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Mostrando ítems 11-20 de 1607
Normal forms and global phase portraits of quadratic and cubic integrable vector fields having two nonconcentric circles as invariant algebraic curves
(2017-07-03)
In this paper, we give the normal form of all planar polynomial vector fields of degree d ≤ 3 having two nonconcentric circles C1 and C2 as invariant algebraic curves and the function H=Cβ 1 Cα 2, with α and β real values, ...
Stabilization of cubic and rhombohedral phases of zinc hexacyanocobaltate (III)
(Microporous and Mesoporous Materials, 2013-01-16)
Absence of relaxor-like ferroelectric phase transition in (Pb,Sr)TiO3 thin films
(Springer, 2005-02-01)
We have performed dielectric and micro-Raman spectroscopy measurements in the 298 - 673 K temperature range in polycrystalline Pb0.50Sr0.50TiO3 thin films prepared by a soft chemical method. The phase transition have been ...
Absence of relaxor-like ferroelectric phase transition in (Pb,Sr)TiO3 thin films
(Springer, 2005-02-01)
We have performed dielectric and micro-Raman spectroscopy measurements in the 298 - 673 K temperature range in polycrystalline Pb0.50Sr0.50TiO3 thin films prepared by a soft chemical method. The phase transition have been ...
An effective mosquito-repellent topical product from liquid crystal-based tea tree oil
(2019-02-01)
Diseases such as dengue, malaria, yellow fever and others transmitted by culicides determine high rates of morbidity and mortality, especially in tropical countries. An alternative to avoid bites is the use of repellents. ...
Preparation and characterization of spherical yttrium iron garnet via coprecipitation
(2001-12-01)
The purpose of this work is to obtain spherical particles yttrium iron garnet (YIG) by coprecipitation technique. The spherical particles were obtained from either nitrate or chloride salt solutions by controlling the ...
Preparation and characterization of spherical yttrium iron garnet via coprecipitation
(2001-12-01)
The purpose of this work is to obtain spherical particles yttrium iron garnet (YIG) by coprecipitation technique. The spherical particles were obtained from either nitrate or chloride salt solutions by controlling the ...