• ETRI Journal
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• 제38권3호
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• pp.540-550
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• 2016

Spectral clustering is a powerful tool for exploratory data analysis. Many existing spectral clustering algorithms typically measure the similarity by using a Gaussian kernel function or an undirected k-nearest neighbor (kNN) graph, which cannot reveal the real clusters when the data are not well separated. In this paper, to improve the spectral clustering, we consider a robust similarity measure based on the shared nearest neighbors in a directed kNN graph. We propose two novel algorithms for spectral clustering: one based on the number of shared nearest neighbors, and one based on their closeness. The proposed algorithms are able to explore the underlying similarity relationships between data points, and are robust to datasets that are not well separated. Moreover, the proposed algorithms have only one parameter, k. We evaluated the proposed algorithms using synthetic and real-world datasets. The experimental results demonstrate that the proposed algorithms not only achieve a good level of performance, they also outperform the traditional spectral clustering algorithms.

• 한국도서관정보학회지
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• 제54권1호
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• pp.191-220
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• 2023

이 연구는 특정 온라인 커뮤니티 회원들이 어떤 사회적 정보행동을 통해 성공적인 집단행동을 이루어 가는지 탐구하고자 하였다. 세월호 비극에 대한 대답으로서, MissyUSA 회원들은 커뮤니티를 통해 빠르게 정보를 공유하고 자원을 동원함으로써, NYT 광고 캠페인을 성공으로 이끌었다. 이전 연구의 후속연구인 이 연구는 이차분석을 통해 이전 연구에서 밝혀진 다양한 정보행동 사이의 관계를 파악하고자 하였다. 탐색적 요인분석을 통해 19개의 정보행동들은 8가지 요인으로 범주화되었다. 집단적 정체성 확인과 자원동원과 같은 2가지 요인은 전통적인 정치학에서 강조하는 요인이자 이전 연구에서 밝혀진 결과와 상통함을 보여준다. 협력적 의사결정, 긴장의 처리, 브레인스토밍 등 3가지 요인은 온라인상에서 집단행동에 나서는 이용자들에게 물리적 조직이나 대면 의사소통 없이도 의사소통과 자원동원을 극대화하는데 중요한 요인으로 나타났다. 분노의 표출, 보이콧, 계획 등 새롭게 보고된 3가지 요인은 커뮤니티 회원들이 분노의 감정을 어떻게 사용하고 참고적 정보를 활용하여 보이콧 행동에 나서는지, 후속 집단행동을 어떻게 계획하고 준비하는지를 보여주었다. 본 연구는 탐색적 요인 분석 기법을 통해 이전 연구 결과를 입증하고 협력적 정보행동과 관련한 새로운 요인들을 발견함으로써 이전 연구 결과를 확장하였다는 점에 의의가 있다.

• 한국IT서비스학회지
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• 제12권4호
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• pp.109-124
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• 2013

Recently domestic companies have struggled to deal with different kinds of crisis accrued from various sources. However, their perception on the crisis and crisis management system are extremely vulnerable. In particular, although almost all companies have had many business related crisis, they have tended to ignore the crisis with simply considering it as unlucky and not to approach it provocatively in preparing some preventive measures and turning it into an opportunity due to the lack of recognizing the importance of risk management. In other words, domestic companies have not systematically prepared detailed plans for potential crisis, rather have tended to recognize the importance of having crisis management system after experiencing a detrimental crisis or accident. Furthermore research on the issue has conducted sparsely in the academic world. The purpose of this study was to investigate the differences among types of businesses in terms of the degree of crisis experienced previously, the perception on the importance of crisis management system, the level of crisis management implementation, and the areas of crisis management being focused in the future. Usable data was collected from 201 companies using an on-site survey. Data was analyzed with SPSS 21.0 using some descriptive statistics and a series of ANOVA (One-way Analysis of Variance). Results and implications were provided, along with some future research directions.

• Asian Journal of Business Environment
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• 제6권4호
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• pp.19-26
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• 2016

Purpose - The purpose of this paper is to elicit antecedents that influence the buying of counterfeit products in Raipur, an emerging capital city. Research Design, Data, and Methodology - 203 responses to the questionnaire were collected to come out with the results of the study. From the exploratory study, 20 variables were identified to have an influence on the buying of counterfeit products. Factor analysis was applied on the data collected and these items were grouped into four factors. Result - The findings suggest that safety implications have a significant impact on the buying of counterfeits in an emerging city - Raipur, India. Further studies that are specific to geographical locations could be carried out to validate the findings of this paper as the tastes and preferences of each of the markets are unique. Conclusions - For manufacturers, marketers and law enforcers it might be of great interest to learn that safety concerns are uppermost on the minds of people who deliberately or inadvertently consume counterfeits. If it can be conveyed effectively that consumption of counterfeits can cause more harm than increase in perceived value, it can be checked to a good extent.

• 한국의류학회지
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• 제31권4호
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• pp.519-530
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• 2007

This study is an exploratory research on the brand architecture of Korean apparel enterprises and the differentiation strategy among in-house competing brands. For data analysis, secondary data was used. 20 apparel enterprises were used as the subjects. The results are as following. First, as a result of brand architecture composition, apparel enterprises used the strategy that initially paved the way launching several brands in a specific item category and after that diversified to other categories. Most enterprises used the multi-brand strategy operating plural brands in a same zoning. The terms for launching succeeding brands were about $1{\sim}5$ years. Second, as a result of analysing the cases which several brands competes within a same zoning, all the posterior brands had some differences from the prior ones. The most frequent differentiation factor was price. Concept, target age, and distribution channel followed. The order of the factors was somewhat different among the item categories. The differentiation strategy among in-house competing brands meant that the enterprises manage plural brands in a same zoning for the growth of whole market share instead of the direct competition among in-house brands. The results of this study can suggest a growth direction to the enterprises planning to launch new brands.

• 융합경영연구
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• 제7권3호
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• pp.13-28
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• 2019

Purpose - The purpose of this study is to analyze the start-up factors in start-up tourism companies and to analyze how these factors influence business performance. This study will be conducted for the further exploratory study with in-depth research with literature reviews, interviews and surveys. Research design, data, and Methodology - The activation of entrepreneurship is very important factor as for not only the development of entrepreneurship which is the characteristic of the innovative and risks-taking for the success of the enterprise, but also the sustainable growth and creation of performance of the entrepreneur. In other words, if it is the entrepreneurial spirit affects entrepreneurship, it is entrepreneurial orientation that continuously affects entrepreneurs. In order to achieve the above purposes, this study conducted literature research and empirical studies. Result & Conclusions - The sub-factors for independent entrepreneurial variables' orientation are classified as creativity, technological, enterprising, and innovation, and subordinate variables were set of management performance. The sub-factors of the control variable government support policy are classified as financial support, consulting support, and marketing support. For the purpose of empirical analysis, this paper collects data on companies selected for tourism venture business competition and CEOs of SMEs tourism for less than 7 years.

• Journal of Preventive Medicine and Public Health
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• 제29권2호
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• pp.255-264
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• 1996

정상적으로 일상생활을 영위하는 사람들을 대상으로 스트레스 수준을 가늠하고, 스트레스에 대한 조정기전을 밝히고자 하는 목적으로 개발된 사회 심리적 건강 측정 도구(PWI)의 신뢰도 및 타당도를 평가하기 위하여, 의과 대학생을 대상으로 4주간격으로 두 차례의 설문 조사를 실시하였다. 내적 일치도를 나타내는 Crohnbach's $\alpha$계수가 0.93의 값을 보였다. 4주의 간격을 둔 검사-재검사 신뢰도는 1차조사의 성적과 2차조사의 성적 사이 Pearson상관계 수가 0.72의 값을 보였다. 탐색적 인자 분석을 통해 고유값 1이상의 인자는 13개였다. 인자의 수를 4개로 지정하여 주축인자법과 직교 회전법으로 분석하여 인자 구조를 비교한 결과 첫번째 인자는 거의 일치하였으나, 3번째와 4번째 인자는 거의 일치하지 않았다. 확증적 인자분석을 통해 선행 연구의 4인자 모형과 이 연구의 탐색적 분석 결과에 나타난 4인자 모형의 적합도를 구한 결과 RMR값이 0.1미만인 것을 제외하고는 모든 적합도 지수가 부적합하게 나왔다 각 인자를 측정 변수로 간주하고 그 하부에 이론 변수로서 단일 인자가 존재하는 것으로 구성한 일차원적 단일 인자 모형에 대한 적합도는, 비록 이 모형이 오차 항의 상관성을 지닌 것이긴 하나 적합한 지수를 많이 보여, PWI가 2차원적 측정 구조를 가졌을 가능성을 제시하였다.

• 한국의류학회지
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• 제33권7호
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• pp.1050-1060
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• 2009

This study develops a scale for consumer clothing satisfaction based on Lee et al. 's (2002) five stages of the consumer life cycle (acquisition, possession, consumption, maintenance, and disposal). Data were gathered by surveying college students using convenience sampling, and 419 questionnaires were used in the statistical analysis. In analyzing the data, an exploratory factor analysis and a confirmatory factor analysis using a structural equation modeling were conducted. The proposed scale, which identified various sources of satisfaction and dissatisfaction associated with the 5 consumption cycles of clothing, suggests some guidelines for marketers in enhancing consumer clothing satisfaction across consumption stages. The model test for the scale also identified that consumption satisfaction had the greatest effect on consumer clothing satisfaction showing the strongest loading and squared multiple correlation.

• 대한가정학회지
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• 제47권6호
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• pp.51-66
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• 2009

The purpose of this study was to develop a model for preschool children's self regulation by examining the effects of maternal parenting variables on preschool children's self regulation. The subjects were 1219 mothers of 4- to 6-year-old preschool children attending kindergarten or child care centers located in Seoul and Kyunggi Province, Korea. For data analysis, exploratory factor analysis(EFA) and confirmatory factor analysis(CFA) were applied to the survey data in the first phase and structural equation modeling(SEM) analysis in the second phase. The major results of this study were as follows: maternal parenting stress and maternal behavior were the most direct influential variables on preschool children's self-regulation. Moreover, maternal parenting efficacy was indirectly mediated through maternal behavior.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2019년도 제60차 하계학술대회논문집 27권2호
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• pp.407-408
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• 2019

This thesis determines the research framework and scale design of leisure food E-Commerce consumer satisfaction degree by referring to previous theoretical model of customer satisfaction degree, the universal satisfaction evaluation index system, and the characteristics of leisure food E-Commerce in China. In this research, consumers who have bought leisure food online are taken as the research object, data are collected by questionnaires, and exploratory factor method is used to screen valid sample data. Through the Empirical Analysis which includes Descriptive Statistical Analysis, Reliability and Validity Analysis and Structural Equation Modeling, it is concluded that website design, logistics delivery service, commodity quality, and after-sales service are the main service quality on which the Leisure food E-Commerce enterprises should take focus. The service quality has significant positive influences on satisfaction degree. On the other hand consumer satisfaction has a significant positive influence on customer loyalty, which will create more earnings for the Leisure food E-Commerce enterprises.