Results 81 to 90 of about 5,333,513 (244)

Design of Active Reconfigurable Intelligent Surface for Sub-6 GHz

, 2023
This paper proposes a channel model for reconfigurable intelligent surfaces (RIS). The model takes into account the losses incurred by digital phase shifters in different phase states and considers the influence of antenna polarization, making it more ...
Wu, Chi-Hung
core  

Bacteria‐Trained, MnO2‐Armored Dendritic Cells for Immunotherapy

Advanced Materials, EarlyView.
MnO2‐armored, bacteria‐trained dendritic cells undergo tumor‐responsive mechanical and immunological transformation. The nanocoating masks immune ligands and maintains a mechanically stiff, quiescent state during circulation, while the tumor microenvironment removes the armor and restores cellular deformability and immune accessibility.
Zhao Guo, Min Ge, Zesong Ruan, Tingwang Shi, Mahyar Mahmoudi, Soohwan An, Na Kong, Yunfeng Chen, Han Lin, Wei Tao   +9 more
wiley   +1 more source

Liquid‐Crystal‐Based Reconfigurable Intelligent Surface for 7 GHz Mobile Communication

Advanced Materials Technologies, EarlyView.
The glass‐based liquid‐crystal reconfigurable intelligent surface (LC‐RIS) integrates active‐matrix driving and blind‐greedy phase optimization within a 5G‐NR OFDM framework. This enables continuously tunable and autonomous enhancement of wireless coverage. Leveraging the transparency and manufacturability of liquid crystal panels, it is ideally suited
Tien‐Lun Ting, Yuh‐Chyi Chang, Yi‐Chan Hung, Cheng‐Yuan Hsiao, Chao‐Kai Wen, Tsung‐Hsien Lin   +5 more
wiley   +1 more source

Intelligent Omni-Surface: Ubiquitous Wireless Transmission by Reflective-Refractive Metasurfaces

, 2022
International audienceIntelligent reflecting surfaces (IRSs), which are capable of adjusting radio propagation conditions by controlling the phase shifts of the waves that impinge on the surface, have been widely analyzed for enhancing the performance of
Zhang, Hongliang, Poor, H., Vincent, Tan, Yunhua, Di, Boya, Zhang, Shuhang, Di Renzo, Marco, Han, Zhu, Song, Lingyang, Yunhua Tan, Lingyang Song, H. Vincent Poor, Boya Di, Shuhang Zhang, Marco Di Renzo, Zhu Han, Hongliang Zhang   +15 more
core   +1 more source

Thermoresponsive Self‐Healing Carbon Nanotube‐Reinforced Dual‐Network Hydrogels for Wearable Sensors and Information Concealment

Advanced Materials Technologies, EarlyView.
A CNT‐reinforced dual‐network hydrogel combines ionic liquid‐mediated thermoresponsiveness, dynamic covalent crosslinking, and conductive nanostructures within a single adaptive material. The hydrogel exhibits ultrafast gelation, autonomous self‐healing, >1000% stretchability, reversible optical switching, and stable electromechanical sensing, enabling
Xia Qiu, Xiaolong He, Paul Morandi, Petra Rudolf, Rudy Folkersma, Vincent S. D. Voet, Katja Loos   +6 more
wiley   +1 more source

Two-Timescale Design for Reconfigurable Intelligent Surface-Aided Massive MIMO Systems with Imperfect CSI

, 2021
Revision in IEEE TIT. Keywords: Reconfigurable Intelligent Surface, Intelligent Reflecting Surface, Massive MIMO, Channel estimation, etcRevision in IEEE TIT.
Zhi, K, Poor, HV, Wang, J, Elkashlan, M, Renzo, MD, Wang, K, Schober, R, Ren, H, Hanzo, L, Pan, C   +9 more
core   +1 more source

Degradable Magnetic Composites from Recycled NdFeB Magnets for Soft Actuation and Sensing

Advanced Robotics Research, EarlyView.
This work presents a degradable soft magnetic composite made from recycled NdFeB particles embedded in a gelatin‐based organogel. The material is processed into magnetic sensors and soft robotic components, which can later be dissolved in a green solvent to recover NdFeB magnetic particles.
Muhammad Bilal Khan, Lin Guo, Kilian Schäfer, Eduardo Sergio Oliveros‐Mata, Xiaotao Wang, Florian Hofmann, Matthias Lutzi, Mark Suppelt, Proloy Taran Das, Jan Schmidtpeter, Imants Dirba, Stephan Rinderknecht, Mario Kupnik, Denys Makarov, Oliver Gutfleisch   +14 more
wiley   +1 more source

Waveguide Photoactuators: Materials, Fabrication, and Applications

Advanced Robotics Research, EarlyView.
Waveguide photoactuators convert guided light into mechanical motion. Their tethered‐flexible design enables minimally invasive surgery and confined‐space robotics. This review aims to guide materials selection, device design, and system integration, accelerating the transition of waveguide photoactuators from laboratory prototypes to versatile ...
Minjie Xi, Hemin Pan, Yang Zong, Yongfeng Mei, Jizhai Cui   +4 more
wiley   +1 more source

Data collection in deep reinforcement learning-enhanced reconfigurable intelligent surface-assisted wireless networks [PDF]

In the evolving sixth generation (6G) landscape, the integration of reconfigurable intelligent surfaces (RIS) with unmanned aerial vehicles (UAVs) offers a revolutionary opportunity to optimise data collection in the Internet of things (IoT) through deep
Ertas, I., Yetgin, H.
core   +1 more source

Joint User Localization and Location Calibration of A Hybrid Reconfigurable Intelligent Surface

, 2023
The recent research in the emerging technology of reconfigurable intelligent surfaces (RISs) has identified its high potential for localization and sensing.
Ghazalian, Reza,, Jäntti, Riku,, George C Alexandropoulos, Riku Jäntti, Ghazalian, Reza, Gonzalo Seco-Granados, Henk Wymeersch, Alexandropoulos, G. C., Reza Ghazalian, Hui Chen, Seco-Granados, G., Alexandropoulos, G. C.,, Seco-Granados, G.,, Chen, Hui, Wymeersch, Henk,, Wymeersch, Henk, J\ue4ntti, Riku, Chen, Hui,   +17 more
core   +1 more source