• Journal of Sericultural and Entomological Science
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• v.31 no.1
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• pp.25-36
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• 1989

In this experiment, gene action were analyzed for seven silkworm varieties in order to obtain basic information on their genetic improvement by diallel crosses. The results obtained were summarized as follows : In F1 generation, over-dominance was shown by Vr-Wr graphic analysis in four characters such as cocoon length in female, bave weight, cocoon weight and boiling off ratio in both male and female, and partial dominance in four characters such as fifth instar period, cocoon layer weight, cocoon layer ratio and bave length. In F2 generation, the partial dominance in all characters were obtained. Components of genetic variance analyzed for five characters such as fifth instar period, cocoon width, cocoon layer weight, cocoon layer ratio and fibroin contents in F1 generation, and for four characters such as cocoon width, cocoon layer weight, cocoon layer ratio and frbroin contents in F2 generation showed that addition effects were higher than dominant effects.

• Journal of Sericultural and Entomological Science
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• v.36 no.1
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• pp.37-43
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• 1994

The effects of some sodium phosphates as auxiliary agents were studied on the blockade of hardness for silk degumming. In this work, four kinds of sodium phosphates were tested and the results were obtained through masking effects of metallic ions, difference of pH value and boil-off ratio. The degumming of calcium ingredient was analyzed by means of atomic absorption spectrophotometer and degumming test of cocoon shell was performed in the presence of calcium ingredient and sodium phosphates added to soap solution. In the view of the effects of sodium phosphates on calcium hardness, tetrasodium pyrophosphate(TSPP) and sodium phosphate dibasic(SPD) masked calcium ions more than sodium phosphate monobasic(SPM) and sodium hexametaphosphate(SHP). SHP and TSPP have excellent abilities of masking ferrous ions. The pH values of TSPP solution is higher than others, but lower than soap solution. The pH values were differently measured one another among the sodium phosphates but the boil-off ratio was increased in case of sodium phosphate with high pH value.

• Journal of Sericultural and Entomological Science
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• v.36 no.1
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• pp.53-57
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• 1994

The weight loss for the mixture (spun silk/PET) was tested to investigate the effects of weight loss accelerator on the degumming and weight loss. The degumming loss of spun silk was decreased while the wigth loss of polyester(PET) was increased depending on the increased of weight loss accelerator concentration. The proper degumming of spun silk was obtained and simultaneously the weight loss of PET was high for the spun silk/PET "A" and "B" type. The proper degumming of spun silk was obtained but the weight of PET was loss for the spun silk/PET "D" and "E" type. The degumming curve in spun silk part was showed the typical degumming curve but the weight loss of PET was increased depending on the increased of treatment time in the weight loss for the fabric composed of spun silk/PET.or the fabric composed of spun silk/PET.

• Journal of the Korean Data and Information Science Society
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• v.21 no.6
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• pp.1081-1090
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• 2010

Most nations including Korean government make a great endeavor to realize low-carbon and green-growth world. We also work hard to expand bicycle facilities and bicycle road in order to increase bicycle transportation rate. Nowadays number of cyclists is increasing but fortunately, bicycle accidents also increase rapidly. Most data of bicycle accidents published by National Police Agency annually are represented as frequencies in two dimensional contingency tables. In this work, risk rates and characteristics of bicycle accidents are analyzed by using concepts of the probability and conditional probability. Especially with numbers of estimated cyclists and registered cars, risk rates of various kinds of bicycle accidents are obtained. Under the assumption of the conditional independence, probability of bicycle accident occurred at realistic situations could be estimated. Furthermore we discuss to reduce bicycle accidents with these results obtained in this work.

• Journal of Digital Convergence
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• v.17 no.12
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• pp.129-137
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• 2019

The purpose of this study is to analyze the efficiency of budget utilization of science and technology by the Chinese autonomous province and to present the direction of improvement. Data were obtained from the 2013-2017 statistical yearbook of higher education published by the Ministry of Education of China, and efficiency was analyzed using the malmquist analysis method. The analysis found that the low technological progress caused changes in the productivity MPI index, and that cities affected by technological efficiency needed to improve internal factors such as internal coordination and restructuring of universities in the region to increase efficiency. And it was found that areas affected by technological change needed proper response to external factors such as government policy, economic environment, social environment or technological development. This study is meaningful in that it presented reference data in enhancing efficiency of budget utilization of science and technology by autonomy of China, and it is necessary to establish strategies and study essential factors to increase efficiency of inefficient areas in the future.

• Journal of Information Management
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• v.39 no.2
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• pp.163-184
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• 2008

This research provides an empirical analysis of the academic libraries' operating performance in Seoul, Korea. This study aims to find the key variables and the impacts of each variables on the operating performance of the academic library to attain competitiveness and long-term conditions for enhancing customer satisfaction. Specifically, this research focuses on the library's circulation service performance. The author try to analyze the relationship between the characteristics of the library (space, number of employees, number of books, budget) and the circulation performance. Korea Libraries Association have published yearly-book on the Korean library's circumstances and statistics. Yearly-book contains the data about the spaces, number of books, number of workers, the library's budget scales and other unique elements. This study finds that the circulation performance of books is positively related with the size of physical space, number of books holdings, and budgets (hypothesis 1, 3 and 4 accepted). This study demonstrate that the characteristic elements of academic library can be influential factor of the library performance.

• Journal of the Korean Society for information Management
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• v.26 no.1
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• pp.57-80
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• 2009

The numbers of population, areas, possessions, employees, operational budget, users, and circulated books in Korea Library Yearbook were collected for the purpose of analyzing the status of information disparity through libraries among four large regional groups in Korea in this paper. They were the main indicators of four types of libraries such as public, academic, special, and school ones. The collected data were classified into four regional groups, and were analyzed by using the comparisons of means such as t-test and ANOVA, and correlation coefficient if there is any significant differences among them or not.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.34 no.2
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• pp.26-35
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• 2006

Design parameters of manned and unmanned rotorcrafts have been investigated to construct a design database and to derive trend curves. Design parameters of 78 manned rotorcrafts and 33 unmanned rotorcrafts have been collected and analyzed using linear regression method. Six kinds of trend curves equations are derived. Most of trend curves derived are relatively meaningful according to the calculated correlation and determination coefficients. The comparisons between manned and unmanned rotorcraft characteristics are performed. It has been drawn according to the comparisons that unmanned rotorcraft has smaller main rotor diameter and maximum take-off weight, bigger tail rotor size and similar level of empty weight fraction than manned rotorcraft.

• Journal of Sericultural and Entomological Science
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• v.43 no.2
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• pp.109-115
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• 2001

Silk sericin protein was extracted by treatment with enzyme or NaOH solution from raw silk and culled-cocoon shell. The extracted sericin was characterized and examined the functional properties as well as subjective properties for its use as a soap and a body cleaner. The optimum extraction conditions on specimen are NaOH (0.02 wt.%) or enzyme, Flavourzyme 3% under N2 gas. Molecular weights of sericin was decreased by treatment with enzyme, Actinase, from 10,000-30,000 to 2,700-4,200. Sericin showed important bioactive properties, for instance, lowering effect on blood glucose and alcohol. Subjective test of sericin soap and body cleaner showed superior in washability, foamability, and skin hydration, etc., to commercial soap and body cleaner. Therefore, it is thought that silk sericin can be expected as the source of bioactive and skin-compatible materials.

• Journal of Korean Society of Archives and Records Management
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• v.19 no.2
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• pp.77-107
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• 2019

This study aims to analyze the current state of the operation of the information disclosure system in the judiciary of Korea to identify problems and suggest ways to provide more effective and substantive requests for information disclosure in the future. To this end, we reviewed the court's information disclosure claims process from 2007 to 2017 using the data published in the judicial yearbook and the data charged to the court information disclosure system of Korea. Results showed the different processes according to the person in charge, the high withdrawal rate, the complaint response rate, and the trend of the information nonexistence as the common problems. To solve these issues, we proposed to improve the various claims system, strengthen the education of the information disclosure claimant, publish the manual, and expand the provision and original text of information in advance.