University of Southampton

Displaying 1-40 of 173 results

  • White Papers // Mar 2015

    RDF-Hunter: Automatically Crowdsourcing the Execution of Queries Against RDF Data Sets

    In the last years, a large number of RDF data sets have become available on the web. However, due to the semi-structured nature of RDF data, missing values affect answer completeness of queries that are posed against this data. In this paper, the authors propose RDF-Hunter, a novel hybrid query...

    Provided By University of Southampton

  • White Papers // Jun 2014

    Floe: A Continuous Dataflow Framework for Dynamic Cloud Applications

    Applications in cyber-physical systems are increasingly coupled with online instruments to perform long-running, continuous data processing. Such \"Always on\" dataflow applications are dynamic, where they need to change the applications logic and performance at runtime, in response to external operational needs. Floe is a continuous dataflow framework that is designed...

    Provided By University of Southampton

  • White Papers // May 2014

    Caching Eliminates the Wireless Bottleneck in Video-Aware Wireless Networks

    Cellular data traffic almost doubles every year, greatly straining network capacity. The main driver for this development is wireless video. Traditional methods for capacity increase (like using more spectrum and increasing base station density) are very costly, and do not exploit the unique features of video, in particular a high...

    Provided By University of Southampton

  • 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

    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 // 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 // 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 // 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 2012

    Integrating High Performance File Systems in a Cloud Computing Environment

    In this paper, the authors outline their ongoing efforts to effectively integrate a parallel file system in a cloud environment. They investigate how a Parallel file System (PFS) can be effectively integrated and provided as a service to cloud users running High Performance Computing (HPC) applications, and what would be...

    Provided By University of Southampton

  • White Papers // May 2012

    Energy-Efficient Virtual Machine Replication and Placement in a Cloud Computing System

    By utilizing Virtual Machines (VM) and doing server consolidation in a datacenter, a cloud provider can reduce the total energy consumption for servicing his clients with little performance degradation. In particular, the cloud provider can take advantage of dissimilar workloads and by assigning these workloads to the same server, can...

    Provided By University of Southampton

  • White Papers // Apr 2009

    Sustainable Archiving and Storage Management of Audiovisual Digital Assets

    With the advent of end-to-end tapeless production and distribution, the whole concept of what it means to archive audiovisual content is being challenged. The traditional role of the archive as a repository for material after broadcast is changing because of digital file-based technologies and high speed networking. Rather than being...

    Provided By University of Southampton

  • White Papers // May 2009

    SemWeB Semantic Web Browser - Improving Browsing Experience With Semantic and Personalized Information and Hyperlinks

    Imagine a Web browser that can understand the context of a Web page and recommends related semantic hyperlinks in any Web domain. In addition, imagine this browser also understands one's browsing needs and personalizes information for the user. The aim of the research is to achieve this in open Web...

    Provided By University of Southampton

  • White Papers // May 2010

    Experiences Using the UML Profile for MARTE to Stochastically Model Post-Production Interactive Applications

    This paper describes a practical approach applying the UML 2.0 standard MARTE profile to model stochastic interactive application workflows, using the PapyrusUML editor. The paper uses the PaStep, PaCommStep, PaLogicalResource and GaCommHost MARTE stereotypes and find them sufficient for stochastic modelling with the exception of being unable to define non-standard...

    Provided By University of Southampton

  • White Papers // Jan 2010

    Implementations of Virtual Organization in the Wireless Home Networking Environments

    The objective and motivation for this paper is to simplify the deployment for Virtual Organization (VO) and investigate the possibilities to deploy in smaller areas and in the Wireless Local Area (WLAN) environments. This paper demonstrates a break-through in the current deployment, where large numbers of computers, software, resources, people...

    Provided By University of Southampton

  • White Papers // Aug 2010

    Cloud Business Models and Sustainability: Impacts for Businesses and e-Research

    Cloud Computing provides added value for organisations; saving costs in operations, resources and staff - as well as new business opportunities for service-oriented models. Achieving long-term sustainability is an important success factor for organisations, as failures to do so may result in Internet bubbles or crashes experienced in 2000s. This...

    Provided By University of Southampton

  • White Papers // Mar 2010

    A Categorisation of Cloud Computing Business Models

    This paper reviews current cloud computing business models and presents proposals on how organizations can achieve sustainability by adopting appropriate models. One classify cloud computing business models into eight types: Service Provider and Service Orientation; Support and Services Contracts; In-House Private Clouds; All-In-One Enterprise Cloud; One-Stop Resources and Services; Government...

    Provided By University of Southampton

  • White Papers // Jan 2010

    Designing Energy-Aware Adaptive Routing for Wireless Sensor Networks

    Many energy-aware routing protocols take into account the residual battery power in sensor nodes or/and the energy required for transmission along the path. In the deployment of an environmental sensor network, authors observed that applications may also impose requirements on routing, thus placing higher demands on protocol design. Authors demonstrated...

    Provided By University of Southampton

  • White Papers // Oct 2010

    Electronic Book of Network Security: Introduction to Network Security

    Technology is now widely used in a variety of educational support situations to improve the quality of education. It can be used to redress the imbalances of the old system and help in developing new teaching and learning strategies. The basis of this project is to design and develop an...

    Provided By University of Southampton

  • White Papers // Jun 2010

    Using Cloud for Research: A Technical Review

    The purpose of the TeciRes project was to conduct a technical review of the current landscape within cloud computing to establish the extent to which existing solutions meet encountered and envisioned requirements for using emerging cloud technologies, in particular those which enable computing and storage cloud facilities for research in...

    Provided By University of Southampton

  • White Papers // May 2009

    An Analysis Of The Applicability Of Credit Scoring For Microfinance

    Credit scoring has been successfully applied in domains as mortgage loans and credit cards. This paper analyzes whether credit scoring should be adopted in microfinance institutions. Previous research on credit scoring in the microfinance field was mostly situated in Latin America and Southern Africa. To the best of the knowledge,...

    Provided By University of Southampton

  • White Papers // Jan 2011

    Distributed Downlink Multi-Cell Processing Requiring Reduced-Rate Back-Haul Data Exchange

    Different-complexity Multi-Cell Processing (MCP) schemes employing Distributed Signal-to-Interference-Leakage-plus-Noise-Ratio (SILNR) pre-coding techniques are proposed, which require reduced back-haul data exchange in comparison to the conventional-MCP structure. The authors' results demonstrate that the proposed structures are capable of increasing the achievable cell-edge throughput and offering different geographic rate profile distributions as well...

    Provided By University of Southampton

  • White Papers // Jan 2012

    Power Versus Bandwidth Efficiency in Wireless Communications: The Economic Perspective

    The authors carry out a comprehensive analysis of a range of wireless network efficiency considerations. Firstly, they explore the properties and the implications of the power-versus bandwidth efficiency criteria. Secondly, they perform a detailed top-down analysis of a typical commercial wireless network, which emphasizes the inherent differences between the aforementioned...

    Provided By University of Southampton

  • White Papers // Feb 2010

    Secure Naming for a Network of Information

    Several projects propose an information-centric approach to the network of the future. Such an approach makes efficient content distribution possible by making information retrieval host-independent and integrating into the network storage for caching information. Requests for particular content can, thus, be satisfied by any host or server holding a copy....

    Provided By University of Southampton

  • White Papers // May 2012

    Supercapacitor Leakage in Energy-Harvesting Sensor Nodes: Fact or Fiction?

    As interest in energy-harvesting sensor nodes continues to grow, the use of super-capacitors as energy stores or buffers is gaining popularity. The reasons for their use are numerous, and include their high power density, simple interfacing requirements, simpler measurement of state-of-charge, and a greater number of charging cycles than secondary...

    Provided By University of Southampton

  • White Papers // Apr 2012

    Design and Comparative Analysis of Single-Path and Epidemic Approaches to Information and Energy Management in Wireless Sensor Networks

    Intelligent energy management is a key challenge in Wireless Sensor Networks. The choice of an appropriate routing algorithm constitutes a critical factor, especially in unstructured networks where, due to their dynamic nature, a reactive routing protocol is necessary. Such networks often favor packet flooding to fulfill this need. One such...

    Provided By University of Southampton

  • White Papers // Mar 2012

    Towards a Principled and Evolvable Approach to Software Development for Future Wireless Sensor Networks

    Due to the operational demands and requirements diversity in Wireless Sensor Networks (WSNs), great improvements in the software engineering process are required. As WSNs increasingly become essential, even critical, components in Systems-of-Systems (SoSs), the case for verification in the development process is strong. In this paper, the authors present their...

    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 // 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 // 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 // Jan 2011

    Assessing Value Creation and Value Capture in Digital Business Ecosystems

    Interest in business modeling of technology enterprises - the activity of designing the architecture for revenues, costs, products and/or services delivery and the overall value of an enterprise - has risen to prominence with the global crossing of the Internet chasm. However, as several studies have pointed out, the investigations...

    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 // 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