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Lame Duck Presidency and Stock Returns
Youngsoo Kim,Jung Chul Park 한국재무학회 2015 한국재무학회 학술대회 Vol.2015 No.05
Recent studies highlight positive political effects on firm performance and stock returns. This paper shows that the positive value impact on the cross-sectional stock returns disappears in the lame duck presidency periods, defined as the last two years before the Presidential party change. We find that this phenomenon is not explained by other election characteristics. Additional tests suggest that the diminishing political effect in the lame duck periods is more pronounced for the small firms that are less able to hedge policy risk away and for the firms located in the states where residents more strongly support the President.
( Young Soo Kim ),( Young Hee Kim ),( Yeun Hee Jung ) 한국교육공학회 2000 Educational Technology International Vol.2 No.1
This study aims to examine the effect of the levels of learner self-direction on the interacion and satisfacion in the Web-Based Discussion Learning. The subjecys for the study were 24 undergraduate students. Based on the level of self-direction measured by Self-Directed Learning readiness Scale, these subjects were as-signed into two groups: one group including 11 students with the high level of self-direcion and the other consisting of 13 student with the low level. Concur-rent with asynchronous online discussions, the subjets received face-to-face classes once a week. To undertake the quantitative analysis of students` interacions, the research enu-merated the number of messages that the students uploaded of four discussion topics. For the qualitative analysis of collected data, Henri`s(1992) Content Anal-ysis Model was adopted. The follow-up survey was undertaken to analyze the students` satisfacion with the discussions. The results of statistical analyses indicated that: (i) the group of students with the high level of self-direction devoted to a greater nimber of interacions in the discussions than those with a lower level: (ii) the content, Analysis of two groups` Messages showed the difference only in metacorgnitive dimension: and (iii) the high level of satisfaction was seen in highly self-directed. In conclusion, this study suggests that learner self-direction has an effect on activities in online discussion.
Development of a Tip-Tilt Mechanism for a 1 m large mirror
Young-Soo KIM,Ju Heon Koh,Hwa Kyoung Jung,Pradipta Biswas,Ho June Jung,Ho-Sang Kim,Kyoung-Don Lee,Myung Cho,Hyo-Sung Ahn,Ho-Soon Yang,Byeong-Gon Park 한국항공우주학회 2012 한국항공우주학회 학술발표회 논문집 Vol.2012 No.11
A tip-tilt mechanism is one of the key technologies in satellite payloads for meteorology and remote sensing. The same technology is also used for ground telescopes to enhance the image quality. Giant Magellan Telescope is a next generation giant telescope, which contains a tip-tilt secondary mirror. A consortium led by Korea Astronomy and Space science Institute (KASI) is developing a prototype of the tip-tilt secondary mirror. The prototype is a full-size segment of the secondary mirror system, consisted of a dummy mirror, a mirror cell, three axial supports, a lateral support, and a vacuum device. Design, analysis, manufacturing, and assembly have been performed, and system test will be followed. In this paper, development of the prototype is presented and a sample test is shown. The tip-tilt technology will be beneficial to many fields related to precision control.