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임승준,김세훈,오상균,김정길,강병희 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
Serious problems of the environment protection and resource exhaustion are exhibited, due to the increase of the construction materials and activation of the remodeling, recently. Especially, most of the advanced countries, recycling plan for the waste concrete is vigorously progressing. The recycle of domestic waste concrete is, however, still in an early stage, and it has been only partially being used for the road fillers. As a counter-plan of activating recycled concrete, we have confirmed the hydration possibility of the waste concrete powder from the experiment on recycling the aggregate powder since 2000. Also, we have known that the strength is increasing when the heating time is longer, and baking temperature maintain in 700℃. The purpose of this study is to determine the most suitable production method controlling the duration of baking time for recycled cement from the compressive strength, X -ray diffraction and ingredient analysis test.
모바일 앱 서비스의 품질과 고객 만족에 관한 연구: 유료와 무료 모바일 앱 서비스의 비교
임승준,이정호,류춘호 대한경영학회 2019 大韓經營學會誌 Vol.32 No.11
The purpose of this study is to provide the factors that influence customer satisfaction in mobile app service & to examine the moderating effect of free or charged mobile applications on the causal relationship. For this purpose, The data collected through the survey were analyzed using structural equation modelling analysis. The sample was randomly selected for users who experienced at least three months and at least one mobile app service at a time. A total of 473 questionnaires were collected from 601 survey respondents by e-mail, SNS, and direct survey and A total of 453 questionnaires (75.4%) were used in the analysis by excluding 20 questionnaires predicting incomplete responses. According to the frequency analysis, 228 (50.3%) of the total respondents experienced the free mobile app service, and 225 (49.7%) of the total respondents experienced the charged mobile app service. First, as a result of the exploratory factor analysis, the outcome quality was changed to satisfactory, contextual interaction quality to personalization, fluid interaction quality to connectivity, and service environment quality to safety. Second, as a result of confirmatory factor analysis, the measurement model of this study is chi square = 151.730 (df = 80), chi square / df = 1.897, GFI = 0.956, AGFI = 0.934, RMSR = 0.024, RMSEA = 0.045, NFI = 0.952, CFI = 0.976. In addition, the concentration validity and discriminant validity of this model were confirmed. Hypothesis 1 examines the impact of mobile app service quality dimensions on customer satisfaction. and Hypothesis 2 is to test for differences from the mobile app service quality dimension affects customer satisfaction between free and charge mobile app service. The measurement model used for this study divided quality of mobile app service into four dimensions such as fulfillment, connectivity, personalization, and security. The results of this study are as follows; regarding the influence of quality dimension of mobile app service on customer satisfaction, it was found that the effects of fulfillment & personalization were significant & connectivity was not significant on customer satisfaction. It was found that there are moderating effect of free or charged mobile applications between security & customer satisfaction. Specifically, security had stronger effect on customer satisfaction in free mobile applications than charged mobile applications. The implications of this study are as follows. First, we confirm the mobile app service manufacturer what quality characteristics of the mobile app service increased with efficiency and customer satisfaction of the service. Second, a mobile app service provider may offer a charged mobile app service or If mobile app service provider switch your mobile app service from free to charged, There is a need to take advantage of the fact that fulfillment of mobile app service information and personalized information provision can increase customer satisfaction. Also, the safety of mobile app services, in other words privacy is not a factor in customer satisfaction with charged mobile app services. In addition, it is important to note that privacy can promote customer satisfaction in free mobile app services. The result of this study is meaningful because it suggests future studies on the influence of mobile app service quality, related factors, and regulatory factors. In addition, if a company pursues a smart business using mobile app services. The results of this study are expected to be used to explore and apply what characteristics of mobile app services can increase company efficiency and customer satisfaction. The limitation of this study is that only 12 items were refined during the analysis of measurement model using sample data out of 25 items related to mobile app service quality. Future research will require the development of metrics for the quality of mobile app services. 본 연구의 목적은 모바일 앱 서비스에서 고객 만족에 영향을 미치는 서비스 품질 요인을 제공하고 인과관계에 대한 무료 또는 유료 모바일 애플리케이션의 조절 효과를 검증하는 것이다. 본 연구는 설문 조사를통해 수집한 데이터를 구조방정식을 통해 분석하였다. 본 연구의 가설 1은 모바일 앱 서비스 품질 차원이 고객 만족에 미치는 영향을 검정하는 것이며, 가설2는 모바일 앱 서비스 품질 차원이 유료와 무료 모바일 앱 서비스 간 고객 만족에 미치는 영향에 대해 차이가있는지를 검정하는 것이다. 본 연구에 사용된 모바일 앱 서비스 측정 모형은 모바일 앱 서비스의 품질을 충족성, 접속성, 개인화, 그리고 안전성의 네 가지 차원으로 구성되었다. 이를 통해 본 연구는 위와 같은 측정 모형을통해 가설을 검정하였다. 본 연구의 결과는 다음과 같다. 첫째, 모바일 앱 서비스의 품질 차원이 고객 만족에 미치는 영향은 정보의충족성과 개인화된 정보의 제공은 고객 만족에 유의한 영향을 미치고 접속성은 고객 만족에 유의한 영향을미치지 않는 것으로 나타났다. 둘째, 안전성이 고객 만족에 미치는 영향은 무료 또는 유료 모바일 애플리케이션이 조절 효과가 있음이 확인되었다. 특히 안전성은 유료 모바일 애플리케이션보다 무료 모바일 애플리케이션의고객 만족에 더 큰 영향을 미치는 것으로 나타났다. 본 연구의 시사점은 첫째, 모바일 앱 서비스 제조사에게 모바일 앱 서비스의 어떤 품질 특성이 서비스의효율성과 고객 만족을 증가시키는지, 그리고 모바일 앱 서비스의 품질이 고객 만족을 유인하는 방식은 무엇인지를 보여준다. 둘째, 모바일 앱 서비스 제조사가 소비자에게 유료 모바일 앱 서비스를 제공하거나 무료에서유료로 모바일 앱 서비스를 전환할 경우, 모바일 앱 서비스의 정보 충족성과 개인화된 정보 제공이 고객의만족을 증가시킬 수 있다는 것을 활용할 필요가 있다. 또한 모바일 앱 서비스의 안전성, 즉 개인정보 보호는유료 모바일 앱 서비스에서 고객 만족에 영향을 미치는 요인이 아니며, 오히려 무료 모바일 앱 서비스에서고객 만족을 촉진시킬 수 있음을 주목할 필요가 있다. 본 연구의 결과는 모바일 앱 서비스를 제작하거나 무료 모바일 앱 서비스를 유료 모바일 앱 서비스로 변경하고자 하는 기업에 유용한 대안을 제공한다.