Helge Balk

Associate Professor - Electronics
Image of Helge Balk
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Phone +47-22856489
Mobile phone +47-97772401 97772401
Fax +47-22856422
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Visiting address Sem Sælands vei 24 Fysikkbygningen 0371 OSLO
Postal address Postboks 1048 Blindern 0316 OSLO
Other affiliations Department of physics

Personal homepage

Academic Interests

Teaching

Higher education and employment history

  • 2002..2003   Pedagogic
  • 2001..           Ass proff.
  • 1997.. 2001  Phd  / hydroacoustics UiO
  • 1994 ..1996  Master  measureing tehchnique / electronics  UiO
  • 1992..1994   Bachelor  Physics  UiO
  • 1988..1992   Bachelor mathematical muduling  UiO- Informatics
  • 1986..1988   Norsk Hydro VAX operator
  • 1981..1986   Serviceleader Nortrade Elektronics
  • 1977..1980   Analog electronic educvation from Bleiker / Ruud

Appointments

  • Leader of the PhD-Commitee
  • Member of the Study-Lecturing and Research Commitee

Publications

  • Balk, Helge; Søvegjarto, Bendik Sørensen; Tušer, Michal; Froutzova, Jaroslava; Muška, Milan; Drastik, Vladislav; Baran, Roman & Kubecka, Jan (2017). Surface-induced errors in target strength and position estimates during horizontal acoustic surveys.. Fisheries Research.  ISSN 0165-7836.  188, s 149- 156 . doi: 10.1016/j.fishres.2016.12.017
  • Zhang, Hui; Balk, Helge; Wang, Chengyou; Wu, Jinming; Du, Hao; Shen, Li; Liu, Zhigang & Wei, Qiwei (2016). Search for Chinese paddlefish (Psephurus gladius) in the upper Yangtze River during 2009-2013 including reevaluation of data from 2006 to 2008. Aquatic Living Resources.  ISSN 0990-7440.  29(1) . doi: 10.1051/alr/2016008
  • Sajdlová', Zuzana; Draštík, Vladislav; Jůza, Tomáš; Říha, Milan; Frouzová, Jaroslava; Čech, Martin; Vašek, Mojmír; Muška, Milan; Blabolil, Petr; Tušer, Michal; Kratochvíl, Michal; Peterka, Jiří; Mrkvička, Tomáš; Balk, Helge & Kubečka, Jan (2015). Fish behaviour in response to a midwater trawl footrope in temperate reservoirs. Fisheries Research.  ISSN 0165-7836.  172, s 105- 113 . doi: 10.1016/j.fishres.2015.06.025
  • Guillard, Jean; Lebourges-Daussy, Anne; Balk, Helge; Colon, Michel; Godlewska, Małgorzata & Jóźwik, Adam (2014). Comparing hydroacoustic fish stock estimates in the pelagic zone of temperate deep lakes using three sound frequencies (70, 120, 200 kHz). INLAND WATERS.  ISSN 2044-2041.  4, s 435- 444 . doi: 10.5268/IW-4.4.733
  • Tuser, Michal; Frouzova, Jaroslava; Balk, Helge; Muska, Milan; Mrkvička, Tomáš & Kubecka, Jan (2014). Evaluation of potential bias in observing fish with a DIDSON acoustic camera. Fisheries Research.  ISSN 0165-7836.  155, s 114- 121 . doi: 10.1016/j.fishres.2014.02.031
  • Langkau, M C; Balk, Helge; Schmidt, MB & Borcherding, J (2012). Can acoustic shadows identify fish species? A novel application of imaging sonar data. Fisheries Management and Ecology.  ISSN 0969-997X.  19(4), s 313- 322 . doi: 10.1111/j.1365-2400.2011.00843.x
  • Rakowitz, Georg; Tuser, Michal; Riha, Milan; Juza, Tomas; Balk, Helge & Kubecka, Jan (2012). Use of high-frequency imaging sonar (DIDSON) to observe fish behaviour towards a surface trawl. Fisheries Research.  ISSN 0165-7836.  123, s 37- 48 . doi: 10.1016/j.fishres.2011.11.018
  • Tuser, Michael; Balk, Helge; Mrkvička, Tomáš; Frouzova, Jaroslava; Čech, Martin; Muska, Milan & Kubecka, Jan (2011). Validation of current acoustic dead-zone estimation methods in lakes with strongly sloped bottoms. Limnology and Oceanography : Methods.  ISSN 1541-5856.  9, s 507- 514 . doi: 10.4319/lom.2011.9.507
  • Schmidt, MB; Balk, Helge & Gassner, H (2009). Testing in situ avoidance reaction of vendace, Coregonus albula, in relation to continuous artificial light from stationary vertical split-beam echosounding. Fisheries Management and Ecology.  ISSN 0969-997X.  16(5), s 376- 385 . doi: 10.1111/j.1365-2400.2009.00689.x
  • Jurvelius, Juha; Knudsen, Frank R.; Balk, Helge; Marjomäki, Timo J.; Peltonen, Heikki; Taskinen, Jouni; Tuomaala, Antti & Viljanen, Markku (2008). Echo-sounding can discriminate between fish and macroinvertebrates in fresh water. Freshwater Biology.  ISSN 0046-5070.  53 . doi: 10.1111/j.1365-2427.2007.01944.x Show summary
  • Rudstam, Lars G.; Knudsen, Frank R.; Balk, Helge; Gal, Gideon; Boscarino, Brent T. & Axenrot, Thomas (2008). Acoustic characterization of Mysis relicta at multiple frequencies. Canadian Journal of Fisheries and Aquatic Sciences.  ISSN 0706-652X.  65(12), s 2769- 2779 . doi: 10.1139/Fo8-179 Show summary
  • Hohausova, E; Kubecka, J; Frouzova, J; Husak, S & Balk, Helge (2008). Experimental biomass assessment of three species of freshwater aquatic plants by horizontal acoustics. Journal of aquatic plant management.  ISSN 0146-6623.  46
  • Rakowitz, G; Herold, W; Fesl, C; Keckeis, H; Kubecka, J & Balk, Helge (2008). Two methods to improve the accuracy of target-strength estimates for horizontal beaming. Fisheries Research.  ISSN 0165-7836.  93(3), s 324- 331 . doi: 10.1016/j.fishres.2008.06.005
  • Frouzova, J; Kubecka, J; Balk, Helge & Frouz, J (2005). Target strength of some European fish species and its dependence on fish body parameters. Fisheries Research.  ISSN 0165-7836.  75, s 86- 96
  • Peltonen, H & Balk, Helge (2005). The acoustic target strength of herring (Clupea harengus L.) in the northern Baltic Sea. ICES Journal of Marine Science.  ISSN 1054-3139.  62, s 803- 808
  • Balk, Helge & Lindem, Torfinn (2000). Improved fish detection in data from split-beam sonar. Aquatic Living Resources.  ISSN 0990-7440.  13, s 297- 303 Show summary

View all works in Cristin

  • Balk, Helge (2005). Lineær kretselektronikk. Helge Balk.  ISBN 00-000-0000-0.  305 s. Show summary

View all works in Cristin

  • Kubecka, Jan; Balk, Helge; Roman, Baran; Boswell, Kevin; Froutsova, Jaroslava; Rudstam, Lars G. & Tušer, Michal (2015). Advances in Shallow Water Hydroacoustics.
  • Järnegren, Johanna; Balk, Helge; Uglem, Ingebrigt & Forseth, Torbjørn (2011). Telling av oppvandrende fisk i Mandalselva ved bruk av DIDSON. En pilotstudie. NINA rapport. 636. Show summary
  • Balk, Helge; Kubecka, Jan & Lindem, Torfinn (2010). Detection, tracking and sizing of fish in data from DIDSON multibeam sonars.
  • Rakowitz, Georg; Tuser, Michal; Riha, Milan; Balk, Helge & Kubecka, Jan (2010). Use of high-frequency imaging sonar to observe fish behaviour with respect to an active surface trawl.
  • Balk, Helge & Lindem, Torfinn (2009). Target detection in data from splitbeam echosounders and multi beam sonar systems.
  • Balk, Helge; Lindem, Torfinn & Kubecka, Jan (2009). New Cubic Cross filter detector for multi beam data recorded with DIDSON acoustic camera. Show summary
  • Drastik, Vladislav; Hohausova, Eva; Kubecka, Jan; Balk, Helge & Froutsova, Jaroslava (2009). Classification of fish and plant echoes in acoustic surveys. Show summary
  • Kubecka, Jan; Frouzova, Jaroslava; Balk, Helge; Čech, Martin; Draštík, Vladislav & Prchalová, Marie (2009). REGRESSIONS FOR CONVERSION BETWEEN TARGET STRENGTH AND FISH LENGTH IN HORIZONTAL ACOUSTIC SURVEYS. Show summary
  • Balk, Helge & Lindem, Torfinn (2008). Analysis and visualization of data from DIDSON Acoustic camera.
  • Balk, Helge; Lindem, Torfinn & Kubecka, Jan (2008). Split beam versus multi beam for monitoring migrating fish in rivers and shallow lakes.
  • Froutzova, Jaroslava; Kubecka, Jan & Balk, Helge (2008). Fat echoes of oblique aspects : consequences for fish single echo detection. Show summary
  • George, Rakowitz; Keckeis, Wolfgang; Herold, Wolfgang; Kubecka, Jan & Balk, Helge (2008). Evaluation of different fish size estimators in horizontal acoustic applications. Show summary
  • Gjelland, Karl Øystein; Knudsen, Frank & Balk, Helge (2008). Bias in swimming speed estimates from splitbeam acoustics should be corrected for with smoothing. Show summary
  • Kubecka, Jan; Balk, Helge; Drastic, Vladislav; Frouzova, Jaroslava; Gassner, Hubert; Herzig, Alois; Jarolim, Oldoich; Juza, Tomas; Kratochvil, Michael & Vasek, Mojmir (2008). Large-scale acoustic surveys of an extremely shallow lake: Neusiedler See, Austria. Show summary
  • Tuser, Michael; Balk, Helge; Froutsova, Jaroslava; Kubecka, Jan & Muska, Milan (2008). Suitability of DIDSON acoustic camera for quantitative fish stock assessment by mobile surveys. Show summary
  • Rudstam, Lars G.; Gal, Gideon; Balk, Helge; Knudsen, Frank R.; Axenrot, Thomas & Boscarino, Brent (2007). Multiple acoustic frequencies increase our ability to discriminate between fish, mysids and zooplankton. Show summary
  • Balk, Helge & Lindem, Torfinn (2007). Analysis of data from high frequency identification sonars combined with data from conventional echo-sounders. Show summary
  • Balk, Helge; Lindem, Torfinn; Kubecka, Jan & Frank, Knudsen (2007). Recent advances in solving signal-to-noise problems in fisheries acoustics. Show summary
  • Balk, Helge; Lindem, Torfinn & Kubecka, Jan (2006). Enhenced Crossfilter detector for target detection in data from echosounders. Show summary
  • Balk, Helge (2006). Introduction, presentation and theory for multifrequency hydroacoustics.
  • Balk, Helge (2006). Sound waves and fish abundance.
  • Balk, Helge (2006). Sound waves and fish abundance. Show summary
  • Balk, Helge (2005). A Ph. D. Class on Marine Bioacoustics: Hydroacoustics.
  • Balk, Helge (2005). New methods for fish and bottom detection in data from split beam echosounders.
  • Balk, Helge; Lindem, Torfinn & Kubecka, Jan (2005). New single echo detection methods for shallow water fisheries acoustics. Show summary
  • Balk, Helge; Lindem, Torfinn & Kubecka, Jan (2005). New single echo detection methods for shallow water fishery acoustics. Show summary
  • Balk, Helge (2004). Presentation of research results. Advanced analysis methods for fisheries acoustics. Detection methods for data characterised with low signal to noise ration.
  • Balk, Helge (2004). Reflection and diffraction of sound waves in shallow water and how this influences the sonar equations.
  • Balk, Helge & Lindem, Torfinn (2003). Fish detection based on spectral differences in the echogram's range and temporal domain.
  • Balk, Helge & Lindem, Torfinn (2003). A new method for single target detection. Show summary
  • Balk, Helge & Lindem, Torfinn (2002). Fish detection in rivers with split-beam sonars. Show summary
  • Lindem, Torfinn; Balk, Helge; Vibeke, J. & Kjølerbakken, K. M. (2002). Measurements of acoustic sound fields in a shallow river. Show summary
  • Balk, Helge (2001). Development of hydroacoustic methods for fish detection in shallow water. Show summary
  • Lindem, Torfinn; Balk, Helge & Knudsen, Frank R. (1999). Sound propagation through shallow water can make unexpected modification to fish echoes recorded with a horizontally looking split beam system. Show summary
  • Balk, Helge & Lindem, Torfinn (1999). Fish tracking in shallow water by image processing. Show summary
  • Lindem, Torfinn & Balk, Helge (1999). Problems related to Time Varied Gain (TVG) and phase measurements with elliptic split beam transducers in shallow water, - some observations. Show summary
  • Balk, Helge & Lindem, Torfinn (1998). Hydroacoustic fish counting in rivers and shallow waters, with focus on problems related to tracking in horizontal scanning sonars.

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Published Nov. 4, 2010 12:08 PM - Last modified Oct. 15, 2013 12:27 PM

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