Publications associées à Socialist calculation debate

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Within the scope of the implementation of a nuclear data pipeline aiming at producing the best possible evaluated nuclear data files, a major point is the production of relevant sensitivity coefficients when including integral benchmark information. Thanks ...

Elsevier Science Sa2024

Model uncertainties in action effects and load bearing capacity calculation in statically indeterminate reinforced concrete structures

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For the dimensioning and assessment of structures, it is common practice to compare action effects with sectional resistances. Extensive studies have been performed to quantify the model uncertainty on the resistance side. However, for statically indetermi ...

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Hydromorphological assessment of sediment augmentation measures in gravel-bed rivers

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In the riverine environment, the riverscape, sediment and flow regime are essential drivers for natural habitat dynamics. Today, most water courses in Europe are regulated, and their natural dynamics are impaired. Flood releases coupled with the artificial ...

EPFL2023

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The calculations performed for the design and operation of a Nuclear Power Plant (NPP) are a key factor for their safety analyses. The standard for the computational analysis of NPPs is the so called conventional approach, which relies on coarse mesh diffu ...

EPFL2022

Magnetic Properties of Surface Adsorbed Metal Adatoms and Dimers

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EPFL2022

Scalable Multi-agent Coordination and Resource Sharing

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A plethora of real world problems consist of a number of agents that interact, learn, cooperate, coordinate, and compete with others in ever more complex environments. Examples include autonomous vehicles, robotic agents, intelligent infrastructure, IoT de ...

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Li-S batteries are a promising alternative to Li-ion batteries, offering large energy storage capacity and wide operating temperature range. However, their performance is heavily affected by the Li-polysulfide (LiPS) shuttling. Computational screening of L ...

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Large magnetoresistance and nonzero Berry phase in the nodal-line semimetal MoO2

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We performed calculations of the electronic band structure and the Fermi surface as well as measured the longitudinal resistivity rho(xx)(T,H), Hall resistivity rho(xy)(T,H), and quantum oscillations of the magnetization as a function of temperature at var ...

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Materials Cloud, a platform for open computational science

Berend Smit, Nicola Marzari, Giovanni Pizzi, Martin Uhrin, Fernando Gargiulo, Aliaksandr Yakutovich, Christoph Leopold Talirz, Sebastiaan Philippe Huber, Snehal Pramod Kumbhar, Casper Welzel Andersen, Spyros Zoupanos, Elsa Passaro, Daniele Passerone

Materials Cloud is a platform designed to enable open and seamless sharing of resources for computational science, driven by applications in materials modelling. It hosts (1) archival and dissemination services for raw and curated data, together with their ...

2020

Moire Flat Bands in Twisted Double Bilayer Graphene

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We investigate twisted double bilayer graphene (TDBG), a four-layer system composed of two AB-stacked graphene bilayers rotated with respect to each other by a small angle. Our ab initio band structure calculations reveal a considerable energy gap at the c ...

AMER CHEMICAL SOC2020

Ultrafast Structural Dynamics along the beta - gamma Phase Transition Path in MnAs

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We investigate the orthorhombic distortion and the structural dynamics of epitaxial MnAs layers on GaAs(001) using static and time-resolved x-ray diffraction. Laser-induced intensity oscillations of Bragg reflections allow us to identify the optical phonon ...

AMER PHYSICAL SOC2019

Effects of 3D Ideal MHD Equilibrium Geometry on Neoclassical Properties in Tokamaks: Exploring Bootstrap Current and Impurity Accumulation

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This thesis concentrates on investigating the presence of 3D ideal MHD instabilities, particularly a saturated 1/1 ideal internal kink, on neoclassical phenomena such as the bootstrap current and heavy impurity transport. The MHD equilibria are generated u ...

EPFL2018

Replicating portfolio approach to capital calculation

Mathieu Jacques David Cambou, Damir Filipovic

The replicating portfolio (RP) approach to the calculation of capital for life insurance portfolios is an industry standard. The RP is obtained from projecting the terminal loss of discounted asset–liability cash flows on a set of factors generated by a fa ...

2018

Cavity ring-down spectroscopy to measure negative ion density in a helicon plasma source for fusion neutral beams

Ivo Furno, Alan Howling, Philippe Frédérique Bruno Guittienne, Yanis Andrebe, Rémy Jacquier, Riccardo Agnello, Gennady Plyushchev

Cavity Ring Down Spectroscopy (CRDS) is used to measure the D- absolute density produced in the helicon plasma reactor RAID (Resonant Antenna Ion Device) at the Swiss Plasma Center. The birdcage geometry of the helicon antenna produces a homogeneous, high- ...

2018

Sizable Excitonic Effects Undermining the Photocatalytic Efficiency of beta-Cu2V2O7

Alfredo Pasquarello, Raffaella Buonsanti, Julia Anna Wiktor, Mariateresa Scarongella, Igor Reshetnyak, Michal Stanislaw Strach

Copper vanadates have been proposed as promising photoanodes for water-splitting photoelectrochemical cells, but their performance has recently been shown to be severely limited. To understand this behavior, we study the electronic structure and the optica ...

2018

Cooperativity in Spin Crossover Systems. An Atomistic Perspective on the Devil's Staircase

Sergio Vela Llausi

Cooperativity is key in defining the shape (i.e., gradual, abrupt, or hysteretic) of thermally driven spin transitions in magnetic switches. Despite its importance, there is very little information on its atomistic origin, which hinders the rational design ...

AMER CHEMICAL SOC2018

Mechanical signatures of degradation of the photovoltaic perovskite CH3NH3PbI3 upon water vapor exposure

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We report on the mechanical properties of CH3NH3PbI3 photovoltaic perovskite measured by nanoindentation. The Young's modulus (E) of the pristine sample is 20.0 +/- 1.5GPa, while the hardness (H) is 1.0 +/- 0.1GPa. Upon extended exposure to water vapor, bo ...

2017

Fully self-consistent calculations of momentum distributions of annihilating electron-positron pairs in SiC

Julia Anna Wiktor

We performed calculations of momentum distributions of annihilating electron-positron pairs in various fully relaxed vacancy defects in SiC. We used self-consistent two-component density functional theory schemes to find the electronic and positronic densi ...

Amer Physical Soc2016