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Article
Publication date: 15 August 2019

James Damon, Stefan Dietrich, Sasidhar Gorantla, Uwe Popp, Brando Okolo and Volker Schulze

This study aims to investigate the correlation between build orientation characteristics, part porosity and mechanical properties of the fused filament fabrication (FFF) process…

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Abstract

Purpose

This study aims to investigate the correlation between build orientation characteristics, part porosity and mechanical properties of the fused filament fabrication (FFF) process to provide insight into pore formation mechanisms and to establish guidelines for optimal process configurations.

Design/methodology/approach

Micro computed tomography and metallographic sections provide the basis for a correlation between porosity and extrusion path. Using the correlations found in this study, the way to improve printing strategies and filament properties can be deduced directly from an analysis of the print path and the final influence on mechanical performance.

Findings

With metal-FFF 3D printing technology, near-dense parts (0.5 Vol.%) can be fabricated. The pore architecture is strongly connected to the build direction and print strategy with parallel, elongated pore channels. Mechanical values of FFF samples are similar to metal injection-molded (MIM) parts, except the elongation to fracture. The high difference of yield strength of sintered samples compared to laser powder bed fusion (LPBF) samples can be attributed to the finer grains and a Hall–Petch hardening effect. The conclusions derived from this study are that the presented process is capable of producing comparable part qualities compared to MIM samples, with higher build rates in comparison to LPBF processes.

Originality/value

316L stainless steel was successfully manufactured via FFF. This paper also addresses the effects of scanning strategies on the resulting porosity and proposes improvements to reduce residual porosity, thus increasing the mechanical performance in the future.

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Article
Publication date: 1 February 1992

MORE than 80 delegates from 20 countries attended the two‐day International Symposium on Remote Visual Inspection of Aircraft at the Edwardian International Hotel, Heathrow…

34

Abstract

MORE than 80 delegates from 20 countries attended the two‐day International Symposium on Remote Visual Inspection of Aircraft at the Edwardian International Hotel, Heathrow, London, in December.

Details

Aircraft Engineering and Aerospace Technology, vol. 64 no. 2
Type: Research Article
ISSN: 0002-2667

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Publication date: 28 September 2018

Helen Jefferson Lenskyj

Abstract

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Gender, Athletes’ Rights, and the Court of Arbitration for Sport
Type: Book
ISBN: 978-1-78743-753-1

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Book part
Publication date: 20 June 2017

David Shinar

Free Access. Free Access

Abstract

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Traffic Safety and Human Behavior
Type: Book
ISBN: 978-1-78635-222-4

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Article
Publication date: 1 October 1992

John Conway O'Brien

Schmoller reserves his admiration for those entrepreneurs whosucceeded in the acquisition of wealth but whose primary goal wasthe promotion of the public interest. Such…

96

Abstract

Schmoller reserves his admiration for those entrepreneurs who succeeded in the acquisition of wealth but whose primary goal was the promotion of the public interest. Such individuals as List, Steiner, Geibel, Abbe and von Mevissen are of this sort. Schmoller is lavish in his praise of them. Schmoller is critical of the natural economy of Adam Smith where each individual is activated by his own self‐interest. Schmoller sees in the higher law a guide to human behaviour. Moneymakers are not necessarily men of great talent. For this reason Schmoller prefers the man who is driven by the pursuit of idealistic goals. Schmoller′s historical approach to the political economy, one shared by some in the Western world, is to be contrasted with the view that the best type of social order permits the individual to pursue his self‐interest and that such a pursuit is in keeping with the social interest.

Details

International Journal of Social Economics, vol. 19 no. 10/11/12
Type: Research Article
ISSN: 0306-8293

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Article
Publication date: 10 November 2021

Leonada Raphael Mwagike and Ismail Abdi Changalima

This paper analyzes procurement negotiators' skills and attributes by considering perceptions of procurement professionals in Tanzania.

1013

Abstract

Purpose

This paper analyzes procurement negotiators' skills and attributes by considering perceptions of procurement professionals in Tanzania.

Design/methodology/approach

This study employed a cross-sectional research design in which procurement professionals' opinions were collected through questionnaires. The study proposed that the skills and attributes of procurement negotiators are necessary for negotiation proceedings, and they were tested through confirmatory factor analysis.

Findings

Findings suggest that listening skills, persuasion skills, communication skills and planning skills are all important skills that contribute to overall procurement negotiation skills. Furthermore, trust, flexibility, honesty and emotion are statistically determined to be necessary attributes for procurement negotiators. All of the observed variables were statistically significant (p < 0.001) and contributed positively to explaining the skills and attributes of procurement negotiators.

Research limitations/implications

The sample included only respondents from a single country. This may affect the generalization of results as there is a variation in institutional regulatory compliance governing public procurement undertakings in different countries. Also, the study did not include the outcome of negotiation proceedings and relied only on opinions collected from the procurement professionals in Tanzania.

Practical implications

This study's findings provide suggestions for practitioners on the necessary skills and attributes of procurement negotiators that might be well considered when appointing members of negotiation teams for procurement deals.

Originality/value

This paper adds value to the existing literature on the necessary skills and attributes of members of negotiation teams for procurement undertakings in the public sector.

Details

International Journal of Public Sector Management, vol. 35 no. 1
Type: Research Article
ISSN: 0951-3558

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Article
Publication date: 17 May 2022

Cemal İrfan Çalışkan and Ümit Arpacıoğlu

The purpose of this article is on the functional usability of metal additive manufacturing (AM) direct metal laser sintering (DMLS) production technology process parameters in the…

259

Abstract

Purpose

The purpose of this article is on the functional usability of metal additive manufacturing (AM) direct metal laser sintering (DMLS) production technology process parameters in the construction industry. In the study, the advantages of thermal optimization and weight reduction in the case of the use of foam metals obtained by changing the hatch distance the production process parameter, in the production of facade panels in the architectural field are revealed.

Design/methodology/approach

The methods in the study; production of the small scaled facade panels with nine different hatch distance parameters, determination of the thermal change with the infrared thermography method, microstructure examination, weight measurement.

Findings

The paper lays the groundwork for the manufacturability of lighter and lower thermal conductivity facade panels by changing the hatch distance parameters. Within the scope of the study, the definition of semi-open-cell foam aluminum and the product screening strategy offers innovation. Within the scope of the study, this scope is shared as an algorithmic summary. In addition, the study offers a new perspective within the scope of multiple optimizable panel production in facade panels with AM technology.

Originality/value

Hatch distance parameter change was first discussed in this study in the architectural field, and a semi-open cell foam aluminum panel was obtained with the scanning strategy determined within the scope of the study. This panel geometry, which is defined as semi-open cell foam aluminum, can be used as a design element by painting or coating the outer surface, it can be stated that it will also provide thermal and weight optimization.

Details

Rapid Prototyping Journal, vol. 28 no. 9
Type: Research Article
ISSN: 1355-2546

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Article
Publication date: 12 December 2023

Yang Zhang, Hui Li and Zeliang Yao

The study aims to investigate the effects of intellectual capital and its constituents on the performance of listed companies operating in China's construction sector. The study…

695

Abstract

Purpose

The study aims to investigate the effects of intellectual capital and its constituents on the performance of listed companies operating in China's construction sector. The study also intends to examine the moderating role of digital transformation.

Design/methodology/approach

Hypotheses will be tested using Modified Value-Added Intellectual Capital (MVAIC). The sample will be comprised of 93 Shenzhen and Shanghai A-share listed companies within the construction industry from the period of 2015–2021. Multiple regression analysis was employed to investigate the influence of intellectual capital, its components and digital transformation on the performance of construction firms.

Findings

The study's results reveal that the performance of construction firms greatly depends on intellectual capital and its components. Furthermore, digital transformation plays a vital moderating role between intellectual capital and its components and construction firm performance.

Practical implications

This study addresses a critical inquiry on how construction managers can employ intellectual capital to enhance the performance of firms during digital transformation. Additionally, this research bridges this gap by guiding construction managers to concentrate on their external surroundings when examining firm performance.

Originality/value

By focusing on the predictors influencing construction firms' performance, this study contributes to the existing corpus of knowledge. This study employs resource orchestration theory (ROT) to determine how the different components of intellectual capital impact the performance of construction firms, with digital transformation acting as a moderating variable. This research will be valuable to researchers, construction industry professionals and policymakers.

Details

Engineering, Construction and Architectural Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0969-9988

Keywords

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Article
Publication date: 1 February 2011

Martha A. Martinez and Howard E. Aldrich

The purpose of this paper is to explore how cohesive/diverse networks affect entrepreneurial activities. In particular, an interest is shown in how cohesion and diversity may…

10662

Abstract

Purpose

The purpose of this paper is to explore how cohesive/diverse networks affect entrepreneurial activities. In particular, an interest is shown in how cohesion and diversity may affect entrepreneurial outcomes like survival, profitability, innovation and efficiency.

Design/methodology/approach

The paper organizes the literature and presents conclusions about the effects of cohesion and diversity using three stages of entrepreneurial activity: opportunity development, technology and organizational creation, and exchange.

Findings

At the opportunity stage, strong ties with entrepreneurs increase the likelihood of becoming one, but are associated with lower levels of innovation. Diverse ties increase self‐efficacy and innovation. At the technology and organizational creation stage, most entrepreneurial teams are homogeneous whereas team diversity is associated with better organizational outcomes. Using strong ties to recruit potential employees provides price and commitment advantages, but may interfere with efficiency. At the exchange stage, entrepreneurs must strike a balance between weak (market based) and stronger (embedded) ties to gain preferential access to resources and customers, while maintaining diverse sources for information and market opportunities. Overall, cohesion through strong ties provides entrepreneurs with hard to find resources very early in the development of new ventures, but those resources are limited in scope and have a high cost. By contrast, diversity is more common and more important later in a venture's life cycle.

Originality/value

Guidelines are suggested regarding the best networking strategies at the different stages and in different instrumental areas, offering an overall evaluation of the evidence in the cohesion v. diversity debate. Directions for future research on the effects of networks on entrepreneurial outcomes are also provided.

Details

International Journal of Entrepreneurial Behavior & Research, vol. 17 no. 1
Type: Research Article
ISSN: 1355-2554

Keywords

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