Results 191 to 200 of about 85,320 (260)

Ultrasonic Rainbow: A Meta‐Transducer for Frequency‐Selective Elastic Wave Control via Dithering‐Based Wavenumber Tuning

Advanced Intelligent Systems, EarlyView.
A piezoelectric meta‐transducer generates an ultrasonic rainbow, steering guided elastic waves to different angles according to frequency. A dithering‐based binary electrode design enables a closer realization of the target wavenumber filter, improving directional purity and suppressing unwanted lobes. Numerical and experimental validation demonstrates
Masoud Mohammadgholiha, Jochen Moll, Kilian Tschöke, Carsten Kruska, Sylvia E. Gebhardt, Luca De Marchi   +5 more
wiley   +1 more source

Disordered mosaic metasurfaces with scalable functional density. [PDF]

Nat Commun
Li C, Liu C, Peters C, Yu H, Maier SA, Forbes A, Ren H.   +6 more
europepmc   +1 more source

Retinal Vessel Segmentation: A Comprehensive Review From Classical Methods to Deep Learning Advances (1982–2025)

Advanced Intelligent Systems, EarlyView.
Four decades of retinal vessel segmentation research (1982–2025) are synthesized, spanning classical image processing, machine learning, and deep learning paradigms. A meta‐analysis of 428 studies establishes a unified taxonomy and highlights performance trends, generalization capabilities, and clinical relevance.
Avinash Bansal, Jan Kubíček, Jana Bahrová, Alice Varyšová, Martin Augustýnek, Marek Penhaker, Juraj Timkovič   +6 more
wiley   +1 more source

Proximal sound printing: direct 3D printing of microstructures on polymers. [PDF]

Microsyst Nanoeng
Foroughi S, Habibi M, Packirisamy M.
europepmc   +1 more source

Measuring Local Exothermic Effects During the Oxidative Coupling of Methane Using Operando Luminescence Thermometry

Angewandte Chemie, EarlyView.
Operando luminescence thermometry shows that the local catalyst temperature can exceed the set oven temperature by almost 250°C during the exothermic oxidative coupling of methane process. We demonstrate how the reactor dimensions, catalyst grain size, and reactant feed mixture affect the local temperature.
Daniël W. Groefsema, Freddy T. Rabouw, D. Michiel Boele, A.N. René Bos, Alexander P. van Bavel, Bert M. Weckhuysen   +5 more
wiley   +1 more source

Plasmonic Arrays Resonating at D-Band Communication Frequencies. [PDF]

Materials (Basel)
Wei R, Liu M, Petersen S, Zhang W.
europepmc   +1 more source

Incorporation of Organic Counter‐Cations Into Poly(Heptazine Imide) Networks for Promoting Proton‐Coupled Electron Transfer During Photocatalytic H2O2 Evolution

Angewandte Chemie, EarlyView.
Incorporation of N‐based onium ions into the ionic framework of poly(heptazine imide) was obtained via protonation‐deprotonation of PHI frameworks arising from a parent Na‐containing analogue. Particularly, methylammonium moieties, through their small molecular size, hydrogen bonding capabilities and rotational mobility, appear to stabilize ...
Dingqiao Ji, Hikmat Binyaminov, Desiree Leistenschneider, Martin Oschatz, Paolo Giusto, Markus Antonietti, Horațiu Szalad   +6 more
wiley   +1 more source

A Spaceborne Integrated S/Ka Dual-Band Dual-Reflector Antenna. [PDF]

Micromachines (Basel)
Yang Z, Han W, Tang L, Wang H, Wang Y, Jiao Y.   +5 more
europepmc   +1 more source

Numerical study of reflection-based energy density enhancement in turbid media via wavefront shaping. [PDF]

Biomed Opt Express
Fritzsche N, Petzi M, Reitzle D, Kienle A.   +3 more
europepmc   +1 more source