Johnnatan Messias

I work on fairness concerns on proof-of-work blockchains. More specifically, on transaction commit times on blockchains.

- I worked on machine learning projects to be applied to the risk and loan default prediction and on health insurance characterization and forecasting.

- I worked on research theory of social computing and data analysis. My research was supervised by Dr. Fabrício Benevenuto. - During this period, our work was published on [HT’17], [WI’17], [ASONAM’16], [WebMedia’15], [SBBD’15], and [BraSNAM’15].

- I was supervised by Dr. Juhi Kulshrestha and Dr. Krishna P. Gummadi. We worked on the investigating political bias in social media and web search project. - Our work has been published on [CSCW’17] and [Inf Retrieval J’19].

- I was supervised by Dr. Mainack Mondal and Dr. Krishna P. Gummadi. We worked on the managing online data privacy and security via exposure project. - Our work has been published on [SOUPS’16], [IEEE Internet Computing’17], and [Int J Adv Eng Sci Appl Math’17].

Ph.D. in Computer Science at Max Planck Institute for Software Systems - MPI-SWS and Saarland University (UdS). - My research (supervised by Dr. Krishna P. Gummadi) focuses on transaction commit times on proof-of-work blockchains.

- Two-year program. My research was supervised by Dr. Fabrício Benevenuto. - Thesis: Characterizing Interconnections and Linguistic Patterns in Twitter.

- Honors: Granted with a scholarship from the Brazilian Scientific Exchange Program (Science without Borders - CAPES) for Academic Excellence to study in a European University for fourteen months.

- Four-year program, Total Grade: 8/10. - Thesis: Framework Para Sistemas de Navegação de Veículos Aéreos Não Tripulados. - Honors: Granted with a scholarship from the Brazilian Scientific Exchange Program (Science without Borders - CAPES) for Academic Excellence to study in a European University for 14 months.