Results 11 to 20 of about 1,053,086 (266)

Generalized far-field integral

open access: yesOptics Express, 2021
The propagation of light in homogeneous media is a crucial technology in optical modeling and design as it constitutes a part of the vast majority of optical systems. Any improvements in accuracy and speed are therefore helpful. The far-field integral is one of the most widely used tools to calculate diffraction patterns.
Zongzhao Wang   +3 more
openaire   +2 more sources

Far-Field Autofluorescence Nanoscopy [PDF]

open access: yesNano Letters, 2010
We demonstrate far-field optical imaging at the nanoscale with unlabeled samples. Subdiffraction resolution images of autofluorescent samples are obtained by depleting the ground state of natural fluorophores by transferring them to a metastable dark state and simultaneously localizing those fluorophores that are transiently returning.
Bierwagen J   +6 more
openaire   +6 more sources

Hydrogen Sensor: Detecting Far-Field Scattering of Nano-Blocks (Mg, Ag, and Pd)

open access: yesSensors, 2020
Hydrogen sensor technologies have been rapidly developing. For effective and safe sensing, we proposed a hydrogen sensor composed of magnesium (Mg), silver (Ag), and palladium (Pd) nano-blocks that overcomes the spectral resolution limit.
Eunso Shin   +3 more
doaj   +1 more source

Far-Field and Non-Intrusive Optical Mapping of Nanoscale Structures

open access: yesNanomaterials, 2022
Far-field high-density optics storage and readout involve the interaction of a sub-100 nm beam profile laser to store and retrieve data with nanostructure media.
Guorong Guan   +6 more
doaj   +1 more source

Far-field optical nanoscopy [PDF]

open access: yes2010 IEEE Photinic Society's 23rd Annual Meeting, 2007
In 1873, Ernst Abbe discovered what was to become a well-known paradigm: the inability of a lens-based optical microscope to discern details that are closer together than half of the wavelength of light. However, for its most popular imaging mode, fluorescence microscopy, the diffraction barrier is crumbling.
openaire   +5 more sources

Far-Field Speaker Recognition

open access: yes2006 IEEE International Conference on Acoustics Speed and Signal Processing Proceedings, 2006
In this paper we study robust speaker recognition in far-field microphone situations such as meeting scenarios. By applying reverberation compensation and feature warping we achieved significant improvements under mismatched training-testing conditions. To capture useful information from multiple distant microphones, two approaches for multiple channel
Jin, Qin, Pan, Yue, Schultz, Tanja
openaire   +7 more sources

Study on the Propagation Characteristics of Partial Discharge in Switchgear Based on Near-Field to Far-Field Transformation

open access: yesEnergies, 2018
Ultra-high frequency (UHF) electromagnetic (EM) signals generated by the partial discharge (PD) process of high-voltage equipment are now widely used in PD detection.
Yang Qi   +6 more
doaj   +1 more source

Dynamic response of structures located in near-field and far-field regions using IDA and MIDA

open access: yesMagazine of Civil Engineering, 2021
In the current research project, an effort is made so as to investigate the capability of the innovative Modal Incremental Dynamic Analysis (MIDA) method considering 3D structural models, the effect of plan irregularities and near-field earthquake ...
Nader Fanaie, Hamidreza Mehdipanah
doaj   +1 more source

Field Characterization of Landslide-Induced Surge Waves Based on Computational Fluid Dynamics

open access: yesFrontiers in Physics, 2022
Numerical simulation analysis of landslide-induced surge wave field characteristics offers great insights for engineering practices and is crucial for studying reservoir landslide disaster warning, prevention, and control.
Rubin Wang   +7 more
doaj   +1 more source

The Far‐Field Hubble Constant

open access: yesThe Astrophysical Journal, 1998
18 pages; figure[1-2,7-9].ps are EPS files included in body of text, figure[3-6].jpg are JPEG images not included; LaTeX (AASTeX v4.0); Submitted to The Astrophysical Journal. Compressed PostScript of entire paper with all figures included is available at ftp://mars.tuc.noao.edu/sbf/hubble.ps ...
Lauer, Tod R.   +4 more
openaire   +2 more sources

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