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웹 기반 공동구매모형에서 거래의 특징이 분배적 정의와 거래의도에 미치는 영향
방영석,이동주 한국경영정보학회 2011 한국경영정보학회 학술대회논문집 Vol.2011 No.1
새로운 전자상거래 모형으로 주목을 받고 있는 웹 기반 공동구매모형은 판매자에게는 매장 광고 및 상품 홍보의 수단을 제공하고, 소비자에게는 판매자로부터의 저렴한 구매 기회를 제공한다. 그러나, 공동구매모형을 통한 일시적인 고객 증가가 판매자의 지속적인 고객 및 매출 증가로 연결되지 않는 경우가 많아, 웹 기반 공동구매모형의 효과성에 대한 의문이 제기되고 있다. 본 연구에서는 웹 기반 공동구매모형을 통해 소비자와 판매자 모두 장기적인 관점에서 효용을 증진할 수 있는 방안을 제시하기 위하여 2가지의 실험을 수행하였다. 구체적으로, 웹 기반 공동구매모형에서 가격의 할인율과 거래의 입찰율이 소비자의 할인거래와 정상거래에 대한 분배적 정의에 미치는 영향을 파악하고, 나아가 분배적 정의가 각 거래에 대한 소비자의 거래의도에 미치는 영향을 규명하였다(실험 1). 또한, 정상거래 이용자가 할인거래에 대한 정보를 접하게 되었을 때, 할인율이 이용자의 정상거래에 대한 분배적 정의와 판매자에 대한 부정적 감정에 미치는 영향을 분석하고, 궁극적으로 정상거래에 대한 재거래의도에 미치는 영향을 파악하였다(실험 2). 분석 결과를 기반으로 협동적 구매모형의 지속가능 방안에 대해 논의한다.
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The Role of Application Rank in the Extended Mobile Application Download
방영석,이동주 한국경영정보학회 2015 Asia Pacific Journal of Information Systems Vol.25 No.3
The growing popularity of mobile application has led to researchers and practitioners needing to understand users’ mobile application download behaviors. Using large-scale transaction data obtained from a leading Korean telecommunications company, we empirically explore how application download rank, which appears to users when they decide to download a new application, affects their extended mobile application download. This terminology refers to downloading an additional application in the same category as those that they have already downloaded. We also consider IT characteristics, user characteristics, and application type that might be associated with the extended application download. The analysis generates the following result. Overall, a higher rank of a new application encourages the extended application download, but the linear relationship between the rank and the extended application download disappears when critical rank points are incorporated into the model. Further, no quadratic effect of rank is found in the extended application download. Based on the results, we suggest theoretical and managerial implications.
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방영석,김은경,김효정,이상용 한국원자력학회 1995 Nuclear Engineering and Technology Vol.27 No.1
최적 열수력 안전해석 계산코드의 검증에 이용될 수 있는 열수력 실험데이터, 실험데이터 관련 설명자료, 데이터베이스 운영체계 및 인터페이스 등으로 구성되는 단순화된 열수력 실험 데이터 뱅크 (Simplified Organization of Thermalhydraulic Experiment Databank, SORTED)를 개발하였다. 이를 위하여 USNRC와의 국제 연구 협력을 통해 ENCOUNTER실험데이터를 도입하였고, 이를 기본으로 코드 평가 목적에 적합하도록 단순화된 데이터베이스 운영관리 체제 및 사용자 편이성을 강조하는 인터페이스 등을 개발하였다. 개발된 SORTED의 이용성, 사용자 편이성 등이 검증되었으며, 코드 평가에 적절히 이용될 수 있음을 알 수 있었다.
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Assessment of RELAP5/MOD2 with LOFT L2-5 LBLOCA Test
방영석,이상용,김효정,김시환,Bang, Y.S.,Lee, S.Y.,Kim, H.J.,Kim, S.H. Korean Nuclear Society 1989 Nuclear Engineering and Technology Vol.21 No.4
LOFT L2-5 대형 냉각재상실사고 모사실험에 대해 RELAP5/MOD2/Cycle 36.04로부터 개선된 코드를 이용, 코드평가를 수행하였다. 강수관(Downcomer)모델 및 노심유로모델에 따른 코드 민감도분석을 위해 보충계산을 수행하였다. 계산결과는 1차계통의 압력, 파단부를 통과하는 질량유량, 노심 고온부의 피복재 온도등에 대해서 실험결과와 비교 분석되었다. 분석결과 RELAP5/MOD2 계산에 의해 1차계통의 수력학적 거동은 잘 묘사될 수 있으며, 단일 노심유로 모델을 이용한 계산에서는 사고발생이후 감압기간동안 노심이 과대 냉각되는 현상이 발견되었다. 노심의 고온유로에서의 수력학적 거동을 잘 묘사할 수 있는 이중 노심유로 모델계산을 이용하여 이 현상을 극복하고 실험치에 근사하는 결과를 얻을 수 있음을 알 수 있었다. An improved version of RELAP5/MOD2 Cycle 36.04 code is assessed for LOFI LBLOCA Test L2-5. Minor modifications to the original version have been done to avoic reflood related errors. Based on the modified version, one base case and two cases for sensitivity study on downcomer and core channel modelling are calculated. The calculation results are compared with the experimental data for primary system pressure, break mass How rate and cladding temperature at hot spot According to the comparison, it is found that the hydraulic system behaviors are well predicted, excessive core cooling exist in blowdown phase for a single core channel and a combined downcomer case, and a better result can be obtained for a two core channel case.
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소셜커머스에서 거래의 특성이 분배적 정의와거래 의도에 미치는 영향
방영석,이동주 한국경영정보학회 2013 Asia Pacific Journal of Information Systems Vol.23 No.2
Social commerce has been gaining explosive popularity, with typical examples of the model such as Groupon and Level Up. Both local business owners and consumers can benefit from this new e-commerce model. Local business owners have a chance to access potential customers and promote their products in a way that could not have otherwise been easily possible, and consumers can enjoy discounted offerings. However, questions have been increasingly raised about the value and future of the social commerce model. A recent survey shows that about a third of 324 business owners who ran a daily-deal promotion in Groupon went behind. Furthermore, more than half of the surveyed merchants did not express enthusiasm about running the promotion again. The same goes for the case in Korea, where more than half of the surveyed clients reported no significant change or even decrease in profits compared to before the use of social commerce model. Why do local business owners fail to exploit the benefits from the promotions and advertisements through the social commerce model and to make profits? Without answering this question, the model would fall under suspicion and even its sustainability might be challenged. This study aims to look into problems in the current social commerce transactions and provide implications for the social commerce model, so that the model would get a foothold for next growth. Drawing on justice theory, this study develops theoretical arguments for the effects of transaction characteristics on consumers’ distributive justice and purchase intention in the social commerce. Specifically, this study focuses on two characteristics of social commerce transactionsthe discount rate and the purchase rate of productsand investigates their effects on consumers’ perception of distributive justice for discounted transactions in the social commerce and their perception of distributive justice for regular-priced transactions. This study also examines the relationship between distributive justice and purchase intention. We conducted an online experiment and gathered data from 115 participants to test the hypotheses.Each participant was randomly assigned to one of nine manipulated scenarios of social commerce transactions, which were generated based on the combination of three levels of purchase rate (high, medium, and low) and three levels of discount rate (high, medium, and low). We conducted MANOVA and post-hoc ANOVA to test hypotheses about the relationships between the transaction characteristics (purchase rate and discount rate) and distributive justice for each of the discounted transaction and the regular-priced transaction. We also employed a PLS analysis to test relations between distributive justice and purchase intentions. Analysis results show that a higher discount rate increases distributive justice for the discounted transaction but decreases distributive justice for the regular-priced transaction. This, coupled with the result that distributive justice for each type of transaction has a positive effect on the corresponding purchase intention, implies that a large discount in the social commerce may be helpful for attracting consumers, but harmful to the business after the promotion. However, further examination reveals curvilinear effects of the discount rate on both types of distributive justice. Specifically, we find distributive justice for the discounted transaction increases concavely as the discount rate increases while distributive justice for the regular-priced transaction decreases concavely with the dscount rate. This implies that there exists an appropriate discount rate which could promote the discounted transaction while not hurting future business of regular-priced transactions. Next, the purchase rate is found to be a critical factor that facilitates the regular-priced transaction. It has a convexly positive influence on distributive justice for the transaction. Therefore, an increase of the ...
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