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        검색결과 5

        1.
        2020.09 KCI 등재후보 구독 인증기관 무료, 개인회원 유료
        The charge transfer (CT) excitation energy calculations of H2N-(CH=CH)3-X and the H2N-H.....H-X structures with the various electron acceptors (-X) were performed with comparing the accuracy of various calculation methods, such as B3LYP, long-range corrected (LC)-BLYP, and EOM-CCSD. Both intra-molecular and inter-molecular systems showed a tendency for CT excitation energy to decrease as the electronic accepting property increases, and LC-BLYP showed the best accuracy in both inter- and intra-molecular CT excitation energy. In this study, it was confirmed that unexpectedly larger range separation parameter(μ) values of LC-BLYP showed better results of CT excitation energy.
        4,000원
        2.
        2006.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In this paper we attempt to introduce a new teaching method for Spanish grammar education, based on the Movement theory of the Generative Grammar and we want to show that this new method can explain Spanish grammar phenomenon more easily and effectively than the existing school grammar. For this purpose, we start with some nominal phrases and simple sentences of the Korean and Spanish languages. We find out the basic difference of the two languages by comparing their nominal phrases and simple sentences from the point of view of Movement theory. The difference is that the Korean language does not have movement phenomenon but the Spanish language does. This difference is consistent in all of complex clauses with relative pronouns. We show that with this theory we can teach Spanish nominal phrases, simple clauses, exclamative clauses and relative clauses in a unitary and effective method of explication without a supposition ad hoc.
        5,400원
        3.
        1993.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Many researchers have discussed how membrane performance can be enhanced through an understanding of polymer science and engineering. The understandings of transport in porous membrane are used to achieve the isolation of certain components from mixtures. Particular emphasis is placed on the applicability of membrane separations for the isolation of macromolecules[1]. An awareness of membrane structure characteristics is required for the rational design of membranes for specific and/or new applications. This understanding rests on the knowledge of fields such as polymer thermodynamics[2], polymer adsorption [3, 4], diffusion in polymers[5, 6], reaction mechanism[7], and the dynamic behavior[8, 9] of polymer in porous membrane.
        4,600원
        4.
        1998.10 KCI 등재 서비스 종료(열람 제한)
        본연구에서는 Einstein과 Chien(1954)의 이론은 토대로 하여 하천의 모형연구에 적합한 이동상 모형이론을 수립하였다. 흐름의 상사 ()와 유사이동의 상사 ()의 변화에 따른 총 하상변동량의 거동을 비교함으로써 적용성을 검토하였다. 그 결과 의 값 또는 의 값이 작을 수록 총 사항변동량은 크게 발생하는 것으로 나타났다. 본 연구에서 수립된 모형이론은 각 모형이론의 제한조건을 완화한 것으로서 실험장소 또는 모형사의 제한으로 모형이론을 이상적으로
        5.
        1994.12 KCI 등재 서비스 종료(열람 제한)
        This article accounts for the formation of wh-questions and yes-no questions in English within the Minimalist Program of Chomsky (1993). Wh-words and such auxiliaries as do, have, be, and modal verbs in interrogative sentences are a -moved according to the economy principle of movement theory. In an interrogative construction wh-fronting and auxiliary movement arise from the necessity of fixing parameters and word order through morphological checking processes. To be checked off morphological properties of an interrogative sentence, lexical categories expressing meaning structure move to functional categories parameterizing syntactic structure. Constraints based on the economy principle, of course, are applied in the course of the morphological checking in a checking domain. With respect to morphological properties that should be checked off in wh-questions and yes-no questions, we propose that there exist three combinations of WH-feature and Q-feature in complementizer(=C) : [+ WH, +Q] for wh-extraction from an object or an adjunct, [+WH, -Q] for wh-extraction from a subject, and [-WH, +Q] for yes-no question formation. Other important condition for the formation of an interrogative sentence is that C has a tense operator which must be checked off by the tense operator feature of the tense verb in the tense domain C.