• Proceedings of the Korean Operations and Management Science Society Conference
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• 2007.11a
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• pp.288-305
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• 2007

본 논문은 데이터 마이닝의 기법 중 가장 잘 알려진 지도학습 기법의 성능 향상을 위한 새로운 Hybrid 및 Combined 기법인 불일치 패턴 모델(오차 패턴 모델)에 대한 연구 논문이다. 불일치 패턴 모델이란 2개 이상의 기법 중 향후 더 레코드별로 더 잘 맞출 수 있는 기법을 메타 분류하는 불일치 패턴 모델을 개발하여, 최종적으로는 기존의 기법보다 더 좋은 분류 정확도 및 예측 향상율을 기대하기 위한 기법을 의미한다. 본 논문에서는 의사 결정나무 추론 기법인 C5.0과 C&RT 그리고 신경망 분석, 그리고 로지스틱 회귀분석과 같은 대표적인 데이터 마이닝의 지도학습 기법을 이용하여 불일치 패턴 모델을 생성하여 보고, 이들이 기존 단일 기법과 기존의 Combined 모델인 Bagging, Boosting 그리고 Stacking 기법보다 성능이 우수함을 23개의 실제 데이터 및 공신력 있는 공개 데이터를 이용하여 증명하여 보였다. 또한 데이터의 특성에 따라서 불일치 패턴 모델의 성능의 변화 및 더 우수해 지는지를 알아보기 위한 연구포 같이 수행을 하여 본 모델의 활용성을 높이고자 하였다.

• Asia Marketing Journal
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• v.3 no.4
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• pp.90-115
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• 2001

본 연구는 서비스 접점에서 서비스 실패가 일어나는 경우 기업의 복구노력이 고객의 만족에 마치는 영향에 관한 연구이다. 먼저 서비스 실패에 대한 기업의 복구노력이 갖는 의미를 살펴보고, 서비스 복구노력이 고객의 만족과정에 어떻게 영향을 미치는 지에 대하여 항공산업을 연구대상으로 기대불일치이론, 정당성이론 및 귀인이론을 적용하여 다양한 관점에서 실증 분석하였다. 특히 기대불일치이론 및 정당성이론에 관한 선행 연구들을 상세히 고찰하고, 이러한 이론적 관점에서 서비스 실패 후 기업의 복구노력이 고객의 만족과정에 어떻게 영향을 미치는 지를 다중회귀분석 및 구조방정식 모형을 이용하여 실증 분석하였다. 또한 조직행동론의 연구결과를 이용하여 서비스 실패에 대한 귀인적 추론결과가 소비자의 만족과정에 미치는 영향을 검증하였다

• Journal of KIISE:Computing Practices and Letters
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• v.15 no.5
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• pp.400-404
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• 2009

Native Command Queueing is a technology to maximize throughput of disk system by reordering requests in its command queue. Recent S-ATA 2 standard specifies a protocol for the purpose of dealing with NCQ feature, making most vendors implementing it in their disk devices. However, the new feature, NCQ, may lead to information gap between OS and disk drive. 05 considers that disk will service I/O requests in the order as OS has dispatched. Unfortunately, it isn't true any more since NCQ would simply ignore the policy of OS and reorder the sequence OS has expected. Let us define the term as expectation-discord. Due to the discord, serious performance anomalies or starvation of requests may occur in I/O subsystem. In this paper, we confirm that the expectation-discord actually brings about starvation of requests. We propose a solution to settle it. Our solution is very simple, effective, cheap(not requiring any hardware modification) and portable across various OS. Experimental results show that our solution can balance throughput and response time very well.

• Korean Journal of Culture and Social Issue
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• v.29 no.4
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• pp.617-636
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• 2023

The goal of this study was to explain the phenomenon of making efforts to overcome the need-reality collision as a cultural characteristic of Koreans. Specifically, we examined whether the behavior varies depending on the degree of relational agency in the situation where conflicts between one's needs and reality have occurred. To this end, a total of 217 participants participated in the online experiment, and the data of 156 participants were finally analyzed. After responding to the relational agency scale, the participants were exposed to a decision-making scenario in which conflicting factors existed. The scenario were about buying a house and making a wedding hall contract, and in each scenario, two important values were set to conflict with each other in the market. Participants read the scenario and entered the level they wanted for each value. After that, they encounter a situation in which he or she has not found the candidate site corresponding to the level he or she wants. Then, the participants responded to their willingness to make additional efforts themselves. As a result of the study, the degree of relational agency of the participants showed a positive relationship with the degree of additional effort. In addition, the degree of the desired level beyond the reality (expectancy discrepancy) showed a nonlinear (reverse U-shape) influence on the additional effort while controlling for individual difference. Furthermore, the interaction effect between relational agency and expectancy discrepancy was significant. Specifically, individuals with low agency did not have a significant relationship between the degree of expectancy discrepancy and the dependent variable, but individuals with high relational agency had a significant non-linear relationship between the degree of expectancy discrepancy and the dependent variable. Based on the results of the study, the role and function of Koreans' psychological characteristics (relational agency) in the scene of managing needs-reality collision were discussed.

• Journal of Global Scholars of Marketing Science
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• v.8
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• pp.207-232
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• 2001

Many customer satisfaction studies have accepted the confimation/disconfirmation paradigm, but the findings as the antecedents of consumer satisfaction are mixed. So rather than asking whether or not there is a direct effect of a certain variable on satisfaction, it is necessary asking when does a certain variable have a direct effect on satisfaction. According to this result, we assume that the situation has a direct effect on satisfaction. So this study has investigated the moderating role of perceived heterogeneity as a unit of situation, in the process of customer satisfaction formation, especially on public service. We have found such thing as follows. 1) situation has an effect on customer satisfaction. 2) perceived heterogeneity of the customers, as a situation variable, lets the process of their satisfaction formation differ. 3) through these studies, the confirmation/disconfirmation paradigm are able to extend on public services.

• The Journal of the Korea Contents Association
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• v.11 no.2
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• pp.287-302
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• 2011

In this paper, we analyzed audience satisfaction procedures in performing art, specifically in musical, in terms of Expectation Disconfirmation Theory. We analyzed one's expectations and outcomes over time; we first classified audience expectations and outcomes about environmental elements as 'the first expectation'/'the first outcome' and about watching situation & content itself as 'the second expectation'/'the second outcome', then analyzed by comparing those two. Through surveying and analyzing the result, this paper serves that the ultimate fact which affects on the final audience satisfaction is 'the second outcome', which is the outcome about watching situation & content itself. This paper also shows that audience expectation toward physical quality of environment affects to 'the second expectation', then 'the second expectation' affects to 'the second outcome', so then affects to the final satisfaction. However, 'the first outcome' doesn't affect to 'the second expectation'; in other words, the physical environment does not affect much to the audience final satisfaction. We expect that our study provides clues for venue management in performing arts.

• Journal of the Korean Home Economics Association
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• v.45 no.5
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• pp.1-13
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• 2007

The purpose of this study was to explore the well-being attitude and use the expectation-disconfirmation model to assess consumer satisfaction with well-being products. The consumer expectations, performance and disconfirmation scales were composed of 7 items of 5-likert scales. Consumer satisfaction with well-being products was measured with one-item-measurement scale. The results of this study are as follows. 1. The well-being attitude consists of 4 factors. : consumption of the well-being products, pursuit of mental well-being, criticism of commercial fashion, and pursuit of harmony with natural life. 2. Well-being attitude influences the consumers' expectation, performance, and satisfaction with well-being products. 3. Consumer expectation for well-being products has no influence on satisfaction, but performance and disconfirmation have a high degree of influence on satisfaction.

• Asia Marketing Journal
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• v.1 no.1
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• pp.2.1-2.38
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• 1998

본 연구에서는 소비자 만족 형성 과정에서 발현되는 소비자의 감정 반응의 역할에 대해 이론적 및 실증적으로 고찰하였다. 소비자 감정 반응에 관한 선행 연구의 고찰을 통해 소비자 만족 형성 과정에서 발현되는 소비자 감정 반응은 구매라는 사건을 중심으로 기분 상태와 소비 정서라는 주요한 범주로 구분할 수 있음을 발견하였다. 다음으로 감정과 인지의 관계를 설명하는 이론, 특히 정서의 인지적 평가 이론을 기초로 기존의 기대-불일치 모형에 의한 인지적 과정과 기분 상태→소비 정서의 감정적 과정을 결합하는 연구 모형을 수립하고 확인적 요인 분석과 구조 방정식 모형으로 실증 분석하였다. 실증 연구 결과 점포 내 기분 상태는 유쾌와 각성, 소비 정서는 긍정적 소비 정서와 부정적 소비 정서의 차원으로 구분되며, 기대가 소비자의 점포 내 기분 상태의 인지적 평가로, 불일치가 소비 정서의 인지적 평가로 간주될 수 있으며, 점포 내 기분 상태가 제품의 성과 판단과 소비 정서에 직접적으로 영향을 미친다는 사실이 밝혀졌다.

• Asia pacific journal of information systems
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• v.14 no.1
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• pp.101-123
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• 2004

User satisfaction has been widely used by information system(IS) researchers as the most appropriate surrogate variable for the systems success since Bailey and Pearson(1983) provided their user satisfaction measurement. Because user satisfaction is a perceived performance measure by users, not a real or objective measure for systems success, however, perceived user satisfaction by users may not be exactly identical with the real systems performance. In this regard, if the user's ultimately perceived satisfaction is different from the real systems performance, we need to investigate why these two measures are different and which factors may cause the difference. From the perspective of disconfirmation of user expecations, this study examined why user satisfaction and real systems performance may not be identical each other. Expectaion-disconfirmation theory which has had a central role in marketing in explaining the effects of expectation and disconfirmation on consumer satisfaction was similarly adopted in this study to explain the role of expectation and disconfirmation in user satisfaction in the IS environment. Based on the expectation-disconfirmation theory, the current study developed a research model to examine the effects of expectation, system performance, and disconfirmation on user satisfaction in particular. Six research hypotheses derived from the research model were empirically tested using the partial least squares(PLS) method. The results of the statistical analysis indicate that the effects of system performance and disconfirmation were fairly strong on user satisfaction, while the user's expectation has shown insignificant influences on user satisfaction.

• The Journal of the Korea Contents Association
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• v.22 no.1
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• pp.283-291
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• 2022

Due to the impact of COVID-19, untact performances where performance videos are recorded, edited and distributed have begun to be activated in a non-face-to-face environment. Performance halls are supporting untact performance services such as video production and broadcasting so that performances can be viewed through online platforms. Therefore, this study intends to study the satisfaction and continued use intention of the untact performance service in the concert hall for experts who have experience using the untact performance service in the concert hall. A total of 9 hypotheses were rejected and 10 hypotheses were adopted as a result of developing and analyzing a research model suitable for the untact performance service of the concert hall by fusion of the information system success model and the expectation inconsistency model. Excluding content quality, it was found that in both system quality and service quality, inconsistency occurs through the comparison of expectations and performance after expectations arise. This positive discrepancy affects satisfaction, and the higher the satisfaction, the higher the intention to continue using it. This study is a basic study on the untact performance service and is expected to provide a new perspective for quality improvement.