Blar i ICES CM documents authored by IMR scientists (1949-2011) på forfatter "Korneliussen, Rolf J."

Viser treff 1-10 av 10

    • Acoustic backscatter from zooplankton and fish explored through an optimized model framework 

      Lebourges-Dhaussy, A.; Knutsen, Tor; Korneliussen, Rolf J. (ICES CM Documents;2004/R:39, Working paper, 2004)
      The purpose of this work has been to test complementary methods in order to classify marine organisms, with particularly attention to zooplankton and fish. Algorithms to separate fish and zooplankton have been developed ...

    • Advances in Bergen Echo Integrator 

      Korneliussen, Rolf J. (ICES CM Documents;1993/B:28, Working paper, 1993)
      The Bergen Echo Integrator (BEl) is a software system designed for convenient postprocessing of echo sounder data. BEl is realized in international standards and is essentially machine independent. Development of BEl for ...

    • An integrated database for marine research 

      Floen, Svein; Gjøsæter, Harald; Korneliussen, Rolf J.; Sagen, Helge; Thorvaldsen, Petter A.; Wennevik, Vidar (ICES CM Documents;1993/D:23, Working paper, 1993)
      In 1992 an integrated model for marine research data was developed at the Institute of Marine Research. Traditionally, the marine research disciplines collect data from their own fields, normally used in a limited context. ...

    • Combined algorithms for detection of acoustic categories 

      Korneliussen, Rolf J.; Ona, Egil (ICES CM Documents;2004/R:38, Working paper, 2004)
      There is a current desire to harvest marine resources by managing total marine ecosystems rather than single species of the ecosystems. By means of algorithms applied on high-quality multi-frequency acoustic data, species, ...

    • Detection of spatial distribution of acoustic categories 

      Korneliussen, Rolf J.; Ona, Egil (ICES CM documents, Working paper, 2005)

    • Diurnal variations in acoustic density measurements of wintering Norwegian spring spawning herring 

      Huse, Ingvar; Korneliussen, Rolf J. (ICES CM Documents;1995/B:12, Working paper, 1995)
      Survey data from six herring assesment cruises in the wintering areas for spring spawning Norwegian herring were analysed with regard to variation in abundance and depth with time of day. The data were quite consistant ...

    • On acoustic multi-frequency species identification and separation of Atlantic mackerel, Norwegian spring spawn herring and Norway pout. 

      Gorska, Natalia; Ona, Egil; Korneliussen, Rolf J. (ICES CM documents, Working paper, 2004)
      The accuracy of the multi-frequency species identification and separation algorithms may be significantly improved when the detailed acoustic scattering characteristics of the fish are known, including its expected variability ...

    • Recommendations for the collection of multifrequency acoustic data 

      Korneliussen, Rolf J.; Diner, Noel; Ona, Egil; Fernandes, Paul G. (ICES CM Documents;2004/R:36, Working paper, 2004)
      Traditionally, collection of acoustic data has been optimised for a single frequency, while requirements for the optimal combination of multifrequency data has been given less attention. Even though data manipulation can ...

    • The relative frequency response, as derived from individually separated targets on cod, saithe and Norway pout 

      Pedersen, Geir; Korneliussen, Rolf J.; Ona, Egil (ICES CM documents, Working paper, 2004)
      The relative frequency response is an important acoustic feature used to characterise acoustic targets. This response has been defined as the sv, volume backscattering coefficient, for a specific frequency relative to ...

    • Verified acoustic identification of Atlantic mackerel 

      Korneliussen, Rolf J.; Ona, Egil (ICES CM documents, Working paper, 2004)
      Calibrated, digitised data from simultaneously working multi-frequency echo sounders with nearly identical and overlapping acoustic beams have been used to generate new, synthetic echograms where only targets identified ...