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A good QoE, especially when measured as engagement, is an important optimization goal for investors and advertisers. Therefore, many works have focused on understanding how the factors, especially quality of service (QoS) factors, impact user engagement. However, the divergence of user interest is usually ignored or deliberatively decoupled from QoS and\/or other objective factors. With an increasing trend towards personalization applications, it is necessary as well as feasible to consider user interest to satisfy aesthetic and personal needs of users when optimizing user engagement. We first propose an<jats:italic>Extraction-Inference (E-I)<\/jats:italic>algorithm to estimate the user interest from easily obtained user behaviors. Based on our empirical analysis on a large\u2010scale dataset, we then build a<jats:italic>QoS and user Interest based Engagement (QI-E) regression model<\/jats:italic>. Through experiments on our dataset, we demonstrate that the proposed model reaches an improvement in accuracy by 9.99% over the baseline model which only considers QoS factors. The proposed model has potential for designing QoE\u2010oriented scheduling strategies in various network scenarios, especially in the fog computing context.<\/jats:p>","DOI":"10.1155\/2018\/1398958","type":"journal-article","created":{"date-parts":[[2018,9,23]],"date-time":"2018-09-23T23:30:35Z","timestamp":1537745435000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["An Engagement Model Based on User Interest and QoS in Video Streaming Systems"],"prefix":"10.1155","volume":"2018","author":[{"given":"Xiaoying","family":"Tan","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6017-5625","authenticated-orcid":false,"given":"Yuchun","family":"Guo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mehmet A.","family":"Orgun","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liyin","family":"Xue","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yishuai","family":"Chen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2018,9,23]]},"reference":[{"key":"e_1_2_11_1_2","doi-asserted-by":"publisher","DOI":"10.1145\/2505805"},{"key":"e_1_2_11_2_2","doi-asserted-by":"crossref","unstructured":"BalachandranA. 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