Organised by
ISIF		 In Association with
USAL UC3M		 Supported by
IEEE

T03 - Belief Fusion and Bayesian Reasoning with Subjective Logic

This tutorial gives attendees a first-hand insight into the theory and application of subjective logic by
the author and researcher who proposed and started developing this framework in 1997.
Subjective logic provides a rich set of operators for combining opinions that can be used for modelling, classifying and analyzing situations involving uncertainty such as e.g. Bayesian networks and trust networks. This tutorial gives an introduction to subjective logic, and focuses on:

  1. Representation and interpretation of subjective opinions
    1. Formal representation of binomial, multinomial and hyper opinions
    2. Correspondence between subjective opinions and other relevant representations of trust such as binary logic propositions, probabilities, Dempster-Shafer belief functions,
    3. Expressing opinions as PDFs (probability density functions) and fuzzy verbal categories
  2. Algebraic operators of subjective logic
    1. Operators for binomial opinions: transitivity, fusion, product, coproduct
    2. Operators for multinomial and hyper opinions: conoditional deduction and abduction, fusion
  3. Applications of subjective logic
    1. Fusion of uncertain and incomplete information b. Classification and analysis of Bayesian networks c. Modelling and analysis of trust networks

Instructor biography

Dr. Audun Jøsang, Professor at the University of Oslo in Norway, and Adjunct Professor at Queensland University of Technology in Australia.

Prof. Jøsang is the author of subjective logic which is being applied worldwide by industry and academia in the areas of uncertainty reasoning, trust reasoning and belief fusion. Applications and tools based on subjective logic are developed and used e.g. by the DSTO in Australia, US Defence, Norwegian Defence, by the US based 21st Century Systems Inc. http://www.21csi.com, and by Veriluma in Australia http://www.veriluma.com/.

Audun Jøsang joined the Oslo University in 2008 after having served as Associate Professor at QUT and research leader for IT security at DSTC in Australia, system design engineer at Alcatel Telecom in Belgium and research scientist at Telenor in Norway. He was also Associate Professor at the Norwegian University of Science and Technology (NTNU). Prof. Jøsang has a Master's in Information Security from Royal Holloway College, University of London, and a PhD from NTNU.

Prof. Jøsang teaches undergrad and postgraduate courses and has supervised numerous Masters and PhD students at in Australia (QUT) and in Norway (NTNU and University of Oslo).

Prof. Jøsang is regularly being invited as keynote speaker and gives tutorials at international conferences.

Prof. Jøsang has published more than 100 journal articles and conference papers that have been cited more than 8000 times. Prof. Jøsang’s current citations h-index = 40.