Nowadays, numerous journals and conferences have published articles related to context-aware systems, indicating many researchers’ interest. Therefore, the goal of this paper is to review the works that were published in journals, suggest a new classification framework of context-aware systems, and explore each feature of classification framework. This paper is based on a literature review of c...

Contextual data of learners play a vital role in various e-learning applications in recent years, as learning contexts not only provide learners with context-aware services but also enhance effectiveness. However, various e-learning systems adopt different contextual models (i.e., application-dependent contextual model), and consequently data sharing and system integration are challenging. In t...

Pervasive Computing refers to a seamless and invisible computing environment which provides dynamic, proactive and context-aware services to the user by acquiring context knowledge from the environment and composing available services. In this paper, we demonstrate how heterogeneous Web services can be made interoperable and used to support Pervasive Computing. We present an architecture how a ...

Ubiquitous computing applications must have access to context information to provide context-aware services. The literature reports on applications that process and store context information as part of their functionality and also on reusable infrastructures dedicated to capturing, storing and processing context information. We advocate that infrastructures aimed at supporting context-aware app...

Location based services (LBS) are a specific instance of a broader class of Internet services that are predicted to become popular in a near future: context-aware services. The privacy concerns that LBS have raised are likely to become even more serious when several context data, other than location and time, are sent to service providers as part of an Internet request. This paper provides a cl...

We propose a novel security notion for public-key encryption schemes – ciphertext undetectability. Informally, an encryption scheme has the property of ciphertext undetectability, if the attacker is unable to distinguish between valid and invalid ciphertexts. We compare this notion with the established ones, such as indistinguishability of ciphertexts and plaintext awareness. We analyze the pos...

In recent years there has been research on context-aware mobile services that have supported e.g. making appropriate calls, being aware of others, and going on a guided tour. However, there is a lack of user studies that could show that others than engineers and researchers themselves need those services. Therefore, in this paper we will present the results of an observational study on teenage ...

Generating event logs from nonprocess-aware systems enabling business process mining Ricardo Pérez-Castillo a , Barbara Weber b , Jakob Pinggera b , Stefan Zugal b , Ignacio García-Rodríguez de Guzmán a & Mario Piattini a a Alarcos Research Group, University of Castilla-La Mancha, Paseo de la Universidad 4, 13071, Ciudad Real, Spain b Quality Engineering, University of Innsbruck, Technikerstraß...

This article presents an approach to context-aware services for “smart buildings” based on Web and Semantic Web techniques. The services striven for are first described, then their realization using Web and Semantic Web services is explained. Finally, advantages of the approach are stressed.