Results 111 to 120 of about 1,388,474 (253)
Advanced Materials, EarlyView.Stacked nanoflake assembly (SNA) membranes can oscillate autonomously, offering opportunities for soft actuation and energy harvesting. This work uncovers the physical mechanism behind the sustained oscillation of SNA membranes in gradient humidity and identifies three governing dimensionless parameters, enabling rational design for optimizing SNA ...
Zijing Zhang +5 more
wiley +1 more source
Acoustic energy distribution in space around the pipe outlet
Archives of Acoustics, 2014 The class-D power amplifiers which operate in a switched mode have become an attractive alternative of the conventional analog power amplifiers class-A, B and AB in the field of audio applications.
Zbigniew KULKA
doaj
Radiative Thermal Management for Extreme Environments: Mechanisms and Design Strategies
Advanced Materials, EarlyView.In this review, we discuss the fundamental mechanisms of radiative cooling and solar heating, material and structural design strategies, hybrid approaches integrating additional heat transfer pathways, and durability‐oriented designs addressing environmental stresses.
Hyung Rae Kim +5 more
wiley +1 more source
Soft and Transient Bioelectronics Enabled by Polymer‐Free Ti3C2Tx MXene Hydrogels
Advanced Materials, EarlyView.We present Ti3C2Tx MXene hydrogel (MXgel) bioelectronics, a soft, flexible, and fully transient platform for high‐fidelity neural recording and stimulation. MXgel bioelectronics exhibit exceptional electrical conductivities, low electrochemical impedances, and high charge injection capacities.
Raghav Garg +15 more
wiley +1 more source
Sub‐nm2 Ferroelectric Domains via Charged 180° Walls in ZrO2
Advanced Materials, EarlyView.Ferroelectric ZrO2${\rm ZrO}_2$ thin films host closely spaced charged 180∘$^{\circ }$ domain walls that vertically compress polar domains beyond their lateral half‐unit‐cell limit. These head‐to‐head and tail‐to‐tail walls show distinct bulk‐like structures, natural oxygen‐mediated stabilization, and highly asymmetric mobility, highlighting new ...
Nashrah Afroze +33 more
wiley +1 more source
Understanding sigma delta modulation: the solved and unsolved issues
, 2008 Sigma–delta modulation is the most popular form of analog-to-digital conversion used in audio applications. It is also commonly used in D/A converters, sample-rate converters, and digital power amplifiers. In this tutorial the theory behind the operation
REISS, J
core +3 more sources
[Barbara Jordan Delta Sigma Theta Sorority Scrapbook, 1969]
, 1969 Scrapbook documenting an address given by Texas State Senator Barbara Jordan at the Hotel Cortez in El Paso, Texas sponsored by the Delta Omega chapter of the Delta Sigma Theta sorority. The scrapbook consists of newspaper clippings, photographs, and the
Delta Sigma Theta Sorority
core
Advanced Materials, EarlyView.Mobile‐atom percolation underlying β‐relaxations fundamentally dictates the crystallization pathways of phase‐change materials. High‐frequency ultrasonic excitation dynamically modulates this critical mobility percolation network, substantially accelerating the crystallization process.
Yu‐Yao Liu +11 more
wiley +1 more source
Delta Sigma Phi fraternity activities
, 2018 Black and white photograph shows a display on a building's outside wall that reads "Delta Sigma Phi Concentrate on Victory" and has the image of a Deacon as Rodin's "The Thinker." Below the design are squares numbered 1-8, with Delta Sigma Phi in Greek ...
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