We describe a new network service, the “ticket server”. This service provides “tickets” that a client can attach to a request for a network service (such as sending email o...
Abstract. Aspects have emerged as a powerful tool in the design and development of systems, allowing for the encapsulation of program transformations. The dynamic semantics of aspe...
We study auctions in which bidders have severe constraints on the size of messages they are allowed to send to the auctioneer. In such auctions, each bidder has a set of k possible...
The paper describes initial results in an ongoing project aimed at providing and analyzing standardized, representative data sets for typical context recognition tasks. Such data ...
Ernst A. Heinz, Kai S. Kunze, Stefan Sulistyo, Hol...
Non-negative matrix factorization (NMF) is an excellent tool for unsupervised parts-based learning, but proves to be ineffective when parts of a whole follow a specific pattern. ...