University of Tunis

Displaying 1-16 of 16 results

  • White Papers // May 2012

    Energy Consumption Model in Ad Hoc Mobile Network

    The aim of this paper is to model the nodes battery discharge in wireless ad hoc networks. Many work focus on the energy consumption in such networks. Even, the research in the highest layers of the ISO model, takes into account the energy consumption and efficiency. Indeed, the nodes that...

    Provided By University of Tunis

  • White Papers // Dec 2011

    A Full Performance Analysis of Channel Estimation Methods for Time Varying OFDM Systems

    In this paper, the authors have evaluated various methods of time-frequency-selective fading channels estimation in OFDM system and some of them improved under time varying conditions. So, these different techniques will be studied through different algorithms and for different schemes of modulations (16 QAM, BPSK, QPSK,...). Channel estimation gathers different...

    Provided By University of Tunis

  • White Papers // May 2011

    Semantic Annotation of Requirements for Automatic UML Class Diagram Generation

    The increasing complexity of software engineering requires effective methods and tools to support requirements analysts' activities. While much of a company's knowledge can be found in text repositories, current content management systems have limited capabilities for structuring and interpreting documents. In this paper, the authors propose a tool for transforming...

    Provided By University of Tunis

  • White Papers // May 2011

    Performance Improvement of the Software Development Project Using the Value Management Approach

    Improving performance and delivering value for customers have become a central theme in business. The software industry has become an increasingly important sector for the economy growth in Tunisia. This paper aims to show how using Value Management in the Tunisian software industry for project analysis gives new insight about...

    Provided By University of Tunis

  • White Papers // Apr 2011

    Toward a Peer-to-Peer PKI for Mobile Ad-Hoc Networks

    Deploying PKIs in ad hoc networks opens up various issues related to the intrinsic characteristics of these networks. In the literature, many proposals for PKI over ad hoc networks are based on the distribution of the certification authority via a threshold secret sharing scheme. However, these proposals are mostly suitable...

    Provided By University of Tunis

  • White Papers // Feb 2011

    A Trajectory UML Profile for Modeling Trajectory Data: A Mobile Hospital Use Case

    A large amount of data resulting from trajectories of moving objects activities are collected thanks to localization based services and some associated automated processes. Trajectories data can be used either for transactional and analysis purposes in various domains (Heath care, commerce, environment, etc.). For this reason, modeling trajectory data at...

    Provided By University of Tunis

  • White Papers // Feb 2011

    Managing and Querying Web Services Communities: A Survey

    With the advance of Web Services technologies and the emergence of Web Services into the information space, tremendous opportunities for empowering users and organizations appear in various application domains including electronic commerce, travel, intelligence information gathering and analysis, health care, digital government, etc. However, the technology to organize, search, integrate...

    Provided By University of Tunis

  • White Papers // Nov 2010

    Novel Fine Synchronization Using TDT for Ultra Wideband Impulse Radios

    UWB Impulse Radios (UWB-IR) have attracted increasing interest due to their potential to propose high user capacity with low-complexity and low-power transceivers. It is approved by the Federal Communications Commission's (FCC) Report in which the UWB spectral mask is released and published in February 2002. Most of these benefits initiate...

    Provided By University of Tunis

  • White Papers // Apr 2010

    Voice Disorders Identification Using Multilayer Neural Network

    In this paper the authors present a new method for voice disorders classification based on multilayer neural network. The processing algorithm is based on a hybrid technique which uses the wavelets energy coefficients as input of the multilayer neural network. The training step uses a speech database of several pathological...

    Provided By University of Tunis

  • White Papers // Mar 2010

    A Composite Leading Indicator Of Tunisian Inflation

    This paper investigates the possibility of constructing a Composite Leading Indicator (CLI) of Tunisian inflation. For doing so, partial information about future inflation rate provided by a number of basic series is analyzed first. Based on the correlation analysis, a few of these basic series are chosen for construction of...

    Provided By University of Tunis

  • White Papers // Oct 2009

    Multimedia Courses Generator for Deaf Children

    In this paper, the authors present an environment developed in the research laboratory of technologies of information and communication of the university of Tunis to aid deaf people in improving their social integration and communication capabilities. In fact, it is proved that sign language is not innate at deaf children...

    Provided By University of Tunis

  • White Papers // Aug 2009

    Executable Security Policies: Specification and Validation of Security Policies

    Security Policies constitute the core of network protection infrastructures. However, their development is a sensitive task because it can be in opposition with the security requirements (e.g. lack of rule or conflicting rules). A specification task seems to be indispensible in order to clarify the desired exigencies. A validation process...

    Provided By University of Tunis

  • White Papers // Jun 2009

    Neuro-Fuzzy Network Based on Extended Kalman Filtering for Financial Time Series

    The neural network's performance can be measured by efficiency and accuracy. The major disadvantages of neural network approach are that the generalization capability of neural networks is often significantly low, and it may take a very long time to tune the weights in the net to generate an accurate model...

    Provided By University of Tunis

  • White Papers // Feb 2009

    Effect Of Auditee Business Risk, Audit Risk And Auditor Business Risk On Auditor Auditee Negotiation Outcomes: An Experimental Study In Tunisian Context

    The purpose of this paper is to study the impact of auditee business risk, audit risk and auditor business risk evaluation on auditor-auditee negotiation outcomes. An experimental research was conducted using 200 Tunisian auditors as participants. The authors have proved the association between audit risk and auditee business risk. Also,...

    Provided By University of Tunis

  • White Papers // Jan 2009

    Determinants Of Exchange Rate Practices In The MENA Countries: Some Further Empirical Results

    This paper analyses the determinants of exchange rate practices in 15 MENA countries for the 1977- 2007 period placing special emphasis on structural and macroeconomic explanations. The authors use three different exchange rate regime classifications in order to avoid potentially misleading specification. Even though the empirical results using the de...

    Provided By University of Tunis

  • White Papers // Dec 2008

    The Law Of Growth And Attraction: An Endogenous Model Of Absorptive Capacities, FDI And Income For MENA Countries

    In this paper, the authors build a structural model of growth and they estimate it on panel data. They go further than the previous studies of Bende et al. (2000, 2003) or Li & Liu (2005), because they not only control for the endogenity of FDI towards growth, but also...

    Provided By University of Tunis

  • White Papers // Feb 2011

    A Trajectory UML Profile for Modeling Trajectory Data: A Mobile Hospital Use Case

    A large amount of data resulting from trajectories of moving objects activities are collected thanks to localization based services and some associated automated processes. Trajectories data can be used either for transactional and analysis purposes in various domains (Heath care, commerce, environment, etc.). For this reason, modeling trajectory data at...

    Provided By University of Tunis

  • White Papers // Jan 2009

    Determinants Of Exchange Rate Practices In The MENA Countries: Some Further Empirical Results

    This paper analyses the determinants of exchange rate practices in 15 MENA countries for the 1977- 2007 period placing special emphasis on structural and macroeconomic explanations. The authors use three different exchange rate regime classifications in order to avoid potentially misleading specification. Even though the empirical results using the de...

    Provided By University of Tunis

  • White Papers // Mar 2010

    A Composite Leading Indicator Of Tunisian Inflation

    This paper investigates the possibility of constructing a Composite Leading Indicator (CLI) of Tunisian inflation. For doing so, partial information about future inflation rate provided by a number of basic series is analyzed first. Based on the correlation analysis, a few of these basic series are chosen for construction of...

    Provided By University of Tunis

  • White Papers // Feb 2009

    Effect Of Auditee Business Risk, Audit Risk And Auditor Business Risk On Auditor Auditee Negotiation Outcomes: An Experimental Study In Tunisian Context

    The purpose of this paper is to study the impact of auditee business risk, audit risk and auditor business risk evaluation on auditor-auditee negotiation outcomes. An experimental research was conducted using 200 Tunisian auditors as participants. The authors have proved the association between audit risk and auditee business risk. Also,...

    Provided By University of Tunis

  • White Papers // Feb 2011

    Managing and Querying Web Services Communities: A Survey

    With the advance of Web Services technologies and the emergence of Web Services into the information space, tremendous opportunities for empowering users and organizations appear in various application domains including electronic commerce, travel, intelligence information gathering and analysis, health care, digital government, etc. However, the technology to organize, search, integrate...

    Provided By University of Tunis

  • White Papers // Apr 2010

    Voice Disorders Identification Using Multilayer Neural Network

    In this paper the authors present a new method for voice disorders classification based on multilayer neural network. The processing algorithm is based on a hybrid technique which uses the wavelets energy coefficients as input of the multilayer neural network. The training step uses a speech database of several pathological...

    Provided By University of Tunis

  • White Papers // Oct 2009

    Multimedia Courses Generator for Deaf Children

    In this paper, the authors present an environment developed in the research laboratory of technologies of information and communication of the university of Tunis to aid deaf people in improving their social integration and communication capabilities. In fact, it is proved that sign language is not innate at deaf children...

    Provided By University of Tunis

  • White Papers // Aug 2009

    Executable Security Policies: Specification and Validation of Security Policies

    Security Policies constitute the core of network protection infrastructures. However, their development is a sensitive task because it can be in opposition with the security requirements (e.g. lack of rule or conflicting rules). A specification task seems to be indispensible in order to clarify the desired exigencies. A validation process...

    Provided By University of Tunis

  • White Papers // Jun 2009

    Neuro-Fuzzy Network Based on Extended Kalman Filtering for Financial Time Series

    The neural network's performance can be measured by efficiency and accuracy. The major disadvantages of neural network approach are that the generalization capability of neural networks is often significantly low, and it may take a very long time to tune the weights in the net to generate an accurate model...

    Provided By University of Tunis

  • White Papers // May 2011

    Semantic Annotation of Requirements for Automatic UML Class Diagram Generation

    The increasing complexity of software engineering requires effective methods and tools to support requirements analysts' activities. While much of a company's knowledge can be found in text repositories, current content management systems have limited capabilities for structuring and interpreting documents. In this paper, the authors propose a tool for transforming...

    Provided By University of Tunis

  • White Papers // May 2011

    Performance Improvement of the Software Development Project Using the Value Management Approach

    Improving performance and delivering value for customers have become a central theme in business. The software industry has become an increasingly important sector for the economy growth in Tunisia. This paper aims to show how using Value Management in the Tunisian software industry for project analysis gives new insight about...

    Provided By University of Tunis

  • White Papers // Dec 2008

    The Law Of Growth And Attraction: An Endogenous Model Of Absorptive Capacities, FDI And Income For MENA Countries

    In this paper, the authors build a structural model of growth and they estimate it on panel data. They go further than the previous studies of Bende et al. (2000, 2003) or Li & Liu (2005), because they not only control for the endogenity of FDI towards growth, but also...

    Provided By University of Tunis

  • White Papers // Nov 2010

    Novel Fine Synchronization Using TDT for Ultra Wideband Impulse Radios

    UWB Impulse Radios (UWB-IR) have attracted increasing interest due to their potential to propose high user capacity with low-complexity and low-power transceivers. It is approved by the Federal Communications Commission's (FCC) Report in which the UWB spectral mask is released and published in February 2002. Most of these benefits initiate...

    Provided By University of Tunis

  • White Papers // Apr 2011

    Toward a Peer-to-Peer PKI for Mobile Ad-Hoc Networks

    Deploying PKIs in ad hoc networks opens up various issues related to the intrinsic characteristics of these networks. In the literature, many proposals for PKI over ad hoc networks are based on the distribution of the certification authority via a threshold secret sharing scheme. However, these proposals are mostly suitable...

    Provided By University of Tunis

  • White Papers // Dec 2011

    A Full Performance Analysis of Channel Estimation Methods for Time Varying OFDM Systems

    In this paper, the authors have evaluated various methods of time-frequency-selective fading channels estimation in OFDM system and some of them improved under time varying conditions. So, these different techniques will be studied through different algorithms and for different schemes of modulations (16 QAM, BPSK, QPSK,...). Channel estimation gathers different...

    Provided By University of Tunis

  • White Papers // May 2012

    Energy Consumption Model in Ad Hoc Mobile Network

    The aim of this paper is to model the nodes battery discharge in wireless ad hoc networks. Many work focus on the energy consumption in such networks. Even, the research in the highest layers of the ISO model, takes into account the energy consumption and efficiency. Indeed, the nodes that...

    Provided By University of Tunis