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陸鍾一 건국대학교 1979 論文集 Vol.10 No.1
In this experiment E-glass fiber was used as a specimen material to transfer higher SiO2 content and promote physical properties by acid teaching. The change of SiO2 content and melting point of the fiber were plotted with variable condition such as acid concentration, leaching time and temperature. The results obtained by-the study are as follows. 1) E-glass fiber was the best material for high glass forming, and on acid treatment, 4 NHCI was most suitable. 2) The temperature condition could vary the SiO2 content of the fiber, but it was befit to keep the temperature between 95℃ and 100℃ 3) Melting point of the high glass was almost proportional to the SiO2 content with its purity. 4) Heat treatment had no effect on the SiO2 content.
산용해법에 의한 유리섬유의 실리콘디옥사이드 변동에 관한 영향
육종일,지동선 한국섬유공학회 1988 한국섬유공학회지 Vol.25 No.5
Environmental factors affecting the SiO2 content change of glass fiber caused by the acid solution method were experimented and investigated, and the following results were obtained by analyzing the kinds of acid, concentration, treating time and temperature. 1. In the acid treatment, plain weave showed the maximum value, 97% of SiO2 content in conditions where HC1 concentration was 3N, treating time 95 minutes and treating temperature was 9$0^{\circ}C$, while 5-H satin showed the maximum value, 96% of SiO2 content where HC1 concentration was 3N, treating time 90 minutes and treating temperature was 8$0^{\circ}C$. 2. Respectively 1% increment of SiO2 content was shown for both cases in which plain weave was water-cleansed for 15 minutes in hot water of 7$0^{\circ}C$, following the acid treatment and 5-H satin for 17 minutes. 3. 1 or 2% of A12O3 is remained after water-cleansing, because ionic bonding is lagrer than that of other metallic oxide compounds and so perfect ionization is impossible. 4. Fiber structure was the most stable when it was heat-treated at 80$0^{\circ}C$ for 60 minutes.
페놀 수지를 매트릭스로한 무기섬유 복합재료의 융삭 현상
육종일,모상영 한국섬유공학회 1987 한국섬유공학회지 Vol.24 No.5
In order to define the ablation phenomena of the inorganic fiber reinforced ablative materials, the chop type specimen and the laminate one of phenol resin matrix composites have been reinforced with carbon, silica and glass fiber, respectively, were made and examined by the oxy- acetylene torch testing method for 110 seconds. The ablation phenomena, the microstructural change by the internal stress were studied. And both the backface temperature and the weight decrease were measured with the ablation time. Results obtained are as follows. Char layer of the ablative materials is being grown by the repeated actions of melting, decomposing and vaporizing and it is porous at surface region but dense inner the surface one. The deposition of carbon originated from the decomposition of vaporized gases was occured at the surface and resulted in formation of hard layer. Back face temperature of the ablative materials was ordered as follows, carbon-phenolic>glass-phenolic>silica-phenolic. Though the back face temperature of the laminate type was higer than that of the chop type, the thermal resistance of the laminate type is thought to be superior to that of the chop type as materials for high temperature ablation.
시장세분화변수를 통한 프로야구 관중의 참여결정요인 분석
육종술(Yug Jong Sul) 한국사회체육학회 2003 한국사회체육학회지 Vol.20 No.1
The purpose of this study is to present marketing mix that affect attendance at professional baseball in korea. The data base comprised 546(312 man,234 woman) professional baseball spectators. In order to examine various factors affecting attendance, the questionnaires which were composed of lifestyle as psycho-graphics and consumer behavior as behavioristics was used as a measurement device. For lifestyle, the questionnaire by Youk and Jung(1995) was used on the basis of previous studies by Plumer(1975). For consumption behavior ,the questionnaire by Kang, Youk, Sohn, Kim and Jung(1998) was used on the basis of previous studies by Hansen and Gauthier.(1989), Marcurm and Greenstein(1992), Wakefield and Sloan(1995). The questionnaire consisted of 40 items to reflect lifestyle, and 14 items consumption behavior. The subjects were requested to indicate the extent of their agreement with each item on a 5-point Likert scale ranging from 1(definitely false) to 5 (definitely true).In some instance, however, the respondents did not complete all the items in the questionnaire. Consequently, the degree of freedom varied from analysis to analysis due to missing data. The internal consistency estimates(Cronbach`s alpha) were .710 for entire scale of lifestyle and .712 for "price", .627 "facility", .684 "game" in consumption. In order to statistical analysis, this study used a SPSS version 8.0 program for windows. Statistical treatment were ANOVA, multiple correlation analysis, multiple regression analysis. The result of this study, which were attained through the process, are as follows. First, there were significant difference in life style and consumption behavior according to demographic variables. Second, "facility" was influenced by "fashion", "weak", "will", "vanity", "sports", "responsibility", "brand", "health", and "price" by "self-confidence", "weak will", "vanity", "responsibility", "brand", and "game" by "fashion", "self-confidence", "weak will", "sports" "brand", "health".