Search results

The purpose of this paper is to explore concepts and manufacturing issues for the emerging piezo on silicon technology being used in ultra‐sound devices. Development of 3D silicon‐on‐silicon structures is now under way. Additional functionality can be achieved using piezoelectric‐on‐silicon structures and work in this area has started. A commercialisation road map is required, specifying development of the design and fabrication techniques from research to high volume and lower volume high‐value manufacture of niche products.

This conceptual paper outlines processes needed, along with their possible sources with illustrations of present capabilities. Included are surface finishing techniques such as grinding, bonding technology for dissimilar materials, and through‐wafer‐via fabrication. Control of acoustic propagation, thermal expansion and electric field fringing effects will be considered.

Areas that require research and development are identified with possible starting points using techniques already used in other applications. Strong emphasis on empirical research highlights possible issues with examples including surface finishing and wafer dicing to show current methods.

Archetypal pixellated piezoelectric‐on‐silicon structures highlight critical points. In the authors' work, such pixellated structures occur in 1‐3 connectivity piezoelectric ceramic‐polymer composites with unit cell length scales from several millimetres, manufactured with mechanical dicing, to less than 50 μm, manufactured with micro‐moulding.

A forward looking approach of “thinking freely” is taken, this opens up potential manufacturing routes and ideas precluded from an iterative approach.

The conclusion suggests the criteria for a “design for” approach linked to either bottom up or top down assembly techniques for the integration of conventional and unusual piezoelectric materials with silicon in 3D structures.

Our Dublin correspondent telegraphed last night:

The experimental parliamentary subsidy on knights' fees and freehold incomes from lands and rents of 1431 was the only English direct lay tax of the Middle Ages which broke down. As such, this subsidy has a clear historiographical significance, yet previous scholars have tended to overlook it on the grounds that parliament's annulment act of 1432 mandated the destruction of all fiscal administrative evidence. Many county assessments from 1431–1432 do, however, survive and are examined for the first time in this article as part of a detailed assessment of the fiscal and administrative context of the knights' fees and incomes tax. This impost constituted a royal response to excess expenditures associated with Henry VI's “Coronation Expedition” of 1429–1431, the scale of which marked a decisive break from the fiscal-military strategy of the 1420s. Widespread confusion regarding whether taxpayers ought to pay the feudal or the non-feudal component of the 1431 subsidy characterized its botched administration. Industrial scale under-assessment, moreover, emerged as a serious problem. Officials' attempts to provide a measure of fiscal compensation by unlawfully double-assessing many taxpayers served to increase administrative confusion and resulted in parliament's annulment act of 1432. This had serious consequences for the crown's finances, since the regime was saddled with budgetary and debt problems which would ultimately undermine the solvency of the Lancastrian state.

At a recent inquest upon the body of a woman who was alleged to have died as the result of taking certain drugs for an improper purpose, one of the witnesses described himself as “an analyst and manufacturing chemist,” but when asked by the coroner what qualifications he had, he replied : “I have no qualifications whatever. What I know I learned from my father, who was a well‐known ‘F.C.S.’” Comment on the “F.C.S.” is needless.

A collection of essays by a social economist seeking to balance economics as a science of means with the values deemed necessary to man′s finding the good life and society enduring as a civilized instrumentality. Looks for authority to great men of the past and to today′s moral philosopher: man is an ethical animal. The 13 essays are: 1. Evolutionary Economics: The End of It All? which challenges the view that Darwinism destroyed belief in a universe of purpose and design; 2. Schmoller′s Political Economy: Its Psychic, Moral and Legal Foundations, which centres on the belief that time‐honoured ethical values prevail in an economy formed by ties of common sentiment, ideas, customs and laws; 3. Adam Smith by Gustav von Schmoller – Schmoller rejects Smith′s natural law and sees him as simply spreading the message of Calvinism; 4. Pierre‐Joseph Proudhon, Socialist – Karl Marx, Communist: A Comparison; 5. Marxism and the Instauration of Man, which raises the question for Marx: is the flowering of the new man in Communist society the ultimate end to the dialectical movement of history?; 6. Ethical Progress and Economic Growth in Western Civilization; 7. Ethical Principles in American Society: An Appraisal; 8. The Ugent Need for a Consensus on Moral Values, which focuses on the real dangers inherent in there being no consensus on moral values; 9. Human Resources and the Good Society – man is not to be treated as an economic resource; man′s moral and material wellbeing is the goal; 10. The Social Economist on the Modern Dilemma: Ethical Dwarfs and Nuclear Giants, which argues that it is imperative to distinguish good from evil and to act accordingly: existentialism, situation ethics and evolutionary ethics savour of nihilism; 11. Ethical Principles: The Economist′s Quandary, which is the difficulty of balancing the claims of disinterested science and of the urge to better the human condition; 12. The Role of Government in the Advancement of Cultural Values, which discusses censorship and the funding of art against the background of the US Helms Amendment; 13. Man at the Crossroads draws earlier themes together; the author makes the case for rejecting determinism and the “operant conditioning” of the Skinner school in favour of the moral progress of autonomous man through adherence to traditional ethical values.

The Howard Shuttering Contractors case throws considerable light on the importance which the tribunals attach to warnings before dismissing an employee. In this case the tribunal took great pains to interpret the intention of the parties to the different site agreements, and it came to the conclusion that the agreed procedure was not followed. One other matter, which must be particularly noted by employers, is that where a final warning is required, this final warning must be “a warning”, and not the actual dismissal. So that where, for example, three warnings are to be given, the third must be a “warning”. It is after the employee has misconducted himself thereafter that the employer may dismiss.

A point repeatedly brought forward for the defence, or at all events for the purpose of mitigating the fine, in adulteration cases, is the statement that defendant's goods have been analysed on former occasions and have been found genuine. As illustrating the slight value of analyses of previous samples may be taken the average laudatory analyses on patent or proprietary foods, drinks, or medicine. The manufacturer calculates—and calculates rightly—that the general public will believe that the published analysis of a particular specimen which had been submitted to the analytical expert by the manufacturer himself, guarantees all the samples on the market to be equally pure. History has repeatedly proved that in 99 cases out of 100 the goods found on the market fall below the quality indicated by the published analyses. Not long ago a case bearing on this matter was tried in court, where samples of cocoa supplied by the wholesale firm were distributed; but, when the retailer tried to sell the bulk of the consignment, he had repeated complaints from his customers that the samples were a very much better article than what he was then supplying. He summoned the wholesale dealer and won his case. But what guarantee have the general public of the quality of any manufacturer's goods—unless the Control System as instituted in Great Britain is accepted and applied ? Inasmuch as any manufacturer who joins the firms under the British Analytical Control thereby undertakes to keep all his samples up to the requisite standard; as his goods thenceforth bear the Control stamp; and as any purchaser can at any time submit a sample bought on the open market to the analytical experts of the British Analytical Control, free of any charge, to ascertain if the sample is up to the published and requisite standard, it is plain that a condition of things is created which not only protects the public from being cheated, but also acts most beneficially for these firms which are not afraid to supply a genuine article. The public are much more willing to buy an absolutely guaranteed article, of which each sample must be kept up to the previous high quality, rather than one which was good while it was being introduced, but as soon as it became well known fell off in quality and continued to live on its reputation alone.

A MAN'S LAST WORDS carry presumption of credibility not associated with utterances made earlier in life. William Shakespeare acknowledged this credibility in at least three of his plays. When the physician, Cornelius, told Cymbeline that the Queen had confessed that she loved him not, Cymbeline declared, ‘She alone knew this;/And, but she spoke it dying, I would not/Believe her lips in opening it.’

In 1899 the medical practitioners of Dublin were confronted with an outbreak of a peculiar and obscure illness, characterised by symptoms which were very unusual. For want of a better explanation, the disorder, which seemed to be epidemic, was explained by the simple expedient of finding a name for it. It was labelled as “beri‐beri,” a tropical disease with very much the same clinical and pathological features as those observed at Dublin. Papers were read before certain societies, and then as the cases gradually diminished in number, the subject lost interest and was dropped.

The management of children′s literature is a search for value and suitability. Effective policies in library and educational work are based firmly on knowledge of materials, and on the bibliographical and critical frame within which the materials appear and might best be selected. Boundaries, like those between quality and popular books, and between children′s and adult materials, present important challenges for selection, and implicit in this process are professional acumen and judgement. Yet also there are attitudes and systems of values, which can powerfully influence selection on grounds of morality and good taste. To guard against undue subjectivity, the knowledge frame should acknowledge the relevance of social and experiential context for all reading materials, how readers think as well as how they read, and what explicit and implicit agendas the authors have. The good professional takes all these factors on board.