Results 31 to 40 of about 5,113,525 (259)

High‐Pressure Synthesis of Quantum‐Stabilised Manganese Superhydride MnH7

open access: yesAngewandte Chemie, EarlyView.
Superhydrides are a rarity in transition metal hosts. Through high‐pressure, high‐temperature diamond anvil cell studies, the most hydrogen‐rich transition metal hydride, MnH7${\rm MnH}_7$ has been synthesised. Density functional theory calculations demonstrate that zero‐point energy stabilises the crystalline structure that MnH7${\rm MnH}_7$ adopts ...
Mikhail A. Kuzovnikov   +10 more
wiley   +2 more sources

Beyond Nanoporosity: A CO2‐Conditioned Glassy Matrix Contributes to the Brittle‐to‐Ductile Transition of Nanocellular Polyetherimide

open access: yesAdvanced Materials, EarlyView.
The mechanical performance of nanocellular polyetherimide cannot be explained by nanoporosity alone. It is shown that CO2 saturation and desorption leave a distinct mechanical signature in the glassy matrix before foaming. This matrix contribution provides a new route to understand and optimize the brittle to ductile transition in nanocellular polymers.
Félix Lizalde‐Arroyo   +7 more
wiley   +1 more source

L’Union européenne comme acteur majeur pour le retour de la paix en RD Congo [PDF]

open access: yesMouvements et Enjeux Sociaux
L’action de l’Union européenne en République démocratique du Congo s’inscrit dans une approche globale combinant instruments diplomatiques, sécuritaires et humanitaires, ce qui en fait un acteur crucial dans les efforts de retour à la paix.
Christian NDONGALA NKUNKU
doaj  

Topological Spin‐Texture Transitions in van der Waals Magnets Revealed by X‐Ray Fourier Transform Holography

open access: yesAdvanced Materials, EarlyView.
Applied here for the first time to a 2D material, high‐resolution synchrotron x‐ray Fourier transform holography directly images topological spin textures in Fe3GeTe2. Combined with atomistic tight‐binding simulations including itinerant electrons and Rashba spin‐orbit coupling, the approach reveals labyrinth, skyrmion, and mixed phases, and uncovers ...
Sourav Chowdhury   +16 more
wiley   +1 more source

The Lisbon Treaty and its consequences for rural development and sustainable tourism : A case study of Romania [PDF]

open access: yes, 2010
With the entrance into force of the Lisbon Treaty on 1 December 2009, the European Union (EU) has now more tools to deal with a scenario of 27 Member States with specific regional characteristics and different needs in the fields of rural development and
Sindico, Francesco, Oanta, Gabriela
core   +3 more sources

La France-Roumanie, une histoire en commun [PDF]

open access: yesSynergies Roumanie, 2017
Les relations entre la Roumanie et la France sont très anciennes, la reconstruction de l’Europe unie avec la communauté du charbon et de l’acier (CECA) et l’élargissement de l’union à 28 pays a rendu la Roumanie à son espace géostratégique naturel.
Ali Bouzekri
doaj  

Institutions postsecondaires françaises et pratiques d’internationalisation différenciées : analyse à partir du programme européen de doctorat international en réseau ERASMUS MUNDUS

open access: yesRevue Internationale de Pédagogie de l’Enseignement Supérieur, 2020
enThe paper questions the uneven access of higher institutions to the process of internationalization by updating practices, mindsets and strategies of institutions which reveal various degrees of international openness.The analysis of the differentiated
Magali Hardouin
doaj   +1 more source

Les contrôles aux exportations comme instruments de pouvoir dans la gouvernance de l’Internet 

open access: yesTerminal, 2022
Cet article porte sur le récent processus de négociations européennes ayant conduit à un renforcement des contrôles visant les exportations de technologies de surveillance numérique hors de l’Union européenne (UE).
Clément Perarnaud
doaj   +1 more source

Bismuth Nanogratings With Narrow Plasmon Resonances for Dynamic Polarized Color Generation and Colorimetric Sensing

open access: yesAdvanced Optical Materials, EarlyView.
Bismuth nanogratings are fabricated by pulsed laser deposition onto the nanostructured silver and polycarbonate surfaces of DVDs. They display spectrally‐narrow plasmon resonances yielding vivid colors, which are strongly sensitive to the polarization of light, angle of incidence, nature of the underlying surface and of the surrounding medium (air or ...
Fernando Chacón‐Sánchez   +5 more
wiley   +1 more source

Retour sur « le houliganisme post-adhésion ». Le cas roumain et au-delà [PDF]

open access: yesSynergies Roumanie, 2017
En partant du concept de « post-accession hooliganism » théorisé par V.I. Ganev pour rendre compte des crises politiques successives de la période post-adhésion en Bulgarie et Roumanie, nous avons formulé l’hypothèse que le cas roumain peut être ...
Alexandru Gussi
doaj  

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