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Developers of parallel applications can be faced with the problem of combining the two dominant models for parallel processing—distributed-memory and shared-memory parallelism—within one source code. In this article we discuss why it is useful to combine these two programming methodologies, both of which are supported on most high-performance computers, and… (More)
This paper discusses methods for expressing and tuning the performance of parallel programs, by using two programming models in the same program: distributed and shared memory. Case studies show how mixing these two approaches results in efficient machine use because the two models match the two levels of parallelism present in the architecture of current… (More)
The HiPerDNO project aims to develop new applications to enhance the operational capabilities of Distribution Network Operators (DNO). Their delivery requires an advanced computational strategy. This paper describes a High Performance Computing (HPC) platform developed for these applications whilst also being flexible enough to accommodate new ones emerging… (More)
This paper introduces the work being carried at NAG Ltd towards the development of a Fortran 77 Library aimed at parallel, distributed memory machines, including networks and clusters of workstations.
The author discusses the issues of rising life expectancy and population aging by examining the definitions and realities of these two terms. She argues that the concepts "old age" and "population aging" are historical cultural constructs, and that it is time to redefine the later stages of life and the role of older people. The concept of a "third age" of… (More)