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고강도강재의 고온인장특성 및 용접시 잔류응력특징에 관한 연구
장경호,이진형,신영의 대한용접접합학회 2004 대한용접·접합학회지 Vol.22 No.4
In this study, high temperature tensile properties of high strength steels(POSTEN60, POSTEN80) were investigated. The three-dimensional thermal elastic-plastic analyses were conducted to investigate the characteristics of welding residual stresses in welds of high strength steels on the basis of thermal and mechanical properites at high temperature obtained from the experiment. According to the results, high temperature tensile strength of POSTEN60 steel deteriorated slowly to 10$0^{\circ}C$. As the temperature went up, the tensile strength became better because of blue shortness, and it deteriorated radically after reaching to the maximum value around 30$0^{\circ}C$. For the POSTEN80 steel, high temperature tensile strength deteriorated slowly to 20$0^{\circ}C$. As the temperature went up the tensile strength became better and it deteriorated slowly to $600^{\circ}C$ after reached to the maximum value around 30$0^{\circ}C$. Strain of high strength steels at the elevated temperature increased radically after the mercury rose to $600^{\circ}C$. The strain hardening ratio of POSTEN60 steel was larger then that of POSTEN80 steel at the elevated temperature as in the case at the room temperature and it became smaller radically after the mercury rose to 40$0^{\circ}C$. And, in the welding of high strength steels, increasing tensile strength of the steel (POSTEN60<POSTEN80) increased residual stress in welds.
장경호 대한건축학회 1980 建築 Vol.24 No.5
우리나라 삼국시대의 가람배치형성은 고구려의 청암리사지의 삼금당일탑식 가람에서 부터 시작되었다고 생각할 수 있다. 이 가람배치의 영향은 백제를 비롯하여 신라는 물론 일본까지 미쳤다. 이것을 시조로 백제의 일탑식가람에서 신라의 쌍탑식에 이르기까지 여러 형의 가람이 우리나라에 발생한다. 여기서는 특히 1976년부터 본격적 으로 발굴하기 시작하여 현재 까지 계속중인 황룡사지의 가람배치를 중심으로 우리나라 고대가람을 돌이켜 고찰하고저 한다.
장경호,Jang, Gyeong-Ho 대한건축사협회 1987 建築士 Vol.1987 No.8
우리나라에서 선사시대라고 하면 대체로 구석기 신석기시대를 비롯하여 청동기와 초기철기시대를 포함한다고 말할 수 있겠으나 그 시대의 건축을 논함에 있어서는 통틀어 원시시대의의 건축으로 표현하고자 한다.
2단계 자료포락분석을 통한 프로야구단의 상대적 효율성 분석 연구
장경호,김덕용,이현섭,강현민 한국체육과학회 2024 한국체육과학회지 Vol.33 No.1
The purpose of this study was to evaluate the relative managerial efficiency of 10 Korean professional baseball teams using two-stage data envelopment analysis(two-stage DEA). To analyze the relative efficiency, the player salary, regular season teams wins, and attendance were used as input, mediating, and output variables, respectively. The data were analyzed with the two-stage DEA using R program. The results of this study were as follows; First, KT was measured as a highly efficient team in the 2015 season, and LG was measured as highly efficient in the 2016-2019 and 2022 seasons. Second, Doosan, Hanwha, KIA, LG, Lotte, Samsung, SSG Should enhance output wins compare input player salary, While Kiwoom, NC, KT Should enhance the managerial efficiency by increasing the number of game attendance. From an overall perspective the relative efficiency of Korean professional baseball teams has been decreased in recent years, largely due to declining the number of attendance. It’s worth noting, especially for the 2022 season, that despite the return to normalcy following the end of the pandemic, the attendance has not been recovered to pre-COVID-19 levels as quickly as professional sports in the US or Europe. Therefore, in order to improve managerial efficiency, Korean professional baseball teams will need to develop active marketing strategies to increase the influx of spectators into stadiums, as well as effort to create and actively promote a hygienic and safe game viewing environment.