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Dokyun Kim 한국사회학회 2015 韓國社會學 Vol.49 No.3
This paper aims at explaining the dynamics of welfare capitalism in Japan. As opposed to previous studies, it emphasizes the role of fiscal system by raising the question of how savings encouragement combined with low taxation affected the welfare dynamics. During the industrialization period, the Japanese government mobilized private savings as if it were public money. This capital mobilization strategy made the features of the Japanese welfare system exceedingly different from those of western countries, both by making it possible for the government to maintain the small tax state and by enabling households to actively utilize savings assets as a welfare measure. This distinctive institutional setting had an enormous effect on welfare dynamics after the oil shocks of the 1970s by making it difficult for the government to introduce the new consumption tax and by increasing the importance of assetbased welfare. With the emphasis on fiscal system, this paper contributes to the development of comparative welfare capitalism studies which have explored the possible linkage of welfare and capitalism.
Two-Dimensional Mechanism of Hovering Flight by Single Flapping Wing
Dokyun Kim,Haecheon Choi 대한기계학회 2007 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.21 No.1
Numerical simulations are conducted to investigate the mechanism of hovering flight with an inclined stroke. The Reynolds numbers considered are 150 and 1000 based on the maximum translational velocity and wing chord length. Three mechanisms responsible for high vertical force generation, suggested by Dickinson et al.(1999), are confirmed and more elaborated in the present study. First, we show that the vertical force during downstroke is larger than that from the quasi-steady analysis due to the delayed stall mechanism. Second, the wing-wake interaction of reducing the negative vertical force during the stroke reversal is explained in terms of the reattachment of the vortex, shed previously during downstroke, on the wing, by which the wing is submerged in a low pressure region during upstroke and has a smaller negative vertical force. Finally, the rotational circulation is explained by advancing the rotation timing of the wing at supination using both the numerical simulation and inviscid potential theory.
3D TCAD Analysis of Hot-Carrier Degradation Mechanisms in 10 nm Node Input/Output Bulk FinFETs
Dokyun Son,Sangbin Jeon,Myounggon Kang,Hyungcheol Shin 대한전자공학회 2016 Journal of semiconductor technology and science Vol.16 No.2
In this paper, we investigated the hotcarrier injection (HCI) mechanism, one of the most important reliability issues, in 10 nm node Input/Output (I/O) bulk FinFET. The FinFET has much intensive HCI damage in Fin-bottom region, while the HCI damage for planar device has relatively uniform behavior. The local damage behavior in the FinFET is due to the geometrical characteristics. Also, the HCI is significantly affected by doping profile, which could change the worst HCI bias condition. This work suggested comprehensive understanding of HCI mechanisms and the guideline of doping profile in 10 nm node I/O bulk FinFET.