In the trade-o s between security and performance, it seems that security is always the loser. If we allow for adaptive security, we can at least ensure that security and performance are treated somewhat equally. Using adaptive security, we can allow a system to exist in a less secure, more performant state until it comes under attack. We the adapt the system to a more secure, less performant i...

We propose an abstract operational model of a highly adaptive distributed resource management architecture (DRMA) for network enabled operations in large-area surveillance. The architectural design of DRMA is described in terms of a distributed abstract state machine. As part of this work, we present the specification and design of a Dynamic Configuration Manager (DCM) that actively maintains t...

The Resource Lifecycle Manager pattern decouples the management of the lifecycle of resources from their use by introducing a separate Resource Lifecycle Manager, whose sole responsibility is to manage and maintain the resources of an application. Note: This pattern appeared in a heavily reworked and updated version in the book Pattern-Oriented Software Architecture — Patterns for Resource Mana...

Query processing in global information systems integrating multiple heterogeneous sources is a challenging issue in relation to the effective extraction of information available on-line. In this report we delineate the functional specifications of a query manager in the context of a data integration, wrapper/mediator based system, the MOMIS system. The developed techniques rely on the availabil...

ion: services and quality of service. In the simplest case, a Dependency Description simply lists the other resources a resource depends on. This means that the dependencies refer to specific software or hardware components. For greater flexibility, it is possible to specify the abstract service types a resource provides. For example, the Dependency Description of an application that displays i...

The Manager-Workers pattern is an architectural pattern for parallel programming, used when a design problem can be understood in terms of activity parallelism. This pattern proposes a solution in which the same operations are performed simultaneously and independently on different pieces of data. Operations carried out by each component are independent of operations by other components.

The different cultures of doctors and managers and the impact of these on their working relationships are described. A historical resumé tracks organisational change, the evolving nature of the relationship and the stresses it engenders. The phenomenon of scapegoating and an approach to managing risk is explored. Vignettes describing familiar problems, with suggested strategies for analysing th...

We show that fund families allocate their fund managers to different market segments such that their skill is rewarded best. Whether a fund manager’s skill is rewarded by higher alpha depends on the efficiency of the market segment in which she works. Even skilled managers can generate alpha only if the market segment is inefficient. Fund families take this relation between skill and inefficien...

"SMELL THE ROSES" (upper-case letters are the program's). The program thought I didn't smell the roses because I was leading too hectic a life. Although busy, I do nonetheless take time for such things, but I answered "No" to that question because of rather severe allergies! Nevertheless, as a patient who had just spent a considerable amount of time entering the data, I was pleased the program ...