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Staphylococcus lugdunensis에 의한 감염성 심내막염 1예
최성호,박현구,변승운,구동회,강호석,장항제,김양수,우준희,김영휘,최상호 대한감염학회 2006 감염과 화학요법 Vol.38 No.5
Staphylococcus lugdunensis is a coagulase-negative staphylococcus (CNS) that is commonly found on the human perineal skin. Contrary to other CNS, S. lugdunensis is a rare contaminant in cultures and has the potential to cause clinically significant infections, including infective endocarditis. Infective endocarditis due to S. lugdunensis have been known to resemble endocarditis due to S. aureus because of its aggressive clinical course and high mortality. We report a case of infective endocarditis caused by S. lugdunensis in a 21-year-old woman. She was cured of the infection with surgical and antibiotic therapy. S. lugdunensis에 의한 감염성 심내막염은 국내에서보고가 없었던 매우 드물지만 다양한 합병증과 높은 사망률을 보이는 감염증이다. 저자들은 S. lugdunensis가 수술적 치료와 항생제 치료로 완치된 감염성 심내막염 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다.
간세포암종에 대한 간동맥 화학색전술 후 발생한 급성호흡곤란증후군
조윤원,이정미,최자윤,유동훈,차라리,오혜원,김홍준,민현주,김현진,정운태,이옥재,하창윤,이선영 이화여자대학교 의과학연구소 2013 EMJ (Ewha medical journal) Vol.36 No.1
Transcatheter arterial chemoembolization (TACE) has become an effective alternative treatment strategy for patients with inoperable hepatocellular carcinoma (HCC). Although TACE is relatively safe, acute respiratory distress syndrome associated with pulmonary lipiodol embolism is a rare and potentially fatal complication. We report a rare case of acute respiratory distress syndrome after TACE for inoperable HCC. A 75-year-old man, with huge HCC in right lobe, was treated by TACE for the first time. Seven hours after uneventful TACE procedure, he felt dyspneic and his oxygen saturation recorded by pulse oximetry (SpO2) fell to 80% despite of applying non-rebreathing mask. He underwent mechanical ventilation with a protective ventilatory strategy. We experienced a case of acute respiratory distress syndrome after TACE for HCC.
Effect of Distraction Task on Driving Performance of Experienced Taxi Drivers
( Hyun Jun Kim ),( Mi Hyun Choi ),( Jung Chul Lee ),( Sung Jun Park ),( Ul Ho Jeong ),( Ji Hye Baek ),( Byung Chan Min ),( Dae Woon Lim ),( Soon Cheol Chung ),( Hyung Sik Kim ) 한국감성과학회 2014 춘계학술대회 Vol.2014 No.-
This study investigated the effects of distraction tasks, such as Sending Text Message (STM) task with cellphone and Searching Navigation (SN) task with car navigation system, on driving performance of experienced taxi drivers. Subjects performed driving only for the first 1 min (Control phase). For an additional 1 min (Task phase), they performed Driving Only, Driving + STM, or Driving + SN while driving. For all events, driving performance during the Task phase was evaluated by car control data such as average following distance, speed deviation, Anterior-Posterior Coefficient of Variation (APCV), Medial-Lateral Coefficient of Variation (MLCV). For Driving Only, Driving + STM, and Driving + SN, change of Skin Conductance Level (SCL) from the Control phase to the Task phase, relative change of SCL, was calculated to investigate change of activation level of sympathetic nervous system. Compared to Driving Only, during Driving + STM or Driving + SN, relative change of SCL was increased. Compared to Driving Only, during Driving + STM or Driving + SN, average following distance, speed deviation, APCV, and MLCV increased. It can be concluded that, even for experienced taxi drivers, distraction tasks increase workload, increased the difficulty to control a car, and detracted from safe driving.
Effect of Distraction Task on Driving Performance of Experienced Taxi Drivers
Hyun-Jun Kim,Mi-Hyun Choi,Jung-Chul Lee,Sung-Jun Park,Ul-Ho Jeong,Ji-Hye Baek,Byung-Chan Min,Dae-Woon Lim,Soon-Cheol Chung,Hyung-Sik Kim 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.5
This study investigated the effects of distraction tasks, such as Sending Text Message (STM) task with cellphone and Searching Navigation (SN) task with car navigation system, on driving performance of experienced taxi drivers. Subjects performed driving only for the first 1 min (Control phase). For an additional 1 min (Task phase), they performed Driving Only, Driving + STM, or Driving + SN while driving. For all events, driving performance during the Task phase was evaluated by car control data such as average following distance, speed deviation, Anterior-Posterior Coefficient of Variation (APCV), Medial-Lateral Coefficient of Variation (MLCV). For Driving Only, Driving + STM, and Driving + SN, change of Skin Conductance Level (SCL) from the Control phase to the Task phase, relative change of SCL, was calculated to investigate change of activation level of sympathetic nervous system. Compared to Driving Only, during Driving + STM or Driving + SN, relative change of SCL was increased. Compared to Driving Only, during Driving + STM or Driving + SN, average following distance, speed deviation, APCV, and MLCV increased. It can be concluded that, even for experienced taxi drivers, distraction tasks increase workload, increased the difficulty to control a car, and detracted from safe driving.
전현규(Jun Hyun Kyu),김재훈(Kim Jae Hoon),김종운(Kim Jong Woon),박준서(Park Jun Seo) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
To get competitiveness in international markets, it is essential to provide low acquisition, maintenance and operation cost with high reliability, availability and maintainability. It can be achieved by lowering development cost, making proper maintenance planning and scheduling strategies, allocating man power and logistic cost properly. In this paper, we introduces the research on making a model for estimating the life cycle cost of newly developing magnetic levitation train system in Korea. To develop a proper life cycle cost model, we broadly analyzed specs and standards and compared the life cycle cost model developed in other country. Finally, we suggests strategies to develop an unique model for the magnetic levitation train system developing in Korea.
Change of neuronal activations induced by the passive perception of driving speed difference.
Kim, Hyun-Jun,Yi, Jeong-Han,Kim, Hyung-Sik,Chung, Soon-Cheol,Baek, Ji-Hye,Lee, Jung-Chul,Park, Sung-Jun,Jeong, Ul-Ho,Gim, Seon-Young,Kim, Sung-Phil,Lim, Dae-Woon,Choi, Mi-Hyun Pergamon Press 2015 Bio-medical materials and engineering Vol.26 No.1
<P>The change of neuronal activation due to the passive perception of various driving speeds in comparison to a reference driving speed was assessed using functional Magnetic Resonance Imaging. Videos recorded in real driving conditions on the road at driving speeds of 50, 70, 90, and 110 km/h were shown as visual stimuli. An experiment consisted of three blocks, each having a control phase (50km/h) and a stimulation phase (70, 90, or 110 km/h). In the passive perception of various driving speed differences, the areas related to visual cognition and spatial attention such as temporal, occipital, parietal, frontal areas, and cerebellum were activated. As the driving speed difference increased, the number of activated voxels also increased in the areas related to visual cognition. However, the visual cognition related areas showed a different pattern from the spatial attention related area with an increase of the driving speed difference. This implies that each brain area has a different level of involvement in the passive perception of the driving speed difference, although both visual cognitions related areas and spatial attention related area are related to it.</P>
Kim, Hyun-Jun,Park, Hyun-Kyung,Lim, Dae-Woon,Choi, Mi-Hyun,Kim, Hyun-Joo,Lee, In-Hwa,Kim, Hyung-Sik,Choi, Jin-Seung,Tack, Gye-Rae,Chung, Soon-Cheol Medknow PublicationsMedia Pvt Ltd 2013 Neural regeneration research Vol.8 No.3
<P>The supply of highly concentrated oxygen positively affects cognitive processing in normal young adults. However, there have been few reports on changes in cognitive ability in elderly subjects following highly concentrated oxygen administration. This study investigated changes in cognitive ability, blood oxygen saturation (%), and heart rate (beats/min) in normal elderly subjects at three different levels of oxygen [21% (1 L/min), 93% (1 L/min), and 93% (5 L/min)] administered during a 1-back task. Eight elderly male (75.3 ± 4.3 years old) and 10 female (71.1 ± 3.9 years old) subjects, who were normal in cognitive ability as shown by a score of more than 24 points in the Mini-Mental State Examination-Korea, participated in the experiment. The experiment consisted of an adaptation phase after the start of oxygen administration (3 minutes), a control phase to obtain stable baseline measurements of heart rate and blood oxygen saturation before the task (2 minutes), and a task phase during which the 1-back task was performed (2 minutes). Three levels of oxygen were administered throughout the three phases (7 minutes). Blood oxygen saturation and heart rate were measured during each phase. Our results show that blood oxygen saturation increased, heart rate decreased, and response time in the 1-back task decreased as the concentration and amount of administered oxygen increased. This shows that administration of sufficient oxygen for optimal cognitive functioning increases blood oxygen saturation and decreases heart rate.</P>