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A tool used to capture biomechanical signals from the upper limb is presented here. The methods used for data acquisition, signal fusion and joint amplitude measurements, elbow flexion/extension and pronation/supination, are also presented. To that aim, a device using two inertial and magnetic sensors fixed to the arm and the forearm body segments was implemented. These sensors are wired to a control...
Sleep apnea-hypopnea syndrome (SAHS) is a chronic sleep-related breathing disorder, which is currently considered a major health problem. In-lab nocturnal polysomnography (NPSG) is the gold standard diagnostic technique though it is complex and relatively unavailable. On the other hand, the analysis of blood oxygen saturation (SpO2) from nocturnal pulse oximetry (NPO) is a simple, noninvasive, highly...
This paper aims at evaluating a novel multi-class methodology to establish Sleep Apnea-Hypopnea Syndrome (SAHS) severity by the use of single-channel at-home oximetry recordings. The study involved 320 participants derived to a specialized sleep unit due to SAHS suspicion. These were assigned to one out of the four SAHS severity degrees according to the apnea-hypopnea index (AHI): no-SAHS (AHI<5...
A FPGA dedicated processor for the digital processing of the acquired signal in electrical capacitance tomography systems is presented. The objective of this IP core is to generate an adaptable and portable prototype which is meant to work with the acquisition electronics, i.e., this whole system offers an instrument suitable to be easily transported and applied to different ECT sensors and scenarios...
The Large Hadron Collider has envisaged a series of upgrades towards a High Luminosity LHC delivering five times the LHC nominal instantaneous luminosity. The ATLAS Phase II Upgrade will accommodate the detector and data acquisition system for the HL-LHC. In particular, the Tile Hadronic Calorimeter will completely replace front-end and back-end electronics using a new read-out architecture. The digitized...
Integrating DRC-like and Topology checks and in addition, incorporation of clamp interconnect resistance from Interconnect checks during ESD verification of SoC is presented. The benefit of integrating these three static methodologies together is shown by the detection of new critical constructions and the automatic waiving of uncritical ones.
A new type of ESD failure in an overvoltage tolerant I/O of a CMOS embedded flash technology is presented. The failure is caused by the triggering of a parasitic SCR formed by high voltage devices between I/O and supply. Several solutions to prevent the failure are shown.
This paper describes the design and implementation of the National Laboratory of Smart Grids in the University Campus (LAB+i) with the real-time integration of electricity, water and/or gas systems through six layers of Smart Grids that allow to make measurement of a process, local or remote communication in order to be integrated to the supervision and management system. Likewise in the following...
The age-related impairment is an increasing problem due to the aging suffered by the population, especially in developed countries. It is usual to use electroencephalogram (EEG)-based Brain Computer Interface (BCI) systems by means of the signal in order to assist and to improve the quality of life of people with disabilities. However, a parallel research line addresses the problem by the use of BCI...
The interest in model based current control has been steadily growing during the last years. In particular, predictive techniques using a model and an exhaustive optimizer have been used, with many variations, for current control of IM using a VSI. In this paper it is shown that predictive controllers using the standard quadratic cost function seem to be prone to produce currents with subharmonic...
Comfort conditions inside buildings are a problem that is being widely analyzed, since it has a direct effect on users' productivity, and an indirect effect on energy saving. Hence, in order to maintain thermal comfort and indoor-air quality inside a certain environment, it is required to perform a proper management of its active and passive components, as the HVAC (Heating, Ventilation and Air Conditioning)...
This paper presents the losses characterization on distribution transformers windings. The losses are determined through the Frequency Response Analysis (FRA), using the Finite Element Method (FEM). The losses on the windings are evaluated on a frequency range established from 100Hz to 2MHz for a specific transformer. Finally, a methodology is proposed, that can be applied to different transformers.
This paper presents the losses characterization on distribution transformers windings. The losses are determined through the Frequency Response Analysis (FRA), using the Finite Element Method (FEM). The losses on the windings are evaluated on a frequency range established from 100Hz to 2MHz for a specific transformer. Finally, a methodology is proposed, that can be applied to different transformers.
A barely approached of the topics in the area of Batch Process (BP) Control is controllability and stability analysis. This is because the dynamic characteristic of BPs makes the traditional analysis of these properties harder. Characteristics like the transitory dynamics of the states and the irreversibility of the states (from the dynamic systems point of view) are serious obstacles for the use...
Probabilistic text data modeling is usually considered with Bernoulli or multinomial event models. The main problem of text mining is the large amount of zero account in the matrix representation. Recently a document visualization technique incorporating the Zero Inflated Poisson model in the Generative Topographic Mapping algorithm has been proposed. This probabilistic model can be applied as a text...
Sleep staging is one of the most important tasks on the context of sleep studies. From more than 40 years the gold standard to the characterization of patient's sleep is the use of the rules proposed by Rechtschaffen and Kales (R&K). However this method has the limitation of the unnatural assignment of discrete stages instead of doing it in a continuous manner. As part of a more general framework,...
The aim of this study is to develop and evaluate an algorithm to help in the diagnosis of the obstructive sleep apnea syndrome (OSAS). Arterial oxygen saturation (SaO2) signals from nocturnal pulse oximetry were used to identify OSAS patients. A total of 149 SaO2 recordings from subjects suspected of OSAS were available. The initial population was divided into a training set (74 subjects) and a test...
This study assessed the hypothesis that blood oxygen saturation (SaO2) and electroencephalogram (EEG) recordings could provide complementary information in the diagnosis of the obstructive sleep apnea (OSA) syndrome. We studied 148 patients suspected of suffering from OSA. Classical spectral parameters based on the relative power in specified frequency bands (Af-band) or peak amplitudes (PA) were...
Illegal drag racing or street racing is a prominent safety concern in many major cities. This is especially the case in areas which have sections of road which are straight, level, and have low traffic at various times of day or night. This paper proposes a control mechanism for a system which is capable of detecting illegal street races and reporting them to the police automatically as they are occurring.
Surface electroenterogram (EEnG) is a non-invasive method for monitoring the intestinal motility. However, surface EEnG signals are contaminated by strong physiological interferences. The main interferences which affect high-frequency components of surface EEnG are cardiac activity and movement artifacts. The aim of this work is to quantify the effectiveness of a combined method based on empirical...
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