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1 – 10 of over 1000Ziyuan Ma, Huajun Gong and Xinhua Wang
The purpose of this paper is to construct an event-triggered finite-time fault-tolerant formation tracking controller, which can achieve a time-varying formation control for…
Abstract
Purpose
The purpose of this paper is to construct an event-triggered finite-time fault-tolerant formation tracking controller, which can achieve a time-varying formation control for multiple unmanned aerial vehicles (UAVs) during actuator failures and external perturbations.
Design/methodology/approach
First, this study developed the formation tracking protocol for each follower using UAV formation members, defining the tracking inaccuracy of the UAV followers’ location. Subsequently, this study designed the multilayer event-triggered controller based on the backstepping method framework within finite time. Then, considering the actuator failures, and added self-adaptive thought for fault-tolerant control within finite time, the event-triggered closed-loop system is subsequently shown to be a finite-time stable system. Furthermore, the Zeno behavior is analyzed to prevent infinite triggering instances within a finite time. Finally, simulations are conducted with external disturbances and actuator failure conditions to demonstrate formation tracking controller performance.
Findings
It achieves improved performance in the presence of external disturbances and system failures. Combining limited-time adaptive control and event triggering improves system stability, increase robustness to disturbances and calculation efficiency. In addition, the designed formation tracking controller can effectively control the time-varying formation of the leader and followers to complete the task, and by adding a fixed-time observer, it can effectively compensate for external disturbances and improve formation control accuracy.
Originality/value
A formation-following controller is designed, which can handle both external disturbances and internal actuator failures during formation flight, and the proposed method can be applied to a variety of formation control scenarios and does not rely on a specific type of UAV or communication network.
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Mohamad Tannir, Grant Mills, Ilias Krystallis and Jas Kalra
This study aims to further the understanding of multi-level analysis in inter-organisational relationships by investigating the interplay of governance, cooperation and…
Abstract
Purpose
This study aims to further the understanding of multi-level analysis in inter-organisational relationships by investigating the interplay of governance, cooperation and coordination in inter-organisational projects (IOPs) on sub-system and project levels.
Design/methodology/approach
The authors use the Viable Systems Model as a framework to analyse inter-organisational project governance, cooperation and coordination by adopting a multiple-case study.
Findings
The findings illustrate how governance and coordination mechanisms exhibit a filter-down effect on lower sub-systems while cooperation influence is confined within each sub-system. While remarking the importance of specific sub-systems on the overall project performance, the interplay of governance, cooperation and coordination across sub-systems appears to be complex, with governance influencing cooperation and coordination, whereas cooperation and coordination influence each other with an incremental effect.
Originality/value
This study defines two propositions that explain how multiple levels of analysis (project and sub-systems) can support the governance of large inter-organisational projects. The authors elaborate theory on the interplay of inter-organisational project governance, cooperation and coordination.
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Sustainability is a major global concern, and research has suggested a bidirectional relationship between participatory sport events and the natural environment. Against this…
Abstract
Purpose
Sustainability is a major global concern, and research has suggested a bidirectional relationship between participatory sport events and the natural environment. Against this background, we examined the influence of runners’ environmental consciousness on their perceptions of the quality of green initiatives and their supportive intention at a running event.
Design/methodology/approach
We collected questionnaire responses from 496 runners at an event held in Taiwan, and we used partial least squares structural equation modeling for our measurement and structural models.
Findings
Our findings revealed that environmental consciousness had a positive relationship with green perceived quality, and that green perceived quality, in turn, positively affected supportive intention. Green perceived quality also mediated the relationship between environmental consciousness and supportive intention, and running frequency moderated the relationship between environmental consciousness and supportive intention.
Practical implications
Stakeholders should promote the environmental consciousness of event participants and implement sustainable initiatives to enhance participants’ supportive intention towards participatory sport events.
Originality/value
This study contributes to the literature by examining the role of environmental consciousness, green perceived quality and supportive intention in the context of a running event. The findings highlight the importance of environmental sustainability in participatory sport events and provide valuable insights for event organizers and stakeholders in designing and implementing sustainable initiatives.
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Siqi Hu, Carol Hsu and Zhongyun Zhou
Security education, training and awareness (SETA) programs are the key to addressing “people problems” in information systems (IS) security. Contrary to studies using conventional…
Abstract
Purpose
Security education, training and awareness (SETA) programs are the key to addressing “people problems” in information systems (IS) security. Contrary to studies using conventional methods, the present study leveraged an “event” lens and dimensionalized employees' perceptions into three sub-dimensions: perceived novelty, perceived disruption and perceived criticality. Moreover, this research went a step further by examining how pedagogical and communication approaches to a SETA program affect employees' perceptions of the program. This study then investigated whether – and if so, how – these approaches impact employees' perceptions of the SETA program and their subsequent commitment to it.
Design/methodology/approach
Utilizing a factorial-based scenario survey, this study empirically tested a model of the above relationships via covariance-based structural equation modeling.
Findings
The results of this research showed that pedagogical approaches were more effective than communication approaches and that employees' perceptions of the SETA program accounted for a large variance in their commitment to SETA.
Originality/value
First, this research deepens understanding of the protection of information assets by elaborating on the different approaches that organizations can take to encourage employees' commitment to SETA. Second, the study enriches the SETA literature by theorizing a SETA program as an organizational “event”, which represents a major shift from the conventional approach. Third, the study adds to the theoretical knowledge of the event lens by extending it to the SETA context and investigating the relationship among three event strength components.
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Boyu Lin, Woojin Lee and Yunseon Choe
Local events play a significant role in rebuilding relationships and increasing engagement with local communities in the postpandemic. This study aims to investigate how potential…
Abstract
Purpose
Local events play a significant role in rebuilding relationships and increasing engagement with local communities in the postpandemic. This study aims to investigate how potential attendees’ usage of local event hashtags facilitates social media engagement, further enhancing their intentions to attend local events.
Design/methodology/approach
This study adopted an exploratory sequential mixed approach. The qualitative phase used 12 semistructured in-depth interviews to explore motivations for hashtag usage and developed instruments to measure hashtag usage and social media engagement. The quantitative phase examined the relationship among motivations and behaviors of hashtag usage, social media engagement and behavioral intention through 522 online surveys.
Findings
Qualitatively, four themes manifest in hashtag users’ motivations in the context of local events: self-promoting, searching, summarizing and conforming. The quantitative findings show that these motivations influence active and passive hashtag usage differently, leading to different types of social media engagement (i.e. persistent, customized and triggered engagement). All social media engagements can significantly enhance the intention to attend local events.
Originality/value
This study divides active and passive hashtag users, conceptualizes social media engagement through hashtag usage under the affordance approach and develops instruments for these concepts. It emphasizes the importance of hashtag usage that drives social media engagement and provides insights for local event planners.
研究目的
在后疫情时期, 本地活动在重建关系和增加与当地社区的参与方面发挥着重要作用。本研究调查了潜在参与者对当地活动话题标签的使用如何促进社交媒体的参与, 进一步增强了他们参加当地活动的意愿。
研究方法
本研究采用了一种探索性的顺序混合方法。定性阶段采用了12次半结构化的深度访谈, 以探讨话题标签使用的动机, 并开发了用于测量话题标签使用和社交媒体参与的量表。定量阶段通过522份在线调查研究了动机与话题标签使用、社交媒体参与和行为意向之间的关系。
研究发现
在定性研究中, 话题标签用户的动机在当地活动背景下表现为四个主题:自我推广、搜索、总结和顺应。定量研究结果显示, 这些动机以不同方式影响主动和被动话题标签使用, 从而导致不同类型的社交媒体参与(即持续型、定制型和触发型参与)。所有社交媒体参与都能显著增强参加当地活动的意愿。
研究创新
本研究区分了主动和被动话题标签用户, 通过能力方法构想了话题标签使用下的社交媒体参与, 并为这些概念开发了测量工具。本研究强调了推动社交媒体参与的话题标签使用的重要性, 并为当地活动策划者提供了见解。
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Zeeshan Mahmood, Zlatinka N. Blaber and Majid Khan
This paper aims to investigate the role of field-configuring events (FCEs) and situational context in the institutionalisation of sustainability reporting (SR) in Pakistan.
Abstract
Purpose
This paper aims to investigate the role of field-configuring events (FCEs) and situational context in the institutionalisation of sustainability reporting (SR) in Pakistan.
Design/methodology/approach
This paper uses insights from the institutional logics perspective and qualitative research design to analyse the interplay of the institutional logics, FCEs, situational context and social actors’ agency for the institutionalisation of SR among leading corporations in Pakistan. A total of 28 semi-structured interviews were carried out and were supplemented by analysis of secondary data including reports, newspaper articles and books.
Findings
The emerging field of SR in Pakistan is shaped by societal institutions, where key social actors (regulators, enablers and reporters) were involved in the institutionalisation of SR through FCEs. FCEs provided space for agency and were intentionally designed by key social actors to promote SR in Pakistan. The situational context connected the case organisations with FCEs and field-level institutional logics that shaped their decision to initiate SR. Overall, intricate interplay of institutional logics, FCEs, situational context and social actors’ agency has contributed to the institutionalisation of SR in Pakistan. Corporate managers navigated institutional logics based on situational context and initiated SR that is aligned with corporate goals and stakeholder expectations.
Practical implications
For corporate managers, this paper highlights the role of active agency in navigating and integrating institutional logics and stakeholders’ expectations in their decision-making process. For practitioners and policymakers, this paper highlights the importance of FCEs and situational context in the emergence and institutionalisation of SR in developing countries. From a societal point of view, dominance of business actors in FCEs highlights the need for non-business actors to participate in FCEs to shape logics and practice of SR for wider societal benefits.
Social implications
From a societal point of view, dominance of business actors in FCEs highlights the need for non-business actors to participate in FCEs to shape logics and practice of SR for wider societal benefits.
Originality/value
This paper focuses on the role of FCEs and situational context as key social mechanisms for explaining the institutionalisation of SR.
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Jianyu Ma, Noel Scott and Yu Wu
Tourism destination marketers use videos that incorporate storytelling and visual and audio components to evoke emotional arousal and memorability. This study aims to examine the…
Abstract
Purpose
Tourism destination marketers use videos that incorporate storytelling and visual and audio components to evoke emotional arousal and memorability. This study aims to examine the increase in participants’ level of arousal and the degree of memorability after watching two different videos.
Design/methodology/approach
A quasi-experimental study was conducted with 45 participants who watched two destination promotional videos. One video used storytelling whereas the other used scenic images and music. The level of arousal was measured using both tonic and phasic electrodermal activity levels. The memorability of each video was measured after seven days by testing the recall accuracy.
Findings
Scenic imagery and music videos were associated with higher-than-average arousal levels, while storytelling videos generated larger-amplitude arousal peaks and a greater number of arousal-evoking events. After a week, the respondents recalled more events from the storytelling video than from the scenery and musical advertisements. This finding reveals that the treatment, storytelling and sensory stimuli in advertising moderate the impact of arousal peaks and memorability.
Originality/value
These results indicate that nonnarrative videos using only sceneries and music evoked a higher average level of arousal. However, memorability was associated with higher peak levels of arousal only in narrative storytelling. This is the first tourism study to report the effects of large arousal peaks on improved memorability in advertising.
Details
Keywords
- Arousal
- Advertising memorability
- Electrodermal activity (EDA)
- Scenery and music
- Storytelling
- Tourism destination advertising promotion
- 情绪唤醒度; 广告记忆; 皮肤电反馈(EDA); 风光与音乐类视频广告
- 故事类视频广告; 旅游目的地广告促销
- Excitación
- memorabilidad publicitaria
- actividad electrodérmica (AED)
- paisaje y música
- narración
- promoción publicitaria de destinos turísticos
Constantin Bratianu, Alexeis Garcia-Perez, Francesca Dal Mas and Denise Bedford
Imen Khanchel and Naima Lassoued
This study examines the effects of corporate governance on market returns during the first four waves of the COVID-19 crisis.
Abstract
Purpose
This study examines the effects of corporate governance on market returns during the first four waves of the COVID-19 crisis.
Design/methodology/approach
Event study and linear regression methods were applied on a sample of 293 US firms.
Findings
The results show that differences in abnormal returns are more significant during the second wave of COVID-19 and the two following waves. Moreover, estimations show that good corporate governance alleviated the effect of COVID-19 during the second wave and the two following waves. However, corporate governance did not affect abnormal returns during the first wave. Furthermore, evidence highlights that the effect of corporate governance is more observed in the industries most affected by COVID-19 than in the least affected industries.
Originality/value
Many studies have attempted to investigate the effect of corporate governance on stock returns during the first wave of the pandemic. However, to the authors' knowledge, this is the first study that focuses on different waves that occurred during 2020 and 2021.
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Erika Kalocsányiová and Ryan Essex
This study aims to compare the impact of Australian onshore and offshore immigration detention centres (IDCs) on detainees’ health and health-care events.
Abstract
Purpose
This study aims to compare the impact of Australian onshore and offshore immigration detention centres (IDCs) on detainees’ health and health-care events.
Design/methodology/approach
It uses data extracted from the Australian Government’s quarterly health reports from 2014 to 2017. These reports contain a range of data about the health and well-being of detainees, including complaints/presenting symptoms and number of appointments and hospitalisations. To compare onshore and offshore data sets, the authors calculated the rate of health events per quarter against the estimated quarterly onshore and offshore detention population. They ran a series of two-proportion z-tests for each matched quarter to calculate median z- and p-values for all quarters. These were used as an indicator as to whether the observed differences between onshore and offshore events were statistically significant.
Findings
The results suggest that adults detained onshore and offshore have substantial health needs, however, almost all rates were far higher in offshore detention, with people more likely to raise a health-related complaint, access health services and be prescribed medications, often at two to three times the rate of those onshore.
Originality/value
This paper adds to a modest body of literature that explains the health of people detained in Australian IDCs. To the best of the authors’ knowledge, this is the first paper to explore health service utilisation and a range of other variables found in the Australian Government’s quarterly health reports. These findings bolster the evidence which suggests that detention, and particularly offshore detention is particularly harmful to health.
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