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RISS 인기검색어
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- 저자 : 정대식(Daesik Jeong) (검색결과 4 건)
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Collinear Deflection Method를 이용한 열전도계수 측정에 관한 이론적 연구
정대식(Daesik Jeong),오주현(Juhyun Oh),김현정(Hyunjung Kim),유재석(Jaisuk Yoo) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
Collinear deflection method is one of photothermal deflection methods. In the measurement process, both of pump beam and probe beam are irradiated vertically on the transparent sample. And probe beam is deflected by refractive index variation due to the temperature gradient inside samples. The purpose of this study is to measure the thermal property of thin film materials using collinear deflection method. Especially, theoretical basis is built for thermal property measurement using collinear deflection method. From this, parameters such thickness of sample, modulation frequency and so on, that can influence the investigated measurement accuracy of collinear deflection method.
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정대식(Jeong, Daesik) 부산대학교 인문학연구소 2022 코기토 Vol.- No.97
이 글은 한국어의 부사성 의존명사가 분포한 ‘하다’ 구문의 구조와 구성요소에 대하여 연구하였다. 부사성 의존명사가 분포한 ‘하다’ 구문은 ‘척하다, 체하다, 듯하다, 양하다,···’ 등의 형식을 지닌 구문으로 이전에는 일괄적으로 의존용언 구문이나 자립용언 구문으로 다루어져 왔다. 하지만 이 글에서는 동사 구문과 형용사 구문이 각각 다른 것으로 보고 내부 구성요소를 살펴보았다. 먼저 동사 구문은 의존동사 ‘하다’가 ‘자립화’를 거쳐 자립동사가 된 것으로 보았는데, 비전형적인 대격조사 ‘을/를’의 분포로 그것이 가속화되었을 것이라 추측하였다. 그리고 형용사 구문은 전형적인 의존형용사 구문으로 부사성 의존명사에 의존하는 것으로 간주하였다. 또 두 구문 모두 부사성 의존명사는 보문절에 의존하는 것으로 해석하여, 두 서술어가 동일한 주어를 공유하는 것으로 해석하였다. ㄱ. 철수가 [<SUB>NP</SUB> [<SUB>CP</SUB> 철수가 아픈] 척]한다. ㄴ. 영이가 [<SUB>NP</SUB> [<SUB>CP</SUB> 영이가 아픈] 듯]하다. 그리고 부사성 의존명사와 ‘하다’가 하나의 언어형식으로 해석되는 이유에 대하여 그것이 접어적 구성이기 때문이라고 보았는데, 특히 ‘척하다’ 등은 자립용언임에도 접어적 구성을 형성하여 그것이 의존동사에서 기원되었음을 주장하였다. This paper discusses the structure and its compositional factors of the ‘hada’ sentence’ where adverbial dependent nouns are distributed. Previously, the ‘hada’ sentence’s distribution of the adverbial dependent nouns has been wholly referred to as either a dependent verb sentence or an independent verb sentence. However, this paper now sees the verbal sentence and adjectival sentence as two separate entities and analysed its compositional factors separately. In a verbal sentence, the dependent verb ‘hada’ goes through a process called ‘to make independent’ and becomes an independent verb. It is assumed that the use of the typical accusative marker ‘eul/reul’ accelerated this process. On the other hand, an adjectival sentence follows the typical dependent verbal sentence and is dependent on the adverbial dependent noun. All adverbial dependent nouns in both sentences are interpreted to be dependent on complement clauses and both predicates are therefore considered to share the same subject as well. ㄱ. 철수가 [<SUB>NP</SUB> [<SUB>CP</SUB> 철수는 아픈] 척]한다. ㄴ. 영이가 [<SUB>NP</SUB> [<SUB>CP</SUB> 영이는 아픈] 듯]하다. In addition, the clitic composition is perceived to be the reason for considering the adverbial dependent noun and ‘hada’ as one word. In particular, ‘cŭkhada and others formed the clitic compositions even though it was independent verbs, claiming that it originated from dependent verbs.
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김진화(Jinhwa Kim),정대식(Daesik Jeong),김현정(Hyunjung Kim),유재석(Jaisuk Yoo) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
In these days, the importance of thermal properties measurement for many kinds of materials becomes increasing since those are applied to a vast range of industries. This study considered non-contact methods which could reduce the error like thermal resistance and was unnecessary destruction of samples. Among them, the method using photothermal effect was used to measure thermal properties. The photothermal deflection method is suited to thermal property measurement of thin film samples that have the multi layer structure since the probe beam is not directly reflected to samples. Aluminum film, TiO₂ film and Si₃N₄ film with micro/nanometer thickness were selected as the subject of study and thermal conductivities of them were measured. Samples with many kinds of thickness for each materials were prepared to measure thermal conductivities variation depending on their thickness. And it was observed that thermal conductivity was reduced as the thickness was reduced.
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