Buscar
Mostrando ítems 1-10 de 7040
Polarity effects in unsupported polar nanoribbons
(American Physical Society, 2013-05)
We analyze the characteristics of polarity in unsupported nanoribbons with zigzag edges, by a combination of analytic models, semiempirical Hartree-Fock simulations, and first-principles approach. We consider two materials ...
Building Phrase Polarity Lexicons for Sentiment Analysis
Many approaches to sentiment analysis benefit from polarity lexicons. Most polarity lexicons include a list of polar (positive/negative) words, and sentiment analysis systems attempt to capture the occurrence of those words ...
Polar caps during geomagnetic polarity reversals
(Wiley Blackwell Publishing, Inc, 2019-02)
Changes in the Earth’s magnetic field can deeply modify the polar caps and auroral zones, which are the regions of most frequent precipitation of energetic particles. The present field is characterized by a dominant dipole ...
Kinetics of the polarization reversal process in a non-constant applied electric field and the generalized superposition principle
(1996-12-01)
We analyze the results on polarization reversal by H. von Seggern and T. T. Wang (J. Appl. Phys., 56, 2448 (1984)) under the assumption of validity of a superposition principle in terms of a conveniently defined intrinsic ...
Kinetics of the polarization reversal process in a non-constant applied electric field and the generalized superposition principle
(1996-12-01)
We analyze the results on polarization reversal by H. von Seggern and T. T. Wang (J. Appl. Phys., 56, 2448 (1984)) under the assumption of validity of a superposition principle in terms of a conveniently defined intrinsic ...
3D radiative transfer of intrinsically polarized dust emission based on aligned aspherical grains
(Oxford University Pres, 2017)
(Sub-)millimetre observations of the polarized emission of aligned aspherical dust grains enable us to study the magnetic fields within protoplanetary disc. However, the interpretation of these observations is complex. One ...
When do populations polarize? An explanation
(Universidad de Montevideo, Facultad de Ciencias Empresariales y Economía, Departamento de Economía, 2018)
Numerous experiments demonstrate attitude polarization. For instance, Lord, Ross & Lepper presented subjects with the same mixed evidence on the deterrent effect of the death penalty. Both believers and skeptics of its ...