It is demonstrated, both theoretically and experimentally, that the two basic parameters controlling the onset and extent of flocculation in sterically-stabilised dispersions are the particle con. centration and the depth of the pairwise interaction (free) energy minimum. It is also shown that the latter parameter is itself controlled, inter alia, by the thickness of the adsorbed polymer sheath...

The authors have proposed using category-theoretic sketches to enhance database design and integration methodologies. The algebraic context is called the Sketch Data Model (SkDM) and mathematically describes databases, views and their updates, and other database concepts. The system described here is a freely available graphical Java environment with a module that compiles a design incorporatin...

In this paper, we analyze the main topological properties of a relevant class of topologies associated with spaces ordered by preferences (asymmetric, negatively transitive binary relations). This class consists of certain continuous topologies which include the order topology. The concept of saturated identification is introduced in order to provide a natural proof of the fact that all these s...

Andreev billiards are finite, arbitrarily shaped, normal-state regions, surrounded by superconductor. At energies below the superconducting energy gap, single-quasiparticle excitations are confined to the normal region and its vicinity, the mechanism for confinement being Andreev reflection. Short-wave quantal properties of these excitations, such as the connection between the density of states...

EDINA as a JISC national data centre makes available, inter alia many geographical datasets and services for use by the UK academic community. To support discovery of these resources it operates metadata catalogues that one can search and browse to find specific items of interest. These metadata are typically made available both in HTML form for human consumption and in a machine readable form,...

Using the Fiedler-Polyak-Viro Gauß diagram formulas we study the Vassiliev invariants of degree 2 and 3 on almost positive knots. As a consequence we show that the number of almost positive knots of given genus or unknotting number grows polynomially in the crossing number, and also recover and extend, inter alia to their untwisted Whitehead doubles, previous results on the polynomials and sign...

We aimed to maximise the institutional impact of our attendance at Click 06 (the biennial ALIA conference) by providing a blog of the event and encouraging interaction with our colleagues during the conference itself. In this article we will describe the process of establishing, promoting and authoring an ‘institution focussed conference blog’. We also evaluate the success of the project and di...

The importance of developing in vitro tests for embryotoxicity is discussed, and ECVAM's work with its collaborators is summarised. Studies are in progress to find new endpoints for use in the scientifically validated embryonic stem (ES) cell test, so that the potential for chemical effects on endodermal, mesodermal and/or ectodermal differentiation can be identified. This involves, inter alia,...

money laundering is a silent crime which crosses international boundaries. modern technology has led to new avenues to disguise the proceeds of crime. the advent of electronic money has meant that tracing the transfer of possibly illicit funds is an extremely difficult if not impossible task. therefore there is a need to take consistent measures against money laundering throughout the world esp...

Biskra is one of the Algerian cities that has undergone a very accelerated evolution through different periods its history. It confronted with serious problems related to various dysfunctions in particular planned urban structure and social suffering from several ills, whether in: housing spaces, equipment or public spaces. The latter present many anomalies depending on consumption space, ident...