Calendar: 1971-1972 Page 434

Annual Report of the Delegacy lix items of obsolete heavy equipment were replaced by compact units of modern design The staff-student committee was active throughout the session For the first time the department has this year put forward nomination for the award of the prize offered by the Institution of Electrical Engineers Dr Ε Deeley's work on television aperture-correction sup- ported by the Science Research Council developed using digital techniques at speed of operation approaching the limit of existing technology The novel method of measuring accurately the speed of moving steel strip was further developed prototype of the system was set up at the Trostre Works of the British Steel Corporation at Llanelli and encouraging test results were obtained Dr Lindsay's work on electron velocity distribution in the presence of magnetic fields continued Following his visit last year to the Massachusetts Institute of Technology he opened new field of investigation-the use of electron cyclotron resonance as possible growth mechanism at microwave frequencies report on the pre- liminary results of this study has been chosen as the opening paper for session of the eighth international conference on microwave and optical generation and amplification to be held in Amsterdam In an investigation supported by the Ministry of Technology and under the direction of Dr Burtt measurements were made of electron ejection and positive ion reflection of sodium silver copper and gold positive ions with incident energies below 300 eV This has been done for contaminated and also for freshly condensed aluminium silver and gold polycrystalline surfaces In the field of electrical machines Dr Ε Freeman's research on induction motor theory was extended to take into account transverse edge effects and cylindrical geometries On the experimental side his investigations continued into the measurement of tractive and levita- tion forces in linear induction motors In addition Dr Mastero wrote large general computer program to calculate under non-linear conditions the magnetic field distribution in the pole-pitch of homo- polar or heteropolar electrical machine Graphs can be computer produced describing the distribution of the radial induction in the air-gap region and its harmonic analysis Members of staff have continued to contribute to the work of the professional institutions and to other scientific bodies Mr Platt who has for many years been active in relation to the