Using a fully three-dimensional, Lagrangian two-fluid magnetohydrodynamics code, we simulate the collapse and fragmentation of a rotating molecular cloud core. The code used is able to describe the dynamics of partially ionized fluids and takes account of ambipolar diffusion and magnetic braking.We model both magnetized and non-magnetized cores. The magnetized cores are chosen to be initially thermally supercritical, but magnetically subcritical. Therefore, before they can collapse, magnetic support must be lost through ambipolar diffusion.Our results imply that magnetic braking is so effective in removing angular momentum that fragmentation is inhibited. These results cast doubt on the suggestion by Boss that the likelihood of core fragmentation is increased by a magnetic field.

Differentiation tools enable team members to compare two or more text files, e.g. code or documentation, after change. Although a number of general-purpose differentiation tools exist for comparing text documents very few tools exist for comparing diagrams. We describe a new approach for realising visual differentiation in CASE tools via a set of plug-in components. We have added diagram version control, visual differentiation and merging support as component-based plug-ins to the Pounamu meta-CASE tool. The approach is generic across a wide variety of diagram types and has also been deployed with an Eclipse diagramming plug-in. We describe our approach's architecture, key design and implementation issues, illustrate feasibility of our approach via implementation of it as plug-in components and evaluate its effectiveness.

We describe the Design Pattern Modelling Language, a notation supporting the specification of design pattern solutions and their instantiation into UML design models.

Developers need tool support to help manage the wide range of inconsistencies that occur during software development. Such tools need to provide developers with ways to define, detect, record, present, interact with, monitor and resolve complex inconsistencies between different views of software artifacts, different developers and different phases of software development. This paper describes our experience with building complex multiple-view software development tools that support diverse inconsistency management facilities. We describe software architectures we have developed, user interface techniques used in our multiple-view development tools, and discuss the effectiveness of our approaches compared to other architectural and HCI techniques.

In radical retropubic prostatectomy, a piece of Denonvilliers' fascia is taken with the specimen, thus removing these nerves. The loss of these nerve fibres may explain the significant rate of erectile dysfunction after 'nerve-sparing' surgery.