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부유식 태양광-파력 복합발전 개념 및 원자력발전소 비상전원을 위한 응용
차경호(Cha, Kyung-Ho),김정택(Kim, Jung-Taek) 한국신재생에너지학회 2011 신재생에너지 Vol.7 No.4
This paper presents a Combined solar-wave Power Generation (CPG) concept that the CPG unit is maintained as buoyant at the level of sea water and it is also supported by a submerged tunnel, with the aim of supplying emergency electric power during the station blackout events of nuclear power plants. The CPG concept has been motivated from the 2011 Fukushima-Daiichi Accidents due to the loss of both offsite AC power and emergency diesel power caused by natural hazards such as earthquake and tsunami. The CPG is conceptualized by applying different types and different sites for emergency power generation, in order to reduce common cause failures of emergency power suppliers due to natural hazards. Thus, the CPG can provide a new mean for supplying emergency electric power during station blackout events of nuclear power plants. For this application, the CPG requirements are described with a typical configuration at the ocean side of a submerged tunnel.
차경호(Kyung-Ho Cha),강수정(Soo Jung Kang),최영진(Youngjin Choi) 제어로봇시스템학회 2009 제어·로봇·시스템학회 논문지 Vol.15 No.3
This paper proposes a knee-wearable robot system for assisting the muscle power of human knee by processing EMG (Electromyogram) signals. Although there are many muscles affecting the knee joint motion, the rectus femoris and biceps femoris among them playa core role in the extension and flexion motion, respectively, of the knee joint. The proposed knee-wearable robot system consists of three parts; the sensor for measuring and processing EMG signals, controller for estimating and applying the required knee torque, and actuator for driving the knee-wearable mechanism. Ultimately, we suggest the motion control method for knee-wearable robot system by processing the EMG signals of corresponding two muscles in this paper. Also, we show the effectiveness of the proposed knee-wearable robot system through the experimental results.
Hitachi 7600-110ⓡ 에 의한 Lipoprotein(a) 정량검사의 평가
차경호 ( Kyung Ho Cha ),김승희 ( Sung Hee Kim ),이인숙 ( In Suk Lee ),변창섭 ( Chang Sub Byun ),김덕진 ( Duk Jin Kim ) 대한임상검사과학회 2001 대한임상검사과학회지(KJCLS) Vol.33 No.2
Background : The Lipoprotein(a), [Lp(a)] is one of the atherogenic lipoproteins and it is known to be the independent risk factor on premature atherosclerosis and cardiovascular disease(CHD). It is an atherogenic lipoprotein that is assembled from a Low density lipoprotein(LDL). Traditional methods for measuring Lp(a) are ELISA and immuno electrophoresis. However these method have slow reaction and no easy work measurement for Lp(a). Recent1y, the development of specific and sensitive assays for Lp(a) using specific polyclonal antibodies for Lp(a) were done, including radioI1llmunoassay, nephelometric assay(NA), and turbidimetric I1llmunoassay(TIA). We evaluated the Hitachi76OO-1 1O (Hitachi Co., Japan) using the TIA [TAC-3 Test Lp(a) (MBL Co., Japan) ] in the measurement of LP(a) and compared. Its results to those of the one-step sandwich ELISA (IMMUNOZYM Lp(a): Immuno GMBH.Co., Germany) using nephelometer in order to replace the Hitachi 7600-110 for quantitative analysis of Lp(a). Methods : Lp(a) were measured by the Hitachi 7600-110 using TIA and the one-step sandwich ELISA using nephelometer in the sera from 60 patients. πle performance characteristics were evaluated, linearity, in comparison with one-step sandwich ELISA. A1so, precision were evaluated, three level pooled serum throughput following NCCLS evaluation protocols (EPlO-A).The reference range was determined by Hitachi 7600-110 from 120 hea1thy subjects. Results : When the Lp(a) value of 20.l514.91(mean, SD)mg/dL by the Hitachi7600-1 1O was compared with that of 26.31 19.01 (mean, SD)mg/dL by ELISA, coefficients of correlation of 0.9858 was obtained. The regression equation was Y(Hitachi76OO-1 1O)= 0.773x (ELISA)-O.l89(r=0.9858, n=6O). CVs of Lp(a) measured by Hitachi 7600-110 was 2.97% at 10. 85mgldL, 1.15% at 35.53mg.dL, and 1.32% at 68.l3mgldL. The precision was excellent in each group. The linearity was acceptable. The reference range in this study was 0-28.9mgldL Lp(a). a Conclusions πle Hitachi 76OO-1 1OVY using TIA compared with the one-step sandwich ELISA using Nephelometer, showed good coefficient of correlation and precision. Therefore the Hitachi 76OO-1 1O@ can replace the one-step sandwich ELISA for quantitative analysis of Lp(a)
전기증착법으로 제조된 다공성 텅스텐 산화물의 고대비 전기변색 특성
박성혁,모호진,임재근,김상권,최재효,이승현,장세화,차경호,나윤채,Park, Sung-Hyeok,Mo, Ho-Jin,Lim, Jae-Keun,Kim, Sang-Gwon,Choi, Jae-Hyo,Lee, Seung-Hyun,Jang, Se-Hwa,Cha, Kyung-Ho,Nah, Yoon-Chae 한국분말야금학회 2018 한국분말재료학회지 (KPMI) Vol.25 No.1
In this study, we synthesize tungsten oxide thin films by electrodeposition and characterize their electrochromic properties. Depending on the deposition modes, compact and porous tungsten oxide films are fabricated on a transparent indium tin oxide (ITO) substrate. The morphology and crystal structure of the electrodeposited tungsten oxide thin films are investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). X-ray photoelectron spectroscopy is employed to verify the chemical composition and the oxidation state of the films. Compared to the compact tungsten oxides, the porous films show superior electrochemical activities with higher reversibility during electrochemical reactions. Furthermore, they exhibit very high color contrast (97.0%) and switching speed (3.1 and 3.2 s). The outstanding electrochromic performances of the porous tungsten oxide thin films are mainly attributed to the porous structure, which facilitates ion intercalation/deintercalation during electrochemical reactions.
이영준(Lee Young-Jun),최종균(Choi Jong-Gyun),차경호(Cha Kyung-Ho),천세우(Cheon Se-Woo),이장수(Lee Jang-Soo),권기춘(Kwon Ki-Choon),정의진(Jung Ui-Jin) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
The Railroad Safety Act"s regulation reads as follows. “The Minister of Construction and Transportation may qualify and authorize the product to guarantee performance and safety of parts, machine, and device used in Railway fields.” Another regulation reads as follows. “The guidelines about targets, standards, and procedures of Quality and Authority in first provision are decided as Ministry of Construction and Transportation Decree.” The software used in rail cars and facilities is considered as a railway product. Therefore, it is qualified and authorized for acquiring the safety of rail cars and facilities. The software businesses shall again a Quality and Authority for applying a software to the rail cars and facilities. This paper regulates some guidelines that are needed to develop a software. The procedures that a software developer performs are divided by plan, requirement, design, implementation, and maintenance. The procedures that a software verification person performs are classified by verification plan, requirement verification, design verification, implementation verification, testing verification, maintenance verification, and safety activity. The entire processes and detailed activities to develope and verify a software are described as new guidelines.