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유정완,주선미,이승준,조민철,조유지,정이영,이종덕,김호철 대한결핵및호흡기학회 2019 Tuberculosis and Respiratory Diseases Vol.82 No.4
Background: Although the frequency of respiratory viral infection in patients with pulmonary acute respiratory distress syndrome (ARDS) is not uncommon, clinical significance of the condition remains to be further elucidated. The purpose of this study was to compare characteristics and outcomes of patients with pulmonary ARDS infected with influenza and other respiratory viruses. Methods: Clinical data of patients with pulmonary ARDS infected with respiratory viruses January 2014–June 2018 were reviewed. Respiratory viral infection was identified by multiplex reverse transcription–polymerase chain reaction (RT-PCR). Results: Among 126 patients who underwent multiplex RT-PCR, respiratory viral infection was identified in 46% (58/126): 28 patients with influenza and 30 patients with other respiratory viruses. There was no significant difference in baseline and clinical characteristics between patients with influenza and those with other respiratory viruses. The use of extracorporeal membrane oxygenation (ECMO) was more frequent in patients with influenza than in those with other respiratory viruses (32.1% vs 3.3%, p=0.006). Co-bacterial pathogens were more frequently isolated from respiratory samples of patients with pulmonary ARDS infected with influenza virus than those with other respiratory viruses. (53.6% vs 26.7%, p=0.036). There were no significant differences regarding clinical outcomes. In multivariate analysis, acute physiology and chronic health evaluation II was associated with 30-mortality (odds ratio, 1.158; 95% confidence interval, 1.022–1.312; p=0.022). Conclusion: Respiratory viral infection was not uncommon in patients with pulmonary ARDS. Influenza virus was most commonly identified and was associated with more co-bacterial infection and ECMO therapy.
Oscillation Quenching in Coupled Different Oscillators
유정완,김칠민,Dae-Sic Lee,박영재 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.2
When any two different nonlinear oscillators are mutually coupled with each other, their trajectories converge to their own unstable fixed points in a proper coupling strength region. We theoretically analyze the phenomenon of oscillation quenching by mutually coupling the Rössler oscillator with a linear oscillator. Also, we numerically investigate this phenomenon in the mutually coupled system of a Lorenz and a Rössler oscillator. Through these studies, we find that oscillation quenching is a universal behavior that appears when any two different oscillators are mutually coupled.
유정완,서광원,장세진,오연목,심태선,김우성,이동순,이상도,최창민 대한의학회 2010 Journal of Korean medical science Vol.25 No.6
The Relationship between the Presence of Chromosomal Instability and Prognosis of Squamous Cell Carcinoma of the Lung: Fluorescence in situ Hybridization Analysis of Paraffin-embedded Tissue from 47Korean Patients
갈치(Trichiurus lepturus)의 선도 판정을 위한 관능평가 및 화학적 분석에 따른 품질 평가
유정완,김현재,설다은,고지윤,김성희,양지영,이양봉 한국수산과학회 2019 한국수산과학회지 Vol.52 No.6
The purpose of this study was to measure pH, trimethylamine (TMA), and total volatile basic nitrogen (TVB-N) as indicators of freshness during largehead hairtail Trichiurus lepturus storage, and to compare these indicators with those obtained by the sensory evaluation of quality index method (QIM) sensory evaluation. Largehead hairtail samples were stored at 4°C and evaluated every 3 days until decay. The QIM sensory evaluation indicated scores of 0, 8.9, and 20 on storage days 0, 6, and 20, respectively. By day 15, the samples were completely decayed. The pH slowly increased during the storage period, reaching a maximum of 7.4. In the day 6, TMA and TVB-N contents were 2.97 and 15.57 mg/100 g, respectively. Thus, at 4°C, the largehead hairtail starts to decay after 6 days and, after 9 days, cannot be consumed safely.