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최영택,변상교 ( Y . T . Choi,S . K . Byoun ) 한국열처리공학회 1992 熱處理工學會誌 Vol.5 No.1
This content is a part of the results of the study on the development of the vacuum carburizing technology. In this study the vacuum carburizing furnace being used was the furnace that developed through the joint project between KIMM and Kyung-Pook Heat Treating Co. from June 1988 to Nov. 1990. And the used carburizing gas was the propane gas and the introducing methods of the gas applied two methods such as pulse and constant pressure. By this study we established the basis of the furnace manufacturing technology and of the processing technology in the vacuum carburizing. Above all in this work there are notable meanings in a viewpoint of the foremost research in home. Hereafter, we are going to industrialize the vacuum carburizing technology by improving the results of the present work and by developing the process for the mass production.
Brazing 과 Metallizing에 의한 세라믹/금속 접합재 잔류응력의 유한요소 해석
최영택(Y.T.Choi),박명균(M.K.Park),박세만(S.M.Bahk),선동주(D.J.Sun) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
In this study finite element method(FEM) is utilized to determine residual stress distributions induced by heat generated during joining processes of ceramics and metals.<br/> The finite element analysis is focused on the joining area. That comprises the interfacial area between a metal and a insert-layer. The inser-tlayer itself and adjoining area between the insert-layer and a ceramic.<br/> The residual stress distributions on the joining area are analyzed as functions of thicknesses and yield stresses of the insert-layer(Brazing Filler Metal). And for different kinds of metals including SUS304 and SM45C.<br/> Two typical joining processes are considered in this investigation: Active Metal Brazing and Metallizing. Stress distributions on the joining areas are computed for both processes and are compared with one another. This comparison can lead to the better joining method in reducing the residual stresses and consequently provide improved joining technologies.<br/>
LCC의 시장진입과 추가적 수요성장세와의 관계 연구: 한·중 지방도시 항공자유화 확대를 위한 전략적 선택
최영택 ( Youngtech Choi ),이재섭 ( Jaesup Lee ) 관광경영학회 2020 관광경영연구 Vol.100 No.-
The purpose of this study is to analyze and evaluate the growth trend of passenger demand in accordance with the national LCCs’ market penetration, and as a result, to present the necessity and basis for expanding the Korea-China Open Skies. This paper undertakes a case-building analysis approach and examines changes of passenger demand growth rates in the market after the Korean national LCCs entered the Open Skies zone, taking advantage of the strategic window created by the Open Skies Agreements between Korea and the other contracting parties. The case-building analysis conducted on Japan, China, Thailand and Vietnam is based on the air passenger traffic results performed on the above destinations over a period of time, which therefore is fundamentally “outcome evaluation”(Stake. 1995) and this study has what might be termed ‘face-value credibility’ as it provides evidence and data tables with which readers can easily identify, nonetheless, interviews also took place with experts from three(3) different Korean flag carriers to not only add perspective but also validate the findings. In the findings, the relation of additional demand growth with the LCCs’ entry into the open skies zone such as Japan, Thailand and Vietnam, with the exception of China having high barriers to entry of Korean LCCs, was found to be very positive, and was also confirmed by the expert survey. Accordingly, it is reasonable to assume that such additional demand growth will occur even if LCCs expand their entry into the Korea-China routes.
소셜미디어(SNS)를 활용한 기업의 PR 활동에 관한 연구 소셜미디어 및 기업 특성을 중심으로
최영택 ( Young Taek Choi ),김상훈 ( Sang Hoon Kim ) 한국PR학회 2013 PR연구 Vol.17 No.3
The purpose of the research is to analyze the correlation between corporate factors and characteristics of social media that influence corporation`s selection of SNS accounts. Based on theory of Technology Acceptance Model(TAM), the research discovered relationships among characteristic factors of SNS media, corporate characteristics, and variables of corporate PR activities, along with reasons for selecting corporate SNS accounts and operational trends. By analyzing data collected through a survey, diversity of content, facebook was used most as an official corporate PR account, followed by Twitter and blog. All three media, including twitter, facebook, and blog, were used for external communication and marketing activities. Among them, Twitter`s characteristic was propagation, openness, and accessibility; that of facebook was diversity in content and networking character; that of blog was diversity, accessibility, and openness. Among these characteristics of SNS media, diversity in content influenced corporation`s marketing activities, external and internal communication activities the most. Propagation was a factor influencing risk management activity.
최영택(Choi Young Taek),조기성(Cho Gi Sung) 대한공간정보학회 2006 대한공간정보학회지 Vol.14 No.3
본 연구에서는 유비쿼터스 기반 도로재해관리시스템 개발에 본 연구에의 목적이 있으며, 이를 위한 기반기술은 무선인터넷통신모듈, 모바일모듈 및 서버모듈로 구분하여 개발 하였다. 이외 같이 개발된 기반기술은 도로재해관리 뿐만 아니라 각종 모바일 및 유비쿼터스 응용솔루션개발에 사용될 수 있으며, 도로재해현장에서 정보취득에 필요한 기 구축된 수치형태의 각종 DB를 실시간으로 수신하고 이를 기초로 현정 자료를 취득할 수 있으므로 현장 자료 취득의 정확도 및 신뢰도를 제고할 수 있다. 또한 이를 수신한 웹기반의 서버모듈 즉, 웹기반 도로 재해관리시스템에서는 기존의 도로관련 각종 자료에 절대좌표를 이용하여 현장재해정보를 연계하여 볼 수 있어, 정확한 의사결정을 실시간으로 수립하여 현장에 전송할 수 있다. 이러한 유비쿼터스 도로재해관리시스템의 기반기술 개발을 통하여 기존 도로재해관리 방법의 한계를 극복할 수 있는 방안을 제시하였다. This study is aimed at the development of ubiquitous based road disaster management system. The fundamental technologies used for developing this system are classified into three modules - wireless internet communication module, mobile module and server module. These fundamental technologies can be used not only for developing road disaster management system but also for developing various mobile or ubiquitous systems. With this system, workers can download many DB (Digital map, Attribute information etc.) from server to the field in realtime. The accuracy and objectivity of the DB could be improved with these informations collected at fields because these data can be used as basic data for road disaster information collection. Because in the web based server module - Web based Road Disaster Management System (URDMS) - field disaster information was showed link up with exist DB on road by absolute coordinate, the decision making with all of the field information was made and it sent to a field staff in realtime. The problems of current road disaster management rule can be solved by this URDMS.
김기혁 ( Kim Gi-hyeok ),최영택 ( Choi Young-taeg ),정영수 ( Jeong Young-soo ),김인태 ( Kim In-tae ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.2
해상 강교량은 특성상 혹독한 부식환경에 가설되어 있으며 장기간 공용중인 강구조물의 경우 염분에 의한 부식손상과 도막노화로 구조물의 정기적인 보수도장이 필요하다. 또한 부식손상과 도막노화, 온습도, 비래염분등의 다양한 원인에 의하여 발생된다. 하지만 도막표면에 부착되는 염분량은 비래염분량의 영향뿐만 아니라 구조형식 및 강우 유무에 따라 변화하게 되며, 해상강교량에서 12개월간 도막표면에 부착되는 염분량을 측정 하였다. 그리고 구조형식에 따라 누적 부착염분량의 차이로 도막노화 및 부식손상의 속도가 다르게 나타날 수 있으며, 보수도장을 위한 의사결정 과장에 기초자료로 활용할 수 있다.