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Minseok Kim,Minkyu Kim,Doogyum Kim,Jongwoo Lee 한국철도학회 2012 International Journal of Railway Vol.5 No.2
Railroad signaling systems are to control intervals and routes of trains. There are ATS, ATP, ATO and ATC system. Trains are operated in the section which is met on the signaling system because various signaling systems are used in Korea. Hence, trains are not operated in the section which is used in the other signaling system. To solve this problem, recently combined on-board system has been developed. The combined on-board system designed by doubling the ATS, ATP and ATC system to ensure the safety of system. The inductance of antenna is change and in return the resonance frequency of antenna is varied by the electromagnetic induction. Therefore, the information signal is not received exactly in the combined on-board system and in return accidents between trains occur. In this paper, electric model of the combined on-board system for considering the ATS and ATP antenna is presented. Moreover, the mutual inductance including the distance between the ATS and ATP antenna is calculated. As a result of the frequency response of the antennas, the mutual inductance met on operation range of resonance frequency is defined.
Kim, Minseok,Kim, Minkyu,Kim, Doogyum,Lee, Jongwoo The Korean Society for Railway 2012 International Journal of Railway Vol.5 No.2
Railroad signaling systems are to control intervals and routes of trains. There are ATS, ATP, ATO and ATC system. Trains are operated in the section which is met on the signaling system because various signaling systems are used in Korea. Hence, trains are not operated in the section which is used in the other signaling system. To solve this problem, recently combined on-board system has been developed. The combined on-board system designed by doubling the ATS, ATP and ATC system to ensure the safety of system. The inductance of antenna is change and in return the resonance frequency of antenna is varied by the electromagnetic induction. Therefore, the information signal is not received exactly in the combined on-board system and in return accidents between trains occur. In this paper, electric model of the combined on-board system for considering the ATS and ATP antenna is presented. Moreover, the mutual inductance including the distance between the ATS and ATP antenna is calculated. As a result of the frequency response of the antennas, the mutual inductance met on operation range of resonance frequency is defined.
A STUDY ON MEASUREMENT FOR LARGE SIZE OBJECTS WITH A NON-CONTACT TYPE CMM
Minseok Kim,Dongeun Lee,Sookhan Kim,Jeongnak Lee,Junchul Kim,Eungki Lee 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
Recently, efficient manufacturing of high precision is an important issue in modern industry as more variety of industrial products is being designed with compound surfaces. Rapid CAD data generation can be possible based on a non-contact type CMM of object through the use of reverse engineering. However, some registration to match the data measured from various directions into a common coordinate system is required. Also, the error can happen if it uses the conventional method to large product of thin thickness. So it is necessary to develop a new method, which was designed for the registration of large and thin products. Additionally, an algorithm to pick up coordinates for the newly designed method was proposed.
Kim, Minseok,Kim, Su Hyun,Lee, Sung Kuk,Kim, Taesung Royal Society of Chemistry 2011 The Analyst Vol.136 No.16
<P>We present a novel microfluidic device that enables high sensitive analyses of the chemotactic response of motile bacterial cells (<I>Escherichia coli</I>) that swim toward a preferred nutrient by sorting and concentrating them. The device consists of the Y-shaped microchannel that has been widely used in chemotaxis studies to attract cells toward a high concentration and a concentrator array integrated with arrowhead-shaped ratchet structures beside the main microchannel to trap and accumulate them. Since the number of accumulated cells in the concentrator array continuously increases with time, the device makes it possible to increase the sensitivity of detecting chemotactic responses of the cells about 10 times greater than Y-shaped channel devices in 60 min. In addition, the device can characterize the relative chemotactic sensitivity of chemoreceptors to chemoeffectors by comparing the number of cells in the concentrator array at different distances from the channel junction. Since the device allows the analysis of both the chemotactic responses and the sensitivity of chemoreceptors with high resolution, we believe that not only can the device be broadly used for various microbial chemotaxis assays but it also can further the advancement of microbiology and even synthetic biology.</P> <P>Graphic Abstract</P><P>We describe a microfluidic device that identifies the preferential chemotactic responses of bacterial cells toward carbon sources. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1an15308k'> </P>
( Minseok Albert Kim ),( Jeong-hoon Lee ),( Sungwon Chung ),( Sun Woong Kim ),( Jun Sik Yoon ),( Young Chang ),( Eun Ju Cho ),( Su Jong Yu ),( Yoon Jun Kim ),( Jung-hwan Yoon ) 대한간학회 2018 춘·추계 학술대회 (KASL) Vol.2018 No.1
Aims: The seroclearance of hepatitis B virus (HBV) surface antigen (HBsAg) is currently considered as a functional cure of chronic hepatitis B. However, there is still a lack of evidence whether the HBsAg-seroclearance is a reliable and durable indicator of HBV eradication. In this study, we aimed to evaluate the reliability and durability of NA-induced HBsAg-seroclearance. Methods: Among 1,100 patients with chronic hepatitis B, 33 patients who achieved HBsAg-seroclearance with NA treatment between January 2010 and December 2017 at a single referral center were analyzed retrospectively. HBsAg was examined using ELISA kit (ARCHITECT HBsAg Qualitative II; Abbott, Wiesbaden, Germany) and < 1.17 S/Co (~0.02 IU/mL) was defined as a negativity. Results: The median age at NA-induced HBsAg-seroclearance was 59.8 (range, 22.4-74.6) years and median NA treatment duration before seroclearance was 76.1 (range, 11.3-193.5) months. At the time of HBsAg-seroclearance, all patients had undetectable serum HBV DNA (< 20 IU/mL). Among them, 22 patients (66.7%) stopped NAs after HBsAg-seroclearance (the NA-off group) and the remaining 11 patients (33.3%) maintained NAs for median 23.5 (range, 5.0-49.8) months (the NA-maintenance group) after HBsAg-seroclearance. During follow-up period (median, 35.0 months; range, 4.7-89.9), two patients (one in the NA-off group and one in the NA-maintenance group) experienced HBsAg-seroreversion although their serum HBV DNA were not detectable. Of the two patents, a patient who are in the NA-maintenance group developed HBsAg-seroreversion at 19 months after HBsAg-seroclearance and again experienced HBsAg-re-seroclearance 17 months later. Interestingly, both patients experiencing HBsAg-seroreversion had hepatocellular carcinoma. Conclusions: A single time negative-conversion of HBsAg might not be a reliable and durable indicator of HBV eradication since there were a few cases of detectable HBV DNA and HBsAg-seroreversion. Thus, repeated evaluation of both HBsAg and HBV DNA might be necessary to confirm the functional cure of chronic hepatitis B undergoing antiviral treatment.