Física Aplicada: Enviaments recents
Ara mostrant els elements 201-220 de 556
Growth and magnetic properties of multiferroic LaxBi1-xMnO3 thin films
A comparative study of LaxBi1-xMnO3 thin films grown on SrTiO3 substrates is reported. It is shown that these films grow epitaxially in a narrow pressure-temperature range. A detailed structural and compositional ...
Polycrystalline silicon films obtained by hot-wire chemical vapour deposition
Silicon films were deposited at moderate substrate temperatures (280-500° C) from pure silane and a silane-hydrogen mixture (10% SiH 4, 90% H 2) in a hotwire CVD reactor. The morphology, structure and composition of the ...
Investigations on doping of amorphous and nano-crystalline silicon films deposited by catalytic chemical vapour deposition
Hydrogenated amorphous and nanocrystalline silicon, deposited by catalytic chemical vapour deposition, have been doped during deposition by the addition of diborane and phosphine in the feed gas, with concentrations in the ...
Extreme precipitation records in Antarctica
Monitoring extreme precipitation records (EPRs), that is, the most extreme precipitation events, is a challenge in Antarctica due to the reduced number of stations available in the continent and the limitations of the ...
The Electronic Structure of Co-Sputtered Zinc Indium Tin Oxide Thin Films
Zinc indium tin oxide (ZITO) transparent conductive oxide layers were deposited via radio frequency (RF) magnetron co-sputtering at room temperature. A series of samples with gradually varying zinc content was investigated. ...
Equilibrium and nonequilibrium gap-state distribution in amorphous silicon
A general and straightforward analytical expression for the defect-state-energy distribution of a-Si:H is obtained through a statistical-mechanical treatment of the hydrogen occupation for different sites. Broadening of ...
Reconeixement d'imatges
Rep el nom de reconeixement de formes el procés pel qual es pot reconèixer una determinada imatge (motiu) dins d'una escena complexa que la conté. La seva finalitat consisteix a detectar la forma en l'escena i, en cas ...
Flash-floods in Catalonia: the social perception in a context of changing vulnerability
In assessing a flood event two risk components need to be considered: the intrinsic hazard of the hydrome- teorological event causing the flood and the vulnerability of the area where the precipitation has been registered. ...
Panta Rhei: a decade of progress in research on change in hydrology and society
To better understand the increasing human impact on the water cycle and the feedbacks between hydrology and society need to be better understood. As a consequence, the International Association of Hydrological Sciences ...
Obtención de láminas delgadas de Y-Ba-Cu-O sobre Si (100)
Se ha utilizado la evaporación secuencial de Cu, Y2O3 y BaF2 para la obtención de láminas delgadas superconductoras de YBa-CuO sobre substratos de Si monocristalino con orientación [100], recubiertos con una lámina barrera ...
Polarimetric 3D integral imaging in photon-starved conditions
We develop a method for obtaining 3D polarimetric integral images from elemental images recorded in low light illumination conditions. Since photon-counting images are very sparse, calculation of the Stokes parameters and ...
Land Use and Topography Influence in a Complex Terrain Area: A High Resolution Mesoscale Modelling Study over the Eastern Pyrenees using the WRF Model
Different types of land use (LU) have different physical properties which can change local energy balance and hence vertical fluxes of moisture, heat and momentum. This in turn leads to changes in near-surface temperature ...
Understanding Optical Trapping Phenomena: a Simulation for Undergraduates
Optical trapping is an attractive and multidisciplinary topic that has become the center of attention to a large number of researchers. Moreover, it is a suitable subject for advanced students that requires a knowledge of ...
The Results of Applying Different Methodologies to 10 Years of Quantitative Precipitation Estimation in Catalonia Using Weather Radar
The single polarization C-Band weather radar network of the Meteorological Service of Catalonia covers the entire region (32,000 km2), which allows it to apply a series of corrections that improve preliminary estimations ...
Ion assisted deposition of thin films by substrate tuned radio frequency magnetron sputtering
The substrate tuning technique was applied to a radio frequency magnetron sputtering system to obtain a variable substrate bias without an additional source. The dependence of the substrate bias on the value of the external ...
Stratiform and Convective Rain Classification Using Machine Learning Models and Micro Rain Radar
Rain type classification into convective and stratiform is an essential step required to improve quantitative precipitation estimations by remote sensing instruments. Previous studies with Micro Rain Radar (MRR) measurements ...
Importance of late fall ENSO teleconnection in the Euro-Atlantic sector
Recent studies have indicated the importance of fall climate forcings and teleconnections in influencing the climate of the northern mid-to-high latitudes. Here, we present some exploratory analyses using observational ...
Variable optical elements for fast focus control
In this Review, we survey recent developments in the emerging field of high-speed variable-z-focus optical elements, which are driving important innovations in advanced imaging and materials processing applications. ...
Microdoping compensation of microcrystalline silicon obtained by Hot-Wire Chemical Vapour Deposition
Undoped hydrogenated microcrystalline silicon was obtained by hot-wire chemical vapour deposition at different silane-to-hydrogen ratios and low temperature (<300 °C). As well as technological aspects of the deposition ...
Local characterization of the polarization state of 3D electromagnetic fields: an alternative approach
A precise knowledge of the polarization state of light is crucial in technologies that involve the generation and application of structured light fields. The implementation of efficient methods to determine and characterize ...
