University of Southampton

Displaying 1-40 of 178 results

  • White Papers // Feb 2014

    A Game Theoretic Framework of SLA-Based Resource Allocation for Competitive Cloud Service Providers

    Cloud computing is an emerging paradigm that allows the on-demand delivering of software, hardware, and data as services. It has attracted a lot of attention recently due to the increasing demand for high performance computing and storage. Resource allocation is one of the most important challenges in the cloud computing...

    Provided By University of Southampton

  • White Papers // Feb 2014

    Order Optimal Coded Delivery and Caching: Multiple Groupcast Index Coding

    The capacity of caching networks has received considerable attention in the past few years. A particularly studied setting is the case of a single server (e.g., a base station) and multiple users, each of which caches segments of files in a finite library. Each user requests one (whole) file in...

    Provided By University of Southampton

  • White Papers // Feb 2014

    Routing and Staffing when Servers are Strategic

    Traditionally, research focusing on the design of routing and staffing policies for service systems has modeled servers as having fixed (possibly heterogeneous) service rates. However, service systems are generally staffed by people. Furthermore, people respond to workload incentives; that is, how hard a person works can depend both on how...

    Provided By University of Southampton

  • White Papers // Feb 2014

    Balancing On-Chip Network Latency in Multi-Application Mapping for Chip-Multiprocessors

    As the number of cores continues to grow in Chip Multi-Processors (CMPs), application-to-core mapping algorithms that leverage the non-uniform on-chip resource access time have been receiving increasing attention. However, existing mapping methods for reducing overall packet latency can-not meet the requirement of balanced on-chip latency when multiple applications are present....

    Provided By University of Southampton

  • White Papers // Jan 2014

    Energy-Efficient Median Filter on FPGA

    Median filters are a popular method for noise extraction, with much work done in the community to achieve high throughput and low hardware cost. In contrast, energy efficiency remains an untapped area for improvement though it has become a topic of increasing interest. The authors deduce memory to be the...

    Provided By University of Southampton

  • White Papers // Jan 2014

    Energy-Efficient Large-Scale Matrix Multiplication on FPGAs

    Energy efficiency has emerged as one of the key performance metrics in computing. In this paper, the authors present an energy efficient design for large-scale matrix multiplication. As a baseline architecture, they use a highly optimized on-chip matrix multiplication architecture extended to support large matrices using external memory. Based on...

    Provided By University of Southampton

  • White Papers // Dec 2013

    On Security Monitoring in SDNs A Strategic Outlook

    The recently proposed Software-Defined Networking (SDN) paradigm aims at enabling rapid innovations and reducing operational cost in the network equipments with the separation of the control and data plane. The network switches support the simple forwarding functions while the complex control logics are implemented in a logically centralized controller using...

    Provided By University of Southampton

  • White Papers // Oct 2013

    Energy-Efficient Architecture for Stride Permutation on Streaming Data

    Stride permutation is widely used in various digital signal processing algorithms when implementing on FPGAs. Permuting a long data sequence through hardware wiring leads to high area consumption and routing complexity. A more scalable approach is to build a hardware structure to permute streamed data inputs. In this paper, the...

    Provided By University of Southampton

  • White Papers // Sep 2013

    Enabling High Performance Computing in Cloud Infrastructure using Virtualized GPUs

    With the advent of virtualization and Infrastructure-as-a-Service (IaaS), the broader scientific computing community is considering the use of clouds for their technical computing needs. This is due to the relative scalability, ease of use, advanced user environment customization abilities clouds provide, as well as many novel computing paradigms available for...

    Provided By University of Southampton

  • White Papers // Sep 2013

    Scalable Many-Field Packet Classification on Multi-Core Processors

    Packet classification matches a packet header against the predefined rules in a rule set; it is a kernel function that has been studied for decades. A recent trend in packet classification is to match a large number of packet header fields. For example, the flow table lookup in Software Defined...

    Provided By University of Southampton

  • White Papers // Sep 2013

    An Electricity Trade Model for Microgrid Communities in Smart Grid

    Distributed microgrid network is the major trend of future smart grid, which contains various kinds of renewable power generation centers and a small group of energy users. In the distributed power system, each microgrid acts as a \"Prosumer\" (producer and consumer) and maximizes its own social welfare. In addition, different...

    Provided By University of Southampton

  • White Papers // Sep 2013

    Towards Hybrid Online On-Demand Querying of Realtime Data with Stateful Complex Event Processing

    Emerging Big Data applications in areas like ecommerce and energy industry require both online and on-demand queries to be performed over vast and fast data arriving as streams. These present novel challenges to Big Data management systems. Complex Event Processing (CEP) is recognized as a high performance online query scheme...

    Provided By University of Southampton

  • White Papers // Sep 2013

    Improvement and Analysis of Encryption and Decryption Performance in Cloud Document

    Cloud computing is the hot topic in recent years, and the cloud-based collaborative service is the emerging service. No matter where the users are or which computers the users use, it enables the cloud users to place their data into the cloud. As long as it connects to the Internet,...

    Provided By University of Southampton

  • White Papers // Aug 2013

    A Bayesian Game Formulation of Power Dissipation and Response Time Minimization in a Mobile Cloud Computing System

    The rapidly developing cloud computing and virtualization techniques provide mobile devices with battery energy saving opportunities by allowing them to offload computation and execute applications remotely. A mobile device should judiciously determine whether to offload computation and which portion of application should be offloaded to the cloud. This paper considers...

    Provided By University of Southampton

  • White Papers // Aug 2013

    An Energy and Deadline Aware Resource Provisioning, Scheduling and Optimization Framework for Cloud Systems

    Cloud computing has attracted significant attention due to the increasing demand for low-cost, high performance, and energy-efficient computing. In this large-scale, heterogeneous, multi-user environment of a cloud system, profit maximization for the Cloud Service Provider (CSP) is a key objective. In this paper, the problem of global optimization of the...

    Provided By University of Southampton

  • White Papers // Aug 2013

    Hierarchical Virtual Machine Consolidation in a Cloud Computing System

    Improving the energy efficiency of cloud computing systems has become an important issue because the electric energy bill for 24/7 operation of these systems can be quite large. The focus of this paper is on the Virtual Machine (VM) consolidation in a cloud computing system as a way of lowering...

    Provided By University of Southampton

  • White Papers // Aug 2013

    Evaluating Energy Efficiency of Floating Point Matrix Multiplication on FPGAs

    State-of-the-art FPGAs offer high operating frequency, unprecedented logic density and a host of other features. As FPGAs are programmed specifically for the problem to be solved, they can achieve higher performance with lower power consumption than general-purpose processors. Therefore, FPGA is a promising implementation technology for computationally intensive applications such...

    Provided By University of Southampton

  • White Papers // Jul 2013

    Introducing PRECIP: An API for Managing Repeatable Experiments in the Cloud

    Cloud computing with its on-demand access to resources has emerged as a tool used by researchers from a wide range of domains to run computer-based experiments. In this paper the authors introduce a flexible experiment management API, written in Python, that simplifies and formalizes the execution of scientific experiments on...

    Provided By University of Southampton

  • White Papers // Jul 2013

    100+ Gbps IPv6 Packet Forwarding on Multi-Core Platforms

    The migration from IPv4 to IPv6 addressing is gradually taking place with the exhaustion of IPv4 address space. This requires the network infrastructure to have the capability to process and route IPv6 packets. However, with the increased complexity of the lookup operation and storage requirements, performing IPv6 lookup at wire-speed...

    Provided By University of Southampton

  • White Papers // Jul 2013

    Profit-Maximizing Resource Allocation for Multi-tier Cloud Computing Systems under Service Level Agreements

    Pervasive use of cloud computing and resulting rise in the number of hosting datacenters (which provide platform or software services to clients who do not have the means to set up and operate their own facilities) have brought forth many challenges including energy cost, peak power dissipation, cooling, carbon emission,...

    Provided By University of Southampton

  • White Papers // Jun 2013

    Towards Proximity-Aware Application Deployment in Geodistributed Clouds

    In this paper, the authors propose a proximity-aware cloud service selection system to help application providers to deploy their applications in the cloud. Cloud platforms deploy multiple data centers geographically distributed around the world. They argue that proximity plays a very important role to improve the application performance when deploying...

    Provided By University of Southampton

  • White Papers // Jun 2013

    Rethinking Data Management for Big Data Scientific Workflows

    Scientific workflows consist of tasks that operate on input data to generate new data products that are used by subsequent tasks. Workflow management systems typically stage data to computational sites before invoking the necessary computations. In some cases data may be accessed using remote I/O. There are limitations with these...

    Provided By University of Southampton

  • White Papers // Jun 2013

    Multi-Core Implementation of Decomposition-Based Packet Classification Algorithms

    Multi-field packet classification is a network kernel function where packets are classified based on a set of predefined rules. Many algorithms and hardware architectures have been proposed to accelerate packet classification. Among them, decomposition-based classification approaches are of major interest to the research community because of the parallel search in...

    Provided By University of Southampton

  • White Papers // May 2013

    High Throughput Energy Efficient Multi-FFT Architecture on FPGAs

    To process high-rate streaming data, throughput is one of the key performance metrics for FFT design. However, high throughput FFT architectures consume large amount of power due to complex routing or excessive memory access. In this paper, the authors propose a Cooley-Turkey algorithm based high throughput energy-efficient multi-FFT architecture. In...

    Provided By University of Southampton

  • White Papers // May 2013

    Diversity Backpressure Scheduling and Routing with Mutual Information Accumulation in Wireless Ad-hoc Networks

    The authors suggest and analyze algorithms for routing in multi-hop wireless ad-hoc networks that exploit mutual information accumulation as the physical layer transmission scheme, and are capable of routing multiple packet streams (commodities) when only the average channel state information is present and that only locally. The proposed algorithms are...

    Provided By University of Southampton

  • White Papers // May 2013

    Cloud Security with Virtualized Defense and Reputation-based Trust Management

    Internet clouds work as service factories built around web-scale datacenters. The elastic cloud resources and huge datasets processed are subject to security breaches, privacy abuses, and copyright violations. Provisioned cloud resources on-demand is especially vulnerable to cyber attacks. The cloud platforms built by Google, IBM, and Amazon all reveal this...

    Provided By University of Southampton

  • White Papers // Apr 2013

    Structured Lattice Codes for Some Two-User Gaussian Networks With Cognition, Coordination and Two Hops

    The authors study a number of two-user interference networks with multiple-antenna transmitters/receivers (MIMO), transmitter side information in the form of linear combinations (over an appropriate finite-field) of the information messages, and two-hop relaying. They start with a Cognitive Interference Channel (CIC) where one of the transmitters (non-cognitive) has knowledge of...

    Provided By University of Southampton

  • White Papers // Apr 2013

    Event Recommendation in Social Networks with Linked Data Enablement

    In recent years, social networking services have gained phenomenal popularity. They allow the authors to explore the world and share their findings in a convenient way. Event is a critical component in social networks. A user can create, share or join different events in their social circle. In this paper,...

    Provided By University of Southampton

  • White Papers // Apr 2013

    Comparing FutureGrid, Amazon EC2, and Open Science Grid for Scientific Workflows

    Scientists have a number of computing infrastructures available to conduct their research, including grids and public or private clouds. This paper explores the use of these cyber-infrastructures to execute scientific workflows, an important class of scientific applications. It examines the benefits and drawbacks of cloud and grid systems using the...

    Provided By University of Southampton

  • White Papers // Mar 2013

    Complex Modeling and Analysis of Workplace Collaboration Data

    Complex networks arise everywhere. Online social networks are famous complex networks examples due to revolutionizing the way people interact on the web, and permitting in practice the study of interdisciplinary theories that arise from human activities, at both micro (i.e. individual) and macro (i.e. community) level. The vast scale (Big...

    Provided By University of Southampton

  • White Papers // Feb 2013

    Efficient MAC for Distributed Multiuser MIMO Systems

    A distributed multiuser MIMO system consists of several access points which are connected to coordinating servers and operate as a large multi-antenna access point. Thanks to joint decoding and precoding, all transmitted signal power is useful, rather than "Interference". The system has the potential to support constant rates as the...

    Provided By University of Southampton

  • White Papers // Feb 2013

    Optimal Throughput-Outage Trade-off in Wireless One-Hop Caching Networks

    The authors consider a wireless Device-To-Device (D2D) network where the nodes have cached information from a library of possible files. Inspired by the current trend in the standardization of the D2D mode for 4th Generation wireless networks, they restrict to one-hop communication: each node place a request to a file...

    Provided By University of Southampton

  • White Papers // Jan 2013

    Optimizations and Analysis of BSP Graph Processing Models on Public Clouds

    Large-scale graph analytics is a central tool in many fields, and exemplifies the size and complexity of Big Data applications. Recent distributed graph processing frameworks utilize the venerable Bulk Synchronous Parallel (BSP) model and promise scalability for large graph analytics. This has been made popular by Google's Pregel, which offers...

    Provided By University of Southampton

  • White Papers // Jan 2013

    Task Parallel Implementation of Belief Propagation in Factor Graphs

    Factor graphs have been increasingly used as probabilistic graphical models. Belief propagation is a prominent algorithm for inference in factor graphs. Due to the high complexity of inference, parallel techniques for belief propagation are needed. In this paper, the authors explore task parallelism for belief propagation in an acyclic factor...

    Provided By University of Southampton

  • White Papers // Jan 2013

    Knowledge Management in Enterprise Resource Planning Systems: Support for Financial Transactions

    Enterprise Resource Planning (ERP) system financial modules require that users be able to provide transaction information. Unfortunately, for a number of reasons users need support in the development of transactions. ERP system users have indicated a need for support for users responsible for generating financial entries. This paper presents a...

    Provided By University of Southampton

  • White Papers // Jan 2013

    Application of the Many Sources Asymptotic in Downscaling Internet-Like Networks

    In the authors' earlier paper, they have presented two methods to scale down the topology of the Internet, while preserving important performance metrics. They have shown that the methods can be used to greatly simplify and expedite performance prediction. The key insight that they have leveraged is that only the...

    Provided By University of Southampton

  • White Papers // Dec 2012

    The Application of Cloud Computing to Scientific Workflows: A Study of Cost and Performance

    The current model of transferring data from data centers to desktops for analysis will soon be rendered impractical by the accelerating growth in the volume of science data sets. Processing will instead often take place on high performance servers co-located with data. Evaluations of how new technologies such as cloud...

    Provided By University of Southampton

  • White Papers // Nov 2012

    Heat Diffusion Algorithm for Resource Allocation and Routing in Multihop Wireless Networks

    The authors propose a new scheduling and routing approach, the Heat Diffusion (HD) protocol, using combinatorial analogue of the heat equation in mathematical physics. The algorithm holds for systems subject to time-varying network conditions with general packet arrivals and random topology states, including ad-hoc networks with mobility. Compared to the...

    Provided By University of Southampton

  • White Papers // Oct 2012

    Integrating Policy with Scientific Workflow Management for Data-Intensive Applications

    As scientific applications generate and consume data at ever-increasing rates, scientific workflow systems that manage the growing complexity of analyses and data movement will increase in importance. The goal of the authors' work is to improve the overall performance of scientific workflows by using policy to improve data staging into...

    Provided By University of Southampton

  • White Papers // Oct 2012

    Peer-to-Peer Data Sharing for Scientific Workflows on Amazon EC2

    In this paper, the authors consider the problem of data sharing in scientific workflows running on the cloud. They present the design and evaluation of a peer-to-peer approach to help solve this problem. They compare the performance of their peer-to-peer file manager with that of two network file systems for...

    Provided By University of Southampton

  • White Papers // Apr 2009

    Energy-Aware Simulation for Wireless Sensor Networks

    Energy-aware sensor nodes are usually tightly energy-constrained, execute energy-efficient algorithms, have the ability to interrogate and control the devices used for storing and consuming energy, and often feature one or more sources of energy harvesting. Due to the cost, time and expertise required to deploy a Wireless Sensor Network (WSN),...

    Provided By University of Southampton

  • White Papers // Mar 2009

    Energy Devices for Sensor Networks: Properties for Simulation and Deployment

    Recent developments in microcontroller, radio transceiver, and energy harvesting device design now permit wireless sensor nodes to operate indefinitely from power scavenged from their environment. Many algorithms for conventional sensor networks assume that nodes run directly from non-rechargeable batteries and therefore attempt to conserve energy rather than carefully exploiting it...

    Provided By University of Southampton

  • White Papers // Aug 2009

    An Accurate Range-Only Tracking System Using Wireless Sensor Networks

    This paper discusses the design of a real-time tracking system targeted for deployment in wireless sensor networks. The proposed system, utilizes accumulated range data from a number of anchor sensor nodes to infer the position and other kinematic variables of a mobile target. To track manoeuvring targets three dynamic models...

    Provided By University of Southampton

  • White Papers // Sep 2008

    Barrage Relay Networks for Cooperative Transport in Tactical MANETS

    Barrage Relay Networks (BRNs) are Mobile Ad-hoc NETworks (MANETs) based on an autonomous cooperative communication scheme that allows any number of radios to cooperate in sending a given message to one or more receivers without the need for coordination. Messages in a BRN propagate outward in spatial waves wherein the...

    Provided By University of Southampton

  • White Papers // Feb 2010

    Topologically Adaptive Parallel Breadth-First Search on Multicore Processors

    Breadth-First Search (BFS) is a fundamental graph theory algorithm that is extensively used to abstract various challenging computational problems. Due to the fine-grained irregular memory accesses, parallelization of BFS can exhibit limited performance on cache-based systems. In this paper, the authors study the relationship between the topology of input graphs...

    Provided By University of Southampton

  • White Papers // Sep 2009

    A Scalable Pipeline Architecture for Line Rate Packet Classification on FPGAs

    Multi-dimensional packet classification is a key function for networking applications in high-speed routers. Although a multitude of research has explored this area, efficient packet classification that supports large rule sets at line rate remains challenging. This paper presents a scalable pipeline architecture, named BiConOLP, for line rate packet classification on...

    Provided By University of Southampton

  • White Papers // May 2012

    Adaptive Energy Forecasting and Information Diffusion for Smart Power Grids

    Smart Power Grids exemplify an emerging class of Cyber Physical Applications that exhibit Dynamic, Distributed and Data intensive (D3) characteristics along with an always-on paradigm to support operational needs. Smart Grids are an outcome of instrumentation, such as Phasor Measurement Units and Smart Power Meters, that is being deployed across...

    Provided By University of Southampton

  • White Papers // Apr 2012

    Scalable Regression Tree Learning on Hadoop Using OpenPlanet

    As scientific and engineering domains attempt to effectively analyze the deluge of data arriving from sensors and instruments, machine learning is becoming a key data mining tool to build prediction models. Regression tree is a popular learning model that combines decision trees and linear regression to forecast numerical target variables...

    Provided By University of Southampton

  • White Papers // May 2012

    Maximum-Likelihood Blind PAM Detection

    Blind sequence detection offers significant gains over conventional symbol-by-symbol detection when channel knowledge is not available at the receiver. However, Maximum-Likelihood (ML) blind sequence detection is often intractable due to exponential complexity in the sequence length. In this paper, the authors develop a polynomial-time ML blind sequence detector for Pulse-Amplitude...

    Provided By University of Southampton

  • White Papers // May 2012

    Wireless Video Content Delivery Through Coded Distributed Caching

    The authors suggest a novel approach to handle the ongoing explosive increase in the demand for video content in mobile devices. They envision femtocell-like base stations, which they call helpers, with weak backhaul links but large storage capabilities. These helpers form a wireless distributed caching network that assists the macro...

    Provided By University of Southampton

  • White Papers // May 2012

    Quality of Information Maximization in Two-Hop Wireless Networks

    An information collection problem in a wireless network with random events is considered. Wireless nodes report on each event using one of multiple reporting formats. Each format has a different quality and uses a different number of bits. Delivering all data in the highest quality format can overload system resources....

    Provided By University of Southampton

  • White Papers // Jun 2012

    Distributed Storage Allocations

    The authors examine the problem of allocating a given total storage budget in a distributed storage system for maximum reliability. A source has a single data object that is to be coded and stored over a set of storage nodes; it is allowed to store any amount of coded data...

    Provided By University of Southampton

  • White Papers // Feb 2012

    The Impact of Secure OSs on Internet Security: What Cyber-Insurers Need to Know

    In recent years, researchers have proposed cyberinsurance as a suitable risk-management technique for enhancing security in Internet-like distributed systems. However, amongst other factors, information asymmetry between the insurer and the insured, and the inter-dependent and correlated nature of cyber risks have contributed in a big way to the failure of...

    Provided By University of Southampton

  • White Papers // Feb 2012

    Cyber-Insurance in Internet Security: A Dig Into the Information Asymmetry Problem

    Internet users such as individuals and organizations are subject to different types of epidemic risks such as worms, viruses, spams, and botnets. To reduce the probability of risk, an Internet user generally invests in traditional security mechanisms like anti-virus and anti-spam software, sometimes also known as self-defense mechanisms. However, according...

    Provided By University of Southampton

  • White Papers // Jan 2011

    A Novel Cyber-Insurance for Internet Security

    Internet users such as individuals and organizations are subject to different types of epidemic risks such as worms, viruses, and botnets. To reduce the probability of risk, an Internet user generally invests in self-defense mechanisms like antivirus and antispam software. However, such software does not completely eliminate risk. Recent works...

    Provided By University of Southampton

  • White Papers // Apr 2011

    Modeling Internet Security Investments: The Case of Dealing with Information Uncertainty

    Modern distributed communication networks like the Internet and censorship-resistant networks (also a part of the Internet) are characterized by nodes (users) interconnected with one another via communication links. In this regard, the security of individual nodes depend not only on their own efforts, but also on the efforts and underlying...

    Provided By University of Southampton

  • White Papers // Oct 2009

    The Live Social Semantics Application: A Platform for Integrating Face-to-Face Presence with On-Line Social Networking

    The authors describe a novel application that integrates real-world data on the face-to-face proximity of individuals with their identities and contacts in on-line social networks. This application was successfully deployed at two conference gatherings, ESWC09 and HT2009, and actively used by hundreds of people. Personal profiles of the participants were...

    Provided By University of Southampton

  • White Papers // Mar 2009

    Enriching Lifelong User Modelling with the Social e-Networking and e-Commerce "Pieces of the Puzzle"

    Lifelong User Modeling (LUM) is a long-term vision which is a critical element in achieving lifelong personalized learning. One of the key factors for enabling LUM is making the user models scrutable, a feature used for allowing users to inspect and alter the modeling process. A Scrutable User Modeling Infrastructure...

    Provided By University of Southampton

  • White Papers // Jun 2013

    Rethinking Data Management for Big Data Scientific Workflows

    Scientific workflows consist of tasks that operate on input data to generate new data products that are used by subsequent tasks. Workflow management systems typically stage data to computational sites before invoking the necessary computations. In some cases data may be accessed using remote I/O. There are limitations with these...

    Provided By University of Southampton

  • White Papers // Apr 2013

    Comparing FutureGrid, Amazon EC2, and Open Science Grid for Scientific Workflows

    Scientists have a number of computing infrastructures available to conduct their research, including grids and public or private clouds. This paper explores the use of these cyber-infrastructures to execute scientific workflows, an important class of scientific applications. It examines the benefits and drawbacks of cloud and grid systems using the...

    Provided By University of Southampton

  • White Papers // Jul 2012

    Using Clouds for Science, Is It Just Kicking the Can Down the Road?

    Over the past decade grid computing has been put forward as a platform for conducting science. The authors have seen both tightly and loosely coupled parallel applications making use of national and international infrastructures such as the Open Science Grid (OSG), TeraGrid, EGI, and others. These applications have been developed...

    Provided By University of Southampton

  • White Papers // Nov 2009

    Scientific Workflow Applications on Amazon EC2

    The proliferation of commercial cloud computing providers has generated significant interest in the scientific computing community. Much recent paper has attempted to determine the benefits and drawbacks of cloud computing for scientific applications. Although clouds have many attractive features, such as virtualization, on-demand provisioning, and \"Pay as the user go\"...

    Provided By University of Southampton

  • White Papers // Oct 2008

    Resource Provisioning Options for Large-Scale Scientific Workflows

    Scientists in many fields are developing large-scale workflows containing millions of tasks and requiring thousands of hours of aggregate computation time. Acquiring the computational resources to execute these workflows poses many challenges for application developers. Although the grid provides ready access to large pools of computational resources, the traditional approach...

    Provided By University of Southampton

  • White Papers // Apr 2013

    Event Recommendation in Social Networks with Linked Data Enablement

    In recent years, social networking services have gained phenomenal popularity. They allow the authors to explore the world and share their findings in a convenient way. Event is a critical component in social networks. A user can create, share or join different events in their social circle. In this paper,...

    Provided By University of Southampton

  • White Papers // Sep 2011

    Interactively Mapping Data Sources into the Semantic Web

    The linked open data continues to grow rapidly, but a limitation of much of the data that is being published is the lack of a semantic description. While there are tools that help users to quickly convert a database into RDF, they do not provide a way to easily map...

    Provided By University of Southampton

  • White Papers // Aug 2013

    A Bayesian Game Formulation of Power Dissipation and Response Time Minimization in a Mobile Cloud Computing System

    The rapidly developing cloud computing and virtualization techniques provide mobile devices with battery energy saving opportunities by allowing them to offload computation and execute applications remotely. A mobile device should judiciously determine whether to offload computation and which portion of application should be offloaded to the cloud. This paper considers...

    Provided By University of Southampton

  • White Papers // Jul 2013

    Profit-Maximizing Resource Allocation for Multi-tier Cloud Computing Systems under Service Level Agreements

    Pervasive use of cloud computing and resulting rise in the number of hosting datacenters (which provide platform or software services to clients who do not have the means to set up and operate their own facilities) have brought forth many challenges including energy cost, peak power dissipation, cooling, carbon emission,...

    Provided By University of Southampton

  • White Papers // May 2012

    Portfolio Theory-Based Resource Assignment in a Cloud Computing System

    In this paper, the authors explain about the energy-aware resource management in a cloud computing system. Much of the existing work assumes that the resource requirements for various applications are known and given as scalar values. However, it is very difficult to know the exact resource requirements, and thus, it...

    Provided By University of Southampton

  • White Papers // Aug 2013

    Hierarchical Virtual Machine Consolidation in a Cloud Computing System

    Improving the energy efficiency of cloud computing systems has become an important issue because the electric energy bill for 24/7 operation of these systems can be quite large. The focus of this paper is on the Virtual Machine (VM) consolidation in a cloud computing system as a way of lowering...

    Provided By University of Southampton

  • White Papers // Dec 2013

    On Security Monitoring in SDNs A Strategic Outlook

    The recently proposed Software-Defined Networking (SDN) paradigm aims at enabling rapid innovations and reducing operational cost in the network equipments with the separation of the control and data plane. The network switches support the simple forwarding functions while the complex control logics are implemented in a logically centralized controller using...

    Provided By University of Southampton

  • White Papers // Sep 2009

    NED: A Novel Synthetic Traffic Pattern for Power/Performance Analysis of Network-on-Chips Using Negative Exponential Distribution

    In this paper, the authors present an empirically-derived synthetic traffic model based on the Negative Exponential Distribution (NED) for homogenous and heterogeneous Network-on-chips (NoCs) with any dimensionality. Compared to conventional synthetic traffic profiles, this synthetic traffic profile accurately captures key statistical behavior of realistic traces obtained by running different applications...

    Provided By University of Southampton

  • White Papers // Sep 2013

    Enabling High Performance Computing in Cloud Infrastructure using Virtualized GPUs

    With the advent of virtualization and Infrastructure-as-a-Service (IaaS), the broader scientific computing community is considering the use of clouds for their technical computing needs. This is due to the relative scalability, ease of use, advanced user environment customization abilities clouds provide, as well as many novel computing paradigms available for...

    Provided By University of Southampton

  • White Papers // Jul 2012

    Towards a High Performance Virtualized IaaS Deployment

    Scientific computing endeavors have created clusters, grids, and supercomputers as High Performance Computing (HPC) platforms and paradigms. These resources focus on peak performance and computing efficiency, thereby enabling scientific community to tackle non-trivial problems on massively parallel architectures. Meanwhile, efforts to leverage the economies of scale from data center operations...

    Provided By University of Southampton

  • White Papers // Aug 2013

    Evaluating Energy Efficiency of Floating Point Matrix Multiplication on FPGAs

    State-of-the-art FPGAs offer high operating frequency, unprecedented logic density and a host of other features. As FPGAs are programmed specifically for the problem to be solved, they can achieve higher performance with lower power consumption than general-purpose processors. Therefore, FPGA is a promising implementation technology for computationally intensive applications such...

    Provided By University of Southampton

  • White Papers // Jun 2011

    High-Performance and Compact Architecture for Regular Expression Matching on FPGA

    Regular Expression Matching (REM) is an important mechanism used by popular Network Intrusion Detection Systems (NIDS) such as Bro and Snort to perform deep packet inspection against potential threats. Due to the large number of patterns to scan for and the increasing bandwidth of network traffic, REM is becoming a...

    Provided By University of Southampton

  • White Papers // Jan 2013

    Optimizations and Analysis of BSP Graph Processing Models on Public Clouds

    Large-scale graph analytics is a central tool in many fields, and exemplifies the size and complexity of Big Data applications. Recent distributed graph processing frameworks utilize the venerable Bulk Synchronous Parallel (BSP) model and promise scalability for large graph analytics. This has been made popular by Google's Pregel, which offers...

    Provided By University of Southampton

  • White Papers // Sep 2013

    Towards Hybrid Online On-Demand Querying of Realtime Data with Stateful Complex Event Processing

    Emerging Big Data applications in areas like ecommerce and energy industry require both online and on-demand queries to be performed over vast and fast data arriving as streams. These present novel challenges to Big Data management systems. Complex Event Processing (CEP) is recognized as a high performance online query scheme...

    Provided By University of Southampton

  • White Papers // Jan 2014

    Energy-Efficient Median Filter on FPGA

    Median filters are a popular method for noise extraction, with much work done in the community to achieve high throughput and low hardware cost. In contrast, energy efficiency remains an untapped area for improvement though it has become a topic of increasing interest. The authors deduce memory to be the...

    Provided By University of Southampton

  • White Papers // Jan 2014

    Energy-Efficient Large-Scale Matrix Multiplication on FPGAs

    Energy efficiency has emerged as one of the key performance metrics in computing. In this paper, the authors present an energy efficient design for large-scale matrix multiplication. As a baseline architecture, they use a highly optimized on-chip matrix multiplication architecture extended to support large matrices using external memory. Based on...

    Provided By University of Southampton

  • White Papers // Oct 2013

    Energy-Efficient Architecture for Stride Permutation on Streaming Data

    Stride permutation is widely used in various digital signal processing algorithms when implementing on FPGAs. Permuting a long data sequence through hardware wiring leads to high area consumption and routing complexity. A more scalable approach is to build a hardware structure to permute streamed data inputs. In this paper, the...

    Provided By University of Southampton