Virtual communities become more and more heterogeneous as their scale increases. This implies that, rather than being a single, homogeneous community, they become a collection of knots (or sub-communities) of users. For the computation of a member’s reputation to be useful, the system must therefore identify the community knot to which this member belongs and to interpret its reputation data co...

We consider reputation systems where users are allowed to rate products that they purchased previously. To obtain trustworthy reputations, they are allowed to rate these products only once. As long as they do so, the users stay anonymous. Everybody is able to detect users deviating from the rate-products-only-once policy and the anonymity of such dishonest users can be revoked by a system manag...

We consider reputation systems where users are allowed to rate products that they purchased previously. To obtain trustworthy reputations, they are allowed to rate these products only once. As long as they do so, the users stay anonymous. Everybody is able to detect users deviating from the rate-products-only-once policy and the anonymity of such dishonest users can be revoked by a system manag...

We propose a novel generic reputation bootstrapping framework for composite services. Multiple reputation-related indicators are considered in layer-based to implicitly reflect the of component The importance an indicator on future performance service is learned using modified Random Forest algorithm. topology-aware Deep Neural Network (fDNN) find correlations between and trained fDNN model pre...

The purpose of this study is to examine altruistic behavior (altruism) and egotistic behavior (reciprocity and reputation) regarding online group repurchasing intention. Data collected from 282 online group shoppers in an online shopping store provided support for the proposed model. The findings of the study shows that altruism is relevant to online group buying, and trust and satisfaction hav...

In this paper I investigate terror groups' survival. The fate of terrorists hinges heavily on the power group derives from its reputation. reputation, which depends policies and actions takes within their constituency, determines degree to each can find recruits, resources, support for cause. contend that groups investing positive or negative reputation constituency— people they claim represent...