Results 131 to 140 of about 3,108 (295)

Orbit Aware-Based Satellite Selection Method for Reducing Handover Frequency in LEO Satellite Networks

IEEE Access
Low Earth Orbit (LEO) satellite networks, represented by Starlink, have rapidly advanced as communication solutions for unconnected regions and during disaster scenarios.
Keita Kashiwagi, Kazuya Tsukamoto
doaj   +1 more source

Keggin‐Type Aluminum Polyoxometalate‐Mediated Oxidation of Amorphous Carbon for Engineered Electrochemical Interfaces

Carbon Energy, EarlyView.
Keggin‐type Al‐POM‐coated silica achieves selective surface oxidation of amorphous carbon through electrostatic attraction and proton‐coupled oxidation, tailoring interfacial properties for lithium‐ion batteries and semiconductor processes. ABSTRACT Amorphous carbon is widely used in energy storage and semiconductor technologies, where surface ...
Ganggyu Lee, Dongmin Kang, Sumin Hong, Hongjun Park, Myungju Woo, Woojin Jeong, Giha Lee, Junsang Lee, Sangkyun Kim, Jea‐Gun Park, Takamasa Mori, Yehwan Kim, Taeseup Song, Ungyu Paik   +13 more
wiley   +1 more source

Unlocking Potential in LEO Satellites Communications Through Spatial Modulation and Space Shift Keying

IEEE Open Journal of the Communications Society
As future wireless networks demand higher throughput and lower latency, Low Earth Orbit (LEO) satellites have become essential to supplement terrestrial infrastructure.
Chaorong Zhang, Benjamin K. Ng, Yuyan Liu, Ke Wang, Chan-Tong Lam   +4 more
doaj   +1 more source

Alloying Cu, Fe, and Co in Ni/YSZ Electrodes for High‐Temperature CO2 Electrolysis: Impact on TPB Density, Activity, and Carbon Deposition Resistance

Carbon Energy, EarlyView.
Systematic alloying of Ni with Cu, Fe, and Co in Ni/YSZ electrodes modifies active site density up to 43%, decreases activation energies by up to 44%, and reduces carbon deposition fourfold. Cu–Ni alloy is among the most promising alloy catalysts for electrochemical CO2 reduction in SOECs.
Min Jun Oh, Sooin Lee, Jeeho Hong, Kyung Joong Yoon, Ho‐Il Ji, Ji‐Won Son, Jong‐Ho Lee, Kyeounghak Kim, Jongsup Hong, Sungeun Yang   +9 more
wiley   +1 more source

Engineering Biochar‐Derived Functional Materials for High‐Performance Supercapacitors: Design Principles, Mechanisms, and Scalable Strategies

Carbon Energy, EarlyView.
ABSTRACT Biochar has emerged as a useful and adaptable source of carbon for supercapacitor electrodes. Its value comes from the way biomass chemistry, thermal conversion, and activation conditions shape the resulting pore network, surface groups, and degree of carbon ordering.
Soumen Mandal, Avinash C. Mendhe, Mayna Roy, Neha S. Barse, Taejoon Park, Han‐Seung Lee, Haigun Lee   +6 more
wiley   +1 more source

Kirkendall‐Effect‐Mediated Hollow Bimetallic Hexacyanoferrates for Aqueous Zn‐Ion Batteries: Suppressing Jahn–Teller Distortions and Enhancing Ion Transport and Cyclability

Carbon Energy, EarlyView.
Kirkendall‐engineered hollow Ni–Mn hexacyanoferrates feature Ni‐tunable shell thickness and uniform alloying, coupling architectural control with electronic stabilization. Composition–morphology co‐optimization suppresses Mn³⁺‐driven Jahn–Teller distortions and lowers charge‐transfer barriers, enabling rapid Zn²⁺ transport and reversible redox.
Jihong Kim, Nayeon Shin, Byung Do Lee, Sung Min Wi, Sohyeon Park, Woon Bae Park, Younghyun Cho, Wook Ahn, Jaehan Lee, Jong Bae Park, Juwon Lee, Sangyeon Pak, Young‐Woo Lee   +12 more
wiley   +1 more source

Verification of Ground Station Diversity for Direct Optical TTC-Downlinks from LEO Satellites by means of an Experimental Laser Source

, 2010
Most of today's satellites make use of microwave data-links for their TTC-downlinks. However, these data-links are limited in terms of achievable data-rate and spectrum availability.
Fuchs, Christian, Giggenbach, Dirk, Brechtelsbauer, Martin   +2 more
core  

Routing Optimization on LEO Satellite Networks Using Orchestrator

In today’s telecommunications, wireless systems based on 5G technology have emerged as dominant due to their unparalleled speed and low latency. In the last few years, we have witnessed a process of integration of ground-based telecommunication systems ...
Radha Prasad, Chaitra
core   +1 more source

Ruthenium‐Titania Interface‐Mediated Water Activation for High Turnover Frequency in Alkaline Hydrogen Evolution

Carbon Energy, EarlyView.
Heterostructured interfaces can accelerate hydrogen evolution by improving water dissociation, yet their underlying mechanisms remain unclear. This study combines in situ Raman spectroscopy and density functional theory to reveal how the RuO2/TiO2 interface promotes both water dissociation and hydrogen adsorption, providing new insights into the ...
Dwi Sakti Aldianto Pratama, Andi Haryanto, Hyun Woo Lim, Chan Woo Lee   +3 more
wiley   +1 more source

Physical Cell Identity Planning for Access Interference Avoidance in Large-Scale LEO Satellite Networks

天地一体化信息网络
LEO satellite communication networks, featuring wide coverage, low latency, and flexible deployment, have become an important part of integrated space-terrestrial communications.
Yang Fei, Zhang Xing, Wang Wenbo
doaj