Results 31 to 40 of about 584 (198)

Dynamic channel estimation in large-scale massive MIMO systems with intelligent reflecting surfaces: Leveraging Khatri-Rao factorization and bilinear alternating least squares

Ain Shams Engineering Journal
In large-scale massive MIMO systems with intelligent reflecting surfaces (IRS), dynamic channel estimation (CE) is essential for optimizing the system performance and ensuring reliable communication.
E. Elakkiyachelvan, R.J. Kavitha
doaj   +1 more source

Intelligent Reflecting Surfaces for Underwater Visible Light Communications

IEEE Photonics Journal, 2023
Intelligent reflecting surfaces (IRSs) offer paradigm shift towards enhancing the capabilities of wireless communications. The use of this emerging technology in the realm of underwater wireless systems is a promising solution to overcome the limitations
Yalcin Ata, Hanaa Abumarshoud, Lina Bariah, Sami Muhaidat, Muhammad Ali Imran   +4 more
doaj   +1 more source

Intermediate Resistive State in Wafer‐Scale Vertical MoS2 Memristors Through Lateral Silver Filament Growth for Artificial Synapse Applications

Advanced Functional Materials, EarlyView.
In MOCVD MoS2 memristors, a current compliance‐regulated Ag filament mechanism is revealed. The filament ruptures spontaneously during volatile switching, while subsequent growth proceeds vertically through the MoS2 layers and then laterally along the van der Waals gaps during nonvolatile switching.
Yuan Fa, Milan Buttberg, Ke Ran, Rana Walied Ahmad, Dennis Braun, Lukas Völkel, Jimin Lee, Sofía Cruces, Bart Macco, Bárbara Canto, Holger Lerch, Thorsten Wahlbrink, Holger Kalisch, Michael Heuken, Andrei Vescan, Joachim Mayer, Zhenxing Wang, Ilia Valov, Stephan Menzel, Max C. Lemme   +19 more
wiley   +1 more source

Functionalizing Micro‐to‐Mesoscopic Electrode Architectures for Regulating Electron Transfer Behaviors in Electrocatalysis

Advanced Functional Materials, EarlyView.
A systematic review is conducted to assess the influence of electrode architecture across micro‐ to mesoscopic length scales on electron‐transfer pathways in electrocatalysis. We discuss the structure‐activity relationships in electrocatalytic applications, including resource recovery and environmental remediation, and provide cost‐effective, efficient
Manshu Zhao, Jiaojiao Zhang, Shideng Yuan, Xinmeng Yu, Keming Wan, Xiaoguang Duan, Zhining Wang   +6 more
wiley   +1 more source

Geometry‐Driven Whispering‐Gallery Modes in Self‐Assembled Phosphorescent Organic Microtubes

Advanced Optical Materials, EarlyView.
Micelles encapsulating tris(2‐phenylpyridine)iridium(III) self‐assemble into a hollow hexagonal microtube stabilized by a surface passivation layer. The hexagonal cross‐section confines circulating light along its facets, sustaining sharp whispering‐gallery resonances that guide photoluminescence emission under laser excitation.
Do Wan Kim, Seokho Kim, Jinho Choi, Sang‐hun Lee, Seongwan Bae, Jongho Kim, Sangjun Lee, Junseok Heo, Sangin Kim, Kyusang Lee, Dong Hyuk Park   +10 more
wiley   +1 more source

Friend, Not Foe: Lowered Tissue Reactivity to Long‐Term Polyimide Implants

Advanced Science, EarlyView.
The choice of optimal neural probe designs remains a major challenge in the field of neurotechnology. This study investigated the biocompatibility of several probe variations, including material, thickness, width, and implantation strategy. It highlights the clear advantage of soft polyimide probes over stiff silicon probes for better device ...
Corinne Orlemann, Laura M. De Santis, Paul Neering, Christian Boehler, Kirti Sharma, Arno Aarts, Tobias Holzhammer, Rik J. J. van Daal, Patrick Ruther, Maria Asplund, Roxana N. Kooijmans, Pieter R. Roelfsema   +11 more
wiley   +1 more source

A systematic review of intelligent reflecting surface aided non-orthogonal multiple access beamforming-based free space optical communication systems

Al-Qadisiyah Journal for Engineering Science
The intelligent reflecting surfaces (IRSs) that support non-orthogonal multiple access (NOMA), and using beamforming techniques in free space optical (FSO), are systematically reviewed in this study.
Batool Rafid Natiq, Lwaa Faisal Abdulameer   +1 more
doaj   +1 more source

RETRACTED ARTICLE: Energy efficient IRS assisted 6G network for Industry 5.0

Scientific Reports, 2023
The real world applications are more prone to difficulties of challenges due to fast growth of technologies and inclusion of artificial intelligence (AI) based logical solutions.
Ashu Taneja, Shalli Rani, Saleem Raza, Amar Jain, Shebnam M. Sefat   +4 more
doaj   +1 more source

Coordination‐Tuned Iridium Single‐Atom Nanozymes Boost Multienzyme Activity for Colorimetric Sensing

Advanced Science, EarlyView.
Breaking the coordination symmetry of Ir single‐atom sites through asymmetric Ir–N3S1 engineering tailors interfacial electron transfer, oxygen activation, and multienzyme‐like catalytic pathways. Operando spectroscopy and theoretical modeling uncover the atomic‐level origin of activity enhancement, providing a strategy for designing multifunctional ...
Tao Li, Xinyu Zhang, Jiashan Xia, Mengyu Wu, Cong Liu, Yapei Sun, Wanjiang Zhao, Min Qian, Wei Wang, Weixia Duan, Shangcheng Xu   +10 more
wiley   +1 more source

Dual Compartmentalization of GSTA4 Suppresses Ferroptosis to Drive Antiandrogen Resistance in Prostate Cancer

Advanced Science, EarlyView.
The schematic diagram depicts a compartmentalized anti‐ferroptotic defense mechanism mediated by GSTA4. GSTA4 is upregulated and localizes to the cytoplasm in ENZR cells, where it detoxifies 4‐HNE via a non‐canonical GSH‐dependent pathway. Under oxidative stress, GSTA4 translocates to mitochondria, interacts with PGAM5, and blocks Drp1 Ser637 ...
Yong Luo, Wei Zhuang, Zean Li, Yiming Lai, Yongyi Ou, Dongquan Li, Shanhe Huang, Tianlong Luo, Jintao Hu, Bingliang Chen, Jianhan Fu, Tao Zhuo, Hankun Jiang, Yin Lu, Hai Huang, Kewei Xu, Shengmeng Peng, Qing Yuan   +17 more
wiley   +1 more source