Kjetil Nørvåg
About
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
Publications
2024
-
Shadrooh, Shiva;
Nørvåg, Kjetil.
(2024)
SMoTeF: Smurf money laundering detection using temporal order and flow analysis.
Applied intelligence (Boston)
Academic article
2023
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Rocha-Junior, Joao B.;
Nørvåg, Kjetil.
(2023)
Decisive skyline queries for truly balancing multiple criteria.
Data & Knowledge Engineering
Academic article
-
Theodoropoulos, George S.;
Nørvåg, Kjetil;
Doulkeridis, Christos.
(2023)
Efficient Semantic Similarity Search over Spatio-textual Data.
OpenProceedings
Academic chapter/article/Conference paper
2021
-
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
Academic article
-
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
Academic article
2020
-
Duong, Quang-Huy;
Ramampiaro, Heri;
Nørvåg, Kjetil.
(2020)
Multiple Dense Subtensor Estimation with High Density Guarantee.
IEEE Press
Academic chapter/article/Conference paper
-
Maropaki, Stella;
Chester, Sean;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2020)
Diversifying Top-k Point-of-Interest Queries via Collective Social Reach.
ACM Publications
Academic chapter/article/Conference paper
2019
-
Trattner, Christoph;
Kusmierczyk, Tomasz;
Nørvåg, Kjetil.
(2019)
Investigating and predicting online food recipe upload behavior.
Information Processing & Management
Academic article
-
Özdikis, Özer;
Ramampiaro, Heri;
Nørvåg, Kjetil.
(2019)
Locality-adapted kernel densities of term co-occurrences for location prediction of tweets.
Information Processing & Management
Academic article
-
Duong, Quang-Huy;
Ramampiaro, Heri;
Nørvåg, Kjetil.
(2019)
Sketching Streaming Histogram Elements using Multiple Weighted Factors.
ACM Publications
Academic chapter/article/Conference paper
-
Djenouri, Youcef;
Lin, Chun Wei;
Nørvåg, Kjetil;
Ramampiaro, Heri.
(2019)
Highly Efficient Pattern Mining Based on Transaction Decomposition.
IEEE Press
Academic chapter/article/Conference paper
2018
-
Kusmierczyk, Tomasz;
Nørvåg, Kjetil.
(2018)
On Validation and Predictability of Digital Badges’ Influence on Individual Users.
Proceedings of the AAAI Conference on Artificial Intelligence
Academic article
-
Duong, Quang-Huy;
Ramampiaro, Heri;
Nørvåg, Kjetil.
(2018)
Applying temporal dependence to detect changes in streaming data.
Applied intelligence (Boston)
Academic article
-
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
Academic article
-
Özdikis, Özer;
Ramampiaro, Heri;
Nørvåg, Kjetil.
(2018)
Locality-adapted Kernel Densities for Tweet Localization.
ACM Publications
Academic chapter/article/Conference paper
2017
-
Benetka, Jan;
Balog, Krisztian;
Nørvåg, Kjetil.
(2017)
Anticipating Information Needs Based on Check-in Activity.
ACM Publications
Academic chapter/article/Conference paper
-
Gkorgkas, Orestis;
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2017)
Exploratory product search using top-k join queries.
Information Systems
Academic article
2016
-
Kusmierczyk, Tomasz;
Nørvåg, Kjetil.
(2016)
Online Food Recipe Title Semantics: Combining Nutrient Facts and Topics.
ACM Publications
Academic chapter/article/Conference paper
-
Saouk, Mei;
Doulkeridis, Christos;
Vlachou, Akrivi;
Nørvåg, Kjetil.
(2016)
Efficient processing of top-k joins in MapReduce.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Chester, Sean;
Gkorgkas, Orestis;
Nørvåg, Kjetil.
(2016)
Top-k Dominating Queries, in Parallel, in Memory.
OpenProceedings
Academic chapter/article/Conference paper
2015
-
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.
ACM Publications
Other
-
Kanhabua, Nattiya;
Blanco, Roi;
Nørvåg, Kjetil.
(2015)
Temporal Information Retrieval.
Now Publishers Inc.
Now Publishers Inc.
Academic monograph
-
Kusmierczyk, Tomasz;
Trattner, Christoph;
Nørvåg, Kjetil.
(2015)
Temporality in Online Food Recipe Consumption and Production.
ACM Publications
Other
-
Gkorgkas, Orestis;
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2015)
Finding the Most Diverse Products using Preference
Queries.
OpenProceedings
Academic chapter/article/Conference paper
2014
-
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2014)
A survey of large-scale analytical query processing in MapReduce.
The VLDB journal
Academic literature review
-
Kotsakos, Dimitrios;
Lappas, Theodoros;
Kotzias, Dimitrios;
Gunopulos, Dimitrios;
Kanhabua, Nattiya;
Nørvåg, Kjetil.
(2014)
A burstiness-aware approach for document dating.
ACM Publications
Academic chapter/article/Conference paper
2013
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil;
Kotidis, Yannis.
(2013)
Branch-and-bound algorithm for reverse top-k queries.
ACM Publications
Academic chapter/article/Conference paper
-
Ciglan, Marek;
Laclavik, Michal;
Nørvåg, Kjetil.
(2013)
On community detection in real-world networks and the importance of degree assortativity.
ACM Publications
Academic chapter/article/Conference paper
2012
-
Rocha-Junior, Joao B.;
Nørvåg, Kjetil.
(2012)
Top-k spatial keyword queries on road networks.
ACM Publications
Academic chapter/article/Conference paper
-
Ciglan, Marek;
Nørvåg, Kjetil;
Hluchy, Ladislav.
(2012)
The SemSets model for ad-hoc semantic list search.
ACM Publications
Academic chapter/article/Conference paper
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2012)
Distributed top-k query processing by exploiting skyline summaries.
Distributed and parallel databases
Academic article
2011
-
Rocha-Junior, Joao B.;
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2011)
Efficient Execution Plans for Distributed Skyline Query Processing.
ACM Publications
Academic chapter/article/Conference paper
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Kotidis, Yannis;
Nørvåg, Kjetil.
(2011)
Monochromatic and Bichromatic Reverse Top-k Queries.
IEEE Transactions on Knowledge and Data Engineering
Academic article
2010
-
Zhang, Xiangliang;
Wang, Wei;
Nørvåg, Kjetil;
Sebag, Michele.
(2010)
K-AP: Generating Specified K Clusters by Efficient Affinity Propagation.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Hauglid, Jon Olav;
Ryeng, Norvald Hegelstad;
Nørvåg, Kjetil.
(2010)
DYFRAM: dynamic fragmentation and replica management in distributed database systems.
Distributed and parallel databases
Academic article
-
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
Academic article
-
Ciglan, Marek;
Nørvåg, Kjetil.
(2010)
WikiPop: personalized event detection system based on Wikipedia page view statistics.
ACM Publications
Academic chapter/article/Conference paper
-
Doulkeridis, Christos;
Vlachou, Akrivi;
Nørvåg, Kjetil;
Kotidis, Yannis;
Vazirgiannis, Michalis.
(2010)
On the selectivity of multidimensional routing indices.
ACM Publications
Academic chapter/article/Conference paper
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Kotidis, Yannis;
Nørvåg, Kjetil.
(2010)
Reverse Top-k Queries.
IEEE Press
Academic chapter/article/Conference paper
-
Rocha-Junior, Joao B.;
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2010)
Efficient Processing of Top-k Spatial Preference Queries.
Proceedings of the VLDB Endowment
Academic article
2009
-
Doulkeridis, Christos;
Vlachou, Akrivi;
Nørvåg, Kjetil;
Kotidis, Yannis;
Vazirgiannis, Michalis.
(2009)
Multidimensional Routing Indices for Efficient Distributed Query Processing.
Association for Computing Machinery (ACM)
Academic chapter/article/Conference paper
-
Hauglid, Jon Olav;
Nørvåg, Kjetil;
Ryeng, Norvald Hegelstad.
(2009)
Efficient and Robust Database Support for Data-Intensive Applications in Dynamic Environments.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
2008
-
Vlachou, Akrivi;
Doulkeiridis, Christos;
Nørvåg, Kjetil;
Vazirgiannis, Michalis.
(2008)
On efficient top-k query processing in highly distributed environments.
ACM Publications
Academic chapter/article/Conference paper
-
Hauglid, Jon Olav;
Nørvåg, Kjetil.
(2008)
PROQID: Partial Restarts of Queries in Distributed Databases.
Association for Computing Machinery (ACM)
Academic chapter/article/Conference paper
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil;
Vazirgiannis, Michalis.
(2008)
Skyline-based Peer-to-Peer Top-k Query Processing.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
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
Academic article
Journal publications
-
Shadrooh, Shiva;
Nørvåg, Kjetil.
(2024)
SMoTeF: Smurf money laundering detection using temporal order and flow analysis.
Applied intelligence (Boston)
Academic article
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Rocha-Junior, Joao B.;
Nørvåg, Kjetil.
(2023)
Decisive skyline queries for truly balancing multiple criteria.
Data & Knowledge Engineering
Academic article
-
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
Academic article
-
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
Academic article
-
Trattner, Christoph;
Kusmierczyk, Tomasz;
Nørvåg, Kjetil.
(2019)
Investigating and predicting online food recipe upload behavior.
Information Processing & Management
Academic article
-
Özdikis, Özer;
Ramampiaro, Heri;
Nørvåg, Kjetil.
(2019)
Locality-adapted kernel densities of term co-occurrences for location prediction of tweets.
Information Processing & Management
Academic article
-
Kusmierczyk, Tomasz;
Nørvåg, Kjetil.
(2018)
On Validation and Predictability of Digital Badges’ Influence on Individual Users.
Proceedings of the AAAI Conference on Artificial Intelligence
Academic article
-
Duong, Quang-Huy;
Ramampiaro, Heri;
Nørvåg, Kjetil.
(2018)
Applying temporal dependence to detect changes in streaming data.
Applied intelligence (Boston)
Academic article
-
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
Academic article
-
Gkorgkas, Orestis;
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2017)
Exploratory product search using top-k join queries.
Information Systems
Academic article
-
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2014)
A survey of large-scale analytical query processing in MapReduce.
The VLDB journal
Academic literature review
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2012)
Distributed top-k query processing by exploiting skyline summaries.
Distributed and parallel databases
Academic article
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Kotidis, Yannis;
Nørvåg, Kjetil.
(2011)
Monochromatic and Bichromatic Reverse Top-k Queries.
IEEE Transactions on Knowledge and Data Engineering
Academic article
-
Hauglid, Jon Olav;
Ryeng, Norvald Hegelstad;
Nørvåg, Kjetil.
(2010)
DYFRAM: dynamic fragmentation and replica management in distributed database systems.
Distributed and parallel databases
Academic article
-
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
Academic article
-
Rocha-Junior, Joao B.;
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2010)
Efficient Processing of Top-k Spatial Preference Queries.
Proceedings of the VLDB Endowment
Academic article
-
Doulkeridis, Christos;
Nørvåg, Kjetil;
Vazirgiannis, Michalis.
(2007)
DESENT: decentralized and distributed semantic overlay generation in P2P networks.
IEEE Journal on Selected Areas in Communications
Academic article
Books
-
Kanhabua, Nattiya;
Blanco, Roi;
Nørvåg, Kjetil.
(2015)
Temporal Information Retrieval.
Now Publishers Inc.
Now Publishers Inc.
Academic monograph
Part of book/report
-
Theodoropoulos, George S.;
Nørvåg, Kjetil;
Doulkeridis, Christos.
(2023)
Efficient Semantic Similarity Search over Spatio-textual Data.
OpenProceedings
Academic chapter/article/Conference paper
-
Duong, Quang-Huy;
Ramampiaro, Heri;
Nørvåg, Kjetil.
(2020)
Multiple Dense Subtensor Estimation with High Density Guarantee.
IEEE Press
Academic chapter/article/Conference paper
-
Maropaki, Stella;
Chester, Sean;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2020)
Diversifying Top-k Point-of-Interest Queries via Collective Social Reach.
ACM Publications
Academic chapter/article/Conference paper
-
Duong, Quang-Huy;
Ramampiaro, Heri;
Nørvåg, Kjetil.
(2019)
Sketching Streaming Histogram Elements using Multiple Weighted Factors.
ACM Publications
Academic chapter/article/Conference paper
-
Djenouri, Youcef;
Lin, Chun Wei;
Nørvåg, Kjetil;
Ramampiaro, Heri.
(2019)
Highly Efficient Pattern Mining Based on Transaction Decomposition.
IEEE Press
Academic chapter/article/Conference paper
-
Özdikis, Özer;
Ramampiaro, Heri;
Nørvåg, Kjetil.
(2018)
Locality-adapted Kernel Densities for Tweet Localization.
ACM Publications
Academic chapter/article/Conference paper
-
Benetka, Jan;
Balog, Krisztian;
Nørvåg, Kjetil.
(2017)
Anticipating Information Needs Based on Check-in Activity.
ACM Publications
Academic chapter/article/Conference paper
-
Kusmierczyk, Tomasz;
Nørvåg, Kjetil.
(2016)
Online Food Recipe Title Semantics: Combining Nutrient Facts and Topics.
ACM Publications
Academic chapter/article/Conference paper
-
Saouk, Mei;
Doulkeridis, Christos;
Vlachou, Akrivi;
Nørvåg, Kjetil.
(2016)
Efficient processing of top-k joins in MapReduce.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Chester, Sean;
Gkorgkas, Orestis;
Nørvåg, Kjetil.
(2016)
Top-k Dominating Queries, in Parallel, in Memory.
OpenProceedings
Academic chapter/article/Conference paper
-
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.
ACM Publications
Other
-
Kusmierczyk, Tomasz;
Trattner, Christoph;
Nørvåg, Kjetil.
(2015)
Temporality in Online Food Recipe Consumption and Production.
ACM Publications
Other
-
Gkorgkas, Orestis;
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2015)
Finding the Most Diverse Products using Preference
Queries.
OpenProceedings
Academic chapter/article/Conference paper
-
Kotsakos, Dimitrios;
Lappas, Theodoros;
Kotzias, Dimitrios;
Gunopulos, Dimitrios;
Kanhabua, Nattiya;
Nørvåg, Kjetil.
(2014)
A burstiness-aware approach for document dating.
ACM Publications
Academic chapter/article/Conference paper
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil;
Kotidis, Yannis.
(2013)
Branch-and-bound algorithm for reverse top-k queries.
ACM Publications
Academic chapter/article/Conference paper
-
Ciglan, Marek;
Laclavik, Michal;
Nørvåg, Kjetil.
(2013)
On community detection in real-world networks and the importance of degree assortativity.
ACM Publications
Academic chapter/article/Conference paper
-
Rocha-Junior, Joao B.;
Nørvåg, Kjetil.
(2012)
Top-k spatial keyword queries on road networks.
ACM Publications
Academic chapter/article/Conference paper
-
Ciglan, Marek;
Nørvåg, Kjetil;
Hluchy, Ladislav.
(2012)
The SemSets model for ad-hoc semantic list search.
ACM Publications
Academic chapter/article/Conference paper
-
Rocha-Junior, Joao B.;
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil.
(2011)
Efficient Execution Plans for Distributed Skyline Query Processing.
ACM Publications
Academic chapter/article/Conference paper
-
Zhang, Xiangliang;
Wang, Wei;
Nørvåg, Kjetil;
Sebag, Michele.
(2010)
K-AP: Generating Specified K Clusters by Efficient Affinity Propagation.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Ciglan, Marek;
Nørvåg, Kjetil.
(2010)
WikiPop: personalized event detection system based on Wikipedia page view statistics.
ACM Publications
Academic chapter/article/Conference paper
-
Doulkeridis, Christos;
Vlachou, Akrivi;
Nørvåg, Kjetil;
Kotidis, Yannis;
Vazirgiannis, Michalis.
(2010)
On the selectivity of multidimensional routing indices.
ACM Publications
Academic chapter/article/Conference paper
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Kotidis, Yannis;
Nørvåg, Kjetil.
(2010)
Reverse Top-k Queries.
IEEE Press
Academic chapter/article/Conference paper
-
Doulkeridis, Christos;
Vlachou, Akrivi;
Nørvåg, Kjetil;
Kotidis, Yannis;
Vazirgiannis, Michalis.
(2009)
Multidimensional Routing Indices for Efficient Distributed Query Processing.
Association for Computing Machinery (ACM)
Academic chapter/article/Conference paper
-
Hauglid, Jon Olav;
Nørvåg, Kjetil;
Ryeng, Norvald Hegelstad.
(2009)
Efficient and Robust Database Support for Data-Intensive Applications in Dynamic Environments.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Vlachou, Akrivi;
Doulkeiridis, Christos;
Nørvåg, Kjetil;
Vazirgiannis, Michalis.
(2008)
On efficient top-k query processing in highly distributed environments.
ACM Publications
Academic chapter/article/Conference paper
-
Hauglid, Jon Olav;
Nørvåg, Kjetil.
(2008)
PROQID: Partial Restarts of Queries in Distributed Databases.
Association for Computing Machinery (ACM)
Academic chapter/article/Conference paper
-
Vlachou, Akrivi;
Doulkeridis, Christos;
Nørvåg, Kjetil;
Vazirgiannis, Michalis.
(2008)
Skyline-based Peer-to-Peer Top-k Query Processing.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
Knowledge Transfer
2022
-
PosterMaropaki, Stella; Chester, Sean; Doulkeridis, Christos; Nørvåg, Kjetil. (2022) Diversifying Top-k Point-of-Interest Queries via Collective Social Reach. NorwAI Innovate 2022 2022-10-31 - 2022-11-01
2005
-
Academic lectureNørvåg, Kjetil; Overskeid Nybø, Albert. (2005) Improving space-efficiency in temporal text-indexing. The 10th International Conference on Database Systems for Advanced Applications , Beijing 2005-04-17 - 2005-04-20
-
Academic lectureNørvåg, Kjetil; Øyri, Randi. (2005) News Item Extraction for Text Mining in Web Newspapers. IEEE International Workshop on Challenges in Web Information Retrieval and Integration (in conjunction with ICDE'2005), , Tokyo 2005-04-08 - 2005-04-09
2004
-
Academic lectureNørvåg, Kjetil; Schmidt, Albrecht. (2004) XML Database Application Development through a Stepwise Refinement Prototyping Process. 6th International Conference on Enterprise Information Systems , Porto 2004-04-14 - 2004-04-17
2003
-
Academic lectureNørvåg, Kjetil; Myklebust, Lene; Limstrand, Marit. (2003) TeXOR: Temporal XML Database on an Object-Relational Database System. Andrei Ershov Fifth Internation Conference on Perspectives of System Informatics , Novosibirsk/Akademgorodok, Russia 2003-07-09 - 2003-07-12
-
Academic lectureNørvåg, Kjetil; Myklebust, Lene; Limstrand, Marit. (2003) TeXOR: Temporal XML Database on an Object-Relational Database System. Andrei Ershov Fifth Internation Conference on Perspectives of System Informatics , Novosibirsk/Akademgorodok, Russia 2003-07-09 - 2003-07-12
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Academic lectureValavanis, Efstratios; Ververidis, Christopher; Vazirgiannis, Michalis; Polyzos, George C.; Nørvåg, Kjetil. (2003) MobiShare: Sharing Context-Dependent Data & Services from Mobile Sources. The 2003 IEEE/WIC International Conference on Web Intelligence (WI 2003) , Halifax, Canada 2003-10-17 -
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Academic lectureNørvåg, Kjetil. (2003) V2: A Database Approach to Temporal Document Management. International Database Engineering & Applications Symposium , Hong Kong, SAR 2003-07-18 -
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Academic lectureNørvåg, Kjetil. (2003) Space-Efficient Support for Temporal Text Indexing in a Document Archive Context. The 7th European Conference on Research and Advanced Technology for Digital Libraries , Trondheim, Norway 2003-08-22 -
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Academic lectureNørvåg, Kjetil; Myklebust, Lene; Limstrand, Marit. (2003) TeXOR: Temporal XML Database on an Object-Relational Database System. Andrei Ershov Fifth Internation Conference on Perspectives of System Informatics , Novosibirsk/Akademgorodok, Russia 2003-07-12 -
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PosterNørvåg, Kjetil. (2003) The V2 Temporal Document Database System. The Twelfth International World Wide Web Conference (WWW2003) , Budapest, Hungary 2003-05-24 -
2002
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Academic lectureNørvåg, Kjetil. (2002) Temporal XML Data Warehouses: Challenges and Solutions. Workshop on Knowledge Foraging for Dynamic Networking of Communities and Economies , Shiraz, Iran 2002-10-29 -
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Academic lectureNørvåg, Kjetil. (2002) Algorithms for Temporal Query Operators in XML Databases. XML-Based Data Management (XMLDM) , Praha , Czech Republic 2002-03-24 -
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Academic lectureNørvåg, Kjetil. (2002) Temporal Query Operators in XML Databases. 2002 ACM Symposium on Applied Computing , Madrid, Spain 2002-03-14 -
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Academic lectureNørvåg, Kjetil. (2002) Algorithms for Temporal Query Operators in XML Databases. XML-Based Data Management Workshop (XMLDM) (in conjunction with EDBT'2002) , Prague, Czech Republic 2002-03-24 -
2001
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Academic lectureNørvåg, Kjetil. (2001) Object and Log Management in Temporal Log-Only Object Database Systems. Advances in Databases and Information Systems, ADBIS 2001 , Vilnius, 25.-28. september 2001
2000
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Academic lectureNørvåg, Kjetil. (2000) An Approach to High-Performance Scalable Temporal Object Storage. High Performance Object Databases (HIPOD) 2000 , Cardiff, U.K, July 20-21 2000
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Academic lectureNørvåg, Kjetil. (2000) A Performance Evaluation of Log-Only Temporal Object Database Systems. The 12th International Conference on Scientific and Statistical Database Management (SSDBM 2000) , Berlin, 26.-28. juli 2000
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Academic lectureNørvåg, Kjetil. (2000) Main-Memory Management in Temporal Object Database Systems. Advances in Databases and Information Systems held Jointly with International Conference on Database Systems for Advanced Applications , Praha, 5.-9. september 2000
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Academic lectureNørvåg, Kjetil. (2000) Design Issues in Transaction-Time Temporal Object Database Systems. Advances in Databases and Information Systems held Jointly with International Conference on Database Systems for Advanced Applications , Praha, 5.-9. september 2000
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Academic lectureNørvåg, Kjetil. (2000) The Vagabond Temporal OID Index: An Index Structure for OID Indexing in Temporal Object Database Systems. The 2000 International Database Engineering and Applications Symposium (IDEAS 2000) , Yokohama, Japan, 18.-20. september 2000
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Academic lectureNørvåg, Kjetil. (2000) A Comparative Study of Log-Only and In-Place Update Based Temporal Object Database Systems. The Ninth ACM Conference on Information and Knowledge Management (ACM CIKM'2000) , McLean, Virginia, USA, 6-11 november 2000
1999
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Academic lectureNørvåg, Kjetil. (1999) Efficient Use of Signatures in Object-Oriented Database Systems. Advances in Databases and Information Systems (ADBIS'99) , Maribor, Slovenia
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Academic lectureNørvåg, Kjetil. (1999) The Persistent Cache: Improving OID Indexing in Temporal Object-Oriented Database Systems. 25th International Conference on Very Large Data Bases (VLDB'99 ) , Edinburgh, Scotland, U.K.
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Academic lectureNørvåg, Kjetil. (1999) The Vagabond Parallel Temporal Object-Oriented Database System: Versatile Support for Future Applications. NIK'99 , Trondheim, 16.-17. november 1999
1998
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Academic lectureNørvåg, Kjetil; Bratbergsengen, Kjell. (1998) Optimizing OID indexing cost in temporal object-oriented database systems. The 5th International Conference on Foundations of Data Organization , Kobe, Japan
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Academic lectureNørvåg, Kjetil; Bratbergsengen, Kjell. (1998) An analytical study of object identifier indexing. 9th International Conference on Database and Expert Systems App lications , Wien
1997
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Academic lectureNørvåg, Kjetil; Bratbergsengen, Kjell. (1997) Write optimized object-oriented database systems. Chilean Computer Society. XVII International Conference , Valparaiso
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Academic lectureBratbergsengen, Kjell; Nørvåg, Kjetil. (1997) Improved and optimized partitioning techniques in database query processing. 15th British National Conference on Databases , London
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Academic lectureNørvåg, Kjetil; Bratbergsengen, Kjell. (1997) Log-only temporal object storage. 8th International Workshop on Database and Expert Systems Appli cations , Toulouse
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Academic lectureNørvåg, Kjetil; Sandstå, Olav; Bratbergsengen, Kjell. (1997) Concurrency control in distributed object-oriented database systems. 1st East-European Symposium on Advances in Databases and Inform ation Systems , St. Petersburg
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Academic lectureNørvåg, Kjetil; Sandstå, Olav. (1997) Concurrency control in distributed page-server systems. 3rd International Symposium on Programming and Systems , Algerie
1996
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Academic lectureBratbergsengen, Kjell; Nørvåg, Kjetil. (1996) Optimizing hash partitioning in relational algebra. Norsk informatikkonferanse , Alta
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Academic lectureNørvåg, Kjetil; Bratbergsengen, Kjell. (1996) Aggregate and grouping functions in object-oriented databases. XVI International Conference of the Chilean Computer Science So ciety , Valdivia, Chile
1994
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Academic lectureNørvåg, Kjetil. (1994) Neurocomputer taxonomies. World Congress on Neural Networks 1994 , [Mangler data]