Results 111 to 120 of about 448,853 (274)

Coordinated Multi‐Component Gradient Engineering of Catalyst Layers for Advanced Polymer Electrolyte Fuel Cells

Advanced Functional Materials, EarlyView.
This work presents a continuous linear gradient catalyst layer design, a general strategy for improving membrane electrode assemblies across electrochemical devices. Fabricated via a dual‐nozzle spray coating method, the architecture controls the Pt/carbon ratio, ionomer content and ionomer type across the catalyst layer, enhancing proton conduction ...
Shangwei Zhou, Matt P. Tudball, Yiming Guo, Bia Brandt, Adam Zucconi, Wenjia Du, Junfu Bu, Daniel H. C. Wan, Jianuo Chen, Emanuele Magliocca, Feng Ryan Wang, Alexander J.E. Rettie, Patrick S. Grant, Paul R. Shearing, Rhodri Jervis, Thomas S. Miller   +15 more
wiley   +1 more source

Physical Layer Security

This deliverable discloses closed form expressions for secrecy capacity analysis and the design of PLS techniques to achieve secure MTC transmission by utilising NOMA techniques. It provides inputs to Task 4.3 in WP4 for integrated link level and system level security measures; code implementation (e.g., in C) for WP5 system prototyping.
openaire   +3 more sources

Physical layer security performance of MF relay selection systems

Dianxin kexue, 2021
Aimed at the poor security performance of single antenna multi-relay modify-and-forward (MF) cooperative wireless systems in collusion eavesdropping scenario, MF cooperative physical layer security systems combining source node transmit antenna selection
Ying CHENG, Guangqiu LI, Jingjie SHEN, Liang WEI   +3 more
doaj  

Physical-Layer Security, Quantum Key Distribution, and Post-Quantum Cryptography. [PDF]

Entropy (Basel), 2022
Djordjevic IB.
europepmc   +1 more source

Solvent‐Free Bonding Mechanisms and Microstructure Engineering in Dry Electrode Technology for Lithium‐Ion Batteries

Advanced Functional Materials, EarlyView.
Dry electrode technology revolutionizes battery manufacturing by eliminating toxic solvents and energy‐intensive drying. This work details two promising techniques: dry spray deposition and polymer fibrillation. How their unique solvent‐free bonding mechanisms create uniform microstructures for thicker, denser electrodes, boosting energy density and ...
Yuhao Liang, Hao Long, Zimo Huang, Ting He, Xueming Chen, Meng Li, Hao Chen, Shanqing Zhang   +7 more
wiley   +1 more source

Endogenous security in the physical layer of wireless communications: key technologies, advantages and future challenges

Tongxin xuebao
The rapid development of wireless communications has put forward higher requirements for the design of security architectures for future communications.
LU Xinjin, SHI Yuxin, LEI Jing, YANG Zhifei, YANG Xiaojun   +4 more
doaj  

Physical Layer Security in Two-Way SWIPT Relay Networks with Imperfect CSI and a Friendly Jammer. [PDF]

Entropy (Basel), 2023
Hayajneh M, Gulliver TA.
europepmc   +1 more source

Energy‐Efficient Bulk Photoalignment of Main‐Chain Liquid Crystalline Polymers Enabled by In Situ Monitoring

Advanced Functional Materials, EarlyView.
In situ monitoring of bulk photoalignment reveals how molecular weight, azobenzene content, cooling rate, and thickness govern ordering in main‐chain liquid crystalline polymers. Optimized copolymers exceed conventional thickness limits, maintaining stable alignment up to 130 µm with high energy efficiency and reversible optical patterning.
Jaechul Ju, Joy Zhou, Connor J. O'Dea, Zachariah A. Page   +3 more
wiley   +1 more source

Deep Reinforcement Learning for Physical Layer Security Enhancement in Energy Harvesting Based Cognitive Radio Networks. [PDF]

Sensors (Basel), 2023
Lin R, Qiu H, Jiang W, Jiang Z, Li Z, Wang J.   +5 more
europepmc   +1 more source

Atomically Revealing Bulk Point Defect Dynamics in Hydrogen‐Driven γ‐Fe2O3 → Fe3O4 → FeO Transformation

Advanced Functional Materials, EarlyView.
In situ TEM uncovers the atomic‐scale mechanisms underlying hydrogen‐driven γ‐Fe2O3→Fe3O4→FeO reduction. In γ‐Fe2O3, oxygen vacancies cluster around intrinsic Fe vacancies, leading to nanopore formation, whereas in Fe3O4, vacancy aggregation is suppressed, preserving a dense structure.
Yupeng Wu, Dongxiang Wu, Wenhui Zhu, Xiaobo Chen, Zhikang Zhou, Zhilu Liang, Shuonan Ye, Meng Li, Xiao Tong, Kim Kisslinger, Sooyeon Hwang, Dmitri Zakharov, Renu Sharma, Judith C. Yang, Guangwen Zhou   +14 more
wiley   +1 more source