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The classical problem of steady rarefied gas flow past an infinitely thin circular disk is revisited, with particular emphasis on the gas behaviour near the disk edge. The uniform flow is assumed to be perpendicular to the disk surface. An integral equation for the velocity distribution function, derived from the linearised Bhatnagar–Gross–Krook model of the Boltzmann equation and subject to diffuse reflection boundary conditions, is solved numerically. The numerical method fully accounts for the discontinuity in the velocity distribution function that arises due to the presence of the edge. It is found that a kinetic boundary layer forms near the disk edge, extending over several mean free paths, and that its magnitude scales as $\textit{Kn}^{1/2}$ as the Knudsen number $\textit{Kn}$ (defined with respect to the disk radius) tends to zero. A thermal polarisation effect, previously studied for spherical geometries, is also observed in the disk case, with a more pronounced manifestation near the edge that exhibits the same $\textit{Kn}^{1/2}$ scaling. The drag force acting on the disk is computed over a wide range of Knudsen numbers and shows good agreement with existing results for a hard-sphere gas and in the near-free-molecular regime.
Chapter 5 focuses on two biographical compilations of Afro-Argentines who are considered role models for the community. These biographies not only present a written portrait of each individual but also include a corresponding visual portrait, a feature that enriches the compilations. They were an attempt to construct an Afro-Argentine memory and imaginary, and the construction of this collective memory implied affection, bonds of proximity, and even intimacy The inclusion of portraits shows how important images were to the promoters of the publication in their role as mentors of the community. On the one hand, the inclusion of engravings was a way of complying with the precepts of progress and civilization, given the growing development of illustrated publications at the time. On the other hand, the possibility of seeing and recognizing the faces of notable people implied an affective dimension of which Afro-Porteño intellectuals were aware. This was because, in addition to being individuals who enjoyed a certain prestige (to a greater or lesser extent) not only within the group but also in the rest of Buenos Aires society, the members of the community were in almost daily contact with them and their relatives, often as friends.
This article examines the portrayal of social class and conviviality in Aristophanes’ Wasps 1208–15 and argues that the passage—in which Bdelycleon corrects Philocleon’s clumsy reclining as he prepares to attend an elite symposion—assumes that Philocleon (though a man of modest means) is no novice to reclined symposia, merely to the elegance expected of wealthy symposiasts. It is argued that the exchange between father and son focusses on reclining elegantly rather than on more rudimentary points, and that the passage’s language of haste suggests the matter is viewed as a trivial preliminary to more important components of Philocleon’s sympotic education. The article then considers external evidence supporting the argument that symposia were widespread through the social spectrum in fifth-century Athens, although more modest symposia did not employ costly paraphernalia such as banqueting klinai. Based on this external evidence and on consideration of the terminology in Wasps 1208–15, it is further argued that a klinê would have been used as a prop during the scene and that the scene centres on Philocleon’s unfamiliarity with using this costly piece of furniture rather than on more general ignorance of reclined conviviality. This conclusion has implications for sympotic scholarship, which remains divided on the extent to which symposia were restricted to the wealthy elite in Classical Athens. This article provides support for the position that sympotic conviviality was widespread across the social spectrum and that differences between elite and non-elite symposia centred on paraphernalia (such as banqueting klinai) and behavioural norms.
This chapter describes the Mental Health Gap Action Programme (mhGAP) and the mhGAP-Intervention Guide (mhGAP-IG) developed by the World Health Organization (WHO), aimed at scaling up suicide prevention and management services to bridge unmet need.The mhGAP-IG is an evidence-based tool for mental disorders with structured and operationalised guidelines for clinical decision-making targeting non-specialist community and primary care workers in low and middle-income countries (LMICs).
This chapter considers Clara’s 1842 tour in Northern Germany and Copenhagen – the first after her 1840 marriage and the 1841 birth of her first child – and the tensions that arose between her professional ambitions and socially-prescribed responsibilities as wife and mother. Drawing from correspondence and the Schumanns’ marriage diaries, I trace how Clara eased those tensions through rhetorical manoeuvres and performance strategies that transformed her work in the masculine public sphere of touring into the work expected of her in the feminine private sphere of the home. Tropes of sacrifice such as familial care feature heavily in how Clara justified to Robert (and to herself) her desire to continue touring after 1840. Additionally, her performance style and repertoire choices on tour are linked to images of the caring mother. This analysis highlights the unique forms taken by women’s labour in the creation of artistic cultures during the era of separate spheres.
This chapter looks at forms of uncertainty that occur at different stages of married life. A central question here is what does uncertainty produce? The chapter focuses partly on Malay protagonists and on two particularly fragile moments in Malay marriage: during betrothal and, counterintuitively, much later on, after several decades, when one might expect marriages to be highly stable. The former was a pattern familiar from earlier research. But some older Malay women spoke of a more recent trend – for husbands of many years to marry a younger woman polygamously. Meanwhile, other, non-Malay, couples have adopted unconventional living arrangements or have taken unusual paths to suit their particular circumstances. In considering how different kinds of marital uncertainty play out, the significance of expectations about marriage and the registers of temporality through which they are calibrated and recalibrated are illuminated. The force of unanticipated events stimulates the reflection of protagonists and their consociates – as readers may recognise from their own experiences – reformulating ideas of what is appropriate or acceptable behaviour, and precipitating new ethical stances.
The aim of this book is to provide evidence to inform the development and implementation of suicide prevention globally. It covers a range of topics that are relevant from local to national levels. It has an unapologetic emphasis on social determinants of suicide and a global perspective, with utility across the world as a primary resource by practitioners and policymakers. It aims at accessibility, with an emphasis on what can be achieved given the current knowledge base.
A central message of this book is the importance of using rigorous evidence to guide suicide prevention, whilst recognising that the best evidence is always partial. Key research is cited in the text and readers are, in places, directed to public-domain digital resources. The book aims to have relevance in low- and middle-income countries, as well as in high-income countries. It is not a country-by-country international overview.
By the early 1930s, the Nazi movement had been dramatically transformed. The medical profession, for example, became heavily influenced by the Nazi movement. Michael Kater estimated that doctors were over-represented in the Nazi Party by a factor of three by the end of Weimar and that 45 per cent joined during the Third Reich. Republican contemporaries were, understandably, scathing critics of National Socialist ideology, but they were mistaken to write off the Nazi movement as being driven solely or even primarily by crassly wrongheaded utopianism or millenarianism. The Republic's welfare system, upgraded as recently as 1927, was in complete disarray from mid-1930 onwards. A contributory system, it was hit by falling receipts and simultaneously rising expenditure once unemployment in Germany began to surge. Forced auctions and dispossessions had become commonplace in rural Germany.
Bastardy is condemned by the highest moral authority, divine law, which is incorruptible. Religious authority formed the backbone of patriarchal order in Renaissance England so the spiritual condemnation of bastardy had important economic and social dimensions. In short, bastardy was ideal to create a humanised version of the morality Vices in a secular play while maintaining an easily identifiable evil 'type'. The majority of Renaissance plays linking bastardy and the Church do so to criticise Catholicism. The Bible's exclusion of illegitimates from the kingdom of heaven is a starting point for characters who, instead of being allied with satanic powers, are utterly detached from religious doctrine, unnervingly atheistic in outlook. These characters make an outright rejection of the moral order which labelled bastardy as the accursed share. Fears about new rational thinking were actually exacerbated by the Protestant culture.
In Navier–Stokes (NS) turbulence, large-scale turbulent flows inevitably determine small-scale flows. Previous studies using data assimilation with the three-dimensional (3-D) NS equations indicate that employing observational data resolved down to a specific length scale, $\ell ^{\rm 3\text{-}D}_{\ast }$, enables the successful reconstruction of small-scale flows. Such a length scale of ‘essential resolution of observation’ for reconstruction $\ell ^{\rm 3\text{-}D}_{\ast }$ is close to the dissipation scale in three-dimensional NS turbulence. Here, we study the equivalent length scale in two-dimensional (2-D) NS turbulence, $\ell ^{\rm 2\text{-}D}_{\ast }$, and compare with the three-dimensional case. Our numerical studies using data assimilation and conditional Lyapunov exponents reveal that, for Kolmogorov flows with Ekman drag, the length scale $\ell ^{\rm 2\text{-}D}_{\ast }$ is actually close to the forcing scale, substantially larger than the dissipation scale. Furthermore, we discuss the origin of the significant relative difference between the length scales, $\ell ^{\rm 2\text{-}D}_{\ast }$ and $\ell ^{\rm 3\text{-}D}_{\ast }$, based on inter-scale interactions, ‘cascades’ and orbital instabilities in turbulence dynamics.
Robert Schumann’s health issues have prompted sustained debates amongst physicians, historians, and musicologists. Proposed etiologies for his decline span bipolar disorder, schizophrenia, neurosyphilis, vascular disease, alcoholism, and personality disorders. Because his final years were spent in a psychiatric asylum, a retroactive narrative of inexorable decline has too often prevailed. Yet this reading reduces a richly textured life into pathology, overlooking Schumann’s literary imagination, resilience in the face of numerous personal losses, and unwavering devotion to music that persisted – often flourished – despite illness. This chapter discusses the diagnostic spectrum and its historiographical contexts from Richarz’s nineteenth-century ‘overwork exhaustion’ to Möbius’s dementia praecox, through contemporary arguments for bipolar disorder with psychotic features and tertiary neurosyphilis. It shows how shifting medical paradigms and cultural frameworks shape our understanding of genius, suffering, and the enduring interplay between creativity and illness.
The introductory chapter introduces the contemporary challenge of immigration from a psychological perspective. The focus is on how host society members and immigrants feel about and perceive the situation. In the twenty-first century, at least some host society members in Western and non-Western countries perceive immigration as a threat. This perceived threat can be economic (e.g., they are coming here and taking our jobs) and/or cultural (e.g., they are not adapting to our way of life and language, but continuing to live in their own ways). Central to the controversy of immigration is national identity, and the threat of immigrants against “who we are.” The plan of the book and the major psychological themes underlying immigration are described.