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Pacome L. Ambassa is a young researcher heading toward the completion of his PhD degree with the Department of Computer Science at the University of Cape Town, South Africa. He received the BSc and MSc degrees in computer science from the University of Ngaoundere (Cameroon) in 2009 and 2013, respectively. His research interest includes security and privacy for e-healthcare systems, cyber-physical systems, smart grid system and critical infrastructures protection. As part of his PhD research programme, he completed 2 research visits (April -- May 2015) and (March-May 2016), respectively at Norwegian Information Security Laboratory, Norwegian University of Science and Technology, Gjovik, Norway, under the supervision of Prof. Stephen D. Wolthusen. He was recognized as an outstanding young researcher in computer science selected out of a hundred applicants over the world to attend the 4th Heidelberg Laureate Forum in 2016. He has co-authored many scientific publications in peer-reviewed International Journals and Conferences and as book chapter. Pacome has served in the Technical Committee member for IoTsm 2018. He is a reviewer for numerous international conferences and Journals. Aside from his research skills, Pacome is also involved in many leadership activities through community empowerment and awareness.
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I am a doctoral student researcher under the supervision of Prof. Tommie Meyer.
I employ empirical methods, that stem from data science and cognitive science, to evaluate the theory of belief revision with human reasoners.
I have been a part of the Knowledge Representation and Reasoning research group since 2019.
I employ empirical methods, that stem from data science and cognitive science, to evaluate the theory of belief revision with human reasoners.
I have been a part of the Knowledge Representation and Reasoning research group since 2019.
Latest Research Publications:
1.
Baker CK, Meyer T. Belief Change in Human Reasoning: An Empirical Investigation on MTurk. In: Second Southern African Conference for AI Research (SACAIR 2022). Online: SACAIR 2021 Organising Committee; 2022. https://2021.sacair.org.za/proceedings/.
@{427,
author = {Clayton Baker, Tommie Meyer},
title = {Belief Change in Human Reasoning: An Empirical Investigation on MTurk},
abstract = {},
year = {2022},
journal = {Second Southern African Conference for AI Research (SACAIR 2022)},
pages = {218-234},
month = {06/12/2021-10/12/2021},
publisher = {SACAIR 2021 Organising Committee},
address = {Online},
isbn = {978-0-620-94410-6},
url = {https://2021.sacair.org.za/proceedings/},
}
1.
Baker CK, Denny C, Freund P, Meyer T. Cognitive Defeasible Reasoning: the Extent to which Forms of Defeasible Reasoning Correspond with Human Reasoning. In: First Southern African Conference for AI Research (SACAIR 2020). Muldersdrift, South Africa: Springer; 2020. doi:10.1007/978-3-030-66151-9_13.
@{412,
author = {Clayton Baker, Claire Denny, Paul Freund, Tommie Meyer},
title = {Cognitive Defeasible Reasoning: the Extent to which Forms of Defeasible Reasoning Correspond with Human Reasoning},
abstract = {},
year = {2020},
journal = {First Southern African Conference for AI Research (SACAIR 2020)},
pages = {199-219},
month = {22/02/2021-26/02/2021},
publisher = {Springer},
address = {Muldersdrift, South Africa},
isbn = {978-3-030-66151-9},
url = {https://link.springer.com/book/10.1007/978-3-030-66151-9},
doi = {10.1007/978-3-030-66151-9_13},
}
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Prof Etienne Barnard holds a PhD degree in Electrical and Computer Engineering from Carnegie Mellon University, and has been active in research and development in pattern recognition and speech processing for many years. He has held a number of academic and industry positions, holds international patents in speech processing, and is a past Associate Editor of the IEEE Transactions on Neural Networks. Barnard’s research contributions have been recognized in various ways, including Google Research Awards in 2009, 2011 and 2014. He is currently an extraordinary professor at the NWU.
Latest Research Publications:
1.
Davel MH, Theunissen MW, Pretorius AP, Barnard E. DNNs as layers of cooperating classifiers. In: The Thirty-Fourth AAAI Conference on Artificial Intelligence (AAAI-20). New York; 2020.
@{236,
author = {Marelie Davel, Marthinus Theunissen, Arnold Pretorius, Etienne Barnard},
title = {DNNs as layers of cooperating classifiers},
abstract = {},
year = {2020},
journal = {The Thirty-Fourth AAAI Conference on Artificial Intelligence (AAAI-20)},
pages = {3725 - 3732},
month = {07/02-12/02/2020},
address = {New York},
}
1.
Theunissen MW, Davel MH, Barnard E. Insights regarding overfitting on noise in deep learning. In: South African Forum for Artificial Intelligence Research (FAIR). Cape Town, South Africa; 2019.
@{284,
author = {Marthinus Theunissen, Marelie Davel, Etienne Barnard},
title = {Insights regarding overfitting on noise in deep learning},
abstract = {},
year = {2019},
journal = {South African Forum for Artificial Intelligence Research (FAIR)},
pages = {49-63},
address = {Cape Town, South Africa},
}
1.
Pretorius AP, Barnard E, Davel MH. ReLU and sigmoidal activation functions. In: South African Forum for Artificial Intelligence Research (FAIR). Cape Town, South Africa: CEUR Workshop Proceedings; 2019.
@{279,
author = {Arnold Pretorius, Etienne Barnard, Marelie Davel},
title = {ReLU and sigmoidal activation functions},
abstract = {},
year = {2019},
journal = {South African Forum for Artificial Intelligence Research (FAIR)},
pages = {37-48},
month = {04/12-07/12},
publisher = {CEUR Workshop Proceedings},
address = {Cape Town, South Africa},
}
1.
Van der Walt C, Barnard E. Variable Kernel Density Estimation in High-dimensional Feature Spaces. In: AAAI Conf. on Artificial Intelligence (AAAI-17). ; 2017.
@{275,
author = {Christiaan Van der Walt, Etienne Barnard},
title = {Variable Kernel Density Estimation in High-dimensional Feature Spaces},
abstract = {},
year = {2017},
journal = {AAAI Conf. on Artificial Intelligence (AAAI-17)},
pages = {2674-2680},
month = {04/02-09/04},
}
1.
Kleynhans N, Barnard E. Efficient data selection for ASR. Language Resources and Evaluation. 2015;49(2). doi:10.1007/s10579-014-9285-0.
@article{291,
author = {Neil Kleynhans, Etienne Barnard},
title = {Efficient data selection for ASR},
abstract = {},
year = {2015},
journal = {Language Resources and Evaluation},
volume = {49},
pages = {327-353},
issue = {2},
publisher = {Springer Science+Business Media},
address = {Dordrecht},
doi = {10.1007/s10579-014-9285-0},
}
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IBS SCHOLARSHIP STUDENT.
DEGREES LINKED TO THIS RESEARCH GROUP:
1) 2018-current PhD (Philosophy): 'Interfaces between Knowledge Representation and Reasoning and Political Philosophy: The Symbiotic Relationship Between Morality and Justice'.
TALKS:
1) 'Philosophy in/as Translation' (PSSA 2019);
2) 'Decolonizing Knowledge' (PPA 2019);
3) 'AI and the Social Good' (4th CAIR/UP Symposium 2019);
4) 'Decolonization and Alterity: Intersecting Theories and Praxis' (PPA 2018).
DEGREES LINKED TO THIS RESEARCH GROUP:
1) 2018-current PhD (Philosophy): 'Interfaces between Knowledge Representation and Reasoning and Political Philosophy: The Symbiotic Relationship Between Morality and Justice'.
TALKS:
1) 'Philosophy in/as Translation' (PSSA 2019);
2) 'Decolonizing Knowledge' (PPA 2019);
3) 'AI and the Social Good' (4th CAIR/UP Symposium 2019);
4) 'Decolonization and Alterity: Intersecting Theories and Praxis' (PPA 2018).
Latest Research Publications:
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Favour Borokini is a technology policy researcher with a law background from Nigeria. In her role as Data and Digital Rights Researcher with Pollicy, a Ugandan civic technology not-for-profit, she researches a number of knotty topics related to technology-facilitated violence against women and the general impact of subsisting and emerging technologies on social justice and equality.
Latest Research Publications:
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Latest Research Publications:
1.
Britz K, Casini G, Meyer T, Moodley K, Sattler U, Varzinczak I. Principles of KLM-style Defeasible Description Logics. Transactions on Computational Logic. 2020;22 (1). doi:10.1145/3420258.
@article{433,
author = {Katarina Britz, Giovanni Casini, Tommie Meyer, Kody Moodley, Uli Sattler, Ivan Varzinczak},
title = {Principles of KLM-style Defeasible Description Logics},
abstract = {},
year = {2020},
journal = {Transactions on Computational Logic},
volume = {22 (1)},
pages = {1-46},
publisher = {ACM},
url = {https://dl-acm-org.ezproxy.uct.ac.za/doi/abs/10.1145/3420258},
doi = {10.1145/3420258},
}
1.
Britz K, Varzinczak I. Preferential tableaux for contextual defeasible ALC. In: 28th International Conference on Automated Reasoning with Analytic Tableaux and Related Methods (TABLEAUX). Springer LNAI no. 11714; 2019. https://www.springer.com/gp/book/9783030290252.
@{247,
author = {Katarina Britz, Ivan Varzinczak},
title = {Preferential tableaux for contextual defeasible ALC},
abstract = {},
year = {2019},
journal = {28th International Conference on Automated Reasoning with Analytic Tableaux and Related Methods (TABLEAUX)},
pages = {39-57},
month = {03/09-05/09},
publisher = {Springer LNAI no. 11714},
isbn = {ISBN 978-3-030-29026-9},
url = {https://www.springer.com/gp/book/9783030290252},
}
1.
Britz K, Varzinczak I. Contextual rational closure for defeasible ALC. Annals of Mathematics and Artificial Intelligence. 2019;87(1-2). doi:10.1007/s10472-019-09658-2.
@article{246,
author = {Katarina Britz, Ivan Varzinczak},
title = {Contextual rational closure for defeasible ALC},
abstract = {},
year = {2019},
journal = {Annals of Mathematics and Artificial Intelligence},
volume = {87},
pages = {83-108},
issue = {1-2},
isbn = {ISSN: 1012-2443},
url = {https://link.springer.com/article/10.1007/s10472-019-09658-2},
doi = {10.1007/s10472-019-09658-2},
}
1.
Britz K, Casini G, Meyer T, Varzinczak I. A KLM Perspective on Defeasible Reasoning for Description Logics. In: Description Logic, Theory Combination, and All That. Switzerland: Springer; 2019. doi:https://doi.org/10.1007/978-3-030-22102-7 _ 7.
@inbook{240,
author = {Katarina Britz, Giovanni Casini, Tommie Meyer, Ivan Varzinczak},
title = {A KLM Perspective on Defeasible Reasoning for Description Logics},
abstract = {},
year = {2019},
journal = {Description Logic, Theory Combination, and All That},
pages = {147–173},
publisher = {Springer},
address = {Switzerland},
isbn = {978-3-030-22101-0},
url = {https://link.springer.com/book/10.1007%2F978-3-030-22102-7},
doi = {https://doi.org/10.1007/978-3-030-22102-7 _ 7},
}
1.
Du Toit T, Berndt J, Britz K, Fischer B. ConceptCloud 2.0: Visualisation and exploration of geolocation-rich semi-structured data sets. ICFCA 2019 Conference and Workshops. 2019. http://ceur-ws.org/Vol-2378/.
@misc{227,
author = {Tiaan Du Toit, Joshua Berndt, Katarina Britz, Bernd Fischer},
title = {ConceptCloud 2.0: Visualisation and exploration of geolocation-rich semi-structured data sets},
abstract = {},
year = {2019},
journal = {ICFCA 2019 Conference and Workshops},
month = {06/2019},
publisher = {CEUR-WS},
isbn = {1613-0073},
url = {http://ceur-ws.org/Vol-2378/},
}
Research Groups:
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Latest Research Publications:
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Research Groups:
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Latest Research Publications:
1.
Casini G, Meyer T, Varzinczak I. Contextual Conditional Reasoning. In: 35th AAAI Conference on Artificial Intelligence. Online: AAAI Press; 2021.
@{430,
author = {Giovanni Casini, Tommie Meyer, Ivan Varzinczak},
title = {Contextual Conditional Reasoning},
abstract = {},
year = {2021},
journal = {35th AAAI Conference on Artificial Intelligence},
pages = {6254-6261},
month = {02/02/2021-09/02/2021},
publisher = {AAAI Press},
address = {Online},
}
1.
Casini G, Meyer T, Paterson-Jones G. KLM-Style Defeasibility for Restricted First-Order Logic. In: 19th International Workshop on Non-Monotonic Reasoning. Online; 2021. https://drive.google.com/open?id=1WSIl3TOrXBhaWhckWN4NLXoD9AVFKp5R.
@{429,
author = {Giovanni Casini, Tommie Meyer, Guy Paterson-Jones},
title = {KLM-Style Defeasibility for Restricted First-Order Logic},
abstract = {},
year = {2021},
journal = {19th International Workshop on Non-Monotonic Reasoning},
pages = {184-193},
month = {03/11/2021-05/11/2021},
address = {Online},
url = {https://drive.google.com/open?id=1WSIl3TOrXBhaWhckWN4NLXoD9AVFKp5R},
}
1.
Britz K, Casini G, Meyer T, Moodley K, Sattler U, Varzinczak I. Principles of KLM-style Defeasible Description Logics. Transactions on Computational Logic. 2020;22 (1). doi:10.1145/3420258.
@article{433,
author = {Katarina Britz, Giovanni Casini, Tommie Meyer, Kody Moodley, Uli Sattler, Ivan Varzinczak},
title = {Principles of KLM-style Defeasible Description Logics},
abstract = {},
year = {2020},
journal = {Transactions on Computational Logic},
volume = {22 (1)},
pages = {1-46},
publisher = {ACM},
url = {https://dl-acm-org.ezproxy.uct.ac.za/doi/abs/10.1145/3420258},
doi = {10.1145/3420258},
}
1.
Paterson-Jones G, Casini G, Meyer T. BKLM - An expressive logic for defeasible reasoning. 18th International Workshop on Non-Monotonic Reasoning. 2020.
@misc{383,
author = {Guy Paterson-Jones, Giovanni Casini, Tommie Meyer},
title = {BKLM - An expressive logic for defeasible reasoning},
abstract = {},
year = {2020},
journal = {18th International Workshop on Non-Monotonic Reasoning},
month = {12/09/2020-24/09/2020},
}
1.
Casini G, Meyer T, Varzinczak I. Rational Defeasible Belief Change. In: 17th International Conference on Principles of Knowledge Representation and Reasoning (KR 2020). Virtual: IJCAI; 2020. doi:10.24963/kr.2020/22.
@{382,
author = {Giovanni Casini, Tommie Meyer, Ivan Varzinczak},
title = {Rational Defeasible Belief Change},
abstract = {},
year = {2020},
journal = {17th International Conference on Principles of Knowledge Representation and Reasoning (KR 2020)},
pages = {213-222},
month = {12/09/2020},
publisher = {IJCAI},
address = {Virtual},
url = {https://library.confdna.com/kr/2020/},
doi = {10.24963/kr.2020/22},
}
