Search results

Describes Childreach – a US child‐focuses development organization which sponsors children and their families in developing countries – and a recent project in development education, “Buffalo banks and borewells: Childreach makes sense of development”, which involved creating and distributing educational newsletters on Third World and development issues. Lists the goals of the project and how they were addressed. Outlines what was gained from the exercise. Links this to the paradoxical situation in the USA whereby the public think money should go towards foreign aid but are reluctant to actually fork out any money themselves. Considers the role of trust and the concept of social capital, emphasizing that sponsors need to trust that their investment is making an important contribution to improving the life of the sponsored child and its family or community.

THE use of liquid oxygen as an oxidizer for various fuels in liquid rocket propellent systems is not new. Professor Goddard used liquid oxygen in his rocket experiments and the well known German V‐2 rockets used this material as an oxidizer. However, its effect on non‐metallic materials ordinarily used in rocket systems was not investigated until recent years. This investigation was prompted by phenomena which had been experienced by rocket engine and rocket aircraft manufacturers and by suppliers of the material. It was observed that when some organic materials came in intimate contact with liquid oxygen they became prone to detonation when subjected to certain impact energies. This was undoubtedly due to the formation of unstable organo‐peroxide compounds which when impacted released high levels of energy resulting in an explosion. Specifically, when liquid oxygen was accidently spilled on asphalt and inadvertently stepped on, the asphalt would often explode. Also, leather gaskets immersed in liquid oxygen and subjected to surge impact detonated with disastrous effects.

Outlines the need for the development of a top‐face sensor system to ensure consistent penetration during mechanized arc and laser welding. Lists the characteristics such a system should incorporate and describes current sensor systems which might be adapted. These include ultrasonic techniques, acoustic emission techniques, weld pool sag sensing techniques, weld pool oscillation sensing, weld pool viewing techniques, and thermal sensing techniques. Gives the range of application and accuracy of control of the reported systems and concludes that there is currently no one system, commercially available, which satisfies all the requirements of the ideal system.

How should Office Automation (OA) be introduced? Organisation and Methods (O&M) often get the task but are not well equipped to do so. Case studies show that OA projects often create problems and that O&M receive the blame. O&M staff need to adopt a proactive role. The growth in information technology demands a new kind of manager — one who combines technological skills with an understanding of business.

Often, real estate factors are given much of the credit for a particular site’s success or failure when it comes to sales. The current paper asserts that some of the praise or blame heaped onto real estate decision‐makers may be undue. Sometimes success or failure is due to non‐real estate factors such as a marketing or advertising strategy, operations, or brand awareness. The paper discusses non‐real estate variables that contribute to a site’s overall success or failure, and offers diagnostics and suggestions to help address non‐real estate problems that could influence sales.

In the paper the optimization procedure of a direct current motor with a hybrid excitation has been presented. The excitation system consists of a shunt field winding disposed around field pole and permanent magnet, both acting in parallel. The field distribution in motor for various magnet and field pole dimensions has been determined using finite element method. The flux linkage with the armature winding has been computed. Demagnetizing effect of armature current was taken into account. The optimal permanent magnet and the field pole dimensions, ensuring minimum total cost of purchase and work during assumed period of time were calculated. Motor characteristics e.g. rated torque, rated current, speed regulation limit were used as constraints. In worked up algorithm and computer program Carroll internal penalty function method was used. Some basic suggestions tor design of optimal hybrid excited dc motors with parallel permanent magnet and electromagnetic excitation are given.

I‐V characteristics of GaAs n‐i‐n structures are calculated by considering impact ionization of carriers. Impact ionization at reverse‐biased n‐i junction becomes a cause of steep current rise when an acceptor density in the i‐layer is high. It is shown that an optimum acceptor density exists to keep a good isolation. Photoconduction transients of GaAs n‐i‐n structures are also simulated, and are shown to be strongly affected by existence of n‐i junctions.

In the course of development of human communities towards industrially advanced societies of today, there have been changes not only in economic conditions in the majority of fields of human activity but also in the ways of providing for food, which went hand in hand with changes in living conditions. Large‐scale industrial production has brought about major changes in the way of life of the population. The development of industrial agglomerations results in a growing number of city dwellers, most of whom have no chance of producing foodstuffs of their own in kind. The distance between residential and industrial areas has been growing, the number of employed women has risen considerably. These are but a few factors affecting the way of boarding, particularly in households.

‘The application of computers to teaching and learning is a logical development in the evolution of educational technology, although at present the ultimate benefits can be but dimly foreseen. The realization of this potential will require concentrated research and development efforts which can only profitably flourish within the ambit of a national programme of work.’ So opens a recently published report of the National Council for Educational Technology addressed both to Ministers and to all engaged in the education industry. What lies behind this bald statement with its overtones of brash prophecy, veiled threat, and blatant jingoism? I would like to explore some of the reasons for thinking that a revolution in education, as far reaching as the Copernican revolution in astronomy, is now within the realm of possibility.

This paper aims to encourage PR practitioners to appreciate their role as the pivot of their organisation’s reputation management. It discusses the importance of codes of ethics, claiming that these should be reviewed by public relations associations every 4‐5 years. Good conduct is essential for every PR practitioner as a reputation manager, and PR associations must ensure that codes of ethics are enforced. PR associations should address the challenge posed by the boom in the labour markets for PR practitioners by ensuring that all practitioners are well trained.