Browsing Articles by Issue Date
Now showing items 761-780 of 843
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How extending the kinematic model affects path following in off-road terrain for differential drive UGVs
(2022-05-31)Traversal in off-road conditions for Unmanned Ground Vehicles is highly relevant for defence applications, with an increasing amount of research being put into the field. A central part of the autonomous traversal is path ... -
Challenges of Labelling Unknown Seabed Munition Dumpsites from Acoustic and Optical Surveys: A Case Study at Skagerrak
(2022-05-31)The disposal of unexploded ordnance (UXOs) at sea is a global problem. The mapping and remediation of historic UXOs can be assisted by autonomous underwater vehicles (AUVs) carrying sensor payloads such as synthetic aperture ... -
Glioblastoma microenvironment contains multiple hormonal and non-hormonal growth-stimulating factors
(2022-06-04)Background The growth of malignant tumors is influenced by their microenvironment. Glioblastoma, an aggressive primary brain tumor, may have cysts containing fluid that represents the tumor microenvironment. The aim of ... -
Towards Using Reinforcement Learning for Autonomous Docking of Unmanned Surface Vehicles
(2022-06-10)Providing full autonomy to Unmanned Surface Vehicles (USV) is a challenging goal to achieve. Autonomous docking is a subtask that is particularly difficult. The vessel has to distinguish between obstacles and the dock, and ... -
Military Muscle-Flexing as Interstate Communication: Russian NOTAM Warnings off the Coast of Norway, 2015–2021
(2022-06-14)When, where, and why does Russia issue warnings about missile launches and other potentially dangerous military activities in international waters and airspace west and north of Norway? Drawing on information derived from ... -
Segmentation of PMSE data using random forests
(2022-06-22)EISCAT VHF radar data are used for observing, monitoring, and understanding Earth’s upper atmosphere. This paper presents an approach to segment Polar Mesospheric Summer Echoes (PMSE) from datasets obtained from EISCAT VHF ... -
Population Based Routing in LEO Satellite Networks
(2022-06-26)Packet switching in a Low Earth Orbit (LEO) satellite network may calculate the best traffic route through the less populated areas of the planet, in order to avoid relaying through the busiest satellites. A number of ideas ... -
Using the Pauli Scattering Mechanisms for Analysis of Polarimetric SAR Images from RADARSAT Constellation and TanDEM-X Missions
(2022-07-13)This article describes techniques for extraction of information in polarimetric images from RADARSAT constellation mission (RCM) and TanDEM-X (TDX) and TerraSAR-X (TSX) satellites. Using the boundary conditions of Maxwell's ... -
Pro-inflammatory cytokines in cystic glioblastoma: A quantitative study with a comparison with bacterial brain abscesses. With an MRI investigation of displacement and destruction of the brain tissue surrounding a glioblastoma
(2022-07-29)Cystic glioblastomas are aggressive primary brain tumors that may both destroy and displace the surrounding brain tissue as they grow. The mechanisms underlying these tumors’ destructive effect could include exposure of ... -
Colliding Pulse Mode Locking and Nonequilibrium Carrier Dynamics within Vertical External-Cavity Surface-Emitting Lasers
(2022-08-02)The complex nonlinear dynamics of colliding counterpropagating ultrashort laser pulses circulating in a vertical external-cavity surface-emitting ring laser cavity are captured by a first-principles quantum-mechanical ... -
Multiteam Systems Handling Time-Sensitive Targets: Developing Situation Awareness in Distributed and Co-located Settings
(2022-08-04)There is an increasing interest in how to organize operations carried out by multiteam systems (MTS). Large MTS typically operate with a dedicated integration team, responsible for coordinating the operation. We report a ... -
A Computational Protocol for Vibrational Circular Dichroism Spectra of Cyclic Oligopeptides
(2022-08-05)Cyclic peptides are a promising class of compounds for next-generation antibiotics as they may provide new ways of limiting antibiotic resistance development. Although their cyclic structure will introduce some rigidity, ... -
Correlations between sound speed and density in seabed sediment cores collected in Norwegian waters
(2022-08-08)In modelling of underwater sound propagation, knowledge about the seabed’s acoustic properties is essential, especially sound speed and density. These two properties are highly correlated, and standard empirical regressions ... -
Wind- and tidal driven ambient noise in seasonallyice-covered waters north of the Svalbard archipelago
(2022-08-24)This paper presents analysis of a 1-year (2018–2019) recording of ambient noise (40–2000 Hz) at a seasonally ice-covered location on the continental slope between the Svalbard archipelago and the Nansen Basin, northeast ... -
Generalization and stabilization of exact scattering solutions for spherical symmetric scatterers
(2022-08-29)In a previous work the authors described a fast high-fidelity computer model for acoustic scattering from multi-layered elastic spheres. This work is now extended with a scaling strategy significantly mitigating the problem ... -
Modeling the effect of random roughness on synthetic aperture sonar image statistics
(2022-09-02)A model has been developed to predict the effect of random seafloor roughness on synthetic aperture sonar (SAS) image statistics, based on the composite roughness approximation–a physical scattering model. The continuous ... -
Tribal engagement strategies in the Islamic Emirate of Azawad
(2022-09-02)The Tuareg uprising in northern Mali in 2012 culminated in the establishment of the Islamic Emirate of Azawad, a proto-state run jointly by Tuareg Islamists in Ansar Dine and foreign jihadists with connections to al-Qaida ... -
Modelled sonar and target depth distributions for active sonar operations in realistic environments
(2022-09-08)Target detection performance of mid-frequency active sonars depends heavily on both sonar and target depth. For a given target depth, a sonar performance model may help predict a sonar depth that maximizes the detection ... -
SARS-CoV-2 in the Air Surrounding Patients during Nebulizer Therapy
(2022-09-17)Nebulizer therapy is commonly used for patients with obstructive pulmonary disease or acute pulmonary infections with signs of obstruction. It is considered a “potential aerosol-generating procedure,” and the risk of disease ... -
Wargaming Dos and Don’ts – Eight Lessons for Planning and Conducting Wargames
(2022-09-19)Since 2015, there has been a resurgence in the use of wargaming in NATO states. But countries with smaller wargaming communities have not seen a corresponding revitalization of the technique. If the interest is there, the ...