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As a prevalent type of Web advertising, contextual advertising refers to the placement of the most relevant ads into a Web page, so as to increase the number of ad-clicks. However, some problems of homonymy and polysemy, low intersection of keywords etc., can lead to the selection of irrelevant ads for a page. In this paper, we present a new contextual(More)
In medical information systems, there are a lot of confidential information about patient privacy. It is therefore an important problem how to prevent patient’s personal privacy information from being disclosed. Although traditional security protection strategies (such as identity authentication and authorization access control) can well ensure data(More)
The Capsule Reviews are intended to provide a short succinct review of each paper in the issue in order to bring it to a wider readership. The Capsule Reviews were compiled by Fairouz Kamareddine. The authors argue that the capability to quickly find the correct answer for a specific question is crucial to every organization but that most of the information(More)
The rapid increase of multimedia data makes multimedia query more and more important. To better satisfy users' query requirements, developing a functional multimedia query language is becoming a promising and interesting task. In this paper, we propose a graphical multimedia query language called GMQL, which is developed based on a semi-structured data(More)
Data privacy and security Encryption Two-phase query Characteristic index a b s t r a c t Rapid advances in the networking technologies have prompted the emergence of the ''software as ser-vice'' model for enterprise computing, moreover, which is becoming one of the key industries quickly. ''Database as service'' model provides users power to store, modify(More)
In the social annotation systems, users annotate digital data sources by using tags which are freely chosen textual descriptions. Tags are used to index, annotate and retrieve resource as an additional metadata of resource. Poor retrieval performance remains a major challenge of most social annotation systems resulting from several problems of ambiguity,(More)