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정선구,최종섭 한국경영과학회 1989 한국경영과학회 학술대회논문집 Vol.- No.1
Considering the strategical planning in an organization, it is very important to decide the number of recruitee, promotee, and retirement during the planning time. This paper is to design the decision support system for manpower planning. This system consists of three modules : wastage analysis, grade atructure analysis, and manpower policy evaluation. The outputs of wastage and grade structure analysis module can be directly used as an input of the manpower policy evaluation module. The output of those modules can be displayed on the screen by the user's selection. The other type of output is the file for the users of operational level, which would help them to find the optimal manpower policy.
정선구,이광희,이형직,Jeong, S.K.,Lee, K.H.,Lee, H.J. 한국전자통신연구원 2020 전자통신동향분석 Vol.35 No.6
Along the advancement of mobile networks, fixed telephone networks are gradually advancing from legacy networks based on copper and circuit-switches to optical cables and packet-switched IP networks. Incumbent fixed-line telephone operators are facilitating the introduction of IP networks and are gradually converting to IP-based facilities according to the investment plans for each operator. As the PSTN's IP conversion exceeds a certain level and VoIP; (an alternative service); is activated, some countries; such as Europe; are considering terminating the PSTN service, centering on operators. In this paper, trends in the procedure, timing, and major issues related to the termination of an overseas PSTN are examined. The domestic status is also examined.
정선구,이상우,Jeong, S.K.,Lee, S.W. 한국전자통신연구원 2015 전자통신동향분석 Vol.30 No.4
와이파이 콜링 서비스란 Wi-Fi 네트워크 환경에서 음성전화 및 Short Message Service(SMS) 등의 이동전화서비스를 제공하는 것으로 Subscriber Identification Mobule(SM) 카드에 부여된 자신의 이동전화번호를 그대로 사용하여 음성전화 및 문자의 착 발신이 가능한 서비스이다. 아이폰6 출시 당시 와이파이 콜링 기능을 탑재하여 이슈가 된 바 있으며, 미국의 통신사업자인 T-Mobile 등이 커버리지 보완을 목적으로 적극적으로 서비스하고 있다. 본고에서는 와이파이 콜링 서비스의 특징, 유사 서비스와의 비교, 기술방식, 서비스 동향을 알아보고자 한다.