• A Novel Approach to Preserving Privacy in Social Network Data Publishing 

    Bensimessaoud, Sihem; Benmeziane, Souad; Badache, Nadjib; Djellalbia, Amina
    In : Rapports de recherche internes, (CERIST, Alger, 2016-10-24)
    Today, more and more social network data are published for data analysis. Although this analysis is important, these publications may be targeted by re-identification attacks i.e., where an attacker tries to recover the identities of some nodes that were removed during the anonymization process. Among these attacks, we ...
  • A basic platform of collaborative filtring 

    Nouali, Omar; Kirat, Sabah; Meziani, Hadjer
    In : Rapports de recherche internes, (CERIST, Alger, 2008)
    With the explosive growth of the quantity of new information the development of information systems to target the best answers provided to users, so they are closer to their expectations and personal taste, has become an unavoidable necessity. The collaborative filtering systems are among these information systems with ...
  • A Classification-based XML Information Retrieval Model 

    Bessai, Fatma-Zohra
    In : Rapports de recherche internes, (CERIST, Alger, 2014-11-27)
    The main problem of content-based XML information retrieval is how to select the relevant unit of information that answers the user’s query composed of only key words (content only). Our objective is to select relevant elements that can belong to different parts of XML documents of the corpus for user’s information need. ...
  • A Clustering Application for the Web Usage Mining 

    Kouici, Salima
    In : Rapports de recherche internes, (CERIST, Alger, 2012-12)
    The Web Usage Mining constitutes a new branch of the Web Mining. It allows the study of the behavior of both users and potential customers via their site navigation. The mainly used source for the Web Usage Mining is the servers Log Files. A Log File contains an important mass of data, including user’s information ...
  • A clustering technique to analyse anonymous systems 

    Benmeziane, Souad; Badache, Nadjib
    In : Rapports de recherche internes, (CERIST, Alger, 2014-07-20)
    Concerns about privacy and anonymity have gained more and more attention in conjunction with the rapid growth of the Internet as a means of communication and information dissemination. A number of anonymous communication systems have been developed to protect the identity of communication participants. Nevertheless, it ...
  • A comparative study between compressed video watermarking methods based on DCT coefficients and intra prediction 

    Bouchama, Samira; Hamami, Latifa; Aliane, Hassina
    In : Rapports de recherche internes, (CERIST, Alger, 2011-09)
    Several watermarking methods have been applied to the newest video codec H.264/AVC to satisfy different applications such as authentication, tamper proof and copyright protection. Our objective through this paper is to present a comparative study between watermarking methods based on the quantized (Q) DCT coefficients ...
  • A formal approach for a self organizing protocol: Production System application 

    Mellah, Hakima; Drias, Habiba; Hassas, Salima
    In : Rapports de recherche internes, (CERIST, Alger, 2009-10)
    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 ...
  • 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 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 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 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 simple approach to distinguish between Maghrebi and Persian calligraphy in old manuscripts 

    Setitra, Insaf; Meziane, Abdelkrim
    In : Rapports de recherche internes, (CERIST, Alger, 2014-04-07)
    Manual annotation of images is usually a mandatory task in many applications where no knowledge about the image is available. In presence of huge number of images, this task becomes very tedious and prone to human errors. In this paper, we contribute in automatic annotation of Arabic old manuscripts by discovering ...
  • A spatial model for editing multimedia documents 

    Tonkin, Nourredine; Maredj, Azze-Eddine; Sadallah, Madjid
    In : Rapports de recherche internes, (CERIST, Alger, 2010-09)
    In the multimedia documents authoring systems the management of spatial and temporal inter-objects relations is the most delicate task. Spatial relations management refers to the appropriate means to express relations between the document objects and guarantee their consistency. Usually it is represented by spatial model ...
  • A study of Wireless Sensor Network Architectures and Projects for Traffic Light Monitoring 

    Kafi, Mohamed Amine; Badache, Nadjib; Challal, Yacine; Bouabdallah, Abdelmadjid; Djenouri, Djamel
    In : Rapports de recherche internes, (CERIST, Alger, 2012)
    Vehicular traffic is increasing around the world, especially in urban areas. This increase results in a huge traffic congestion, which has dramatic consequences on economy, human health, and environment. Traditional methods used for traffic management, surveillance and control become inefficient in terms of performance, ...
  • A study on discrimination of SIFT feature applied to binary images 

    Setitra, Insaf; Larabi, Slimane
    In : Rapports de recherche internes, (CERIST, Alger, 2015-10-04)
    Scale Invariant Feature Transform (SIFT) since its first apparition in 2004 has been (and still is) extensively used in computer vision to classify and match objects in RGB and grey level images and videos. However, since the descriptor used in SIFT approach is based on gradient magnitude and orientation, it has always ...
  • A survey on Wireless Sensor Networks for Urban Traffic Monitoring: Applications and Architectures 

    Kafi, Mohamed Amine; Badache, Nadjib; Challal, Yacine; Bouabdallah, Abdelmadjid; Djenouri, Djamel
    In : Rapports de recherche internes, (CERIST, Alger, 2012)
    Vehicular traffic is increasing around the world, especially in urban areas. This increase results in a huge traffic congestion, which has dramatic consequences on economy, human health, and environment. Traditional methods used for traffic management, surveillance and control become inefficient in terms of performance, ...