University of Johannesburg

Displaying 1-17 of 17 results

  • White Papers // Sep 2013

    Cloud Computing Challenges with Emphasis on Amazon EC2 and Windows Azure

    Cloud Computing has received much attention by the IT-Business world. As compared to the common computing platforms, cloud computing is more flexible in supporting real-time computation and is considered a more powerful model for hosting and delivering services over the Internet. However, since cloud computing is still at its infancy,...

    Provided By University of Johannesburg

  • White Papers // Jul 2013

    Data Warehouse Success and Strategic Oriented Business Intelligence: A Theoretical Framework

    With the proliferation of the data warehouses as supportive decision making tools, organizations are increasingly looking forward for a complete data warehouse success model that would manage the enormous amounts of growing data. It is therefore important to measure the success of these massive projects. While general is success models...

    Provided By University of Johannesburg

  • White Papers // May 2012

    Opportunistic Routing in Multi-Rate Multi-Hop Ad Hoc Networks

    Opportunistic routing has recently been proposed for ad hoc networks. Several works showed that opportunistic routing improves network performance. None of these works, however, studied the integration of opportunistic routing into multi-rate ad hoc networks. In this paper, the authors study this integration. Specifically, they consider the problem of determining...

    Provided By University of Johannesburg

  • White Papers // May 2012

    Testing and Evaluation of a Secure Integrity Measurement System (SIMS) for Remote Systems

    The authors have designed a novel system called a Secure Integrity Measurement System (SIMS) to provide a practical integrity for flexible and traditional remote systems. SIMS is not only targeted for Linux, but it can also be used for different operating systems such as Windows, and UNIX. All and executable...

    Provided By University of Johannesburg

  • White Papers // Feb 2012

    Synchronization and Cell Search Algorithms in 3GPP Long Term Evolution Systems (FDD Mode)

    In this paper initial downlink synchronization (sync) and cell identification algorithms for the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems are presented. The frequency division duplex (FDD) mode is used in the downlink radio frame structure. A user equipment digital receiver architecture is proposed. The orthogonality of...

    Provided By University of Johannesburg

  • White Papers // Feb 2012

    Safety Aspects in the Distance Learning Systems

    In this paper, the authors study the problems of improving the degree of information security in the Distance Learning Systems (DLS) at the expense of using innovative methods and technologies of Information Security Systems (ISS). In this paper, they are also considered the recommendations for improving existing DLS in training...

    Provided By University of Johannesburg

  • White Papers // Nov 2011

    Influence of a Realistic Loading on Characteristics and Design of ESPAR

    The paper presents results of a study considering a 2.4 GHz low-cost low-power-consumption Electronically Switched Parasitic Array Radiator (ESPAR) antenna suitable for wireless sensor networks and rural applications. The paper discuses the effects of realistic versus ideal loads in the process of modeling and design on the example of a...

    Provided By University of Johannesburg

  • White Papers // May 2011

    Aftercare Of Inward Foreign Direct Investment: A Case Study Of South Africa

    Attraction of new inward Foreign Direct Investment (FDI) globally, especially in the developing countries, is problematic. Economic development practitioners have recently started to prioritise the retention and growing of existing investments to enhance their economic development agenda. The purpose of this paper is to analyze and investigate the relationship between...

    Provided By University of Johannesburg

  • White Papers // Nov 2010

    Artificial Intelligence in Reverse Supply Chain Management

    Product take-back legislation forces manufacturers to bear the costs of collection and disposal of products that have reached the end of their useful lives. In order to reduce these costs, manufacturers can consider reuse, remanufacturing and/or recycling of components as an alternative to disposal. The implementation of such alternatives usually...

    Provided By University of Johannesburg

  • White Papers // Nov 2010

    Use of Data Mining in Scheduler Optimization

    The operating system's role in a computer system is to manage the various resources. One of these resources is the CPU (Central Processing Unit). It is managed by a component of the operating system called the CPU scheduler. Schedulers are optimized for typical workloads expected to run on the platform....

    Provided By University of Johannesburg

  • White Papers // Aug 2010

    Intelligent Mobile Sensing and Analysis Research Network in South Africa - Building a Base at the CSIR

    Intelligent capturing and secure communication of physiological and environmental data to central point of presence in large magnitude is crucial in the design of accurate models of natural and man-made systems or processes. The research network aims to utilize ubiquitous mobile phone devices, integrated with built-in or externally connected sensor...

    Provided By University of Johannesburg

  • White Papers // Jul 2010

    A Method of Electronic Beam Steering for Circular Switched Parasitic Dipole Arrays

    This paper presents a method of electronic beam steering for a smart antenna system based on a switched parasitic array. The antenna system is made up of circular array of half wave dipoles, with four parasitic elements positioned equidistantly, surrounding one active central element. All parasitic elements are assumed to...

    Provided By University of Johannesburg

  • White Papers // Jul 2010

    A Structural Parameter Based Modification of Energy Conscious ESPAR Antenna System through Optimization for WLAN's Dual-Band Operability

    Phased array antenna's radiation pattern can be electronically controlled, which makes them relevant solution for multipath interference. Electronically Steerable Parasitic Array Radiator (ESPAR) antenna systems are part of the family of phased array antenna under the umbrella of aerial beam-forming antennas. Generally ESPAR antenna system design considers the quarter wavelength...

    Provided By University of Johannesburg

  • White Papers // May 2010

    Principles of Increasing the Output Power of a Fiber Laser

    In the paper, the authors present research on how to increase the output power of a fiber laser. A fiber laser is a laser in which the active gain medium or the laser medium is an optical fiber usually doped with rare-earth elements such as erbium, ytterbium, and neodymium. The...

    Provided By University of Johannesburg

  • White Papers // Aug 2009

    Design of Energy Conscious Antenna System for WLAN Frequency Band

    The Electronically Steerable Parasitic Array Radiator (ESPAR) antenna system is configured with one feed radiating element and N-parasitic radiating elements. The radiation pattern is electronically controlled by means of the variable devices loading the parasitic elements. These imply the achievement of low power antenna system with low fabrication cost. The...

    Provided By University of Johannesburg

  • White Papers // Apr 2009

    Monetary Policy And Long-Term Interest Rates In South Africa

    This paper examines how the short-term and long-term interest rates react to supply, demand and monetary policy shocks in South Africa. Use is made of the impulse response functions obtained from the structural vector autoregressive model with long-term restrictions. The authors' find a positive correlation between the two interest rates...

    Provided By University of Johannesburg

  • White Papers // Apr 2009

    Forward Exchange Rate Puzzle: Joining The Missing Pieces In The Rand-US Dollar Exchange Market

    The Unbiased Forward Rate Hypothesis (UFRH) stipulates that the forward rates should be a perfect predictor for the future spot rates. A number of studies have tested the UFRH and foreign market efficiency and concluded that the hypothesis does not hold. This phenomenon is known as the UFRH puzzle. A...

    Provided By University of Johannesburg

  • White Papers // Feb 2012

    Synchronization and Cell Search Algorithms in 3GPP Long Term Evolution Systems (FDD Mode)

    In this paper initial downlink synchronization (sync) and cell identification algorithms for the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems are presented. The frequency division duplex (FDD) mode is used in the downlink radio frame structure. A user equipment digital receiver architecture is proposed. The orthogonality of...

    Provided By University of Johannesburg

  • White Papers // Apr 2009

    Monetary Policy And Long-Term Interest Rates In South Africa

    This paper examines how the short-term and long-term interest rates react to supply, demand and monetary policy shocks in South Africa. Use is made of the impulse response functions obtained from the structural vector autoregressive model with long-term restrictions. The authors' find a positive correlation between the two interest rates...

    Provided By University of Johannesburg

  • White Papers // Nov 2010

    Use of Data Mining in Scheduler Optimization

    The operating system's role in a computer system is to manage the various resources. One of these resources is the CPU (Central Processing Unit). It is managed by a component of the operating system called the CPU scheduler. Schedulers are optimized for typical workloads expected to run on the platform....

    Provided By University of Johannesburg

  • White Papers // Nov 2010

    Artificial Intelligence in Reverse Supply Chain Management

    Product take-back legislation forces manufacturers to bear the costs of collection and disposal of products that have reached the end of their useful lives. In order to reduce these costs, manufacturers can consider reuse, remanufacturing and/or recycling of components as an alternative to disposal. The implementation of such alternatives usually...

    Provided By University of Johannesburg

  • White Papers // May 2011

    Aftercare Of Inward Foreign Direct Investment: A Case Study Of South Africa

    Attraction of new inward Foreign Direct Investment (FDI) globally, especially in the developing countries, is problematic. Economic development practitioners have recently started to prioritise the retention and growing of existing investments to enhance their economic development agenda. The purpose of this paper is to analyze and investigate the relationship between...

    Provided By University of Johannesburg

  • White Papers // Apr 2009

    Forward Exchange Rate Puzzle: Joining The Missing Pieces In The Rand-US Dollar Exchange Market

    The Unbiased Forward Rate Hypothesis (UFRH) stipulates that the forward rates should be a perfect predictor for the future spot rates. A number of studies have tested the UFRH and foreign market efficiency and concluded that the hypothesis does not hold. This phenomenon is known as the UFRH puzzle. A...

    Provided By University of Johannesburg

  • White Papers // Jul 2010

    A Method of Electronic Beam Steering for Circular Switched Parasitic Dipole Arrays

    This paper presents a method of electronic beam steering for a smart antenna system based on a switched parasitic array. The antenna system is made up of circular array of half wave dipoles, with four parasitic elements positioned equidistantly, surrounding one active central element. All parasitic elements are assumed to...

    Provided By University of Johannesburg

  • White Papers // Jul 2010

    A Structural Parameter Based Modification of Energy Conscious ESPAR Antenna System through Optimization for WLAN's Dual-Band Operability

    Phased array antenna's radiation pattern can be electronically controlled, which makes them relevant solution for multipath interference. Electronically Steerable Parasitic Array Radiator (ESPAR) antenna systems are part of the family of phased array antenna under the umbrella of aerial beam-forming antennas. Generally ESPAR antenna system design considers the quarter wavelength...

    Provided By University of Johannesburg

  • White Papers // Aug 2009

    Design of Energy Conscious Antenna System for WLAN Frequency Band

    The Electronically Steerable Parasitic Array Radiator (ESPAR) antenna system is configured with one feed radiating element and N-parasitic radiating elements. The radiation pattern is electronically controlled by means of the variable devices loading the parasitic elements. These imply the achievement of low power antenna system with low fabrication cost. The...

    Provided By University of Johannesburg

  • White Papers // Aug 2010

    Intelligent Mobile Sensing and Analysis Research Network in South Africa - Building a Base at the CSIR

    Intelligent capturing and secure communication of physiological and environmental data to central point of presence in large magnitude is crucial in the design of accurate models of natural and man-made systems or processes. The research network aims to utilize ubiquitous mobile phone devices, integrated with built-in or externally connected sensor...

    Provided By University of Johannesburg

  • White Papers // Nov 2011

    Influence of a Realistic Loading on Characteristics and Design of ESPAR

    The paper presents results of a study considering a 2.4 GHz low-cost low-power-consumption Electronically Switched Parasitic Array Radiator (ESPAR) antenna suitable for wireless sensor networks and rural applications. The paper discuses the effects of realistic versus ideal loads in the process of modeling and design on the example of a...

    Provided By University of Johannesburg

  • White Papers // May 2010

    Principles of Increasing the Output Power of a Fiber Laser

    In the paper, the authors present research on how to increase the output power of a fiber laser. A fiber laser is a laser in which the active gain medium or the laser medium is an optical fiber usually doped with rare-earth elements such as erbium, ytterbium, and neodymium. The...

    Provided By University of Johannesburg

  • White Papers // May 2012

    Opportunistic Routing in Multi-Rate Multi-Hop Ad Hoc Networks

    Opportunistic routing has recently been proposed for ad hoc networks. Several works showed that opportunistic routing improves network performance. None of these works, however, studied the integration of opportunistic routing into multi-rate ad hoc networks. In this paper, the authors study this integration. Specifically, they consider the problem of determining...

    Provided By University of Johannesburg

  • White Papers // Feb 2012

    Safety Aspects in the Distance Learning Systems

    In this paper, the authors study the problems of improving the degree of information security in the Distance Learning Systems (DLS) at the expense of using innovative methods and technologies of Information Security Systems (ISS). In this paper, they are also considered the recommendations for improving existing DLS in training...

    Provided By University of Johannesburg

  • White Papers // May 2012

    Testing and Evaluation of a Secure Integrity Measurement System (SIMS) for Remote Systems

    The authors have designed a novel system called a Secure Integrity Measurement System (SIMS) to provide a practical integrity for flexible and traditional remote systems. SIMS is not only targeted for Linux, but it can also be used for different operating systems such as Windows, and UNIX. All and executable...

    Provided By University of Johannesburg

  • White Papers // Jul 2013

    Data Warehouse Success and Strategic Oriented Business Intelligence: A Theoretical Framework

    With the proliferation of the data warehouses as supportive decision making tools, organizations are increasingly looking forward for a complete data warehouse success model that would manage the enormous amounts of growing data. It is therefore important to measure the success of these massive projects. While general is success models...

    Provided By University of Johannesburg

  • White Papers // Sep 2013

    Cloud Computing Challenges with Emphasis on Amazon EC2 and Windows Azure

    Cloud Computing has received much attention by the IT-Business world. As compared to the common computing platforms, cloud computing is more flexible in supporting real-time computation and is considered a more powerful model for hosting and delivering services over the Internet. However, since cloud computing is still at its infancy,...

    Provided By University of Johannesburg