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철근콘크리트 프레임면내 CUT OFF형 조적벽체의 내진성능 평가 및 개선
신종학,하기주,전하석 경일대학교 산업기술연구소 1999 産業技術硏究所 論文集 Vol.6 No.-
In this dissertation four reinforcement concrete rigid frame and masonry infilled wal land cut off type masonry infilled wall wee constructed and tested during vertical and cyclic loads simultaneously. Experimental programs were accomplished to evaluat the structural performance of test specimens, such as the hysteretic behavior, the maximum horizontal strength, crack propagation, and ductility etc. Test variables are hoop reinforcement ratio and measonry infilled wall with on without. All the specimens were modeling in one-third scale size. Based on the test results, the following conclusions can be made. After we consider the maximum horizontal capacity focusing on a rigid frame, in case of the curtain wall masonry infilled wall type(IFB-1∼3), maximum hrizontal capacity increased by 1.45 to 1.68 times. In the case of cut off the section of column masonry infilled wall type(IFBC-1∼3), It increased by 1.73 to 1.98 times. As for the curtain wall masonry infilled wall type(IFB-1∼3), ductility increased by 1.04 to 1.59 times as the various hoop ratio increased. As the cut off the section of the column masonry infilled wall type(IFBC-1∼3), ductility increased by 1.1 to 1.4 times as the various hoop ratio column increased.
Joo, Dong Jin,Yang, Chul Woo,Jeong, Hyeon Joo,Lim, Beom Jin,Huh, Kyu Ha,Chung, Byung Ha,Choi, Yeong Jin,Kang, Shin-Wook,Kim, Yu Seun The Korean Academy of Medical Sciences 2014 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.29 No.8
<P>This study was designed to evaluate whether sirolimus (SRL) conversion effectively improves renal function and histopathology in calcineurin inhibitor (CNI)-treated renal recipients with mild to moderate renal insufficiency. SRL conversion from CNI was performed in patients who underwent kidney transplantation from 6 months to 5 yr prior to screening. Forty-five patients were enrolled. The effect of SRL conversion on graft function was evaluated, and protocol biopsies were performed preconversion and 1 yr after conversion. Overall graft function after SRL conversion gradually improved, and the improvement in renal function was closely associated with the shorter duration of CNI exposure. When we divided the patients by the duration of CNI exposure, the patients with less than 1 yr of CNI exposure demonstrated significant improvement, but patients with a greater than 1 yr CNI exposure did not exhibit significant improvement. In contrast, protocol biopsies demonstrated no significant improvements in the modified 'ah' score or other Banff scores after SRL conversion. Furthermore, the duration of CNI treatment prior to SRL conversion was not associated with histological findings 1 yr after SRL conversion. SRL conversion improved graft function in renal recipients with mild to moderate renal insufficiency, but this effect is not accompanied by histological improvement.</P><P><B>Graphical Abstract</B></P><P/>
Landscape Planning for Shiwha Migratory Birds Habitat
Joo Shin-Ha,Ahn Se-Hyon Korean Institute of Landscape Architecture 2004 Journal of the Korean institute of landscape archi Vol.2 No.-
Shiwha Lake is an excellent example of a body of water restored from a state of heavy pollution to a cleaner and more ecological state. This paper will explore techniques and methods available to landscape planning for the creation of new migratory birds habitats in Shiwha Lake. Because Shiwha lake is located adjacent to a new industrial site on reclaimed land, any planning effort aimed at restoring bird habitats must carefully consider the existing context. This plan had 3 goals; (1) to restore the coastal environment, (2) to create a habitat for migratory birds, and (3) to administer environmental education programs. To achieve these goals, several objectives were determined and planning criteria were proposed for topology, water environment(fresh, brackish and salt water swamps), zoning(for experts and general visitors), circulations, planting and mounding. The flora and fauna of the site was surveyed, and 5 alternatives were suggested and compared in several aspects. Planting species were carefully selected considering target birds and habitat requirements. In order to increase bio-diversity of the site, the plan proposed multi-staired mounds and extensive drainage systems. Bird watching facilities with natural materials, and the remote observing system using CCTV and the internet were some of the ecological techniques recommended by the plan. The bird watching trails are divided into two different zones for experts and general visitors.
반복하중을 받는 철근콘크리트 단차형 내부 보-기둥 접합부의 이력거동 특성
하기주 ( Ha Gee-joo ),신종학 ( Shin Jong-hak ),허민행 ( Huh Mean-haeng ),하재훈 ( Ha Jae-hoon ),이재근 ( Lee Jae-gun ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
In this dissertation, experimental program was carried out to study the hysteretic behavior of the reinforced different floor type interior beam-column joint repeated cyclic loads under seismic actions. The test results was as follow. The reinforced interior beam-column joint, designed by the different floor type, was increased energy dissipation capacity and maximum load carrying capacity according to the increase of different floor in comparison to standard specimen. And it was also dissimilar to failure mode adjacent to joint region, energy dissipation capacity of each specimen, designed by the different floor type, was increased 1.001~1.20 times in comparison to standard specimen.
Han, Shin-Ha,Cho, Kyung-Hae,Lee, Seung-Jeong,Lee, Chong-Kil,Song, Young-Cheon,Ha, Nam-Joo,Kim, Kyung-Jae The Korean Association of Immunobiologists 2005 Immune Network Vol.5 No.3
Background: Dendritic cells (DCs) playa critical role not only in the initiation of immune responses, but also in the induction of immune tolerance. In an effort to regulate immune responses through the modulation of antigen presenting cell (APC) function of DCs, we searched for and characterized APC function modulators from natural products. Methods: DCs were cultured in the presence of propolis components, WP and CP, and then examined for their ability to present exogenous antigen in association with major histocompatibility complexes (MHC). Results: WP and CP inhibited class I MHC-restricted presentation of exogenous antigen (cross-presentation) in a DC cell line, DC2.4 cells, and DCs generated from bone marrow cells with GM-CSF and IL-4. The inhibitory activity of WP and CP appeared to be due not only to inhibition of phagocytic activity of DCs, but also to suppression of expression of MHC molecules on DCs. We also examined the effects of WP and CP on T cells. Interestingly, WP and CP increased IL-2 production from T cells. Conclusion: These results demonstrate that WP and CP inhibit MHC-restricted presentation of exogenous antigen through down-regulation of phagocytic activity and suppression of expression of MHC molecules on DCs.
매입형 탄소섬유봉과 보강철물을 이용한 철근콘크리트 보의 구조성능 평가
하기주(Ha Gee-Joo),신종학(Shin Jong-Hak),하영주(Ha Young-Joo),홍건호(Hong Kun-Ho),강현욱(Kang Hyun-Wook) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
In this study, experimental research was carried out to evaluate the structural performance of reinforced concrete beam using embedded carbon fiber bars and strengthening metal fittings in existing reinforced concrete building Test results showed that retrofitting specimens with embedded carbon fiber bars were increased the load-carrying capacity by 21~55%, retrofitting specimens with embedded carbon fiber bars and strengthening metal fittings were increased the load-carrying capacity by 21~48% in comparison with the standard specimen. Also, retrofitting specimens showed much higher ductility compared to retrofitting specimens with conventional method.