African University of Science and Technology: Recent submissions

Now showing items 1301-1320 of 4828

  • Mode Selection in Compressible Active Flow Networks. 

    Forrow, Aden; Woodhouse, Francis Gordon; Dunkel, Jörn (Physical review letters, 2017-07-14)
    Coherent, large-scale dynamics in many nonequilibrium physical, biological, or information transport networks are driven by small-scale local energy input. Here, we introduce and explore an analytically tractable nonlinear ...

  • Markov numbers and Lagrangian cell complexes in the complex projective plane 

    Evans, Jonathan David; Smith, Ivan (Mathematical sciences publishersGEOMETRY & TOPOLOGY, 2018)
    We study Lagrangian embeddings of a class of two-dimensional cell complexes L_p,q into the complex projective plane. These cell complexes, which we call pinwheels, arise naturally in algebraic geometry as vanishing cycles ...

  • Sufficientness postulates for Gibbs-type priors and hierarchical generalizations 

    Bacallado de Lara, Sergio Andres; Battiston, M; Favaro, S; Trippa, L
    A fundamental problem in Bayesian nonparametrics consists of selecting a prior distribution by assuming that the corresponding predictive probabilities obey certain properties. An early discussion of such a problem, although ...

  • Multi-Unit Auction Revenue with Possibilistic Beliefs 

    Unknown author (2017-06-05)
    The revenue of traditional auction mechanisms is benchmarked solely against the players' own valuations, despite the fact that they may also have valuable beliefs about each other's valuations. Not much is known about ...

  • Nonlinear evolution of linear optimal perturbations of strongly stratified shear layers 

    Taylor, John Ryan; Caulfield, Colm-cille Patrick; Kaminski, AK (Cambridge University PressJournal of Fluid Mechanics, 2017-08-25)
    The Miles-Howard theorem states that a necessary condition for normal-mode instability in parallel, inviscid, steady stratified shear flows is that the minimum gradient Richardson number, $Ri_{g,min}$, is less than 1/4 ...

  • Energy dissipation rate limits for flow through rough channels and tidal flow across topography (vol 808, pg 562, 2016) 

    Kerswell, Richard Rodney (JOURNAL OF FLUID MECHANICS, 2018-01-10)
    This is a corrigendum

  • Small-time fluctuations for sub-Riemannian diffusion loops 

    Habermann, Karen
    We study the small-time fluctuations for diffusion processes which are conditioned by their initial and final positions, under the assumptions that the diffusivity has a sub-Riemannian structure and that the drift vector ...

  • Role of overturns in optimal mixing in stratified mixing layers 

    Mashayek, A; Caulfield, Colm-cille Patrick; Peltier, WR (Cambridge University PressJournal of Fluid Mechanics, 2017-09-10)
    Turbulent mixing plays a major role in enabling the large scale ocean circulation. The accuracy of mixing rates estimated from observations depends on our understanding of basic fluid mechanical processes underlying the ...

  • Trend to equilibrium for the Becker–Döring equations: an analogue of Cercignani's conjecture 

    Cañizo, JA; Einav, Amit; Lods, B (Mathematical Sciences PublishersAnalysis and PDE, 2017-08-01)
    We investigate the rate of convergence to equilibrium for subcritical solutions to the Becker–Döring equations with physically relevant coagulation and fragmentation coefficients and mild assumptions on the given initial ...

  • Trust in numbers 

    Spiegelhalter, David John (WileyJournal of the Royal Statistical Society. Series A: Statistics in Society, 2017-10-01)
    Those who value quantitative and scientific evidence are faced with claims both of a reproducibility crisis in scientific publication, and of a post-truth society abounding in fake news and alternative facts. Both issues ...

  • Modeling Crude Oil Production Outlook: A Case Study of the Oil and Gas Industry in Nigeria 

    Apara, Chiamaka (Society of Petroleum Engineers (SPE), 2014-08-05)
    In the past four decades, Nigeria has made impact on the global oil and gas exploration and production industry. As one of the lead exporters of crude oil and natural gas in Africa, an oil production model which tracks oil ...

  • Petroleum Reserves Growth Trend and Pattern: A Case Study of the Niger Delta Basin in Nigeria 

    Apara, Chiamaka (Society of Petroleum Engineers (SPE), 2014-08-05)
    For the purpose of this paper, reserves growth is classified into three main categories: new pool discoveries, reserves revision and reserves extension. For each category, there are distinct factors affecting positive and ...

  • In situ accretion of gaseous envelopes on to planetary cores embedded in evolving protoplanetary discs 

    Coleman, Gavin AL; Papaloizou, John Christopher; Nelson, Richard P (Oxford University PressMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017-09-21)
    The core accretion hypothesis posits that planets with significant gaseous envelopes accreted them from their protoplanetary discs after the formation of rocky/icy cores. Observations indicate that such exoplanets exist ...

  • Autonomous COLREGS Modes and Velocity Functions 

    Unknown author (2017-05-16)
    This paper concerns an implementation of an autonomy system for unmanned surface vessels operating in accordance with the Coast Guard Collision Regulations (COLREGS). The autonomy system is implemented by associating a ...

  • Dynamical tides in exoplanetary systems containing hot Jupiters: Confronting theory and observations 

    Chernov, SV; Ivanov, PB; Papaloizou, John Christopher (Oxford University PressMonthly Notices of the Royal Astronomical Society, 2017-09-11)
    We study the effect of dynamical tides associated with the excitation of gravity waves in an interior radiative region of the central star on orbital evolution in observed systems containing hot Jupiters. We consider ...

  • Phoretic Interactions Generically Induce Dynamic Clusters and Wave Patterns in Active Colloids. 

    Liebchen, Benno; Marenduzzo, Davide; Cates, Michael Elmhirst (Physical review letters, 2017-06-28)
    We introduce a representative minimal model for phoretically interacting active colloids. Combining kinetic theory, linear stability analyses, and a general relation between self-propulsion and phoretic interactions in ...

  • Function of bacteriophage G7C esterase tailspike in host cell adsorption. 

    Prokhorov, Nikolai S; Riccio, Cristian; Zdorovenko, Evelina L; Shneider, Mikhail M; Browning, Christopher; Knirel, Yuriy A; Leiman, Petr G; Letarov, Andrey V (Molecular microbiology, 2017-08)

  • Fundamentals of Laser Dynamics 

    Sanni, Dahiru Muhammad (2013-05-13)
    The thesis presents the modeling and simulation of three types of lasers namely; Semicondoctor laser, Solid state laser and CO 2 laser. The rate equations were derived and simulated to examine the dynamic behaviour of the ...

  • The Design of an On-Chip Silicon Photonic Diode 

    Okikiola, Olaniyan (2013-05-13)
    This work presents numerical calculation of electromagnetic waves in unidirectional on-chip silicon optical diodes. An original optical diode, designed by Wang et. al. [Opt. Express. 19, 26948-26955 (2011)], is based on ...

  • Simulation of Carbon Nanotube Growth 

    Ogunbunmi, Michael Olawale (2013-05-13)
    The basic understanding of the underlying techniques of growing Carbon Nanotubes (CNTs) with a specific chirality is still obscure and needs to be understood so as to properly harness its potentials. Using both Classical ...