We investigated the properties of alternating current (AC)-driven electroluminescence from (Ba0.4Ca0.6)TiO₃:Pr3+ diphase polycrystal-based device. The results of crystal phases and micrographs, and the symmetrical dual emissions in one AC cycle, indicate the spontaneous formation of a dielectric/phosphor/dielectric sandwich microstructure in (Ba0.4Ca0.6)TiO₃:Pr3+. The electroluminescent device ...

‎Assume that $A$ is a Banach algebra‎. ‎We define the‎ ‎$beta-$topology and the $gamma-$topology on the space $QM_{el}(A^{*})$ of all bounded extended left quasi-multipliers of $A^{*}.$‎ ‎We establish further properties of $(QM_{el}(A^{*}),gamma)$ when $A$ is a $C^{*}-$algebra‎. ‎In particular‎, ‎we characterize the $gamma-$dual‎ ‎of $QM_{el}(A^{*})$ and prove that $(QM_{el}(A^{*}),gamma)^{*},$...

The very strong 1997–98 El Niño caused dramatic worldwide changes to weather patterns, such as drought in Indonesia, extreme rains in Peru and Ecuador, and a shutdown of the Atlantic hurricane season (Bell and Halpert 1998). While past El Niño events have also produced similar though not as large effects, this was the first El Niño in which national meteorological centers made accurate forecast...

We report the synthesis, structure, and photophysical and electroluminescent (EL) properties of a series of heteroleptic bis(pyridylphenyl)iridium(III) complexes with various ancillary guanidinate ligands. The reaction of the bis(pyridylphenyl)iridium(III) chloride [(ppy)(2)Ir(μ-Cl)](2) with the lithium salt of various guanidine ligands Li{(N(i)Pr)(2)C(NR(1)R(2))} at 80 °C gave in 60-80% yield ...

Peruvians Sick of El Nifio As Peruvian officials braced for the effects of El Ninio in 1997, they suspected they might be hit with a rash of diarrhea cases. They were correct, as the diarrhea caseload in children doubled during the worst stretches of a 16-month period of above-average temperatures. An international team of researchers led by William Checkley, a researcher in the Department of I...

[1] Recent studies have suggested that El Niño‐Southern Oscillation (ENSO) may have a considerable impact on Northern Hemisphere wintertime stratospheric conditions. Notably, during El Niño the stratosphere is warmer than during ENSO‐neutral winters, and the polar vortex is weaker. Opposite‐signed anomalies have been reported during La Niña, but are considerably smaller in amplitude than during...

During 2009/2010 growing season, a survey was conducted in three regions where potato was intensively cultivated in three different governorates. These were ElNubaria, El-Salheya and El-Sheikh Zaied in El-Behera, ElSharkia and El-Ismailia governorates respectively. The causal common scab isolates of Streptomyces scabies recovered were isolated from potato tubers showing different scab symptoms ...

Recharge of the alluvial aquifers flooring Wadi El-Arish in central and northern Sinai, Egypt was investigated. A hydrological model that combined the spatial and temporal distribution of rainfall, suitable infiltration parameters, and appropriate sub-basin unit hydrographs to estimate rainfall excess, transmission losses along stream networks, and downstream runoff was developed. The Wadi El-A...

A series of printable UV emitting ionic bifluorene derivatives have been prepared incorporating pendent alkylimidazolium groups. Herein, we detail the synthesis compounds and methods used in device fabrication. We show how ink formulation is improved by increasing solubility active through extension alkyl chain length switching counter ion from PF6− to CF3SO3−. also organic light electrochemica...