• 한국벤처창업학회:학술대회논문집
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• 한국벤처창업학회 2022년도 춘계학술대회
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• pp.123-126
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• 2022

Online reviews offer valuable information to businesses by reflecting consumer experiences about their products and services. Two important aspects of online reviews are first, the topics consumers choose to address and second, the sentiments expressed in their reviews. Building upon previous literature that shows online reviews are context-dependent, we examine the impact of topic distribution on review sentiment in South Korea and the U.S. during pre-and post-pandemic periods. After performing topic modeling on Airbnb app review data, we measure the contribution of each topic on review sentiment using SHAP values. Our results indicate variations in topic distribution trends between 2018 and 2021. Also, the order and magnitude of topics' impact on review sentiment change between pre-and post-pandemic periods for both countries. This study can help businesses to understand how topics and sentiments associated with their products and services changed after pandemic, and also help them identify areas of improvement.

• Asia pacific journal of information systems
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• 제32권3호
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• pp.514-536
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• 2022

Online reviews offer valuable information to businesses by reflecting consumer experiences about their products and services. Two crucial aspects of online reviews are the topics consumers choose to address, and the sentiments expressed in their reviews. Building upon previous literature that shows online reviews are context-dependent, we employ the Expectation-Confirmation Theory (ECT) to examine the impact of topic distribution on review sentiment in South Korea and the U.S. during pre- and post-pandemic periods. After applying a topic modeling to Airbnb app review data, we measure the contribution of each topic on review sentiment using SHAP values. Our results indicate variations in topic distribution trends between 2018 and 2021. In addition, the order and magnitude of topics' impact on review sentiment change between pre- and post-pandemic periods for both countries. This study can help businesses understand how topics and sentiments associated with their products and services changed after the pandemic and thus identify areas of improvement.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2009년도 춘계학술대회 논문집
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• pp.577-578
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• 2009

• 한국독성학회:학술대회논문집
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• 한국독성학회 2003년도 추계학술대회
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• pp.84-85
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• 2003

The process of drug development has seen major changes over the last two decades with the movement away from standard small molecule drug discovery programs, through computer-assisted drug design methodologies towards biotechnologically derived products. The aim of duplication of endogenously active materials to be administered exogenously has enormous impact on development practices and evaluation of safety.(omitted)

• Structural Engineering and Mechanics
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• 제59권2호
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• pp.327-341
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• 2016

This study addresses the effect of pre-stressed cables on a pre-stressed mega-braced steel frame through employing static analysis and pushover analysis. The performances of a pre-stressed mega-braced steel frame and a pure steel frame without mega-braces are compared in terms of base shear, ductility, and failure mode. The influence of the cable parameters is also analyzed. Numerical results show that cable braces can effectively improve the lateral stiffness of a pure frame. However, it reduces structural ductility and degenerates structural pre-failure lateral stiffness greatly. Furthermore, it is found that 20% fluctuation in the cable pretension has little effect on structural ultimate bearing capacity and lateral stiffness. As comparison, 20% fluctuation in the cable diameter has much greater impact.

• 대한지구과학교육학회지
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• 제16권3호
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• pp.374-384
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• 2023

이 연구는 사회적 요구에 의해 강조되고 있는 집단지성, 가치관, 소프트웨어를 적용하여 예비교사들이 통합과학교육 프로그램을 개발하는 과정에서 예비교사에게 미치는 영향을 알아보았다. 이러한 결과로 첫째, 집단지성을 활용한 통합과학교육 프로그램 개발은 예비교사의 학습동기를 향상시켰다. 특히 수행과정에서 학습동기가 향상되는 것이 나타났다. 둘째, 집단지성 기반 통합과학교육 프로그램 개발은 예비교사들의 집단지성 역량을 함양하였다. 프로그램을 개발, 시연, 피드백하는 전 과정에서 집단의 긍정적 영향이 발현되었다. 셋째, 과학 교과에 소프트웨어와 개인의 가치관은 접목할 필요가 있으나 이를 위해 전문적 지원이 필요한 것으로 나타났다.

• 문화기술의 융합
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• 제9권5호
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• pp.957-969
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• 2023

본 연구는 예비유아교사의 교직선택동기, 교직인성, 그릿이 행복플로리시에 미치는 영향을 살펴보기 위하여 경기도 H시에 소재한 한 전문대학 유아교육과에 재학중인 112명의 예비유아교사를 대상으로 실시되었다. 중다회귀분석을 통해 각 변인이 행복플로리시에 미치는 영향을 살펴본 결과, 예비유아교사의 교직선택동기, 교직인성, 그릿은 행복플로리시에 모두 유의한 영향을 미쳤으며, 그 영향력의 크기는 교직인성이 나머지 두 변인에 비해 큰 것으로 나타났다. 다음으로, 교직선택동기, 교직인성, 그릿의 하위요인이 행복플로리시에 미치는 영향을 살펴본 결과, 능동적 동기 및 수동적 동기, 보편인성, 노력의 꾸준함 요인이 예비유아교사의 행복플로리시에 영향을 미치는 것으로 나타났다. 본 연구는 예비유아교사의 행복플로리시 향상을 위한 프로그램 마련의 기초적 자료를 제공하였으며, 교직선택동기 및 인성, 그릿의 향상을 통한 행복플로리시 증진 프로그램 설계 및 이의 검증에 대한 후속 연구를 제안하였다.

• 한국콘텐츠학회논문지
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• 제12권8호
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• pp.373-379
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• 2012

공공건설사업은 사람들의 복지 후생 향상과 국가 또는 공공단체 등이 공공자원을 사용하여 시행된다. 따라서 본 논문은 공공건설사업의 성과를 제고시키기 위해 건설성과에 영향을 주는 요인을 파악하였다. 그리고 전문가를 대상으로 AHP를 실시하여 영향요인 별 영향정도를 가중치로 제시하였다. 이를 위해 먼저 영향요인을 건설관련 제도, 프로젝트 관리노력, 프로젝트 환경을 구분하고 세부 영향요인 16개를 제시하였다. 그 결과 적정 예산확보, 합리적 사업시행 절차, 사전 기획 등의 순으로 가중치가 결정되었다. 이는 시공 이전단계의 업무에 해당되는 요인들로 시공이전단계의 관리업무의 중요성을 나타내고 있다. 반면, 자재조달, 작업난이도, 현장 조건 등 시공과 관련된 요인의 중요도는 상대적으로 낮은 것으로 나타났다. 본 연구 결과를 바탕으로 가중치가 높게 나타난 영향요인을 중점 관리하여 건설공사의 성공적인 수행이 가능할 것이다.

• East Asian mathematical journal
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• 제35권4호
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• pp.429-449
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• 2019

This study aims to investigate the statistical literacy of pre-service mathematics teachers and to discuss the impact of statistical literacy in lesson plan. For the purpose of this study, we analyzed 13 pre-service mathematics teachers' statistical literacy tests and lesson plans. The results of this analysis are as follows: First, pre-service mathematics teachers did not have a high level of statistical literacy, and it was also observed that there was a big level difference between them. Second, pre-service mathematics teachers' lesson plans showed significant difference in the level of the target grade, the characteristics of the target student, and the contents. Based on this study, we seek to find implications for how it is appropriate to educate teachers in charge of statistical education.

• Asia Marketing Journal
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• 제18권3호
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• pp.1-18
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• 2016

The purpose of this paper is to examine empirically how to balance advertising expenditure before and after launch with regard to the direction of word of mouth in the motion picture industry. The vector auto-regression model is applied to assess the dynamic impact of advertising and word of mouth on sales. Empirical data, including advertising, word of mouth, and sales (the number of entries) of 83 movies are used for analysis. The research results show that for a movie having more positive word of mouth in the pre- and post-launch periods, it is worthwhile to spend the advertising budget in the pre-launch period only and to spare it in post-launch period. However, it is worthwhile to spare the advertising budget in the pre-launch period for movies having less positive word of mouth before and after launch, and to concentrate spending in post-launch period instead. Mangers who handle products and services facing shortened lifecycles, such as games, eBooks, and digital music contents, need to check the quality of pre-launch word of mouth for their advertising budget decisions in the pre- and post-launch periods and spend more of the advertising budget in the post- (pre-) launch period if pre-launch word of mouth is negative (positive). For products and services with a shortened lifecycle, it is recommended to spend more of the advertising budget in the post- (pre-) launch period if pre-launch word of mouth is negative (positive).