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Culture supernatant proteins of Brucella canis represented potential antigenicity
Jin Ju Lee(Jin Ju Lee),So-Ra Sung(So-Ra Sung),Eun Ji Yum(Eun Ji Yum),Sung Dae Yang(Sung Dae Yang),Min Hoe Lee(Min Hoe Lee),Bang-Hun Hyen(Bang-Hun Hyen),Moon Her(Moon Her),Hee Soo Lee(Hee Soo Lee) 한국예방수의학회 2018 한국예방수의학회 학술대회자료집 Vol.2018 No.-
Physiological Status Assessment of Locomotive Engineer During Train Operation
Yong-Soo Song,Jong-Hyen Baek,Do-Sik Hwang,Jeong-Whan Lee,Young-Jae Lee,Hee-Jung Park,Ju-Hyeon Choi,Heui-Kyung Yang 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.1
In this study, physiological status of locomotive engineers were measured through EEG, ECG, EDA, PPG and respiration signals from 6 subjects to evaluate their arousal status during train operating. Existence of tunnels and mechanical vibration of train using 3-axes acceleration sensors were recorded simultaneously and were correlated with operator’s physiological status. As the result of the analyzed subjects’ physiological signals, mean SCR was increased in the section where more body movement is required. The RR interval was decreased before and after train stop due to the higher level of mental tension. The intensity of beta wave of EEG was found to be higher before and after train stop and tunnel section due to the increased mental arousal and tension. Therefore, it is expected that the outcomes of the physiological signals explored in this study can be utilized as the quantitative assessment methods for the arousal status to be used for sleepiness prevention system for vehicles operators which can greatly contribute to public transportation system safety.
Physiological Status Assessment of Locomotive Engineer During Train Operation
Song, Yong-Soo,Baek, Jong-Hyen,Hwang, Do-Sik,Lee, Jeong-Whan,Lee, Young-Jae,Park, Hee-Jung,Choi, Ju-Hyeon,Yang, Heui-Kyung The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.1
In this study, physiological status of locomotive engineers were measured through EEG, ECG, EDA, PPG and respiration signals from 6 subjects to evaluate their arousal status during train operating. Existence of tunnels and mechanical vibration of train using 3-axes acceleration sensors were recorded simultaneously and were correlated with operator's physiological status. As the result of the analyzed subjects' physiological signals, mean SCR was increased in the section where more body movement is required. The RR interval was decreased before and after train stop due to the higher level of mental tension. The intensity of beta wave of EEG was found to be higher before and after train stop and tunnel section due to the increased mental arousal and tension. Therefore, it is expected that the outcomes of the physiological signals explored in this study can be utilized as the quantitative assessment methods for the arousal status to be used for sleepiness prevention system for vehicles operators which can greatly contribute to public transportation system safety.
Changes in volatile flavor compounds in steam-dried Allium hookeri root
Jun, Hyun-Il,Yang, Jae-Heon,Choi, Ji Yeon,Lee, Sung-Hyen,Song, Geun-Seoup,Kim, Kyong Su,Kim, Young-Soo Korean Society of Food Science and Technology 2016 Food Science and Biotechnology Vol.25 No.5
This study was carried out to identify volatile flavor compounds in Allium hookeri root (AHR) and steam-dried AHR. The volatile compounds were extracted using a simultaneous steam distillation and extraction (SDE) method and identified by gas chromatography/mass spectrometry (GC/MS) analysis. Forty volatile compounds, present at a concentration of 76.10 mg/kg, were identified in AHR, with sulfur-containing compounds (96.8%) as the major volatile compounds. On the other hand, in two and four times steam-dried AHR, 34 volatile compounds present at 5.96 mg/kg and 28 compounds present at 4.23 mg/kg were identified, respectively. This two and four times steam-dried AHR respectively contained sulfur-containing compounds (64.1 and 37.4%) and aldehydes (19.3 and 45.4%) as the dominant compounds. The sulfur-containing compounds decreased, whereas the aldehydes increased relative to levels in AHR with increased steam-drying time. This is the first report on volatile flavor compounds in AHR and steam-dried AHR.
양희경(Heui-Kyung Yang),이정환(Jeong-Whan Lee),이영재(Young-Jae Lee),이재호(Jae-Ho Lee),임민규(Min-Gyu Lim),백종현(Jong-Hyen Baek),송용수(Yong-Soo Song) 대한전기학회 2012 전기학회논문지 Vol.61 No.6
The study for the passenger’s comfortableness of vehicles and the arousal of car drivers has been done widely. On the other hand, there are few studies for the locomotive engineers. Human error means that the mistakes made by human, recently it receives attention in the field of safety engineering and human engineering. Comparing the operating condition of train with car, because of the simplification of the visual stimulus, the arousal level on the train goes down easily . The arousal level down makes judgement down, the accident risk from human error is getting bigger. In this study, we measured bio-signals(ECG, EDA, PPG, respiration and EEG) from 6 locomotive engineers to evaluate their arousal state while they operated the train. Also we recorded the 3 axes acceleration signal showing the vibration state of train. Also, the existence of tunnels were simultaneously measured. At the station section where the train speed goes down, the size of vector"s sum decreases because of reduced vibration. Beta component in EEG tends to increase at the entering point of each station and tunnel. It is due to the arousal reaction and tension growth. The mean SCR(skin conductance response) was more increased in neutral section. As the button control movement (body movement) increases in the neutral section, it is appeared that SCR increase. RR interval tends to gradually increase during train operation for 1 hour 40 minutes. However, It tends to sharply decrease at the stop station because strong concentration needed to stop train on the exact point. The engineer’s arousal reaction can be checked through analysing the bio-signal change during train operation. Therefore, if this analysing result is adopted to the sleepiness prevention caution system, it will be useful for the safety train operation.