DOI:10.1049/esej:19930074

出版商:IEE    

年代:1993

数据来源: IET

摘要:

The human body can be regarded as an extraordinarily complex electrical machine. It will respond to externally applied electromagnetic stimuli and aspects of its functionality can be interrogated electromagnetically to aid in diagnosis. The paper describes examples of interactions between electromagnetism and the body. The hazards of electric shock are considered along with the use of the defibrillator for restarting the heart. Electromagnetic therapies are discussed in the light of the disappointing lack of objective evidence to support claims for their effectiveness. Finally, two examples of new diagnostic techniques using electromagnetic energy are described. Electrical impedance tomography produces cross-sectional images of the distribution of electrical impedance in the body and magnetic nerve stimulation uses currents induced by large magnetic field pulses to stimulate nerves and the human brain without causing pain.

DOI:10.1049/esej:19930075

出版商:IEE    

年代:1993

数据来源: IET

摘要:

This paper is concerned principally with a view of engineering, engineering education and sustainable activity in the United Kingdom. It presents a synoptic review of current environmental issues and the response of the engineering profession in its widest sense. It highlights the tentative impetus for ‘greening’ undergraduate curricula and the response by industry to environmental issues. The importance of engineers adopting a high profile in public affairs to convey concern and commitment to sustainable development is stressed. It calls for opportunities in engineering education for the synthesis of rational and intuitive thinking in solving problems.

DOI:10.1049/esej:19930076

出版商:IEE    

年代:1993

数据来源: IET

摘要:

Robotic technology promises considerable help to people with severe physical disability. The realisation of practical solutions to keep the promise has been slow. A number of systems, including wheelchair-mounted manipulators and vocational workstations, are now under active development and close to market. One area in which a robotic solution is achieving some success is the Handy 1 automated eating aid, which was awarded the IEE Disability Prize in 1992. This article is based on a colloquium organised to accompany the award of the prize.

DOI:10.1049/esej:19930077

出版商:IEE    

年代:1993

数据来源: IET

摘要:

The difficulties of teaching electromagnetic field theory to electrical engineers are well recognised, and are increased by modern course requirements. It is suggested that the ‘Maxwell’ equations are unnecessary, together with the concepts of flux on which they are founded, and that a fresh look is needed at what is meant by magnetic and electric ‘fields’. Maxwell himself pointed the way.

DOI:10.1049/esej:19930078

出版商:IEE    

年代:1993

数据来源: IET

摘要:

The Greenwich Time Signal, or the ‘pips’ as it is often known, was first broadcast by the BBC on 5th February 1924. The methods used to generate this signal have been rich and varied. This article traces their development from the technology first used at the Royal Greenwich Observatory through to the present arrangements at BBC Broadcasting House in London.

DOI:10.1049/esej:19930079

出版商:IEE    

年代:1993

数据来源: IET