Canal-U

Mon compte

Résultats de recherche

Nombre de programmes trouvés : 4804
Conférences

le (41m28s)

Olivier Joubert - Brief Overview of Current French Hydrogen Research Activities, Focus on Materials

Twenty years ago, the French scientific community working in the field of hydrogen, started to federate under the leadership of the CNRS. It took the form of successive Research Grouping (GdR) bringing together experts in solid oxide fuel cell (SOFC), proton exchange polymer membrane (PEMFC) fuel cells, hydrogen storage and systems mainly from CNRS but also from CEA. These GdRs promoted and structured an interdisciplinary field of research with excellent results.   Since January 1st of 2020, the CNRS community has formed the Research network on ...
Voir la vidéo
Conférences

le (38m38s)

Pascal Brault - Reactive molecular dynamics simulations of H2 production and conversion

Since H2 production and conversion efficiencies can be improved and monitored at the molecular scale, reactive molecular dynamics simulations (rMDS) are expected to be of great promise for understanding associated basic mechanisms. Basically, rMDS is a technique aiming at solving full trajectories of a set of atoms, molecules, nanoparticles, with the only ingredient of force fields driving interactions between relevant species.   Due to the recent growth of improved and reactive force fields such as ReaxFF and COMB3 families, it become possible to address complicated reactive process such as H2 ...
Voir la vidéo
Conférences

le (22m21s)

Sixto Malato - Solar photocatalytic hydrogen production at pilot scale

Solar energy is well-recognized as a sustainable and clean energy source. Among the various approaches to solar energy conversion, solar-driven hydrogen production is one of the most promising ways to convert solar energy into hydrogen, a storable fuel. Hydrogen is undoubtedly one of the most attractive renewable alternatives to fossil fuels for a number of reasons: (i) hydrogen can be safely stored; (ii) it is an excellent energy carrier since it can store 3 times as much energy as conventional natural gas; (iii) its combustion is environmentally friendly (no release of greenhouse ...
Voir la vidéo
Conférences

le (24m12s)

Athanasios G. Konstandopoulos - Material and Reactor Technologies for Solar Fuels

The synthesis of carbon-neutral/zero-carbon footprint fuels via solar thermochemical processes (“Solar Fuels”) represents a promising approach for the realization of a sustainable energy future. These high temperature processes (effected by concentrated solar technology) “regenerate” streams of “dead hydrogen” (H2O) and/or “dead carbon”, CO2, through thermochemical Water (WS) and/or Carbon Dioxide Splitting (CDS) into H2 and CO respectively, after contact with oxygen-deficient, “redox” materials that are thus re-oxidized. Subsequently thermal reduction of the material is applied, by raising the temperature at a higher level, thus establishing a two-step cycle. Solar CO and ...
Voir la vidéo
Conférences

le (48m0s)

Juan Matos - H2 production on 1D and 2D Carbon-containing Fe-, Co, and Ni-based foamy catalysts.

C-containing Fe-, Co-, and Ni-based catalysts have been synthesized from the controlled pyrolysis of saccharose. The topological properties of the 2D materials were significantly different from other 2D carbon-based cell structures. TEM and STEM showed that catalysts are composed by 1D and 2D morphologies, manly those with Co- and Ni, and these morphologies seems to be remaining from the pristine carbon structures in absence of metals. Carbon seems to play a template role for the growing of the metal-containing structures. Electron microscopy also showed that catalysts are composed by a high compaction ...
Voir la vidéo
Label UNT Conférences

le (1h5m6s)

Opinion polarization and network segregation. Modelling a complex Relationship

Recently, many societies seem to shift towards more polarization and volatility in opinions, for example in attitudes about immigration, climate policy, or the best policy response to Covid-19. A key obstacle for a scientific understanding of this development is that opinion dynamics in society involve a complex micro-macro interaction between processes of social influence occurring at the micro-level, meso-level conditions like network structures, and macro-level outcomes, like consensus, opinion-clustering or polarization. I will discuss how agent-based simulation models (ABM) can be used to further ...
Voir la vidéo
Conférences

le (1h5m6s)

Opinion polarization and network segregation. Modelling a complex Relationship

Recently, many societies seem to shift towards more polarization and volatility in opinions, for example in attitudes about immigration, climate policy, or the best policy response to Covid-19. A key obstacle for a scientific understanding of this development is that opinion dynamics in society involve a complex micro-macro interaction between processes of social influence occurring at the micro-level, meso-level conditions like network structures, and macro-level outcomes, like consensus, opinion-clustering or polarization. I will discuss how agent-based simulation models (ABM) can be used to further ...
Voir la vidéo
Conférences

le (36m5s)

Sonia Lacroix-Lamandé et Agnès Wiedemann - Etudes ex vivo des interactions hôte-pathogènes au moyen de cultures d'organoïdes dérivés de cryptes intestinales

L'analyse ex vivo des interactions entre les cellules épithéliales intestinales et des agents pathogènes entériques a été entravée par le manque de systèmes appropriés de culture de l'épithélium intestinal. Récemment, des équipes ont réussi à mettre au point des cultures de «structures organoïdes» isolées de cryptes intestinales de souris, qui possèdent des caractéristiques histologiques mimant l’organisation de l’épithélium intestinal in vivo.Notre objectif est de développer la culture d’organoïdes dérivés de cryptes intestinales de souris afin d’étudier l’interaction de Salmonella Typhimurium ou de Cryptosporidium parvum avec l’épithélium intestinal. Ce système représente un modèle expérimental très approprié pour visualiser (i) le caractère ...
Voir la vidéo

 
FMSH
 
Facebook Twitter
Mon Compte