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Now showing items 2363-2382 of 2860
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SONATE 2020 – a decision aid tool to mitigate the impact of naval sonar operations on marine life
(2021-06-14)SONATE is a decision aid tool for planning of sonar exercises, to mitigate impact on marine life. The story of SONATE started with the Nansen-class frigates of the Norwegian Navy, which are equipped with 1-8 kHz sonars. ... -
SONATE 3.0 : a decision aid system to mitigate the impact of sonar operations in Norwegian waters on marine life
(2008)The Royal Norwegian Navy has purchased five new frigates equipped with 1-8 kHz active sonars. Such sonars are potentially harmful to marine life. Mass strandings of whales have been claimed to be caused by naval sonar ... -
Sosiale teknologier for samhandling og nettverking : fra publisering til deltagelse og sosial interaksjon
(2007)En generell militær trend er det økte fokuset på ”evne til samarbeid”. Bakgrunn for denne rapporten er ønske om å ta i bruk og utnytte ”moderne” informasjons- og kommunikasjonsteknologi (IKT) for å øke den militære evnen ... -
Sound propagation in regions of variable oceanography - a summary of student work at NTNU
(2010)Two ray tracing programs, Lybin and Ray5, have been used in student projects at NTNU to study wave propagation in range dependent environments. For a given set of sound speed profiles obtained during a FFI measuring ... -
Source Localization With Multiple Hydrophone Arrays via Matched-Field Processing
(2016)This paper considers approaches to combining information from multiple arrays in matched-field processing (MFP) for underwater acoustic source localization. The standard approach is to apply conventional MFP for each array ... -
Sourcing for Forsvarets IKT-virksomhet – skisse til rammeverk
(2022-12-12)Strategisk samarbeid har fått økt oppmerksomhet i de siste tre langtidsperiodene. Forsvarsdepartementet har etablert prinsippet så sivilt som mulig og så militært som nødvendig for at Forsvaret skal kunne nyttiggjøre seg ... -
South Africa´s nuclear weapons programme
(2008)In the 1970s and 1980s, South Africa had a secret nuclear weapons programme and built up a small arsenal of six simple, gun-type nuclear bombs. The bombs were deliverable by airplane, but were probably only intended as a ... -
The Space of Influence: Developing a New Method to Conceptualise Foreign Information Manipulation and Interference on Social Media
(2023-05)Foreign information manipulation and interference (FIMI) on social media is a fast- evolving threat to democracies. However, there is a growing need to systematically conceptualise the phenomenon. General Morphological ... -
Space-based AIS : theoretical considerations and system parameter optimization
(2006)The recently introduced Universal Automatic Identification System (AIS) is a ship-to-ship and ship-to-shore reporting system based on broadcasting of messages in the maritime VHF band. The AIS messages could also be ... -
Spaceborne Bistatic SAR Processing Using the EETF4 Algorithm
(2009)In this letter, the fourth-order extended exact transfer function (EETF4) is adapted for spaceborne bistatic synthetic aperture radar (SAR) processing. The problems with high squint and large bistatic Doppler centroid ... -
Sparse Phase Estimation and Processing of Independent Coherent Processing Intervals
(2017)Radars employing electronically steering arrays are capable of instantaneously altering the direction of the beam along with other parameters. This flexibility offers great opportunities to a radar as it may e.g. divide ... -
Sparse range-Doppler image construction with neural networks
(2020-06-11)The principles outlined by compressed sensing can permit a sensor to collect reduced amount of data and still reconstruct an exact outcome. This can for example be used to generate super-resolution sparse range-Doppler ... -
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 ... -
Spawning Atlantic cod (Gadus morhua L.) exposed to noise from seismic airguns do not abandon their spawning site
(2022-11-15)Seismic airgun surveys may disturb and displace fish at large ranges. If such displacement causes fish to abandon spawning grounds, reproductive success could be impacted. To investigate whether airgun sound causes cod ... -
Specification of a socket interface for a generic tactical protocol solution
(2004)This report gives a specification of a JAVA socket API (Application Protocol Interface) on top of a generic protocol solution developed for use over communication systems with low data rate. The solution may be used for ... -
Specification of functions for the Unison underwater warfare demonstrator
(2002)UNISON 2005 is a research and development program supporting the development of the next generation of combat systems for underwater warfare. The UNISON 2005 program is a co-operation between KDA, SIMRAD and FFI. The ... -
Specifying radiometric performance of hyperspectral and conventional cameras: A minimal set of independent characteristics
(2020)The radiometric performance of cameras is customarily characterized and specified in terms of component properties such as F-number and readout noise. This paper considers the camera as an integrated unit and derives ... -
Spectral characteristics of moist birch leaves and synthetic materials: experimental studies and evaluation of models
(2021-11-09)The optical depth of biomaterials and natural backgrounds varies with their environment and incoming light properties. Deciduous trees, for instance, have canopy thicknesses that vary significantly from one place to another. ... -
Spectral element benchmark simulations of natural convection in two-dimensional cavities
(2004)This report presents the results of spectral element simulations of natural convection in two-dimensional cavities. In particular, a detailed comparison is performed with the reference data recently described by Christon ...