Results 91 to 100 of about 48,925 (221)
Annealing Effect for Supersolid Fraction in $^4$He
, 2007 We report on experimental confirmation of the non-classical rotational inertia (NCRI) in solid helium samples originally reported by Kim and Chan. The onset of NCRI was observed at temperatures below ~400 mK.
A. Leggett +16 more
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Advanced Science, Volume 13, Issue 9, 13 February 2026.Herein, the correlational changes of each PEDOT Raman peak to morphology and doping level are identified. Two equations are derived to estimate PEDOT π–π spacing and doping level from Raman spectra (from which mobility is also extracted). GIWAXS and XPS results validate the estimation equations.
Tzu‐Yi Thomas Yu +7 more
wiley +1 more source
Curved Bistable Origami‐Inspired Flexible Transcatheter Mitral Valve Clamping
Advanced Science, Volume 13, Issue 8, 9 February 2026.A lightweight bistable curved origami dilator combines reversible deformation and high stability, offering a promising solution for minimally invasive mitral valve repair. Abstract Curved origami exhibits remarkable potential for minimally invasive medical applications owing to its unique geometric programmability and mechanical tunability. Building on
Siyu Gao +4 more
wiley +1 more source
Mechanochromic Organic Materials: Molecular Mechanisms and Multidimensional Applications
Advanced Physics Research, Volume 5, Issue 2, February 2026.Mechanochromic (MC) organic materials change color in response to mechanical force. This review elucidates the molecular mechanisms (e.g., aggregation‐induced emission, AIE) and explores their multidimensional applications in sensors, anti‐counterfeiting, biomedical devices, and structural health monitoring, providing a roadmap for future smart ...
Xiaozhe Yin +5 more
wiley +1 more source
Analytical design and evaluation of an active control system for helicopter vibration reduction and gust response alleviation [PDF]
An analytical study was conducted to define the basic configuration of an active control system for helicopter vibration and gust response alleviation. The study culminated in a control system design which has two separate systems: narrow band loop for ...
Gold, P. +3 more
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Chemistry &Biodiversity, Volume 23, Issue 2, February 2026.This study reports the green biosynthesis of piperine‐functionalized silver nanoparticles from Piper nigrum seed extract, followed by comprehensive physicochemical characterization and in vitro cytotoxic evaluation. The results confirm successful nanocomposite formation and demonstrate a marked enhancement of cytotoxic activity against gastric cancer ...
Nylton Ferreira Maciel +17 more
wiley +1 more source
A spectroscopic study of intermediates in the condensation of refractory smokes: Matrix isolation experiments SiO [PDF]
The infrared and Raman spectra of N2 matrix isolated silicon oxides are investigated. The vibrational frequencies of SiO, Si2O2, and Si3O3 were identified and assigned on the basis of normal coordinate analyses. Heating the solid to 50 K (evaporating the
Donn, D., Khanna, R. K., Stranz, D. D.
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Engineering Reports, Volume 8, Issue 2, February 2026.This comprehensive study advances delamination analysis in composites through innovative computational methods, experimental validation techniques, and predictive algorithms, collectively enhancing damage progression prediction and structural health monitoring for improved integrity in high‐performance applications.
Dhivya Elumalai +4 more
wiley +1 more source
Noise, Vibration, and Harshness (NVH) Challenges in Hydrogen Internal Combustion Engine Vehicles
Energy Science &Engineering, Volume 14, Issue 2, Page 1067-1080, February 2026.ABSTRACT This paper presents a state‐of‐the‐art literature review on noise, vibration, and harshness (NVH) in hydrogen‐fuelled internal combustion engines. Studies published between 2011 and 2025 were screened, covering fundamental flame physics, test‐bench work, and recent prototype vehicles.
Krisztián Horváth
wiley +1 more source
Rotorcraft flight research with emphasis on rotor systems [PDF]
Over fifty years of contributions by NASA and the Army through rotor systems flight research were examined with an emphasis on the last 25 years. During this time, the helicopter has gone from an abnormality that did a few useful things to a vehicle that
Snyder, William J.
core +1 more source