African University of Science and Technology: Recent submissions

Now showing items 1221-1240 of 4828

  • Ubiquitous intelligence for smart cities: a public safety approach 

    Isafiade, Omowunmi Elizabeth (University of Cape TownFaculty of ScienceDepartment of Computer Science, 2017)
    Citizen-centered safety enhancement is an integral component of public safety and a top priority for decision makers in a smart city development. However, public safety agencies are constantly faced with the challenge of ...

  • Irreversible mixing by unstable periodic orbits in buoyancy dominated stratified turbulence 

    Lucas, D; Caulfield, Colm-cille Patrick (Cambridge University PressJournal of Fluid Mechanics, 2017-10-26)
    We consider turbulence driven by a large-scale horizontal shear in Kolmogorov flow (i.e. with sinusoidal body forcing) and a background linear stable strati cation with buoyancy frequency $N^2_B$ imposed in the third, ...

  • The geodesic X-ray transform with a $GL(n,\mathbb{C})$-connection 

    Monard, François; Paternain, Gabriel Pedro
    We derive reconstruction formulas for a family of geodesic ray transforms with connection, defined on simple Riemannian surfaces. Such formulas provide injectivity of such all transforms in a neighbourhood of constant ...

  • Inequalities for the Gaussian measure of convex sets 

    Tehranchi, MR
    This note presents families of inequalities for the Gaussian measure of convex sets which extend the recently proven Gaussian correlation inequality in various directions.

  • Active particles in periodic lattices 

    Chamolly, Alexander; Ishikawa, T; Lauga, Eric Jean-Marie (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 ...

  • Augmenting security event information with contextual data to improve the detection capabilities of a SIEM 

    Bissict, Jason (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 ...

  • On Big Data Management in Internet of Things 

    Ojewale, Mubarak Adetunji (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 ...

  • Quality of service and NFC Communications Security of applications dedicated to dependent people 

    Afolabi-Bello, Oluwayemisi (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 ...

  • An adaptive predictive financial fraud detection approach using deep learning methods on a Big Data platform 

    Isa, Ismail Modibbo (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 ...

  • A mobile based image analysis system for Cervical Cancer Detection 

    Saka, Abiola Monsour (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 ...

  • A Hybridized Recommendation System on Movie Data Using Content-Based and Collaborative Filtering 

    Otegbade, Omowunmi (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 ...

  • A Data Driven Anomaly based behavior detection method for Advanced Persistent Threats (APT) 

    Ezefosie, Nkirue (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 ...

  • Implementation of New Fault Tolerance Solution in Wireless Sensor Networks in a Multi-Channel Context 

    Ohida, Sefiya (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 ...

  • Wireless Sensor Networks for Environmental Monitoring Applications 

    Odo, Christian Maduabuchi (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 ...

  • A Variational Model for Joint Motion Estimation and Image Reconstruction 

    Burger, Martin; Dirks, Hendrik; Schönlieb, Carola-Bibiane (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 ...

  • Layer formation in horizontally forced stratified turbulence: Connecting exact coherent structures to linear instabilities 

    Lucas, D; Caulfield, Colm-cille Patrick; Kerswell, Richard Rodney (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 ...

  • The shape of bouncing universes 

    Barrow, John David; Ganguly, C
    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 ...

  • Planck intermediate results: LI. Features in the cosmic microwave background temperature power spectrum and shifts in cosmological parameters 

    Aghanim, N; Akrami, Y; Ashdown, Mark Andrew; Aumont, J; Baccigalupi, C; Ballardini, M; Banday, AJ; Barreiro, RB; Bartolo, N; Basak, S; Benabed, K; Bersanelli, M; Bielewicz, P; Bonaldi, A; Bonavera, L; Bond, JR; Borrill, J; Bouchet, FR; Burigana, C; Calabrese, E; Cardoso, JF; Challinor, Anthony David; Chiang, HC; Colombo, LPL; Combet, C; Crill, BP; Curto, A; Cuttaia, F; De Bernardis, P; De Rosa, A; De Zotti, G; Delabrouille, J; Di Valentino, E; Dickinson, C; Diego, JM; Doré, O; Ducout, A; Dupac, X; Dusini, S; Efstathiou, George Petros; Elsner, F; Enßlin, TA; Eriksen, HK; Fantaye, Y; Finelli, F; Forastieri, F; Frailis, M; Franceschi, E; Frolov, A; Galeotta, S; Galli, S; Ganga, K; Génova-Santos, RT; Gerbino, M; González-Nuevo, J; Górski, KM; Gratton, S; Gruppuso, A; Gudmundsson, JE; Herranz, D; Hivon, E
    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 ...

  • Entropic Comparison of Atomic-Resolution Electron Tomography of Crystals and Amorphous Materials 

    Collins, Sean Michael; Leary, RK; Midgley, Paul Anthony; Tovey, Robert; Benning, Martin; Schoenlieb, Carola-Bibiane; Rez, P; Treacy, MMJ (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. ...

  • Twistor theory at fifty: from contour integrals to twistor strings. 

    Atiyah, Michael; Dunajski, Maciej Lukasz; Mason, Lionel J (Proceedings. Mathematical, physical, and engineering sciences, 2017-10-11)