Results 61 to 70 of about 4,358,865 (294)

Performance of GNSS Global Ionospheric Modeling Augmented by LEO Constellation

Earth and Space Science, 2020
The Low‐Earth‐Orbiting (LEO) satellite has a fast motion and thus contributes to rapid changes in satellite geometric distribution, which can effectively mitigate multipath effects and offer more available observations.
Xiaodong Ren, Xiaohong Zhang, Michael Schmidt, Zhibo Zhao, Jun Chen, Jincheng Zhang, Xingxing Li   +6 more
doaj   +1 more source

Cross-Domain Fusion Constellation Design of Communication, Navigation and Remote Sensing

Applied Sciences, 2023
Low earth orbit (LEO) mega-constellations have once again triggered a wave of space-based system construction. On the one hand, LEO communication, LEO navigation, LEO remote sensing constellations and so on are proposed.
Junxiang Qin, Xuan Li, Xiaotian Ma, Xiye Guo, Jun Yang   +4 more
doaj   +1 more source

Molecular dynamics simulations of positively selected codons in FcγRI reveal novel biochemical binding properties

FEBS Open Bio, EarlyView.
Evolutionary analysis across 32 placental mammals identified positive selection at residues H148 and W149 in the immune receptor FcγR1. Ancestral reconstruction combined with molecular dynamics simulations reveals how these mutations may influence receptor structure and dynamics, providing insight into the evolution of antibody recognition and immune ...
David A. Young, Omar Arias‐Gaguancela, Fiona Gibson, Morgan Grainger, Jodie Score, Amit Nathubhai, Mauricio Cafiero, Lee Richard Machado   +7 more
wiley   +1 more source

Towards Defect Phase Diagrams: From Research Data Management to Automated Workflows

Advanced Engineering Materials, EarlyView.
A research data management infrastructure is presented for the systematic integration of heterogeneous experimental and simulation data required for defect phase diagrams. The approach combines openBIS with a companion application for large‐object storage, automated metadata extraction, provenance tracking and federated data access, thereby supporting ...
Khalil Rejiba, Sang‐Hyeok Lee, Christina Gasper, Martina Freund, Sandra Korte‐Kerzel, Ulrich Kerzel   +5 more
wiley   +1 more source

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

Advanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan, David Bürger, Gunther Eggeler, Oleg Shchyglo, Ingo Steinbach, Muhammad Adil Ali   +5 more
wiley   +1 more source

Cost-Efficient LEO Navigation Augmentation Constellation Design under a Constrained Deployment Approach

International Journal of Aerospace Engineering, 2021
The advantages of the Low Earth Orbit (LEO) satellite include low-latency communications, shorter positioning time, higher positioning accuracy, and lower launching, building, and maintenance costs.
Jing Ren, Dan Sun, Deng Pan, Mingtao Li, Jianhua Zheng   +4 more
doaj   +1 more source

Integration of 5G Technologies in LEO Mega-Constellations

CoRR, 2017
3GPP is finalising the first release of the 5G New Radio physical layer. To cope with the demanding 5G requirements on global connectivity and large throughput, Satellite Communications might be a valuable resource to extend and complement terrestrial networks.
Alessandro Guidotti, Alessandro Vanelli-Coralli, Oltjon Kodheli, Giulio Colavolpe, Tommaso Foggi   +4 more
openaire   +2 more sources

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

Advanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik, Alexander Jelinek, Markus Alfreider, Jutta Luksch, Anton Hohenwarter, Florian Schaefer, Christian Motz, Daniel Kiener   +7 more
wiley   +1 more source

A Study of the Impact of Heterogeneous Low Earth Orbit (LEO) Constellations on Global Ionospheric Tomography Inversions

Atmosphere
The development of low earth orbit (LEO) satellites has provided the possibility to improve the accuracy of wide-area global navigation satellite system (GNSS) tomography; however, the existing LEO constellations were not designed to consider the effect ...
Yanwen Liu, Xingliang Huo, Ting Zhang, Yunbin Yuan   +3 more
doaj   +1 more source

Survey on Routing Algorithms for LEO Constellations Network

Fayoum University Journal of Engineering
The fast growth of communication technology has resulted from the desire for information globalization. Satellite communication systems, which have the benefits of extensive coverage and minimal requirements on the geographical environment as compared to
E. Elbehiry, H. TagElDien, Ahmed Fares, B. Elhalawany   +3 more
semanticscholar   +1 more source