Results 151 to 160 of about 31,184 (319)

Cut‐Enabled Mechanical Metamaterials for Multimodal and Reprogrammable Static Nonreciprocity

open access: yesAdvanced Science, EarlyView.
Cut‐enabled mechanical metamaterials are designed to overcome the challenge of obtaining multiple and reprogrammable static nonreciprocal modes in a single microstructural topology. It offers a pathway to synthesize multiple nonreciprocal modes and control the nonreciprocal responses, enhancing the functionality of metamaterials.
Jinhao Zhang   +8 more
wiley   +1 more source

Electromagnetically Coupled Resonant Face‐to‐Face Double‐Layer Metamaterial for Highly Sensitive THz Impedance Spectroscopy

open access: yesAdvanced Science, EarlyView.
A unique electromagnetic coupling between two ELC resonating metamaterial sensors in a THz optical cavity in face‐to‐face configuration, is copiously stable for any misalignment, and enhances resonant q‐factor to 549, dielectric sensitivity to 2300 GHz RIU−1; the highest to date.
Rudrarup Sengupta   +2 more
wiley   +1 more source

Gravito-electromagnetism, Kerr-Schild and Weyl double copies; a unified perspective

open access: yesJournal of High Energy Physics
Two modern programs involving analogies between general relativity and electro-magnetism, gravito-electromagnetism (GEM) and the classical double copy (CDC), induce electromagnetic potentials from specific classes of spacetime metrics.
Elena Cáceres   +2 more
doaj   +1 more source

Wide‐/Narrow‐Bandgap Heterojunction for High Performance Differential Photodetector with Tunable Response

open access: yesAdvanced Science, EarlyView.
A differential photodetector is developed by applying the unique characteristics of a wide‐/narrow‐bandgap semiconductor heterojunction. The mechanism based on band alignment enables high detectivity and high bandwidth with tunable photoresponse.
Ziyang Ren   +11 more
wiley   +1 more source

New perspectives on classical electromagnetism

open access: yes, 2009
The fallacies associated with the gauge concept in electromagnetism are illustrated. A clearer and more valid formulation of the basics of classical electromagnetism is provided by recognizing existing physical constraints as well as the physical reality of the vector potential.
openaire   +2 more sources

Additive Manufactured Magnetoelectric Wireless Retainer as the Periodontal Remodeler for Post‐Orthodontic Tissue Reconstruction and Relapse‐Inhibition

open access: yesAdvanced Science, EarlyView.
Orthodontic relapse persists as a 120‐year challenge, as traditional retainers fail to remodel tissue, causing lifelong dependence. This study demonstrates a flexible magnetoelectric retainer (FMOR) enabling wireless periodontal remodeling. FMOR cues shift periodontal ligament cell (PDLC) paracrine signaling, promoting M2 macrophages, osteogenic ...
Haoqi Lei   +9 more
wiley   +1 more source

Quantitative derivation of the cosmic microwave background radiation spectrum and temperature and its relationship with the Hubble constant

open access: yesAIP Advances
The alarming discrepancies between predictions from hot big bang cosmological models and results from deep space observations by the James Webb Space Telescope necessitate a fundamental paradigm shift in cosmology.
Wenzhong David Zhang
doaj   +1 more source

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