A typical computing environment for solving Grand Challenge Problems consists of a high performance graphics workstation acting as a front-end, connected to a variety of remote supercomputers. A Problem Solving Environment (PSE) is a system of programs designed to assist a scientist in solving his/her problems without detailed understanding of parallel machines, and guiding him/her through the ...

Single crystals of the title compound, tetra-magnesium dianti-monate(V), were obtained by the slow cooling method with K(2)CO(3). The structure is isotypic with ilmenite, which is constructed by the alternate stacking of layers consisting of metal-oxygen coordination octa-hedra. In each layer, the octa-hedra are connected by sharing edges so as to make holes. One of the two non-equivalent metal...

The construction by Hall of a fundamental orthodox semigroup WB from a band B provides an important tool in the study of orthodox semigroups. We present here a semigroup SB that plays the role of WB for a class of semigroups having a band of idempotents B. Specifically, the semigroups we consider are weakly B-abundant and satisfy the congruence condition (C). Any orthodox semigroup S with E(S) ...

In Cs(2)SbCl(6) and related compounds antimony appears as Sb(III) and Sb(V) in alternate halide octahedra. The optical spectrum contains "mixed valence" peaks assigned to Sb(III) --> Sb(V) transfer near 18 and 27 kK (cm(-1)). In addition there is a peak near 31 kK assigned to an internal transition on Sb(III) and one near 37 kK assigned to Sb(V), mixed with the absorption edge of the crystal. T...

Antimony phosphate glasses (Sb2O3)x(P2O5)1-x with x = 0.05 and 0.80 were measured by neutron X-ray diffraction high real-space resolution. The P−O O−O distance peaks of the PO4 tetrahedra found expected parameters. For glass Sb−O coordination numbers distances suggest highly distorted SbO3 SbO4 environments according to strong lone-pair effects Sb3+. fraction has right portion that all oxygens ...

The mechanisms through which p38 mitogen-activated protein kinase (p38 MAPK) is involved in smooth muscle contraction remain largely unresolved. We examined the role of p38 MAPK in prostaglandin F(2alpha) (PGF(2alpha))-induced vasoconstriction and in hypoxic pulmonary vasoconstriction (HPV) of rat small intrapulmonary arteries (IPA). The p38 MAPK inhibitors SB-203580 and SB-202190 strongly inhi...