Results 111 to 120 of about 10,018,306 (276)

Performance Evaluation and Analysis of Transport Layer Protocols in Ultra-Large-Scale Low Earth Orbit Satellite Networks

天地一体化信息网络
Ultra-large-scale low earth orbit satellite internet, as a core component of space-air-ground integrated networks, is poised to become the cornerstone of next-generation wireless communication system architectures, thanks to its advantages such as high ...
Li Yisen, Zhang Mengyang, Liu Xiaoyu, Li Tao, Zhou Haibo   +4 more
doaj  

Interface‐Mediated Catalysis for Improved Hydrogen Storage in Reactive Hydride Composites

Advanced Materials, EarlyView.
Catalyst–hydride interfaces are engineered in Co@C‐ and Ni@C‐modified 2LiH + MgB2 reactive hydride composites to accelerate hydrogen uptake and release. Multiscale scattering, in‐situ synchrotron radiation powder x‐ray diffraction and density functional theory calculations reveal the structural and electronic origin of the catalytic enhancement ...
Yuanyuan Shang, Pawan Kumar Soni, Han Ge, Weijie Yang, Fahim Karimi, Thi Thu Le, Tamás Simon, Michael Fröba, Jitendra Mata, Joshua King, Hai‐Wen Li, Thomas Klassen, Claudio Pistidda   +12 more
wiley   +1 more source

Design of Low Earth Orbit Constellation Satellite

Journal of Research in Science and Engineering
This research explores the Low Earth Orbit (LEO) satellite constellations, replicating the commercial OneWeb system. This work is divided into two key sections: Distance & Geometric Analysis and Link Performance Analysis. We start by designing a Walker - star network of 12 orbital planes featuring a dozen satellites orbiting 950 km above the Earth ...
Asnarulkhadi Abu Samah, Ma’arof Bin Redzua   +1 more
openaire   +1 more source

Giant Anisotropic Spin Absorption in Chiral Hybrid Semiconductors

Advanced Materials, EarlyView.
Researchers uncover that chiral hybrid organic–inorganic semiconductors absorb spin differently depending on its polarization direction. This anisotropic spin absorption is primarily driven by the local symmetry breaking within the layered structure.
Cong Yang, Rui Sun, Mingwei Ge, Shehzad Khan, Subhrangsu Mukherjee, Matthew P. Hautzinger, Tianyou Lu, Harald Ade, Pius M. Theiler, Matthew C. Beard, Dali Sun, Mengxia Liu, Jun Liu   +12 more
wiley   +1 more source

Phase‐Engineered MoS2 Quantum Monolayer Catalysts

Advanced Materials, EarlyView.
A new type of catalyst model—phase‐engineered MoS2 quantum‐monolayer catalyst (∼0.8 nm thick, < 6 nm in the lateral size; switchable freely among metallic 1T, semiconducting 2H, and a hybrid phase of metallic‐semiconducting 1T‐2H)—is reported. It can efficiently and stably drive photochemical H2, syngas and ammonia synthesis as a catalyst or co ...
Ruijie Yang, Yingying Fan, Lillian Pernitsky, Mojtaba Ebrahimian Mashhadi, Ningxin Chen, Md. Mehadi Hassan, Zheng Li, Heng Zhao, Liang Mei, Zhiyuan Zeng, Zhangxing Chen, Jinguang Hu, Qingye Lu   +12 more
wiley   +1 more source

Descriptor‐Informed Screening of Interface‐Active Molecules for Efficient Magnesium Metal Anodes

Advanced Materials, EarlyView.
A descriptor‐informed molecular screening strategy identifies 4‐bromo‐N, N‐dimethylaniline (BrNNA) as an interface‐active electrolyte component that enables fast Mg stripping/plating in Mg(TFSI)2‐based electrolytes. By simultaneously regulating Mg2+ solvation and interphase formation, the BrNNA‐containing electrolyte delivers activation‐free Mg ...
Hao Xu, Yue Li, Tian Xie, Arafat Hossain Khan, Fengzhan Sun, Zhao Li, Lingyue Liu, Zhaohui Yang, Xinlong Xie, Huayu Qiu, Quanquan Guo, Tian Sun, Xingyuan Chu, Jingwei Du, Jianxin Zou, Xinliang Feng, Minghao Yu   +16 more
wiley   +1 more source

Demonstration of aerodynamic control manoeuvres in very low earth orbit using SOAR (Satellite for Orbital Aerodynamics Research)

, 2019
Aerodynamic forces have often been proposedas a possible means to perform a variety of different attitude and orbit control manoeuvres in very low Earth orbits including pointing control, constellation and formation management, and re-entry interface ...
Rodríguez Donaire, Silvia, Roberts, Peter C.E, Livadiotti, Sabrina, Sureda Anfres, Miquel, García-Almiñana, Daniel, Crisp, Nicholas H.   +5 more
core  

From Dark Photocatalysis to Photobattery‐Type Operation: A Re‐Functionalized Ti‐MOF for Solar Energy Storage

Advanced Materials, EarlyView.
ReCl47‐bpy is developed as a solar‐rechargeable, Re‐functionalized two‐dimensional metal–organic framework (MOF) for light‐driven charge storage and dark utilization. Re–bipyridine sites stabilize photoinduced electrons, enabling two complementary configurations: a MOF suspension for long‐lived charge retention and dark H2 evolution, and a spin‐coated ...
Shufan Wu, Chuyi Liu, Vasilis Petropoulos, Evgenia Dmitrieva, Giulio Cerullo, Erling Thyrhaug, Jürgen Hauer, Julien Warnan, Roland A. Fischer   +8 more
wiley   +1 more source

Stable Satellite Selection Method Using Orbital Prediction in Low-Earth-Orbit Satellite Networks

39th International Conference on Advanced Information Networking and Applications (AINA-2025), April 9 - April 11, 2025, Open University of Catalonia, Barcelona, Spain In recent years, Low Earth Orbit (LEO) satellite networks, such as Starlink, have seen significant advancements.
Keita Kashiwagi, Kazuya Tsukamoto
openaire   +2 more sources

Analysis of Performance Characteristics of a Low-Orbit Space Remote Sensing System Based on a Two-Mirror Ritchey–Chrétien Optical Design

Компьютерная оптика
The article presents an analysis of size and mass characteristics of an optical space-based remote Earth sensing system. An approach for modification of the two-mirror Ritchey–Chrétien optical design is proposed in order to be able to implement it on ...
V.V. Salmin , V.V. Volotsuev, K.V. Petrukhina, S.L. Safronov, I.S. Tkachenko, M.D. Korovin   +5 more
doaj   +1 more source