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-20℃ 조건에서의 보온양생방법 변화에 따른 슬래브 콘크리트의 온도이력
한상윤(Han Sang-Yoon),허영선(Heo Young-Sun),정상현(Cheong Sang-Hyeon),안상구(Ahn Sang-Ku),한민철(Han Min-Cheol),한천구(Han Cheon-Goo) 대한건축학회 2011 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.31 No.2(구조계)
This study investigates the effect of heat curing methods and bubble sheets on the temperature history and strength development of the slab concrete exposed to -20℃. Test results showed that due to the heat curing methods and insulation of bubble sheets, the temperature of all concretes maintained over O℃. In particular, the concrete insulated by the bubble sheets with four layers resulted in the highest temperature history inside the concrete and the highest strength.
On the alternation of the modesty suffix in Middle Korean
Sang-Cheol Ahn,Jung-Kil Han 한국음운론학회 2010 음성·음운·형태론 연구 Vol.16 No.1
This paper reanalyzes the phonological alternation of the 15<SUP>th</SUP> century Middle Korean pre-final modesty suffix showing the various alternating forms, - s? p-,-z? p-, -c? p-,-s? β-, -z? β-, -c? β-,-s?m-, -z?m-, -c?m-, s’? β-, -z’? β-, -c’? β-, etc. As this suffix is no longer used in Modern Korean, there have been very few accounts on the phonological variations, compared with those on syntactic characteristics (H.-K. Kim 1947, Heo 1953, B.-H. Ahn 1961, C.-W. Park 1996, Y.-P. Kim 2002, etc.). There remains, however, a controversy over the underlying representation of this suffix in that those two segments /?/ and /β/ are extinct in the Modern Korean phonemic inventory. Based on this historical background, this paper attempts to analyze the phonological nature of this suffix from a new perspective. To this end, we propose an underspecified feature geometric representation of this pre-final suffix, reflecting the ambivalence of the initial and the final consonants. And this proposal for the underspecified representation is supported by various alternating forms. Finally, we conclude this paper by illustrating how the Middle Korean form has been changed to the Early Modern Korean variants in terms of the constraint ranking relationship and the change of hierarchy. Here we employ the combination tableau format (McCarthy 2008) in order to show the clear ranking relationship among the constraints.