F. Rosa

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In the present paper, an electronic prototype designed to acquire electrocardiographic signals from marine mammals has been developed. The system consists of a portable device that allows the on-line acquisition of EKG signals through a parallel port interface that is connected to a laptop computer. The EKG waveform, the voltage level, the bandwidth and the(More)
We examine a recent prediction for the chirality dependence of the Casimir force in chiral metamaterials by numerical computation of the forces between the exact microstructures, rather than homogeneous approximations. Although repulsion in the metamaterial regime is rigorously impossible, it is unknown whether a reduction in the attractive force can be(More)
The CAFADIS camera project has consisted in building a camera to measure wave-front phases and distances under different scenarios (from microns to kilometres), using highly specialised electronic technology, namely Graphics Processing Units (GPUs) and Field Programmable Gate Arrays (FPGAs). It is a passive method of depth extraction, it uses incoherent(More)
This paper presents a method to co-phase segmented mirror. For this purpose, we use the geometric sensor, thus only two defocused images are acquired. The van Dam and Lane algorithm [1] is applied to obtain the tip-tilt in every segment, and a new method is used to restore the original local piston. Furthermore, by using specialized hardware the(More)
In the last years, interest on depth extraction from 4D light fields has increased. These techniques rely on the detection of slopes of planar structures in the light field function. These structures are also found as linear structures in epipolar image representations of the light field. Since EPI-representations are 2D signals, known orientation detection(More)
The aim of this paper is to illustrate the structure of X‐farm, a model to manage farming systems under energetic, economical, ecological perspective, using the dynamic simulation approach. The farm is targeted to achieve the energetic self‐sufficiency, by using a quota of the total biomass produced in farm for the production of energy as oil, biogas or(More)
This article presents a practical implementation of an ECG compression algorithm using a Max-Lloyd quantizer, to optimize the low resources of an ECG acquisition and transmission system (telemetry system) for dolphins and human divers. The algorithm scheme is based on a first-order differential pulse code modulation (DPCM) and uses a Max-Lloyd quantizer to(More)
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