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Observational Properties of GSC 2855-0585 in the Vicinity of the Eclipsing Binary V432 Per
구재림,이재우,김승리,이충욱,이병철,Koo, Jae-Rim,Lee, Jae Woo,Kim, Seung-Lee,Lee, Chung-Uk,Lee, Byeong-Cheol 한국천문학회 2012 天文學會報 Vol.37 No.2
During the photometric runs of the eclipsing binary V432 Per in 2006, we serendipitously discovered peculiar light variations of GSC 2855-0585 that imaged on the same target field. Its brightness decreased about 0.02 mag for about 0.15 days in all B, V, and R bands. The depth, duration, and box-shaped light curves are very similar to those of typical transiting exoplanets. We gathered the time-series data of GSC 2855-0585 from the SuperWASP public archive and detected the same light variations with a period of about 2.406 days. The period and transitlike features were confirmed by photometric follow-up observations at a predicted epoch in 2010 November. In order to estimate the mass of the companion that produced the light variations, we obtained 10 high-resolution spectra with different orbital phases in 2010 November and 2011 October-December. The radial velocities showed large variations of about 44 km/s. It indicates that the transitlike light variations do not originate from a transiting exoplanet, but from the single-lined spectroscopic eclipsing binary with a cool dwarf companion. Using the photometric and spectroscopic data, we estimated the physical parameters of the eclipsing binary GSC 2855-0585, such as orbital period, effective temperature, surface gravity, and mass.
우리나라 교통정책 변천과정 분석연구 : 육운정책을 중심으로 Focused on Surface Transportation
이재림 건국대학교 1993 대학원 학술논문집 Vol.37 No.-
This study is to review the past and present Trasnportion policies in Korea from 1910s to 1990s. Also this study intends to forecast the transportation policy issues in the future. For this purpose, in this study the surface transportation policies those have been implemented by Government(Ministw of transportation) are classified into 3 large groups-transportation industry policy, carrying ploicy and urban transportation policy-and analized the characteristics of each policy according to the times of categories-before 1960s, in 1960s and in 1970s and finally after 1980. The results of the analysis are as follows- 1 the transportation policies changed dramatically in accordance with environmental changes, especially the rapid growth in car owneIShip. 2 the charging potterns of transportation policy could be summerized as, -from regulation to deregulation -from road-oriented to railroad-oriented -from bus to subway -from passenger transportation-oriented to freight transportation-oriente Viewing on the basis of the results, the future po1icy issues in transportation will be 1.expanding of railroad and subway system 2.promoting public transportation system 3.economic deregulation on transportation industry 4.improvement of freight carrying system