• 한국병원경영학회지
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• 제26권2호
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• pp.17-26
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• 2021

Purposes: This study aims to identify factors affecting dental university hospitals' profitability and understand recent their business condition. Methodology: Data from 2016 to 2019 was collected from financial statement, public open data in 8 dental university hospitals. For the study, multiple regression test with stepwise selection was applied. Findings: First of all, 9 out of 19 independent variables were selected by stepwise selection. As a result of multiple regression test with selected independent variables and the dependent variable(operating profit margin ratio), the factors affecting hospitals' profitability were the number of dental unit chair, hospital location, debt ratio, total capital turnover ratio, employment cost rate, material cost rate, management expense rate, the number of patient per a dentist. Practical Implication: To improve dental university hospitals' profitability, hospitals specifically analysis and manage their cost such as employment, material and management cost and seek effectiveness by managing the proper number of patient per a dentist.

• Journal of Korea Trade
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• 제26권3호
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• pp.102-116
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• 2022

Purpose - This paper empirically investigates the relationship between firm productivity and importing intermediate inputs in the Korean manufacturing sector. Design/methodology - This paper tests the two related hypotheses on the relationship between importing and productivity for a sample of Korean manufacturing firms. We test the self-selection hypothesis by comparing pre-entry levels of productivity between importers and non-importers. We test the learning-by-importing hypothesis by employing propensity score matching with differencein-differences approach. Findings - Future importers are more productive than future non-importers years before they start to import, which supports the self-selection hypothesis. In contrast, there is no strong evidence for learning-by-importing. Originality/value - This paper is the first study to explore the relationship between importing and firm-level productivity for Korean firms. The results have an important implication on trade policies to lower or raise trade barriers in imported inputs.

• 유통과학연구
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• 제14권11호
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• pp.117-128
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• 2016

Purpose - In order to collect information needed for the establishment of more effective marketing strategies of on-line purchasing agent services targeting Chinese consumers, the study investigated the relationship among Chinese selection criteria. They included fashion products, use of information source, and satisfaction with on-line purchasing agent services. The study also identified the differences in the Chinese selection criteria of fashion products, use of information source, and the satisfaction level with on-line purchasing agent services according to their age and gender. Research design, data, and methodology - The study was implemented through a normative-descriptive survey method using a self-administered questionnaire. Data were collected from February 9 to 28, 2016, and analyzed by factor analysis, ANOVA and Duncan test, t-test, and multiple regression analysis. Results - Differences were found in selection criteria of fashion products and use of information sources among groups. Thirty's age group was concerned about price/brand more than the twenty's were. Twenty's were concerned about practicality/quality of the products more than the thirty's. Hallyu/broadcasting was used by men more than by women as an information source of Korean fashion. SNS/WOM(word of mouth) was used more by women than by man. Twenty's showed lower level of satisfaction with customer services/credibility than other factors. The thirty's showed lower level of satisfaction with informational role of the service than other factors. Those who utilize each type of fashion information source more showed higher satisfaction level with on-line purchasing agent service of Korean fashion products.. In general, according to the selection criteria and use of information, there were differences in satisfaction with on-line purchasing agent service of Korean fashion products. Conclusions - Considering the findings of the study, as well as age, gender, selection criteria and use of information source, Chinese consumers could be used as a criteria of market segmentation for on-line purchasing agent services of Korean fashion products. The results manifested that there is a need to differentiate marketing strategies according to the satisfaction levels with each satisfaction factors of on-line purchasing agent service of Korean fashion products.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권1호
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• pp.240-259
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• 2020

Analyzing network traffic is the basis of dealing with network security issues. Most of the network security systems depend on the feature selection of network traffic data and the detection ability of malicious traffic in network can be improved by the correct method of feature selection. An FAFS method, which is short for Fuzzy Association Feature Selection method, is proposed in this paper for network malicious traffic detection. Association rules, which can reflect the relationship among different characteristic attributes of network traffic data, are mined by association analysis. The membership value of association rules are obtained by the calculation of fuzzy reasoning. The data features with the highest correlation intensity in network data sets are calculated by comparing the membership values in association rules. The dimension of data features are reduced and the detection ability of malicious traffic detection algorithm in network is improved by FAFS method. To verify the effect of malicious traffic feature selection by FAFS method, FAFS method is used to select data features of different dataset in this paper. Then, K-Nearest Neighbor algorithm, C4.5 Decision Tree algorithm and Naïve Bayes algorithm are used to test on the dataset above. Moreover, FAFS method is also compared with classical feature selection methods. The analysis of experimental results show that the precision and recall rate of malicious traffic detection in the network can be significantly improved by FAFS method, which provides a valuable reference for the establishment of network security system.

• The Korean Journal of Ecology
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• 제26권6호
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• pp.341-347
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• 2003

이 논문에서는 우리나라 적지적수 연구사에 관한 사료를 제시하였다. 필자는 조선시대의 임금에 대한 진상을 목적으로 한 적지적수사와 일제강점 초기의 간이적인 적지적수 연구 및 실시사례, 강점중기에 이르러서는 조선수목죽류 기후상적지도, 후기에는 속성수의 절지식재시험 및 지역별 조림수종 선발시험 등에 관한 주요 자료를 해외에서 수집 발굴하였다. 조선수목죽류 기후상적지도는 아직까지 국내에 알려지지 않은 자료로서 향후 우리나라 산지의 지원화 및 산불 피해지 복구조림, 남북통일을 대비한 북한지역 녹화사업의 기초자료로서 뿐만 아니라 고유임상 및 식생연구 등에도 유용하게 사용될 것으로 기대된다.

• 한국지역사회생활과학회지
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• 제19권4호
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• pp.497-507
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• 2008

This study investigated relationships between the importance and satisfaction of rice-based menu selection attributes at family restaurants. For data collection, a total of 250 copies of questionnaires were distributed to 4-year college students who had an experience of a rice-based menu at casual dining restaurants, and finally 221 surveys (88.4%) among them were analyzed by using SPSS Win ver. 11.5. Twenty selection attributes were used to test the level of importance and satisfaction for rice-based menu. The factor analysis identified six dimensions of the importance of rice-based menu selection attributes; variety of items, menu information, recommendation & atmosphere, food quality, preferred menu, and price. Also, five dimensions of satisfaction were identified as nutrition & taste, menu information, preferred menu & atmosphere, variety of items, and cooking. Canonical correlation analysis revealed that preferred menu factor of importance was highly correlated with preferred menu and restaurant atmosphere factor of satisfaction of rice-based menu selection. The managerial implications of these results for rice-base menu selection attributes are as follows: There seems to be a need to develop a variety of rice-based menus, because rice-based menus tend to be considered as an additional menu, not a main course. Aggressive marketing and communication strategies are necessary to position rice-based menu as a main course for college students and as a major maket segment to family restaurants.

• 수산해양기술연구
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• 제59권3호
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• pp.189-195
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• 2023

This study quantitatively evaluated size selectivity for three netting shapes (T0; regular, T45, T90) and hanging ratio (35%, 70%) of T0 netting used for trawl codend. The size selectivity experiment was performed in a tank using a cube experimental model with a length of 50 cm on one side and 389 experimental individuals, jack mackerel (Trachurus japonicus). In the selectivity analysis, a selectivity curve was created based on the selection ratio using a logistic function, and the 25%, 50%, and 70% selection length and selection range (SR) were obtained. The T0 netting was 19.54 cm when the 50% selective length, which is a selectivity evaluation index, had a hanging ratio of 35%, a selection range of 0.51 cm, and 22.70 cm and 3.08 cm for the hanging ratio of 70%. The T45 netting was 24.34 cm and 2.13 cm, and the T90 netting was 23.51 cm and 2.84 cm. The results of the T45 netting and the T90 netting are similar, and the 50% selection length and selection range were relatively larger than the T0 netting. There was a significant difference in the correlation between the circumference of the inner circle of the mesh by the shape of the netting and the body girth of the experimental individual (Pearson test, r = 0.86, p < 0.05). There was no significant difference in the correlation between the selection ratio by the T0 netting, T45 netting, and T90 netting with a 70% hanging ratio (one-way ANOVA, p > 0.05). The results of this study showed that selectivity such as T45 netting and T90 netting appeared when the hanging ratio, which maximizes the area of T0 netting, was maintained at 70%.

• 한국항해항만학회지
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• 제28권6호
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• pp.525-530
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• 2004

중국항만은 급속한 성장으로 말미암아, 최근 부산항의 경쟁력 제고에 관한 연구가 집중적으로 이루어지고 있다. 이러한 연구의 대부분은 동북아 주변항만의 경쟁력을 다양한 방식으로 분석/평가하여, 부산항의 위상을 제시하고, 경쟁력 강화를 위한 전략을 수립하는 것으로 요약된다. 그러나 이러한 연구는 학술적인 의미보다는 우리나라가 당면한 현안자체에 큰 비중을 두고 있는 연구들로서, 이와 관련한 기초연구의 필요성은 오히려 간과되고 있는 실정이다. 즉, 항만의 경쟁력을 올바르게 평가하고 분석하는 데 기초가 되는 항만선택요인에 대한 철저한 고찰은 매우 부족한 것이 현실이다. 이로 말미암아, 기존연구들은 각기 다른 요인들을 척도로 하여 항만들을 평가/분석하고 있는 실정이어서, 기존연구의 분석결과들로부터 일관성을 확보하기 곤란한 문제가 빈번히 발생하고 있다. 따라서 본 연구는 이러한 점에 주목하여, 항만의 선택 요인을 실증적으로 고찰하는 것을 연구의 목적으로 한다. 특히, 본 연구에서는 실증데이터를 분석하여 항만선택 요인을 내적요인과 외적요인으로 구분하고, 그 동안 그 중요성이 실증적으로 부각되지 않았던 외적요인에 주목하여 이러한 요인이 항만 선택에 미치는 영향력을 파악하고자 한다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2004년도 춘계학술대회 논문집
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• pp.357-362
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• 2004

중국항만의 급속한 성장으로 말미암아, 최근 부산항의 경쟁력 제고에 관한 연구가 집중적으로 이루어지고 있다. 이러한 연구의 대부분은 동북아 주변항만의 경쟁력을 다양한 방식으로 분석／평가하여, 부산항의 위상을 제시하고, 경쟁력 강화를 위한 전략을 수립하는 것으로 요약된다. 그러나 이러한 연구는 학술적인 의미보다는 우리나라가 당면한 현안자체에 큰 비중을 두고 있는 연구들로써, 이와 관련한 기초연구의 필요성은 오히려 간과되고 있는 실정이다. 즉, 항만의 경쟁력을 올바르게 평가하고 분석하는데 기초가 되는 항만선택요인에 대한 철저한 고찰은 매우 부족한 것이 현실이다. 이로 말미암아, 기존연구들은 각기 다른 요인들을 척도로 하여 항만들을 평가／분석하고 있는 실정이어서, 기존연구의 분석결과들로부터 일관성을 확보하기 곤란한 문제가 빈번히 발생하고 있다. 따라서 본 연구는 이러한 점에 주목하여, 항만의 선택 요인을 실증적으로 고찰하는 것을 연구의 목적으로 한다. 특히, 본 연구에서는 실증데이터를 분석하여 항만선택 요인을 내적요인과 외적요인으로 구분하고, 그 동안 그 중요성이 실증적으로 부각되지 않았던 외적요인에 주목하여 이러한 요인이 항만 선택에 미치는 영향력을 파악하고자 한다.

• 복식
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• 제49권
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• pp.125-136
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• 1999

The present study was conducted to analyze(1) if there are any differences in jean's brand royalty according to the age·sex·educational background and income of consumers (2) the criteria for store choice by jean's brand royalty of consumers (3) the use of information souces by jean's brand royalty of consumers. The research method employed was normative-descriptive survey and questionnaires were main instrument to gather research materials. The survey was implemented from July 1st 1998 to the schools and two colleges and those who work at a comuter-related company and at a trade company. The data gathered was analyzed by mean standard deviation t-test ANOVA and Duncan -multiple range test. The results are summarized as follows: (1) 58.6% of the respondents were categorized as the brand loyalty group that was bigger than the non-brand loyalty group (41.4%) People in their late 2-'s were inclined to have the highest brand loyalty for jeans People in university and above had relatively higher brand royalty than to people with a high school or lower (2) Brand royalty group paid more attention on the quality on the quality of the fabric use; the trands of the products: brand name of the product: the distance of the store location : and the comfortable atmosphere of the store. Pleasant and kind services of the salesperson was considered as more important factor for store selection by the non-brand royalty group than by brand royalty group. (3) Almost all the information sources were used more often by brand royalty group than non-brand royalty group. For both groups their own experiences is most important information sources. The results shows that consumers have high brand loyalty for jeans product and also have many differences not only in the usage of information sources but also in the store selection criteria accorrding to the level of jeans brand loyalty . Therefore those industries carrying jeans should these points on their marketing strategies.