Browsing Brage IMR by Author "Korneliussen, Rolf J."
Now showing items 1-20 of 23
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A unifying theory explaining different power budget formulations used in modern scientific echosounders for fish abundance estimation
Lunde, Per; Korneliussen, Rolf J. (Fisken og Havet;7-2014, Research report, 2014-12-31)Acoustic methods used in fish abundance estimation constitute a key part of the analytic assessment that makes the basis for fisheries research and international regulations of marine resources. The methods rely on ... -
A unifying theory explaining different power budget formulations used in modern scientific echosounders for fish abundance estimation
Lunde, Per; Korneliussen, Rolf J. (Research report, 2014-12-31)Acoustic methods used in fish abundance estimation constitute a key part of the analytic assessment that makes the basis for fisheries research and international regulations of marine resources. The methods rely on power ... -
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 ... -
Akustisk identifikasjon av makrell
Korneliussen, Rolf J. (Havforskningsnytt, Working paper, 2006) -
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. ... -
The Bergen multifrequency analyzer (BMA): A new toolbox for acoustic catagorization and species identification
Ona, Egil; Korneliussen, Rolf J.; Knudsen, Hans Petter; Rang, Kjell; Eliassen, Inge; Heggelund, Yngve; Patel, Daniel (Others, 2004) -
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, ... -
Cruise summary report [18/10 - 8/11, 2004]
Korneliussen, Rolf J.; Skagen, Dankert W.; Slotte, Aril ([Toktrapport/Havforskningsinstituttet];Nr. 3 - 2005, Working paper, 2005) -
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 ... -
Echogram noise quantification with application to herring observations
Korneliussen, Rolf J. (Others, 1999) -
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 ... -
Postprocessing system for echo sounder data
Foote, Kenneth G.; Knudsen, Hans Petter; Korneliussen, Rolf J.; Nordbø, Per Erik; Røang, Kjell (Journal article; Peer reviewed, 1991)Echo sounding is a powerful and widely used technique for remote sensing of the marine environment. In order to enhance the power of the echo sounder, a postprocessing system has been designed and realized in standard ... -
Power-budget and echo-integrator equations for fish abundance estimation
Lunde, Per; Pedersen, Audun O.; Korneliussen, Rolf J.; Tichy, Frank E.; Nes, Håvard (Fisken og Havet;10-2013, Research report, 2013-12-31)For abundance estimation and species identification on fisheries acoustic surveys, control with temperature and finite amplitude effects in the sea demands the calibration factor C of the conventional echo-integrator ... -
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 ... -
Simulations of multi-beam sonar echos from schooling individual fish in a quiet environment
Holmin, Arne Johannes; Handegard, Nils Olav; Korneliussen, Rolf J.; Tjøstheim, Dag (Journal article; Peer reviewed, 2012-12)A model is developed and demonstrated for simulating echosounder and sonar observations of fish schools with specified shapes and composed of individuals having specified target strengths and behaviors. The model emulates ... -
Some methods for the generation of combined-frequency echograms
Korneliussen, Rolf J. (Fisken og havet, Research report, 2002)Calibrated and digitised data from two or more discrete echo sounder frequencies can be combined for the purpose of separating and extracting the acoustic scattering from zooplankton and fish in mixed recordings. Methods ... -
The Hermes Lander project - the technology, the data, and the evaluation of concept and results
Godø, Olav Rune; Tenningen, Eirik; Ostrowski, Marek; Kubilius, Rokas; Kutti, Tina; Korneliussen, Rolf J.; Fosså, Jan Helge (Fisken og havet;3-2012, Research report, 2012)This report summarizes technology, operations, experience, and scientific results from the Hermes Lander project. The Project established an autonomous, multi-sensor, sub-sea sensor platform powered by batteries. The ...