Results 91 to 100 of about 71,521 (262)
Advanced Optical Materials, EarlyView.A new luminescence mechanism in Cs2NaInCl₆ is revealed through spontaneously formed In3+→In+ centers and Er3+/Yb3+/Sb3+ doping. Tunable visible, near‐infrared, downconversion, and upconversion emissions are demonstrated, while DFT calculations explain the electronic structure.
Inna A. Ivashchenko +10 more
wiley +1 more source
Stress Estimation in Viscous Flows Using an Iterative Tikhonov Regularized Stokes Inverse Model
MathematicsIn this paper, we propose and develop a stationary Stokes Inverse Model (SIM) to estimate the stress distributions that are difficult to measure directly in flows.
Yuanhao Gao, Yang Wang, Jizhou Zhang
doaj +1 more source
Advanced Optical Materials, EarlyView.Linearly polarized incident light with normal incidence creates enhanced optical chirality hotspots on the metasurface. Several orders of magnitude optical chirality enhancement offers a promising route toward highly sensitive, compact chiral spectroscopy.
Anastasia Romashkina +10 more
wiley +1 more source
On the number of singular points of weak solutions to the Navier‐Stokes equations
Communications on Pure and Applied Mathematics, 2001 AbstractWe consider a suitable weak solution to the three‐dimensional Navier‐Stokes equations in the space‐time cylinder Ω × ]0, T[. Let Σ be the set of singular points for this solution and Σ (t) ≡ {(x, t) ∈ Σ}. For a given open subset ω ⊆ Ω and for a given moment of time t ∈]0, T[, we obtain an upper bound for the number of points of the set Σ(t) ⋒ ω.
openaire +3 more sources
Geometry‐Driven Whispering‐Gallery Modes in Self‐Assembled Phosphorescent Organic Microtubes
Advanced Optical Materials, EarlyView.Micelles encapsulating tris(2‐phenylpyridine)iridium(III) self‐assemble into a hollow hexagonal microtube stabilized by a surface passivation layer. The hexagonal cross‐section confines circulating light along its facets, sustaining sharp whispering‐gallery resonances that guide photoluminescence emission under laser excitation.
Do Wan Kim +10 more
wiley +1 more source
Advanced Optical Materials, EarlyView.Each optical system introduces aberrations in the reading of photoluminescence, which makes the signal dependant on the lab equipment. Here, a calibrated system is used to obtain the PLQYs and ratiometric parameters of popular upconverters to be used in thermometry.
Adilet Zhakeyev +5 more
wiley +1 more source
Progress in Earth and Planetary ScienceStokes drift associated with surface waves induces mass transport, which interacts with ocean currents to modify dynamics from situations without waves.
Yasushi Fujiwara +2 more
doaj +1 more source
Advanced Optical Materials, EarlyView.The unique combination of photophysical properties for π‐expanded 1,4‐dihydropyrrolo[3,2‐b]pyrroles (DHPPs) can be reached via a new synthetic approach. π‐Expanded DHPPs possessing electron‐withdrawing functionalities with emission reaching 700 nm, as well as large double helical systems were prepared and investigated.
Damian Kusy +10 more
wiley +1 more source
Optimization of Hydraulic Machinery Bladings by Multilevel CFD Techniques
International Journal of Rotating Machinery, 2005 The numerical design optimization for complex hydraulic machinery bladings requires a high number of design parameters and the use of a precise CFD solver yielding high computational costs.
Susanne Thum, Rudolf Schilling
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Advanced Optical Materials, EarlyView.Donor strength governs the excited‐state character and TADF behavior of donor‐acceptor‐donor borondifluoride curcuminoid derivatives. Increasing donor strength drives a transition from charge‐transfer TADF to a zwitterionic polymethine structure with predominantly local excited‐state emission and suppressed TADF.
Anthony D'Aléo +13 more
wiley +1 more source