Results 131 to 140 of about 68,215 (317)
Sustainable Catalyst‐Free PLG Networks: Recyclability, Biodegradability, and Functional Performance
Advanced Functional Materials, EarlyView.A catalyst‐additive free covalent adaptable network is developed from star‐shaped poly(lactide‐co‐glycolide) cross‐linked with pyromellitic dianhydride, enabling internal carboxylic acid‐driven transesterification. The resulting biodegradable network exhibits mechanical robustness (Young's modulus ≈1.6 GPa), complete recyclability, rapid biodegradation
Lars Schwarzer +2 more
wiley +1 more source
Advanced Functional Materials, EarlyView.By mimicking the ion‐accelerating effect of ion channel receptors in neuron membranes, a biomaterials‐based ionic hydrogel (BIH) is developed, which offers a high ionic conductivity of 7.04 S m−1, outperforming conventional chitosan, cellulose, agarose, starch, and gelatin based ionic hydrogels.
Baojin Chen +7 more
wiley +1 more source
Analysis of the Aerodynamic Noise of an Automotive HVAC System
Zhileng xuebao, 2019 Automotive heating, ventilating, and air-conditioning (HVAC) noise is the primary noise source in an automotive air-conditioning system and mainly manifests as aerodynamic noise.
Wang Linan +3 more
doaj
A shock wave approach to the noise of supersonic propellers [PDF]
To model propeller noise expected for a turboprop aircraft, the pressure ratio across the shock at the propeller tip was calculated and compared with noise data from three propellers.
Dittmar, J. H., Rice, E. J.
core +1 more source
Advanced Functional Materials, EarlyView.Liquid‐phase transmission electron microscopy enables direct observation of nucleation and growth processes in solution. This review is dedicated to the remembrance of Helmut Cölfen and highlights recent studies on complex materials—oxides, biominerals, organic–inorganic crystals—which were central to his research activity. It summarizes key milestones,
Charles Sidhoum +5 more
wiley +1 more source
Numerical Simulation of Aerodynamic Noise Generated by Large Wind Blade Airfoil
Kongzhi Yu Xinxi Jishu, 2017 Aiming to reduce aerodynamic noise of wind blade, a method of coupling CFD/CAA was used to simulate the aerodynamic noise of wind blade airfoil. In this paper, surface pressure distribution of airfoil was obtained by using STAR-CCM+ and the near sound ...
LI Dongxu +5 more
doaj
Inlet noise on 0.5-meter-diameter NASA QF-1 fan as measured in an unmodified compressor aerodynamic test facility and in an anechoic chamber [PDF]
Narrowband analysis revealed grossly similar sound pressure level spectra in each facility. Blade passing frequency (BPF) noise and multiple pure tone (MPT) noise were superimposed on a broadband (BB) base noise.
Gelder, T. F., Soltis, R. F.
core +1 more source
2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics
Advanced Functional Materials, EarlyView.2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit +5 more
wiley +1 more source
Aerodynamic and acoustic performance of a contracting cowl high throat Mach number inlet installed on NASA quiet engine C [PDF]
The approach and takeoff performance was evaluated of a contracting cowl variable geometry design inlet installed on a high-bypass-ratio turbofan engine.
Blommer, H. E., Schaefer, J. W.
core +1 more source
High-speed-propeller wind-tunnel aeroacoustic results [PDF]
, 1980 Some aerodynamic concepts are presented together with an explanation of how these concepts are applied to advanced propeller design. The unique features of this propulsion system are addressed with emphasis on the design concepts being considered for the
Dittmar, J. H., Jeracki, R. J.
core +1 more source