Articles
Browse by
Recent Submissions
-
Al-Qaida in the Islamic Maghrib’s Expansion in the Sahara: New Insights from Primary Sources
(2020-09-24)Although originating in Algeria, AQIM and its allies had by 2012 become so entrenched in the Sahel that they were in de-facto control of vast swathes of territory in northern Mali. This article explains how and why GSPC/AQIM ... -
Ship-of-opportunity noise inversions for geoacoustic profiles of a layered mud-sand seabed
(2019-04-30)This paper considers the use of broadband noise from a ship-of-opportunity in statistical inference for estimating geoacoustic parameters of a layered mud-sand seabed model via trans-dimensional (trans-D) Bayesian matched-field ... -
German-Norwegian relations in security and defence? What kind of partnership?
(2021-03-17)The article contributes to the debate on European defence cooperation and integration by analysing the German–Norwegian security and defence partnership. I define this partnership as being based upon mutual interests and ... -
The Future of Jihadism in Europe: A Pessimistic View
(2016-12)This article presents a ten-year forecast for jihadism in Europe. Despite reaching historically high levels in recent years, violent Islamist activity in Europe may increase further over the long term due to four macrotrends: ... -
3-D Printed Monolithic GRIN Dielectric-Loaded Double-Ridged Horn Antennas
(2019-09-06)Monolithic integration of 3-D printed gradient index (GRIN) dielectric loading with a double-ridged rectangular horn standard gain horn (SGH) and its impact on antenna performance are demonstrated. Results show that the ... -
Predicting False Alarm Rates for High-Resolution Antisubmarine Warfare Sonars in a Cluttering Environment Prone to False Alarm Rate Inflation
(2019-09-13)Operation of high-resolution, broadband, antisubmarine warfare sonars in littoral waters is challenging, since the presence of sea mounts, underwater ridges, and other topographic features causes increased false alarm ... -
Modeling and Simulation as a Service infrastructure capabilities for discovery, composition and execution of simulation services
(2020-01-13)Modeling and Simulation as a Service (MSaaS) embodies the idea that simulations should be composed quickly for the task at hand from loosely coupled shared components, simulation services, in a cloud-based environment. ... -
The Importance of Significant Others in Preventing Extremism: The Philosophy and Practice of the Swedish Tolerance Project
(2020)This article concerns a specific educational programme to reduce recruitment to racist and extreme organizations in Sweden. The programme is called the Tolerance Project, and it functions as an elective course offered to ... -
Challenges for Risk and Security Modelling in Enterprise Architecture
(2019-11-19)From our experience cooperating with the Norwegian Armed Forces, we outline two interconnected challenges for modelling risk and security in an enterprise architecture: (1) modelling what is protected and why it is protected ... -
The subway microbiome: Seasonal dynamics and direct comparison of air and surface bacterial communities
(2019-12-19)Background Mass transit environments, such as subways, are uniquely important for transmission of microbes among humans and built environments, and for their ability to spread pathogens and impact large numbers of people. ... -
Ship source level estimation and uncertainty quantification in shallow water via Bayesian marginalization
(2020-04-17)This paper applies a non-linear Bayesian marginalization approach to ship spectral source level estimation in shallow water with unknown seabed properties and uncertain source depth. The algorithm integrates the posterior ... -
Coherent high-speed acoustic communication inside a commercial atlantic salmon pen
(2020-06-07)Fish telemetry is a potential method to monitor the well-being of farmed fish, where a reference group of fish are equipped with sensors tags that oversee their health and wirelessly transmit the data. Many fish must be ... -
Parameter selection in a fully adaptive tracking radar
(2020-04-27)A fully adaptive radar framework has been proposed in recent publications, and this paper will implement the framework for a tracking radar. A set of cost functions are developed to balance the performance cost of the track ... -
Laminar burning velocity of the dimethyl carbonate–air mixture formed by the Li-ion electrolyte solvent
(2020-08-21)If a Li-ion cell fails and the electrolyte leaks out into air, a flammable premixed gas cloud can be formed. The electrolyte combustion energy is 65–70% of the total energy content of the cell. The main objective of this ... -
Laser beam propagation through turbulence and adaptive optics for beam delivery improvement
(2015-10-08)We report results from numerical simulations of laser beam propagation through atmospheric turbulence. In particular, we study the statistical variations of the fractional beam energy hitting inside an optical aperture ... -
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 ... -
Generative Adversarial Immitation Learning for Steering an Unmanned Surface Vehicle
(2020-02)The task of obstacle avoidance using maritime vessels, such as Unmanned Surface Vehicles (USV), has traditionally been solved using specialized modules that are designed and optimized separately. However, this approach ... -
Path Planning for UGVs Based on Traversability Hybrid A*
(2021-02-01)In this letter, a new method of path planning for unmanned ground vehicles (UGVs) on terrain is developed. For UGVs moving on terrain, path traversability and collision avoidance are important factors. If traversability ... -
Variability of Gaseous Attenuation at Very Low Elevation Angle Slant Paths; Measurements and Modelling
(2020-07-08)Gaseous attenuation variability for a 3.2° elevation angle satellite link operating at 20 GHz in the Norwegian Arctic is analyzed and compared with different models. At a very low elevation link like this one, gaseous ... -
Deep temporal detection - A machine learning approach to multiple-dwell target detection
(2020)Detecting small targets, such as an Unmanned Aerial Vehicle (UAV) in high clutter and non-homogeneous environments is challenging for a radar system. Traditional Constant False Alarm Rate (CFAR) detectors have suboptimal ...