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Article
Publication date: 9 April 2018

Wonjin Jo, O-Chang Kwon and Myoung-Woon Moon

Despite the rapid development of fused deposition modeling (FDM), the insufficient mechanical strength of the printed objects is one of the biggest stumbling blocks for practical…

1305

Abstract

Purpose

Despite the rapid development of fused deposition modeling (FDM), the insufficient mechanical strength of the printed objects is one of the biggest stumbling blocks for practical applications. Therefore, the purpose of this study is to emphasize on the importance of homogeneous heating condition and heating effect in the improvement of the mechanical strength of objects.

Design/methodology/approach

The authors first analyze the problem of the present heating system under a heating bed and chamber by using a commonly used home FDM printer. Next, they investigate the heating effect on the mechanical properties of FDM-printed objects in terms of layer thickness, heating duration and additional pressure with heating. The printed objects are treated in a mold by forced convection heating.

Findings

As the layer thickness decreases, the mechanical performance of the FDM-printed objects is remarkably enhanced by thermal heating because of the result of strong interfacial bonding among the rasters and layers. In addition, longer heating duration and higher external pressure play pivotal roles in the mechanical performance by reducing voids in the internal structure of the printed objects, leading to high densification and complete filling at the interfaces.

Originality/value

The present findings, for the first time, show that controlling uniform heat transfer is highly important for the mechanical performance of FDM three-dimensional printed objects. The authors suggest that the future developed home or personal FDM types should consider the homogeneous temperature environment during the printing process by properly heating the inside chamber. In addition, the results indicate the effectiveness of heating and pressure treatment to the objects for the reinforced mechanical performance and better surface finish.

Details

Rapid Prototyping Journal, vol. 24 no. 3
Type: Research Article
ISSN: 1355-2546

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Article
Publication date: 29 March 2021

Saif Ud Din and Vishwanath V. Baba

The purpose of this study is to explore the impact of mental health on the job performance among nurses, how shiftwork affects the impact and how social support alters it.

343

Abstract

Purpose

The purpose of this study is to explore the impact of mental health on the job performance among nurses, how shiftwork affects the impact and how social support alters it.

Design/methodology/approach

Data were collected through a questionnaire survey from 683 Indian nurses working in multiple hospitals in two major cities in Northern India. Descriptive statistics, correlations and hierarchical regressions were employed to investigate the links between job stress, emotional exhaustion and job performance along with the simultaneous moderating effects of shiftwork and social support on this relationship.

Findings

Both job stress and emotional exhaustion were negatively related to job performance. However, three-way interaction analysis revealed that social support moderated the above relationships differently between shift workers and day workers. Social support significantly altered the pattern of the relationship between the independent and dependent variables among day workers but had no impact in mitigating the relationship among shift workers.

Research limitations/implications

The findings endorsed the usefulness of the stress theory, burnout theory, the conservation of resources model and the social support resource theory in modeling the phenomenon and explaining the behavior of day workers but not that of shift workers.

Practical implications

It paved the way for evidence-based practices in health-care management.

Originality/value

This study extends theoretical predictions to India and demonstrates their global portability. It focuses on shiftwork and social support as simultaneous moderators, and through a unique three-way analysis, documents complex interaction patterns that have hitherto been unrecorded. It also brings scholarly attention to the nursing population in India whose organizational behavior is poorly documented in the empirical literature.

Details

South Asian Journal of Business Studies, vol. 11 no. 4
Type: Research Article
ISSN: 2398-628X

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Article
Publication date: 16 April 2020

Graeme McLean, Kofi Osei-Frimpong, Alan Wilson and Valentina Pitardi

By adopting a social presence theory perspective, this study aims investigate the influence of perceived usefulness of live chat services and of their unique human attributes on…

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Abstract

Purpose

By adopting a social presence theory perspective, this study aims investigate the influence of perceived usefulness of live chat services and of their unique human attributes on customer attitudes, beliefs and behaviours in the context of online travel shopping.

Design/methodology/approach

Based on a cross-sectional survey research involving 8 travel provider websites and 631 travel consumers, this work applies structural equation modelling to analyse the data.

Findings

The results illustrate that the perceived usefulness from the communication with a human live chat assistant positively influences customer attitudes and trust towards the website as well as increasing purchase intention. The findings further illustrate the role of the human social cues conveyed by live chat facilities, namely, human warmth, human assurance, human attentiveness and human customised content in positively moderating this effect.

Research limitations/implications

The study is limited to specific human attributes. Future research could investigate the role of other human characteristics as well as assess the ability of artificial intelligent powered chatbots in replicating the human elements outlined in this research.

Originality/value

The study provides a unique contribution to the travel literature by offering empirical insights and conceptual clarity into the usefulness of human operated live chat communication on travellers’ attitudes, trust towards the website and purchase intentions.

Details

International Journal of Contemporary Hospitality Management, vol. 32 no. 5
Type: Research Article
ISSN: 0959-6119

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