« al-Tha‘âlibî, Abû Mansûr ». EI 2, X, 2000, p. 456.

SCL P ei A Tutorial Introduction

ion before(task(Si,Di), task(Sj,Dj)) :Si+Di #<= Sj. Conjunction between(X,Y,Z) :X #< Y, Y #< Z. Disjunction (but see below) neighbour(X,Y) :( X #= Y+1 ; Y #= X+1 ). Iteration not_among(X, L) :( foreach(Y,L),param(X) do X #\= Y ). Recursion not_among(X, []). not_among(X, [Y|Ys]) :X #\= Y, not_among(X, Ys). 11.4 Same Problem Different Model There are often many ways of modelling a problem. Consid...

X - 2 Neale Et Al . : Monitoring Ocean Waves from P - Wave Microseisms

Extreme X - ray variability in the luminous quasar PDS 456

We present evidence from BeppoSAX and XMM-Newton of extreme X-ray variability in the high luminosity radio-quiet quasar PDS 456, the most luminous known AGN at z < 0.3. Repeated X-ray flaring is found in PDS 456, over the duration of the 340 ksec long BeppoSAX observation. The X-ray flux doubles in just 30 ksec, whilst the total energy output of the flaring events is as high as 10 51 erg. Under...

P in P Wheat -2000

A Massive X-ray Outflow from the Quasar Pds 456

We report on XMM-Newton spectroscopic observations of the luminous radio-quiet quasar PDS 456. The hard X-ray spectrum of PDS 456 shows a deep absorption trough (constituting 50% of the continuum) at energies above 7 keV in the quasar rest frame, which can be attributed to a series of blueshifted K-shell absorption edges due to highly ionized iron. The higher resolution soft X-ray Reflection Gr...