Articles: Recent submissions
Now showing items 621-640 of 843
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Data loss prevention based on text classification in controlled environments
(2016)Loss of sensitive data is a common problem with potentially severe consequences. By categorizing documents according to their sensitivity, security controls can be performed based on this classification. However, errors ... -
European defence research in crisis? The way towards strategic autonomy
(2016)Defence research, in the form of both research and development (R&D) and research and technology (R&T), are important factors in achieving long-term European strategic autonomy. The present paper analyses this debate from ... -
24 Hour Test of a Fuel Cell System for an Autonomous Underwater Vehicle
(2016)The Norwegian Defence Research Establishment (FFI) has a long experience with power sources for autonomous underwater vehicles (AUVs). FFI has designed and built a power supply system based on a water-cooled and air-supplied ... -
FESTER: a propagation experiment, overview and first results
(2016)A long term field trial called FESTER (First European South African Transmission Experiment) has been conducted by an international collaboration of research organizations during the course of almost one year at False Bay, ... -
The FESTER field trial
(2016)An overview is given of the First European – South African Transmission ExpeRiment (FESTER), which took place in South Africa, over the False Bay area, centered around Simon’s Town. The experiment lasted from April 2015 ... -
Terahertz imaging of composite materials in reflection and transmission mode with a time-domain spectroscopy system
(2016)A fiber-coupled Terahertz time domain spectroscopy (THz-TDS) system based on photoconductive antennas, pumped by a 100-fs fiber laser, has been used to characterize materials in transmission and reflection mode. THz images ... -
Optical limiting properties of carbon disulfide at 2.05μm wavelength
(2016)Several types of infrared sensors are based on sensitive focal plane arrays. In such sensors, the intensity will typically increase by a factor ~107 at the focal plane, compared to the intensity of the incoming radiation. ... -
Compact multispectral multi-camera imaging system for small UAVs
(2016)Cameras with filters in the focal plane provide the most compact solution for multispectral imaging. A small UAV can carry multiple such cameras, providing large area coverage rate at high spatial resolution. We investigate ... -
Measurements of high-frequency acoustic scattering from glacially eroded rock outcrops
(2016)Measurements of acoustic backscattering from glacially eroded rock outcrops were made off the coast of Sandefjord, Norway using a high-frequency synthetic aperture sonar (SAS) system. A method by which scattering strength ... -
Disruptive coloration in woodland camouflage: evaluation of camouflage effectiveness due to minor disruptive patches
(2016)We present results from an observer based photosimulation study of generic camouflage patterns, intended for military uniforms, where three near-identical patterns have been compared. All the patterns were prepared with ... -
Jihadism in Norway: a Typology of Militant Networks in a Peripheral European Country
(2016)Jihadism in Norway has witnessed a huge shift from consisting primarily of foreign ethnically homogenous networks with a low capacity for mobilization, to the current situation where a loose country-wide network of domestic ... -
Biological significance of sperm whale responses to sonar: Comparison with anti-predator responses
(2016)A key issue when investigating effects of anthropogenic noise on cetacean behavior is to identify the biological significance of the responses. Predator presence can be considered a natural high-level disturbance stimulus ... -
Why Putin went to war: ideology, interests and decision-making in the Russian use of force in Crimea and Donbas
(2016)Russia’s 2014 annexation of Crimea, and the country’s prominent role in instigating and supporting an anti-Kiev rebellion in Donbas, surprised the world. This study seeks to explain Russian behaviour in these two cases. ... -
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 ... -
Protecting our food: Can standard food safety analysis detect adulteration of food products with selected chemical agents?
(2016)The food we eat and water we drink is routinely tested for a range of biological and chemical contaminants, which can be hazardous to human health, as part of food safety legislative requirements. The vulnerability of the ... -
Low-Complexity Adaptive Sonar Imaging
(2016)We have studied the low-complexity adaptive (LCA) beamformer in active sonar imaging. LCA can be viewed as either a simplification of the minimum variance distortionless response (MVDR) beamformer, or as an adaptive extension ... -
Integral Line-of-Sight Guidance of Underwater Vehicles Without Neutral Buoyancy
(2016)This paper analyzes an integral line-of-sight guidance law applied to an underac-tuated underwater vehicle. The vehicle is rigorously modeled in 5 degrees of freedom using physical principles, and it is taken into account ... -
Accumulation of lead (Pb) in brown trout (Salmo trutta) from a lake downstream a former shooting range
(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 ... -
Antenna Processing Optimization for a Colocated MIMO Radar
(2016)In a practical colocated MIMO radar design case, there will often not be a free choice of locations for single element antennas. Antenna parts may be available as rectangular arrays of antenna elements located on tiles, ... -
Risk Assessment of Sea Dumped Conventional Munitions
(2016)Energetic compounds from dumped ammunition are toxic to aquatic organisms. Leakage of ammunition residues will occur when the bombshells are broken and the energetic compounds come into contact with water. The munitions ...