Física Aplicada: Recent submissions
Now showing items 221-240 of 556
Controlled-intensity detection peaks in a binary joint transform correlator
In multiobject pattern recognition the height of the correlation peaks should be controlled when the power spectrum of ajoint transform correlator is binarized. In this paper a method to predetermine the value of detection ...
Elaboració d'una base de dades per a l'autoformació i autoavaluació de coneixements i competències en estudis científics superiors
L'objectiu principal és oferir uns recursos educatius multimèdia (en format HTML i JAVA) utilitzables en línea (Internet) o en suport autònom (CD-ROM) per a l'autoformació i l'autoevaluació ...
Characterization of a Mediterranean flash flood event using rain gauges, radar, gis and lightning data
Flash flood events are very common in Catalonia, generating a high impact on society, including losses in life almost every year. They are produced by the overflowing of ephemeral rivers in narrow and steep basins close ...
Structure of a-Si:H/a-Si1-xCx:H multilayers deposited in a reactor with automated substrate holder
This paper deals with the structural properties of a-Si:H/a-Si1-xCx: H multilayers deposited by glow-discharge decomposition of SiH4 and SiH4 and CH4 mixtures. The main feature of the rf plasma reactor is an automated ...
Metabolically Active, Fully Hydrolysable Polymersomes
The synthesis and aqueous self-assembly of a new class of amphiphilic aliphatic polyesters are presented. These AB block polyesters comprise polycaprolactone (hydrophobe) and an alternating polyester from succinic acid and ...
Use of bias correction techniques to improve seasonal forecasts for reservoirs - A case-study in northwestern Mediterranean
In this paper, we have compared different bias correction methodologies to assess whether they could be advantageous for improving the performance of a seasonal prediction model for volume anomalies in the Boadella reservoir ...
Power effect on the properties of copper nitride films as solar absorber deposited in pure nitrogen atmosphere
Nowadays, the copper nitride (Cu3N) is of great interest as a new solar absorber material, flexible and lightweight thin film solar cells. This material is a metastable semiconductor, non-toxic, composed of earth-abundant ...
On the Hall effect in polycrystalline semiconductors
Some problems involved in the interpretation of Hall‐effect measurements in polycrystalline semiconductors have not been resolved, especially when the contribution of the boundaries is appreciable. Using the Herring theory ...
Ray tracing for ophthalmic optics. Specific developments for GRIN materials
In this work we present the developments for the simulation of image formation through an ophthalmic lens. The procedure is, essentially an exact ray tracing taking into account the particular mobility conditions of the ...
Correlation postprocessing-based method for the detection of de focused images
We present a method to detect patterns in defocused scenes by means of a joint transform correlator. We describe analytically the correlation plane, and we also introduce an original procedure to recognize the target by ...
One-pot synthesis of oxidation-sensitive supramolecular gels and vesicles
The open-source article introduces a one-pot synthesis method for oxidation-sensitive supramolecular gels and vesicles, marking asignificant advancement in biodegradable and environmentally friendly nanomaterials. ...
Expanding the perspective of polymeric selective contacts in photovoltaic devices using branched polyethilimine
This work studies the use of polymeric layers of polyethylenimine (PEI) as an interface modification of electron-selective contacts. A clearly enhanced electrical transport with lower contact resistance and significant ...
Collection asymmetry in a drift-driven p-i-n solar cell
An analytical expression for the voltage dependence of the internal collection efficiency of amorphous silicon p-i-n solar cells is presented. The influence of arbitrary drift lengths (asymmetrical case) is taken into ...
Ultrafine particles produced by plasma enhanced chemical vapor deposition -from SiH4, CH4, NH3 and B2H6 gas mixtures- for nanostructured ceramics applications
[eng] Ultrafine particles of silicon and related binary and ternary alloys of the Si-B-C-N system produced in our research group from silane, methane, diborane, ammonia and nitrogen precursor gases by plasma enhanced ...
Impact of the RF Power on the Copper Nitride Films Deposited in a Pure Nitrogen Environment for Applications as Eco-Friendly Solar Absorber
This material can be considered to be an interesting eco-friendly choice to be used in the photovoltaic field. In this work, we present the fabrication of Cu3N thin films by reactive radio-frequency (RF) magnetron sputtering ...
Study of post-deposition contamination in low-temperature deposited polysilicon films
The presence of hydrogen in polysilicon films obtained at low temperatures by hot-wire CVD and the post-deposition oxidation by air-exposure of the films are studied in this paper. The experimental results from several ...
Full complex Fresnel holograms displayed on liquid cristal devices
We propose an implementation to display full complex information using two ferroelectric liquid crystals spatial light modulators. We compare the simulated and experimental results obtained.
Extreme point rainfall temporal scaling: a long term (1805-2014) regional and seasonal analysis in Spain
This paper presents a regional and seasonal study of extreme point rainfall scaling from 10 min to 2 years. To do this, the highest point‐based rainfall list based on these temporal periods was calculated from the Spanish ...
Diffraction theory of Fresnel lenses encoded in low-resolution devices
A mathematical model that describes the behavior of low-resolution Fresnel lenses encoded in any low-resolution device (e.g., a spatial light modulator) is developed. The effects of low-resolution codification, such the ...
High-impact floods and flash floods in mediterranean countries: the FLASH preliminary database
This paper contains a preliminary analysis of flood risk in Mediterranean countries, conducted within the framework of the FLASH European Project. All flood events recorded between 1990 and 2006 in the Mediterranean region ...
