Manuel Sardinha, Luís Ferreira, Hermínio Diogo, Tânia R.P. Ramos, Luís Reis and M. Fátima Vaz
This study aims to investigate the tensile strength and compressive behaviour of two thermoplastic polyurethane (TPU) filaments produced via material extrusion (ME): TPU 95A and…
Abstract
Purpose
This study aims to investigate the tensile strength and compressive behaviour of two thermoplastic polyurethane (TPU) filaments produced via material extrusion (ME): TPU 95A and Reciflex (recycled).
Design/methodology/approach
Tensile strength and compressive behaviour are assessed. The influence of extrusion temperature and infill pattern on these properties is examined, supported by thermal characterization, surface morphology analyses and a comprehensive comparison with existing literature. An analytical method is presented for estimating the solid ratio of ME parts, using an ellipse model to describe the material bead geometry.
Findings
Reciflex is generally stiffer than TPU 95A in both tensile and compressive tests. Specimens loaded orthogonally in compression tests exhibited stiffer behaviour than those loaded parallelly, and higher tensile properties were typically observed when material beads were deposited parallel to the load direction. Unlike TPU 95A, Reciflex is sensitive to extrusion temperature variations.
Social implications
By comparing recycled and virgin TPU filaments, this research addresses waste management concerns and advocates for environmentally sustainable production practices in the broadly used filament/based ME technique.
Originality/value
This study provides an extensive comparison of computed values with existing literature, offering insights into how different materials may behave under similar processing conditions. Given ongoing challenges in controlling melt flow during extrusion, these results may offer insights for optimizing the production of ME parts made with thermoplastic elastomers.
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Guilherme Duarte, Ana M.A. Neves and António Ramos Silva
The goal of this work is to create a computational finite element model to perform thermoelastic stress analysis (TSA) with the usage of a non-ideal load frequency, containing the…
Abstract
Purpose
The goal of this work is to create a computational finite element model to perform thermoelastic stress analysis (TSA) with the usage of a non-ideal load frequency, containing the effects of the material thermal properties.
Design/methodology/approach
Throughout this document, the methodology of the model is presented first, followed by the procedure and results. The last part is reserved to results, discussion and conclusions.
Findings
This work had the main goal to create a model to perform TSA with the usage of non-ideal loading frequencies, considering the materials’ thermal properties. Loading frequencies out of the ideal range were applied and the model showed capable of good results. The created model reproduced acceptably the TSA, with the desired conditions.
Originality/value
This work creates a model to perform TSA with the usage of non-ideal loading frequencies, considering the materials’ thermal properties.
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Igor A. Rodrigues Lopes, Carolina Furtado, Sérgio Pereira and André Furtado
Shóna O’Donnell, Aishling O’Reilly, Katie Robinson, Eimer Ní Riain and Judith Pettigrew
Higher levels of participation in school are linked to greater academic performance, better health and well-being and positive long-term outcomes for young people. Evidence shows…
Abstract
Purpose
Higher levels of participation in school are linked to greater academic performance, better health and well-being and positive long-term outcomes for young people. Evidence shows that for students with emotional and behavioural difficulties (EBD), participation in school-based occupations is often restricted in comparison to their peers. Given the recent advancements towards introducing a new model of school-based occupational therapy in Ireland, this paper aims to discuss how occupational therapy can support students with EBD to increase their participation within the post-primary school context. The opinions in this paper are derived from the authors’ experience in the development of this practice in the Republic of Ireland.
Design/methodology/approach
The authors reviewed current literature and reflected on current practice to describe the unique role of occupational therapy in supporting students with EBD in the school environment.
Findings
Occupational therapists have potential to play a key role in school-based support for students with EBD. The authors describe how occupational therapists can promote whole school understanding of EBD and enable skill development, self-regulation, participation and school belonging, among youths with EBD. There is a significant lack of literature guiding practice in this area. Further research is required to explore professional issues and identify best practice.
Originality/value
This paper aims to provoke consideration of how school-based occupational therapists can play a crucial role in supporting students with EBD who are otherwise at risk of occupational injustice.
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Sabrina Silva Valadares, Antonio Moreira De Carvalho Neto, Carolina Mota Mota-Santos and Daniela Martins Diniz
The core of this study is women in mining. The aim of this study was to analyze the perception of women, about their work environment, their career, the human resources policies…
Abstract
Purpose
The core of this study is women in mining. The aim of this study was to analyze the perception of women, about their work environment, their career, the human resources policies and practices and the work–family balance in the context of a multinational organization in the sector.
Design/methodology/approach
The case study was carried through semi-structured interviews with 27 women who work in this organization.
Findings
Although women report that they are capable of exercising any position/function in the company, they perceive wage gap in the investigated organization; that maternity leave and the fact of having children impact their career and their rise to higher positions in the organizational hierarchy negatively; situations of prejudice and discrimination experienced at work. Sometimes subtly, sometimes not so subtly, but they still constitute barriers faced by women in mining.
Originality/value
Although the debate around the issue of gender inequality in organizations is not recent, little has been produced about the working condition of women in occupational fields where male domination is strong, such as mining.
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Nicholas Asare, Margaret Momo Laryea, Joseph Mensah Onumah and Michael Effah Asamoah
This study examines the causal relationship between intellectual capital and asset quality of banks in Ghana.
Abstract
Purpose
This study examines the causal relationship between intellectual capital and asset quality of banks in Ghana.
Design/methodology/approach
Using annual data extracted from audited financial statements of 24 banks from 2006 to 2015, a ratio of non-performing loans to gross loans and advances is employed to estimate asset quality growths while the value-added intellectual coefficient by Pulic (2008, 2004) measures intellectual capital. The panel-corrected standard errors estimation technique is used to estimate panel regressions with asset quality as the dependent variable.
Findings
Asset quality of banks in Ghana is generally not affected by intellectual capital. However, when intellectual capital is divided into its components, the study indicates that there are significant positive relationships between asset quality and two components of intellectual capital. Thus, structural capital and human capital efficiencies positively affect the asset quality of banks.
Practical implications
The findings of the study implore managements of banks to increase structural and human capital investments and efficiencies to improve asset quality. Furthermore, the results have direct implications on developments in financial markets in emerging economies.
Originality/value
The study analyses the link between typical intellectual capital and asset quality of banks which is yet to be empirically examined in an emerging banking market.