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휴대용 열차접근경보장치에 적용되는 GPS모드와 RF모드의 거리 및 속도 분석
권기진(Ki Jin Kwon),온정근(Jung-Ghun Ohn),심재복(Jae-bock Shim),최영하(Choi Yung ha) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
A portable train approaching warning device can be used in order to reduce accidents of the workers on the rail, who are working without recognizing the approaching train, and to secure the safety of the workers. It can be installed in the train so that workers can recognize the approaching train. However, it is not easy to identify the location of the train precisely. In this study GPS and RF devices, which are used to calculate the location of the train were reviewed, to see how much error tolerance they have in the field, to analyze the distance for normal transmission between the receiver and transmitter, to verify the conformity of the portable train approaching warning device developed as a prototype model to the current rail system, and to provide the related fields with the analysis results to improve the existing or application technology. Additionally, test methods to locate the train were introduced and each test result was compared and analyzed.
열차속도에 따른 GPS형 열차접근경보기의 경보안정성 분석
권기진(Ki Jin Kwon),온정근(Jung-Ghun Ohn),심재복(Jae-bock Shim),최영하(Choi Yung ha) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
GPS type portable-alarm-system is composed of satellite receiving equipment, signal transmission equipment, etc. Time errors occur because of the processing methods of the satellite receiving equipment and signal generator, the positional error of GPS itself, etc. With the recent rise of train speed, it becomes very important to secure the stability of portable-alarm-system from time errors. The present study estimated errors caused by the structure of portable-alarm-system, GPS errors, etc., and verified them. In addition, it examined the effects of such errors on portable-alarm-system according to train speed.
온정근(Jung-Ghun Ohn),권기진(Ki Jin Kwon),최영하(Choi Yung ha),심재복(Jae-bock Shim) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
Platform screen dorr (PSD) is equipment composed of screens and doors on the platform of subways or light trains, separating the platform from the railroad. The equipment is opened and closed in connection to the doors of carriages. In order to operate the system safely, it is important to understand the characteristics of key parts. There are many parts and environmental factors such as voltage, current and temperature change but the present study measured the change rate of torque and energy changes according to the temperature of the driving motor and analyzed the characteristics of the changes and examined the features of a motor required for stable PDS and the conformability of control programs.
金正權,崔泳夏 韓社大學 1973 대학논문집 Vol.4 No.-
本調査硏究는 大邱保明學校 男女兒童 50名을 대상으로 6個 부분의 운동능력을 조사하여 운동능력에 있어서의 남여간의 차이점을 밝히고 또 6個 운동 영역 상호간의 관계를 고찰 하였다. 본 조사연구에서 나타난 결과를 요약하면 다음과 같다. A. 男女間의 평균과 표준편차의 고찰에서 5個 운동영역은 모두 남자가 여자보다 우수하나 유독 손의 기교 능력부문만은 여자가 우수한 면을 보이고 있다. B. 男子가 우수한 5個 운동영역 중에서도 가장 월등히 우수한 영역은 구간운동 부문이다. C. 6個운동영역의 t검정 결과는 동작모방능력만 男女間 差異가 없고 나머지 5個 영역은 모두 남여간에 차이가 있다. D. 6個운동영역 상호간의 관계에 있어서는 걷기능력과 서기능력, 서기능력과 손의 기교능력 그리고 손의 기교능력과 손의 협응능력이 각각 가장 높은 相關으로 나타났다. E. 서기능력과 동작모방능력 그리고 동작모방능력과 구간운동 능력이 각각 가장 낮은 相關으로 나타났다.
최영하,박정옥,박완석,이태형,이승호 영남대학교 의과대학 1989 Yeungnam University Journal of Medicine Vol.6 No.1
본원 산부인과에서 산전 초음파 검사에 의해 거대 태아 경부 낭종으로 진단, 중절시킨 임신 22주 태아의 부검 결과 낭포성 히그로마로 판명되어 이에 문헌 고찰과 함께 보고하는 바이다. Fetal cystic hygroma is a rare congenital malformation of the lymphatic system appearing as a single or multicolulated fluid-filled cavity, most often in the neck. A case of fetal nuchal cystic hygroma was diagnosed by ultrasonography at 22 weeks of gestation and the diagnosis was confirmed at autopsy. We present the case with a brief review of literature.