Search results

The wide application of metal material extrusion (MEX) has been hampered by the practicalities associated with the resulting shrinkage of the final parts when commercial three-dimensional (3D) printing equipment is used. The shrinkage behaviour of MEX metal parts is a very important aspect of the MEX metal production process, as the parts must be accurately oversized to compensate for shrinkage. This paper aims to investigate the influence of primary 3D printing parameters, namely, print speed, layer height and print angle, on the shrinkage behaviour of MEX Steel 316L parts.

Two groups of dog-bone and rectangular-shape specimens were produced with the BASF Ultrafuse Steel 316L metal filament. The length, width and thickness of the specimens were measured pre- and post-debinding and sintering to calculate the percentile shrinkage rates. Analysis of variance (ANOVA) was used to evaluate and rank the significance of each manufacturing parameter on shrinkage. Typical main print quality issues experienced in this analysis are also reported.

The shrinkage rates of the tested specimens ranged from 15.5 to 20.4% along the length and width axis and 18.5% to 23.1% along the thickness axis of the specimens. Layer height and raster angle were the most statistically significant parameters influencing shrinkage, while print speed had very little influence. Three types of defects were observed, including surface roughness, surface deformation (warping and distortion) and balling defects.

This paper bridges an existing gap in MEX Steel 316L literature, with a focus on the relationship between MEX manufacturing parameters and subsequent shrinkage behaviour. This study provides an in-depth analysis of the relationship between manufacturing parameters – layer height, raster angle and print speed and subsequent shrinkage behaviour, thereby providing further information on the relationship between the former and the latter.

This study aims to fill a distinct gap in the literature on disability-assistance animals (disability-AAs) and inclusive employment by investigating human resource (HR) practitioners’ perceptions of disability-AAs in the staffing process and workplace. HR practitioners play a critical role in accommodation and inclusion, yet their experiences and insights have been largely ignored in prior research.

This study used a phenomenological approach, drawing on signaling theory and employability constructs, to explore insights from 17 HR practitioners’ experiences with assistance animals in the workplace.

The potential for unconscious bias in employment practices was found, as well as a significant percentage of practitioners who were unprepared to handle animal accommodations. First, the potential development of a positive stereotype bias suggests all genuine assistance animals are high functioning. Second, the assumption that employees’ assistance animal requests for invisible disabilities without previous disclosure are presumed fraudulent until proven valid.

As a qualitative study, findings from this study are not generalizable to a larger population but may be transferable to similar employment contexts.

This study extends knowledge from previous studies, which focused predominately on insights from disabled individuals, animal trainers and therapists, to the HR practitioner domain in creating a more inclusive work environment. Findings from this study suggest the need to improve education about disability-AAs and the potential for unconscious bias for HR practitioners and hiring managers when accommodating requests, particularly when those assistance animals are not described as high functioning.

The purpose of this paper is to identify the five mistakes made by political leaders in Asian countries in combating corruption. These mistakes constitute the cycle of failure which must be broken for Asian countries to succeed in fighting corruption.

This paper is based on the comparative evaluation of the effectiveness of the anti-corruption measures adopted by various Asian countries.

The cycle of failure in combating corruption in Asian countries arises from their governments’ reliance on corrupt political leaders and the police, and multiple anti-corruption agencies as attack dogs or paper tigers.

This paper would be of interest to those policymakers, anti-corruption practitioners, and scholars, who are concerned with enhancing the effectiveness of anti-corruption strategies in their countries by breaking the cycle of failure.

Dudley-Anne Thomson is the current manager of the Bay House Café, located10 kilometers from Westport, South Island, New Zealand. She rents the space from Brian Finlayson and Michael Varekam, who both started the Bay House Café eight years ago and then moved on to open restaurants in Sydney, Australia.