Results 131 to 140 of about 1,741,443 (291)

Azobenzene's Cross‐Scale Optics and Photonics: Molecular Photoswitching, Mesoscopic Material Motions, and Adaptive Devices

Advanced Materials, EarlyView.
Azobenzene photoswitches translate molecular‐scale E/Z photoisomerization into macroscopic material responses and device‐level photonic functions. This Review highlights how azobenzene research has evolved from molecular photochemistry to photoalignment, mass migration, photomechanics, and heat release, ultimately enabling holography, reconfigurable ...
Heeju Son, Soyul Kwak, Heerin Noh, Minsang Kim, Doyeon Noh, Subhayan Chakraborty, Jaewon Lee, YongDeok Cho, Kyeongsoo Kim, Taewoong Eom, Moonyoung Kim, Jangwon Kim, Hoyoung Lee, Soyoung Lee, Jaehun Kim, Grace G. D. Han, Shin‐Tson Wu, Stefano Oscurato, Arri Priimagi, Marina Saphiannikova, Seungwoo Lee   +20 more
wiley   +1 more source

Robust motion estimation under varying illumination

, 2008
The optical-flow approach has emerged as a major technique for estimating scene and object motion in image sequences. However, the results obtained by most optical flow techniques are strongly affected by motion discontinuities and by large illumination ...
Aleix M. Martínez, Avi C. Kak, Yeon-ho Kim   +2 more
core  

Correlated Charge Transport in an Organic Coulomb Glass

Advanced Materials, EarlyView.
ABSTRACT Advances in the development of organic field‐effect transistors (OFETs), electrically gated organic semiconductors (EGOFETs), and organic electrochemical transistors (OECTs) allow for the operation of these devices at very high charge‐carrier densities, where Coulomb interactions between carriers can be expected to become significant.
Magdalena Sophie Dörfler, Heinz Bässler, Harald Oberhofer, Anna Köhler   +3 more
wiley   +1 more source

Parameter estimation of multiple pulse trains for illumination sensing

, 2010
We consider illumination sensing in a light emitting diode (LED) lighting system based on frequency division multiplexing (FDM). In the FDM scheme, LEDs render periodical illumination pulses at different frequencies with prescribed duty cycles.
Bergmans, Jan W.M., Hongming Yang, Tim C. W. Schenk, Schenk, Tim C.W., Jan W. M. Bergmans, Yang, Hongming, Ashish Pandharipande, Pandharipande, Ashish; id_orcid, Pandharipande, Ashish   +8 more
core   +1 more source

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Impacts of Variable Illumination and Image Background on Rice LAI Estimation Based on UAV RGB-Derived Color Indices

Applied Sciences
Variations in illumination and image background present challenges for using UAV RGB imagery. Existing studies often overlook these issues, especially in rice.
Binfeng Sun, Yanda Li, Junbao Huang, Zhongsheng Cao, Xinyi Peng   +4 more
doaj   +1 more source

Rethinking Charge Transport and Recombination in Donor‐Diluted Organic Solar Cells

Advanced Materials, EarlyView.
Organic solar cells with 1–45% PM6 content in Y12 were studied to link structure and charge dynamics to performance. The conductivity follows a 3D percolation model without a sharp threshold. Donor dilution preserves the photogeneration yield, but limits the fill factor due to transport resistance losses.
Chen Wang, Christopher Wöpke, Toni Seiler, Jared Faisst, Mathias List, Meike Kuhn, Bekcy Joseph, Alexander Ehm, Dietrich R. T. Zahn, Yana Vaynzof, Eva M. Herzig, Roderick C. I. Mackenzie, Uli Würfel, Maria Saladina, Carsten Deibel   +14 more
wiley   +1 more source

Multiple linear regression based illumination normalization for non-uniform light image thresholding

e-Prime: Advances in Electrical Engineering, Electronics and Energy
Thresholding-based two-class image binarization is one of the simplest and most popular approaches. However, the performance of global thresholding degrades under non-uniform lighting conditions.
Tapaswini Pattnaik, Priyadarshi Kanungo, Tejaswini Kar, Prabodh Kumar Sahoo   +3 more
doaj   +1 more source

High‐Entropy Ceramic‐Enhanced Deformable Triboelectric Nanogenerator for Noncontact Biomechanical and Raindrop Energy Harvesting

Advanced Materials, EarlyView.
A large‐area, deformable high‐entropy‐ceramic (HEC)‐doped triboelectric nanogenerator with a trilayer architecture is developed, consisting of an HEC‐doped triboelectric layer, a graphite‐like textile charge‐storage layer, and stretchable carbon black electrodes.
Shengyou Li, Wei‐Chen Peng, Syun‐Hong Chou, Zhi‐Xian Yan, Jiann‐Yeu Chen, Dun‐Jie Jhan, Wei‐Chun Yang, Shi‐Hong Chen, Yi‐Lin Huang, Cheng‐Hung Tsai, Ming‐Yen Lu, Heng‐Jui Liu, Cheolmin Park, Ying‐Chih Lai   +13 more
wiley   +1 more source

UAV-LIENet: a low-light UAV image enhancement network via illumination estimation and guidance

Journal of King Saud University: Computer and Information Sciences
Low-light Unmanned Aerial Vehicle (UAV) image enhancement is crucial for downstream tasks such as object detection and navigation. However, low-light UAV images often have complex illumination patterns and high noise levels. Existing mainstream low-light
Yueqing Kang, Ruitao Lu, Xiaogang Yang, Zhenhao Cheng, Zhanhong Zhuo, Jiwei Fan   +5 more
doaj   +1 more source