Effects of carbon content and grain orientation on the crack growth behaviour in magnesia-carbon refractory bricks

Effects of carbon content and loading direction/grain orientation on the crack growth resistance of MgO-C refractories were examined via evaluating R-curve, critical stress intensity factor and bridging stress derived from the results of three point bending testing on single edged notched beam samples. The results indicated that crack growth resistance, critical stress intensity factor and bridging stress all increased with increasing the carbon content in the refractories, and were greater in the loading direction horizontal to than perpendicular to the sample pressing direction. Nevertheless, the stress intensity factor at crack initiation was similar in all cases of samples containing different levels of carbon. Based on these, it can be concluded that an MgO-C refractory with a higher carbon content would have better resistance against crack propagation after initiation, but would not show obvious improvement in its resistance against crack initiation

Workplace cyberbullying: The antecedents and consequences research-in-progress

Due to its negative consequences on targets, witnesses and organization itself, workplace cyberbullying has captured lots of media attention and triggered many discussions among practitioners. The overriding purpose of this paper is to examine cyberbullying behaviors in the workplace. More specifically, neutralization theory and rational choice theory of corporate crime are used as the theoretical foundation to build a model of antecedents of workplace cyberbullying. In addition, the negative impacts of workplace cyberbullying on victims and witnesses are also measured and discussed in our study

Knowledge science, engineering and management: 8th international conference, ksem 2015 Chongqing, China, october 28-30, 2015 proceedings

Knowledge science, engineering and management: 8th international conference, ksem 2015 Chongqing, China, october 28-30, 2015 proceeding

Have we found a solution for health misinformation? A ten-year systematic review of health misinformation literature 2013-2022

Background Health misinformation (HM) has emerged as a prominent social issue in recent years, driven by declining public trust, popularisation of digital media platforms and escalating public health crisis. Since the Covid-19 pandemic, HM has raised critical concerns due to its significant impacts on both individuals and society as a whole. A comprehensive understanding of HM and HM-related studies would be instrumental in identifying possible solutions to address HM and the associated challenges. Methods Following the PRISMA procedure, 11,739 papers published from January 2013 to December 2022 were retrieved from five electronic databases, and 813 papers matching the inclusion criteria were retained for further analysis. This article critically reviewed HM-related studies, detailing the factors facilitating HM creation and dissemination, negative impacts of HM, solutions to HM, and research methods employed in those studies. Results A growing number of studies have focused on HM since 2013. Results of this study highlight that trust plays a significant while latent role in the circuits of HM, facilitating the creation and dissemination of HM, exacerbating the negative impacts of HM and amplifying the difficulty in addressing HM. Conclusion For health authorities and governmental institutions, it is essential to systematically build public trust in order to reduce the probability of individuals acceptation of HM and to improve the effectiveness of misinformation correction. Future studies should pay more attention to the role of trust in how to address HM. Have we found a solution for health misinformation? A ten-year systematic review of health misinformation literature 2013–2022.</p

Earing prediction with a stress invariant-based anisotropic yield function under non-associated flow rule

In this work, a recently proposed anisotropic Drucker function is implemented with non-associated flow rule (non-AFR) to predict the earing profile during cup drawing. The finite element formulation under non-AFR is developed for the precise simulation of the deep drawing process with a strong anisotropic aluminum alloy of AA2090-T3. The comparison between the simulation and experimental results reveals that the earing profile numerically predicted by the anisotropic Drucker function under non-AFR is in good agreement with the measured profile from experiments. It’s also reveal that the improvement of accuracy of prediction for r-values does not always mean the synchronously improvement in prediction the earing profile for strong anisotropic phenomena of deep drawing for AA2090-T3. The computation efficiency of the anisotropic Drucker function is also investigated and compared with the Yld2004-18p function, which shows that 40% reduction of computational cost can be reached. The influence of different shapes of yield and potential on earing prediction is also investigated by combining the anisotropic Drucker function and Yld2004-18p function under non-AFR, which demonstrates that a proper shape of plastic potential is very important to predict the small ear around 0º for AA2090-T3. It also proves that both the yield and plastic potential functions strongly influence the height and earing profile in the simulation of cup deep drawing. It’s also should be mentioned that the r-value does not keep constant in the simulation in the uniaxial tension of a single cubic element, but varies with the increase of plastic deformation in directional uniaxial tension, which may raise the difficulty for accurately prediction in metal forming

Bioinspired fabrics with single fiber as ultra-sensitive acoustic sensor

Sensing audible signals with wearable fabrics remains a challenge due to the hierarchical, interface-induced sound dissipation and low transduction efficiency of fiber components. Recent exciting progress published in Nature employs single piezoelectric fibers woven into high-modulus fabrics and demonstrates an ultra-sensitive microphone, which may pave a promising way for wearable, audio-sensing fabrics

Small Actions Can Make a Big Difference: Voluntary Employee Green Behaviour at Work and Affective Commitment to the Organization

In the workplace, discretionary pro-environmental actions made by employees are referred to as voluntary employee green behaviour (VEGB). This is increasingly recognised as a contribution to both the environmental and the financial sustainability of the organisation. However, the implications of VEGB beyond its original environmental domain largely remain underspecified, thus constraining the theoretical development of the field and advocacy for organisations in practice. This study thus investigates how VEGB associates with the employee outcome of affective commitment, which especially impacts the psychological relationships that employees develop with their organisations. Drawing on two studies, we found that VEGB was positively associated with affective commitment, as enabled by three mediating mechanisms that enhanced the sense of warm glow and moral credit for employees while protecting them against emotional exhaustion. Moreover, we found that perceived organisational support for the environment served as a boundary condition for VEGB and its mediation by moral credit and emotional exhaustion. Implications for theory and practice are discussed in the paper

Factors influencing workplace accident costs of building projects

Workplace accidents would incur various losses to the injured workers and their families, employers and society. This study aims to investigate the magnitude of workplace accident costs to building contractors and identify factors influencing workplace accident costs of building projects. Data were collected using multiple techniques (structured interviews, archival records and questionnaires) from 47 completed building projects in Singapore. Data were analyzed using bivariate correlation analysis and moderated regression analysis. It is found that the average direct accident costs, indirect accident costs and total accident costs of building projects account for 0.165%, 0.086% and 0.25% of contract sum, respectively. It is concluded that workplace accident costs of building projects are influenced by accident rates, project hazard level, project size, company size and the involvement of sub-contractors. The findings of this study may enhance decision makers' understanding of financial implications of workplace accidents in their building projects and motivate them to undertake accident prevention initiatives voluntarily

Why people accept mental health-related misinformation: role of social media metrics in users’ information processing

Drawing on dual-process theories, this study aims to investigate the factors associated with social media users’ acceptance of mental health-related misinformation (MHRM). We conducted a case study of Chinese microblogging Weibo on conversations that emerged following a publicised celebrity suicide of South Korean superstar Sulli. This incident sparked an extensive discussion on mental health issues as Sulli was reported having suffered from depression prior her death. Whilst previous studies on users’ information acceptance mainly adopted survey methods, our study employs a mix-methods approach (i.e., computational data collection method, content analysis and statistical analysis), which opens up new directions to utilise secondary social media data. We identified MHRM from the discussions on Weibo and labelled the responses to the misinformation as whether they indicate an acceptance of the MHRM. Binary logistic regression was used to examine the associations of receivers’ acceptance of MHRM with its information features (e.g., number of likes) and information sources (e.g., gender). Inconsistent with previous studies, our findings suggest that MHRM is less likely to be accepted when published by male users, underscoring the context-specific nature of heuristic cues. This study also revealed some novel findings, such as MHRM with more pictures or with more words is less likely to be accepted. A theoretical model was proposed based on the findings, which highlights the importance of heuristic cues and individuals’ pre-existing knowledge in information processing. </p

Guest editorial

Guest editoria