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Four paintings attributed to Hermenegildo Bustos were scanned by terahertz time-domain imaging. The THz records clearly show previous depictions underneath the current ones.
In this paper, a novel multi-modal method for person identification in indoor environments is presented. This approach relies on matching the skeletons detected by a Kinect v2 device with wearable devices equipped with inertial sensors. Movement features such as yaw and pitch changes are employed to associate a particular Kinect skeleton to a person using the wearable. The entire process of sensor...
In this paper we present the development of a noninvasive method for the evaluation of the degree deterioration of the diabetic foot using terahertz time domain spectroscopy. The study is based on the monitoring of hydration of the skin on the sole of the foot.
In this work, a nonlinear method to study multivariate interactions, called multivariate symbolic dynamics (MSD), was introduced. The usefulness of this technique was studied on respiratory-cardiovascular data from young women with vasovagal syncope (VVS) and from healthy subjects. The study included 16 female patients diagnosed with VVS and 24 age-matched healthy subjects (12 women). All subjects...
In this work, a graphical method to study cardiovascular coupling, called delta space plot analysis (DSPA), was introduced. The graphical representation is susceptible to be parameterized in shape and orientation. The usefulness of this technique was studied on cardiovascular data from patients with vasovagal syncope (VVS) and from controls. The study included 15 female patients diagnosed with VVS...
In this article, a bilateral output feedback controller to solve the trajectory tracking problem of a Master-Slave mechanical system is designed. A robust disturbance rejection scheme was implemented to regulate the slave trajectory. A Linear Extended State Observer of GPI class was used to, both, estimate the non-measurable states of the mechanical systems as well as the global disturbance input,...
This paper proposes a prediction system to make a forecast of temperature which is based on support vector machines. The system uses a database which provides information about weather parameters such as pressure, temperature, wind speed, etc. In order to adapt the input data, the present proposal has applied a pre-processing method before the prediction phases start. The best testing results have...
The gradual shift of cardiac autonomic regulation toward sympathetic predominance and vagal withdrawal during graded head-up tilt test in young controls has been demonstrated by parameters from symbolic dynamics obtained from short-term heart rate variability (HRV) analysis. In this study, the influence of gender and vasovagal syncope (VVS) on the autonomic response to an orthostatic challenge was...
This paper presents the control during take-off, transition and straight and level flight of a convertible aircraft based on Gain-Scheduling technique. The vehicle motion equations are deduced using Newton-Euler formulation. The lift, drag and pitch moment coefficients are modeled for angle of attack variations between one hundred eighty degrees and minus one hundred eighty degrees based on preliminary...
Gender related-differences in the autonomic regulation of the cardiovascular and cardiorespiratory systems have been studied mainly by hemodynamic responses during different physical stressors. In this study, the influence of gender on the autonomic response to an orthostatic challenge was investigated by obtaining the cardiovascular and cardiorespiratory coupling using the nonlinear technique known...
To know in advance the value of solar radiation is an advantage in order to obtain solar energy. This paper proposes the design and implementation of solar radiation modelling for the estimation of the solar energy generation, based on different series of data collected from meteorological stations in Gran Canaria and Tenerife (Canary Islands, Spain), helping to generate green energy from sun by the...
This paper presents a platform to study the relationship between upper limb kinematic and biopotential measurements. The platform comprises of a haptic joystick, biopotential acquisition systems and 3D rendered virtual tasks that require user interaction. The haptic joystick, named TeeR, reproduces the pronation-supination and flexion-extension movements of the human arm, which are directly mapped...
This paper proposes the design and implementation of wind speed modelling for the estimation of the wind energy generation, based on different series of data collected from meteorological stations at the Gran Canaria Airport and Tenerife Sur Airport (Canary Islands, Spain), that helps to generate green energy from wind by the estimation of wind speed. The classification method applied, in order to...
In this paper, a 1 GHz class E2 DC/DC converter, implementing a frequency-modulation (FM) control, is proposed for efficiently handling wideband wireless signal envelopes. Properly terminating the inverting and rectifying GaN HEMT devices, a nearly linear output voltage versus switching frequency profile is obtained, with 70% efficiency at a voltage value 5.1 dB below the peak. Incorporating a Voltage...
The main goal of formation control strategies is to coordinate a robot team to achieve a desired formation pattern. Some applications of formation control, for instance sensing coverage, searching and rescue, transportation of large objects, etc. require to establish the desired positions of the robots according to an strategic and equidistant spatial coverage within the work area or boundary. This...
In the Hierarchical Path Computation Element (H-PCE) architecture, an optimum end-to-end path is computed using a hierarchical relationship among PCEs. An H-PCE-based path computation procedure provides low network blocking probability meanwhile it results on a great amount of control overhead messages. In this paper we propose a hybrid path computation procedure based on the H-PCE architecture and...
In this paper, a general teletraffic analysis to evaluate the performance of cognitive radio networks with arbitrary order Coxian distributed channel holding time in the primary network is developed. The relevance of the considered Coxian model relies on its universality property, mathematical tractability, reduced dimensionality, and the fact that it generalizes a large class of useful previous employed...
Channel holding time is fundamental for the performance analysis/evaluation of mobile cellular networks. Channel holding time depends on both call holding time and cell dwell time. In the literature, many assumptions on cell dwell time distribution have been done and different channel holding time characteristics have been obtained. However, to our knowledge, channel holding time statistics has not...
This paper presents a trajectory tracking control strategy for unicycles based on local potential functions and the leader-followers scheme. The leader robot must follow a prescribed trajectory and the rest of the robots follows the leader whereas achieves a desired formation at the same time. Every follower robot does not possess a global information about the leader path and the goals of the other...
In this paper, probability distributions of new and handoff call channel holding times in mobile cellular networks are derived under the assumption that cell dwell time has generalized Coxian distribution. It is shown that when cell dwell time has a generalized Coxian distribution, the resulting residual cell dwell time has generalized Coxian distribution as well. Furthermore, both new and handoff...
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