Results 61 to 70 of about 207,262 (276)
An Improved Infrared/Visible Fusion for Astronomical Images
Advances in Astronomy, 2015 An undecimated dual tree complex wavelet transform (UDTCWT) based fusion scheme for astronomical visible/IR images is developed. The UDTCWT reduces noise effects and improves object classification due to its inherited shift invariance property.
Attiq Ahmad +3 more
doaj +1 more source
Photometry of two unusual A supergiant systems in the Small Magellanic Cloud
, 2010 We present multiwavelength broadband photometry and V, I time resolved photometry for two variable bright stars in the SMC, OGLE004336.91-732637.7 (SMC-SC3) and OGLE004633.76-731204.3 (SMC-SC4).
Kołaczkowski, Z. +4 more
core +1 more source
Large Anomalous and Topological Hall Effect and Nernst Effect in a Dirac Kagome Magnet Fe3Ge
Advanced Functional Materials, EarlyView.Fe3Ge, a Kagome‐lattice magnet, exhibits remarkable anomalous Hall and Nernst effects, with transverse thermoelectric conductivity surpassing or comaprable to some well‐known ferromagnets. First‐principles calculations attribute these to Berry curvature from massive Dirac gaps. Additionally, topological Hall and Nernst signals emerge from field‐induced
Chunqiang Xu +11 more
wiley +1 more source
Geochemistry, Geophysics, GeosystemsAstronomical cycles recorded in stratigraphic sequences offer a powerful data source to estimate Earth's axial precession frequency k, as well as the frequency of rotation of the planetary perihelia (gi) and of the ascending nodes of their orbital planes
A. Malinverno, S. R. Meyers
doaj +1 more source
Single Image Super-Resolution Using Compressive Sensing With a Redundant Dictionary
IEEE Photonics Journal, 2015 In medical imaging and astronomical observation, high-resolution (HR) images are urgently desired and required. In recent years, many researchers have proposed various ways to achieve the goal of image super-resolution (SR), ranging from simple linear ...
Yicheng Sun +4 more
doaj +1 more source
Irregular Layout for a Satellite’s Interferometric Array
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 We address the optimization problem of antenna placement on satellite-mounted interferometric synthetic-aperture instruments. In classic designs, the antennas on satellites are aligned regularly on the satellite’s frame.
Paul Krzakala +10 more
doaj +1 more source
The IPAC Image Subtraction and Discovery Pipeline for the intermediate Palomar Transient Factory [PDF]
, 2016 We describe the near real-time transient-source discovery engine for the intermediate Palomar Transient Factory (iPTF), currently in operations at the Infrared Processing and Analysis Center (IPAC), Caltech.
Barlow, Tom +19 more
core +2 more sources
Defects Dynamic in Photo‐Excited CeO2 and their Influence on CO2 Photoreduction
Advanced Functional Materials, EarlyView.X‐ray photoelectron spectroscopy study under light excitation is presented to track the defect dynamic (Ce4+ to Ce3+) in CeO2. Surface enhanced Raman spectroscopy confirmed the key role of Ce3+ states in controlling charge and energy transfer across the CeO2‐dye molecule interface.
Rambabu Yalavarthi +3 more
wiley +1 more source
Photon orbital angular momentum and torque metrics for single telescopes and interferometers
, 2012 Context. Photon orbital angular momentum (POAM) is normally invoked in a quantum mechanical context. It can, however, also be adapted to the classical regime, which includes observational astronomy. Aims.
Elias +5 more
core +1 more source
Deconvolution under Poisson noise using exact data fidelity and synthesis or analysis sparsity priors [PDF]
, 2011 In this paper, we propose a Bayesian MAP estimator for solving the deconvolution problems when the observations are corrupted by Poisson noise. Towards this goal, a proper data fidelity term (log-likelihood) is introduced to reflect the Poisson ...
Dupé, François-Xavier +2 more
core +4 more sources