Université d'Orléans

A 4200-hour HyperFlash and ÉCLAT campaign on the hyperactive FRB 20240114A: constraining energetics with the most brilliant bursts

Abstract Hyperactive repeaters provide a unique window into the evolving environments and energy budgets of fast radio burst (FRB) sources, though they may not be representative of the FRB population in general. High-cadence observations are key to capturing the rarest and most e...

Metabolomics-Guided Bioactivity Evaluation of Disease-Resistant Hybrid Grape Canes for Cosmetic Valorization

Abstract Grape canes constitute a valuable source of diverse polyphenols with recognized cosmetic properties, whose composition varies according to genotype and environmental conditions. Because grapevine resistance to pathogens is partly mediated by the biosynthesis of polypheno...

Intermittent or Continuous Renal-Replacement Therapy in Acute Kidney Injury

BackgroundThe preferred method of renal-replacement therapy for acute kidney injury in critically ill patients remains uncertain. MethodsIn this multicenter, open-label, noninferiority trial, we randomly assigned critically ill adults with acute kidney injury who had indications...

Understanding Firm Dynamics and Performance Under COVID-19

Abstract We use data from the 2020/21 Egyptian Industrial Firm Behavior Survey (EIFBS) to examine the impact of the COVID-19 crisis on firm dynamics and performance. To gain a deeper understanding, our second objective is to explore potential underlying correlates of firm dynamic...

Egyptian Exporters Under the Lens: Uncovering Competitiveness Challenges

Abstract This paper examines the determinants of export participation among Egyptian manufacturing firms using the 2020/21 Egyptian Industrial Firm Behavior Survey (EIFBS). Against the backdrop of Egypt’s persistent export underperformance and limited upgrading in manufacturing e...

Singlet Oxygen-Responsive MRI Contrast Agents

Abstract In vivo imaging detection of singlet oxygen (1O2) produced by photodynamic therapy remains a challenge. To address this unmet necessity, two Gd3+-based multicyclic magnetic resonance imaging (MRI) probes 1 and 2 were synthesized and characterized for their ability to rea...

Nonlocal Hamilton–Jacobi Equations on a network with Kirchhoff type conditions

In this article, we consider nonlocal Hamilton–Jacobi Equations on networks with Kirchhoff type conditions for the interior vertices and Dirichlet boundary conditions for the boundary ones: we provide general existence and comparison results in the case when the nonlocal operator...

Generalized Nonlinear Bayesian Pulsar Timing with ENTERPRISE

Abstract We use the Bayesian methods in the ENTERPRISE package to examine the fully general parameterization of pulsar timing models in tandem with noise. We investigate four pulsars, PSRs J1600–3053, J2043+1711, J0740+6620, and J1640+2224, through the lens of Bayesian timing. We...

Supramolecular Janus Nanocylinders: Solvent-Induced Hydrogen-Bond Modulation Yields Structures under Thermodynamic Equilibrium

Abstract Janus nanocylinders (JNCs) are anisotropic, non-centrosymmetric colloids composed of two different faces, making them attractive for advanced functional materials. However, their nanometric dimensions and pronounced anisotropy complexify their preparation. Recently, a ve...

Frequency-dependent shear and bulk viscosity of aqueous and non-aqueous lithium battery electrolytes

Transverse ultrasound was used to examine the frequency-dependent shear viscosities of three lithium bis(trifluoromethanesulfonyl)imide-based electrolytes: aqueous, non-aqueous, and hybrid aqueous-organic solutions. Frequency-dependent bulk viscosities of two of the electrolytes...

Effects of radiative heat transfer on premixed spherically expanding NH3-air flames

This article numerically investigates the effects of radiation on the laminar burning velocity (LBV) extrapolated from microgravity spherical expanding NH 3 /air premixed flames, with equivalence ratios and pressures ranging from 0.7 to 1.3 and 1 to 50 atm, respectively. The simu...

Undifferentiated Prehospital Chest Pain: Aetiologies and a Proof-of-Concept Model for Significant Coronary Lesions

Background: Undifferentiated chest pain is one of the most common reasons for emergency medical service (EMS) activation, yet its aetiological spectrum remains poorly characterised in the prehospital setting. Furthermore, no clinical prediction model has been specifically develop...

Determining a graph from its reconfiguration graph

Given a graph G and a natural number k , the k -recolouring graph C k ( G ) is the graph whose vertices are the k -colourings of G and whose edges link pairs of colourings which differ at exactly one vertex of G . Recently, Hogan et al. proved that G can be determined from C k (...

Traumatic intracranial lesion prevalence in CT-imaged adults with mild traumatic brain injury receiving dual versus single antiplatelet therapy: a two-center cohort study

Abstract Among adults with mild traumatic brain injury (mTBI) who are already receiving antiplatelet therapy, evidence comparing radiographic lesion prevalence between dual and single therapy remains limited. We conducted a retrospective two-center cohort study in two French univ...

Experimental constraints on pre-eruptive conditions at Nabro volcano, Eritrea, 2011, and implications for sulphur emissions

Abstract We present new experimental constraints on the pre-eruptive magma storage conditions at Nabro Volcano, Eritrea, prior to its 2011 eruption, and discuss the implications for sulphur emissions. We find that the magma was likely stored in the shallow crust prior to eruption...

Multi-analytical study of the effects of secondary working and recycling in Roman glass

The impact of secondary processing and recycling on the composition and redox equilibrium in archaeological glass remains difficult to assess. This paper reports the results of a multi-analytical study of glass finds from a Roman villa in southwestern France, revealing varying mi...

Magma-induced midcrustal flow and high-temperature metamorphism: Insights from the early Mesozoic Yunkai massif (South China) and tectonic implications

The way in which partial melting weakens the middle continental crust and triggers lateral flow is fundamental to understanding orogenic processes, yet the specific roles of magmatic heat and deformation remain debated. We addressed this issue through an integrated study of the e...

Constitutive natural killer cell features associated with post-treatment control of SIV infection in the pVISCONTI study

Abstract Post-treatment HIV controllers (PTC) offer a unique opportunity to uncover the determinants of durable remission after antiretroviral therapy (ART) interruption. Here, using six PTC and six post-treatment non-controllers from the pVISCONTI study in cynomolgus macaques, w...

Termites play a crucial role in forming major tropical soils: insights from a deep Ferralsol

Abstract Soil bioturbation is increasingly recognized as a key driver of pedogenesis in tropical ecosystems, influencing above- and below-ground biodiversity, nutrient cycling, and aggregate stability across different spatial and temporal scales. This ecological process may play...

On the effects of using nonlinear springs in mono-coupled periodic structures

Abstract Many strategies are employed to control structural vibration. One of them is to design structural elements in a periodic arrangement to obtain the so-called bandgap effect. For infinite periodic structures, bandgaps are defined as frequency ranges where waves do not prop...