Title Ph.D. thesis: User Behavior in Microblogs with a Cultural Emphasis.
Universitat Pompeu Fabra, Barcelona-Spain. Public defense: 02/2015. |pdf|slides|
Finalist Big Data awards (BigDataCoe)

Master thesis: Hybrid Methods for Recommending Connections in Online Social Networks.
Universitat Pompeu Fabra, Barcelona-Spain. Defense: 07/2010. |pdf|slides|

B.S thesis: Desarrollo de un Software Multimedia Educativo para el Área de Matemáticas de Quinto Año de Educación Básica.
Escuela Politécnica del Ejército, Quito-Ecuador. Defense: 07/2007. |pdf|slides|

Invited Talks

Cultural Trails and Collective Memory in Online Data
Oxford Brookes University, March 2016, Oxford UK.

Online Collective Memory
FutureEverything 2016, Manchester-UK, 2016


The memory remains: Understanding collective memory in the digital age.
In Science Advances, 3(4): e1602368. doi:10.1126/sciadv.1602368. April 05, 2017. |pdf|

Even good bots fight: The case of Wikipedia.
In PLOS ONE, 12(2): e0171774. doi: 10.1371/journal.pone.0171774. February, 2017. |pdf|

Dynamics of Disagreement: Large-Scale Temporal Network Analysis Reveals Negative Interactions in Online Collaboration.
In Scientific Reports 6, Article number: 36333. doi:10.1038/srep36333. November, 2016. |pdf|

Dynamics and Biases of Online Attention: The Case of Aircraft Crashes.
In The Royal Society Open Science. Volume 3. Number 10. Royal Society Publishing. October 2016. [Featured on MIT Technology Review, Science and The Guardian]

Language, Twitter and Academic Conferences.
The 26th ACM Conference on Hypertext and Social Media, 1-4 September 2015, Cyprus. |pdf|slides|

Who are my Audiences? A Study of the Evolution of Target Audiences in Microblogs.
The 6th International Conference on Social Informatics (SocInfo), 2014 November 10-13, Barcelona, Spain. |pdf|slides|

Follow My Friends This Friday! An Analysis of Human-generated Friendship Recommendations.
The 5th International Conference on Social Informatics (SocInfo), 2013 November 25-27, Kyoto, Japan. [Best paper award] |pdf|slides|

Twitter ain't Without Frontiers: Economic, Social, and Cultural Boundaries in International Communication.
The 17th ACM Conference on Computer Supported Cooperative Work and Social Computing (CSCW), 2014 February 15-19, Baltimore, Maryland, USA. |pdf|

Cultural Dimensions in Twitter: Time, Individualism and Power. [Honored mention] .
The 7th International AAAI Conference on WebLogs and Social Media. Boston, USA

Using Eye Tracking to Identify Cultural Differences in Information Seeking Behavior .
Workshop Many People, Many Eyes (in CHI 2013). Paris, France

On the Quest of Discovering Cultural Trails in Social Media .
Sixth ACM International Conference on Web Search and Data Mining 2013, Rome, Italy

Do All Birds Tweet the Same? Characterizing Twitter Around the World
ACM International Conference on Information and Knowledge Management 2011, Glasgow, Scotland

Microblogging without Borders: Differences and Similarities. .
Poster session at ACM WebSci, 11. Koblenz, Germany

Weighted Content Based Methods for Recommending Connections in Online Social Networks
Workshop on Recommender Systems and the Social Web in the 2010 ACM Recsys Conference. Barcelona, Spain.