Results 121 to 130 of about 95,824 (290)

Image coding by way of wavelets [PDF]

The application of two wavelet transforms to image compression is discussed. It is noted that the Haar transform, with proper bit allocation, has performance that is visually superior to an algorithm based on a Daubechies filter and to the discrete ...
Shahshahani, M.
core   +1 more source

All‐Optical Reconfigurable Physical Unclonable Function for Sustainable Security

Advanced Materials, EarlyView.
An all‐optical reconfigurable physical unclonable function (PUF) is demonstrated using plasmonic coupling–induced sintering of optically trapped gold nanoparticles, where Brownian motion serves as a robust entropy source. The resulting optical PUF exhibits high encoding density, strong resistance to modeling attacks, and practical authentication ...
Jang‐Kyun Kwak, Changgyun Moon, Hyun‐Bin Yu, Sunkook Kim, Dong‐Hwan Kim   +4 more
wiley   +1 more source

Self‐Oscillating Helix Showing Amplified Winding and Unwinding Motions

Advanced Materials, EarlyView.
The hydrogel helix exhibits autonomous oscillation synchronized with the Ru(bpy)32+/3+ redox cycle in the Belousov–Zhabotinsky reaction. Periodic winding–unwinding accompanies magnified motion along one direction within the gel phase. ABSTRACT Helical architectures in nature amplify motion via winding–unwinding.
Taehun Chung, Jaewon Choi, Hyein Kim, Kanghyun Ki, Takahumi Enomoto, Dahyun Lee, Sungbin Shin, Anna Lee, Takamasa Sakai, Young‐Ki Kim, Ryo Yoshida, Youn Soo Kim   +11 more
wiley   +1 more source

Prediction of hot spots in protein-DNA binding interfaces based on discrete wavelet transform and wavelet packet transform. [PDF]

BMC Bioinformatics, 2023
Sun Y, Wu H, Xu Z, Yue Z, Li K.
europepmc   +1 more source

Analog Control of Reconfigurable GHz Resonances from Chiral Spin Texture Ensembles

Advanced Materials, EarlyView.
Tunable microwave components ‐ essential for wireless technology ‐ typically require costly, customized nanofabrication. We show that ambient spin texture ensembles (e.g., magnetic skyrmions) in chiral multilayer films can enable reconfigurable microwave resonators.
T. S. Suraj, Jifei Huang, Hui Ru Tan, Jing Zhou, Abhijit Ghosh, Hang Khume Tan, May Inn Sim, Alexander K. J. Toh, Xiaoye Chen, Anjan Soumyanarayanan   +9 more
wiley   +1 more source

Hybrid Deep Learning and Discrete Wavelet Transform-Based ECG Biometric Recognition for Arrhythmic Patients and Healthy Controls. [PDF]

Sensors (Basel), 2023
Asif MS, Faisal MS, Dar MN, Hamdi M, Elmannai H, Rizwan A, Abbas M.   +6 more
europepmc   +1 more source

Current Switching of Topological Spin Chirality in the van der Waals Antiferromagnet Co1/3TaS2

Advanced Materials, EarlyView.
Spin chirality plays a central role in quantum magnetism, governing spin winding and generating real‐space Berry phases. We propose the intriguing concept of current‐switching spin chirality and demonstrate it via unconventional intrinsic self‐spin‐orbit‐torque in pristine Co1/3TaS2, purely by electrical current and with high energy efficiency.
Kai‐Xuan Zhang, Seungbok Lee, Woonghee Cho, Je‐Geun Park   +3 more
wiley   +1 more source

Improvements in the Wavelet Transform and Its Variations: Concepts and Applications in Diagnosing Gearbox in Non-Stationary Conditions

Applied Sciences
Wavelet transform is a powerful time-frequency-based analysis method often used in gear fault diagnostics. The development of wavelet transform is closely linked to the improvement of resolution.
Trong-Du Nguyen, Phong-Dien Nguyen
doaj   +1 more source

Screening of Discrete Wavelet Transform Parameters for the Denoising of Rolling Bearing Signals in Presence of Localised Defects. [PDF]

Sensors (Basel), 2022
Brusa E, Delprete C, Gargiuli S, Giorio L.   +3 more
europepmc   +1 more source

Wavelet Analysis and Denoising: New Tools for Economists [PDF]

This paper surveys the techniques of wavelets analysis and the associated methods of denoising. The Discrete Wavelet Transform and its undecimated version, the Maximum Overlapping Discrete Wavelet Transform, are described.
Iolanda Lo Cascio
core