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Now showing items 91-100 of 257
Spatial coherence of speckle for repeat-pass synthetic aperture sonar micronavigation
(2021-03-31)
Accurate positioning of autonomous underwater vehicles is a major challenge. The long-term drift is problematic if global position updates are not available, and for applications such as repeat-pass interferometry and ...
Formation Path Following Control of Underactuated USVs
(2021-06-30)
This paper proposes a formation control method for two underactuated unmanned surface vessels (USVs) to follow curved paths in the presence of ocean currents. By uniting a line-of-sight (LOS) guidance law and the ...
Characterizing the dynamic range of a hyperspectral camera
(2021-04-12)
The dynamic range of a hyperspectral camera can have a strong impact on the quality and integrity of the collected spectra. For the image sensor chip alone, the dynamic range is the ratio between the saturation level and ...
Predicting scalar coupling constants via machine learning
(2021-12-22)
Over the preceding decade, machine learning techniques have been successfully applied in several
fields of research, including the prediction of chemical properties of atoms and molecules. Whereas
conventional quantum ...
Vil du fortsette i jobben for en million kroner? – bruk av retensjonsbonus i Forsvaret
(2021-09-10)
Vil personell i Forsvaret bli værende i jobben om de får utbetalt en bonus for å fortsette? Siden 2004 har Forsvaret benyttet en slik retensjonsbonus for å beholde en bestemt personellgruppe – de som er ansatt til de er ...
Comparison of thermal runaway initiation methods for a cylindrical Li-ion cell
(2021-08-30)
Li-ion batteries have become an important part of our daily life in applications as different as cell phones and electric ferries. High energy density is one of the factors for the successful market penetration of this ...
Overvåking av tungmetallforurensning ved Forsvarets destruksjonsanlegg for ammunisjon i Lærdal kommune – resultater for 2020
(2021-10-21)
I Øyradalen sørøst for Lærdal sentrum ligger Forsvarets demoleringsfelt for ammunisjon. Dette
området ble etablert i 1976 og har siden blitt benyttet av Forsvaret. For å overvåke
konsentrasjonen av tungmetaller i dette ...
Kildegrunnlag og metode i FFIs studier av russisk forsvarsøkonomi
(2021-12-21)
I denne rapporten redegjør vi for kildegrunnlaget i FFIs studier av russisk forsvarsøkonomi.
Rapporten inneholder en gjennomgang av sentrale primær- og sekundærkilder samt en diskusjon
av kvaliteten på kildetilfanget og ...
Modeling underwater explosions: Extending Charles to FIVER
(2021-09-27)
Modeling of explosions and implosions under water is important for design of vehicles and installations both under water and on the sea surface. There exists simple models, often in the form of empirical calibrations, for ...
Algorithms for analysis of ballistic radar data
(2021-12-14)
This report describes the algorithms used for processing ballistic radar data at the Norwegian
Defence Research Establishment (FFI). A ballistic radar measures the velocity history of
projectiles. This is used to determine ...