Pascal Dupont
YOU?
Author Swipe
View article: Aeolian transport of cohesive sand
Aeolian transport of cohesive sand Open
The influence of moisture on wind-driven sand transport is particularly important in coastal environements. While moisture is generally low in desert sands, it significantly affects sand transport on beaches or in coastal dune dynamics. St…
View article: Experimental study of particle impact on cohesive granular packing
Experimental study of particle impact on cohesive granular packing Open
We investigate experimentally the impact process of sand particles onto a cohesive granular packing made of similar particles. We use a sand-oil mixture with varying liquid content to tune the cohesive strength of the packing. The outcome …
View article: Un modèle didactique pour enseigner la compréhension de récit et son articulation à un outil « designé », les cartes iconiques
Un modèle didactique pour enseigner la compréhension de récit et son articulation à un outil « designé », les cartes iconiques Open
In this paper, we will examine the main French-speaking models of understanding developed in recent years from a didactic angle by revealing their epistemological foundations. From the analysis of these models, we draw a reorganization of …
View article: LE PROJET SEMO (SÉQUENCE D’ENSEIGNEMENT MINIMALE DE L’ORAL)
LE PROJET SEMO (SÉQUENCE D’ENSEIGNEMENT MINIMALE DE L’ORAL) Open
The need to teach the oral language has been widely accepted for twenty years, however studies on students' disciplinary awareness show that they do not yet identify the oral language as an object of study in its own right. This is why, fo…
View article: Particle impact on a cohesive granular media
Particle impact on a cohesive granular media Open
We investigate numerically the impact process of a particle of diameter d and velocity V_{i} onto a cohesive granular packing made of similar particles via two-dimensional discrete element method simulations. The cohesion is ensured by liq…
View article: Influence of cohesion on drifting snow investigated in cold wind-tunnel 
Influence of cohesion on drifting snow investigated in cold wind-tunnel  Open
<p>Aeolian transport of particles occurs in many geophysical contexts such as wind-blown sand or snow drift and is governed by a myriad of physical mechanisms. Most of drifting particles are transported within a saltation layer and h…
View article: Aerodynamic and impact thresholds for cohesive mixture of sand and non-volatile liquid
Aerodynamic and impact thresholds for cohesive mixture of sand and non-volatile liquid Open
The moisture has been recognized to have a significant influence on the initiation movement of sand by wind and consequently on sand transport rates. The pertinent literature regarding these phenomena is sparse and current available theore…
View article: Transition from Saltation to Collisional Regime in Windblown Sand
Transition from Saltation to Collisional Regime in Windblown Sand Open
We report experiments on windblown sand that highlight a transition from saltation to collisional regime above a critical dimensionless mass flux or Shields number. The transition is first seen through the mass flow rate Q, which deviates …
View article: Saltation layer of cohesive drifting snow observed in a wind tunnel
Saltation layer of cohesive drifting snow observed in a wind tunnel Open
<p>Aeolian transport of particles occurs in many geophysical contexts such as wind-blown sand or snow drift and is governed by a myriad of physical mechanisms. Most of drifting particle are transported within de saltation layer and h…
View article: Assessing Adolescent Reading Comprehension in a French Middle School: Performance and Beliefs about Knowledge
Assessing Adolescent Reading Comprehension in a French Middle School: Performance and Beliefs about Knowledge Open
In France, the growing percentage of students with reading problems calls for innovative teaching, particularly for students with serious learning difficulties. The present study was conducted on two classes with comparable reading levels:…
View article: National Scientific Validation for Data in the Information System on Nature and Landscapes (Système d'Information sur la Nature et les Paysages - SINP)
National Scientific Validation for Data in the Information System on Nature and Landscapes (Système d'Information sur la Nature et les Paysages - SINP) Open
As part of the Biodiversity Information System on Nature and Landscapes (Système d'Informations Nature et Paysages or SINP), the French National Natural History Museum has been appointed by the French ministry in charge of ecology to devel…
View article: Relaxation processes in Aeolian transport
Relaxation processes in Aeolian transport Open
\nWe investigate experimentally the relaxation process toward the equilibrium regime of saltation transport in the context of spatial inhomogeneous conditions. The relaxation length associated to this process is an important length in aeol…