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This article critically assesses the popular nineteenth-century universal history textbook Elements of General History, Ancient and Modern, by Alexander Fraser Tytler. Educators on both sides of the Atlantic found the text to be a useful and authoritative source of universal history appropriate for secondary and tertiary students for decades, indicating a shared vision for human history centering Europe as the apotheosis of human civilization. Over time, publishers and educators creatively adapted the work by inserting new research, enhancing coverage of national history, and adding religious content. American educators retrofitted the work to provide an origin story for the United States in which America was the heir to European civilization. The sustained success of Tytler’s narrative in the United States demonstrates that Eurocentric world histories have been deeply entwined with American education since the emergence of history as a school subject, providing a civilizational framing that complemented the ideology of American exceptionalism.
Understanding the rheology of granular surface flows remains a significant challenge, particularly when inertial and cohesive interactions occur between particles to trigger complex regime transitions. This study investigates the steady flow dynamics of dry and cohesive granular materials through systematic rotating drum experiments, focusing on the effects of rotation speed, drum-to-particle size ratio and cohesion level. Scaling laws were further established to capture the combined effects of these factors and provide a unified description of flow behaviour across both dry and cohesive regimes. Results show that, for dry granular flows, both the normalised flowing layer thickness $\delta_0/d$ where $\delta_0$ is flowing layer thickness and $d$ represents the particle diameter and dynamic angle of repose tan $\beta$0 increase with Froude number, with a critical transition angle of tan $\beta$0 ≈ 0.58 marking the onset of cascading. The presence of interstitial liquid induces capillary cohesion, leading to a plug-like flow with a convex free surface and higher $\beta$0 and δ0. A new dimensionless governing parameter, derived from dimensional analysis incorporating a capillary time scale, successfully collapses nearly all experimental data onto single master curves that exhibit clear power-law behaviour, capturing the combined effects of inertia, size and cohesion. Furthermore, rheological interpretation within the μ(I) framework, where $\mu$ represents the effective friction coefficient and I denotes the inertial number reveals rate-dependent frictional strengthening for both dry and cohesive cases, with cohesive flows exhibiting consistently higher resistance induced by interparticle capillary cohesion.
One argument that all explanations are causal explanations is that no extant analysis of non-causal explanations can respect mandatory restrictions on explanation. After articulating two such restrictions, Asymmetry and Directionality, we consider how they work with respect to an explanation from network theory that applies to both social and brain networks. We argue that there are two viable ways to make sense of this explanation. One approach is broadly ontic, while another is pragmatic.
This study examines prosecutorial resistance to democratic backsliding in Poland (2016–23) using Šipulová’s three-dimensional analytical framework. Despite facing greater structural vulnerabilities than judges – hierarchical subordination, immediate retaliation risks and weaker formal protections – Polish prosecutors developed sophisticated resistance strategies combining on-bench actions (challenging illegitimate orders, refusing transfers) with off-bench mobilisation (professional associations, media engagement, coalition-building with judges and civil society). Based on interviews with eleven prosecutors, the research reveals a paradoxical effectiveness pattern: minimal immediate political impact coupled with significant long-term achievements. While unable to prevent institutional capture, prosecutors elevated their professional standing, fostered unprecedented interprofessional solidarity and raised societal awareness about prosecutorial independence. The study demonstrates that prosecutorial resistance functions as democratic preservation rather than immediate political opposition, maintaining institutional memory and professional standards crucial for future democratic reconstruction.
In this paper, I distinguish between three different roles that symmetries play in physics practice that are not always distinguished in the philosophical literature and which seem to clash with each other. I then propose that the best way to make sense of these roles requires introducing a distinction between two different kinds of symmetries. One kind concerns invertible transformations that map solutions to solutions. The other is associated with the fact that one can use the same equation to model a system in many different frames.
Small-quantity lipid-based nutrient supplements (SQ-LNS) have been shown to improve growth, development and survival among young children in low-resource settings. One hypothesised pathway is through improvements in intestinal health, including modulation of the gut microbiome and reductions in environmental enteric dysfunction (EED). This study examined the effects of SQ-LNS on the gut microbiome and markers of EED and systemic inflammation among young children in Lusaka, Zambia. We conducted intention-to-treat analyses of 302 children aged 27–35 months in a 2 × 2 cluster-randomised trial. Serum biomarkers of EED (soluble CD14, intestinal fatty acid-binding protein) and inflammation (α-1-acid glycoprotein and C-reactive protein) were assessed in 240 children via the Micronutrient and Environmental Enteric Dysfunction Assessment Tool. Differences by SQ-LNS assignment were assessed using unadjusted and adjusted ordinary least squares regression models. Rectal swab samples from 299 children underwent 16S rRNA gene sequencing. Taxonomic profiles were visualised using stacked bar plots, alpha diversity was quantified using Shannon diversity indices and beta diversity was assessed using non-metric multidimensional scaling based on Bray–Curtis dissimilarity matrices. We found that SQ-LNS had no significant effect on EED or inflammation biomarkers and was not associated with differences in gut microbiome α diversity, beta diversity or overall microbial community composition. In exploratory analyses, Enterococcus abundance was lower among children receiving SQ-LNS. Overall, 18 months of SQ-LNS supplementation was not associated with broad changes in intestinal health among young Lusakan children. These findings suggest that the benefits of SQ-LNS operate through pathways other than intestinal health, such as improved nutrient availability.
Through a qualitative analysis of case studies from Boston in the 1970s and 1980s, this article explores how police officers exploited sex workers in pursuit of department goals and personal desires, all while attracting opposition from sex workers and their allies, who likened cops to pimps. Examining police-sex worker interactions documented in the commercial press, alternative media, appellate court rulings, and police documents, this article incorporates the police-as-pimp metaphor to elucidate the nature of police discretion in the context of sex work. When dealing with sex workers, officers proved willing to choose lawlessness if it helped them accomplish other personal and professional goals. Yet this article goes beyond condemning individual police officers as pimp like. Rather, the metaphor applies to entire law enforcement institutions, whose structures and norms facilitated state exploitation of sex workers.
At least three meanings of the word reduction have been theorized by philosophers: epistemic, ontological, and methodological reductions. In this article, I suggest a fourth meaning to complement the literature: the axiological meaning. Theorizing reduction as an epistemic value refers to the normative pull that reduction sometimes has on scientific reasoning. The example of genetic reductionism in evolutionary biology shows that in cases of underdetermination of theory by evidence, reduction can influence theory acceptance just like other values do. I suggest that reduction, in this context, is involved in a value trade-off that also features parsimony and explanatory power.
The green bug aphid, Schizaphis graminum, is one of the most serious pests of wheat which cause considerable yield loss in wheat fields. At present, beneficial microorganisms such as plant growth-promoting rhizobacteria (PGPR) need to be incorporated into wheat production to diminish the high risk of heavily insecticide application for environment and health hazards. This study aimed to assess the influence of several PGPR strains, Pseudomonas geniculata, Azospirillum oryzae, Pseudomonas brassicacearum, and Azotobacter chroococcum, applied as seed treatments of wheat, on the life table parameters and foraging behaviour of the green aphid, S. graminum. We investigated the physiological and biochemical responses of wheat plants under aphid stress to elucidate the induced resistance conferred by PGPRs. Preference tests revealed that plants treated with A. chroococcum were the least favoured by aphids at 24 h post-infestation. Furthermore, biological parameters of the aphids exhibited significant variation across treatments, with the highest values recorded in the control group and the lowest in plants treated with A. chroococcum. The intrinsic rate of increase (rm) of the aphids was diminished following the application of PGPR, with the lowest rm observed in the A. chroococcum treatment. The highest concentrations of proteins, carbohydrates, total phenols, and antioxidant enzymes were detected in infested plants treated with A. chroococcum 72 h post-infestation. According to our results, A. chroococcum emerged as the most effective treatment for enhancing both antixenosis and antibiosis resistance in wheat against S. graminum, suggesting its significant potential for integration into pest management strategies in wheat cultivation.
We show that vortex rings forming in suspensions and polymer solutions exhibit similar behaviour in terms of vortex-core growth, vorticity redistribution and circulation when compared at loadings (i.e. volume fraction in suspensions and concentration in polymer solutions) normalised by their respective critical loading. This suggests that the collective, loading-driven dynamics of dispersed particles or polymer chains can outweigh the unique characteristics of the dispersion and govern certain aspects of the flow response. Using a confined vortex ring as a canonical structure, we synthesise experimental data spanning dilute to concentrated regimes for both media, with our analysis indicating that similar collective dynamics exist in both systems. Specifically, the vortex-core growth rate relative to the unloaded case increases approximately linearly with normalised loading while circulation remains nearly unchanged over the measured parameter range. Shared collective dynamics are further suggested by radial vorticity profiles scaled according to loading, which reveal structural markers that align along consistent non-dimensional radii, demonstrating a topological self-similarity between flow fields despite fundamentally different disperse phases. Turbulent kinetic energy trends expose the limits of this correspondence: with increasing Reynolds number, turbulence rises in suspensions but remains largely unchanged in polymer solutions, reflecting differences in how semi-rigid particles and flexible chains interact with small-scale fluctuations. Altogether, these results uncover shared collective dynamics and support the cautious use of polymer analogues to study suspension flows within an equivalent loading regime. However, the limited test matrix motivates further experiments involving different flow media to assess the generality of these findings.
Public schools in Dearborn, Michigan, experienced increased enrollment of students of Arab descent during the 1980s and 1990s. While social, political, and personal contestation accompanied this demographic shift, the experiences of Arab American students in Dearborn revealed a spectrum of acceptance and rejection of American values among communities of Arab descent. As the presence of Arab-descendant youth increased, public schools shifted from emphasizing assimilation to becoming more accepting of cultural pluralism. This shift developed through a reciprocal process in which Arab-descendant students and their adult allies demanded respect for their multifaceted linguistic, religious, and ethnic identities even as they refashioned conceptions of who they were through acculturation. By illuminating Arab and Muslim students’ school experiences amid heightened geopolitical tensions, this article complicates prevailing narratives about Arab American identity formation. Additionally, its examination of youth identity formation in relation to geopolitics, religion, nationality, race, and gender broadens understandings of schooling and identity formation within the United States.
One of the main challenges in simulating high Reynolds number (${\textit{Re}}$) turbulent boundary layers (TBLs) is the long streamwise distance required for large-scale outer-layer structures to develop, making such simulations prohibitively expensive. We propose an inflow generation method for high ${\textit{Re}}$ wall turbulence that leverages the known structure and scaling laws of TBLs. Pre-multiplied spectra of streamwise velocity show that with an increase in ${\textit{Re}}$ the outer region grows and occupies more of the spanwise wavenumber space in proportion to the increase in ${\textit{Re}}$, while the inner region remains approximately the same. Exploiting this behaviour, we generate inflow conditions for a target ${\textit{Re}}$ by starting from cross-stream velocity slices at a lower base ${\textit{Re}}$. In spectral space, we identify the inner- and outer-region wavenumbers, and shift the outer-region components proportionally to the desired ${\textit{Re}}$ increase. We examine the capability of this method by scaling velocity slices at ${\textit{Re}}_\theta =2240$ and 4430 to ${\textit{Re}}_\theta =8000$, and using them as inflow conditions for direct numerical simulations of TBLs growing in the range $ {\textit{Re}}_\theta =8000-9000$, with ${\textit{Re}}_\theta$ being the Reynolds number based on the momentum-loss thickness $\theta$. The predicted skin friction coefficient and shape factor, regardless of the base $ {\textit{Re}}_\theta$ tested, lie within $\pm 3.5\,\%$ and $\pm 0.5\,\%$, respectively, of that of a precursor simulation right from the inlet. Reynolds stresses match very well after approximately $8\,\delta _{99_0}$. The development length in terms of the Reynolds stresses is approximately $8\delta _{99_0}$, where $\delta _{99_0}$ is the boundary layer thickness at the inlet. This gives an order of magnitude reduction in development length compared with other methods proposed in the literature.
The public release of OpenAI’s generative artificial intelligence (GenAI) chatbot ChatGPT in November 2022 was, in the jargon of political science, a “critical juncture” in which AI’s potential was made manifest to ordinary people. Following the initial enthusiasm, however, came a strong undercurrent of skepticism about the human costs of AI advances. In 1958, Hannah Arendt presciently observed:
The modern age has carried with it a theoretical glorification of labor and has resulted in a factual transformation of the whole of society into a laboring society. The fulfilment of the wish, therefore, like the fulfilment of wishes in fairy tales, comes at a moment when it can only be self-defeating. … What we are confronted with is the prospect of a society of laborers without labor, that is, without the only activity left to them. Surely, nothing could be worse.1
This study explored emergency nurses’ lived experiences and perceived challenges during the triage process.
Methods
This qualitative study was conducted with 25 emergency department nurses at Atatürk University Research Hospital. Criterion sampling was used to include nurses with direct triage experience. Data were collected through face-to-face, semi-structured interviews and analyzed using Colaizzi’s descriptive phenomenological method. Significant statements were extracted, meanings were formulated, and these were organized into theme clusters. To enhance credibility, 2 researchers conducted the analysis independently, and a consensus was reached through discussion.
Results
Four main themes, 10 sub-themes, and 35 codes were identified. Nurses reported multiple challenges, including lack of institutional support, high patient load, time pressure, and patient dissatisfaction. Decision-making was influenced by both environmental and individual factors. Triage assessment involved a combination of subjective judgment and objective tools. Common errors included misdirection and insufficient questioning. Nurses also suggested improvements related to staffing, training, and organizational conditions.
Conclusions
Triage was experienced as a complex and demanding process shaped by workload, time pressure, and limited support. Findings highlight the importance of organizational and contextual factors in shaping triage practices.
Following pressure from investors, Congress passed the 1976 Foreign Sovereign Immunities Act (FSIA) to facilitate lawsuits by nonstate commercial actors against sovereign states in US courts. This legislation redefined sovereign debt as a commercial activity, seemingly favoring creditors. Yet case outcomes proved variable. While the FSIA established clear procedural guidelines, judicial discretion remained, raising questions about what factors influence outcomes. How deep is the effect of judges’ partisan leanings? To what extent does a left–right divide exist in this issue area? Although sovereign debt of other countries rarely sparks US political debate, I argue that partisan influence persists in these cases, particularly when defendants are democracies. Republican-nominated judges consistently apply the FSIA’s pro-creditor framework regardless of defendant characteristics, reflecting their party’s historical support for transnational commercial actors and contract enforcement. Democratic-nominated judges, however, exhibit conditional deference: when democracies demonstrate fiscal restraint before defaulting—signaling genuine economic distress—Democratic-nominated judges more readily defer to the sovereign defendant within the FSIA’s constraints. When democracies maintain high government consumption while defaulting, suggesting strategic choice rather than necessity, Democratic-nominated judges enforce more strictly. By contrast, both Democratic- and Republican-nominated judges converge on pro-creditor positions when adjudicating autocratic defaults because the absence of credible fiscal signals eliminates conditions for conditional deference. I test this argument with an original data set of sovereign debt litigation cases brought to the United States from 1977 to 2022.
Autistic people are at an elevated risk of premature mortality; however, few studies have identified factors that explain this association. Co-occurring psychiatric conditions are a strong candidate, given that autistic people are at a high risk of such conditions and these conditions are broadly associated with premature mortality.
Aims
We aimed to investigate the degree to which co-occurring psychiatric conditions are associated with premature mortality in autistic people. We explored these associations across sex and co-occurring other neurodevelopmental conditions.
Method
We conducted a cohort study based on registry linkage. We identified 2 958 317 individuals born in Sweden from 1974 to 2004, including 70 546 (2.38%) individuals with an autism diagnosis. We identified diagnoses of 13 psychiatric conditions. The cohort was followed up from age 16 to age 46 at the oldest. We compared the risk of mortality (from all-causes, suicide, other external causes and natural causes) across autistic people with psychiatric conditions and (a) non-autistic people without psychiatric diagnoses; (b) autistic people without psychiatric diagnoses; and (c) non-autistic people with psychiatric diagnoses. We conducted separate analyses by sex and co-occurring neurodevelopmental conditions.
Results
The mortality rate in autistic people with psychiatric conditions was 3.2 deaths per 1000 person-years, which was higher than that observed in non-autistic (0.27 deaths per 1000 person-years) and autistic people without psychiatric conditions (0.96 deaths per 1000 person-years). The relative risk of premature mortality was higher in autistic people with psychiatric conditions compared with both non-autistic (hazard ratio 13.85, 12.86–14.91) and autistic people (hazard ratio 3.44, 2.94–4.02) without psychiatric conditions and also exceeded the risk of premature mortality in individuals with psychiatric conditions alone (hazard ratio 1.47, 1.37–1.58). Similar patterns emerged across sex, intellectual disability and attention-deficit hyperactivity disorder.
Conclusions
Co-occurring psychiatric conditions are a risk factor for premature mortality in autistic people. Timely detection and treatment of such conditions in autistic people may facilitate healthier, lengthier lives for autistic people.