트레드밀 운동시 흡기근 테이핑이 폐활량에 미치는 영향

김민지,신수영,송월섭,조수진,최동락,황미진,황진규,박진현,김경,Dennis W. Fell 대구대학교 특수교육재활과학연구소 2011 再活科學硏究 Vol.29 No.1

이 연구는 트레드밀 운동과 키네시오 테이핑의 효과에 따른 폐활량의 변화를 알아보기 위해 26명의 비흡연자가 참가하였으며 키네시오 테이핑을 적용하지 않은 그룹과 키네시오 테이핑을 적용한 두 그룹으로 무작위로 배정하고 각 군들을 주 3회 6주간의 트레드밀 훈련을 실시하였다. 실험 전과 후, 스파이로미터를 사용하여 키네시오 테이핑의 적용 따른 폐활량 변화 효과를 측정하였다. 이 연구의 결과를 종합해보면 키네시오 테이핑을 적용 그룹에서 적용하지 않은 그룹에 비해 FVC, FEV1에서 유의한 증가를 보였다. 이러한 결과는 건강한 성인에서 키네시오 테이핑을 적용한 경우 키네시오 테이핑을 적용하지 않고 트레드밀 운동을 한 경우보다 폐활량의 향상에 효과적이라고 생각되어진다. The purpose of this study was to investigate the variation of vital capacity(VC) according to the effects of kinesio taping with treadmill exercise. Twenty-six non-smokers were participated in this research and these subjects were randomly assigned into two groups. To measure the VC variation effects of kinesio taping, spirometer was used. The collected data were analyzed statistically by using a paired Mauchly test and repeated measure ANOVA. The results of this study were as follows; A group: treadmill with kinesio taping B group: treadmill without kinesio taping. Between A and B, there were significant differences. In the case of A group, there was 11.66% increase of VC, during 3 weeks experiment(p<.01). In the case of B group, there were significant differences, 3.35% increase of VC, during 3 weeks taping intervention(p<.01). After 6 weeks experiment, the improvement of VC shown a significant difference with intergroup (p<.05). From this result, it was revealed that treadmill exercise with kinesio taping was effective to improve VC to healthy adult than treadmill exercise without kinesio taping.

자외선 코팅 강판의 광택도에 미치는 공정 변수에 대한 연구

황동섭 ( Dong Seop Hwang ),조동철 ( Dong Chul Cho ),유혜진 ( Hye Jin Yoo ),김종상 ( Jong Sang Kim ),정인우 ( In Woo Cheong ) 한국접착및계면학회 2014 접착 및 계면 Vol.15 No.3

자외선 경화법을 이용한 강판의 표면 코팅 시 사용되는 올리고머, 단량체, 광개시제 및 강판의 특성 등 주요 인자가 코팅 표면의 20° 및 60° 광택도(ASTM D523)에 미치는 영향에 대해서 연구하였다. 공정 변수에 대한 광택도의 변화는 60° 광택도에 비해 20° 광택도가 민감하게 변화하였다. 단독으로 올리고머를 사용할 경우의 경우, 광택도의 변화는 거의 없었으나, 올리고머의 혼합 비율이, 단량체의 종류와 혼합 비율, 올리고머와 단량체의 혼합 비율, 개시제의 종류와 함량 비, 강판의 종류는 광택도에 큰 영향을 주었다. 올리고머 혼합의 경우 폴리우레탄 아크릴레이트(UA)와 에폭시 아크릴레이트(EA)의 혼합 비율이 70 : 30, 단량체의 경우 트리메틸올프로판트리아크릴레이트(TMPTA)와 테트라히드로퍼퍼릴아크릴레이트(THFA)가 5 : 5의 비율로 혼합된 경우가, 혼합 올리고머(UA : EA =70 : 30)의 함량이 90 wt%인 경우 최대의 광택도를 나타내었다. 광개시제 중 액체 타입인 Darocur MBF가 고체 타입인 Irgacure 184에 비해 우수한 광택도를 나타내었으며, 최소 투입량인 1 wt%의 농도에서 높은 광택도를 나타내었다. 기질의 경우, EG강판이나 primer가 처리된 강판에 비해 GI강판이 더 좋은 광택도를 보여주었다. 상기 공정 변수에 대한 연구를 통해 광택도 향상을 위해 사용되는 첨가제 없이도 20° 광택도 95 GU의 최대값을 60° 광택도는 120 GU의 광택도를 얻을 수 있었다. This work deals with the effects of different oligomers, monomers, photoinitiators, and steel plates on the variation of gloss for UV coated steel plates at 20° and 60° (ASTM D523). The gloss value was more significantly varied with 20° angle as compared with 60°. No substantial change in gloss was observed for the type of single oligomer; however, the gloss varied with the mixing ratios of oligomers, type and mixing ratio of monomers, type and concentration of photoinitiator, and type of steel plate. The maximum gloss value was observed when the mixing ratio of polyurethane acrylate (UA) to epoxy acrylate (EA) was 70 : 30, the mixing ratio of trimethylolpropantriacrylate (TMPTA) to tetrahydrofurfurylacrylate (THFA) was 5 : 5, the content of the mixed oligomer (UA : EA = 70 : 30) was 90 wt%, respectively. Darocur MBF of liquid type showed better gloss property than the solid type of Irgacure 184, and the gloss was decreased as the concentration of Darocur MBF increased from 1 to 4 wt%. Regarding the type of steel plate, GI steel plate showed better gloss property as compared with EG and primer-coated steel plates. The maximum gloss values of 95 GU and 120 GU, respectively, at 20° and 60° angles throughout the parametric study in the absence of leveling agents enhancing the gloss.

Knockdown of sestrin2 increases pro-inflammatory reactions and ER stress in the endothelium via an AMPK dependent mechanism

Hwang, Hwan-Jin,Jung, Tae Woo,Choi, Ju-Hee,Lee, Hyun Jung,Chung, Hye Soo,Seo, Ji A,Kim, Sin Gon,Kim, Nan Hee,Choi, Kyung Mook,Choi, Dong Seop,Baik, Sei Hyun,Yoo, Hye Jin Elsevier/North Holland [etc.] 2017 Biochimica et biophysica acta Vol.1863 No.6

<P><B>Abstract</B></P> <P><B>Background & Objective</B></P> <P>Sestrin2 (sesn2) has recently gained attention as an important regulator for various metabolic disorders. Sesn2 is involved in AMP-activated protein kinase (AMPK) activation, which leads to anti-inflammatory and anti-oxidative responses. However, the role of sesn2 in the endothelium has not yet been clarified.</P> <P><B>Methods</B></P> <P>To evaluate sesn2-mediated anti-atherosclerotic effects, siRNA to silence sesn2 expression was introduced to human umbilical vein endothelial cells (HUVECs), THP-1 cells and C57BL/6 mice. Lipopolysaccharide (LPS) was administrated to sesn2-knockdown cells and mice to induce atherosclerotic signals.</P> <P><B>Results</B></P> <P>Knockdown of sesn2 was involved with atherosclerotic reactions caused by LPS treatment through decrease of AMPK phosphorylation. In sesn2-knockdown HUVECs and THP-1 cells, LPS-mediated nuclear factor kappa B (NF-κB) phosphorylation and secretion of pro-inflammatory cytokines were both significantly increased. In HUVECs, expression of adhesion molecules and LPS-stimulated adhesion of THP-1 cells to the endothelium were significantly increased after sesn2-knockdown. Furthermore, LPS-induced reactive oxygen species (ROS) production, endoplasmic reticulum (ER) stress, and cell toxicity were all significantly elevated after sesn2-knockdown in HUVECs. Interestingly, all these pro-atherosclerotic effects were fully abrogated by treatment with an AMPK activator. In aortic tissue samples from C57BL/6 mice, sesn2-knockdown using siRNA oligomers resulted in reduced AMPK phosphorylation and induction of LPS-mediated NF-κB phosphorylation, leading to up-regulation of adhesion molecules and ER stress-related signaling.</P> <P><B>Conclusion</B></P> <P>Knockdown of sesn2 aggravates atherosclerotic processes by increasing pro-inflammatory reactions and ER stress in the endothelium via an AMPK-dependent mechanism, suggesting that sesn2 might be a novel therapeutic target for atherosclerosis.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Sesn2-knockdown significantly decreases AMPK phosphorylation in the endothelium. </LI> <LI> Sesn2-knockdown increases LPS-mediated inflammatory signaling and NF-κB phosphorylation. </LI> <LI> Sesn2-knockdown aggravates LPS-induced expression of adhesion molecules and inflammatory cytokines. </LI> <LI> Sesn2-knockdown increases LPS-induced ER stress, ROS production and cell death in endothelium. </LI> <LI> All these atherosclerotic effects induced by Sesn2-knockdown were significantly attenuated by an AMPK activator. </LI> </UL> </P>

2D Grid Map Building Using ICP Algorithm and Line Extraction

Dong-Ju Lee,Yeol-Min Yun,Yo-Seop Hwang,Jang-Myung Lee 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10

This paper suggests using the ICP(Iterative Closet Point) algorithm to create a 2D map and using line extraction to calibrate line error. The data used in two-dimensional map is only obtained by sensor of mobile robot. The robot can build a 2D map by using data currently through value of encoder, but this method is difficult to calibrate because of difference of distance from value of sensor. Through this, it is occurred wrapping and distortion of map. In order to calibrate position error about this part, distance is calibrated by ICP algorithm and line extraction.

Safety of Train Passengers in a Tunnel

Dong-Jin Kim,Dae-Seop Moon,Seong-Am Moon,Young-Ha Hwang 한국철도학회 2007 한국철도학회논문집 Vol.10 No.1

기후변화와 국제관광수요의 관계에 관한 연구 - 극한기후를 중심으로 -

황윤섭 ( Hwang Yun-seop ),김동환 ( Kim Dong-hwan ),유천 ( Yu Cheon ) 국제지역학회 2017 국제지역연구 Vol.21 No.3

기후는 관광지의 자원이자 관광객 경험에 영향을 미치는 요소로 이의 변화를 추정하는 것은 관광산업의 지속가능한 발전을 위한 시사점을 줄 수 있다. 본 연구는 극한기후의 변화가 관광수요에 미치는 영향을 규명하기 위한 것으로 2005년 1월부터 2016년 12월까지의 월별자료를 이용하여 실증분석을 실시하였다. 사용된 극한기후지표는 집중호우한계점, 최대건조 지속기간, 월최저기온, 월최고기온이며 자기상관과 이분산성을 고려하여 패널 GLS 분석을 실시하였다. 분석결과 극한기후변화는 관광수요에 영향을 미치는 것으로 나타났다. 특히 계절별로 영향변수, 방향성, 영향정도가 각각 차이를 보였다. 이러한 결과는 기후변화에 따른 관광수요의 영향을 보다 효율적으로 추정하기 위해서는 극한기후변화가 고려되어져야 하며, 이때 계절에 따른 추정이 필요함을 시사한다. Climate is a source of tourism and a factor influencing tourist experience. Therefore estimating the changes can give some implications for the sustainable development of the tourism industry. The purpose of this study is to investigate the impact of extreme weather changes on tourism demand. For this, empirical analysis was conducted using monthly data from January 2005 to December 2016. The extreme climate indicators used were panel rainfall threshold, maximum dry duration, monthly minimum temperature, monthly maximum temperature, and panel GLS analysis with autocorrelation and heterogeneity.

지상연소시험장 안전 구조물의 방호성능 평가 연구

김동희(Dong-Hee Kim),황경섭(Gyeong-seop Hwang),최재성(Jae-sung Choi),조시현(Si-Hyeon Jo),정민철(Min-Cheol Jung),이정호(Jeong-Ho Lee) 한국추진공학회 2022 한국추진공학회 학술대회논문집 Vol.2022 No.5

IPO기업의 소유구조와 기업가치

황동섭,Hwang, Dong-Seop 한국재무관리학회 2001 財務管理論叢 Vol.7 No.1

일반적으로 기업공개는 소유구조를 분산시키며, 소유구조의 분산은 경영자의 유인에 변화를 가져와 기업가치에 영향을 미칠 수 있다고 한다. 본 논문에서는 기업 공개후 IPO 기업의 가치가 상장전년도와 비교해서 하락하는지를 검증해보고, 가치의 하락이 소유구조의 분산과 관련이 있는지를 검증해보고자 한다. 검증 결과 공개후 기업의 소유구조가 분산되었으며, 가치가 유의적으로 하락했음을 확인할 수 있었다. 그러나 이러한 기업가치의 하락이 소유구조의 분산과는 별다른 관련이 없음을 확인할 수 있었다.

Environmental Regulation Effects Revisited: Channel Effects on Industrial Economic Performance

( Yun Seop Hwang ),( Xiaoxu Dong ),( Wonwoong Choi ) 한국생산성학회 2016 生産性論集 Vol.30 No.2

This paper theoretically reviews the researches about the effects of environmental regulations on economic performances. According to the previous researches, we propose that environmental regulations affect industrial economic performances through three channels: export, foreign direct investment, and innovative activities. We collected the related data over the period of 1997-2009 from 14 industries in Korea. The emission amounts of the eight kinds of pollutants were used to calculate the pollutant index as the measure of stringency of environmental regulations. We used the simultaneous equations model and the 3SLS method to solve the endogenous problems between the variables. The results indicated that environmental regulations negatively affect industrial economic performances through export channels. Environmental regulations have insignificant effects on inflow FDI. Although environmental regulations motivate companies to increase R&D investments, it does not influence industrial economic performances through R&D investments. In the future, Korean government should implement various policies of environmental regulations, reinforce economic policies and soft policies to enhance efficiency and flexibility.

《素問·熱論》六經分證과 《傷寒論》 六經辨證의 相關性에 對한 硏究

이동휘(Dong Hwi Lee),황민섭(Min Seop Hwang),윤종화(Jong Hwa Yoon) 대한의료기공학회 2004 醫療氣功 Vol.7 No.2