Now showing items 9-28 of 2876

    • A 3D Reactive Collision Avoidance Algorithm for Nonholonomic Vehicles 

      Syre Wiig, Martin; Pettersen, Kristin Ytterstad; Krogstad, Thomas Røbekk (2018)
      This paper presents a 3D reactive collision avoidance algorithm for vehicles with nonholonomic constraints. The algorithm steers the heading and pitch angle of the vehicle in order to maintain a constant avoidance angle ...
    • A 3D reactive collision avoidance algorithm for underactuated underwater vehicles 

      Syre Wiig, Martin; Pettersen, Kristin Y.; Krogstad, Thomas Røbekk (2020-02-28)
      Avoiding collisions is an essential goal of the control system of autonomous vehicles. This paper presents a reactive algorithm for avoiding obstacles in a three‐dimensional space, and shows how the algorithm can be applied ...
    • A 3D Reactive Collision Avoidance Algorithm for Underactuated Vehicles 

      Syre Wiig, Martin; Pettersen, Kristin Ytterstad; Krogstad, Thomas Røbekk (2018)
      This paper presents a 3D reactive collision avoidance algorithm for vehicles with underactuated dynamics. The underactuated states cannot be directly controlled, but are controlled indirectly by steering the direction of ...
    • 3D Rendering of Shipwrecks from Synthetic Aperture Sonar 

      Lorentzen, Ole Jacob; Hansen, Roy Edgar; Sæbø, Torstein Olsmo; Synnes, Stig Asle Vaksvik; Geilhufe, Marc (2021-10-25)
      Synthetic aperture sonar (SAS) bathymetric mapping provides centimeter-scale horizontal resolution of the seafloor. Typically, SAS data has been visualized as 2D images or gridded 2.5D surfaces, but it can also be plotted ...
    • 3D terrengmodell generert på bakgrunn av data fra digital bildeanalyse 

      Palm, Hans Christian; Braathen, Bjørn (2003)
      This report describes a technique for generating a digital terrain model of a given scene. The technique is based on first estimating the position and distance to parallelograms placed in various parts of the scene by ...
    • The 3S3 experiment data report - using operational naval sonars to study the effects of continuous active sonar, and source proximity, on sperm whales 

      Kvadsheim, Petter H.; Isojunno, Saana; Curé, Charlotte; Siemensma, Marije L.; Wensveen, Paul; Lam, Frans-Peter A.; Roland, Rune; Benti, Benjamin; Sivle, Lise D; Burslem, Alec; Kleivane, Lars; Miller, Patrick J.O. (2021-03-18)
      The 3S project is an international collaborative effort with the aim to investigate behavioral reactions of cetaceans to naval sonar signals. The objectives of the third phase of the project (3S3) were to investigate if ...
    • The 3S² experiments - studying the behavioral effects of naval sonar on northern bottlenose whales, humpback whales and minke whales 

      Kvadsheim, Petter H.; Lam, Frans-Peter; Miller, Patrick; Sivle, Lise D.; Wensveen, Paul; Roos, Marjoleine; Tyack, Peter; Kleivane, Lars; Visser, Fleur; Curé, Charlotte; van IJsselmuide, Sander (2015-11-03)
      In order to properly consider how behavioral responses to anthropogenic noise affect marine mammals and establish safety limits for sonar operations, there is a need to establish behavioral impact criteria. In order to ...
    • 889 Systemarkitektur : erfaringer og anbefalinger 

      Skogstad, Arne K.; Hansbø, Morten (2010)
      Denne rapporten gir en kort innføring i systemarkitekturfaget, dets anvendelseser i det militære domenet, potensielle nytteverdi og noen sentrale konsepter og verktøy. Det legges spesiell vekt på NAF (NATO Architecture ...
    • The A.Q. Khan network 

      Breivik, Hanne; Toft, Heidi Kristine (2007)
      Dr. Abdul Qadeer Khan var sentral i utviklingen av den pakistanske atombomben. Det har lenge vært kjent at Pakistan har importert både teknologi og materialer for anriking av uran fra Europa, og det har vært antatt at ...
    • A2/AD and the missile threat - systems, countermeasures and models 

      Musland, Lars (2021-03-12)
      In this report we discuss the (relatively) novel military term A2/AD, which is an acronym for Anti- Access/Area Denial. We cover both general aspects related to how the term should be understood, Russian A2/AD capabilities ...
    • 'Abdallah 'Azzam and Palestine 

      Hegghammer, Thomas (2013)
      ʿAbdallāh ʿAzzām (1941–1989) helped make jihadism more transnational by spearheading the effort to bring Muslim foreign fighters to Afghanistan in the 1980s. But why would a West Bank native devote himself to a war in ...
    • Abstraction-decomposition space for critical infrastructure systems: A framework for infrastructure planning and resilience policies 

      Sellevåg, Stig Rune (2022-04-20)
      The objective of this work has been to propose a framework that will aid governments with the development of more coherent and effective infrastructure planning and resilience policies through a system-of-systems approach ...
    • Abstracts from The Cold Weather Operations Conference 2021 

      Norheim, Arne Johan; Rannestad, Bård Stian; Howes, Richard; Rein, Erling Bekkestad; Jørum, Ellen; Friedl, Karl; Havenith, George; Teien, Hilde Kristin; Mercer, James; Melau, Jørgen; de Weerd, Louis; Smith, Michael; Taylor, Natalie; Voie, Øyvind Albert; Bergan-Skar, Pål; Andrews, Steve; Næsheim, Torvind; Steinberg, Tuva (2022-03-11)
      A common effort for both military and civil healthcare is to achieve knowledge-based health care in cold weather injuries and fatal accidents in harsh arctic environment. The Cold Weather Operations Conference in November ...
    • Accumulation of lead (Pb) in brown trout (Salmo trutta) from a lake downstream a former shooting range 

      Mariussen, Espen; Heier, Lene Sørlie; Teien, Hans-Christian; Pettersen, Marit Nandrup; Holth, Tor Fredrik; Salbu, Brit; Rosseland, Bjørn Olav (2017)
      An environmental survey was performed in Lake Kyrtjønn, a small lake within an abandoned shooting range in the south of Norway. In Lake Kyrtjønn the total water concentrations of Pb (14 µg/L), Cu (6.1 µg/L) and Sb (1.3 ...
    • Acoustic seabed classification using QTC IMPACT on single-beam echo sounder data from the Norwegian Channel, northern North Sea 

      Eidem, Ellen Johanne; Landmark, Knut (2013)
      Sediment mapping is important for understanding the physical processes, the impact of human activity, and the conditions for marine life on the seabed. For this purpose, the seabed classification tool QTC IMPACT analyses ...
    • Active spacecraft potential control investigation 

      Torkar, K.; Nakamura, R.; Tajmar, Martin; Scharlemann, C.; Jeszensky, H.; Laky, G.; Fremuth, G.; Escoubet, C. P.; Svenes, Knut Ragnar (2014)
      In tenuous plasma the floating potential of sunlit spacecraft reaches tens of volts, positive. The corresponding field disturbs measurements of the ambient plasma by electron and ion sensors and can reduce micro-channel ...
    • Ad hoc networks used in emergency networks : the Trust Metric Routing approach 

      Winjum, Eli; Kure, Øivind; Spilling, Pål (2006)
      Mobile wireless ad hoc networks have characteristics, which intuitively make them well suited for utilization in search and rescue operations. This report discusses and describes how mobile wireless ad hoc networks will ...
    • Adapting OLSR for WSNs (iOLSR) Using Locally Increasing Intervals 

      Larsen, Erlend; Flathagen, Joakim; Pham, Vinh Quang; Landmark, Lars (2012)
      Proactive link state routing protocols, popular within the Mobile Ad hoc NETwork framework, have not been as successful in wireless sensor networks. This is mainly due to the extensive energy usage by control traffic ...
    • Adapting Web Services for Limited Bandwidth Tactical Networks, published at the 12th ICCRTS 

      Hafsøe, Trude; Johnsen Frank T.; Lund, Ketil; Eggen, Anders (2007)
      Web Services er i utstrakt bruk på Internett i dag, og hyllevare er lett tilgjengelig. Web Services blir vurdert som en grunnteknologi for Nettverksbasert Forsvar, og virker lovende fordi både synkrone og asynkrone ...
    • Adaptive coded modulation under noisy channel state information and antenna diversity 

      Duong, Duc V. (2007)
      Rapporten omhandler analyse og optimalisering av single-carrier adaptiv kodet modulasjonssystemer med antennediversitet hvor multidimensjonal trellis koder er brukt som komponentkoder. Både estimerings- og prediksjonsfeil ...