Results 21 to 30 of about 7,273,682 (308)

Recent advances on organic blue thermally activated delayed fluorescence (TADF) emitters for organic light-emitting diodes (OLEDs)

open access: yesBeilstein Journal of Organic Chemistry, 2018
The design of highly emissive and stable blue emitters for organic light emitting diodes (OLEDs) is still a challenge, justifying the intense research activity of the scientific community in this field. Recently, a great deal of interest has been devoted
Thanh-Tuân Bui   +4 more
doaj   +1 more source

Image – écrit – traduction

open access: yesMiędzy Oryginałem a Przekładem, 2019
Painting – Text – Translations. Representation of the Colour Blue in Descriptions of Paintings in Art Books Colour is a basic category for describing a painting.
Justyna Bajda
doaj   +1 more source

The symbolic meaning of turquoise in Iranian culture

open access: yesӘл-Фараби Атындағы Қазақ Ұлттық Университеті хабаршы шығыстану сериясы, 2021
This article is intended to determine the symbolic meaning of turquoise in Iranian culture with the help of extralinguistic materials. Today, gemstones are not just ordinary useful minerals, because they can become the main object of complex research as ...
K.B. Zhetpisbayeva, B.N. Zhubatova
doaj   +1 more source

pXRF Data Evaluation Methodology for On-Site Analysis of Precious Artifacts: Cobalt Used in the Blue Decoration of Qing Dynasty Overglazed Porcelain Enameled at Customs District (Guangzhou), Jingdezhen and Zaobanchu (Beijing) Workshops

open access: yesHeritage, 2022
In a noninvasive determination, Raman and XRF analyses showed the possibility of identifying specific phases and elements characteristic of the use of recipes and ingredients imported from Europe, according to the information documented in Chinese and ...
Philippe Colomban   +4 more
doaj   +1 more source

The wave equation on the Schwarzschild metric II: Local decay for the spin 2 Regge Wheeler equation

open access: yes, 2006
Odd-type spin 2 perturbations of Einstein's equation can be reduced to the scalar Regge-Wheeler equation. We show that the weighted norms of solutions are in L^2 of time and space. This result uses commutator methods and applies uniformly to all relevant
A. Soffer, Bachelot A., Blue P., P. Blue
core   +1 more source

Uniform Decay of Local Energy and the Semi-Linear Wave Equation on Schwarzchild Space

open access: yes, 2005
We provide a uniform decay estimate of Morawetz type for the local energy of general solutions to the inhomogeneous wave equation on a Schwarzchild background.
C. Morawetz   +7 more
core   +1 more source

The Application of Cathodoluminescence (CL) for the Characterization of Blue Pigments

open access: yesHeritage
The combined application of Cathodoluminescence (CL) with Scanning Electron Microscopy (SEM) on paintings and painted surfaces has the potential to identify both organic and inorganic pigments on a micrometre or even nanometre scale.
Eleni Palamara   +5 more
doaj   +1 more source

Some remarks on a pair of seemingly unrelated regression models

open access: yesOpen Mathematics, 2019
Linear regression models are foundation of current statistical theory and have been a prominent object of study in statistical data analysis and inference.
Hou Jian, Zhao Yong
doaj   +1 more source

Effective La-Na Co-Doped TiO2 Nano-Particles for Dye Adsorption: Synthesis, Characterization and Study on Adsorption Kinetics

open access: yesNanomaterials, 2019
The mesoporous La-Na co-doped TiO2 nanoparticles (NPs) have been synthesized by non-aqueous, solvent-controlled, sol-gel route. The substitutional doping of large sized Na+1 and La+3 at Ti4+ is confirmed by X-ray diffraction (XRD) and further supported ...
Inderjeet Singh, Balaji Birajdar
doaj   +1 more source

Faint Blue Galaxies [PDF]

open access: yes, 1997
The physical properties of the faint blue galaxy population are reviewed in the context of observational progress made via deep spectroscopic surveys and Hubble Space Telescope imaging of field galaxies at various limits, and theoretical models for the ...
Ellis, Richard S.
core   +3 more sources

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