Física Aplicada: Enviaments recents
Ara mostrant els elements 241-260 de 556
Advances in xmipp for cryo-electron microscopy: From xmipp to scipion
Xmipp is an open-source software package consisting of multiple programs for processing data originating from electron microscopy and electron tomography, designed and managed by the Biocomputing Unit of the Spanish National ...
Tècniques de reconstrucció d'imatges en SPECT
L'espectacular avenç en la tecnologia mèdica que s'ha produït en els darrers anys, i l'augment de potencia de càlcul dels ordinadors, han generalitzat la utilització de tècniques cada vegada més sofisticades en l'àmbit del ...
Studies on grain boundaries in nanocrystalline silicon grown by Hot-Wire CVD
The use of a tantalum wire in hot-wire chemical vapour deposition (HWCVD) has allowed the deposition of dense nanocrystalline silicon at low filament temperatures (1550 °C). A transition in the crystalline preferential ...
In situ fast ellipsometric analysis of repetitive surface phenomena
We present an ellipsometric technique and ellipsometric analysis of repetitive phenomena, based on the experimental arrangement of conventional phase modulated ellipsometers (PME) c onceived to study fast surface phenomena ...
Observacions amb radar meteorològic en condicions de bloqueig topogràfic
Els radars meteorològics ubicats en zones muntanyoses experimenten el que es coneix com a bloqueig topogràfic. El bloqueig consisteix en el fet que una part de l'energia emesa pel radar és interceptada per les muntanyes ...
Magnetic studies of Fe-Y compositionally modulated thin films
Compositionally modulated thin films of Y/Fe have been studied by using SQUID magnetometry. Samples were grown by electron‐beam evaporation onto Kapton substrates. In the low applied field regime, the samples show irreversible ...
Analyse d’une alerte massive arrivée tardivement lors des inondations survenues à Valence (Espagne) le 29 octobre 2024.
Les inondations survenues le 29 octobre 2024 au sud de Valence (Espagne) ont entraîné un lourd bilan humain (229 personnes décédées) et matériel (22 milliards d’euros de dégâts). Les intensités des pluies ont entraîné des ...
Light induced defects in thermal annealed hydrogenated amorphous silicon
The metastable defects of a-Si:H samples annealed at temperatures in the 300-550°C range have been studied by photothermal deflection spectroscopy (PDS). The light-soaked samples show an increase in optical absorption in ...
In situ spectroellipsometric study of the nucleation and growth of amorphous silicon
A detailed in situ spectroellipsometric analysis of the nucleation and growth of hydrogenated amorphous silicon (a:Si:H) is presented. Photoelectronic quality a‐Si:H films are deposited by plasma‐enhanced chemical vapor ...
Thin silicon films ranging from amorphous to nanocrystalline obtained by Hot-Wire CVD
In this paper, we have presented results on silicon thin films deposited by hot-wire CVD at low substrate temperatures (200 °C). Films ranging from amorphous to nanocrystalline were obtained by varying the filament temperature ...
Floods in the Pyrenees: A global view through a regional database
This paper shows the first systematic datasetof flood episodes referring to the entire Pyrenees massif,named PIRAGUA_flood, which covers the period 1981–2015 (available at http://hdl.handle.net/10261/270351, lastaccess: ...
Internal variability of the winter North Atlantic Oscillation longitudinal displacements
The winter North Atlantic Oscillation (NAO), one of the leading modes of atmospheric variability in the Northern Hemisphere and key driver of surface climate anomalies, was long considered to be spatially stable. Yet, its ...
Spin-orbit entanglement driven by the Jahn-Teller effect
Spin-orbit entanglement in 4d and 5d transition metal systems can enhance electronic correlations, leading to nontrivial ground states and the emergence of exotic excitations. There is also an interest to investigate ...
Rapid amyloid-β clearance and cognitive recovery through multivalent modulation of blood–brain barrier transport
The blood‒brain barrier (BBB) is a highly selective permeability barrier that safeguards the central nervous system (CNS) from potentially harmful substances while regulating the transport of essential molecules. Its ...
Challenges for drought assessment in the Mediterranean region under future climate scenarios
Droughts can have strong environmental and socio-economic impacts in the Mediterranean region, in particular for countries relying on rain-fed agricultural production, but also in areas in which irrigation plays an important ...
The minimal chemotactic cell
The movement of cells and microorganisms in response to chemical gradients (chemotaxis) has played an essential role in the evolution of many biological processes. Cellular navigation works via the holistic assembly of ...
Efficient flexible electrodes for lithium-ion batteries utilizing well-dispersed hybrid Mo2C nanoparticles on vertically-oriented graphene nanowalls
Flexible lithium-ion batteries (LIBs) have gained significant interest as potential power source solutions for wearable and flexible electronic devices. However, the fabrication of flexible LIBs with optimal flexibility, ...
Comprehensive analysis of MAX phase and MXene materials for advanced photocatalysis, electrocatalysis and adsorption in hydrogen evolution and storage
Over the past twenty-five years, MAX phases and their derivatives, MXenes, have become a focal point in materials research. These compounds seamlessly blend ceramic and metallic properties, offering high thermal and ...
Fast topographic optical imaging using encoded search focal scan
A central quest in optics is to rapidly extract quantitative information from a sample. Existing topographical imaging tools allow non-contact and three-dimensional measurements at the micro and nanoscales and are essential ...
Towards the real-time measurement of Ultrasound Fields by combining Schlieren Tomography and Wavefront Sensing
Recent advances in ultrasound generation such as ultrasonic holography and acoustic tweezers require methods for the fast characterization of pressure fields. Typically, this can be achieved by using a hydrophone, but the ...
