Mitarbeiterinnen und Mitarbeiter

PhD Roberto Ulloa
Computational Social ScienceData Science
Mitarbeiter*in
+49 (0221) 47694-228
Roberto•Ulloa[at]gesis•org
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Vita
Research Interests
- Opinion dynamics, social influence, group formation
- Agent-based computer simulations
- Social network analysis
- Digital behavioral patterns
- Dynamics of online tracking data
Selected Contributions
Makhortykh, M.,
Urman A., & Ulloa, R. (2020). How search engines disseminate
information about COVID-19 and why they should do better. Harvard Kennedy
School Misinformation Review, 1(3). doi: 10.37016/mr-2020-017
Ulloa, R., and Celina Kacperski. 2020. A Simulation of the Resilience of Cultural Diversity in the Face of Large-Scale Events. http://arxiv.org/abs/2003.05322.
Kacperski, C., Ulloa, R., & Hall, C. (2019). Do Athletes Imagine Being the Best, or Crossing the Finish Line First? A Mixed Methods Analysis of Construal Levels in Elite Athletes’ Spontaneous Imagery. Journal of Mixed Methods Research, 13(2), 216–241. doi: 10.1177/1558689816674563
Ulloa, R. & Froese, T. (2016). Nobility-targeting raids among the Classic
Maya: Cooperation in scale-free networks persists under tournament attack when
population size fluctuates. Proceedings of the Artificial Life Conference
2016. Cancun, Mexico: MIT press, 472-479. doi:10.7551/978-0-262-33936-0-ch077
Veröffentlichungen
Publikation
Nach obenZeitschriftenaufsatz
Makhortykh, Mykola, Aleksandra Urman, and Roberto Ulloa. 2020. "How search engines disseminate information about COVID-19 and why they should do better." The Harvard Kennedy School (HKS) Misinformation Review 1 (Special Issue on COVID-19 and Misinformation): 1-12. doi: http://dx.doi.org/10.37016/mr-2020-017.
Ulloa, Roberto. 2016. "CulSim: A simulator of emergence and resilience of cultural diversity." SoftwareX 5 150-155. doi: http://dx.doi.org/10.1016/j.softx.2016.07.005.
Ulloa, Roberto, Celina Kacperski, and Craig Hall. 2016. "Do athletes imagine being the best, or crossing the finish line first? A mixed methods analysis of construal levels in elite athletes’ spontaneous imagery." Journal of Mixed Methods Research 13 (2): 216-241. doi: http://dx.doi.org/10.1177/1558689816674563.
Ulloa, Roberto, Celina Kacperski, and Fernando Sancho-Caparrini. 2016. "Institutions and cultural diversity: Effects of democratic and propaganda processes on local convergence and global diversity." PLoS ONE 11 (4). doi: http://dx.doi.org/10.1371/journal.pone.0153334.
Nach obenBeitrag im Sammelwerk
Makhortykh, Mykola, Aleksandra Urman, and Roberto Ulloa. 2021 (Forthcoming). "This is what pandemic looks like: Visual framing of COVID-19 on search engines." In Pandemic Rhetoric, edited by John Pollock, and Douglas Vakoch,
Ulloa, Roberto, and Tom Froese. 2016. "Nobility-targeting raids among the Classic Maya: Cooperation in scale-free networks persists under tournament attack when population size fluctuates." In Proceedings of the Artificial Life Conference 2016, 472-479. MIT Press. doi: http://dx.doi.org/10.7551/978-0-262-33936-0-ch077.
Ulloa, Roberto, and Gabriela Barrantes. 2012. "Snapshot of the position of a site in the Internet: Vector space model applied to external pages." In Proceedings of the XXXVIII Latin American Informatics Conference, IEEE. doi: http://dx.doi.org/10.1109/CLEI.2012.6427223.
Ulloa, Roberto. 2009. "Parallel opponent modelling with knowledge domain: Direct search of strategies in multi-agent systems." In Proceedings of the XXXV Latin American Informatics Conference, CLEI. doi: http://dx.doi.org/10.13140/RG.2.1.2688.2803.
Ulloa, Roberto, and Gabriela Barrantes. 2008. "Building a scenario for the simulation of attacks on systems of agents." In Jornadas Chilenas de Computación, doi: http://dx.doi.org/10.13140/RG.2.1.4785.4324.
Nach obenMonographie
Ulloa, Roberto. 2016. Cultural Diversity in Artificial Societies: Case Studies of the Maya Peoples. Electronic Thesis and Dissertation Repository. The University of Western Ontario. https://ir.lib.uwo.ca/etd/4231 .
Ulloa, Roberto. 2015. Kivy: Interactive Applications and Games in Python. Packt Publishing.
Ulloa, Roberto. 2013. Kivy: Interactive Applications in Python . Packt Publishing.
Ulloa, Roberto. 2011. Uso de aleatorización como un mecanismo de defensa frente a la inferencia de estrategias en sistemas multiagente. MSc Dissertation. Universidad de Costa Rica. Sistema de Estudios de Posgrado. http://repositorio.sibdi.ucr.ac.cr:8080/jspui/handle/123456789/2545.
Nach obenArbeits- und Diskussionspapier
Ulloa, Roberto, and Celina Kacperski. 2020. A simulation of the resilience of cultural diversity in the face of large-scale events. ArXiV Preprint. http://arxiv.org/abs/2003.05322.
Nach obenVariable Report
2012. Recognition between Baroque and Renaissance Style of Classic Paintings. doi: http://dx.doi.org/10.13140/RG.2.1.3154.9203.
Vortrag
Nach obenKonferenzbeitrag
Urman, Aleksandra, Mykola Makhortykh, and Roberto Ulloa. 2021. "Auditing source diversity bias in video search results using virtual agents ." 30th The Web Conference, 12.04.2021.
Urman, Aleksandra, Mykola Makhortykh, and Roberto Ulloa. 2021. "Detecting race and gender bias in visual representation of AI on web search engines." 43rd EUROPEAN CONFERENCE ON INFORMATION RETRIEVAL, 01.04.2021.
Ulloa, Roberto. 2021. "Hey, Google, tell me what the Holocaust looked like: Visual framing of mass atrocities by search engines." Three-Country Conference on Communication Science (DACH21), Universität Zürich, 08.04.2021.
Makhortykh, Mykola, Aleksandra Urman, and Roberto Ulloa. 2021. "Poster on Hey Google, what was the Holocaust about? Auditing How Search Engine Algorithms Structure Memories About Mass Atrocities." Memory and Media Conference , 01.04.2021.
Makhortykh, Mykola, Aleksandra Urman, and Roberto Ulloa. 2021. "Scaling virtual agent-based testing for cross-platform analysis of algorithmic content curation." Three-Country Conference on Communication Science, Universität Zürich, 07.04.2021.
Urman, Aleksandra, Mykola Makhortykh, and Roberto Ulloa. 2020. "Poster on Auditing search engines: The case of the 2020 US presidential election campaign." Virtuell: Socinfo 2020, 06.10.2020.
Makhortykh, Mykola, Aleksandra Urman, and Roberto Ulloa. 2020. "This is what pandemic looks like: Visual framing of COVID-19 on search engines." 14th General Conference (ECPR 2020), 24.08.2020.
Ulloa, Roberto. 2020. "To track or not to track: Examining perceptions of online tracking in the context of information behaviour research." Online: 70th Annual ICA Conference, Open Communication, 21.05.2020.
Urman, Aleksandra, Mykola Makhortykh, Teresa Gil-Lopez, and Roberto Ulloa. 2020. "Would you kindly let us track you?: Examining perceptions of online tracking in the context of information behaviour research." 9th biennial Surveillance & Society conference of the Surveillance Studies Network, Erasmus University Rotterdam, Rotterdam, Netherlands, 07.06.2020.
Ulloa, Roberto. 2016. "Nobility-targeting raids among the Classic Maya: Cooperation in scale-free networks persists under tournament attack when population size fluctuates." Poster on XV Conference on the Synthesis and Simulation of Living Systems.
Kacperski, Celina, Roberto Ulloa, and Craig Hall. 2014. "A qualitative analysis of construal levels in sport imagery." ASP - Performing under Pressure.
Suárez, Juan Luis, Javier de la Rosa, and Roberto Ulloa. 2013. "Poster on Not Exactly Prima Facie: Understanding the Representation of the Human Through the Analysis of Faces in World Painting." Digital Humanities 2013 Conference.
Ulloa, Roberto. 2012. "Snapshot of the position of a site in the Internet: Vector space model applied to external pages." XXXVIII Latin American Informatics Conference, 05.03.2013.
Ulloa, Roberto. 2009. "Parallel opponent modelling with knowledge domain: Direct search of strategies in multiagent systems." XXXV Latin American Informatics Conference.
Ulloa, Roberto. 2008. "Building a scenario for the simulation of attacks on systems of agents." Jornadas Chilenas de Computación. doi: http://dx.doi.org/10.13140/RG.2.1.4785.4324.
Nach obenBeitrag nicht auf Konferenz
Ulloa, Roberto. 2016. "CulSim: Emergence and Resilience of Cultural Diversity in a Computer Simulator." Poster on 3rd GESIS Computational Social Science Winter Symposium.
Sonstiges
Flöck, Fabian, Kenan Erdogan, Roberto Ulloa, and Maribel Acosta. 2015. "WikiWho Web Service : Extraction of Wikipedia Editor Interactions and Change Tracking."