Jason B. Jones, David I. Wimpenny and Greg J Gibbons
This paper aims to investigate the effects on material properties of layer-by-layer application of pressure during fabrication of polymeric parts by additive manufacturing (AM)…
Abstract
Purpose
This paper aims to investigate the effects on material properties of layer-by-layer application of pressure during fabrication of polymeric parts by additive manufacturing (AM). Although AM, also known popularly as 3D printing, has set a new standard for ease of use and minimal restraint on geometric complexity, the mechanical part properties do not generally compare with conventional manufacturing processes. Contrary to other types of polymer processing, AM systems do not normally use (in-process) pressure during part consolidation.
Design/methodology/approach
Tensile specimens were produced in Somos 201 using conventional laser sintering (LS) and selective laser printing (SLP) – a process under development in the UK, which incorporates the use of pressure to assist layer consolidation.
Findings
Mechanical testing demonstrated the potential to additively manufacture parts with significantly improved microstructure and mechanical properties which match or exceed conventional processing. For example, the average elongation at break and ultimate tensile strength of a conventionally laser-sintered thermoplastic elastomer (Somos 201) increased from 136 ± 28 per cent and 4.9 ± 0.4 MPa, to 513 ± 35 per cent and 10.4 ± 0.4 MPa, respectively, when each layer was fused with in-process application of pressure (126 ± 9 kPa) by SLP.
Research limitations/implications
These results are based on relatively small sample size, but despite this, the trends observed are of significant importance to the elimination of voids and porosity in polymeric parts.
Practical implications
Layerwise application of pressure should be investigated further for defect elimination in AM.
Originality/value
This is the first study on the effects of layerwise application of pressure in combination with area-wide fusing.
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Victoria Marshall and Chris Goddard
In this chapter, the authors focus on a range of Australian news articles selected for their relevance to key themes in the area of child abuse and examine two high profile cases…
Abstract
In this chapter, the authors focus on a range of Australian news articles selected for their relevance to key themes in the area of child abuse and examine two high profile cases of child abuse deaths that were extensively reported on by the media and led to system reform. Challenges for media reporting on child abuse in Australia including a changing media landscape, lack of available child abuse data and lack of publicly available serious case reviews are discussed. The authors argue that there is a need for attention to be paid to children's resistance and agency in the context of violence and abuse to counter the objectification of children and uphold their rights. Following Finkelhor (2008), the authors argue that media reporting on child abuse in Australia reflects a general approach to child abuse that is fragmented, with different types of abuse viewed as separate from one another, and call for a more integrated understanding of child abuse. The authors highlight the complexity of media responses to child abuse in Australia, noting that while the social problem of child abuse can be misrepresented by the media, media reporting has also triggered significant systemic reform and advocated for children in cases where other systems failed them.
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Social movements are sites of knowledge production. Green criminologists are interested in activism both as an informal response to environmental harms/crimes and in their…
Abstract
Social movements are sites of knowledge production. Green criminologists are interested in activism both as an informal response to environmental harms/crimes and in their explorations of the possibility of activist green criminology. In this chapter, the author calls attention to a related issue – the significance of knowledge produced in social movements. Drawing on her study of the resistance movements against hydropower in Turkey, the author discusses how movement knowledge can contribute to green criminology in relation to the (i) complexity of harm and victimisation; (ii) politics of knowledge in identifying harm; and (iii) limits of formal processes in preventing harm. The author concludes by highlighting the importance of recognising activists as subjects who produce knowledge, in academic engagement with activism.
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Leanne Weber, Jarrett Blaustein, Kathryn Benier, Rebecca Wickes and Diana Johns
While the steep increases in rates of incarceration seen in the United States in the late twentieth century have begun to level out, one form of incarceration has seen more…
Abstract
While the steep increases in rates of incarceration seen in the United States in the late twentieth century have begun to level out, one form of incarceration has seen more drastic reductions in rates of use in the 2010s: long-term solitary confinement. Across the United States, prisons that once isolated prisoners for decades at a time stand hauntingly empty. The solitary confinement reform movement provides an important lens for examining what happens when an entrenched punitive practice faces widespread and sustained criticism and reveals the multiple paradigms through which reform operates – through politics, litigation, or charismatic leadership.
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Purpose: This chapter applies and integrates theories of status and stigma to better understand the mechanisms that drive the combined effects of the status of race and the stigma…
Abstract
Purpose: This chapter applies and integrates theories of status and stigma to better understand the mechanisms that drive the combined effects of the status of race and the stigma of criminal record in the context of the labor market. Using these social psychological theories of status and stigma, I propose and test two potential mechanisms – moral expectations and performance expectations – that might explain the compound or “double disadvantage” observed among Black job seekers with a criminal record. Within this synthetic application, I also seek to bridge and extend the literatures on status and stigma processes.
Methodology/Approach: To examine the relationship between race and criminal record and the potential mediating role of moral and performance expectations, I use a laboratory experiment consisting of a hiring scenario where participants evaluate mock, but ostensibly real job applicants who vary on the characteristics of interest. Participant evaluations consist of rankings along a series moral and performance-related scales as well as a set of workplace outcomes.
Findings: Findings suggest that race and criminal record aggregate to intensify disadvantage, with Black applicants who have a criminal record faring worse than other applicants on each workplace outcome. Results also support moral expectations, but not performance expectations, as a key mechanism driving this status-stigma intensification process.
Implications: This study has important implications for studies of race, crime, and employment as well as for theories of status and stigma. Future research should attend more closely to the role of perceived morality both in substantive work on race and criminal record and in bridging work on status and stigma processes. Pinpointing moral expectations as a mechanism of bias related to race and criminal record also opens new avenues for targeted intervention efforts.
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Chiara Luisa Cantù, Daniel Schepis, Roberto Minunno and Greg Morrison
This paper aims to investigate the role of relational governance in innovation platform development, specifically investigating the context of living labs.
Abstract
Purpose
This paper aims to investigate the role of relational governance in innovation platform development, specifically investigating the context of living labs.
Design/methodology/approach
Two longitudinal case studies are presented, derived from auto-ethnographic narratives, qualitative interviews and secondary documents, which cover the critical stages in the development of each living lab.
Findings
Empirical insights demonstrate the relevance of coordination activities based on joint planning and activities to support innovation platform development across different stages. The governance role of research actors as platform activators is also identified.
Practical implications
The paper offers a useful perspective for identifying collective goals between living lab actors and aligning joint activities across different stages of living lab development.
Social implications
The case provides insights into the challenges and opportunities for collaboration between academia, industry and users to support sustainable construction innovation.
Originality/value
A relational governance mode is identified, going beyond top down or bottom up approaches, which contributes a new understanding of how collective goals align within a relational space.
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Julie Stubbs, Sophie Russell, Eileen Baldry, David Brown, Chris Cunneen and Melanie Schwartz
Entrepreneurial profits flow from differences in expectations between buyers and sellers regarding the future value of resources. This article investigates whether differences in…
Abstract
Entrepreneurial profits flow from differences in expectations between buyers and sellers regarding the future value of resources. This article investigates whether differences in expectations can be influenced by an entrepreneur to produce greater profits. It is argued that there are several points in the entrepreneurial process where such interventions can occur and that the use of these techniques should be associated with superior wealth creation. The article also explores the ethical implications of influencing stakeholders in this way.
Murder is overwhelmingly a male affair (UNODC Global Study on Homicide, 2019). So, when women kill, their crimes gain a lot of attention and even more hysteria in both courts and…
Abstract
Murder is overwhelmingly a male affair (UNODC Global Study on Homicide, 2019). So, when women kill, their crimes gain a lot of attention and even more hysteria in both courts and media. This chapter will analyse the cases of Sally Challen, Belinda van Krevel and Maxine Carr to show that portrayals of women who are involved in killing exist on a continuum, from abused victims to those simply ‘born evil’ to the incomprehension of those whose crimes render them outside society altogether; or in simple terms, from sad, to bad, to mad. In all cases, the agency of the women is presented as incomplete or impossible, indicating our inability in heteropatriarchy to acknowledge that women are as capable as men of exhibiting the full spectrum of human behaviour. Denying agency, particularly to violent women, allows Western societies to avoid having to face and thus, attempt to understand, the female capacity for aggression.