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- 저자 : 김병일(Kim, Byoung-Il) (검색결과 642 건)
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김병일,김혁,손상태,정태열,정원상,김영학,강정호,지행옥,Kim, Byung-Il,Kim, Hyuk,Sohn, Sang-Tae,Jeong, Tae-Yeol,Chung, Won-Sang,Kim, Young-Hak,Kang, Jeong-Ho,Jee, Heng-Ok 대한흉부심장혈관외과학회 1999 Journal of Chest Surgery Vol.32 No.3
The complications associated with the use of pulmonary artery catheter include dysrhythmias, heart block, pulmonary artery rupture, pulmonary infarction, endocardial damage, balloon rupture, arterial puncture, thromboembolism, air embolism, infection, pneumothorax, and knotting of the catheter. Knotting of the catheter is a rare complication and it should be anticipated if there is an excessive advancement of the pulmonary artery catheter beyond the normally expected distance. We report a successful surgical removal of knotted pulmonary artery catheter by sternotomy and cardiopulmonary bypass.
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김병일,김창윤,김두연,Kim, Byungil,Kim, Changyoon,Kim, Du Yon 대한토목학회 2015 대한토목학회논문집 Vol.35 No.5
The purpose of this study is to reveal the effects of the number of users and their spatial distribution on the evacuation time in a road tunnel in the event of a fire. An agent-based evacuation model was implemented using Netlogo following the ODD protocol. The proposed model illustrates how the evacuation behavior of one can hinder others across different evacuation environments. Simulations show that evacuation time increases with the number of users when they are randomly located in a road tunnel.
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김병일,손상태,신성호,정원상,김혁,김영학,강정호,지행옥,이철범,서정국,Kim, Byung-Il,Sohn, Sang-Tae,Shin, Sung-Ho,Chung, Won-Sang,Kim, Hyuk,Kim, Young-Hak,Kang, Jung-Ho,Jee, Heng-Ok,Lee, Chul-Burm,Seo, Jung-Kuk 대한흉부심장혈관외과학회 1999 Journal of Chest Surgery Vol.32 No.1
Background: The transplantation of organs between phylogenetically disparate or harmonious species has invariably failed due to the occurrence of hyperacute rejection or accerelated acute rejection. But, concordant cardiac xenograft offer us an opportunity to study xenotransplantation in the absence of hyperacute rejection. Current therapeutics for the prolongation of survival of rodent concordant xenotransplantation are not ideal with many regimens having a high mortality rate. Cyclosporine A & Mycophenolate Mofetil are new immunosuppresive agent which has been shown to be effective at prolonging survival of allograft, as purine synthesis inhibitor. Material and Method: We used white mongrel rats as recipient and mice as donor, divided 4 groups(n=6), control group(Group 1) has no medication or pretreatment, Group 2 has splenectomy as pretreatment 7∼10 days before transplantation, Group 3 has Cyclosporine A treatment group, Group 4 has combined treatment of Cyclosporine A & Mycophenolate Mofetil(RS 61443). We compared survival time. Reuslt: We can't find significant difference of survival time between each groups. Conclusion: We concluded that rejection of cardiac xenograft was different from rejection of allograft, and new immunossuppresive Agent(Mycophenolate Mofetil, Cyclosporine A) was not effective for prolongation of survival time after cardiac xenograft.
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김병일,이세현,Kim, Byoung-Il,Lee, Sea-Hyun 한국자원리싸이클링학회 2015 자원리싸이클링 Vol.24 No.3
The flexural performance of amorphous steel fibers having environmental and economy benefits due to relatively short manufacturing process were evaluated as well as that of hooked steel fibers by varing fiber length and volume fraction. Fiber lengths were 10 mm, 20 mm, 30 mm and fiber volume fractions were varied from 0.3% to 1.2%. Test results with flexural performance showed that mixing design needs to be careful because of relatively high volume of amorphous steel fiber compared to hooked steel fibers. High flexural strength was obtained from both longer fiber length and higher volume fraction. Residual strength and toughness of amorphous steel fiber were similar to that of hooked steel fiber, even though rapid dropping of applied load right after concrete matrix breaking. It can be judged that relatively high ability of energy dissipation around first cracking area relatively overcome rapid dropping of loading.
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행위자 기반 모델링을 활용한 시간에 따른 침수 지역 예상
김병일,신사철,정재훈,Kim, Byungil,Shin, Sha Chul,Jung, Jaehoon 한국건설관리학회 2016 한국건설관리학회 논문집 Vol.17 No.4
Emergency and evacuation planning is critical to reduce potential loss of life from flooding. In order to develop evacuation plans, emergency managers and decision makers require estimates of probable inundation areas and times of inundation. In this paper, we present an agent-based modeling approach that incorporates in a hydrodynamic model to estimate both of these properties. A case study is conducted modeling the failure of a dam located in Andong, South Korea. We estimate flood travel times for Manning's roughness coefficients and discharge using a coupling of the continuity equation and Manning's equation. Using the output from the hydrodynamic model and the flood travel times, the agent-based model produces flood inundation maps at each time interval. The model estimates that for two-thirds of the Andong region the time of inundation is estimated to be slightly less than three minutes. The results of this study can be used to in the development of emergency and evacuation planning for the region.
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고온에서 미세입자를 가진 석출경화형 Al-0.55wt% Zr 합금의 Thershold 응력과 전위/입자의 상호 작용에 관한 연구)
김병일,중도영치 ( Byubg I Kim,Hideharu Nakashima ) 한국열처리공학회 1992 열처리공학회지 Vol.5 No.4
An experimental study of the constitutive response of precipitation-strengthened Al-0.55wt% Zr alloy, which consists of an Al matrix precipitation-strengthened by coherent particles, β`(Al₃Zr) with Ll₂ structure has been performed. The deformation response of the materials has been examined by stress relaxation test at 573K, 623K and 673K. It was found that there exist the threshold stress during stress relaxation and threshold stress results from the presense of β`(Al₃Zr) particles. The ratio of threshlod stress and Orowan stress decreased gradually with increasing temperature. The resistance to climb-pass of particles was independent of particles size for a fixed volume fraction although the threshold for bowing and particles cutting are sensitive to the particles dimensions. The smaller particles cutted by dislocations. This behavior of dislocations in this alloy was explained in terms of the small value antiphase boundary energy. The dislocation networks wrere more extensive in spesimens subjected to stress relaxation and there were numerous areas that have a high denstiy of jogged dislocation. This experiment results indicate that the rate controlling stress relaxation process is the climb of edge disloaction over particles.
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심층혼합처리공법(DCM)의 설계, 시공 및 품질관리 사례 연구
김병일,박언상,한상재,Kim, Byung-Il,Park, Eon-Sang,Han, Sang-Jae 한국지반신소재학회 2021 한국지반신소재학회 논문집 Vol.20 No.4
In this study, evaluation and consideration of domestic/overseas design, construction, and quality control performed by the authors on the deep cement mixing method were performed, and improvements for the development of the DCM method were suggested in the future. As a result of this study, it was found that the cross-sectional area correction for strength is required during the laboratory test of mix proportion, and caution is required because the extrapolation method may lead to different results from the actual one. Applicable design methods should be selected in consideration of both the improvement ratio and the type of improvement during design, and it was confirmed that the allowable compressive strength to which the safety factor was applied refers to the standard value for stability review and not the design parameters. In the case of the stress concentration ratio, rather than applying a conventional value, it was possible to perform economical design by calculating the experimental and theoretical stress concentration ratio reflecting the design conditions. In the case where pre-boring is expected during construction, if the increased water content is not large compared to the original, there were cases where a major problem did not occur even if the result that did not consider the increase in water content was used. In addition, it was confirmed that when the ratio of the top treatment length to the improved length is high, a small amount of design cement contents per unit length can be injected during construction. In the case of quality control, it was evaluated that D/4~2D/4 for single-axis and D/4 point for multi-axis were optimal for coring of grouting mixtures. As an item for quality control, it is judged that the standard that considers the TCR along with the unconfined compressive strength of grouting mixtures is more suitable for the domestic situation.
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