Results 91 to 100 of about 13,084 (287)

Invisible Polymer Walls Enhance Reorientational Optical Nonlinearity in Oligothiophene‐Doped Liquid Crystals

open access: yesAdvanced Functional Materials, EarlyView.
The polymer wall stabilized dye‐doped liquid crystals (PWLCs) enhance the sensitivity of photoinduced molecular reorientation in dye‐doped LC systems. The PWLC with an invisible polymer wall successfully reduces the threshold intensity and functions as an optical limiter under the incidence of low intensity light laser source.
Junki Yokota   +6 more
wiley   +1 more source

Computational studies of speech intelligibility in open-plan offices

open access: yesMedycyna Pracy, 2019
Background Noise in open-plan offices, connected with an unintentional hearing of conversations and related distraction of attention, causes annoyance of employees.
Witold Mikulski
doaj   +1 more source

Multimodal Perception and Machine Learning‐Empowered Human Machine Interfaces With Double‐Network Hydrogel Fibers

open access: yesAdvanced Functional Materials, EarlyView.
This work develops polyacrylamide‐alginate (PAM‐Alg) double‐network hydrogel fibers for multimodal perception and intelligent human‐machine interfaces. The covalent‐ionic network provides high strength, toughness, and stable conductivity. Easily woven into wearables and integrated with soft robots, the fibers enable object and temperature recognitions ...
Yujue Yang   +10 more
wiley   +1 more source

A Multiband Excited Waveform-Interpolated 2.35-kbps Speech Codec for Bandlimited Channels

open access: yes, 2000
Following a brief portrayal of the activities in 2.4-kbps speech coding, a wavelet-based pitch detector is invoked, which reduces the complexity of conventional autocorrelation-based pitch detectors, while ensuring smooth pitch trajectory evolution. This
Brooks, F.C.A., Hanzo, L.
core  

Experimental comparison between speech transmission index (STI) and mean opinion scores (MOS) in rooms

open access: yesArchives of Acoustics, 2014
Two methods for assessment of speech quality in rooms were compared: the speech transmission index (STI) and mean opinion scores (MOS). Subjective and objective measurements were carried out in two rooms for different signal to noise ratio within a ...
Stefan Brachmanski
doaj  

Photothermal‐Activated Antibacterial Amyloid‐Polyphenol‐Iron Hydrogels for Synergistic Wound Healing

open access: yesAdvanced Healthcare Materials, EarlyView.
We report a thermally triggered supramolecular hydrogel (LTFe) formed by Fe3+ and tannic acid on lysozyme amyloid fibrils. Fe3+ enables rapid gelation and photothermal transduction with an efficiency of 88.56%. The LTFe hydrogel exhibits excellent biocompatibility, potent antibacterial activity against E. coli and S.
Di Wu   +8 more
wiley   +1 more source

Acoustic Conditions and Listening Performance in High-Stakes EFL Tests: An Observational Study of Real-World Data

open access: yesAcoustics
This study investigated how test room acoustic conditions relate to listening comprehension performance in a high-stakes English as a foreign language (EFL) assessment context.
Makito Kawata, Hiroshi Hasegawa
doaj   +1 more source

Bioinspired Adaptive Sensors: A Review on Current Developments in Theory and Application

open access: yesAdvanced Materials, EarlyView.
This review comprehensively summarizes the recent progress in the design and fabrication of sensory‐adaptation‐inspired devices and highlights their valuable applications in electronic skin, wearable electronics, and machine vision. The existing challenges and future directions are addressed in aspects such as device performance optimization ...
Guodong Gong   +12 more
wiley   +1 more source

LEAD: Literature Enhanced Ab Initio Discovery of Nitride Dusting Layers for Enhanced Tunnel Magnetoresistance and Lower Resistance Magnetic Tunnel Junctions

open access: yesAdvanced Materials, EarlyView.
Magnetic tunnel junctions (MTJs) using MgO tunnel barriers face challenges of high resistance‐area product and low tunnel magnetoresistance (TMR). To discover alternative materials, Literature Enhanced Ab initio Discovery (LEAD) is developed. The LEAD‐predicted materials are theoretically evaluated, showing that MTJs with dusting of ScN or TiN on ...
Sabiq Islam   +6 more
wiley   +1 more source

A Fast Index Assignment Algorithm for Vector Quantization

open access: yes, 1996
Vector quantisation, a widely used technique in low-bit rate coding of speech signals, is highly sensitive to errors in the transmitted codeword caused by noise in the transmission channel.
N. L. C. Talbot   +2 more
core  

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