University of Swaziland

Displaying 1-30 of 30 results

  • White Papers // Aug 2013

    MPHC: Privacy Preserving for Workflow Execution in Hybrid Clouds

    Cloud computing has developed from the demand of companies to deal with the execution cost of their complex distributed applications. Introducing the notion of hybrid clouds to the cloud computing paradigm brings out many challenges in resource provisioning of workflows. Hybrid clouds encounter the following two main obstacles in reaching...

    Provided By University of Swaziland

  • White Papers // Apr 2013

    HAT, not CAP: Towards Highly Available Transactions

    To provide high availability and low latency, many recent distributed data stores eschew strongly consistent semantics. While the CAP theorem is often interpreted to preclude the availability of transactions in a partition-prone environment, the authors show that highly available systems can provide useful transactional semantics, often matching those of today's...

    Provided By University of Swaziland

  • White Papers // Feb 2013

    Analytical Characterization of Computationally Efficient Localization Techniques

    Trilateration-based localization techniques have been widely used in sensor networks due to their computational efficiency and distributedness. However in sparse networks or in the boundary area of networks, trilateration-based techniques often fail to localize all localizable nodes. Bilateration-based techniques emerge as a generalization of trilateration techniques to a broader class...

    Provided By University of Swaziland

  • White Papers // Jan 2013

    A Brief Review of Cloud Computing, Challenges and Potential Solutions

    Cloud computing delivers IT Infrastructure as a Service (IaaS) promises attractive benefits, such as highly available scalable resources on demand without upfront investments or long-term contracts. Organizations making use of cloud computing can scale their IT infrastructure without actually operating and maintaining data centers, allowing them to operate with less...

    Provided By University of Swaziland

  • White Papers // Nov 2012

    On the Energy Efficiency of Self-Organizing LTE Cellular Access Networks

    Energy efficiency and self-organizing network architectures are the top issues for future cellular systems. In this paper, the authors propose an energy saving self-organizing access network architecture for Long Term Evolution (LTE) cellular systems. Self-organizing nature is attained through intelligent cooperation among the evolved Node Bs (eNBs) communicating via X2...

    Provided By University of Swaziland

  • White Papers // Nov 2012

    Distributed Multiple-Access for Wireless Communications: Compressed Sensing With Multiple Antennas

    This paper proposes a distributed multiple-access transmission scheme, designed to support the transmission of a small number of active nodes to a central base station when the total number of nodes is large. To achieve this, the authors propose the integration of multiple antenna technologies with compressed sensing algorithms. This...

    Provided By University of Swaziland

  • White Papers // Nov 2012

    A Primarily Survey on Energy Efficiency in Cloud and Distributed Computing Systems

    Research on low power systems has received a great amount of attention in recent years since the sustainability of current technologies and practices has become a serious issue. In the meantime, stiff increases in energy price and the environmental impact of carbon dioxide emissions associated with energy generation and transportation...

    Provided By University of Swaziland

  • White Papers // Oct 2012

    Localization in Wireless Sensor Networks by Constrained Simultaneous Perturbation Stochastic Approximation Technique

    Localization of sensor networks poses an immense challenge and is considered as a hot research topic in recent days. To address the accuracy on localization this paper proposes constrained Simultaneous Perturbation Stochastic Approximation (SPSA) based localization techniques for wireless sensor networks. A simple centralized localization algorithm using SPSA technique that...

    Provided By University of Swaziland

  • White Papers // Sep 2012

    Localization in Wireless Sensor Networks by Cross Entropy Method

    Wireless Sensor Network (WSN) localization technique remains an open research issue due to its challenges on reducing location estimation error and cost of localization algorithm itself. For a large mobile network localization cost becomes increasingly important due to the exponential increment of algorithmic cost. Conversely, sacrificing localization accuracy to a...

    Provided By University of Swaziland

  • White Papers // Sep 2012

    Multiple Frequency Selection in DVFS-Enabled Processors to Minimize Energy Consumption

    Research on low power systems has received a great amount of attention in recent years since the sustainability of current technologies and practices has become a serious issue. A few example systems where lowering power usage is critical are: wireless sensors, satellite circuits, robots and surveillance devices and cell phones...

    Provided By University of Swaziland

  • White Papers // Sep 2012

    A Model of Project and Organisational Dynamics

    The strategic, transformational nature of many information systems projects is now widely understood. Large-scale implementations of systems are known to require significant management of organizational change in order to be successful. Moreover, projects are rarely executed in isolation - most organizations have a large programme of projects being implemented at...

    Provided By University of Swaziland

  • White Papers // Jun 2012

    Improving Performance of Mobile Ad Hoc Networks Using Efficient Tactical on Demand Distance Vector (TAODV) Routing Algorithm

    In this paper, the authors present the design and performance evaluation of a new efficient on demand routing protocol for mobile ad-hoc networks. Up till now many routing algorithms have been proposed to solve the routing problem in mobile ad-hoc networks so it is difficult to compare the performance of...

    Provided By University of Swaziland

  • White Papers // May 2012

    A Near Optimal Routing Scheme for Multi-Hop Relay Networks Based on Viterbi Algorithm

    In a wireless multi-hop relay network, the optimal routing scheme with exhaustive path search entails high computational complexity and large storage requirement, and is impractical for a large number of hops. In this paper, the authors propose a suboptimal path selection scheme, based on Amplify-and-Forward (AF) protocol, that has outage...

    Provided By University of Swaziland

  • White Papers // May 2012

    An Iterative Beamforming Optimization Algorithm for Generalized MIMO Y Channels

    The authors consider a K-user Multiple-Input Multiple-Output (MIMO) relay channel, where each user sends K - 1 independent messages to the other K - 1 users via a common relay. All users and the relay are assumed to have multiple antennas. The communication happens in two time slots, the Multiple...

    Provided By University of Swaziland

  • White Papers // May 2012

    A Shadowing-Aware Density-Map for Location Estimation using COB in Non-Uniformly Populated Cellular Systems

    Estimating a mobile terminal's position using radio signals that are subject to Non-Line-Of-Sight (NLOS) propagation has long been recognized as a challenging problem. Conventional radiolocation techniques, namely Angle-Of-Arrival (AOA), Received Signal Strength (RSS), and Time-[Difference]-Of-Arrival (T[D]OA) are based on the assumption that signals propagate through Line-Of-Sight (LOS) paths. However, in...

    Provided By University of Swaziland

  • White Papers // May 2012

    A Self-Organizing Cooperative Heterogeneous Cellular Access Network for Energy Conservation

    In this paper, the authors propose a cooperative and selforganizing energy efficient access network framework for heterogeneous cellular systems. Intranetwork and internetwork cooperation are jointly employed for optimizing the energy savings. In intranetwork cooperation, based on the instantaneous traffic, Base Transceiver Stations (BTSs) in a network cooperatively and intelligently swap...

    Provided By University of Swaziland

  • White Papers // Apr 2012

    Event Aware Elasticity Control for Cloud Applications

    A distinctive component of cloud-based applications is the elasticity control. This component facilitates the adaptation necessary for an application to maintain service quality in the presence of fluctuating demand. Elasticity control achieves this adaptation at runtime by managing the expansion and contraction of resource capacity in response to demand. How...

    Provided By University of Swaziland

  • White Papers // Mar 2012

    Distributed Stable Matching Algorithm for Physical Layer Security With Multiple Source-Destination Pairs and Jammer Nodes

    In wireless communications, the physical layer security is an emerging security research area that explores the possibilities of achieving high secrecy data transmission between source-destination nodes, while malicious eavesdroppers will obtain zero information from the source nodes. In this paper the authors consider enhancing the security level of a network...

    Provided By University of Swaziland

  • White Papers // Oct 2011

    A Decade of Database Conferences: A Look Inside the Program Committees

    Database management technology has played a vital role in facilitating key advancements of the information technology field. Database researchers - and computer scientists in general - consider prestigious conferences as their favorite and effective tools for presenting their original research study and for getting good publicity. With the main aim...

    Provided By University of Swaziland

  • White Papers // May 2011

    Collaborative Process Modelling - Tool Analysis and Design Implications

    Business process modelling is an integral component of Business Process Management and is, by nature, a collaborative act that involves many stakeholders. Process modelling initiatives, while not able dependent on technology, are often supported by one or more dedicated commercial software tools. However, while a broad range of process modelling...

    Provided By University of Swaziland

  • White Papers // Sep 2010

    Cooperative Amplify-and-Forward Relaying in Cognitive Radio Networks

    In this paper, the authors consider an underlay cognitive radio network consisting of a Primary Transmitter (PT), a Primary Receiver (PR), a Secondary Transmitter (ST) and a Secondary Receiver (SR). They propose a two time slot spectrum sharing scheme based on cooperative relay transmission in addition to a practical design...

    Provided By University of Swaziland

  • White Papers // Jun 2010

    Service Learning and Teaching Foundry: A Virtual SOA/BPM Learning and Teaching Community

    With the growing presence of BPM and SOA in the IT industry, their impact on the IT education will be profound. Many institutions are becoming aware of the acute need of developing learning and teaching resource frameworks for the BPM and SOA. In this paper, the authors present part of...

    Provided By University of Swaziland

  • White Papers // Mar 2010

    Accountability as a Service for the Cloud

    Computing resource provisioning through the use of the Cloud computing paradigm has triggered revolutions in modern day computing. It is a new paradigm for deploying services on rented machines. On the other hand, Service Oriented Architecture (SOA) has gained wide adoption among organizations due to the importance of collaborations and...

    Provided By University of Swaziland

  • White Papers // Oct 2009

    Performance Analysis of Physical Layer Network Coding in Two-Way Relay Channels

    In this paper, the authors investigate the performance of practical Physical Layer Network Coding (PLNC) schemes for two-way relay channels. They consider a network consisting of two source nodes and a single relay node, which is used to aid communication between the two source nodes. For this scenario, they investigate...

    Provided By University of Swaziland

  • White Papers // Jul 2009

    Effects of ES-Enabled Standardization and Integration on Business Process Agility

    Agility has become a key organizational capability today as businesses face an uncertain and volatile environment. Enterprise systems, a key component of IT infrastructure in a majority of organizations today, have delivered cost efficiencies, control and consistent execution. Using a case study approach, this research reports on the investigation of...

    Provided By University of Swaziland

  • White Papers // Jul 2009

    Estimation of a Probability of Interference in a Cellular Communication Network Using the Monte-Carlo Technique

    A Monte-Carlo technique based methodology for the estimation of a probability of interference in a cellular communication network is presented. This probability is considered for the case of mobile to base (Up Link or Reverse channel) and base to mobile (Down Link or Forward channel) interferences. The effect of random...

    Provided By University of Swaziland

  • White Papers // Jan 2009

    Data Management for High-Throughput Genomics

    Today's sequencing technology allows sequencing an individual genome within a few weeks for a fraction of the costs of the original Human Genome project. Genomics labs are faced with dozens of TB of data per week that have to be automatically processed and made available to scientists for further analysis....

    Provided By University of Swaziland

  • White Papers // Sep 2008

    Knowledge-Based Repair for Knowledge-Lean Techniques in Non-Routine Design

    In this paper, the authors present a methodology for producing good design solutions more efficiently. The methodology is based on augmenting a conventional evolutionary design approach with a method for improving suboptimal design solutions with a domain-specific knowledge-rich approach. This approach is based conceptually on the practice of plastic surgery,...

    Provided By University of Swaziland

  • White Papers // Jun 2008

    Extending the Boundaries of Business Process Management: From Operational to Creative Business Processes

    In very recent times, organizations are starting to shift their focus from highly standardized operational Business Processes (BPs) to other types of processes that cannot be easily replicated due to the knowledge, skills and creativity of people involved. The paper introduces the knowledge dimension of creative BPs and uses it...

    Provided By University of Swaziland

  • White Papers // Oct 2006

    Do Enterprise Systems Enable Supply Chain Integration

    Features of ERP systems such as standardized business processes, data integrity, real-time availability, visibility and processing capability of information are expected to create an excellent backdrop for embarking on integration with external partners in the supply chain. This paper reports on the enabling role of ERP systems in achieving supply...

    Provided By University of Swaziland

  • White Papers // Nov 2012

    On the Energy Efficiency of Self-Organizing LTE Cellular Access Networks

    Energy efficiency and self-organizing network architectures are the top issues for future cellular systems. In this paper, the authors propose an energy saving self-organizing access network architecture for Long Term Evolution (LTE) cellular systems. Self-organizing nature is attained through intelligent cooperation among the evolved Node Bs (eNBs) communicating via X2...

    Provided By University of Swaziland

  • White Papers // Nov 2012

    Distributed Multiple-Access for Wireless Communications: Compressed Sensing With Multiple Antennas

    This paper proposes a distributed multiple-access transmission scheme, designed to support the transmission of a small number of active nodes to a central base station when the total number of nodes is large. To achieve this, the authors propose the integration of multiple antenna technologies with compressed sensing algorithms. This...

    Provided By University of Swaziland

  • White Papers // Sep 2008

    Knowledge-Based Repair for Knowledge-Lean Techniques in Non-Routine Design

    In this paper, the authors present a methodology for producing good design solutions more efficiently. The methodology is based on augmenting a conventional evolutionary design approach with a method for improving suboptimal design solutions with a domain-specific knowledge-rich approach. This approach is based conceptually on the practice of plastic surgery,...

    Provided By University of Swaziland

  • White Papers // Jun 2012

    Improving Performance of Mobile Ad Hoc Networks Using Efficient Tactical on Demand Distance Vector (TAODV) Routing Algorithm

    In this paper, the authors present the design and performance evaluation of a new efficient on demand routing protocol for mobile ad-hoc networks. Up till now many routing algorithms have been proposed to solve the routing problem in mobile ad-hoc networks so it is difficult to compare the performance of...

    Provided By University of Swaziland

  • White Papers // Oct 2009

    Performance Analysis of Physical Layer Network Coding in Two-Way Relay Channels

    In this paper, the authors investigate the performance of practical Physical Layer Network Coding (PLNC) schemes for two-way relay channels. They consider a network consisting of two source nodes and a single relay node, which is used to aid communication between the two source nodes. For this scenario, they investigate...

    Provided By University of Swaziland

  • White Papers // Mar 2010

    Accountability as a Service for the Cloud

    Computing resource provisioning through the use of the Cloud computing paradigm has triggered revolutions in modern day computing. It is a new paradigm for deploying services on rented machines. On the other hand, Service Oriented Architecture (SOA) has gained wide adoption among organizations due to the importance of collaborations and...

    Provided By University of Swaziland

  • White Papers // Jun 2010

    Service Learning and Teaching Foundry: A Virtual SOA/BPM Learning and Teaching Community

    With the growing presence of BPM and SOA in the IT industry, their impact on the IT education will be profound. Many institutions are becoming aware of the acute need of developing learning and teaching resource frameworks for the BPM and SOA. In this paper, the authors present part of...

    Provided By University of Swaziland

  • White Papers // Jun 2008

    Extending the Boundaries of Business Process Management: From Operational to Creative Business Processes

    In very recent times, organizations are starting to shift their focus from highly standardized operational Business Processes (BPs) to other types of processes that cannot be easily replicated due to the knowledge, skills and creativity of people involved. The paper introduces the knowledge dimension of creative BPs and uses it...

    Provided By University of Swaziland

  • White Papers // May 2011

    Collaborative Process Modelling - Tool Analysis and Design Implications

    Business process modelling is an integral component of Business Process Management and is, by nature, a collaborative act that involves many stakeholders. Process modelling initiatives, while not able dependent on technology, are often supported by one or more dedicated commercial software tools. However, while a broad range of process modelling...

    Provided By University of Swaziland

  • White Papers // Oct 2006

    Do Enterprise Systems Enable Supply Chain Integration

    Features of ERP systems such as standardized business processes, data integrity, real-time availability, visibility and processing capability of information are expected to create an excellent backdrop for embarking on integration with external partners in the supply chain. This paper reports on the enabling role of ERP systems in achieving supply...

    Provided By University of Swaziland

  • White Papers // Jul 2009

    Effects of ES-Enabled Standardization and Integration on Business Process Agility

    Agility has become a key organizational capability today as businesses face an uncertain and volatile environment. Enterprise systems, a key component of IT infrastructure in a majority of organizations today, have delivered cost efficiencies, control and consistent execution. Using a case study approach, this research reports on the investigation of...

    Provided By University of Swaziland

  • White Papers // Jan 2009

    Data Management for High-Throughput Genomics

    Today's sequencing technology allows sequencing an individual genome within a few weeks for a fraction of the costs of the original Human Genome project. Genomics labs are faced with dozens of TB of data per week that have to be automatically processed and made available to scientists for further analysis....

    Provided By University of Swaziland

  • White Papers // Aug 2013

    MPHC: Privacy Preserving for Workflow Execution in Hybrid Clouds

    Cloud computing has developed from the demand of companies to deal with the execution cost of their complex distributed applications. Introducing the notion of hybrid clouds to the cloud computing paradigm brings out many challenges in resource provisioning of workflows. Hybrid clouds encounter the following two main obstacles in reaching...

    Provided By University of Swaziland

  • White Papers // Apr 2013

    HAT, not CAP: Towards Highly Available Transactions

    To provide high availability and low latency, many recent distributed data stores eschew strongly consistent semantics. While the CAP theorem is often interpreted to preclude the availability of transactions in a partition-prone environment, the authors show that highly available systems can provide useful transactional semantics, often matching those of today's...

    Provided By University of Swaziland

  • White Papers // Jan 2013

    A Brief Review of Cloud Computing, Challenges and Potential Solutions

    Cloud computing delivers IT Infrastructure as a Service (IaaS) promises attractive benefits, such as highly available scalable resources on demand without upfront investments or long-term contracts. Organizations making use of cloud computing can scale their IT infrastructure without actually operating and maintaining data centers, allowing them to operate with less...

    Provided By University of Swaziland

  • White Papers // Sep 2012

    Multiple Frequency Selection in DVFS-Enabled Processors to Minimize Energy Consumption

    Research on low power systems has received a great amount of attention in recent years since the sustainability of current technologies and practices has become a serious issue. A few example systems where lowering power usage is critical are: wireless sensors, satellite circuits, robots and surveillance devices and cell phones...

    Provided By University of Swaziland

  • White Papers // Apr 2012

    Event Aware Elasticity Control for Cloud Applications

    A distinctive component of cloud-based applications is the elasticity control. This component facilitates the adaptation necessary for an application to maintain service quality in the presence of fluctuating demand. Elasticity control achieves this adaptation at runtime by managing the expansion and contraction of resource capacity in response to demand. How...

    Provided By University of Swaziland

  • White Papers // Oct 2011

    A Decade of Database Conferences: A Look Inside the Program Committees

    Database management technology has played a vital role in facilitating key advancements of the information technology field. Database researchers - and computer scientists in general - consider prestigious conferences as their favorite and effective tools for presenting their original research study and for getting good publicity. With the main aim...

    Provided By University of Swaziland

  • White Papers // Jul 2009

    Estimation of a Probability of Interference in a Cellular Communication Network Using the Monte-Carlo Technique

    A Monte-Carlo technique based methodology for the estimation of a probability of interference in a cellular communication network is presented. This probability is considered for the case of mobile to base (Up Link or Reverse channel) and base to mobile (Down Link or Forward channel) interferences. The effect of random...

    Provided By University of Swaziland

  • White Papers // Sep 2010

    Cooperative Amplify-and-Forward Relaying in Cognitive Radio Networks

    In this paper, the authors consider an underlay cognitive radio network consisting of a Primary Transmitter (PT), a Primary Receiver (PR), a Secondary Transmitter (ST) and a Secondary Receiver (SR). They propose a two time slot spectrum sharing scheme based on cooperative relay transmission in addition to a practical design...

    Provided By University of Swaziland

  • White Papers // May 2012

    A Near Optimal Routing Scheme for Multi-Hop Relay Networks Based on Viterbi Algorithm

    In a wireless multi-hop relay network, the optimal routing scheme with exhaustive path search entails high computational complexity and large storage requirement, and is impractical for a large number of hops. In this paper, the authors propose a suboptimal path selection scheme, based on Amplify-and-Forward (AF) protocol, that has outage...

    Provided By University of Swaziland

  • White Papers // May 2012

    An Iterative Beamforming Optimization Algorithm for Generalized MIMO Y Channels

    The authors consider a K-user Multiple-Input Multiple-Output (MIMO) relay channel, where each user sends K - 1 independent messages to the other K - 1 users via a common relay. All users and the relay are assumed to have multiple antennas. The communication happens in two time slots, the Multiple...

    Provided By University of Swaziland

  • White Papers // May 2012

    A Shadowing-Aware Density-Map for Location Estimation using COB in Non-Uniformly Populated Cellular Systems

    Estimating a mobile terminal's position using radio signals that are subject to Non-Line-Of-Sight (NLOS) propagation has long been recognized as a challenging problem. Conventional radiolocation techniques, namely Angle-Of-Arrival (AOA), Received Signal Strength (RSS), and Time-[Difference]-Of-Arrival (T[D]OA) are based on the assumption that signals propagate through Line-Of-Sight (LOS) paths. However, in...

    Provided By University of Swaziland

  • White Papers // May 2012

    A Self-Organizing Cooperative Heterogeneous Cellular Access Network for Energy Conservation

    In this paper, the authors propose a cooperative and selforganizing energy efficient access network framework for heterogeneous cellular systems. Intranetwork and internetwork cooperation are jointly employed for optimizing the energy savings. In intranetwork cooperation, based on the instantaneous traffic, Base Transceiver Stations (BTSs) in a network cooperatively and intelligently swap...

    Provided By University of Swaziland

  • White Papers // Mar 2012

    Distributed Stable Matching Algorithm for Physical Layer Security With Multiple Source-Destination Pairs and Jammer Nodes

    In wireless communications, the physical layer security is an emerging security research area that explores the possibilities of achieving high secrecy data transmission between source-destination nodes, while malicious eavesdroppers will obtain zero information from the source nodes. In this paper the authors consider enhancing the security level of a network...

    Provided By University of Swaziland

  • White Papers // Nov 2012

    A Primarily Survey on Energy Efficiency in Cloud and Distributed Computing Systems

    Research on low power systems has received a great amount of attention in recent years since the sustainability of current technologies and practices has become a serious issue. In the meantime, stiff increases in energy price and the environmental impact of carbon dioxide emissions associated with energy generation and transportation...

    Provided By University of Swaziland

  • White Papers // Sep 2012

    A Model of Project and Organisational Dynamics

    The strategic, transformational nature of many information systems projects is now widely understood. Large-scale implementations of systems are known to require significant management of organizational change in order to be successful. Moreover, projects are rarely executed in isolation - most organizations have a large programme of projects being implemented at...

    Provided By University of Swaziland

  • White Papers // Feb 2013

    Analytical Characterization of Computationally Efficient Localization Techniques

    Trilateration-based localization techniques have been widely used in sensor networks due to their computational efficiency and distributedness. However in sparse networks or in the boundary area of networks, trilateration-based techniques often fail to localize all localizable nodes. Bilateration-based techniques emerge as a generalization of trilateration techniques to a broader class...

    Provided By University of Swaziland

  • White Papers // Oct 2012

    Localization in Wireless Sensor Networks by Constrained Simultaneous Perturbation Stochastic Approximation Technique

    Localization of sensor networks poses an immense challenge and is considered as a hot research topic in recent days. To address the accuracy on localization this paper proposes constrained Simultaneous Perturbation Stochastic Approximation (SPSA) based localization techniques for wireless sensor networks. A simple centralized localization algorithm using SPSA technique that...

    Provided By University of Swaziland

  • White Papers // Sep 2012

    Localization in Wireless Sensor Networks by Cross Entropy Method

    Wireless Sensor Network (WSN) localization technique remains an open research issue due to its challenges on reducing location estimation error and cost of localization algorithm itself. For a large mobile network localization cost becomes increasingly important due to the exponential increment of algorithmic cost. Conversely, sacrificing localization accuracy to a...

    Provided By University of Swaziland