• Journal of Sericultural and Entomological Science
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• v.36 no.1
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• pp.44-52
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• 1994

Degumming with enzyme Degummase can be a viable alternative to the existing methods of degumming. Degumming, carried out with the conventional method of Marseille's soap 25%(owf) for 1.5h at boil gives a weight loss of about 24%. On Comparison, degumming with 10 enzyme at 5$0^{\circ}C$ for 60 min gives a weight loss of about 22%. Treatment with enzyme requires a much lower temperature and also the treatment time is shorter than the conventional process. Processing of silk at these conditions is likely to retain the lustre and softness of silk. To economise on the quantity of enzyme, conditions were optimised for a pad-store process. An enzyme concentration of 0.5% at 5$0^{\circ}C$ for a time period of 5~6h resulted in a weight loss of 22%. Though the concentration of the enzyme used was 20 times less than that used for long liquor method there was some strength loss. At 5$0^{\circ}C$ treatments carried out for 7~8 h resulted in some degradation. Strength loss occurs because enzyme in the absence of any stirring keeps acting at the place where it is deposited. Effect of temperature was more pronounced than time in degrading silk.

• Journal of Sericultural and Entomological Science
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• v.26 no.2
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• pp.16-25
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• 1984

The sericin fixation of silk fabrics by epoxy resins was studied in the presence of aqueous salt solution in different solvents at the indicated temperature for the desired time. Heavy weight gains were obtained in the reaction with glycerol diglycidyl ether (EX-313) and ethylene glycol diglycidyl ether (EX-810) catalyzed by potassium thiocyanate in such solvents as carbon tetrachloride and p-chloroethylene. The obtained results were summarized as follows; 1) The tested resins were found similar in reaction behavior to silk fabric. The effect of fixation and weight gains was higher in EX-810 than EX-313. 2) The weight gains were increased with reaction time and temperature, and degumming ratio reached a constant value in 90 min at 70$^{\circ}C$. 3) The weight gains and the degumming ratio reached an equilibrium at 3-5% of epoxy concentration. 4) The weight gains were remarkably influenced and increased by the concentration of salt solution. The degumming ratio reached an equilibrium over 0.5N concentration of salt. 5) The weight gains were increased with the dipping time in gently-sloping. The degumming ratio reached an equilibrium over 15 min dipping. 6) The effect of sericin fixation of hydrophobic solvents, such as Carbon Tetrachloride, p-Chloroeth-ylene, Cyclohexane, Xylene and Toluene, was found suitable. 7) The effect of drying temperature was not remarkable on the weight gains and the degumming ratio. 8) There was a slight decrease in the moisture regain of sericin-fixed silk and it may be possible to maintain the moisture regain in the sericin-fixed silk by the epoxy resins. 9) The results on testing physical properties of sericin-fixed silk fabric were as follows; The crease recovery was almost not different from undegummed fabric, but inferior to degummed fabric. The tensile strength was improving in accordance with the effect of sericin fixation, either the elongation did.

• 한국도서관연감
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• no.2005
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• pp.119-220
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• 2005

• 한국도서관연감
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• no.2004
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• pp.109-183
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• 2004

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.20 no.3
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• pp.13-31
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• 2009

The major indicating data of academic, public, and school libraries which were mentioned in the Korea library yearbook 1998 through 2007 were collected for this study. The results were analyzed and the methods that may be applied to a library management were presented in this paper. The collected data were analyzed by using the MS-excel and SPSS. The numbers of libraries, personnels, collections and their used ones, users, management budget were used for the variables of this study, and the correlation coefficients and non-parametric method etc. were used for the variable analysis. The results show that public and school libraries are growing consistently, but academic ones get stagnant currently.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.5
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• pp.93-98
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• 2017

The fixing behaviors of raw silk yarns treated with melamine and formaldehyde at a molar ratio of 1:3 for trimethylolmelamine were investigated. Sericin was fixed during the fixing process, but a part of sericin I was removed simultaneously by hot water. The weight losses by fixing and the degumming losses by degumming greatly decreased with increasing concentrations of melamine and formaldehyde. The silk yarns fixed with 0.011 M melamine and 0.033M formaldehyde were significantly degummed due to the insufficient fixation of sericin and the alkaline hydrolysis of sericin by sodium carbonate during the degumming process. On the other hand, the silk yarns fixed with 0.055M melamine and 0.165M formaldehyde were degummed slightly (the degumming losses of 3-8%) due to the strong fixation of sericin, which might result from the many cross-linkages between the sericin I molecules, which were formed by trimethylolmelamine. Those fixed with the fixing solution containing 15% owf softener showed the lowest weight and degumming losses because under the condition of 15% owf softener, the cation of the softener can effectively form ionic bonds with the negatively charged side chain of aspartic acid in sericin. In addition, van der Waals' forces may be also formed between the hydrophobic tail of the softener and the hydrophobic region of sericin, which may help inhibit the removal of sericin I.

• The Korean Journal of Applied Statistics
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• v.30 no.4
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• pp.603-613
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• 2017

Many people have recently posted about personal interests on social media. The development of the Internet and computer technology has enabled the storage of digital forms of documents that has resulted in an explosion of the amount of textual data generated; subsequently there is an increased demand for technology to create valuable information from a large number of documents. A text mining technique is often used since text-based data is mostly composed of unstructured forms that are not suitable for the application of statistical analysis or data mining techniques. This study analyzed the Meteorological Yearbook data of the Korea Meteorological Administration (KMA) with a text mining technique. First, a term dictionary was constructed through preprocessing and a term-document matrix was generated. This term dictionary was then used to calculate the annual frequency of term, and observe the change in relative frequency for frequently appearing words. We also used regression analysis to identify terms with increasing and decreasing trends. We analyzed the trends in the Meteorological Yearbook of the KMA and analyzed trends of weather related news, weather status, and status of work trends that the KMA focused on. This study is to provide useful information that can help analyze and improve the meteorological services and reflect meteorological policy.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2003.04a
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• pp.191-194
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• 2003

인삼은 2000년 말 현재 재배농가 23,011호, 재배면적 12,445ha, 생산액 3,728억원(전체 농업생산액의 1.8%), 수출액 7,900만 달러(전체 농산물 수출금액의 약 7%)를 차지하고 있는 주요 작물이며, 우리나라 농가 경제에 기여할 수 있는 유망 종목으로써 발전의 잠재력은 매우 크다(농협연감, 2001). (중략)

• 전기의세계
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• v.45 no.10
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• pp.32-40
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• 1996

본 글은 전기학회 창립 50주년을 맞아 현재의 전력공학의 현 주소는 어디인지를 알아보고 과거 수년간의 급변하는 역사속에서 변화상을 살펴봄으로써 앞으로의 진로에 대한 방향을 얻기 위하여 쓰여졌다. 본 글을 준비함에 있어 다음에 설명할 설문지를 47개의 대학 전력공학 담당 교수에게 보냈고 돌아온 응답 37개를 바탕으로 통계를 작성하였다. 그리고 교육통계연감과 미국의 IEEE에서 작성한 미국과 캐나다의 전력 공학의 상황에 대한 논문도 사용하여 비교 자료로 활용하였다. 본 글에서의 전력공학에 대한 정의는 전력계통과 전력 전자 등을 포함하는 광의의 해석에 의한 분류가 아니라 전통적인 전력공학 즉, 전력계통과 해석, 발송배전, 제어, 기기등의 협의의 정의에 의한 전력 교육 분야를 나타낸다.

• The Korean Publising Journal, Monthly
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• s.253
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• pp.12-12
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• 1999

90년대 문학출판의 지형도를 한마디로 표현하자면, 백가쟁명의 시대였다고 할 수 있다. 70-80년대 삼각구도로 문학출판을 이끌던 창작과비평사, 문학과지성사, 민음사의 영향력 사이를 비집고 신흥 문학출판사들이 급속한 성장세를 보였다. 이는 계간지 숫자를 통해서도 알 수 있다. 98년도 "문예연감"에 따르면 현재 문예지의 종수는 모두 161종인데, 90년 들어 창간한 잡지만 90종으로 전체의 반이 넘는다. 물론 부침이 심한 잡지의 속성을 감안해야 하지만, 90년대에 다양한 문학적 발언들이 나왔다는 반증이 된다.