We present the first results of the hard (5-10 keV) ASCA GIS survey SHEEP (Search for the High Energy Extragalactic Population). We have analysed 149 fields covering an area of 39 deg 2 detecting 69 sources. Several of these appear to be associated with QSOs and Seyfert-1 galaxies but with hard X-ray spectra, probably due to high absorption (N H > 10 22 cm −2) Indeed, the hardness ratio analysi...

Recall that group communication provides a model of communication whereby a process can send a single message to a group of other processes. When such a message is sent to a predefined group of recipients (as opposed to all nodes on the network), we refer to the communication as multicast. Since a multicast is sent out to a specific group, it is important to have agreement on the membership of ...

Gauge unification in a five dimensional supersymmetric SO(10) model compactified on an orbifold S/(Z2 × Z ′ 2) is studied. One orbifolding reduces N = 2 supersymmetry to N = 1, and the other breaks SO(10) to the Pati-Salam gauge group SU(4)C × SU(2)L × SU(2)R. Further breaking to the standard model gauge group is made through the Higgs mechanism on one of the branes. The differences of the thre...

In the title compound, C(14)H(11)NO(2)S, the sulfoxide O atom is disordered over two sites with occupancies of 0.886 (4) and 0.114 (4), reflecting a partial inversion of the lone pair at the tetra-hedral S-atom site. In the crystal, a supra-molecular arrangement arises from weak inter-molecular C-H⋯O hydrogen bonds. π-π contacts between the aromatic rings of symmetry-related mol-ecules [centroi...

SWI-Prolog is a Prolog implementation based on a subset of the WAM (Warren Abstract Machine). SWI-Prolog was developed as an open Prolog environment, providing a powerful and bi-directional interface to C in an era this was unknown to other Prolog implementations. This environment is required to deal with XPCE, an object-oriented GUI system developed at SWI. XPCE is used at SWI for the developm...