African University of Science and Technology: Recent submissions
Now showing items 1221-1240 of 4824
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Active particles in periodic lattices
(Institute of Physics (IoP) and Deutsche Physikalische GesellschaftNew Journal of Physics, 2017-11-01)Both natural and artificial small-scale swimmers may often self-propel in environments subject to complex geometrical constraints. While most past theoretical work on low-Reynolds number locomotion addressed idealised ...
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Augmenting security event information with contextual data to improve the detection capabilities of a SIEM
(University of Cape TownFaculty of ScienceDepartment of Computer Science, 2017)The increasing number of cyber security breaches have revealed a need for proper cyber security measures. The emergence of the internet and the increase in overall connectivity means that data is more easily accessible and ...
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On Big Data Management in Internet of Things
(2016-06-16)The Internet of Things (IoT) has generated a large amount of research interest across a wide variety of technical areas. These include the physical devices themselves, communications among them, and relationships between ...
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Quality of service and NFC Communications Security of applications dedicated to dependent people
(2016-05-15)The application of Near Field Communication (NFC) technology in every part of the world today has tremendously improved efficiency and effectiveness regarding security. The use of this technology in the healthcare system ...
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An adaptive predictive financial fraud detection approach using deep learning methods on a Big Data platform
(2016-05-16)Fraud, waste, and abuse in many financial systems are estimated to result in significant losses annually. Predictive analytics offer government and private financial institutions the opportunity to identify, prevent or ...
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A mobile based image analysis system for Cervical Cancer Detection
(2016-05-15)Cervical cancer is the third major killer disease in developed and developing countries. Whereas screening and other preventive measures reduce the mortality rate in developed countries, mortality rates still remain very ...
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A Hybridized Recommendation System on Movie Data Using Content-Based and Collaborative Filtering
(2016-05-15)In recent times, the rate of growth in information available on the internet has resulted in large amounts of data and an increase in online users. The Recommendation System has been employed to empower users to make ...
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A Data Driven Anomaly based behavior detection method for Advanced Persistent Threats (APT)
(2016-06-16)Advanced Persistent Threats (APTs), represent sophisticated and enduring network intrusion campaigns targeting sensitive information from targeted organizations and operating over a long period. These types of threats are ...
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Implementation of New Fault Tolerance Solution in Wireless Sensor Networks in a Multi-Channel Context
(2016-08-16)Wireless sensor network is application specific, which is deployed in an interested area like about hundred or thousands of sensor nodes. All the sensor nodes communicate via a wireless medium and works cooperatively to ...
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Wireless Sensor Networks for Environmental Monitoring Applications
(2016-08-16)After many years of rigorous research and development in wireless sensor network (WSN) technology with numerous responses to innovative applications, WSNs still have some interesting unanswered questions. In this thesis ...
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A Variational Model for Joint Motion Estimation and Image Reconstruction
(Society for Industrial and Applied MathematicsSIAM Journal on Imaging Sciences, 2018-01)The aim of this paper is to derive and analyze a variational model for the joint estimation of motion and reconstruction of image sequences, which is based on a time-continuous Eulerian motion model. The model can be set ...
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Layer formation in horizontally forced stratified turbulence: Connecting exact coherent structures to linear instabilities
(Journal of Fluid Mechanics, 2017-12-10)© 2017 Cambridge University Press. We consider turbulence in a stratified 'Kolmogorov' flow, driven by horizontal shear in the form of sinusoidal body forcing in the presence of an imposed background linear stable ...
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The shape of bouncing universes
What happens to the most general closed oscillating universes in general relativity? We sketch the development of interest in cyclic universes from the early work of Friedmann and Tolman to modern variations introduced by ...
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Planck intermediate results: LI. Features in the cosmic microwave background temperature power spectrum and shifts in cosmological parameters
The six parameters of the standard ΛCDM model have best-fit values derived from the Planck temperature power spectrum that are shifted somewhat from the best-fit values derived from WMAP data. These shifts are driven by ...
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Entropic Comparison of Atomic-Resolution Electron Tomography of Crystals and Amorphous Materials
(American Physical SocietyPhysical Review Letters, 2017-10-20)Electron tomography bears promise for widespread determination of the three-dimensional arrangement of atoms in solids. However, it remains unclear whether methods successful for crystals are optimal for amorphous solids. ...
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Twistor theory at fifty: from contour integrals to twistor strings.
(Proceedings. Mathematical, physical, and engineering sciences, 2017-10-11)
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Critical Evaluation of the Correlations used for Estimating Geomechanical Properties for the Niger Delta
(2016-06-16)The study area which is the Niger Delta Province is predominantly an unconsolidated sandstone terrain, the sand grains are friable suggesting the expectation of some geomechanical problems while developing hydrocarbon ...
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Identification of Closed Perforations and Damaged Sections of Horizontal Wells in Naturally Fractured Reservoirs, using Well Test Analysis
(2016-07-16)The use of horizontal wells with zonal isolations is a common completion practice in the oil and gas industry to check for very significant production challenges such as wellbore damage/skin, early water breakthrough and ...
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Application of Tiab’s Direct Synthesis Technique to Injectivity and fall-off Pressure Transient Test under Non-Isothermal condition
(2016-06-16)In this study, we present a new analytical solution method that accurately corrects the non-isothermal effects from injection and fall-off tests. The derivative of these solutions is applied to develop the Tiab's Direct ...
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An Approach to Waterflood Optimization: Case Study
(2016-06-16)Waterflooding is the most dominant secondary oil recovery method and its popularity is mainly due to the general availability of water, the relative ease of injecting water, the ability of water to spread easily through ...












