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Nils Damm Christophersen

Professor Emeritus - Department for Informatics
Image of Nils Damm Christophersen
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Visiting address Gaustadalléen 23B Ole-Johan Dahls hus 0373 Oslo
Postal address P.O. Box 1080 Blindern 0316 Oslo

Academic Interests

My background is in applied mathematics and statistics particularly within digital signal processing. In addition, I have a long term interest in innovation and entrepreneurship in the university sector. 

Higher education and employment history

Employment

  • 2006 – 2009      Board member at the University of Oslo
  • 2003 – 2004      Dean of studies, Faculty of Mathematics and Natural Sciences
  • 2000 – 2006     Group leader Digital signal and image analysis (DSB). 
  • 1998 – 1999      Head, Department of informatics
  • 1997 – 1998      Visiting scientist, Department of Statistics, Stanford University
  • 1991 –               Professor, Department of informatics, University of Oslo
  • 1988 – 1989      Visiting scientist, Institute of Hydrology, UK
  • 1986 – 1991      Adjunct professor Department of informatics, University of Oslo
  • 1978 – 1991      Research scientist, Center for industrial Research/SINTEF, Oslo
  • 1975 – 1977      Associate professor, Department of physics, University of Oslo
  • 1972 – 1975      Research scientist, Norwegian Defence Research Establishment

Education:

  • 1983 Dr. Philos.  (PhD) (environmental modeling of impacts of acid rain), Center for Industrial Research (SINTEF)/Department of informatics, University of Oslo
  • 1972  Cand. real. (M.Sc.) in cybernetics, Norwegian Defense Research Establishment /Department for Physics, University of Oslo

Honoraria

Tags: applied mathematics, statistics, innovation, entrepreneurship

Publications

  • Dahl, Tobias Gulden; Pereira, SS; Christophersen, Nils Damm & Gesbert, David (2007). Intrinsic subspace convergence in TDD MIMO communication. IEEE Transactions on Signal Processing. ISSN 1053-587X. 55. doi: 10.1109/TSP.2007.896901. Full text in Research Archive
  • Dahl, Tobias Gulden; Lingjærde, Ole Christian & Christophersen, Nils Damm (2005). Local-ICA: independent component analysis for sources with non-stationary amplitudes. In Bouzerdoum, A. & Beghdadi, A. (Ed.), Proceedings of the Eighth International Symposium on Signal Processing and Its Applications, 2005. IEEE (Institute of Electrical and Electronics Engineers). ISSN 9780780392434. Full text in Research Archive
  • Dahl, Tobias Gulden; Christophersen, Nils Damm & Gesbert, David (2004). Blind MIMO Transmission based on the Algebraic Power Method. IEEE Transactions on Signal Processing. ISSN 1053-587X. 52(9), p. 2424–2431. doi: 10.1109/TSP.2004.832000. Full text in Research Archive
  • Dahl, T; Christophersen, Nils Damm & Gesbert, David (2004). Blind MIMO eigenmode transmission based on the algebraic power method. IEEE Transactions on Signal Processing. ISSN 1053-587X. 52, p. 2424–2431. Full text in Research Archive
  • Bølviken, Erik; Acklam, Peter John; Christophersen, Nils Damm & Størdal, J.M. (2001). Monte-Carlo filters for non-linear state estimation. Automatica. ISSN 0005-1098. 37(2), p. 177–183. Full text in Research Archive
  • Lingjærde, Ole Christian & Christophersen, Nils Damm (2000). Shrinkage Structure of Partial Least Squares. Scandinavian Journal of Statistics. ISSN 0303-6898. 27(3), p. 459–473. Full text in Research Archive
  • Kugiumtzis, Dimitris; Lingjærde, Ole Christian & Christophersen, Nils Damm (1998). Regularized Local Linear Prediction of Chaotic Time Series. Physica D : Non-linear phenomena. ISSN 0167-2789. 112(3-4), p. 344–360. Full text in Research Archive
  • Sjøberg, Dag & Christophersen, Nils Damm (1996). Den menneskefiendtlige informasjonsteknologien ­ og andre myter, Schola. Full text in Research Archive
  • Andersen, Sjur; Christophersen, Nils Damm; Mulder, Jan; Seip, Hans Martin & Vogt, Rolf David (1990). Aluminium solubility in the various soil horizons in an acidified catchment. In Mason, B.J. (Eds.), The surface water acidification programme. Cambridge University Press. ISSN 9780521395335. p. 155–159. Full text in Research Archive
  • Christophersen, Nils Damm; Hauhs, Michael; Mulder, Jan; Seip, Hans Martin & Vogt, Rolf David (1990). Hydrogeochemical processes in the Birkenes catchment. In Mason, B.J. (Eds.), The surface water acidification programme. Cambridge University Press. ISSN 9780521395335. p. 97–106. Full text in Research Archive
  • Christophersen, Nils Damm; Neal, Colin; Hooper, Richard; Vogt, Rolf David & Andersen, Sjur (1990). Christophersen N, Neal C, Hooper RP, Vogt RD, Andersen S. Modelling streamwater chemistry as a mixture of soilwater end-members — A step towards second-generation acidification models. Journal of Hydrology. ISSN 0022-1694. 116(1), p. 307–320. doi: 10.1016/0022-1694(90)90130-P. Full text in Research Archive
  • Vogt, Rolf David; Andersen, Dag Olav; Andersen, Sjur; Christophersen, Nils Damm & Mulder, Jan (1990). Streamwater, soil-water chemistry, and water flow paths at Birkenes during a dry-wet hydrological cycle. In Mason, B.J. (Eds.), The surface water acidification programme. Cambridge University Press. ISSN 9780521395335. p. 149–154. Full text in Research Archive

View all works in NVA

  • Leister, Wolfgang & Christophersen, Nils Damm (2014). INF5780 - Open source, open collaboration and innovation - Høst 2014. Full text in Research Archive
  • Christophersen, Nils Damm & Leister, Wolfgang (2014). Governance of Open Source and Commons-Based Peer Production. Full text in Research Archive
  • Leister, Wolfgang & Christophersen, Nils Damm (2013). INF5780 - Open source, open collaboration and innovation - Høst 2013. Full text in Research Archive
  • Leister, Wolfgang & Christophersen, Nils Damm (2012). ITLED4240 - Åpen programvare, åpent samarbeid og innovasjon. Full text in Research Archive
  • Leister, Wolfgang & Christophersen, Nils Damm (2012). INF5780 - Open source, open collaboration and innovation - Høst 2012. Full text in Research Archive
  • Leister, Wolfgang & Christophersen, Nils Damm (2011). INF5780 - Open source, open collaboration and innovation - Høst 2011. Full text in Research Archive
  • Leister, Wolfgang & Christophersen, Nils Damm (2011). Åpen programvare og åpent samarbeid. Full text in Research Archive
  • Leister, Wolfgang; Christophersen, Nils Damm & Jayaraman, Karthik (2010). INF5780 - Open source, open collaboration and innovation - Høst 2010. Full text in Research Archive
  • Christophersen, Nils Damm (2010). Wikipedia som dugnadsbasert allmenning. Full text in Research Archive
  • Christophersen, Nils Damm (2009). Wikipedia and science – two knowledge commons. Full text in Research Archive
  • Christophersen, Nils Damm (2009). Åpen kildekode, åpent samarbeid og innovasjon. Full text in Research Archive
  • Leister, Wolfgang; Christophersen, Nils Damm & Tsiavos, Prodromos (2009). INF5780 - Open source, open collaboration and innovation - Høst 2009. Full text in Research Archive
  • Christophersen, Nils Damm (2008). Fri programvare og andre dugnadsprosjekter i I- og U-land. Full text in Research Archive
  • Christophersen, Nils Damm (2008). Open source, open collaboration, and disruptive innovation. Full text in Research Archive
  • Christophersen, Nils Damm (2008). Lessons learned from the open source HISP health information program. Full text in Research Archive
  • Christophersen, Nils Damm (2007). Wikipedia og andre nettsamfunn som inspirasjon for fremtidig formidling. Full text in Research Archive
  • Dahl, Tobias Gulden; Lingjærde, Ole Christian; Christophersen, Nils Damm & Ekman, Torbjørn (2005). Local-ICA: independent component analysis for sources with non-stationary amplitudes. Full text in Research Archive
  • Gesbert, David; Ekman, Torbjørn & Christophersen, Nils Damm (2002). Capacity limits of dense palm-sized MIMO arrays. Full text in Research Archive
  • Dahl, Tobias; Christophersen, Nils Damm & Gesbert, David (2002). BIMA Blind MIMO Algorithm. Full text in Research Archive
  • Christophersen, Nils Damm & Trulsen, Jan (2002). Få realfag inn i ex.phil. Aftenposten (morgenutg. : trykt utg.). ISSN 0804-3116. Full text in Research Archive
  • Christophersen, Nils Damm (2002). Digital Dignalbehandling og Bildeanalyse(DSB) ved UiO. NORSIGnalet : organ for NORSIG, Norsk forening for signalbehandling. ISSN 0804-5623. p. 3–4. Full text in Research Archive
  • Gesbert, David & Christophersen, Nils Damm (2002). Space: the final (wireless) fontier. NORSIGnalet : organ for NORSIG, Norsk forening for signalbehandling. ISSN 0804-5623. p. 4–8. Full text in Research Archive
  • Dahl, Tobias; Christophersen, Nils Damm & Gesbert, David (2002). Identification of parallel MIMO channels in wireless communication using power iterations. Full text in Research Archive
  • Holm, Sverre & Christophersen, Nils Damm (2001). Hvordan virker mobiltelefonen og hva har vi i vente? Full text in Research Archive
  • Holm, Sverre & Christophersen, Nils Damm (2001). Hvordan virker mobiltelefonen og hva har vi i vente? Full text in Research Archive
  • Leister, Wolfgang; Holm, Sverre & Christophersen, Nils Damm (2001). Multimedia Koding og Transmisjon - INF MKT Høst 2001. Full text in Research Archive
  • Norum, Kaare Reidar; Christophersen, Nils Damm; Elverhøi, Anders; Grue, John & Uggerud, Einar (2000). Hånd i hånd med næringslivet. Dagens næringsliv. ISSN 0803-9372. Full text in Research Archive
  • Lillekjendlie, Bjørn; Kugiumtzis, Dimitris & Christophersen, Nils Damm (1994). Chaotic time series : Part II: System identification and prediction. MIC Journal: Modeling, Identification and Control. ISSN 0332-7353. doi: 10.4173/mic.1994.4.2. Full text in Research Archive
  • Kugiumtzis, Dimitris; Lillekjendlie, Bjørn & Christophersen, Nils Damm (1994). Chaotic time series : Part 1: estimation of some invariant properties in state space. MIC Journal: Modeling, Identification and Control. ISSN 0332-7353. doi: 10.4173/mic.1994.4.1. Full text in Research Archive
  • Christophersen, Nils & Bruaset, Are (1992). In 104: Naturvitenskapelig Programmeringslaboratorium. Full text in Research Archive
  • Leister, Wolfgang; Christophersen, Nils Damm; Groven, Arne-Kristian; Tsiavos, Prodromos; Heggestøyl, Simen & Rødskog, Daniel (2015). INF5780 Compendium Autumn 2015: Open Source, Open Collaboration and Innovation. Norsk Regnesentral. Full text in Research Archive
  • Leister, Wolfgang; Christophersen, Nils Damm; Tsiavos, Prodromos; Groven, Arne-Kristian; Heggestøyl, Simen & Rødskog, Daniel [Show all 10 contributors for this article] (2014). INF5780 Compendium Autumn 2014: Open Source, Open Collaboration and Innovation. Norsk Regnesentral. Full text in Research Archive
  • Leister, Wolfgang; Christophersen, Nils Damm; Tsiavos, Prodromos; Groven, Arne-Kristian; Heggestøyl, Simen & Rødskog, Daniel [Show all 10 contributors for this article] (2013). INF5780 Compendium Autumn 2013: Open Source, Open Collaboration and Innovation. Norsk Regnesentral. Full text in Research Archive
  • Leister, Wolfgang & Christophersen, Nils Damm (2012). INF5780 Compendium Autumn 2012: Open Source, Open Collaboration and Innovation. Norsk Regnesentral. Full text in Research Archive
  • Leister, Wolfgang; Christophersen, Nils Damm & Groven, Arne-Kristian (2012). ITLED 4240 Compendium Spring 2012: Open Source, Open Collaboration and Innovation. Norsk Regnesentral. Full text in Research Archive
  • Leister, Wolfgang & Christophersen, Nils Damm (2011). INF5780 Compendium Autumn 2011: Open source, Open collaboration and Innovation. Norsk Regnesentral. Full text in Research Archive
  • Bølviken, Erik; Christophersen, Nils Damm & Storvik, Geir Olve (1998). Linear dynamical models, Kalman filtering and statistics. Lecture notes to IN-ST 259. Full text in Research Archive
  • Bølviken, Erik Helmer; Acklam, Peter J.; Christophersen, Nils Damm & Størdal, John-Mikal (1997). Monte Carlo filters for non-linear state estimation. Universitetet i Oslo. Full text in Research Archive
  • Kugiumtzis, Dimitris & Christophersen, Nils Damm (1997). State space reconstruction : method of delays vs singular spectrum approach. Universitetet i Oslo. Full text in Research Archive

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Published Nov. 4, 2010 1:49 PM - Last modified Nov. 11, 2024 3:01 PM