Université Paris-Saclay

Convolution and square in abelian groups II

A critical value on an abelian group G of odd order d is a value λ such that the functional equation f ☆ f ( 2 t ) = λ f ( t ) 2 on G has a nonzero solution f . We construct many critical values by using abelian varieties with complex multiplication.

Ring Expansion of Benzothiaselenazole-1-oxides via Five-Membered Selenonium Ion-Mediated Alkene Insertion into Se–N Bonds

Abstract Ring expansion of heterocyclic frameworks provides an efficient approach to structurally diverse bioactive molecules, yet such transformations of organoselenium heterocycles remain largely unexplored. Herein, we report a calcium-catalyzed insertion of alkenes into the Se...

TMD factorization in diffractive heavy quark production in photon-nucleus collisions

A bstract Using the Colour Glass Condensate effective theory, we study the diffractive production of a massive quark-antiquark pair accompanied by a gluon in coherent photon-nucleus collisions at high energy. This partonic configuration provides the leading twist contribution to...

Research Study Attrition and Participant-Informed Retention Strategies Among Cancer Survivors

Importance Attrition in longitudinal cancer cohorts compromises data completeness, introduces bias, and limits generalizability. Objective To quantify nonresponsiveness over time in a contemporary cohort of cancer survivors, identify individual- and center-level factors associate...

Optimal Execution on Uniswap v2/v3 under Transient Price Impact

We study the optimal liquidation of a large position on Uniswap v2 and Uniswap v3 in discrete time. The instantaneous price impact is derived from the AMM pricing rule. Transient impact is modelled to capture either exponential or approximately power-law decay, together with a pe...

SPEF1 mediates assembly of central pair microtubule complexes in cilia of Tetrahymena

SPEF1 is a conserved calponin-homology domain protein that decorates the seam of central pair microtubules in the distal segment of motile cilia. Here, we show that in the ciliate Tetrahymena, loss of SPEF1 disrupts the central pair throughout the middle segment, which comprises...

210Pbex in lacustrine sediments: A half-century global synthesis (1977-2024)

Unsupported 210 Pb ( 210 Pb ex ) is a naturally occurring radionuclide widely used to establish sediment chronologies spanning the past ∼150 years, thereby providing high-resolution temporal frameworks for palaeolimnological reconstructions. Since the late 1970s, numerous hypothe...

Quantitatively mapping the Eady model onto a two-layer quasi-geostrophic model

The two-layer quasi-geostrophic (2LQG) model and the Eady model are two idealised systems illustrating the baroclinic instability of atmospheric jets and ocean currents. The two set-ups share many ingredients – background vertically sheared zonal flow of density-stratified fluid...

Adoption and development of cereal–legume intercropping on farms: Drivers at farm and territorial scales in individual pathways

Cereal–legume intercrops offer multiple benefits for sustainable agriculture but remain a niche practice in French arable cropping systems. Though studies have identified barriers and motivations for adopting these practices, the conditions for their long-term adoption remain und...

Halting marine plastic inputs by 2050 is necessary but not sufficient to avoid microplastic accumulation

Marine plastic pollution threatens ecosystems, economies, and human health, yet economic literature overlooks the transport of plastic debris across marine ecosystem compartments and its natural breakdown. Here we show, using a system dynamics model, the global physical and econo...

Sympatric European white oaks species display contrasting epigenetic response to soil water availability

Abstract In the context of climate change plants have to cope with adverse conditions, among which water scarcity is a major threat for their survival. They have developed diverse regulatory processes to face drought that may differ depending on their ecological niche. The two sy...

Contact and recruit – the importance of acoustic communication in the foraging strategy of a flightless seabird

While foraging, seabirds use various cues to navigate, including other predators to signal the presence of inconspicuous prey. Transfers of information have been conceptualised in flying seabirds as local enhancement and foraging networks, with visual signals used over a few kilo...

Association of cryptic pregnancy and alcohol consumption with fetal alcohol spectrum disorder: a nationwide population-based study of 5 million women in 2015–2022

Cryptic pregnancy (CP) also known as pregnancy denial remains an underexplored risk factor for FASD. To our knowledge, there is no available epidemiologic data in the scientific literature exploring the association between CP and FASD. This study aimed to examine the association...

Accuracy of the Interpolated Surface Mesh Method for OEP Volume Measurement

Background: Optoelectronic plethysmography (OEP) is a non-invasive technique that can be used to assess both respiratory volumes and chest wall kinematics. An interpolation surface method (ISM) has been recently developed to enhance OEP kinematic analysis. The aim of this study w...

The Universal Chow Algebra of Powers of Smooth Varieties

Over an arbitrary field $k$ and with coefficients in any commutative ring $\Lambda$, we determine the graded algebra of Chow classes on powers of smooth relative $d$-folds that are natural under arbitrary smooth-source base change. It is generated by the tangent Chern classes $c_...

Convergence Analysis of a High-Order Multiscale Finite Element Method (MsFEM) for Stokes Flows in Heterogeneous Media

Abstract. An enriched nonconforming Multiscale Finite Element Method (MsFEM) to solve viscous incompressible flow problems in genuine heterogeneous or porous media was proposed in [Q. Feng, G. Allaire, and P. Omnes, Multiscale Model. Simul., 20 (2022), pp. 462–492]. The main feat...

Anaesthesia for patients with non-vascular Ehlers-Danlos syndromes: recommendations based on a descriptive cohort study of 69 patients and 127 orthopaedic operations

Anaesthetists are generally well-aware of the serious complications that can occur when anaesthetising patients with vascular Ehlers-Danlos syndrome. They are usually less familiar with complications that can occur in patients with hypermobile EDS and other non-vascular EDS (nvED...

A new transcendence measure for the values of the exponential function at algebraic arguments

Let P ∈ ℤ [ X ] ∖ { 0 } be of degree δ ≥ 1 and usual height H ≥ 1 , and let α ∈ ℚ ¯ * be of degree d ≥ 2 . Mahler proved in 1931 the following transcendence measure for e α : for any ε > 0 , there exists c > 0 such that | P ( e α ) | > c / H μ ( d , δ ) + ε where the exponent μ (...

Quality standards for preclinical research in cardio-oncology

Preclinical research in cancer therapy-related cardiovascular toxicity (CTR-CVT) is a major domain of cardio-oncology and has provided biological explanation for the cardiovascular adverse effects of many cancer therapies. However, the choice of the experimental models to investi...

Continuous logistic Gaussian random measure fields for spatial distributional modelling

Abstract We study Spatial Logistic Gaussian Process (SLGP) models for non-parametric estimation of probability density fields using scattered samples of heterogeneous sizes. SLGPs are examined from the perspective of random measures and their densities, investigating the relation...