,Han, Seog-Young 한국생산제조학회 2010 한국생산제조학회지 Vol.25 No.5

Reliability-based topology optimization (RBTO) is to get an optimal topology satisfying uncertainties of design variables. In this study, reliability-based topology optimization method is applied to the inner reinforcement of vehicle's hood based on BESO. A multi-objective topology optimization technique was implemented to obtain optimal topology of the inner reinforcement of the hood. considering the static stiffness of bending and torsion as well as natural frequency. Performance measure approach (PMA), which has probabilistic constraints that are formulated in terms of the reliability index, is adopted to evaluate the probabilistic constraints. To evaluate the obtained optimal topology by RBTO, it is compared with that of DTO of the inner reinforcement of the hood. It is found that the more suitable topology is obtained through RBTO than DTO even though the final volume of RBTO is a little bit larger than that of DTO. From the result, multiobjective optimization technique based on the BESO can be applied very effectively in topology optimization for vehicle's hood reinforcement considering the static stiffness of bending and torsion as well as natural frequency.

[기획다큐부문_제63회 이달의 방송기자상] 정말 그럴까? 합리적 의문과 불편한 진실

박재용 (사)방송기자연합회 2014 방송기자 Vol.16 No.-

한반도 평화정착을 위한 정전체제의 이해

박재용 한국방위산업진흥회 2018 國防과 技術 Vol.- No.468

Chronic ankle instability aggravate muscle functions of the hip and ankle joint in Hapkido practitioners aged 20s

박재용,송영주 한국웰니스학회 2017 한국웰니스학회지 Vol.12 No.3

Purpose: The purpose of this study was to assess the hip and ankle muscle function of the involved and the non-involved (unaffected) sides in Hapkido practitioners with chronic ankle instability. Subjects and Methods: Hapkido practitioners was conducted in males (n=8) with unilateral chronic ankle instability, who were aged in their 20s. Mann-Whitney were used to analyse the differences between the non-injured and the injured side in Hapkido practitioners with chronic ankle instability. A statistical significance level (α) of .05 was used. Results: The hip adductor muscle function of the involved side was significantly poorer than that of the non-involved side 30°/sec [peak torque% body weight (p <.05)] and 180°/sec [peak torque and peak torque% body weight (p <.01)]. The ankle evertor muscle function of the involved side compared to the non-involved side in all variables (peak torque, peak torque% body weight, and total work) were significantly less on 30°/sec and 120°/sec (p <.01). The ankle invertor muscle function of the involved side compared to the non-involved side in peak torque% body weight were significantly less on 30°/sec (p <.01). In addition, the ankle plantar flexor muscle function of the involved side was significantly worse than that of the non-involved side at 30°/sec (peak torque, peak torque% body weight, and total work [p <.01)] and 120°/sec [total work (p <.01)]. Conclusions: This study provides evidence that chronic ankle instability needs a comprehensive therapeutic approach to help prevent recurrence by addressing mechanical and functional instability.

2018년 지방재정제도 운용 방향

박재용 한국지방재정공제회 2018 지방재정 Vol.2018 No.1

정보통신 시장개방과 R&D 조직의 전략적 효과성 분석

박재용 경희대학교 사회과학대학 1997 社會 科學 論叢 Vol.15 No.-

장기분지 내 확률론적 이산화탄소 거동 예측 수치 모델링을 위한 다양한 암상 정보 업-스케일링 방법 비교 분석 및 평가

박재용,이성호,이용일,김중휘,김준모 대한지질공학회 2017 대한지질공학회 학술발표회논문집 Vol.2017 No.2

만성 족관절 불안정증에서 건이식을 이용한 외측 인대 재건술의 적응증

박재용,최기원,조재호,강찬,최경진,정진화,김학준,배서영,차승도,김기천,한승환,2015 대한족부족관절학회 보험장애판정위원회,Park, Jae Yong,Choi, Gi-Won,Cho, Jae-ho,Kang, Chan,Choi, Kyungjin,Chung, Jin-Wha,Kim, Hak Jun,Bae, Su-Young,Cha, Seung-Do,Kim, Ki Ch 대한족부족관절학회 2016 대한족부족관절학회지 Vol.20 No.1

Purpose: The purpose of this study is to review the indications of ankle lateral complex reconstruction using tendon graft. Materials and Methods: We searched PubMed using the index, "ankle, instability, lateral ligament, reconstruction" from 1990 to present (September 30, 2015). We excluded 1) modified Brőstrom operation (MBO), 2) conventional tenodesis surgery, 3) review article, 4) technical note, and 5) articles written in another foreign language. We reviewed 24 papers through the publication events, operational method, the indications of surgery, and the specific features of the patient group. Results: There were the indications of 1) previous ligament surgery failure, 2) situation when ligament repair is impossible due to the ligament defect, 3) severe instability (preoperative talar tilt >$15^{\circ}$, anterior draw >10 mm or the difference of contralateral side talar tilt >$5^{\circ}$, anterior draw >3 mm), and 4) overweight (body mass index >$30kg/m^2$). Other considerations included 1) generalized joint laxity and 2) workers, highly-demanded or athlete highly-affected by instability. Conclusion: The ankle lateral complex reconstruction using tendon graft could be indicated in patients with the possibility of MBO failure with several considerations.

醫藥品의 生産과 消費額推移

朴宰用,裵恩鎬 慶北大學校 醫科大學 1985 慶北醫大誌 Vol.26 No.3

1961년부터 1983년까지의 완제의약품의 생산 및 수출입 실적자료를 토대로, 소비액을 산출(소비액=생산액+수입액-수출액)하여 완제의약품의 생산 및 소비액의 년도별 추이를 고찰하고 생산과 소비에 영향을 미칠 수 있는 보건·사회적 변수를 선정하여 그 요인을 분석하고, 완제의약품의 생산 및 소비액의 추계를 위한 방정식을 유도한 결과는 다음과 같이 요약할 수 있다. 완제의약품 생산액의 년평균 증가율은 14.1%로 소비액의 13.7% 보다 높게 나타나고 있다. GNP에 대한 완제의약품생산액 비중은 1961년에 0.63%, 1970년에 1.18%, 1983년에는 1.96%로 매년 증가되어 왔다. 그리고 GNP에 대한 소비액비중은 1961년에 0.69%, 1970년 1.19%, 1983년에 1.97로 나타났다. 완제의약품의 생산액을 중추신경계용약, 호흡기계용약, 소화기계용약, 비타민제, 자양·강장·변질제 항생물질제제, 마약 및 기타 의약품의 8가지 효능군으로 분류해서 각 효능별 생산액 추이를 보면 1961∼83년간 년평균 증가율은 호흡기계 용약이 19.7%로 가장 높고 항생물질제제 14.6%, 자양·강장·변질제 14.5%의 순으로 되어 있다. 완제의약품의 생산 및 소비액과 이에 영향을 미칠 수 있을 것으로 생각되는 변수들간의 상관관계를 보면 국민 1인당 생산액과 소비액은 도시화율과는 거의 상관이 없으며, 나머지 변수들과는 높은 정상관관계를 보이고 있다. 선정된 변수들을 양대수회귀분석(logarithmetic regression analysis)한 결과, 국민 1인당 생산액에 대해서는 국민 1인당 GNP, 1일평균 병원입원환자수, 의약품실질가격지수, 1인당 의사수, 1인당 약국수, 1인당 병원병상수 등 6개 변수들이 98.3%의 높은 설명력을 보이고 있으며, 1인당 GNP 및 의약품실질가격지수의 탄력치는 0.5590 및 -0.5219로서 의약품의 생산은 소득, 가격 모두에 대해서 비탄력적으로 나타났따. 완제의약품의 국민 1인당 소비액에 대해서는 1인당 GNP, 일일평균 병원입원환자수, 의약품실질가격지수, 1인당 의사수, 1인당 약국수, 1인당 병원병상수, 도시화율, 65세 이상 인구비율 등 8개 변수들이 98.2%의 설명력을 보이고 있다. 국민 1인당 GNP만으로서 완제의약품의 생산액 및 소비액과의 관계를 보면 1인당 생산액에 대한 1인당 GNP의 탄력치는 1.4956, 1인당 소비액에 대해서는 1.4536의 탄력치를 보여 의약품의 생산 및 소비액에 대해 GNP는 매우 탄력적으로 나타나 다른 변수를 첨가하였을 때와는 차이를 보였다. 이상의 결과에서 완제의약품의 생산과 소비액이 해마다 증가하고 있고 GNP에 대한 비중도 점차 증가하여, 소비형태가 중진국의 정점에 와 있으므로 선진국으로 이행하는 시기에 대비해서 의약품을 옳바르게 생산하고 적절하게 소비할 수 있도록 적극적인 계몽과 홍보활동이 보건교육과 함께 병행되어야 할 것으로 생각된다. This study was attempted to analyze the transition of production and consumption by accounting consumption quantities based on production, import and export quantities of finished drugs from 1961 to 1983 in Korea (consumption=production+import-export). Selecting social and health variables which can have influence on production and consumption of drugs, observed the correlation matrix among the variables and results of regression analysis are follows; Annual average increasing rate of production and consumption of finished drugs represented that consumption is 13.7%, production is 14.1%. Production proportions of finished drugs in GNP were increasing annually as 0.63% in 1961, 1.18% in 1970, 1.96% in 1983 and consumption proportion were increasing as 0.69% in 1961, 1.19% in 1970, 1.97% in 1983. In production tendancy of finished drugs classified by utility that of central nervous drugs, respiratories, Digestives, Vitamins, neutrient and tonic alternatives, antibiotics, narcotics and else of drugs; the annual average increasing rate of the respiratory drugs(19.7%) were highest, the second was that of antibiotics (14.6%) in 1961-83. The results enable that production per capita and consumption per capita were non-correlated with urbanization and the other variables were higher correlated. According to logarithmetic regression analysis by dependant variables; per capita GNP, daily average number of in-patients, price index, number of physicians per capita, hospital beds per capita. The result that those variables explain the production per capita as 98.3%. Urbanization and population ratio over 65 years old with pre-variables explain the capita consumption per capita as 98.2%. Elasticity of only GNP per capita for production per capita indicated 1.4956 and consumption per capita indicated 1.4536 which are elastic.