Goals & Projects

Studying Structure and Dynamics of Large-Scale Socio-Cultural Systems:

Developing new measures, and as necessary, optimizing existing ones to analyze the structure and dynamics of large networks within a reasonable amount of time and developing approximation algorithms for network metrics that allow for estimating timeliness and fidelity.

Tackling the multi-layer bias problem of social media data to increase the value of these data for studying research questions of the "offline" world.

Developing visual analytics methods for network data that facilitate analytical reasoning by utilizing the human power to capture complex interrelations and revealing insights into human perception in the context of network drawings.

Developing stable methodological and theoretical foundations to apply network analysis methods to research problems in a very diverse array of scientific fields.

In the following you can find my current research projects.

Online Firestorms

Online Firestorms

Understanding Negative Word of Mouth Dynamics in Social Media Networks

An online firestorm is the sudden discharge of large quantities of messages containing negative word of mouth and complaint behavior against a person, company, or organization in social media networks. Our primary objective of this project is to understand the driving factors of social media group level phenomena that lead to online firestorms and to offer approaches on how to early detect these dynamics.

Project Period: 2014-2015

Big Data, Big Networks

Big Data, Big Networks

Imagine 100 Billion Tweets and millions of newspaper articles stored on 200TB of hard drive space. In this project we develop approaches to handle and analyze these data in a computer cluster system (HPCC). We also extract and analyze networks with hundreds of millions of nodes.

Project Period: 2014-2016

Partner: » LexisNexis Risk Solutions

Highly Configurable Software Systems

Highly Configurable Software Systems

In highly configurable software systems the configuration space is too big for (re-)certifying every configuration in isolation. In this project, we combine software analysis with network analysis to detect which configuration options interact and which have local effects. Instead of analyzing a system as Linux and SELinux for every combination of configuration settings one by one (>10^2000 even considering compile-time configurations only), we analyze the effect of each configuration option once for the entire configuration space.

Project Period: 2014-2017

Partner: » Christian Kästner (CMU)

Multi-Model Run-Time Security Analysis

Multi-Model Run-Time Security Analysis

Our research focuses on creating the scientific foundations to support model-based run-time diagnosis and repair of security attacks. In the proposed research we develop a rigorous basis for composing software architectural models with organizational network models to provide much richer capabilities than is available from either in isolation. Network models complement architectural models in two ways: (a) to characterize the organizational context of a system, and (b) to detect anomalies through network representations of architectural behavior.

Project Period: 2014-2017

Partners: » David Garlan (CMU) » Bradley Schmerl (CMU)

From Sensors to Tweeters

From Sensors to Tweeters

A Sustainable Sociotechnical Approach for Detecting, Mitigating, and Building Resilience to Hazards

Decision making in disaster environments requires a sociotechnical approach that integrates the science of the natural physical environment with analysis of the interdependent conditions among technical, organizational, cultural, and socioeconomic sub-systems in any community which, when disrupted, escalate hazard events into disasters. We explore the process of building community resilience to hazards that involves geophysical, engineered, technical, computational, organizational, communication and socioeconomic systems.

Project Period: 2013-2015

Partners: » Pittsburgh University » Woods Hole Oceanographic Institution » Northwestern University

Multi-Source Assessment of State Stability

Multi-Source Assessment of State Stability

Our primary objective is to understand the way in which media - social and traditional - can be used to affect state stability or instability by states, individuals, groups and corporations. A secondary objective is to identify indicators in social media and traditional media that can be used as signals of changes in trust, norms, influence, lines of stability, and lines of alliance or competition that could predict state instability.

Project Period: 2013-2015

Partners: » Arizona State University » University of Massachusetts Lowell

Decomposing Network Algorithms

Decomposing Network Algorithms

Composability of Big Data and Algorithms for Social Networks Analysis Metrics

A network of humans, organizations, etc. is modeled with a graph G = (N,E) by aggregation of observed interactions E between targeted entities N. Composing network analysis metrics by running modified algorithms on disjunct sub-graphs G1, G2, ... results in shorter calculation times by using less memory space.

Project Period: 2013-2014

Edge Analytics

Edge Analytics

Context-Aware Network Analysis in Resource-Constrained Environments

Current network analytics strategies are inappropriate for big data in resource-constrained environments. In this research project we deliver lightweight algorithms based on approximation, incremental update, and pre-calculation where possible. We develop a reference architecture and prototype implementation.

Project Period: 2012-2013

Partners: » Software Engineering Institute » Carnegie Mellon University

Modeling State Stability

Modeling State Stability

A Structural Approach to the Incorporation of Cultural Knowledge in Adaptive Adversary Models

The overall goal of this multidisciplinary research is to develop grounded culturally sensitive theories & flexible, robust and scalable computational techniques for modeling and predicting the adaptive behavior of adversaries in asymmetric threat environments as well as dynamics in context of conflicts and revolutions (Arab Spring). » Read more

Project Period: 2008-2013

Partners: » Rhode Island College » East Carolina University

Serious Beats

Serious Beats

The Question for Diversity within Social Networks and Online Social Games

In what ways do media and technology use - especially online social gaming - allow young people of foreign descent to understand cultural diversity and engage more fully in "mainstream" society? What aspects of media usage encourage these patterns? Action Research: An online social game where youngsters collaborate online across district borders to fulfill game requests is produced. We analyze the social networks of the players online but also offline by making use of interviews. » Read more

Project Period: 2010-2013

Partners: » University of Vienna » Vienna University of Technology » Rider University

Neighborhood Cultures

Neighborhood Cultures

"...and in the end my street won't be the same"

An evaluation of the exhibition "2-3 street" by Jochen Gerz in Duisburg, Dortmund and Mülheim (European Capital of Culture: RUHR.2010). The aim of the project is to better understand the structure (composition) and the functionality (social support) of neighborhood networks as well as the impact of a cultural intervention. » Read more

Project Period: 2010-2012

Partner: » University of Hamburg

VIENA

VIENA

Visual Enterprise Network Analytics

Visual Analytical approach towards Social Network Analysis, integrating the structural and process-oriented view on organizations, making it accessible for business affordances by Visual Analytics and Usability Engineering. » Read more

Project Period: 2009-2011

Partners: » Danube University Krems » Research Studios Austria FG » BOC Information Technologies Consulting AG

Philipp Schwartz Initiative of the Humboldt Foundation

Philipp Schwartz Initiative of the Humboldt Foundation

I am the host of TUM's successful proposal at the Philipp Schwartz Initiative of the Humboldt Foundation. We are funded to take in a threatened foreign researchers for two years who is seeking refuge in Germany because he is threatened by war and persecution in his homeland. » Read more

Project Period: 2017-2019

Service

4.2018Program Commitee - WWW 2018
International World Wide Web Conferences
Lyon, France » Website
11.2017Program Commitee - Eurosymposium17
European Symposium Series on Societal Challenges in Computational Social Science: Inequality and Imbalance
London, UK » Website
9.2017Scientific Committee: - EUSN 2017
Third European Conference on Social Networks
Mainz, Germany » Website
8.2017Program Committee - IoP 2017
3rd IEEE International Conference on Internet of People
San Francisco, USA » Website
7.2017Program Committee - css-summer17
Summer School Series on Methods for Computational Social Science
Sardinia, Italy » Website
7.2017Tutorial Co-Chair - IC2S2 2017
Conference on Computational Social Science
Cologne, Germany » Website
7.2017Program Committee - ASONAM 2017
IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining
Sydney, Australia » Website
6.2017Program Committee - WebSci '17
ACM Web Science Conference 2017
Troy, NY, USA » Website
5.2017Senior Program Committee, Workshop Chair - ICWSM 2017
International AAAI Conference on Web and Social Media
Montreal, Canada » Website
3.2017International Review Board - GOR 2017
General Online Research
Berlin, Germany » Website
12.2016Program Committee - SOCIALCOM 2016
9th IEEE International Conference on Social Computing and Networking
Atlanta, GA, USA » Website
11.2016Program Committee - CSSWS16
Computational Social Science Winter Symposium 2016
Cologne, Germany » Website
11.2016Program Committee - BDDAC 2016
4th International Symposium on Big Data and Data Analytics in Collaboration
Orlando, FL, USA » Website
7.2016Program Committee - IoP 2016
2nd IEEE International Conference on Internet of People
Toulouse, France » Website
5.2016Senior Program Committee - ICWSM 2016
International AAAI Conference on Web and Social Media
Cologne, Germany » Website
4.2016Advisory Committee - IMMM 2016
International Conference on Advances in Information Mining and Management
Valencia, Spain » Website
3.2016International Review Board - GOR 2016
General Online Research
Dresden, Germany » Website
12.2015Program Committee - SocialCom 2015
The 8th IEEE International Conference on Social Computing and Networking
Chengdu, Sichuan, China » Website
11.2015Program Committee - SOTICS 2015
The Fifth International Conference on Social Media Technologies, Communication, and Informatics
Barcelona, Spain » Website
10.2015Program Committee - BusinessVis15
IEEE Workshop on Visualization in Business
Chicago, IL, USA » Website
9.2015Program Committee - Hypertext 2015
ACM Conference on Hypertext and Social Media
Cyprus » Website
6.2015Session organizer Sunbelt - Social Media and Trust
Brighton, England » Website
5.2015Organizer - ICWSM-Workshop 2015
Workshop on Standards and Practices in Large-Scale Social Media Research
Part of: International AAAI Conference on Web and Social Media (ICWSM)
Oxford, UK » Website
5.2015Advisory Committee - IMMM 2015
International Conference on Advances in Information Mining and Management
Brussels, Belgium » Website
4.2015Program committee - Hot SoS 2015
Symposium and Bootcamp on the Science of Security
Urbana-Champaign, USA » Website
12.2014Program committee - SocialCom 2014
7th IEEE International Conference on Social Computing and Networking
Sydney, Australia » Website
11.2014Program committee - BESC 2014
Conference:International Conference on Behavior, Economic and Social Computing
Shanghai, China » Website
10.2014Program committee - SOTICS 2014
International Conference on Social Eco-Informatics
Nice, France » Website
8.2014Program committee - SNAM-DT/FNC 2014
International Workshop on Social Network Analysis and Mining using Digital Technology
Part of: The 9th International Conference on Future Networks and Communications
Niagara Falls, Canada » Website
8.2014Program committee - ASONAM 2014
International Conference on Advances in Social Networks Analysis and Mining
Beijing, China » Website
7.2014Program committee - IMMM 2014
International Conference on Advances in Information Mining and Management
Paris, France » Website
7.2014Award Committee EUSN - Outstanding Visualization Award
1st European Conference on Social Networks
Barcelona, Spain » Website
5.2014Program committee - CTS/BDDAC 2014
Second International Symposium on Big Data and Data Analytics in Collaboration
Part of: International Conference on Collaboration Technologies and Systems
Minneapolis, USA » Website
4.2014Judge Grand Data Challenge - SBP 2014
International Conference on Social Computing, Behavioral-Cultural Modeling, and Prediction
Washington DC, USA » Website
11.2013Program committee - SOTICS 2013
International Conference on Social Eco-Informatics
Lisbon, Portugal » Website
11.2013Program committee - IMMM 2013
International Conference on Advances in Information Mining and Management
Lisbon, Portugal » Website
8.2013Program committee - ASONAM 2013
International Conference on Advances in Social Networks Analysis and Mining
Niagara Falls, Canada » Website
5.2013Program committee - CTS/BDDAC 2013
First International Symposium on Big Data and Data Analytics in Collaboration
Part of: International Conference on Collaboration Technologies and Systems
San Diego, USA » Website
5.2013Session organizer Sunbelt - Large Scale Network Analysis
Social Networks Conference of the International Network for Social Network Analysis (INSNA)
Hamburg, Germany » Website
8.2012Program committee - CSOSN 2012
1st International Workshop on Cybersecurity of Online Social Networks
Istanbul, Turkey » Website
8.2012Program committee - ASONAM 2012
International Conference on Advances in Social Networks Analysis and Mining
Istanbul, Turkey » Website
5.2012Program committee - Network Conference
Conference on Practical Applications of Network Theory
Frankfurt, Germany » Website
5.2009Organizing committee - Network Conference
Conference on Visualization of Social Networks
Munich, Germany » Website
1.2006Organizing committee - The Age of Simulation
Part of: Ars Electronica 2006
Linz, Austria » Website
10.2004Organizing committee - Language of Networks
Part of: Ars Electronica 2004
Linz, Austria » Website