Did global income inequality rise or fall over the past twenty years? Exchange rate comparisons suggest that inequality has risen, but the purchasing power comparisons of the Penn World Tables suggest inequality has fallen. We show that both measures are biased. Exchange rate comparisons ignore the relative price of non-tradables, whilst the Penn World Table method of calculating purchasing pow...

This paper is concerned with a synthesis study of the fast Fourier transform (FFT), the short-time Fourier transform (STFT), the Wigner distribution (WD) and the wavelet transform (WT) in analysing the phonocardiogram signal (PCG). It is shown that these transforms provide enough features of the PCG signals that will help clinics to obtain qualitative and quantitative measurements of the time-f...

The problem of query by fax (QBF) and by other low quality images for art image retrieval is introduced. A reliable solution to the problem, the slow QBF algorithm, is presented but it is too slow for fast interactive retrieval situations. It is used as a yardstick for assessing the quality of a much faster technique, the fast QBF algorithm, based on the pyramid-structured wavelet transform (PW...

Polarized electron beams are now in routine use in particle accelerators for nuclear and high energy physics experiments. These beams are presently produced by dc-biased photoelectron sources combined with rf chopping and bunching systems with inherently high transverse emittances. Low emittances can be produced with an rf gun, but the vacuum environment has until now been considered too harsh ...

A proof of principle experiment is underway at the UCLA Neptune laboratory to test the concept of generating linearly ramped relativistic electron bunches (rising in density from head to tail followed by a sharp cutoff) by using a sextupole-corrected dogleg section as a bunch compressor. Bunches with this structure have been predicted to be ideal for use as a plasma wakefield drive beam. The di...

Dual color emissivity free methodology by thermography allows to obtain 2D (two-dimensional) temperature maps using local grey body hypotheses and narrowband filters. By a suitable pair of filters is possible the ratio between two thermal camera input signals that depend only on not emissive properties investigated surface. The aim this concise review paper summarize discuss developments applic...