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.

의료인력(醫療人力)의 지역간(地域間) 분포양상(分布樣相)과 결정요인(決定要因)

박재용,Park, Jae-Yong 한국개발연구원 1983 韓國 開發 硏究 Vol.5 No.2

국방 표준/규격 체계 개선방안 연구

박재용,최석철,Park, Jae-Yong,Choi, Seok-Cheol 한국국방경영분석학회 2009 한국국방경영분석학회지 Vol.35 No.1

우리나라의 과학기술은 선진국 수준에 이르고 있지만, 이를 뒷받침하는 표준/규격 분야는 그 수준에 못 미치고 있다. 이를 극복하기 위해서 본 연구에서는 미국 규격체계의 발전 동향과 우리나라의 국가표준(KS, KlCS) 및 국내민간 규격체계에 대해서 살펴보았다. 이를 바탕으로 국내 국방 표준/규격 체계의 현 실태를 분석하고 3가지 측면에서 개선방안을 제시하였다. 첫째, 국방표준 분류체계 분야에서는 국방 분야에서 표준, 규격, 핸드북을 명확하게 정의하고 국방 표준과 국방 핸드북의 제정대상을 식별하였다. 둘째, 국방표준 제정절차 분야에서는 민간주도(상향식)형의 표준/규격 제정절차를 제시하였고, 마지막으로 '국방규격작성 표준지침' 분야에서는 국방 표준, 규격, 핸드북의 표기법 및 현재 도면번호 체계의 한계를 극복할 수 있는 개선안을 제시하였다. Recently, the level of science and technology in our country has reached the level of the advanced countries. However, the level of standards/specifications was insufficient for support. In this study, after a review of the international atmosphere on defense specifications/standards and an investigation of the domestic present situation, three different perspectives of improvement scheme for the defense specifications/standard system are presented. First, in the defense standard classification system perspective, specifications, standards and handbook were defined based on their characteristic and properties. Second, in the perspective concerning the establishment procedure of defense standards/specifications, the bottom-up approach was suggested. Finally, in the perspective of the 'defense standards/specifications instructions', a reinforced drawing number system and other factors to overcome the current limitations are provided.

도시 가계의료비 지출의 추이와 예측

박재용,남시현,Park, Jae-Yong,Nam, Si-Hyun 대한예방의학회 1995 예방의학회지 Vol.28 No.2

The increase of health care expenditures is an important problem in the almost countries. Also, suppression of the health care expenditures is an important problem in the health field of Korea since the national health insurance for total people in 1989. Thus, it is very important to grasp the change of the health care expenditures of family and proportions of the health care expenditures to total expenditures of family, because they are the basis of national health care expenditures in Korea. While the health care expenditures of urban family were increased during 1980-1993 by 12.8% annually, the total expenditures of urban family were increased by 14.8% annually. Consequently, the proportions of health care expenditures to total expenditures were decreased from 5.98% to 4.76%. The proportions of health care expenditure for 3 years to come were predicted to 4.75% in 1994, 4.67% in 1995, and 4.63% in 1996 by the time-series analysis. That is, it was predicted that they would be decreasing slowly. The product elasticity of health care expenditure was less than 1 in the multiple regression analysis. so the health care is normal good rather than superior good. Therefore, it seems that the household economy is able to bear the expense pursuing the improvement of quality of health care by actualizing the medical insurance fee.

계열별 프로그래밍 언어의 활용도에 관한 차이분석 -경영계열을 중심으로-

박재용,Park Jae-Yong 대한경영정보학회 1998 경영과 정보연구 Vol.2 No.-

The purpose of this study was to analyze the differences of application level the computer programming languages in major. The method of this study is the empirical method based on theoretical one with the previous bibliographical suduies. The sample consists of 268 listed university disclosing over the period of Dec. 1. 1997 to Du. 15. 1997. The samples were 10 university in university of Seoul, Pusan, Masan City, Korea. The data were collected by questionnaire research through interview with each person. The analysis data was carried to 268 samples by using SPSS/PC for Windows Version 7.5 statistical package. Statistical methods such as frequency analysis, chi-square test, ANOVA test, correlation analysis were used to test the research questions. This paper focuses on the design of the hypothesis test show that the 2 type are significantly different in major of university students. Before the test of research questions performed it frequency analysis by using the factor score that bring each items. The research type of 2 guoups, that is, BA Group(business administration group) and NBA Group(non-business administration guoup). To summarize the result of this study is as follows ; (1) Hypothesis 1 : Concerning about computer programming language in major, the significant difference is application the present condition. (2) Hypothesis 2 : Concerning about computer programming language in major, the significant difference is application level. (3) Hypothesis 3 : Concerning about each application software in major, the significant difference is application level. According to the results of this study, it is found that (1) Hypothesis 1 related In application the present condition of computer programming language was accepted its all at 0.05 % significance level. (2) Hypothesis 2 related to application level of computer programming language was accepted its all at 0.05 % significance level. (3) Hypothesis 3 related to application level of each application software was rejected its all. at 0.05 % significance level.

스티칭에 의한 유리섬유강화 복합재료의 물성 및 충격거동 변화

박재용,강태진,육종일,Park, Jae-Yong,Kang, Tae-Jin,Yuk, Jong-Il 한국재료학회 1992 한국재료학회지 Vol.2 No.5

Mechanical and impact properties of stitched S2 glass fiber reinforced polyester woven laminates composites have been studied. Laminates were stitched using Kevlar 49 thread with 1/2, 1, and 2 inch stitch spacing. Tensile and 3-point bending tests haute been performed to evaluate the mechanical properties of stitched and unstitched laminates. Impact tests at applied energy of 234.7J were performed to examine the impact behavior and toughness changes of the specimen. The same specimens were also tested repeatedly at low impact energy level of 110.2J for 3 times to evaluate damage tolerance properties. The tensile and 3-point bending test results showed that one inch spacing specimen had the highest tensile and flexural strength. It also showed the highest energy absorption capability and the best damage tolerance property at the repeated impact test. The half inch spacing specimen showed the lowest tensile strength and energy absorption property at the impact energy level of 234.7J, even though it had the highest frequency of stitching thread. S-2유리섬유직물과 폴리에스터 수지로 구성된 적충복합재료를 케블라 49 Thread로 1/2인치, 1인치 2인치 간격으로 스티칭하여 스티칭 간격에 따른 물성과 충격 강도의 변화로부터 최적스티칭 조건을 구하였으며 또한 스티칭하지 않은 적층복합재료와의 물성차를 비교연구하였다. 인장실험과 3점굽힘실험을 통해 시편의 종류별 기본 물성을 알아보았고, 234.7J의 충격에너지를 가해 시편의 파단 현상과 에너지 흡수 능력을 조사하였다. 파단에너지의 약 50% 정도인 110.2J의 충격에너지로 3회 반복실험하여 시편의 손상정도와 충격강도를 비교 검토하였다. 인장실험과 굽힘 실험의 결과 1인치 간격으로 스티칭한 시편이 가장 높은 강도를 보였으며, 충격실험에서도 가장 뛰어난 에너지 흡수능력 및 손상에 대한 저항을 보였다. 반복충격 실험의 결과 스티칭하지 않은 시편은 현저한 충격강도의 감소를 보인 반면 스티칭한 시편은 반복충격에도 에너지 흡수능력이 우수하게 유지되었다. C-scanning으로 손상부위를 관찰한 결과 스티칭으로 인해 손상영역의 확산이 억제되어 현저히 감소함을 보여주었다. 스티칭 간격이 너무 조밀한 경우 강도의 향상보다는 스티칭으로 인한 손상이 더 커져서 1/2인치 간격으로 스티팅한 시편의 경우는 인장강력이나 충격에너지 흡수가 스티칭하지 않은 시편에 비해 오히려 감소하는 결과를 나타내었다. 그러나 이러한 감소에도 불구하고 외부충격에 의한 손상영역의 확산은 효과적으로 억제되어 국부적인 손상만이 발생함을 알 수 있었다.

공공보건의료정책 및 노인장기요양보장정책의 과제

박재용,Park, Jae-Yong 대한병원협회 2004 대한병원협회지 Vol.33 No.1

자가늑골연골이식을 이용한 제 5중족족지관절재건술

박재용,강화준,Park, Jae-Yong,Kang, Hwa-Jun 대한족부족관절학회 2013 대한족부족관절학회지 Vol.17 No.2

The treatment of open, traumatic intraarticular injuries to the metatarsophalangeal joint with severe articular comminution and cartilage defect of metatarsal head is a challenge to the foot surgeon. We report the joint reconstruction treating the injured joint by autogenic costal osteochondral graft with satisfactory outcome.

회계정보의 표현양식이 의사결정자의 예측정확성에 미치는 영향에 관한 연구

박재용,박성규,Park Jae-Yong,Park Seong-Kyu 대한경영정보학회 2000 경영과 정보연구 Vol.4 No.-

The purpose of this study is to investigate the level of correctness accounting information with the two alternative forms of presenting information outputs. Specifically two different methods of presenting accounting information, the table form and the graphical form were employed to test the level of correctness of the accounting information user's decision making. Using college students as a surrogate decision maker, this research have found that there is no statistically significant difference in the correctness of decision making between the two groups, one group using the table form of accounting information and another group using the graphical form of accounting information.

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.