Access to real environments is often conditioned by a number of issues, including the skills of the user (i.e. affected by aging, physical and psychological deficiencies, etc.) an...
The analysis of user behavior on the Web presupposes a reliable reconstruction of the users' navigational activities. Cookies and server-generated session identifiers have be...
As stated in the Web Content Accessibility Guidelines, it is extremely important to provide clear and consistent navigation mechanisms to increase the likelihood that a person wil...
Although some guidelines (e.g., based on architectural principles) have been proposed for designing Virtual Environments (VEs), several usability problems can be identified only b...
Tagging has emerged as a powerful mechanism that enables users to find, organize, and understand online entities. Recommender systems similarly enable users to efficiently navig...