Machine ➢ Formalise how the simulator works (program speci cation). ➢ Prove properties about the simulator. ➢ Give greater con dence in the simulation results. ➢ Improve on existing simulators. Andrew Phillips Microsoft Research 2004 23 Machine Data Structures ➢ Machine syntax νn1 νn2 ...νnN (Σ1 ::Σ2 :: ... ::ΣM :: []) : V,U ::= νn V Restriction p A List A,B ::= [] Empty p Σ::A Summation Andrew...

We consider meson-baryon interactions in S-wave with strangeness −1. This is a sector populated by plenty of resonances interacting in several two-body coupled channels. We consider a large set of experimental data, where the recent experiments are remarkably accurate. This requires a sound theoretical description to account for all the data and we employ Unitary Chiral Perturbation Theory up t...

UO2F2 abstracts F– anions from TlF in liquid ammonia solution and the compound [Tl2(NH3)6][{UO2F2(NH3)}2(μ-F)2] is formed. The has been characterized by single crystal X-ray diffraction, Raman spectroscopy quantum-chemical calculations for solid state. Quantum-chemical investigation of [{UO2F2(NH3)}2(μ-F)2]2– anion showed that U–(µ-F)–U σ-3c-4e-bond essentially ionic. [Tl2(NH3)6]2+ cation shows...

If G = (V, E, σ) is a finite signed graph, a function f : V → {−1, 0, 1} is a minusdominating function (MDF) of G if f(u) +summation over all vertices v∈N(u) of σ(uv)f(v) ≥ 1 for all u ∈ V . In this paper we characterize signed paths and cycles admitting an MDF.

We have developed a formalism for microscopic Brueckner-type calculations of dense nuclear matter that includes all types of baryon–baryon interactions and allows to treat any asymmetry on the fractions of the different species (n, p,Λ,Σ−,Σ0,Σ+,Ξ− and Ξ0). We present results for the different single–particle potentials focussing on situations that can be relevant in future microscopic studies o...

The bacterial RNA polymerase holoenzyme consists of a catalytic core enzyme in complex with a σ factor that is required for promoter-specific transcription initiation. Primary, or housekeeping, σ factors are responsible for most of the gene expression that occurs during the exponential phase of growth. Primary σ factors share four regions of conserved sequence, regions 1–4, which have been furt...

The bacterial RNA polymerase holoenzyme consists of a catalytic core enzyme in complex with a σ factor that is required for promoter-specific transcription initiation. Primary, or housekeeping, σ factors are responsible for most of the gene expression that occurs during the exponential phase of growth. Primary σ factors share four regions of conserved sequence, regions 1-4, which have been furt...

D PR O Abstract The factors which control grain boundary segregation in oxide ceramics are reviewed. These include grain boundary energy, cation–cation interactions, impurity cation size, as well as electrostatic interactions with the grain boundary space charge. In addition, an approach for measuring grain boundary segregation in those materials, as a function of the five macroscopic parameter...