• A framework for object classification in farfield videos 

    Setitra, Insaf; Larabi, Slimane
    In : Rapports de recherche internes, (CERIST, Alger, 2014-10-26)
    Object classification in videos is an important step in many applications such as abnormal event detection in video surveillance, traffic analysis is urban scenes and behavior control in crowded locations. In this work, propose a framework for moving object classification in farfield videos. Much works have been dedicated ...
  • A framework for space-efficient read clustering in metagenomic samples 

    Alanko, Jarno; Cunial, Fabio; Belazzougui, Djamal; Mäkinen, Veli
    In : (BioMed Central, 2017-03-14)
    Background: A metagenomic sample is a set of DNA fragments, randomly extracted from multiple cells in an environment, belonging to distinct, often unknown species. Unsupervised metagenomic clustering aims at partitioning a metagenomic sample into sets that approximate taxonomic units, without using reference genomes. ...
  • A Framework for Space-Efficient String Kernels 

    Belazzougui, Djamal; Cunial, Fabio
    In : (Springer, 2017-02-17)
    String kernels are typically used to compare genome-scale sequences whose length makes alignment impractical, yet their computation is based on data structures that are either space-inefficient, or incur large slowdowns. We show that a number of exact kernels on pairs of strings of total length n, like the k-mer kernel, ...
  • A Framework for Usage-based Document Reengineering 

    Sadallah, Madjid; Encelle, Benoît; Maredj, Azze-Eddine; Prié, Yannick
    In : 13th ACM symposium on Document engineering DocEng 2013, (ACM New York, NY, USA, Florence, Italy, 2013-09)
    This ongoing work investigates usage-based document reengineering as a means to support authors in modifying their documents. Document usages (i.e. usage feedbacks) cover readers' explicit annotations and their reading traces. We first describe a conceptual framework with various levels of assistance for document ...
  • A generic formal model for fission of modalities in output multi-modal interactive systems 

    Mohand Oussaïd, Linda; Ait Ameur, Yamine; Ahmed-Nacer, Mohamed
    In : International Workshop on Verification and Evaluation of Computer and Communication Systems, (Rabat, Maroc, 2009)
    Output multi-modal human-machine interfaces combine semantically output medias and modalities in order to increase interaction machine capabilities. The aim of this paper is to present a formal model supporting formal specifications of output multi-modal interactive systems. As a consequence, the expected usability ...
  • A Generic Framework for Remote Practicals: Application to Computer Science and early feedbacks 

    Bouabid, Mohamed Amine
    In : Rapports de recherche internes, (CERIST, Alger, 2012)
    In this paper we present a model-driven based framework to guide efficiently the design and integration of remote computer experiments into distant learning curricula taking into the account the related educational considerations (especially efficient online teamwork and tutoring support). Our approach is centered on a ...
  • A Generic Model-driven Architecture for Online Lab-works: Application to Computer Science 

    Bouabid, Mohamed Amine; Vidal, Phillipe; Broisin, Julien
    In : Rapports de recherche internes, (CERIST, Alger, 2012-04)
    In this paper we present a model-driven engineering approach to transparently and efficiently integrate remote computer experiments into distant learning curriculums. The originality of this framework stands on a middleware layer linking between existing Learning Management Systems and remote laboratories. Based on ...
  • A Graph Approach for Enhancing Process Models Matchmaking 

    Belhoul, Yacine; Yahiaoui, Saïd
    In : Rapports de recherche internes, (CERIST, Alger, 2015-04)
    Recent attempts have been done to measure similarity of process models based on graph-edit distance. This problem is known to be difficult and computational complexity of exact algorithms for graph matching is exponential. Thus, heuristics should be proposed to obtain approximations. Spectral graph matching methods, in ...
  • A Java-Web-Based-Learning Methodology, Case Study : Waterborne diseases 

    Benmeziane, Souad; Aliane, Hassina; Allouti, F.; Khelalfa, H. M.
    In : Revue d'Information Scientifique et Technique (RIST), (CERIST, Alger, 2001)
    Les développements récents des technologies Web ont fait émerger de nouvelles approches pour l’enseignement assisté par ordinateur. En effet, l’apprenant peut apprendre indépendamment des contraintes de temps et de lieu. Plusieurs systèmes basés sur le Web ont été développés. Cependant, ils demeurent limités : ils ne ...
  • A Layered Architecture for online Lab-works: Experimentation in the Computer Science Education 

    Bouabid, Mohamed Amine; Vidal, Phillipe; Broisin, Julien
    In : Rapports de recherche internes, (CERIST, Alger, 2012)
    Practical competencies are key components of any computing education curriculum. Today, several computer experiment tools exist, however, these tools are originally intended to experts, and do not integrate very well into the existing online learning environments, in particular, they lack efficient support for teamwork, ...
  • A Lightweight Key Management Scheme for E-health applications in the context of Internet of Things 

    Abdmeziem, Riad; Tandjaoui, Djamel
    In : Rapports de recherche internes, (CERIST, Alger, 2014-03-15)
    In the context of Internet of Things where real world objects will automatically be part of the Internet, ehealth applications have emerged as a promising approach to provide unobtrusive support for elderly and frail people based on their situation and circumstances. However, due to the limited resource available ...
  • A MOF-based Social Web Services Description Metamodel 

    Benna, Amel; Maamar, Zakaria; Ahmed-Nacer, Mohamed
    In : Rapports de recherche internes, (CERIST, Alger, 2015-12-09)
    To make IT community adopt social Web services, both social Web service-based applications and their support platforms should evolve independently from each other while sharing a common model that represent the characteristics of these social Web services. This paper proposes a model-driven approach that achieves this ...
  • A new graph coloring and Fibonacci number 

    Harik, Hakim; Belbachir, Hacène
    In : Rencontre d'Analyse Mathématique et ses Applications, (Tipaza, Algérie, 2012-11-26)
    In this paper, we introduce a new notion of a graph coloring. This notion will be used to prouve some identities involving Fibonacci number.
  • A New Low Cost Sessions-Based Misbehaviour Detection Protocol (SMDP) for MANE 

    Djenouri, Djamel; Fahad, Tarek; Askwith, Robert; Merabti, Madjid
    In : 21st International Conference on Advanced Information Networking and Applications Workshops (AINAW), (IEEE Computer Society, Niagara Falls, Ontario, Canada, 2007-05)
    There is a strong motivation for a node to deny packet forwarding to others and being selfish in MANET. Recently, some solutions have been proposed, but almost all of these solutions rely on the watchdog technique, which suffers from many drawbacks, particularly when using the power control technique. To overcome this ...
  • A Novel Approach for Selfish Nodes Detection in MANETs: Proposal and Petri Nets Based Modeling 

    Djenouri, Djamel; Badache, Nadjib
    In : 8th IEEE International Conference on Telecommunications, ConTEL, (IEEE, Zagreb, Croatia, 2005-06)
    The resource limitation of nodes used in selforganized ad hoc networks, along with the multi-hop nature of these networks, may cause a new behavioral phenomena which does not exist in traditional infrastructured environments. To save its energy, a node may behave sel shly, then it would not forward packets for other ...
  • A Novel transport protocol for wireless mesh networks 

    Kafi, Mohamed Amine; Tandjaoui, Djamel
    In : International Conference on Information Technology and e-Services, (Journal of Networking Technology, Sousse, Tunisia, 2011-04-10)
    Throughput is the main concern in Wireless Mesh Networks (WMNs). The standard congestion control mechanism of TCP[7] is not able to handle the special properties of a shared wireless multi-hop channel well. Given that the unreliable wireless links and congestion are likely to be the source of throughput degradation in ...
  • A Parallel P2P Branch-and-Bound Algorithm for Computational Grids 

    Bendjoudi, Ahcène; Melab, Nouredine; Talbi, El-Ghazali
    In : International Confernce on Cluster Computing and the Grid (CCGRID), (Rio de Janeiro - Brasil, 2007-05-14)
    Solving exactly Combinatorial Optimization Problems (COPs) using a Branch-and-Bound algorithm requires a huge amount of computational resources. The efficiency of such algorithm can be improved by distributing at large scale the computation required by the exploration of the search tree. In this paper, we propose ParallelBB, ...
  • A policy-based context-aware approach for the commitment of mobile transactions 

    Nouali-Taboudjemat, Nadia; Drias, Habiba
    In : NOTERE '08 Proceedings of the 8th international conference on New technologies in distributed systems, (ACM, Lyon, France, 2008)
    The transaction paradigm ensures consistency in the presence of concurrent accesses to shared data and in the presence of failures. Traditionally, the transaction semantics is defined by the ACID properties (Atomicity, Consistency, Isolation and Durability) which implementation is through such mechanisms as commitment ...
  • A Resource-based Mutual Exclusion Algorithm supporting Dynamic Acting Range and Mobility for Wireless Sensor and Actor Networks 

    Derhab, Abdelouahid; Zair, Mustapha
    In : Rapports de recherche internes, (CERIST, Alger, 2010-05)
    Achieving optimal actor resources usage is one of the fundamental issues in Wireless sensor and Actor Networks (WSANs). One solution is to maximize the mutually exclusive regions (i.e., regions covered by one actor). In this paper, we take a novel approach to define and resolve the mutual exclusion problem. We propose ...
  • A review on Privacy and Anonymity in electronic communications 

    Benmeziane, Souad; Badache, Nadjib
    In : (Conference Procedings, Merida Spain, 2006-10-25)
    Current Internet networking protocols provide no support to ensure the privacy of communication endpoints. An adversary can determine which addresses have asked for which services. Anonymity is now increasingly important for networked applications. This paper overviews the concept of anonymity in electronic communications, ...