Results 191 to 200 of about 186,008 (265)
International Journal of Satellite Communications and Networking, Volume 43, Issue 3, Page 210-228, May/June 2025.ABSTRACT Optical satellite communications provide high‐data rates with compact and power efficient payloads that can solve the bottlenecks of RF technologies. Photonic integrated circuits have the potential to reduce the cost, size, weight, and power consumption of satellite laser communications terminals, by integrating all the required photonic ...
Giulio Terrasanta +4 more
wiley +1 more source
Update on the German and Australasian Optical Ground Station Networks
International Journal of Satellite Communications and Networking, Volume 43, Issue 3, Page 147-163, May/June 2025.ABSTRACT Networks of ground stations designed to transmit and receive at visible and infra‐red wavelengths through the atmosphere offer an opportunity to provide on‐demand, high‐bandwidth, secure communications with spacecraft in Earth orbit and beyond. This work describes the operation and activities of current free space optical communications (FSOC)
Nicholas J. Rattenbury +24 more
wiley +1 more source
Strategic Management Journal, Volume 46, Issue 6, Page 1494-1522, June 2025.Abstract Research Summary This article analyzes how innovation country‐of‐origin impacts the decisions of multinational corporations (MNCs) to defend their patents against infringement in foreign countries. We argue that MNCs have stronger incentives to defend their locally generated innovations (in foreign countries) than their home‐ or third‐country ...
Heather Berry, Róisín Donnelly
wiley +1 more source
Recent progress in understanding Mars' unusual annular polar vortices
Weather, Volume 80, Issue 6, Page 187-193, June 2025.A key feature in polar atmospheric dynamics, polar vortices are found on many planets, with those on Mars the most studied beyond Earth. We review current understanding of the physical processes that give the Martian polar vortices their barotropically unstable annular structure, with latent heating from condensation of atmospheric CO2 found to be the ...
Stephen Hughes +3 more
wiley +1 more source
Weak Supervision: A Survey on Predictive Maintenance
WIREs Data Mining and Knowledge Discovery, Volume 15, Issue 2, June 2025.The authors conduct a comprehensive examination of Weakly Supervised Learning for Predictive Maintenance, the survey discusses the challenges and identifies open research lines. ABSTRACT The maintenance advancements achieved in Industry 4.0 generate large amounts of data, necessitating complete, accurate, and precise labels for training datasets to ...
Antonio M. Martínez‐Heredia +1 more
wiley +1 more source
Protection of spacecraft from meteoroids and orbital debris
, 1986 A.P. Fraas
openalex +1 more source
Predictions of Equatorial Vertical Plasma Drift Using TEC Data and a Neural Network Model
Earth and Space Science, Volume 12, Issue 6, June 2025.Abstract Vertical plasma drift, vz, plays a key role in the dynamics, morphology, and space weather effects of the equatorial and low latitude ionosphere. Modeling the drift has been an on‐going effort for climatology‐based prediction. To address daily prediction, the Vertical drIfts: Predicting Equatorial ionospheRic dynamics (VIPER) model has been ...
S. A. Reddy +4 more
wiley +1 more source
Earth and Space Science, Volume 12, Issue 6, June 2025.Abstract The findings from the Second Earth Orientation Parameters Prediction Comparison Campaign (2nd EOP PCC) suggest that integrating effective angular momentum (EAM) is vital for enhancing the accuracy of polar motion (PM) predictions. Building on Dill et al.
Wei Miao +3 more
wiley +1 more source
The Radio Wave Polarization of Saturn Lightning Observed by Cassini
Journal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.Abstract We investigate the polarization of the radio waves emitted by lightning in Saturn's atmosphere, which are referred to as SEDs for Saturn Electrostatic Discharges. Using the complete SED data set retrieved by Cassini's RPWS (Radio and Plasma Wave Science) instrument we found that the circular polarization of SEDs below a frequency of 2 MHz ...
G. Fischer +4 more
wiley +1 more source