Computer Science

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Publications

  • 2023
    Sami Rojbi, Anis Rojbi, Mohamed Salah Gouider

    Enhancing the Accessibility of Images on the Web: A Holistic View and New Perspectives

    49th PATTAYA International Conference on “Science, Engineering, Technology & Healthcare” (PSETH-23), Tech Rep, 2023

    Résumé

    None of the available web specifications consider images as purely visual elements. However, their online accessibility remains challenging. This issue has taken on an entirely new dimension with the evolution of mobile technology. Nowadays, most Internet users use mobile phones equipped with an increasing number of cameras. Obviously, this has helped democratize access to the web. However, it has made images the major medium of communication, and thus it has increased the challenge of image accessibility for people with disabilities. In light of the above, we present a holistic view of the accessibility of images for use on the internet. Precisely, we seek to provide an overview of the various accessibility strategies while highlighting an implementation gap that research has attempted to address. In addition, we discuss new research perspectives that can lead to the design of a new alternative to the image. Soon, it may be possible to supplement the ALT text with non-speech sound alternatives or even tactile alternatives.

    Wiem Zaouga, Lilia Rejeb, Latifa Rabai

    Tailoring project management practices for decision making: an in-depth comparative study

    International Journal of Project Organisation and ManagementVol. 15, No. 2, pp 158-183. DOI: 10.1504/IJPOM.2023.131677, 2023

    Résumé

    The efforts to successfully complete projects lead to the development of various project management (PM) standards, best practices and guidelines, issued by different organisational bodies. These PM practices, when appropriately implemented, lead to a better project performance. However, studies on how to adopt and adapt such practices according to management needs, remain limited. In this paper, we are going to focus on how to map the project requirements with the suitable PM practices to support the PM decision making. To respond this question, we put forward an in-depth comparative study amongst the well-established PM practices considering a set of features to pick out their challenges, limits as well as their applicability. Through this comparison, we extend the discussion of PM practices features by contrasting them to three distinct categories of requirements which are technical, contextual and behavioural. This analysis allows us to map each category to its corresponding practice(s). Our finding provides comprehensive recommendation guidelines to both practitioners and researchers in order to improve their decision making in line with the project environment.

  • Besma Ben Amara, Hédia Sellemi, Lamjed Ben Said

    The Principal Characteristics of a Serious Game to Ensure Its Effective Design

    Proceedings of DiGRA 2022 Conference: Bringing Worlds Together 2022, Published: 2022-01-01, 2022

    Résumé

    Serious games (SG) adoption increased in multiple fields. As a first step towards a global SG design approach, it is crucial to characterize the game intended. However, there is still a lack of what the principal and necessary characteristics are to specify SG. This paper explores SG Characteristics (SGCs) to bridge this gap by first analyzing features from SG studies in different domains (education, health, business) and purposes (SG classification, learning impacts, design, and evaluation), then identifying shared features. The findings showed 12 high-level abstraction classes of characteristics, which we named Common SGCs (CSGCs), reducing features overlapping and describing the general structure of the game. The CSGCs set serves as a foundation for SG design and reusability. It also provides the main criteria for SG classification and evaluation. Designers could implement CSGCs by matching each one of them with related concrete game mechanics plethora. We present future research directions in the scope of the SG design approach using the CSGCs proposal.

  • Sami Rojbi, Anis Rojbi, Mohamed Salah Gouider

    Toward an Inclusive Digital Information Access: Full Keyboard Access & Direct Navigation

    Alexandrov, D., Boukhanovsky, A., Chugunov, A., Kabanov, Y., Koltsova, O. (eds) Digital Transformation and Global Society. DTGS 2018. Communications in Computer and Information Science, vol 859. Springer, Cham., 2018

    Résumé

    The laws prohibit the discrimination of people with special needs. Accessibility has become a legal obligation for the State, which must ensure equal opportunities for access to services and knowledge. Many people have difficulty in accessing graphical interfaces or controlling the mouse. To promote a high degree of web usability, w3c guidelines emphasize the need to allow the user to interact with web pages not only through a pointing device, but through the keyboard as well. Among their appearance, access keys implementations were criticized. This article gives an overview about access keys drawbacks and presents perspectives on how to support web app interaction through a keyboard.

  • Samira Harrabi, Ines ben Jaafar, Khaled ghedira

    Routing Challenges and Solutions in Vehicular Ad hoc Networks

    Sensors and Transducer journal, 2016

    Résumé

    Vehicular Ad-hoc Networks (VANETs) are known as a special type of Mobile Ad-hoc Networks (MANETs) specialized in vehicular communications. These networks are based on smart vehicles and basestations, which share data by means of wireless communications. To route these information, a routing protocol is required. Since the VANETs have a particular network features as rapidly changeable topology, designing an efficient routing scheme is a very hard task. In this paper, we mainly focus on surveying new routing protocols dedicated to VANETs. We present unicast, multicast and broadcast protocols. The experimental results are discussed to evaluate the performance of the presented methods.

  • Samira Harrabi, Walid Chainbi, Khaled Ghedira

    A multi-agent proactive routing protocol for Vehicular Ad-Hoc Networks

    Proc.of The 2014 International Symposium on Networks, Computers and Communications (IEEE ISNCC 2014),, 2014

    Résumé

    Vehicular ad hoc network is one of the most promising applications of MANET. However, they have special properties such as high mobility, network portioning and constrained topology which require smaller latency and higher reliability. These vehicles that move along the same road are able to communicate either directly to the destination or by using the intermediate node, such as router. Therefore, designing an efficient routing protocol for all VANETs scenarios is very hard. A lot of researches about routing in VANETs are considering DSDV routing protocol as the most suitable protocol for mobility environment. But DSDV generates a large volume of control packets and takes up a large part of available bandwidth. In this paper, we propose an improving DSDV routing protocol based on multi-agent system approach to solve the performance problems mentioned above. Experimental results show promising results regarding the adoption of the proposed approach.
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  • Sami Rojbi, Makram Soui

    User modeling and Web-based customazation techniques: An examination of the published literature

    2011 4th International Conference on Logistics, 2011

    Résumé

    This paper proposes a state of the art of the user modeling and interfaces customization techniques. It presents and discusses techniques intended to be used by application's designers and also end-user based techniques. It specifies the characteristics modeled in these systems as well as the used technologies.