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The paper aims to propose a stability analysis method based on region-of-attraction (ROA) overlapping to evaluate the flight stability of the possible sudden damage process and guarantee flight safety in extreme cases.

First, according to the two flight conditions before and after damage which the aircraft may encounter, flight dynamical models are built and fitted by polynomial equation for subsequent ROA analysis. And then, the ROA overlapping estimation method based on V-s iteration is presented to complete the stability analysis of such airplane sudden damage process.

Finally, in the presence of control surface damage, case aircraft flight stability is analyzed and simulated to verify the effectiveness of the proposed method.

The proposed method can be used for stability check during the aircraft control law design, or for further completing the design of the emergency stable controller design.

Compared with previous studies on sudden damage process of aircraft, to the best of the authors’ knowledge, this is one of the pioneer studies in which the ROA and ROA overlapping concept has been introduced. This study on stability analysis of aircraft sudden damage process could further develop the theory of emergency stable control.

This study aims to investigate the dynamic interplay between the management control system (MCS) and organizational identity (OI) in the Deepwater Horizon incident involving British Petroleum (BP). It examines how the MCS manages challenges, particularly those addressing the embarrassment stemming from identity disparities between external portrayal (frontstage) and internal operations (backstage), with a focus on the often-underestimated influence of the media.

This study builds upon the frameworks developed by Ravasi and Schultz (2006) and Malmi and Brown (2008) to construct a theoretical framework that profoundly investigates the relationship between MCS and OI. The framework developed guided the research design and incorporated a qualitative approach complemented by an illustrative case study. The research data was rigorously gathered from diverse sources, including official BP documents and influential media outlets, with a particular focus on well-established American and British newspapers.

BP’s MCS plays a dual role: it exposes discrepancies in safety, leadership and values, causing embarrassment and identity damage, yet catalyses a sense-making process leading to organizational transformation and shifts in the OI. This transformation influences sense-giving and prompts changes in MCS. The study reveals an intricate interplay in identity management between frontstage audiences (e.g. influential media) and backstage actors (e.g. BP’s senior management). It highlights interdependencies both within and between MCS and OI, emphasizing their roles in interacting within identity management. The longitudinal recovery is intricately tied to mutual political interests between BP and the USA, which are significantly facilitated by the media’s role.

This study acknowledges limitations that point future research opportunities. Interviews could provide a more dynamic understanding of MCS changes and organizational transformations. Investigating the role of leadership, particularly the new chief executive office, and the influence of political versus organizational factors in shaping identity claims is essential. Additionally, the effectiveness and historical context of interdependencies should be quantitatively assessed. Theoretical limitations in the OI and MCS frameworks suggest the need for context-specific categorisations. This research serves as a foundation for further exploration of the intricate dynamics between MCS, OI and organizational responses to crises.

This study offers valuable insights with practical implications for organizations facing identity challenges in the wake of significant incidents. Organizations can better navigate crises by recognizing the multifaceted role of MCS in identity damage and restoration. It underscores the importance of addressing both frontstage and backstage aspects of OI while managing identity discrepancies, thereby enhancing transparency and credibility. Additionally, understanding the intricate interdependencies within OI and MCS can guide organizations in implementing more effective identity restoration strategies. Furthermore, the study highlights the significance of media influence and the need to engage with it strategically during crisis management.

This study’s findings have significant social implications for organizations and the broader public. By recognizing the multifaceted role of MCS in shaping identity, organizations can enhance transparency and credibility, rebuilding trust with the public. Additionally, the study highlights the critical role of media in influencing perceptions and decision-making during crises, emphasizing the importance of responsible and ethical reporting. Understanding the intricate interplay between MCS and OI can inform better crisis management strategies and improve how organizations respond to and recover from incidents, ultimately benefiting society by promoting more accountable and responsible corporate behaviour.

This study’s distinctness lies in its innovative exploration of MCS, which transcends traditional methodologies that focus narrowly on front or backstage aspects of OI and often adhere to predetermined MCS practices. It underscores the importance of concurrently addressing both the front- and backstage audiences in managing the embarrassment caused by identity discrepancies and restoration. The research uncovers multifaceted interdependencies within MCS and OI, and these extend beyond simplistic relationships and emphasize the complex nature of identity restoration management.

Damage induced during drilling of polymer matrix composites depends upon torque during drilling. Modeling of torque with feed rate and its control becomes imminent for damage free drilling of composite laminates. Therefore, the purpose of this paper is to construct a transfer function between drilling torque and feed rate based upon experiments. Thereafter, the torque is controlled by using PID controller.

This paper presents step-by-step procedure to capture complex drilling dynamics of polymer matrix composites in a mathematical model. A glass fiber reinforced plastic (GFRP) composite laminate is drilled at constant feed rate during experimentation. The corresponding time response of torque is recorded. First order, second order and third order transfer functions between torque and feed rate are identified using system identification toolbox of Matlab®. These transfer functions are then converted into state-space models. Experimental verification is performed on GFRP composite laminate. PID controller is designed using Simulink® to track a given reference torque during drilling of polymer matrix composite. The controller is then validated using different reference torque trajectories.

Good match is observed between torque response from state-space models and experiments. Error analysis based on integral absolute error and integral squared error on experimental and simulated response show that third-order system represents the complex drilling dynamics in a better way than first and second-order systems. PID controller effectively tracks given reference trajectories.

Third-order model between torque and feed rate for drilling of composites not available in literature has been presented. PID controller has previously been applied successfully for drilling of conventional materials, this paper extends implementation of PID torque control for drilling of composites.

This study aims to conduct an experimental study and finite element model (FEM) to investigate the flexural behavior of heat-damaged beams strengthened/repaired by hybrid fiber-reinforced polymers (HFRP).

Two groups of beams of (150 × 250 × 1,200) mm were cast, strengthened and repaired using different configurations of HFRP and tested under four-point loadings. The first group was kept at room temperature, while the second group was exposed to a temperature of 400°C.

It was found that using multiple layers of carbon fiber-reinforced polymer (CFRP) and glass fiber-reinforced polymer (GFRP) enhanced the strength more than a single layer. Also, the order of two layers of FRP showed no effect on flexural behavior of beams. Using a three-layer scheme (attaching the GFRP first and followed by two layers of CFRP) exhibited increase in ultimate load more than the scheme attached by CFRP first. Furthermore, the scheme HGC (heated beam repaired with glass and carbon, in sequence) allowed to achieve residual flexural capacity of specimen exposed to 400°C. Typical flexural failure was observed in control and heat-damaged beams, whereas the strengthened/repaired beams failed by cover separation and FRP debonding, however, specimen repaired with two layers of GFRP failed by FRP rupture. The FEM results showed good agreement with experimental results.

Few researchers have studied the effects of HFRP on strengthening and repair of heated, damaged reinforced concrete (RC) beams. This paper investigates, both experimentally and analytically, the performance of externally strengthened and repaired RC beams, in flexure, with different FRP configurations of CFRP and GFRP.

The purpose of this study is to show that corporations may resort to legal compliance instead of acting voluntarily towards abatement of environmental damages as a strategy for improving their reputation.

Based on the natural philosophy and postulate of business, theoretical models have been developed to justify the purpose of this paper. Financial impacts of Indian revenue law on environmental damage prevention by the polluting firms have been gauged mathematically.

Corporate environmental responsibilities have seemed to be more reputation-led than innovation-led or efficiency-led. Reputation-led environmental responsibilities can have ways to bypass innovations and some firms can simply comply with regulations at the society’s cost (may be to a sizeable extent). If penalty is imposed on companies in the form of taxation for damaging the environment, then companies get chances to pass the financial burden to the shareholders in the form of lower dividend pay-outs. Unless the capital market supports corporate green initiatives, there may be destruction of shareholder wealth.

Extensive empirical analysis have not been conducted as the paper concentrates on developing theoretical understanding of the models of “green cost”.

The exploration and outcomes of this paper can offer several directions to the government, business and social activists in articulating green economic policy for the benefits of all.

The civil society will understand better what the corporate environmental responsibility really means for them.

This paper has made a modest endeavour to develop theoretical models of both “green cost internalisation” and “green cost externalisation”. It has paved the path for further deliberations and research.

The purpose of this paper is to present the research into fault detection and isolation (FDI) and evaluation of the reduction of performance after failures occurred in the flight control system (FCS) during its mission operation.

The FDI is accomplished via using the multiple models scheme which is developed based on the Extend Kalman Filter (EKF) algorithm. Towards this objective, the healthy mode of the FCS under different type of failures, including the control surfaces and structural, should be considered. It developed a bank of extended multiple models adaptive estimation (EMMAE) to detect and isolate the above mentioned failures in the FCS. In addition, the performances including the flight envelope, the voyage and endurance in cruising are proposed to reference and evaluate the process of mission, especially for UAV under failure conditions.

The contribution of this paper is to provide the information not only about the failures, but also considering whether the UAV can accomplish the task for the ground station.

The main contribution of this paper is in the areas of the structural and control surface faults researching, which are occurred in the mission procedures and emphasized the identification of those failures' magnitudes. The FDI scheme includes the performance evaluation, while the evaluation obtained through the extensive numerical simulations and saved in the offline database. As a consequence, it is more accurate and less computationally demanding while evaluating the performance.

The purpose of this paper is twofold. First, it proposes a basic organizing framework for when a plaintiff’s race, ethnicity, or sex may impact civil jury awards. The framework takes into account psychological and structural sources of bias and the ways in which they may interact when jurors have more or less discretion. Second, the paper employs a methodological innovation to overcome one of the primary barriers to empirical field research on bias in civil legal decisions: the absence of plaintiff demographic information.

The data set is comprised of jury verdicts in tort cases combined with information from the US Census Bureau regarding race and ethnicity. Statistical tests measure the relationships between race, ethnicity, sex, and awards for economic damages and pain and suffering.

Overall, the results were consistent with the psycho-structural framework. Where jurors had discretion (i.e. pain and suffering damages), they awarded less to black plaintiffs than to white plaintiffs, indicating potential psychological bias. Where jurors had little discretion (i.e. lost income) they awarded less to female plaintiffs and more to Asian plaintiffs than to male and white plaintiffs, respectively, a potential reflection of structural income disparities. Thus, the framework and method have promise for exploring relationships between structural and psychological bias and differential civil jury awards.

Because demographic information is not easily available, there is very little research on race and gender bias in civil cases. This study introduces and provides a conceptual test of a novel framework for when bias is most likely to impact damage awards in these cases and tests it using advances in social demography that can help researchers overcome this barrier.

THE Metrication Board, with Lord Ritchie‐Calder as chairman, began its existence on the first of this month. Its function is persuasive rather than mandatory, since there is no intention of any Whitehall plan being imposed on us. It is a voluntary movement which can rely upon Government support in areas which investigation has shown to be in need of it.

Crisis-prone organizations are reactive and unprepared, and are characterized by deficiencies in damage containment mechanisms (DCMs), which are tools and processes intended to prevent and/or manage crises. In the literature, DCMs are usually studied piecemeal and have not been studied in health organizations in a broader organizational context. Thus, this study aims to identify the use of DCMs and the frequency with which they are inspected, maintained and reviewed for design flaws.

Data were obtained by questionnaire from decision-making executives in hospitals, medical centers, aged care, pharmacies, dental clinics and practices in physiotherapy, chiropractic and podiatry.

Heavy reliance was placed on planning and technological DCMs while human and social methods were typically not considered. Organizations considered limited crisis types and there was a disconnect between the types of DCMs and the crises they targeted. Over half the organizations reviewed DCMs annually or more frequently. Backup DCMs mostly consisted of on-call staff and first responders with some auxiliary communications systems. Interviewees stated that these were designed to prevent financial, equipment breakdown, human resource and occupational safety crises.

Most organizations had inadequate DCMs due to a lack of top-down support, planning and foresight. Furthermore, these health organizations demonstrated a lack of understanding of what DCMs are and how they function. The conclusion is that most of the health organizations surveyed are crisis-prone and health leaders need to put more effort into looking broadly at DCMs to improve organizational preparedness.

This paper aims to understand how experience with the fringe effects of a cyclone influences perception of cyclone severity. Understanding how certain types of experience influences risk perception should help to clarify why there is an unclear link between experience and risk perception within the existing literature.

A total of 155 respondents with fringe cyclone experience were recruited to fill in a closed-ended question survey. The survey was designed to assess perceptions of a previous cyclone and future cyclone severity.

Most respondents who had experienced the fringe effects of a cyclone overestimated the wind speed in their location. Respondents who overestimated previous cyclone wind speed also predicted less damage from future Category 5 cyclones.

This research indicates that overestimating the severity of past cyclones can have a detrimental effect on how people predict damage due to high category cyclones.

The findings suggest that people with fringe cyclone experience need additional information to help reshape their perceptions of cyclone severity.

This paper provides a unique perspective on the relationship between experience and risk perception by demonstrating that experience on the fringe of a cyclone has a negative influence on risk perception.