Results 71 to 80 of about 27,924 (308)

Dye‐Initiated Chirped Cholesteric Polymer Networks Exhibiting Broadband Dissipative Chiral Photonic Bands

Advanced Functional Materials, EarlyView.
A dye‐based photoinitiator acting as a structure‐directing element, guides the formation of a cholesteric polymer network that behaves as a chirped photonic structure with dissipative chiral coupling. Photopolymerization freezes a depth‐dependent helical pitch, broadening the Bragg resonance spectrum.
Alfredo Mazzulla, Pasquale Pagliusi, Gabriella Cipparrone   +2 more
wiley   +1 more source

Identification of sleep apnea events using discrete wavelet transform of respiration, ECG and accelerometer signals [PDF]

, 2013
Sleep apnea is a common sleep disorder in which patient sleep patterns are disrupted due to recurrent pauses in breathing or by instances of abnormally low breathing. Current gold standard tests for the detection of apnea events are costly and have the
Dermot Diamond, Coyle, Shirley, Mitchell, Edmond, Kane, Thomas, Thomas Kane, Gaughran, Jennifer, Kevin T. Sweeney, Shirley Coyle, Edmond Mitchell, Diamond, Dermot, Jennifer Gaughran, Richard Costello, Noel E. O'Connor, O'Connor, Noel E., Sweeney, Kevin, O\u27Connor, Noel E.   +15 more
core   +1 more source

Evaluating The Performance of DWT-DCT Feature Extraction in Guitar Chord Recognition

International Journal of Applied Sciences and Smart Technologies
This study presents advancements in audio signal processing techniques, specifically in enhancing the efficiency of guitar chord recognition. It is a continuation of the previous studies, which also aim at minimizing the feature extraction length with ...
Linggo Sumarno
doaj   +1 more source

Oxidized MoS2‐Based Multifunctional Memristive Hardware for Energy‐Efficient mmWave Signal Processing and In‐Memory Matrix Multiplication

Advanced Functional Materials, EarlyView.
Thermally oxidized MoS2‐based radio‐frequency switches enable a multifunctional platform that unifies broadband RF switching and in‐memory computation. The device achieves a cutoff frequency of 33.2 THz with high energy efficiency and supports hardware‐aware signal processing.
Juho Son, Changwoo Pyo, Sungmoon Park, Yoongi Cho, Seungchan Lee, Myungsoo Kim   +5 more
wiley   +1 more source

Lifting wavelet algorithm for freeform surface filtering using a Gaussian prediction operator

, 2013
The aim of the paper is to investigate a novel lifting wavelet algorithm based on a Gaussian prediction operator to filter freeform surfaces represented by 3D triangular meshes.
Abdul-Rahman, Hussein S., Jiang, Xiang, Scott, Paul J.   +2 more
core   +1 more source

Multiresolution analysis over simple graphs for brain computer interfaces [PDF]

, 2013
Objective. Multiresolution analysis (MRA) offers a useful framework for signal analysis in the temporal and spectral domains, although commonly employed MRA methods may not be the best approach for brain computer interface (BCI) applications.
Palaniappan, R, Gan, J Q, Asensio-Cubero, J, Gan, JQ, Palaniappan, Ramaswamy   +4 more
core   +1 more source

Low‐Profile, High‐Gain GRIN RF Lenses via Multi‐Material Vat Photopolymerization

Advanced Functional Materials, EarlyView.
We investigate the opportunity of leveraging multi‐material vat photopolymerization printing to manufacture intricate lenses exhibiting permittivity gradients that can increase signal gain in transmitted radiofrequency signals in the X‐ and Ku‐bands. Lenses produced with more distinct low‐loss materials (up to 5) can deliver an 18 dB signal gain with a
Lawrence Romangsuriat, Alexander Peraire‐Bueno, A. John Hart, Randall M. Erb   +3 more
wiley   +1 more source

Research of OFDM communication algorithm of low-voltage power line in coal mine

Gong-kuang zidonghua, 2014
In view of problem that traditional OFDM algorithm based on discrete Fourier transform used in underground low-voltage power lines is prone to produce larger ISI and ICI to influence normal receiving of signal, an OFDM communication algorithm based on ...
WEI Shaoliang, LIU Dahai, CHANG Ying, WANG Xuehui, ZHOU Guangping   +4 more
doaj   +1 more source

Artificial Intelligence‐Assisted Workflow for Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling

Advanced Materials, EarlyView.
AI‐Assisted Workflow for (Scanning) Transmission Electron Microscopy: From Data Analysis Automation to Materials Knowledge Unveiling. Abstract (Scanning) transmission electron microscopy ((S)TEM) has significantly advanced materials science but faces challenges in correlating precise atomic structure information with the functional properties of ...
Marc Botifoll, Ivan Pinto‐Huguet, Enzo Rotunno, Thomas Galvani, Catalina Coll, Payam Habibzadeh Kavkani, Maria Chiara Spadaro, Yann‐Michel Niquet, Martin Børstad Eriksen, Sara Martí‐Sánchez, Georgios Katsaros, Giordano Scappucci, Peter Krogstrup, Giovanni Isella, Andreu Cabot, Gonzalo Merino, Pablo Ordejón, Stephan Roche, Vincenzo Grillo, Jordi Arbiol   +19 more
wiley   +1 more source

Monitoring the Depth of Anesthesia Using Discrete Wavelet Transform and Power Spectral Density

, 2009
This method combines wavelet techniques and power spectral density to monitor the depth of anesthesia (DOA) based on simplified EEG signals. After decomposing electroencephalogram (EEG) signals, the power spectral density is chosen as a feature function ...
Wen, Peng, T. Nguyen-Ky, Nguyen-Ky, T., Li, Yan, Peng Wen, Yan Li   +5 more
core   +1 more source