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생애이력 기반 특고압 전기설비 안전관리 서비스를 위한 시스템 기술 개발
안윤영,정상우 대한전기학회 2022 전기학회논문지 Vol.71 No.12
Accidents occurring in high-voltage electrical equipment cause human injury, so the demand for accident prevention and maintenance of electrical equipment is increasing. ICT technology has been introduced to safety management services, which have been mainly managed based on human, and an electrical safety management system is developing to prevent electrical disasters and electrical equipment failures. The personal electric equipment is defined as a power distribution system that receives the electricity with a voltage of 1000 V or more or a receiving capacity of 75kW or more from a utility and uses the electricity at the receiving location such as a building or a factory. This paper describes the implementation of a system to provide safety management services of electrical equipment based on the life cycle, including the installation, inspection, safety management, and disposal of high voltage electrical installations. And it shows the demonstration site to which the development system is applied.
Voluntary Disclosure, analyst following, forecast accuracy and Dispersion : Evidence from Korea
안윤영,장진호,이정희 대한경영학회 2007 대한경영학회 학술발표대회 발표논문집 Vol.2007 No.1
This paper examines how the frequency of voluntary disclosure is associated with the number of analyst following and the analysts'earnings forecast characteristics. Our results indicate that analysts are more attracted to the firms that provide greater level of voluntary disclosure. Our finding complements prior research that used different measure of disclosure, such as analysts' rating and other information voluntarily disclosed in annual reports. Negative association between the frequency of voluntary disclosure and analysts' forecasts error indicates that more frequent voluntary disclosures lowers analysts' forecast error by reducing the uncertainty in analysts' earnings forecast. We also find that the increased level of voluntary disclosure reduces dispersion of forecasted earnings. Our finding suggests that voluntary disclosure plays a role in reducing information asymmetry between firm and analysts as well as among analysts.
안윤영,김성혜,정상진,강현주,An, Y.Y.,Kim, S.H.,Jeong, S.J.,Kang, H.J. 한국전자통신연구원 2020 전자통신동향분석 Vol.35 No.1
This paper describes an IoT-based electrical safety management system for managing the electrical power distribution systems in factories or buildings and for managing private electrical devices in apartment complex. The IoT-based electrical safety management system collects IoT data from the electrical facilities or devices to provide various electrical safety services. In some cases, it uses an IoT adaptor to collect data from legacy facilities. By monitoring and analyzing the IoT data, it is possible to provide protection from and prevent electrical hazards. In addition, an IoT-based electrical safety management system can benefit from using the IoT identification system and standardized data model of the electrical facilities and devices. An IoT identification system is used to increase manageability of large-scale electrical facilities which consists of numerous IoT devices. A standardized data model is used to support interoperability. This paper also explores some international and Korean standards related to IoT-based electrical safety management.
안윤영,장진호 韓國公認會計士會 2007 회계·세무와 감사 연구 Vol.45 No.-
본 연구는 2002년부터 2005년까지 4년 동안 국내 재무분석가의 순위자료와 이익예측자료를 이용하여, 재무분석가의 명성과 이익예측 허딩 간의 관계에 대하여 살펴보았다. 첫째, 명성이 높은 재무분석가들은 명성이 낮은 재무분석가들보다 유의적으로 낮은 허딩더미를 보고하였으며, 명성이 높은 재무분석가일수록 허딩확률이 낮았다. 이는 명성이 높은 재무분석가가 명성이 낮은 재무분석가 보다 낮은 수준의 허딩행태를 보이고 있음을 의미한다. 둘째, 명성이 낮은 재무분석가는 명성이 낮은 재무분석가들의 컨센서스 보다 명성이 높은 재무분석가들의 컨센서스에 보다 더 허딩하고 있음을 발견하였다. 이는 명성이 높은 재무분석가의 이익예측치는 재무분석가 시장에서 선도적인 예측치로서의 역할을 수행하고 있음을 의미한다. 종합적인 분석결과 재무분석가의 명성은 재무분석가의 허딩행태에 영향을 미치는 주요 요인임을 발견하였다. Using a Korean financial analyst ranking and earnings forecast data, this study examines the relations between the financial analyst reputation and earnings forecast herding during a four year period from 2002 to 2005. First, we find that highly reputed financial analysts show significantly lower herding dummy than other reputed ones. And highly reputed financial analysts tend to have a lower likelihood of earnings forecast herding. It indicates that financial analysts with higher reputation show lower herding behavior than other analysts. Second, lower reputed financial analysts herd more on the consensus of higher reputed financial analysts than that of lower reputed analysts. It means that earnings forecast of financial analysts with higher reputation plays a pivotal role as leading forecast in Korean financial analyst market. Taken as a whole, we provide interesting evidence that the reputation of financial analysts is a major determinant of financial analysts' herding behavior.
안윤영,장진호 한국경영학회 2007 한국경영학회 통합학술발표논문집 Vol.2007 No.8
본 연구는 2002 년부터 2005 년까지 4 년 동안 국내 재무분석가의 순위자료와 이익예측자료를 이용하여, 재무분석가의 명성과 이익예측 허딩 간의 관계에 대하여 살펴보았다. 첫째, 명성이 높은 재무분석가들은 명성이 낮은 재무분석가들보다 유의적으로 낮은 허딩더미를 보고하였으며, 명성이 높은 재무분석가일수록 허딩확률이 낮았다. 이는 명성이 높은 재무분석가가 명성이 낮은 재무분석가 보다 낮은 수준의 허딩행태를 보이고 있음을 의미한다. 둘째, 명성이 낮은 재무분석가는 명성이 낮은 재무분석가들의 컨센서스보다 명성이 높은 재무분석가들의 컨센서스에 보다 더 허딩하고 있음을 발견하였다. 이는 명성이 높은 재무분석가의 이익예측치는 재무분석가 시장에서 선도적인 예측치로서의 역할을 수행하고 있음을 의미한다. 종합적인 분석결과 재무분석가의 명성은 재무분석가의 허딩행태에 영향을 미치는 주요 요인임을 발견하였다. Using a Korean financial analyst ranking and earnings forecast data, this study examines the relations between the financial analyst reputation and earnings forecast herding during a four year period from 2002 to 2005. First, we find that highly reputed financial analysts show significantly lower herding dummy than other reputed ones. And highly reputed financial analysts tend to have a lower likelihood of earnings forecast herding. It indicates that financial analysts with higher reputation show lower herding behavior than other analysts. Second, lower reputed financial analysts herd more on the consensus of higher reputed financial analysts than that of lower reputed analysts. It means that earnings forecast of financial analysts with higher reputation plays a pivotal role as leading forecast in Korean financial analyst market. Taken as a whole, we provide interesting evidence that the reputation of financial analysts is a major determinant of financial analysts` herding behavior.