Network Analysis Group

Computer Science department
Aalto University

Team Members

  • Barbara Keller
  • Yan Xia ( Doctoral student 2021 → )
  • Hitesh Goel ( Summer Intern 2024)
  • Jiaming Jiang ( Summer Intern 2024)
  • Duong Nguyen ( Summer Intern 2024)
  • Longtao Wang ( Summer Intern 2024)


Alumni



Barbara Keller

University Lecturer, tenured in 2021.

Research Interests

I am interested in Network Analysis and Distributed Computing. While I like analyzing big data with the help of networks, I am focused on more local questions with respect to distributed graph algorithms. I particularly like to investigate networks formed in the real world exhibiting social phenomena. Summarized to one sentence: I like graphs and investigating their properties.

I like all sorts of puzzles that are easy to state and not (necessarily) so easy to solve. I am always up for new topics and ideas.

Contact Information

Email:
Office: B334, Computer Science Building
Konemiehentie 2, 02150 Espoo, Finland

Teaching

Fall 2024

Fall 2023

Fall 2022

Fall 2021

Fall 2020

Publications

2024

TitleAuthorsConferenceLink
The Russian invasion of Ukraine selectively depolarized the Finnish NATO discussion on Twitter Yan Xia, Antti Gronow, Arttu Malkamäki, Tuomas Ylä-Anttila, Barbara Keller and Mikko Kivelä EPJ Data Science ArXiv

2023

TitleAuthorsConferenceLink
Minority Stress Experienced by LGBTQ Online Communities during the COVID-19 Pandemic Yunhao Yuan, Gaurav Verma, Barbara Keller and Talayeh Aledavood ICWSM DOI
Mental health coping stories on social media: A causal-inference study of Papageno effect Yunhao Yuan, Koustuv Saha, Barbara Keller, Erkki Tapio Isometsä and Talayeh Aledavood WWW DOI
Dynamics of the negative discourse toward COVID-19 vaccines: topic modeling study and an annotated data set of Twitter posts Gabriel Lindelöf, Talayeh Aledavood and Barbara Keller JMIR DOI

2021

TitleAuthorsConferenceLink
Efficient Load-Balancing through Distributed Token Dropping Sebastian Brandt, Barbara Keller, Joel Rybicki, Jukka Suomela and Jara Uitto SPAA Arxiv

2020

TitleAuthorsConferenceLink
Mixed preferential attachment model: Homophily and minorites in social networks Chen Avin, Hadassa Daltrophe, Barbara Keller, Zvi Lotker, Claire Mathieu, David Peleg and Yvonne-Anne Pignolet Physica A: Statistical Mechanics and its Applications Link

2016

TitleAuthorsConferenceLink
A Lower Bound for the Distributed Lovász Local Lemma Sebastian Brandt, Orr Fischer, Juho Hirvonen, Barbara Keller, Tuomo Lempiäinen, Joel Rybicki, Jukka Suomela and Jara Uitto STOC Link

2015

TitleAuthorsConferenceLink
Overcoming Obstacles with Ants Barbara Keller, Tobias Langner, Jara Uitto and Roger Wattenhofer OPODIS Link
Homophily and the Glass Ceiling Effect in Social Networks Chen Avin, Barbara Keller, Zvi Lotker, Claire Mathieu, David Peleg and Yvonne-Anne Pignolet ITCS Link

2014

TitleAuthorsConferenceLink
How even Tiny Influence can have a Big Impact! Barbara Keller, David Peleg and Roger Wattenhofer FUN Link

2013

TitleAuthorsConferenceLink
Convergence in (Social) Influence Networks Silvio Frischknecht, Barbara Keller and Roger Wattenhofer DISC Link

2012

TitleAuthorsConferenceLink
On the Feasibility of Opportunistic Ad Hoc Music Sharing Barbara Keller, Philippe von Bergen, Roger Wattenhofer and Samuel Welten MDC Link