Guarding a Walled Garden - Semantic Privacy Preferences for the Social Web
June, 3rd 2010, Extended Semantic Web Conference, Heraklion, Crete, Greece

Reactive Policies for the Semantic Web
June, 2nd 2010, Extended Semantic Web Conference, Heraklion, Crete, Greece

SPoX - Controlling Skype Over-Notification with Social Semantic Web Policies
October, 27th 2009, ISWC's Demo Session, Chantilly, Virginia, USA

Reactivity and Social Data: Keys to Drive Privacy Decisions in Social Network Applications
October, 25th 2009, Second Workshop on Social Data on the Web (SDoW 2009), Chantilly, Virginia, USA

Using Natural Language Policies for Privacy Control in Social Platforms
June, 1st 2009, First Workshop on Trust and Privacy on the Social and Semantic Web (SPOT2009), Heraklion, Greece

Towards Logic Programs with Ordered and Unordered Disjunction
December, 13th 2008, ICLP Workshop on Answer Set Programming and Other Computing Paradigms, Udine, Italy

Exploiting Preferences for Minimal Credential Disclosure in
Policy-Driven Trust Negotiations
August, 24th 2008, VLDB-Workshop on Secure Data Management, Auckland, New Zealand

Advanced Semantic Web Policies: Preferences and Reactivity
July, 31st 2008, DERI Galway, Ireland

Decision Trees and Decision Tree Learning
June, 10th 2008. L3S Reading Group, Hannover, Germany

Reactive Policies
April, 17th 2008. L3S Research Seminar, Hannover, Germany

Exploiting Preference Queries for Searching Learning Resources
September 2007, European Conference on Technology Enhanced Learning (EC-TEL), Crete, Greece

Services for Knowledge Resource Sharing and Management in an Open Source Infrastructure
July 2007. International Conference on Advanced Learning Technology (ICALT), Niigata, Japan