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Statin 치료시 LDL 콜레스테롤의 직접 측정값과 계산값의 비교
김현진 ( Hyeon Jin Kim ),석지혜 ( Ji Hye Suk ),강지현 ( Ji Hyun Kang ),권혁용 ( Hyuk Yong Kwon ),황치성 ( Chi Sung Hwang ),김명준 ( Myoung Joon Kim ),김미경 ( Mi Kyung Kim ),김태익 ( Tae Ik Kim ),김인주 ( In Joo Kim ) 대한내과학회 2010 대한내과학회지 Vol.79 No.3
Background/Aims: Lowering low-density lipoprotein cholesterol (LDL-C) is the primary target for the prevention of cardiovascular disease. Previous studies have shown that estimated LDL-C levels calculated using Friedewald`s formula (FLDL-C) are closely correlated with directly measured LDL-C levels (DLDL-C). However, because statins not only reduce LDL-C, but also alter the levels of parameters used to calculate FLDL-C (i.e., total cholesterol, triglycerides, and high-density lipoprotein cholesterol), whether calculated LDL-C levels remain a reliable estimate of actual levels after statin treatment is unclear. Methods: Subjects included 985 patients at high risk of cardiovascular disease who had taken statins for more than 6 months. FLDL-C data were compared to DLDL-C data. Results: A strong correlation was observed between DLDL-C and FLDL-C data (R2=0.879). However, the absolute values for FLDL-C and DLDL-C differed significantly according to a paired t-test, and 42.3% of patients showed a difference of greater than 10% between these two values. Among patients with diabetes, the percentage of patients deemed to have achieved target LDL-C levels differed significantly according to the method of LDL-C determination (p=0.007). Conclusions: FLDL-C and DLDL-C data remained well correlated after statin treatment, although the absolute values differed significantly according to the LDL-C determination method. Furthermore, the percentage of subjects deemed to achieve target LDL-C levels differed significantly according to the method of determination among patients with diabetes. (Korean J Med 79:277-284, 2010)
옥외 장기폭로에 따른 UHPC 패널의 표면 특성 평가 연구
김태익 ( Kim Tae-ik ),최병걸 ( Choi Byung-keol ),박용규 ( Park Yong-kyu ),최상훈 ( Choi Sang-hoon ),윤기원 ( Yoon Gi-won ),이대식 ( Lee Dae-seek ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.1
In this study, surface performance evaluation was conducted according to the fiber and surface finishing technique of the exterior material using Ultra High Performance Concrete(UHPC), whitch is spotlighted as a highly durable exterior material. As a result of outdoor exposure, the initial performance of the UHPC Panel using organic fibers was maintained without being affected by the surface finishing technique. In the specimen using steel fiber, the surface performance was maintained when the water repellent treatment was performed in the plain specimen, but fiber corrosion occurred in the specimen to which the surface finishing technique was applied.
3D 프린터를 활용한 UHPC 3D 입체패널 제작에 관한 기초적 연구
김태익 ( Kim¸ Tae-ik ),윤주용 ( Yoon¸ Ju-yong ),최병걸 ( Choi¸ Byung-keol ),박용규 ( Park¸ Yong-kyu ),이대식 ( Lee¸ Dae Seek ),윤기원 ( Yoon¸ Gi-won ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2
Appearance finish is important for amorphous buildings to maximize amorphousness, and GFRC, glass, and metal are mostly used as exterior materials for amorphous buildings currently applied. However, the existing exterior materials showed limitations in amorphous expression, texture, and color expression. In this study, a 3D stereoscopic panel mold was manufactured using the FDM method, one of the 3D printing technologies, and 3D stereoscopic panel production was reviewed using Ultra High Performance Concrete (UHPC), which has excellent physical and mechanical performance and expression. In order to overcome the limitations of unstructured expression, a UHPC 3D stereoscopic panel using the FDM method, one of the 3D printing technologies, was manufactured. Unlike steel molds, FRP molds, and EPS molds, the FDM method can be applied to various materials, and complex shapes are implemented. If it is used using recyclable materials as well as PLA filaments used in the FDM method, it will overcome the limitations of amorphous expression and activate the production of 3D stereoscopic panels that have secured eco-friendliness.
UHPC 외장패널을 활용한 비정형건축물 외장패널의 목업 시공사례에 대한 연구 - 부산 오페라 하우스 신축 공사 -
김태익 ( Kim Tae-ik ),윤주용 ( Yoon Ju-yong ),최병걸 ( Choi Byung-keol ),박용규 ( Park Yong-kyu ),윤기원 ( Yoon Gi-won ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.1
In the case of the Busan North Port, where the Busan Opera House is located, it is an environment exposed to various external deterioration factors such as frequent strong winds, seawater and salty winds, and an exterior material using UHPC (Ultra High Performance Concrete), a highly durable exterior material as a solution to this. Has been adopted. in this study, an economical production and construction direction was reviewed by applying UHPC to the exterior panels of atypical buildings that cannot cope with GFRC, metal, and glass, which are the main exterior finishing materials applied so far. When steel fibers are used, structural performance may be better than organic fibers, but due to environmental factors in Busan, corrosion due to exposure to steel fibers or problems with safety management after construction and completion may occur. Therefore, the site used the newly developed SACF fiber. Facade design of atypical buildings, which will increase in the future, is an important part, and the scope of use of UHPC panels is expected to increase in the future as design trends and demand for high durability increase.