• Journal of Information Processing Systems
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• 제17권2호
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• pp.426-439
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• 2021

To alleviate the cold-start problem and data sparsity in web service recommendation and meet the personalized needs of users, this paper proposes a personalized web service recommendation method based on a hybrid social network and multi-objective immune optimization. The network adds the element of the service provider, which can provide more real information and help alleviate the cold-start problem. Then, according to the proposed service recommendation framework, multi-objective immune optimization is used to fuse multiple attributes and provide personalized web services for users without adjusting any weight coefficients. Experiments were conducted on real data sets, and the results show that the proposed method has high accuracy and a low recall rate, which is helpful to improving personalized recommendation.

• Asia pacific journal of information systems
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• 제29권2호
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• pp.203-216
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• 2019

There is an accuracy-diversity dilemma with personalized recommendation services. Some researchers believe that accurate recommendations might reinforce customer satisfaction. However, others claim that highly accurate recommendations and customer satisfaction are not always correlated. Thus, this study attempts to establish the causal factors that determine customer satisfaction with personalized recommendation services to reconcile these incompatible views. This paper employs statistical analyses of simulation to investigate an accuracy-diversity dilemma with personalized recommendation services. To this end, we develop a personalized recommendation system and measured accuracy, diversity, and customer satisfaction using a simulation method. The results show that accurate recommendations positively affected customer satisfaction, whereas diverse recommendations negatively affected customer satisfaction. Also, customer satisfaction was associated with the recommendation product size when neighborhood size was optimal in accuracy. Thus, these results offer insights into personalizing recommendation service providers. The providers must identify customers' preferences correctly and suggest more accurate recommendations. Furthermore, accuracy is not always improved as the number of product recommendation increases. Accordingly, providers must propose adequate number of product recommendation.

• 서비스연구
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• 제8권4호
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• pp.31-51
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• 2018

본 기술의 발전과 인터넷 환경의 변화로 인터넷 기반의 동영상 제공 서비스인 OTT(Over-the-top) 서비스 시장이 빠르게 성장하고 이용자의 데이터를 바탕으로 맞춤형 정보 및 콘텐츠를 제공하는 개인화추천서비스에 대한 고객의 요가 커졌다. 본 연구는 OTT 서비스의 개인화추천서비스가 관계강화와 고객충성도에 미치는 영향을 분석하며, 나아가 콘텐츠 유형에 따라 개인화추천서비스가 가지는 의미의 차이를 확인하여 개인화추천서비스의 제공 방안을 제시하는 것을 목적으로 한다. 연구결과에 따르면 OTT 서비스의 개인화추천서비스는 관계강화를 매개로 고객충성도에 유의한 영향을 미치며, 고객이 주로 이용하는 콘텐츠의 형태 및 내용에 따라 개인화추천서비스가 관계강화와 고객충성도에 미치는 영향에 차이가 있다. 본 연구를 통해 개인화추천서비스는 고객과의 관계 형성 및 몰입을 유도하여 관계를 강화하는 도구로 활용될 수 있고 이는 고객충성도를 향상하며, 고객과의 소통이 활발한 콘텐츠일수록 개인화추천서비스의 제공이 충성도 향상에 크게 기여함을 알 수 있다.

• 경영정보학연구
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• 제25권4호
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• pp.67-87
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• 2023

온라인 쇼핑 플랫폼은 개인화 추천 시스템을 활용하여 소비자의 개인 정보와 행동 데이터를 수집, 분석 및 마이닝을 통해 소비자에게 맞춤형 추천 서비스를 제공함으로써 소비자의 잠재적인 쇼핑 욕구를 자극한다. 본 연구는 S-O-R 모델을 기반으로 온라인 쇼핑 추천이 구매의도에 미치는 영양을 분석하기 위하여 시스템 품질인 다양성과 정확성, 정보 품질인 설득력과 완전성을 외부 자극으로 설정하고, 신뢰 및 지각된 가치에 따른 소비자의 심리상태 하 유기체로 설정하여 구매의도 간에 관계를 탐구하였다. 온라인 쇼핑 플랫폼을 이용하는 소비자를 대상으로 설문조사를 실시하였다. 분석결과는 개인화 추천 시스템의 품질과 정보 품질이 신뢰와 지각된 가치에 미치는 영향에 대한 가설이 모두 채택되었다. 신뢰가 시스템 품질, 정보 품질에 대한 구매의도와의 관계에서 매개역할을 확인하였으며 지각된 가치는 정보 품질에 대한 구매의도와의 관계에서 매개역할을 확인하였다. 추천 시스템이 제공하는 콘텐츠는 소비자 경험을 개선하고 소비자의 수용 정도를 높일 수 있는 방향으로 설계되어야 한다는 시사점을 도출하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권12호
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• pp.3266-3285
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• 2023

With the popularity of online learning, intelligent tutoring systems are starting to become mainstream for assisting online question practice. Surrounded by abundant learning resources, some students struggle to select the proper questions. Personalized question recommendation is crucial for supporting students in choosing the proper questions to improve their learning performance. However, traditional question recommendation methods (i.e., collaborative filtering (CF) and cognitive diagnosis model (CDM)) cannot meet students' needs well. The CDM-based question recommendation ignores students' requirements and similarities, resulting in inaccuracies in the recommendation. Even CF examines student similarities, it disregards their knowledge proficiency and struggles when generating questions of appropriate difficulty. To solve these issues, we first design an enhanced cognitive diagnosis process that integrates students' affection into traditional CDM by employing the non-compensatory bidimensional item response model (NCB-IRM) to enhance the representation of individual personality. Subsequently, we propose an affection-enhanced personalized question recommendation (AE-PQR) method for online learning. It introduces NCB-IRM to CF, considering both individual and common characteristics of students' responses to maintain rationality and accuracy for personalized question recommendation. Experimental results show that our proposed method improves the accuracy of diagnosed student cognition and the appropriateness of recommended questions.

• 한국콘텐츠학회논문지
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• 제22권7호
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• pp.164-175
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• 2022

OTT(Over The Top) 플랫폼은 개인화된 추천 서비스가 이용자들을 플랫폼에 더 오래 머물게 하고, 더 자주 방문하게 한다는 점에서 차별적 경쟁우위 특성을 강화하기 위해 노력하고 있다. 본 연구에서는 개인화된 추천 서비스의 특성을 추천 정확성과 추천 다양성, 추천 신기성의 3가지로 구분하고, 각 특성이 이용자가 추천 서비스에 대해 인지하는 유용성에 영향을 미치고, 기대충족으로 이어지는 연구모형을 제안하였다. 넷플릭스를 정기구독 결제하는 20, 30대 300명을 대상으로 온라인 설문조사를 진행한 결과, 추천 서비스의 정확성과 다양성, 신기성이 높았을 때 지각된 유용성이 높아짐을 확인하였다. 높은 지각된 유용성은 넷플릭스 이용 전후의 기대충족으로 이어진다는 점 역시 확인하였다. 도출된 연구 결과는 개인화된 추천 서비스 평가에서 이용자 경험 측면의 중요성과 추천 서비스 품질 개선 방안에 대한 시사점을 제공할 수 있을 것이다.

• 대한안전경영과학회지
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• 제10권4호
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• pp.309-314
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• 2008

Many studies on predicting and recommending information and products have been studying to meet customers' preference. Unnecessary information should be removed to satisfy customers' needs in massive information. The some information filtering methods to remove unnecessary information have been suggested but these methods have scarcity and scalability problems. Therefore, this paper explores a personalized recommendation system based on artificial neural network (ANN) to solve these problems. The insurance product recommendation is adapted as an example to demonstrate the proposed method. The proposed recommendation system is expected to recommended a suitable and personalized insurance products for customers' satisfaction.

• 디지털산업정보학회논문지
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• 제18권4호
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• pp.85-96
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• 2022

Personalized recommendation technology is one of the most important technologies in electronic commerce environment. It helps users overcome information overload by suggesting information that match user's interests. In e-commerce environment, both mobile device users and smart device users have risen dramatically. It creates new challenges. Our method suggests product information that match user's device interests beyond only user's interests. We propose a device-centered personalized recommendation method. Our method uses both purchase and share behavior for user's devices interests. Moreover, it considers data type preference for each device. This paper presents a new recommendation method and algorithm. Then, an e-commerce scenario with a computer, a smartphone and an AI-speaker are described. The scenario shows our work is better than previous researches.

• Asia pacific journal of information systems
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• 제17권1호
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• pp.123-145
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• 2007

There are flourishing studies in the acceptance or usage of information systems literature. Most of them have taken the pro - acceptance view. Undesirably, information technologies often provoke users' reactance or resistance. This paper explores one of the negative reactions -psychological reactance. The present paper studies the effects of the users' perception of threatened freedom and personalization degree on intention to use recommendation services. High personalization can be a major motivation for users to accept recommendation systems. However recommendation services are a two-edged sword, which not only provides users the efficiency of decision making but also poses threats to free choice. When people consider that their freedom is reduced or threatened by others, they experience the motivational state to restore the freedom. This motivational state must be considered in understanding usage of information systems, especially personalized services which are designed for persuasion or compliance. This paper empirically investigates the effect of personalization and the psychological reactance on the intention to use information systems in the personalized recommendation context. Users' perception of personalization increases the usefulness of recommendation service while their perception of threat to freedom reduces the intention to use personalized recommendation service. Findings and implications are discussed.

• Journal of Information Processing Systems
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• 제17권2호
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• pp.369-384
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• 2021

In a personalized product recommendation system, when the amount of log data is large or sparse, the accuracy of model recommendation will be greatly affected. To solve this problem, a personalized product recommendation method using deep factorization machine (DeepFM) to analyze user behavior is proposed. Firstly, the K-means clustering algorithm is used to cluster the original log data from the perspective of similarity to reduce the data dimension. Then, through the DeepFM parameter sharing strategy, the relationship between low- and high-order feature combinations is learned from log data, and the click rate prediction model is constructed. Finally, based on the predicted click-through rate, products are recommended to users in sequence and fed back. The area under the curve (AUC) and Logloss of the proposed method are 0.8834 and 0.0253, respectively, on the Criteo dataset, and 0.7836 and 0.0348 on the KDD2012 Cup dataset, respectively. Compared with other newer recommendation methods, the proposed method can achieve better recommendation effect.