Browsing Faculty of Natural and Agricultural Sciences by Subject "Niobium"

Now showing items 1-6 of 6

    • Classifying bent radio galaxies from a mixture of point-like/extended images with machine learning 

      Bastien, David; Oozeer, Nadeem; Somanah, Radhakrishna (IEEE, 2016)
      The hypothesis that bent radio sources are supposed to be found in rich, massive galaxy clusters and the avalibility of huge amount of data from radio surveys have fueled our motivation to use Machine Learning (ML) to ...

    • Comparison of extractants for the separation of TaF5 and NbF5 in different acidic media 

      Ungerer, M.J.; Van der Westhuizen, D.J.; Lachmann, G.; Krieg, H.M. (Elsevier, 2014)
      To optimise the solvent extraction (SX) of Ta and Nb, eight different extractants were investigated, including the cation exchangers di-iso-octyl-phosphinic acid (PA) and di-(2-ethylhexyl)-phosphoric acid (D2EHPA), the ...

    • Molecular modelling of tantalum in an aqueous phase 

      Ungerer, M.J.; Van Sittert, C.G.C.E.; Van der Westhuizen, D.J.; Krieg, H.M. (SAIMM, 2017)
      The transition metals tantalum (Ta) and niobium (Nb) are of significant importance, for example in the nuclear energy sector where they are used as cladding materials, as well as in capacitors and specialized materials. For ...

    • Molecular modelling of the hydrolysis of tantalum and niobium pentafluoride 

      Ungerer, Marietjie J.; Van der Westhuizen, Derik J.; Krieg, Henning M.; Van Sittert, Cornelia G.C.E. (Trans Tech Publications, 2014)
      Tantalum (Ta) and niobium (Nb) are two metals with similar chemical and physical properties and are found together in nature. One form of Ta is tantalum pentafluoride, which is stable in reducing environments, is corrosive ...

    • Radio frequency interference detection using machine learning 

      Mosiane, Olorato; Oozeer, Nadeem; Bassett, Bruce A. (IEEE, 2016)
      Radio frequency interference (RFI) has plagued radio astronomy which potentially might be as bad or worse by the time the Square Kilometre Array (SKA) comes up. RFI can be either internal (generated by instruments) or ...

    • The time dependent solvent extraction of Ta and Nb 

      Van der Westhuizen, Derik J.; De Beer, Leon; Ungerer, Marietjie J.; Krieg, Henning M. (Trans Tech Publications, 2014)
      The suitability of Liquid-liquid extraction (LLE) for the selective extraction of chemically similar tantalum (Ta) and niobium (Nb) mixtures was investigated by determining the influence of the acid concentration, extractant ...