40 research outputs found
Topology of Chaotic Mixing Patterns
A stirring device consisting of a periodic motion of rods induces a mapping
of the fluid domain to itself, which can be regarded as a homeomorphism of a
punctured surface. Having the rods undergo a topologically-complex motion
guarantees at least a minimum amount of stretching of material lines, which is
important for chaotic mixing. We use topological considerations to describe the
nature of the injection of unmixed material into a central mixing region, which
takes place at injection cusps. A topological index formula allow us to predict
the possible types of unstable foliations that can arise for a fixed number of
rods.Comment: 15 pages, 13 figures, RevTeX4 macros. Final versio
Innovative GeschĂ€ftsmodelle im Smart Market â FlexibilitĂ€t von Energiemengen und neue Plattformen als Eckpfeiler
Multipoint Observations of Ionic Structures in the Plasmasphere by CLUSTER-CIS and Comparisons With IMAGE-EUV Observations and With Model Simulations
New approaches to communication management for transformation and change in organisations
The Public Relations Process - A Rethink
Much new work has been undertaken in the field of strategic management in recent years. Corporate planning, especially popular in the 1980s, has given way to new and dynamic management models. Similarly, various techniques for making organisations more effective such as âmanagement by objectivesâ (MBO) and âtotal quality managementâ (TQM) have been employed. Business process reâengineering (BPR) as proposed by Hammer and Champny was regarded as a radical leap forward in business organisation, but that is being challenged by the newer business transformation as propounded by Gouillart and Kelly and by the concept of the supply chain. Whatever management techniques are used, slimmer, flatter organisations are emerging as ârightâsizeâ and reâorganised organisations. The role of public relations in strategic management and organisation is crucial. Management theorists agree that good communication is vital to successful organisations. Despite the problems associated with it, BPR and its successors are expected to be major infuences on the way in which enterprises are organised. What is now required is a reâthinking of the structure and role of public relations within processâoriented organisations. This paper offers some initial thinking on how this could be done and the inherent difficulties. Some of the ideas are borrowed from BPR, but no judgement is made as to whether BPR is a ârightâ approach. The paper then goes on to look at the implications for the way in which public relations can effectively contribute to ânewâ organisations and the critical role of information technolog