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Available. Open Access. Open Access
Article
Publication date: 19 June 2023

Fang Wen, Yun Bai, Xin Zhang, Yao Chen and Ninghai Li

This study aims to improve the passenger accessibility of passenger demands in the end-of-operation period.

403

Abstract

Purpose

This study aims to improve the passenger accessibility of passenger demands in the end-of-operation period.

Design/methodology/approach

A mixed integer nonlinear programming model for last train timetable optimization of the metro was proposed considering the constraints such as the maximum headway, the minimum headway and the latest end-of-operation time. The objective of the model is to maximize the number of reachable passengers in the end-of-operation period. A solution method based on a preset train service is proposed, which significantly reduces the variables of deciding train services in the original model and reformulates it into a mixed integer linear programming model.

Findings

The results of the case study of Wuhan Metro show that the solution method can obtain high-quality solutions in a shorter time; and the shorter the time interval of passenger flow data, the more obvious the advantage of solution speed; after optimization, the number of passengers reaching the destination among the passengers who need to take the last train during the end-of-operation period can be increased by 10%.

Originality/value

Existing research results only consider the passengers who take the last train. Compared with previous research, considering the overall passenger demand during the end-of-operation period can make more passengers arrive at their destination. Appropriately delaying the end-of-operation time can increase the proportion of passengers who can reach the destination in the metro network, but due to the decrease in passenger demand, postponing the end-of-operation time has a bottleneck in increasing the proportion of passengers who can reach the destination.

Available. Content available
Article
Publication date: 17 August 2012

415

Abstract

Details

Grey Systems: Theory and Application, vol. 2 no. 2
Type: Research Article
ISSN: 2043-9377

Available. Open Access. Open Access
Article
Publication date: 15 April 2019

Krystal L. Brue

For women in leadership, managing work and life obligations is essential, especially when leading in male dominated occupations such as STEM. This study examined social support…

734

Abstract

For women in leadership, managing work and life obligations is essential, especially when leading in male dominated occupations such as STEM. This study examined social support and work-family integration/blurring to determine how women in leadership perceived these dynamics. By surveying STEM women leaders, this research explored work-life strategies and support resources used by women leaders to balance their work and non-work domains and promote their roles as leaders. Women leaders indicated difficulty delineating between work and personal roles and recognized informational and emotional support as most significant to their roles as leaders. Findings also indicated that most support came from spouses/significant others, female co-workers, and mentors outside the organization, respectively. These sources provided the support needed to maintain and progress in their roles as women leaders.

Details

Journal of Leadership Education, vol. 18 no. 2
Type: Research Article
ISSN: 1552-9045

Available. Open Access. Open Access
Article
Publication date: 15 October 2018

Krystal L. Brue

Women leaders operate within multiple roles, managing both work and nonwork obligations. Exploring work-life balance constructs, this study examined role integration, social…

831

Abstract

Women leaders operate within multiple roles, managing both work and nonwork obligations. Exploring work-life balance constructs, this study examined role integration, social support sources, and work-family conflict to determine their influence on women leaders. Findings suggested that women leaders felt the benefit of a variety of social support services, but especially from sources external to the organization. Women leaders were diverse in role integration strategies, with respondents largely divided between blurring and segregating their work and nonwork roles. Time-based work-family conflict was slightly more apparent than strain-based conflict. Women leaders also indicated that their work interfered with their family more than their family interfered with their work. Findings provide valuable insights as to how women view work-life balance within their roles as leaders.

Details

Journal of Leadership Education, vol. 17 no. 4
Type: Research Article
ISSN: 1552-9045

Available. Content available
Article
Publication date: 11 February 2014

119

Abstract

Available. Open Access. Open Access
Article
Publication date: 22 August 2023

Rose Luke and Joash Mageto

The belt and road initiative (BRI) emanates from China and seeks to connect Europe, Asia and Africa through transport and telecommunications infrastructure. Despite the importance…

1883

Abstract

Purpose

The belt and road initiative (BRI) emanates from China and seeks to connect Europe, Asia and Africa through transport and telecommunications infrastructure. Despite the importance of Africa in the BRI network, very little research has been done on the BRI in Africa, and even less of this emanates from Africa itself. In particular, considering that the BRI investments in Africa are largely transport related, there is almost no research covering the area of logistics, which should be greatly affected by the infrastructure investments. This paper sought to establish the current state of logistics research related to the BRI in Africa.

Design/methodology/approach

A bibliometric analysis was conducted on documents extracted from the SCOPUS database.

Findings

The findings indicate that there is a lack of research in critical areas such as environmental, social and economic impact of BRI transport investments, governance, logistics performance and international cooperation. In particular, there is a massive gap in local knowledge regarding the BRI.

Research limitations/implications

The study is limited to published research indexed in the SCOPUS database. Future research directions include empirical studies into BRI project initiation investigation, economic and environmental impacts, governance structures and policy intervention requirements and macro-level logistics impacts.

Practical implications

The study emphasises the importance publishing all the relevant information regarding BRI related projects in Africa to create transparency.

Originality/value

The study investigates the current research on the effect of China's BRI on transport and logistics in Africa through a bibliometric analysis. The investigation reveals that while there are huge investments in infrastructure, the actual effect on logistics of participating countries in Africa has not been interrogated.

Details

Journal of International Logistics and Trade, vol. 21 no. 4
Type: Research Article
ISSN: 1738-2122

Keywords

Available. Open Access. Open Access
Article
Publication date: 3 August 2022

Mariem Khalifa and Samir Trabelsi

The purpose of this paper is to examine whether managers of bankrupt firms are more or less conditionally conservative in their financial reporting relative to non-bankrupt firms…

1024

Abstract

Purpose

The purpose of this paper is to examine whether managers of bankrupt firms are more or less conditionally conservative in their financial reporting relative to non-bankrupt firms. The study further examines the cross-sectional differences in conditional conservatism among bankrupt and non-bankrupt firms.

Design/methodology/approach

The study employs a sample of US firms to investigate conditional conservatism in firms that experience financial distress and go bankrupt relative to non-stressed non-bankrupt firms. The study also uses switching regression models to identify the drivers of the cross-sectional difference in conditional conservatism among bankrupt and non-bankrupt firms.

Findings

Empirical results show that bankrupt firms are timelier in recognizing bad news than good news when compared to non-bankrupt firms. The higher level of conditional conservatism in bankrupt firms is mainly driven by their higher levels of leverage and tax-reduction incentives. The cross-sectional analyses show that these results largely hold for more leveraged firms and firms with higher tax costs. Taken together, these results suggest that the conservative tendency of managers of bankrupt firms can stem from the agency problem between lenders and managers and from tax-decreasing motivations.

Originality/value

The novelty of the authors’ research stands in studying the drivers of the cross-sectional differences in conditional conservatism between bankrupt and non-bankrupt firms and specifically, the demonstration that taxation also induces conditional conservatism in the setting of ex post bankrupt firms.

Details

China Accounting and Finance Review, vol. 25 no. 1
Type: Research Article
ISSN: 1029-807X

Keywords

Available. Open Access. Open Access
Article
Publication date: 2 October 2024

Zehui Zhang, Qian Huang, Lewen Li, Dan Li, Xueping Luo and Xiaohong Zeng

The purpose of this study is to address the deficiency in safety monitoring technology for 27.5 kV high-voltage cables within the railway traction power supply by analyzing the…

96

Abstract

Purpose

The purpose of this study is to address the deficiency in safety monitoring technology for 27.5 kV high-voltage cables within the railway traction power supply by analyzing the grounding methods employed in high-speed railways and developing an effective monitoring solution.

Design/methodology/approach

Through establishing a mathematical model of induced potential in the cable sheath and analyzing its influencing factors, the principle of grounding current monitoring is proposed. Furthermore, the accuracy of data collection and alarm function of the monitoring equipment were verified through laboratory simulation experiments. Finally, through practical application in the traction substation of the railway bureau on site, a large amount of data were collected to verify the stability and reliability of the monitoring system in actual environments.

Findings

The experimental results show that the designed monitoring system can effectively monitor the grounding current of high-voltage cables and respond promptly to changes in cable insulation status. The system performs excellently in terms of data collection accuracy, real-time performance and reliability of alarm functions. In addition, the on-site trial results further confirm the accuracy and reliability of the monitoring system in practical applications, providing strong technical support for the safe operation of high-speed railway traction power supply systems.

Originality/value

This study innovatively develops a 27.5kV high-voltage cable grounding current monitoring system, which provides a new technical means for evaluating the insulation status of cables by accurately measuring the grounding current. The design, experimental verification and application of this system in high-speed railway traction power supply systems have demonstrated significant academic value and practical significance, contributing innovative solutions to the field of railway power supply safety monitoring.

Details

Railway Sciences, vol. 3 no. 5
Type: Research Article
ISSN: 2755-0907

Keywords

Available. Content available
Article
Publication date: 27 December 2022

Diego Matricano and Elena Candelo

The present paper aims to explore if innovation strategies and crowdfunding campaigns can be cross-referred or even matched. These alternatives could increase the efficiency of…

168

Abstract

Purpose

The present paper aims to explore if innovation strategies and crowdfunding campaigns can be cross-referred or even matched. These alternatives could increase the efficiency of crowdfunding processes since seeking new projects/business ideas to finance could be more targeted.

Design/methodology/approach

This paper is theoretical and explorative. Two dedicated literature reviews are carried out. The former is focused on innovation strategies and the latter is focused on crowdfunding campaigns. The offering of research propositions is the result of an inductive process.

Findings

Two main findings are achieved: first, a possible match between innovation strategies and crowdfunding campaigns (expressed by four research propositions); second, the confirmation of the role of innovation studies to corroborate the relevance of crowdfunding as an attractive field of research.

Originality/value

Previous contributions, expressly concerning the relationship between innovation strategies and crowdfunding campaigns, have mainly focused on the influence/support that crowdfunding campaigns offer to innovation strategies, by supporting or fostering them. Possible matches between innovation strategies and crowdfunding campaigns have rarely been investigated.

Details

European Journal of Innovation Management, vol. 27 no. 7
Type: Research Article
ISSN: 1460-1060

Keywords

Available. Open Access. Open Access
Article
Publication date: 9 January 2025

Satabdee Dash, Axel Nordin and Glenn Johansson

Dual design for additive manufacturing (DfAM) takes into account both the opportunities and constraints of AM simultaneously, which research shows is more effective than…

102

Abstract

Purpose

Dual design for additive manufacturing (DfAM) takes into account both the opportunities and constraints of AM simultaneously, which research shows is more effective than considering them separately. Unlike existing reviews, this paper aims to map DfAM research within the engineering design process, focusing solely on studies adopting dual DfAM. Additionally, it aims to suggest future research directions by analysing prominent research themes and their inter-relationships. Special emphasis is on theme inter-relationships concerning the conceptual, embodiment and detail design phases.

Design/methodology/approach

The study is based on a systematic literature review of 148 publications from January 2000 to February 2024. After screening, prominent research themes were identified and systematically analysed. Theme inter-relationships were explored using quantitative analysis and chord diagrams.

Findings

The findings reveal that studies either span the entire design process, the early design phases or the later design phases. Most research focuses on the later design phases, particularly within themes of design optimisation, design evaluation and AM-specific manufacturing constraints. The most frequent theme inter-relationship occurs between design optimisation and AM-specific manufacturing constraints. Overall, the findings suggest future research directions to advance dual DfAM research, such as development of design rules and guidelines for cellular structures.

Originality/value

This review proposes a model by mapping prominent themes of dual DfAM research in relation to the engineering design process. Another original contribution lies in analysing theme inter-relationships and visualising them using chord diagrams – a novel approach that did not exist before.

Details

Rapid Prototyping Journal, vol. 31 no. 11
Type: Research Article
ISSN: 1355-2546

Keywords

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