Results 21 to 30 of about 573,722 (223)

Self‐Cooling Molecular Spin Qudits

open access: yesAdvanced Materials, EarlyView.
A material made of [GdEr] molecular dimers can encode a qudit and perform as a magnetic refrigerant. Microwave resonant pulses coherently manipulate its 16 spin states, while direct demagnetization measurements cool the material and a device down to temperatures below 1 K.
Elías Palacios   +12 more
wiley   +1 more source

El gasto en salud de los hogares colombianos : Un análisis descriptivo

open access: yesLecturas de Economía, 2009
Usando la teoría de la elección podemos establecer cómo ciertas características poblacionales inciden sobre los perfiles de gasto en salud de los hogares colombianos.
Manuel Ramírez   +2 more
doaj   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

open access: yesAdvanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades   +7 more
wiley   +1 more source

Análisis de la situación de pobreza en Medellin a partir de la encuesta de calidad de vida, 2004-2005

open access: yesLecturas de Economía, 2009
Este trabajo analiza los resultados de las Encuestas de Calidad de Vida 2004 y 2005 en Medellín, para determinar los avances en desarrollo humano y calidad de vida de la ciudad durante la administración Fajardo hasta 2006.
Jorge Flórez   +2 more
doaj   +1 more source

2D Co‐Mo‐Hydroxide‐Based Multifunctional Material for the Development of H2‐Based Clean Energy Technologies

open access: yesAdvanced Materials, EarlyView.
2D α‐Co(OH)2 interleaved with Mo species displays an appealing dual functionality for the production and use of green hydrogen.Mo incorporation greatly benefits the electrochemical behaviour in Oxygen Evolution Reaction for H2 production, while the magnetocaloric response at liquid H2 temperature paves the way for alternative cryogenic refrigerants ...
Daniel Muñoz‐Gil   +14 more
wiley   +1 more source

Producción académica en Economía de la Salud en Colombia, 1980-2002

open access: yesLecturas de Economía, 2009
La Economía de la Salud ha tenido un notable ascenso en las últimas décadas. En Colombia, la producción en esta área es incipiente, con un 80% de los artículos nacionales y trabajos de grado de economía del período 1980-2002 elaborados a partir de 1993 ...
Karem Espinosa   +2 more
doaj   +1 more source

Spin‐Split Edge States in Metal‐Supported Graphene Nanoislands Obtained by CVD

open access: yesAdvanced Materials, EarlyView.
Combining STM measurements and ab‐initio calculations, we show that zig‐zag edges in graphene nanoislands grown on Ni(111) by CVD retrieve their spin‐polarized edge states after intercalation of a few monolayers of Au. ABSTRACT Spin‐split states localized on zigzag edges have been predicted for different free‐standing graphene nanostructures.
Michele Gastaldo   +6 more
wiley   +1 more source

Cambios en la estructura de los salarios urbanos en Colombia, 1984-2000

open access: yesLecturas de Economía, 2009
Entre 1984 y 2000 se registraron variaciones importantes en la relación entre salarios de los trabajadores de mayor y menor nivel educativo que alteraron el grado de desigualdad en la distribución del ingreso salarial.
Luis Eduardo Arango   +2 more
doaj   +1 more source

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

open access: yesAdvanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro   +13 more
wiley   +1 more source

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