University of Sfax

Displaying 1-12 of 12 results

  • White Papers // Feb 2013

    Improving the Performance of Aggregate Queries with Cached Tuples in MapReduce

    As an essential approach for extracting valuable summarized information from massive data set, aggregate query plays important roles for data-intensive applications in cloud computing. As a popular cloud computing platform, MapReduce is a promising paradigm for processing massive data. However, executing aggregate query over massive data sets is very time-consuming...

    Provided By University of Sfax

  • White Papers // Jun 2012

    Analysis Study of Time Synchronization Protocols in Wireless Sensor Networks

    One of the main pervasive problems Wireless Sensor Networks (WSN) encounter is to maintain flawless communication sharing and cooperative processing between sensors via radio links to ensure a reliable treatment of information. Many applications based on these WSNs consider local clocks at each sensor node that need to be synchronized...

    Provided By University of Sfax

  • White Papers // Mar 2012

    LNT: A Logical Neighbor Tree Secure Group Communication Scheme for Wireless Sensor Networks

    Secure group communication is a paradigm that primarily designates one-to-many communication security. The proposed works relevant to secure group communication have predominantly considered the whole network as being a single group managed by a central powerful node capable of supporting heavy communication, computation and storage cost. However, a typical Wireless...

    Provided By University of Sfax

  • White Papers // May 2011

    Cross-Layer Design for Energy-Efficient in Wireless Underwater Communication: Acoustic Frequency IDentification Case Study

    Thanks to the recent developments on communication techniques, micro-technology and on digital electronics, Underwater Wireless Sensor Networks (UWSNs) are being employed in several types of underwater applications such as wireless identification named Acoustic Frequency IDentification (AFID). In this research, the authors are trying to adapt concepts of wireless acoustic identification...

    Provided By University of Sfax

  • White Papers // May 2011

    A Protocol for Re-Authentication and Handoff Notification in Wireless Mesh Networks

    Mesh technology has captured the interest of university research and industry, because of its capacity to meet at the same time the requirements of Internet service provider and users. But, its architecture and configuration do not ensure a protection against the unauthorized use of the network since the used basic...

    Provided By University of Sfax

  • White Papers // Dec 2010

    Seamless Mobility in Heterogeneous Wireless Networks

    In next generation of wireless networks, different technologies belonging to one or more operators should be integrated to form a heterogeneous environment based on an IP core network infrastructure. This ensures user mobility and service continuity by maintaining connections when switching between various technologies and it introduces new resources and...

    Provided By University of Sfax

  • White Papers // Oct 2010

    Distributing Arabic Handwriting Recognition System Based on the Combination of Grid Meta-Scheduling and P2P Technologies (Omnivore)

    Character recognition is one of the oldest fields of research. It is the art of automating both the process of reading and keyboard input of text in documents. A major part of information in documents is in the form of alphanumeric text. Significant movement has been made in handwriting recognition...

    Provided By University of Sfax

  • White Papers // May 2010

    A Coded Cooperative Networking MAC Protocol in Non Transparent Multihop WiMAX Network

    IEEE 802.16j Mobile Multi-hop Relay (MMR) was proposed to gain coverage extension and throughput enhancement. The objective of this paper, is to suggest a coded cooperative networking MAC protocol in non transparent multihop WiMax network. The proposed design takes in consideration network coding approach between relays. The authors try to...

    Provided By University of Sfax

  • White Papers // Jun 2009

    PKI and UDDI Based Trust Centre: An Attempt to Improve Web Service Security

    Nowadays Internet becomes the most used tool for the ever increasing amount of various transactions between institutions, organizations and more generally between clients and providers. Conducted studies and experiments showed that it is more convenient to provide and achieve these transactions as Web Services (WS) to guarantee their flexibility and...

    Provided By University of Sfax

  • White Papers // Jun 2009

    Semantic Annotation Formalism of Video-Conferencing Documents

    The development of distance trainings based of the information technologies and communication paves the way to the emergence of new professional specializations. The objective of this paper is to describe a semantic annotation formalism of video-conferencing documents. It is about an annotation process based in the interpretation of the content...

    Provided By University of Sfax

  • White Papers // Jan 2009

    To What Extent Can Profit Margin, Value Added Growth And Ownership Concentration Portrait Corporate Governance Systems?

    This paper examines how product market competition and corporate governance variables affect differently the productivity growth of corporations. Corporate governance systems are expected to have different patterns regarding the relationship determining the impact of corporate governance mechanisms, product market competition and ownership structure. Corporate performance is measured by value added...

    Provided By University of Sfax

  • White Papers // Aug 2008

    A Framework to Model Real-Time Databases

    Real-time databases deal with time-constrained data and time-constrained transactions. The design of this kind of databases requires the introduction of new concepts to support both data structures and the dynamic behaviour of the database. In this paper, the authors give an overview about different aspects of real-time databases and they...

    Provided By University of Sfax

  • White Papers // May 2010

    A Coded Cooperative Networking MAC Protocol in Non Transparent Multihop WiMAX Network

    IEEE 802.16j Mobile Multi-hop Relay (MMR) was proposed to gain coverage extension and throughput enhancement. The objective of this paper, is to suggest a coded cooperative networking MAC protocol in non transparent multihop WiMax network. The proposed design takes in consideration network coding approach between relays. The authors try to...

    Provided By University of Sfax

  • White Papers // May 2011

    Cross-Layer Design for Energy-Efficient in Wireless Underwater Communication: Acoustic Frequency IDentification Case Study

    Thanks to the recent developments on communication techniques, micro-technology and on digital electronics, Underwater Wireless Sensor Networks (UWSNs) are being employed in several types of underwater applications such as wireless identification named Acoustic Frequency IDentification (AFID). In this research, the authors are trying to adapt concepts of wireless acoustic identification...

    Provided By University of Sfax

  • White Papers // May 2011

    A Protocol for Re-Authentication and Handoff Notification in Wireless Mesh Networks

    Mesh technology has captured the interest of university research and industry, because of its capacity to meet at the same time the requirements of Internet service provider and users. But, its architecture and configuration do not ensure a protection against the unauthorized use of the network since the used basic...

    Provided By University of Sfax

  • White Papers // Mar 2012

    LNT: A Logical Neighbor Tree Secure Group Communication Scheme for Wireless Sensor Networks

    Secure group communication is a paradigm that primarily designates one-to-many communication security. The proposed works relevant to secure group communication have predominantly considered the whole network as being a single group managed by a central powerful node capable of supporting heavy communication, computation and storage cost. However, a typical Wireless...

    Provided By University of Sfax

  • White Papers // Jun 2012

    Analysis Study of Time Synchronization Protocols in Wireless Sensor Networks

    One of the main pervasive problems Wireless Sensor Networks (WSN) encounter is to maintain flawless communication sharing and cooperative processing between sensors via radio links to ensure a reliable treatment of information. Many applications based on these WSNs consider local clocks at each sensor node that need to be synchronized...

    Provided By University of Sfax

  • White Papers // Oct 2010

    Distributing Arabic Handwriting Recognition System Based on the Combination of Grid Meta-Scheduling and P2P Technologies (Omnivore)

    Character recognition is one of the oldest fields of research. It is the art of automating both the process of reading and keyboard input of text in documents. A major part of information in documents is in the form of alphanumeric text. Significant movement has been made in handwriting recognition...

    Provided By University of Sfax

  • White Papers // Feb 2013

    Improving the Performance of Aggregate Queries with Cached Tuples in MapReduce

    As an essential approach for extracting valuable summarized information from massive data set, aggregate query plays important roles for data-intensive applications in cloud computing. As a popular cloud computing platform, MapReduce is a promising paradigm for processing massive data. However, executing aggregate query over massive data sets is very time-consuming...

    Provided By University of Sfax

  • White Papers // Jun 2009

    PKI and UDDI Based Trust Centre: An Attempt to Improve Web Service Security

    Nowadays Internet becomes the most used tool for the ever increasing amount of various transactions between institutions, organizations and more generally between clients and providers. Conducted studies and experiments showed that it is more convenient to provide and achieve these transactions as Web Services (WS) to guarantee their flexibility and...

    Provided By University of Sfax

  • White Papers // Jun 2009

    Semantic Annotation Formalism of Video-Conferencing Documents

    The development of distance trainings based of the information technologies and communication paves the way to the emergence of new professional specializations. The objective of this paper is to describe a semantic annotation formalism of video-conferencing documents. It is about an annotation process based in the interpretation of the content...

    Provided By University of Sfax

  • White Papers // Dec 2010

    Seamless Mobility in Heterogeneous Wireless Networks

    In next generation of wireless networks, different technologies belonging to one or more operators should be integrated to form a heterogeneous environment based on an IP core network infrastructure. This ensures user mobility and service continuity by maintaining connections when switching between various technologies and it introduces new resources and...

    Provided By University of Sfax

  • White Papers // Jan 2009

    To What Extent Can Profit Margin, Value Added Growth And Ownership Concentration Portrait Corporate Governance Systems?

    This paper examines how product market competition and corporate governance variables affect differently the productivity growth of corporations. Corporate governance systems are expected to have different patterns regarding the relationship determining the impact of corporate governance mechanisms, product market competition and ownership structure. Corporate performance is measured by value added...

    Provided By University of Sfax

  • White Papers // Aug 2008

    A Framework to Model Real-Time Databases

    Real-time databases deal with time-constrained data and time-constrained transactions. The design of this kind of databases requires the introduction of new concepts to support both data structures and the dynamic behaviour of the database. In this paper, the authors give an overview about different aspects of real-time databases and they...

    Provided By University of Sfax