Results 41 to 50 of about 431,604 (288)

Mapping Nanoscale Buckling in Atomically Thin Cr2Ge2Te6

Advanced Functional Materials, EarlyView.
Atomic‐resolution STEM is used to resolve nanoscale buckling in monolayer Cr2Ge2Te₆. A noise‐robust image analysis reconstructs three‐dimensional lattice distortions from single plan‐view images, revealing pronounced defect‐driven nm‐scale out‐of‐plane buckling.
Amy Carl, Nicholas Clark, David G. Hopkinson, Matthew Hamer, Matthew Watson, Laxman Nagireddy, James E. Nunn, Alexei Barinov, Yichao Zou, William Thornley, Casey Cheung, Wendong Wang, Sam Sullivan‐Allsop, Xiao Li, Astrid Weston, Eli G. Castanon, Andrey V Kretinin, Cephise Cacho, Neil R. Wilson, Sarah J. Haigh, Roman Gorbachev   +20 more
wiley   +1 more source

Firmamento: A Multimessenger Astronomy Tool for Citizen and Professional Scientists

The Astronomical Journal
Firmamento ( https://firmamento.hosting.nyu.edu ) is a new-concept, web-based, and mobile-friendly data analysis tool dedicated to multifrequency/multimessenger emitters, as exemplified by blazars.
Dhurba Tripathi, Paolo Giommi, Adriano Di Giovanni, Rawdha R. Almansoori, Nouf Al Hamly, Francesco Arneodo, Andrea V. Macciò, Goffredo Puccetti, Ulisses Barres de Almeida, Carlos Brandt, Simonetta Di Pippo, Michele Doro, Davit Israyelyan, A. M. T. Pollock, Narek Sahakyan   +14 more
doaj   +1 more source

Harnessing the Orientation of Columnar Discotic Liquid Crystals for Narrowband Blue Emission with Enhanced Out‐Coupling Efficiency Toward Improvement of SP‐OLEDs Performance

Advanced Functional Materials, EarlyView.
Solution‐processed OLEDs containing discotic liquid‐crystalline MR‐TADF emitters are reported. Supramolecular self‐assembly induces homeotropic columnar alignment, enforcing preferential horizontal orientation of the emitter transition dipole moment in spin‐coated films, which leads to an enhancement in the device light outcoupling efficiency while ...
Joydip De, Abhishek Kumar Gupta, Džiugas Litvinas, Francisco Tenopala‐Carmona, Matthias Lehmann, Malte C. Gather, Eli Zysman‐Colman   +6 more
wiley   +1 more source

Efficient Searches for Small Signals across Two-channel Noisy Data: A Challenge in Big-data Observations

The Astrophysical Journal Supplement Series
Searching for novel small signals in noisy data is preferably pursued by correlation in two or more independently operating channels. Signals of potential interest exist in tails beyond κσ , where κ denotes a multiple of the standard deviation σ of the ...
Maryam Aghaei Abchouyeh, Maurice H. P. M. van Putten, Seyong Kim   +2 more
doaj   +1 more source

L-dwarf Detection from SDSS Images using Improved Faster R-CNN

The Astronomical Journal, 2023
We present a data-driven approach to automatically detect L dwarfs from Sloan Digital Sky Survey (SDSS) images using an improved Faster R-CNN framework based on deep learning.
Zhi Cao, Zhenping Yi, Jingchang Pan, Hao Su, Yude Bu, Xiao Kong, Ali Luo   +6 more
doaj   +1 more source

A Digital Low Dispersion Spectral Library Covering the 3500-7500AA Region Using the SAAO Radcliffe 1.9m Telescope's Cassegrain Spectrograph

, 2013
We have created a digital spectral library, using low resolution optical spectra, of photometric and spectral standard stars. The data were acquired using the Cassegrain Spectrograph installed on the 1.9m Radcliffe telescope at the South African ...
James, David
core   +1 more source

Exploration of Large Digital Sky Surveys [PDF]

, 2000
We review some of the scientific opportunities and technical challenges posed by the exploration of the large digital sky surveys, in the context of a Virtual Observatory (VO).
A. A. Mahabal, D. Curkendall, J. Jacob, Observatorio Nacional, P. Stolorz, R. Granat, R. J. Brunner, R. R De, R. R. Gal, Rio De Janeiro, S. C. Odewahn, S. Castro, S. G. Djorgovski   +12 more
core   +3 more sources

Uncovering the Origin of Efficiency Roll‐Off in TADF OLEDs

Advanced Functional Materials, EarlyView.
OLEDs based on thermally activated delayed fluorescent (TADF) materials often suffer from a severe drop in efficiency at high brightness levels. This work presents a technique to uncover the source of this efficiency drop, and quantifies the exciton‐exciton and exciton‐polaron annihilation processes responsible for efficiency losses in our TADF OLEDs ...
Liam G. King, Kou Yoshida, Arvydas Ruseckas, Ifor D. W. Samuel   +3 more
wiley   +1 more source

An Ultrawide Bandwidth Digital Backend System Based on PFB Algorithm for QTT

The Astronomical Journal
For the planning of the QiTai radio Telescope ultrawide bandwidth low-frequency pulsar receiving system, we designed and implemented a Field-Programmable Gate Array (FPGA)+CPU/GPU hybrid architecture digital backend system based on the Polyphase ...
Hai-long Zhang, Ya-zhou Zhang, Shao-cong Guo, Xu Du, Na Wang, Jie Wang, Xin-chen Ye, Han Wu, Jian Li, Xin Pei, Qiao Meng   +10 more
doaj   +1 more source

Comparison between Windowed FFT and Hilbert-Huang Transform for Analyzing Time Series with Poissonian Fluctuations: A Case Study [PDF]

, 2006
Hilbert-Huang Transform (HHT) is a novel data analysis technique for nonlinear and non-stationary data. We present a time-frequency analysis of both simulated light curves and an X-ray burst from the X-ray burster 4U 1702-429 with both the HHT and the ...
Dong Han, Feng H, Hu G S, Markwardt C B, Nair K K, Shuang-Nan Zhang   +5 more
core   +3 more sources