[신진연구자 소개] 김호영 Ho-Young Kim

김호영(Ho-Young Kim) 한국콘크리트학회 2019 콘크리트학회지 Vol.31 No.6

백내장 수술 후 후낭혼탁 발생 억제에 대한 트라닐라스트의 유용성

김호영,이헌일,전연숙,김재찬,Ho Young Kim,Hyeon Il Lee,Yeoun Sook Chun,Jae Chan Kim 대한안과학회 2008 대한안과학회지 Vol.49 No.12

Purpose: To evaluate the inhibitory effect of tranilast on the formation of posterior capsular opacity (PCO) after a cataract operation ex vivo and in a rabbit model. Methods: A human lens epithelial cell line (B3) was treated with 0.005-0.1 mM tranilast. Cytotoxicity assessment and effective dosage determination of tranilast were performed using MTT assays. B3 cell lines were cultured in Eagle's minimal essential medium (EMEM) containing 20% FBS with different concentrationsof tranilast, and morphological differences were observed. To investigate the effect of tranilast on cytokine production in B3 cell lines, cells were treated with 0.01 mM tranilast and expression profiles of cytokines were analyzed by RT-PCR. After performing phacoemulsification and intraocular lens implantation in 10 white rabbits, 0.5% tranilast eye drops were given 4 times per day, and the severity of PCO was evaluated bi-weekly using POCOman for 8 weeks after the operation. Results: Cell death was observed in the 0.05 mM tranilast-treated B3 cell lines, and inhibition of epithelial- mesenchymal transition (EMT) was also observed in the 0.01 mM tranilast-treated B3 cell lines. TGF-β1/2, IL-18, and CDK7 mRNA expression decreased in the 0.01 mM tranilast-treated B3 cell lines. Significant suppression of PCO formation was observed in rabbits treated with 0.5% tranilast eye drops 5 weeks post operative (p<0.05). Conclusions: The results from this study show that tranilast suppresses EMT through inhibition of TGF-β, IL-18,and CDK7 expression. The results suggest that tranilast can be used toprevent PCO formation after cataract surgery.

열 기포에 의한 고체 박막의 변형 해석

김호영,이윤표,Kim, Ho-Young,Lee, Yoon-Pyo 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.2

Thermal bubbles find their diverse application areas in the MEMS (MicroElectroMechanial Systems) technology, including bubble jet printers, microactuators, micropumps, etc.. Especially, microactuators and micropumps, which use a microbubble growing by a controlled heat input, frequently involve mechanical and thermal interaction of the bubble with a solid structure, such as a cantilever beam and a membrane. Although the concept is experimentally verified that an internal pressure of the bubble can build up high enough to deflect a thin solid plate or a beam, the physics of the entire process have not yet been thoroughly explored. This work reports the experimental study of the growth of a thermal bubble while deflecting a thin cantilever beam. A physical model is presented to predict the elastic response of the cantilever beam based on the experimental measurements. The scaling law constructed through this work can provide a design guide for micro- and nano-systems that employ a thermal bubble for their actuation/pumping mechanism.

20d_b 정착길이를 가지는 SD700 갈고리철근과 확대머리철근의 정착성능 실험

김호영,심혜정,Kim, Ho Young,Sim, Hye Jung 인천대학교 도시과학연구원 2018 도시과학 Vol.7 No.2

With the increase of the skyscraper center, the development of large-diameter and high-strength reinforcing bars is being carried out to solve the dense reinforcement. In case of the steel reinforced concrete with a small cross section such as beam-column joints, the development length becomes short when straight bars are used. Therefore, it is possible to solve the problem that the development length becomes short by using the bearing strength of the hooked bar and headed bar. In this study, the exterior beam-column joint test of SD700 hooked bar and headed bar with anchorage length of 20db was conducted to extend the development length limitation of hooked bar and headed bar. As a result of the evaluation of the anchorage strength using the design equation by KCI, the average of the [measured value]/[predicted value] ratio was 1.31 for the hooked reinforcing bars. In the case of headed bars, the average of the [measured value]/[predicted value] ratio was 1.12. In addition, in order to compare the anchorage performance of the hooked bar and the headed bar, the measured values were divided by the square root of the compressive strength of the concrete to compare the anchorage strength. Under the same conditions, the anchorage strength of headed bars was 8.5% higher than the hooked bars.

물 위에 뜬 소금쟁이 다리의 탄성 변형

박건중(Kun Joong Park),이덕규(Duck-Gyu Lee),김호영(Ho-Young Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5

Water strider legs, capable of enduring much heavier load than their body weight, are flexible. As a model for the legs, we study how floating flexible sheets in static equilibrium are deformed by hydrostatic pressure and surface tension using the linear theory of elasticity and the Young-Laplace equation. We also consider the maximum load supported by the sheets. The predictions agree well with experimental measurements.

인천지역 석유류 에너지 소비 분석에 관한 연구

김호영(Kim Ho-Young),이상원(Lee Sang-Won) 인하대학교 산업경제연구소 2011 경상논집 Vol.25 No.2

지금까지 우리나라가 중앙정부주도하에 공급중심의 에너지 수요관리를 해왔다. 그러나 제한적인 에너지의 효율적인 에너지수요관리를 위해서는 지역단위의 수요관리가 필요하다. 그래서 본 논문은 지역단위의 수요관리를 위해 인천지역의 석유류소비를 분석하였다. 석유를 소비량의 결정요인을 분석하기 위해 사회경제지표인 에너지가격, GRDP, 자동차대수, 인구수, 전력사용량 5개 변수를 이용하여 분석하였다. 분석결과 GRDP, 인구수, 전력사용량이 늘어날수록 석유를 소비가 증가 하는 것으로 나타났고, 에너지 가격과 자동차대수가 증가하면 석유를 소비는 감소하는 것으로 분석되었다. 자동차대수 증가에 대한 석유류소비 감소는 단순회귀분석결과 석유류소비의 특수성의 원인으로 분석되었다. So far, the energy demand managementof S. Korea has been controlled by the central government mainly dealing with supply. For the better efficiency and limitation of energy demand management, however, regional management systems are clearly needed. Therefore, the local demand for petroleum consumption in Incheon area was analyzed in the study for regional energy management. In order to analyze the determinants of petroleum consumption, five social economy indicators, such as energy prices, GRDP, the number of cars, and the amount of electricity consumption were analyzed. As the result of this analysis, we could find that the more GRDP, population, and the amount of electricity consumption increased, the more petroleum was appeared to be consumed. But the increase in energy prices, and the number of cars was analyzed to lead the decrease in the amount of petroleum consumption. By means of simple regression analysis, the reduction of petroleum consumption by the increased number of cars was analyzed to the reason of the distinctiveness of petroleum consumption.

들뢰즈의 영화기호론

김호영 ( Ho Young Kim ) 한국기호학회 2012 기호학연구 Vol.32 No.-

Cette etude a pour but d`examiner la semiotique du film d`apres Gilles Deleuze. Pour mieux comprendre les theories du signe et de l`image filmique chez Deleuze, nous avons examine en praticulier sur les rapports entre le signe et l`image-mouvement absolue, entre le signe et l`image-mouvement relative, entre le signe et l`image-temps. D`abord, selon Deleuze, l`image-mouvement absolue est une matiere non- langagiere, une masse plastique ou une matiere a-signifiante et a-syntaxique, qui n`est pas une enonciation"ni des enonces, mais un enoncable. Mais d`autre part, elle constitue une matiere signaletique, en ce sens qu`elle comporte des traits de modulation de toute sorte, sensoriels, kinesiques, intensifs, affectifs, rythmiques, tonaux etc. Ensuites, l`image-mouvement relative peut devenir une matiere semiotique, bien qu`elle soit non linguistiquement formee. Les six especes de l`image- mouvement font de cette matiere non-langagiere ou matiere signaletique une matiere semiotique. Et les signes eux-memes sont les traits d`expression qui composent ces images, les combinent et ne cessent de les recreer, portes ou charries par la matiere en mouvement. Enfin, il nous faut remarquer sur l`apparition des situations purement optiques et des images purement optiques et sonores, afin de comprendre les relations entre le signe et l`image-temps. Les situations purement optiques pures nous font decouvrir des liaisons d`un nouveau type, qui ne sont plus sensori-motrices, et qui mettent les sens affranchis dans un rapport direct avec le temps, avec la pensees. Tel est la e fonction des signes de temps, opsignes et songsignes selon les termes de Deleuze : rendre sensibles le temps, la pensee, les rendre visibles et sonores.

수요유도형 모형 기반 산업연관분석을 적용한 정유 부문의 경제적 파급효과 분석

김호영(Ho-Young Kim),송태호(Tae-Ho Song),유승훈(Seung-Hoon Yoo) 한국에너지학회 2015 에너지공학 Vol.24 No.1

다각형 면에서 이차 근사를 통한 다면체 유한요소의 개발

김호영(Ho-Young Kim),김현규(Hyun-Gyu Kim) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.4

태양광 발전 연계 시 V2G를 활용한 전력품질 향상에 관한 연구

김호영(Ho-Young Kim),김지수(Ji-Soo Kim),신광수(Gwang-Su Shin),김철환(Chul-Hwan Kim) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.4

The penetration of renewable energy is increasing to cope with climate change, but there is a possibility that voltage quality may deteriorate due to Photo-Voltaic(PV) which has intermittent output. Recently, development of bi-directional charging/discharging technology allows electric vehicles to transmit their storage power to the grid, which is called Vehicle-to-Grid(V2G) technology. V2G can mitigate voltage quality degradation due to PV by balancing difference between PV generation and load of peak time. In this paper, the voltage quality degradation caused by the output of PV generation is identified in the IEEE 13 bus test system and improved by using V2G technology.