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We investigate the shape of a tin sheet formed from a droplet struck by a nanosecond laser pulse. Specifically, we examine the dynamics of the process as a function of laser beam properties, focusing on the outstanding puzzle of curvature inversion: tin sheets produced in experiments and state-of-the-art extreme ultraviolet (EUV) nanolithography light sources curve in a direction opposite to previous theoretical predictions. We resolve this discrepancy by combining direct numerical simulations with experimental data, demonstrating that curvature inversion can be explained by an instantaneous pressure impulse with low kurtosis. Specifically, we parametrise a dimensionless pressure width, $ W$, using a raised cosine function and successfully reproduce the experimentally observed curvature over a wide range of laser-to-droplet diameter ratios, $ 0.3 \lt d/D_0 \lt 0.8$. The simulation process described in this work has applications in the EUV nanolithography industry, where a laser pulse deforms a droplet into a sheet, which is subsequently ionised by a second pulse to produce EUV-emitting plasma.
The diagnosis of an advanced life-threatening illness brings with it existential challenges that activate the attachment system and different attachment styles influence coping with advanced illness.
Objectives
The objective of this work were (a) to analyze the influence of attachment styles of patients with advanced disease and their relatives on emotional distress and other psychological and existential aspects, and (b) to identify the most used assessment instruments to measure it, highlighting those with better psychometric properties in palliative care contexts.
Methods
Articles on attachment published from October 2005 to February 2025 using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guide (PRISMA) were identified by searching PubMed, PsycINFO, Google Scholar, SCOPUS, Dialnet, and the Web of Science databases.
Results
Of 1847 studies identified, 24 were included (21 quantitative and 53 qualitative). Quality assessment revealed low risk of bias and high methodological quality. The main results indicated that a secure attachment style was associated with better coping, adaptation and adjustment strategies to the experience of illness, causing a buffering effect on suffering at the end of life. In contrast, patients with insecure attachment styles presented higher levels of emotional distress, demoralization, existential loneliness, death anxiety and showed a poorer psychological adaptation to cancer. Almost two-thirds of the studies (65.1%) used some version of Experiences in Close Relationships (ECR) scale.
Significance of results
The attachment theory appears to offer a valuable conceptual framework for understanding how individuals may respond to the emotional and relational demands associated with advanced illness and end-of-life care. Its contributions have been increasingly considered in literature addressing psychosocial adjustment and coping in palliative contexts
For the assessment of attachment styles in a palliative context, the most used instrument is the original ECR-M16 scale or its iderived versions.
The reuse of information derived from past archaeological investigations is integral to contemporary research practices. Yet, archiving practices of many (but not all) scholars, cultural resource managers, and public agencies often fall short of meeting standard best practices. This limitation impedes efficient and meaningful reuse of information in future research and management endeavors. To alleviate archival and reuse concerns, the development of publicly available, secure, online archives is crucial to improving scholarly research, assisting in land-planning activities and enhancing access to cultural heritage documents for Indigenous communities. In response to these challenges and in collaboration with state, federal, and tribal partners, the Center for Digital Antiquity established the Digital Archive of Huhugam Archaeology. This archive, preserved in the Digital Archaeological Record (tDAR), consolidates information from more than 90 years of archaeological investigations in central and southern Arizona. We outline the process of constructing the archive and describe the current methods for assessing reuse (distinguishing between quantity and quality) and the value of reuse. Even though metrics such as page views and downloads are used often, we believe that when used on their own they fail to adequately capture the true value of reused data for academics, cultural resource managers, Indigenous communities, and the public.
The Silurian inliers of the Pentland Hills contain abundant and diverse fossil assemblages and have interested geologists for more than 150 years. However, the faunas are very different from those found in the classic Anglo-Welsh area or the Spanish El Pintado Global Boundary Stratotype Section and Point (GSSP) for the Telychian Stage in peri-Gondwana. Initial geological exploration of the hills found few fossils, with little meaningful interest shown in the area until Dr Archibald Lamont, a controversial Scottish geologist, began researching the inliers. Lamont was the first to suggest that the rocks might be upper Llandovery rather than Wenlock, and went on to propose that their unique fossil assemblages warranted a new division being erected between the Llandovery and Wenlock series, which he named the ‘Pentlandian’. This new division was rejected by the international geological community. Euan Clarkson’s arrival in Edinburgh and his introduction to the Pentland Hills began what would be a lifetime’s fascination with the geology of the area. He instigated an extensive series of research projects and recruited researchers looking at the geology and a wide range of fossil groups, the most abundant of which is the Brachiopoda. The Telychian Wether Law Linn Formation in particular contains many shelly and graptolite faunas enabling correlation. The palaeocommunities identified suggest a deeper-water palaeoenvironment with finer-grained siliciclastic sediments set in a regressive marine sedimentary succession. Multivariate analyses show the mutual proximity of the Pentland associations and their distinctiveness from other Llandovery faunas. The Pentlandian is considered a regional term but the distinctive nature of the Pentlandian biotas, on a global scale, is confirmed and introduced here as the Pentlandian Biotic Complex.
This study reviews Crangopsis based on newly collected material from Carlops, Bearsden (and equivalent exposures of the same horizon), Granton and Ardross and a redescription of older collections mostly held in The Hunterian, University of Glasgow, Scotland. Two new species, Crangopsis carlopsensis sp. nov. and Crangopsis baljaffrayensis sp. nov., are described based on diagnostic character differences such as the shape of the pleura on the pleon. Newly observed structures on Crangopsis include a short acute ridge of unknown purpose on the pleonal pleura, a short rostrum, a vertical straight cervical groove on the carapace, as well as several thoracic body segments (thoracomeres) that do not appear to be attached to the carapace. The eight paired thoracopods and two maxillipeds and the separate thoracomeres indicate that Crangopsis is an early member of the Mysidacea.
Scholars often find Luke’s depiction of the Temple conflicting and paradoxical, and various solutions have been proposed to account for this perceived tension. In this article, I attempt to elucidate Luke’s treatment of the Temple by considering it from a different angle: how is Luke, in light of the recent siege of Jerusalem and destruction of the Temple, responding to those events, and what type of response does he hope to engender in his readers? Considering Luke’s treatment of the Temple as a “response” to its destruction clarifies the rhetorical goals of his narrative and accounts for the range of themes that have proved confounding for many interpreters.
Although political cartoons were a dominant form of visual political media during the Gilded Age and Progressive Era, historians have paid little attention to how the contentious tariff debate of the time was reflected in this medium. This article examines the visual strategies used by protectionist agitators, focusing on the cartoons published by the American Protective Tariff League in its weekly newspaper, the American Economist, between 1894 and 1909. Frequently reproduced in other newspapers, these cartoons reached a broad readership. Through an analysis of recurring symbols, metaphors, and visualization patterns, the article shows how protectionists used cartoons to transform the abstract and somewhat esoteric economic issue of tariffs into an attractive political cause that resonated deeply with ordinary Americans. Demonstrating how cartoons served to simplify, dramatize, and emotionalize the tariff issue, the article thus expands our understanding of the cultural forces that underpinned protectionism’s attractiveness as a political ideology around the turn of the century. Overall, the presentation of the tariff issue in these cartoons amounted to a peculiar mix of fearmongering and promise. While the tariff was usually depicted through metaphors of protection and defense against an imminent threat, the abstract concept of protectionism was visually displayed through metaphors evoking a general notion of prosperity as its alleged result.
We study the two-dimensional steady-state creeping flow in a converging–diverging channel gap formed by two immobile rollers of identical radius. For this purpose, we analyse the Stokes equation in the streamfunction formulation, i.e. the biharmonic equation, which has homogeneous and particular solutions in the roll-adapted bipolar coordinate system. The analysis of existing works, investigating the particular solutions allowing arbitrary velocities at the two rollers, is extended by an investigation of homogeneous solutions. These can be reduced to an algebraic eigenvalue problem, whereby the associated discrete but infinite eigenvalue spectrum generates symmetric and asymmetric eigenfunctions with respect to the centre line between the rollers. These represent nested viscous vortex structures, which form a counter-rotating chain of vortices for the smallest unsymmetrical eigenvalue. With increasing eigenvalue, increasingly complex finger-like structures with more and more layered vortices are formed, which continuously form more free stagnation points. In the symmetrical case, all structures are mirror-symmetrical to the centre line and with increasing eigenvalues, finger-like nested vortex structures are also formed. As the gap height in the pressure gap decreases, the vortex density increases, i.e. the number of vortices per unit length increases, or the length scales of the vortices decrease. At the same time the rate of decay between subsequent vortices increases and reaches and asymptotic limit as the gap vanishes.
In this paper I offer a defence of absence causation in response to a central challenge: the problem of profligacy. Focussing on two related cases of absence causation, holes and surface absences, the account of absence causation offered for these cases has the following attractions: it captures the central features of many of our common-sense judgments about absence causation in these cases; it doesn’t appeal to norms; and is grounded in salient features of the metaphysics of the cases. As such, there’s a metaphysically respectable, principled criterion for absence causation that solves the problem of profligacy for these cases.
With this issue, The Americas inaugurates a new section, In Dialogue, dedicated to fostering scholarly exchange through the publication of clusters of articles that speak directly to one another. This format is designed as a space between a traditional special issue and the standard publication of individual research articles. By presenting paired or grouped pieces that clearly intersect, we hope to highlight conversations already emerging across historical fields, disciplines, geographies, and methodological approaches.
Wilbrand von Oldenburg was born in the second half of the twelfth century into a noble Germanic family and embarked on an ecclesiastical career while still young, becoming canon of the cathedral chapter of Hildesheim in 1211. Linked to the political circles of the empire’s high officials and the religious circles that supported the emperor, he travelled to the Holy Land from 1211 to 1213 for purposes of diplomacy and pilgrimage. The Itinerarium Terrae Sanctae is a significant source of information about the political, military and ecclesiastical affairs of the recent Christian kingdom of Lesser Armenia, Cyprus and territories such as Palestine, Lebanon and Syria, characterised by the coexistence of different peoples and religions. Wilbrand also recounts this diversity through the soundscape he encounters. Perhaps the most interesting sound element of the travel account is the description of the music of the kingdom of Cilicia, particularly for the feast of the day of Epiphany, including the procession of the sovereign and clergy. The many musical details in the text testify to ritual practices that can be traced back, in some respects, to Eastern Greek customs and, in others, to Latin ceremonials, particularly the Franco-Ottonian imperial model. Finally, an unexpected account of discantus for the rite of the day of Epiphany in aurora provides an opportunity to reflect on Wilbrand’s terminology in reference to liturgical musical performance for the intonation of the office, the recitation of epistles and gospels, and the rituals of the most solemn ceremonies.
This paper critiques the ‘Trolley Problem’ tradition in moral philosophy as simplistically reductive and dangerous in its applications. Beginning with Philippa Foot’s abortion arguments and evolving through Judith Thomson’s and Robert Nozick’s work, trolleyology abstracts moral decisions from social context, masking a politics of extreme individualism. This decontextualized approach, masquerading as objective moral science, has pernicious real-world consequences. The paper traces how trolleyology has influenced ‘Revisionist’ Just War theory, which reduces collective political conflict to individual self-defense scenarios. This reductive framework has helped justify contemporary drone warfare and targeted killing by treating complex military decisions as simple moral calculations. I argue that genuine ethical thought requires engagement with social context, relationships, and political complexity rather than abstract thought experiments.
We analyse the process of convective mixing in two-dimensional, homogeneous and isotropic porous media with dispersion. We considered a Rayleigh–Taylor instability in which the presence of a solute produces density differences driving the flow. The effect of dispersion is modelled using an anisotropic Fickian dispersion tensor (Bear, J. Geophys. Res., vol. 66, 1961, pp. 1185–1197). In addition to molecular diffusion ($D_m^*$), the solute is redistributed by an additional spreading, in longitudinal and transverse flow directions, which is quantified by the coefficients $D_l^*$ and $D_t^*$, respectively, and it is produced by the presence of the pores. The flow is controlled by three dimensionless parameters: the Rayleigh–Darcy number $\textit{Ra}$, defining the relative strength of convection and diffusion, and the dispersion parameters $r=D_l^*/D_t^*$ and $\varDelta =D_m^*/D_t^*$. With the aid of numerical Darcy simulations, we investigate the mixing dynamics without and with dispersion. We find that in the absence of dispersion ($\varDelta \to \infty$) the dynamics is self-similar and independent of $\textit{Ra}$, and the flow evolves following several regimes, which we analyse. Then we analyse the effect of dispersion on the flow evolution for a fixed value of the Rayleigh–Darcy number ($\textit{Ra}=10^4$). A detailed analysis of the molecular and dispersive components of the mean scalar dissipation reveals a complex interplay between flow structures and solute mixing. We find that the dispersion parameters $r$ and $\varDelta$ affect the formation of fingers and their dynamics: the lower the value of $\varDelta$ (or the larger the value of $r$), the wider, more convoluted and diffused the fingers. We also find that for strong anisotropy, $r=O(10)$, the role of $\varDelta$ is crucial: except for the intermediate phases of the flow dynamics, dispersive flows show more efficient (or at least comparable) mixing than in non-dispersive systems. Finally, we look at the effect of the anisotropy ratio $r$, and we find that it produces only second-order effects, with relevant changes limited to the intermediate phase of the flow evolution, where it appears that the mixing is more efficient for small values of anisotropy. The proposed theoretical framework, in combination with pore-scale simulations and bead packs experiments, can be used to validate and improve current dispersion models to obtain more reliable estimates of solute transport and spreading in buoyancy-driven subsurface flows.
How should New Testament scholarship theorize enslavement, mainly when the victim’s experience is both linguistically unrepresentable (the very essence of pain) and, more relevantly, when primary sources do not contain first-person testimonies? Specifically, how does historiography account for the plight experienced by victims of enslavement when the historical archive is empty of the victims’ voices and, in many cases, mystifies, allegorizes, or erases the victims’ agony? I study the figure of the captive in Galatians 4:1–9 from the perspective of recent historiographical insights in the study of the Middle Passage. This article argues that the binary captive/free-person is foundational to important theological concepts in Paul, such as filiation and inheritance.
While political opposition to economic globalisation has increased, several governments have adopted stricter unilateral interventions in global supply chains in the name of sustainability, despite their potentially significant economic costs. We argue that these policy choices are partly driven by politicians’ incentives to align with domestic public opinion. In particular, new information disclosure rules enable governments to implement market access restrictions compliant with binding trade liberalisation commitments while (a priori) obscuring their costs to voters. We assess the latter argument with original survey data and experiments with representative samples from the twelve major OECD importing economies (N = 24,000). Indeed, citizens expect substantive benefits while discounting costs from these new regulations, resulting in majority support for rather stringent standards. We further observe that these relationships are muted in countries with high trade exposure. These findings suggest that governments may strategically implement unilateral policies with high-cost obfuscation to garner domestic voter support, driving regulatory proliferation in international economic relations.
The War of Jenkins’ Ear (from 1739 to 1748), more accurately known in Spanish as the “Guerra del Asiento,” marked the end of the Spanish Crown’s authorization of the British monopoly of the South Sea Company to deliver captive Africans to the Spanish Americas. The end of the British Asiento led to four decades of experimentation by various actors within the Spanish Empire trying to reestablish and expand the slave trade, which many Spanish political economy leaders increasingly saw as vital to the future of both the metropolis and the colonies. This article examines certain currents, undercurrents, and countercurrents of the deregulation of the slave trade, linking these debates to the evolving policies on colonial commerce within the Spanish Empire, as authorities in Iberia and the Americas recognized the interconnectedness of these issues and their relationship to the actual slave trading in the colonies. Besides focusing on colonial elites and reforms in colonial governance, this article demonstrates that the timelines of reforms in overall trade policy and measures regarding the slave trade were closely connected.
An open question about cartography is whether one and the same functional head may iterate on the functional hierarchy. We demonstrate that the stackability of certain modals from the same semantic class in Mandarin offers clear evidence for such a possibility.