Now showing items 500-519 of 2860

    • Detection of Legionella pneumophila in a biological treatment plant by co-cultivatiobn with Acanthamoeba castellanii 

      Fykse, Else-Marie; Aarskaug, Tone; Blatny, Janet Martha (2014)
      Legionella pneumophila was identified in the aeration ponds of a biological wastewater treatment plant at the pulp and paper industry Borregaard, Sarpsborg, Norway. After 3 outbreaks of Legionaires’ disease reported in ...
    • Detection of military objects in LADAR images 

      Palm, Hans Christian; Ajer, Halvor; Haavardsholm, Trym Vegard (2008)
      This report describes different techniques for preprocessing, segmentation, and detection of vehicle sized objects in LADAR images. Five preprocessing strategies are presented; 1) Median filtering, 2) Two 1-D median ...
    • Detection of Point Scatterers in Medical Ultrasound 

      Thon, Stine Hverven; Hansen, Roy Edgar; Austeng, Andreas (2021-11-19)
      We present an overview of the detection of point scatterers in ultrasound images and suggest strategies for evaluating and measuring the detection performance. We use synthetic aperture Field II simulations of a point ...
    • Detection performance for Incoherent Range Walk Compensation 

      Finden, Erlend; Christiansen, Jonas Myhre; Lie-Svendsen, Øystein; Olsen, Karl Erik (2014-11-24)
      FFI supports the Royal Norwegian Air Force in their acquisition of new air surveillance sensors. Improved detection performance on low observable targets may be obtained by increasing the radar dwell time on target. For ...
    • Detection: how many pixels are required? 

      Rheenen, Arthur Dirk van; Thomassen, Jan Brede (2020-09-23)
      In this work, we studied how detection range of a small target changes as a function of the number of defined target pixels. The intuitively simplest method to look for a target in IR images is to look for the “hottest” ...
    • Deteksjon av eksplosivrester i felt ved hjelp av hyperspektral avbildning 

      Karsrud, Tove; Parmer, Marthe Petrine; Skauli, Torbjørn (2009)
      Der er kjent at det i Forsvarets skytefelt ligger rester av eksplosiver, noe som hovedsakelig skyldes ufullstendig detonasjon av ammunisjon. Disse restene er vanskelige å finne, men er ansett å være et miljøproblem blant ...
    • Determination of chemical warfare agents in water samples by solid phase microextraction and GC-FID 

      Hussain, Fatima (2007)
      The Norwegian Defence Research Establishment (FFI) is presently developing a mobile laboratory for the identification of chemical warfare agents (CWA) and related compounds. The laboratory will be used in the field, and ...
    • Determination of critical diameter for DPX-6 

      Nevstad, Gunnar Ove (2006)
      M72 LAW (Light Antiarmour Weapon) has been redesigned with a new warhead for urban warfare. The new warhead is designed for combat of light buildings and therefore needs an explosive filling that is optimized for this ...
    • Determination of detonation pressure and velocity for RDX/GAP propellant 

      Author::Nevstad, Gunnar Ove (2017-03-13)
      Detonation velocity and detonation pressure have been determined for the solid propellant D- 07, a RDX/GAP propellant produced by Nammo Raufoss. Three firings, two with test item diameter 35.6+1 mm and one with diameter ...
    • Determination of detonation velocity and plate dent properties fir DPX-6 

      Nevstad, Gunnar Ove (2006)
      M72 LAW (Light Antiarmour Weapon) has been redesigned with a new warhead for urban warfare. The new warhead is designed for combat of light buildings and therefore need an explosive filling that is optimized for this ...
    • Determination of detonation velocity and plate dent properties of DPX-5 

      Nevstad, Gunnar Ove (2008)
      Detonation velocity for DPX-5 Ch 01/07 has been determined both experimentally and theoretically by use of the Cheetah 2.0 code. The measured detonation velocity was found to be 8276 m/s or approximately 350 m/s higher ...
    • Determination of detonation velocity and Plate Dent properties of DPX-9 and DPX-10 

      Nevstad, Gunnar Ove (2009)
      Two press and formable new plastic explosive compositions developed by Chemring Nobel containing RDX as main filler have been studied. Pellets pressed by Chemring Nobel AS were glued together at FFI to test charges of ...
    • Determination of detonation velocity and plate dent properties of PBXV-11 with 30 WT.% aluminium 

      Nevstad, Gunnar Ove (2008)
      Studied composition PBXW-11with 30wt.% aluminium class 7 powder is a Norwegian produced explosive equal to the American PBXIH-18 composition. By slightly modification of the aluminium content the studied composition will ...
    • Determination of detonation velocity and pressure for MCX-6100 

      Nevstad, Gunnar Ove (2015-12-02)
      Independent of the application of an explosive composition there are certain properties that are important to know. Performance depends on properties as detonation velocity and detonation pressure. Sensitivity of munitions ...
    • Detonation transfer : summary report, FFI project 803.03 

      Holm, Knut B.; Martinussen, Svein Erlend; Svinsås, Eirik (2003)
      In connection with the upgrade of AMRISK, a program for risk analysis of ammunition storages, the process of detonation transfer have been studied. Based on earlier work a model for sympathetic detonation is developed ...
    • DETOUR trials: The mission and its results 

      Stejskal, Vojtech; Kuschel, Heiner; Brenner, Tateusz; Lamentowski, Leszek; Norheim-Næss, Idar; Samczynski, Piotr; Kulpa, Janusz (2017)
      In this paper DMPAR Evaluation Trials for Operationally Upgraded Radar (DETOUR) and their results for a selected scenario are described. The DETOUR trials were conducted by the SET-195 research task group (RTG) under an ...
    • Development and Calibration of a Low-Cost Radar Testbed Based on the Universal Software Radio Peripheral 

      Christiansen, Jonas Myhre; Smith, Graeme E. (2019-12-01)
      For a cognitive radar algorithm to be useful, it must run on radar hardware that is flexible. Typically, this has been viewed as requiring a software-defined radio. With the emergence of cheap, digital transceiver systems, ...
    • Development of a chemical, atomic and toxic compound surveillance system - CATSS 

      Tørnes, John Aasulf; Gran, Hans Christian; Pedersen, Bjørn; Opstad, Aase Mari; Prydz, Petter Andre; Wiik, Øyvind; Nordahl, Anders (2004)
      A demonstrator of an automatic surveillance system for chemical, radiological and toxic compounds, called CATSS, has been developed at FFI. The system contains several commercially available detectors integrated into CATSS. ...
    • Development of LES inflow conditions for turbulent boundary layers 

      Wingstedt, Emma M. M.; Vartdal, Magnus; Osnes, Andreas N.; Tutkun, Murat (2013-10-31)
      Computational Fluid Dynamics (CFD) is currently the only known physically based method to model dispersion and transport of aerosols and gases in complex urban environments. One of the main challenges with CFD simulations ...