Concept

Fragmentation (informatique)

Publications associées (53)

Optimum energy of the fragmentation of kidney stones by direct impact

Jean-François Molinari

Purpose - This paper aims to describe a numerical approach to the fragmentation of kidney stones by direct impact. ...

Emerald2011

How the obscuration-zone hypothesis affects fragmentation: Illustration with the cohesive-element method

Jean-François Molinari, Sarah Levy

The problem of fragmentation prediction is at the origin of various analytical models. Among them, we focus on the ones introducing the idea of obscured zones. They assume that when a crack initiates at a defect, a stress release wave propagates away from ...

Springer Netherlands2011

"La consommation culturelle comme processus de construction identitaire : l'exemple du programme 20ans / 20 francs à Genève"

Mischa-Sébastien Piraud

"We conducted an evaluative research on a sample of participants to a Geneva program aiming to increase the access of young people to culture. Once this research was done, we developed questions concerning how identity develops among these people. The mode ...

L'Harmattan2011

Dynamic fragmentation of ceramics, signature of defects and scaling of fragment sizes

Jean-François Molinari, Sarah Levy

Defects play a critical role in the dynamic fragmentation process of structural ceramics. Cracks initiate at seemingly random locations, propagate and coalesce to form fragments. The process is accompanied by stress release waves, whose influence is diffic ...

Elsevier2010

Dynamic fragmentation of a ring: Predictable fragment mass distributions

Jean-François Molinari, Anthony Christopher Davison, Sarah Levy, Irene Vicari

We employ a finite element framework, coupled to cohesive elements, to model material decohesion of a uniformly expanding ring. Our study focuses on the average fragment mass, the distribution of fragment masses, and the heaviest fragments. The computed fr ...

American Physical Society2010

Exploring the Physics behind Dynamic Fragmentation through Parallel Simulations

Sarah Levy

The physical mechanisms underlying the dynamic fragmentation of heterogeneous brittle materials are explored through numerical simulations. The use of computational facilities, rather than experimental or fundamental sciences, ensures the accurate tracking ...

EPFL2010

Improving Reliability of Embedded Systems through Dynamic Memory Manager Optimization using Grammatical Evolution

David Atienza Alonso, José Luis Risco Martin

Technology scaling has offered advantages to embedded systems, such as increased performance, more available memory and reduced energy consumption. However, scaling also brings a number of problems like reliability degradation mechanisms. The intensive act ...

ACM Press2010

Finite element simulations of kidney stones fragmentation by direct impact: Tool geometry and multiple impacts

Jean-François Molinari

This paper analyses the fragmentation of kidney stones by direct impact with Swiss Lithoclast Master(R). Based on a previous work, the impact of the probe of the Lithoclast is modeled with a displacement control of the nodes inside the impacted area. Diffe ...

Elsevier2010

Discontinuous Galerkin method applied to fragmentation of heterogeneous materials

Jean-François Molinari, Sarah Levy, Raul Radovitzky

Since it generates a multitude of interacting cracks, the computational modeling of fragmentation requires special attention. The discontinuous Galerkin formulation provides an efﬁcient scalable framework to simulate non-linear dynamics of spatially discon ...

2009

Photocatalytic Redox Reactions for In-Source Peptide Fragmentation

Hubert Girault, Jérôme Waser, Liang Qiao, Hongyan Bi

In-source photocatalytic redox reactions based on a photosensitive target plate have been developed to realize peptide fragmentation during laser desorption ionization. Sample peptides and glucose are simply deposited on a spot of sintered TiO2 nanoparticl ...

2009

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