This paper examines Summermood (1981), an electroacoustic work composed by Antonio Russek for bass flute and live electronics, situating it within the Mexican electroacoustic scene of the 1980s and in dialogue with international developments in live electronic performance. A pivotal work in both Russek’s career and flutist Marielena Arizpe’s repertoire, Summermood, stands among the earliest Mexican compositions for electronically modified acoustic instruments. It has not been able to be studied or performed due to the absence of published documentation, its dependence on the obsolete DeltaLab DL-4 digital delay unit, and its original association with Arizpe, who retired early following an accident-related injury. Drawing on archival documents, interviews, recordings and the graphic score and Russek’s notes, this paper analyses the work’s aesthetic conception, its integration of extended flute timbres with electronic processing, its graphic notation and the collaborative practices that informed its creation, arguing for its significance in the historiography of Mexican electroacoustic music. While briefly acknowledging the preservation challenges posed by obsolete technologies, the central aim of this paper is to reassemble Summermood as a case study that illuminates Mexico’s underexplored contribution to the global avant-garde of the late twentieth century.

The tree Xylopia decorticans is a rare endemic in the Brazilian Atlantic Forest, a global biodiversity hotspot. Described in 2007 from two protected areas, it was originally categorized as Least Concern but as a result of progressive forest conversion and degradation it is now categorized as Endangered in the Brazilian Red List and IUCN Red List. Ecologically, the search for new populations is important because the species provides resources to a range of wildlife in different forest layers, but there have been no demographic studies on which to base conservation action. To address this lack of information, we surveyed a private protected area in south-eastern Brazil where there was a new record of X. decorticans. We located 121 individuals within a minimum convex polygon area of 4.08 ha (density 29.65 individuals/ha), c. 30% of which were juveniles. Mean tree height was 9 m and diameter at breast height ≤ 10 cm. The species is ombrophilous and sensitive to edge effects, as evidenced by desiccation observed in the field. The findings of this study improve our understanding of the ecological characteristics of species within regions afflicted by ongoing forest degradation, and underscores the pivotal role of Reservas Particular do Patrimônio Natural (private natural heritage reserves) in Brazil in the conservation of threatened species such as X. decorticans.

Research on partisan expressive responding suggests that the beliefs people express in surveys are more partisan than their underlying perceptions. This article examines the scope and importance of expressive responding through a meta-reanalysis of 44 studies from 25 articles. On average, treatments designed to reduce expressive responding shrink measured partisan bias by about 25%. Across the 242 survey questions in the data, treatments increase the correlation between the average Democrat’s and Republican’s beliefs from 0.81 to 0.86. Contrary to expectations derived from the two leading theories of expressive responding, misreporting (“cheerleading”) and congenial inference, there is no evidence that expressive responding increases in partisan identity strength or educational attainment. As research on expressive responding enters its third decade, greater emphasis on design-based tests of mechanisms may help build a firmer understanding of the nature and substantive importance of expressive responding—namely, whether the forces that produce expressive responding in surveys also shape real-world political judgments.

In 2002, the director of the Jindo Cultural Center learned of Waedeoksan, a tomb site said to commemorate Japanese naval soldiers who died in the 1597 Battle of Myeongnyang. Oral tradition framed the burials as an act of virtue toward foreign dead and remained confined to Jindo for centuries. After the discovery of a genealogical reference, the story gained attention and was mobilized as a symbol of Korea–Japan reconciliation, prompting a visit from a Japanese prime minister. In 2022, however, a historian challenged its archaeological basis, sparking debate. This article traces competing narratives and shows how the tradition became sensitive.

Social salience, the association of a social category with linguistic variables, has been hypothesized to be an important driver of language change. This hypothesis has not been rigorously tested due to the lack of a reliable measure of social salience. In this paper, we present Salience Categorization Test (Sali-CAT), a new approach to measuring the association of word variants with social categories across multiple lexical variables. The approach includes a customized experimental paradigm (three alternative forced choice) and a statistical method to establish the baseline Salience Ratio (Sali-RAT) score for word variants that do not have a bias in usage with respect to the social categories. We demonstrate the approach by testing the association of multiple variables with different generations of speakers in the Gurindji speech community.

For any power q of the positive ground field characteristic, a smooth q-bic threefold—the Fermat threefold of degree $q+1$, for example—has a smooth surface S of lines which behaves like the Fano surface of a smooth cubic threefold. I develop projective, moduli-theoretic, and degeneration techniques to study the geometry of S. Using, in addition, the modular representation theory of the finite unitary group and the geometric theory of filtrations, I compute the cohomology of the structure sheaf of S when q is prime.

The goal of the Paris Agreement is to prevent global temperatures from rising by more than 2°C above pre-industrial levels and pursue efforts to limit them to 1.5°C above pre-industrial levels. This requires a significant reduction in global greenhouse gas emissions and achieving net zero emissions by 2050. Portfolio alignment metrics are forward-looking metrics intended to help investors understand whether their investment portfolios are on track to meet the Paris Agreement goals. They also aim to encourage capital flows towards activities needed for a net zero transition. Since 2020, several metrics have been put forward by industry groups and explored in technical papers. Companies and actuaries have been exploring the practicalities of these metrics and starting to incorporate them into investment reporting and design. But this has not been without key challenges. The Net Zero and Implications for Investment Portfolios working party aims to help actuaries improve their understanding of what net zero means for an investment portfolio and what the key mechanisms are to achieve this, as well as key challenges to date and the outlook for development.

Private investment in residential long-term care has surged around the world. Growing evidence shows that this is changing the institutional logic and the inner workings of the sector, prioritising the financial interests of asset holders above those of other stakeholders (eg. clients, care professionals and regulators). We know little about how policy makers and regulators are responding to private investment and profit-making in the long-term care sector. This paper addresses that gap by analysing policies prompting the growth of private investment and profit-making in residential long-term care, the emerging power struggles in some cases between asset holders and other stakeholders in long-term care, the controversies that have arisen and the concomitant responses of regulators and policy makers in Ontario (Canada), Lombardy (Italy), the Netherlands and England (United Kingdom). We show that the institutional context (eg. legal frameworks, policies and regulations) shapes controversies concerning quality, accessibility and affordability of care, and argue that regulators and policymakers in the constituencies we studied are responding reactively to such controversies rather than proactively anticipating and preventing unwanted effects. Our analysis provides policymakers with valuable insights regarding the regulation and governance of private investment and profit-making in the residential long-term care sector.

Over the next decade, I expect more and more computing on phones and small computers and less on clouds and supercomputers. Supercomputers are super impressive to engineers, but not to economists because economies of scale have more to do with the size of the market than the size of the machine. Clouds are like wire-wrapped Cray computers; they were never designed for mass production. There was never much supply or demand. Supercomputers and clouds are too expensive and burn too much power. The future is more promising for phones because the market is larger. In addition, there are a number of other advantages to computing on phones and small (commodity) machines designed for mass markets: privacy, power, size, weight, latency, bandwidth, and especially affordability.

We prove a version of Sylvester’s law of inertia for the Reflection Equation Algebra (=REA). We will only be concerned with the REA constructed from the R-matrix associated to the standard q-deformation of $GL(N,\mathbb {C})$. For q positive, this particular REA comes equipped with a natural $*$-structure, by which it can be viewed as a q-deformation of the $*$-algebra of polynomial functions on the space of self-adjoint N-by-N-matrices. We will show that this REA satisfies a type I-condition, so that its irreducible representations can in principle be classified. Moreover, we will show that, up to the adjoint action of quantum $GL(N,\mathbb {C})$, any irreducible representation of the REA is determined by its extended signature, which is a classical signature vector extended by a parameter in $\mathbb {R}/\mathbb {Z}$. It is this latter result that we see as a quantized version of Sylvester’s law of inertia.

This article explores how ancient Greek choral practices—collective singing and dancing called choreia—offer unexpected solutions to contemporary civic challenges. Drawing on interdisciplinary research with Australian military veterans and students, combining cognitive science, performance studies, and classics, we demonstrate how synchronized group performance generates measurable and lasting improvements in empathy, social cohesion, and democratic participation. Using motion capture technology and psychological assessments, we reveal the neurological and social mechanisms underlying these transformations and the means to reactivate them even after profound disagreements. The research suggests that ancient Greek democracy’s emphasis on embodied, collective practices provides valuable insights for addressing modern crises of political polarization and civic disengagement, demonstrating how democracy can be literally danced into being.

Biodiversity monitoring is essential to inform the state of wildlife populations, and the impacts of environmental change, conservation intervention, and sustainable development policies and actions. We review the current state of bird monitoring across Africa using public questionnaires and semi-structured interviews. We received 87 questionnaire responses from 46 (of 54) countries and, additionally, 24 in-depth interviews were carried out. Multiple data collection methods were reported with total counts of individuals being most frequent, but all-species surveys, essential for quantifying ecosystem health, were restricted to bird atlases and Common Bird Monitoring (CBM) projects in Kenya, Uganda, and Botswana. Data collection relied largely on volunteers, but their motivation, recruitment, training, and retention is a continuing challenge. The most sustainable programmes were driven by clear policy objectives (e.g. waterbird monitoring under the Ramsar Convention or the Convention on the Conservation of Migratory Species), monitoring of individual groups (e.g. raptors, vultures, bustards), specific threatened species, and where clear national priorities had been set within government agencies. Use of monitoring data by governments in country biodiversity reports or National Biodiversity Species Action Plans (NBSAPs) varied widely and, for many countries, simply did not exist. A lack of skilled analysts and a comprehensive approach to data curation and ownership were identified as major limitations. A more strategic approach to funding and monitoring is needed, whereby smaller funders collaborate to reduce costs associated with applying for small amounts of money, and bird (and biodiversity) monitoring is explicitly integrated with sustainable development goals to exploit broader funding streams.

Extropy-based divergence measures offer distinct advantages over entropy-based counterparts, owing to their mathematical simplicity and enhanced interpretability. Relative extropy by Lad et al. [5] is a symmetric divergence measure between two probability distributions, and Mohammadi et al. [8] introduced the asymmetric divergence between two distributions based on extropy. We further study these measures, their properties, and interrelationships in this article. To address the divergence between truncated lifetime distributions, we define dynamic relative extropy for residual and past lifetime scenarios. Exploring the interrelationships of dynamic cases of relative extropy, extropy divergence, and extropy inaccuracy, we derive some unique properties and characterizations for the exponential distribution. A nonparametric estimator for relative extropy is developed, and its performance is assessed through numerical simulation studies. The practical applicability of relative extropy is used to analyze the divergence in lifetime patterns of mice under a lifetime feeding experiment and the shopping patterns of customers based on age and income groups. Further, the application of relative extropy is also applied to find the dissimilarity between two images.

Many Indigenous nations in the settler state of Canada have two governments: elective band councils and a customary leadership not subject to regular elections. When these groups struggle for authority, outsiders often side with the band councils on the assumption that elections are necessary for a government to be democratic. But this assumption reflects an unwarranted electoral bias. In fact, non-elective customary governments can be more democratic than elected band councils. As we show, customary governments sometimes draw wider participation from Indigenous communities, and they can create responsiveness through non-electoral mechanisms that promote voice and exit. This gives Canada a democratic reason to promote Indigenous democratic innovation through policy and legal reforms that facilitate state recognition of customary governments.

Individuals with limb loss present significant challenges to testing and evaluating prosthetic devices, such as medical approval processes and participant availability. Prosthesis simulators, designed for mimicking prosthesis use with able-bodied individuals, offer an alternative to conducting controlled experiments and enhancing the development of prosthetic technologies. This review examines the design features, applications, and limitations of lower limb prosthesis simulators. A literature search identified 73 studies that have used lower limb prosthesis simulators. Most studies have focused on transfemoral prosthesis simulators (TFsims) and testing prosthetic designs and control mechanisms. The most frequently assessed movement was walking, while other movements, were explored only sporadically. The findings reveal significant variability in simulator configurations, training protocols, and the range of movements assessed. Additionally, a notable research gap exists in evaluations of the effect of transtibial prosthesis simulators (TTsims) and hip disarticulation prosthesis simulators (HDsims) on gait. Despite these challenges, prosthesis simulators offer promising potential for accelerating and improving prosthesis development while putting less stress on the relatively small target group of individuals with limb loss. Further research is needed to standardize methodologies and better understand the effects of simulator design and training on gait performance to facilitate advancements in prosthetic research.

In the Philippines, bans on the use of plastic bags have been enacted in 489 cities and towns as a means of stemming waste, while proposed legislation for a nationwide prohibition has been pending for several years. The national single-use plastic (SUP) ban is a significant step forward in mitigating plastic pollution and climate change, but it will have economic and employment impacts on firms and workers. This study fills in a gap by estimating the employment impact of a national ban using firm-level data from official surveys. An exploratory labour-centric methodology interrogates workers’ perceptions of a ban through interviews with unionists. The study finds the employment effect to be significant, as 32,000 workers in almost 500 SUP firms will be directly affected, and another 9.000 workers in the midstream plastic industry will be indirectly impacted. Workers have a range of opinions regarding a proposed ban – from opposition because of the expected layoffs to acceptance as a necessary solution to plastic pollution. However, support for a SUP ban is predicated on the existence of alternative employment for affected workers. The study reveals that workers are receptive to a message that integrates both environmental concerns and labour standards. However, there is a serious lack of information dissemination from plastic firms and government agencies about the proposed SUP ban and the necessary adaptation measures to prepare workers for a transition. The economic, sociocultural, and institutional barriers to an effective just transition for SUP workers are substantial but not insurmountable.

Project a Black Planet: Art and Culture of Panafrica was co-organized by the Art Institute of Chicago (AIC) and MACBA Museu d’Art Contemporani de Barcelona, in collaboration with KANAL-Centre Pompidou Bruxelles. The exhibition, held at the Art Institute of Chicago, ran from December 15, 2024 to March 30, 2025 and was curated by Antawan I. Byrd, Elvira Dyangani Ose, Adom Getachew, and Matthew S. Witkovsky. It was partly funded by the National Endowment for the Humanities (NEH), a relevant detail within the context of my viewing.

This article investigates the direct impact of energy prices (Crude Oil and Natural Gas) on agricultural markets (wheat, maize, soybeans) and the indirect effect through fertilizers using monthly data covering the period from January 1990 to February 2021. Additionally, the analysis is further extended up to 2024. The conditional covariances of energy and fertilizer prices capture the spikes in the 2008 crisis and the volatile time after, and the deterministic nonlinear Fourier trends eliminate the unit root problem. The results show that agricultural prices are affected directly by changes in energy prices and indirectly through fertilizer prices.

Johnsongrass [Sorghum halepense (L.) Pers.] is a highly invasive, persistent, and problematic perennial weed in Australian cropping systems; however, its germination ecology has largely been inferred from studies conducted outside eastern Australia, where environmental conditions differ markedly. This limits accurate prediction of emergence timing and optimization of management strategies. The objectives of this study were to characterize seed dormancy mechanisms and to quantify the germination and emergence response of two populations of S. halepense from central Queensland to temperature, light, salinity, osmotic stress, and burial depth under controlled conditions. Seeds from both populations exhibited strong primary dormancy, which was partially alleviated by sodium hypochlorite immersion and more effectively by mechanical scarification using sandpaper, indicating that seed coat–related dormancy is the principal barrier to germination. Temperature significantly influenced germination, with no germination at 15/5 C and high germination (>90%) at 25/15 C to 35/25 C under both light/dark and dark conditions, demonstrating that warm temperatures largely override light requirements. Germination declined steadily with increasing sodium chloride (NaCl) concentrations, and the NaCl concentration required to reduce maximum germination by 50% was approximately 173 mM. Moderate water stress −0.2 to −0.4 MPa produced less germination in comparison to the control, while −0.8 MPa greatly inhibited germination (11%). Emergence was highest from shallow burial depths of 1 to 4 cm and declined sharply beyond 8 cm. These results demonstrate that S. halepense recruitment occurs in a range of environmental conditions; however, environmental stresses or deep soil burial may help manage this weed. This study provides regionally relevant information to enhance emergence prediction and inform integrated weed management strategies in eastern Australian cropping systems.