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Article
Publication date: 22 November 2023

Dravesh Yadav, Ravi Sastri Ayyagari and Gaurav Srivastava

This paper numerically investigates the effect of cavity radiation on the thermal response of hollow aluminium tubes and facade systems subjected to fire.

Abstract

Purpose

This paper numerically investigates the effect of cavity radiation on the thermal response of hollow aluminium tubes and facade systems subjected to fire.

Design/methodology/approach

Finite element simulations were performed using ABAQUS 6.14. The accuracy of the numerical model was established through experimental and numerical results available in the literature. The proposed numerical model was utilised to study the effect of cavity radiation on the thermal response of aluminium hollow tubes and facade system. Different scenarios were considered to assess the applicability of the commonly used lumped capacitance heat transfer model.

Findings

The effects of cavity radiation were found to be significant for non-uniform fire exposure conditions. The maximum temperature of a hollow aluminium tube with 1-sided fire exposure was found to be 86% greater when cavity radiation was considered. Further, the time to attain critical temperature under non-uniform fire exposure, as calculated from the conventional lumped heat capacity heat transfer model, was non-conservative when compared to that predicted by the proposed simulation approach considering cavity radiation. A metal temperature of 550 °C was attained about 18 min earlier than what was calculated by the lumped heat capacitance model.

Research limitations/implications

The present study will serve as a basis for the study of the effects of cavity radiation on the thermo-mechanical response of aluminium hollow tubes and facade systems. Such thermo-mechanical analyses will enable the study of the effects of cavity radiation on the failure mechanisms of facade systems.

Practical implications

Cavity radiation was found to significantly affect the thermal response of hollow aluminium tubes and façade systems. In design processes, it is essential to consider the potential consequences of non-uniform heating situations, as they can have a significant impact on the temperature of structures. It was also shown that the use of lumped heat capacity heat transfer model in cases of non-uniform fire exposure is unsuitable for the thermal analysis of such systems.

Originality/value

This is the first detailed investigation of the effects of cavity radiation on the thermal response of aluminium tubes and façade systems for different fire exposure conditions.

Details

Journal of Structural Fire Engineering, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2040-2317

Keywords

Article
Publication date: 20 March 2024

Abigail Newton, Megan Robson and Darren Johnson

Young offender mentoring programmes aim to support young people’s desistance from offending, but despite the importance, there remains limited exploration into mentor experiences…

Abstract

Purpose

Young offender mentoring programmes aim to support young people’s desistance from offending, but despite the importance, there remains limited exploration into mentor experiences of supporting the young people. This study aims to explore how a community-based mentoring intervention supports desistance in young offenders by understanding the mentor's experiences, with a specific reflective focus on facilitators and barriers to their work.

Design/methodology/approach

Semi-structured interviews were conducted with seven mentors from Northumbria Coalition against Crime, a youth and community service. Interview transcripts were analysed using interpretative phenomenological analysis, with external auditing conducted by the research supervisor.

Findings

Two superordinate themes resulted: “Factors for engagement” and “Personal experiences”, with participant disclosures reflecting professional reward and a sense of success. This was interwoven with “burnout”, emotional investment and challenges linked to barriers to effectiveness. Challenges included the young people having external negative influences, multiple individuals involved in a person’s care and the barrier of in person activities during the coronavirus pandemic. The clinical importance of mentoring programmes, implications for future working practice and research limitations are considered.

Practical implications

The clinical importance of mentoring programmes, implications for future working practice and research limitations are considered.

Originality/value

These findings contribute to understanding mentors’ experiences of working with young people in the community, offering critical insight into the mentorship and wider service dynamics. Furthermore, it provides an inaugural evaluation of the Northumbria Coalition against Crime services.

Details

Journal of Criminological Research, Policy and Practice, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2056-3841

Keywords

Article
Publication date: 11 January 2024

Xiaolong Yuan, Feng Wang, Mianlin Deng and Wendian Shi

Based on conservation of resources (COR) theory, this study aims to examine the impact of daily illegitimate tasks on employees' daily silence and daily voice behavior, as well as…

Abstract

Purpose

Based on conservation of resources (COR) theory, this study aims to examine the impact of daily illegitimate tasks on employees' daily silence and daily voice behavior, as well as the mediating role of daily ego depletion and the moderating role of trait mindfulness.

Design/methodology/approach

Through daily diary approach, 81 employees were followed for 10 consecutive workdays. Multilevel analysis was employed to examine the hypothesized relationships.

Findings

The results showed that daily illegitimate tasks are positively related to daily silence behavior and negatively related to daily voice behavior; daily ego depletion plays a mediating role in these relationships. Trait mindfulness moderates the effect of daily illegitimate tasks on daily ego depletion and the indirect effect of daily illegitimate tasks on daily silence and daily voice.

Practical implications

Managers should be mindful of minimizing the assignment of illegitimate tasks. Additionally, it is recommended that the organization provide training courses for employees to help them reduce ego depletion. Finally, organizations should focus on fostering high levels of mindfulness among their employees.

Originality/value

This study contributes to the existing literature by investigating the immediate impact of illegitimate tasks on employee voice and silence at within-person level. By doing so, it enhances comprehension of the consequences associated with illegitimate tasks. Meanwhile, this study offers additional insights into the underlying mechanisms and boundary conditions of the effect of illegitimate tasks from a resource perspective.

Details

Journal of Managerial Psychology, vol. 39 no. 1
Type: Research Article
ISSN: 0268-3946

Keywords

Article
Publication date: 26 January 2023

Sanket Dash and Garima Saini

Knowledge sharing is increasingly important in today’s information age and extant literature considers knowledge hoarding as an undesirable form of knowledge-withholding behavior…

Abstract

Purpose

Knowledge sharing is increasingly important in today’s information age and extant literature considers knowledge hoarding as an undesirable form of knowledge-withholding behavior. As knowledge hoarding is a generic, nonintentional behavior, specific attitudes and organizational processes are unlikely to curb it. Hence, the study postulates that reflection, awareness and group identification are necessary to combat innate tendencies toward knowledge hoarding. To test these hypotheses, this study aims to explore the role of mindfulness and relational systems in reducing employees’ knowledge hoarding by increasing their meaning-making through work.

Design/methodology/approach

The study results are based on a cross-sectional survey of 203 employees in India working for different organizations. Standardized scales were used for capturing data, and partial least squares structural equation modeling was used for analysis.

Findings

Mindfulness and team cohesion were positively related to an increase in meaning-making through work. Supervisor support improved perceptions of team cohesion. However, contrary to expectations, team cohesion and meaning-making through work were positively, rather than negatively, related to knowledge hoarding.

Research limitations/implications

The cross-sectional nature of the study prevents strong inference of causal relationships. Future studies may use a longitudinal design to test the relationships.

Practical implications

It highlights the role of meditation sessions and supervisory support in improving employees’ perceptions of meaning-making through work. It exhorts managers to systematically assess the impact and societal perceptions regarding knowledge hoarding rather than automatically assume a negative attitude.

Originality/value

To the best of the authors’ knowledge, this is the first study to investigate the impact of mindfulness, team cohesiveness and meaning-making through work on employees’ knowledge hoarding behaviors. The study results suggest that knowledge hoarding may be perceived positively in certain cultures. It highlights the inconsistencies in the conceptualization and operationalization of knowledge hoarding and suggests the need for better construct delineation and empirical studies related to knowledge hoarding.

Details

Journal of Knowledge Management, vol. 27 no. 9
Type: Research Article
ISSN: 1367-3270

Keywords

Article
Publication date: 19 February 2024

Neema Trivedi-Bateman and Victoria Gadd

The study aims to introduce The Compass Project (TCP), designed to determine whether strengthening morality and practicing emotion management can reduce youth antisocial attitudes…

Abstract

Purpose

The study aims to introduce The Compass Project (TCP), designed to determine whether strengthening morality and practicing emotion management can reduce youth antisocial attitudes and behaviours and increase prosocial attitudes and behaviours.The programme activities are informed by the existing evidence base and incorporate theoretical explanations of the mechanisms that link psychological moral and emotional traits and behaviour.

Design/methodology/approach

This paper will offer a description of the programme design and content, TCP 2022 pilot study and crucially, discuss the utility of delivering programmes like TCP in wider settings (schools, youth offending teams and other youth organisations). TCP is currently being delivered in UK schools as a multi-site, longitudinal, RCT design.

Findings

Participant feedback from TCP 2022 pilot study is used to illustrate the potential impact of TCP for young people in future. The authors identify five challenges faced by researchers conducting youth intervention studies: access, recruitment, continued attendance, nature of participation (enthusiasm, engagement and task-focus) and full participant completion of data measures.

Practical implications

This pioneering study offers a novel methodology to increase law-abiding moral attitudes and behaviours in young people. This paper adopts a forward-thinking and scientific approach to identify practical solutions to key challenges faced when delivering youth interventions and is relevant for youth practitioners and academics worldwide.

Social implications

TCP seeks to achieve improved youth attitudinal outcomes (such as law-aligned morality, empathy for others, measured decision-making and consideration of the consequences of action) and improved youth behavioural outcomes (such as improved quality of relationships with others, increased helping and prosocial behaviours, reduced antisocial behaviour and delinquency and reduced contact with criminal justice system-related organisations).

Originality/value

To the best of the authors’ knowledge, an evidence-based morality strengthening and emotion programme of this kind, closely aligned with a moral theory of rule-breaking, has not been developed before.

Details

Journal of Criminological Research, Policy and Practice, vol. 10 no. 1
Type: Research Article
ISSN: 2056-3841

Keywords

Article
Publication date: 27 September 2022

Mei-Yung Leung, Khursheed Ahmed and Ibukun Oluwadara Famakin

Construction professionals (CPs) are often exposed to various challenges and pressures at work including urgent deadlines, high demands, uncertainty in tasks, and complex…

Abstract

Purpose

Construction professionals (CPs) are often exposed to various challenges and pressures at work including urgent deadlines, high demands, uncertainty in tasks, and complex problems, which may induce stress and affect performance directly. Mindfulness-based stress reduction (MBSR) training has been used for several years to reduce stress among various types of people, such as nurses, teachers, and family caregivers, but its application to CPs with highly dynamic environment remains uncertain. This study aimed to investigate the impact of MBSR training on the performance of CPs via an intervention study involving two groups (MBSR and control).

Design/methodology/approach

Participants in both groups were assessed using a questionnaire survey and a semi-structured interview at the pre- and post-intervention stage. Multiple research methods were used to derive quantitative and qualitative analyses, including factor analysis, independent t-test, Pearson correlation, and contextual analysis.

Findings

The findings overall confirm that MBSR has a direct effect on CPs, improving their mindfulness characteristics and enhancing performance by reducing their stress.

Practical implications

A number of practical recommendations are made such as (1) arranging standard eight-week MBSR training for CPs; (2) giving special leave for attending the full mindfulness training; (3) establishing a suitable environment in the office for meditation;(4) allowing CPs an opportunity to pause at difficult moments to create space to respond instead of simply reacting; and (5) expressing love and kindness through gratitude, recognition, and regular feedback.

Originality/value

This research can be considered as valid evidence to convince construction organizations conducting MBSR to the CPs, which is indeed not too remote to enhance their performance as well as the holistic construction performance.

Details

Engineering, Construction and Architectural Management, vol. 31 no. 2
Type: Research Article
ISSN: 0969-9988

Keywords

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