https://vital.seals.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 Classical and quantum picture of the interior of two-dimensional black holes https://vital.seals.ac.za/vital/access/manager/Repository/vital:20531 Wed 12 May 2021 23:48:00 SAST ]]> Some ionospheric effects observed at sunrise https://vital.seals.ac.za/vital/access/manager/Repository/vital:5513 Wed 12 May 2021 23:37:53 SAST ]]> The development and evaluation of a Nd:YAG laser incorporating an unstable resonator https://vital.seals.ac.za/vital/access/manager/Repository/vital:5512 Wed 12 May 2021 23:35:05 SAST ]]> Finite precision arithmetic in Polyphase Filterbank implementations https://vital.seals.ac.za/vital/access/manager/Repository/vital:38503 Wed 12 May 2021 23:20:29 SAST ]]> Towards modelling the formation of ore bodies initial results dealing with the fluid mechanical aspects of magma chamber convection https://vital.seals.ac.za/vital/access/manager/Repository/vital:5492 Wed 12 May 2021 23:08:31 SAST ]]> An investigation into improved ionospheric F1 layer predictions over Grahamstown, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5511 Wed 12 May 2021 22:45:13 SAST ]]> Thermoluminescence of secondary glow peaks in carbon-doped aluminium oxide https://vital.seals.ac.za/vital/access/manager/Repository/vital:5537 Wed 12 May 2021 22:37:25 SAST ]]> Comparison of A₄ neutrino mass models https://vital.seals.ac.za/vital/access/manager/Repository/vital:5554 Wed 12 May 2021 22:30:24 SAST ]]> Observations of diffuse radio emission in the Perseus Galaxy Cluster https://vital.seals.ac.za/vital/access/manager/Repository/vital:38233 Wed 12 May 2021 19:59:26 SAST ]]> First H F Doppler soundings of the ionosphere at SANAE https://vital.seals.ac.za/vital/access/manager/Repository/vital:5500 Wed 12 May 2021 19:56:40 SAST ]]> Thermoluminescence of annealed synthetic quartz https://vital.seals.ac.za/vital/access/manager/Repository/vital:19957 Wed 12 May 2021 19:55:06 SAST ]]> Expanding the capabilities of the DPS lonosonde system https://vital.seals.ac.za/vital/access/manager/Repository/vital:5560 Wed 12 May 2021 19:50:08 SAST ]]> Assignment of spin and parity to states in the nucleus ¹⁹⁶T1 https://vital.seals.ac.za/vital/access/manager/Repository/vital:5558 Wed 12 May 2021 19:49:57 SAST ]]> Computer control of a barry research chirpsounder https://vital.seals.ac.za/vital/access/manager/Repository/vital:5507 Wed 12 May 2021 19:36:46 SAST ]]> Some properties of magnetospheric electrons observed west of Sanae https://vital.seals.ac.za/vital/access/manager/Repository/vital:5523 Wed 12 May 2021 19:23:20 SAST ]]> Developing an ionospheric map for South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5459 Wed 12 May 2021 19:06:06 SAST ]]> The selection and evaluation of grey-level thresholds applied to digital images https://vital.seals.ac.za/vital/access/manager/Repository/vital:5443 Wed 12 May 2021 18:55:44 SAST ]]> Thermoluminescence of synthetic quartz annealed beyond its second phase inversion temperature https://vital.seals.ac.za/vital/access/manager/Repository/vital:25577 Wed 12 May 2021 18:51:02 SAST ]]> A feasibility study into the possibility of ionospheric propagation of low VHF (30-35 MHZ) signals between South Africa and Central Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5465 Wed 12 May 2021 18:48:02 SAST ]]> Observation and processing of 2.3 GHz radio astronomy survey data https://vital.seals.ac.za/vital/access/manager/Repository/vital:5505 Wed 12 May 2021 18:42:52 SAST ]]> A study of why some physic concepts in the South African Physical Science curriculum are poorly understood in order to develop a targeted action-research intervention for Newton’s second law https://vital.seals.ac.za/vital/access/manager/Repository/vital:38575 Wed 12 May 2021 18:39:05 SAST ]]> Thermoluminescence characteristics of synthetic quartz https://vital.seals.ac.za/vital/access/manager/Repository/vital:5538 Wed 12 May 2021 18:18:39 SAST ]]> Finite element simulations of shear aggregation as a mechanism to form platinum group elements (PGEs) in dyke-like ore bodies https://vital.seals.ac.za/vital/access/manager/Repository/vital:5561 Wed 12 May 2021 18:11:32 SAST ]]> Statistical study of traveling ionospheric disturbances over South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:30556 Wed 12 May 2021 17:50:57 SAST ]]> A study of the fluorescence excitation spectrum of crystalline anthracene https://vital.seals.ac.za/vital/access/manager/Repository/vital:5518 Wed 12 May 2021 17:49:58 SAST ]]> The variability and predictability of the IRI shape parameters over Grahamstown, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5496 Wed 12 May 2021 17:49:23 SAST ]]> Statistical analysis of the ionospheric response during storm conditions over South Africa using ionosonde and GPS data https://vital.seals.ac.za/vital/access/manager/Repository/vital:5555 Wed 12 May 2021 17:41:38 SAST ]]> Ionospheric total electron content variability and its influence in radio astronomy https://vital.seals.ac.za/vital/access/manager/Repository/vital:5473 Wed 12 May 2021 17:41:31 SAST ]]> An investigation of the structure of the Southern Hemisphere radio-meteor streams https://vital.seals.ac.za/vital/access/manager/Repository/vital:5448 Wed 12 May 2021 17:40:55 SAST ]]> Ionospheric disturbances during magnetic storms at SANAE https://vital.seals.ac.za/vital/access/manager/Repository/vital:26639 Wed 12 May 2021 17:31:19 SAST ]]> Temperature dependence of the HartRAO pointing model https://vital.seals.ac.za/vital/access/manager/Repository/vital:5491 Wed 12 May 2021 17:23:16 SAST ]]> A real time Fast Fourier Transform analyser https://vital.seals.ac.za/vital/access/manager/Repository/vital:5439 Wed 12 May 2021 17:22:56 SAST ]]> Verification of Ionospheric tomography using MIDAS over Grahamstown, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5497 Wed 12 May 2021 17:18:51 SAST ]]> Particle precipitation effects on the South African ionosphere https://vital.seals.ac.za/vital/access/manager/Repository/vital:5481 Wed 12 May 2021 16:53:40 SAST ]]> Calibration and wide field imaging with PAPER: a catalogue of compact sources https://vital.seals.ac.za/vital/access/manager/Repository/vital:20285 Wed 12 May 2021 16:46:56 SAST ]]> Updating the ionospheric propagation factor, M(3000)F2, global model using the neural network technique and relevant geophysical input parameters https://vital.seals.ac.za/vital/access/manager/Repository/vital:5434 Wed 12 May 2021 16:43:54 SAST ]]> Mechanisms of luminescence in α-Al₂O₃:C : investigations using time-resolved optical stimulation and thermoluminescence techniques https://vital.seals.ac.za/vital/access/manager/Repository/vital:5447 Wed 12 May 2021 16:26:41 SAST ]]> A real time HF beacon monitoring station for South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5486 Wed 12 May 2021 16:17:43 SAST ]]> A feasibility study into total electron content prediction using neural networks https://vital.seals.ac.za/vital/access/manager/Repository/vital:5466 Wed 12 May 2021 16:16:20 SAST ]]> PyMORESANE: A Pythonic and CUDA-accelerated implementation of the MORESANE deconvolution algorithm https://vital.seals.ac.za/vital/access/manager/Repository/vital:5563 Wed 12 May 2021 16:14:42 SAST ]]> The dispersion measure in broadband data from radio pulsars https://vital.seals.ac.za/vital/access/manager/Repository/vital:29157 Wed 12 May 2021 16:10:48 SAST ]]> Automation of source-artefact classification https://vital.seals.ac.za/vital/access/manager/Repository/vital:20743 Wed 12 May 2021 16:10:45 SAST ]]> Using co-located radars and instruments to analyse ionespheric events over South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5493 Wed 12 May 2021 15:59:02 SAST ]]> A study of atmospheric oscillations in the meteor region above Grahamstown https://vital.seals.ac.za/vital/access/manager/Repository/vital:5490 :30'E) meteor radar between the years 1987 and 1993 inclusive. Harmonic analysis and the maximum entropy method (MEM) , were used for the spectral characterization ofthe wind above Grahamstown. The prevailing wind, tidal (periods 12- and 24- h) and other (periods 8- and 6-h) oscillations were extracted from the data using the guidelines agreed upon by the A TMAP community. Above Grahamstown the zonal and meridional prevailing winds were found to be predominantly eastward and equatorward respectively. Tidal amplitudes are comparable to the magnitude of the prevailing wind vector, with the diurnal tide being stronger than the semidiurnal tide. The phase differences between ,the zonal and meridional components of the semidiurnal and diurnal tides are - 2 hand - 5 h respectively, which is in reasonable agreement with the corresponding expected values of3 hand 6 h. The tidal wind vectors are on average elliptically polarized with anticlockwise rotation. Longitudinal and day-to-day tidal variations were studied. From the longitudinal study, the semidiurnal tide was found to be dominated by migrating modes, while the diurnal tidal behaviour suggests the presence of nonmigrating modes with zonal wavenumber s = 4. Tides were found to be variable from day to day with little apparent correlation between the zonal and meridional components of the respective tides.]]> Wed 12 May 2021 15:49:24 SAST ]]> The utilization of tilting-filter photometry in airglow and auroral research https://vital.seals.ac.za/vital/access/manager/Repository/vital:5494 Wed 12 May 2021 15:48:31 SAST ]]> Parametrised gains for direction-dependent calibration https://vital.seals.ac.za/vital/access/manager/Repository/vital:42196 Wed 12 May 2021 14:25:43 SAST ]]> Observations of cosmic re-ionisation with the Hydrogen Epoch of Reionization Array: simulations of closure phase spectra https://vital.seals.ac.za/vital/access/manager/Repository/vital:42480 0:5 h Mpc-1. We also found that the foreground leakage is worse when edge antennas are included, as they have a more different primary beam compared to antennas at the centre of the array. The leakage magnitude is worse when bright foregrounds appear in the antenna sidelobes, as expected. Our simulations provide a useful framework to interpret observations and assess which power spectrum region is expected to be most contaminated by foreground power leakage.]]> Wed 12 May 2021 14:24:29 SAST ]]> Predictability of Geomagnetically Induced Currents using neural networks https://vital.seals.ac.za/vital/access/manager/Repository/vital:5483 Tue 27 Aug 2024 11:37:20 SAST ]]> The EPR paradox: back from the future https://vital.seals.ac.za/vital/access/manager/Repository/vital:20338 Thu 23 Jun 2022 11:24:04 SAST ]]> The implementation of a core architecture for geophysical data acquisition https://vital.seals.ac.za/vital/access/manager/Repository/vital:5471 Thu 13 May 2021 13:16:36 SAST ]]> Development of a neural network based model for predicting the occurrence of spread F within the Brazilian sector https://vital.seals.ac.za/vital/access/manager/Repository/vital:5460 Thu 13 May 2021 09:13:17 SAST ]]> Structure of the nucleus ¹¹⁴Sn using gamma-ray coincidence data https://vital.seals.ac.za/vital/access/manager/Repository/vital:5562 Thu 13 May 2021 08:52:22 SAST ]]> A VLBI polarisation study of 43 GHZ SiO masers towards VY CMA https://vital.seals.ac.za/vital/access/manager/Repository/vital:5498 Thu 13 May 2021 08:22:08 SAST ]]> Investigation into the extended capabilities of the new DPS-4D ionosonde https://vital.seals.ac.za/vital/access/manager/Repository/vital:5472 Thu 13 May 2021 08:08:05 SAST ]]> A new empirical model for the peak ionospheric electron density using neural networks https://vital.seals.ac.za/vital/access/manager/Repository/vital:5478 Thu 13 May 2021 07:39:27 SAST ]]> Measuring the RFI environment of the South African SKA site https://vital.seals.ac.za/vital/access/manager/Repository/vital:5474 Thu 13 May 2021 07:16:45 SAST ]]> Designing and implementing a new pulsar timer for the Hartebeesthoek Radio Astronomy Observatory https://vital.seals.ac.za/vital/access/manager/Repository/vital:5458 Thu 13 May 2021 07:10:11 SAST ]]> Calibration and interpretation of A 2.3 GHz continuum survey https://vital.seals.ac.za/vital/access/manager/Repository/vital:5502 L > -58° is studied. It is dominated by a plateau of emission for L < -26°. This is interpreted as a combination of thermal and nonthermal radiation emitted by a ring of gas symmetric about the galactic centre with a radius of 4 - 6 kpc.]]> Thu 13 May 2021 06:53:12 SAST ]]> The effect of different parameters on the rupture properties of leather in a tensile test https://vital.seals.ac.za/vital/access/manager/Repository/vital:5462 Thu 13 May 2021 06:48:58 SAST ]]> Studies in ionospheric ray tracing https://vital.seals.ac.za/vital/access/manager/Repository/vital:5501 Thu 13 May 2021 06:28:30 SAST ]]> A VLBI study of OH masers in a proto-planetary nebula OH 0.9+1.3 https://vital.seals.ac.za/vital/access/manager/Repository/vital:5499 Thu 13 May 2021 06:26:01 SAST ]]> Multi-instrument observations of ionospheric irregularities over South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5476 Thu 13 May 2021 06:18:50 SAST ]]> Real-time audio spectrum analyser research, design, development and implementation using the 32 bit ARMR Cortex-M4 microcontroller https://vital.seals.ac.za/vital/access/manager/Repository/vital:25997 Thu 13 May 2021 06:12:17 SAST ]]> TiRiFiG, a graphical 3D kinematic modelling tool https://vital.seals.ac.za/vital/access/manager/Repository/vital:30558 Thu 13 May 2021 06:10:31 SAST ]]> Link between ghost artefacts, source suppression and incomplete calibration sky models https://vital.seals.ac.za/vital/access/manager/Repository/vital:5556 Thu 13 May 2021 06:07:57 SAST ]]> A Bayesian approach to tilted-ring modelling of galaxies https://vital.seals.ac.za/vital/access/manager/Repository/vital:38466 Thu 13 May 2021 05:58:42 SAST ]]> Progress towards the development and implementation of an unambiguous copper wire fingerprinting system https://vital.seals.ac.za/vital/access/manager/Repository/vital:5484 Thu 13 May 2021 05:52:34 SAST ]]> Observations of diffuse radio emission in the Abell 773 galaxy cluster https://vital.seals.ac.za/vital/access/manager/Repository/vital:38394 Thu 13 May 2021 05:41:52 SAST ]]> MEQSILHOUETTE: a mm-VLBI observation and signal corruption simulator https://vital.seals.ac.za/vital/access/manager/Repository/vital:25019 Thu 13 May 2021 05:32:08 SAST ]]> Thermoluminescence of natural quartz https://vital.seals.ac.za/vital/access/manager/Repository/vital:5543 Thu 13 May 2021 05:21:09 SAST ]]> Optimizing MIDAS III over South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5517 Thu 13 May 2021 05:10:35 SAST ]]> A pilot wide-field VLBI survey of the GOODS-North field https://vital.seals.ac.za/vital/access/manager/Repository/vital:30027 5x105 K and >6x1021 W Hz-1 respectively. This work demonstrates that automated post-processing pipelines for wide-field, uniform sensitivity VLBI surveys are feasible and indeed made more efficient with new software, wide-field imaging algorithms and more purpose-built source- finders. This broadens the discovery space for future wide-field surveys with upcoming arrays such as the African VLBI Network (AVN), MeerKAT and the Square Kilometre Array (SKA).]]> Thu 13 May 2021 05:08:27 SAST ]]> Properties of traveling ionospheric disturbances (TIDs) over the Western Cape, South Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5557 Thu 13 May 2021 04:57:39 SAST ]]> Machine learning methods for calibrating radio interferometric data https://vital.seals.ac.za/vital/access/manager/Repository/vital:31398 Thu 13 May 2021 04:55:12 SAST ]]> The establishment of a Lidar facility at Rhodes University https://vital.seals.ac.za/vital/access/manager/Repository/vital:5445 Thu 13 May 2021 04:52:35 SAST ]]> Calibration and imaging with variable radio sources https://vital.seals.ac.za/vital/access/manager/Repository/vital:24721 Thu 13 May 2021 04:51:42 SAST ]]> The search for an ionospheric model suitable for real-time applications in HF radio communications https://vital.seals.ac.za/vital/access/manager/Repository/vital:5488 Thu 13 May 2021 04:41:21 SAST ]]> A 150 MHz all sky survey with the Precision Array to Probe the Epoch of Reionization https://vital.seals.ac.za/vital/access/manager/Repository/vital:34556 Thu 13 May 2021 04:40:36 SAST ]]> Finite element modelling of magma convection and attendant groundwater flow https://vital.seals.ac.za/vital/access/manager/Repository/vital:5467 Thu 13 May 2021 04:24:15 SAST ]]> The development of an improved coded-pulse, vertical-incidence ionosonde https://vital.seals.ac.za/vital/access/manager/Repository/vital:5436 Thu 13 May 2021 03:43:09 SAST ]]> Distributed control applications using local area networks: a LAN based power control system at Rhodes University https://vital.seals.ac.za/vital/access/manager/Repository/vital:5461 Thu 13 May 2021 03:37:19 SAST ]]> Foreground simulations for observations of the global 21-cm signal https://vital.seals.ac.za/vital/access/manager/Repository/vital:30557 Thu 13 May 2021 01:46:55 SAST ]]> Beta decay of 100/400 Zr produced in neutron-induced fission of natural uranium https://vital.seals.ac.za/vital/access/manager/Repository/vital:20353 Thu 13 May 2021 01:43:27 SAST ]]> A light-emitting-diode pulsing system for measurement of time-resolved luminescence https://vital.seals.ac.za/vital/access/manager/Repository/vital:20976 Thu 13 May 2021 01:37:18 SAST ]]> Geomagnetically induced current characteristics in southern Africa https://vital.seals.ac.za/vital/access/manager/Repository/vital:5469 Thu 13 May 2021 01:31:54 SAST ]]> Computer control of an HF chirp radar https://vital.seals.ac.za/vital/access/manager/Repository/vital:5455 Thu 13 May 2021 00:45:07 SAST ]]> Forecasting solar cycle 24 using neural networks https://vital.seals.ac.za/vital/access/manager/Repository/vital:5468 Thu 13 May 2021 00:24:49 SAST ]]> Variability analysis of a sample of potential southern calibration sources https://vital.seals.ac.za/vital/access/manager/Repository/vital:5495 Thu 13 May 2021 00:13:28 SAST ]]> Single station TEC modelling during storm conditions https://vital.seals.ac.za/vital/access/manager/Repository/vital:20545 Thu 13 May 2021 00:00:25 SAST ]]> Accelerated implementations of the RIME for DDE calibration and source modelling https://vital.seals.ac.za/vital/access/manager/Repository/vital:42199 Thu 13 Jul 2023 12:40:08 SAST ]]> Night-time gravity waves detected with multi-frequency airglow imager https://vital.seals.ac.za/vital/access/manager/Repository/vital:42931 Mon 17 May 2021 13:00:31 SAST ]]>