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송찬일,송상기,송각기 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2
Automobile alternator noises are composed of mechanical noise, ventilation noise and magnetic noise. The design of magnetic parts, fans, bearing, and the rotor has an effect on these noises. In running automobile alternator, these elements can generate noises and vibrations. To know the noise sources of the various alternator, the characteristics of noises are analyzed as rotating speed is increased. Also, this study analyze the harmonics of the noise for the various alternators. The results of this study can lead the instruction t o the noise reduction on the automobile alternator.
김찬기 대진대학교 1997 大眞論叢 Vol.5 No.-
Decomposed granite soil is typical residual soil in Korea and it is known as a problematic soil because the strength characteristics is changed significantly when it is exposed to air and mixed or contacted with water. The aim of this study is to evaluate its characteristics of strength for particle-crushing. Decomposed granite soil crushed particles by the drop down from 2 meters height 30, 50, 100, 150, 200 times. Each of samples accomplished the consolidated undiained trixial compression test under the various comfining pressure. And the undisturbed sample accomplished the consolidated undrained, consolidated drained triaxial compression test.
제주도 함덕연안해역의 해황·기상의 계절변동에 관한 연구
양성기,최찬문,김해동 濟州大學校海洋硏究所 1995 해양과환경연구소 연구논문집 Vol.19 No.-
Time series data of oceanic and meteorological elements observed by Marine Research Institute, Cheju National University are used to investigate seasonal variabilities in oceanic and atmospheric conditions. Heat ?? elements at the sea surface are derived from the data of the marine meteological reports by applying an aerodynamical bulk method. The seasonal variation of serveral heat flux elements were abnormal during the analysed period(June,1993 ∼ September, 1995), and it might be related to global-scale changes in the ocean-atmosphere system. And the oceanic condition of the northern Cheju Island was sensitive to the insolated solar radiation.
金基璨 慶北大學校 1984 論文集 Vol.37 No.-
In recent years there has been a surge of interest among linguists in the phenomenon of presupposition. The definition of presupposition has been attempted to make through the semantic account or the pragmatic account. In terms of the pragmatic accounts, the writer will try to analyze the presupposition of a sentence, with reference to the context in which the speaker and the hearer have a common belief. Finally, the following definition was made: "An utterance A pragmatically presupposes a proposition B iff A is appropriate only if B is mutually known by participants." The idea was to suggest that they can only be appropriately used if it is assumed in the context that the propositions indicated by the presupposition-triggers are true. After the survey of the presupposition-triggers, it can be inferred that the proposition carried by the triggers must belong to the common belief between the speaker and the hearer, and then can represent the old information features. In addition, the common belief was also classified in (56) in this paper. Refering to the cooperative principle and the discourse strategy, the presuppositions of various sentence structures were accounted for, with advantages of presupposition-trigger, within the pragmatic theory. In chapter V, the pragmatic account of presupposition was applied to the proposition carried by the Korean particles [-nun] and [-to], which indicates that the fact can be well explained that the particles [-nun], [-to] and others accompany the presuppositonal features and some of contextual features. In conclusion, it was investigated that the pragmatic account of presupposition is simpler and more inclusive than any other accounts.
徐贊基 慶北大學校 1965 論文集 Vol.9 No.-
It is necessary for geography teachers to choose and teach the important place names from the present texts of foreign geography for junior high school, because these texts are in the tendency of containing too much place names in them. But the teachers are in difficulties in teaching students, not only they do not know the optimum numbers of place names, but also they don't know which the important Place names are. This thesis is a study for the solution to these problems. 1. First: After the examination of all the present texts in use, the list of the average rate of frequency was made. (There are 13 kinds of geography texts.) Second: The questionnaire was sent to the geography teachers who are serving in 500 junior high Schools, and the written opinions necessary to decide the optimum numbers of place names could be synthesized. 2. These results showed that about 500 place names are necessary for the students to learn from the texts in junior high school. 3. These about 500 place names were classified into 3 classes: A class, B class, C class. From these classes, 316 place names contained in A and B class are called basic place names. 4. The analytical study was given to the about 500 place names selected as the optimum numbers, in the order of frequency and claass and kind in their structure.
(±)-6a, 7-Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo [b,d] pyran-9(8H)-one의 염소화 반응에 관한 연구
홍기운,육찬남,백승화 圓光大學校 1991 論文集 Vol.25 No.2
(±)-6a, Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo[b,d] pyran-9[8H]-one의 염소화 반응은 metal halide와 함께 18-crown-6존재하에m-chloroperbenzoic acid에 의해 산화반응이 일어났다. 이 반응계에서는 염소화 반응이 방향족 고리에만 선택적으로 일어났다. (±)-6a, 7-Dihydro-1-hydroxy-6, 6-dimethyl-3-pentyl-6H-dibenzo [b, d]pyran-9(8H)-one has been chlorinated in the aromatic ring with metal halide in the presence of 18-crown-6 on oxidation with m-chloroperbenzoic acid. This reagent system effects the regiospecific chlorination of activated aromatic ring over olefinic double bond.