Communication-Efficient Parallel Gaussian Elimination

The model of bulk-synchronous parallel (BSP) computation is an emerging paradigm of general-purpose parallel computing. In this paper, we consider the parallel complexity of two matrix problems: Gaussian elimination with pairwise pivoting, and orthogonal matrix decomposition by Givens rotations. We define a common framework that unifies both problems, and present a new communication-efficient BSP algorithm for their solution. Apart from being a useful addition to the growing collection of efficient BSP algorithms, our result can be viewed as a refinement of the classical ''parallelism-communication tradeoff''

The role of metal cation in electron-induced dissociation of tryptophan

10.1140/epjd/e2010-00019-6European Physical Journal D60111-2

A Systematic Review of Stakeholder Involvement in Social Marketing Interventions

Stakeholder theory implies that involvement of stakeholders in intervention planning, implementation, and evaluation stages may enhance marketing outcomes. A systematic literature review was conducted to identify social marketing interventions published in peer reviewed journals whose reported aim was to reduce harm caused by alcohol from 2000 to May 2015. This paper considers the extent of stakeholder involvement in key stages of social marketing interventions, namely the formative research, implementation, and evaluation stages. The number of stakeholders was greatest in more complex community settings when compared to more narrow settings such as universities and schools. A restricted stakeholder focus was observed for evaluation. Stakeholder theory, a widely used management theory, can guide downstream social marketing intervention planning and design, implementation, and evaluation to deliver sustainable programmes. Limited stakeholder involvement in social marketing interventions limits their potential. Given limited stakeholder involvement was identified in the current review, the use of a broader array of stakeholders in formative research and evaluation is recommended to optimise behavioural outcomes.Griffith Business School, Department of MarketingNo Full Tex