Results 81 to 90 of about 3,539 (230)
Advanced Science, EarlyView.Adult stem cell therapy requires more than high in vitro potency. This review proposes a systems framework in which cell‐intrinsic programs, instructive microenvironmental cues, and pre‐/post‐delivery engineering are co‐designed under standardized translational rules.
Soo‐Rim Kim +2 more
wiley +1 more source
Spectral Clustering-Based Controller Placement Approach in Low-Earth-Orbit Satellite Networks
Space: Science & TechnologyBecause of their low latency, cost-effective construction, and rapid product updating, low-Earth-orbit (LEO) satellite networks have become an important part of the space infrastructure system.
Shuotong Wei +5 more
doaj +1 more source
PreHO: Predictive Handover for LEO Satellite Networks
CoRRLow-Earth Orbit (LEO) Satellite Networks (LSNs) offer a promising solution for extending connectivity to areas not covered by Terrestrial Networks (TNs). However, the rapid movement, broad coverage, and high communication latency of LEO satellites pose significant challenges to conventional handover mechanisms, resulting in unacceptable signaling ...
Xingqiu He +3 more
openaire +2 more sources
Simulation of a NASA LEO Satellite Hybrid Network
, 1998 Various issues associated with "Simulation of a NASA LEO Satellite Hybrid Network" are presented in viewgraph form. Specific topics include: 1) Objective of the investigation; 2) Satellite orbit description and included nodes; 3) TCP and FTP simulation ...
Konangi, Vijaya K. +2 more
core
A Novel Analytical Model for LEO and MEO Satellite Networks based on Cox Point Processes
International audienceThis work develops an analytical framework for downlink low Earth orbit (LEO) or medium Earth orbit (MEO) satellite communications, leveraging tools from stochastic geometry.
Baccelli, François, Choi, Chang-Sik
core +1 more source
Advanced Science, EarlyView.We develop vacancy‐rich Co9S6.29 precatalysts formed via ultrafine MnS‐induced lattice distortion in mesoporous S‐doped N‐rich hollow carbon nanotubes (CM@SNHCTs). This CM@SNHCT precatalyst is reconstructed into catalytically‐active cathode phases that enable efficient oxygen reduction/evolution reactions (ORR/OER) through dynamic O‐vacancy formation ...
Debarani Devi Khumujam +10 more
wiley +1 more source
Visibility of LEO satellites under different ground network distributions [PDF]
, 2022 The Low Earth Orbit (LEO) satellites have shown various benefits in augmenting the Positioning, Navigation and Timing (PNT) service based on Global Navigation Satellite Systems (GNSSs).
Wang, Kan, El-Mowafy, Ahmed, Yang, Xuhai
core
Advanced Electronic Materials, EarlyView.Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley +1 more source
Research on Architecture of LEO Satellite Internet of Things and Key Technologies
天地一体化信息网络, 2021 First, we analyzed the composition and demand characteristics of LEO satellite IoTs, and designed an architecture of LEO satellite IoTs.Second, to extracted characteristics of electromagnetic environment and channel, we studied electromagnetic ...
Xiaojin DING +4 more
doaj +2 more sources
Routing In Leo-Based Satellite Networks
, 1999 Several strategies have been proposed for routing in a low earth orbit (LEO) satellite system. Some of them are based on the Internet Protocol (IP) and a few on asynchronous transfer mode (ATM) switching.
Hosame Abu-amara +2 more
core