Browsing Articles by Issue Date
Now showing items 461-480 of 843
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Robust eye-safe pulsed fiber laser source for 3D ladar applications
(2017)We present a pulsed all-fiber Er/Yb-doped master oscillator power amplifier at 1.55 μm wavelength. In a simple two-stage amplifier design, the source delivers 140 μJ pulses at 25 kHz and 50 kHz pulse repetition frequency, ... -
Combination of stereo SAR and InSAR for DEM generation using TanDEM-X spotlight data
(2017)The objective of this work is to generate accurate digital elevation models (DEMs) from synthetic aperture radar (SAR) interferograms using the spotlight and staring spotlight modes during the TanDEM-X (TDX) science phase. ... -
Arctic Maritime Surveillance With Sentinel-1 Data Using a Norwegian Collaborative Ground Segment
(2017)The Sentinel-1A and Sentinel-1B C-band Synthetic Aperture Radar (SAR) satellites provide data for European Union's Copernicus program. Norway uses SAR satellites operationally to monitor Norway's maritime areas of interest. ... -
Statistics-based filtering for low signal-to-noise ratios, applied to rocket plume imaging
(2017)Extracting information from low signal to noise ratio images poses significant challenges. Noise makes extracting spatial features difficult, in particular if extraction of both large, smooth features at the same time as ... -
Planning and conducting crisis management exercises for decision-making: the do’s and don’ts
(2017)Organizations exercise to strengthen their crisis management capability, to identify possible improvements to plans, and to develop necessary skills. Taking part in exercises is one way leaders can test their decision-making ... -
A Reactive Collision Avoidance Algorithm for Vehicles withUnderactuated Dynamics
(2017)This paper presents a reactive collision avoidance algorithm, which avoids both static and moving obstacles by keeping a constant avoidance angle between the vehicle velocity vector and the obstacle. In particular, we ... -
Stochastic space interval as a link between quantum randomness and macroscopic randomness?
(2017)For many stochastic phenomena, we observe statistical distributions that have fat-tails and high-peaks compared to the Gaussian distribution. In this paper, we will explain how observable statistical distributions in the ... -
Thirty years after its foundation – where is al-Qaida going?
(2017)This article presents a framework for understanding al-Qaida, based on a new reading of its thirty-year history. Al-Qaida today is commonly labelled a ‘global insurgency’ or ‘global franchise.’ However, these labels are ... -
The defence industry as a locomotive for technological renewal in Russia: are the conditions in place?
(2017)This article examines the extent to which the conditions for successful military to civilian technological spin-offs are in place in Russia. This is important because Russian authorities use the potential for such spin-offs ... -
Islamic State and Technology – A Literature Review
(2017)This article offers an overview of the literature on how the Islamic State has used different technologies, primarily within the fields of drone technology, CBRN and communication technology. The author argues that the ... -
Ansar al-Sharia in Libya: An Enduring Threat
(2017)Ansar al-Sharia in Libya (ASL) is one of the most powerful jihadi groups in Libya and it might, in fact, represent a more significant long-term threat than IS’ provinces in Libya. However, there are few recent studies of ... -
CEP-stable few-cycle pulses with more than 190 μJ of energy at 100 kHz from a noncollinear optical parametric amplifier
(2017)Noncollinear optical parametric amplifiers (NOPAs) have become the leading technique for the amplification of carrier-envelope phase (CEP)-stable, few-cycle pulses at high repetition rate and high average power. In this ... -
Dendritic flux avalanches in a superconducting MgB2 tape
(2017)Tapes of MgB2 with high critical current have a significant technological potential, but can experience operational breakdown due to thermomagnetic instabilities. Such events are routinely registered by magnetisation ... -
DETOUR trials: The mission and its results
(2017)In this paper DMPAR Evaluation Trials for Operationally Upgraded Radar (DETOUR) and their results for a selected scenario are described. The DETOUR trials were conducted by the SET-195 research task group (RTG) under an ... -
Compressed Sensing with Interleaving Slow-Time Pulses and Hybrid Sparse Image Reconstruction
(2017)This paper explores a type of hybrid sparse reconstruction technique for modern multifunction task scheduling radars and on following range-Doppler plots. A compressed sensing (CS) framework is devised to emit and then ... -
LTE for Military Communication - Business Models and Vulnerabilities
(2017)This document outlines security issues concerning military use of LTE. It illustrates implications of different business models, and outlines vulnerabilities that decision makers should be aware of in order to protect the ... -
From food defence to food supply chain integrity
(2017)Purpose Consumer confidence in the European food industry has been shaken by a number of recent scandals due to food fraud and accidental contamination, reminding the authors that deliberate incidents can occur. Food ... -
Sonar scattering from the sea bottom near the Norwegian coast
(2017)High false alarm rates on active sonar systems in shallow waters is a well known problem which may be a limiting factor for the sonar performance. One way to reduce the false alarm rate is through supervised learning and ... -
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 ...