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남진원 ( Nam¸ Jin Won ) 한국구조물진단유지관리공학회 2020 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.24 No.2
아치 교량 등의 행어 부재는 풍하중에 의해 진동이 발생하고 이로 인해 안전성에 영향을 미칠 수 있다. 특히, 비틀림 등으로 인해 행어에 설치된 진동 방지재가 탈락하는 경우도 발생한다. 본 연구에서는 진동방지재가 설치된 행어의 진동 특성을 파악하기 위하여 가속도계를 이용하여 고유진동수 및 진동 모드를 파악하고 이를 바탕으로 진동방지재의 기능을 검증하였다. H형강으로 제작된 행어에 대해 플랜지 부분에 대칭으로 가속도계를 설치하여 휨모드와 비틀림 모드의 진동 특성을 구분하였다. 계측된 가속도 데이터를 바탕으로 산정한 부재의 고유진동수는 내풍에 대한 목표 비틀림 진동수와 비교하여 안정성을 확인하였다.
차량탑재형 GPR을 이용한 교면포장 및 바닥판 상태평가
서진원 ( Suh¸ Jin-won ),이지영 ( Rhee¸ Ji-young ),옥창권 ( Ock¸ Chang-kwon ) 한국구조물진단유지관리공학회 2003 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.7 No.2
Concrete bridge decks, as well as asphalt pavement, are directly exposed to traffic loads and environmental conditions like rain water and deiceing chemicals causing the deteriorations and corrosion of top rebar. It difficult to detect the deterioration process by visual inspection because asphalt pavement show no sign until cavities are formed after deck deterioration. In this study, the Ground Penetrating Radar(GPR) mounted a van was tested to evaluate the condition of concrete decks as well as asphalt pavement. Test results obtained by GPR were compared with damage by the visual survey and material property of asphalt overlay. The ground penetrating radar data shows promise for producing rapid and accurate condition assessment for bridge decks.
서진원 ( Suh¸ Jin-won ),김용전 ( Kim¸ Tong-jeon ),이지영 ( Rhee¸ Ji-young ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.2
Generally, expansion joint is failed more frequently than other components during service life of the bridge. Retrofits and rehabilitations of expansion joints cause not only high maintenance cost but also intrusion to traffic. Therefore, the application of expansion joint with more superior durability, serviceability and maintenance convenience is required. For this purpose, data on failure of expansion joint installed on highway bridges from 1991 to 2000 was analysed. And visual inspection was performed.
[PB-0062] Isolation of soybean ARGONAUTE protein involved in seed coat color pigmentation
Jinwon Lee(Jinwon Lee),Gyu Tae Park(Gyu Tae Park),Hyun Jo(Hyun Jo),Jeongyun Ko(Jeongyun Ko),Junbeom Park(Junbeom Park),Jeong-Dong Lee(Jeong-Dong Lee),Jong Tae Song(Jong Tae Song) 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-
JinWon Noh,HeeSoon Juon,Sanghoon Lee,YoungDae Kwon 대한신경정신의학회 2014 PSYCHIATRY INVESTIGATION Vol.11 No.3
Objective-The purpose of this study is to examine the relationship between substance use and depressive symptoms in a cohort of Koreans aged 45 years and older from a large, population-based study. Using the 2006 Korean Longitudinal Study of Aging, we estimated the prevalence of depressive symptoms and its association with smoking and alcohol use. Methods-Depressive symptoms were measured using the CES-D 10-item scale. Age, marital status, educational attainment, employment and any disability were the control variables. Because there were gender differences in smoking and alcohol use, we also performed a separate analysis by gender. Results-In the multivariable logistic regression, ex-drinkers were more likely to be depressed than non-drinkers (OR, 1.37; 95% CI, 1.08–1.74 for males; OR, 1.78; 95% CI, 1.23–2.57 for females). Compared to non-drinkers, males with moderate drinking habits (OR, 0.75; 95% CI, 0.63–0.90) were less likely to be depressed, whereas heavy male drinkers were more likely to be depressed (OR, 1.43; 95% CI, 1.07–1.91). Female smokers were more likely to be depressed than female non-smokers (OR, 2.07; 95% CI, 1.51–2.83). Conclusion-This study showed atypical pattern of relationship between smoking and depression and U-shaped relationship between depressive symptoms and alcohol consumption in male population. Both of these findings could be inferred from that these regional characteristics might be cross-sectional finding of chronologic transition result from a rapid rise of late life depression in Korea.
Link Selection Algorithm of UWB Communications Considering Fading Statistics
Jinwon Choi,Yu-Suk Sung,Jeong-Wook Kim,Seong-Cheol Kim 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
This paper presents the link selection algorithm of Ultra Wide Band (UWB) communications considering fading statistics. In this algorithm, UWB devices decide the wireless link considering not only received signal strength but also fading statistics. Fading statistics follows the proposed channel model to the existence of line-of-sight (LOS).