Abstract. Search facilities are vital for folksonomy (or social tagging mechanism) based systems. Although these systems allow great malleability and adaptability, they also surfer...
Physical leisure activities such as table tennis provide healthy exercise and can offer a means to connect with others socially; however, players have to be in the same physical l...
We propose a new approach to ensure privacy in location based services, without requiring any support from a"trusted" entity. We observe that users of location based ser...
This paper is a report on early user activity in Many Eyes, a public web site where users may upload data, create visualizations, and carry on discussions. Since the site launched...
This article describes a geographical study on the usage of a search engine, focusing on the traffic details at the level of countries and continents. The main objective is to un...
Ricardo A. Baeza-Yates, Christian Middleton, Carlo...