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This paper aims to present an investigation into the variation of scan vector hatch rotation strategies in selective laser melting (SLM), focussing on how it effects density, surface roughness, tensile strength and residual stress.

First the optimum angle of hatch vector rotation is proposed by analysing the effect of different increment angles on distribution of scan vectors. Sectioning methods are then used to determine the effect that the chosen strategies have on the density of the parts. The top surface roughness was analysed using optical metrology, and the tensile properties were determined using uni-axial tensile testing. Finally, a novel multi-support deflection geometry was used to quantify the effects of rotation angles on residual stress.

The results of this research showed that the hatch rotation angle had little effect on the density, top surface roughness and strength of the parts. The greatest residual stress deflection was measured parallel to unidirectional scan vectors. The use of hatch rotations other than alternating 90° showed little benefit in lowering the magnitude of residual stresses. However, the use of rotation angles with a good suitability measure distributes stresses in all directions more evenly for certain part geometries.

All samples produced in this work were made from commercially pure titanium, therefore care must be taken when applying these results to other materials.

This paper serves to increase the understanding of SLM scanning strategies and their effect on the properties of the material.

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 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.

This chapter explores the origins of the theme of competitive advantage in 19th and early 20th century economics. This theme, which forms the core of modern Strategic Management, was a battleground for debates about the value of abstract theory versus observations about real-life events. Intellectual genealogies, citations, and other sources show the central roles played by the University of Vienna and Harvard University. These two institutions strongly influenced the theory of monopolistic competition as well as all three modern views of competitive advantage – the industrial as expressed by Porter, the resource-based as expressed by Penrose, and the evolutionary as expressed by Schumpeter.

The archives of François Perroux deposited at IMEC bear witness to the fact that he has devoted, beyond his scientific production, great energy to the most material aspects of research: setting up and maintaining networks to publicize his work and that of other economists, either directly or through the institutes and the journals he headed; organize seminars and symposiums; take care of relations with colleagues and the press; create collections and journals; and so on.

In this chapter, we concentrate our attention on the archives relating to the management of the institutes, those attesting to the lines and themes of the producer’s research, and those concerning his important correspondence.

Thanks to the archives deposited at IMEC, it is possible to follow the development of the theoretical work of François Perroux by contextualizing it. They also show the itinerary of a Christian intellectual, whose attachment to social Catholicism constitutes a guiding thread and is reflected in all his activities. Finally, the archives illuminate his substantial role in the institutionalization of research in economics in the France of the twentieth century.

President, Charles S. Goldman, M.P.; Chairman, Charles Bathurst, M.P.; Vice‐Presidents: Christopher Addison, M.D., M.P., Waldorf Astor, M.P., Charles Bathurst, M.P., Hilaire Belloc, Ralph D. Blumenfeld, Lord Blyth, J.P., Colonel Charles E. Cassal, V.D., F.I.C., the Bishop of Chichester, Sir Arthur H. Church, K.C.V.O., M.A., D.Sc., F.R.S., Sir Wm. Earnshaw Cooper, C.I.E., E. Crawshay‐Williams, M.P., Sir Anderson Critchett, Bart., C.V.O., F.R.C.S.E., William Ewart, M.D., F.R.C.P., Lieut.‐Colonel Sir Joseph Fayrer, Bart., M.A., M.D., Sir Alfred D. Fripp, K.C.V.O., C.B., M.B., M.S., Sir Harold Harmsworth, Bart., Arnold F. Hills, Sir Victor Horsley, M.D., F.R.C.S., F.R.S., O. Gutekunst, Sir H. Seymour King, K.C.I.E., M.A., the Duke of Manchester, P.C., Professor Sir Wm. Osler, Bart., M.D., F.R.S., Sir Gilbert Parker, D.C.L., M.P., Sir Wm. Ramsay, K.C.B., LL.D., M.D., F.R.S., Harrington Sainsbury, M.D., F.R.C.P., W. G. Savage, M.D., B.Sc., R. H. Scanes Spicer, M.D., M.R.C.S., the Hon. Lionel Walrond, M.P., Hugh Walsham, M.D., F.R.C.P., Harvey W. Wiley, M.D., Evelyn Wrench.

Through the energetic initiative of “The Globe” newspaper a Middle Classes Union has been formed for the purpose of organising that great body of people into an Alliance that shall be capable of making its power felt. A preliminary meeting was held recently under the presidency of Major J. R. Pretyman Newman, M.P., of gentlemen interested in the scheme recently outlined in “The Globe” for combining the Middle Classes in a Union for their own protection. All present were unanimous as to the necessity for the formation of such an organisation, and after discussion it was provisionally agreed that its title should be—

IT is fitting that a new series of this magazine should be introduced by some reflections on the whole question of book selection, both for the general public and libraries.

It is now forty years since there appeared H. R. Plomer's first volume Dictionary of the booksellers and printers who were at work in England, Scotland and Ireland from 1641 to 1667. This has been followed by additional Bibliographical Society publications covering similarly the years up to 1775. From the short sketches given in this series, indicating changes of imprint and type of work undertaken, scholars working with English books issued before the closing years of the eighteenth century have had great assistance in dating the undated and in determining the colour and calibre of any work before it is consulted.