The six papers in this issue are based on work presented at the 15th British Colloquium for Theoretical Computer Science (BCTCS) held at the University of Keele in April 1999 and organised by John Stell. Although BCTCS has been running for a number of years, the Keele colloquium is the rst for which participants have been able to submit papers for publication giving more detailed treatments of ...

Two continuous mixture phase equilibrium algorithms which can be used for vapor-liquid equilibrium calculation involving verymany-component fluid mixtures are proposed. The algorithms are applied to the case of simulated gas-condensate systems with analytical results. The proposed continuous mixture techniques reduce the required computer time significantly While they retain accuracy of the pre...

In the dark-adapted photoreceptor of the horseshoe crab, Limulus, transient discrete depolarizations of the cell membrane, discrete waves, occur in total darkness and their rate of occurrence is increased by illumination. The individual latencies of the discrete waves evoked by a light stimulus often cannot be resolved because the discrete waves overlap in time. The latency of the first discret...

1 Einleitung Produktlinien gelten als der systematischste Ansatz um die Softwareentwicklung durch strategische Wiederverwendung deutlich effizienter zu gestalten. Allerdings zeigt die Erfahrung, dass die Entwicklung von Softwaresystemen auf Basis einer bestehenden Wiederverwendungsinfrastruktur häufig weniger effizient ist, als geplant und generell propagiert [1]. Einer der Gründe hierfür liegt...

In teleost fish, dopaminergic interplexiform cells provide an intraretinal centrifugal pathway from the inner to the outer plexiform layer, where they make abundant synapses on cone-related horizontal cells. The interplexiform cells receive all their input in the inner plexiform layer from centrifugal fibers and amacrine cells. In fish, centrifugal fibers contain gonadotropin hormone-releasing ...

We have studied the anatomical localization, chromatographic properties, and development of somatostatinlike immunoreactivity (SLI) in the guinea pig retina. The majority of guinea pig retinal SLI in the adult and fetus eluted similarly to somatostatin-28 by gel filtration and high pressure liquid chromatography. This represents a higher ratio of somatostatin-%-like material to total SLI than h...

We present a comprehensive study of the lattice restricted primitive model, i.e., a lattice gas consisting of an equal number of positively and negatively charged particles interacting via on-site exclusion and a 1/r potential. On the cubic lattice, Monte Carlo simulations show a line of Néel points separating a disordered, high-temperature phase from a phase with global antiferromagnetic order...

Alkane and polymer fluids near surfaces and in confined geometries arepresently of intense interest but poorly understood.‘” Direct experimental probing of confined liquid structure is difficult and indirect due to the small amount of material present. Computer simulations on coarse-grained’ and atomistic’ model chain molecule fluids have provided considerable insight, but are expensive and lim...

Das Energieversorgungssystem steht vor einem Paradigmenwechsel. Die in der Vergangenheit vorherrschenden zentralen Erzeugungsstrukturen migrieren zu verteilten netzwerkartigen Erzeugungs-, Speicher-, und Verbrauchsstrukturen. Dies erfordert eine Vernetzung der Netzteilnehmer zu einem intelligenten Energieversorgungssystem (Smart Grid) als elementarer Bestandteil eines intelligenten Energiesyste...