Institut Polytechnique de Paris

Information in the First Globalization: News Agencies and Trade

This paper documents the effect of information frictions on trade using a historical large-scale improvement in the transmission of news: the emergence of global news agencies. The information available to potential traders became more abundant, was delivered faster and at a chea...

Resolvent modelling of subsonic jet noise

When jet noise is cast in the form of a linear input–output problem, the cross-spectral-density (CSD) matrix of the sound field is forced by the CSD of nonlinear interactions via the resolvent operator. The forcing CSD is difficult to compute or measure, but its projection onto t...

Ten years of measurements (2012-2022) of the atmospheric composition at Saclay/SIRTA observatory in the Ile de France region as part of ICOS and ACTRIS

Abstract. CO2 is the main contributor to global warming, and cities now account for more than two-thirds of emissions of this gas. Atmospheric observatories located on the outskirts of cities are therefore important facilities for measuring the impact on atmospheric composition o...

Impact of fault aperture variation on induced seismicity at the VITO geothermal site

Abstract Mitigating induced seismicity remains a major challenge for geothermal reservoir stimulation. At the VITO geothermal site in Belgium, operations have induced seismic events with moment magnitudes up to M W 2.0 within the fractured Dinantian limestone reservoir. Numerical...

Personalized digital remote monitoring for older patients: multicentric RCT study protocol–EPOCARE

Population ageing combined with the growing prevalence of multimorbidity is placing increasing pressure on healthcare systems, contributing to frequent emergency department (ED) visits and unplanned hospitalizations among older adults. Remote patient monitoring (RPM) has emerged...

Relationships between deep convective clouds, cirrus clouds, and the tropical easterly jet over the Indian region observed with Aeolus spaceborne Doppler wind lidar

Abstract. Direct wind observations used to be rare over the Arabian Sea and the Bay of Bengal. Since the launch of ESA's Aeolus Doppler Wind Lidar, profiles of horizontal wind are acquired every day and are perfectly co-located with profiles of thin and opaque clouds. In this stu...

A hybrid combinatorial-continuous strategy for solving molecular distance geometry problems

Abstract The Molecular Distance Geometry Problem is essential to structural biology, as it seeks to determine three-dimensional protein structures from partial interatomic distances. Its discretizable subclass (DMDGP) admits an exact combinatorial formulation that enables efficie...

Correlating growth time with stoichiometry and electronic structure in WS2 nanoflakes grown by quasi-van der Waals molecular beam epitaxy on quartz

Controlling the electronic properties of two-dimensional tungsten disulfide (WS 2 ) requires precise understanding of how growth conditions govern atomic ordering and stoichiometry. However, direct correlations between growth parameters and the resulting electronic structure of W...

Multiscale Methods for Wave Propagation in Materials with Sign-Changing Coefficients

Abstract. From a mathematical perspective, the extraordinary properties of metamaterials are often reflected in the coefficients of the governing partial differential equations. These coefficients may fall outside the assumptions of classical theory, particularly when the effecti...

Experimental Methods for CRISPR Enzyme Assays with Fluorescence Readout

Fluorescence-based CRISPR diagnostic assays have become a popular platform for nucleic acid detection due to their programmability, configurability, specificity, and compatibility with standard laboratory equipment. However, reported enzymatic kinetic rates and limits of detectio...

Plasma-Assisted and Green Routes to Silicon and Carbon Quantum Dots: A Critical Comparison of Synthesis–Structure–Property Relationships

Silicon quantum dots (SiQDs) and carbon quantum dots (CQDs) are often discussed as related heavy-metal-free luminescent nanomaterials, although the mechanisms governing their formation and emission differ fundamentally. Rather than combining two parallel bodies of literature, thi...

Characterization of Thermal Recovery Activation in Fast Photochromic Flavoprotein Charge-Transfer Complexes

Abstract A promising fast, negative, red-absorbing photochromic system based on an intraprotein intermolecular charge transfer (CT) complex between a flavin cofactor and a substrate-analogue inhibitor MXA (methylthioacetate or methylselenoacetate; X = S, Se) within monomeric sarc...

What Does It Mean for a Star-Shaped 3D Scatterer to Be Small in the Time Domain?

Abstract. In the frequency domain wave scattering problems, obstacles can be effectively replaced by point scatterers as soon as the wavelength of the incident wave exceeds significantly their diameter. The situation is less clear in the time domain, where recent works suggest th...

URL Rot in Software Engineering Scholarly Works

Context: Citations play an important role in scholarly publishing. They increasingly reference Web-based resources via Uniform Resource Locators (URLs). However, URLs are prone to decay over time, threatening the value and integrity of scientific works. Objective: We investigate...

Enhancing electromagnetic calorimeter signal reconstruction with machine learning-based noise discrimination

Abstract Calorimeters operating in high-radiation environments are susceptible to damage, leading to increased noise that can significantly degrade energy resolution. A common way to mitigate noise is to apply a higher energy threshold on the calorimeter cells, typically set a fe...

PnPSelect: Plug-and-Play IoT Device Selection Using Ultra-Wideband Signals

In recent years, the number of Internet of Things (IoT) devices in smart homes has rapidly increased. A key challenge affecting user experience is how to enable users to efficiently and intuitively select the devices they wish to control. This paper proposes PnPSelect, a plug-and...

Properties and Proximal Point Type Methods for Strongly Quasiconvex Functions in Hilbert Spaces

We study strongly quasiconvex functions defined on Hilbert spaces and taking extended real values from both theoretical and algorithmic points of view. To this end, we verify the existence of (global) minimizers and the properties of the proximal operator for such functions, prev...

Refined expansions of the skew-stickiness ratio in stochastic volatility models

Building on the celebrated Bergomi–Guyon expansion, we derive next-to-leading order expansions in the volatility-of-volatility parameter for the Skew-Stickiness Ratio—an indicator of implied volatility dynamics—within a general class of forward variance models, thus pursuing the...

The Lee-Yang model and its generalizations through the lens of long-range deformations

Abstract In two dimensions, the non-unitary class of conformal minimal models, M(2,2m+1), has been recently conjectured to arise as renormalization-group fixed points of scalar field theories with complex iφ 2m-1 interaction, m∈N, m≥2. We test a variation of this conjecture throu...