Portland State University

Displaying 1-19 of 19 results

  • White Papers // May 2012

    Traffic Merging for Energy-Efficient Datacenter Networks

    Numerous studies have shown that datacenter networks typically see loads of between 5%-25% but the energy draw of these networks is equal to operating them at maximum load. In this paper, the authors propose a novel way to make these networks more energy proportional - that is, the energy draw...

    Provided By Portland State University

  • White Papers // May 2011

    Contracts and Specifications for Functional Logic Programming

    The expressive power of functional logic languages supports high-level specifications as well as efficient implementations of problems in the same language. If specifications are executable, they can be used both as initial prototypical implementations and as contracts for checking the reliable execution of implementations expected to satisfy the specification. In...

    Provided By Portland State University

  • White Papers // May 2011

    New Functional Logic Design Patterns

    Patterns distill successful experience in solving common software problems. The authors introduce a handful of new software design patterns for functional logic languages. Some patterns are motivated by the evolution of the paradigm in the last 10 years. Following usual approaches, for each pattern they propose a name and they...

    Provided By Portland State University

  • White Papers // May 2011

    Merging Traffic to Save Energy in the Enterprise

    In typical enterprise networks, a large fraction of ports see utilization of less than 5% at peak times and close to zero utilization otherwise. Therefore, the normal architecture of one switch port per end-host is very wasteful because of the need for high port density switches to support numerous end...

    Provided By Portland State University

  • White Papers // Sep 2010

    A Transformation Tool for Functional Logic Program Development

    The authors present a tool to develop functional logic programs from their specifications. Specifications of functional logic languages, i.e., contracts in the form of pre- and post-conditions, are written in the same language as the final programs. Thus, contracts serve either as initial prototypical implementations or as assertions to check...

    Provided By Portland State University

  • White Papers // Aug 2010

    RHA: A Robust Hybrid Architecture for Information Processing in Wireless Sensor Networks

    The paradox of Wireless Sensor Networks (WSNs) is that the low-power, miniaturized sensors that can be deeply embedded in the physical world, are too resource-constrained to capture high frequency phenomena. In this paper, the authors propose RHA, a robust hybrid architecture for information processing to extend sensing capacity while conserving...

    Provided By Portland State University

  • White Papers // Aug 2010

    The Potential Impact of Green Technologies in Next-Generation Wireline Networks - Is There Room for Energy Saving Optimization?

    Recently, network operators around the world reported statistics of network energy requirements and the related carbon footprint, showing an alarming and growing trend. Such high energy consumption can be mainly ascribed to networking equipment designed to work at the maximum capacity with high and almost constant dissipation, independently of the...

    Provided By Portland State University

  • White Papers // Apr 2010

    Learning Complex Cell Invariance From Natural Videos: A Plausibility Proof

    Neuroscience has revealed many properties of neurons and of the functional organization of visual cortex that are believed to be essential to human vision, but are missing in standard artificial neural networks. Equally important may be the sheer scale of visual cortex requiring 1 petaflop of computation. In a year,...

    Provided By Portland State University

  • White Papers // Feb 2010

    Link Selection for Point-to-Point 60GHz Networks

    60GHz is well-suited for device-to-device communication and for general in-home applications due to its huge available bandwidth. However, links at this frequency are easily degraded by environmental conditions. Indeed, the poor multipath makes it necessary to maintain good LoS (Line of Sight) paths between communicating pairs of nodes. In this...

    Provided By Portland State University

  • White Papers // Nov 2009

    Introducing Technology Into the Linux Kernel: A Case Study

    There can be no doubt that a great many technologies have been added to Linux TM over the past ten years. What is less well-known is that it is often necessary to introduce a large amount of Linux into a given technology in order to successfully introduce that technology into...

    Provided By Portland State University

  • White Papers // Sep 2009

    Architecture Considerations for 60 GHz Wireless Networks

    Providing high data rates to wireless users has long been a goal that has driven the development of new technologies and standards in the past decade. Now, with the opening up of the spectrum at 60GHz, it has become possible to design WLANs that can meet the goal of Gbps/user...

    Provided By Portland State University

  • White Papers // Aug 2009

    Sustainable IT Services: Assessing The Impact Of Green Computing Practices

    Green computing refers to the practice of using computing resources more efficiently while maintaining or increasing overall performance. Sustainable IT services require the integration of green computing practices such as power management, virtualization, improving cooling technology, recycling, electronic waste disposal, and optimization of the IT infrastructure to meet sustainability requirements....

    Provided By Portland State University

  • White Papers // Jul 2009

    Towards Trustworthy Participatory Sensing

    Grassroots Participatory Sensing empowers people to collect and share sensor data using mobile devices across many applications, spanning intelligent transportation, air quality monitoring and social networking. In this paper, the authors argue that the very openness of such a system makes it vulnerable to abuse by malicious users who may...

    Provided By Portland State University

  • White Papers // May 2009

    Towards Energy Efficient Workload Placement in Data Centers

    A new era of computing is being defined by a shift to aggregate computing resources into large-scale Data Centers (DCs) that are shared by a global pool of users. In this paradigm, DCs' operational energy costs are a rising concern as they continue an upward trend that is poised to...

    Provided By Portland State University

  • White Papers // Jan 2009

    A MAC Protocol Based on Adaptive Beamforming for Ad Hoc Networks

    This paper presents a novel slotted MAC (Medium Access Control) protocol for nodes equipped with adaptive antenna array in ad hoc network. The protocol relies on the ability of antenna to uses DOA (Direction-Of-Arrival) information to beamform by placing nulls in the direction of interferers thus maximize SINR (Signal to...

    Provided By Portland State University

  • White Papers // Dec 2008

    Traffic Analysis of UDP-Based Flows in Ourmon Portland State University - Computer Science Technical Report - 0807

    This paper presents a custom UDP flow tuple with an IP address key and a set of simple related statistical attributes. Attributes are used to calculate a per host metric called the UDP work weight which roughly measures the amount of network noise caused by a host. The work weight...

    Provided By Portland State University

  • White Papers // Dec 2008

    DHV: A Code Consistency Maintenance Protocol for Multi-Hop Wireless Sensor Networks

    Ensuring that every sensor node has the same code version is challenging in dynamic, unreliable multi-hop sensor networks. When nodes have different code versions, the network may not behave as intended, wasting time and energy. The authors propose and evaluate DHV, an efficient code consistency maintenance protocol to ensure that...

    Provided By Portland State University

  • White Papers // Nov 2008

    Data Visualization as a Tool for Improved Decision Making within Transit Agencies

    Transit agency TriMet provides bus transit performance monitoring using data collected via automatic vehicle location and automatic passenger counter technologies. This is a regional transit provider in the Portland, OR area. Information with TriMet is collected and archived for offline analysis of transit operations. When it comes to performance monitoring,...

    Provided By Portland State University

  • White Papers // Sep 2008

    SDMA for 60GHz Gigabit Wireless Networks

    With the opening of the 60 GHz spectrum for WLANs, there has been a great deal of interest in academia and industry on how best to exploit the more than 5 GHz of available bandwidth. One goal in the wireless community has been delivering gigabit data rates to end users....

    Provided By Portland State University

  • White Papers // Jan 2009

    A MAC Protocol Based on Adaptive Beamforming for Ad Hoc Networks

    This paper presents a novel slotted MAC (Medium Access Control) protocol for nodes equipped with adaptive antenna array in ad hoc network. The protocol relies on the ability of antenna to uses DOA (Direction-Of-Arrival) information to beamform by placing nulls in the direction of interferers thus maximize SINR (Signal to...

    Provided By Portland State University

  • White Papers // Dec 2008

    Traffic Analysis of UDP-Based Flows in Ourmon Portland State University - Computer Science Technical Report - 0807

    This paper presents a custom UDP flow tuple with an IP address key and a set of simple related statistical attributes. Attributes are used to calculate a per host metric called the UDP work weight which roughly measures the amount of network noise caused by a host. The work weight...

    Provided By Portland State University

  • White Papers // Nov 2008

    Data Visualization as a Tool for Improved Decision Making within Transit Agencies

    Transit agency TriMet provides bus transit performance monitoring using data collected via automatic vehicle location and automatic passenger counter technologies. This is a regional transit provider in the Portland, OR area. Information with TriMet is collected and archived for offline analysis of transit operations. When it comes to performance monitoring,...

    Provided By Portland State University

  • White Papers // Nov 2009

    Introducing Technology Into the Linux Kernel: A Case Study

    There can be no doubt that a great many technologies have been added to Linux TM over the past ten years. What is less well-known is that it is often necessary to introduce a large amount of Linux into a given technology in order to successfully introduce that technology into...

    Provided By Portland State University

  • White Papers // Aug 2009

    Sustainable IT Services: Assessing The Impact Of Green Computing Practices

    Green computing refers to the practice of using computing resources more efficiently while maintaining or increasing overall performance. Sustainable IT services require the integration of green computing practices such as power management, virtualization, improving cooling technology, recycling, electronic waste disposal, and optimization of the IT infrastructure to meet sustainability requirements....

    Provided By Portland State University

  • White Papers // Dec 2008

    DHV: A Code Consistency Maintenance Protocol for Multi-Hop Wireless Sensor Networks

    Ensuring that every sensor node has the same code version is challenging in dynamic, unreliable multi-hop sensor networks. When nodes have different code versions, the network may not behave as intended, wasting time and energy. The authors propose and evaluate DHV, an efficient code consistency maintenance protocol to ensure that...

    Provided By Portland State University

  • White Papers // Aug 2010

    RHA: A Robust Hybrid Architecture for Information Processing in Wireless Sensor Networks

    The paradox of Wireless Sensor Networks (WSNs) is that the low-power, miniaturized sensors that can be deeply embedded in the physical world, are too resource-constrained to capture high frequency phenomena. In this paper, the authors propose RHA, a robust hybrid architecture for information processing to extend sensing capacity while conserving...

    Provided By Portland State University

  • White Papers // Jul 2009

    Towards Trustworthy Participatory Sensing

    Grassroots Participatory Sensing empowers people to collect and share sensor data using mobile devices across many applications, spanning intelligent transportation, air quality monitoring and social networking. In this paper, the authors argue that the very openness of such a system makes it vulnerable to abuse by malicious users who may...

    Provided By Portland State University

  • White Papers // May 2009

    Towards Energy Efficient Workload Placement in Data Centers

    A new era of computing is being defined by a shift to aggregate computing resources into large-scale Data Centers (DCs) that are shared by a global pool of users. In this paradigm, DCs' operational energy costs are a rising concern as they continue an upward trend that is poised to...

    Provided By Portland State University

  • White Papers // Feb 2010

    Link Selection for Point-to-Point 60GHz Networks

    60GHz is well-suited for device-to-device communication and for general in-home applications due to its huge available bandwidth. However, links at this frequency are easily degraded by environmental conditions. Indeed, the poor multipath makes it necessary to maintain good LoS (Line of Sight) paths between communicating pairs of nodes. In this...

    Provided By Portland State University

  • White Papers // Sep 2009

    Architecture Considerations for 60 GHz Wireless Networks

    Providing high data rates to wireless users has long been a goal that has driven the development of new technologies and standards in the past decade. Now, with the opening up of the spectrum at 60GHz, it has become possible to design WLANs that can meet the goal of Gbps/user...

    Provided By Portland State University

  • White Papers // Sep 2008

    SDMA for 60GHz Gigabit Wireless Networks

    With the opening of the 60 GHz spectrum for WLANs, there has been a great deal of interest in academia and industry on how best to exploit the more than 5 GHz of available bandwidth. One goal in the wireless community has been delivering gigabit data rates to end users....

    Provided By Portland State University

  • White Papers // May 2011

    Merging Traffic to Save Energy in the Enterprise

    In typical enterprise networks, a large fraction of ports see utilization of less than 5% at peak times and close to zero utilization otherwise. Therefore, the normal architecture of one switch port per end-host is very wasteful because of the need for high port density switches to support numerous end...

    Provided By Portland State University

  • White Papers // Apr 2010

    Learning Complex Cell Invariance From Natural Videos: A Plausibility Proof

    Neuroscience has revealed many properties of neurons and of the functional organization of visual cortex that are believed to be essential to human vision, but are missing in standard artificial neural networks. Equally important may be the sheer scale of visual cortex requiring 1 petaflop of computation. In a year,...

    Provided By Portland State University

  • White Papers // May 2011

    New Functional Logic Design Patterns

    Patterns distill successful experience in solving common software problems. The authors introduce a handful of new software design patterns for functional logic languages. Some patterns are motivated by the evolution of the paradigm in the last 10 years. Following usual approaches, for each pattern they propose a name and they...

    Provided By Portland State University

  • White Papers // May 2011

    Contracts and Specifications for Functional Logic Programming

    The expressive power of functional logic languages supports high-level specifications as well as efficient implementations of problems in the same language. If specifications are executable, they can be used both as initial prototypical implementations and as contracts for checking the reliable execution of implementations expected to satisfy the specification. In...

    Provided By Portland State University

  • White Papers // Sep 2010

    A Transformation Tool for Functional Logic Program Development

    The authors present a tool to develop functional logic programs from their specifications. Specifications of functional logic languages, i.e., contracts in the form of pre- and post-conditions, are written in the same language as the final programs. Thus, contracts serve either as initial prototypical implementations or as assertions to check...

    Provided By Portland State University

  • White Papers // Aug 2010

    The Potential Impact of Green Technologies in Next-Generation Wireline Networks - Is There Room for Energy Saving Optimization?

    Recently, network operators around the world reported statistics of network energy requirements and the related carbon footprint, showing an alarming and growing trend. Such high energy consumption can be mainly ascribed to networking equipment designed to work at the maximum capacity with high and almost constant dissipation, independently of the...

    Provided By Portland State University

  • White Papers // May 2012

    Traffic Merging for Energy-Efficient Datacenter Networks

    Numerous studies have shown that datacenter networks typically see loads of between 5%-25% but the energy draw of these networks is equal to operating them at maximum load. In this paper, the authors propose a novel way to make these networks more energy proportional - that is, the energy draw...

    Provided By Portland State University