Results 41 to 50 of about 41,390 (144)

Perspectives and Emerging Trends in Plasma Catalysis: Facing the Challenge of Chemical Production Electrification

open access: yesChemCatChem, Volume 17, Issue 7, April 4, 2025.
Plasma catalysis: a key technology to electrify chemical production. Emerging trends and present gaps to pass from a research area to a key technology to develop sustainable decentralized production and face societal challenges. Emerging possibilities in modeling, new trends in reactor and electrode design, combining plasma and electro‐/photocatalysis,
Annemie Bogaerts   +3 more
wiley   +1 more source

Remotely piloted LTA vehicle for surveillance [PDF]

open access: yes, 1975
Various aspects of a remotely piloted mini-LTA vehicle for surveillance, monitoring and measurement for civilian and military applications are considered.
Brown, G. J.   +2 more
core   +1 more source

A dataset of tracked mesoscale precipitation systems in the tropics

open access: yesGeoscience Data Journal, Volume 12, Issue 2, April 2025.
Mesoscale Convective Systems (MCSs) are often a challenge to identify, track, and quantify. From the NASA Integrated Multi‐satellitE Retrievals for the Global Precipitation Mission (IMERG), we generated a dataset of tropical Tracked IMERG Mesoscale Precipitation Systems (TIMPS).
James Russell   +5 more
wiley   +1 more source

Inferring 3‐D Rheology of Low‐Viscosity Zone Around Quaternary Volcanoes of NE Japan From Postseismic Deformation of the 2011 Tohoku‐Oki Earthquake

open access: yesJournal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract Several geological and geophysical studies suggest the small‐scale presence of low viscosity zone (i.e., LVZ) beneath the Quaternary volcanoes of northeastern Japan. Before the 2011 Mw9.0 Tohoku‐oki earthquake, scientists hypothesized that these LVZs cause localized crustal deformations around the Quaternary volcanoes. However, the deformation‐
Sambuddha Dhar   +2 more
wiley   +1 more source

Digital constant‐envelope modulation scheme for radar using multicarrier OFDM signals

open access: yesIET Signal Processing, 2017
Multicarrier signals using orthogonal frequency division multiplexing (OFDM) bring many advantages to radar such as low probability of intercept, improved target detection performance, optimisation of both radar transmitter and receiver etc. A major drawback of multicarrier OFDM signals is their high peak-to-mean envelope power ratio, which reduces the
Fu Wei, Defu Jiang, Qian Rong
openaire   +1 more source

Enhancing Debris Flow Warning via Machine Learning Feature Reduction and Model Selection

open access: yesJournal of Geophysical Research: Earth Surface, Volume 130, Issue 4, April 2025.
Abstract The advent of machine learning has significantly improved the accuracy of identifying mass movements through the seismic waves they generate, making it possible to implement real‐time early warning systems for debris flows. However, we lack a profound understanding of the effective seismic features and the limitations of different machine ...
Qi Zhou   +6 more
wiley   +1 more source

Functional Regression for Space‐Time Prediction of Precipitation‐Induced Shallow Landslides in South Tyrol, Italy

open access: yesJournal of Geophysical Research: Earth Surface, Volume 130, Issue 4, April 2025.
Abstract Landslides are geomorphic hazards in mountainous terrains across the globe, driven by a complex interplay of static and dynamic controls. Data‐driven approaches have been employed to assess landslide occurrence at regional scales by analyzing the spatial aspects and time‐varying conditions separately.
Mateo Moreno   +8 more
wiley   +1 more source

Empirical Comparison of Chirp and Multitones on Experimental UWB Software Defined Radar Prototype [PDF]

open access: yes, 2012
This paper proposes and tests an approach for an unbiased study of radar waveforms' performances. Using the ultrawide band software defined radar prototype, the performances of Chirp and Multitones are compared in range profile and detection range.
Denoulet, J.   +3 more
core  

Three dimensional scattering center imaging techniques [PDF]

open access: yes
Two methods to image scattering centers in 3-D are presented. The first method uses 2-D images generated from Inverse Synthetic Aperture Radar (ISAR) measurements taken by two vertically offset antennas.
Burnside, W. D., Younger, P. R.
core   +1 more source

Flight testing a V/STOL aircraft to identify a full-envelope aerodynamic model [PDF]

open access: yes
Flight-test techniques are being used to generate a data base for identification of a full-envelope aerodynamic model of a V/STOL fighter aircraft, the YAV-8B Harrier.
Bach, Ralph E., Jr., Mcnally, B. David
core   +1 more source

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