Quebec is Canada’s leading producer of lowbush blueberries (Ericaceae), a crop reliant on honey bees (Hymenoptera: Apidae) for pollination. Intensive pollination services may adversely affect bee health. Few studies have examined the impact of increasing colony density and its carryover effects. This study compares control colonies used for honey production with colonies placed at two pollination densities (2.5 and 5 colonies/ha) in Saguenay–Lac-Saint-Jean over two years (2022–2023). Colonies were assessed at the start and end of pollination and one month later. We evaluated colony strength, Varroa destructor (Mesostigmata: Varroidae) infestation, pathogen loads (including Vairimorpha spp. (Nosematidae), and viruses such as deformed wing viruses A and B (Iflaviridae) and acute bee paralysis virus, Israeli acute paralysis virus, Kashmir bee virus, chronic bee paralysis virus, and black queen cell virus (all Dicistroviridae), and pesticide residues. Pollination was associated with reduced colony strength gain, higher proportions of colonies infested with Varroa, and increased deformed wing virus B loads. Colony strength was most affected by increased density in the carryover assessment. No pesticide levels exceeded bee toxicity thresholds in nectar and bee bread. This is the first study to evaluate colony density effects on honey bee health in lowbush blueberry systems.

Considérons l’énigme qui émerge des principes suivants : (A) Le chagrin de deuil n’est rationnellement approprié que si l’être perdu a été précédemment aimé par celui qui éprouve le chagrin ; (B) Dans un contexte de funérailles, le sujet collectif endeuillé n’a pas aimé précédemment l’être perdu. Cela mène à l’inférence (C) : Si (A) et (B), alors le chagrin de deuil collectif n’est pas rationnellement approprié. Cet article examine comment une émotion collective peut correspondre à une réalité structurelle du groupe en contexte funéraire tout en étant dénuée de fondements rationnels.

This paper examines the stability of Couette flow in the two-dimensional incompressible magnetohydrodynamics system with only vertical dissipation. Our analysis departs from previous works by avoiding coordinate transformations and instead exploiting the special structure of the magnetic stream function. A key point is that the equation for the magnetic stream function $\phi$ avoids unfavourable linear terms present in the magnetic field formulation, which allows us to uncover new stability mechanisms specific to the anisotropically dissipative regime. Making use of this special structure, we establish global uniform regularity of solutions near background magnetic fields and provide a rigorous resolution of the associated stability problem.

This article uses the idea of “fugitive science” to show how early twentieth-century writers and editors in colonial Freetown, Sierra Leone, repurposed eugenic ideas in their efforts to reform the British Empire. In the pages of West Africa’s most widely read newspaper, the Sierra Leone Weekly News, West African authors and editors reinterpreted eugenics to articulate political claims indirectly in the absence of substantive political power. They reworked transatlantic medical texts to cast local conditions of infant mortality as evidence of African racial degeneration under colonial rule in order to expose the contradictions of the ideology of sexual paternalism legitimizing imperial administration. These commentaries weaponized eugenics to frame polygyny as evidence of African paternal authority and political legitimacy. Some of these contributors transformed such sexualized discourse into organized politics when they formed the National Congress of British West Africa, which carried these claims into its 1920 meeting with the League of Nations.

In 1946, the Yugoslav socialist state broke-up all its institutional ties with religious communities entitled to set their own rules of self-governing that they had never had before. Furthermore, Yugoslav legislation of the time provided no specific requirements for official recognition of religious communities, which henceforth became equal in their rights and duties. The hypothesis of the article is that this apparently benevolent state attitude might have had a less evident political purpose that could be disclosed through an in-depth analysis of a legal framework of religious freedom in post-war Yugoslavia and a long-term political agenda of its socialist government: if this socialist secularism released the religion communities from state supervision, it also boosted separatist and dissident movements within them. The law made churches free, but weaker due to being subject to competition and extortion. By focusing on the evolution of Serbian Orthodox Church self-governing during socialism, the article examines the impact of formally neutral state legislation on internal ecclesial conflicts – primarily those over autocephaly of the Macedonian Church, but including also the case of the independent Priests’ Alliance contesting episcopalian authority – that resulted in transformation of a once decentralized and democratic Serbian Orthodox Church into the present-day oligarchic one.

A mass- and momentum-conserved secondary injection model (MMC-SIM) is presented for thrust vector control (TVC) analysis in axisymmetric nozzles. TVC modelling provides fast thrust vector predictions for control design, preliminary nozzle sizing, and integration into flight simulation frameworks. Existing low-order models rely on simplifying assumptions regarding the secondary jet exit state, which limits reproducibility and can compromise predictive accuracy. MMC-SIM addresses this limitation by reformulating the equivalent obstruction height problem. Mass conservation and momentum conservation provide two independent constraints that are solved simultaneously to determine both the effective injection height and the secondary jet exit state, eliminating the need to prescribe downstream jet conditions a priori. These constraints are embedded within a blunt-body framework to predict boundary layer separation, wall pressure distribution and thrust vector characteristics. Computational fluid dynamics (CFD) simulations are used to assess the modelling assumptions and examine the flow structures. MMC-SIM shows strong agreement with experimental results, yielding average and maximum lateral force prediction errors of 3.3% and 4.8%, respectively. Compared to current leading models, MMC-SIM substantially improves the prediction of the pressure-driven lateral force while providing a transparent and reproducible modelling framework suitable for engineering design applications.

We prove a version of Morel’s unstable $\mathbb {A}^1$-connectivity theorem over arbitrary base schemes. In the stable setting, this recovers (and simplifies the proof of) the known connectivity bounds due to Morel, Schmidt–Strunk, Deshmukh–Hogadi–Kulkarni–Yadav, and Druzhinin, and extends them to possibly non-noetherian schemes. Using the recent work of Bachmann–Elmanto–Morrow, this also implies that the slice filtration on homotopy K-theory is convergent for qcqs schemes of finite valuative dimension.

Bien que Marcel Conche jouisse d’une certaine notoriété pour ses travaux exégétiques, on ignore trop souvent sa pensée propre, en particulier sa métaphysique de la Nature. Pourtant celle-ci est d’un grand intérêt en ce qu’elle propose une issue à l’antinomie classique du matérialisme et de l’idéalisme. Ni matière inerte obéissant à des lois impersonnelles, ni organe d’un esprit transcendant ou transcendantal, la Nature se présente chez Conche comme « Poème vivant », c’est-à-dire comme spontanéité créatrice. L’objectif du présent article est de mieux définir le sens de cette voie tierce et d’en situer l’originalité au regard de ses précurseurs historiques.

X-wing unmanned aerial vehicles (UAVs) possess the unique capability to perform both bank-to-turn (BTT) and skid-to-turn (STT) manoeuvres by combining lift-vector tilting with sideslip-induced lateral force generation, thereby offering superior manoeuvrability compared with conventional fixed-wing platforms. In this study, a high-fidelity numerical investigation of X-wing manoeuvring performance is conducted using a six-degree-of-freedom (6-DOF) flight-dynamics model integrated with validated aerodynamic coefficients generated from USAF Digital DATCOM. The coupled effects of front-wing and rear X-tail anhedral–dihedral angles are systematically examined under both calm and crosswind conditions. The results indicate that increasing the combined angles significantly enhances lateral control authority and reduces the turning radius during STT manoeuvres, albeit at the expense of increased trajectory oscillations and heightened sensitivity to wind disturbances, whereas BTT manoeuvres exhibit comparatively smoother and more robust behaviour in crosswind environments. To further isolate the underlying physics, a dedicated roll- and yaw-control verification framework is developed to distinguish intrinsic aerodynamic characteristics from controller-induced effects, revealing distinct mechanisms for crosswind compensation. In addition, target interception simulations demonstrate that larger anhedral–dihedral angles improve interception performance, with the 90° configuration reducing interception time by approximately 16% and the minimum target separation distance by nearly 94%. Overall, this study elucidates the coupled aerodynamic–control mechanisms governing X-wing manoeuvrability and provides quantitative guidelines for the design of high-agility, wind-resilient UAV systems.

Naproxen is a widely used nonsteroidal anti-inflammatory drug, and previous studies have shown that its administration in mice influenced antral follicle growth and ovulation. Therefore, the present study aimed to investigate the reversibility of these effects following treatment interruption and to evaluate their impact across different mouse backgrounds. For Experiment I, C57BL/6 females (n = 20, 6 weeks of age) were treated with 10 mg/kg (low, n = 7) or 50 mg/kg (high, n = 7) of naproxen, while animals of the vehicle group received PBS + DMSO 5% (n = 6), followed by 21 days of rest. After euthanasia, the ovaries were histologically analysed. For Experiment II (C57BL/6) and Experiment III (Swiss and BALB/c), animals were treated for eight days with the same protocol, receiving 20 IU of eCG and 20 IU of hCG for ovulation induction. Recovered oocytes were collected and quantified. Results demonstrated that the treatment affected the percentage of primary follicles, which increased in the high-dose group compared with the vehicle group. Additionally, the rate of antral follicles was higher in the high group than in the vehicle and low-dose groups. The number of ovulated oocytes was not altered in BALB/c and Swiss females, as well as the number of corpora haemorrhagica and corpus luteum (p > 0.05). Overall, our findings indicate that naproxen treatment may have transient effects on folliculogenesis in C57BL/6 mice, with no impact in BALB/c or Swiss mice.