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- 저자 : 조혜성(Hye Sung Cho) (검색결과 72 건)
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마이크로 채널 내에서 세포의 크기 및 위치에 따른 전단응력의 해석
조혜성(Hye-Sung Cho),이성훈(Sung-Hoon Lee),박민철(Min-Cheol Park),권건우(Keon-Woo Kwon),서갑양(Kahp-Yang Suh) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
We present simple functions of shear stress on an adherent cell trapped within narrow microchannel. There are many cell traps or docking methods in micro fluidic applications, but we classify the cell docking methods into three types by trapped cell position in microchannel and perform several computational fluid dynamics simulations. Based upon the cell radius R, channel height H, channel length L, we define the dimensionless geometric factor (G.F) as maximum shear stress over wall shear stress(τmax /τwall). In here, the wall shear stress τwall and the maximum shear stress τmax are linearly proportional to inlet average velocity. So G.F is not dependent on inlet average velocity. Finally we can calculate the maximum shear stress very simply as a function of inlet velocity and G.F. This study shows that the maximum shear stress on a cell can be decreased by 10?¹ using well-shape-geometry docking. All analysis performed by COMSOL Multiphysics 3.3 A.
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Secondary stress in Modern Greek
조혜성(Hye-Sung Cho) 한국음운론학회 2005 음성·음운·형태론 연구 Vol.11 No.3
'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.
This paper reexamines secondary stress in Modern Greek. Debates about secondary stress are as follows: (a) the relative prominence of two stresses found in the cliticized words; (b) the presence and role of rhythmic secondary stress. In this paper, it is shown that the added stress, in the process of cliticization, rather than the original lexical stress, is the most prominent because the former satisfies primary-specific constraints, EndRule-R, and *Final-Long-Lapse. Also, it is demonstrated that the presence of rhythmic stress in the phrase-level is phonologically justified based on vowel reduction/elision phenomena. A cophonology approach proposed by Anttila (2002) is employed here to handle two different sets of co-existing stress patterns, that is, those of words and cliticized words. Phrasal rhythmic stress is accounted for by interaction between *Clash constraint and *Lapse constraints, along with basic stress assignment principles. Significantly, there is a split in anti-lapse constraints into *Lapse, *Final-Long-Lapse, and *Lapse_(Left). Of greater importance is to avoid lapse within final three syllables and lapse to the left of a stronger stress than avoid just adjacent unstressed syllables in Modern Greek.
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조혜성 ( Hye Sung Cho ) 21세기영어영문학회 2014 영어영문학21 Vol.27 No.4
The goal of this paper is to cross-linguistically examine the equivalence between a single heavy-syllable foot and a two-light syllable foot in the rhythmic grouping. In spite of their bimoraicity nature in quantity, (σ.μμ)F=(σ˘ μσ˘ μ)F does not function equally across languages under the guidance of quantitative asymmetry between iambs and trochees proposed by Hayes (1995). In iambic system languages the iambic-specific phonological process such as Iambic Lengthening attempts to be the best quantitative shapes of disyllabic uneven iambs (LH) by means of lengthening the strong branch of (LL). As a result, the rank of (H) > (LL) comes out. The Trochaic Shortening process does the same role in the trochaic system languages to reach the harmonic goal of disyllabic even trochee (LL), producing (LL) > (H), otherwise (LL) and (H) are not scaled each other. Therefore, the equivalence between (σ.μμ)F and (σ˘μσ˘ μ)F does not seem to be a universal principle but a strong linguistic tendency which is varied with the presence of language-specific phonological processes like Iambic Lengthening and Trochaic shortening and their hierarchical constraint rankings wiith other constraints.
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조혜성(Hye-Sung Cho),김홍남(Hong-Nam Kim),김재관(Jae-Kwan Kim),서갑양(Kahp-Yang Suh) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Recently, nanoimprint lithography method has been used to fabricate polymer nanostructures on various substrates such as Si wafer, metal-layer, organic or inorganic materials. Accordingly, the extensive efforts have been made to obtain small polymer nanostructures by using special mold, which having much small size of pattern. Meanwhile, the polymeric residual layer that remains under the nanostructures after process of nanoimprint, is not thin compared with the height of nanostructures. Frequently, polymeric nanostructure is used as barrier in etching process, additional process will be needed to remove the remained residual layer. In this research, we demonstrate very thin residual polymeric layer under nanostructures that leads to direct etching of substrate.
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조혜성 ( Hye Sung Cho ) 21세기영어영문학회 2015 영어영문학21 Vol.28 No.4
The goal of this paper is to reexamine the proper applications of NONFINALITY constraints, in particular, NONFINALITY(´σ) constraint and NONFINALITY (FT) constraint within Optimality Theory (OT). To properly describe the prosodic status of final syllables in languages with trochaic systems like Latin and English, we propose that the foot-leveled NONFINALITY(FT) constraint be replaced with a new NONFINALITY(σweak-in-foot) constraint regulating the foot membership of word-final syllables. Although NONFINALITY(FT) constraint is for antepenultimate stress patterns in more than 3-syllabled words, it fails to account for the stress patterns of 2-syllabled words in size because they are undersized for the constraint application. With the ranked NONFINALITY(´σ ) constraint and NONFINALITY(σweak-in-foot) constraint interaction, we can capture and describe both of the avoided prosodic structures, word-final stressed syllables and weak-footed syllables word-finally. NONFINALITY(FT) constraint still survives to reduplicate the effects of Foot Extrametricality within constraint-based approaches.
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