Search results

The purpose of this work is to optimize the monitoring of vibrations on dynamometric test rigs for railway brakes. This is a quite demanding application considering the continuous increase of performances of high-speed trains that involve higher testing specifications for brake pads and disks.

In this work, authors propose a mixed approach in which relatively simple finite element models are used to support the optimization of a diagnostic system that is used to monitor vibration levels and rotor-dynamical behavior of the machine. The model is calibrated with experimental data recorded on the same rig that must be identified and monitored. The whole process is optimized to not interfere with normal operations of the rig, using common inertial sensor and tools and are available as standard instrumentation for this kind of applications. So at the end all the calibration activities can be performed normally without interrupting the activities of the rig introducing additional costs due to system unavailability.

Proposed approach was able to identify in a very simple and fast way the vibrational behavior of the investigated rig, also giving precious information concerning the anisotropic behavior of supports and their damping. All these data are quite difficult to be found in technical literature because they are quite sensitive to assembly tolerances and to many other factors. Dynamometric test rigs are an important application widely diffused for both road and rail vehicles. Also proposed procedure can be easily extended and generalized to a wide value of machine with horizontal rotors.

Most of the studies in literature are referred to electrical motors or turbomachines operating with relatively slow transients and constant inertial properties. For investigated machines both these conditions are not verified, making the proposed application quite unusual and original with respect to current application. At the same time, there is a wide variety of special machines that are usually marginally covered by standard testing methodologies to which the proposed approach can be successfully extended.

This research aims to examine the influence of Chief Executive Officer (CEO) dark triad traits, follower COVID-19 anxiety and self-leadership on follower evaluations of the effectiveness of organizations’ response to the COVID-19 pandemic crisis.

In this paper data were collected over two time periods. At time 1, mid-October 2021, 650 participants responded to questions on their CEO’s leadership traits and self-leadership. At time 2, (3-week lag) 275 matched individual responses provided followers’ evaluations of the effectiveness of the organization’s COVID-19 response and follower self-leadership.

CEO dark triad traits had direct and indirect negative effects on followers’ evaluations of the organization’s COVID-19 response (through COVID-19 anxiety). Follower self-leadership mitigated the negative effects.

By examining the moderating role of self-leadership, we can offer organizations evidence-based strategies to mitigate some harmful effects of leaders exhibiting dark triad traits.

Given that organizations are still dealing with the ongoing ramifications of COVID-19 and planning for future crises, our findings emphasize the negative effects of dark traits on COVID-19 anxiety, and in turn, on follower’s evaluation of effective organization response to a crisis, highlighting the importance of top-level leader selection.

Our results bolster Manz’s (1986) argument that self-leadership might be key to achieving peak performance in organizations and important for follower well-being.

This study of dark traits is especially important in a crisis context to understand how leaders affect followers’ perceptions about organizational outcomes and factors that might mediate or moderate the negative impact. Despite interest in understanding leadership during a crisis, the majority of research is focused on positive traits of leaders (Palmer et al., 2020).

The purpose of this study was to explore the relationship between higher educational institution bullying policies and the subsequent cultural impact to determine the effectiveness of policy in ameliorating bullying within the university culture.

This study consisted of two separate but related case studies at two universities in different countries, focussing on university staff. The field work gathered data about existing anti-bullying policy, the extent to which it was part of the organisational culture for staff, and the levels of staff bullying experienced or seen within the organisation. Both qualitative and quantitative data were collected.

The study found that despite one university having significant policy and the other having very little policy, the knowledge of policy in both universities was and subsequent experience of bullying for staff were very similar.

The findings indicate that anti-bullying policy alone appears to have a limited impact on organisational behaviour. This suggests that the entrenched and historical master/servant relations of academia enable such practices to continue. Policy implementation is insufficient and training and development to generate more inclusive, people-focussed management cultures is necessary to ameliorate bullying behaviour.

The paper draws on the experiences, critique and suggestions of the study participants to prepare a possible agenda for cultural change that human resource (HR) managers could develop in association with academic and professional managers within their institution.

The findings suggest that in any social setting or organisational structure where strong historical patterns of master/servant endure, the opportunity for bullying behaviours to grow and flourish is fertile and that policy statements alone may have little impact on curtailing such behaviour.

This study makes two contributions to existing knowledge. First, it provides evidence that anti-bullying policy is alone unlikely to have an effective impact on instances of bullying within the culture. Second, the case study contrast displays that unacceptable levels of bullying exist in two very different institutions in two very different cultures. Whilst one country has a war-torn history and the other exists in splendid isolation, the same patterns persist, indicating that universities have structured cultural issues that are difficult to change.

The purpose of this article is to challenge the balanced budget practices of U.S. state governments and offer alternatives that may lead to better fiscal, economic and policy outcomes. We contend that the norm of balance may be leading U.S. states to make fiscal decisions that result in less-than-ideal outcomes, especially during economic downturns.

This is a normative article. We examine the scholarly evidence regarding balanced budget practices to assess the appropriateness of balanced budget norms. We also examine the fiscal rules followed by Eurozone countries to draw potential lessons for U.S. states.

We conclude that state governments should move away from strict norms of budget balance and seek more flexible approaches. We suggest that instead of following strict rules and norms of balance, U.S. states should consider implementing escape clauses, debt and deficit ceilings, and fiscal councils. We also suggest that the Federal Reserve be open to lending directly to states during fiscal crises to ensure that states have access to affordable credit.

The balanced budget norm has become ingrained in U.S. state budgeting practices, so much so that public officials and scholars alike rarely question it. The novel contribution of our article is to question this practice in a systematic way and propose alternative approaches.

The category captain system (CC) of retailer category management (RCM) is established, accepted, and widely adopted. The paper empirically assesses the application of this system in building collaborations between retailers and their suppliers to generate growth following COVID-19. This study applies service-dominant logic (S-D logic) to RCM and establishes the current ‘practical’ application of the five axioms of S-D logic within the CC system.

The researchers adopted a qualitative research design which examined both category managers and retail buyers currently involved in the CC system, using thematic analysis of transcripts from 25 practitioner participants.

The study reveals service is not a fundamental basis of exchange in the CC system. Value is uniquely, independently, and separately created by the retailer that significantly restricts the scope of the category service eco systems and the opportunity to innovate through value co-creation.

Significant change is required to realise value co-creation and innovation applying S-D logic to RCM. The study indicates there is potential to start this change by the formalisation of wider informal category relationships between non-captain suppliers and retailers through consumer insight technology, and by aligning suppliers and retailers to make more effective and sustainable trading decisions.

The study indicates that certain elements of the CC system proposed by the literature's games-based theoretic models, are not applied in practice. The lived experiences of practitioners suggest informal ways of by-passing the formal system using S-D logic.