Search results

Hotelry and Tourism can be considered as synonymous especially when looked at in small‐state, developing‐country terms, in that, in these small economies, without tourism, there can be no hotels and without hotels, nos tourism. Of course this is evident in both developing and developed countries that are dependent on tourism for their economic wellbeing, but it is certainly more marked in the former, especially the island state, where, as it were, hotels were and are still constructed dependent on the fact that tourism already exists in the country and the country has the potential for tourism growth. In other words the rationale for hotel development is based on the state of the tourism product in the developing territory, and this is usually dependent on outside marketing forces from the developed nations, as there is little or no domestic tourism in these small countries to merit the growth of the hotel plant. Therefore, the growth and potential of the industry is dictated usually by countries to the north and their influence on the culture and the habits of the developing host nation (usually to their south) is oftentimes enormous.

Sequel of no. 4/83, p. 24 Not many national associations hold conventions in countries other than their own. In Northwest Europe it is unlikely that any country is a net recipient of national conventions from elsewhere in Europe. In fact, there is likely to be some small ‘leakage’ of national association conventions to destinations in the Mediterranean or further afield. However, Northwest Europe (particularly the U.K. and Ireland) receives a small number of North American association conventions. Based on the available data this may amount to some 25 large conventions yearly.

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.

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 rapid growth and development of the aircraft industry has necessitated prompt decision and action in handling the many problems in connexion with the erection and equipment of aerodrome buildings, hangars, workshops and factories. In the urgency of providing the industry with all its varied requirements, it is not surprising that lire insurance planning has to a very large extent been crowded out. There are, no doubt, several reasons for this and in the welter of plans and designs that have been drawn and re‐drawn, the necessity of complying with the clients' requirements, numerous rules and regulations of local authorities and Acts of Parliament, etc., the benefits which accrue to wise planning from a fire insurance point of view have not always been fully appreciated. The need for increased output has in many cases pressed very heavily on those making the necessary preparations, and frequently no serious thought has been given to fire insurance planning. There are some persons who are under the impression that, having conformed with the numerous rules and requirements, they have carried out all that can be done in this direction.

‘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.

The paper deals with the method of the stray losses calculation in single‐sided linear induction motors. The stray losses produced by the higher space harmonics of the primary winding MMF and by the primary slots have been discussed.

The commercial practice of tourism avails itself of a whole range of classical methods of research into market, its dispersion and trends, starting with statistics and ending up with public opinion polls. The pattern and volume of tourism demand as well as its principal trends may be compared on the basis of international statistics that are more or less uniform. However, not even more detailed statistical observations are adequate for the formulation of long‐term marketing strategy of the given country.