Results 71 to 80 of about 843,694 (188)

Traffic Demands Dynamics-Aware Multi-Beam Satellite Framework for 6G Networks

IEEE Access
To meet the growing demand for dynamic and efficient satellite communication, multi-beam satellite (MBS) systems have emerged as a promising solution by subdividing wide coverage areas into smaller cells and directing multiple beams to illuminate them ...
Yumi Kim, Haneul Ko, Jaewook Lee
doaj   +1 more source

Spatial Reuse and Random Data Hopping in Multihop Ad-hoc Networks [PDF]

, 2007
Spatial reuse TDMA (time division multiple access) in multihop ad hoc network is a subject of intense research interest for next generation wireless systems. In this paper, the selection of concurrent communication pairs, that utilize the same resources,
Sinanovic, Sinan, Venkataraman, H., Haas, Harald   +2 more
core  

Volatile ZrO2 Antiferroelectric Tunnel Junctions for Rapid, Energy‐Efficient Physical Reservoir Computing

Advanced Science, EarlyView.
An antiferroelectric tunnel junction serves as a reservoir computing node, where field‐induced phase transitions and spontaneous ZrO2 relaxation deliver nonlinear fading memory. An In‐Ga‐Zn oxide interlayer enlarges the memory margin and multibit state richness.
Taegyu Kwon, Moonseek Jeong, Su In Hwang, Geun Hyeong Park, Joonyong Kim, Hyojun Choi, Hyeong Seok Choi, Da Hyun Kim, Dong Hee Han, Ju Yong Park, Seungho Baek, Jung Ho Yoon, Dong Hyun Lee, Min Hyuk Park   +13 more
wiley   +1 more source

Experimental validation and simulation of a U-Shaped elastic beam robot for stable running locomotion

Scientific Reports
This paper presents an innovative terrestrial robot employing a vibration-based locomotion system powered by a single DC motor with an eccentric rotating mass.
Wael Khalifa, Mahmoud A. Essam, M. Riad Ghazy, Ahmed Abu El-fadl   +3 more
doaj   +1 more source

Millisecond Spin Relaxation Times of Distinct Electron and Hole Subensembles in MAxFA1−xPbI3 Perovskite Crystals

Advanced Science, EarlyView.
Mixed‐cation MAx${\rm MA}_x$ FA1−x${\rm FA}_{1-x}$ PbI3${\rm PbI}_3$ perovskite crystals reveal multiple discrete electron and hole spin subensembles associated with distinct localization environments. Optically detected magnetic resonance combined with resonant spin inertia uncovers carriers spin relaxation times reaching 2 ms and identifies nuclear ...
Rongrong Hu, Sergey R. Meliakov, Dmitri R. Yakovlev, Bekir Turedi, Maksym V. Kovalenko, Manfred Bayer, Vasilii V. Belykh   +6 more
wiley   +1 more source

Time-Hopping Multicarrier Code-Division Multiple-Access: System Outline and Performance [PDF]

, 2006
A time-hopping multicarrier code-division multiple-access (TH/MC-CDMA) scheme is proposed and investigated. In the proposed TH/MC-CDMA each information symbol is transmitted by a number of time-domain pulses with each timedomain pulse modulating a ...
Lie-liang Yang, Yang, Lie-Liang
core   +1 more source

Terahertz‐Nanoscale Visualization of the Microscopic Spin‐Charge Architecture of Colossal Magnetoresistive Switching

Advanced Science, EarlyView.
This study employs cryogenic magneto‐terahertz nanoscopy to reveal the real‐space electrodynamics of the colossal magnetoresistance transition. By capturing the terahertz electrodynamic evolution of field‐driven spin switching, the work unveils the dissipative dynamics of emergent metallic states, providing a high‐frequency view of coupled spin‐charge ...
Samuel Haeuser, Randall K. Chan, Richard H. J. Kim, Joong‐Mok Park, Martin Mootz, Thomas Koschny, Jigang Wang   +6 more
wiley   +1 more source

Performance of Hybrid Direct-Sequence Time-Hopping Ultrawide Bandwidth Systems over Nakagami-m Fading Channels

, 2007
This paper investigates and compares the performance of various ultrawide bandwidth (UWB) systems when communicating over Nakagami-m fading channels. Specifically, the direct-sequence (DS), time-hopping (TH) and hybrid direct-sequence time-hopping (DS-TH)
Yang, Lie-Liang, Ahmed, Qasim Zeeshan
core   +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

Phase‐Dependent Oxygen Defect Energetics in Epitaxial NbN/AlN/NbN Films

Advanced Science, EarlyView.
Phase dependent oxygen defect energetics in epitaxial δ‐NbN/AlN/δ‐NbN and β‐Nb2N/AlN/β‐Nb2N trilayers. Atomic‐scale analysis and first‐principles calculations reveal distinct oxygen incorporation pathways across NbN polymorphs. Layer resolved defect formation energies show that O is energetically more favorable within δ‐NbN electrodes, whereas in β ...
Prachi Garg, Kedarsh Kaushik, Danqing Wang, Naomi Pieczulewski, Anand Ithepalli, John Wright, Debdeep Jena, David A. Muller, Hong X. Tang, Cyrus Dreyer, Baishakhi Mazumder   +10 more
wiley   +1 more source