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This chapter looks at the need for the central bank to shift their mindset more towards resilience instead of stability at all costs, as well as embracing innovation, experimentation and testing. The chapter then looks at the need for the central bank to upgrade their mode of operations, particularly to achieve a better balance between rules-based and goals-based regulations, and a more collaborative approach towards stakeholders. This chapter ends by looking at the need for digital transformation of central banking operations, both for those external oriented, e.g. SupTech and RegTech, and those internal-oriented.

Regulated differently in modern constitutions, emergency rule is a case of awkward, and dilemmatic, legal fine-tuning of an ambivalent political move that leads the executive of a democratic regime to the verge of the constitutional system. For that reason, as an utmost situation, emergency rule becomes a testing field for the resilience of the constitutional order. It affects its own foundations, the basic rights, and thus the constitutional capability to make possible their fulfilment. It also serves to appraise the workings of democratic regimes and, accordingly, the type of legitimacy derived from their institutional performance. Furthermore, it provides a vantage point to watch the reactions of both their representatives and their publics. Focussed on the COVID-19 pandemic, this chapter compares the cases of Germany and Spain through their legal regulations of emergency rule and their governments’ responses. Having rather analogous emergency legislations, from 2020 through 2022, there have been significant differences in their decision-making patterns.

Reducing aircraft fuel consumption has become a paramount research area, focusing on optimizing operational parameters like speed and altitude during the cruise phase. However, the existing methods for fuel reduction often rely on complex experimental calculations and data extraction from embedded systems, making practical implementation challenging. To address this, this study aims to devise a simple and accessible approach using available information.

In this paper, a novel analytic method to estimate and optimize fuel consumption for aircraft equipped with jet engines is proposed, with a particular emphasis on speed and altitude parameters. The dynamic variations in weight caused by fuel consumption during flight are also accounted for. The derived fuel consumption equation was rigorously validated by applying it to the Boeing 737–700 and comparing the results against the fuel consumption reference tables provided in the Boeing manual. Remarkably, the equation yielded closely aligned outcomes across various altitudes studied. In the second part of this paper, a pioneering approach is introduced by leveraging the particle swarm optimization algorithm (PSO). This novel application of PSO allows us to explore the equation’s potential in finding the optimal altitude and speed for an actual flight from Algiers to Brussels.

The results demonstrate that using the main findings of this study, including the innovative equation and the application of PSO, significantly simplifies and expedites the process of determining the ideal parameters, showcasing the practical applicability of the approach.

The suggested methodology stands out for its simplicity and practicality, particularly when compared to alternative approaches, owing to the ready availability of data for utilization. Nevertheless, its applicability is limited in scenarios where zero wind effects are a prevailing factor.

The research opens up new possibilities for fuel-efficient aviation, with a particular focus on the development of a unique fuel consumption equation and the pioneering use of the PSO algorithm for optimizing flight parameters. This study’s accessible approach can pave the way for more environmentally conscious and economical flight operations.

Climate change significantly impacts global temperatures, posing challenges to various sectors, including aviation. The purpose of this study is to assess the impact of climate change on aircraft engine performance during different flight phases (take-off and cruise) and the environmental consequences.

This study examines the effects of rising temperatures on aircraft engine performance using real-time data from a Boeing 787-8 equipped with GEnx-1B engines, which are collected via Flight Data Recorder of the engines and were analyzed for the take-off and cruise phases on the ground. Exhaust gas temperature (EGT), fuel flow and take-off weights were evaluated.

The analysis revealed a significant increase in EGT at the cruising altitude of 38,000 ft during the summer months compared to expected standard atmospheric values. This increase, averaging over 200 °C, is attributed to global warming. Such elevated temperatures are likely to accelerate the degradation of turbine components, resulting in increased fuel consumption: higher EGT signifies inefficient engine operation, resulting in more fuel burned per unit thrust; early engine aging: elevated temperatures accelerate wear and tear on turbine components, potentially reducing engine lifespan and increasing maintenance costs and enhanced atmospheric pollution: incomplete combustion at high EGTs generates additional emissions, contributing to local air quality concerns.

The research findings have practical implications for understanding the potential operational challenges and environmental impacts of climate change on aircraft engine performance. This lets us explore mitigation strategies and adapt operational procedures to ensure sustainable regional aviation practices.

This research enhances environmental consequences by assessing the impact of climate change on aircraft performance.

This chapter examines possible regulatory updates to address the challenges of monetary sovereignty and singleness of money. These two challenges are particularly pertinent to the new means of payments enabled by the use of distributed ledger technology (DLT). These new means of payment include cryptoassets such as bitcoin and ether, stablecoins and tokenized deposits. The degree to which these new means of payment can be a threat to monetary sovereignty and singleness of money can differ widely, depending on the contexts of the jurisdictions, as well as the details of these new means of payment themselves.

This chapter first reviews the current stages of retail CBDC development before examining some of the common characteristics of retail CBDC projects being proposed in various jurisdictions. This chapter then examines the possible future of retail CBDC going forward.

This study aims to assess the effectiveness of active teaching methodologies, namely, problem-oriented learning and the case method, to develop sustainability competencies. It also analyses the advantages and challenges for teachers when implementing the sustainable development goals (SDGs) in eight undergraduate and postgraduate degrees within the framework of a cross-departmental collaboration.

A mixed research methodology was used: a quantitative study to assess the levels of acquisition of sustainability and research competencies and the potential correlation between them, as well as a mixed study of the advantages and challenges for the teachers participating in the cross-departmental initiative. Curriculum content linked to the SDGs was worked on. Active teaching methodologies and a competency assessment rubric were used as curriculum implementation strategies in the eight courses involved.

Active teaching methodologies are suitable to implement the SDGs in university teaching and to develop both sustainability and research competencies. A synergic effect is observed between them. Coordinated work between teachers of different subjects in several degrees contributes to developing a culture of sustainability at the university.

Although the collaboration between teachers from different disciplines was successful, this study did not promote interdisciplinary projects among students from different degrees. This promises to be highly valuable for future research.

Students can become present and future leaders in achieving the SDGs. This approach can be replicated in other educational institutions.

This study bridges the gap between theoretical recommendations and the practical implementation of the SDGs in undergraduate and postgraduate degrees.

Coordinated work between teachers of different subjects in different degrees contributes to the development of a culture of sustainability at the university.