• Journal of Korean Society of Industrial and Systems Engineering
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• v.46 no.2
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• pp.168-175
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• 2023

In the era of the 4th Industrial Revolution, Logistic 4.0 using data-based technologies such as IoT, Bigdata, and AI is a keystone to logistics intelligence. In particular, the AI technology such as prognostics and health management for the maintenance of logistics facilities is being in the spotlight. In order to ensure the reliability of the facilities, Time-Based Maintenance (TBM) can be performed in every certain period of time, but this causes excessive maintenance costs and has limitations in preventing sudden failures and accidents. On the other hand, the predictive maintenance using AI fault diagnosis model can do not only overcome the limitation of TBM by automatically detecting abnormalities in logistics facilities, but also offer more advantages by predicting future failures and allowing proactive measures to ensure stable and reliable system management. In order to train and predict with AI machine learning model, data needs to be collected, processed, and analyzed. In this study, we have develop a system that utilizes an AI detection model that can detect abnormalities of logistics rotational equipment and diagnose their fault types. In the discussion, we will explain the entire experimental processes : experimental design, data collection procedure, signal processing methods, feature analysis methods, and the model development.

• Journal of the Korea Convergence Society
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• v.8 no.10
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• pp.333-338
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• 2017

Ethnography is concerned about specifically-based behavior and belief and the learned pattern of language and aims to describe and interpret them. Therefore, it is a classical form of qualitative research that was developed by anthropologists who spent for long time in conducting fieldworks within the cultural group. The results of analyzing ethnographic research methods of doctoral dissertations in Korea are as follows. First, the number of research participants in data collection methods was 1-10(32 dissertations, 44.4%), 11-20(18, 25%), 21-30(13, 18.1%), 31-40(2, 2.7%), and others(7, 9.8%). Second, data collection methods were in-depth interview(71, 98.6%), participant observation(70, 97.2%), document data(38, 52.7%), engineering device(12, 16.6%), and others(8, 11.1%). Data collection periods were 3-5 months(7 dissertation, 9.8%), 6-8 months(15, 20.8%), 9-11 months(14, 19.6%), 12-14 months(13, 18.1%), more than 15 months(17, 23.6%), and unpresented(4, 5.4%). Third, trustworthiness criteria were triangulation(46 dissertation, 63.9%), research participants' evaluation of study results 44(61.1%), peer researchers' advice and indication(33, 45.8%), follow-up(25, 34.7%), use of reference(20, 27.8%), reflexive subjectivity(17, 23.6%), intensive observation for a sufficient period(10, 13.9%), in-depth description(7, 9.8%), and others(7, 9.8%).

• Fashion & Textile Research Journal
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• v.3 no.5
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• pp.444-454
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• 2001

The purpose of this paper was to identify and compare the underlying design theory of contemporary European and Japanese fashion designers by using the qualitative research method of grounded theory developed by Glaser and Strauss (1967) and Glaser (1978). In this research, four fashion sites-Paris, Milan, London and Tokyo-were selected. The researcher stayed in each site for a period of two to three weeks for the purpose of data collection. A total of 60 fashion designers, educators, students and journalists were interviewed. 53 open-ended design questionnaires were returned by fashion designers and students. 19 on-site observations of fashion designers and educators were done. Grounded theories of fashion designers were synthesized from in-depth interviews, participant observations and questionnaire surveys of fashion designers, students and educators. The results of theory-building research suggested that there were significant differences between the grounded design theories of European and Japanese fashion designers due to their various cultural contexts.

• Journal of the Korean Society for Library and Information Science
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• v.48 no.2
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• pp.241-257
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• 2014

Seokssiwonryu originally published in China's Ming Dynasty was published twice in our country. While the engraved period of Bulamsa Temple version was clearly known from its obvious colophon indication, that of Seonunsa Temple version was not clearly identified with its colophon mentioning only its publishing temple. Thus, this study examined the relevant data such as Seonunsa Temple's history of its records and collection of the National Library of Korea, and as a result found a new fact that it had been engraved in 1710 not in 1649 as previously known.

• Korean Journal of Human Ecology
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• v.23 no.5
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• pp.941-955
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• 2014

A price discount is one of the effective marketing means to get business profitability in a short period of time. Recently most of the foodservice enterprises in our country utilize a variety of discount methods such as affiliated cards, point cards, discount coupons, social commerce and/or event discount as their marketing strategy. Therefore, this research aimed to investigate customer satisfaction about discount methods provided by the foodservice industry and explore the moderate effect of the discount methods between customer satisfaction and loyalty. For data collection, both of online and offline questionnaire surveys were carried out, and a total of 871 responses were analyzed. As results, the respondents showed high satisfaction with the discount methods, and the discount methods had a positive moderate effect between customer satisfaction and loyalty.

• Journal of Distribution Science
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• v.11 no.6
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• pp.13-19
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• 2013

Purpose - This study aims to predict the audit reports of listed companies on the Tehran Stock Exchange by using meta-heuristic algorithms. Research design, data, methodology - This applied research aims to predict auditors reports' using meta-heuristic methods (i.e., neural networks, the ANFIS, and a genetic algorithm). The sample includes all firms listed on the Tehran Stock Exchange. The research covers the seven years between 2005 and 2011. Results - The results show that the ANFIS model using fuzzy clustering and a least-squares back propagation algorithm has the best performance among the tested models, with an error rate of 4% for incorrect predictions and 96% for correct predictions. Conclusion - A decision tree was used with ten independent variables and one dependent variable the less important variables were removed, leaving only those variables with the greatest effect on auditor opinion (i.e., net-profit-to-sales ratio, current ratio, quick ratio, inventory turnover, collection period, and debt coverage ratio).

• Journal of Korean Public Health Nursing
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• v.27 no.1
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• pp.129-141
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• 2013

Purpose: This study examine the relationships retirement plans, perception of successful aging and attitude toward retirement nurses. Methods: The subjects of this study 200 nurses at two hospitals in C City. The data collection period from Nov. 1 to Dec. 31, 2011. Results: The degree of retirement significant according to age, marital status, education level, dependent, duration of employment, shift, department, annual salary. he degree of economic retirement plan showed significant differences according to age, marital status, education level, dependent home, duration of employment, department, annual salary. he degree of physical retirement plan showed statistically significant differences according to age, marital status, dependent, department. The degree of emotional retirement plan showed significant differences according to age, department. Conclusion: mprove the retirement of clinical nurse, we need a systematic based on physical and mental health.

• Journal of the Korean Home Economics Association
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• v.44 no.4 s.218
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• pp.159-173
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• 2006

The purpose of this study was to investigate the seating style of children between Korea and USA viewed from activity analysis in child-care centers. Observation and depth-interview method were used for data collection. Ninety-eight children aged from 38 to almost 62 months were observed for five minutes three times during an indoor free play period in Korea and USA in 2003 and 2004. The results of the research were as follows. There were significant differences between the postures of Korean and American children. Korean children maintained floor-seating postures longer than chair-seating and standing postures. The factors such as sex, age and physical environment influenced the children's seating style, while playing-type influenced their posture. This study will contribute to our understanding of the physical environment and children's seating style according to culture.

• International Commerce and Information Review
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• v.12 no.4
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• pp.127-149
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• 2010

It is well known that FTA increases consumer welfare. However, it is difficult to analyze consumer welfare effects of FTA for item by item because of the difficulty in data collection. In this respect, this study aims at analyzing the types of increasing consumer welfares with item by item. According to the result of the study, there are five types of consumer welfare increased by FTA, and the items are like below: banana, kiwi, octopus, wine, and etc. However, it is hard for consumer to feel effects of FTA directly for several reasons. The problem of distribution structure of imported goods and, tariff reductions over long period are parts of the reasons to reduce the consumer wealfare effects. And the lack of consumer awareness about imported goods also reduces them. In order to promote FTA more efficiently, this study suggests that the government must improve the problems mentioned because consumer consent is essential element for further FTA promotion.

• The Korean Journal of Rehabilitation Nursing
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• v.9 no.2
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• pp.153-160
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• 2006

Purpose: This study was performed to examine present health condition on community clients and the degree of cognition on community oriental health promotion program. Method: Research design is cross-sectional descriptive study, 300 residents who live in S city were selected. The period of data collection was from October 2005 to April 2006. The research instruments used were the VAS of fatigue, headache, pain, Depression, anxiety to examine present physical and psychological health condition and questionnaire on the degree of cognition on Oriental Health Promotion Program. SPSS 10.0 was used for statistics. Results: The range of fatigue, headache, pain, depression, anxiety was 2.09-3.75. The degree of cognition on program was 2.67. As for the degree of cognition on oriental health promotion program according to general characteristics of subject, there was significant difference(F=3.79, p=.038) between below 65 years(2.88) and above 65 years(3.12). Conclusion: We are trying to develop oriental health promotion program fit to property of community, especially elderly.