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Kabsoo Lee,Hyuckmoon Gil,Xiaozhe Lu,Young-Doo Kwon 한국강구조학회 2014 International Journal of Steel Structures Vol.14 No.3
Many small dams have recently been constructed on several major rivers in the Republic of Korea to utilize these waterresources and control water flows. One such water body is the Gangjeong reservoir in the Nakdong River; a rising sector gatewas mounted on this reservoir. The finite element analysis (FEA) confirmed the empirical design of the gate to be safe withminor modifications. However, the positions of the horizontal girders are critical in the design of a gate, and it is must bedetermined by a trial-and-error process. To find the optimal solution for the positions and thicknesses of horizontal girders ina rising sector gate, this paper proposed a new procedure using the commercial optimization package, PIAnO, as well as Pro-Engineer, Hypermesh, and Abaqus. The optimal positions of the horizontal girders are selected from 9 predefined positions. A special technique was developed and applied to change the discrete position set, such as (1, 4, 8) to a continuousdimensionless variable. For this, a FORTRAN program was written to convert the dimensionless variable to a set of positionnumbers, and vice versa.
Yong-Joon Lee,Yongsung Suh,Jung-Sun Kim,Yun-Hyeong Cho,Kyeong Ho Yun,Yong Hoon Kim,Jae Young Cho,Ae-Young Her,Sungsoo Cho,Dong Woon Jeon,Sang-Yong Yoo,Deok-Kyu Cho,Bum-Kee Hong,Hyuckmoon Kwon,Sung-Jin 대한심장학회 2022 Korean Circulation Journal Vol.52 No.4
Background and Objectives: Identifying patients with high bleeding risk (HBR) is important when making decisions for antiplatelet therapy strategy. This study evaluated the impact of ticagrelor monotherapy after 3-month dual antiplatelet therapy (DAPT) according to HBR in acute coronary syndrome (ACS) patients treated with drug eluting stents (DESs). Methods: In this post-hoc analysis of the TICO trial, HBR was defined by 2 approaches: meeting Academic Research Consortium for HBR (ARC-HBR) criteria or Predicting Bleeding Complications in Patients Undergoing Stent Implantation and Subsequent DAPT (PRECISE-DAPT) score ≥25. The primary outcome was a 3–12 months net adverse clinical event (composite of major bleeding and adverse cardiac and cerebrovascular events). Results: Of the 2,980 patients without adverse events during the first 3 months after DES implantation, 453 (15.2%) were HBR by ARC-HBR criteria and 504 (16.9%) were HBR by PRECISE-DAPT score. The primary outcome rate was higher in HBR versus non-HBR patients (by ARC-HBR criteria: hazard ratio [HR], 2.87; 95% confidence interval [CI], 1.76–4.69; p<0.001; by PRECISE-DAPT score: HR, 3.09; 95% CI, 1.92–4.98; p<0.001). Ticagrelor monotherapy after 3-month DAPT was associated with lower primary outcome rate than ticagrelor-based 12-month DAPT regardless of HBR by ARC-HBR criteria, with similar magnitudes of therapy effect for HBR and non-HBR patients (p-interaction=0.400). Results were consistent by PRECISE-DAPT score (p-interaction=0.178). Conclusions: In ACS patients treated with DESs, ticagrelor monotherapy after 3-month DAPT was associated with lower rate of adverse clinical outcomes regardless of HBR, with similar magnitudes of therapy effect between HBR and non-HBR.