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The automatic flight control system of the Standard and Super VC10 was designed to be capable of development to full blind landing. To meet this requirement the system had to be capable of failure survival and this includes associated services such as power supplies and flying controls. The method of autopilot failure survival chosen was to provide two monitored systems which are fail soft, i.e. there is negligible aircraft disturbance after a failure. Then auto changeover between the systems provides failure survival when it is necessary. The arguments for this type of system are expanded in the article on p. 49 by A. R. Colwell.

The purpose of this chapter is to offer reflections on conventional theories concerning causes and determinants of diseases. It also intends to examine both theoretical and empirical bases for adopting an Integrated Social-Ecological Systems (ISES) lens as a tool for understanding complexities related to drivers, determinants and causes of diseases.

We assessed the theoretical underpinnings of a range of historical and contemporary lenses for viewing infectious disease drivers and the implications of their use when used to explain both personal (i.e. individual) and population health. We examined these issues within the empirical context of the City of Dhaka (Bangladesh) by adopting an ISES lens. Within this study an emphasis has been placed on illustrating how feedback loops and non-linearity functions in systems have a direct bearing upon various aspects of infectious disease occurrences.

A brief triumph over microbes during the last century stemmed in part from our improved understanding of disease causation which was built using disciplinary-specific, monocausal approaches to the study of disease emergence. Subsequently, empirical inquiries into the multi-factorial aetiology and the ‘web of causation’ of disease emergence have extended frameworks beyond simplistic, individualistic descriptions of disease causation. Nonetheless, much work is yet to be done to understand the roles of complex, intertwined, multi-level, social-ecological factors in affecting disease occurrence. We argue, a transdisciplinary-oriented, ISES lens is needed to explain the complexities of disease occurrence at various and interacting levels. More theoretical and empirical formulations, with evidence derived from various parts of the world, is also required to further the debate.

Our study advances the theoretical as well as empirical basis for considering an integrated human-nature systems approach to explaining disease occurrence at all levels so that factors at the individual, household/neighbourhood, local, regional and global levels are not treated in isolation.

DURING the past eighteen years, Elliott‐Automation Ltd. has developed and proved a concept of high‐reliability design in aviation control systems, which is now finding increasingly wide application outside the limits of its original conception.

A pæan of joy and triumph which speaks for itself, and which is a very true indication of how the question of poisonous adulteration is viewed by certain sections of “the trade,” and by certain of the smaller and irresponsible trade organs, has appeared in print. It would seem that the thanks of “the trade” are due to the defendants in the case heard at the Liverpool Police Court for having obtained an official acknowledgment that the use of salicylic acid and of other preservatives, even in large amounts, in wines and suchlike articles, is not only allowable, but is really necessary for the proper keeping of the product. It must have been a charming change in the general proceedings at the Liverpool Court to listen to a “preservatives” case conducted before a magistrate who evidently realises that manufacturers, in these days, in order to make a “decent” profit, have to use the cheapest materials they can buy, and cannot afford to pick and choose; and that they have therefore “been compelled” to put preservatives into their articles so as to prevent their going bad. He was evidently not to be misled by the usual statement that such substances should not be used because they are injurious to health— as though that could be thought to have anything to do with the much more important fact that the public “really want” to have an article supplied to them which is cheap, and yet keeps well. Besides, many doctors and professors were brought forward to prove that they had never known a case of fatal poisoning due to the use of salicylic acid as a preservative. Unfortunately, it is only the big firms that can manage to bring forward such admirable and learned witnesses, and the smaller firms have to suffer persecution by faddists and others who attempt to obtain the public notice by pretending to be solicitous about the public health. Altogether the prosecution did not have a pleasant time, for the magistrate showed his appreciation of the evidence of one of the witnesses by humorously rallying him about his experiments with kittens, as though any‐one could presume to judge from experiments on brute beasts what would be the effect on human beings—the “lords of creation.” Everyone reading the evidence will be struck by the fact that the defendant stated that he had once tried to brew without preservatives, but with the only result that the entire lot “went bad.” All manufacturers of his own type will sympathise with him, since, of course, there is no practicable way of getting over this trouble except by the use of preservatives; although the above‐mentioned faddists are so unkind as to state that if everything is clean the article will keep. But this must surely be sheer theory, for it cannot be supposed that there can be any manufacturer of this class of article who would be foolish enough to think he could run his business at a profit, and yet go to all the expense of having the returned empties washed out before refilling, and of paying the heavy price asked for the best crude materials, when he has to compete with rival firms, who can use practically anything, and yet turn out an article equal in every way from a selling point of view, and one that will keep sufficiently, by the simple (and cheap) expedient of throwing theory on one side, and by pinning their faith to a preservative which has now received the approval of a magistrate. Manufacturers who use preservatives, whether they are makers of wines or are dairymen, and all similar tradesmen, should join together to protect their interests, for, as they must all admit, “the welfare of the trade” is the chief thing they have to consider, and any other interest must come second, if it is to come in at all. Now is the time for action, for the Commission appointed to inquire into the use of preservatives in foods has not yet given its decision, and there is still time for a properly‐conducted campaign, backed up by those “influential members of the trade” of whom we hear so much, and aided by such far‐reaching and brilliant magisterial decisions, to force these opinions prominently forward, in spite of the prejudice of the public; and to insure to the trades interested the unfettered use of preservatives,—which save “the trade” hundreds of thousands of pounds every year, by enabling the manufacturers to dispense with heavily‐priced apparatus, with extra workmen and with the use of expensive materials,—and which are urgently asked for by the public,—since we all prefer to have our foods drugged than to have them pure.

The Sanitary Committee of a certain County Council, strong with the strength of recent creation, have lately been animated by a desire to distinguish themselves in some way, and, proceeding along the lines of least resistance, they appear to have selected the Public Analyst as the most suitable object for attack. The charge against this unfortunate official was not that he is incompetent, or that he had been in any way negligent of his duties as prescribed by Act of Parliament, but simply and solely that he has the temerity to reside in London, which city is distant by a certain number of miles from the much favoured district controlled by the County Council aforesaid. The committee were favoured in their deliberations by the assistance of no less an authority than the “Principal” of a local “Technical School”;—and who could be more capable than he to express an opinion upon so simple a matter? This eminent exponent of scientific truths, after due and proper consideration, is reported to have delivered himself of the opinion that “scientifically it would be desirable that the analyst should reside in the district, as the delay occasioned by the sending of samples of water to London is liable to produce a misleading effect upon an analysis.” Apparently appalled by the contemplation of such possibilities, and strengthened by another expression of opinion to the effect that there were as “good men” in the district as in London, the committee resolved to recommend the County Council to determine the existing arrangement with the Public Analyst, and to appoint a “local analyst for all purposes.” Thus, the only objection which could be urged to the employment of a Public Analyst resident in London was the ridiculous one that the composition of a sample of water was likely to seriously alter during the period of its transit to London, and this contention becomes still more absurd when it is remembered that the examination of water samples is no part of the official duty of a Public Analyst. The employment of local scientific talent may be very proper when the object to be attained is simply the more or less imperfect instruction of the rising generation in the rudiments of what passes in this country for “technical education”; but the work of the Public Analyst is serious and responsible, and cannot be lightly undertaken by every person who may be acquainted with some of the uses of a test‐tube. The worthy members of this committee may find to their cost, as other committees have found before them, that persons possessing the requisite knowledge and experience are not necessarily indigenous to their district. Supposing that the County Council adopts the recommendation, the aspirations of the committee may even then be strangled in their infancy, as the Local Government Board will want to know all about the matter, and the committee will have to give serious and valid reasons in support of their case.

“IN the event of war, electrical equipment will be reduced to a minimum and all radio will be removed from aircraft in order to carry more ammunition or an extra bomb.” What the reader's reactions are to that quotation, I do not know, but what I do know is that it is typical of remarks made by people of importance in the aircraft industry before 1939.

Wood as a structural material has one feature which is unique among all structural materials; it is a crop which can be formed, whereas its competitors such as stone, brick, metal and plastic are all derived from exhaustible mineral sources.

The relatively new and rapidly growing field of biotechnology encompasses several disciplines, including microbiology, biochemistry, and chemical engineering. The critical elements in biotechnology, which is not itself a discipline, are a biological organism or system, human intervention in the natural process, and the application of the results to an industrial process. One of the most dramatic and most basic examples of biotechnology is recombinant DNA technology, or genetic engineering, which involves the manipulation of genetic material. The production of genetically engineered organisms on a large scale for use in industrial processes combines the efforts of biologists and engineers. Microorganisms and other biological agents such as enzymes, whole cells, and cell components are used in industrial processes in the pharmaceutical, chemical, and food industries; and in energy production, agriculture, aquaculture, mining, waste disposal, and pollution control.

This chapter examines interlocks among the governing boards of 12 leading policy-planning organizations and changes in the structure of this network between 1973 and 2000. Methods of multidimensional scaling and hierarchical clustering are used to construct topographical maps of the pattern of interlocks among policy-planning groups and their change over time. In contrast to the findings on corporate interlocking directorates, the study shows that board interlocks among policy-planning organizations are substantively meaningful and relatively stable at the dyadic level, although several changes in the topology of the network are also found. In all three decades, big-business “moderate-conservatives” like the Business Council and the Business Roundtable occupied the most central locations in the network. In the 1970s these organizations were linked with the “corporate liberals” to form the core cluster of the policy network. In the 1980s and 1990s the corporate liberals became relatively isolated from the core and their places were taken by several conservative groups. There was also a sharp rise in the cohesion of the network in the late 1970s and 1980s – a period that is widely seen as one of conservative political mobilization and heightened political unity among business elites. These changes in the structure of the policy network are consistent with and help to account for the rightward shift in U.S. state policy during this period.