Results 71 to 80 of about 36,374 (262)

Universal Conductance Fluctuations in Quantum Anomalous Hall Insulators

open access: yesAdvanced Materials, EarlyView.
Universal conductance fluctuations are observed in mesoscopic quantum anomalous Hall insulators. Two distinct fluctuation patterns are identified, arising from different interference processes of bulk and chiral edge states, respectively. These findings unveil rich quantum interference phenomena in quantum anomalous Hall insulators and provide insights
Peng Deng   +11 more
wiley   +1 more source

Chiral Microneedle Arrays With Terahertz Chiroptical Activity With Chiral‐Plasmon‐Chiral‐Phonon Resonance

open access: yesAdvanced Materials, EarlyView.
ABSTRACT Microneedle arrays (MNAs) is a rapidly emerging technology with broad biomedical applications in drug delivery and biosensing. With sub‐millimeter dimensions and periodicity, MNAs possess geometries nearly ideal for biomedical devices operating within the terahertz (THz) spectral window.
Sang Hyun Lee   +6 more
wiley   +1 more source

Direct Synthesis of High‐Valence Protein@UiO‐66 Composites: Linking Crystallization Pathways to Protein Encapsulation

open access: yesAdvanced Materials, EarlyView.
This work reports a direct, biocompatible method to synthesize UiO‐66, enabling one‐step encapsulation of proteins without compromising crystallinity or activity. Using advanced in situ and ex situ techniques, the study reveals that proteins integrate concurrently with MOF growth, forming crystalline protein@UiO‐66 nanoparticles, and provide insight ...
Jesús Cases Díaz   +5 more
wiley   +1 more source

Resonant Domain Wall Dynamics in a Three‐Dimensional Magnetic Nano Double Helix

open access: yesAdvanced Materials, EarlyView.
3D magnetic nanostructures promise exciting possibilities for magnetization dynamics. However, experimental realizations remain scarce. In nanoprinted cobalt double helices, time‐resolved X‐ray microscopy reveals harmonic domain wall dynamics. Simulations identify the mode and additional higher‐frequency resonances, revealing a rich dynamic landscape ...
Pamela Morales‐Fernández   +15 more
wiley   +1 more source

Design of Pipeline Fast Fourier Transform Processors using 3 Dimensional Integrated Circuit Technology

open access: yes, 2008
Fast Fourier Transform (FFT) processing is an important component of many Digital Signal Processing (DSP) applications and communication systems. We focus on applications requiring large-point FFTs (>1024), and where high-speed of operation has ...
Sule, Ambarish Mukund
core  

High‐Performance Transparent, Deformable, and Recoverable Biomimetic Stevia–PVA Hydrogel Triboelectric Nanogenerator with Machine Learning‐Assisted Motion Recognition

open access: yesAdvanced Materials, EarlyView.
A transparent, deformable stevia–PVA hydrogel triboelectric nanogenerator delivers significantly enhanced mechanical strength and electrical output through biomimetic hydrogen‐bonded networks. Coupled with machine learning–assisted signal recognition, the self‐powered hydrogel enables accurate human‐motion sensing for intelligent wearable and IoT ...
Thien Trung Luu   +5 more
wiley   +1 more source

Fast Algorithms for Discrete Fourier Transform and Discrete Hartley Transform

open access: yes, 2007
離散傅利葉轉換(DFT)與離散哈特利轉換(DHT)的快速演算法已經被研究了釵h年了,最近幾年,split-radix-2/8的快速傅利葉轉換演算法也被發表了,這種演算法的運算複雜度跟以往的split-radix-2/4快速傅利葉轉換的演算法一樣,但是卻可以省下25%的資料讀取與儲存的動作。 在這篇論文中,我們用split-radix-2/8的方式推導出了split vector-radix-2/8二維快速傅利葉轉換的演算法。我們發現跟一維的情況一樣可以省下25%的資料傳輸量,除此之外,跟split ...
Chen, Wei-Yu, 陳威宇
core  

Directional edge and texture representations for image processing [PDF]

open access: yes, 2007
An efficient representation for natural images is of fundamental importance in image processing and analysis. The commonly used separable transforms such as wavelets axe not best suited for images due to their inability to exploit directional ...
Yao, Zhen
core  

Computation of Discrete Fourier Transform (FFT): A Review Article

open access: yes, 2018
This article reviews the computation of discrete Fourier transform which is termed as fast Fourier transform (FFT). It starts with discussion on a few terms used in this transform with one of its classifications followed by the presentation of the ...
Khan, Mohammed Zafar Ali   +5 more
core   +1 more source

Recent Progress in the Phase‐Controlled Synthesis of Ruthenium Nanocrystals for Catalytic Applications

open access: yesAdvanced Materials, EarlyView.
Template effect and kinetic control enable crystal‐phase engineering of Ru nanocrystals, granting access to either metastable fcc‐Ru or stable hcp‐Ru with distinct surface structures, thermal stabilities, and catalytic behaviors. Moreover, the hcp‐Ru can further serve as an epitaxial template to direct Pd and Rh nanocrystals into the metastable hcp ...
Jianlong He   +3 more
wiley   +1 more source

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