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On many photo-sharing social media, e.g., Instagram, a user posting a photo can add tags, i.e., words describing it. Tags are used for keyword-based image search. Some tags, however, describe not image contents but some metadata, e.g., camera names. We ...

To delivery static contents, Content Delivery Networks (CDNs) are an effective solution, but that shows its

limits in dynamic and large systems with centralized approach. Decentralized algorithms and protocols can

be usefully employed to tackle this ...

Contents Delivery Networks (CDNs) have been introduced to deliver efficiently very large content to user with low cost. For this, various content delivery schemes such as the uncooperative pull-based scheme, the cooperative push-based scheme, and the ...