Results 31 to 40 of about 254,418 (269)

Influence of current density, anodization time, and illumination on the thickness of porous silicon in wafers with the built-in p–n junction and its photoluminescence

open access: yesSt. Petersburg Polytechnical University Journal: Physics and Mathematics, 2022
The formation of a porous silicon (por-Si) layer in a thin p-type layer epitaxially grown on n-type silicon, at two anodizing current densities and different anodizing times is studied and a comparison is made of transverse cleavages, surface morphology,
Yan Dmitriy   +3 more
doaj   +1 more source

25 W of average power at 172 nm in the vacuum ultraviolet from flat, efficient lamps driven by interlaced arrays of microcavity plasmas

open access: yesAPL Photonics, 2017
More than 25 W of average power and >800 W of peak power have been generated at λ=172 nm (hν=7.2 eV) in the vacuum ultraviolet (VUV) from the Xe2 molecule in flat, 10 × 10 cm2 lamps having an active area and volume of 80 cm2 and 350 mW cm−2 in 40–60 μJ ...
S.-J. Park   +4 more
doaj   +1 more source

Review of models of food resources evaluation of the forests of central Russia [PDF]

open access: yesВопросы лесной науки, 2019
The article analyzes the most favourable conditions for the growth and fruit bearing of berries and mushrooms; studies yield indices of food resources; examines Russian and foreign yield capacity models of forest food resources.
A.A. Dulina, S.I. Chumachenko
doaj   +1 more source

Mutual illumination

open access: yesProceedings CVPR '89: IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2003
The authors report theoretical and experimental results which underline the importance of mutual illumination to visual modules dealing with shape and with surface lightness. The experiments are in good agreement with results obtained with a simple theoretical model.
Forsyth, D, Zisserman, A
openaire   +1 more source

Generalized synchronization-based multiparameter estimation in modulated time-delayed systems

open access: yesAIP Advances, 2011
We propose a nonlinear active observer based generalized synchronization scheme for multiparameter estimation in time-delayed systems with periodic time delay.
Dibakar Ghosh, Bidyut K. Bhattacharyya
doaj   +1 more source

Separate effects of background and illumination on lightness [PDF]

open access: yesPsihologija, 2007
Four experiments attempted to establish an effect of context on lightness. Lightness is one of the dimensions of color and it varies from black to white. Most of our stimuli were inspired by simultaneous lightness contrast illusion. First two experiments
Zdravković Sunčica
doaj   +1 more source

Illumination by floodlights

open access: yesComputational Geometry, 1998
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Steiger, William, Streinu, Ileana
openaire   +2 more sources

Design of LED Street Lighting Adapted for Free-Form Roads

open access: yesIEEE Photonics Journal, 2017
Street lighting, which is one of the main players in energy waste and light pollution at night, still faces the challenge of efficient lighting of roadways with curved and twisted shapes.
Ching-Cherng Sun   +6 more
doaj   +1 more source

Phacoemulsification in eyes with corneal opacities after deep anterior lamellar keratoplasty [PDF]

open access: yesInternational Journal of Ophthalmology, 2019
To evaluate the maneuverability and efficacy of phacoemulsification and intraocular lens (IOL) implantation in eyes with corneal opacities after deep anterior lamellar keratoplasty (DALK), twelve eyes of 12 patients with mild to moderate corneal ...
Hui Lin   +7 more
doaj   +1 more source

Comparative analysis of aperture averaging & receiver diversity schemes in FSO channel performance under high scintillation regime

open access: yesDiscover Electronics
High Scintillation is a major problematic issue for Free Space Optical Communication (FSOC) system. Consequently, in this case, the Single Input & Single Output (SISO) optical channel performance has been degraded.
Shibabrata Mukherjee   +2 more
doaj   +1 more source

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