Results 41 to 50 of about 9,047,501 (218)

Resource Allocation for Beam-Hopping-Based Satellite Systems With Spectrum Sharing

IEEE Access
With the dense deployment of the satellite constellations, spectrum sharing among multiple satellite communication systems is a feasible way to alleviate the scarcity of spectrum resources.
Mengying Zhang, Xiumei Yang, Zhiyong Bu
doaj   +1 more source

Volatile Memristive Devices With Tunable Temporal Dynamics For Event‐Based Sensing

Advanced Materials, EarlyView.
Tunable volatile memristive devices can serve various neural‐inspired tasks that require different time windows of information retention. The ionic‐based volatility of the presented Pt/a‐STO/TaOx/Ta device stack can be reproducibly and controllably tuned in multiple ways.
Dimitrios Spithouris, Johannes Hellwig, Hugh Greatorex, Clemens Wittberg, Panagiotis Koutsogiannis, César Magén, Elisabetta Chicca, Regina Dittmann   +7 more
wiley   +1 more source

Analytical Model of Information Exchange in the Low-Orbit Segment of Heterogeneous Networks Using Discrete Beam Hopping Technology

Journal of Aerospace Technology and Management
Low-orbit satellite communication systems are an important element of geographically distributed heterogeneous networks (HetNets) and enable global fixed and personal mobile communications across the entire surface of the Earth.
Gennady Chechin, Valentin Kolesnichenko, Yuri Mikhailov, Ivan Zhuchkov   +3 more
doaj   +1 more source

Topological Spin‐Texture Transitions in van der Waals Magnets Revealed by X‐Ray Fourier Transform Holography

Advanced Materials, EarlyView.
Applied here for the first time to a 2D material, high‐resolution synchrotron x‐ray Fourier transform holography directly images topological spin textures in Fe3GeTe2. Combined with atomistic tight‐binding simulations including itinerant electrons and Rashba spin‐orbit coupling, the approach reveals labyrinth, skyrmion, and mixed phases, and uncovers ...
Sourav Chowdhury, Soumyaranjan Dash, Michael Schneider, Christopher Klose, Chithra H. Sharma, Lisa‐Marie Kern, Tim A. Butcher, Josefin Fuchs, Santanu Pakhira, Samik DuttaGupta, Takashi Taniguchi, Kenji Watanabe, Sujit Das, Sanjeev Kumar, Bastian Pfau, Amir‐Abbas Haghighirad, Moritz Hoesch   +16 more
wiley   +1 more source

Dynamic Beam Hopping Scheduling and Bandwidth Allocation Algorithms for Multi-Beam Satellite System

IEEE Access
With the rapid advancement of satellite networks, multi-beam satellite (MBS) communication systems have emerged as a highly effective technology for delivering reliable and high-speed services.
Sungwook Kim
doaj   +1 more source

Dual‐State Programmable Oxide Transistor for Time‐Based Cryptography

Advanced Materials, EarlyView.
A DUPOT enables independently tunable Vth and Isat depending on gate bias polarity, producing three‐dimensional dynamical behavior within a transfer characteristic. This behavior originates from charge trapping and oxygen‐ion migration in the HfO2 layer.
Huisu Noh, Min Gu Lee, Hwayoung Kim, Myeongchan Ko, Jungwan Noh, Taewook Go, Jingyao Yu, Sang‐Hee Ko Park, Himchan Cho, Kyung Min Kim   +9 more
wiley   +1 more source

Slow Frequency-Hopping Multicarrier DS-CDMA for Transmission over Nakagami Multipath Fading Channels

, 2001
A novel multiple access scheme based on slow frequency hopping multicarrier direct-sequence code division multiple access (SFH/MC DS-CDMA) is proposed and investigated, which can be rendered compatible with the existing second-generation narrowband CDMA ...
Yang, L-L., Hanzo, L.
core   +1 more source

Giant Nonequilibrium Valley Control via Spin‐Selective Hot‐Carrier Transfer in an Antiferromagnetic van der Waals Stack

Advanced Materials, EarlyView.
Spin‐selective hot‐carrier transfer across CrSBr/WSe2/CrSBr interfaces couples the continuously tunable magnetic configuration of antiferromagnetic CrSBr to the valley degrees of freedom of monolayer WSe2, enabling giant nonequilibrium valley control and magnetic‐state‐dependent reversal of circularly polarized emission.
Ke Xiao, Jiabao Yang, Kai Feng, Yicheng Guan, James Caleb Peters, Ramona Hoffmann, Niels Schröter, Stuart S. P. Parkin   +7 more
wiley   +1 more source

History of the Hopping family in England and genealogy of the John Hopping family in America /

, 1952
Includes indexes.Supplement by L. M.
Hopping, Louis M., 1900-, Hopping, Edward Stuart, b. 1871.   +1 more
core  

Ion-beam-assisted fabrication and manipulation of metallic nanowires [PDF]

, 2015
Metallic nanowires (NWs) are the key performers for future micro/nanodevices. The controlled manoeuvring and integration of such nanoscale entities are essential requirements.
Verma, H.C., Luo, X., Verma, H. C., Rajput, N.S., Tong, Zhen, Tong, Z., Rajput, N. S.   +6 more
core   +1 more source