• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.48 no.3
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• pp.23-29
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• 2016

Effects of cationic polyvinylamine (PVAm) dry strength agent on effectiveness of optical brightening agent (OBA) during fine papermaking and the mechanism for brightness reduction of paper by PVAm was investigated by UV/Vis spectroscopy and turbidity measurement of OBA solution with PVAm. It was shown that PVAm reduced brightness of paper while opacity was not varied and tensile strength of paper was increased. Tetra-type OBA solution showed the peaks around the wavelength of 280 nm and 330 nm and the increase in the OBA concentration increased the UV absorbance in all wavelength. Addition of PVAm into the OBA solution decreased the UV absorbance at 280 nm. Turbidities of OBA and PVAm solutions were close to zero, respectively, while the turbidity value increased for the mixed solution of OBA and PVAm in various mixing ratios and the highest value was obtained when the mixing ratio of PVAm and OBA was 5:5, meaning that cationic PVAm formed complex with anionic OBA. In conclusion, cationic PVAm could form a complex with anionic OBA and that reduced UV absorbance, resulting in the reduced brightness of paper.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.10 no.16
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• pp.183-195
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• 1987

The effectiveness of quality control is contingent to adaptability to the present circumstance. The objectives of this study are to provide empirical data to carry out qualify control effectively. To accomplish this purpose, an empirical study was made by questionaire (mailing survey method, Feb. to Mar. in 1987). The sample is the 167 companies in Korean manufacturing industry. The main findings out of the analysis are as follows the stage of quality control is concentrated in appraisal phase, the company standard is equiped gradually in non-KS marked company and the need of economic evaluation about quality control is increased gradually. With a view to analysing of relationship between quality control and it's effect factors (company standard, KS mark, computer based information system), the methods of $\chi$$^2$ test are used. The company standard have a significant difference in top manager's altitude to duality control, operation stage of quality control. operation scope of qualify control and quality budgeting system but is insignificant with economic evaluation about duality control. Otherwise, KS mark is insignificant with the equality control activity except for operation scope. The quality information system based in computer have a significant difference in operation stage, operation scope and economic evaluation. Therefor, for the purpose of attaining effectiveness of quality control through the economic evaluation about quality control, the company standard and computer based duality information system must be utilized in quality control activity.

• Journal of Korea Society of Digital Industry and Information Management
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• v.17 no.1
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• pp.75-84
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• 2021

For analyzing big data, the social network is increasingly being utilized through relational data, which means the connection characteristics between entities such as people and objects. When the relational data does not exist directly, a social network can be configured by calculating relational data such as attribute similarity from attribute data of entities and using it as links. In this paper, the composition method of the social network using the attribute similarity between entities as a connection relationship, and the clustering method using subgroups for the configured social network are suggested, and the clustering effectiveness of the clustering results is evaluated. The analysis results can vary depending on the type and characteristics of the data to be analyzed, the type of attribute similarity selected, and the criterion value. In addition, the clustering effectiveness may not be consistent depending on the its evaluation method. Therefore, selections and experiments are necessary for better analysis results. Since the analysis results may be different depending on the type and characteristics of the analysis target, options for clustering, etc., there is a limitation. In addition, for performance evaluation of clustering, a study is needed to compare the method of this paper with the conventional method such as k-means.

• The Research Journal of the Costume Culture
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• v.24 no.2
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• pp.150-165
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• 2016

With signs of the redevelopment of the domestic sewing industry, national support agencies were established. This study aims to assess the present conditions of the domestic sewing industry and investigate the effectiveness of national sewing industry support policies. According to the results of a survey of 30 sewing companies managers, the biggest factor causing product defects was work being rushed because of tight delivery dates, and the reduction in sales was caused by a lack of orders. Moreover, sewing technicians are aging, and the biggest reason for their decrease in number is that people do not pursue the job because of the common understanding that it is difficult. Managers perceived that the government's sewing technician training program was not a practical help. They were well aware of the support program to improve the work environment and the sewing equipment support program and showed high satisfaction with these programs, but they complained that the period for equipment rental was fixed. A majority of them thought that the Korean sewing industry environment had still not improved, and were skeptical about its future outlook. They identified its most urgent needs as the expansion of orders and the securing of manpower. The support programs that they wanted urgently included support for employees' four major public insurances and the enactment of the increase of toll processing fees.

• Journal of the Korea Safety Management & Science
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• v.13 no.3
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• pp.115-121
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• 2011

Incheon Port has many advantages for import of log and timber for furniture. More than 50% of lumber which was imported is through Incheon Port. However, most companies move and set up their business by taking lease of workshop. Because of expensive cost of transportation, it is suggested to construct a lumber Industrial district in the North Port in Incheon. By researching the national plans about the North Port and Incheon Ports, an adequate acquaintance of lumber industry in Incheon has been realized. ills study conducted the economic effect analysis for lumber industry clustering and the necessity of cluster composition is derived. Then effectiveness analysis for lumber industry cluster composition is sequentially operated.

• IE interfaces
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• v.6 no.2
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• pp.103-115
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• 1993

In dies manufacturing industry, quality, cost, and production leadtime are very important. In this study, we describe the current status and characteristics of dies industry in Korea. AS a case study, we introduce a CIM system implemented in a leading dies manufacturer and describe its components and functions. Subsequently, we analyze the effectiveness of the CIM system by using the real data between 1987 and 1992 from the company. It is indicated that the most significant impact of CIM is the reduced cost, followed by increased sales, reduced leadtime, and improved quality of dies. All these four variables show positive correlations with one another. However, the data indicate that the number of employees are not directly related with other variables : probably because additional personnel are required for operating new technology such as CAD/CAM and information network.

• Management & Information Systems Review
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• v.34 no.1
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• pp.191-209
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• 2015

Electronic word-of-mouth (eWOM) in social media has been recognized as one of the most influential marketing tools across various businesses. Understanding eWOM in social media is critical to reach potential global consumers easily and quickly in the hospitality industry. However, few empirical studies in hospitality attempted to evaluate the effectiveness of eWOM in social media from a global perspective. Given the competitive climate of the hospitality market, it is meaningful for hospitality marketers to evaluate the effectiveness of eWOM in social media and the influence of cultural factors to promote customers and increase profitability globally. The main purpose of this study was to examine the influence of cultural values on social media eWOM in the hospitality industry in China, Korea, and the USA. The result of this study indicates Chinese and American people engage more than Korean people when they try to purchase hospitality product and service This study particularly provided a cross-cultural study of comparison among these countries and the findings of this study are expected to provide important practical assistance for global marketing strategies in social media.

• Journal of Korean Society for Quality Management
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• v.51 no.1
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• pp.131-154
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• 2023

Purpose: The purpose of this paper is to design an integrated informatization system that can manage quality & KPI by integrating management systems in the aerospace and defense industry, and study the effect on KPI when applied to related companies. Methods: The 7 management systems required for integration in the AS&D industry were studied, and an empirical analysis was conducted for H company in South Korea for the application of e-QMS integrated informatization & KPI system based on security environment and open quality. Results: The results of this study were analyzed to have an effect on the improvement of customer satisfaction and the positive improvement of quality failure cost in the aerospace and defense industry. And it was analyzed that it works to continuously comply with ethical management and environmental laws and prevent safety accidents. Conclusion: The greatest significance of this study is that it attempted to build an e-QMS integrated system in the aerospace and defense industry. Considering that the case of integrated management system and integrated operation of KPI in related industries has not been introduced in the existing literature, the results of this study will be shared as a meaningful preceding study in the era of digital quality information. In addition, the fact that the open-quality quality innovation methodology emphasizing measurement(M), tracking(T), and connection(C) was actually applied in an AS&D company and its effectiveness was objectively proven. It is expected that it will be a good paper for follow-up research.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.14 no.4
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• pp.38-47
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• 2006

This study analyzes the expense structure of the air transport industry, based on the cost and income data of 18 major airlines, estimates the economic effectiveness of scale and conducts comparative analysis. As for the method of analysis, Translog cost function and the Fourier flexible function were used. The result showed that big companies had the economy of scale based on the Translog cost function, while the Fourier flexible function led to a estimation that expanding the input is not recommended, for the expansion of scale entails the poor economy of scale. It can be presumed that the economy of scale was estimated according to the U shape of the Translog cost function in the given data. On the other hand, the Fourier flexible cost function approaches the unknown function, as it is a Fourier series, and correctly infers the economy of scale based on the analyzed data. As for the flag carrier's economy of scale, it was inferred that the economy of scale existed by any of two functions. Therefore, the conclusion was that further expanding the scale will not cause any problem.

• Fashion & Textile Research Journal
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• v.3 no.1
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• pp.70-80
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• 2001

This study was designed to investigate actual conditions of textile design education at technical high school in Korea, and to present possible solutions for improving its effectiveness. Inchon Girl's Polytechnic high School was selected as sample of case study because it was the only school which has textile design major. Survey was done through questionnaire and telephone interview. 100 students, 25 graduates, 8 teachers, and 8 managers of textile industry were involved in survey. The data were analyzed by using frequency, t-test, correlation. Statistical analysis resulted in the following suggestions to be considered for maximizing the effectiveness of the textile design education at technical high schools: First, the curriculum should be flexibly reorganized to come up with trends in the market and demands from industry, and also to stimulate and motivate students into the biggest achievements possible. Second, more weight should be given to practical design subjects which have proved to be preferred by students and industry by reducing class hours for non-design subjects or theoretical subjects. Third, equipments and facilities for practical exercise should be open to students anytime needed so that students can improve their practical skills without any restrictions. Fourth, new teachers having majored in textile design at the university should be employed and the existing teachers should be periodically re-educated to keep abreast with new knowledges and technology. Fifth, The solidarity and the connection between schools and companies should be reinforced, not only to provide graduates with more chances to get a job, but also to make education at schools refreshed and updated.