Results 61 to 70 of about 869,960 (293)

Airworthiness analysis of low earth orbit satellite communication technology for UAV application

Dianxin kexue, 2023
With the rapid development of unmanned aerial vehicle (UAV) and low earth orbit (LEO) satellite technology, the integrated network consisted of the space, air, ground and sea has promoted the wide development of Internet of remote things (IoRT) on the ...
Yaoyu HE, Chao ZHANG
doaj   +2 more sources

Satellite Selection Strategy and Method for Signals of Opportunity Navigation and Positioning with LEO Communication Satellites

Sensors
Experts and scholars from various nations have proposed studying low Earth orbit (LEO) satellite signals as the space-based signals of opportunity (SOPs) for navigation and positioning.
Yanhua Tao, Yang Guo, Shaobo Wang, Chuanqiang Yu, Zimo Zhu   +4 more
doaj   +1 more source

Programming Neuromorphic Plasticity Through Ionic and Electronic Coupling in Organic Electrochemical Transistors

Advanced Functional Materials, EarlyView.
Neuromorphic plasticity in OECTs is governed by the post‐stimulus evolution of coupled ionic and electronic states. Semiconductor chemistry and morphology, electrolyte composition and interfaces, and device architecture regulate ion injection, transport, confinement, and release, shifting responses from rapidly relaxing STP to metastable memory and ...
Inho Lee, Hyoik Jang, Ji Hwan Kim, Jonghyun Won, Namhee Kim, Wonseok Shin, Giwon Lee, Eunho Lee, Daegun Kim, Sungjun Park   +9 more
wiley   +1 more source

LEO Satellite Access Network (LEO-SAN) Towards 6G: Challenges and Approaches

, 2022
With the rapid development of satellite communication technologies, the space-based access network has been envisioned as a promising complementary part of the future 6G network.
Xiao, Zhenyu, Yang, Junyi, Xia, Xiang-Gen, Mao, Tianqi, Zhang, Rui, Xu, Chong, Han, Zhu   +6 more
core  

On Channel Sharing Policies in LEO Mobile Satellite Systems [PDF]

, 2018
We consider a low earth orbit (LEO) mobile satellite system with "satellite-fixed" cells that accommodates new and handover calls of different service-classes. We provide an analytical framework for the efficient calculation of call blocking and handover
Moscholios, Ioannis, Vasilakis, Vasileios, Sagias, Nikos, Logothetis, Michael, Ioannis D. Moscholios, Michael D. Logothetis, Nikos C. Sagias, Vassilios G. Vassilakis   +7 more
core   +1 more source

How the Porous Transport Layer Dictates Membrane Electrode Assembly Performance of IrO2 Catalysts

Advanced Functional Materials, EarlyView.
The Schottky barrier formed at the catalyst | PTL interface critically governs both the initial performance and long‐term durability of the PEMWE, and its magnitude is dictated by the catalyst's work function. This limitation can be resolved by combining a rutile IrO2 core for efficient electron transfer with an amorphous IrOx shell for high surface ...
Hyeseong Jeon, Seunghee Han, Jonghyeon Park, Sujin Park, Wonjae Lee, Jihan Kim, Hyunjoo Lee   +6 more
wiley   +1 more source

Overview of LEO satellite networking communication technology for direct-to-phone connectivity

Zhongguo kongjian kexue jishu
To overcome the limitations of traditional terrestrial communication coverage and establish seamless, all-time, all-domain connectivity capabilities through direct-to-phone connection of integrated space-ground services, this study conducts a systematic ...
LI Jingling , WANG Xianyu, ZHEN Li, MENG Qingzhi, LIANG Wei, MU Tong, CUI Tao, LI Qian, CUI Wanzhao   +8 more
doaj   +1 more source

Democratizing LEO Satellite Network Measurement

ACM SIGMETRICS Performance Evaluation Review
Low Earth Orbit (LEO) satellite networks are quickly gaining traction with promises of impressively low latency, high bandwidth, and global reach. However, the research community knows relatively little about their operation and performance in practice. The obscurity is largely due to the high barrier of entry for measuring LEO networks, which requires
Liz Izhikevich, Manda Tran, Katherine Izhikevich, Gautam Akiwate, Zakir Durumeric   +4 more
openaire   +3 more sources

Multiservice on-demand routing in LEO satellite networks [PDF]

IEEE Transactions on Wireless Communications, 2009
In this paper, a distributed on-demand routing protocol for Low Earth Orbit (LEO) satellite systems, named multiservice on-demand routing (MOR), is proposed and evaluated. The proposed protocol adjusts the routing procedure to the QoS requirements of different traffic classes.
Karapantazis, S., Papapetrou, E., Pavlidou, F.-N   +2 more
openaire   +4 more sources

Orbital Engineering through Strain‐Induced Spin–Orbit–Lattice Coupling in Sr2FeReO6 Double Perovskites

Advanced Functional Materials, EarlyView.
Epitaxial strain drives oxygen‐octahedral reconfiguration in Sr2FeReO6 double‐perovskite thin films, inducing orbital‐selective reconstruction of Re 5d states through modified Fe–O–Re hybridization. This coupled lattice–orbital response enables magnetic easy‐axis reversal and a transition from metallic‐like to semiconducting‐like transport.
Gahee Noh, Seong‐Sik Kim, Hansol Lee, Yong‐Jin Kim, Yeongrok Jin, Donghwa Lee, Ho Nyung Lee, Jaekwang Lee, Chan‐Ho Yang, Changhee Sohn, Si‐Young Choi   +10 more
wiley   +1 more source