Conference/Workshop Organization & Reviews

• The Web Conference (www2025), Sydney, Australia, April 28 - May 2, 2025 (Member of the PC)
• The 47^rd European Conference on Information Retrieval (ECIR 2025), Lucca, Italy, April 6-10, 2025 (Member of the PC)
• The 18^th ACM International Conference on Web Search and Data Mining (WSDM 2025), Hannover, Germany, March 10-14, 2025 (Member of the PC)
• The 33^rd ACM International Conference on Information and Knowledge Management (CIKM 2024), Boise, ID, USA, October 21-25, 2024 (Member of the PC)
• The 33^rd International Joint Conference on Artificial Intelligence (IJCAI 2024), Jeju, South Korea, August 3-9, 2024 (Member of the PC)
  
• The 47^th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2024), Washington DC, USA, July 14-18, 2024 (Member of the PC)
• The 43^rd IEEE International Conference on Distributed Computing Systems (ICDCS 2024), Jersey City, NJ, USA, July 23-26, 2024, (Member of the PC)
• The 21^st Extended Semantic Web Conference (ESWC 2024), Hersonissos, Crete, Greece, May 26-30, 2024 (Member of the PC)
• The Web Conference (www2024), Singapore, Singapore, May 13-17, 2023 (Member of the SPC and PC)
• The 46^rd European Conference on Information Retrieval (ECIR 2024), Glasgow, Scotland, March 24-28, 2024 (Member of the PC)
• The 7^th International Workshop on Narrative Extraction From Text (Text2Story 2024), in conjunction with the 45^rd European Conference on Information Retrieval (ECIR 2024), Glasgow, Scotland, March 24, 2024 (Member of the PC)
• The 17^th ACM International Conference on Web Search and Data Mining (WSDM 2024), Mérida, Yucatán, Mexico, March 4-8, 2024 (Member of the PC)
• The 32^nd ACM International Conference on Information and Knowledge Management (CIKM 2023), Birmingham, UK, October 21-25, 2023 (Member of the PC)
• The 22^nd International Conference on Cyberworlds (CW 2023), Sousse, Tunesia, October 3-5, 2023 (Member of the PC)
• The 27^th International Conference on Theory and Practice of Digital Libraries (TPDL 2023), Zadar, Croatia, September 26-29, 2023 (Member of the PC)
• The 32^nd International Joint Conference on Artificial Intelligence (IJCAI 2023), Macao, SAR, China, August 19-25, 2023 (Member of the PC)
  
• The 46^th International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2023), Taipei, Taiwan, July 23-27, 2023 (Member of the PC)
• The 43^rd IEEE International Conference on Distributed Computing Systems (ICDCS 2023), Hong Kong, SAR, China, July 18-21, 2023, (Member of the PC)
• The 20^th Extended Semantic Web Conference (ESWC 2023), Hersonissos, Crete, Greece, May 28 - June 1, 2023 (Member of the PC)
• The Web Conference (www2023), Austin, TX, USA, April 30 - May 4, 2023 (Member of the SPC and PC)
• The 13^th International Workshop on Location and the Web (LocWeb 2023), in conjunction with The Web Conference (The Web Conference 2023), Austin, TX, USA, April 30 - May 4, 2023 (Member of the PC)
• The 45^rd European Conference on Information Retrieval (ECIR 2023), Dublin, Ireland, April 2-6, 2023 (Member of the PC)
• The 6^th International Workshop on Narrative Extraction From Text (Text2Story 2023), in conjunction with the 45^rd European Conference on Information Retrieval (ECIR 2023), Dublin, Ireland, April 2, 2023 (Member of the PC)
• The 16^th ACM International Conference on Web Search and Data Mining (WSDM 2023), Singapore, February 27 - March 3, 2023 (Member of the PC)
• The 7^th International Symposium on Emerging Technologies for Education (SETE 2022), Tenerife, Spain, November 22-23, 2022 (Conference Co-Chair)
• The 7^th International Conference on Sustainable Information Engineering and Technology (SIET 2022), Malang, Indonesia, November 22, 2022 (Member of the PC)
• The 31^st ACM International Conference on Information and Knowledge Management (CIKM 2022), hybrid conference in Atlanta, GA, USA, October 17-22, 2022 (Member of the PC)
• The 26^th International Conference on Theory and Practice of Digital Libraries (TPDL 2022), Padua, Italy, September 20-23, 2022 (Member of the PC)
• The 31^st International Joint Conference on Artificial Intelligence (IJCAI 2022), Vienna, Austria, July 23-29, 2022 (Member of the PC)
  
• The 1^st International Conference on Multidisciplinary Application of Information Technology (ICOMIT 2022), Malang, Indonesia, July 14-18, 2022 (Member of the PC)
• The 19^th Extended Semantic Web Conference (ESWC 2022), Heraklion, Crete, Greece, May 29 - June 2, 2022 (Member of the PC)
• The 2^nd Workshop on Combating Online Hostile Posts in Regional Languages during Emergency Situation (CONSTRAINT 2022), in conjunction with the 60^th Annual Meeting of the Association for Computational Linguistics (ACL 2022) online, May 26-28, 2022 (Member of the PC)
• The Web Conference (www2022), Lyon, France, online, April 25-29, 2022 (Member of the PC)
• The 12^th International Workshop on Location and the Web (LocWeb 2022), in conjunction with The Web Conference (The Web Conference 2022), Lyon, France, online, April 25/26, 2022 (Member of the PC)
• The 44^th European Conference on Information Retrieval (ECIR 2022), Stavanger, Norway, April 10-14, 2022 (Member of the PC)
• The 5^th International Workshop on Narrative Extraction From Text (Text2Story 2022), 44^th European Conference on Information Retrieval (ECIR 2022), Stavanger, Norway, April 10, 2022 (Member of the PC)
• The 36^th AAAI Conference on Artificial Intelligence (AAAI-22), Vancouver, BC, Canada, February 22 - March 1, 2022 (Member of the PC)
• The 30^th ACM International Conference on Information and Knowledge Management (CIKM 2021), online hosted in Gold Coast, Queensland, Australia, November 1-15, 2021 (Member of the PC)
• The 6^th International Workshop on Computational History (HistoInformatics 2021), online, September 30 - October 1, 2021 (Member of the PC)
• The 25^th International Conference on Theory and Practice of Digital Libraries (TPDL 2021), online at the Open University, UK, September 13-17, 2021 (Member of the PC)
• The 6^th International Conference on Sustainable Information Engineering and Technology (SIET 2021), Malang, Indonesia, September 13-14, 2021 (Member of the PC)
• The 5^th International Asia Pacific Conference on Web and Big Data (APWeb-WAIM 2021), Guangzhou, China, August 23-25, 2021 (PC Co-Chair)
• The WSTNET Web Science Summer School 2020/2021 (WWSSS2020/2021), Caen, France, June 28 - July 2, 2021 (Chair)
  
• The Web Conference (www2021), Ljubljana, Slovenia, April 19-23, 2021 (Member of the PC)
• The 30^th International Joint Conference on Artificial Intelligence (IJCAI 2021), Montreal, Canada, August 21-26, 2021 (Member of the PC)
  
• The 41^st IEEE International Conference on Distributed Computing Systems (ICDCS 2021), virtual, July 7-10, 2021, (Member of the PC)
• The 18^th Extended Semantic Web Conference (ESWC 2021), Hersonissos, Greece, June 6-10, 2021 (Member of the PC)
• The 43^rd European Conference on Information Retrieval (ECIR 2021), Lucca, Italy, March 28 - April 1, 2021, (Member of the PC)
• The 4^th International Workshop on Narrative Extraction From Text (Text2Story 2021), in conjunction with the 43^rd European Conference on Information Retrieval (ECIR 2021), Lucca, Italy March 28, 2021 (Member of the PC)
• The 35^th AAAI Conference on Artificial Intelligence (AAAI-21), virtual, February 2-9, 2021 (Member of the PC)
• The Workshop on Artificial Intelligence for Narratives 2020 (AI4NARRATIVES 2020), in conjunction with 29^th Intl. Joint Conf. on Artificial Intelligence and the 17^th Pacific Rim Intl. Conf. on Artificial Intelligence (IJCAI-PRICAI 2020), Yokohama, Japan, July 11-17, 2020 (Member of the PC)
  
• The 5^th IEEE International Conference on Data Science in Cyberspace (ICDSC 2020), Hong Kong, SAR, China, June 24-27, 2020 (PC Co-Chair)
• The 4^th International Workshop on Mining Actionable Insights from Social Networks (MAISoN 2020), in conjunction with The Web Conference (The Web Conference 2020), Taipei, Taiwan, April 20-24, 2020 (Member of the PC)
• The 24^th International Conference on Theory and Practice of Digital Libraries (TPDL 2020), Lyon, France, August 25-28, 2020 (Publicity Chair [France] & Member of the PC)
• The 17^th Extended Semantic Web Conference (ESWC 2020), Heraklion, Crete, Greece, May 31 - June 4, 2020 (Member of the PC)
• The 40^th IEEE International Conference on Distributed Computing Systems (ICDCS 2020), Singapore, Singapore, July 8-10, 2020, (Member of the PC)
• The 10^th International Temporal Web Analytics Workshop (TempWeb 2020), in conjunction with The Web Conference (The Web Conference 2020), Taipei, Taiwan, April 20-24, 2020 (Workshop Co-Chair)
• The Web Conference (The Web Conference 2020), Taipei, Taiwan, April 20-24, 2020 (Member of the PC)
• The 42^nd European Conference on Information Retrieval (ECIR 2020), Lisbon, Portugal, April 14-17, 2020, (Member of the PC)
• The 5^th International Workshop on Computational History (HistoInformatics 2019), Singapore, Singapore September 12, 2019 (Member of the PC)
• The Web Conference (www2019), San Francisco, CA, USA, May 13-17, 2019 (Member of the PC)
• The 9^th International Temporal Web Analytics Workshop (TempWeb 2019), in conjunction with The Web Conference (www2019), San Francisco, CA, USA, May 13-17, 2019 (Workshop Co-Chair)
• The 2^nd International Workshop on Narrative Extraction From Text (Text2Story 2019), Cologne, Germany April 14, 2019 (Member of the PC)
• The 16^th International Conference on COnférence en Recherche d'Information et Application (CORIA 2019), Lyon, France, March 27-29, 2019 (Member of the PC)
• The 16^th Extended Semantic Web Conference (ESWC 2019), Portož, Slovenia, June 2-6, 2019 (Member of the PC)
• The 17^th International Conference on Web-based Learning (ICWL 2018), Chiang Mai, Thailand, August 22-24, 2018 (Program Co-Chair)
• The 18^th International Conference on Web Engineering (ICWE 2018), Cáceres, Spain, June 5-8, 2018 (Member of the PC)
• The 8^th International Temporal Web Analytics Workshop (TempWeb 2018), in conjunction with The Web Conference (www2018), Lyon, France, April 25-27, 2018 (Workshop Co-Chair)
• The 1^st International Workshop on Narrative Extraction From Text (Text2Story 2018), Grenoble, France March 26, 2018 (Member of the PC)
• The 4^th International Workshop on Computational History (HistoInformatics 2017), Singapore, Singapore, November 6, 2017 (Member of the PC)
• The 16^th International Conference on Web-based Learning (ICWL 2017), Cape Town, South Africa, September 20-22, 2017 (Member of the PC)
• The ACM/IEEE-CS Joint Conference on Digital Libraries (JCDL 2017), Toronto, Canada, June 19-23, 2017 (Member of the PC)
• The 20^th International Workshop on the Web and Databases (WebDB 2017), in conjunction with (SIGMOD/PODS 2017), Raleigh, NC, USA, May 14-19, 2017 (Member of the PC)
• The 7^th International Temporal Web Analytics Workshop (TempWeb 2017), in conjunction with the 26^th World Wide Web Conference (www2017), Perth, Australia, April 3-7, 2017 (Workshop Co-Chair)
• The International Workshop on Mining Actionable Insights from Social Networks (MAISoN 2017), in conjunction with the 10^th ACM International Conference on Web Search and Data Mining (WSDM 2017), Cambridge, UK February 6-10, 2017 (Member of the PC)
• The 15^th International Conference on Web-based Learning (ICWL 2016), Rome, Italy, October 26-29, 2016 (Conference Co-Chair & Member of the PC)
• The 3^rd International Workshop on Computational History (HistoInformatics 2016), Krakow, Poland, July 11, 2016 (Member of the PC)
• The 6^th International Temporal Web Analytics Workshop (TempWeb 2016), in conjunction with the 25^th World Wide Web Conference (www2016), Montreal, Canada, April 12, 2016 (Workshop Co-Chair)
• The 14^th International Conference on Web-based Learning (ICWL 2015), Guangzhou, China, November 5-8, 2015 (Member of the PC)
• The 5^th International Workshop on Semantic Digital Archives (SDA 2015), Poznan, Poland September 18th, 2015 (Member of the PC)
• The 17^th Seventeenth Portuguese Conference on Artificial Intelligence (EPIA 2015), Coimbra, Portugal, September 8-11, 2015 (Member of the PC)
• The 5^th International Temporal Web Analytics Workshop (TempWeb 2015), in conjunction with the 24^th World Wide Web Conference (www2015), Florence, Italy, May 18, 2015 (Workshop Co-Chair)
• The 29^th AAAI Conference on Artificial Intelligence (AAAI-15), Austin, TX, USA, January 25-30, 2015 (Member of the PC)
• The 14^th International Conference on Knowledge Management and Knowledge Technologies (I-Know'14), Graz, Austria, September 16-19, 2014 (Member of the PC)
• The 13^th International Conference on Web-based Learning (ICWL 2014), Tallinn, Estonia, August 14-17, 2014 (Member of the PC)
• The 2^nd International Workshop on Computational History (HistoInformatics 2014), Barcelona, Spain, November 10, 2014 (Member of the PC)
• The 4^th International Temporal Web Analytics Workshop (TempWeb 2014), in conjunction with the 23^rd World Wide Web Conference (www2014), Seoul, Korea, April 8, 2014 (Workshop Co-Chair)
• The 3^rd International Workshop on "Semantic Digital Archives" 2013 (SDA 2013), in conjunction with the 17^th International Conference on Theory and Practice of Digital Libraries 2013 (TPDL 2013), Valetta, Malta, September 26, 2013 (Member of the PC)
• The 6^th International Workshop for Ph.D. Students (PIKM 2013) in conjunction with the International Conference on Information and Knowledge Management (CIKM 2013), San Francisco, CA, USA, November 1, 2013 (Member of the PC)
• The 12^th International Conference on Web-based Learning (ICWL 2013), Kenting, Taiwan, october 6-9, 2014 (Member of the PC)
• The 13^th International Conference on Knowledge Management and Knowledge Technologies (I-Know'13), Graz, Austria, September 4-6, 2013 (Member of the PC)
• The 1^st International Workshop on Scalability in Natural Language Processing (ScaNLP 2013) in conjunction with the International Conference on Recent Advantages on Natural Language Processing (RANLP 2013), Hissar, Bulgaria, September 12-13, 2013 (Member of the PC)
• The 10^th International Workshop on Text-based Information Retrieval (TIR 2013) in conjunction with the 24^rd International Conference on Database and Expert Systems Applications (DEXA 2013), Prague, Czech Republic, August 26-30, 2013 (Member of the PC)
• The 3^rd International Temporal Web Analytics Workshop (TempWeb 2013), in conjunction with the 22^nd World Wide Web Conference (www2013), Rio de Janeiro, Brazil, May 13, 2013 (Workshop Co-Chair)
• The 27^th AAAI Conference (AAAI-13), Bellevue, WA, USA, July 14-18, 2013 (Member of the PC)
• The 2^nd International Temporal Web Analytics Workshop (TempWeb 2012), in conjunction with the 21^st World Wide Web Conference (www2012), Lyon, France, April 17, 2012 (Workshop Co-Chair)
• The 2^nd International Workshop on "Semantic Digital Archives" 2013 (SDA 2013), in conjunction with the 16^th International Conference on Theory and Practice of Digital Libraries 2013 (TPDL 2012), Paphos, Cyprus, September 27, 2012 (Member of the PC)
• The 12^th International Conference on Knowledge Management and Knowledge Technologies (I-Know'12), Graz, Austria, September 5-7, 2012 (Member of the PC)
• The 9^th International Workshop on Text-based Information Retrieval (TIR 2012) in conjunction with the 23^rd International Conference on Database and Expert Systems Applications (DEXA 2012), Vienna, Austria, September 3-7, 2012 (Member of the PC)
• The 11^th International Conference on Web-based Learning (ICWL 2012), Sinaia, Romania, September 2-4, 2012 (Member of the PC)
• The 1^st Joint Conference on Lexical and Computational Semantics (*SEM 2012), Montreal, Canada, June 7-8, 2012 (Member of the PC)
• The 5^th ACM International Conference on Web Search and Data Mining 2012 (WSDM 2012), Seattle, Washington, USA, February 8-12, 2012 (Member of the PC)
• The 10^th International Conference on Web-based Learning (ICWL 2011), Hong Kong SAR, China, December 8-10, 2011 (Member of the PC)
• The 15^th International Conference on Theory and Practice of Digital Libraries 2011 (TPDL 2011), Berlin, Germany, September 25-29, 2011 (Member of the PC)
• The 4^th International Workshop for Ph.D. Students (PIKM 2011) in conjunction with the International Conference on Information and Knowledge Management (CIKM 2011), Glasgow, Scotland, October 28, 2011 (Member of the PC)
• The 1^st International Workshop on "Semantic Digital Archives - sustainable long-term curation perspectives of Cultural Heritage" 2011 (SDA 2011), in conjunction with the 15^th International Conference on Theory and Practice of Digital Libraries 2011 (TPDL 2011), Berlin, Germany, September 29, 2011 (Member of the PC)
• The 1^st International Temporal Web Analytics Workshop (TWAW 2011), in conjunction with the 20^th World Wide Web Conference (www2011), Hyderabad, India, March 28, 2011 (Workshop Co-Chair)
• The 11^th International Conference on Knowledge Management and Knowledge Technologies (I-Know'11), Graz, Austria, September 7-9, 2011 (Member of the PC)
• The 9^th International Conference on Web-based Learning (ICWL 2010), Shanghai, PR China, December 8-10, 2010 (Program Co-Chair)
• The 12^th International Workshop of the Multimedia Metadata Community (SMDT 2010), Saarbrücken, Germany, December 1-3, 2010 (Workshop Co-Chair)
• The 10^th International Web Archiving Workshop (IWAW 2010), Vienna, Austria, September 22-23, 2010 (Workshop Co-Chair)
• The 2^nd ACM International Workshop on Multimedia Technologies for Distance Leaning (MTDL 2010), Florence, Italy, October 29, 2010 (PC Co-Chair)
• The 3^rd IEEE International Conference on Ubi-media Computing (U-Media 2010), Jinhua, PR China, July 5-7, 2010 (Special Session Chair)
• The 4^th Workshop on Information Credibility on the Web (WICOW2010), Raleigh, NC, USA, April, 2010 (Member of the PC)
• The 10^th International Conference on Knowledge Management and Knowledge Technologies (I-Know'10), Graz, Austria, September 1-3, 2010 (Member of the PC)
• The 8^th International Conference on Web-based Learning (ICWL 2009), Aachen, Germany, August 19-21, 2009 (Program Co-Chair)
• The 9^th International Conference on Knowledge Management and Knowledge Technologies (I-Know'09), Graz, Austria, September 2-4, 2009 (Member of the PC)
• The International Workshop on Virtual Worlds for academic, organizational, and life-long learning (ViWo 2009) in conjunction with the 8^th International Conference on Web-based Learning (ICWL 2009), Aachen, Germany, August 19-21, 2009 (Member of the PC)
• The 6^th International Workshop on Text-based Information Retrieval (TIR 2009) in conjunction with the 20^th International Conference on Database and Expert Systems Applications (DEXA 2009), Linz, Austria, August 31 - September 4 (Member of the PC)
• The 2^nd Workshop on Methods and Cases in Computing Education (MCCE 2009), Barcelona, April 22, 2009 (Member of the PC)
• The 9^th IEEE International Conference on Advanced Learning Technologies (ICALT 2009), Riga, Latvia, July 14-18, 2009 (Reviewer)
• The 2^nd International Workshop on Interactive Digital Entertainment Technologies (IDET 2009), Taipei, Taiwan, December 3-5, 2009 (Publicity Co-Chair)
• The 9^th Workshop on Multimedia Metadata (WMM'09) in conjunction with COmpression et REprésentation des Signaux Audiovisuels (CORESA'09), Toulouse, France, March 19-20 (Member of the PC)
• The International Workshop on Virtual Worlds for academic, organizational, and life-long learning (ViWo 2009) in conjunction with IMCL 2009 in Amman, Jordan, April 22-24, 2009 (Member of the PC)
• Conference EC-TEL'08 1^st Workshop on Story-Telling for Educational Gaming (STEG 2008), Maastricht, The Netherlands, September 16, 2008 (Co-Organizer and Member of the PC)
• Conference EC-TEL'08 Workshop on Social Information Retrieval for Technology-Enhanced Learning (SIRTEL 2008), Maastricht, The Netherlands, September 17-19, 2008 (Member of the PC)
• Conference I-Media'08 at Triple-I'08 Special Track on Knowledge Acquisition from the Social Web (KASW '08), Graz, Austria, September 3-5, 2008 (Member of the PC)
• Conference I-Media'08 at Triple-I'08 Special Track on Cross-Platform Aspects of the Social Web (CPASW '08), Graz, Austria, September 3-5, 2008 (Member of the PC)
• Conference I-Know'08 at Triple-I'08  Special Track on Knowledge Visualization and Knowledge Relationship Discovery (KVD'08), Graz, Austria, September 3-5, 2008 (Member of the PC)
• The 8^th MPEG-7/21 Community Workshop on Multimedia Metadata Management & Retrieval (M3R 08), Klagenfurt, Austria, May 7-8, 2008 (Member of the PC)
• The IADIS International Conference on Web Based Communities 2007, Amsterdam, The Netherlands, July 24-26, 2007 (Member of the PC)
• International Workshop on Interactive Digital Entertainment Technologies (IDET 2008), Lanzhou, China, July 15-16, 2008 (Publicity Co-Chair & Member of the PC)
• The International Conference on Technology, Communication and Education i-TCE 2008, Kuwait, April 7-9, 2008 (Member of the PC)
• The 7^th International Conference on Web-based Learning (ICWL 2008), Jinhua, China, August 20-22, 2008 (Publicity Co-Chair & Member of the PC)
• Conference ECSCW 2007 Workshop on "What is missing in Social Software? Current collaborative practices in social software", Limerick, Ireland, September 24-28, 2007 (Member of the PC)
• Conference EC-TEL'07 Workshop on Social Information Retrieval for Technology-Enhanced Learning (SIRTEL 2007), Crete, Greece, September 17-20, 2007 (Member of the PC)
• The 2^nd European Conference on Technology Enhanced Learning EC-TEL'07, Crete, Greece, September 17-20, 2007 (Member of the PC)
• Conference I-Media'07 Workshop on Multimedia Metadata Applications (M3A), Graz, Austria, September 5-7, 2007 (Member of the PC)
• Conference I-Know'07 Special Track on Knowledge Organization and Semantic Technologies (KOST'06), Graz, Austria, September 5-7, 2007 (Member of the PC)
• The 6^th International Conference on Web-based Learning (ICWL 2007), Edinburgh, Scotland, August 15-17, 2007 (Publicity Co-Chair & Member of the PC)
• The 6^th MPEG-7/21 Community Workshop The Role of Metadata, Aachen, Germany, March 5-6, 2007 (Member of the PC)
• The IADIS International Conference on Web Based Communities 2007, Salamanca, Spain, February 18-20, 2007 (Member of the PC)
• 5^th UNESCO/ICOMOS Expert Working Group for the Preservation of the Bamiyan Site, Aachen Germany, December 14-16, 2006 (Associated Organizer)
• The 2^nd International Symposium in Media Informatics: "Cow paths: Agency in Social Software", B-IT, Bonn, Germany, November 16-17, 2006 (Co-Organizer)
• JUKM Special Issue of the Multimedia Metadata Community (Member of the PC)
• The 5^th International Conference on Web-based Learning (ICWL 2006), Penang, Malaysia, July 19-21, 2006 (Member of the PC)
• Conference I-Know'06 Special Track on Advanced Semantic Technologies (AST'06), Graz, Austria, September 6-8, 2006 (Member of the PC)
• Conference I-Know'06 Workshop of the Multimedia Metadata Community (MMC'06), Graz, Austria, September 6-8, 2006 (Member of the PC)
• Workshop on “Information Systems for Science, Cultural Heritage Management & e-Government in Afghanistan”, Aachen, Germany, 2006 (Co-Organizer & Member of the PC)
• The 3^rd MPEG-7/21 Community Workshop Test Sets for Multimedia Interoperability & Application Scenarios, Aachen, Germany, November 24-25, 2005 (Co-Organizer & Member of the PC)
• Conference I-KNOW '05 Special Track on Knowledge Discovery and Semantic Technologies (KDaST'05), Graz, Austria, June 28-30, 2005 (Member of the PC)
• Symposium Die Listen der Evidenz, Cologne, Germany, February 4-5, 2004 (Co-Organizer & Member of the PC)
• Conference "Advances in Web-based Learning" (ICWL 2003), Melbourne, Australia, August 18-20, 2003 (Member of the PC)