Results 71 to 80 of about 233,826 (182)
Topological polarisation states
Frontiers in Physics, 2023 Polarisation states are described by spin expectation values, known as Stokes parameters, the trajectories of which in a rotationally symmetric system form a sphere named after Poincaré. Here, we show that the trajectories of broken rotational symmetric systems can exhibit distinct topological structures in polarisation states.
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HST optical polarimetry of the Vela pulsar & nebula
, 2014 Polarisation measurements of pulsars offer an unique insight into the geometry of the emission regions in the neutron star magnetosphere. Therefore, they provide observational constraints on the different models proposed for the pulsar emission ...
Mignani, R. P., Moran, P., Shearer, A.
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W polarisation beyond helicity fractions in top quark decays [PDF]
, 2010 We calculate the density matrix for the decay of a polarised top quark into a polarised W boson and a massive b quark, for the most general Wtb vertex arising from dimension-six gauge-invariant effective operators.
Aad +68 more
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Frontiers in PhysicsStokes parameters (S) on the Poincaré sphere are very useful values to describe the polarisation state of photons. However, the fundamental principle on the nature of polarisation is not completely understood, yet, because we have no concrete consensus ...
Shinichi Saito
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Political polarisation compared: creating the comparative political polarisation index
European Political Science, 2022 Political polarisation is a pressing political issue, as it can worsen democracy and has been rising in many countries in the past two decades. However, the exact scope of the problem is unclear, because conflicting measurements and conceptualisations have created disagreement about which countries are polarised.
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Static nuclear polarisation and polarised targets
Hyperfine Interactions, 1985 The possibilities and limitations of performing experiments with statically polarised targets are discussed. The employment of both neutron and proton beams of various energies is considered.
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Justicia, medios de comunicación y polarización política. El caso Colombiano
Trayectorias Humanas Trascontinentales, 2020 Luego de un tortuoso proceso de paz que terminó con una confrontación armada con la guerrilla Farc-EP-, una vez firmado el acuerdo en septiembre de 2016, se desencadenaron posturas álgidas que derivaron en tensiones de diversa índole (las que hasta hoy ...
Freddy Galeano
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The corrosion resistance and microstructure of UBM system-deposited NbxSiyNz thin films
Ingeniería e Investigación, 2012 NbxSiyNz thin film nanostructure was grown using the unbalanced magnetron sputtering (UBM) technique with varying Si content. Corrosion resistance was evaluated by potentiodynamic polarisation technique in a 3% NaCl solution.
Leonardo Velasco Estrada +2 more
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Fibre-optic polarisers and polarising couplers
Electronics Letters, 1988 The dispersion equation describing the planar waveguiding properties of a thin metal film sandwiched between two dielectrics was used to predict the conditions for polarisation selective coupling from an optical fibre to surface plasmon polaritons. The conditions predicted by the analysis and those found by experiment were in close agreement and the ...
W. Johnstone +3 more
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Economic convergence and polarisation: towards a multi-dimensional approach
Hungarian Geographical Bulletin, 2015 The current increase of regional inequalities in Europe, and in particular in Central and Eastern Europe (CEE) has led to the reconsideration and revival of the concepts of "polarisation" and "convergence" in academic fields like regional economics ...
József Benedek, Aura Moldovan
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