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( Suhyeon Yoo ),( Yoon Suk Jung ),( Jung Ho Park ),( Hong Joo Kim ),( Yong Kyun Cho ),( Chong Il Sohn ),( Woo Kyu Jeon ),( Byung Ik Kim ),( Dong Il Park ) The Editorial Office of Gut and Liver 2014 Gut and Liver Vol.8 No.2
Background/Aims: Many patients with inflammatory bowel disease (IBD) often complain of fatigue. To date, only a few studies in Western countries have focused on fatigue related to IBD, and fatigue has never been specifically studied in Asian IBD patients. The aim of the present study was to in-vestigate the fatigue level and fatigue-related factors among Korean IBD patients. Methods: Patients in remission or with mild to moderate IBD were included. Fatigue was assessed using the Functional Assessment of Chronic Illness Therapy-Fatigue and the Brief Fatigue Inventory. Corresponding healthy controls (HCs) also completed both fatigue question-naires. Results: Sixty patients with Crohn disease and 68 patients with ulcerative colitis (UC) were eligible for analysis. The comparison group consisted of 92 HCs. Compared with the HCs, both IBD groups were associated with greater levels of fatigue (p<0.001). Factors influencing the fatigue score in UC patients included anemia and a high erythro-cyte sedimentation rate (ESR). Conclusions: Greater levels of fatigue were detected in Korean IBD patients compared with HCs. Anemia and ESR were determinants of fatigue in UC patients. Physicians need to be aware of fatigue as one of the important symptoms of IBD to better understand the impact of fatigue on health-related quality of life. (Gut Liver 2014;8:148-153)
Variation of Liftoff height with diluents in Laminar Nonpremixed Lifted Flame
Suhyeon Oh(오수현),Kyu Ho Van(반규호),Chun Sang Yoo(유춘상),Oh boong Kwon(권오붕),Suk Ho Chung(정석호),Jeong Park(박정) 한국연소학회 2019 KOSCOSYMPOSIUM논문집 Vol.2019 No.11
With diluents (CO₂, N₂, and He) added to fuel or oxidizer stream, stationary lifted flame in non-premixed laminar coflow-jet has been studied. For CO₂ and N₂ diluted in oxidizer stream, liftoff height significantly increased with diluent mole fraction, while in He-diluted case liftoff height slightly increased. In fuel-diluted stream, liftoff height as adding He and N₂ slightly increased, but CO₂-diluted flame oscillated. To investigate change of liftoff height with diluent mole fraction, laminar burning velocity, effects of diluents, and buoyancy were considered.