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Article
Publication date: 1 October 2006

Nathan B. Crane, J. Wilkes, E. Sachs and Samuel M. Allen

Solid freeform fabrication processes such as three‐dimensional printing (3DP) and selective laser sintering (SLS) produce porous parts. Metal parts produced by these processes…

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Abstract

Purpose

Solid freeform fabrication processes such as three‐dimensional printing (3DP) and selective laser sintering (SLS) produce porous parts. Metal parts produced by these processes must be densified by sintering or infiltration to achieve maximum material performance. New steel infiltration methods can produce parts of standard alloy compositions with properties comparable to wrought materials. However, the infiltration process introduces dimensional errors due to both shrinkage and creep — particularly at the high temperatures required for steel infiltration. Aims to develop post‐processing method to reduce creep and shrinkage of porous metal skeletons.

Design/methodology/approach

The proposed process treats porous metal parts with a nanoparticle suspension that strengthens the bonds between particles to reduce creep and sintering shrinkage during infiltration. The process is tested by comparing the deflection and shrinkage of treated and untreated cantilevers heated to infiltration temperatures. The method is demonstrated with an iron nanoparticles suspension applied to parts made of 410 SS powder.

Findings

This process reduced creep by up to 95 percent and shrinkage by 50 percent. The best results were obtained using multiple applications of the nanoparticles dried under a magnetic field. Carbon deposited with the iron is shown to provide substantial benefit, but the iron is critical to establish strong bonds at low temperatures for minimal creep.

Research limitations/implications

This work shows that dimensional stability of porous metal skeletons during infiltration processes can be significantly improved by treatment with nanoparticles. The increased dimensional stability afforded by this technique can combine the excellent properties of homogenous infiltration with substantially improved part accuracy and open up new applications for this manufacturing technology.

Originality/value

The work shows how solid freeform fabrication processes can be improved.

Details

Rapid Prototyping Journal, vol. 12 no. 5
Type: Research Article
ISSN: 1355-2546

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Book part
Publication date: 17 January 2022

Gareth R. T. White, Robert Allen, Anthony Samuel, Dan Taylor, Robert Thomas and Paul Jones

This chapter explores social enterprises as an alternative and addition to traditional entrepreneurial ecosystems (EEs). It reviews the substantial social enterprise literature in…

Abstract

This chapter explores social enterprises as an alternative and addition to traditional entrepreneurial ecosystems (EEs). It reviews the substantial social enterprise literature in order to identify the myriad of competing tensions constraining development and success of social EEs in areas of significant poverty and economic deprivation. Following this, the findings of several contemporary and novel studies are discussed. These collectively evidence ways social enterprises are overcoming the seemingly immutable constraints they operate under. In particular, the Social Enterprise Places initiative has been highly effective in supporting the development of flourishing social EEs in many locations in the UK. However, the growth of social enterprises, both in number and economic importance, presents further challenges that social enterprise owners and managers will have to contend with. Consequently, these organisations and their allied ecosystems require continued structural, financial and skills support.

Details

Disadvantaged Entrepreneurship and the Entrepreneurial Ecosystem
Type: Book
ISBN: 978-1-80071-450-2

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Article
Publication date: 6 October 2023

Omotayo Farai, Nicole Metje, Carl Anthony, Ali Sadeghioon and David Chapman

Wireless sensor networks (WSN), as a solution for buried water pipe monitoring, face a new set of challenges compared to traditional application for above-ground infrastructure…

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Abstract

Purpose

Wireless sensor networks (WSN), as a solution for buried water pipe monitoring, face a new set of challenges compared to traditional application for above-ground infrastructure monitoring. One of the main challenges for underground WSN deployment is the limited range (less than 3 m) at which reliable wireless underground communication can be achieved using radio signal propagation through the soil. To overcome this challenge, the purpose of this paper is to investigate a new approach for wireless underground communication using acoustic signal propagation along a buried water pipe.

Design/methodology/approach

An acoustic communication system was developed based on the requirements of low cost (tens of pounds at most), low power supply capacity (in the order of 1 W-h) and miniature (centimetre scale) size for a wireless communication node. The developed system was further tested along a buried steel pipe in poorly graded SAND and a buried medium density polyethylene (MDPE) pipe in well graded SAND.

Findings

With predicted acoustic attenuation of 1.3 dB/m and 2.1 dB/m along the buried steel and MDPE pipes, respectively, reliable acoustic communication is possible up to 17 m for the buried steel pipe and 11 m for the buried MDPE pipe.

Research limitations/implications

Although an important first step, more research is needed to validate the acoustic communication system along a wider water distribution pipe network.

Originality/value

This paper shows the possibility of achieving reliable wireless underground communication along a buried water pipe (especially non-metallic material ones) using low-frequency acoustic propagation along the pipe wall.

Details

International Journal of Pervasive Computing and Communications, vol. 20 no. 2
Type: Research Article
ISSN: 1742-7371

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Book part
Publication date: 29 October 2013

Ross B. Emmett

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Article
Publication date: 26 January 2010

Kersti Nogeste

The purpose of this paper is to demonstrate how the practice of program management can be used to manage strategically‐oriented initiatives such as mergers and acquisitions (M&As)…

2544

Abstract

Purpose

The purpose of this paper is to demonstrate how the practice of program management can be used to manage strategically‐oriented initiatives such as mergers and acquisitions (M&As).

Design/methodology/approach

The methodology applied is high‐level reflective retrospective qualitative field research conducted by a practitioner‐scholar in response to the research question: How does the program management approach applied to a small‐scale acquisition compare to the current joint bodies of program management and M&A theory and practice?

Findings

The practice of program management provides a means for managing strategically oriented initiatives such as small‐scale acquisitions.

Research limitations/implications

This paper is constrained by a high‐level literature review of English language publications only, and high‐level reflective retrospective qualitative field research conducted by a single practitioner‐scholar upon a single relatively small‐scale acquisition, which cannot necessarily be scaled up to be representative of a larger‐scale acquisition, nor given the differences between M&As be used as a direct template for other M&As. Also, as a purely qualitative field research study into an area of intermediate maturity, the response to the research question lacks statistical support.

Practical implications

M&As are increasing in frequency and yet continue to have relatively high‐failure rates. Based on the findings of this paper, the practice of program management provides a means of managing strategic initiatives such as acquisitions.

Originality/value

This paper adds to the bodies of program management and M&A literature, from the dual perspectives of practice and research, particularly with reference to small acquisitions and acquisitions in the small and medium enterprise sector.

Details

International Journal of Managing Projects in Business, vol. 3 no. 1
Type: Research Article
ISSN: 1753-8378

Keywords

Abstract

Details

Further Documents from the History of Economic Thought
Type: Book
ISBN: 978-1-84950-493-5

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Case study
Publication date: 19 February 2025

Samuel Allen, Audrey J. Murrell, Ray Jones and Luka Misic

This case study draws on secondary sources, which are cited in the case and included in the “References and Other Supporting Materials” section of the teaching note, as well as a…

Abstract

Research methodology

This case study draws on secondary sources, which are cited in the case and included in the “References and Other Supporting Materials” section of the teaching note, as well as a semi-structured interview with the case’s protagonist to accurately portray the context, considerations and competing interests necessary for students to make an evidence-based recommendation about 5 Generation Bakers’ future. The case protagonist (Scott Baker) gave the author team written permission to use identifying information from the interview. As such, the authors made no attempt to disguise any names or facts pertaining to this case. As a descriptive incident, it illustrates widely used theoretical concepts and models. The case provides students the opportunity to identify theoretical concepts and practical management strategies moving forward in academic and management settings. No AI was used in writing either the case or teaching notes.

Case overview/synopsis

Scott Baker, owner of 5 Generation Bakers in McKees Rocks, PA, found himself in a difficult position in October 2015. Needing to find a new facility to expand his bakery business and meet the needs of the modern bakery industry, Scott was on his way to a meeting with officials from Cranberry Township promising a sleek, modern facility in an area with lower taxes and promising access to transportation. This tempting offer came at a cost: uprooting his loyal employees and abandoning McKees Rocks after several decades of his family operating a bakery there. On that October day, a twist emerged – the newly vacant lot of a recently closed Bottom Dollar store offered a chance to expand locally. Now, the family business owner had to decide: pursue the new facility in Cranberry, or revitalize his business and stay local. This case is widely applicable but is most directly relevant to modules related to ethics, corporate social responsibility, family business dynamics and stakeholder management analysis in management and leadership courses.

Complexity academic level

This case is most applicable to business students at the undergraduate or graduate level in entrepreneurship, business strategy, ethics, or related fields. The case is particularly relevant for modules in decision-making, corporate social responsibility, stakeholder management and family business dynamics.

Details

The CASE Journal, vol. ahead-of-print no. ahead-of-print
Type: Case Study
ISSN: 1544-9106

Keywords

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Book part
Publication date: 8 April 2015

Malcolm Rutherford

This paper is an initial attempt to discuss the American institutionalist movement as it changed and developed after 1945. Institutionalism in the inter-war period was a…

Abstract

This paper is an initial attempt to discuss the American institutionalist movement as it changed and developed after 1945. Institutionalism in the inter-war period was a relatively coherent movement held together by a set of general methodological, theoretical, and ideological commitments (Rutherford, 2011). Although institutionalism always had its critics, it came under increased attack in the 1940s, and faced challenges from Keynesian economics, a revived neoclassicism, econometrics, and from new methodological approaches derived from various versions of positivism. The institutionalist response to these criticisms, and particularly the criticism that institutionalism “lacked theory,” is to be found in a variety of attempts to redefine institutionalism in new theoretical or methodological terms. Perhaps the most important of these is to be found in Clarence Ayres’ The Theory of Economic Progress (1944), although there were many others. These developments were accompanied by a significant amount of debate, disagreement, and uncertainty over future directions. Some of this is reflected in the early history of The Association for Evolutionary Economics.

Abstract

Organizational researchers studying well-being – as well as organizations themselves – often place much of the burden on employees to manage and preserve their own well-being. Missing from this discussion is how – from a human resources management (HRM) perspective – organizations and managers can directly and positively shape the well-being of their employees. The authors use this review to paint a picture of what organizations could be like if they valued people holistically and embraced the full experience of employees’ lives to promote well-being at work. In so doing, the authors tackle five challenges that managers may have to help their employees navigate, but to date have received more limited empirical and theoretical attention from an HRM perspective: (1) recovery at work; (2) women’s health; (3) concealable stigmas; (4) caregiving; and (5) coping with socio-environmental jolts. In each section, the authors highlight how past research has treated managerial or organizational support on these topics, and pave the way for where research needs to advance from an HRM perspective. The authors conclude with ideas for tackling these issues methodologically and analytically, highlighting ways to recruit and support more vulnerable samples that are encapsulated within these topics, as well as analytic approaches to study employee experiences more holistically. In sum, this review represents a call for organizations to now – more than ever – build thriving organizations.

Details

Research in Personnel and Human Resources Management
Type: Book
ISBN: 978-1-80455-046-5

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Article
Publication date: 1 January 1935

With this number the Library Review enters on its ninth year, and we send greetings to readers at home and abroad. Though the magazine was started just about the time when the…

147

Abstract

With this number the Library Review enters on its ninth year, and we send greetings to readers at home and abroad. Though the magazine was started just about the time when the depression struck the world, its success was immediate, and we are glad to say that its circulation has increased steadily every year. This is an eminently satisfactory claim to be able to make considering the times through which we have passed.

Details

Library Review, vol. 5 no. 1
Type: Research Article
ISSN: 0024-2535

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