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Additive manufactured (AM) skull models are increasingly used to plan complex surgical cases and design custom implants. The accuracy of such constructs depends on the standard tessellation language (STL) model, which is commonly obtained from computed tomography (CT) data. The aims of this study were to assess the image quality and the accuracy of STL models acquired using different CT scanners and acquisition parameters.

Images of three dry human skulls were acquired using two multi-detector row computed tomography (MDCT) scanners, a dual energy computed tomography (DECT) scanner and one cone beam computed tomography (CBCT) scanner. Different scanning protocols were used on each scanner. All images were ranked according to their image quality and converted into STL models. The STL models were compared to gold standard models.

Image quality differed between the MDCT, DECT and CBCT scanners. Images acquired using low-dose MDCT protocols were preferred over images acquired using routine protocols. All CT-based STL models demonstrated non-uniform geometrical deviations of up to +0.9 mm. The largest deviations were observed in CBCT-derived STL models.

While patient-specific AM constructs can be fabricated with great accuracy using AM technologies, their design is more challenging because it is dictated by the correctness of the STL model. Inaccurate STL models can lead to ill-fitting implants that can cause complications after surgery.

This paper suggests that CT imaging technologies and their acquisition parameters affect the accuracy of medical AM constructs.

The purpose of this paper is to investigate which factors stimulate or hinder the influence management accountants operating at the business unit (BU) level have on the decisions taken by their BU manager(s).

The authors collected data from 119 management accountants in 77 Dutch, multi-divisional organizations, using surveys.

The study shows that influence on managerial decisions can have two forms: influence on strategic decisions, and influence on operating decisions. Influence on strategic decisions is positively related to the degree of decentralization of an organization. It also depends on whether a management accountant is more extravert and emotionally stable. There is a negative relationship between influence on operational decisions and management accountants’ agreeableness. Not being sufficiently critical may well diminish their influence on operational affairs.

The authors put the view that management accountants at the BU level can partially affect their own role. This may also be expected by their managers. There are more opportunities for management accountants to influence strategic decisions than operational decisions. This study, however, is limited to Dutch, multi-divisional organizations. The management accountants who completed the survey also belong to the personal networks of master degree students who assisted in the data collection process, so that the sample used is not random. Data collected in another country, or in smaller companies could yield different results.

Knowing more about the complex relationship between BU management accountants’ personality traits and their degree of influence on managerial decisions allows organizations to make better-informed choices about who to appoint in such a role.

This study distinguishes between management accountants’ influence on strategic decisions and influence on operational decisions. At the BU level, these are two distinct concepts. This reinforces findings from earlier studies conducted at the corporate level. In addition, it turns out that specific personality traits of management accountants, at the BU level, affect the influence they can exert on both strategic and operational decisions taken by their manager(s).

A slowed rate of market growth, industrial over‐capacity, increased competition: these are just three “trend drivers” towards relationship marketing. Philip Kotler, one of the world’s leading marketing thinkers, has brought the philosophy of relationship marketing to bear on a key issue for marketing strategies, that of customer retention.

During the interwar period, the Netherlands experienced a phase of rapid industrialization and mechanization and saw the introduction of many new labor-saving techniques on the shop floor. This process, which went under the name “rationalization of production,” caused great concern in the labor movement and sparked an intensive debate over the existence and extent of technological (or permanent) unemployment. Although the problem of technological unemployment was denied by the mainstream economists of the day, the problem was addressed by left-wing, mathematically trained economists such as Theo van der Waerden and Jan Tinbergen. They sought for rigorous “scientific” arguments that would convince policymakers, colleagues, and the public of socialist employment policies.

This chapter shows that van der Waerden and Tinbergen used ever-increasing formal methods to face the issue of rationalization, which became politically relevant and controversial in the specific context of the interwar period. Their new scientific tools gave them esteem and influence. In their role as advisers to the government, they gained influence and were able to recommend policies that were in accordance with their political beliefs.

The purpose of this paper is to investigate the role of generation in teachers’ advice and information-seeking interactions in Flemish secondary school teams, and moreover how the content of advice shapes these interactions. Four content-related advice and information-seeking networks are investigated in this study: subject-matter knowledge, classroom management, innovative teaching methods and ICT.

Data were collected from 660 teachers in ten secondary education schools in Flanders (Belgium) by using an online socio-metric survey. Social network analysis was conducted, more specifically quadratic assignment procedure and multilevel P2 modeling.

The findings underline the importance of investigating content-related advice networks. Generation affects the formation of interactions. First, the results revealed that older teachers are less likely to ask advice on subject-matter knowledge, classroom management and innovative teaching methods. Second, the data showed that older teachers are more likely to be asked for advice on subject-matter knowledge. Third, young teachers are more likely to be asked for advice on innovative teaching methods and ICT. Fourth, homophily effects occurred for the youngest teachers when advice is about subject-matter knowledge, and for the oldest teachers for advice about classroom management.

This study is innovative due to its application of social network analysis to investigate intergenerational knowledge flows, and due to its clear focus on content-related advice-seeking interactions that go beyond the approach of general advice and information-seeking interactions.

CANADA, until the last generation or two, has been basically a pioneer country but two world wars have changed all this and the economy has moved from an agricultural to a manufacturing community able to provide a standard of living second to that of the United States. (At the present time only 10.8 per cent of Canadians live on farms according to the 1961 census.) Natural resources, such as timber, wheat and mining, continue to play, however, an important role in the life of the nation. As in most developing and pioneer countries, learning has had to assume a secondary role compared with other enterprises and activities. This is gradually beginning to change as more people continue in school and the percentage of individuals attending university increases. Established organizations, like the National Film Board and the Canadian Broadcasting Corporation, catering to mass culture, have been strengthened and enlarged and new establishments, like the Canada Council and the Stratford Shakespearean Festival, of narrower function and appeal, have been set up. The Library movement, not the least of learning agencies, is gaining strength every day. In this paper some of the interesting new developments of the last ten years in the latter field will be discussed. Of necessity, much is abbreviated; a lot is ignored. Data selected has been based on the most recent sources; hence the variety in dates.

This paper argues for an increased volume of references to Gabriel Tarde and Georg Simmel in the field of organization sociology. The text emphasizes the importance of these two sociologists in understanding the role of imperfection in organizing and the phenomena of fashion and imitation in contemporary organizations. Tarde’s theory challenged the antinomy between continuity and discontinuity, considering finite entities as cases of infinite processes and stable situations as transitory. Simmel’s theory of fashion explores the democratic and democratizing nature of fashion, which satisfies the demand for social adaptation and differentiation. They both saw fashion as a selection mechanism for organizational forms and managerial practices. Furthermore, referring to Tarde and Simmel can help counter the overemphasis on identity construction and the neglect of alterity in social sciences. The construction of identity often overlooks the inevitability of difference and alterity, which are essential aspects of collective projects. Lastly, this paper discusses Simmel’s concept of the stranger and its relevance in analyzing the experiences of foreigners and their potential advantages as “double strangers” in academia and society. The conclusion is that Tarde and Simmel’s contributions offer valuable insights for understanding the dynamics of management, organizing, and social interactions in contemporary organizations.

The Daily Telegraph has recently published several articles and a considerable amount of correspondence relating to malt whisky and the tricks of the whisky trade. As is usually the case when a daily newspaper takes up a subject of this kind, a number of well ‐ meaning people make a variety of suggestions as to what ought to be done to secure the purification of the particular Augean stable under discussion and to ensure the reception by the purchaser of the article which he really desires to have. But what ought to be done and what can be done are two very different things, and the question of what it is possible to do in the present state of scientific knowledge—and under the existing law as it is at present administered— is, as a rule, avoided by the writers referred to. It has been suggested, for instance, that it should be made compulsory that all vessels in which spirits are sold should bear a label distinctly stating the exact nature of the contents of such vessels. This would be an excellent suggestion if it could be effectively carried out, but, before this can be done, it is necessary to devise a method of compulsion. A man who sells as malt whisky an article mainly or entirely composed of spirit to which that title should not be applied would not have any very serious scruples as to the truth of the statements which appear on his labels. He must be compelled to act honestly by some sufficient force, and, short of a law which would permit the manufacture and “blending” of whisky to be carried out by certain persons only, according to specified rules, and under strict Government supervision in every case, no legislative enactments whatever would have the effect of preventing the various forms of this particular fraud. At present there are no legal definitions whereby the composition and characters of the articles described as “malt whisky” and “whisky” are laid down, excepting the definitions which may be held to be implied in the application of the 6th section of the Sale of Food and Drugs Act of 1875 to the case. This section requires that an article shall be of the “nature, substance, and quality demanded by the purchaser.” On the strength of this section it is quite unjustifiably assumed that the compulsion referred to can be effectively secured by the operation of the Sale of Food and Drugs Acts. According to our legal system it is essential under the criminal Acts— and the Food Adulteration Acts are criminal Acts—for the prosecuting authority to prove beyond all possibility of question that a person charged with an offence is guilty of that offence, and, in regard to the matter under consideration, it would therefore be necessary to absolutely prove by scientific evidence that any given mixed spirit, for the sale of which as malt whisky a prosecution had been instituted, was not of the nature, substance, and quality of the article demanded. Under the present conditions relating to sampling under the Acts this would be impracticable, except, possibly, on very broad lines; and, assuming that scientific investigation resulted in the possibility of fixing clear and definite points of distinction between the true and the false, there would still be the enormous difficulties and the heavy expenses attending the proving of offences of this character to the satisfaction of the Courts—difficulties and expenses which local authorities cannot fairly be expected to face. If, after the lengthy and expensive investigations that would be necessary, and which could only be properly carried out with Government aid, by a scientific Commission appointed by the Government, it were found possible to establish working definitions and standards, these would necessarily be only applicable to a limited extent, just as is at present the case in regard to milk and butter; while the question of quality can never be dealt with under repressive Acts of, Parliament of any kind. Assuming the establishment of standards of some kind we fully admit the possibility, under altered legal conditions, of checking the grosser forms of whisky sophistication by the employment of legal machinery, as is done with various other products; but vast amounts of various spirit mixtures could still be sold under false names with impunity. We should still have with us the legalised inferiority and the legalised adulteration of comparatively minor type which we have in the case of milk and butter. What is required and what alone can be effective, in dealing with sophistications which the law can never reach, is the provision of adequate and entirely independent guarantees which are based both on permanently‐applied analytical investigations carried out upon quantities of material which are not absurdly limited, and on a system of permanent and independent inspection,—both being supplied by some authority or authorities of sufficient standing. While the statements made by a reputable firm ought to carry weight, and ought, no doubt, to be accepted as valuable so far as they go, there is always necessarily and obviously a great element of weakness in the declarations put forward by a firm with respect to its own products. Particularly in view of modern commercial conditions something very much stronger than a personal asseveration as to the purity and excellence of one's own goods is now in reality required. That this is the case is shown by the fact that the demand for independent guarantees has recently been repeatedly voiced in the general press. The public are badly in want of education on all such questions and the Daily Telegraph is entitled to the thanks of the community for having initiated a discussion which can only be productive of good results in this direction.

Industrial feudalism is a socio-economic formation of advanced capitalist countries in which society becomes stratified into closed, hierarchically-defined social groups. In the writings of Ludwik Krzywicki and Oskar Lange, industrial feudalism is associated with the dominance of monopoly finance capital. The chapter extends this analysis of twenty-first century capitalism in which social groups are differentiated by the kind of property that they own and hence the kind of credit to which they have access to prevent becoming déclassé. However asset inflation then inhibits upward social mobility, confining households to their inherited social class. This inhibits labour mobility. But the availability of credit for the propertied classes also defines attitudes towards state welfare provision.