During the past few years the rapid development of computer tech­ nology has made high power computing facilities more readily accessible to a greater proportion of our industrial and academic community. This development coupled with the recent upsurge in mathematical modelling and computer simulation has led to signif­ icant developments in electromagnetic field theory and its applic­ ations to industry. In view of such developments and the present high interest to both academics and industry the theme chosen for the Polymodel 6 Conference held at Newcastle upon Tyne in May 1983 was Industrial Electromagnetics Modelling. To date the North East Polytechnics Mathematical Modelling and Computer Simulation Group has organised five successful Polymodel. conferences each with a different theme. The objectives of the Polymodel group include the promotion of collaborative research between Newcastle, Sunderland and Teesside Polytechnics and industry in the areas of mathematical modelling and computer simulation. The aim of the Polymodel 6 Conference was to call on and use the modelling and computer.simulation expertise of eminent academics and industrialists who are deeply involved in the area of electro­ magnetics. These proceedings have a twofold purpose in that they contain current analytical and numerical techniques relevant to electromagnetic field problems and useful ideas on the modelling and simulation techniques which are most appropriate. It was also felt important to include implications. of. computer developments (both hardware and software) on such work.

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Session A - Applications & Modelling Techniques I.- Keynote talk - Electromagnetic Modelling of Electrical Machinery for Design Applications.- A Detailed Lumped-Parameter Method for the Study of Electrical Machines in Transient Stability Studies.- The Electromagnetic Field of an Insulated Conductor in a Slot.- Session B - Applications & Modelling Techniques II.- Keynote talk - Electromagnetic Modelling Techniques using Finite Element Methods.- Error Bounded Formulations in Electromagnetism.- Session C - Applications & Modelling Techniques III.- Keynote talk - Electromagnetic Modelling Techniques using Boundary Element Methods.- Magnetostatic Field Calculations associated with Thick Solenoids with Iron Present.- Periodic Solutions for certain Non-Linear Parabolic Partial Differential Equations.- Session D - Simulation & Computing Techniques I.- Keynote talk - CAD Aspects of Electromagnetic Field Calculations.- Simulation of Hysteresis in Ferromagnetic Materials.- Prediction of Stability Models using Frequency Response Data.- Session E - Simulation & Computing Techniques II.- Keynote talk - The Extraction of Engineering Information from a Potential Solution to an Electromagnetic Field Problem.- Optimisation of the Magnetic Screening of Electromagnetic Coils.- Performance Calculations for Devices with Permanent Magnets.- The Use of Complex Permeability for Steady State Non-Linear Eddy-Current and Hysteresis Problems.- Session F - Impact of Computer Development.- Keynote talk - Hardware-Dependence of Electromagnetics Software.- Techniques of Post-Processing for Electromagnetic Field Solutions.- Computer Development at Sunderland Polytechnic - Has it Proved to be a Periodic Function?.- A Novel Approach to Computer Architecture.- List of Delegates.