Browsing Articles by Title
Now showing items 829-848 of 860
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Validation of replay-based underwater acoustic communication channel simulation
(2013)This paper discusses validation methods for underwater acoustic communication channel simulators, and validates direct and stochastic replay of underwater acoustic communication channels as implemented in a channel simulator ... -
Valproate is neuroprotective against malonate toxicity in rat striatum: an association with augmentation of high-affinity glutamate uptake
(2004)The antiepileptic drug valproate (VPA) may be neuroprotective. We treated rats with VPA for 14 days (300 mg/kg twice daily) before intrastriatal injection of 1.5 μmol (1 M) of the succinate dehydrogenase inhibitor malonate. ... -
Variability in modelled sonar and target depth distributions
(2024-06-26)When attempting to detect a reflecting target using active sonar, the relationship between the sensor and target depths is of key importance. This is due to the non-uniform vertical sound speed profile in the water column, ... -
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 ... -
Vehicle Safety of the Velocity Obstacle Algorithm
(2021-01)This paper presents a mathematical analysis of the velocity obstacle algorithm applied to a nonholonomic vehicle for avoiding a moving obstacle in the plane. The velocity obstacle algorithm can be used for local navigation ... -
Velgeren som tilskuer: "Valgbarisme" i amerikanske presidentvalg
(2021)Hensyn til valgbarhet har i kraft av det amerikanske politiske systemets virkemåte bestandig vært et moment i presidentvalg. I nominasjonskampen i 2020 har dette hensynet imidlertid vært viktigere for et flertall av velgere ... -
VErsatile RAdar – RFSoC based radar demonstrator for multiple applications
(2022-10-04)The Norwegian Defence Research Establishment (FFI) VeRa (Versatile Radar) is a radar demonstrator for multiple applications based on the 1st generation Xilinx RF System on Chip (RFSoC). This paper describes the hardware ... -
Very-High-Frequency Single-Input–Multiple-Output Acoustic Communication in Shallow Water
(2018)Very-high-frequency (VHF) underwater acoustic communication is a relatively unexplored terrain, but its importance is expected to increase with the growing demands for larger bandwidths and higher data rates. Knowledge of ... -
Vibrational Corrections to NMR Spin-Spin Coupling Constants from Relativistic Four-Component DFT Calculations
(2022-09-22)Zero-point vibrational (ZPV) corrections to the nuclear spin–spin coupling constants have been calculated using four-component Dirac–Kohn–Sham DFT for H2X (where X = O, S, Se, Te, Po), XH3 (where X = N, P, As, Sb, Bi), and ... -
War and the Willingness to Resist and Fight in Ukraine
(2023-12-05)This study explores the effects of Russia's use of military force on the Ukrainian willingness to fight and resist. We find assumptions from the theoretical literature on the willingness to fight of limited relevance. ... -
War in Europe, but Still Low Tension in the High North? An Analysis of Norwegian Mitigation Strategies
(2024)Russia’s invasion of Ukraine has created the most precarious security situation in Europe, including the High North, since the Second World War. This article studies how Norway manages High North security dilemmas in the ... -
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 ... -
Wargaming Evolved: Methodology and Best Practices for Simulation-Supported Wargaming
(2019-12-12)When developing and assessing future force structures, wargaming is a key activity for better understanding the strengths and weaknesses of the force structures. Today simulation systems let us create synthetic environments ... -
Wargaming for the Purpose of Knowledge Development: Lessons Learned from Studying Allied Courses Of Action
(2022-09-19)We present a series of four wargames intended to improve our ability to analyze the alliance aspect of Norwegian military operations. We discuss the objectives, the set-up, and the lessons learned. The wargames proved to ... -
The Watermark benchmark for underwater acoustic modulation schemes
(2017)Watermark is a freely available benchmark for physical-layer schemes for underwater acoustic communications. It allows researchers to test and compare algorithms for the physical layer under realistic and reproducible ... -
A wavelet schrinkage approach to detect candidate point scatterers in synthetic aperture sonar images for resolution estimation
(2023)Autonomous Underwater Vehicles (AUVs) that are equipped with side-looking synthetic aperture sonar (SAS) have become a popular asset for efficient high resolution imaging and mapping of the seafloor. There are situations ... -
A weakening transatlantic relationship? Redefining the EU-US security and defence cooperation
(2022-05-18)The aim of this article is to discuss how a weakening transatlantic relationship influences European defence cooperation and integration. It also asks how these observed patterns of weakening EU–US relations can be explained ... -
Weeping in Modern Jihadi Groups
(2020-09-14)This article, using a wide range of primary sources, describes the practice of weeping (bukā) in contemporary jihadi groups. It shows that weeping is widespread and encouraged in militant Islamist groups such as al-Qaida ...