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( Jaekyeong Lee ),( Yu-il Kim ),( Ha-young Park ),( In-jae Oh ),( Tae-ok Kim ),( Hong-joon Shin ),( Yong-soo Kwon ),( Sung-chul Lim ),( Sun-seog Kweon ),( Hyungjoo Oh ) 대한결핵 및 호흡기학회 2020 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.128 No.-
Backgrounds Cigarette smoking is a major cause of lung cancer and COPD. Smoking cessation should be recommended at any age to prevent disease. But a question can be raised if recommendation to stop smoking in elderly is equally effective compared with non-elderly people. Because myth like stereotype exists about elderly people that they are prone to think they have lived long enough so that they don't try to put any effort to change their old habit. In this study, we will find if the abstinence rates are significantly different between non-elderly(< 65) and elderly( >=65) age group. Methods Current smokers had participated in intensive smoking cessation camp at Chonnam national university hospital between 2015 and 2017. We performed a retrospective study to figure out the differences of abstinence success rate between elderly and non-elderly groups. We followed up patients at 6 months from start of abstinence and 2019 year for long term follow-up. Logistic regression analysis was done to figure out which factors were associated with long term success rate of smoking cessation including age group, comorbidities, CO value, regular exercise which were statistically significant in chi-square test or standard t-test. Results Total 351 patients were enrolled. 51 of 81 (62.9%) patients in elderly and 74 of 181 (40.8%) in non-elderly were successful in maintaining abstinence at the time of long term follow up. Age group was not statistically significant in logistic regression analysis (p = 0.07, 95% CI = 0.956 - 3.205). 6 month abstinence was statistically significant in long-term success of abstinence (p = 0.003, 95% CI = 1.311 - 3.910). Conclusion There was no inferior result of abstinence success in the elderly. We can suggest elderly smokers quit their old habit because they are as eager as young-aged people to change.
소형 무인기 추진용 덕티드 팬의 공력특성에 관한 실험적 연구
김재경(Jaekyeong Kim),최현민(Hyunmin Choi),차봉준(Bongjun Cha),이상효(Sanghyo Lee),조진수(Jinsoo Cho) 한국추진공학회 2008 한국추진공학회 학술대회논문집 Vol.2008 No.5
본 연구에서는 소형 무인기의 추진체로 사용되는 덕티드 팬의 공력특성 연구를 위해 덕티드 팬 입/출구의 3차원 유동장 측정과 추력 특성 분석을 수행하였다. 3차원 유동장 측정은 정온형 열선유속계를 통하여 수행되었으며, 추력은 육분력 밸런스를 이용하여 측정하였다. 측풍의 영향을 고려하기 위해 덕티드 팬을 풍동시험기내 유동방향에 대하여 90° 회전시켜 설치하였다. 풍동시험을 통하여 4.5 m/s의 측풍으로 인한 덕티드 팬 유동장 및 추력의 변화를 분석하였다. The experimental analysis on a ducted fan for the propulsion system of a small UAV were performed. To investigate the aerodynamic characteristics of the ducted fan, flow fields at inlet and outlet were measured using a hot-wire anemometry. Thrusts were measured with the six-component balance with due regard to the cross wind. To reproduce the cross wind effect, the ducted fan was aligned to 90° rotated direction against flow direction in the wind tunnel. In this paper, the variation of the flow fields and thrust according to the cross wind were analyzed.
SungWan Kim,YoungChul Chung,YoungShin Kang,JaeKyeong Kim,JiEun Jang,Min Jhon,JuYeon Lee,JaeMin Kim,IlSeon Shin,JinSang Yoon 대한신경정신의학회 2018 PSYCHIATRY INVESTIGATION Vol.15 No.2
Objective-To examine the reliability and validity of the Korean version of the 16-item Prodromal Questionnaire (KPQ-16) in nonhelp-seeking university students. Methods-aAmong 2,246 university students participated in the initial screening, 257 subjects with KPQ-16 scores ≥4 were interviewed.The criteria for ultra-high risk (UHR) of psychosis of the Comprehensive Assessment of At-Risk Mental States (CAARMS) were the gold standard for diagnosis. An exploratory modified version of the questionnaire (mKPQ-16), to which three items from the Eppendorf Schizophrenia Inventory were added, was also used to compensate for items on thought and cognitive problems. Result-Seventeen subjects met the CAARMS criteria for UHR of psychosis. The area under the receiver operating characteristic curve (AUROC) was highest for the mKPQ-16 total score (AUROC=0.831, p<0.001). The use of cutoff total scores of 7 for the mKPQ- 16 and 6 for the KPQ-16 resulted in the best balance of sensitivity (76.5% and 64.7%, respectively) and specificity (75.4% and 71.2%, respectively). Conclusion-The Korean versions of the PQ-16 are good instruments for screening for psychosis risk in university students. This validation of a questionnaire version with a small number of items may make it feasible to screen large numbers of young adults in the community.