A5043962952- Galaxies: Formation, Evolution, Phenomena
- Cosmology and Gravitation Theories
- Electronic Packaging and Soldering Technologies
- 3D IC and TSV technologies
- Adaptive optics and wavefront sensing
- Astronomy and Astrophysical Research
- Advanced Surface Polishing Techniques
- Stellar, planetary, and galactic studies
- Microstructure and mechanical properties
- Metal Forming Simulation Techniques
- Metallurgy and Material Forming
- Statistical Methods and Inference
- Radio Astronomy Observations and Technology
- Statistical Methods and Bayesian Inference
- Adhesion, Friction, and Surface Interactions
- Spatial and Panel Data Analysis
- Dark Matter and Cosmic Phenomena
- Scientific Research and Discoveries
- Astrophysics and Star Formation Studies
- Calibration and Measurement Techniques
- Statistical and numerical algorithms
- Advancements in Photolithography Techniques
- Electron and X-Ray Spectroscopy Techniques
- Advanced MEMS and NEMS Technologies
- Laser and Thermal Forming Techniques
Ludwig-Maximilians-Universität München
2023-2024
Constellium (France)
2022-2023
Sorbonne Université
2020-2022
Centre National de la Recherche Scientifique
2020-2022
Institut d'Astrophysique de Paris
2019-2022
Soitec (France)
2008-2015
The current standard model of cosmology successfully describes a variety measurements, but the nature its main ingredients, dark matter and energy, remains unknown. is medium-class mission in Cosmic Vision 2015--2025 programme European Space Agency (ESA) that will provide high-resolution optical imaging, as well near-infrared imaging spectroscopy, over about 14\,000\,deg$^2$ extragalactic sky. In addition to accurate weak lensing clustering measurements probe structure formation half age...
Recent cosmic shear studies have shown that higher-order statistics (HOS) developed by independent teams now outperform standard two-point estimators in terms of statistical precision thanks to their sensitivity the non-Gaussian features large-scale structure. The aim Higher-Order Weak Lensing Statistics (HOWLS) project is assess, compare, and combine constraining power ten different HOS on a common set $Euclid$-like mocks, derived from N-body simulations. In this first paper HOWLS series,...
Pinning down the total neutrino mass and dark energy equation of state is a key aim for upcoming galaxy surveys. Weak lensing unique probe matter distribution whose non-Gaussian statistics can be quantified by one-point probability function (PDF) convergence. We calculate convergence PDF on mildly non-linear scales from first principles using large-deviation statistics, accounting mass. For time, we comprehensively validate cosmology-dependence model against large suites simulated maps,...
Bonding energy represents an important parameter for direct bonding applications as well the elaboration of physical mechanisms at interfaces. Measurement using double cantilever beam (DCB) under prescribed displacement is most used technique thanks to its simplicity. The measurements are typically done in standard atmosphere with relative humidity above 30%. Therefore, obtained energies strongly impacted by water stress corrosion This paper presents directly bonded silicon wafers anhydrous...
One-point probability distribution functions (PDFs) of the cosmic matter density are powerful cosmological probes that extract non-Gaussian properties and complement two-point statistics. Computing covariance one-point PDFs is key for building a robust galaxy survey analysis upcoming surveys like Euclid Rubin Observatory LSST requires good models characterising spatial correlations. In this work, we obtain accurate PDF covariances using effective shifted lognormal mildly weak lensing...
ABSTRACT The distribution of the cosmic convergence field is modelled using a large deviation principle where all non-Gaussian contributions are computed from first principles. geometry past light-cone accounted for by constructing total weak-lensing signal matter density in thin disc slices. prediction this model successfully tested against numerical simulation with ray-tracing, and found to be accurate within at least 5 per cent tails redshift 1 opening angle 10 arcmin even more so...
Abstract The last few years have seen the development of a promising theoretical framework for statistics cosmic large-scale structure — theory large deviations (LDT) modelling weak-lensing one-point in mildly nonlinear regime. goal this series papers is to make leap and lay out steps perform an actual data analysis with tool. Building upon LDT framework, work (paper I) we demonstrate how accurately model Probability Distribution Function (PDF) reconstructed Kaiser-Squires convergence field...
In the context of tomographic cosmic shear surveys, a theoretical model for one-point statistics aperture mass (Map) is developed. This formalism based on application large deviation principle to projected matter density field and more specifically angular masses. The latter holds advantage being an observable that can be directly extracted from observed be, by construction, independent long wave modes. Furthermore we show that, with help nulling procedure so-called BNT transform, it...
In cosmic web analysis, complementary to traditional cosmological probes, the extrema (e.g. peaks and voids) two-point correlation functions (2PCFs) are of particular interest for study both astrophysical phenomena structure formation. However most previous studies constructed those statistics via N-body simulations without a robust theoretical derivation from first principles. A strong motivation exists analytically describing 2PCFs these local extrema, taking into account nonlinear...
Key non-Gaussian properties of cosmological fields can be captured by their one-point statistics, providing a complement to two-point statistical measurements from power spectra or correlation functions. Large deviation theory robustly predict the statistics density on mildly non-linear scales first principles. It provides direct prediction for cumulant generating function (CGF) such fields, which more commonly used probability (PDF) is extracted through an inverse Laplace transform. For...
During direct bonding, a thin gas film is trapped in-between the two wafers, leading to an interactive fluid/structure dynamics. A model of bonding dynamics formulated using plate approximation, Reynolds equation, and adhesion forces as boundary condition at front. The transient equation solved numerically in one dimensional cylindrical case. entire process, including initiation propagation front, modelled. supported by experimental data from original setup involving non-contact optical...
Weak lensing of galaxies and CMB photons through the large-scale structure Universe is one most promising cosmological probes with upcoming experiments dedicated to its measurements such as Euclid/LSST Stage 4 experiments. With increasingly precise measurements, there a dire need for accurate theoretical predictions. In this work, we focus on higher order statistics weak convergence field, namely cumulants skewness kurtosis one-point probability distribution (PDF), quantify using...
In this work, we demonstrate the constraining power of tomographic weak lensing convergence PDF for StageIV-like source galaxy redshift bins and shape noise. We focus on scales <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>10</mml:mn></mml:math> to display="inline"><mml:mn>20</mml:mn></mml:math> arcmin in mildly nonlinear regime, where its changes with cosmological parameters can be predicted theoretically. model impact reconstructing from shear field...
The wafer bonding has been established as a key process used for the fabrication of silicon-on-insulator (SOI) substrates. In present paper an overview fundamental aspects involved in is presented. mechanisms silicon and oxide are discussed with emphasis on phenomenological models developed case SOI bonding. Interactions between mechanical adhesion dynamics interface chemistry their impact modeling also discussed. One main challenges today validation existing comparison physical measurements...
In the context of tomographic cosmic shear surveys, there exists a nulling transformation weak lensing observations (also called BNT transform) that allows us to simplify correlation structure observations, as well build observables depend only on localized range redshifts and thus independent from low-redshift/small-scale modes. This procedure renders possible accurate, from-first-principles, predictions convergence aperture mass one-point distributions (PDF). We here explore other...
The last few years have seen the development of a promising theoretical framework for statistics cosmic large-scale structure -- theory large deviations (LDT) modelling weak-lensing one-point in mildly non-linear regime. goal this series papers is to make leap and lay out steps perform an actual data analysis with tool. Building upon LDT framework, work (Paper I) we demonstrate how accurately model Probability Distribution Function (PDF) reconstructed Kaiser-Squires convergence field under...
A simple model describing the hydrophilic adhesion between solid surfaces, with low roughness is proposed to explain both influence of interface and quantity water present at on work separation. The observed hysteresis separation explained by evolving distribution along bonding interface. This based earlier molecular dynamics simulations direct previously obtained Cole et al. An experimental validation presented showing good agreement predictions.
Context. The objective classification of the cosmic web into different environments is an important aspect large-scale structure studies, as it can be used a tool to study formation structures (halos and galaxies) in mode detail, forms link between their properties environment; these also offer another class objects whose statistics contain cosmological information. Aims. In this paper, we present analytical framework compute probability based on so-called T-web formalism, which classifies...
In this work, we demonstrate the constraining power of tomographic weak lensing convergence PDF for StageIV-like source galaxy redshift bins and shape noise. We focus on scales $10$ to $20$ arcmin in mildly nonlinear regime, where its changes with cosmological parameters can be predicted theoretically. model impact reconstructing from shear field using well-known Kaiser-Squires formalism. cross-validate measured derived maps reconstructed simulated catalogues. Employing a Fisher forecast,...
Weak gravitational lensing, which results from the bending of light by matter along line sight, is a potent tool for exploring large-scale structures, particularly in quantifying non-Gaussianities. It pivotal objective upcoming surveys. In realm current and forthcoming full-sky weak-lensing surveys, convergence maps, represent line-of-sight integration density field up to source redshift, facilitate field-level inference. This provides an advantageous avenue cosmological exploration....
The influence of the dynamics direct wafer bonding process on curvature final stack is investigated. An analytical model for bonded wafers developed, as a function different load components acting during front propagation, using thin plate theory and considering strain discontinuity locked at interface. Experimental profiles are measured conditions thicknesses. A very good agreement with prediction obtained air layer trapped in-between two demonstrated. proposed contributes to further...
Direct bonding energy is an important parameter for direct applications as well mechanism elaboration. Thanks to its simplicity simple result interpretation, double cantilever beam (DCB) under prescribed displacement the most used technique measure energy. But, shown also in this study, measurement of Si/SiO2 or SiO2/SiO2 standard humid atmosphere greatly impacted by water stress corrosion. To prevent effect, energies have been evaluated anhydrous with less than 0.2ppm nitrogen. After setup...