Kjetil Nørvåg
Om
Kjetil Nørvåg is a professor at the Department of Computer and Information Science at NTNU. He is affiliated with the Data and artificial intelligence group, where his main research interests include distributed and parallel database systems, query processing, information retrieval, and Big Data in general.
He has been involved in teaching on a wide range of topics, including Data mining, Big Data architecture, Advanced databases, Information retrieval, Distributed systems, Data modelling and database systems, Operating systems, Algorithms and data structures, Computer architecture, and Computer systems.
Nørvåg has been involved in a number of projects during recent years, including:
- Norwegian Center for Research-based AI Innovation (NorwAI), 26M Euro (Centre for Research-based Innovation, funding from NTNU, Norwegian Research Council, and industry partners), 2020-2028.
- Big Data & Machine Learning, 0.5M Euro per year (funded by DNB), 2018-2023.
- Trondheim Analytica (NTNU Digital Transformation program), 2018-2022.
- ExiBiDa: Exploring new dimensions in Big Data, funding one PhD student and one postdoc, approx. 1M Euro (Norwegian Research Council), 2015-2019.
- CoupledDB: High-Performance Indexing for Emerging GPU-Coupled Databases, 208K Euro (EU H2020-MSCA), 2017-2019.
- MUSED: Multi-Source Event Detection, 7M NOK (NTNU funded), 2017-2021.
- CloudIX: Cloud-based Indexing and Query Processing, 212K Euro (EU FP7 with partial funding from the Norwegian Research Council), 2011-2013.
- COMIDOR: Cooperative Mining of Independent Document Repositories, funding two PhD students and two postdocs, approx. 1.1M Euro (Norwegian Research Council), 2008-2013.
- DASCOSA: Database Support for Computational Science Applications,, funding one PhD student and one postdoc, approx. 400K Euro (Norwegian Research Council), 2007-2012.
- LongRec: Records Management over Decades (Consortium led by DNV), approx. 2.1M Euro (partially funded by the Norwegian Research Council), 2007-2011.
Nørvåg has published close to 200 publications. For a complete list, including links to preprints of the papers, please check out his CV
Publikasjoner
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
Vitenskapelige artikler
-
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
-
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
-
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
-
Gkorgkas, Orestis;
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2017)
Exploratory product search using top-k join queries.
Information Systems.
volum 64 (March).
Vitenskapelig 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
-
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
-
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
-
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;
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
-
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
Tidsskriftspublikasjoner
-
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2014)
A survey of large-scale analytical query processing in MapReduce.
The VLDB journal.
volum 23 (3).
Vitenskapelig oversiktsartikkel/review
Bøker
-
Kanhabua, Nattiya;
Blanco, Roi;
Nørvåg, Kjetil.
(2015)
Temporal Information Retrieval.
Now Publishers Inc.. 2015. ISBN 978-1-68083-032-3.
Vitenskapelig monografi
Del av bok/rapport
-
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
-
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.
(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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
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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
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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
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Kotidis, Yannis;
Nørvåg, Kjetil.
(2010)
Reverse Top-k Queries.
26th International Conference on Data Engineering. Conference Proceedings.
Vitenskapelig kapittel/artikkel
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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
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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
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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
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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
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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