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Engineering Science and Education Journal

Issue 5 • Date Oct 2000

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Displaying Results 1 - 7 of 7
  • The electronics industry challenge to higher education

    Page(s): 231 - 235
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (428 KB)  

    Change in the electronics industry continues at a pace, fuelled by the constant developments in technology and the requirement to evolve a cost-competitive business position. This paper summarises the position of the electronics industry in Scotland and provides an assessment of the challenge to higher education (HE) generated by that industry. The author provides a view of industry partnership with HE facilitating the sharing of new methods and technology competencies View full abstract»

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  • New developments and future trends in high-efficiency lighting

    Page(s): 207 - 217
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1524 KB)  

    There have been several developments in lamp technology and remote lighting systems that promise savings in electrical power consumption and improved quality of the lighting space. This article reviews the developments in fluorescent lamps, metal halide lamps, electrodeless lamps, sulphur lamps, LED lamps, electronic ballasts, and lighting fixtures. Remote lighting systems using hollow light-guides, solid light-guides and reflector based systems are described View full abstract»

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  • Lamps and lighting

    Page(s): 196 - 202
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (548 KB)  

    There is now a wide demand for the provision of high-quality visual environments and consequently lighting engineers need to examine closely the numerous interacting aspects of human activities. This paper reviews the characteristics of the human visual system and how these affect visual performance under different lighting conditions. The way in which the techniques that are used to convert electrical energy to visible radiation influence the quality of the radiation for lighting purposes is discussed and the paper concludes by linking the properties of several families of lamps to the main lighting appliances View full abstract»

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  • Something old, something new and something just in time: dilemmas for EE education and training

    Page(s): 219 - 230
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1032 KB)  

    Electronic engineering has been changing at a furious pace, as has the education system that struggles to supply the trained persons needed. This paper examines some of the changes and discusses their implications, highlights some exciting developments and points to some areas where major change seems generally overdue View full abstract»

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  • Intelligent sensors using neural networks: the example of a microsystem for visual inspection

    Page(s): 236 - 240
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (768 KB)  

    The aim of this article is to show how artificial neural networks and 3D packaging technology have a major role to play in the development of microsystems. A visual inspection system for real-time identification of objects in a scene is described. The system comprises a CMOS or CCD imager, an analogue preprocessing stage that includes a learning mechanism for adapting the system to images of different contrast, and a neural classification stage. The detection of a matrix code using as the classifier a vector support machine is illustrated. As the latter is difficult to realise in VLSI the author has turned to the threshold neural network `Offset', which constructs a parity machine, i.e. a network comprising a single layer of neurons, the output being obtained with the help of a simple exclusive-OR logic gate. Unfortunately the parity machine suffers from overtraining, as the OffSet algorithm converges to a zero error over the entire training base. Nevertheless, if good implementation strategies are available, it is possible to improve the performance in general by combining a large number of classifiers by majority voting. A CMOS VLSI circuit, called SysNeuro, has been fabricated which integrates a parity machine in a square systolic architecture of 4×4 processors. This circuit has variable precision. The number of neurons has been increased by combining 4 SysNeuro chips in a multichip module and stacking three of the modules to form a 3D structure-SysNeuro3D View full abstract»

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  • Electronic power supplies for high-density discharge (HID) lamps

    Page(s): 203 - 206
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (352 KB)  

    The principal methods of electronically controlling the power to high-intensity discharge lamps is summarised. These include phase shift control, resonant inverters and variable pulse width control, using half- or full-bridge configurations depending on the power capability of the switching elements. Control of power is possible by varying the pulse width, varying the frequency or both. Varying the frequency is less demanding on the switching characteristics of the devices. Both IGBTs and MOSFETs can be used, however the power loss using IGBTs is generally lower for a given power at lower frequencies. Powers above 10 kW are readily achievable by these means View full abstract»

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Aims & Scope

The Engineering Science and Education Journal was published by the IET between 1992 and 2002.

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