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.

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.

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

박재용 (사)방송기자연합회 2014 방송기자 Vol.16 No.-

데이터 베이스 프로그래밍을 위한 언어 설계에 관한 연구

박재용 한국기업경영학회 1998 기업경영연구 Vol.5 No.2

The theory of structured techniques in the development of software has been used from the middle of 1970s to th 1980s. The purpose of this paper is to design a language for database programming. This paper presents a method to design and implement a recovery manager in object-oriented database systems. Data in object-oriented databases may be considered to be either short objects or the long objects that have their own different properties so that the system should provide two different recovery mechanisms to maximize the efficiency. To select the most appropriate recovery mechanism for each of the two objects, the advantages and disadvantages of the conventional recovery mechanisms are surveyed. Based on this, the paper suggests a logging mechanism for the short objects and a shadowing mechanism for the long objects.

운동 형태가 운동능력 및 정적 안정성에 미치는 영향에 관한 연구

박재용,송영주 한국운동재활복지협회 2023 운동재활·복지 Vol.4 No.3

본 연구는 정적 스포츠인 엘리트 소총 사격 남자선수의 운동능력 및 정적 안정성 요인들에 대해서 일반인 및 동적 스포츠 참여 선수와 비교·분석하였다. 연구대상자는 일반 남자대학생을 대조군(Con, n= 14), 엘리트 축구선수(Soc, n= 9), 엘리트 남자 소총 사격선수(Rif, n= 10)로 분류하였다. 측정 및 분석 결과, 유산소 운동능력 요인에서 총 운동시간(p<.01), O2max(p<.01), AT발현시점(p<.01), O2@AT(p<.01) 및 HR@AT(p<.05)에서 모두 Rif가 Soc에 비해 유의하게 낮은 것으로 나타났다. 고관절 근기능에서는 외전력(p<.01), 굴곡력(p<.01), 신전력(p<.01)에서 양측 모두 모두Rif가 Soc에 비해 유의하게 낮은 것으로 나타났다. 그리고 정적 안정성 요인에서는 좌우측 차에서Rif가 Soc와 Con에 비하여 각각 유의하게 높은 것으로 나타났다(p<.05). 본 연구를 통해 엘리트 남자 소총 사격선수는 유산소 운동능력, 고관절 근기능 및 정적 안정성요인들의 수준이 낮은 것으로 나타나 심폐순환 능력과 근기능 향상을 위한 고강도 인터벌 트레이닝 및 근력 트레이닝 뿐만 아니라 자세교정을 위한 운동이 복합적으로 구성된 트레이닝 프로그램의 구성과 적극적인 현장적용이 필요할 것으로 생각된다 This study conducted a comparative analysis of the physical fitness and static stability factors of elite male rifle shooting athletes, who engage in a static sport, in comparison to both the general population and dynamic sports participants. The study subjects were classified as follows: a control group (Con) consisting of ordinary male college students (n=14), elite soccer players (Soc, n=9), and elite male rifle shooting athletes (Rif, n=10). Rif showed significantly lower total exercise time (p<.01), O2max (p<.01), AT onset point (p<.01), O2@AT (p<.01), and HR@AT (p<.05) compared to Soc. In hip joint muscle function, Rif demonstrated significantly lower values than Soc on both sides in terms of external rotation strength (p<.01), flexion strength (p<.01), and abduction strength (p<.01). Additionally, in static stability factors, Rif showed significantly higher left-right differences compared to Soc and Con (p<.05). From these results, it was found that elite male rifle shooting athletes have lower levels of aerobic exercise capacity, hip joint muscle function, and static stability factors. To improve cardiovascular fitness and muscle function, it was suggested that a comprehensive training program to be developed including high-intensity interval training, strength training, and posture correction exercises.

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.

오징어회를 먹고 발생한 구강 아니사키스증

박재용,박영준,고한성,송용진 대한이비인후과학회 2006 대한이비인후과학회지 두경부외과학 Vol.49 No.7

Anisakiasis is a disease caused by human infection by the Anisakis larvae, a marine nematode found in raw or undercooked fish. Most of anisakiasis are found in gastric or intestinal mucosa, but Anisakiasis in the oral cavity is rare. So, we elaborate on it in the present report with a review of literatures. This is the first report about anisakiasis of oral cavity in the recent literatures in Korea. (Korean J Otolaryngol 2006;49:763-5)

한글 BASIC 프로그래밍 언어의 유효성 분석에 관한 연구

박재용 한국기업경영학회 1998 기업경영연구 Vol.5 No.1

The purpose of this study was to develop the Hangul programming language and compare persons which learnd programming language by using Hangul programming language with persons who by using traditional programming language. The hypotheses are as follows : Hypothesis 1 : Hangul programming language group will receive significantly higher scores on achievement then those of traditional programming language group. Hypothesis 2 : In the Hangul programming language groups, the group which do not know English before will receive significantly higher scores on achievement then those of group which understatand English already. The subjects of this study were sixth grade persons at a primary school and first grade persons at the inhavitants of in Seoul. The tools used in this study were achievement test and questionnaire. The statistics were processed with t-test by SPSS package. The findings of this study are as follows : First, persons of Hangul programming language group received significantly higher scores (t=5.14, p<0.005) on achievement than those of traditional programming language group from primary school children. Second, persons of Hangul programming language group was not significantly different on scores from the inhavitants of in Seoul. Third, the result of questionnaire showed that Hangul programming language have good effacts, in making persons who do not know English at all understand computer programming.

웹기반의 회계정보시스템 프로그래밍

박재용 한국경영교육학회 1999 경영교육연구 Vol.17 No.-

HTML 언어를 이용한 가상강좌 프로그래밍에 관한 연구

박재용 한국세무회계학회 1998 세무회계연구 Vol.5 No.1

본 연구에서는 향후 가상대학에서 구축하여야 할 가상강좌에 따른 강의실 구조와 운용사례를 소개한다. 이는 정보중심대학으로 발돋움하고 있는 본 대학에서 시범적으로 시행한 가상강좌의 전면적인 운용을 위한 선험적인 연구로서 HTML언어를 이용하여 WWW상의 교과목 홈페이지 구상을 소개하였다. 특히 본 대학에서 시범적으로 운영한 실질적인 사례를 소개함으로써 향후 가상시대에 일반화 될 가상대학의 운영을 위한 교수들에게 실질적인 운영모델을 제시한 것이다. 이를 통하여 본 연구에서는 이를 바탕으로 가상강좌 개설을 위한 교수들에게 대한 동기부여 및 운영 프로그래밍에 대한 자신감을 고취하는데 기여하고자 하였다. 그러나 이의 실시에 따른 문제점에 대한 대책으로 향후 가상강좌의 목표를 효율적으로 달성하기 위한 현실적인 방안은 완전히 개념적인 가상강의실에서만 강의가 이루어지는 것 보다는 정규수업과 병행해서 이루어져야 한다. 왜냐하면 현행 추진되고 있는 가상대학의 설립 및 운영은 평생교육의 한 방편으로 활용될 가능성이 크므로 정규 수업에서 활용할 수 있는 전면적인 모델로는 부적절하다는 견해도 있기 때문이다. 특히, 아직 우리나라의 경우 학벌위주의 사회적, 문화적 인식이 팽배해 있을 뿐만 아니라 가상대학에 대한 인식이 저조한 수준이므로 가상대학 또는 가상강좌에 대한 학점이수를 현실적으로 각 기업이나 조직에서 인정하지 않는 것도 해결과제로 남아 있기 때문이다. 따라서 가상대학의 운영에 필요한 모든 사회, 문화적, 시스템적 환경이 갖추어지더라도 현재와 같은 캠퍼스 중심의 대학을 능가할 수는 없다. 그러나 가상대학은 교육형태의 새로운 모델로 제시되어 나름대로의 교육적 가치는 존속할 것으로 본다.