Browsing Articles by Author "Andreassen, Øyvind"

Now showing items 1-5 of 5

    • Assessment of the dispersion of Legionella-containing aerosols from a biological treatment plant 

      Blatny, Janet Martha; Tutkun, Murat; Fossum, Hannibal Eie; Skogan, Gunnar; Fykse, Else-Marie; Andreassen, Øyvind; Waagen, Viggo; Reif, Bjørn Anders Pettersson (2011)
      Legionella was detected in aeration ponds (biological treatment plant) at Borregaard Ind. Ltd., Norway, and in air samples harvested directly above these ponds. Since 2005, three outbreaks of legionellosis occurred within ...

    • Comparative visualization of multiple time surfaces by planar surface reformation 

      Brambilla, Andrea; Angelelli, Paolo; Andreassen, Øyvind; Hauser, Helwig (2016)
      Comparing time surfaces at different integration time points, or from different seeding areas, can provide valuable insight into transport phenomena of fluid flows. Such a comparative study is challenging due to the often ...

    • Energy-scale Aware Feature Extraction for Flow Visualization 

      Pobitzer, Armin; Tutkun, Murat; Andreassen, Øyvind; Fuchs, R; Peikert, Ronald; Hauser, Helwig (2011)
      In the visualization of flow simulation data, feature detectors often tend to result in overly rich response, making some sort of filtering or simplification necessary to convey meaningful images. In this paper we present ...

    • Flow noise reduction from superhydrophobic surfaces 

      Elboth, Thomas; Reif, Bjørn Anders Pettersson; Andreassen, Øyvind; Martell, Michael B. (2012)
      This work investigates how a highly (super)hydrophobic surface can be used to reduce turbulence-generated drag and noise on a towed streamer cable. The work is done by analyzing full-scale drag and flow noise measurements ...

    • Tracking airborne Legionella and Legionella pneumophila at a biological treatment plant 

      Blatny, Janet Martha; Reif, Bjørn Anders Pettersson; Skogan, Gunnar; Andreassen, Øyvind; Høiby, Ernst Arne; Ask, Eirik; Waagen, Viggo; Aanonsen, Dag; Aaberge, Ingeborg Aase S.; Caugant, Dominique A (2008)
      Biological treatment plants are frequently used to degrade organic substances in wastewater from wood refinement processes. Aeration ponds in such plants provide an optimal growth environment for many microorganisms, ...