Huayi Huang

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Number entry is an ubiquitous task in medical devices, but is implemented in many different ways, from decimal keypads to seemingly simple up/down buttons. Operator manuals often do not give clear and complete explanations , and all approaches have subtle variations, with details varying from device to device. This paper explores the design issues,(More)
We report on a case study investigating current practice in the use of a programmable infusion pump. We start by for-malising an existing description of the procedure followed by nurses for setting up a commercial infusion pump obtained via observation and interview. We then compare and contrast this procedure with a formal description of the sequence of(More)
Cholecalciferol (D(3)) supplementation results in variable increases in serum 25(OH)D(3) levels, however, the influence of genetic polymorphisms on these variable responses is unclear. We measured serum 25(OH)D(3), 24,25(OH)(2)D(3), 1,25(OH)2D(3) and VDBP levels in 50 colorectal cancer (CRC) patients before and during 2,000 IU daily oral D(3)(More)
A systematic tool-based method is outlined that raises questions about the circumstances surrounding an incident: why it happened and what went wrong. The approach offers a practical and systematic way to apply a distributed cognition perspective to incident investigations , focusing on how available information resources (or the lack of them) may shape(More)
INTRODUCTION Emergency care services are looking for new models of care delivery to deal with changing patient demographics and increased pressures. It has been suggested that advanced non-medical practitioners might be valuable for delivering such new models of care. However, it is not clear what the impact of the deployment of advanced non-medical(More)
It is well known that systems built with resilient components are not necessarily resilient systems. Nevertheless, when studying the resilience of work systems characterised by continuous inter-operations among humans and devices, analysts generally concentrate only on localised interactions among humans and devices. Consequently they fail to capture the(More)
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