Rich Thompson

Learn More
In this paper, we apply stacking, an ensemble learning method, to the problem of building hybrid recommendation systems. We also introduce the novel idea of using runtime metrics which represent properties of the input users/items as additional meta-features, allowing us to combine component recommendation engines at runtime based on user/item(More)
This paper presents a taxonomy of recommender systems with the goal of assisting in selection and application of these systems. Recommendation methods are usually classified into three main categories: collaborative,contentbased, and knowledge-based. We outline a taxonomy of recommender systems based on problem characteristics and the underlying technology.(More)
Ptarmigan is the tactical area communications system now in use with the British Army. Included in its capabilities is the extension of full service features to mobile subscribers. This paper outlines the Ptarmigan system, concentrating on the access for mobile users and describing the subsystem control features and unique VHF radio design. A summary is(More)
  • 1