Universidade Federal de Lavras

Displaying 1-9 of 9 results

  • White Papers // Dec 2013

    Quantum Nonlocality as the Route for Ever-Lasting Unconditionally Secure Bit Commitment

    The authors present a bit commitment protocol based on quantum nonlocality that seems to bring everlasting unconditional security. Although security is not rigorously proved, physical arguments and numerical simulations support this conclusion. The key point is that the proof of the commitment is forced to become classical data uncorrelated with...

    Provided By Universidade Federal de Lavras

  • White Papers // Aug 2013

    A Parallel Hybrid Genetic Algorithm on Cloud Computing for the Vehicle Routing Problem with Time Windows

    In this paper, the authors propose a new Parallel Hybrid Genetic Algorithm approach for Vehicle Routing Problem with Time Windows. The algorithm was developed to be executed on cloud computing web services and serves as an online application for real world problems. A new parallel scheme was proposed with shared...

    Provided By Universidade Federal de Lavras

  • White Papers // Nov 2012

    Data and Instruction Uniformity in Minimal Multi-Threading

    Simultaneous Multi-Threading (SMT) is a hardware model in which different threads share the same instruction fetching unit. This model is a compromise between high parallelism and low hardware cost. Minimal Multi-Threading (MMT) is a technique recently proposed to share instructions and execution between threads in a SMT machine. In this...

    Provided By Universidade Federal de Lavras

  • White Papers // Nov 2012

    Divergence Analysis with Affine Constraints

    The rising popularity of graphics processing units is bringing renewed interest in code optimization techniques for SIMD processors. Many of these optimizations rely on divergence analyses, which classify variables as uniform, if they have the same value on every thread, or divergent, if they might not. This paper introduces a...

    Provided By Universidade Federal de Lavras

  • White Papers // May 2012

    MAC Protocols for Wireless Sensor Networks Over Radio-Over-Fiber Links

    In this paper, two Medium Access Control (MAC) protocols exclusively tailored to WSNs over RoF (RWSNs) namely SPP-MAC (Scheduled Priority Polling Medium Access Control) (polling-based) and HMARS (Hybrid Medium Access Control for Hybrid Radio-over-Fiber Wireless Sensor Network Architecture) (hybrid-based) are proposed. They deal with the main problems in RWSNs i.e....

    Provided By Universidade Federal de Lavras

  • White Papers // May 2012

    Simultaneous Branch and Warp Interweaving for Sustained GPU Performance

    Single-Instruction Multiple-Thread (SIMT) micro-architectures implemented in Graphics Processing Units (GPUs) run fine-grained threads in lockstep by grouping them into units, referred to as warps, to amortize the cost of instruction fetch, decode and control logic over multiple execution units. As individual threads take divergent execution paths, their processing takes place...

    Provided By Universidade Federal de Lavras

  • White Papers // Sep 2009

    Stochastic and Balanced Distributed Energy-Efficient Clustering (SBDEEC) for Heterogeneous Wireless Sensor Networks

    Typically, a wireless sensor network contains an important number of inexpensive power constrained sensors which collect data from the environment and transmit them towards the base station in a cooperative way. Saving energy and therefore, extending the wireless sensor networks lifetime, imposes a great challenge. Many new protocols are specifically...

    Provided By Universidade Federal de Lavras

  • White Papers // May 2008

    A Comparison of BPMN and UML 2.0 Activity Diagrams

    Interest in evaluating Business Process Modeling Languages has widespread, in part due to the increase of the number of languages available for this purpose. Several works on the evaluation of BPMLs are available. Their evaluation is mainly based on perspectives centered in modeling experts. In this paper, the authors address...

    Provided By Universidade Federal de Lavras

  • White Papers // Apr 2007

    Identity-Based Encryption for Sensor Networks

    In spite of several years of intense research, the area of security and cryptography in Wireless Sensor Networks (WSNs) still has a number of open problems. On the other hand, the advent of Identity-Based Encryption (IBE) has enabled a wide range of new cryptographic solutions. In this paper, the authors...

    Provided By Universidade Federal de Lavras

  • White Papers // May 2012

    MAC Protocols for Wireless Sensor Networks Over Radio-Over-Fiber Links

    In this paper, two Medium Access Control (MAC) protocols exclusively tailored to WSNs over RoF (RWSNs) namely SPP-MAC (Scheduled Priority Polling Medium Access Control) (polling-based) and HMARS (Hybrid Medium Access Control for Hybrid Radio-over-Fiber Wireless Sensor Network Architecture) (hybrid-based) are proposed. They deal with the main problems in RWSNs i.e....

    Provided By Universidade Federal de Lavras

  • White Papers // Sep 2009

    Stochastic and Balanced Distributed Energy-Efficient Clustering (SBDEEC) for Heterogeneous Wireless Sensor Networks

    Typically, a wireless sensor network contains an important number of inexpensive power constrained sensors which collect data from the environment and transmit them towards the base station in a cooperative way. Saving energy and therefore, extending the wireless sensor networks lifetime, imposes a great challenge. Many new protocols are specifically...

    Provided By Universidade Federal de Lavras

  • White Papers // May 2012

    Simultaneous Branch and Warp Interweaving for Sustained GPU Performance

    Single-Instruction Multiple-Thread (SIMT) micro-architectures implemented in Graphics Processing Units (GPUs) run fine-grained threads in lockstep by grouping them into units, referred to as warps, to amortize the cost of instruction fetch, decode and control logic over multiple execution units. As individual threads take divergent execution paths, their processing takes place...

    Provided By Universidade Federal de Lavras

  • White Papers // Nov 2012

    Data and Instruction Uniformity in Minimal Multi-Threading

    Simultaneous Multi-Threading (SMT) is a hardware model in which different threads share the same instruction fetching unit. This model is a compromise between high parallelism and low hardware cost. Minimal Multi-Threading (MMT) is a technique recently proposed to share instructions and execution between threads in a SMT machine. In this...

    Provided By Universidade Federal de Lavras

  • White Papers // Nov 2012

    Divergence Analysis with Affine Constraints

    The rising popularity of graphics processing units is bringing renewed interest in code optimization techniques for SIMD processors. Many of these optimizations rely on divergence analyses, which classify variables as uniform, if they have the same value on every thread, or divergent, if they might not. This paper introduces a...

    Provided By Universidade Federal de Lavras

  • White Papers // May 2008

    A Comparison of BPMN and UML 2.0 Activity Diagrams

    Interest in evaluating Business Process Modeling Languages has widespread, in part due to the increase of the number of languages available for this purpose. Several works on the evaluation of BPMLs are available. Their evaluation is mainly based on perspectives centered in modeling experts. In this paper, the authors address...

    Provided By Universidade Federal de Lavras

  • White Papers // Aug 2013

    A Parallel Hybrid Genetic Algorithm on Cloud Computing for the Vehicle Routing Problem with Time Windows

    In this paper, the authors propose a new Parallel Hybrid Genetic Algorithm approach for Vehicle Routing Problem with Time Windows. The algorithm was developed to be executed on cloud computing web services and serves as an online application for real world problems. A new parallel scheme was proposed with shared...

    Provided By Universidade Federal de Lavras

  • White Papers // Apr 2007

    Identity-Based Encryption for Sensor Networks

    In spite of several years of intense research, the area of security and cryptography in Wireless Sensor Networks (WSNs) still has a number of open problems. On the other hand, the advent of Identity-Based Encryption (IBE) has enabled a wide range of new cryptographic solutions. In this paper, the authors...

    Provided By Universidade Federal de Lavras

  • White Papers // Dec 2013

    Quantum Nonlocality as the Route for Ever-Lasting Unconditionally Secure Bit Commitment

    The authors present a bit commitment protocol based on quantum nonlocality that seems to bring everlasting unconditional security. Although security is not rigorously proved, physical arguments and numerical simulations support this conclusion. The key point is that the proof of the commitment is forced to become classical data uncorrelated with...

    Provided By Universidade Federal de Lavras