• Proceedings of the Korean Operations and Management Science Society Conference
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• 2000.10a
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• pp.181-184
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• 2000

우리나라의 PC통신 고객은 그 동안 급속한 성장을 해왔으며, 향후에도 매년 40%이상의 높은 성장이 지속 될 것으로 예상을 하고 있다. 그러나 이러한 급격한 성장은 기본 인프라 부족과 서비스지원인력 부족으로 인한 고객의 기대충족 미흡, 불안정한 수익구조 등으로 인해 취약한 우리나라 PC통신의 경쟁 여건을 더욱더 악화시킨 것으로 우려되고 있다. 따라서 본 연구에서는 체계적인 선비투자와 최적의 경쟁여건 개선을 위하여 고객의 기대지표라고 할 수 있는 각 혁신변수들(구조적, 고객 지향적, 상징적)을 정의하고, 각각의 혁신활동들이 고객만족 퍼포먼스 축적에 어떤 영향을 미치고 있으며, 고객감동 성과제고와 PC통신 사업자들의 경쟁적 특성에 어떠한 영향을 미치는지 알아보았다. 각 경쟁력에 유의한 영향을 미치는 상관관계를 알아보기 위해 국내 주요 5개 PC통신사를 이용하는 통신관련 실무자를 대상으로 설문조사를 실시, 고객만족 퍼포먼스 축적을 통하여 고객감동에 이르는 경쟁력에 대한 가설검정과 측정변수와의 상관관계 분석을 통하여 고객만족 퍼포먼스 축적을 위해서 어떠한 혁신활동을 우선적으로 추진해야 하는지에 대한 대안을 제시하였다.

• Journal of the Korean Data and Information Science Society
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• v.26 no.1
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• pp.141-150
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• 2015

Graphical paradigms for assessing the adequacy of models in logistic regression are discussed. The residual plot has been widely used as a graphical tool for evaluating the adequacy of the model. However, this approach works well only for linear models with constant variance, and the alternative approach, the marginal model plot, has its defects as well. We suggest a Chi-residual plot that overcomes the potential shortcomings of the marginal model plot.

• The Journal of the Korea Contents Association
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• v.15 no.11
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• pp.422-432
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• 2015

The government provides various support systems for small-medium companies who perform a vital role for hiring and manufacturing: focusing on activating of start-up. Various governmental supports have been made and these entrepreneurship support systems have been contributed a certain point to start-up activation. Based on precedent study, this study has been setup the independent variables as five factors: mainly tax support system, financial support system, technology support system, management support system, self-employment infrastructure support program and empirically completed with the hypothesis how independent variables affect entrepreneurial intention. In this study, surveys which consist of measurements and questions allowing drawing variables and verifying the relationship between variables, and empirical study methods that prove in accordance with statistics process of measured data were implemented. To conclude, the results are as follows. It was showed in supplemental analysis performed through path analysis that tax support system and financial support system influence entrepreneurial intention.

• Journal of Korean Society for Geospatial Information Science
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• v.7 no.1 s.13
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• pp.29-40
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• 1999

In vector GIS, natural linear entities (called linear entitles) are usually represented by a set of line segments. As an alternative of the line segments, curve segments can be used to represent the linear entities. The curve segments, as one-dimensional spatial objects, we generated by spline interpolation technique such as Bezier technique. In an effort to improve its accuracy in resembling the linear entities, the Bezier technique was modified generating a new technique (called New technique) (Kiyun, 1998). In this paper, validity of the New technique was tested. Test focused on answering two questions: (1) whether or not the curve segments from the New technique replace line segments so as to enhance the accuracy of representations of linear entities, and (2) whether or not the curve segments from the New technique represent the linear entities more accurately than curve segments from the Bezier technique. Answering these two questions entailed two hypothesis tests. For test data, a series of hydrologic lines on 7.5-minute USGS map series were selected. Test were done using t-test method and statistical inferences were made from the results. Test results indicated that curve segments from both the Bezier and New techniques represent the linear entities more accurately than the line segments do. In addition, curve segments from the New technique represent the linear entities more accurately than the line segments from the Bezier technique do at probability level 69% or higher.

• The Journal of the Korea Contents Association
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• v.15 no.10
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• pp.150-159
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• 2015

This study attempted to test the scale effect of MAUP, particularly focusing on the spatial autocorrelation of sex crime, correlations among neighborhood structural variables, and causal mechanism leading to sex crime. Analysis results of nation-wide Eup-Myon-Dong and Si-Gun-Gu data discovered that the spatial autocorrelation, correlations among independent variables, and determinant coefficient of multiple regression of Si-Gun-Gu level were generally bigger and stronger than those of Eup-Myon-Dong, which appeared to be due to the averaging effect. Regarding the causal effect to sex crime, two interesting results were found: First, the ratio of non-apartment residency lowered sex crime at both levels contrary to the hypothesis. Second, the ratio of food and lodging increased sex crime only at Eup-Myon-Dong level. These suggested that future research need to perform more detailed analyses dividing data into subsets such as urban vs. rural and/or economically advantaged vs. disadvantaged areas.

• Korean Journal of Social Welfare
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• v.51
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• pp.141-156
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• 2002

The relation among social support, depressive symptoms, and living arrangements were examined in a non-random sample of 175 adults age 60 and older. A convenience sample was obtained through a personal interview. A structural equation modeling approach was used to explore the role of social support in the relation between the living arrangements of elderly Koreans and their level of depressive symptoms. These results are consistent with previous analyses suggesting that social support plays a significant role in moderating depressive symptoms, in relation to negative living arrangements among older Korean populations (the buffering-effect hypothesis).

• Knowledge Management Research
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• v.24 no.4
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• pp.153-176
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• 2023

Generative AI, especially conversational AI like ChatGPT, has recently gained traction as a technological alternative for automating customer service. However, there is still a lack of research on whether current generative AI technologies can effectively replace traditional human managers in customer service automation, and whether they are advantageous in some situations and disadvantageous in others, depending on the conditions and environment. To answer the question, "Can generative AI replace human managers in customer service activities?", this study conducted experiments and surveys on customer online reviews of a food delivery platform. We applied the perspective of the elaboration likelihood model to generate hypotheses about whether there is a difference between positive and negative online reviews, and analyzed whether the hypotheses were supported. The analysis results indicate that for positive reviews, generative AI can effectively replace human managers. However, for negative reviews, complete replacement is challenging, and human managerial intervention is considered more desirable. The results of this study can provide valuable practical insights for organizations looking to automate customer service using generative AI.

• The Korean Journal of Applied Statistics
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• v.27 no.1
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• pp.1-11
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• 2014

The Weighted Logrank test and its special case, Logrank test are widely used to compare survival distributions; however, these methods are inappropriate when the sample size is small or censoring distributions are not equal since they use test statistics from approximate distributions. A permutation test can be an alternative for small sample cases; however, this should be used only when censoring distributions are equal. To handle cases with small sample size and unequal censoring distributions, the permutation-imputation method was developed to compare two survival distributions. In this paper, approximate method, permutation method and permutation-imputation method were compared using a Logrank test and Prentice-Wilcoxon test for three or more survival distributions comparison.

• Archives of design research
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• v.14 no.2
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• pp.253-266
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• 2001

In this study was groped a plan for an idea and method of design as the alternative of cure of cocial defect. Ailo, it was referred how an idea and method of design could be used for a cure of social defect and it was considered that an educational form that to actualize the idea and method of design is the basic structure of a cure or improvement of social defect. This educational form actualities exactly the 'media'which the idea and method of design pursue. In the end, an effect of media could probably make social change be practical.

• Culinary science and hospitality research
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• v.17 no.5
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• pp.139-153
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• 2011

The study is a hotel firm's brand evidence on the switching and relational performance by identifying a causal relationship to the differentiated and competitive was to provide useful information. Units of samples for evidence of brand switching hotels in Seoul participated in surveys customers in 2011, from June 10 to 20 July 2011 for a total of 500 copies for distribution and the Department of dual 408 with SPSS 18.0 and AMOS 18.0 Using factor analysis and reliability verification carried out, and presented research in order to test the hypothesis covariance structure analysis was performed. Analysis, employee services switching barriers and switching costs showed no significant affect. Switching barriers and switching costs, brand name, image congruence transition castle wall and switching costs, alternative attractiveness showed no significant visible results. And perceived price on switching barriers to conversion rates showed was significant affect. Second, switching barriers, switching costs, alternative attractiveness and that the relationship, to help conversion of non-financial performance showed no significant affect. Third, the practitioner services, brand names, images, match the castle there, and non-financial performance of the transition showing a statistically significant result was found.