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Algorithms for answering queries using views have been used to integrate information from multiple sources. The bucket algorithm, predominantly used to reformulate queries, has two drawbacks. It generates a large number of candidate solutions, even when the number of sound solutions is small, and then checks for their soundness using an exponential conjunctive-query-containment test. Leser 1] p...

Evidence from sign language strongly supports three positions: (1) language is a coherent system with universal properties; (2) sign languages diverge from spoken languages in some aspects of their structure; and (3) domain-external factors can be identified that account for some crucial aspects of language structure -- uniform and diverse -- in both modalities. Assuming that any of these posit...

OpenID, a standard for Web single sign-on, has been gaining popularity both with Identity Providers, Relying Parties, and users. This paper collects the security issues in OpenID found by others, occasionally extended by the authors, and presents them in a uniform way. It attempts to combine the shattered knowledge into a clear overview. The aim of this paper is to raise awareness about securit...