Browsing by Author "Siewe, Francois"
Now showing items 21-40 of 90
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Context-Aware and Adaptive Usage Control Model
Almutairi, Abdulgader; Siewe, Francois (Book)Producing an adaptive usage control model that is compatible with UbiComp environments is a challenging task. A ubicomp system must be able to adapt its behavior based on its environment. Thus, it must respond to change ... -
Context-aware Cloud Computing for Personal Learning Environment
Chen, Feng; Al-Bayatti, Ali Hilal; Siewe, Francois (Book chapter)Virtual learning means to learn from social interactions in a virtual platform that enables people to study anywhere and at any time. Current Virtual Learning Environments (VLEs) are a range of integrated web based ... -
Deriving Real-Time Programs from Duration Calculus Specifications
Siewe, Francois; Van Hung, Dang (Technical Report)In this paper we present a syntactical approach for deriving real-time programs from a formal specification of the requirements of real-time systems. The main idea of our approach is to model discretization at state ... -
Deriving real-time programs from duration calculus specifications.
Siewe, Francois; Hung, D. V. (Conference)In this paper we present a syntactical approach for deriving real-time programs from a formal specification of the requirements of real-time systems. The main idea of our approach is to model discretization at state ... -
Description Logic Based Icons Semantics: An Ontology for Icons
Kuicheu, Nathalie Cindy; Wang, N.; Fanzou, G. N.; Siewe, Francois; Xu, D. (Conference)Iconic communication is paramount today in order to assist people with disability (e.g. illiteracy) enjoying, as much as everybody else, the advances in information and communication technologies (e.g. Internet). Previous ... -
Development of Secure Systems: A Compositional Approach
Siewe, Francois (Book)Information security is critical to economies, communities, governments, social networking and safety of citizens. With the advent of the Internet and the rapid development of Internet-based application such as e-commerce, ... -
A Distance Measure between Labeled Combinatorial Maps
Wang, Tao; Dai, Gujun; Ni, Bingbing; Xu, De; Siewe, Francois (Article)Combinatorial maps are widely used in image representation and processing, however map matching problems have not been extensively researched. This paper addresses the problem of inexact matching between labeled combinatorial ... -
Dynamic Access Control Policies - Specification and Verification
Janicke, Helge; Cau, A. (Antonio); Siewe, Francois; Zedan, Hussein (Article)Security requirements deal with the protection of assets against unauthorized access (disclosure or modification) and their availability to authorized users. Temporal constraints of history-based access control policies ... -
Dynamic access control policies and web-service composition.
Siewe, Francois; Janicke, Helge; Jones, Kevin (Conference)Service composition is a fundamental technique for develop- ing web-service applications. In general, a single service is not enough to achieve the user’s goal, rather several services, often from different providers, ... -
An Efficient Approach for Realizing RCCAR to Resolve Context Conflicts in Context-Aware Systems Using Influential Context Elements
Al-Shargabi, Asma Abdulghani Qassem; Siewe, Francois (Conference)The first step for determining the quality of context (QoC) in context aware systems (CASs) is to make sure that there are no conflicts among the values of each context element collected from different resources/sensors. ... -
Enforcement of CA-UCON Model
Almutairi, Abdulgader; Siewe, Francois (Conference)A Context-Aware Usage CONtrol (CA- UCON) model is an extension of the traditional UCON model which enable adaptation to environmental changes in the aim of preserving continuity of access. When the authorisations ... -
Enforcement of CA-UCON Model
Almutairi, Abdulgader; Siewe, Francois (Article)A Context-Aware Usage CONtrol (CA- UCON) model is an extension of the traditional UCON model which enable adaptation to environmental changes in the aim of preserving continuity of access. When the authorisations and ... -
Extend the UTAUT to Measure the Adoption of On-line Shopping in Saudi Environment
Alsharif, Faisal; Siewe, Francois; Fidler, Christine; Bella, Giampaolo (Conference)Due to the growing importance of electronic commerce and on-line shopping economically and socially in people's lives, the researchers took interest in conducting several studies in order to identify the factors that urges ... -
An Extension of Class Diagram to Model the Structure of Context-Aware Systems
Al-alshuhai, Ahmed; Siewe, Francois (Conference)Context-aware systems (CASs) have become a reality thanks to the development of smart software and hardware to assist the users in various real life activities. The proliferation of context-aware services has led to the ... -
An Extension of the UML Activity diagram to model the behaviour of Context Aware Systems
Al-alshuhai, Ahmed; Siewe, Francois (Conference)The main characteristics of context-aware systems are their ability to sense perpetually the context of the user and adapt their behavior accordingly in response to changes the user's context. Modularity is an important ... -
An Extension of the Use Case Diagram to Model Context-aware Applications
Al-alshuhai, Ahmed; Siewe, Francois (Conference)Context-aware applications have the ability to sense the context of the user and use the sensed context information to make adaptation decision in response to changes in the user’s context. Hence, besides the functional ...