Universita Degli Studi di Napoli Federico II

Displaying 1-17 of 17 results

  • White Papers // Nov 2012

    A Cooperative Approach for Distributed Task Execution in Autonomic Clouds

    Virtualization and distributed computing are two key pillars that guarantee scalability of applications deployed in the Cloud. In Autonomous Cooperative Cloud-based Platforms, autonomous computing nodes cooperate to offer a PaaS Cloud for the deployment of user applications. Each node must allocate the necessary resources for customer applications to be executed...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // May 2012

    CPM-Based Spread Spectrum Systems for Multi-User Communications

    The authors propose a new Spread Spectrum (SS) system based on Continuous Phase Modulations (CPMs). The main idea is to exploit the sequence of modulation indices of a multi-h CPM as a Frequency Hopping (FH) sequence. They will show how the sequence of indices impacts on the CPM signal bandwidth...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // May 2012

    How to Significantly Improve the Spectral Efficiency of Linear Modulations Through Time-Frequency Packing and Advanced Processing

    The authors recently investigated the spectral efficiency, achievable with a symbol-by-symbol receiver, for linear modulations employing time-frequency packing. In this paper, they will investigate the improvements that can be obtained by increasing the receiver complexity. In the numerical results, they will mainly concentrate on time packing (an extension of the...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // May 2011

    IP Packet Interleaving: Bridging the Gap Between Theory and Practice

    In this paper, the authors paved the way to the deployment of time diversity at packet level in real networks. In particular, they verified the loss behaviour over real networks, and they presented a platform (called TimeD) to provide loss decorrelation and targeted to UDP flows. To move from theory...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Dec 2010

    Monitoring and Measuring Wireless Network Performance in the Presence of Middleboxes

    Monitoring and measurement of wireless networks play an important role for a number of reasons. In current networking scenarios, middleboxes (NAT, firewall, PEP, PCMS, ...) are more and more common. In this paper, the authors present preliminary results of the ongoing work on the monitoring and measurement of the performance...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Nov 2010

    Multi-Protocol and Multi-Platform Traffic Generation and Measurement

    D-ITG is a software platform for traffic generation and active measurements which present several features that make it a robust and flexible tool for networking researchers and developers. In this paper, the authors will show how it is possible to perform several experiments under a variety of network scenarios, which...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Jul 2010

    Integrating a Network IDS Into an Open Source Cloud Computing Environment

    The success of the Cloud Computing paradigm may be jeopardized by concerns about the risk of misuse of this model aimed at conducting illegal activities. This paper addresses the issue of detecting Denial of Service attacks performed by means of resources acquired on-demand on a Cloud Computing platform. To this...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // May 2010

    UANM: A Platform for Experimenting With Available Bandwidth Estimation Tools

    In the field of network monitoring and measurement, the efficiency and accuracy of the adopted tools is strongly dependent on structural and dynamic characteristics of the network scenario under measure and on manual fine tuning of the involved parameters. This is, for example, the case of the end-to-end available bandwidth...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Apr 2010

    Performance Footprints of Heavy-Users in 3G Networks Via Empirical Measurement

    Cellular technology is widely used for Internet access, also because most operators are now offering Mbit/s data rates at affordable prices. Many studies analyzed the performance of these networks using analytical or simulation approaches. However, due to lack of data from operational environments, very little is known about the performance...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Apr 2010

    DAME: A Distributed Data Mining & Exploration Framework within the Virtual Observatory

    Scientific areas share the same broad requirements of being able to deal with massive and distributed datasets while, when possible, being integrated with services and applications. In order to solve the growing gap between the incremental generation of data and the understanding of it, it is required to know how...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Sep 2009

    Improving FFDA of Web Servers Through a Rule-Based Logging Approach

    Log production is known to be a developer dependent, error-prone process. This results in heterogeneous and inaccurate logs, which can mislead Field Failure Data Analysis (FFDA). Research papers face logs issues by proposing manipulation techniques to be applied to the field data source as it is. This source can however...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Jun 2009

    An Agent-based Bridge between Business Process and Business Rules

    Industry has been and still is, more than ever, interested in executing business functions that span multiple applications. This demands high-levels of interoperability and a more flexible and adaptive business process management. In the attempt to delineate an effective solution, some researchers have envisaged as strategic the integration of the...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Apr 2009

    Traffic Analysis of Peer-to-Peer IPTV Communities

    The Internet is currently experiencing one of the most important challenges in terms of content distribution since its first uses as a medium for content delivery: users from passive downloaders and browsers are moving towards content producers and publishers. They often distribute and retrieve multimedia contents establishing network communities. This...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Mar 2009

    Opportunistic Routing for Disruption Tolerant Networks

    Opportunistic networks represent one of the most interesting evolution of MANET paradigm. Generally speaking, opportunistic networks enable user communication in environments where disconnection and reconnection are likely and link performance is extremely non stationary. In this paper, the authors propose a routing protocol, based on the opportunistic routing paradigm, able...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Jan 2009

    On Finitely Recursive Programs

    Disjunctive finitary programs are a class of logic programs admitting function symbols and hence infinite domains. They have very good computational properties, for example ground queries are decidable while in the general case the stable model semantics is ?1 1-hard. In this paper the authors prove that a larger class...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Nov 2008

    Integrated Tools for Performance-Oriented Distributed Software Development

    This paper presents an integrated set of tools for performance-oriented development of software targeted to distributed heterogeneous systems. Using these tools, software development is carried out through a friendly and handy graphical interface able to exploit the MetaPL notation system for software description and the HeSSE simulation environment for its...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Sep 2007

    An Agent-Based Service Oriented Architecture

    Industry is more and more interested in executing business functions that span multiple applications. This demands high-levels of interoperability and a more flexible and adaptive business process management. The trend is to have systems assembled from a loosely coupled collection of Web services, which are ubiquitous and organically integrated. This...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Nov 2012

    A Cooperative Approach for Distributed Task Execution in Autonomic Clouds

    Virtualization and distributed computing are two key pillars that guarantee scalability of applications deployed in the Cloud. In Autonomous Cooperative Cloud-based Platforms, autonomous computing nodes cooperate to offer a PaaS Cloud for the deployment of user applications. Each node must allocate the necessary resources for customer applications to be executed...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Apr 2010

    DAME: A Distributed Data Mining & Exploration Framework within the Virtual Observatory

    Scientific areas share the same broad requirements of being able to deal with massive and distributed datasets while, when possible, being integrated with services and applications. In order to solve the growing gap between the incremental generation of data and the understanding of it, it is required to know how...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Jul 2010

    Integrating a Network IDS Into an Open Source Cloud Computing Environment

    The success of the Cloud Computing paradigm may be jeopardized by concerns about the risk of misuse of this model aimed at conducting illegal activities. This paper addresses the issue of detecting Denial of Service attacks performed by means of resources acquired on-demand on a Cloud Computing platform. To this...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Sep 2009

    Improving FFDA of Web Servers Through a Rule-Based Logging Approach

    Log production is known to be a developer dependent, error-prone process. This results in heterogeneous and inaccurate logs, which can mislead Field Failure Data Analysis (FFDA). Research papers face logs issues by proposing manipulation techniques to be applied to the field data source as it is. This source can however...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Jan 2009

    On Finitely Recursive Programs

    Disjunctive finitary programs are a class of logic programs admitting function symbols and hence infinite domains. They have very good computational properties, for example ground queries are decidable while in the general case the stable model semantics is ?1 1-hard. In this paper the authors prove that a larger class...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Nov 2008

    Integrated Tools for Performance-Oriented Distributed Software Development

    This paper presents an integrated set of tools for performance-oriented development of software targeted to distributed heterogeneous systems. Using these tools, software development is carried out through a friendly and handy graphical interface able to exploit the MetaPL notation system for software description and the HeSSE simulation environment for its...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Dec 2010

    Monitoring and Measuring Wireless Network Performance in the Presence of Middleboxes

    Monitoring and measurement of wireless networks play an important role for a number of reasons. In current networking scenarios, middleboxes (NAT, firewall, PEP, PCMS, ...) are more and more common. In this paper, the authors present preliminary results of the ongoing work on the monitoring and measurement of the performance...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Apr 2009

    Traffic Analysis of Peer-to-Peer IPTV Communities

    The Internet is currently experiencing one of the most important challenges in terms of content distribution since its first uses as a medium for content delivery: users from passive downloaders and browsers are moving towards content producers and publishers. They often distribute and retrieve multimedia contents establishing network communities. This...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // May 2011

    IP Packet Interleaving: Bridging the Gap Between Theory and Practice

    In this paper, the authors paved the way to the deployment of time diversity at packet level in real networks. In particular, they verified the loss behaviour over real networks, and they presented a platform (called TimeD) to provide loss decorrelation and targeted to UDP flows. To move from theory...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // May 2010

    UANM: A Platform for Experimenting With Available Bandwidth Estimation Tools

    In the field of network monitoring and measurement, the efficiency and accuracy of the adopted tools is strongly dependent on structural and dynamic characteristics of the network scenario under measure and on manual fine tuning of the involved parameters. This is, for example, the case of the end-to-end available bandwidth...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Apr 2010

    Performance Footprints of Heavy-Users in 3G Networks Via Empirical Measurement

    Cellular technology is widely used for Internet access, also because most operators are now offering Mbit/s data rates at affordable prices. Many studies analyzed the performance of these networks using analytical or simulation approaches. However, due to lack of data from operational environments, very little is known about the performance...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Nov 2010

    Multi-Protocol and Multi-Platform Traffic Generation and Measurement

    D-ITG is a software platform for traffic generation and active measurements which present several features that make it a robust and flexible tool for networking researchers and developers. In this paper, the authors will show how it is possible to perform several experiments under a variety of network scenarios, which...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Mar 2009

    Opportunistic Routing for Disruption Tolerant Networks

    Opportunistic networks represent one of the most interesting evolution of MANET paradigm. Generally speaking, opportunistic networks enable user communication in environments where disconnection and reconnection are likely and link performance is extremely non stationary. In this paper, the authors propose a routing protocol, based on the opportunistic routing paradigm, able...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // May 2012

    CPM-Based Spread Spectrum Systems for Multi-User Communications

    The authors propose a new Spread Spectrum (SS) system based on Continuous Phase Modulations (CPMs). The main idea is to exploit the sequence of modulation indices of a multi-h CPM as a Frequency Hopping (FH) sequence. They will show how the sequence of indices impacts on the CPM signal bandwidth...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // May 2012

    How to Significantly Improve the Spectral Efficiency of Linear Modulations Through Time-Frequency Packing and Advanced Processing

    The authors recently investigated the spectral efficiency, achievable with a symbol-by-symbol receiver, for linear modulations employing time-frequency packing. In this paper, they will investigate the improvements that can be obtained by increasing the receiver complexity. In the numerical results, they will mainly concentrate on time packing (an extension of the...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Sep 2007

    An Agent-Based Service Oriented Architecture

    Industry is more and more interested in executing business functions that span multiple applications. This demands high-levels of interoperability and a more flexible and adaptive business process management. The trend is to have systems assembled from a loosely coupled collection of Web services, which are ubiquitous and organically integrated. This...

    Provided By Universita Degli Studi di Napoli Federico II

  • White Papers // Jun 2009

    An Agent-based Bridge between Business Process and Business Rules

    Industry has been and still is, more than ever, interested in executing business functions that span multiple applications. This demands high-levels of interoperability and a more flexible and adaptive business process management. In the attempt to delineate an effective solution, some researchers have envisaged as strategic the integration of the...

    Provided By Universita Degli Studi di Napoli Federico II