Results 41 to 50 of about 7,575 (270)

One‐Step Synthesis of Si–Graphene Heterostructures via in‐Flight Gas‐Phase Mixing for High‐Capacity Silicon‐Rich Anodes

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A one‐step gas‐phase synthesis directly assembles amorphous Si nanoparticles with few‐layer graphene heterostructures via in‐flight mixing. Compositions with only 15 wt.% FLG deliver ~2800 mAh g−1 (Si + FLG) at 0.05 C and retain ~1400 mAh g−1 after 100 cycles at a high cycling rate of 1 C, enabled by a percolated, strain‐buffering graphene network that
Muhammad Ali   +5 more
wiley   +1 more source

Transmissió intergeneracional del català i característiques sociodemogràfiques dels progenitors

open access: yesTreballs de Sociolingüística Catalana, 2016
L’article analitza les diferències en l’ús intergeneracional del català que declaren els estudiants universitaris de Barcelona, València i Palma.
Raquel Casesnoves-Ferrer, Josep ?. Mas
doaj  

Nanocubes and Cuboctahedra: Entropic Stabilization Versus Thermal Segregation in Rock Salt‐ and Spinel‐Type Multinary Oxides from Spray‐Flame Synthesis

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Spray‐flame synthesis enables highly flexible and scalable production of multinary and high‐entropy oxide nanoparticles due to high synthesis temperatures with subsequent quenching. Temperature‐dependent in situ diffraction of as‐synthesized materials clearly reveals entropy stabilization in rock salt lattices, while spinels—featuring tetrahedral and ...
Mohammed‐Ali Sheikh   +7 more
wiley   +1 more source

Sense memòria no hi ha futur : actes de les III Jornades de Joves Historiadors i Historiadores : Barcelona, Museu d'Història de Catalunya, 13, 14 i 15 de març del 2003 [PDF]

open access: yes, 2004
Introducció de Rafael Aracil i Jaume SobrequésLa memòria i el futur són les claus de volta que obre pas a una nova fornada de joves historiadores i historiadors dels Països Catalans.
Universitat de Barcelona. Associació de Joves Historiadors i Historiadores
core  

On the Structural Evolution Mechanism of Lignin‐Derived Hard Carbon for Refining Sodium‐Ion Storage

open access: yesElectron, EarlyView.
The lignin‐derived hard carbons with different microstructures were prepared under different carbonization temperature (600°C–1600°C) and carbonization time (0–6 h). The correlation between the local structure of all hard carbons and sodium‐ion storage performance was statistically analyzed. The optimized hard carbon anode has high‐rate performance and
Lei Zhong   +6 more
wiley   +1 more source

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

open access: yesGeological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito   +8 more
wiley   +1 more source

Ús de la llengua en els mitjans socials per part dels adolescents bilingües de Frísia

open access: yesTreballs de Sociolingüística Catalana, 2016
Aquest estudi explora l’ús del frisó, una llengua minoritària parlada a la província neerlandesa de Frísia, en els mitjans socials per part dels adolescents frisons.
Lysbeth Jongbloed-Faber   +3 more
doaj  

1era Assemblea de Joves d'UPV : Benicàssim 16 i 17 Novembre

open access: yes, 2009
Representació de dos joves, un noi i una ...
Castell, Josep
core  

Randomized Phase II Trial of Consolidation Pembrolizumab After Definitive Chemoradiotherapy in Locally Advanced Nasopharyngeal Carcinoma: KCSG HN19‐09, CONPELAN Study

open access: yesHead &Neck, EarlyView.
ABSTRACT Background The benefit of consolidation programmed cell death protein 1 (PD‐1) blockade after chemoradiotherapy in locoregionally advanced nasopharyngeal carcinoma (NPC) remains unclear. Methods Patients with stages II–IVB NPC were randomized (2:1) to pembrolizumab 200 mg or placebo every 3 weeks for up to 17 cycles after chemoradiotherapy ...
Sang Hoon Chun   +11 more
wiley   +1 more source

Experiències per a l’extensió de l’ús del català en l’educació en el lleure. El Taller d’educació per la llengua

open access: yesTreballs de Sociolingüística Catalana, 2013
Per aconseguir que una llengua moli i se n’estengui l’ús cal, en primer lloc, establir una estratègia seductora. I per a Tallers per la Llengua, en el context actual del català, aquesta estratègia implica necessàriament recórrer a elements com el ...
Carles Palau i Puig
doaj  

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