Prof Johan Ferreira

Tel: 012 420 2362

Email: [email protected]

Position:  Associate Professor

Junior Focus Area Coordinator: Statistical Theory and Applied Statistics (see link), Centre of Excellence in Mathematical and Statistical Sciences, University of the Witwatersrand, Johannesburg, South Africa

Academic qualifications: MSc, PhD Mathematical Statistics (UP), LRSM (oboe performance)

Research interests:  random matrix theory and inference, multivariate analysis, wireless communications systems, entropy, Bayesian inference

Teaching:

2022: WST 311 (Multivariate Analysis), WST 321 & STK 320 (Time Series Analysis), MVA 720 (Multivariate Analysis)

Before 2022: WST 321 (Time Series Analysis), STK 320 (Statistics), WST 211 & WST 221 (Mathematical statistics), WST 311 (Multivariate Analysis), SFT 720 (Sampling Techniques), MVA 720 (Multivariate Analysis)

Current postgraduate students:

Arno Otto, Paul Louw, Boitumelo Madumo, Jason Pillay, Thembinkosi Manyeruke, Dominic Wrbka, Ané van der Merwe

I supervise a number of students at the honours level for both BSc- and BCom honours degrees in mathematical statistics as well as statistics and data science.

Graduated postgraduate students:

Gopika Ramkilawon, Delene van Wyk, Michaela Laidlaw, Christine van Zyl, Jarod Smith, Tichawona Mutoro, Brett Rowland, Seite Makgai.

Accolades:

Mail and Guardian Top 200 Young South Africans under the age of 35 in the Education category: https://200ysa.mg.co.za/2016/johan-ferriera/

Africa Science Leadership Programme 2018 Fellow: http://www.futureafrica.science/index.php/our-community/research-leaders/johan-ferreira-273

Excellence in Teaching award (2018), Department of Statistics, University of Pretoria

Nominated: Best Lecturer in the Faculty of Natural and Agricultural Sciences at UP: Senior Courses (2019)

ORCID ID: https://orcid.org/0000-0002-5945-6550

Twitter: https://twitter.com/statisafrican

Publons: Link

Recent publications (for full list, check Google Scholar):

  1. Salehi, M., Arashi, M., Bekker, A., Ferreira, J.T., Chen, D.G., Esmaili, F., and Frances, M. 2021. "A synergetic R-Shiny portal for modeling and tracking of COVID-19 data", Frontiers in Public Health, 8:623624.

  2. Marques, F.J., Ghosh, I., Ferreira, J.T., and Bekker, A. 2021. "A note on the product of independent beta random variables", in Contributions of Barry C. Arnold to Statistical Science - Theory and Applications, eds. Ng, H.K.T. et. al, pp. 69-83, Springer: New York.

  3. Botha, T., Ferreira, J.T., and Bekker, A. 2021. "Alternative Dirichlet Priors for Estimating Entropy Via a Power Sum Functional", Mathematics9(13)1493, doi.org/10.3390/math9131493.

  4. Ferreira, J.T. 2021. "Upper bounds for the capacity for severely fading MIMO channels under a scale mixture assumption", Entropy23(7)845, doi.org/10.3390/e23070845.

  5. Ferreira, J.T. 2021. "Reflecting on the viability of Twitter as tool in the postgraduate supervision process", Frontiers in Education, 6:705451.

  6. Ferreira, J.T., Bekker, A., Botha, T., and Makgai, S. 2021. "A note on the probabilistic determinant of independent generalised beta entries". Annual proceedings of the South African Statistical Association Conference, 1, pp. 9-16.

  7. Botha, T., Ferreira, J.T., and Bekker, A. 2022. "Some computational aspects of a noncentral Dirichlet family", in Innovations in multivariate statistical modelling: navigating theoretical and multidisciplinary domains, eds. Bekker, A., et. al. Springer: New York, ISBN 978-3-031-13970-3.

  8. Ferreira, J.T. and van der Merwe, A. 2022. "A noncentral Lindley construction illustrated in an INAR(1) environment", Stats, 5(1), doi.org/10.3390/stats5010005.

  9. Bekker, A., Ferreira, J.T., Human, S.W., and Adamski, K. 2022. "Capturing a change in the covariance structure of a sequential process". Symmetry, 14(1), doi.org/10.3390/sym14010156.

  10. Ferreira, J.T., Botha, T., and Bekker, A. 2022. "Tsallis and other generalised entropy forms subject to Dirichlet mixture priors". Symmetry, 14(6), doi.org/10.3390/sym14061110.

  11. Human, S.W., Bekker, A., Ferreira, J.T., and Mijburgh, P.A. 2022. "A bivariate beta from gamma ratios for determining a potential variance change point: inspired from a process control scenario". Mathematical and Computational Applications, 27(4), doi.org/10.3390/mca27040061.

  12. Botha, T., Ferreira, J.T., and Bekker, A. 2022. "Wasserstein distance as discriminator within the Dirichlet family". Annual proceedings of the South African Statistical Association Conference, accepted.

  13. van der Merwe, A. and Ferreira, J.T. 2022. "An adapted discrete Lindley model emanating from negative binomial mixtures for autoregressive counts". Mathematics, to appear.

  14. Ramkilawon, G.D., Ferreira, J.T., and Nakheirad, N. 2023. "Sine-skewed von Mises- and Lindley/Gumbel models as candidates for direction and distance in modelling animal movement". Brazilian Journal of Biometry, to appear.

Publications emanating from consultation work:

  1. Barret, M., van Niekerk, C., Page-Shipp, R., and Ferreira, J.T. 2020. "Learning music theory en passant: a study in an internationally recognised South African University student choir", British Journal of Music Education39(2), pp. 155-168.

  2. Van Zyl, A., White, Z., Ferreira, J.T., and Wenhold, F. 2019. "Development an impedance based equation for fat free mass of black pre-adolescent South African children", Nutrients, 11(9)2021.

  3. Mirkin, P., Evans, R., and Ferreira, J.T. 2020. "Using poetry to teach chemistry in Grade 9  - shifting paradigms", South African Journal of Education, 40(2).

Edited books:

Computational and Methodological Statistics and Biostatistics: Contemporary Essays in Advancement, 2020, eds. Bekker, A., Chen, D., and Ferreira, J.T. ISBN nr 978-3-030-42195-3, Springer: New York.

Innovations in multivariate statistical modelling: navigating theoretical and multidisciplinary domains, 2022, eds. Bekker, A., Ferreira, J.T., Arashi, M., and Chen, D. ISBN 978-3-031-13970-3. Springer: New York.

Have a look at a seminar from May 2022:

Published by Johan Ferreira

Copyright © University of Pretoria 2022. All rights reserved.

COVID-19 Corona Virus South African Resource Portal

To contact the University during the COVID-19 lockdown, please send an email to [email protected]

Click here for frequently asked questions for first year UP students

FAQ's Email Us Virtual Campus Share Cookie Preferences