We prove a general convergence result for zeta functions of prehomogeneous vector spaces extending results of H. Saito, F. Sato and Yukie. Our analysis points to certain subspaces which yield boundary terms. We study it further in the setup arising from nilpotent orbits. In certain cases we determine the residue at the rightmost pole of the zeta function.

During 2021 through 2023, the golden mussel Limnoperna fortunei and freshwater fishes were sampled from 28 sites in the Tone River system, Japan, and adult trematodes of Dollfustrema were found in the fishes. Molecular and morphological analyses based on 28S rDNA and the ITS1−5.8S−ITS2 region revealed the trematode as ‘Dollfustrema hefeiense’, previously reported in Mainland China and likely introduced to Japan. Given that its scientific name was considered invalid, we re-described the species as Dollfustrema invadens n. sp. Additionally, the DNA-based survey helped clarify the trematode’s life cycle in the river system. A sporocyst and metacercariae were detected in the golden mussel’s visceral mass and in the muscles of two small freshwater fish species, respectively. The channel catfish Ictalurus punctatus harboured mature trematodes in its intestine, and adult trematodes were also found in the muscles of fishes infected with metacercariae, suggesting direct metacercariae development in fish muscle. Furthermore, another introduced bucephalid trematode, Prosorhynchoides ozakii, previously reported in the river system, was detected in the mussels and fishes. Moreover, co-infection of both bucephalid trematodes was observed in certain fishes.

We construct families of non-toric ${\mathbb {Q}}$-factorial terminal Fano (${\mathbb {Q}}$-Fano) threefolds of codimension $\geq 20$ corresponding to 54 mutation classes of rigid maximally mutable Laurent polynomials. From the point of view of mirror symmetry, they are the highest codimension (non-toric) ${\mathbb {Q}}$-Fano varieties for which we can currently establish the Fano/Landau–Ginzburg correspondence. We construct 46 additional ${\mathbb {Q}}$-Fano threefolds with codimensions of new examples ranging between 19 and 5. Some of these varieties are presented as toric complete intersections, and others as Pfaffian varieties.

This paper further studies the matroid realization space of a specific deformation of the regular n-gon with its lines of symmetry. Recently, we obtained that these particular realization spaces are birational to the elliptic modular surfaces $\Xi _{1}(n)$ over the modular curve $X_1(n)$. Here, we focus on the peculiar cases when $n=7,8$ in more detail. We obtain concrete quartic surfaces in $\mathbb {P}^3$ equipped with a dominant rational self-map stemming from an operator on line arrangements, which yields K3 surfaces with a dynamical system that is semi-conjugated to the plane.

Information on social media is characterized by networked curation processes in which users select other users from whom to receive information, and those users in turn share information that promotes their identities and interests. We argue this allows for partisan “curation bubbles” of users who share and consume content with consistent appeal drawn from a variety of sources. Yet, research concerning the extent of filter bubbles, echo chambers, or other forms of politically segregated information consumption typically conceptualizes information’s partisan valence at the source level as opposed to the story level. This can lead domain-level measures of audience partisanship to mischaracterize the partisan appeal of sources’ constituent stories—especially for sources estimated to be more moderate. Accounting for networked curation aligns theory and measurement of political information consumption on social media.

Authoritarian states are intensifying bloc-building efforts. While the authoritarian regionalism literature suggests that membership in these “clubs of autocrats” can bolster domestic support for authoritarian leaders, such external recognition can also pose challenges, especially when aligning with “toxic” authoritarian partners. We argue that authoritarian regimes attempt to solve this problem by crafting strategic narratives and communicating them through regime-loyal media to the general public. The study examines strategic narratives of bloc building used by Russia and China in the first year after the start of the full-scale war in Ukraine in 2022. Using “text-as-data” methods and qualitative analysis, we find important similarities and differences in the narratives of these two countries. Both use narratives highly critical of the United States and NATO. However, while Russia has crafted a “fortress narrative” that focuses on external threats and non-Western resilience, China promotes a “bridge narrative,” advocating for spanning geopolitical gaps and championing global integration. Both narrative strategies converge in their criticism of shared adversaries but diverge in their portrayals of the blocs they lead.

We develop an extensive mapping of the revolving door phenomenon by examining the work experience of 420,153 individuals in top corporate positions at 12,869 firms. More than half of these firms have at least one such individual with prior experience in one of 187 executive branch agencies. We find that firms are more likely to receive procurement contracts following the appointment of a former regulator transitioning within 2 years of leaving the agency, a result consistent with the “knowledge” hypothesis. Less-complex contracts signed following the appointment of former regulators are more likely to be renegotiated, increasing costs for the government.

Between 1817 and 1831, four German scientists – Karl von Martius, Georg Langsdorff, Ludwig Riedel, and Friedrich Sello – undertook expeditions in Brazil with the goal of collecting natural specimens, particularly focusing on Brazilian cinchona plants. Renowned for their medicinal properties, especially in the treatment of fever diseases, cinchona specimens were extensively utilized by local Brazilian communities. The widespread use of cinchona raises important questions regarding how German scientists acquired knowledge of the therapeutic properties of plants, previously unknown within German pharmacology. This paper argues that the German understanding of Brazil's cinchona trees was situated within an imperialist endeavor that not only appropriated indigenous knowledge but also involved conducting experiments on these plants and their effects on local populations. This hybridization of knowledge about cinchona was characterized by an asymmetrical dominance of German pharmacological experimentation, which sought to enhance organic life and establish utopian, “healthy” German societies, in both German territories and Brazil. Consequently, German chemical experiments with Brazilian cinchona specimens intersected with biopolitical practices, aimed at manipulating both plant and human life through therapeutic interventions.

Drag has a long history in the LGBTQ community as a means of political engagement, activism, protest, and community building. Today, drag is popular in the LGBTQ community and in the rest of society. At the same time, it is routinely a target of conservative backlash against the LGBTQ community. Despite drag’s inherently political nature, political science has failed to engage substantially with the influence of drag. This article offers a justification and research agenda to bring drag into the mainstream of political science.

Helminthiasis is a common infection in both humans and other animal populations and negatively affects the health of the host, causing a range of morbidity and even mortality, especially in young people and those with weakened immune systems. A variety of diagnostic procedures with a number of modifications are available to identify the sources of infection and to assess the epidemiological situation, the effectiveness of parasite control programs, anthelmintic treatment, and the prevention of drug resistance. These can be simple and cheap methods – for example, stool smear examination – or modern highly sensitive methods – for example, PCR analysis. This review attempts to summarize the advantages and limitations of each of these frequently used methods.

This paper seeks to challenge principles of culpability transfer as they appear in both criminal law and moral philosophy. I begin by discussing the legal doctrine of substituted mens rea, focusing on Section 33.1 of Canada’s Criminal Code. I argue that this doctrine violates the principle of contemporaneity, which there are sound philosophical reasons to accept. I then argue that the same reasons apply to tracing accounts of moral responsibility. Finally, drawing on the moral luck literature, I argue that cases of extreme intoxication are better analyzed in terms of harm-causation than culpability-transfer.

A famous theorem of Shokurov states that a general anticanonical divisor of a smooth Fano threefold is a smooth K3 surface. This is quite surprising since there are several examples where the base locus of the anticanonical system has codimension two. In this paper, we show that for four-dimensional Fano manifolds the behaviour is completely opposite: if the base locus is a normal surface, and hence has codimension two, all the anticanonical divisors are singular.

Research in digital transformation has focused on the challenges, determinants, or influencing resources, tools, and capabilities that enhance successful performance, innovation, competitive advantage, and internationalization. This paper discusses the process of digital transformation in the context of the footwear industry in Portugal, which is an interesting cluster of small and medium enterprises with a reported turnaround from traditional manufacturing targeting the domestic market to an innovative industry highly focused on export. The authors analyzed five important footwear companies ‘Made in Portugal’. The results show different stages of digital transformation, different levels of digital leadership, and different digital capabilities. The heterogeneous stage of digital maturity found has implications in the desired common positioning of the clustering-based brand ‘Portuguese Shoes’. The paper offers guidance for companies to align with the digital transformation requirements and respond to the global digital challenges, which can be transferred to other clustering industries and geographies.

“Gender ideology” rhetoric has diffused globally. Mobilized by a coalition of conservative actors, this discursive innovation helps to fuel the election of far-right politicians who scapegoat LGBTQ people, migrants, racial and ethnic minorities, and women as responsible for economic downturns as well as social and political disorder. This essay outlines the history and current landscape of gender ideology for political scientists and situates it in relation to the rise of far-right and authoritarian regimes globally. It builds on these political trends by concluding with a research agenda for scholars of LGBTQ politics to consider moving forward.

In this paper, the design and optimization of a circularly polarized antenna based on two crossed dipoles in phase quadrature for Global Navigation Satellite System (GNSS) wide band application has been investigated. The proposed design is single fed and relies on parasitic structures to achieve wide band coverage on the GPS standard bands L1 (1559–1610 MHz) and L5 (1164–1189 MHz). Full-wave simulations have been used to compute the radiation properties and the impedance of the antenna. A prototype was manufactured, and good agreement has been observed between the simulated results and measurement for both radiation pattern and reflection coefficient.

The antenna achieves a −10 dB impedance bandwidth of $56.97\%$ covering the band 1164–1610 MHz, and an axial ratio that covers the L5 band ranging between 7 dB and 2.8 dB from 1.164 GHz to 1.3 GHz while maintaining a value below 2.7 dB across the entire L1 band. The antenna occupies a volume of $\,99\, \,\times\,99\, \times 50$ mm3. It has been tested in real conditions during the 23rd French National Microwave Days (JNM) student competition. A GNSS signal receiver has been connected to the antenna. The antenna has been evaluated based on the number of connections it could achieve over a duration of 30 s.

This study evaluated the effects of capsaicin (CAP) supplementation on the intake, nutrient digestibility, ruminal fermentation, nitrogen balance, microbial protein synthesis and health traits of bulls managed on pasture. Eight crossbred (Holstein x Zebu) cattle averaging 313 ± 31 kg of body weight (BW) were arranged in a replicated 4 × 4 Latin square design (one square of four bulls, rumen fistulated with 4-inch silicone cannulas and one square of four non-fistulated bulls), which were kept on Pangola grass pasture (Digitaria decumbens). Each experimental period consisted of 21 days, with 7 days for data collection (no washout between periods). Bulls were randomly assigned to the following treatments: CON (control): concentrate supplementation at 0.5% live weight (BW) and no additive (CAPCIN®), or concentrate supplementation at 0.5% BW in association with CAPCIN® (NutriQuest, Campinas, Brazil) fed at the inclusion rates of 150 (CAP150), 300 (CAP300) and 450 (CAP450) mg/animal/day. Digestibilities of dry matter, organic matter and neutral detergent fibre showed quadratic responses to CAP supplementation. Rumen pH linearly increased with CAP supplementation. The numbers of lymphocytes and eosinophils were linearly increased with CAP supplementation. The use of encapsulated pepper in supplements of crossbred (Holstein x Zebu) bulls managed on D. decumbens pasture up to 450 mg/animal/day improves nutrients digestibility and ruminal fermentation and can positively influence the health status of beef cattle managed under tropical conditions.