Hiroshima University

Displaying 1-8 of 8 results

  • White Papers // Apr 2013

    Quantitative Security Evaluation for Software System from Vulnerability Database

    Many security incidents have been reported in enterprise systems and personal computers, such as the denial-of-service attack via computer viruses and the data leak caused by unauthorized accesses. This paper proposes a quantitative security evaluation for software system from the vulnerability data consisting of discovery date, solution date and exploit...

    Provided By Hiroshima University

  • White Papers // Oct 2012

    Preamble Design for Joint Estimation of Channel and I/Q Imbalance in MIMO-OFDM Systems

    In this paper, preamble design for estimation of frequency selective channels and In-phase/Quadrature-phase (I/Q) imbalance in Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems is proposed. First the authors utilize convex optimization to optimize power of all active subcarriers, then they employ Cross Entropy (CE) optimization techniques to...

    Provided By Hiroshima University

  • White Papers // Mar 2012

    Variants of Mersenne Twister Suitable for Graphic Processors

    A Graphic Processing Unit (GPU) is a highly parallel processor designed for computer graphics. GPUs are now widely used in both personal computers and game machines, and are cheap despite their high computational power. This paper proposes a type of pseudorandom number generator, Mersenne Twister for Graphic Processor (MTGP), for...

    Provided By Hiroshima University

  • White Papers // Jul 2011

    A Fine-Grained Algorithm for Non-Parametric Software Reliability Estimation

    In this paper, the authors improve a non-parametric order statistics-based software reliability model by Barghout, Littlewood and Abdel-Ghaly (1998), from the standpoints of estimation algorithm and reliability measure. More specifically, they introduce the kernel density estimation method with a truncated Gaussian kernel function and estimate the software fault-detection time distribution...

    Provided By Hiroshima University

  • White Papers // Nov 2010

    Domain Decomposition Method on GPU Cluster

    Pallalel GPGPU computing for lattice QCD simulations has a bottleneck on the GPU to GPU data communication due to the lack of the direct data exchanging facility. In this work the authors investigate the performance of quark solver using the Restricted Additive Schwarz (RAS) preconditioner on a low cost GPU...

    Provided By Hiroshima University

  • White Papers // Jul 2010

    Estimating the Error Rate in an Apache Web Server System

    In this paper, the authors focus on the relationship between the error rate which is one of the representative reliability measures in Apache web servers and the system parameters which reflect on the web server's system performance, and develop a probability model to describe it. More specifically, they implement a...

    Provided By Hiroshima University

  • White Papers // Oct 2008

    PKI Based Semi-Fragile Watermark for Visual Content Authentication

    Multimedia content owners always endure of copyright protection and ownership verification of their digital assets. Robust watermarking techniques are invented to defeat these problems. However evolution of the watermarks focused different security aspects of multimedia data such as content integrity, data authentication, etc. As a result, fragile watermarking was introduced...

    Provided By Hiroshima University

  • White Papers // May 2008

    A Barrier Synchronization Protocol for Broadcast Networks Based on Dynamic Access Control

    In this paper, the authors propose a fast barrier synchronization protocol for broadcast networks. A key point of the protocol is to avoid the performance degradation due to low level network protocol (e.g., conflicts in CSMA/CD) and that due to high level protocol (e.g., inefficiency of static ordering of bus...

    Provided By Hiroshima University

  • White Papers // Oct 2012

    Preamble Design for Joint Estimation of Channel and I/Q Imbalance in MIMO-OFDM Systems

    In this paper, preamble design for estimation of frequency selective channels and In-phase/Quadrature-phase (I/Q) imbalance in Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems is proposed. First the authors utilize convex optimization to optimize power of all active subcarriers, then they employ Cross Entropy (CE) optimization techniques to...

    Provided By Hiroshima University

  • White Papers // Apr 2013

    Quantitative Security Evaluation for Software System from Vulnerability Database

    Many security incidents have been reported in enterprise systems and personal computers, such as the denial-of-service attack via computer viruses and the data leak caused by unauthorized accesses. This paper proposes a quantitative security evaluation for software system from the vulnerability data consisting of discovery date, solution date and exploit...

    Provided By Hiroshima University

  • White Papers // Mar 2012

    Variants of Mersenne Twister Suitable for Graphic Processors

    A Graphic Processing Unit (GPU) is a highly parallel processor designed for computer graphics. GPUs are now widely used in both personal computers and game machines, and are cheap despite their high computational power. This paper proposes a type of pseudorandom number generator, Mersenne Twister for Graphic Processor (MTGP), for...

    Provided By Hiroshima University

  • White Papers // Oct 2008

    PKI Based Semi-Fragile Watermark for Visual Content Authentication

    Multimedia content owners always endure of copyright protection and ownership verification of their digital assets. Robust watermarking techniques are invented to defeat these problems. However evolution of the watermarks focused different security aspects of multimedia data such as content integrity, data authentication, etc. As a result, fragile watermarking was introduced...

    Provided By Hiroshima University

  • White Papers // Nov 2010

    Domain Decomposition Method on GPU Cluster

    Pallalel GPGPU computing for lattice QCD simulations has a bottleneck on the GPU to GPU data communication due to the lack of the direct data exchanging facility. In this work the authors investigate the performance of quark solver using the Restricted Additive Schwarz (RAS) preconditioner on a low cost GPU...

    Provided By Hiroshima University

  • White Papers // May 2008

    A Barrier Synchronization Protocol for Broadcast Networks Based on Dynamic Access Control

    In this paper, the authors propose a fast barrier synchronization protocol for broadcast networks. A key point of the protocol is to avoid the performance degradation due to low level network protocol (e.g., conflicts in CSMA/CD) and that due to high level protocol (e.g., inefficiency of static ordering of bus...

    Provided By Hiroshima University

  • White Papers // Jul 2010

    Estimating the Error Rate in an Apache Web Server System

    In this paper, the authors focus on the relationship between the error rate which is one of the representative reliability measures in Apache web servers and the system parameters which reflect on the web server's system performance, and develop a probability model to describe it. More specifically, they implement a...

    Provided By Hiroshima University

  • White Papers // Jul 2011

    A Fine-Grained Algorithm for Non-Parametric Software Reliability Estimation

    In this paper, the authors improve a non-parametric order statistics-based software reliability model by Barghout, Littlewood and Abdel-Ghaly (1998), from the standpoints of estimation algorithm and reliability measure. More specifically, they introduce the kernel density estimation method with a truncated Gaussian kernel function and estimate the software fault-detection time distribution...

    Provided By Hiroshima University