Now showing items 380-399 of 616

    • Modified earliest decoding for random network codes 

      Von Solms, Suné; Helberg, Albert S.J. (IEEE, 2011)
      We present a practical, modified version of earliest decoding for random linear network coding networks. This decoding method has a lower complexity and decoding delay than traditional Gaussian elimination decoding schemes
    • Monitoring gearbox oil viscosity by means of motor current signal analysis 

      Van Vuuren, Pieter A.; Xu, Yuandong; Gu, Fengshou; Ball, Andrew D. (Univ of Huddersfield, 2017)
      A number of gearbox failures can be attributed to lubricant related problems. One measure of the condition of gearbox oil is its viscosity. In electrically powered systems, motor current signal analysis allows online ...
    • Monitoring of the FSRQ PKS 1510-089 with H.E.S.S. 

      Zacharias, Michael; Jankowsky, Felix; Mohamed, Mahmoud; Prokoph, Heike; Sanchez, David (PoS, 2017)
      The flat spectrum radio quasar (FSRQ) PKS 1510-089 (z=0.361) is known for its complex multiwavelength behavior. It has been monitored regularly at very high energy (VHE, E > 100GeV) gamma-rays with H.E.S.S. since its ...
    • Monomers, polymers and cross-linked membranes for membrane fuel cells and electrolysis 

      Kerres, Jochen A.; Krüger, Andries; Schoeman, Hannes; Bessarabov, Dmitri; Krieg, Henning (Electrochemical Society, 2011)
      This contribution comprises an overview about work in the development of ionomers/ionomer (blend) membranes for fuel cells. The topics include the development of novel sulfonated monomers and homo- and copolymers; the ...
    • Moving households to cleaner energy through air quality offsets 

      Langerman, Kristy E.; Piketh, Stuart J.; Pauw, Christiaan J.; Smith, Hendrik J. (IEEE, 2018)
      Highest levels of exposure to polluted air in South Africa occur in low-income settlements where households burn solid fuels. The Department of Environmental Affairs has recently developed a legally enforceable mechanism ...
    • MSP binaries as astrophysical laboratories 

      Wadiasingh, Zorawar; Venter, Christo; Böttcher, Markus; Harding, Alice K.; Baring, Matthew G. (Cambridge Univ Press, 2018)
      Follow-up of unidentified Fermi sources has expanded the number of known galactic-field “black widow” and “redback” millisecond pulsar binaries from four to nearly 30. Several systems observed by Chandra, XMM-Newton, Suzaku, ...
    • Multi-wavelength observations of flaring blazars with ATOM and Fermi-LAT 

      Jankowsky, Felix; Böttcher, Markus; Zacharias, Michael; Wagner, Stefan J.; Kurtanidze, Omar (Sissa Medialab, 2017)
      The Automatic Telescope for Optical Monitoring is a 75cm optical telescope located at the H.E.S.S. site in Namibia. Since 2005, it monitors around 250 gamma-ray emitting AGN and has observed numerous blazar flares in several ...
    • Multiwavelength analysis of four millisecond pulsars 

      Guillemot, L.; Venter, C.; Cognard, I.; Johnson, T.J.; Harding, A.K.; Fermi LAT (AIPC, 2011)
      Radio timing observations of millisecond pulsars (MSPs) in support of Fermi LAT observations of the gamma-ray sky enhance the sensitivity of high-energy pulsation searches. With contemporaneous ephemerides we have detected ...
    • Multiwavelength modeling of the globular cluster Terzan 5 

      Büsching, I.; Venter, C.; Kopp, A.; De Jager, O.C.; Clapson, A.C. (ICRC, 2011)
      Diffuse X-ray emission has recently been detected from the globular cluster (GC) Terzan 5, extending out to ~2.5' from the cluster centre. This emission may arise from synchrotron radiation (SR) by energetic leptons being ...
    • Multiwavelength polarization as a diagnostic of blazar physics 

      Böttcher, Markus; Zhang, Haocheng; Chen, Xuhui (Sissa Medialab, 2015)
      The nature of the high-energy emission in jet-dominated AGN (especially blazars) as well as the location and mode of acceleration of particles to ultra- relativistic energies are a matter of intensive debate. Both leptonic ...
    • Multiwavelength signatures of shocks in relativistic jets 

      Böttcher, Markus; Baring, Matthew G.; Summerlin, Errol J. (HEASA, 2016)
      Mildly relativistic, oblique shocks are frequently invoked as possible sites of relativistic particle acceleration and production of strongly variable, polarized multi-wavelength emission from relativistic jet sources ...
    • N-acetyl cysteine as therapeutic intervention in a “two-hit” model of maternal inflammation and post-natal methamphetamine exposure 

      Möller, M.; Swanepoel, T.; Harvey, B.; Dean, O.; Berk, M. (Elsevier, 2016)
      Schizophrenia is a severe neurodegenerative, pro- gressive degenerative illness, prevalent in 0.5−1% of the world population. It is causally associated with a genetic aspect as well as early-life environmental stress. ...
    • Network resonance detection using harmonic active power 

      Bottenberg, Agknaton; Peterson, Brandon; Rens, Johan; Debruyne, Colin; Knockaert, Jos (IEEE, 2018)
      Resonances in electrical distribution systems can result in amplification of harmonics, which is undesirable in electrical networks. To avoid intrusive measurement techniques, in the majority of the cases network modeling ...
    • Neural models for benchmarking of truck driver fuel economy performance 

      Hoffman, Alwyn J. (INSTICC, 2019)
      The transport industry is a primary contributor towards emissions that impact climate change. Fuel economy is also of critical importance to the profitability of road freight transport operators. Empirical evidence identified ...
    • New advances in pulsar magnetosphere modelling 

      Venter, Christo (Sissa Medialab, 2016)
      The wealth of high-energy (E &50MeV) and very-high-energy (E >100 GeV) data accumulated over the past few years have provided unprecedented opportunities to probe pulsar emission models. The Fermi Large Area Telescope ...
    • New method for determination of diffusion coefficients in turbulent plasmas 

      Ivaschenko, Alex; Spanier, Felix; Ganse, Urs (Sissa Medialab, 2015)
      The transport of charged particles in turbulent magnetic fields is a topic of great interest in as- trophysics, since our ability to successfully use cosmic rays as astronomic messengers depends on our understanding of ...
    • Noise matching in coupled antennas 

      Krüger, Paulus; Visser, Barend (IEEE, 2018)
      A novel way to calculate the sensitivity and beam- former coefficients of a receiver consisting of coupled antennas and an optimum beamformer is presented. The low-noise ampli- fier (LNA) connected ...
    • A non-linear simulation model of an active magnetic bearings supported rotor system 

      Myburgh, S.; Van Schoor, G.; Ranft, E.O. (IEEE, 2010)
      Nowadays active magnetic bearings (AMBs) are utilized in a wide range of applications including high-speed flywheel energy storage devices. This paper aims at reporting on the modeling and simulation of a flywheel energy ...
    • NT-proBNP and metabolic risk factors in two ethnic groups: the SABPA cohort study 

      Jujic, A. Amra; Malan, L.; Melander, O.; Nilsson, P.M.; Fedorowski, A. (Oxford Univ Press, 2018)
      Background: Natriuretic peptides are vasoactive peptides with several metabolic actions. Purpose: We aimed to explore associations of N-terminal pro-brain natriuretic peptide (NT-proBNP) with metabolic traits in a mixed ...