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전영석,장성민,강신길,Jeon, Young-Seog,Jang, Sung-Min,Kang, Shin-Gil 한국생산제조학회 2010 한국생산제조학회지 Vol.10 No.6
This paper presents a study of the influence of fixed pressure in turning. The effect of roundness error and diameter deformation were studied with respect to the fixed pressure applied inside the cylindrical work piece made by boring tool in CNC lathe. The boring tool used in this study is a tungsten carbide coated. The material of workpiece is SM45C and the machining method is dry cutting. Cutting conditions as cutting speed, feed rate and depth of cut are constant. Finally, the change of fixed pressure had influence on the roundness error and diameter deformation.
전영석(Jeon, Young Seok) 한국도시철도학회 2015 한국도시철도학회논문집 Vol.3 No.3
To prevent the expansion of the significant train accident due to the misjudgement of the commanded-type railway traffic controller, it is necessary to analyze the conventional train traffic control process of that and to complement the domestic train operation rule. In this study, based on the report of Korea Aviation and Railway Accident Investigation Board, the train accidents observed the domestic commanded-type railway traffic controller is examined. Furthermore, appropriateness of the domestic related rules is reviewed. The safety requirements of the commanded-type railway traffic control system are proposed.
전영석(Young-Seog Jeon),장성민(Sung-Min Jang),강신길(Shin-Gil Kang) 한국생산제조학회 2010 한국생산제조학회지 Vol.19 No.3
This paper presents a study of the influence of fixed pressure in turning. The effect of roundness error and diameter deformation were studied with respect to the fixed pressure applied inside the cylindrical work piece made by boring tool in CNC lathe. The boring tool used in this study is a tungsten carbide coated. The material of workpiece is SM45C and the machining method is dry cutting. Cutting conditions as cutting speed, feed rate and depth of cut are constant. Finally, the change of fixed pressure had influence on the roundness error and diameter deformation.
섬유보강 모르타르 패널 및 중공층에 의한 콘크리트의 내폭성능 평가
전영석 ( Young Seok Jeon ),김규용 ( Gyu Yong Kim ),남정수 ( Jeong Soo Nam ),김홍섭 ( Hong Sub Kim ),이태규 ( Tae Kyu Lee ),김무한 ( Moo Han Kim ) 한국건축시공학회 2010 한국건축시공학회 학술발표대회 논문집 Vol.10 No.2
Recently, building structure damage and number of lives lost by bomb terror is increasing. Therefore, in this study, it is aimed to present basic data for blast resistance performance of concrete structure with intermediate space by fiber reinforced mortar panel and explosion test. Fiber reinforced mortar specimen is produced by using PVA, PE and STF fiber. Distance between blast resistance panel and structure is each 0, 10, 30 and 50mm. In the explosion experimental, blast resistance of mortar has greatly improved by fiber reinforced. When blast resistance panel is installed in the structure, blast resistance has improved in more than 10mm air space.
전영석 ( Young Seok Jeon ),이희성 ( Hi Sung Lee ) 한국안전학회(구 한국산업안전학회) 2014 한국안전학회지 Vol.29 No.4
In the event of continued train operation being impossible as the result of a breakdown, it will be essential to dispatch a relieftrain to recover the broken down train. Operation of relief train carries with the risk of collision in the process of connection with brokendown train. The present study looks at the suitability of risk management procedures and associated problems in the light of case studiesof relief train operation, and of national legal standards and railroad company regulations. It looks at appropriate methods of riskmanagement and the problems that can arise. Based on the study a method is proposed of operating the relief train which is consistentwith appropriate risk management. The proposed method will improve the safety of relief train operation, It is hoped that the results of thestudy will be reflected in relevant laws and operating company regulations, and so contribute to enhancing the overall level of railroadsafety.
전영석(Young-Seok Jeon),안승호(Seung-Ho Ahn),정광우(Kwang-Woo Chung),김재문(Jae-Moon Kim),김철수(Chul-Su Kim),정종덕(Jong-Duk Chung),정락교(Rag-Gyo Jeong) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
To assure the safety of urban railway train, it is necessary to observe the specified driving principles under an essential condition during running on tracks. These principles arises from a great deal of experience for a long time and include safe distance between trains, the railway signaling, block system, regular block of the highest priority and driving prohibition of simple railway vehicle in the main track, etc. Therefore, it is important to apply these principles to domestic urban railway driving regulations and railway vehicle driving regulations. However, domestic urban railway administrator established his own operation rules within the regulation. In this study, domestic urban railway administration's own rules are examined and the appropriate driving regulation on the safe driving principles is proposed.