The adequacy of user models depends mainly on the accuracy and precision of information that is retrieved to the user. The real challenge in user modelling studies is due to the inadequacy of data, improper use of techniques, noise within the data and imprecise nature of human behavior. For the best results of user modelling, one should choose an appropriate way to do it i.e. by selecting the b...

This paper proposes suitable characteristics of an ideal Visual Information Retrieval (VIR) system. The central role of user modelling in such a system is discussed. Approaches to the automated analysis of images in image retrieval systems are considered. A preliminary sketch of the model is then provided. The model is based on Bayesian user modelling techniques and dynamic Bayesian Networks. A...

User profiles or user models are crucial in many areas in which it is essential to obtain knowledge about users of software applications such as data warehouse technologies. To enhance the personalized services, group profiles are derived through combining individual user profiles in order to represent group modelling. In this paper, we propose a new representation of group profiles in OLAP con...

Adaptive hypermedia (AH) systems that adapt themselves to the user’s characteristics generally include for this purpose a user model component. The designer has to specify different solutions for content, navigation and presentation, and define adaptation criteria. To support the development of AH applications an engineering approach is required that considers user modelling and adaptive aspect...

User modelling is a key element in successfully assisting intelligence analysts who must gather information and make decisions without being overloaded by the massive amounts of data available on a daily basis most of which are irrelevant. Furthermore, with user modelling, we can predict the goals and intentions of the analyst in order to better serve their information seeking tasks by providin...

We will introduce ScIML, a domain specific language for voice user interface (VUI) creation that is based on the generic expressive means of the Unified Modelling Language. In particular, we employ UML statecharts for interaction flow modelling.

We present a new approach that makes use of the embedded structural information of the documents that a user frequently refers to for deriving a personalized concept hierarchy and for identifying user preferences concerning document searching and browsing. In contrast with conventional methods that ignore the distribution of structural elements, our approach accepts semantic clues defined in th...

User authentication can be compromised both by subverting the system and by subverting the user; the threat modelling of the former is well studied, the latter less so. We propose a method to determine opportunities to subvert the user allowing vulnerabilities to be systematically identified. The method is applied to VeriSign’s OpenID authentication mechanism.

In this paper a new system for piecewise primitive surface recovery on point clouds is presented, which allows a novice user to sketch areas of interest in order to guide the fitting process. The algorithm is demonstrated against a benchmark technique for autonomous surface fitting, and, contrasted against existing literature in user guided surface recovery, with empirical evidence. It is concl...

The notion of profile appeared in the 1970s decade, which was mainly due to the need to create custom applications that could be adapted to the user. In what follows, we treat the different aspects of the user’s profile, defining it, profile, its features and its indicators of interest, and then we describe the different approaches of modelling and acquiring the user’s interests.