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A new arbitrary Lagrangian–Eulerian (ALE) formulation for Navier–Stokes flow on self-evolving surfaces is presented. It is based on a general curvilinear surface parameterisation that describes the motion of the ALE frame. Its in-plane part becomes fully arbitrary, while its out-of-plane part follows the material motion of the surface. This allows for the description of flows on deforming surfaces using only surface meshes. The unknown fields are the fluid density or pressure, the fluid velocity and the surface motion, where the latter two share the same normal velocity. The corresponding field equations are the continuity equation or area-incompressibility constraint, the surface Navier–Stokes equations and suitable surface mesh equations. Particularly advantageous are mesh equations based on membrane elasticity. The presentation focuses on the coupled set of strong and weak form equations, and presents several manufactured steady and transient solutions. These solutions are used together with numerical simulations to illustrate and discuss the properties of the proposed new ALE formulation. They also serve as basis for the development and verification of corresponding computational methods. The new formulation allows for a detailed study of fluidic membranes such as soap films, capillary menisci and lipid bilayers.
A remarkable shift in climate change misinformation has taken over social media streams. The conversation is no longer totally absorbed with denying that climate change exists. Instead, the ‘New Denial’ is bent on condemning solutions to climate change and their supporters. Our study meticulously analyzed this shift, using extensive methods to untangle the content of over 200,000 Tweets from 2021 to 2023. We found that the New Denial is a heated political debate that often calls up common far-right arguments, falsely accuses climate solutions as ineffective and risky, and attacks climate solution supporters.
Technical summary
Over the past five years, a ‘New Denial’ has emerged in regards to climate change misinformation on social media. This shift marks a transition of the dominance of rhetoric centered around denial of climate change science to attacks that seek to undermine and cast doubt on proposed climate solutions and those who support them. While much of the academic literature to date has explored misinformation about climate science, there is a great need to explore this shift and seek out increased understanding of misinformation around climate change solutions specifically. In this paper, we employ a mixed-methods analysis, drawing on data from Twitter from 2021 to 2023, to analyze the content of climate solution misinformation. We find that the New Denial is frequently centered on politically-laden debates nestled in common narratives on the right, often attacking supporters of climate solutions as harbingering ulterior motives for climate solutions that are fundamentally flawed. We use these insights to reflect on targeted interventions for climate solution misinformation on social media.
Social media summary
A New Denial is sweeping social media, no longer bent on denying climate science. It's new target: climate solutions and the people pushing for them.
The shift to telework and hybrid arrangements has prompted organizations to reevaluate leadership competencies specific to remote environments. Therefore, we developed the Leadership Competencies for Telework (LCT) scale, designed for telework settings and addressing new challenges such as telework-life balance and virtual distance. The validation process included two studies: (1) Two content validity panels with 27 experts, and (2) validation of the 67-item scale through a survey of 543 Spanish teleworkers. Confirmatory factor analysis supported a five-factor structure: Digital Communication, Digital Trust-Building, Remote Goal Management, Remote Relationships Development, and Telework-Life Balance Support. The scale demonstrated high reliability (α < 0.90 for all factors) and validity, correlating with key outcomes such as job satisfaction, professional isolation, telework-life conflict, and organizational citizenship behaviors. The LCT scale provides organizations with a validated tool for assessing and developing effective telework leadership. Future research could validate the scale through longitudinal studies, exploring its predictive power over time.
Governments all over the world are struggling to control the spiralling costs of healthcare – the UK government is no exception. Its long-term strategy includes a much greater focus on prevention: to keep people as healthy and productive as possible for longer. This paper asks whether a greater focus on prevention is a possible lifeline for the National Health Service (NHS) as is often claimed, but it also examines other benefits to society. After considering various examples of prevention and the metrics used to measure their effectiveness, we use tobacco consumption as a case study to evaluate the costs to the public purse and to wider society. We give further examples, including obesity, but in less depth. We find that whilst there are significant benefits to public expenditure, including the NHS, in both cases, these are dwarfed by wider benefits to society both in terms of tangible economic benefits and improved well-being. We offer several suggestions for improving our understanding of the effectiveness of prevention policies in general and how the Actuarial profession can contribute to this debate.
Anningite-(Ce) ideally (Ca0.5Ce4+0.5)(VO4), was found within a phosphate coprolite from the sand-dominated sediments of the Gara Samani Formation, Algeria. As a tetragonal anhydrous vanadate, this mineral is classified in the xenotime group. It occurs in rock cavities and forms small (typically up to 100 μm in length) sheaf-like aggregates composed of crystals 30–40 μm in length and ∼7 μm in diameter. Anningite-(Ce) crystals are green with a vitreous lustre. No cleavage is observed and the fracture is uneven or conchoidal. Its empirical formula, calculated on the basis of 4 oxygen atoms, can be written as (Ca0.52Ce4+0.47Y3+0.01)Σ1.00[(VO4)0.88(PO4)0.05(SO4)0.06(SiO4)0.01]Σ1.00. The calculated density is 3.887 g/cm3. Anningite-(Ce) is tetragonal with space group I41/amd and unit-cell parameters a = 7.1500(4) Å, c = 6.3343(7) Å, and V = 323.82(5) Å3. Anningite-(Ce) is isostructural with wakefieldite-(Ce).
Cognitive impairment represents a central component of major depressive disorder (MDD), affecting a large proportion of people living with MDD and showing a consistent negative impact on social, interpersonal, and occupational functioning and subjective quality of life. Cognitive remediation (CR) is a training-based psychosocial intervention targeting cognitive performance and psychosocial functioning that has shown consistent evidence of effectiveness in individuals with schizophrenia and that could provide significant benefits also in people with MDD: this study aimed to assess the effects of a computerized CR intervention in adults living with MDD.
Methods
Participants recruited in this single blind multicentric randomized controlled trial were allocated to receive a computerized CR intervention delivered by an active and trained therapist or to an active control condition (computer games – CG). Outcomes were measured with validated instruments by blind assessors and included cognitive performance, depressive symptoms, and psychosocial functioning. Outcomes were assessed using mixed models for repeated measures, considering baseline and end-of-treatment scores.
Results
Hundred and one participants (CR=52 and CG=49) were included and 81 (CR=45 and CG=36) completed the study. CR produced superior results in clinician-rated depressive symptoms (p=0.023, d=042), global clinical severity (p=0.025, d=0.39), subjective depressive symptoms (p=0.005, d=0.45), working memory performance (p=0.004, d=0.34), executive functions/cognitive flexibility (p=0.020, d=0.43), and subjective cognitive impairment (p=0.006, d=0.48).
Conclusions
CR represents an effective intervention in MDD, improving clinical outcomes and cognitive performance in a clinician-rated and in a subjective manner, which should be more consistently implemented in clinical practice and included in MDD treatment recommendations.
The recent wave of executive orders and other actions at the federal level has received a great deal of attention in recent months. Receiving relatively less attention, however, has been ongoing efforts at the state level over the past couple of years to exercise more control over higher education. The present brief reviews recent state legislation impacting higher education with a particular focus on the recently enacted Ohio Senate Bill 1, as an illustrative example. We suggest that these state legislative efforts pose a threat to academic freedom through attacks on diversity, equity, and inclusion (DEI), curricular control, tenure, and faculty unionization. We provide an overview of these state legislative efforts and implications for I-O psychologists, particularly those in academia.
This brief piece addresses the dispute sparked by Donald Trump’s executive order denying birthright citizenship to two classes of people traditionally included under the citizenship clause of the Fourteenth Amendment. A primary goal is to provide a historical perspective on arguments made by both sides that are too frequently neglected in media coverage of the dispute. The piece does not predict how SCOTUS might rule, but it does make a case for the nation’s responsibility to children who have violated no law. Through textual and historical analysis, it also refutes two law professors who propose an originalist interpretation of the Fourteenth Amendment that supports Trump’s effort to deny birthright citizenship to children born to undocumented immigrants. Drawing on works of literature, this article hopes to clarify the consequences of the complicated legal issues involved, including the bigoted history of previous efforts to restrict birthright citizenship.
Employer attitudes towards maternity leave are often framed as a tension between opposition based on costs or ideal worker norms, versus normative or ethical support. How do employers combine and prioritise these justifications in practice? Drawing on interviews with thirty-seven British managers, this article develops a typology of employers – risk-averse, business-first, and value-driven – distinguishing the nature of support and underlying blends of economic, normative, and moral justifications. It shows how moral reasoning – often assumed to align only with a supportive stance – is also mobilised to justify exclusionary attitudes and even overt discrimination against maternity leave-takers. Further, against assumptions that shifting cultural norms and expanding rights foster greater employer support, discomfort with these changes can reinforce resistance. Relational dynamics also shape attitudes, with positive affective–personal ties between managers and staff prompting greater support. These findings offer a new lens on how family leave rights are interpreted in everyday managerial practice.
To analyze antibiotic prescribing trends and guideline concordance in outpatient settings using electronic health records (EHRs).
Design:
This quality improvement study utilized data from the Collaboration to Harmonize Antimicrobial Registry Measures (CHARM) database, which integrates antibiotic prescribing data extracted from the EHRs of various outpatient facilities.
Setting:
The study was conducted across 352 outpatient facilities in the United States.
Participants:
The study included oral antibiotic prescribing data from outpatient encounters from January 2021 to June 2023, encompassing 823,938 prescriptions.
Methods:
The primary outcomes were the rate of antibiotic prescribing per 1 000 prescription-related outpatient visits and identifying frequently prescribed antibiotics in adults and children. Secondary outcomes were the prescribing patterns for selected diagnoses and the concordance of these prescriptions with published guidelines.
Results:
The study estimated approximately a 20% increase in antibiotic prescribing per year, with an overall rate of 121.26 prescriptions per 1 000 prescription-related outpatient visits (95% confidence interval 121.01–121.50). Amoxicillin-clavulanate, amoxicillin, doxycycline, and cephalexin were most frequently prescribed. Sinusitis and otitis media were the most common reasons for prescribing antibiotics among adults and children, respectively. Less than 60% of sinusitis-related prescriptions were antibiotic concordant. Duration concordance rates were less than 70% for sinusitis, urinary tract infections, cellulitis, and Group A Streptococci. 51% of ciprofloxacin prescriptions were for patients aged 60 or older.
Conclusions:
The findings stress the need for strengthened antimicrobial stewardship in outpatient settings. The increasing rate of antibiotic prescriptions and discrepancies in guideline concordance reiterate the importance of ongoing monitoring and targeted interventions.
Fiber-based structured light including cylindrical vector beams (CVBs) and orbital angular momentum (OAM) has gained significant interest for its unique properties. In this work, we propose the concept of a programmable linearly polarized (LP)-mode synthesizer for general structured light generation, in which an LP-mode pool supporting independent and selectable LP-mode output is first established, and then different CVB/OAM modes could be generated in a general way through polarization and phase control. We demonstrate a proof-of-concept LP-mode synthesizer based on a fiber ring laser characterized by a partial five-LP mode weakly coupled few-mode fiber (FMF) cavity and an arbitrary LP-mode switch array. Various CVB/OAM beams including TE01, TM01, OAM±1 and OAM±2 modes are successfully generated. This approach provides new insights into mode manipulation methods, potentially enhancing the performance of optical quantum communications, optical fiber sensing and optical trapping applications.
This article surveys the recent literature on the politics of memory. It sets out the nature of research in this area over the last 25 years and distils its main trends and areas of focus. Investigating monographs and edited volumes published since the year 2000, it gives an overview of a rich and evolving area of study. It demonstrates the extent to which the increasing politicization and securitization of memory has started to underpin new strategies for political conflict with different groups on different levels using collective memory to assert identities. While the boundaries between the national and the transnational in studying the politics of memory are often blurred, the article broadly distinguishes between studying political conflict within and between states.
This paper draws upon the theoretical literature on migration policy and health, and empirical data on three European states with differing welfare models – Sweden (social democrat), France (conservative), and the United Kingdom (liberal) – during Covid-19, to highlight the often hidden and contradictory politics through which refugees, asylum seekers, and undocumented migrants were forced to navigate during the most uncertain period of the pandemic. Although migrants’ treatment during Covid-19 was generally better in Sweden with a social democrat welfare tradition, we see migration management priorities greatly undermining the extent to which welfare systems function overall for the benefit of population health. Furthermore, Sweden’s recent political shift to the right exacerbates those negative tendencies. As the paper shows, there was considerable effort by civil society and local government to fill the gap where national governments failed to protect this group, stepping in to provide health information, and support.
Many archaeologists recognize a need for a more proactive archaeology, one that is responsive to the goals of communities and so one that carries the potential to advance restorative justice and reclamation. But this work requires shifts in time and resources. Such high-investment community archaeology comes with unfolding developments, or cascade effects. We frame positive ones as including finding, honoring, elevating, and protecting cultural heritage and suggest these may offer those grappling with accommodating such shifts practical examples of the benefits. Our example comes from the Great Bay Archaeological Survey (GBAS) focused on colonial New Hampshire’s Great Bay Estuary/P8bagok (ca. AD 1600–1780). With years of community engagement in place, a landowner had heard of GBAS and stopped development when he noticed large stones. Here, we found an early colonial homestead site, the Meserve Garrison, and our attendant research traced out a trajectory of colonial expansion from Indigenous homelands transformed into English property, property into intergenerational wealth. With rising wealth came the dispossession of labor; GBAS found enslaved (freed) Africans lived in this rural northern New England frontier, a place not typically associated with chattel slavery. We are working to protect the site and publicly commemorate and restore an accurate, inclusive, colonial history.
Climate change and other anthropogenic stressors are reshaping Earth’s biodiversity, motivating efforts to monitor changing faunal diversity. Canada is home to 80 documented species of mosquitoes, 38 of which are reported in New Brunswick. Using Centers for Disease Control and Prevention miniature CO2 light traps, three adult mosquito collection surveys were performed to encompass 43 trapping sites across New Brunswick, Canada. Study one took place from 21 July 2022 to 9 September 2022, study two took place from 29 May 2023 to 24 October 2023, and study three took place from 15 May 2024 to 19 September 2024. Among the specimens collected, a total of 18 Uranotaenia sapphirina (Osten Sacken) (Diptera: Culicidae) were identified from five separate trapping sites. This species, previously documented only in Ontario, Quebec, and Manitoba, is considered rare in Canada and is known for its specialisation in feeding on annelids rather than vertebrates. Our detection of Ur. sapphirina in New Brunswick, where it has been absent in earlier surveys, suggests a recent range expansion, possibly driven by climate change. This observation highlights the need for ongoing surveillance to monitor the impacts of environmental changes on mosquito distribution.
We define the chain Sobolev space on a possibly non-complete metric measure space in terms of chain upper gradients. In this context, ɛ-chains are finite collections of points with distance at most ɛ between consecutive points. They play the role of discrete curves. Chain upper gradients are defined accordingly and the chain Sobolev space is defined by letting the size parameter ɛ going to zero. In the complete setting, we prove that the chain Sobolev space is equal to the classical notions of Sobolev spaces in terms of relaxation of upper gradients or of the local Lipschitz constant of Lipschitz functions. The proof of this fact is inspired by a recent technique developed by Eriksson-Bique in Eriksson-Bique (2023 Calc. Var. Partial Differential Equations62 23). In the possible non-complete setting, we prove that the chain Sobolev space is equal to the one defined via relaxation of the local Lipschitz constant of Lipschitz functions, while in general they are different from the one defined via upper gradients along curves. We apply the theory developed in the paper to prove equivalent formulations of the Poincaré inequality in terms of pointwise estimates involving ɛ-upper gradients, lower bounds on modulus of chains connecting points and size of separating sets measured with the Minkowski content in the non-complete setting. Along the way, we discuss the notion of weak ɛ-upper gradients and asymmetric notions of integral along chains.
Foundation models – models trained on broad data that can be adapted to a wide range of downstream tasks – can pose significant risks, ranging from intimate image abuse, cyberattacks, to bioterrorism. To reduce these risks, policymakers are starting to impose obligations on the developers of these models. However, downstream developers – actors who fine-tune or otherwise modify foundational models – can create or amplify risks by improving a model’s capabilities or compromising its safety features. This can make rules on upstream developers ineffective. One way to address this issue could be to impose direct obligations on downstream developers. However, since downstream developers are numerous, diverse, and rapidly growing in number, such direct regulation may be both practically challenging and stifling to innovation. A different approach would be to require upstream developers to mitigate downstream modification risks (e.g., by restricting what modifications can be made). Another approach would be to use alternative policy tools (e.g., clarifying how existing tort law applies to downstream developers or issuing voluntary guidance to help mitigate downstream modification risks). We expect that regulation on upstream developers to mitigate downstream modification risks will be necessary. Although further work is needed, regulation of downstream developers may also be warranted where they retain the ability to increase risk to an unacceptable level.
Discontinuous shear-thickening (DST) fluids exhibit unique instability properties in a wide range of flow conditions. We present numerical simulations of a scalar model for DST fluids in a planar simple shear using the smoothed particle hydrodynamics approach. The model reproduces the spatially homogeneous instability mechanism based on the competition between the inertial and microstructural time scales, with good congruence to the theoretical predictions. Spatial inhomogeneities arising from a stress-splitting instability are rationalised within the context of local components of the microstructure evolution. Using this effect, the addition of non-locality in the model is found to produce an alternative mechanism of temporal instabilities, driven by the inhomogeneous pattern formation. The reported arrangement of the microstructure is generally in agreement with the experimental data on gradient pattern formation in DST. Simulations in a parameter space representative of realistic DST materials resulted in aperiodic oscillations in measured shear rate and stress, driven by formation of gap-spanning frictional structures.