Física Aplicada: Enviaments recents
Ara mostrant els elements 221-240 de 556
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 ...
Assessment of PM10 and heavy metal concentration in a ceramic cluster (NE Spain) and the influence on nearby soils
Environmental pollution control is one of the most important goals in pollution risk assessment today. The aim of this study is to conduct a retrospective view of the evolution of matter particulate (PM10) and the heavy ...
Light-induced strain and its correlation with the optical absorption at charged domain walls in polycrystalline ferroelectrics
Photostrictive materials have a growing interest because of their great potential as light-driven actuators, among other optomechanical applications. In this context, the optical control of macroscopic strain in ferroelectrics ...
Weather Types Affect Rain Microstructure: Implications for Estimating Rain Rate
Quantitative precipitation estimation (QPE) through remote sensing has to take rain microstructure into consideration, because it influences the relationship between radar reflectivity Z and rain intensity R. For this ...
Crystal growth characterization of polycrystalline silicon films obtained by hot-wire chemical vapour deposition
Polycrystalline silicon (poly-Si) films were obtained at moderate temperatures (280-500ºC) from a mixture of silane and hydrogen in a hot wire CVD reactor. SEM and TEM results revealed a columnar growth of poly-Si grains ...
Inter-comparison and potential synergies of three methods for weather radar antenna pointing assessment
Three methods for estimation of the weather radar antenna azimuth and elevation pointing offsets are compared. Two of the methods reviewed use the known location of the sun as a reference. The first of these methods is ...
On axis interferometric detection using a binary joint transform correlator
Recently, we proposed an approach to obtain a single on-axis correlation with use of a joint transform correlator. That method required a displaying device with a determinate configuration, however, in this work we introduce ...
Effects of thresholding level variation in fringe binarization of multiobject joint transform correlation
It is possible to improve the fringe binarization method of joint transform correlation by choosing a suitable threshold level.
Fonament de l'arc de Sant Martí
Aquest fenomen té lloc per la reflexió i la refracció de la llum del Sol a traves de les gotes d'aigua que es troben en suspensió en l'aire. L'arc de Sant Martí tant sols es pot veure en una determinada direcció. Això es ...
Stability of hydrogenated nanocrystalline silicon thin-film transistors
Hydrogenated nanocrystalline silicon thin-films were obtained by catalytic chemical vapour deposition at low substrate temperatures (150°C) and high deposition rates (10 Å/s). These films, with crystalline fractions over ...
Computer-aided procedure for optimization of layer thickness uniformity in thermal evaporation physical vapor deposition chambers for lens coating
A computer-aided method to improve the thickness uniformity attainable when coating multiple substrates inside a thermal evaporation physical vapor deposition unit is presented. The study is developed for the classical ...
Deposition and characterisation of sputtered molybdenum oxide thin films with hydrogen atmosphere
Sputtered films of reduced molybdenum oxide (MoOx) with a molybdenum trioxide target in different pressures and atmospheres were deposited in varying temperatures. Compositional, optic, and electric characteristics of the ...
Chemotactic synthetic vesicles: Design and applications in blood-brain barrier crossing
In recent years, scientists have created artificial microscopic and nanoscopic self-propelling particles, often referred to as nano- or microswimmers, capable of mimicking biological locomotion and taxis. This active ...
Plasma parameters of pulsed-dc discharges in methane used to deposit diamondlike carbon films
Here we approximate the plasma kinetics responsible for diamondlike carbon (DLC) depositions that result from pulsed-dc discharges. The DLC films were deposited at room temperature by plasma-enhanced chemical vapor deposition ...
A new and simple variable-angle accessory for infrared specular reflectance
A simple, low-cost accessory (patent pending) with only two flat mirrors and a new variable-angle mechanism has been developed for infrared specular reflectance measurements. The system allows the angles of incidence to ...
Por qué el creciente impacto de las inundaciones no se debe solo al cambio climático
Las imágenes que vimos hace poco de Benicàssim tras unas lluvias que acumularon más de 200 l/m² en pocas horas, el vídeo viral en las redes del metro inundado en China, las trágicas inundaciones que asolaron pueblos ...
Degradation of thin tungsten filaments at high temperature in HWCVD
The degradation of the filaments is usually studied by checking the silicidation or carbonization status of the refractory metal used as catalysts, and their effects on the structural stability of the filaments. In this ...
Growth and functionalization of carbon nanotubes on quartz filter for environmental applications
Background: Air pollution has become an important issue worldwide due to its adverse health effects. Among the different air contaminants, volatile organic compounds (VOCs) are liquids or solids with a high vapor pressure ...
Improving lithium-ion battery performance through patterned growth of carbon nanotubes over vertically aligned silicon nanowires
The pursuit of high-performance electrode materials for rechargeable energy storage systems has intensified recently. In this study, we introduce a novel fabrication method that precisely covers as-grown carbon nanotubes ...
