CUD Digital repository

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  • Numerical analysis of stimulated Raman scattering in nonlinear photonic crystal fiber for broad spectral content 
    Cherif, Rim; Zghal, Mourad; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2007)
    We numerically analyze the stimulated Raman scattering (SRS) in nonlinear photonic crystal fibers (PCF). Generalized nonlinear Schrodinger equation was used to model the propagation of femtosecond pulses in PCF. We demonstrate ...
  • Optical generation of UWB signal : a comparative study 
    Dridi, Kais; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2007)
    In this study, we present an overview on recent existing methods to generate UWB signals. Given the increasing interest in the UWB over optical fiber, special attention will be devoted to optical methods for generating UWB ...
  • Self-imaging based dispersion compensation : performance and tolerance of the system 
    Guizani, Sghaier; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2007)
    Transmitting ultra wideband (UWB) pulse signals over optical fiber is a certain sign of Chromatic dispersion existence. (CD) is a serious problem in optical transmission because the velocity of light depends on the ...
  • Space based generation signal for UWB over fiber 
    Dridi, Kais; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2007)
    We propose a novel approach for generating UWB signals for propagation over the optical fiber. This technique uses the effect of chromatic dispersion in single mode fibers, expressed by the Schrodinger equation. After ...
  • Time based generation signal for UWB over fiber 
    Dridi, Kais; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2007)
    We propose a new all optical fiber based Ultra-wideband (UWB) pulse generation for propagation over optical fibers (UWBoF). The approach is based on time delay. The technique consists in duplicating the input signal, ...
  • A modal logic for the CARE usability properties for multimodal user interfaces 
    Kamel, Nadjet; Selouani, Sid-Ahmed; Hamam, Habib (2008)
    This paper proposes the use of model- checking technique to validate Multimodal User Interfaces (MUIs). It introduces a modal logic to express the CARE (Complementarity, Assignation, Redundancy and Equivalent) usability ...
  • An optimized RFID-based academic library 
    Fennani, A.; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2008)
    We present a solution for integrating RFID technology in academic libraries by offering cost-effectiveness and good quality of service. On the one hand, we challenge hardware issues which include optimization of the layout ...
  • RoF networks : a comprehensive study 
    Chettat, Hichem; Mokhtar, Simohamed Lotfy; Bouslimani, Yassine; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2008)
    We present a comparative study of different Fiber-Wireless networks with regards to their applications, architecture, hardware complexity, development costs, offered services and allocated bandwidths. While spectral resources ...
  • A cooperative and conversational virtual agent for M-commerce applications 
    Rekik, Siwar; Selouani, Sid-Ahmed; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2009)
    The aim of this paper is to present a cooperative approach to improve the Human-System spoken dialogues. The main advantage of the proposed approach is its ability to reach both of the user and the system goals more ...
  • A highly robust audio hashing system using auditory-based front-end processing 
    Salem, Abderraouf Ben; Selouani, Sid-Ahmed; Hamam, Habib; Caelen, Jean (Institute of Electrical and Electronics Engineers Inc., 2009)
    In this paper, a robust perceptual audio hashing system is presented. A model of the human auditory system is used to extract robust features from the outputs of a non-linear filter bank that mimics the human basilar ...
  • A model-checking approach for the verification of CARE usability properties for multimodal user interfaces 
    Kamel, Nadjet; Selouani, Sid-Ahmed; Hamam, Habib (Praise Worthy Prize S.r.l., 2009-01)
    A model-checking-based approach is proposed to verify the CARE (Complementarity, Assignement, Redundancy and Equivalence) usability properties for Multimodal User Interfaces (MUIs). This approach reduces the states explosion ...
  • Web-based engine for program curriculum designers 
    Hamam, Habib; Loucif, Samia (Institute of Electrical and Electronics Engineers Inc., 2009-11)
    Educational institutions pay careful attention to the design of program curricula, which represent a framework to meet institutional goals and missions. Of course, the success of any institution depends highly on the quality ...
  • Auditory-based subband blind source separation using sample-by-sample and Infomax algorithms 
    Salem, Abderraouf Ben; Selouani, Sid Ahmed; Hamam, Habib (2010)
    We present a new subband decomposition method for the separation of convolutive mixtures of speech. This method uses a sample-by-sample algorithm to perform the subband decomposition by mimicking the processing performed ...
  • Controlled distortion for high capacity data-in-speech spectrum steganography 
    Djebbar, Fatiha; Hamam, Habib; Abed-Meraim, Karim; Guerchi, Driss (Institute of Electrical and Electronics Engineers Inc., 2010)
    Methods applied to ensure privacy of digital data became essential in many real life applications. Efficient secrecy can be achieved, at least in part, by implementing steganography techniques. In this paper, we present a ...
  • Deepkover - an adaptive artful intelligent assistance system for cognitively impaired people 
    Najjar, Mehdi; Courtemanche, Francois; Hamam, Habib; Mayers, Andre (Taylor and Francis Ltd., 2010)
    This article presents a novel modular adaptive artful intelligent assistance system for cognitively and/or memory impaired people engaged in the realisation of their activities of daily living (ADLs). The goal of this ...
  • Dynamic energy based text-in-speech spectrum hiding using speech masking properties 
    Djebbar, Fatiha; Abed-Meraim, Karim; Guerchi, Driss; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2010)
    In this paper we present a new method for text-in-speech Fast Fourier Transform (FFT) based steganography. Our method exploits high energetic magnitude frequency components of speech spectrum to hide the secret text. The ...
  • Intensity based self-imaging 
    Hamam, Habib (OSA - The Optical Society, 2010)
    We propose an iterative method to optimize the phase profile of the initial field so that its intensity profile is observed periodically along the longitudinal (propagation) axis. The new method is inspired from the ...
  • A new hybrid frame ALOHA and binary splitting algorithm for anti-collision in RFID systems 
    Al-Medhwahi, Mohammed; Alkholidi, Abdulsalam; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2010)
    Collision is considered as one of the most important issues to be in mind in RFID system designing. Although, there are many algorithms that all of them are aiming - at the end - to decrease collision state numbers or to ...
  • OFDM with parity bit selected block spreading 
    Moussa, Sherif; Dahmane, Adel Omar; D'Amours, Claude; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2010)
    In this paper, a new scheme that combines Orthogonal Frequency Division Multiplexing (OFDM) with parity bit selected block spreading is introduced. In this proposed method, the data symbols in each block is used to select ...
  • Text hiding in high frequency components of speech spectrum 
    Djebbar, Fatiha; Guerchi, Driss; Abed-Meraim, Karim; Hamam, Habib (Institute of Electrical and Electronics Engineers Inc., 2010)
    Boosted by recent advances in the information technology field, methods applied to ensure privacy of digital data became very important in many real life applications. Efficient secrecy can be achieved at least in part, ...

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