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Petra Kralj Novak

PhD, researcher at the Department of Knowledge Technologies, Jožef Stefan Institute


Short CV

My research belongs to the wide area of knowledge discovery from databases. Currently, as a postdoctoral researcher, I analyse social and mainstream media focusing on the mediated sentiment. Avant-garde research in analysing the role of emojis in conveying sentiment was published in P. Novak Kralj, et al. "Sentiment of emojis." PloS one 10.12 (2015): e0144296 and is the main reference for further research in the analysis of emoji.

My Ph.D. thesis focused on rule induction from class labeled data, where the induced rules are intended for human interpretation. The main findings of the thesis are published in Journal of Machine Learning Research and in the Encyclopaedia of Machine Learning. Besides my research in knowledge discovery from databases, I also ventured into optimization by designing and implementing GMOtreck - a system for optimization of laboratory level traceability of genetically modified organisms.

Petra Kralj Novak is now a postdoctoral researcher at the Department of Knowledge Technologies, Jožef Stefan Institute, Ljubljana, Slovenia. She completed her Ph.D. in 2009 in the area of data mining at the Jožef Stefan International Postgraduate School, Ljubljana, Slovenia. During her Ph.D. studies, she was a research assistant at the Department of Knowledge Technologies, Jožef Stefan Institute, Ljubljana, Slovenia. In addition, she was a teaching assistant at the Jožef Stefan International Postgraduate School, Ljubljana, Slovenia, and at the University of Nova Gorica, Slovenia. She has also actively collaborated in several national and European research projects. From 2006 to 2009, she was secretary and treasurer of SLAIS - the Slovenian Artificial Intelligence Society.

Research

Talks

  • Sentiment and stance analysis of social media : invited talk at Data and Complexity Day @Ca'Foscari Conference, 12. Nov. 2018, Venice, Italy.
  • Social media stance mining applications : invited talk at Southern Data Science Conference, April 14, 2018, Atlanta, GA, USA.
  • Deep learning for natural language sentiment and affect: tutorial at ECML PKDD 2018, September 14th, 2018, Dublin, Ireland.
  • Social media stance mining applications : invited talk at Southern Data Science Conference, October 18, 2018, Orlando, Florida, USA.
  • Emojis, sentiment and stance in social media : invited talk at 21st International Conference, DS 2018 Limassol, Cyprus, October 29-31, 2018.
  • Sentiment of emojis : invited talk at the 4th Conference on CMC and Social Media Corpora for the Humanities, 27-28 September 2016, Ljubljana, Slovenia.

Selected publications ( Google Scholar | COBISS)

  • Petra Kralj Novak, Jasmina Smailović, Borut Sluban, Igor Mozetič
  • Sentiment of Emojis
  • PLoS ONE 10(12): e0144296, doi:10.1371/journal.pone.0144296, 2015
  • Fabiana Zollo, Petra Kralj Novak, Michela Del Vicario, Alessandro Bessi, Igor Mozetič, Antonio Scala, Guido Caldarelli, Walter Quattrociocchi
  • Emotional dynamics in the age of misinformation
  • PLoS ONE 10(9): e0138740. doi:10.1371/journal.pone.0138740, 2015

Teaching