Book Chapters

Permanent URI for this collectionhttp://dl.cerist.dz/handle/CERIST/24

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Start date: 2010End date: 2016

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Now showing 1 - 10 of 14
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    Design of Wearable Health Monitoring Systems: An Overview of Techniques and Technologies&
    (Springer International Publishing, 2016) Boulemtafes, Amine; Badache, Nadjib
    Because of the increasing costs of healthcare, wearable health monitoring systems (WHMS) are catching a lot of attention of the research community. Such systems are more and more propelled by advances in technology such as miniaturization, sensing devices and wireless communications. This study aims to review and synthesis the main implementation techniques and technologies used to design WHM Systems on the basis of the typical WBAN three-tiers architecture where the Body Area Network (BAN) represents the key infrastructure of such systems.
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    Architecting the Internet of Things: State of the Art
    (Springer International Publishing, 2016) Abdmeziem, Mohammed Riyadh; Tandjaoui, Djamel; Romdhani, Imed
    Internet of things (IoT) constitutes one of the most important technological development in the last decade. It has the potential to deeply affect our life style. However, its success relies greatly on a well-defined architecture that will provide scalable, dynamic, and secure basement to its deployment. In fact, several challenges stand between the conceptual idea of IoT, and the full deployment of its applications into our daily life. IoT deployment is closely related to the establishment of a standard architecture. This architecture should support future extensions, and covers IoT characteristics such as distributivity, interoperability, and scalability. A well defined, scalable, backward compatible, and secure architecture is required to bring the IoT concept closer to reality. In the literature, several architectures have been proposed. Nevertheless, each architecture brings a share of drawbacks, and fails covering all IoT characteristics. In this chapter, we review the main proposed architectures for the Internet of Things, highlighting their adequacy with respect to IoT requirements. Firstly, we present IoT building blocks. Then, we introduce the high level architecture of IoT before diving into the details of each proposed architecture. In addition, we introduce a classification of the reviewed architectures based on their technical aspects, and their ability to match IoT characteristics. Finally, based on the main shortcomings of the proposed architectures, we conclude with some design ideas for shaping the future IoT.
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    Wearable Health Monitoring Systems: An Overview of Design Research Areas
    (Springer International Publishing, 2016) Boulemtafes, Amine; Badache, Nadjib
    In order to be effective and helping towards improving quality of living of people, design and development of wearable health monitoring systems needs to satisfy a number of medical and non-medical criteria’s while taking in consideration resource limitations and fulfilling ergonomic constraints. This study with the aim to serve as a quick reference for future works, attempts to cover main research areas including requirements, challenges and tradeoffs related to the design of such systems.
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    Providing Reliability for Transactional Mobile Agents
    (Vincent Guyot, 2013) Zeghache, Linda; Hurfin, Michel; Moise, Izabela; Badache, Nadjib
    A transactional agent is a mobile agent that migrates from a site to another one in order to execute a distributed transaction assigned by a user. Works on transactional mobile agents have identified two prob- lems that can not be solved by the agent alone. The first one is related to the reliability. The lack of a fault tolerant infrastructure and method- ologies that address fault tolerant execution of mobile agents highlights a major drawback of this technology. The second problem for which the agent needs assistance is related to the atomic validation of the transac- tion. In this paper we address the mobile agent fault tolerance and the transactional support
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    An Ω-Based Leader Election Algorithm for Mobile Ad Hoc Networks
    (Springer Berlin Heidelberg, 2012) Melit, Leila; Badache, Nadjib
    Leader election is a fundamental control problem in both wired and wireless systems. The classical statement of the leader election problem in distributed systems is to eventually elect a unique leader from a fixed set of nodes. However, in MANETS, many complications may arise due to frequent and unpredictable topological changes. This paper presents a leader election algorithm based on the omega failures detector, where inter-node communication is allowed only among the neighboring nodes along with proofs of correctness. This algorithm ensures that every connected component of the mobile ad hoc network will eventually elect a unique leader, which is the node of the highest priority value from among all nodes within that connected component. The algorithm can tolerate intermittent failures, such as link failures, network partitions, and merging of connected network components.
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    Semantic Annotations and Context Reasoning to Enhance Knowledge Reuse in e-Learning
    (Springer Berlin Heidelberg, 2013) Boudebza, Souad; Berkani, Lamia; Azouaou, Faiçal; Nouali, Omar
    We address in this paper the need of improving knowledge reusability within online Communities of Practice of E-learning (CoPEs). Our approach is based on contextual semantic annotations. An ontological-based contextual semantic annotation model is presented. The model serves as the basis for implementing a context aware annotation system called “CoPEAnnot”. Ontological and rule-based context reasoning contribute to improving knowledge reuse by adapting CoPEAnnot’s search results, navigation and recommendation.The proposal has been experimented within a community of learners.
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    A Formal Approach for a Self Organizing Protocol Inspired by Bacteria Colonies: Production System Application
    (Springer Berlin Heidelberg, 2010) Mellah, Hakima; Hassas, Salima; Drias, Habiba; Raiah, A.; Tiguemoumine, A.
    Any dysfunction in production system (PS) is likely to be very expensive; so modelling by Multi Agent Systems (MAS) makes the production system (PS) possible to have aspects of robustness, reactivity and flexibility, which allow the PS control to be powerful and to react to all the risks being able to occur. In order to have a fault-tolerant PS, we propose when and how to recourse to a self organizing protocol making the MAS capable of changing its communication structure or organization, and thus reorganizing itself without any external intervention.
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    Tags Weighting Based on User Profile
    (Springer Berlin Heidelberg, 2011) Kichou, Saida; Mellah, Hakima; Amghar, Youssef; Dahak, Fouad
    The ’Collaborative Tagging’ is gaining popularity on Web 2.0, this new generation of Web which makes user reader/writer. The ’Tagging’ is a mean for users to express themselves freely through additions of label called ’Tags’ to shared resources. One of the problems encountered in current tagging systems is to define the most appropriate tag for a resource. Tags are typically listed in order of popularity, as del-icio-us. But the popularity of the tag does not always reflect its importance and representativeness for the resource to which it is associated. Starting from the assumptions that the same tag for a resource can take different meanings for different users, and a tag from a knowledgeable user would be more important than a tag from a novice user, we propose an approach for weighting resource’s tags based on user profile. For this we define a user model for his integration in the tag weight calculation and a formula for this calculation, based on three factors namely the user, the degree of approximation between his interest centers and the resource field, expertise and personal assessment for tags associated to the resource. A resource descriptor containing the best tags is created.
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    Multi-Agent Liquidity Risk Management in an Interbank Net Settlement System
    (Springer Berlin Heidelberg, 2012) Hedjazi Dellal, Badiâa; Ahmed-Nacer, Mohamed; Aknine, Samir; Benatchba, Karima
    A net settlement system is a payment system between banks, where a large number of transactions are accumulated, usually waiting until the end of each day to be settled through payment instruments like: wire transfers, direct debits, cheques, .... These systems also provide clearing functions to reduce interbank payments but are sometimes exposed to liquidity risks. Monitoring, and optimizing the interbank exchanges through suitable tools is useful for the proper functioning of these systems. The goal is to add to these systems an intelligent software layer integrated with the existing system for the improvement of transactions processing and consequently avoid deadlock situations, deficiencies and improve system efficiency. We model and develop by multi-agent an intelligent tracking system of the interbank exchanged transactions to optimize payments settlement and minimize liquidity risks.
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    Reducing Thread Divergence in GPU-Based B&B Applied to the Flow-Shop Problem
    (Springer Berlin Heidelberg, 2012) Chakroun, Imen; Bendjoudi, Ahcène; Melab, Nouredine
    In this paper,we propose a pioneering work on designing and programming B&B algorithms on GPU. To the best of our knowledge, no contribution has been proposed to raise such challenge. We focus on the parallel evaluation of the bounds for the Flow-shop scheduling problem. To deal with thread divergence caused by the bounding operation, we investigate two software based approaches called thread data reordering and branch refactoring. Experiments reported that parallel evaluation of bounds speeds up execution up to 54.5 times compared to a CPU version.