2021

• Dam, Thu-Lan; Chester, Sean; Nørvåg, Kjetil; Duong, Quang-Huy. (2021) Efficient top-k recently-frequent term querying over spatio-temporal textual streams. Information Systems. volum 97.
  Vitenskapelig artikkel
• Duong, Quang-Huy; Ramampiaro, Heri; Nørvåg, Kjetil; Dam, Thu-Lan. (2021) Density Guarantee on Finding Multiple Subgraphs and Subtensors. ACM Transactions on Knowledge Discovery from Data. volum 15 (5).
  Vitenskapelig artikkel

2020

• Duong, Quang-Huy; Ramampiaro, Heri; Nørvåg, Kjetil. (2020) Multiple Dense Subtensor Estimation with High Density Guarantee. 2020 IEEE 36th International Conference on Data Engineering (ICDE).
  Vitenskapelig kapittel/artikkel
• Maropaki, Stella; Chester, Sean; Doulkeridis, Christos; Nørvåg, Kjetil. (2020) Diversifying Top-k Point-of-Interest Queries via Collective Social Reach. CIKM 20 : The 29th ACM international conference on information and knowledge management : Virtual Event Ireland, October 19-23, 2020..
  Vitenskapelig kapittel/artikkel

2019

• Djenouri, Youcef; Lin, Chun Wei; Nørvåg, Kjetil; Ramampiaro, Heri. (2019) Highly Efficient Pattern Mining Based on Transaction Decomposition. 35th IEEE International Conference on Data Engineering, ICDE 2019, Macao, China, April 8-11, 2019.
  Vitenskapelig kapittel/artikkel
• Duong, Quang-Huy; Ramampiaro, Heri; Nørvåg, Kjetil. (2019) Sketching Streaming Histogram Elements using Multiple Weighted Factors. CIKM '19: Proceedings of the 28th ACM International Conference on Information and Knowledge Management.
  Vitenskapelig kapittel/artikkel
• Özdikis, Özer; Ramampiaro, Heri; Nørvåg, Kjetil. (2019) Locality-adapted kernel densities of term co-occurrences for location prediction of tweets. Information Processing & Management. volum 56 (4).
  Vitenskapelig artikkel
• Trattner, Christoph; Kusmierczyk, Tomasz; Nørvåg, Kjetil. (2019) Investigating and predicting online food recipe upload behavior. Information Processing & Management. volum 56 (3).
  Vitenskapelig artikkel

2018

• Duong, Quang-Huy; Ramampiaro, Heri; Nørvåg, Kjetil. (2018) Applying temporal dependence to detect changes in streaming data. Applied intelligence (Boston). volum 48 (12).
  Vitenskapelig artikkel
• Duong, Quang-Huy; Ramampiaro, Heri; Nørvåg, Kjetil; Fournier-Viger, Philippe; Dam, Thu-Lan. (2018) High utility drift detection in quantitative data streams. Knowledge-Based Systems. volum 157.
  Vitenskapelig artikkel
• Kusmierczyk, Tomasz; Nørvåg, Kjetil. (2018) On Validation and Predictability of Digital Badges’ Influence on Individual Users. Proceedings of the AAAI Conference on Artificial Intelligence.
  Vitenskapelig artikkel
• Özdikis, Özer; Ramampiaro, Heri; Nørvåg, Kjetil. (2018) Locality-adapted Kernel Densities for Tweet Localization. Proceedings of the 41st International ACM SIGIR Conference on Research & Development in Information Retrieval.
  Vitenskapelig kapittel/artikkel

2017

• Benetka, Jan; Balog, Krisztian; Nørvåg, Kjetil. (2017) Anticipating Information Needs Based on Check-in Activity. Proceedings of the Tenth ACM International Conference on Web Search and Data Mining, WSDM 2017, Cambridge, United Kingdom, February 6-10, 2017.
  Vitenskapelig kapittel/artikkel
• Gkorgkas, Orestis; Vlachou, Akrivi; Doulkeridis, Christos; Nørvåg, Kjetil. (2017) Exploratory product search using top-k join queries. Information Systems. volum 64 (March).
  Vitenskapelig artikkel

2016

• Chester, Sean; Gkorgkas, Orestis; Nørvåg, Kjetil. (2016) Top-k Dominating Queries, in Parallel, in Memory. Evaggelia Pitoura, Sofian Maabout, Georgia Koutrika, Amélie Marian, Letizia Tanca, Ioana Manolescu, Kostas Stefanidis: Proceedings of the 19th International Conference on Extending Database Technology, EDBT 2016, Bordeaux, France, March 15-16, 2016, Bordeaux, France, March 15-16, 2016.
  Vitenskapelig kapittel/artikkel
• Kusmierczyk, Tomasz; Nørvåg, Kjetil. (2016) Online Food Recipe Title Semantics: Combining Nutrient Facts and Topics. Proceedings of the 25th ACM International on Conference on Information and Knowledge Management.
  Vitenskapelig kapittel/artikkel
• Saouk, Mei; Doulkeridis, Christos; Vlachou, Akrivi; Nørvåg, Kjetil. (2016) Efficient processing of top-k joins in MapReduce. Proceedings 2016 IEEE International Conference on Big Data.
  Vitenskapelig kapittel/artikkel

2015

• Kusmierczyk, Tomasz; Trattner, Christoph; Nørvåg, Kjetil. (2015) Temporality in Online Food Recipe Consumption and Production. Aldo Gangemi, Stefano Leonardi, Alessandro Panconesi: Proceedings of the 24th International Conference on World Wide Web Companion, WWW 2015, Florence, Italy, May 18-22, 2015 - Companion Volume.
  Annet
• Larrain, Santiago; Trattner, Christoph; Parra, Denis; Graells-Garrido, Eduardo; Nørvåg, Kjetil. (2015) Good Times Bad Times: A Study on Recency Effects in Collaborative Filtering for Social Tagging. Proceedings of the 9th ACM Conference on Recommender Systems, RecSys 2015, Vienna, Austria, September 16-20, 2015.
  Annet
• Gkorgkas, Orestis; Vlachou, Akrivi; Doulkeridis, Christos; Nørvåg, Kjetil. (2015) Finding the Most Diverse Products using Preference Queries. Advances in Database Technology - EDBT 2015, 18th International Conference on Extending Database Technology, Brussels, Belgium, March 23-27, Proceedings.
  Vitenskapelig kapittel/artikkel
• Kanhabua, Nattiya; Blanco, Roi; Nørvåg, Kjetil. (2015) Temporal Information Retrieval. Now Publishers Inc.. 2015. ISBN 978-1-68083-032-3.
  Vitenskapelig monografi

2014

• Doulkeridis, Christos; Nørvåg, Kjetil. (2014) A survey of large-scale analytical query processing in MapReduce. The VLDB journal. volum 23 (3).
  Vitenskapelig oversiktsartikkel/review
• Kotsakos, Dimitrios; Lappas, Theodoros; Kotzias, Dimitrios; Gunopulos, Dimitrios; Kanhabua, Nattiya; Nørvåg, Kjetil. (2014) A burstiness-aware approach for document dating. The 37th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR '14, Gold Coast , QLD, Australia - July 06 - 11, 2014.
  Vitenskapelig kapittel/artikkel

2013

• Ciglan, Marek; Laclavik, Michal; Nørvåg, Kjetil. (2013) On community detection in real-world networks and the importance of degree assortativity. The 19th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, KDD 2013, Chicago, IL, USA, August 11-14, 2013.
  Vitenskapelig kapittel/artikkel
• Vlachou, Akrivi; Doulkeridis, Christos; Nørvåg, Kjetil; Kotidis, Yannis. (2013) Branch-and-bound algorithm for reverse top-k queries. Proceedings of the ACM SIGMOD International Conference on Management of Data, SIGMOD 2013, New York, NY, USA, June 22-27, 2013.
  Vitenskapelig kapittel/artikkel

2012

• Ciglan, Marek; Nørvåg, Kjetil; Hluchy, Ladislav. (2012) The SemSets model for ad-hoc semantic list search. Proceedings of the 21st World Wide Web Conference 2012, WWW 2012, Lyon, France, April 16-20, 2012.
  Vitenskapelig kapittel/artikkel
• Doulkeridis, Christos; Vlachou, Akrivi; Nørvåg, Kjetil; Kotidis, Yannis; Polyzotis, Neoklis. (2012) Processing of Rank Joins in Highly Distributed Systems. Proceedings - International Conference on Data Engineering.
  Vitenskapelig artikkel
• Rocha-Junior, Joao B.; Nørvåg, Kjetil. (2012) Top-k spatial keyword queries on road networks. 15th International Conference on Extending Database Technology, EDBT '12, Berlin, Germany, March 27-30, 2012, Proceedings.
  Vitenskapelig kapittel/artikkel
• Vlachou, Akrivi; Doulkeridis, Christos; Nørvåg, Kjetil. (2012) Distributed top-k query processing by exploiting skyline summaries. Distributed and parallel databases. volum 30 (3-4).
  Vitenskapelig artikkel

2011

• Rocha-Junior, Joao B.; Vlachou, Akrivi; Doulkeridis, Christos; Nørvåg, Kjetil. (2011) Efficient Execution Plans for Distributed Skyline Query Processing. EDBT/ICDT 2011 Joint Conference.
  Vitenskapelig kapittel/artikkel
• Vlachou, Akrivi; Doulkeridis, Christos; Kotidis, Yannis; Nørvåg, Kjetil. (2011) Monochromatic and Bichromatic Reverse Top-k Queries. IEEE Transactions on Knowledge and Data Engineering. volum 23 (8).
  Vitenskapelig artikkel

2010

• Ciglan, Marek; Nørvåg, Kjetil. (2010) WikiPop: personalized event detection system based on Wikipedia page view statistics. Proceedings of the 19th ACM international conference on Information and knowledge management.
  Vitenskapelig kapittel/artikkel
• Doulkeridis, Christos; Vlachou, Akrivi; Nørvåg, Kjetil; Kotidis, Yannis; Vazirgiannis, Michalis. (2010) On the selectivity of multidimensional routing indices. Proceedings of the 19th ACM international conference on Information and knowledge management.
  Vitenskapelig kapittel/artikkel
• Hauglid, Jon Olav; Ryeng, Norvald Hegelstad; Nørvåg, Kjetil. (2010) DYFRAM: dynamic fragmentation and replica management in distributed database systems. Distributed and parallel databases. volum 28 (2-3).
  Vitenskapelig artikkel
• Rocha-Junior, Joao B.; Vlachou, Akrivi; Doulkeridis, Christos; Nørvåg, Kjetil. (2010) Efficient Processing of Top-k Spatial Preference Queries. Proceedings of the VLDB Endowment. volum 4 (2).
  Vitenskapelig artikkel
• Vlachou, Akrivi; Doulkeridis, Christos; Kotidis, Yannis; Nørvåg, Kjetil. (2010) Reverse Top-k Queries. 26th International Conference on Data Engineering. Conference Proceedings.
  Vitenskapelig kapittel/artikkel
• Vlachou, Akrivi; Doulkeridis, Christos; Nørvåg, Kjetil; Kotidis, Yannis. (2010) Identifying the Most Influential Data Objects with Reverse Top-k Queries. Proceedings of the VLDB Endowment. volum 3 (1).
  Vitenskapelig artikkel
• Zhang, Xiangliang; Wang, Wei; Nørvåg, Kjetil; Sebag, Michele. (2010) K-AP: Generating Specified K Clusters by Efficient Affinity Propagation. 10th IEEE International Conference on Data Mining, Proceedings.
  Vitenskapelig kapittel/artikkel

2009

• Doulkeridis, Christos; Vlachou, Akrivi; Nørvåg, Kjetil; Kotidis, Yannis; Vazirgiannis, Michalis. (2009) Multidimensional Routing Indices for Efficient Distributed Query Processing. Proceedings of 18th ACM Conference on Information and Knowledge Management (CIKM'09).
  Vitenskapelig kapittel/artikkel
• Hauglid, Jon Olav; Nørvåg, Kjetil; Ryeng, Norvald Hegelstad. (2009) Efficient and Robust Database Support for Data-Intensive Applications in Dynamic Environments. Proceedings of the 25th IEEE International Conference on Data Engineering (ICDE 2009).
  Vitenskapelig kapittel/artikkel

2008

• Vlachou, Akrivi; Doulkeridis, Christos; Nørvåg, Kjetil; Vazirgiannis, Michalis. (2008) Skyline-based Peer-to-Peer Top-k Query Processing. Proceedings of the 2008 IEEE 24th International Conference on Data Engineering.
  Vitenskapelig kapittel/artikkel
• Hauglid, Jon Olav; Nørvåg, Kjetil. (2008) PROQID: Partial Restarts of Queries in Distributed Databases. Proceedings of ACM 17th Conference on Information and Knowledge Management (CIKM 08).
  Vitenskapelig kapittel/artikkel
• Vlachou, Akrivi; Doulkeiridis, Christos; Nørvåg, Kjetil; Vazirgiannis, Michalis. (2008) On efficient top-k query processing in highly distributed environments. Proceedings of the ACM SIGMOD International Conference on Management of Data, SIGMOD 2008, Vancouver, BC, Canada.
  Vitenskapelig kapittel/artikkel

2007

• Doulkeridis, Christos; Nørvåg, Kjetil; Vazirgiannis, Michalis. (2007) DESENT: decentralized and distributed semantic overlay generation in P2P networks. IEEE Journal on Selected Areas in Communications. volum 25 (1).
  Vitenskapelig artikkel