Results 81 to 90 of about 3,080 (207)
A low-steering piezo-driven mirror
, 2018 We present a piezo-driven translatable mirror with excellent pointing stability, capable of driving at frequencies up to tens of kilohertz. Our system uses a tripod of piezo actuators with independently controllable drive voltages, where the ratios of ...
Boulier, T. +5 more
core +1 more source
Relation of Bulk‐to‐Shear Loss Factors in Viscoelastic Auxetic Metamaterials
physica status solidi (b), EarlyView.This article examines the dynamic behavior of isotropic auxetic viscoelastic materials, highlighting how negative Poisson's ratios affect energy dissipation, damping, and the interplay between bulk and shear moduli. By extending established viscoelastic theories to the auxetic range, it defines bound limits and underscores how dynamic Poisson's ratio ...
Simon Preston +2 more
wiley +1 more source
Development of 4D printing and its performance testing methods
Responsive Materials, EarlyView.This paper reviews the molding methods of 4D printing and its applications in various fields, with emphasis on 4D printing performance testing methods. Abstract 4D printing is a cutting‐edge additive manufacturing technology that introduces the time dimension, allowing printed objects to have dynamic, changeable properties, functions or shapes ...
Guiwei Li +8 more
wiley +1 more source
Small, EarlyView.High‐pressure studies of the lead‐free hybrid organic–inorganic ferroelectric [N(C2H5)3CH3]FeCl4 demonstrate record low compressibility, establishing it as the least compressible molecular ferroelectric known. In situ diamond anvil cell experiments identify halide selection and inorganic sublattice tuning as key compressibility controls, advancing ...
Takeshi Nakagawa +11 more
wiley +1 more source
Hybrid Electrostatic/Flextensional Mirror for Lightweight, Large-Aperture, and Cryogenic Space Telescopes [PDF]
A lightweight, cryogenically capable, scalable, deformable mirror has been developed for space telescopes. This innovation makes use of polymer-based membrane mirror technology to enable large-aperture mirrors that can be easily launched and deployed ...
Hackenberger, Wesley +3 more
core +1 more source
Collaborative development of diffraction-limited beamline optical systems at US DOE light sources [PDF]
, 2019 An ongoing collaboration among four US Department of Energy (DOE) National Laboratories has demonstrated key technology prototypes and software modeling tools required for new high-coherent flux beamline optical systems. New free electron laser (FEL) and
Assoufid, L +17 more
core
Small Methods, EarlyView.Upconversion nanoparticle photoluminescence was used to quantify heat burden during femtosecond direct laser writing of bioinks in real time. Transient temperature spikes above 120–140°C demonstrate the need for a stringent process optimization, and fast 20 µm/s scan speeds were established to maintain physiological conditions.
Amirbahador Zeynali +2 more
wiley +1 more source
Shape Control of a Unimorph Deformable Mirror for Space Active Optics under Uncertainties. [PDF]
Micromachines (Basel), 2023 Wang K, Yu Y, Preumont A.
europepmc +1 more source
, 2013 We developed an apparatus to couple a 50-micrometer diameter whispering-gallery silica microtoroidal resonator in a helium-4 cryostat using a straight optical tapered-fiber at 1550nm wavelength.
Arcizet, O. +3 more
core +1 more source
Moth‐Wing‐Inspired Multifunctional Metamaterials
Advanced Materials, Volume 38, Issue 9, 12 February 2026.This study develops a moth‐wing‐inspired heterogeneous metamaterial that achieves synergistic broadband sound absorption, mechanical energy dissipation, and thermal insulation within a lightweight architected framework. Combining bioinspired gradient design, genetic‐algorithm optimization, and additive manufacturing, the bionic heterogeneous acoustic ...
Haoran Pei +12 more
wiley +1 more source