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AM enables the design of compliant mechanisms that encode functions directly into geometry. Existing DfAM frameworks rarely address microscale AM, such as two-photon polymerisation (2PP). We present the design process of an airtight, monolithic bellows structure in rigid 2PP resin that serves both as a sensor and an actuator. Through co-evolution of problem and solution, we identify 2PP-specific design considerations and opportunities, including fabrication uncertainties, cross-scale iteration, and design for post-processing, contributing to a case-based DfAM framework for microscale AM.
Development of complex interdisciplinary products increases engineering challenges, that AI supported engineering approaches attempt to reduce by increasing automation. The resulting AI generated engineering artifacts, however, need to be classified, verified and managed to enable traceability and auditability of engineering decisions. This paper presents a classification and management approach for these artifacts, allowing verification of AI generated engineering artifacts. A use case on the iterative development of an e-bike demonstrates the approach.
Gauging the extent of public acceptability of reforms is an important concern for policymakers. Timely insights into public perceptions can illuminate how reforms are received and how attitudes evolve over time. In this study, we build on the OECD’s Public Acceptability Tool, a framework encompassing four key dimensions of reform acceptability—Economic, Fairness, Behavioural, and Process—to evaluate the public acceptability of policy reforms. We take the 2023 French pension reform as a relevant case study, using online media articles and parliamentary speeches as indicators of discourse surrounding the reform. Using word embeddings, we classify these texts according to the four dimensions and apply matrix factorisation topic algorithms to uncover the latent themes within each. Our analysis shows that the Process dimension dominated media coverage during the discussion and legislative phases of the reform, consistent with previous literature on pension reforms. In contrast, no particular dimension was predominant in parliamentary speeches, suggesting a mismatch between policy and public debates. Finally, we identify the main topics driving public discussion within each dimension, highlighting notable differences between media narratives and parliamentary discourse that offer further insight into the dynamics of public acceptability.
We investigate the influence of porous walls on the linear temporal stability of compressible boundary layers with adiabatic wall temperature, focusing on effects arising from variations in the porous wall configuration. Assuming an exponential base-flow profile and a regularly structured wall with cylindrical pores as a model assumption allows for an analytic solution of the underlying inviscid compressible Rayleigh equation in terms of the general Heun function, thereby reducing the problem to an algebraic eigenvalue equation. This enables the analysis of eigenmodes across a wide Mach number range and broad variations in the porous-wall parameters, porosity $\phi$ and layer thickness $h$, revealing a novel delineation of parameter regimes associated with different effects on the stability characteristics. We find that porous walls with very small porosities $\phi$ allow damping, whereas higher $\phi$ lead to destabilisation. The character of destabilisation is largely determined by the layer thickness: for larger $h$, long-wave, three-dimensional first-mode instabilities dominate, while small $h$ favour short-wave, two-dimensional second-mode instabilities. For intermediate $h$, the most unstable mode can be a two-dimensional first mode, in contrast to its usual three-dimensional character. Further, we show that the layer thickness $h$ causing strongest destabilisation at a given Mach number decreases with increasing $M$. The destabilising effect of porous walls also results in inviscid instabilities occurring at lower and even subsonic Mach numbers, provided $\phi$ and $h$ exceed certain thresholds. The threshold for $h$ is larger at lower $M$. Furthermore, increasing $h$ allows acoustically radiating supersonic instabilities with significant growth rates at lower Mach numbers.
It is some thirty-five years since the United Kingdom joined what is now called the European Union. What has been the impact of the EU on UK central government? Has it been transformed or merely adapted to new pressures and requirements? This book explores the ‘Europeanisation’ of the work of civil servants and ministers and how they engage with the EU. Drawing on fresh empirical evidence—including interviews with over 200 serving and retired officials and ministers—it offers a comprehensive analysis of the spreading impact of European integration across government. The study is placed in the context of political divisions over the European Union but the book outlines the often neglected way in which the EU has transformed the business of government. This account charts the process from the Macmillan government's 1961 application to join the European Communities through to the end of Tony Blair's premiership. The book examines the character and timing of responses across government, covering the core government departments and also those more recently affected, such as the Ministry of Defence. It argues that central government has organized itself efficiently to deal with the demands of EU membership despite the often controversial party-political divisions over Europe. However, in placing the book's findings in comparative context, the conclusion is that the effectiveness of UK governments in the EU has been less striking.
This chapter compares UK adaptation with that of other EU member states. By comparing the experiences of other member states, it seeks to give a clearer profile of the distinctive features of adjustment in UK central government. Second, it aims to build on the framework and explanatory model to offer a comparative approach to exploring the Europeanisation of member state institutions. The first section locates the UK response to Europeanisation in a comparative perspective using France and Germany as comparisons. The second section summarises the EU's impact on the working lives of civil servants and ministers across the EU. The third section seeks to identify analytical patterns of adaptation in central governments and government institutions more widely.
This chapter takes stock of the Europeanisation process across the board by evaluating the degree and extent of change that has taken place in Whitehall in the light of our institutionalist approach. It advances a model of Europeanisation to explain the character of adjustment that has come about. First, the chapter uses historical institutionalism as a way of taking stock of developments. Then, it moves on to explain why these changes have taken place, before returning to the model of Europeanisation and adapting and refining it in the light of the findings.
This chapter deals with the EU's impact upon, and the European policy-making patterns of, the outer core of central government. It considers two departments which have been affected by the EU relatively recently—the Home Office and the Ministry of Defence (MoD)—alongside other departments where the impact has been of longer standing but of a lesser order of magnitude. The Home Office and the MoD are the new institutions of European policy-making in Whitehall. The chapter also considers the role of the territorial/devolved authorities, namely the Scottish, Welsh and Northern Ireland Offices prior to devolution and their successor authorities from 1999.
In order to understand the notion of adapting to European integration both within government and in the wider political system, this chapter develops a conceptual framework through reference to ‘Europeanisation’ and institutionalism. Europeanisation dissects the phenomenon of adapting to integration. The discussion augments Europeanisation by using historical institutionalism to explore, over time, the adjustments of UK central government to the EU.
In sketching out the contemporary features of Whitehall's way of organising for Europe, this chapter concentrates on the three key organisations and the actors connected to them that are responsible for coordinating the handling of EU business above and across departments. These form the hub of the EU policy-making system. Initially, the chapter presents an outline of the contemporary structure and operation of this hub. The second half of the chapter considers the main structural and operational changes to it that have taken place since accession in 1973. The EU policy-making network can be defined in a general sense according to its membership but at any particular time according to the business being handled.
This chapter commences the study of adjustment within UK central government. It examines the process of coming to grips with integration: from the early 1960s, when the Macmillan government applied for membership to the EEC, up to accession. In examining the adaptation of the UK central government, the discussion argues that Whitehall's adaptation to Europe began well before UK accession.
This chapter explores the way in which the EU has impinged upon the inner core of departments most engaged in EU policy-making in UK central government. It prioritises certain parts of the Whitehall European policy-making network. These categories are: an inner core of ministries with extensive involvement in the EU: DEFRA, the Treasury and the DTI; other London-based ministries, which have varying degrees of involvement in EU business; and the ‘territorial’ ministries prior to devolution and subsequent arrangements in Scotland, Wales and Northern Ireland thereafter.
The United Kingdom's relationship with the European Union (EU) has been complex and troublesome. The relationship itself is multifaceted: open to historical, political, economic and legal analysis. This chapter sets the scene for the study. It reviews the key events in Britain's relationship with European integration. It highlights the controversies in Britain's relations with the EU and how they bear upon the central focus of the book, namely adaptation in central government. The chapter then examines the different component parts of the relationship by looking at aspects of the reception of European integration in the British polity, and the very different task of projecting British politics into the European arena.