4 resultados para Heart Parameters
em Greenwich Academic Literature Archive - UK
Resumo:
Cu column bumping is a novel flip chip packaging technique that allows Cu columns to be bonded directly with the dies. It has eliminated the under-bump-metallurgy (UBM) fonnation step of the traditional flip chip manufacturing process. This bumping technique has the potential benefits of simplifying the flip chip manufacturing process, increasing productivity and the UO counts. In this paper, a study of reliability of Cu column bumped flip chips will be presented. Computer modelling methods have been used to predict the shape of solder joints and the response of flip chips to cyclic thermal-mechanical loading. The accumulated plastic strain energy at the corner solder joints has been used as an indicator of the solder joint reliability. Models with a wide range of design parameters have been compared for their reliability. The design parameters that have been investigated are the copper column height and radius, PCB pad radius, solder volume and Cu column wetting height. The relative importance ranking of these parameters has been obtained. The Lead-free solder material 96.5Sn3.5Ag has been used in this modelling work.
Resumo:
The incidence of coronary heart disease (CHD) has been significantly reduced by the introduction of the National Service Framework in 2000 but has not yet reached set targets. This article analyses the adverse effects of specific CHD risk factors to the cardiovascular system and proposes local and national strategies for further reduction in the incidence, morbidity and mortality of CHD. It provides an example of how nurses can use a health promotion programme to support patients in giving up smoking, a major contributing factor in CHD. The programme uses cognitive behaviour therapy to improve patients' uptake and adherence.
Resumo:
The Art Workers Guild, brother body to the SPAB and once presided over by William Morris and his followers, is 125 years old this year. Alan Powers looks back over its history, and sheds light on the characters and common bonds between the two bodies – while present Brothers of the Guild are pictured at work by photographer Lara Platman for new book to mark the event.
Resumo:
Since their incorporation in 1993, further education (FE) colleges in England have been responsible for their own staffing and, faced with funding constraints as well as recruitment and retention targets, some have introduced a new category of staff referred to here as 'learning support workers' (LSWs). Though their employment conditions and specific duties vary considerably, LSWs' work often includes providing individual care for students. In this small-scale study, using semi-structured interviews, the perceptions of some teachers and LSWs about the nature of their relationships with each other and with students are investigated. The study is set broadly in the context of debates about the impact of public sector reform on FE colleges and teachers. A discourse analysis approach is adopted in discussion of the data. The authors conclude that although they are differently positioned in relation to traditional discourses of professionalism, both teachers and LSWs are perceived to be carrying out what Hochschild termed 'emotional labour'. The contradictory nature of emotional labour is also highlighted. Some of the implications of employing a new group of workers in FE are discussed.