Aims. We aim to expand our understanding of radio wave emission and propagation in the pulsar magnetosphere by studying polarisation drifting sub-pulses highly sensitive observations PSR B1919+21 recorded at Arecibo Observatory. Methods. apply compare several methods analysis visualisation, including eigenvalue longitude-resolved covariances between Stokes parameters; scatter plots normalised v...

This paper is concerned with performance optimization of point-to-point communication of scalable video over lossy networks. The premise of the work is: (i) Decoder drift due to prediction should be controlled but not altogether disallowed; and (ii) Reaping the full benefits of drift management techniques requires accurate estimation of end-to-end distortion. A variant of the recursive optimal ...

The Schwinger oscillator operator representation of SU(3), studied in a previous paper from the representation theory point of view, is analysed to discuss the intimate relationships between standard oscillator coherent state systems and systems of SU(3) coherent states. Both SU(3) standard coherent states, based on choice of highest weight vector as fiducial vector, and certain other specific ...

The overall long-term goal for this project is to determine if and how acoustic coherent backscatter enhancement (ACBE) can be used for classification of active sonar returns in a wide variety of ocean environments. During its first two years, this project has focused on simulations of acoustic multiple scattering from aggregations of omni-directional point scatterers to determine the parametri...

The investigation reported in this paper aims at clarifying an important yet subtle distinction between (i) the logical objects on which measure theoretic probability can be defined, and (ii) the interpretation of the resulting values as rational degrees of belief. Our central result can be stated informally as follows. Whilst all subjective degrees of belief can be expressed in terms of a prob...

Scanning a charged tip above the two-dimensional electron gas inside a gallium arsenide/aluminum gallium arsenide nanostructure allows the coherent electron flow from the lowest quantized modes of a quantum point contact at liquid helium temperatures to be imaged. As the width of the quantum point contact is increased, its electrical conductance increases in quantized steps of 2 e(2)/h, where e...

We study the quantum evolution of a coherent state originally located in phase space on the unstable fixed point of a multiple well potential in one dimension. We show that for sufficiently long times the coherent state “splits” into two distinct components, each of which localizes semi-classically on a neighbouring unstable fixed point. We show moreover that during the transition the coherent ...

A bstract We study correlation functions of two AdS giant gravitons in 5 × S and a BPS supergravity mode using holography. In the gauge theory these are described by correlators Schur polynomials fully-symmetric representations single trace operator. find full agreement between semiclassical gravity computations at large N , for both diagonal off-diagonal structure constants. Our analysis $$ \m...