Publications associées à Principe de Mach

Physics-enhanced machine learning with symmetry-adapted and long-range representations

Theoretical and computational approaches to the study of materials and molecules have, over the last few decades, progressed at an exponential rate. Yet, the possibility of producing numerical predictions that are on par with experimental measurements is t ...

EPFL2021

Locally supported tangential vector, n-vector, and tensor fields

Christopher Brandt

We introduce a construction of subspaces of the spaces of tangential vector, n-vector, and tensor fields on surfaces. The resulting subspaces can be used as the basis of fast approximation algorithms for design and processing problems that involve tangenti ...

2020

Fine-tuning of magnetic and microfluidic viscous forces for specific magnetic bead-based immunocomplex formation

Martinus Gijs, Thomas Lehnert, Matteo Cornaglia, Hüseyin Cumhur Tekin

We investigate the working principle of a novel type of microfluidic sandwich immunoassay, as used for the detection of biomarkers. The heterogeneous assay is based on the specific interactions between an array of functionalized superparamagnetic beads and ...

American Institute of Physics2013

Image analysis technique applied to lock-exchange gravity currents

Mário Jorge Rodrigues Pereira Da Franca, Helena Isabel Dos Santos Nogueira, Claudia Adduce

An image analysis technique is used to estimate the two-dimensional instantaneous density field of unsteady gravity currents produced by full-depth lock-release of saline water. An experiment reproducing a gravity current was performed in a 3.0 m long, 0.2 ...

Institute of Physics2013

A counterexample to the local-global principle of linear dependence for Abelian varieties

Antonella Perucca, Peter Simon Jossen

Let A be an Abelian variety defined over a number field k. Let P be a point in A(k) and let X be a subgroup of A(k). Gajda and Kowalski asked in 2002 whether it is true that the point P belongs to X if and only if the point (P mod p) belongs to (X mod p) f ...

2010

Openness And Convexity For Momentum Maps

Tudor Ratiu, Juan-Pablo Ortega

The purpose of this paper is finding the essential attributes underlying the convexity theorems for momentum maps. It is shown that they are of a topological nature; more specifically, we show that convexity follows if the map is open onto its image and ha ...

2009

Protons at the Si-SiO2 interface: a first principle investigation

Alfredo Pasquarello

We studied protons attached to bridging O atoms in the vicinity of the Si(100)-SiO2 interface through density-functional calculations for realistic interface models. These protons do not disrupt the bonding network except in the case of strained SiO bonds ...

2007

Onboard Flow Visualization in a Pelton Turbine Bucket

François Avellan, Alexandre Perrig

Flow visualizations using endoscopes in a 21-bucket single-injector reduced scale Pelton turbine are performed for 2 operating points. 2 types of visualizations are performed with a CMOS high-speed camera: (i) an onboard visualization of the flow in the bu ...

International Association For Hydraulic Research2006

Three Dimensional Frames of References Transformations using Recurrent Populations of Neurons

Aude Billard, Eric Sauser

This work investigates whether population vector coding, a distributed computational paradigm, could be a principle mechanism for performing sensorimotor and frames of reference transformations. This paper presents a multilayer neural network that can perf ...

2005

Development of Miniature Manipulators for Applications in Biology and Nanotechnologies

Jean-Marc Breguet, Walter Driesen

In the precision engineering industry, research and development is undertaken towards the development of microfactories, miniaturized environments for fabrication and assembly of small components. Micro handling and micromanipulation, especially in biology ...

2003

Experimental and Numerical Analysis or Free Surface Flows in a Rotating Bucket

François Avellan, Sonia Kvicinsky

The aim of this study was to provide a complete experimental and numerical analysis of the flow in a rotating Pelton bucket. For the experimental analysis, several functioning points have been used in order to study differences which may occur in various s ...

International Association For Hydraulic Research2002

Multivariable design of bilateral Master-Slave force reflecting servomechanisms

Bilateral Master-Slave force reflecting servomechanisms are very interesting and useful devices. The basic principle of these systems is too realise a force and position transformation between the two mechanisms. This paper presents the design of the multi ...

1997