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The ability of engineers and applied scientists to undertake experimental measurements is a fundamental requirement of the profession. However, it is not simply good enough to be able to perform experiments if we are not able to interpret the results. In this study, reports prepared by mechanical engineering students were examined to determine how students dealt with the disparity between experimental measurements and theoretical results in their Engineering Mechanics laboratories. Analysis of the reports, and discussions with students in their laboratory classes, revealed a superficial understanding or regard for experimental error. This superficial treatment of experimental error is, most likely, due to a number of factors that are discussed. Some possible strategies for addressing the issue are also examined.
Current conceptualisations of the digital divide have broadened beyond the notion of ‘haves’ and ‘have nots’ to include a more multifaceted perspective in which individuals and the contexts in which they learn are explicitly considered. This paper reports on a qualitative case study of a compulsory Engineering foundations course at a tertiary institution in New Zealand. The course provides a broad introduction to engineering concepts, with particular emphasis on problem solving, the design process, and use of 3-dimensional computer-aided design (CAD) software. Findings illustrate and illuminate the multidimensional nature of information and communication technology (ICT) inclusion/ exclusion and are described within three themes – technological, conceptual, and aspirational/ professional. Implications are presented for course designers...
Chlorination remains a predominant method for disinfecting drinking water. Electrogeneration of chlorine has the potential to become the favoured method of chlorine production if costs can be lowered and chlorine generation efficiencies can be improved. A novel perforated electrode flow through (PEFT) cell design has been developed to address these problems. The electrodes were made from low-cost graphite sheets and stainless steel mesh and separated by a non-conducting fabric membrane. This electrode configuration allows reduction of electrode separation to 0.1 mm or less, minimizing cell resistance and increasing electrical efficiency. The new PEFT configuration generates hypochlorite from a 0.5 mol L⁻¹ brine at a current efficiency of better than 60%. As an inline in situ device, it produces chlorine concentrations known to be suffi...
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