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.-

IS 서비스에 대한 사용자 기대와 인식의 차이가 사용자 만족도에 미치는 영향

박재용 한국기업경영학회 1999 기업경영연구 Vol.6 No.2

Information systems are being developed by many organizations in an attempt to improve organizational effectiveness and efficiency. And the role of the IS department within the organization has broadened considerably over the last decade. Once primarily a developer and operator of information systems, the IS department now has a much broader role. The introduction of personal computers results in more users of information technology interacting with the IS department more often. IS departments now provide a wider range of services to their users. They have expended their from product developers and operations managers to become service providers. The result of the analysis shows that the gap betweenexpectations and Perceptions of users will have an negative impact on the user satisfaction of IS. And outsourcing strategy will have an impact on the user gap. The most important outcome of this study is that service quality is an antecedent of IS users, and we should consider service quality in improving and measuring IS effectiveness.

공공보건의료정책 및 노인장기요양보장정책의 과제

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

회계정보 표현의 양식차이가 의사결정 정확성에 미치는 영향에 관한 실증적 연구

박재용 한국기업경영학회 2000 기업경영연구 Vol.7 No.2

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.

몸통의 안정성(core stability)과 운동손상

박재용 대한운동사협회 2011 대한운동사협회 워크숍자료집 Vol.32 No.-

6세기 고대일본 백제계 渡倭人과 불교

박재용 공주대학교 백제문화연구소 2014 백제문화 Vol.1 No.50

The mid-sixth century, the problem is that the acceptance of Buddhism in Japan, an influential clan Sogasi(蘇我氏) and Mononobesi(物部氏) are fighting to expand the sphere of influence become cause in Kinai(畿內). In addition, the introduction of advanced culture in Kawachi(河内) contributed greatly to the development of relations with the emigrants from Baekje(百濟) of Japan changes were the cause of that one. The emigrants from Baekje(百濟系 渡倭人) is 5-6 over the centuries to go to Japan through Baekje and continuous flow Waeguk(倭國) developed within Buddhism. Foreign trade routes in the early hanae Mononobesi was the control and subsequent proliferation of Sogasi's power gradually became full-fledged confrontation of the two clans. Sogasi entered the goal area during Kawachi to actively recruit the emigrants from Baekje also had to accept Buddhism. Through this relationship with Sogasi and the Emperor's family and sought a new basis for gearing. Eventually the Asuka period in ancient Japanese Buddhism was flourishing that can be deployed to the emigrants from Baekje in Kawachi was possible because of very bigger role. 6세기 중반 왜국의 불교수용 문제는 畿內 유력씨족인 蘇我氏와 物部氏가 본격적으로 세력권을 다투게 된 계기가 되었다. 이와 함께 河內지역에서 선진문화의 도입과 발전에 크게 공헌하던 백제계 도왜씨족들과의 관계변화도 그 하나의 원인이 되었다. 하내지역의 백제계 도왜씨족은 5~6세기 걸쳐 일본열도로 건너가서 백제와의 지속적인 교류를 통해 왜국 내 불교를 발전시켰다. 초기 하내 지역의 대외창구는 물부씨가 통제하고 있었으며, 이후 소아씨의 세력이 점차 확산되면서 양자의 대립이 본격화되었다. 소아씨의 하내지역 진출 목적 가운데는 백제계 도왜씨족을 포섭하여 적극적으로 불교를 수용하는 것도 있었다. 이를 통해서 소아씨는 대왕가와의 관계를 유지하고 새로운 기반을 다지고자 했던 것이다. 결국 고대 일본의 飛鳥時代에 불교가 융성하게 전개될 수 있었던 것은 하내 지역의 백제계 도왜씨족들의 역할이 매우 컸기에 가능했던 것이다.

21 세기 한국 사회보장의 재정과 개혁 / 기획주제 : 복지재정과 복지개혁 ; 제 4 주제 / 건강보험의 제도변화와 재정 안정화 - 발표

박재용 한국사회보장학회 2001 2001년도 한국사회보장학회 춘계학술발표회 Vol.- No.-

실험용 지진계의 개발 및 지구 과학 탐구 도구로서의 활용 가능성 탐색

박재용 한국현장과학교육학회 2019 현장과학교육 Vol.13 No.4

Seismometers installed in seismic stations today measure ground vibrations with changes in the intensity of induced current caused by the movement of magnet. However, current seismometers in textbooks do not show the principles of modern seismometers, and even the educational seismometers dealing with the principles of modern seismometers have a complicated structure that makes it difficult for students to understand how seismometers work. In this study, I developed an experimental seismometer that detects ground vibrations using micro-currents generated by the relative motion of magnet and coils, and explored its applicability for investigation tool in earth science. As a result of the performance test on the experimental seismometer, the induced currents of different magnitude were generated in the coils of the experimental seismometer according to the vibration intensity, and the pattern of magnitude change of the acceleration due to the vibration of the vibration generating device was consistent with the pattern of intensity change of induced current in the coils of the seismometer. In addition, a survey of pre-service and in-service teachers showed that the experimental seismometer was more suitable for use as an investigation tool than an existing educational seismometer. The results of this study suggest that the experimental seismometer can be used as an investigation tool in earth science classroom to learn the basic principles of modern seismometers and to improve science process skills. 오늘날 지진관측소에 설치된 지진계는 자석의 움직임에 의해 유도된 전류의 세기 변화로 지반의 진동을 측정하고 있다. 그러나 현재 교과서에 수록된 지진계는 현대식 지진계의 원리를 보여주고 있지 못하며, 현대식 지진계의 원리를 다룬 교육용 지진계의 경우에도 그 구조가 복잡하여 학생들이 지진계의 작동 원리를 이해하기가 쉽지 않다는 문제가 있다. 이 연구에서는 자석과 코일의 상대운동으로 발생한 미세 전류를 이용하여 지반의 진동을 감지하는 실험용 지진계를 개발하고, 지구과학 탐구 도구로서 실험용 지진계의 활용 가능성을 살펴보았다. 실험용 지진계에 대한 성능시험 결과, 진동의 세기에 따라 실험용 지진계의 코일에 크기가 다른 유도 전류가 발생하였고, 진동 발생 장치의 진동에 의한 가속도의 크기 변화와 지진계의 코일에 유도된 전류의 세기 변화 패턴이 일치하였다. 또한, 예비교사와 현직교사들을 대상으로 탐구 측면에서 실험용 지진계 사용의 적합성 여부를 조사한 결과, 실험용 지진계가 기존 교육용 지진계보다 탐구 도구로 사용하기에 더 적합한 것으로 나타났다. 이러한 연구 결과는 지구과학 수업에서 실험용 지진계를 현대식 지진계의 기본 원리를 익히고 과학 탐구 기능을 향상시키기 위한 탐구 도구로 활용할 수 있음을 시사한다.