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Article
Publication date: 27 September 2023

Markus Brummer, Karl Jakob Raddatz, Matthias Moritz Schmitt, Georg Schlick, Thomas Tobie, Rüdiger Daub and Karsten Stahl

Numerous metals can be processed using the additive manufacturing process laser-based powder bed fusion of metals (PBF-LB/M, ISO/ASTM 52900). The main advantages of additive…

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Abstract

Purpose

Numerous metals can be processed using the additive manufacturing process laser-based powder bed fusion of metals (PBF-LB/M, ISO/ASTM 52900). The main advantages of additive manufacturing technologies are the high degree of design freedom and the cost-effective implementation of lightweight structures. This could be profitable for gears with increased power density, combining reduced mass with considerable material strength. Current research on additively manufactured gears is focused on developing lightweight structures but is seldom accompanied by simulations and even less by mechanical testing. There has been very little research into the mechanical and material properties of additively manufactured gears. The purpose of this study is to investigate the behavior of lightweight structures in additively manufactured gears under static loads.

Design/methodology/approach

This research identifies the static load-carrying capacity of helical gears with different lightweight structures produced by PBF-LB/M with the case hardening steel 16MnCr5. A static gear loading test rig with a maximum torque at the pinion of T1 = 1200 Nm is used. Further focus is set on analyzing material properties such as the relative density, microstructure, hardness depth profile and chemical composition.

Findings

All additively manufactured gear variants show no failure or plastic deformation at the maximum test load. The shaft hub connection, the lightweight hub designs and the gearing itself are stable and intact regarding their form and function. The identified material characteristics are comparable to conventionally manufactured gears (wrought and machined), but also some particularities were observed.

Originality/value

This research demonstrates the mechanical strength of lightweight structures in gears. Future research needs to consider the dynamic load-carrying capacity of additively manufactured gears.

Details

Rapid Prototyping Journal, vol. 29 no. 11
Type: Research Article
ISSN: 1355-2546

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Publication date: 10 November 2016

Markus Lamprecht, Siegfried Nagel and Hanspeter Stamm

This chapter examines the origins and institutionalization of sport sociology in Germany and Switzerland and provides an overview of the current state of research. It shows how…

Abstract

This chapter examines the origins and institutionalization of sport sociology in Germany and Switzerland and provides an overview of the current state of research. It shows how academic chairs and research committees were established and how the first textbooks, anthologies, and journals appeared from the 1970s onwards. The institutionalization process of German-speaking sport sociology proceeded parallel to the establishment of sport science. With regard to its theoretical and empirical basis, German-speaking sport sociology is rooted in theories and concepts of general sociology. Studies using a system theory perspective, conceptualizing sport as a societal sub-system and examining its linkage with and dependence on economy, media, or politics are particularly common in the German-speaking region. In addition, actor theoretic perspectives are very popular, and French sociologists such as Bourdieu and Foucault have had a marked influence on German-speaking sport sociology. A large number of sport sociology studies are concerned with the changes in leisure and elite sports. In this context, the emergence of new trends in risk sports as well as the fitness boom and its implications on body perception are of special interest. Further areas of research refer to sport participation and the impact of social inequality, particularly with respect to gender differences and social integration. Finally, organization research focusing on change at the level of sport associations and clubs has a long tradition. Major challenges for the future of German-speaking sport sociology include its internationalization and an enhanced international linkage in order to improve the visibility of research results.

Details

Sociology of Sport: A Global Subdiscipline in Review
Type: Book
ISBN: 978-1-78635-050-3

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Book part
Publication date: 31 January 2025

Emre Amasyalı and Axel van den Berg

The use of the concept of “agency,” in the sense of action that is to some extent free of “structural” constraints, has enjoyed enormous and growing popularity in the sociological…

Abstract

The use of the concept of “agency,” in the sense of action that is to some extent free of “structural” constraints, has enjoyed enormous and growing popularity in the sociological literature over the past several decades. In a previous paper, we examined the range of theoretical rationales offered by sociologists for the inclusion of the notion of “agency” in sociological explanations. Having found these rationales seriously wanting, in this paper we attempt to determine empirically what role “agency” actually plays in the recent sociological literature. We examine a random sample of 147 articles in sociology journals that use the concept of “agency” with the aim of identifying the ways in which the term is used and what function the concept serves in the sociological explanations offered. We identify four principal (often overlapping) uses of “agency”: (1) purely descriptive; (2) as a synonym for “power”; (3) as a way to identify resistance to “structural” pressures; and (4) as a way to describe intelligible human actions. We find that in none of these cases the notion of “agency” adds anything of analytical or explanatory value. These different uses have one thing in common, however: they all tend to use the term “agency” in a strongly normative sense to mark the actions the authors approve of. We conclude that “agency” seems to serve the purpose of registering the authors' moral or political preferences under the guise of a seemingly analytical concept.

Details

The Future of Agency
Type: Book
ISBN: 978-1-83608-978-0

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Article
Publication date: 12 March 2018

Gustavo Ferro and Ignacio Benito Amaro

Given the growing supply of wines and the large number of new consumers with purchasing power but lacking knowledge of the subtleties of high-quality wines, expert opinions are…

760

Abstract

Purpose

Given the growing supply of wines and the large number of new consumers with purchasing power but lacking knowledge of the subtleties of high-quality wines, expert opinions are used for consumers as proxies for quality. This study aims to determine the determinants of prices in top-quality wine market. The authors also seek to estimate the role for country of origin, grape, producing region and winery in prices. And, finally, the authors try to show how countries, regions and wineries can help increase their position in international rankings.

Design/methodology/approach

The authors try to answer: What factors explain the price of top-quality wines (defined as best rated in a standardized ranking)? To some extent, in the hands of producers influence prices, which imply long-term decisions or large investments in land and marketing. Other variables that consumer value does affect prices. The authors try also to detect undervalued or overvalued wines, grapes, regions, wineries or producer countries. The authors estimate an econometric model of hedonic prices using a 14-year sample of the Wine Spectator’s 100 top-rated wines for the American market between 2003 and 2016, totaling 1,400 observations. The sample is a great cross-section because each wine is unique.

Findings

The authors’ contribution is twofold: the determination of the price explanatory values and the identification and attribution of price differences by country, grape, region and winery. Also, the authors detected grapes, countries, regions and wineries which are overvalued or undervalued with respect to the average prediction of the model.

Research limitations/implications

The findings are useful to understand the role of price explanatory variables, as well as for making policy and managerial decisions. From the model, collective or managerial actions can be derived to increase particular wines’ positions in international rankings. The proxy for “quality” in the study is not the only possible definition.

Practical implications

In some cases, managerial choices could be conditioned by the policies or history. There is some room for collective action and public policies to improve regions’ and countries’ reputation.

Social implications

There are clear synergies for policies that can raise the prestige of countries and regions and their spillovers on the brand name reputation of individual wineries.

Originality/value

The results, policy and managerial implications are of interest for business, countries interested in improving their position in international rankings and for consumers to make more informed decisions.

Details

International Journal of Wine Business Research, vol. 30 no. 1
Type: Research Article
ISSN: 1751-1062

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Article
Publication date: 16 August 2022

Philippe Masset, Alexandre Mondoux and Jean-Philippe Weisskopf

This study aims to identify the price determinants of fine wines in a small and competitive market. These characteristics are found in many lesser-known wine-producing countries…

424

Abstract

Purpose

This study aims to identify the price determinants of fine wines in a small and competitive market. These characteristics are found in many lesser-known wine-producing countries and are often difficult to analyse because of lack of data.

Design/methodology/approach

This study hand-collects and transcribes wine-related data for 149 Swiss wineries and 2,454 individual wines over the period 2014–2018 directly from wine lists provided by wineries. This study uses multivariate ordinary least squares regressions to analyse the relation between wine attributes and prices and to assess the effect of a currency shock caused by the sudden appreciation of the Swiss franc in 2015 as well as a reduction in information asymmetries induced by the novel coverage of Swiss wines by The Wine Advocate.

Findings

Prices mainly depend on collective reputation, production techniques and product positioning. Surprisingly, following a sharp appreciation of the Swiss franc, producers did not reduce prices. The arrival of a highly influential wine expert on the market also had a positive price effect on rated wines and producers. Both hint at wineries attempting to position themselves relative to competitors.

Originality/value

Few studies examine the price drivers in lesser-known wine markets, where competition is fierce. This study’s results show that wine pricing differs from other more famous and larger wine regions. In addition, to the best of the authors’ knowledge, this study is also the first to analyse the impact of a currency shock and a reduction in information asymmetries on wine prices.

Details

International Journal of Wine Business Research, vol. 35 no. 1
Type: Research Article
ISSN: 1751-1062

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