Detecting Leaders to Alleviate Latency in Recommender Systems

SCOL: similarity and credibility-based approach for opinion leaders detection in collaborative filtering-based recommender systems

“…From Table 11, it can be seen that in Brun et al (2011a), Arulselvan (2008) and Fan and Pardalos (2010), and in our approach, we use a social network by focusing on the collaboration of users and their relationships, however, the approaches described in Esslimani et al (2010Esslimani et al ( , 2013 and Brun et al (2011a) do not use a social network as the first focus on a behavioural network by identifying the behavioural leaders, and the second concerns the experience and trust of users. Similarity between users has been used in Esslimani et al (2010Esslimani et al ( , 2013 and Arulselvan (2008), and in our approach, to assess the degree of approximation between users. Furthermore, in Brun et al (2011a), Arulselvan (2008), Fan and Pardalos (2010) and Esslimani et al (2010Esslimani et al ( , 2013, and in our approach, we use centrality measure since leaders has influential links with other users.…”

“…Similarity between users has been used in Esslimani et al (2010Esslimani et al ( , 2013 and Arulselvan (2008), and in our approach, to assess the degree of approximation between users. Furthermore, in Brun et al (2011a), Arulselvan (2008), Fan and Pardalos (2010) and Esslimani et al (2010Esslimani et al ( , 2013, and in our approach, we use centrality measure since leaders has influential links with other users.…”

“…Proposed and rated items have been taken into account in [Esslimani et al (2010[Esslimani et al ( , 2013, Al-Sharawneh and Williams (2010), Brun et al (2011a), Arulselvan (2008) and Fan and Pardalos (2010), and in our approach, as a CFS is based on items recommendation. The latter approaches, except Al-Sharawneh and Williams (2010), have additionally indicated that most important leaders play a crucial role in terms of connectivity of the network.…”

“…Our approach permits, additionally, to identify the set of key users at the same time. Furthermore, Al-Sharawneh and Williams (2010), Brun et al (2011a) and Arulselvan (2008) aim to alleviate the cold start user problem in CFS, and Esslimani et al (2010Esslimani et al ( , 2013 aims to solve cold start items problem, while our SCOL approach focuses on both new user and item challenges.…”

“…Moreover, the cold start item problem focuses on the arrival of a new item to the catalogue as it cannot be recommended because it has no ratings yet. Indeed, when a new item is entered in the system, the ratings relating to this item are not available because no user has assigned a rating yet (Esslimani et al, 2010;Billsus and Pazzani, 2000).…”