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The gradual deployment of intelligent and coordinated devices in the electrical power system needs careful investigation of the interactions between the various domains involved. Especially due to the coupling between ICT and power systems a holistic approach for testing and validating is required. Taking existing (quasi-) standardised smart grid system and test specification methods as a starting...
The design, construction and testing of a prosthetic foot system JACFE, developed at low cost, is presented. The project was proposed using the Systems development methodology, with a controlled evaluation through tests with a real user and a mobile application for the registration of user steps. After several adjustments and tests in the prototype design, favorable results were obtained, until the...
Renewable energy sources and further electrification of energy consumption are key enablers to decrease greenhouse gas emissions, but they also introduce increased complexity to the electric power system. The increased availability of automation, information and communication technology, and intelligent solutions for system operation have transformed the power system into a smart grid. To support...
A Human-Machine Interface (HMI) for Electrical Impedance Tomography was designed, where the tomographic system has been built with Off-The-Shelf components to simplify the construction and make it easy to assemble. This HMI Off-The-Shelf based tomograph has some characteristics as: Fast data displaying, portability, serial interface and a PC for operating is not necessary. Basic potential measurements...
A technique for reducing the offset at the frequency-dependent pinched hysteresis loop of memristor emulator circuits is introduced. The technique involves at integrating two DC voltage sources in the emulator circuits, keeping not only the circuit size reasonable, but also the original behavior equation of the memristor emulator circuits is not drastically modified. Using this technique, we will...
The present work shows a segmentation methodology of images for the identification of Trypanosoma cruzi parasite at adult stage with techniques of digital image processing. To implement the method, 83 sample images of blood smears stained with Giemsa dye containing the parasite were used. The identification method uses a segmentation in the HSI color space (Hue, Saturation, Intensity), which is separately...
This paper describes SPICE-compatible macromodels to model the nonlinear behavior of operational amplifiers (Op Amp) and current feedback operational amplifiers (CFOA). The proposed macro-models include not only those performance parameters more important of the Op Amp and CFOA like the dynamic range, slew-rate, DC gain and gain-bandwidth product, but parasitic resistors and capacitors associated...
Orbiting satellites and other spatial vehicles have complex trajectories that can usually be precisely approximated with analytical or numerical trajectory estimation algorithms. However, some scenarios, such as LEOP (Launch and Early Orbit Phase) or during critical manoeuvres, present greater angular uncertainty. During these, large dish antennas used for TT&C (Telemetry, Tracking & Command)...
En este artículo se presentan los resultados obtenidos del análisis de arco eléctrico realizado para el sistema eléctrico de una refinería. Se consideran los estudios de corto circuito, de coordinación de protecciones de sobrecorriente y los criterios establecidos en la NFPA 70E y el IEEE1584. Se presentan los valores calculados de energía incidente y el equipo de protección y ropa adecuada para el...
This paper we present a new computational scheme to derive the impulse response of p-step UFIR filter. We use a set of polynomials that can be expressed in terms of their kth moment to derive the same impulse response obtained by other methods. Furthermore, we apply the p-step UFIR filter in two cases: enhanced of a square signal and the denoisy image processing. Finally, some quantitative and qualitative...
This paper presents a new robust watermarking system for digital images. The main challenge in every watermarking algorithm is to create a high capable, robust and imperceptible scheme. Unlike other watermarking methods, our system encodes the watermark using a convolutional encoder and embeds the encoded watermark in the transform domain of an image using a direct sequence spread spectrum technique...
In this paper, we present a computational scheme for the implementation of p-step UFIR filter ultrasound image processing. The recursive scheme is focused both signal to noise ratio and root mean-square-error on filter improved performance. In this way, quantitative evaluations are computed to verify the performance carried out by the new recursive computational scheme under metrics. On the other...
In this paper we present a new generation of unbiased FIR filter called as p-step unbiased FIR filter. These filters present a computational ability and flexibility to realize three different processes: prediction, filtering and smoothing. Moreover, the medical ultrasound is an interesting area to the applications of p-step unbiased FIR filter type. This is due to the ultrasound images are contaminating...
The aim of this work is to compare the isothermal crystallization kinetic in the films along GeTe-Sb2Te3 line with composition Ge2Sb2Te5, Ge1Sb2Te4, Ge1Sb4Te7 and Ge4Sb1Te5 using mainly Johnson-Mehl-Avrami-Kolmogorov (JMAK) model. Results obtained have shown different crystallization mechanism in the investigated films. In Ge2Sb2Te5 and Ge1Sb2Te4 films the analysis of the kinetic results (Avrani coefficient)...
In this paper, we proposed a new smoother FIR hybrid (SFH) structure to the enhance ultrasound image processing. Three particular cases are development into of the SFH structure, the linear, quadratic and cubic cases, respectively. Furthermore, we research the analysis noise power gain of each case and verified the quantitative performance of SFH structure with respect to N vs. root mean-square-error...
The aim of this work is to investigate the amorphous-to-crystalline phase transformation process in Ge2Sb2Te5 ternary alloys. The experiments were carried out using impedance and X-ray diffraction measurements. The results have shown that the crystallization process in an amorphous Ge2Sb2Te5 alloy starts from nuclei, which appear below Tc and which were identified as the crystalline Ge1Sb4Te7. As...
Fusion energy is the next generation of energy. The devices that scientists are using to carry out their researches need more energy than they produce, because many problems are presented in fusion devices. In magnetic confinement devices, one of these problems is the transport of particles in the confined plasma. Some modeling tools can be used to improve the transport levels, but the computational...
The proposed procedure allows us to remark easily the interaction between the antenna and the simulated channel. The procedure not only permits to simulate the interaction between ideal antennas and channels but it could make to interact real antennas with the simulated channel by using a file with measured pattern. Moreover, it is applicable to evaluate radiation systems orientated to MIMO (multiple...
Interaction and usability aspects of software systems are critical software quality measures. This paper reports on work done in the European funded wearable computing project wearIT@work. Utilizing user centered design, we present the results of a user study conducted to evaluate different wearable input devices for menu-selection tasks in aircraft maintenance. Due to access to end users provided...
The aim of this work was to investigate the crystallization properties and crystallization temperature in SbTe thin films, with different content of Sb, using DSC, optical reflection at 650 nm and XRD measurements. DSC studies showed that crystallization temperature of the films depend on the Sb content. XRD measurements have shown that films with low Sb contents (less that 73 at. %) directly crystallized...
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