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Now showing items 111-120 of 120
Modeling potential masking of echolocating sperm whales exposed to continuous 1-2 kHz naval sonar
(2021-04-30)
Modern active sonar systems can (almost) continuously transmit and receive sound, which can lead to more masking of important sounds for marine mammals than conventional pulsed sonar systems transmitting at a much lower ...
Discrete Fourier Transform with Neural Networks
(2021-12-10)
The discrete Fourier transform is an important computational tool to retrieve the frequency distribution of a sampled signal. Recent years have also witnessed considerable research activity in neural networks as a mean to ...
Ultrafast Pulse Compression in Bulk with > 20 Times Spectral Broadening Factor from a Single Stage
(2021-11-01)
We introduce the combination of multi-pass cell and multi-plate spectral broadening. We demonstrate the compression of 110-μJ pulses from 900-fs to 60-fs in a single stage and report broadening to 38-fs transform-limit by ...
3D Rendering of Shipwrecks from Synthetic Aperture Sonar
(2021-10-25)
Synthetic aperture sonar (SAS) bathymetric mapping provides centimeter-scale horizontal resolution of the
seafloor. Typically, SAS data has been visualized as 2D images or gridded 2.5D surfaces, but it can also be
plotted ...
NATO Core Services profiling for Hybrid Tactical Networks -Results and Recommendations
(2021-07-21)
The NATO Research Task Group IST-150 "NATO Core Services profiling for Hybrid Tactical Networks" had Federated Mission Networking (FMN) as the main context and motivation for its work. IST-150 intended to investigate Core ...
A Status Update on Quantum Safe Cryptography
(2021-07-20)
There is an ongoing effort to standardize asymmetric cryptography that should not be attackable by a quantum computer. The process is now into its final rounds. From 69 initial submissions from academia and industry, a ...
Small-scale fire performance assessment of intumescent coatings on metal tubes containing ammonium nitrate. A stepping-stone towards their application as a fire safety measure on road transportation tanks?
(2021-11)
Ammonium nitrate is used in vast amounts globally, first and foremost as a component of fertilizers and explosive formulations. This usage necessitates its transportation which, as for most hazardous materials, involves ...
The Motivation to Serve in the Military Among Swedish and Norwegian Soldiers. A Comparative Study
(2020)
The geographic location of Sweden and Norway, combined with a deteriorated security situation in
the Nordic Region and a renewed focus on national defense, makes the development of their armed forces
a hot topic. In ...
Understanding the Threat of Nuclear, Biological and Chemical Warfare
(2021)
Weapons of mass destruction are not merely Cold War relics. Recent years have seen the use of biological and chemical agents in the United States, Syria, Malaysia and the United Kingdom. The faltering of strategic arms ...
Comparison of simulated and measured ISAR images flow of a ship at sea
(2021-07-02)
The aim of this work is to simulate a flow of ISAR images for a ship at sea seen from an airborne radar, in rigorously the same configuration as it has been measured by a real SAR using the recorded motion data of both ...